1 // This file is Copyright its original authors, visible in version control
4 // This file is licensed under the Apache License, Version 2.0 <LICENSE-APACHE
5 // or http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
6 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your option.
7 // You may not use this file except in accordance with one or both of these
10 //! The top-level channel management and payment tracking stuff lives here.
12 //! The [`ChannelManager`] is the main chunk of logic implementing the lightning protocol and is
13 //! responsible for tracking which channels are open, HTLCs are in flight and reestablishing those
14 //! upon reconnect to the relevant peer(s).
16 //! It does not manage routing logic (see [`Router`] for that) nor does it manage constructing
17 //! on-chain transactions (it only monitors the chain to watch for any force-closes that might
18 //! imply it needs to fail HTLCs/payments/channels it manages).
20 use bitcoin::blockdata::block::Header;
21 use bitcoin::blockdata::transaction::Transaction;
22 use bitcoin::blockdata::constants::ChainHash;
23 use bitcoin::key::constants::SECRET_KEY_SIZE;
24 use bitcoin::network::constants::Network;
26 use bitcoin::hashes::Hash;
27 use bitcoin::hashes::sha256::Hash as Sha256;
28 use bitcoin::hash_types::{BlockHash, Txid};
30 use bitcoin::secp256k1::{SecretKey,PublicKey};
31 use bitcoin::secp256k1::Secp256k1;
32 use bitcoin::{secp256k1, Sequence};
34 use crate::blinded_path::{BlindedPath, NodeIdLookUp};
35 use crate::blinded_path::message::ForwardNode;
36 use crate::blinded_path::payment::{Bolt12OfferContext, Bolt12RefundContext, PaymentConstraints, PaymentContext, ReceiveTlvs};
38 use crate::chain::{Confirm, ChannelMonitorUpdateStatus, Watch, BestBlock};
39 use crate::chain::chaininterface::{BroadcasterInterface, ConfirmationTarget, FeeEstimator, LowerBoundedFeeEstimator};
40 use crate::chain::channelmonitor::{ChannelMonitor, ChannelMonitorUpdate, WithChannelMonitor, ChannelMonitorUpdateStep, HTLC_FAIL_BACK_BUFFER, CLTV_CLAIM_BUFFER, LATENCY_GRACE_PERIOD_BLOCKS, ANTI_REORG_DELAY, MonitorEvent, CLOSED_CHANNEL_UPDATE_ID};
41 use crate::chain::transaction::{OutPoint, TransactionData};
43 use crate::events::{Event, EventHandler, EventsProvider, MessageSendEvent, MessageSendEventsProvider, ClosureReason, HTLCDestination, PaymentFailureReason};
44 // Since this struct is returned in `list_channels` methods, expose it here in case users want to
45 // construct one themselves.
46 use crate::ln::inbound_payment;
47 use crate::ln::types::{ChannelId, PaymentHash, PaymentPreimage, PaymentSecret};
48 use crate::ln::channel::{self, Channel, ChannelPhase, ChannelContext, ChannelError, ChannelUpdateStatus, ShutdownResult, UnfundedChannelContext, UpdateFulfillCommitFetch, OutboundV1Channel, InboundV1Channel, WithChannelContext};
49 pub use crate::ln::channel::{InboundHTLCDetails, InboundHTLCStateDetails, OutboundHTLCDetails, OutboundHTLCStateDetails};
50 use crate::ln::features::{Bolt12InvoiceFeatures, ChannelFeatures, ChannelTypeFeatures, InitFeatures, NodeFeatures};
51 #[cfg(any(feature = "_test_utils", test))]
52 use crate::ln::features::Bolt11InvoiceFeatures;
53 use crate::routing::router::{BlindedTail, InFlightHtlcs, Path, Payee, PaymentParameters, Route, RouteParameters, Router};
54 use crate::ln::onion_payment::{check_incoming_htlc_cltv, create_recv_pending_htlc_info, create_fwd_pending_htlc_info, decode_incoming_update_add_htlc_onion, InboundHTLCErr, NextPacketDetails};
56 use crate::ln::onion_utils;
57 use crate::ln::onion_utils::{HTLCFailReason, INVALID_ONION_BLINDING};
58 use crate::ln::msgs::{ChannelMessageHandler, DecodeError, LightningError};
60 use crate::ln::outbound_payment;
61 use crate::ln::outbound_payment::{Bolt12PaymentError, OutboundPayments, PaymentAttempts, PendingOutboundPayment, SendAlongPathArgs, StaleExpiration};
62 use crate::ln::wire::Encode;
63 use crate::offers::invoice::{BlindedPayInfo, Bolt12Invoice, DEFAULT_RELATIVE_EXPIRY, DerivedSigningPubkey, ExplicitSigningPubkey, InvoiceBuilder, UnsignedBolt12Invoice};
64 use crate::offers::invoice_error::InvoiceError;
65 use crate::offers::invoice_request::{DerivedPayerId, InvoiceRequestBuilder};
66 use crate::offers::offer::{Offer, OfferBuilder};
67 use crate::offers::parse::Bolt12SemanticError;
68 use crate::offers::refund::{Refund, RefundBuilder};
69 use crate::onion_message::messenger::{new_pending_onion_message, Destination, MessageRouter, PendingOnionMessage, Responder, ResponseInstruction};
70 use crate::onion_message::offers::{OffersMessage, OffersMessageHandler};
71 use crate::sign::{EntropySource, NodeSigner, Recipient, SignerProvider};
72 use crate::sign::ecdsa::EcdsaChannelSigner;
73 use crate::util::config::{UserConfig, ChannelConfig, ChannelConfigUpdate};
74 use crate::util::wakers::{Future, Notifier};
75 use crate::util::scid_utils::fake_scid;
76 use crate::util::string::UntrustedString;
77 use crate::util::ser::{BigSize, FixedLengthReader, Readable, ReadableArgs, MaybeReadable, Writeable, Writer, VecWriter};
78 use crate::util::logger::{Level, Logger, WithContext};
79 use crate::util::errors::APIError;
81 #[cfg(not(c_bindings))]
83 crate::offers::offer::DerivedMetadata,
84 crate::routing::router::DefaultRouter,
85 crate::routing::gossip::NetworkGraph,
86 crate::routing::scoring::{ProbabilisticScorer, ProbabilisticScoringFeeParameters},
87 crate::sign::KeysManager,
91 crate::offers::offer::OfferWithDerivedMetadataBuilder,
92 crate::offers::refund::RefundMaybeWithDerivedMetadataBuilder,
95 use alloc::collections::{btree_map, BTreeMap};
98 use crate::prelude::*;
100 use core::cell::RefCell;
102 use crate::sync::{Arc, Mutex, RwLock, RwLockReadGuard, FairRwLock, LockTestExt, LockHeldState};
103 use core::sync::atomic::{AtomicUsize, AtomicBool, Ordering};
104 use core::time::Duration;
105 use core::ops::Deref;
107 // Re-export this for use in the public API.
108 pub use crate::ln::outbound_payment::{PaymentSendFailure, ProbeSendFailure, Retry, RetryableSendFailure, RecipientOnionFields};
109 use crate::ln::script::ShutdownScript;
111 // We hold various information about HTLC relay in the HTLC objects in Channel itself:
113 // Upon receipt of an HTLC from a peer, we'll give it a PendingHTLCStatus indicating if it should
114 // forward the HTLC with information it will give back to us when it does so, or if it should Fail
115 // the HTLC with the relevant message for the Channel to handle giving to the remote peer.
117 // Once said HTLC is committed in the Channel, if the PendingHTLCStatus indicated Forward, the
118 // Channel will return the PendingHTLCInfo back to us, and we will create an HTLCForwardInfo
119 // with it to track where it came from (in case of onwards-forward error), waiting a random delay
120 // before we forward it.
122 // We will then use HTLCForwardInfo's PendingHTLCInfo to construct an outbound HTLC, with a
123 // relevant HTLCSource::PreviousHopData filled in to indicate where it came from (which we can use
124 // to either fail-backwards or fulfill the HTLC backwards along the relevant path).
125 // Alternatively, we can fill an outbound HTLC with a HTLCSource::OutboundRoute indicating this is
126 // our payment, which we can use to decode errors or inform the user that the payment was sent.
128 /// Information about where a received HTLC('s onion) has indicated the HTLC should go.
129 #[derive(Clone)] // See Channel::revoke_and_ack for why, tl;dr: Rust bug
130 #[cfg_attr(test, derive(Debug, PartialEq))]
131 pub enum PendingHTLCRouting {
132 /// An HTLC which should be forwarded on to another node.
134 /// The onion which should be included in the forwarded HTLC, telling the next hop what to
135 /// do with the HTLC.
136 onion_packet: msgs::OnionPacket,
137 /// The short channel ID of the channel which we were instructed to forward this HTLC to.
139 /// This could be a real on-chain SCID, an SCID alias, or some other SCID which has meaning
140 /// to the receiving node, such as one returned from
141 /// [`ChannelManager::get_intercept_scid`] or [`ChannelManager::get_phantom_scid`].
142 short_channel_id: u64, // This should be NonZero<u64> eventually when we bump MSRV
143 /// Set if this HTLC is being forwarded within a blinded path.
144 blinded: Option<BlindedForward>,
146 /// The onion indicates that this is a payment for an invoice (supposedly) generated by us.
148 /// Note that at this point, we have not checked that the invoice being paid was actually
149 /// generated by us, but rather it's claiming to pay an invoice of ours.
151 /// Information about the amount the sender intended to pay and (potential) proof that this
152 /// is a payment for an invoice we generated. This proof of payment is is also used for
153 /// linking MPP parts of a larger payment.
154 payment_data: msgs::FinalOnionHopData,
155 /// Additional data which we (allegedly) instructed the sender to include in the onion.
157 /// For HTLCs received by LDK, this will ultimately be exposed in
158 /// [`Event::PaymentClaimable::onion_fields`] as
159 /// [`RecipientOnionFields::payment_metadata`].
160 payment_metadata: Option<Vec<u8>>,
161 /// The context of the payment included by the recipient in a blinded path, or `None` if a
162 /// blinded path was not used.
164 /// Used in part to determine the [`events::PaymentPurpose`].
165 payment_context: Option<PaymentContext>,
166 /// CLTV expiry of the received HTLC.
168 /// Used to track when we should expire pending HTLCs that go unclaimed.
169 incoming_cltv_expiry: u32,
170 /// If the onion had forwarding instructions to one of our phantom node SCIDs, this will
171 /// provide the onion shared secret used to decrypt the next level of forwarding
173 phantom_shared_secret: Option<[u8; 32]>,
174 /// Custom TLVs which were set by the sender.
176 /// For HTLCs received by LDK, this will ultimately be exposed in
177 /// [`Event::PaymentClaimable::onion_fields`] as
178 /// [`RecipientOnionFields::custom_tlvs`].
179 custom_tlvs: Vec<(u64, Vec<u8>)>,
180 /// Set if this HTLC is the final hop in a multi-hop blinded path.
181 requires_blinded_error: bool,
183 /// The onion indicates that this is for payment to us but which contains the preimage for
184 /// claiming included, and is unrelated to any invoice we'd previously generated (aka a
185 /// "keysend" or "spontaneous" payment).
187 /// Information about the amount the sender intended to pay and possibly a token to
188 /// associate MPP parts of a larger payment.
190 /// This will only be filled in if receiving MPP keysend payments is enabled, and it being
191 /// present will cause deserialization to fail on versions of LDK prior to 0.0.116.
192 payment_data: Option<msgs::FinalOnionHopData>,
193 /// Preimage for this onion payment. This preimage is provided by the sender and will be
194 /// used to settle the spontaneous payment.
195 payment_preimage: PaymentPreimage,
196 /// Additional data which we (allegedly) instructed the sender to include in the onion.
198 /// For HTLCs received by LDK, this will ultimately bubble back up as
199 /// [`RecipientOnionFields::payment_metadata`].
200 payment_metadata: Option<Vec<u8>>,
201 /// CLTV expiry of the received HTLC.
203 /// Used to track when we should expire pending HTLCs that go unclaimed.
204 incoming_cltv_expiry: u32,
205 /// Custom TLVs which were set by the sender.
207 /// For HTLCs received by LDK, these will ultimately bubble back up as
208 /// [`RecipientOnionFields::custom_tlvs`].
209 custom_tlvs: Vec<(u64, Vec<u8>)>,
210 /// Set if this HTLC is the final hop in a multi-hop blinded path.
211 requires_blinded_error: bool,
215 /// Information used to forward or fail this HTLC that is being forwarded within a blinded path.
216 #[derive(Clone, Copy, Debug, Hash, PartialEq, Eq)]
217 pub struct BlindedForward {
218 /// The `blinding_point` that was set in the inbound [`msgs::UpdateAddHTLC`], or in the inbound
219 /// onion payload if we're the introduction node. Useful for calculating the next hop's
220 /// [`msgs::UpdateAddHTLC::blinding_point`].
221 pub inbound_blinding_point: PublicKey,
222 /// If needed, this determines how this HTLC should be failed backwards, based on whether we are
223 /// the introduction node.
224 pub failure: BlindedFailure,
227 impl PendingHTLCRouting {
228 // Used to override the onion failure code and data if the HTLC is blinded.
229 fn blinded_failure(&self) -> Option<BlindedFailure> {
231 Self::Forward { blinded: Some(BlindedForward { failure, .. }), .. } => Some(*failure),
232 Self::Receive { requires_blinded_error: true, .. } => Some(BlindedFailure::FromBlindedNode),
233 Self::ReceiveKeysend { requires_blinded_error: true, .. } => Some(BlindedFailure::FromBlindedNode),
239 /// Information about an incoming HTLC, including the [`PendingHTLCRouting`] describing where it
241 #[derive(Clone)] // See Channel::revoke_and_ack for why, tl;dr: Rust bug
242 #[cfg_attr(test, derive(Debug, PartialEq))]
243 pub struct PendingHTLCInfo {
244 /// Further routing details based on whether the HTLC is being forwarded or received.
245 pub routing: PendingHTLCRouting,
246 /// The onion shared secret we build with the sender used to decrypt the onion.
248 /// This is later used to encrypt failure packets in the event that the HTLC is failed.
249 pub incoming_shared_secret: [u8; 32],
250 /// Hash of the payment preimage, to lock the payment until the receiver releases the preimage.
251 pub payment_hash: PaymentHash,
252 /// Amount received in the incoming HTLC.
254 /// This field was added in LDK 0.0.113 and will be `None` for objects written by prior
256 pub incoming_amt_msat: Option<u64>,
257 /// The amount the sender indicated should be forwarded on to the next hop or amount the sender
258 /// intended for us to receive for received payments.
260 /// If the received amount is less than this for received payments, an intermediary hop has
261 /// attempted to steal some of our funds and we should fail the HTLC (the sender should retry
262 /// it along another path).
264 /// Because nodes can take less than their required fees, and because senders may wish to
265 /// improve their own privacy, this amount may be less than [`Self::incoming_amt_msat`] for
266 /// received payments. In such cases, recipients must handle this HTLC as if it had received
267 /// [`Self::outgoing_amt_msat`].
268 pub outgoing_amt_msat: u64,
269 /// The CLTV the sender has indicated we should set on the forwarded HTLC (or has indicated
270 /// should have been set on the received HTLC for received payments).
271 pub outgoing_cltv_value: u32,
272 /// The fee taken for this HTLC in addition to the standard protocol HTLC fees.
274 /// If this is a payment for forwarding, this is the fee we are taking before forwarding the
277 /// If this is a received payment, this is the fee that our counterparty took.
279 /// This is used to allow LSPs to take fees as a part of payments, without the sender having to
281 pub skimmed_fee_msat: Option<u64>,
284 #[derive(Clone)] // See Channel::revoke_and_ack for why, tl;dr: Rust bug
285 pub(super) enum HTLCFailureMsg {
286 Relay(msgs::UpdateFailHTLC),
287 Malformed(msgs::UpdateFailMalformedHTLC),
290 /// Stores whether we can't forward an HTLC or relevant forwarding info
291 #[derive(Clone)] // See Channel::revoke_and_ack for why, tl;dr: Rust bug
292 pub(super) enum PendingHTLCStatus {
293 Forward(PendingHTLCInfo),
294 Fail(HTLCFailureMsg),
297 #[cfg_attr(test, derive(Clone, Debug, PartialEq))]
298 pub(super) struct PendingAddHTLCInfo {
299 pub(super) forward_info: PendingHTLCInfo,
301 // These fields are produced in `forward_htlcs()` and consumed in
302 // `process_pending_htlc_forwards()` for constructing the
303 // `HTLCSource::PreviousHopData` for failed and forwarded
306 // Note that this may be an outbound SCID alias for the associated channel.
307 prev_short_channel_id: u64,
309 prev_channel_id: ChannelId,
310 prev_funding_outpoint: OutPoint,
311 prev_user_channel_id: u128,
314 #[cfg_attr(test, derive(Clone, Debug, PartialEq))]
315 pub(super) enum HTLCForwardInfo {
316 AddHTLC(PendingAddHTLCInfo),
319 err_packet: msgs::OnionErrorPacket,
324 sha256_of_onion: [u8; 32],
328 /// Whether this blinded HTLC is being failed backwards by the introduction node or a blinded node,
329 /// which determines the failure message that should be used.
330 #[derive(Clone, Copy, Debug, Hash, PartialEq, Eq)]
331 pub enum BlindedFailure {
332 /// This HTLC is being failed backwards by the introduction node, and thus should be failed with
333 /// [`msgs::UpdateFailHTLC`] and error code `0x8000|0x4000|24`.
334 FromIntroductionNode,
335 /// This HTLC is being failed backwards by a blinded node within the path, and thus should be
336 /// failed with [`msgs::UpdateFailMalformedHTLC`] and error code `0x8000|0x4000|24`.
340 /// Tracks the inbound corresponding to an outbound HTLC
341 #[derive(Clone, Debug, Hash, PartialEq, Eq)]
342 pub(crate) struct HTLCPreviousHopData {
343 // Note that this may be an outbound SCID alias for the associated channel.
344 short_channel_id: u64,
345 user_channel_id: Option<u128>,
347 incoming_packet_shared_secret: [u8; 32],
348 phantom_shared_secret: Option<[u8; 32]>,
349 blinded_failure: Option<BlindedFailure>,
350 channel_id: ChannelId,
352 // This field is consumed by `claim_funds_from_hop()` when updating a force-closed backwards
353 // channel with a preimage provided by the forward channel.
358 /// Indicates this incoming onion payload is for the purpose of paying an invoice.
360 /// This is only here for backwards-compatibility in serialization, in the future it can be
361 /// removed, breaking clients running 0.0.106 and earlier.
362 _legacy_hop_data: Option<msgs::FinalOnionHopData>,
364 /// Contains the payer-provided preimage.
365 Spontaneous(PaymentPreimage),
368 /// HTLCs that are to us and can be failed/claimed by the user
369 struct ClaimableHTLC {
370 prev_hop: HTLCPreviousHopData,
372 /// The amount (in msats) of this MPP part
374 /// The amount (in msats) that the sender intended to be sent in this MPP
375 /// part (used for validating total MPP amount)
376 sender_intended_value: u64,
377 onion_payload: OnionPayload,
379 /// The total value received for a payment (sum of all MPP parts if the payment is a MPP).
380 /// Gets set to the amount reported when pushing [`Event::PaymentClaimable`].
381 total_value_received: Option<u64>,
382 /// The sender intended sum total of all MPP parts specified in the onion
384 /// The extra fee our counterparty skimmed off the top of this HTLC.
385 counterparty_skimmed_fee_msat: Option<u64>,
388 impl From<&ClaimableHTLC> for events::ClaimedHTLC {
389 fn from(val: &ClaimableHTLC) -> Self {
390 events::ClaimedHTLC {
391 channel_id: val.prev_hop.channel_id,
392 user_channel_id: val.prev_hop.user_channel_id.unwrap_or(0),
393 cltv_expiry: val.cltv_expiry,
394 value_msat: val.value,
395 counterparty_skimmed_fee_msat: val.counterparty_skimmed_fee_msat.unwrap_or(0),
400 /// A user-provided identifier in [`ChannelManager::send_payment`] used to uniquely identify
401 /// a payment and ensure idempotency in LDK.
403 /// This is not exported to bindings users as we just use [u8; 32] directly
404 #[derive(Hash, Copy, Clone, PartialEq, Eq, Debug)]
405 pub struct PaymentId(pub [u8; Self::LENGTH]);
408 /// Number of bytes in the id.
409 pub const LENGTH: usize = 32;
412 impl Writeable for PaymentId {
413 fn write<W: Writer>(&self, w: &mut W) -> Result<(), io::Error> {
418 impl Readable for PaymentId {
419 fn read<R: Read>(r: &mut R) -> Result<Self, DecodeError> {
420 let buf: [u8; 32] = Readable::read(r)?;
425 impl core::fmt::Display for PaymentId {
426 fn fmt(&self, f: &mut core::fmt::Formatter) -> core::fmt::Result {
427 crate::util::logger::DebugBytes(&self.0).fmt(f)
431 /// An identifier used to uniquely identify an intercepted HTLC to LDK.
433 /// This is not exported to bindings users as we just use [u8; 32] directly
434 #[derive(Hash, Copy, Clone, PartialEq, Eq, Debug)]
435 pub struct InterceptId(pub [u8; 32]);
437 impl Writeable for InterceptId {
438 fn write<W: Writer>(&self, w: &mut W) -> Result<(), io::Error> {
443 impl Readable for InterceptId {
444 fn read<R: Read>(r: &mut R) -> Result<Self, DecodeError> {
445 let buf: [u8; 32] = Readable::read(r)?;
450 #[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
451 /// Uniquely describes an HTLC by its source. Just the guaranteed-unique subset of [`HTLCSource`].
452 pub(crate) enum SentHTLCId {
453 PreviousHopData { short_channel_id: u64, htlc_id: u64 },
454 OutboundRoute { session_priv: [u8; SECRET_KEY_SIZE] },
457 pub(crate) fn from_source(source: &HTLCSource) -> Self {
459 HTLCSource::PreviousHopData(hop_data) => Self::PreviousHopData {
460 short_channel_id: hop_data.short_channel_id,
461 htlc_id: hop_data.htlc_id,
463 HTLCSource::OutboundRoute { session_priv, .. } =>
464 Self::OutboundRoute { session_priv: session_priv.secret_bytes() },
468 impl_writeable_tlv_based_enum!(SentHTLCId,
469 (0, PreviousHopData) => {
470 (0, short_channel_id, required),
471 (2, htlc_id, required),
473 (2, OutboundRoute) => {
474 (0, session_priv, required),
479 /// Tracks the inbound corresponding to an outbound HTLC
480 #[allow(clippy::derive_hash_xor_eq)] // Our Hash is faithful to the data, we just don't have SecretKey::hash
481 #[derive(Clone, Debug, PartialEq, Eq)]
482 pub(crate) enum HTLCSource {
483 PreviousHopData(HTLCPreviousHopData),
486 session_priv: SecretKey,
487 /// Technically we can recalculate this from the route, but we cache it here to avoid
488 /// doing a double-pass on route when we get a failure back
489 first_hop_htlc_msat: u64,
490 payment_id: PaymentId,
493 #[allow(clippy::derive_hash_xor_eq)] // Our Hash is faithful to the data, we just don't have SecretKey::hash
494 impl core::hash::Hash for HTLCSource {
495 fn hash<H: core::hash::Hasher>(&self, hasher: &mut H) {
497 HTLCSource::PreviousHopData(prev_hop_data) => {
499 prev_hop_data.hash(hasher);
501 HTLCSource::OutboundRoute { path, session_priv, payment_id, first_hop_htlc_msat } => {
504 session_priv[..].hash(hasher);
505 payment_id.hash(hasher);
506 first_hop_htlc_msat.hash(hasher);
512 #[cfg(all(feature = "_test_vectors", not(feature = "grind_signatures")))]
514 pub fn dummy() -> Self {
515 HTLCSource::OutboundRoute {
516 path: Path { hops: Vec::new(), blinded_tail: None },
517 session_priv: SecretKey::from_slice(&[1; 32]).unwrap(),
518 first_hop_htlc_msat: 0,
519 payment_id: PaymentId([2; 32]),
523 #[cfg(debug_assertions)]
524 /// Checks whether this HTLCSource could possibly match the given HTLC output in a commitment
525 /// transaction. Useful to ensure different datastructures match up.
526 pub(crate) fn possibly_matches_output(&self, htlc: &super::chan_utils::HTLCOutputInCommitment) -> bool {
527 if let HTLCSource::OutboundRoute { first_hop_htlc_msat, .. } = self {
528 *first_hop_htlc_msat == htlc.amount_msat
530 // There's nothing we can check for forwarded HTLCs
536 /// This enum is used to specify which error data to send to peers when failing back an HTLC
537 /// using [`ChannelManager::fail_htlc_backwards_with_reason`].
539 /// For more info on failure codes, see <https://github.com/lightning/bolts/blob/master/04-onion-routing.md#failure-messages>.
540 #[derive(Clone, Copy)]
541 pub enum FailureCode {
542 /// We had a temporary error processing the payment. Useful if no other error codes fit
543 /// and you want to indicate that the payer may want to retry.
544 TemporaryNodeFailure,
545 /// We have a required feature which was not in this onion. For example, you may require
546 /// some additional metadata that was not provided with this payment.
547 RequiredNodeFeatureMissing,
548 /// You may wish to use this when a `payment_preimage` is unknown, or the CLTV expiry of
549 /// the HTLC is too close to the current block height for safe handling.
550 /// Using this failure code in [`ChannelManager::fail_htlc_backwards_with_reason`] is
551 /// equivalent to calling [`ChannelManager::fail_htlc_backwards`].
552 IncorrectOrUnknownPaymentDetails,
553 /// We failed to process the payload after the onion was decrypted. You may wish to
554 /// use this when receiving custom HTLC TLVs with even type numbers that you don't recognize.
556 /// If available, the tuple data may include the type number and byte offset in the
557 /// decrypted byte stream where the failure occurred.
558 InvalidOnionPayload(Option<(u64, u16)>),
561 impl Into<u16> for FailureCode {
562 fn into(self) -> u16 {
564 FailureCode::TemporaryNodeFailure => 0x2000 | 2,
565 FailureCode::RequiredNodeFeatureMissing => 0x4000 | 0x2000 | 3,
566 FailureCode::IncorrectOrUnknownPaymentDetails => 0x4000 | 15,
567 FailureCode::InvalidOnionPayload(_) => 0x4000 | 22,
572 /// Error type returned across the peer_state mutex boundary. When an Err is generated for a
573 /// Channel, we generally end up with a ChannelError::Close for which we have to close the channel
574 /// immediately (ie with no further calls on it made). Thus, this step happens inside a
575 /// peer_state lock. We then return the set of things that need to be done outside the lock in
576 /// this struct and call handle_error!() on it.
578 struct MsgHandleErrInternal {
579 err: msgs::LightningError,
580 closes_channel: bool,
581 shutdown_finish: Option<(ShutdownResult, Option<msgs::ChannelUpdate>)>,
583 impl MsgHandleErrInternal {
585 fn send_err_msg_no_close(err: String, channel_id: ChannelId) -> Self {
587 err: LightningError {
589 action: msgs::ErrorAction::SendErrorMessage {
590 msg: msgs::ErrorMessage {
596 closes_channel: false,
597 shutdown_finish: None,
601 fn from_no_close(err: msgs::LightningError) -> Self {
602 Self { err, closes_channel: false, shutdown_finish: None }
605 fn from_finish_shutdown(err: String, channel_id: ChannelId, shutdown_res: ShutdownResult, channel_update: Option<msgs::ChannelUpdate>) -> Self {
606 let err_msg = msgs::ErrorMessage { channel_id, data: err.clone() };
607 let action = if shutdown_res.monitor_update.is_some() {
608 // We have a closing `ChannelMonitorUpdate`, which means the channel was funded and we
609 // should disconnect our peer such that we force them to broadcast their latest
610 // commitment upon reconnecting.
611 msgs::ErrorAction::DisconnectPeer { msg: Some(err_msg) }
613 msgs::ErrorAction::SendErrorMessage { msg: err_msg }
616 err: LightningError { err, action },
617 closes_channel: true,
618 shutdown_finish: Some((shutdown_res, channel_update)),
622 fn from_chan_no_close(err: ChannelError, channel_id: ChannelId) -> Self {
625 ChannelError::Warn(msg) => LightningError {
627 action: msgs::ErrorAction::SendWarningMessage {
628 msg: msgs::WarningMessage {
632 log_level: Level::Warn,
635 ChannelError::Ignore(msg) => LightningError {
637 action: msgs::ErrorAction::IgnoreError,
639 ChannelError::Close(msg) => LightningError {
641 action: msgs::ErrorAction::SendErrorMessage {
642 msg: msgs::ErrorMessage {
649 closes_channel: false,
650 shutdown_finish: None,
654 fn closes_channel(&self) -> bool {
659 /// We hold back HTLCs we intend to relay for a random interval greater than this (see
660 /// Event::PendingHTLCsForwardable for the API guidelines indicating how long should be waited).
661 /// This provides some limited amount of privacy. Ideally this would range from somewhere like one
662 /// second to 30 seconds, but people expect lightning to be, you know, kinda fast, sadly.
663 pub(super) const MIN_HTLC_RELAY_HOLDING_CELL_MILLIS: u64 = 100;
665 /// For events which result in both a RevokeAndACK and a CommitmentUpdate, by default they should
666 /// be sent in the order they appear in the return value, however sometimes the order needs to be
667 /// variable at runtime (eg Channel::channel_reestablish needs to re-send messages in the order
668 /// they were originally sent). In those cases, this enum is also returned.
669 #[derive(Clone, PartialEq)]
670 pub(super) enum RAACommitmentOrder {
671 /// Send the CommitmentUpdate messages first
673 /// Send the RevokeAndACK message first
677 /// Information about a payment which is currently being claimed.
678 struct ClaimingPayment {
680 payment_purpose: events::PaymentPurpose,
681 receiver_node_id: PublicKey,
682 htlcs: Vec<events::ClaimedHTLC>,
683 sender_intended_value: Option<u64>,
685 impl_writeable_tlv_based!(ClaimingPayment, {
686 (0, amount_msat, required),
687 (2, payment_purpose, required),
688 (4, receiver_node_id, required),
689 (5, htlcs, optional_vec),
690 (7, sender_intended_value, option),
693 struct ClaimablePayment {
694 purpose: events::PaymentPurpose,
695 onion_fields: Option<RecipientOnionFields>,
696 htlcs: Vec<ClaimableHTLC>,
699 /// Information about claimable or being-claimed payments
700 struct ClaimablePayments {
701 /// Map from payment hash to the payment data and any HTLCs which are to us and can be
702 /// failed/claimed by the user.
704 /// Note that, no consistency guarantees are made about the channels given here actually
705 /// existing anymore by the time you go to read them!
707 /// When adding to the map, [`Self::pending_claiming_payments`] must also be checked to ensure
708 /// we don't get a duplicate payment.
709 claimable_payments: HashMap<PaymentHash, ClaimablePayment>,
711 /// Map from payment hash to the payment data for HTLCs which we have begun claiming, but which
712 /// are waiting on a [`ChannelMonitorUpdate`] to complete in order to be surfaced to the user
713 /// as an [`events::Event::PaymentClaimed`].
714 pending_claiming_payments: HashMap<PaymentHash, ClaimingPayment>,
717 /// Events which we process internally but cannot be processed immediately at the generation site
718 /// usually because we're running pre-full-init. They are handled immediately once we detect we are
719 /// running normally, and specifically must be processed before any other non-background
720 /// [`ChannelMonitorUpdate`]s are applied.
722 enum BackgroundEvent {
723 /// Handle a ChannelMonitorUpdate which closes the channel or for an already-closed channel.
724 /// This is only separated from [`Self::MonitorUpdateRegeneratedOnStartup`] as the
725 /// maybe-non-closing variant needs a public key to handle channel resumption, whereas if the
726 /// channel has been force-closed we do not need the counterparty node_id.
728 /// Note that any such events are lost on shutdown, so in general they must be updates which
729 /// are regenerated on startup.
730 ClosedMonitorUpdateRegeneratedOnStartup((OutPoint, ChannelId, ChannelMonitorUpdate)),
731 /// Handle a ChannelMonitorUpdate which may or may not close the channel and may unblock the
732 /// channel to continue normal operation.
734 /// In general this should be used rather than
735 /// [`Self::ClosedMonitorUpdateRegeneratedOnStartup`], however in cases where the
736 /// `counterparty_node_id` is not available as the channel has closed from a [`ChannelMonitor`]
737 /// error the other variant is acceptable.
739 /// Note that any such events are lost on shutdown, so in general they must be updates which
740 /// are regenerated on startup.
741 MonitorUpdateRegeneratedOnStartup {
742 counterparty_node_id: PublicKey,
743 funding_txo: OutPoint,
744 channel_id: ChannelId,
745 update: ChannelMonitorUpdate
747 /// Some [`ChannelMonitorUpdate`] (s) completed before we were serialized but we still have
748 /// them marked pending, thus we need to run any [`MonitorUpdateCompletionAction`] (s) pending
750 MonitorUpdatesComplete {
751 counterparty_node_id: PublicKey,
752 channel_id: ChannelId,
757 pub(crate) enum MonitorUpdateCompletionAction {
758 /// Indicates that a payment ultimately destined for us was claimed and we should emit an
759 /// [`events::Event::PaymentClaimed`] to the user if we haven't yet generated such an event for
760 /// this payment. Note that this is only best-effort. On restart it's possible such a duplicate
761 /// event can be generated.
762 PaymentClaimed { payment_hash: PaymentHash },
763 /// Indicates an [`events::Event`] should be surfaced to the user and possibly resume the
764 /// operation of another channel.
766 /// This is usually generated when we've forwarded an HTLC and want to block the outbound edge
767 /// from completing a monitor update which removes the payment preimage until the inbound edge
768 /// completes a monitor update containing the payment preimage. In that case, after the inbound
769 /// edge completes, we will surface an [`Event::PaymentForwarded`] as well as unblock the
771 EmitEventAndFreeOtherChannel {
772 event: events::Event,
773 downstream_counterparty_and_funding_outpoint: Option<(PublicKey, OutPoint, ChannelId, RAAMonitorUpdateBlockingAction)>,
775 /// Indicates we should immediately resume the operation of another channel, unless there is
776 /// some other reason why the channel is blocked. In practice this simply means immediately
777 /// removing the [`RAAMonitorUpdateBlockingAction`] provided from the blocking set.
779 /// This is usually generated when we've forwarded an HTLC and want to block the outbound edge
780 /// from completing a monitor update which removes the payment preimage until the inbound edge
781 /// completes a monitor update containing the payment preimage. However, we use this variant
782 /// instead of [`Self::EmitEventAndFreeOtherChannel`] when we discover that the claim was in
783 /// fact duplicative and we simply want to resume the outbound edge channel immediately.
785 /// This variant should thus never be written to disk, as it is processed inline rather than
786 /// stored for later processing.
787 FreeOtherChannelImmediately {
788 downstream_counterparty_node_id: PublicKey,
789 downstream_funding_outpoint: OutPoint,
790 blocking_action: RAAMonitorUpdateBlockingAction,
791 downstream_channel_id: ChannelId,
795 impl_writeable_tlv_based_enum_upgradable!(MonitorUpdateCompletionAction,
796 (0, PaymentClaimed) => { (0, payment_hash, required) },
797 // Note that FreeOtherChannelImmediately should never be written - we were supposed to free
798 // *immediately*. However, for simplicity we implement read/write here.
799 (1, FreeOtherChannelImmediately) => {
800 (0, downstream_counterparty_node_id, required),
801 (2, downstream_funding_outpoint, required),
802 (4, blocking_action, required),
803 // Note that by the time we get past the required read above, downstream_funding_outpoint will be
804 // filled in, so we can safely unwrap it here.
805 (5, downstream_channel_id, (default_value, ChannelId::v1_from_funding_outpoint(downstream_funding_outpoint.0.unwrap()))),
807 (2, EmitEventAndFreeOtherChannel) => {
808 (0, event, upgradable_required),
809 // LDK prior to 0.0.116 did not have this field as the monitor update application order was
810 // required by clients. If we downgrade to something prior to 0.0.116 this may result in
811 // monitor updates which aren't properly blocked or resumed, however that's fine - we don't
812 // support async monitor updates even in LDK 0.0.116 and once we do we'll require no
813 // downgrades to prior versions.
814 (1, downstream_counterparty_and_funding_outpoint, option),
818 #[derive(Clone, Debug, PartialEq, Eq)]
819 pub(crate) enum EventCompletionAction {
820 ReleaseRAAChannelMonitorUpdate {
821 counterparty_node_id: PublicKey,
822 channel_funding_outpoint: OutPoint,
823 channel_id: ChannelId,
826 impl_writeable_tlv_based_enum!(EventCompletionAction,
827 (0, ReleaseRAAChannelMonitorUpdate) => {
828 (0, channel_funding_outpoint, required),
829 (2, counterparty_node_id, required),
830 // Note that by the time we get past the required read above, channel_funding_outpoint will be
831 // filled in, so we can safely unwrap it here.
832 (3, channel_id, (default_value, ChannelId::v1_from_funding_outpoint(channel_funding_outpoint.0.unwrap()))),
836 #[derive(Clone, PartialEq, Eq, Debug)]
837 /// If something is blocked on the completion of an RAA-generated [`ChannelMonitorUpdate`] we track
838 /// the blocked action here. See enum variants for more info.
839 pub(crate) enum RAAMonitorUpdateBlockingAction {
840 /// A forwarded payment was claimed. We block the downstream channel completing its monitor
841 /// update which removes the HTLC preimage until the upstream channel has gotten the preimage
843 ForwardedPaymentInboundClaim {
844 /// The upstream channel ID (i.e. the inbound edge).
845 channel_id: ChannelId,
846 /// The HTLC ID on the inbound edge.
851 impl RAAMonitorUpdateBlockingAction {
852 fn from_prev_hop_data(prev_hop: &HTLCPreviousHopData) -> Self {
853 Self::ForwardedPaymentInboundClaim {
854 channel_id: prev_hop.channel_id,
855 htlc_id: prev_hop.htlc_id,
860 impl_writeable_tlv_based_enum!(RAAMonitorUpdateBlockingAction,
861 (0, ForwardedPaymentInboundClaim) => { (0, channel_id, required), (2, htlc_id, required) }
865 /// State we hold per-peer.
866 pub(super) struct PeerState<SP: Deref> where SP::Target: SignerProvider {
867 /// `channel_id` -> `ChannelPhase`
869 /// Holds all channels within corresponding `ChannelPhase`s where the peer is the counterparty.
870 pub(super) channel_by_id: HashMap<ChannelId, ChannelPhase<SP>>,
871 /// `temporary_channel_id` -> `InboundChannelRequest`.
873 /// When manual channel acceptance is enabled, this holds all unaccepted inbound channels where
874 /// the peer is the counterparty. If the channel is accepted, then the entry in this table is
875 /// removed, and an InboundV1Channel is created and placed in the `inbound_v1_channel_by_id` table. If
876 /// the channel is rejected, then the entry is simply removed.
877 pub(super) inbound_channel_request_by_id: HashMap<ChannelId, InboundChannelRequest>,
878 /// The latest `InitFeatures` we heard from the peer.
879 latest_features: InitFeatures,
880 /// Messages to send to the peer - pushed to in the same lock that they are generated in (except
881 /// for broadcast messages, where ordering isn't as strict).
882 pub(super) pending_msg_events: Vec<MessageSendEvent>,
883 /// Map from Channel IDs to pending [`ChannelMonitorUpdate`]s which have been passed to the
884 /// user but which have not yet completed.
886 /// Note that the channel may no longer exist. For example if the channel was closed but we
887 /// later needed to claim an HTLC which is pending on-chain, we may generate a monitor update
888 /// for a missing channel.
889 in_flight_monitor_updates: BTreeMap<OutPoint, Vec<ChannelMonitorUpdate>>,
890 /// Map from a specific channel to some action(s) that should be taken when all pending
891 /// [`ChannelMonitorUpdate`]s for the channel complete updating.
893 /// Note that because we generally only have one entry here a HashMap is pretty overkill. A
894 /// BTreeMap currently stores more than ten elements per leaf node, so even up to a few
895 /// channels with a peer this will just be one allocation and will amount to a linear list of
896 /// channels to walk, avoiding the whole hashing rigmarole.
898 /// Note that the channel may no longer exist. For example, if a channel was closed but we
899 /// later needed to claim an HTLC which is pending on-chain, we may generate a monitor update
900 /// for a missing channel. While a malicious peer could construct a second channel with the
901 /// same `temporary_channel_id` (or final `channel_id` in the case of 0conf channels or prior
902 /// to funding appearing on-chain), the downstream `ChannelMonitor` set is required to ensure
903 /// duplicates do not occur, so such channels should fail without a monitor update completing.
904 monitor_update_blocked_actions: BTreeMap<ChannelId, Vec<MonitorUpdateCompletionAction>>,
905 /// If another channel's [`ChannelMonitorUpdate`] needs to complete before a channel we have
906 /// with this peer can complete an RAA [`ChannelMonitorUpdate`] (e.g. because the RAA update
907 /// will remove a preimage that needs to be durably in an upstream channel first), we put an
908 /// entry here to note that the channel with the key's ID is blocked on a set of actions.
909 actions_blocking_raa_monitor_updates: BTreeMap<ChannelId, Vec<RAAMonitorUpdateBlockingAction>>,
910 /// The peer is currently connected (i.e. we've seen a
911 /// [`ChannelMessageHandler::peer_connected`] and no corresponding
912 /// [`ChannelMessageHandler::peer_disconnected`].
913 pub is_connected: bool,
916 impl <SP: Deref> PeerState<SP> where SP::Target: SignerProvider {
917 /// Indicates that a peer meets the criteria where we're ok to remove it from our storage.
918 /// If true is passed for `require_disconnected`, the function will return false if we haven't
919 /// disconnected from the node already, ie. `PeerState::is_connected` is set to `true`.
920 fn ok_to_remove(&self, require_disconnected: bool) -> bool {
921 if require_disconnected && self.is_connected {
924 !self.channel_by_id.iter().any(|(_, phase)|
926 ChannelPhase::Funded(_) | ChannelPhase::UnfundedOutboundV1(_) => true,
927 ChannelPhase::UnfundedInboundV1(_) => false,
928 #[cfg(any(dual_funding, splicing))]
929 ChannelPhase::UnfundedOutboundV2(_) => true,
930 #[cfg(any(dual_funding, splicing))]
931 ChannelPhase::UnfundedInboundV2(_) => false,
934 && self.monitor_update_blocked_actions.is_empty()
935 && self.in_flight_monitor_updates.is_empty()
938 // Returns a count of all channels we have with this peer, including unfunded channels.
939 fn total_channel_count(&self) -> usize {
940 self.channel_by_id.len() + self.inbound_channel_request_by_id.len()
943 // Returns a bool indicating if the given `channel_id` matches a channel we have with this peer.
944 fn has_channel(&self, channel_id: &ChannelId) -> bool {
945 self.channel_by_id.contains_key(channel_id) ||
946 self.inbound_channel_request_by_id.contains_key(channel_id)
950 /// A not-yet-accepted inbound (from counterparty) channel. Once
951 /// accepted, the parameters will be used to construct a channel.
952 pub(super) struct InboundChannelRequest {
953 /// The original OpenChannel message.
954 pub open_channel_msg: msgs::OpenChannel,
955 /// The number of ticks remaining before the request expires.
956 pub ticks_remaining: i32,
959 /// The number of ticks that may elapse while we're waiting for an unaccepted inbound channel to be
960 /// accepted. An unaccepted channel that exceeds this limit will be abandoned.
961 const UNACCEPTED_INBOUND_CHANNEL_AGE_LIMIT_TICKS: i32 = 2;
963 /// Stores a PaymentSecret and any other data we may need to validate an inbound payment is
964 /// actually ours and not some duplicate HTLC sent to us by a node along the route.
966 /// For users who don't want to bother doing their own payment preimage storage, we also store that
969 /// Note that this struct will be removed entirely soon, in favor of storing no inbound payment data
970 /// and instead encoding it in the payment secret.
971 struct PendingInboundPayment {
972 /// The payment secret that the sender must use for us to accept this payment
973 payment_secret: PaymentSecret,
974 /// Time at which this HTLC expires - blocks with a header time above this value will result in
975 /// this payment being removed.
977 /// Arbitrary identifier the user specifies (or not)
978 user_payment_id: u64,
979 // Other required attributes of the payment, optionally enforced:
980 payment_preimage: Option<PaymentPreimage>,
981 min_value_msat: Option<u64>,
984 /// [`SimpleArcChannelManager`] is useful when you need a [`ChannelManager`] with a static lifetime, e.g.
985 /// when you're using `lightning-net-tokio` (since `tokio::spawn` requires parameters with static
986 /// lifetimes). Other times you can afford a reference, which is more efficient, in which case
987 /// [`SimpleRefChannelManager`] is the more appropriate type. Defining these type aliases prevents
988 /// issues such as overly long function definitions. Note that the `ChannelManager` can take any type
989 /// that implements [`NodeSigner`], [`EntropySource`], and [`SignerProvider`] for its keys manager,
990 /// or, respectively, [`Router`] for its router, but this type alias chooses the concrete types
991 /// of [`KeysManager`] and [`DefaultRouter`].
993 /// This is not exported to bindings users as type aliases aren't supported in most languages.
994 #[cfg(not(c_bindings))]
995 pub type SimpleArcChannelManager<M, T, F, L> = ChannelManager<
1003 Arc<NetworkGraph<Arc<L>>>,
1006 Arc<RwLock<ProbabilisticScorer<Arc<NetworkGraph<Arc<L>>>, Arc<L>>>>,
1007 ProbabilisticScoringFeeParameters,
1008 ProbabilisticScorer<Arc<NetworkGraph<Arc<L>>>, Arc<L>>,
1013 /// [`SimpleRefChannelManager`] is a type alias for a ChannelManager reference, and is the reference
1014 /// counterpart to the [`SimpleArcChannelManager`] type alias. Use this type by default when you don't
1015 /// need a ChannelManager with a static lifetime. You'll need a static lifetime in cases such as
1016 /// usage of lightning-net-tokio (since `tokio::spawn` requires parameters with static lifetimes).
1017 /// But if this is not necessary, using a reference is more efficient. Defining these type aliases
1018 /// issues such as overly long function definitions. Note that the ChannelManager can take any type
1019 /// that implements [`NodeSigner`], [`EntropySource`], and [`SignerProvider`] for its keys manager,
1020 /// or, respectively, [`Router`] for its router, but this type alias chooses the concrete types
1021 /// of [`KeysManager`] and [`DefaultRouter`].
1023 /// This is not exported to bindings users as type aliases aren't supported in most languages.
1024 #[cfg(not(c_bindings))]
1025 pub type SimpleRefChannelManager<'a, 'b, 'c, 'd, 'e, 'f, 'g, 'h, M, T, F, L> =
1034 &'f NetworkGraph<&'g L>,
1037 &'h RwLock<ProbabilisticScorer<&'f NetworkGraph<&'g L>, &'g L>>,
1038 ProbabilisticScoringFeeParameters,
1039 ProbabilisticScorer<&'f NetworkGraph<&'g L>, &'g L>
1044 /// A trivial trait which describes any [`ChannelManager`].
1046 /// This is not exported to bindings users as general cover traits aren't useful in other
1048 pub trait AChannelManager {
1049 /// A type implementing [`chain::Watch`].
1050 type Watch: chain::Watch<Self::Signer> + ?Sized;
1051 /// A type that may be dereferenced to [`Self::Watch`].
1052 type M: Deref<Target = Self::Watch>;
1053 /// A type implementing [`BroadcasterInterface`].
1054 type Broadcaster: BroadcasterInterface + ?Sized;
1055 /// A type that may be dereferenced to [`Self::Broadcaster`].
1056 type T: Deref<Target = Self::Broadcaster>;
1057 /// A type implementing [`EntropySource`].
1058 type EntropySource: EntropySource + ?Sized;
1059 /// A type that may be dereferenced to [`Self::EntropySource`].
1060 type ES: Deref<Target = Self::EntropySource>;
1061 /// A type implementing [`NodeSigner`].
1062 type NodeSigner: NodeSigner + ?Sized;
1063 /// A type that may be dereferenced to [`Self::NodeSigner`].
1064 type NS: Deref<Target = Self::NodeSigner>;
1065 /// A type implementing [`EcdsaChannelSigner`].
1066 type Signer: EcdsaChannelSigner + Sized;
1067 /// A type implementing [`SignerProvider`] for [`Self::Signer`].
1068 type SignerProvider: SignerProvider<EcdsaSigner= Self::Signer> + ?Sized;
1069 /// A type that may be dereferenced to [`Self::SignerProvider`].
1070 type SP: Deref<Target = Self::SignerProvider>;
1071 /// A type implementing [`FeeEstimator`].
1072 type FeeEstimator: FeeEstimator + ?Sized;
1073 /// A type that may be dereferenced to [`Self::FeeEstimator`].
1074 type F: Deref<Target = Self::FeeEstimator>;
1075 /// A type implementing [`Router`].
1076 type Router: Router + ?Sized;
1077 /// A type that may be dereferenced to [`Self::Router`].
1078 type R: Deref<Target = Self::Router>;
1079 /// A type implementing [`Logger`].
1080 type Logger: Logger + ?Sized;
1081 /// A type that may be dereferenced to [`Self::Logger`].
1082 type L: Deref<Target = Self::Logger>;
1083 /// Returns a reference to the actual [`ChannelManager`] object.
1084 fn get_cm(&self) -> &ChannelManager<Self::M, Self::T, Self::ES, Self::NS, Self::SP, Self::F, Self::R, Self::L>;
1087 impl<M: Deref, T: Deref, ES: Deref, NS: Deref, SP: Deref, F: Deref, R: Deref, L: Deref> AChannelManager
1088 for ChannelManager<M, T, ES, NS, SP, F, R, L>
1090 M::Target: chain::Watch<<SP::Target as SignerProvider>::EcdsaSigner>,
1091 T::Target: BroadcasterInterface,
1092 ES::Target: EntropySource,
1093 NS::Target: NodeSigner,
1094 SP::Target: SignerProvider,
1095 F::Target: FeeEstimator,
1099 type Watch = M::Target;
1101 type Broadcaster = T::Target;
1103 type EntropySource = ES::Target;
1105 type NodeSigner = NS::Target;
1107 type Signer = <SP::Target as SignerProvider>::EcdsaSigner;
1108 type SignerProvider = SP::Target;
1110 type FeeEstimator = F::Target;
1112 type Router = R::Target;
1114 type Logger = L::Target;
1116 fn get_cm(&self) -> &ChannelManager<M, T, ES, NS, SP, F, R, L> { self }
1119 /// A lightning node's channel state machine and payment management logic, which facilitates
1120 /// sending, forwarding, and receiving payments through lightning channels.
1122 /// [`ChannelManager`] is parameterized by a number of components to achieve this.
1123 /// - [`chain::Watch`] (typically [`ChainMonitor`]) for on-chain monitoring and enforcement of each
1125 /// - [`BroadcasterInterface`] for broadcasting transactions related to opening, funding, and
1126 /// closing channels
1127 /// - [`EntropySource`] for providing random data needed for cryptographic operations
1128 /// - [`NodeSigner`] for cryptographic operations scoped to the node
1129 /// - [`SignerProvider`] for providing signers whose operations are scoped to individual channels
1130 /// - [`FeeEstimator`] to determine transaction fee rates needed to have a transaction mined in a
1132 /// - [`Router`] for finding payment paths when initiating and retrying payments
1133 /// - [`Logger`] for logging operational information of varying degrees
1135 /// Additionally, it implements the following traits:
1136 /// - [`ChannelMessageHandler`] to handle off-chain channel activity from peers
1137 /// - [`MessageSendEventsProvider`] to similarly send such messages to peers
1138 /// - [`OffersMessageHandler`] for BOLT 12 message handling and sending
1139 /// - [`EventsProvider`] to generate user-actionable [`Event`]s
1140 /// - [`chain::Listen`] and [`chain::Confirm`] for notification of on-chain activity
1142 /// Thus, [`ChannelManager`] is typically used to parameterize a [`MessageHandler`] and an
1143 /// [`OnionMessenger`]. The latter is required to support BOLT 12 functionality.
1145 /// # `ChannelManager` vs `ChannelMonitor`
1147 /// It's important to distinguish between the *off-chain* management and *on-chain* enforcement of
1148 /// lightning channels. [`ChannelManager`] exchanges messages with peers to manage the off-chain
1149 /// state of each channel. During this process, it generates a [`ChannelMonitor`] for each channel
1150 /// and a [`ChannelMonitorUpdate`] for each relevant change, notifying its parameterized
1151 /// [`chain::Watch`] of them.
1153 /// An implementation of [`chain::Watch`], such as [`ChainMonitor`], is responsible for aggregating
1154 /// these [`ChannelMonitor`]s and applying any [`ChannelMonitorUpdate`]s to them. It then monitors
1155 /// for any pertinent on-chain activity, enforcing claims as needed.
1157 /// This division of off-chain management and on-chain enforcement allows for interesting node
1158 /// setups. For instance, on-chain enforcement could be moved to a separate host or have added
1159 /// redundancy, possibly as a watchtower. See [`chain::Watch`] for the relevant interface.
1161 /// # Initialization
1163 /// Use [`ChannelManager::new`] with the most recent [`BlockHash`] when creating a fresh instance.
1164 /// Otherwise, if restarting, construct [`ChannelManagerReadArgs`] with the necessary parameters and
1165 /// references to any deserialized [`ChannelMonitor`]s that were previously persisted. Use this to
1166 /// deserialize the [`ChannelManager`] and feed it any new chain data since it was last online, as
1167 /// detailed in the [`ChannelManagerReadArgs`] documentation.
1170 /// use bitcoin::BlockHash;
1171 /// use bitcoin::network::constants::Network;
1172 /// use lightning::chain::BestBlock;
1173 /// # use lightning::chain::channelmonitor::ChannelMonitor;
1174 /// use lightning::ln::channelmanager::{ChainParameters, ChannelManager, ChannelManagerReadArgs};
1175 /// # use lightning::routing::gossip::NetworkGraph;
1176 /// use lightning::util::config::UserConfig;
1177 /// use lightning::util::ser::ReadableArgs;
1179 /// # fn read_channel_monitors() -> Vec<ChannelMonitor<lightning::sign::InMemorySigner>> { vec![] }
1182 /// # L: lightning::util::logger::Logger,
1183 /// # ES: lightning::sign::EntropySource,
1184 /// # S: for <'b> lightning::routing::scoring::LockableScore<'b, ScoreLookUp = SL>,
1185 /// # SL: lightning::routing::scoring::ScoreLookUp<ScoreParams = SP>,
1187 /// # R: lightning::io::Read,
1189 /// # fee_estimator: &dyn lightning::chain::chaininterface::FeeEstimator,
1190 /// # chain_monitor: &dyn lightning::chain::Watch<lightning::sign::InMemorySigner>,
1191 /// # tx_broadcaster: &dyn lightning::chain::chaininterface::BroadcasterInterface,
1192 /// # router: &lightning::routing::router::DefaultRouter<&NetworkGraph<&'a L>, &'a L, &ES, &S, SP, SL>,
1194 /// # entropy_source: &ES,
1195 /// # node_signer: &dyn lightning::sign::NodeSigner,
1196 /// # signer_provider: &lightning::sign::DynSignerProvider,
1197 /// # best_block: lightning::chain::BestBlock,
1198 /// # current_timestamp: u32,
1199 /// # mut reader: R,
1200 /// # ) -> Result<(), lightning::ln::msgs::DecodeError> {
1201 /// // Fresh start with no channels
1202 /// let params = ChainParameters {
1203 /// network: Network::Bitcoin,
1206 /// let default_config = UserConfig::default();
1207 /// let channel_manager = ChannelManager::new(
1208 /// fee_estimator, chain_monitor, tx_broadcaster, router, logger, entropy_source, node_signer,
1209 /// signer_provider, default_config, params, current_timestamp
1212 /// // Restart from deserialized data
1213 /// let mut channel_monitors = read_channel_monitors();
1214 /// let args = ChannelManagerReadArgs::new(
1215 /// entropy_source, node_signer, signer_provider, fee_estimator, chain_monitor, tx_broadcaster,
1216 /// router, logger, default_config, channel_monitors.iter_mut().collect()
1218 /// let (block_hash, channel_manager) =
1219 /// <(BlockHash, ChannelManager<_, _, _, _, _, _, _, _>)>::read(&mut reader, args)?;
1221 /// // Update the ChannelManager and ChannelMonitors with the latest chain data
1224 /// // Move the monitors to the ChannelManager's chain::Watch parameter
1225 /// for monitor in channel_monitors {
1226 /// chain_monitor.watch_channel(monitor.get_funding_txo().0, monitor);
1234 /// The following is required for [`ChannelManager`] to function properly:
1235 /// - Handle messages from peers using its [`ChannelMessageHandler`] implementation (typically
1236 /// called by [`PeerManager::read_event`] when processing network I/O)
1237 /// - Send messages to peers obtained via its [`MessageSendEventsProvider`] implementation
1238 /// (typically initiated when [`PeerManager::process_events`] is called)
1239 /// - Feed on-chain activity using either its [`chain::Listen`] or [`chain::Confirm`] implementation
1240 /// as documented by those traits
1241 /// - Perform any periodic channel and payment checks by calling [`timer_tick_occurred`] roughly
1243 /// - Persist to disk whenever [`get_and_clear_needs_persistence`] returns `true` using a
1244 /// [`Persister`] such as a [`KVStore`] implementation
1245 /// - Handle [`Event`]s obtained via its [`EventsProvider`] implementation
1247 /// The [`Future`] returned by [`get_event_or_persistence_needed_future`] is useful in determining
1248 /// when the last two requirements need to be checked.
1250 /// The [`lightning-block-sync`] and [`lightning-transaction-sync`] crates provide utilities that
1251 /// simplify feeding in on-chain activity using the [`chain::Listen`] and [`chain::Confirm`] traits,
1252 /// respectively. The remaining requirements can be met using the [`lightning-background-processor`]
1253 /// crate. For languages other than Rust, the availability of similar utilities may vary.
1257 /// [`ChannelManager`]'s primary function involves managing a channel state. Without channels,
1258 /// payments can't be sent. Use [`list_channels`] or [`list_usable_channels`] for a snapshot of the
1259 /// currently open channels.
1262 /// # use lightning::ln::channelmanager::AChannelManager;
1264 /// # fn example<T: AChannelManager>(channel_manager: T) {
1265 /// # let channel_manager = channel_manager.get_cm();
1266 /// let channels = channel_manager.list_usable_channels();
1267 /// for details in channels {
1268 /// println!("{:?}", details);
1273 /// Each channel is identified using a [`ChannelId`], which will change throughout the channel's
1274 /// life cycle. Additionally, channels are assigned a `user_channel_id`, which is given in
1275 /// [`Event`]s associated with the channel and serves as a fixed identifier but is otherwise unused
1276 /// by [`ChannelManager`].
1278 /// ## Opening Channels
1280 /// To an open a channel with a peer, call [`create_channel`]. This will initiate the process of
1281 /// opening an outbound channel, which requires self-funding when handling
1282 /// [`Event::FundingGenerationReady`].
1285 /// # use bitcoin::{ScriptBuf, Transaction};
1286 /// # use bitcoin::secp256k1::PublicKey;
1287 /// # use lightning::ln::channelmanager::AChannelManager;
1288 /// # use lightning::events::{Event, EventsProvider};
1290 /// # trait Wallet {
1291 /// # fn create_funding_transaction(
1292 /// # &self, _amount_sats: u64, _output_script: ScriptBuf
1293 /// # ) -> Transaction;
1296 /// # fn example<T: AChannelManager, W: Wallet>(channel_manager: T, wallet: W, peer_id: PublicKey) {
1297 /// # let channel_manager = channel_manager.get_cm();
1298 /// let value_sats = 1_000_000;
1299 /// let push_msats = 10_000_000;
1300 /// match channel_manager.create_channel(peer_id, value_sats, push_msats, 42, None, None) {
1301 /// Ok(channel_id) => println!("Opening channel {}", channel_id),
1302 /// Err(e) => println!("Error opening channel: {:?}", e),
1305 /// // On the event processing thread once the peer has responded
1306 /// channel_manager.process_pending_events(&|event| match event {
1307 /// Event::FundingGenerationReady {
1308 /// temporary_channel_id, counterparty_node_id, channel_value_satoshis, output_script,
1309 /// user_channel_id, ..
1311 /// assert_eq!(user_channel_id, 42);
1312 /// let funding_transaction = wallet.create_funding_transaction(
1313 /// channel_value_satoshis, output_script
1315 /// match channel_manager.funding_transaction_generated(
1316 /// &temporary_channel_id, &counterparty_node_id, funding_transaction
1318 /// Ok(()) => println!("Funding channel {}", temporary_channel_id),
1319 /// Err(e) => println!("Error funding channel {}: {:?}", temporary_channel_id, e),
1322 /// Event::ChannelPending { channel_id, user_channel_id, former_temporary_channel_id, .. } => {
1323 /// assert_eq!(user_channel_id, 42);
1325 /// "Channel {} now {} pending (funding transaction has been broadcasted)", channel_id,
1326 /// former_temporary_channel_id.unwrap()
1329 /// Event::ChannelReady { channel_id, user_channel_id, .. } => {
1330 /// assert_eq!(user_channel_id, 42);
1331 /// println!("Channel {} ready", channel_id);
1339 /// ## Accepting Channels
1341 /// Inbound channels are initiated by peers and are automatically accepted unless [`ChannelManager`]
1342 /// has [`UserConfig::manually_accept_inbound_channels`] set. In that case, the channel may be
1343 /// either accepted or rejected when handling [`Event::OpenChannelRequest`].
1346 /// # use bitcoin::secp256k1::PublicKey;
1347 /// # use lightning::ln::channelmanager::AChannelManager;
1348 /// # use lightning::events::{Event, EventsProvider};
1350 /// # fn is_trusted(counterparty_node_id: PublicKey) -> bool {
1352 /// # unimplemented!()
1355 /// # fn example<T: AChannelManager>(channel_manager: T) {
1356 /// # let channel_manager = channel_manager.get_cm();
1357 /// channel_manager.process_pending_events(&|event| match event {
1358 /// Event::OpenChannelRequest { temporary_channel_id, counterparty_node_id, .. } => {
1359 /// if !is_trusted(counterparty_node_id) {
1360 /// match channel_manager.force_close_without_broadcasting_txn(
1361 /// &temporary_channel_id, &counterparty_node_id
1363 /// Ok(()) => println!("Rejecting channel {}", temporary_channel_id),
1364 /// Err(e) => println!("Error rejecting channel {}: {:?}", temporary_channel_id, e),
1369 /// let user_channel_id = 43;
1370 /// match channel_manager.accept_inbound_channel(
1371 /// &temporary_channel_id, &counterparty_node_id, user_channel_id
1373 /// Ok(()) => println!("Accepting channel {}", temporary_channel_id),
1374 /// Err(e) => println!("Error accepting channel {}: {:?}", temporary_channel_id, e),
1383 /// ## Closing Channels
1385 /// There are two ways to close a channel: either cooperatively using [`close_channel`] or
1386 /// unilaterally using [`force_close_broadcasting_latest_txn`]. The former is ideal as it makes for
1387 /// lower fees and immediate access to funds. However, the latter may be necessary if the
1388 /// counterparty isn't behaving properly or has gone offline. [`Event::ChannelClosed`] is generated
1389 /// once the channel has been closed successfully.
1392 /// # use bitcoin::secp256k1::PublicKey;
1393 /// # use lightning::ln::types::ChannelId;
1394 /// # use lightning::ln::channelmanager::AChannelManager;
1395 /// # use lightning::events::{Event, EventsProvider};
1397 /// # fn example<T: AChannelManager>(
1398 /// # channel_manager: T, channel_id: ChannelId, counterparty_node_id: PublicKey
1400 /// # let channel_manager = channel_manager.get_cm();
1401 /// match channel_manager.close_channel(&channel_id, &counterparty_node_id) {
1402 /// Ok(()) => println!("Closing channel {}", channel_id),
1403 /// Err(e) => println!("Error closing channel {}: {:?}", channel_id, e),
1406 /// // On the event processing thread
1407 /// channel_manager.process_pending_events(&|event| match event {
1408 /// Event::ChannelClosed { channel_id, user_channel_id, .. } => {
1409 /// assert_eq!(user_channel_id, 42);
1410 /// println!("Channel {} closed", channel_id);
1420 /// [`ChannelManager`] is responsible for sending, forwarding, and receiving payments through its
1421 /// channels. A payment is typically initiated from a [BOLT 11] invoice or a [BOLT 12] offer, though
1422 /// spontaneous (i.e., keysend) payments are also possible. Incoming payments don't require
1423 /// maintaining any additional state as [`ChannelManager`] can reconstruct the [`PaymentPreimage`]
1424 /// from the [`PaymentSecret`]. Sending payments, however, require tracking in order to retry failed
1427 /// After a payment is initiated, it will appear in [`list_recent_payments`] until a short time
1428 /// after either an [`Event::PaymentSent`] or [`Event::PaymentFailed`] is handled. Failed HTLCs
1429 /// for a payment will be retried according to the payment's [`Retry`] strategy or until
1430 /// [`abandon_payment`] is called.
1432 /// ## BOLT 11 Invoices
1434 /// The [`lightning-invoice`] crate is useful for creating BOLT 11 invoices. Specifically, use the
1435 /// functions in its `utils` module for constructing invoices that are compatible with
1436 /// [`ChannelManager`]. These functions serve as a convenience for building invoices with the
1437 /// [`PaymentHash`] and [`PaymentSecret`] returned from [`create_inbound_payment`]. To provide your
1438 /// own [`PaymentHash`], use [`create_inbound_payment_for_hash`] or the corresponding functions in
1439 /// the [`lightning-invoice`] `utils` module.
1441 /// [`ChannelManager`] generates an [`Event::PaymentClaimable`] once the full payment has been
1442 /// received. Call [`claim_funds`] to release the [`PaymentPreimage`], which in turn will result in
1443 /// an [`Event::PaymentClaimed`].
1446 /// # use lightning::events::{Event, EventsProvider, PaymentPurpose};
1447 /// # use lightning::ln::channelmanager::AChannelManager;
1449 /// # fn example<T: AChannelManager>(channel_manager: T) {
1450 /// # let channel_manager = channel_manager.get_cm();
1451 /// // Or use utils::create_invoice_from_channelmanager
1452 /// let known_payment_hash = match channel_manager.create_inbound_payment(
1453 /// Some(10_000_000), 3600, None
1455 /// Ok((payment_hash, _payment_secret)) => {
1456 /// println!("Creating inbound payment {}", payment_hash);
1459 /// Err(()) => panic!("Error creating inbound payment"),
1462 /// // On the event processing thread
1463 /// channel_manager.process_pending_events(&|event| match event {
1464 /// Event::PaymentClaimable { payment_hash, purpose, .. } => match purpose {
1465 /// PaymentPurpose::Bolt11InvoicePayment { payment_preimage: Some(payment_preimage), .. } => {
1466 /// assert_eq!(payment_hash, known_payment_hash);
1467 /// println!("Claiming payment {}", payment_hash);
1468 /// channel_manager.claim_funds(payment_preimage);
1470 /// PaymentPurpose::Bolt11InvoicePayment { payment_preimage: None, .. } => {
1471 /// println!("Unknown payment hash: {}", payment_hash);
1473 /// PaymentPurpose::SpontaneousPayment(payment_preimage) => {
1474 /// assert_ne!(payment_hash, known_payment_hash);
1475 /// println!("Claiming spontaneous payment {}", payment_hash);
1476 /// channel_manager.claim_funds(payment_preimage);
1481 /// Event::PaymentClaimed { payment_hash, amount_msat, .. } => {
1482 /// assert_eq!(payment_hash, known_payment_hash);
1483 /// println!("Claimed {} msats", amount_msat);
1491 /// For paying an invoice, [`lightning-invoice`] provides a `payment` module with convenience
1492 /// functions for use with [`send_payment`].
1495 /// # use lightning::events::{Event, EventsProvider};
1496 /// # use lightning::ln::types::PaymentHash;
1497 /// # use lightning::ln::channelmanager::{AChannelManager, PaymentId, RecentPaymentDetails, RecipientOnionFields, Retry};
1498 /// # use lightning::routing::router::RouteParameters;
1500 /// # fn example<T: AChannelManager>(
1501 /// # channel_manager: T, payment_hash: PaymentHash, recipient_onion: RecipientOnionFields,
1502 /// # route_params: RouteParameters, retry: Retry
1504 /// # let channel_manager = channel_manager.get_cm();
1505 /// // let (payment_hash, recipient_onion, route_params) =
1506 /// // payment::payment_parameters_from_invoice(&invoice);
1507 /// let payment_id = PaymentId([42; 32]);
1508 /// match channel_manager.send_payment(
1509 /// payment_hash, recipient_onion, payment_id, route_params, retry
1511 /// Ok(()) => println!("Sending payment with hash {}", payment_hash),
1512 /// Err(e) => println!("Failed sending payment with hash {}: {:?}", payment_hash, e),
1515 /// let expected_payment_id = payment_id;
1516 /// let expected_payment_hash = payment_hash;
1518 /// channel_manager.list_recent_payments().iter().find(|details| matches!(
1520 /// RecentPaymentDetails::Pending {
1521 /// payment_id: expected_payment_id,
1522 /// payment_hash: expected_payment_hash,
1528 /// // On the event processing thread
1529 /// channel_manager.process_pending_events(&|event| match event {
1530 /// Event::PaymentSent { payment_hash, .. } => println!("Paid {}", payment_hash),
1531 /// Event::PaymentFailed { payment_hash, .. } => println!("Failed paying {}", payment_hash),
1538 /// ## BOLT 12 Offers
1540 /// The [`offers`] module is useful for creating BOLT 12 offers. An [`Offer`] is a precursor to a
1541 /// [`Bolt12Invoice`], which must first be requested by the payer. The interchange of these messages
1542 /// as defined in the specification is handled by [`ChannelManager`] and its implementation of
1543 /// [`OffersMessageHandler`]. However, this only works with an [`Offer`] created using a builder
1544 /// returned by [`create_offer_builder`]. With this approach, BOLT 12 offers and invoices are
1545 /// stateless just as BOLT 11 invoices are.
1548 /// # use lightning::events::{Event, EventsProvider, PaymentPurpose};
1549 /// # use lightning::ln::channelmanager::AChannelManager;
1550 /// # use lightning::offers::parse::Bolt12SemanticError;
1552 /// # fn example<T: AChannelManager>(channel_manager: T) -> Result<(), Bolt12SemanticError> {
1553 /// # let channel_manager = channel_manager.get_cm();
1554 /// let offer = channel_manager
1555 /// .create_offer_builder()?
1557 /// # // Needed for compiling for c_bindings
1558 /// # let builder: lightning::offers::offer::OfferBuilder<_, _> = offer.into();
1559 /// # let offer = builder
1560 /// .description("coffee".to_string())
1561 /// .amount_msats(10_000_000)
1563 /// let bech32_offer = offer.to_string();
1565 /// // On the event processing thread
1566 /// channel_manager.process_pending_events(&|event| match event {
1567 /// Event::PaymentClaimable { payment_hash, purpose, .. } => match purpose {
1568 /// PaymentPurpose::Bolt12OfferPayment { payment_preimage: Some(payment_preimage), .. } => {
1569 /// println!("Claiming payment {}", payment_hash);
1570 /// channel_manager.claim_funds(payment_preimage);
1572 /// PaymentPurpose::Bolt12OfferPayment { payment_preimage: None, .. } => {
1573 /// println!("Unknown payment hash: {}", payment_hash);
1578 /// Event::PaymentClaimed { payment_hash, amount_msat, .. } => {
1579 /// println!("Claimed {} msats", amount_msat);
1588 /// Use [`pay_for_offer`] to initiated payment, which sends an [`InvoiceRequest`] for an [`Offer`]
1589 /// and pays the [`Bolt12Invoice`] response. In addition to success and failure events,
1590 /// [`ChannelManager`] may also generate an [`Event::InvoiceRequestFailed`].
1593 /// # use lightning::events::{Event, EventsProvider};
1594 /// # use lightning::ln::channelmanager::{AChannelManager, PaymentId, RecentPaymentDetails, Retry};
1595 /// # use lightning::offers::offer::Offer;
1597 /// # fn example<T: AChannelManager>(
1598 /// # channel_manager: T, offer: &Offer, quantity: Option<u64>, amount_msats: Option<u64>,
1599 /// # payer_note: Option<String>, retry: Retry, max_total_routing_fee_msat: Option<u64>
1601 /// # let channel_manager = channel_manager.get_cm();
1602 /// let payment_id = PaymentId([42; 32]);
1603 /// match channel_manager.pay_for_offer(
1604 /// offer, quantity, amount_msats, payer_note, payment_id, retry, max_total_routing_fee_msat
1606 /// Ok(()) => println!("Requesting invoice for offer"),
1607 /// Err(e) => println!("Unable to request invoice for offer: {:?}", e),
1610 /// // First the payment will be waiting on an invoice
1611 /// let expected_payment_id = payment_id;
1613 /// channel_manager.list_recent_payments().iter().find(|details| matches!(
1615 /// RecentPaymentDetails::AwaitingInvoice { payment_id: expected_payment_id }
1619 /// // Once the invoice is received, a payment will be sent
1621 /// channel_manager.list_recent_payments().iter().find(|details| matches!(
1623 /// RecentPaymentDetails::Pending { payment_id: expected_payment_id, .. }
1627 /// // On the event processing thread
1628 /// channel_manager.process_pending_events(&|event| match event {
1629 /// Event::PaymentSent { payment_id: Some(payment_id), .. } => println!("Paid {}", payment_id),
1630 /// Event::PaymentFailed { payment_id, .. } => println!("Failed paying {}", payment_id),
1631 /// Event::InvoiceRequestFailed { payment_id, .. } => println!("Failed paying {}", payment_id),
1638 /// ## BOLT 12 Refunds
1640 /// A [`Refund`] is a request for an invoice to be paid. Like *paying* for an [`Offer`], *creating*
1641 /// a [`Refund`] involves maintaining state since it represents a future outbound payment.
1642 /// Therefore, use [`create_refund_builder`] when creating one, otherwise [`ChannelManager`] will
1643 /// refuse to pay any corresponding [`Bolt12Invoice`] that it receives.
1646 /// # use core::time::Duration;
1647 /// # use lightning::events::{Event, EventsProvider};
1648 /// # use lightning::ln::channelmanager::{AChannelManager, PaymentId, RecentPaymentDetails, Retry};
1649 /// # use lightning::offers::parse::Bolt12SemanticError;
1651 /// # fn example<T: AChannelManager>(
1652 /// # channel_manager: T, amount_msats: u64, absolute_expiry: Duration, retry: Retry,
1653 /// # max_total_routing_fee_msat: Option<u64>
1654 /// # ) -> Result<(), Bolt12SemanticError> {
1655 /// # let channel_manager = channel_manager.get_cm();
1656 /// let payment_id = PaymentId([42; 32]);
1657 /// let refund = channel_manager
1658 /// .create_refund_builder(
1659 /// amount_msats, absolute_expiry, payment_id, retry, max_total_routing_fee_msat
1662 /// # // Needed for compiling for c_bindings
1663 /// # let builder: lightning::offers::refund::RefundBuilder<_> = refund.into();
1664 /// # let refund = builder
1665 /// .description("coffee".to_string())
1666 /// .payer_note("refund for order 1234".to_string())
1668 /// let bech32_refund = refund.to_string();
1670 /// // First the payment will be waiting on an invoice
1671 /// let expected_payment_id = payment_id;
1673 /// channel_manager.list_recent_payments().iter().find(|details| matches!(
1675 /// RecentPaymentDetails::AwaitingInvoice { payment_id: expected_payment_id }
1679 /// // Once the invoice is received, a payment will be sent
1681 /// channel_manager.list_recent_payments().iter().find(|details| matches!(
1683 /// RecentPaymentDetails::Pending { payment_id: expected_payment_id, .. }
1687 /// // On the event processing thread
1688 /// channel_manager.process_pending_events(&|event| match event {
1689 /// Event::PaymentSent { payment_id: Some(payment_id), .. } => println!("Paid {}", payment_id),
1690 /// Event::PaymentFailed { payment_id, .. } => println!("Failed paying {}", payment_id),
1698 /// Use [`request_refund_payment`] to send a [`Bolt12Invoice`] for receiving the refund. Similar to
1699 /// *creating* an [`Offer`], this is stateless as it represents an inbound payment.
1702 /// # use lightning::events::{Event, EventsProvider, PaymentPurpose};
1703 /// # use lightning::ln::channelmanager::AChannelManager;
1704 /// # use lightning::offers::refund::Refund;
1706 /// # fn example<T: AChannelManager>(channel_manager: T, refund: &Refund) {
1707 /// # let channel_manager = channel_manager.get_cm();
1708 /// let known_payment_hash = match channel_manager.request_refund_payment(refund) {
1709 /// Ok(invoice) => {
1710 /// let payment_hash = invoice.payment_hash();
1711 /// println!("Requesting refund payment {}", payment_hash);
1714 /// Err(e) => panic!("Unable to request payment for refund: {:?}", e),
1717 /// // On the event processing thread
1718 /// channel_manager.process_pending_events(&|event| match event {
1719 /// Event::PaymentClaimable { payment_hash, purpose, .. } => match purpose {
1720 /// PaymentPurpose::Bolt12RefundPayment { payment_preimage: Some(payment_preimage), .. } => {
1721 /// assert_eq!(payment_hash, known_payment_hash);
1722 /// println!("Claiming payment {}", payment_hash);
1723 /// channel_manager.claim_funds(payment_preimage);
1725 /// PaymentPurpose::Bolt12RefundPayment { payment_preimage: None, .. } => {
1726 /// println!("Unknown payment hash: {}", payment_hash);
1731 /// Event::PaymentClaimed { payment_hash, amount_msat, .. } => {
1732 /// assert_eq!(payment_hash, known_payment_hash);
1733 /// println!("Claimed {} msats", amount_msat);
1743 /// Implements [`Writeable`] to write out all channel state to disk. Implies [`peer_disconnected`] for
1744 /// all peers during write/read (though does not modify this instance, only the instance being
1745 /// serialized). This will result in any channels which have not yet exchanged [`funding_created`] (i.e.,
1746 /// called [`funding_transaction_generated`] for outbound channels) being closed.
1748 /// Note that you can be a bit lazier about writing out `ChannelManager` than you can be with
1749 /// [`ChannelMonitor`]. With [`ChannelMonitor`] you MUST durably write each
1750 /// [`ChannelMonitorUpdate`] before returning from
1751 /// [`chain::Watch::watch_channel`]/[`update_channel`] or before completing async writes. With
1752 /// `ChannelManager`s, writing updates happens out-of-band (and will prevent any other
1753 /// `ChannelManager` operations from occurring during the serialization process). If the
1754 /// deserialized version is out-of-date compared to the [`ChannelMonitor`] passed by reference to
1755 /// [`read`], those channels will be force-closed based on the `ChannelMonitor` state and no funds
1756 /// will be lost (modulo on-chain transaction fees).
1758 /// Note that the deserializer is only implemented for `(`[`BlockHash`]`, `[`ChannelManager`]`)`, which
1759 /// tells you the last block hash which was connected. You should get the best block tip before using the manager.
1760 /// See [`chain::Listen`] and [`chain::Confirm`] for more details.
1762 /// # `ChannelUpdate` Messages
1764 /// Note that `ChannelManager` is responsible for tracking liveness of its channels and generating
1765 /// [`ChannelUpdate`] messages informing peers that the channel is temporarily disabled. To avoid
1766 /// spam due to quick disconnection/reconnection, updates are not sent until the channel has been
1767 /// offline for a full minute. In order to track this, you must call
1768 /// [`timer_tick_occurred`] roughly once per minute, though it doesn't have to be perfect.
1770 /// # DoS Mitigation
1772 /// To avoid trivial DoS issues, `ChannelManager` limits the number of inbound connections and
1773 /// inbound channels without confirmed funding transactions. This may result in nodes which we do
1774 /// not have a channel with being unable to connect to us or open new channels with us if we have
1775 /// many peers with unfunded channels.
1777 /// Because it is an indication of trust, inbound channels which we've accepted as 0conf are
1778 /// exempted from the count of unfunded channels. Similarly, outbound channels and connections are
1779 /// never limited. Please ensure you limit the count of such channels yourself.
1783 /// Rather than using a plain `ChannelManager`, it is preferable to use either a [`SimpleArcChannelManager`]
1784 /// a [`SimpleRefChannelManager`], for conciseness. See their documentation for more details, but
1785 /// essentially you should default to using a [`SimpleRefChannelManager`], and use a
1786 /// [`SimpleArcChannelManager`] when you require a `ChannelManager` with a static lifetime, such as when
1787 /// you're using lightning-net-tokio.
1789 /// [`ChainMonitor`]: crate::chain::chainmonitor::ChainMonitor
1790 /// [`MessageHandler`]: crate::ln::peer_handler::MessageHandler
1791 /// [`OnionMessenger`]: crate::onion_message::messenger::OnionMessenger
1792 /// [`PeerManager::read_event`]: crate::ln::peer_handler::PeerManager::read_event
1793 /// [`PeerManager::process_events`]: crate::ln::peer_handler::PeerManager::process_events
1794 /// [`timer_tick_occurred`]: Self::timer_tick_occurred
1795 /// [`get_and_clear_needs_persistence`]: Self::get_and_clear_needs_persistence
1796 /// [`Persister`]: crate::util::persist::Persister
1797 /// [`KVStore`]: crate::util::persist::KVStore
1798 /// [`get_event_or_persistence_needed_future`]: Self::get_event_or_persistence_needed_future
1799 /// [`lightning-block-sync`]: https://docs.rs/lightning_block_sync/latest/lightning_block_sync
1800 /// [`lightning-transaction-sync`]: https://docs.rs/lightning_transaction_sync/latest/lightning_transaction_sync
1801 /// [`lightning-background-processor`]: https://docs.rs/lightning_background_processor/lightning_background_processor
1802 /// [`list_channels`]: Self::list_channels
1803 /// [`list_usable_channels`]: Self::list_usable_channels
1804 /// [`create_channel`]: Self::create_channel
1805 /// [`close_channel`]: Self::force_close_broadcasting_latest_txn
1806 /// [`force_close_broadcasting_latest_txn`]: Self::force_close_broadcasting_latest_txn
1807 /// [BOLT 11]: https://github.com/lightning/bolts/blob/master/11-payment-encoding.md
1808 /// [BOLT 12]: https://github.com/rustyrussell/lightning-rfc/blob/guilt/offers/12-offer-encoding.md
1809 /// [`list_recent_payments`]: Self::list_recent_payments
1810 /// [`abandon_payment`]: Self::abandon_payment
1811 /// [`lightning-invoice`]: https://docs.rs/lightning_invoice/latest/lightning_invoice
1812 /// [`create_inbound_payment`]: Self::create_inbound_payment
1813 /// [`create_inbound_payment_for_hash`]: Self::create_inbound_payment_for_hash
1814 /// [`claim_funds`]: Self::claim_funds
1815 /// [`send_payment`]: Self::send_payment
1816 /// [`offers`]: crate::offers
1817 /// [`create_offer_builder`]: Self::create_offer_builder
1818 /// [`pay_for_offer`]: Self::pay_for_offer
1819 /// [`InvoiceRequest`]: crate::offers::invoice_request::InvoiceRequest
1820 /// [`create_refund_builder`]: Self::create_refund_builder
1821 /// [`request_refund_payment`]: Self::request_refund_payment
1822 /// [`peer_disconnected`]: msgs::ChannelMessageHandler::peer_disconnected
1823 /// [`funding_created`]: msgs::FundingCreated
1824 /// [`funding_transaction_generated`]: Self::funding_transaction_generated
1825 /// [`BlockHash`]: bitcoin::hash_types::BlockHash
1826 /// [`update_channel`]: chain::Watch::update_channel
1827 /// [`ChannelUpdate`]: msgs::ChannelUpdate
1828 /// [`read`]: ReadableArgs::read
1831 // The tree structure below illustrates the lock order requirements for the different locks of the
1832 // `ChannelManager`. Locks can be held at the same time if they are on the same branch in the tree,
1833 // and should then be taken in the order of the lowest to the highest level in the tree.
1834 // Note that locks on different branches shall not be taken at the same time, as doing so will
1835 // create a new lock order for those specific locks in the order they were taken.
1839 // `pending_offers_messages`
1841 // `total_consistency_lock`
1843 // |__`forward_htlcs`
1845 // | |__`pending_intercepted_htlcs`
1847 // |__`decode_update_add_htlcs`
1849 // |__`per_peer_state`
1851 // |__`pending_inbound_payments`
1853 // |__`claimable_payments`
1855 // |__`pending_outbound_payments` // This field's struct contains a map of pending outbounds
1859 // |__`outpoint_to_peer`
1861 // |__`short_to_chan_info`
1863 // |__`outbound_scid_aliases`
1867 // |__`pending_events`
1869 // |__`pending_background_events`
1871 pub struct ChannelManager<M: Deref, T: Deref, ES: Deref, NS: Deref, SP: Deref, F: Deref, R: Deref, L: Deref>
1873 M::Target: chain::Watch<<SP::Target as SignerProvider>::EcdsaSigner>,
1874 T::Target: BroadcasterInterface,
1875 ES::Target: EntropySource,
1876 NS::Target: NodeSigner,
1877 SP::Target: SignerProvider,
1878 F::Target: FeeEstimator,
1882 default_configuration: UserConfig,
1883 chain_hash: ChainHash,
1884 fee_estimator: LowerBoundedFeeEstimator<F>,
1890 /// See `ChannelManager` struct-level documentation for lock order requirements.
1892 pub(super) best_block: RwLock<BestBlock>,
1894 best_block: RwLock<BestBlock>,
1895 secp_ctx: Secp256k1<secp256k1::All>,
1897 /// Storage for PaymentSecrets and any requirements on future inbound payments before we will
1898 /// expose them to users via a PaymentClaimable event. HTLCs which do not meet the requirements
1899 /// here are failed when we process them as pending-forwardable-HTLCs, and entries are removed
1900 /// after we generate a PaymentClaimable upon receipt of all MPP parts or when they time out.
1902 /// See `ChannelManager` struct-level documentation for lock order requirements.
1903 pending_inbound_payments: Mutex<HashMap<PaymentHash, PendingInboundPayment>>,
1905 /// The session_priv bytes and retry metadata of outbound payments which are pending resolution.
1906 /// The authoritative state of these HTLCs resides either within Channels or ChannelMonitors
1907 /// (if the channel has been force-closed), however we track them here to prevent duplicative
1908 /// PaymentSent/PaymentPathFailed events. Specifically, in the case of a duplicative
1909 /// update_fulfill_htlc message after a reconnect, we may "claim" a payment twice.
