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 routing::router::get_route 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).
21 use bitcoin::blockdata::block::BlockHeader;
22 use bitcoin::blockdata::transaction::Transaction;
23 use bitcoin::blockdata::constants::genesis_block;
24 use bitcoin::network::constants::Network;
26 use bitcoin::hashes::{Hash, HashEngine};
27 use bitcoin::hashes::sha256::Hash as Sha256;
28 use bitcoin::hashes::sha256d::Hash as Sha256dHash;
29 use bitcoin::hash_types::{BlockHash, Txid};
31 use bitcoin::secp256k1::key::{SecretKey,PublicKey};
32 use bitcoin::secp256k1::Secp256k1;
33 use bitcoin::secp256k1::ecdh::SharedSecret;
34 use bitcoin::secp256k1;
37 use chain::{Confirm, ChannelMonitorUpdateErr, Watch, BestBlock};
38 use chain::chaininterface::{BroadcasterInterface, ConfirmationTarget, FeeEstimator};
39 use chain::channelmonitor::{ChannelMonitor, ChannelMonitorUpdate, ChannelMonitorUpdateStep, HTLC_FAIL_BACK_BUFFER, CLTV_CLAIM_BUFFER, LATENCY_GRACE_PERIOD_BLOCKS, ANTI_REORG_DELAY, MonitorEvent, CLOSED_CHANNEL_UPDATE_ID};
40 use chain::transaction::{OutPoint, TransactionData};
41 // Since this struct is returned in `list_channels` methods, expose it here in case users want to
42 // construct one themselves.
43 use ln::{inbound_payment, PaymentHash, PaymentPreimage, PaymentSecret};
44 use ln::channel::{Channel, ChannelError, ChannelUpdateStatus, UpdateFulfillCommitFetch};
45 use ln::features::{ChannelTypeFeatures, InitFeatures, NodeFeatures};
46 use routing::router::{PaymentParameters, Route, RouteHop, RoutePath, RouteParameters};
48 use ln::msgs::NetAddress;
50 use ln::msgs::{ChannelMessageHandler, DecodeError, LightningError, MAX_VALUE_MSAT, OptionalField};
51 use chain::keysinterface::{Sign, KeysInterface, KeysManager, InMemorySigner, Recipient};
52 use util::config::UserConfig;
53 use util::events::{EventHandler, EventsProvider, MessageSendEvent, MessageSendEventsProvider, ClosureReason};
54 use util::{byte_utils, events};
55 use util::scid_utils::fake_scid;
56 use util::ser::{BigSize, FixedLengthReader, Readable, ReadableArgs, MaybeReadable, Writeable, Writer, VecWriter};
57 use util::logger::{Level, Logger};
58 use util::errors::APIError;
63 use core::cell::RefCell;
65 use sync::{Arc, Condvar, Mutex, MutexGuard, RwLock, RwLockReadGuard};
66 use core::sync::atomic::{AtomicUsize, Ordering};
67 use core::time::Duration;
70 #[cfg(any(test, feature = "std"))]
71 use std::time::Instant;
72 use util::crypto::sign;
74 // We hold various information about HTLC relay in the HTLC objects in Channel itself:
76 // Upon receipt of an HTLC from a peer, we'll give it a PendingHTLCStatus indicating if it should
77 // forward the HTLC with information it will give back to us when it does so, or if it should Fail
78 // the HTLC with the relevant message for the Channel to handle giving to the remote peer.
80 // Once said HTLC is committed in the Channel, if the PendingHTLCStatus indicated Forward, the
81 // Channel will return the PendingHTLCInfo back to us, and we will create an HTLCForwardInfo
82 // with it to track where it came from (in case of onwards-forward error), waiting a random delay
83 // before we forward it.
85 // We will then use HTLCForwardInfo's PendingHTLCInfo to construct an outbound HTLC, with a
86 // relevant HTLCSource::PreviousHopData filled in to indicate where it came from (which we can use
87 // to either fail-backwards or fulfill the HTLC backwards along the relevant path).
88 // Alternatively, we can fill an outbound HTLC with a HTLCSource::OutboundRoute indicating this is
89 // our payment, which we can use to decode errors or inform the user that the payment was sent.
91 #[derive(Clone)] // See Channel::revoke_and_ack for why, tl;dr: Rust bug
92 pub(super) enum PendingHTLCRouting {
94 onion_packet: msgs::OnionPacket,
95 short_channel_id: u64, // This should be NonZero<u64> eventually when we bump MSRV
98 payment_data: msgs::FinalOnionHopData,
99 incoming_cltv_expiry: u32, // Used to track when we should expire pending HTLCs that go unclaimed
100 phantom_shared_secret: Option<[u8; 32]>,
103 payment_preimage: PaymentPreimage,
104 incoming_cltv_expiry: u32, // Used to track when we should expire pending HTLCs that go unclaimed
108 #[derive(Clone)] // See Channel::revoke_and_ack for why, tl;dr: Rust bug
109 pub(super) struct PendingHTLCInfo {
110 pub(super) routing: PendingHTLCRouting,
111 pub(super) incoming_shared_secret: [u8; 32],
112 payment_hash: PaymentHash,
113 pub(super) amt_to_forward: u64,
114 pub(super) outgoing_cltv_value: u32,
117 #[derive(Clone)] // See Channel::revoke_and_ack for why, tl;dr: Rust bug
118 pub(super) enum HTLCFailureMsg {
119 Relay(msgs::UpdateFailHTLC),
120 Malformed(msgs::UpdateFailMalformedHTLC),
123 /// Stores whether we can't forward an HTLC or relevant forwarding info
124 #[derive(Clone)] // See Channel::revoke_and_ack for why, tl;dr: Rust bug
125 pub(super) enum PendingHTLCStatus {
126 Forward(PendingHTLCInfo),
127 Fail(HTLCFailureMsg),
130 pub(super) enum HTLCForwardInfo {
132 forward_info: PendingHTLCInfo,
134 // These fields are produced in `forward_htlcs()` and consumed in
135 // `process_pending_htlc_forwards()` for constructing the
136 // `HTLCSource::PreviousHopData` for failed and forwarded
138 prev_short_channel_id: u64,
140 prev_funding_outpoint: OutPoint,
144 err_packet: msgs::OnionErrorPacket,
148 /// Tracks the inbound corresponding to an outbound HTLC
149 #[derive(Clone, Hash, PartialEq, Eq)]
150 pub(crate) struct HTLCPreviousHopData {
151 short_channel_id: u64,
153 incoming_packet_shared_secret: [u8; 32],
154 phantom_shared_secret: Option<[u8; 32]>,
156 // This field is consumed by `claim_funds_from_hop()` when updating a force-closed backwards
157 // channel with a preimage provided by the forward channel.
162 /// Contains a total_msat (which may differ from value if this is a Multi-Path Payment) and a
163 /// payment_secret which prevents path-probing attacks and can associate different HTLCs which
164 /// are part of the same payment.
165 Invoice(msgs::FinalOnionHopData),
166 /// Contains the payer-provided preimage.
167 Spontaneous(PaymentPreimage),
170 struct ClaimableHTLC {
171 prev_hop: HTLCPreviousHopData,
174 onion_payload: OnionPayload,
178 /// A payment identifier used to uniquely identify a payment to LDK.
179 /// (C-not exported) as we just use [u8; 32] directly
180 #[derive(Hash, Copy, Clone, PartialEq, Eq, Debug)]
181 pub struct PaymentId(pub [u8; 32]);
183 impl Writeable for PaymentId {
184 fn write<W: Writer>(&self, w: &mut W) -> Result<(), io::Error> {
189 impl Readable for PaymentId {
190 fn read<R: Read>(r: &mut R) -> Result<Self, DecodeError> {
191 let buf: [u8; 32] = Readable::read(r)?;
195 /// Tracks the inbound corresponding to an outbound HTLC
196 #[allow(clippy::derive_hash_xor_eq)] // Our Hash is faithful to the data, we just don't have SecretKey::hash
197 #[derive(Clone, PartialEq, Eq)]
198 pub(crate) enum HTLCSource {
199 PreviousHopData(HTLCPreviousHopData),
202 session_priv: SecretKey,
203 /// Technically we can recalculate this from the route, but we cache it here to avoid
204 /// doing a double-pass on route when we get a failure back
205 first_hop_htlc_msat: u64,
206 payment_id: PaymentId,
207 payment_secret: Option<PaymentSecret>,
208 payment_params: Option<PaymentParameters>,
211 #[allow(clippy::derive_hash_xor_eq)] // Our Hash is faithful to the data, we just don't have SecretKey::hash
212 impl core::hash::Hash for HTLCSource {
213 fn hash<H: core::hash::Hasher>(&self, hasher: &mut H) {
215 HTLCSource::PreviousHopData(prev_hop_data) => {
217 prev_hop_data.hash(hasher);
219 HTLCSource::OutboundRoute { path, session_priv, payment_id, payment_secret, first_hop_htlc_msat, payment_params } => {
222 session_priv[..].hash(hasher);
223 payment_id.hash(hasher);
224 payment_secret.hash(hasher);
225 first_hop_htlc_msat.hash(hasher);
226 payment_params.hash(hasher);
231 #[cfg(not(feature = "grind_signatures"))]
234 pub fn dummy() -> Self {
235 HTLCSource::OutboundRoute {
237 session_priv: SecretKey::from_slice(&[1; 32]).unwrap(),
238 first_hop_htlc_msat: 0,
239 payment_id: PaymentId([2; 32]),
240 payment_secret: None,
241 payment_params: None,
246 #[derive(Clone)] // See Channel::revoke_and_ack for why, tl;dr: Rust bug
247 pub(super) enum HTLCFailReason {
249 err: msgs::OnionErrorPacket,
257 struct ReceiveError {
263 /// Return value for claim_funds_from_hop
264 enum ClaimFundsFromHop {
266 MonitorUpdateFail(PublicKey, MsgHandleErrInternal, Option<u64>),
271 type ShutdownResult = (Option<(OutPoint, ChannelMonitorUpdate)>, Vec<(HTLCSource, PaymentHash)>);
273 /// Error type returned across the channel_state mutex boundary. When an Err is generated for a
274 /// Channel, we generally end up with a ChannelError::Close for which we have to close the channel
275 /// immediately (ie with no further calls on it made). Thus, this step happens inside a
276 /// channel_state lock. We then return the set of things that need to be done outside the lock in
277 /// this struct and call handle_error!() on it.
279 struct MsgHandleErrInternal {
280 err: msgs::LightningError,
281 chan_id: Option<([u8; 32], u64)>, // If Some a channel of ours has been closed
282 shutdown_finish: Option<(ShutdownResult, Option<msgs::ChannelUpdate>)>,
284 impl MsgHandleErrInternal {
286 fn send_err_msg_no_close(err: String, channel_id: [u8; 32]) -> Self {
288 err: LightningError {
290 action: msgs::ErrorAction::SendErrorMessage {
291 msg: msgs::ErrorMessage {
298 shutdown_finish: None,
302 fn ignore_no_close(err: String) -> Self {
304 err: LightningError {
306 action: msgs::ErrorAction::IgnoreError,
309 shutdown_finish: None,
313 fn from_no_close(err: msgs::LightningError) -> Self {
314 Self { err, chan_id: None, shutdown_finish: None }
317 fn from_finish_shutdown(err: String, channel_id: [u8; 32], user_channel_id: u64, shutdown_res: ShutdownResult, channel_update: Option<msgs::ChannelUpdate>) -> Self {
319 err: LightningError {
321 action: msgs::ErrorAction::SendErrorMessage {
322 msg: msgs::ErrorMessage {
328 chan_id: Some((channel_id, user_channel_id)),
329 shutdown_finish: Some((shutdown_res, channel_update)),
333 fn from_chan_no_close(err: ChannelError, channel_id: [u8; 32]) -> Self {
336 ChannelError::Warn(msg) => LightningError {
338 action: msgs::ErrorAction::SendWarningMessage {
339 msg: msgs::WarningMessage {
343 log_level: Level::Warn,
346 ChannelError::Ignore(msg) => LightningError {
348 action: msgs::ErrorAction::IgnoreError,
350 ChannelError::Close(msg) => LightningError {
352 action: msgs::ErrorAction::SendErrorMessage {
353 msg: msgs::ErrorMessage {
359 ChannelError::CloseDelayBroadcast(msg) => LightningError {
361 action: msgs::ErrorAction::SendErrorMessage {
362 msg: msgs::ErrorMessage {
370 shutdown_finish: None,
375 /// We hold back HTLCs we intend to relay for a random interval greater than this (see
376 /// Event::PendingHTLCsForwardable for the API guidelines indicating how long should be waited).
377 /// This provides some limited amount of privacy. Ideally this would range from somewhere like one
378 /// second to 30 seconds, but people expect lightning to be, you know, kinda fast, sadly.
379 const MIN_HTLC_RELAY_HOLDING_CELL_MILLIS: u64 = 100;
381 /// For events which result in both a RevokeAndACK and a CommitmentUpdate, by default they should
382 /// be sent in the order they appear in the return value, however sometimes the order needs to be
383 /// variable at runtime (eg Channel::channel_reestablish needs to re-send messages in the order
384 /// they were originally sent). In those cases, this enum is also returned.
385 #[derive(Clone, PartialEq)]
386 pub(super) enum RAACommitmentOrder {
387 /// Send the CommitmentUpdate messages first
389 /// Send the RevokeAndACK message first
393 // Note this is only exposed in cfg(test):
394 pub(super) struct ChannelHolder<Signer: Sign> {
395 pub(super) by_id: HashMap<[u8; 32], Channel<Signer>>,
396 /// SCIDs (and outbound SCID aliases) to the real channel id. Outbound SCID aliases are added
397 /// here once the channel is available for normal use, with SCIDs being added once the funding
398 /// transaction is confirmed at the channel's required confirmation depth.
399 pub(super) short_to_id: HashMap<u64, [u8; 32]>,
400 /// SCID/SCID Alias -> forward infos. Key of 0 means payments received.
402 /// Note that because we may have an SCID Alias as the key we can have two entries per channel,
403 /// though in practice we probably won't be receiving HTLCs for a channel both via the alias
404 /// and via the classic SCID.
406 /// Note that while this is held in the same mutex as the channels themselves, no consistency
407 /// guarantees are made about the existence of a channel with the short id here, nor the short
408 /// ids in the PendingHTLCInfo!
409 pub(super) forward_htlcs: HashMap<u64, Vec<HTLCForwardInfo>>,
410 /// Map from payment hash to any HTLCs which are to us and can be failed/claimed by the user.
411 /// Note that while this is held in the same mutex as the channels themselves, no consistency
412 /// guarantees are made about the channels given here actually existing anymore by the time you
414 claimable_htlcs: HashMap<PaymentHash, Vec<ClaimableHTLC>>,
415 /// Messages to send to peers - pushed to in the same lock that they are generated in (except
416 /// for broadcast messages, where ordering isn't as strict).
417 pub(super) pending_msg_events: Vec<MessageSendEvent>,
420 /// Events which we process internally but cannot be procsesed immediately at the generation site
421 /// for some reason. They are handled in timer_tick_occurred, so may be processed with
422 /// quite some time lag.
423 enum BackgroundEvent {
424 /// Handle a ChannelMonitorUpdate that closes a channel, broadcasting its current latest holder
425 /// commitment transaction.
426 ClosingMonitorUpdate((OutPoint, ChannelMonitorUpdate)),
429 /// State we hold per-peer. In the future we should put channels in here, but for now we only hold
430 /// the latest Init features we heard from the peer.
432 latest_features: InitFeatures,
435 /// Stores a PaymentSecret and any other data we may need to validate an inbound payment is
436 /// actually ours and not some duplicate HTLC sent to us by a node along the route.
438 /// For users who don't want to bother doing their own payment preimage storage, we also store that
441 /// Note that this struct will be removed entirely soon, in favor of storing no inbound payment data
442 /// and instead encoding it in the payment secret.
443 struct PendingInboundPayment {
444 /// The payment secret that the sender must use for us to accept this payment
445 payment_secret: PaymentSecret,
446 /// Time at which this HTLC expires - blocks with a header time above this value will result in
447 /// this payment being removed.
449 /// Arbitrary identifier the user specifies (or not)
450 user_payment_id: u64,
451 // Other required attributes of the payment, optionally enforced:
452 payment_preimage: Option<PaymentPreimage>,
453 min_value_msat: Option<u64>,
456 /// Stores the session_priv for each part of a payment that is still pending. For versions 0.0.102
457 /// and later, also stores information for retrying the payment.
458 pub(crate) enum PendingOutboundPayment {
460 session_privs: HashSet<[u8; 32]>,
463 session_privs: HashSet<[u8; 32]>,
464 payment_hash: PaymentHash,
465 payment_secret: Option<PaymentSecret>,
466 pending_amt_msat: u64,
467 /// Used to track the fee paid. Only present if the payment was serialized on 0.0.103+.
468 pending_fee_msat: Option<u64>,
469 /// The total payment amount across all paths, used to verify that a retry is not overpaying.
471 /// Our best known block height at the time this payment was initiated.
472 starting_block_height: u32,
474 /// When a pending payment is fulfilled, we continue tracking it until all pending HTLCs have
475 /// been resolved. This ensures we don't look up pending payments in ChannelMonitors on restart
476 /// and add a pending payment that was already fulfilled.
478 session_privs: HashSet<[u8; 32]>,
479 payment_hash: Option<PaymentHash>,
481 /// When a payer gives up trying to retry a payment, they inform us, letting us generate a
482 /// `PaymentFailed` event when all HTLCs have irrevocably failed. This avoids a number of race
483 /// conditions in MPP-aware payment retriers (1), where the possibility of multiple
484 /// `PaymentPathFailed` events with `all_paths_failed` can be pending at once, confusing a
485 /// downstream event handler as to when a payment has actually failed.
487 /// (1) https://github.com/lightningdevkit/rust-lightning/issues/1164
489 session_privs: HashSet<[u8; 32]>,
490 payment_hash: PaymentHash,
494 impl PendingOutboundPayment {
495 fn is_retryable(&self) -> bool {
497 PendingOutboundPayment::Retryable { .. } => true,
501 fn is_fulfilled(&self) -> bool {
503 PendingOutboundPayment::Fulfilled { .. } => true,
507 fn abandoned(&self) -> bool {
509 PendingOutboundPayment::Abandoned { .. } => true,
513 fn get_pending_fee_msat(&self) -> Option<u64> {
515 PendingOutboundPayment::Retryable { pending_fee_msat, .. } => pending_fee_msat.clone(),
520 fn payment_hash(&self) -> Option<PaymentHash> {
522 PendingOutboundPayment::Legacy { .. } => None,
523 PendingOutboundPayment::Retryable { payment_hash, .. } => Some(*payment_hash),
524 PendingOutboundPayment::Fulfilled { payment_hash, .. } => *payment_hash,
525 PendingOutboundPayment::Abandoned { payment_hash, .. } => Some(*payment_hash),
529 fn mark_fulfilled(&mut self) {
530 let mut session_privs = HashSet::new();
531 core::mem::swap(&mut session_privs, match self {
532 PendingOutboundPayment::Legacy { session_privs } |
533 PendingOutboundPayment::Retryable { session_privs, .. } |
534 PendingOutboundPayment::Fulfilled { session_privs, .. } |
535 PendingOutboundPayment::Abandoned { session_privs, .. }
538 let payment_hash = self.payment_hash();
539 *self = PendingOutboundPayment::Fulfilled { session_privs, payment_hash };
542 fn mark_abandoned(&mut self) -> Result<(), ()> {
543 let mut session_privs = HashSet::new();
544 let our_payment_hash;
545 core::mem::swap(&mut session_privs, match self {
546 PendingOutboundPayment::Legacy { .. } |
547 PendingOutboundPayment::Fulfilled { .. } =>
549 PendingOutboundPayment::Retryable { session_privs, payment_hash, .. } |
550 PendingOutboundPayment::Abandoned { session_privs, payment_hash, .. } => {
551 our_payment_hash = *payment_hash;
555 *self = PendingOutboundPayment::Abandoned { session_privs, payment_hash: our_payment_hash };
559 /// panics if path is None and !self.is_fulfilled
560 fn remove(&mut self, session_priv: &[u8; 32], path: Option<&Vec<RouteHop>>) -> bool {
561 let remove_res = match self {
562 PendingOutboundPayment::Legacy { session_privs } |
563 PendingOutboundPayment::Retryable { session_privs, .. } |
564 PendingOutboundPayment::Fulfilled { session_privs, .. } |
565 PendingOutboundPayment::Abandoned { session_privs, .. } => {
566 session_privs.remove(session_priv)
570 if let PendingOutboundPayment::Retryable { ref mut pending_amt_msat, ref mut pending_fee_msat, .. } = self {
571 let path = path.expect("Fulfilling a payment should always come with a path");
572 let path_last_hop = path.last().expect("Outbound payments must have had a valid path");
573 *pending_amt_msat -= path_last_hop.fee_msat;
574 if let Some(fee_msat) = pending_fee_msat.as_mut() {
575 *fee_msat -= path.get_path_fees();
582 fn insert(&mut self, session_priv: [u8; 32], path: &Vec<RouteHop>) -> bool {
583 let insert_res = match self {
584 PendingOutboundPayment::Legacy { session_privs } |
585 PendingOutboundPayment::Retryable { session_privs, .. } => {
586 session_privs.insert(session_priv)
588 PendingOutboundPayment::Fulfilled { .. } => false,
589 PendingOutboundPayment::Abandoned { .. } => false,
592 if let PendingOutboundPayment::Retryable { ref mut pending_amt_msat, ref mut pending_fee_msat, .. } = self {
593 let path_last_hop = path.last().expect("Outbound payments must have had a valid path");
594 *pending_amt_msat += path_last_hop.fee_msat;
595 if let Some(fee_msat) = pending_fee_msat.as_mut() {
596 *fee_msat += path.get_path_fees();
603 fn remaining_parts(&self) -> usize {
605 PendingOutboundPayment::Legacy { session_privs } |
606 PendingOutboundPayment::Retryable { session_privs, .. } |
607 PendingOutboundPayment::Fulfilled { session_privs, .. } |
608 PendingOutboundPayment::Abandoned { session_privs, .. } => {
615 /// SimpleArcChannelManager is useful when you need a ChannelManager with a static lifetime, e.g.
616 /// when you're using lightning-net-tokio (since tokio::spawn requires parameters with static
617 /// lifetimes). Other times you can afford a reference, which is more efficient, in which case
618 /// SimpleRefChannelManager is the more appropriate type. Defining these type aliases prevents
619 /// issues such as overly long function definitions. Note that the ChannelManager can take any
620 /// type that implements KeysInterface for its keys manager, but this type alias chooses the
621 /// concrete type of the KeysManager.
623 /// (C-not exported) as Arcs don't make sense in bindings
624 pub type SimpleArcChannelManager<M, T, F, L> = ChannelManager<InMemorySigner, Arc<M>, Arc<T>, Arc<KeysManager>, Arc<F>, Arc<L>>;
626 /// SimpleRefChannelManager is a type alias for a ChannelManager reference, and is the reference
627 /// counterpart to the SimpleArcChannelManager type alias. Use this type by default when you don't
628 /// need a ChannelManager with a static lifetime. You'll need a static lifetime in cases such as
629 /// usage of lightning-net-tokio (since tokio::spawn requires parameters with static lifetimes).
630 /// But if this is not necessary, using a reference is more efficient. Defining these type aliases
631 /// helps with issues such as long function definitions. Note that the ChannelManager can take any
632 /// type that implements KeysInterface for its keys manager, but this type alias chooses the
633 /// concrete type of the KeysManager.
635 /// (C-not exported) as Arcs don't make sense in bindings
636 pub type SimpleRefChannelManager<'a, 'b, 'c, 'd, 'e, M, T, F, L> = ChannelManager<InMemorySigner, &'a M, &'b T, &'c KeysManager, &'d F, &'e L>;
638 /// Manager which keeps track of a number of channels and sends messages to the appropriate
639 /// channel, also tracking HTLC preimages and forwarding onion packets appropriately.
641 /// Implements ChannelMessageHandler, handling the multi-channel parts and passing things through
642 /// to individual Channels.
644 /// Implements Writeable to write out all channel state to disk. Implies peer_disconnected() for
645 /// all peers during write/read (though does not modify this instance, only the instance being
646 /// serialized). This will result in any channels which have not yet exchanged funding_created (ie
647 /// called funding_transaction_generated for outbound channels).
649 /// Note that you can be a bit lazier about writing out ChannelManager than you can be with
650 /// ChannelMonitors. With ChannelMonitors you MUST write each monitor update out to disk before
651 /// returning from chain::Watch::watch_/update_channel, with ChannelManagers, writing updates
652 /// happens out-of-band (and will prevent any other ChannelManager operations from occurring during
653 /// the serialization process). If the deserialized version is out-of-date compared to the
654 /// ChannelMonitors passed by reference to read(), those channels will be force-closed based on the
655 /// ChannelMonitor state and no funds will be lost (mod on-chain transaction fees).
657 /// Note that the deserializer is only implemented for (BlockHash, ChannelManager), which
658 /// tells you the last block hash which was block_connect()ed. You MUST rescan any blocks along
659 /// the "reorg path" (ie call block_disconnected() until you get to a common block and then call
660 /// block_connected() to step towards your best block) upon deserialization before using the
663 /// Note that ChannelManager is responsible for tracking liveness of its channels and generating
664 /// ChannelUpdate messages informing peers that the channel is temporarily disabled. To avoid
665 /// spam due to quick disconnection/reconnection, updates are not sent until the channel has been
666 /// offline for a full minute. In order to track this, you must call
667 /// timer_tick_occurred roughly once per minute, though it doesn't have to be perfect.
669 /// Rather than using a plain ChannelManager, it is preferable to use either a SimpleArcChannelManager
670 /// a SimpleRefChannelManager, for conciseness. See their documentation for more details, but
671 /// essentially you should default to using a SimpleRefChannelManager, and use a
672 /// SimpleArcChannelManager when you require a ChannelManager with a static lifetime, such as when
673 /// you're using lightning-net-tokio.
674 pub struct ChannelManager<Signer: Sign, M: Deref, T: Deref, K: Deref, F: Deref, L: Deref>
675 where M::Target: chain::Watch<Signer>,
676 T::Target: BroadcasterInterface,
677 K::Target: KeysInterface<Signer = Signer>,
678 F::Target: FeeEstimator,
681 default_configuration: UserConfig,
682 genesis_hash: BlockHash,
688 pub(super) best_block: RwLock<BestBlock>,
690 best_block: RwLock<BestBlock>,
691 secp_ctx: Secp256k1<secp256k1::All>,
693 #[cfg(any(test, feature = "_test_utils"))]
694 pub(super) channel_state: Mutex<ChannelHolder<Signer>>,
695 #[cfg(not(any(test, feature = "_test_utils")))]
696 channel_state: Mutex<ChannelHolder<Signer>>,
698 /// Storage for PaymentSecrets and any requirements on future inbound payments before we will
699 /// expose them to users via a PaymentReceived event. HTLCs which do not meet the requirements
700 /// here are failed when we process them as pending-forwardable-HTLCs, and entries are removed
701 /// after we generate a PaymentReceived upon receipt of all MPP parts or when they time out.
702 /// Locked *after* channel_state.
703 pending_inbound_payments: Mutex<HashMap<PaymentHash, PendingInboundPayment>>,
705 /// The session_priv bytes and retry metadata of outbound payments which are pending resolution.
706 /// The authoritative state of these HTLCs resides either within Channels or ChannelMonitors
707 /// (if the channel has been force-closed), however we track them here to prevent duplicative
708 /// PaymentSent/PaymentPathFailed events. Specifically, in the case of a duplicative
709 /// update_fulfill_htlc message after a reconnect, we may "claim" a payment twice.
710 /// Additionally, because ChannelMonitors are often not re-serialized after connecting block(s)
711 /// which may generate a claim event, we may receive similar duplicate claim/fail MonitorEvents
712 /// after reloading from disk while replaying blocks against ChannelMonitors.
714 /// See `PendingOutboundPayment` documentation for more info.
716 /// Locked *after* channel_state.
717 pending_outbound_payments: Mutex<HashMap<PaymentId, PendingOutboundPayment>>,
719 /// The set of outbound SCID aliases across all our channels, including unconfirmed channels
720 /// and some closed channels which reached a usable state prior to being closed. This is used
721 /// only to avoid duplicates, and is not persisted explicitly to disk, but rebuilt from the
722 /// active channel list on load.
723 outbound_scid_aliases: Mutex<HashSet<u64>>,
725 our_network_key: SecretKey,
726 our_network_pubkey: PublicKey,
728 inbound_payment_key: inbound_payment::ExpandedKey,
730 /// LDK puts the [fake scids] that it generates into namespaces, to identify the type of an
731 /// incoming payment. To make it harder for a third-party to identify the type of a payment,
732 /// we encrypt the namespace identifier using these bytes.
734 /// [fake scids]: crate::util::scid_utils::fake_scid
735 fake_scid_rand_bytes: [u8; 32],
737 /// Used to track the last value sent in a node_announcement "timestamp" field. We ensure this
738 /// value increases strictly since we don't assume access to a time source.
739 last_node_announcement_serial: AtomicUsize,
741 /// The highest block timestamp we've seen, which is usually a good guess at the current time.
742 /// Assuming most miners are generating blocks with reasonable timestamps, this shouldn't be
743 /// very far in the past, and can only ever be up to two hours in the future.
744 highest_seen_timestamp: AtomicUsize,
746 /// The bulk of our storage will eventually be here (channels and message queues and the like).
747 /// If we are connected to a peer we always at least have an entry here, even if no channels
748 /// are currently open with that peer.
749 /// Because adding or removing an entry is rare, we usually take an outer read lock and then
750 /// operate on the inner value freely. Sadly, this prevents parallel operation when opening a
753 /// If also holding `channel_state` lock, must lock `channel_state` prior to `per_peer_state`.
754 per_peer_state: RwLock<HashMap<PublicKey, Mutex<PeerState>>>,
756 pending_events: Mutex<Vec<events::Event>>,
757 pending_background_events: Mutex<Vec<BackgroundEvent>>,
758 /// Used when we have to take a BIG lock to make sure everything is self-consistent.
759 /// Essentially just when we're serializing ourselves out.
760 /// Taken first everywhere where we are making changes before any other locks.
761 /// When acquiring this lock in read mode, rather than acquiring it directly, call
762 /// `PersistenceNotifierGuard::notify_on_drop(..)` and pass the lock to it, to ensure the
763 /// PersistenceNotifier the lock contains sends out a notification when the lock is released.
764 total_consistency_lock: RwLock<()>,
766 persistence_notifier: PersistenceNotifier,
773 /// Chain-related parameters used to construct a new `ChannelManager`.
775 /// Typically, the block-specific parameters are derived from the best block hash for the network,
776 /// as a newly constructed `ChannelManager` will not have created any channels yet. These parameters
777 /// are not needed when deserializing a previously constructed `ChannelManager`.
778 #[derive(Clone, Copy, PartialEq)]
779 pub struct ChainParameters {
780 /// The network for determining the `chain_hash` in Lightning messages.
781 pub network: Network,
783 /// The hash and height of the latest block successfully connected.
785 /// Used to track on-chain channel funding outputs and send payments with reliable timelocks.
786 pub best_block: BestBlock,
789 #[derive(Copy, Clone, PartialEq)]
795 /// Whenever we release the `ChannelManager`'s `total_consistency_lock`, from read mode, it is
796 /// desirable to notify any listeners on `await_persistable_update_timeout`/
797 /// `await_persistable_update` when new updates are available for persistence. Therefore, this
798 /// struct is responsible for locking the total consistency lock and, upon going out of scope,
799 /// sending the aforementioned notification (since the lock being released indicates that the
800 /// updates are ready for persistence).
802 /// We allow callers to either always notify by constructing with `notify_on_drop` or choose to
803 /// notify or not based on whether relevant changes have been made, providing a closure to
804 /// `optionally_notify` which returns a `NotifyOption`.
805 struct PersistenceNotifierGuard<'a, F: Fn() -> NotifyOption> {
806 persistence_notifier: &'a PersistenceNotifier,
808 // We hold onto this result so the lock doesn't get released immediately.
809 _read_guard: RwLockReadGuard<'a, ()>,
812 impl<'a> PersistenceNotifierGuard<'a, fn() -> NotifyOption> { // We don't care what the concrete F is here, it's unused
813 fn notify_on_drop(lock: &'a RwLock<()>, notifier: &'a PersistenceNotifier) -> PersistenceNotifierGuard<'a, impl Fn() -> NotifyOption> {
814 PersistenceNotifierGuard::optionally_notify(lock, notifier, || -> NotifyOption { NotifyOption::DoPersist })
817 fn optionally_notify<F: Fn() -> NotifyOption>(lock: &'a RwLock<()>, notifier: &'a PersistenceNotifier, persist_check: F) -> PersistenceNotifierGuard<'a, F> {
818 let read_guard = lock.read().unwrap();
820 PersistenceNotifierGuard {
821 persistence_notifier: notifier,
822 should_persist: persist_check,
823 _read_guard: read_guard,
828 impl<'a, F: Fn() -> NotifyOption> Drop for PersistenceNotifierGuard<'a, F> {
830 if (self.should_persist)() == NotifyOption::DoPersist {
831 self.persistence_notifier.notify();
836 /// The amount of time in blocks we require our counterparty wait to claim their money (ie time
837 /// between when we, or our watchtower, must check for them having broadcast a theft transaction).
839 /// This can be increased (but not decreased) through [`ChannelHandshakeConfig::our_to_self_delay`]
841 /// [`ChannelHandshakeConfig::our_to_self_delay`]: crate::util::config::ChannelHandshakeConfig::our_to_self_delay
842 pub const BREAKDOWN_TIMEOUT: u16 = 6 * 24;
843 /// The amount of time in blocks we're willing to wait to claim money back to us. This matches
844 /// the maximum required amount in lnd as of March 2021.
845 pub(crate) const MAX_LOCAL_BREAKDOWN_TIMEOUT: u16 = 2 * 6 * 24 * 7;
847 /// The minimum number of blocks between an inbound HTLC's CLTV and the corresponding outbound
848 /// HTLC's CLTV. The current default represents roughly seven hours of blocks at six blocks/hour.
850 /// This can be increased (but not decreased) through [`ChannelConfig::cltv_expiry_delta`]
852 /// [`ChannelConfig::cltv_expiry_delta`]: crate::util::config::ChannelConfig::cltv_expiry_delta
853 // This should always be a few blocks greater than channelmonitor::CLTV_CLAIM_BUFFER,
854 // i.e. the node we forwarded the payment on to should always have enough room to reliably time out
855 // the HTLC via a full update_fail_htlc/commitment_signed dance before we hit the
856 // CLTV_CLAIM_BUFFER point (we static assert that it's at least 3 blocks more).
857 pub const MIN_CLTV_EXPIRY_DELTA: u16 = 6*7;
858 pub(super) const CLTV_FAR_FAR_AWAY: u32 = 6 * 24 * 7; //TODO?
860 /// Minimum CLTV difference between the current block height and received inbound payments.
861 /// Invoices generated for payment to us must set their `min_final_cltv_expiry` field to at least
863 // Note that we fail if exactly HTLC_FAIL_BACK_BUFFER + 1 was used, so we need to add one for
864 // any payments to succeed. Further, we don't want payments to fail if a block was found while
865 // a payment was being routed, so we add an extra block to be safe.
866 pub const MIN_FINAL_CLTV_EXPIRY: u32 = HTLC_FAIL_BACK_BUFFER + 3;
868 // Check that our CLTV_EXPIRY is at least CLTV_CLAIM_BUFFER + ANTI_REORG_DELAY + LATENCY_GRACE_PERIOD_BLOCKS,
869 // ie that if the next-hop peer fails the HTLC within
870 // LATENCY_GRACE_PERIOD_BLOCKS then we'll still have CLTV_CLAIM_BUFFER left to timeout it onchain,
871 // then waiting ANTI_REORG_DELAY to be reorg-safe on the outbound HLTC and
872 // failing the corresponding htlc backward, and us now seeing the last block of ANTI_REORG_DELAY before
873 // LATENCY_GRACE_PERIOD_BLOCKS.
876 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;
878 // Check for ability of an attacker to make us fail on-chain by delaying an HTLC claim. See
879 // ChannelMonitor::should_broadcast_holder_commitment_txn for a description of why this is needed.
882 const CHECK_CLTV_EXPIRY_SANITY_2: u32 = MIN_CLTV_EXPIRY_DELTA as u32 - LATENCY_GRACE_PERIOD_BLOCKS - 2*CLTV_CLAIM_BUFFER;
884 /// The number of blocks before we consider an outbound payment for expiry if it doesn't have any
885 /// pending HTLCs in flight.
886 pub(crate) const PAYMENT_EXPIRY_BLOCKS: u32 = 3;
888 /// The number of ticks of [`ChannelManager::timer_tick_occurred`] until expiry of incomplete MPPs
889 pub(crate) const MPP_TIMEOUT_TICKS: u8 = 3;
891 /// Information needed for constructing an invoice route hint for this channel.
892 #[derive(Clone, Debug, PartialEq)]
893 pub struct CounterpartyForwardingInfo {
894 /// Base routing fee in millisatoshis.
895 pub fee_base_msat: u32,
896 /// Amount in millionths of a satoshi the channel will charge per transferred satoshi.
897 pub fee_proportional_millionths: u32,
898 /// The minimum difference in cltv_expiry between an ingoing HTLC and its outgoing counterpart,
899 /// such that the outgoing HTLC is forwardable to this counterparty. See `msgs::ChannelUpdate`'s
900 /// `cltv_expiry_delta` for more details.
901 pub cltv_expiry_delta: u16,
904 /// Channel parameters which apply to our counterparty. These are split out from [`ChannelDetails`]
905 /// to better separate parameters.
906 #[derive(Clone, Debug, PartialEq)]
907 pub struct ChannelCounterparty {
908 /// The node_id of our counterparty
909 pub node_id: PublicKey,
910 /// The Features the channel counterparty provided upon last connection.
911 /// Useful for routing as it is the most up-to-date copy of the counterparty's features and
912 /// many routing-relevant features are present in the init context.
913 pub features: InitFeatures,
914 /// The value, in satoshis, that must always be held in the channel for our counterparty. This
915 /// value ensures that if our counterparty broadcasts a revoked state, we can punish them by
916 /// claiming at least this value on chain.
918 /// This value is not included in [`inbound_capacity_msat`] as it can never be spent.
920 /// [`inbound_capacity_msat`]: ChannelDetails::inbound_capacity_msat
921 pub unspendable_punishment_reserve: u64,
922 /// Information on the fees and requirements that the counterparty requires when forwarding
923 /// payments to us through this channel.
924 pub forwarding_info: Option<CounterpartyForwardingInfo>,
925 /// The smallest value HTLC (in msat) the remote peer will accept, for this channel. This field
926 /// is only `None` before we have received either the `OpenChannel` or `AcceptChannel` message
927 /// from the remote peer, or for `ChannelCounterparty` objects serialized prior to LDK 0.0.107.
928 pub outbound_htlc_minimum_msat: Option<u64>,
929 /// The largest value HTLC (in msat) the remote peer currently will accept, for this channel.
930 pub outbound_htlc_maximum_msat: Option<u64>,
933 /// Details of a channel, as returned by ChannelManager::list_channels and ChannelManager::list_usable_channels
934 #[derive(Clone, Debug, PartialEq)]
935 pub struct ChannelDetails {
936 /// The channel's ID (prior to funding transaction generation, this is a random 32 bytes,
937 /// thereafter this is the txid of the funding transaction xor the funding transaction output).
938 /// Note that this means this value is *not* persistent - it can change once during the
939 /// lifetime of the channel.
940 pub channel_id: [u8; 32],
941 /// Parameters which apply to our counterparty. See individual fields for more information.
942 pub counterparty: ChannelCounterparty,
943 /// The Channel's funding transaction output, if we've negotiated the funding transaction with
944 /// our counterparty already.
946 /// Note that, if this has been set, `channel_id` will be equivalent to
947 /// `funding_txo.unwrap().to_channel_id()`.
948 pub funding_txo: Option<OutPoint>,
949 /// The features which this channel operates with. See individual features for more info.
951 /// `None` until negotiation completes and the channel type is finalized.
952 pub channel_type: Option<ChannelTypeFeatures>,
953 /// The position of the funding transaction in the chain. None if the funding transaction has
954 /// not yet been confirmed and the channel fully opened.
956 /// Note that if [`inbound_scid_alias`] is set, it must be used for invoices and inbound
957 /// payments instead of this. See [`get_inbound_payment_scid`].
959 /// [`inbound_scid_alias`]: Self::inbound_scid_alias
960 /// [`get_inbound_payment_scid`]: Self::get_inbound_payment_scid
961 pub short_channel_id: Option<u64>,
962 /// An optional [`short_channel_id`] alias for this channel, randomly generated by our
963 /// counterparty and usable in place of [`short_channel_id`] in invoice route hints. Our
964 /// counterparty will recognize the alias provided here in place of the [`short_channel_id`]
965 /// when they see a payment to be routed to us.
967 /// Our counterparty may choose to rotate this value at any time, though will always recognize
968 /// previous values for inbound payment forwarding.
970 /// [`short_channel_id`]: Self::short_channel_id
971 pub inbound_scid_alias: Option<u64>,
972 /// The value, in satoshis, of this channel as appears in the funding output
973 pub channel_value_satoshis: u64,
974 /// The value, in satoshis, that must always be held in the channel for us. This value ensures
975 /// that if we broadcast a revoked state, our counterparty can punish us by claiming at least
976 /// this value on chain.
978 /// This value is not included in [`outbound_capacity_msat`] as it can never be spent.
980 /// This value will be `None` for outbound channels until the counterparty accepts the channel.
982 /// [`outbound_capacity_msat`]: ChannelDetails::outbound_capacity_msat
983 pub unspendable_punishment_reserve: Option<u64>,
984 /// The `user_channel_id` passed in to create_channel, or 0 if the channel was inbound.
985 pub user_channel_id: u64,
986 /// Our total balance. This is the amount we would get if we close the channel.
987 /// This value is not exact. Due to various in-flight changes and feerate changes, exactly this
988 /// amount is not likely to be recoverable on close.
990 /// This does not include any pending HTLCs which are not yet fully resolved (and, thus, whose
991 /// balance is not available for inclusion in new outbound HTLCs). This further does not include
992 /// any pending outgoing HTLCs which are awaiting some other resolution to be sent.
993 /// This does not consider any on-chain fees.
995 /// See also [`ChannelDetails::outbound_capacity_msat`]
996 pub balance_msat: u64,
997 /// The available outbound capacity for sending HTLCs to the remote peer. This does not include
998 /// any pending HTLCs which are not yet fully resolved (and, thus, whose balance is not
999 /// available for inclusion in new outbound HTLCs). This further does not include any pending
1000 /// outgoing HTLCs which are awaiting some other resolution to be sent.
1002 /// See also [`ChannelDetails::balance_msat`]
1004 /// This value is not exact. Due to various in-flight changes, feerate changes, and our
1005 /// conflict-avoidance policy, exactly this amount is not likely to be spendable. However, we
1006 /// should be able to spend nearly this amount.
1007 pub outbound_capacity_msat: u64,
1008 /// The available outbound capacity for sending a single HTLC to the remote peer. This is
1009 /// similar to [`ChannelDetails::outbound_capacity_msat`] but it may be further restricted by
1010 /// the current state and per-HTLC limit(s). This is intended for use when routing, allowing us
1011 /// to use a limit as close as possible to the HTLC limit we can currently send.
1013 /// See also [`ChannelDetails::balance_msat`] and [`ChannelDetails::outbound_capacity_msat`].
1014 pub next_outbound_htlc_limit_msat: u64,
1015 /// The available inbound capacity for the remote peer to send HTLCs to us. This does not
1016 /// include any pending HTLCs which are not yet fully resolved (and, thus, whose balance is not
1017 /// available for inclusion in new inbound HTLCs).
1018 /// Note that there are some corner cases not fully handled here, so the actual available
1019 /// inbound capacity may be slightly higher than this.
1021 /// This value is not exact. Due to various in-flight changes, feerate changes, and our
1022 /// counterparty's conflict-avoidance policy, exactly this amount is not likely to be spendable.
1023 /// However, our counterparty should be able to spend nearly this amount.
1024 pub inbound_capacity_msat: u64,
1025 /// The number of required confirmations on the funding transaction before the funding will be
1026 /// considered "locked". This number is selected by the channel fundee (i.e. us if
1027 /// [`is_outbound`] is *not* set), and can be selected for inbound channels with
1028 /// [`ChannelHandshakeConfig::minimum_depth`] or limited for outbound channels with
1029 /// [`ChannelHandshakeLimits::max_minimum_depth`].
1031 /// This value will be `None` for outbound channels until the counterparty accepts the channel.
