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 use bitcoin::blockdata::constants::ChainHash;
11 use bitcoin::blockdata::script::{Script, ScriptBuf, Builder};
12 use bitcoin::blockdata::transaction::Transaction;
14 use bitcoin::sighash::EcdsaSighashType;
15 use bitcoin::consensus::encode;
17 use bitcoin::hashes::Hash;
18 use bitcoin::hashes::sha256::Hash as Sha256;
19 use bitcoin::hashes::sha256d::Hash as Sha256d;
20 use bitcoin::hash_types::{Txid, BlockHash};
22 use bitcoin::secp256k1::constants::PUBLIC_KEY_SIZE;
23 use bitcoin::secp256k1::{PublicKey,SecretKey};
24 use bitcoin::secp256k1::{Secp256k1,ecdsa::Signature};
25 use bitcoin::secp256k1;
27 use crate::ln::{ChannelId, PaymentPreimage, PaymentHash};
28 use crate::ln::features::{ChannelTypeFeatures, InitFeatures};
30 use crate::ln::msgs::DecodeError;
31 use crate::ln::script::{self, ShutdownScript};
32 use crate::ln::channelmanager::{self, CounterpartyForwardingInfo, PendingHTLCStatus, HTLCSource, SentHTLCId, HTLCFailureMsg, PendingHTLCInfo, RAACommitmentOrder, BREAKDOWN_TIMEOUT, MIN_CLTV_EXPIRY_DELTA, MAX_LOCAL_BREAKDOWN_TIMEOUT, ChannelShutdownState};
33 use crate::ln::chan_utils::{CounterpartyCommitmentSecrets, TxCreationKeys, HTLCOutputInCommitment, htlc_success_tx_weight, htlc_timeout_tx_weight, make_funding_redeemscript, ChannelPublicKeys, CommitmentTransaction, HolderCommitmentTransaction, ChannelTransactionParameters, CounterpartyChannelTransactionParameters, MAX_HTLCS, get_commitment_transaction_number_obscure_factor, ClosingTransaction};
34 use crate::ln::chan_utils;
35 use crate::ln::onion_utils::HTLCFailReason;
36 use crate::chain::BestBlock;
37 use crate::chain::chaininterface::{FeeEstimator, ConfirmationTarget, LowerBoundedFeeEstimator};
38 use crate::chain::channelmonitor::{ChannelMonitor, ChannelMonitorUpdate, ChannelMonitorUpdateStep, LATENCY_GRACE_PERIOD_BLOCKS, CLOSED_CHANNEL_UPDATE_ID};
39 use crate::chain::transaction::{OutPoint, TransactionData};
40 use crate::sign::ecdsa::{EcdsaChannelSigner, WriteableEcdsaChannelSigner};
41 use crate::sign::{EntropySource, ChannelSigner, SignerProvider, NodeSigner, Recipient};
42 use crate::events::ClosureReason;
43 use crate::routing::gossip::NodeId;
44 use crate::util::ser::{Readable, ReadableArgs, Writeable, Writer};
45 use crate::util::logger::{Logger, Record, WithContext};
46 use crate::util::errors::APIError;
47 use crate::util::config::{UserConfig, ChannelConfig, LegacyChannelConfig, ChannelHandshakeConfig, ChannelHandshakeLimits, MaxDustHTLCExposure};
48 use crate::util::scid_utils::scid_from_parts;
51 use crate::prelude::*;
52 use core::{cmp,mem,fmt};
53 use core::convert::TryInto;
55 #[cfg(any(test, fuzzing, debug_assertions))]
56 use crate::sync::Mutex;
57 use crate::sign::type_resolver::ChannelSignerType;
59 use super::channel_keys::{DelayedPaymentBasepoint, HtlcBasepoint, RevocationBasepoint};
62 pub struct ChannelValueStat {
63 pub value_to_self_msat: u64,
64 pub channel_value_msat: u64,
65 pub channel_reserve_msat: u64,
66 pub pending_outbound_htlcs_amount_msat: u64,
67 pub pending_inbound_htlcs_amount_msat: u64,
68 pub holding_cell_outbound_amount_msat: u64,
69 pub counterparty_max_htlc_value_in_flight_msat: u64, // outgoing
70 pub counterparty_dust_limit_msat: u64,
73 pub struct AvailableBalances {
74 /// The amount that would go to us if we close the channel, ignoring any on-chain fees.
75 pub balance_msat: u64,
76 /// Total amount available for our counterparty to send to us.
77 pub inbound_capacity_msat: u64,
78 /// Total amount available for us to send to our counterparty.
79 pub outbound_capacity_msat: u64,
80 /// The maximum value we can assign to the next outbound HTLC
81 pub next_outbound_htlc_limit_msat: u64,
82 /// The minimum value we can assign to the next outbound HTLC
83 pub next_outbound_htlc_minimum_msat: u64,
86 #[derive(Debug, Clone, Copy, PartialEq)]
88 // Inbound states mirroring InboundHTLCState
90 AwaitingRemoteRevokeToAnnounce,
91 // Note that we do not have a AwaitingAnnouncedRemoteRevoke variant here as it is universally
92 // handled the same as `Committed`, with the only exception in `InboundHTLCState` being the
93 // distinction of when we allow ourselves to forward the HTLC. Because we aren't "forwarding"
94 // the fee update anywhere, we can simply consider the fee update `Committed` immediately
95 // instead of setting it to AwaitingAnnouncedRemoteRevoke.
97 // Outbound state can only be `LocalAnnounced` or `Committed`
101 enum InboundHTLCRemovalReason {
102 FailRelay(msgs::OnionErrorPacket),
103 FailMalformed(([u8; 32], u16)),
104 Fulfill(PaymentPreimage),
107 enum InboundHTLCState {
108 /// Offered by remote, to be included in next local commitment tx. I.e., the remote sent an
109 /// update_add_htlc message for this HTLC.
110 RemoteAnnounced(PendingHTLCStatus),
111 /// Included in a received commitment_signed message (implying we've
112 /// revoke_and_ack'd it), but the remote hasn't yet revoked their previous
113 /// state (see the example below). We have not yet included this HTLC in a
114 /// commitment_signed message because we are waiting on the remote's
115 /// aforementioned state revocation. One reason this missing remote RAA
116 /// (revoke_and_ack) blocks us from constructing a commitment_signed message
117 /// is because every time we create a new "state", i.e. every time we sign a
118 /// new commitment tx (see [BOLT #2]), we need a new per_commitment_point,
119 /// which are provided one-at-a-time in each RAA. E.g., the last RAA they
120 /// sent provided the per_commitment_point for our current commitment tx.
121 /// The other reason we should not send a commitment_signed without their RAA
122 /// is because their RAA serves to ACK our previous commitment_signed.
124 /// Here's an example of how an HTLC could come to be in this state:
125 /// remote --> update_add_htlc(prev_htlc) --> local
126 /// remote --> commitment_signed(prev_htlc) --> local
127 /// remote <-- revoke_and_ack <-- local
128 /// remote <-- commitment_signed(prev_htlc) <-- local
129 /// [note that here, the remote does not respond with a RAA]
130 /// remote --> update_add_htlc(this_htlc) --> local
131 /// remote --> commitment_signed(prev_htlc, this_htlc) --> local
132 /// Now `this_htlc` will be assigned this state. It's unable to be officially
133 /// accepted, i.e. included in a commitment_signed, because we're missing the
134 /// RAA that provides our next per_commitment_point. The per_commitment_point
135 /// is used to derive commitment keys, which are used to construct the
136 /// signatures in a commitment_signed message.
137 /// Implies AwaitingRemoteRevoke.
139 /// [BOLT #2]: https://github.com/lightning/bolts/blob/master/02-peer-protocol.md
140 AwaitingRemoteRevokeToAnnounce(PendingHTLCStatus),
141 /// Included in a received commitment_signed message (implying we've revoke_and_ack'd it).
142 /// We have also included this HTLC in our latest commitment_signed and are now just waiting
143 /// on the remote's revoke_and_ack to make this HTLC an irrevocable part of the state of the
144 /// channel (before it can then get forwarded and/or removed).
145 /// Implies AwaitingRemoteRevoke.
146 AwaitingAnnouncedRemoteRevoke(PendingHTLCStatus),
148 /// Removed by us and a new commitment_signed was sent (if we were AwaitingRemoteRevoke when we
149 /// created it we would have put it in the holding cell instead). When they next revoke_and_ack
151 /// Note that we have to keep an eye on the HTLC until we've received a broadcastable
152 /// commitment transaction without it as otherwise we'll have to force-close the channel to
153 /// claim it before the timeout (obviously doesn't apply to revoked HTLCs that we can't claim
154 /// anyway). That said, ChannelMonitor does this for us (see
155 /// ChannelMonitor::should_broadcast_holder_commitment_txn) so we actually remove the HTLC from
156 /// our own local state before then, once we're sure that the next commitment_signed and
157 /// ChannelMonitor::provide_latest_local_commitment_tx will not include this HTLC.
158 LocalRemoved(InboundHTLCRemovalReason),
161 struct InboundHTLCOutput {
165 payment_hash: PaymentHash,
166 state: InboundHTLCState,
169 #[cfg_attr(test, derive(Clone, Debug, PartialEq))]
170 enum OutboundHTLCState {
171 /// Added by us and included in a commitment_signed (if we were AwaitingRemoteRevoke when we
172 /// created it we would have put it in the holding cell instead). When they next revoke_and_ack
173 /// we will promote to Committed (note that they may not accept it until the next time we
174 /// revoke, but we don't really care about that:
175 /// * they've revoked, so worst case we can announce an old state and get our (option on)
176 /// money back (though we won't), and,
177 /// * we'll send them a revoke when they send a commitment_signed, and since only they're
178 /// allowed to remove it, the "can only be removed once committed on both sides" requirement
179 /// doesn't matter to us and it's up to them to enforce it, worst-case they jump ahead but
180 /// we'll never get out of sync).
181 /// Note that we Box the OnionPacket as it's rather large and we don't want to blow up
182 /// OutboundHTLCOutput's size just for a temporary bit
183 LocalAnnounced(Box<msgs::OnionPacket>),
185 /// Remote removed this (outbound) HTLC. We're waiting on their commitment_signed to finalize
186 /// the change (though they'll need to revoke before we fail the payment).
187 RemoteRemoved(OutboundHTLCOutcome),
188 /// Remote removed this and sent a commitment_signed (implying we've revoke_and_ack'ed it), but
189 /// the remote side hasn't yet revoked their previous state, which we need them to do before we
190 /// can do any backwards failing. Implies AwaitingRemoteRevoke.
191 /// We also have not yet removed this HTLC in a commitment_signed message, and are waiting on a
192 /// remote revoke_and_ack on a previous state before we can do so.
193 AwaitingRemoteRevokeToRemove(OutboundHTLCOutcome),
194 /// Remote removed this and sent a commitment_signed (implying we've revoke_and_ack'ed it), but
195 /// the remote side hasn't yet revoked their previous state, which we need them to do before we
196 /// can do any backwards failing. Implies AwaitingRemoteRevoke.
197 /// We have removed this HTLC in our latest commitment_signed and are now just waiting on a
198 /// revoke_and_ack to drop completely.
199 AwaitingRemovedRemoteRevoke(OutboundHTLCOutcome),
203 #[cfg_attr(test, derive(Debug, PartialEq))]
204 enum OutboundHTLCOutcome {
205 /// LDK version 0.0.105+ will always fill in the preimage here.
206 Success(Option<PaymentPreimage>),
207 Failure(HTLCFailReason),
210 impl From<Option<HTLCFailReason>> for OutboundHTLCOutcome {
211 fn from(o: Option<HTLCFailReason>) -> Self {
213 None => OutboundHTLCOutcome::Success(None),
214 Some(r) => OutboundHTLCOutcome::Failure(r)
219 impl<'a> Into<Option<&'a HTLCFailReason>> for &'a OutboundHTLCOutcome {
220 fn into(self) -> Option<&'a HTLCFailReason> {
222 OutboundHTLCOutcome::Success(_) => None,
223 OutboundHTLCOutcome::Failure(ref r) => Some(r)
228 #[cfg_attr(test, derive(Clone, Debug, PartialEq))]
229 struct OutboundHTLCOutput {
233 payment_hash: PaymentHash,
234 state: OutboundHTLCState,
236 blinding_point: Option<PublicKey>,
237 skimmed_fee_msat: Option<u64>,
240 /// See AwaitingRemoteRevoke ChannelState for more info
241 #[cfg_attr(test, derive(Clone, Debug, PartialEq))]
242 enum HTLCUpdateAwaitingACK {
243 AddHTLC { // TODO: Time out if we're getting close to cltv_expiry
247 payment_hash: PaymentHash,
249 onion_routing_packet: msgs::OnionPacket,
250 // The extra fee we're skimming off the top of this HTLC.
251 skimmed_fee_msat: Option<u64>,
252 blinding_point: Option<PublicKey>,
255 payment_preimage: PaymentPreimage,
260 err_packet: msgs::OnionErrorPacket,
265 sha256_of_onion: [u8; 32],
269 macro_rules! define_state_flags {
270 ($flag_type_doc: expr, $flag_type: ident, [$(($flag_doc: expr, $flag: ident, $value: expr)),+], $extra_flags: expr) => {
271 #[doc = $flag_type_doc]
272 #[derive(Copy, Clone, Debug, PartialEq, PartialOrd, Eq)]
273 struct $flag_type(u32);
278 const $flag: $flag_type = $flag_type($value);
281 /// All flags that apply to the specified [`ChannelState`] variant.
283 const ALL: $flag_type = Self($(Self::$flag.0 | )* $extra_flags);
286 fn new() -> Self { Self(0) }
289 fn from_u32(flags: u32) -> Result<Self, ()> {
290 if flags & !Self::ALL.0 != 0 {
293 Ok($flag_type(flags))
298 fn is_empty(&self) -> bool { self.0 == 0 }
301 fn is_set(&self, flag: Self) -> bool { *self & flag == flag }
304 impl core::ops::Not for $flag_type {
306 fn not(self) -> Self::Output { Self(!self.0) }
308 impl core::ops::BitOr for $flag_type {
310 fn bitor(self, rhs: Self) -> Self::Output { Self(self.0 | rhs.0) }
312 impl core::ops::BitOrAssign for $flag_type {
313 fn bitor_assign(&mut self, rhs: Self) { self.0 |= rhs.0; }
315 impl core::ops::BitAnd for $flag_type {
317 fn bitand(self, rhs: Self) -> Self::Output { Self(self.0 & rhs.0) }
319 impl core::ops::BitAndAssign for $flag_type {
320 fn bitand_assign(&mut self, rhs: Self) { self.0 &= rhs.0; }
323 ($flag_type_doc: expr, $flag_type: ident, $flags: tt) => {
324 define_state_flags!($flag_type_doc, $flag_type, $flags, 0);
326 ($flag_type_doc: expr, FUNDED_STATE, $flag_type: ident, $flags: tt) => {
327 define_state_flags!($flag_type_doc, $flag_type, $flags, FundedStateFlags::ALL.0);
328 impl core::ops::BitOr<FundedStateFlags> for $flag_type {
330 fn bitor(self, rhs: FundedStateFlags) -> Self::Output { Self(self.0 | rhs.0) }
332 impl core::ops::BitOrAssign<FundedStateFlags> for $flag_type {
333 fn bitor_assign(&mut self, rhs: FundedStateFlags) { self.0 |= rhs.0; }
335 impl core::ops::BitAnd<FundedStateFlags> for $flag_type {
337 fn bitand(self, rhs: FundedStateFlags) -> Self::Output { Self(self.0 & rhs.0) }
339 impl core::ops::BitAndAssign<FundedStateFlags> for $flag_type {
340 fn bitand_assign(&mut self, rhs: FundedStateFlags) { self.0 &= rhs.0; }
342 impl PartialEq<FundedStateFlags> for $flag_type {
343 fn eq(&self, other: &FundedStateFlags) -> bool { self.0 == other.0 }
345 impl From<FundedStateFlags> for $flag_type {
346 fn from(flags: FundedStateFlags) -> Self { Self(flags.0) }
351 /// We declare all the states/flags here together to help determine which bits are still available
354 pub const OUR_INIT_SENT: u32 = 1 << 0;
355 pub const THEIR_INIT_SENT: u32 = 1 << 1;
356 pub const FUNDING_NEGOTIATED: u32 = 1 << 2;
357 pub const AWAITING_CHANNEL_READY: u32 = 1 << 3;
358 pub const THEIR_CHANNEL_READY: u32 = 1 << 4;
359 pub const OUR_CHANNEL_READY: u32 = 1 << 5;
360 pub const CHANNEL_READY: u32 = 1 << 6;
361 pub const PEER_DISCONNECTED: u32 = 1 << 7;
362 pub const MONITOR_UPDATE_IN_PROGRESS: u32 = 1 << 8;
363 pub const AWAITING_REMOTE_REVOKE: u32 = 1 << 9;
364 pub const REMOTE_SHUTDOWN_SENT: u32 = 1 << 10;
365 pub const LOCAL_SHUTDOWN_SENT: u32 = 1 << 11;
366 pub const SHUTDOWN_COMPLETE: u32 = 1 << 12;
367 pub const WAITING_FOR_BATCH: u32 = 1 << 13;
371 "Flags that apply to all [`ChannelState`] variants in which the channel is funded.",
373 ("Indicates the remote side is considered \"disconnected\" and no updates are allowed \
374 until after we've done a `channel_reestablish` dance.", PEER_DISCONNECTED, state_flags::PEER_DISCONNECTED),
375 ("Indicates the user has told us a `ChannelMonitor` update is pending async persistence \
376 somewhere and we should pause sending any outbound messages until they've managed to \
377 complete it.", MONITOR_UPDATE_IN_PROGRESS, state_flags::MONITOR_UPDATE_IN_PROGRESS),
378 ("Indicates we received a `shutdown` message from the remote end. If set, they may not add \
379 any new HTLCs to the channel, and we are expected to respond with our own `shutdown` \
380 message when possible.", REMOTE_SHUTDOWN_SENT, state_flags::REMOTE_SHUTDOWN_SENT),
381 ("Indicates we sent a `shutdown` message. At this point, we may not add any new HTLCs to \
382 the channel.", LOCAL_SHUTDOWN_SENT, state_flags::LOCAL_SHUTDOWN_SENT)
387 "Flags that only apply to [`ChannelState::NegotiatingFunding`].",
388 NegotiatingFundingFlags, [
389 ("Indicates we have (or are prepared to) send our `open_channel`/`accept_channel` message.",
390 OUR_INIT_SENT, state_flags::OUR_INIT_SENT),
391 ("Indicates we have received their `open_channel`/`accept_channel` message.",
392 THEIR_INIT_SENT, state_flags::THEIR_INIT_SENT)
397 "Flags that only apply to [`ChannelState::AwaitingChannelReady`].",
398 FUNDED_STATE, AwaitingChannelReadyFlags, [
399 ("Indicates they sent us a `channel_ready` message. Once both `THEIR_CHANNEL_READY` and \
400 `OUR_CHANNEL_READY` are set, our state moves on to `ChannelReady`.",
401 THEIR_CHANNEL_READY, state_flags::THEIR_CHANNEL_READY),
402 ("Indicates we sent them a `channel_ready` message. Once both `THEIR_CHANNEL_READY` and \
403 `OUR_CHANNEL_READY` are set, our state moves on to `ChannelReady`.",
404 OUR_CHANNEL_READY, state_flags::OUR_CHANNEL_READY),
405 ("Indicates the channel was funded in a batch and the broadcast of the funding transaction \
406 is being held until all channels in the batch have received `funding_signed` and have \
407 their monitors persisted.", WAITING_FOR_BATCH, state_flags::WAITING_FOR_BATCH)
412 "Flags that only apply to [`ChannelState::ChannelReady`].",
413 FUNDED_STATE, ChannelReadyFlags, [
414 ("Indicates that we have sent a `commitment_signed` but are awaiting the responding \
415 `revoke_and_ack` message. During this period, we can't generate new `commitment_signed` \
416 messages as we'd be unable to determine which HTLCs they included in their `revoke_and_ack` \
417 implicit ACK, so instead we have to hold them away temporarily to be sent later.",
418 AWAITING_REMOTE_REVOKE, state_flags::AWAITING_REMOTE_REVOKE)
422 #[derive(Copy, Clone, Debug, PartialEq, PartialOrd, Eq)]
424 /// We are negotiating the parameters required for the channel prior to funding it.
425 NegotiatingFunding(NegotiatingFundingFlags),
426 /// We have sent `funding_created` and are awaiting a `funding_signed` to advance to
427 /// `AwaitingChannelReady`. Note that this is nonsense for an inbound channel as we immediately generate
428 /// `funding_signed` upon receipt of `funding_created`, so simply skip this state.
430 /// We've received/sent `funding_created` and `funding_signed` and are thus now waiting on the
431 /// funding transaction to confirm.
432 AwaitingChannelReady(AwaitingChannelReadyFlags),
433 /// Both we and our counterparty consider the funding transaction confirmed and the channel is
435 ChannelReady(ChannelReadyFlags),
436 /// We've successfully negotiated a `closing_signed` dance. At this point, the `ChannelManager`
437 /// is about to drop us, but we store this anyway.
441 macro_rules! impl_state_flag {
442 ($get: ident, $set: ident, $clear: ident, $state_flag: expr, [$($state: ident),+]) => {
444 fn $get(&self) -> bool {
447 ChannelState::$state(flags) => flags.is_set($state_flag.into()),
456 ChannelState::$state(flags) => *flags |= $state_flag,
458 _ => debug_assert!(false, "Attempted to set flag on unexpected ChannelState"),
462 fn $clear(&mut self) {
465 ChannelState::$state(flags) => *flags &= !($state_flag),
467 _ => debug_assert!(false, "Attempted to clear flag on unexpected ChannelState"),
471 ($get: ident, $set: ident, $clear: ident, $state_flag: expr, FUNDED_STATES) => {
472 impl_state_flag!($get, $set, $clear, $state_flag, [AwaitingChannelReady, ChannelReady]);
474 ($get: ident, $set: ident, $clear: ident, $state_flag: expr, $state: ident) => {
475 impl_state_flag!($get, $set, $clear, $state_flag, [$state]);
480 fn from_u32(state: u32) -> Result<Self, ()> {
482 state_flags::FUNDING_NEGOTIATED => Ok(ChannelState::FundingNegotiated),
483 state_flags::SHUTDOWN_COMPLETE => Ok(ChannelState::ShutdownComplete),
485 if val & state_flags::AWAITING_CHANNEL_READY == state_flags::AWAITING_CHANNEL_READY {
486 AwaitingChannelReadyFlags::from_u32(val & !state_flags::AWAITING_CHANNEL_READY)
487 .map(|flags| ChannelState::AwaitingChannelReady(flags))
488 } else if val & state_flags::CHANNEL_READY == state_flags::CHANNEL_READY {
489 ChannelReadyFlags::from_u32(val & !state_flags::CHANNEL_READY)
490 .map(|flags| ChannelState::ChannelReady(flags))
491 } else if let Ok(flags) = NegotiatingFundingFlags::from_u32(val) {
492 Ok(ChannelState::NegotiatingFunding(flags))
500 fn to_u32(&self) -> u32 {
502 ChannelState::NegotiatingFunding(flags) => flags.0,
503 ChannelState::FundingNegotiated => state_flags::FUNDING_NEGOTIATED,
504 ChannelState::AwaitingChannelReady(flags) => state_flags::AWAITING_CHANNEL_READY | flags.0,
505 ChannelState::ChannelReady(flags) => state_flags::CHANNEL_READY | flags.0,
506 ChannelState::ShutdownComplete => state_flags::SHUTDOWN_COMPLETE,
510 fn is_pre_funded_state(&self) -> bool {
511 matches!(self, ChannelState::NegotiatingFunding(_)|ChannelState::FundingNegotiated)
514 fn is_both_sides_shutdown(&self) -> bool {
515 self.is_local_shutdown_sent() && self.is_remote_shutdown_sent()
518 fn with_funded_state_flags_mask(&self) -> FundedStateFlags {
520 ChannelState::AwaitingChannelReady(flags) => FundedStateFlags((*flags & FundedStateFlags::ALL).0),
521 ChannelState::ChannelReady(flags) => FundedStateFlags((*flags & FundedStateFlags::ALL).0),
522 _ => FundedStateFlags::new(),
526 fn should_force_holding_cell(&self) -> bool {
528 ChannelState::ChannelReady(flags) =>
529 flags.is_set(ChannelReadyFlags::AWAITING_REMOTE_REVOKE) ||
530 flags.is_set(FundedStateFlags::MONITOR_UPDATE_IN_PROGRESS.into()) ||
531 flags.is_set(FundedStateFlags::PEER_DISCONNECTED.into()),
533 debug_assert!(false, "The holding cell is only valid within ChannelReady");
539 impl_state_flag!(is_peer_disconnected, set_peer_disconnected, clear_peer_disconnected,
540 FundedStateFlags::PEER_DISCONNECTED, FUNDED_STATES);
541 impl_state_flag!(is_monitor_update_in_progress, set_monitor_update_in_progress, clear_monitor_update_in_progress,
542 FundedStateFlags::MONITOR_UPDATE_IN_PROGRESS, FUNDED_STATES);
543 impl_state_flag!(is_local_shutdown_sent, set_local_shutdown_sent, clear_local_shutdown_sent,
544 FundedStateFlags::LOCAL_SHUTDOWN_SENT, FUNDED_STATES);
545 impl_state_flag!(is_remote_shutdown_sent, set_remote_shutdown_sent, clear_remote_shutdown_sent,
546 FundedStateFlags::REMOTE_SHUTDOWN_SENT, FUNDED_STATES);
547 impl_state_flag!(is_our_channel_ready, set_our_channel_ready, clear_our_channel_ready,
548 AwaitingChannelReadyFlags::OUR_CHANNEL_READY, AwaitingChannelReady);
549 impl_state_flag!(is_their_channel_ready, set_their_channel_ready, clear_their_channel_ready,
550 AwaitingChannelReadyFlags::THEIR_CHANNEL_READY, AwaitingChannelReady);
551 impl_state_flag!(is_waiting_for_batch, set_waiting_for_batch, clear_waiting_for_batch,
552 AwaitingChannelReadyFlags::WAITING_FOR_BATCH, AwaitingChannelReady);
553 impl_state_flag!(is_awaiting_remote_revoke, set_awaiting_remote_revoke, clear_awaiting_remote_revoke,
554 ChannelReadyFlags::AWAITING_REMOTE_REVOKE, ChannelReady);
557 pub const INITIAL_COMMITMENT_NUMBER: u64 = (1 << 48) - 1;
559 pub const DEFAULT_MAX_HTLCS: u16 = 50;
561 pub(crate) fn commitment_tx_base_weight(channel_type_features: &ChannelTypeFeatures) -> u64 {
562 const COMMITMENT_TX_BASE_WEIGHT: u64 = 724;
563 const COMMITMENT_TX_BASE_ANCHOR_WEIGHT: u64 = 1124;
564 if channel_type_features.supports_anchors_zero_fee_htlc_tx() { COMMITMENT_TX_BASE_ANCHOR_WEIGHT } else { COMMITMENT_TX_BASE_WEIGHT }
568 const COMMITMENT_TX_WEIGHT_PER_HTLC: u64 = 172;
570 pub const COMMITMENT_TX_WEIGHT_PER_HTLC: u64 = 172;
572 pub const ANCHOR_OUTPUT_VALUE_SATOSHI: u64 = 330;
574 /// The percentage of the channel value `holder_max_htlc_value_in_flight_msat` used to be set to,
575 /// before this was made configurable. The percentage was made configurable in LDK 0.0.107,
576 /// although LDK 0.0.104+ enabled serialization of channels with a different value set for
577 /// `holder_max_htlc_value_in_flight_msat`.
578 pub const MAX_IN_FLIGHT_PERCENT_LEGACY: u8 = 10;
580 /// Maximum `funding_satoshis` value according to the BOLT #2 specification, if
581 /// `option_support_large_channel` (aka wumbo channels) is not supported.
583 pub const MAX_FUNDING_SATOSHIS_NO_WUMBO: u64 = (1 << 24) - 1;
585 /// Total bitcoin supply in satoshis.
586 pub const TOTAL_BITCOIN_SUPPLY_SATOSHIS: u64 = 21_000_000 * 1_0000_0000;
588 /// The maximum network dust limit for standard script formats. This currently represents the
589 /// minimum output value for a P2SH output before Bitcoin Core 22 considers the entire
590 /// transaction non-standard and thus refuses to relay it.
591 /// We also use this as the maximum counterparty `dust_limit_satoshis` allowed, given many
592 /// implementations use this value for their dust limit today.
593 pub const MAX_STD_OUTPUT_DUST_LIMIT_SATOSHIS: u64 = 546;
595 /// The maximum channel dust limit we will accept from our counterparty.
596 pub const MAX_CHAN_DUST_LIMIT_SATOSHIS: u64 = MAX_STD_OUTPUT_DUST_LIMIT_SATOSHIS;
598 /// The dust limit is used for both the commitment transaction outputs as well as the closing
599 /// transactions. For cooperative closing transactions, we require segwit outputs, though accept
600 /// *any* segwit scripts, which are allowed to be up to 42 bytes in length.
601 /// In order to avoid having to concern ourselves with standardness during the closing process, we
602 /// simply require our counterparty to use a dust limit which will leave any segwit output
604 /// See <https://github.com/lightning/bolts/issues/905> for more details.
605 pub const MIN_CHAN_DUST_LIMIT_SATOSHIS: u64 = 354;
607 // Just a reasonable implementation-specific safe lower bound, higher than the dust limit.
608 pub const MIN_THEIR_CHAN_RESERVE_SATOSHIS: u64 = 1000;
610 /// Used to return a simple Error back to ChannelManager. Will get converted to a
611 /// msgs::ErrorAction::SendErrorMessage or msgs::ErrorAction::IgnoreError as appropriate with our
612 /// channel_id in ChannelManager.
613 pub(super) enum ChannelError {
619 impl fmt::Debug for ChannelError {
620 fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
622 &ChannelError::Ignore(ref e) => write!(f, "Ignore : {}", e),
623 &ChannelError::Warn(ref e) => write!(f, "Warn : {}", e),
624 &ChannelError::Close(ref e) => write!(f, "Close : {}", e),
629 impl fmt::Display for ChannelError {
630 fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
632 &ChannelError::Ignore(ref e) => write!(f, "{}", e),
633 &ChannelError::Warn(ref e) => write!(f, "{}", e),
634 &ChannelError::Close(ref e) => write!(f, "{}", e),
639 pub(super) struct WithChannelContext<'a, L: Deref> where L::Target: Logger {
641 pub peer_id: Option<PublicKey>,
642 pub channel_id: Option<ChannelId>,
645 impl<'a, L: Deref> Logger for WithChannelContext<'a, L> where L::Target: Logger {
646 fn log(&self, mut record: Record) {
647 record.peer_id = self.peer_id;
648 record.channel_id = self.channel_id;
649 self.logger.log(record)
653 impl<'a, 'b, L: Deref> WithChannelContext<'a, L>
654 where L::Target: Logger {
655 pub(super) fn from<S: Deref>(logger: &'a L, context: &'b ChannelContext<S>) -> Self
656 where S::Target: SignerProvider
660 peer_id: Some(context.counterparty_node_id),
661 channel_id: Some(context.channel_id),
666 macro_rules! secp_check {
667 ($res: expr, $err: expr) => {
670 Err(_) => return Err(ChannelError::Close($err)),
675 /// The "channel disabled" bit in channel_update must be set based on whether we are connected to
676 /// our counterparty or not. However, we don't want to announce updates right away to avoid
677 /// spamming the network with updates if the connection is flapping. Instead, we "stage" updates to
678 /// our channel_update message and track the current state here.
679 /// See implementation at [`super::channelmanager::ChannelManager::timer_tick_occurred`].
680 #[derive(Clone, Copy, PartialEq)]
681 pub(super) enum ChannelUpdateStatus {
682 /// We've announced the channel as enabled and are connected to our peer.
684 /// Our channel is no longer live, but we haven't announced the channel as disabled yet.
686 /// Our channel is live again, but we haven't announced the channel as enabled yet.
688 /// We've announced the channel as disabled.
692 /// We track when we sent an `AnnouncementSignatures` to our peer in a few states, described here.
694 pub enum AnnouncementSigsState {
695 /// We have not sent our peer an `AnnouncementSignatures` yet, or our peer disconnected since
696 /// we sent the last `AnnouncementSignatures`.
698 /// We sent an `AnnouncementSignatures` to our peer since the last time our peer disconnected.
699 /// This state never appears on disk - instead we write `NotSent`.
701 /// We sent a `CommitmentSigned` after the last `AnnouncementSignatures` we sent. Because we
702 /// only ever have a single `CommitmentSigned` pending at once, if we sent one after sending
703 /// `AnnouncementSignatures` then we know the peer received our `AnnouncementSignatures` if
704 /// they send back a `RevokeAndACK`.
705 /// This state never appears on disk - instead we write `NotSent`.
707 /// We received a `RevokeAndACK`, effectively ack-ing our `AnnouncementSignatures`, at this
708 /// point we no longer need to re-send our `AnnouncementSignatures` again on reconnect.
712 /// An enum indicating whether the local or remote side offered a given HTLC.
718 /// An enum gathering stats on pending HTLCs, either inbound or outbound side.
721 pending_htlcs_value_msat: u64,
722 on_counterparty_tx_dust_exposure_msat: u64,
723 on_holder_tx_dust_exposure_msat: u64,
724 holding_cell_msat: u64,
725 on_holder_tx_holding_cell_htlcs_count: u32, // dust HTLCs *non*-included
728 /// An enum gathering stats on commitment transaction, either local or remote.
729 struct CommitmentStats<'a> {
730 tx: CommitmentTransaction, // the transaction info
731 feerate_per_kw: u32, // the feerate included to build the transaction
732 total_fee_sat: u64, // the total fee included in the transaction
733 num_nondust_htlcs: usize, // the number of HTLC outputs (dust HTLCs *non*-included)
734 htlcs_included: Vec<(HTLCOutputInCommitment, Option<&'a HTLCSource>)>, // the list of HTLCs (dust HTLCs *included*) which were not ignored when building the transaction
735 local_balance_msat: u64, // local balance before fees but considering dust limits
736 remote_balance_msat: u64, // remote balance before fees but considering dust limits
737 outbound_htlc_preimages: Vec<PaymentPreimage>, // preimages for successful offered HTLCs since last commitment
738 inbound_htlc_preimages: Vec<PaymentPreimage>, // preimages for successful received HTLCs since last commitment
741 /// Used when calculating whether we or the remote can afford an additional HTLC.
742 struct HTLCCandidate {
744 origin: HTLCInitiator,
748 fn new(amount_msat: u64, origin: HTLCInitiator) -> Self {
756 /// A return value enum for get_update_fulfill_htlc. See UpdateFulfillCommitFetch variants for
758 enum UpdateFulfillFetch {
760 monitor_update: ChannelMonitorUpdate,
761 htlc_value_msat: u64,
762 msg: Option<msgs::UpdateFulfillHTLC>,
767 /// The return type of get_update_fulfill_htlc_and_commit.
768 pub enum UpdateFulfillCommitFetch {
769 /// Indicates the HTLC fulfill is new, and either generated an update_fulfill message, placed
770 /// it in the holding cell, or re-generated the update_fulfill message after the same claim was
771 /// previously placed in the holding cell (and has since been removed).
773 /// The ChannelMonitorUpdate which places the new payment preimage in the channel monitor
774 monitor_update: ChannelMonitorUpdate,
775 /// The value of the HTLC which was claimed, in msat.
776 htlc_value_msat: u64,
778 /// Indicates the HTLC fulfill is duplicative and already existed either in the holding cell
779 /// or has been forgotten (presumably previously claimed).
783 /// The return value of `monitor_updating_restored`
784 pub(super) struct MonitorRestoreUpdates {
785 pub raa: Option<msgs::RevokeAndACK>,
786 pub commitment_update: Option<msgs::CommitmentUpdate>,
787 pub order: RAACommitmentOrder,
788 pub accepted_htlcs: Vec<(PendingHTLCInfo, u64)>,
789 pub failed_htlcs: Vec<(HTLCSource, PaymentHash, HTLCFailReason)>,
790 pub finalized_claimed_htlcs: Vec<HTLCSource>,
791 pub funding_broadcastable: Option<Transaction>,
792 pub channel_ready: Option<msgs::ChannelReady>,
793 pub announcement_sigs: Option<msgs::AnnouncementSignatures>,
796 /// The return value of `signer_maybe_unblocked`
798 pub(super) struct SignerResumeUpdates {
799 pub commitment_update: Option<msgs::CommitmentUpdate>,
800 pub funding_signed: Option<msgs::FundingSigned>,
801 pub channel_ready: Option<msgs::ChannelReady>,
804 /// The return value of `channel_reestablish`
805 pub(super) struct ReestablishResponses {
806 pub channel_ready: Option<msgs::ChannelReady>,
807 pub raa: Option<msgs::RevokeAndACK>,
808 pub commitment_update: Option<msgs::CommitmentUpdate>,
809 pub order: RAACommitmentOrder,
810 pub announcement_sigs: Option<msgs::AnnouncementSignatures>,
811 pub shutdown_msg: Option<msgs::Shutdown>,
814 /// The result of a shutdown that should be handled.
816 pub(crate) struct ShutdownResult {
817 /// A channel monitor update to apply.
818 pub(crate) monitor_update: Option<(PublicKey, OutPoint, ChannelMonitorUpdate)>,
819 /// A list of dropped outbound HTLCs that can safely be failed backwards immediately.
820 pub(crate) dropped_outbound_htlcs: Vec<(HTLCSource, PaymentHash, PublicKey, ChannelId)>,
821 /// An unbroadcasted batch funding transaction id. The closure of this channel should be
822 /// propagated to the remainder of the batch.
823 pub(crate) unbroadcasted_batch_funding_txid: Option<Txid>,
824 pub(crate) channel_id: ChannelId,
825 pub(crate) counterparty_node_id: PublicKey,
828 /// If the majority of the channels funds are to the fundee and the initiator holds only just
829 /// enough funds to cover their reserve value, channels are at risk of getting "stuck". Because the
830 /// initiator controls the feerate, if they then go to increase the channel fee, they may have no
831 /// balance but the fundee is unable to send a payment as the increase in fee more than drains
832 /// their reserve value. Thus, neither side can send a new HTLC and the channel becomes useless.
833 /// Thus, before sending an HTLC when we are the initiator, we check that the feerate can increase
834 /// by this multiple without hitting this case, before sending.
835 /// This multiple is effectively the maximum feerate "jump" we expect until more HTLCs flow over
836 /// the channel. Sadly, there isn't really a good number for this - if we expect to have no new
837 /// HTLCs for days we may need this to suffice for feerate increases across days, but that may
838 /// leave the channel less usable as we hold a bigger reserve.
839 #[cfg(any(fuzzing, test))]
840 pub const FEE_SPIKE_BUFFER_FEE_INCREASE_MULTIPLE: u64 = 2;
841 #[cfg(not(any(fuzzing, test)))]
842 const FEE_SPIKE_BUFFER_FEE_INCREASE_MULTIPLE: u64 = 2;
844 /// If we fail to see a funding transaction confirmed on-chain within this many blocks after the
845 /// channel creation on an inbound channel, we simply force-close and move on.
846 /// This constant is the one suggested in BOLT 2.
847 pub(crate) const FUNDING_CONF_DEADLINE_BLOCKS: u32 = 2016;
849 /// In case of a concurrent update_add_htlc proposed by our counterparty, we might
850 /// not have enough balance value remaining to cover the onchain cost of this new
851 /// HTLC weight. If this happens, our counterparty fails the reception of our
852 /// commitment_signed including this new HTLC due to infringement on the channel
854 /// To prevent this case, we compute our outbound update_fee with an HTLC buffer of
855 /// size 2. However, if the number of concurrent update_add_htlc is higher, this still
856 /// leads to a channel force-close. Ultimately, this is an issue coming from the
857 /// design of LN state machines, allowing asynchronous updates.
858 pub(crate) const CONCURRENT_INBOUND_HTLC_FEE_BUFFER: u32 = 2;
860 /// When a channel is opened, we check that the funding amount is enough to pay for relevant
861 /// commitment transaction fees, with at least this many HTLCs present on the commitment
862 /// transaction (not counting the value of the HTLCs themselves).
863 pub(crate) const MIN_AFFORDABLE_HTLC_COUNT: usize = 4;
865 /// When a [`Channel`] has its [`ChannelConfig`] updated, its existing one is stashed for up to this
866 /// number of ticks to allow forwarding HTLCs by nodes that have yet to receive the new
867 /// ChannelUpdate prompted by the config update. This value was determined as follows:
869 /// * The expected interval between ticks (1 minute).
870 /// * The average convergence delay of updates across the network, i.e., ~300 seconds on average
871 /// for a node to see an update as seen on `<https://arxiv.org/pdf/2205.12737.pdf>`.
872 /// * `EXPIRE_PREV_CONFIG_TICKS` = convergence_delay / tick_interval
873 pub(crate) const EXPIRE_PREV_CONFIG_TICKS: usize = 5;
875 /// The number of ticks that may elapse while we're waiting for a response to a
876 /// [`msgs::RevokeAndACK`] or [`msgs::ChannelReestablish`] message before we attempt to disconnect
879 /// See [`ChannelContext::sent_message_awaiting_response`] for more information.
880 pub(crate) const DISCONNECT_PEER_AWAITING_RESPONSE_TICKS: usize = 2;
882 /// The number of ticks that may elapse while we're waiting for an unfunded outbound/inbound channel
883 /// to be promoted to a [`Channel`] since the unfunded channel was created. An unfunded channel
884 /// exceeding this age limit will be force-closed and purged from memory.
885 pub(crate) const UNFUNDED_CHANNEL_AGE_LIMIT_TICKS: usize = 60;
887 /// Number of blocks needed for an output from a coinbase transaction to be spendable.
888 pub(crate) const COINBASE_MATURITY: u32 = 100;
890 struct PendingChannelMonitorUpdate {
891 update: ChannelMonitorUpdate,
894 impl_writeable_tlv_based!(PendingChannelMonitorUpdate, {
895 (0, update, required),
898 /// The `ChannelPhase` enum describes the current phase in life of a lightning channel with each of
899 /// its variants containing an appropriate channel struct.
900 pub(super) enum ChannelPhase<SP: Deref> where SP::Target: SignerProvider {
901 UnfundedOutboundV1(OutboundV1Channel<SP>),
902 UnfundedInboundV1(InboundV1Channel<SP>),
906 impl<'a, SP: Deref> ChannelPhase<SP> where
907 SP::Target: SignerProvider,
908 <SP::Target as SignerProvider>::EcdsaSigner: ChannelSigner,
910 pub fn context(&'a self) -> &'a ChannelContext<SP> {
912 ChannelPhase::Funded(chan) => &chan.context,
913 ChannelPhase::UnfundedOutboundV1(chan) => &chan.context,
914 ChannelPhase::UnfundedInboundV1(chan) => &chan.context,
918 pub fn context_mut(&'a mut self) -> &'a mut ChannelContext<SP> {
920 ChannelPhase::Funded(ref mut chan) => &mut chan.context,
921 ChannelPhase::UnfundedOutboundV1(ref mut chan) => &mut chan.context,
922 ChannelPhase::UnfundedInboundV1(ref mut chan) => &mut chan.context,
927 /// Contains all state common to unfunded inbound/outbound channels.
928 pub(super) struct UnfundedChannelContext {
929 /// A counter tracking how many ticks have elapsed since this unfunded channel was
930 /// created. If this unfunded channel reaches peer has yet to respond after reaching
931 /// `UNFUNDED_CHANNEL_AGE_LIMIT_TICKS`, it will be force-closed and purged from memory.
933 /// This is so that we don't keep channels around that haven't progressed to a funded state
934 /// in a timely manner.
935 unfunded_channel_age_ticks: usize,
938 impl UnfundedChannelContext {
939 /// Determines whether we should force-close and purge this unfunded channel from memory due to it
940 /// having reached the unfunded channel age limit.
942 /// This should be called on every [`super::channelmanager::ChannelManager::timer_tick_occurred`].
943 pub fn should_expire_unfunded_channel(&mut self) -> bool {
944 self.unfunded_channel_age_ticks += 1;
945 self.unfunded_channel_age_ticks >= UNFUNDED_CHANNEL_AGE_LIMIT_TICKS
949 /// Contains everything about the channel including state, and various flags.
950 pub(super) struct ChannelContext<SP: Deref> where SP::Target: SignerProvider {
951 config: LegacyChannelConfig,
953 // Track the previous `ChannelConfig` so that we can continue forwarding HTLCs that were
954 // constructed using it. The second element in the tuple corresponds to the number of ticks that
955 // have elapsed since the update occurred.
956 prev_config: Option<(ChannelConfig, usize)>,
958 inbound_handshake_limits_override: Option<ChannelHandshakeLimits>,
962 /// The current channel ID.
963 channel_id: ChannelId,
964 /// The temporary channel ID used during channel setup. Value kept even after transitioning to a final channel ID.
965 /// Will be `None` for channels created prior to 0.0.115.
966 temporary_channel_id: Option<ChannelId>,
967 channel_state: ChannelState,
969 // When we reach max(6 blocks, minimum_depth), we need to send an AnnouncementSigs message to
970 // our peer. However, we want to make sure they received it, or else rebroadcast it when we
972 // We do so here, see `AnnouncementSigsSent` for more details on the state(s).
973 // Note that a number of our tests were written prior to the behavior here which retransmits
974 // AnnouncementSignatures until after an RAA completes, so the behavior is short-circuited in
976 #[cfg(any(test, feature = "_test_utils"))]
977 pub(crate) announcement_sigs_state: AnnouncementSigsState,
978 #[cfg(not(any(test, feature = "_test_utils")))]
979 announcement_sigs_state: AnnouncementSigsState,
981 secp_ctx: Secp256k1<secp256k1::All>,
982 channel_value_satoshis: u64,
984 latest_monitor_update_id: u64,
986 holder_signer: ChannelSignerType<SP>,
987 shutdown_scriptpubkey: Option<ShutdownScript>,
988 destination_script: ScriptBuf,
990 // Our commitment numbers start at 2^48-1 and count down, whereas the ones used in transaction
991 // generation start at 0 and count up...this simplifies some parts of implementation at the
992 // cost of others, but should really just be changed.
994 cur_holder_commitment_transaction_number: u64,
995 cur_counterparty_commitment_transaction_number: u64,
996 value_to_self_msat: u64, // Excluding all pending_htlcs, fees, and anchor outputs
997 pending_inbound_htlcs: Vec<InboundHTLCOutput>,
998 pending_outbound_htlcs: Vec<OutboundHTLCOutput>,
999 holding_cell_htlc_updates: Vec<HTLCUpdateAwaitingACK>,
1001 /// When resending CS/RAA messages on channel monitor restoration or on reconnect, we always
1002 /// need to ensure we resend them in the order we originally generated them. Note that because
1003 /// there can only ever be one in-flight CS and/or one in-flight RAA at any time, it is
1004 /// sufficient to simply set this to the opposite of any message we are generating as we
1005 /// generate it. ie when we generate a CS, we set this to RAAFirst as, if there is a pending
1006 /// in-flight RAA to resend, it will have been the first thing we generated, and thus we should
1008 resend_order: RAACommitmentOrder,
1010 monitor_pending_channel_ready: bool,
1011 monitor_pending_revoke_and_ack: bool,
1012 monitor_pending_commitment_signed: bool,
1014 // TODO: If a channel is drop'd, we don't know whether the `ChannelMonitor` is ultimately
1015 // responsible for some of the HTLCs here or not - we don't know whether the update in question
1016 // completed or not. We currently ignore these fields entirely when force-closing a channel,
1017 // but need to handle this somehow or we run the risk of losing HTLCs!
1018 monitor_pending_forwards: Vec<(PendingHTLCInfo, u64)>,
1019 monitor_pending_failures: Vec<(HTLCSource, PaymentHash, HTLCFailReason)>,
1020 monitor_pending_finalized_fulfills: Vec<HTLCSource>,
1022 /// If we went to send a commitment update (ie some messages then [`msgs::CommitmentSigned`])
1023 /// but our signer (initially) refused to give us a signature, we should retry at some point in
1024 /// the future when the signer indicates it may have a signature for us.
1026 /// This flag is set in such a case. Note that we don't need to persist this as we'll end up
1027 /// setting it again as a side-effect of [`Channel::channel_reestablish`].
1028 signer_pending_commitment_update: bool,
1029 /// Similar to [`Self::signer_pending_commitment_update`] but we're waiting to send either a
1030 /// [`msgs::FundingCreated`] or [`msgs::FundingSigned`] depending on if this channel is
1031 /// outbound or inbound.
1032 signer_pending_funding: bool,
1034 // pending_update_fee is filled when sending and receiving update_fee.
1036 // Because it follows the same commitment flow as HTLCs, `FeeUpdateState` is either `Outbound`
1037 // or matches a subset of the `InboundHTLCOutput` variants. It is then updated/used when
1038 // generating new commitment transactions with exactly the same criteria as inbound/outbound
1039 // HTLCs with similar state.
1040 pending_update_fee: Option<(u32, FeeUpdateState)>,
1041 // If a `send_update_fee()` call is made with ChannelState::AwaitingRemoteRevoke set, we place
1042 // it here instead of `pending_update_fee` in the same way as we place outbound HTLC updates in
1043 // `holding_cell_htlc_updates` instead of `pending_outbound_htlcs`. It is released into
1044 // `pending_update_fee` with the same criteria as outbound HTLC updates but can be updated by
1045 // further `send_update_fee` calls, dropping the previous holding cell update entirely.
1046 holding_cell_update_fee: Option<u32>,
1047 next_holder_htlc_id: u64,
1048 next_counterparty_htlc_id: u64,
1049 feerate_per_kw: u32,
1051 /// The timestamp set on our latest `channel_update` message for this channel. It is updated
1052 /// when the channel is updated in ways which may impact the `channel_update` message or when a
1053 /// new block is received, ensuring it's always at least moderately close to the current real
1055 update_time_counter: u32,
1057 #[cfg(debug_assertions)]
1058 /// Max to_local and to_remote outputs in a locally-generated commitment transaction
1059 holder_max_commitment_tx_output: Mutex<(u64, u64)>,
1060 #[cfg(debug_assertions)]
1061 /// Max to_local and to_remote outputs in a remote-generated commitment transaction
1062 counterparty_max_commitment_tx_output: Mutex<(u64, u64)>,
1064 last_sent_closing_fee: Option<(u64, Signature)>, // (fee, holder_sig)
1065 target_closing_feerate_sats_per_kw: Option<u32>,
1067 /// If our counterparty sent us a closing_signed while we were waiting for a `ChannelMonitor`
1068 /// update, we need to delay processing it until later. We do that here by simply storing the
1069 /// closing_signed message and handling it in `maybe_propose_closing_signed`.