1910 /// Additionally, because ChannelMonitors are often not re-serialized after connecting block(s)
1911 /// which may generate a claim event, we may receive similar duplicate claim/fail MonitorEvents
1912 /// after reloading from disk while replaying blocks against ChannelMonitors.
1914 /// See `PendingOutboundPayment` documentation for more info.
1916 /// See `ChannelManager` struct-level documentation for lock order requirements.
1917 pending_outbound_payments: OutboundPayments,
1919 /// SCID/SCID Alias -> forward infos. Key of 0 means payments received.
1921 /// Note that because we may have an SCID Alias as the key we can have two entries per channel,
1922 /// though in practice we probably won't be receiving HTLCs for a channel both via the alias
1923 /// and via the classic SCID.
1925 /// Note that no consistency guarantees are made about the existence of a channel with the
1926 /// `short_channel_id` here, nor the `short_channel_id` in the `PendingHTLCInfo`!
1928 /// See `ChannelManager` struct-level documentation for lock order requirements.
1930 pub(super) forward_htlcs: Mutex<HashMap<u64, Vec<HTLCForwardInfo>>>,
1932 forward_htlcs: Mutex<HashMap<u64, Vec<HTLCForwardInfo>>>,
1933 /// Storage for HTLCs that have been intercepted and bubbled up to the user. We hold them here
1934 /// until the user tells us what we should do with them.
1936 /// See `ChannelManager` struct-level documentation for lock order requirements.
1937 pending_intercepted_htlcs: Mutex<HashMap<InterceptId, PendingAddHTLCInfo>>,
1939 /// SCID/SCID Alias -> pending `update_add_htlc`s to decode.
1941 /// Note that because we may have an SCID Alias as the key we can have two entries per channel,
1942 /// though in practice we probably won't be receiving HTLCs for a channel both via the alias
1943 /// and via the classic SCID.
1945 /// Note that no consistency guarantees are made about the existence of a channel with the
1946 /// `short_channel_id` here, nor the `channel_id` in `UpdateAddHTLC`!
1948 /// See `ChannelManager` struct-level documentation for lock order requirements.
1949 decode_update_add_htlcs: Mutex<HashMap<u64, Vec<msgs::UpdateAddHTLC>>>,
1951 /// The sets of payments which are claimable or currently being claimed. See
1952 /// [`ClaimablePayments`]' individual field docs for more info.
1954 /// See `ChannelManager` struct-level documentation for lock order requirements.
1955 claimable_payments: Mutex<ClaimablePayments>,
1957 /// The set of outbound SCID aliases across all our channels, including unconfirmed channels
1958 /// and some closed channels which reached a usable state prior to being closed. This is used
1959 /// only to avoid duplicates, and is not persisted explicitly to disk, but rebuilt from the
1960 /// active channel list on load.
1962 /// See `ChannelManager` struct-level documentation for lock order requirements.
1963 outbound_scid_aliases: Mutex<HashSet<u64>>,
1965 /// Channel funding outpoint -> `counterparty_node_id`.
1967 /// Note that this map should only be used for `MonitorEvent` handling, to be able to access
1968 /// the corresponding channel for the event, as we only have access to the `channel_id` during
1969 /// the handling of the events.
1971 /// Note that no consistency guarantees are made about the existence of a peer with the
1972 /// `counterparty_node_id` in our other maps.
1975 /// The `counterparty_node_id` isn't passed with `MonitorEvent`s currently. To pass it, we need
1976 /// to make `counterparty_node_id`'s a required field in `ChannelMonitor`s, which unfortunately
1977 /// would break backwards compatability.
1978 /// We should add `counterparty_node_id`s to `MonitorEvent`s, and eventually rely on it in the
1979 /// future. That would make this map redundant, as only the `ChannelManager::per_peer_state` is
1980 /// required to access the channel with the `counterparty_node_id`.
1982 /// See `ChannelManager` struct-level documentation for lock order requirements.
1984 outpoint_to_peer: Mutex<HashMap<OutPoint, PublicKey>>,
1986 pub(crate) outpoint_to_peer: Mutex<HashMap<OutPoint, PublicKey>>,
1988 /// SCIDs (and outbound SCID aliases) -> `counterparty_node_id`s and `channel_id`s.
1990 /// Outbound SCID aliases are added here once the channel is available for normal use, with
1991 /// SCIDs being added once the funding transaction is confirmed at the channel's required
1992 /// confirmation depth.
1994 /// Note that while this holds `counterparty_node_id`s and `channel_id`s, no consistency
1995 /// guarantees are made about the existence of a peer with the `counterparty_node_id` nor a
1996 /// channel with the `channel_id` in our other maps.
1998 /// See `ChannelManager` struct-level documentation for lock order requirements.
2000 pub(super) short_to_chan_info: FairRwLock<HashMap<u64, (PublicKey, ChannelId)>>,
2002 short_to_chan_info: FairRwLock<HashMap<u64, (PublicKey, ChannelId)>>,
2004 our_network_pubkey: PublicKey,
2006 inbound_payment_key: inbound_payment::ExpandedKey,
2008 /// LDK puts the [fake scids] that it generates into namespaces, to identify the type of an
2009 /// incoming payment. To make it harder for a third-party to identify the type of a payment,
2010 /// we encrypt the namespace identifier using these bytes.
2012 /// [fake scids]: crate::util::scid_utils::fake_scid
2013 fake_scid_rand_bytes: [u8; 32],
2015 /// When we send payment probes, we generate the [`PaymentHash`] based on this cookie secret
2016 /// and a random [`PaymentId`]. This allows us to discern probes from real payments, without
2017 /// keeping additional state.
2018 probing_cookie_secret: [u8; 32],
2020 /// The highest block timestamp we've seen, which is usually a good guess at the current time.
2021 /// Assuming most miners are generating blocks with reasonable timestamps, this shouldn't be
2022 /// very far in the past, and can only ever be up to two hours in the future.
2023 highest_seen_timestamp: AtomicUsize,
2025 /// The bulk of our storage. Currently the `per_peer_state` stores our channels on a per-peer
2026 /// basis, as well as the peer's latest features.
2028 /// If we are connected to a peer we always at least have an entry here, even if no channels
2029 /// are currently open with that peer.
2031 /// Because adding or removing an entry is rare, we usually take an outer read lock and then
2032 /// operate on the inner value freely. This opens up for parallel per-peer operation for
2035 /// Note that the same thread must never acquire two inner `PeerState` locks at the same time.
2037 /// See `ChannelManager` struct-level documentation for lock order requirements.
2038 #[cfg(not(any(test, feature = "_test_utils")))]
2039 per_peer_state: FairRwLock<HashMap<PublicKey, Mutex<PeerState<SP>>>>,
2040 #[cfg(any(test, feature = "_test_utils"))]
2041 pub(super) per_peer_state: FairRwLock<HashMap<PublicKey, Mutex<PeerState<SP>>>>,
2043 /// The set of events which we need to give to the user to handle. In some cases an event may
2044 /// require some further action after the user handles it (currently only blocking a monitor
2045 /// update from being handed to the user to ensure the included changes to the channel state
2046 /// are handled by the user before they're persisted durably to disk). In that case, the second
2047 /// element in the tuple is set to `Some` with further details of the action.
2049 /// Note that events MUST NOT be removed from pending_events after deserialization, as they
2050 /// could be in the middle of being processed without the direct mutex held.
2052 /// See `ChannelManager` struct-level documentation for lock order requirements.
2053 #[cfg(not(any(test, feature = "_test_utils")))]
2054 pending_events: Mutex<VecDeque<(events::Event, Option<EventCompletionAction>)>>,
2055 #[cfg(any(test, feature = "_test_utils"))]
2056 pub(crate) pending_events: Mutex<VecDeque<(events::Event, Option<EventCompletionAction>)>>,
2058 /// A simple atomic flag to ensure only one task at a time can be processing events asynchronously.
2059 pending_events_processor: AtomicBool,
2061 /// If we are running during init (either directly during the deserialization method or in
2062 /// block connection methods which run after deserialization but before normal operation) we
2063 /// cannot provide the user with [`ChannelMonitorUpdate`]s through the normal update flow -
2064 /// prior to normal operation the user may not have loaded the [`ChannelMonitor`]s into their
2065 /// [`ChainMonitor`] and thus attempting to update it will fail or panic.
2067 /// Thus, we place them here to be handled as soon as possible once we are running normally.
2069 /// See `ChannelManager` struct-level documentation for lock order requirements.
2071 /// [`ChainMonitor`]: crate::chain::chainmonitor::ChainMonitor
2072 pending_background_events: Mutex<Vec<BackgroundEvent>>,
2073 /// Used when we have to take a BIG lock to make sure everything is self-consistent.
2074 /// Essentially just when we're serializing ourselves out.
2075 /// Taken first everywhere where we are making changes before any other locks.
2076 /// When acquiring this lock in read mode, rather than acquiring it directly, call
2077 /// `PersistenceNotifierGuard::notify_on_drop(..)` and pass the lock to it, to ensure the
2078 /// Notifier the lock contains sends out a notification when the lock is released.
2079 total_consistency_lock: RwLock<()>,
2080 /// Tracks the progress of channels going through batch funding by whether funding_signed was
2081 /// received and the monitor has been persisted.
2083 /// This information does not need to be persisted as funding nodes can forget
2084 /// unfunded channels upon disconnection.
2085 funding_batch_states: Mutex<BTreeMap<Txid, Vec<(ChannelId, PublicKey, bool)>>>,
2087 background_events_processed_since_startup: AtomicBool,
2089 event_persist_notifier: Notifier,
2090 needs_persist_flag: AtomicBool,
2092 pending_offers_messages: Mutex<Vec<PendingOnionMessage<OffersMessage>>>,
2094 /// Tracks the message events that are to be broadcasted when we are connected to some peer.
2095 pending_broadcast_messages: Mutex<Vec<MessageSendEvent>>,
2099 signer_provider: SP,
2104 /// Chain-related parameters used to construct a new `ChannelManager`.
2106 /// Typically, the block-specific parameters are derived from the best block hash for the network,
2107 /// as a newly constructed `ChannelManager` will not have created any channels yet. These parameters
2108 /// are not needed when deserializing a previously constructed `ChannelManager`.
2109 #[derive(Clone, Copy, PartialEq)]
2110 pub struct ChainParameters {
2111 /// The network for determining the `chain_hash` in Lightning messages.
2112 pub network: Network,
2114 /// The hash and height of the latest block successfully connected.
2116 /// Used to track on-chain channel funding outputs and send payments with reliable timelocks.
2117 pub best_block: BestBlock,
2120 #[derive(Copy, Clone, PartialEq)]
2124 SkipPersistHandleEvents,
2125 SkipPersistNoEvents,
2128 /// Whenever we release the `ChannelManager`'s `total_consistency_lock`, from read mode, it is
2129 /// desirable to notify any listeners on `await_persistable_update_timeout`/
2130 /// `await_persistable_update` when new updates are available for persistence. Therefore, this
2131 /// struct is responsible for locking the total consistency lock and, upon going out of scope,
2132 /// sending the aforementioned notification (since the lock being released indicates that the
2133 /// updates are ready for persistence).
2135 /// We allow callers to either always notify by constructing with `notify_on_drop` or choose to
2136 /// notify or not based on whether relevant changes have been made, providing a closure to
2137 /// `optionally_notify` which returns a `NotifyOption`.
2138 struct PersistenceNotifierGuard<'a, F: FnMut() -> NotifyOption> {
2139 event_persist_notifier: &'a Notifier,
2140 needs_persist_flag: &'a AtomicBool,
2142 // We hold onto this result so the lock doesn't get released immediately.
2143 _read_guard: RwLockReadGuard<'a, ()>,
2146 impl<'a> PersistenceNotifierGuard<'a, fn() -> NotifyOption> { // We don't care what the concrete F is here, it's unused
2147 /// Notifies any waiters and indicates that we need to persist, in addition to possibly having
2148 /// events to handle.
2150 /// This must always be called if the changes included a `ChannelMonitorUpdate`, as well as in
2151 /// other cases where losing the changes on restart may result in a force-close or otherwise
2153 fn notify_on_drop<C: AChannelManager>(cm: &'a C) -> PersistenceNotifierGuard<'a, impl FnMut() -> NotifyOption> {
2154 Self::optionally_notify(cm, || -> NotifyOption { NotifyOption::DoPersist })
2157 fn optionally_notify<F: FnMut() -> NotifyOption, C: AChannelManager>(cm: &'a C, mut persist_check: F)
2158 -> PersistenceNotifierGuard<'a, impl FnMut() -> NotifyOption> {
2159 let read_guard = cm.get_cm().total_consistency_lock.read().unwrap();
2160 let force_notify = cm.get_cm().process_background_events();
2162 PersistenceNotifierGuard {
2163 event_persist_notifier: &cm.get_cm().event_persist_notifier,
2164 needs_persist_flag: &cm.get_cm().needs_persist_flag,
2165 should_persist: move || {
2166 // Pick the "most" action between `persist_check` and the background events
2167 // processing and return that.
2168 let notify = persist_check();
2169 match (notify, force_notify) {
2170 (NotifyOption::DoPersist, _) => NotifyOption::DoPersist,
2171 (_, NotifyOption::DoPersist) => NotifyOption::DoPersist,
2172 (NotifyOption::SkipPersistHandleEvents, _) => NotifyOption::SkipPersistHandleEvents,
2173 (_, NotifyOption::SkipPersistHandleEvents) => NotifyOption::SkipPersistHandleEvents,
2174 _ => NotifyOption::SkipPersistNoEvents,
2177 _read_guard: read_guard,
2181 /// Note that if any [`ChannelMonitorUpdate`]s are possibly generated,
2182 /// [`ChannelManager::process_background_events`] MUST be called first (or
2183 /// [`Self::optionally_notify`] used).
2184 fn optionally_notify_skipping_background_events<F: Fn() -> NotifyOption, C: AChannelManager>
2185 (cm: &'a C, persist_check: F) -> PersistenceNotifierGuard<'a, F> {
2186 let read_guard = cm.get_cm().total_consistency_lock.read().unwrap();
2188 PersistenceNotifierGuard {
2189 event_persist_notifier: &cm.get_cm().event_persist_notifier,
2190 needs_persist_flag: &cm.get_cm().needs_persist_flag,
2191 should_persist: persist_check,
2192 _read_guard: read_guard,
2197 impl<'a, F: FnMut() -> NotifyOption> Drop for PersistenceNotifierGuard<'a, F> {
2198 fn drop(&mut self) {
2199 match (self.should_persist)() {
2200 NotifyOption::DoPersist => {
2201 self.needs_persist_flag.store(true, Ordering::Release);
2202 self.event_persist_notifier.notify()
2204 NotifyOption::SkipPersistHandleEvents =>
2205 self.event_persist_notifier.notify(),
2206 NotifyOption::SkipPersistNoEvents => {},
2211 /// The amount of time in blocks we require our counterparty wait to claim their money (ie time
2212 /// between when we, or our watchtower, must check for them having broadcast a theft transaction).
2214 /// This can be increased (but not decreased) through [`ChannelHandshakeConfig::our_to_self_delay`]
2216 /// [`ChannelHandshakeConfig::our_to_self_delay`]: crate::util::config::ChannelHandshakeConfig::our_to_self_delay
2217 pub const BREAKDOWN_TIMEOUT: u16 = 6 * 24;
2218 /// The amount of time in blocks we're willing to wait to claim money back to us. This matches
2219 /// the maximum required amount in lnd as of March 2021.
2220 pub(crate) const MAX_LOCAL_BREAKDOWN_TIMEOUT: u16 = 2 * 6 * 24 * 7;
2222 /// The minimum number of blocks between an inbound HTLC's CLTV and the corresponding outbound
2223 /// HTLC's CLTV. The current default represents roughly seven hours of blocks at six blocks/hour.
2225 /// This can be increased (but not decreased) through [`ChannelConfig::cltv_expiry_delta`]
2227 /// [`ChannelConfig::cltv_expiry_delta`]: crate::util::config::ChannelConfig::cltv_expiry_delta
2228 // This should always be a few blocks greater than channelmonitor::CLTV_CLAIM_BUFFER,
2229 // i.e. the node we forwarded the payment on to should always have enough room to reliably time out
2230 // the HTLC via a full update_fail_htlc/commitment_signed dance before we hit the
2231 // CLTV_CLAIM_BUFFER point (we static assert that it's at least 3 blocks more).
2232 pub const MIN_CLTV_EXPIRY_DELTA: u16 = 6*7;
2233 // This should be long enough to allow a payment path drawn across multiple routing hops with substantial
2234 // `cltv_expiry_delta`. Indeed, the length of those values is the reaction delay offered to a routing node
2235 // in case of HTLC on-chain settlement. While appearing less competitive, a node operator could decide to
2236 // scale them up to suit its security policy. At the network-level, we shouldn't constrain them too much,
2237 // while avoiding to introduce a DoS vector. Further, a low CTLV_FAR_FAR_AWAY could be a source of
2238 // routing failure for any HTLC sender picking up an LDK node among the first hops.
2239 pub(super) const CLTV_FAR_FAR_AWAY: u32 = 14 * 24 * 6;
2241 /// Minimum CLTV difference between the current block height and received inbound payments.
2242 /// Invoices generated for payment to us must set their `min_final_cltv_expiry_delta` field to at least
2244 // Note that we fail if exactly HTLC_FAIL_BACK_BUFFER + 1 was used, so we need to add one for
2245 // any payments to succeed. Further, we don't want payments to fail if a block was found while
2246 // a payment was being routed, so we add an extra block to be safe.
2247 pub const MIN_FINAL_CLTV_EXPIRY_DELTA: u16 = HTLC_FAIL_BACK_BUFFER as u16 + 3;
2249 // Check that our CLTV_EXPIRY is at least CLTV_CLAIM_BUFFER + ANTI_REORG_DELAY + LATENCY_GRACE_PERIOD_BLOCKS,
2250 // ie that if the next-hop peer fails the HTLC within
2251 // LATENCY_GRACE_PERIOD_BLOCKS then we'll still have CLTV_CLAIM_BUFFER left to timeout it onchain,
2252 // then waiting ANTI_REORG_DELAY to be reorg-safe on the outbound HLTC and
2253 // failing the corresponding htlc backward, and us now seeing the last block of ANTI_REORG_DELAY before
2254 // LATENCY_GRACE_PERIOD_BLOCKS.
2256 const CHECK_CLTV_EXPIRY_SANITY: u32 = MIN_CLTV_EXPIRY_DELTA as u32 - LATENCY_GRACE_PERIOD_BLOCKS - CLTV_CLAIM_BUFFER - ANTI_REORG_DELAY - LATENCY_GRACE_PERIOD_BLOCKS;
2258 // Check for ability of an attacker to make us fail on-chain by delaying an HTLC claim. See
2259 // ChannelMonitor::should_broadcast_holder_commitment_txn for a description of why this is needed.
2261 const CHECK_CLTV_EXPIRY_SANITY_2: u32 = MIN_CLTV_EXPIRY_DELTA as u32 - LATENCY_GRACE_PERIOD_BLOCKS - 2*CLTV_CLAIM_BUFFER;
2263 /// The number of ticks of [`ChannelManager::timer_tick_occurred`] until expiry of incomplete MPPs
2264 pub(crate) const MPP_TIMEOUT_TICKS: u8 = 3;
2266 /// The number of ticks of [`ChannelManager::timer_tick_occurred`] where a peer is disconnected
2267 /// until we mark the channel disabled and gossip the update.
2268 pub(crate) const DISABLE_GOSSIP_TICKS: u8 = 10;
2270 /// The number of ticks of [`ChannelManager::timer_tick_occurred`] where a peer is connected until
2271 /// we mark the channel enabled and gossip the update.
2272 pub(crate) const ENABLE_GOSSIP_TICKS: u8 = 5;
2274 /// The maximum number of unfunded channels we can have per-peer before we start rejecting new
2275 /// (inbound) ones. The number of peers with unfunded channels is limited separately in
2276 /// [`MAX_UNFUNDED_CHANNEL_PEERS`].
2277 const MAX_UNFUNDED_CHANS_PER_PEER: usize = 4;
2279 /// The maximum number of peers from which we will allow pending unfunded channels. Once we reach
2280 /// this many peers we reject new (inbound) channels from peers with which we don't have a channel.
2281 const MAX_UNFUNDED_CHANNEL_PEERS: usize = 50;
2283 /// The maximum number of peers which we do not have a (funded) channel with. Once we reach this
2284 /// many peers we reject new (inbound) connections.
2285 const MAX_NO_CHANNEL_PEERS: usize = 250;
2287 /// Information needed for constructing an invoice route hint for this channel.
2288 #[derive(Clone, Debug, PartialEq)]
2289 pub struct CounterpartyForwardingInfo {
2290 /// Base routing fee in millisatoshis.
2291 pub fee_base_msat: u32,
2292 /// Amount in millionths of a satoshi the channel will charge per transferred satoshi.
2293 pub fee_proportional_millionths: u32,
2294 /// The minimum difference in cltv_expiry between an ingoing HTLC and its outgoing counterpart,
2295 /// such that the outgoing HTLC is forwardable to this counterparty. See `msgs::ChannelUpdate`'s
2296 /// `cltv_expiry_delta` for more details.
2297 pub cltv_expiry_delta: u16,
2300 /// Channel parameters which apply to our counterparty. These are split out from [`ChannelDetails`]
2301 /// to better separate parameters.
2302 #[derive(Clone, Debug, PartialEq)]
2303 pub struct ChannelCounterparty {
2304 /// The node_id of our counterparty
2305 pub node_id: PublicKey,
2306 /// The Features the channel counterparty provided upon last connection.
2307 /// Useful for routing as it is the most up-to-date copy of the counterparty's features and
2308 /// many routing-relevant features are present in the init context.
2309 pub features: InitFeatures,
2310 /// The value, in satoshis, that must always be held in the channel for our counterparty. This
2311 /// value ensures that if our counterparty broadcasts a revoked state, we can punish them by
2312 /// claiming at least this value on chain.
2314 /// This value is not included in [`inbound_capacity_msat`] as it can never be spent.
2316 /// [`inbound_capacity_msat`]: ChannelDetails::inbound_capacity_msat
2317 pub unspendable_punishment_reserve: u64,
2318 /// Information on the fees and requirements that the counterparty requires when forwarding
2319 /// payments to us through this channel.
2320 pub forwarding_info: Option<CounterpartyForwardingInfo>,
2321 /// The smallest value HTLC (in msat) the remote peer will accept, for this channel. This field
2322 /// is only `None` before we have received either the `OpenChannel` or `AcceptChannel` message
2323 /// from the remote peer, or for `ChannelCounterparty` objects serialized prior to LDK 0.0.107.
2324 pub outbound_htlc_minimum_msat: Option<u64>,
2325 /// The largest value HTLC (in msat) the remote peer currently will accept, for this channel.
2326 pub outbound_htlc_maximum_msat: Option<u64>,
2329 /// Details of a channel, as returned by [`ChannelManager::list_channels`] and [`ChannelManager::list_usable_channels`]
2330 #[derive(Clone, Debug, PartialEq)]
2331 pub struct ChannelDetails {
2332 /// The channel's ID (prior to funding transaction generation, this is a random 32 bytes,
2333 /// thereafter this is the txid of the funding transaction xor the funding transaction output).
2334 /// Note that this means this value is *not* persistent - it can change once during the
2335 /// lifetime of the channel.
2336 pub channel_id: ChannelId,
2337 /// Parameters which apply to our counterparty. See individual fields for more information.
2338 pub counterparty: ChannelCounterparty,
2339 /// The Channel's funding transaction output, if we've negotiated the funding transaction with
2340 /// our counterparty already.
2341 pub funding_txo: Option<OutPoint>,
2342 /// The features which this channel operates with. See individual features for more info.
2344 /// `None` until negotiation completes and the channel type is finalized.
2345 pub channel_type: Option<ChannelTypeFeatures>,
2346 /// The position of the funding transaction in the chain. None if the funding transaction has
2347 /// not yet been confirmed and the channel fully opened.
2349 /// Note that if [`inbound_scid_alias`] is set, it must be used for invoices and inbound
2350 /// payments instead of this. See [`get_inbound_payment_scid`].
2352 /// For channels with [`confirmations_required`] set to `Some(0)`, [`outbound_scid_alias`] may
2353 /// be used in place of this in outbound routes. See [`get_outbound_payment_scid`].
2355 /// [`inbound_scid_alias`]: Self::inbound_scid_alias
2356 /// [`outbound_scid_alias`]: Self::outbound_scid_alias
2357 /// [`get_inbound_payment_scid`]: Self::get_inbound_payment_scid
2358 /// [`get_outbound_payment_scid`]: Self::get_outbound_payment_scid
2359 /// [`confirmations_required`]: Self::confirmations_required
2360 pub short_channel_id: Option<u64>,
2361 /// An optional [`short_channel_id`] alias for this channel, randomly generated by us and
2362 /// usable in place of [`short_channel_id`] to reference the channel in outbound routes when
2363 /// the channel has not yet been confirmed (as long as [`confirmations_required`] is
2366 /// This will be `None` as long as the channel is not available for routing outbound payments.
2368 /// [`short_channel_id`]: Self::short_channel_id
2369 /// [`confirmations_required`]: Self::confirmations_required
2370 pub outbound_scid_alias: Option<u64>,
2371 /// An optional [`short_channel_id`] alias for this channel, randomly generated by our
2372 /// counterparty and usable in place of [`short_channel_id`] in invoice route hints. Our
2373 /// counterparty will recognize the alias provided here in place of the [`short_channel_id`]
2374 /// when they see a payment to be routed to us.
2376 /// Our counterparty may choose to rotate this value at any time, though will always recognize
2377 /// previous values for inbound payment forwarding.
2379 /// [`short_channel_id`]: Self::short_channel_id
2380 pub inbound_scid_alias: Option<u64>,
2381 /// The value, in satoshis, of this channel as appears in the funding output
2382 pub channel_value_satoshis: u64,
2383 /// The value, in satoshis, that must always be held in the channel for us. This value ensures
2384 /// that if we broadcast a revoked state, our counterparty can punish us by claiming at least
2385 /// this value on chain.
2387 /// This value is not included in [`outbound_capacity_msat`] as it can never be spent.
2389 /// This value will be `None` for outbound channels until the counterparty accepts the channel.
2391 /// [`outbound_capacity_msat`]: ChannelDetails::outbound_capacity_msat
2392 pub unspendable_punishment_reserve: Option<u64>,
2393 /// The `user_channel_id` value passed in to [`ChannelManager::create_channel`] for outbound
2394 /// channels, or to [`ChannelManager::accept_inbound_channel`] for inbound channels if
2395 /// [`UserConfig::manually_accept_inbound_channels`] config flag is set to true. Otherwise
2396 /// `user_channel_id` will be randomized for an inbound channel. This may be zero for objects
2397 /// serialized with LDK versions prior to 0.0.113.
2399 /// [`ChannelManager::create_channel`]: crate::ln::channelmanager::ChannelManager::create_channel
2400 /// [`ChannelManager::accept_inbound_channel`]: crate::ln::channelmanager::ChannelManager::accept_inbound_channel
2401 /// [`UserConfig::manually_accept_inbound_channels`]: crate::util::config::UserConfig::manually_accept_inbound_channels
2402 pub user_channel_id: u128,
2403 /// The currently negotiated fee rate denominated in satoshi per 1000 weight units,
2404 /// which is applied to commitment and HTLC transactions.
2406 /// This value will be `None` for objects serialized with LDK versions prior to 0.0.115.
2407 pub feerate_sat_per_1000_weight: Option<u32>,
2408 /// Our total balance. This is the amount we would get if we close the channel.
2409 /// This value is not exact. Due to various in-flight changes and feerate changes, exactly this
2410 /// amount is not likely to be recoverable on close.
2412 /// This does not include any pending HTLCs which are not yet fully resolved (and, thus, whose
2413 /// balance is not available for inclusion in new outbound HTLCs). This further does not include
2414 /// any pending outgoing HTLCs which are awaiting some other resolution to be sent.
2415 /// This does not consider any on-chain fees.
2417 /// See also [`ChannelDetails::outbound_capacity_msat`]
2418 pub balance_msat: u64,
2419 /// The available outbound capacity for sending HTLCs to the remote peer. This does not include
2420 /// any pending HTLCs which are not yet fully resolved (and, thus, whose balance is not
2421 /// available for inclusion in new outbound HTLCs). This further does not include any pending
2422 /// outgoing HTLCs which are awaiting some other resolution to be sent.
2424 /// See also [`ChannelDetails::balance_msat`]
2426 /// This value is not exact. Due to various in-flight changes, feerate changes, and our
2427 /// conflict-avoidance policy, exactly this amount is not likely to be spendable. However, we
2428 /// should be able to spend nearly this amount.
2429 pub outbound_capacity_msat: u64,
2430 /// The available outbound capacity for sending a single HTLC to the remote peer. This is
2431 /// similar to [`ChannelDetails::outbound_capacity_msat`] but it may be further restricted by
2432 /// the current state and per-HTLC limit(s). This is intended for use when routing, allowing us
2433 /// to use a limit as close as possible to the HTLC limit we can currently send.
2435 /// See also [`ChannelDetails::next_outbound_htlc_minimum_msat`],
2436 /// [`ChannelDetails::balance_msat`], and [`ChannelDetails::outbound_capacity_msat`].
2437 pub next_outbound_htlc_limit_msat: u64,
2438 /// The minimum value for sending a single HTLC to the remote peer. This is the equivalent of
2439 /// [`ChannelDetails::next_outbound_htlc_limit_msat`] but represents a lower-bound, rather than
2440 /// an upper-bound. This is intended for use when routing, allowing us to ensure we pick a
2441 /// route which is valid.
2442 pub next_outbound_htlc_minimum_msat: u64,
2443 /// The available inbound capacity for the remote peer to send HTLCs to us. This does not
2444 /// include any pending HTLCs which are not yet fully resolved (and, thus, whose balance is not
2445 /// available for inclusion in new inbound HTLCs).
2446 /// Note that there are some corner cases not fully handled here, so the actual available
2447 /// inbound capacity may be slightly higher than this.
2449 /// This value is not exact. Due to various in-flight changes, feerate changes, and our
2450 /// counterparty's conflict-avoidance policy, exactly this amount is not likely to be spendable.
2451 /// However, our counterparty should be able to spend nearly this amount.
2452 pub inbound_capacity_msat: u64,
2453 /// The number of required confirmations on the funding transaction before the funding will be
2454 /// considered "locked". This number is selected by the channel fundee (i.e. us if
2455 /// [`is_outbound`] is *not* set), and can be selected for inbound channels with
2456 /// [`ChannelHandshakeConfig::minimum_depth`] or limited for outbound channels with
2457 /// [`ChannelHandshakeLimits::max_minimum_depth`].
2459 /// This value will be `None` for outbound channels until the counterparty accepts the channel.
2461 /// [`is_outbound`]: ChannelDetails::is_outbound
2462 /// [`ChannelHandshakeConfig::minimum_depth`]: crate::util::config::ChannelHandshakeConfig::minimum_depth
2463 /// [`ChannelHandshakeLimits::max_minimum_depth`]: crate::util::config::ChannelHandshakeLimits::max_minimum_depth
2464 pub confirmations_required: Option<u32>,
2465 /// The current number of confirmations on the funding transaction.
2467 /// This value will be `None` for objects serialized with LDK versions prior to 0.0.113.
2468 pub confirmations: Option<u32>,
2469 /// The number of blocks (after our commitment transaction confirms) that we will need to wait
2470 /// until we can claim our funds after we force-close the channel. During this time our
2471 /// counterparty is allowed to punish us if we broadcasted a stale state. If our counterparty
2472 /// force-closes the channel and broadcasts a commitment transaction we do not have to wait any
2473 /// time to claim our non-HTLC-encumbered funds.
2475 /// This value will be `None` for outbound channels until the counterparty accepts the channel.
2476 pub force_close_spend_delay: Option<u16>,
2477 /// True if the channel was initiated (and thus funded) by us.
2478 pub is_outbound: bool,
2479 /// True if the channel is confirmed, channel_ready messages have been exchanged, and the
2480 /// channel is not currently being shut down. `channel_ready` message exchange implies the
2481 /// required confirmation count has been reached (and we were connected to the peer at some
2482 /// point after the funding transaction received enough confirmations). The required
2483 /// confirmation count is provided in [`confirmations_required`].
2485 /// [`confirmations_required`]: ChannelDetails::confirmations_required
2486 pub is_channel_ready: bool,
2487 /// The stage of the channel's shutdown.
2488 /// `None` for `ChannelDetails` serialized on LDK versions prior to 0.0.116.
2489 pub channel_shutdown_state: Option<ChannelShutdownState>,
2490 /// True if the channel is (a) confirmed and channel_ready messages have been exchanged, (b)
2491 /// the peer is connected, and (c) the channel is not currently negotiating a shutdown.
2493 /// This is a strict superset of `is_channel_ready`.
2494 pub is_usable: bool,
2495 /// True if this channel is (or will be) publicly-announced.
2496 pub is_public: bool,
2497 /// The smallest value HTLC (in msat) we will accept, for this channel. This field
2498 /// is only `None` for `ChannelDetails` objects serialized prior to LDK 0.0.107
2499 pub inbound_htlc_minimum_msat: Option<u64>,
2500 /// The largest value HTLC (in msat) we currently will accept, for this channel.
2501 pub inbound_htlc_maximum_msat: Option<u64>,
2502 /// Set of configurable parameters that affect channel operation.
2504 /// This field is only `None` for `ChannelDetails` objects serialized prior to LDK 0.0.109.
2505 pub config: Option<ChannelConfig>,
2506 /// Pending inbound HTLCs.
2508 /// This field is empty for objects serialized with LDK versions prior to 0.0.122.
2509 pub pending_inbound_htlcs: Vec<InboundHTLCDetails>,
2510 /// Pending outbound HTLCs.
2512 /// This field is empty for objects serialized with LDK versions prior to 0.0.122.
2513 pub pending_outbound_htlcs: Vec<OutboundHTLCDetails>,
2516 impl ChannelDetails {
2517 /// Gets the current SCID which should be used to identify this channel for inbound payments.
2518 /// This should be used for providing invoice hints or in any other context where our
2519 /// counterparty will forward a payment to us.
2521 /// This is either the [`ChannelDetails::inbound_scid_alias`], if set, or the
2522 /// [`ChannelDetails::short_channel_id`]. See those for more information.
2523 pub fn get_inbound_payment_scid(&self) -> Option<u64> {
2524 self.inbound_scid_alias.or(self.short_channel_id)
2527 /// Gets the current SCID which should be used to identify this channel for outbound payments.
2528 /// This should be used in [`Route`]s to describe the first hop or in other contexts where
2529 /// we're sending or forwarding a payment outbound over this channel.
2531 /// This is either the [`ChannelDetails::short_channel_id`], if set, or the
2532 /// [`ChannelDetails::outbound_scid_alias`]. See those for more information.
2533 pub fn get_outbound_payment_scid(&self) -> Option<u64> {
2534 self.short_channel_id.or(self.outbound_scid_alias)
2537 fn from_channel_context<SP: Deref, F: Deref>(
2538 context: &ChannelContext<SP>, best_block_height: u32, latest_features: InitFeatures,
2539 fee_estimator: &LowerBoundedFeeEstimator<F>
2542 SP::Target: SignerProvider,
2543 F::Target: FeeEstimator
2545 let balance = context.get_available_balances(fee_estimator);
2546 let (to_remote_reserve_satoshis, to_self_reserve_satoshis) =
2547 context.get_holder_counterparty_selected_channel_reserve_satoshis();
2549 channel_id: context.channel_id(),
2550 counterparty: ChannelCounterparty {
2551 node_id: context.get_counterparty_node_id(),
2552 features: latest_features,
2553 unspendable_punishment_reserve: to_remote_reserve_satoshis,
2554 forwarding_info: context.counterparty_forwarding_info(),
2555 // Ensures that we have actually received the `htlc_minimum_msat` value
2556 // from the counterparty through the `OpenChannel` or `AcceptChannel`
2557 // message (as they are always the first message from the counterparty).
2558 // Else `Channel::get_counterparty_htlc_minimum_msat` could return the
2559 // default `0` value set by `Channel::new_outbound`.
2560 outbound_htlc_minimum_msat: if context.have_received_message() {
2561 Some(context.get_counterparty_htlc_minimum_msat()) } else { None },
2562 outbound_htlc_maximum_msat: context.get_counterparty_htlc_maximum_msat(),
2564 funding_txo: context.get_funding_txo(),
2565 // Note that accept_channel (or open_channel) is always the first message, so
2566 // `have_received_message` indicates that type negotiation has completed.
2567 channel_type: if context.have_received_message() { Some(context.get_channel_type().clone()) } else { None },
2568 short_channel_id: context.get_short_channel_id(),
2569 outbound_scid_alias: if context.is_usable() { Some(context.outbound_scid_alias()) } else { None },
2570 inbound_scid_alias: context.latest_inbound_scid_alias(),
2571 channel_value_satoshis: context.get_value_satoshis(),
2572 feerate_sat_per_1000_weight: Some(context.get_feerate_sat_per_1000_weight()),
2573 unspendable_punishment_reserve: to_self_reserve_satoshis,
2574 balance_msat: balance.balance_msat,
2575 inbound_capacity_msat: balance.inbound_capacity_msat,
2576 outbound_capacity_msat: balance.outbound_capacity_msat,
2577 next_outbound_htlc_limit_msat: balance.next_outbound_htlc_limit_msat,
2578 next_outbound_htlc_minimum_msat: balance.next_outbound_htlc_minimum_msat,
2579 user_channel_id: context.get_user_id(),
2580 confirmations_required: context.minimum_depth(),
2581 confirmations: Some(context.get_funding_tx_confirmations(best_block_height)),
2582 force_close_spend_delay: context.get_counterparty_selected_contest_delay(),
2583 is_outbound: context.is_outbound(),
2584 is_channel_ready: context.is_usable(),
2585 is_usable: context.is_live(),
2586 is_public: context.should_announce(),
2587 inbound_htlc_minimum_msat: Some(context.get_holder_htlc_minimum_msat()),
2588 inbound_htlc_maximum_msat: context.get_holder_htlc_maximum_msat(),
2589 config: Some(context.config()),
2590 channel_shutdown_state: Some(context.shutdown_state()),
2591 pending_inbound_htlcs: context.get_pending_inbound_htlc_details(),
2592 pending_outbound_htlcs: context.get_pending_outbound_htlc_details(),
2597 #[derive(Clone, Copy, Debug, PartialEq, Eq)]
2598 /// Further information on the details of the channel shutdown.
2599 /// Upon channels being forced closed (i.e. commitment transaction confirmation detected
2600 /// by `ChainMonitor`), ChannelShutdownState will be set to `ShutdownComplete` or
2601 /// the channel will be removed shortly.
2602 /// Also note, that in normal operation, peers could disconnect at any of these states
2603 /// and require peer re-connection before making progress onto other states
2604 pub enum ChannelShutdownState {
2605 /// Channel has not sent or received a shutdown message.
2607 /// Local node has sent a shutdown message for this channel.
2609 /// Shutdown message exchanges have concluded and the channels are in the midst of
2610 /// resolving all existing open HTLCs before closing can continue.
2612 /// All HTLCs have been resolved, nodes are currently negotiating channel close onchain fee rates.
2613 NegotiatingClosingFee,
2614 /// We've successfully negotiated a closing_signed dance. At this point `ChannelManager` is about
2615 /// to drop the channel.
2619 /// Used by [`ChannelManager::list_recent_payments`] to express the status of recent payments.
2620 /// These include payments that have yet to find a successful path, or have unresolved HTLCs.
2621 #[derive(Debug, PartialEq)]
2622 pub enum RecentPaymentDetails {
2623 /// When an invoice was requested and thus a payment has not yet been sent.
2625 /// A user-provided identifier in [`ChannelManager::send_payment`] used to uniquely identify
2626 /// a payment and ensure idempotency in LDK.
2627 payment_id: PaymentId,
2629 /// When a payment is still being sent and awaiting successful delivery.
2631 /// A user-provided identifier in [`ChannelManager::send_payment`] used to uniquely identify
2632 /// a payment and ensure idempotency in LDK.
2633 payment_id: PaymentId,
2634 /// Hash of the payment that is currently being sent but has yet to be fulfilled or
2636 payment_hash: PaymentHash,
2637 /// Total amount (in msat, excluding fees) across all paths for this payment,
2638 /// not just the amount currently inflight.
2641 /// When a pending payment is fulfilled, we continue tracking it until all pending HTLCs have
2642 /// been resolved. Upon receiving [`Event::PaymentSent`], we delay for a few minutes before the
2643 /// payment is removed from tracking.
2645 /// A user-provided identifier in [`ChannelManager::send_payment`] used to uniquely identify
2646 /// a payment and ensure idempotency in LDK.
2647 payment_id: PaymentId,
2648 /// Hash of the payment that was claimed. `None` for serializations of [`ChannelManager`]
2649 /// made before LDK version 0.0.104.
2650 payment_hash: Option<PaymentHash>,
2652 /// After a payment's retries are exhausted per the provided [`Retry`], or it is explicitly
2653 /// abandoned via [`ChannelManager::abandon_payment`], it is marked as abandoned until all
2654 /// pending HTLCs for this payment resolve and an [`Event::PaymentFailed`] is generated.
2656 /// A user-provided identifier in [`ChannelManager::send_payment`] used to uniquely identify
2657 /// a payment and ensure idempotency in LDK.
2658 payment_id: PaymentId,
2659 /// Hash of the payment that we have given up trying to send.
2660 payment_hash: PaymentHash,
2664 /// Route hints used in constructing invoices for [phantom node payents].
2666 /// [phantom node payments]: crate::sign::PhantomKeysManager
2668 pub struct PhantomRouteHints {
2669 /// The list of channels to be included in the invoice route hints.
2670 pub channels: Vec<ChannelDetails>,
2671 /// A fake scid used for representing the phantom node's fake channel in generating the invoice
2673 pub phantom_scid: u64,
2674 /// The pubkey of the real backing node that would ultimately receive the payment.
2675 pub real_node_pubkey: PublicKey,
2678 macro_rules! handle_error {
2679 ($self: ident, $internal: expr, $counterparty_node_id: expr) => { {
2680 // In testing, ensure there are no deadlocks where the lock is already held upon
2681 // entering the macro.
2682 debug_assert_ne!($self.pending_events.held_by_thread(), LockHeldState::HeldByThread);
2683 debug_assert_ne!($self.per_peer_state.held_by_thread(), LockHeldState::HeldByThread);
2687 Err(MsgHandleErrInternal { err, shutdown_finish, .. }) => {
2688 let mut msg_event = None;
2690 if let Some((shutdown_res, update_option)) = shutdown_finish {
2691 let counterparty_node_id = shutdown_res.counterparty_node_id;
2692 let channel_id = shutdown_res.channel_id;
2693 let logger = WithContext::from(
2694 &$self.logger, Some(counterparty_node_id), Some(channel_id), None
2696 log_error!(logger, "Force-closing channel: {}", err.err);
2698 $self.finish_close_channel(shutdown_res);
2699 if let Some(update) = update_option {
2700 let mut pending_broadcast_messages = $self.pending_broadcast_messages.lock().unwrap();
2701 pending_broadcast_messages.push(events::MessageSendEvent::BroadcastChannelUpdate {
2706 log_error!($self.logger, "Got non-closing error: {}", err.err);
2709 if let msgs::ErrorAction::IgnoreError = err.action {
2711 msg_event = Some(events::MessageSendEvent::HandleError {
2712 node_id: $counterparty_node_id,
2713 action: err.action.clone()
2717 if let Some(msg_event) = msg_event {
2718 let per_peer_state = $self.per_peer_state.read().unwrap();
2719 if let Some(peer_state_mutex) = per_peer_state.get(&$counterparty_node_id) {
2720 let mut peer_state = peer_state_mutex.lock().unwrap();
2721 peer_state.pending_msg_events.push(msg_event);
2725 // Return error in case higher-API need one
2732 macro_rules! update_maps_on_chan_removal {
2733 ($self: expr, $channel_context: expr) => {{
2734 if let Some(outpoint) = $channel_context.get_funding_txo() {
2735 $self.outpoint_to_peer.lock().unwrap().remove(&outpoint);
2737 let mut short_to_chan_info = $self.short_to_chan_info.write().unwrap();
2738 if let Some(short_id) = $channel_context.get_short_channel_id() {
2739 short_to_chan_info.remove(&short_id);
2741 // If the channel was never confirmed on-chain prior to its closure, remove the
2742 // outbound SCID alias we used for it from the collision-prevention set. While we
2743 // generally want to avoid ever re-using an outbound SCID alias across all channels, we
2744 // also don't want a counterparty to be able to trivially cause a memory leak by simply
2745 // opening a million channels with us which are closed before we ever reach the funding
2747 let alias_removed = $self.outbound_scid_aliases.lock().unwrap().remove(&$channel_context.outbound_scid_alias());
2748 debug_assert!(alias_removed);
2750 short_to_chan_info.remove(&$channel_context.outbound_scid_alias());
2754 /// Returns (boolean indicating if we should remove the Channel object from memory, a mapped error)
2755 macro_rules! convert_chan_phase_err {
2756 ($self: ident, $err: expr, $channel: expr, $channel_id: expr, MANUAL_CHANNEL_UPDATE, $channel_update: expr) => {
2758 ChannelError::Warn(msg) => {
2759 (false, MsgHandleErrInternal::from_chan_no_close(ChannelError::Warn(msg), *$channel_id))
2761 ChannelError::Ignore(msg) => {
2762 (false, MsgHandleErrInternal::from_chan_no_close(ChannelError::Ignore(msg), *$channel_id))
2764 ChannelError::Close(msg) => {
2765 let logger = WithChannelContext::from(&$self.logger, &$channel.context, None);
2766 log_error!(logger, "Closing channel {} due to close-required error: {}", $channel_id, msg);
2767 update_maps_on_chan_removal!($self, $channel.context);
2768 let reason = ClosureReason::ProcessingError { err: msg.clone() };
2769 let shutdown_res = $channel.context.force_shutdown(true, reason);
2771 MsgHandleErrInternal::from_finish_shutdown(msg, *$channel_id, shutdown_res, $channel_update);
2776 ($self: ident, $err: expr, $channel: expr, $channel_id: expr, FUNDED_CHANNEL) => {
2777 convert_chan_phase_err!($self, $err, $channel, $channel_id, MANUAL_CHANNEL_UPDATE, { $self.get_channel_update_for_broadcast($channel).ok() })
2779 ($self: ident, $err: expr, $channel: expr, $channel_id: expr, UNFUNDED_CHANNEL) => {
2780 convert_chan_phase_err!($self, $err, $channel, $channel_id, MANUAL_CHANNEL_UPDATE, None)
2782 ($self: ident, $err: expr, $channel_phase: expr, $channel_id: expr) => {
2783 match $channel_phase {
2784 ChannelPhase::Funded(channel) => {
2785 convert_chan_phase_err!($self, $err, channel, $channel_id, FUNDED_CHANNEL)
2787 ChannelPhase::UnfundedOutboundV1(channel) => {
2788 convert_chan_phase_err!($self, $err, channel, $channel_id, UNFUNDED_CHANNEL)
2790 ChannelPhase::UnfundedInboundV1(channel) => {
2791 convert_chan_phase_err!($self, $err, channel, $channel_id, UNFUNDED_CHANNEL)
2793 #[cfg(any(dual_funding, splicing))]
2794 ChannelPhase::UnfundedOutboundV2(channel) => {
2795 convert_chan_phase_err!($self, $err, channel, $channel_id, UNFUNDED_CHANNEL)
2797 #[cfg(any(dual_funding, splicing))]
2798 ChannelPhase::UnfundedInboundV2(channel) => {
2799 convert_chan_phase_err!($self, $err, channel, $channel_id, UNFUNDED_CHANNEL)
2805 macro_rules! break_chan_phase_entry {
2806 ($self: ident, $res: expr, $entry: expr) => {
2810 let key = *$entry.key();
2811 let (drop, res) = convert_chan_phase_err!($self, e, $entry.get_mut(), &key);
2813 $entry.remove_entry();
2821 macro_rules! try_chan_phase_entry {
2822 ($self: ident, $res: expr, $entry: expr) => {
2826 let key = *$entry.key();
2827 let (drop, res) = convert_chan_phase_err!($self, e, $entry.get_mut(), &key);
2829 $entry.remove_entry();
2837 macro_rules! remove_channel_phase {
2838 ($self: expr, $entry: expr) => {
2840 let channel = $entry.remove_entry().1;
2841 update_maps_on_chan_removal!($self, &channel.context());
2847 macro_rules! send_channel_ready {
2848 ($self: ident, $pending_msg_events: expr, $channel: expr, $channel_ready_msg: expr) => {{
2849 $pending_msg_events.push(events::MessageSendEvent::SendChannelReady {
2850 node_id: $channel.context.get_counterparty_node_id(),
2851 msg: $channel_ready_msg,
2853 // Note that we may send a `channel_ready` multiple times for a channel if we reconnect, so
2854 // we allow collisions, but we shouldn't ever be updating the channel ID pointed to.
2855 let mut short_to_chan_info = $self.short_to_chan_info.write().unwrap();
2856 let outbound_alias_insert = short_to_chan_info.insert($channel.context.outbound_scid_alias(), ($channel.context.get_counterparty_node_id(), $channel.context.channel_id()));
2857 assert!(outbound_alias_insert.is_none() || outbound_alias_insert.unwrap() == ($channel.context.get_counterparty_node_id(), $channel.context.channel_id()),
2858 "SCIDs should never collide - ensure you weren't behind the chain tip by a full month when creating channels");
2859 if let Some(real_scid) = $channel.context.get_short_channel_id() {
2860 let scid_insert = short_to_chan_info.insert(real_scid, ($channel.context.get_counterparty_node_id(), $channel.context.channel_id()));
2861 assert!(scid_insert.is_none() || scid_insert.unwrap() == ($channel.context.get_counterparty_node_id(), $channel.context.channel_id()),
2862 "SCIDs should never collide - ensure you weren't behind the chain tip by a full month when creating channels");
2867 macro_rules! emit_channel_pending_event {
2868 ($locked_events: expr, $channel: expr) => {
2869 if $channel.context.should_emit_channel_pending_event() {
2870 $locked_events.push_back((events::Event::ChannelPending {
2871 channel_id: $channel.context.channel_id(),
2872 former_temporary_channel_id: $channel.context.temporary_channel_id(),
2873 counterparty_node_id: $channel.context.get_counterparty_node_id(),
2874 user_channel_id: $channel.context.get_user_id(),
2875 funding_txo: $channel.context.get_funding_txo().unwrap().into_bitcoin_outpoint(),
2876 channel_type: Some($channel.context.get_channel_type().clone()),
2878 $channel.context.set_channel_pending_event_emitted();
2883 macro_rules! emit_channel_ready_event {
2884 ($locked_events: expr, $channel: expr) => {
2885 if $channel.context.should_emit_channel_ready_event() {
2886 debug_assert!($channel.context.channel_pending_event_emitted());
2887 $locked_events.push_back((events::Event::ChannelReady {
2888 channel_id: $channel.context.channel_id(),
2889 user_channel_id: $channel.context.get_user_id(),
2890 counterparty_node_id: $channel.context.get_counterparty_node_id(),
2891 channel_type: $channel.context.get_channel_type().clone(),
2893 $channel.context.set_channel_ready_event_emitted();
2898 macro_rules! handle_monitor_update_completion {
2899 ($self: ident, $peer_state_lock: expr, $peer_state: expr, $per_peer_state_lock: expr, $chan: expr) => { {
2900 let logger = WithChannelContext::from(&$self.logger, &$chan.context, None);
2901 let mut updates = $chan.monitor_updating_restored(&&logger,
2902 &$self.node_signer, $self.chain_hash, &$self.default_configuration,
2903 $self.best_block.read().unwrap().height);
2904 let counterparty_node_id = $chan.context.get_counterparty_node_id();
2905 let channel_update = if updates.channel_ready.is_some() && $chan.context.is_usable() {
2906 // We only send a channel_update in the case where we are just now sending a
2907 // channel_ready and the channel is in a usable state. We may re-send a
2908 // channel_update later through the announcement_signatures process for public
2909 // channels, but there's no reason not to just inform our counterparty of our fees
2911 if let Ok(msg) = $self.get_channel_update_for_unicast($chan) {
2912 Some(events::MessageSendEvent::SendChannelUpdate {
2913 node_id: counterparty_node_id,
2919 let update_actions = $peer_state.monitor_update_blocked_actions
2920 .remove(&$chan.context.channel_id()).unwrap_or(Vec::new());
2922 let (htlc_forwards, decode_update_add_htlcs) = $self.handle_channel_resumption(
2923 &mut $peer_state.pending_msg_events, $chan, updates.raa,
2924 updates.commitment_update, updates.order, updates.accepted_htlcs, updates.pending_update_adds,
2925 updates.funding_broadcastable, updates.channel_ready,
2926 updates.announcement_sigs);
2927 if let Some(upd) = channel_update {
2928 $peer_state.pending_msg_events.push(upd);
2931 let channel_id = $chan.context.channel_id();
2932 let unbroadcasted_batch_funding_txid = $chan.context.unbroadcasted_batch_funding_txid();
2933 core::mem::drop($peer_state_lock);
2934 core::mem::drop($per_peer_state_lock);
2936 // If the channel belongs to a batch funding transaction, the progress of the batch
2937 // should be updated as we have received funding_signed and persisted the monitor.
2938 if let Some(txid) = unbroadcasted_batch_funding_txid {
2939 let mut funding_batch_states = $self.funding_batch_states.lock().unwrap();
2940 let mut batch_completed = false;
2941 if let Some(batch_state) = funding_batch_states.get_mut(&txid) {
2942 let channel_state = batch_state.iter_mut().find(|(chan_id, pubkey, _)| (
2943 *chan_id == channel_id &&
2944 *pubkey == counterparty_node_id
2946 if let Some(channel_state) = channel_state {
2947 channel_state.2 = true;
2949 debug_assert!(false, "Missing channel batch state for channel which completed initial monitor update");
2951 batch_completed = batch_state.iter().all(|(_, _, completed)| *completed);
2953 debug_assert!(false, "Missing batch state for channel which completed initial monitor update");
2956 // When all channels in a batched funding transaction have become ready, it is not necessary
2957 // to track the progress of the batch anymore and the state of the channels can be updated.
2958 if batch_completed {
2959 let removed_batch_state = funding_batch_states.remove(&txid).into_iter().flatten();
2960 let per_peer_state = $self.per_peer_state.read().unwrap();
2961 let mut batch_funding_tx = None;
2962 for (channel_id, counterparty_node_id, _) in removed_batch_state {
2963 if let Some(peer_state_mutex) = per_peer_state.get(&counterparty_node_id) {
2964 let mut peer_state = peer_state_mutex.lock().unwrap();
2965 if let Some(ChannelPhase::Funded(chan)) = peer_state.channel_by_id.get_mut(&channel_id) {
2966 batch_funding_tx = batch_funding_tx.or_else(|| chan.context.unbroadcasted_funding());
2967 chan.set_batch_ready();
2968 let mut pending_events = $self.pending_events.lock().unwrap();
2969 emit_channel_pending_event!(pending_events, chan);
2973 if let Some(tx) = batch_funding_tx {
2974 log_info!($self.logger, "Broadcasting batch funding transaction with txid {}", tx.txid());
2975 $self.tx_broadcaster.broadcast_transactions(&[&tx]);
2980 $self.handle_monitor_update_completion_actions(update_actions);
2982 if let Some(forwards) = htlc_forwards {
2983 $self.forward_htlcs(&mut [forwards][..]);
2985 if let Some(decode) = decode_update_add_htlcs {
2986 $self.push_decode_update_add_htlcs(decode);
2988 $self.finalize_claims(updates.finalized_claimed_htlcs);
2989 for failure in updates.failed_htlcs.drain(..) {
2990 let receiver = HTLCDestination::NextHopChannel { node_id: Some(counterparty_node_id), channel_id };
2991 $self.fail_htlc_backwards_internal(&failure.0, &failure.1, &failure.2, receiver);
2996 macro_rules! handle_new_monitor_update {
2997 ($self: ident, $update_res: expr, $chan: expr, _internal, $completed: expr) => { {
2998 debug_assert!($self.background_events_processed_since_startup.load(Ordering::Acquire));
2999 let logger = WithChannelContext::from(&$self.logger, &$chan.context, None);
3001 ChannelMonitorUpdateStatus::UnrecoverableError => {
3002 let err_str = "ChannelMonitor[Update] persistence failed unrecoverably. This indicates we cannot continue normal operation and must shut down.";
3003 log_error!(logger, "{}", err_str);
3004 panic!("{}", err_str);
3006 ChannelMonitorUpdateStatus::InProgress => {
3007 log_debug!(logger, "ChannelMonitor update for {} in flight, holding messages until the update completes.",
3008 &$chan.context.channel_id());
3011 ChannelMonitorUpdateStatus::Completed => {
3017 ($self: ident, $update_res: expr, $peer_state_lock: expr, $peer_state: expr, $per_peer_state_lock: expr, $chan: expr, INITIAL_MONITOR) => {
3018 handle_new_monitor_update!($self, $update_res, $chan, _internal,
3019 handle_monitor_update_completion!($self, $peer_state_lock, $peer_state, $per_peer_state_lock, $chan))
3021 ($self: ident, $funding_txo: expr, $update: expr, $peer_state_lock: expr, $peer_state: expr, $per_peer_state_lock: expr, $chan: expr) => { {
3022 let in_flight_updates = $peer_state.in_flight_monitor_updates.entry($funding_txo)
3023 .or_insert_with(Vec::new);
3024 // During startup, we push monitor updates as background events through to here in
3025 // order to replay updates that were in-flight when we shut down. Thus, we have to
3026 // filter for uniqueness here.
3027 let idx = in_flight_updates.iter().position(|upd| upd == &$update)
3028 .unwrap_or_else(|| {
3029 in_flight_updates.push($update);
3030 in_flight_updates.len() - 1
3032 let update_res = $self.chain_monitor.update_channel($funding_txo, &in_flight_updates[idx]);
3033 handle_new_monitor_update!($self, update_res, $chan, _internal,
3035 let _ = in_flight_updates.remove(idx);
3036 if in_flight_updates.is_empty() && $chan.blocked_monitor_updates_pending() == 0 {
3037 handle_monitor_update_completion!($self, $peer_state_lock, $peer_state, $per_peer_state_lock, $chan);
3043 macro_rules! process_events_body {
3044 ($self: expr, $event_to_handle: expr, $handle_event: expr) => {
3045 let mut processed_all_events = false;
3046 while !processed_all_events {
3047 if $self.pending_events_processor.compare_exchange(false, true, Ordering::Acquire, Ordering::Relaxed).is_err() {
3054 // We'll acquire our total consistency lock so that we can be sure no other
3055 // persists happen while processing monitor events.
3056 let _read_guard = $self.total_consistency_lock.read().unwrap();
3058 // Because `handle_post_event_actions` may send `ChannelMonitorUpdate`s to the user we must
3059 // ensure any startup-generated background events are handled first.
3060 result = $self.process_background_events();
3062 // TODO: This behavior should be documented. It's unintuitive that we query
3063 // ChannelMonitors when clearing other events.
3064 if $self.process_pending_monitor_events() {
3065 result = NotifyOption::DoPersist;
3069 let pending_events = $self.pending_events.lock().unwrap().clone();
3070 let num_events = pending_events.len();
3071 if !pending_events.is_empty() {
3072 result = NotifyOption::DoPersist;
3075 let mut post_event_actions = Vec::new();
3077 for (event, action_opt) in pending_events {
3078 $event_to_handle = event;
3080 if let Some(action) = action_opt {
3081 post_event_actions.push(action);
3086 let mut pending_events = $self.pending_events.lock().unwrap();
3087 pending_events.drain(..num_events);
3088 processed_all_events = pending_events.is_empty();
3089 // Note that `push_pending_forwards_ev` relies on `pending_events_processor` being
3090 // updated here with the `pending_events` lock acquired.
3091 $self.pending_events_processor.store(false, Ordering::Release);
3094 if !post_event_actions.is_empty() {
3095 $self.handle_post_event_actions(post_event_actions);
3096 // If we had some actions, go around again as we may have more events now
3097 processed_all_events = false;
3101 NotifyOption::DoPersist => {
3102 $self.needs_persist_flag.store(true, Ordering::Release);
3103 $self.event_persist_notifier.notify();
3105 NotifyOption::SkipPersistHandleEvents =>
3106 $self.event_persist_notifier.notify(),
3107 NotifyOption::SkipPersistNoEvents => {},
3113 impl<M: Deref, T: Deref, ES: Deref, NS: Deref, SP: Deref, F: Deref, R: Deref, L: Deref> ChannelManager<M, T, ES, NS, SP, F, R, L>
3115 M::Target: chain::Watch<<SP::Target as SignerProvider>::EcdsaSigner>,
3116 T::Target: BroadcasterInterface,
3117 ES::Target: EntropySource,
3118 NS::Target: NodeSigner,
3119 SP::Target: SignerProvider,
3120 F::Target: FeeEstimator,
3124 /// Constructs a new `ChannelManager` to hold several channels and route between them.
3126 /// The current time or latest block header time can be provided as the `current_timestamp`.
3128 /// This is the main "logic hub" for all channel-related actions, and implements
3129 /// [`ChannelMessageHandler`].
3131 /// Non-proportional fees are fixed according to our risk using the provided fee estimator.
3133 /// Users need to notify the new `ChannelManager` when a new block is connected or
3134 /// disconnected using its [`block_connected`] and [`block_disconnected`] methods, starting
3135 /// from after [`params.best_block.block_hash`]. See [`chain::Listen`] and [`chain::Confirm`] for
3138 /// [`block_connected`]: chain::Listen::block_connected
3139 /// [`block_disconnected`]: chain::Listen::block_disconnected
3140 /// [`params.best_block.block_hash`]: chain::BestBlock::block_hash
3142 fee_est: F, chain_monitor: M, tx_broadcaster: T, router: R, logger: L, entropy_source: ES,
3143 node_signer: NS, signer_provider: SP, config: UserConfig, params: ChainParameters,
3144 current_timestamp: u32,
3146 let mut secp_ctx = Secp256k1::new();
3147 secp_ctx.seeded_randomize(&entropy_source.get_secure_random_bytes());
3148 let inbound_pmt_key_material = node_signer.get_inbound_payment_key_material();
3149 let expanded_inbound_key = inbound_payment::ExpandedKey::new(&inbound_pmt_key_material);
3151 default_configuration: config.clone(),
3152 chain_hash: ChainHash::using_genesis_block(params.network),
3153 fee_estimator: LowerBoundedFeeEstimator::new(fee_est),
3158 best_block: RwLock::new(params.best_block),
3160 outbound_scid_aliases: Mutex::new(new_hash_set()),
3161 pending_inbound_payments: Mutex::new(new_hash_map()),
3162 pending_outbound_payments: OutboundPayments::new(),
3163 forward_htlcs: Mutex::new(new_hash_map()),
3164 decode_update_add_htlcs: Mutex::new(new_hash_map()),
3165 claimable_payments: Mutex::new(ClaimablePayments { claimable_payments: new_hash_map(), pending_claiming_payments: new_hash_map() }),
3166 pending_intercepted_htlcs: Mutex::new(new_hash_map()),
3167 outpoint_to_peer: Mutex::new(new_hash_map()),
3168 short_to_chan_info: FairRwLock::new(new_hash_map()),
3170 our_network_pubkey: node_signer.get_node_id(Recipient::Node).unwrap(),
3173 inbound_payment_key: expanded_inbound_key,
3174 fake_scid_rand_bytes: entropy_source.get_secure_random_bytes(),
3176 probing_cookie_secret: entropy_source.get_secure_random_bytes(),
3178 highest_seen_timestamp: AtomicUsize::new(current_timestamp as usize),
3180 per_peer_state: FairRwLock::new(new_hash_map()),
3182 pending_events: Mutex::new(VecDeque::new()),
3183 pending_events_processor: AtomicBool::new(false),
3184 pending_background_events: Mutex::new(Vec::new()),
3185 total_consistency_lock: RwLock::new(()),
3186 background_events_processed_since_startup: AtomicBool::new(false),
3187 event_persist_notifier: Notifier::new(),
3188 needs_persist_flag: AtomicBool::new(false),
3189 funding_batch_states: Mutex::new(BTreeMap::new()),
3191 pending_offers_messages: Mutex::new(Vec::new()),
3192 pending_broadcast_messages: Mutex::new(Vec::new()),
3202 /// Gets the current configuration applied to all new channels.
3203 pub fn get_current_default_configuration(&self) -> &UserConfig {
3204 &self.default_configuration
3207 fn create_and_insert_outbound_scid_alias(&self) -> u64 {
3208 let height = self.best_block.read().unwrap().height;
3209 let mut outbound_scid_alias = 0;
3212 if cfg!(fuzzing) { // fuzzing chacha20 doesn't use the key at all so we always get the same alias
3213 outbound_scid_alias += 1;
3215 outbound_scid_alias = fake_scid::Namespace::OutboundAlias.get_fake_scid(height, &self.chain_hash, &self.fake_scid_rand_bytes, &self.entropy_source);
3217 if outbound_scid_alias != 0 && self.outbound_scid_aliases.lock().unwrap().insert(outbound_scid_alias) {
3221 if i > 1_000_000 { panic!("Your RNG is busted or we ran out of possible outbound SCID aliases (which should never happen before we run out of memory to store channels"); }
3226 /// Creates a new outbound channel to the given remote node and with the given value.
3228 /// `user_channel_id` will be provided back as in
3229 /// [`Event::FundingGenerationReady::user_channel_id`] to allow tracking of which events
3230 /// correspond with which `create_channel` call. Note that the `user_channel_id` defaults to a
3231 /// randomized value for inbound channels. `user_channel_id` has no meaning inside of LDK, it
3232 /// is simply copied to events and otherwise ignored.
3234 /// Raises [`APIError::APIMisuseError`] when `channel_value_satoshis` > 2**24 or `push_msat` is
3235 /// greater than `channel_value_satoshis * 1k` or `channel_value_satoshis < 1000`.
3237 /// Raises [`APIError::ChannelUnavailable`] if the channel cannot be opened due to failing to
3238 /// generate a shutdown scriptpubkey or destination script set by
3239 /// [`SignerProvider::get_shutdown_scriptpubkey`] or [`SignerProvider::get_destination_script`].
3241 /// Note that we do not check if you are currently connected to the given peer. If no
3242 /// connection is available, the outbound `open_channel` message may fail to send, resulting in
3243 /// the channel eventually being silently forgotten (dropped on reload).
3245 /// If `temporary_channel_id` is specified, it will be used as the temporary channel ID of the
3246 /// channel. Otherwise, a random one will be generated for you.
3248 /// Returns the new Channel's temporary `channel_id`. This ID will appear as
3249 /// [`Event::FundingGenerationReady::temporary_channel_id`] and in
3250 /// [`ChannelDetails::channel_id`] until after
3251 /// [`ChannelManager::funding_transaction_generated`] is called, swapping the Channel's ID for
3252 /// one derived from the funding transaction's TXID. If the counterparty rejects the channel
3253 /// immediately, this temporary ID will appear in [`Event::ChannelClosed::channel_id`].
3255 /// [`Event::FundingGenerationReady::user_channel_id`]: events::Event::FundingGenerationReady::user_channel_id
3256 /// [`Event::FundingGenerationReady::temporary_channel_id`]: events::Event::FundingGenerationReady::temporary_channel_id
3257 /// [`Event::ChannelClosed::channel_id`]: events::Event::ChannelClosed::channel_id
3258 pub fn create_channel(&self, their_network_key: PublicKey, channel_value_satoshis: u64, push_msat: u64, user_channel_id: u128, temporary_channel_id: Option<ChannelId>, override_config: Option<UserConfig>) -> Result<ChannelId, APIError> {
3259 if channel_value_satoshis < 1000 {
3260 return Err(APIError::APIMisuseError { err: format!("Channel value must be at least 1000 satoshis. It was {}", channel_value_satoshis) });
3263 let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
3264 // We want to make sure the lock is actually acquired by PersistenceNotifierGuard.
3265 debug_assert!(&self.total_consistency_lock.try_write().is_err());
3267 let per_peer_state = self.per_peer_state.read().unwrap();
3269 let peer_state_mutex = per_peer_state.get(&their_network_key)
3270 .ok_or_else(|| APIError::APIMisuseError{ err: format!("Not connected to node: {}", their_network_key) })?;
3272 let mut peer_state = peer_state_mutex.lock().unwrap();
3274 if let Some(temporary_channel_id) = temporary_channel_id {
3275 if peer_state.channel_by_id.contains_key(&temporary_channel_id) {
3276 return Err(APIError::APIMisuseError{ err: format!("Channel with temporary channel ID {} already exists!", temporary_channel_id)});
3281 let outbound_scid_alias = self.create_and_insert_outbound_scid_alias();
3282 let their_features = &peer_state.latest_features;
3283 let config = if override_config.is_some() { override_config.as_ref().unwrap() } else { &self.default_configuration };
3284 match OutboundV1Channel::new(&self.fee_estimator, &self.entropy_source, &self.signer_provider, their_network_key,
3285 their_features, channel_value_satoshis, push_msat, user_channel_id, config,
3286 self.best_block.read().unwrap().height, outbound_scid_alias, temporary_channel_id)
3290 self.outbound_scid_aliases.lock().unwrap().remove(&outbound_scid_alias);
3295 let res = channel.get_open_channel(self.chain_hash);
3297 let temporary_channel_id = channel.context.channel_id();
3298 match peer_state.channel_by_id.entry(temporary_channel_id) {
3299 hash_map::Entry::Occupied(_) => {
3301 return Err(APIError::APIMisuseError { err: "Fuzzy bad RNG".to_owned() });
3303 panic!("RNG is bad???");
3306 hash_map::Entry::Vacant(entry) => { entry.insert(ChannelPhase::UnfundedOutboundV1(channel)); }
3309 peer_state.pending_msg_events.push(events::MessageSendEvent::SendOpenChannel {
3310 node_id: their_network_key,
3313 Ok(temporary_channel_id)
3316 fn list_funded_channels_with_filter<Fn: FnMut(&(&ChannelId, &Channel<SP>)) -> bool + Copy>(&self, f: Fn) -> Vec<ChannelDetails> {
3317 // Allocate our best estimate of the number of channels we have in the `res`
3318 // Vec. Sadly the `short_to_chan_info` map doesn't cover channels without
3319 // a scid or a scid alias, and the `outpoint_to_peer` shouldn't be used outside
3320 // of the ChannelMonitor handling. Therefore reallocations may still occur, but is
3321 // unlikely as the `short_to_chan_info` map often contains 2 entries for
3322 // the same channel.
3323 let mut res = Vec::with_capacity(self.short_to_chan_info.read().unwrap().len());
3325 let best_block_height = self.best_block.read().unwrap().height;
3326 let per_peer_state = self.per_peer_state.read().unwrap();
3327 for (_cp_id, peer_state_mutex) in per_peer_state.iter() {
3328 let mut peer_state_lock = peer_state_mutex.lock().unwrap();
3329 let peer_state = &mut *peer_state_lock;
3330 res.extend(peer_state.channel_by_id.iter()
3331 .filter_map(|(chan_id, phase)| match phase {
3332 // Only `Channels` in the `ChannelPhase::Funded` phase can be considered funded.
3333 ChannelPhase::Funded(chan) => Some((chan_id, chan)),
3337 .map(|(_channel_id, channel)| {
3338 ChannelDetails::from_channel_context(&channel.context, best_block_height,
3339 peer_state.latest_features.clone(), &self.fee_estimator)
3347 /// Gets the list of open channels, in random order. See [`ChannelDetails`] field documentation for
3348 /// more information.
3349 pub fn list_channels(&self) -> Vec<ChannelDetails> {
3350 // Allocate our best estimate of the number of channels we have in the `res`
3351 // Vec. Sadly the `short_to_chan_info` map doesn't cover channels without
3352 // a scid or a scid alias, and the `outpoint_to_peer` shouldn't be used outside
3353 // of the ChannelMonitor handling. Therefore reallocations may still occur, but is
3354 // unlikely as the `short_to_chan_info` map often contains 2 entries for
3355 // the same channel.
3356 let mut res = Vec::with_capacity(self.short_to_chan_info.read().unwrap().len());
3358 let best_block_height = self.best_block.read().unwrap().height;
3359 let per_peer_state = self.per_peer_state.read().unwrap();
3360 for (_cp_id, peer_state_mutex) in per_peer_state.iter() {
3361 let mut peer_state_lock = peer_state_mutex.lock().unwrap();
3362 let peer_state = &mut *peer_state_lock;
3363 for context in peer_state.channel_by_id.iter().map(|(_, phase)| phase.context()) {
3364 let details = ChannelDetails::from_channel_context(context, best_block_height,
3365 peer_state.latest_features.clone(), &self.fee_estimator);
3373 /// Gets the list of usable channels, in random order. Useful as an argument to
3374 /// [`Router::find_route`] to ensure non-announced channels are used.
3376 /// These are guaranteed to have their [`ChannelDetails::is_usable`] value set to true, see the
3377 /// documentation for [`ChannelDetails::is_usable`] for more info on exactly what the criteria
3379 pub fn list_usable_channels(&self) -> Vec<ChannelDetails> {
3380 // Note we use is_live here instead of usable which leads to somewhat confused
3381 // internal/external nomenclature, but that's ok cause that's probably what the user
3382 // really wanted anyway.
3383 self.list_funded_channels_with_filter(|&(_, ref channel)| channel.context.is_live())
3386 /// Gets the list of channels we have with a given counterparty, in random order.
3387 pub fn list_channels_with_counterparty(&self, counterparty_node_id: &PublicKey) -> Vec<ChannelDetails> {
3388 let best_block_height = self.best_block.read().unwrap().height;
3389 let per_peer_state = self.per_peer_state.read().unwrap();
3391 if let Some(peer_state_mutex) = per_peer_state.get(counterparty_node_id) {
3392 let mut peer_state_lock = peer_state_mutex.lock().unwrap();
3393 let peer_state = &mut *peer_state_lock;
3394 let features = &peer_state.latest_features;
3395 let context_to_details = |context| {
3396 ChannelDetails::from_channel_context(context, best_block_height, features.clone(), &self.fee_estimator)
3398 return peer_state.channel_by_id
3400 .map(|(_, phase)| phase.context())
3401 .map(context_to_details)
3407 /// Returns in an undefined order recent payments that -- if not fulfilled -- have yet to find a
3408 /// successful path, or have unresolved HTLCs.
3410 /// This can be useful for payments that may have been prepared, but ultimately not sent, as a
3411 /// result of a crash. If such a payment exists, is not listed here, and an
3412 /// [`Event::PaymentSent`] has not been received, you may consider resending the payment.
3414 /// [`Event::PaymentSent`]: events::Event::PaymentSent
3415 pub fn list_recent_payments(&self) -> Vec<RecentPaymentDetails> {
3416 self.pending_outbound_payments.pending_outbound_payments.lock().unwrap().iter()
3417 .filter_map(|(payment_id, pending_outbound_payment)| match pending_outbound_payment {
3418 PendingOutboundPayment::AwaitingInvoice { .. } => {
3419 Some(RecentPaymentDetails::AwaitingInvoice { payment_id: *payment_id })
3421 // InvoiceReceived is an intermediate state and doesn't need to be exposed
3422 PendingOutboundPayment::InvoiceReceived { .. } => {
3423 Some(RecentPaymentDetails::AwaitingInvoice { payment_id: *payment_id })
3425 PendingOutboundPayment::Retryable { payment_hash, total_msat, .. } => {
3426 Some(RecentPaymentDetails::Pending {
3427 payment_id: *payment_id,
3428 payment_hash: *payment_hash,
3429 total_msat: *total_msat,
3432 PendingOutboundPayment::Abandoned { payment_hash, .. } => {
3433 Some(RecentPaymentDetails::Abandoned { payment_id: *payment_id, payment_hash: *payment_hash })
3435 PendingOutboundPayment::Fulfilled { payment_hash, .. } => {
3436 Some(RecentPaymentDetails::Fulfilled { payment_id: *payment_id, payment_hash: *payment_hash })
3438 PendingOutboundPayment::Legacy { .. } => None
3443 fn close_channel_internal(&self, channel_id: &ChannelId, counterparty_node_id: &PublicKey, target_feerate_sats_per_1000_weight: Option<u32>, override_shutdown_script: Option<ShutdownScript>) -> Result<(), APIError> {
3444 let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
3446 let mut failed_htlcs: Vec<(HTLCSource, PaymentHash)> = Vec::new();
3447 let mut shutdown_result = None;
3450 let per_peer_state = self.per_peer_state.read().unwrap();
3452 let peer_state_mutex = per_peer_state.get(counterparty_node_id)
3453 .ok_or_else(|| APIError::ChannelUnavailable { err: format!("Can't find a peer matching the passed counterparty node_id {}", counterparty_node_id) })?;
3455 let mut peer_state_lock = peer_state_mutex.lock().unwrap();
3456 let peer_state = &mut *peer_state_lock;
3458 match peer_state.channel_by_id.entry(channel_id.clone()) {
3459 hash_map::Entry::Occupied(mut chan_phase_entry) => {
3460 if let ChannelPhase::Funded(chan) = chan_phase_entry.get_mut() {
3461 let funding_txo_opt = chan.context.get_funding_txo();
3462 let their_features = &peer_state.latest_features;
3463 let (shutdown_msg, mut monitor_update_opt, htlcs) =
3464 chan.get_shutdown(&self.signer_provider, their_features, target_feerate_sats_per_1000_weight, override_shutdown_script)?;
3465 failed_htlcs = htlcs;
3467 // We can send the `shutdown` message before updating the `ChannelMonitor`
3468 // here as we don't need the monitor update to complete until we send a
3469 // `shutdown_signed`, which we'll delay if we're pending a monitor update.
3470 peer_state.pending_msg_events.push(events::MessageSendEvent::SendShutdown {
3471 node_id: *counterparty_node_id,
3475 debug_assert!(monitor_update_opt.is_none() || !chan.is_shutdown(),
3476 "We can't both complete shutdown and generate a monitor update");
3478 // Update the monitor with the shutdown script if necessary.
3479 if let Some(monitor_update) = monitor_update_opt.take() {
3480 handle_new_monitor_update!(self, funding_txo_opt.unwrap(), monitor_update,
3481 peer_state_lock, peer_state, per_peer_state, chan);
3484 let mut chan_phase = remove_channel_phase!(self, chan_phase_entry);
3485 shutdown_result = Some(chan_phase.context_mut().force_shutdown(false, ClosureReason::HolderForceClosed));
3488 hash_map::Entry::Vacant(_) => {
3489 return Err(APIError::ChannelUnavailable {
3491 "Channel with id {} not found for the passed counterparty node_id {}",
3492 channel_id, counterparty_node_id,
3499 for htlc_source in failed_htlcs.drain(..) {
3500 let reason = HTLCFailReason::from_failure_code(0x4000 | 8);
3501 let receiver = HTLCDestination::NextHopChannel { node_id: Some(*counterparty_node_id), channel_id: *channel_id };
3502 self.fail_htlc_backwards_internal(&htlc_source.0, &htlc_source.1, &reason, receiver);
3505 if let Some(shutdown_result) = shutdown_result {
3506 self.finish_close_channel(shutdown_result);
3512 /// Begins the process of closing a channel. After this call (plus some timeout), no new HTLCs
3513 /// will be accepted on the given channel, and after additional timeout/the closing of all
3514 /// pending HTLCs, the channel will be closed on chain.
3516 /// * If we are the channel initiator, we will pay between our [`ChannelCloseMinimum`] and
3517 /// [`ChannelConfig::force_close_avoidance_max_fee_satoshis`] plus our [`NonAnchorChannelFee`]
3519 /// * If our counterparty is the channel initiator, we will require a channel closing
3520 /// transaction feerate of at least our [`ChannelCloseMinimum`] feerate or the feerate which
3521 /// would appear on a force-closure transaction, whichever is lower. We will allow our
3522 /// counterparty to pay as much fee as they'd like, however.
3524 /// May generate a [`SendShutdown`] message event on success, which should be relayed.
3526 /// Raises [`APIError::ChannelUnavailable`] if the channel cannot be closed due to failing to
3527 /// generate a shutdown scriptpubkey or destination script set by
3528 /// [`SignerProvider::get_shutdown_scriptpubkey`]. A force-closure may be needed to close the
3531 /// [`ChannelConfig::force_close_avoidance_max_fee_satoshis`]: crate::util::config::ChannelConfig::force_close_avoidance_max_fee_satoshis
3532 /// [`ChannelCloseMinimum`]: crate::chain::chaininterface::ConfirmationTarget::ChannelCloseMinimum
3533 /// [`NonAnchorChannelFee`]: crate::chain::chaininterface::ConfirmationTarget::NonAnchorChannelFee
3534 /// [`SendShutdown`]: crate::events::MessageSendEvent::SendShutdown
3535 pub fn close_channel(&self, channel_id: &ChannelId, counterparty_node_id: &PublicKey) -> Result<(), APIError> {
3536 self.close_channel_internal(channel_id, counterparty_node_id, None, None)
3539 /// Begins the process of closing a channel. After this call (plus some timeout), no new HTLCs
3540 /// will be accepted on the given channel, and after additional timeout/the closing of all
3541 /// pending HTLCs, the channel will be closed on chain.
3543 /// `target_feerate_sat_per_1000_weight` has different meanings depending on if we initiated
3544 /// the channel being closed or not:
3545 /// * If we are the channel initiator, we will pay at least this feerate on the closing
3546 /// transaction. The upper-bound is set by
3547 /// [`ChannelConfig::force_close_avoidance_max_fee_satoshis`] plus our [`NonAnchorChannelFee`]
3548 /// fee estimate (or `target_feerate_sat_per_1000_weight`, if it is greater).
3549 /// * If our counterparty is the channel initiator, we will refuse to accept a channel closure
3550 /// transaction feerate below `target_feerate_sat_per_1000_weight` (or the feerate which
3551 /// will appear on a force-closure transaction, whichever is lower).
3553 /// The `shutdown_script` provided will be used as the `scriptPubKey` for the closing transaction.
3554 /// Will fail if a shutdown script has already been set for this channel by
3555 /// ['ChannelHandshakeConfig::commit_upfront_shutdown_pubkey`]. The given shutdown script must
3556 /// also be compatible with our and the counterparty's features.
3558 /// May generate a [`SendShutdown`] message event on success, which should be relayed.
3560 /// Raises [`APIError::ChannelUnavailable`] if the channel cannot be closed due to failing to
3561 /// generate a shutdown scriptpubkey or destination script set by
3562 /// [`SignerProvider::get_shutdown_scriptpubkey`]. A force-closure may be needed to close the
3565 /// [`ChannelConfig::force_close_avoidance_max_fee_satoshis`]: crate::util::config::ChannelConfig::force_close_avoidance_max_fee_satoshis
3566 /// [`NonAnchorChannelFee`]: crate::chain::chaininterface::ConfirmationTarget::NonAnchorChannelFee
3567 /// [`SendShutdown`]: crate::events::MessageSendEvent::SendShutdown
3568 pub fn close_channel_with_feerate_and_script(&self, channel_id: &ChannelId, counterparty_node_id: &PublicKey, target_feerate_sats_per_1000_weight: Option<u32>, shutdown_script: Option<ShutdownScript>) -> Result<(), APIError> {
3569 self.close_channel_internal(channel_id, counterparty_node_id, target_feerate_sats_per_1000_weight, shutdown_script)
3572 fn finish_close_channel(&self, mut shutdown_res: ShutdownResult) {
3573 debug_assert_ne!(self.per_peer_state.held_by_thread(), LockHeldState::HeldByThread);
3574 #[cfg(debug_assertions)]
3575 for (_, peer) in self.per_peer_state.read().unwrap().iter() {
3576 debug_assert_ne!(peer.held_by_thread(), LockHeldState::HeldByThread);
3579 let logger = WithContext::from(
3580 &self.logger, Some(shutdown_res.counterparty_node_id), Some(shutdown_res.channel_id), None
3583 log_debug!(logger, "Finishing closure of channel due to {} with {} HTLCs to fail",
3584 shutdown_res.closure_reason, shutdown_res.dropped_outbound_htlcs.len());
3585 for htlc_source in shutdown_res.dropped_outbound_htlcs.drain(..) {
3586 let (source, payment_hash, counterparty_node_id, channel_id) = htlc_source;
3587 let reason = HTLCFailReason::from_failure_code(0x4000 | 8);
3588 let receiver = HTLCDestination::NextHopChannel { node_id: Some(counterparty_node_id), channel_id };
3589 self.fail_htlc_backwards_internal(&source, &payment_hash, &reason, receiver);
3591 if let Some((_, funding_txo, _channel_id, monitor_update)) = shutdown_res.monitor_update {
3592 // There isn't anything we can do if we get an update failure - we're already
3593 // force-closing. The monitor update on the required in-memory copy should broadcast
3594 // the latest local state, which is the best we can do anyway. Thus, it is safe to
3595 // ignore the result here.
3596 let _ = self.chain_monitor.update_channel(funding_txo, &monitor_update);
3598 let mut shutdown_results = Vec::new();
3599 if let Some(txid) = shutdown_res.unbroadcasted_batch_funding_txid {
3600 let mut funding_batch_states = self.funding_batch_states.lock().unwrap();
3601 let affected_channels = funding_batch_states.remove(&txid).into_iter().flatten();
3602 let per_peer_state = self.per_peer_state.read().unwrap();
3603 let mut has_uncompleted_channel = None;
3604 for (channel_id, counterparty_node_id, state) in affected_channels {
3605 if let Some(peer_state_mutex) = per_peer_state.get(&counterparty_node_id) {
3606 let mut peer_state = peer_state_mutex.lock().unwrap();
3607 if let Some(mut chan) = peer_state.channel_by_id.remove(&channel_id) {
3608 update_maps_on_chan_removal!(self, &chan.context());
3609 shutdown_results.push(chan.context_mut().force_shutdown(false, ClosureReason::FundingBatchClosure));
3612 has_uncompleted_channel = Some(has_uncompleted_channel.map_or(!state, |v| v || !state));
3615 has_uncompleted_channel.unwrap_or(true),
3616 "Closing a batch where all channels have completed initial monitor update",
3621 let mut pending_events = self.pending_events.lock().unwrap();
3622 pending_events.push_back((events::Event::ChannelClosed {
3623 channel_id: shutdown_res.channel_id,
3624 user_channel_id: shutdown_res.user_channel_id,
3625 reason: shutdown_res.closure_reason,
3626 counterparty_node_id: Some(shutdown_res.counterparty_node_id),
3627 channel_capacity_sats: Some(shutdown_res.channel_capacity_satoshis),
3628 channel_funding_txo: shutdown_res.channel_funding_txo,
3631 if let Some(transaction) = shutdown_res.unbroadcasted_funding_tx {
3632 pending_events.push_back((events::Event::DiscardFunding {
3633 channel_id: shutdown_res.channel_id, transaction
3637 for shutdown_result in shutdown_results.drain(..) {
3638 self.finish_close_channel(shutdown_result);
3642 /// `peer_msg` should be set when we receive a message from a peer, but not set when the
3643 /// user closes, which will be re-exposed as the `ChannelClosed` reason.