1033 /// [`is_outbound`]: ChannelDetails::is_outbound
1034 /// [`ChannelHandshakeConfig::minimum_depth`]: crate::util::config::ChannelHandshakeConfig::minimum_depth
1035 /// [`ChannelHandshakeLimits::max_minimum_depth`]: crate::util::config::ChannelHandshakeLimits::max_minimum_depth
1036 pub confirmations_required: Option<u32>,
1037 /// The number of blocks (after our commitment transaction confirms) that we will need to wait
1038 /// until we can claim our funds after we force-close the channel. During this time our
1039 /// counterparty is allowed to punish us if we broadcasted a stale state. If our counterparty
1040 /// force-closes the channel and broadcasts a commitment transaction we do not have to wait any
1041 /// time to claim our non-HTLC-encumbered funds.
1043 /// This value will be `None` for outbound channels until the counterparty accepts the channel.
1044 pub force_close_spend_delay: Option<u16>,
1045 /// True if the channel was initiated (and thus funded) by us.
1046 pub is_outbound: bool,
1047 /// True if the channel is confirmed, funding_locked messages have been exchanged, and the
1048 /// channel is not currently being shut down. `funding_locked` message exchange implies the
1049 /// required confirmation count has been reached (and we were connected to the peer at some
1050 /// point after the funding transaction received enough confirmations). The required
1051 /// confirmation count is provided in [`confirmations_required`].
1053 /// [`confirmations_required`]: ChannelDetails::confirmations_required
1054 pub is_funding_locked: bool,
1055 /// True if the channel is (a) confirmed and funding_locked messages have been exchanged, (b)
1056 /// the peer is connected, and (c) the channel is not currently negotiating a shutdown.
1058 /// This is a strict superset of `is_funding_locked`.
1059 pub is_usable: bool,
1060 /// True if this channel is (or will be) publicly-announced.
1061 pub is_public: bool,
1062 /// The smallest value HTLC (in msat) we will accept, for this channel. This field
1063 /// is only `None` for `ChannelDetails` objects serialized prior to LDK 0.0.107
1064 pub inbound_htlc_minimum_msat: Option<u64>,
1065 /// The largest value HTLC (in msat) we currently will accept, for this channel.
1066 pub inbound_htlc_maximum_msat: Option<u64>,
1069 impl ChannelDetails {
1070 /// Gets the current SCID which should be used to identify this channel for inbound payments.
1071 /// This should be used for providing invoice hints or in any other context where our
1072 /// counterparty will forward a payment to us.
1074 /// This is either the [`ChannelDetails::inbound_scid_alias`], if set, or the
1075 /// [`ChannelDetails::short_channel_id`]. See those for more information.
1076 pub fn get_inbound_payment_scid(&self) -> Option<u64> {
1077 self.inbound_scid_alias.or(self.short_channel_id)
1081 /// If a payment fails to send, it can be in one of several states. This enum is returned as the
1082 /// Err() type describing which state the payment is in, see the description of individual enum
1083 /// states for more.
1084 #[derive(Clone, Debug)]
1085 pub enum PaymentSendFailure {
1086 /// A parameter which was passed to send_payment was invalid, preventing us from attempting to
1087 /// send the payment at all. No channel state has been changed or messages sent to peers, and
1088 /// once you've changed the parameter at error, you can freely retry the payment in full.
1089 ParameterError(APIError),
1090 /// A parameter in a single path which was passed to send_payment was invalid, preventing us
1091 /// from attempting to send the payment at all. No channel state has been changed or messages
1092 /// sent to peers, and once you've changed the parameter at error, you can freely retry the
1093 /// payment in full.
1095 /// The results here are ordered the same as the paths in the route object which was passed to
1097 PathParameterError(Vec<Result<(), APIError>>),
1098 /// All paths which were attempted failed to send, with no channel state change taking place.
1099 /// You can freely retry the payment in full (though you probably want to do so over different
1100 /// paths than the ones selected).
1101 AllFailedRetrySafe(Vec<APIError>),
1102 /// Some paths which were attempted failed to send, though possibly not all. At least some
1103 /// paths have irrevocably committed to the HTLC and retrying the payment in full would result
1104 /// in over-/re-payment.
1106 /// The results here are ordered the same as the paths in the route object which was passed to
1107 /// send_payment, and any Errs which are not APIError::MonitorUpdateFailed can be safely
1108 /// retried (though there is currently no API with which to do so).
1110 /// Any entries which contain Err(APIError::MonitorUpdateFailed) or Ok(()) MUST NOT be retried
1111 /// as they will result in over-/re-payment. These HTLCs all either successfully sent (in the
1112 /// case of Ok(())) or will send once channel_monitor_updated is called on the next-hop channel
1113 /// with the latest update_id.
1115 /// The errors themselves, in the same order as the route hops.
1116 results: Vec<Result<(), APIError>>,
1117 /// If some paths failed without irrevocably committing to the new HTLC(s), this will
1118 /// contain a [`RouteParameters`] object which can be used to calculate a new route that
1119 /// will pay all remaining unpaid balance.
1120 failed_paths_retry: Option<RouteParameters>,
1121 /// The payment id for the payment, which is now at least partially pending.
1122 payment_id: PaymentId,
1126 /// Route hints used in constructing invoices for [phantom node payents].
1128 /// [phantom node payments]: crate::chain::keysinterface::PhantomKeysManager
1130 pub struct PhantomRouteHints {
1131 /// The list of channels to be included in the invoice route hints.
1132 pub channels: Vec<ChannelDetails>,
1133 /// A fake scid used for representing the phantom node's fake channel in generating the invoice
1135 pub phantom_scid: u64,
1136 /// The pubkey of the real backing node that would ultimately receive the payment.
1137 pub real_node_pubkey: PublicKey,
1140 macro_rules! handle_error {
1141 ($self: ident, $internal: expr, $counterparty_node_id: expr) => {
1144 Err(MsgHandleErrInternal { err, chan_id, shutdown_finish }) => {
1145 #[cfg(debug_assertions)]
1147 // In testing, ensure there are no deadlocks where the lock is already held upon
1148 // entering the macro.
1149 assert!($self.channel_state.try_lock().is_ok());
1150 assert!($self.pending_events.try_lock().is_ok());
1153 let mut msg_events = Vec::with_capacity(2);
1155 if let Some((shutdown_res, update_option)) = shutdown_finish {
1156 $self.finish_force_close_channel(shutdown_res);
1157 if let Some(update) = update_option {
1158 msg_events.push(events::MessageSendEvent::BroadcastChannelUpdate {
1162 if let Some((channel_id, user_channel_id)) = chan_id {
1163 $self.pending_events.lock().unwrap().push(events::Event::ChannelClosed {
1164 channel_id, user_channel_id,
1165 reason: ClosureReason::ProcessingError { err: err.err.clone() }
1170 log_error!($self.logger, "{}", err.err);
1171 if let msgs::ErrorAction::IgnoreError = err.action {
1173 msg_events.push(events::MessageSendEvent::HandleError {
1174 node_id: $counterparty_node_id,
1175 action: err.action.clone()
1179 if !msg_events.is_empty() {
1180 $self.channel_state.lock().unwrap().pending_msg_events.append(&mut msg_events);
1183 // Return error in case higher-API need one
1190 macro_rules! update_maps_on_chan_removal {
1191 ($self: expr, $short_to_id: expr, $channel: expr) => {
1192 if let Some(short_id) = $channel.get_short_channel_id() {
1193 $short_to_id.remove(&short_id);
1195 // If the channel was never confirmed on-chain prior to its closure, remove the
1196 // outbound SCID alias we used for it from the collision-prevention set. While we
1197 // generally want to avoid ever re-using an outbound SCID alias across all channels, we
1198 // also don't want a counterparty to be able to trivially cause a memory leak by simply
1199 // opening a million channels with us which are closed before we ever reach the funding
1201 let alias_removed = $self.outbound_scid_aliases.lock().unwrap().remove(&$channel.outbound_scid_alias());
1202 debug_assert!(alias_removed);
1204 $short_to_id.remove(&$channel.outbound_scid_alias());
1208 /// Returns (boolean indicating if we should remove the Channel object from memory, a mapped error)
1209 macro_rules! convert_chan_err {
1210 ($self: ident, $err: expr, $short_to_id: expr, $channel: expr, $channel_id: expr) => {
1212 ChannelError::Warn(msg) => {
1213 (false, MsgHandleErrInternal::from_chan_no_close(ChannelError::Warn(msg), $channel_id.clone()))
1215 ChannelError::Ignore(msg) => {
1216 (false, MsgHandleErrInternal::from_chan_no_close(ChannelError::Ignore(msg), $channel_id.clone()))
1218 ChannelError::Close(msg) => {
1219 log_error!($self.logger, "Closing channel {} due to close-required error: {}", log_bytes!($channel_id[..]), msg);
1220 update_maps_on_chan_removal!($self, $short_to_id, $channel);
1221 let shutdown_res = $channel.force_shutdown(true);
1222 (true, MsgHandleErrInternal::from_finish_shutdown(msg, *$channel_id, $channel.get_user_id(),
1223 shutdown_res, $self.get_channel_update_for_broadcast(&$channel).ok()))
1225 ChannelError::CloseDelayBroadcast(msg) => {
1226 log_error!($self.logger, "Channel {} need to be shutdown but closing transactions not broadcast due to {}", log_bytes!($channel_id[..]), msg);
1227 update_maps_on_chan_removal!($self, $short_to_id, $channel);
1228 let shutdown_res = $channel.force_shutdown(false);
1229 (true, MsgHandleErrInternal::from_finish_shutdown(msg, *$channel_id, $channel.get_user_id(),
1230 shutdown_res, $self.get_channel_update_for_broadcast(&$channel).ok()))
1236 macro_rules! break_chan_entry {
1237 ($self: ident, $res: expr, $channel_state: expr, $entry: expr) => {
1241 let (drop, res) = convert_chan_err!($self, e, $channel_state.short_to_id, $entry.get_mut(), $entry.key());
1243 $entry.remove_entry();
1251 macro_rules! try_chan_entry {
1252 ($self: ident, $res: expr, $channel_state: expr, $entry: expr) => {
1256 let (drop, res) = convert_chan_err!($self, e, $channel_state.short_to_id, $entry.get_mut(), $entry.key());
1258 $entry.remove_entry();
1266 macro_rules! remove_channel {
1267 ($self: expr, $channel_state: expr, $entry: expr) => {
1269 let channel = $entry.remove_entry().1;
1270 update_maps_on_chan_removal!($self, $channel_state.short_to_id, channel);
1276 macro_rules! handle_monitor_err {
1277 ($self: ident, $err: expr, $short_to_id: expr, $chan: expr, $action_type: path, $resend_raa: expr, $resend_commitment: expr, $failed_forwards: expr, $failed_fails: expr, $failed_finalized_fulfills: expr, $chan_id: expr) => {
1279 ChannelMonitorUpdateErr::PermanentFailure => {
1280 log_error!($self.logger, "Closing channel {} due to monitor update ChannelMonitorUpdateErr::PermanentFailure", log_bytes!($chan_id[..]));
1281 update_maps_on_chan_removal!($self, $short_to_id, $chan);
1282 // TODO: $failed_fails is dropped here, which will cause other channels to hit the
1283 // chain in a confused state! We need to move them into the ChannelMonitor which
1284 // will be responsible for failing backwards once things confirm on-chain.
1285 // It's ok that we drop $failed_forwards here - at this point we'd rather they
1286 // broadcast HTLC-Timeout and pay the associated fees to get their funds back than
1287 // us bother trying to claim it just to forward on to another peer. If we're
1288 // splitting hairs we'd prefer to claim payments that were to us, but we haven't
1289 // given up the preimage yet, so might as well just wait until the payment is
1290 // retried, avoiding the on-chain fees.
1291 let res: Result<(), _> = Err(MsgHandleErrInternal::from_finish_shutdown("ChannelMonitor storage failure".to_owned(), *$chan_id, $chan.get_user_id(),
1292 $chan.force_shutdown(true), $self.get_channel_update_for_broadcast(&$chan).ok() ));
1295 ChannelMonitorUpdateErr::TemporaryFailure => {
1296 log_info!($self.logger, "Disabling channel {} due to monitor update TemporaryFailure. On restore will send {} and process {} forwards, {} fails, and {} fulfill finalizations",
1297 log_bytes!($chan_id[..]),
1298 if $resend_commitment && $resend_raa {
1299 match $action_type {
1300 RAACommitmentOrder::CommitmentFirst => { "commitment then RAA" },
1301 RAACommitmentOrder::RevokeAndACKFirst => { "RAA then commitment" },
1303 } else if $resend_commitment { "commitment" }
1304 else if $resend_raa { "RAA" }
1306 (&$failed_forwards as &Vec<(PendingHTLCInfo, u64)>).len(),
1307 (&$failed_fails as &Vec<(HTLCSource, PaymentHash, HTLCFailReason)>).len(),
1308 (&$failed_finalized_fulfills as &Vec<HTLCSource>).len());
1309 if !$resend_commitment {
1310 debug_assert!($action_type == RAACommitmentOrder::RevokeAndACKFirst || !$resend_raa);
1313 debug_assert!($action_type == RAACommitmentOrder::CommitmentFirst || !$resend_commitment);
1315 $chan.monitor_update_failed($resend_raa, $resend_commitment, $failed_forwards, $failed_fails, $failed_finalized_fulfills);
1316 (Err(MsgHandleErrInternal::from_chan_no_close(ChannelError::Ignore("Failed to update ChannelMonitor".to_owned()), *$chan_id)), false)
1320 ($self: ident, $err: expr, $channel_state: expr, $entry: expr, $action_type: path, $resend_raa: expr, $resend_commitment: expr, $failed_forwards: expr, $failed_fails: expr, $failed_finalized_fulfills: expr) => { {
1321 let (res, drop) = handle_monitor_err!($self, $err, $channel_state.short_to_id, $entry.get_mut(), $action_type, $resend_raa, $resend_commitment, $failed_forwards, $failed_fails, $failed_finalized_fulfills, $entry.key());
1323 $entry.remove_entry();
1327 ($self: ident, $err: expr, $channel_state: expr, $entry: expr, $action_type: path, $chan_id: expr, COMMITMENT_UPDATE_ONLY) => { {
1328 debug_assert!($action_type == RAACommitmentOrder::CommitmentFirst);
1329 handle_monitor_err!($self, $err, $channel_state, $entry, $action_type, false, true, Vec::new(), Vec::new(), Vec::new(), $chan_id)
1331 ($self: ident, $err: expr, $channel_state: expr, $entry: expr, $action_type: path, $chan_id: expr, NO_UPDATE) => {
1332 handle_monitor_err!($self, $err, $channel_state, $entry, $action_type, false, false, Vec::new(), Vec::new(), Vec::new(), $chan_id)
1334 ($self: ident, $err: expr, $channel_state: expr, $entry: expr, $action_type: path, $resend_raa: expr, $resend_commitment: expr) => {
1335 handle_monitor_err!($self, $err, $channel_state, $entry, $action_type, $resend_raa, $resend_commitment, Vec::new(), Vec::new(), Vec::new())
1337 ($self: ident, $err: expr, $channel_state: expr, $entry: expr, $action_type: path, $resend_raa: expr, $resend_commitment: expr, $failed_forwards: expr, $failed_fails: expr) => {
1338 handle_monitor_err!($self, $err, $channel_state, $entry, $action_type, $resend_raa, $resend_commitment, $failed_forwards, $failed_fails, Vec::new())
1342 macro_rules! return_monitor_err {
1343 ($self: ident, $err: expr, $channel_state: expr, $entry: expr, $action_type: path, $resend_raa: expr, $resend_commitment: expr) => {
1344 return handle_monitor_err!($self, $err, $channel_state, $entry, $action_type, $resend_raa, $resend_commitment);
1346 ($self: ident, $err: expr, $channel_state: expr, $entry: expr, $action_type: path, $resend_raa: expr, $resend_commitment: expr, $failed_forwards: expr, $failed_fails: expr) => {
1347 return handle_monitor_err!($self, $err, $channel_state, $entry, $action_type, $resend_raa, $resend_commitment, $failed_forwards, $failed_fails);
1351 // Does not break in case of TemporaryFailure!
1352 macro_rules! maybe_break_monitor_err {
1353 ($self: ident, $err: expr, $channel_state: expr, $entry: expr, $action_type: path, $resend_raa: expr, $resend_commitment: expr) => {
1354 match (handle_monitor_err!($self, $err, $channel_state, $entry, $action_type, $resend_raa, $resend_commitment), $err) {
1355 (e, ChannelMonitorUpdateErr::PermanentFailure) => {
1358 (_, ChannelMonitorUpdateErr::TemporaryFailure) => { },
1363 macro_rules! send_funding_locked {
1364 ($short_to_id: expr, $pending_msg_events: expr, $channel: expr, $funding_locked_msg: expr) => {
1365 $pending_msg_events.push(events::MessageSendEvent::SendFundingLocked {
1366 node_id: $channel.get_counterparty_node_id(),
1367 msg: $funding_locked_msg,
1369 // Note that we may send a funding locked multiple times for a channel if we reconnect, so
1370 // we allow collisions, but we shouldn't ever be updating the channel ID pointed to.
1371 let outbound_alias_insert = $short_to_id.insert($channel.outbound_scid_alias(), $channel.channel_id());
1372 assert!(outbound_alias_insert.is_none() || outbound_alias_insert.unwrap() == $channel.channel_id(),
1373 "SCIDs should never collide - ensure you weren't behind the chain tip by a full month when creating channels");
1374 if let Some(real_scid) = $channel.get_short_channel_id() {
1375 let scid_insert = $short_to_id.insert(real_scid, $channel.channel_id());
1376 assert!(scid_insert.is_none() || scid_insert.unwrap() == $channel.channel_id(),
1377 "SCIDs should never collide - ensure you weren't behind the chain tip by a full month when creating channels");
1382 macro_rules! handle_chan_restoration_locked {
1383 ($self: ident, $channel_lock: expr, $channel_state: expr, $channel_entry: expr,
1384 $raa: expr, $commitment_update: expr, $order: expr, $chanmon_update: expr,
1385 $pending_forwards: expr, $funding_broadcastable: expr, $funding_locked: expr, $announcement_sigs: expr) => { {
1386 let mut htlc_forwards = None;
1388 let chanmon_update: Option<ChannelMonitorUpdate> = $chanmon_update; // Force type-checking to resolve
1389 let chanmon_update_is_none = chanmon_update.is_none();
1390 let counterparty_node_id = $channel_entry.get().get_counterparty_node_id();
1392 let forwards: Vec<(PendingHTLCInfo, u64)> = $pending_forwards; // Force type-checking to resolve
1393 if !forwards.is_empty() {
1394 htlc_forwards = Some(($channel_entry.get().get_short_channel_id().expect("We can't have pending forwards before funding confirmation"),
1395 $channel_entry.get().get_funding_txo().unwrap(), forwards));
1398 if chanmon_update.is_some() {
1399 // On reconnect, we, by definition, only resend a funding_locked if there have been
1400 // no commitment updates, so the only channel monitor update which could also be
1401 // associated with a funding_locked would be the funding_created/funding_signed
1402 // monitor update. That monitor update failing implies that we won't send
1403 // funding_locked until it's been updated, so we can't have a funding_locked and a
1404 // monitor update here (so we don't bother to handle it correctly below).
1405 assert!($funding_locked.is_none());
1406 // A channel monitor update makes no sense without either a funding_locked or a
1407 // commitment update to process after it. Since we can't have a funding_locked, we
1408 // only bother to handle the monitor-update + commitment_update case below.
1409 assert!($commitment_update.is_some());
1412 if let Some(msg) = $funding_locked {
1413 // Similar to the above, this implies that we're letting the funding_locked fly
1414 // before it should be allowed to.
1415 assert!(chanmon_update.is_none());
1416 send_funding_locked!($channel_state.short_to_id, $channel_state.pending_msg_events, $channel_entry.get(), msg);
1418 if let Some(msg) = $announcement_sigs {
1419 $channel_state.pending_msg_events.push(events::MessageSendEvent::SendAnnouncementSignatures {
1420 node_id: counterparty_node_id,
1425 let funding_broadcastable: Option<Transaction> = $funding_broadcastable; // Force type-checking to resolve
1426 if let Some(monitor_update) = chanmon_update {
1427 // We only ever broadcast a funding transaction in response to a funding_signed
1428 // message and the resulting monitor update. Thus, on channel_reestablish
1429 // message handling we can't have a funding transaction to broadcast. When
1430 // processing a monitor update finishing resulting in a funding broadcast, we
1431 // cannot have a second monitor update, thus this case would indicate a bug.
1432 assert!(funding_broadcastable.is_none());
1433 // Given we were just reconnected or finished updating a channel monitor, the
1434 // only case where we can get a new ChannelMonitorUpdate would be if we also
1435 // have some commitment updates to send as well.
1436 assert!($commitment_update.is_some());
1437 if let Err(e) = $self.chain_monitor.update_channel($channel_entry.get().get_funding_txo().unwrap(), monitor_update) {
1438 // channel_reestablish doesn't guarantee the order it returns is sensical
1439 // for the messages it returns, but if we're setting what messages to
1440 // re-transmit on monitor update success, we need to make sure it is sane.
1441 let mut order = $order;
1443 order = RAACommitmentOrder::CommitmentFirst;
1445 break handle_monitor_err!($self, e, $channel_state, $channel_entry, order, $raa.is_some(), true);
1449 macro_rules! handle_cs { () => {
1450 if let Some(update) = $commitment_update {
1451 $channel_state.pending_msg_events.push(events::MessageSendEvent::UpdateHTLCs {
1452 node_id: counterparty_node_id,
1457 macro_rules! handle_raa { () => {
1458 if let Some(revoke_and_ack) = $raa {
1459 $channel_state.pending_msg_events.push(events::MessageSendEvent::SendRevokeAndACK {
1460 node_id: counterparty_node_id,
1461 msg: revoke_and_ack,
1466 RAACommitmentOrder::CommitmentFirst => {
1470 RAACommitmentOrder::RevokeAndACKFirst => {
1475 if let Some(tx) = funding_broadcastable {
1476 log_info!($self.logger, "Broadcasting funding transaction with txid {}", tx.txid());
1477 $self.tx_broadcaster.broadcast_transaction(&tx);
1482 if chanmon_update_is_none {
1483 // If there was no ChannelMonitorUpdate, we should never generate an Err in the res loop
1484 // above. Doing so would imply calling handle_err!() from channel_monitor_updated() which
1485 // should *never* end up calling back to `chain_monitor.update_channel()`.
1486 assert!(res.is_ok());
1489 (htlc_forwards, res, counterparty_node_id)
1493 macro_rules! post_handle_chan_restoration {
1494 ($self: ident, $locked_res: expr) => { {
1495 let (htlc_forwards, res, counterparty_node_id) = $locked_res;
1497 let _ = handle_error!($self, res, counterparty_node_id);
1499 if let Some(forwards) = htlc_forwards {
1500 $self.forward_htlcs(&mut [forwards][..]);
1505 impl<Signer: Sign, M: Deref, T: Deref, K: Deref, F: Deref, L: Deref> ChannelManager<Signer, M, T, K, F, L>
1506 where M::Target: chain::Watch<Signer>,
1507 T::Target: BroadcasterInterface,
1508 K::Target: KeysInterface<Signer = Signer>,
1509 F::Target: FeeEstimator,
1512 /// Constructs a new ChannelManager to hold several channels and route between them.
1514 /// This is the main "logic hub" for all channel-related actions, and implements
1515 /// ChannelMessageHandler.
1517 /// Non-proportional fees are fixed according to our risk using the provided fee estimator.
1519 /// Users need to notify the new ChannelManager when a new block is connected or
1520 /// disconnected using its `block_connected` and `block_disconnected` methods, starting
1521 /// from after `params.latest_hash`.
1522 pub fn new(fee_est: F, chain_monitor: M, tx_broadcaster: T, logger: L, keys_manager: K, config: UserConfig, params: ChainParameters) -> Self {
1523 let mut secp_ctx = Secp256k1::new();
1524 secp_ctx.seeded_randomize(&keys_manager.get_secure_random_bytes());
1525 let inbound_pmt_key_material = keys_manager.get_inbound_payment_key_material();
1526 let expanded_inbound_key = inbound_payment::ExpandedKey::new(&inbound_pmt_key_material);
1528 default_configuration: config.clone(),
1529 genesis_hash: genesis_block(params.network).header.block_hash(),
1530 fee_estimator: fee_est,
1534 best_block: RwLock::new(params.best_block),
1536 channel_state: Mutex::new(ChannelHolder{
1537 by_id: HashMap::new(),
1538 short_to_id: HashMap::new(),
1539 forward_htlcs: HashMap::new(),
1540 claimable_htlcs: HashMap::new(),
1541 pending_msg_events: Vec::new(),
1543 outbound_scid_aliases: Mutex::new(HashSet::new()),
1544 pending_inbound_payments: Mutex::new(HashMap::new()),
1545 pending_outbound_payments: Mutex::new(HashMap::new()),
1547 our_network_key: keys_manager.get_node_secret(Recipient::Node).unwrap(),
1548 our_network_pubkey: PublicKey::from_secret_key(&secp_ctx, &keys_manager.get_node_secret(Recipient::Node).unwrap()),
1551 inbound_payment_key: expanded_inbound_key,
1552 fake_scid_rand_bytes: keys_manager.get_secure_random_bytes(),
1554 last_node_announcement_serial: AtomicUsize::new(0),
1555 highest_seen_timestamp: AtomicUsize::new(0),
1557 per_peer_state: RwLock::new(HashMap::new()),
1559 pending_events: Mutex::new(Vec::new()),
1560 pending_background_events: Mutex::new(Vec::new()),
1561 total_consistency_lock: RwLock::new(()),
1562 persistence_notifier: PersistenceNotifier::new(),
1570 /// Gets the current configuration applied to all new channels, as
1571 pub fn get_current_default_configuration(&self) -> &UserConfig {
1572 &self.default_configuration
1575 fn create_and_insert_outbound_scid_alias(&self) -> u64 {
1576 let height = self.best_block.read().unwrap().height();
1577 let mut outbound_scid_alias = 0;
1580 if cfg!(fuzzing) { // fuzzing chacha20 doesn't use the key at all so we always get the same alias
1581 outbound_scid_alias += 1;
1583 outbound_scid_alias = fake_scid::Namespace::OutboundAlias.get_fake_scid(height, &self.genesis_hash, &self.fake_scid_rand_bytes, &self.keys_manager);
1585 if outbound_scid_alias != 0 && self.outbound_scid_aliases.lock().unwrap().insert(outbound_scid_alias) {
1589 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"); }
1594 /// Creates a new outbound channel to the given remote node and with the given value.
1596 /// `user_channel_id` will be provided back as in
1597 /// [`Event::FundingGenerationReady::user_channel_id`] to allow tracking of which events
1598 /// correspond with which `create_channel` call. Note that the `user_channel_id` defaults to 0
1599 /// for inbound channels, so you may wish to avoid using 0 for `user_channel_id` here.
1600 /// `user_channel_id` has no meaning inside of LDK, it is simply copied to events and otherwise
1603 /// Raises [`APIError::APIMisuseError`] when `channel_value_satoshis` > 2**24 or `push_msat` is
1604 /// greater than `channel_value_satoshis * 1k` or `channel_value_satoshis < 1000`.
1606 /// Note that we do not check if you are currently connected to the given peer. If no
1607 /// connection is available, the outbound `open_channel` message may fail to send, resulting in
1608 /// the channel eventually being silently forgotten (dropped on reload).
1610 /// Returns the new Channel's temporary `channel_id`. This ID will appear as
1611 /// [`Event::FundingGenerationReady::temporary_channel_id`] and in
1612 /// [`ChannelDetails::channel_id`] until after
1613 /// [`ChannelManager::funding_transaction_generated`] is called, swapping the Channel's ID for
1614 /// one derived from the funding transaction's TXID. If the counterparty rejects the channel
1615 /// immediately, this temporary ID will appear in [`Event::ChannelClosed::channel_id`].
1617 /// [`Event::FundingGenerationReady::user_channel_id`]: events::Event::FundingGenerationReady::user_channel_id
1618 /// [`Event::FundingGenerationReady::temporary_channel_id`]: events::Event::FundingGenerationReady::temporary_channel_id
1619 /// [`Event::ChannelClosed::channel_id`]: events::Event::ChannelClosed::channel_id
1620 pub fn create_channel(&self, their_network_key: PublicKey, channel_value_satoshis: u64, push_msat: u64, user_channel_id: u64, override_config: Option<UserConfig>) -> Result<[u8; 32], APIError> {
1621 if channel_value_satoshis < 1000 {
1622 return Err(APIError::APIMisuseError { err: format!("Channel value must be at least 1000 satoshis. It was {}", channel_value_satoshis) });
1626 let per_peer_state = self.per_peer_state.read().unwrap();
1627 match per_peer_state.get(&their_network_key) {
1628 Some(peer_state) => {
1629 let outbound_scid_alias = self.create_and_insert_outbound_scid_alias();
1630 let peer_state = peer_state.lock().unwrap();
1631 let their_features = &peer_state.latest_features;
1632 let config = if override_config.is_some() { override_config.as_ref().unwrap() } else { &self.default_configuration };
1633 match Channel::new_outbound(&self.fee_estimator, &self.keys_manager, their_network_key,
1634 their_features, channel_value_satoshis, push_msat, user_channel_id, config,
1635 self.best_block.read().unwrap().height(), outbound_scid_alias)
1639 self.outbound_scid_aliases.lock().unwrap().remove(&outbound_scid_alias);
1644 None => return Err(APIError::ChannelUnavailable { err: format!("Not connected to node: {}", their_network_key) }),
1647 let res = channel.get_open_channel(self.genesis_hash.clone());
1649 let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self.total_consistency_lock, &self.persistence_notifier);
1650 // We want to make sure the lock is actually acquired by PersistenceNotifierGuard.
1651 debug_assert!(&self.total_consistency_lock.try_write().is_err());
1653 let temporary_channel_id = channel.channel_id();
1654 let mut channel_state = self.channel_state.lock().unwrap();
1655 match channel_state.by_id.entry(temporary_channel_id) {
1656 hash_map::Entry::Occupied(_) => {
1658 return Err(APIError::APIMisuseError { err: "Fuzzy bad RNG".to_owned() });
1660 panic!("RNG is bad???");
1663 hash_map::Entry::Vacant(entry) => { entry.insert(channel); }
1665 channel_state.pending_msg_events.push(events::MessageSendEvent::SendOpenChannel {
1666 node_id: their_network_key,
1669 Ok(temporary_channel_id)
1672 fn list_channels_with_filter<Fn: FnMut(&(&[u8; 32], &Channel<Signer>)) -> bool>(&self, f: Fn) -> Vec<ChannelDetails> {
1673 let mut res = Vec::new();
1675 let channel_state = self.channel_state.lock().unwrap();
1676 res.reserve(channel_state.by_id.len());
1677 for (channel_id, channel) in channel_state.by_id.iter().filter(f) {
1678 let balance = channel.get_available_balances();
1679 let (to_remote_reserve_satoshis, to_self_reserve_satoshis) =
1680 channel.get_holder_counterparty_selected_channel_reserve_satoshis();
1681 res.push(ChannelDetails {
1682 channel_id: (*channel_id).clone(),
1683 counterparty: ChannelCounterparty {
1684 node_id: channel.get_counterparty_node_id(),
1685 features: InitFeatures::empty(),
1686 unspendable_punishment_reserve: to_remote_reserve_satoshis,
1687 forwarding_info: channel.counterparty_forwarding_info(),
1688 // Ensures that we have actually received the `htlc_minimum_msat` value
1689 // from the counterparty through the `OpenChannel` or `AcceptChannel`
1690 // message (as they are always the first message from the counterparty).
1691 // Else `Channel::get_counterparty_htlc_minimum_msat` could return the
1692 // default `0` value set by `Channel::new_outbound`.
1693 outbound_htlc_minimum_msat: if channel.have_received_message() {
1694 Some(channel.get_counterparty_htlc_minimum_msat()) } else { None },
1695 outbound_htlc_maximum_msat: channel.get_counterparty_htlc_maximum_msat(),
1697 funding_txo: channel.get_funding_txo(),
1698 // Note that accept_channel (or open_channel) is always the first message, so
1699 // `have_received_message` indicates that type negotiation has completed.
1700 channel_type: if channel.have_received_message() { Some(channel.get_channel_type().clone()) } else { None },
1701 short_channel_id: channel.get_short_channel_id(),
1702 inbound_scid_alias: channel.latest_inbound_scid_alias(),
1703 channel_value_satoshis: channel.get_value_satoshis(),
1704 unspendable_punishment_reserve: to_self_reserve_satoshis,
1705 balance_msat: balance.balance_msat,
1706 inbound_capacity_msat: balance.inbound_capacity_msat,
1707 outbound_capacity_msat: balance.outbound_capacity_msat,
1708 next_outbound_htlc_limit_msat: balance.next_outbound_htlc_limit_msat,
1709 user_channel_id: channel.get_user_id(),
1710 confirmations_required: channel.minimum_depth(),
1711 force_close_spend_delay: channel.get_counterparty_selected_contest_delay(),
1712 is_outbound: channel.is_outbound(),
1713 is_funding_locked: channel.is_usable(),
1714 is_usable: channel.is_live(),
1715 is_public: channel.should_announce(),
1716 inbound_htlc_minimum_msat: Some(channel.get_holder_htlc_minimum_msat()),
1717 inbound_htlc_maximum_msat: channel.get_holder_htlc_maximum_msat()
1721 let per_peer_state = self.per_peer_state.read().unwrap();
1722 for chan in res.iter_mut() {
1723 if let Some(peer_state) = per_peer_state.get(&chan.counterparty.node_id) {
1724 chan.counterparty.features = peer_state.lock().unwrap().latest_features.clone();
1730 /// Gets the list of open channels, in random order. See ChannelDetail field documentation for
1731 /// more information.
1732 pub fn list_channels(&self) -> Vec<ChannelDetails> {
1733 self.list_channels_with_filter(|_| true)
1736 /// Gets the list of usable channels, in random order. Useful as an argument to
1737 /// get_route to ensure non-announced channels are used.
1739 /// These are guaranteed to have their [`ChannelDetails::is_usable`] value set to true, see the
1740 /// documentation for [`ChannelDetails::is_usable`] for more info on exactly what the criteria
1742 pub fn list_usable_channels(&self) -> Vec<ChannelDetails> {
1743 // Note we use is_live here instead of usable which leads to somewhat confused
1744 // internal/external nomenclature, but that's ok cause that's probably what the user
1745 // really wanted anyway.
1746 self.list_channels_with_filter(|&(_, ref channel)| channel.is_live())
1749 /// Helper function that issues the channel close events
1750 fn issue_channel_close_events(&self, channel: &Channel<Signer>, closure_reason: ClosureReason) {
1751 let mut pending_events_lock = self.pending_events.lock().unwrap();
1752 match channel.unbroadcasted_funding() {
1753 Some(transaction) => {
1754 pending_events_lock.push(events::Event::DiscardFunding { channel_id: channel.channel_id(), transaction })
1758 pending_events_lock.push(events::Event::ChannelClosed {
1759 channel_id: channel.channel_id(),
1760 user_channel_id: channel.get_user_id(),
1761 reason: closure_reason
1765 fn close_channel_internal(&self, channel_id: &[u8; 32], target_feerate_sats_per_1000_weight: Option<u32>) -> Result<(), APIError> {
1766 let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self.total_consistency_lock, &self.persistence_notifier);
1768 let counterparty_node_id;
1769 let mut failed_htlcs: Vec<(HTLCSource, PaymentHash)>;
1770 let result: Result<(), _> = loop {
1771 let mut channel_state_lock = self.channel_state.lock().unwrap();
1772 let channel_state = &mut *channel_state_lock;
1773 match channel_state.by_id.entry(channel_id.clone()) {
1774 hash_map::Entry::Occupied(mut chan_entry) => {
1775 counterparty_node_id = chan_entry.get().get_counterparty_node_id();
1776 let per_peer_state = self.per_peer_state.read().unwrap();
1777 let (shutdown_msg, monitor_update, htlcs) = match per_peer_state.get(&counterparty_node_id) {
1778 Some(peer_state) => {
1779 let peer_state = peer_state.lock().unwrap();
1780 let their_features = &peer_state.latest_features;
1781 chan_entry.get_mut().get_shutdown(&self.keys_manager, their_features, target_feerate_sats_per_1000_weight)?
1783 None => return Err(APIError::ChannelUnavailable { err: format!("Not connected to node: {}", counterparty_node_id) }),
1785 failed_htlcs = htlcs;
1787 // Update the monitor with the shutdown script if necessary.
1788 if let Some(monitor_update) = monitor_update {
1789 if let Err(e) = self.chain_monitor.update_channel(chan_entry.get().get_funding_txo().unwrap(), monitor_update) {
1790 let (result, is_permanent) =
1791 handle_monitor_err!(self, e, channel_state.short_to_id, chan_entry.get_mut(), RAACommitmentOrder::CommitmentFirst, chan_entry.key(), NO_UPDATE);
1793 remove_channel!(self, channel_state, chan_entry);
1799 channel_state.pending_msg_events.push(events::MessageSendEvent::SendShutdown {
1800 node_id: counterparty_node_id,
1804 if chan_entry.get().is_shutdown() {
1805 let channel = remove_channel!(self, channel_state, chan_entry);
1806 if let Ok(channel_update) = self.get_channel_update_for_broadcast(&channel) {
1807 channel_state.pending_msg_events.push(events::MessageSendEvent::BroadcastChannelUpdate {
1811 self.issue_channel_close_events(&channel, ClosureReason::HolderForceClosed);
1815 hash_map::Entry::Vacant(_) => return Err(APIError::ChannelUnavailable{err: "No such channel".to_owned()})
1819 for htlc_source in failed_htlcs.drain(..) {
1820 self.fail_htlc_backwards_internal(self.channel_state.lock().unwrap(), htlc_source.0, &htlc_source.1, HTLCFailReason::Reason { failure_code: 0x4000 | 8, data: Vec::new() });
1823 let _ = handle_error!(self, result, counterparty_node_id);
1827 /// Begins the process of closing a channel. After this call (plus some timeout), no new HTLCs
1828 /// will be accepted on the given channel, and after additional timeout/the closing of all
1829 /// pending HTLCs, the channel will be closed on chain.
1831 /// * If we are the channel initiator, we will pay between our [`Background`] and
1832 /// [`ChannelConfig::force_close_avoidance_max_fee_satoshis`] plus our [`Normal`] fee
1834 /// * If our counterparty is the channel initiator, we will require a channel closing
1835 /// transaction feerate of at least our [`Background`] feerate or the feerate which
1836 /// would appear on a force-closure transaction, whichever is lower. We will allow our
1837 /// counterparty to pay as much fee as they'd like, however.
1839 /// May generate a SendShutdown message event on success, which should be relayed.
1841 /// [`ChannelConfig::force_close_avoidance_max_fee_satoshis`]: crate::util::config::ChannelConfig::force_close_avoidance_max_fee_satoshis
1842 /// [`Background`]: crate::chain::chaininterface::ConfirmationTarget::Background
1843 /// [`Normal`]: crate::chain::chaininterface::ConfirmationTarget::Normal
1844 pub fn close_channel(&self, channel_id: &[u8; 32]) -> Result<(), APIError> {
1845 self.close_channel_internal(channel_id, None)
1848 /// Begins the process of closing a channel. After this call (plus some timeout), no new HTLCs
1849 /// will be accepted on the given channel, and after additional timeout/the closing of all
1850 /// pending HTLCs, the channel will be closed on chain.
1852 /// `target_feerate_sat_per_1000_weight` has different meanings depending on if we initiated
1853 /// the channel being closed or not:
1854 /// * If we are the channel initiator, we will pay at least this feerate on the closing
1855 /// transaction. The upper-bound is set by
1856 /// [`ChannelConfig::force_close_avoidance_max_fee_satoshis`] plus our [`Normal`] fee
1857 /// estimate (or `target_feerate_sat_per_1000_weight`, if it is greater).
1858 /// * If our counterparty is the channel initiator, we will refuse to accept a channel closure
1859 /// transaction feerate below `target_feerate_sat_per_1000_weight` (or the feerate which
1860 /// will appear on a force-closure transaction, whichever is lower).
1862 /// May generate a SendShutdown message event on success, which should be relayed.
1864 /// [`ChannelConfig::force_close_avoidance_max_fee_satoshis`]: crate::util::config::ChannelConfig::force_close_avoidance_max_fee_satoshis
1865 /// [`Background`]: crate::chain::chaininterface::ConfirmationTarget::Background
1866 /// [`Normal`]: crate::chain::chaininterface::ConfirmationTarget::Normal
1867 pub fn close_channel_with_target_feerate(&self, channel_id: &[u8; 32], target_feerate_sats_per_1000_weight: u32) -> Result<(), APIError> {
1868 self.close_channel_internal(channel_id, Some(target_feerate_sats_per_1000_weight))
1872 fn finish_force_close_channel(&self, shutdown_res: ShutdownResult) {
1873 let (monitor_update_option, mut failed_htlcs) = shutdown_res;
1874 log_debug!(self.logger, "Finishing force-closure of channel with {} HTLCs to fail", failed_htlcs.len());
1875 for htlc_source in failed_htlcs.drain(..) {
1876 self.fail_htlc_backwards_internal(self.channel_state.lock().unwrap(), htlc_source.0, &htlc_source.1, HTLCFailReason::Reason { failure_code: 0x4000 | 8, data: Vec::new() });
1878 if let Some((funding_txo, monitor_update)) = monitor_update_option {
1879 // There isn't anything we can do if we get an update failure - we're already
1880 // force-closing. The monitor update on the required in-memory copy should broadcast
1881 // the latest local state, which is the best we can do anyway. Thus, it is safe to
1882 // ignore the result here.
1883 let _ = self.chain_monitor.update_channel(funding_txo, monitor_update);
1887 /// `peer_node_id` should be set when we receive a message from a peer, but not set when the
1888 /// user closes, which will be re-exposed as the `ChannelClosed` reason.
1889 fn force_close_channel_with_peer(&self, channel_id: &[u8; 32], peer_node_id: Option<&PublicKey>, peer_msg: Option<&String>) -> Result<PublicKey, APIError> {
1891 let mut channel_state_lock = self.channel_state.lock().unwrap();
1892 let channel_state = &mut *channel_state_lock;
1893 if let hash_map::Entry::Occupied(chan) = channel_state.by_id.entry(channel_id.clone()) {
1894 if let Some(node_id) = peer_node_id {
1895 if chan.get().get_counterparty_node_id() != *node_id {
1896 return Err(APIError::ChannelUnavailable{err: "No such channel".to_owned()});
1899 if peer_node_id.is_some() {
1900 if let Some(peer_msg) = peer_msg {
1901 self.issue_channel_close_events(chan.get(),ClosureReason::CounterpartyForceClosed { peer_msg: peer_msg.to_string() });
1904 self.issue_channel_close_events(chan.get(),ClosureReason::HolderForceClosed);
1906 remove_channel!(self, channel_state, chan)
1908 return Err(APIError::ChannelUnavailable{err: "No such channel".to_owned()});
1911 log_error!(self.logger, "Force-closing channel {}", log_bytes!(channel_id[..]));
1912 self.finish_force_close_channel(chan.force_shutdown(true));
1913 if let Ok(update) = self.get_channel_update_for_broadcast(&chan) {
1914 let mut channel_state = self.channel_state.lock().unwrap();
1915 channel_state.pending_msg_events.push(events::MessageSendEvent::BroadcastChannelUpdate {
1920 Ok(chan.get_counterparty_node_id())
1923 /// Force closes a channel, immediately broadcasting the latest local commitment transaction to
1924 /// the chain and rejecting new HTLCs on the given channel. Fails if channel_id is unknown to the manager.
1925 pub fn force_close_channel(&self, channel_id: &[u8; 32]) -> Result<(), APIError> {
1926 let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self.total_consistency_lock, &self.persistence_notifier);
1927 match self.force_close_channel_with_peer(channel_id, None, None) {
1928 Ok(counterparty_node_id) => {
1929 self.channel_state.lock().unwrap().pending_msg_events.push(
1930 events::MessageSendEvent::HandleError {
1931 node_id: counterparty_node_id,
1932 action: msgs::ErrorAction::SendErrorMessage {
1933 msg: msgs::ErrorMessage { channel_id: *channel_id, data: "Channel force-closed".to_owned() }
1943 /// Force close all channels, immediately broadcasting the latest local commitment transaction
1944 /// for each to the chain and rejecting new HTLCs on each.
1945 pub fn force_close_all_channels(&self) {
1946 for chan in self.list_channels() {
1947 let _ = self.force_close_channel(&chan.channel_id);
1951 fn construct_recv_pending_htlc_info(&self, hop_data: msgs::OnionHopData, shared_secret: [u8; 32],
1952 payment_hash: PaymentHash, amt_msat: u64, cltv_expiry: u32, phantom_shared_secret: Option<[u8; 32]>) -> Result<PendingHTLCInfo, ReceiveError>
1954 // final_incorrect_cltv_expiry
1955 if hop_data.outgoing_cltv_value != cltv_expiry {
1956 return Err(ReceiveError {
1957 msg: "Upstream node set CLTV to the wrong value",
1959 err_data: byte_utils::be32_to_array(cltv_expiry).to_vec()
1962 // final_expiry_too_soon
1963 // We have to have some headroom to broadcast on chain if we have the preimage, so make sure
1964 // we have at least HTLC_FAIL_BACK_BUFFER blocks to go.