1070 pending_counterparty_closing_signed: Option<msgs::ClosingSigned>,
1072 /// The minimum and maximum absolute fee, in satoshis, we are willing to place on the closing
1073 /// transaction. These are set once we reach `closing_negotiation_ready`.
1075 pub(crate) closing_fee_limits: Option<(u64, u64)>,
1077 closing_fee_limits: Option<(u64, u64)>,
1079 /// If we remove an HTLC (or fee update), commit, and receive our counterparty's
1080 /// `revoke_and_ack`, we remove all knowledge of said HTLC (or fee update). However, the latest
1081 /// local commitment transaction that we can broadcast still contains the HTLC (or old fee)
1082 /// until we receive a further `commitment_signed`. Thus we are not eligible for initiating the
1083 /// `closing_signed` negotiation if we're expecting a counterparty `commitment_signed`.
1085 /// To ensure we don't send a `closing_signed` too early, we track this state here, waiting
1086 /// until we see a `commitment_signed` before doing so.
1088 /// We don't bother to persist this - we anticipate this state won't last longer than a few
1089 /// milliseconds, so any accidental force-closes here should be exceedingly rare.
1090 expecting_peer_commitment_signed: bool,
1092 /// The hash of the block in which the funding transaction was included.
1093 funding_tx_confirmed_in: Option<BlockHash>,
1094 funding_tx_confirmation_height: u32,
1095 short_channel_id: Option<u64>,
1096 /// Either the height at which this channel was created or the height at which it was last
1097 /// serialized if it was serialized by versions prior to 0.0.103.
1098 /// We use this to close if funding is never broadcasted.
1099 channel_creation_height: u32,
1101 counterparty_dust_limit_satoshis: u64,
1104 pub(super) holder_dust_limit_satoshis: u64,
1106 holder_dust_limit_satoshis: u64,
1109 pub(super) counterparty_max_htlc_value_in_flight_msat: u64,
1111 counterparty_max_htlc_value_in_flight_msat: u64,
1114 pub(super) holder_max_htlc_value_in_flight_msat: u64,
1116 holder_max_htlc_value_in_flight_msat: u64,
1118 /// minimum channel reserve for self to maintain - set by them.
1119 counterparty_selected_channel_reserve_satoshis: Option<u64>,
1122 pub(super) holder_selected_channel_reserve_satoshis: u64,
1124 holder_selected_channel_reserve_satoshis: u64,
1126 counterparty_htlc_minimum_msat: u64,
1127 holder_htlc_minimum_msat: u64,
1129 pub counterparty_max_accepted_htlcs: u16,
1131 counterparty_max_accepted_htlcs: u16,
1132 holder_max_accepted_htlcs: u16,
1133 minimum_depth: Option<u32>,
1135 counterparty_forwarding_info: Option<CounterpartyForwardingInfo>,
1137 pub(crate) channel_transaction_parameters: ChannelTransactionParameters,
1138 funding_transaction: Option<Transaction>,
1139 is_batch_funding: Option<()>,
1141 counterparty_cur_commitment_point: Option<PublicKey>,
1142 counterparty_prev_commitment_point: Option<PublicKey>,
1143 counterparty_node_id: PublicKey,
1145 counterparty_shutdown_scriptpubkey: Option<ScriptBuf>,
1147 commitment_secrets: CounterpartyCommitmentSecrets,
1149 channel_update_status: ChannelUpdateStatus,
1150 /// Once we reach `closing_negotiation_ready`, we set this, indicating if closing_signed does
1151 /// not complete within a single timer tick (one minute), we should force-close the channel.
1152 /// This prevents us from keeping unusable channels around forever if our counterparty wishes
1154 /// Note that this field is reset to false on deserialization to give us a chance to connect to
1155 /// our peer and start the closing_signed negotiation fresh.
1156 closing_signed_in_flight: bool,
1158 /// Our counterparty's channel_announcement signatures provided in announcement_signatures.
1159 /// This can be used to rebroadcast the channel_announcement message later.
1160 announcement_sigs: Option<(Signature, Signature)>,
1162 // We save these values so we can make sure `next_local_commit_tx_fee_msat` and
1163 // `next_remote_commit_tx_fee_msat` properly predict what the next commitment transaction fee will
1164 // be, by comparing the cached values to the fee of the tranaction generated by
1165 // `build_commitment_transaction`.
1166 #[cfg(any(test, fuzzing))]
1167 next_local_commitment_tx_fee_info_cached: Mutex<Option<CommitmentTxInfoCached>>,
1168 #[cfg(any(test, fuzzing))]
1169 next_remote_commitment_tx_fee_info_cached: Mutex<Option<CommitmentTxInfoCached>>,
1171 /// lnd has a long-standing bug where, upon reconnection, if the channel is not yet confirmed
1172 /// they will not send a channel_reestablish until the channel locks in. Then, they will send a
1173 /// channel_ready *before* sending the channel_reestablish (which is clearly a violation of
1174 /// the BOLT specs). We copy c-lightning's workaround here and simply store the channel_ready
1175 /// message until we receive a channel_reestablish.
1177 /// See-also <https://github.com/lightningnetwork/lnd/issues/4006>
1178 pub workaround_lnd_bug_4006: Option<msgs::ChannelReady>,
1180 /// An option set when we wish to track how many ticks have elapsed while waiting for a response
1181 /// from our counterparty after sending a message. If the peer has yet to respond after reaching
1182 /// `DISCONNECT_PEER_AWAITING_RESPONSE_TICKS`, a reconnection should be attempted to try to
1183 /// unblock the state machine.
1185 /// This behavior is mostly motivated by a lnd bug in which we don't receive a message we expect
1186 /// to in a timely manner, which may lead to channels becoming unusable and/or force-closed. An
1187 /// example of such can be found at <https://github.com/lightningnetwork/lnd/issues/7682>.
1189 /// This is currently only used when waiting for a [`msgs::ChannelReestablish`] or
1190 /// [`msgs::RevokeAndACK`] message from the counterparty.
1191 sent_message_awaiting_response: Option<usize>,
1193 #[cfg(any(test, fuzzing))]
1194 // When we receive an HTLC fulfill on an outbound path, we may immediately fulfill the
1195 // corresponding HTLC on the inbound path. If, then, the outbound path channel is
1196 // disconnected and reconnected (before we've exchange commitment_signed and revoke_and_ack
1197 // messages), they may re-broadcast their update_fulfill_htlc, causing a duplicate claim. This
1198 // is fine, but as a sanity check in our failure to generate the second claim, we check here
1199 // that the original was a claim, and that we aren't now trying to fulfill a failed HTLC.
1200 historical_inbound_htlc_fulfills: HashSet<u64>,
1202 /// This channel's type, as negotiated during channel open
1203 channel_type: ChannelTypeFeatures,
1205 // Our counterparty can offer us SCID aliases which they will map to this channel when routing
1206 // outbound payments. These can be used in invoice route hints to avoid explicitly revealing
1207 // the channel's funding UTXO.
1209 // We also use this when sending our peer a channel_update that isn't to be broadcasted
1210 // publicly - allowing them to re-use their map of SCID -> channel for channel_update ->
1211 // associated channel mapping.
1213 // We only bother storing the most recent SCID alias at any time, though our counterparty has
1214 // to store all of them.
1215 latest_inbound_scid_alias: Option<u64>,
1217 // We always offer our counterparty a static SCID alias, which we recognize as for this channel
1218 // if we see it in HTLC forwarding instructions. We don't bother rotating the alias given we
1219 // don't currently support node id aliases and eventually privacy should be provided with
1220 // blinded paths instead of simple scid+node_id aliases.
1221 outbound_scid_alias: u64,
1223 // We track whether we already emitted a `ChannelPending` event.
1224 channel_pending_event_emitted: bool,
1226 // We track whether we already emitted a `ChannelReady` event.
1227 channel_ready_event_emitted: bool,
1229 /// The unique identifier used to re-derive the private key material for the channel through
1230 /// [`SignerProvider::derive_channel_signer`].
1231 channel_keys_id: [u8; 32],
1233 /// If we can't release a [`ChannelMonitorUpdate`] until some external action completes, we
1234 /// store it here and only release it to the `ChannelManager` once it asks for it.
1235 blocked_monitor_updates: Vec<PendingChannelMonitorUpdate>,
1238 impl<SP: Deref> ChannelContext<SP> where SP::Target: SignerProvider {
1239 /// Allowed in any state (including after shutdown)
1240 pub fn get_update_time_counter(&self) -> u32 {
1241 self.update_time_counter
1244 pub fn get_latest_monitor_update_id(&self) -> u64 {
1245 self.latest_monitor_update_id
1248 pub fn should_announce(&self) -> bool {
1249 self.config.announced_channel
1252 pub fn is_outbound(&self) -> bool {
1253 self.channel_transaction_parameters.is_outbound_from_holder
1256 /// Gets the fee we'd want to charge for adding an HTLC output to this Channel
1257 /// Allowed in any state (including after shutdown)
1258 pub fn get_outbound_forwarding_fee_base_msat(&self) -> u32 {
1259 self.config.options.forwarding_fee_base_msat
1262 /// Returns true if we've ever received a message from the remote end for this Channel
1263 pub fn have_received_message(&self) -> bool {
1264 self.channel_state > ChannelState::NegotiatingFunding(NegotiatingFundingFlags::OUR_INIT_SENT)
1267 /// Returns true if this channel is fully established and not known to be closing.
1268 /// Allowed in any state (including after shutdown)
1269 pub fn is_usable(&self) -> bool {
1270 matches!(self.channel_state, ChannelState::ChannelReady(_)) &&
1271 !self.channel_state.is_local_shutdown_sent() &&
1272 !self.channel_state.is_remote_shutdown_sent() &&
1273 !self.monitor_pending_channel_ready
1276 /// shutdown state returns the state of the channel in its various stages of shutdown
1277 pub fn shutdown_state(&self) -> ChannelShutdownState {
1278 match self.channel_state {
1279 ChannelState::AwaitingChannelReady(_)|ChannelState::ChannelReady(_) =>
1280 if self.channel_state.is_local_shutdown_sent() && !self.channel_state.is_remote_shutdown_sent() {
1281 ChannelShutdownState::ShutdownInitiated
1282 } else if (self.channel_state.is_local_shutdown_sent() || self.channel_state.is_remote_shutdown_sent()) && !self.closing_negotiation_ready() {
1283 ChannelShutdownState::ResolvingHTLCs
1284 } else if (self.channel_state.is_local_shutdown_sent() || self.channel_state.is_remote_shutdown_sent()) && self.closing_negotiation_ready() {
1285 ChannelShutdownState::NegotiatingClosingFee
1287 ChannelShutdownState::NotShuttingDown
1289 ChannelState::ShutdownComplete => ChannelShutdownState::ShutdownComplete,
1290 _ => ChannelShutdownState::NotShuttingDown,
1294 fn closing_negotiation_ready(&self) -> bool {
1295 let is_ready_to_close = match self.channel_state {
1296 ChannelState::AwaitingChannelReady(flags) =>
1297 flags & FundedStateFlags::ALL == FundedStateFlags::LOCAL_SHUTDOWN_SENT | FundedStateFlags::REMOTE_SHUTDOWN_SENT,
1298 ChannelState::ChannelReady(flags) =>
1299 flags == FundedStateFlags::LOCAL_SHUTDOWN_SENT | FundedStateFlags::REMOTE_SHUTDOWN_SENT,
1302 self.pending_inbound_htlcs.is_empty() &&
1303 self.pending_outbound_htlcs.is_empty() &&
1304 self.pending_update_fee.is_none() &&
1308 /// Returns true if this channel is currently available for use. This is a superset of
1309 /// is_usable() and considers things like the channel being temporarily disabled.
1310 /// Allowed in any state (including after shutdown)
1311 pub fn is_live(&self) -> bool {
1312 self.is_usable() && !self.channel_state.is_peer_disconnected()
1315 // Public utilities:
1317 pub fn channel_id(&self) -> ChannelId {
1321 // Return the `temporary_channel_id` used during channel establishment.
1323 // Will return `None` for channels created prior to LDK version 0.0.115.
1324 pub fn temporary_channel_id(&self) -> Option<ChannelId> {
1325 self.temporary_channel_id
1328 pub fn minimum_depth(&self) -> Option<u32> {
1332 /// Gets the "user_id" value passed into the construction of this channel. It has no special
1333 /// meaning and exists only to allow users to have a persistent identifier of a channel.
1334 pub fn get_user_id(&self) -> u128 {
1338 /// Gets the channel's type
1339 pub fn get_channel_type(&self) -> &ChannelTypeFeatures {
1343 /// Gets the channel's `short_channel_id`.
1345 /// Will return `None` if the channel hasn't been confirmed yet.
1346 pub fn get_short_channel_id(&self) -> Option<u64> {
1347 self.short_channel_id
1350 /// Allowed in any state (including after shutdown)
1351 pub fn latest_inbound_scid_alias(&self) -> Option<u64> {
1352 self.latest_inbound_scid_alias
1355 /// Allowed in any state (including after shutdown)
1356 pub fn outbound_scid_alias(&self) -> u64 {
1357 self.outbound_scid_alias
1360 /// Returns the holder signer for this channel.
1362 pub fn get_signer(&self) -> &ChannelSignerType<SP> {
1363 return &self.holder_signer
1366 /// Only allowed immediately after deserialization if get_outbound_scid_alias returns 0,
1367 /// indicating we were written by LDK prior to 0.0.106 which did not set outbound SCID aliases
1368 /// or prior to any channel actions during `Channel` initialization.
1369 pub fn set_outbound_scid_alias(&mut self, outbound_scid_alias: u64) {
1370 debug_assert_eq!(self.outbound_scid_alias, 0);
1371 self.outbound_scid_alias = outbound_scid_alias;
1374 /// Returns the funding_txo we either got from our peer, or were given by
1375 /// get_funding_created.
1376 pub fn get_funding_txo(&self) -> Option<OutPoint> {
1377 self.channel_transaction_parameters.funding_outpoint
1380 /// Returns the height in which our funding transaction was confirmed.
1381 pub fn get_funding_tx_confirmation_height(&self) -> Option<u32> {
1382 let conf_height = self.funding_tx_confirmation_height;
1383 if conf_height > 0 {
1390 /// Returns the block hash in which our funding transaction was confirmed.
1391 pub fn get_funding_tx_confirmed_in(&self) -> Option<BlockHash> {
1392 self.funding_tx_confirmed_in
1395 /// Returns the current number of confirmations on the funding transaction.
1396 pub fn get_funding_tx_confirmations(&self, height: u32) -> u32 {
1397 if self.funding_tx_confirmation_height == 0 {
1398 // We either haven't seen any confirmation yet, or observed a reorg.
1402 height.checked_sub(self.funding_tx_confirmation_height).map_or(0, |c| c + 1)
1405 fn get_holder_selected_contest_delay(&self) -> u16 {
1406 self.channel_transaction_parameters.holder_selected_contest_delay
1409 fn get_holder_pubkeys(&self) -> &ChannelPublicKeys {
1410 &self.channel_transaction_parameters.holder_pubkeys
1413 pub fn get_counterparty_selected_contest_delay(&self) -> Option<u16> {
1414 self.channel_transaction_parameters.counterparty_parameters
1415 .as_ref().map(|params| params.selected_contest_delay)
1418 fn get_counterparty_pubkeys(&self) -> &ChannelPublicKeys {
1419 &self.channel_transaction_parameters.counterparty_parameters.as_ref().unwrap().pubkeys
1422 /// Allowed in any state (including after shutdown)
1423 pub fn get_counterparty_node_id(&self) -> PublicKey {
1424 self.counterparty_node_id
1427 /// Allowed in any state (including after shutdown)
1428 pub fn get_holder_htlc_minimum_msat(&self) -> u64 {
1429 self.holder_htlc_minimum_msat
1432 /// Allowed in any state (including after shutdown), but will return none before TheirInitSent
1433 pub fn get_holder_htlc_maximum_msat(&self) -> Option<u64> {
1434 self.get_htlc_maximum_msat(self.holder_max_htlc_value_in_flight_msat)
1437 /// Allowed in any state (including after shutdown)
1438 pub fn get_announced_htlc_max_msat(&self) -> u64 {
1440 // Upper bound by capacity. We make it a bit less than full capacity to prevent attempts
1441 // to use full capacity. This is an effort to reduce routing failures, because in many cases
1442 // channel might have been used to route very small values (either by honest users or as DoS).
1443 self.channel_value_satoshis * 1000 * 9 / 10,
1445 self.counterparty_max_htlc_value_in_flight_msat
1449 /// Allowed in any state (including after shutdown)
1450 pub fn get_counterparty_htlc_minimum_msat(&self) -> u64 {
1451 self.counterparty_htlc_minimum_msat
1454 /// Allowed in any state (including after shutdown), but will return none before TheirInitSent
1455 pub fn get_counterparty_htlc_maximum_msat(&self) -> Option<u64> {
1456 self.get_htlc_maximum_msat(self.counterparty_max_htlc_value_in_flight_msat)
1459 fn get_htlc_maximum_msat(&self, party_max_htlc_value_in_flight_msat: u64) -> Option<u64> {
1460 self.counterparty_selected_channel_reserve_satoshis.map(|counterparty_reserve| {
1461 let holder_reserve = self.holder_selected_channel_reserve_satoshis;
1463 (self.channel_value_satoshis - counterparty_reserve - holder_reserve) * 1000,
1464 party_max_htlc_value_in_flight_msat
1469 pub fn get_value_satoshis(&self) -> u64 {
1470 self.channel_value_satoshis
1473 pub fn get_fee_proportional_millionths(&self) -> u32 {
1474 self.config.options.forwarding_fee_proportional_millionths
1477 pub fn get_cltv_expiry_delta(&self) -> u16 {
1478 cmp::max(self.config.options.cltv_expiry_delta, MIN_CLTV_EXPIRY_DELTA)
1481 pub fn get_max_dust_htlc_exposure_msat<F: Deref>(&self,
1482 fee_estimator: &LowerBoundedFeeEstimator<F>) -> u64
1483 where F::Target: FeeEstimator
1485 match self.config.options.max_dust_htlc_exposure {
1486 MaxDustHTLCExposure::FeeRateMultiplier(multiplier) => {
1487 let feerate_per_kw = fee_estimator.bounded_sat_per_1000_weight(
1488 ConfirmationTarget::OnChainSweep) as u64;
1489 feerate_per_kw.saturating_mul(multiplier)
1491 MaxDustHTLCExposure::FixedLimitMsat(limit) => limit,
1495 /// Returns the previous [`ChannelConfig`] applied to this channel, if any.
1496 pub fn prev_config(&self) -> Option<ChannelConfig> {
1497 self.prev_config.map(|prev_config| prev_config.0)
1500 // Checks whether we should emit a `ChannelPending` event.
1501 pub(crate) fn should_emit_channel_pending_event(&mut self) -> bool {
1502 self.is_funding_broadcast() && !self.channel_pending_event_emitted
1505 // Returns whether we already emitted a `ChannelPending` event.
1506 pub(crate) fn channel_pending_event_emitted(&self) -> bool {
1507 self.channel_pending_event_emitted
1510 // Remembers that we already emitted a `ChannelPending` event.
1511 pub(crate) fn set_channel_pending_event_emitted(&mut self) {
1512 self.channel_pending_event_emitted = true;
1515 // Checks whether we should emit a `ChannelReady` event.
1516 pub(crate) fn should_emit_channel_ready_event(&mut self) -> bool {
1517 self.is_usable() && !self.channel_ready_event_emitted
1520 // Remembers that we already emitted a `ChannelReady` event.
1521 pub(crate) fn set_channel_ready_event_emitted(&mut self) {
1522 self.channel_ready_event_emitted = true;
1525 /// Tracks the number of ticks elapsed since the previous [`ChannelConfig`] was updated. Once
1526 /// [`EXPIRE_PREV_CONFIG_TICKS`] is reached, the previous config is considered expired and will
1527 /// no longer be considered when forwarding HTLCs.
1528 pub fn maybe_expire_prev_config(&mut self) {
1529 if self.prev_config.is_none() {
1532 let prev_config = self.prev_config.as_mut().unwrap();
1534 if prev_config.1 == EXPIRE_PREV_CONFIG_TICKS {
1535 self.prev_config = None;
1539 /// Returns the current [`ChannelConfig`] applied to the channel.
1540 pub fn config(&self) -> ChannelConfig {
1544 /// Updates the channel's config. A bool is returned indicating whether the config update
1545 /// applied resulted in a new ChannelUpdate message.
1546 pub fn update_config(&mut self, config: &ChannelConfig) -> bool {
1547 let did_channel_update =
1548 self.config.options.forwarding_fee_proportional_millionths != config.forwarding_fee_proportional_millionths ||
1549 self.config.options.forwarding_fee_base_msat != config.forwarding_fee_base_msat ||
1550 self.config.options.cltv_expiry_delta != config.cltv_expiry_delta;
1551 if did_channel_update {
1552 self.prev_config = Some((self.config.options, 0));
1553 // Update the counter, which backs the ChannelUpdate timestamp, to allow the relay
1554 // policy change to propagate throughout the network.
1555 self.update_time_counter += 1;
1557 self.config.options = *config;
1561 /// Returns true if funding_signed was sent/received and the
1562 /// funding transaction has been broadcast if necessary.
1563 pub fn is_funding_broadcast(&self) -> bool {
1564 !self.channel_state.is_pre_funded_state() &&
1565 !matches!(self.channel_state, ChannelState::AwaitingChannelReady(flags) if flags.is_set(AwaitingChannelReadyFlags::WAITING_FOR_BATCH))
1568 /// Transaction nomenclature is somewhat confusing here as there are many different cases - a
1569 /// transaction is referred to as "a's transaction" implying that a will be able to broadcast
1570 /// the transaction. Thus, b will generally be sending a signature over such a transaction to
1571 /// a, and a can revoke the transaction by providing b the relevant per_commitment_secret. As
1572 /// such, a transaction is generally the result of b increasing the amount paid to a (or adding
1574 /// @local is used only to convert relevant internal structures which refer to remote vs local
1575 /// to decide value of outputs and direction of HTLCs.
1576 /// @generated_by_local is used to determine *which* HTLCs to include - noting that the HTLC
1577 /// state may indicate that one peer has informed the other that they'd like to add an HTLC but
1578 /// have not yet committed it. Such HTLCs will only be included in transactions which are being
1579 /// generated by the peer which proposed adding the HTLCs, and thus we need to understand both
1580 /// which peer generated this transaction and "to whom" this transaction flows.
1582 fn build_commitment_transaction<L: Deref>(&self, commitment_number: u64, keys: &TxCreationKeys, local: bool, generated_by_local: bool, logger: &L) -> CommitmentStats
1583 where L::Target: Logger
1585 let mut included_dust_htlcs: Vec<(HTLCOutputInCommitment, Option<&HTLCSource>)> = Vec::new();
1586 let num_htlcs = self.pending_inbound_htlcs.len() + self.pending_outbound_htlcs.len();
1587 let mut included_non_dust_htlcs: Vec<(HTLCOutputInCommitment, Option<&HTLCSource>)> = Vec::with_capacity(num_htlcs);
1589 let broadcaster_dust_limit_satoshis = if local { self.holder_dust_limit_satoshis } else { self.counterparty_dust_limit_satoshis };
1590 let mut remote_htlc_total_msat = 0;
1591 let mut local_htlc_total_msat = 0;
1592 let mut value_to_self_msat_offset = 0;
1594 let mut feerate_per_kw = self.feerate_per_kw;
1595 if let Some((feerate, update_state)) = self.pending_update_fee {
1596 if match update_state {
1597 // Note that these match the inclusion criteria when scanning
1598 // pending_inbound_htlcs below.
1599 FeeUpdateState::RemoteAnnounced => { debug_assert!(!self.is_outbound()); !generated_by_local },
1600 FeeUpdateState::AwaitingRemoteRevokeToAnnounce => { debug_assert!(!self.is_outbound()); !generated_by_local },
1601 FeeUpdateState::Outbound => { assert!(self.is_outbound()); generated_by_local },
1603 feerate_per_kw = feerate;
1607 log_trace!(logger, "Building commitment transaction number {} (really {} xor {}) for channel {} for {}, generated by {} with fee {}...",
1608 commitment_number, (INITIAL_COMMITMENT_NUMBER - commitment_number),
1609 get_commitment_transaction_number_obscure_factor(&self.get_holder_pubkeys().payment_point, &self.get_counterparty_pubkeys().payment_point, self.is_outbound()),
1611 if local { "us" } else { "remote" }, if generated_by_local { "us" } else { "remote" }, feerate_per_kw);
1613 macro_rules! get_htlc_in_commitment {
1614 ($htlc: expr, $offered: expr) => {
1615 HTLCOutputInCommitment {
1617 amount_msat: $htlc.amount_msat,
1618 cltv_expiry: $htlc.cltv_expiry,
1619 payment_hash: $htlc.payment_hash,
1620 transaction_output_index: None
1625 macro_rules! add_htlc_output {
1626 ($htlc: expr, $outbound: expr, $source: expr, $state_name: expr) => {
1627 if $outbound == local { // "offered HTLC output"
1628 let htlc_in_tx = get_htlc_in_commitment!($htlc, true);
1629 let htlc_tx_fee = if self.get_channel_type().supports_anchors_zero_fee_htlc_tx() {
1632 feerate_per_kw as u64 * htlc_timeout_tx_weight(self.get_channel_type()) / 1000
1634 if $htlc.amount_msat / 1000 >= broadcaster_dust_limit_satoshis + htlc_tx_fee {
1635 log_trace!(logger, " ...including {} {} HTLC {} (hash {}) with value {}", if $outbound { "outbound" } else { "inbound" }, $state_name, $htlc.htlc_id, &$htlc.payment_hash, $htlc.amount_msat);
1636 included_non_dust_htlcs.push((htlc_in_tx, $source));
1638 log_trace!(logger, " ...including {} {} dust HTLC {} (hash {}) with value {} due to dust limit", if $outbound { "outbound" } else { "inbound" }, $state_name, $htlc.htlc_id, &$htlc.payment_hash, $htlc.amount_msat);
1639 included_dust_htlcs.push((htlc_in_tx, $source));
1642 let htlc_in_tx = get_htlc_in_commitment!($htlc, false);
1643 let htlc_tx_fee = if self.get_channel_type().supports_anchors_zero_fee_htlc_tx() {
1646 feerate_per_kw as u64 * htlc_success_tx_weight(self.get_channel_type()) / 1000
1648 if $htlc.amount_msat / 1000 >= broadcaster_dust_limit_satoshis + htlc_tx_fee {
1649 log_trace!(logger, " ...including {} {} HTLC {} (hash {}) with value {}", if $outbound { "outbound" } else { "inbound" }, $state_name, $htlc.htlc_id, &$htlc.payment_hash, $htlc.amount_msat);
1650 included_non_dust_htlcs.push((htlc_in_tx, $source));
1652 log_trace!(logger, " ...including {} {} dust HTLC {} (hash {}) with value {}", if $outbound { "outbound" } else { "inbound" }, $state_name, $htlc.htlc_id, &$htlc.payment_hash, $htlc.amount_msat);
1653 included_dust_htlcs.push((htlc_in_tx, $source));
1659 let mut inbound_htlc_preimages: Vec<PaymentPreimage> = Vec::new();
1661 for ref htlc in self.pending_inbound_htlcs.iter() {
1662 let (include, state_name) = match htlc.state {
1663 InboundHTLCState::RemoteAnnounced(_) => (!generated_by_local, "RemoteAnnounced"),
1664 InboundHTLCState::AwaitingRemoteRevokeToAnnounce(_) => (!generated_by_local, "AwaitingRemoteRevokeToAnnounce"),
1665 InboundHTLCState::AwaitingAnnouncedRemoteRevoke(_) => (true, "AwaitingAnnouncedRemoteRevoke"),
1666 InboundHTLCState::Committed => (true, "Committed"),
1667 InboundHTLCState::LocalRemoved(_) => (!generated_by_local, "LocalRemoved"),
1671 add_htlc_output!(htlc, false, None, state_name);
1672 remote_htlc_total_msat += htlc.amount_msat;
1674 log_trace!(logger, " ...not including inbound HTLC {} (hash {}) with value {} due to state ({})", htlc.htlc_id, &htlc.payment_hash, htlc.amount_msat, state_name);
1676 &InboundHTLCState::LocalRemoved(ref reason) => {
1677 if generated_by_local {
1678 if let &InboundHTLCRemovalReason::Fulfill(preimage) = reason {
1679 inbound_htlc_preimages.push(preimage);
1680 value_to_self_msat_offset += htlc.amount_msat as i64;
1690 let mut outbound_htlc_preimages: Vec<PaymentPreimage> = Vec::new();
1692 for ref htlc in self.pending_outbound_htlcs.iter() {
1693 let (include, state_name) = match htlc.state {
1694 OutboundHTLCState::LocalAnnounced(_) => (generated_by_local, "LocalAnnounced"),
1695 OutboundHTLCState::Committed => (true, "Committed"),
1696 OutboundHTLCState::RemoteRemoved(_) => (generated_by_local, "RemoteRemoved"),
1697 OutboundHTLCState::AwaitingRemoteRevokeToRemove(_) => (generated_by_local, "AwaitingRemoteRevokeToRemove"),
1698 OutboundHTLCState::AwaitingRemovedRemoteRevoke(_) => (false, "AwaitingRemovedRemoteRevoke"),
1701 let preimage_opt = match htlc.state {
1702 OutboundHTLCState::RemoteRemoved(OutboundHTLCOutcome::Success(p)) => p,
1703 OutboundHTLCState::AwaitingRemoteRevokeToRemove(OutboundHTLCOutcome::Success(p)) => p,
1704 OutboundHTLCState::AwaitingRemovedRemoteRevoke(OutboundHTLCOutcome::Success(p)) => p,
1708 if let Some(preimage) = preimage_opt {
1709 outbound_htlc_preimages.push(preimage);
1713 add_htlc_output!(htlc, true, Some(&htlc.source), state_name);
1714 local_htlc_total_msat += htlc.amount_msat;
1716 log_trace!(logger, " ...not including outbound HTLC {} (hash {}) with value {} due to state ({})", htlc.htlc_id, &htlc.payment_hash, htlc.amount_msat, state_name);
1718 OutboundHTLCState::AwaitingRemoteRevokeToRemove(OutboundHTLCOutcome::Success(_))|OutboundHTLCState::AwaitingRemovedRemoteRevoke(OutboundHTLCOutcome::Success(_)) => {
1719 value_to_self_msat_offset -= htlc.amount_msat as i64;
1721 OutboundHTLCState::RemoteRemoved(OutboundHTLCOutcome::Success(_)) => {
1722 if !generated_by_local {
1723 value_to_self_msat_offset -= htlc.amount_msat as i64;
1731 let mut value_to_self_msat: i64 = (self.value_to_self_msat - local_htlc_total_msat) as i64 + value_to_self_msat_offset;
1732 assert!(value_to_self_msat >= 0);
1733 // Note that in case they have several just-awaiting-last-RAA fulfills in-progress (ie
1734 // AwaitingRemoteRevokeToRemove or AwaitingRemovedRemoteRevoke) we may have allowed them to
1735 // "violate" their reserve value by couting those against it. Thus, we have to convert
1736 // everything to i64 before subtracting as otherwise we can overflow.
1737 let mut value_to_remote_msat: i64 = (self.channel_value_satoshis * 1000) as i64 - (self.value_to_self_msat as i64) - (remote_htlc_total_msat as i64) - value_to_self_msat_offset;
1738 assert!(value_to_remote_msat >= 0);
1740 #[cfg(debug_assertions)]
1742 // Make sure that the to_self/to_remote is always either past the appropriate
1743 // channel_reserve *or* it is making progress towards it.
1744 let mut broadcaster_max_commitment_tx_output = if generated_by_local {
1745 self.holder_max_commitment_tx_output.lock().unwrap()
1747 self.counterparty_max_commitment_tx_output.lock().unwrap()
1749 debug_assert!(broadcaster_max_commitment_tx_output.0 <= value_to_self_msat as u64 || value_to_self_msat / 1000 >= self.counterparty_selected_channel_reserve_satoshis.unwrap() as i64);
1750 broadcaster_max_commitment_tx_output.0 = cmp::max(broadcaster_max_commitment_tx_output.0, value_to_self_msat as u64);
1751 debug_assert!(broadcaster_max_commitment_tx_output.1 <= value_to_remote_msat as u64 || value_to_remote_msat / 1000 >= self.holder_selected_channel_reserve_satoshis as i64);
1752 broadcaster_max_commitment_tx_output.1 = cmp::max(broadcaster_max_commitment_tx_output.1, value_to_remote_msat as u64);
1755 let total_fee_sat = commit_tx_fee_sat(feerate_per_kw, included_non_dust_htlcs.len(), &self.channel_transaction_parameters.channel_type_features);
1756 let anchors_val = if self.channel_transaction_parameters.channel_type_features.supports_anchors_zero_fee_htlc_tx() { ANCHOR_OUTPUT_VALUE_SATOSHI * 2 } else { 0 } as i64;
1757 let (value_to_self, value_to_remote) = if self.is_outbound() {
1758 (value_to_self_msat / 1000 - anchors_val - total_fee_sat as i64, value_to_remote_msat / 1000)
1760 (value_to_self_msat / 1000, value_to_remote_msat / 1000 - anchors_val - total_fee_sat as i64)
1763 let mut value_to_a = if local { value_to_self } else { value_to_remote };
1764 let mut value_to_b = if local { value_to_remote } else { value_to_self };
1765 let (funding_pubkey_a, funding_pubkey_b) = if local {
1766 (self.get_holder_pubkeys().funding_pubkey, self.get_counterparty_pubkeys().funding_pubkey)
1768 (self.get_counterparty_pubkeys().funding_pubkey, self.get_holder_pubkeys().funding_pubkey)
1771 if value_to_a >= (broadcaster_dust_limit_satoshis as i64) {
1772 log_trace!(logger, " ...including {} output with value {}", if local { "to_local" } else { "to_remote" }, value_to_a);
1777 if value_to_b >= (broadcaster_dust_limit_satoshis as i64) {
1778 log_trace!(logger, " ...including {} output with value {}", if local { "to_remote" } else { "to_local" }, value_to_b);
1783 let num_nondust_htlcs = included_non_dust_htlcs.len();
1785 let channel_parameters =
1786 if local { self.channel_transaction_parameters.as_holder_broadcastable() }
1787 else { self.channel_transaction_parameters.as_counterparty_broadcastable() };
1788 let tx = CommitmentTransaction::new_with_auxiliary_htlc_data(commitment_number,
1795 &mut included_non_dust_htlcs,
1798 let mut htlcs_included = included_non_dust_htlcs;
1799 // The unwrap is safe, because all non-dust HTLCs have been assigned an output index
1800 htlcs_included.sort_unstable_by_key(|h| h.0.transaction_output_index.unwrap());
1801 htlcs_included.append(&mut included_dust_htlcs);
1803 // For the stats, trimmed-to-0 the value in msats accordingly
1804 value_to_self_msat = if (value_to_self_msat * 1000) < broadcaster_dust_limit_satoshis as i64 { 0 } else { value_to_self_msat };
1805 value_to_remote_msat = if (value_to_remote_msat * 1000) < broadcaster_dust_limit_satoshis as i64 { 0 } else { value_to_remote_msat };
1813 local_balance_msat: value_to_self_msat as u64,
1814 remote_balance_msat: value_to_remote_msat as u64,
1815 inbound_htlc_preimages,
1816 outbound_htlc_preimages,
1821 /// Creates a set of keys for build_commitment_transaction to generate a transaction which our
1822 /// counterparty will sign (ie DO NOT send signatures over a transaction created by this to
1823 /// our counterparty!)
1824 /// The result is a transaction which we can revoke broadcastership of (ie a "local" transaction)
1825 /// TODO Some magic rust shit to compile-time check this?
1826 fn build_holder_transaction_keys(&self, commitment_number: u64) -> TxCreationKeys {
1827 let per_commitment_point = self.holder_signer.as_ref().get_per_commitment_point(commitment_number, &self.secp_ctx);
1828 let delayed_payment_base = &self.get_holder_pubkeys().delayed_payment_basepoint;
1829 let htlc_basepoint = &self.get_holder_pubkeys().htlc_basepoint;
1830 let counterparty_pubkeys = self.get_counterparty_pubkeys();
1832 TxCreationKeys::derive_new(&self.secp_ctx, &per_commitment_point, delayed_payment_base, htlc_basepoint, &counterparty_pubkeys.revocation_basepoint, &counterparty_pubkeys.htlc_basepoint)
1836 /// Creates a set of keys for build_commitment_transaction to generate a transaction which we
1837 /// will sign and send to our counterparty.
1838 /// If an Err is returned, it is a ChannelError::Close (for get_funding_created)
1839 fn build_remote_transaction_keys(&self) -> TxCreationKeys {
1840 //TODO: Ensure that the payment_key derived here ends up in the library users' wallet as we
1841 //may see payments to it!
1842 let revocation_basepoint = &self.get_holder_pubkeys().revocation_basepoint;
1843 let htlc_basepoint = &self.get_holder_pubkeys().htlc_basepoint;
1844 let counterparty_pubkeys = self.get_counterparty_pubkeys();
1846 TxCreationKeys::derive_new(&self.secp_ctx, &self.counterparty_cur_commitment_point.unwrap(), &counterparty_pubkeys.delayed_payment_basepoint, &counterparty_pubkeys.htlc_basepoint, revocation_basepoint, htlc_basepoint)
1849 /// Gets the redeemscript for the funding transaction output (ie the funding transaction output
1850 /// pays to get_funding_redeemscript().to_v0_p2wsh()).
1851 /// Panics if called before accept_channel/InboundV1Channel::new
1852 pub fn get_funding_redeemscript(&self) -> ScriptBuf {
1853 make_funding_redeemscript(&self.get_holder_pubkeys().funding_pubkey, self.counterparty_funding_pubkey())
1856 fn counterparty_funding_pubkey(&self) -> &PublicKey {
1857 &self.get_counterparty_pubkeys().funding_pubkey
1860 pub fn get_feerate_sat_per_1000_weight(&self) -> u32 {
1864 pub fn get_dust_buffer_feerate(&self, outbound_feerate_update: Option<u32>) -> u32 {
1865 // When calculating our exposure to dust HTLCs, we assume that the channel feerate
1866 // may, at any point, increase by at least 10 sat/vB (i.e 2530 sat/kWU) or 25%,
1867 // whichever is higher. This ensures that we aren't suddenly exposed to significantly
1868 // more dust balance if the feerate increases when we have several HTLCs pending
1869 // which are near the dust limit.
1870 let mut feerate_per_kw = self.feerate_per_kw;
1871 // If there's a pending update fee, use it to ensure we aren't under-estimating
1872 // potential feerate updates coming soon.
1873 if let Some((feerate, _)) = self.pending_update_fee {
1874 feerate_per_kw = cmp::max(feerate_per_kw, feerate);
1876 if let Some(feerate) = outbound_feerate_update {
1877 feerate_per_kw = cmp::max(feerate_per_kw, feerate);
1879 cmp::max(2530, feerate_per_kw * 1250 / 1000)
1882 /// Get forwarding information for the counterparty.
1883 pub fn counterparty_forwarding_info(&self) -> Option<CounterpartyForwardingInfo> {
1884 self.counterparty_forwarding_info.clone()
1887 /// Returns a HTLCStats about inbound pending htlcs
1888 fn get_inbound_pending_htlc_stats(&self, outbound_feerate_update: Option<u32>) -> HTLCStats {
1890 let mut stats = HTLCStats {
1891 pending_htlcs: context.pending_inbound_htlcs.len() as u32,
1892 pending_htlcs_value_msat: 0,
1893 on_counterparty_tx_dust_exposure_msat: 0,
1894 on_holder_tx_dust_exposure_msat: 0,
1895 holding_cell_msat: 0,
1896 on_holder_tx_holding_cell_htlcs_count: 0,
1899 let (htlc_timeout_dust_limit, htlc_success_dust_limit) = if context.get_channel_type().supports_anchors_zero_fee_htlc_tx() {
1902 let dust_buffer_feerate = context.get_dust_buffer_feerate(outbound_feerate_update) as u64;
1903 (dust_buffer_feerate * htlc_timeout_tx_weight(context.get_channel_type()) / 1000,
1904 dust_buffer_feerate * htlc_success_tx_weight(context.get_channel_type()) / 1000)
1906 let counterparty_dust_limit_timeout_sat = htlc_timeout_dust_limit + context.counterparty_dust_limit_satoshis;
1907 let holder_dust_limit_success_sat = htlc_success_dust_limit + context.holder_dust_limit_satoshis;
1908 for ref htlc in context.pending_inbound_htlcs.iter() {
1909 stats.pending_htlcs_value_msat += htlc.amount_msat;
1910 if htlc.amount_msat / 1000 < counterparty_dust_limit_timeout_sat {
1911 stats.on_counterparty_tx_dust_exposure_msat += htlc.amount_msat;
1913 if htlc.amount_msat / 1000 < holder_dust_limit_success_sat {
1914 stats.on_holder_tx_dust_exposure_msat += htlc.amount_msat;
1920 /// Returns a HTLCStats about pending outbound htlcs, *including* pending adds in our holding cell.
1921 fn get_outbound_pending_htlc_stats(&self, outbound_feerate_update: Option<u32>) -> HTLCStats {
1923 let mut stats = HTLCStats {
1924 pending_htlcs: context.pending_outbound_htlcs.len() as u32,
1925 pending_htlcs_value_msat: 0,
1926 on_counterparty_tx_dust_exposure_msat: 0,
1927 on_holder_tx_dust_exposure_msat: 0,
1928 holding_cell_msat: 0,
1929 on_holder_tx_holding_cell_htlcs_count: 0,
1932 let (htlc_timeout_dust_limit, htlc_success_dust_limit) = if context.get_channel_type().supports_anchors_zero_fee_htlc_tx() {
1935 let dust_buffer_feerate = context.get_dust_buffer_feerate(outbound_feerate_update) as u64;
1936 (dust_buffer_feerate * htlc_timeout_tx_weight(context.get_channel_type()) / 1000,
1937 dust_buffer_feerate * htlc_success_tx_weight(context.get_channel_type()) / 1000)
1939 let counterparty_dust_limit_success_sat = htlc_success_dust_limit + context.counterparty_dust_limit_satoshis;
1940 let holder_dust_limit_timeout_sat = htlc_timeout_dust_limit + context.holder_dust_limit_satoshis;
1941 for ref htlc in context.pending_outbound_htlcs.iter() {
1942 stats.pending_htlcs_value_msat += htlc.amount_msat;
1943 if htlc.amount_msat / 1000 < counterparty_dust_limit_success_sat {
1944 stats.on_counterparty_tx_dust_exposure_msat += htlc.amount_msat;
1946 if htlc.amount_msat / 1000 < holder_dust_limit_timeout_sat {
1947 stats.on_holder_tx_dust_exposure_msat += htlc.amount_msat;
1951 for update in context.holding_cell_htlc_updates.iter() {
1952 if let &HTLCUpdateAwaitingACK::AddHTLC { ref amount_msat, .. } = update {
1953 stats.pending_htlcs += 1;
1954 stats.pending_htlcs_value_msat += amount_msat;
1955 stats.holding_cell_msat += amount_msat;
1956 if *amount_msat / 1000 < counterparty_dust_limit_success_sat {
1957 stats.on_counterparty_tx_dust_exposure_msat += amount_msat;
1959 if *amount_msat / 1000 < holder_dust_limit_timeout_sat {
1960 stats.on_holder_tx_dust_exposure_msat += amount_msat;
1962 stats.on_holder_tx_holding_cell_htlcs_count += 1;
1969 /// Get the available balances, see [`AvailableBalances`]'s fields for more info.
1970 /// Doesn't bother handling the
1971 /// if-we-removed-it-already-but-haven't-fully-resolved-they-can-still-send-an-inbound-HTLC
1972 /// corner case properly.
1973 pub fn get_available_balances<F: Deref>(&self, fee_estimator: &LowerBoundedFeeEstimator<F>)
1974 -> AvailableBalances
1975 where F::Target: FeeEstimator
1977 let context = &self;
1978 // Note that we have to handle overflow due to the above case.
1979 let inbound_stats = context.get_inbound_pending_htlc_stats(None);
1980 let outbound_stats = context.get_outbound_pending_htlc_stats(None);
1982 let mut balance_msat = context.value_to_self_msat;
1983 for ref htlc in context.pending_inbound_htlcs.iter() {
1984 if let InboundHTLCState::LocalRemoved(InboundHTLCRemovalReason::Fulfill(_)) = htlc.state {
1985 balance_msat += htlc.amount_msat;
1988 balance_msat -= outbound_stats.pending_htlcs_value_msat;
1990 let outbound_capacity_msat = context.value_to_self_msat
1991 .saturating_sub(outbound_stats.pending_htlcs_value_msat)
1993 context.counterparty_selected_channel_reserve_satoshis.unwrap_or(0) * 1000);
1995 let mut available_capacity_msat = outbound_capacity_msat;
1997 let anchor_outputs_value_msat = if context.get_channel_type().supports_anchors_zero_fee_htlc_tx() {
1998 ANCHOR_OUTPUT_VALUE_SATOSHI * 2 * 1000
2002 if context.is_outbound() {
2003 // We should mind channel commit tx fee when computing how much of the available capacity
2004 // can be used in the next htlc. Mirrors the logic in send_htlc.
2006 // The fee depends on whether the amount we will be sending is above dust or not,
2007 // and the answer will in turn change the amount itself — making it a circular
2009 // This complicates the computation around dust-values, up to the one-htlc-value.
2010 let mut real_dust_limit_timeout_sat = context.holder_dust_limit_satoshis;
2011 if !context.get_channel_type().supports_anchors_zero_fee_htlc_tx() {
2012 real_dust_limit_timeout_sat += context.feerate_per_kw as u64 * htlc_timeout_tx_weight(context.get_channel_type()) / 1000;
2015 let htlc_above_dust = HTLCCandidate::new(real_dust_limit_timeout_sat * 1000, HTLCInitiator::LocalOffered);
2016 let mut max_reserved_commit_tx_fee_msat = context.next_local_commit_tx_fee_msat(htlc_above_dust, Some(()));
2017 let htlc_dust = HTLCCandidate::new(real_dust_limit_timeout_sat * 1000 - 1, HTLCInitiator::LocalOffered);
2018 let mut min_reserved_commit_tx_fee_msat = context.next_local_commit_tx_fee_msat(htlc_dust, Some(()));
2019 if !context.get_channel_type().supports_anchors_zero_fee_htlc_tx() {
2020 max_reserved_commit_tx_fee_msat *= FEE_SPIKE_BUFFER_FEE_INCREASE_MULTIPLE;
2021 min_reserved_commit_tx_fee_msat *= FEE_SPIKE_BUFFER_FEE_INCREASE_MULTIPLE;
2024 // We will first subtract the fee as if we were above-dust. Then, if the resulting
2025 // value ends up being below dust, we have this fee available again. In that case,
2026 // match the value to right-below-dust.
2027 let mut capacity_minus_commitment_fee_msat: i64 = available_capacity_msat as i64 -
2028 max_reserved_commit_tx_fee_msat as i64 - anchor_outputs_value_msat as i64;
2029 if capacity_minus_commitment_fee_msat < (real_dust_limit_timeout_sat as i64) * 1000 {
2030 let one_htlc_difference_msat = max_reserved_commit_tx_fee_msat - min_reserved_commit_tx_fee_msat;
2031 debug_assert!(one_htlc_difference_msat != 0);
2032 capacity_minus_commitment_fee_msat += one_htlc_difference_msat as i64;
2033 capacity_minus_commitment_fee_msat = cmp::min(real_dust_limit_timeout_sat as i64 * 1000 - 1, capacity_minus_commitment_fee_msat);
2034 available_capacity_msat = cmp::max(0, cmp::min(capacity_minus_commitment_fee_msat, available_capacity_msat as i64)) as u64;
2036 available_capacity_msat = capacity_minus_commitment_fee_msat as u64;
2039 // If the channel is inbound (i.e. counterparty pays the fee), we need to make sure
2040 // sending a new HTLC won't reduce their balance below our reserve threshold.
2041 let mut real_dust_limit_success_sat = context.counterparty_dust_limit_satoshis;
2042 if !context.get_channel_type().supports_anchors_zero_fee_htlc_tx() {
2043 real_dust_limit_success_sat += context.feerate_per_kw as u64 * htlc_success_tx_weight(context.get_channel_type()) / 1000;
2046 let htlc_above_dust = HTLCCandidate::new(real_dust_limit_success_sat * 1000, HTLCInitiator::LocalOffered);
2047 let max_reserved_commit_tx_fee_msat = context.next_remote_commit_tx_fee_msat(htlc_above_dust, None);
2049 let holder_selected_chan_reserve_msat = context.holder_selected_channel_reserve_satoshis * 1000;
2050 let remote_balance_msat = (context.channel_value_satoshis * 1000 - context.value_to_self_msat)
2051 .saturating_sub(inbound_stats.pending_htlcs_value_msat);
2053 if remote_balance_msat < max_reserved_commit_tx_fee_msat + holder_selected_chan_reserve_msat + anchor_outputs_value_msat {
2054 // If another HTLC's fee would reduce the remote's balance below the reserve limit
2055 // we've selected for them, we can only send dust HTLCs.
2056 available_capacity_msat = cmp::min(available_capacity_msat, real_dust_limit_success_sat * 1000 - 1);
2060 let mut next_outbound_htlc_minimum_msat = context.counterparty_htlc_minimum_msat;
2062 // If we get close to our maximum dust exposure, we end up in a situation where we can send
2063 // between zero and the remaining dust exposure limit remaining OR above the dust limit.
2064 // Because we cannot express this as a simple min/max, we prefer to tell the user they can
2065 // send above the dust limit (as the router can always overpay to meet the dust limit).