3644 fn force_close_channel_with_peer(&self, channel_id: &ChannelId, peer_node_id: &PublicKey, peer_msg: Option<&String>, broadcast: bool)
3645 -> Result<PublicKey, APIError> {
3646 let per_peer_state = self.per_peer_state.read().unwrap();
3647 let peer_state_mutex = per_peer_state.get(peer_node_id)
3648 .ok_or_else(|| APIError::ChannelUnavailable { err: format!("Can't find a peer matching the passed counterparty node_id {}", peer_node_id) })?;
3649 let (update_opt, counterparty_node_id) = {
3650 let mut peer_state = peer_state_mutex.lock().unwrap();
3651 let closure_reason = if let Some(peer_msg) = peer_msg {
3652 ClosureReason::CounterpartyForceClosed { peer_msg: UntrustedString(peer_msg.to_string()) }
3654 ClosureReason::HolderForceClosed
3656 let logger = WithContext::from(&self.logger, Some(*peer_node_id), Some(*channel_id), None);
3657 if let hash_map::Entry::Occupied(chan_phase_entry) = peer_state.channel_by_id.entry(channel_id.clone()) {
3658 log_error!(logger, "Force-closing channel {}", channel_id);
3659 let mut chan_phase = remove_channel_phase!(self, chan_phase_entry);
3660 mem::drop(peer_state);
3661 mem::drop(per_peer_state);
3663 ChannelPhase::Funded(mut chan) => {
3664 self.finish_close_channel(chan.context.force_shutdown(broadcast, closure_reason));
3665 (self.get_channel_update_for_broadcast(&chan).ok(), chan.context.get_counterparty_node_id())
3667 ChannelPhase::UnfundedOutboundV1(_) | ChannelPhase::UnfundedInboundV1(_) => {
3668 self.finish_close_channel(chan_phase.context_mut().force_shutdown(false, closure_reason));
3669 // Unfunded channel has no update
3670 (None, chan_phase.context().get_counterparty_node_id())
3672 // TODO(dual_funding): Combine this match arm with above once #[cfg(any(dual_funding, splicing))] is removed.
3673 #[cfg(any(dual_funding, splicing))]
3674 ChannelPhase::UnfundedOutboundV2(_) | ChannelPhase::UnfundedInboundV2(_) => {
3675 self.finish_close_channel(chan_phase.context_mut().force_shutdown(false, closure_reason));
3676 // Unfunded channel has no update
3677 (None, chan_phase.context().get_counterparty_node_id())
3680 } else if peer_state.inbound_channel_request_by_id.remove(channel_id).is_some() {
3681 log_error!(logger, "Force-closing channel {}", &channel_id);
3682 // N.B. that we don't send any channel close event here: we
3683 // don't have a user_channel_id, and we never sent any opening
3685 (None, *peer_node_id)
3687 return Err(APIError::ChannelUnavailable{ err: format!("Channel with id {} not found for the passed counterparty node_id {}", channel_id, peer_node_id) });
3690 if let Some(update) = update_opt {
3691 // If we have some Channel Update to broadcast, we cache it and broadcast it later.
3692 let mut pending_broadcast_messages = self.pending_broadcast_messages.lock().unwrap();
3693 pending_broadcast_messages.push(events::MessageSendEvent::BroadcastChannelUpdate {
3698 Ok(counterparty_node_id)
3701 fn force_close_sending_error(&self, channel_id: &ChannelId, counterparty_node_id: &PublicKey, broadcast: bool) -> Result<(), APIError> {
3702 let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
3703 match self.force_close_channel_with_peer(channel_id, counterparty_node_id, None, broadcast) {
3704 Ok(counterparty_node_id) => {
3705 let per_peer_state = self.per_peer_state.read().unwrap();
3706 if let Some(peer_state_mutex) = per_peer_state.get(&counterparty_node_id) {
3707 let mut peer_state = peer_state_mutex.lock().unwrap();
3708 peer_state.pending_msg_events.push(
3709 events::MessageSendEvent::HandleError {
3710 node_id: counterparty_node_id,
3711 action: msgs::ErrorAction::DisconnectPeer {
3712 msg: Some(msgs::ErrorMessage { channel_id: *channel_id, data: "Channel force-closed".to_owned() })
3723 /// Force closes a channel, immediately broadcasting the latest local transaction(s) and
3724 /// rejecting new HTLCs on the given channel. Fails if `channel_id` is unknown to
3725 /// the manager, or if the `counterparty_node_id` isn't the counterparty of the corresponding
3727 pub fn force_close_broadcasting_latest_txn(&self, channel_id: &ChannelId, counterparty_node_id: &PublicKey)
3728 -> Result<(), APIError> {
3729 self.force_close_sending_error(channel_id, counterparty_node_id, true)
3732 /// Force closes a channel, rejecting new HTLCs on the given channel but skips broadcasting
3733 /// the latest local transaction(s). Fails if `channel_id` is unknown to the manager, or if the
3734 /// `counterparty_node_id` isn't the counterparty of the corresponding channel.
3736 /// You can always broadcast the latest local transaction(s) via
3737 /// [`ChannelMonitor::broadcast_latest_holder_commitment_txn`].
3738 pub fn force_close_without_broadcasting_txn(&self, channel_id: &ChannelId, counterparty_node_id: &PublicKey)
3739 -> Result<(), APIError> {
3740 self.force_close_sending_error(channel_id, counterparty_node_id, false)
3743 /// Force close all channels, immediately broadcasting the latest local commitment transaction
3744 /// for each to the chain and rejecting new HTLCs on each.
3745 pub fn force_close_all_channels_broadcasting_latest_txn(&self) {
3746 for chan in self.list_channels() {
3747 let _ = self.force_close_broadcasting_latest_txn(&chan.channel_id, &chan.counterparty.node_id);
3751 /// Force close all channels rejecting new HTLCs on each but without broadcasting the latest
3752 /// local transaction(s).
3753 pub fn force_close_all_channels_without_broadcasting_txn(&self) {
3754 for chan in self.list_channels() {
3755 let _ = self.force_close_without_broadcasting_txn(&chan.channel_id, &chan.counterparty.node_id);
3759 fn can_forward_htlc_to_outgoing_channel(
3760 &self, chan: &mut Channel<SP>, msg: &msgs::UpdateAddHTLC, next_packet: &NextPacketDetails
3761 ) -> Result<(), (&'static str, u16, Option<msgs::ChannelUpdate>)> {
3762 if !chan.context.should_announce() && !self.default_configuration.accept_forwards_to_priv_channels {
3763 // Note that the behavior here should be identical to the above block - we
3764 // should NOT reveal the existence or non-existence of a private channel if
3765 // we don't allow forwards outbound over them.
3766 return Err(("Refusing to forward to a private channel based on our config.", 0x4000 | 10, None));
3768 if chan.context.get_channel_type().supports_scid_privacy() && next_packet.outgoing_scid != chan.context.outbound_scid_alias() {
3769 // `option_scid_alias` (referred to in LDK as `scid_privacy`) means
3770 // "refuse to forward unless the SCID alias was used", so we pretend
3771 // we don't have the channel here.
3772 return Err(("Refusing to forward over real channel SCID as our counterparty requested.", 0x4000 | 10, None));
3775 // Note that we could technically not return an error yet here and just hope
3776 // that the connection is reestablished or monitor updated by the time we get
3777 // around to doing the actual forward, but better to fail early if we can and
3778 // hopefully an attacker trying to path-trace payments cannot make this occur
3779 // on a small/per-node/per-channel scale.
3780 if !chan.context.is_live() { // channel_disabled
3781 // If the channel_update we're going to return is disabled (i.e. the
3782 // peer has been disabled for some time), return `channel_disabled`,
3783 // otherwise return `temporary_channel_failure`.
3784 let chan_update_opt = self.get_channel_update_for_onion(next_packet.outgoing_scid, chan).ok();
3785 if chan_update_opt.as_ref().map(|u| u.contents.flags & 2 == 2).unwrap_or(false) {
3786 return Err(("Forwarding channel has been disconnected for some time.", 0x1000 | 20, chan_update_opt));
3788 return Err(("Forwarding channel is not in a ready state.", 0x1000 | 7, chan_update_opt));
3791 if next_packet.outgoing_amt_msat < chan.context.get_counterparty_htlc_minimum_msat() { // amount_below_minimum
3792 let chan_update_opt = self.get_channel_update_for_onion(next_packet.outgoing_scid, chan).ok();
3793 return Err(("HTLC amount was below the htlc_minimum_msat", 0x1000 | 11, chan_update_opt));
3795 if let Err((err, code)) = chan.htlc_satisfies_config(msg, next_packet.outgoing_amt_msat, next_packet.outgoing_cltv_value) {
3796 let chan_update_opt = self.get_channel_update_for_onion(next_packet.outgoing_scid, chan).ok();
3797 return Err((err, code, chan_update_opt));
3803 /// Executes a callback `C` that returns some value `X` on the channel found with the given
3804 /// `scid`. `None` is returned when the channel is not found.
3805 fn do_funded_channel_callback<X, C: Fn(&mut Channel<SP>) -> X>(
3806 &self, scid: u64, callback: C,
3808 let (counterparty_node_id, channel_id) = match self.short_to_chan_info.read().unwrap().get(&scid).cloned() {
3809 None => return None,
3810 Some((cp_id, id)) => (cp_id, id),
3812 let per_peer_state = self.per_peer_state.read().unwrap();
3813 let peer_state_mutex_opt = per_peer_state.get(&counterparty_node_id);
3814 if peer_state_mutex_opt.is_none() {
3817 let mut peer_state_lock = peer_state_mutex_opt.unwrap().lock().unwrap();
3818 let peer_state = &mut *peer_state_lock;
3819 match peer_state.channel_by_id.get_mut(&channel_id).and_then(
3820 |chan_phase| if let ChannelPhase::Funded(chan) = chan_phase { Some(chan) } else { None }
3823 Some(chan) => Some(callback(chan)),
3827 fn can_forward_htlc(
3828 &self, msg: &msgs::UpdateAddHTLC, next_packet_details: &NextPacketDetails
3829 ) -> Result<(), (&'static str, u16, Option<msgs::ChannelUpdate>)> {
3830 match self.do_funded_channel_callback(next_packet_details.outgoing_scid, |chan: &mut Channel<SP>| {
3831 self.can_forward_htlc_to_outgoing_channel(chan, msg, next_packet_details)
3834 Some(Err(e)) => return Err(e),
3836 // If we couldn't find the channel info for the scid, it may be a phantom or
3837 // intercept forward.
3838 if (self.default_configuration.accept_intercept_htlcs &&
3839 fake_scid::is_valid_intercept(&self.fake_scid_rand_bytes, next_packet_details.outgoing_scid, &self.chain_hash)) ||
3840 fake_scid::is_valid_phantom(&self.fake_scid_rand_bytes, next_packet_details.outgoing_scid, &self.chain_hash)
3842 return Err(("Don't have available channel for forwarding as requested.", 0x4000 | 10, None));
3847 let cur_height = self.best_block.read().unwrap().height + 1;
3848 if let Err((err_msg, err_code)) = check_incoming_htlc_cltv(
3849 cur_height, next_packet_details.outgoing_cltv_value, msg.cltv_expiry
3851 let chan_update_opt = self.do_funded_channel_callback(next_packet_details.outgoing_scid, |chan: &mut Channel<SP>| {
3852 self.get_channel_update_for_onion(next_packet_details.outgoing_scid, chan).ok()
3854 return Err((err_msg, err_code, chan_update_opt));
3860 fn htlc_failure_from_update_add_err(
3861 &self, msg: &msgs::UpdateAddHTLC, counterparty_node_id: &PublicKey, err_msg: &'static str,
3862 mut err_code: u16, chan_update: Option<msgs::ChannelUpdate>, is_intro_node_blinded_forward: bool,
3863 shared_secret: &[u8; 32]
3864 ) -> HTLCFailureMsg {
3865 let mut res = VecWriter(Vec::with_capacity(chan_update.serialized_length() + 2 + 8 + 2));
3866 if chan_update.is_some() && err_code & 0x1000 == 0x1000 {
3867 let chan_update = chan_update.unwrap();
3868 if err_code == 0x1000 | 11 || err_code == 0x1000 | 12 {
3869 msg.amount_msat.write(&mut res).expect("Writes cannot fail");
3871 else if err_code == 0x1000 | 13 {
3872 msg.cltv_expiry.write(&mut res).expect("Writes cannot fail");
3874 else if err_code == 0x1000 | 20 {
3875 // TODO: underspecified, follow https://github.com/lightning/bolts/issues/791
3876 0u16.write(&mut res).expect("Writes cannot fail");
3878 (chan_update.serialized_length() as u16 + 2).write(&mut res).expect("Writes cannot fail");
3879 msgs::ChannelUpdate::TYPE.write(&mut res).expect("Writes cannot fail");
3880 chan_update.write(&mut res).expect("Writes cannot fail");
3881 } else if err_code & 0x1000 == 0x1000 {
3882 // If we're trying to return an error that requires a `channel_update` but
3883 // we're forwarding to a phantom or intercept "channel" (i.e. cannot
3884 // generate an update), just use the generic "temporary_node_failure"
3886 err_code = 0x2000 | 2;
3890 WithContext::from(&self.logger, Some(*counterparty_node_id), Some(msg.channel_id), Some(msg.payment_hash)),
3891 "Failed to accept/forward incoming HTLC: {}", err_msg
3893 // If `msg.blinding_point` is set, we must always fail with malformed.
3894 if msg.blinding_point.is_some() {
3895 return HTLCFailureMsg::Malformed(msgs::UpdateFailMalformedHTLC {
3896 channel_id: msg.channel_id,
3897 htlc_id: msg.htlc_id,
3898 sha256_of_onion: [0; 32],
3899 failure_code: INVALID_ONION_BLINDING,
3903 let (err_code, err_data) = if is_intro_node_blinded_forward {
3904 (INVALID_ONION_BLINDING, &[0; 32][..])
3906 (err_code, &res.0[..])
3908 HTLCFailureMsg::Relay(msgs::UpdateFailHTLC {
3909 channel_id: msg.channel_id,
3910 htlc_id: msg.htlc_id,
3911 reason: HTLCFailReason::reason(err_code, err_data.to_vec())
3912 .get_encrypted_failure_packet(shared_secret, &None),
3916 fn decode_update_add_htlc_onion(
3917 &self, msg: &msgs::UpdateAddHTLC, counterparty_node_id: &PublicKey,
3919 (onion_utils::Hop, [u8; 32], Option<Result<PublicKey, secp256k1::Error>>), HTLCFailureMsg
3921 let (next_hop, shared_secret, next_packet_details_opt) = decode_incoming_update_add_htlc_onion(
3922 msg, &self.node_signer, &self.logger, &self.secp_ctx
3925 let next_packet_details = match next_packet_details_opt {
3926 Some(next_packet_details) => next_packet_details,
3927 // it is a receive, so no need for outbound checks
3928 None => return Ok((next_hop, shared_secret, None)),
3931 // Perform outbound checks here instead of in [`Self::construct_pending_htlc_info`] because we
3932 // can't hold the outbound peer state lock at the same time as the inbound peer state lock.
3933 self.can_forward_htlc(&msg, &next_packet_details).map_err(|e| {
3934 let (err_msg, err_code, chan_update_opt) = e;
3935 self.htlc_failure_from_update_add_err(
3936 msg, counterparty_node_id, err_msg, err_code, chan_update_opt,
3937 next_hop.is_intro_node_blinded_forward(), &shared_secret
3941 Ok((next_hop, shared_secret, Some(next_packet_details.next_packet_pubkey)))
3944 fn construct_pending_htlc_status<'a>(
3945 &self, msg: &msgs::UpdateAddHTLC, counterparty_node_id: &PublicKey, shared_secret: [u8; 32],
3946 decoded_hop: onion_utils::Hop, allow_underpay: bool,
3947 next_packet_pubkey_opt: Option<Result<PublicKey, secp256k1::Error>>,
3948 ) -> PendingHTLCStatus {
3949 macro_rules! return_err {
3950 ($msg: expr, $err_code: expr, $data: expr) => {
3952 let logger = WithContext::from(&self.logger, Some(*counterparty_node_id), Some(msg.channel_id), Some(msg.payment_hash));
3953 log_info!(logger, "Failed to accept/forward incoming HTLC: {}", $msg);
3954 if msg.blinding_point.is_some() {
3955 return PendingHTLCStatus::Fail(HTLCFailureMsg::Malformed(
3956 msgs::UpdateFailMalformedHTLC {
3957 channel_id: msg.channel_id,
3958 htlc_id: msg.htlc_id,
3959 sha256_of_onion: [0; 32],
3960 failure_code: INVALID_ONION_BLINDING,
3964 return PendingHTLCStatus::Fail(HTLCFailureMsg::Relay(msgs::UpdateFailHTLC {
3965 channel_id: msg.channel_id,
3966 htlc_id: msg.htlc_id,
3967 reason: HTLCFailReason::reason($err_code, $data.to_vec())
3968 .get_encrypted_failure_packet(&shared_secret, &None),
3974 onion_utils::Hop::Receive(next_hop_data) => {
3976 let current_height: u32 = self.best_block.read().unwrap().height;
3977 match create_recv_pending_htlc_info(next_hop_data, shared_secret, msg.payment_hash,
3978 msg.amount_msat, msg.cltv_expiry, None, allow_underpay, msg.skimmed_fee_msat,
3979 current_height, self.default_configuration.accept_mpp_keysend)
3982 // Note that we could obviously respond immediately with an update_fulfill_htlc
3983 // message, however that would leak that we are the recipient of this payment, so
3984 // instead we stay symmetric with the forwarding case, only responding (after a
3985 // delay) once they've send us a commitment_signed!
3986 PendingHTLCStatus::Forward(info)
3988 Err(InboundHTLCErr { err_code, err_data, msg }) => return_err!(msg, err_code, &err_data)
3991 onion_utils::Hop::Forward { next_hop_data, next_hop_hmac, new_packet_bytes } => {
3992 match create_fwd_pending_htlc_info(msg, next_hop_data, next_hop_hmac,
3993 new_packet_bytes, shared_secret, next_packet_pubkey_opt) {
3994 Ok(info) => PendingHTLCStatus::Forward(info),
3995 Err(InboundHTLCErr { err_code, err_data, msg }) => return_err!(msg, err_code, &err_data)
4001 /// Gets the current [`channel_update`] for the given channel. This first checks if the channel is
4002 /// public, and thus should be called whenever the result is going to be passed out in a
4003 /// [`MessageSendEvent::BroadcastChannelUpdate`] event.
4005 /// Note that in [`internal_closing_signed`], this function is called without the `peer_state`
4006 /// corresponding to the channel's counterparty locked, as the channel been removed from the
4007 /// storage and the `peer_state` lock has been dropped.
4009 /// [`channel_update`]: msgs::ChannelUpdate
4010 /// [`internal_closing_signed`]: Self::internal_closing_signed
4011 fn get_channel_update_for_broadcast(&self, chan: &Channel<SP>) -> Result<msgs::ChannelUpdate, LightningError> {
4012 if !chan.context.should_announce() {
4013 return Err(LightningError {
4014 err: "Cannot broadcast a channel_update for a private channel".to_owned(),
4015 action: msgs::ErrorAction::IgnoreError
4018 if chan.context.get_short_channel_id().is_none() {
4019 return Err(LightningError{err: "Channel not yet established".to_owned(), action: msgs::ErrorAction::IgnoreError});
4021 let logger = WithChannelContext::from(&self.logger, &chan.context, None);
4022 log_trace!(logger, "Attempting to generate broadcast channel update for channel {}", &chan.context.channel_id());
4023 self.get_channel_update_for_unicast(chan)
4026 /// Gets the current [`channel_update`] for the given channel. This does not check if the channel
4027 /// is public (only returning an `Err` if the channel does not yet have an assigned SCID),
4028 /// and thus MUST NOT be called unless the recipient of the resulting message has already
4029 /// provided evidence that they know about the existence of the channel.
4031 /// Note that through [`internal_closing_signed`], this function is called without the
4032 /// `peer_state` corresponding to the channel's counterparty locked, as the channel been
4033 /// removed from the storage and the `peer_state` lock has been dropped.
4035 /// [`channel_update`]: msgs::ChannelUpdate
4036 /// [`internal_closing_signed`]: Self::internal_closing_signed
4037 fn get_channel_update_for_unicast(&self, chan: &Channel<SP>) -> Result<msgs::ChannelUpdate, LightningError> {
4038 let logger = WithChannelContext::from(&self.logger, &chan.context, None);
4039 log_trace!(logger, "Attempting to generate channel update for channel {}", chan.context.channel_id());
4040 let short_channel_id = match chan.context.get_short_channel_id().or(chan.context.latest_inbound_scid_alias()) {
4041 None => return Err(LightningError{err: "Channel not yet established".to_owned(), action: msgs::ErrorAction::IgnoreError}),
4045 self.get_channel_update_for_onion(short_channel_id, chan)
4048 fn get_channel_update_for_onion(&self, short_channel_id: u64, chan: &Channel<SP>) -> Result<msgs::ChannelUpdate, LightningError> {
4049 let logger = WithChannelContext::from(&self.logger, &chan.context, None);
4050 log_trace!(logger, "Generating channel update for channel {}", chan.context.channel_id());
4051 let were_node_one = self.our_network_pubkey.serialize()[..] < chan.context.get_counterparty_node_id().serialize()[..];
4053 let enabled = chan.context.is_usable() && match chan.channel_update_status() {
4054 ChannelUpdateStatus::Enabled => true,
4055 ChannelUpdateStatus::DisabledStaged(_) => true,
4056 ChannelUpdateStatus::Disabled => false,
4057 ChannelUpdateStatus::EnabledStaged(_) => false,
4060 let unsigned = msgs::UnsignedChannelUpdate {
4061 chain_hash: self.chain_hash,
4063 timestamp: chan.context.get_update_time_counter(),
4064 flags: (!were_node_one) as u8 | ((!enabled as u8) << 1),
4065 cltv_expiry_delta: chan.context.get_cltv_expiry_delta(),
4066 htlc_minimum_msat: chan.context.get_counterparty_htlc_minimum_msat(),
4067 htlc_maximum_msat: chan.context.get_announced_htlc_max_msat(),
4068 fee_base_msat: chan.context.get_outbound_forwarding_fee_base_msat(),
4069 fee_proportional_millionths: chan.context.get_fee_proportional_millionths(),
4070 excess_data: Vec::new(),
4072 // Panic on failure to signal LDK should be restarted to retry signing the `ChannelUpdate`.
4073 // If we returned an error and the `node_signer` cannot provide a signature for whatever
4074 // reason`, we wouldn't be able to receive inbound payments through the corresponding
4076 let sig = self.node_signer.sign_gossip_message(msgs::UnsignedGossipMessage::ChannelUpdate(&unsigned)).unwrap();
4078 Ok(msgs::ChannelUpdate {
4085 pub(crate) fn test_send_payment_along_path(&self, path: &Path, payment_hash: &PaymentHash, recipient_onion: RecipientOnionFields, total_value: u64, cur_height: u32, payment_id: PaymentId, keysend_preimage: &Option<PaymentPreimage>, session_priv_bytes: [u8; 32]) -> Result<(), APIError> {
4086 let _lck = self.total_consistency_lock.read().unwrap();
4087 self.send_payment_along_path(SendAlongPathArgs {
4088 path, payment_hash, recipient_onion: &recipient_onion, total_value,
4089 cur_height, payment_id, keysend_preimage, session_priv_bytes
4093 fn send_payment_along_path(&self, args: SendAlongPathArgs) -> Result<(), APIError> {
4094 let SendAlongPathArgs {
4095 path, payment_hash, recipient_onion, total_value, cur_height, payment_id, keysend_preimage,
4098 // The top-level caller should hold the total_consistency_lock read lock.
4099 debug_assert!(self.total_consistency_lock.try_write().is_err());
4100 let prng_seed = self.entropy_source.get_secure_random_bytes();
4101 let session_priv = SecretKey::from_slice(&session_priv_bytes[..]).expect("RNG is busted");
4103 let (onion_packet, htlc_msat, htlc_cltv) = onion_utils::create_payment_onion(
4104 &self.secp_ctx, &path, &session_priv, total_value, recipient_onion, cur_height,
4105 payment_hash, keysend_preimage, prng_seed
4107 let logger = WithContext::from(&self.logger, Some(path.hops.first().unwrap().pubkey), None, Some(*payment_hash));
4108 log_error!(logger, "Failed to build an onion for path for payment hash {}", payment_hash);
4112 let err: Result<(), _> = loop {
4113 let (counterparty_node_id, id) = match self.short_to_chan_info.read().unwrap().get(&path.hops.first().unwrap().short_channel_id) {
4115 let logger = WithContext::from(&self.logger, Some(path.hops.first().unwrap().pubkey), None, Some(*payment_hash));
4116 log_error!(logger, "Failed to find first-hop for payment hash {}", payment_hash);
4117 return Err(APIError::ChannelUnavailable{err: "No channel available with first hop!".to_owned()})
4119 Some((cp_id, chan_id)) => (cp_id.clone(), chan_id.clone()),
4122 let logger = WithContext::from(&self.logger, Some(counterparty_node_id), Some(id), Some(*payment_hash));
4124 "Attempting to send payment with payment hash {} along path with next hop {}",
4125 payment_hash, path.hops.first().unwrap().short_channel_id);
4127 let per_peer_state = self.per_peer_state.read().unwrap();
4128 let peer_state_mutex = per_peer_state.get(&counterparty_node_id)
4129 .ok_or_else(|| APIError::ChannelUnavailable{err: "No peer matching the path's first hop found!".to_owned() })?;
4130 let mut peer_state_lock = peer_state_mutex.lock().unwrap();
4131 let peer_state = &mut *peer_state_lock;
4132 if let hash_map::Entry::Occupied(mut chan_phase_entry) = peer_state.channel_by_id.entry(id) {
4133 match chan_phase_entry.get_mut() {
4134 ChannelPhase::Funded(chan) => {
4135 if !chan.context.is_live() {
4136 return Err(APIError::ChannelUnavailable{err: "Peer for first hop currently disconnected".to_owned()});
4138 let funding_txo = chan.context.get_funding_txo().unwrap();
4139 let logger = WithChannelContext::from(&self.logger, &chan.context, Some(*payment_hash));
4140 let send_res = chan.send_htlc_and_commit(htlc_msat, payment_hash.clone(),
4141 htlc_cltv, HTLCSource::OutboundRoute {
4143 session_priv: session_priv.clone(),
4144 first_hop_htlc_msat: htlc_msat,
4146 }, onion_packet, None, &self.fee_estimator, &&logger);
4147 match break_chan_phase_entry!(self, send_res, chan_phase_entry) {
4148 Some(monitor_update) => {
4149 match handle_new_monitor_update!(self, funding_txo, monitor_update, peer_state_lock, peer_state, per_peer_state, chan) {
4151 // Note that MonitorUpdateInProgress here indicates (per function
4152 // docs) that we will resend the commitment update once monitor
4153 // updating completes. Therefore, we must return an error
4154 // indicating that it is unsafe to retry the payment wholesale,
4155 // which we do in the send_payment check for
4156 // MonitorUpdateInProgress, below.
4157 return Err(APIError::MonitorUpdateInProgress);
4165 _ => return Err(APIError::ChannelUnavailable{err: "Channel to first hop is unfunded".to_owned()}),
4168 // The channel was likely removed after we fetched the id from the
4169 // `short_to_chan_info` map, but before we successfully locked the
4170 // `channel_by_id` map.
4171 // This can occur as no consistency guarantees exists between the two maps.
4172 return Err(APIError::ChannelUnavailable{err: "No channel available with first hop!".to_owned()});
4176 match handle_error!(self, err, path.hops.first().unwrap().pubkey) {
4177 Ok(_) => unreachable!(),
4179 Err(APIError::ChannelUnavailable { err: e.err })
4184 /// Sends a payment along a given route.
4186 /// Value parameters are provided via the last hop in route, see documentation for [`RouteHop`]
4187 /// fields for more info.
4189 /// May generate [`UpdateHTLCs`] message(s) event on success, which should be relayed (e.g. via
4190 /// [`PeerManager::process_events`]).
4192 /// # Avoiding Duplicate Payments
4194 /// If a pending payment is currently in-flight with the same [`PaymentId`] provided, this
4195 /// method will error with an [`APIError::InvalidRoute`]. Note, however, that once a payment
4196 /// is no longer pending (either via [`ChannelManager::abandon_payment`], or handling of an
4197 /// [`Event::PaymentSent`] or [`Event::PaymentFailed`]) LDK will not stop you from sending a
4198 /// second payment with the same [`PaymentId`].
4200 /// Thus, in order to ensure duplicate payments are not sent, you should implement your own
4201 /// tracking of payments, including state to indicate once a payment has completed. Because you
4202 /// should also ensure that [`PaymentHash`]es are not re-used, for simplicity, you should
4203 /// consider using the [`PaymentHash`] as the key for tracking payments. In that case, the
4204 /// [`PaymentId`] should be a copy of the [`PaymentHash`] bytes.
4206 /// Additionally, in the scenario where we begin the process of sending a payment, but crash
4207 /// before `send_payment` returns (or prior to [`ChannelMonitorUpdate`] persistence if you're
4208 /// using [`ChannelMonitorUpdateStatus::InProgress`]), the payment may be lost on restart. See
4209 /// [`ChannelManager::list_recent_payments`] for more information.
4211 /// # Possible Error States on [`PaymentSendFailure`]
4213 /// Each path may have a different return value, and [`PaymentSendFailure`] may return a `Vec` with
4214 /// each entry matching the corresponding-index entry in the route paths, see
4215 /// [`PaymentSendFailure`] for more info.
4217 /// In general, a path may raise:
4218 /// * [`APIError::InvalidRoute`] when an invalid route or forwarding parameter (cltv_delta, fee,
4219 /// node public key) is specified.
4220 /// * [`APIError::ChannelUnavailable`] if the next-hop channel is not available as it has been
4221 /// closed, doesn't exist, or the peer is currently disconnected.
4222 /// * [`APIError::MonitorUpdateInProgress`] if a new monitor update failure prevented sending the
4223 /// relevant updates.
4225 /// Note that depending on the type of the [`PaymentSendFailure`] the HTLC may have been
4226 /// irrevocably committed to on our end. In such a case, do NOT retry the payment with a
4227 /// different route unless you intend to pay twice!
4229 /// [`RouteHop`]: crate::routing::router::RouteHop
4230 /// [`Event::PaymentSent`]: events::Event::PaymentSent
4231 /// [`Event::PaymentFailed`]: events::Event::PaymentFailed
4232 /// [`UpdateHTLCs`]: events::MessageSendEvent::UpdateHTLCs
4233 /// [`PeerManager::process_events`]: crate::ln::peer_handler::PeerManager::process_events
4234 /// [`ChannelMonitorUpdateStatus::InProgress`]: crate::chain::ChannelMonitorUpdateStatus::InProgress
4235 pub fn send_payment_with_route(&self, route: &Route, payment_hash: PaymentHash, recipient_onion: RecipientOnionFields, payment_id: PaymentId) -> Result<(), PaymentSendFailure> {
4236 let best_block_height = self.best_block.read().unwrap().height;
4237 let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
4238 self.pending_outbound_payments
4239 .send_payment_with_route(route, payment_hash, recipient_onion, payment_id,
4240 &self.entropy_source, &self.node_signer, best_block_height,
4241 |args| self.send_payment_along_path(args))
4244 /// Similar to [`ChannelManager::send_payment_with_route`], but will automatically find a route based on
4245 /// `route_params` and retry failed payment paths based on `retry_strategy`.
4246 pub fn send_payment(&self, payment_hash: PaymentHash, recipient_onion: RecipientOnionFields, payment_id: PaymentId, route_params: RouteParameters, retry_strategy: Retry) -> Result<(), RetryableSendFailure> {
4247 let best_block_height = self.best_block.read().unwrap().height;
4248 let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
4249 self.pending_outbound_payments
4250 .send_payment(payment_hash, recipient_onion, payment_id, retry_strategy, route_params,
4251 &self.router, self.list_usable_channels(), || self.compute_inflight_htlcs(),
4252 &self.entropy_source, &self.node_signer, best_block_height, &self.logger,
4253 &self.pending_events, |args| self.send_payment_along_path(args))
4257 pub(super) fn test_send_payment_internal(&self, route: &Route, payment_hash: PaymentHash, recipient_onion: RecipientOnionFields, keysend_preimage: Option<PaymentPreimage>, payment_id: PaymentId, recv_value_msat: Option<u64>, onion_session_privs: Vec<[u8; 32]>) -> Result<(), PaymentSendFailure> {
4258 let best_block_height = self.best_block.read().unwrap().height;
4259 let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
4260 self.pending_outbound_payments.test_send_payment_internal(route, payment_hash, recipient_onion,
4261 keysend_preimage, payment_id, recv_value_msat, onion_session_privs, &self.node_signer,
4262 best_block_height, |args| self.send_payment_along_path(args))
4266 pub(crate) fn test_add_new_pending_payment(&self, payment_hash: PaymentHash, recipient_onion: RecipientOnionFields, payment_id: PaymentId, route: &Route) -> Result<Vec<[u8; 32]>, PaymentSendFailure> {
4267 let best_block_height = self.best_block.read().unwrap().height;
4268 self.pending_outbound_payments.test_add_new_pending_payment(payment_hash, recipient_onion, payment_id, route, None, &self.entropy_source, best_block_height)
4272 pub(crate) fn test_set_payment_metadata(&self, payment_id: PaymentId, new_payment_metadata: Option<Vec<u8>>) {
4273 self.pending_outbound_payments.test_set_payment_metadata(payment_id, new_payment_metadata);
4276 pub(super) fn send_payment_for_bolt12_invoice(&self, invoice: &Bolt12Invoice, payment_id: PaymentId) -> Result<(), Bolt12PaymentError> {
4277 let best_block_height = self.best_block.read().unwrap().height;
4278 let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
4279 self.pending_outbound_payments
4280 .send_payment_for_bolt12_invoice(
4281 invoice, payment_id, &self.router, self.list_usable_channels(),
4282 || self.compute_inflight_htlcs(), &self.entropy_source, &self.node_signer,
4283 best_block_height, &self.logger, &self.pending_events,
4284 |args| self.send_payment_along_path(args)
4288 /// Signals that no further attempts for the given payment should occur. Useful if you have a
4289 /// pending outbound payment with retries remaining, but wish to stop retrying the payment before
4290 /// retries are exhausted.
4292 /// # Event Generation
4294 /// If no [`Event::PaymentFailed`] event had been generated before, one will be generated as soon
4295 /// as there are no remaining pending HTLCs for this payment.
4297 /// Note that calling this method does *not* prevent a payment from succeeding. You must still
4298 /// wait until you receive either a [`Event::PaymentFailed`] or [`Event::PaymentSent`] event to
4299 /// determine the ultimate status of a payment.
4301 /// # Requested Invoices
4303 /// In the case of paying a [`Bolt12Invoice`] via [`ChannelManager::pay_for_offer`], abandoning
4304 /// the payment prior to receiving the invoice will result in an [`Event::InvoiceRequestFailed`]
4305 /// and prevent any attempts at paying it once received. The other events may only be generated
4306 /// once the invoice has been received.
4308 /// # Restart Behavior
4310 /// If an [`Event::PaymentFailed`] is generated and we restart without first persisting the
4311 /// [`ChannelManager`], another [`Event::PaymentFailed`] may be generated; likewise for
4312 /// [`Event::InvoiceRequestFailed`].
4314 /// [`Bolt12Invoice`]: crate::offers::invoice::Bolt12Invoice
4315 pub fn abandon_payment(&self, payment_id: PaymentId) {
4316 let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
4317 self.pending_outbound_payments.abandon_payment(payment_id, PaymentFailureReason::UserAbandoned, &self.pending_events);
4320 /// Send a spontaneous payment, which is a payment that does not require the recipient to have
4321 /// generated an invoice. Optionally, you may specify the preimage. If you do choose to specify
4322 /// the preimage, it must be a cryptographically secure random value that no intermediate node
4323 /// would be able to guess -- otherwise, an intermediate node may claim the payment and it will
4324 /// never reach the recipient.
4326 /// See [`send_payment`] documentation for more details on the return value of this function
4327 /// and idempotency guarantees provided by the [`PaymentId`] key.
4329 /// Similar to regular payments, you MUST NOT reuse a `payment_preimage` value. See
4330 /// [`send_payment`] for more information about the risks of duplicate preimage usage.
4332 /// [`send_payment`]: Self::send_payment
4333 pub fn send_spontaneous_payment(&self, route: &Route, payment_preimage: Option<PaymentPreimage>, recipient_onion: RecipientOnionFields, payment_id: PaymentId) -> Result<PaymentHash, PaymentSendFailure> {
4334 let best_block_height = self.best_block.read().unwrap().height;
4335 let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
4336 self.pending_outbound_payments.send_spontaneous_payment_with_route(
4337 route, payment_preimage, recipient_onion, payment_id, &self.entropy_source,
4338 &self.node_signer, best_block_height, |args| self.send_payment_along_path(args))
4341 /// Similar to [`ChannelManager::send_spontaneous_payment`], but will automatically find a route
4342 /// based on `route_params` and retry failed payment paths based on `retry_strategy`.
4344 /// See [`PaymentParameters::for_keysend`] for help in constructing `route_params` for spontaneous
4347 /// [`PaymentParameters::for_keysend`]: crate::routing::router::PaymentParameters::for_keysend
4348 pub fn send_spontaneous_payment_with_retry(&self, payment_preimage: Option<PaymentPreimage>, recipient_onion: RecipientOnionFields, payment_id: PaymentId, route_params: RouteParameters, retry_strategy: Retry) -> Result<PaymentHash, RetryableSendFailure> {
4349 let best_block_height = self.best_block.read().unwrap().height;
4350 let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
4351 self.pending_outbound_payments.send_spontaneous_payment(payment_preimage, recipient_onion,
4352 payment_id, retry_strategy, route_params, &self.router, self.list_usable_channels(),
4353 || self.compute_inflight_htlcs(), &self.entropy_source, &self.node_signer, best_block_height,
4354 &self.logger, &self.pending_events, |args| self.send_payment_along_path(args))
4357 /// Send a payment that is probing the given route for liquidity. We calculate the
4358 /// [`PaymentHash`] of probes based on a static secret and a random [`PaymentId`], which allows
4359 /// us to easily discern them from real payments.
4360 pub fn send_probe(&self, path: Path) -> Result<(PaymentHash, PaymentId), PaymentSendFailure> {
4361 let best_block_height = self.best_block.read().unwrap().height;
4362 let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
4363 self.pending_outbound_payments.send_probe(path, self.probing_cookie_secret,
4364 &self.entropy_source, &self.node_signer, best_block_height,
4365 |args| self.send_payment_along_path(args))
4368 /// Returns whether a payment with the given [`PaymentHash`] and [`PaymentId`] is, in fact, a
4371 pub(crate) fn payment_is_probe(&self, payment_hash: &PaymentHash, payment_id: &PaymentId) -> bool {
4372 outbound_payment::payment_is_probe(payment_hash, payment_id, self.probing_cookie_secret)
4375 /// Sends payment probes over all paths of a route that would be used to pay the given
4376 /// amount to the given `node_id`.
4378 /// See [`ChannelManager::send_preflight_probes`] for more information.
4379 pub fn send_spontaneous_preflight_probes(
4380 &self, node_id: PublicKey, amount_msat: u64, final_cltv_expiry_delta: u32,
4381 liquidity_limit_multiplier: Option<u64>,
4382 ) -> Result<Vec<(PaymentHash, PaymentId)>, ProbeSendFailure> {
4383 let payment_params =
4384 PaymentParameters::from_node_id(node_id, final_cltv_expiry_delta);
4386 let route_params = RouteParameters::from_payment_params_and_value(payment_params, amount_msat);
4388 self.send_preflight_probes(route_params, liquidity_limit_multiplier)
4391 /// Sends payment probes over all paths of a route that would be used to pay a route found
4392 /// according to the given [`RouteParameters`].
4394 /// This may be used to send "pre-flight" probes, i.e., to train our scorer before conducting
4395 /// the actual payment. Note this is only useful if there likely is sufficient time for the
4396 /// probe to settle before sending out the actual payment, e.g., when waiting for user
4397 /// confirmation in a wallet UI.
4399 /// Otherwise, there is a chance the probe could take up some liquidity needed to complete the
4400 /// actual payment. Users should therefore be cautious and might avoid sending probes if
4401 /// liquidity is scarce and/or they don't expect the probe to return before they send the
4402 /// payment. To mitigate this issue, channels with available liquidity less than the required
4403 /// amount times the given `liquidity_limit_multiplier` won't be used to send pre-flight
4404 /// probes. If `None` is given as `liquidity_limit_multiplier`, it defaults to `3`.
4405 pub fn send_preflight_probes(
4406 &self, route_params: RouteParameters, liquidity_limit_multiplier: Option<u64>,
4407 ) -> Result<Vec<(PaymentHash, PaymentId)>, ProbeSendFailure> {
4408 let liquidity_limit_multiplier = liquidity_limit_multiplier.unwrap_or(3);
4410 let payer = self.get_our_node_id();
4411 let usable_channels = self.list_usable_channels();
4412 let first_hops = usable_channels.iter().collect::<Vec<_>>();
4413 let inflight_htlcs = self.compute_inflight_htlcs();
4417 .find_route(&payer, &route_params, Some(&first_hops), inflight_htlcs)
4419 log_error!(self.logger, "Failed to find path for payment probe: {:?}", e);
4420 ProbeSendFailure::RouteNotFound
4423 let mut used_liquidity_map = hash_map_with_capacity(first_hops.len());
4425 let mut res = Vec::new();
4427 for mut path in route.paths {
4428 // If the last hop is probably an unannounced channel we refrain from probing all the
4429 // way through to the end and instead probe up to the second-to-last channel.
4430 while let Some(last_path_hop) = path.hops.last() {
4431 if last_path_hop.maybe_announced_channel {
4432 // We found a potentially announced last hop.
4435 // Drop the last hop, as it's likely unannounced.
4438 "Avoided sending payment probe all the way to last hop {} as it is likely unannounced.",
4439 last_path_hop.short_channel_id
4441 let final_value_msat = path.final_value_msat();
4443 if let Some(new_last) = path.hops.last_mut() {
4444 new_last.fee_msat += final_value_msat;
4449 if path.hops.len() < 2 {
4452 "Skipped sending payment probe over path with less than two hops."
4457 if let Some(first_path_hop) = path.hops.first() {
4458 if let Some(first_hop) = first_hops.iter().find(|h| {
4459 h.get_outbound_payment_scid() == Some(first_path_hop.short_channel_id)
4461 let path_value = path.final_value_msat() + path.fee_msat();
4462 let used_liquidity =
4463 used_liquidity_map.entry(first_path_hop.short_channel_id).or_insert(0);
4465 if first_hop.next_outbound_htlc_limit_msat
4466 < (*used_liquidity + path_value) * liquidity_limit_multiplier
4468 log_debug!(self.logger, "Skipped sending payment probe to avoid putting channel {} under the liquidity limit.", first_path_hop.short_channel_id);
4471 *used_liquidity += path_value;
4476 res.push(self.send_probe(path).map_err(|e| {
4477 log_error!(self.logger, "Failed to send pre-flight probe: {:?}", e);
4478 ProbeSendFailure::SendingFailed(e)
4485 /// Handles the generation of a funding transaction, optionally (for tests) with a function
4486 /// which checks the correctness of the funding transaction given the associated channel.
4487 fn funding_transaction_generated_intern<FundingOutput: FnMut(&OutboundV1Channel<SP>, &Transaction) -> Result<OutPoint, &'static str>>(
4488 &self, temporary_channel_id: &ChannelId, counterparty_node_id: &PublicKey, funding_transaction: Transaction, is_batch_funding: bool,
4489 mut find_funding_output: FundingOutput,
4490 ) -> Result<(), APIError> {
4491 let per_peer_state = self.per_peer_state.read().unwrap();
4492 let peer_state_mutex = per_peer_state.get(counterparty_node_id)
4493 .ok_or_else(|| APIError::ChannelUnavailable { err: format!("Can't find a peer matching the passed counterparty node_id {}", counterparty_node_id) })?;
4495 let mut peer_state_lock = peer_state_mutex.lock().unwrap();
4496 let peer_state = &mut *peer_state_lock;
4498 let (mut chan, msg_opt) = match peer_state.channel_by_id.remove(temporary_channel_id) {
4499 Some(ChannelPhase::UnfundedOutboundV1(mut chan)) => {
4500 macro_rules! close_chan { ($err: expr, $api_err: expr, $chan: expr) => { {
4502 let err = if let ChannelError::Close(msg) = $err {
4503 let channel_id = $chan.context.channel_id();
4504 counterparty = chan.context.get_counterparty_node_id();
4505 let reason = ClosureReason::ProcessingError { err: msg.clone() };
4506 let shutdown_res = $chan.context.force_shutdown(false, reason);
4507 MsgHandleErrInternal::from_finish_shutdown(msg, channel_id, shutdown_res, None)
4508 } else { unreachable!(); };
4510 mem::drop(peer_state_lock);
4511 mem::drop(per_peer_state);
4512 let _: Result<(), _> = handle_error!(self, Err(err), counterparty);
4515 match find_funding_output(&chan, &funding_transaction) {
4516 Ok(found_funding_txo) => funding_txo = found_funding_txo,
4518 let chan_err = ChannelError::Close(err.to_owned());
4519 let api_err = APIError::APIMisuseError { err: err.to_owned() };
4520 return close_chan!(chan_err, api_err, chan);
4524 let logger = WithChannelContext::from(&self.logger, &chan.context, None);
4525 let funding_res = chan.get_funding_created(funding_transaction, funding_txo, is_batch_funding, &&logger);
4527 Ok(funding_msg) => (chan, funding_msg),
4528 Err((mut chan, chan_err)) => {
4529 let api_err = APIError::ChannelUnavailable { err: "Signer refused to sign the initial commitment transaction".to_owned() };
4530 return close_chan!(chan_err, api_err, chan);
4535 peer_state.channel_by_id.insert(*temporary_channel_id, phase);
4536 return Err(APIError::APIMisuseError {
4538 "Channel with id {} for the passed counterparty node_id {} is not an unfunded, outbound V1 channel",
4539 temporary_channel_id, counterparty_node_id),
4542 None => return Err(APIError::ChannelUnavailable {err: format!(
4543 "Channel with id {} not found for the passed counterparty node_id {}",
4544 temporary_channel_id, counterparty_node_id),
4548 if let Some(msg) = msg_opt {
4549 peer_state.pending_msg_events.push(events::MessageSendEvent::SendFundingCreated {
4550 node_id: chan.context.get_counterparty_node_id(),
4554 match peer_state.channel_by_id.entry(chan.context.channel_id()) {
4555 hash_map::Entry::Occupied(_) => {
4556 panic!("Generated duplicate funding txid?");
4558 hash_map::Entry::Vacant(e) => {
4559 let mut outpoint_to_peer = self.outpoint_to_peer.lock().unwrap();
4560 match outpoint_to_peer.entry(funding_txo) {
4561 hash_map::Entry::Vacant(e) => { e.insert(chan.context.get_counterparty_node_id()); },
4562 hash_map::Entry::Occupied(o) => {
4564 "An existing channel using outpoint {} is open with peer {}",
4565 funding_txo, o.get()
4567 mem::drop(outpoint_to_peer);
4568 mem::drop(peer_state_lock);
4569 mem::drop(per_peer_state);
4570 let reason = ClosureReason::ProcessingError { err: err.clone() };
4571 self.finish_close_channel(chan.context.force_shutdown(true, reason));
4572 return Err(APIError::ChannelUnavailable { err });
4575 e.insert(ChannelPhase::UnfundedOutboundV1(chan));
4582 pub(crate) fn funding_transaction_generated_unchecked(&self, temporary_channel_id: &ChannelId, counterparty_node_id: &PublicKey, funding_transaction: Transaction, output_index: u16) -> Result<(), APIError> {
4583 self.funding_transaction_generated_intern(temporary_channel_id, counterparty_node_id, funding_transaction, false, |_, tx| {
4584 Ok(OutPoint { txid: tx.txid(), index: output_index })
4588 /// Call this upon creation of a funding transaction for the given channel.
4590 /// Returns an [`APIError::APIMisuseError`] if the funding_transaction spent non-SegWit outputs
4591 /// or if no output was found which matches the parameters in [`Event::FundingGenerationReady`].
4593 /// Returns [`APIError::APIMisuseError`] if the funding transaction is not final for propagation
4594 /// across the p2p network.
4596 /// Returns [`APIError::ChannelUnavailable`] if a funding transaction has already been provided
4597 /// for the channel or if the channel has been closed as indicated by [`Event::ChannelClosed`].
4599 /// May panic if the output found in the funding transaction is duplicative with some other
4600 /// channel (note that this should be trivially prevented by using unique funding transaction
4601 /// keys per-channel).
4603 /// Do NOT broadcast the funding transaction yourself. When we have safely received our
4604 /// counterparty's signature the funding transaction will automatically be broadcast via the
4605 /// [`BroadcasterInterface`] provided when this `ChannelManager` was constructed.
4607 /// Note that this includes RBF or similar transaction replacement strategies - lightning does
4608 /// not currently support replacing a funding transaction on an existing channel. Instead,
4609 /// create a new channel with a conflicting funding transaction.
4611 /// Note to keep the miner incentives aligned in moving the blockchain forward, we recommend
4612 /// the wallet software generating the funding transaction to apply anti-fee sniping as
4613 /// implemented by Bitcoin Core wallet. See <https://bitcoinops.org/en/topics/fee-sniping/>
4614 /// for more details.
4616 /// [`Event::FundingGenerationReady`]: crate::events::Event::FundingGenerationReady
4617 /// [`Event::ChannelClosed`]: crate::events::Event::ChannelClosed
4618 pub fn funding_transaction_generated(&self, temporary_channel_id: &ChannelId, counterparty_node_id: &PublicKey, funding_transaction: Transaction) -> Result<(), APIError> {
4619 self.batch_funding_transaction_generated(&[(temporary_channel_id, counterparty_node_id)], funding_transaction)
4622 /// Call this upon creation of a batch funding transaction for the given channels.
4624 /// Return values are identical to [`Self::funding_transaction_generated`], respective to
4625 /// each individual channel and transaction output.
4627 /// Do NOT broadcast the funding transaction yourself. This batch funding transaction
4628 /// will only be broadcast when we have safely received and persisted the counterparty's
4629 /// signature for each channel.
4631 /// If there is an error, all channels in the batch are to be considered closed.
4632 pub fn batch_funding_transaction_generated(&self, temporary_channels: &[(&ChannelId, &PublicKey)], funding_transaction: Transaction) -> Result<(), APIError> {
4633 let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
4634 let mut result = Ok(());
4636 if !funding_transaction.is_coin_base() {
4637 for inp in funding_transaction.input.iter() {
4638 if inp.witness.is_empty() {
4639 result = result.and(Err(APIError::APIMisuseError {
4640 err: "Funding transaction must be fully signed and spend Segwit outputs".to_owned()
4645 if funding_transaction.output.len() > u16::max_value() as usize {
4646 result = result.and(Err(APIError::APIMisuseError {
4647 err: "Transaction had more than 2^16 outputs, which is not supported".to_owned()
4651 let height = self.best_block.read().unwrap().height;
4652 // Transactions are evaluated as final by network mempools if their locktime is strictly
4653 // lower than the next block height. However, the modules constituting our Lightning
4654 // node might not have perfect sync about their blockchain views. Thus, if the wallet
4655 // module is ahead of LDK, only allow one more block of headroom.
4656 if !funding_transaction.input.iter().all(|input| input.sequence == Sequence::MAX) &&
4657 funding_transaction.lock_time.is_block_height() &&
4658 funding_transaction.lock_time.to_consensus_u32() > height + 1
4660 result = result.and(Err(APIError::APIMisuseError {
4661 err: "Funding transaction absolute timelock is non-final".to_owned()
4666 let txid = funding_transaction.txid();
4667 let is_batch_funding = temporary_channels.len() > 1;
4668 let mut funding_batch_states = if is_batch_funding {
4669 Some(self.funding_batch_states.lock().unwrap())
4673 let mut funding_batch_state = funding_batch_states.as_mut().and_then(|states| {
4674 match states.entry(txid) {
4675 btree_map::Entry::Occupied(_) => {
4676 result = result.clone().and(Err(APIError::APIMisuseError {
4677 err: "Batch funding transaction with the same txid already exists".to_owned()
4681 btree_map::Entry::Vacant(vacant) => Some(vacant.insert(Vec::new())),
4684 for &(temporary_channel_id, counterparty_node_id) in temporary_channels {
4685 result = result.and_then(|_| self.funding_transaction_generated_intern(
4686 temporary_channel_id,
4687 counterparty_node_id,
4688 funding_transaction.clone(),
4691 let mut output_index = None;
4692 let expected_spk = chan.context.get_funding_redeemscript().to_v0_p2wsh();
4693 for (idx, outp) in tx.output.iter().enumerate() {
4694 if outp.script_pubkey == expected_spk && outp.value == chan.context.get_value_satoshis() {
4695 if output_index.is_some() {
4696 return Err("Multiple outputs matched the expected script and value");
4698 output_index = Some(idx as u16);
4701 if output_index.is_none() {
4702 return Err("No output matched the script_pubkey and value in the FundingGenerationReady event");
4704 let outpoint = OutPoint { txid: tx.txid(), index: output_index.unwrap() };
4705 if let Some(funding_batch_state) = funding_batch_state.as_mut() {
4706 // TODO(dual_funding): We only do batch funding for V1 channels at the moment, but we'll probably
4707 // need to fix this somehow to not rely on using the outpoint for the channel ID if we
4708 // want to support V2 batching here as well.
4709 funding_batch_state.push((ChannelId::v1_from_funding_outpoint(outpoint), *counterparty_node_id, false));
4715 if let Err(ref e) = result {
4716 // Remaining channels need to be removed on any error.
4717 let e = format!("Error in transaction funding: {:?}", e);
4718 let mut channels_to_remove = Vec::new();
4719 channels_to_remove.extend(funding_batch_states.as_mut()
4720 .and_then(|states| states.remove(&txid))
4721 .into_iter().flatten()
4722 .map(|(chan_id, node_id, _state)| (chan_id, node_id))
4724 channels_to_remove.extend(temporary_channels.iter()
4725 .map(|(&chan_id, &node_id)| (chan_id, node_id))
4727 let mut shutdown_results = Vec::new();
4729 let per_peer_state = self.per_peer_state.read().unwrap();
4730 for (channel_id, counterparty_node_id) in channels_to_remove {
4731 per_peer_state.get(&counterparty_node_id)
4732 .map(|peer_state_mutex| peer_state_mutex.lock().unwrap())
4733 .and_then(|mut peer_state| peer_state.channel_by_id.remove(&channel_id).map(|chan| (chan, peer_state)))
4734 .map(|(mut chan, mut peer_state)| {
4735 update_maps_on_chan_removal!(self, &chan.context());
4736 let closure_reason = ClosureReason::ProcessingError { err: e.clone() };
4737 shutdown_results.push(chan.context_mut().force_shutdown(false, closure_reason));
4738 peer_state.pending_msg_events.push(events::MessageSendEvent::HandleError {
4739 node_id: counterparty_node_id,
4740 action: msgs::ErrorAction::SendErrorMessage {
4741 msg: msgs::ErrorMessage {
4743 data: "Failed to fund channel".to_owned(),
4750 mem::drop(funding_batch_states);
4751 for shutdown_result in shutdown_results.drain(..) {
4752 self.finish_close_channel(shutdown_result);
4758 /// Atomically applies partial updates to the [`ChannelConfig`] of the given channels.
4760 /// Once the updates are applied, each eligible channel (advertised with a known short channel
4761 /// ID and a change in [`forwarding_fee_proportional_millionths`], [`forwarding_fee_base_msat`],
4762 /// or [`cltv_expiry_delta`]) has a [`BroadcastChannelUpdate`] event message generated
4763 /// containing the new [`ChannelUpdate`] message which should be broadcast to the network.
4765 /// Returns [`ChannelUnavailable`] when a channel is not found or an incorrect
4766 /// `counterparty_node_id` is provided.
4768 /// Returns [`APIMisuseError`] when a [`cltv_expiry_delta`] update is to be applied with a value
4769 /// below [`MIN_CLTV_EXPIRY_DELTA`].
4771 /// If an error is returned, none of the updates should be considered applied.
4773 /// [`forwarding_fee_proportional_millionths`]: ChannelConfig::forwarding_fee_proportional_millionths
4774 /// [`forwarding_fee_base_msat`]: ChannelConfig::forwarding_fee_base_msat
4775 /// [`cltv_expiry_delta`]: ChannelConfig::cltv_expiry_delta
4776 /// [`BroadcastChannelUpdate`]: events::MessageSendEvent::BroadcastChannelUpdate
4777 /// [`ChannelUpdate`]: msgs::ChannelUpdate
4778 /// [`ChannelUnavailable`]: APIError::ChannelUnavailable
4779 /// [`APIMisuseError`]: APIError::APIMisuseError
4780 pub fn update_partial_channel_config(
4781 &self, counterparty_node_id: &PublicKey, channel_ids: &[ChannelId], config_update: &ChannelConfigUpdate,
4782 ) -> Result<(), APIError> {
4783 if config_update.cltv_expiry_delta.map(|delta| delta < MIN_CLTV_EXPIRY_DELTA).unwrap_or(false) {
4784 return Err(APIError::APIMisuseError {
4785 err: format!("The chosen CLTV expiry delta is below the minimum of {}", MIN_CLTV_EXPIRY_DELTA),
4789 let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
4790 let per_peer_state = self.per_peer_state.read().unwrap();
4791 let peer_state_mutex = per_peer_state.get(counterparty_node_id)
4792 .ok_or_else(|| APIError::ChannelUnavailable { err: format!("Can't find a peer matching the passed counterparty node_id {}", counterparty_node_id) })?;
4793 let mut peer_state_lock = peer_state_mutex.lock().unwrap();
4794 let peer_state = &mut *peer_state_lock;
4796 for channel_id in channel_ids {
4797 if !peer_state.has_channel(channel_id) {
4798 return Err(APIError::ChannelUnavailable {
4799 err: format!("Channel with id {} not found for the passed counterparty node_id {}", channel_id, counterparty_node_id),
4803 for channel_id in channel_ids {
4804 if let Some(channel_phase) = peer_state.channel_by_id.get_mut(channel_id) {
4805 let mut config = channel_phase.context().config();
4806 config.apply(config_update);
4807 if !channel_phase.context_mut().update_config(&config) {
4810 if let ChannelPhase::Funded(channel) = channel_phase {
4811 if let Ok(msg) = self.get_channel_update_for_broadcast(channel) {
4812 let mut pending_broadcast_messages = self.pending_broadcast_messages.lock().unwrap();
4813 pending_broadcast_messages.push(events::MessageSendEvent::BroadcastChannelUpdate { msg });
4814 } else if let Ok(msg) = self.get_channel_update_for_unicast(channel) {
4815 peer_state.pending_msg_events.push(events::MessageSendEvent::SendChannelUpdate {
4816 node_id: channel.context.get_counterparty_node_id(),
4823 // This should not be reachable as we've already checked for non-existence in the previous channel_id loop.
4824 debug_assert!(false);
4825 return Err(APIError::ChannelUnavailable {
4827 "Channel with ID {} for passed counterparty_node_id {} disappeared after we confirmed its existence - this should not be reachable!",
4828 channel_id, counterparty_node_id),
4835 /// Atomically updates the [`ChannelConfig`] for the given channels.
4837 /// Once the updates are applied, each eligible channel (advertised with a known short channel
4838 /// ID and a change in [`forwarding_fee_proportional_millionths`], [`forwarding_fee_base_msat`],
4839 /// or [`cltv_expiry_delta`]) has a [`BroadcastChannelUpdate`] event message generated
4840 /// containing the new [`ChannelUpdate`] message which should be broadcast to the network.
4842 /// Returns [`ChannelUnavailable`] when a channel is not found or an incorrect
4843 /// `counterparty_node_id` is provided.
4845 /// Returns [`APIMisuseError`] when a [`cltv_expiry_delta`] update is to be applied with a value
4846 /// below [`MIN_CLTV_EXPIRY_DELTA`].
4848 /// If an error is returned, none of the updates should be considered applied.
4850 /// [`forwarding_fee_proportional_millionths`]: ChannelConfig::forwarding_fee_proportional_millionths
4851 /// [`forwarding_fee_base_msat`]: ChannelConfig::forwarding_fee_base_msat
4852 /// [`cltv_expiry_delta`]: ChannelConfig::cltv_expiry_delta
4853 /// [`BroadcastChannelUpdate`]: events::MessageSendEvent::BroadcastChannelUpdate
4854 /// [`ChannelUpdate`]: msgs::ChannelUpdate
4855 /// [`ChannelUnavailable`]: APIError::ChannelUnavailable
4856 /// [`APIMisuseError`]: APIError::APIMisuseError
4857 pub fn update_channel_config(
4858 &self, counterparty_node_id: &PublicKey, channel_ids: &[ChannelId], config: &ChannelConfig,
4859 ) -> Result<(), APIError> {
4860 return self.update_partial_channel_config(counterparty_node_id, channel_ids, &(*config).into());
4863 /// Attempts to forward an intercepted HTLC over the provided channel id and with the provided
4864 /// amount to forward. Should only be called in response to an [`HTLCIntercepted`] event.
4866 /// Intercepted HTLCs can be useful for Lightning Service Providers (LSPs) to open a just-in-time
4867 /// channel to a receiving node if the node lacks sufficient inbound liquidity.
4869 /// To make use of intercepted HTLCs, set [`UserConfig::accept_intercept_htlcs`] and use
4870 /// [`ChannelManager::get_intercept_scid`] to generate short channel id(s) to put in the
4871 /// receiver's invoice route hints. These route hints will signal to LDK to generate an
4872 /// [`HTLCIntercepted`] event when it receives the forwarded HTLC, and this method or
4873 /// [`ChannelManager::fail_intercepted_htlc`] MUST be called in response to the event.
4875 /// Note that LDK does not enforce fee requirements in `amt_to_forward_msat`, and will not stop
4876 /// you from forwarding more than you received. See
4877 /// [`HTLCIntercepted::expected_outbound_amount_msat`] for more on forwarding a different amount
4880 /// Errors if the event was not handled in time, in which case the HTLC was automatically failed
4883 /// [`UserConfig::accept_intercept_htlcs`]: crate::util::config::UserConfig::accept_intercept_htlcs
4884 /// [`HTLCIntercepted`]: events::Event::HTLCIntercepted
4885 /// [`HTLCIntercepted::expected_outbound_amount_msat`]: events::Event::HTLCIntercepted::expected_outbound_amount_msat
4886 // TODO: when we move to deciding the best outbound channel at forward time, only take
4887 // `next_node_id` and not `next_hop_channel_id`
4888 pub fn forward_intercepted_htlc(&self, intercept_id: InterceptId, next_hop_channel_id: &ChannelId, next_node_id: PublicKey, amt_to_forward_msat: u64) -> Result<(), APIError> {
4889 let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
4891 let next_hop_scid = {
4892 let peer_state_lock = self.per_peer_state.read().unwrap();
4893 let peer_state_mutex = peer_state_lock.get(&next_node_id)
4894 .ok_or_else(|| APIError::ChannelUnavailable { err: format!("Can't find a peer matching the passed counterparty node_id {}", next_node_id) })?;
4895 let mut peer_state_lock = peer_state_mutex.lock().unwrap();
4896 let peer_state = &mut *peer_state_lock;
4897 match peer_state.channel_by_id.get(next_hop_channel_id) {
4898 Some(ChannelPhase::Funded(chan)) => {
4899 if !chan.context.is_usable() {
4900 return Err(APIError::ChannelUnavailable {
4901 err: format!("Channel with id {} not fully established", next_hop_channel_id)
4904 chan.context.get_short_channel_id().unwrap_or(chan.context.outbound_scid_alias())
4906 Some(_) => return Err(APIError::ChannelUnavailable {
4907 err: format!("Channel with id {} for the passed counterparty node_id {} is still opening.",
4908 next_hop_channel_id, next_node_id)
4911 let error = format!("Channel with id {} not found for the passed counterparty node_id {}",
4912 next_hop_channel_id, next_node_id);
4913 let logger = WithContext::from(&self.logger, Some(next_node_id), Some(*next_hop_channel_id), None);
4914 log_error!(logger, "{} when attempting to forward intercepted HTLC", error);
4915 return Err(APIError::ChannelUnavailable {
4922 let payment = self.pending_intercepted_htlcs.lock().unwrap().remove(&intercept_id)
4923 .ok_or_else(|| APIError::APIMisuseError {
4924 err: format!("Payment with intercept id {} not found", log_bytes!(intercept_id.0))
4927 let routing = match payment.forward_info.routing {
4928 PendingHTLCRouting::Forward { onion_packet, blinded, .. } => {
4929 PendingHTLCRouting::Forward {
4930 onion_packet, blinded, short_channel_id: next_hop_scid
4933 _ => unreachable!() // Only `PendingHTLCRouting::Forward`s are intercepted
4935 let skimmed_fee_msat =
4936 payment.forward_info.outgoing_amt_msat.saturating_sub(amt_to_forward_msat);
4937 let pending_htlc_info = PendingHTLCInfo {
4938 skimmed_fee_msat: if skimmed_fee_msat == 0 { None } else { Some(skimmed_fee_msat) },
4939 outgoing_amt_msat: amt_to_forward_msat, routing, ..payment.forward_info
4942 let mut per_source_pending_forward = [(
4943 payment.prev_short_channel_id,
4944 payment.prev_funding_outpoint,
4945 payment.prev_channel_id,
4946 payment.prev_user_channel_id,
4947 vec![(pending_htlc_info, payment.prev_htlc_id)]
4949 self.forward_htlcs(&mut per_source_pending_forward);
4953 /// Fails the intercepted HTLC indicated by intercept_id. Should only be called in response to
4954 /// an [`HTLCIntercepted`] event. See [`ChannelManager::forward_intercepted_htlc`].
4956 /// Errors if the event was not handled in time, in which case the HTLC was automatically failed
4959 /// [`HTLCIntercepted`]: events::Event::HTLCIntercepted
4960 pub fn fail_intercepted_htlc(&self, intercept_id: InterceptId) -> Result<(), APIError> {
4961 let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
4963 let payment = self.pending_intercepted_htlcs.lock().unwrap().remove(&intercept_id)
4964 .ok_or_else(|| APIError::APIMisuseError {
4965 err: format!("Payment with intercept id {} not found", log_bytes!(intercept_id.0))
4968 if let PendingHTLCRouting::Forward { short_channel_id, .. } = payment.forward_info.routing {
4969 let htlc_source = HTLCSource::PreviousHopData(HTLCPreviousHopData {
4970 short_channel_id: payment.prev_short_channel_id,
4971 user_channel_id: Some(payment.prev_user_channel_id),
4972 outpoint: payment.prev_funding_outpoint,
4973 channel_id: payment.prev_channel_id,
4974 htlc_id: payment.prev_htlc_id,
4975 incoming_packet_shared_secret: payment.forward_info.incoming_shared_secret,
4976 phantom_shared_secret: None,
4977 blinded_failure: payment.forward_info.routing.blinded_failure(),
4980 let failure_reason = HTLCFailReason::from_failure_code(0x4000 | 10);
4981 let destination = HTLCDestination::UnknownNextHop { requested_forward_scid: short_channel_id };
4982 self.fail_htlc_backwards_internal(&htlc_source, &payment.forward_info.payment_hash, &failure_reason, destination);
4983 } else { unreachable!() } // Only `PendingHTLCRouting::Forward`s are intercepted
4988 fn process_pending_update_add_htlcs(&self) {
4989 let mut decode_update_add_htlcs = new_hash_map();
4990 mem::swap(&mut decode_update_add_htlcs, &mut self.decode_update_add_htlcs.lock().unwrap());
4992 let get_failed_htlc_destination = |outgoing_scid_opt: Option<u64>, payment_hash: PaymentHash| {
4993 if let Some(outgoing_scid) = outgoing_scid_opt {
4994 match self.short_to_chan_info.read().unwrap().get(&outgoing_scid) {
4995 Some((outgoing_counterparty_node_id, outgoing_channel_id)) =>
4996 HTLCDestination::NextHopChannel {
4997 node_id: Some(*outgoing_counterparty_node_id),
4998 channel_id: *outgoing_channel_id,
5000 None => HTLCDestination::UnknownNextHop {
5001 requested_forward_scid: outgoing_scid,
5005 HTLCDestination::FailedPayment { payment_hash }
5009 'outer_loop: for (incoming_scid, update_add_htlcs) in decode_update_add_htlcs {
5010 let incoming_channel_details_opt = self.do_funded_channel_callback(incoming_scid, |chan: &mut Channel<SP>| {
5011 let counterparty_node_id = chan.context.get_counterparty_node_id();
5012 let channel_id = chan.context.channel_id();
5013 let funding_txo = chan.context.get_funding_txo().unwrap();
5014 let user_channel_id = chan.context.get_user_id();
5015 let accept_underpaying_htlcs = chan.context.config().accept_underpaying_htlcs;
5016 (counterparty_node_id, channel_id, funding_txo, user_channel_id, accept_underpaying_htlcs)
5019 incoming_counterparty_node_id, incoming_channel_id, incoming_funding_txo,
5020 incoming_user_channel_id, incoming_accept_underpaying_htlcs
5021 ) = if let Some(incoming_channel_details) = incoming_channel_details_opt {
5022 incoming_channel_details
5024 // The incoming channel no longer exists, HTLCs should be resolved onchain instead.
5028 let mut htlc_forwards = Vec::new();
5029 let mut htlc_fails = Vec::new();
5030 for update_add_htlc in &update_add_htlcs {
5031 let (next_hop, shared_secret, next_packet_details_opt) = match decode_incoming_update_add_htlc_onion(
5032 &update_add_htlc, &self.node_signer, &self.logger, &self.secp_ctx
5034 Ok(decoded_onion) => decoded_onion,
5036 htlc_fails.push((htlc_fail, HTLCDestination::InvalidOnion));
5041 let is_intro_node_blinded_forward = next_hop.is_intro_node_blinded_forward();
5042 let outgoing_scid_opt = next_packet_details_opt.as_ref().map(|d| d.outgoing_scid);
5044 // Process the HTLC on the incoming channel.
5045 match self.do_funded_channel_callback(incoming_scid, |chan: &mut Channel<SP>| {
5046 let logger = WithChannelContext::from(&self.logger, &chan.context, Some(update_add_htlc.payment_hash));
5047 chan.can_accept_incoming_htlc(
5048 update_add_htlc, &self.fee_estimator, &logger,
5052 Some(Err((err, code))) => {
5053 let outgoing_chan_update_opt = if let Some(outgoing_scid) = outgoing_scid_opt.as_ref() {
5054 self.do_funded_channel_callback(*outgoing_scid, |chan: &mut Channel<SP>| {
5055 self.get_channel_update_for_onion(*outgoing_scid, chan).ok()
5060 let htlc_fail = self.htlc_failure_from_update_add_err(
5061 &update_add_htlc, &incoming_counterparty_node_id, err, code,
5062 outgoing_chan_update_opt, is_intro_node_blinded_forward, &shared_secret,
5064 let htlc_destination = get_failed_htlc_destination(outgoing_scid_opt, update_add_htlc.payment_hash);
5065 htlc_fails.push((htlc_fail, htlc_destination));
5068 // The incoming channel no longer exists, HTLCs should be resolved onchain instead.
5069 None => continue 'outer_loop,
5072 // Now process the HTLC on the outgoing channel if it's a forward.
5073 if let Some(next_packet_details) = next_packet_details_opt.as_ref() {
5074 if let Err((err, code, chan_update_opt)) = self.can_forward_htlc(
5075 &update_add_htlc, next_packet_details
5077 let htlc_fail = self.htlc_failure_from_update_add_err(
5078 &update_add_htlc, &incoming_counterparty_node_id, err, code,
5079 chan_update_opt, is_intro_node_blinded_forward, &shared_secret,
5081 let htlc_destination = get_failed_htlc_destination(outgoing_scid_opt, update_add_htlc.payment_hash);
5082 htlc_fails.push((htlc_fail, htlc_destination));
5087 match self.construct_pending_htlc_status(
5088 &update_add_htlc, &incoming_counterparty_node_id, shared_secret, next_hop,
5089 incoming_accept_underpaying_htlcs, next_packet_details_opt.map(|d| d.next_packet_pubkey),
5091 PendingHTLCStatus::Forward(htlc_forward) => {
5092 htlc_forwards.push((htlc_forward, update_add_htlc.htlc_id));
5094 PendingHTLCStatus::Fail(htlc_fail) => {
5095 let htlc_destination = get_failed_htlc_destination(outgoing_scid_opt, update_add_htlc.payment_hash);
5096 htlc_fails.push((htlc_fail, htlc_destination));
5101 // Process all of the forwards and failures for the channel in which the HTLCs were
5102 // proposed to as a batch.
5103 let pending_forwards = (incoming_scid, incoming_funding_txo, incoming_channel_id,
5104 incoming_user_channel_id, htlc_forwards.drain(..).collect());
5105 self.forward_htlcs_without_forward_event(&mut [pending_forwards]);
5106 for (htlc_fail, htlc_destination) in htlc_fails.drain(..) {
5107 let failure = match htlc_fail {
5108 HTLCFailureMsg::Relay(fail_htlc) => HTLCForwardInfo::FailHTLC {
5109 htlc_id: fail_htlc.htlc_id,
5110 err_packet: fail_htlc.reason,
5112 HTLCFailureMsg::Malformed(fail_malformed_htlc) => HTLCForwardInfo::FailMalformedHTLC {
5113 htlc_id: fail_malformed_htlc.htlc_id,
5114 sha256_of_onion: fail_malformed_htlc.sha256_of_onion,
5115 failure_code: fail_malformed_htlc.failure_code,
5118 self.forward_htlcs.lock().unwrap().entry(incoming_scid).or_insert(vec![]).push(failure);
5119 self.pending_events.lock().unwrap().push_back((events::Event::HTLCHandlingFailed {
5120 prev_channel_id: incoming_channel_id,
5121 failed_next_destination: htlc_destination,
5127 /// Processes HTLCs which are pending waiting on random forward delay.
5129 /// Should only really ever be called in response to a PendingHTLCsForwardable event.
5130 /// Will likely generate further events.
5131 pub fn process_pending_htlc_forwards(&self) {
5132 let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
5134 self.process_pending_update_add_htlcs();
5136 let mut new_events = VecDeque::new();
5137 let mut failed_forwards = Vec::new();
5138 let mut phantom_receives: Vec<(u64, OutPoint, ChannelId, u128, Vec<(PendingHTLCInfo, u64)>)> = Vec::new();
5140 let mut forward_htlcs = new_hash_map();
5141 mem::swap(&mut forward_htlcs, &mut self.forward_htlcs.lock().unwrap());
5143 for (short_chan_id, mut pending_forwards) in forward_htlcs {
5144 if short_chan_id != 0 {
5145 let mut forwarding_counterparty = None;
5146 macro_rules! forwarding_channel_not_found {
5148 for forward_info in pending_forwards.drain(..) {
5149 match forward_info {
5150 HTLCForwardInfo::AddHTLC(PendingAddHTLCInfo {
5151 prev_short_channel_id, prev_htlc_id, prev_channel_id, prev_funding_outpoint,
5152 prev_user_channel_id, forward_info: PendingHTLCInfo {
5153 routing, incoming_shared_secret, payment_hash, outgoing_amt_msat,
5154 outgoing_cltv_value, ..
5157 macro_rules! failure_handler {
5158 ($msg: expr, $err_code: expr, $err_data: expr, $phantom_ss: expr, $next_hop_unknown: expr) => {
5159 let logger = WithContext::from(&self.logger, forwarding_counterparty, Some(prev_channel_id), Some(payment_hash));
5160 log_info!(logger, "Failed to accept/forward incoming HTLC: {}", $msg);
5162 let htlc_source = HTLCSource::PreviousHopData(HTLCPreviousHopData {
5163 short_channel_id: prev_short_channel_id,
5164 user_channel_id: Some(prev_user_channel_id),
5165 channel_id: prev_channel_id,
5166 outpoint: prev_funding_outpoint,
5167 htlc_id: prev_htlc_id,
5168 incoming_packet_shared_secret: incoming_shared_secret,
5169 phantom_shared_secret: $phantom_ss,
5170 blinded_failure: routing.blinded_failure(),
5173 let reason = if $next_hop_unknown {
5174 HTLCDestination::UnknownNextHop { requested_forward_scid: short_chan_id }
5176 HTLCDestination::FailedPayment{ payment_hash }
5179 failed_forwards.push((htlc_source, payment_hash,
5180 HTLCFailReason::reason($err_code, $err_data),
5186 macro_rules! fail_forward {
5187 ($msg: expr, $err_code: expr, $err_data: expr, $phantom_ss: expr) => {
5189 failure_handler!($msg, $err_code, $err_data, $phantom_ss, true);
5193 macro_rules! failed_payment {
5194 ($msg: expr, $err_code: expr, $err_data: expr, $phantom_ss: expr) => {
5196 failure_handler!($msg, $err_code, $err_data, $phantom_ss, false);
5200 if let PendingHTLCRouting::Forward { ref onion_packet, .. } = routing {
5201 let phantom_pubkey_res = self.node_signer.get_node_id(Recipient::PhantomNode);
5202 if phantom_pubkey_res.is_ok() && fake_scid::is_valid_phantom(&self.fake_scid_rand_bytes, short_chan_id, &self.chain_hash) {
5203 let phantom_shared_secret = self.node_signer.ecdh(Recipient::PhantomNode, &onion_packet.public_key.unwrap(), None).unwrap().secret_bytes();
5204 let next_hop = match onion_utils::decode_next_payment_hop(
5205 phantom_shared_secret, &onion_packet.hop_data, onion_packet.hmac,
5206 payment_hash, None, &self.node_signer
5209 Err(onion_utils::OnionDecodeErr::Malformed { err_msg, err_code }) => {
5210 let sha256_of_onion = Sha256::hash(&onion_packet.hop_data).to_byte_array();
5211 // In this scenario, the phantom would have sent us an
5212 // `update_fail_malformed_htlc`, meaning here we encrypt the error as
5213 // if it came from us (the second-to-last hop) but contains the sha256
5215 failed_payment!(err_msg, err_code, sha256_of_onion.to_vec(), None);
5217 Err(onion_utils::OnionDecodeErr::Relay { err_msg, err_code }) => {
5218 failed_payment!(err_msg, err_code, Vec::new(), Some(phantom_shared_secret));
5222 onion_utils::Hop::Receive(hop_data) => {
5223 let current_height: u32 = self.best_block.read().unwrap().height;
5224 match create_recv_pending_htlc_info(hop_data,
5225 incoming_shared_secret, payment_hash, outgoing_amt_msat,
5226 outgoing_cltv_value, Some(phantom_shared_secret), false, None,
5227 current_height, self.default_configuration.accept_mpp_keysend)
5229 Ok(info) => phantom_receives.push((prev_short_channel_id, prev_funding_outpoint, prev_channel_id, prev_user_channel_id, vec![(info, prev_htlc_id)])),
5230 Err(InboundHTLCErr { err_code, err_data, msg }) => failed_payment!(msg, err_code, err_data, Some(phantom_shared_secret))
5236 fail_forward!(format!("Unknown short channel id {} for forward HTLC", short_chan_id), 0x4000 | 10, Vec::new(), None);
5239 fail_forward!(format!("Unknown short channel id {} for forward HTLC", short_chan_id), 0x4000 | 10, Vec::new(), None);
5242 HTLCForwardInfo::FailHTLC { .. } | HTLCForwardInfo::FailMalformedHTLC { .. } => {
5243 // Channel went away before we could fail it. This implies
5244 // the channel is now on chain and our counterparty is
5245 // trying to broadcast the HTLC-Timeout, but that's their
5246 // problem, not ours.
5252 let chan_info_opt = self.short_to_chan_info.read().unwrap().get(&short_chan_id).cloned();
5253 let (counterparty_node_id, forward_chan_id) = match chan_info_opt {
5254 Some((cp_id, chan_id)) => (cp_id, chan_id),
5256 forwarding_channel_not_found!();
5260 forwarding_counterparty = Some(counterparty_node_id);
5261 let per_peer_state = self.per_peer_state.read().unwrap();
5262 let peer_state_mutex_opt = per_peer_state.get(&counterparty_node_id);
5263 if peer_state_mutex_opt.is_none() {
5264 forwarding_channel_not_found!();
5267 let mut peer_state_lock = peer_state_mutex_opt.unwrap().lock().unwrap();
5268 let peer_state = &mut *peer_state_lock;
5269 if let Some(ChannelPhase::Funded(ref mut chan)) = peer_state.channel_by_id.get_mut(&forward_chan_id) {
5270 let logger = WithChannelContext::from(&self.logger, &chan.context, None);
5271 for forward_info in pending_forwards.drain(..) {
5272 let queue_fail_htlc_res = match forward_info {
5273 HTLCForwardInfo::AddHTLC(PendingAddHTLCInfo {
5274 prev_short_channel_id, prev_htlc_id, prev_channel_id, prev_funding_outpoint,
5275 prev_user_channel_id, forward_info: PendingHTLCInfo {
5276 incoming_shared_secret, payment_hash, outgoing_amt_msat, outgoing_cltv_value,
5277 routing: PendingHTLCRouting::Forward {
5278 onion_packet, blinded, ..
5279 }, skimmed_fee_msat, ..
5282 let logger = WithChannelContext::from(&self.logger, &chan.context, Some(payment_hash));
5283 log_trace!(logger, "Adding HTLC from short id {} with payment_hash {} to channel with short id {} after delay", prev_short_channel_id, &payment_hash, short_chan_id);
5284 let htlc_source = HTLCSource::PreviousHopData(HTLCPreviousHopData {
5285 short_channel_id: prev_short_channel_id,
5286 user_channel_id: Some(prev_user_channel_id),
5287 channel_id: prev_channel_id,
5288 outpoint: prev_funding_outpoint,
5289 htlc_id: prev_htlc_id,
5290 incoming_packet_shared_secret: incoming_shared_secret,
5291 // Phantom payments are only PendingHTLCRouting::Receive.
5292 phantom_shared_secret: None,
5293 blinded_failure: blinded.map(|b| b.failure),
5295 let next_blinding_point = blinded.and_then(|b| {
5296 let encrypted_tlvs_ss = self.node_signer.ecdh(
5297 Recipient::Node, &b.inbound_blinding_point, None
5298 ).unwrap().secret_bytes();
5299 onion_utils::next_hop_pubkey(
5300 &self.secp_ctx, b.inbound_blinding_point, &encrypted_tlvs_ss
5303 if let Err(e) = chan.queue_add_htlc(outgoing_amt_msat,
5304 payment_hash, outgoing_cltv_value, htlc_source.clone(),
5305 onion_packet, skimmed_fee_msat, next_blinding_point, &self.fee_estimator,
5308 if let ChannelError::Ignore(msg) = e {
5309 log_trace!(logger, "Failed to forward HTLC with payment_hash {}: {}", &payment_hash, msg);
5311 panic!("Stated return value requirements in send_htlc() were not met");
5313 let (failure_code, data) = self.get_htlc_temp_fail_err_and_data(0x1000|7, short_chan_id, chan);
5314 failed_forwards.push((htlc_source, payment_hash,
5315 HTLCFailReason::reason(failure_code, data),
5316 HTLCDestination::NextHopChannel { node_id: Some(chan.context.get_counterparty_node_id()), channel_id: forward_chan_id }
5322 HTLCForwardInfo::AddHTLC { .. } => {
5323 panic!("short_channel_id != 0 should imply any pending_forward entries are of type Forward");
5325 HTLCForwardInfo::FailHTLC { htlc_id, err_packet } => {
5326 log_trace!(logger, "Failing HTLC back to channel with short id {} (backward HTLC ID {}) after delay", short_chan_id, htlc_id);
5327 Some((chan.queue_fail_htlc(htlc_id, err_packet, &&logger), htlc_id))
5329 HTLCForwardInfo::FailMalformedHTLC { htlc_id, failure_code, sha256_of_onion } => {
5330 log_trace!(logger, "Failing malformed HTLC back to channel with short id {} (backward HTLC ID {}) after delay", short_chan_id, htlc_id);
5331 let res = chan.queue_fail_malformed_htlc(
5332 htlc_id, failure_code, sha256_of_onion, &&logger
5334 Some((res, htlc_id))
5337 if let Some((queue_fail_htlc_res, htlc_id)) = queue_fail_htlc_res {
5338 if let Err(e) = queue_fail_htlc_res {
5339 if let ChannelError::Ignore(msg) = e {
5340 log_trace!(logger, "Failed to fail HTLC with ID {} backwards to short_id {}: {}", htlc_id, short_chan_id, msg);
5342 panic!("Stated return value requirements in queue_fail_{{malformed_}}htlc() were not met");
5344 // fail-backs are best-effort, we probably already have one
5345 // pending, and if not that's OK, if not, the channel is on
5346 // the chain and sending the HTLC-Timeout is their problem.
5352 forwarding_channel_not_found!();
5356 'next_forwardable_htlc: for forward_info in pending_forwards.drain(..) {
5357 match forward_info {
5358 HTLCForwardInfo::AddHTLC(PendingAddHTLCInfo {
5359 prev_short_channel_id, prev_htlc_id, prev_channel_id, prev_funding_outpoint,
5360 prev_user_channel_id, forward_info: PendingHTLCInfo {
5361 routing, incoming_shared_secret, payment_hash, incoming_amt_msat, outgoing_amt_msat,
5362 skimmed_fee_msat, ..