1965 // Also, ensure that, in the case of an unknown preimage for the received payment hash, our
1966 // payment logic has enough time to fail the HTLC backward before our onchain logic triggers a
1967 // channel closure (see HTLC_FAIL_BACK_BUFFER rationale).
1968 if (hop_data.outgoing_cltv_value as u64) <= self.best_block.read().unwrap().height() as u64 + HTLC_FAIL_BACK_BUFFER as u64 + 1 {
1969 return Err(ReceiveError {
1971 err_data: Vec::new(),
1972 msg: "The final CLTV expiry is too soon to handle",
1975 if hop_data.amt_to_forward > amt_msat {
1976 return Err(ReceiveError {
1978 err_data: byte_utils::be64_to_array(amt_msat).to_vec(),
1979 msg: "Upstream node sent less than we were supposed to receive in payment",
1983 let routing = match hop_data.format {
1984 msgs::OnionHopDataFormat::Legacy { .. } => {
1985 return Err(ReceiveError {
1986 err_code: 0x4000|0x2000|3,
1987 err_data: Vec::new(),
1988 msg: "We require payment_secrets",
1991 msgs::OnionHopDataFormat::NonFinalNode { .. } => {
1992 return Err(ReceiveError {
1993 err_code: 0x4000|22,
1994 err_data: Vec::new(),
1995 msg: "Got non final data with an HMAC of 0",
1998 msgs::OnionHopDataFormat::FinalNode { payment_data, keysend_preimage } => {
1999 if payment_data.is_some() && keysend_preimage.is_some() {
2000 return Err(ReceiveError {
2001 err_code: 0x4000|22,
2002 err_data: Vec::new(),
2003 msg: "We don't support MPP keysend payments",
2005 } else if let Some(data) = payment_data {
2006 PendingHTLCRouting::Receive {
2008 incoming_cltv_expiry: hop_data.outgoing_cltv_value,
2009 phantom_shared_secret,
2011 } else if let Some(payment_preimage) = keysend_preimage {
2012 // We need to check that the sender knows the keysend preimage before processing this
2013 // payment further. Otherwise, an intermediary routing hop forwarding non-keysend-HTLC X
2014 // could discover the final destination of X, by probing the adjacent nodes on the route
2015 // with a keysend payment of identical payment hash to X and observing the processing
2016 // time discrepancies due to a hash collision with X.
2017 let hashed_preimage = PaymentHash(Sha256::hash(&payment_preimage.0).into_inner());
2018 if hashed_preimage != payment_hash {
2019 return Err(ReceiveError {
2020 err_code: 0x4000|22,
2021 err_data: Vec::new(),
2022 msg: "Payment preimage didn't match payment hash",
2026 PendingHTLCRouting::ReceiveKeysend {
2028 incoming_cltv_expiry: hop_data.outgoing_cltv_value,
2031 return Err(ReceiveError {
2032 err_code: 0x4000|0x2000|3,
2033 err_data: Vec::new(),
2034 msg: "We require payment_secrets",
2039 Ok(PendingHTLCInfo {
2042 incoming_shared_secret: shared_secret,
2043 amt_to_forward: amt_msat,
2044 outgoing_cltv_value: hop_data.outgoing_cltv_value,
2048 fn decode_update_add_htlc_onion(&self, msg: &msgs::UpdateAddHTLC) -> (PendingHTLCStatus, MutexGuard<ChannelHolder<Signer>>) {
2049 macro_rules! return_malformed_err {
2050 ($msg: expr, $err_code: expr) => {
2052 log_info!(self.logger, "Failed to accept/forward incoming HTLC: {}", $msg);
2053 return (PendingHTLCStatus::Fail(HTLCFailureMsg::Malformed(msgs::UpdateFailMalformedHTLC {
2054 channel_id: msg.channel_id,
2055 htlc_id: msg.htlc_id,
2056 sha256_of_onion: Sha256::hash(&msg.onion_routing_packet.hop_data).into_inner(),
2057 failure_code: $err_code,
2058 })), self.channel_state.lock().unwrap());
2063 if let Err(_) = msg.onion_routing_packet.public_key {
2064 return_malformed_err!("invalid ephemeral pubkey", 0x8000 | 0x4000 | 6);
2067 let shared_secret = {
2068 let mut arr = [0; 32];
2069 arr.copy_from_slice(&SharedSecret::new(&msg.onion_routing_packet.public_key.unwrap(), &self.our_network_key)[..]);
2073 if msg.onion_routing_packet.version != 0 {
2074 //TODO: Spec doesn't indicate if we should only hash hop_data here (and in other
2075 //sha256_of_onion error data packets), or the entire onion_routing_packet. Either way,
2076 //the hash doesn't really serve any purpose - in the case of hashing all data, the
2077 //receiving node would have to brute force to figure out which version was put in the
2078 //packet by the node that send us the message, in the case of hashing the hop_data, the
2079 //node knows the HMAC matched, so they already know what is there...
2080 return_malformed_err!("Unknown onion packet version", 0x8000 | 0x4000 | 4);
2083 let mut channel_state = None;
2084 macro_rules! return_err {
2085 ($msg: expr, $err_code: expr, $data: expr) => {
2087 log_info!(self.logger, "Failed to accept/forward incoming HTLC: {}", $msg);
2088 if channel_state.is_none() {
2089 channel_state = Some(self.channel_state.lock().unwrap());
2091 return (PendingHTLCStatus::Fail(HTLCFailureMsg::Relay(msgs::UpdateFailHTLC {
2092 channel_id: msg.channel_id,
2093 htlc_id: msg.htlc_id,
2094 reason: onion_utils::build_first_hop_failure_packet(&shared_secret, $err_code, $data),
2095 })), channel_state.unwrap());
2100 let next_hop = match onion_utils::decode_next_hop(shared_secret, &msg.onion_routing_packet.hop_data[..], msg.onion_routing_packet.hmac, msg.payment_hash) {
2102 Err(onion_utils::OnionDecodeErr::Malformed { err_msg, err_code }) => {
2103 return_malformed_err!(err_msg, err_code);
2105 Err(onion_utils::OnionDecodeErr::Relay { err_msg, err_code }) => {
2106 return_err!(err_msg, err_code, &[0; 0]);
2110 let pending_forward_info = match next_hop {
2111 onion_utils::Hop::Receive(next_hop_data) => {
2113 match self.construct_recv_pending_htlc_info(next_hop_data, shared_secret, msg.payment_hash, msg.amount_msat, msg.cltv_expiry, None) {
2115 // Note that we could obviously respond immediately with an update_fulfill_htlc
2116 // message, however that would leak that we are the recipient of this payment, so
2117 // instead we stay symmetric with the forwarding case, only responding (after a
2118 // delay) once they've send us a commitment_signed!
2119 PendingHTLCStatus::Forward(info)
2121 Err(ReceiveError { err_code, err_data, msg }) => return_err!(msg, err_code, &err_data)
2124 onion_utils::Hop::Forward { next_hop_data, next_hop_hmac, new_packet_bytes } => {
2125 let mut new_pubkey = msg.onion_routing_packet.public_key.unwrap();
2127 let blinding_factor = {
2128 let mut sha = Sha256::engine();
2129 sha.input(&new_pubkey.serialize()[..]);
2130 sha.input(&shared_secret);
2131 Sha256::from_engine(sha).into_inner()
2134 let public_key = if let Err(e) = new_pubkey.mul_assign(&self.secp_ctx, &blinding_factor[..]) {
2136 } else { Ok(new_pubkey) };
2138 let outgoing_packet = msgs::OnionPacket {
2141 hop_data: new_packet_bytes,
2142 hmac: next_hop_hmac.clone(),
2145 let short_channel_id = match next_hop_data.format {
2146 msgs::OnionHopDataFormat::Legacy { short_channel_id } => short_channel_id,
2147 msgs::OnionHopDataFormat::NonFinalNode { short_channel_id } => short_channel_id,
2148 msgs::OnionHopDataFormat::FinalNode { .. } => {
2149 return_err!("Final Node OnionHopData provided for us as an intermediary node", 0x4000 | 22, &[0;0]);
2153 PendingHTLCStatus::Forward(PendingHTLCInfo {
2154 routing: PendingHTLCRouting::Forward {
2155 onion_packet: outgoing_packet,
2158 payment_hash: msg.payment_hash.clone(),
2159 incoming_shared_secret: shared_secret,
2160 amt_to_forward: next_hop_data.amt_to_forward,
2161 outgoing_cltv_value: next_hop_data.outgoing_cltv_value,
2166 channel_state = Some(self.channel_state.lock().unwrap());
2167 if let &PendingHTLCStatus::Forward(PendingHTLCInfo { ref routing, ref amt_to_forward, ref outgoing_cltv_value, .. }) = &pending_forward_info {
2168 // If short_channel_id is 0 here, we'll reject the HTLC as there cannot be a channel
2169 // with a short_channel_id of 0. This is important as various things later assume
2170 // short_channel_id is non-0 in any ::Forward.
2171 if let &PendingHTLCRouting::Forward { ref short_channel_id, .. } = routing {
2172 let id_option = channel_state.as_ref().unwrap().short_to_id.get(&short_channel_id).cloned();
2173 if let Some((err, code, chan_update)) = loop {
2174 let forwarding_id_opt = match id_option {
2175 None => { // unknown_next_peer
2176 // Note that this is likely a timing oracle for detecting whether an scid is a
2178 if fake_scid::is_valid_phantom(&self.fake_scid_rand_bytes, *short_channel_id) {
2181 break Some(("Don't have available channel for forwarding as requested.", 0x4000 | 10, None));
2184 Some(id) => Some(id.clone()),
2186 let (chan_update_opt, forwardee_cltv_expiry_delta) = if let Some(forwarding_id) = forwarding_id_opt {
2187 let chan = channel_state.as_mut().unwrap().by_id.get_mut(&forwarding_id).unwrap();
2188 if !chan.should_announce() && !self.default_configuration.accept_forwards_to_priv_channels {
2189 // Note that the behavior here should be identical to the above block - we
2190 // should NOT reveal the existence or non-existence of a private channel if
2191 // we don't allow forwards outbound over them.
2192 break Some(("Refusing to forward to a private channel based on our config.", 0x4000 | 10, None));
2194 if chan.get_channel_type().supports_scid_privacy() && *short_channel_id != chan.outbound_scid_alias() {
2195 // `option_scid_alias` (referred to in LDK as `scid_privacy`) means
2196 // "refuse to forward unless the SCID alias was used", so we pretend
2197 // we don't have the channel here.
2198 break Some(("Refusing to forward over real channel SCID as our counterparty requested.", 0x4000 | 10, None));
2200 let chan_update_opt = self.get_channel_update_for_onion(*short_channel_id, chan).ok();
2202 // Note that we could technically not return an error yet here and just hope
2203 // that the connection is reestablished or monitor updated by the time we get
2204 // around to doing the actual forward, but better to fail early if we can and
2205 // hopefully an attacker trying to path-trace payments cannot make this occur
2206 // on a small/per-node/per-channel scale.
2207 if !chan.is_live() { // channel_disabled
2208 break Some(("Forwarding channel is not in a ready state.", 0x1000 | 20, chan_update_opt));
2210 if *amt_to_forward < chan.get_counterparty_htlc_minimum_msat() { // amount_below_minimum
2211 break Some(("HTLC amount was below the htlc_minimum_msat", 0x1000 | 11, chan_update_opt));
2213 let fee = amt_to_forward.checked_mul(chan.get_fee_proportional_millionths() as u64)
2214 .and_then(|prop_fee| { (prop_fee / 1000000)
2215 .checked_add(chan.get_outbound_forwarding_fee_base_msat() as u64) });
2216 if fee.is_none() || msg.amount_msat < fee.unwrap() || (msg.amount_msat - fee.unwrap()) < *amt_to_forward { // fee_insufficient
2217 break Some(("Prior hop has deviated from specified fees parameters or origin node has obsolete ones", 0x1000 | 12, chan_update_opt));
2219 (chan_update_opt, chan.get_cltv_expiry_delta())
2220 } else { (None, MIN_CLTV_EXPIRY_DELTA) };
2222 if (msg.cltv_expiry as u64) < (*outgoing_cltv_value) as u64 + forwardee_cltv_expiry_delta as u64 { // incorrect_cltv_expiry
2223 break Some(("Forwarding node has tampered with the intended HTLC values or origin node has an obsolete cltv_expiry_delta", 0x1000 | 13, chan_update_opt));
2225 let cur_height = self.best_block.read().unwrap().height() + 1;
2226 // Theoretically, channel counterparty shouldn't send us a HTLC expiring now,
2227 // but we want to be robust wrt to counterparty packet sanitization (see
2228 // HTLC_FAIL_BACK_BUFFER rationale).
2229 if msg.cltv_expiry <= cur_height + HTLC_FAIL_BACK_BUFFER as u32 { // expiry_too_soon
2230 break Some(("CLTV expiry is too close", 0x1000 | 14, chan_update_opt));
2232 if msg.cltv_expiry > cur_height + CLTV_FAR_FAR_AWAY as u32 { // expiry_too_far
2233 break Some(("CLTV expiry is too far in the future", 21, None));
2235 // If the HTLC expires ~now, don't bother trying to forward it to our
2236 // counterparty. They should fail it anyway, but we don't want to bother with
2237 // the round-trips or risk them deciding they definitely want the HTLC and
2238 // force-closing to ensure they get it if we're offline.
2239 // We previously had a much more aggressive check here which tried to ensure
2240 // our counterparty receives an HTLC which has *our* risk threshold met on it,
2241 // but there is no need to do that, and since we're a bit conservative with our
2242 // risk threshold it just results in failing to forward payments.
2243 if (*outgoing_cltv_value) as u64 <= (cur_height + LATENCY_GRACE_PERIOD_BLOCKS) as u64 {
2244 break Some(("Outgoing CLTV value is too soon", 0x1000 | 14, chan_update_opt));
2250 let mut res = VecWriter(Vec::with_capacity(chan_update.serialized_length() + 8 + 2));
2251 if let Some(chan_update) = chan_update {
2252 if code == 0x1000 | 11 || code == 0x1000 | 12 {
2253 msg.amount_msat.write(&mut res).expect("Writes cannot fail");
2255 else if code == 0x1000 | 13 {
2256 msg.cltv_expiry.write(&mut res).expect("Writes cannot fail");
2258 else if code == 0x1000 | 20 {
2259 // TODO: underspecified, follow https://github.com/lightningnetwork/lightning-rfc/issues/791
2260 0u16.write(&mut res).expect("Writes cannot fail");
2262 (chan_update.serialized_length() as u16).write(&mut res).expect("Writes cannot fail");
2263 chan_update.write(&mut res).expect("Writes cannot fail");
2265 return_err!(err, code, &res.0[..]);
2270 (pending_forward_info, channel_state.unwrap())
2273 /// Gets the current channel_update for the given channel. This first checks if the channel is
2274 /// public, and thus should be called whenever the result is going to be passed out in a
2275 /// [`MessageSendEvent::BroadcastChannelUpdate`] event.
2277 /// May be called with channel_state already locked!
2278 fn get_channel_update_for_broadcast(&self, chan: &Channel<Signer>) -> Result<msgs::ChannelUpdate, LightningError> {
2279 if !chan.should_announce() {
2280 return Err(LightningError {
2281 err: "Cannot broadcast a channel_update for a private channel".to_owned(),
2282 action: msgs::ErrorAction::IgnoreError
2285 log_trace!(self.logger, "Attempting to generate broadcast channel update for channel {}", log_bytes!(chan.channel_id()));
2286 self.get_channel_update_for_unicast(chan)
2289 /// Gets the current channel_update for the given channel. This does not check if the channel
2290 /// is public (only returning an Err if the channel does not yet have an assigned short_id),
2291 /// and thus MUST NOT be called unless the recipient of the resulting message has already
2292 /// provided evidence that they know about the existence of the channel.
2293 /// May be called with channel_state already locked!
2294 fn get_channel_update_for_unicast(&self, chan: &Channel<Signer>) -> Result<msgs::ChannelUpdate, LightningError> {
2295 log_trace!(self.logger, "Attempting to generate channel update for channel {}", log_bytes!(chan.channel_id()));
2296 let short_channel_id = match chan.get_short_channel_id() {
2297 None => return Err(LightningError{err: "Channel not yet established".to_owned(), action: msgs::ErrorAction::IgnoreError}),
2301 self.get_channel_update_for_onion(short_channel_id, chan)
2303 fn get_channel_update_for_onion(&self, short_channel_id: u64, chan: &Channel<Signer>) -> Result<msgs::ChannelUpdate, LightningError> {
2304 log_trace!(self.logger, "Generating channel update for channel {}", log_bytes!(chan.channel_id()));
2305 let were_node_one = PublicKey::from_secret_key(&self.secp_ctx, &self.our_network_key).serialize()[..] < chan.get_counterparty_node_id().serialize()[..];
2307 let unsigned = msgs::UnsignedChannelUpdate {
2308 chain_hash: self.genesis_hash,
2310 timestamp: chan.get_update_time_counter(),
2311 flags: (!were_node_one) as u8 | ((!chan.is_live() as u8) << 1),
2312 cltv_expiry_delta: chan.get_cltv_expiry_delta(),
2313 htlc_minimum_msat: chan.get_counterparty_htlc_minimum_msat(),
2314 htlc_maximum_msat: OptionalField::Present(chan.get_announced_htlc_max_msat()),
2315 fee_base_msat: chan.get_outbound_forwarding_fee_base_msat(),
2316 fee_proportional_millionths: chan.get_fee_proportional_millionths(),
2317 excess_data: Vec::new(),
2320 let msg_hash = Sha256dHash::hash(&unsigned.encode()[..]);
2321 let sig = self.secp_ctx.sign(&hash_to_message!(&msg_hash[..]), &self.our_network_key);
2323 Ok(msgs::ChannelUpdate {
2329 // Only public for testing, this should otherwise never be called direcly
2330 pub(crate) fn send_payment_along_path(&self, path: &Vec<RouteHop>, payment_params: &Option<PaymentParameters>, payment_hash: &PaymentHash, payment_secret: &Option<PaymentSecret>, total_value: u64, cur_height: u32, payment_id: PaymentId, keysend_preimage: &Option<PaymentPreimage>) -> Result<(), APIError> {
2331 log_trace!(self.logger, "Attempting to send payment for path with next hop {}", path.first().unwrap().short_channel_id);
2332 let prng_seed = self.keys_manager.get_secure_random_bytes();
2333 let session_priv_bytes = self.keys_manager.get_secure_random_bytes();
2334 let session_priv = SecretKey::from_slice(&session_priv_bytes[..]).expect("RNG is busted");
2336 let onion_keys = onion_utils::construct_onion_keys(&self.secp_ctx, &path, &session_priv)
2337 .map_err(|_| APIError::RouteError{err: "Pubkey along hop was maliciously selected"})?;
2338 let (onion_payloads, htlc_msat, htlc_cltv) = onion_utils::build_onion_payloads(path, total_value, payment_secret, cur_height, keysend_preimage)?;
2339 if onion_utils::route_size_insane(&onion_payloads) {
2340 return Err(APIError::RouteError{err: "Route size too large considering onion data"});
2342 let onion_packet = onion_utils::construct_onion_packet(onion_payloads, onion_keys, prng_seed, payment_hash);
2344 let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self.total_consistency_lock, &self.persistence_notifier);
2346 let err: Result<(), _> = loop {
2347 let mut channel_lock = self.channel_state.lock().unwrap();
2349 let mut pending_outbounds = self.pending_outbound_payments.lock().unwrap();
2350 let payment_entry = pending_outbounds.entry(payment_id);
2351 if let hash_map::Entry::Occupied(payment) = &payment_entry {
2352 if !payment.get().is_retryable() {
2353 return Err(APIError::RouteError {
2354 err: "Payment already completed"
2359 let id = match channel_lock.short_to_id.get(&path.first().unwrap().short_channel_id) {
2360 None => return Err(APIError::ChannelUnavailable{err: "No channel available with first hop!".to_owned()}),
2361 Some(id) => id.clone(),
2364 macro_rules! insert_outbound_payment {
2366 let payment = payment_entry.or_insert_with(|| PendingOutboundPayment::Retryable {
2367 session_privs: HashSet::new(),
2368 pending_amt_msat: 0,
2369 pending_fee_msat: Some(0),
2370 payment_hash: *payment_hash,
2371 payment_secret: *payment_secret,
2372 starting_block_height: self.best_block.read().unwrap().height(),
2373 total_msat: total_value,
2375 assert!(payment.insert(session_priv_bytes, path));
2379 let channel_state = &mut *channel_lock;
2380 if let hash_map::Entry::Occupied(mut chan) = channel_state.by_id.entry(id) {
2382 if chan.get().get_counterparty_node_id() != path.first().unwrap().pubkey {
2383 return Err(APIError::RouteError{err: "Node ID mismatch on first hop!"});
2385 if !chan.get().is_live() {
2386 return Err(APIError::ChannelUnavailable{err: "Peer for first hop currently disconnected/pending monitor update!".to_owned()});
2388 break_chan_entry!(self, chan.get_mut().send_htlc_and_commit(
2389 htlc_msat, payment_hash.clone(), htlc_cltv, HTLCSource::OutboundRoute {
2391 session_priv: session_priv.clone(),
2392 first_hop_htlc_msat: htlc_msat,
2394 payment_secret: payment_secret.clone(),
2395 payment_params: payment_params.clone(),
2396 }, onion_packet, &self.logger),
2397 channel_state, chan)
2399 Some((update_add, commitment_signed, monitor_update)) => {
2400 if let Err(e) = self.chain_monitor.update_channel(chan.get().get_funding_txo().unwrap(), monitor_update) {
2401 maybe_break_monitor_err!(self, e, channel_state, chan, RAACommitmentOrder::CommitmentFirst, false, true);
2402 // Note that MonitorUpdateFailed here indicates (per function docs)
2403 // that we will resend the commitment update once monitor updating
2404 // is restored. Therefore, we must return an error indicating that
2405 // it is unsafe to retry the payment wholesale, which we do in the
2406 // send_payment check for MonitorUpdateFailed, below.
2407 insert_outbound_payment!(); // Only do this after possibly break'ing on Perm failure above.
2408 return Err(APIError::MonitorUpdateFailed);
2410 insert_outbound_payment!();
2412 log_debug!(self.logger, "Sending payment along path resulted in a commitment_signed for channel {}", log_bytes!(chan.get().channel_id()));
2413 channel_state.pending_msg_events.push(events::MessageSendEvent::UpdateHTLCs {
2414 node_id: path.first().unwrap().pubkey,
2415 updates: msgs::CommitmentUpdate {
2416 update_add_htlcs: vec![update_add],
2417 update_fulfill_htlcs: Vec::new(),
2418 update_fail_htlcs: Vec::new(),
2419 update_fail_malformed_htlcs: Vec::new(),
2425 None => { insert_outbound_payment!(); },
2427 } else { unreachable!(); }
2431 match handle_error!(self, err, path.first().unwrap().pubkey) {
2432 Ok(_) => unreachable!(),
2434 Err(APIError::ChannelUnavailable { err: e.err })
2439 /// Sends a payment along a given route.
2441 /// Value parameters are provided via the last hop in route, see documentation for RouteHop
2442 /// fields for more info.
2444 /// Note that if the payment_hash already exists elsewhere (eg you're sending a duplicative
2445 /// payment), we don't do anything to stop you! We always try to ensure that if the provided
2446 /// next hop knows the preimage to payment_hash they can claim an additional amount as
2447 /// specified in the last hop in the route! Thus, you should probably do your own
2448 /// payment_preimage tracking (which you should already be doing as they represent "proof of
2449 /// payment") and prevent double-sends yourself.
2451 /// May generate SendHTLCs message(s) event on success, which should be relayed.
2453 /// Each path may have a different return value, and PaymentSendValue may return a Vec with
2454 /// each entry matching the corresponding-index entry in the route paths, see
2455 /// PaymentSendFailure for more info.
2457 /// In general, a path may raise:
2458 /// * APIError::RouteError when an invalid route or forwarding parameter (cltv_delta, fee,
2459 /// node public key) is specified.
2460 /// * APIError::ChannelUnavailable if the next-hop channel is not available for updates
2461 /// (including due to previous monitor update failure or new permanent monitor update
2463 /// * APIError::MonitorUpdateFailed if a new monitor update failure prevented sending the
2464 /// relevant updates.
2466 /// Note that depending on the type of the PaymentSendFailure the HTLC may have been
2467 /// irrevocably committed to on our end. In such a case, do NOT retry the payment with a
2468 /// different route unless you intend to pay twice!
2470 /// payment_secret is unrelated to payment_hash (or PaymentPreimage) and exists to authenticate
2471 /// the sender to the recipient and prevent payment-probing (deanonymization) attacks. For
2472 /// newer nodes, it will be provided to you in the invoice. If you do not have one, the Route
2473 /// must not contain multiple paths as multi-path payments require a recipient-provided
2475 /// If a payment_secret *is* provided, we assume that the invoice had the payment_secret feature
2476 /// bit set (either as required or as available). If multiple paths are present in the Route,
2477 /// we assume the invoice had the basic_mpp feature set.
2478 pub fn send_payment(&self, route: &Route, payment_hash: PaymentHash, payment_secret: &Option<PaymentSecret>) -> Result<PaymentId, PaymentSendFailure> {
2479 self.send_payment_internal(route, payment_hash, payment_secret, None, None, None)
2482 fn send_payment_internal(&self, route: &Route, payment_hash: PaymentHash, payment_secret: &Option<PaymentSecret>, keysend_preimage: Option<PaymentPreimage>, payment_id: Option<PaymentId>, recv_value_msat: Option<u64>) -> Result<PaymentId, PaymentSendFailure> {
2483 if route.paths.len() < 1 {
2484 return Err(PaymentSendFailure::ParameterError(APIError::RouteError{err: "There must be at least one path to send over"}));
2486 if route.paths.len() > 10 {
2487 // This limit is completely arbitrary - there aren't any real fundamental path-count
2488 // limits. After we support retrying individual paths we should likely bump this, but
2489 // for now more than 10 paths likely carries too much one-path failure.
2490 return Err(PaymentSendFailure::ParameterError(APIError::RouteError{err: "Sending over more than 10 paths is not currently supported"}));
2492 if payment_secret.is_none() && route.paths.len() > 1 {
2493 return Err(PaymentSendFailure::ParameterError(APIError::APIMisuseError{err: "Payment secret is required for multi-path payments".to_string()}));
2495 let mut total_value = 0;
2496 let our_node_id = self.get_our_node_id();
2497 let mut path_errs = Vec::with_capacity(route.paths.len());
2498 let payment_id = if let Some(id) = payment_id { id } else { PaymentId(self.keys_manager.get_secure_random_bytes()) };
2499 'path_check: for path in route.paths.iter() {
2500 if path.len() < 1 || path.len() > 20 {
2501 path_errs.push(Err(APIError::RouteError{err: "Path didn't go anywhere/had bogus size"}));
2502 continue 'path_check;
2504 for (idx, hop) in path.iter().enumerate() {
2505 if idx != path.len() - 1 && hop.pubkey == our_node_id {
2506 path_errs.push(Err(APIError::RouteError{err: "Path went through us but wasn't a simple rebalance loop to us"}));
2507 continue 'path_check;
2510 total_value += path.last().unwrap().fee_msat;
2511 path_errs.push(Ok(()));
2513 if path_errs.iter().any(|e| e.is_err()) {
2514 return Err(PaymentSendFailure::PathParameterError(path_errs));
2516 if let Some(amt_msat) = recv_value_msat {
2517 debug_assert!(amt_msat >= total_value);
2518 total_value = amt_msat;
2521 let cur_height = self.best_block.read().unwrap().height() + 1;
2522 let mut results = Vec::new();
2523 for path in route.paths.iter() {
2524 results.push(self.send_payment_along_path(&path, &route.payment_params, &payment_hash, payment_secret, total_value, cur_height, payment_id, &keysend_preimage));
2526 let mut has_ok = false;
2527 let mut has_err = false;
2528 let mut pending_amt_unsent = 0;
2529 let mut max_unsent_cltv_delta = 0;
2530 for (res, path) in results.iter().zip(route.paths.iter()) {
2531 if res.is_ok() { has_ok = true; }
2532 if res.is_err() { has_err = true; }
2533 if let &Err(APIError::MonitorUpdateFailed) = res {
2534 // MonitorUpdateFailed is inherently unsafe to retry, so we call it a
2538 } else if res.is_err() {
2539 pending_amt_unsent += path.last().unwrap().fee_msat;
2540 max_unsent_cltv_delta = cmp::max(max_unsent_cltv_delta, path.last().unwrap().cltv_expiry_delta);
2543 if has_err && has_ok {
2544 Err(PaymentSendFailure::PartialFailure {
2547 failed_paths_retry: if pending_amt_unsent != 0 {
2548 if let Some(payment_params) = &route.payment_params {
2549 Some(RouteParameters {
2550 payment_params: payment_params.clone(),
2551 final_value_msat: pending_amt_unsent,
2552 final_cltv_expiry_delta: max_unsent_cltv_delta,
2558 // If we failed to send any paths, we shouldn't have inserted the new PaymentId into
2559 // our `pending_outbound_payments` map at all.
2560 debug_assert!(self.pending_outbound_payments.lock().unwrap().get(&payment_id).is_none());
2561 Err(PaymentSendFailure::AllFailedRetrySafe(results.drain(..).map(|r| r.unwrap_err()).collect()))
2567 /// Retries a payment along the given [`Route`].
2569 /// Errors returned are a superset of those returned from [`send_payment`], so see
2570 /// [`send_payment`] documentation for more details on errors. This method will also error if the
2571 /// retry amount puts the payment more than 10% over the payment's total amount, if the payment
2572 /// for the given `payment_id` cannot be found (likely due to timeout or success), or if
2573 /// further retries have been disabled with [`abandon_payment`].
2575 /// [`send_payment`]: [`ChannelManager::send_payment`]
2576 /// [`abandon_payment`]: [`ChannelManager::abandon_payment`]
2577 pub fn retry_payment(&self, route: &Route, payment_id: PaymentId) -> Result<(), PaymentSendFailure> {
2578 const RETRY_OVERFLOW_PERCENTAGE: u64 = 10;
2579 for path in route.paths.iter() {
2580 if path.len() == 0 {
2581 return Err(PaymentSendFailure::ParameterError(APIError::APIMisuseError {
2582 err: "length-0 path in route".to_string()
2587 let (total_msat, payment_hash, payment_secret) = {
2588 let outbounds = self.pending_outbound_payments.lock().unwrap();
2589 if let Some(payment) = outbounds.get(&payment_id) {
2591 PendingOutboundPayment::Retryable {
2592 total_msat, payment_hash, payment_secret, pending_amt_msat, ..
2594 let retry_amt_msat: u64 = route.paths.iter().map(|path| path.last().unwrap().fee_msat).sum();
2595 if retry_amt_msat + *pending_amt_msat > *total_msat * (100 + RETRY_OVERFLOW_PERCENTAGE) / 100 {
2596 return Err(PaymentSendFailure::ParameterError(APIError::APIMisuseError {
2597 err: format!("retry_amt_msat of {} will put pending_amt_msat (currently: {}) more than 10% over total_payment_amt_msat of {}", retry_amt_msat, pending_amt_msat, total_msat).to_string()
2600 (*total_msat, *payment_hash, *payment_secret)
2602 PendingOutboundPayment::Legacy { .. } => {
2603 return Err(PaymentSendFailure::ParameterError(APIError::APIMisuseError {
2604 err: "Unable to retry payments that were initially sent on LDK versions prior to 0.0.102".to_string()
2607 PendingOutboundPayment::Fulfilled { .. } => {
2608 return Err(PaymentSendFailure::ParameterError(APIError::APIMisuseError {
2609 err: "Payment already completed".to_owned()
2612 PendingOutboundPayment::Abandoned { .. } => {
2613 return Err(PaymentSendFailure::ParameterError(APIError::APIMisuseError {
2614 err: "Payment already abandoned (with some HTLCs still pending)".to_owned()
2619 return Err(PaymentSendFailure::ParameterError(APIError::APIMisuseError {
2620 err: format!("Payment with ID {} not found", log_bytes!(payment_id.0)),
2624 return self.send_payment_internal(route, payment_hash, &payment_secret, None, Some(payment_id), Some(total_msat)).map(|_| ())
2627 /// Signals that no further retries for the given payment will occur.
2629 /// After this method returns, any future calls to [`retry_payment`] for the given `payment_id`
2630 /// will fail with [`PaymentSendFailure::ParameterError`]. If no such event has been generated,
2631 /// an [`Event::PaymentFailed`] event will be generated as soon as there are no remaining
2632 /// pending HTLCs for this payment.
2634 /// Note that calling this method does *not* prevent a payment from succeeding. You must still
2635 /// wait until you receive either a [`Event::PaymentFailed`] or [`Event::PaymentSent`] event to
2636 /// determine the ultimate status of a payment.
2638 /// [`retry_payment`]: Self::retry_payment
2639 /// [`Event::PaymentFailed`]: events::Event::PaymentFailed
2640 /// [`Event::PaymentSent`]: events::Event::PaymentSent
2641 pub fn abandon_payment(&self, payment_id: PaymentId) {
2642 let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self.total_consistency_lock, &self.persistence_notifier);
2644 let mut outbounds = self.pending_outbound_payments.lock().unwrap();
2645 if let hash_map::Entry::Occupied(mut payment) = outbounds.entry(payment_id) {
2646 if let Ok(()) = payment.get_mut().mark_abandoned() {
2647 if payment.get().remaining_parts() == 0 {
2648 self.pending_events.lock().unwrap().push(events::Event::PaymentFailed {
2650 payment_hash: payment.get().payment_hash().expect("PendingOutboundPayments::RetriesExceeded always has a payment hash set"),
2658 /// Send a spontaneous payment, which is a payment that does not require the recipient to have
2659 /// generated an invoice. Optionally, you may specify the preimage. If you do choose to specify
2660 /// the preimage, it must be a cryptographically secure random value that no intermediate node
2661 /// would be able to guess -- otherwise, an intermediate node may claim the payment and it will
2662 /// never reach the recipient.
2664 /// See [`send_payment`] documentation for more details on the return value of this function.
2666 /// Similar to regular payments, you MUST NOT reuse a `payment_preimage` value. See
2667 /// [`send_payment`] for more information about the risks of duplicate preimage usage.
2669 /// Note that `route` must have exactly one path.
2671 /// [`send_payment`]: Self::send_payment
2672 pub fn send_spontaneous_payment(&self, route: &Route, payment_preimage: Option<PaymentPreimage>) -> Result<(PaymentHash, PaymentId), PaymentSendFailure> {
2673 let preimage = match payment_preimage {
2675 None => PaymentPreimage(self.keys_manager.get_secure_random_bytes()),
2677 let payment_hash = PaymentHash(Sha256::hash(&preimage.0).into_inner());
2678 match self.send_payment_internal(route, payment_hash, &None, Some(preimage), None, None) {
2679 Ok(payment_id) => Ok((payment_hash, payment_id)),
2684 /// Handles the generation of a funding transaction, optionally (for tests) with a function
2685 /// which checks the correctness of the funding transaction given the associated channel.
2686 fn funding_transaction_generated_intern<FundingOutput: Fn(&Channel<Signer>, &Transaction) -> Result<OutPoint, APIError>>
2687 (&self, temporary_channel_id: &[u8; 32], funding_transaction: Transaction, find_funding_output: FundingOutput) -> Result<(), APIError> {
2689 let (res, chan) = match self.channel_state.lock().unwrap().by_id.remove(temporary_channel_id) {
2691 let funding_txo = find_funding_output(&chan, &funding_transaction)?;
2693 (chan.get_outbound_funding_created(funding_transaction, funding_txo, &self.logger)
2694 .map_err(|e| if let ChannelError::Close(msg) = e {
2695 MsgHandleErrInternal::from_finish_shutdown(msg, chan.channel_id(), chan.get_user_id(), chan.force_shutdown(true), None)
2696 } else { unreachable!(); })
2699 None => { return Err(APIError::ChannelUnavailable { err: "No such channel".to_owned() }) },
2701 match handle_error!(self, res, chan.get_counterparty_node_id()) {
2702 Ok(funding_msg) => {
2705 Err(_) => { return Err(APIError::ChannelUnavailable {
2706 err: "Error deriving keys or signing initial commitment transactions - either our RNG or our counterparty's RNG is broken or the Signer refused to sign".to_owned()
2711 let mut channel_state = self.channel_state.lock().unwrap();
2712 channel_state.pending_msg_events.push(events::MessageSendEvent::SendFundingCreated {
2713 node_id: chan.get_counterparty_node_id(),
2716 match channel_state.by_id.entry(chan.channel_id()) {
2717 hash_map::Entry::Occupied(_) => {
2718 panic!("Generated duplicate funding txid?");
2720 hash_map::Entry::Vacant(e) => {
2728 pub(crate) fn funding_transaction_generated_unchecked(&self, temporary_channel_id: &[u8; 32], funding_transaction: Transaction, output_index: u16) -> Result<(), APIError> {
2729 self.funding_transaction_generated_intern(temporary_channel_id, funding_transaction, |_, tx| {
2730 Ok(OutPoint { txid: tx.txid(), index: output_index })
2734 /// Call this upon creation of a funding transaction for the given channel.
2736 /// Returns an [`APIError::APIMisuseError`] if the funding_transaction spent non-SegWit outputs
2737 /// or if no output was found which matches the parameters in [`Event::FundingGenerationReady`].
2739 /// Returns [`APIError::ChannelUnavailable`] if a funding transaction has already been provided
2740 /// for the channel or if the channel has been closed as indicated by [`Event::ChannelClosed`].
2742 /// May panic if the output found in the funding transaction is duplicative with some other
2743 /// channel (note that this should be trivially prevented by using unique funding transaction
2744 /// keys per-channel).
2746 /// Do NOT broadcast the funding transaction yourself. When we have safely received our
2747 /// counterparty's signature the funding transaction will automatically be broadcast via the
2748 /// [`BroadcasterInterface`] provided when this `ChannelManager` was constructed.
2750 /// Note that this includes RBF or similar transaction replacement strategies - lightning does
2751 /// not currently support replacing a funding transaction on an existing channel. Instead,
2752 /// create a new channel with a conflicting funding transaction.
2754 /// [`Event::FundingGenerationReady`]: crate::util::events::Event::FundingGenerationReady
2755 /// [`Event::ChannelClosed`]: crate::util::events::Event::ChannelClosed
2756 pub fn funding_transaction_generated(&self, temporary_channel_id: &[u8; 32], funding_transaction: Transaction) -> Result<(), APIError> {
2757 let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self.total_consistency_lock, &self.persistence_notifier);
2759 for inp in funding_transaction.input.iter() {
2760 if inp.witness.is_empty() {
2761 return Err(APIError::APIMisuseError {
2762 err: "Funding transaction must be fully signed and spend Segwit outputs".to_owned()
2766 self.funding_transaction_generated_intern(temporary_channel_id, funding_transaction, |chan, tx| {
2767 let mut output_index = None;
2768 let expected_spk = chan.get_funding_redeemscript().to_v0_p2wsh();
2769 for (idx, outp) in tx.output.iter().enumerate() {
2770 if outp.script_pubkey == expected_spk && outp.value == chan.get_value_satoshis() {
2771 if output_index.is_some() {
2772 return Err(APIError::APIMisuseError {
2773 err: "Multiple outputs matched the expected script and value".to_owned()
2776 if idx > u16::max_value() as usize {
2777 return Err(APIError::APIMisuseError {
2778 err: "Transaction had more than 2^16 outputs, which is not supported".to_owned()
2781 output_index = Some(idx as u16);
2784 if output_index.is_none() {
2785 return Err(APIError::APIMisuseError {
2786 err: "No output matched the script_pubkey and value in the FundingGenerationReady event".to_owned()
2789 Ok(OutPoint { txid: tx.txid(), index: output_index.unwrap() })
2794 // Messages of up to 64KB should never end up more than half full with addresses, as that would
2795 // be absurd. We ensure this by checking that at least 500 (our stated public contract on when
2796 // broadcast_node_announcement panics) of the maximum-length addresses would fit in a 64KB
2798 const HALF_MESSAGE_IS_ADDRS: u32 = ::core::u16::MAX as u32 / (NetAddress::MAX_LEN as u32 + 1) / 2;
2801 // ...by failing to compile if the number of addresses that would be half of a message is
2802 // smaller than 500:
2803 const STATIC_ASSERT: u32 = Self::HALF_MESSAGE_IS_ADDRS - 500;
2805 /// Regenerates channel_announcements and generates a signed node_announcement from the given
2806 /// arguments, providing them in corresponding events via
2807 /// [`get_and_clear_pending_msg_events`], if at least one public channel has been confirmed
2808 /// on-chain. This effectively re-broadcasts all channel announcements and sends our node
2809 /// announcement to ensure that the lightning P2P network is aware of the channels we have and
2810 /// our network addresses.
2812 /// `rgb` is a node "color" and `alias` is a printable human-readable string to describe this
2813 /// node to humans. They carry no in-protocol meaning.
2815 /// `addresses` represent the set (possibly empty) of socket addresses on which this node
2816 /// accepts incoming connections. These will be included in the node_announcement, publicly
2817 /// tying these addresses together and to this node. If you wish to preserve user privacy,
2818 /// addresses should likely contain only Tor Onion addresses.
2820 /// Panics if `addresses` is absurdly large (more than 500).
2822 /// [`get_and_clear_pending_msg_events`]: MessageSendEventsProvider::get_and_clear_pending_msg_events
2823 pub fn broadcast_node_announcement(&self, rgb: [u8; 3], alias: [u8; 32], mut addresses: Vec<NetAddress>) {
2824 let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self.total_consistency_lock, &self.persistence_notifier);
2826 if addresses.len() > 500 {
2827 panic!("More than half the message size was taken up by public addresses!");
2830 // While all existing nodes handle unsorted addresses just fine, the spec requires that
2831 // addresses be sorted for future compatibility.
2832 addresses.sort_by_key(|addr| addr.get_id());
2834 let announcement = msgs::UnsignedNodeAnnouncement {
2835 features: NodeFeatures::known(),
2836 timestamp: self.last_node_announcement_serial.fetch_add(1, Ordering::AcqRel) as u32,
2837 node_id: self.get_our_node_id(),
2838 rgb, alias, addresses,
2839 excess_address_data: Vec::new(),
2840 excess_data: Vec::new(),
2842 let msghash = hash_to_message!(&Sha256dHash::hash(&announcement.encode()[..])[..]);
2843 let node_announce_sig = sign(&self.secp_ctx, &msghash, &self.our_network_key);
2845 let mut channel_state_lock = self.channel_state.lock().unwrap();
2846 let channel_state = &mut *channel_state_lock;
2848 let mut announced_chans = false;
2849 for (_, chan) in channel_state.by_id.iter() {
2850 if let Some(msg) = chan.get_signed_channel_announcement(self.get_our_node_id(), self.genesis_hash.clone(), self.best_block.read().unwrap().height()) {
2851 channel_state.pending_msg_events.push(events::MessageSendEvent::BroadcastChannelAnnouncement {
2853 update_msg: match self.get_channel_update_for_broadcast(chan) {
2858 announced_chans = true;
2860 // If the channel is not public or has not yet reached funding_locked, check the
2861 // next channel. If we don't yet have any public channels, we'll skip the broadcast
2862 // below as peers may not accept it without channels on chain first.
2866 if announced_chans {
2867 channel_state.pending_msg_events.push(events::MessageSendEvent::BroadcastNodeAnnouncement {
2868 msg: msgs::NodeAnnouncement {
2869 signature: node_announce_sig,
2870 contents: announcement
2876 /// Processes HTLCs which are pending waiting on random forward delay.
2878 /// Should only really ever be called in response to a PendingHTLCsForwardable event.
2879 /// Will likely generate further events.