2066 let mut remaining_msat_below_dust_exposure_limit = None;
2067 let mut dust_exposure_dust_limit_msat = 0;
2068 let max_dust_htlc_exposure_msat = context.get_max_dust_htlc_exposure_msat(fee_estimator);
2070 let (htlc_success_dust_limit, htlc_timeout_dust_limit) = if context.get_channel_type().supports_anchors_zero_fee_htlc_tx() {
2071 (context.counterparty_dust_limit_satoshis, context.holder_dust_limit_satoshis)
2073 let dust_buffer_feerate = context.get_dust_buffer_feerate(None) as u64;
2074 (context.counterparty_dust_limit_satoshis + dust_buffer_feerate * htlc_success_tx_weight(context.get_channel_type()) / 1000,
2075 context.holder_dust_limit_satoshis + dust_buffer_feerate * htlc_timeout_tx_weight(context.get_channel_type()) / 1000)
2077 let on_counterparty_dust_htlc_exposure_msat = inbound_stats.on_counterparty_tx_dust_exposure_msat + outbound_stats.on_counterparty_tx_dust_exposure_msat;
2078 if on_counterparty_dust_htlc_exposure_msat as i64 + htlc_success_dust_limit as i64 * 1000 - 1 > max_dust_htlc_exposure_msat.try_into().unwrap_or(i64::max_value()) {
2079 remaining_msat_below_dust_exposure_limit =
2080 Some(max_dust_htlc_exposure_msat.saturating_sub(on_counterparty_dust_htlc_exposure_msat));
2081 dust_exposure_dust_limit_msat = cmp::max(dust_exposure_dust_limit_msat, htlc_success_dust_limit * 1000);
2084 let on_holder_dust_htlc_exposure_msat = inbound_stats.on_holder_tx_dust_exposure_msat + outbound_stats.on_holder_tx_dust_exposure_msat;
2085 if on_holder_dust_htlc_exposure_msat as i64 + htlc_timeout_dust_limit as i64 * 1000 - 1 > max_dust_htlc_exposure_msat.try_into().unwrap_or(i64::max_value()) {
2086 remaining_msat_below_dust_exposure_limit = Some(cmp::min(
2087 remaining_msat_below_dust_exposure_limit.unwrap_or(u64::max_value()),
2088 max_dust_htlc_exposure_msat.saturating_sub(on_holder_dust_htlc_exposure_msat)));
2089 dust_exposure_dust_limit_msat = cmp::max(dust_exposure_dust_limit_msat, htlc_timeout_dust_limit * 1000);
2092 if let Some(remaining_limit_msat) = remaining_msat_below_dust_exposure_limit {
2093 if available_capacity_msat < dust_exposure_dust_limit_msat {
2094 available_capacity_msat = cmp::min(available_capacity_msat, remaining_limit_msat);
2096 next_outbound_htlc_minimum_msat = cmp::max(next_outbound_htlc_minimum_msat, dust_exposure_dust_limit_msat);
2100 available_capacity_msat = cmp::min(available_capacity_msat,
2101 context.counterparty_max_htlc_value_in_flight_msat - outbound_stats.pending_htlcs_value_msat);
2103 if outbound_stats.pending_htlcs + 1 > context.counterparty_max_accepted_htlcs as u32 {
2104 available_capacity_msat = 0;
2108 inbound_capacity_msat: cmp::max(context.channel_value_satoshis as i64 * 1000
2109 - context.value_to_self_msat as i64
2110 - context.get_inbound_pending_htlc_stats(None).pending_htlcs_value_msat as i64
2111 - context.holder_selected_channel_reserve_satoshis as i64 * 1000,
2113 outbound_capacity_msat,
2114 next_outbound_htlc_limit_msat: available_capacity_msat,
2115 next_outbound_htlc_minimum_msat,
2120 pub fn get_holder_counterparty_selected_channel_reserve_satoshis(&self) -> (u64, Option<u64>) {
2121 let context = &self;
2122 (context.holder_selected_channel_reserve_satoshis, context.counterparty_selected_channel_reserve_satoshis)
2125 /// Get the commitment tx fee for the local's (i.e. our) next commitment transaction based on the
2126 /// number of pending HTLCs that are on track to be in our next commitment tx.
2128 /// Optionally includes the `HTLCCandidate` given by `htlc` and an additional non-dust HTLC if
2129 /// `fee_spike_buffer_htlc` is `Some`.
2131 /// The first extra HTLC is useful for determining whether we can accept a further HTLC, the
2132 /// second allows for creating a buffer to ensure a further HTLC can always be accepted/added.
2134 /// Dust HTLCs are excluded.
2135 fn next_local_commit_tx_fee_msat(&self, htlc: HTLCCandidate, fee_spike_buffer_htlc: Option<()>) -> u64 {
2136 let context = &self;
2137 assert!(context.is_outbound());
2139 let (htlc_success_dust_limit, htlc_timeout_dust_limit) = if context.get_channel_type().supports_anchors_zero_fee_htlc_tx() {
2142 (context.feerate_per_kw as u64 * htlc_success_tx_weight(context.get_channel_type()) / 1000,
2143 context.feerate_per_kw as u64 * htlc_timeout_tx_weight(context.get_channel_type()) / 1000)
2145 let real_dust_limit_success_sat = htlc_success_dust_limit + context.holder_dust_limit_satoshis;
2146 let real_dust_limit_timeout_sat = htlc_timeout_dust_limit + context.holder_dust_limit_satoshis;
2148 let mut addl_htlcs = 0;
2149 if fee_spike_buffer_htlc.is_some() { addl_htlcs += 1; }
2151 HTLCInitiator::LocalOffered => {
2152 if htlc.amount_msat / 1000 >= real_dust_limit_timeout_sat {
2156 HTLCInitiator::RemoteOffered => {
2157 if htlc.amount_msat / 1000 >= real_dust_limit_success_sat {
2163 let mut included_htlcs = 0;
2164 for ref htlc in context.pending_inbound_htlcs.iter() {
2165 if htlc.amount_msat / 1000 < real_dust_limit_success_sat {
2168 // We include LocalRemoved HTLCs here because we may still need to broadcast a commitment
2169 // transaction including this HTLC if it times out before they RAA.
2170 included_htlcs += 1;
2173 for ref htlc in context.pending_outbound_htlcs.iter() {
2174 if htlc.amount_msat / 1000 < real_dust_limit_timeout_sat {
2178 OutboundHTLCState::LocalAnnounced {..} => included_htlcs += 1,
2179 OutboundHTLCState::Committed => included_htlcs += 1,
2180 OutboundHTLCState::RemoteRemoved {..} => included_htlcs += 1,
2181 // We don't include AwaitingRemoteRevokeToRemove HTLCs because our next commitment
2182 // transaction won't be generated until they send us their next RAA, which will mean
2183 // dropping any HTLCs in this state.
2188 for htlc in context.holding_cell_htlc_updates.iter() {
2190 &HTLCUpdateAwaitingACK::AddHTLC { amount_msat, .. } => {
2191 if amount_msat / 1000 < real_dust_limit_timeout_sat {
2196 _ => {}, // Don't include claims/fails that are awaiting ack, because once we get the
2197 // ack we're guaranteed to never include them in commitment txs anymore.
2201 let num_htlcs = included_htlcs + addl_htlcs;
2202 let res = commit_tx_fee_msat(context.feerate_per_kw, num_htlcs, &context.channel_type);
2203 #[cfg(any(test, fuzzing))]
2206 if fee_spike_buffer_htlc.is_some() {
2207 fee = commit_tx_fee_msat(context.feerate_per_kw, num_htlcs - 1, &context.channel_type);
2209 let total_pending_htlcs = context.pending_inbound_htlcs.len() + context.pending_outbound_htlcs.len()
2210 + context.holding_cell_htlc_updates.len();
2211 let commitment_tx_info = CommitmentTxInfoCached {
2213 total_pending_htlcs,
2214 next_holder_htlc_id: match htlc.origin {
2215 HTLCInitiator::LocalOffered => context.next_holder_htlc_id + 1,
2216 HTLCInitiator::RemoteOffered => context.next_holder_htlc_id,
2218 next_counterparty_htlc_id: match htlc.origin {
2219 HTLCInitiator::LocalOffered => context.next_counterparty_htlc_id,
2220 HTLCInitiator::RemoteOffered => context.next_counterparty_htlc_id + 1,
2222 feerate: context.feerate_per_kw,
2224 *context.next_local_commitment_tx_fee_info_cached.lock().unwrap() = Some(commitment_tx_info);
2229 /// Get the commitment tx fee for the remote's next commitment transaction based on the number of
2230 /// pending HTLCs that are on track to be in their next commitment tx
2232 /// Optionally includes the `HTLCCandidate` given by `htlc` and an additional non-dust HTLC if
2233 /// `fee_spike_buffer_htlc` is `Some`.
2235 /// The first extra HTLC is useful for determining whether we can accept a further HTLC, the
2236 /// second allows for creating a buffer to ensure a further HTLC can always be accepted/added.
2238 /// Dust HTLCs are excluded.
2239 fn next_remote_commit_tx_fee_msat(&self, htlc: HTLCCandidate, fee_spike_buffer_htlc: Option<()>) -> u64 {
2240 let context = &self;
2241 assert!(!context.is_outbound());
2243 let (htlc_success_dust_limit, htlc_timeout_dust_limit) = if context.get_channel_type().supports_anchors_zero_fee_htlc_tx() {
2246 (context.feerate_per_kw as u64 * htlc_success_tx_weight(context.get_channel_type()) / 1000,
2247 context.feerate_per_kw as u64 * htlc_timeout_tx_weight(context.get_channel_type()) / 1000)
2249 let real_dust_limit_success_sat = htlc_success_dust_limit + context.counterparty_dust_limit_satoshis;
2250 let real_dust_limit_timeout_sat = htlc_timeout_dust_limit + context.counterparty_dust_limit_satoshis;
2252 let mut addl_htlcs = 0;
2253 if fee_spike_buffer_htlc.is_some() { addl_htlcs += 1; }
2255 HTLCInitiator::LocalOffered => {
2256 if htlc.amount_msat / 1000 >= real_dust_limit_success_sat {
2260 HTLCInitiator::RemoteOffered => {
2261 if htlc.amount_msat / 1000 >= real_dust_limit_timeout_sat {
2267 // When calculating the set of HTLCs which will be included in their next commitment_signed, all
2268 // non-dust inbound HTLCs are included (as all states imply it will be included) and only
2269 // committed outbound HTLCs, see below.
2270 let mut included_htlcs = 0;
2271 for ref htlc in context.pending_inbound_htlcs.iter() {
2272 if htlc.amount_msat / 1000 <= real_dust_limit_timeout_sat {
2275 included_htlcs += 1;
2278 for ref htlc in context.pending_outbound_htlcs.iter() {
2279 if htlc.amount_msat / 1000 <= real_dust_limit_success_sat {
2282 // We only include outbound HTLCs if it will not be included in their next commitment_signed,
2283 // i.e. if they've responded to us with an RAA after announcement.
2285 OutboundHTLCState::Committed => included_htlcs += 1,
2286 OutboundHTLCState::RemoteRemoved {..} => included_htlcs += 1,
2287 OutboundHTLCState::LocalAnnounced { .. } => included_htlcs += 1,
2292 let num_htlcs = included_htlcs + addl_htlcs;
2293 let res = commit_tx_fee_msat(context.feerate_per_kw, num_htlcs, &context.channel_type);
2294 #[cfg(any(test, fuzzing))]
2297 if fee_spike_buffer_htlc.is_some() {
2298 fee = commit_tx_fee_msat(context.feerate_per_kw, num_htlcs - 1, &context.channel_type);
2300 let total_pending_htlcs = context.pending_inbound_htlcs.len() + context.pending_outbound_htlcs.len();
2301 let commitment_tx_info = CommitmentTxInfoCached {
2303 total_pending_htlcs,
2304 next_holder_htlc_id: match htlc.origin {
2305 HTLCInitiator::LocalOffered => context.next_holder_htlc_id + 1,
2306 HTLCInitiator::RemoteOffered => context.next_holder_htlc_id,
2308 next_counterparty_htlc_id: match htlc.origin {
2309 HTLCInitiator::LocalOffered => context.next_counterparty_htlc_id,
2310 HTLCInitiator::RemoteOffered => context.next_counterparty_htlc_id + 1,
2312 feerate: context.feerate_per_kw,
2314 *context.next_remote_commitment_tx_fee_info_cached.lock().unwrap() = Some(commitment_tx_info);
2319 fn if_unbroadcasted_funding<F, O>(&self, f: F) -> Option<O>
2320 where F: Fn() -> Option<O> {
2321 match self.channel_state {
2322 ChannelState::FundingNegotiated => f(),
2323 ChannelState::AwaitingChannelReady(flags) => if flags.is_set(AwaitingChannelReadyFlags::WAITING_FOR_BATCH) {
2332 /// Returns the transaction if there is a pending funding transaction that is yet to be
2334 pub fn unbroadcasted_funding(&self) -> Option<Transaction> {
2335 self.if_unbroadcasted_funding(|| self.funding_transaction.clone())
2338 /// Returns the transaction ID if there is a pending funding transaction that is yet to be
2340 pub fn unbroadcasted_funding_txid(&self) -> Option<Txid> {
2341 self.if_unbroadcasted_funding(||
2342 self.channel_transaction_parameters.funding_outpoint.map(|txo| txo.txid)
2346 /// Returns whether the channel is funded in a batch.
2347 pub fn is_batch_funding(&self) -> bool {
2348 self.is_batch_funding.is_some()
2351 /// Returns the transaction ID if there is a pending batch funding transaction that is yet to be
2353 pub fn unbroadcasted_batch_funding_txid(&self) -> Option<Txid> {
2354 self.unbroadcasted_funding_txid().filter(|_| self.is_batch_funding())
2357 /// Gets the latest commitment transaction and any dependent transactions for relay (forcing
2358 /// shutdown of this channel - no more calls into this Channel may be made afterwards except
2359 /// those explicitly stated to be allowed after shutdown completes, eg some simple getters).
2360 /// Also returns the list of payment_hashes for channels which we can safely fail backwards
2361 /// immediately (others we will have to allow to time out).
2362 pub fn force_shutdown(&mut self, should_broadcast: bool) -> ShutdownResult {
2363 // Note that we MUST only generate a monitor update that indicates force-closure - we're
2364 // called during initialization prior to the chain_monitor in the encompassing ChannelManager
2365 // being fully configured in some cases. Thus, its likely any monitor events we generate will
2366 // be delayed in being processed! See the docs for `ChannelManagerReadArgs` for more.
2367 assert!(!matches!(self.channel_state, ChannelState::ShutdownComplete));
2369 // We go ahead and "free" any holding cell HTLCs or HTLCs we haven't yet committed to and
2370 // return them to fail the payment.
2371 let mut dropped_outbound_htlcs = Vec::with_capacity(self.holding_cell_htlc_updates.len());
2372 let counterparty_node_id = self.get_counterparty_node_id();
2373 for htlc_update in self.holding_cell_htlc_updates.drain(..) {
2375 HTLCUpdateAwaitingACK::AddHTLC { source, payment_hash, .. } => {
2376 dropped_outbound_htlcs.push((source, payment_hash, counterparty_node_id, self.channel_id));
2381 let monitor_update = if let Some(funding_txo) = self.get_funding_txo() {
2382 // If we haven't yet exchanged funding signatures (ie channel_state < AwaitingChannelReady),
2383 // returning a channel monitor update here would imply a channel monitor update before
2384 // we even registered the channel monitor to begin with, which is invalid.
2385 // Thus, if we aren't actually at a point where we could conceivably broadcast the
2386 // funding transaction, don't return a funding txo (which prevents providing the
2387 // monitor update to the user, even if we return one).
2388 // See test_duplicate_chan_id and test_pre_lockin_no_chan_closed_update for more.
2389 let generate_monitor_update = match self.channel_state {
2390 ChannelState::AwaitingChannelReady(_)|ChannelState::ChannelReady(_)|ChannelState::ShutdownComplete => true,
2393 if generate_monitor_update {
2394 self.latest_monitor_update_id = CLOSED_CHANNEL_UPDATE_ID;
2395 Some((self.get_counterparty_node_id(), funding_txo, ChannelMonitorUpdate {
2396 update_id: self.latest_monitor_update_id,
2397 updates: vec![ChannelMonitorUpdateStep::ChannelForceClosed { should_broadcast }],
2401 let unbroadcasted_batch_funding_txid = self.unbroadcasted_batch_funding_txid();
2403 self.channel_state = ChannelState::ShutdownComplete;
2404 self.update_time_counter += 1;
2407 dropped_outbound_htlcs,
2408 unbroadcasted_batch_funding_txid,
2409 channel_id: self.channel_id,
2410 counterparty_node_id: self.counterparty_node_id,
2414 /// Only allowed after [`Self::channel_transaction_parameters`] is set.
2415 fn get_funding_signed_msg<L: Deref>(&mut self, logger: &L) -> (CommitmentTransaction, Option<msgs::FundingSigned>) where L::Target: Logger {
2416 let counterparty_keys = self.build_remote_transaction_keys();
2417 let counterparty_initial_commitment_tx = self.build_commitment_transaction(self.cur_counterparty_commitment_transaction_number + 1, &counterparty_keys, false, false, logger).tx;
2419 let counterparty_trusted_tx = counterparty_initial_commitment_tx.trust();
2420 let counterparty_initial_bitcoin_tx = counterparty_trusted_tx.built_transaction();
2421 log_trace!(logger, "Initial counterparty tx for channel {} is: txid {} tx {}",
2422 &self.channel_id(), counterparty_initial_bitcoin_tx.txid, encode::serialize_hex(&counterparty_initial_bitcoin_tx.transaction));
2424 match &self.holder_signer {
2425 // TODO (arik): move match into calling method for Taproot
2426 ChannelSignerType::Ecdsa(ecdsa) => {
2427 let funding_signed = ecdsa.sign_counterparty_commitment(&counterparty_initial_commitment_tx, Vec::new(), Vec::new(), &self.secp_ctx)
2428 .map(|(signature, _)| msgs::FundingSigned {
2429 channel_id: self.channel_id(),
2432 partial_signature_with_nonce: None,
2436 if funding_signed.is_none() {
2437 log_trace!(logger, "Counterparty commitment signature not available for funding_signed message; setting signer_pending_funding");
2438 self.signer_pending_funding = true;
2439 } else if self.signer_pending_funding {
2440 log_trace!(logger, "Counterparty commitment signature available for funding_signed message; clearing signer_pending_funding");
2441 self.signer_pending_funding = false;
2444 // We sign "counterparty" commitment transaction, allowing them to broadcast the tx if they wish.
2445 (counterparty_initial_commitment_tx, funding_signed)
2447 // TODO (taproot|arik)
2454 // Internal utility functions for channels
2456 /// Returns the value to use for `holder_max_htlc_value_in_flight_msat` as a percentage of the
2457 /// `channel_value_satoshis` in msat, set through
2458 /// [`ChannelHandshakeConfig::max_inbound_htlc_value_in_flight_percent_of_channel`]
2460 /// The effective percentage is lower bounded by 1% and upper bounded by 100%.
2462 /// [`ChannelHandshakeConfig::max_inbound_htlc_value_in_flight_percent_of_channel`]: crate::util::config::ChannelHandshakeConfig::max_inbound_htlc_value_in_flight_percent_of_channel
2463 fn get_holder_max_htlc_value_in_flight_msat(channel_value_satoshis: u64, config: &ChannelHandshakeConfig) -> u64 {
2464 let configured_percent = if config.max_inbound_htlc_value_in_flight_percent_of_channel < 1 {
2466 } else if config.max_inbound_htlc_value_in_flight_percent_of_channel > 100 {
2469 config.max_inbound_htlc_value_in_flight_percent_of_channel as u64
2471 channel_value_satoshis * 10 * configured_percent
2474 /// Returns a minimum channel reserve value the remote needs to maintain,
2475 /// required by us according to the configured or default
2476 /// [`ChannelHandshakeConfig::their_channel_reserve_proportional_millionths`]
2478 /// Guaranteed to return a value no larger than channel_value_satoshis
2480 /// This is used both for outbound and inbound channels and has lower bound
2481 /// of `MIN_THEIR_CHAN_RESERVE_SATOSHIS`.
2482 pub(crate) fn get_holder_selected_channel_reserve_satoshis(channel_value_satoshis: u64, config: &UserConfig) -> u64 {
2483 let calculated_reserve = channel_value_satoshis.saturating_mul(config.channel_handshake_config.their_channel_reserve_proportional_millionths as u64) / 1_000_000;
2484 cmp::min(channel_value_satoshis, cmp::max(calculated_reserve, MIN_THEIR_CHAN_RESERVE_SATOSHIS))
2487 /// This is for legacy reasons, present for forward-compatibility.
2488 /// LDK versions older than 0.0.104 don't know how read/handle values other than default
2489 /// from storage. Hence, we use this function to not persist default values of
2490 /// `holder_selected_channel_reserve_satoshis` for channels into storage.
2491 pub(crate) fn get_legacy_default_holder_selected_channel_reserve_satoshis(channel_value_satoshis: u64) -> u64 {
2492 let (q, _) = channel_value_satoshis.overflowing_div(100);
2493 cmp::min(channel_value_satoshis, cmp::max(q, 1000))
2496 // Get the fee cost in SATS of a commitment tx with a given number of HTLC outputs.
2497 // Note that num_htlcs should not include dust HTLCs.
2499 fn commit_tx_fee_sat(feerate_per_kw: u32, num_htlcs: usize, channel_type_features: &ChannelTypeFeatures) -> u64 {
2500 feerate_per_kw as u64 * (commitment_tx_base_weight(channel_type_features) + num_htlcs as u64 * COMMITMENT_TX_WEIGHT_PER_HTLC) / 1000
2503 // Get the fee cost in MSATS of a commitment tx with a given number of HTLC outputs.
2504 // Note that num_htlcs should not include dust HTLCs.
2505 pub(crate) fn commit_tx_fee_msat(feerate_per_kw: u32, num_htlcs: usize, channel_type_features: &ChannelTypeFeatures) -> u64 {
2506 // Note that we need to divide before multiplying to round properly,
2507 // since the lowest denomination of bitcoin on-chain is the satoshi.
2508 (commitment_tx_base_weight(channel_type_features) + num_htlcs as u64 * COMMITMENT_TX_WEIGHT_PER_HTLC) * feerate_per_kw as u64 / 1000 * 1000
2511 // Holder designates channel data owned for the benefit of the user client.
2512 // Counterparty designates channel data owned by the another channel participant entity.
2513 pub(super) struct Channel<SP: Deref> where SP::Target: SignerProvider {
2514 pub context: ChannelContext<SP>,
2517 #[cfg(any(test, fuzzing))]
2518 struct CommitmentTxInfoCached {
2520 total_pending_htlcs: usize,
2521 next_holder_htlc_id: u64,
2522 next_counterparty_htlc_id: u64,
2526 /// Contents of a wire message that fails an HTLC backwards. Useful for [`Channel::fail_htlc`] to
2527 /// fail with either [`msgs::UpdateFailMalformedHTLC`] or [`msgs::UpdateFailHTLC`] as needed.
2528 trait FailHTLCContents {
2529 type Message: FailHTLCMessageName;
2530 fn to_message(self, htlc_id: u64, channel_id: ChannelId) -> Self::Message;
2531 fn to_inbound_htlc_state(self) -> InboundHTLCState;
2532 fn to_htlc_update_awaiting_ack(self, htlc_id: u64) -> HTLCUpdateAwaitingACK;
2534 impl FailHTLCContents for msgs::OnionErrorPacket {
2535 type Message = msgs::UpdateFailHTLC;
2536 fn to_message(self, htlc_id: u64, channel_id: ChannelId) -> Self::Message {
2537 msgs::UpdateFailHTLC { htlc_id, channel_id, reason: self }
2539 fn to_inbound_htlc_state(self) -> InboundHTLCState {
2540 InboundHTLCState::LocalRemoved(InboundHTLCRemovalReason::FailRelay(self))
2542 fn to_htlc_update_awaiting_ack(self, htlc_id: u64) -> HTLCUpdateAwaitingACK {
2543 HTLCUpdateAwaitingACK::FailHTLC { htlc_id, err_packet: self }
2546 impl FailHTLCContents for (u16, [u8; 32]) {
2547 type Message = msgs::UpdateFailMalformedHTLC; // (failure_code, sha256_of_onion)
2548 fn to_message(self, htlc_id: u64, channel_id: ChannelId) -> Self::Message {
2549 msgs::UpdateFailMalformedHTLC {
2552 failure_code: self.0,
2553 sha256_of_onion: self.1
2556 fn to_inbound_htlc_state(self) -> InboundHTLCState {
2557 InboundHTLCState::LocalRemoved(
2558 InboundHTLCRemovalReason::FailMalformed((self.1, self.0))
2561 fn to_htlc_update_awaiting_ack(self, htlc_id: u64) -> HTLCUpdateAwaitingACK {
2562 HTLCUpdateAwaitingACK::FailMalformedHTLC {
2564 failure_code: self.0,
2565 sha256_of_onion: self.1
2570 trait FailHTLCMessageName {
2571 fn name() -> &'static str;
2573 impl FailHTLCMessageName for msgs::UpdateFailHTLC {
2574 fn name() -> &'static str {
2578 impl FailHTLCMessageName for msgs::UpdateFailMalformedHTLC {
2579 fn name() -> &'static str {
2580 "update_fail_malformed_htlc"
2584 impl<SP: Deref> Channel<SP> where
2585 SP::Target: SignerProvider,
2586 <SP::Target as SignerProvider>::EcdsaSigner: WriteableEcdsaChannelSigner
2588 fn check_remote_fee<F: Deref, L: Deref>(
2589 channel_type: &ChannelTypeFeatures, fee_estimator: &LowerBoundedFeeEstimator<F>,
2590 feerate_per_kw: u32, cur_feerate_per_kw: Option<u32>, logger: &L
2591 ) -> Result<(), ChannelError> where F::Target: FeeEstimator, L::Target: Logger,
2593 let lower_limit_conf_target = if channel_type.supports_anchors_zero_fee_htlc_tx() {
2594 ConfirmationTarget::MinAllowedAnchorChannelRemoteFee
2596 ConfirmationTarget::MinAllowedNonAnchorChannelRemoteFee
2598 let lower_limit = fee_estimator.bounded_sat_per_1000_weight(lower_limit_conf_target);
2599 if feerate_per_kw < lower_limit {
2600 if let Some(cur_feerate) = cur_feerate_per_kw {
2601 if feerate_per_kw > cur_feerate {
2603 "Accepting feerate that may prevent us from closing this channel because it's higher than what we have now. Had {} s/kW, now {} s/kW.",
2604 cur_feerate, feerate_per_kw);
2608 return Err(ChannelError::Close(format!("Peer's feerate much too low. Actual: {}. Our expected lower limit: {}", feerate_per_kw, lower_limit)));
2614 fn get_closing_scriptpubkey(&self) -> ScriptBuf {
2615 // The shutdown scriptpubkey is set on channel opening when option_upfront_shutdown_script
2616 // is signaled. Otherwise, it is set when sending a shutdown message. Calling this method
2617 // outside of those situations will fail.
2618 self.context.shutdown_scriptpubkey.clone().unwrap().into_inner()
2622 fn get_closing_transaction_weight(&self, a_scriptpubkey: Option<&Script>, b_scriptpubkey: Option<&Script>) -> u64 {
2627 1 + // script length (0)
2631 )*4 + // * 4 for non-witness parts
2632 2 + // witness marker and flag
2633 1 + // witness element count
2634 4 + // 4 element lengths (2 sigs, multisig dummy, and witness script)
2635 self.context.get_funding_redeemscript().len() as u64 + // funding witness script
2636 2*(1 + 71); // two signatures + sighash type flags
2637 if let Some(spk) = a_scriptpubkey {
2638 ret += ((8+1) + // output values and script length
2639 spk.len() as u64) * 4; // scriptpubkey and witness multiplier
2641 if let Some(spk) = b_scriptpubkey {
2642 ret += ((8+1) + // output values and script length
2643 spk.len() as u64) * 4; // scriptpubkey and witness multiplier
2649 fn build_closing_transaction(&self, proposed_total_fee_satoshis: u64, skip_remote_output: bool) -> (ClosingTransaction, u64) {
2650 assert!(self.context.pending_inbound_htlcs.is_empty());
2651 assert!(self.context.pending_outbound_htlcs.is_empty());
2652 assert!(self.context.pending_update_fee.is_none());
2654 let mut total_fee_satoshis = proposed_total_fee_satoshis;
2655 let mut value_to_holder: i64 = (self.context.value_to_self_msat as i64) / 1000 - if self.context.is_outbound() { total_fee_satoshis as i64 } else { 0 };
2656 let mut value_to_counterparty: i64 = ((self.context.channel_value_satoshis * 1000 - self.context.value_to_self_msat) as i64 / 1000) - if self.context.is_outbound() { 0 } else { total_fee_satoshis as i64 };
2658 if value_to_holder < 0 {
2659 assert!(self.context.is_outbound());
2660 total_fee_satoshis += (-value_to_holder) as u64;
2661 } else if value_to_counterparty < 0 {
2662 assert!(!self.context.is_outbound());
2663 total_fee_satoshis += (-value_to_counterparty) as u64;
2666 if skip_remote_output || value_to_counterparty as u64 <= self.context.holder_dust_limit_satoshis {
2667 value_to_counterparty = 0;
2670 if value_to_holder as u64 <= self.context.holder_dust_limit_satoshis {
2671 value_to_holder = 0;
2674 assert!(self.context.shutdown_scriptpubkey.is_some());
2675 let holder_shutdown_script = self.get_closing_scriptpubkey();
2676 let counterparty_shutdown_script = self.context.counterparty_shutdown_scriptpubkey.clone().unwrap();
2677 let funding_outpoint = self.funding_outpoint().into_bitcoin_outpoint();
2679 let closing_transaction = ClosingTransaction::new(value_to_holder as u64, value_to_counterparty as u64, holder_shutdown_script, counterparty_shutdown_script, funding_outpoint);
2680 (closing_transaction, total_fee_satoshis)
2683 fn funding_outpoint(&self) -> OutPoint {
2684 self.context.channel_transaction_parameters.funding_outpoint.unwrap()
2687 /// Claims an HTLC while we're disconnected from a peer, dropping the [`ChannelMonitorUpdate`]
2690 /// The [`ChannelMonitor`] for this channel MUST be updated out-of-band with the preimage
2691 /// provided (i.e. without calling [`crate::chain::Watch::update_channel`]).
2693 /// The HTLC claim will end up in the holding cell (because the caller must ensure the peer is
2695 pub fn claim_htlc_while_disconnected_dropping_mon_update<L: Deref>
2696 (&mut self, htlc_id_arg: u64, payment_preimage_arg: PaymentPreimage, logger: &L)
2697 where L::Target: Logger {
2698 // Assert that we'll add the HTLC claim to the holding cell in `get_update_fulfill_htlc`
2699 // (see equivalent if condition there).
2700 assert!(self.context.channel_state.should_force_holding_cell());
2701 let mon_update_id = self.context.latest_monitor_update_id; // Forget the ChannelMonitor update
2702 let fulfill_resp = self.get_update_fulfill_htlc(htlc_id_arg, payment_preimage_arg, logger);
2703 self.context.latest_monitor_update_id = mon_update_id;
2704 if let UpdateFulfillFetch::NewClaim { msg, .. } = fulfill_resp {
2705 assert!(msg.is_none()); // The HTLC must have ended up in the holding cell.
2709 fn get_update_fulfill_htlc<L: Deref>(&mut self, htlc_id_arg: u64, payment_preimage_arg: PaymentPreimage, logger: &L) -> UpdateFulfillFetch where L::Target: Logger {
2710 // Either ChannelReady got set (which means it won't be unset) or there is no way any
2711 // caller thought we could have something claimed (cause we wouldn't have accepted in an
2712 // incoming HTLC anyway). If we got to ShutdownComplete, callers aren't allowed to call us,
2714 if !matches!(self.context.channel_state, ChannelState::ChannelReady(_)) {
2715 panic!("Was asked to fulfill an HTLC when channel was not in an operational state");
2718 // ChannelManager may generate duplicate claims/fails due to HTLC update events from
2719 // on-chain ChannelsMonitors during block rescan. Ideally we'd figure out a way to drop
2720 // these, but for now we just have to treat them as normal.
2722 let mut pending_idx = core::usize::MAX;
2723 let mut htlc_value_msat = 0;
2724 for (idx, htlc) in self.context.pending_inbound_htlcs.iter().enumerate() {
2725 if htlc.htlc_id == htlc_id_arg {
2726 debug_assert_eq!(htlc.payment_hash, PaymentHash(Sha256::hash(&payment_preimage_arg.0[..]).to_byte_array()));
2727 log_debug!(logger, "Claiming inbound HTLC id {} with payment hash {} with preimage {}",
2728 htlc.htlc_id, htlc.payment_hash, payment_preimage_arg);
2730 InboundHTLCState::Committed => {},
2731 InboundHTLCState::LocalRemoved(ref reason) => {
2732 if let &InboundHTLCRemovalReason::Fulfill(_) = reason {
2734 log_warn!(logger, "Have preimage and want to fulfill HTLC with payment hash {} we already failed against channel {}", &htlc.payment_hash, &self.context.channel_id());
2735 debug_assert!(false, "Tried to fulfill an HTLC that was already failed");
2737 return UpdateFulfillFetch::DuplicateClaim {};
2740 debug_assert!(false, "Have an inbound HTLC we tried to claim before it was fully committed to");
2741 // Don't return in release mode here so that we can update channel_monitor
2745 htlc_value_msat = htlc.amount_msat;
2749 if pending_idx == core::usize::MAX {
2750 #[cfg(any(test, fuzzing))]
2751 // If we failed to find an HTLC to fulfill, make sure it was previously fulfilled and
2752 // this is simply a duplicate claim, not previously failed and we lost funds.
2753 debug_assert!(self.context.historical_inbound_htlc_fulfills.contains(&htlc_id_arg));
2754 return UpdateFulfillFetch::DuplicateClaim {};
2757 // Now update local state:
2759 // We have to put the payment_preimage in the channel_monitor right away here to ensure we
2760 // can claim it even if the channel hits the chain before we see their next commitment.
2761 self.context.latest_monitor_update_id += 1;
2762 let monitor_update = ChannelMonitorUpdate {
2763 update_id: self.context.latest_monitor_update_id,
2764 updates: vec![ChannelMonitorUpdateStep::PaymentPreimage {
2765 payment_preimage: payment_preimage_arg.clone(),
2769 if self.context.channel_state.should_force_holding_cell() {
2770 // Note that this condition is the same as the assertion in
2771 // `claim_htlc_while_disconnected_dropping_mon_update` and must match exactly -
2772 // `claim_htlc_while_disconnected_dropping_mon_update` would not work correctly if we
2773 // do not not get into this branch.
2774 for pending_update in self.context.holding_cell_htlc_updates.iter() {
2775 match pending_update {
2776 &HTLCUpdateAwaitingACK::ClaimHTLC { htlc_id, .. } => {
2777 if htlc_id_arg == htlc_id {
2778 // Make sure we don't leave latest_monitor_update_id incremented here:
2779 self.context.latest_monitor_update_id -= 1;
2780 #[cfg(any(test, fuzzing))]
2781 debug_assert!(self.context.historical_inbound_htlc_fulfills.contains(&htlc_id_arg));
2782 return UpdateFulfillFetch::DuplicateClaim {};
2785 &HTLCUpdateAwaitingACK::FailHTLC { htlc_id, .. } |
2786 &HTLCUpdateAwaitingACK::FailMalformedHTLC { htlc_id, .. } =>
2788 if htlc_id_arg == htlc_id {
2789 log_warn!(logger, "Have preimage and want to fulfill HTLC with pending failure against channel {}", &self.context.channel_id());
2790 // TODO: We may actually be able to switch to a fulfill here, though its
2791 // rare enough it may not be worth the complexity burden.
2792 debug_assert!(false, "Tried to fulfill an HTLC that was already failed");
2793 return UpdateFulfillFetch::NewClaim { monitor_update, htlc_value_msat, msg: None };
2799 log_trace!(logger, "Adding HTLC claim to holding_cell in channel {}! Current state: {}", &self.context.channel_id(), self.context.channel_state.to_u32());
2800 self.context.holding_cell_htlc_updates.push(HTLCUpdateAwaitingACK::ClaimHTLC {
2801 payment_preimage: payment_preimage_arg, htlc_id: htlc_id_arg,
2803 #[cfg(any(test, fuzzing))]
2804 self.context.historical_inbound_htlc_fulfills.insert(htlc_id_arg);
2805 return UpdateFulfillFetch::NewClaim { monitor_update, htlc_value_msat, msg: None };
2807 #[cfg(any(test, fuzzing))]
2808 self.context.historical_inbound_htlc_fulfills.insert(htlc_id_arg);
2811 let htlc = &mut self.context.pending_inbound_htlcs[pending_idx];
2812 if let InboundHTLCState::Committed = htlc.state {
2814 debug_assert!(false, "Have an inbound HTLC we tried to claim before it was fully committed to");
2815 return UpdateFulfillFetch::NewClaim { monitor_update, htlc_value_msat, msg: None };
2817 log_trace!(logger, "Upgrading HTLC {} to LocalRemoved with a Fulfill in channel {}!", &htlc.payment_hash, &self.context.channel_id);
2818 htlc.state = InboundHTLCState::LocalRemoved(InboundHTLCRemovalReason::Fulfill(payment_preimage_arg.clone()));
2821 UpdateFulfillFetch::NewClaim {
2824 msg: Some(msgs::UpdateFulfillHTLC {
2825 channel_id: self.context.channel_id(),
2826 htlc_id: htlc_id_arg,
2827 payment_preimage: payment_preimage_arg,
2832 pub fn get_update_fulfill_htlc_and_commit<L: Deref>(&mut self, htlc_id: u64, payment_preimage: PaymentPreimage, logger: &L) -> UpdateFulfillCommitFetch where L::Target: Logger {
2833 let release_cs_monitor = self.context.blocked_monitor_updates.is_empty();
2834 match self.get_update_fulfill_htlc(htlc_id, payment_preimage, logger) {
2835 UpdateFulfillFetch::NewClaim { mut monitor_update, htlc_value_msat, msg } => {
2836 // Even if we aren't supposed to let new monitor updates with commitment state
2837 // updates run, we still need to push the preimage ChannelMonitorUpdateStep no
2838 // matter what. Sadly, to push a new monitor update which flies before others
2839 // already queued, we have to insert it into the pending queue and update the
2840 // update_ids of all the following monitors.
2841 if release_cs_monitor && msg.is_some() {
2842 let mut additional_update = self.build_commitment_no_status_check(logger);
2843 // build_commitment_no_status_check may bump latest_monitor_id but we want them
2844 // to be strictly increasing by one, so decrement it here.
2845 self.context.latest_monitor_update_id = monitor_update.update_id;
2846 monitor_update.updates.append(&mut additional_update.updates);
2848 let new_mon_id = self.context.blocked_monitor_updates.get(0)
2849 .map(|upd| upd.update.update_id).unwrap_or(monitor_update.update_id);
2850 monitor_update.update_id = new_mon_id;
2851 for held_update in self.context.blocked_monitor_updates.iter_mut() {
2852 held_update.update.update_id += 1;
2855 debug_assert!(false, "If there is a pending blocked monitor we should have MonitorUpdateInProgress set");
2856 let update = self.build_commitment_no_status_check(logger);
2857 self.context.blocked_monitor_updates.push(PendingChannelMonitorUpdate {
2863 self.monitor_updating_paused(false, msg.is_some(), false, Vec::new(), Vec::new(), Vec::new());
2864 UpdateFulfillCommitFetch::NewClaim { monitor_update, htlc_value_msat, }
2866 UpdateFulfillFetch::DuplicateClaim {} => UpdateFulfillCommitFetch::DuplicateClaim {},
2870 /// We can only have one resolution per HTLC. In some cases around reconnect, we may fulfill
2871 /// an HTLC more than once or fulfill once and then attempt to fail after reconnect. We cannot,
2872 /// however, fail more than once as we wait for an upstream failure to be irrevocably committed
2873 /// before we fail backwards.
2875 /// If we do fail twice, we `debug_assert!(false)` and return `Ok(None)`. Thus, this will always
2876 /// return `Ok(_)` if preconditions are met. In any case, `Err`s will only be
2877 /// [`ChannelError::Ignore`].
2878 pub fn queue_fail_htlc<L: Deref>(&mut self, htlc_id_arg: u64, err_packet: msgs::OnionErrorPacket, logger: &L)
2879 -> Result<(), ChannelError> where L::Target: Logger {
2880 self.fail_htlc(htlc_id_arg, err_packet, true, logger)
2881 .map(|msg_opt| assert!(msg_opt.is_none(), "We forced holding cell?"))
2884 /// Used for failing back with [`msgs::UpdateFailMalformedHTLC`]. For now, this is used when we
2885 /// want to fail blinded HTLCs where we are not the intro node.
2887 /// See [`Self::queue_fail_htlc`] for more info.
2888 pub fn queue_fail_malformed_htlc<L: Deref>(
2889 &mut self, htlc_id_arg: u64, failure_code: u16, sha256_of_onion: [u8; 32], logger: &L
2890 ) -> Result<(), ChannelError> where L::Target: Logger {
2891 self.fail_htlc(htlc_id_arg, (failure_code, sha256_of_onion), true, logger)
2892 .map(|msg_opt| assert!(msg_opt.is_none(), "We forced holding cell?"))
2895 /// We can only have one resolution per HTLC. In some cases around reconnect, we may fulfill
2896 /// an HTLC more than once or fulfill once and then attempt to fail after reconnect. We cannot,
2897 /// however, fail more than once as we wait for an upstream failure to be irrevocably committed
2898 /// before we fail backwards.
2900 /// If we do fail twice, we `debug_assert!(false)` and return `Ok(None)`. Thus, this will always
2901 /// return `Ok(_)` if preconditions are met. In any case, `Err`s will only be
2902 /// [`ChannelError::Ignore`].
2903 fn fail_htlc<L: Deref, E: FailHTLCContents + Clone>(
2904 &mut self, htlc_id_arg: u64, err_packet: E, mut force_holding_cell: bool,
2906 ) -> Result<Option<E::Message>, ChannelError> where L::Target: Logger {
2907 if !matches!(self.context.channel_state, ChannelState::ChannelReady(_)) {
2908 panic!("Was asked to fail an HTLC when channel was not in an operational state");
2911 // ChannelManager may generate duplicate claims/fails due to HTLC update events from
2912 // on-chain ChannelsMonitors during block rescan. Ideally we'd figure out a way to drop
2913 // these, but for now we just have to treat them as normal.
2915 let mut pending_idx = core::usize::MAX;
2916 for (idx, htlc) in self.context.pending_inbound_htlcs.iter().enumerate() {
2917 if htlc.htlc_id == htlc_id_arg {
2919 InboundHTLCState::Committed => {},
2920 InboundHTLCState::LocalRemoved(ref reason) => {
2921 if let &InboundHTLCRemovalReason::Fulfill(_) = reason {
2923 debug_assert!(false, "Tried to fail an HTLC that was already failed");
2928 debug_assert!(false, "Have an inbound HTLC we tried to claim before it was fully committed to");
2929 return Err(ChannelError::Ignore(format!("Unable to find a pending HTLC which matched the given HTLC ID ({})", htlc.htlc_id)));
2935 if pending_idx == core::usize::MAX {
2936 #[cfg(any(test, fuzzing))]
2937 // If we failed to find an HTLC to fail, make sure it was previously fulfilled and this
2938 // is simply a duplicate fail, not previously failed and we failed-back too early.
2939 debug_assert!(self.context.historical_inbound_htlc_fulfills.contains(&htlc_id_arg));
2943 if self.context.channel_state.should_force_holding_cell() {
2944 debug_assert!(force_holding_cell, "!force_holding_cell is only called when emptying the holding cell, so we shouldn't end up back in it!");
2945 force_holding_cell = true;
2948 // Now update local state:
2949 if force_holding_cell {
2950 for pending_update in self.context.holding_cell_htlc_updates.iter() {
2951 match pending_update {
2952 &HTLCUpdateAwaitingACK::ClaimHTLC { htlc_id, .. } => {
2953 if htlc_id_arg == htlc_id {
2954 #[cfg(any(test, fuzzing))]
2955 debug_assert!(self.context.historical_inbound_htlc_fulfills.contains(&htlc_id_arg));
2959 &HTLCUpdateAwaitingACK::FailHTLC { htlc_id, .. } |
2960 &HTLCUpdateAwaitingACK::FailMalformedHTLC { htlc_id, .. } =>
2962 if htlc_id_arg == htlc_id {
2963 debug_assert!(false, "Tried to fail an HTLC that was already failed");
2964 return Err(ChannelError::Ignore("Unable to find a pending HTLC which matched the given HTLC ID".to_owned()));
2970 log_trace!(logger, "Placing failure for HTLC ID {} in holding cell in channel {}.", htlc_id_arg, &self.context.channel_id());
2971 self.context.holding_cell_htlc_updates.push(err_packet.to_htlc_update_awaiting_ack(htlc_id_arg));
2975 log_trace!(logger, "Failing HTLC ID {} back with {} message in channel {}.", htlc_id_arg,
2976 E::Message::name(), &self.context.channel_id());
2978 let htlc = &mut self.context.pending_inbound_htlcs[pending_idx];
2979 htlc.state = err_packet.clone().to_inbound_htlc_state();
2982 Ok(Some(err_packet.to_message(htlc_id_arg, self.context.channel_id())))
2985 // Message handlers:
2986 /// Updates the state of the channel to indicate that all channels in the batch have received
2987 /// funding_signed and persisted their monitors.
2988 /// The funding transaction is consequently allowed to be broadcast, and the channel can be
2989 /// treated as a non-batch channel going forward.
2990 pub fn set_batch_ready(&mut self) {
2991 self.context.is_batch_funding = None;
2992 self.context.channel_state.clear_waiting_for_batch();
2995 /// Handles a channel_ready message from our peer. If we've already sent our channel_ready
2996 /// and the channel is now usable (and public), this may generate an announcement_signatures to
2998 pub fn channel_ready<NS: Deref, L: Deref>(
2999 &mut self, msg: &msgs::ChannelReady, node_signer: &NS, chain_hash: ChainHash,
3000 user_config: &UserConfig, best_block: &BestBlock, logger: &L
3001 ) -> Result<Option<msgs::AnnouncementSignatures>, ChannelError>
3003 NS::Target: NodeSigner,
3006 if self.context.channel_state.is_peer_disconnected() {
3007 self.context.workaround_lnd_bug_4006 = Some(msg.clone());
3008 return Err(ChannelError::Ignore("Peer sent channel_ready when we needed a channel_reestablish. The peer is likely lnd, see https://github.com/lightningnetwork/lnd/issues/4006".to_owned()));
3011 if let Some(scid_alias) = msg.short_channel_id_alias {
3012 if Some(scid_alias) != self.context.short_channel_id {
3013 // The scid alias provided can be used to route payments *from* our counterparty,
3014 // i.e. can be used for inbound payments and provided in invoices, but is not used
3015 // when routing outbound payments.
3016 self.context.latest_inbound_scid_alias = Some(scid_alias);
3020 // Our channel_ready shouldn't have been sent if we are waiting for other channels in the
3021 // batch, but we can receive channel_ready messages.
3022 let mut check_reconnection = false;
3023 match &self.context.channel_state {
3024 ChannelState::AwaitingChannelReady(flags) => {
3025 let flags = *flags & !FundedStateFlags::ALL;
3026 debug_assert!(!flags.is_set(AwaitingChannelReadyFlags::OUR_CHANNEL_READY) || !flags.is_set(AwaitingChannelReadyFlags::WAITING_FOR_BATCH));
3027 if flags & !AwaitingChannelReadyFlags::WAITING_FOR_BATCH == AwaitingChannelReadyFlags::THEIR_CHANNEL_READY {
3028 // If we reconnected before sending our `channel_ready` they may still resend theirs.
3029 check_reconnection = true;
3030 } else if (flags & !AwaitingChannelReadyFlags::WAITING_FOR_BATCH).is_empty() {
3031 self.context.channel_state.set_their_channel_ready();
3032 } else if flags == AwaitingChannelReadyFlags::OUR_CHANNEL_READY {
3033 self.context.channel_state = ChannelState::ChannelReady(self.context.channel_state.with_funded_state_flags_mask().into());
3034 self.context.update_time_counter += 1;
3036 // We're in `WAITING_FOR_BATCH`, so we should wait until we're ready.
3037 debug_assert!(flags.is_set(AwaitingChannelReadyFlags::WAITING_FOR_BATCH));
3040 // If we reconnected before sending our `channel_ready` they may still resend theirs.
3041 ChannelState::ChannelReady(_) => check_reconnection = true,
3042 _ => return Err(ChannelError::Close("Peer sent a channel_ready at a strange time".to_owned())),
3044 if check_reconnection {
3045 // They probably disconnected/reconnected and re-sent the channel_ready, which is
3046 // required, or they're sending a fresh SCID alias.
3047 let expected_point =
3048 if self.context.cur_counterparty_commitment_transaction_number == INITIAL_COMMITMENT_NUMBER - 1 {
3049 // If they haven't ever sent an updated point, the point they send should match
3051 self.context.counterparty_cur_commitment_point
3052 } else if self.context.cur_counterparty_commitment_transaction_number == INITIAL_COMMITMENT_NUMBER - 2 {
3053 // If we've advanced the commitment number once, the second commitment point is
3054 // at `counterparty_prev_commitment_point`, which is not yet revoked.
3055 debug_assert!(self.context.counterparty_prev_commitment_point.is_some());
3056 self.context.counterparty_prev_commitment_point
3058 // If they have sent updated points, channel_ready is always supposed to match
3059 // their "first" point, which we re-derive here.
3060 Some(PublicKey::from_secret_key(&self.context.secp_ctx, &SecretKey::from_slice(
3061 &self.context.commitment_secrets.get_secret(INITIAL_COMMITMENT_NUMBER - 1).expect("We should have all prev secrets available")
3062 ).expect("We already advanced, so previous secret keys should have been validated already")))
3064 if expected_point != Some(msg.next_per_commitment_point) {
3065 return Err(ChannelError::Close("Peer sent a reconnect channel_ready with a different point".to_owned()));
3070 self.context.counterparty_prev_commitment_point = self.context.counterparty_cur_commitment_point;
3071 self.context.counterparty_cur_commitment_point = Some(msg.next_per_commitment_point);
3073 log_info!(logger, "Received channel_ready from peer for channel {}", &self.context.channel_id());
3075 Ok(self.get_announcement_sigs(node_signer, chain_hash, user_config, best_block.height(), logger))
3078 pub fn update_add_htlc<F, FE: Deref, L: Deref>(
3079 &mut self, msg: &msgs::UpdateAddHTLC, mut pending_forward_status: PendingHTLCStatus,
3080 create_pending_htlc_status: F, fee_estimator: &LowerBoundedFeeEstimator<FE>, logger: &L
3081 ) -> Result<(), ChannelError>
3082 where F: for<'a> Fn(&'a Self, PendingHTLCStatus, u16) -> PendingHTLCStatus,
3083 FE::Target: FeeEstimator, L::Target: Logger,
3085 if !matches!(self.context.channel_state, ChannelState::ChannelReady(_)) {
3086 return Err(ChannelError::Close("Got add HTLC message when channel was not in an operational state".to_owned()));
3088 // We can't accept HTLCs sent after we've sent a shutdown.