5365 let blinded_failure = routing.blinded_failure();
5366 let (cltv_expiry, onion_payload, payment_data, payment_context, phantom_shared_secret, mut onion_fields) = match routing {
5367 PendingHTLCRouting::Receive {
5368 payment_data, payment_metadata, payment_context,
5369 incoming_cltv_expiry, phantom_shared_secret, custom_tlvs,
5370 requires_blinded_error: _
5372 let _legacy_hop_data = Some(payment_data.clone());
5373 let onion_fields = RecipientOnionFields { payment_secret: Some(payment_data.payment_secret),
5374 payment_metadata, custom_tlvs };
5375 (incoming_cltv_expiry, OnionPayload::Invoice { _legacy_hop_data },
5376 Some(payment_data), payment_context, phantom_shared_secret, onion_fields)
5378 PendingHTLCRouting::ReceiveKeysend {
5379 payment_data, payment_preimage, payment_metadata,
5380 incoming_cltv_expiry, custom_tlvs, requires_blinded_error: _
5382 let onion_fields = RecipientOnionFields {
5383 payment_secret: payment_data.as_ref().map(|data| data.payment_secret),
5387 (incoming_cltv_expiry, OnionPayload::Spontaneous(payment_preimage),
5388 payment_data, None, None, onion_fields)
5391 panic!("short_channel_id == 0 should imply any pending_forward entries are of type Receive");
5394 let claimable_htlc = ClaimableHTLC {
5395 prev_hop: HTLCPreviousHopData {
5396 short_channel_id: prev_short_channel_id,
5397 user_channel_id: Some(prev_user_channel_id),
5398 channel_id: prev_channel_id,
5399 outpoint: prev_funding_outpoint,
5400 htlc_id: prev_htlc_id,
5401 incoming_packet_shared_secret: incoming_shared_secret,
5402 phantom_shared_secret,
5405 // We differentiate the received value from the sender intended value
5406 // if possible so that we don't prematurely mark MPP payments complete
5407 // if routing nodes overpay
5408 value: incoming_amt_msat.unwrap_or(outgoing_amt_msat),
5409 sender_intended_value: outgoing_amt_msat,
5411 total_value_received: None,
5412 total_msat: if let Some(data) = &payment_data { data.total_msat } else { outgoing_amt_msat },
5415 counterparty_skimmed_fee_msat: skimmed_fee_msat,
5418 let mut committed_to_claimable = false;
5420 macro_rules! fail_htlc {
5421 ($htlc: expr, $payment_hash: expr) => {
5422 debug_assert!(!committed_to_claimable);
5423 let mut htlc_msat_height_data = $htlc.value.to_be_bytes().to_vec();
5424 htlc_msat_height_data.extend_from_slice(
5425 &self.best_block.read().unwrap().height.to_be_bytes(),
5427 failed_forwards.push((HTLCSource::PreviousHopData(HTLCPreviousHopData {
5428 short_channel_id: $htlc.prev_hop.short_channel_id,
5429 user_channel_id: $htlc.prev_hop.user_channel_id,
5430 channel_id: prev_channel_id,
5431 outpoint: prev_funding_outpoint,
5432 htlc_id: $htlc.prev_hop.htlc_id,
5433 incoming_packet_shared_secret: $htlc.prev_hop.incoming_packet_shared_secret,
5434 phantom_shared_secret,
5437 HTLCFailReason::reason(0x4000 | 15, htlc_msat_height_data),
5438 HTLCDestination::FailedPayment { payment_hash: $payment_hash },
5440 continue 'next_forwardable_htlc;
5443 let phantom_shared_secret = claimable_htlc.prev_hop.phantom_shared_secret;
5444 let mut receiver_node_id = self.our_network_pubkey;
5445 if phantom_shared_secret.is_some() {
5446 receiver_node_id = self.node_signer.get_node_id(Recipient::PhantomNode)
5447 .expect("Failed to get node_id for phantom node recipient");
5450 macro_rules! check_total_value {
5451 ($purpose: expr) => {{
5452 let mut payment_claimable_generated = false;
5453 let is_keysend = $purpose.is_keysend();
5454 let mut claimable_payments = self.claimable_payments.lock().unwrap();
5455 if claimable_payments.pending_claiming_payments.contains_key(&payment_hash) {
5456 fail_htlc!(claimable_htlc, payment_hash);
5458 let ref mut claimable_payment = claimable_payments.claimable_payments
5459 .entry(payment_hash)
5460 // Note that if we insert here we MUST NOT fail_htlc!()
5461 .or_insert_with(|| {
5462 committed_to_claimable = true;
5464 purpose: $purpose.clone(), htlcs: Vec::new(), onion_fields: None,
5467 if $purpose != claimable_payment.purpose {
5468 let log_keysend = |keysend| if keysend { "keysend" } else { "non-keysend" };
5469 log_trace!(self.logger, "Failing new {} HTLC with payment_hash {} as we already had an existing {} HTLC with the same payment hash", log_keysend(is_keysend), &payment_hash, log_keysend(!is_keysend));
5470 fail_htlc!(claimable_htlc, payment_hash);
5472 if !self.default_configuration.accept_mpp_keysend && is_keysend && !claimable_payment.htlcs.is_empty() {
5473 log_trace!(self.logger, "Failing new keysend HTLC with payment_hash {} as we already had an existing keysend HTLC with the same payment hash and our config states we don't accept MPP keysend", &payment_hash);
5474 fail_htlc!(claimable_htlc, payment_hash);
5476 if let Some(earlier_fields) = &mut claimable_payment.onion_fields {
5477 if earlier_fields.check_merge(&mut onion_fields).is_err() {
5478 fail_htlc!(claimable_htlc, payment_hash);
5481 claimable_payment.onion_fields = Some(onion_fields);
5483 let ref mut htlcs = &mut claimable_payment.htlcs;
5484 let mut total_value = claimable_htlc.sender_intended_value;
5485 let mut earliest_expiry = claimable_htlc.cltv_expiry;
5486 for htlc in htlcs.iter() {
5487 total_value += htlc.sender_intended_value;
5488 earliest_expiry = cmp::min(earliest_expiry, htlc.cltv_expiry);
5489 if htlc.total_msat != claimable_htlc.total_msat {
5490 log_trace!(self.logger, "Failing HTLCs with payment_hash {} as the HTLCs had inconsistent total values (eg {} and {})",
5491 &payment_hash, claimable_htlc.total_msat, htlc.total_msat);
5492 total_value = msgs::MAX_VALUE_MSAT;
5494 if total_value >= msgs::MAX_VALUE_MSAT { break; }
5496 // The condition determining whether an MPP is complete must
5497 // match exactly the condition used in `timer_tick_occurred`
5498 if total_value >= msgs::MAX_VALUE_MSAT {
5499 fail_htlc!(claimable_htlc, payment_hash);
5500 } else if total_value - claimable_htlc.sender_intended_value >= claimable_htlc.total_msat {
5501 log_trace!(self.logger, "Failing HTLC with payment_hash {} as payment is already claimable",
5503 fail_htlc!(claimable_htlc, payment_hash);
5504 } else if total_value >= claimable_htlc.total_msat {
5505 #[allow(unused_assignments)] {
5506 committed_to_claimable = true;
5508 htlcs.push(claimable_htlc);
5509 let amount_msat = htlcs.iter().map(|htlc| htlc.value).sum();
5510 htlcs.iter_mut().for_each(|htlc| htlc.total_value_received = Some(amount_msat));
5511 let counterparty_skimmed_fee_msat = htlcs.iter()
5512 .map(|htlc| htlc.counterparty_skimmed_fee_msat.unwrap_or(0)).sum();
5513 debug_assert!(total_value.saturating_sub(amount_msat) <=
5514 counterparty_skimmed_fee_msat);
5515 new_events.push_back((events::Event::PaymentClaimable {
5516 receiver_node_id: Some(receiver_node_id),
5520 counterparty_skimmed_fee_msat,
5521 via_channel_id: Some(prev_channel_id),
5522 via_user_channel_id: Some(prev_user_channel_id),
5523 claim_deadline: Some(earliest_expiry - HTLC_FAIL_BACK_BUFFER),
5524 onion_fields: claimable_payment.onion_fields.clone(),
5526 payment_claimable_generated = true;
5528 // Nothing to do - we haven't reached the total
5529 // payment value yet, wait until we receive more
5531 htlcs.push(claimable_htlc);
5532 #[allow(unused_assignments)] {
5533 committed_to_claimable = true;
5536 payment_claimable_generated
5540 // Check that the payment hash and secret are known. Note that we
5541 // MUST take care to handle the "unknown payment hash" and
5542 // "incorrect payment secret" cases here identically or we'd expose
5543 // that we are the ultimate recipient of the given payment hash.
5544 // Further, we must not expose whether we have any other HTLCs
5545 // associated with the same payment_hash pending or not.
5546 let mut payment_secrets = self.pending_inbound_payments.lock().unwrap();
5547 match payment_secrets.entry(payment_hash) {
5548 hash_map::Entry::Vacant(_) => {
5549 match claimable_htlc.onion_payload {
5550 OnionPayload::Invoice { .. } => {
5551 let payment_data = payment_data.unwrap();
5552 let (payment_preimage, min_final_cltv_expiry_delta) = match inbound_payment::verify(payment_hash, &payment_data, self.highest_seen_timestamp.load(Ordering::Acquire) as u64, &self.inbound_payment_key, &self.logger) {
5553 Ok(result) => result,
5555 log_trace!(self.logger, "Failing new HTLC with payment_hash {} as payment verification failed", &payment_hash);
5556 fail_htlc!(claimable_htlc, payment_hash);
5559 if let Some(min_final_cltv_expiry_delta) = min_final_cltv_expiry_delta {
5560 let expected_min_expiry_height = (self.current_best_block().height + min_final_cltv_expiry_delta as u32) as u64;
5561 if (cltv_expiry as u64) < expected_min_expiry_height {
5562 log_trace!(self.logger, "Failing new HTLC with payment_hash {} as its CLTV expiry was too soon (had {}, earliest expected {})",
5563 &payment_hash, cltv_expiry, expected_min_expiry_height);
5564 fail_htlc!(claimable_htlc, payment_hash);
5567 let purpose = events::PaymentPurpose::from_parts(
5569 payment_data.payment_secret,
5572 check_total_value!(purpose);
5574 OnionPayload::Spontaneous(preimage) => {
5575 let purpose = events::PaymentPurpose::SpontaneousPayment(preimage);
5576 check_total_value!(purpose);
5580 hash_map::Entry::Occupied(inbound_payment) => {
5581 if let OnionPayload::Spontaneous(_) = claimable_htlc.onion_payload {
5582 log_trace!(self.logger, "Failing new keysend HTLC with payment_hash {} because we already have an inbound payment with the same payment hash", &payment_hash);
5583 fail_htlc!(claimable_htlc, payment_hash);
5585 let payment_data = payment_data.unwrap();
5586 if inbound_payment.get().payment_secret != payment_data.payment_secret {
5587 log_trace!(self.logger, "Failing new HTLC with payment_hash {} as it didn't match our expected payment secret.", &payment_hash);
5588 fail_htlc!(claimable_htlc, payment_hash);
5589 } else if inbound_payment.get().min_value_msat.is_some() && payment_data.total_msat < inbound_payment.get().min_value_msat.unwrap() {
5590 log_trace!(self.logger, "Failing new HTLC with payment_hash {} as it didn't match our minimum value (had {}, needed {}).",
5591 &payment_hash, payment_data.total_msat, inbound_payment.get().min_value_msat.unwrap());
5592 fail_htlc!(claimable_htlc, payment_hash);
5594 let purpose = events::PaymentPurpose::from_parts(
5595 inbound_payment.get().payment_preimage,
5596 payment_data.payment_secret,
5599 let payment_claimable_generated = check_total_value!(purpose);
5600 if payment_claimable_generated {
5601 inbound_payment.remove_entry();
5607 HTLCForwardInfo::FailHTLC { .. } | HTLCForwardInfo::FailMalformedHTLC { .. } => {
5608 panic!("Got pending fail of our own HTLC");
5616 let best_block_height = self.best_block.read().unwrap().height;
5617 self.pending_outbound_payments.check_retry_payments(&self.router, || self.list_usable_channels(),
5618 || self.compute_inflight_htlcs(), &self.entropy_source, &self.node_signer, best_block_height,
5619 &self.pending_events, &self.logger, |args| self.send_payment_along_path(args));
5621 for (htlc_source, payment_hash, failure_reason, destination) in failed_forwards.drain(..) {
5622 self.fail_htlc_backwards_internal(&htlc_source, &payment_hash, &failure_reason, destination);
5624 self.forward_htlcs(&mut phantom_receives);
5626 // Freeing the holding cell here is relatively redundant - in practice we'll do it when we
5627 // next get a `get_and_clear_pending_msg_events` call, but some tests rely on it, and it's
5628 // nice to do the work now if we can rather than while we're trying to get messages in the
5630 self.check_free_holding_cells();
5632 if new_events.is_empty() { return }
5633 let mut events = self.pending_events.lock().unwrap();
5634 events.append(&mut new_events);
5637 /// Free the background events, generally called from [`PersistenceNotifierGuard`] constructors.
5639 /// Expects the caller to have a total_consistency_lock read lock.
5640 fn process_background_events(&self) -> NotifyOption {
5641 debug_assert_ne!(self.total_consistency_lock.held_by_thread(), LockHeldState::NotHeldByThread);
5643 self.background_events_processed_since_startup.store(true, Ordering::Release);
5645 let mut background_events = Vec::new();
5646 mem::swap(&mut *self.pending_background_events.lock().unwrap(), &mut background_events);
5647 if background_events.is_empty() {
5648 return NotifyOption::SkipPersistNoEvents;
5651 for event in background_events.drain(..) {
5653 BackgroundEvent::ClosedMonitorUpdateRegeneratedOnStartup((funding_txo, _channel_id, update)) => {
5654 // The channel has already been closed, so no use bothering to care about the
5655 // monitor updating completing.
5656 let _ = self.chain_monitor.update_channel(funding_txo, &update);
5658 BackgroundEvent::MonitorUpdateRegeneratedOnStartup { counterparty_node_id, funding_txo, channel_id, update } => {
5659 let mut updated_chan = false;
5661 let per_peer_state = self.per_peer_state.read().unwrap();
5662 if let Some(peer_state_mutex) = per_peer_state.get(&counterparty_node_id) {
5663 let mut peer_state_lock = peer_state_mutex.lock().unwrap();
5664 let peer_state = &mut *peer_state_lock;
5665 match peer_state.channel_by_id.entry(channel_id) {
5666 hash_map::Entry::Occupied(mut chan_phase) => {
5667 if let ChannelPhase::Funded(chan) = chan_phase.get_mut() {
5668 updated_chan = true;
5669 handle_new_monitor_update!(self, funding_txo, update.clone(),
5670 peer_state_lock, peer_state, per_peer_state, chan);
5672 debug_assert!(false, "We shouldn't have an update for a non-funded channel");
5675 hash_map::Entry::Vacant(_) => {},
5680 // TODO: Track this as in-flight even though the channel is closed.
5681 let _ = self.chain_monitor.update_channel(funding_txo, &update);
5684 BackgroundEvent::MonitorUpdatesComplete { counterparty_node_id, channel_id } => {
5685 let per_peer_state = self.per_peer_state.read().unwrap();
5686 if let Some(peer_state_mutex) = per_peer_state.get(&counterparty_node_id) {
5687 let mut peer_state_lock = peer_state_mutex.lock().unwrap();
5688 let peer_state = &mut *peer_state_lock;
5689 if let Some(ChannelPhase::Funded(chan)) = peer_state.channel_by_id.get_mut(&channel_id) {
5690 handle_monitor_update_completion!(self, peer_state_lock, peer_state, per_peer_state, chan);
5692 let update_actions = peer_state.monitor_update_blocked_actions
5693 .remove(&channel_id).unwrap_or(Vec::new());
5694 mem::drop(peer_state_lock);
5695 mem::drop(per_peer_state);
5696 self.handle_monitor_update_completion_actions(update_actions);
5702 NotifyOption::DoPersist
5705 #[cfg(any(test, feature = "_test_utils"))]
5706 /// Process background events, for functional testing
5707 pub fn test_process_background_events(&self) {
5708 let _lck = self.total_consistency_lock.read().unwrap();
5709 let _ = self.process_background_events();
5712 fn update_channel_fee(&self, chan_id: &ChannelId, chan: &mut Channel<SP>, new_feerate: u32) -> NotifyOption {
5713 if !chan.context.is_outbound() { return NotifyOption::SkipPersistNoEvents; }
5715 let logger = WithChannelContext::from(&self.logger, &chan.context, None);
5717 // If the feerate has decreased by less than half, don't bother
5718 if new_feerate <= chan.context.get_feerate_sat_per_1000_weight() && new_feerate * 2 > chan.context.get_feerate_sat_per_1000_weight() {
5719 return NotifyOption::SkipPersistNoEvents;
5721 if !chan.context.is_live() {
5722 log_trace!(logger, "Channel {} does not qualify for a feerate change from {} to {} as it cannot currently be updated (probably the peer is disconnected).",
5723 chan_id, chan.context.get_feerate_sat_per_1000_weight(), new_feerate);
5724 return NotifyOption::SkipPersistNoEvents;
5726 log_trace!(logger, "Channel {} qualifies for a feerate change from {} to {}.",
5727 &chan_id, chan.context.get_feerate_sat_per_1000_weight(), new_feerate);
5729 chan.queue_update_fee(new_feerate, &self.fee_estimator, &&logger);
5730 NotifyOption::DoPersist
5734 /// In chanmon_consistency we want to sometimes do the channel fee updates done in
5735 /// timer_tick_occurred, but we can't generate the disabled channel updates as it considers
5736 /// these a fuzz failure (as they usually indicate a channel force-close, which is exactly what
5737 /// it wants to detect). Thus, we have a variant exposed here for its benefit.
5738 pub fn maybe_update_chan_fees(&self) {
5739 PersistenceNotifierGuard::optionally_notify(self, || {
5740 let mut should_persist = NotifyOption::SkipPersistNoEvents;
5742 let non_anchor_feerate = self.fee_estimator.bounded_sat_per_1000_weight(ConfirmationTarget::NonAnchorChannelFee);
5743 let anchor_feerate = self.fee_estimator.bounded_sat_per_1000_weight(ConfirmationTarget::AnchorChannelFee);
5745 let per_peer_state = self.per_peer_state.read().unwrap();
5746 for (_cp_id, peer_state_mutex) in per_peer_state.iter() {
5747 let mut peer_state_lock = peer_state_mutex.lock().unwrap();
5748 let peer_state = &mut *peer_state_lock;
5749 for (chan_id, chan) in peer_state.channel_by_id.iter_mut().filter_map(
5750 |(chan_id, phase)| if let ChannelPhase::Funded(chan) = phase { Some((chan_id, chan)) } else { None }
5752 let new_feerate = if chan.context.get_channel_type().supports_anchors_zero_fee_htlc_tx() {
5757 let chan_needs_persist = self.update_channel_fee(chan_id, chan, new_feerate);
5758 if chan_needs_persist == NotifyOption::DoPersist { should_persist = NotifyOption::DoPersist; }
5766 /// Performs actions which should happen on startup and roughly once per minute thereafter.
5768 /// This currently includes:
5769 /// * Increasing or decreasing the on-chain feerate estimates for our outbound channels,
5770 /// * Broadcasting [`ChannelUpdate`] messages if we've been disconnected from our peer for more
5771 /// than a minute, informing the network that they should no longer attempt to route over
5773 /// * Expiring a channel's previous [`ChannelConfig`] if necessary to only allow forwarding HTLCs
5774 /// with the current [`ChannelConfig`].
5775 /// * Removing peers which have disconnected but and no longer have any channels.
5776 /// * Force-closing and removing channels which have not completed establishment in a timely manner.
5777 /// * Forgetting about stale outbound payments, either those that have already been fulfilled
5778 /// or those awaiting an invoice that hasn't been delivered in the necessary amount of time.
5779 /// The latter is determined using the system clock in `std` and the highest seen block time
5780 /// minus two hours in `no-std`.
5782 /// Note that this may cause reentrancy through [`chain::Watch::update_channel`] calls or feerate
5783 /// estimate fetches.
5785 /// [`ChannelUpdate`]: msgs::ChannelUpdate
5786 /// [`ChannelConfig`]: crate::util::config::ChannelConfig
5787 pub fn timer_tick_occurred(&self) {
5788 PersistenceNotifierGuard::optionally_notify(self, || {
5789 let mut should_persist = NotifyOption::SkipPersistNoEvents;
5791 let non_anchor_feerate = self.fee_estimator.bounded_sat_per_1000_weight(ConfirmationTarget::NonAnchorChannelFee);
5792 let anchor_feerate = self.fee_estimator.bounded_sat_per_1000_weight(ConfirmationTarget::AnchorChannelFee);
5794 let mut handle_errors: Vec<(Result<(), _>, _)> = Vec::new();
5795 let mut timed_out_mpp_htlcs = Vec::new();
5796 let mut pending_peers_awaiting_removal = Vec::new();
5797 let mut shutdown_channels = Vec::new();
5799 let mut process_unfunded_channel_tick = |
5800 chan_id: &ChannelId,
5801 context: &mut ChannelContext<SP>,
5802 unfunded_context: &mut UnfundedChannelContext,
5803 pending_msg_events: &mut Vec<MessageSendEvent>,
5804 counterparty_node_id: PublicKey,
5806 context.maybe_expire_prev_config();
5807 if unfunded_context.should_expire_unfunded_channel() {
5808 let logger = WithChannelContext::from(&self.logger, context, None);
5810 "Force-closing pending channel with ID {} for not establishing in a timely manner", chan_id);
5811 update_maps_on_chan_removal!(self, &context);
5812 shutdown_channels.push(context.force_shutdown(false, ClosureReason::HolderForceClosed));
5813 pending_msg_events.push(MessageSendEvent::HandleError {
5814 node_id: counterparty_node_id,
5815 action: msgs::ErrorAction::SendErrorMessage {
5816 msg: msgs::ErrorMessage {
5817 channel_id: *chan_id,
5818 data: "Force-closing pending channel due to timeout awaiting establishment handshake".to_owned(),
5829 let per_peer_state = self.per_peer_state.read().unwrap();
5830 for (counterparty_node_id, peer_state_mutex) in per_peer_state.iter() {
5831 let mut peer_state_lock = peer_state_mutex.lock().unwrap();
5832 let peer_state = &mut *peer_state_lock;
5833 let pending_msg_events = &mut peer_state.pending_msg_events;
5834 let counterparty_node_id = *counterparty_node_id;
5835 peer_state.channel_by_id.retain(|chan_id, phase| {
5837 ChannelPhase::Funded(chan) => {
5838 let new_feerate = if chan.context.get_channel_type().supports_anchors_zero_fee_htlc_tx() {
5843 let chan_needs_persist = self.update_channel_fee(chan_id, chan, new_feerate);
5844 if chan_needs_persist == NotifyOption::DoPersist { should_persist = NotifyOption::DoPersist; }
5846 if let Err(e) = chan.timer_check_closing_negotiation_progress() {
5847 let (needs_close, err) = convert_chan_phase_err!(self, e, chan, chan_id, FUNDED_CHANNEL);
5848 handle_errors.push((Err(err), counterparty_node_id));
5849 if needs_close { return false; }
5852 match chan.channel_update_status() {
5853 ChannelUpdateStatus::Enabled if !chan.context.is_live() => chan.set_channel_update_status(ChannelUpdateStatus::DisabledStaged(0)),
5854 ChannelUpdateStatus::Disabled if chan.context.is_live() => chan.set_channel_update_status(ChannelUpdateStatus::EnabledStaged(0)),
5855 ChannelUpdateStatus::DisabledStaged(_) if chan.context.is_live()
5856 => chan.set_channel_update_status(ChannelUpdateStatus::Enabled),
5857 ChannelUpdateStatus::EnabledStaged(_) if !chan.context.is_live()
5858 => chan.set_channel_update_status(ChannelUpdateStatus::Disabled),
5859 ChannelUpdateStatus::DisabledStaged(mut n) if !chan.context.is_live() => {
5861 if n >= DISABLE_GOSSIP_TICKS {
5862 chan.set_channel_update_status(ChannelUpdateStatus::Disabled);
5863 if let Ok(update) = self.get_channel_update_for_broadcast(&chan) {
5864 let mut pending_broadcast_messages = self.pending_broadcast_messages.lock().unwrap();
5865 pending_broadcast_messages.push(events::MessageSendEvent::BroadcastChannelUpdate {
5869 should_persist = NotifyOption::DoPersist;
5871 chan.set_channel_update_status(ChannelUpdateStatus::DisabledStaged(n));
5874 ChannelUpdateStatus::EnabledStaged(mut n) if chan.context.is_live() => {
5876 if n >= ENABLE_GOSSIP_TICKS {
5877 chan.set_channel_update_status(ChannelUpdateStatus::Enabled);
5878 if let Ok(update) = self.get_channel_update_for_broadcast(&chan) {
5879 let mut pending_broadcast_messages = self.pending_broadcast_messages.lock().unwrap();
5880 pending_broadcast_messages.push(events::MessageSendEvent::BroadcastChannelUpdate {
5884 should_persist = NotifyOption::DoPersist;
5886 chan.set_channel_update_status(ChannelUpdateStatus::EnabledStaged(n));
5892 chan.context.maybe_expire_prev_config();
5894 if chan.should_disconnect_peer_awaiting_response() {
5895 let logger = WithChannelContext::from(&self.logger, &chan.context, None);
5896 log_debug!(logger, "Disconnecting peer {} due to not making any progress on channel {}",
5897 counterparty_node_id, chan_id);
5898 pending_msg_events.push(MessageSendEvent::HandleError {
5899 node_id: counterparty_node_id,
5900 action: msgs::ErrorAction::DisconnectPeerWithWarning {
5901 msg: msgs::WarningMessage {
5902 channel_id: *chan_id,
5903 data: "Disconnecting due to timeout awaiting response".to_owned(),
5911 ChannelPhase::UnfundedInboundV1(chan) => {
5912 process_unfunded_channel_tick(chan_id, &mut chan.context, &mut chan.unfunded_context,
5913 pending_msg_events, counterparty_node_id)
5915 ChannelPhase::UnfundedOutboundV1(chan) => {
5916 process_unfunded_channel_tick(chan_id, &mut chan.context, &mut chan.unfunded_context,
5917 pending_msg_events, counterparty_node_id)
5919 #[cfg(any(dual_funding, splicing))]
5920 ChannelPhase::UnfundedInboundV2(chan) => {
5921 process_unfunded_channel_tick(chan_id, &mut chan.context, &mut chan.unfunded_context,
5922 pending_msg_events, counterparty_node_id)
5924 #[cfg(any(dual_funding, splicing))]
5925 ChannelPhase::UnfundedOutboundV2(chan) => {
5926 process_unfunded_channel_tick(chan_id, &mut chan.context, &mut chan.unfunded_context,
5927 pending_msg_events, counterparty_node_id)
5932 for (chan_id, req) in peer_state.inbound_channel_request_by_id.iter_mut() {
5933 if { req.ticks_remaining -= 1 ; req.ticks_remaining } <= 0 {
5934 let logger = WithContext::from(&self.logger, Some(counterparty_node_id), Some(*chan_id), None);
5935 log_error!(logger, "Force-closing unaccepted inbound channel {} for not accepting in a timely manner", &chan_id);
5936 peer_state.pending_msg_events.push(
5937 events::MessageSendEvent::HandleError {
5938 node_id: counterparty_node_id,
5939 action: msgs::ErrorAction::SendErrorMessage {
5940 msg: msgs::ErrorMessage { channel_id: chan_id.clone(), data: "Channel force-closed".to_owned() }
5946 peer_state.inbound_channel_request_by_id.retain(|_, req| req.ticks_remaining > 0);
5948 if peer_state.ok_to_remove(true) {
5949 pending_peers_awaiting_removal.push(counterparty_node_id);
5954 // When a peer disconnects but still has channels, the peer's `peer_state` entry in the
5955 // `per_peer_state` is not removed by the `peer_disconnected` function. If the channels
5956 // of to that peer is later closed while still being disconnected (i.e. force closed),
5957 // we therefore need to remove the peer from `peer_state` separately.
5958 // To avoid having to take the `per_peer_state` `write` lock once the channels are
5959 // closed, we instead remove such peers awaiting removal here on a timer, to limit the
5960 // negative effects on parallelism as much as possible.
5961 if pending_peers_awaiting_removal.len() > 0 {
5962 let mut per_peer_state = self.per_peer_state.write().unwrap();
5963 for counterparty_node_id in pending_peers_awaiting_removal {
5964 match per_peer_state.entry(counterparty_node_id) {
5965 hash_map::Entry::Occupied(entry) => {
5966 // Remove the entry if the peer is still disconnected and we still
5967 // have no channels to the peer.
5968 let remove_entry = {
5969 let peer_state = entry.get().lock().unwrap();
5970 peer_state.ok_to_remove(true)
5973 entry.remove_entry();
5976 hash_map::Entry::Vacant(_) => { /* The PeerState has already been removed */ }
5981 self.claimable_payments.lock().unwrap().claimable_payments.retain(|payment_hash, payment| {
5982 if payment.htlcs.is_empty() {
5983 // This should be unreachable
5984 debug_assert!(false);
5987 if let OnionPayload::Invoice { .. } = payment.htlcs[0].onion_payload {
5988 // Check if we've received all the parts we need for an MPP (the value of the parts adds to total_msat).
5989 // In this case we're not going to handle any timeouts of the parts here.
5990 // This condition determining whether the MPP is complete here must match
5991 // exactly the condition used in `process_pending_htlc_forwards`.
5992 if payment.htlcs[0].total_msat <= payment.htlcs.iter()
5993 .fold(0, |total, htlc| total + htlc.sender_intended_value)
5996 } else if payment.htlcs.iter_mut().any(|htlc| {
5997 htlc.timer_ticks += 1;
5998 return htlc.timer_ticks >= MPP_TIMEOUT_TICKS
6000 timed_out_mpp_htlcs.extend(payment.htlcs.drain(..)
6001 .map(|htlc: ClaimableHTLC| (htlc.prev_hop, *payment_hash)));
6008 for htlc_source in timed_out_mpp_htlcs.drain(..) {
6009 let source = HTLCSource::PreviousHopData(htlc_source.0.clone());
6010 let reason = HTLCFailReason::from_failure_code(23);
6011 let receiver = HTLCDestination::FailedPayment { payment_hash: htlc_source.1 };
6012 self.fail_htlc_backwards_internal(&source, &htlc_source.1, &reason, receiver);
6015 for (err, counterparty_node_id) in handle_errors.drain(..) {
6016 let _ = handle_error!(self, err, counterparty_node_id);
6019 for shutdown_res in shutdown_channels {
6020 self.finish_close_channel(shutdown_res);
6023 #[cfg(feature = "std")]
6024 let duration_since_epoch = std::time::SystemTime::now()
6025 .duration_since(std::time::SystemTime::UNIX_EPOCH)
6026 .expect("SystemTime::now() should come after SystemTime::UNIX_EPOCH");
6027 #[cfg(not(feature = "std"))]
6028 let duration_since_epoch = Duration::from_secs(
6029 self.highest_seen_timestamp.load(Ordering::Acquire).saturating_sub(7200) as u64
6032 self.pending_outbound_payments.remove_stale_payments(
6033 duration_since_epoch, &self.pending_events
6036 // Technically we don't need to do this here, but if we have holding cell entries in a
6037 // channel that need freeing, it's better to do that here and block a background task
6038 // than block the message queueing pipeline.
6039 if self.check_free_holding_cells() {
6040 should_persist = NotifyOption::DoPersist;
6047 /// Indicates that the preimage for payment_hash is unknown or the received amount is incorrect
6048 /// after a PaymentClaimable event, failing the HTLC back to its origin and freeing resources
6049 /// along the path (including in our own channel on which we received it).
6051 /// Note that in some cases around unclean shutdown, it is possible the payment may have
6052 /// already been claimed by you via [`ChannelManager::claim_funds`] prior to you seeing (a
6053 /// second copy of) the [`events::Event::PaymentClaimable`] event. Alternatively, the payment
6054 /// may have already been failed automatically by LDK if it was nearing its expiration time.
6056 /// While LDK will never claim a payment automatically on your behalf (i.e. without you calling
6057 /// [`ChannelManager::claim_funds`]), you should still monitor for
6058 /// [`events::Event::PaymentClaimed`] events even for payments you intend to fail, especially on
6059 /// startup during which time claims that were in-progress at shutdown may be replayed.
6060 pub fn fail_htlc_backwards(&self, payment_hash: &PaymentHash) {
6061 self.fail_htlc_backwards_with_reason(payment_hash, FailureCode::IncorrectOrUnknownPaymentDetails);
6064 /// This is a variant of [`ChannelManager::fail_htlc_backwards`] that allows you to specify the
6065 /// reason for the failure.
6067 /// See [`FailureCode`] for valid failure codes.
6068 pub fn fail_htlc_backwards_with_reason(&self, payment_hash: &PaymentHash, failure_code: FailureCode) {
6069 let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
6071 let removed_source = self.claimable_payments.lock().unwrap().claimable_payments.remove(payment_hash);
6072 if let Some(payment) = removed_source {
6073 for htlc in payment.htlcs {
6074 let reason = self.get_htlc_fail_reason_from_failure_code(failure_code, &htlc);
6075 let source = HTLCSource::PreviousHopData(htlc.prev_hop);
6076 let receiver = HTLCDestination::FailedPayment { payment_hash: *payment_hash };
6077 self.fail_htlc_backwards_internal(&source, &payment_hash, &reason, receiver);
6082 /// Gets error data to form an [`HTLCFailReason`] given a [`FailureCode`] and [`ClaimableHTLC`].
6083 fn get_htlc_fail_reason_from_failure_code(&self, failure_code: FailureCode, htlc: &ClaimableHTLC) -> HTLCFailReason {
6084 match failure_code {
6085 FailureCode::TemporaryNodeFailure => HTLCFailReason::from_failure_code(failure_code.into()),
6086 FailureCode::RequiredNodeFeatureMissing => HTLCFailReason::from_failure_code(failure_code.into()),
6087 FailureCode::IncorrectOrUnknownPaymentDetails => {
6088 let mut htlc_msat_height_data = htlc.value.to_be_bytes().to_vec();
6089 htlc_msat_height_data.extend_from_slice(&self.best_block.read().unwrap().height.to_be_bytes());
6090 HTLCFailReason::reason(failure_code.into(), htlc_msat_height_data)
6092 FailureCode::InvalidOnionPayload(data) => {
6093 let fail_data = match data {
6094 Some((typ, offset)) => [BigSize(typ).encode(), offset.encode()].concat(),
6097 HTLCFailReason::reason(failure_code.into(), fail_data)
6102 /// Gets an HTLC onion failure code and error data for an `UPDATE` error, given the error code
6103 /// that we want to return and a channel.
6105 /// This is for failures on the channel on which the HTLC was *received*, not failures
6107 fn get_htlc_inbound_temp_fail_err_and_data(&self, desired_err_code: u16, chan: &Channel<SP>) -> (u16, Vec<u8>) {
6108 // We can't be sure what SCID was used when relaying inbound towards us, so we have to
6109 // guess somewhat. If its a public channel, we figure best to just use the real SCID (as
6110 // we're not leaking that we have a channel with the counterparty), otherwise we try to use
6111 // an inbound SCID alias before the real SCID.
6112 let scid_pref = if chan.context.should_announce() {
6113 chan.context.get_short_channel_id().or(chan.context.latest_inbound_scid_alias())
6115 chan.context.latest_inbound_scid_alias().or(chan.context.get_short_channel_id())
6117 if let Some(scid) = scid_pref {
6118 self.get_htlc_temp_fail_err_and_data(desired_err_code, scid, chan)
6120 (0x4000|10, Vec::new())
6125 /// Gets an HTLC onion failure code and error data for an `UPDATE` error, given the error code
6126 /// that we want to return and a channel.
6127 fn get_htlc_temp_fail_err_and_data(&self, desired_err_code: u16, scid: u64, chan: &Channel<SP>) -> (u16, Vec<u8>) {
6128 debug_assert_eq!(desired_err_code & 0x1000, 0x1000);
6129 if let Ok(upd) = self.get_channel_update_for_onion(scid, chan) {
6130 let mut enc = VecWriter(Vec::with_capacity(upd.serialized_length() + 6));
6131 if desired_err_code == 0x1000 | 20 {
6132 // No flags for `disabled_flags` are currently defined so they're always two zero bytes.
6133 // See https://github.com/lightning/bolts/blob/341ec84/04-onion-routing.md?plain=1#L1008
6134 0u16.write(&mut enc).expect("Writes cannot fail");
6136 (upd.serialized_length() as u16 + 2).write(&mut enc).expect("Writes cannot fail");
6137 msgs::ChannelUpdate::TYPE.write(&mut enc).expect("Writes cannot fail");
6138 upd.write(&mut enc).expect("Writes cannot fail");
6139 (desired_err_code, enc.0)
6141 // If we fail to get a unicast channel_update, it implies we don't yet have an SCID,
6142 // which means we really shouldn't have gotten a payment to be forwarded over this
6143 // channel yet, or if we did it's from a route hint. Either way, returning an error of
6144 // PERM|no_such_channel should be fine.
6145 (0x4000|10, Vec::new())
6149 // Fail a list of HTLCs that were just freed from the holding cell. The HTLCs need to be
6150 // failed backwards or, if they were one of our outgoing HTLCs, then their failure needs to
6151 // be surfaced to the user.
6152 fn fail_holding_cell_htlcs(
6153 &self, mut htlcs_to_fail: Vec<(HTLCSource, PaymentHash)>, channel_id: ChannelId,
6154 counterparty_node_id: &PublicKey
6156 let (failure_code, onion_failure_data) = {
6157 let per_peer_state = self.per_peer_state.read().unwrap();
6158 if let Some(peer_state_mutex) = per_peer_state.get(counterparty_node_id) {
6159 let mut peer_state_lock = peer_state_mutex.lock().unwrap();
6160 let peer_state = &mut *peer_state_lock;
6161 match peer_state.channel_by_id.entry(channel_id) {
6162 hash_map::Entry::Occupied(chan_phase_entry) => {
6163 if let ChannelPhase::Funded(chan) = chan_phase_entry.get() {
6164 self.get_htlc_inbound_temp_fail_err_and_data(0x1000|7, &chan)
6166 // We shouldn't be trying to fail holding cell HTLCs on an unfunded channel.
6167 debug_assert!(false);
6168 (0x4000|10, Vec::new())
6171 hash_map::Entry::Vacant(_) => (0x4000|10, Vec::new())
6173 } else { (0x4000|10, Vec::new()) }
6176 for (htlc_src, payment_hash) in htlcs_to_fail.drain(..) {
6177 let reason = HTLCFailReason::reason(failure_code, onion_failure_data.clone());
6178 let receiver = HTLCDestination::NextHopChannel { node_id: Some(counterparty_node_id.clone()), channel_id };
6179 self.fail_htlc_backwards_internal(&htlc_src, &payment_hash, &reason, receiver);
6183 fn fail_htlc_backwards_internal(&self, source: &HTLCSource, payment_hash: &PaymentHash, onion_error: &HTLCFailReason, destination: HTLCDestination) {
6184 let push_forward_event = self.fail_htlc_backwards_internal_without_forward_event(source, payment_hash, onion_error, destination);
6185 if push_forward_event { self.push_pending_forwards_ev(); }
6188 /// Fails an HTLC backwards to the sender of it to us.
6189 /// Note that we do not assume that channels corresponding to failed HTLCs are still available.
6190 fn fail_htlc_backwards_internal_without_forward_event(&self, source: &HTLCSource, payment_hash: &PaymentHash, onion_error: &HTLCFailReason, destination: HTLCDestination) -> bool {
6191 // Ensure that no peer state channel storage lock is held when calling this function.
6192 // This ensures that future code doesn't introduce a lock-order requirement for
6193 // `forward_htlcs` to be locked after the `per_peer_state` peer locks, which calling
6194 // this function with any `per_peer_state` peer lock acquired would.
6195 #[cfg(debug_assertions)]
6196 for (_, peer) in self.per_peer_state.read().unwrap().iter() {
6197 debug_assert_ne!(peer.held_by_thread(), LockHeldState::HeldByThread);
6200 //TODO: There is a timing attack here where if a node fails an HTLC back to us they can
6201 //identify whether we sent it or not based on the (I presume) very different runtime
6202 //between the branches here. We should make this async and move it into the forward HTLCs
6205 // Note that we MUST NOT end up calling methods on self.chain_monitor here - we're called
6206 // from block_connected which may run during initialization prior to the chain_monitor
6207 // being fully configured. See the docs for `ChannelManagerReadArgs` for more.
6208 let mut push_forward_event;
6210 HTLCSource::OutboundRoute { ref path, ref session_priv, ref payment_id, .. } => {
6211 push_forward_event = self.pending_outbound_payments.fail_htlc(source, payment_hash, onion_error, path,
6212 session_priv, payment_id, self.probing_cookie_secret, &self.secp_ctx,
6213 &self.pending_events, &self.logger);
6215 HTLCSource::PreviousHopData(HTLCPreviousHopData {
6216 ref short_channel_id, ref htlc_id, ref incoming_packet_shared_secret,
6217 ref phantom_shared_secret, outpoint: _, ref blinded_failure, ref channel_id, ..
6220 WithContext::from(&self.logger, None, Some(*channel_id), Some(*payment_hash)),
6221 "Failing {}HTLC with payment_hash {} backwards from us: {:?}",
6222 if blinded_failure.is_some() { "blinded " } else { "" }, &payment_hash, onion_error
6224 let failure = match blinded_failure {
6225 Some(BlindedFailure::FromIntroductionNode) => {
6226 let blinded_onion_error = HTLCFailReason::reason(INVALID_ONION_BLINDING, vec![0; 32]);
6227 let err_packet = blinded_onion_error.get_encrypted_failure_packet(
6228 incoming_packet_shared_secret, phantom_shared_secret
6230 HTLCForwardInfo::FailHTLC { htlc_id: *htlc_id, err_packet }
6232 Some(BlindedFailure::FromBlindedNode) => {
6233 HTLCForwardInfo::FailMalformedHTLC {
6235 failure_code: INVALID_ONION_BLINDING,
6236 sha256_of_onion: [0; 32]
6240 let err_packet = onion_error.get_encrypted_failure_packet(
6241 incoming_packet_shared_secret, phantom_shared_secret
6243 HTLCForwardInfo::FailHTLC { htlc_id: *htlc_id, err_packet }
6247 push_forward_event = self.decode_update_add_htlcs.lock().unwrap().is_empty();
6248 let mut forward_htlcs = self.forward_htlcs.lock().unwrap();
6249 push_forward_event &= forward_htlcs.is_empty();
6250 match forward_htlcs.entry(*short_channel_id) {
6251 hash_map::Entry::Occupied(mut entry) => {
6252 entry.get_mut().push(failure);
6254 hash_map::Entry::Vacant(entry) => {
6255 entry.insert(vec!(failure));
6258 mem::drop(forward_htlcs);
6259 let mut pending_events = self.pending_events.lock().unwrap();
6260 pending_events.push_back((events::Event::HTLCHandlingFailed {
6261 prev_channel_id: *channel_id,
6262 failed_next_destination: destination,
6269 /// Provides a payment preimage in response to [`Event::PaymentClaimable`], generating any
6270 /// [`MessageSendEvent`]s needed to claim the payment.
6272 /// This method is guaranteed to ensure the payment has been claimed but only if the current
6273 /// height is strictly below [`Event::PaymentClaimable::claim_deadline`]. To avoid race
6274 /// conditions, you should wait for an [`Event::PaymentClaimed`] before considering the payment
6275 /// successful. It will generally be available in the next [`process_pending_events`] call.
6277 /// Note that if you did not set an `amount_msat` when calling [`create_inbound_payment`] or
6278 /// [`create_inbound_payment_for_hash`] you must check that the amount in the `PaymentClaimable`
6279 /// event matches your expectation. If you fail to do so and call this method, you may provide
6280 /// the sender "proof-of-payment" when they did not fulfill the full expected payment.
6282 /// This function will fail the payment if it has custom TLVs with even type numbers, as we
6283 /// will assume they are unknown. If you intend to accept even custom TLVs, you should use
6284 /// [`claim_funds_with_known_custom_tlvs`].
6286 /// [`Event::PaymentClaimable`]: crate::events::Event::PaymentClaimable
6287 /// [`Event::PaymentClaimable::claim_deadline`]: crate::events::Event::PaymentClaimable::claim_deadline
6288 /// [`Event::PaymentClaimed`]: crate::events::Event::PaymentClaimed
6289 /// [`process_pending_events`]: EventsProvider::process_pending_events
6290 /// [`create_inbound_payment`]: Self::create_inbound_payment
6291 /// [`create_inbound_payment_for_hash`]: Self::create_inbound_payment_for_hash
6292 /// [`claim_funds_with_known_custom_tlvs`]: Self::claim_funds_with_known_custom_tlvs
6293 pub fn claim_funds(&self, payment_preimage: PaymentPreimage) {
6294 self.claim_payment_internal(payment_preimage, false);
6297 /// This is a variant of [`claim_funds`] that allows accepting a payment with custom TLVs with
6298 /// even type numbers.
6302 /// You MUST check you've understood all even TLVs before using this to
6303 /// claim, otherwise you may unintentionally agree to some protocol you do not understand.
6305 /// [`claim_funds`]: Self::claim_funds
6306 pub fn claim_funds_with_known_custom_tlvs(&self, payment_preimage: PaymentPreimage) {
6307 self.claim_payment_internal(payment_preimage, true);
6310 fn claim_payment_internal(&self, payment_preimage: PaymentPreimage, custom_tlvs_known: bool) {
6311 let payment_hash = PaymentHash(Sha256::hash(&payment_preimage.0).to_byte_array());
6313 let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
6316 let mut claimable_payments = self.claimable_payments.lock().unwrap();
6317 if let Some(payment) = claimable_payments.claimable_payments.remove(&payment_hash) {
6318 let mut receiver_node_id = self.our_network_pubkey;
6319 for htlc in payment.htlcs.iter() {
6320 if htlc.prev_hop.phantom_shared_secret.is_some() {
6321 let phantom_pubkey = self.node_signer.get_node_id(Recipient::PhantomNode)
6322 .expect("Failed to get node_id for phantom node recipient");
6323 receiver_node_id = phantom_pubkey;
6328 let htlcs = payment.htlcs.iter().map(events::ClaimedHTLC::from).collect();
6329 let sender_intended_value = payment.htlcs.first().map(|htlc| htlc.total_msat);
6330 let dup_purpose = claimable_payments.pending_claiming_payments.insert(payment_hash,
6331 ClaimingPayment { amount_msat: payment.htlcs.iter().map(|source| source.value).sum(),
6332 payment_purpose: payment.purpose, receiver_node_id, htlcs, sender_intended_value
6334 if dup_purpose.is_some() {
6335 debug_assert!(false, "Shouldn't get a duplicate pending claim event ever");
6336 log_error!(self.logger, "Got a duplicate pending claimable event on payment hash {}! Please report this bug",
6340 if let Some(RecipientOnionFields { ref custom_tlvs, .. }) = payment.onion_fields {
6341 if !custom_tlvs_known && custom_tlvs.iter().any(|(typ, _)| typ % 2 == 0) {
6342 log_info!(self.logger, "Rejecting payment with payment hash {} as we cannot accept payment with unknown even TLVs: {}",
6343 &payment_hash, log_iter!(custom_tlvs.iter().map(|(typ, _)| typ).filter(|typ| *typ % 2 == 0)));
6344 claimable_payments.pending_claiming_payments.remove(&payment_hash);
6345 mem::drop(claimable_payments);
6346 for htlc in payment.htlcs {
6347 let reason = self.get_htlc_fail_reason_from_failure_code(FailureCode::InvalidOnionPayload(None), &htlc);
6348 let source = HTLCSource::PreviousHopData(htlc.prev_hop);
6349 let receiver = HTLCDestination::FailedPayment { payment_hash };
6350 self.fail_htlc_backwards_internal(&source, &payment_hash, &reason, receiver);
6359 debug_assert!(!sources.is_empty());
6361 // Just in case one HTLC has been failed between when we generated the `PaymentClaimable`
6362 // and when we got here we need to check that the amount we're about to claim matches the
6363 // amount we told the user in the last `PaymentClaimable`. We also do a sanity-check that
6364 // the MPP parts all have the same `total_msat`.
6365 let mut claimable_amt_msat = 0;
6366 let mut prev_total_msat = None;
6367 let mut expected_amt_msat = None;
6368 let mut valid_mpp = true;
6369 let mut errs = Vec::new();
6370 let per_peer_state = self.per_peer_state.read().unwrap();
6371 for htlc in sources.iter() {
6372 if prev_total_msat.is_some() && prev_total_msat != Some(htlc.total_msat) {
6373 log_error!(self.logger, "Somehow ended up with an MPP payment with different expected total amounts - this should not be reachable!");
6374 debug_assert!(false);
6378 prev_total_msat = Some(htlc.total_msat);
6380 if expected_amt_msat.is_some() && expected_amt_msat != htlc.total_value_received {
6381 log_error!(self.logger, "Somehow ended up with an MPP payment with different received total amounts - this should not be reachable!");
6382 debug_assert!(false);
6386 expected_amt_msat = htlc.total_value_received;
6387 claimable_amt_msat += htlc.value;
6389 mem::drop(per_peer_state);
6390 if sources.is_empty() || expected_amt_msat.is_none() {
6391 self.claimable_payments.lock().unwrap().pending_claiming_payments.remove(&payment_hash);
6392 log_info!(self.logger, "Attempted to claim an incomplete payment which no longer had any available HTLCs!");
6395 if claimable_amt_msat != expected_amt_msat.unwrap() {
6396 self.claimable_payments.lock().unwrap().pending_claiming_payments.remove(&payment_hash);
6397 log_info!(self.logger, "Attempted to claim an incomplete payment, expected {} msat, had {} available to claim.",
6398 expected_amt_msat.unwrap(), claimable_amt_msat);
6402 for htlc in sources.drain(..) {
6403 let prev_hop_chan_id = htlc.prev_hop.channel_id;
6404 if let Err((pk, err)) = self.claim_funds_from_hop(
6405 htlc.prev_hop, payment_preimage,
6406 |_, definitely_duplicate| {
6407 debug_assert!(!definitely_duplicate, "We shouldn't claim duplicatively from a payment");
6408 Some(MonitorUpdateCompletionAction::PaymentClaimed { payment_hash })
6411 if let msgs::ErrorAction::IgnoreError = err.err.action {
6412 // We got a temporary failure updating monitor, but will claim the
6413 // HTLC when the monitor updating is restored (or on chain).
6414 let logger = WithContext::from(&self.logger, None, Some(prev_hop_chan_id), Some(payment_hash));
6415 log_error!(logger, "Temporary failure claiming HTLC, treating as success: {}", err.err.err);
6416 } else { errs.push((pk, err)); }
6421 for htlc in sources.drain(..) {
6422 let mut htlc_msat_height_data = htlc.value.to_be_bytes().to_vec();
6423 htlc_msat_height_data.extend_from_slice(&self.best_block.read().unwrap().height.to_be_bytes());
6424 let source = HTLCSource::PreviousHopData(htlc.prev_hop);
6425 let reason = HTLCFailReason::reason(0x4000 | 15, htlc_msat_height_data);
6426 let receiver = HTLCDestination::FailedPayment { payment_hash };
6427 self.fail_htlc_backwards_internal(&source, &payment_hash, &reason, receiver);
6429 self.claimable_payments.lock().unwrap().pending_claiming_payments.remove(&payment_hash);
6432 // Now we can handle any errors which were generated.
6433 for (counterparty_node_id, err) in errs.drain(..) {
6434 let res: Result<(), _> = Err(err);
6435 let _ = handle_error!(self, res, counterparty_node_id);
6439 fn claim_funds_from_hop<ComplFunc: FnOnce(Option<u64>, bool) -> Option<MonitorUpdateCompletionAction>>(&self,
6440 prev_hop: HTLCPreviousHopData, payment_preimage: PaymentPreimage, completion_action: ComplFunc)
6441 -> Result<(), (PublicKey, MsgHandleErrInternal)> {
6442 //TODO: Delay the claimed_funds relaying just like we do outbound relay!
6444 // If we haven't yet run background events assume we're still deserializing and shouldn't
6445 // actually pass `ChannelMonitorUpdate`s to users yet. Instead, queue them up as
6446 // `BackgroundEvent`s.
6447 let during_init = !self.background_events_processed_since_startup.load(Ordering::Acquire);
6449 // As we may call handle_monitor_update_completion_actions in rather rare cases, check that
6450 // the required mutexes are not held before we start.
6451 debug_assert_ne!(self.pending_events.held_by_thread(), LockHeldState::HeldByThread);
6452 debug_assert_ne!(self.claimable_payments.held_by_thread(), LockHeldState::HeldByThread);
6455 let per_peer_state = self.per_peer_state.read().unwrap();
6456 let chan_id = prev_hop.channel_id;
6457 let counterparty_node_id_opt = match self.short_to_chan_info.read().unwrap().get(&prev_hop.short_channel_id) {
6458 Some((cp_id, _dup_chan_id)) => Some(cp_id.clone()),
6462 let peer_state_opt = counterparty_node_id_opt.as_ref().map(
6463 |counterparty_node_id| per_peer_state.get(counterparty_node_id)
6464 .map(|peer_mutex| peer_mutex.lock().unwrap())
6467 if peer_state_opt.is_some() {
6468 let mut peer_state_lock = peer_state_opt.unwrap();
6469 let peer_state = &mut *peer_state_lock;
6470 if let hash_map::Entry::Occupied(mut chan_phase_entry) = peer_state.channel_by_id.entry(chan_id) {
6471 if let ChannelPhase::Funded(chan) = chan_phase_entry.get_mut() {
6472 let counterparty_node_id = chan.context.get_counterparty_node_id();
6473 let logger = WithChannelContext::from(&self.logger, &chan.context, None);
6474 let fulfill_res = chan.get_update_fulfill_htlc_and_commit(prev_hop.htlc_id, payment_preimage, &&logger);
6477 UpdateFulfillCommitFetch::NewClaim { htlc_value_msat, monitor_update } => {
6478 if let Some(action) = completion_action(Some(htlc_value_msat), false) {
6479 log_trace!(logger, "Tracking monitor update completion action for channel {}: {:?}",
6481 peer_state.monitor_update_blocked_actions.entry(chan_id).or_insert(Vec::new()).push(action);
6484 handle_new_monitor_update!(self, prev_hop.outpoint, monitor_update, peer_state_lock,
6485 peer_state, per_peer_state, chan);
6487 // If we're running during init we cannot update a monitor directly -
6488 // they probably haven't actually been loaded yet. Instead, push the
6489 // monitor update as a background event.
6490 self.pending_background_events.lock().unwrap().push(
6491 BackgroundEvent::MonitorUpdateRegeneratedOnStartup {
6492 counterparty_node_id,
6493 funding_txo: prev_hop.outpoint,
6494 channel_id: prev_hop.channel_id,
6495 update: monitor_update.clone(),
6499 UpdateFulfillCommitFetch::DuplicateClaim {} => {
6500 let action = if let Some(action) = completion_action(None, true) {
6505 mem::drop(peer_state_lock);
6507 log_trace!(logger, "Completing monitor update completion action for channel {} as claim was redundant: {:?}",
6509 let (node_id, _funding_outpoint, channel_id, blocker) =
6510 if let MonitorUpdateCompletionAction::FreeOtherChannelImmediately {
6511 downstream_counterparty_node_id: node_id,
6512 downstream_funding_outpoint: funding_outpoint,
6513 blocking_action: blocker, downstream_channel_id: channel_id,
6515 (node_id, funding_outpoint, channel_id, blocker)
6517 debug_assert!(false,
6518 "Duplicate claims should always free another channel immediately");
6521 if let Some(peer_state_mtx) = per_peer_state.get(&node_id) {
6522 let mut peer_state = peer_state_mtx.lock().unwrap();
6523 if let Some(blockers) = peer_state
6524 .actions_blocking_raa_monitor_updates
6525 .get_mut(&channel_id)
6527 let mut found_blocker = false;
6528 blockers.retain(|iter| {
6529 // Note that we could actually be blocked, in
6530 // which case we need to only remove the one
6531 // blocker which was added duplicatively.
6532 let first_blocker = !found_blocker;
6533 if *iter == blocker { found_blocker = true; }
6534 *iter != blocker || !first_blocker
6536 debug_assert!(found_blocker);
6539 debug_assert!(false);
6548 let preimage_update = ChannelMonitorUpdate {
6549 update_id: CLOSED_CHANNEL_UPDATE_ID,
6550 counterparty_node_id: None,
6551 updates: vec![ChannelMonitorUpdateStep::PaymentPreimage {
6554 channel_id: Some(prev_hop.channel_id),
6558 // We update the ChannelMonitor on the backward link, after
6559 // receiving an `update_fulfill_htlc` from the forward link.
6560 let update_res = self.chain_monitor.update_channel(prev_hop.outpoint, &preimage_update);
6561 if update_res != ChannelMonitorUpdateStatus::Completed {
6562 // TODO: This needs to be handled somehow - if we receive a monitor update
6563 // with a preimage we *must* somehow manage to propagate it to the upstream
6564 // channel, or we must have an ability to receive the same event and try
6565 // again on restart.
6566 log_error!(WithContext::from(&self.logger, None, Some(prev_hop.channel_id), None),
6567 "Critical error: failed to update channel monitor with preimage {:?}: {:?}",
6568 payment_preimage, update_res);
6571 // If we're running during init we cannot update a monitor directly - they probably
6572 // haven't actually been loaded yet. Instead, push the monitor update as a background
6574 // Note that while it's safe to use `ClosedMonitorUpdateRegeneratedOnStartup` here (the
6575 // channel is already closed) we need to ultimately handle the monitor update
6576 // completion action only after we've completed the monitor update. This is the only
6577 // way to guarantee this update *will* be regenerated on startup (otherwise if this was
6578 // from a forwarded HTLC the downstream preimage may be deleted before we claim
6579 // upstream). Thus, we need to transition to some new `BackgroundEvent` type which will
6580 // complete the monitor update completion action from `completion_action`.
6581 self.pending_background_events.lock().unwrap().push(
6582 BackgroundEvent::ClosedMonitorUpdateRegeneratedOnStartup((
6583 prev_hop.outpoint, prev_hop.channel_id, preimage_update,
6586 // Note that we do process the completion action here. This totally could be a
6587 // duplicate claim, but we have no way of knowing without interrogating the
6588 // `ChannelMonitor` we've provided the above update to. Instead, note that `Event`s are
6589 // generally always allowed to be duplicative (and it's specifically noted in
6590 // `PaymentForwarded`).
6591 self.handle_monitor_update_completion_actions(completion_action(None, false));
6595 fn finalize_claims(&self, sources: Vec<HTLCSource>) {
6596 self.pending_outbound_payments.finalize_claims(sources, &self.pending_events);
6599 fn claim_funds_internal(&self, source: HTLCSource, payment_preimage: PaymentPreimage,
6600 forwarded_htlc_value_msat: Option<u64>, skimmed_fee_msat: Option<u64>, from_onchain: bool,
6601 startup_replay: bool, next_channel_counterparty_node_id: Option<PublicKey>,
6602 next_channel_outpoint: OutPoint, next_channel_id: ChannelId, next_user_channel_id: Option<u128>,
6605 HTLCSource::OutboundRoute { session_priv, payment_id, path, .. } => {
6606 debug_assert!(self.background_events_processed_since_startup.load(Ordering::Acquire),
6607 "We don't support claim_htlc claims during startup - monitors may not be available yet");
6608 if let Some(pubkey) = next_channel_counterparty_node_id {
6609 debug_assert_eq!(pubkey, path.hops[0].pubkey);
6611 let ev_completion_action = EventCompletionAction::ReleaseRAAChannelMonitorUpdate {
6612 channel_funding_outpoint: next_channel_outpoint, channel_id: next_channel_id,
6613 counterparty_node_id: path.hops[0].pubkey,
6615 self.pending_outbound_payments.claim_htlc(payment_id, payment_preimage,
6616 session_priv, path, from_onchain, ev_completion_action, &self.pending_events,
6619 HTLCSource::PreviousHopData(hop_data) => {
6620 let prev_channel_id = hop_data.channel_id;
6621 let prev_user_channel_id = hop_data.user_channel_id;
6622 let completed_blocker = RAAMonitorUpdateBlockingAction::from_prev_hop_data(&hop_data);
6623 #[cfg(debug_assertions)]
6624 let claiming_chan_funding_outpoint = hop_data.outpoint;
6625 let res = self.claim_funds_from_hop(hop_data, payment_preimage,
6626 |htlc_claim_value_msat, definitely_duplicate| {
6627 let chan_to_release =
6628 if let Some(node_id) = next_channel_counterparty_node_id {
6629 Some((node_id, next_channel_outpoint, next_channel_id, completed_blocker))
6631 // We can only get `None` here if we are processing a
6632 // `ChannelMonitor`-originated event, in which case we
6633 // don't care about ensuring we wake the downstream
6634 // channel's monitor updating - the channel is already
6639 if definitely_duplicate && startup_replay {
6640 // On startup we may get redundant claims which are related to
6641 // monitor updates still in flight. In that case, we shouldn't
6642 // immediately free, but instead let that monitor update complete
6643 // in the background.
6644 #[cfg(debug_assertions)] {
6645 let background_events = self.pending_background_events.lock().unwrap();
6646 // There should be a `BackgroundEvent` pending...
6647 assert!(background_events.iter().any(|ev| {
6649 // to apply a monitor update that blocked the claiming channel,
6650 BackgroundEvent::MonitorUpdateRegeneratedOnStartup {
6651 funding_txo, update, ..
6653 if *funding_txo == claiming_chan_funding_outpoint {
6654 assert!(update.updates.iter().any(|upd|
6655 if let ChannelMonitorUpdateStep::PaymentPreimage {
6656 payment_preimage: update_preimage
6658 payment_preimage == *update_preimage
6664 // or the channel we'd unblock is already closed,
6665 BackgroundEvent::ClosedMonitorUpdateRegeneratedOnStartup(
6666 (funding_txo, _channel_id, monitor_update)
6668 if *funding_txo == next_channel_outpoint {
6669 assert_eq!(monitor_update.updates.len(), 1);
6671 monitor_update.updates[0],
6672 ChannelMonitorUpdateStep::ChannelForceClosed { .. }
6677 // or the monitor update has completed and will unblock
6678 // immediately once we get going.
6679 BackgroundEvent::MonitorUpdatesComplete {
6682 *channel_id == prev_channel_id,
6684 }), "{:?}", *background_events);
6687 } else if definitely_duplicate {
6688 if let Some(other_chan) = chan_to_release {
6689 Some(MonitorUpdateCompletionAction::FreeOtherChannelImmediately {
6690 downstream_counterparty_node_id: other_chan.0,
6691 downstream_funding_outpoint: other_chan.1,
6692 downstream_channel_id: other_chan.2,
6693 blocking_action: other_chan.3,
6697 let total_fee_earned_msat = if let Some(forwarded_htlc_value) = forwarded_htlc_value_msat {
6698 if let Some(claimed_htlc_value) = htlc_claim_value_msat {
6699 Some(claimed_htlc_value - forwarded_htlc_value)
6702 debug_assert!(skimmed_fee_msat <= total_fee_earned_msat,
6703 "skimmed_fee_msat must always be included in total_fee_earned_msat");
6704 Some(MonitorUpdateCompletionAction::EmitEventAndFreeOtherChannel {
6705 event: events::Event::PaymentForwarded {
6706 prev_channel_id: Some(prev_channel_id),
6707 next_channel_id: Some(next_channel_id),
6708 prev_user_channel_id,
6709 next_user_channel_id,
6710 total_fee_earned_msat,
6712 claim_from_onchain_tx: from_onchain,
6713 outbound_amount_forwarded_msat: forwarded_htlc_value_msat,
6715 downstream_counterparty_and_funding_outpoint: chan_to_release,
6719 if let Err((pk, err)) = res {
6720 let result: Result<(), _> = Err(err);
6721 let _ = handle_error!(self, result, pk);
6727 /// Gets the node_id held by this ChannelManager
6728 pub fn get_our_node_id(&self) -> PublicKey {
6729 self.our_network_pubkey.clone()
6732 fn handle_monitor_update_completion_actions<I: IntoIterator<Item=MonitorUpdateCompletionAction>>(&self, actions: I) {
6733 debug_assert_ne!(self.pending_events.held_by_thread(), LockHeldState::HeldByThread);
6734 debug_assert_ne!(self.claimable_payments.held_by_thread(), LockHeldState::HeldByThread);
6735 debug_assert_ne!(self.per_peer_state.held_by_thread(), LockHeldState::HeldByThread);
6737 for action in actions.into_iter() {
6739 MonitorUpdateCompletionAction::PaymentClaimed { payment_hash } => {
6740 let payment = self.claimable_payments.lock().unwrap().pending_claiming_payments.remove(&payment_hash);
6741 if let Some(ClaimingPayment {
6743 payment_purpose: purpose,
6746 sender_intended_value: sender_intended_total_msat,
6748 self.pending_events.lock().unwrap().push_back((events::Event::PaymentClaimed {
6752 receiver_node_id: Some(receiver_node_id),
6754 sender_intended_total_msat,
6758 MonitorUpdateCompletionAction::EmitEventAndFreeOtherChannel {
6759 event, downstream_counterparty_and_funding_outpoint
6761 self.pending_events.lock().unwrap().push_back((event, None));
6762 if let Some((node_id, funding_outpoint, channel_id, blocker)) = downstream_counterparty_and_funding_outpoint {
6763 self.handle_monitor_update_release(node_id, funding_outpoint, channel_id, Some(blocker));
6766 MonitorUpdateCompletionAction::FreeOtherChannelImmediately {
6767 downstream_counterparty_node_id, downstream_funding_outpoint, downstream_channel_id, blocking_action,
6769 self.handle_monitor_update_release(
6770 downstream_counterparty_node_id,
6771 downstream_funding_outpoint,
6772 downstream_channel_id,
6773 Some(blocking_action),
6780 /// Handles a channel reentering a functional state, either due to reconnect or a monitor
6781 /// update completion.
6782 fn handle_channel_resumption(&self, pending_msg_events: &mut Vec<MessageSendEvent>,
6783 channel: &mut Channel<SP>, raa: Option<msgs::RevokeAndACK>,
6784 commitment_update: Option<msgs::CommitmentUpdate>, order: RAACommitmentOrder,
6785 pending_forwards: Vec<(PendingHTLCInfo, u64)>, pending_update_adds: Vec<msgs::UpdateAddHTLC>,
6786 funding_broadcastable: Option<Transaction>,
6787 channel_ready: Option<msgs::ChannelReady>, announcement_sigs: Option<msgs::AnnouncementSignatures>)
6788 -> (Option<(u64, OutPoint, ChannelId, u128, Vec<(PendingHTLCInfo, u64)>)>, Option<(u64, Vec<msgs::UpdateAddHTLC>)>) {
6789 let logger = WithChannelContext::from(&self.logger, &channel.context, None);
6790 log_trace!(logger, "Handling channel resumption for channel {} with {} RAA, {} commitment update, {} pending forwards, {} pending update_add_htlcs, {}broadcasting funding, {} channel ready, {} announcement",
6791 &channel.context.channel_id(),
6792 if raa.is_some() { "an" } else { "no" },
6793 if commitment_update.is_some() { "a" } else { "no" },
6794 pending_forwards.len(), pending_update_adds.len(),
6795 if funding_broadcastable.is_some() { "" } else { "not " },
6796 if channel_ready.is_some() { "sending" } else { "without" },
6797 if announcement_sigs.is_some() { "sending" } else { "without" });
6799 let counterparty_node_id = channel.context.get_counterparty_node_id();
6800 let short_channel_id = channel.context.get_short_channel_id().unwrap_or(channel.context.outbound_scid_alias());
6802 let mut htlc_forwards = None;
6803 if !pending_forwards.is_empty() {
6804 htlc_forwards = Some((short_channel_id, channel.context.get_funding_txo().unwrap(),
6805 channel.context.channel_id(), channel.context.get_user_id(), pending_forwards));
6807 let mut decode_update_add_htlcs = None;
6808 if !pending_update_adds.is_empty() {
6809 decode_update_add_htlcs = Some((short_channel_id, pending_update_adds));
6812 if let Some(msg) = channel_ready {
6813 send_channel_ready!(self, pending_msg_events, channel, msg);
6815 if let Some(msg) = announcement_sigs {
6816 pending_msg_events.push(events::MessageSendEvent::SendAnnouncementSignatures {
6817 node_id: counterparty_node_id,
6822 macro_rules! handle_cs { () => {
6823 if let Some(update) = commitment_update {
6824 pending_msg_events.push(events::MessageSendEvent::UpdateHTLCs {
6825 node_id: counterparty_node_id,
6830 macro_rules! handle_raa { () => {
6831 if let Some(revoke_and_ack) = raa {
6832 pending_msg_events.push(events::MessageSendEvent::SendRevokeAndACK {
6833 node_id: counterparty_node_id,
6834 msg: revoke_and_ack,
6839 RAACommitmentOrder::CommitmentFirst => {
6843 RAACommitmentOrder::RevokeAndACKFirst => {
6849 if let Some(tx) = funding_broadcastable {
6850 log_info!(logger, "Broadcasting funding transaction with txid {}", tx.txid());
6851 self.tx_broadcaster.broadcast_transactions(&[&tx]);
6855 let mut pending_events = self.pending_events.lock().unwrap();
6856 emit_channel_pending_event!(pending_events, channel);
6857 emit_channel_ready_event!(pending_events, channel);
6860 (htlc_forwards, decode_update_add_htlcs)
6863 fn channel_monitor_updated(&self, funding_txo: &OutPoint, channel_id: &ChannelId, highest_applied_update_id: u64, counterparty_node_id: Option<&PublicKey>) {
6864 debug_assert!(self.total_consistency_lock.try_write().is_err()); // Caller holds read lock
6866 let counterparty_node_id = match counterparty_node_id {
6867 Some(cp_id) => cp_id.clone(),
6869 // TODO: Once we can rely on the counterparty_node_id from the
6870 // monitor event, this and the outpoint_to_peer map should be removed.
6871 let outpoint_to_peer = self.outpoint_to_peer.lock().unwrap();
6872 match outpoint_to_peer.get(funding_txo) {
6873 Some(cp_id) => cp_id.clone(),
6878 let per_peer_state = self.per_peer_state.read().unwrap();
6879 let mut peer_state_lock;
6880 let peer_state_mutex_opt = per_peer_state.get(&counterparty_node_id);
6881 if peer_state_mutex_opt.is_none() { return }
6882 peer_state_lock = peer_state_mutex_opt.unwrap().lock().unwrap();
6883 let peer_state = &mut *peer_state_lock;
6885 if let Some(ChannelPhase::Funded(chan)) = peer_state.channel_by_id.get_mut(channel_id) {
6888 let update_actions = peer_state.monitor_update_blocked_actions
6889 .remove(&channel_id).unwrap_or(Vec::new());
6890 mem::drop(peer_state_lock);
6891 mem::drop(per_peer_state);
6892 self.handle_monitor_update_completion_actions(update_actions);
6895 let remaining_in_flight =
6896 if let Some(pending) = peer_state.in_flight_monitor_updates.get_mut(funding_txo) {
6897 pending.retain(|upd| upd.update_id > highest_applied_update_id);
6900 let logger = WithChannelContext::from(&self.logger, &channel.context, None);
6901 log_trace!(logger, "ChannelMonitor updated to {}. Current highest is {}. {} pending in-flight updates.",
6902 highest_applied_update_id, channel.context.get_latest_monitor_update_id(),
6903 remaining_in_flight);
6904 if !channel.is_awaiting_monitor_update() || channel.context.get_latest_monitor_update_id() != highest_applied_update_id {
6907 handle_monitor_update_completion!(self, peer_state_lock, peer_state, per_peer_state, channel);
6910 /// Accepts a request to open a channel after a [`Event::OpenChannelRequest`].
6912 /// The `temporary_channel_id` parameter indicates which inbound channel should be accepted,
6913 /// and the `counterparty_node_id` parameter is the id of the peer which has requested to open
6916 /// The `user_channel_id` parameter will be provided back in
6917 /// [`Event::ChannelClosed::user_channel_id`] to allow tracking of which events correspond
6918 /// with which `accept_inbound_channel`/`accept_inbound_channel_from_trusted_peer_0conf` call.
6920 /// Note that this method will return an error and reject the channel, if it requires support
6921 /// for zero confirmations. Instead, `accept_inbound_channel_from_trusted_peer_0conf` must be
6922 /// used to accept such channels.
6924 /// [`Event::OpenChannelRequest`]: events::Event::OpenChannelRequest
6925 /// [`Event::ChannelClosed::user_channel_id`]: events::Event::ChannelClosed::user_channel_id
6926 pub fn accept_inbound_channel(&self, temporary_channel_id: &ChannelId, counterparty_node_id: &PublicKey, user_channel_id: u128) -> Result<(), APIError> {
6927 self.do_accept_inbound_channel(temporary_channel_id, counterparty_node_id, false, user_channel_id)
6930 /// Accepts a request to open a channel after a [`events::Event::OpenChannelRequest`], treating
6931 /// it as confirmed immediately.
6933 /// The `user_channel_id` parameter will be provided back in
6934 /// [`Event::ChannelClosed::user_channel_id`] to allow tracking of which events correspond
6935 /// with which `accept_inbound_channel`/`accept_inbound_channel_from_trusted_peer_0conf` call.
6937 /// Unlike [`ChannelManager::accept_inbound_channel`], this method accepts the incoming channel
6938 /// and (if the counterparty agrees), enables forwarding of payments immediately.
6940 /// This fully trusts that the counterparty has honestly and correctly constructed the funding
6941 /// transaction and blindly assumes that it will eventually confirm.
6943 /// If it does not confirm before we decide to close the channel, or if the funding transaction
6944 /// does not pay to the correct script the correct amount, *you will lose funds*.
6946 /// [`Event::OpenChannelRequest`]: events::Event::OpenChannelRequest
6947 /// [`Event::ChannelClosed::user_channel_id`]: events::Event::ChannelClosed::user_channel_id
6948 pub fn accept_inbound_channel_from_trusted_peer_0conf(&self, temporary_channel_id: &ChannelId, counterparty_node_id: &PublicKey, user_channel_id: u128) -> Result<(), APIError> {
6949 self.do_accept_inbound_channel(temporary_channel_id, counterparty_node_id, true, user_channel_id)
6952 fn do_accept_inbound_channel(&self, temporary_channel_id: &ChannelId, counterparty_node_id: &PublicKey, accept_0conf: bool, user_channel_id: u128) -> Result<(), APIError> {
6954 let logger = WithContext::from(&self.logger, Some(*counterparty_node_id), Some(*temporary_channel_id), None);
6955 let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
6957 let peers_without_funded_channels =
6958 self.peers_without_funded_channels(|peer| { peer.total_channel_count() > 0 });
6959 let per_peer_state = self.per_peer_state.read().unwrap();
6960 let peer_state_mutex = per_peer_state.get(counterparty_node_id)
6962 let err_str = format!("Can't find a peer matching the passed counterparty node_id {}", counterparty_node_id);
6963 log_error!(logger, "{}", err_str);
6965 APIError::ChannelUnavailable { err: err_str }
6967 let mut peer_state_lock = peer_state_mutex.lock().unwrap();
6968 let peer_state = &mut *peer_state_lock;
6969 let is_only_peer_channel = peer_state.total_channel_count() == 1;
6971 // Find (and remove) the channel in the unaccepted table. If it's not there, something weird is
6972 // happening and return an error. N.B. that we create channel with an outbound SCID of zero so
6973 // that we can delay allocating the SCID until after we're sure that the checks below will
6975 let res = match peer_state.inbound_channel_request_by_id.remove(temporary_channel_id) {
6976 Some(unaccepted_channel) => {
6977 let best_block_height = self.best_block.read().unwrap().height;
6978 InboundV1Channel::new(&self.fee_estimator, &self.entropy_source, &self.signer_provider,
6979 counterparty_node_id.clone(), &self.channel_type_features(), &peer_state.latest_features,
6980 &unaccepted_channel.open_channel_msg, user_channel_id, &self.default_configuration, best_block_height,
6981 &self.logger, accept_0conf).map_err(|err| MsgHandleErrInternal::from_chan_no_close(err, *temporary_channel_id))
6984 let err_str = "No such channel awaiting to be accepted.".to_owned();
6985 log_error!(logger, "{}", err_str);
6987 return Err(APIError::APIMisuseError { err: err_str });
6993 mem::drop(peer_state_lock);
6994 mem::drop(per_peer_state);
6995 match handle_error!(self, Result::<(), MsgHandleErrInternal>::Err(err), *counterparty_node_id) {
6996 Ok(_) => unreachable!("`handle_error` only returns Err as we've passed in an Err"),
6998 return Err(APIError::ChannelUnavailable { err: e.err });
7002 Ok(mut channel) => {
7004 // This should have been correctly configured by the call to InboundV1Channel::new.
7005 debug_assert!(channel.context.minimum_depth().unwrap() == 0);
7006 } else if channel.context.get_channel_type().requires_zero_conf() {
7007 let send_msg_err_event = events::MessageSendEvent::HandleError {
7008 node_id: channel.context.get_counterparty_node_id(),
7009 action: msgs::ErrorAction::SendErrorMessage{
7010 msg: msgs::ErrorMessage { channel_id: temporary_channel_id.clone(), data: "No zero confirmation channels accepted".to_owned(), }
7013 peer_state.pending_msg_events.push(send_msg_err_event);
7014 let err_str = "Please use accept_inbound_channel_from_trusted_peer_0conf to accept channels with zero confirmations.".to_owned();
7015 log_error!(logger, "{}", err_str);
7017 return Err(APIError::APIMisuseError { err: err_str });
7019 // If this peer already has some channels, a new channel won't increase our number of peers
7020 // with unfunded channels, so as long as we aren't over the maximum number of unfunded
7021 // channels per-peer we can accept channels from a peer with existing ones.
7022 if is_only_peer_channel && peers_without_funded_channels >= MAX_UNFUNDED_CHANNEL_PEERS {
7023 let send_msg_err_event = events::MessageSendEvent::HandleError {
7024 node_id: channel.context.get_counterparty_node_id(),
7025 action: msgs::ErrorAction::SendErrorMessage{
7026 msg: msgs::ErrorMessage { channel_id: temporary_channel_id.clone(), data: "Have too many peers with unfunded channels, not accepting new ones".to_owned(), }
7029 peer_state.pending_msg_events.push(send_msg_err_event);
7030 let err_str = "Too many peers with unfunded channels, refusing to accept new ones".to_owned();
7031 log_error!(logger, "{}", err_str);
7033 return Err(APIError::APIMisuseError { err: err_str });
7037 // Now that we know we have a channel, assign an outbound SCID alias.
7038 let outbound_scid_alias = self.create_and_insert_outbound_scid_alias();
7039 channel.context.set_outbound_scid_alias(outbound_scid_alias);
7041 peer_state.pending_msg_events.push(events::MessageSendEvent::SendAcceptChannel {
7042 node_id: channel.context.get_counterparty_node_id(),
7043 msg: channel.accept_inbound_channel(),
7046 peer_state.channel_by_id.insert(temporary_channel_id.clone(), ChannelPhase::UnfundedInboundV1(channel));
7053 /// Gets the number of peers which match the given filter and do not have any funded, outbound,
7054 /// or 0-conf channels.
7056 /// The filter is called for each peer and provided with the number of unfunded, inbound, and
7057 /// non-0-conf channels we have with the peer.
7058 fn peers_without_funded_channels<Filter>(&self, maybe_count_peer: Filter) -> usize
7059 where Filter: Fn(&PeerState<SP>) -> bool {
7060 let mut peers_without_funded_channels = 0;
7061 let best_block_height = self.best_block.read().unwrap().height;
7063 let peer_state_lock = self.per_peer_state.read().unwrap();
7064 for (_, peer_mtx) in peer_state_lock.iter() {
7065 let peer = peer_mtx.lock().unwrap();
7066 if !maybe_count_peer(&*peer) { continue; }
7067 let num_unfunded_channels = Self::unfunded_channel_count(&peer, best_block_height);
7068 if num_unfunded_channels == peer.total_channel_count() {
7069 peers_without_funded_channels += 1;
7073 return peers_without_funded_channels;
7076 fn unfunded_channel_count(
7077 peer: &PeerState<SP>, best_block_height: u32
7079 let mut num_unfunded_channels = 0;
7080 for (_, phase) in peer.channel_by_id.iter() {
7082 ChannelPhase::Funded(chan) => {
7083 // This covers non-zero-conf inbound `Channel`s that we are currently monitoring, but those
7084 // which have not yet had any confirmations on-chain.
7085 if !chan.context.is_outbound() && chan.context.minimum_depth().unwrap_or(1) != 0 &&
7086 chan.context.get_funding_tx_confirmations(best_block_height) == 0
7088 num_unfunded_channels += 1;
7091 ChannelPhase::UnfundedInboundV1(chan) => {
7092 if chan.context.minimum_depth().unwrap_or(1) != 0 {
7093 num_unfunded_channels += 1;
7096 // TODO(dual_funding): Combine this match arm with above once #[cfg(any(dual_funding, splicing))] is removed.
7097 #[cfg(any(dual_funding, splicing))]
7098 ChannelPhase::UnfundedInboundV2(chan) => {
7099 // Only inbound V2 channels that are not 0conf and that we do not contribute to will be
7100 // included in the unfunded count.
7101 if chan.context.minimum_depth().unwrap_or(1) != 0 &&
7102 chan.dual_funding_context.our_funding_satoshis == 0 {
7103 num_unfunded_channels += 1;
7106 ChannelPhase::UnfundedOutboundV1(_) => {
7107 // Outbound channels don't contribute to the unfunded count in the DoS context.
7110 // TODO(dual_funding): Combine this match arm with above once #[cfg(any(dual_funding, splicing))] is removed.
7111 #[cfg(any(dual_funding, splicing))]
7112 ChannelPhase::UnfundedOutboundV2(_) => {
7113 // Outbound channels don't contribute to the unfunded count in the DoS context.
7118 num_unfunded_channels + peer.inbound_channel_request_by_id.len()
7121 fn internal_open_channel(&self, counterparty_node_id: &PublicKey, msg: &msgs::OpenChannel) -> Result<(), MsgHandleErrInternal> {
7122 // Note that the ChannelManager is NOT re-persisted on disk after this, so any changes are
7123 // likely to be lost on restart!
7124 if msg.common_fields.chain_hash != self.chain_hash {
7125 return Err(MsgHandleErrInternal::send_err_msg_no_close("Unknown genesis block hash".to_owned(),
7126 msg.common_fields.temporary_channel_id.clone()));
7129 if !self.default_configuration.accept_inbound_channels {
7130 return Err(MsgHandleErrInternal::send_err_msg_no_close("No inbound channels accepted".to_owned(),
7131 msg.common_fields.temporary_channel_id.clone()));
7134 // Get the number of peers with channels, but without funded ones. We don't care too much
7135 // about peers that never open a channel, so we filter by peers that have at least one
7136 // channel, and then limit the number of those with unfunded channels.
7137 let channeled_peers_without_funding =
7138 self.peers_without_funded_channels(|node| node.total_channel_count() > 0);
7140 let per_peer_state = self.per_peer_state.read().unwrap();
7141 let peer_state_mutex = per_peer_state.get(counterparty_node_id)
7143 debug_assert!(false);
7144 MsgHandleErrInternal::send_err_msg_no_close(
7145 format!("Can't find a peer matching the passed counterparty node_id {}", counterparty_node_id),
7146 msg.common_fields.temporary_channel_id.clone())
7148 let mut peer_state_lock = peer_state_mutex.lock().unwrap();
7149 let peer_state = &mut *peer_state_lock;
7151 // If this peer already has some channels, a new channel won't increase our number of peers
7152 // with unfunded channels, so as long as we aren't over the maximum number of unfunded
7153 // channels per-peer we can accept channels from a peer with existing ones.
7154 if peer_state.total_channel_count() == 0 &&
7155 channeled_peers_without_funding >= MAX_UNFUNDED_CHANNEL_PEERS &&
7156 !self.default_configuration.manually_accept_inbound_channels
7158 return Err(MsgHandleErrInternal::send_err_msg_no_close(
7159 "Have too many peers with unfunded channels, not accepting new ones".to_owned(),
7160 msg.common_fields.temporary_channel_id.clone()));
7163 let best_block_height = self.best_block.read().unwrap().height;
7164 if Self::unfunded_channel_count(peer_state, best_block_height) >= MAX_UNFUNDED_CHANS_PER_PEER {
7165 return Err(MsgHandleErrInternal::send_err_msg_no_close(
7166 format!("Refusing more than {} unfunded channels.", MAX_UNFUNDED_CHANS_PER_PEER),
7167 msg.common_fields.temporary_channel_id.clone()));
7170 let channel_id = msg.common_fields.temporary_channel_id;
7171 let channel_exists = peer_state.has_channel(&channel_id);
7173 return Err(MsgHandleErrInternal::send_err_msg_no_close(
7174 "temporary_channel_id collision for the same peer!".to_owned(),
7175 msg.common_fields.temporary_channel_id.clone()));
7178 // If we're doing manual acceptance checks on the channel, then defer creation until we're sure we want to accept.
7179 if self.default_configuration.manually_accept_inbound_channels {
7180 let channel_type = channel::channel_type_from_open_channel(
7181 &msg.common_fields, &peer_state.latest_features, &self.channel_type_features()
7183 MsgHandleErrInternal::from_chan_no_close(e, msg.common_fields.temporary_channel_id)
7185 let mut pending_events = self.pending_events.lock().unwrap();
7186 pending_events.push_back((events::Event::OpenChannelRequest {
7187 temporary_channel_id: msg.common_fields.temporary_channel_id.clone(),
7188 counterparty_node_id: counterparty_node_id.clone(),
7189 funding_satoshis: msg.common_fields.funding_satoshis,
7190 push_msat: msg.push_msat,
7193 peer_state.inbound_channel_request_by_id.insert(channel_id, InboundChannelRequest {
7194 open_channel_msg: msg.clone(),
7195 ticks_remaining: UNACCEPTED_INBOUND_CHANNEL_AGE_LIMIT_TICKS,
7200 // Otherwise create the channel right now.