2880 pub fn process_pending_htlc_forwards(&self) {
2881 let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self.total_consistency_lock, &self.persistence_notifier);
2883 let mut new_events = Vec::new();
2884 let mut failed_forwards = Vec::new();
2885 let mut phantom_receives: Vec<(u64, OutPoint, Vec<(PendingHTLCInfo, u64)>)> = Vec::new();
2886 let mut handle_errors = Vec::new();
2888 let mut channel_state_lock = self.channel_state.lock().unwrap();
2889 let channel_state = &mut *channel_state_lock;
2891 for (short_chan_id, mut pending_forwards) in channel_state.forward_htlcs.drain() {
2892 if short_chan_id != 0 {
2893 let forward_chan_id = match channel_state.short_to_id.get(&short_chan_id) {
2894 Some(chan_id) => chan_id.clone(),
2896 for forward_info in pending_forwards.drain(..) {
2897 match forward_info {
2898 HTLCForwardInfo::AddHTLC { prev_short_channel_id, prev_htlc_id, forward_info: PendingHTLCInfo {
2899 routing, incoming_shared_secret, payment_hash, amt_to_forward, outgoing_cltv_value },
2900 prev_funding_outpoint } => {
2901 macro_rules! fail_forward {
2902 ($msg: expr, $err_code: expr, $err_data: expr, $phantom_ss: expr) => {
2904 log_info!(self.logger, "Failed to accept/forward incoming HTLC: {}", $msg);
2905 let htlc_source = HTLCSource::PreviousHopData(HTLCPreviousHopData {
2906 short_channel_id: prev_short_channel_id,
2907 outpoint: prev_funding_outpoint,
2908 htlc_id: prev_htlc_id,
2909 incoming_packet_shared_secret: incoming_shared_secret,
2910 phantom_shared_secret: $phantom_ss,
2912 failed_forwards.push((htlc_source, payment_hash,
2913 HTLCFailReason::Reason { failure_code: $err_code, data: $err_data }
2919 if let PendingHTLCRouting::Forward { onion_packet, .. } = routing {
2920 let phantom_secret_res = self.keys_manager.get_node_secret(Recipient::PhantomNode);
2921 if phantom_secret_res.is_ok() && fake_scid::is_valid_phantom(&self.fake_scid_rand_bytes, short_chan_id) {
2922 let phantom_shared_secret = {
2923 let mut arr = [0; 32];
2924 arr.copy_from_slice(&SharedSecret::new(&onion_packet.public_key.unwrap(), &phantom_secret_res.unwrap())[..]);
2927 let next_hop = match onion_utils::decode_next_hop(phantom_shared_secret, &onion_packet.hop_data, onion_packet.hmac, payment_hash) {
2929 Err(onion_utils::OnionDecodeErr::Malformed { err_msg, err_code }) => {
2930 let sha256_of_onion = Sha256::hash(&onion_packet.hop_data).into_inner();
2931 // In this scenario, the phantom would have sent us an
2932 // `update_fail_malformed_htlc`, meaning here we encrypt the error as
2933 // if it came from us (the second-to-last hop) but contains the sha256
2935 fail_forward!(err_msg, err_code, sha256_of_onion.to_vec(), None);
2937 Err(onion_utils::OnionDecodeErr::Relay { err_msg, err_code }) => {
2938 fail_forward!(err_msg, err_code, Vec::new(), Some(phantom_shared_secret));
2942 onion_utils::Hop::Receive(hop_data) => {
2943 match self.construct_recv_pending_htlc_info(hop_data, incoming_shared_secret, payment_hash, amt_to_forward, outgoing_cltv_value, Some(phantom_shared_secret)) {
2944 Ok(info) => phantom_receives.push((prev_short_channel_id, prev_funding_outpoint, vec![(info, prev_htlc_id)])),
2945 Err(ReceiveError { err_code, err_data, msg }) => fail_forward!(msg, err_code, err_data, Some(phantom_shared_secret))
2951 fail_forward!(format!("Unknown short channel id {} for forward HTLC", short_chan_id), 0x4000 | 10, Vec::new(), None);
2954 fail_forward!(format!("Unknown short channel id {} for forward HTLC", short_chan_id), 0x4000 | 10, Vec::new(), None);
2957 HTLCForwardInfo::FailHTLC { .. } => {
2958 // Channel went away before we could fail it. This implies
2959 // the channel is now on chain and our counterparty is
2960 // trying to broadcast the HTLC-Timeout, but that's their
2961 // problem, not ours.
2968 if let hash_map::Entry::Occupied(mut chan) = channel_state.by_id.entry(forward_chan_id) {
2969 let mut add_htlc_msgs = Vec::new();
2970 let mut fail_htlc_msgs = Vec::new();
2971 for forward_info in pending_forwards.drain(..) {
2972 match forward_info {
2973 HTLCForwardInfo::AddHTLC { prev_short_channel_id, prev_htlc_id, forward_info: PendingHTLCInfo {
2974 routing: PendingHTLCRouting::Forward {
2976 }, incoming_shared_secret, payment_hash, amt_to_forward, outgoing_cltv_value },
2977 prev_funding_outpoint } => {
2978 log_trace!(self.logger, "Adding HTLC from short id {} with payment_hash {} to channel with short id {} after delay", prev_short_channel_id, log_bytes!(payment_hash.0), short_chan_id);
2979 let htlc_source = HTLCSource::PreviousHopData(HTLCPreviousHopData {
2980 short_channel_id: prev_short_channel_id,
2981 outpoint: prev_funding_outpoint,
2982 htlc_id: prev_htlc_id,
2983 incoming_packet_shared_secret: incoming_shared_secret,
2984 // Phantom payments are only PendingHTLCRouting::Receive.
2985 phantom_shared_secret: None,
2987 match chan.get_mut().send_htlc(amt_to_forward, payment_hash, outgoing_cltv_value, htlc_source.clone(), onion_packet, &self.logger) {
2989 if let ChannelError::Ignore(msg) = e {
2990 log_trace!(self.logger, "Failed to forward HTLC with payment_hash {}: {}", log_bytes!(payment_hash.0), msg);
2992 panic!("Stated return value requirements in send_htlc() were not met");
2994 let (failure_code, data) = self.get_htlc_temp_fail_err_and_data(0x1000|7, short_chan_id, chan.get());
2995 failed_forwards.push((htlc_source, payment_hash,
2996 HTLCFailReason::Reason { failure_code, data }
3002 Some(msg) => { add_htlc_msgs.push(msg); },
3004 // Nothing to do here...we're waiting on a remote
3005 // revoke_and_ack before we can add anymore HTLCs. The Channel
3006 // will automatically handle building the update_add_htlc and
3007 // commitment_signed messages when we can.
3008 // TODO: Do some kind of timer to set the channel as !is_live()
3009 // as we don't really want others relying on us relaying through
3010 // this channel currently :/.
3016 HTLCForwardInfo::AddHTLC { .. } => {
3017 panic!("short_channel_id != 0 should imply any pending_forward entries are of type Forward");
3019 HTLCForwardInfo::FailHTLC { htlc_id, err_packet } => {
3020 log_trace!(self.logger, "Failing HTLC back to channel with short id {} (backward HTLC ID {}) after delay", short_chan_id, htlc_id);
3021 match chan.get_mut().get_update_fail_htlc(htlc_id, err_packet, &self.logger) {
3023 if let ChannelError::Ignore(msg) = e {
3024 log_trace!(self.logger, "Failed to fail HTLC with ID {} backwards to short_id {}: {}", htlc_id, short_chan_id, msg);
3026 panic!("Stated return value requirements in get_update_fail_htlc() were not met");
3028 // fail-backs are best-effort, we probably already have one
3029 // pending, and if not that's OK, if not, the channel is on
3030 // the chain and sending the HTLC-Timeout is their problem.
3033 Ok(Some(msg)) => { fail_htlc_msgs.push(msg); },
3035 // Nothing to do here...we're waiting on a remote
3036 // revoke_and_ack before we can update the commitment
3037 // transaction. The Channel will automatically handle
3038 // building the update_fail_htlc and commitment_signed
3039 // messages when we can.
3040 // We don't need any kind of timer here as they should fail
3041 // the channel onto the chain if they can't get our
3042 // update_fail_htlc in time, it's not our problem.
3049 if !add_htlc_msgs.is_empty() || !fail_htlc_msgs.is_empty() {
3050 let (commitment_msg, monitor_update) = match chan.get_mut().send_commitment(&self.logger) {
3053 // We surely failed send_commitment due to bad keys, in that case
3054 // close channel and then send error message to peer.
3055 let counterparty_node_id = chan.get().get_counterparty_node_id();
3056 let err: Result<(), _> = match e {
3057 ChannelError::Ignore(_) | ChannelError::Warn(_) => {
3058 panic!("Stated return value requirements in send_commitment() were not met");
3060 ChannelError::Close(msg) => {
3061 log_trace!(self.logger, "Closing channel {} due to Close-required error: {}", log_bytes!(chan.key()[..]), msg);
3062 let mut channel = remove_channel!(self, channel_state, chan);
3063 // ChannelClosed event is generated by handle_error for us.
3064 Err(MsgHandleErrInternal::from_finish_shutdown(msg, channel.channel_id(), channel.get_user_id(), channel.force_shutdown(true), self.get_channel_update_for_broadcast(&channel).ok()))
3066 ChannelError::CloseDelayBroadcast(_) => { panic!("Wait is only generated on receipt of channel_reestablish, which is handled by try_chan_entry, we don't bother to support it here"); }
3068 handle_errors.push((counterparty_node_id, err));
3072 if let Err(e) = self.chain_monitor.update_channel(chan.get().get_funding_txo().unwrap(), monitor_update) {
3073 handle_errors.push((chan.get().get_counterparty_node_id(), handle_monitor_err!(self, e, channel_state, chan, RAACommitmentOrder::CommitmentFirst, false, true)));
3076 log_debug!(self.logger, "Forwarding HTLCs resulted in a commitment update with {} HTLCs added and {} HTLCs failed for channel {}",
3077 add_htlc_msgs.len(), fail_htlc_msgs.len(), log_bytes!(chan.get().channel_id()));
3078 channel_state.pending_msg_events.push(events::MessageSendEvent::UpdateHTLCs {
3079 node_id: chan.get().get_counterparty_node_id(),
3080 updates: msgs::CommitmentUpdate {
3081 update_add_htlcs: add_htlc_msgs,
3082 update_fulfill_htlcs: Vec::new(),
3083 update_fail_htlcs: fail_htlc_msgs,
3084 update_fail_malformed_htlcs: Vec::new(),
3086 commitment_signed: commitment_msg,
3094 for forward_info in pending_forwards.drain(..) {
3095 match forward_info {
3096 HTLCForwardInfo::AddHTLC { prev_short_channel_id, prev_htlc_id, forward_info: PendingHTLCInfo {
3097 routing, incoming_shared_secret, payment_hash, amt_to_forward, .. },
3098 prev_funding_outpoint } => {
3099 let (cltv_expiry, onion_payload, phantom_shared_secret) = match routing {
3100 PendingHTLCRouting::Receive { payment_data, incoming_cltv_expiry, phantom_shared_secret } =>
3101 (incoming_cltv_expiry, OnionPayload::Invoice(payment_data), phantom_shared_secret),
3102 PendingHTLCRouting::ReceiveKeysend { payment_preimage, incoming_cltv_expiry } =>
3103 (incoming_cltv_expiry, OnionPayload::Spontaneous(payment_preimage), None),
3105 panic!("short_channel_id == 0 should imply any pending_forward entries are of type Receive");
3108 let claimable_htlc = ClaimableHTLC {
3109 prev_hop: HTLCPreviousHopData {
3110 short_channel_id: prev_short_channel_id,
3111 outpoint: prev_funding_outpoint,
3112 htlc_id: prev_htlc_id,
3113 incoming_packet_shared_secret: incoming_shared_secret,
3114 phantom_shared_secret,
3116 value: amt_to_forward,
3122 macro_rules! fail_htlc {
3124 let mut htlc_msat_height_data = byte_utils::be64_to_array($htlc.value).to_vec();
3125 htlc_msat_height_data.extend_from_slice(
3126 &byte_utils::be32_to_array(self.best_block.read().unwrap().height()),
3128 failed_forwards.push((HTLCSource::PreviousHopData(HTLCPreviousHopData {
3129 short_channel_id: $htlc.prev_hop.short_channel_id,
3130 outpoint: prev_funding_outpoint,
3131 htlc_id: $htlc.prev_hop.htlc_id,
3132 incoming_packet_shared_secret: $htlc.prev_hop.incoming_packet_shared_secret,
3133 phantom_shared_secret,
3135 HTLCFailReason::Reason { failure_code: 0x4000 | 15, data: htlc_msat_height_data }
3140 macro_rules! check_total_value {
3141 ($payment_data_total_msat: expr, $payment_secret: expr, $payment_preimage: expr) => {{
3142 let mut payment_received_generated = false;
3143 let htlcs = channel_state.claimable_htlcs.entry(payment_hash)
3144 .or_insert(Vec::new());
3145 if htlcs.len() == 1 {
3146 if let OnionPayload::Spontaneous(_) = htlcs[0].onion_payload {
3147 log_trace!(self.logger, "Failing new HTLC with payment_hash {} as we already had an existing keysend HTLC with the same payment hash", log_bytes!(payment_hash.0));
3148 fail_htlc!(claimable_htlc);
3152 let mut total_value = claimable_htlc.value;
3153 for htlc in htlcs.iter() {
3154 total_value += htlc.value;
3155 match &htlc.onion_payload {
3156 OnionPayload::Invoice(htlc_payment_data) => {
3157 if htlc_payment_data.total_msat != $payment_data_total_msat {
3158 log_trace!(self.logger, "Failing HTLCs with payment_hash {} as the HTLCs had inconsistent total values (eg {} and {})",
3159 log_bytes!(payment_hash.0), $payment_data_total_msat, htlc_payment_data.total_msat);
3160 total_value = msgs::MAX_VALUE_MSAT;
3162 if total_value >= msgs::MAX_VALUE_MSAT { break; }
3164 _ => unreachable!(),
3167 if total_value >= msgs::MAX_VALUE_MSAT || total_value > $payment_data_total_msat {
3168 log_trace!(self.logger, "Failing HTLCs with payment_hash {} as the total value {} ran over expected value {} (or HTLCs were inconsistent)",
3169 log_bytes!(payment_hash.0), total_value, $payment_data_total_msat);
3170 fail_htlc!(claimable_htlc);
3171 } else if total_value == $payment_data_total_msat {
3172 htlcs.push(claimable_htlc);
3173 new_events.push(events::Event::PaymentReceived {
3175 purpose: events::PaymentPurpose::InvoicePayment {
3176 payment_preimage: $payment_preimage,
3177 payment_secret: $payment_secret,
3181 payment_received_generated = true;
3183 // Nothing to do - we haven't reached the total
3184 // payment value yet, wait until we receive more
3186 htlcs.push(claimable_htlc);
3188 payment_received_generated
3192 // Check that the payment hash and secret are known. Note that we
3193 // MUST take care to handle the "unknown payment hash" and
3194 // "incorrect payment secret" cases here identically or we'd expose
3195 // that we are the ultimate recipient of the given payment hash.
3196 // Further, we must not expose whether we have any other HTLCs
3197 // associated with the same payment_hash pending or not.
3198 let mut payment_secrets = self.pending_inbound_payments.lock().unwrap();
3199 match payment_secrets.entry(payment_hash) {
3200 hash_map::Entry::Vacant(_) => {
3201 match claimable_htlc.onion_payload {
3202 OnionPayload::Invoice(ref payment_data) => {
3203 let payment_preimage = match inbound_payment::verify(payment_hash, payment_data.clone(), self.highest_seen_timestamp.load(Ordering::Acquire) as u64, &self.inbound_payment_key, &self.logger) {
3204 Ok(payment_preimage) => payment_preimage,
3206 fail_htlc!(claimable_htlc);
3210 let payment_data_total_msat = payment_data.total_msat;
3211 let payment_secret = payment_data.payment_secret.clone();
3212 check_total_value!(payment_data_total_msat, payment_secret, payment_preimage);
3214 OnionPayload::Spontaneous(preimage) => {
3215 match channel_state.claimable_htlcs.entry(payment_hash) {
3216 hash_map::Entry::Vacant(e) => {
3217 e.insert(vec![claimable_htlc]);
3218 new_events.push(events::Event::PaymentReceived {
3220 amt: amt_to_forward,
3221 purpose: events::PaymentPurpose::SpontaneousPayment(preimage),
3224 hash_map::Entry::Occupied(_) => {
3225 log_trace!(self.logger, "Failing new keysend HTLC with payment_hash {} for a duplicative payment hash", log_bytes!(payment_hash.0));
3226 fail_htlc!(claimable_htlc);
3232 hash_map::Entry::Occupied(inbound_payment) => {
3234 if let OnionPayload::Invoice(ref data) = claimable_htlc.onion_payload {
3237 log_trace!(self.logger, "Failing new keysend HTLC with payment_hash {} because we already have an inbound payment with the same payment hash", log_bytes!(payment_hash.0));
3238 fail_htlc!(claimable_htlc);
3241 if inbound_payment.get().payment_secret != payment_data.payment_secret {
3242 log_trace!(self.logger, "Failing new HTLC with payment_hash {} as it didn't match our expected payment secret.", log_bytes!(payment_hash.0));
3243 fail_htlc!(claimable_htlc);
3244 } else if inbound_payment.get().min_value_msat.is_some() && payment_data.total_msat < inbound_payment.get().min_value_msat.unwrap() {
3245 log_trace!(self.logger, "Failing new HTLC with payment_hash {} as it didn't match our minimum value (had {}, needed {}).",
3246 log_bytes!(payment_hash.0), payment_data.total_msat, inbound_payment.get().min_value_msat.unwrap());
3247 fail_htlc!(claimable_htlc);
3249 let payment_received_generated = check_total_value!(payment_data.total_msat, payment_data.payment_secret, inbound_payment.get().payment_preimage);
3250 if payment_received_generated {
3251 inbound_payment.remove_entry();
3257 HTLCForwardInfo::FailHTLC { .. } => {
3258 panic!("Got pending fail of our own HTLC");
3266 for (htlc_source, payment_hash, failure_reason) in failed_forwards.drain(..) {
3267 self.fail_htlc_backwards_internal(self.channel_state.lock().unwrap(), htlc_source, &payment_hash, failure_reason);
3269 self.forward_htlcs(&mut phantom_receives);
3271 for (counterparty_node_id, err) in handle_errors.drain(..) {
3272 let _ = handle_error!(self, err, counterparty_node_id);
3275 if new_events.is_empty() { return }
3276 let mut events = self.pending_events.lock().unwrap();
3277 events.append(&mut new_events);
3280 /// Free the background events, generally called from timer_tick_occurred.
3282 /// Exposed for testing to allow us to process events quickly without generating accidental
3283 /// BroadcastChannelUpdate events in timer_tick_occurred.
3285 /// Expects the caller to have a total_consistency_lock read lock.
3286 fn process_background_events(&self) -> bool {
3287 let mut background_events = Vec::new();
3288 mem::swap(&mut *self.pending_background_events.lock().unwrap(), &mut background_events);
3289 if background_events.is_empty() {
3293 for event in background_events.drain(..) {
3295 BackgroundEvent::ClosingMonitorUpdate((funding_txo, update)) => {
3296 // The channel has already been closed, so no use bothering to care about the
3297 // monitor updating completing.
3298 let _ = self.chain_monitor.update_channel(funding_txo, update);
3305 #[cfg(any(test, feature = "_test_utils"))]
3306 /// Process background events, for functional testing
3307 pub fn test_process_background_events(&self) {
3308 self.process_background_events();
3311 fn update_channel_fee(&self, short_to_id: &mut HashMap<u64, [u8; 32]>, pending_msg_events: &mut Vec<events::MessageSendEvent>, chan_id: &[u8; 32], chan: &mut Channel<Signer>, new_feerate: u32) -> (bool, NotifyOption, Result<(), MsgHandleErrInternal>) {
3312 if !chan.is_outbound() { return (true, NotifyOption::SkipPersist, Ok(())); }
3313 // If the feerate has decreased by less than half, don't bother
3314 if new_feerate <= chan.get_feerate() && new_feerate * 2 > chan.get_feerate() {
3315 log_trace!(self.logger, "Channel {} does not qualify for a feerate change from {} to {}.",
3316 log_bytes!(chan_id[..]), chan.get_feerate(), new_feerate);
3317 return (true, NotifyOption::SkipPersist, Ok(()));
3319 if !chan.is_live() {
3320 log_trace!(self.logger, "Channel {} does not qualify for a feerate change from {} to {} as it cannot currently be updated (probably the peer is disconnected).",
3321 log_bytes!(chan_id[..]), chan.get_feerate(), new_feerate);
3322 return (true, NotifyOption::SkipPersist, Ok(()));
3324 log_trace!(self.logger, "Channel {} qualifies for a feerate change from {} to {}.",
3325 log_bytes!(chan_id[..]), chan.get_feerate(), new_feerate);
3327 let mut retain_channel = true;
3328 let res = match chan.send_update_fee_and_commit(new_feerate, &self.logger) {
3331 let (drop, res) = convert_chan_err!(self, e, short_to_id, chan, chan_id);
3332 if drop { retain_channel = false; }
3336 let ret_err = match res {
3337 Ok(Some((update_fee, commitment_signed, monitor_update))) => {
3338 if let Err(e) = self.chain_monitor.update_channel(chan.get_funding_txo().unwrap(), monitor_update) {
3339 let (res, drop) = handle_monitor_err!(self, e, short_to_id, chan, RAACommitmentOrder::CommitmentFirst, chan_id, COMMITMENT_UPDATE_ONLY);
3340 if drop { retain_channel = false; }
3343 pending_msg_events.push(events::MessageSendEvent::UpdateHTLCs {
3344 node_id: chan.get_counterparty_node_id(),
3345 updates: msgs::CommitmentUpdate {
3346 update_add_htlcs: Vec::new(),
3347 update_fulfill_htlcs: Vec::new(),
3348 update_fail_htlcs: Vec::new(),
3349 update_fail_malformed_htlcs: Vec::new(),
3350 update_fee: Some(update_fee),
3360 (retain_channel, NotifyOption::DoPersist, ret_err)
3364 /// In chanmon_consistency we want to sometimes do the channel fee updates done in
3365 /// timer_tick_occurred, but we can't generate the disabled channel updates as it considers
3366 /// these a fuzz failure (as they usually indicate a channel force-close, which is exactly what
3367 /// it wants to detect). Thus, we have a variant exposed here for its benefit.
3368 pub fn maybe_update_chan_fees(&self) {
3369 PersistenceNotifierGuard::optionally_notify(&self.total_consistency_lock, &self.persistence_notifier, || {
3370 let mut should_persist = NotifyOption::SkipPersist;
3372 let new_feerate = self.fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Normal);
3374 let mut handle_errors = Vec::new();
3376 let mut channel_state_lock = self.channel_state.lock().unwrap();
3377 let channel_state = &mut *channel_state_lock;
3378 let pending_msg_events = &mut channel_state.pending_msg_events;
3379 let short_to_id = &mut channel_state.short_to_id;
3380 channel_state.by_id.retain(|chan_id, chan| {
3381 let (retain_channel, chan_needs_persist, err) = self.update_channel_fee(short_to_id, pending_msg_events, chan_id, chan, new_feerate);
3382 if chan_needs_persist == NotifyOption::DoPersist { should_persist = NotifyOption::DoPersist; }
3384 handle_errors.push(err);
3394 /// Performs actions which should happen on startup and roughly once per minute thereafter.
3396 /// This currently includes:
3397 /// * Increasing or decreasing the on-chain feerate estimates for our outbound channels,
3398 /// * Broadcasting `ChannelUpdate` messages if we've been disconnected from our peer for more
3399 /// than a minute, informing the network that they should no longer attempt to route over
3402 /// Note that this may cause reentrancy through `chain::Watch::update_channel` calls or feerate
3403 /// estimate fetches.
3404 pub fn timer_tick_occurred(&self) {
3405 PersistenceNotifierGuard::optionally_notify(&self.total_consistency_lock, &self.persistence_notifier, || {
3406 let mut should_persist = NotifyOption::SkipPersist;
3407 if self.process_background_events() { should_persist = NotifyOption::DoPersist; }
3409 let new_feerate = self.fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Normal);
3411 let mut handle_errors = Vec::new();
3412 let mut timed_out_mpp_htlcs = Vec::new();
3414 let mut channel_state_lock = self.channel_state.lock().unwrap();
3415 let channel_state = &mut *channel_state_lock;
3416 let pending_msg_events = &mut channel_state.pending_msg_events;
3417 let short_to_id = &mut channel_state.short_to_id;
3418 channel_state.by_id.retain(|chan_id, chan| {
3419 let counterparty_node_id = chan.get_counterparty_node_id();
3420 let (retain_channel, chan_needs_persist, err) = self.update_channel_fee(short_to_id, pending_msg_events, chan_id, chan, new_feerate);
3421 if chan_needs_persist == NotifyOption::DoPersist { should_persist = NotifyOption::DoPersist; }
3423 handle_errors.push((err, counterparty_node_id));
3425 if !retain_channel { return false; }
3427 if let Err(e) = chan.timer_check_closing_negotiation_progress() {
3428 let (needs_close, err) = convert_chan_err!(self, e, short_to_id, chan, chan_id);
3429 handle_errors.push((Err(err), chan.get_counterparty_node_id()));
3430 if needs_close { return false; }
3433 match chan.channel_update_status() {
3434 ChannelUpdateStatus::Enabled if !chan.is_live() => chan.set_channel_update_status(ChannelUpdateStatus::DisabledStaged),
3435 ChannelUpdateStatus::Disabled if chan.is_live() => chan.set_channel_update_status(ChannelUpdateStatus::EnabledStaged),
3436 ChannelUpdateStatus::DisabledStaged if chan.is_live() => chan.set_channel_update_status(ChannelUpdateStatus::Enabled),
3437 ChannelUpdateStatus::EnabledStaged if !chan.is_live() => chan.set_channel_update_status(ChannelUpdateStatus::Disabled),
3438 ChannelUpdateStatus::DisabledStaged if !chan.is_live() => {
3439 if let Ok(update) = self.get_channel_update_for_broadcast(&chan) {
3440 pending_msg_events.push(events::MessageSendEvent::BroadcastChannelUpdate {
3444 should_persist = NotifyOption::DoPersist;
3445 chan.set_channel_update_status(ChannelUpdateStatus::Disabled);
3447 ChannelUpdateStatus::EnabledStaged if chan.is_live() => {
3448 if let Ok(update) = self.get_channel_update_for_broadcast(&chan) {
3449 pending_msg_events.push(events::MessageSendEvent::BroadcastChannelUpdate {
3453 should_persist = NotifyOption::DoPersist;
3454 chan.set_channel_update_status(ChannelUpdateStatus::Enabled);
3462 channel_state.claimable_htlcs.retain(|payment_hash, htlcs| {
3463 if htlcs.is_empty() {
3464 // This should be unreachable
3465 debug_assert!(false);
3468 if let OnionPayload::Invoice(ref final_hop_data) = htlcs[0].onion_payload {
3469 // Check if we've received all the parts we need for an MPP (the value of the parts adds to total_msat).
3470 // In this case we're not going to handle any timeouts of the parts here.
3471 if final_hop_data.total_msat == htlcs.iter().fold(0, |total, htlc| total + htlc.value) {
3473 } else if htlcs.into_iter().any(|htlc| {
3474 htlc.timer_ticks += 1;
3475 return htlc.timer_ticks >= MPP_TIMEOUT_TICKS
3477 timed_out_mpp_htlcs.extend(htlcs.into_iter().map(|htlc| (htlc.prev_hop.clone(), payment_hash.clone())));
3485 for htlc_source in timed_out_mpp_htlcs.drain(..) {
3486 self.fail_htlc_backwards_internal(self.channel_state.lock().unwrap(), HTLCSource::PreviousHopData(htlc_source.0), &htlc_source.1, HTLCFailReason::Reason { failure_code: 23, data: Vec::new() });
3489 for (err, counterparty_node_id) in handle_errors.drain(..) {
3490 let _ = handle_error!(self, err, counterparty_node_id);
3496 /// Indicates that the preimage for payment_hash is unknown or the received amount is incorrect
3497 /// after a PaymentReceived event, failing the HTLC back to its origin and freeing resources
3498 /// along the path (including in our own channel on which we received it).
3499 /// Returns false if no payment was found to fail backwards, true if the process of failing the
3500 /// HTLC backwards has been started.
3501 pub fn fail_htlc_backwards(&self, payment_hash: &PaymentHash) -> bool {
3502 let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self.total_consistency_lock, &self.persistence_notifier);
3504 let mut channel_state = Some(self.channel_state.lock().unwrap());
3505 let removed_source = channel_state.as_mut().unwrap().claimable_htlcs.remove(payment_hash);
3506 if let Some(mut sources) = removed_source {
3507 for htlc in sources.drain(..) {
3508 if channel_state.is_none() { channel_state = Some(self.channel_state.lock().unwrap()); }
3509 let mut htlc_msat_height_data = byte_utils::be64_to_array(htlc.value).to_vec();
3510 htlc_msat_height_data.extend_from_slice(&byte_utils::be32_to_array(
3511 self.best_block.read().unwrap().height()));
3512 self.fail_htlc_backwards_internal(channel_state.take().unwrap(),
3513 HTLCSource::PreviousHopData(htlc.prev_hop), payment_hash,
3514 HTLCFailReason::Reason { failure_code: 0x4000 | 15, data: htlc_msat_height_data });
3520 /// Gets an HTLC onion failure code and error data for an `UPDATE` error, given the error code
3521 /// that we want to return and a channel.
3523 /// This is for failures on the channel on which the HTLC was *received*, not failures
3525 fn get_htlc_inbound_temp_fail_err_and_data(&self, desired_err_code: u16, chan: &Channel<Signer>) -> (u16, Vec<u8>) {
3526 // We can't be sure what SCID was used when relaying inbound towards us, so we have to
3527 // guess somewhat. If its a public channel, we figure best to just use the real SCID (as
3528 // we're not leaking that we have a channel with the counterparty), otherwise we try to use
3529 // an inbound SCID alias before the real SCID.
3530 let scid_pref = if chan.should_announce() {
3531 chan.get_short_channel_id().or(chan.latest_inbound_scid_alias())
3533 chan.latest_inbound_scid_alias().or(chan.get_short_channel_id())
3535 if let Some(scid) = scid_pref {
3536 self.get_htlc_temp_fail_err_and_data(desired_err_code, scid, chan)
3538 (0x4000|10, Vec::new())
3543 /// Gets an HTLC onion failure code and error data for an `UPDATE` error, given the error code
3544 /// that we want to return and a channel.
3545 fn get_htlc_temp_fail_err_and_data(&self, desired_err_code: u16, scid: u64, chan: &Channel<Signer>) -> (u16, Vec<u8>) {
3546 debug_assert_eq!(desired_err_code & 0x1000, 0x1000);
3547 if let Ok(upd) = self.get_channel_update_for_onion(scid, chan) {
3548 let mut enc = VecWriter(Vec::with_capacity(upd.serialized_length() + 4));
3549 if desired_err_code == 0x1000 | 20 {
3550 // TODO: underspecified, follow https://github.com/lightning/bolts/issues/791
3551 0u16.write(&mut enc).expect("Writes cannot fail");
3553 (upd.serialized_length() as u16).write(&mut enc).expect("Writes cannot fail");
3554 upd.write(&mut enc).expect("Writes cannot fail");
3555 (desired_err_code, enc.0)
3557 // If we fail to get a unicast channel_update, it implies we don't yet have an SCID,
3558 // which means we really shouldn't have gotten a payment to be forwarded over this
3559 // channel yet, or if we did it's from a route hint. Either way, returning an error of
3560 // PERM|no_such_channel should be fine.
3561 (0x4000|10, Vec::new())
3565 // Fail a list of HTLCs that were just freed from the holding cell. The HTLCs need to be
3566 // failed backwards or, if they were one of our outgoing HTLCs, then their failure needs to
3567 // be surfaced to the user.
3568 fn fail_holding_cell_htlcs(&self, mut htlcs_to_fail: Vec<(HTLCSource, PaymentHash)>, channel_id: [u8; 32]) {
3569 for (htlc_src, payment_hash) in htlcs_to_fail.drain(..) {
3571 HTLCSource::PreviousHopData(HTLCPreviousHopData { .. }) => {
3572 let (failure_code, onion_failure_data) =
3573 match self.channel_state.lock().unwrap().by_id.entry(channel_id) {
3574 hash_map::Entry::Occupied(chan_entry) => {
3575 self.get_htlc_inbound_temp_fail_err_and_data(0x1000|7, &chan_entry.get())
3577 hash_map::Entry::Vacant(_) => (0x4000|10, Vec::new())
3579 let channel_state = self.channel_state.lock().unwrap();
3580 self.fail_htlc_backwards_internal(channel_state,
3581 htlc_src, &payment_hash, HTLCFailReason::Reason { failure_code, data: onion_failure_data});
3583 HTLCSource::OutboundRoute { session_priv, payment_id, path, payment_params, .. } => {
3584 let mut session_priv_bytes = [0; 32];
3585 session_priv_bytes.copy_from_slice(&session_priv[..]);
3586 let mut outbounds = self.pending_outbound_payments.lock().unwrap();
3587 if let hash_map::Entry::Occupied(mut payment) = outbounds.entry(payment_id) {
3588 if payment.get_mut().remove(&session_priv_bytes, Some(&path)) && !payment.get().is_fulfilled() {
3589 let retry = if let Some(payment_params_data) = payment_params {
3590 let path_last_hop = path.last().expect("Outbound payments must have had a valid path");
3591 Some(RouteParameters {
3592 payment_params: payment_params_data,
3593 final_value_msat: path_last_hop.fee_msat,
3594 final_cltv_expiry_delta: path_last_hop.cltv_expiry_delta,
3597 let mut pending_events = self.pending_events.lock().unwrap();
3598 pending_events.push(events::Event::PaymentPathFailed {
3599 payment_id: Some(payment_id),
3601 rejected_by_dest: false,
3602 network_update: None,
3603 all_paths_failed: payment.get().remaining_parts() == 0,
3605 short_channel_id: None,
3612 if payment.get().abandoned() && payment.get().remaining_parts() == 0 {
3613 pending_events.push(events::Event::PaymentFailed {
3615 payment_hash: payment.get().payment_hash().expect("PendingOutboundPayments::RetriesExceeded always has a payment hash set"),
3621 log_trace!(self.logger, "Received duplicative fail for HTLC with payment_hash {}", log_bytes!(payment_hash.0));
3628 /// Fails an HTLC backwards to the sender of it to us.
3629 /// Note that while we take a channel_state lock as input, we do *not* assume consistency here.
3630 /// There are several callsites that do stupid things like loop over a list of payment_hashes
3631 /// to fail and take the channel_state lock for each iteration (as we take ownership and may
3632 /// drop it). In other words, no assumptions are made that entries in claimable_htlcs point to
3633 /// still-available channels.
3634 fn fail_htlc_backwards_internal(&self, mut channel_state_lock: MutexGuard<ChannelHolder<Signer>>, source: HTLCSource, payment_hash: &PaymentHash, onion_error: HTLCFailReason) {
3635 //TODO: There is a timing attack here where if a node fails an HTLC back to us they can
3636 //identify whether we sent it or not based on the (I presume) very different runtime
3637 //between the branches here. We should make this async and move it into the forward HTLCs
3640 // Note that we MUST NOT end up calling methods on self.chain_monitor here - we're called
3641 // from block_connected which may run during initialization prior to the chain_monitor
3642 // being fully configured. See the docs for `ChannelManagerReadArgs` for more.
3644 HTLCSource::OutboundRoute { ref path, session_priv, payment_id, ref payment_params, .. } => {
3645 let mut session_priv_bytes = [0; 32];
3646 session_priv_bytes.copy_from_slice(&session_priv[..]);
3647 let mut outbounds = self.pending_outbound_payments.lock().unwrap();
3648 let mut all_paths_failed = false;
3649 let mut full_failure_ev = None;
3650 if let hash_map::Entry::Occupied(mut payment) = outbounds.entry(payment_id) {
3651 if !payment.get_mut().remove(&session_priv_bytes, Some(&path)) {
3652 log_trace!(self.logger, "Received duplicative fail for HTLC with payment_hash {}", log_bytes!(payment_hash.0));
3655 if payment.get().is_fulfilled() {
3656 log_trace!(self.logger, "Received failure of HTLC with payment_hash {} after payment completion", log_bytes!(payment_hash.0));
3659 if payment.get().remaining_parts() == 0 {
3660 all_paths_failed = true;
3661 if payment.get().abandoned() {
3662 full_failure_ev = Some(events::Event::PaymentFailed {
3664 payment_hash: payment.get().payment_hash().expect("PendingOutboundPayments::RetriesExceeded always has a payment hash set"),
3670 log_trace!(self.logger, "Received duplicative fail for HTLC with payment_hash {}", log_bytes!(payment_hash.0));
3673 mem::drop(channel_state_lock);
3674 let retry = if let Some(payment_params_data) = payment_params {
3675 let path_last_hop = path.last().expect("Outbound payments must have had a valid path");
3676 Some(RouteParameters {
3677 payment_params: payment_params_data.clone(),
3678 final_value_msat: path_last_hop.fee_msat,
3679 final_cltv_expiry_delta: path_last_hop.cltv_expiry_delta,
3682 log_trace!(self.logger, "Failing outbound payment HTLC with payment_hash {}", log_bytes!(payment_hash.0));
3684 let path_failure = match &onion_error {
3685 &HTLCFailReason::LightningError { ref err } => {
3687 let (network_update, short_channel_id, payment_retryable, onion_error_code, onion_error_data) = onion_utils::process_onion_failure(&self.secp_ctx, &self.logger, &source, err.data.clone());
3689 let (network_update, short_channel_id, payment_retryable, _, _) = onion_utils::process_onion_failure(&self.secp_ctx, &self.logger, &source, err.data.clone());
3690 // TODO: If we decided to blame ourselves (or one of our channels) in
3691 // process_onion_failure we should close that channel as it implies our
3692 // next-hop is needlessly blaming us!
3693 events::Event::PaymentPathFailed {
3694 payment_id: Some(payment_id),
3695 payment_hash: payment_hash.clone(),
3696 rejected_by_dest: !payment_retryable,
3703 error_code: onion_error_code,
3705 error_data: onion_error_data
3708 &HTLCFailReason::Reason {
3714 // we get a fail_malformed_htlc from the first hop
3715 // TODO: We'd like to generate a NetworkUpdate for temporary
3716 // failures here, but that would be insufficient as get_route
3717 // generally ignores its view of our own channels as we provide them via
3719 // TODO: For non-temporary failures, we really should be closing the
3720 // channel here as we apparently can't relay through them anyway.
3721 events::Event::PaymentPathFailed {
3722 payment_id: Some(payment_id),
3723 payment_hash: payment_hash.clone(),
3724 rejected_by_dest: path.len() == 1,
3725 network_update: None,
3728 short_channel_id: Some(path.first().unwrap().short_channel_id),
3731 error_code: Some(*failure_code),
3733 error_data: Some(data.clone()),
3737 let mut pending_events = self.pending_events.lock().unwrap();
3738 pending_events.push(path_failure);
3739 if let Some(ev) = full_failure_ev { pending_events.push(ev); }
3741 HTLCSource::PreviousHopData(HTLCPreviousHopData { short_channel_id, htlc_id, incoming_packet_shared_secret, phantom_shared_secret, .. }) => {
3742 let err_packet = match onion_error {
3743 HTLCFailReason::Reason { failure_code, data } => {
3744 log_trace!(self.logger, "Failing HTLC with payment_hash {} backwards from us with code {}", log_bytes!(payment_hash.0), failure_code);
3745 if let Some(phantom_ss) = phantom_shared_secret {
3746 let phantom_packet = onion_utils::build_failure_packet(&phantom_ss, failure_code, &data[..]).encode();
3747 let encrypted_phantom_packet = onion_utils::encrypt_failure_packet(&phantom_ss, &phantom_packet);
3748 onion_utils::encrypt_failure_packet(&incoming_packet_shared_secret, &encrypted_phantom_packet.data[..])
3750 let packet = onion_utils::build_failure_packet(&incoming_packet_shared_secret, failure_code, &data[..]).encode();
3751 onion_utils::encrypt_failure_packet(&incoming_packet_shared_secret, &packet)
3754 HTLCFailReason::LightningError { err } => {
3755 log_trace!(self.logger, "Failing HTLC with payment_hash {} backwards with pre-built LightningError", log_bytes!(payment_hash.0));
3756 onion_utils::encrypt_failure_packet(&incoming_packet_shared_secret, &err.data)
3760 let mut forward_event = None;
3761 if channel_state_lock.forward_htlcs.is_empty() {
3762 forward_event = Some(Duration::from_millis(MIN_HTLC_RELAY_HOLDING_CELL_MILLIS));
3764 match channel_state_lock.forward_htlcs.entry(short_channel_id) {
3765 hash_map::Entry::Occupied(mut entry) => {
3766 entry.get_mut().push(HTLCForwardInfo::FailHTLC { htlc_id, err_packet });
3768 hash_map::Entry::Vacant(entry) => {
3769 entry.insert(vec!(HTLCForwardInfo::FailHTLC { htlc_id, err_packet }));
3772 mem::drop(channel_state_lock);
3773 if let Some(time) = forward_event {
3774 let mut pending_events = self.pending_events.lock().unwrap();
3775 pending_events.push(events::Event::PendingHTLCsForwardable {
3776 time_forwardable: time
3783 /// Provides a payment preimage in response to [`Event::PaymentReceived`], generating any
3784 /// [`MessageSendEvent`]s needed to claim the payment.
3786 /// Note that if you did not set an `amount_msat` when calling [`create_inbound_payment`] or
3787 /// [`create_inbound_payment_for_hash`] you must check that the amount in the `PaymentReceived`
3788 /// event matches your expectation. If you fail to do so and call this method, you may provide
3789 /// the sender "proof-of-payment" when they did not fulfill the full expected payment.
3791 /// Returns whether any HTLCs were claimed, and thus if any new [`MessageSendEvent`]s are now
3792 /// pending for processing via [`get_and_clear_pending_msg_events`].
3794 /// [`Event::PaymentReceived`]: crate::util::events::Event::PaymentReceived
3795 /// [`create_inbound_payment`]: Self::create_inbound_payment
3796 /// [`create_inbound_payment_for_hash`]: Self::create_inbound_payment_for_hash
3797 /// [`get_and_clear_pending_msg_events`]: MessageSendEventsProvider::get_and_clear_pending_msg_events
3798 pub fn claim_funds(&self, payment_preimage: PaymentPreimage) -> bool {
3799 let payment_hash = PaymentHash(Sha256::hash(&payment_preimage.0).into_inner());
3801 let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self.total_consistency_lock, &self.persistence_notifier);
3803 let mut channel_state = Some(self.channel_state.lock().unwrap());
3804 let removed_source = channel_state.as_mut().unwrap().claimable_htlcs.remove(&payment_hash);
3805 if let Some(mut sources) = removed_source {
3806 assert!(!sources.is_empty());
3808 // If we are claiming an MPP payment, we have to take special care to ensure that each
3809 // channel exists before claiming all of the payments (inside one lock).
3810 // Note that channel existance is sufficient as we should always get a monitor update
3811 // which will take care of the real HTLC claim enforcement.
3813 // If we find an HTLC which we would need to claim but for which we do not have a
3814 // channel, we will fail all parts of the MPP payment. While we could wait and see if
3815 // the sender retries the already-failed path(s), it should be a pretty rare case where
3816 // we got all the HTLCs and then a channel closed while we were waiting for the user to
3817 // provide the preimage, so worrying too much about the optimal handling isn't worth
3819 let mut valid_mpp = true;
3820 for htlc in sources.iter() {
3821 if let None = channel_state.as_ref().unwrap().short_to_id.get(&htlc.prev_hop.short_channel_id) {
3827 let mut errs = Vec::new();
3828 let mut claimed_any_htlcs = false;
3829 for htlc in sources.drain(..) {
3831 if channel_state.is_none() { channel_state = Some(self.channel_state.lock().unwrap()); }
3832 let mut htlc_msat_height_data = byte_utils::be64_to_array(htlc.value).to_vec();
3833 htlc_msat_height_data.extend_from_slice(&byte_utils::be32_to_array(
3834 self.best_block.read().unwrap().height()));
3835 self.fail_htlc_backwards_internal(channel_state.take().unwrap(),
3836 HTLCSource::PreviousHopData(htlc.prev_hop), &payment_hash,
3837 HTLCFailReason::Reason { failure_code: 0x4000|15, data: htlc_msat_height_data });
3839 match self.claim_funds_from_hop(channel_state.as_mut().unwrap(), htlc.prev_hop, payment_preimage) {
3840 ClaimFundsFromHop::MonitorUpdateFail(pk, err, _) => {
3841 if let msgs::ErrorAction::IgnoreError = err.err.action {
3842 // We got a temporary failure updating monitor, but will claim the
3843 // HTLC when the monitor updating is restored (or on chain).
3844 log_error!(self.logger, "Temporary failure claiming HTLC, treating as success: {}", err.err.err);
3845 claimed_any_htlcs = true;
3846 } else { errs.push((pk, err)); }
3848 ClaimFundsFromHop::PrevHopForceClosed => unreachable!("We already checked for channel existence, we can't fail here!"),
3849 ClaimFundsFromHop::DuplicateClaim => {
3850 // While we should never get here in most cases, if we do, it likely
3851 // indicates that the HTLC was timed out some time ago and is no longer
3852 // available to be claimed. Thus, it does not make sense to set
3853 // `claimed_any_htlcs`.
3855 ClaimFundsFromHop::Success(_) => claimed_any_htlcs = true,
3860 // Now that we've done the entire above loop in one lock, we can handle any errors
3861 // which were generated.