3089 if self.context.channel_state.is_local_shutdown_sent() {
3090 pending_forward_status = create_pending_htlc_status(self, pending_forward_status, 0x4000|8);
3092 // If the remote has sent a shutdown prior to adding this HTLC, then they are in violation of the spec.
3093 if self.context.channel_state.is_remote_shutdown_sent() {
3094 return Err(ChannelError::Close("Got add HTLC message when channel was not in an operational state".to_owned()));
3096 if self.context.channel_state.is_peer_disconnected() {
3097 return Err(ChannelError::Close("Peer sent update_add_htlc when we needed a channel_reestablish".to_owned()));
3099 if msg.amount_msat > self.context.channel_value_satoshis * 1000 {
3100 return Err(ChannelError::Close("Remote side tried to send more than the total value of the channel".to_owned()));
3102 if msg.amount_msat == 0 {
3103 return Err(ChannelError::Close("Remote side tried to send a 0-msat HTLC".to_owned()));
3105 if msg.amount_msat < self.context.holder_htlc_minimum_msat {
3106 return Err(ChannelError::Close(format!("Remote side tried to send less than our minimum HTLC value. Lower limit: ({}). Actual: ({})", self.context.holder_htlc_minimum_msat, msg.amount_msat)));
3109 let inbound_stats = self.context.get_inbound_pending_htlc_stats(None);
3110 let outbound_stats = self.context.get_outbound_pending_htlc_stats(None);
3111 if inbound_stats.pending_htlcs + 1 > self.context.holder_max_accepted_htlcs as u32 {
3112 return Err(ChannelError::Close(format!("Remote tried to push more than our max accepted HTLCs ({})", self.context.holder_max_accepted_htlcs)));
3114 if inbound_stats.pending_htlcs_value_msat + msg.amount_msat > self.context.holder_max_htlc_value_in_flight_msat {
3115 return Err(ChannelError::Close(format!("Remote HTLC add would put them over our max HTLC value ({})", self.context.holder_max_htlc_value_in_flight_msat)));
3118 // Check holder_selected_channel_reserve_satoshis (we're getting paid, so they have to at least meet
3119 // the reserve_satoshis we told them to always have as direct payment so that they lose
3120 // something if we punish them for broadcasting an old state).
3121 // Note that we don't really care about having a small/no to_remote output in our local
3122 // commitment transactions, as the purpose of the channel reserve is to ensure we can
3123 // punish *them* if they misbehave, so we discount any outbound HTLCs which will not be
3124 // present in the next commitment transaction we send them (at least for fulfilled ones,
3125 // failed ones won't modify value_to_self).
3126 // Note that we will send HTLCs which another instance of rust-lightning would think
3127 // violate the reserve value if we do not do this (as we forget inbound HTLCs from the
3128 // Channel state once they will not be present in the next received commitment
3130 let mut removed_outbound_total_msat = 0;
3131 for ref htlc in self.context.pending_outbound_htlcs.iter() {
3132 if let OutboundHTLCState::AwaitingRemoteRevokeToRemove(OutboundHTLCOutcome::Success(_)) = htlc.state {
3133 removed_outbound_total_msat += htlc.amount_msat;
3134 } else if let OutboundHTLCState::AwaitingRemovedRemoteRevoke(OutboundHTLCOutcome::Success(_)) = htlc.state {
3135 removed_outbound_total_msat += htlc.amount_msat;
3139 let max_dust_htlc_exposure_msat = self.context.get_max_dust_htlc_exposure_msat(fee_estimator);
3140 let (htlc_timeout_dust_limit, htlc_success_dust_limit) = if self.context.get_channel_type().supports_anchors_zero_fee_htlc_tx() {
3143 let dust_buffer_feerate = self.context.get_dust_buffer_feerate(None) as u64;
3144 (dust_buffer_feerate * htlc_timeout_tx_weight(self.context.get_channel_type()) / 1000,
3145 dust_buffer_feerate * htlc_success_tx_weight(self.context.get_channel_type()) / 1000)
3147 let exposure_dust_limit_timeout_sats = htlc_timeout_dust_limit + self.context.counterparty_dust_limit_satoshis;
3148 if msg.amount_msat / 1000 < exposure_dust_limit_timeout_sats {
3149 let on_counterparty_tx_dust_htlc_exposure_msat = inbound_stats.on_counterparty_tx_dust_exposure_msat + outbound_stats.on_counterparty_tx_dust_exposure_msat + msg.amount_msat;
3150 if on_counterparty_tx_dust_htlc_exposure_msat > max_dust_htlc_exposure_msat {
3151 log_info!(logger, "Cannot accept value that would put our exposure to dust HTLCs at {} over the limit {} on counterparty commitment tx",
3152 on_counterparty_tx_dust_htlc_exposure_msat, max_dust_htlc_exposure_msat);
3153 pending_forward_status = create_pending_htlc_status(self, pending_forward_status, 0x1000|7);
3157 let exposure_dust_limit_success_sats = htlc_success_dust_limit + self.context.holder_dust_limit_satoshis;
3158 if msg.amount_msat / 1000 < exposure_dust_limit_success_sats {
3159 let on_holder_tx_dust_htlc_exposure_msat = inbound_stats.on_holder_tx_dust_exposure_msat + outbound_stats.on_holder_tx_dust_exposure_msat + msg.amount_msat;
3160 if on_holder_tx_dust_htlc_exposure_msat > max_dust_htlc_exposure_msat {
3161 log_info!(logger, "Cannot accept value that would put our exposure to dust HTLCs at {} over the limit {} on holder commitment tx",
3162 on_holder_tx_dust_htlc_exposure_msat, max_dust_htlc_exposure_msat);
3163 pending_forward_status = create_pending_htlc_status(self, pending_forward_status, 0x1000|7);
3167 let pending_value_to_self_msat =
3168 self.context.value_to_self_msat + inbound_stats.pending_htlcs_value_msat - removed_outbound_total_msat;
3169 let pending_remote_value_msat =
3170 self.context.channel_value_satoshis * 1000 - pending_value_to_self_msat;
3171 if pending_remote_value_msat < msg.amount_msat {
3172 return Err(ChannelError::Close("Remote HTLC add would overdraw remaining funds".to_owned()));
3175 // Check that the remote can afford to pay for this HTLC on-chain at the current
3176 // feerate_per_kw, while maintaining their channel reserve (as required by the spec).
3178 let remote_commit_tx_fee_msat = if self.context.is_outbound() { 0 } else {
3179 let htlc_candidate = HTLCCandidate::new(msg.amount_msat, HTLCInitiator::RemoteOffered);
3180 self.context.next_remote_commit_tx_fee_msat(htlc_candidate, None) // Don't include the extra fee spike buffer HTLC in calculations
3182 let anchor_outputs_value_msat = if !self.context.is_outbound() && self.context.get_channel_type().supports_anchors_zero_fee_htlc_tx() {
3183 ANCHOR_OUTPUT_VALUE_SATOSHI * 2 * 1000
3187 if pending_remote_value_msat.saturating_sub(msg.amount_msat).saturating_sub(anchor_outputs_value_msat) < remote_commit_tx_fee_msat {
3188 return Err(ChannelError::Close("Remote HTLC add would not leave enough to pay for fees".to_owned()));
3190 if pending_remote_value_msat.saturating_sub(msg.amount_msat).saturating_sub(remote_commit_tx_fee_msat).saturating_sub(anchor_outputs_value_msat) < self.context.holder_selected_channel_reserve_satoshis * 1000 {
3191 return Err(ChannelError::Close("Remote HTLC add would put them under remote reserve value".to_owned()));
3195 let anchor_outputs_value_msat = if self.context.get_channel_type().supports_anchors_zero_fee_htlc_tx() {
3196 ANCHOR_OUTPUT_VALUE_SATOSHI * 2 * 1000
3200 if !self.context.is_outbound() {
3201 // `Some(())` is for the fee spike buffer we keep for the remote. This deviates from
3202 // the spec because the fee spike buffer requirement doesn't exist on the receiver's
3203 // side, only on the sender's. Note that with anchor outputs we are no longer as
3204 // sensitive to fee spikes, so we need to account for them.
3205 let htlc_candidate = HTLCCandidate::new(msg.amount_msat, HTLCInitiator::RemoteOffered);
3206 let mut remote_fee_cost_incl_stuck_buffer_msat = self.context.next_remote_commit_tx_fee_msat(htlc_candidate, Some(()));
3207 if !self.context.get_channel_type().supports_anchors_zero_fee_htlc_tx() {
3208 remote_fee_cost_incl_stuck_buffer_msat *= FEE_SPIKE_BUFFER_FEE_INCREASE_MULTIPLE;
3210 if pending_remote_value_msat.saturating_sub(msg.amount_msat).saturating_sub(self.context.holder_selected_channel_reserve_satoshis * 1000).saturating_sub(anchor_outputs_value_msat) < remote_fee_cost_incl_stuck_buffer_msat {
3211 // Note that if the pending_forward_status is not updated here, then it's because we're already failing
3212 // the HTLC, i.e. its status is already set to failing.
3213 log_info!(logger, "Attempting to fail HTLC due to fee spike buffer violation in channel {}. Rebalancing is required.", &self.context.channel_id());
3214 pending_forward_status = create_pending_htlc_status(self, pending_forward_status, 0x1000|7);
3217 // Check that they won't violate our local required channel reserve by adding this HTLC.
3218 let htlc_candidate = HTLCCandidate::new(msg.amount_msat, HTLCInitiator::RemoteOffered);
3219 let local_commit_tx_fee_msat = self.context.next_local_commit_tx_fee_msat(htlc_candidate, None);
3220 if self.context.value_to_self_msat < self.context.counterparty_selected_channel_reserve_satoshis.unwrap() * 1000 + local_commit_tx_fee_msat + anchor_outputs_value_msat {
3221 return Err(ChannelError::Close("Cannot accept HTLC that would put our balance under counterparty-announced channel reserve value".to_owned()));
3224 if self.context.next_counterparty_htlc_id != msg.htlc_id {
3225 return Err(ChannelError::Close(format!("Remote skipped HTLC ID (skipped ID: {})", self.context.next_counterparty_htlc_id)));
3227 if msg.cltv_expiry >= 500000000 {
3228 return Err(ChannelError::Close("Remote provided CLTV expiry in seconds instead of block height".to_owned()));
3231 if self.context.channel_state.is_local_shutdown_sent() {
3232 if let PendingHTLCStatus::Forward(_) = pending_forward_status {
3233 panic!("ChannelManager shouldn't be trying to add a forwardable HTLC after we've started closing");
3237 // Now update local state:
3238 self.context.next_counterparty_htlc_id += 1;
3239 self.context.pending_inbound_htlcs.push(InboundHTLCOutput {
3240 htlc_id: msg.htlc_id,
3241 amount_msat: msg.amount_msat,
3242 payment_hash: msg.payment_hash,
3243 cltv_expiry: msg.cltv_expiry,
3244 state: InboundHTLCState::RemoteAnnounced(pending_forward_status),
3249 /// Marks an outbound HTLC which we have received update_fail/fulfill/malformed
3251 fn mark_outbound_htlc_removed(&mut self, htlc_id: u64, check_preimage: Option<PaymentPreimage>, fail_reason: Option<HTLCFailReason>) -> Result<&OutboundHTLCOutput, ChannelError> {
3252 assert!(!(check_preimage.is_some() && fail_reason.is_some()), "cannot fail while we have a preimage");
3253 for htlc in self.context.pending_outbound_htlcs.iter_mut() {
3254 if htlc.htlc_id == htlc_id {
3255 let outcome = match check_preimage {
3256 None => fail_reason.into(),
3257 Some(payment_preimage) => {
3258 let payment_hash = PaymentHash(Sha256::hash(&payment_preimage.0[..]).to_byte_array());
3259 if payment_hash != htlc.payment_hash {
3260 return Err(ChannelError::Close(format!("Remote tried to fulfill HTLC ({}) with an incorrect preimage", htlc_id)));
3262 OutboundHTLCOutcome::Success(Some(payment_preimage))
3266 OutboundHTLCState::LocalAnnounced(_) =>
3267 return Err(ChannelError::Close(format!("Remote tried to fulfill/fail HTLC ({}) before it had been committed", htlc_id))),
3268 OutboundHTLCState::Committed => {
3269 htlc.state = OutboundHTLCState::RemoteRemoved(outcome);
3271 OutboundHTLCState::AwaitingRemoteRevokeToRemove(_) | OutboundHTLCState::AwaitingRemovedRemoteRevoke(_) | OutboundHTLCState::RemoteRemoved(_) =>
3272 return Err(ChannelError::Close(format!("Remote tried to fulfill/fail HTLC ({}) that they'd already fulfilled/failed", htlc_id))),
3277 Err(ChannelError::Close("Remote tried to fulfill/fail an HTLC we couldn't find".to_owned()))
3280 pub fn update_fulfill_htlc(&mut self, msg: &msgs::UpdateFulfillHTLC) -> Result<(HTLCSource, u64), ChannelError> {
3281 if !matches!(self.context.channel_state, ChannelState::ChannelReady(_)) {
3282 return Err(ChannelError::Close("Got fulfill HTLC message when channel was not in an operational state".to_owned()));
3284 if self.context.channel_state.is_peer_disconnected() {
3285 return Err(ChannelError::Close("Peer sent update_fulfill_htlc when we needed a channel_reestablish".to_owned()));
3288 self.mark_outbound_htlc_removed(msg.htlc_id, Some(msg.payment_preimage), None).map(|htlc| (htlc.source.clone(), htlc.amount_msat))
3291 pub fn update_fail_htlc(&mut self, msg: &msgs::UpdateFailHTLC, fail_reason: HTLCFailReason) -> Result<(), ChannelError> {
3292 if !matches!(self.context.channel_state, ChannelState::ChannelReady(_)) {
3293 return Err(ChannelError::Close("Got fail HTLC message when channel was not in an operational state".to_owned()));
3295 if self.context.channel_state.is_peer_disconnected() {
3296 return Err(ChannelError::Close("Peer sent update_fail_htlc when we needed a channel_reestablish".to_owned()));
3299 self.mark_outbound_htlc_removed(msg.htlc_id, None, Some(fail_reason))?;
3303 pub fn update_fail_malformed_htlc(&mut self, msg: &msgs::UpdateFailMalformedHTLC, fail_reason: HTLCFailReason) -> Result<(), ChannelError> {
3304 if !matches!(self.context.channel_state, ChannelState::ChannelReady(_)) {
3305 return Err(ChannelError::Close("Got fail malformed HTLC message when channel was not in an operational state".to_owned()));
3307 if self.context.channel_state.is_peer_disconnected() {
3308 return Err(ChannelError::Close("Peer sent update_fail_malformed_htlc when we needed a channel_reestablish".to_owned()));
3311 self.mark_outbound_htlc_removed(msg.htlc_id, None, Some(fail_reason))?;
3315 pub fn commitment_signed<L: Deref>(&mut self, msg: &msgs::CommitmentSigned, logger: &L) -> Result<Option<ChannelMonitorUpdate>, ChannelError>
3316 where L::Target: Logger
3318 if !matches!(self.context.channel_state, ChannelState::ChannelReady(_)) {
3319 return Err(ChannelError::Close("Got commitment signed message when channel was not in an operational state".to_owned()));
3321 if self.context.channel_state.is_peer_disconnected() {
3322 return Err(ChannelError::Close("Peer sent commitment_signed when we needed a channel_reestablish".to_owned()));
3324 if self.context.channel_state.is_both_sides_shutdown() && self.context.last_sent_closing_fee.is_some() {
3325 return Err(ChannelError::Close("Peer sent commitment_signed after we'd started exchanging closing_signeds".to_owned()));
3328 let funding_script = self.context.get_funding_redeemscript();
3330 let keys = self.context.build_holder_transaction_keys(self.context.cur_holder_commitment_transaction_number);
3332 let commitment_stats = self.context.build_commitment_transaction(self.context.cur_holder_commitment_transaction_number, &keys, true, false, logger);
3333 let commitment_txid = {
3334 let trusted_tx = commitment_stats.tx.trust();
3335 let bitcoin_tx = trusted_tx.built_transaction();
3336 let sighash = bitcoin_tx.get_sighash_all(&funding_script, self.context.channel_value_satoshis);
3338 log_trace!(logger, "Checking commitment tx signature {} by key {} against tx {} (sighash {}) with redeemscript {} in channel {}",
3339 log_bytes!(msg.signature.serialize_compact()[..]),
3340 log_bytes!(self.context.counterparty_funding_pubkey().serialize()), encode::serialize_hex(&bitcoin_tx.transaction),
3341 log_bytes!(sighash[..]), encode::serialize_hex(&funding_script), &self.context.channel_id());
3342 if let Err(_) = self.context.secp_ctx.verify_ecdsa(&sighash, &msg.signature, &self.context.counterparty_funding_pubkey()) {
3343 return Err(ChannelError::Close("Invalid commitment tx signature from peer".to_owned()));
3347 let mut htlcs_cloned: Vec<_> = commitment_stats.htlcs_included.iter().map(|htlc| (htlc.0.clone(), htlc.1.map(|h| h.clone()))).collect();
3349 // If our counterparty updated the channel fee in this commitment transaction, check that
3350 // they can actually afford the new fee now.
3351 let update_fee = if let Some((_, update_state)) = self.context.pending_update_fee {
3352 update_state == FeeUpdateState::RemoteAnnounced
3355 debug_assert!(!self.context.is_outbound());
3356 let counterparty_reserve_we_require_msat = self.context.holder_selected_channel_reserve_satoshis * 1000;
3357 if commitment_stats.remote_balance_msat < commitment_stats.total_fee_sat * 1000 + counterparty_reserve_we_require_msat {
3358 return Err(ChannelError::Close("Funding remote cannot afford proposed new fee".to_owned()));
3361 #[cfg(any(test, fuzzing))]
3363 if self.context.is_outbound() {
3364 let projected_commit_tx_info = self.context.next_local_commitment_tx_fee_info_cached.lock().unwrap().take();
3365 *self.context.next_remote_commitment_tx_fee_info_cached.lock().unwrap() = None;
3366 if let Some(info) = projected_commit_tx_info {
3367 let total_pending_htlcs = self.context.pending_inbound_htlcs.len() + self.context.pending_outbound_htlcs.len()
3368 + self.context.holding_cell_htlc_updates.len();
3369 if info.total_pending_htlcs == total_pending_htlcs
3370 && info.next_holder_htlc_id == self.context.next_holder_htlc_id
3371 && info.next_counterparty_htlc_id == self.context.next_counterparty_htlc_id
3372 && info.feerate == self.context.feerate_per_kw {
3373 assert_eq!(commitment_stats.total_fee_sat, info.fee / 1000);
3379 if msg.htlc_signatures.len() != commitment_stats.num_nondust_htlcs {
3380 return Err(ChannelError::Close(format!("Got wrong number of HTLC signatures ({}) from remote. It must be {}", msg.htlc_signatures.len(), commitment_stats.num_nondust_htlcs)));
3383 // Up to LDK 0.0.115, HTLC information was required to be duplicated in the
3384 // `htlcs_and_sigs` vec and in the `holder_commitment_tx` itself, both of which were passed
3385 // in the `ChannelMonitorUpdate`. In 0.0.115, support for having a separate set of
3386 // outbound-non-dust-HTLCSources in the `ChannelMonitorUpdate` was added, however for
3387 // backwards compatibility, we never use it in production. To provide test coverage, here,
3388 // we randomly decide (in test/fuzzing builds) to use the new vec sometimes.
3389 #[allow(unused_assignments, unused_mut)]
3390 let mut separate_nondust_htlc_sources = false;
3391 #[cfg(all(feature = "std", any(test, fuzzing)))] {
3392 use core::hash::{BuildHasher, Hasher};
3393 // Get a random value using the only std API to do so - the DefaultHasher
3394 let rand_val = std::collections::hash_map::RandomState::new().build_hasher().finish();
3395 separate_nondust_htlc_sources = rand_val % 2 == 0;
3398 let mut nondust_htlc_sources = Vec::with_capacity(htlcs_cloned.len());
3399 let mut htlcs_and_sigs = Vec::with_capacity(htlcs_cloned.len());
3400 for (idx, (htlc, mut source_opt)) in htlcs_cloned.drain(..).enumerate() {
3401 if let Some(_) = htlc.transaction_output_index {
3402 let htlc_tx = chan_utils::build_htlc_transaction(&commitment_txid, commitment_stats.feerate_per_kw,
3403 self.context.get_counterparty_selected_contest_delay().unwrap(), &htlc, &self.context.channel_type,
3404 &keys.broadcaster_delayed_payment_key, &keys.revocation_key);
3406 let htlc_redeemscript = chan_utils::get_htlc_redeemscript(&htlc, &self.context.channel_type, &keys);
3407 let htlc_sighashtype = if self.context.channel_type.supports_anchors_zero_fee_htlc_tx() { EcdsaSighashType::SinglePlusAnyoneCanPay } else { EcdsaSighashType::All };
3408 let htlc_sighash = hash_to_message!(&sighash::SighashCache::new(&htlc_tx).segwit_signature_hash(0, &htlc_redeemscript, htlc.amount_msat / 1000, htlc_sighashtype).unwrap()[..]);
3409 log_trace!(logger, "Checking HTLC tx signature {} by key {} against tx {} (sighash {}) with redeemscript {} in channel {}.",
3410 log_bytes!(msg.htlc_signatures[idx].serialize_compact()[..]), log_bytes!(keys.countersignatory_htlc_key.to_public_key().serialize()),
3411 encode::serialize_hex(&htlc_tx), log_bytes!(htlc_sighash[..]), encode::serialize_hex(&htlc_redeemscript), &self.context.channel_id());
3412 if let Err(_) = self.context.secp_ctx.verify_ecdsa(&htlc_sighash, &msg.htlc_signatures[idx], &keys.countersignatory_htlc_key.to_public_key()) {
3413 return Err(ChannelError::Close("Invalid HTLC tx signature from peer".to_owned()));
3415 if !separate_nondust_htlc_sources {
3416 htlcs_and_sigs.push((htlc, Some(msg.htlc_signatures[idx]), source_opt.take()));
3419 htlcs_and_sigs.push((htlc, None, source_opt.take()));
3421 if separate_nondust_htlc_sources {
3422 if let Some(source) = source_opt.take() {
3423 nondust_htlc_sources.push(source);
3426 debug_assert!(source_opt.is_none(), "HTLCSource should have been put somewhere");
3429 let holder_commitment_tx = HolderCommitmentTransaction::new(
3430 commitment_stats.tx,
3432 msg.htlc_signatures.clone(),
3433 &self.context.get_holder_pubkeys().funding_pubkey,
3434 self.context.counterparty_funding_pubkey()
3437 self.context.holder_signer.as_ref().validate_holder_commitment(&holder_commitment_tx, commitment_stats.outbound_htlc_preimages)
3438 .map_err(|_| ChannelError::Close("Failed to validate our commitment".to_owned()))?;
3440 // Update state now that we've passed all the can-fail calls...
3441 let mut need_commitment = false;
3442 if let &mut Some((_, ref mut update_state)) = &mut self.context.pending_update_fee {
3443 if *update_state == FeeUpdateState::RemoteAnnounced {
3444 *update_state = FeeUpdateState::AwaitingRemoteRevokeToAnnounce;
3445 need_commitment = true;
3449 for htlc in self.context.pending_inbound_htlcs.iter_mut() {
3450 let new_forward = if let &InboundHTLCState::RemoteAnnounced(ref forward_info) = &htlc.state {
3451 Some(forward_info.clone())
3453 if let Some(forward_info) = new_forward {
3454 log_trace!(logger, "Updating HTLC {} to AwaitingRemoteRevokeToAnnounce due to commitment_signed in channel {}.",
3455 &htlc.payment_hash, &self.context.channel_id);
3456 htlc.state = InboundHTLCState::AwaitingRemoteRevokeToAnnounce(forward_info);
3457 need_commitment = true;
3460 let mut claimed_htlcs = Vec::new();
3461 for htlc in self.context.pending_outbound_htlcs.iter_mut() {
3462 if let &mut OutboundHTLCState::RemoteRemoved(ref mut outcome) = &mut htlc.state {
3463 log_trace!(logger, "Updating HTLC {} to AwaitingRemoteRevokeToRemove due to commitment_signed in channel {}.",
3464 &htlc.payment_hash, &self.context.channel_id);
3465 // Grab the preimage, if it exists, instead of cloning
3466 let mut reason = OutboundHTLCOutcome::Success(None);
3467 mem::swap(outcome, &mut reason);
3468 if let OutboundHTLCOutcome::Success(Some(preimage)) = reason {
3469 // If a user (a) receives an HTLC claim using LDK 0.0.104 or before, then (b)
3470 // upgrades to LDK 0.0.114 or later before the HTLC is fully resolved, we could
3471 // have a `Success(None)` reason. In this case we could forget some HTLC
3472 // claims, but such an upgrade is unlikely and including claimed HTLCs here
3473 // fixes a bug which the user was exposed to on 0.0.104 when they started the
3475 claimed_htlcs.push((SentHTLCId::from_source(&htlc.source), preimage));
3477 htlc.state = OutboundHTLCState::AwaitingRemoteRevokeToRemove(reason);
3478 need_commitment = true;
3482 self.context.latest_monitor_update_id += 1;
3483 let mut monitor_update = ChannelMonitorUpdate {
3484 update_id: self.context.latest_monitor_update_id,
3485 updates: vec![ChannelMonitorUpdateStep::LatestHolderCommitmentTXInfo {
3486 commitment_tx: holder_commitment_tx,
3487 htlc_outputs: htlcs_and_sigs,
3489 nondust_htlc_sources,
3493 self.context.cur_holder_commitment_transaction_number -= 1;
3494 self.context.expecting_peer_commitment_signed = false;
3495 // Note that if we need_commitment & !AwaitingRemoteRevoke we'll call
3496 // build_commitment_no_status_check() next which will reset this to RAAFirst.
3497 self.context.resend_order = RAACommitmentOrder::CommitmentFirst;
3499 if self.context.channel_state.is_monitor_update_in_progress() {
3500 // In case we initially failed monitor updating without requiring a response, we need
3501 // to make sure the RAA gets sent first.
3502 self.context.monitor_pending_revoke_and_ack = true;
3503 if need_commitment && !self.context.channel_state.is_awaiting_remote_revoke() {
3504 // If we were going to send a commitment_signed after the RAA, go ahead and do all
3505 // the corresponding HTLC status updates so that
3506 // get_last_commitment_update_for_send includes the right HTLCs.
3507 self.context.monitor_pending_commitment_signed = true;
3508 let mut additional_update = self.build_commitment_no_status_check(logger);
3509 // build_commitment_no_status_check may bump latest_monitor_id but we want them to be
3510 // strictly increasing by one, so decrement it here.
3511 self.context.latest_monitor_update_id = monitor_update.update_id;
3512 monitor_update.updates.append(&mut additional_update.updates);
3514 log_debug!(logger, "Received valid commitment_signed from peer in channel {}, updated HTLC state but awaiting a monitor update resolution to reply.",
3515 &self.context.channel_id);
3516 return Ok(self.push_ret_blockable_mon_update(monitor_update));
3519 let need_commitment_signed = if need_commitment && !self.context.channel_state.is_awaiting_remote_revoke() {
3520 // If we're AwaitingRemoteRevoke we can't send a new commitment here, but that's ok -
3521 // we'll send one right away when we get the revoke_and_ack when we
3522 // free_holding_cell_htlcs().
3523 let mut additional_update = self.build_commitment_no_status_check(logger);
3524 // build_commitment_no_status_check may bump latest_monitor_id but we want them to be
3525 // strictly increasing by one, so decrement it here.
3526 self.context.latest_monitor_update_id = monitor_update.update_id;
3527 monitor_update.updates.append(&mut additional_update.updates);
3531 log_debug!(logger, "Received valid commitment_signed from peer in channel {}, updating HTLC state and responding with{} a revoke_and_ack.",
3532 &self.context.channel_id(), if need_commitment_signed { " our own commitment_signed and" } else { "" });
3533 self.monitor_updating_paused(true, need_commitment_signed, false, Vec::new(), Vec::new(), Vec::new());
3534 return Ok(self.push_ret_blockable_mon_update(monitor_update));
3537 /// Public version of the below, checking relevant preconditions first.
3538 /// If we're not in a state where freeing the holding cell makes sense, this is a no-op and
3539 /// returns `(None, Vec::new())`.
3540 pub fn maybe_free_holding_cell_htlcs<F: Deref, L: Deref>(
3541 &mut self, fee_estimator: &LowerBoundedFeeEstimator<F>, logger: &L
3542 ) -> (Option<ChannelMonitorUpdate>, Vec<(HTLCSource, PaymentHash)>)
3543 where F::Target: FeeEstimator, L::Target: Logger
3545 if matches!(self.context.channel_state, ChannelState::ChannelReady(_)) && !self.context.channel_state.should_force_holding_cell() {
3546 self.free_holding_cell_htlcs(fee_estimator, logger)
3547 } else { (None, Vec::new()) }
3550 /// Frees any pending commitment updates in the holding cell, generating the relevant messages
3551 /// for our counterparty.
3552 fn free_holding_cell_htlcs<F: Deref, L: Deref>(
3553 &mut self, fee_estimator: &LowerBoundedFeeEstimator<F>, logger: &L
3554 ) -> (Option<ChannelMonitorUpdate>, Vec<(HTLCSource, PaymentHash)>)
3555 where F::Target: FeeEstimator, L::Target: Logger
3557 assert!(!self.context.channel_state.is_monitor_update_in_progress());
3558 if self.context.holding_cell_htlc_updates.len() != 0 || self.context.holding_cell_update_fee.is_some() {
3559 log_trace!(logger, "Freeing holding cell with {} HTLC updates{} in channel {}", self.context.holding_cell_htlc_updates.len(),
3560 if self.context.holding_cell_update_fee.is_some() { " and a fee update" } else { "" }, &self.context.channel_id());
3562 let mut monitor_update = ChannelMonitorUpdate {
3563 update_id: self.context.latest_monitor_update_id + 1, // We don't increment this yet!
3564 updates: Vec::new(),
3567 let mut htlc_updates = Vec::new();
3568 mem::swap(&mut htlc_updates, &mut self.context.holding_cell_htlc_updates);
3569 let mut update_add_count = 0;
3570 let mut update_fulfill_count = 0;
3571 let mut update_fail_count = 0;
3572 let mut htlcs_to_fail = Vec::new();
3573 for htlc_update in htlc_updates.drain(..) {
3574 // Note that this *can* fail, though it should be due to rather-rare conditions on
3575 // fee races with adding too many outputs which push our total payments just over
3576 // the limit. In case it's less rare than I anticipate, we may want to revisit
3577 // handling this case better and maybe fulfilling some of the HTLCs while attempting
3578 // to rebalance channels.
3579 let fail_htlc_res = match &htlc_update {
3580 &HTLCUpdateAwaitingACK::AddHTLC {
3581 amount_msat, cltv_expiry, ref payment_hash, ref source, ref onion_routing_packet,
3582 skimmed_fee_msat, blinding_point, ..
3584 match self.send_htlc(
3585 amount_msat, *payment_hash, cltv_expiry, source.clone(), onion_routing_packet.clone(),
3586 false, skimmed_fee_msat, blinding_point, fee_estimator, logger
3588 Ok(_) => update_add_count += 1,
3591 ChannelError::Ignore(ref msg) => {
3592 log_info!(logger, "Failed to send HTLC with payment_hash {} due to {} in channel {}", &payment_hash, msg, &self.context.channel_id());
3593 // If we fail to send here, then this HTLC should
3594 // be failed backwards. Failing to send here
3595 // indicates that this HTLC may keep being put back
3596 // into the holding cell without ever being
3597 // successfully forwarded/failed/fulfilled, causing
3598 // our counterparty to eventually close on us.
3599 htlcs_to_fail.push((source.clone(), *payment_hash));
3602 panic!("Got a non-IgnoreError action trying to send holding cell HTLC");
3609 &HTLCUpdateAwaitingACK::ClaimHTLC { ref payment_preimage, htlc_id, .. } => {
3610 // If an HTLC claim was previously added to the holding cell (via
3611 // `get_update_fulfill_htlc`, then generating the claim message itself must
3612 // not fail - any in between attempts to claim the HTLC will have resulted
3613 // in it hitting the holding cell again and we cannot change the state of a
3614 // holding cell HTLC from fulfill to anything else.
3615 let mut additional_monitor_update =
3616 if let UpdateFulfillFetch::NewClaim { monitor_update, .. } =
3617 self.get_update_fulfill_htlc(htlc_id, *payment_preimage, logger)
3618 { monitor_update } else { unreachable!() };
3619 update_fulfill_count += 1;
3620 monitor_update.updates.append(&mut additional_monitor_update.updates);
3623 &HTLCUpdateAwaitingACK::FailHTLC { htlc_id, ref err_packet } => {
3624 Some(self.fail_htlc(htlc_id, err_packet.clone(), false, logger)
3625 .map(|fail_msg_opt| fail_msg_opt.map(|_| ())))
3627 &HTLCUpdateAwaitingACK::FailMalformedHTLC { htlc_id, failure_code, sha256_of_onion } => {
3628 Some(self.fail_htlc(htlc_id, (failure_code, sha256_of_onion), false, logger)
3629 .map(|fail_msg_opt| fail_msg_opt.map(|_| ())))
3632 match fail_htlc_res {
3633 Some(Ok(fail_msg_opt)) => {
3634 // If an HTLC failure was previously added to the holding cell (via
3635 // `queue_fail_{malformed_}htlc`) then generating the fail message itself must
3636 // not fail - we should never end up in a state where we double-fail
3637 // an HTLC or fail-then-claim an HTLC as it indicates we didn't wait
3638 // for a full revocation before failing.
3639 debug_assert!(fail_msg_opt.is_some());
3640 update_fail_count += 1;
3643 if let ChannelError::Ignore(_) = e {}
3645 panic!("Got a non-IgnoreError action trying to fail holding cell HTLC");
3651 if update_add_count == 0 && update_fulfill_count == 0 && update_fail_count == 0 && self.context.holding_cell_update_fee.is_none() {
3652 return (None, htlcs_to_fail);
3654 let update_fee = if let Some(feerate) = self.context.holding_cell_update_fee.take() {
3655 self.send_update_fee(feerate, false, fee_estimator, logger)
3660 let mut additional_update = self.build_commitment_no_status_check(logger);
3661 // build_commitment_no_status_check and get_update_fulfill_htlc may bump latest_monitor_id
3662 // but we want them to be strictly increasing by one, so reset it here.
3663 self.context.latest_monitor_update_id = monitor_update.update_id;
3664 monitor_update.updates.append(&mut additional_update.updates);
3666 log_debug!(logger, "Freeing holding cell in channel {} resulted in {}{} HTLCs added, {} HTLCs fulfilled, and {} HTLCs failed.",
3667 &self.context.channel_id(), if update_fee.is_some() { "a fee update, " } else { "" },
3668 update_add_count, update_fulfill_count, update_fail_count);
3670 self.monitor_updating_paused(false, true, false, Vec::new(), Vec::new(), Vec::new());
3671 (self.push_ret_blockable_mon_update(monitor_update), htlcs_to_fail)
3677 /// Handles receiving a remote's revoke_and_ack. Note that we may return a new
3678 /// commitment_signed message here in case we had pending outbound HTLCs to add which were
3679 /// waiting on this revoke_and_ack. The generation of this new commitment_signed may also fail,
3680 /// generating an appropriate error *after* the channel state has been updated based on the
3681 /// revoke_and_ack message.
3682 pub fn revoke_and_ack<F: Deref, L: Deref>(&mut self, msg: &msgs::RevokeAndACK,
3683 fee_estimator: &LowerBoundedFeeEstimator<F>, logger: &L, hold_mon_update: bool,
3684 ) -> Result<(Vec<(HTLCSource, PaymentHash)>, Option<ChannelMonitorUpdate>), ChannelError>
3685 where F::Target: FeeEstimator, L::Target: Logger,
3687 if !matches!(self.context.channel_state, ChannelState::ChannelReady(_)) {
3688 return Err(ChannelError::Close("Got revoke/ACK message when channel was not in an operational state".to_owned()));
3690 if self.context.channel_state.is_peer_disconnected() {
3691 return Err(ChannelError::Close("Peer sent revoke_and_ack when we needed a channel_reestablish".to_owned()));
3693 if self.context.channel_state.is_both_sides_shutdown() && self.context.last_sent_closing_fee.is_some() {
3694 return Err(ChannelError::Close("Peer sent revoke_and_ack after we'd started exchanging closing_signeds".to_owned()));
3697 let secret = secp_check!(SecretKey::from_slice(&msg.per_commitment_secret), "Peer provided an invalid per_commitment_secret".to_owned());
3699 if let Some(counterparty_prev_commitment_point) = self.context.counterparty_prev_commitment_point {
3700 if PublicKey::from_secret_key(&self.context.secp_ctx, &secret) != counterparty_prev_commitment_point {
3701 return Err(ChannelError::Close("Got a revoke commitment secret which didn't correspond to their current pubkey".to_owned()));
3705 if !self.context.channel_state.is_awaiting_remote_revoke() {
3706 // Our counterparty seems to have burned their coins to us (by revoking a state when we
3707 // haven't given them a new commitment transaction to broadcast). We should probably
3708 // take advantage of this by updating our channel monitor, sending them an error, and
3709 // waiting for them to broadcast their latest (now-revoked claim). But, that would be a
3710 // lot of work, and there's some chance this is all a misunderstanding anyway.
3711 // We have to do *something*, though, since our signer may get mad at us for otherwise
3712 // jumping a remote commitment number, so best to just force-close and move on.
3713 return Err(ChannelError::Close("Received an unexpected revoke_and_ack".to_owned()));
3716 #[cfg(any(test, fuzzing))]
3718 *self.context.next_local_commitment_tx_fee_info_cached.lock().unwrap() = None;
3719 *self.context.next_remote_commitment_tx_fee_info_cached.lock().unwrap() = None;
3722 match &self.context.holder_signer {
3723 ChannelSignerType::Ecdsa(ecdsa) => {
3724 ecdsa.validate_counterparty_revocation(
3725 self.context.cur_counterparty_commitment_transaction_number + 1,
3727 ).map_err(|_| ChannelError::Close("Failed to validate revocation from peer".to_owned()))?;
3729 // TODO (taproot|arik)
3734 self.context.commitment_secrets.provide_secret(self.context.cur_counterparty_commitment_transaction_number + 1, msg.per_commitment_secret)
3735 .map_err(|_| ChannelError::Close("Previous secrets did not match new one".to_owned()))?;
3736 self.context.latest_monitor_update_id += 1;
3737 let mut monitor_update = ChannelMonitorUpdate {
3738 update_id: self.context.latest_monitor_update_id,
3739 updates: vec![ChannelMonitorUpdateStep::CommitmentSecret {
3740 idx: self.context.cur_counterparty_commitment_transaction_number + 1,
3741 secret: msg.per_commitment_secret,
3745 // Update state now that we've passed all the can-fail calls...
3746 // (note that we may still fail to generate the new commitment_signed message, but that's
3747 // OK, we step the channel here and *then* if the new generation fails we can fail the
3748 // channel based on that, but stepping stuff here should be safe either way.
3749 self.context.channel_state.clear_awaiting_remote_revoke();
3750 self.context.sent_message_awaiting_response = None;
3751 self.context.counterparty_prev_commitment_point = self.context.counterparty_cur_commitment_point;
3752 self.context.counterparty_cur_commitment_point = Some(msg.next_per_commitment_point);
3753 self.context.cur_counterparty_commitment_transaction_number -= 1;
3755 if self.context.announcement_sigs_state == AnnouncementSigsState::Committed {
3756 self.context.announcement_sigs_state = AnnouncementSigsState::PeerReceived;
3759 log_trace!(logger, "Updating HTLCs on receipt of RAA in channel {}...", &self.context.channel_id());
3760 let mut to_forward_infos = Vec::new();
3761 let mut revoked_htlcs = Vec::new();
3762 let mut finalized_claimed_htlcs = Vec::new();
3763 let mut update_fail_htlcs = Vec::new();
3764 let mut update_fail_malformed_htlcs = Vec::new();
3765 let mut require_commitment = false;
3766 let mut value_to_self_msat_diff: i64 = 0;
3769 // Take references explicitly so that we can hold multiple references to self.context.
3770 let pending_inbound_htlcs: &mut Vec<_> = &mut self.context.pending_inbound_htlcs;
3771 let pending_outbound_htlcs: &mut Vec<_> = &mut self.context.pending_outbound_htlcs;
3772 let expecting_peer_commitment_signed = &mut self.context.expecting_peer_commitment_signed;
3774 // We really shouldnt have two passes here, but retain gives a non-mutable ref (Rust bug)
3775 pending_inbound_htlcs.retain(|htlc| {
3776 if let &InboundHTLCState::LocalRemoved(ref reason) = &htlc.state {
3777 log_trace!(logger, " ...removing inbound LocalRemoved {}", &htlc.payment_hash);
3778 if let &InboundHTLCRemovalReason::Fulfill(_) = reason {
3779 value_to_self_msat_diff += htlc.amount_msat as i64;
3781 *expecting_peer_commitment_signed = true;
3785 pending_outbound_htlcs.retain(|htlc| {
3786 if let &OutboundHTLCState::AwaitingRemovedRemoteRevoke(ref outcome) = &htlc.state {
3787 log_trace!(logger, " ...removing outbound AwaitingRemovedRemoteRevoke {}", &htlc.payment_hash);
3788 if let OutboundHTLCOutcome::Failure(reason) = outcome.clone() { // We really want take() here, but, again, non-mut ref :(
3789 revoked_htlcs.push((htlc.source.clone(), htlc.payment_hash, reason));
3791 finalized_claimed_htlcs.push(htlc.source.clone());
3792 // They fulfilled, so we sent them money
3793 value_to_self_msat_diff -= htlc.amount_msat as i64;
3798 for htlc in pending_inbound_htlcs.iter_mut() {
3799 let swap = if let &InboundHTLCState::AwaitingRemoteRevokeToAnnounce(_) = &htlc.state {
3801 } else if let &InboundHTLCState::AwaitingAnnouncedRemoteRevoke(_) = &htlc.state {
3805 let mut state = InboundHTLCState::Committed;
3806 mem::swap(&mut state, &mut htlc.state);
3808 if let InboundHTLCState::AwaitingRemoteRevokeToAnnounce(forward_info) = state {
3809 log_trace!(logger, " ...promoting inbound AwaitingRemoteRevokeToAnnounce {} to AwaitingAnnouncedRemoteRevoke", &htlc.payment_hash);
3810 htlc.state = InboundHTLCState::AwaitingAnnouncedRemoteRevoke(forward_info);
3811 require_commitment = true;
3812 } else if let InboundHTLCState::AwaitingAnnouncedRemoteRevoke(forward_info) = state {
3813 match forward_info {
3814 PendingHTLCStatus::Fail(fail_msg) => {
3815 log_trace!(logger, " ...promoting inbound AwaitingAnnouncedRemoteRevoke {} to LocalRemoved due to PendingHTLCStatus indicating failure", &htlc.payment_hash);
3816 require_commitment = true;
3818 HTLCFailureMsg::Relay(msg) => {
3819 htlc.state = InboundHTLCState::LocalRemoved(InboundHTLCRemovalReason::FailRelay(msg.reason.clone()));
3820 update_fail_htlcs.push(msg)
3822 HTLCFailureMsg::Malformed(msg) => {
3823 htlc.state = InboundHTLCState::LocalRemoved(InboundHTLCRemovalReason::FailMalformed((msg.sha256_of_onion, msg.failure_code)));
3824 update_fail_malformed_htlcs.push(msg)
3828 PendingHTLCStatus::Forward(forward_info) => {
3829 log_trace!(logger, " ...promoting inbound AwaitingAnnouncedRemoteRevoke {} to Committed", &htlc.payment_hash);
3830 to_forward_infos.push((forward_info, htlc.htlc_id));
3831 htlc.state = InboundHTLCState::Committed;
3837 for htlc in pending_outbound_htlcs.iter_mut() {
3838 if let OutboundHTLCState::LocalAnnounced(_) = htlc.state {
3839 log_trace!(logger, " ...promoting outbound LocalAnnounced {} to Committed", &htlc.payment_hash);
3840 htlc.state = OutboundHTLCState::Committed;
3841 *expecting_peer_commitment_signed = true;
3843 if let &mut OutboundHTLCState::AwaitingRemoteRevokeToRemove(ref mut outcome) = &mut htlc.state {
3844 log_trace!(logger, " ...promoting outbound AwaitingRemoteRevokeToRemove {} to AwaitingRemovedRemoteRevoke", &htlc.payment_hash);
3845 // Grab the preimage, if it exists, instead of cloning
3846 let mut reason = OutboundHTLCOutcome::Success(None);
3847 mem::swap(outcome, &mut reason);
3848 htlc.state = OutboundHTLCState::AwaitingRemovedRemoteRevoke(reason);
3849 require_commitment = true;
3853 self.context.value_to_self_msat = (self.context.value_to_self_msat as i64 + value_to_self_msat_diff) as u64;
3855 if let Some((feerate, update_state)) = self.context.pending_update_fee {
3856 match update_state {
3857 FeeUpdateState::Outbound => {
3858 debug_assert!(self.context.is_outbound());
3859 log_trace!(logger, " ...promoting outbound fee update {} to Committed", feerate);
3860 self.context.feerate_per_kw = feerate;
3861 self.context.pending_update_fee = None;
3862 self.context.expecting_peer_commitment_signed = true;
3864 FeeUpdateState::RemoteAnnounced => { debug_assert!(!self.context.is_outbound()); },
3865 FeeUpdateState::AwaitingRemoteRevokeToAnnounce => {
3866 debug_assert!(!self.context.is_outbound());
3867 log_trace!(logger, " ...promoting inbound AwaitingRemoteRevokeToAnnounce fee update {} to Committed", feerate);
3868 require_commitment = true;
3869 self.context.feerate_per_kw = feerate;
3870 self.context.pending_update_fee = None;
3875 let release_monitor = self.context.blocked_monitor_updates.is_empty() && !hold_mon_update;
3876 let release_state_str =
3877 if hold_mon_update { "Holding" } else if release_monitor { "Releasing" } else { "Blocked" };
3878 macro_rules! return_with_htlcs_to_fail {
3879 ($htlcs_to_fail: expr) => {
3880 if !release_monitor {
3881 self.context.blocked_monitor_updates.push(PendingChannelMonitorUpdate {
3882 update: monitor_update,
3884 return Ok(($htlcs_to_fail, None));
3886 return Ok(($htlcs_to_fail, Some(monitor_update)));
3891 if self.context.channel_state.is_monitor_update_in_progress() {
3892 // We can't actually generate a new commitment transaction (incl by freeing holding
3893 // cells) while we can't update the monitor, so we just return what we have.
3894 if require_commitment {
3895 self.context.monitor_pending_commitment_signed = true;
3896 // When the monitor updating is restored we'll call
3897 // get_last_commitment_update_for_send(), which does not update state, but we're
3898 // definitely now awaiting a remote revoke before we can step forward any more, so
3900 let mut additional_update = self.build_commitment_no_status_check(logger);
3901 // build_commitment_no_status_check may bump latest_monitor_id but we want them to be
3902 // strictly increasing by one, so decrement it here.
3903 self.context.latest_monitor_update_id = monitor_update.update_id;
3904 monitor_update.updates.append(&mut additional_update.updates);
3906 self.context.monitor_pending_forwards.append(&mut to_forward_infos);
3907 self.context.monitor_pending_failures.append(&mut revoked_htlcs);
3908 self.context.monitor_pending_finalized_fulfills.append(&mut finalized_claimed_htlcs);
3909 log_debug!(logger, "Received a valid revoke_and_ack for channel {} but awaiting a monitor update resolution to reply.", &self.context.channel_id());
3910 return_with_htlcs_to_fail!(Vec::new());
3913 match self.free_holding_cell_htlcs(fee_estimator, logger) {
3914 (Some(mut additional_update), htlcs_to_fail) => {
3915 // free_holding_cell_htlcs may bump latest_monitor_id multiple times but we want them to be
3916 // strictly increasing by one, so decrement it here.
3917 self.context.latest_monitor_update_id = monitor_update.update_id;
3918 monitor_update.updates.append(&mut additional_update.updates);
3920 log_debug!(logger, "Received a valid revoke_and_ack for channel {} with holding cell HTLCs freed. {} monitor update.",
3921 &self.context.channel_id(), release_state_str);
3923 self.monitor_updating_paused(false, true, false, to_forward_infos, revoked_htlcs, finalized_claimed_htlcs);
3924 return_with_htlcs_to_fail!(htlcs_to_fail);
3926 (None, htlcs_to_fail) => {
3927 if require_commitment {
3928 let mut additional_update = self.build_commitment_no_status_check(logger);
3930 // build_commitment_no_status_check may bump latest_monitor_id but we want them to be
3931 // strictly increasing by one, so decrement it here.
3932 self.context.latest_monitor_update_id = monitor_update.update_id;
3933 monitor_update.updates.append(&mut additional_update.updates);
3935 log_debug!(logger, "Received a valid revoke_and_ack for channel {}. Responding with a commitment update with {} HTLCs failed. {} monitor update.",
3936 &self.context.channel_id(),
3937 update_fail_htlcs.len() + update_fail_malformed_htlcs.len(),
3940 self.monitor_updating_paused(false, true, false, to_forward_infos, revoked_htlcs, finalized_claimed_htlcs);
3941 return_with_htlcs_to_fail!(htlcs_to_fail);
3943 log_debug!(logger, "Received a valid revoke_and_ack for channel {} with no reply necessary. {} monitor update.",
3944 &self.context.channel_id(), release_state_str);
3946 self.monitor_updating_paused(false, false, false, to_forward_infos, revoked_htlcs, finalized_claimed_htlcs);
3947 return_with_htlcs_to_fail!(htlcs_to_fail);
3953 /// Queues up an outbound update fee by placing it in the holding cell. You should call
3954 /// [`Self::maybe_free_holding_cell_htlcs`] in order to actually generate and send the
3955 /// commitment update.