7201 let mut random_bytes = [0u8; 16];
7202 random_bytes.copy_from_slice(&self.entropy_source.get_secure_random_bytes()[..16]);
7203 let user_channel_id = u128::from_be_bytes(random_bytes);
7204 let mut channel = match InboundV1Channel::new(&self.fee_estimator, &self.entropy_source, &self.signer_provider,
7205 counterparty_node_id.clone(), &self.channel_type_features(), &peer_state.latest_features, msg, user_channel_id,
7206 &self.default_configuration, best_block_height, &self.logger, /*is_0conf=*/false)
7209 return Err(MsgHandleErrInternal::from_chan_no_close(e, msg.common_fields.temporary_channel_id));
7214 let channel_type = channel.context.get_channel_type();
7215 if channel_type.requires_zero_conf() {
7216 return Err(MsgHandleErrInternal::send_err_msg_no_close(
7217 "No zero confirmation channels accepted".to_owned(),
7218 msg.common_fields.temporary_channel_id.clone()));
7220 if channel_type.requires_anchors_zero_fee_htlc_tx() {
7221 return Err(MsgHandleErrInternal::send_err_msg_no_close(
7222 "No channels with anchor outputs accepted".to_owned(),
7223 msg.common_fields.temporary_channel_id.clone()));
7226 let outbound_scid_alias = self.create_and_insert_outbound_scid_alias();
7227 channel.context.set_outbound_scid_alias(outbound_scid_alias);
7229 peer_state.pending_msg_events.push(events::MessageSendEvent::SendAcceptChannel {
7230 node_id: counterparty_node_id.clone(),
7231 msg: channel.accept_inbound_channel(),
7233 peer_state.channel_by_id.insert(channel_id, ChannelPhase::UnfundedInboundV1(channel));
7237 fn internal_accept_channel(&self, counterparty_node_id: &PublicKey, msg: &msgs::AcceptChannel) -> Result<(), MsgHandleErrInternal> {
7238 // Note that the ChannelManager is NOT re-persisted on disk after this, so any changes are
7239 // likely to be lost on restart!
7240 let (value, output_script, user_id) = {
7241 let per_peer_state = self.per_peer_state.read().unwrap();
7242 let peer_state_mutex = per_peer_state.get(counterparty_node_id)
7244 debug_assert!(false);
7245 MsgHandleErrInternal::send_err_msg_no_close(format!("Can't find a peer matching the passed counterparty node_id {}", counterparty_node_id), msg.common_fields.temporary_channel_id)
7247 let mut peer_state_lock = peer_state_mutex.lock().unwrap();
7248 let peer_state = &mut *peer_state_lock;
7249 match peer_state.channel_by_id.entry(msg.common_fields.temporary_channel_id) {
7250 hash_map::Entry::Occupied(mut phase) => {
7251 match phase.get_mut() {
7252 ChannelPhase::UnfundedOutboundV1(chan) => {
7253 try_chan_phase_entry!(self, chan.accept_channel(&msg, &self.default_configuration.channel_handshake_limits, &peer_state.latest_features), phase);
7254 (chan.context.get_value_satoshis(), chan.context.get_funding_redeemscript().to_v0_p2wsh(), chan.context.get_user_id())
7257 return Err(MsgHandleErrInternal::send_err_msg_no_close(format!("Got an unexpected accept_channel message from peer with counterparty_node_id {}", counterparty_node_id), msg.common_fields.temporary_channel_id));
7261 hash_map::Entry::Vacant(_) => return Err(MsgHandleErrInternal::send_err_msg_no_close(format!("Got a message for a channel from the wrong node! No such channel for the passed counterparty_node_id {}", counterparty_node_id), msg.common_fields.temporary_channel_id))
7264 let mut pending_events = self.pending_events.lock().unwrap();
7265 pending_events.push_back((events::Event::FundingGenerationReady {
7266 temporary_channel_id: msg.common_fields.temporary_channel_id,
7267 counterparty_node_id: *counterparty_node_id,
7268 channel_value_satoshis: value,
7270 user_channel_id: user_id,
7275 fn internal_funding_created(&self, counterparty_node_id: &PublicKey, msg: &msgs::FundingCreated) -> Result<(), MsgHandleErrInternal> {
7276 let best_block = *self.best_block.read().unwrap();
7278 let per_peer_state = self.per_peer_state.read().unwrap();
7279 let peer_state_mutex = per_peer_state.get(counterparty_node_id)
7281 debug_assert!(false);
7282 MsgHandleErrInternal::send_err_msg_no_close(format!("Can't find a peer matching the passed counterparty node_id {}", counterparty_node_id), msg.temporary_channel_id)
7285 let mut peer_state_lock = peer_state_mutex.lock().unwrap();
7286 let peer_state = &mut *peer_state_lock;
7287 let (mut chan, funding_msg_opt, monitor) =
7288 match peer_state.channel_by_id.remove(&msg.temporary_channel_id) {
7289 Some(ChannelPhase::UnfundedInboundV1(inbound_chan)) => {
7290 let logger = WithChannelContext::from(&self.logger, &inbound_chan.context, None);
7291 match inbound_chan.funding_created(msg, best_block, &self.signer_provider, &&logger) {
7293 Err((inbound_chan, err)) => {
7294 // We've already removed this inbound channel from the map in `PeerState`
7295 // above so at this point we just need to clean up any lingering entries
7296 // concerning this channel as it is safe to do so.
7297 debug_assert!(matches!(err, ChannelError::Close(_)));
7298 // Really we should be returning the channel_id the peer expects based
7299 // on their funding info here, but they're horribly confused anyway, so
7300 // there's not a lot we can do to save them.
7301 return Err(convert_chan_phase_err!(self, err, &mut ChannelPhase::UnfundedInboundV1(inbound_chan), &msg.temporary_channel_id).1);
7305 Some(mut phase) => {
7306 let err_msg = format!("Got an unexpected funding_created message from peer with counterparty_node_id {}", counterparty_node_id);
7307 let err = ChannelError::Close(err_msg);
7308 return Err(convert_chan_phase_err!(self, err, &mut phase, &msg.temporary_channel_id).1);
7310 None => return Err(MsgHandleErrInternal::send_err_msg_no_close(format!("Got a message for a channel from the wrong node! No such channel for the passed counterparty_node_id {}", counterparty_node_id), msg.temporary_channel_id))
7313 let funded_channel_id = chan.context.channel_id();
7315 macro_rules! fail_chan { ($err: expr) => { {
7316 // Note that at this point we've filled in the funding outpoint on our
7317 // channel, but its actually in conflict with another channel. Thus, if
7318 // we call `convert_chan_phase_err` immediately (thus calling
7319 // `update_maps_on_chan_removal`), we'll remove the existing channel
7320 // from `outpoint_to_peer`. Thus, we must first unset the funding outpoint
7322 let err = ChannelError::Close($err.to_owned());
7323 chan.unset_funding_info(msg.temporary_channel_id);
7324 return Err(convert_chan_phase_err!(self, err, chan, &funded_channel_id, UNFUNDED_CHANNEL).1);
7327 match peer_state.channel_by_id.entry(funded_channel_id) {
7328 hash_map::Entry::Occupied(_) => {
7329 fail_chan!("Already had channel with the new channel_id");
7331 hash_map::Entry::Vacant(e) => {
7332 let mut outpoint_to_peer_lock = self.outpoint_to_peer.lock().unwrap();
7333 match outpoint_to_peer_lock.entry(monitor.get_funding_txo().0) {
7334 hash_map::Entry::Occupied(_) => {
7335 fail_chan!("The funding_created message had the same funding_txid as an existing channel - funding is not possible");
7337 hash_map::Entry::Vacant(i_e) => {
7338 let monitor_res = self.chain_monitor.watch_channel(monitor.get_funding_txo().0, monitor);
7339 if let Ok(persist_state) = monitor_res {
7340 i_e.insert(chan.context.get_counterparty_node_id());
7341 mem::drop(outpoint_to_peer_lock);
7343 // There's no problem signing a counterparty's funding transaction if our monitor
7344 // hasn't persisted to disk yet - we can't lose money on a transaction that we haven't
7345 // accepted payment from yet. We do, however, need to wait to send our channel_ready
7346 // until we have persisted our monitor.
7347 if let Some(msg) = funding_msg_opt {
7348 peer_state.pending_msg_events.push(events::MessageSendEvent::SendFundingSigned {
7349 node_id: counterparty_node_id.clone(),
7354 if let ChannelPhase::Funded(chan) = e.insert(ChannelPhase::Funded(chan)) {
7355 handle_new_monitor_update!(self, persist_state, peer_state_lock, peer_state,
7356 per_peer_state, chan, INITIAL_MONITOR);
7358 unreachable!("This must be a funded channel as we just inserted it.");
7362 let logger = WithChannelContext::from(&self.logger, &chan.context, None);
7363 log_error!(logger, "Persisting initial ChannelMonitor failed, implying the funding outpoint was duplicated");
7364 fail_chan!("Duplicate funding outpoint");
7372 fn internal_funding_signed(&self, counterparty_node_id: &PublicKey, msg: &msgs::FundingSigned) -> Result<(), MsgHandleErrInternal> {
7373 let best_block = *self.best_block.read().unwrap();
7374 let per_peer_state = self.per_peer_state.read().unwrap();
7375 let peer_state_mutex = per_peer_state.get(counterparty_node_id)
7377 debug_assert!(false);
7378 MsgHandleErrInternal::send_err_msg_no_close(format!("Can't find a peer matching the passed counterparty node_id {}", counterparty_node_id), msg.channel_id)
7381 let mut peer_state_lock = peer_state_mutex.lock().unwrap();
7382 let peer_state = &mut *peer_state_lock;
7383 match peer_state.channel_by_id.entry(msg.channel_id) {
7384 hash_map::Entry::Occupied(chan_phase_entry) => {
7385 if matches!(chan_phase_entry.get(), ChannelPhase::UnfundedOutboundV1(_)) {
7386 let chan = if let ChannelPhase::UnfundedOutboundV1(chan) = chan_phase_entry.remove() { chan } else { unreachable!() };
7387 let logger = WithContext::from(
7389 Some(chan.context.get_counterparty_node_id()),
7390 Some(chan.context.channel_id()),
7394 chan.funding_signed(&msg, best_block, &self.signer_provider, &&logger);
7396 Ok((mut chan, monitor)) => {
7397 if let Ok(persist_status) = self.chain_monitor.watch_channel(chan.context.get_funding_txo().unwrap(), monitor) {
7398 // We really should be able to insert here without doing a second
7399 // lookup, but sadly rust stdlib doesn't currently allow keeping
7400 // the original Entry around with the value removed.
7401 let mut chan = peer_state.channel_by_id.entry(msg.channel_id).or_insert(ChannelPhase::Funded(chan));
7402 if let ChannelPhase::Funded(ref mut chan) = &mut chan {
7403 handle_new_monitor_update!(self, persist_status, peer_state_lock, peer_state, per_peer_state, chan, INITIAL_MONITOR);
7404 } else { unreachable!(); }
7407 let e = ChannelError::Close("Channel funding outpoint was a duplicate".to_owned());
7408 // We weren't able to watch the channel to begin with, so no
7409 // updates should be made on it. Previously, full_stack_target
7410 // found an (unreachable) panic when the monitor update contained
7411 // within `shutdown_finish` was applied.
7412 chan.unset_funding_info(msg.channel_id);
7413 return Err(convert_chan_phase_err!(self, e, &mut ChannelPhase::Funded(chan), &msg.channel_id).1);
7417 debug_assert!(matches!(e, ChannelError::Close(_)),
7418 "We don't have a channel anymore, so the error better have expected close");
7419 // We've already removed this outbound channel from the map in
7420 // `PeerState` above so at this point we just need to clean up any
7421 // lingering entries concerning this channel as it is safe to do so.
7422 return Err(convert_chan_phase_err!(self, e, &mut ChannelPhase::UnfundedOutboundV1(chan), &msg.channel_id).1);
7426 return Err(MsgHandleErrInternal::send_err_msg_no_close("Failed to find corresponding channel".to_owned(), msg.channel_id));
7429 hash_map::Entry::Vacant(_) => return Err(MsgHandleErrInternal::send_err_msg_no_close("Failed to find corresponding channel".to_owned(), msg.channel_id))
7433 fn internal_channel_ready(&self, counterparty_node_id: &PublicKey, msg: &msgs::ChannelReady) -> Result<(), MsgHandleErrInternal> {
7434 // Note that the ChannelManager is NOT re-persisted on disk after this (unless we error
7435 // closing a channel), so any changes are likely to be lost on restart!
7436 let per_peer_state = self.per_peer_state.read().unwrap();
7437 let peer_state_mutex = per_peer_state.get(counterparty_node_id)
7439 debug_assert!(false);
7440 MsgHandleErrInternal::send_err_msg_no_close(format!("Can't find a peer matching the passed counterparty node_id {}", counterparty_node_id), msg.channel_id)
7442 let mut peer_state_lock = peer_state_mutex.lock().unwrap();
7443 let peer_state = &mut *peer_state_lock;
7444 match peer_state.channel_by_id.entry(msg.channel_id) {
7445 hash_map::Entry::Occupied(mut chan_phase_entry) => {
7446 if let ChannelPhase::Funded(chan) = chan_phase_entry.get_mut() {
7447 let logger = WithChannelContext::from(&self.logger, &chan.context, None);
7448 let announcement_sigs_opt = try_chan_phase_entry!(self, chan.channel_ready(&msg, &self.node_signer,
7449 self.chain_hash, &self.default_configuration, &self.best_block.read().unwrap(), &&logger), chan_phase_entry);
7450 if let Some(announcement_sigs) = announcement_sigs_opt {
7451 log_trace!(logger, "Sending announcement_signatures for channel {}", chan.context.channel_id());
7452 peer_state.pending_msg_events.push(events::MessageSendEvent::SendAnnouncementSignatures {
7453 node_id: counterparty_node_id.clone(),
7454 msg: announcement_sigs,
7456 } else if chan.context.is_usable() {
7457 // If we're sending an announcement_signatures, we'll send the (public)
7458 // channel_update after sending a channel_announcement when we receive our
7459 // counterparty's announcement_signatures. Thus, we only bother to send a
7460 // channel_update here if the channel is not public, i.e. we're not sending an
7461 // announcement_signatures.
7462 log_trace!(logger, "Sending private initial channel_update for our counterparty on channel {}", chan.context.channel_id());
7463 if let Ok(msg) = self.get_channel_update_for_unicast(chan) {
7464 peer_state.pending_msg_events.push(events::MessageSendEvent::SendChannelUpdate {
7465 node_id: counterparty_node_id.clone(),
7472 let mut pending_events = self.pending_events.lock().unwrap();
7473 emit_channel_ready_event!(pending_events, chan);
7478 try_chan_phase_entry!(self, Err(ChannelError::Close(
7479 "Got a channel_ready message for an unfunded channel!".into())), chan_phase_entry)
7482 hash_map::Entry::Vacant(_) => {
7483 Err(MsgHandleErrInternal::send_err_msg_no_close(format!("Got a message for a channel from the wrong node! No such channel for the passed counterparty_node_id {}", counterparty_node_id), msg.channel_id))
7488 fn internal_shutdown(&self, counterparty_node_id: &PublicKey, msg: &msgs::Shutdown) -> Result<(), MsgHandleErrInternal> {
7489 let mut dropped_htlcs: Vec<(HTLCSource, PaymentHash)> = Vec::new();
7490 let mut finish_shutdown = None;
7492 let per_peer_state = self.per_peer_state.read().unwrap();
7493 let peer_state_mutex = per_peer_state.get(counterparty_node_id)
7495 debug_assert!(false);
7496 MsgHandleErrInternal::send_err_msg_no_close(format!("Can't find a peer matching the passed counterparty node_id {}", counterparty_node_id), msg.channel_id)
7498 let mut peer_state_lock = peer_state_mutex.lock().unwrap();
7499 let peer_state = &mut *peer_state_lock;
7500 if let hash_map::Entry::Occupied(mut chan_phase_entry) = peer_state.channel_by_id.entry(msg.channel_id.clone()) {
7501 let phase = chan_phase_entry.get_mut();
7503 ChannelPhase::Funded(chan) => {
7504 if !chan.received_shutdown() {
7505 let logger = WithChannelContext::from(&self.logger, &chan.context, None);
7506 log_info!(logger, "Received a shutdown message from our counterparty for channel {}{}.",
7508 if chan.sent_shutdown() { " after we initiated shutdown" } else { "" });
7511 let funding_txo_opt = chan.context.get_funding_txo();
7512 let (shutdown, monitor_update_opt, htlcs) = try_chan_phase_entry!(self,
7513 chan.shutdown(&self.signer_provider, &peer_state.latest_features, &msg), chan_phase_entry);
7514 dropped_htlcs = htlcs;
7516 if let Some(msg) = shutdown {
7517 // We can send the `shutdown` message before updating the `ChannelMonitor`
7518 // here as we don't need the monitor update to complete until we send a
7519 // `shutdown_signed`, which we'll delay if we're pending a monitor update.
7520 peer_state.pending_msg_events.push(events::MessageSendEvent::SendShutdown {
7521 node_id: *counterparty_node_id,
7525 // Update the monitor with the shutdown script if necessary.
7526 if let Some(monitor_update) = monitor_update_opt {
7527 handle_new_monitor_update!(self, funding_txo_opt.unwrap(), monitor_update,
7528 peer_state_lock, peer_state, per_peer_state, chan);
7531 ChannelPhase::UnfundedInboundV1(_) | ChannelPhase::UnfundedOutboundV1(_) => {
7532 let context = phase.context_mut();
7533 let logger = WithChannelContext::from(&self.logger, context, None);
7534 log_error!(logger, "Immediately closing unfunded channel {} as peer asked to cooperatively shut it down (which is unnecessary)", &msg.channel_id);
7535 let mut chan = remove_channel_phase!(self, chan_phase_entry);
7536 finish_shutdown = Some(chan.context_mut().force_shutdown(false, ClosureReason::CounterpartyCoopClosedUnfundedChannel));
7538 // TODO(dual_funding): Combine this match arm with above.
7539 #[cfg(any(dual_funding, splicing))]
7540 ChannelPhase::UnfundedInboundV2(_) | ChannelPhase::UnfundedOutboundV2(_) => {
7541 let context = phase.context_mut();
7542 log_error!(self.logger, "Immediately closing unfunded channel {} as peer asked to cooperatively shut it down (which is unnecessary)", &msg.channel_id);
7543 let mut chan = remove_channel_phase!(self, chan_phase_entry);
7544 finish_shutdown = Some(chan.context_mut().force_shutdown(false, ClosureReason::CounterpartyCoopClosedUnfundedChannel));
7548 return Err(MsgHandleErrInternal::send_err_msg_no_close(format!("Got a message for a channel from the wrong node! No such channel for the passed counterparty_node_id {}", counterparty_node_id), msg.channel_id))
7551 for htlc_source in dropped_htlcs.drain(..) {
7552 let receiver = HTLCDestination::NextHopChannel { node_id: Some(counterparty_node_id.clone()), channel_id: msg.channel_id };
7553 let reason = HTLCFailReason::from_failure_code(0x4000 | 8);
7554 self.fail_htlc_backwards_internal(&htlc_source.0, &htlc_source.1, &reason, receiver);
7556 if let Some(shutdown_res) = finish_shutdown {
7557 self.finish_close_channel(shutdown_res);
7563 fn internal_closing_signed(&self, counterparty_node_id: &PublicKey, msg: &msgs::ClosingSigned) -> Result<(), MsgHandleErrInternal> {
7564 let per_peer_state = self.per_peer_state.read().unwrap();
7565 let peer_state_mutex = per_peer_state.get(counterparty_node_id)
7567 debug_assert!(false);
7568 MsgHandleErrInternal::send_err_msg_no_close(format!("Can't find a peer matching the passed counterparty node_id {}", counterparty_node_id), msg.channel_id)
7570 let (tx, chan_option, shutdown_result) = {
7571 let mut peer_state_lock = peer_state_mutex.lock().unwrap();
7572 let peer_state = &mut *peer_state_lock;
7573 match peer_state.channel_by_id.entry(msg.channel_id.clone()) {
7574 hash_map::Entry::Occupied(mut chan_phase_entry) => {
7575 if let ChannelPhase::Funded(chan) = chan_phase_entry.get_mut() {
7576 let (closing_signed, tx, shutdown_result) = try_chan_phase_entry!(self, chan.closing_signed(&self.fee_estimator, &msg), chan_phase_entry);
7577 debug_assert_eq!(shutdown_result.is_some(), chan.is_shutdown());
7578 if let Some(msg) = closing_signed {
7579 peer_state.pending_msg_events.push(events::MessageSendEvent::SendClosingSigned {
7580 node_id: counterparty_node_id.clone(),
7585 // We're done with this channel, we've got a signed closing transaction and
7586 // will send the closing_signed back to the remote peer upon return. This
7587 // also implies there are no pending HTLCs left on the channel, so we can
7588 // fully delete it from tracking (the channel monitor is still around to
7589 // watch for old state broadcasts)!
7590 (tx, Some(remove_channel_phase!(self, chan_phase_entry)), shutdown_result)
7591 } else { (tx, None, shutdown_result) }
7593 return try_chan_phase_entry!(self, Err(ChannelError::Close(
7594 "Got a closing_signed message for an unfunded channel!".into())), chan_phase_entry);
7597 hash_map::Entry::Vacant(_) => return Err(MsgHandleErrInternal::send_err_msg_no_close(format!("Got a message for a channel from the wrong node! No such channel for the passed counterparty_node_id {}", counterparty_node_id), msg.channel_id))
7600 if let Some(broadcast_tx) = tx {
7601 let channel_id = chan_option.as_ref().map(|channel| channel.context().channel_id());
7602 log_info!(WithContext::from(&self.logger, Some(*counterparty_node_id), channel_id, None), "Broadcasting {}", log_tx!(broadcast_tx));
7603 self.tx_broadcaster.broadcast_transactions(&[&broadcast_tx]);
7605 if let Some(ChannelPhase::Funded(chan)) = chan_option {
7606 if let Ok(update) = self.get_channel_update_for_broadcast(&chan) {
7607 let mut pending_broadcast_messages = self.pending_broadcast_messages.lock().unwrap();
7608 pending_broadcast_messages.push(events::MessageSendEvent::BroadcastChannelUpdate {
7613 mem::drop(per_peer_state);
7614 if let Some(shutdown_result) = shutdown_result {
7615 self.finish_close_channel(shutdown_result);
7620 fn internal_update_add_htlc(&self, counterparty_node_id: &PublicKey, msg: &msgs::UpdateAddHTLC) -> Result<(), MsgHandleErrInternal> {
7621 //TODO: BOLT 4 points out a specific attack where a peer may re-send an onion packet and
7622 //determine the state of the payment based on our response/if we forward anything/the time
7623 //we take to respond. We should take care to avoid allowing such an attack.
7625 //TODO: There exists a further attack where a node may garble the onion data, forward it to
7626 //us repeatedly garbled in different ways, and compare our error messages, which are
7627 //encrypted with the same key. It's not immediately obvious how to usefully exploit that,
7628 //but we should prevent it anyway.
7630 // Note that the ChannelManager is NOT re-persisted on disk after this (unless we error
7631 // closing a channel), so any changes are likely to be lost on restart!
7633 let decoded_hop_res = self.decode_update_add_htlc_onion(msg, counterparty_node_id);
7634 let per_peer_state = self.per_peer_state.read().unwrap();
7635 let peer_state_mutex = per_peer_state.get(counterparty_node_id)
7637 debug_assert!(false);
7638 MsgHandleErrInternal::send_err_msg_no_close(format!("Can't find a peer matching the passed counterparty node_id {}", counterparty_node_id), msg.channel_id)
7640 let mut peer_state_lock = peer_state_mutex.lock().unwrap();
7641 let peer_state = &mut *peer_state_lock;
7642 match peer_state.channel_by_id.entry(msg.channel_id) {
7643 hash_map::Entry::Occupied(mut chan_phase_entry) => {
7644 if let ChannelPhase::Funded(chan) = chan_phase_entry.get_mut() {
7645 let mut pending_forward_info = match decoded_hop_res {
7646 Ok((next_hop, shared_secret, next_packet_pk_opt)) =>
7647 self.construct_pending_htlc_status(
7648 msg, counterparty_node_id, shared_secret, next_hop,
7649 chan.context.config().accept_underpaying_htlcs, next_packet_pk_opt,
7651 Err(e) => PendingHTLCStatus::Fail(e)
7653 let logger = WithChannelContext::from(&self.logger, &chan.context, Some(msg.payment_hash));
7654 // If the update_add is completely bogus, the call will Err and we will close,
7655 // but if we've sent a shutdown and they haven't acknowledged it yet, we just
7656 // want to reject the new HTLC and fail it backwards instead of forwarding.
7657 if let Err((_, error_code)) = chan.can_accept_incoming_htlc(&msg, &self.fee_estimator, &logger) {
7658 if msg.blinding_point.is_some() {
7659 pending_forward_info = PendingHTLCStatus::Fail(HTLCFailureMsg::Malformed(
7660 msgs::UpdateFailMalformedHTLC {
7661 channel_id: msg.channel_id,
7662 htlc_id: msg.htlc_id,
7663 sha256_of_onion: [0; 32],
7664 failure_code: INVALID_ONION_BLINDING,
7668 match pending_forward_info {
7669 PendingHTLCStatus::Forward(PendingHTLCInfo {
7670 ref incoming_shared_secret, ref routing, ..
7672 let reason = if routing.blinded_failure().is_some() {
7673 HTLCFailReason::reason(INVALID_ONION_BLINDING, vec![0; 32])
7674 } else if (error_code & 0x1000) != 0 {
7675 let (real_code, error_data) = self.get_htlc_inbound_temp_fail_err_and_data(error_code, chan);
7676 HTLCFailReason::reason(real_code, error_data)
7678 HTLCFailReason::from_failure_code(error_code)
7679 }.get_encrypted_failure_packet(incoming_shared_secret, &None);
7680 let msg = msgs::UpdateFailHTLC {
7681 channel_id: msg.channel_id,
7682 htlc_id: msg.htlc_id,
7685 pending_forward_info = PendingHTLCStatus::Fail(HTLCFailureMsg::Relay(msg));
7691 try_chan_phase_entry!(self, chan.update_add_htlc(&msg, pending_forward_info, &self.fee_estimator), chan_phase_entry);
7693 return try_chan_phase_entry!(self, Err(ChannelError::Close(
7694 "Got an update_add_htlc message for an unfunded channel!".into())), chan_phase_entry);
7697 hash_map::Entry::Vacant(_) => return Err(MsgHandleErrInternal::send_err_msg_no_close(format!("Got a message for a channel from the wrong node! No such channel for the passed counterparty_node_id {}", counterparty_node_id), msg.channel_id))
7702 fn internal_update_fulfill_htlc(&self, counterparty_node_id: &PublicKey, msg: &msgs::UpdateFulfillHTLC) -> Result<(), MsgHandleErrInternal> {
7704 let next_user_channel_id;
7705 let (htlc_source, forwarded_htlc_value, skimmed_fee_msat) = {
7706 let per_peer_state = self.per_peer_state.read().unwrap();
7707 let peer_state_mutex = per_peer_state.get(counterparty_node_id)
7709 debug_assert!(false);
7710 MsgHandleErrInternal::send_err_msg_no_close(format!("Can't find a peer matching the passed counterparty node_id {}", counterparty_node_id), msg.channel_id)
7712 let mut peer_state_lock = peer_state_mutex.lock().unwrap();
7713 let peer_state = &mut *peer_state_lock;
7714 match peer_state.channel_by_id.entry(msg.channel_id) {
7715 hash_map::Entry::Occupied(mut chan_phase_entry) => {
7716 if let ChannelPhase::Funded(chan) = chan_phase_entry.get_mut() {
7717 let res = try_chan_phase_entry!(self, chan.update_fulfill_htlc(&msg), chan_phase_entry);
7718 if let HTLCSource::PreviousHopData(prev_hop) = &res.0 {
7719 let logger = WithChannelContext::from(&self.logger, &chan.context, None);
7721 "Holding the next revoke_and_ack from {} until the preimage is durably persisted in the inbound edge's ChannelMonitor",
7723 peer_state.actions_blocking_raa_monitor_updates.entry(msg.channel_id)
7724 .or_insert_with(Vec::new)
7725 .push(RAAMonitorUpdateBlockingAction::from_prev_hop_data(&prev_hop));
7727 // Note that we do not need to push an `actions_blocking_raa_monitor_updates`
7728 // entry here, even though we *do* need to block the next RAA monitor update.
7729 // We do this instead in the `claim_funds_internal` by attaching a
7730 // `ReleaseRAAChannelMonitorUpdate` action to the event generated when the
7731 // outbound HTLC is claimed. This is guaranteed to all complete before we
7732 // process the RAA as messages are processed from single peers serially.
7733 funding_txo = chan.context.get_funding_txo().expect("We won't accept a fulfill until funded");
7734 next_user_channel_id = chan.context.get_user_id();
7737 return try_chan_phase_entry!(self, Err(ChannelError::Close(
7738 "Got an update_fulfill_htlc message for an unfunded channel!".into())), chan_phase_entry);
7741 hash_map::Entry::Vacant(_) => return Err(MsgHandleErrInternal::send_err_msg_no_close(format!("Got a message for a channel from the wrong node! No such channel for the passed counterparty_node_id {}", counterparty_node_id), msg.channel_id))
7744 self.claim_funds_internal(htlc_source, msg.payment_preimage.clone(),
7745 Some(forwarded_htlc_value), skimmed_fee_msat, false, false, Some(*counterparty_node_id),
7746 funding_txo, msg.channel_id, Some(next_user_channel_id),
7752 fn internal_update_fail_htlc(&self, counterparty_node_id: &PublicKey, msg: &msgs::UpdateFailHTLC) -> Result<(), MsgHandleErrInternal> {
7753 // Note that the ChannelManager is NOT re-persisted on disk after this (unless we error
7754 // closing a channel), so any changes are likely to be lost on restart!
7755 let per_peer_state = self.per_peer_state.read().unwrap();
7756 let peer_state_mutex = per_peer_state.get(counterparty_node_id)
7758 debug_assert!(false);
7759 MsgHandleErrInternal::send_err_msg_no_close(format!("Can't find a peer matching the passed counterparty node_id {}", counterparty_node_id), msg.channel_id)
7761 let mut peer_state_lock = peer_state_mutex.lock().unwrap();
7762 let peer_state = &mut *peer_state_lock;
7763 match peer_state.channel_by_id.entry(msg.channel_id) {
7764 hash_map::Entry::Occupied(mut chan_phase_entry) => {
7765 if let ChannelPhase::Funded(chan) = chan_phase_entry.get_mut() {
7766 try_chan_phase_entry!(self, chan.update_fail_htlc(&msg, HTLCFailReason::from_msg(msg)), chan_phase_entry);
7768 return try_chan_phase_entry!(self, Err(ChannelError::Close(
7769 "Got an update_fail_htlc message for an unfunded channel!".into())), chan_phase_entry);
7772 hash_map::Entry::Vacant(_) => return Err(MsgHandleErrInternal::send_err_msg_no_close(format!("Got a message for a channel from the wrong node! No such channel for the passed counterparty_node_id {}", counterparty_node_id), msg.channel_id))
7777 fn internal_update_fail_malformed_htlc(&self, counterparty_node_id: &PublicKey, msg: &msgs::UpdateFailMalformedHTLC) -> Result<(), MsgHandleErrInternal> {
7778 // Note that the ChannelManager is NOT re-persisted on disk after this (unless we error
7779 // closing a channel), so any changes are likely to be lost on restart!
7780 let per_peer_state = self.per_peer_state.read().unwrap();
7781 let peer_state_mutex = per_peer_state.get(counterparty_node_id)
7783 debug_assert!(false);
7784 MsgHandleErrInternal::send_err_msg_no_close(format!("Can't find a peer matching the passed counterparty node_id {}", counterparty_node_id), msg.channel_id)
7786 let mut peer_state_lock = peer_state_mutex.lock().unwrap();
7787 let peer_state = &mut *peer_state_lock;
7788 match peer_state.channel_by_id.entry(msg.channel_id) {
7789 hash_map::Entry::Occupied(mut chan_phase_entry) => {
7790 if (msg.failure_code & 0x8000) == 0 {
7791 let chan_err: ChannelError = ChannelError::Close("Got update_fail_malformed_htlc with BADONION not set".to_owned());
7792 try_chan_phase_entry!(self, Err(chan_err), chan_phase_entry);
7794 if let ChannelPhase::Funded(chan) = chan_phase_entry.get_mut() {
7795 try_chan_phase_entry!(self, chan.update_fail_malformed_htlc(&msg, HTLCFailReason::reason(msg.failure_code, msg.sha256_of_onion.to_vec())), chan_phase_entry);
7797 return try_chan_phase_entry!(self, Err(ChannelError::Close(
7798 "Got an update_fail_malformed_htlc message for an unfunded channel!".into())), chan_phase_entry);
7802 hash_map::Entry::Vacant(_) => return Err(MsgHandleErrInternal::send_err_msg_no_close(format!("Got a message for a channel from the wrong node! No such channel for the passed counterparty_node_id {}", counterparty_node_id), msg.channel_id))
7806 fn internal_commitment_signed(&self, counterparty_node_id: &PublicKey, msg: &msgs::CommitmentSigned) -> Result<(), MsgHandleErrInternal> {
7807 let per_peer_state = self.per_peer_state.read().unwrap();
7808 let peer_state_mutex = per_peer_state.get(counterparty_node_id)
7810 debug_assert!(false);
7811 MsgHandleErrInternal::send_err_msg_no_close(format!("Can't find a peer matching the passed counterparty node_id {}", counterparty_node_id), msg.channel_id)
7813 let mut peer_state_lock = peer_state_mutex.lock().unwrap();
7814 let peer_state = &mut *peer_state_lock;
7815 match peer_state.channel_by_id.entry(msg.channel_id) {
7816 hash_map::Entry::Occupied(mut chan_phase_entry) => {
7817 if let ChannelPhase::Funded(chan) = chan_phase_entry.get_mut() {
7818 let logger = WithChannelContext::from(&self.logger, &chan.context, None);
7819 let funding_txo = chan.context.get_funding_txo();
7820 let monitor_update_opt = try_chan_phase_entry!(self, chan.commitment_signed(&msg, &&logger), chan_phase_entry);
7821 if let Some(monitor_update) = monitor_update_opt {
7822 handle_new_monitor_update!(self, funding_txo.unwrap(), monitor_update, peer_state_lock,
7823 peer_state, per_peer_state, chan);
7827 return try_chan_phase_entry!(self, Err(ChannelError::Close(
7828 "Got a commitment_signed message for an unfunded channel!".into())), chan_phase_entry);
7831 hash_map::Entry::Vacant(_) => return Err(MsgHandleErrInternal::send_err_msg_no_close(format!("Got a message for a channel from the wrong node! No such channel for the passed counterparty_node_id {}", counterparty_node_id), msg.channel_id))
7835 fn push_decode_update_add_htlcs(&self, mut update_add_htlcs: (u64, Vec<msgs::UpdateAddHTLC>)) {
7836 let mut push_forward_event = self.forward_htlcs.lock().unwrap().is_empty();
7837 let mut decode_update_add_htlcs = self.decode_update_add_htlcs.lock().unwrap();
7838 push_forward_event &= decode_update_add_htlcs.is_empty();
7839 let scid = update_add_htlcs.0;
7840 match decode_update_add_htlcs.entry(scid) {
7841 hash_map::Entry::Occupied(mut e) => { e.get_mut().append(&mut update_add_htlcs.1); },
7842 hash_map::Entry::Vacant(e) => { e.insert(update_add_htlcs.1); },
7844 if push_forward_event { self.push_pending_forwards_ev(); }
7848 fn forward_htlcs(&self, per_source_pending_forwards: &mut [(u64, OutPoint, ChannelId, u128, Vec<(PendingHTLCInfo, u64)>)]) {
7849 let push_forward_event = self.forward_htlcs_without_forward_event(per_source_pending_forwards);
7850 if push_forward_event { self.push_pending_forwards_ev() }
7854 fn forward_htlcs_without_forward_event(&self, per_source_pending_forwards: &mut [(u64, OutPoint, ChannelId, u128, Vec<(PendingHTLCInfo, u64)>)]) -> bool {
7855 let mut push_forward_event = false;
7856 for &mut (prev_short_channel_id, prev_funding_outpoint, prev_channel_id, prev_user_channel_id, ref mut pending_forwards) in per_source_pending_forwards {
7857 let mut new_intercept_events = VecDeque::new();
7858 let mut failed_intercept_forwards = Vec::new();
7859 if !pending_forwards.is_empty() {
7860 for (forward_info, prev_htlc_id) in pending_forwards.drain(..) {
7861 let scid = match forward_info.routing {
7862 PendingHTLCRouting::Forward { short_channel_id, .. } => short_channel_id,
7863 PendingHTLCRouting::Receive { .. } => 0,
7864 PendingHTLCRouting::ReceiveKeysend { .. } => 0,
7866 // Pull this now to avoid introducing a lock order with `forward_htlcs`.
7867 let is_our_scid = self.short_to_chan_info.read().unwrap().contains_key(&scid);
7869 let decode_update_add_htlcs_empty = self.decode_update_add_htlcs.lock().unwrap().is_empty();
7870 let mut forward_htlcs = self.forward_htlcs.lock().unwrap();
7871 let forward_htlcs_empty = forward_htlcs.is_empty();
7872 match forward_htlcs.entry(scid) {
7873 hash_map::Entry::Occupied(mut entry) => {
7874 entry.get_mut().push(HTLCForwardInfo::AddHTLC(PendingAddHTLCInfo {
7875 prev_short_channel_id, prev_funding_outpoint, prev_channel_id, prev_htlc_id, prev_user_channel_id, forward_info }));
7877 hash_map::Entry::Vacant(entry) => {
7878 if !is_our_scid && forward_info.incoming_amt_msat.is_some() &&
7879 fake_scid::is_valid_intercept(&self.fake_scid_rand_bytes, scid, &self.chain_hash)
7881 let intercept_id = InterceptId(Sha256::hash(&forward_info.incoming_shared_secret).to_byte_array());
7882 let mut pending_intercepts = self.pending_intercepted_htlcs.lock().unwrap();
7883 match pending_intercepts.entry(intercept_id) {
7884 hash_map::Entry::Vacant(entry) => {
7885 new_intercept_events.push_back((events::Event::HTLCIntercepted {
7886 requested_next_hop_scid: scid,
7887 payment_hash: forward_info.payment_hash,
7888 inbound_amount_msat: forward_info.incoming_amt_msat.unwrap(),
7889 expected_outbound_amount_msat: forward_info.outgoing_amt_msat,
7892 entry.insert(PendingAddHTLCInfo {
7893 prev_short_channel_id, prev_funding_outpoint, prev_channel_id, prev_htlc_id, prev_user_channel_id, forward_info });
7895 hash_map::Entry::Occupied(_) => {
7896 let logger = WithContext::from(&self.logger, None, Some(prev_channel_id), Some(forward_info.payment_hash));
7897 log_info!(logger, "Failed to forward incoming HTLC: detected duplicate intercepted payment over short channel id {}", scid);
7898 let htlc_source = HTLCSource::PreviousHopData(HTLCPreviousHopData {
7899 short_channel_id: prev_short_channel_id,
7900 user_channel_id: Some(prev_user_channel_id),
7901 outpoint: prev_funding_outpoint,
7902 channel_id: prev_channel_id,
7903 htlc_id: prev_htlc_id,
7904 incoming_packet_shared_secret: forward_info.incoming_shared_secret,
7905 phantom_shared_secret: None,
7906 blinded_failure: forward_info.routing.blinded_failure(),
7909 failed_intercept_forwards.push((htlc_source, forward_info.payment_hash,
7910 HTLCFailReason::from_failure_code(0x4000 | 10),
7911 HTLCDestination::InvalidForward { requested_forward_scid: scid },
7916 // We don't want to generate a PendingHTLCsForwardable event if only intercepted
7917 // payments are being processed.
7918 push_forward_event |= forward_htlcs_empty && decode_update_add_htlcs_empty;
7919 entry.insert(vec!(HTLCForwardInfo::AddHTLC(PendingAddHTLCInfo {
7920 prev_short_channel_id, prev_funding_outpoint, prev_channel_id, prev_htlc_id, prev_user_channel_id, forward_info })));
7927 for (htlc_source, payment_hash, failure_reason, destination) in failed_intercept_forwards.drain(..) {
7928 push_forward_event |= self.fail_htlc_backwards_internal_without_forward_event(&htlc_source, &payment_hash, &failure_reason, destination);
7931 if !new_intercept_events.is_empty() {
7932 let mut events = self.pending_events.lock().unwrap();
7933 events.append(&mut new_intercept_events);
7939 fn push_pending_forwards_ev(&self) {
7940 let mut pending_events = self.pending_events.lock().unwrap();
7941 let is_processing_events = self.pending_events_processor.load(Ordering::Acquire);
7942 let num_forward_events = pending_events.iter().filter(|(ev, _)|
7943 if let events::Event::PendingHTLCsForwardable { .. } = ev { true } else { false }
7945 // We only want to push a PendingHTLCsForwardable event if no others are queued. Processing
7946 // events is done in batches and they are not removed until we're done processing each
7947 // batch. Since handling a `PendingHTLCsForwardable` event will call back into the
7948 // `ChannelManager`, we'll still see the original forwarding event not removed. Phantom
7949 // payments will need an additional forwarding event before being claimed to make them look
7950 // real by taking more time.
7951 if (is_processing_events && num_forward_events <= 1) || num_forward_events < 1 {
7952 pending_events.push_back((Event::PendingHTLCsForwardable {
7953 time_forwardable: Duration::from_millis(MIN_HTLC_RELAY_HOLDING_CELL_MILLIS),
7958 /// Checks whether [`ChannelMonitorUpdate`]s generated by the receipt of a remote
7959 /// [`msgs::RevokeAndACK`] should be held for the given channel until some other action
7960 /// completes. Note that this needs to happen in the same [`PeerState`] mutex as any release of
7961 /// the [`ChannelMonitorUpdate`] in question.
7962 fn raa_monitor_updates_held(&self,
7963 actions_blocking_raa_monitor_updates: &BTreeMap<ChannelId, Vec<RAAMonitorUpdateBlockingAction>>,
7964 channel_funding_outpoint: OutPoint, channel_id: ChannelId, counterparty_node_id: PublicKey
7966 actions_blocking_raa_monitor_updates
7967 .get(&channel_id).map(|v| !v.is_empty()).unwrap_or(false)
7968 || self.pending_events.lock().unwrap().iter().any(|(_, action)| {
7969 action == &Some(EventCompletionAction::ReleaseRAAChannelMonitorUpdate {
7970 channel_funding_outpoint,
7972 counterparty_node_id,
7977 #[cfg(any(test, feature = "_test_utils"))]
7978 pub(crate) fn test_raa_monitor_updates_held(&self,
7979 counterparty_node_id: PublicKey, channel_id: ChannelId
7981 let per_peer_state = self.per_peer_state.read().unwrap();
7982 if let Some(peer_state_mtx) = per_peer_state.get(&counterparty_node_id) {
7983 let mut peer_state_lck = peer_state_mtx.lock().unwrap();
7984 let peer_state = &mut *peer_state_lck;
7986 if let Some(chan) = peer_state.channel_by_id.get(&channel_id) {
7987 return self.raa_monitor_updates_held(&peer_state.actions_blocking_raa_monitor_updates,
7988 chan.context().get_funding_txo().unwrap(), channel_id, counterparty_node_id);
7994 fn internal_revoke_and_ack(&self, counterparty_node_id: &PublicKey, msg: &msgs::RevokeAndACK) -> Result<(), MsgHandleErrInternal> {
7995 let htlcs_to_fail = {
7996 let per_peer_state = self.per_peer_state.read().unwrap();
7997 let mut peer_state_lock = per_peer_state.get(counterparty_node_id)
7999 debug_assert!(false);
8000 MsgHandleErrInternal::send_err_msg_no_close(format!("Can't find a peer matching the passed counterparty node_id {}", counterparty_node_id), msg.channel_id)
8001 }).map(|mtx| mtx.lock().unwrap())?;
8002 let peer_state = &mut *peer_state_lock;
8003 match peer_state.channel_by_id.entry(msg.channel_id) {
8004 hash_map::Entry::Occupied(mut chan_phase_entry) => {
8005 if let ChannelPhase::Funded(chan) = chan_phase_entry.get_mut() {
8006 let logger = WithChannelContext::from(&self.logger, &chan.context, None);
8007 let funding_txo_opt = chan.context.get_funding_txo();
8008 let mon_update_blocked = if let Some(funding_txo) = funding_txo_opt {
8009 self.raa_monitor_updates_held(
8010 &peer_state.actions_blocking_raa_monitor_updates, funding_txo, msg.channel_id,
8011 *counterparty_node_id)
8013 let (htlcs_to_fail, monitor_update_opt) = try_chan_phase_entry!(self,
8014 chan.revoke_and_ack(&msg, &self.fee_estimator, &&logger, mon_update_blocked), chan_phase_entry);
8015 if let Some(monitor_update) = monitor_update_opt {
8016 let funding_txo = funding_txo_opt
8017 .expect("Funding outpoint must have been set for RAA handling to succeed");
8018 handle_new_monitor_update!(self, funding_txo, monitor_update,
8019 peer_state_lock, peer_state, per_peer_state, chan);
8023 return try_chan_phase_entry!(self, Err(ChannelError::Close(
8024 "Got a revoke_and_ack message for an unfunded channel!".into())), chan_phase_entry);
8027 hash_map::Entry::Vacant(_) => return Err(MsgHandleErrInternal::send_err_msg_no_close(format!("Got a message for a channel from the wrong node! No such channel for the passed counterparty_node_id {}", counterparty_node_id), msg.channel_id))
8030 self.fail_holding_cell_htlcs(htlcs_to_fail, msg.channel_id, counterparty_node_id);
8034 fn internal_update_fee(&self, counterparty_node_id: &PublicKey, msg: &msgs::UpdateFee) -> Result<(), MsgHandleErrInternal> {
8035 let per_peer_state = self.per_peer_state.read().unwrap();
8036 let peer_state_mutex = per_peer_state.get(counterparty_node_id)
8038 debug_assert!(false);
8039 MsgHandleErrInternal::send_err_msg_no_close(format!("Can't find a peer matching the passed counterparty node_id {}", counterparty_node_id), msg.channel_id)
8041 let mut peer_state_lock = peer_state_mutex.lock().unwrap();
8042 let peer_state = &mut *peer_state_lock;
8043 match peer_state.channel_by_id.entry(msg.channel_id) {
8044 hash_map::Entry::Occupied(mut chan_phase_entry) => {
8045 if let ChannelPhase::Funded(chan) = chan_phase_entry.get_mut() {
8046 let logger = WithChannelContext::from(&self.logger, &chan.context, None);
8047 try_chan_phase_entry!(self, chan.update_fee(&self.fee_estimator, &msg, &&logger), chan_phase_entry);
8049 return try_chan_phase_entry!(self, Err(ChannelError::Close(
8050 "Got an update_fee message for an unfunded channel!".into())), chan_phase_entry);
8053 hash_map::Entry::Vacant(_) => return Err(MsgHandleErrInternal::send_err_msg_no_close(format!("Got a message for a channel from the wrong node! No such channel for the passed counterparty_node_id {}", counterparty_node_id), msg.channel_id))
8058 fn internal_announcement_signatures(&self, counterparty_node_id: &PublicKey, msg: &msgs::AnnouncementSignatures) -> Result<(), MsgHandleErrInternal> {
8059 let per_peer_state = self.per_peer_state.read().unwrap();
8060 let peer_state_mutex = per_peer_state.get(counterparty_node_id)
8062 debug_assert!(false);
8063 MsgHandleErrInternal::send_err_msg_no_close(format!("Can't find a peer matching the passed counterparty node_id {}", counterparty_node_id), msg.channel_id)
8065 let mut peer_state_lock = peer_state_mutex.lock().unwrap();
8066 let peer_state = &mut *peer_state_lock;
8067 match peer_state.channel_by_id.entry(msg.channel_id) {
8068 hash_map::Entry::Occupied(mut chan_phase_entry) => {
8069 if let ChannelPhase::Funded(chan) = chan_phase_entry.get_mut() {
8070 if !chan.context.is_usable() {
8071 return Err(MsgHandleErrInternal::from_no_close(LightningError{err: "Got an announcement_signatures before we were ready for it".to_owned(), action: msgs::ErrorAction::IgnoreError}));
8074 peer_state.pending_msg_events.push(events::MessageSendEvent::BroadcastChannelAnnouncement {
8075 msg: try_chan_phase_entry!(self, chan.announcement_signatures(
8076 &self.node_signer, self.chain_hash, self.best_block.read().unwrap().height,
8077 msg, &self.default_configuration
8078 ), chan_phase_entry),
8079 // Note that announcement_signatures fails if the channel cannot be announced,
8080 // so get_channel_update_for_broadcast will never fail by the time we get here.
8081 update_msg: Some(self.get_channel_update_for_broadcast(chan).unwrap()),
8084 return try_chan_phase_entry!(self, Err(ChannelError::Close(
8085 "Got an announcement_signatures message for an unfunded channel!".into())), chan_phase_entry);
8088 hash_map::Entry::Vacant(_) => return Err(MsgHandleErrInternal::send_err_msg_no_close(format!("Got a message for a channel from the wrong node! No such channel for the passed counterparty_node_id {}", counterparty_node_id), msg.channel_id))
8093 /// Returns DoPersist if anything changed, otherwise either SkipPersistNoEvents or an Err.
8094 fn internal_channel_update(&self, counterparty_node_id: &PublicKey, msg: &msgs::ChannelUpdate) -> Result<NotifyOption, MsgHandleErrInternal> {
8095 let (chan_counterparty_node_id, chan_id) = match self.short_to_chan_info.read().unwrap().get(&msg.contents.short_channel_id) {
8096 Some((cp_id, chan_id)) => (cp_id.clone(), chan_id.clone()),
8098 // It's not a local channel
8099 return Ok(NotifyOption::SkipPersistNoEvents)
8102 let per_peer_state = self.per_peer_state.read().unwrap();
8103 let peer_state_mutex_opt = per_peer_state.get(&chan_counterparty_node_id);
8104 if peer_state_mutex_opt.is_none() {
8105 return Ok(NotifyOption::SkipPersistNoEvents)
8107 let mut peer_state_lock = peer_state_mutex_opt.unwrap().lock().unwrap();
8108 let peer_state = &mut *peer_state_lock;
8109 match peer_state.channel_by_id.entry(chan_id) {
8110 hash_map::Entry::Occupied(mut chan_phase_entry) => {
8111 if let ChannelPhase::Funded(chan) = chan_phase_entry.get_mut() {
8112 if chan.context.get_counterparty_node_id() != *counterparty_node_id {
8113 if chan.context.should_announce() {
8114 // If the announcement is about a channel of ours which is public, some
8115 // other peer may simply be forwarding all its gossip to us. Don't provide
8116 // a scary-looking error message and return Ok instead.
8117 return Ok(NotifyOption::SkipPersistNoEvents);
8119 return Err(MsgHandleErrInternal::send_err_msg_no_close("Got a channel_update for a channel from the wrong node - it shouldn't know about our private channels!".to_owned(), chan_id));
8121 let were_node_one = self.get_our_node_id().serialize()[..] < chan.context.get_counterparty_node_id().serialize()[..];
8122 let msg_from_node_one = msg.contents.flags & 1 == 0;
8123 if were_node_one == msg_from_node_one {
8124 return Ok(NotifyOption::SkipPersistNoEvents);
8126 let logger = WithChannelContext::from(&self.logger, &chan.context, None);
8127 log_debug!(logger, "Received channel_update {:?} for channel {}.", msg, chan_id);
8128 let did_change = try_chan_phase_entry!(self, chan.channel_update(&msg), chan_phase_entry);
8129 // If nothing changed after applying their update, we don't need to bother
8132 return Ok(NotifyOption::SkipPersistNoEvents);
8136 return try_chan_phase_entry!(self, Err(ChannelError::Close(
8137 "Got a channel_update for an unfunded channel!".into())), chan_phase_entry);
8140 hash_map::Entry::Vacant(_) => return Ok(NotifyOption::SkipPersistNoEvents)
8142 Ok(NotifyOption::DoPersist)
8145 fn internal_channel_reestablish(&self, counterparty_node_id: &PublicKey, msg: &msgs::ChannelReestablish) -> Result<NotifyOption, MsgHandleErrInternal> {
8146 let need_lnd_workaround = {
8147 let per_peer_state = self.per_peer_state.read().unwrap();
8149 let peer_state_mutex = per_peer_state.get(counterparty_node_id)
8151 debug_assert!(false);
8152 MsgHandleErrInternal::send_err_msg_no_close(
8153 format!("Can't find a peer matching the passed counterparty node_id {}", counterparty_node_id),
8157 let logger = WithContext::from(&self.logger, Some(*counterparty_node_id), Some(msg.channel_id), None);
8158 let mut peer_state_lock = peer_state_mutex.lock().unwrap();
8159 let peer_state = &mut *peer_state_lock;
8160 match peer_state.channel_by_id.entry(msg.channel_id) {
8161 hash_map::Entry::Occupied(mut chan_phase_entry) => {
8162 if let ChannelPhase::Funded(chan) = chan_phase_entry.get_mut() {
8163 // Currently, we expect all holding cell update_adds to be dropped on peer
8164 // disconnect, so Channel's reestablish will never hand us any holding cell
8165 // freed HTLCs to fail backwards. If in the future we no longer drop pending
8166 // add-HTLCs on disconnect, we may be handed HTLCs to fail backwards here.
8167 let responses = try_chan_phase_entry!(self, chan.channel_reestablish(
8168 msg, &&logger, &self.node_signer, self.chain_hash,
8169 &self.default_configuration, &*self.best_block.read().unwrap()), chan_phase_entry);
8170 let mut channel_update = None;
8171 if let Some(msg) = responses.shutdown_msg {
8172 peer_state.pending_msg_events.push(events::MessageSendEvent::SendShutdown {
8173 node_id: counterparty_node_id.clone(),
8176 } else if chan.context.is_usable() {
8177 // If the channel is in a usable state (ie the channel is not being shut
8178 // down), send a unicast channel_update to our counterparty to make sure
8179 // they have the latest channel parameters.
8180 if let Ok(msg) = self.get_channel_update_for_unicast(chan) {
8181 channel_update = Some(events::MessageSendEvent::SendChannelUpdate {
8182 node_id: chan.context.get_counterparty_node_id(),
8187 let need_lnd_workaround = chan.context.workaround_lnd_bug_4006.take();
8188 let (htlc_forwards, decode_update_add_htlcs) = self.handle_channel_resumption(
8189 &mut peer_state.pending_msg_events, chan, responses.raa, responses.commitment_update, responses.order,
8190 Vec::new(), Vec::new(), None, responses.channel_ready, responses.announcement_sigs);
8191 debug_assert!(htlc_forwards.is_none());
8192 debug_assert!(decode_update_add_htlcs.is_none());
8193 if let Some(upd) = channel_update {
8194 peer_state.pending_msg_events.push(upd);
8198 return try_chan_phase_entry!(self, Err(ChannelError::Close(
8199 "Got a channel_reestablish message for an unfunded channel!".into())), chan_phase_entry);
8202 hash_map::Entry::Vacant(_) => {
8203 log_debug!(logger, "Sending bogus ChannelReestablish for unknown channel {} to force channel closure",
8205 // Unfortunately, lnd doesn't force close on errors
8206 // (https://github.com/lightningnetwork/lnd/blob/abb1e3463f3a83bbb843d5c399869dbe930ad94f/htlcswitch/link.go#L2119).
8207 // One of the few ways to get an lnd counterparty to force close is by
8208 // replicating what they do when restoring static channel backups (SCBs). They
8209 // send an invalid `ChannelReestablish` with `0` commitment numbers and an
8210 // invalid `your_last_per_commitment_secret`.
8212 // Since we received a `ChannelReestablish` for a channel that doesn't exist, we
8213 // can assume it's likely the channel closed from our point of view, but it
8214 // remains open on the counterparty's side. By sending this bogus
8215 // `ChannelReestablish` message now as a response to theirs, we trigger them to
8216 // force close broadcasting their latest state. If the closing transaction from
8217 // our point of view remains unconfirmed, it'll enter a race with the
8218 // counterparty's to-be-broadcast latest commitment transaction.
8219 peer_state.pending_msg_events.push(MessageSendEvent::SendChannelReestablish {
8220 node_id: *counterparty_node_id,
8221 msg: msgs::ChannelReestablish {
8222 channel_id: msg.channel_id,
8223 next_local_commitment_number: 0,
8224 next_remote_commitment_number: 0,
8225 your_last_per_commitment_secret: [1u8; 32],
8226 my_current_per_commitment_point: PublicKey::from_slice(&[2u8; 33]).unwrap(),
8227 next_funding_txid: None,
8230 return Err(MsgHandleErrInternal::send_err_msg_no_close(
8231 format!("Got a message for a channel from the wrong node! No such channel for the passed counterparty_node_id {}",
8232 counterparty_node_id), msg.channel_id)
8238 if let Some(channel_ready_msg) = need_lnd_workaround {
8239 self.internal_channel_ready(counterparty_node_id, &channel_ready_msg)?;
8241 Ok(NotifyOption::SkipPersistHandleEvents)
8244 /// Process pending events from the [`chain::Watch`], returning whether any events were processed.
8245 fn process_pending_monitor_events(&self) -> bool {
8246 debug_assert!(self.total_consistency_lock.try_write().is_err()); // Caller holds read lock
8248 let mut failed_channels = Vec::new();
8249 let mut pending_monitor_events = self.chain_monitor.release_pending_monitor_events();
8250 let has_pending_monitor_events = !pending_monitor_events.is_empty();
8251 for (funding_outpoint, channel_id, mut monitor_events, counterparty_node_id) in pending_monitor_events.drain(..) {
8252 for monitor_event in monitor_events.drain(..) {
8253 match monitor_event {
8254 MonitorEvent::HTLCEvent(htlc_update) => {
8255 let logger = WithContext::from(&self.logger, counterparty_node_id, Some(channel_id), Some(htlc_update.payment_hash));
8256 if let Some(preimage) = htlc_update.payment_preimage {
8257 log_trace!(logger, "Claiming HTLC with preimage {} from our monitor", preimage);
8258 self.claim_funds_internal(htlc_update.source, preimage,
8259 htlc_update.htlc_value_satoshis.map(|v| v * 1000), None, true,
8260 false, counterparty_node_id, funding_outpoint, channel_id, None);
8262 log_trace!(logger, "Failing HTLC with hash {} from our monitor", &htlc_update.payment_hash);
8263 let receiver = HTLCDestination::NextHopChannel { node_id: counterparty_node_id, channel_id };
8264 let reason = HTLCFailReason::from_failure_code(0x4000 | 8);
8265 self.fail_htlc_backwards_internal(&htlc_update.source, &htlc_update.payment_hash, &reason, receiver);
8268 MonitorEvent::HolderForceClosed(_) | MonitorEvent::HolderForceClosedWithInfo { .. } => {
8269 let counterparty_node_id_opt = match counterparty_node_id {
8270 Some(cp_id) => Some(cp_id),
8272 // TODO: Once we can rely on the counterparty_node_id from the
8273 // monitor event, this and the outpoint_to_peer map should be removed.
8274 let outpoint_to_peer = self.outpoint_to_peer.lock().unwrap();
8275 outpoint_to_peer.get(&funding_outpoint).cloned()
8278 if let Some(counterparty_node_id) = counterparty_node_id_opt {
8279 let per_peer_state = self.per_peer_state.read().unwrap();
8280 if let Some(peer_state_mutex) = per_peer_state.get(&counterparty_node_id) {
8281 let mut peer_state_lock = peer_state_mutex.lock().unwrap();
8282 let peer_state = &mut *peer_state_lock;
8283 let pending_msg_events = &mut peer_state.pending_msg_events;
8284 if let hash_map::Entry::Occupied(chan_phase_entry) = peer_state.channel_by_id.entry(channel_id) {
8285 if let ChannelPhase::Funded(mut chan) = remove_channel_phase!(self, chan_phase_entry) {
8286 let reason = if let MonitorEvent::HolderForceClosedWithInfo { reason, .. } = monitor_event {
8289 ClosureReason::HolderForceClosed
8291 failed_channels.push(chan.context.force_shutdown(false, reason.clone()));
8292 if let Ok(update) = self.get_channel_update_for_broadcast(&chan) {
8293 let mut pending_broadcast_messages = self.pending_broadcast_messages.lock().unwrap();
8294 pending_broadcast_messages.push(events::MessageSendEvent::BroadcastChannelUpdate {
8298 pending_msg_events.push(events::MessageSendEvent::HandleError {
8299 node_id: chan.context.get_counterparty_node_id(),
8300 action: msgs::ErrorAction::DisconnectPeer {
8301 msg: Some(msgs::ErrorMessage { channel_id: chan.context.channel_id(), data: reason.to_string() })
8309 MonitorEvent::Completed { funding_txo, channel_id, monitor_update_id } => {
8310 self.channel_monitor_updated(&funding_txo, &channel_id, monitor_update_id, counterparty_node_id.as_ref());
8316 for failure in failed_channels.drain(..) {
8317 self.finish_close_channel(failure);
8320 has_pending_monitor_events
8323 /// In chanmon_consistency_target, we'd like to be able to restore monitor updating without
8324 /// handling all pending events (i.e. not PendingHTLCsForwardable). Thus, we expose monitor
8325 /// update events as a separate process method here.
8327 pub fn process_monitor_events(&self) {
8328 let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
8329 self.process_pending_monitor_events();
8332 /// Check the holding cell in each channel and free any pending HTLCs in them if possible.
8333 /// Returns whether there were any updates such as if pending HTLCs were freed or a monitor
8334 /// update was applied.
8335 fn check_free_holding_cells(&self) -> bool {
8336 let mut has_monitor_update = false;
8337 let mut failed_htlcs = Vec::new();
8339 // Walk our list of channels and find any that need to update. Note that when we do find an
8340 // update, if it includes actions that must be taken afterwards, we have to drop the
8341 // per-peer state lock as well as the top level per_peer_state lock. Thus, we loop until we
8342 // manage to go through all our peers without finding a single channel to update.
8344 let per_peer_state = self.per_peer_state.read().unwrap();
8345 for (_cp_id, peer_state_mutex) in per_peer_state.iter() {
8347 let mut peer_state_lock = peer_state_mutex.lock().unwrap();
8348 let peer_state: &mut PeerState<_> = &mut *peer_state_lock;
8349 for (channel_id, chan) in peer_state.channel_by_id.iter_mut().filter_map(
8350 |(chan_id, phase)| if let ChannelPhase::Funded(chan) = phase { Some((chan_id, chan)) } else { None }
8352 let counterparty_node_id = chan.context.get_counterparty_node_id();
8353 let funding_txo = chan.context.get_funding_txo();
8354 let (monitor_opt, holding_cell_failed_htlcs) =
8355 chan.maybe_free_holding_cell_htlcs(&self.fee_estimator, &&WithChannelContext::from(&self.logger, &chan.context, None));
8356 if !holding_cell_failed_htlcs.is_empty() {
8357 failed_htlcs.push((holding_cell_failed_htlcs, *channel_id, counterparty_node_id));
8359 if let Some(monitor_update) = monitor_opt {
8360 has_monitor_update = true;
8362 handle_new_monitor_update!(self, funding_txo.unwrap(), monitor_update,
8363 peer_state_lock, peer_state, per_peer_state, chan);
8364 continue 'peer_loop;
8373 let has_update = has_monitor_update || !failed_htlcs.is_empty();
8374 for (failures, channel_id, counterparty_node_id) in failed_htlcs.drain(..) {
8375 self.fail_holding_cell_htlcs(failures, channel_id, &counterparty_node_id);
8381 /// When a call to a [`ChannelSigner`] method returns an error, this indicates that the signer
8382 /// is (temporarily) unavailable, and the operation should be retried later.
8384 /// This method allows for that retry - either checking for any signer-pending messages to be
8385 /// attempted in every channel, or in the specifically provided channel.
8387 /// [`ChannelSigner`]: crate::sign::ChannelSigner
8388 #[cfg(async_signing)]
8389 pub fn signer_unblocked(&self, channel_opt: Option<(PublicKey, ChannelId)>) {
8390 let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
8392 let unblock_chan = |phase: &mut ChannelPhase<SP>, pending_msg_events: &mut Vec<MessageSendEvent>| {
8393 let node_id = phase.context().get_counterparty_node_id();
8395 ChannelPhase::Funded(chan) => {
8396 let msgs = chan.signer_maybe_unblocked(&self.logger);
8397 if let Some(updates) = msgs.commitment_update {
8398 pending_msg_events.push(events::MessageSendEvent::UpdateHTLCs {
8403 if let Some(msg) = msgs.funding_signed {
8404 pending_msg_events.push(events::MessageSendEvent::SendFundingSigned {
8409 if let Some(msg) = msgs.channel_ready {
8410 send_channel_ready!(self, pending_msg_events, chan, msg);
8413 ChannelPhase::UnfundedOutboundV1(chan) => {
8414 if let Some(msg) = chan.signer_maybe_unblocked(&self.logger) {
8415 pending_msg_events.push(events::MessageSendEvent::SendFundingCreated {
8421 ChannelPhase::UnfundedInboundV1(_) => {},
8425 let per_peer_state = self.per_peer_state.read().unwrap();
8426 if let Some((counterparty_node_id, channel_id)) = channel_opt {
8427 if let Some(peer_state_mutex) = per_peer_state.get(&counterparty_node_id) {
8428 let mut peer_state_lock = peer_state_mutex.lock().unwrap();
8429 let peer_state = &mut *peer_state_lock;
8430 if let Some(chan) = peer_state.channel_by_id.get_mut(&channel_id) {
8431 unblock_chan(chan, &mut peer_state.pending_msg_events);
8435 for (_cp_id, peer_state_mutex) in per_peer_state.iter() {
8436 let mut peer_state_lock = peer_state_mutex.lock().unwrap();
8437 let peer_state = &mut *peer_state_lock;
8438 for (_, chan) in peer_state.channel_by_id.iter_mut() {
8439 unblock_chan(chan, &mut peer_state.pending_msg_events);
8445 /// Check whether any channels have finished removing all pending updates after a shutdown
8446 /// exchange and can now send a closing_signed.
8447 /// Returns whether any closing_signed messages were generated.
8448 fn maybe_generate_initial_closing_signed(&self) -> bool {
8449 let mut handle_errors: Vec<(PublicKey, Result<(), _>)> = Vec::new();
8450 let mut has_update = false;
8451 let mut shutdown_results = Vec::new();
8453 let per_peer_state = self.per_peer_state.read().unwrap();
8455 for (_cp_id, peer_state_mutex) in per_peer_state.iter() {
8456 let mut peer_state_lock = peer_state_mutex.lock().unwrap();
8457 let peer_state = &mut *peer_state_lock;
8458 let pending_msg_events = &mut peer_state.pending_msg_events;
8459 peer_state.channel_by_id.retain(|channel_id, phase| {
8461 ChannelPhase::Funded(chan) => {
8462 let logger = WithChannelContext::from(&self.logger, &chan.context, None);
8463 match chan.maybe_propose_closing_signed(&self.fee_estimator, &&logger) {
8464 Ok((msg_opt, tx_opt, shutdown_result_opt)) => {
8465 if let Some(msg) = msg_opt {
8467 pending_msg_events.push(events::MessageSendEvent::SendClosingSigned {
8468 node_id: chan.context.get_counterparty_node_id(), msg,
8471 debug_assert_eq!(shutdown_result_opt.is_some(), chan.is_shutdown());
8472 if let Some(shutdown_result) = shutdown_result_opt {
8473 shutdown_results.push(shutdown_result);
8475 if let Some(tx) = tx_opt {
8476 // We're done with this channel. We got a closing_signed and sent back
8477 // a closing_signed with a closing transaction to broadcast.
8478 if let Ok(update) = self.get_channel_update_for_broadcast(&chan) {
8479 let mut pending_broadcast_messages = self.pending_broadcast_messages.lock().unwrap();
8480 pending_broadcast_messages.push(events::MessageSendEvent::BroadcastChannelUpdate {
8485 log_info!(logger, "Broadcasting {}", log_tx!(tx));
8486 self.tx_broadcaster.broadcast_transactions(&[&tx]);
8487 update_maps_on_chan_removal!(self, &chan.context);
8493 let (close_channel, res) = convert_chan_phase_err!(self, e, chan, channel_id, FUNDED_CHANNEL);
8494 handle_errors.push((chan.context.get_counterparty_node_id(), Err(res)));
8499 _ => true, // Retain unfunded channels if present.
8505 for (counterparty_node_id, err) in handle_errors.drain(..) {
8506 let _ = handle_error!(self, err, counterparty_node_id);
8509 for shutdown_result in shutdown_results.drain(..) {
8510 self.finish_close_channel(shutdown_result);
8516 /// Handle a list of channel failures during a block_connected or block_disconnected call,
8517 /// pushing the channel monitor update (if any) to the background events queue and removing the
8519 fn handle_init_event_channel_failures(&self, mut failed_channels: Vec<ShutdownResult>) {
8520 for mut failure in failed_channels.drain(..) {
8521 // Either a commitment transactions has been confirmed on-chain or
8522 // Channel::block_disconnected detected that the funding transaction has been
8523 // reorganized out of the main chain.
8524 // We cannot broadcast our latest local state via monitor update (as
8525 // Channel::force_shutdown tries to make us do) as we may still be in initialization,
8526 // so we track the update internally and handle it when the user next calls
8527 // timer_tick_occurred, guaranteeing we're running normally.
8528 if let Some((counterparty_node_id, funding_txo, channel_id, update)) = failure.monitor_update.take() {
8529 assert_eq!(update.updates.len(), 1);
8530 if let ChannelMonitorUpdateStep::ChannelForceClosed { should_broadcast } = update.updates[0] {
8531 assert!(should_broadcast);
8532 } else { unreachable!(); }
8533 self.pending_background_events.lock().unwrap().push(
8534 BackgroundEvent::MonitorUpdateRegeneratedOnStartup {
8535 counterparty_node_id, funding_txo, update, channel_id,
8538 self.finish_close_channel(failure);
8543 macro_rules! create_offer_builder { ($self: ident, $builder: ty) => {
8544 /// Creates an [`OfferBuilder`] such that the [`Offer`] it builds is recognized by the
8545 /// [`ChannelManager`] when handling [`InvoiceRequest`] messages for the offer. The offer will
8546 /// not have an expiration unless otherwise set on the builder.
8550 /// Uses [`MessageRouter::create_blinded_paths`] to construct a [`BlindedPath`] for the offer.
8551 /// However, if one is not found, uses a one-hop [`BlindedPath`] with
8552 /// [`ChannelManager::get_our_node_id`] as the introduction node instead. In the latter case,
8553 /// the node must be announced, otherwise, there is no way to find a path to the introduction in
8554 /// order to send the [`InvoiceRequest`].
8556 /// Also, uses a derived signing pubkey in the offer for recipient privacy.
8560 /// Requires a direct connection to the introduction node in the responding [`InvoiceRequest`]'s
8565 /// Errors if the parameterized [`Router`] is unable to create a blinded path for the offer.
8567 /// [`Offer`]: crate::offers::offer::Offer
8568 /// [`InvoiceRequest`]: crate::offers::invoice_request::InvoiceRequest
8569 pub fn create_offer_builder(&$self) -> Result<$builder, Bolt12SemanticError> {
8570 let node_id = $self.get_our_node_id();
8571 let expanded_key = &$self.inbound_payment_key;
8572 let entropy = &*$self.entropy_source;
8573 let secp_ctx = &$self.secp_ctx;
8575 let path = $self.create_blinded_path().map_err(|_| Bolt12SemanticError::MissingPaths)?;
8576 let builder = OfferBuilder::deriving_signing_pubkey(
8577 node_id, expanded_key, entropy, secp_ctx
8579 .chain_hash($self.chain_hash)
8586 macro_rules! create_refund_builder { ($self: ident, $builder: ty) => {
8587 /// Creates a [`RefundBuilder`] such that the [`Refund`] it builds is recognized by the
8588 /// [`ChannelManager`] when handling [`Bolt12Invoice`] messages for the refund.
8592 /// The provided `payment_id` is used to ensure that only one invoice is paid for the refund.
8593 /// See [Avoiding Duplicate Payments] for other requirements once the payment has been sent.
8595 /// The builder will have the provided expiration set. Any changes to the expiration on the
8596 /// returned builder will not be honored by [`ChannelManager`]. For `no-std`, the highest seen
8597 /// block time minus two hours is used for the current time when determining if the refund has
8600 /// To revoke the refund, use [`ChannelManager::abandon_payment`] prior to receiving the
8601 /// invoice. If abandoned, or an invoice isn't received before expiration, the payment will fail
8602 /// with an [`Event::InvoiceRequestFailed`].
8604 /// If `max_total_routing_fee_msat` is not specified, The default from
8605 /// [`RouteParameters::from_payment_params_and_value`] is applied.
8609 /// Uses [`MessageRouter::create_blinded_paths`] to construct a [`BlindedPath`] for the refund.
8610 /// However, if one is not found, uses a one-hop [`BlindedPath`] with
8611 /// [`ChannelManager::get_our_node_id`] as the introduction node instead. In the latter case,
8612 /// the node must be announced, otherwise, there is no way to find a path to the introduction in
8613 /// order to send the [`Bolt12Invoice`].
8615 /// Also, uses a derived payer id in the refund for payer privacy.
8619 /// Requires a direct connection to an introduction node in the responding
8620 /// [`Bolt12Invoice::payment_paths`].
8625 /// - a duplicate `payment_id` is provided given the caveats in the aforementioned link,
8626 /// - `amount_msats` is invalid, or
8627 /// - the parameterized [`Router`] is unable to create a blinded path for the refund.
8629 /// [`Refund`]: crate::offers::refund::Refund
8630 /// [`Bolt12Invoice`]: crate::offers::invoice::Bolt12Invoice
8631 /// [`Bolt12Invoice::payment_paths`]: crate::offers::invoice::Bolt12Invoice::payment_paths
8632 /// [Avoiding Duplicate Payments]: #avoiding-duplicate-payments
8633 pub fn create_refund_builder(
8634 &$self, amount_msats: u64, absolute_expiry: Duration, payment_id: PaymentId,
8635 retry_strategy: Retry, max_total_routing_fee_msat: Option<u64>
8636 ) -> Result<$builder, Bolt12SemanticError> {
8637 let node_id = $self.get_our_node_id();
8638 let expanded_key = &$self.inbound_payment_key;
8639 let entropy = &*$self.entropy_source;
8640 let secp_ctx = &$self.secp_ctx;
8642 let path = $self.create_blinded_path().map_err(|_| Bolt12SemanticError::MissingPaths)?;
8643 let builder = RefundBuilder::deriving_payer_id(
8644 node_id, expanded_key, entropy, secp_ctx, amount_msats, payment_id
8646 .chain_hash($self.chain_hash)
8647 .absolute_expiry(absolute_expiry)
8650 let _persistence_guard = PersistenceNotifierGuard::notify_on_drop($self);
8652 let expiration = StaleExpiration::AbsoluteTimeout(absolute_expiry);
8653 $self.pending_outbound_payments
8654 .add_new_awaiting_invoice(
8655 payment_id, expiration, retry_strategy, max_total_routing_fee_msat,
8657 .map_err(|_| Bolt12SemanticError::DuplicatePaymentId)?;
8663 impl<M: Deref, T: Deref, ES: Deref, NS: Deref, SP: Deref, F: Deref, R: Deref, L: Deref> ChannelManager<M, T, ES, NS, SP, F, R, L>
8665 M::Target: chain::Watch<<SP::Target as SignerProvider>::EcdsaSigner>,
8666 T::Target: BroadcasterInterface,
8667 ES::Target: EntropySource,
8668 NS::Target: NodeSigner,
8669 SP::Target: SignerProvider,
8670 F::Target: FeeEstimator,
8674 #[cfg(not(c_bindings))]
8675 create_offer_builder!(self, OfferBuilder<DerivedMetadata, secp256k1::All>);
8676 #[cfg(not(c_bindings))]
8677 create_refund_builder!(self, RefundBuilder<secp256k1::All>);
8680 create_offer_builder!(self, OfferWithDerivedMetadataBuilder);
8682 create_refund_builder!(self, RefundMaybeWithDerivedMetadataBuilder);
8684 /// Pays for an [`Offer`] using the given parameters by creating an [`InvoiceRequest`] and
8685 /// enqueuing it to be sent via an onion message. [`ChannelManager`] will pay the actual
8686 /// [`Bolt12Invoice`] once it is received.
8688 /// Uses [`InvoiceRequestBuilder`] such that the [`InvoiceRequest`] it builds is recognized by
8689 /// the [`ChannelManager`] when handling a [`Bolt12Invoice`] message in response to the request.
8690 /// The optional parameters are used in the builder, if `Some`:
8691 /// - `quantity` for [`InvoiceRequest::quantity`] which must be set if
8692 /// [`Offer::expects_quantity`] is `true`.
8693 /// - `amount_msats` if overpaying what is required for the given `quantity` is desired, and
8694 /// - `payer_note` for [`InvoiceRequest::payer_note`].
8696 /// If `max_total_routing_fee_msat` is not specified, The default from
8697 /// [`RouteParameters::from_payment_params_and_value`] is applied.
8701 /// The provided `payment_id` is used to ensure that only one invoice is paid for the request
8702 /// when received. See [Avoiding Duplicate Payments] for other requirements once the payment has
8705 /// To revoke the request, use [`ChannelManager::abandon_payment`] prior to receiving the
8706 /// invoice. If abandoned, or an invoice isn't received in a reasonable amount of time, the
8707 /// payment will fail with an [`Event::InvoiceRequestFailed`].
8711 /// Uses a one-hop [`BlindedPath`] for the reply path with [`ChannelManager::get_our_node_id`]
8712 /// as the introduction node and a derived payer id for payer privacy. As such, currently, the
8713 /// node must be announced. Otherwise, there is no way to find a path to the introduction node
8714 /// in order to send the [`Bolt12Invoice`].
8718 /// Requires a direct connection to an introduction node in [`Offer::paths`] or to
8719 /// [`Offer::signing_pubkey`], if empty. A similar restriction applies to the responding
8720 /// [`Bolt12Invoice::payment_paths`].
8725 /// - a duplicate `payment_id` is provided given the caveats in the aforementioned link,
8726 /// - the provided parameters are invalid for the offer,
8727 /// - the offer is for an unsupported chain, or
8728 /// - the parameterized [`Router`] is unable to create a blinded reply path for the invoice
8731 /// [`InvoiceRequest`]: crate::offers::invoice_request::InvoiceRequest
8732 /// [`InvoiceRequest::quantity`]: crate::offers::invoice_request::InvoiceRequest::quantity
8733 /// [`InvoiceRequest::payer_note`]: crate::offers::invoice_request::InvoiceRequest::payer_note
8734 /// [`InvoiceRequestBuilder`]: crate::offers::invoice_request::InvoiceRequestBuilder
8735 /// [`Bolt12Invoice`]: crate::offers::invoice::Bolt12Invoice
8736 /// [`Bolt12Invoice::payment_paths`]: crate::offers::invoice::Bolt12Invoice::payment_paths
8737 /// [Avoiding Duplicate Payments]: #avoiding-duplicate-payments
8738 pub fn pay_for_offer(
8739 &self, offer: &Offer, quantity: Option<u64>, amount_msats: Option<u64>,
8740 payer_note: Option<String>, payment_id: PaymentId, retry_strategy: Retry,
8741 max_total_routing_fee_msat: Option<u64>
8742 ) -> Result<(), Bolt12SemanticError> {
8743 let expanded_key = &self.inbound_payment_key;
8744 let entropy = &*self.entropy_source;
8745 let secp_ctx = &self.secp_ctx;
8747 let builder: InvoiceRequestBuilder<DerivedPayerId, secp256k1::All> = offer
8748 .request_invoice_deriving_payer_id(expanded_key, entropy, secp_ctx, payment_id)?
8750 let builder = builder.chain_hash(self.chain_hash)?;
8752 let builder = match quantity {
8754 Some(quantity) => builder.quantity(quantity)?,
8756 let builder = match amount_msats {
8758 Some(amount_msats) => builder.amount_msats(amount_msats)?,
8760 let builder = match payer_note {
8762 Some(payer_note) => builder.payer_note(payer_note),
8764 let invoice_request = builder.build_and_sign()?;
8765 let reply_path = self.create_blinded_path().map_err(|_| Bolt12SemanticError::MissingPaths)?;
8767 let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
8769 let expiration = StaleExpiration::TimerTicks(1);
8770 self.pending_outbound_payments
8771 .add_new_awaiting_invoice(
8772 payment_id, expiration, retry_strategy, max_total_routing_fee_msat
8774 .map_err(|_| Bolt12SemanticError::DuplicatePaymentId)?;
8776 let mut pending_offers_messages = self.pending_offers_messages.lock().unwrap();
8777 if !offer.paths().is_empty() {
8778 // Send as many invoice requests as there are paths in the offer (with an upper bound).
8779 // Using only one path could result in a failure if the path no longer exists. But only
8780 // one invoice for a given payment id will be paid, even if more than one is received.
8781 const REQUEST_LIMIT: usize = 10;
8782 for path in offer.paths().into_iter().take(REQUEST_LIMIT) {
8783 let message = new_pending_onion_message(
8784 OffersMessage::InvoiceRequest(invoice_request.clone()),
8785 Destination::BlindedPath(path.clone()),
8786 Some(reply_path.clone()),
8788 pending_offers_messages.push(message);
8790 } else if let Some(signing_pubkey) = offer.signing_pubkey() {
8791 let message = new_pending_onion_message(
8792 OffersMessage::InvoiceRequest(invoice_request),
8793 Destination::Node(signing_pubkey),
8796 pending_offers_messages.push(message);
8798 debug_assert!(false);
8799 return Err(Bolt12SemanticError::MissingSigningPubkey);
8805 /// Creates a [`Bolt12Invoice`] for a [`Refund`] and enqueues it to be sent via an onion
8808 /// The resulting invoice uses a [`PaymentHash`] recognized by the [`ChannelManager`] and a
8809 /// [`BlindedPath`] containing the [`PaymentSecret`] needed to reconstruct the corresponding
8810 /// [`PaymentPreimage`]. It is returned purely for informational purposes.
8814 /// Requires a direct connection to an introduction node in [`Refund::paths`] or to
8815 /// [`Refund::payer_id`], if empty. This request is best effort; an invoice will be sent to each
8816 /// node meeting the aforementioned criteria, but there's no guarantee that they will be
8817 /// received and no retries will be made.
8822 /// - the refund is for an unsupported chain, or
8823 /// - the parameterized [`Router`] is unable to create a blinded payment path or reply path for
8826 /// [`Bolt12Invoice`]: crate::offers::invoice::Bolt12Invoice
8827 pub fn request_refund_payment(
8828 &self, refund: &Refund
8829 ) -> Result<Bolt12Invoice, Bolt12SemanticError> {
8830 let expanded_key = &self.inbound_payment_key;
8831 let entropy = &*self.entropy_source;
8832 let secp_ctx = &self.secp_ctx;
8834 let amount_msats = refund.amount_msats();
8835 let relative_expiry = DEFAULT_RELATIVE_EXPIRY.as_secs() as u32;
8837 if refund.chain() != self.chain_hash {
8838 return Err(Bolt12SemanticError::UnsupportedChain);
8841 let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
8843 match self.create_inbound_payment(Some(amount_msats), relative_expiry, None) {
8844 Ok((payment_hash, payment_secret)) => {
8845 let payment_context = PaymentContext::Bolt12Refund(Bolt12RefundContext {});
8846 let payment_paths = self.create_blinded_payment_paths(
8847 amount_msats, payment_secret, payment_context
8849 .map_err(|_| Bolt12SemanticError::MissingPaths)?;
8851 #[cfg(feature = "std")]
8852 let builder = refund.respond_using_derived_keys(
8853 payment_paths, payment_hash, expanded_key, entropy
8855 #[cfg(not(feature = "std"))]
8856 let created_at = Duration::from_secs(
8857 self.highest_seen_timestamp.load(Ordering::Acquire) as u64
8859 #[cfg(not(feature = "std"))]
8860 let builder = refund.respond_using_derived_keys_no_std(
8861 payment_paths, payment_hash, created_at, expanded_key, entropy
8863 let builder: InvoiceBuilder<DerivedSigningPubkey> = builder.into();
8864 let invoice = builder.allow_mpp().build_and_sign(secp_ctx)?;
8865 let reply_path = self.create_blinded_path()
8866 .map_err(|_| Bolt12SemanticError::MissingPaths)?;
8868 let mut pending_offers_messages = self.pending_offers_messages.lock().unwrap();
8869 if refund.paths().is_empty() {
8870 let message = new_pending_onion_message(
8871 OffersMessage::Invoice(invoice.clone()),
8872 Destination::Node(refund.payer_id()),
8875 pending_offers_messages.push(message);
8877 for path in refund.paths() {
8878 let message = new_pending_onion_message(
8879 OffersMessage::Invoice(invoice.clone()),
8880 Destination::BlindedPath(path.clone()),
8881 Some(reply_path.clone()),
8883 pending_offers_messages.push(message);
8889 Err(()) => Err(Bolt12SemanticError::InvalidAmount),
8893 /// Gets a payment secret and payment hash for use in an invoice given to a third party wishing
8896 /// This differs from [`create_inbound_payment_for_hash`] only in that it generates the
8897 /// [`PaymentHash`] and [`PaymentPreimage`] for you.
8899 /// The [`PaymentPreimage`] will ultimately be returned to you in the [`PaymentClaimable`] event, which
8900 /// will have the [`PaymentClaimable::purpose`] return `Some` for [`PaymentPurpose::preimage`]. That
8901 /// should then be passed directly to [`claim_funds`].
8903 /// See [`create_inbound_payment_for_hash`] for detailed documentation on behavior and requirements.
8905 /// Note that a malicious eavesdropper can intuit whether an inbound payment was created by
8906 /// `create_inbound_payment` or `create_inbound_payment_for_hash` based on runtime.
8910 /// If you register an inbound payment with this method, then serialize the `ChannelManager`, then
8911 /// deserialize it with a node running 0.0.103 and earlier, the payment will fail to be received.
8913 /// Errors if `min_value_msat` is greater than total bitcoin supply.
8915 /// If `min_final_cltv_expiry_delta` is set to some value, then the payment will not be receivable
8916 /// on versions of LDK prior to 0.0.114.
8918 /// [`claim_funds`]: Self::claim_funds
8919 /// [`PaymentClaimable`]: events::Event::PaymentClaimable
8920 /// [`PaymentClaimable::purpose`]: events::Event::PaymentClaimable::purpose
8921 /// [`PaymentPurpose::preimage`]: events::PaymentPurpose::preimage
8922 /// [`create_inbound_payment_for_hash`]: Self::create_inbound_payment_for_hash
8923 pub fn create_inbound_payment(&self, min_value_msat: Option<u64>, invoice_expiry_delta_secs: u32,
8924 min_final_cltv_expiry_delta: Option<u16>) -> Result<(PaymentHash, PaymentSecret), ()> {
8925 inbound_payment::create(&self.inbound_payment_key, min_value_msat, invoice_expiry_delta_secs,
8926 &self.entropy_source, self.highest_seen_timestamp.load(Ordering::Acquire) as u64,
8927 min_final_cltv_expiry_delta)
8930 /// Gets a [`PaymentSecret`] for a given [`PaymentHash`], for which the payment preimage is
8931 /// stored external to LDK.