3862 channel_state.take();
3864 for (counterparty_node_id, err) in errs.drain(..) {
3865 let res: Result<(), _> = Err(err);
3866 let _ = handle_error!(self, res, counterparty_node_id);
3873 fn claim_funds_from_hop(&self, channel_state_lock: &mut MutexGuard<ChannelHolder<Signer>>, prev_hop: HTLCPreviousHopData, payment_preimage: PaymentPreimage) -> ClaimFundsFromHop {
3874 //TODO: Delay the claimed_funds relaying just like we do outbound relay!
3875 let channel_state = &mut **channel_state_lock;
3876 let chan_id = match channel_state.short_to_id.get(&prev_hop.short_channel_id) {
3877 Some(chan_id) => chan_id.clone(),
3879 return ClaimFundsFromHop::PrevHopForceClosed
3883 if let hash_map::Entry::Occupied(mut chan) = channel_state.by_id.entry(chan_id) {
3884 match chan.get_mut().get_update_fulfill_htlc_and_commit(prev_hop.htlc_id, payment_preimage, &self.logger) {
3885 Ok(msgs_monitor_option) => {
3886 if let UpdateFulfillCommitFetch::NewClaim { msgs, htlc_value_msat, monitor_update } = msgs_monitor_option {
3887 if let Err(e) = self.chain_monitor.update_channel(chan.get().get_funding_txo().unwrap(), monitor_update) {
3888 log_given_level!(self.logger, if e == ChannelMonitorUpdateErr::PermanentFailure { Level::Error } else { Level::Debug },
3889 "Failed to update channel monitor with preimage {:?}: {:?}",
3890 payment_preimage, e);
3891 return ClaimFundsFromHop::MonitorUpdateFail(
3892 chan.get().get_counterparty_node_id(),
3893 handle_monitor_err!(self, e, channel_state, chan, RAACommitmentOrder::CommitmentFirst, false, msgs.is_some()).unwrap_err(),
3894 Some(htlc_value_msat)
3897 if let Some((msg, commitment_signed)) = msgs {
3898 log_debug!(self.logger, "Claiming funds for HTLC with preimage {} resulted in a commitment_signed for channel {}",
3899 log_bytes!(payment_preimage.0), log_bytes!(chan.get().channel_id()));
3900 channel_state.pending_msg_events.push(events::MessageSendEvent::UpdateHTLCs {
3901 node_id: chan.get().get_counterparty_node_id(),
3902 updates: msgs::CommitmentUpdate {
3903 update_add_htlcs: Vec::new(),
3904 update_fulfill_htlcs: vec![msg],
3905 update_fail_htlcs: Vec::new(),
3906 update_fail_malformed_htlcs: Vec::new(),
3912 return ClaimFundsFromHop::Success(htlc_value_msat);
3914 return ClaimFundsFromHop::DuplicateClaim;
3917 Err((e, monitor_update)) => {
3918 if let Err(e) = self.chain_monitor.update_channel(chan.get().get_funding_txo().unwrap(), monitor_update) {
3919 log_given_level!(self.logger, if e == ChannelMonitorUpdateErr::PermanentFailure { Level::Error } else { Level::Info },
3920 "Failed to update channel monitor with preimage {:?} immediately prior to force-close: {:?}",
3921 payment_preimage, e);
3923 let counterparty_node_id = chan.get().get_counterparty_node_id();
3924 let (drop, res) = convert_chan_err!(self, e, channel_state.short_to_id, chan.get_mut(), &chan_id);
3926 chan.remove_entry();
3928 return ClaimFundsFromHop::MonitorUpdateFail(counterparty_node_id, res, None);
3931 } else { unreachable!(); }
3934 fn finalize_claims(&self, mut sources: Vec<HTLCSource>) {
3935 let mut outbounds = self.pending_outbound_payments.lock().unwrap();
3936 let mut pending_events = self.pending_events.lock().unwrap();
3937 for source in sources.drain(..) {
3938 if let HTLCSource::OutboundRoute { session_priv, payment_id, path, .. } = source {
3939 let mut session_priv_bytes = [0; 32];
3940 session_priv_bytes.copy_from_slice(&session_priv[..]);
3941 if let hash_map::Entry::Occupied(mut payment) = outbounds.entry(payment_id) {
3942 assert!(payment.get().is_fulfilled());
3943 if payment.get_mut().remove(&session_priv_bytes, None) {
3944 pending_events.push(
3945 events::Event::PaymentPathSuccessful {
3947 payment_hash: payment.get().payment_hash(),
3952 if payment.get().remaining_parts() == 0 {
3960 fn claim_funds_internal(&self, mut channel_state_lock: MutexGuard<ChannelHolder<Signer>>, source: HTLCSource, payment_preimage: PaymentPreimage, forwarded_htlc_value_msat: Option<u64>, from_onchain: bool) {
3962 HTLCSource::OutboundRoute { session_priv, payment_id, path, .. } => {
3963 mem::drop(channel_state_lock);
3964 let mut session_priv_bytes = [0; 32];
3965 session_priv_bytes.copy_from_slice(&session_priv[..]);
3966 let mut outbounds = self.pending_outbound_payments.lock().unwrap();
3967 if let hash_map::Entry::Occupied(mut payment) = outbounds.entry(payment_id) {
3968 let mut pending_events = self.pending_events.lock().unwrap();
3969 if !payment.get().is_fulfilled() {
3970 let payment_hash = PaymentHash(Sha256::hash(&payment_preimage.0).into_inner());
3971 let fee_paid_msat = payment.get().get_pending_fee_msat();
3972 pending_events.push(
3973 events::Event::PaymentSent {
3974 payment_id: Some(payment_id),
3980 payment.get_mut().mark_fulfilled();
3984 // We currently immediately remove HTLCs which were fulfilled on-chain.
3985 // This could potentially lead to removing a pending payment too early,
3986 // with a reorg of one block causing us to re-add the fulfilled payment on
3988 // TODO: We should have a second monitor event that informs us of payments
3989 // irrevocably fulfilled.
3990 if payment.get_mut().remove(&session_priv_bytes, Some(&path)) {
3991 let payment_hash = Some(PaymentHash(Sha256::hash(&payment_preimage.0).into_inner()));
3992 pending_events.push(
3993 events::Event::PaymentPathSuccessful {
4001 if payment.get().remaining_parts() == 0 {
4006 log_trace!(self.logger, "Received duplicative fulfill for HTLC with payment_preimage {}", log_bytes!(payment_preimage.0));
4009 HTLCSource::PreviousHopData(hop_data) => {
4010 let prev_outpoint = hop_data.outpoint;
4011 let res = self.claim_funds_from_hop(&mut channel_state_lock, hop_data, payment_preimage);
4012 let claimed_htlc = if let ClaimFundsFromHop::DuplicateClaim = res { false } else { true };
4013 let htlc_claim_value_msat = match res {
4014 ClaimFundsFromHop::MonitorUpdateFail(_, _, amt_opt) => amt_opt,
4015 ClaimFundsFromHop::Success(amt) => Some(amt),
4018 if let ClaimFundsFromHop::PrevHopForceClosed = res {
4019 let preimage_update = ChannelMonitorUpdate {
4020 update_id: CLOSED_CHANNEL_UPDATE_ID,
4021 updates: vec![ChannelMonitorUpdateStep::PaymentPreimage {
4022 payment_preimage: payment_preimage.clone(),
4025 // We update the ChannelMonitor on the backward link, after
4026 // receiving an offchain preimage event from the forward link (the
4027 // event being update_fulfill_htlc).
4028 if let Err(e) = self.chain_monitor.update_channel(prev_outpoint, preimage_update) {
4029 log_error!(self.logger, "Critical error: failed to update channel monitor with preimage {:?}: {:?}",
4030 payment_preimage, e);
4032 // Note that we do *not* set `claimed_htlc` to false here. In fact, this
4033 // totally could be a duplicate claim, but we have no way of knowing
4034 // without interrogating the `ChannelMonitor` we've provided the above
4035 // update to. Instead, we simply document in `PaymentForwarded` that this
4038 mem::drop(channel_state_lock);
4039 if let ClaimFundsFromHop::MonitorUpdateFail(pk, err, _) = res {
4040 let result: Result<(), _> = Err(err);
4041 let _ = handle_error!(self, result, pk);
4045 if let Some(forwarded_htlc_value) = forwarded_htlc_value_msat {
4046 let fee_earned_msat = if let Some(claimed_htlc_value) = htlc_claim_value_msat {
4047 Some(claimed_htlc_value - forwarded_htlc_value)
4050 let mut pending_events = self.pending_events.lock().unwrap();
4052 let source_channel_id = Some(prev_outpoint.to_channel_id());
4053 pending_events.push(events::Event::PaymentForwarded {
4056 claim_from_onchain_tx: from_onchain,
4064 /// Gets the node_id held by this ChannelManager
4065 pub fn get_our_node_id(&self) -> PublicKey {
4066 self.our_network_pubkey.clone()
4069 fn channel_monitor_updated(&self, funding_txo: &OutPoint, highest_applied_update_id: u64) {
4070 let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self.total_consistency_lock, &self.persistence_notifier);
4072 let chan_restoration_res;
4073 let (mut pending_failures, finalized_claims) = {
4074 let mut channel_lock = self.channel_state.lock().unwrap();
4075 let channel_state = &mut *channel_lock;
4076 let mut channel = match channel_state.by_id.entry(funding_txo.to_channel_id()) {
4077 hash_map::Entry::Occupied(chan) => chan,
4078 hash_map::Entry::Vacant(_) => return,
4080 if !channel.get().is_awaiting_monitor_update() || channel.get().get_latest_monitor_update_id() != highest_applied_update_id {
4084 let updates = channel.get_mut().monitor_updating_restored(&self.logger, self.get_our_node_id(), self.genesis_hash, self.best_block.read().unwrap().height());
4085 let channel_update = if updates.funding_locked.is_some() && channel.get().is_usable() {
4086 // We only send a channel_update in the case where we are just now sending a
4087 // funding_locked and the channel is in a usable state. We may re-send a
4088 // channel_update later through the announcement_signatures process for public
4089 // channels, but there's no reason not to just inform our counterparty of our fees
4091 if let Ok(msg) = self.get_channel_update_for_unicast(channel.get()) {
4092 Some(events::MessageSendEvent::SendChannelUpdate {
4093 node_id: channel.get().get_counterparty_node_id(),
4098 chan_restoration_res = handle_chan_restoration_locked!(self, channel_lock, channel_state, channel, updates.raa, updates.commitment_update, updates.order, None, updates.accepted_htlcs, updates.funding_broadcastable, updates.funding_locked, updates.announcement_sigs);
4099 if let Some(upd) = channel_update {
4100 channel_state.pending_msg_events.push(upd);
4102 (updates.failed_htlcs, updates.finalized_claimed_htlcs)
4104 post_handle_chan_restoration!(self, chan_restoration_res);
4105 self.finalize_claims(finalized_claims);
4106 for failure in pending_failures.drain(..) {
4107 self.fail_htlc_backwards_internal(self.channel_state.lock().unwrap(), failure.0, &failure.1, failure.2);
4111 /// Called to accept a request to open a channel after [`Event::OpenChannelRequest`] has been
4114 /// The `temporary_channel_id` parameter indicates which inbound channel should be accepted.
4116 /// For inbound channels, the `user_channel_id` parameter will be provided back in
4117 /// [`Event::ChannelClosed::user_channel_id`] to allow tracking of which events correspond
4118 /// with which `accept_inbound_channel` call.
4120 /// [`Event::OpenChannelRequest`]: events::Event::OpenChannelRequest
4121 /// [`Event::ChannelClosed::user_channel_id`]: events::Event::ChannelClosed::user_channel_id
4122 pub fn accept_inbound_channel(&self, temporary_channel_id: &[u8; 32], user_channel_id: u64) -> Result<(), APIError> {
4123 let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self.total_consistency_lock, &self.persistence_notifier);
4125 let mut channel_state_lock = self.channel_state.lock().unwrap();
4126 let channel_state = &mut *channel_state_lock;
4127 match channel_state.by_id.entry(temporary_channel_id.clone()) {
4128 hash_map::Entry::Occupied(mut channel) => {
4129 if !channel.get().inbound_is_awaiting_accept() {
4130 return Err(APIError::APIMisuseError { err: "The channel isn't currently awaiting to be accepted.".to_owned() });
4132 channel_state.pending_msg_events.push(events::MessageSendEvent::SendAcceptChannel {
4133 node_id: channel.get().get_counterparty_node_id(),
4134 msg: channel.get_mut().accept_inbound_channel(user_channel_id),
4137 hash_map::Entry::Vacant(_) => {
4138 return Err(APIError::ChannelUnavailable { err: "Can't accept a channel that doesn't exist".to_owned() });
4144 fn internal_open_channel(&self, counterparty_node_id: &PublicKey, their_features: InitFeatures, msg: &msgs::OpenChannel) -> Result<(), MsgHandleErrInternal> {
4145 if msg.chain_hash != self.genesis_hash {
4146 return Err(MsgHandleErrInternal::send_err_msg_no_close("Unknown genesis block hash".to_owned(), msg.temporary_channel_id.clone()));
4149 if !self.default_configuration.accept_inbound_channels {
4150 return Err(MsgHandleErrInternal::send_err_msg_no_close("No inbound channels accepted".to_owned(), msg.temporary_channel_id.clone()));
4153 let outbound_scid_alias = self.create_and_insert_outbound_scid_alias();
4154 let mut channel = match Channel::new_from_req(&self.fee_estimator, &self.keys_manager,
4155 counterparty_node_id.clone(), &their_features, msg, 0, &self.default_configuration,
4156 self.best_block.read().unwrap().height(), &self.logger, outbound_scid_alias)
4159 self.outbound_scid_aliases.lock().unwrap().remove(&outbound_scid_alias);
4160 return Err(MsgHandleErrInternal::from_chan_no_close(e, msg.temporary_channel_id));
4164 let mut channel_state_lock = self.channel_state.lock().unwrap();
4165 let channel_state = &mut *channel_state_lock;
4166 match channel_state.by_id.entry(channel.channel_id()) {
4167 hash_map::Entry::Occupied(_) => {
4168 self.outbound_scid_aliases.lock().unwrap().remove(&outbound_scid_alias);
4169 return Err(MsgHandleErrInternal::send_err_msg_no_close("temporary_channel_id collision!".to_owned(), msg.temporary_channel_id.clone()))
4171 hash_map::Entry::Vacant(entry) => {
4172 if !self.default_configuration.manually_accept_inbound_channels {
4173 channel_state.pending_msg_events.push(events::MessageSendEvent::SendAcceptChannel {
4174 node_id: counterparty_node_id.clone(),
4175 msg: channel.accept_inbound_channel(0),
4178 let mut pending_events = self.pending_events.lock().unwrap();
4179 pending_events.push(
4180 events::Event::OpenChannelRequest {
4181 temporary_channel_id: msg.temporary_channel_id.clone(),
4182 counterparty_node_id: counterparty_node_id.clone(),
4183 funding_satoshis: msg.funding_satoshis,
4184 push_msat: msg.push_msat,
4185 channel_type: channel.get_channel_type().clone(),
4190 entry.insert(channel);
4196 fn internal_accept_channel(&self, counterparty_node_id: &PublicKey, their_features: InitFeatures, msg: &msgs::AcceptChannel) -> Result<(), MsgHandleErrInternal> {
4197 let (value, output_script, user_id) = {
4198 let mut channel_lock = self.channel_state.lock().unwrap();
4199 let channel_state = &mut *channel_lock;
4200 match channel_state.by_id.entry(msg.temporary_channel_id) {
4201 hash_map::Entry::Occupied(mut chan) => {
4202 if chan.get().get_counterparty_node_id() != *counterparty_node_id {
4203 return Err(MsgHandleErrInternal::send_err_msg_no_close("Got a message for a channel from the wrong node!".to_owned(), msg.temporary_channel_id));
4205 try_chan_entry!(self, chan.get_mut().accept_channel(&msg, &self.default_configuration.peer_channel_config_limits, &their_features), channel_state, chan);
4206 (chan.get().get_value_satoshis(), chan.get().get_funding_redeemscript().to_v0_p2wsh(), chan.get().get_user_id())
4208 hash_map::Entry::Vacant(_) => return Err(MsgHandleErrInternal::send_err_msg_no_close("Failed to find corresponding channel".to_owned(), msg.temporary_channel_id))
4211 let mut pending_events = self.pending_events.lock().unwrap();
4212 pending_events.push(events::Event::FundingGenerationReady {
4213 temporary_channel_id: msg.temporary_channel_id,
4214 channel_value_satoshis: value,
4216 user_channel_id: user_id,
4221 fn internal_funding_created(&self, counterparty_node_id: &PublicKey, msg: &msgs::FundingCreated) -> Result<(), MsgHandleErrInternal> {
4222 let ((funding_msg, monitor), mut chan) = {
4223 let best_block = *self.best_block.read().unwrap();
4224 let mut channel_lock = self.channel_state.lock().unwrap();
4225 let channel_state = &mut *channel_lock;
4226 match channel_state.by_id.entry(msg.temporary_channel_id.clone()) {
4227 hash_map::Entry::Occupied(mut chan) => {
4228 if chan.get().get_counterparty_node_id() != *counterparty_node_id {
4229 return Err(MsgHandleErrInternal::send_err_msg_no_close("Got a message for a channel from the wrong node!".to_owned(), msg.temporary_channel_id));
4231 (try_chan_entry!(self, chan.get_mut().funding_created(msg, best_block, &self.logger), channel_state, chan), chan.remove())
4233 hash_map::Entry::Vacant(_) => return Err(MsgHandleErrInternal::send_err_msg_no_close("Failed to find corresponding channel".to_owned(), msg.temporary_channel_id))
4236 // Because we have exclusive ownership of the channel here we can release the channel_state
4237 // lock before watch_channel
4238 if let Err(e) = self.chain_monitor.watch_channel(monitor.get_funding_txo().0, monitor) {
4240 ChannelMonitorUpdateErr::PermanentFailure => {
4241 // Note that we reply with the new channel_id in error messages if we gave up on the
4242 // channel, not the temporary_channel_id. This is compatible with ourselves, but the
4243 // spec is somewhat ambiguous here. Not a huge deal since we'll send error messages for
4244 // any messages referencing a previously-closed channel anyway.
4245 // We do not do a force-close here as that would generate a monitor update for
4246 // a monitor that we didn't manage to store (and that we don't care about - we
4247 // don't respond with the funding_signed so the channel can never go on chain).
4248 let (_monitor_update, failed_htlcs) = chan.force_shutdown(true);
4249 assert!(failed_htlcs.is_empty());
4250 return Err(MsgHandleErrInternal::send_err_msg_no_close("ChannelMonitor storage failure".to_owned(), funding_msg.channel_id));
4252 ChannelMonitorUpdateErr::TemporaryFailure => {
4253 // There's no problem signing a counterparty's funding transaction if our monitor
4254 // hasn't persisted to disk yet - we can't lose money on a transaction that we haven't
4255 // accepted payment from yet. We do, however, need to wait to send our funding_locked
4256 // until we have persisted our monitor.
4257 chan.monitor_update_failed(false, false, Vec::new(), Vec::new(), Vec::new());
4261 let mut channel_state_lock = self.channel_state.lock().unwrap();
4262 let channel_state = &mut *channel_state_lock;
4263 match channel_state.by_id.entry(funding_msg.channel_id) {
4264 hash_map::Entry::Occupied(_) => {
4265 return Err(MsgHandleErrInternal::send_err_msg_no_close("Already had channel with the new channel_id".to_owned(), funding_msg.channel_id))
4267 hash_map::Entry::Vacant(e) => {
4268 channel_state.pending_msg_events.push(events::MessageSendEvent::SendFundingSigned {
4269 node_id: counterparty_node_id.clone(),
4278 fn internal_funding_signed(&self, counterparty_node_id: &PublicKey, msg: &msgs::FundingSigned) -> Result<(), MsgHandleErrInternal> {
4280 let best_block = *self.best_block.read().unwrap();
4281 let mut channel_lock = self.channel_state.lock().unwrap();
4282 let channel_state = &mut *channel_lock;
4283 match channel_state.by_id.entry(msg.channel_id) {
4284 hash_map::Entry::Occupied(mut chan) => {
4285 if chan.get().get_counterparty_node_id() != *counterparty_node_id {
4286 return Err(MsgHandleErrInternal::send_err_msg_no_close("Got a message for a channel from the wrong node!".to_owned(), msg.channel_id));
4288 let (monitor, funding_tx) = match chan.get_mut().funding_signed(&msg, best_block, &self.logger) {
4289 Ok(update) => update,
4290 Err(e) => try_chan_entry!(self, Err(e), channel_state, chan),
4292 if let Err(e) = self.chain_monitor.watch_channel(chan.get().get_funding_txo().unwrap(), monitor) {
4293 let mut res = handle_monitor_err!(self, e, channel_state, chan, RAACommitmentOrder::RevokeAndACKFirst, false, false);
4294 if let Err(MsgHandleErrInternal { ref mut shutdown_finish, .. }) = res {
4295 // We weren't able to watch the channel to begin with, so no updates should be made on
4296 // it. Previously, full_stack_target found an (unreachable) panic when the
4297 // monitor update contained within `shutdown_finish` was applied.
4298 if let Some((ref mut shutdown_finish, _)) = shutdown_finish {
4299 shutdown_finish.0.take();
4306 hash_map::Entry::Vacant(_) => return Err(MsgHandleErrInternal::send_err_msg_no_close("Failed to find corresponding channel".to_owned(), msg.channel_id))
4309 log_info!(self.logger, "Broadcasting funding transaction with txid {}", funding_tx.txid());
4310 self.tx_broadcaster.broadcast_transaction(&funding_tx);
4314 fn internal_funding_locked(&self, counterparty_node_id: &PublicKey, msg: &msgs::FundingLocked) -> Result<(), MsgHandleErrInternal> {
4315 let mut channel_state_lock = self.channel_state.lock().unwrap();
4316 let channel_state = &mut *channel_state_lock;
4317 match channel_state.by_id.entry(msg.channel_id) {
4318 hash_map::Entry::Occupied(mut chan) => {
4319 if chan.get().get_counterparty_node_id() != *counterparty_node_id {
4320 return Err(MsgHandleErrInternal::send_err_msg_no_close("Got a message for a channel from the wrong node!".to_owned(), msg.channel_id));
4322 let announcement_sigs_opt = try_chan_entry!(self, chan.get_mut().funding_locked(&msg, self.get_our_node_id(),
4323 self.genesis_hash.clone(), &self.best_block.read().unwrap(), &self.logger), channel_state, chan);
4324 if let Some(announcement_sigs) = announcement_sigs_opt {
4325 log_trace!(self.logger, "Sending announcement_signatures for channel {}", log_bytes!(chan.get().channel_id()));
4326 channel_state.pending_msg_events.push(events::MessageSendEvent::SendAnnouncementSignatures {
4327 node_id: counterparty_node_id.clone(),
4328 msg: announcement_sigs,
4330 } else if chan.get().is_usable() {
4331 // If we're sending an announcement_signatures, we'll send the (public)
4332 // channel_update after sending a channel_announcement when we receive our
4333 // counterparty's announcement_signatures. Thus, we only bother to send a
4334 // channel_update here if the channel is not public, i.e. we're not sending an
4335 // announcement_signatures.
4336 log_trace!(self.logger, "Sending private initial channel_update for our counterparty on channel {}", log_bytes!(chan.get().channel_id()));
4337 if let Ok(msg) = self.get_channel_update_for_unicast(chan.get()) {
4338 channel_state.pending_msg_events.push(events::MessageSendEvent::SendChannelUpdate {
4339 node_id: counterparty_node_id.clone(),
4346 hash_map::Entry::Vacant(_) => Err(MsgHandleErrInternal::send_err_msg_no_close("Failed to find corresponding channel".to_owned(), msg.channel_id))
4350 fn internal_shutdown(&self, counterparty_node_id: &PublicKey, their_features: &InitFeatures, msg: &msgs::Shutdown) -> Result<(), MsgHandleErrInternal> {
4351 let mut dropped_htlcs: Vec<(HTLCSource, PaymentHash)>;
4352 let result: Result<(), _> = loop {
4353 let mut channel_state_lock = self.channel_state.lock().unwrap();
4354 let channel_state = &mut *channel_state_lock;
4356 match channel_state.by_id.entry(msg.channel_id.clone()) {
4357 hash_map::Entry::Occupied(mut chan_entry) => {
4358 if chan_entry.get().get_counterparty_node_id() != *counterparty_node_id {
4359 return Err(MsgHandleErrInternal::send_err_msg_no_close("Got a message for a channel from the wrong node!".to_owned(), msg.channel_id));
4362 if !chan_entry.get().received_shutdown() {
4363 log_info!(self.logger, "Received a shutdown message from our counterparty for channel {}{}.",
4364 log_bytes!(msg.channel_id),
4365 if chan_entry.get().sent_shutdown() { " after we initiated shutdown" } else { "" });
4368 let (shutdown, monitor_update, htlcs) = try_chan_entry!(self, chan_entry.get_mut().shutdown(&self.keys_manager, &their_features, &msg), channel_state, chan_entry);
4369 dropped_htlcs = htlcs;
4371 // Update the monitor with the shutdown script if necessary.
4372 if let Some(monitor_update) = monitor_update {
4373 if let Err(e) = self.chain_monitor.update_channel(chan_entry.get().get_funding_txo().unwrap(), monitor_update) {
4374 let (result, is_permanent) =
4375 handle_monitor_err!(self, e, channel_state.short_to_id, chan_entry.get_mut(), RAACommitmentOrder::CommitmentFirst, chan_entry.key(), NO_UPDATE);
4377 remove_channel!(self, channel_state, chan_entry);
4383 if let Some(msg) = shutdown {
4384 channel_state.pending_msg_events.push(events::MessageSendEvent::SendShutdown {
4385 node_id: *counterparty_node_id,
4392 hash_map::Entry::Vacant(_) => return Err(MsgHandleErrInternal::send_err_msg_no_close("Failed to find corresponding channel".to_owned(), msg.channel_id))
4395 for htlc_source in dropped_htlcs.drain(..) {
4396 self.fail_htlc_backwards_internal(self.channel_state.lock().unwrap(), htlc_source.0, &htlc_source.1, HTLCFailReason::Reason { failure_code: 0x4000 | 8, data: Vec::new() });
4399 let _ = handle_error!(self, result, *counterparty_node_id);
4403 fn internal_closing_signed(&self, counterparty_node_id: &PublicKey, msg: &msgs::ClosingSigned) -> Result<(), MsgHandleErrInternal> {
4404 let (tx, chan_option) = {
4405 let mut channel_state_lock = self.channel_state.lock().unwrap();
4406 let channel_state = &mut *channel_state_lock;
4407 match channel_state.by_id.entry(msg.channel_id.clone()) {
4408 hash_map::Entry::Occupied(mut chan_entry) => {
4409 if chan_entry.get().get_counterparty_node_id() != *counterparty_node_id {
4410 return Err(MsgHandleErrInternal::send_err_msg_no_close("Got a message for a channel from the wrong node!".to_owned(), msg.channel_id));
4412 let (closing_signed, tx) = try_chan_entry!(self, chan_entry.get_mut().closing_signed(&self.fee_estimator, &msg), channel_state, chan_entry);
4413 if let Some(msg) = closing_signed {
4414 channel_state.pending_msg_events.push(events::MessageSendEvent::SendClosingSigned {
4415 node_id: counterparty_node_id.clone(),
4420 // We're done with this channel, we've got a signed closing transaction and
4421 // will send the closing_signed back to the remote peer upon return. This
4422 // also implies there are no pending HTLCs left on the channel, so we can
4423 // fully delete it from tracking (the channel monitor is still around to
4424 // watch for old state broadcasts)!
4425 (tx, Some(remove_channel!(self, channel_state, chan_entry)))
4426 } else { (tx, None) }
4428 hash_map::Entry::Vacant(_) => return Err(MsgHandleErrInternal::send_err_msg_no_close("Failed to find corresponding channel".to_owned(), msg.channel_id))
4431 if let Some(broadcast_tx) = tx {
4432 log_info!(self.logger, "Broadcasting {}", log_tx!(broadcast_tx));
4433 self.tx_broadcaster.broadcast_transaction(&broadcast_tx);
4435 if let Some(chan) = chan_option {
4436 if let Ok(update) = self.get_channel_update_for_broadcast(&chan) {
4437 let mut channel_state = self.channel_state.lock().unwrap();
4438 channel_state.pending_msg_events.push(events::MessageSendEvent::BroadcastChannelUpdate {
4442 self.issue_channel_close_events(&chan, ClosureReason::CooperativeClosure);
4447 fn internal_update_add_htlc(&self, counterparty_node_id: &PublicKey, msg: &msgs::UpdateAddHTLC) -> Result<(), MsgHandleErrInternal> {
4448 //TODO: BOLT 4 points out a specific attack where a peer may re-send an onion packet and
4449 //determine the state of the payment based on our response/if we forward anything/the time
4450 //we take to respond. We should take care to avoid allowing such an attack.
4452 //TODO: There exists a further attack where a node may garble the onion data, forward it to
4453 //us repeatedly garbled in different ways, and compare our error messages, which are
4454 //encrypted with the same key. It's not immediately obvious how to usefully exploit that,
4455 //but we should prevent it anyway.
4457 let (pending_forward_info, mut channel_state_lock) = self.decode_update_add_htlc_onion(msg);
4458 let channel_state = &mut *channel_state_lock;
4460 match channel_state.by_id.entry(msg.channel_id) {
4461 hash_map::Entry::Occupied(mut chan) => {
4462 if chan.get().get_counterparty_node_id() != *counterparty_node_id {
4463 return Err(MsgHandleErrInternal::send_err_msg_no_close("Got a message for a channel from the wrong node!".to_owned(), msg.channel_id));
4466 let create_pending_htlc_status = |chan: &Channel<Signer>, pending_forward_info: PendingHTLCStatus, error_code: u16| {
4467 // If the update_add is completely bogus, the call will Err and we will close,
4468 // but if we've sent a shutdown and they haven't acknowledged it yet, we just
4469 // want to reject the new HTLC and fail it backwards instead of forwarding.
4470 match pending_forward_info {
4471 PendingHTLCStatus::Forward(PendingHTLCInfo { ref incoming_shared_secret, .. }) => {
4472 let reason = if (error_code & 0x1000) != 0 {
4473 let (real_code, error_data) = self.get_htlc_inbound_temp_fail_err_and_data(error_code, chan);
4474 onion_utils::build_first_hop_failure_packet(incoming_shared_secret, real_code, &error_data)
4476 onion_utils::build_first_hop_failure_packet(incoming_shared_secret, error_code, &[])
4478 let msg = msgs::UpdateFailHTLC {
4479 channel_id: msg.channel_id,
4480 htlc_id: msg.htlc_id,
4483 PendingHTLCStatus::Fail(HTLCFailureMsg::Relay(msg))
4485 _ => pending_forward_info
4488 try_chan_entry!(self, chan.get_mut().update_add_htlc(&msg, pending_forward_info, create_pending_htlc_status, &self.logger), channel_state, chan);
4490 hash_map::Entry::Vacant(_) => return Err(MsgHandleErrInternal::send_err_msg_no_close("Failed to find corresponding channel".to_owned(), msg.channel_id))
4495 fn internal_update_fulfill_htlc(&self, counterparty_node_id: &PublicKey, msg: &msgs::UpdateFulfillHTLC) -> Result<(), MsgHandleErrInternal> {
4496 let mut channel_lock = self.channel_state.lock().unwrap();
4497 let (htlc_source, forwarded_htlc_value) = {
4498 let channel_state = &mut *channel_lock;
4499 match channel_state.by_id.entry(msg.channel_id) {
4500 hash_map::Entry::Occupied(mut chan) => {
4501 if chan.get().get_counterparty_node_id() != *counterparty_node_id {
4502 return Err(MsgHandleErrInternal::send_err_msg_no_close("Got a message for a channel from the wrong node!".to_owned(), msg.channel_id));
4504 try_chan_entry!(self, chan.get_mut().update_fulfill_htlc(&msg), channel_state, chan)
4506 hash_map::Entry::Vacant(_) => return Err(MsgHandleErrInternal::send_err_msg_no_close("Failed to find corresponding channel".to_owned(), msg.channel_id))
4509 self.claim_funds_internal(channel_lock, htlc_source, msg.payment_preimage.clone(), Some(forwarded_htlc_value), false);
4513 fn internal_update_fail_htlc(&self, counterparty_node_id: &PublicKey, msg: &msgs::UpdateFailHTLC) -> Result<(), MsgHandleErrInternal> {
4514 let mut channel_lock = self.channel_state.lock().unwrap();
4515 let channel_state = &mut *channel_lock;
4516 match channel_state.by_id.entry(msg.channel_id) {
4517 hash_map::Entry::Occupied(mut chan) => {
4518 if chan.get().get_counterparty_node_id() != *counterparty_node_id {
4519 return Err(MsgHandleErrInternal::send_err_msg_no_close("Got a message for a channel from the wrong node!".to_owned(), msg.channel_id));
4521 try_chan_entry!(self, chan.get_mut().update_fail_htlc(&msg, HTLCFailReason::LightningError { err: msg.reason.clone() }), channel_state, chan);
4523 hash_map::Entry::Vacant(_) => return Err(MsgHandleErrInternal::send_err_msg_no_close("Failed to find corresponding channel".to_owned(), msg.channel_id))
4528 fn internal_update_fail_malformed_htlc(&self, counterparty_node_id: &PublicKey, msg: &msgs::UpdateFailMalformedHTLC) -> Result<(), MsgHandleErrInternal> {
4529 let mut channel_lock = self.channel_state.lock().unwrap();
4530 let channel_state = &mut *channel_lock;
4531 match channel_state.by_id.entry(msg.channel_id) {
4532 hash_map::Entry::Occupied(mut chan) => {
4533 if chan.get().get_counterparty_node_id() != *counterparty_node_id {
4534 return Err(MsgHandleErrInternal::send_err_msg_no_close("Got a message for a channel from the wrong node!".to_owned(), msg.channel_id));
4536 if (msg.failure_code & 0x8000) == 0 {
4537 let chan_err: ChannelError = ChannelError::Close("Got update_fail_malformed_htlc with BADONION not set".to_owned());
4538 try_chan_entry!(self, Err(chan_err), channel_state, chan);
4540 try_chan_entry!(self, chan.get_mut().update_fail_malformed_htlc(&msg, HTLCFailReason::Reason { failure_code: msg.failure_code, data: Vec::new() }), channel_state, chan);
4543 hash_map::Entry::Vacant(_) => return Err(MsgHandleErrInternal::send_err_msg_no_close("Failed to find corresponding channel".to_owned(), msg.channel_id))
4547 fn internal_commitment_signed(&self, counterparty_node_id: &PublicKey, msg: &msgs::CommitmentSigned) -> Result<(), MsgHandleErrInternal> {
4548 let mut channel_state_lock = self.channel_state.lock().unwrap();
4549 let channel_state = &mut *channel_state_lock;
4550 match channel_state.by_id.entry(msg.channel_id) {
4551 hash_map::Entry::Occupied(mut chan) => {
4552 if chan.get().get_counterparty_node_id() != *counterparty_node_id {
4553 return Err(MsgHandleErrInternal::send_err_msg_no_close("Got a message for a channel from the wrong node!".to_owned(), msg.channel_id));
4555 let (revoke_and_ack, commitment_signed, monitor_update) =
4556 match chan.get_mut().commitment_signed(&msg, &self.logger) {
4557 Err((None, e)) => try_chan_entry!(self, Err(e), channel_state, chan),
4558 Err((Some(update), e)) => {
4559 assert!(chan.get().is_awaiting_monitor_update());
4560 let _ = self.chain_monitor.update_channel(chan.get().get_funding_txo().unwrap(), update);
4561 try_chan_entry!(self, Err(e), channel_state, chan);
4566 if let Err(e) = self.chain_monitor.update_channel(chan.get().get_funding_txo().unwrap(), monitor_update) {
4567 return_monitor_err!(self, e, channel_state, chan, RAACommitmentOrder::RevokeAndACKFirst, true, commitment_signed.is_some());
4569 channel_state.pending_msg_events.push(events::MessageSendEvent::SendRevokeAndACK {
4570 node_id: counterparty_node_id.clone(),
4571 msg: revoke_and_ack,
4573 if let Some(msg) = commitment_signed {
4574 channel_state.pending_msg_events.push(events::MessageSendEvent::UpdateHTLCs {
4575 node_id: counterparty_node_id.clone(),
4576 updates: msgs::CommitmentUpdate {
4577 update_add_htlcs: Vec::new(),
4578 update_fulfill_htlcs: Vec::new(),
4579 update_fail_htlcs: Vec::new(),
4580 update_fail_malformed_htlcs: Vec::new(),
4582 commitment_signed: msg,
4588 hash_map::Entry::Vacant(_) => return Err(MsgHandleErrInternal::send_err_msg_no_close("Failed to find corresponding channel".to_owned(), msg.channel_id))
4593 fn forward_htlcs(&self, per_source_pending_forwards: &mut [(u64, OutPoint, Vec<(PendingHTLCInfo, u64)>)]) {
4594 for &mut (prev_short_channel_id, prev_funding_outpoint, ref mut pending_forwards) in per_source_pending_forwards {
4595 let mut forward_event = None;
4596 if !pending_forwards.is_empty() {
4597 let mut channel_state = self.channel_state.lock().unwrap();
4598 if channel_state.forward_htlcs.is_empty() {
4599 forward_event = Some(Duration::from_millis(MIN_HTLC_RELAY_HOLDING_CELL_MILLIS))
4601 for (forward_info, prev_htlc_id) in pending_forwards.drain(..) {
4602 match channel_state.forward_htlcs.entry(match forward_info.routing {
4603 PendingHTLCRouting::Forward { short_channel_id, .. } => short_channel_id,
4604 PendingHTLCRouting::Receive { .. } => 0,
4605 PendingHTLCRouting::ReceiveKeysend { .. } => 0,
4607 hash_map::Entry::Occupied(mut entry) => {
4608 entry.get_mut().push(HTLCForwardInfo::AddHTLC { prev_short_channel_id, prev_funding_outpoint,
4609 prev_htlc_id, forward_info });
4611 hash_map::Entry::Vacant(entry) => {
4612 entry.insert(vec!(HTLCForwardInfo::AddHTLC { prev_short_channel_id, prev_funding_outpoint,
4613 prev_htlc_id, forward_info }));
4618 match forward_event {
4620 let mut pending_events = self.pending_events.lock().unwrap();
4621 pending_events.push(events::Event::PendingHTLCsForwardable {
4622 time_forwardable: time
4630 fn internal_revoke_and_ack(&self, counterparty_node_id: &PublicKey, msg: &msgs::RevokeAndACK) -> Result<(), MsgHandleErrInternal> {
4631 let mut htlcs_to_fail = Vec::new();
4633 let mut channel_state_lock = self.channel_state.lock().unwrap();
4634 let channel_state = &mut *channel_state_lock;
4635 match channel_state.by_id.entry(msg.channel_id) {
4636 hash_map::Entry::Occupied(mut chan) => {
4637 if chan.get().get_counterparty_node_id() != *counterparty_node_id {
4638 break Err(MsgHandleErrInternal::send_err_msg_no_close("Got a message for a channel from the wrong node!".to_owned(), msg.channel_id));
4640 let was_frozen_for_monitor = chan.get().is_awaiting_monitor_update();
4641 let raa_updates = break_chan_entry!(self,
4642 chan.get_mut().revoke_and_ack(&msg, &self.logger), channel_state, chan);
4643 htlcs_to_fail = raa_updates.holding_cell_failed_htlcs;
4644 if let Err(e) = self.chain_monitor.update_channel(chan.get().get_funding_txo().unwrap(), raa_updates.monitor_update) {
4645 if was_frozen_for_monitor {
4646 assert!(raa_updates.commitment_update.is_none());
4647 assert!(raa_updates.accepted_htlcs.is_empty());
4648 assert!(raa_updates.failed_htlcs.is_empty());
4649 assert!(raa_updates.finalized_claimed_htlcs.is_empty());
4650 break Err(MsgHandleErrInternal::ignore_no_close("Previous monitor update failure prevented responses to RAA".to_owned()));
4652 if let Err(e) = handle_monitor_err!(self, e, channel_state, chan,
4653 RAACommitmentOrder::CommitmentFirst, false,
4654 raa_updates.commitment_update.is_some(),
4655 raa_updates.accepted_htlcs, raa_updates.failed_htlcs,
4656 raa_updates.finalized_claimed_htlcs) {
4658 } else { unreachable!(); }
4661 if let Some(updates) = raa_updates.commitment_update {
4662 channel_state.pending_msg_events.push(events::MessageSendEvent::UpdateHTLCs {
4663 node_id: counterparty_node_id.clone(),
4667 break Ok((raa_updates.accepted_htlcs, raa_updates.failed_htlcs,
4668 raa_updates.finalized_claimed_htlcs,
4669 chan.get().get_short_channel_id()
4670 .expect("RAA should only work on a short-id-available channel"),
4671 chan.get().get_funding_txo().unwrap()))
4673 hash_map::Entry::Vacant(_) => break Err(MsgHandleErrInternal::send_err_msg_no_close("Failed to find corresponding channel".to_owned(), msg.channel_id))
4676 self.fail_holding_cell_htlcs(htlcs_to_fail, msg.channel_id);
4678 Ok((pending_forwards, mut pending_failures, finalized_claim_htlcs,
4679 short_channel_id, channel_outpoint)) =>
4681 for failure in pending_failures.drain(..) {
4682 self.fail_htlc_backwards_internal(self.channel_state.lock().unwrap(), failure.0, &failure.1, failure.2);
4684 self.forward_htlcs(&mut [(short_channel_id, channel_outpoint, pending_forwards)]);
4685 self.finalize_claims(finalized_claim_htlcs);
4692 fn internal_update_fee(&self, counterparty_node_id: &PublicKey, msg: &msgs::UpdateFee) -> Result<(), MsgHandleErrInternal> {
4693 let mut channel_lock = self.channel_state.lock().unwrap();
4694 let channel_state = &mut *channel_lock;
4695 match channel_state.by_id.entry(msg.channel_id) {
4696 hash_map::Entry::Occupied(mut chan) => {
4697 if chan.get().get_counterparty_node_id() != *counterparty_node_id {
4698 return Err(MsgHandleErrInternal::send_err_msg_no_close("Got a message for a channel from the wrong node!".to_owned(), msg.channel_id));
4700 try_chan_entry!(self, chan.get_mut().update_fee(&self.fee_estimator, &msg), channel_state, chan);
4702 hash_map::Entry::Vacant(_) => return Err(MsgHandleErrInternal::send_err_msg_no_close("Failed to find corresponding channel".to_owned(), msg.channel_id))
4707 fn internal_announcement_signatures(&self, counterparty_node_id: &PublicKey, msg: &msgs::AnnouncementSignatures) -> Result<(), MsgHandleErrInternal> {
4708 let mut channel_state_lock = self.channel_state.lock().unwrap();
4709 let channel_state = &mut *channel_state_lock;
4711 match channel_state.by_id.entry(msg.channel_id) {
4712 hash_map::Entry::Occupied(mut chan) => {
4713 if chan.get().get_counterparty_node_id() != *counterparty_node_id {
4714 return Err(MsgHandleErrInternal::send_err_msg_no_close("Got a message for a channel from the wrong node!".to_owned(), msg.channel_id));
4716 if !chan.get().is_usable() {
4717 return Err(MsgHandleErrInternal::from_no_close(LightningError{err: "Got an announcement_signatures before we were ready for it".to_owned(), action: msgs::ErrorAction::IgnoreError}));
4720 channel_state.pending_msg_events.push(events::MessageSendEvent::BroadcastChannelAnnouncement {
4721 msg: try_chan_entry!(self, chan.get_mut().announcement_signatures(
4722 self.get_our_node_id(), self.genesis_hash.clone(), self.best_block.read().unwrap().height(), msg), channel_state, chan),
4723 // Note that announcement_signatures fails if the channel cannot be announced,
4724 // so get_channel_update_for_broadcast will never fail by the time we get here.
4725 update_msg: self.get_channel_update_for_broadcast(chan.get()).unwrap(),
4728 hash_map::Entry::Vacant(_) => return Err(MsgHandleErrInternal::send_err_msg_no_close("Failed to find corresponding channel".to_owned(), msg.channel_id))
4733 /// Returns ShouldPersist if anything changed, otherwise either SkipPersist or an Err.
4734 fn internal_channel_update(&self, counterparty_node_id: &PublicKey, msg: &msgs::ChannelUpdate) -> Result<NotifyOption, MsgHandleErrInternal> {
4735 let mut channel_state_lock = self.channel_state.lock().unwrap();
4736 let channel_state = &mut *channel_state_lock;
4737 let chan_id = match channel_state.short_to_id.get(&msg.contents.short_channel_id) {
4738 Some(chan_id) => chan_id.clone(),
4740 // It's not a local channel
4741 return Ok(NotifyOption::SkipPersist)
4744 match channel_state.by_id.entry(chan_id) {
4745 hash_map::Entry::Occupied(mut chan) => {
4746 if chan.get().get_counterparty_node_id() != *counterparty_node_id {
4747 if chan.get().should_announce() {
4748 // If the announcement is about a channel of ours which is public, some
4749 // other peer may simply be forwarding all its gossip to us. Don't provide
4750 // a scary-looking error message and return Ok instead.