3956 pub fn queue_update_fee<F: Deref, L: Deref>(&mut self, feerate_per_kw: u32,
3957 fee_estimator: &LowerBoundedFeeEstimator<F>, logger: &L)
3958 where F::Target: FeeEstimator, L::Target: Logger
3960 let msg_opt = self.send_update_fee(feerate_per_kw, true, fee_estimator, logger);
3961 assert!(msg_opt.is_none(), "We forced holding cell?");
3964 /// Adds a pending update to this channel. See the doc for send_htlc for
3965 /// further details on the optionness of the return value.
3966 /// If our balance is too low to cover the cost of the next commitment transaction at the
3967 /// new feerate, the update is cancelled.
3969 /// You MUST call [`Self::send_commitment_no_state_update`] prior to any other calls on this
3970 /// [`Channel`] if `force_holding_cell` is false.
3971 fn send_update_fee<F: Deref, L: Deref>(
3972 &mut self, feerate_per_kw: u32, mut force_holding_cell: bool,
3973 fee_estimator: &LowerBoundedFeeEstimator<F>, logger: &L
3974 ) -> Option<msgs::UpdateFee>
3975 where F::Target: FeeEstimator, L::Target: Logger
3977 if !self.context.is_outbound() {
3978 panic!("Cannot send fee from inbound channel");
3980 if !self.context.is_usable() {
3981 panic!("Cannot update fee until channel is fully established and we haven't started shutting down");
3983 if !self.context.is_live() {
3984 panic!("Cannot update fee while peer is disconnected/we're awaiting a monitor update (ChannelManager should have caught this)");
3987 // Before proposing a feerate update, check that we can actually afford the new fee.
3988 let inbound_stats = self.context.get_inbound_pending_htlc_stats(Some(feerate_per_kw));
3989 let outbound_stats = self.context.get_outbound_pending_htlc_stats(Some(feerate_per_kw));
3990 let keys = self.context.build_holder_transaction_keys(self.context.cur_holder_commitment_transaction_number);
3991 let commitment_stats = self.context.build_commitment_transaction(self.context.cur_holder_commitment_transaction_number, &keys, true, true, logger);
3992 let buffer_fee_msat = commit_tx_fee_sat(feerate_per_kw, commitment_stats.num_nondust_htlcs + outbound_stats.on_holder_tx_holding_cell_htlcs_count as usize + CONCURRENT_INBOUND_HTLC_FEE_BUFFER as usize, self.context.get_channel_type()) * 1000;
3993 let holder_balance_msat = commitment_stats.local_balance_msat - outbound_stats.holding_cell_msat;
3994 if holder_balance_msat < buffer_fee_msat + self.context.counterparty_selected_channel_reserve_satoshis.unwrap() * 1000 {
3995 //TODO: auto-close after a number of failures?
3996 log_debug!(logger, "Cannot afford to send new feerate at {}", feerate_per_kw);
4000 // Note, we evaluate pending htlc "preemptive" trimmed-to-dust threshold at the proposed `feerate_per_kw`.
4001 let holder_tx_dust_exposure = inbound_stats.on_holder_tx_dust_exposure_msat + outbound_stats.on_holder_tx_dust_exposure_msat;
4002 let counterparty_tx_dust_exposure = inbound_stats.on_counterparty_tx_dust_exposure_msat + outbound_stats.on_counterparty_tx_dust_exposure_msat;
4003 let max_dust_htlc_exposure_msat = self.context.get_max_dust_htlc_exposure_msat(fee_estimator);
4004 if holder_tx_dust_exposure > max_dust_htlc_exposure_msat {
4005 log_debug!(logger, "Cannot afford to send new feerate at {} without infringing max dust htlc exposure", feerate_per_kw);
4008 if counterparty_tx_dust_exposure > max_dust_htlc_exposure_msat {
4009 log_debug!(logger, "Cannot afford to send new feerate at {} without infringing max dust htlc exposure", feerate_per_kw);
4013 if self.context.channel_state.is_awaiting_remote_revoke() || self.context.channel_state.is_monitor_update_in_progress() {
4014 force_holding_cell = true;
4017 if force_holding_cell {
4018 self.context.holding_cell_update_fee = Some(feerate_per_kw);
4022 debug_assert!(self.context.pending_update_fee.is_none());
4023 self.context.pending_update_fee = Some((feerate_per_kw, FeeUpdateState::Outbound));
4025 Some(msgs::UpdateFee {
4026 channel_id: self.context.channel_id,
4031 /// Removes any uncommitted inbound HTLCs and resets the state of uncommitted outbound HTLC
4032 /// updates, to be used on peer disconnection. After this, update_*_htlc messages need to be
4034 /// No further message handling calls may be made until a channel_reestablish dance has
4036 /// May return `Err(())`, which implies [`ChannelContext::force_shutdown`] should be called immediately.
4037 pub fn remove_uncommitted_htlcs_and_mark_paused<L: Deref>(&mut self, logger: &L) -> Result<(), ()> where L::Target: Logger {
4038 assert!(!matches!(self.context.channel_state, ChannelState::ShutdownComplete));
4039 if self.context.channel_state.is_pre_funded_state() {
4043 if self.context.channel_state.is_peer_disconnected() {
4044 // While the below code should be idempotent, it's simpler to just return early, as
4045 // redundant disconnect events can fire, though they should be rare.
4049 if self.context.announcement_sigs_state == AnnouncementSigsState::MessageSent || self.context.announcement_sigs_state == AnnouncementSigsState::Committed {
4050 self.context.announcement_sigs_state = AnnouncementSigsState::NotSent;
4053 // Upon reconnect we have to start the closing_signed dance over, but shutdown messages
4054 // will be retransmitted.
4055 self.context.last_sent_closing_fee = None;
4056 self.context.pending_counterparty_closing_signed = None;
4057 self.context.closing_fee_limits = None;
4059 let mut inbound_drop_count = 0;
4060 self.context.pending_inbound_htlcs.retain(|htlc| {
4062 InboundHTLCState::RemoteAnnounced(_) => {
4063 // They sent us an update_add_htlc but we never got the commitment_signed.
4064 // We'll tell them what commitment_signed we're expecting next and they'll drop
4065 // this HTLC accordingly
4066 inbound_drop_count += 1;
4069 InboundHTLCState::AwaitingRemoteRevokeToAnnounce(_)|InboundHTLCState::AwaitingAnnouncedRemoteRevoke(_) => {
4070 // We received a commitment_signed updating this HTLC and (at least hopefully)
4071 // sent a revoke_and_ack (which we can re-transmit) and have heard nothing
4072 // in response to it yet, so don't touch it.
4075 InboundHTLCState::Committed => true,
4076 InboundHTLCState::LocalRemoved(_) => {
4077 // We (hopefully) sent a commitment_signed updating this HTLC (which we can
4078 // re-transmit if needed) and they may have even sent a revoke_and_ack back
4079 // (that we missed). Keep this around for now and if they tell us they missed
4080 // the commitment_signed we can re-transmit the update then.
4085 self.context.next_counterparty_htlc_id -= inbound_drop_count;
4087 if let Some((_, update_state)) = self.context.pending_update_fee {
4088 if update_state == FeeUpdateState::RemoteAnnounced {
4089 debug_assert!(!self.context.is_outbound());
4090 self.context.pending_update_fee = None;
4094 for htlc in self.context.pending_outbound_htlcs.iter_mut() {
4095 if let OutboundHTLCState::RemoteRemoved(_) = htlc.state {
4096 // They sent us an update to remove this but haven't yet sent the corresponding
4097 // commitment_signed, we need to move it back to Committed and they can re-send
4098 // the update upon reconnection.
4099 htlc.state = OutboundHTLCState::Committed;
4103 self.context.sent_message_awaiting_response = None;
4105 self.context.channel_state.set_peer_disconnected();
4106 log_trace!(logger, "Peer disconnection resulted in {} remote-announced HTLC drops on channel {}", inbound_drop_count, &self.context.channel_id());
4110 /// Indicates that a ChannelMonitor update is in progress and has not yet been fully persisted.
4111 /// This must be called before we return the [`ChannelMonitorUpdate`] back to the
4112 /// [`ChannelManager`], which will call [`Self::monitor_updating_restored`] once the monitor
4113 /// update completes (potentially immediately).
4114 /// The messages which were generated with the monitor update must *not* have been sent to the
4115 /// remote end, and must instead have been dropped. They will be regenerated when
4116 /// [`Self::monitor_updating_restored`] is called.
4118 /// [`ChannelManager`]: super::channelmanager::ChannelManager
4119 /// [`chain::Watch`]: crate::chain::Watch
4120 /// [`ChannelMonitorUpdateStatus::InProgress`]: crate::chain::ChannelMonitorUpdateStatus::InProgress
4121 fn monitor_updating_paused(&mut self, resend_raa: bool, resend_commitment: bool,
4122 resend_channel_ready: bool, mut pending_forwards: Vec<(PendingHTLCInfo, u64)>,
4123 mut pending_fails: Vec<(HTLCSource, PaymentHash, HTLCFailReason)>,
4124 mut pending_finalized_claimed_htlcs: Vec<HTLCSource>
4126 self.context.monitor_pending_revoke_and_ack |= resend_raa;
4127 self.context.monitor_pending_commitment_signed |= resend_commitment;
4128 self.context.monitor_pending_channel_ready |= resend_channel_ready;
4129 self.context.monitor_pending_forwards.append(&mut pending_forwards);
4130 self.context.monitor_pending_failures.append(&mut pending_fails);
4131 self.context.monitor_pending_finalized_fulfills.append(&mut pending_finalized_claimed_htlcs);
4132 self.context.channel_state.set_monitor_update_in_progress();
4135 /// Indicates that the latest ChannelMonitor update has been committed by the client
4136 /// successfully and we should restore normal operation. Returns messages which should be sent
4137 /// to the remote side.
4138 pub fn monitor_updating_restored<L: Deref, NS: Deref>(
4139 &mut self, logger: &L, node_signer: &NS, chain_hash: ChainHash,
4140 user_config: &UserConfig, best_block_height: u32
4141 ) -> MonitorRestoreUpdates
4144 NS::Target: NodeSigner
4146 assert!(self.context.channel_state.is_monitor_update_in_progress());
4147 self.context.channel_state.clear_monitor_update_in_progress();
4149 // If we're past (or at) the AwaitingChannelReady stage on an outbound channel, try to
4150 // (re-)broadcast the funding transaction as we may have declined to broadcast it when we
4151 // first received the funding_signed.
4152 let mut funding_broadcastable =
4153 if self.context.is_outbound() &&
4154 matches!(self.context.channel_state, ChannelState::AwaitingChannelReady(flags) if !flags.is_set(AwaitingChannelReadyFlags::WAITING_FOR_BATCH)) ||
4155 matches!(self.context.channel_state, ChannelState::ChannelReady(_))
4157 self.context.funding_transaction.take()
4159 // That said, if the funding transaction is already confirmed (ie we're active with a
4160 // minimum_depth over 0) don't bother re-broadcasting the confirmed funding tx.
4161 if matches!(self.context.channel_state, ChannelState::ChannelReady(_)) && self.context.minimum_depth != Some(0) {
4162 funding_broadcastable = None;
4165 // We will never broadcast the funding transaction when we're in MonitorUpdateInProgress
4166 // (and we assume the user never directly broadcasts the funding transaction and waits for
4167 // us to do it). Thus, we can only ever hit monitor_pending_channel_ready when we're
4168 // * an inbound channel that failed to persist the monitor on funding_created and we got
4169 // the funding transaction confirmed before the monitor was persisted, or
4170 // * a 0-conf channel and intended to send the channel_ready before any broadcast at all.
4171 let channel_ready = if self.context.monitor_pending_channel_ready {
4172 assert!(!self.context.is_outbound() || self.context.minimum_depth == Some(0),
4173 "Funding transaction broadcast by the local client before it should have - LDK didn't do it!");
4174 self.context.monitor_pending_channel_ready = false;
4175 let next_per_commitment_point = self.context.holder_signer.as_ref().get_per_commitment_point(self.context.cur_holder_commitment_transaction_number, &self.context.secp_ctx);
4176 Some(msgs::ChannelReady {
4177 channel_id: self.context.channel_id(),
4178 next_per_commitment_point,
4179 short_channel_id_alias: Some(self.context.outbound_scid_alias),
4183 let announcement_sigs = self.get_announcement_sigs(node_signer, chain_hash, user_config, best_block_height, logger);
4185 let mut accepted_htlcs = Vec::new();
4186 mem::swap(&mut accepted_htlcs, &mut self.context.monitor_pending_forwards);
4187 let mut failed_htlcs = Vec::new();
4188 mem::swap(&mut failed_htlcs, &mut self.context.monitor_pending_failures);
4189 let mut finalized_claimed_htlcs = Vec::new();
4190 mem::swap(&mut finalized_claimed_htlcs, &mut self.context.monitor_pending_finalized_fulfills);
4192 if self.context.channel_state.is_peer_disconnected() {
4193 self.context.monitor_pending_revoke_and_ack = false;
4194 self.context.monitor_pending_commitment_signed = false;
4195 return MonitorRestoreUpdates {
4196 raa: None, commitment_update: None, order: RAACommitmentOrder::RevokeAndACKFirst,
4197 accepted_htlcs, failed_htlcs, finalized_claimed_htlcs, funding_broadcastable, channel_ready, announcement_sigs
4201 let raa = if self.context.monitor_pending_revoke_and_ack {
4202 Some(self.get_last_revoke_and_ack())
4204 let commitment_update = if self.context.monitor_pending_commitment_signed {
4205 self.get_last_commitment_update_for_send(logger).ok()
4207 if commitment_update.is_some() {
4208 self.mark_awaiting_response();
4211 self.context.monitor_pending_revoke_and_ack = false;
4212 self.context.monitor_pending_commitment_signed = false;
4213 let order = self.context.resend_order.clone();
4214 log_debug!(logger, "Restored monitor updating in channel {} resulting in {}{} commitment update and {} RAA, with {} first",
4215 &self.context.channel_id(), if funding_broadcastable.is_some() { "a funding broadcastable, " } else { "" },
4216 if commitment_update.is_some() { "a" } else { "no" }, if raa.is_some() { "an" } else { "no" },
4217 match order { RAACommitmentOrder::CommitmentFirst => "commitment", RAACommitmentOrder::RevokeAndACKFirst => "RAA"});
4218 MonitorRestoreUpdates {
4219 raa, commitment_update, order, accepted_htlcs, failed_htlcs, finalized_claimed_htlcs, funding_broadcastable, channel_ready, announcement_sigs
4223 pub fn update_fee<F: Deref, L: Deref>(&mut self, fee_estimator: &LowerBoundedFeeEstimator<F>, msg: &msgs::UpdateFee, logger: &L) -> Result<(), ChannelError>
4224 where F::Target: FeeEstimator, L::Target: Logger
4226 if self.context.is_outbound() {
4227 return Err(ChannelError::Close("Non-funding remote tried to update channel fee".to_owned()));
4229 if self.context.channel_state.is_peer_disconnected() {
4230 return Err(ChannelError::Close("Peer sent update_fee when we needed a channel_reestablish".to_owned()));
4232 Channel::<SP>::check_remote_fee(&self.context.channel_type, fee_estimator, msg.feerate_per_kw, Some(self.context.feerate_per_kw), logger)?;
4234 self.context.pending_update_fee = Some((msg.feerate_per_kw, FeeUpdateState::RemoteAnnounced));
4235 self.context.update_time_counter += 1;
4236 // Check that we won't be pushed over our dust exposure limit by the feerate increase.
4237 if !self.context.channel_type.supports_anchors_zero_fee_htlc_tx() {
4238 let inbound_stats = self.context.get_inbound_pending_htlc_stats(None);
4239 let outbound_stats = self.context.get_outbound_pending_htlc_stats(None);
4240 let holder_tx_dust_exposure = inbound_stats.on_holder_tx_dust_exposure_msat + outbound_stats.on_holder_tx_dust_exposure_msat;
4241 let counterparty_tx_dust_exposure = inbound_stats.on_counterparty_tx_dust_exposure_msat + outbound_stats.on_counterparty_tx_dust_exposure_msat;
4242 let max_dust_htlc_exposure_msat = self.context.get_max_dust_htlc_exposure_msat(fee_estimator);
4243 if holder_tx_dust_exposure > max_dust_htlc_exposure_msat {
4244 return Err(ChannelError::Close(format!("Peer sent update_fee with a feerate ({}) which may over-expose us to dust-in-flight on our own transactions (totaling {} msat)",
4245 msg.feerate_per_kw, holder_tx_dust_exposure)));
4247 if counterparty_tx_dust_exposure > max_dust_htlc_exposure_msat {
4248 return Err(ChannelError::Close(format!("Peer sent update_fee with a feerate ({}) which may over-expose us to dust-in-flight on our counterparty's transactions (totaling {} msat)",
4249 msg.feerate_per_kw, counterparty_tx_dust_exposure)));
4255 /// Indicates that the signer may have some signatures for us, so we should retry if we're
4258 pub fn signer_maybe_unblocked<L: Deref>(&mut self, logger: &L) -> SignerResumeUpdates where L::Target: Logger {
4259 let commitment_update = if self.context.signer_pending_commitment_update {
4260 self.get_last_commitment_update_for_send(logger).ok()
4262 let funding_signed = if self.context.signer_pending_funding && !self.context.is_outbound() {
4263 self.context.get_funding_signed_msg(logger).1
4265 let channel_ready = if funding_signed.is_some() {
4266 self.check_get_channel_ready(0)
4269 log_trace!(logger, "Signer unblocked with {} commitment_update, {} funding_signed and {} channel_ready",
4270 if commitment_update.is_some() { "a" } else { "no" },
4271 if funding_signed.is_some() { "a" } else { "no" },
4272 if channel_ready.is_some() { "a" } else { "no" });
4274 SignerResumeUpdates {
4281 fn get_last_revoke_and_ack(&self) -> msgs::RevokeAndACK {
4282 let next_per_commitment_point = self.context.holder_signer.as_ref().get_per_commitment_point(self.context.cur_holder_commitment_transaction_number, &self.context.secp_ctx);
4283 let per_commitment_secret = self.context.holder_signer.as_ref().release_commitment_secret(self.context.cur_holder_commitment_transaction_number + 2);
4284 msgs::RevokeAndACK {
4285 channel_id: self.context.channel_id,
4286 per_commitment_secret,
4287 next_per_commitment_point,
4289 next_local_nonce: None,
4293 /// Gets the last commitment update for immediate sending to our peer.
4294 fn get_last_commitment_update_for_send<L: Deref>(&mut self, logger: &L) -> Result<msgs::CommitmentUpdate, ()> where L::Target: Logger {
4295 let mut update_add_htlcs = Vec::new();
4296 let mut update_fulfill_htlcs = Vec::new();
4297 let mut update_fail_htlcs = Vec::new();
4298 let mut update_fail_malformed_htlcs = Vec::new();
4300 for htlc in self.context.pending_outbound_htlcs.iter() {
4301 if let &OutboundHTLCState::LocalAnnounced(ref onion_packet) = &htlc.state {
4302 update_add_htlcs.push(msgs::UpdateAddHTLC {
4303 channel_id: self.context.channel_id(),
4304 htlc_id: htlc.htlc_id,
4305 amount_msat: htlc.amount_msat,
4306 payment_hash: htlc.payment_hash,
4307 cltv_expiry: htlc.cltv_expiry,
4308 onion_routing_packet: (**onion_packet).clone(),
4309 skimmed_fee_msat: htlc.skimmed_fee_msat,
4310 blinding_point: htlc.blinding_point,
4315 for htlc in self.context.pending_inbound_htlcs.iter() {
4316 if let &InboundHTLCState::LocalRemoved(ref reason) = &htlc.state {
4318 &InboundHTLCRemovalReason::FailRelay(ref err_packet) => {
4319 update_fail_htlcs.push(msgs::UpdateFailHTLC {
4320 channel_id: self.context.channel_id(),
4321 htlc_id: htlc.htlc_id,
4322 reason: err_packet.clone()
4325 &InboundHTLCRemovalReason::FailMalformed((ref sha256_of_onion, ref failure_code)) => {
4326 update_fail_malformed_htlcs.push(msgs::UpdateFailMalformedHTLC {
4327 channel_id: self.context.channel_id(),
4328 htlc_id: htlc.htlc_id,
4329 sha256_of_onion: sha256_of_onion.clone(),
4330 failure_code: failure_code.clone(),
4333 &InboundHTLCRemovalReason::Fulfill(ref payment_preimage) => {
4334 update_fulfill_htlcs.push(msgs::UpdateFulfillHTLC {
4335 channel_id: self.context.channel_id(),
4336 htlc_id: htlc.htlc_id,
4337 payment_preimage: payment_preimage.clone(),
4344 let update_fee = if self.context.is_outbound() && self.context.pending_update_fee.is_some() {
4345 Some(msgs::UpdateFee {
4346 channel_id: self.context.channel_id(),
4347 feerate_per_kw: self.context.pending_update_fee.unwrap().0,
4351 log_trace!(logger, "Regenerating latest commitment update in channel {} with{} {} update_adds, {} update_fulfills, {} update_fails, and {} update_fail_malformeds",
4352 &self.context.channel_id(), if update_fee.is_some() { " update_fee," } else { "" },
4353 update_add_htlcs.len(), update_fulfill_htlcs.len(), update_fail_htlcs.len(), update_fail_malformed_htlcs.len());
4354 let commitment_signed = if let Ok(update) = self.send_commitment_no_state_update(logger).map(|(cu, _)| cu) {
4355 if self.context.signer_pending_commitment_update {
4356 log_trace!(logger, "Commitment update generated: clearing signer_pending_commitment_update");
4357 self.context.signer_pending_commitment_update = false;
4361 if !self.context.signer_pending_commitment_update {
4362 log_trace!(logger, "Commitment update awaiting signer: setting signer_pending_commitment_update");
4363 self.context.signer_pending_commitment_update = true;
4367 Ok(msgs::CommitmentUpdate {
4368 update_add_htlcs, update_fulfill_htlcs, update_fail_htlcs, update_fail_malformed_htlcs, update_fee,
4373 /// Gets the `Shutdown` message we should send our peer on reconnect, if any.
4374 pub fn get_outbound_shutdown(&self) -> Option<msgs::Shutdown> {
4375 if self.context.channel_state.is_local_shutdown_sent() {
4376 assert!(self.context.shutdown_scriptpubkey.is_some());
4377 Some(msgs::Shutdown {
4378 channel_id: self.context.channel_id,
4379 scriptpubkey: self.get_closing_scriptpubkey(),
4384 /// May panic if some calls other than message-handling calls (which will all Err immediately)
4385 /// have been called between remove_uncommitted_htlcs_and_mark_paused and this call.
4387 /// Some links printed in log lines are included here to check them during build (when run with
4388 /// `cargo doc --document-private-items`):
4389 /// [`super::channelmanager::ChannelManager::force_close_without_broadcasting_txn`] and
4390 /// [`super::channelmanager::ChannelManager::force_close_all_channels_without_broadcasting_txn`].
4391 pub fn channel_reestablish<L: Deref, NS: Deref>(
4392 &mut self, msg: &msgs::ChannelReestablish, logger: &L, node_signer: &NS,
4393 chain_hash: ChainHash, user_config: &UserConfig, best_block: &BestBlock
4394 ) -> Result<ReestablishResponses, ChannelError>
4397 NS::Target: NodeSigner
4399 if !self.context.channel_state.is_peer_disconnected() {
4400 // While BOLT 2 doesn't indicate explicitly we should error this channel here, it
4401 // almost certainly indicates we are going to end up out-of-sync in some way, so we
4402 // just close here instead of trying to recover.
4403 return Err(ChannelError::Close("Peer sent a loose channel_reestablish not after reconnect".to_owned()));
4406 if msg.next_local_commitment_number >= INITIAL_COMMITMENT_NUMBER || msg.next_remote_commitment_number >= INITIAL_COMMITMENT_NUMBER ||
4407 msg.next_local_commitment_number == 0 {
4408 return Err(ChannelError::Close("Peer sent an invalid channel_reestablish to force close in a non-standard way".to_owned()));
4411 let our_commitment_transaction = INITIAL_COMMITMENT_NUMBER - self.context.cur_holder_commitment_transaction_number - 1;
4412 if msg.next_remote_commitment_number > 0 {
4413 let expected_point = self.context.holder_signer.as_ref().get_per_commitment_point(INITIAL_COMMITMENT_NUMBER - msg.next_remote_commitment_number + 1, &self.context.secp_ctx);
4414 let given_secret = SecretKey::from_slice(&msg.your_last_per_commitment_secret)
4415 .map_err(|_| ChannelError::Close("Peer sent a garbage channel_reestablish with unparseable secret key".to_owned()))?;
4416 if expected_point != PublicKey::from_secret_key(&self.context.secp_ctx, &given_secret) {
4417 return Err(ChannelError::Close("Peer sent a garbage channel_reestablish with secret key not matching the commitment height provided".to_owned()));
4419 if msg.next_remote_commitment_number > our_commitment_transaction {
4420 macro_rules! log_and_panic {
4421 ($err_msg: expr) => {
4422 log_error!(logger, $err_msg, &self.context.channel_id, log_pubkey!(self.context.counterparty_node_id));
4423 panic!($err_msg, &self.context.channel_id, log_pubkey!(self.context.counterparty_node_id));
4426 log_and_panic!("We have fallen behind - we have received proof that if we broadcast our counterparty is going to claim all our funds.\n\
4427 This implies you have restarted with lost ChannelMonitor and ChannelManager state, the first of which is a violation of the LDK chain::Watch requirements.\n\
4428 More specifically, this means you have a bug in your implementation that can cause loss of funds, or you are running with an old backup, which is unsafe.\n\
4429 If you have restored from an old backup and wish to force-close channels and return to operation, you should start up, call\n\
4430 ChannelManager::force_close_without_broadcasting_txn on channel {} with counterparty {} or\n\
4431 ChannelManager::force_close_all_channels_without_broadcasting_txn, then reconnect to peer(s).\n\
4432 Note that due to a long-standing bug in lnd you may have to reach out to peers running lnd-based nodes to ask them to manually force-close channels\n\
4433 See https://github.com/lightningdevkit/rust-lightning/issues/1565 for more info.");
4437 // Before we change the state of the channel, we check if the peer is sending a very old
4438 // commitment transaction number, if yes we send a warning message.
4439 if msg.next_remote_commitment_number + 1 < our_commitment_transaction {
4440 return Err(ChannelError::Warn(format!(
4441 "Peer attempted to reestablish channel with a very old local commitment transaction: {} (received) vs {} (expected)",
4442 msg.next_remote_commitment_number,
4443 our_commitment_transaction
4447 // Go ahead and unmark PeerDisconnected as various calls we may make check for it (and all
4448 // remaining cases either succeed or ErrorMessage-fail).
4449 self.context.channel_state.clear_peer_disconnected();
4450 self.context.sent_message_awaiting_response = None;
4452 let shutdown_msg = self.get_outbound_shutdown();
4454 let announcement_sigs = self.get_announcement_sigs(node_signer, chain_hash, user_config, best_block.height(), logger);
4456 if matches!(self.context.channel_state, ChannelState::AwaitingChannelReady(_)) {
4457 // If we're waiting on a monitor update, we shouldn't re-send any channel_ready's.
4458 if !self.context.channel_state.is_our_channel_ready() ||
4459 self.context.channel_state.is_monitor_update_in_progress() {
4460 if msg.next_remote_commitment_number != 0 {
4461 return Err(ChannelError::Close("Peer claimed they saw a revoke_and_ack but we haven't sent channel_ready yet".to_owned()));
4463 // Short circuit the whole handler as there is nothing we can resend them
4464 return Ok(ReestablishResponses {
4465 channel_ready: None,
4466 raa: None, commitment_update: None,
4467 order: RAACommitmentOrder::CommitmentFirst,
4468 shutdown_msg, announcement_sigs,
4472 // We have OurChannelReady set!
4473 let next_per_commitment_point = self.context.holder_signer.as_ref().get_per_commitment_point(self.context.cur_holder_commitment_transaction_number, &self.context.secp_ctx);
4474 return Ok(ReestablishResponses {
4475 channel_ready: Some(msgs::ChannelReady {
4476 channel_id: self.context.channel_id(),
4477 next_per_commitment_point,
4478 short_channel_id_alias: Some(self.context.outbound_scid_alias),
4480 raa: None, commitment_update: None,
4481 order: RAACommitmentOrder::CommitmentFirst,
4482 shutdown_msg, announcement_sigs,
4486 let required_revoke = if msg.next_remote_commitment_number == our_commitment_transaction {
4487 // Remote isn't waiting on any RevokeAndACK from us!
4488 // Note that if we need to repeat our ChannelReady we'll do that in the next if block.
4490 } else if msg.next_remote_commitment_number + 1 == our_commitment_transaction {
4491 if self.context.channel_state.is_monitor_update_in_progress() {
4492 self.context.monitor_pending_revoke_and_ack = true;
4495 Some(self.get_last_revoke_and_ack())
4498 debug_assert!(false, "All values should have been handled in the four cases above");
4499 return Err(ChannelError::Close(format!(
4500 "Peer attempted to reestablish channel expecting a future local commitment transaction: {} (received) vs {} (expected)",
4501 msg.next_remote_commitment_number,
4502 our_commitment_transaction
4506 // We increment cur_counterparty_commitment_transaction_number only upon receipt of
4507 // revoke_and_ack, not on sending commitment_signed, so we add one if have
4508 // AwaitingRemoteRevoke set, which indicates we sent a commitment_signed but haven't gotten
4509 // the corresponding revoke_and_ack back yet.
4510 let is_awaiting_remote_revoke = self.context.channel_state.is_awaiting_remote_revoke();
4511 if is_awaiting_remote_revoke && !self.is_awaiting_monitor_update() {
4512 self.mark_awaiting_response();
4514 let next_counterparty_commitment_number = INITIAL_COMMITMENT_NUMBER - self.context.cur_counterparty_commitment_transaction_number + if is_awaiting_remote_revoke { 1 } else { 0 };
4516 let channel_ready = if msg.next_local_commitment_number == 1 && INITIAL_COMMITMENT_NUMBER - self.context.cur_holder_commitment_transaction_number == 1 {
4517 // We should never have to worry about MonitorUpdateInProgress resending ChannelReady
4518 let next_per_commitment_point = self.context.holder_signer.as_ref().get_per_commitment_point(self.context.cur_holder_commitment_transaction_number, &self.context.secp_ctx);
4519 Some(msgs::ChannelReady {
4520 channel_id: self.context.channel_id(),
4521 next_per_commitment_point,
4522 short_channel_id_alias: Some(self.context.outbound_scid_alias),
4526 if msg.next_local_commitment_number == next_counterparty_commitment_number {
4527 if required_revoke.is_some() {
4528 log_debug!(logger, "Reconnected channel {} with only lost outbound RAA", &self.context.channel_id());
4530 log_debug!(logger, "Reconnected channel {} with no loss", &self.context.channel_id());
4533 Ok(ReestablishResponses {
4534 channel_ready, shutdown_msg, announcement_sigs,
4535 raa: required_revoke,
4536 commitment_update: None,
4537 order: self.context.resend_order.clone(),
4539 } else if msg.next_local_commitment_number == next_counterparty_commitment_number - 1 {
4540 if required_revoke.is_some() {
4541 log_debug!(logger, "Reconnected channel {} with lost outbound RAA and lost remote commitment tx", &self.context.channel_id());
4543 log_debug!(logger, "Reconnected channel {} with only lost remote commitment tx", &self.context.channel_id());
4546 if self.context.channel_state.is_monitor_update_in_progress() {
4547 self.context.monitor_pending_commitment_signed = true;
4548 Ok(ReestablishResponses {
4549 channel_ready, shutdown_msg, announcement_sigs,
4550 commitment_update: None, raa: None,
4551 order: self.context.resend_order.clone(),
4554 Ok(ReestablishResponses {
4555 channel_ready, shutdown_msg, announcement_sigs,
4556 raa: required_revoke,
4557 commitment_update: self.get_last_commitment_update_for_send(logger).ok(),
4558 order: self.context.resend_order.clone(),
4561 } else if msg.next_local_commitment_number < next_counterparty_commitment_number {
4562 Err(ChannelError::Close(format!(
4563 "Peer attempted to reestablish channel with a very old remote commitment transaction: {} (received) vs {} (expected)",
4564 msg.next_local_commitment_number,
4565 next_counterparty_commitment_number,
4568 Err(ChannelError::Close(format!(
4569 "Peer attempted to reestablish channel with a future remote commitment transaction: {} (received) vs {} (expected)",
4570 msg.next_local_commitment_number,
4571 next_counterparty_commitment_number,
4576 /// Calculates and returns our minimum and maximum closing transaction fee amounts, in whole
4577 /// satoshis. The amounts remain consistent unless a peer disconnects/reconnects or we restart,
4578 /// at which point they will be recalculated.
4579 fn calculate_closing_fee_limits<F: Deref>(&mut self, fee_estimator: &LowerBoundedFeeEstimator<F>)
4581 where F::Target: FeeEstimator
4583 if let Some((min, max)) = self.context.closing_fee_limits { return (min, max); }
4585 // Propose a range from our current Background feerate to our Normal feerate plus our
4586 // force_close_avoidance_max_fee_satoshis.
4587 // If we fail to come to consensus, we'll have to force-close.
4588 let mut proposed_feerate = fee_estimator.bounded_sat_per_1000_weight(ConfirmationTarget::ChannelCloseMinimum);
4589 // Use NonAnchorChannelFee because this should be an estimate for a channel close
4590 // that we don't expect to need fee bumping
4591 let normal_feerate = fee_estimator.bounded_sat_per_1000_weight(ConfirmationTarget::NonAnchorChannelFee);
4592 let mut proposed_max_feerate = if self.context.is_outbound() { normal_feerate } else { u32::max_value() };
4594 // The spec requires that (when the channel does not have anchors) we only send absolute
4595 // channel fees no greater than the absolute channel fee on the current commitment
4596 // transaction. It's unclear *which* commitment transaction this refers to, and there isn't
4597 // very good reason to apply such a limit in any case. We don't bother doing so, risking
4598 // some force-closure by old nodes, but we wanted to close the channel anyway.
4600 if let Some(target_feerate) = self.context.target_closing_feerate_sats_per_kw {
4601 let min_feerate = if self.context.is_outbound() { target_feerate } else { cmp::min(self.context.feerate_per_kw, target_feerate) };
4602 proposed_feerate = cmp::max(proposed_feerate, min_feerate);
4603 proposed_max_feerate = cmp::max(proposed_max_feerate, min_feerate);
4606 // Note that technically we could end up with a lower minimum fee if one sides' balance is
4607 // below our dust limit, causing the output to disappear. We don't bother handling this
4608 // case, however, as this should only happen if a channel is closed before any (material)
4609 // payments have been made on it. This may cause slight fee overpayment and/or failure to
4610 // come to consensus with our counterparty on appropriate fees, however it should be a
4611 // relatively rare case. We can revisit this later, though note that in order to determine
4612 // if the funders' output is dust we have to know the absolute fee we're going to use.
4613 let tx_weight = self.get_closing_transaction_weight(Some(&self.get_closing_scriptpubkey()), Some(self.context.counterparty_shutdown_scriptpubkey.as_ref().unwrap()));
4614 let proposed_total_fee_satoshis = proposed_feerate as u64 * tx_weight / 1000;
4615 let proposed_max_total_fee_satoshis = if self.context.is_outbound() {
4616 // We always add force_close_avoidance_max_fee_satoshis to our normal
4617 // feerate-calculated fee, but allow the max to be overridden if we're using a
4618 // target feerate-calculated fee.
4619 cmp::max(normal_feerate as u64 * tx_weight / 1000 + self.context.config.options.force_close_avoidance_max_fee_satoshis,
4620 proposed_max_feerate as u64 * tx_weight / 1000)
4622 self.context.channel_value_satoshis - (self.context.value_to_self_msat + 999) / 1000
4625 self.context.closing_fee_limits = Some((proposed_total_fee_satoshis, proposed_max_total_fee_satoshis));
4626 self.context.closing_fee_limits.clone().unwrap()
4629 /// Returns true if we're ready to commence the closing_signed negotiation phase. This is true
4630 /// after both sides have exchanged a `shutdown` message and all HTLCs have been drained. At
4631 /// this point if we're the funder we should send the initial closing_signed, and in any case
4632 /// shutdown should complete within a reasonable timeframe.
4633 fn closing_negotiation_ready(&self) -> bool {
4634 self.context.closing_negotiation_ready()
4637 /// Checks if the closing_signed negotiation is making appropriate progress, possibly returning
4638 /// an Err if no progress is being made and the channel should be force-closed instead.
4639 /// Should be called on a one-minute timer.
4640 pub fn timer_check_closing_negotiation_progress(&mut self) -> Result<(), ChannelError> {
4641 if self.closing_negotiation_ready() {
4642 if self.context.closing_signed_in_flight {
4643 return Err(ChannelError::Close("closing_signed negotiation failed to finish within two timer ticks".to_owned()));
4645 self.context.closing_signed_in_flight = true;
4651 pub fn maybe_propose_closing_signed<F: Deref, L: Deref>(
4652 &mut self, fee_estimator: &LowerBoundedFeeEstimator<F>, logger: &L)
4653 -> Result<(Option<msgs::ClosingSigned>, Option<Transaction>, Option<ShutdownResult>), ChannelError>
4654 where F::Target: FeeEstimator, L::Target: Logger
4656 // If we're waiting on a monitor persistence, that implies we're also waiting to send some
4657 // message to our counterparty (probably a `revoke_and_ack`). In such a case, we shouldn't
4658 // initiate `closing_signed` negotiation until we're clear of all pending messages. Note
4659 // that closing_negotiation_ready checks this case (as well as a few others).
4660 if self.context.last_sent_closing_fee.is_some() || !self.closing_negotiation_ready() {
4661 return Ok((None, None, None));
4664 if !self.context.is_outbound() {
4665 if let Some(msg) = &self.context.pending_counterparty_closing_signed.take() {
4666 return self.closing_signed(fee_estimator, &msg);
4668 return Ok((None, None, None));
4671 // If we're waiting on a counterparty `commitment_signed` to clear some updates from our
4672 // local commitment transaction, we can't yet initiate `closing_signed` negotiation.
4673 if self.context.expecting_peer_commitment_signed {
4674 return Ok((None, None, None));
4677 let (our_min_fee, our_max_fee) = self.calculate_closing_fee_limits(fee_estimator);
4679 assert!(self.context.shutdown_scriptpubkey.is_some());
4680 let (closing_tx, total_fee_satoshis) = self.build_closing_transaction(our_min_fee, false);
4681 log_trace!(logger, "Proposing initial closing_signed for our counterparty with a fee range of {}-{} sat (with initial proposal {} sats)",
4682 our_min_fee, our_max_fee, total_fee_satoshis);
4684 match &self.context.holder_signer {
4685 ChannelSignerType::Ecdsa(ecdsa) => {
4687 .sign_closing_transaction(&closing_tx, &self.context.secp_ctx)
4688 .map_err(|()| ChannelError::Close("Failed to get signature for closing transaction.".to_owned()))?;
4690 self.context.last_sent_closing_fee = Some((total_fee_satoshis, sig.clone()));
4691 Ok((Some(msgs::ClosingSigned {
4692 channel_id: self.context.channel_id,
4693 fee_satoshis: total_fee_satoshis,
4695 fee_range: Some(msgs::ClosingSignedFeeRange {
4696 min_fee_satoshis: our_min_fee,
4697 max_fee_satoshis: our_max_fee,
4701 // TODO (taproot|arik)
4707 // Marks a channel as waiting for a response from the counterparty. If it's not received
4708 // [`DISCONNECT_PEER_AWAITING_RESPONSE_TICKS`] after sending our own to them, then we'll attempt
4710 fn mark_awaiting_response(&mut self) {
4711 self.context.sent_message_awaiting_response = Some(0);
4714 /// Determines whether we should disconnect the counterparty due to not receiving a response
4715 /// within our expected timeframe.
4717 /// This should be called on every [`super::channelmanager::ChannelManager::timer_tick_occurred`].
4718 pub fn should_disconnect_peer_awaiting_response(&mut self) -> bool {
4719 let ticks_elapsed = if let Some(ticks_elapsed) = self.context.sent_message_awaiting_response.as_mut() {
4722 // Don't disconnect when we're not waiting on a response.
4725 *ticks_elapsed += 1;
4726 *ticks_elapsed >= DISCONNECT_PEER_AWAITING_RESPONSE_TICKS
4730 &mut self, signer_provider: &SP, their_features: &InitFeatures, msg: &msgs::Shutdown
4731 ) -> Result<(Option<msgs::Shutdown>, Option<ChannelMonitorUpdate>, Vec<(HTLCSource, PaymentHash)>), ChannelError>
4733 if self.context.channel_state.is_peer_disconnected() {
4734 return Err(ChannelError::Close("Peer sent shutdown when we needed a channel_reestablish".to_owned()));
4736 if self.context.channel_state.is_pre_funded_state() {
4737 // Spec says we should fail the connection, not the channel, but that's nonsense, there
4738 // are plenty of reasons you may want to fail a channel pre-funding, and spec says you
4739 // can do that via error message without getting a connection fail anyway...
4740 return Err(ChannelError::Close("Peer sent shutdown pre-funding generation".to_owned()));
4742 for htlc in self.context.pending_inbound_htlcs.iter() {
4743 if let InboundHTLCState::RemoteAnnounced(_) = htlc.state {
4744 return Err(ChannelError::Close("Got shutdown with remote pending HTLCs".to_owned()));
4747 assert!(!matches!(self.context.channel_state, ChannelState::ShutdownComplete));
4749 if !script::is_bolt2_compliant(&msg.scriptpubkey, their_features) {
4750 return Err(ChannelError::Warn(format!("Got a nonstandard scriptpubkey ({}) from remote peer", msg.scriptpubkey.to_hex_string())));
4753 if self.context.counterparty_shutdown_scriptpubkey.is_some() {
4754 if Some(&msg.scriptpubkey) != self.context.counterparty_shutdown_scriptpubkey.as_ref() {
4755 return Err(ChannelError::Warn(format!("Got shutdown request with a scriptpubkey ({}) which did not match their previous scriptpubkey.", msg.scriptpubkey.to_hex_string())));
4758 self.context.counterparty_shutdown_scriptpubkey = Some(msg.scriptpubkey.clone());
4761 // If we have any LocalAnnounced updates we'll probably just get back an update_fail_htlc
4762 // immediately after the commitment dance, but we can send a Shutdown because we won't send
4763 // any further commitment updates after we set LocalShutdownSent.
4764 let send_shutdown = !self.context.channel_state.is_local_shutdown_sent();
4766 let update_shutdown_script = match self.context.shutdown_scriptpubkey {
4769 assert!(send_shutdown);
4770 let shutdown_scriptpubkey = match signer_provider.get_shutdown_scriptpubkey() {
4771 Ok(scriptpubkey) => scriptpubkey,
4772 Err(_) => return Err(ChannelError::Close("Failed to get shutdown scriptpubkey".to_owned())),
4774 if !shutdown_scriptpubkey.is_compatible(their_features) {
4775 return Err(ChannelError::Close(format!("Provided a scriptpubkey format not accepted by peer: {}", shutdown_scriptpubkey)));
4777 self.context.shutdown_scriptpubkey = Some(shutdown_scriptpubkey);
4782 // From here on out, we may not fail!
4784 self.context.channel_state.set_remote_shutdown_sent();
4785 self.context.update_time_counter += 1;
4787 let monitor_update = if update_shutdown_script {
4788 self.context.latest_monitor_update_id += 1;
4789 let monitor_update = ChannelMonitorUpdate {
4790 update_id: self.context.latest_monitor_update_id,
4791 updates: vec![ChannelMonitorUpdateStep::ShutdownScript {
4792 scriptpubkey: self.get_closing_scriptpubkey(),
4795 self.monitor_updating_paused(false, false, false, Vec::new(), Vec::new(), Vec::new());
4796 self.push_ret_blockable_mon_update(monitor_update)
4798 let shutdown = if send_shutdown {
4799 Some(msgs::Shutdown {
4800 channel_id: self.context.channel_id,
4801 scriptpubkey: self.get_closing_scriptpubkey(),
4805 // We can't send our shutdown until we've committed all of our pending HTLCs, but the
4806 // remote side is unlikely to accept any new HTLCs, so we go ahead and "free" any holding
4807 // cell HTLCs and return them to fail the payment.
4808 self.context.holding_cell_update_fee = None;
4809 let mut dropped_outbound_htlcs = Vec::with_capacity(self.context.holding_cell_htlc_updates.len());
4810 self.context.holding_cell_htlc_updates.retain(|htlc_update| {
4812 &HTLCUpdateAwaitingACK::AddHTLC { ref payment_hash, ref source, .. } => {
4813 dropped_outbound_htlcs.push((source.clone(), payment_hash.clone()));
4820 self.context.channel_state.set_local_shutdown_sent();
4821 self.context.update_time_counter += 1;
4823 Ok((shutdown, monitor_update, dropped_outbound_htlcs))
4826 fn build_signed_closing_transaction(&self, closing_tx: &ClosingTransaction, counterparty_sig: &Signature, sig: &Signature) -> Transaction {
4827 let mut tx = closing_tx.trust().built_transaction().clone();
4829 tx.input[0].witness.push(Vec::new()); // First is the multisig dummy
4831 let funding_key = self.context.get_holder_pubkeys().funding_pubkey.serialize();
4832 let counterparty_funding_key = self.context.counterparty_funding_pubkey().serialize();
4833 let mut holder_sig = sig.serialize_der().to_vec();
4834 holder_sig.push(EcdsaSighashType::All as u8);
4835 let mut cp_sig = counterparty_sig.serialize_der().to_vec();
4836 cp_sig.push(EcdsaSighashType::All as u8);
4837 if funding_key[..] < counterparty_funding_key[..] {
4838 tx.input[0].witness.push(holder_sig);
4839 tx.input[0].witness.push(cp_sig);
4841 tx.input[0].witness.push(cp_sig);
4842 tx.input[0].witness.push(holder_sig);
4845 tx.input[0].witness.push(self.context.get_funding_redeemscript().into_bytes());
4849 pub fn closing_signed<F: Deref>(
4850 &mut self, fee_estimator: &LowerBoundedFeeEstimator<F>, msg: &msgs::ClosingSigned)
4851 -> Result<(Option<msgs::ClosingSigned>, Option<Transaction>, Option<ShutdownResult>), ChannelError>
4852 where F::Target: FeeEstimator
4854 if !self.context.channel_state.is_both_sides_shutdown() {
4855 return Err(ChannelError::Close("Remote end sent us a closing_signed before both sides provided a shutdown".to_owned()));
4857 if self.context.channel_state.is_peer_disconnected() {
4858 return Err(ChannelError::Close("Peer sent closing_signed when we needed a channel_reestablish".to_owned()));
4860 if !self.context.pending_inbound_htlcs.is_empty() || !self.context.pending_outbound_htlcs.is_empty() {
4861 return Err(ChannelError::Close("Remote end sent us a closing_signed while there were still pending HTLCs".to_owned()));
4863 if msg.fee_satoshis > TOTAL_BITCOIN_SUPPLY_SATOSHIS { // this is required to stop potential overflow in build_closing_transaction
4864 return Err(ChannelError::Close("Remote tried to send us a closing tx with > 21 million BTC fee".to_owned()));
4867 if self.context.is_outbound() && self.context.last_sent_closing_fee.is_none() {
4868 return Err(ChannelError::Close("Remote tried to send a closing_signed when we were supposed to propose the first one".to_owned()));
4871 if self.context.channel_state.is_monitor_update_in_progress() {
4872 self.context.pending_counterparty_closing_signed = Some(msg.clone());
4873 return Ok((None, None, None));
4876 let funding_redeemscript = self.context.get_funding_redeemscript();
4877 let (mut closing_tx, used_total_fee) = self.build_closing_transaction(msg.fee_satoshis, false);
4878 if used_total_fee != msg.fee_satoshis {
4879 return Err(ChannelError::Close(format!("Remote sent us a closing_signed with a fee other than the value they can claim. Fee in message: {}. Actual closing tx fee: {}", msg.fee_satoshis, used_total_fee)));
4881 let sighash = closing_tx.trust().get_sighash_all(&funding_redeemscript, self.context.channel_value_satoshis);
4883 match self.context.secp_ctx.verify_ecdsa(&sighash, &msg.signature, &self.context.get_counterparty_pubkeys().funding_pubkey) {
4886 // The remote end may have decided to revoke their output due to inconsistent dust
4887 // limits, so check for that case by re-checking the signature here.