8933 /// A [`PaymentClaimable`] event will only be generated if the [`PaymentSecret`] matches a
8934 /// payment secret fetched via this method or [`create_inbound_payment`], and which is at least
8935 /// the `min_value_msat` provided here, if one is provided.
8937 /// The [`PaymentHash`] (and corresponding [`PaymentPreimage`]) should be globally unique, though
8938 /// note that LDK will not stop you from registering duplicate payment hashes for inbound
8941 /// `min_value_msat` should be set if the invoice being generated contains a value. Any payment
8942 /// received for the returned [`PaymentHash`] will be required to be at least `min_value_msat`
8943 /// before a [`PaymentClaimable`] event will be generated, ensuring that we do not provide the
8944 /// sender "proof-of-payment" unless they have paid the required amount.
8946 /// `invoice_expiry_delta_secs` describes the number of seconds that the invoice is valid for
8947 /// in excess of the current time. This should roughly match the expiry time set in the invoice.
8948 /// After this many seconds, we will remove the inbound payment, resulting in any attempts to
8949 /// pay the invoice failing. The BOLT spec suggests 3,600 secs as a default validity time for
8950 /// invoices when no timeout is set.
8952 /// Note that we use block header time to time-out pending inbound payments (with some margin
8953 /// to compensate for the inaccuracy of block header timestamps). Thus, in practice we will
8954 /// accept a payment and generate a [`PaymentClaimable`] event for some time after the expiry.
8955 /// If you need exact expiry semantics, you should enforce them upon receipt of
8956 /// [`PaymentClaimable`].
8958 /// Note that invoices generated for inbound payments should have their `min_final_cltv_expiry_delta`
8959 /// set to at least [`MIN_FINAL_CLTV_EXPIRY_DELTA`].
8961 /// Note that a malicious eavesdropper can intuit whether an inbound payment was created by
8962 /// `create_inbound_payment` or `create_inbound_payment_for_hash` based on runtime.
8966 /// If you register an inbound payment with this method, then serialize the `ChannelManager`, then
8967 /// deserialize it with a node running 0.0.103 and earlier, the payment will fail to be received.
8969 /// Errors if `min_value_msat` is greater than total bitcoin supply.
8971 /// If `min_final_cltv_expiry_delta` is set to some value, then the payment will not be receivable
8972 /// on versions of LDK prior to 0.0.114.
8974 /// [`create_inbound_payment`]: Self::create_inbound_payment
8975 /// [`PaymentClaimable`]: events::Event::PaymentClaimable
8976 pub fn create_inbound_payment_for_hash(&self, payment_hash: PaymentHash, min_value_msat: Option<u64>,
8977 invoice_expiry_delta_secs: u32, min_final_cltv_expiry: Option<u16>) -> Result<PaymentSecret, ()> {
8978 inbound_payment::create_from_hash(&self.inbound_payment_key, min_value_msat, payment_hash,
8979 invoice_expiry_delta_secs, self.highest_seen_timestamp.load(Ordering::Acquire) as u64,
8980 min_final_cltv_expiry)
8983 /// Gets an LDK-generated payment preimage from a payment hash and payment secret that were
8984 /// previously returned from [`create_inbound_payment`].
8986 /// [`create_inbound_payment`]: Self::create_inbound_payment
8987 pub fn get_payment_preimage(&self, payment_hash: PaymentHash, payment_secret: PaymentSecret) -> Result<PaymentPreimage, APIError> {
8988 inbound_payment::get_payment_preimage(payment_hash, payment_secret, &self.inbound_payment_key)
8991 /// Creates a blinded path by delegating to [`MessageRouter::create_blinded_paths`].
8993 /// Errors if the `MessageRouter` errors or returns an empty `Vec`.
8994 fn create_blinded_path(&self) -> Result<BlindedPath, ()> {
8995 let recipient = self.get_our_node_id();
8996 let secp_ctx = &self.secp_ctx;
8998 let peers = self.per_peer_state.read().unwrap()
9000 .map(|(node_id, peer_state)| (node_id, peer_state.lock().unwrap()))
9001 .filter(|(_, peer)| peer.latest_features.supports_onion_messages())
9002 .map(|(node_id, peer)| ForwardNode {
9004 short_channel_id: peer.channel_by_id
9006 .filter(|(_, channel)| channel.context().is_usable())
9007 .min_by_key(|(_, channel)| channel.context().channel_creation_height)
9008 .and_then(|(_, channel)| channel.context().get_short_channel_id()),
9010 .collect::<Vec<_>>();
9013 .create_blinded_paths(recipient, peers, secp_ctx)
9014 .and_then(|paths| paths.into_iter().next().ok_or(()))
9017 /// Creates multi-hop blinded payment paths for the given `amount_msats` by delegating to
9018 /// [`Router::create_blinded_payment_paths`].
9019 fn create_blinded_payment_paths(
9020 &self, amount_msats: u64, payment_secret: PaymentSecret, payment_context: PaymentContext
9021 ) -> Result<Vec<(BlindedPayInfo, BlindedPath)>, ()> {
9022 let secp_ctx = &self.secp_ctx;
9024 let first_hops = self.list_usable_channels();
9025 let payee_node_id = self.get_our_node_id();
9026 let max_cltv_expiry = self.best_block.read().unwrap().height + CLTV_FAR_FAR_AWAY
9027 + LATENCY_GRACE_PERIOD_BLOCKS;
9028 let payee_tlvs = ReceiveTlvs {
9030 payment_constraints: PaymentConstraints {
9032 htlc_minimum_msat: 1,
9036 self.router.create_blinded_payment_paths(
9037 payee_node_id, first_hops, payee_tlvs, amount_msats, secp_ctx
9041 /// Gets a fake short channel id for use in receiving [phantom node payments]. These fake scids
9042 /// are used when constructing the phantom invoice's route hints.
9044 /// [phantom node payments]: crate::sign::PhantomKeysManager
9045 pub fn get_phantom_scid(&self) -> u64 {
9046 let best_block_height = self.best_block.read().unwrap().height;
9047 let short_to_chan_info = self.short_to_chan_info.read().unwrap();
9049 let scid_candidate = fake_scid::Namespace::Phantom.get_fake_scid(best_block_height, &self.chain_hash, &self.fake_scid_rand_bytes, &self.entropy_source);
9050 // Ensure the generated scid doesn't conflict with a real channel.
9051 match short_to_chan_info.get(&scid_candidate) {
9052 Some(_) => continue,
9053 None => return scid_candidate
9058 /// Gets route hints for use in receiving [phantom node payments].
9060 /// [phantom node payments]: crate::sign::PhantomKeysManager
9061 pub fn get_phantom_route_hints(&self) -> PhantomRouteHints {
9063 channels: self.list_usable_channels(),
9064 phantom_scid: self.get_phantom_scid(),
9065 real_node_pubkey: self.get_our_node_id(),
9069 /// Gets a fake short channel id for use in receiving intercepted payments. These fake scids are
9070 /// used when constructing the route hints for HTLCs intended to be intercepted. See
9071 /// [`ChannelManager::forward_intercepted_htlc`].
9073 /// Note that this method is not guaranteed to return unique values, you may need to call it a few
9074 /// times to get a unique scid.
9075 pub fn get_intercept_scid(&self) -> u64 {
9076 let best_block_height = self.best_block.read().unwrap().height;
9077 let short_to_chan_info = self.short_to_chan_info.read().unwrap();
9079 let scid_candidate = fake_scid::Namespace::Intercept.get_fake_scid(best_block_height, &self.chain_hash, &self.fake_scid_rand_bytes, &self.entropy_source);
9080 // Ensure the generated scid doesn't conflict with a real channel.
9081 if short_to_chan_info.contains_key(&scid_candidate) { continue }
9082 return scid_candidate
9086 /// Gets inflight HTLC information by processing pending outbound payments that are in
9087 /// our channels. May be used during pathfinding to account for in-use channel liquidity.
9088 pub fn compute_inflight_htlcs(&self) -> InFlightHtlcs {
9089 let mut inflight_htlcs = InFlightHtlcs::new();
9091 let per_peer_state = self.per_peer_state.read().unwrap();
9092 for (_cp_id, peer_state_mutex) in per_peer_state.iter() {
9093 let mut peer_state_lock = peer_state_mutex.lock().unwrap();
9094 let peer_state = &mut *peer_state_lock;
9095 for chan in peer_state.channel_by_id.values().filter_map(
9096 |phase| if let ChannelPhase::Funded(chan) = phase { Some(chan) } else { None }
9098 for (htlc_source, _) in chan.inflight_htlc_sources() {
9099 if let HTLCSource::OutboundRoute { path, .. } = htlc_source {
9100 inflight_htlcs.process_path(path, self.get_our_node_id());
9109 #[cfg(any(test, feature = "_test_utils"))]
9110 pub fn get_and_clear_pending_events(&self) -> Vec<events::Event> {
9111 let events = core::cell::RefCell::new(Vec::new());
9112 let event_handler = |event: events::Event| events.borrow_mut().push(event);
9113 self.process_pending_events(&event_handler);
9117 #[cfg(feature = "_test_utils")]
9118 pub fn push_pending_event(&self, event: events::Event) {
9119 let mut events = self.pending_events.lock().unwrap();
9120 events.push_back((event, None));
9124 pub fn pop_pending_event(&self) -> Option<events::Event> {
9125 let mut events = self.pending_events.lock().unwrap();
9126 events.pop_front().map(|(e, _)| e)
9130 pub fn has_pending_payments(&self) -> bool {
9131 self.pending_outbound_payments.has_pending_payments()
9135 pub fn clear_pending_payments(&self) {
9136 self.pending_outbound_payments.clear_pending_payments()
9139 /// When something which was blocking a channel from updating its [`ChannelMonitor`] (e.g. an
9140 /// [`Event`] being handled) completes, this should be called to restore the channel to normal
9141 /// operation. It will double-check that nothing *else* is also blocking the same channel from
9142 /// making progress and then let any blocked [`ChannelMonitorUpdate`]s fly.
9143 fn handle_monitor_update_release(&self, counterparty_node_id: PublicKey,
9144 channel_funding_outpoint: OutPoint, channel_id: ChannelId,
9145 mut completed_blocker: Option<RAAMonitorUpdateBlockingAction>) {
9147 let logger = WithContext::from(
9148 &self.logger, Some(counterparty_node_id), Some(channel_id), None
9151 let per_peer_state = self.per_peer_state.read().unwrap();
9152 if let Some(peer_state_mtx) = per_peer_state.get(&counterparty_node_id) {
9153 let mut peer_state_lck = peer_state_mtx.lock().unwrap();
9154 let peer_state = &mut *peer_state_lck;
9155 if let Some(blocker) = completed_blocker.take() {
9156 // Only do this on the first iteration of the loop.
9157 if let Some(blockers) = peer_state.actions_blocking_raa_monitor_updates
9158 .get_mut(&channel_id)
9160 blockers.retain(|iter| iter != &blocker);
9164 if self.raa_monitor_updates_held(&peer_state.actions_blocking_raa_monitor_updates,
9165 channel_funding_outpoint, channel_id, counterparty_node_id) {
9166 // Check that, while holding the peer lock, we don't have anything else
9167 // blocking monitor updates for this channel. If we do, release the monitor
9168 // update(s) when those blockers complete.
9169 log_trace!(logger, "Delaying monitor unlock for channel {} as another channel's mon update needs to complete first",
9174 if let hash_map::Entry::Occupied(mut chan_phase_entry) = peer_state.channel_by_id.entry(
9176 if let ChannelPhase::Funded(chan) = chan_phase_entry.get_mut() {
9177 debug_assert_eq!(chan.context.get_funding_txo().unwrap(), channel_funding_outpoint);
9178 if let Some((monitor_update, further_update_exists)) = chan.unblock_next_blocked_monitor_update() {
9179 log_debug!(logger, "Unlocking monitor updating for channel {} and updating monitor",
9181 handle_new_monitor_update!(self, channel_funding_outpoint, monitor_update,
9182 peer_state_lck, peer_state, per_peer_state, chan);
9183 if further_update_exists {
9184 // If there are more `ChannelMonitorUpdate`s to process, restart at the
9189 log_trace!(logger, "Unlocked monitor updating for channel {} without monitors to update",
9196 "Got a release post-RAA monitor update for peer {} but the channel is gone",
9197 log_pubkey!(counterparty_node_id));
9203 fn handle_post_event_actions(&self, actions: Vec<EventCompletionAction>) {
9204 for action in actions {
9206 EventCompletionAction::ReleaseRAAChannelMonitorUpdate {
9207 channel_funding_outpoint, channel_id, counterparty_node_id
9209 self.handle_monitor_update_release(counterparty_node_id, channel_funding_outpoint, channel_id, None);
9215 /// Processes any events asynchronously in the order they were generated since the last call
9216 /// using the given event handler.
9218 /// See the trait-level documentation of [`EventsProvider`] for requirements.
9219 pub async fn process_pending_events_async<Future: core::future::Future, H: Fn(Event) -> Future>(
9223 process_events_body!(self, ev, { handler(ev).await });
9227 impl<M: Deref, T: Deref, ES: Deref, NS: Deref, SP: Deref, F: Deref, R: Deref, L: Deref> MessageSendEventsProvider for ChannelManager<M, T, ES, NS, SP, F, R, L>
9229 M::Target: chain::Watch<<SP::Target as SignerProvider>::EcdsaSigner>,
9230 T::Target: BroadcasterInterface,
9231 ES::Target: EntropySource,
9232 NS::Target: NodeSigner,
9233 SP::Target: SignerProvider,
9234 F::Target: FeeEstimator,
9238 /// Returns `MessageSendEvent`s strictly ordered per-peer, in the order they were generated.
9239 /// The returned array will contain `MessageSendEvent`s for different peers if
9240 /// `MessageSendEvent`s to more than one peer exists, but `MessageSendEvent`s to the same peer
9241 /// is always placed next to each other.
9243 /// Note that that while `MessageSendEvent`s are strictly ordered per-peer, the peer order for
9244 /// the chunks of `MessageSendEvent`s for different peers is random. I.e. if the array contains
9245 /// `MessageSendEvent`s for both `node_a` and `node_b`, the `MessageSendEvent`s for `node_a`
9246 /// will randomly be placed first or last in the returned array.
9248 /// Note that even though `BroadcastChannelAnnouncement` and `BroadcastChannelUpdate`
9249 /// `MessageSendEvent`s are intended to be broadcasted to all peers, they will be placed among
9250 /// the `MessageSendEvent`s to the specific peer they were generated under.
9251 fn get_and_clear_pending_msg_events(&self) -> Vec<MessageSendEvent> {
9252 let events = RefCell::new(Vec::new());
9253 PersistenceNotifierGuard::optionally_notify(self, || {
9254 let mut result = NotifyOption::SkipPersistNoEvents;
9256 // TODO: This behavior should be documented. It's unintuitive that we query
9257 // ChannelMonitors when clearing other events.
9258 if self.process_pending_monitor_events() {
9259 result = NotifyOption::DoPersist;
9262 if self.check_free_holding_cells() {
9263 result = NotifyOption::DoPersist;
9265 if self.maybe_generate_initial_closing_signed() {
9266 result = NotifyOption::DoPersist;
9269 let mut is_any_peer_connected = false;
9270 let mut pending_events = Vec::new();
9271 let per_peer_state = self.per_peer_state.read().unwrap();
9272 for (_cp_id, peer_state_mutex) in per_peer_state.iter() {
9273 let mut peer_state_lock = peer_state_mutex.lock().unwrap();
9274 let peer_state = &mut *peer_state_lock;
9275 if peer_state.pending_msg_events.len() > 0 {
9276 pending_events.append(&mut peer_state.pending_msg_events);
9278 if peer_state.is_connected {
9279 is_any_peer_connected = true
9283 // Ensure that we are connected to some peers before getting broadcast messages.
9284 if is_any_peer_connected {
9285 let mut broadcast_msgs = self.pending_broadcast_messages.lock().unwrap();
9286 pending_events.append(&mut broadcast_msgs);
9289 if !pending_events.is_empty() {
9290 events.replace(pending_events);
9299 impl<M: Deref, T: Deref, ES: Deref, NS: Deref, SP: Deref, F: Deref, R: Deref, L: Deref> EventsProvider for ChannelManager<M, T, ES, NS, SP, F, R, L>
9301 M::Target: chain::Watch<<SP::Target as SignerProvider>::EcdsaSigner>,
9302 T::Target: BroadcasterInterface,
9303 ES::Target: EntropySource,
9304 NS::Target: NodeSigner,
9305 SP::Target: SignerProvider,
9306 F::Target: FeeEstimator,
9310 /// Processes events that must be periodically handled.
9312 /// An [`EventHandler`] may safely call back to the provider in order to handle an event.
9313 /// However, it must not call [`Writeable::write`] as doing so would result in a deadlock.
9314 fn process_pending_events<H: Deref>(&self, handler: H) where H::Target: EventHandler {
9316 process_events_body!(self, ev, handler.handle_event(ev));
9320 impl<M: Deref, T: Deref, ES: Deref, NS: Deref, SP: Deref, F: Deref, R: Deref, L: Deref> chain::Listen for ChannelManager<M, T, ES, NS, SP, F, R, L>
9322 M::Target: chain::Watch<<SP::Target as SignerProvider>::EcdsaSigner>,
9323 T::Target: BroadcasterInterface,
9324 ES::Target: EntropySource,
9325 NS::Target: NodeSigner,
9326 SP::Target: SignerProvider,
9327 F::Target: FeeEstimator,
9331 fn filtered_block_connected(&self, header: &Header, txdata: &TransactionData, height: u32) {
9333 let best_block = self.best_block.read().unwrap();
9334 assert_eq!(best_block.block_hash, header.prev_blockhash,
9335 "Blocks must be connected in chain-order - the connected header must build on the last connected header");
9336 assert_eq!(best_block.height, height - 1,
9337 "Blocks must be connected in chain-order - the connected block height must be one greater than the previous height");
9340 self.transactions_confirmed(header, txdata, height);
9341 self.best_block_updated(header, height);
9344 fn block_disconnected(&self, header: &Header, height: u32) {
9345 let _persistence_guard =
9346 PersistenceNotifierGuard::optionally_notify_skipping_background_events(
9347 self, || -> NotifyOption { NotifyOption::DoPersist });
9348 let new_height = height - 1;
9350 let mut best_block = self.best_block.write().unwrap();
9351 assert_eq!(best_block.block_hash, header.block_hash(),
9352 "Blocks must be disconnected in chain-order - the disconnected header must be the last connected header");
9353 assert_eq!(best_block.height, height,
9354 "Blocks must be disconnected in chain-order - the disconnected block must have the correct height");
9355 *best_block = BestBlock::new(header.prev_blockhash, new_height)
9358 self.do_chain_event(Some(new_height), |channel| channel.best_block_updated(new_height, header.time, self.chain_hash, &self.node_signer, &self.default_configuration, &&WithChannelContext::from(&self.logger, &channel.context, None)));
9362 impl<M: Deref, T: Deref, ES: Deref, NS: Deref, SP: Deref, F: Deref, R: Deref, L: Deref> chain::Confirm for ChannelManager<M, T, ES, NS, SP, F, R, L>
9364 M::Target: chain::Watch<<SP::Target as SignerProvider>::EcdsaSigner>,
9365 T::Target: BroadcasterInterface,
9366 ES::Target: EntropySource,
9367 NS::Target: NodeSigner,
9368 SP::Target: SignerProvider,
9369 F::Target: FeeEstimator,
9373 fn transactions_confirmed(&self, header: &Header, txdata: &TransactionData, height: u32) {
9374 // Note that we MUST NOT end up calling methods on self.chain_monitor here - we're called
9375 // during initialization prior to the chain_monitor being fully configured in some cases.
9376 // See the docs for `ChannelManagerReadArgs` for more.
9378 let block_hash = header.block_hash();
9379 log_trace!(self.logger, "{} transactions included in block {} at height {} provided", txdata.len(), block_hash, height);
9381 let _persistence_guard =
9382 PersistenceNotifierGuard::optionally_notify_skipping_background_events(
9383 self, || -> NotifyOption { NotifyOption::DoPersist });
9384 self.do_chain_event(Some(height), |channel| channel.transactions_confirmed(&block_hash, height, txdata, self.chain_hash, &self.node_signer, &self.default_configuration, &&WithChannelContext::from(&self.logger, &channel.context, None))
9385 .map(|(a, b)| (a, Vec::new(), b)));
9387 let last_best_block_height = self.best_block.read().unwrap().height;
9388 if height < last_best_block_height {
9389 let timestamp = self.highest_seen_timestamp.load(Ordering::Acquire);
9390 self.do_chain_event(Some(last_best_block_height), |channel| channel.best_block_updated(last_best_block_height, timestamp as u32, self.chain_hash, &self.node_signer, &self.default_configuration, &&WithChannelContext::from(&self.logger, &channel.context, None)));
9394 fn best_block_updated(&self, header: &Header, height: u32) {
9395 // Note that we MUST NOT end up calling methods on self.chain_monitor here - we're called
9396 // during initialization prior to the chain_monitor being fully configured in some cases.
9397 // See the docs for `ChannelManagerReadArgs` for more.
9399 let block_hash = header.block_hash();
9400 log_trace!(self.logger, "New best block: {} at height {}", block_hash, height);
9402 let _persistence_guard =
9403 PersistenceNotifierGuard::optionally_notify_skipping_background_events(
9404 self, || -> NotifyOption { NotifyOption::DoPersist });
9405 *self.best_block.write().unwrap() = BestBlock::new(block_hash, height);
9407 self.do_chain_event(Some(height), |channel| channel.best_block_updated(height, header.time, self.chain_hash, &self.node_signer, &self.default_configuration, &&WithChannelContext::from(&self.logger, &channel.context, None)));
9409 macro_rules! max_time {
9410 ($timestamp: expr) => {
9412 // Update $timestamp to be the max of its current value and the block
9413 // timestamp. This should keep us close to the current time without relying on
9414 // having an explicit local time source.
9415 // Just in case we end up in a race, we loop until we either successfully
9416 // update $timestamp or decide we don't need to.
9417 let old_serial = $timestamp.load(Ordering::Acquire);
9418 if old_serial >= header.time as usize { break; }
9419 if $timestamp.compare_exchange(old_serial, header.time as usize, Ordering::AcqRel, Ordering::Relaxed).is_ok() {
9425 max_time!(self.highest_seen_timestamp);
9426 let mut payment_secrets = self.pending_inbound_payments.lock().unwrap();
9427 payment_secrets.retain(|_, inbound_payment| {
9428 inbound_payment.expiry_time > header.time as u64
9432 fn get_relevant_txids(&self) -> Vec<(Txid, u32, Option<BlockHash>)> {
9433 let mut res = Vec::with_capacity(self.short_to_chan_info.read().unwrap().len());
9434 for (_cp_id, peer_state_mutex) in self.per_peer_state.read().unwrap().iter() {
9435 let mut peer_state_lock = peer_state_mutex.lock().unwrap();
9436 let peer_state = &mut *peer_state_lock;
9437 for chan in peer_state.channel_by_id.values().filter_map(|phase| if let ChannelPhase::Funded(chan) = phase { Some(chan) } else { None }) {
9438 let txid_opt = chan.context.get_funding_txo();
9439 let height_opt = chan.context.get_funding_tx_confirmation_height();
9440 let hash_opt = chan.context.get_funding_tx_confirmed_in();
9441 if let (Some(funding_txo), Some(conf_height), Some(block_hash)) = (txid_opt, height_opt, hash_opt) {
9442 res.push((funding_txo.txid, conf_height, Some(block_hash)));
9449 fn transaction_unconfirmed(&self, txid: &Txid) {
9450 let _persistence_guard =
9451 PersistenceNotifierGuard::optionally_notify_skipping_background_events(
9452 self, || -> NotifyOption { NotifyOption::DoPersist });
9453 self.do_chain_event(None, |channel| {
9454 if let Some(funding_txo) = channel.context.get_funding_txo() {
9455 if funding_txo.txid == *txid {
9456 channel.funding_transaction_unconfirmed(&&WithChannelContext::from(&self.logger, &channel.context, None)).map(|()| (None, Vec::new(), None))
9457 } else { Ok((None, Vec::new(), None)) }
9458 } else { Ok((None, Vec::new(), None)) }
9463 impl<M: Deref, T: Deref, ES: Deref, NS: Deref, SP: Deref, F: Deref, R: Deref, L: Deref> ChannelManager<M, T, ES, NS, SP, F, R, L>
9465 M::Target: chain::Watch<<SP::Target as SignerProvider>::EcdsaSigner>,
9466 T::Target: BroadcasterInterface,
9467 ES::Target: EntropySource,
9468 NS::Target: NodeSigner,
9469 SP::Target: SignerProvider,
9470 F::Target: FeeEstimator,
9474 /// Calls a function which handles an on-chain event (blocks dis/connected, transactions
9475 /// un/confirmed, etc) on each channel, handling any resulting errors or messages generated by
9477 fn do_chain_event<FN: Fn(&mut Channel<SP>) -> Result<(Option<msgs::ChannelReady>, Vec<(HTLCSource, PaymentHash)>, Option<msgs::AnnouncementSignatures>), ClosureReason>>
9478 (&self, height_opt: Option<u32>, f: FN) {
9479 // Note that we MUST NOT end up calling methods on self.chain_monitor here - we're called
9480 // during initialization prior to the chain_monitor being fully configured in some cases.
9481 // See the docs for `ChannelManagerReadArgs` for more.
9483 let mut failed_channels = Vec::new();
9484 let mut timed_out_htlcs = Vec::new();
9486 let per_peer_state = self.per_peer_state.read().unwrap();
9487 for (_cp_id, peer_state_mutex) in per_peer_state.iter() {
9488 let mut peer_state_lock = peer_state_mutex.lock().unwrap();
9489 let peer_state = &mut *peer_state_lock;
9490 let pending_msg_events = &mut peer_state.pending_msg_events;
9492 peer_state.channel_by_id.retain(|_, phase| {
9494 // Retain unfunded channels.
9495 ChannelPhase::UnfundedOutboundV1(_) | ChannelPhase::UnfundedInboundV1(_) => true,
9496 // TODO(dual_funding): Combine this match arm with above.
9497 #[cfg(any(dual_funding, splicing))]
9498 ChannelPhase::UnfundedOutboundV2(_) | ChannelPhase::UnfundedInboundV2(_) => true,
9499 ChannelPhase::Funded(channel) => {
9500 let res = f(channel);
9501 if let Ok((channel_ready_opt, mut timed_out_pending_htlcs, announcement_sigs)) = res {
9502 for (source, payment_hash) in timed_out_pending_htlcs.drain(..) {
9503 let (failure_code, data) = self.get_htlc_inbound_temp_fail_err_and_data(0x1000|14 /* expiry_too_soon */, &channel);
9504 timed_out_htlcs.push((source, payment_hash, HTLCFailReason::reason(failure_code, data),
9505 HTLCDestination::NextHopChannel { node_id: Some(channel.context.get_counterparty_node_id()), channel_id: channel.context.channel_id() }));
9507 let logger = WithChannelContext::from(&self.logger, &channel.context, None);
9508 if let Some(channel_ready) = channel_ready_opt {
9509 send_channel_ready!(self, pending_msg_events, channel, channel_ready);
9510 if channel.context.is_usable() {
9511 log_trace!(logger, "Sending channel_ready with private initial channel_update for our counterparty on channel {}", channel.context.channel_id());
9512 if let Ok(msg) = self.get_channel_update_for_unicast(channel) {
9513 pending_msg_events.push(events::MessageSendEvent::SendChannelUpdate {
9514 node_id: channel.context.get_counterparty_node_id(),
9519 log_trace!(logger, "Sending channel_ready WITHOUT channel_update for {}", channel.context.channel_id());
9524 let mut pending_events = self.pending_events.lock().unwrap();
9525 emit_channel_ready_event!(pending_events, channel);
9528 if let Some(announcement_sigs) = announcement_sigs {
9529 log_trace!(logger, "Sending announcement_signatures for channel {}", channel.context.channel_id());
9530 pending_msg_events.push(events::MessageSendEvent::SendAnnouncementSignatures {
9531 node_id: channel.context.get_counterparty_node_id(),
9532 msg: announcement_sigs,
9534 if let Some(height) = height_opt {
9535 if let Some(announcement) = channel.get_signed_channel_announcement(&self.node_signer, self.chain_hash, height, &self.default_configuration) {
9536 pending_msg_events.push(events::MessageSendEvent::BroadcastChannelAnnouncement {
9538 // Note that announcement_signatures fails if the channel cannot be announced,
9539 // so get_channel_update_for_broadcast will never fail by the time we get here.
9540 update_msg: Some(self.get_channel_update_for_broadcast(channel).unwrap()),
9545 if channel.is_our_channel_ready() {
9546 if let Some(real_scid) = channel.context.get_short_channel_id() {
9547 // If we sent a 0conf channel_ready, and now have an SCID, we add it
9548 // to the short_to_chan_info map here. Note that we check whether we
9549 // can relay using the real SCID at relay-time (i.e.
9550 // enforce option_scid_alias then), and if the funding tx is ever
9551 // un-confirmed we force-close the channel, ensuring short_to_chan_info
9552 // is always consistent.
9553 let mut short_to_chan_info = self.short_to_chan_info.write().unwrap();
9554 let scid_insert = short_to_chan_info.insert(real_scid, (channel.context.get_counterparty_node_id(), channel.context.channel_id()));
9555 assert!(scid_insert.is_none() || scid_insert.unwrap() == (channel.context.get_counterparty_node_id(), channel.context.channel_id()),
9556 "SCIDs should never collide - ensure you weren't behind by a full {} blocks when creating channels",
9557 fake_scid::MAX_SCID_BLOCKS_FROM_NOW);
9560 } else if let Err(reason) = res {
9561 update_maps_on_chan_removal!(self, &channel.context);
9562 // It looks like our counterparty went on-chain or funding transaction was
9563 // reorged out of the main chain. Close the channel.
9564 let reason_message = format!("{}", reason);
9565 failed_channels.push(channel.context.force_shutdown(true, reason));
9566 if let Ok(update) = self.get_channel_update_for_broadcast(&channel) {
9567 let mut pending_broadcast_messages = self.pending_broadcast_messages.lock().unwrap();
9568 pending_broadcast_messages.push(events::MessageSendEvent::BroadcastChannelUpdate {
9572 pending_msg_events.push(events::MessageSendEvent::HandleError {
9573 node_id: channel.context.get_counterparty_node_id(),
9574 action: msgs::ErrorAction::DisconnectPeer {
9575 msg: Some(msgs::ErrorMessage {
9576 channel_id: channel.context.channel_id(),
9577 data: reason_message,
9590 if let Some(height) = height_opt {
9591 self.claimable_payments.lock().unwrap().claimable_payments.retain(|payment_hash, payment| {
9592 payment.htlcs.retain(|htlc| {
9593 // If height is approaching the number of blocks we think it takes us to get
9594 // our commitment transaction confirmed before the HTLC expires, plus the
9595 // number of blocks we generally consider it to take to do a commitment update,
9596 // just give up on it and fail the HTLC.
9597 if height >= htlc.cltv_expiry - HTLC_FAIL_BACK_BUFFER {
9598 let mut htlc_msat_height_data = htlc.value.to_be_bytes().to_vec();
9599 htlc_msat_height_data.extend_from_slice(&height.to_be_bytes());
9601 timed_out_htlcs.push((HTLCSource::PreviousHopData(htlc.prev_hop.clone()), payment_hash.clone(),
9602 HTLCFailReason::reason(0x4000 | 15, htlc_msat_height_data),
9603 HTLCDestination::FailedPayment { payment_hash: payment_hash.clone() }));
9607 !payment.htlcs.is_empty() // Only retain this entry if htlcs has at least one entry.
9610 let mut intercepted_htlcs = self.pending_intercepted_htlcs.lock().unwrap();
9611 intercepted_htlcs.retain(|_, htlc| {
9612 if height >= htlc.forward_info.outgoing_cltv_value - HTLC_FAIL_BACK_BUFFER {
9613 let prev_hop_data = HTLCSource::PreviousHopData(HTLCPreviousHopData {
9614 short_channel_id: htlc.prev_short_channel_id,
9615 user_channel_id: Some(htlc.prev_user_channel_id),
9616 htlc_id: htlc.prev_htlc_id,
9617 incoming_packet_shared_secret: htlc.forward_info.incoming_shared_secret,
9618 phantom_shared_secret: None,
9619 outpoint: htlc.prev_funding_outpoint,
9620 channel_id: htlc.prev_channel_id,
9621 blinded_failure: htlc.forward_info.routing.blinded_failure(),
9624 let requested_forward_scid /* intercept scid */ = match htlc.forward_info.routing {
9625 PendingHTLCRouting::Forward { short_channel_id, .. } => short_channel_id,
9626 _ => unreachable!(),
9628 timed_out_htlcs.push((prev_hop_data, htlc.forward_info.payment_hash,
9629 HTLCFailReason::from_failure_code(0x2000 | 2),
9630 HTLCDestination::InvalidForward { requested_forward_scid }));
9631 let logger = WithContext::from(
9632 &self.logger, None, Some(htlc.prev_channel_id), Some(htlc.forward_info.payment_hash)
9634 log_trace!(logger, "Timing out intercepted HTLC with requested forward scid {}", requested_forward_scid);
9640 self.handle_init_event_channel_failures(failed_channels);
9642 for (source, payment_hash, reason, destination) in timed_out_htlcs.drain(..) {
9643 self.fail_htlc_backwards_internal(&source, &payment_hash, &reason, destination);
9647 /// Gets a [`Future`] that completes when this [`ChannelManager`] may need to be persisted or
9648 /// may have events that need processing.
9650 /// In order to check if this [`ChannelManager`] needs persisting, call
9651 /// [`Self::get_and_clear_needs_persistence`].
9653 /// Note that callbacks registered on the [`Future`] MUST NOT call back into this
9654 /// [`ChannelManager`] and should instead register actions to be taken later.
9655 pub fn get_event_or_persistence_needed_future(&self) -> Future {
9656 self.event_persist_notifier.get_future()
9659 /// Returns true if this [`ChannelManager`] needs to be persisted.
9661 /// See [`Self::get_event_or_persistence_needed_future`] for retrieving a [`Future`] that
9662 /// indicates this should be checked.
9663 pub fn get_and_clear_needs_persistence(&self) -> bool {
9664 self.needs_persist_flag.swap(false, Ordering::AcqRel)
9667 #[cfg(any(test, feature = "_test_utils"))]
9668 pub fn get_event_or_persist_condvar_value(&self) -> bool {
9669 self.event_persist_notifier.notify_pending()
9672 /// Gets the latest best block which was connected either via the [`chain::Listen`] or
9673 /// [`chain::Confirm`] interfaces.
9674 pub fn current_best_block(&self) -> BestBlock {
9675 self.best_block.read().unwrap().clone()
9678 /// Fetches the set of [`NodeFeatures`] flags that are provided by or required by
9679 /// [`ChannelManager`].
9680 pub fn node_features(&self) -> NodeFeatures {
9681 provided_node_features(&self.default_configuration)
9684 /// Fetches the set of [`Bolt11InvoiceFeatures`] flags that are provided by or required by
9685 /// [`ChannelManager`].
9687 /// Note that the invoice feature flags can vary depending on if the invoice is a "phantom invoice"
9688 /// or not. Thus, this method is not public.
9689 #[cfg(any(feature = "_test_utils", test))]
9690 pub fn bolt11_invoice_features(&self) -> Bolt11InvoiceFeatures {
9691 provided_bolt11_invoice_features(&self.default_configuration)
9694 /// Fetches the set of [`Bolt12InvoiceFeatures`] flags that are provided by or required by
9695 /// [`ChannelManager`].
9696 fn bolt12_invoice_features(&self) -> Bolt12InvoiceFeatures {
9697 provided_bolt12_invoice_features(&self.default_configuration)
9700 /// Fetches the set of [`ChannelFeatures`] flags that are provided by or required by
9701 /// [`ChannelManager`].
9702 pub fn channel_features(&self) -> ChannelFeatures {
9703 provided_channel_features(&self.default_configuration)
9706 /// Fetches the set of [`ChannelTypeFeatures`] flags that are provided by or required by
9707 /// [`ChannelManager`].
9708 pub fn channel_type_features(&self) -> ChannelTypeFeatures {
9709 provided_channel_type_features(&self.default_configuration)
9712 /// Fetches the set of [`InitFeatures`] flags that are provided by or required by
9713 /// [`ChannelManager`].
9714 pub fn init_features(&self) -> InitFeatures {
9715 provided_init_features(&self.default_configuration)
9719 impl<M: Deref, T: Deref, ES: Deref, NS: Deref, SP: Deref, F: Deref, R: Deref, L: Deref>
9720 ChannelMessageHandler for ChannelManager<M, T, ES, NS, SP, F, R, L>
9722 M::Target: chain::Watch<<SP::Target as SignerProvider>::EcdsaSigner>,
9723 T::Target: BroadcasterInterface,
9724 ES::Target: EntropySource,
9725 NS::Target: NodeSigner,
9726 SP::Target: SignerProvider,
9727 F::Target: FeeEstimator,
9731 fn handle_open_channel(&self, counterparty_node_id: &PublicKey, msg: &msgs::OpenChannel) {
9732 // Note that we never need to persist the updated ChannelManager for an inbound
9733 // open_channel message - pre-funded channels are never written so there should be no
9734 // change to the contents.
9735 let _persistence_guard = PersistenceNotifierGuard::optionally_notify(self, || {
9736 let res = self.internal_open_channel(counterparty_node_id, msg);
9737 let persist = match &res {
9738 Err(e) if e.closes_channel() => {
9739 debug_assert!(false, "We shouldn't close a new channel");
9740 NotifyOption::DoPersist
9742 _ => NotifyOption::SkipPersistHandleEvents,
9744 let _ = handle_error!(self, res, *counterparty_node_id);
9749 fn handle_open_channel_v2(&self, counterparty_node_id: &PublicKey, msg: &msgs::OpenChannelV2) {
9750 let _: Result<(), _> = handle_error!(self, Err(MsgHandleErrInternal::send_err_msg_no_close(
9751 "Dual-funded channels not supported".to_owned(),
9752 msg.common_fields.temporary_channel_id.clone())), *counterparty_node_id);
9755 fn handle_accept_channel(&self, counterparty_node_id: &PublicKey, msg: &msgs::AcceptChannel) {
9756 // Note that we never need to persist the updated ChannelManager for an inbound
9757 // accept_channel message - pre-funded channels are never written so there should be no
9758 // change to the contents.
9759 let _persistence_guard = PersistenceNotifierGuard::optionally_notify(self, || {
9760 let _ = handle_error!(self, self.internal_accept_channel(counterparty_node_id, msg), *counterparty_node_id);
9761 NotifyOption::SkipPersistHandleEvents
9765 fn handle_accept_channel_v2(&self, counterparty_node_id: &PublicKey, msg: &msgs::AcceptChannelV2) {
9766 let _: Result<(), _> = handle_error!(self, Err(MsgHandleErrInternal::send_err_msg_no_close(
9767 "Dual-funded channels not supported".to_owned(),
9768 msg.common_fields.temporary_channel_id.clone())), *counterparty_node_id);
9771 fn handle_funding_created(&self, counterparty_node_id: &PublicKey, msg: &msgs::FundingCreated) {
9772 let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
9773 let _ = handle_error!(self, self.internal_funding_created(counterparty_node_id, msg), *counterparty_node_id);
9776 fn handle_funding_signed(&self, counterparty_node_id: &PublicKey, msg: &msgs::FundingSigned) {
9777 let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
9778 let _ = handle_error!(self, self.internal_funding_signed(counterparty_node_id, msg), *counterparty_node_id);
9781 fn handle_channel_ready(&self, counterparty_node_id: &PublicKey, msg: &msgs::ChannelReady) {
9782 // Note that we never need to persist the updated ChannelManager for an inbound
9783 // channel_ready message - while the channel's state will change, any channel_ready message
9784 // will ultimately be re-sent on startup and the `ChannelMonitor` won't be updated so we
9785 // will not force-close the channel on startup.
9786 let _persistence_guard = PersistenceNotifierGuard::optionally_notify(self, || {
9787 let res = self.internal_channel_ready(counterparty_node_id, msg);
9788 let persist = match &res {
9789 Err(e) if e.closes_channel() => NotifyOption::DoPersist,
9790 _ => NotifyOption::SkipPersistHandleEvents,
9792 let _ = handle_error!(self, res, *counterparty_node_id);
9797 fn handle_stfu(&self, counterparty_node_id: &PublicKey, msg: &msgs::Stfu) {
9798 let _: Result<(), _> = handle_error!(self, Err(MsgHandleErrInternal::send_err_msg_no_close(
9799 "Quiescence not supported".to_owned(),
9800 msg.channel_id.clone())), *counterparty_node_id);
9804 fn handle_splice(&self, counterparty_node_id: &PublicKey, msg: &msgs::Splice) {
9805 let _: Result<(), _> = handle_error!(self, Err(MsgHandleErrInternal::send_err_msg_no_close(
9806 "Splicing not supported".to_owned(),
9807 msg.channel_id.clone())), *counterparty_node_id);
9811 fn handle_splice_ack(&self, counterparty_node_id: &PublicKey, msg: &msgs::SpliceAck) {
9812 let _: Result<(), _> = handle_error!(self, Err(MsgHandleErrInternal::send_err_msg_no_close(
9813 "Splicing not supported (splice_ack)".to_owned(),
9814 msg.channel_id.clone())), *counterparty_node_id);
9818 fn handle_splice_locked(&self, counterparty_node_id: &PublicKey, msg: &msgs::SpliceLocked) {
9819 let _: Result<(), _> = handle_error!(self, Err(MsgHandleErrInternal::send_err_msg_no_close(
9820 "Splicing not supported (splice_locked)".to_owned(),
9821 msg.channel_id.clone())), *counterparty_node_id);
9824 fn handle_shutdown(&self, counterparty_node_id: &PublicKey, msg: &msgs::Shutdown) {
9825 let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
9826 let _ = handle_error!(self, self.internal_shutdown(counterparty_node_id, msg), *counterparty_node_id);
9829 fn handle_closing_signed(&self, counterparty_node_id: &PublicKey, msg: &msgs::ClosingSigned) {
9830 let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
9831 let _ = handle_error!(self, self.internal_closing_signed(counterparty_node_id, msg), *counterparty_node_id);
9834 fn handle_update_add_htlc(&self, counterparty_node_id: &PublicKey, msg: &msgs::UpdateAddHTLC) {
9835 // Note that we never need to persist the updated ChannelManager for an inbound
9836 // update_add_htlc message - the message itself doesn't change our channel state only the
9837 // `commitment_signed` message afterwards will.
9838 let _persistence_guard = PersistenceNotifierGuard::optionally_notify(self, || {
9839 let res = self.internal_update_add_htlc(counterparty_node_id, msg);
9840 let persist = match &res {
9841 Err(e) if e.closes_channel() => NotifyOption::DoPersist,
9842 Err(_) => NotifyOption::SkipPersistHandleEvents,
9843 Ok(()) => NotifyOption::SkipPersistNoEvents,
9845 let _ = handle_error!(self, res, *counterparty_node_id);
9850 fn handle_update_fulfill_htlc(&self, counterparty_node_id: &PublicKey, msg: &msgs::UpdateFulfillHTLC) {
9851 let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
9852 let _ = handle_error!(self, self.internal_update_fulfill_htlc(counterparty_node_id, msg), *counterparty_node_id);
9855 fn handle_update_fail_htlc(&self, counterparty_node_id: &PublicKey, msg: &msgs::UpdateFailHTLC) {
9856 // Note that we never need to persist the updated ChannelManager for an inbound
9857 // update_fail_htlc message - the message itself doesn't change our channel state only the
9858 // `commitment_signed` message afterwards will.
9859 let _persistence_guard = PersistenceNotifierGuard::optionally_notify(self, || {
9860 let res = self.internal_update_fail_htlc(counterparty_node_id, msg);
9861 let persist = match &res {
9862 Err(e) if e.closes_channel() => NotifyOption::DoPersist,
9863 Err(_) => NotifyOption::SkipPersistHandleEvents,
9864 Ok(()) => NotifyOption::SkipPersistNoEvents,
9866 let _ = handle_error!(self, res, *counterparty_node_id);
9871 fn handle_update_fail_malformed_htlc(&self, counterparty_node_id: &PublicKey, msg: &msgs::UpdateFailMalformedHTLC) {
9872 // Note that we never need to persist the updated ChannelManager for an inbound
9873 // update_fail_malformed_htlc message - the message itself doesn't change our channel state
9874 // only the `commitment_signed` message afterwards will.
9875 let _persistence_guard = PersistenceNotifierGuard::optionally_notify(self, || {
9876 let res = self.internal_update_fail_malformed_htlc(counterparty_node_id, msg);
9877 let persist = match &res {
9878 Err(e) if e.closes_channel() => NotifyOption::DoPersist,
9879 Err(_) => NotifyOption::SkipPersistHandleEvents,
9880 Ok(()) => NotifyOption::SkipPersistNoEvents,
9882 let _ = handle_error!(self, res, *counterparty_node_id);
9887 fn handle_commitment_signed(&self, counterparty_node_id: &PublicKey, msg: &msgs::CommitmentSigned) {
9888 let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
9889 let _ = handle_error!(self, self.internal_commitment_signed(counterparty_node_id, msg), *counterparty_node_id);
9892 fn handle_revoke_and_ack(&self, counterparty_node_id: &PublicKey, msg: &msgs::RevokeAndACK) {
9893 let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
9894 let _ = handle_error!(self, self.internal_revoke_and_ack(counterparty_node_id, msg), *counterparty_node_id);
9897 fn handle_update_fee(&self, counterparty_node_id: &PublicKey, msg: &msgs::UpdateFee) {
9898 // Note that we never need to persist the updated ChannelManager for an inbound
9899 // update_fee message - the message itself doesn't change our channel state only the
9900 // `commitment_signed` message afterwards will.
9901 let _persistence_guard = PersistenceNotifierGuard::optionally_notify(self, || {
9902 let res = self.internal_update_fee(counterparty_node_id, msg);
9903 let persist = match &res {
9904 Err(e) if e.closes_channel() => NotifyOption::DoPersist,
9905 Err(_) => NotifyOption::SkipPersistHandleEvents,
9906 Ok(()) => NotifyOption::SkipPersistNoEvents,
9908 let _ = handle_error!(self, res, *counterparty_node_id);
9913 fn handle_announcement_signatures(&self, counterparty_node_id: &PublicKey, msg: &msgs::AnnouncementSignatures) {
9914 let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
9915 let _ = handle_error!(self, self.internal_announcement_signatures(counterparty_node_id, msg), *counterparty_node_id);
9918 fn handle_channel_update(&self, counterparty_node_id: &PublicKey, msg: &msgs::ChannelUpdate) {
9919 PersistenceNotifierGuard::optionally_notify(self, || {
9920 if let Ok(persist) = handle_error!(self, self.internal_channel_update(counterparty_node_id, msg), *counterparty_node_id) {
9923 NotifyOption::DoPersist
9928 fn handle_channel_reestablish(&self, counterparty_node_id: &PublicKey, msg: &msgs::ChannelReestablish) {
9929 let _persistence_guard = PersistenceNotifierGuard::optionally_notify(self, || {
9930 let res = self.internal_channel_reestablish(counterparty_node_id, msg);
9931 let persist = match &res {
9932 Err(e) if e.closes_channel() => NotifyOption::DoPersist,
9933 Err(_) => NotifyOption::SkipPersistHandleEvents,
9934 Ok(persist) => *persist,
9936 let _ = handle_error!(self, res, *counterparty_node_id);
9941 fn peer_disconnected(&self, counterparty_node_id: &PublicKey) {
9942 let _persistence_guard = PersistenceNotifierGuard::optionally_notify(
9943 self, || NotifyOption::SkipPersistHandleEvents);
9944 let mut failed_channels = Vec::new();
9945 let mut per_peer_state = self.per_peer_state.write().unwrap();
9948 WithContext::from(&self.logger, Some(*counterparty_node_id), None, None),
9949 "Marking channels with {} disconnected and generating channel_updates.",
9950 log_pubkey!(counterparty_node_id)
9952 if let Some(peer_state_mutex) = per_peer_state.get(counterparty_node_id) {
9953 let mut peer_state_lock = peer_state_mutex.lock().unwrap();
9954 let peer_state = &mut *peer_state_lock;
9955 let pending_msg_events = &mut peer_state.pending_msg_events;
9956 peer_state.channel_by_id.retain(|_, phase| {
9957 let context = match phase {
9958 ChannelPhase::Funded(chan) => {
9959 let logger = WithChannelContext::from(&self.logger, &chan.context, None);
9960 if chan.remove_uncommitted_htlcs_and_mark_paused(&&logger).is_ok() {
9961 // We only retain funded channels that are not shutdown.
9966 // If we get disconnected and haven't yet committed to a funding
9967 // transaction, we can replay the `open_channel` on reconnection, so don't
9968 // bother dropping the channel here. However, if we already committed to
9969 // the funding transaction we don't yet support replaying the funding
9970 // handshake (and bailing if the peer rejects it), so we force-close in
9972 ChannelPhase::UnfundedOutboundV1(chan) if chan.is_resumable() => return true,
9973 ChannelPhase::UnfundedOutboundV1(chan) => &mut chan.context,
9974 // Unfunded inbound channels will always be removed.
9975 ChannelPhase::UnfundedInboundV1(chan) => {
9978 #[cfg(any(dual_funding, splicing))]
9979 ChannelPhase::UnfundedOutboundV2(chan) => {
9982 #[cfg(any(dual_funding, splicing))]
9983 ChannelPhase::UnfundedInboundV2(chan) => {
9987 // Clean up for removal.
9988 update_maps_on_chan_removal!(self, &context);
9989 failed_channels.push(context.force_shutdown(false, ClosureReason::DisconnectedPeer));
9992 // Note that we don't bother generating any events for pre-accept channels -
9993 // they're not considered "channels" yet from the PoV of our events interface.
9994 peer_state.inbound_channel_request_by_id.clear();
9995 pending_msg_events.retain(|msg| {
9997 // V1 Channel Establishment
9998 &events::MessageSendEvent::SendAcceptChannel { .. } => false,
9999 &events::MessageSendEvent::SendOpenChannel { .. } => false,
10000 &events::MessageSendEvent::SendFundingCreated { .. } => false,
10001 &events::MessageSendEvent::SendFundingSigned { .. } => false,
10002 // V2 Channel Establishment
10003 &events::MessageSendEvent::SendAcceptChannelV2 { .. } => false,
10004 &events::MessageSendEvent::SendOpenChannelV2 { .. } => false,
10005 // Common Channel Establishment
10006 &events::MessageSendEvent::SendChannelReady { .. } => false,
10007 &events::MessageSendEvent::SendAnnouncementSignatures { .. } => false,
10009 &events::MessageSendEvent::SendStfu { .. } => false,
10011 &events::MessageSendEvent::SendSplice { .. } => false,
10012 &events::MessageSendEvent::SendSpliceAck { .. } => false,
10013 &events::MessageSendEvent::SendSpliceLocked { .. } => false,
10014 // Interactive Transaction Construction
10015 &events::MessageSendEvent::SendTxAddInput { .. } => false,
10016 &events::MessageSendEvent::SendTxAddOutput { .. } => false,
10017 &events::MessageSendEvent::SendTxRemoveInput { .. } => false,
10018 &events::MessageSendEvent::SendTxRemoveOutput { .. } => false,
10019 &events::MessageSendEvent::SendTxComplete { .. } => false,
10020 &events::MessageSendEvent::SendTxSignatures { .. } => false,
10021 &events::MessageSendEvent::SendTxInitRbf { .. } => false,
10022 &events::MessageSendEvent::SendTxAckRbf { .. } => false,
10023 &events::MessageSendEvent::SendTxAbort { .. } => false,
10024 // Channel Operations
10025 &events::MessageSendEvent::UpdateHTLCs { .. } => false,
10026 &events::MessageSendEvent::SendRevokeAndACK { .. } => false,
10027 &events::MessageSendEvent::SendClosingSigned { .. } => false,
10028 &events::MessageSendEvent::SendShutdown { .. } => false,
10029 &events::MessageSendEvent::SendChannelReestablish { .. } => false,
10030 &events::MessageSendEvent::HandleError { .. } => false,
10032 &events::MessageSendEvent::SendChannelAnnouncement { .. } => false,
10033 &events::MessageSendEvent::BroadcastChannelAnnouncement { .. } => true,
10034 // [`ChannelManager::pending_broadcast_events`] holds the [`BroadcastChannelUpdate`]
10035 // This check here is to ensure exhaustivity.
10036 &events::MessageSendEvent::BroadcastChannelUpdate { .. } => {
10037 debug_assert!(false, "This event shouldn't have been here");
10040 &events::MessageSendEvent::BroadcastNodeAnnouncement { .. } => true,
10041 &events::MessageSendEvent::SendChannelUpdate { .. } => false,
10042 &events::MessageSendEvent::SendChannelRangeQuery { .. } => false,
10043 &events::MessageSendEvent::SendShortIdsQuery { .. } => false,
10044 &events::MessageSendEvent::SendReplyChannelRange { .. } => false,
10045 &events::MessageSendEvent::SendGossipTimestampFilter { .. } => false,
10048 debug_assert!(peer_state.is_connected, "A disconnected peer cannot disconnect");
10049 peer_state.is_connected = false;
10050 peer_state.ok_to_remove(true)
10051 } else { debug_assert!(false, "Unconnected peer disconnected"); true }
10054 per_peer_state.remove(counterparty_node_id);
10056 mem::drop(per_peer_state);
10058 for failure in failed_channels.drain(..) {
10059 self.finish_close_channel(failure);
10063 fn peer_connected(&self, counterparty_node_id: &PublicKey, init_msg: &msgs::Init, inbound: bool) -> Result<(), ()> {
10064 let logger = WithContext::from(&self.logger, Some(*counterparty_node_id), None, None);
10065 if !init_msg.features.supports_static_remote_key() {
10066 log_debug!(logger, "Peer {} does not support static remote key, disconnecting", log_pubkey!(counterparty_node_id));
10070 let mut res = Ok(());
10072 PersistenceNotifierGuard::optionally_notify(self, || {
10073 // If we have too many peers connected which don't have funded channels, disconnect the
10074 // peer immediately (as long as it doesn't have funded channels). If we have a bunch of
10075 // unfunded channels taking up space in memory for disconnected peers, we still let new
10076 // peers connect, but we'll reject new channels from them.
10077 let connected_peers_without_funded_channels = self.peers_without_funded_channels(|node| node.is_connected);
10078 let inbound_peer_limited = inbound && connected_peers_without_funded_channels >= MAX_NO_CHANNEL_PEERS;
10081 let mut peer_state_lock = self.per_peer_state.write().unwrap();
10082 match peer_state_lock.entry(counterparty_node_id.clone()) {
10083 hash_map::Entry::Vacant(e) => {
10084 if inbound_peer_limited {
10086 return NotifyOption::SkipPersistNoEvents;
10088 e.insert(Mutex::new(PeerState {
10089 channel_by_id: new_hash_map(),
10090 inbound_channel_request_by_id: new_hash_map(),
10091 latest_features: init_msg.features.clone(),
10092 pending_msg_events: Vec::new(),
10093 in_flight_monitor_updates: BTreeMap::new(),
10094 monitor_update_blocked_actions: BTreeMap::new(),
10095 actions_blocking_raa_monitor_updates: BTreeMap::new(),
10096 is_connected: true,
10099 hash_map::Entry::Occupied(e) => {
10100 let mut peer_state = e.get().lock().unwrap();
10101 peer_state.latest_features = init_msg.features.clone();
10103 let best_block_height = self.best_block.read().unwrap().height;
10104 if inbound_peer_limited &&
10105 Self::unfunded_channel_count(&*peer_state, best_block_height) ==
10106 peer_state.channel_by_id.len()
10109 return NotifyOption::SkipPersistNoEvents;
10112 debug_assert!(!peer_state.is_connected, "A peer shouldn't be connected twice");
10113 peer_state.is_connected = true;
10118 log_debug!(logger, "Generating channel_reestablish events for {}", log_pubkey!(counterparty_node_id));
10120 let per_peer_state = self.per_peer_state.read().unwrap();
10121 if let Some(peer_state_mutex) = per_peer_state.get(counterparty_node_id) {
10122 let mut peer_state_lock = peer_state_mutex.lock().unwrap();
10123 let peer_state = &mut *peer_state_lock;
10124 let pending_msg_events = &mut peer_state.pending_msg_events;
10126 for (_, phase) in peer_state.channel_by_id.iter_mut() {
10128 ChannelPhase::Funded(chan) => {
10129 let logger = WithChannelContext::from(&self.logger, &chan.context, None);
10130 pending_msg_events.push(events::MessageSendEvent::SendChannelReestablish {
10131 node_id: chan.context.get_counterparty_node_id(),
10132 msg: chan.get_channel_reestablish(&&logger),
10136 ChannelPhase::UnfundedOutboundV1(chan) => {
10137 pending_msg_events.push(events::MessageSendEvent::SendOpenChannel {
10138 node_id: chan.context.get_counterparty_node_id(),
10139 msg: chan.get_open_channel(self.chain_hash),
10143 // TODO(dual_funding): Combine this match arm with above once #[cfg(any(dual_funding, splicing))] is removed.
10144 #[cfg(any(dual_funding, splicing))]
10145 ChannelPhase::UnfundedOutboundV2(chan) => {
10146 pending_msg_events.push(events::MessageSendEvent::SendOpenChannelV2 {
10147 node_id: chan.context.get_counterparty_node_id(),
10148 msg: chan.get_open_channel_v2(self.chain_hash),
10152 ChannelPhase::UnfundedInboundV1(_) => {
10153 // Since unfunded inbound channel maps are cleared upon disconnecting a peer,
10154 // they are not persisted and won't be recovered after a crash.
10155 // Therefore, they shouldn't exist at this point.
10156 debug_assert!(false);
10159 // TODO(dual_funding): Combine this match arm with above once #[cfg(any(dual_funding, splicing))] is removed.
10160 #[cfg(any(dual_funding, splicing))]
10161 ChannelPhase::UnfundedInboundV2(channel) => {
10162 // Since unfunded inbound channel maps are cleared upon disconnecting a peer,
10163 // they are not persisted and won't be recovered after a crash.
10164 // Therefore, they shouldn't exist at this point.
10165 debug_assert!(false);
10171 return NotifyOption::SkipPersistHandleEvents;
10172 //TODO: Also re-broadcast announcement_signatures
10177 fn handle_error(&self, counterparty_node_id: &PublicKey, msg: &msgs::ErrorMessage) {
10178 match &msg.data as &str {
10179 "cannot co-op close channel w/ active htlcs"|
10180 "link failed to shutdown" =>
10182 // LND hasn't properly handled shutdown messages ever, and force-closes any time we
10183 // send one while HTLCs are still present. The issue is tracked at
10184 // https://github.com/lightningnetwork/lnd/issues/6039 and has had multiple patches
10185 // to fix it but none so far have managed to land upstream. The issue appears to be
10186 // very low priority for the LND team despite being marked "P1".
10187 // We're not going to bother handling this in a sensible way, instead simply
10188 // repeating the Shutdown message on repeat until morale improves.
10189 if !msg.channel_id.is_zero() {
10190 PersistenceNotifierGuard::optionally_notify(
10192 || -> NotifyOption {
10193 let per_peer_state = self.per_peer_state.read().unwrap();
10194 let peer_state_mutex_opt = per_peer_state.get(counterparty_node_id);
10195 if peer_state_mutex_opt.is_none() { return NotifyOption::SkipPersistNoEvents; }
10196 let mut peer_state = peer_state_mutex_opt.unwrap().lock().unwrap();
10197 if let Some(ChannelPhase::Funded(chan)) = peer_state.channel_by_id.get(&msg.channel_id) {
10198 if let Some(msg) = chan.get_outbound_shutdown() {
10199 peer_state.pending_msg_events.push(events::MessageSendEvent::SendShutdown {
10200 node_id: *counterparty_node_id,
10204 peer_state.pending_msg_events.push(events::MessageSendEvent::HandleError {
10205 node_id: *counterparty_node_id,
10206 action: msgs::ErrorAction::SendWarningMessage {
10207 msg: msgs::WarningMessage {
10208 channel_id: msg.channel_id,
10209 data: "You appear to be exhibiting LND bug 6039, we'll keep sending you shutdown messages until you handle them correctly".to_owned()
10211 log_level: Level::Trace,
10214 // This can happen in a fairly tight loop, so we absolutely cannot trigger
10215 // a `ChannelManager` write here.
10216 return NotifyOption::SkipPersistHandleEvents;
10218 NotifyOption::SkipPersistNoEvents
10227 let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
10229 if msg.channel_id.is_zero() {
10230 let channel_ids: Vec<ChannelId> = {
10231 let per_peer_state = self.per_peer_state.read().unwrap();
10232 let peer_state_mutex_opt = per_peer_state.get(counterparty_node_id);
10233 if peer_state_mutex_opt.is_none() { return; }
10234 let mut peer_state_lock = peer_state_mutex_opt.unwrap().lock().unwrap();
10235 let peer_state = &mut *peer_state_lock;
10236 // Note that we don't bother generating any events for pre-accept channels -
10237 // they're not considered "channels" yet from the PoV of our events interface.
10238 peer_state.inbound_channel_request_by_id.clear();
10239 peer_state.channel_by_id.keys().cloned().collect()
10241 for channel_id in channel_ids {
10242 // Untrusted messages from peer, we throw away the error if id points to a non-existent channel
10243 let _ = self.force_close_channel_with_peer(&channel_id, counterparty_node_id, Some(&msg.data), true);
10247 // First check if we can advance the channel type and try again.
10248 let per_peer_state = self.per_peer_state.read().unwrap();
10249 let peer_state_mutex_opt = per_peer_state.get(counterparty_node_id);
10250 if peer_state_mutex_opt.is_none() { return; }
10251 let mut peer_state_lock = peer_state_mutex_opt.unwrap().lock().unwrap();
10252 let peer_state = &mut *peer_state_lock;
10253 match peer_state.channel_by_id.get_mut(&msg.channel_id) {
10254 Some(ChannelPhase::UnfundedOutboundV1(ref mut chan)) => {
10255 if let Ok(msg) = chan.maybe_handle_error_without_close(self.chain_hash, &self.fee_estimator) {
10256 peer_state.pending_msg_events.push(events::MessageSendEvent::SendOpenChannel {
10257 node_id: *counterparty_node_id,
10263 #[cfg(any(dual_funding, splicing))]
10264 Some(ChannelPhase::UnfundedOutboundV2(ref mut chan)) => {
10265 if let Ok(msg) = chan.maybe_handle_error_without_close(self.chain_hash, &self.fee_estimator) {
10266 peer_state.pending_msg_events.push(events::MessageSendEvent::SendOpenChannelV2 {
10267 node_id: *counterparty_node_id,
10273 None | Some(ChannelPhase::UnfundedInboundV1(_) | ChannelPhase::Funded(_)) => (),
10274 #[cfg(any(dual_funding, splicing))]
10275 Some(ChannelPhase::UnfundedInboundV2(_)) => (),
10279 // Untrusted messages from peer, we throw away the error if id points to a non-existent channel
10280 let _ = self.force_close_channel_with_peer(&msg.channel_id, counterparty_node_id, Some(&msg.data), true);
10284 fn provided_node_features(&self) -> NodeFeatures {
10285 provided_node_features(&self.default_configuration)
10288 fn provided_init_features(&self, _their_init_features: &PublicKey) -> InitFeatures {
10289 provided_init_features(&self.default_configuration)
10292 fn get_chain_hashes(&self) -> Option<Vec<ChainHash>> {
10293 Some(vec![self.chain_hash])
10296 fn handle_tx_add_input(&self, counterparty_node_id: &PublicKey, msg: &msgs::TxAddInput) {
10297 let _: Result<(), _> = handle_error!(self, Err(MsgHandleErrInternal::send_err_msg_no_close(
10298 "Dual-funded channels not supported".to_owned(),
10299 msg.channel_id.clone())), *counterparty_node_id);
10302 fn handle_tx_add_output(&self, counterparty_node_id: &PublicKey, msg: &msgs::TxAddOutput) {
10303 let _: Result<(), _> = handle_error!(self, Err(MsgHandleErrInternal::send_err_msg_no_close(
10304 "Dual-funded channels not supported".to_owned(),
10305 msg.channel_id.clone())), *counterparty_node_id);
10308 fn handle_tx_remove_input(&self, counterparty_node_id: &PublicKey, msg: &msgs::TxRemoveInput) {
10309 let _: Result<(), _> = handle_error!(self, Err(MsgHandleErrInternal::send_err_msg_no_close(
10310 "Dual-funded channels not supported".to_owned(),
10311 msg.channel_id.clone())), *counterparty_node_id);
10314 fn handle_tx_remove_output(&self, counterparty_node_id: &PublicKey, msg: &msgs::TxRemoveOutput) {
10315 let _: Result<(), _> = handle_error!(self, Err(MsgHandleErrInternal::send_err_msg_no_close(
10316 "Dual-funded channels not supported".to_owned(),
10317 msg.channel_id.clone())), *counterparty_node_id);
10320 fn handle_tx_complete(&self, counterparty_node_id: &PublicKey, msg: &msgs::TxComplete) {
10321 let _: Result<(), _> = handle_error!(self, Err(MsgHandleErrInternal::send_err_msg_no_close(
10322 "Dual-funded channels not supported".to_owned(),
10323 msg.channel_id.clone())), *counterparty_node_id);
10326 fn handle_tx_signatures(&self, counterparty_node_id: &PublicKey, msg: &msgs::TxSignatures) {
10327 let _: Result<(), _> = handle_error!(self, Err(MsgHandleErrInternal::send_err_msg_no_close(
10328 "Dual-funded channels not supported".to_owned(),
10329 msg.channel_id.clone())), *counterparty_node_id);
10332 fn handle_tx_init_rbf(&self, counterparty_node_id: &PublicKey, msg: &msgs::TxInitRbf) {
10333 let _: Result<(), _> = handle_error!(self, Err(MsgHandleErrInternal::send_err_msg_no_close(
10334 "Dual-funded channels not supported".to_owned(),
10335 msg.channel_id.clone())), *counterparty_node_id);
10338 fn handle_tx_ack_rbf(&self, counterparty_node_id: &PublicKey, msg: &msgs::TxAckRbf) {
10339 let _: Result<(), _> = handle_error!(self, Err(MsgHandleErrInternal::send_err_msg_no_close(
10340 "Dual-funded channels not supported".to_owned(),
10341 msg.channel_id.clone())), *counterparty_node_id);
10344 fn handle_tx_abort(&self, counterparty_node_id: &PublicKey, msg: &msgs::TxAbort) {
10345 let _: Result<(), _> = handle_error!(self, Err(MsgHandleErrInternal::send_err_msg_no_close(
10346 "Dual-funded channels not supported".to_owned(),
10347 msg.channel_id.clone())), *counterparty_node_id);
10351 impl<M: Deref, T: Deref, ES: Deref, NS: Deref, SP: Deref, F: Deref, R: Deref, L: Deref>
10352 OffersMessageHandler for ChannelManager<M, T, ES, NS, SP, F, R, L>
10354 M::Target: chain::Watch<<SP::Target as SignerProvider>::EcdsaSigner>,
10355 T::Target: BroadcasterInterface,
10356 ES::Target: EntropySource,
10357 NS::Target: NodeSigner,
10358 SP::Target: SignerProvider,
10359 F::Target: FeeEstimator,
10363 fn handle_message(&self, message: OffersMessage, responder: Option<Responder>) -> ResponseInstruction<OffersMessage> {
10364 let secp_ctx = &self.secp_ctx;
10365 let expanded_key = &self.inbound_payment_key;
10368 OffersMessage::InvoiceRequest(invoice_request) => {
10369 let responder = match responder {
10370 Some(responder) => responder,
10371 None => return ResponseInstruction::NoResponse,
10373 let amount_msats = match InvoiceBuilder::<DerivedSigningPubkey>::amount_msats(
10376 Ok(amount_msats) => amount_msats,
10377 Err(error) => return responder.respond(OffersMessage::InvoiceError(error.into())),
10379 let invoice_request = match invoice_request.verify(expanded_key, secp_ctx) {
10380 Ok(invoice_request) => invoice_request,
10382 let error = Bolt12SemanticError::InvalidMetadata;
10383 return responder.respond(OffersMessage::InvoiceError(error.into()));
10387 let relative_expiry = DEFAULT_RELATIVE_EXPIRY.as_secs() as u32;
10388 let (payment_hash, payment_secret) = match self.create_inbound_payment(
10389 Some(amount_msats), relative_expiry, None
10391 Ok((payment_hash, payment_secret)) => (payment_hash, payment_secret),
10393 let error = Bolt12SemanticError::InvalidAmount;
10394 return responder.respond(OffersMessage::InvoiceError(error.into()));
10398 let payment_context = PaymentContext::Bolt12Offer(Bolt12OfferContext {
10399 offer_id: invoice_request.offer_id,
10400 invoice_request: invoice_request.fields(),
10402 let payment_paths = match self.create_blinded_payment_paths(
10403 amount_msats, payment_secret, payment_context
10405 Ok(payment_paths) => payment_paths,
10407 let error = Bolt12SemanticError::MissingPaths;
10408 return responder.respond(OffersMessage::InvoiceError(error.into()));
10412 #[cfg(not(feature = "std"))]
10413 let created_at = Duration::from_secs(
10414 self.highest_seen_timestamp.load(Ordering::Acquire) as u64
10417 let response = if invoice_request.keys.is_some() {
10418 #[cfg(feature = "std")]
10419 let builder = invoice_request.respond_using_derived_keys(
10420 payment_paths, payment_hash
10422 #[cfg(not(feature = "std"))]
10423 let builder = invoice_request.respond_using_derived_keys_no_std(
10424 payment_paths, payment_hash, created_at
10427 .map(InvoiceBuilder::<DerivedSigningPubkey>::from)
10428 .and_then(|builder| builder.allow_mpp().build_and_sign(secp_ctx))
10429 .map_err(InvoiceError::from)
10431 #[cfg(feature = "std")]
10432 let builder = invoice_request.respond_with(payment_paths, payment_hash);
10433 #[cfg(not(feature = "std"))]
10434 let builder = invoice_request.respond_with_no_std(
10435 payment_paths, payment_hash, created_at
10438 .map(InvoiceBuilder::<ExplicitSigningPubkey>::from)
10439 .and_then(|builder| builder.allow_mpp().build())
10440 .map_err(InvoiceError::from)
10441 .and_then(|invoice| {
10443 let mut invoice = invoice;
10445 .sign(|invoice: &UnsignedBolt12Invoice|
10446 self.node_signer.sign_bolt12_invoice(invoice)
10448 .map_err(InvoiceError::from)
10453 Ok(invoice) => return responder.respond(OffersMessage::Invoice(invoice)),
10454 Err(error) => return responder.respond(OffersMessage::InvoiceError(error.into())),
10457 OffersMessage::Invoice(invoice) => {
10458 let response = invoice
10459 .verify(expanded_key, secp_ctx)
10460 .map_err(|()| InvoiceError::from_string("Unrecognized invoice".to_owned()))
10461 .and_then(|payment_id| {
10462 let features = self.bolt12_invoice_features();
10463 if invoice.invoice_features().requires_unknown_bits_from(&features) {
10464 Err(InvoiceError::from(Bolt12SemanticError::UnknownRequiredFeatures))
10466 self.send_payment_for_bolt12_invoice(&invoice, payment_id)
10468 log_trace!(self.logger, "Failed paying invoice: {:?}", e);
10469 InvoiceError::from_string(format!("{:?}", e))
10474 match (responder, response) {
10475 (Some(responder), Err(e)) => responder.respond(OffersMessage::InvoiceError(e)),
10476 (None, Err(_)) => {
10479 "A response was generated, but there is no reply_path specified for sending the response."
10481 return ResponseInstruction::NoResponse;
10483 _ => return ResponseInstruction::NoResponse,
10486 OffersMessage::InvoiceError(invoice_error) => {
10487 log_trace!(self.logger, "Received invoice_error: {}", invoice_error);
10488 return ResponseInstruction::NoResponse;
10493 fn release_pending_messages(&self) -> Vec<PendingOnionMessage<OffersMessage>> {
10494 core::mem::take(&mut self.pending_offers_messages.lock().unwrap())
10498 impl<M: Deref, T: Deref, ES: Deref, NS: Deref, SP: Deref, F: Deref, R: Deref, L: Deref>
10499 NodeIdLookUp for ChannelManager<M, T, ES, NS, SP, F, R, L>
10501 M::Target: chain::Watch<<SP::Target as SignerProvider>::EcdsaSigner>,
10502 T::Target: BroadcasterInterface,
10503 ES::Target: EntropySource,
10504 NS::Target: NodeSigner,
10505 SP::Target: SignerProvider,
10506 F::Target: FeeEstimator,
10510 fn next_node_id(&self, short_channel_id: u64) -> Option<PublicKey> {
10511 self.short_to_chan_info.read().unwrap().get(&short_channel_id).map(|(pubkey, _)| *pubkey)
10515 /// Fetches the set of [`NodeFeatures`] flags that are provided by or required by
10516 /// [`ChannelManager`].
10517 pub(crate) fn provided_node_features(config: &UserConfig) -> NodeFeatures {
10518 let mut node_features = provided_init_features(config).to_context();
10519 node_features.set_keysend_optional();
10523 /// Fetches the set of [`Bolt11InvoiceFeatures`] flags that are provided by or required by
10524 /// [`ChannelManager`].
10526 /// Note that the invoice feature flags can vary depending on if the invoice is a "phantom invoice"
10527 /// or not. Thus, this method is not public.
10528 #[cfg(any(feature = "_test_utils", test))]
10529 pub(crate) fn provided_bolt11_invoice_features(config: &UserConfig) -> Bolt11InvoiceFeatures {
10530 provided_init_features(config).to_context()
10533 /// Fetches the set of [`Bolt12InvoiceFeatures`] flags that are provided by or required by
10534 /// [`ChannelManager`].
10535 pub(crate) fn provided_bolt12_invoice_features(config: &UserConfig) -> Bolt12InvoiceFeatures {
10536 provided_init_features(config).to_context()
10539 /// Fetches the set of [`ChannelFeatures`] flags that are provided by or required by
10540 /// [`ChannelManager`].
10541 pub(crate) fn provided_channel_features(config: &UserConfig) -> ChannelFeatures {
10542 provided_init_features(config).to_context()
10545 /// Fetches the set of [`ChannelTypeFeatures`] flags that are provided by or required by
10546 /// [`ChannelManager`].
10547 pub(crate) fn provided_channel_type_features(config: &UserConfig) -> ChannelTypeFeatures {
10548 ChannelTypeFeatures::from_init(&provided_init_features(config))
10551 /// Fetches the set of [`InitFeatures`] flags that are provided by or required by
10552 /// [`ChannelManager`].
10553 pub fn provided_init_features(config: &UserConfig) -> InitFeatures {
10554 // Note that if new features are added here which other peers may (eventually) require, we
10555 // should also add the corresponding (optional) bit to the [`ChannelMessageHandler`] impl for
10556 // [`ErroringMessageHandler`].
10557 let mut features = InitFeatures::empty();
10558 features.set_data_loss_protect_required();
10559 features.set_upfront_shutdown_script_optional();
10560 features.set_variable_length_onion_required();
10561 features.set_static_remote_key_required();
10562 features.set_payment_secret_required();
10563 features.set_basic_mpp_optional();
10564 features.set_wumbo_optional();
10565 features.set_shutdown_any_segwit_optional();
10566 features.set_channel_type_optional();
10567 features.set_scid_privacy_optional();
10568 features.set_zero_conf_optional();
10569 features.set_route_blinding_optional();
10570 if config.channel_handshake_config.negotiate_anchors_zero_fee_htlc_tx {
10571 features.set_anchors_zero_fee_htlc_tx_optional();
10576 const SERIALIZATION_VERSION: u8 = 1;
10577 const MIN_SERIALIZATION_VERSION: u8 = 1;
10579 impl_writeable_tlv_based!(CounterpartyForwardingInfo, {
10580 (2, fee_base_msat, required),
10581 (4, fee_proportional_millionths, required),
10582 (6, cltv_expiry_delta, required),
10585 impl_writeable_tlv_based!(ChannelCounterparty, {
10586 (2, node_id, required),
10587 (4, features, required),
10588 (6, unspendable_punishment_reserve, required),
10589 (8, forwarding_info, option),
10590 (9, outbound_htlc_minimum_msat, option),
10591 (11, outbound_htlc_maximum_msat, option),
10594 impl Writeable for ChannelDetails {
10595 fn write<W: Writer>(&self, writer: &mut W) -> Result<(), io::Error> {
10596 // `user_channel_id` used to be a single u64 value. In order to remain backwards compatible with
10597 // versions prior to 0.0.113, the u128 is serialized as two separate u64 values.
10598 let user_channel_id_low = self.user_channel_id as u64;
10599 let user_channel_id_high_opt = Some((self.user_channel_id >> 64) as u64);
10600 write_tlv_fields!(writer, {
10601 (1, self.inbound_scid_alias, option),
10602 (2, self.channel_id, required),
10603 (3, self.channel_type, option),
10604 (4, self.counterparty, required),
10605 (5, self.outbound_scid_alias, option),
10606 (6, self.funding_txo, option),
10607 (7, self.config, option),
10608 (8, self.short_channel_id, option),
10609 (9, self.confirmations, option),
10610 (10, self.channel_value_satoshis, required),
10611 (12, self.unspendable_punishment_reserve, option),
10612 (14, user_channel_id_low, required),
10613 (16, self.balance_msat, required),
10614 (18, self.outbound_capacity_msat, required),
10615 (19, self.next_outbound_htlc_limit_msat, required),
10616 (20, self.inbound_capacity_msat, required),
10617 (21, self.next_outbound_htlc_minimum_msat, required),
10618 (22, self.confirmations_required, option),
10619 (24, self.force_close_spend_delay, option),
10620 (26, self.is_outbound, required),
10621 (28, self.is_channel_ready, required),
10622 (30, self.is_usable, required),
10623 (32, self.is_public, required),
10624 (33, self.inbound_htlc_minimum_msat, option),
10625 (35, self.inbound_htlc_maximum_msat, option),
10626 (37, user_channel_id_high_opt, option),
10627 (39, self.feerate_sat_per_1000_weight, option),
10628 (41, self.channel_shutdown_state, option),
10629 (43, self.pending_inbound_htlcs, optional_vec),
10630 (45, self.pending_outbound_htlcs, optional_vec),
10636 impl Readable for ChannelDetails {
10637 fn read<R: Read>(reader: &mut R) -> Result<Self, DecodeError> {
10638 _init_and_read_len_prefixed_tlv_fields!(reader, {
10639 (1, inbound_scid_alias, option),
10640 (2, channel_id, required),
10641 (3, channel_type, option),
10642 (4, counterparty, required),
10643 (5, outbound_scid_alias, option),
10644 (6, funding_txo, option),
10645 (7, config, option),
10646 (8, short_channel_id, option),
10647 (9, confirmations, option),
10648 (10, channel_value_satoshis, required),
10649 (12, unspendable_punishment_reserve, option),
10650 (14, user_channel_id_low, required),
10651 (16, balance_msat, required),
10652 (18, outbound_capacity_msat, required),
10653 // Note that by the time we get past the required read above, outbound_capacity_msat will be
10654 // filled in, so we can safely unwrap it here.
10655 (19, next_outbound_htlc_limit_msat, (default_value, outbound_capacity_msat.0.unwrap() as u64)),
10656 (20, inbound_capacity_msat, required),
10657 (21, next_outbound_htlc_minimum_msat, (default_value, 0)),
10658 (22, confirmations_required, option),
10659 (24, force_close_spend_delay, option),
10660 (26, is_outbound, required),
10661 (28, is_channel_ready, required),
10662 (30, is_usable, required),
10663 (32, is_public, required),
10664 (33, inbound_htlc_minimum_msat, option),
10665 (35, inbound_htlc_maximum_msat, option),
10666 (37, user_channel_id_high_opt, option),
10667 (39, feerate_sat_per_1000_weight, option),
10668 (41, channel_shutdown_state, option),
10669 (43, pending_inbound_htlcs, optional_vec),
10670 (45, pending_outbound_htlcs, optional_vec),
10673 // `user_channel_id` used to be a single u64 value. In order to remain backwards compatible with
10674 // versions prior to 0.0.113, the u128 is serialized as two separate u64 values.
10675 let user_channel_id_low: u64 = user_channel_id_low.0.unwrap();
10676 let user_channel_id = user_channel_id_low as u128 +
10677 ((user_channel_id_high_opt.unwrap_or(0 as u64) as u128) << 64);
10680 inbound_scid_alias,
10681 channel_id: channel_id.0.unwrap(),
10683 counterparty: counterparty.0.unwrap(),
10684 outbound_scid_alias,
10688 channel_value_satoshis: channel_value_satoshis.0.unwrap(),
10689 unspendable_punishment_reserve,
10691 balance_msat: balance_msat.0.unwrap(),
10692 outbound_capacity_msat: outbound_capacity_msat.0.unwrap(),
10693 next_outbound_htlc_limit_msat: next_outbound_htlc_limit_msat.0.unwrap(),
10694 next_outbound_htlc_minimum_msat: next_outbound_htlc_minimum_msat.0.unwrap(),
10695 inbound_capacity_msat: inbound_capacity_msat.0.unwrap(),
10696 confirmations_required,
10698 force_close_spend_delay,
10699 is_outbound: is_outbound.0.unwrap(),
10700 is_channel_ready: is_channel_ready.0.unwrap(),
10701 is_usable: is_usable.0.unwrap(),
10702 is_public: is_public.0.unwrap(),
10703 inbound_htlc_minimum_msat,
10704 inbound_htlc_maximum_msat,
10705 feerate_sat_per_1000_weight,
10706 channel_shutdown_state,
10707 pending_inbound_htlcs: pending_inbound_htlcs.unwrap_or(Vec::new()),
10708 pending_outbound_htlcs: pending_outbound_htlcs.unwrap_or(Vec::new()),
10713 impl_writeable_tlv_based!(PhantomRouteHints, {
10714 (2, channels, required_vec),
10715 (4, phantom_scid, required),
10716 (6, real_node_pubkey, required),
10719 impl_writeable_tlv_based!(BlindedForward, {
10720 (0, inbound_blinding_point, required),
10721 (1, failure, (default_value, BlindedFailure::FromIntroductionNode)),
10724 impl_writeable_tlv_based_enum!(PendingHTLCRouting,
10726 (0, onion_packet, required),
10727 (1, blinded, option),
10728 (2, short_channel_id, required),
10731 (0, payment_data, required),
10732 (1, phantom_shared_secret, option),
10733 (2, incoming_cltv_expiry, required),
10734 (3, payment_metadata, option),
10735 (5, custom_tlvs, optional_vec),
10736 (7, requires_blinded_error, (default_value, false)),
10737 (9, payment_context, option),
10739 (2, ReceiveKeysend) => {
10740 (0, payment_preimage, required),
10741 (1, requires_blinded_error, (default_value, false)),
10742 (2, incoming_cltv_expiry, required),
10743 (3, payment_metadata, option),
10744 (4, payment_data, option), // Added in 0.0.116
10745 (5, custom_tlvs, optional_vec),
10749 impl_writeable_tlv_based!(PendingHTLCInfo, {
10750 (0, routing, required),
10751 (2, incoming_shared_secret, required),
10752 (4, payment_hash, required),
10753 (6, outgoing_amt_msat, required),
10754 (8, outgoing_cltv_value, required),
10755 (9, incoming_amt_msat, option),
10756 (10, skimmed_fee_msat, option),
10760 impl Writeable for HTLCFailureMsg {
10761 fn write<W: Writer>(&self, writer: &mut W) -> Result<(), io::Error> {
10763 HTLCFailureMsg::Relay(msgs::UpdateFailHTLC { channel_id, htlc_id, reason }) => {
10764 0u8.write(writer)?;
10765 channel_id.write(writer)?;
10766 htlc_id.write(writer)?;
10767 reason.write(writer)?;
10769 HTLCFailureMsg::Malformed(msgs::UpdateFailMalformedHTLC {
10770 channel_id, htlc_id, sha256_of_onion, failure_code
10772 1u8.write(writer)?;
10773 channel_id.write(writer)?;
10774 htlc_id.write(writer)?;
10775 sha256_of_onion.write(writer)?;
10776 failure_code.write(writer)?;
10783 impl Readable for HTLCFailureMsg {
10784 fn read<R: Read>(reader: &mut R) -> Result<Self, DecodeError> {
10785 let id: u8 = Readable::read(reader)?;
10788 Ok(HTLCFailureMsg::Relay(msgs::UpdateFailHTLC {
10789 channel_id: Readable::read(reader)?,
10790 htlc_id: Readable::read(reader)?,
10791 reason: Readable::read(reader)?,
10795 Ok(HTLCFailureMsg::Malformed(msgs::UpdateFailMalformedHTLC {
10796 channel_id: Readable::read(reader)?,
10797 htlc_id: Readable::read(reader)?,
10798 sha256_of_onion: Readable::read(reader)?,
10799 failure_code: Readable::read(reader)?,
10802 // In versions prior to 0.0.101, HTLCFailureMsg objects were written with type 0 or 1 but
10803 // weren't length-prefixed and thus didn't support reading the TLV stream suffix of the network
10804 // messages contained in the variants.
10805 // In version 0.0.101, support for reading the variants with these types was added, and
10806 // we should migrate to writing these variants when UpdateFailHTLC or
10807 // UpdateFailMalformedHTLC get TLV fields.
10809 let length: BigSize = Readable::read(reader)?;
10810 let mut s = FixedLengthReader::new(reader, length.0);
10811 let res = Readable::read(&mut s)?;
10812 s.eat_remaining()?; // Return ShortRead if there's actually not enough bytes
10813 Ok(HTLCFailureMsg::Relay(res))
10816 let length: BigSize = Readable::read(reader)?;
10817 let mut s = FixedLengthReader::new(reader, length.0);
10818 let res = Readable::read(&mut s)?;
10819 s.eat_remaining()?; // Return ShortRead if there's actually not enough bytes
10820 Ok(HTLCFailureMsg::Malformed(res))
10822 _ => Err(DecodeError::UnknownRequiredFeature),
10827 impl_writeable_tlv_based_enum!(PendingHTLCStatus, ;
10832 impl_writeable_tlv_based_enum!(BlindedFailure,
10833 (0, FromIntroductionNode) => {},
10834 (2, FromBlindedNode) => {}, ;
10837 impl_writeable_tlv_based!(HTLCPreviousHopData, {
10838 (0, short_channel_id, required),
10839 (1, phantom_shared_secret, option),
10840 (2, outpoint, required),
10841 (3, blinded_failure, option),
10842 (4, htlc_id, required),
10843 (6, incoming_packet_shared_secret, required),
10844 (7, user_channel_id, option),
10845 // Note that by the time we get past the required read for type 2 above, outpoint will be
10846 // filled in, so we can safely unwrap it here.