4751 return Ok(NotifyOption::SkipPersist);
4753 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));
4755 let were_node_one = self.get_our_node_id().serialize()[..] < chan.get().get_counterparty_node_id().serialize()[..];
4756 let msg_from_node_one = msg.contents.flags & 1 == 0;
4757 if were_node_one == msg_from_node_one {
4758 return Ok(NotifyOption::SkipPersist);
4760 try_chan_entry!(self, chan.get_mut().channel_update(&msg), channel_state, chan);
4763 hash_map::Entry::Vacant(_) => unreachable!()
4765 Ok(NotifyOption::DoPersist)
4768 fn internal_channel_reestablish(&self, counterparty_node_id: &PublicKey, msg: &msgs::ChannelReestablish) -> Result<(), MsgHandleErrInternal> {
4769 let chan_restoration_res;
4770 let (htlcs_failed_forward, need_lnd_workaround) = {
4771 let mut channel_state_lock = self.channel_state.lock().unwrap();
4772 let channel_state = &mut *channel_state_lock;
4774 match channel_state.by_id.entry(msg.channel_id) {
4775 hash_map::Entry::Occupied(mut chan) => {
4776 if chan.get().get_counterparty_node_id() != *counterparty_node_id {
4777 return Err(MsgHandleErrInternal::send_err_msg_no_close("Got a message for a channel from the wrong node!".to_owned(), msg.channel_id));
4779 // Currently, we expect all holding cell update_adds to be dropped on peer
4780 // disconnect, so Channel's reestablish will never hand us any holding cell
4781 // freed HTLCs to fail backwards. If in the future we no longer drop pending
4782 // add-HTLCs on disconnect, we may be handed HTLCs to fail backwards here.
4783 let responses = try_chan_entry!(self, chan.get_mut().channel_reestablish(
4784 msg, &self.logger, self.our_network_pubkey.clone(), self.genesis_hash,
4785 &*self.best_block.read().unwrap()), channel_state, chan);
4786 let mut channel_update = None;
4787 if let Some(msg) = responses.shutdown_msg {
4788 channel_state.pending_msg_events.push(events::MessageSendEvent::SendShutdown {
4789 node_id: counterparty_node_id.clone(),
4792 } else if chan.get().is_usable() {
4793 // If the channel is in a usable state (ie the channel is not being shut
4794 // down), send a unicast channel_update to our counterparty to make sure
4795 // they have the latest channel parameters.
4796 if let Ok(msg) = self.get_channel_update_for_unicast(chan.get()) {
4797 channel_update = Some(events::MessageSendEvent::SendChannelUpdate {
4798 node_id: chan.get().get_counterparty_node_id(),
4803 let need_lnd_workaround = chan.get_mut().workaround_lnd_bug_4006.take();
4804 chan_restoration_res = handle_chan_restoration_locked!(
4805 self, channel_state_lock, channel_state, chan, responses.raa, responses.commitment_update, responses.order,
4806 responses.mon_update, Vec::new(), None, responses.funding_locked, responses.announcement_sigs);
4807 if let Some(upd) = channel_update {
4808 channel_state.pending_msg_events.push(upd);
4810 (responses.holding_cell_failed_htlcs, need_lnd_workaround)
4812 hash_map::Entry::Vacant(_) => return Err(MsgHandleErrInternal::send_err_msg_no_close("Failed to find corresponding channel".to_owned(), msg.channel_id))
4815 post_handle_chan_restoration!(self, chan_restoration_res);
4816 self.fail_holding_cell_htlcs(htlcs_failed_forward, msg.channel_id);
4818 if let Some(funding_locked_msg) = need_lnd_workaround {
4819 self.internal_funding_locked(counterparty_node_id, &funding_locked_msg)?;
4824 /// Process pending events from the `chain::Watch`, returning whether any events were processed.
4825 fn process_pending_monitor_events(&self) -> bool {
4826 let mut failed_channels = Vec::new();
4827 let mut pending_monitor_events = self.chain_monitor.release_pending_monitor_events();
4828 let has_pending_monitor_events = !pending_monitor_events.is_empty();
4829 for monitor_event in pending_monitor_events.drain(..) {
4830 match monitor_event {
4831 MonitorEvent::HTLCEvent(htlc_update) => {
4832 if let Some(preimage) = htlc_update.payment_preimage {
4833 log_trace!(self.logger, "Claiming HTLC with preimage {} from our monitor", log_bytes!(preimage.0));
4834 self.claim_funds_internal(self.channel_state.lock().unwrap(), htlc_update.source, preimage, htlc_update.onchain_value_satoshis.map(|v| v * 1000), true);
4836 log_trace!(self.logger, "Failing HTLC with hash {} from our monitor", log_bytes!(htlc_update.payment_hash.0));
4837 self.fail_htlc_backwards_internal(self.channel_state.lock().unwrap(), htlc_update.source, &htlc_update.payment_hash, HTLCFailReason::Reason { failure_code: 0x4000 | 8, data: Vec::new() });
4840 MonitorEvent::CommitmentTxConfirmed(funding_outpoint) |
4841 MonitorEvent::UpdateFailed(funding_outpoint) => {
4842 let mut channel_lock = self.channel_state.lock().unwrap();
4843 let channel_state = &mut *channel_lock;
4844 let by_id = &mut channel_state.by_id;
4845 let pending_msg_events = &mut channel_state.pending_msg_events;
4846 if let hash_map::Entry::Occupied(chan_entry) = by_id.entry(funding_outpoint.to_channel_id()) {
4847 let mut chan = remove_channel!(self, channel_state, chan_entry);
4848 failed_channels.push(chan.force_shutdown(false));
4849 if let Ok(update) = self.get_channel_update_for_broadcast(&chan) {
4850 pending_msg_events.push(events::MessageSendEvent::BroadcastChannelUpdate {
4854 let reason = if let MonitorEvent::UpdateFailed(_) = monitor_event {
4855 ClosureReason::ProcessingError { err: "Failed to persist ChannelMonitor update during chain sync".to_string() }
4857 ClosureReason::CommitmentTxConfirmed
4859 self.issue_channel_close_events(&chan, reason);
4860 pending_msg_events.push(events::MessageSendEvent::HandleError {
4861 node_id: chan.get_counterparty_node_id(),
4862 action: msgs::ErrorAction::SendErrorMessage {
4863 msg: msgs::ErrorMessage { channel_id: chan.channel_id(), data: "Channel force-closed".to_owned() }
4868 MonitorEvent::UpdateCompleted { funding_txo, monitor_update_id } => {
4869 self.channel_monitor_updated(&funding_txo, monitor_update_id);
4874 for failure in failed_channels.drain(..) {
4875 self.finish_force_close_channel(failure);
4878 has_pending_monitor_events
4881 /// In chanmon_consistency_target, we'd like to be able to restore monitor updating without
4882 /// handling all pending events (i.e. not PendingHTLCsForwardable). Thus, we expose monitor
4883 /// update events as a separate process method here.
4885 pub fn process_monitor_events(&self) {
4886 self.process_pending_monitor_events();
4889 /// Check the holding cell in each channel and free any pending HTLCs in them if possible.
4890 /// Returns whether there were any updates such as if pending HTLCs were freed or a monitor
4891 /// update was applied.
4893 /// This should only apply to HTLCs which were added to the holding cell because we were
4894 /// waiting on a monitor update to finish. In that case, we don't want to free the holding cell
4895 /// directly in `channel_monitor_updated` as it may introduce deadlocks calling back into user
4896 /// code to inform them of a channel monitor update.
4897 fn check_free_holding_cells(&self) -> bool {
4898 let mut has_monitor_update = false;
4899 let mut failed_htlcs = Vec::new();
4900 let mut handle_errors = Vec::new();
4902 let mut channel_state_lock = self.channel_state.lock().unwrap();
4903 let channel_state = &mut *channel_state_lock;
4904 let by_id = &mut channel_state.by_id;
4905 let short_to_id = &mut channel_state.short_to_id;
4906 let pending_msg_events = &mut channel_state.pending_msg_events;
4908 by_id.retain(|channel_id, chan| {
4909 match chan.maybe_free_holding_cell_htlcs(&self.logger) {
4910 Ok((commitment_opt, holding_cell_failed_htlcs)) => {
4911 if !holding_cell_failed_htlcs.is_empty() {
4912 failed_htlcs.push((holding_cell_failed_htlcs, *channel_id));
4914 if let Some((commitment_update, monitor_update)) = commitment_opt {
4915 if let Err(e) = self.chain_monitor.update_channel(chan.get_funding_txo().unwrap(), monitor_update) {
4916 has_monitor_update = true;
4917 let (res, close_channel) = handle_monitor_err!(self, e, short_to_id, chan, RAACommitmentOrder::CommitmentFirst, channel_id, COMMITMENT_UPDATE_ONLY);
4918 handle_errors.push((chan.get_counterparty_node_id(), res));
4919 if close_channel { return false; }
4921 pending_msg_events.push(events::MessageSendEvent::UpdateHTLCs {
4922 node_id: chan.get_counterparty_node_id(),
4923 updates: commitment_update,
4930 let (close_channel, res) = convert_chan_err!(self, e, short_to_id, chan, channel_id);
4931 handle_errors.push((chan.get_counterparty_node_id(), Err(res)));
4932 // ChannelClosed event is generated by handle_error for us
4939 let has_update = has_monitor_update || !failed_htlcs.is_empty() || !handle_errors.is_empty();
4940 for (failures, channel_id) in failed_htlcs.drain(..) {
4941 self.fail_holding_cell_htlcs(failures, channel_id);
4944 for (counterparty_node_id, err) in handle_errors.drain(..) {
4945 let _ = handle_error!(self, err, counterparty_node_id);
4951 /// Check whether any channels have finished removing all pending updates after a shutdown
4952 /// exchange and can now send a closing_signed.
4953 /// Returns whether any closing_signed messages were generated.
4954 fn maybe_generate_initial_closing_signed(&self) -> bool {
4955 let mut handle_errors: Vec<(PublicKey, Result<(), _>)> = Vec::new();
4956 let mut has_update = false;
4958 let mut channel_state_lock = self.channel_state.lock().unwrap();
4959 let channel_state = &mut *channel_state_lock;
4960 let by_id = &mut channel_state.by_id;
4961 let short_to_id = &mut channel_state.short_to_id;
4962 let pending_msg_events = &mut channel_state.pending_msg_events;
4964 by_id.retain(|channel_id, chan| {
4965 match chan.maybe_propose_closing_signed(&self.fee_estimator, &self.logger) {
4966 Ok((msg_opt, tx_opt)) => {
4967 if let Some(msg) = msg_opt {
4969 pending_msg_events.push(events::MessageSendEvent::SendClosingSigned {
4970 node_id: chan.get_counterparty_node_id(), msg,
4973 if let Some(tx) = tx_opt {
4974 // We're done with this channel. We got a closing_signed and sent back
4975 // a closing_signed with a closing transaction to broadcast.
4976 if let Ok(update) = self.get_channel_update_for_broadcast(&chan) {
4977 pending_msg_events.push(events::MessageSendEvent::BroadcastChannelUpdate {
4982 self.issue_channel_close_events(chan, ClosureReason::CooperativeClosure);
4984 log_info!(self.logger, "Broadcasting {}", log_tx!(tx));
4985 self.tx_broadcaster.broadcast_transaction(&tx);
4986 update_maps_on_chan_removal!(self, short_to_id, chan);
4992 let (close_channel, res) = convert_chan_err!(self, e, short_to_id, chan, channel_id);
4993 handle_errors.push((chan.get_counterparty_node_id(), Err(res)));
5000 for (counterparty_node_id, err) in handle_errors.drain(..) {
5001 let _ = handle_error!(self, err, counterparty_node_id);
5007 /// Handle a list of channel failures during a block_connected or block_disconnected call,
5008 /// pushing the channel monitor update (if any) to the background events queue and removing the
5010 fn handle_init_event_channel_failures(&self, mut failed_channels: Vec<ShutdownResult>) {
5011 for mut failure in failed_channels.drain(..) {
5012 // Either a commitment transactions has been confirmed on-chain or
5013 // Channel::block_disconnected detected that the funding transaction has been
5014 // reorganized out of the main chain.
5015 // We cannot broadcast our latest local state via monitor update (as
5016 // Channel::force_shutdown tries to make us do) as we may still be in initialization,
5017 // so we track the update internally and handle it when the user next calls
5018 // timer_tick_occurred, guaranteeing we're running normally.
5019 if let Some((funding_txo, update)) = failure.0.take() {
5020 assert_eq!(update.updates.len(), 1);
5021 if let ChannelMonitorUpdateStep::ChannelForceClosed { should_broadcast } = update.updates[0] {
5022 assert!(should_broadcast);
5023 } else { unreachable!(); }
5024 self.pending_background_events.lock().unwrap().push(BackgroundEvent::ClosingMonitorUpdate((funding_txo, update)));
5026 self.finish_force_close_channel(failure);
5030 fn set_payment_hash_secret_map(&self, payment_hash: PaymentHash, payment_preimage: Option<PaymentPreimage>, min_value_msat: Option<u64>, invoice_expiry_delta_secs: u32) -> Result<PaymentSecret, APIError> {
5031 assert!(invoice_expiry_delta_secs <= 60*60*24*365); // Sadly bitcoin timestamps are u32s, so panic before 2106
5033 if min_value_msat.is_some() && min_value_msat.unwrap() > MAX_VALUE_MSAT {
5034 return Err(APIError::APIMisuseError { err: format!("min_value_msat of {} greater than total 21 million bitcoin supply", min_value_msat.unwrap()) });
5037 let payment_secret = PaymentSecret(self.keys_manager.get_secure_random_bytes());
5039 let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self.total_consistency_lock, &self.persistence_notifier);
5040 let mut payment_secrets = self.pending_inbound_payments.lock().unwrap();
5041 match payment_secrets.entry(payment_hash) {
5042 hash_map::Entry::Vacant(e) => {
5043 e.insert(PendingInboundPayment {
5044 payment_secret, min_value_msat, payment_preimage,
5045 user_payment_id: 0, // For compatibility with version 0.0.103 and earlier
5046 // We assume that highest_seen_timestamp is pretty close to the current time -
5047 // it's updated when we receive a new block with the maximum time we've seen in
5048 // a header. It should never be more than two hours in the future.
5049 // Thus, we add two hours here as a buffer to ensure we absolutely
5050 // never fail a payment too early.
5051 // Note that we assume that received blocks have reasonably up-to-date
5053 expiry_time: self.highest_seen_timestamp.load(Ordering::Acquire) as u64 + invoice_expiry_delta_secs as u64 + 7200,
5056 hash_map::Entry::Occupied(_) => return Err(APIError::APIMisuseError { err: "Duplicate payment hash".to_owned() }),
5061 /// Gets a payment secret and payment hash for use in an invoice given to a third party wishing
5064 /// This differs from [`create_inbound_payment_for_hash`] only in that it generates the
5065 /// [`PaymentHash`] and [`PaymentPreimage`] for you.
5067 /// The [`PaymentPreimage`] will ultimately be returned to you in the [`PaymentReceived`], which
5068 /// will have the [`PaymentReceived::payment_preimage`] field filled in. That should then be
5069 /// passed directly to [`claim_funds`].
5071 /// See [`create_inbound_payment_for_hash`] for detailed documentation on behavior and requirements.
5073 /// Note that a malicious eavesdropper can intuit whether an inbound payment was created by
5074 /// `create_inbound_payment` or `create_inbound_payment_for_hash` based on runtime.
5078 /// If you register an inbound payment with this method, then serialize the `ChannelManager`, then
5079 /// deserialize it with a node running 0.0.103 and earlier, the payment will fail to be received.
5081 /// Errors if `min_value_msat` is greater than total bitcoin supply.
5083 /// [`claim_funds`]: Self::claim_funds
5084 /// [`PaymentReceived`]: events::Event::PaymentReceived
5085 /// [`PaymentReceived::payment_preimage`]: events::Event::PaymentReceived::payment_preimage
5086 /// [`create_inbound_payment_for_hash`]: Self::create_inbound_payment_for_hash
5087 pub fn create_inbound_payment(&self, min_value_msat: Option<u64>, invoice_expiry_delta_secs: u32) -> Result<(PaymentHash, PaymentSecret), ()> {
5088 inbound_payment::create(&self.inbound_payment_key, min_value_msat, invoice_expiry_delta_secs, &self.keys_manager, self.highest_seen_timestamp.load(Ordering::Acquire) as u64)
5091 /// Legacy version of [`create_inbound_payment`]. Use this method if you wish to share
5092 /// serialized state with LDK node(s) running 0.0.103 and earlier.
5094 /// May panic if `invoice_expiry_delta_secs` is greater than one year.
5097 /// This method is deprecated and will be removed soon.
5099 /// [`create_inbound_payment`]: Self::create_inbound_payment
5101 pub fn create_inbound_payment_legacy(&self, min_value_msat: Option<u64>, invoice_expiry_delta_secs: u32) -> Result<(PaymentHash, PaymentSecret), APIError> {
5102 let payment_preimage = PaymentPreimage(self.keys_manager.get_secure_random_bytes());
5103 let payment_hash = PaymentHash(Sha256::hash(&payment_preimage.0).into_inner());
5104 let payment_secret = self.set_payment_hash_secret_map(payment_hash, Some(payment_preimage), min_value_msat, invoice_expiry_delta_secs)?;
5105 Ok((payment_hash, payment_secret))
5108 /// Gets a [`PaymentSecret`] for a given [`PaymentHash`], for which the payment preimage is
5109 /// stored external to LDK.
5111 /// A [`PaymentReceived`] event will only be generated if the [`PaymentSecret`] matches a
5112 /// payment secret fetched via this method or [`create_inbound_payment`], and which is at least
5113 /// the `min_value_msat` provided here, if one is provided.
5115 /// The [`PaymentHash`] (and corresponding [`PaymentPreimage`]) should be globally unique, though
5116 /// note that LDK will not stop you from registering duplicate payment hashes for inbound
5119 /// `min_value_msat` should be set if the invoice being generated contains a value. Any payment
5120 /// received for the returned [`PaymentHash`] will be required to be at least `min_value_msat`
5121 /// before a [`PaymentReceived`] event will be generated, ensuring that we do not provide the
5122 /// sender "proof-of-payment" unless they have paid the required amount.
5124 /// `invoice_expiry_delta_secs` describes the number of seconds that the invoice is valid for
5125 /// in excess of the current time. This should roughly match the expiry time set in the invoice.
5126 /// After this many seconds, we will remove the inbound payment, resulting in any attempts to
5127 /// pay the invoice failing. The BOLT spec suggests 3,600 secs as a default validity time for
5128 /// invoices when no timeout is set.
5130 /// Note that we use block header time to time-out pending inbound payments (with some margin
5131 /// to compensate for the inaccuracy of block header timestamps). Thus, in practice we will
5132 /// accept a payment and generate a [`PaymentReceived`] event for some time after the expiry.
5133 /// If you need exact expiry semantics, you should enforce them upon receipt of
5134 /// [`PaymentReceived`].
5136 /// Note that invoices generated for inbound payments should have their `min_final_cltv_expiry`
5137 /// set to at least [`MIN_FINAL_CLTV_EXPIRY`].
5139 /// Note that a malicious eavesdropper can intuit whether an inbound payment was created by
5140 /// `create_inbound_payment` or `create_inbound_payment_for_hash` based on runtime.
5144 /// If you register an inbound payment with this method, then serialize the `ChannelManager`, then
5145 /// deserialize it with a node running 0.0.103 and earlier, the payment will fail to be received.
5147 /// Errors if `min_value_msat` is greater than total bitcoin supply.
5149 /// [`create_inbound_payment`]: Self::create_inbound_payment
5150 /// [`PaymentReceived`]: events::Event::PaymentReceived
5151 pub fn create_inbound_payment_for_hash(&self, payment_hash: PaymentHash, min_value_msat: Option<u64>, invoice_expiry_delta_secs: u32) -> Result<PaymentSecret, ()> {
5152 inbound_payment::create_from_hash(&self.inbound_payment_key, min_value_msat, payment_hash, invoice_expiry_delta_secs, self.highest_seen_timestamp.load(Ordering::Acquire) as u64)
5155 /// Legacy version of [`create_inbound_payment_for_hash`]. Use this method if you wish to share
5156 /// serialized state with LDK node(s) running 0.0.103 and earlier.
5158 /// May panic if `invoice_expiry_delta_secs` is greater than one year.
5161 /// This method is deprecated and will be removed soon.
5163 /// [`create_inbound_payment_for_hash`]: Self::create_inbound_payment_for_hash
5165 pub fn create_inbound_payment_for_hash_legacy(&self, payment_hash: PaymentHash, min_value_msat: Option<u64>, invoice_expiry_delta_secs: u32) -> Result<PaymentSecret, APIError> {
5166 self.set_payment_hash_secret_map(payment_hash, None, min_value_msat, invoice_expiry_delta_secs)
5169 /// Gets an LDK-generated payment preimage from a payment hash and payment secret that were
5170 /// previously returned from [`create_inbound_payment`].
5172 /// [`create_inbound_payment`]: Self::create_inbound_payment
5173 pub fn get_payment_preimage(&self, payment_hash: PaymentHash, payment_secret: PaymentSecret) -> Result<PaymentPreimage, APIError> {
5174 inbound_payment::get_payment_preimage(payment_hash, payment_secret, &self.inbound_payment_key)
5177 /// Gets a fake short channel id for use in receiving [phantom node payments]. These fake scids
5178 /// are used when constructing the phantom invoice's route hints.
5180 /// [phantom node payments]: crate::chain::keysinterface::PhantomKeysManager
5181 pub fn get_phantom_scid(&self) -> u64 {
5182 let mut channel_state = self.channel_state.lock().unwrap();
5183 let best_block = self.best_block.read().unwrap();
5185 let scid_candidate = fake_scid::Namespace::Phantom.get_fake_scid(best_block.height(), &self.genesis_hash, &self.fake_scid_rand_bytes, &self.keys_manager);
5186 // Ensure the generated scid doesn't conflict with a real channel.
5187 match channel_state.short_to_id.entry(scid_candidate) {
5188 hash_map::Entry::Occupied(_) => continue,
5189 hash_map::Entry::Vacant(_) => return scid_candidate
5194 /// Gets route hints for use in receiving [phantom node payments].
5196 /// [phantom node payments]: crate::chain::keysinterface::PhantomKeysManager
5197 pub fn get_phantom_route_hints(&self) -> PhantomRouteHints {
5199 channels: self.list_usable_channels(),
5200 phantom_scid: self.get_phantom_scid(),
5201 real_node_pubkey: self.get_our_node_id(),
5205 #[cfg(any(test, fuzzing, feature = "_test_utils"))]
5206 pub fn get_and_clear_pending_events(&self) -> Vec<events::Event> {
5207 let events = core::cell::RefCell::new(Vec::new());
5208 let event_handler = |event: &events::Event| events.borrow_mut().push(event.clone());
5209 self.process_pending_events(&event_handler);
5214 pub fn has_pending_payments(&self) -> bool {
5215 !self.pending_outbound_payments.lock().unwrap().is_empty()
5219 pub fn clear_pending_payments(&self) {
5220 self.pending_outbound_payments.lock().unwrap().clear()
5224 impl<Signer: Sign, M: Deref, T: Deref, K: Deref, F: Deref, L: Deref> MessageSendEventsProvider for ChannelManager<Signer, M, T, K, F, L>
5225 where M::Target: chain::Watch<Signer>,
5226 T::Target: BroadcasterInterface,
5227 K::Target: KeysInterface<Signer = Signer>,
5228 F::Target: FeeEstimator,
5231 fn get_and_clear_pending_msg_events(&self) -> Vec<MessageSendEvent> {
5232 let events = RefCell::new(Vec::new());
5233 PersistenceNotifierGuard::optionally_notify(&self.total_consistency_lock, &self.persistence_notifier, || {
5234 let mut result = NotifyOption::SkipPersist;
5236 // TODO: This behavior should be documented. It's unintuitive that we query
5237 // ChannelMonitors when clearing other events.
5238 if self.process_pending_monitor_events() {
5239 result = NotifyOption::DoPersist;
5242 if self.check_free_holding_cells() {
5243 result = NotifyOption::DoPersist;
5245 if self.maybe_generate_initial_closing_signed() {
5246 result = NotifyOption::DoPersist;
5249 let mut pending_events = Vec::new();
5250 let mut channel_state = self.channel_state.lock().unwrap();
5251 mem::swap(&mut pending_events, &mut channel_state.pending_msg_events);
5253 if !pending_events.is_empty() {
5254 events.replace(pending_events);
5263 impl<Signer: Sign, M: Deref, T: Deref, K: Deref, F: Deref, L: Deref> EventsProvider for ChannelManager<Signer, M, T, K, F, L>
5265 M::Target: chain::Watch<Signer>,
5266 T::Target: BroadcasterInterface,
5267 K::Target: KeysInterface<Signer = Signer>,
5268 F::Target: FeeEstimator,
5271 /// Processes events that must be periodically handled.
5273 /// An [`EventHandler`] may safely call back to the provider in order to handle an event.
5274 /// However, it must not call [`Writeable::write`] as doing so would result in a deadlock.
5276 /// Pending events are persisted as part of [`ChannelManager`]. While these events are cleared
5277 /// when processed, an [`EventHandler`] must be able to handle previously seen events when
5278 /// restarting from an old state.
5279 fn process_pending_events<H: Deref>(&self, handler: H) where H::Target: EventHandler {
5280 PersistenceNotifierGuard::optionally_notify(&self.total_consistency_lock, &self.persistence_notifier, || {
5281 let mut result = NotifyOption::SkipPersist;
5283 // TODO: This behavior should be documented. It's unintuitive that we query
5284 // ChannelMonitors when clearing other events.
5285 if self.process_pending_monitor_events() {
5286 result = NotifyOption::DoPersist;
5289 let mut pending_events = mem::replace(&mut *self.pending_events.lock().unwrap(), vec![]);
5290 if !pending_events.is_empty() {
5291 result = NotifyOption::DoPersist;
5294 for event in pending_events.drain(..) {
5295 handler.handle_event(&event);
5303 impl<Signer: Sign, M: Deref, T: Deref, K: Deref, F: Deref, L: Deref> chain::Listen for ChannelManager<Signer, M, T, K, F, L>
5305 M::Target: chain::Watch<Signer>,
5306 T::Target: BroadcasterInterface,
5307 K::Target: KeysInterface<Signer = Signer>,
5308 F::Target: FeeEstimator,
5311 fn filtered_block_connected(&self, header: &BlockHeader, txdata: &TransactionData, height: u32) {
5313 let best_block = self.best_block.read().unwrap();
5314 assert_eq!(best_block.block_hash(), header.prev_blockhash,
5315 "Blocks must be connected in chain-order - the connected header must build on the last connected header");
5316 assert_eq!(best_block.height(), height - 1,
5317 "Blocks must be connected in chain-order - the connected block height must be one greater than the previous height");
5320 self.transactions_confirmed(header, txdata, height);
5321 self.best_block_updated(header, height);
5324 fn block_disconnected(&self, header: &BlockHeader, height: u32) {
5325 let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self.total_consistency_lock, &self.persistence_notifier);
5326 let new_height = height - 1;
5328 let mut best_block = self.best_block.write().unwrap();
5329 assert_eq!(best_block.block_hash(), header.block_hash(),
5330 "Blocks must be disconnected in chain-order - the disconnected header must be the last connected header");
5331 assert_eq!(best_block.height(), height,
5332 "Blocks must be disconnected in chain-order - the disconnected block must have the correct height");
5333 *best_block = BestBlock::new(header.prev_blockhash, new_height)
5336 self.do_chain_event(Some(new_height), |channel| channel.best_block_updated(new_height, header.time, self.genesis_hash.clone(), self.get_our_node_id(), &self.logger));
5340 impl<Signer: Sign, M: Deref, T: Deref, K: Deref, F: Deref, L: Deref> chain::Confirm for ChannelManager<Signer, M, T, K, F, L>
5342 M::Target: chain::Watch<Signer>,
5343 T::Target: BroadcasterInterface,
5344 K::Target: KeysInterface<Signer = Signer>,
5345 F::Target: FeeEstimator,
5348 fn transactions_confirmed(&self, header: &BlockHeader, txdata: &TransactionData, height: u32) {
5349 // Note that we MUST NOT end up calling methods on self.chain_monitor here - we're called
5350 // during initialization prior to the chain_monitor being fully configured in some cases.
5351 // See the docs for `ChannelManagerReadArgs` for more.
5353 let block_hash = header.block_hash();
5354 log_trace!(self.logger, "{} transactions included in block {} at height {} provided", txdata.len(), block_hash, height);
5356 let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self.total_consistency_lock, &self.persistence_notifier);
5357 self.do_chain_event(Some(height), |channel| channel.transactions_confirmed(&block_hash, height, txdata, self.genesis_hash.clone(), self.get_our_node_id(), &self.logger)
5358 .map(|(a, b)| (a, Vec::new(), b)));
5360 let last_best_block_height = self.best_block.read().unwrap().height();
5361 if height < last_best_block_height {
5362 let timestamp = self.highest_seen_timestamp.load(Ordering::Acquire);
5363 self.do_chain_event(Some(last_best_block_height), |channel| channel.best_block_updated(last_best_block_height, timestamp as u32, self.genesis_hash.clone(), self.get_our_node_id(), &self.logger));
5367 fn best_block_updated(&self, header: &BlockHeader, height: u32) {
5368 // Note that we MUST NOT end up calling methods on self.chain_monitor here - we're called
5369 // during initialization prior to the chain_monitor being fully configured in some cases.
5370 // See the docs for `ChannelManagerReadArgs` for more.
5372 let block_hash = header.block_hash();
5373 log_trace!(self.logger, "New best block: {} at height {}", block_hash, height);
5375 let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self.total_consistency_lock, &self.persistence_notifier);
5377 *self.best_block.write().unwrap() = BestBlock::new(block_hash, height);
5379 self.do_chain_event(Some(height), |channel| channel.best_block_updated(height, header.time, self.genesis_hash.clone(), self.get_our_node_id(), &self.logger));
5381 macro_rules! max_time {
5382 ($timestamp: expr) => {
5384 // Update $timestamp to be the max of its current value and the block
5385 // timestamp. This should keep us close to the current time without relying on
5386 // having an explicit local time source.
5387 // Just in case we end up in a race, we loop until we either successfully
5388 // update $timestamp or decide we don't need to.
5389 let old_serial = $timestamp.load(Ordering::Acquire);
5390 if old_serial >= header.time as usize { break; }
5391 if $timestamp.compare_exchange(old_serial, header.time as usize, Ordering::AcqRel, Ordering::Relaxed).is_ok() {
5397 max_time!(self.last_node_announcement_serial);
5398 max_time!(self.highest_seen_timestamp);
5399 let mut payment_secrets = self.pending_inbound_payments.lock().unwrap();
5400 payment_secrets.retain(|_, inbound_payment| {
5401 inbound_payment.expiry_time > header.time as u64
5404 let mut outbounds = self.pending_outbound_payments.lock().unwrap();
5405 let mut pending_events = self.pending_events.lock().unwrap();
5406 outbounds.retain(|payment_id, payment| {
5407 if payment.remaining_parts() != 0 { return true }
5408 if let PendingOutboundPayment::Retryable { starting_block_height, payment_hash, .. } = payment {
5409 if *starting_block_height + PAYMENT_EXPIRY_BLOCKS <= height {
5410 log_info!(self.logger, "Timing out payment with id {} and hash {}", log_bytes!(payment_id.0), log_bytes!(payment_hash.0));
5411 pending_events.push(events::Event::PaymentFailed {
5412 payment_id: *payment_id, payment_hash: *payment_hash,
5420 fn get_relevant_txids(&self) -> Vec<Txid> {
5421 let channel_state = self.channel_state.lock().unwrap();
5422 let mut res = Vec::with_capacity(channel_state.short_to_id.len());
5423 for chan in channel_state.by_id.values() {
5424 if let Some(funding_txo) = chan.get_funding_txo() {
5425 res.push(funding_txo.txid);
5431 fn transaction_unconfirmed(&self, txid: &Txid) {
5432 let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self.total_consistency_lock, &self.persistence_notifier);
5433 self.do_chain_event(None, |channel| {
5434 if let Some(funding_txo) = channel.get_funding_txo() {
5435 if funding_txo.txid == *txid {
5436 channel.funding_transaction_unconfirmed(&self.logger).map(|()| (None, Vec::new(), None))
5437 } else { Ok((None, Vec::new(), None)) }
5438 } else { Ok((None, Vec::new(), None)) }
5443 impl<Signer: Sign, M: Deref, T: Deref, K: Deref, F: Deref, L: Deref> ChannelManager<Signer, M, T, K, F, L>
5445 M::Target: chain::Watch<Signer>,
5446 T::Target: BroadcasterInterface,
5447 K::Target: KeysInterface<Signer = Signer>,
5448 F::Target: FeeEstimator,
5451 /// Calls a function which handles an on-chain event (blocks dis/connected, transactions
5452 /// un/confirmed, etc) on each channel, handling any resulting errors or messages generated by
5454 fn do_chain_event<FN: Fn(&mut Channel<Signer>) -> Result<(Option<msgs::FundingLocked>, Vec<(HTLCSource, PaymentHash)>, Option<msgs::AnnouncementSignatures>), ClosureReason>>
5455 (&self, height_opt: Option<u32>, f: FN) {
5456 // Note that we MUST NOT end up calling methods on self.chain_monitor here - we're called
5457 // during initialization prior to the chain_monitor being fully configured in some cases.
5458 // See the docs for `ChannelManagerReadArgs` for more.
5460 let mut failed_channels = Vec::new();
5461 let mut timed_out_htlcs = Vec::new();
5463 let mut channel_lock = self.channel_state.lock().unwrap();
5464 let channel_state = &mut *channel_lock;
5465 let short_to_id = &mut channel_state.short_to_id;
5466 let pending_msg_events = &mut channel_state.pending_msg_events;
5467 channel_state.by_id.retain(|_, channel| {
5468 let res = f(channel);
5469 if let Ok((funding_locked_opt, mut timed_out_pending_htlcs, announcement_sigs)) = res {
5470 for (source, payment_hash) in timed_out_pending_htlcs.drain(..) {
5471 let (failure_code, data) = self.get_htlc_inbound_temp_fail_err_and_data(0x1000|14 /* expiry_too_soon */, &channel);
5472 timed_out_htlcs.push((source, payment_hash, HTLCFailReason::Reason {
5476 if let Some(funding_locked) = funding_locked_opt {
5477 send_funding_locked!(short_to_id, pending_msg_events, channel, funding_locked);
5478 if channel.is_usable() {
5479 log_trace!(self.logger, "Sending funding_locked with private initial channel_update for our counterparty on channel {}", log_bytes!(channel.channel_id()));
5480 if let Ok(msg) = self.get_channel_update_for_unicast(channel) {
5481 pending_msg_events.push(events::MessageSendEvent::SendChannelUpdate {
5482 node_id: channel.get_counterparty_node_id(),
5487 log_trace!(self.logger, "Sending funding_locked WITHOUT channel_update for {}", log_bytes!(channel.channel_id()));
5490 if let Some(announcement_sigs) = announcement_sigs {
5491 log_trace!(self.logger, "Sending announcement_signatures for channel {}", log_bytes!(channel.channel_id()));
5492 pending_msg_events.push(events::MessageSendEvent::SendAnnouncementSignatures {
5493 node_id: channel.get_counterparty_node_id(),
5494 msg: announcement_sigs,
5496 if let Some(height) = height_opt {
5497 if let Some(announcement) = channel.get_signed_channel_announcement(self.get_our_node_id(), self.genesis_hash, height) {
5498 pending_msg_events.push(events::MessageSendEvent::BroadcastChannelAnnouncement {
5500 // Note that announcement_signatures fails if the channel cannot be announced,
5501 // so get_channel_update_for_broadcast will never fail by the time we get here.
5502 update_msg: self.get_channel_update_for_broadcast(channel).unwrap(),
5507 } else if let Err(reason) = res {
5508 update_maps_on_chan_removal!(self, short_to_id, channel);
5509 // It looks like our counterparty went on-chain or funding transaction was
5510 // reorged out of the main chain. Close the channel.
5511 failed_channels.push(channel.force_shutdown(true));
5512 if let Ok(update) = self.get_channel_update_for_broadcast(&channel) {
5513 pending_msg_events.push(events::MessageSendEvent::BroadcastChannelUpdate {
5517 let reason_message = format!("{}", reason);
5518 self.issue_channel_close_events(channel, reason);
5519 pending_msg_events.push(events::MessageSendEvent::HandleError {
5520 node_id: channel.get_counterparty_node_id(),
5521 action: msgs::ErrorAction::SendErrorMessage { msg: msgs::ErrorMessage {
5522 channel_id: channel.channel_id(),
5523 data: reason_message,
5531 if let Some(height) = height_opt {
5532 channel_state.claimable_htlcs.retain(|payment_hash, htlcs| {
5533 htlcs.retain(|htlc| {
5534 // If height is approaching the number of blocks we think it takes us to get
5535 // our commitment transaction confirmed before the HTLC expires, plus the
5536 // number of blocks we generally consider it to take to do a commitment update,
5537 // just give up on it and fail the HTLC.
5538 if height >= htlc.cltv_expiry - HTLC_FAIL_BACK_BUFFER {
5539 let mut htlc_msat_height_data = byte_utils::be64_to_array(htlc.value).to_vec();
5540 htlc_msat_height_data.extend_from_slice(&byte_utils::be32_to_array(height));
5541 timed_out_htlcs.push((HTLCSource::PreviousHopData(htlc.prev_hop.clone()), payment_hash.clone(), HTLCFailReason::Reason {
5542 failure_code: 0x4000 | 15,
5543 data: htlc_msat_height_data
5548 !htlcs.is_empty() // Only retain this entry if htlcs has at least one entry.
5553 self.handle_init_event_channel_failures(failed_channels);
5555 for (source, payment_hash, reason) in timed_out_htlcs.drain(..) {
5556 self.fail_htlc_backwards_internal(self.channel_state.lock().unwrap(), source, &payment_hash, reason);
5560 /// Blocks until ChannelManager needs to be persisted or a timeout is reached. It returns a bool
5561 /// indicating whether persistence is necessary. Only one listener on
5562 /// `await_persistable_update` or `await_persistable_update_timeout` is guaranteed to be woken
5565 /// Note that this method is not available with the `no-std` feature.
5566 #[cfg(any(test, feature = "std"))]
5567 pub fn await_persistable_update_timeout(&self, max_wait: Duration) -> bool {
5568 self.persistence_notifier.wait_timeout(max_wait)
5571 /// Blocks until ChannelManager needs to be persisted. Only one listener on
5572 /// `await_persistable_update` or `await_persistable_update_timeout` is guaranteed to be woken
5574 pub fn await_persistable_update(&self) {
5575 self.persistence_notifier.wait()
5578 #[cfg(any(test, feature = "_test_utils"))]
5579 pub fn get_persistence_condvar_value(&self) -> bool {
5580 let mutcond = &self.persistence_notifier.persistence_lock;
5581 let &(ref mtx, _) = mutcond;
5582 let guard = mtx.lock().unwrap();
5586 /// Gets the latest best block which was connected either via the [`chain::Listen`] or
5587 /// [`chain::Confirm`] interfaces.