4888 closing_tx = self.build_closing_transaction(msg.fee_satoshis, true).0;
4889 let sighash = closing_tx.trust().get_sighash_all(&funding_redeemscript, self.context.channel_value_satoshis);
4890 secp_check!(self.context.secp_ctx.verify_ecdsa(&sighash, &msg.signature, self.context.counterparty_funding_pubkey()), "Invalid closing tx signature from peer".to_owned());
4894 for outp in closing_tx.trust().built_transaction().output.iter() {
4895 if !outp.script_pubkey.is_witness_program() && outp.value < MAX_STD_OUTPUT_DUST_LIMIT_SATOSHIS {
4896 return Err(ChannelError::Close("Remote sent us a closing_signed with a dust output. Always use segwit closing scripts!".to_owned()));
4900 assert!(self.context.shutdown_scriptpubkey.is_some());
4901 if let Some((last_fee, sig)) = self.context.last_sent_closing_fee {
4902 if last_fee == msg.fee_satoshis {
4903 let shutdown_result = ShutdownResult {
4904 monitor_update: None,
4905 dropped_outbound_htlcs: Vec::new(),
4906 unbroadcasted_batch_funding_txid: self.context.unbroadcasted_batch_funding_txid(),
4907 channel_id: self.context.channel_id,
4908 counterparty_node_id: self.context.counterparty_node_id,
4910 let tx = self.build_signed_closing_transaction(&mut closing_tx, &msg.signature, &sig);
4911 self.context.channel_state = ChannelState::ShutdownComplete;
4912 self.context.update_time_counter += 1;
4913 return Ok((None, Some(tx), Some(shutdown_result)));
4917 let (our_min_fee, our_max_fee) = self.calculate_closing_fee_limits(fee_estimator);
4919 macro_rules! propose_fee {
4920 ($new_fee: expr) => {
4921 let (closing_tx, used_fee) = if $new_fee == msg.fee_satoshis {
4922 (closing_tx, $new_fee)
4924 self.build_closing_transaction($new_fee, false)
4927 return match &self.context.holder_signer {
4928 ChannelSignerType::Ecdsa(ecdsa) => {
4930 .sign_closing_transaction(&closing_tx, &self.context.secp_ctx)
4931 .map_err(|_| ChannelError::Close("External signer refused to sign closing transaction".to_owned()))?;
4932 let (signed_tx, shutdown_result) = if $new_fee == msg.fee_satoshis {
4933 let shutdown_result = ShutdownResult {
4934 monitor_update: None,
4935 dropped_outbound_htlcs: Vec::new(),
4936 unbroadcasted_batch_funding_txid: self.context.unbroadcasted_batch_funding_txid(),
4937 channel_id: self.context.channel_id,
4938 counterparty_node_id: self.context.counterparty_node_id,
4940 self.context.channel_state = ChannelState::ShutdownComplete;
4941 self.context.update_time_counter += 1;
4942 let tx = self.build_signed_closing_transaction(&closing_tx, &msg.signature, &sig);
4943 (Some(tx), Some(shutdown_result))
4948 self.context.last_sent_closing_fee = Some((used_fee, sig.clone()));
4949 Ok((Some(msgs::ClosingSigned {
4950 channel_id: self.context.channel_id,
4951 fee_satoshis: used_fee,
4953 fee_range: Some(msgs::ClosingSignedFeeRange {
4954 min_fee_satoshis: our_min_fee,
4955 max_fee_satoshis: our_max_fee,
4957 }), signed_tx, shutdown_result))
4959 // TODO (taproot|arik)
4966 if let Some(msgs::ClosingSignedFeeRange { min_fee_satoshis, max_fee_satoshis }) = msg.fee_range {
4967 if msg.fee_satoshis < min_fee_satoshis || msg.fee_satoshis > max_fee_satoshis {
4968 return Err(ChannelError::Close(format!("Peer sent a bogus closing_signed - suggested fee of {} sat was not in their desired range of {} sat - {} sat", msg.fee_satoshis, min_fee_satoshis, max_fee_satoshis)));
4970 if max_fee_satoshis < our_min_fee {
4971 return Err(ChannelError::Warn(format!("Unable to come to consensus about closing feerate, remote's max fee ({} sat) was smaller than our min fee ({} sat)", max_fee_satoshis, our_min_fee)));
4973 if min_fee_satoshis > our_max_fee {
4974 return Err(ChannelError::Warn(format!("Unable to come to consensus about closing feerate, remote's min fee ({} sat) was greater than our max fee ({} sat)", min_fee_satoshis, our_max_fee)));
4977 if !self.context.is_outbound() {
4978 // They have to pay, so pick the highest fee in the overlapping range.
4979 // We should never set an upper bound aside from their full balance
4980 debug_assert_eq!(our_max_fee, self.context.channel_value_satoshis - (self.context.value_to_self_msat + 999) / 1000);
4981 propose_fee!(cmp::min(max_fee_satoshis, our_max_fee));
4983 if msg.fee_satoshis < our_min_fee || msg.fee_satoshis > our_max_fee {
4984 return Err(ChannelError::Close(format!("Peer sent a bogus closing_signed - suggested fee of {} sat was not in our desired range of {} sat - {} sat after we informed them of our range.",
4985 msg.fee_satoshis, our_min_fee, our_max_fee)));
4987 // The proposed fee is in our acceptable range, accept it and broadcast!
4988 propose_fee!(msg.fee_satoshis);
4991 // Old fee style negotiation. We don't bother to enforce whether they are complying
4992 // with the "making progress" requirements, we just comply and hope for the best.
4993 if let Some((last_fee, _)) = self.context.last_sent_closing_fee {
4994 if msg.fee_satoshis > last_fee {
4995 if msg.fee_satoshis < our_max_fee {
4996 propose_fee!(msg.fee_satoshis);
4997 } else if last_fee < our_max_fee {
4998 propose_fee!(our_max_fee);
5000 return Err(ChannelError::Close(format!("Unable to come to consensus about closing feerate, remote wants something ({} sat) higher than our max fee ({} sat)", msg.fee_satoshis, our_max_fee)));
5003 if msg.fee_satoshis > our_min_fee {
5004 propose_fee!(msg.fee_satoshis);
5005 } else if last_fee > our_min_fee {
5006 propose_fee!(our_min_fee);
5008 return Err(ChannelError::Close(format!("Unable to come to consensus about closing feerate, remote wants something ({} sat) lower than our min fee ({} sat)", msg.fee_satoshis, our_min_fee)));
5012 if msg.fee_satoshis < our_min_fee {
5013 propose_fee!(our_min_fee);
5014 } else if msg.fee_satoshis > our_max_fee {
5015 propose_fee!(our_max_fee);
5017 propose_fee!(msg.fee_satoshis);
5023 fn internal_htlc_satisfies_config(
5024 &self, htlc: &msgs::UpdateAddHTLC, amt_to_forward: u64, outgoing_cltv_value: u32, config: &ChannelConfig,
5025 ) -> Result<(), (&'static str, u16)> {
5026 let fee = amt_to_forward.checked_mul(config.forwarding_fee_proportional_millionths as u64)
5027 .and_then(|prop_fee| (prop_fee / 1000000).checked_add(config.forwarding_fee_base_msat as u64));
5028 if fee.is_none() || htlc.amount_msat < fee.unwrap() ||
5029 (htlc.amount_msat - fee.unwrap()) < amt_to_forward {
5031 "Prior hop has deviated from specified fees parameters or origin node has obsolete ones",
5032 0x1000 | 12, // fee_insufficient
5035 if (htlc.cltv_expiry as u64) < outgoing_cltv_value as u64 + config.cltv_expiry_delta as u64 {
5037 "Forwarding node has tampered with the intended HTLC values or origin node has an obsolete cltv_expiry_delta",
5038 0x1000 | 13, // incorrect_cltv_expiry
5044 /// Determines whether the parameters of an incoming HTLC to be forwarded satisfy the channel's
5045 /// [`ChannelConfig`]. This first looks at the channel's current [`ChannelConfig`], and if
5046 /// unsuccessful, falls back to the previous one if one exists.
5047 pub fn htlc_satisfies_config(
5048 &self, htlc: &msgs::UpdateAddHTLC, amt_to_forward: u64, outgoing_cltv_value: u32,
5049 ) -> Result<(), (&'static str, u16)> {
5050 self.internal_htlc_satisfies_config(&htlc, amt_to_forward, outgoing_cltv_value, &self.context.config())
5052 if let Some(prev_config) = self.context.prev_config() {
5053 self.internal_htlc_satisfies_config(htlc, amt_to_forward, outgoing_cltv_value, &prev_config)
5060 pub fn get_cur_holder_commitment_transaction_number(&self) -> u64 {
5061 self.context.cur_holder_commitment_transaction_number + 1
5064 pub fn get_cur_counterparty_commitment_transaction_number(&self) -> u64 {
5065 self.context.cur_counterparty_commitment_transaction_number + 1 - if self.context.channel_state.is_awaiting_remote_revoke() { 1 } else { 0 }
5068 pub fn get_revoked_counterparty_commitment_transaction_number(&self) -> u64 {
5069 self.context.cur_counterparty_commitment_transaction_number + 2
5073 pub fn get_signer(&self) -> &ChannelSignerType<SP> {
5074 &self.context.holder_signer
5078 pub fn get_value_stat(&self) -> ChannelValueStat {
5080 value_to_self_msat: self.context.value_to_self_msat,
5081 channel_value_msat: self.context.channel_value_satoshis * 1000,
5082 channel_reserve_msat: self.context.counterparty_selected_channel_reserve_satoshis.unwrap() * 1000,
5083 pending_outbound_htlcs_amount_msat: self.context.pending_outbound_htlcs.iter().map(|ref h| h.amount_msat).sum::<u64>(),
5084 pending_inbound_htlcs_amount_msat: self.context.pending_inbound_htlcs.iter().map(|ref h| h.amount_msat).sum::<u64>(),
5085 holding_cell_outbound_amount_msat: {
5087 for h in self.context.holding_cell_htlc_updates.iter() {
5089 &HTLCUpdateAwaitingACK::AddHTLC{amount_msat, .. } => {
5097 counterparty_max_htlc_value_in_flight_msat: self.context.counterparty_max_htlc_value_in_flight_msat,
5098 counterparty_dust_limit_msat: self.context.counterparty_dust_limit_satoshis * 1000,
5102 /// Returns true if this channel has been marked as awaiting a monitor update to move forward.
5103 /// Allowed in any state (including after shutdown)
5104 pub fn is_awaiting_monitor_update(&self) -> bool {
5105 self.context.channel_state.is_monitor_update_in_progress()
5108 /// Gets the latest [`ChannelMonitorUpdate`] ID which has been released and is in-flight.
5109 pub fn get_latest_unblocked_monitor_update_id(&self) -> u64 {
5110 if self.context.blocked_monitor_updates.is_empty() { return self.context.get_latest_monitor_update_id(); }
5111 self.context.blocked_monitor_updates[0].update.update_id - 1
5114 /// Returns the next blocked monitor update, if one exists, and a bool which indicates a
5115 /// further blocked monitor update exists after the next.
5116 pub fn unblock_next_blocked_monitor_update(&mut self) -> Option<(ChannelMonitorUpdate, bool)> {
5117 if self.context.blocked_monitor_updates.is_empty() { return None; }
5118 Some((self.context.blocked_monitor_updates.remove(0).update,
5119 !self.context.blocked_monitor_updates.is_empty()))
5122 /// Pushes a new monitor update into our monitor update queue, returning it if it should be
5123 /// immediately given to the user for persisting or `None` if it should be held as blocked.
5124 fn push_ret_blockable_mon_update(&mut self, update: ChannelMonitorUpdate)
5125 -> Option<ChannelMonitorUpdate> {
5126 let release_monitor = self.context.blocked_monitor_updates.is_empty();
5127 if !release_monitor {
5128 self.context.blocked_monitor_updates.push(PendingChannelMonitorUpdate {
5137 pub fn blocked_monitor_updates_pending(&self) -> usize {
5138 self.context.blocked_monitor_updates.len()
5141 /// Returns true if the channel is awaiting the persistence of the initial ChannelMonitor.
5142 /// If the channel is outbound, this implies we have not yet broadcasted the funding
5143 /// transaction. If the channel is inbound, this implies simply that the channel has not
5145 pub fn is_awaiting_initial_mon_persist(&self) -> bool {
5146 if !self.is_awaiting_monitor_update() { return false; }
5148 self.context.channel_state, ChannelState::AwaitingChannelReady(flags)
5149 if (flags & !(AwaitingChannelReadyFlags::THEIR_CHANNEL_READY | FundedStateFlags::PEER_DISCONNECTED | FundedStateFlags::MONITOR_UPDATE_IN_PROGRESS | AwaitingChannelReadyFlags::WAITING_FOR_BATCH)).is_empty()
5151 // If we're not a 0conf channel, we'll be waiting on a monitor update with only
5152 // AwaitingChannelReady set, though our peer could have sent their channel_ready.
5153 debug_assert!(self.context.minimum_depth.unwrap_or(1) > 0);
5156 if self.context.cur_holder_commitment_transaction_number == INITIAL_COMMITMENT_NUMBER - 1 &&
5157 self.context.cur_counterparty_commitment_transaction_number == INITIAL_COMMITMENT_NUMBER - 1 {
5158 // If we're a 0-conf channel, we'll move beyond AwaitingChannelReady immediately even while
5159 // waiting for the initial monitor persistence. Thus, we check if our commitment
5160 // transaction numbers have both been iterated only exactly once (for the
5161 // funding_signed), and we're awaiting monitor update.
5163 // If we got here, we shouldn't have yet broadcasted the funding transaction (as the
5164 // only way to get an awaiting-monitor-update state during initial funding is if the
5165 // initial monitor persistence is still pending).
5167 // Because deciding we're awaiting initial broadcast spuriously could result in
5168 // funds-loss (as we don't have a monitor, but have the funding transaction confirmed),
5169 // we hard-assert here, even in production builds.
5170 if self.context.is_outbound() { assert!(self.context.funding_transaction.is_some()); }
5171 assert!(self.context.monitor_pending_channel_ready);
5172 assert_eq!(self.context.latest_monitor_update_id, 0);
5178 /// Returns true if our channel_ready has been sent
5179 pub fn is_our_channel_ready(&self) -> bool {
5180 matches!(self.context.channel_state, ChannelState::AwaitingChannelReady(flags) if flags.is_set(AwaitingChannelReadyFlags::OUR_CHANNEL_READY)) ||
5181 matches!(self.context.channel_state, ChannelState::ChannelReady(_))
5184 /// Returns true if our peer has either initiated or agreed to shut down the channel.
5185 pub fn received_shutdown(&self) -> bool {
5186 self.context.channel_state.is_remote_shutdown_sent()
5189 /// Returns true if we either initiated or agreed to shut down the channel.
5190 pub fn sent_shutdown(&self) -> bool {
5191 self.context.channel_state.is_local_shutdown_sent()
5194 /// Returns true if this channel is fully shut down. True here implies that no further actions
5195 /// may/will be taken on this channel, and thus this object should be freed. Any future changes
5196 /// will be handled appropriately by the chain monitor.
5197 pub fn is_shutdown(&self) -> bool {
5198 matches!(self.context.channel_state, ChannelState::ShutdownComplete)
5201 pub fn channel_update_status(&self) -> ChannelUpdateStatus {
5202 self.context.channel_update_status
5205 pub fn set_channel_update_status(&mut self, status: ChannelUpdateStatus) {
5206 self.context.update_time_counter += 1;
5207 self.context.channel_update_status = status;
5210 fn check_get_channel_ready(&mut self, height: u32) -> Option<msgs::ChannelReady> {
5212 // * always when a new block/transactions are confirmed with the new height
5213 // * when funding is signed with a height of 0
5214 if self.context.funding_tx_confirmation_height == 0 && self.context.minimum_depth != Some(0) {
5218 let funding_tx_confirmations = height as i64 - self.context.funding_tx_confirmation_height as i64 + 1;
5219 if funding_tx_confirmations <= 0 {
5220 self.context.funding_tx_confirmation_height = 0;
5223 if funding_tx_confirmations < self.context.minimum_depth.unwrap_or(0) as i64 {
5227 // If we're still pending the signature on a funding transaction, then we're not ready to send a
5228 // channel_ready yet.
5229 if self.context.signer_pending_funding {
5233 // Note that we don't include ChannelState::WaitingForBatch as we don't want to send
5234 // channel_ready until the entire batch is ready.
5235 let need_commitment_update = if matches!(self.context.channel_state, ChannelState::AwaitingChannelReady(f) if (f & !FundedStateFlags::ALL).is_empty()) {
5236 self.context.channel_state.set_our_channel_ready();
5238 } else if matches!(self.context.channel_state, ChannelState::AwaitingChannelReady(f) if f & !FundedStateFlags::ALL == AwaitingChannelReadyFlags::THEIR_CHANNEL_READY) {
5239 self.context.channel_state = ChannelState::ChannelReady(self.context.channel_state.with_funded_state_flags_mask().into());
5240 self.context.update_time_counter += 1;
5242 } else if matches!(self.context.channel_state, ChannelState::AwaitingChannelReady(f) if f & !FundedStateFlags::ALL == AwaitingChannelReadyFlags::OUR_CHANNEL_READY) {
5243 // We got a reorg but not enough to trigger a force close, just ignore.
5246 if self.context.funding_tx_confirmation_height != 0 &&
5247 self.context.channel_state < ChannelState::ChannelReady(ChannelReadyFlags::new())
5249 // We should never see a funding transaction on-chain until we've received
5250 // funding_signed (if we're an outbound channel), or seen funding_generated (if we're
5251 // an inbound channel - before that we have no known funding TXID). The fuzzer,
5252 // however, may do this and we shouldn't treat it as a bug.
5253 #[cfg(not(fuzzing))]
5254 panic!("Started confirming a channel in a state pre-AwaitingChannelReady: {}.\n\
5255 Do NOT broadcast a funding transaction manually - let LDK do it for you!",
5256 self.context.channel_state.to_u32());
5258 // We got a reorg but not enough to trigger a force close, just ignore.
5262 if need_commitment_update {
5263 if !self.context.channel_state.is_monitor_update_in_progress() {
5264 if !self.context.channel_state.is_peer_disconnected() {
5265 let next_per_commitment_point =
5266 self.context.holder_signer.as_ref().get_per_commitment_point(INITIAL_COMMITMENT_NUMBER - 1, &self.context.secp_ctx);
5267 return Some(msgs::ChannelReady {
5268 channel_id: self.context.channel_id,
5269 next_per_commitment_point,
5270 short_channel_id_alias: Some(self.context.outbound_scid_alias),
5274 self.context.monitor_pending_channel_ready = true;
5280 /// When a transaction is confirmed, we check whether it is or spends the funding transaction
5281 /// In the first case, we store the confirmation height and calculating the short channel id.
5282 /// In the second, we simply return an Err indicating we need to be force-closed now.
5283 pub fn transactions_confirmed<NS: Deref, L: Deref>(
5284 &mut self, block_hash: &BlockHash, height: u32, txdata: &TransactionData,
5285 chain_hash: ChainHash, node_signer: &NS, user_config: &UserConfig, logger: &L
5286 ) -> Result<(Option<msgs::ChannelReady>, Option<msgs::AnnouncementSignatures>), ClosureReason>
5288 NS::Target: NodeSigner,
5291 let mut msgs = (None, None);
5292 if let Some(funding_txo) = self.context.get_funding_txo() {
5293 for &(index_in_block, tx) in txdata.iter() {
5294 // Check if the transaction is the expected funding transaction, and if it is,
5295 // check that it pays the right amount to the right script.
5296 if self.context.funding_tx_confirmation_height == 0 {
5297 if tx.txid() == funding_txo.txid {
5298 let txo_idx = funding_txo.index as usize;
5299 if txo_idx >= tx.output.len() || tx.output[txo_idx].script_pubkey != self.context.get_funding_redeemscript().to_v0_p2wsh() ||
5300 tx.output[txo_idx].value != self.context.channel_value_satoshis {
5301 if self.context.is_outbound() {
5302 // If we generated the funding transaction and it doesn't match what it
5303 // should, the client is really broken and we should just panic and
5304 // tell them off. That said, because hash collisions happen with high
5305 // probability in fuzzing mode, if we're fuzzing we just close the
5306 // channel and move on.
5307 #[cfg(not(fuzzing))]
5308 panic!("Client called ChannelManager::funding_transaction_generated with bogus transaction!");
5310 self.context.update_time_counter += 1;
5311 let err_reason = "funding tx had wrong script/value or output index";
5312 return Err(ClosureReason::ProcessingError { err: err_reason.to_owned() });
5314 if self.context.is_outbound() {
5315 if !tx.is_coin_base() {
5316 for input in tx.input.iter() {
5317 if input.witness.is_empty() {
5318 // We generated a malleable funding transaction, implying we've
5319 // just exposed ourselves to funds loss to our counterparty.
5320 #[cfg(not(fuzzing))]
5321 panic!("Client called ChannelManager::funding_transaction_generated with bogus transaction!");
5326 self.context.funding_tx_confirmation_height = height;
5327 self.context.funding_tx_confirmed_in = Some(*block_hash);
5328 self.context.short_channel_id = match scid_from_parts(height as u64, index_in_block as u64, txo_idx as u64) {
5329 Ok(scid) => Some(scid),
5330 Err(_) => panic!("Block was bogus - either height was > 16 million, had > 16 million transactions, or had > 65k outputs"),
5333 // If this is a coinbase transaction and not a 0-conf channel
5334 // we should update our min_depth to 100 to handle coinbase maturity
5335 if tx.is_coin_base() &&
5336 self.context.minimum_depth.unwrap_or(0) > 0 &&
5337 self.context.minimum_depth.unwrap_or(0) < COINBASE_MATURITY {
5338 self.context.minimum_depth = Some(COINBASE_MATURITY);
5341 // If we allow 1-conf funding, we may need to check for channel_ready here and
5342 // send it immediately instead of waiting for a best_block_updated call (which
5343 // may have already happened for this block).
5344 if let Some(channel_ready) = self.check_get_channel_ready(height) {
5345 log_info!(logger, "Sending a channel_ready to our peer for channel {}", &self.context.channel_id);
5346 let announcement_sigs = self.get_announcement_sigs(node_signer, chain_hash, user_config, height, logger);
5347 msgs = (Some(channel_ready), announcement_sigs);
5350 for inp in tx.input.iter() {
5351 if inp.previous_output == funding_txo.into_bitcoin_outpoint() {
5352 log_info!(logger, "Detected channel-closing tx {} spending {}:{}, closing channel {}", tx.txid(), inp.previous_output.txid, inp.previous_output.vout, &self.context.channel_id());
5353 return Err(ClosureReason::CommitmentTxConfirmed);
5361 /// When a new block is connected, we check the height of the block against outbound holding
5362 /// cell HTLCs in case we need to give up on them prematurely and time them out. Everything
5363 /// else (e.g. commitment transaction broadcasts, HTLC transaction broadcasting, etc) is
5364 /// handled by the ChannelMonitor.
5366 /// If we return Err, the channel may have been closed, at which point the standard
5367 /// requirements apply - no calls may be made except those explicitly stated to be allowed
5370 /// May return some HTLCs (and their payment_hash) which have timed out and should be failed
5372 pub fn best_block_updated<NS: Deref, L: Deref>(
5373 &mut self, height: u32, highest_header_time: u32, chain_hash: ChainHash,
5374 node_signer: &NS, user_config: &UserConfig, logger: &L
5375 ) -> Result<(Option<msgs::ChannelReady>, Vec<(HTLCSource, PaymentHash)>, Option<msgs::AnnouncementSignatures>), ClosureReason>
5377 NS::Target: NodeSigner,
5380 self.do_best_block_updated(height, highest_header_time, Some((chain_hash, node_signer, user_config)), logger)
5383 fn do_best_block_updated<NS: Deref, L: Deref>(
5384 &mut self, height: u32, highest_header_time: u32,
5385 chain_node_signer: Option<(ChainHash, &NS, &UserConfig)>, logger: &L
5386 ) -> Result<(Option<msgs::ChannelReady>, Vec<(HTLCSource, PaymentHash)>, Option<msgs::AnnouncementSignatures>), ClosureReason>
5388 NS::Target: NodeSigner,
5391 let mut timed_out_htlcs = Vec::new();
5392 // This mirrors the check in ChannelManager::decode_update_add_htlc_onion, refusing to
5393 // forward an HTLC when our counterparty should almost certainly just fail it for expiring
5395 let unforwarded_htlc_cltv_limit = height + LATENCY_GRACE_PERIOD_BLOCKS;
5396 self.context.holding_cell_htlc_updates.retain(|htlc_update| {
5398 &HTLCUpdateAwaitingACK::AddHTLC { ref payment_hash, ref source, ref cltv_expiry, .. } => {
5399 if *cltv_expiry <= unforwarded_htlc_cltv_limit {
5400 timed_out_htlcs.push((source.clone(), payment_hash.clone()));
5408 self.context.update_time_counter = cmp::max(self.context.update_time_counter, highest_header_time);
5410 if let Some(channel_ready) = self.check_get_channel_ready(height) {
5411 let announcement_sigs = if let Some((chain_hash, node_signer, user_config)) = chain_node_signer {
5412 self.get_announcement_sigs(node_signer, chain_hash, user_config, height, logger)
5414 log_info!(logger, "Sending a channel_ready to our peer for channel {}", &self.context.channel_id);
5415 return Ok((Some(channel_ready), timed_out_htlcs, announcement_sigs));
5418 if matches!(self.context.channel_state, ChannelState::ChannelReady(_)) ||
5419 self.context.channel_state.is_our_channel_ready() {
5420 let mut funding_tx_confirmations = height as i64 - self.context.funding_tx_confirmation_height as i64 + 1;
5421 if self.context.funding_tx_confirmation_height == 0 {
5422 // Note that check_get_channel_ready may reset funding_tx_confirmation_height to
5423 // zero if it has been reorged out, however in either case, our state flags
5424 // indicate we've already sent a channel_ready
5425 funding_tx_confirmations = 0;
5428 // If we've sent channel_ready (or have both sent and received channel_ready), and
5429 // the funding transaction has become unconfirmed,
5430 // close the channel and hope we can get the latest state on chain (because presumably
5431 // the funding transaction is at least still in the mempool of most nodes).
5433 // Note that ideally we wouldn't force-close if we see *any* reorg on a 1-conf or
5434 // 0-conf channel, but not doing so may lead to the
5435 // `ChannelManager::short_to_chan_info` map being inconsistent, so we currently have
5437 if funding_tx_confirmations == 0 && self.context.funding_tx_confirmed_in.is_some() {
5438 let err_reason = format!("Funding transaction was un-confirmed. Locked at {} confs, now have {} confs.",
5439 self.context.minimum_depth.unwrap(), funding_tx_confirmations);
5440 return Err(ClosureReason::ProcessingError { err: err_reason });
5442 } else if !self.context.is_outbound() && self.context.funding_tx_confirmed_in.is_none() &&
5443 height >= self.context.channel_creation_height + FUNDING_CONF_DEADLINE_BLOCKS {
5444 log_info!(logger, "Closing channel {} due to funding timeout", &self.context.channel_id);
5445 // If funding_tx_confirmed_in is unset, the channel must not be active
5446 assert!(self.context.channel_state <= ChannelState::ChannelReady(ChannelReadyFlags::new()));
5447 assert!(!self.context.channel_state.is_our_channel_ready());
5448 return Err(ClosureReason::FundingTimedOut);
5451 let announcement_sigs = if let Some((chain_hash, node_signer, user_config)) = chain_node_signer {
5452 self.get_announcement_sigs(node_signer, chain_hash, user_config, height, logger)
5454 Ok((None, timed_out_htlcs, announcement_sigs))
5457 /// Indicates the funding transaction is no longer confirmed in the main chain. This may
5458 /// force-close the channel, but may also indicate a harmless reorganization of a block or two
5459 /// before the channel has reached channel_ready and we can just wait for more blocks.
5460 pub fn funding_transaction_unconfirmed<L: Deref>(&mut self, logger: &L) -> Result<(), ClosureReason> where L::Target: Logger {
5461 if self.context.funding_tx_confirmation_height != 0 {
5462 // We handle the funding disconnection by calling best_block_updated with a height one
5463 // below where our funding was connected, implying a reorg back to conf_height - 1.
5464 let reorg_height = self.context.funding_tx_confirmation_height - 1;
5465 // We use the time field to bump the current time we set on channel updates if its
5466 // larger. If we don't know that time has moved forward, we can just set it to the last
5467 // time we saw and it will be ignored.
5468 let best_time = self.context.update_time_counter;
5469 match self.do_best_block_updated(reorg_height, best_time, None::<(ChainHash, &&dyn NodeSigner, &UserConfig)>, logger) {
5470 Ok((channel_ready, timed_out_htlcs, announcement_sigs)) => {
5471 assert!(channel_ready.is_none(), "We can't generate a funding with 0 confirmations?");
5472 assert!(timed_out_htlcs.is_empty(), "We can't have accepted HTLCs with a timeout before our funding confirmation?");
5473 assert!(announcement_sigs.is_none(), "We can't generate an announcement_sigs with 0 confirmations?");
5479 // We never learned about the funding confirmation anyway, just ignore
5484 // Methods to get unprompted messages to send to the remote end (or where we already returned
5485 // something in the handler for the message that prompted this message):
5487 /// Gets an UnsignedChannelAnnouncement for this channel. The channel must be publicly
5488 /// announceable and available for use (have exchanged [`ChannelReady`] messages in both
5489 /// directions). Should be used for both broadcasted announcements and in response to an
5490 /// AnnouncementSignatures message from the remote peer.
5492 /// Will only fail if we're not in a state where channel_announcement may be sent (including
5495 /// This will only return ChannelError::Ignore upon failure.
5497 /// [`ChannelReady`]: crate::ln::msgs::ChannelReady
5498 fn get_channel_announcement<NS: Deref>(
5499 &self, node_signer: &NS, chain_hash: ChainHash, user_config: &UserConfig,
5500 ) -> Result<msgs::UnsignedChannelAnnouncement, ChannelError> where NS::Target: NodeSigner {
5501 if !self.context.config.announced_channel {
5502 return Err(ChannelError::Ignore("Channel is not available for public announcements".to_owned()));
5504 if !self.context.is_usable() {
5505 return Err(ChannelError::Ignore("Cannot get a ChannelAnnouncement if the channel is not currently usable".to_owned()));
5508 let short_channel_id = self.context.get_short_channel_id()
5509 .ok_or(ChannelError::Ignore("Cannot get a ChannelAnnouncement if the channel has not been confirmed yet".to_owned()))?;
5510 let node_id = NodeId::from_pubkey(&node_signer.get_node_id(Recipient::Node)
5511 .map_err(|_| ChannelError::Ignore("Failed to retrieve own public key".to_owned()))?);
5512 let counterparty_node_id = NodeId::from_pubkey(&self.context.get_counterparty_node_id());
5513 let were_node_one = node_id.as_slice() < counterparty_node_id.as_slice();
5515 let msg = msgs::UnsignedChannelAnnouncement {
5516 features: channelmanager::provided_channel_features(&user_config),
5519 node_id_1: if were_node_one { node_id } else { counterparty_node_id },
5520 node_id_2: if were_node_one { counterparty_node_id } else { node_id },
5521 bitcoin_key_1: NodeId::from_pubkey(if were_node_one { &self.context.get_holder_pubkeys().funding_pubkey } else { self.context.counterparty_funding_pubkey() }),
5522 bitcoin_key_2: NodeId::from_pubkey(if were_node_one { self.context.counterparty_funding_pubkey() } else { &self.context.get_holder_pubkeys().funding_pubkey }),
5523 excess_data: Vec::new(),
5529 fn get_announcement_sigs<NS: Deref, L: Deref>(
5530 &mut self, node_signer: &NS, chain_hash: ChainHash, user_config: &UserConfig,
5531 best_block_height: u32, logger: &L
5532 ) -> Option<msgs::AnnouncementSignatures>
5534 NS::Target: NodeSigner,
5537 if self.context.funding_tx_confirmation_height == 0 || self.context.funding_tx_confirmation_height + 5 > best_block_height {
5541 if !self.context.is_usable() {
5545 if self.context.channel_state.is_peer_disconnected() {
5546 log_trace!(logger, "Cannot create an announcement_signatures as our peer is disconnected");
5550 if self.context.announcement_sigs_state != AnnouncementSigsState::NotSent {
5554 log_trace!(logger, "Creating an announcement_signatures message for channel {}", &self.context.channel_id());
5555 let announcement = match self.get_channel_announcement(node_signer, chain_hash, user_config) {
5558 log_trace!(logger, "{:?}", e);
5562 let our_node_sig = match node_signer.sign_gossip_message(msgs::UnsignedGossipMessage::ChannelAnnouncement(&announcement)) {
5564 log_error!(logger, "Failed to generate node signature for channel_announcement. Channel will not be announced!");
5569 match &self.context.holder_signer {
5570 ChannelSignerType::Ecdsa(ecdsa) => {
5571 let our_bitcoin_sig = match ecdsa.sign_channel_announcement_with_funding_key(&announcement, &self.context.secp_ctx) {
5573 log_error!(logger, "Signer rejected channel_announcement signing. Channel will not be announced!");
5578 let short_channel_id = match self.context.get_short_channel_id() {
5580 None => return None,
5583 self.context.announcement_sigs_state = AnnouncementSigsState::MessageSent;
5585 Some(msgs::AnnouncementSignatures {
5586 channel_id: self.context.channel_id(),
5588 node_signature: our_node_sig,
5589 bitcoin_signature: our_bitcoin_sig,
5592 // TODO (taproot|arik)
5598 /// Signs the given channel announcement, returning a ChannelError::Ignore if no keys are
5600 fn sign_channel_announcement<NS: Deref>(
5601 &self, node_signer: &NS, announcement: msgs::UnsignedChannelAnnouncement
5602 ) -> Result<msgs::ChannelAnnouncement, ChannelError> where NS::Target: NodeSigner {
5603 if let Some((their_node_sig, their_bitcoin_sig)) = self.context.announcement_sigs {
5604 let our_node_key = NodeId::from_pubkey(&node_signer.get_node_id(Recipient::Node)
5605 .map_err(|_| ChannelError::Ignore("Signer failed to retrieve own public key".to_owned()))?);
5606 let were_node_one = announcement.node_id_1 == our_node_key;
5608 let our_node_sig = node_signer.sign_gossip_message(msgs::UnsignedGossipMessage::ChannelAnnouncement(&announcement))
5609 .map_err(|_| ChannelError::Ignore("Failed to generate node signature for channel_announcement".to_owned()))?;
5610 match &self.context.holder_signer {
5611 ChannelSignerType::Ecdsa(ecdsa) => {
5612 let our_bitcoin_sig = ecdsa.sign_channel_announcement_with_funding_key(&announcement, &self.context.secp_ctx)
5613 .map_err(|_| ChannelError::Ignore("Signer rejected channel_announcement".to_owned()))?;
5614 Ok(msgs::ChannelAnnouncement {
5615 node_signature_1: if were_node_one { our_node_sig } else { their_node_sig },
5616 node_signature_2: if were_node_one { their_node_sig } else { our_node_sig },
5617 bitcoin_signature_1: if were_node_one { our_bitcoin_sig } else { their_bitcoin_sig },
5618 bitcoin_signature_2: if were_node_one { their_bitcoin_sig } else { our_bitcoin_sig },
5619 contents: announcement,
5622 // TODO (taproot|arik)
5627 Err(ChannelError::Ignore("Attempted to sign channel announcement before we'd received announcement_signatures".to_string()))
5631 /// Processes an incoming announcement_signatures message, providing a fully-signed
5632 /// channel_announcement message which we can broadcast and storing our counterparty's
5633 /// signatures for later reconstruction/rebroadcast of the channel_announcement.
5634 pub fn announcement_signatures<NS: Deref>(
5635 &mut self, node_signer: &NS, chain_hash: ChainHash, best_block_height: u32,
5636 msg: &msgs::AnnouncementSignatures, user_config: &UserConfig
5637 ) -> Result<msgs::ChannelAnnouncement, ChannelError> where NS::Target: NodeSigner {
5638 let announcement = self.get_channel_announcement(node_signer, chain_hash, user_config)?;
5640 let msghash = hash_to_message!(&Sha256d::hash(&announcement.encode()[..])[..]);
5642 if self.context.secp_ctx.verify_ecdsa(&msghash, &msg.node_signature, &self.context.get_counterparty_node_id()).is_err() {
5643 return Err(ChannelError::Close(format!(
5644 "Bad announcement_signatures. Failed to verify node_signature. UnsignedChannelAnnouncement used for verification is {:?}. their_node_key is {:?}",
5645 &announcement, self.context.get_counterparty_node_id())));
5647 if self.context.secp_ctx.verify_ecdsa(&msghash, &msg.bitcoin_signature, self.context.counterparty_funding_pubkey()).is_err() {
5648 return Err(ChannelError::Close(format!(
5649 "Bad announcement_signatures. Failed to verify bitcoin_signature. UnsignedChannelAnnouncement used for verification is {:?}. their_bitcoin_key is ({:?})",
5650 &announcement, self.context.counterparty_funding_pubkey())));
5653 self.context.announcement_sigs = Some((msg.node_signature, msg.bitcoin_signature));
5654 if self.context.funding_tx_confirmation_height == 0 || self.context.funding_tx_confirmation_height + 5 > best_block_height {
5655 return Err(ChannelError::Ignore(
5656 "Got announcement_signatures prior to the required six confirmations - we may not have received a block yet that our peer has".to_owned()));
5659 self.sign_channel_announcement(node_signer, announcement)
5662 /// Gets a signed channel_announcement for this channel, if we previously received an
5663 /// announcement_signatures from our counterparty.
5664 pub fn get_signed_channel_announcement<NS: Deref>(
5665 &self, node_signer: &NS, chain_hash: ChainHash, best_block_height: u32, user_config: &UserConfig
5666 ) -> Option<msgs::ChannelAnnouncement> where NS::Target: NodeSigner {
5667 if self.context.funding_tx_confirmation_height == 0 || self.context.funding_tx_confirmation_height + 5 > best_block_height {
5670 let announcement = match self.get_channel_announcement(node_signer, chain_hash, user_config) {
5672 Err(_) => return None,
5674 match self.sign_channel_announcement(node_signer, announcement) {
5675 Ok(res) => Some(res),
5680 /// May panic if called on a channel that wasn't immediately-previously
5681 /// self.remove_uncommitted_htlcs_and_mark_paused()'d
5682 pub fn get_channel_reestablish<L: Deref>(&mut self, logger: &L) -> msgs::ChannelReestablish where L::Target: Logger {
5683 assert!(self.context.channel_state.is_peer_disconnected());
5684 assert_ne!(self.context.cur_counterparty_commitment_transaction_number, INITIAL_COMMITMENT_NUMBER);
5685 // Prior to static_remotekey, my_current_per_commitment_point was critical to claiming
5686 // current to_remote balances. However, it no longer has any use, and thus is now simply
5687 // set to a dummy (but valid, as required by the spec) public key.
5688 // fuzzing mode marks a subset of pubkeys as invalid so that we can hit "invalid pubkey"
5689 // branches, but we unwrap it below, so we arbitrarily select a dummy pubkey which is both
5690 // valid, and valid in fuzzing mode's arbitrary validity criteria:
5691 let mut pk = [2; 33]; pk[1] = 0xff;
5692 let dummy_pubkey = PublicKey::from_slice(&pk).unwrap();
5693 let remote_last_secret = if self.context.cur_counterparty_commitment_transaction_number + 1 < INITIAL_COMMITMENT_NUMBER {
5694 let remote_last_secret = self.context.commitment_secrets.get_secret(self.context.cur_counterparty_commitment_transaction_number + 2).unwrap();
5695 log_trace!(logger, "Enough info to generate a Data Loss Protect with per_commitment_secret {} for channel {}", log_bytes!(remote_last_secret), &self.context.channel_id());
5698 log_info!(logger, "Sending a data_loss_protect with no previous remote per_commitment_secret for channel {}", &self.context.channel_id());
5701 self.mark_awaiting_response();
5702 msgs::ChannelReestablish {
5703 channel_id: self.context.channel_id(),
5704 // The protocol has two different commitment number concepts - the "commitment
5705 // transaction number", which starts from 0 and counts up, and the "revocation key
5706 // index" which starts at INITIAL_COMMITMENT_NUMBER and counts down. We track
5707 // commitment transaction numbers by the index which will be used to reveal the
5708 // revocation key for that commitment transaction, which means we have to convert them
5709 // to protocol-level commitment numbers here...
5711 // next_local_commitment_number is the next commitment_signed number we expect to
5712 // receive (indicating if they need to resend one that we missed).
5713 next_local_commitment_number: INITIAL_COMMITMENT_NUMBER - self.context.cur_holder_commitment_transaction_number,
5714 // We have to set next_remote_commitment_number to the next revoke_and_ack we expect to
5715 // receive, however we track it by the next commitment number for a remote transaction
5716 // (which is one further, as they always revoke previous commitment transaction, not
5717 // the one we send) so we have to decrement by 1. Note that if
5718 // cur_counterparty_commitment_transaction_number is INITIAL_COMMITMENT_NUMBER we will have
5719 // dropped this channel on disconnect as it hasn't yet reached AwaitingChannelReady so we can't
5721 next_remote_commitment_number: INITIAL_COMMITMENT_NUMBER - self.context.cur_counterparty_commitment_transaction_number - 1,
5722 your_last_per_commitment_secret: remote_last_secret,
5723 my_current_per_commitment_point: dummy_pubkey,
5724 // TODO(dual_funding): If we've sent `commtiment_signed` for an interactive transaction
5725 // construction but have not received `tx_signatures` we MUST set `next_funding_txid` to the
5726 // txid of that interactive transaction, else we MUST NOT set it.
5727 next_funding_txid: None,
5732 // Send stuff to our remote peers:
5734 /// Queues up an outbound HTLC to send by placing it in the holding cell. You should call
5735 /// [`Self::maybe_free_holding_cell_htlcs`] in order to actually generate and send the
5736 /// commitment update.
5738 /// `Err`s will only be [`ChannelError::Ignore`].
5739 pub fn queue_add_htlc<F: Deref, L: Deref>(
5740 &mut self, amount_msat: u64, payment_hash: PaymentHash, cltv_expiry: u32, source: HTLCSource,
5741 onion_routing_packet: msgs::OnionPacket, skimmed_fee_msat: Option<u64>,
5742 blinding_point: Option<PublicKey>, fee_estimator: &LowerBoundedFeeEstimator<F>, logger: &L
5743 ) -> Result<(), ChannelError>
5744 where F::Target: FeeEstimator, L::Target: Logger
5747 .send_htlc(amount_msat, payment_hash, cltv_expiry, source, onion_routing_packet, true,
5748 skimmed_fee_msat, blinding_point, fee_estimator, logger)
5749 .map(|msg_opt| assert!(msg_opt.is_none(), "We forced holding cell?"))
5751 if let ChannelError::Ignore(_) = err { /* fine */ }
5752 else { debug_assert!(false, "Queueing cannot trigger channel failure"); }
5757 /// Adds a pending outbound HTLC to this channel, note that you probably want
5758 /// [`Self::send_htlc_and_commit`] instead cause you'll want both messages at once.
5760 /// This returns an optional UpdateAddHTLC as we may be in a state where we cannot add HTLCs on
5762 /// * In cases where we're waiting on the remote peer to send us a revoke_and_ack, we
5763 /// wouldn't be able to determine what they actually ACK'ed if we have two sets of updates
5765 /// * In cases where we're marked MonitorUpdateInProgress, we cannot commit to a new state as
5766 /// we may not yet have sent the previous commitment update messages and will need to
5767 /// regenerate them.
5769 /// You MUST call [`Self::send_commitment_no_state_update`] prior to calling any other methods
5770 /// on this [`Channel`] if `force_holding_cell` is false.
5772 /// `Err`s will only be [`ChannelError::Ignore`].
5773 fn send_htlc<F: Deref, L: Deref>(
5774 &mut self, amount_msat: u64, payment_hash: PaymentHash, cltv_expiry: u32, source: HTLCSource,
5775 onion_routing_packet: msgs::OnionPacket, mut force_holding_cell: bool,
5776 skimmed_fee_msat: Option<u64>, blinding_point: Option<PublicKey>,
5777 fee_estimator: &LowerBoundedFeeEstimator<F>, logger: &L
5778 ) -> Result<Option<msgs::UpdateAddHTLC>, ChannelError>
5779 where F::Target: FeeEstimator, L::Target: Logger
5781 if !matches!(self.context.channel_state, ChannelState::ChannelReady(_)) ||
5782 self.context.channel_state.is_local_shutdown_sent() ||
5783 self.context.channel_state.is_remote_shutdown_sent()
5785 return Err(ChannelError::Ignore("Cannot send HTLC until channel is fully established and we haven't started shutting down".to_owned()));
5787 let channel_total_msat = self.context.channel_value_satoshis * 1000;
5788 if amount_msat > channel_total_msat {
5789 return Err(ChannelError::Ignore(format!("Cannot send amount {}, because it is more than the total value of the channel {}", amount_msat, channel_total_msat)));
5792 if amount_msat == 0 {
5793 return Err(ChannelError::Ignore("Cannot send 0-msat HTLC".to_owned()));
5796 let available_balances = self.context.get_available_balances(fee_estimator);
5797 if amount_msat < available_balances.next_outbound_htlc_minimum_msat {
5798 return Err(ChannelError::Ignore(format!("Cannot send less than our next-HTLC minimum - {} msat",
5799 available_balances.next_outbound_htlc_minimum_msat)));
5802 if amount_msat > available_balances.next_outbound_htlc_limit_msat {
5803 return Err(ChannelError::Ignore(format!("Cannot send more than our next-HTLC maximum - {} msat",
5804 available_balances.next_outbound_htlc_limit_msat)));
5807 if self.context.channel_state.is_peer_disconnected() {
5808 // Note that this should never really happen, if we're !is_live() on receipt of an
5809 // incoming HTLC for relay will result in us rejecting the HTLC and we won't allow
5810 // the user to send directly into a !is_live() channel. However, if we
5811 // disconnected during the time the previous hop was doing the commitment dance we may
5812 // end up getting here after the forwarding delay. In any case, returning an
5813 // IgnoreError will get ChannelManager to do the right thing and fail backwards now.
5814 return Err(ChannelError::Ignore("Cannot send an HTLC while disconnected from channel counterparty".to_owned()));
5817 let need_holding_cell = self.context.channel_state.should_force_holding_cell();
5818 log_debug!(logger, "Pushing new outbound HTLC with hash {} for {} msat {}",
5819 payment_hash, amount_msat,
5820 if force_holding_cell { "into holding cell" }
5821 else if need_holding_cell { "into holding cell as we're awaiting an RAA or monitor" }
5822 else { "to peer" });
5824 if need_holding_cell {
5825 force_holding_cell = true;
5828 // Now update local state:
5829 if force_holding_cell {
5830 self.context.holding_cell_htlc_updates.push(HTLCUpdateAwaitingACK::AddHTLC {
5835 onion_routing_packet,
5842 self.context.pending_outbound_htlcs.push(OutboundHTLCOutput {
5843 htlc_id: self.context.next_holder_htlc_id,
5845 payment_hash: payment_hash.clone(),
5847 state: OutboundHTLCState::LocalAnnounced(Box::new(onion_routing_packet.clone())),
5853 let res = msgs::UpdateAddHTLC {
5854 channel_id: self.context.channel_id,
5855 htlc_id: self.context.next_holder_htlc_id,
5859 onion_routing_packet,
5863 self.context.next_holder_htlc_id += 1;
5868 fn build_commitment_no_status_check<L: Deref>(&mut self, logger: &L) -> ChannelMonitorUpdate where L::Target: Logger {
5869 log_trace!(logger, "Updating HTLC state for a newly-sent commitment_signed...");
5870 // We can upgrade the status of some HTLCs that are waiting on a commitment, even if we
5871 // fail to generate this, we still are at least at a position where upgrading their status
5873 for htlc in self.context.pending_inbound_htlcs.iter_mut() {
5874 let new_state = if let &InboundHTLCState::AwaitingRemoteRevokeToAnnounce(ref forward_info) = &htlc.state {
5875 Some(InboundHTLCState::AwaitingAnnouncedRemoteRevoke(forward_info.clone()))
5877 if let Some(state) = new_state {
5878 log_trace!(logger, " ...promoting inbound AwaitingRemoteRevokeToAnnounce {} to AwaitingAnnouncedRemoteRevoke", &htlc.payment_hash);
5882 for htlc in self.context.pending_outbound_htlcs.iter_mut() {
5883 if let &mut OutboundHTLCState::AwaitingRemoteRevokeToRemove(ref mut outcome) = &mut htlc.state {
5884 log_trace!(logger, " ...promoting outbound AwaitingRemoteRevokeToRemove {} to AwaitingRemovedRemoteRevoke", &htlc.payment_hash);
5885 // Grab the preimage, if it exists, instead of cloning
5886 let mut reason = OutboundHTLCOutcome::Success(None);
5887 mem::swap(outcome, &mut reason);
5888 htlc.state = OutboundHTLCState::AwaitingRemovedRemoteRevoke(reason);
5891 if let Some((feerate, update_state)) = self.context.pending_update_fee {
5892 if update_state == FeeUpdateState::AwaitingRemoteRevokeToAnnounce {
5893 debug_assert!(!self.context.is_outbound());
5894 log_trace!(logger, " ...promoting inbound AwaitingRemoteRevokeToAnnounce fee update {} to Committed", feerate);
5895 self.context.feerate_per_kw = feerate;
5896 self.context.pending_update_fee = None;
5899 self.context.resend_order = RAACommitmentOrder::RevokeAndACKFirst;
5901 let (mut htlcs_ref, counterparty_commitment_tx) =
5902 self.build_commitment_no_state_update(logger);
5903 let counterparty_commitment_txid = counterparty_commitment_tx.trust().txid();
5904 let htlcs: Vec<(HTLCOutputInCommitment, Option<Box<HTLCSource>>)> =
5905 htlcs_ref.drain(..).map(|(htlc, htlc_source)| (htlc, htlc_source.map(|source_ref| Box::new(source_ref.clone())))).collect();
5907 if self.context.announcement_sigs_state == AnnouncementSigsState::MessageSent {
5908 self.context.announcement_sigs_state = AnnouncementSigsState::Committed;
5911 self.context.latest_monitor_update_id += 1;
5912 let monitor_update = ChannelMonitorUpdate {
5913 update_id: self.context.latest_monitor_update_id,
5914 updates: vec![ChannelMonitorUpdateStep::LatestCounterpartyCommitmentTXInfo {
5915 commitment_txid: counterparty_commitment_txid,
5916 htlc_outputs: htlcs.clone(),
5917 commitment_number: self.context.cur_counterparty_commitment_transaction_number,
5918 their_per_commitment_point: self.context.counterparty_cur_commitment_point.unwrap(),
5919 feerate_per_kw: Some(counterparty_commitment_tx.feerate_per_kw()),
5920 to_broadcaster_value_sat: Some(counterparty_commitment_tx.to_broadcaster_value_sat()),
5921 to_countersignatory_value_sat: Some(counterparty_commitment_tx.to_countersignatory_value_sat()),
5924 self.context.channel_state.set_awaiting_remote_revoke();
5928 fn build_commitment_no_state_update<L: Deref>(&self, logger: &L)
5929 -> (Vec<(HTLCOutputInCommitment, Option<&HTLCSource>)>, CommitmentTransaction)
5930 where L::Target: Logger
5932 let counterparty_keys = self.context.build_remote_transaction_keys();
5933 let commitment_stats = self.context.build_commitment_transaction(self.context.cur_counterparty_commitment_transaction_number, &counterparty_keys, false, true, logger);
5934 let counterparty_commitment_tx = commitment_stats.tx;
5936 #[cfg(any(test, fuzzing))]
5938 if !self.context.is_outbound() {
5939 let projected_commit_tx_info = self.context.next_remote_commitment_tx_fee_info_cached.lock().unwrap().take();
5940 *self.context.next_local_commitment_tx_fee_info_cached.lock().unwrap() = None;
5941 if let Some(info) = projected_commit_tx_info {
5942 let total_pending_htlcs = self.context.pending_inbound_htlcs.len() + self.context.pending_outbound_htlcs.len();
5943 if info.total_pending_htlcs == total_pending_htlcs
5944 && info.next_holder_htlc_id == self.context.next_holder_htlc_id
5945 && info.next_counterparty_htlc_id == self.context.next_counterparty_htlc_id
5946 && info.feerate == self.context.feerate_per_kw {
5947 let actual_fee = commit_tx_fee_msat(self.context.feerate_per_kw, commitment_stats.num_nondust_htlcs, self.context.get_channel_type());
5948 assert_eq!(actual_fee, info.fee);
5954 (commitment_stats.htlcs_included, counterparty_commitment_tx)
5957 /// Only fails in case of signer rejection. Used for channel_reestablish commitment_signed
5958 /// generation when we shouldn't change HTLC/channel state.