10847 (9, channel_id, (default_value, ChannelId::v1_from_funding_outpoint(outpoint.0.unwrap()))),
10850 impl Writeable for ClaimableHTLC {
10851 fn write<W: Writer>(&self, writer: &mut W) -> Result<(), io::Error> {
10852 let (payment_data, keysend_preimage) = match &self.onion_payload {
10853 OnionPayload::Invoice { _legacy_hop_data } => {
10854 (_legacy_hop_data.as_ref(), None)
10856 OnionPayload::Spontaneous(preimage) => (None, Some(preimage)),
10858 write_tlv_fields!(writer, {
10859 (0, self.prev_hop, required),
10860 (1, self.total_msat, required),
10861 (2, self.value, required),
10862 (3, self.sender_intended_value, required),
10863 (4, payment_data, option),
10864 (5, self.total_value_received, option),
10865 (6, self.cltv_expiry, required),
10866 (8, keysend_preimage, option),
10867 (10, self.counterparty_skimmed_fee_msat, option),
10873 impl Readable for ClaimableHTLC {
10874 fn read<R: Read>(reader: &mut R) -> Result<Self, DecodeError> {
10875 _init_and_read_len_prefixed_tlv_fields!(reader, {
10876 (0, prev_hop, required),
10877 (1, total_msat, option),
10878 (2, value_ser, required),
10879 (3, sender_intended_value, option),
10880 (4, payment_data_opt, option),
10881 (5, total_value_received, option),
10882 (6, cltv_expiry, required),
10883 (8, keysend_preimage, option),
10884 (10, counterparty_skimmed_fee_msat, option),
10886 let payment_data: Option<msgs::FinalOnionHopData> = payment_data_opt;
10887 let value = value_ser.0.unwrap();
10888 let onion_payload = match keysend_preimage {
10890 if payment_data.is_some() {
10891 return Err(DecodeError::InvalidValue)
10893 if total_msat.is_none() {
10894 total_msat = Some(value);
10896 OnionPayload::Spontaneous(p)
10899 if total_msat.is_none() {
10900 if payment_data.is_none() {
10901 return Err(DecodeError::InvalidValue)
10903 total_msat = Some(payment_data.as_ref().unwrap().total_msat);
10905 OnionPayload::Invoice { _legacy_hop_data: payment_data }
10909 prev_hop: prev_hop.0.unwrap(),
10912 sender_intended_value: sender_intended_value.unwrap_or(value),
10913 total_value_received,
10914 total_msat: total_msat.unwrap(),
10916 cltv_expiry: cltv_expiry.0.unwrap(),
10917 counterparty_skimmed_fee_msat,
10922 impl Readable for HTLCSource {
10923 fn read<R: Read>(reader: &mut R) -> Result<Self, DecodeError> {
10924 let id: u8 = Readable::read(reader)?;
10927 let mut session_priv: crate::util::ser::RequiredWrapper<SecretKey> = crate::util::ser::RequiredWrapper(None);
10928 let mut first_hop_htlc_msat: u64 = 0;
10929 let mut path_hops = Vec::new();
10930 let mut payment_id = None;
10931 let mut payment_params: Option<PaymentParameters> = None;
10932 let mut blinded_tail: Option<BlindedTail> = None;
10933 read_tlv_fields!(reader, {
10934 (0, session_priv, required),
10935 (1, payment_id, option),
10936 (2, first_hop_htlc_msat, required),
10937 (4, path_hops, required_vec),
10938 (5, payment_params, (option: ReadableArgs, 0)),
10939 (6, blinded_tail, option),
10941 if payment_id.is_none() {
10942 // For backwards compat, if there was no payment_id written, use the session_priv bytes
10944 payment_id = Some(PaymentId(*session_priv.0.unwrap().as_ref()));
10946 let path = Path { hops: path_hops, blinded_tail };
10947 if path.hops.len() == 0 {
10948 return Err(DecodeError::InvalidValue);
10950 if let Some(params) = payment_params.as_mut() {
10951 if let Payee::Clear { ref mut final_cltv_expiry_delta, .. } = params.payee {
10952 if final_cltv_expiry_delta == &0 {
10953 *final_cltv_expiry_delta = path.final_cltv_expiry_delta().ok_or(DecodeError::InvalidValue)?;
10957 Ok(HTLCSource::OutboundRoute {
10958 session_priv: session_priv.0.unwrap(),
10959 first_hop_htlc_msat,
10961 payment_id: payment_id.unwrap(),
10964 1 => Ok(HTLCSource::PreviousHopData(Readable::read(reader)?)),
10965 _ => Err(DecodeError::UnknownRequiredFeature),
10970 impl Writeable for HTLCSource {
10971 fn write<W: Writer>(&self, writer: &mut W) -> Result<(), crate::io::Error> {
10973 HTLCSource::OutboundRoute { ref session_priv, ref first_hop_htlc_msat, ref path, payment_id } => {
10974 0u8.write(writer)?;
10975 let payment_id_opt = Some(payment_id);
10976 write_tlv_fields!(writer, {
10977 (0, session_priv, required),
10978 (1, payment_id_opt, option),
10979 (2, first_hop_htlc_msat, required),
10980 // 3 was previously used to write a PaymentSecret for the payment.
10981 (4, path.hops, required_vec),
10982 (5, None::<PaymentParameters>, option), // payment_params in LDK versions prior to 0.0.115
10983 (6, path.blinded_tail, option),
10986 HTLCSource::PreviousHopData(ref field) => {
10987 1u8.write(writer)?;
10988 field.write(writer)?;
10995 impl_writeable_tlv_based!(PendingAddHTLCInfo, {
10996 (0, forward_info, required),
10997 (1, prev_user_channel_id, (default_value, 0)),
10998 (2, prev_short_channel_id, required),
10999 (4, prev_htlc_id, required),
11000 (6, prev_funding_outpoint, required),
11001 // Note that by the time we get past the required read for type 6 above, prev_funding_outpoint will be
11002 // filled in, so we can safely unwrap it here.
11003 (7, prev_channel_id, (default_value, ChannelId::v1_from_funding_outpoint(prev_funding_outpoint.0.unwrap()))),
11006 impl Writeable for HTLCForwardInfo {
11007 fn write<W: Writer>(&self, w: &mut W) -> Result<(), io::Error> {
11008 const FAIL_HTLC_VARIANT_ID: u8 = 1;
11010 Self::AddHTLC(info) => {
11014 Self::FailHTLC { htlc_id, err_packet } => {
11015 FAIL_HTLC_VARIANT_ID.write(w)?;
11016 write_tlv_fields!(w, {
11017 (0, htlc_id, required),
11018 (2, err_packet, required),
11021 Self::FailMalformedHTLC { htlc_id, failure_code, sha256_of_onion } => {
11022 // Since this variant was added in 0.0.119, write this as `::FailHTLC` with an empty error
11023 // packet so older versions have something to fail back with, but serialize the real data as
11024 // optional TLVs for the benefit of newer versions.
11025 FAIL_HTLC_VARIANT_ID.write(w)?;
11026 let dummy_err_packet = msgs::OnionErrorPacket { data: Vec::new() };
11027 write_tlv_fields!(w, {
11028 (0, htlc_id, required),
11029 (1, failure_code, required),
11030 (2, dummy_err_packet, required),
11031 (3, sha256_of_onion, required),
11039 impl Readable for HTLCForwardInfo {
11040 fn read<R: Read>(r: &mut R) -> Result<Self, DecodeError> {
11041 let id: u8 = Readable::read(r)?;
11043 0 => Self::AddHTLC(Readable::read(r)?),
11045 _init_and_read_len_prefixed_tlv_fields!(r, {
11046 (0, htlc_id, required),
11047 (1, malformed_htlc_failure_code, option),
11048 (2, err_packet, required),
11049 (3, sha256_of_onion, option),
11051 if let Some(failure_code) = malformed_htlc_failure_code {
11052 Self::FailMalformedHTLC {
11053 htlc_id: _init_tlv_based_struct_field!(htlc_id, required),
11055 sha256_of_onion: sha256_of_onion.ok_or(DecodeError::InvalidValue)?,
11059 htlc_id: _init_tlv_based_struct_field!(htlc_id, required),
11060 err_packet: _init_tlv_based_struct_field!(err_packet, required),
11064 _ => return Err(DecodeError::InvalidValue),
11069 impl_writeable_tlv_based!(PendingInboundPayment, {
11070 (0, payment_secret, required),
11071 (2, expiry_time, required),
11072 (4, user_payment_id, required),
11073 (6, payment_preimage, required),
11074 (8, min_value_msat, required),
11077 impl<M: Deref, T: Deref, ES: Deref, NS: Deref, SP: Deref, F: Deref, R: Deref, L: Deref> Writeable for ChannelManager<M, T, ES, NS, SP, F, R, L>
11079 M::Target: chain::Watch<<SP::Target as SignerProvider>::EcdsaSigner>,
11080 T::Target: BroadcasterInterface,
11081 ES::Target: EntropySource,
11082 NS::Target: NodeSigner,
11083 SP::Target: SignerProvider,
11084 F::Target: FeeEstimator,
11088 fn write<W: Writer>(&self, writer: &mut W) -> Result<(), io::Error> {
11089 let _consistency_lock = self.total_consistency_lock.write().unwrap();
11091 write_ver_prefix!(writer, SERIALIZATION_VERSION, MIN_SERIALIZATION_VERSION);
11093 self.chain_hash.write(writer)?;
11095 let best_block = self.best_block.read().unwrap();
11096 best_block.height.write(writer)?;
11097 best_block.block_hash.write(writer)?;
11100 let per_peer_state = self.per_peer_state.write().unwrap();
11102 let mut serializable_peer_count: u64 = 0;
11104 let mut number_of_funded_channels = 0;
11105 for (_, peer_state_mutex) in per_peer_state.iter() {
11106 let mut peer_state_lock = peer_state_mutex.lock().unwrap();
11107 let peer_state = &mut *peer_state_lock;
11108 if !peer_state.ok_to_remove(false) {
11109 serializable_peer_count += 1;
11112 number_of_funded_channels += peer_state.channel_by_id.iter().filter(
11113 |(_, phase)| if let ChannelPhase::Funded(chan) = phase { chan.context.is_funding_broadcast() } else { false }
11117 (number_of_funded_channels as u64).write(writer)?;
11119 for (_, peer_state_mutex) in per_peer_state.iter() {
11120 let mut peer_state_lock = peer_state_mutex.lock().unwrap();
11121 let peer_state = &mut *peer_state_lock;
11122 for channel in peer_state.channel_by_id.iter().filter_map(
11123 |(_, phase)| if let ChannelPhase::Funded(channel) = phase {
11124 if channel.context.is_funding_broadcast() { Some(channel) } else { None }
11127 channel.write(writer)?;
11133 let forward_htlcs = self.forward_htlcs.lock().unwrap();
11134 (forward_htlcs.len() as u64).write(writer)?;
11135 for (short_channel_id, pending_forwards) in forward_htlcs.iter() {
11136 short_channel_id.write(writer)?;
11137 (pending_forwards.len() as u64).write(writer)?;
11138 for forward in pending_forwards {
11139 forward.write(writer)?;
11144 let mut decode_update_add_htlcs_opt = None;
11145 let decode_update_add_htlcs = self.decode_update_add_htlcs.lock().unwrap();
11146 if !decode_update_add_htlcs.is_empty() {
11147 decode_update_add_htlcs_opt = Some(decode_update_add_htlcs);
11150 let pending_inbound_payments = self.pending_inbound_payments.lock().unwrap();
11151 let claimable_payments = self.claimable_payments.lock().unwrap();
11152 let pending_outbound_payments = self.pending_outbound_payments.pending_outbound_payments.lock().unwrap();
11154 let mut htlc_purposes: Vec<&events::PaymentPurpose> = Vec::new();
11155 let mut htlc_onion_fields: Vec<&_> = Vec::new();
11156 (claimable_payments.claimable_payments.len() as u64).write(writer)?;
11157 for (payment_hash, payment) in claimable_payments.claimable_payments.iter() {
11158 payment_hash.write(writer)?;
11159 (payment.htlcs.len() as u64).write(writer)?;
11160 for htlc in payment.htlcs.iter() {
11161 htlc.write(writer)?;
11163 htlc_purposes.push(&payment.purpose);
11164 htlc_onion_fields.push(&payment.onion_fields);
11167 let mut monitor_update_blocked_actions_per_peer = None;
11168 let mut peer_states = Vec::new();
11169 for (_, peer_state_mutex) in per_peer_state.iter() {
11170 // Because we're holding the owning `per_peer_state` write lock here there's no chance
11171 // of a lockorder violation deadlock - no other thread can be holding any
11172 // per_peer_state lock at all.
11173 peer_states.push(peer_state_mutex.unsafe_well_ordered_double_lock_self());
11176 (serializable_peer_count).write(writer)?;
11177 for ((peer_pubkey, _), peer_state) in per_peer_state.iter().zip(peer_states.iter()) {
11178 // Peers which we have no channels to should be dropped once disconnected. As we
11179 // disconnect all peers when shutting down and serializing the ChannelManager, we
11180 // consider all peers as disconnected here. There's therefore no need write peers with
11182 if !peer_state.ok_to_remove(false) {
11183 peer_pubkey.write(writer)?;
11184 peer_state.latest_features.write(writer)?;
11185 if !peer_state.monitor_update_blocked_actions.is_empty() {
11186 monitor_update_blocked_actions_per_peer
11187 .get_or_insert_with(Vec::new)
11188 .push((*peer_pubkey, &peer_state.monitor_update_blocked_actions));
11193 let events = self.pending_events.lock().unwrap();
11194 // LDK versions prior to 0.0.115 don't support post-event actions, thus if there's no
11195 // actions at all, skip writing the required TLV. Otherwise, pre-0.0.115 versions will
11196 // refuse to read the new ChannelManager.
11197 let events_not_backwards_compatible = events.iter().any(|(_, action)| action.is_some());
11198 if events_not_backwards_compatible {
11199 // If we're gonna write a even TLV that will overwrite our events anyway we might as
11200 // well save the space and not write any events here.
11201 0u64.write(writer)?;
11203 (events.len() as u64).write(writer)?;
11204 for (event, _) in events.iter() {
11205 event.write(writer)?;
11209 // LDK versions prior to 0.0.116 wrote the `pending_background_events`
11210 // `MonitorUpdateRegeneratedOnStartup`s here, however there was never a reason to do so -
11211 // the closing monitor updates were always effectively replayed on startup (either directly
11212 // by calling `broadcast_latest_holder_commitment_txn` on a `ChannelMonitor` during
11213 // deserialization or, in 0.0.115, by regenerating the monitor update itself).
11214 0u64.write(writer)?;
11216 // Prior to 0.0.111 we tracked node_announcement serials here, however that now happens in
11217 // `PeerManager`, and thus we simply write the `highest_seen_timestamp` twice, which is
11218 // likely to be identical.
11219 (self.highest_seen_timestamp.load(Ordering::Acquire) as u32).write(writer)?;
11220 (self.highest_seen_timestamp.load(Ordering::Acquire) as u32).write(writer)?;
11222 (pending_inbound_payments.len() as u64).write(writer)?;
11223 for (hash, pending_payment) in pending_inbound_payments.iter() {
11224 hash.write(writer)?;
11225 pending_payment.write(writer)?;
11228 // For backwards compat, write the session privs and their total length.
11229 let mut num_pending_outbounds_compat: u64 = 0;
11230 for (_, outbound) in pending_outbound_payments.iter() {
11231 if !outbound.is_fulfilled() && !outbound.abandoned() {
11232 num_pending_outbounds_compat += outbound.remaining_parts() as u64;
11235 num_pending_outbounds_compat.write(writer)?;
11236 for (_, outbound) in pending_outbound_payments.iter() {
11238 PendingOutboundPayment::Legacy { session_privs } |
11239 PendingOutboundPayment::Retryable { session_privs, .. } => {
11240 for session_priv in session_privs.iter() {
11241 session_priv.write(writer)?;
11244 PendingOutboundPayment::AwaitingInvoice { .. } => {},
11245 PendingOutboundPayment::InvoiceReceived { .. } => {},
11246 PendingOutboundPayment::Fulfilled { .. } => {},
11247 PendingOutboundPayment::Abandoned { .. } => {},
11251 // Encode without retry info for 0.0.101 compatibility.
11252 let mut pending_outbound_payments_no_retry: HashMap<PaymentId, HashSet<[u8; 32]>> = new_hash_map();
11253 for (id, outbound) in pending_outbound_payments.iter() {
11255 PendingOutboundPayment::Legacy { session_privs } |
11256 PendingOutboundPayment::Retryable { session_privs, .. } => {
11257 pending_outbound_payments_no_retry.insert(*id, session_privs.clone());
11263 let mut pending_intercepted_htlcs = None;
11264 let our_pending_intercepts = self.pending_intercepted_htlcs.lock().unwrap();
11265 if our_pending_intercepts.len() != 0 {
11266 pending_intercepted_htlcs = Some(our_pending_intercepts);
11269 let mut pending_claiming_payments = Some(&claimable_payments.pending_claiming_payments);
11270 if pending_claiming_payments.as_ref().unwrap().is_empty() {
11271 // LDK versions prior to 0.0.113 do not know how to read the pending claimed payments
11272 // map. Thus, if there are no entries we skip writing a TLV for it.
11273 pending_claiming_payments = None;
11276 let mut in_flight_monitor_updates: Option<HashMap<(&PublicKey, &OutPoint), &Vec<ChannelMonitorUpdate>>> = None;
11277 for ((counterparty_id, _), peer_state) in per_peer_state.iter().zip(peer_states.iter()) {
11278 for (funding_outpoint, updates) in peer_state.in_flight_monitor_updates.iter() {
11279 if !updates.is_empty() {
11280 if in_flight_monitor_updates.is_none() { in_flight_monitor_updates = Some(new_hash_map()); }
11281 in_flight_monitor_updates.as_mut().unwrap().insert((counterparty_id, funding_outpoint), updates);
11286 write_tlv_fields!(writer, {
11287 (1, pending_outbound_payments_no_retry, required),
11288 (2, pending_intercepted_htlcs, option),
11289 (3, pending_outbound_payments, required),
11290 (4, pending_claiming_payments, option),
11291 (5, self.our_network_pubkey, required),
11292 (6, monitor_update_blocked_actions_per_peer, option),
11293 (7, self.fake_scid_rand_bytes, required),
11294 (8, if events_not_backwards_compatible { Some(&*events) } else { None }, option),
11295 (9, htlc_purposes, required_vec),
11296 (10, in_flight_monitor_updates, option),
11297 (11, self.probing_cookie_secret, required),
11298 (13, htlc_onion_fields, optional_vec),
11299 (14, decode_update_add_htlcs_opt, option),
11306 impl Writeable for VecDeque<(Event, Option<EventCompletionAction>)> {
11307 fn write<W: Writer>(&self, w: &mut W) -> Result<(), io::Error> {
11308 (self.len() as u64).write(w)?;
11309 for (event, action) in self.iter() {
11312 #[cfg(debug_assertions)] {
11313 // Events are MaybeReadable, in some cases indicating that they shouldn't actually
11314 // be persisted and are regenerated on restart. However, if such an event has a
11315 // post-event-handling action we'll write nothing for the event and would have to
11316 // either forget the action or fail on deserialization (which we do below). Thus,
11317 // check that the event is sane here.
11318 let event_encoded = event.encode();
11319 let event_read: Option<Event> =
11320 MaybeReadable::read(&mut &event_encoded[..]).unwrap();
11321 if action.is_some() { assert!(event_read.is_some()); }
11327 impl Readable for VecDeque<(Event, Option<EventCompletionAction>)> {
11328 fn read<R: Read>(reader: &mut R) -> Result<Self, DecodeError> {
11329 let len: u64 = Readable::read(reader)?;
11330 const MAX_ALLOC_SIZE: u64 = 1024 * 16;
11331 let mut events: Self = VecDeque::with_capacity(cmp::min(
11332 MAX_ALLOC_SIZE/mem::size_of::<(events::Event, Option<EventCompletionAction>)>() as u64,
11335 let ev_opt = MaybeReadable::read(reader)?;
11336 let action = Readable::read(reader)?;
11337 if let Some(ev) = ev_opt {
11338 events.push_back((ev, action));
11339 } else if action.is_some() {
11340 return Err(DecodeError::InvalidValue);
11347 impl_writeable_tlv_based_enum!(ChannelShutdownState,
11348 (0, NotShuttingDown) => {},
11349 (2, ShutdownInitiated) => {},
11350 (4, ResolvingHTLCs) => {},
11351 (6, NegotiatingClosingFee) => {},
11352 (8, ShutdownComplete) => {}, ;
11355 /// Arguments for the creation of a ChannelManager that are not deserialized.
11357 /// At a high-level, the process for deserializing a ChannelManager and resuming normal operation
11359 /// 1) Deserialize all stored [`ChannelMonitor`]s.
11360 /// 2) Deserialize the [`ChannelManager`] by filling in this struct and calling:
11361 /// `<(BlockHash, ChannelManager)>::read(reader, args)`
11362 /// This may result in closing some channels if the [`ChannelMonitor`] is newer than the stored
11363 /// [`ChannelManager`] state to ensure no loss of funds. Thus, transactions may be broadcasted.
11364 /// 3) If you are not fetching full blocks, register all relevant [`ChannelMonitor`] outpoints the
11365 /// same way you would handle a [`chain::Filter`] call using
11366 /// [`ChannelMonitor::get_outputs_to_watch`] and [`ChannelMonitor::get_funding_txo`].
11367 /// 4) Reconnect blocks on your [`ChannelMonitor`]s.
11368 /// 5) Disconnect/connect blocks on the [`ChannelManager`].
11369 /// 6) Re-persist the [`ChannelMonitor`]s to ensure the latest state is on disk.
11370 /// Note that if you're using a [`ChainMonitor`] for your [`chain::Watch`] implementation, you
11371 /// will likely accomplish this as a side-effect of calling [`chain::Watch::watch_channel`] in
11373 /// 7) Move the [`ChannelMonitor`]s into your local [`chain::Watch`]. If you're using a
11374 /// [`ChainMonitor`], this is done by calling [`chain::Watch::watch_channel`].
11376 /// Note that the ordering of #4-7 is not of importance, however all four must occur before you
11377 /// call any other methods on the newly-deserialized [`ChannelManager`].
11379 /// Note that because some channels may be closed during deserialization, it is critical that you
11380 /// always deserialize only the latest version of a ChannelManager and ChannelMonitors available to
11381 /// you. If you deserialize an old ChannelManager (during which force-closure transactions may be
11382 /// broadcast), and then later deserialize a newer version of the same ChannelManager (which will
11383 /// not force-close the same channels but consider them live), you may end up revoking a state for
11384 /// which you've already broadcasted the transaction.
11386 /// [`ChainMonitor`]: crate::chain::chainmonitor::ChainMonitor
11387 pub struct ChannelManagerReadArgs<'a, M: Deref, T: Deref, ES: Deref, NS: Deref, SP: Deref, F: Deref, R: Deref, L: Deref>
11389 M::Target: chain::Watch<<SP::Target as SignerProvider>::EcdsaSigner>,
11390 T::Target: BroadcasterInterface,
11391 ES::Target: EntropySource,
11392 NS::Target: NodeSigner,
11393 SP::Target: SignerProvider,
11394 F::Target: FeeEstimator,
11398 /// A cryptographically secure source of entropy.
11399 pub entropy_source: ES,
11401 /// A signer that is able to perform node-scoped cryptographic operations.
11402 pub node_signer: NS,
11404 /// The keys provider which will give us relevant keys. Some keys will be loaded during
11405 /// deserialization and KeysInterface::read_chan_signer will be used to read per-Channel
11407 pub signer_provider: SP,
11409 /// The fee_estimator for use in the ChannelManager in the future.
11411 /// No calls to the FeeEstimator will be made during deserialization.
11412 pub fee_estimator: F,
11413 /// The chain::Watch for use in the ChannelManager in the future.
11415 /// No calls to the chain::Watch will be made during deserialization. It is assumed that
11416 /// you have deserialized ChannelMonitors separately and will add them to your
11417 /// chain::Watch after deserializing this ChannelManager.
11418 pub chain_monitor: M,
11420 /// The BroadcasterInterface which will be used in the ChannelManager in the future and may be
11421 /// used to broadcast the latest local commitment transactions of channels which must be
11422 /// force-closed during deserialization.
11423 pub tx_broadcaster: T,
11424 /// The router which will be used in the ChannelManager in the future for finding routes
11425 /// on-the-fly for trampoline payments. Absent in private nodes that don't support forwarding.
11427 /// No calls to the router will be made during deserialization.
11429 /// The Logger for use in the ChannelManager and which may be used to log information during
11430 /// deserialization.
11432 /// Default settings used for new channels. Any existing channels will continue to use the
11433 /// runtime settings which were stored when the ChannelManager was serialized.
11434 pub default_config: UserConfig,
11436 /// A map from channel funding outpoints to ChannelMonitors for those channels (ie
11437 /// value.context.get_funding_txo() should be the key).
11439 /// If a monitor is inconsistent with the channel state during deserialization the channel will
11440 /// be force-closed using the data in the ChannelMonitor and the channel will be dropped. This
11441 /// is true for missing channels as well. If there is a monitor missing for which we find
11442 /// channel data Err(DecodeError::InvalidValue) will be returned.
11444 /// In such cases the latest local transactions will be sent to the tx_broadcaster included in
11447 /// This is not exported to bindings users because we have no HashMap bindings
11448 pub channel_monitors: HashMap<OutPoint, &'a mut ChannelMonitor<<SP::Target as SignerProvider>::EcdsaSigner>>,
11451 impl<'a, M: Deref, T: Deref, ES: Deref, NS: Deref, SP: Deref, F: Deref, R: Deref, L: Deref>
11452 ChannelManagerReadArgs<'a, M, T, ES, NS, SP, F, R, L>
11454 M::Target: chain::Watch<<SP::Target as SignerProvider>::EcdsaSigner>,
11455 T::Target: BroadcasterInterface,
11456 ES::Target: EntropySource,
11457 NS::Target: NodeSigner,
11458 SP::Target: SignerProvider,
11459 F::Target: FeeEstimator,
11463 /// Simple utility function to create a ChannelManagerReadArgs which creates the monitor
11464 /// HashMap for you. This is primarily useful for C bindings where it is not practical to
11465 /// populate a HashMap directly from C.
11466 pub fn new(entropy_source: ES, node_signer: NS, signer_provider: SP, fee_estimator: F, chain_monitor: M, tx_broadcaster: T, router: R, logger: L, default_config: UserConfig,
11467 mut channel_monitors: Vec<&'a mut ChannelMonitor<<SP::Target as SignerProvider>::EcdsaSigner>>) -> Self {
11469 entropy_source, node_signer, signer_provider, fee_estimator, chain_monitor, tx_broadcaster, router, logger, default_config,
11470 channel_monitors: hash_map_from_iter(
11471 channel_monitors.drain(..).map(|monitor| { (monitor.get_funding_txo().0, monitor) })
11477 // Implement ReadableArgs for an Arc'd ChannelManager to make it a bit easier to work with the
11478 // SipmleArcChannelManager type:
11479 impl<'a, M: Deref, T: Deref, ES: Deref, NS: Deref, SP: Deref, F: Deref, R: Deref, L: Deref>
11480 ReadableArgs<ChannelManagerReadArgs<'a, M, T, ES, NS, SP, F, R, L>> for (BlockHash, Arc<ChannelManager<M, T, ES, NS, SP, F, R, L>>)
11482 M::Target: chain::Watch<<SP::Target as SignerProvider>::EcdsaSigner>,
11483 T::Target: BroadcasterInterface,
11484 ES::Target: EntropySource,
11485 NS::Target: NodeSigner,
11486 SP::Target: SignerProvider,
11487 F::Target: FeeEstimator,
11491 fn read<Reader: io::Read>(reader: &mut Reader, args: ChannelManagerReadArgs<'a, M, T, ES, NS, SP, F, R, L>) -> Result<Self, DecodeError> {
11492 let (blockhash, chan_manager) = <(BlockHash, ChannelManager<M, T, ES, NS, SP, F, R, L>)>::read(reader, args)?;
11493 Ok((blockhash, Arc::new(chan_manager)))
11497 impl<'a, M: Deref, T: Deref, ES: Deref, NS: Deref, SP: Deref, F: Deref, R: Deref, L: Deref>
11498 ReadableArgs<ChannelManagerReadArgs<'a, M, T, ES, NS, SP, F, R, L>> for (BlockHash, ChannelManager<M, T, ES, NS, SP, F, R, L>)
11500 M::Target: chain::Watch<<SP::Target as SignerProvider>::EcdsaSigner>,
11501 T::Target: BroadcasterInterface,
11502 ES::Target: EntropySource,
11503 NS::Target: NodeSigner,
11504 SP::Target: SignerProvider,
11505 F::Target: FeeEstimator,
11509 fn read<Reader: io::Read>(reader: &mut Reader, mut args: ChannelManagerReadArgs<'a, M, T, ES, NS, SP, F, R, L>) -> Result<Self, DecodeError> {
11510 let _ver = read_ver_prefix!(reader, SERIALIZATION_VERSION);
11512 let chain_hash: ChainHash = Readable::read(reader)?;
11513 let best_block_height: u32 = Readable::read(reader)?;
11514 let best_block_hash: BlockHash = Readable::read(reader)?;
11516 let mut failed_htlcs = Vec::new();
11518 let channel_count: u64 = Readable::read(reader)?;
11519 let mut funding_txo_set = hash_set_with_capacity(cmp::min(channel_count as usize, 128));
11520 let mut funded_peer_channels: HashMap<PublicKey, HashMap<ChannelId, ChannelPhase<SP>>> = hash_map_with_capacity(cmp::min(channel_count as usize, 128));
11521 let mut outpoint_to_peer = hash_map_with_capacity(cmp::min(channel_count as usize, 128));
11522 let mut short_to_chan_info = hash_map_with_capacity(cmp::min(channel_count as usize, 128));
11523 let mut channel_closures = VecDeque::new();
11524 let mut close_background_events = Vec::new();
11525 let mut funding_txo_to_channel_id = hash_map_with_capacity(channel_count as usize);
11526 for _ in 0..channel_count {
11527 let mut channel: Channel<SP> = Channel::read(reader, (
11528 &args.entropy_source, &args.signer_provider, best_block_height, &provided_channel_type_features(&args.default_config)
11530 let logger = WithChannelContext::from(&args.logger, &channel.context, None);
11531 let funding_txo = channel.context.get_funding_txo().ok_or(DecodeError::InvalidValue)?;
11532 funding_txo_to_channel_id.insert(funding_txo, channel.context.channel_id());
11533 funding_txo_set.insert(funding_txo.clone());
11534 if let Some(ref mut monitor) = args.channel_monitors.get_mut(&funding_txo) {
11535 if channel.get_cur_holder_commitment_transaction_number() > monitor.get_cur_holder_commitment_number() ||
11536 channel.get_revoked_counterparty_commitment_transaction_number() > monitor.get_min_seen_secret() ||
11537 channel.get_cur_counterparty_commitment_transaction_number() > monitor.get_cur_counterparty_commitment_number() ||
11538 channel.context.get_latest_monitor_update_id() < monitor.get_latest_update_id() {
11539 // But if the channel is behind of the monitor, close the channel:
11540 log_error!(logger, "A ChannelManager is stale compared to the current ChannelMonitor!");
11541 log_error!(logger, " The channel will be force-closed and the latest commitment transaction from the ChannelMonitor broadcast.");
11542 if channel.context.get_latest_monitor_update_id() < monitor.get_latest_update_id() {
11543 log_error!(logger, " The ChannelMonitor for channel {} is at update_id {} but the ChannelManager is at update_id {}.",
11544 &channel.context.channel_id(), monitor.get_latest_update_id(), channel.context.get_latest_monitor_update_id());
11546 if channel.get_cur_holder_commitment_transaction_number() > monitor.get_cur_holder_commitment_number() {
11547 log_error!(logger, " The ChannelMonitor for channel {} is at holder commitment number {} but the ChannelManager is at holder commitment number {}.",
11548 &channel.context.channel_id(), monitor.get_cur_holder_commitment_number(), channel.get_cur_holder_commitment_transaction_number());
11550 if channel.get_revoked_counterparty_commitment_transaction_number() > monitor.get_min_seen_secret() {
11551 log_error!(logger, " The ChannelMonitor for channel {} is at revoked counterparty transaction number {} but the ChannelManager is at revoked counterparty transaction number {}.",
11552 &channel.context.channel_id(), monitor.get_min_seen_secret(), channel.get_revoked_counterparty_commitment_transaction_number());
11554 if channel.get_cur_counterparty_commitment_transaction_number() > monitor.get_cur_counterparty_commitment_number() {
11555 log_error!(logger, " The ChannelMonitor for channel {} is at counterparty commitment transaction number {} but the ChannelManager is at counterparty commitment transaction number {}.",
11556 &channel.context.channel_id(), monitor.get_cur_counterparty_commitment_number(), channel.get_cur_counterparty_commitment_transaction_number());
11558 let mut shutdown_result = channel.context.force_shutdown(true, ClosureReason::OutdatedChannelManager);
11559 if shutdown_result.unbroadcasted_batch_funding_txid.is_some() {
11560 return Err(DecodeError::InvalidValue);
11562 if let Some((counterparty_node_id, funding_txo, channel_id, update)) = shutdown_result.monitor_update {
11563 close_background_events.push(BackgroundEvent::MonitorUpdateRegeneratedOnStartup {
11564 counterparty_node_id, funding_txo, channel_id, update
11567 failed_htlcs.append(&mut shutdown_result.dropped_outbound_htlcs);
11568 channel_closures.push_back((events::Event::ChannelClosed {
11569 channel_id: channel.context.channel_id(),
11570 user_channel_id: channel.context.get_user_id(),
11571 reason: ClosureReason::OutdatedChannelManager,
11572 counterparty_node_id: Some(channel.context.get_counterparty_node_id()),
11573 channel_capacity_sats: Some(channel.context.get_value_satoshis()),
11574 channel_funding_txo: channel.context.get_funding_txo(),
11576 for (channel_htlc_source, payment_hash) in channel.inflight_htlc_sources() {
11577 let mut found_htlc = false;
11578 for (monitor_htlc_source, _) in monitor.get_all_current_outbound_htlcs() {
11579 if *channel_htlc_source == monitor_htlc_source { found_htlc = true; break; }
11582 // If we have some HTLCs in the channel which are not present in the newer
11583 // ChannelMonitor, they have been removed and should be failed back to
11584 // ensure we don't forget them entirely. Note that if the missing HTLC(s)
11585 // were actually claimed we'd have generated and ensured the previous-hop
11586 // claim update ChannelMonitor updates were persisted prior to persising
11587 // the ChannelMonitor update for the forward leg, so attempting to fail the
11588 // backwards leg of the HTLC will simply be rejected.
11589 let logger = WithChannelContext::from(&args.logger, &channel.context, Some(*payment_hash));
11591 "Failing HTLC with hash {} as it is missing in the ChannelMonitor for channel {} but was present in the (stale) ChannelManager",
11592 &channel.context.channel_id(), &payment_hash);
11593 failed_htlcs.push((channel_htlc_source.clone(), *payment_hash, channel.context.get_counterparty_node_id(), channel.context.channel_id()));
11597 channel.on_startup_drop_completed_blocked_mon_updates_through(&logger, monitor.get_latest_update_id());
11598 log_info!(logger, "Successfully loaded channel {} at update_id {} against monitor at update id {} with {} blocked updates",
11599 &channel.context.channel_id(), channel.context.get_latest_monitor_update_id(),
11600 monitor.get_latest_update_id(), channel.blocked_monitor_updates_pending());
11601 if let Some(short_channel_id) = channel.context.get_short_channel_id() {
11602 short_to_chan_info.insert(short_channel_id, (channel.context.get_counterparty_node_id(), channel.context.channel_id()));
11604 if let Some(funding_txo) = channel.context.get_funding_txo() {
11605 outpoint_to_peer.insert(funding_txo, channel.context.get_counterparty_node_id());
11607 match funded_peer_channels.entry(channel.context.get_counterparty_node_id()) {
11608 hash_map::Entry::Occupied(mut entry) => {
11609 let by_id_map = entry.get_mut();
11610 by_id_map.insert(channel.context.channel_id(), ChannelPhase::Funded(channel));
11612 hash_map::Entry::Vacant(entry) => {
11613 let mut by_id_map = new_hash_map();
11614 by_id_map.insert(channel.context.channel_id(), ChannelPhase::Funded(channel));
11615 entry.insert(by_id_map);
11619 } else if channel.is_awaiting_initial_mon_persist() {
11620 // If we were persisted and shut down while the initial ChannelMonitor persistence
11621 // was in-progress, we never broadcasted the funding transaction and can still
11622 // safely discard the channel.
11623 let _ = channel.context.force_shutdown(false, ClosureReason::DisconnectedPeer);
11624 channel_closures.push_back((events::Event::ChannelClosed {
11625 channel_id: channel.context.channel_id(),
11626 user_channel_id: channel.context.get_user_id(),
11627 reason: ClosureReason::DisconnectedPeer,
11628 counterparty_node_id: Some(channel.context.get_counterparty_node_id()),
11629 channel_capacity_sats: Some(channel.context.get_value_satoshis()),
11630 channel_funding_txo: channel.context.get_funding_txo(),
11633 log_error!(logger, "Missing ChannelMonitor for channel {} needed by ChannelManager.", &channel.context.channel_id());
11634 log_error!(logger, " The chain::Watch API *requires* that monitors are persisted durably before returning,");
11635 log_error!(logger, " client applications must ensure that ChannelMonitor data is always available and the latest to avoid funds loss!");
11636 log_error!(logger, " Without the ChannelMonitor we cannot continue without risking funds.");
11637 log_error!(logger, " Please ensure the chain::Watch API requirements are met and file a bug report at https://github.com/lightningdevkit/rust-lightning");
11638 return Err(DecodeError::InvalidValue);
11642 for (funding_txo, monitor) in args.channel_monitors.iter() {
11643 if !funding_txo_set.contains(funding_txo) {
11644 let logger = WithChannelMonitor::from(&args.logger, monitor, None);
11645 let channel_id = monitor.channel_id();
11646 log_info!(logger, "Queueing monitor update to ensure missing channel {} is force closed",
11648 let monitor_update = ChannelMonitorUpdate {
11649 update_id: CLOSED_CHANNEL_UPDATE_ID,
11650 counterparty_node_id: None,
11651 updates: vec![ChannelMonitorUpdateStep::ChannelForceClosed { should_broadcast: true }],
11652 channel_id: Some(monitor.channel_id()),
11654 close_background_events.push(BackgroundEvent::ClosedMonitorUpdateRegeneratedOnStartup((*funding_txo, channel_id, monitor_update)));
11658 const MAX_ALLOC_SIZE: usize = 1024 * 64;
11659 let forward_htlcs_count: u64 = Readable::read(reader)?;
11660 let mut forward_htlcs = hash_map_with_capacity(cmp::min(forward_htlcs_count as usize, 128));
11661 for _ in 0..forward_htlcs_count {
11662 let short_channel_id = Readable::read(reader)?;
11663 let pending_forwards_count: u64 = Readable::read(reader)?;
11664 let mut pending_forwards = Vec::with_capacity(cmp::min(pending_forwards_count as usize, MAX_ALLOC_SIZE/mem::size_of::<HTLCForwardInfo>()));
11665 for _ in 0..pending_forwards_count {
11666 pending_forwards.push(Readable::read(reader)?);
11668 forward_htlcs.insert(short_channel_id, pending_forwards);
11671 let claimable_htlcs_count: u64 = Readable::read(reader)?;
11672 let mut claimable_htlcs_list = Vec::with_capacity(cmp::min(claimable_htlcs_count as usize, 128));
11673 for _ in 0..claimable_htlcs_count {
11674 let payment_hash = Readable::read(reader)?;
11675 let previous_hops_len: u64 = Readable::read(reader)?;
11676 let mut previous_hops = Vec::with_capacity(cmp::min(previous_hops_len as usize, MAX_ALLOC_SIZE/mem::size_of::<ClaimableHTLC>()));
11677 for _ in 0..previous_hops_len {
11678 previous_hops.push(<ClaimableHTLC as Readable>::read(reader)?);
11680 claimable_htlcs_list.push((payment_hash, previous_hops));
11683 let peer_state_from_chans = |channel_by_id| {
11686 inbound_channel_request_by_id: new_hash_map(),
11687 latest_features: InitFeatures::empty(),
11688 pending_msg_events: Vec::new(),
11689 in_flight_monitor_updates: BTreeMap::new(),
11690 monitor_update_blocked_actions: BTreeMap::new(),
11691 actions_blocking_raa_monitor_updates: BTreeMap::new(),
11692 is_connected: false,
11696 let peer_count: u64 = Readable::read(reader)?;
11697 let mut per_peer_state = hash_map_with_capacity(cmp::min(peer_count as usize, MAX_ALLOC_SIZE/mem::size_of::<(PublicKey, Mutex<PeerState<SP>>)>()));
11698 for _ in 0..peer_count {
11699 let peer_pubkey = Readable::read(reader)?;
11700 let peer_chans = funded_peer_channels.remove(&peer_pubkey).unwrap_or(new_hash_map());
11701 let mut peer_state = peer_state_from_chans(peer_chans);
11702 peer_state.latest_features = Readable::read(reader)?;
11703 per_peer_state.insert(peer_pubkey, Mutex::new(peer_state));
11706 let event_count: u64 = Readable::read(reader)?;
11707 let mut pending_events_read: VecDeque<(events::Event, Option<EventCompletionAction>)> =
11708 VecDeque::with_capacity(cmp::min(event_count as usize, MAX_ALLOC_SIZE/mem::size_of::<(events::Event, Option<EventCompletionAction>)>()));
11709 for _ in 0..event_count {
11710 match MaybeReadable::read(reader)? {
11711 Some(event) => pending_events_read.push_back((event, None)),
11716 let background_event_count: u64 = Readable::read(reader)?;
11717 for _ in 0..background_event_count {
11718 match <u8 as Readable>::read(reader)? {
11720 // LDK versions prior to 0.0.116 wrote pending `MonitorUpdateRegeneratedOnStartup`s here,
11721 // however we really don't (and never did) need them - we regenerate all
11722 // on-startup monitor updates.
11723 let _: OutPoint = Readable::read(reader)?;
11724 let _: ChannelMonitorUpdate = Readable::read(reader)?;
11726 _ => return Err(DecodeError::InvalidValue),
11730 let _last_node_announcement_serial: u32 = Readable::read(reader)?; // Only used < 0.0.111
11731 let highest_seen_timestamp: u32 = Readable::read(reader)?;
11733 let pending_inbound_payment_count: u64 = Readable::read(reader)?;
11734 let mut pending_inbound_payments: HashMap<PaymentHash, PendingInboundPayment> = hash_map_with_capacity(cmp::min(pending_inbound_payment_count as usize, MAX_ALLOC_SIZE/(3*32)));
11735 for _ in 0..pending_inbound_payment_count {
11736 if pending_inbound_payments.insert(Readable::read(reader)?, Readable::read(reader)?).is_some() {
11737 return Err(DecodeError::InvalidValue);
11741 let pending_outbound_payments_count_compat: u64 = Readable::read(reader)?;
11742 let mut pending_outbound_payments_compat: HashMap<PaymentId, PendingOutboundPayment> =
11743 hash_map_with_capacity(cmp::min(pending_outbound_payments_count_compat as usize, MAX_ALLOC_SIZE/32));
11744 for _ in 0..pending_outbound_payments_count_compat {
11745 let session_priv = Readable::read(reader)?;
11746 let payment = PendingOutboundPayment::Legacy {
11747 session_privs: hash_set_from_iter([session_priv]),
11749 if pending_outbound_payments_compat.insert(PaymentId(session_priv), payment).is_some() {
11750 return Err(DecodeError::InvalidValue)
11754 // pending_outbound_payments_no_retry is for compatibility with 0.0.101 clients.
11755 let mut pending_outbound_payments_no_retry: Option<HashMap<PaymentId, HashSet<[u8; 32]>>> = None;
11756 let mut pending_outbound_payments = None;
11757 let mut pending_intercepted_htlcs: Option<HashMap<InterceptId, PendingAddHTLCInfo>> = Some(new_hash_map());
11758 let mut received_network_pubkey: Option<PublicKey> = None;
11759 let mut fake_scid_rand_bytes: Option<[u8; 32]> = None;
11760 let mut probing_cookie_secret: Option<[u8; 32]> = None;
11761 let mut claimable_htlc_purposes = None;
11762 let mut claimable_htlc_onion_fields = None;
11763 let mut pending_claiming_payments = Some(new_hash_map());
11764 let mut monitor_update_blocked_actions_per_peer: Option<Vec<(_, BTreeMap<_, Vec<_>>)>> = Some(Vec::new());
11765 let mut events_override = None;
11766 let mut in_flight_monitor_updates: Option<HashMap<(PublicKey, OutPoint), Vec<ChannelMonitorUpdate>>> = None;
11767 let mut decode_update_add_htlcs: Option<HashMap<u64, Vec<msgs::UpdateAddHTLC>>> = None;
11768 read_tlv_fields!(reader, {
11769 (1, pending_outbound_payments_no_retry, option),
11770 (2, pending_intercepted_htlcs, option),
11771 (3, pending_outbound_payments, option),
11772 (4, pending_claiming_payments, option),
11773 (5, received_network_pubkey, option),
11774 (6, monitor_update_blocked_actions_per_peer, option),
11775 (7, fake_scid_rand_bytes, option),
11776 (8, events_override, option),
11777 (9, claimable_htlc_purposes, optional_vec),
11778 (10, in_flight_monitor_updates, option),
11779 (11, probing_cookie_secret, option),
11780 (13, claimable_htlc_onion_fields, optional_vec),
11781 (14, decode_update_add_htlcs, option),
11783 let mut decode_update_add_htlcs = decode_update_add_htlcs.unwrap_or_else(|| new_hash_map());
11784 if fake_scid_rand_bytes.is_none() {
11785 fake_scid_rand_bytes = Some(args.entropy_source.get_secure_random_bytes());
11788 if probing_cookie_secret.is_none() {
11789 probing_cookie_secret = Some(args.entropy_source.get_secure_random_bytes());
11792 if let Some(events) = events_override {
11793 pending_events_read = events;
11796 if !channel_closures.is_empty() {
11797 pending_events_read.append(&mut channel_closures);
11800 if pending_outbound_payments.is_none() && pending_outbound_payments_no_retry.is_none() {
11801 pending_outbound_payments = Some(pending_outbound_payments_compat);
11802 } else if pending_outbound_payments.is_none() {
11803 let mut outbounds = new_hash_map();
11804 for (id, session_privs) in pending_outbound_payments_no_retry.unwrap().drain() {
11805 outbounds.insert(id, PendingOutboundPayment::Legacy { session_privs });
11807 pending_outbound_payments = Some(outbounds);
11809 let pending_outbounds = OutboundPayments {
11810 pending_outbound_payments: Mutex::new(pending_outbound_payments.unwrap()),
11811 retry_lock: Mutex::new(())
11814 // We have to replay (or skip, if they were completed after we wrote the `ChannelManager`)
11815 // each `ChannelMonitorUpdate` in `in_flight_monitor_updates`. After doing so, we have to
11816 // check that each channel we have isn't newer than the latest `ChannelMonitorUpdate`(s) we
11817 // replayed, and for each monitor update we have to replay we have to ensure there's a
11818 // `ChannelMonitor` for it.
11820 // In order to do so we first walk all of our live channels (so that we can check their
11821 // state immediately after doing the update replays, when we have the `update_id`s
11822 // available) and then walk any remaining in-flight updates.
11824 // Because the actual handling of the in-flight updates is the same, it's macro'ized here:
11825 let mut pending_background_events = Vec::new();
11826 macro_rules! handle_in_flight_updates {
11827 ($counterparty_node_id: expr, $chan_in_flight_upds: expr, $funding_txo: expr,
11828 $monitor: expr, $peer_state: expr, $logger: expr, $channel_info_log: expr
11830 let mut max_in_flight_update_id = 0;
11831 $chan_in_flight_upds.retain(|upd| upd.update_id > $monitor.get_latest_update_id());
11832 for update in $chan_in_flight_upds.iter() {
11833 log_trace!($logger, "Replaying ChannelMonitorUpdate {} for {}channel {}",
11834 update.update_id, $channel_info_log, &$monitor.channel_id());
11835 max_in_flight_update_id = cmp::max(max_in_flight_update_id, update.update_id);
11836 pending_background_events.push(
11837 BackgroundEvent::MonitorUpdateRegeneratedOnStartup {
11838 counterparty_node_id: $counterparty_node_id,
11839 funding_txo: $funding_txo,
11840 channel_id: $monitor.channel_id(),
11841 update: update.clone(),
11844 if $chan_in_flight_upds.is_empty() {
11845 // We had some updates to apply, but it turns out they had completed before we
11846 // were serialized, we just weren't notified of that. Thus, we may have to run
11847 // the completion actions for any monitor updates, but otherwise are done.
11848 pending_background_events.push(
11849 BackgroundEvent::MonitorUpdatesComplete {
11850 counterparty_node_id: $counterparty_node_id,
11851 channel_id: $monitor.channel_id(),
11854 if $peer_state.in_flight_monitor_updates.insert($funding_txo, $chan_in_flight_upds).is_some() {
11855 log_error!($logger, "Duplicate in-flight monitor update set for the same channel!");
11856 return Err(DecodeError::InvalidValue);
11858 max_in_flight_update_id
11862 for (counterparty_id, peer_state_mtx) in per_peer_state.iter_mut() {
11863 let mut peer_state_lock = peer_state_mtx.lock().unwrap();
11864 let peer_state = &mut *peer_state_lock;
11865 for phase in peer_state.channel_by_id.values() {
11866 if let ChannelPhase::Funded(chan) = phase {
11867 let logger = WithChannelContext::from(&args.logger, &chan.context, None);
11869 // Channels that were persisted have to be funded, otherwise they should have been
11871 let funding_txo = chan.context.get_funding_txo().ok_or(DecodeError::InvalidValue)?;
11872 let monitor = args.channel_monitors.get(&funding_txo)
11873 .expect("We already checked for monitor presence when loading channels");
11874 let mut max_in_flight_update_id = monitor.get_latest_update_id();
11875 if let Some(in_flight_upds) = &mut in_flight_monitor_updates {
11876 if let Some(mut chan_in_flight_upds) = in_flight_upds.remove(&(*counterparty_id, funding_txo)) {
11877 max_in_flight_update_id = cmp::max(max_in_flight_update_id,
11878 handle_in_flight_updates!(*counterparty_id, chan_in_flight_upds,
11879 funding_txo, monitor, peer_state, logger, ""));
11882 if chan.get_latest_unblocked_monitor_update_id() > max_in_flight_update_id {
11883 // If the channel is ahead of the monitor, return DangerousValue:
11884 log_error!(logger, "A ChannelMonitor is stale compared to the current ChannelManager! This indicates a potentially-critical violation of the chain::Watch API!");
11885 log_error!(logger, " The ChannelMonitor for channel {} is at update_id {} with update_id through {} in-flight",
11886 chan.context.channel_id(), monitor.get_latest_update_id(), max_in_flight_update_id);
11887 log_error!(logger, " but the ChannelManager is at update_id {}.", chan.get_latest_unblocked_monitor_update_id());
11888 log_error!(logger, " The chain::Watch API *requires* that monitors are persisted durably before returning,");
11889 log_error!(logger, " client applications must ensure that ChannelMonitor data is always available and the latest to avoid funds loss!");
11890 log_error!(logger, " Without the latest ChannelMonitor we cannot continue without risking funds.");
11891 log_error!(logger, " Please ensure the chain::Watch API requirements are met and file a bug report at https://github.com/lightningdevkit/rust-lightning");
11892 return Err(DecodeError::DangerousValue);
11895 // We shouldn't have persisted (or read) any unfunded channel types so none should have been
11896 // created in this `channel_by_id` map.
11897 debug_assert!(false);
11898 return Err(DecodeError::InvalidValue);
11903 if let Some(in_flight_upds) = in_flight_monitor_updates {
11904 for ((counterparty_id, funding_txo), mut chan_in_flight_updates) in in_flight_upds {
11905 let channel_id = funding_txo_to_channel_id.get(&funding_txo).copied();
11906 let logger = WithContext::from(&args.logger, Some(counterparty_id), channel_id, None);
11907 if let Some(monitor) = args.channel_monitors.get(&funding_txo) {
11908 // Now that we've removed all the in-flight monitor updates for channels that are
11909 // still open, we need to replay any monitor updates that are for closed channels,
11910 // creating the neccessary peer_state entries as we go.
11911 let peer_state_mutex = per_peer_state.entry(counterparty_id).or_insert_with(|| {
11912 Mutex::new(peer_state_from_chans(new_hash_map()))
11914 let mut peer_state = peer_state_mutex.lock().unwrap();
11915 handle_in_flight_updates!(counterparty_id, chan_in_flight_updates,
11916 funding_txo, monitor, peer_state, logger, "closed ");
11918 log_error!(logger, "A ChannelMonitor is missing even though we have in-flight updates for it! This indicates a potentially-critical violation of the chain::Watch API!");
11919 log_error!(logger, " The ChannelMonitor for channel {} is missing.", if let Some(channel_id) =
11920 channel_id { channel_id.to_string() } else { format!("with outpoint {}", funding_txo) } );
11921 log_error!(logger, " The chain::Watch API *requires* that monitors are persisted durably before returning,");
11922 log_error!(logger, " client applications must ensure that ChannelMonitor data is always available and the latest to avoid funds loss!");
11923 log_error!(logger, " Without the latest ChannelMonitor we cannot continue without risking funds.");
11924 log_error!(logger, " Please ensure the chain::Watch API requirements are met and file a bug report at https://github.com/lightningdevkit/rust-lightning");
11925 log_error!(logger, " Pending in-flight updates are: {:?}", chan_in_flight_updates);
11926 return Err(DecodeError::InvalidValue);
11931 // Note that we have to do the above replays before we push new monitor updates.
11932 pending_background_events.append(&mut close_background_events);
11934 // If there's any preimages for forwarded HTLCs hanging around in ChannelMonitors we
11935 // should ensure we try them again on the inbound edge. We put them here and do so after we
11936 // have a fully-constructed `ChannelManager` at the end.
11937 let mut pending_claims_to_replay = Vec::new();
11940 // If we're tracking pending payments, ensure we haven't lost any by looking at the
11941 // ChannelMonitor data for any channels for which we do not have authorative state
11942 // (i.e. those for which we just force-closed above or we otherwise don't have a
11943 // corresponding `Channel` at all).
11944 // This avoids several edge-cases where we would otherwise "forget" about pending
11945 // payments which are still in-flight via their on-chain state.
11946 // We only rebuild the pending payments map if we were most recently serialized by
11948 for (_, monitor) in args.channel_monitors.iter() {
11949 let counterparty_opt = outpoint_to_peer.get(&monitor.get_funding_txo().0);
11950 if counterparty_opt.is_none() {
11951 for (htlc_source, (htlc, _)) in monitor.get_pending_or_resolved_outbound_htlcs() {
11952 let logger = WithChannelMonitor::from(&args.logger, monitor, Some(htlc.payment_hash));
11953 if let HTLCSource::OutboundRoute { payment_id, session_priv, path, .. } = htlc_source {
11954 if path.hops.is_empty() {
11955 log_error!(logger, "Got an empty path for a pending payment");
11956 return Err(DecodeError::InvalidValue);
11959 let path_amt = path.final_value_msat();
11960 let mut session_priv_bytes = [0; 32];
11961 session_priv_bytes[..].copy_from_slice(&session_priv[..]);
11962 match pending_outbounds.pending_outbound_payments.lock().unwrap().entry(payment_id) {
11963 hash_map::Entry::Occupied(mut entry) => {
11964 let newly_added = entry.get_mut().insert(session_priv_bytes, &path);
11965 log_info!(logger, "{} a pending payment path for {} msat for session priv {} on an existing pending payment with payment hash {}",
11966 if newly_added { "Added" } else { "Had" }, path_amt, log_bytes!(session_priv_bytes), htlc.payment_hash);
11968 hash_map::Entry::Vacant(entry) => {
11969 let path_fee = path.fee_msat();
11970 entry.insert(PendingOutboundPayment::Retryable {
11971 retry_strategy: None,
11972 attempts: PaymentAttempts::new(),
11973 payment_params: None,
11974 session_privs: hash_set_from_iter([session_priv_bytes]),
11975 payment_hash: htlc.payment_hash,
11976 payment_secret: None, // only used for retries, and we'll never retry on startup
11977 payment_metadata: None, // only used for retries, and we'll never retry on startup
11978 keysend_preimage: None, // only used for retries, and we'll never retry on startup
11979 custom_tlvs: Vec::new(), // only used for retries, and we'll never retry on startup
11980 pending_amt_msat: path_amt,
11981 pending_fee_msat: Some(path_fee),
11982 total_msat: path_amt,
11983 starting_block_height: best_block_height,
11984 remaining_max_total_routing_fee_msat: None, // only used for retries, and we'll never retry on startup
11986 log_info!(logger, "Added a pending payment for {} msat with payment hash {} for path with session priv {}",
11987 path_amt, &htlc.payment_hash, log_bytes!(session_priv_bytes));
11992 for (htlc_source, (htlc, preimage_opt)) in monitor.get_all_current_outbound_htlcs() {
11993 let logger = WithChannelMonitor::from(&args.logger, monitor, Some(htlc.payment_hash));
11994 match htlc_source {
11995 HTLCSource::PreviousHopData(prev_hop_data) => {
11996 let pending_forward_matches_htlc = |info: &PendingAddHTLCInfo| {
11997 info.prev_funding_outpoint == prev_hop_data.outpoint &&
11998 info.prev_htlc_id == prev_hop_data.htlc_id
12000 // The ChannelMonitor is now responsible for this HTLC's
12001 // failure/success and will let us know what its outcome is. If we
12002 // still have an entry for this HTLC in `forward_htlcs` or
12003 // `pending_intercepted_htlcs`, we were apparently not persisted after
12004 // the monitor was when forwarding the payment.
12005 decode_update_add_htlcs.retain(|scid, update_add_htlcs| {
12006 update_add_htlcs.retain(|update_add_htlc| {
12007 let matches = *scid == prev_hop_data.short_channel_id &&
12008 update_add_htlc.htlc_id == prev_hop_data.htlc_id;
12010 log_info!(logger, "Removing pending to-decode HTLC with hash {} as it was forwarded to the closed channel {}",
12011 &htlc.payment_hash, &monitor.channel_id());
12015 !update_add_htlcs.is_empty()
12017 forward_htlcs.retain(|_, forwards| {
12018 forwards.retain(|forward| {
12019 if let HTLCForwardInfo::AddHTLC(htlc_info) = forward {
12020 if pending_forward_matches_htlc(&htlc_info) {
12021 log_info!(logger, "Removing pending to-forward HTLC with hash {} as it was forwarded to the closed channel {}",
12022 &htlc.payment_hash, &monitor.channel_id());
12027 !forwards.is_empty()
12029 pending_intercepted_htlcs.as_mut().unwrap().retain(|intercepted_id, htlc_info| {
12030 if pending_forward_matches_htlc(&htlc_info) {
12031 log_info!(logger, "Removing pending intercepted HTLC with hash {} as it was forwarded to the closed channel {}",
12032 &htlc.payment_hash, &monitor.channel_id());
12033 pending_events_read.retain(|(event, _)| {
12034 if let Event::HTLCIntercepted { intercept_id: ev_id, .. } = event {
12035 intercepted_id != ev_id
12042 HTLCSource::OutboundRoute { payment_id, session_priv, path, .. } => {
12043 if let Some(preimage) = preimage_opt {
12044 let pending_events = Mutex::new(pending_events_read);
12045 // Note that we set `from_onchain` to "false" here,
12046 // deliberately keeping the pending payment around forever.
12047 // Given it should only occur when we have a channel we're
12048 // force-closing for being stale that's okay.
12049 // The alternative would be to wipe the state when claiming,
12050 // generating a `PaymentPathSuccessful` event but regenerating
12051 // it and the `PaymentSent` on every restart until the
12052 // `ChannelMonitor` is removed.
12054 EventCompletionAction::ReleaseRAAChannelMonitorUpdate {
12055 channel_funding_outpoint: monitor.get_funding_txo().0,
12056 channel_id: monitor.channel_id(),
12057 counterparty_node_id: path.hops[0].pubkey,
12059 pending_outbounds.claim_htlc(payment_id, preimage, session_priv,
12060 path, false, compl_action, &pending_events, &&logger);
12061 pending_events_read = pending_events.into_inner().unwrap();
12068 // Whether the downstream channel was closed or not, try to re-apply any payment
12069 // preimages from it which may be needed in upstream channels for forwarded
12071 let outbound_claimed_htlcs_iter = monitor.get_all_current_outbound_htlcs()
12073 .filter_map(|(htlc_source, (htlc, preimage_opt))| {
12074 if let HTLCSource::PreviousHopData(_) = htlc_source {
12075 if let Some(payment_preimage) = preimage_opt {
12076 Some((htlc_source, payment_preimage, htlc.amount_msat,
12077 // Check if `counterparty_opt.is_none()` to see if the
12078 // downstream chan is closed (because we don't have a
12079 // channel_id -> peer map entry).
12080 counterparty_opt.is_none(),
12081 counterparty_opt.cloned().or(monitor.get_counterparty_node_id()),
12082 monitor.get_funding_txo().0, monitor.channel_id()))
12085 // If it was an outbound payment, we've handled it above - if a preimage
12086 // came in and we persisted the `ChannelManager` we either handled it and
12087 // are good to go or the channel force-closed - we don't have to handle the
12088 // channel still live case here.
12092 for tuple in outbound_claimed_htlcs_iter {
12093 pending_claims_to_replay.push(tuple);
12098 if !forward_htlcs.is_empty() || !decode_update_add_htlcs.is_empty() || pending_outbounds.needs_abandon() {
12099 // If we have pending HTLCs to forward, assume we either dropped a
12100 // `PendingHTLCsForwardable` or the user received it but never processed it as they
12101 // shut down before the timer hit. Either way, set the time_forwardable to a small
12102 // constant as enough time has likely passed that we should simply handle the forwards
12103 // now, or at least after the user gets a chance to reconnect to our peers.
12104 pending_events_read.push_back((events::Event::PendingHTLCsForwardable {
12105 time_forwardable: Duration::from_secs(2),
12109 let inbound_pmt_key_material = args.node_signer.get_inbound_payment_key_material();
12110 let expanded_inbound_key = inbound_payment::ExpandedKey::new(&inbound_pmt_key_material);
12112 let mut claimable_payments = hash_map_with_capacity(claimable_htlcs_list.len());
12113 if let Some(purposes) = claimable_htlc_purposes {
12114 if purposes.len() != claimable_htlcs_list.len() {
12115 return Err(DecodeError::InvalidValue);
12117 if let Some(onion_fields) = claimable_htlc_onion_fields {
12118 if onion_fields.len() != claimable_htlcs_list.len() {
12119 return Err(DecodeError::InvalidValue);
12121 for (purpose, (onion, (payment_hash, htlcs))) in
12122 purposes.into_iter().zip(onion_fields.into_iter().zip(claimable_htlcs_list.into_iter()))
12124 let existing_payment = claimable_payments.insert(payment_hash, ClaimablePayment {
12125 purpose, htlcs, onion_fields: onion,
12127 if existing_payment.is_some() { return Err(DecodeError::InvalidValue); }
12130 for (purpose, (payment_hash, htlcs)) in purposes.into_iter().zip(claimable_htlcs_list.into_iter()) {
12131 let existing_payment = claimable_payments.insert(payment_hash, ClaimablePayment {
12132 purpose, htlcs, onion_fields: None,
12134 if existing_payment.is_some() { return Err(DecodeError::InvalidValue); }
12138 // LDK versions prior to 0.0.107 did not write a `pending_htlc_purposes`, but do
12139 // include a `_legacy_hop_data` in the `OnionPayload`.
12140 for (payment_hash, htlcs) in claimable_htlcs_list.drain(..) {
12141 if htlcs.is_empty() {
12142 return Err(DecodeError::InvalidValue);
12144 let purpose = match &htlcs[0].onion_payload {
12145 OnionPayload::Invoice { _legacy_hop_data } => {
12146 if let Some(hop_data) = _legacy_hop_data {
12147 events::PaymentPurpose::Bolt11InvoicePayment {
12148 payment_preimage: match pending_inbound_payments.get(&payment_hash) {
12149 Some(inbound_payment) => inbound_payment.payment_preimage,
12150 None => match inbound_payment::verify(payment_hash, &hop_data, 0, &expanded_inbound_key, &args.logger) {
12151 Ok((payment_preimage, _)) => payment_preimage,
12153 log_error!(args.logger, "Failed to read claimable payment data for HTLC with payment hash {} - was not a pending inbound payment and didn't match our payment key", &payment_hash);
12154 return Err(DecodeError::InvalidValue);
12158 payment_secret: hop_data.payment_secret,
12160 } else { return Err(DecodeError::InvalidValue); }
12162 OnionPayload::Spontaneous(payment_preimage) =>
12163 events::PaymentPurpose::SpontaneousPayment(*payment_preimage),
12165 claimable_payments.insert(payment_hash, ClaimablePayment {
12166 purpose, htlcs, onion_fields: None,
12171 let mut secp_ctx = Secp256k1::new();
12172 secp_ctx.seeded_randomize(&args.entropy_source.get_secure_random_bytes());
12174 let our_network_pubkey = match args.node_signer.get_node_id(Recipient::Node) {
12176 Err(()) => return Err(DecodeError::InvalidValue)
12178 if let Some(network_pubkey) = received_network_pubkey {
12179 if network_pubkey != our_network_pubkey {
12180 log_error!(args.logger, "Key that was generated does not match the existing key.");
12181 return Err(DecodeError::InvalidValue);
12185 let mut outbound_scid_aliases = new_hash_set();
12186 for (_peer_node_id, peer_state_mutex) in per_peer_state.iter_mut() {
12187 let mut peer_state_lock = peer_state_mutex.lock().unwrap();
12188 let peer_state = &mut *peer_state_lock;
12189 for (chan_id, phase) in peer_state.channel_by_id.iter_mut() {
12190 if let ChannelPhase::Funded(chan) = phase {
12191 let logger = WithChannelContext::from(&args.logger, &chan.context, None);
12192 if chan.context.outbound_scid_alias() == 0 {
12193 let mut outbound_scid_alias;
12195 outbound_scid_alias = fake_scid::Namespace::OutboundAlias
12196 .get_fake_scid(best_block_height, &chain_hash, fake_scid_rand_bytes.as_ref().unwrap(), &args.entropy_source);
12197 if outbound_scid_aliases.insert(outbound_scid_alias) { break; }
12199 chan.context.set_outbound_scid_alias(outbound_scid_alias);
12200 } else if !outbound_scid_aliases.insert(chan.context.outbound_scid_alias()) {
12201 // Note that in rare cases its possible to hit this while reading an older
12202 // channel if we just happened to pick a colliding outbound alias above.
12203 log_error!(logger, "Got duplicate outbound SCID alias; {}", chan.context.outbound_scid_alias());
12204 return Err(DecodeError::InvalidValue);
12206 if chan.context.is_usable() {
12207 if short_to_chan_info.insert(chan.context.outbound_scid_alias(), (chan.context.get_counterparty_node_id(), *chan_id)).is_some() {
12208 // Note that in rare cases its possible to hit this while reading an older
12209 // channel if we just happened to pick a colliding outbound alias above.
12210 log_error!(logger, "Got duplicate outbound SCID alias; {}", chan.context.outbound_scid_alias());
12211 return Err(DecodeError::InvalidValue);
12215 // We shouldn't have persisted (or read) any unfunded channel types so none should have been
12216 // created in this `channel_by_id` map.
12217 debug_assert!(false);
12218 return Err(DecodeError::InvalidValue);
12223 let bounded_fee_estimator = LowerBoundedFeeEstimator::new(args.fee_estimator);
12225 for (_, monitor) in args.channel_monitors.iter() {
12226 for (payment_hash, payment_preimage) in monitor.get_stored_preimages() {
12227 if let Some(payment) = claimable_payments.remove(&payment_hash) {
12228 log_info!(args.logger, "Re-claiming HTLCs with payment hash {} as we've released the preimage to a ChannelMonitor!", &payment_hash);
12229 let mut claimable_amt_msat = 0;
12230 let mut receiver_node_id = Some(our_network_pubkey);
12231 let phantom_shared_secret = payment.htlcs[0].prev_hop.phantom_shared_secret;
12232 if phantom_shared_secret.is_some() {
12233 let phantom_pubkey = args.node_signer.get_node_id(Recipient::PhantomNode)
12234 .expect("Failed to get node_id for phantom node recipient");
12235 receiver_node_id = Some(phantom_pubkey)
12237 for claimable_htlc in &payment.htlcs {
12238 claimable_amt_msat += claimable_htlc.value;
12240 // Add a holding-cell claim of the payment to the Channel, which should be
12241 // applied ~immediately on peer reconnection. Because it won't generate a
12242 // new commitment transaction we can just provide the payment preimage to
12243 // the corresponding ChannelMonitor and nothing else.
12245 // We do so directly instead of via the normal ChannelMonitor update
12246 // procedure as the ChainMonitor hasn't yet been initialized, implying
12247 // we're not allowed to call it directly yet. Further, we do the update
12248 // without incrementing the ChannelMonitor update ID as there isn't any
12250 // If we were to generate a new ChannelMonitor update ID here and then
12251 // crash before the user finishes block connect we'd end up force-closing
12252 // this channel as well. On the flip side, there's no harm in restarting
12253 // without the new monitor persisted - we'll end up right back here on
12255 let previous_channel_id = claimable_htlc.prev_hop.channel_id;
12256 if let Some(peer_node_id) = outpoint_to_peer.get(&claimable_htlc.prev_hop.outpoint) {
12257 let peer_state_mutex = per_peer_state.get(peer_node_id).unwrap();
12258 let mut peer_state_lock = peer_state_mutex.lock().unwrap();
12259 let peer_state = &mut *peer_state_lock;
12260 if let Some(ChannelPhase::Funded(channel)) = peer_state.channel_by_id.get_mut(&previous_channel_id) {
12261 let logger = WithChannelContext::from(&args.logger, &channel.context, Some(payment_hash));
12262 channel.claim_htlc_while_disconnected_dropping_mon_update(claimable_htlc.prev_hop.htlc_id, payment_preimage, &&logger);
12265 if let Some(previous_hop_monitor) = args.channel_monitors.get(&claimable_htlc.prev_hop.outpoint) {
12266 previous_hop_monitor.provide_payment_preimage(&payment_hash, &payment_preimage, &args.tx_broadcaster, &bounded_fee_estimator, &args.logger);
12269 pending_events_read.push_back((events::Event::PaymentClaimed {
12272 purpose: payment.purpose,
12273 amount_msat: claimable_amt_msat,
12274 htlcs: payment.htlcs.iter().map(events::ClaimedHTLC::from).collect(),
12275 sender_intended_total_msat: payment.htlcs.first().map(|htlc| htlc.total_msat),
12281 for (node_id, monitor_update_blocked_actions) in monitor_update_blocked_actions_per_peer.unwrap() {
12282 if let Some(peer_state) = per_peer_state.get(&node_id) {
12283 for (channel_id, actions) in monitor_update_blocked_actions.iter() {
12284 let logger = WithContext::from(&args.logger, Some(node_id), Some(*channel_id), None);
12285 for action in actions.iter() {
12286 if let MonitorUpdateCompletionAction::EmitEventAndFreeOtherChannel {
12287 downstream_counterparty_and_funding_outpoint:
12288 Some((blocked_node_id, _blocked_channel_outpoint, blocked_channel_id, blocking_action)), ..
12290 if let Some(blocked_peer_state) = per_peer_state.get(blocked_node_id) {
12292 "Holding the next revoke_and_ack from {} until the preimage is durably persisted in the inbound edge's ChannelMonitor",
12293 blocked_channel_id);
12294 blocked_peer_state.lock().unwrap().actions_blocking_raa_monitor_updates
12295 .entry(*blocked_channel_id)
12296 .or_insert_with(Vec::new).push(blocking_action.clone());
12298 // If the channel we were blocking has closed, we don't need to
12299 // worry about it - the blocked monitor update should never have
12300 // been released from the `Channel` object so it can't have
12301 // completed, and if the channel closed there's no reason to bother
12305 if let MonitorUpdateCompletionAction::FreeOtherChannelImmediately { .. } = action {
12306 debug_assert!(false, "Non-event-generating channel freeing should not appear in our queue");
12310 peer_state.lock().unwrap().monitor_update_blocked_actions = monitor_update_blocked_actions;
12312 log_error!(WithContext::from(&args.logger, Some(node_id), None, None), "Got blocked actions without a per-peer-state for {}", node_id);
12313 return Err(DecodeError::InvalidValue);
12317 let channel_manager = ChannelManager {
12319 fee_estimator: bounded_fee_estimator,
12320 chain_monitor: args.chain_monitor,
12321 tx_broadcaster: args.tx_broadcaster,
12322 router: args.router,
12324 best_block: RwLock::new(BestBlock::new(best_block_hash, best_block_height)),
12326 inbound_payment_key: expanded_inbound_key,
12327 pending_inbound_payments: Mutex::new(pending_inbound_payments),
12328 pending_outbound_payments: pending_outbounds,
12329 pending_intercepted_htlcs: Mutex::new(pending_intercepted_htlcs.unwrap()),
12331 forward_htlcs: Mutex::new(forward_htlcs),
12332 decode_update_add_htlcs: Mutex::new(decode_update_add_htlcs),
12333 claimable_payments: Mutex::new(ClaimablePayments { claimable_payments, pending_claiming_payments: pending_claiming_payments.unwrap() }),
12334 outbound_scid_aliases: Mutex::new(outbound_scid_aliases),
12335 outpoint_to_peer: Mutex::new(outpoint_to_peer),
12336 short_to_chan_info: FairRwLock::new(short_to_chan_info),
12337 fake_scid_rand_bytes: fake_scid_rand_bytes.unwrap(),
12339 probing_cookie_secret: probing_cookie_secret.unwrap(),
12341 our_network_pubkey,
12344 highest_seen_timestamp: AtomicUsize::new(highest_seen_timestamp as usize),
12346 per_peer_state: FairRwLock::new(per_peer_state),
12348 pending_events: Mutex::new(pending_events_read),
12349 pending_events_processor: AtomicBool::new(false),
12350 pending_background_events: Mutex::new(pending_background_events),
12351 total_consistency_lock: RwLock::new(()),
12352 background_events_processed_since_startup: AtomicBool::new(false),
12354 event_persist_notifier: Notifier::new(),
12355 needs_persist_flag: AtomicBool::new(false),
12357 funding_batch_states: Mutex::new(BTreeMap::new()),
12359 pending_offers_messages: Mutex::new(Vec::new()),
12361 pending_broadcast_messages: Mutex::new(Vec::new()),
12363 entropy_source: args.entropy_source,
12364 node_signer: args.node_signer,
12365 signer_provider: args.signer_provider,
12367 logger: args.logger,
12368 default_configuration: args.default_config,
12371 for htlc_source in failed_htlcs.drain(..) {
12372 let (source, payment_hash, counterparty_node_id, channel_id) = htlc_source;
12373 let receiver = HTLCDestination::NextHopChannel { node_id: Some(counterparty_node_id), channel_id };
12374 let reason = HTLCFailReason::from_failure_code(0x4000 | 8);
12375 channel_manager.fail_htlc_backwards_internal(&source, &payment_hash, &reason, receiver);
12378 for (source, preimage, downstream_value, downstream_closed, downstream_node_id, downstream_funding, downstream_channel_id) in pending_claims_to_replay {
12379 // We use `downstream_closed` in place of `from_onchain` here just as a guess - we
12380 // don't remember in the `ChannelMonitor` where we got a preimage from, but if the
12381 // channel is closed we just assume that it probably came from an on-chain claim.
12382 channel_manager.claim_funds_internal(source, preimage, Some(downstream_value), None,
12383 downstream_closed, true, downstream_node_id, downstream_funding,
12384 downstream_channel_id, None
12388 //TODO: Broadcast channel update for closed channels, but only after we've made a
12389 //connection or two.
12391 Ok((best_block_hash.clone(), channel_manager))
12397 use bitcoin::hashes::Hash;
12398 use bitcoin::hashes::sha256::Hash as Sha256;
12399 use bitcoin::secp256k1::{PublicKey, Secp256k1, SecretKey};
12400 use core::sync::atomic::Ordering;
12401 use crate::events::{Event, HTLCDestination, MessageSendEvent, MessageSendEventsProvider, ClosureReason};
12402 use crate::ln::types::{ChannelId, PaymentPreimage, PaymentHash, PaymentSecret};
12403 use crate::ln::channelmanager::{create_recv_pending_htlc_info, HTLCForwardInfo, inbound_payment, PaymentId, PaymentSendFailure, RecipientOnionFields, InterceptId};
12404 use crate::ln::functional_test_utils::*;
12405 use crate::ln::msgs::{self, ErrorAction};
12406 use crate::ln::msgs::ChannelMessageHandler;
12407 use crate::prelude::*;
12408 use crate::routing::router::{PaymentParameters, RouteParameters, find_route};
12409 use crate::util::errors::APIError;
12410 use crate::util::ser::Writeable;
12411 use crate::util::test_utils;
12412 use crate::util::config::{ChannelConfig, ChannelConfigUpdate};
12413 use crate::sign::EntropySource;
12416 fn test_notify_limits() {
12417 // Check that a few cases which don't require the persistence of a new ChannelManager,
12418 // indeed, do not cause the persistence of a new ChannelManager.
12419 let chanmon_cfgs = create_chanmon_cfgs(3);
12420 let node_cfgs = create_node_cfgs(3, &chanmon_cfgs);
12421 let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs, &[None, None, None]);
12422 let nodes = create_network(3, &node_cfgs, &node_chanmgrs);
12424 // All nodes start with a persistable update pending as `create_network` connects each node
12425 // with all other nodes to make most tests simpler.
12426 assert!(nodes[0].node.get_event_or_persistence_needed_future().poll_is_complete());
12427 assert!(nodes[1].node.get_event_or_persistence_needed_future().poll_is_complete());
12428 assert!(nodes[2].node.get_event_or_persistence_needed_future().poll_is_complete());
12430 let mut chan = create_announced_chan_between_nodes(&nodes, 0, 1);
12432 // We check that the channel info nodes have doesn't change too early, even though we try
12433 // to connect messages with new values
12434 chan.0.contents.fee_base_msat *= 2;
12435 chan.1.contents.fee_base_msat *= 2;
12436 let node_a_chan_info = nodes[0].node.list_channels_with_counterparty(
12437 &nodes[1].node.get_our_node_id()).pop().unwrap();
12438 let node_b_chan_info = nodes[1].node.list_channels_with_counterparty(
12439 &nodes[0].node.get_our_node_id()).pop().unwrap();
12441 // The first two nodes (which opened a channel) should now require fresh persistence
12442 assert!(nodes[0].node.get_event_or_persistence_needed_future().poll_is_complete());
12443 assert!(nodes[1].node.get_event_or_persistence_needed_future().poll_is_complete());
12444 // ... but the last node should not.
12445 assert!(!nodes[2].node.get_event_or_persistence_needed_future().poll_is_complete());
12446 // After persisting the first two nodes they should no longer need fresh persistence.
12447 assert!(!nodes[0].node.get_event_or_persistence_needed_future().poll_is_complete());
12448 assert!(!nodes[1].node.get_event_or_persistence_needed_future().poll_is_complete());
12450 // Node 3, unrelated to the only channel, shouldn't care if it receives a channel_update
12451 // about the channel.
12452 nodes[2].node.handle_channel_update(&nodes[1].node.get_our_node_id(), &chan.0);
12453 nodes[2].node.handle_channel_update(&nodes[1].node.get_our_node_id(), &chan.1);
12454 assert!(!nodes[2].node.get_event_or_persistence_needed_future().poll_is_complete());
12456 // The nodes which are a party to the channel should also ignore messages from unrelated
12458 nodes[0].node.handle_channel_update(&nodes[2].node.get_our_node_id(), &chan.0);
12459 nodes[0].node.handle_channel_update(&nodes[2].node.get_our_node_id(), &chan.1);
12460 nodes[1].node.handle_channel_update(&nodes[2].node.get_our_node_id(), &chan.0);
12461 nodes[1].node.handle_channel_update(&nodes[2].node.get_our_node_id(), &chan.1);
12462 assert!(!nodes[0].node.get_event_or_persistence_needed_future().poll_is_complete());
12463 assert!(!nodes[1].node.get_event_or_persistence_needed_future().poll_is_complete());
12465 // At this point the channel info given by peers should still be the same.
12466 assert_eq!(nodes[0].node.list_channels()[0], node_a_chan_info);
12467 assert_eq!(nodes[1].node.list_channels()[0], node_b_chan_info);
12469 // An earlier version of handle_channel_update didn't check the directionality of the
12470 // update message and would always update the local fee info, even if our peer was
12471 // (spuriously) forwarding us our own channel_update.
12472 let as_node_one = nodes[0].node.get_our_node_id().serialize()[..] < nodes[1].node.get_our_node_id().serialize()[..];
12473 let as_update = if as_node_one == (chan.0.contents.flags & 1 == 0 /* chan.0 is from node one */) { &chan.0 } else { &chan.1 };
12474 let bs_update = if as_node_one == (chan.0.contents.flags & 1 == 0 /* chan.0 is from node one */) { &chan.1 } else { &chan.0 };
12476 // First deliver each peers' own message, checking that the node doesn't need to be
12477 // persisted and that its channel info remains the same.
12478 nodes[0].node.handle_channel_update(&nodes[1].node.get_our_node_id(), &as_update);
12479 nodes[1].node.handle_channel_update(&nodes[0].node.get_our_node_id(), &bs_update);
12480 assert!(!nodes[0].node.get_event_or_persistence_needed_future().poll_is_complete());
12481 assert!(!nodes[1].node.get_event_or_persistence_needed_future().poll_is_complete());
12482 assert_eq!(nodes[0].node.list_channels()[0], node_a_chan_info);
12483 assert_eq!(nodes[1].node.list_channels()[0], node_b_chan_info);
12485 // Finally, deliver the other peers' message, ensuring each node needs to be persisted and
12486 // the channel info has updated.
12487 nodes[0].node.handle_channel_update(&nodes[1].node.get_our_node_id(), &bs_update);
12488 nodes[1].node.handle_channel_update(&nodes[0].node.get_our_node_id(), &as_update);
12489 assert!(nodes[0].node.get_event_or_persistence_needed_future().poll_is_complete());
12490 assert!(nodes[1].node.get_event_or_persistence_needed_future().poll_is_complete());
12491 assert_ne!(nodes[0].node.list_channels()[0], node_a_chan_info);
12492 assert_ne!(nodes[1].node.list_channels()[0], node_b_chan_info);
12496 fn test_keysend_dup_hash_partial_mpp() {
12497 // Test that a keysend payment with a duplicate hash to an existing partial MPP payment fails as
12499 let chanmon_cfgs = create_chanmon_cfgs(2);
12500 let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
12501 let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
12502 let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
12503 create_announced_chan_between_nodes(&nodes, 0, 1);
12505 // First, send a partial MPP payment.
12506 let (route, our_payment_hash, payment_preimage, payment_secret) = get_route_and_payment_hash!(&nodes[0], nodes[1], 100_000);
12507 let mut mpp_route = route.clone();
12508 mpp_route.paths.push(mpp_route.paths[0].clone());
12510 let payment_id = PaymentId([42; 32]);
12511 // Use the utility function send_payment_along_path to send the payment with MPP data which
12512 // indicates there are more HTLCs coming.
12513 let cur_height = CHAN_CONFIRM_DEPTH + 1; // route_payment calls send_payment, which adds 1 to the current height. So we do the same here to match.
12514 let session_privs = nodes[0].node.test_add_new_pending_payment(our_payment_hash,
12515 RecipientOnionFields::secret_only(payment_secret), payment_id, &mpp_route).unwrap();
12516 nodes[0].node.test_send_payment_along_path(&mpp_route.paths[0], &our_payment_hash,
12517 RecipientOnionFields::secret_only(payment_secret), 200_000, cur_height, payment_id, &None, session_privs[0]).unwrap();
12518 check_added_monitors!(nodes[0], 1);
12519 let mut events = nodes[0].node.get_and_clear_pending_msg_events();
12520 assert_eq!(events.len(), 1);
12521 pass_along_path(&nodes[0], &[&nodes[1]], 200_000, our_payment_hash, Some(payment_secret), events.drain(..).next().unwrap(), false, None);
12523 // Next, send a keysend payment with the same payment_hash and make sure it fails.
12524 nodes[0].node.send_spontaneous_payment(&route, Some(payment_preimage),
12525 RecipientOnionFields::spontaneous_empty(), PaymentId(payment_preimage.0)).unwrap();
12526 check_added_monitors!(nodes[0], 1);
12527 let mut events = nodes[0].node.get_and_clear_pending_msg_events();
12528 assert_eq!(events.len(), 1);
12529 let ev = events.drain(..).next().unwrap();
12530 let payment_event = SendEvent::from_event(ev);
12531 nodes[1].node.handle_update_add_htlc(&nodes[0].node.get_our_node_id(), &payment_event.msgs[0]);
12532 check_added_monitors!(nodes[1], 0);
12533 commitment_signed_dance!(nodes[1], nodes[0], payment_event.commitment_msg, false);
12534 expect_pending_htlcs_forwardable!(nodes[1]);
12535 expect_pending_htlcs_forwardable_and_htlc_handling_failed!(nodes[1], vec![HTLCDestination::FailedPayment { payment_hash: our_payment_hash }]);
12536 check_added_monitors!(nodes[1], 1);
12537 let updates = get_htlc_update_msgs!(nodes[1], nodes[0].node.get_our_node_id());
12538 assert!(updates.update_add_htlcs.is_empty());
12539 assert!(updates.update_fulfill_htlcs.is_empty());
12540 assert_eq!(updates.update_fail_htlcs.len(), 1);
12541 assert!(updates.update_fail_malformed_htlcs.is_empty());
12542 assert!(updates.update_fee.is_none());
12543 nodes[0].node.handle_update_fail_htlc(&nodes[1].node.get_our_node_id(), &updates.update_fail_htlcs[0]);
12544 commitment_signed_dance!(nodes[0], nodes[1], updates.commitment_signed, true, true);
12545 expect_payment_failed!(nodes[0], our_payment_hash, true);
12547 // Send the second half of the original MPP payment.