5588 pub fn current_best_block(&self) -> BestBlock {
5589 self.best_block.read().unwrap().clone()
5593 impl<Signer: Sign, M: Deref , T: Deref , K: Deref , F: Deref , L: Deref >
5594 ChannelMessageHandler for ChannelManager<Signer, M, T, K, F, L>
5595 where M::Target: chain::Watch<Signer>,
5596 T::Target: BroadcasterInterface,
5597 K::Target: KeysInterface<Signer = Signer>,
5598 F::Target: FeeEstimator,
5601 fn handle_open_channel(&self, counterparty_node_id: &PublicKey, their_features: InitFeatures, msg: &msgs::OpenChannel) {
5602 let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self.total_consistency_lock, &self.persistence_notifier);
5603 let _ = handle_error!(self, self.internal_open_channel(counterparty_node_id, their_features, msg), *counterparty_node_id);
5606 fn handle_accept_channel(&self, counterparty_node_id: &PublicKey, their_features: InitFeatures, msg: &msgs::AcceptChannel) {
5607 let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self.total_consistency_lock, &self.persistence_notifier);
5608 let _ = handle_error!(self, self.internal_accept_channel(counterparty_node_id, their_features, msg), *counterparty_node_id);
5611 fn handle_funding_created(&self, counterparty_node_id: &PublicKey, msg: &msgs::FundingCreated) {
5612 let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self.total_consistency_lock, &self.persistence_notifier);
5613 let _ = handle_error!(self, self.internal_funding_created(counterparty_node_id, msg), *counterparty_node_id);
5616 fn handle_funding_signed(&self, counterparty_node_id: &PublicKey, msg: &msgs::FundingSigned) {
5617 let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self.total_consistency_lock, &self.persistence_notifier);
5618 let _ = handle_error!(self, self.internal_funding_signed(counterparty_node_id, msg), *counterparty_node_id);
5621 fn handle_funding_locked(&self, counterparty_node_id: &PublicKey, msg: &msgs::FundingLocked) {
5622 let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self.total_consistency_lock, &self.persistence_notifier);
5623 let _ = handle_error!(self, self.internal_funding_locked(counterparty_node_id, msg), *counterparty_node_id);
5626 fn handle_shutdown(&self, counterparty_node_id: &PublicKey, their_features: &InitFeatures, msg: &msgs::Shutdown) {
5627 let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self.total_consistency_lock, &self.persistence_notifier);
5628 let _ = handle_error!(self, self.internal_shutdown(counterparty_node_id, their_features, msg), *counterparty_node_id);
5631 fn handle_closing_signed(&self, counterparty_node_id: &PublicKey, msg: &msgs::ClosingSigned) {
5632 let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self.total_consistency_lock, &self.persistence_notifier);
5633 let _ = handle_error!(self, self.internal_closing_signed(counterparty_node_id, msg), *counterparty_node_id);
5636 fn handle_update_add_htlc(&self, counterparty_node_id: &PublicKey, msg: &msgs::UpdateAddHTLC) {
5637 let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self.total_consistency_lock, &self.persistence_notifier);
5638 let _ = handle_error!(self, self.internal_update_add_htlc(counterparty_node_id, msg), *counterparty_node_id);
5641 fn handle_update_fulfill_htlc(&self, counterparty_node_id: &PublicKey, msg: &msgs::UpdateFulfillHTLC) {
5642 let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self.total_consistency_lock, &self.persistence_notifier);
5643 let _ = handle_error!(self, self.internal_update_fulfill_htlc(counterparty_node_id, msg), *counterparty_node_id);
5646 fn handle_update_fail_htlc(&self, counterparty_node_id: &PublicKey, msg: &msgs::UpdateFailHTLC) {
5647 let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self.total_consistency_lock, &self.persistence_notifier);
5648 let _ = handle_error!(self, self.internal_update_fail_htlc(counterparty_node_id, msg), *counterparty_node_id);
5651 fn handle_update_fail_malformed_htlc(&self, counterparty_node_id: &PublicKey, msg: &msgs::UpdateFailMalformedHTLC) {
5652 let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self.total_consistency_lock, &self.persistence_notifier);
5653 let _ = handle_error!(self, self.internal_update_fail_malformed_htlc(counterparty_node_id, msg), *counterparty_node_id);
5656 fn handle_commitment_signed(&self, counterparty_node_id: &PublicKey, msg: &msgs::CommitmentSigned) {
5657 let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self.total_consistency_lock, &self.persistence_notifier);
5658 let _ = handle_error!(self, self.internal_commitment_signed(counterparty_node_id, msg), *counterparty_node_id);
5661 fn handle_revoke_and_ack(&self, counterparty_node_id: &PublicKey, msg: &msgs::RevokeAndACK) {
5662 let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self.total_consistency_lock, &self.persistence_notifier);
5663 let _ = handle_error!(self, self.internal_revoke_and_ack(counterparty_node_id, msg), *counterparty_node_id);
5666 fn handle_update_fee(&self, counterparty_node_id: &PublicKey, msg: &msgs::UpdateFee) {
5667 let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self.total_consistency_lock, &self.persistence_notifier);
5668 let _ = handle_error!(self, self.internal_update_fee(counterparty_node_id, msg), *counterparty_node_id);
5671 fn handle_announcement_signatures(&self, counterparty_node_id: &PublicKey, msg: &msgs::AnnouncementSignatures) {
5672 let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self.total_consistency_lock, &self.persistence_notifier);
5673 let _ = handle_error!(self, self.internal_announcement_signatures(counterparty_node_id, msg), *counterparty_node_id);
5676 fn handle_channel_update(&self, counterparty_node_id: &PublicKey, msg: &msgs::ChannelUpdate) {
5677 PersistenceNotifierGuard::optionally_notify(&self.total_consistency_lock, &self.persistence_notifier, || {
5678 if let Ok(persist) = handle_error!(self, self.internal_channel_update(counterparty_node_id, msg), *counterparty_node_id) {
5681 NotifyOption::SkipPersist
5686 fn handle_channel_reestablish(&self, counterparty_node_id: &PublicKey, msg: &msgs::ChannelReestablish) {
5687 let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self.total_consistency_lock, &self.persistence_notifier);
5688 let _ = handle_error!(self, self.internal_channel_reestablish(counterparty_node_id, msg), *counterparty_node_id);
5691 fn peer_disconnected(&self, counterparty_node_id: &PublicKey, no_connection_possible: bool) {
5692 let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self.total_consistency_lock, &self.persistence_notifier);
5693 let mut failed_channels = Vec::new();
5694 let mut no_channels_remain = true;
5696 let mut channel_state_lock = self.channel_state.lock().unwrap();
5697 let channel_state = &mut *channel_state_lock;
5698 let pending_msg_events = &mut channel_state.pending_msg_events;
5699 let short_to_id = &mut channel_state.short_to_id;
5700 if no_connection_possible {
5701 log_debug!(self.logger, "Failing all channels with {} due to no_connection_possible", log_pubkey!(counterparty_node_id));
5702 channel_state.by_id.retain(|_, chan| {
5703 if chan.get_counterparty_node_id() == *counterparty_node_id {
5704 update_maps_on_chan_removal!(self, short_to_id, chan);
5705 failed_channels.push(chan.force_shutdown(true));
5706 if let Ok(update) = self.get_channel_update_for_broadcast(&chan) {
5707 pending_msg_events.push(events::MessageSendEvent::BroadcastChannelUpdate {
5711 self.issue_channel_close_events(chan, ClosureReason::DisconnectedPeer);
5718 log_debug!(self.logger, "Marking channels with {} disconnected and generating channel_updates", log_pubkey!(counterparty_node_id));
5719 channel_state.by_id.retain(|_, chan| {
5720 if chan.get_counterparty_node_id() == *counterparty_node_id {
5721 chan.remove_uncommitted_htlcs_and_mark_paused(&self.logger);
5722 if chan.is_shutdown() {
5723 update_maps_on_chan_removal!(self, short_to_id, chan);
5724 self.issue_channel_close_events(chan, ClosureReason::DisconnectedPeer);
5727 no_channels_remain = false;
5733 pending_msg_events.retain(|msg| {
5735 &events::MessageSendEvent::SendAcceptChannel { ref node_id, .. } => node_id != counterparty_node_id,
5736 &events::MessageSendEvent::SendOpenChannel { ref node_id, .. } => node_id != counterparty_node_id,
5737 &events::MessageSendEvent::SendFundingCreated { ref node_id, .. } => node_id != counterparty_node_id,
5738 &events::MessageSendEvent::SendFundingSigned { ref node_id, .. } => node_id != counterparty_node_id,
5739 &events::MessageSendEvent::SendFundingLocked { ref node_id, .. } => node_id != counterparty_node_id,
5740 &events::MessageSendEvent::SendAnnouncementSignatures { ref node_id, .. } => node_id != counterparty_node_id,
5741 &events::MessageSendEvent::UpdateHTLCs { ref node_id, .. } => node_id != counterparty_node_id,
5742 &events::MessageSendEvent::SendRevokeAndACK { ref node_id, .. } => node_id != counterparty_node_id,
5743 &events::MessageSendEvent::SendClosingSigned { ref node_id, .. } => node_id != counterparty_node_id,
5744 &events::MessageSendEvent::SendShutdown { ref node_id, .. } => node_id != counterparty_node_id,
5745 &events::MessageSendEvent::SendChannelReestablish { ref node_id, .. } => node_id != counterparty_node_id,
5746 &events::MessageSendEvent::BroadcastChannelAnnouncement { .. } => true,
5747 &events::MessageSendEvent::BroadcastNodeAnnouncement { .. } => true,
5748 &events::MessageSendEvent::BroadcastChannelUpdate { .. } => true,
5749 &events::MessageSendEvent::SendChannelUpdate { ref node_id, .. } => node_id != counterparty_node_id,
5750 &events::MessageSendEvent::HandleError { ref node_id, .. } => node_id != counterparty_node_id,
5751 &events::MessageSendEvent::SendChannelRangeQuery { .. } => false,
5752 &events::MessageSendEvent::SendShortIdsQuery { .. } => false,
5753 &events::MessageSendEvent::SendReplyChannelRange { .. } => false,
5754 &events::MessageSendEvent::SendGossipTimestampFilter { .. } => false,
5758 if no_channels_remain {
5759 self.per_peer_state.write().unwrap().remove(counterparty_node_id);
5762 for failure in failed_channels.drain(..) {
5763 self.finish_force_close_channel(failure);
5767 fn peer_connected(&self, counterparty_node_id: &PublicKey, init_msg: &msgs::Init) {
5768 log_debug!(self.logger, "Generating channel_reestablish events for {}", log_pubkey!(counterparty_node_id));
5770 let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self.total_consistency_lock, &self.persistence_notifier);
5773 let mut peer_state_lock = self.per_peer_state.write().unwrap();
5774 match peer_state_lock.entry(counterparty_node_id.clone()) {
5775 hash_map::Entry::Vacant(e) => {
5776 e.insert(Mutex::new(PeerState {
5777 latest_features: init_msg.features.clone(),
5780 hash_map::Entry::Occupied(e) => {
5781 e.get().lock().unwrap().latest_features = init_msg.features.clone();
5786 let mut channel_state_lock = self.channel_state.lock().unwrap();
5787 let channel_state = &mut *channel_state_lock;
5788 let pending_msg_events = &mut channel_state.pending_msg_events;
5789 channel_state.by_id.retain(|_, chan| {
5790 if chan.get_counterparty_node_id() == *counterparty_node_id {
5791 if !chan.have_received_message() {
5792 // If we created this (outbound) channel while we were disconnected from the
5793 // peer we probably failed to send the open_channel message, which is now
5794 // lost. We can't have had anything pending related to this channel, so we just
5798 pending_msg_events.push(events::MessageSendEvent::SendChannelReestablish {
5799 node_id: chan.get_counterparty_node_id(),
5800 msg: chan.get_channel_reestablish(&self.logger),
5806 //TODO: Also re-broadcast announcement_signatures
5809 fn handle_error(&self, counterparty_node_id: &PublicKey, msg: &msgs::ErrorMessage) {
5810 let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self.total_consistency_lock, &self.persistence_notifier);
5812 if msg.channel_id == [0; 32] {
5813 for chan in self.list_channels() {
5814 if chan.counterparty.node_id == *counterparty_node_id {
5815 // Untrusted messages from peer, we throw away the error if id points to a non-existent channel
5816 let _ = self.force_close_channel_with_peer(&chan.channel_id, Some(counterparty_node_id), Some(&msg.data));
5821 // First check if we can advance the channel type and try again.
5822 let mut channel_state = self.channel_state.lock().unwrap();
5823 if let Some(chan) = channel_state.by_id.get_mut(&msg.channel_id) {
5824 if chan.get_counterparty_node_id() != *counterparty_node_id {
5827 if let Ok(msg) = chan.maybe_handle_error_without_close(self.genesis_hash) {
5828 channel_state.pending_msg_events.push(events::MessageSendEvent::SendOpenChannel {
5829 node_id: *counterparty_node_id,
5837 // Untrusted messages from peer, we throw away the error if id points to a non-existent channel
5838 let _ = self.force_close_channel_with_peer(&msg.channel_id, Some(counterparty_node_id), Some(&msg.data));
5843 /// Used to signal to the ChannelManager persister that the manager needs to be re-persisted to
5844 /// disk/backups, through `await_persistable_update_timeout` and `await_persistable_update`.
5845 struct PersistenceNotifier {
5846 /// Users won't access the persistence_lock directly, but rather wait on its bool using
5847 /// `wait_timeout` and `wait`.
5848 persistence_lock: (Mutex<bool>, Condvar),
5851 impl PersistenceNotifier {
5854 persistence_lock: (Mutex::new(false), Condvar::new()),
5860 let &(ref mtx, ref cvar) = &self.persistence_lock;
5861 let mut guard = mtx.lock().unwrap();
5866 guard = cvar.wait(guard).unwrap();
5867 let result = *guard;
5875 #[cfg(any(test, feature = "std"))]
5876 fn wait_timeout(&self, max_wait: Duration) -> bool {
5877 let current_time = Instant::now();
5879 let &(ref mtx, ref cvar) = &self.persistence_lock;
5880 let mut guard = mtx.lock().unwrap();
5885 guard = cvar.wait_timeout(guard, max_wait).unwrap().0;
5886 // Due to spurious wakeups that can happen on `wait_timeout`, here we need to check if the
5887 // desired wait time has actually passed, and if not then restart the loop with a reduced wait
5888 // time. Note that this logic can be highly simplified through the use of
5889 // `Condvar::wait_while` and `Condvar::wait_timeout_while`, if and when our MSRV is raised to
5891 let elapsed = current_time.elapsed();
5892 let result = *guard;
5893 if result || elapsed >= max_wait {
5897 match max_wait.checked_sub(elapsed) {
5898 None => return result,
5904 // Signal to the ChannelManager persister that there are updates necessitating persisting to disk.
5906 let &(ref persist_mtx, ref cnd) = &self.persistence_lock;
5907 let mut persistence_lock = persist_mtx.lock().unwrap();
5908 *persistence_lock = true;
5909 mem::drop(persistence_lock);
5914 const SERIALIZATION_VERSION: u8 = 1;
5915 const MIN_SERIALIZATION_VERSION: u8 = 1;
5917 impl_writeable_tlv_based!(CounterpartyForwardingInfo, {
5918 (2, fee_base_msat, required),
5919 (4, fee_proportional_millionths, required),
5920 (6, cltv_expiry_delta, required),
5923 impl_writeable_tlv_based!(ChannelCounterparty, {
5924 (2, node_id, required),
5925 (4, features, required),
5926 (6, unspendable_punishment_reserve, required),
5927 (8, forwarding_info, option),
5928 (9, outbound_htlc_minimum_msat, option),
5929 (11, outbound_htlc_maximum_msat, option),
5932 impl_writeable_tlv_based!(ChannelDetails, {
5933 (1, inbound_scid_alias, option),
5934 (2, channel_id, required),
5935 (3, channel_type, option),
5936 (4, counterparty, required),
5937 (6, funding_txo, option),
5938 (8, short_channel_id, option),
5939 (10, channel_value_satoshis, required),
5940 (12, unspendable_punishment_reserve, option),
5941 (14, user_channel_id, required),
5942 (16, balance_msat, required),
5943 (18, outbound_capacity_msat, required),
5944 // Note that by the time we get past the required read above, outbound_capacity_msat will be
5945 // filled in, so we can safely unwrap it here.
5946 (19, next_outbound_htlc_limit_msat, (default_value, outbound_capacity_msat.0.unwrap())),
5947 (20, inbound_capacity_msat, required),
5948 (22, confirmations_required, option),
5949 (24, force_close_spend_delay, option),
5950 (26, is_outbound, required),
5951 (28, is_funding_locked, required),
5952 (30, is_usable, required),
5953 (32, is_public, required),
5954 (33, inbound_htlc_minimum_msat, option),
5955 (35, inbound_htlc_maximum_msat, option),
5958 impl_writeable_tlv_based!(PhantomRouteHints, {
5959 (2, channels, vec_type),
5960 (4, phantom_scid, required),
5961 (6, real_node_pubkey, required),
5964 impl_writeable_tlv_based_enum!(PendingHTLCRouting,
5966 (0, onion_packet, required),
5967 (2, short_channel_id, required),
5970 (0, payment_data, required),
5971 (1, phantom_shared_secret, option),
5972 (2, incoming_cltv_expiry, required),
5974 (2, ReceiveKeysend) => {
5975 (0, payment_preimage, required),
5976 (2, incoming_cltv_expiry, required),
5980 impl_writeable_tlv_based!(PendingHTLCInfo, {
5981 (0, routing, required),
5982 (2, incoming_shared_secret, required),
5983 (4, payment_hash, required),
5984 (6, amt_to_forward, required),
5985 (8, outgoing_cltv_value, required)
5989 impl Writeable for HTLCFailureMsg {
5990 fn write<W: Writer>(&self, writer: &mut W) -> Result<(), io::Error> {
5992 HTLCFailureMsg::Relay(msgs::UpdateFailHTLC { channel_id, htlc_id, reason }) => {
5994 channel_id.write(writer)?;
5995 htlc_id.write(writer)?;
5996 reason.write(writer)?;
5998 HTLCFailureMsg::Malformed(msgs::UpdateFailMalformedHTLC {
5999 channel_id, htlc_id, sha256_of_onion, failure_code
6002 channel_id.write(writer)?;
6003 htlc_id.write(writer)?;
6004 sha256_of_onion.write(writer)?;
6005 failure_code.write(writer)?;
6012 impl Readable for HTLCFailureMsg {
6013 fn read<R: Read>(reader: &mut R) -> Result<Self, DecodeError> {
6014 let id: u8 = Readable::read(reader)?;
6017 Ok(HTLCFailureMsg::Relay(msgs::UpdateFailHTLC {
6018 channel_id: Readable::read(reader)?,
6019 htlc_id: Readable::read(reader)?,
6020 reason: Readable::read(reader)?,
6024 Ok(HTLCFailureMsg::Malformed(msgs::UpdateFailMalformedHTLC {
6025 channel_id: Readable::read(reader)?,
6026 htlc_id: Readable::read(reader)?,
6027 sha256_of_onion: Readable::read(reader)?,
6028 failure_code: Readable::read(reader)?,
6031 // In versions prior to 0.0.101, HTLCFailureMsg objects were written with type 0 or 1 but
6032 // weren't length-prefixed and thus didn't support reading the TLV stream suffix of the network
6033 // messages contained in the variants.
6034 // In version 0.0.101, support for reading the variants with these types was added, and
6035 // we should migrate to writing these variants when UpdateFailHTLC or
6036 // UpdateFailMalformedHTLC get TLV fields.
6038 let length: BigSize = Readable::read(reader)?;
6039 let mut s = FixedLengthReader::new(reader, length.0);
6040 let res = Readable::read(&mut s)?;
6041 s.eat_remaining()?; // Return ShortRead if there's actually not enough bytes
6042 Ok(HTLCFailureMsg::Relay(res))
6045 let length: BigSize = Readable::read(reader)?;
6046 let mut s = FixedLengthReader::new(reader, length.0);
6047 let res = Readable::read(&mut s)?;
6048 s.eat_remaining()?; // Return ShortRead if there's actually not enough bytes
6049 Ok(HTLCFailureMsg::Malformed(res))
6051 _ => Err(DecodeError::UnknownRequiredFeature),
6056 impl_writeable_tlv_based_enum!(PendingHTLCStatus, ;
6061 impl_writeable_tlv_based!(HTLCPreviousHopData, {
6062 (0, short_channel_id, required),
6063 (1, phantom_shared_secret, option),
6064 (2, outpoint, required),
6065 (4, htlc_id, required),
6066 (6, incoming_packet_shared_secret, required)
6069 impl Writeable for ClaimableHTLC {
6070 fn write<W: Writer>(&self, writer: &mut W) -> Result<(), io::Error> {
6071 let payment_data = match &self.onion_payload {
6072 OnionPayload::Invoice(data) => Some(data.clone()),
6075 let keysend_preimage = match self.onion_payload {
6076 OnionPayload::Invoice(_) => None,
6077 OnionPayload::Spontaneous(preimage) => Some(preimage.clone()),
6082 (0, self.prev_hop, required), (2, self.value, required),
6083 (4, payment_data, option), (6, self.cltv_expiry, required),
6084 (8, keysend_preimage, option),
6090 impl Readable for ClaimableHTLC {
6091 fn read<R: Read>(reader: &mut R) -> Result<Self, DecodeError> {
6092 let mut prev_hop = ::util::ser::OptionDeserWrapper(None);
6094 let mut payment_data: Option<msgs::FinalOnionHopData> = None;
6095 let mut cltv_expiry = 0;
6096 let mut keysend_preimage: Option<PaymentPreimage> = None;
6100 (0, prev_hop, required), (2, value, required),
6101 (4, payment_data, option), (6, cltv_expiry, required),
6102 (8, keysend_preimage, option)
6104 let onion_payload = match keysend_preimage {
6106 if payment_data.is_some() {
6107 return Err(DecodeError::InvalidValue)
6109 OnionPayload::Spontaneous(p)
6112 if payment_data.is_none() {
6113 return Err(DecodeError::InvalidValue)
6115 OnionPayload::Invoice(payment_data.unwrap())
6119 prev_hop: prev_hop.0.unwrap(),
6128 impl Readable for HTLCSource {
6129 fn read<R: Read>(reader: &mut R) -> Result<Self, DecodeError> {
6130 let id: u8 = Readable::read(reader)?;
6133 let mut session_priv: ::util::ser::OptionDeserWrapper<SecretKey> = ::util::ser::OptionDeserWrapper(None);
6134 let mut first_hop_htlc_msat: u64 = 0;
6135 let mut path = Some(Vec::new());
6136 let mut payment_id = None;
6137 let mut payment_secret = None;
6138 let mut payment_params = None;
6139 read_tlv_fields!(reader, {
6140 (0, session_priv, required),
6141 (1, payment_id, option),
6142 (2, first_hop_htlc_msat, required),
6143 (3, payment_secret, option),
6144 (4, path, vec_type),
6145 (5, payment_params, option),
6147 if payment_id.is_none() {
6148 // For backwards compat, if there was no payment_id written, use the session_priv bytes
6150 payment_id = Some(PaymentId(*session_priv.0.unwrap().as_ref()));
6152 Ok(HTLCSource::OutboundRoute {
6153 session_priv: session_priv.0.unwrap(),
6154 first_hop_htlc_msat: first_hop_htlc_msat,
6155 path: path.unwrap(),
6156 payment_id: payment_id.unwrap(),
6161 1 => Ok(HTLCSource::PreviousHopData(Readable::read(reader)?)),
6162 _ => Err(DecodeError::UnknownRequiredFeature),
6167 impl Writeable for HTLCSource {
6168 fn write<W: Writer>(&self, writer: &mut W) -> Result<(), ::io::Error> {
6170 HTLCSource::OutboundRoute { ref session_priv, ref first_hop_htlc_msat, ref path, payment_id, payment_secret, payment_params } => {
6172 let payment_id_opt = Some(payment_id);
6173 write_tlv_fields!(writer, {
6174 (0, session_priv, required),
6175 (1, payment_id_opt, option),
6176 (2, first_hop_htlc_msat, required),
6177 (3, payment_secret, option),
6178 (4, path, vec_type),
6179 (5, payment_params, option),
6182 HTLCSource::PreviousHopData(ref field) => {
6184 field.write(writer)?;
6191 impl_writeable_tlv_based_enum!(HTLCFailReason,
6192 (0, LightningError) => {
6196 (0, failure_code, required),
6197 (2, data, vec_type),
6201 impl_writeable_tlv_based_enum!(HTLCForwardInfo,
6203 (0, forward_info, required),
6204 (2, prev_short_channel_id, required),
6205 (4, prev_htlc_id, required),
6206 (6, prev_funding_outpoint, required),
6209 (0, htlc_id, required),
6210 (2, err_packet, required),
6214 impl_writeable_tlv_based!(PendingInboundPayment, {
6215 (0, payment_secret, required),
6216 (2, expiry_time, required),
6217 (4, user_payment_id, required),
6218 (6, payment_preimage, required),
6219 (8, min_value_msat, required),
6222 impl_writeable_tlv_based_enum_upgradable!(PendingOutboundPayment,
6224 (0, session_privs, required),
6227 (0, session_privs, required),
6228 (1, payment_hash, option),
6231 (0, session_privs, required),
6232 (1, pending_fee_msat, option),
6233 (2, payment_hash, required),
6234 (4, payment_secret, option),
6235 (6, total_msat, required),
6236 (8, pending_amt_msat, required),
6237 (10, starting_block_height, required),
6240 (0, session_privs, required),
6241 (2, payment_hash, required),
6245 impl<Signer: Sign, M: Deref, T: Deref, K: Deref, F: Deref, L: Deref> Writeable for ChannelManager<Signer, M, T, K, F, L>
6246 where M::Target: chain::Watch<Signer>,
6247 T::Target: BroadcasterInterface,
6248 K::Target: KeysInterface<Signer = Signer>,
6249 F::Target: FeeEstimator,
6252 fn write<W: Writer>(&self, writer: &mut W) -> Result<(), io::Error> {
6253 let _consistency_lock = self.total_consistency_lock.write().unwrap();
6255 write_ver_prefix!(writer, SERIALIZATION_VERSION, MIN_SERIALIZATION_VERSION);
6257 self.genesis_hash.write(writer)?;
6259 let best_block = self.best_block.read().unwrap();
6260 best_block.height().write(writer)?;
6261 best_block.block_hash().write(writer)?;
6264 let channel_state = self.channel_state.lock().unwrap();
6265 let mut unfunded_channels = 0;
6266 for (_, channel) in channel_state.by_id.iter() {
6267 if !channel.is_funding_initiated() {
6268 unfunded_channels += 1;
6271 ((channel_state.by_id.len() - unfunded_channels) as u64).write(writer)?;
6272 for (_, channel) in channel_state.by_id.iter() {
6273 if channel.is_funding_initiated() {
6274 channel.write(writer)?;
6278 (channel_state.forward_htlcs.len() as u64).write(writer)?;
6279 for (short_channel_id, pending_forwards) in channel_state.forward_htlcs.iter() {
6280 short_channel_id.write(writer)?;
6281 (pending_forwards.len() as u64).write(writer)?;
6282 for forward in pending_forwards {
6283 forward.write(writer)?;
6287 (channel_state.claimable_htlcs.len() as u64).write(writer)?;
6288 for (payment_hash, previous_hops) in channel_state.claimable_htlcs.iter() {
6289 payment_hash.write(writer)?;
6290 (previous_hops.len() as u64).write(writer)?;
6291 for htlc in previous_hops.iter() {
6292 htlc.write(writer)?;
6296 let per_peer_state = self.per_peer_state.write().unwrap();
6297 (per_peer_state.len() as u64).write(writer)?;
6298 for (peer_pubkey, peer_state_mutex) in per_peer_state.iter() {
6299 peer_pubkey.write(writer)?;
6300 let peer_state = peer_state_mutex.lock().unwrap();
6301 peer_state.latest_features.write(writer)?;
6304 let pending_inbound_payments = self.pending_inbound_payments.lock().unwrap();
6305 let pending_outbound_payments = self.pending_outbound_payments.lock().unwrap();
6306 let events = self.pending_events.lock().unwrap();
6307 (events.len() as u64).write(writer)?;
6308 for event in events.iter() {
6309 event.write(writer)?;
6312 let background_events = self.pending_background_events.lock().unwrap();
6313 (background_events.len() as u64).write(writer)?;
6314 for event in background_events.iter() {
6316 BackgroundEvent::ClosingMonitorUpdate((funding_txo, monitor_update)) => {
6318 funding_txo.write(writer)?;
6319 monitor_update.write(writer)?;
6324 (self.last_node_announcement_serial.load(Ordering::Acquire) as u32).write(writer)?;
6325 (self.highest_seen_timestamp.load(Ordering::Acquire) as u32).write(writer)?;
6327 (pending_inbound_payments.len() as u64).write(writer)?;
6328 for (hash, pending_payment) in pending_inbound_payments.iter() {
6329 hash.write(writer)?;
6330 pending_payment.write(writer)?;
6333 // For backwards compat, write the session privs and their total length.
6334 let mut num_pending_outbounds_compat: u64 = 0;
6335 for (_, outbound) in pending_outbound_payments.iter() {
6336 if !outbound.is_fulfilled() && !outbound.abandoned() {
6337 num_pending_outbounds_compat += outbound.remaining_parts() as u64;
6340 num_pending_outbounds_compat.write(writer)?;
6341 for (_, outbound) in pending_outbound_payments.iter() {
6343 PendingOutboundPayment::Legacy { session_privs } |
6344 PendingOutboundPayment::Retryable { session_privs, .. } => {
6345 for session_priv in session_privs.iter() {
6346 session_priv.write(writer)?;
6349 PendingOutboundPayment::Fulfilled { .. } => {},
6350 PendingOutboundPayment::Abandoned { .. } => {},
6354 // Encode without retry info for 0.0.101 compatibility.
6355 let mut pending_outbound_payments_no_retry: HashMap<PaymentId, HashSet<[u8; 32]>> = HashMap::new();
6356 for (id, outbound) in pending_outbound_payments.iter() {
6358 PendingOutboundPayment::Legacy { session_privs } |
6359 PendingOutboundPayment::Retryable { session_privs, .. } => {
6360 pending_outbound_payments_no_retry.insert(*id, session_privs.clone());
6365 write_tlv_fields!(writer, {
6366 (1, pending_outbound_payments_no_retry, required),
6367 (3, pending_outbound_payments, required),
6368 (5, self.our_network_pubkey, required),
6369 (7, self.fake_scid_rand_bytes, required),
6376 /// Arguments for the creation of a ChannelManager that are not deserialized.
6378 /// At a high-level, the process for deserializing a ChannelManager and resuming normal operation
6380 /// 1) Deserialize all stored [`ChannelMonitor`]s.
6381 /// 2) Deserialize the [`ChannelManager`] by filling in this struct and calling:
6382 /// `<(BlockHash, ChannelManager)>::read(reader, args)`
6383 /// This may result in closing some channels if the [`ChannelMonitor`] is newer than the stored
6384 /// [`ChannelManager`] state to ensure no loss of funds. Thus, transactions may be broadcasted.
6385 /// 3) If you are not fetching full blocks, register all relevant [`ChannelMonitor`] outpoints the
6386 /// same way you would handle a [`chain::Filter`] call using
6387 /// [`ChannelMonitor::get_outputs_to_watch`] and [`ChannelMonitor::get_funding_txo`].
6388 /// 4) Reconnect blocks on your [`ChannelMonitor`]s.
6389 /// 5) Disconnect/connect blocks on the [`ChannelManager`].
6390 /// 6) Re-persist the [`ChannelMonitor`]s to ensure the latest state is on disk.
6391 /// Note that if you're using a [`ChainMonitor`] for your [`chain::Watch`] implementation, you
6392 /// will likely accomplish this as a side-effect of calling [`chain::Watch::watch_channel`] in
6394 /// 7) Move the [`ChannelMonitor`]s into your local [`chain::Watch`]. If you're using a
6395 /// [`ChainMonitor`], this is done by calling [`chain::Watch::watch_channel`].
6397 /// Note that the ordering of #4-7 is not of importance, however all four must occur before you
6398 /// call any other methods on the newly-deserialized [`ChannelManager`].
6400 /// Note that because some channels may be closed during deserialization, it is critical that you
6401 /// always deserialize only the latest version of a ChannelManager and ChannelMonitors available to
6402 /// you. If you deserialize an old ChannelManager (during which force-closure transactions may be
6403 /// broadcast), and then later deserialize a newer version of the same ChannelManager (which will
6404 /// not force-close the same channels but consider them live), you may end up revoking a state for
6405 /// which you've already broadcasted the transaction.
6407 /// [`ChainMonitor`]: crate::chain::chainmonitor::ChainMonitor
6408 pub struct ChannelManagerReadArgs<'a, Signer: 'a + Sign, M: Deref, T: Deref, K: Deref, F: Deref, L: Deref>
6409 where M::Target: chain::Watch<Signer>,
6410 T::Target: BroadcasterInterface,
6411 K::Target: KeysInterface<Signer = Signer>,
6412 F::Target: FeeEstimator,
6415 /// The keys provider which will give us relevant keys. Some keys will be loaded during
6416 /// deserialization and KeysInterface::read_chan_signer will be used to read per-Channel
6418 pub keys_manager: K,
6420 /// The fee_estimator for use in the ChannelManager in the future.
6422 /// No calls to the FeeEstimator will be made during deserialization.
6423 pub fee_estimator: F,
6424 /// The chain::Watch for use in the ChannelManager in the future.
6426 /// No calls to the chain::Watch will be made during deserialization. It is assumed that
6427 /// you have deserialized ChannelMonitors separately and will add them to your
6428 /// chain::Watch after deserializing this ChannelManager.
6429 pub chain_monitor: M,
6431 /// The BroadcasterInterface which will be used in the ChannelManager in the future and may be
6432 /// used to broadcast the latest local commitment transactions of channels which must be
6433 /// force-closed during deserialization.
6434 pub tx_broadcaster: T,
6435 /// The Logger for use in the ChannelManager and which may be used to log information during
6436 /// deserialization.
6438 /// Default settings used for new channels. Any existing channels will continue to use the
6439 /// runtime settings which were stored when the ChannelManager was serialized.
6440 pub default_config: UserConfig,
6442 /// A map from channel funding outpoints to ChannelMonitors for those channels (ie
6443 /// value.get_funding_txo() should be the key).
6445 /// If a monitor is inconsistent with the channel state during deserialization the channel will
6446 /// be force-closed using the data in the ChannelMonitor and the channel will be dropped. This
6447 /// is true for missing channels as well. If there is a monitor missing for which we find
6448 /// channel data Err(DecodeError::InvalidValue) will be returned.
6450 /// In such cases the latest local transactions will be sent to the tx_broadcaster included in
6453 /// (C-not exported) because we have no HashMap bindings
6454 pub channel_monitors: HashMap<OutPoint, &'a mut ChannelMonitor<Signer>>,
6457 impl<'a, Signer: 'a + Sign, M: Deref, T: Deref, K: Deref, F: Deref, L: Deref>
6458 ChannelManagerReadArgs<'a, Signer, M, T, K, F, L>
6459 where M::Target: chain::Watch<Signer>,
6460 T::Target: BroadcasterInterface,
6461 K::Target: KeysInterface<Signer = Signer>,
6462 F::Target: FeeEstimator,
6465 /// Simple utility function to create a ChannelManagerReadArgs which creates the monitor
6466 /// HashMap for you. This is primarily useful for C bindings where it is not practical to
6467 /// populate a HashMap directly from C.
6468 pub fn new(keys_manager: K, fee_estimator: F, chain_monitor: M, tx_broadcaster: T, logger: L, default_config: UserConfig,
6469 mut channel_monitors: Vec<&'a mut ChannelMonitor<Signer>>) -> Self {
6471 keys_manager, fee_estimator, chain_monitor, tx_broadcaster, logger, default_config,
6472 channel_monitors: channel_monitors.drain(..).map(|monitor| { (monitor.get_funding_txo().0, monitor) }).collect()
6477 // Implement ReadableArgs for an Arc'd ChannelManager to make it a bit easier to work with the
6478 // SipmleArcChannelManager type:
6479 impl<'a, Signer: Sign, M: Deref, T: Deref, K: Deref, F: Deref, L: Deref>
6480 ReadableArgs<ChannelManagerReadArgs<'a, Signer, M, T, K, F, L>> for (BlockHash, Arc<ChannelManager<Signer, M, T, K, F, L>>)
6481 where M::Target: chain::Watch<Signer>,
6482 T::Target: BroadcasterInterface,
6483 K::Target: KeysInterface<Signer = Signer>,
6484 F::Target: FeeEstimator,
6487 fn read<R: io::Read>(reader: &mut R, args: ChannelManagerReadArgs<'a, Signer, M, T, K, F, L>) -> Result<Self, DecodeError> {
6488 let (blockhash, chan_manager) = <(BlockHash, ChannelManager<Signer, M, T, K, F, L>)>::read(reader, args)?;
6489 Ok((blockhash, Arc::new(chan_manager)))
6493 impl<'a, Signer: Sign, M: Deref, T: Deref, K: Deref, F: Deref, L: Deref>
6494 ReadableArgs<ChannelManagerReadArgs<'a, Signer, M, T, K, F, L>> for (BlockHash, ChannelManager<Signer, M, T, K, F, L>)
6495 where M::Target: chain::Watch<Signer>,
6496 T::Target: BroadcasterInterface,
6497 K::Target: KeysInterface<Signer = Signer>,
6498 F::Target: FeeEstimator,
6501 fn read<R: io::Read>(reader: &mut R, mut args: ChannelManagerReadArgs<'a, Signer, M, T, K, F, L>) -> Result<Self, DecodeError> {
6502 let _ver = read_ver_prefix!(reader, SERIALIZATION_VERSION);
6504 let genesis_hash: BlockHash = Readable::read(reader)?;
6505 let best_block_height: u32 = Readable::read(reader)?;
6506 let best_block_hash: BlockHash = Readable::read(reader)?;
6508 let mut failed_htlcs = Vec::new();
6510 let channel_count: u64 = Readable::read(reader)?;
6511 let mut funding_txo_set = HashSet::with_capacity(cmp::min(channel_count as usize, 128));
6512 let mut by_id = HashMap::with_capacity(cmp::min(channel_count as usize, 128));
6513 let mut short_to_id = HashMap::with_capacity(cmp::min(channel_count as usize, 128));
6514 let mut channel_closures = Vec::new();
6515 for _ in 0..channel_count {
6516 let mut channel: Channel<Signer> = Channel::read(reader, (&args.keys_manager, best_block_height))?;
6517 let funding_txo = channel.get_funding_txo().ok_or(DecodeError::InvalidValue)?;
6518 funding_txo_set.insert(funding_txo.clone());
6519 if let Some(ref mut monitor) = args.channel_monitors.get_mut(&funding_txo) {
6520 if channel.get_cur_holder_commitment_transaction_number() < monitor.get_cur_holder_commitment_number() ||
6521 channel.get_revoked_counterparty_commitment_transaction_number() < monitor.get_min_seen_secret() ||
6522 channel.get_cur_counterparty_commitment_transaction_number() < monitor.get_cur_counterparty_commitment_number() ||
6523 channel.get_latest_monitor_update_id() > monitor.get_latest_update_id() {
6524 // If the channel is ahead of the monitor, return InvalidValue:
6525 log_error!(args.logger, "A ChannelMonitor is stale compared to the current ChannelManager! This indicates a potentially-critical violation of the chain::Watch API!");
6526 log_error!(args.logger, " The ChannelMonitor for channel {} is at update_id {} but the ChannelManager is at update_id {}.",
6527 log_bytes!(channel.channel_id()), monitor.get_latest_update_id(), channel.get_latest_monitor_update_id());
6528 log_error!(args.logger, " The chain::Watch API *requires* that monitors are persisted durably before returning,");
6529 log_error!(args.logger, " client applications must ensure that ChannelMonitor data is always available and the latest to avoid funds loss!");
6530 log_error!(args.logger, " Without the latest ChannelMonitor we cannot continue without risking funds.");
6531 log_error!(args.logger, " Please ensure the chain::Watch API requirements are met and file a bug report at https://github.com/lightningdevkit/rust-lightning");
6532 return Err(DecodeError::InvalidValue);
6533 } else if channel.get_cur_holder_commitment_transaction_number() > monitor.get_cur_holder_commitment_number() ||
6534 channel.get_revoked_counterparty_commitment_transaction_number() > monitor.get_min_seen_secret() ||
6535 channel.get_cur_counterparty_commitment_transaction_number() > monitor.get_cur_counterparty_commitment_number() ||
6536 channel.get_latest_monitor_update_id() < monitor.get_latest_update_id() {
6537 // But if the channel is behind of the monitor, close the channel:
6538 log_error!(args.logger, "A ChannelManager is stale compared to the current ChannelMonitor!");
6539 log_error!(args.logger, " The channel will be force-closed and the latest commitment transaction from the ChannelMonitor broadcast.");
6540 log_error!(args.logger, " The ChannelMonitor for channel {} is at update_id {} but the ChannelManager is at update_id {}.",
6541 log_bytes!(channel.channel_id()), monitor.get_latest_update_id(), channel.get_latest_monitor_update_id());
6542 let (_, mut new_failed_htlcs) = channel.force_shutdown(true);
6543 failed_htlcs.append(&mut new_failed_htlcs);
6544 monitor.broadcast_latest_holder_commitment_txn(&args.tx_broadcaster, &args.logger);
6545 channel_closures.push(events::Event::ChannelClosed {
6546 channel_id: channel.channel_id(),
6547 user_channel_id: channel.get_user_id(),
6548 reason: ClosureReason::OutdatedChannelManager
6551 log_info!(args.logger, "Successfully loaded channel {}", log_bytes!(channel.channel_id()));
6552 if let Some(short_channel_id) = channel.get_short_channel_id() {
6553 short_to_id.insert(short_channel_id, channel.channel_id());
6555 by_id.insert(channel.channel_id(), channel);
6558 log_error!(args.logger, "Missing ChannelMonitor for channel {} needed by ChannelManager.", log_bytes!(channel.channel_id()));
6559 log_error!(args.logger, " The chain::Watch API *requires* that monitors are persisted durably before returning,");
6560 log_error!(args.logger, " client applications must ensure that ChannelMonitor data is always available and the latest to avoid funds loss!");
6561 log_error!(args.logger, " Without the ChannelMonitor we cannot continue without risking funds.");
6562 log_error!(args.logger, " Please ensure the chain::Watch API requirements are met and file a bug report at https://github.com/lightningdevkit/rust-lightning");
6563 return Err(DecodeError::InvalidValue);
6567 for (ref funding_txo, ref mut monitor) in args.channel_monitors.iter_mut() {
6568 if !funding_txo_set.contains(funding_txo) {
6569 log_info!(args.logger, "Broadcasting latest holder commitment transaction for closed channel {}", log_bytes!(funding_txo.to_channel_id()));
6570 monitor.broadcast_latest_holder_commitment_txn(&args.tx_broadcaster, &args.logger);
6574 const MAX_ALLOC_SIZE: usize = 1024 * 64;
6575 let forward_htlcs_count: u64 = Readable::read(reader)?;
6576 let mut forward_htlcs = HashMap::with_capacity(cmp::min(forward_htlcs_count as usize, 128));
6577 for _ in 0..forward_htlcs_count {
6578 let short_channel_id = Readable::read(reader)?;
6579 let pending_forwards_count: u64 = Readable::read(reader)?;
6580 let mut pending_forwards = Vec::with_capacity(cmp::min(pending_forwards_count as usize, MAX_ALLOC_SIZE/mem::size_of::<HTLCForwardInfo>()));
6581 for _ in 0..pending_forwards_count {
6582 pending_forwards.push(Readable::read(reader)?);
6584 forward_htlcs.insert(short_channel_id, pending_forwards);
6587 let claimable_htlcs_count: u64 = Readable::read(reader)?;
6588 let mut claimable_htlcs = HashMap::with_capacity(cmp::min(claimable_htlcs_count as usize, 128));
6589 for _ in 0..claimable_htlcs_count {
6590 let payment_hash = Readable::read(reader)?;
6591 let previous_hops_len: u64 = Readable::read(reader)?;
6592 let mut previous_hops = Vec::with_capacity(cmp::min(previous_hops_len as usize, MAX_ALLOC_SIZE/mem::size_of::<ClaimableHTLC>()));
6593 for _ in 0..previous_hops_len {
6594 previous_hops.push(Readable::read(reader)?);
6596 claimable_htlcs.insert(payment_hash, previous_hops);
6599 let peer_count: u64 = Readable::read(reader)?;
6600 let mut per_peer_state = HashMap::with_capacity(cmp::min(peer_count as usize, MAX_ALLOC_SIZE/mem::size_of::<(PublicKey, Mutex<PeerState>)>()));
6601 for _ in 0..peer_count {
6602 let peer_pubkey = Readable::read(reader)?;
6603 let peer_state = PeerState {
6604 latest_features: Readable::read(reader)?,
6606 per_peer_state.insert(peer_pubkey, Mutex::new(peer_state));
6609 let event_count: u64 = Readable::read(reader)?;
6610 let mut pending_events_read: Vec<events::Event> = Vec::with_capacity(cmp::min(event_count as usize, MAX_ALLOC_SIZE/mem::size_of::<events::Event>()));
6611 for _ in 0..event_count {
6612 match MaybeReadable::read(reader)? {
6613 Some(event) => pending_events_read.push(event),
6617 if forward_htlcs_count > 0 {
6618 // If we have pending HTLCs to forward, assume we either dropped a
6619 // `PendingHTLCsForwardable` or the user received it but never processed it as they
6620 // shut down before the timer hit. Either way, set the time_forwardable to a small
6621 // constant as enough time has likely passed that we should simply handle the forwards
6622 // now, or at least after the user gets a chance to reconnect to our peers.
6623 pending_events_read.push(events::Event::PendingHTLCsForwardable {
6624 time_forwardable: Duration::from_secs(2),
6628 let background_event_count: u64 = Readable::read(reader)?;
6629 let mut pending_background_events_read: Vec<BackgroundEvent> = Vec::with_capacity(cmp::min(background_event_count as usize, MAX_ALLOC_SIZE/mem::size_of::<BackgroundEvent>()));
6630 for _ in 0..background_event_count {
6631 match <u8 as Readable>::read(reader)? {
6632 0 => pending_background_events_read.push(BackgroundEvent::ClosingMonitorUpdate((Readable::read(reader)?, Readable::read(reader)?))),
6633 _ => return Err(DecodeError::InvalidValue),
6637 let last_node_announcement_serial: u32 = Readable::read(reader)?;
6638 let highest_seen_timestamp: u32 = Readable::read(reader)?;
6640 let pending_inbound_payment_count: u64 = Readable::read(reader)?;
6641 let mut pending_inbound_payments: HashMap<PaymentHash, PendingInboundPayment> = HashMap::with_capacity(cmp::min(pending_inbound_payment_count as usize, MAX_ALLOC_SIZE/(3*32)));
6642 for _ in 0..pending_inbound_payment_count {
6643 if pending_inbound_payments.insert(Readable::read(reader)?, Readable::read(reader)?).is_some() {
6644 return Err(DecodeError::InvalidValue);
6648 let pending_outbound_payments_count_compat: u64 = Readable::read(reader)?;
6649 let mut pending_outbound_payments_compat: HashMap<PaymentId, PendingOutboundPayment> =
6650 HashMap::with_capacity(cmp::min(pending_outbound_payments_count_compat as usize, MAX_ALLOC_SIZE/32));
6651 for _ in 0..pending_outbound_payments_count_compat {
6652 let session_priv = Readable::read(reader)?;
6653 let payment = PendingOutboundPayment::Legacy {
6654 session_privs: [session_priv].iter().cloned().collect()
6656 if pending_outbound_payments_compat.insert(PaymentId(session_priv), payment).is_some() {
6657 return Err(DecodeError::InvalidValue)
6661 // pending_outbound_payments_no_retry is for compatibility with 0.0.101 clients.
6662 let mut pending_outbound_payments_no_retry: Option<HashMap<PaymentId, HashSet<[u8; 32]>>> = None;
6663 let mut pending_outbound_payments = None;
6664 let mut received_network_pubkey: Option<PublicKey> = None;
6665 let mut fake_scid_rand_bytes: Option<[u8; 32]> = None;
6666 read_tlv_fields!(reader, {
6667 (1, pending_outbound_payments_no_retry, option),
6668 (3, pending_outbound_payments, option),
6669 (5, received_network_pubkey, option),
6670 (7, fake_scid_rand_bytes, option),
6672 if fake_scid_rand_bytes.is_none() {
6673 fake_scid_rand_bytes = Some(args.keys_manager.get_secure_random_bytes());
6676 if pending_outbound_payments.is_none() && pending_outbound_payments_no_retry.is_none() {
6677 pending_outbound_payments = Some(pending_outbound_payments_compat);
6678 } else if pending_outbound_payments.is_none() {
6679 let mut outbounds = HashMap::new();
6680 for (id, session_privs) in pending_outbound_payments_no_retry.unwrap().drain() {
6681 outbounds.insert(id, PendingOutboundPayment::Legacy { session_privs });
6683 pending_outbound_payments = Some(outbounds);
6685 // If we're tracking pending payments, ensure we haven't lost any by looking at the
6686 // ChannelMonitor data for any channels for which we do not have authorative state
6687 // (i.e. those for which we just force-closed above or we otherwise don't have a
6688 // corresponding `Channel` at all).
6689 // This avoids several edge-cases where we would otherwise "forget" about pending
6690 // payments which are still in-flight via their on-chain state.