5959 fn send_commitment_no_state_update<L: Deref>(&self, logger: &L) -> Result<(msgs::CommitmentSigned, (Txid, Vec<(HTLCOutputInCommitment, Option<&HTLCSource>)>)), ChannelError> where L::Target: Logger {
5960 // Get the fee tests from `build_commitment_no_state_update`
5961 #[cfg(any(test, fuzzing))]
5962 self.build_commitment_no_state_update(logger);
5964 let counterparty_keys = self.context.build_remote_transaction_keys();
5965 let commitment_stats = self.context.build_commitment_transaction(self.context.cur_counterparty_commitment_transaction_number, &counterparty_keys, false, true, logger);
5966 let counterparty_commitment_txid = commitment_stats.tx.trust().txid();
5968 match &self.context.holder_signer {
5969 ChannelSignerType::Ecdsa(ecdsa) => {
5970 let (signature, htlc_signatures);
5973 let mut htlcs = Vec::with_capacity(commitment_stats.htlcs_included.len());
5974 for &(ref htlc, _) in commitment_stats.htlcs_included.iter() {
5978 let res = ecdsa.sign_counterparty_commitment(
5979 &commitment_stats.tx,
5980 commitment_stats.inbound_htlc_preimages,
5981 commitment_stats.outbound_htlc_preimages,
5982 &self.context.secp_ctx,
5983 ).map_err(|_| ChannelError::Ignore("Failed to get signatures for new commitment_signed".to_owned()))?;
5985 htlc_signatures = res.1;
5987 log_trace!(logger, "Signed remote commitment tx {} (txid {}) with redeemscript {} -> {} in channel {}",
5988 encode::serialize_hex(&commitment_stats.tx.trust().built_transaction().transaction),
5989 &counterparty_commitment_txid, encode::serialize_hex(&self.context.get_funding_redeemscript()),
5990 log_bytes!(signature.serialize_compact()[..]), &self.context.channel_id());
5992 for (ref htlc_sig, ref htlc) in htlc_signatures.iter().zip(htlcs) {
5993 log_trace!(logger, "Signed remote HTLC tx {} with redeemscript {} with pubkey {} -> {} in channel {}",
5994 encode::serialize_hex(&chan_utils::build_htlc_transaction(&counterparty_commitment_txid, commitment_stats.feerate_per_kw, self.context.get_holder_selected_contest_delay(), htlc, &self.context.channel_type, &counterparty_keys.broadcaster_delayed_payment_key, &counterparty_keys.revocation_key)),
5995 encode::serialize_hex(&chan_utils::get_htlc_redeemscript(&htlc, &self.context.channel_type, &counterparty_keys)),
5996 log_bytes!(counterparty_keys.broadcaster_htlc_key.to_public_key().serialize()),
5997 log_bytes!(htlc_sig.serialize_compact()[..]), &self.context.channel_id());
6001 Ok((msgs::CommitmentSigned {
6002 channel_id: self.context.channel_id,
6006 partial_signature_with_nonce: None,
6007 }, (counterparty_commitment_txid, commitment_stats.htlcs_included)))
6009 // TODO (taproot|arik)
6015 /// Adds a pending outbound HTLC to this channel, and builds a new remote commitment
6016 /// transaction and generates the corresponding [`ChannelMonitorUpdate`] in one go.
6018 /// Shorthand for calling [`Self::send_htlc`] followed by a commitment update, see docs on
6019 /// [`Self::send_htlc`] and [`Self::build_commitment_no_state_update`] for more info.
6020 pub fn send_htlc_and_commit<F: Deref, L: Deref>(
6021 &mut self, amount_msat: u64, payment_hash: PaymentHash, cltv_expiry: u32,
6022 source: HTLCSource, onion_routing_packet: msgs::OnionPacket, skimmed_fee_msat: Option<u64>,
6023 fee_estimator: &LowerBoundedFeeEstimator<F>, logger: &L
6024 ) -> Result<Option<ChannelMonitorUpdate>, ChannelError>
6025 where F::Target: FeeEstimator, L::Target: Logger
6027 let send_res = self.send_htlc(amount_msat, payment_hash, cltv_expiry, source,
6028 onion_routing_packet, false, skimmed_fee_msat, None, fee_estimator, logger);
6029 if let Err(e) = &send_res { if let ChannelError::Ignore(_) = e {} else { debug_assert!(false, "Sending cannot trigger channel failure"); } }
6032 let monitor_update = self.build_commitment_no_status_check(logger);
6033 self.monitor_updating_paused(false, true, false, Vec::new(), Vec::new(), Vec::new());
6034 Ok(self.push_ret_blockable_mon_update(monitor_update))
6040 /// Applies the `ChannelUpdate` and returns a boolean indicating whether a change actually
6042 pub fn channel_update(&mut self, msg: &msgs::ChannelUpdate) -> Result<bool, ChannelError> {
6043 let new_forwarding_info = Some(CounterpartyForwardingInfo {
6044 fee_base_msat: msg.contents.fee_base_msat,
6045 fee_proportional_millionths: msg.contents.fee_proportional_millionths,
6046 cltv_expiry_delta: msg.contents.cltv_expiry_delta
6048 let did_change = self.context.counterparty_forwarding_info != new_forwarding_info;
6050 self.context.counterparty_forwarding_info = new_forwarding_info;
6056 /// Begins the shutdown process, getting a message for the remote peer and returning all
6057 /// holding cell HTLCs for payment failure.
6058 pub fn get_shutdown(&mut self, signer_provider: &SP, their_features: &InitFeatures,
6059 target_feerate_sats_per_kw: Option<u32>, override_shutdown_script: Option<ShutdownScript>)
6060 -> Result<(msgs::Shutdown, Option<ChannelMonitorUpdate>, Vec<(HTLCSource, PaymentHash)>), APIError>
6062 for htlc in self.context.pending_outbound_htlcs.iter() {
6063 if let OutboundHTLCState::LocalAnnounced(_) = htlc.state {
6064 return Err(APIError::APIMisuseError{err: "Cannot begin shutdown with pending HTLCs. Process pending events first".to_owned()});
6067 if self.context.channel_state.is_local_shutdown_sent() {
6068 return Err(APIError::APIMisuseError{err: "Shutdown already in progress".to_owned()});
6070 else if self.context.channel_state.is_remote_shutdown_sent() {
6071 return Err(APIError::ChannelUnavailable{err: "Shutdown already in progress by remote".to_owned()});
6073 if self.context.shutdown_scriptpubkey.is_some() && override_shutdown_script.is_some() {
6074 return Err(APIError::APIMisuseError{err: "Cannot override shutdown script for a channel with one already set".to_owned()});
6076 assert!(!matches!(self.context.channel_state, ChannelState::ShutdownComplete));
6077 if self.context.channel_state.is_peer_disconnected() || self.context.channel_state.is_monitor_update_in_progress() {
6078 return Err(APIError::ChannelUnavailable{err: "Cannot begin shutdown while peer is disconnected or we're waiting on a monitor update, maybe force-close instead?".to_owned()});
6081 let update_shutdown_script = match self.context.shutdown_scriptpubkey {
6084 // use override shutdown script if provided
6085 let shutdown_scriptpubkey = match override_shutdown_script {
6086 Some(script) => script,
6088 // otherwise, use the shutdown scriptpubkey provided by the signer
6089 match signer_provider.get_shutdown_scriptpubkey() {
6090 Ok(scriptpubkey) => scriptpubkey,
6091 Err(_) => return Err(APIError::ChannelUnavailable{err: "Failed to get shutdown scriptpubkey".to_owned()}),
6095 if !shutdown_scriptpubkey.is_compatible(their_features) {
6096 return Err(APIError::IncompatibleShutdownScript { script: shutdown_scriptpubkey.clone() });
6098 self.context.shutdown_scriptpubkey = Some(shutdown_scriptpubkey);
6103 // From here on out, we may not fail!
6104 self.context.target_closing_feerate_sats_per_kw = target_feerate_sats_per_kw;
6105 self.context.channel_state.set_local_shutdown_sent();
6106 self.context.update_time_counter += 1;
6108 let monitor_update = if update_shutdown_script {
6109 self.context.latest_monitor_update_id += 1;
6110 let monitor_update = ChannelMonitorUpdate {
6111 update_id: self.context.latest_monitor_update_id,
6112 updates: vec![ChannelMonitorUpdateStep::ShutdownScript {
6113 scriptpubkey: self.get_closing_scriptpubkey(),
6116 self.monitor_updating_paused(false, false, false, Vec::new(), Vec::new(), Vec::new());
6117 self.push_ret_blockable_mon_update(monitor_update)
6119 let shutdown = msgs::Shutdown {
6120 channel_id: self.context.channel_id,
6121 scriptpubkey: self.get_closing_scriptpubkey(),
6124 // Go ahead and drop holding cell updates as we'd rather fail payments than wait to send
6125 // our shutdown until we've committed all of the pending changes.
6126 self.context.holding_cell_update_fee = None;
6127 let mut dropped_outbound_htlcs = Vec::with_capacity(self.context.holding_cell_htlc_updates.len());
6128 self.context.holding_cell_htlc_updates.retain(|htlc_update| {
6130 &HTLCUpdateAwaitingACK::AddHTLC { ref payment_hash, ref source, .. } => {
6131 dropped_outbound_htlcs.push((source.clone(), payment_hash.clone()));
6138 debug_assert!(!self.is_shutdown() || monitor_update.is_none(),
6139 "we can't both complete shutdown and return a monitor update");
6141 Ok((shutdown, monitor_update, dropped_outbound_htlcs))
6144 pub fn inflight_htlc_sources(&self) -> impl Iterator<Item=(&HTLCSource, &PaymentHash)> {
6145 self.context.holding_cell_htlc_updates.iter()
6146 .flat_map(|htlc_update| {
6148 HTLCUpdateAwaitingACK::AddHTLC { source, payment_hash, .. }
6149 => Some((source, payment_hash)),
6153 .chain(self.context.pending_outbound_htlcs.iter().map(|htlc| (&htlc.source, &htlc.payment_hash)))
6157 /// A not-yet-funded outbound (from holder) channel using V1 channel establishment.
6158 pub(super) struct OutboundV1Channel<SP: Deref> where SP::Target: SignerProvider {
6159 pub context: ChannelContext<SP>,
6160 pub unfunded_context: UnfundedChannelContext,
6163 impl<SP: Deref> OutboundV1Channel<SP> where SP::Target: SignerProvider {
6164 pub fn new<ES: Deref, F: Deref>(
6165 fee_estimator: &LowerBoundedFeeEstimator<F>, entropy_source: &ES, signer_provider: &SP, counterparty_node_id: PublicKey, their_features: &InitFeatures,
6166 channel_value_satoshis: u64, push_msat: u64, user_id: u128, config: &UserConfig, current_chain_height: u32,
6167 outbound_scid_alias: u64, temporary_channel_id: Option<ChannelId>
6168 ) -> Result<OutboundV1Channel<SP>, APIError>
6169 where ES::Target: EntropySource,
6170 F::Target: FeeEstimator
6172 let holder_selected_contest_delay = config.channel_handshake_config.our_to_self_delay;
6173 let channel_keys_id = signer_provider.generate_channel_keys_id(false, channel_value_satoshis, user_id);
6174 let holder_signer = signer_provider.derive_channel_signer(channel_value_satoshis, channel_keys_id);
6175 let pubkeys = holder_signer.pubkeys().clone();
6177 if !their_features.supports_wumbo() && channel_value_satoshis > MAX_FUNDING_SATOSHIS_NO_WUMBO {
6178 return Err(APIError::APIMisuseError{err: format!("funding_value must not exceed {}, it was {}", MAX_FUNDING_SATOSHIS_NO_WUMBO, channel_value_satoshis)});
6180 if channel_value_satoshis >= TOTAL_BITCOIN_SUPPLY_SATOSHIS {
6181 return Err(APIError::APIMisuseError{err: format!("funding_value must be smaller than the total bitcoin supply, it was {}", channel_value_satoshis)});
6183 let channel_value_msat = channel_value_satoshis * 1000;
6184 if push_msat > channel_value_msat {
6185 return Err(APIError::APIMisuseError { err: format!("Push value ({}) was larger than channel_value ({})", push_msat, channel_value_msat) });
6187 if holder_selected_contest_delay < BREAKDOWN_TIMEOUT {
6188 return Err(APIError::APIMisuseError {err: format!("Configured with an unreasonable our_to_self_delay ({}) putting user funds at risks", holder_selected_contest_delay)});
6190 let holder_selected_channel_reserve_satoshis = get_holder_selected_channel_reserve_satoshis(channel_value_satoshis, config);
6191 if holder_selected_channel_reserve_satoshis < MIN_CHAN_DUST_LIMIT_SATOSHIS {
6192 // Protocol level safety check in place, although it should never happen because
6193 // of `MIN_THEIR_CHAN_RESERVE_SATOSHIS`
6194 return Err(APIError::APIMisuseError { err: format!("Holder selected channel reserve below implemention limit dust_limit_satoshis {}", holder_selected_channel_reserve_satoshis) });
6197 let channel_type = Self::get_initial_channel_type(&config, their_features);
6198 debug_assert!(channel_type.is_subset(&channelmanager::provided_channel_type_features(&config)));
6200 let (commitment_conf_target, anchor_outputs_value_msat) = if channel_type.supports_anchors_zero_fee_htlc_tx() {
6201 (ConfirmationTarget::AnchorChannelFee, ANCHOR_OUTPUT_VALUE_SATOSHI * 2 * 1000)
6203 (ConfirmationTarget::NonAnchorChannelFee, 0)
6205 let commitment_feerate = fee_estimator.bounded_sat_per_1000_weight(commitment_conf_target);
6207 let value_to_self_msat = channel_value_satoshis * 1000 - push_msat;
6208 let commitment_tx_fee = commit_tx_fee_msat(commitment_feerate, MIN_AFFORDABLE_HTLC_COUNT, &channel_type);
6209 if value_to_self_msat.saturating_sub(anchor_outputs_value_msat) < commitment_tx_fee {
6210 return Err(APIError::APIMisuseError{ err: format!("Funding amount ({}) can't even pay fee for initial commitment transaction fee of {}.", value_to_self_msat / 1000, commitment_tx_fee / 1000) });
6213 let mut secp_ctx = Secp256k1::new();
6214 secp_ctx.seeded_randomize(&entropy_source.get_secure_random_bytes());
6216 let shutdown_scriptpubkey = if config.channel_handshake_config.commit_upfront_shutdown_pubkey {
6217 match signer_provider.get_shutdown_scriptpubkey() {
6218 Ok(scriptpubkey) => Some(scriptpubkey),
6219 Err(_) => return Err(APIError::ChannelUnavailable { err: "Failed to get shutdown scriptpubkey".to_owned()}),
6223 if let Some(shutdown_scriptpubkey) = &shutdown_scriptpubkey {
6224 if !shutdown_scriptpubkey.is_compatible(&their_features) {
6225 return Err(APIError::IncompatibleShutdownScript { script: shutdown_scriptpubkey.clone() });
6229 let destination_script = match signer_provider.get_destination_script(channel_keys_id) {
6230 Ok(script) => script,
6231 Err(_) => return Err(APIError::ChannelUnavailable { err: "Failed to get destination script".to_owned()}),
6234 let temporary_channel_id = temporary_channel_id.unwrap_or_else(|| ChannelId::temporary_from_entropy_source(entropy_source));
6237 context: ChannelContext {
6240 config: LegacyChannelConfig {
6241 options: config.channel_config.clone(),
6242 announced_channel: config.channel_handshake_config.announced_channel,
6243 commit_upfront_shutdown_pubkey: config.channel_handshake_config.commit_upfront_shutdown_pubkey,
6248 inbound_handshake_limits_override: Some(config.channel_handshake_limits.clone()),
6250 channel_id: temporary_channel_id,
6251 temporary_channel_id: Some(temporary_channel_id),
6252 channel_state: ChannelState::NegotiatingFunding(NegotiatingFundingFlags::OUR_INIT_SENT),
6253 announcement_sigs_state: AnnouncementSigsState::NotSent,
6255 channel_value_satoshis,
6257 latest_monitor_update_id: 0,
6259 holder_signer: ChannelSignerType::Ecdsa(holder_signer),
6260 shutdown_scriptpubkey,
6263 cur_holder_commitment_transaction_number: INITIAL_COMMITMENT_NUMBER,
6264 cur_counterparty_commitment_transaction_number: INITIAL_COMMITMENT_NUMBER,
6267 pending_inbound_htlcs: Vec::new(),
6268 pending_outbound_htlcs: Vec::new(),
6269 holding_cell_htlc_updates: Vec::new(),
6270 pending_update_fee: None,
6271 holding_cell_update_fee: None,
6272 next_holder_htlc_id: 0,
6273 next_counterparty_htlc_id: 0,
6274 update_time_counter: 1,
6276 resend_order: RAACommitmentOrder::CommitmentFirst,
6278 monitor_pending_channel_ready: false,
6279 monitor_pending_revoke_and_ack: false,
6280 monitor_pending_commitment_signed: false,
6281 monitor_pending_forwards: Vec::new(),
6282 monitor_pending_failures: Vec::new(),
6283 monitor_pending_finalized_fulfills: Vec::new(),
6285 signer_pending_commitment_update: false,
6286 signer_pending_funding: false,
6288 #[cfg(debug_assertions)]
6289 holder_max_commitment_tx_output: Mutex::new((channel_value_satoshis * 1000 - push_msat, push_msat)),
6290 #[cfg(debug_assertions)]
6291 counterparty_max_commitment_tx_output: Mutex::new((channel_value_satoshis * 1000 - push_msat, push_msat)),
6293 last_sent_closing_fee: None,
6294 pending_counterparty_closing_signed: None,
6295 expecting_peer_commitment_signed: false,
6296 closing_fee_limits: None,
6297 target_closing_feerate_sats_per_kw: None,
6299 funding_tx_confirmed_in: None,
6300 funding_tx_confirmation_height: 0,
6301 short_channel_id: None,
6302 channel_creation_height: current_chain_height,
6304 feerate_per_kw: commitment_feerate,
6305 counterparty_dust_limit_satoshis: 0,
6306 holder_dust_limit_satoshis: MIN_CHAN_DUST_LIMIT_SATOSHIS,
6307 counterparty_max_htlc_value_in_flight_msat: 0,
6308 holder_max_htlc_value_in_flight_msat: get_holder_max_htlc_value_in_flight_msat(channel_value_satoshis, &config.channel_handshake_config),
6309 counterparty_selected_channel_reserve_satoshis: None, // Filled in in accept_channel
6310 holder_selected_channel_reserve_satoshis,
6311 counterparty_htlc_minimum_msat: 0,
6312 holder_htlc_minimum_msat: if config.channel_handshake_config.our_htlc_minimum_msat == 0 { 1 } else { config.channel_handshake_config.our_htlc_minimum_msat },
6313 counterparty_max_accepted_htlcs: 0,
6314 holder_max_accepted_htlcs: cmp::min(config.channel_handshake_config.our_max_accepted_htlcs, MAX_HTLCS),
6315 minimum_depth: None, // Filled in in accept_channel
6317 counterparty_forwarding_info: None,
6319 channel_transaction_parameters: ChannelTransactionParameters {
6320 holder_pubkeys: pubkeys,
6321 holder_selected_contest_delay: config.channel_handshake_config.our_to_self_delay,
6322 is_outbound_from_holder: true,
6323 counterparty_parameters: None,
6324 funding_outpoint: None,
6325 channel_type_features: channel_type.clone()
6327 funding_transaction: None,
6328 is_batch_funding: None,
6330 counterparty_cur_commitment_point: None,
6331 counterparty_prev_commitment_point: None,
6332 counterparty_node_id,
6334 counterparty_shutdown_scriptpubkey: None,
6336 commitment_secrets: CounterpartyCommitmentSecrets::new(),
6338 channel_update_status: ChannelUpdateStatus::Enabled,
6339 closing_signed_in_flight: false,
6341 announcement_sigs: None,
6343 #[cfg(any(test, fuzzing))]
6344 next_local_commitment_tx_fee_info_cached: Mutex::new(None),
6345 #[cfg(any(test, fuzzing))]
6346 next_remote_commitment_tx_fee_info_cached: Mutex::new(None),
6348 workaround_lnd_bug_4006: None,
6349 sent_message_awaiting_response: None,
6351 latest_inbound_scid_alias: None,
6352 outbound_scid_alias,
6354 channel_pending_event_emitted: false,
6355 channel_ready_event_emitted: false,
6357 #[cfg(any(test, fuzzing))]
6358 historical_inbound_htlc_fulfills: HashSet::new(),
6363 blocked_monitor_updates: Vec::new(),
6365 unfunded_context: UnfundedChannelContext { unfunded_channel_age_ticks: 0 }
6369 /// Only allowed after [`ChannelContext::channel_transaction_parameters`] is set.
6370 fn get_funding_created_msg<L: Deref>(&mut self, logger: &L) -> Option<msgs::FundingCreated> where L::Target: Logger {
6371 let counterparty_keys = self.context.build_remote_transaction_keys();
6372 let counterparty_initial_commitment_tx = self.context.build_commitment_transaction(self.context.cur_counterparty_commitment_transaction_number, &counterparty_keys, false, false, logger).tx;
6373 let signature = match &self.context.holder_signer {
6374 // TODO (taproot|arik): move match into calling method for Taproot
6375 ChannelSignerType::Ecdsa(ecdsa) => {
6376 ecdsa.sign_counterparty_commitment(&counterparty_initial_commitment_tx, Vec::new(), Vec::new(), &self.context.secp_ctx)
6377 .map(|(sig, _)| sig).ok()?
6379 // TODO (taproot|arik)
6384 if self.context.signer_pending_funding {
6385 log_trace!(logger, "Counterparty commitment signature ready for funding_created message: clearing signer_pending_funding");
6386 self.context.signer_pending_funding = false;
6389 Some(msgs::FundingCreated {
6390 temporary_channel_id: self.context.temporary_channel_id.unwrap(),
6391 funding_txid: self.context.channel_transaction_parameters.funding_outpoint.as_ref().unwrap().txid,
6392 funding_output_index: self.context.channel_transaction_parameters.funding_outpoint.as_ref().unwrap().index,
6395 partial_signature_with_nonce: None,
6397 next_local_nonce: None,
6401 /// Updates channel state with knowledge of the funding transaction's txid/index, and generates
6402 /// a funding_created message for the remote peer.
6403 /// Panics if called at some time other than immediately after initial handshake, if called twice,
6404 /// or if called on an inbound channel.
6405 /// Note that channel_id changes during this call!
6406 /// Do NOT broadcast the funding transaction until after a successful funding_signed call!
6407 /// If an Err is returned, it is a ChannelError::Close.
6408 pub fn get_funding_created<L: Deref>(&mut self, funding_transaction: Transaction, funding_txo: OutPoint, is_batch_funding: bool, logger: &L)
6409 -> Result<Option<msgs::FundingCreated>, (Self, ChannelError)> where L::Target: Logger {
6410 if !self.context.is_outbound() {
6411 panic!("Tried to create outbound funding_created message on an inbound channel!");
6414 self.context.channel_state, ChannelState::NegotiatingFunding(flags)
6415 if flags == (NegotiatingFundingFlags::OUR_INIT_SENT | NegotiatingFundingFlags::THEIR_INIT_SENT)
6417 panic!("Tried to get a funding_created messsage at a time other than immediately after initial handshake completion (or tried to get funding_created twice)");
6419 if self.context.commitment_secrets.get_min_seen_secret() != (1 << 48) ||
6420 self.context.cur_counterparty_commitment_transaction_number != INITIAL_COMMITMENT_NUMBER ||
6421 self.context.cur_holder_commitment_transaction_number != INITIAL_COMMITMENT_NUMBER {
6422 panic!("Should not have advanced channel commitment tx numbers prior to funding_created");
6425 self.context.channel_transaction_parameters.funding_outpoint = Some(funding_txo);
6426 self.context.holder_signer.as_mut().provide_channel_parameters(&self.context.channel_transaction_parameters);
6428 // Now that we're past error-generating stuff, update our local state:
6430 self.context.channel_state = ChannelState::FundingNegotiated;
6431 self.context.channel_id = funding_txo.to_channel_id();
6433 // If the funding transaction is a coinbase transaction, we need to set the minimum depth to 100.
6434 // We can skip this if it is a zero-conf channel.
6435 if funding_transaction.is_coin_base() &&
6436 self.context.minimum_depth.unwrap_or(0) > 0 &&
6437 self.context.minimum_depth.unwrap_or(0) < COINBASE_MATURITY {
6438 self.context.minimum_depth = Some(COINBASE_MATURITY);
6441 self.context.funding_transaction = Some(funding_transaction);
6442 self.context.is_batch_funding = Some(()).filter(|_| is_batch_funding);
6444 let funding_created = self.get_funding_created_msg(logger);
6445 if funding_created.is_none() {
6446 if !self.context.signer_pending_funding {
6447 log_trace!(logger, "funding_created awaiting signer; setting signer_pending_funding");
6448 self.context.signer_pending_funding = true;
6455 fn get_initial_channel_type(config: &UserConfig, their_features: &InitFeatures) -> ChannelTypeFeatures {
6456 // The default channel type (ie the first one we try) depends on whether the channel is
6457 // public - if it is, we just go with `only_static_remotekey` as it's the only option
6458 // available. If it's private, we first try `scid_privacy` as it provides better privacy
6459 // with no other changes, and fall back to `only_static_remotekey`.
6460 let mut ret = ChannelTypeFeatures::only_static_remote_key();
6461 if !config.channel_handshake_config.announced_channel &&
6462 config.channel_handshake_config.negotiate_scid_privacy &&
6463 their_features.supports_scid_privacy() {
6464 ret.set_scid_privacy_required();
6467 // Optionally, if the user would like to negotiate the `anchors_zero_fee_htlc_tx` option, we
6468 // set it now. If they don't understand it, we'll fall back to our default of
6469 // `only_static_remotekey`.
6470 if config.channel_handshake_config.negotiate_anchors_zero_fee_htlc_tx &&
6471 their_features.supports_anchors_zero_fee_htlc_tx() {
6472 ret.set_anchors_zero_fee_htlc_tx_required();
6478 /// If we receive an error message, it may only be a rejection of the channel type we tried,
6479 /// not of our ability to open any channel at all. Thus, on error, we should first call this
6480 /// and see if we get a new `OpenChannel` message, otherwise the channel is failed.
6481 pub(crate) fn maybe_handle_error_without_close<F: Deref>(
6482 &mut self, chain_hash: ChainHash, fee_estimator: &LowerBoundedFeeEstimator<F>
6483 ) -> Result<msgs::OpenChannel, ()>
6485 F::Target: FeeEstimator
6487 if !self.context.is_outbound() ||
6489 self.context.channel_state, ChannelState::NegotiatingFunding(flags)
6490 if flags == NegotiatingFundingFlags::OUR_INIT_SENT
6495 if self.context.channel_type == ChannelTypeFeatures::only_static_remote_key() {
6496 // We've exhausted our options
6499 // We support opening a few different types of channels. Try removing our additional
6500 // features one by one until we've either arrived at our default or the counterparty has
6503 // Due to the order below, we may not negotiate `option_anchors_zero_fee_htlc_tx` if the
6504 // counterparty doesn't support `option_scid_privacy`. Since `get_initial_channel_type`
6505 // checks whether the counterparty supports every feature, this would only happen if the
6506 // counterparty is advertising the feature, but rejecting channels proposing the feature for
6508 if self.context.channel_type.supports_anchors_zero_fee_htlc_tx() {
6509 self.context.channel_type.clear_anchors_zero_fee_htlc_tx();
6510 self.context.feerate_per_kw = fee_estimator.bounded_sat_per_1000_weight(ConfirmationTarget::NonAnchorChannelFee);
6511 assert!(!self.context.channel_transaction_parameters.channel_type_features.supports_anchors_nonzero_fee_htlc_tx());
6512 } else if self.context.channel_type.supports_scid_privacy() {
6513 self.context.channel_type.clear_scid_privacy();
6515 self.context.channel_type = ChannelTypeFeatures::only_static_remote_key();
6517 self.context.channel_transaction_parameters.channel_type_features = self.context.channel_type.clone();
6518 Ok(self.get_open_channel(chain_hash))
6521 pub fn get_open_channel(&self, chain_hash: ChainHash) -> msgs::OpenChannel {
6522 if !self.context.is_outbound() {
6523 panic!("Tried to open a channel for an inbound channel?");
6525 if self.context.have_received_message() {
6526 panic!("Cannot generate an open_channel after we've moved forward");
6529 if self.context.cur_holder_commitment_transaction_number != INITIAL_COMMITMENT_NUMBER {
6530 panic!("Tried to send an open_channel for a channel that has already advanced");
6533 let first_per_commitment_point = self.context.holder_signer.as_ref().get_per_commitment_point(self.context.cur_holder_commitment_transaction_number, &self.context.secp_ctx);
6534 let keys = self.context.get_holder_pubkeys();
6538 temporary_channel_id: self.context.channel_id,
6539 funding_satoshis: self.context.channel_value_satoshis,
6540 push_msat: self.context.channel_value_satoshis * 1000 - self.context.value_to_self_msat,
6541 dust_limit_satoshis: self.context.holder_dust_limit_satoshis,
6542 max_htlc_value_in_flight_msat: self.context.holder_max_htlc_value_in_flight_msat,
6543 channel_reserve_satoshis: self.context.holder_selected_channel_reserve_satoshis,
6544 htlc_minimum_msat: self.context.holder_htlc_minimum_msat,
6545 feerate_per_kw: self.context.feerate_per_kw as u32,
6546 to_self_delay: self.context.get_holder_selected_contest_delay(),
6547 max_accepted_htlcs: self.context.holder_max_accepted_htlcs,
6548 funding_pubkey: keys.funding_pubkey,
6549 revocation_basepoint: keys.revocation_basepoint.to_public_key(),
6550 payment_point: keys.payment_point,
6551 delayed_payment_basepoint: keys.delayed_payment_basepoint.to_public_key(),
6552 htlc_basepoint: keys.htlc_basepoint.to_public_key(),
6553 first_per_commitment_point,
6554 channel_flags: if self.context.config.announced_channel {1} else {0},
6555 shutdown_scriptpubkey: Some(match &self.context.shutdown_scriptpubkey {
6556 Some(script) => script.clone().into_inner(),
6557 None => Builder::new().into_script(),
6559 channel_type: Some(self.context.channel_type.clone()),
6564 pub fn accept_channel(&mut self, msg: &msgs::AcceptChannel, default_limits: &ChannelHandshakeLimits, their_features: &InitFeatures) -> Result<(), ChannelError> {
6565 let peer_limits = if let Some(ref limits) = self.context.inbound_handshake_limits_override { limits } else { default_limits };
6567 // Check sanity of message fields:
6568 if !self.context.is_outbound() {
6569 return Err(ChannelError::Close("Got an accept_channel message from an inbound peer".to_owned()));
6571 if !matches!(self.context.channel_state, ChannelState::NegotiatingFunding(flags) if flags == NegotiatingFundingFlags::OUR_INIT_SENT) {
6572 return Err(ChannelError::Close("Got an accept_channel message at a strange time".to_owned()));
6574 if msg.dust_limit_satoshis > 21000000 * 100000000 {
6575 return Err(ChannelError::Close(format!("Peer never wants payout outputs? dust_limit_satoshis was {}", msg.dust_limit_satoshis)));
6577 if msg.channel_reserve_satoshis > self.context.channel_value_satoshis {
6578 return Err(ChannelError::Close(format!("Bogus channel_reserve_satoshis ({}). Must not be greater than ({})", msg.channel_reserve_satoshis, self.context.channel_value_satoshis)));
6580 if msg.dust_limit_satoshis > self.context.holder_selected_channel_reserve_satoshis {
6581 return Err(ChannelError::Close(format!("Dust limit ({}) is bigger than our channel reserve ({})", msg.dust_limit_satoshis, self.context.holder_selected_channel_reserve_satoshis)));
6583 if msg.channel_reserve_satoshis > self.context.channel_value_satoshis - self.context.holder_selected_channel_reserve_satoshis {
6584 return Err(ChannelError::Close(format!("Bogus channel_reserve_satoshis ({}). Must not be greater than channel value minus our reserve ({})",
6585 msg.channel_reserve_satoshis, self.context.channel_value_satoshis - self.context.holder_selected_channel_reserve_satoshis)));
6587 let full_channel_value_msat = (self.context.channel_value_satoshis - msg.channel_reserve_satoshis) * 1000;
6588 if msg.htlc_minimum_msat >= full_channel_value_msat {
6589 return Err(ChannelError::Close(format!("Minimum htlc value ({}) is full channel value ({})", msg.htlc_minimum_msat, full_channel_value_msat)));
6591 let max_delay_acceptable = u16::min(peer_limits.their_to_self_delay, MAX_LOCAL_BREAKDOWN_TIMEOUT);
6592 if msg.to_self_delay > max_delay_acceptable {
6593 return Err(ChannelError::Close(format!("They wanted our payments to be delayed by a needlessly long period. Upper limit: {}. Actual: {}", max_delay_acceptable, msg.to_self_delay)));
6595 if msg.max_accepted_htlcs < 1 {
6596 return Err(ChannelError::Close("0 max_accepted_htlcs makes for a useless channel".to_owned()));
6598 if msg.max_accepted_htlcs > MAX_HTLCS {
6599 return Err(ChannelError::Close(format!("max_accepted_htlcs was {}. It must not be larger than {}", msg.max_accepted_htlcs, MAX_HTLCS)));
6602 // Now check against optional parameters as set by config...
6603 if msg.htlc_minimum_msat > peer_limits.max_htlc_minimum_msat {
6604 return Err(ChannelError::Close(format!("htlc_minimum_msat ({}) is higher than the user specified limit ({})", msg.htlc_minimum_msat, peer_limits.max_htlc_minimum_msat)));
6606 if msg.max_htlc_value_in_flight_msat < peer_limits.min_max_htlc_value_in_flight_msat {
6607 return Err(ChannelError::Close(format!("max_htlc_value_in_flight_msat ({}) is less than the user specified limit ({})", msg.max_htlc_value_in_flight_msat, peer_limits.min_max_htlc_value_in_flight_msat)));
6609 if msg.channel_reserve_satoshis > peer_limits.max_channel_reserve_satoshis {
6610 return Err(ChannelError::Close(format!("channel_reserve_satoshis ({}) is higher than the user specified limit ({})", msg.channel_reserve_satoshis, peer_limits.max_channel_reserve_satoshis)));
6612 if msg.max_accepted_htlcs < peer_limits.min_max_accepted_htlcs {
6613 return Err(ChannelError::Close(format!("max_accepted_htlcs ({}) is less than the user specified limit ({})", msg.max_accepted_htlcs, peer_limits.min_max_accepted_htlcs)));
6615 if msg.dust_limit_satoshis < MIN_CHAN_DUST_LIMIT_SATOSHIS {
6616 return Err(ChannelError::Close(format!("dust_limit_satoshis ({}) is less than the implementation limit ({})", msg.dust_limit_satoshis, MIN_CHAN_DUST_LIMIT_SATOSHIS)));
6618 if msg.dust_limit_satoshis > MAX_CHAN_DUST_LIMIT_SATOSHIS {
6619 return Err(ChannelError::Close(format!("dust_limit_satoshis ({}) is greater than the implementation limit ({})", msg.dust_limit_satoshis, MAX_CHAN_DUST_LIMIT_SATOSHIS)));
6621 if msg.minimum_depth > peer_limits.max_minimum_depth {
6622 return Err(ChannelError::Close(format!("We consider the minimum depth to be unreasonably large. Expected minimum: ({}). Actual: ({})", peer_limits.max_minimum_depth, msg.minimum_depth)));
6625 if let Some(ty) = &msg.channel_type {
6626 if *ty != self.context.channel_type {
6627 return Err(ChannelError::Close("Channel Type in accept_channel didn't match the one sent in open_channel.".to_owned()));
6629 } else if their_features.supports_channel_type() {
6630 // Assume they've accepted the channel type as they said they understand it.
6632 let channel_type = ChannelTypeFeatures::from_init(&their_features);
6633 if channel_type != ChannelTypeFeatures::only_static_remote_key() {
6634 return Err(ChannelError::Close("Only static_remote_key is supported for non-negotiated channel types".to_owned()));
6636 self.context.channel_type = channel_type.clone();
6637 self.context.channel_transaction_parameters.channel_type_features = channel_type;
6640 let counterparty_shutdown_scriptpubkey = if their_features.supports_upfront_shutdown_script() {
6641 match &msg.shutdown_scriptpubkey {
6642 &Some(ref script) => {
6643 // Peer is signaling upfront_shutdown and has opt-out with a 0-length script. We don't enforce anything
6644 if script.len() == 0 {
6647 if !script::is_bolt2_compliant(&script, their_features) {
6648 return Err(ChannelError::Close(format!("Peer is signaling upfront_shutdown but has provided an unacceptable scriptpubkey format: {}", script)));
6650 Some(script.clone())
6653 // Peer is signaling upfront shutdown but don't opt-out with correct mechanism (a.k.a 0-length script). Peer looks buggy, we fail the channel
6655 return Err(ChannelError::Close("Peer is signaling upfront_shutdown but we don't get any script. Use 0-length script to opt-out".to_owned()));
6660 self.context.counterparty_dust_limit_satoshis = msg.dust_limit_satoshis;
6661 self.context.counterparty_max_htlc_value_in_flight_msat = cmp::min(msg.max_htlc_value_in_flight_msat, self.context.channel_value_satoshis * 1000);
6662 self.context.counterparty_selected_channel_reserve_satoshis = Some(msg.channel_reserve_satoshis);
6663 self.context.counterparty_htlc_minimum_msat = msg.htlc_minimum_msat;
6664 self.context.counterparty_max_accepted_htlcs = msg.max_accepted_htlcs;
6666 if peer_limits.trust_own_funding_0conf {
6667 self.context.minimum_depth = Some(msg.minimum_depth);
6669 self.context.minimum_depth = Some(cmp::max(1, msg.minimum_depth));
6672 let counterparty_pubkeys = ChannelPublicKeys {
6673 funding_pubkey: msg.funding_pubkey,
6674 revocation_basepoint: RevocationBasepoint::from(msg.revocation_basepoint),
6675 payment_point: msg.payment_point,
6676 delayed_payment_basepoint: DelayedPaymentBasepoint::from(msg.delayed_payment_basepoint),
6677 htlc_basepoint: HtlcBasepoint::from(msg.htlc_basepoint)
6680 self.context.channel_transaction_parameters.counterparty_parameters = Some(CounterpartyChannelTransactionParameters {
6681 selected_contest_delay: msg.to_self_delay,
6682 pubkeys: counterparty_pubkeys,
6685 self.context.counterparty_cur_commitment_point = Some(msg.first_per_commitment_point);
6686 self.context.counterparty_shutdown_scriptpubkey = counterparty_shutdown_scriptpubkey;
6688 self.context.channel_state = ChannelState::NegotiatingFunding(
6689 NegotiatingFundingFlags::OUR_INIT_SENT | NegotiatingFundingFlags::THEIR_INIT_SENT
6691 self.context.inbound_handshake_limits_override = None; // We're done enforcing limits on our peer's handshake now.
6696 /// Handles a funding_signed message from the remote end.
6697 /// If this call is successful, broadcast the funding transaction (and not before!)
6698 pub fn funding_signed<L: Deref>(
6699 mut self, msg: &msgs::FundingSigned, best_block: BestBlock, signer_provider: &SP, logger: &L
6700 ) -> Result<(Channel<SP>, ChannelMonitor<<SP::Target as SignerProvider>::EcdsaSigner>), (OutboundV1Channel<SP>, ChannelError)>
6704 if !self.context.is_outbound() {
6705 return Err((self, ChannelError::Close("Received funding_signed for an inbound channel?".to_owned())));
6707 if !matches!(self.context.channel_state, ChannelState::FundingNegotiated) {
6708 return Err((self, ChannelError::Close("Received funding_signed in strange state!".to_owned())));
6710 if self.context.commitment_secrets.get_min_seen_secret() != (1 << 48) ||
6711 self.context.cur_counterparty_commitment_transaction_number != INITIAL_COMMITMENT_NUMBER ||
6712 self.context.cur_holder_commitment_transaction_number != INITIAL_COMMITMENT_NUMBER {
6713 panic!("Should not have advanced channel commitment tx numbers prior to funding_created");
6716 let funding_script = self.context.get_funding_redeemscript();
6718 let counterparty_keys = self.context.build_remote_transaction_keys();
6719 let counterparty_initial_commitment_tx = self.context.build_commitment_transaction(self.context.cur_counterparty_commitment_transaction_number, &counterparty_keys, false, false, logger).tx;
6720 let counterparty_trusted_tx = counterparty_initial_commitment_tx.trust();
6721 let counterparty_initial_bitcoin_tx = counterparty_trusted_tx.built_transaction();
6723 log_trace!(logger, "Initial counterparty tx for channel {} is: txid {} tx {}",
6724 &self.context.channel_id(), counterparty_initial_bitcoin_tx.txid, encode::serialize_hex(&counterparty_initial_bitcoin_tx.transaction));
6726 let holder_signer = self.context.build_holder_transaction_keys(self.context.cur_holder_commitment_transaction_number);
6727 let initial_commitment_tx = self.context.build_commitment_transaction(self.context.cur_holder_commitment_transaction_number, &holder_signer, true, false, logger).tx;
6729 let trusted_tx = initial_commitment_tx.trust();
6730 let initial_commitment_bitcoin_tx = trusted_tx.built_transaction();
6731 let sighash = initial_commitment_bitcoin_tx.get_sighash_all(&funding_script, self.context.channel_value_satoshis);
6732 // They sign our commitment transaction, allowing us to broadcast the tx if we wish.
6733 if let Err(_) = self.context.secp_ctx.verify_ecdsa(&sighash, &msg.signature, &self.context.get_counterparty_pubkeys().funding_pubkey) {
6734 return Err((self, ChannelError::Close("Invalid funding_signed signature from peer".to_owned())));
6738 let holder_commitment_tx = HolderCommitmentTransaction::new(
6739 initial_commitment_tx,
6742 &self.context.get_holder_pubkeys().funding_pubkey,
6743 self.context.counterparty_funding_pubkey()
6747 self.context.holder_signer.as_ref().validate_holder_commitment(&holder_commitment_tx, Vec::new());
6748 if validated.is_err() {
6749 return Err((self, ChannelError::Close("Failed to validate our commitment".to_owned())));
6752 let funding_redeemscript = self.context.get_funding_redeemscript();
6753 let funding_txo = self.context.get_funding_txo().unwrap();
6754 let funding_txo_script = funding_redeemscript.to_v0_p2wsh();
6755 let obscure_factor = get_commitment_transaction_number_obscure_factor(&self.context.get_holder_pubkeys().payment_point, &self.context.get_counterparty_pubkeys().payment_point, self.context.is_outbound());
6756 let shutdown_script = self.context.shutdown_scriptpubkey.clone().map(|script| script.into_inner());
6757 let mut monitor_signer = signer_provider.derive_channel_signer(self.context.channel_value_satoshis, self.context.channel_keys_id);
6758 monitor_signer.provide_channel_parameters(&self.context.channel_transaction_parameters);
6759 let channel_monitor = ChannelMonitor::new(self.context.secp_ctx.clone(), monitor_signer,
6760 shutdown_script, self.context.get_holder_selected_contest_delay(),
6761 &self.context.destination_script, (funding_txo, funding_txo_script),
6762 &self.context.channel_transaction_parameters,
6763 funding_redeemscript.clone(), self.context.channel_value_satoshis,
6765 holder_commitment_tx, best_block, self.context.counterparty_node_id);
6766 channel_monitor.provide_initial_counterparty_commitment_tx(
6767 counterparty_initial_bitcoin_tx.txid, Vec::new(),
6768 self.context.cur_counterparty_commitment_transaction_number,
6769 self.context.counterparty_cur_commitment_point.unwrap(),
6770 counterparty_initial_commitment_tx.feerate_per_kw(),
6771 counterparty_initial_commitment_tx.to_broadcaster_value_sat(),
6772 counterparty_initial_commitment_tx.to_countersignatory_value_sat(), logger);
6774 assert!(!self.context.channel_state.is_monitor_update_in_progress()); // We have no had any monitor(s) yet to fail update!
6775 if self.context.is_batch_funding() {
6776 self.context.channel_state = ChannelState::AwaitingChannelReady(AwaitingChannelReadyFlags::WAITING_FOR_BATCH);
6778 self.context.channel_state = ChannelState::AwaitingChannelReady(AwaitingChannelReadyFlags::new());
6780 self.context.cur_holder_commitment_transaction_number -= 1;
6781 self.context.cur_counterparty_commitment_transaction_number -= 1;
6783 log_info!(logger, "Received funding_signed from peer for channel {}", &self.context.channel_id());
6785 let mut channel = Channel { context: self.context };
6787 let need_channel_ready = channel.check_get_channel_ready(0).is_some();
6788 channel.monitor_updating_paused(false, false, need_channel_ready, Vec::new(), Vec::new(), Vec::new());
6789 Ok((channel, channel_monitor))
6792 /// Indicates that the signer may have some signatures for us, so we should retry if we're
6795 pub fn signer_maybe_unblocked<L: Deref>(&mut self, logger: &L) -> Option<msgs::FundingCreated> where L::Target: Logger {
6796 if self.context.signer_pending_funding && self.context.is_outbound() {
6797 log_trace!(logger, "Signer unblocked a funding_created");
6798 self.get_funding_created_msg(logger)
6803 /// A not-yet-funded inbound (from counterparty) channel using V1 channel establishment.
6804 pub(super) struct InboundV1Channel<SP: Deref> where SP::Target: SignerProvider {
6805 pub context: ChannelContext<SP>,
6806 pub unfunded_context: UnfundedChannelContext,
6809 impl<SP: Deref> InboundV1Channel<SP> where SP::Target: SignerProvider {
6810 /// Creates a new channel from a remote sides' request for one.
6811 /// Assumes chain_hash has already been checked and corresponds with what we expect!
6812 pub fn new<ES: Deref, F: Deref, L: Deref>(
6813 fee_estimator: &LowerBoundedFeeEstimator<F>, entropy_source: &ES, signer_provider: &SP,
6814 counterparty_node_id: PublicKey, our_supported_features: &ChannelTypeFeatures,
6815 their_features: &InitFeatures, msg: &msgs::OpenChannel, user_id: u128, config: &UserConfig,
6816 current_chain_height: u32, logger: &L, is_0conf: bool,
6817 ) -> Result<InboundV1Channel<SP>, ChannelError>
6818 where ES::Target: EntropySource,
6819 F::Target: FeeEstimator,
6822 let logger = WithContext::from(logger, Some(counterparty_node_id), Some(msg.temporary_channel_id));
6823 let announced_channel = if (msg.channel_flags & 1) == 1 { true } else { false };
6825 // First check the channel type is known, failing before we do anything else if we don't
6826 // support this channel type.
6827 let channel_type = if let Some(channel_type) = &msg.channel_type {
6828 if channel_type.supports_any_optional_bits() {
6829 return Err(ChannelError::Close("Channel Type field contained optional bits - this is not allowed".to_owned()));
6832 // We only support the channel types defined by the `ChannelManager` in
6833 // `provided_channel_type_features`. The channel type must always support
6834 // `static_remote_key`.
6835 if !channel_type.requires_static_remote_key() {
6836 return Err(ChannelError::Close("Channel Type was not understood - we require static remote key".to_owned()));
6838 // Make sure we support all of the features behind the channel type.
6839 if !channel_type.is_subset(our_supported_features) {
6840 return Err(ChannelError::Close("Channel Type contains unsupported features".to_owned()));
6842 if channel_type.requires_scid_privacy() && announced_channel {
6843 return Err(ChannelError::Close("SCID Alias/Privacy Channel Type cannot be set on a public channel".to_owned()));
6845 channel_type.clone()
6847 let channel_type = ChannelTypeFeatures::from_init(&their_features);
6848 if channel_type != ChannelTypeFeatures::only_static_remote_key() {
6849 return Err(ChannelError::Close("Only static_remote_key is supported for non-negotiated channel types".to_owned()));
6854 let channel_keys_id = signer_provider.generate_channel_keys_id(true, msg.funding_satoshis, user_id);
6855 let holder_signer = signer_provider.derive_channel_signer(msg.funding_satoshis, channel_keys_id);
6856 let pubkeys = holder_signer.pubkeys().clone();
6857 let counterparty_pubkeys = ChannelPublicKeys {
6858 funding_pubkey: msg.funding_pubkey,
6859 revocation_basepoint: RevocationBasepoint::from(msg.revocation_basepoint),
6860 payment_point: msg.payment_point,
6861 delayed_payment_basepoint: DelayedPaymentBasepoint::from(msg.delayed_payment_basepoint),
6862 htlc_basepoint: HtlcBasepoint::from(msg.htlc_basepoint)
6865 if config.channel_handshake_config.our_to_self_delay < BREAKDOWN_TIMEOUT {
6866 return Err(ChannelError::Close(format!("Configured with an unreasonable our_to_self_delay ({}) putting user funds at risks. It must be greater than {}", config.channel_handshake_config.our_to_self_delay, BREAKDOWN_TIMEOUT)));
6869 // Check sanity of message fields:
6870 if msg.funding_satoshis > config.channel_handshake_limits.max_funding_satoshis {
6871 return Err(ChannelError::Close(format!("Per our config, funding must be at most {}. It was {}", config.channel_handshake_limits.max_funding_satoshis, msg.funding_satoshis)));
6873 if msg.funding_satoshis >= TOTAL_BITCOIN_SUPPLY_SATOSHIS {
6874 return Err(ChannelError::Close(format!("Funding must be smaller than the total bitcoin supply. It was {}", msg.funding_satoshis)));
6876 if msg.channel_reserve_satoshis > msg.funding_satoshis {
6877 return Err(ChannelError::Close(format!("Bogus channel_reserve_satoshis ({}). Must be not greater than funding_satoshis: {}", msg.channel_reserve_satoshis, msg.funding_satoshis)));
6879 let full_channel_value_msat = (msg.funding_satoshis - msg.channel_reserve_satoshis) * 1000;
6880 if msg.push_msat > full_channel_value_msat {
6881 return Err(ChannelError::Close(format!("push_msat {} was larger than channel amount minus reserve ({})", msg.push_msat, full_channel_value_msat)));
6883 if msg.dust_limit_satoshis > msg.funding_satoshis {
6884 return Err(ChannelError::Close(format!("dust_limit_satoshis {} was larger than funding_satoshis {}. Peer never wants payout outputs?", msg.dust_limit_satoshis, msg.funding_satoshis)));
6886 if msg.htlc_minimum_msat >= full_channel_value_msat {
6887 return Err(ChannelError::Close(format!("Minimum htlc value ({}) was larger than full channel value ({})", msg.htlc_minimum_msat, full_channel_value_msat)));
6889 Channel::<SP>::check_remote_fee(&channel_type, fee_estimator, msg.feerate_per_kw, None, &&logger)?;
6891 let max_counterparty_selected_contest_delay = u16::min(config.channel_handshake_limits.their_to_self_delay, MAX_LOCAL_BREAKDOWN_TIMEOUT);
6892 if msg.to_self_delay > max_counterparty_selected_contest_delay {
6893 return Err(ChannelError::Close(format!("They wanted our payments to be delayed by a needlessly long period. Upper limit: {}. Actual: {}", max_counterparty_selected_contest_delay, msg.to_self_delay)));
6895 if msg.max_accepted_htlcs < 1 {
6896 return Err(ChannelError::Close("0 max_accepted_htlcs makes for a useless channel".to_owned()));
6898 if msg.max_accepted_htlcs > MAX_HTLCS {
6899 return Err(ChannelError::Close(format!("max_accepted_htlcs was {}. It must not be larger than {}", msg.max_accepted_htlcs, MAX_HTLCS)));
6902 // Now check against optional parameters as set by config...