12548 nodes[0].node.test_send_payment_along_path(&mpp_route.paths[1], &our_payment_hash,
12549 RecipientOnionFields::secret_only(payment_secret), 200_000, cur_height, payment_id, &None, session_privs[1]).unwrap();
12550 check_added_monitors!(nodes[0], 1);
12551 let mut events = nodes[0].node.get_and_clear_pending_msg_events();
12552 assert_eq!(events.len(), 1);
12553 pass_along_path(&nodes[0], &[&nodes[1]], 200_000, our_payment_hash, Some(payment_secret), events.drain(..).next().unwrap(), true, None);
12555 // Claim the full MPP payment. Note that we can't use a test utility like
12556 // claim_funds_along_route because the ordering of the messages causes the second half of the
12557 // payment to be put in the holding cell, which confuses the test utilities. So we exchange the
12558 // lightning messages manually.
12559 nodes[1].node.claim_funds(payment_preimage);
12560 expect_payment_claimed!(nodes[1], our_payment_hash, 200_000);
12561 check_added_monitors!(nodes[1], 2);
12563 let bs_first_updates = get_htlc_update_msgs!(nodes[1], nodes[0].node.get_our_node_id());
12564 nodes[0].node.handle_update_fulfill_htlc(&nodes[1].node.get_our_node_id(), &bs_first_updates.update_fulfill_htlcs[0]);
12565 expect_payment_sent(&nodes[0], payment_preimage, None, false, false);
12566 nodes[0].node.handle_commitment_signed(&nodes[1].node.get_our_node_id(), &bs_first_updates.commitment_signed);
12567 check_added_monitors!(nodes[0], 1);
12568 let (as_first_raa, as_first_cs) = get_revoke_commit_msgs!(nodes[0], nodes[1].node.get_our_node_id());
12569 nodes[1].node.handle_revoke_and_ack(&nodes[0].node.get_our_node_id(), &as_first_raa);
12570 check_added_monitors!(nodes[1], 1);
12571 let bs_second_updates = get_htlc_update_msgs!(nodes[1], nodes[0].node.get_our_node_id());
12572 nodes[1].node.handle_commitment_signed(&nodes[0].node.get_our_node_id(), &as_first_cs);
12573 check_added_monitors!(nodes[1], 1);
12574 let bs_first_raa = get_event_msg!(nodes[1], MessageSendEvent::SendRevokeAndACK, nodes[0].node.get_our_node_id());
12575 nodes[0].node.handle_update_fulfill_htlc(&nodes[1].node.get_our_node_id(), &bs_second_updates.update_fulfill_htlcs[0]);
12576 nodes[0].node.handle_commitment_signed(&nodes[1].node.get_our_node_id(), &bs_second_updates.commitment_signed);
12577 check_added_monitors!(nodes[0], 1);
12578 let as_second_raa = get_event_msg!(nodes[0], MessageSendEvent::SendRevokeAndACK, nodes[1].node.get_our_node_id());
12579 nodes[0].node.handle_revoke_and_ack(&nodes[1].node.get_our_node_id(), &bs_first_raa);
12580 let as_second_updates = get_htlc_update_msgs!(nodes[0], nodes[1].node.get_our_node_id());
12581 check_added_monitors!(nodes[0], 1);
12582 nodes[1].node.handle_revoke_and_ack(&nodes[0].node.get_our_node_id(), &as_second_raa);
12583 check_added_monitors!(nodes[1], 1);
12584 nodes[1].node.handle_commitment_signed(&nodes[0].node.get_our_node_id(), &as_second_updates.commitment_signed);
12585 check_added_monitors!(nodes[1], 1);
12586 let bs_third_raa = get_event_msg!(nodes[1], MessageSendEvent::SendRevokeAndACK, nodes[0].node.get_our_node_id());
12587 nodes[0].node.handle_revoke_and_ack(&nodes[1].node.get_our_node_id(), &bs_third_raa);
12588 check_added_monitors!(nodes[0], 1);
12590 // Note that successful MPP payments will generate a single PaymentSent event upon the first
12591 // path's success and a PaymentPathSuccessful event for each path's success.
12592 let events = nodes[0].node.get_and_clear_pending_events();
12593 assert_eq!(events.len(), 2);
12595 Event::PaymentPathSuccessful { payment_id: ref actual_payment_id, ref payment_hash, ref path } => {
12596 assert_eq!(payment_id, *actual_payment_id);
12597 assert_eq!(our_payment_hash, *payment_hash.as_ref().unwrap());
12598 assert_eq!(route.paths[0], *path);
12600 _ => panic!("Unexpected event"),
12603 Event::PaymentPathSuccessful { payment_id: ref actual_payment_id, ref payment_hash, ref path } => {
12604 assert_eq!(payment_id, *actual_payment_id);
12605 assert_eq!(our_payment_hash, *payment_hash.as_ref().unwrap());
12606 assert_eq!(route.paths[0], *path);
12608 _ => panic!("Unexpected event"),
12613 fn test_keysend_dup_payment_hash() {
12614 do_test_keysend_dup_payment_hash(false);
12615 do_test_keysend_dup_payment_hash(true);
12618 fn do_test_keysend_dup_payment_hash(accept_mpp_keysend: bool) {
12619 // (1): Test that a keysend payment with a duplicate payment hash to an existing pending
12620 // outbound regular payment fails as expected.
12621 // (2): Test that a regular payment with a duplicate payment hash to an existing keysend payment
12622 // fails as expected.
12623 // (3): Test that a keysend payment with a duplicate payment hash to an existing keysend
12624 // payment fails as expected. When `accept_mpp_keysend` is false, this tests that we
12625 // reject MPP keysend payments, since in this case where the payment has no payment
12626 // secret, a keysend payment with a duplicate hash is basically an MPP keysend. If
12627 // `accept_mpp_keysend` is true, this tests that we only accept MPP keysends with
12628 // payment secrets and reject otherwise.
12629 let chanmon_cfgs = create_chanmon_cfgs(2);
12630 let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
12631 let mut mpp_keysend_cfg = test_default_channel_config();
12632 mpp_keysend_cfg.accept_mpp_keysend = accept_mpp_keysend;
12633 let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, Some(mpp_keysend_cfg)]);
12634 let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
12635 create_announced_chan_between_nodes(&nodes, 0, 1);
12636 let scorer = test_utils::TestScorer::new();
12637 let random_seed_bytes = chanmon_cfgs[1].keys_manager.get_secure_random_bytes();
12639 // To start (1), send a regular payment but don't claim it.
12640 let expected_route = [&nodes[1]];
12641 let (payment_preimage, payment_hash, ..) = route_payment(&nodes[0], &expected_route, 100_000);
12643 // Next, attempt a keysend payment and make sure it fails.
12644 let route_params = RouteParameters::from_payment_params_and_value(
12645 PaymentParameters::for_keysend(expected_route.last().unwrap().node.get_our_node_id(),
12646 TEST_FINAL_CLTV, false), 100_000);
12647 let route = find_route(
12648 &nodes[0].node.get_our_node_id(), &route_params, &nodes[0].network_graph,
12649 None, nodes[0].logger, &scorer, &Default::default(), &random_seed_bytes
12651 nodes[0].node.send_spontaneous_payment(&route, Some(payment_preimage),
12652 RecipientOnionFields::spontaneous_empty(), PaymentId(payment_preimage.0)).unwrap();
12653 check_added_monitors!(nodes[0], 1);
12654 let mut events = nodes[0].node.get_and_clear_pending_msg_events();
12655 assert_eq!(events.len(), 1);
12656 let ev = events.drain(..).next().unwrap();
12657 let payment_event = SendEvent::from_event(ev);
12658 nodes[1].node.handle_update_add_htlc(&nodes[0].node.get_our_node_id(), &payment_event.msgs[0]);
12659 check_added_monitors!(nodes[1], 0);
12660 commitment_signed_dance!(nodes[1], nodes[0], payment_event.commitment_msg, false);
12661 // We have to forward pending HTLCs twice - once tries to forward the payment forward (and
12662 // fails), the second will process the resulting failure and fail the HTLC backward
12663 expect_pending_htlcs_forwardable!(nodes[1]);
12664 expect_pending_htlcs_forwardable_and_htlc_handling_failed!(nodes[1], vec![HTLCDestination::FailedPayment { payment_hash }]);
12665 check_added_monitors!(nodes[1], 1);
12666 let updates = get_htlc_update_msgs!(nodes[1], nodes[0].node.get_our_node_id());
12667 assert!(updates.update_add_htlcs.is_empty());
12668 assert!(updates.update_fulfill_htlcs.is_empty());
12669 assert_eq!(updates.update_fail_htlcs.len(), 1);
12670 assert!(updates.update_fail_malformed_htlcs.is_empty());
12671 assert!(updates.update_fee.is_none());
12672 nodes[0].node.handle_update_fail_htlc(&nodes[1].node.get_our_node_id(), &updates.update_fail_htlcs[0]);
12673 commitment_signed_dance!(nodes[0], nodes[1], updates.commitment_signed, true, true);
12674 expect_payment_failed!(nodes[0], payment_hash, true);
12676 // Finally, claim the original payment.
12677 claim_payment(&nodes[0], &expected_route, payment_preimage);
12679 // To start (2), send a keysend payment but don't claim it.
12680 let payment_preimage = PaymentPreimage([42; 32]);
12681 let route = find_route(
12682 &nodes[0].node.get_our_node_id(), &route_params, &nodes[0].network_graph,
12683 None, nodes[0].logger, &scorer, &Default::default(), &random_seed_bytes
12685 let payment_hash = nodes[0].node.send_spontaneous_payment(&route, Some(payment_preimage),
12686 RecipientOnionFields::spontaneous_empty(), PaymentId(payment_preimage.0)).unwrap();
12687 check_added_monitors!(nodes[0], 1);
12688 let mut events = nodes[0].node.get_and_clear_pending_msg_events();
12689 assert_eq!(events.len(), 1);
12690 let event = events.pop().unwrap();
12691 let path = vec![&nodes[1]];
12692 pass_along_path(&nodes[0], &path, 100_000, payment_hash, None, event, true, Some(payment_preimage));
12694 // Next, attempt a regular payment and make sure it fails.
12695 let payment_secret = PaymentSecret([43; 32]);
12696 nodes[0].node.send_payment_with_route(&route, payment_hash,
12697 RecipientOnionFields::secret_only(payment_secret), PaymentId(payment_hash.0)).unwrap();
12698 check_added_monitors!(nodes[0], 1);
12699 let mut events = nodes[0].node.get_and_clear_pending_msg_events();
12700 assert_eq!(events.len(), 1);
12701 let ev = events.drain(..).next().unwrap();
12702 let payment_event = SendEvent::from_event(ev);
12703 nodes[1].node.handle_update_add_htlc(&nodes[0].node.get_our_node_id(), &payment_event.msgs[0]);
12704 check_added_monitors!(nodes[1], 0);
12705 commitment_signed_dance!(nodes[1], nodes[0], payment_event.commitment_msg, false);
12706 expect_pending_htlcs_forwardable!(nodes[1]);
12707 expect_pending_htlcs_forwardable_and_htlc_handling_failed!(nodes[1], vec![HTLCDestination::FailedPayment { payment_hash }]);
12708 check_added_monitors!(nodes[1], 1);
12709 let updates = get_htlc_update_msgs!(nodes[1], nodes[0].node.get_our_node_id());
12710 assert!(updates.update_add_htlcs.is_empty());
12711 assert!(updates.update_fulfill_htlcs.is_empty());
12712 assert_eq!(updates.update_fail_htlcs.len(), 1);
12713 assert!(updates.update_fail_malformed_htlcs.is_empty());
12714 assert!(updates.update_fee.is_none());
12715 nodes[0].node.handle_update_fail_htlc(&nodes[1].node.get_our_node_id(), &updates.update_fail_htlcs[0]);
12716 commitment_signed_dance!(nodes[0], nodes[1], updates.commitment_signed, true, true);
12717 expect_payment_failed!(nodes[0], payment_hash, true);
12719 // Finally, succeed the keysend payment.
12720 claim_payment(&nodes[0], &expected_route, payment_preimage);
12722 // To start (3), send a keysend payment but don't claim it.
12723 let payment_id_1 = PaymentId([44; 32]);
12724 let payment_hash = nodes[0].node.send_spontaneous_payment(&route, Some(payment_preimage),
12725 RecipientOnionFields::spontaneous_empty(), payment_id_1).unwrap();
12726 check_added_monitors!(nodes[0], 1);
12727 let mut events = nodes[0].node.get_and_clear_pending_msg_events();
12728 assert_eq!(events.len(), 1);
12729 let event = events.pop().unwrap();
12730 let path = vec![&nodes[1]];
12731 pass_along_path(&nodes[0], &path, 100_000, payment_hash, None, event, true, Some(payment_preimage));
12733 // Next, attempt a keysend payment and make sure it fails.
12734 let route_params = RouteParameters::from_payment_params_and_value(
12735 PaymentParameters::for_keysend(expected_route.last().unwrap().node.get_our_node_id(), TEST_FINAL_CLTV, false),
12738 let route = find_route(
12739 &nodes[0].node.get_our_node_id(), &route_params, &nodes[0].network_graph,
12740 None, nodes[0].logger, &scorer, &Default::default(), &random_seed_bytes
12742 let payment_id_2 = PaymentId([45; 32]);
12743 nodes[0].node.send_spontaneous_payment(&route, Some(payment_preimage),
12744 RecipientOnionFields::spontaneous_empty(), payment_id_2).unwrap();
12745 check_added_monitors!(nodes[0], 1);
12746 let mut events = nodes[0].node.get_and_clear_pending_msg_events();
12747 assert_eq!(events.len(), 1);
12748 let ev = events.drain(..).next().unwrap();
12749 let payment_event = SendEvent::from_event(ev);
12750 nodes[1].node.handle_update_add_htlc(&nodes[0].node.get_our_node_id(), &payment_event.msgs[0]);
12751 check_added_monitors!(nodes[1], 0);
12752 commitment_signed_dance!(nodes[1], nodes[0], payment_event.commitment_msg, false);
12753 expect_pending_htlcs_forwardable!(nodes[1]);
12754 expect_pending_htlcs_forwardable_and_htlc_handling_failed!(nodes[1], vec![HTLCDestination::FailedPayment { payment_hash }]);
12755 check_added_monitors!(nodes[1], 1);
12756 let updates = get_htlc_update_msgs!(nodes[1], nodes[0].node.get_our_node_id());
12757 assert!(updates.update_add_htlcs.is_empty());
12758 assert!(updates.update_fulfill_htlcs.is_empty());
12759 assert_eq!(updates.update_fail_htlcs.len(), 1);
12760 assert!(updates.update_fail_malformed_htlcs.is_empty());
12761 assert!(updates.update_fee.is_none());
12762 nodes[0].node.handle_update_fail_htlc(&nodes[1].node.get_our_node_id(), &updates.update_fail_htlcs[0]);
12763 commitment_signed_dance!(nodes[0], nodes[1], updates.commitment_signed, true, true);
12764 expect_payment_failed!(nodes[0], payment_hash, true);
12766 // Finally, claim the original payment.
12767 claim_payment(&nodes[0], &expected_route, payment_preimage);
12771 fn test_keysend_hash_mismatch() {
12772 // Test that if we receive a keysend `update_add_htlc` msg, we fail as expected if the keysend
12773 // preimage doesn't match the msg's payment hash.
12774 let chanmon_cfgs = create_chanmon_cfgs(2);
12775 let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
12776 let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
12777 let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
12779 let payer_pubkey = nodes[0].node.get_our_node_id();
12780 let payee_pubkey = nodes[1].node.get_our_node_id();
12782 let _chan = create_chan_between_nodes(&nodes[0], &nodes[1]);
12783 let route_params = RouteParameters::from_payment_params_and_value(
12784 PaymentParameters::for_keysend(payee_pubkey, 40, false), 10_000);
12785 let network_graph = nodes[0].network_graph;
12786 let first_hops = nodes[0].node.list_usable_channels();
12787 let scorer = test_utils::TestScorer::new();
12788 let random_seed_bytes = chanmon_cfgs[1].keys_manager.get_secure_random_bytes();
12789 let route = find_route(
12790 &payer_pubkey, &route_params, &network_graph, Some(&first_hops.iter().collect::<Vec<_>>()),
12791 nodes[0].logger, &scorer, &Default::default(), &random_seed_bytes
12794 let test_preimage = PaymentPreimage([42; 32]);
12795 let mismatch_payment_hash = PaymentHash([43; 32]);
12796 let session_privs = nodes[0].node.test_add_new_pending_payment(mismatch_payment_hash,
12797 RecipientOnionFields::spontaneous_empty(), PaymentId(mismatch_payment_hash.0), &route).unwrap();
12798 nodes[0].node.test_send_payment_internal(&route, mismatch_payment_hash,
12799 RecipientOnionFields::spontaneous_empty(), Some(test_preimage), PaymentId(mismatch_payment_hash.0), None, session_privs).unwrap();
12800 check_added_monitors!(nodes[0], 1);
12802 let updates = get_htlc_update_msgs!(nodes[0], nodes[1].node.get_our_node_id());
12803 assert_eq!(updates.update_add_htlcs.len(), 1);
12804 assert!(updates.update_fulfill_htlcs.is_empty());
12805 assert!(updates.update_fail_htlcs.is_empty());
12806 assert!(updates.update_fail_malformed_htlcs.is_empty());
12807 assert!(updates.update_fee.is_none());
12808 nodes[1].node.handle_update_add_htlc(&nodes[0].node.get_our_node_id(), &updates.update_add_htlcs[0]);
12810 nodes[1].logger.assert_log_contains("lightning::ln::channelmanager", "Payment preimage didn't match payment hash", 1);
12814 fn test_keysend_msg_with_secret_err() {
12815 // Test that we error as expected if we receive a keysend payment that includes a payment
12816 // secret when we don't support MPP keysend.
12817 let mut reject_mpp_keysend_cfg = test_default_channel_config();
12818 reject_mpp_keysend_cfg.accept_mpp_keysend = false;
12819 let chanmon_cfgs = create_chanmon_cfgs(2);
12820 let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
12821 let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, Some(reject_mpp_keysend_cfg)]);
12822 let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
12824 let payer_pubkey = nodes[0].node.get_our_node_id();
12825 let payee_pubkey = nodes[1].node.get_our_node_id();
12827 let _chan = create_chan_between_nodes(&nodes[0], &nodes[1]);
12828 let route_params = RouteParameters::from_payment_params_and_value(
12829 PaymentParameters::for_keysend(payee_pubkey, 40, false), 10_000);
12830 let network_graph = nodes[0].network_graph;
12831 let first_hops = nodes[0].node.list_usable_channels();
12832 let scorer = test_utils::TestScorer::new();
12833 let random_seed_bytes = chanmon_cfgs[1].keys_manager.get_secure_random_bytes();
12834 let route = find_route(
12835 &payer_pubkey, &route_params, &network_graph, Some(&first_hops.iter().collect::<Vec<_>>()),
12836 nodes[0].logger, &scorer, &Default::default(), &random_seed_bytes
12839 let test_preimage = PaymentPreimage([42; 32]);
12840 let test_secret = PaymentSecret([43; 32]);
12841 let payment_hash = PaymentHash(Sha256::hash(&test_preimage.0).to_byte_array());
12842 let session_privs = nodes[0].node.test_add_new_pending_payment(payment_hash,
12843 RecipientOnionFields::secret_only(test_secret), PaymentId(payment_hash.0), &route).unwrap();
12844 nodes[0].node.test_send_payment_internal(&route, payment_hash,
12845 RecipientOnionFields::secret_only(test_secret), Some(test_preimage),
12846 PaymentId(payment_hash.0), None, session_privs).unwrap();
12847 check_added_monitors!(nodes[0], 1);
12849 let updates = get_htlc_update_msgs!(nodes[0], nodes[1].node.get_our_node_id());
12850 assert_eq!(updates.update_add_htlcs.len(), 1);
12851 assert!(updates.update_fulfill_htlcs.is_empty());
12852 assert!(updates.update_fail_htlcs.is_empty());
12853 assert!(updates.update_fail_malformed_htlcs.is_empty());
12854 assert!(updates.update_fee.is_none());
12855 nodes[1].node.handle_update_add_htlc(&nodes[0].node.get_our_node_id(), &updates.update_add_htlcs[0]);
12857 nodes[1].logger.assert_log_contains("lightning::ln::channelmanager", "We don't support MPP keysend payments", 1);
12861 fn test_multi_hop_missing_secret() {
12862 let chanmon_cfgs = create_chanmon_cfgs(4);
12863 let node_cfgs = create_node_cfgs(4, &chanmon_cfgs);
12864 let node_chanmgrs = create_node_chanmgrs(4, &node_cfgs, &[None, None, None, None]);
12865 let nodes = create_network(4, &node_cfgs, &node_chanmgrs);
12867 let chan_1_id = create_announced_chan_between_nodes(&nodes, 0, 1).0.contents.short_channel_id;
12868 let chan_2_id = create_announced_chan_between_nodes(&nodes, 0, 2).0.contents.short_channel_id;
12869 let chan_3_id = create_announced_chan_between_nodes(&nodes, 1, 3).0.contents.short_channel_id;
12870 let chan_4_id = create_announced_chan_between_nodes(&nodes, 2, 3).0.contents.short_channel_id;
12872 // Marshall an MPP route.
12873 let (mut route, payment_hash, _, _) = get_route_and_payment_hash!(&nodes[0], nodes[3], 100000);
12874 let path = route.paths[0].clone();
12875 route.paths.push(path);
12876 route.paths[0].hops[0].pubkey = nodes[1].node.get_our_node_id();
12877 route.paths[0].hops[0].short_channel_id = chan_1_id;
12878 route.paths[0].hops[1].short_channel_id = chan_3_id;
12879 route.paths[1].hops[0].pubkey = nodes[2].node.get_our_node_id();
12880 route.paths[1].hops[0].short_channel_id = chan_2_id;
12881 route.paths[1].hops[1].short_channel_id = chan_4_id;
12883 match nodes[0].node.send_payment_with_route(&route, payment_hash,
12884 RecipientOnionFields::spontaneous_empty(), PaymentId(payment_hash.0))
12886 PaymentSendFailure::ParameterError(APIError::APIMisuseError { ref err }) => {
12887 assert!(regex::Regex::new(r"Payment secret is required for multi-path payments").unwrap().is_match(err))
12889 _ => panic!("unexpected error")
12894 fn test_channel_update_cached() {
12895 let chanmon_cfgs = create_chanmon_cfgs(3);
12896 let node_cfgs = create_node_cfgs(3, &chanmon_cfgs);
12897 let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs, &[None, None, None]);
12898 let nodes = create_network(3, &node_cfgs, &node_chanmgrs);
12900 let chan = create_announced_chan_between_nodes(&nodes, 0, 1);
12902 nodes[0].node.force_close_channel_with_peer(&chan.2, &nodes[1].node.get_our_node_id(), None, true).unwrap();
12903 check_added_monitors!(nodes[0], 1);
12904 check_closed_event!(nodes[0], 1, ClosureReason::HolderForceClosed, [nodes[1].node.get_our_node_id()], 100000);
12906 // Confirm that the channel_update was not sent immediately to node[1] but was cached.
12907 let node_1_events = nodes[1].node.get_and_clear_pending_msg_events();
12908 assert_eq!(node_1_events.len(), 0);
12911 // Assert that ChannelUpdate message has been added to node[0] pending broadcast messages
12912 let pending_broadcast_messages= nodes[0].node.pending_broadcast_messages.lock().unwrap();
12913 assert_eq!(pending_broadcast_messages.len(), 1);
12916 // Test that we do not retrieve the pending broadcast messages when we are not connected to any peer
12917 nodes[0].node.peer_disconnected(&nodes[1].node.get_our_node_id());
12918 nodes[1].node.peer_disconnected(&nodes[0].node.get_our_node_id());
12920 nodes[0].node.peer_disconnected(&nodes[2].node.get_our_node_id());
12921 nodes[2].node.peer_disconnected(&nodes[0].node.get_our_node_id());
12923 let node_0_events = nodes[0].node.get_and_clear_pending_msg_events();
12924 assert_eq!(node_0_events.len(), 0);
12926 // Now we reconnect to a peer
12927 nodes[0].node.peer_connected(&nodes[2].node.get_our_node_id(), &msgs::Init {
12928 features: nodes[2].node.init_features(), networks: None, remote_network_address: None
12930 nodes[2].node.peer_connected(&nodes[0].node.get_our_node_id(), &msgs::Init {
12931 features: nodes[0].node.init_features(), networks: None, remote_network_address: None
12932 }, false).unwrap();
12934 // Confirm that get_and_clear_pending_msg_events correctly captures pending broadcast messages
12935 let node_0_events = nodes[0].node.get_and_clear_pending_msg_events();
12936 assert_eq!(node_0_events.len(), 1);
12937 match &node_0_events[0] {
12938 MessageSendEvent::BroadcastChannelUpdate { .. } => (),
12939 _ => panic!("Unexpected event"),
12942 // Assert that ChannelUpdate message has been cleared from nodes[0] pending broadcast messages
12943 let pending_broadcast_messages= nodes[0].node.pending_broadcast_messages.lock().unwrap();
12944 assert_eq!(pending_broadcast_messages.len(), 0);
12949 fn test_drop_disconnected_peers_when_removing_channels() {
12950 let chanmon_cfgs = create_chanmon_cfgs(2);
12951 let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
12952 let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
12953 let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
12955 let chan = create_announced_chan_between_nodes(&nodes, 0, 1);
12957 nodes[0].node.peer_disconnected(&nodes[1].node.get_our_node_id());
12958 nodes[1].node.peer_disconnected(&nodes[0].node.get_our_node_id());
12960 nodes[0].node.force_close_broadcasting_latest_txn(&chan.2, &nodes[1].node.get_our_node_id()).unwrap();
12961 check_closed_broadcast!(nodes[0], true);
12962 check_added_monitors!(nodes[0], 1);
12963 check_closed_event!(nodes[0], 1, ClosureReason::HolderForceClosed, [nodes[1].node.get_our_node_id()], 100000);
12966 // Assert that nodes[1] is awaiting removal for nodes[0] once nodes[1] has been
12967 // disconnected and the channel between has been force closed.
12968 let nodes_0_per_peer_state = nodes[0].node.per_peer_state.read().unwrap();
12969 // Assert that nodes[1] isn't removed before `timer_tick_occurred` has been executed.
12970 assert_eq!(nodes_0_per_peer_state.len(), 1);
12971 assert!(nodes_0_per_peer_state.get(&nodes[1].node.get_our_node_id()).is_some());
12974 nodes[0].node.timer_tick_occurred();
12977 // Assert that nodes[1] has now been removed.
12978 assert_eq!(nodes[0].node.per_peer_state.read().unwrap().len(), 0);
12983 fn bad_inbound_payment_hash() {
12984 // Add coverage for checking that a user-provided payment hash matches the payment secret.
12985 let chanmon_cfgs = create_chanmon_cfgs(2);
12986 let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
12987 let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
12988 let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
12990 let (_, payment_hash, payment_secret) = get_payment_preimage_hash!(&nodes[0]);
12991 let payment_data = msgs::FinalOnionHopData {
12993 total_msat: 100_000,
12996 // Ensure that if the payment hash given to `inbound_payment::verify` differs from the original,
12997 // payment verification fails as expected.
12998 let mut bad_payment_hash = payment_hash.clone();
12999 bad_payment_hash.0[0] += 1;
13000 match inbound_payment::verify(bad_payment_hash, &payment_data, nodes[0].node.highest_seen_timestamp.load(Ordering::Acquire) as u64, &nodes[0].node.inbound_payment_key, &nodes[0].logger) {
13001 Ok(_) => panic!("Unexpected ok"),
13003 nodes[0].logger.assert_log_contains("lightning::ln::inbound_payment", "Failing HTLC with user-generated payment_hash", 1);
13007 // Check that using the original payment hash succeeds.
13008 assert!(inbound_payment::verify(payment_hash, &payment_data, nodes[0].node.highest_seen_timestamp.load(Ordering::Acquire) as u64, &nodes[0].node.inbound_payment_key, &nodes[0].logger).is_ok());
13012 fn test_outpoint_to_peer_coverage() {
13013 // Test that the `ChannelManager:outpoint_to_peer` contains channels which have been assigned
13014 // a `channel_id` (i.e. have had the funding tx created), and that they are removed once
13015 // the channel is successfully closed.
13016 let chanmon_cfgs = create_chanmon_cfgs(2);
13017 let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
13018 let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
13019 let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
13021 nodes[0].node.create_channel(nodes[1].node.get_our_node_id(), 1_000_000, 500_000_000, 42, None, None).unwrap();
13022 let open_channel = get_event_msg!(nodes[0], MessageSendEvent::SendOpenChannel, nodes[1].node.get_our_node_id());
13023 nodes[1].node.handle_open_channel(&nodes[0].node.get_our_node_id(), &open_channel);
13024 let accept_channel = get_event_msg!(nodes[1], MessageSendEvent::SendAcceptChannel, nodes[0].node.get_our_node_id());
13025 nodes[0].node.handle_accept_channel(&nodes[1].node.get_our_node_id(), &accept_channel);
13027 let (temporary_channel_id, tx, funding_output) = create_funding_transaction(&nodes[0], &nodes[1].node.get_our_node_id(), 1_000_000, 42);
13028 let channel_id = ChannelId::from_bytes(tx.txid().to_byte_array());
13030 // Ensure that the `outpoint_to_peer` map is empty until either party has received the
13031 // funding transaction, and have the real `channel_id`.
13032 assert_eq!(nodes[0].node.outpoint_to_peer.lock().unwrap().len(), 0);
13033 assert_eq!(nodes[1].node.outpoint_to_peer.lock().unwrap().len(), 0);
13036 nodes[0].node.funding_transaction_generated(&temporary_channel_id, &nodes[1].node.get_our_node_id(), tx.clone()).unwrap();
13038 // Assert that `nodes[0]`'s `outpoint_to_peer` map is populated with the channel as soon as
13039 // as it has the funding transaction.
13040 let nodes_0_lock = nodes[0].node.outpoint_to_peer.lock().unwrap();
13041 assert_eq!(nodes_0_lock.len(), 1);
13042 assert!(nodes_0_lock.contains_key(&funding_output));
13045 assert_eq!(nodes[1].node.outpoint_to_peer.lock().unwrap().len(), 0);
13047 let funding_created_msg = get_event_msg!(nodes[0], MessageSendEvent::SendFundingCreated, nodes[1].node.get_our_node_id());
13049 nodes[1].node.handle_funding_created(&nodes[0].node.get_our_node_id(), &funding_created_msg);
13051 let nodes_0_lock = nodes[0].node.outpoint_to_peer.lock().unwrap();
13052 assert_eq!(nodes_0_lock.len(), 1);
13053 assert!(nodes_0_lock.contains_key(&funding_output));
13055 expect_channel_pending_event(&nodes[1], &nodes[0].node.get_our_node_id());
13058 // Assert that `nodes[1]`'s `outpoint_to_peer` map is populated with the channel as
13059 // soon as it has the funding transaction.
13060 let nodes_1_lock = nodes[1].node.outpoint_to_peer.lock().unwrap();
13061 assert_eq!(nodes_1_lock.len(), 1);
13062 assert!(nodes_1_lock.contains_key(&funding_output));
13064 check_added_monitors!(nodes[1], 1);
13065 let funding_signed = get_event_msg!(nodes[1], MessageSendEvent::SendFundingSigned, nodes[0].node.get_our_node_id());
13066 nodes[0].node.handle_funding_signed(&nodes[1].node.get_our_node_id(), &funding_signed);
13067 check_added_monitors!(nodes[0], 1);
13068 expect_channel_pending_event(&nodes[0], &nodes[1].node.get_our_node_id());
13069 let (channel_ready, _) = create_chan_between_nodes_with_value_confirm(&nodes[0], &nodes[1], &tx);
13070 let (announcement, nodes_0_update, nodes_1_update) = create_chan_between_nodes_with_value_b(&nodes[0], &nodes[1], &channel_ready);
13071 update_nodes_with_chan_announce(&nodes, 0, 1, &announcement, &nodes_0_update, &nodes_1_update);
13073 nodes[0].node.close_channel(&channel_id, &nodes[1].node.get_our_node_id()).unwrap();
13074 nodes[1].node.handle_shutdown(&nodes[0].node.get_our_node_id(), &get_event_msg!(nodes[0], MessageSendEvent::SendShutdown, nodes[1].node.get_our_node_id()));
13075 let nodes_1_shutdown = get_event_msg!(nodes[1], MessageSendEvent::SendShutdown, nodes[0].node.get_our_node_id());
13076 nodes[0].node.handle_shutdown(&nodes[1].node.get_our_node_id(), &nodes_1_shutdown);
13078 let closing_signed_node_0 = get_event_msg!(nodes[0], MessageSendEvent::SendClosingSigned, nodes[1].node.get_our_node_id());
13079 nodes[1].node.handle_closing_signed(&nodes[0].node.get_our_node_id(), &closing_signed_node_0);
13081 // Assert that the channel is kept in the `outpoint_to_peer` map for both nodes until the
13082 // channel can be fully closed by both parties (i.e. no outstanding htlcs exists, the
13083 // fee for the closing transaction has been negotiated and the parties has the other
13084 // party's signature for the fee negotiated closing transaction.)
13085 let nodes_0_lock = nodes[0].node.outpoint_to_peer.lock().unwrap();
13086 assert_eq!(nodes_0_lock.len(), 1);
13087 assert!(nodes_0_lock.contains_key(&funding_output));
13091 // At this stage, `nodes[1]` has proposed a fee for the closing transaction in the
13092 // `handle_closing_signed` call above. As `nodes[1]` has not yet received the signature
13093 // from `nodes[0]` for the closing transaction with the proposed fee, the channel is
13094 // kept in the `nodes[1]`'s `outpoint_to_peer` map.
13095 let nodes_1_lock = nodes[1].node.outpoint_to_peer.lock().unwrap();
13096 assert_eq!(nodes_1_lock.len(), 1);
13097 assert!(nodes_1_lock.contains_key(&funding_output));
13100 nodes[0].node.handle_closing_signed(&nodes[1].node.get_our_node_id(), &get_event_msg!(nodes[1], MessageSendEvent::SendClosingSigned, nodes[0].node.get_our_node_id()));
13102 // `nodes[0]` accepts `nodes[1]`'s proposed fee for the closing transaction, and
13103 // therefore has all it needs to fully close the channel (both signatures for the
13104 // closing transaction).
13105 // Assert that the channel is removed from `nodes[0]`'s `outpoint_to_peer` map as it can be
13106 // fully closed by `nodes[0]`.
13107 assert_eq!(nodes[0].node.outpoint_to_peer.lock().unwrap().len(), 0);
13109 // Assert that the channel is still in `nodes[1]`'s `outpoint_to_peer` map, as `nodes[1]`
13110 // doesn't have `nodes[0]`'s signature for the closing transaction yet.
13111 let nodes_1_lock = nodes[1].node.outpoint_to_peer.lock().unwrap();
13112 assert_eq!(nodes_1_lock.len(), 1);
13113 assert!(nodes_1_lock.contains_key(&funding_output));
13116 let (_nodes_0_update, closing_signed_node_0) = get_closing_signed_broadcast!(nodes[0].node, nodes[1].node.get_our_node_id());
13118 nodes[1].node.handle_closing_signed(&nodes[0].node.get_our_node_id(), &closing_signed_node_0.unwrap());
13120 // Assert that the channel has now been removed from both parties `outpoint_to_peer` map once
13121 // they both have everything required to fully close the channel.
13122 assert_eq!(nodes[1].node.outpoint_to_peer.lock().unwrap().len(), 0);
13124 let (_nodes_1_update, _none) = get_closing_signed_broadcast!(nodes[1].node, nodes[0].node.get_our_node_id());
13126 check_closed_event!(nodes[0], 1, ClosureReason::LocallyInitiatedCooperativeClosure, [nodes[1].node.get_our_node_id()], 1000000);
13127 check_closed_event!(nodes[1], 1, ClosureReason::CounterpartyInitiatedCooperativeClosure, [nodes[0].node.get_our_node_id()], 1000000);
13130 fn check_not_connected_to_peer_error<T>(res_err: Result<T, APIError>, expected_public_key: PublicKey) {
13131 let expected_message = format!("Not connected to node: {}", expected_public_key);
13132 check_api_error_message(expected_message, res_err)
13135 fn check_unkown_peer_error<T>(res_err: Result<T, APIError>, expected_public_key: PublicKey) {
13136 let expected_message = format!("Can't find a peer matching the passed counterparty node_id {}", expected_public_key);
13137 check_api_error_message(expected_message, res_err)
13140 fn check_channel_unavailable_error<T>(res_err: Result<T, APIError>, expected_channel_id: ChannelId, peer_node_id: PublicKey) {
13141 let expected_message = format!("Channel with id {} not found for the passed counterparty node_id {}", expected_channel_id, peer_node_id);
13142 check_api_error_message(expected_message, res_err)
13145 fn check_api_misuse_error<T>(res_err: Result<T, APIError>) {
13146 let expected_message = "No such channel awaiting to be accepted.".to_string();
13147 check_api_error_message(expected_message, res_err)
13150 fn check_api_error_message<T>(expected_err_message: String, res_err: Result<T, APIError>) {
13152 Err(APIError::APIMisuseError { err }) => {
13153 assert_eq!(err, expected_err_message);
13155 Err(APIError::ChannelUnavailable { err }) => {
13156 assert_eq!(err, expected_err_message);
13158 Ok(_) => panic!("Unexpected Ok"),
13159 Err(_) => panic!("Unexpected Error"),
13164 fn test_api_calls_with_unkown_counterparty_node() {
13165 // Tests that our API functions that expects a `counterparty_node_id` as input, behaves as
13166 // expected if the `counterparty_node_id` is an unkown peer in the
13167 // `ChannelManager::per_peer_state` map.
13168 let chanmon_cfg = create_chanmon_cfgs(2);
13169 let node_cfg = create_node_cfgs(2, &chanmon_cfg);
13170 let node_chanmgr = create_node_chanmgrs(2, &node_cfg, &[None, None]);
13171 let nodes = create_network(2, &node_cfg, &node_chanmgr);
13174 let channel_id = ChannelId::from_bytes([4; 32]);
13175 let unkown_public_key = PublicKey::from_secret_key(&Secp256k1::signing_only(), &SecretKey::from_slice(&[42; 32]).unwrap());
13176 let intercept_id = InterceptId([0; 32]);
13178 // Test the API functions.
13179 check_not_connected_to_peer_error(nodes[0].node.create_channel(unkown_public_key, 1_000_000, 500_000_000, 42, None, None), unkown_public_key);
13181 check_unkown_peer_error(nodes[0].node.accept_inbound_channel(&channel_id, &unkown_public_key, 42), unkown_public_key);
13183 check_unkown_peer_error(nodes[0].node.close_channel(&channel_id, &unkown_public_key), unkown_public_key);
13185 check_unkown_peer_error(nodes[0].node.force_close_broadcasting_latest_txn(&channel_id, &unkown_public_key), unkown_public_key);
13187 check_unkown_peer_error(nodes[0].node.force_close_without_broadcasting_txn(&channel_id, &unkown_public_key), unkown_public_key);
13189 check_unkown_peer_error(nodes[0].node.forward_intercepted_htlc(intercept_id, &channel_id, unkown_public_key, 1_000_000), unkown_public_key);
13191 check_unkown_peer_error(nodes[0].node.update_channel_config(&unkown_public_key, &[channel_id], &ChannelConfig::default()), unkown_public_key);
13195 fn test_api_calls_with_unavailable_channel() {
13196 // Tests that our API functions that expects a `counterparty_node_id` and a `channel_id`
13197 // as input, behaves as expected if the `counterparty_node_id` is a known peer in the
13198 // `ChannelManager::per_peer_state` map, but the peer state doesn't contain a channel with
13199 // the given `channel_id`.
13200 let chanmon_cfg = create_chanmon_cfgs(2);
13201 let node_cfg = create_node_cfgs(2, &chanmon_cfg);
13202 let node_chanmgr = create_node_chanmgrs(2, &node_cfg, &[None, None]);
13203 let nodes = create_network(2, &node_cfg, &node_chanmgr);
13205 let counterparty_node_id = nodes[1].node.get_our_node_id();
13208 let channel_id = ChannelId::from_bytes([4; 32]);
13210 // Test the API functions.
13211 check_api_misuse_error(nodes[0].node.accept_inbound_channel(&channel_id, &counterparty_node_id, 42));
13213 check_channel_unavailable_error(nodes[0].node.close_channel(&channel_id, &counterparty_node_id), channel_id, counterparty_node_id);
13215 check_channel_unavailable_error(nodes[0].node.force_close_broadcasting_latest_txn(&channel_id, &counterparty_node_id), channel_id, counterparty_node_id);
13217 check_channel_unavailable_error(nodes[0].node.force_close_without_broadcasting_txn(&channel_id, &counterparty_node_id), channel_id, counterparty_node_id);
13219 check_channel_unavailable_error(nodes[0].node.forward_intercepted_htlc(InterceptId([0; 32]), &channel_id, counterparty_node_id, 1_000_000), channel_id, counterparty_node_id);
13221 check_channel_unavailable_error(nodes[0].node.update_channel_config(&counterparty_node_id, &[channel_id], &ChannelConfig::default()), channel_id, counterparty_node_id);
13225 fn test_connection_limiting() {
13226 // Test that we limit un-channel'd peers and un-funded channels properly.
13227 let chanmon_cfgs = create_chanmon_cfgs(2);
13228 let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
13229 let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
13230 let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
13232 // Note that create_network connects the nodes together for us
13234 nodes[0].node.create_channel(nodes[1].node.get_our_node_id(), 100_000, 0, 42, None, None).unwrap();
13235 let mut open_channel_msg = get_event_msg!(nodes[0], MessageSendEvent::SendOpenChannel, nodes[1].node.get_our_node_id());
13237 let mut funding_tx = None;
13238 for idx in 0..super::MAX_UNFUNDED_CHANS_PER_PEER {
13239 nodes[1].node.handle_open_channel(&nodes[0].node.get_our_node_id(), &open_channel_msg);
13240 let accept_channel = get_event_msg!(nodes[1], MessageSendEvent::SendAcceptChannel, nodes[0].node.get_our_node_id());
13243 nodes[0].node.handle_accept_channel(&nodes[1].node.get_our_node_id(), &accept_channel);
13244 let (temporary_channel_id, tx, _) = create_funding_transaction(&nodes[0], &nodes[1].node.get_our_node_id(), 100_000, 42);
13245 funding_tx = Some(tx.clone());
13246 nodes[0].node.funding_transaction_generated(&temporary_channel_id, &nodes[1].node.get_our_node_id(), tx).unwrap();
13247 let funding_created_msg = get_event_msg!(nodes[0], MessageSendEvent::SendFundingCreated, nodes[1].node.get_our_node_id());
13249 nodes[1].node.handle_funding_created(&nodes[0].node.get_our_node_id(), &funding_created_msg);
13250 check_added_monitors!(nodes[1], 1);
13251 expect_channel_pending_event(&nodes[1], &nodes[0].node.get_our_node_id());
13253 let funding_signed = get_event_msg!(nodes[1], MessageSendEvent::SendFundingSigned, nodes[0].node.get_our_node_id());
13255 nodes[0].node.handle_funding_signed(&nodes[1].node.get_our_node_id(), &funding_signed);
13256 check_added_monitors!(nodes[0], 1);
13257 expect_channel_pending_event(&nodes[0], &nodes[1].node.get_our_node_id());
13259 open_channel_msg.common_fields.temporary_channel_id = ChannelId::temporary_from_entropy_source(&nodes[0].keys_manager);
13262 // A MAX_UNFUNDED_CHANS_PER_PEER + 1 channel will be summarily rejected
13263 open_channel_msg.common_fields.temporary_channel_id = ChannelId::temporary_from_entropy_source(
13264 &nodes[0].keys_manager);
13265 nodes[1].node.handle_open_channel(&nodes[0].node.get_our_node_id(), &open_channel_msg);
13266 assert_eq!(get_err_msg(&nodes[1], &nodes[0].node.get_our_node_id()).channel_id,
13267 open_channel_msg.common_fields.temporary_channel_id);
13269 // Further, because all of our channels with nodes[0] are inbound, and none of them funded,
13270 // it doesn't count as a "protected" peer, i.e. it counts towards the MAX_NO_CHANNEL_PEERS
13272 let mut peer_pks = Vec::with_capacity(super::MAX_NO_CHANNEL_PEERS);
13273 for _ in 1..super::MAX_NO_CHANNEL_PEERS {
13274 let random_pk = PublicKey::from_secret_key(&nodes[0].node.secp_ctx,
13275 &SecretKey::from_slice(&nodes[1].keys_manager.get_secure_random_bytes()).unwrap());
13276 peer_pks.push(random_pk);
13277 nodes[1].node.peer_connected(&random_pk, &msgs::Init {
13278 features: nodes[0].node.init_features(), networks: None, remote_network_address: None
13281 let last_random_pk = PublicKey::from_secret_key(&nodes[0].node.secp_ctx,
13282 &SecretKey::from_slice(&nodes[1].keys_manager.get_secure_random_bytes()).unwrap());
13283 nodes[1].node.peer_connected(&last_random_pk, &msgs::Init {
13284 features: nodes[0].node.init_features(), networks: None, remote_network_address: None
13285 }, true).unwrap_err();
13287 // Also importantly, because nodes[0] isn't "protected", we will refuse a reconnection from
13288 // them if we have too many un-channel'd peers.
13289 nodes[1].node.peer_disconnected(&nodes[0].node.get_our_node_id());
13290 let chan_closed_events = nodes[1].node.get_and_clear_pending_events();
13291 assert_eq!(chan_closed_events.len(), super::MAX_UNFUNDED_CHANS_PER_PEER - 1);
13292 for ev in chan_closed_events {
13293 if let Event::ChannelClosed { .. } = ev { } else { panic!(); }
13295 nodes[1].node.peer_connected(&last_random_pk, &msgs::Init {
13296 features: nodes[0].node.init_features(), networks: None, remote_network_address: None
13298 nodes[1].node.peer_connected(&nodes[0].node.get_our_node_id(), &msgs::Init {
13299 features: nodes[0].node.init_features(), networks: None, remote_network_address: None
13300 }, true).unwrap_err();
13302 // but of course if the connection is outbound its allowed...
13303 nodes[1].node.peer_connected(&nodes[0].node.get_our_node_id(), &msgs::Init {
13304 features: nodes[0].node.init_features(), networks: None, remote_network_address: None
13305 }, false).unwrap();
13306 nodes[1].node.peer_disconnected(&nodes[0].node.get_our_node_id());
13308 // Now nodes[0] is disconnected but still has a pending, un-funded channel lying around.
13309 // Even though we accept one more connection from new peers, we won't actually let them
13311 assert!(peer_pks.len() > super::MAX_UNFUNDED_CHANNEL_PEERS - 1);
13312 for i in 0..super::MAX_UNFUNDED_CHANNEL_PEERS - 1 {
13313 nodes[1].node.handle_open_channel(&peer_pks[i], &open_channel_msg);
13314 get_event_msg!(nodes[1], MessageSendEvent::SendAcceptChannel, peer_pks[i]);
13315 open_channel_msg.common_fields.temporary_channel_id = ChannelId::temporary_from_entropy_source(&nodes[0].keys_manager);
13317 nodes[1].node.handle_open_channel(&last_random_pk, &open_channel_msg);
13318 assert_eq!(get_err_msg(&nodes[1], &last_random_pk).channel_id,
13319 open_channel_msg.common_fields.temporary_channel_id);
13321 // Of course, however, outbound channels are always allowed
13322 nodes[1].node.create_channel(last_random_pk, 100_000, 0, 42, None, None).unwrap();
13323 get_event_msg!(nodes[1], MessageSendEvent::SendOpenChannel, last_random_pk);
13325 // If we fund the first channel, nodes[0] has a live on-chain channel with us, it is now
13326 // "protected" and can connect again.
13327 mine_transaction(&nodes[1], funding_tx.as_ref().unwrap());
13328 nodes[1].node.peer_connected(&nodes[0].node.get_our_node_id(), &msgs::Init {
13329 features: nodes[0].node.init_features(), networks: None, remote_network_address: None
13331 get_event_msg!(nodes[1], MessageSendEvent::SendChannelReestablish, nodes[0].node.get_our_node_id());
13333 // Further, because the first channel was funded, we can open another channel with
13335 nodes[1].node.handle_open_channel(&last_random_pk, &open_channel_msg);
13336 get_event_msg!(nodes[1], MessageSendEvent::SendAcceptChannel, last_random_pk);
13340 fn test_outbound_chans_unlimited() {
13341 // Test that we never refuse an outbound channel even if a peer is unfuned-channel-limited
13342 let chanmon_cfgs = create_chanmon_cfgs(2);
13343 let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
13344 let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
13345 let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
13347 // Note that create_network connects the nodes together for us
13349 nodes[0].node.create_channel(nodes[1].node.get_our_node_id(), 100_000, 0, 42, None, None).unwrap();
13350 let mut open_channel_msg = get_event_msg!(nodes[0], MessageSendEvent::SendOpenChannel, nodes[1].node.get_our_node_id());
13352 for _ in 0..super::MAX_UNFUNDED_CHANS_PER_PEER {
13353 nodes[1].node.handle_open_channel(&nodes[0].node.get_our_node_id(), &open_channel_msg);
13354 get_event_msg!(nodes[1], MessageSendEvent::SendAcceptChannel, nodes[0].node.get_our_node_id());
13355 open_channel_msg.common_fields.temporary_channel_id = ChannelId::temporary_from_entropy_source(&nodes[0].keys_manager);
13358 // Once we have MAX_UNFUNDED_CHANS_PER_PEER unfunded channels, new inbound channels will be
13360 nodes[1].node.handle_open_channel(&nodes[0].node.get_our_node_id(), &open_channel_msg);
13361 assert_eq!(get_err_msg(&nodes[1], &nodes[0].node.get_our_node_id()).channel_id,
13362 open_channel_msg.common_fields.temporary_channel_id);
13364 // but we can still open an outbound channel.
13365 nodes[1].node.create_channel(nodes[0].node.get_our_node_id(), 100_000, 0, 42, None, None).unwrap();
13366 get_event_msg!(nodes[1], MessageSendEvent::SendOpenChannel, nodes[0].node.get_our_node_id());
13368 // but even with such an outbound channel, additional inbound channels will still fail.
13369 nodes[1].node.handle_open_channel(&nodes[0].node.get_our_node_id(), &open_channel_msg);
13370 assert_eq!(get_err_msg(&nodes[1], &nodes[0].node.get_our_node_id()).channel_id,
13371 open_channel_msg.common_fields.temporary_channel_id);
13375 fn test_0conf_limiting() {
13376 // Tests that we properly limit inbound channels when we have the manual-channel-acceptance
13377 // flag set and (sometimes) accept channels as 0conf.
13378 let chanmon_cfgs = create_chanmon_cfgs(2);
13379 let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
13380 let mut settings = test_default_channel_config();
13381 settings.manually_accept_inbound_channels = true;
13382 let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, Some(settings)]);
13383 let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
13385 // Note that create_network connects the nodes together for us
13387 nodes[0].node.create_channel(nodes[1].node.get_our_node_id(), 100_000, 0, 42, None, None).unwrap();
13388 let mut open_channel_msg = get_event_msg!(nodes[0], MessageSendEvent::SendOpenChannel, nodes[1].node.get_our_node_id());
13390 // First, get us up to MAX_UNFUNDED_CHANNEL_PEERS so we can test at the edge
13391 for _ in 0..super::MAX_UNFUNDED_CHANNEL_PEERS - 1 {
13392 let random_pk = PublicKey::from_secret_key(&nodes[0].node.secp_ctx,
13393 &SecretKey::from_slice(&nodes[1].keys_manager.get_secure_random_bytes()).unwrap());
13394 nodes[1].node.peer_connected(&random_pk, &msgs::Init {
13395 features: nodes[0].node.init_features(), networks: None, remote_network_address: None
13398 nodes[1].node.handle_open_channel(&random_pk, &open_channel_msg);
13399 let events = nodes[1].node.get_and_clear_pending_events();
13401 Event::OpenChannelRequest { temporary_channel_id, .. } => {
13402 nodes[1].node.accept_inbound_channel(&temporary_channel_id, &random_pk, 23).unwrap();
13404 _ => panic!("Unexpected event"),
13406 get_event_msg!(nodes[1], MessageSendEvent::SendAcceptChannel, random_pk);
13407 open_channel_msg.common_fields.temporary_channel_id = ChannelId::temporary_from_entropy_source(&nodes[0].keys_manager);
13410 // If we try to accept a channel from another peer non-0conf it will fail.
13411 let last_random_pk = PublicKey::from_secret_key(&nodes[0].node.secp_ctx,
13412 &SecretKey::from_slice(&nodes[1].keys_manager.get_secure_random_bytes()).unwrap());
13413 nodes[1].node.peer_connected(&last_random_pk, &msgs::Init {
13414 features: nodes[0].node.init_features(), networks: None, remote_network_address: None
13416 nodes[1].node.handle_open_channel(&last_random_pk, &open_channel_msg);
13417 let events = nodes[1].node.get_and_clear_pending_events();
13419 Event::OpenChannelRequest { temporary_channel_id, .. } => {
13420 match nodes[1].node.accept_inbound_channel(&temporary_channel_id, &last_random_pk, 23) {
13421 Err(APIError::APIMisuseError { err }) =>
13422 assert_eq!(err, "Too many peers with unfunded channels, refusing to accept new ones"),
13426 _ => panic!("Unexpected event"),
13428 assert_eq!(get_err_msg(&nodes[1], &last_random_pk).channel_id,
13429 open_channel_msg.common_fields.temporary_channel_id);
13431 // ...however if we accept the same channel 0conf it should work just fine.
13432 nodes[1].node.handle_open_channel(&last_random_pk, &open_channel_msg);
13433 let events = nodes[1].node.get_and_clear_pending_events();
13435 Event::OpenChannelRequest { temporary_channel_id, .. } => {
13436 nodes[1].node.accept_inbound_channel_from_trusted_peer_0conf(&temporary_channel_id, &last_random_pk, 23).unwrap();
13438 _ => panic!("Unexpected event"),
13440 get_event_msg!(nodes[1], MessageSendEvent::SendAcceptChannel, last_random_pk);
13444 fn reject_excessively_underpaying_htlcs() {
13445 let chanmon_cfg = create_chanmon_cfgs(1);
13446 let node_cfg = create_node_cfgs(1, &chanmon_cfg);
13447 let node_chanmgr = create_node_chanmgrs(1, &node_cfg, &[None]);
13448 let node = create_network(1, &node_cfg, &node_chanmgr);
13449 let sender_intended_amt_msat = 100;
13450 let extra_fee_msat = 10;
13451 let hop_data = msgs::InboundOnionPayload::Receive {
13452 sender_intended_htlc_amt_msat: 100,
13453 cltv_expiry_height: 42,
13454 payment_metadata: None,
13455 keysend_preimage: None,
13456 payment_data: Some(msgs::FinalOnionHopData {
13457 payment_secret: PaymentSecret([0; 32]), total_msat: sender_intended_amt_msat,
13459 custom_tlvs: Vec::new(),
13461 // Check that if the amount we received + the penultimate hop extra fee is less than the sender
13462 // intended amount, we fail the payment.
13463 let current_height: u32 = node[0].node.best_block.read().unwrap().height;
13464 if let Err(crate::ln::channelmanager::InboundHTLCErr { err_code, .. }) =
13465 create_recv_pending_htlc_info(hop_data, [0; 32], PaymentHash([0; 32]),
13466 sender_intended_amt_msat - extra_fee_msat - 1, 42, None, true, Some(extra_fee_msat),
13467 current_height, node[0].node.default_configuration.accept_mpp_keysend)
13469 assert_eq!(err_code, 19);
13470 } else { panic!(); }
13472 // If amt_received + extra_fee is equal to the sender intended amount, we're fine.
13473 let hop_data = msgs::InboundOnionPayload::Receive { // This is the same payload as above, InboundOnionPayload doesn't implement Clone
13474 sender_intended_htlc_amt_msat: 100,
13475 cltv_expiry_height: 42,
13476 payment_metadata: None,
13477 keysend_preimage: None,
13478 payment_data: Some(msgs::FinalOnionHopData {
13479 payment_secret: PaymentSecret([0; 32]), total_msat: sender_intended_amt_msat,
13481 custom_tlvs: Vec::new(),
13483 let current_height: u32 = node[0].node.best_block.read().unwrap().height;
13484 assert!(create_recv_pending_htlc_info(hop_data, [0; 32], PaymentHash([0; 32]),
13485 sender_intended_amt_msat - extra_fee_msat, 42, None, true, Some(extra_fee_msat),
13486 current_height, node[0].node.default_configuration.accept_mpp_keysend).is_ok());
13490 fn test_final_incorrect_cltv(){
13491 let chanmon_cfg = create_chanmon_cfgs(1);
13492 let node_cfg = create_node_cfgs(1, &chanmon_cfg);
13493 let node_chanmgr = create_node_chanmgrs(1, &node_cfg, &[None]);
13494 let node = create_network(1, &node_cfg, &node_chanmgr);
13496 let current_height: u32 = node[0].node.best_block.read().unwrap().height;
13497 let result = create_recv_pending_htlc_info(msgs::InboundOnionPayload::Receive {
13498 sender_intended_htlc_amt_msat: 100,
13499 cltv_expiry_height: 22,
13500 payment_metadata: None,
13501 keysend_preimage: None,
13502 payment_data: Some(msgs::FinalOnionHopData {
13503 payment_secret: PaymentSecret([0; 32]), total_msat: 100,
13505 custom_tlvs: Vec::new(),
13506 }, [0; 32], PaymentHash([0; 32]), 100, 23, None, true, None, current_height,
13507 node[0].node.default_configuration.accept_mpp_keysend);
13509 // Should not return an error as this condition:
13510 // https://github.com/lightning/bolts/blob/4dcc377209509b13cf89a4b91fde7d478f5b46d8/04-onion-routing.md?plain=1#L334
13511 // is not satisfied.
13512 assert!(result.is_ok());
13516 fn test_inbound_anchors_manual_acceptance() {
13517 // Tests that we properly limit inbound channels when we have the manual-channel-acceptance
13518 // flag set and (sometimes) accept channels as 0conf.
13519 let mut anchors_cfg = test_default_channel_config();
13520 anchors_cfg.channel_handshake_config.negotiate_anchors_zero_fee_htlc_tx = true;
13522 let mut anchors_manual_accept_cfg = anchors_cfg.clone();
13523 anchors_manual_accept_cfg.manually_accept_inbound_channels = true;
13525 let chanmon_cfgs = create_chanmon_cfgs(3);
13526 let node_cfgs = create_node_cfgs(3, &chanmon_cfgs);
13527 let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs,
13528 &[Some(anchors_cfg.clone()), Some(anchors_cfg.clone()), Some(anchors_manual_accept_cfg.clone())]);
13529 let nodes = create_network(3, &node_cfgs, &node_chanmgrs);
13531 nodes[0].node.create_channel(nodes[1].node.get_our_node_id(), 100_000, 0, 42, None, None).unwrap();
13532 let open_channel_msg = get_event_msg!(nodes[0], MessageSendEvent::SendOpenChannel, nodes[1].node.get_our_node_id());
13534 nodes[1].node.handle_open_channel(&nodes[0].node.get_our_node_id(), &open_channel_msg);
13535 assert!(nodes[1].node.get_and_clear_pending_events().is_empty());
13536 let msg_events = nodes[1].node.get_and_clear_pending_msg_events();
13537 match &msg_events[0] {
13538 MessageSendEvent::HandleError { node_id, action } => {
13539 assert_eq!(*node_id, nodes[0].node.get_our_node_id());
13541 ErrorAction::SendErrorMessage { msg } =>
13542 assert_eq!(msg.data, "No channels with anchor outputs accepted".to_owned()),
13543 _ => panic!("Unexpected error action"),
13546 _ => panic!("Unexpected event"),
13549 nodes[2].node.handle_open_channel(&nodes[0].node.get_our_node_id(), &open_channel_msg);
13550 let events = nodes[2].node.get_and_clear_pending_events();
13552 Event::OpenChannelRequest { temporary_channel_id, .. } =>
13553 nodes[2].node.accept_inbound_channel(&temporary_channel_id, &nodes[0].node.get_our_node_id(), 23).unwrap(),
13554 _ => panic!("Unexpected event"),
13556 get_event_msg!(nodes[2], MessageSendEvent::SendAcceptChannel, nodes[0].node.get_our_node_id());
13560 fn test_anchors_zero_fee_htlc_tx_fallback() {
13561 // Tests that if both nodes support anchors, but the remote node does not want to accept
13562 // anchor channels at the moment, an error it sent to the local node such that it can retry
13563 // the channel without the anchors feature.
13564 let chanmon_cfgs = create_chanmon_cfgs(2);
13565 let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
13566 let mut anchors_config = test_default_channel_config();
13567 anchors_config.channel_handshake_config.negotiate_anchors_zero_fee_htlc_tx = true;
13568 anchors_config.manually_accept_inbound_channels = true;
13569 let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[Some(anchors_config.clone()), Some(anchors_config.clone())]);
13570 let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
13572 nodes[0].node.create_channel(nodes[1].node.get_our_node_id(), 100_000, 0, 0, None, None).unwrap();
13573 let open_channel_msg = get_event_msg!(nodes[0], MessageSendEvent::SendOpenChannel, nodes[1].node.get_our_node_id());
13574 assert!(open_channel_msg.common_fields.channel_type.as_ref().unwrap().supports_anchors_zero_fee_htlc_tx());
13576 nodes[1].node.handle_open_channel(&nodes[0].node.get_our_node_id(), &open_channel_msg);
13577 let events = nodes[1].node.get_and_clear_pending_events();
13579 Event::OpenChannelRequest { temporary_channel_id, .. } => {
13580 nodes[1].node.force_close_broadcasting_latest_txn(&temporary_channel_id, &nodes[0].node.get_our_node_id()).unwrap();
13582 _ => panic!("Unexpected event"),
13585 let error_msg = get_err_msg(&nodes[1], &nodes[0].node.get_our_node_id());
13586 nodes[0].node.handle_error(&nodes[1].node.get_our_node_id(), &error_msg);
13588 let open_channel_msg = get_event_msg!(nodes[0], MessageSendEvent::SendOpenChannel, nodes[1].node.get_our_node_id());
13589 assert!(!open_channel_msg.common_fields.channel_type.unwrap().supports_anchors_zero_fee_htlc_tx());
13591 // Since nodes[1] should not have accepted the channel, it should
13592 // not have generated any events.
13593 assert!(nodes[1].node.get_and_clear_pending_events().is_empty());
13597 fn test_update_channel_config() {
13598 let chanmon_cfg = create_chanmon_cfgs(2);
13599 let node_cfg = create_node_cfgs(2, &chanmon_cfg);
13600 let mut user_config = test_default_channel_config();
13601 let node_chanmgr = create_node_chanmgrs(2, &node_cfg, &[Some(user_config), Some(user_config)]);
13602 let nodes = create_network(2, &node_cfg, &node_chanmgr);
13603 let _ = create_announced_chan_between_nodes(&nodes, 0, 1);
13604 let channel = &nodes[0].node.list_channels()[0];
13606 nodes[0].node.update_channel_config(&channel.counterparty.node_id, &[channel.channel_id], &user_config.channel_config).unwrap();
13607 let events = nodes[0].node.get_and_clear_pending_msg_events();
13608 assert_eq!(events.len(), 0);
13610 user_config.channel_config.forwarding_fee_base_msat += 10;
13611 nodes[0].node.update_channel_config(&channel.counterparty.node_id, &[channel.channel_id], &user_config.channel_config).unwrap();
13612 assert_eq!(nodes[0].node.list_channels()[0].config.unwrap().forwarding_fee_base_msat, user_config.channel_config.forwarding_fee_base_msat);
13613 let events = nodes[0].node.get_and_clear_pending_msg_events();
13614 assert_eq!(events.len(), 1);
13616 MessageSendEvent::BroadcastChannelUpdate { .. } => {},
13617 _ => panic!("expected BroadcastChannelUpdate event"),
13620 nodes[0].node.update_partial_channel_config(&channel.counterparty.node_id, &[channel.channel_id], &ChannelConfigUpdate::default()).unwrap();
13621 let events = nodes[0].node.get_and_clear_pending_msg_events();
13622 assert_eq!(events.len(), 0);
13624 let new_cltv_expiry_delta = user_config.channel_config.cltv_expiry_delta + 6;
13625 nodes[0].node.update_partial_channel_config(&channel.counterparty.node_id, &[channel.channel_id], &ChannelConfigUpdate {
13626 cltv_expiry_delta: Some(new_cltv_expiry_delta),
13627 ..Default::default()
13629 assert_eq!(nodes[0].node.list_channels()[0].config.unwrap().cltv_expiry_delta, new_cltv_expiry_delta);
13630 let events = nodes[0].node.get_and_clear_pending_msg_events();
13631 assert_eq!(events.len(), 1);
13633 MessageSendEvent::BroadcastChannelUpdate { .. } => {},
13634 _ => panic!("expected BroadcastChannelUpdate event"),
13637 let new_fee = user_config.channel_config.forwarding_fee_proportional_millionths + 100;
13638 nodes[0].node.update_partial_channel_config(&channel.counterparty.node_id, &[channel.channel_id], &ChannelConfigUpdate {
13639 forwarding_fee_proportional_millionths: Some(new_fee),
13640 ..Default::default()
13642 assert_eq!(nodes[0].node.list_channels()[0].config.unwrap().cltv_expiry_delta, new_cltv_expiry_delta);
13643 assert_eq!(nodes[0].node.list_channels()[0].config.unwrap().forwarding_fee_proportional_millionths, new_fee);
13644 let events = nodes[0].node.get_and_clear_pending_msg_events();
13645 assert_eq!(events.len(), 1);
13647 MessageSendEvent::BroadcastChannelUpdate { .. } => {},
13648 _ => panic!("expected BroadcastChannelUpdate event"),
13651 // If we provide a channel_id not associated with the peer, we should get an error and no updates
13652 // should be applied to ensure update atomicity as specified in the API docs.
13653 let bad_channel_id = ChannelId::v1_from_funding_txid(&[10; 32], 10);
13654 let current_fee = nodes[0].node.list_channels()[0].config.unwrap().forwarding_fee_proportional_millionths;
13655 let new_fee = current_fee + 100;
13658 nodes[0].node.update_partial_channel_config(&channel.counterparty.node_id, &[channel.channel_id, bad_channel_id], &ChannelConfigUpdate {
13659 forwarding_fee_proportional_millionths: Some(new_fee),
13660 ..Default::default()
13662 Err(APIError::ChannelUnavailable { err: _ }),
13665 // Check that the fee hasn't changed for the channel that exists.
13666 assert_eq!(nodes[0].node.list_channels()[0].config.unwrap().forwarding_fee_proportional_millionths, current_fee);
13667 let events = nodes[0].node.get_and_clear_pending_msg_events();
13668 assert_eq!(events.len(), 0);
13672 fn test_payment_display() {
13673 let payment_id = PaymentId([42; 32]);
13674 assert_eq!(format!("{}", &payment_id), "2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a");
13675 let payment_hash = PaymentHash([42; 32]);
13676 assert_eq!(format!("{}", &payment_hash), "2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a");
13677 let payment_preimage = PaymentPreimage([42; 32]);
13678 assert_eq!(format!("{}", &payment_preimage), "2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a");
13682 fn test_trigger_lnd_force_close() {
13683 let chanmon_cfg = create_chanmon_cfgs(2);
13684 let node_cfg = create_node_cfgs(2, &chanmon_cfg);
13685 let user_config = test_default_channel_config();
13686 let node_chanmgr = create_node_chanmgrs(2, &node_cfg, &[Some(user_config), Some(user_config)]);
13687 let nodes = create_network(2, &node_cfg, &node_chanmgr);
13689 // Open a channel, immediately disconnect each other, and broadcast Alice's latest state.
13690 let (_, _, chan_id, funding_tx) = create_announced_chan_between_nodes(&nodes, 0, 1);
13691 nodes[0].node.peer_disconnected(&nodes[1].node.get_our_node_id());
13692 nodes[1].node.peer_disconnected(&nodes[0].node.get_our_node_id());
13693 nodes[0].node.force_close_broadcasting_latest_txn(&chan_id, &nodes[1].node.get_our_node_id()).unwrap();
13694 check_closed_broadcast(&nodes[0], 1, true);
13695 check_added_monitors(&nodes[0], 1);
13696 check_closed_event!(nodes[0], 1, ClosureReason::HolderForceClosed, [nodes[1].node.get_our_node_id()], 100000);
13698 let txn = nodes[0].tx_broadcaster.txn_broadcast();
13699 assert_eq!(txn.len(), 1);
13700 check_spends!(txn[0], funding_tx);
13703 // Since they're disconnected, Bob won't receive Alice's `Error` message. Reconnect them
13704 // such that Bob sends a `ChannelReestablish` to Alice since the channel is still open from
13706 nodes[0].node.peer_connected(&nodes[1].node.get_our_node_id(), &msgs::Init {
13707 features: nodes[1].node.init_features(), networks: None, remote_network_address: None
13709 nodes[1].node.peer_connected(&nodes[0].node.get_our_node_id(), &msgs::Init {
13710 features: nodes[0].node.init_features(), networks: None, remote_network_address: None
13711 }, false).unwrap();
13712 assert!(nodes[0].node.get_and_clear_pending_msg_events().is_empty());
13713 let channel_reestablish = get_event_msg!(
13714 nodes[1], MessageSendEvent::SendChannelReestablish, nodes[0].node.get_our_node_id()
13716 nodes[0].node.handle_channel_reestablish(&nodes[1].node.get_our_node_id(), &channel_reestablish);
13718 // Alice should respond with an error since the channel isn't known, but a bogus
13719 // `ChannelReestablish` should be sent first, such that we actually trigger Bob to force
13720 // close even if it was an lnd node.
13721 let msg_events = nodes[0].node.get_and_clear_pending_msg_events();
13722 assert_eq!(msg_events.len(), 2);
13723 if let MessageSendEvent::SendChannelReestablish { node_id, msg } = &msg_events[0] {
13724 assert_eq!(*node_id, nodes[1].node.get_our_node_id());
13725 assert_eq!(msg.next_local_commitment_number, 0);
13726 assert_eq!(msg.next_remote_commitment_number, 0);
13727 nodes[1].node.handle_channel_reestablish(&nodes[0].node.get_our_node_id(), &msg);
13728 } else { panic!() };
13729 check_closed_broadcast(&nodes[1], 1, true);
13730 check_added_monitors(&nodes[1], 1);
13731 let expected_close_reason = ClosureReason::ProcessingError {
13732 err: "Peer sent an invalid channel_reestablish to force close in a non-standard way".to_string()
13734 check_closed_event!(nodes[1], 1, expected_close_reason, [nodes[0].node.get_our_node_id()], 100000);
13736 let txn = nodes[1].tx_broadcaster.txn_broadcast();
13737 assert_eq!(txn.len(), 1);
13738 check_spends!(txn[0], funding_tx);
13743 fn test_malformed_forward_htlcs_ser() {
13744 // Ensure that `HTLCForwardInfo::FailMalformedHTLC`s are (de)serialized properly.
13745 let chanmon_cfg = create_chanmon_cfgs(1);
13746 let node_cfg = create_node_cfgs(1, &chanmon_cfg);
13749 let chanmgrs = create_node_chanmgrs(1, &node_cfg, &[None]);
13750 let deserialized_chanmgr;
13751 let mut nodes = create_network(1, &node_cfg, &chanmgrs);
13753 let dummy_failed_htlc = |htlc_id| {
13754 HTLCForwardInfo::FailHTLC { htlc_id, err_packet: msgs::OnionErrorPacket { data: vec![42] }, }
13756 let dummy_malformed_htlc = |htlc_id| {
13757 HTLCForwardInfo::FailMalformedHTLC { htlc_id, failure_code: 0x4000, sha256_of_onion: [0; 32] }
13760 let dummy_htlcs_1: Vec<HTLCForwardInfo> = (1..10).map(|htlc_id| {
13761 if htlc_id % 2 == 0 {
13762 dummy_failed_htlc(htlc_id)
13764 dummy_malformed_htlc(htlc_id)
13768 let dummy_htlcs_2: Vec<HTLCForwardInfo> = (1..10).map(|htlc_id| {
13769 if htlc_id % 2 == 1 {
13770 dummy_failed_htlc(htlc_id)
13772 dummy_malformed_htlc(htlc_id)
13777 let (scid_1, scid_2) = (42, 43);
13778 let mut forward_htlcs = new_hash_map();
13779 forward_htlcs.insert(scid_1, dummy_htlcs_1.clone());
13780 forward_htlcs.insert(scid_2, dummy_htlcs_2.clone());
13782 let mut chanmgr_fwd_htlcs = nodes[0].node.forward_htlcs.lock().unwrap();
13783 *chanmgr_fwd_htlcs = forward_htlcs.clone();
13784 core::mem::drop(chanmgr_fwd_htlcs);
13786 reload_node!(nodes[0], nodes[0].node.encode(), &[], persister, chain_monitor, deserialized_chanmgr);
13788 let mut deserialized_fwd_htlcs = nodes[0].node.forward_htlcs.lock().unwrap();
13789 for scid in [scid_1, scid_2].iter() {
13790 let deserialized_htlcs = deserialized_fwd_htlcs.remove(scid).unwrap();
13791 assert_eq!(forward_htlcs.remove(scid).unwrap(), deserialized_htlcs);
13793 assert!(deserialized_fwd_htlcs.is_empty());
13794 core::mem::drop(deserialized_fwd_htlcs);
13796 expect_pending_htlcs_forwardable!(nodes[0]);
13802 use crate::chain::Listen;
13803 use crate::chain::chainmonitor::{ChainMonitor, Persist};
13804 use crate::sign::{KeysManager, InMemorySigner};
13805 use crate::events::{Event, MessageSendEvent, MessageSendEventsProvider};
13806 use crate::ln::channelmanager::{BestBlock, ChainParameters, ChannelManager, PaymentHash, PaymentPreimage, PaymentId, RecipientOnionFields, Retry};
13807 use crate::ln::functional_test_utils::*;
13808 use crate::ln::msgs::{ChannelMessageHandler, Init};
13809 use crate::routing::gossip::NetworkGraph;
13810 use crate::routing::router::{PaymentParameters, RouteParameters};
13811 use crate::util::test_utils;
13812 use crate::util::config::{UserConfig, MaxDustHTLCExposure};
13814 use bitcoin::blockdata::locktime::absolute::LockTime;
13815 use bitcoin::hashes::Hash;
13816 use bitcoin::hashes::sha256::Hash as Sha256;
13817 use bitcoin::{Transaction, TxOut};
13819 use crate::sync::{Arc, Mutex, RwLock};
13821 use criterion::Criterion;
13823 type Manager<'a, P> = ChannelManager<
13824 &'a ChainMonitor<InMemorySigner, &'a test_utils::TestChainSource,
13825 &'a test_utils::TestBroadcaster, &'a test_utils::TestFeeEstimator,
13826 &'a test_utils::TestLogger, &'a P>,
13827 &'a test_utils::TestBroadcaster, &'a KeysManager, &'a KeysManager, &'a KeysManager,
13828 &'a test_utils::TestFeeEstimator, &'a test_utils::TestRouter<'a>,
13829 &'a test_utils::TestLogger>;
13831 struct ANodeHolder<'node_cfg, 'chan_mon_cfg: 'node_cfg, P: Persist<InMemorySigner>> {
13832 node: &'node_cfg Manager<'chan_mon_cfg, P>,
13834 impl<'node_cfg, 'chan_mon_cfg: 'node_cfg, P: Persist<InMemorySigner>> NodeHolder for ANodeHolder<'node_cfg, 'chan_mon_cfg, P> {
13835 type CM = Manager<'chan_mon_cfg, P>;
13837 fn node(&self) -> &Manager<'chan_mon_cfg, P> { self.node }
13839 fn chain_monitor(&self) -> Option<&test_utils::TestChainMonitor> { None }
13842 pub fn bench_sends(bench: &mut Criterion) {
13843 bench_two_sends(bench, "bench_sends", test_utils::TestPersister::new(), test_utils::TestPersister::new());
13846 pub fn bench_two_sends<P: Persist<InMemorySigner>>(bench: &mut Criterion, bench_name: &str, persister_a: P, persister_b: P) {
13847 // Do a simple benchmark of sending a payment back and forth between two nodes.
13848 // Note that this is unrealistic as each payment send will require at least two fsync
13850 let network = bitcoin::Network::Testnet;
13851 let genesis_block = bitcoin::blockdata::constants::genesis_block(network);
13853 let tx_broadcaster = test_utils::TestBroadcaster::new(network);
13854 let fee_estimator = test_utils::TestFeeEstimator { sat_per_kw: Mutex::new(253) };
13855 let logger_a = test_utils::TestLogger::with_id("node a".to_owned());
13856 let scorer = RwLock::new(test_utils::TestScorer::new());
13857 let router = test_utils::TestRouter::new(Arc::new(NetworkGraph::new(network, &logger_a)), &logger_a, &scorer);
13859 let mut config: UserConfig = Default::default();
13860 config.channel_config.max_dust_htlc_exposure = MaxDustHTLCExposure::FeeRateMultiplier(5_000_000 / 253);
13861 config.channel_handshake_config.minimum_depth = 1;
13863 let chain_monitor_a = ChainMonitor::new(None, &tx_broadcaster, &logger_a, &fee_estimator, &persister_a);
13864 let seed_a = [1u8; 32];
13865 let keys_manager_a = KeysManager::new(&seed_a, 42, 42);
13866 let node_a = ChannelManager::new(&fee_estimator, &chain_monitor_a, &tx_broadcaster, &router, &logger_a, &keys_manager_a, &keys_manager_a, &keys_manager_a, config.clone(), ChainParameters {
13868 best_block: BestBlock::from_network(network),
13869 }, genesis_block.header.time);
13870 let node_a_holder = ANodeHolder { node: &node_a };
13872 let logger_b = test_utils::TestLogger::with_id("node a".to_owned());
13873 let chain_monitor_b = ChainMonitor::new(None, &tx_broadcaster, &logger_a, &fee_estimator, &persister_b);
13874 let seed_b = [2u8; 32];
13875 let keys_manager_b = KeysManager::new(&seed_b, 42, 42);
13876 let node_b = ChannelManager::new(&fee_estimator, &chain_monitor_b, &tx_broadcaster, &router, &logger_b, &keys_manager_b, &keys_manager_b, &keys_manager_b, config.clone(), ChainParameters {
13878 best_block: BestBlock::from_network(network),
13879 }, genesis_block.header.time);
13880 let node_b_holder = ANodeHolder { node: &node_b };
13882 node_a.peer_connected(&node_b.get_our_node_id(), &Init {
13883 features: node_b.init_features(), networks: None, remote_network_address: None
13885 node_b.peer_connected(&node_a.get_our_node_id(), &Init {
13886 features: node_a.init_features(), networks: None, remote_network_address: None
13887 }, false).unwrap();
13888 node_a.create_channel(node_b.get_our_node_id(), 8_000_000, 100_000_000, 42, None, None).unwrap();
13889 node_b.handle_open_channel(&node_a.get_our_node_id(), &get_event_msg!(node_a_holder, MessageSendEvent::SendOpenChannel, node_b.get_our_node_id()));
13890 node_a.handle_accept_channel(&node_b.get_our_node_id(), &get_event_msg!(node_b_holder, MessageSendEvent::SendAcceptChannel, node_a.get_our_node_id()));
13893 if let Event::FundingGenerationReady { temporary_channel_id, output_script, .. } = get_event!(node_a_holder, Event::FundingGenerationReady) {
13894 tx = Transaction { version: 2, lock_time: LockTime::ZERO, input: Vec::new(), output: vec![TxOut {
13895 value: 8_000_000, script_pubkey: output_script,
13897 node_a.funding_transaction_generated(&temporary_channel_id, &node_b.get_our_node_id(), tx.clone()).unwrap();
13898 } else { panic!(); }
13900 node_b.handle_funding_created(&node_a.get_our_node_id(), &get_event_msg!(node_a_holder, MessageSendEvent::SendFundingCreated, node_b.get_our_node_id()));
13901 let events_b = node_b.get_and_clear_pending_events();
13902 assert_eq!(events_b.len(), 1);
13903 match events_b[0] {
13904 Event::ChannelPending{ ref counterparty_node_id, .. } => {
13905 assert_eq!(*counterparty_node_id, node_a.get_our_node_id());
13907 _ => panic!("Unexpected event"),
13910 node_a.handle_funding_signed(&node_b.get_our_node_id(), &get_event_msg!(node_b_holder, MessageSendEvent::SendFundingSigned, node_a.get_our_node_id()));
13911 let events_a = node_a.get_and_clear_pending_events();
13912 assert_eq!(events_a.len(), 1);
13913 match events_a[0] {
13914 Event::ChannelPending{ ref counterparty_node_id, .. } => {
13915 assert_eq!(*counterparty_node_id, node_b.get_our_node_id());
13917 _ => panic!("Unexpected event"),
13920 assert_eq!(&tx_broadcaster.txn_broadcasted.lock().unwrap()[..], &[tx.clone()]);
13922 let block = create_dummy_block(BestBlock::from_network(network).block_hash, 42, vec![tx]);
13923 Listen::block_connected(&node_a, &block, 1);
13924 Listen::block_connected(&node_b, &block, 1);
13926 node_a.handle_channel_ready(&node_b.get_our_node_id(), &get_event_msg!(node_b_holder, MessageSendEvent::SendChannelReady, node_a.get_our_node_id()));
13927 let msg_events = node_a.get_and_clear_pending_msg_events();
13928 assert_eq!(msg_events.len(), 2);
13929 match msg_events[0] {
13930 MessageSendEvent::SendChannelReady { ref msg, .. } => {
13931 node_b.handle_channel_ready(&node_a.get_our_node_id(), msg);
13932 get_event_msg!(node_b_holder, MessageSendEvent::SendChannelUpdate, node_a.get_our_node_id());
13936 match msg_events[1] {
13937 MessageSendEvent::SendChannelUpdate { .. } => {},
13941 let events_a = node_a.get_and_clear_pending_events();
13942 assert_eq!(events_a.len(), 1);
13943 match events_a[0] {
13944 Event::ChannelReady{ ref counterparty_node_id, .. } => {
13945 assert_eq!(*counterparty_node_id, node_b.get_our_node_id());
13947 _ => panic!("Unexpected event"),
13950 let events_b = node_b.get_and_clear_pending_events();
13951 assert_eq!(events_b.len(), 1);
13952 match events_b[0] {
13953 Event::ChannelReady{ ref counterparty_node_id, .. } => {
13954 assert_eq!(*counterparty_node_id, node_a.get_our_node_id());
13956 _ => panic!("Unexpected event"),
13959 let mut payment_count: u64 = 0;
13960 macro_rules! send_payment {
13961 ($node_a: expr, $node_b: expr) => {
13962 let payment_params = PaymentParameters::from_node_id($node_b.get_our_node_id(), TEST_FINAL_CLTV)
13963 .with_bolt11_features($node_b.bolt11_invoice_features()).unwrap();
13964 let mut payment_preimage = PaymentPreimage([0; 32]);
13965 payment_preimage.0[0..8].copy_from_slice(&payment_count.to_le_bytes());
13966 payment_count += 1;
13967 let payment_hash = PaymentHash(Sha256::hash(&payment_preimage.0[..]).to_byte_array());
13968 let payment_secret = $node_b.create_inbound_payment_for_hash(payment_hash, None, 7200, None).unwrap();
13970 $node_a.send_payment(payment_hash, RecipientOnionFields::secret_only(payment_secret),
13971 PaymentId(payment_hash.0),
13972 RouteParameters::from_payment_params_and_value(payment_params, 10_000),
13973 Retry::Attempts(0)).unwrap();
13974 let payment_event = SendEvent::from_event($node_a.get_and_clear_pending_msg_events().pop().unwrap());
13975 $node_b.handle_update_add_htlc(&$node_a.get_our_node_id(), &payment_event.msgs[0]);
13976 $node_b.handle_commitment_signed(&$node_a.get_our_node_id(), &payment_event.commitment_msg);
13977 let (raa, cs) = get_revoke_commit_msgs(&ANodeHolder { node: &$node_b }, &$node_a.get_our_node_id());
13978 $node_a.handle_revoke_and_ack(&$node_b.get_our_node_id(), &raa);
13979 $node_a.handle_commitment_signed(&$node_b.get_our_node_id(), &cs);
13980 $node_b.handle_revoke_and_ack(&$node_a.get_our_node_id(), &get_event_msg!(ANodeHolder { node: &$node_a }, MessageSendEvent::SendRevokeAndACK, $node_b.get_our_node_id()));
13982 expect_pending_htlcs_forwardable!(ANodeHolder { node: &$node_b });
13983 expect_payment_claimable!(ANodeHolder { node: &$node_b }, payment_hash, payment_secret, 10_000);
13984 $node_b.claim_funds(payment_preimage);
13985 expect_payment_claimed!(ANodeHolder { node: &$node_b }, payment_hash, 10_000);
13987 match $node_b.get_and_clear_pending_msg_events().pop().unwrap() {
13988 MessageSendEvent::UpdateHTLCs { node_id, updates } => {
13989 assert_eq!(node_id, $node_a.get_our_node_id());
13990 $node_a.handle_update_fulfill_htlc(&$node_b.get_our_node_id(), &updates.update_fulfill_htlcs[0]);
13991 $node_a.handle_commitment_signed(&$node_b.get_our_node_id(), &updates.commitment_signed);
13993 _ => panic!("Failed to generate claim event"),
13996 let (raa, cs) = get_revoke_commit_msgs(&ANodeHolder { node: &$node_a }, &$node_b.get_our_node_id());
13997 $node_b.handle_revoke_and_ack(&$node_a.get_our_node_id(), &raa);
13998 $node_b.handle_commitment_signed(&$node_a.get_our_node_id(), &cs);
13999 $node_a.handle_revoke_and_ack(&$node_b.get_our_node_id(), &get_event_msg!(ANodeHolder { node: &$node_b }, MessageSendEvent::SendRevokeAndACK, $node_a.get_our_node_id()));
14001 expect_payment_sent!(ANodeHolder { node: &$node_a }, payment_preimage);
14005 bench.bench_function(bench_name, |b| b.iter(|| {
14006 send_payment!(node_a, node_b);
14007 send_payment!(node_b, node_a);