6691 // We only rebuild the pending payments map if we were most recently serialized by
6693 for (_, monitor) in args.channel_monitors {
6694 if by_id.get(&monitor.get_funding_txo().0.to_channel_id()).is_none() {
6695 for (htlc_source, htlc) in monitor.get_pending_outbound_htlcs() {
6696 if let HTLCSource::OutboundRoute { payment_id, session_priv, path, payment_secret, .. } = htlc_source {
6697 if path.is_empty() {
6698 log_error!(args.logger, "Got an empty path for a pending payment");
6699 return Err(DecodeError::InvalidValue);
6701 let path_amt = path.last().unwrap().fee_msat;
6702 let mut session_priv_bytes = [0; 32];
6703 session_priv_bytes[..].copy_from_slice(&session_priv[..]);
6704 match pending_outbound_payments.as_mut().unwrap().entry(payment_id) {
6705 hash_map::Entry::Occupied(mut entry) => {
6706 let newly_added = entry.get_mut().insert(session_priv_bytes, &path);
6707 log_info!(args.logger, "{} a pending payment path for {} msat for session priv {} on an existing pending payment with payment hash {}",
6708 if newly_added { "Added" } else { "Had" }, path_amt, log_bytes!(session_priv_bytes), log_bytes!(htlc.payment_hash.0));
6710 hash_map::Entry::Vacant(entry) => {
6711 let path_fee = path.get_path_fees();
6712 entry.insert(PendingOutboundPayment::Retryable {
6713 session_privs: [session_priv_bytes].iter().map(|a| *a).collect(),
6714 payment_hash: htlc.payment_hash,
6716 pending_amt_msat: path_amt,
6717 pending_fee_msat: Some(path_fee),
6718 total_msat: path_amt,
6719 starting_block_height: best_block_height,
6721 log_info!(args.logger, "Added a pending payment for {} msat with payment hash {} for path with session priv {}",
6722 path_amt, log_bytes!(htlc.payment_hash.0), log_bytes!(session_priv_bytes));
6731 let mut secp_ctx = Secp256k1::new();
6732 secp_ctx.seeded_randomize(&args.keys_manager.get_secure_random_bytes());
6734 if !channel_closures.is_empty() {
6735 pending_events_read.append(&mut channel_closures);
6738 let our_network_key = match args.keys_manager.get_node_secret(Recipient::Node) {
6740 Err(()) => return Err(DecodeError::InvalidValue)
6742 let our_network_pubkey = PublicKey::from_secret_key(&secp_ctx, &our_network_key);
6743 if let Some(network_pubkey) = received_network_pubkey {
6744 if network_pubkey != our_network_pubkey {
6745 log_error!(args.logger, "Key that was generated does not match the existing key.");
6746 return Err(DecodeError::InvalidValue);
6750 let mut outbound_scid_aliases = HashSet::new();
6751 for (chan_id, chan) in by_id.iter_mut() {
6752 if chan.outbound_scid_alias() == 0 {
6753 let mut outbound_scid_alias;
6755 outbound_scid_alias = fake_scid::Namespace::OutboundAlias
6756 .get_fake_scid(best_block_height, &genesis_hash, fake_scid_rand_bytes.as_ref().unwrap(), &args.keys_manager);
6757 if outbound_scid_aliases.insert(outbound_scid_alias) { break; }
6759 chan.set_outbound_scid_alias(outbound_scid_alias);
6760 } else if !outbound_scid_aliases.insert(chan.outbound_scid_alias()) {
6761 // Note that in rare cases its possible to hit this while reading an older
6762 // channel if we just happened to pick a colliding outbound alias above.
6763 log_error!(args.logger, "Got duplicate outbound SCID alias; {}", chan.outbound_scid_alias());
6764 return Err(DecodeError::InvalidValue);
6766 if chan.is_usable() {
6767 if short_to_id.insert(chan.outbound_scid_alias(), *chan_id).is_some() {
6768 // Note that in rare cases its possible to hit this while reading an older
6769 // channel if we just happened to pick a colliding outbound alias above.
6770 log_error!(args.logger, "Got duplicate outbound SCID alias; {}", chan.outbound_scid_alias());
6771 return Err(DecodeError::InvalidValue);
6776 let inbound_pmt_key_material = args.keys_manager.get_inbound_payment_key_material();
6777 let expanded_inbound_key = inbound_payment::ExpandedKey::new(&inbound_pmt_key_material);
6778 let channel_manager = ChannelManager {
6780 fee_estimator: args.fee_estimator,
6781 chain_monitor: args.chain_monitor,
6782 tx_broadcaster: args.tx_broadcaster,
6784 best_block: RwLock::new(BestBlock::new(best_block_hash, best_block_height)),
6786 channel_state: Mutex::new(ChannelHolder {
6791 pending_msg_events: Vec::new(),
6793 inbound_payment_key: expanded_inbound_key,
6794 pending_inbound_payments: Mutex::new(pending_inbound_payments),
6795 pending_outbound_payments: Mutex::new(pending_outbound_payments.unwrap()),
6797 outbound_scid_aliases: Mutex::new(outbound_scid_aliases),
6798 fake_scid_rand_bytes: fake_scid_rand_bytes.unwrap(),
6804 last_node_announcement_serial: AtomicUsize::new(last_node_announcement_serial as usize),
6805 highest_seen_timestamp: AtomicUsize::new(highest_seen_timestamp as usize),
6807 per_peer_state: RwLock::new(per_peer_state),
6809 pending_events: Mutex::new(pending_events_read),
6810 pending_background_events: Mutex::new(pending_background_events_read),
6811 total_consistency_lock: RwLock::new(()),
6812 persistence_notifier: PersistenceNotifier::new(),
6814 keys_manager: args.keys_manager,
6815 logger: args.logger,
6816 default_configuration: args.default_config,
6819 for htlc_source in failed_htlcs.drain(..) {
6820 channel_manager.fail_htlc_backwards_internal(channel_manager.channel_state.lock().unwrap(), htlc_source.0, &htlc_source.1, HTLCFailReason::Reason { failure_code: 0x4000 | 8, data: Vec::new() });
6823 //TODO: Broadcast channel update for closed channels, but only after we've made a
6824 //connection or two.
6826 Ok((best_block_hash.clone(), channel_manager))
6832 use bitcoin::hashes::Hash;
6833 use bitcoin::hashes::sha256::Hash as Sha256;
6834 use core::time::Duration;
6835 use core::sync::atomic::Ordering;
6836 use ln::{PaymentPreimage, PaymentHash, PaymentSecret};
6837 use ln::channelmanager::{PaymentId, PaymentSendFailure};
6838 use ln::channelmanager::inbound_payment;
6839 use ln::features::InitFeatures;
6840 use ln::functional_test_utils::*;
6842 use ln::msgs::ChannelMessageHandler;
6843 use routing::router::{PaymentParameters, RouteParameters, find_route};
6844 use util::errors::APIError;
6845 use util::events::{Event, MessageSendEvent, MessageSendEventsProvider};
6846 use util::test_utils;
6847 use chain::keysinterface::KeysInterface;
6849 #[cfg(feature = "std")]
6851 fn test_wait_timeout() {
6852 use ln::channelmanager::PersistenceNotifier;
6854 use core::sync::atomic::AtomicBool;
6857 let persistence_notifier = Arc::new(PersistenceNotifier::new());
6858 let thread_notifier = Arc::clone(&persistence_notifier);
6860 let exit_thread = Arc::new(AtomicBool::new(false));
6861 let exit_thread_clone = exit_thread.clone();
6862 thread::spawn(move || {
6864 let &(ref persist_mtx, ref cnd) = &thread_notifier.persistence_lock;
6865 let mut persistence_lock = persist_mtx.lock().unwrap();
6866 *persistence_lock = true;
6869 if exit_thread_clone.load(Ordering::SeqCst) {
6875 // Check that we can block indefinitely until updates are available.
6876 let _ = persistence_notifier.wait();
6878 // Check that the PersistenceNotifier will return after the given duration if updates are
6881 if persistence_notifier.wait_timeout(Duration::from_millis(100)) {
6886 exit_thread.store(true, Ordering::SeqCst);
6888 // Check that the PersistenceNotifier will return after the given duration even if no updates
6891 if !persistence_notifier.wait_timeout(Duration::from_millis(100)) {
6898 fn test_notify_limits() {
6899 // Check that a few cases which don't require the persistence of a new ChannelManager,
6900 // indeed, do not cause the persistence of a new ChannelManager.
6901 let chanmon_cfgs = create_chanmon_cfgs(3);
6902 let node_cfgs = create_node_cfgs(3, &chanmon_cfgs);
6903 let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs, &[None, None, None]);
6904 let nodes = create_network(3, &node_cfgs, &node_chanmgrs);
6906 // All nodes start with a persistable update pending as `create_network` connects each node
6907 // with all other nodes to make most tests simpler.
6908 assert!(nodes[0].node.await_persistable_update_timeout(Duration::from_millis(1)));
6909 assert!(nodes[1].node.await_persistable_update_timeout(Duration::from_millis(1)));
6910 assert!(nodes[2].node.await_persistable_update_timeout(Duration::from_millis(1)));
6912 let mut chan = create_announced_chan_between_nodes(&nodes, 0, 1, InitFeatures::known(), InitFeatures::known());
6914 // We check that the channel info nodes have doesn't change too early, even though we try
6915 // to connect messages with new values
6916 chan.0.contents.fee_base_msat *= 2;
6917 chan.1.contents.fee_base_msat *= 2;
6918 let node_a_chan_info = nodes[0].node.list_channels()[0].clone();
6919 let node_b_chan_info = nodes[1].node.list_channels()[0].clone();
6921 // The first two nodes (which opened a channel) should now require fresh persistence
6922 assert!(nodes[0].node.await_persistable_update_timeout(Duration::from_millis(1)));
6923 assert!(nodes[1].node.await_persistable_update_timeout(Duration::from_millis(1)));
6924 // ... but the last node should not.
6925 assert!(!nodes[2].node.await_persistable_update_timeout(Duration::from_millis(1)));
6926 // After persisting the first two nodes they should no longer need fresh persistence.
6927 assert!(!nodes[0].node.await_persistable_update_timeout(Duration::from_millis(1)));
6928 assert!(!nodes[1].node.await_persistable_update_timeout(Duration::from_millis(1)));
6930 // Node 3, unrelated to the only channel, shouldn't care if it receives a channel_update
6931 // about the channel.
6932 nodes[2].node.handle_channel_update(&nodes[1].node.get_our_node_id(), &chan.0);
6933 nodes[2].node.handle_channel_update(&nodes[1].node.get_our_node_id(), &chan.1);
6934 assert!(!nodes[2].node.await_persistable_update_timeout(Duration::from_millis(1)));
6936 // The nodes which are a party to the channel should also ignore messages from unrelated
6938 nodes[0].node.handle_channel_update(&nodes[2].node.get_our_node_id(), &chan.0);
6939 nodes[0].node.handle_channel_update(&nodes[2].node.get_our_node_id(), &chan.1);
6940 nodes[1].node.handle_channel_update(&nodes[2].node.get_our_node_id(), &chan.0);
6941 nodes[1].node.handle_channel_update(&nodes[2].node.get_our_node_id(), &chan.1);
6942 assert!(!nodes[0].node.await_persistable_update_timeout(Duration::from_millis(1)));
6943 assert!(!nodes[1].node.await_persistable_update_timeout(Duration::from_millis(1)));
6945 // At this point the channel info given by peers should still be the same.
6946 assert_eq!(nodes[0].node.list_channels()[0], node_a_chan_info);
6947 assert_eq!(nodes[1].node.list_channels()[0], node_b_chan_info);
6949 // An earlier version of handle_channel_update didn't check the directionality of the
6950 // update message and would always update the local fee info, even if our peer was
6951 // (spuriously) forwarding us our own channel_update.
6952 let as_node_one = nodes[0].node.get_our_node_id().serialize()[..] < nodes[1].node.get_our_node_id().serialize()[..];
6953 let as_update = if as_node_one == (chan.0.contents.flags & 1 == 0 /* chan.0 is from node one */) { &chan.0 } else { &chan.1 };
6954 let bs_update = if as_node_one == (chan.0.contents.flags & 1 == 0 /* chan.0 is from node one */) { &chan.1 } else { &chan.0 };
6956 // First deliver each peers' own message, checking that the node doesn't need to be
6957 // persisted and that its channel info remains the same.
6958 nodes[0].node.handle_channel_update(&nodes[1].node.get_our_node_id(), &as_update);
6959 nodes[1].node.handle_channel_update(&nodes[0].node.get_our_node_id(), &bs_update);
6960 assert!(!nodes[0].node.await_persistable_update_timeout(Duration::from_millis(1)));
6961 assert!(!nodes[1].node.await_persistable_update_timeout(Duration::from_millis(1)));
6962 assert_eq!(nodes[0].node.list_channels()[0], node_a_chan_info);
6963 assert_eq!(nodes[1].node.list_channels()[0], node_b_chan_info);
6965 // Finally, deliver the other peers' message, ensuring each node needs to be persisted and
6966 // the channel info has updated.
6967 nodes[0].node.handle_channel_update(&nodes[1].node.get_our_node_id(), &bs_update);
6968 nodes[1].node.handle_channel_update(&nodes[0].node.get_our_node_id(), &as_update);
6969 assert!(nodes[0].node.await_persistable_update_timeout(Duration::from_millis(1)));
6970 assert!(nodes[1].node.await_persistable_update_timeout(Duration::from_millis(1)));
6971 assert_ne!(nodes[0].node.list_channels()[0], node_a_chan_info);
6972 assert_ne!(nodes[1].node.list_channels()[0], node_b_chan_info);
6976 fn test_keysend_dup_hash_partial_mpp() {
6977 // Test that a keysend payment with a duplicate hash to an existing partial MPP payment fails as
6979 let chanmon_cfgs = create_chanmon_cfgs(2);
6980 let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
6981 let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
6982 let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
6983 create_announced_chan_between_nodes(&nodes, 0, 1, InitFeatures::known(), InitFeatures::known());
6985 // First, send a partial MPP payment.
6986 let (route, our_payment_hash, payment_preimage, payment_secret) = get_route_and_payment_hash!(&nodes[0], nodes[1], 100_000);
6987 let payment_id = PaymentId([42; 32]);
6988 // Use the utility function send_payment_along_path to send the payment with MPP data which
6989 // indicates there are more HTLCs coming.
6990 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.
6991 nodes[0].node.send_payment_along_path(&route.paths[0], &route.payment_params, &our_payment_hash, &Some(payment_secret), 200_000, cur_height, payment_id, &None).unwrap();
6992 check_added_monitors!(nodes[0], 1);
6993 let mut events = nodes[0].node.get_and_clear_pending_msg_events();
6994 assert_eq!(events.len(), 1);
6995 pass_along_path(&nodes[0], &[&nodes[1]], 200_000, our_payment_hash, Some(payment_secret), events.drain(..).next().unwrap(), false, None);
6997 // Next, send a keysend payment with the same payment_hash and make sure it fails.
6998 nodes[0].node.send_spontaneous_payment(&route, Some(payment_preimage)).unwrap();
6999 check_added_monitors!(nodes[0], 1);
7000 let mut events = nodes[0].node.get_and_clear_pending_msg_events();
7001 assert_eq!(events.len(), 1);
7002 let ev = events.drain(..).next().unwrap();
7003 let payment_event = SendEvent::from_event(ev);
7004 nodes[1].node.handle_update_add_htlc(&nodes[0].node.get_our_node_id(), &payment_event.msgs[0]);
7005 check_added_monitors!(nodes[1], 0);
7006 commitment_signed_dance!(nodes[1], nodes[0], payment_event.commitment_msg, false);
7007 expect_pending_htlcs_forwardable!(nodes[1]);
7008 expect_pending_htlcs_forwardable!(nodes[1]);
7009 check_added_monitors!(nodes[1], 1);
7010 let updates = get_htlc_update_msgs!(nodes[1], nodes[0].node.get_our_node_id());
7011 assert!(updates.update_add_htlcs.is_empty());
7012 assert!(updates.update_fulfill_htlcs.is_empty());
7013 assert_eq!(updates.update_fail_htlcs.len(), 1);
7014 assert!(updates.update_fail_malformed_htlcs.is_empty());
7015 assert!(updates.update_fee.is_none());
7016 nodes[0].node.handle_update_fail_htlc(&nodes[1].node.get_our_node_id(), &updates.update_fail_htlcs[0]);
7017 commitment_signed_dance!(nodes[0], nodes[1], updates.commitment_signed, true, true);
7018 expect_payment_failed!(nodes[0], our_payment_hash, true);
7020 // Send the second half of the original MPP payment.
7021 nodes[0].node.send_payment_along_path(&route.paths[0], &route.payment_params, &our_payment_hash, &Some(payment_secret), 200_000, cur_height, payment_id, &None).unwrap();
7022 check_added_monitors!(nodes[0], 1);
7023 let mut events = nodes[0].node.get_and_clear_pending_msg_events();
7024 assert_eq!(events.len(), 1);
7025 pass_along_path(&nodes[0], &[&nodes[1]], 200_000, our_payment_hash, Some(payment_secret), events.drain(..).next().unwrap(), true, None);
7027 // Claim the full MPP payment. Note that we can't use a test utility like
7028 // claim_funds_along_route because the ordering of the messages causes the second half of the
7029 // payment to be put in the holding cell, which confuses the test utilities. So we exchange the
7030 // lightning messages manually.
7031 assert!(nodes[1].node.claim_funds(payment_preimage));
7032 check_added_monitors!(nodes[1], 2);
7033 let bs_first_updates = get_htlc_update_msgs!(nodes[1], nodes[0].node.get_our_node_id());
7034 nodes[0].node.handle_update_fulfill_htlc(&nodes[1].node.get_our_node_id(), &bs_first_updates.update_fulfill_htlcs[0]);
7035 nodes[0].node.handle_commitment_signed(&nodes[1].node.get_our_node_id(), &bs_first_updates.commitment_signed);
7036 check_added_monitors!(nodes[0], 1);
7037 let (as_first_raa, as_first_cs) = get_revoke_commit_msgs!(nodes[0], nodes[1].node.get_our_node_id());
7038 nodes[1].node.handle_revoke_and_ack(&nodes[0].node.get_our_node_id(), &as_first_raa);
7039 check_added_monitors!(nodes[1], 1);
7040 let bs_second_updates = get_htlc_update_msgs!(nodes[1], nodes[0].node.get_our_node_id());
7041 nodes[1].node.handle_commitment_signed(&nodes[0].node.get_our_node_id(), &as_first_cs);
7042 check_added_monitors!(nodes[1], 1);
7043 let bs_first_raa = get_event_msg!(nodes[1], MessageSendEvent::SendRevokeAndACK, nodes[0].node.get_our_node_id());
7044 nodes[0].node.handle_update_fulfill_htlc(&nodes[1].node.get_our_node_id(), &bs_second_updates.update_fulfill_htlcs[0]);
7045 nodes[0].node.handle_commitment_signed(&nodes[1].node.get_our_node_id(), &bs_second_updates.commitment_signed);
7046 check_added_monitors!(nodes[0], 1);
7047 let as_second_raa = get_event_msg!(nodes[0], MessageSendEvent::SendRevokeAndACK, nodes[1].node.get_our_node_id());
7048 nodes[0].node.handle_revoke_and_ack(&nodes[1].node.get_our_node_id(), &bs_first_raa);
7049 let as_second_updates = get_htlc_update_msgs!(nodes[0], nodes[1].node.get_our_node_id());
7050 check_added_monitors!(nodes[0], 1);
7051 nodes[1].node.handle_revoke_and_ack(&nodes[0].node.get_our_node_id(), &as_second_raa);
7052 check_added_monitors!(nodes[1], 1);
7053 nodes[1].node.handle_commitment_signed(&nodes[0].node.get_our_node_id(), &as_second_updates.commitment_signed);
7054 check_added_monitors!(nodes[1], 1);
7055 let bs_third_raa = get_event_msg!(nodes[1], MessageSendEvent::SendRevokeAndACK, nodes[0].node.get_our_node_id());
7056 nodes[0].node.handle_revoke_and_ack(&nodes[1].node.get_our_node_id(), &bs_third_raa);
7057 check_added_monitors!(nodes[0], 1);
7059 // Note that successful MPP payments will generate a single PaymentSent event upon the first
7060 // path's success and a PaymentPathSuccessful event for each path's success.
7061 let events = nodes[0].node.get_and_clear_pending_events();
7062 assert_eq!(events.len(), 3);
7064 Event::PaymentSent { payment_id: ref id, payment_preimage: ref preimage, payment_hash: ref hash, .. } => {
7065 assert_eq!(Some(payment_id), *id);
7066 assert_eq!(payment_preimage, *preimage);
7067 assert_eq!(our_payment_hash, *hash);
7069 _ => panic!("Unexpected event"),
7072 Event::PaymentPathSuccessful { payment_id: ref actual_payment_id, ref payment_hash, ref path } => {
7073 assert_eq!(payment_id, *actual_payment_id);
7074 assert_eq!(our_payment_hash, *payment_hash.as_ref().unwrap());
7075 assert_eq!(route.paths[0], *path);
7077 _ => panic!("Unexpected event"),
7080 Event::PaymentPathSuccessful { payment_id: ref actual_payment_id, ref payment_hash, ref path } => {
7081 assert_eq!(payment_id, *actual_payment_id);
7082 assert_eq!(our_payment_hash, *payment_hash.as_ref().unwrap());
7083 assert_eq!(route.paths[0], *path);
7085 _ => panic!("Unexpected event"),
7090 fn test_keysend_dup_payment_hash() {
7091 // (1): Test that a keysend payment with a duplicate payment hash to an existing pending
7092 // outbound regular payment fails as expected.
7093 // (2): Test that a regular payment with a duplicate payment hash to an existing keysend payment
7094 // fails as expected.
7095 let chanmon_cfgs = create_chanmon_cfgs(2);
7096 let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
7097 let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
7098 let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
7099 create_announced_chan_between_nodes(&nodes, 0, 1, InitFeatures::known(), InitFeatures::known());
7100 let scorer = test_utils::TestScorer::with_penalty(0);
7101 let random_seed_bytes = chanmon_cfgs[1].keys_manager.get_secure_random_bytes();
7103 // To start (1), send a regular payment but don't claim it.
7104 let expected_route = [&nodes[1]];
7105 let (payment_preimage, payment_hash, _) = route_payment(&nodes[0], &expected_route, 100_000);
7107 // Next, attempt a keysend payment and make sure it fails.
7108 let route_params = RouteParameters {
7109 payment_params: PaymentParameters::for_keysend(expected_route.last().unwrap().node.get_our_node_id()),
7110 final_value_msat: 100_000,
7111 final_cltv_expiry_delta: TEST_FINAL_CLTV,
7113 let route = find_route(
7114 &nodes[0].node.get_our_node_id(), &route_params, nodes[0].network_graph, None,
7115 nodes[0].logger, &scorer, &random_seed_bytes
7117 nodes[0].node.send_spontaneous_payment(&route, Some(payment_preimage)).unwrap();
7118 check_added_monitors!(nodes[0], 1);
7119 let mut events = nodes[0].node.get_and_clear_pending_msg_events();
7120 assert_eq!(events.len(), 1);
7121 let ev = events.drain(..).next().unwrap();
7122 let payment_event = SendEvent::from_event(ev);
7123 nodes[1].node.handle_update_add_htlc(&nodes[0].node.get_our_node_id(), &payment_event.msgs[0]);
7124 check_added_monitors!(nodes[1], 0);
7125 commitment_signed_dance!(nodes[1], nodes[0], payment_event.commitment_msg, false);
7126 expect_pending_htlcs_forwardable!(nodes[1]);
7127 expect_pending_htlcs_forwardable!(nodes[1]);
7128 check_added_monitors!(nodes[1], 1);
7129 let updates = get_htlc_update_msgs!(nodes[1], nodes[0].node.get_our_node_id());
7130 assert!(updates.update_add_htlcs.is_empty());
7131 assert!(updates.update_fulfill_htlcs.is_empty());
7132 assert_eq!(updates.update_fail_htlcs.len(), 1);
7133 assert!(updates.update_fail_malformed_htlcs.is_empty());
7134 assert!(updates.update_fee.is_none());
7135 nodes[0].node.handle_update_fail_htlc(&nodes[1].node.get_our_node_id(), &updates.update_fail_htlcs[0]);
7136 commitment_signed_dance!(nodes[0], nodes[1], updates.commitment_signed, true, true);
7137 expect_payment_failed!(nodes[0], payment_hash, true);
7139 // Finally, claim the original payment.
7140 claim_payment(&nodes[0], &expected_route, payment_preimage);
7142 // To start (2), send a keysend payment but don't claim it.
7143 let payment_preimage = PaymentPreimage([42; 32]);
7144 let route = find_route(
7145 &nodes[0].node.get_our_node_id(), &route_params, nodes[0].network_graph, None,
7146 nodes[0].logger, &scorer, &random_seed_bytes
7148 let (payment_hash, _) = nodes[0].node.send_spontaneous_payment(&route, Some(payment_preimage)).unwrap();
7149 check_added_monitors!(nodes[0], 1);
7150 let mut events = nodes[0].node.get_and_clear_pending_msg_events();
7151 assert_eq!(events.len(), 1);
7152 let event = events.pop().unwrap();
7153 let path = vec![&nodes[1]];
7154 pass_along_path(&nodes[0], &path, 100_000, payment_hash, None, event, true, Some(payment_preimage));
7156 // Next, attempt a regular payment and make sure it fails.
7157 let payment_secret = PaymentSecret([43; 32]);
7158 nodes[0].node.send_payment(&route, payment_hash, &Some(payment_secret)).unwrap();
7159 check_added_monitors!(nodes[0], 1);
7160 let mut events = nodes[0].node.get_and_clear_pending_msg_events();
7161 assert_eq!(events.len(), 1);
7162 let ev = events.drain(..).next().unwrap();
7163 let payment_event = SendEvent::from_event(ev);
7164 nodes[1].node.handle_update_add_htlc(&nodes[0].node.get_our_node_id(), &payment_event.msgs[0]);
7165 check_added_monitors!(nodes[1], 0);
7166 commitment_signed_dance!(nodes[1], nodes[0], payment_event.commitment_msg, false);
7167 expect_pending_htlcs_forwardable!(nodes[1]);
7168 expect_pending_htlcs_forwardable!(nodes[1]);
7169 check_added_monitors!(nodes[1], 1);
7170 let updates = get_htlc_update_msgs!(nodes[1], nodes[0].node.get_our_node_id());
7171 assert!(updates.update_add_htlcs.is_empty());
7172 assert!(updates.update_fulfill_htlcs.is_empty());
7173 assert_eq!(updates.update_fail_htlcs.len(), 1);
7174 assert!(updates.update_fail_malformed_htlcs.is_empty());
7175 assert!(updates.update_fee.is_none());
7176 nodes[0].node.handle_update_fail_htlc(&nodes[1].node.get_our_node_id(), &updates.update_fail_htlcs[0]);
7177 commitment_signed_dance!(nodes[0], nodes[1], updates.commitment_signed, true, true);
7178 expect_payment_failed!(nodes[0], payment_hash, true);
7180 // Finally, succeed the keysend payment.
7181 claim_payment(&nodes[0], &expected_route, payment_preimage);
7185 fn test_keysend_hash_mismatch() {
7186 // Test that if we receive a keysend `update_add_htlc` msg, we fail as expected if the keysend
7187 // preimage doesn't match the msg's payment hash.
7188 let chanmon_cfgs = create_chanmon_cfgs(2);
7189 let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
7190 let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
7191 let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
7193 let payer_pubkey = nodes[0].node.get_our_node_id();
7194 let payee_pubkey = nodes[1].node.get_our_node_id();
7195 nodes[0].node.peer_connected(&payee_pubkey, &msgs::Init { features: InitFeatures::known(), remote_network_address: None });
7196 nodes[1].node.peer_connected(&payer_pubkey, &msgs::Init { features: InitFeatures::known(), remote_network_address: None });
7198 let _chan = create_chan_between_nodes(&nodes[0], &nodes[1], InitFeatures::known(), InitFeatures::known());
7199 let route_params = RouteParameters {
7200 payment_params: PaymentParameters::for_keysend(payee_pubkey),
7201 final_value_msat: 10000,
7202 final_cltv_expiry_delta: 40,
7204 let network_graph = nodes[0].network_graph;
7205 let first_hops = nodes[0].node.list_usable_channels();
7206 let scorer = test_utils::TestScorer::with_penalty(0);
7207 let random_seed_bytes = chanmon_cfgs[1].keys_manager.get_secure_random_bytes();
7208 let route = find_route(
7209 &payer_pubkey, &route_params, network_graph, Some(&first_hops.iter().collect::<Vec<_>>()),
7210 nodes[0].logger, &scorer, &random_seed_bytes
7213 let test_preimage = PaymentPreimage([42; 32]);
7214 let mismatch_payment_hash = PaymentHash([43; 32]);
7215 let _ = nodes[0].node.send_payment_internal(&route, mismatch_payment_hash, &None, Some(test_preimage), None, None).unwrap();
7216 check_added_monitors!(nodes[0], 1);
7218 let updates = get_htlc_update_msgs!(nodes[0], nodes[1].node.get_our_node_id());
7219 assert_eq!(updates.update_add_htlcs.len(), 1);
7220 assert!(updates.update_fulfill_htlcs.is_empty());
7221 assert!(updates.update_fail_htlcs.is_empty());
7222 assert!(updates.update_fail_malformed_htlcs.is_empty());
7223 assert!(updates.update_fee.is_none());
7224 nodes[1].node.handle_update_add_htlc(&nodes[0].node.get_our_node_id(), &updates.update_add_htlcs[0]);
7226 nodes[1].logger.assert_log_contains("lightning::ln::channelmanager".to_string(), "Payment preimage didn't match payment hash".to_string(), 1);
7230 fn test_keysend_msg_with_secret_err() {
7231 // Test that we error as expected if we receive a keysend payment that includes a payment secret.
7232 let chanmon_cfgs = create_chanmon_cfgs(2);
7233 let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
7234 let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
7235 let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
7237 let payer_pubkey = nodes[0].node.get_our_node_id();
7238 let payee_pubkey = nodes[1].node.get_our_node_id();
7239 nodes[0].node.peer_connected(&payee_pubkey, &msgs::Init { features: InitFeatures::known(), remote_network_address: None });
7240 nodes[1].node.peer_connected(&payer_pubkey, &msgs::Init { features: InitFeatures::known(), remote_network_address: None });
7242 let _chan = create_chan_between_nodes(&nodes[0], &nodes[1], InitFeatures::known(), InitFeatures::known());
7243 let route_params = RouteParameters {
7244 payment_params: PaymentParameters::for_keysend(payee_pubkey),
7245 final_value_msat: 10000,
7246 final_cltv_expiry_delta: 40,
7248 let network_graph = nodes[0].network_graph;
7249 let first_hops = nodes[0].node.list_usable_channels();
7250 let scorer = test_utils::TestScorer::with_penalty(0);
7251 let random_seed_bytes = chanmon_cfgs[1].keys_manager.get_secure_random_bytes();
7252 let route = find_route(
7253 &payer_pubkey, &route_params, network_graph, Some(&first_hops.iter().collect::<Vec<_>>()),
7254 nodes[0].logger, &scorer, &random_seed_bytes
7257 let test_preimage = PaymentPreimage([42; 32]);
7258 let test_secret = PaymentSecret([43; 32]);
7259 let payment_hash = PaymentHash(Sha256::hash(&test_preimage.0).into_inner());
7260 let _ = nodes[0].node.send_payment_internal(&route, payment_hash, &Some(test_secret), Some(test_preimage), None, None).unwrap();
7261 check_added_monitors!(nodes[0], 1);
7263 let updates = get_htlc_update_msgs!(nodes[0], nodes[1].node.get_our_node_id());
7264 assert_eq!(updates.update_add_htlcs.len(), 1);
7265 assert!(updates.update_fulfill_htlcs.is_empty());
7266 assert!(updates.update_fail_htlcs.is_empty());
7267 assert!(updates.update_fail_malformed_htlcs.is_empty());
7268 assert!(updates.update_fee.is_none());
7269 nodes[1].node.handle_update_add_htlc(&nodes[0].node.get_our_node_id(), &updates.update_add_htlcs[0]);
7271 nodes[1].logger.assert_log_contains("lightning::ln::channelmanager".to_string(), "We don't support MPP keysend payments".to_string(), 1);
7275 fn test_multi_hop_missing_secret() {
7276 let chanmon_cfgs = create_chanmon_cfgs(4);
7277 let node_cfgs = create_node_cfgs(4, &chanmon_cfgs);
7278 let node_chanmgrs = create_node_chanmgrs(4, &node_cfgs, &[None, None, None, None]);
7279 let nodes = create_network(4, &node_cfgs, &node_chanmgrs);
7281 let chan_1_id = create_announced_chan_between_nodes(&nodes, 0, 1, InitFeatures::known(), InitFeatures::known()).0.contents.short_channel_id;
7282 let chan_2_id = create_announced_chan_between_nodes(&nodes, 0, 2, InitFeatures::known(), InitFeatures::known()).0.contents.short_channel_id;
7283 let chan_3_id = create_announced_chan_between_nodes(&nodes, 1, 3, InitFeatures::known(), InitFeatures::known()).0.contents.short_channel_id;
7284 let chan_4_id = create_announced_chan_between_nodes(&nodes, 2, 3, InitFeatures::known(), InitFeatures::known()).0.contents.short_channel_id;
7286 // Marshall an MPP route.
7287 let (mut route, payment_hash, _, _) = get_route_and_payment_hash!(&nodes[0], nodes[3], 100000);
7288 let path = route.paths[0].clone();
7289 route.paths.push(path);
7290 route.paths[0][0].pubkey = nodes[1].node.get_our_node_id();
7291 route.paths[0][0].short_channel_id = chan_1_id;
7292 route.paths[0][1].short_channel_id = chan_3_id;
7293 route.paths[1][0].pubkey = nodes[2].node.get_our_node_id();
7294 route.paths[1][0].short_channel_id = chan_2_id;
7295 route.paths[1][1].short_channel_id = chan_4_id;
7297 match nodes[0].node.send_payment(&route, payment_hash, &None).unwrap_err() {
7298 PaymentSendFailure::ParameterError(APIError::APIMisuseError { ref err }) => {
7299 assert!(regex::Regex::new(r"Payment secret is required for multi-path payments").unwrap().is_match(err)) },
7300 _ => panic!("unexpected error")
7305 fn bad_inbound_payment_hash() {
7306 // Add coverage for checking that a user-provided payment hash matches the payment secret.
7307 let chanmon_cfgs = create_chanmon_cfgs(2);
7308 let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
7309 let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
7310 let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
7312 let (_, payment_hash, payment_secret) = get_payment_preimage_hash!(&nodes[0]);
7313 let payment_data = msgs::FinalOnionHopData {
7315 total_msat: 100_000,
7318 // Ensure that if the payment hash given to `inbound_payment::verify` differs from the original,
7319 // payment verification fails as expected.
7320 let mut bad_payment_hash = payment_hash.clone();
7321 bad_payment_hash.0[0] += 1;
7322 match inbound_payment::verify(bad_payment_hash, payment_data.clone(), nodes[0].node.highest_seen_timestamp.load(Ordering::Acquire) as u64, &nodes[0].node.inbound_payment_key, &nodes[0].logger) {
7323 Ok(_) => panic!("Unexpected ok"),
7325 nodes[0].logger.assert_log_contains("lightning::ln::inbound_payment".to_string(), "Failing HTLC with user-generated payment_hash".to_string(), 1);
7329 // Check that using the original payment hash succeeds.
7330 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());
7334 #[cfg(all(any(test, feature = "_test_utils"), feature = "_bench_unstable"))]
7337 use chain::chainmonitor::{ChainMonitor, Persist};
7338 use chain::keysinterface::{KeysManager, KeysInterface, InMemorySigner};
7339 use ln::channelmanager::{BestBlock, ChainParameters, ChannelManager, PaymentHash, PaymentPreimage};
7340 use ln::features::{InitFeatures, InvoiceFeatures};
7341 use ln::functional_test_utils::*;
7342 use ln::msgs::{ChannelMessageHandler, Init};
7343 use routing::network_graph::NetworkGraph;
7344 use routing::router::{PaymentParameters, get_route};
7345 use util::test_utils;
7346 use util::config::UserConfig;
7347 use util::events::{Event, MessageSendEvent, MessageSendEventsProvider};
7349 use bitcoin::hashes::Hash;
7350 use bitcoin::hashes::sha256::Hash as Sha256;
7351 use bitcoin::{Block, BlockHeader, Transaction, TxOut};
7353 use sync::{Arc, Mutex};
7357 struct NodeHolder<'a, P: Persist<InMemorySigner>> {
7358 node: &'a ChannelManager<InMemorySigner,
7359 &'a ChainMonitor<InMemorySigner, &'a test_utils::TestChainSource,
7360 &'a test_utils::TestBroadcaster, &'a test_utils::TestFeeEstimator,
7361 &'a test_utils::TestLogger, &'a P>,
7362 &'a test_utils::TestBroadcaster, &'a KeysManager,
7363 &'a test_utils::TestFeeEstimator, &'a test_utils::TestLogger>
7368 fn bench_sends(bench: &mut Bencher) {
7369 bench_two_sends(bench, test_utils::TestPersister::new(), test_utils::TestPersister::new());
7372 pub fn bench_two_sends<P: Persist<InMemorySigner>>(bench: &mut Bencher, persister_a: P, persister_b: P) {
7373 // Do a simple benchmark of sending a payment back and forth between two nodes.
7374 // Note that this is unrealistic as each payment send will require at least two fsync
7376 let network = bitcoin::Network::Testnet;
7377 let genesis_hash = bitcoin::blockdata::constants::genesis_block(network).header.block_hash();
7379 let tx_broadcaster = test_utils::TestBroadcaster{txn_broadcasted: Mutex::new(Vec::new()), blocks: Arc::new(Mutex::new(Vec::new()))};
7380 let fee_estimator = test_utils::TestFeeEstimator { sat_per_kw: Mutex::new(253) };
7382 let mut config: UserConfig = Default::default();
7383 config.own_channel_config.minimum_depth = 1;
7385 let logger_a = test_utils::TestLogger::with_id("node a".to_owned());
7386 let chain_monitor_a = ChainMonitor::new(None, &tx_broadcaster, &logger_a, &fee_estimator, &persister_a);
7387 let seed_a = [1u8; 32];
7388 let keys_manager_a = KeysManager::new(&seed_a, 42, 42);
7389 let node_a = ChannelManager::new(&fee_estimator, &chain_monitor_a, &tx_broadcaster, &logger_a, &keys_manager_a, config.clone(), ChainParameters {
7391 best_block: BestBlock::from_genesis(network),
7393 let node_a_holder = NodeHolder { node: &node_a };
7395 let logger_b = test_utils::TestLogger::with_id("node a".to_owned());
7396 let chain_monitor_b = ChainMonitor::new(None, &tx_broadcaster, &logger_a, &fee_estimator, &persister_b);
7397 let seed_b = [2u8; 32];
7398 let keys_manager_b = KeysManager::new(&seed_b, 42, 42);
7399 let node_b = ChannelManager::new(&fee_estimator, &chain_monitor_b, &tx_broadcaster, &logger_b, &keys_manager_b, config.clone(), ChainParameters {
7401 best_block: BestBlock::from_genesis(network),
7403 let node_b_holder = NodeHolder { node: &node_b };
7405 node_a.peer_connected(&node_b.get_our_node_id(), &Init { features: InitFeatures::known(), remote_network_address: None });
7406 node_b.peer_connected(&node_a.get_our_node_id(), &Init { features: InitFeatures::known(), remote_network_address: None });
7407 node_a.create_channel(node_b.get_our_node_id(), 8_000_000, 100_000_000, 42, None).unwrap();
7408 node_b.handle_open_channel(&node_a.get_our_node_id(), InitFeatures::known(), &get_event_msg!(node_a_holder, MessageSendEvent::SendOpenChannel, node_b.get_our_node_id()));
7409 node_a.handle_accept_channel(&node_b.get_our_node_id(), InitFeatures::known(), &get_event_msg!(node_b_holder, MessageSendEvent::SendAcceptChannel, node_a.get_our_node_id()));
7412 if let Event::FundingGenerationReady { temporary_channel_id, output_script, .. } = get_event!(node_a_holder, Event::FundingGenerationReady) {
7413 tx = Transaction { version: 2, lock_time: 0, input: Vec::new(), output: vec![TxOut {
7414 value: 8_000_000, script_pubkey: output_script,
7416 node_a.funding_transaction_generated(&temporary_channel_id, tx.clone()).unwrap();
7417 } else { panic!(); }
7419 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()));
7420 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()));
7422 assert_eq!(&tx_broadcaster.txn_broadcasted.lock().unwrap()[..], &[tx.clone()]);
7425 header: BlockHeader { version: 0x20000000, prev_blockhash: genesis_hash, merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 },
7428 Listen::block_connected(&node_a, &block, 1);
7429 Listen::block_connected(&node_b, &block, 1);
7431 node_a.handle_funding_locked(&node_b.get_our_node_id(), &get_event_msg!(node_b_holder, MessageSendEvent::SendFundingLocked, node_a.get_our_node_id()));
7432 let msg_events = node_a.get_and_clear_pending_msg_events();
7433 assert_eq!(msg_events.len(), 2);
7434 match msg_events[0] {
7435 MessageSendEvent::SendFundingLocked { ref msg, .. } => {
7436 node_b.handle_funding_locked(&node_a.get_our_node_id(), msg);
7437 get_event_msg!(node_b_holder, MessageSendEvent::SendChannelUpdate, node_a.get_our_node_id());
7441 match msg_events[1] {
7442 MessageSendEvent::SendChannelUpdate { .. } => {},
7446 let dummy_graph = NetworkGraph::new(genesis_hash);
7448 let mut payment_count: u64 = 0;
7449 macro_rules! send_payment {
7450 ($node_a: expr, $node_b: expr) => {
7451 let usable_channels = $node_a.list_usable_channels();
7452 let payment_params = PaymentParameters::from_node_id($node_b.get_our_node_id())
7453 .with_features(InvoiceFeatures::known());
7454 let scorer = test_utils::TestScorer::with_penalty(0);
7455 let seed = [3u8; 32];
7456 let keys_manager = KeysManager::new(&seed, 42, 42);
7457 let random_seed_bytes = keys_manager.get_secure_random_bytes();
7458 let route = get_route(&$node_a.get_our_node_id(), &payment_params, &dummy_graph.read_only(),
7459 Some(&usable_channels.iter().map(|r| r).collect::<Vec<_>>()), 10_000, TEST_FINAL_CLTV, &logger_a, &scorer, &random_seed_bytes).unwrap();
7461 let mut payment_preimage = PaymentPreimage([0; 32]);
7462 payment_preimage.0[0..8].copy_from_slice(&payment_count.to_le_bytes());
7464 let payment_hash = PaymentHash(Sha256::hash(&payment_preimage.0[..]).into_inner());
7465 let payment_secret = $node_b.create_inbound_payment_for_hash(payment_hash, None, 7200).unwrap();
7467 $node_a.send_payment(&route, payment_hash, &Some(payment_secret)).unwrap();
7468 let payment_event = SendEvent::from_event($node_a.get_and_clear_pending_msg_events().pop().unwrap());
7469 $node_b.handle_update_add_htlc(&$node_a.get_our_node_id(), &payment_event.msgs[0]);
7470 $node_b.handle_commitment_signed(&$node_a.get_our_node_id(), &payment_event.commitment_msg);
7471 let (raa, cs) = get_revoke_commit_msgs!(NodeHolder { node: &$node_b }, $node_a.get_our_node_id());
7472 $node_a.handle_revoke_and_ack(&$node_b.get_our_node_id(), &raa);
7473 $node_a.handle_commitment_signed(&$node_b.get_our_node_id(), &cs);
7474 $node_b.handle_revoke_and_ack(&$node_a.get_our_node_id(), &get_event_msg!(NodeHolder { node: &$node_a }, MessageSendEvent::SendRevokeAndACK, $node_b.get_our_node_id()));
7476 expect_pending_htlcs_forwardable!(NodeHolder { node: &$node_b });
7477 expect_payment_received!(NodeHolder { node: &$node_b }, payment_hash, payment_secret, 10_000);
7478 assert!($node_b.claim_funds(payment_preimage));
7480 match $node_b.get_and_clear_pending_msg_events().pop().unwrap() {
7481 MessageSendEvent::UpdateHTLCs { node_id, updates } => {
7482 assert_eq!(node_id, $node_a.get_our_node_id());
7483 $node_a.handle_update_fulfill_htlc(&$node_b.get_our_node_id(), &updates.update_fulfill_htlcs[0]);
7484 $node_a.handle_commitment_signed(&$node_b.get_our_node_id(), &updates.commitment_signed);
7486 _ => panic!("Failed to generate claim event"),
7489 let (raa, cs) = get_revoke_commit_msgs!(NodeHolder { node: &$node_a }, $node_b.get_our_node_id());
7490 $node_b.handle_revoke_and_ack(&$node_a.get_our_node_id(), &raa);
7491 $node_b.handle_commitment_signed(&$node_a.get_our_node_id(), &cs);
7492 $node_a.handle_revoke_and_ack(&$node_b.get_our_node_id(), &get_event_msg!(NodeHolder { node: &$node_b }, MessageSendEvent::SendRevokeAndACK, $node_a.get_our_node_id()));
7494 expect_payment_sent!(NodeHolder { node: &$node_a }, payment_preimage);
7499 send_payment!(node_a, node_b);
7500 send_payment!(node_b, node_a);