6903 if msg.funding_satoshis < config.channel_handshake_limits.min_funding_satoshis {
6904 return Err(ChannelError::Close(format!("Funding satoshis ({}) is less than the user specified limit ({})", msg.funding_satoshis, config.channel_handshake_limits.min_funding_satoshis)));
6906 if msg.htlc_minimum_msat > config.channel_handshake_limits.max_htlc_minimum_msat {
6907 return Err(ChannelError::Close(format!("htlc_minimum_msat ({}) is higher than the user specified limit ({})", msg.htlc_minimum_msat, config.channel_handshake_limits.max_htlc_minimum_msat)));
6909 if msg.max_htlc_value_in_flight_msat < config.channel_handshake_limits.min_max_htlc_value_in_flight_msat {
6910 return Err(ChannelError::Close(format!("max_htlc_value_in_flight_msat ({}) is less than the user specified limit ({})", msg.max_htlc_value_in_flight_msat, config.channel_handshake_limits.min_max_htlc_value_in_flight_msat)));
6912 if msg.channel_reserve_satoshis > config.channel_handshake_limits.max_channel_reserve_satoshis {
6913 return Err(ChannelError::Close(format!("channel_reserve_satoshis ({}) is higher than the user specified limit ({})", msg.channel_reserve_satoshis, config.channel_handshake_limits.max_channel_reserve_satoshis)));
6915 if msg.max_accepted_htlcs < config.channel_handshake_limits.min_max_accepted_htlcs {
6916 return Err(ChannelError::Close(format!("max_accepted_htlcs ({}) is less than the user specified limit ({})", msg.max_accepted_htlcs, config.channel_handshake_limits.min_max_accepted_htlcs)));
6918 if msg.dust_limit_satoshis < MIN_CHAN_DUST_LIMIT_SATOSHIS {
6919 return Err(ChannelError::Close(format!("dust_limit_satoshis ({}) is less than the implementation limit ({})", msg.dust_limit_satoshis, MIN_CHAN_DUST_LIMIT_SATOSHIS)));
6921 if msg.dust_limit_satoshis > MAX_CHAN_DUST_LIMIT_SATOSHIS {
6922 return Err(ChannelError::Close(format!("dust_limit_satoshis ({}) is greater than the implementation limit ({})", msg.dust_limit_satoshis, MAX_CHAN_DUST_LIMIT_SATOSHIS)));
6925 // Convert things into internal flags and prep our state:
6927 if config.channel_handshake_limits.force_announced_channel_preference {
6928 if config.channel_handshake_config.announced_channel != announced_channel {
6929 return Err(ChannelError::Close("Peer tried to open channel but their announcement preference is different from ours".to_owned()));
6933 let holder_selected_channel_reserve_satoshis = get_holder_selected_channel_reserve_satoshis(msg.funding_satoshis, config);
6934 if holder_selected_channel_reserve_satoshis < MIN_CHAN_DUST_LIMIT_SATOSHIS {
6935 // Protocol level safety check in place, although it should never happen because
6936 // of `MIN_THEIR_CHAN_RESERVE_SATOSHIS`
6937 return Err(ChannelError::Close(format!("Suitable channel reserve not found. remote_channel_reserve was ({}). dust_limit_satoshis is ({}).", holder_selected_channel_reserve_satoshis, MIN_CHAN_DUST_LIMIT_SATOSHIS)));
6939 if holder_selected_channel_reserve_satoshis * 1000 >= full_channel_value_msat {
6940 return Err(ChannelError::Close(format!("Suitable channel reserve not found. remote_channel_reserve was ({})msats. Channel value is ({} - {})msats.", holder_selected_channel_reserve_satoshis * 1000, full_channel_value_msat, msg.push_msat)));
6942 if msg.channel_reserve_satoshis < MIN_CHAN_DUST_LIMIT_SATOSHIS {
6943 log_debug!(logger, "channel_reserve_satoshis ({}) is smaller than our dust limit ({}). We can broadcast stale states without any risk, implying this channel is very insecure for our counterparty.",
6944 msg.channel_reserve_satoshis, MIN_CHAN_DUST_LIMIT_SATOSHIS);
6946 if holder_selected_channel_reserve_satoshis < msg.dust_limit_satoshis {
6947 return Err(ChannelError::Close(format!("Dust limit ({}) too high for the channel reserve we require the remote to keep ({})", msg.dust_limit_satoshis, holder_selected_channel_reserve_satoshis)));
6950 // check if the funder's amount for the initial commitment tx is sufficient
6951 // for full fee payment plus a few HTLCs to ensure the channel will be useful.
6952 let anchor_outputs_value = if channel_type.supports_anchors_zero_fee_htlc_tx() {
6953 ANCHOR_OUTPUT_VALUE_SATOSHI * 2
6957 let funders_amount_msat = msg.funding_satoshis * 1000 - msg.push_msat;
6958 let commitment_tx_fee = commit_tx_fee_msat(msg.feerate_per_kw, MIN_AFFORDABLE_HTLC_COUNT, &channel_type) / 1000;
6959 if (funders_amount_msat / 1000).saturating_sub(anchor_outputs_value) < commitment_tx_fee {
6960 return Err(ChannelError::Close(format!("Funding amount ({} sats) can't even pay fee for initial commitment transaction fee of {} sats.", (funders_amount_msat / 1000).saturating_sub(anchor_outputs_value), commitment_tx_fee)));
6963 let to_remote_satoshis = funders_amount_msat / 1000 - commitment_tx_fee - anchor_outputs_value;
6964 // While it's reasonable for us to not meet the channel reserve initially (if they don't
6965 // want to push much to us), our counterparty should always have more than our reserve.
6966 if to_remote_satoshis < holder_selected_channel_reserve_satoshis {
6967 return Err(ChannelError::Close("Insufficient funding amount for initial reserve".to_owned()));
6970 let counterparty_shutdown_scriptpubkey = if their_features.supports_upfront_shutdown_script() {
6971 match &msg.shutdown_scriptpubkey {
6972 &Some(ref script) => {
6973 // Peer is signaling upfront_shutdown and has opt-out with a 0-length script. We don't enforce anything
6974 if script.len() == 0 {
6977 if !script::is_bolt2_compliant(&script, their_features) {
6978 return Err(ChannelError::Close(format!("Peer is signaling upfront_shutdown but has provided an unacceptable scriptpubkey format: {}", script)))
6980 Some(script.clone())
6983 // Peer is signaling upfront shutdown but don't opt-out with correct mechanism (a.k.a 0-length script). Peer looks buggy, we fail the channel
6985 return Err(ChannelError::Close("Peer is signaling upfront_shutdown but we don't get any script. Use 0-length script to opt-out".to_owned()));
6990 let shutdown_scriptpubkey = if config.channel_handshake_config.commit_upfront_shutdown_pubkey {
6991 match signer_provider.get_shutdown_scriptpubkey() {
6992 Ok(scriptpubkey) => Some(scriptpubkey),
6993 Err(_) => return Err(ChannelError::Close("Failed to get upfront shutdown scriptpubkey".to_owned())),
6997 if let Some(shutdown_scriptpubkey) = &shutdown_scriptpubkey {
6998 if !shutdown_scriptpubkey.is_compatible(&their_features) {
6999 return Err(ChannelError::Close(format!("Provided a scriptpubkey format not accepted by peer: {}", shutdown_scriptpubkey)));
7003 let destination_script = match signer_provider.get_destination_script(channel_keys_id) {
7004 Ok(script) => script,
7005 Err(_) => return Err(ChannelError::Close("Failed to get destination script".to_owned())),
7008 let mut secp_ctx = Secp256k1::new();
7009 secp_ctx.seeded_randomize(&entropy_source.get_secure_random_bytes());
7011 let minimum_depth = if is_0conf {
7014 Some(cmp::max(config.channel_handshake_config.minimum_depth, 1))
7018 context: ChannelContext {
7021 config: LegacyChannelConfig {
7022 options: config.channel_config.clone(),
7024 commit_upfront_shutdown_pubkey: config.channel_handshake_config.commit_upfront_shutdown_pubkey,
7029 inbound_handshake_limits_override: None,
7031 temporary_channel_id: Some(msg.temporary_channel_id),
7032 channel_id: msg.temporary_channel_id,
7033 channel_state: ChannelState::NegotiatingFunding(
7034 NegotiatingFundingFlags::OUR_INIT_SENT | NegotiatingFundingFlags::THEIR_INIT_SENT
7036 announcement_sigs_state: AnnouncementSigsState::NotSent,
7039 latest_monitor_update_id: 0,
7041 holder_signer: ChannelSignerType::Ecdsa(holder_signer),
7042 shutdown_scriptpubkey,
7045 cur_holder_commitment_transaction_number: INITIAL_COMMITMENT_NUMBER,
7046 cur_counterparty_commitment_transaction_number: INITIAL_COMMITMENT_NUMBER,
7047 value_to_self_msat: msg.push_msat,
7049 pending_inbound_htlcs: Vec::new(),
7050 pending_outbound_htlcs: Vec::new(),
7051 holding_cell_htlc_updates: Vec::new(),
7052 pending_update_fee: None,
7053 holding_cell_update_fee: None,
7054 next_holder_htlc_id: 0,
7055 next_counterparty_htlc_id: 0,
7056 update_time_counter: 1,
7058 resend_order: RAACommitmentOrder::CommitmentFirst,
7060 monitor_pending_channel_ready: false,
7061 monitor_pending_revoke_and_ack: false,
7062 monitor_pending_commitment_signed: false,
7063 monitor_pending_forwards: Vec::new(),
7064 monitor_pending_failures: Vec::new(),
7065 monitor_pending_finalized_fulfills: Vec::new(),
7067 signer_pending_commitment_update: false,
7068 signer_pending_funding: false,
7070 #[cfg(debug_assertions)]
7071 holder_max_commitment_tx_output: Mutex::new((msg.push_msat, msg.funding_satoshis * 1000 - msg.push_msat)),
7072 #[cfg(debug_assertions)]
7073 counterparty_max_commitment_tx_output: Mutex::new((msg.push_msat, msg.funding_satoshis * 1000 - msg.push_msat)),
7075 last_sent_closing_fee: None,
7076 pending_counterparty_closing_signed: None,
7077 expecting_peer_commitment_signed: false,
7078 closing_fee_limits: None,
7079 target_closing_feerate_sats_per_kw: None,
7081 funding_tx_confirmed_in: None,
7082 funding_tx_confirmation_height: 0,
7083 short_channel_id: None,
7084 channel_creation_height: current_chain_height,
7086 feerate_per_kw: msg.feerate_per_kw,
7087 channel_value_satoshis: msg.funding_satoshis,
7088 counterparty_dust_limit_satoshis: msg.dust_limit_satoshis,
7089 holder_dust_limit_satoshis: MIN_CHAN_DUST_LIMIT_SATOSHIS,
7090 counterparty_max_htlc_value_in_flight_msat: cmp::min(msg.max_htlc_value_in_flight_msat, msg.funding_satoshis * 1000),
7091 holder_max_htlc_value_in_flight_msat: get_holder_max_htlc_value_in_flight_msat(msg.funding_satoshis, &config.channel_handshake_config),
7092 counterparty_selected_channel_reserve_satoshis: Some(msg.channel_reserve_satoshis),
7093 holder_selected_channel_reserve_satoshis,
7094 counterparty_htlc_minimum_msat: msg.htlc_minimum_msat,
7095 holder_htlc_minimum_msat: if config.channel_handshake_config.our_htlc_minimum_msat == 0 { 1 } else { config.channel_handshake_config.our_htlc_minimum_msat },
7096 counterparty_max_accepted_htlcs: msg.max_accepted_htlcs,
7097 holder_max_accepted_htlcs: cmp::min(config.channel_handshake_config.our_max_accepted_htlcs, MAX_HTLCS),
7100 counterparty_forwarding_info: None,
7102 channel_transaction_parameters: ChannelTransactionParameters {
7103 holder_pubkeys: pubkeys,
7104 holder_selected_contest_delay: config.channel_handshake_config.our_to_self_delay,
7105 is_outbound_from_holder: false,
7106 counterparty_parameters: Some(CounterpartyChannelTransactionParameters {
7107 selected_contest_delay: msg.to_self_delay,
7108 pubkeys: counterparty_pubkeys,
7110 funding_outpoint: None,
7111 channel_type_features: channel_type.clone()
7113 funding_transaction: None,
7114 is_batch_funding: None,
7116 counterparty_cur_commitment_point: Some(msg.first_per_commitment_point),
7117 counterparty_prev_commitment_point: None,
7118 counterparty_node_id,
7120 counterparty_shutdown_scriptpubkey,
7122 commitment_secrets: CounterpartyCommitmentSecrets::new(),
7124 channel_update_status: ChannelUpdateStatus::Enabled,
7125 closing_signed_in_flight: false,
7127 announcement_sigs: None,
7129 #[cfg(any(test, fuzzing))]
7130 next_local_commitment_tx_fee_info_cached: Mutex::new(None),
7131 #[cfg(any(test, fuzzing))]
7132 next_remote_commitment_tx_fee_info_cached: Mutex::new(None),
7134 workaround_lnd_bug_4006: None,
7135 sent_message_awaiting_response: None,
7137 latest_inbound_scid_alias: None,
7138 outbound_scid_alias: 0,
7140 channel_pending_event_emitted: false,
7141 channel_ready_event_emitted: false,
7143 #[cfg(any(test, fuzzing))]
7144 historical_inbound_htlc_fulfills: HashSet::new(),
7149 blocked_monitor_updates: Vec::new(),
7151 unfunded_context: UnfundedChannelContext { unfunded_channel_age_ticks: 0 }
7157 /// Marks an inbound channel as accepted and generates a [`msgs::AcceptChannel`] message which
7158 /// should be sent back to the counterparty node.
7160 /// [`msgs::AcceptChannel`]: crate::ln::msgs::AcceptChannel
7161 pub fn accept_inbound_channel(&mut self) -> msgs::AcceptChannel {
7162 if self.context.is_outbound() {
7163 panic!("Tried to send accept_channel for an outbound channel?");
7166 self.context.channel_state, ChannelState::NegotiatingFunding(flags)
7167 if flags == (NegotiatingFundingFlags::OUR_INIT_SENT | NegotiatingFundingFlags::THEIR_INIT_SENT)
7169 panic!("Tried to send accept_channel after channel had moved forward");
7171 if self.context.cur_holder_commitment_transaction_number != INITIAL_COMMITMENT_NUMBER {
7172 panic!("Tried to send an accept_channel for a channel that has already advanced");
7175 self.generate_accept_channel_message()
7178 /// This function is used to explicitly generate a [`msgs::AcceptChannel`] message for an
7179 /// inbound channel. If the intention is to accept an inbound channel, use
7180 /// [`InboundV1Channel::accept_inbound_channel`] instead.
7182 /// [`msgs::AcceptChannel`]: crate::ln::msgs::AcceptChannel
7183 fn generate_accept_channel_message(&self) -> msgs::AcceptChannel {
7184 let first_per_commitment_point = self.context.holder_signer.as_ref().get_per_commitment_point(self.context.cur_holder_commitment_transaction_number, &self.context.secp_ctx);
7185 let keys = self.context.get_holder_pubkeys();
7187 msgs::AcceptChannel {
7188 temporary_channel_id: self.context.channel_id,
7189 dust_limit_satoshis: self.context.holder_dust_limit_satoshis,
7190 max_htlc_value_in_flight_msat: self.context.holder_max_htlc_value_in_flight_msat,
7191 channel_reserve_satoshis: self.context.holder_selected_channel_reserve_satoshis,
7192 htlc_minimum_msat: self.context.holder_htlc_minimum_msat,
7193 minimum_depth: self.context.minimum_depth.unwrap(),
7194 to_self_delay: self.context.get_holder_selected_contest_delay(),
7195 max_accepted_htlcs: self.context.holder_max_accepted_htlcs,
7196 funding_pubkey: keys.funding_pubkey,
7197 revocation_basepoint: keys.revocation_basepoint.to_public_key(),
7198 payment_point: keys.payment_point,
7199 delayed_payment_basepoint: keys.delayed_payment_basepoint.to_public_key(),
7200 htlc_basepoint: keys.htlc_basepoint.to_public_key(),
7201 first_per_commitment_point,
7202 shutdown_scriptpubkey: Some(match &self.context.shutdown_scriptpubkey {
7203 Some(script) => script.clone().into_inner(),
7204 None => Builder::new().into_script(),
7206 channel_type: Some(self.context.channel_type.clone()),
7208 next_local_nonce: None,
7212 /// Enables the possibility for tests to extract a [`msgs::AcceptChannel`] message for an
7213 /// inbound channel without accepting it.
7215 /// [`msgs::AcceptChannel`]: crate::ln::msgs::AcceptChannel
7217 pub fn get_accept_channel_message(&self) -> msgs::AcceptChannel {
7218 self.generate_accept_channel_message()
7221 fn check_funding_created_signature<L: Deref>(&mut self, sig: &Signature, logger: &L) -> Result<CommitmentTransaction, ChannelError> where L::Target: Logger {
7222 let funding_script = self.context.get_funding_redeemscript();
7224 let keys = self.context.build_holder_transaction_keys(self.context.cur_holder_commitment_transaction_number);
7225 let initial_commitment_tx = self.context.build_commitment_transaction(self.context.cur_holder_commitment_transaction_number, &keys, true, false, logger).tx;
7226 let trusted_tx = initial_commitment_tx.trust();
7227 let initial_commitment_bitcoin_tx = trusted_tx.built_transaction();
7228 let sighash = initial_commitment_bitcoin_tx.get_sighash_all(&funding_script, self.context.channel_value_satoshis);
7229 // They sign the holder commitment transaction...
7230 log_trace!(logger, "Checking funding_created tx signature {} by key {} against tx {} (sighash {}) with redeemscript {} for channel {}.",
7231 log_bytes!(sig.serialize_compact()[..]), log_bytes!(self.context.counterparty_funding_pubkey().serialize()),
7232 encode::serialize_hex(&initial_commitment_bitcoin_tx.transaction), log_bytes!(sighash[..]),
7233 encode::serialize_hex(&funding_script), &self.context.channel_id());
7234 secp_check!(self.context.secp_ctx.verify_ecdsa(&sighash, &sig, self.context.counterparty_funding_pubkey()), "Invalid funding_created signature from peer".to_owned());
7236 Ok(initial_commitment_tx)
7239 pub fn funding_created<L: Deref>(
7240 mut self, msg: &msgs::FundingCreated, best_block: BestBlock, signer_provider: &SP, logger: &L
7241 ) -> Result<(Channel<SP>, Option<msgs::FundingSigned>, ChannelMonitor<<SP::Target as SignerProvider>::EcdsaSigner>), (Self, ChannelError)>
7245 if self.context.is_outbound() {
7246 return Err((self, ChannelError::Close("Received funding_created for an outbound channel?".to_owned())));
7249 self.context.channel_state, ChannelState::NegotiatingFunding(flags)
7250 if flags == (NegotiatingFundingFlags::OUR_INIT_SENT | NegotiatingFundingFlags::THEIR_INIT_SENT)
7252 // BOLT 2 says that if we disconnect before we send funding_signed we SHOULD NOT
7253 // remember the channel, so it's safe to just send an error_message here and drop the
7255 return Err((self, ChannelError::Close("Received funding_created after we got the channel!".to_owned())));
7257 if self.context.commitment_secrets.get_min_seen_secret() != (1 << 48) ||
7258 self.context.cur_counterparty_commitment_transaction_number != INITIAL_COMMITMENT_NUMBER ||
7259 self.context.cur_holder_commitment_transaction_number != INITIAL_COMMITMENT_NUMBER {
7260 panic!("Should not have advanced channel commitment tx numbers prior to funding_created");
7263 let funding_txo = OutPoint { txid: msg.funding_txid, index: msg.funding_output_index };
7264 self.context.channel_transaction_parameters.funding_outpoint = Some(funding_txo);
7265 // This is an externally observable change before we finish all our checks. In particular
7266 // check_funding_created_signature may fail.
7267 self.context.holder_signer.as_mut().provide_channel_parameters(&self.context.channel_transaction_parameters);
7269 let initial_commitment_tx = match self.check_funding_created_signature(&msg.signature, logger) {
7271 Err(ChannelError::Close(e)) => {
7272 self.context.channel_transaction_parameters.funding_outpoint = None;
7273 return Err((self, ChannelError::Close(e)));
7276 // The only error we know how to handle is ChannelError::Close, so we fall over here
7277 // to make sure we don't continue with an inconsistent state.
7278 panic!("unexpected error type from check_funding_created_signature {:?}", e);
7282 let holder_commitment_tx = HolderCommitmentTransaction::new(
7283 initial_commitment_tx,
7286 &self.context.get_holder_pubkeys().funding_pubkey,
7287 self.context.counterparty_funding_pubkey()
7290 if let Err(_) = self.context.holder_signer.as_ref().validate_holder_commitment(&holder_commitment_tx, Vec::new()) {
7291 return Err((self, ChannelError::Close("Failed to validate our commitment".to_owned())));
7294 // Now that we're past error-generating stuff, update our local state:
7296 self.context.channel_state = ChannelState::AwaitingChannelReady(AwaitingChannelReadyFlags::new());
7297 self.context.channel_id = funding_txo.to_channel_id();
7298 self.context.cur_counterparty_commitment_transaction_number -= 1;
7299 self.context.cur_holder_commitment_transaction_number -= 1;
7301 let (counterparty_initial_commitment_tx, funding_signed) = self.context.get_funding_signed_msg(logger);
7303 let funding_redeemscript = self.context.get_funding_redeemscript();
7304 let funding_txo_script = funding_redeemscript.to_v0_p2wsh();
7305 let obscure_factor = get_commitment_transaction_number_obscure_factor(&self.context.get_holder_pubkeys().payment_point, &self.context.get_counterparty_pubkeys().payment_point, self.context.is_outbound());
7306 let shutdown_script = self.context.shutdown_scriptpubkey.clone().map(|script| script.into_inner());
7307 let mut monitor_signer = signer_provider.derive_channel_signer(self.context.channel_value_satoshis, self.context.channel_keys_id);
7308 monitor_signer.provide_channel_parameters(&self.context.channel_transaction_parameters);
7309 let channel_monitor = ChannelMonitor::new(self.context.secp_ctx.clone(), monitor_signer,
7310 shutdown_script, self.context.get_holder_selected_contest_delay(),
7311 &self.context.destination_script, (funding_txo, funding_txo_script.clone()),
7312 &self.context.channel_transaction_parameters,
7313 funding_redeemscript.clone(), self.context.channel_value_satoshis,
7315 holder_commitment_tx, best_block, self.context.counterparty_node_id);
7316 channel_monitor.provide_initial_counterparty_commitment_tx(
7317 counterparty_initial_commitment_tx.trust().txid(), Vec::new(),
7318 self.context.cur_counterparty_commitment_transaction_number + 1,
7319 self.context.counterparty_cur_commitment_point.unwrap(), self.context.feerate_per_kw,
7320 counterparty_initial_commitment_tx.to_broadcaster_value_sat(),
7321 counterparty_initial_commitment_tx.to_countersignatory_value_sat(), logger);
7323 log_info!(logger, "{} funding_signed for peer for channel {}",
7324 if funding_signed.is_some() { "Generated" } else { "Waiting for signature on" }, &self.context.channel_id());
7326 // Promote the channel to a full-fledged one now that we have updated the state and have a
7327 // `ChannelMonitor`.
7328 let mut channel = Channel {
7329 context: self.context,
7331 let need_channel_ready = channel.check_get_channel_ready(0).is_some();
7332 channel.monitor_updating_paused(false, false, need_channel_ready, Vec::new(), Vec::new(), Vec::new());
7334 Ok((channel, funding_signed, channel_monitor))
7338 const SERIALIZATION_VERSION: u8 = 3;
7339 const MIN_SERIALIZATION_VERSION: u8 = 3;
7341 impl_writeable_tlv_based_enum!(InboundHTLCRemovalReason,;
7347 impl Writeable for ChannelUpdateStatus {
7348 fn write<W: Writer>(&self, writer: &mut W) -> Result<(), io::Error> {
7349 // We only care about writing out the current state as it was announced, ie only either
7350 // Enabled or Disabled. In the case of DisabledStaged, we most recently announced the
7351 // channel as enabled, so we write 0. For EnabledStaged, we similarly write a 1.
7353 ChannelUpdateStatus::Enabled => 0u8.write(writer)?,
7354 ChannelUpdateStatus::DisabledStaged(_) => 0u8.write(writer)?,
7355 ChannelUpdateStatus::EnabledStaged(_) => 1u8.write(writer)?,
7356 ChannelUpdateStatus::Disabled => 1u8.write(writer)?,
7362 impl Readable for ChannelUpdateStatus {
7363 fn read<R: io::Read>(reader: &mut R) -> Result<Self, DecodeError> {
7364 Ok(match <u8 as Readable>::read(reader)? {
7365 0 => ChannelUpdateStatus::Enabled,
7366 1 => ChannelUpdateStatus::Disabled,
7367 _ => return Err(DecodeError::InvalidValue),
7372 impl Writeable for AnnouncementSigsState {
7373 fn write<W: Writer>(&self, writer: &mut W) -> Result<(), io::Error> {
7374 // We only care about writing out the current state as if we had just disconnected, at
7375 // which point we always set anything but AnnouncementSigsReceived to NotSent.
7377 AnnouncementSigsState::NotSent => 0u8.write(writer),
7378 AnnouncementSigsState::MessageSent => 0u8.write(writer),
7379 AnnouncementSigsState::Committed => 0u8.write(writer),
7380 AnnouncementSigsState::PeerReceived => 1u8.write(writer),
7385 impl Readable for AnnouncementSigsState {
7386 fn read<R: io::Read>(reader: &mut R) -> Result<Self, DecodeError> {
7387 Ok(match <u8 as Readable>::read(reader)? {
7388 0 => AnnouncementSigsState::NotSent,
7389 1 => AnnouncementSigsState::PeerReceived,
7390 _ => return Err(DecodeError::InvalidValue),
7395 impl<SP: Deref> Writeable for Channel<SP> where SP::Target: SignerProvider {
7396 fn write<W: Writer>(&self, writer: &mut W) -> Result<(), io::Error> {
7397 // Note that we write out as if remove_uncommitted_htlcs_and_mark_paused had just been
7400 write_ver_prefix!(writer, MIN_SERIALIZATION_VERSION, MIN_SERIALIZATION_VERSION);
7402 // `user_id` used to be a single u64 value. In order to remain backwards compatible with
7403 // versions prior to 0.0.113, the u128 is serialized as two separate u64 values. We write
7404 // the low bytes now and the optional high bytes later.
7405 let user_id_low = self.context.user_id as u64;
7406 user_id_low.write(writer)?;
7408 // Version 1 deserializers expected to read parts of the config object here. Version 2
7409 // deserializers (0.0.99) now read config through TLVs, and as we now require them for
7410 // `minimum_depth` we simply write dummy values here.
7411 writer.write_all(&[0; 8])?;
7413 self.context.channel_id.write(writer)?;
7415 let mut channel_state = self.context.channel_state;
7416 if matches!(channel_state, ChannelState::AwaitingChannelReady(_)|ChannelState::ChannelReady(_)) {
7417 channel_state.set_peer_disconnected();
7419 channel_state.to_u32().write(writer)?;
7421 self.context.channel_value_satoshis.write(writer)?;
7423 self.context.latest_monitor_update_id.write(writer)?;
7425 // Write out the old serialization for shutdown_pubkey for backwards compatibility, if
7426 // deserialized from that format.
7427 match self.context.shutdown_scriptpubkey.as_ref().and_then(|script| script.as_legacy_pubkey()) {
7428 Some(shutdown_pubkey) => shutdown_pubkey.write(writer)?,
7429 None => [0u8; PUBLIC_KEY_SIZE].write(writer)?,
7431 self.context.destination_script.write(writer)?;
7433 self.context.cur_holder_commitment_transaction_number.write(writer)?;
7434 self.context.cur_counterparty_commitment_transaction_number.write(writer)?;
7435 self.context.value_to_self_msat.write(writer)?;
7437 let mut dropped_inbound_htlcs = 0;
7438 for htlc in self.context.pending_inbound_htlcs.iter() {
7439 if let InboundHTLCState::RemoteAnnounced(_) = htlc.state {
7440 dropped_inbound_htlcs += 1;
7443 (self.context.pending_inbound_htlcs.len() as u64 - dropped_inbound_htlcs).write(writer)?;
7444 for htlc in self.context.pending_inbound_htlcs.iter() {
7445 if let &InboundHTLCState::RemoteAnnounced(_) = &htlc.state {
7448 htlc.htlc_id.write(writer)?;
7449 htlc.amount_msat.write(writer)?;
7450 htlc.cltv_expiry.write(writer)?;
7451 htlc.payment_hash.write(writer)?;
7453 &InboundHTLCState::RemoteAnnounced(_) => unreachable!(),
7454 &InboundHTLCState::AwaitingRemoteRevokeToAnnounce(ref htlc_state) => {
7456 htlc_state.write(writer)?;
7458 &InboundHTLCState::AwaitingAnnouncedRemoteRevoke(ref htlc_state) => {
7460 htlc_state.write(writer)?;
7462 &InboundHTLCState::Committed => {
7465 &InboundHTLCState::LocalRemoved(ref removal_reason) => {
7467 removal_reason.write(writer)?;
7472 let mut preimages: Vec<&Option<PaymentPreimage>> = vec![];
7473 let mut pending_outbound_skimmed_fees: Vec<Option<u64>> = Vec::new();
7474 let mut pending_outbound_blinding_points: Vec<Option<PublicKey>> = Vec::new();
7476 (self.context.pending_outbound_htlcs.len() as u64).write(writer)?;
7477 for htlc in self.context.pending_outbound_htlcs.iter() {
7478 htlc.htlc_id.write(writer)?;
7479 htlc.amount_msat.write(writer)?;
7480 htlc.cltv_expiry.write(writer)?;
7481 htlc.payment_hash.write(writer)?;
7482 htlc.source.write(writer)?;
7484 &OutboundHTLCState::LocalAnnounced(ref onion_packet) => {
7486 onion_packet.write(writer)?;
7488 &OutboundHTLCState::Committed => {
7491 &OutboundHTLCState::RemoteRemoved(_) => {
7492 // Treat this as a Committed because we haven't received the CS - they'll
7493 // resend the claim/fail on reconnect as we all (hopefully) the missing CS.
7496 &OutboundHTLCState::AwaitingRemoteRevokeToRemove(ref outcome) => {
7498 if let OutboundHTLCOutcome::Success(preimage) = outcome {
7499 preimages.push(preimage);
7501 let reason: Option<&HTLCFailReason> = outcome.into();
7502 reason.write(writer)?;
7504 &OutboundHTLCState::AwaitingRemovedRemoteRevoke(ref outcome) => {
7506 if let OutboundHTLCOutcome::Success(preimage) = outcome {
7507 preimages.push(preimage);
7509 let reason: Option<&HTLCFailReason> = outcome.into();
7510 reason.write(writer)?;
7513 pending_outbound_skimmed_fees.push(htlc.skimmed_fee_msat);
7514 pending_outbound_blinding_points.push(htlc.blinding_point);
7517 let mut holding_cell_skimmed_fees: Vec<Option<u64>> = Vec::new();
7518 let mut holding_cell_blinding_points: Vec<Option<PublicKey>> = Vec::new();
7519 // Vec of (htlc_id, failure_code, sha256_of_onion)
7520 let mut malformed_htlcs: Vec<(u64, u16, [u8; 32])> = Vec::new();
7521 (self.context.holding_cell_htlc_updates.len() as u64).write(writer)?;
7522 for update in self.context.holding_cell_htlc_updates.iter() {
7524 &HTLCUpdateAwaitingACK::AddHTLC {
7525 ref amount_msat, ref cltv_expiry, ref payment_hash, ref source, ref onion_routing_packet,
7526 blinding_point, skimmed_fee_msat,
7529 amount_msat.write(writer)?;
7530 cltv_expiry.write(writer)?;
7531 payment_hash.write(writer)?;
7532 source.write(writer)?;
7533 onion_routing_packet.write(writer)?;
7535 holding_cell_skimmed_fees.push(skimmed_fee_msat);
7536 holding_cell_blinding_points.push(blinding_point);
7538 &HTLCUpdateAwaitingACK::ClaimHTLC { ref payment_preimage, ref htlc_id } => {
7540 payment_preimage.write(writer)?;
7541 htlc_id.write(writer)?;
7543 &HTLCUpdateAwaitingACK::FailHTLC { ref htlc_id, ref err_packet } => {
7545 htlc_id.write(writer)?;
7546 err_packet.write(writer)?;
7548 &HTLCUpdateAwaitingACK::FailMalformedHTLC {
7549 htlc_id, failure_code, sha256_of_onion
7551 // We don't want to break downgrading by adding a new variant, so write a dummy
7552 // `::FailHTLC` variant and write the real malformed error as an optional TLV.
7553 malformed_htlcs.push((htlc_id, failure_code, sha256_of_onion));
7555 let dummy_err_packet = msgs::OnionErrorPacket { data: Vec::new() };
7557 htlc_id.write(writer)?;
7558 dummy_err_packet.write(writer)?;
7563 match self.context.resend_order {
7564 RAACommitmentOrder::CommitmentFirst => 0u8.write(writer)?,
7565 RAACommitmentOrder::RevokeAndACKFirst => 1u8.write(writer)?,
7568 self.context.monitor_pending_channel_ready.write(writer)?;
7569 self.context.monitor_pending_revoke_and_ack.write(writer)?;
7570 self.context.monitor_pending_commitment_signed.write(writer)?;
7572 (self.context.monitor_pending_forwards.len() as u64).write(writer)?;
7573 for &(ref pending_forward, ref htlc_id) in self.context.monitor_pending_forwards.iter() {
7574 pending_forward.write(writer)?;
7575 htlc_id.write(writer)?;
7578 (self.context.monitor_pending_failures.len() as u64).write(writer)?;
7579 for &(ref htlc_source, ref payment_hash, ref fail_reason) in self.context.monitor_pending_failures.iter() {
7580 htlc_source.write(writer)?;
7581 payment_hash.write(writer)?;
7582 fail_reason.write(writer)?;
7585 if self.context.is_outbound() {
7586 self.context.pending_update_fee.map(|(a, _)| a).write(writer)?;
7587 } else if let Some((feerate, FeeUpdateState::AwaitingRemoteRevokeToAnnounce)) = self.context.pending_update_fee {
7588 Some(feerate).write(writer)?;
7590 // As for inbound HTLCs, if the update was only announced and never committed in a
7591 // commitment_signed, drop it.
7592 None::<u32>.write(writer)?;
7594 self.context.holding_cell_update_fee.write(writer)?;
7596 self.context.next_holder_htlc_id.write(writer)?;
7597 (self.context.next_counterparty_htlc_id - dropped_inbound_htlcs).write(writer)?;
7598 self.context.update_time_counter.write(writer)?;
7599 self.context.feerate_per_kw.write(writer)?;
7601 // Versions prior to 0.0.100 expected to read the fields of `last_sent_closing_fee` here,
7602 // however we are supposed to restart shutdown fee negotiation on reconnect (and wipe
7603 // `last_send_closing_fee` in `remove_uncommitted_htlcs_and_mark_paused`) so we should never
7604 // consider the stale state on reload.
7607 self.context.funding_tx_confirmed_in.write(writer)?;
7608 self.context.funding_tx_confirmation_height.write(writer)?;
7609 self.context.short_channel_id.write(writer)?;
7611 self.context.counterparty_dust_limit_satoshis.write(writer)?;
7612 self.context.holder_dust_limit_satoshis.write(writer)?;
7613 self.context.counterparty_max_htlc_value_in_flight_msat.write(writer)?;
7615 // Note that this field is ignored by 0.0.99+ as the TLV Optional variant is used instead.
7616 self.context.counterparty_selected_channel_reserve_satoshis.unwrap_or(0).write(writer)?;
7618 self.context.counterparty_htlc_minimum_msat.write(writer)?;
7619 self.context.holder_htlc_minimum_msat.write(writer)?;
7620 self.context.counterparty_max_accepted_htlcs.write(writer)?;
7622 // Note that this field is ignored by 0.0.99+ as the TLV Optional variant is used instead.
7623 self.context.minimum_depth.unwrap_or(0).write(writer)?;
7625 match &self.context.counterparty_forwarding_info {
7628 info.fee_base_msat.write(writer)?;
7629 info.fee_proportional_millionths.write(writer)?;
7630 info.cltv_expiry_delta.write(writer)?;
7632 None => 0u8.write(writer)?
7635 self.context.channel_transaction_parameters.write(writer)?;
7636 self.context.funding_transaction.write(writer)?;
7638 self.context.counterparty_cur_commitment_point.write(writer)?;
7639 self.context.counterparty_prev_commitment_point.write(writer)?;
7640 self.context.counterparty_node_id.write(writer)?;
7642 self.context.counterparty_shutdown_scriptpubkey.write(writer)?;
7644 self.context.commitment_secrets.write(writer)?;
7646 self.context.channel_update_status.write(writer)?;
7648 #[cfg(any(test, fuzzing))]
7649 (self.context.historical_inbound_htlc_fulfills.len() as u64).write(writer)?;
7650 #[cfg(any(test, fuzzing))]
7651 for htlc in self.context.historical_inbound_htlc_fulfills.iter() {
7652 htlc.write(writer)?;
7655 // If the channel type is something other than only-static-remote-key, then we need to have
7656 // older clients fail to deserialize this channel at all. If the type is
7657 // only-static-remote-key, we simply consider it "default" and don't write the channel type
7659 let chan_type = if self.context.channel_type != ChannelTypeFeatures::only_static_remote_key() {
7660 Some(&self.context.channel_type) } else { None };
7662 // The same logic applies for `holder_selected_channel_reserve_satoshis` values other than
7663 // the default, and when `holder_max_htlc_value_in_flight_msat` is configured to be set to
7664 // a different percentage of the channel value then 10%, which older versions of LDK used
7665 // to set it to before the percentage was made configurable.
7666 let serialized_holder_selected_reserve =
7667 if self.context.holder_selected_channel_reserve_satoshis != get_legacy_default_holder_selected_channel_reserve_satoshis(self.context.channel_value_satoshis)
7668 { Some(self.context.holder_selected_channel_reserve_satoshis) } else { None };
7670 let mut old_max_in_flight_percent_config = UserConfig::default().channel_handshake_config;
7671 old_max_in_flight_percent_config.max_inbound_htlc_value_in_flight_percent_of_channel = MAX_IN_FLIGHT_PERCENT_LEGACY;
7672 let serialized_holder_htlc_max_in_flight =
7673 if self.context.holder_max_htlc_value_in_flight_msat != get_holder_max_htlc_value_in_flight_msat(self.context.channel_value_satoshis, &old_max_in_flight_percent_config)
7674 { Some(self.context.holder_max_htlc_value_in_flight_msat) } else { None };
7676 let channel_pending_event_emitted = Some(self.context.channel_pending_event_emitted);
7677 let channel_ready_event_emitted = Some(self.context.channel_ready_event_emitted);
7679 // `user_id` used to be a single u64 value. In order to remain backwards compatible with
7680 // versions prior to 0.0.113, the u128 is serialized as two separate u64 values. Therefore,
7681 // we write the high bytes as an option here.
7682 let user_id_high_opt = Some((self.context.user_id >> 64) as u64);
7684 let holder_max_accepted_htlcs = if self.context.holder_max_accepted_htlcs == DEFAULT_MAX_HTLCS { None } else { Some(self.context.holder_max_accepted_htlcs) };
7686 write_tlv_fields!(writer, {
7687 (0, self.context.announcement_sigs, option),
7688 // minimum_depth and counterparty_selected_channel_reserve_satoshis used to have a
7689 // default value instead of being Option<>al. Thus, to maintain compatibility we write
7690 // them twice, once with their original default values above, and once as an option
7691 // here. On the read side, old versions will simply ignore the odd-type entries here,
7692 // and new versions map the default values to None and allow the TLV entries here to
7694 (1, self.context.minimum_depth, option),
7695 (2, chan_type, option),
7696 (3, self.context.counterparty_selected_channel_reserve_satoshis, option),
7697 (4, serialized_holder_selected_reserve, option),
7698 (5, self.context.config, required),
7699 (6, serialized_holder_htlc_max_in_flight, option),
7700 (7, self.context.shutdown_scriptpubkey, option),
7701 (8, self.context.blocked_monitor_updates, optional_vec),
7702 (9, self.context.target_closing_feerate_sats_per_kw, option),
7703 (11, self.context.monitor_pending_finalized_fulfills, required_vec),
7704 (13, self.context.channel_creation_height, required),
7705 (15, preimages, required_vec),
7706 (17, self.context.announcement_sigs_state, required),
7707 (19, self.context.latest_inbound_scid_alias, option),
7708 (21, self.context.outbound_scid_alias, required),
7709 (23, channel_ready_event_emitted, option),
7710 (25, user_id_high_opt, option),
7711 (27, self.context.channel_keys_id, required),
7712 (28, holder_max_accepted_htlcs, option),
7713 (29, self.context.temporary_channel_id, option),
7714 (31, channel_pending_event_emitted, option),
7715 (35, pending_outbound_skimmed_fees, optional_vec),
7716 (37, holding_cell_skimmed_fees, optional_vec),
7717 (38, self.context.is_batch_funding, option),
7718 (39, pending_outbound_blinding_points, optional_vec),
7719 (41, holding_cell_blinding_points, optional_vec),
7720 (43, malformed_htlcs, optional_vec), // Added in 0.0.119
7727 const MAX_ALLOC_SIZE: usize = 64*1024;
7728 impl<'a, 'b, 'c, ES: Deref, SP: Deref> ReadableArgs<(&'a ES, &'b SP, u32, &'c ChannelTypeFeatures)> for Channel<SP>
7730 ES::Target: EntropySource,
7731 SP::Target: SignerProvider
7733 fn read<R : io::Read>(reader: &mut R, args: (&'a ES, &'b SP, u32, &'c ChannelTypeFeatures)) -> Result<Self, DecodeError> {
7734 let (entropy_source, signer_provider, serialized_height, our_supported_features) = args;
7735 let ver = read_ver_prefix!(reader, SERIALIZATION_VERSION);
7737 // `user_id` used to be a single u64 value. In order to remain backwards compatible with
7738 // versions prior to 0.0.113, the u128 is serialized as two separate u64 values. We read
7739 // the low bytes now and the high bytes later.
7740 let user_id_low: u64 = Readable::read(reader)?;
7742 let mut config = Some(LegacyChannelConfig::default());
7744 // Read the old serialization of the ChannelConfig from version 0.0.98.
7745 config.as_mut().unwrap().options.forwarding_fee_proportional_millionths = Readable::read(reader)?;
7746 config.as_mut().unwrap().options.cltv_expiry_delta = Readable::read(reader)?;
7747 config.as_mut().unwrap().announced_channel = Readable::read(reader)?;
7748 config.as_mut().unwrap().commit_upfront_shutdown_pubkey = Readable::read(reader)?;
7750 // Read the 8 bytes of backwards-compatibility ChannelConfig data.
7751 let mut _val: u64 = Readable::read(reader)?;
7754 let channel_id = Readable::read(reader)?;
7755 let channel_state = ChannelState::from_u32(Readable::read(reader)?).map_err(|_| DecodeError::InvalidValue)?;
7756 let channel_value_satoshis = Readable::read(reader)?;
7758 let latest_monitor_update_id = Readable::read(reader)?;
7760 let mut keys_data = None;
7762 // Read the serialize signer bytes. We'll choose to deserialize them or not based on whether
7763 // the `channel_keys_id` TLV is present below.
7764 let keys_len: u32 = Readable::read(reader)?;
7765 keys_data = Some(Vec::with_capacity(cmp::min(keys_len as usize, MAX_ALLOC_SIZE)));
7766 while keys_data.as_ref().unwrap().len() != keys_len as usize {
7767 // Read 1KB at a time to avoid accidentally allocating 4GB on corrupted channel keys
7768 let mut data = [0; 1024];
7769 let read_slice = &mut data[0..cmp::min(1024, keys_len as usize - keys_data.as_ref().unwrap().len())];
7770 reader.read_exact(read_slice)?;
7771 keys_data.as_mut().unwrap().extend_from_slice(read_slice);
7775 // Read the old serialization for shutdown_pubkey, preferring the TLV field later if set.
7776 let mut shutdown_scriptpubkey = match <PublicKey as Readable>::read(reader) {
7777 Ok(pubkey) => Some(ShutdownScript::new_p2wpkh_from_pubkey(pubkey)),
7780 let destination_script = Readable::read(reader)?;
7782 let cur_holder_commitment_transaction_number = Readable::read(reader)?;
7783 let cur_counterparty_commitment_transaction_number = Readable::read(reader)?;
7784 let value_to_self_msat = Readable::read(reader)?;
7786 let pending_inbound_htlc_count: u64 = Readable::read(reader)?;
7788 let mut pending_inbound_htlcs = Vec::with_capacity(cmp::min(pending_inbound_htlc_count as usize, DEFAULT_MAX_HTLCS as usize));
7789 for _ in 0..pending_inbound_htlc_count {
7790 pending_inbound_htlcs.push(InboundHTLCOutput {
7791 htlc_id: Readable::read(reader)?,
7792 amount_msat: Readable::read(reader)?,
7793 cltv_expiry: Readable::read(reader)?,
7794 payment_hash: Readable::read(reader)?,
7795 state: match <u8 as Readable>::read(reader)? {
7796 1 => InboundHTLCState::AwaitingRemoteRevokeToAnnounce(Readable::read(reader)?),
7797 2 => InboundHTLCState::AwaitingAnnouncedRemoteRevoke(Readable::read(reader)?),
7798 3 => InboundHTLCState::Committed,
7799 4 => InboundHTLCState::LocalRemoved(Readable::read(reader)?),
7800 _ => return Err(DecodeError::InvalidValue),
7805 let pending_outbound_htlc_count: u64 = Readable::read(reader)?;
7806 let mut pending_outbound_htlcs = Vec::with_capacity(cmp::min(pending_outbound_htlc_count as usize, DEFAULT_MAX_HTLCS as usize));
7807 for _ in 0..pending_outbound_htlc_count {
7808 pending_outbound_htlcs.push(OutboundHTLCOutput {
7809 htlc_id: Readable::read(reader)?,
7810 amount_msat: Readable::read(reader)?,
7811 cltv_expiry: Readable::read(reader)?,
7812 payment_hash: Readable::read(reader)?,
7813 source: Readable::read(reader)?,
7814 state: match <u8 as Readable>::read(reader)? {
7815 0 => OutboundHTLCState::LocalAnnounced(Box::new(Readable::read(reader)?)),
7816 1 => OutboundHTLCState::Committed,
7818 let option: Option<HTLCFailReason> = Readable::read(reader)?;
7819 OutboundHTLCState::RemoteRemoved(option.into())
7822 let option: Option<HTLCFailReason> = Readable::read(reader)?;
7823 OutboundHTLCState::AwaitingRemoteRevokeToRemove(option.into())
7826 let option: Option<HTLCFailReason> = Readable::read(reader)?;
7827 OutboundHTLCState::AwaitingRemovedRemoteRevoke(option.into())
7829 _ => return Err(DecodeError::InvalidValue),
7831 skimmed_fee_msat: None,
7832 blinding_point: None,
7836 let holding_cell_htlc_update_count: u64 = Readable::read(reader)?;
7837 let mut holding_cell_htlc_updates = Vec::with_capacity(cmp::min(holding_cell_htlc_update_count as usize, DEFAULT_MAX_HTLCS as usize*2));
7838 for _ in 0..holding_cell_htlc_update_count {
7839 holding_cell_htlc_updates.push(match <u8 as Readable>::read(reader)? {
7840 0 => HTLCUpdateAwaitingACK::AddHTLC {
7841 amount_msat: Readable::read(reader)?,
7842 cltv_expiry: Readable::read(reader)?,
7843 payment_hash: Readable::read(reader)?,
7844 source: Readable::read(reader)?,
7845 onion_routing_packet: Readable::read(reader)?,
7846 skimmed_fee_msat: None,
7847 blinding_point: None,
7849 1 => HTLCUpdateAwaitingACK::ClaimHTLC {
7850 payment_preimage: Readable::read(reader)?,
7851 htlc_id: Readable::read(reader)?,
7853 2 => HTLCUpdateAwaitingACK::FailHTLC {
7854 htlc_id: Readable::read(reader)?,
7855 err_packet: Readable::read(reader)?,
7857 _ => return Err(DecodeError::InvalidValue),
7861 let resend_order = match <u8 as Readable>::read(reader)? {
7862 0 => RAACommitmentOrder::CommitmentFirst,
7863 1 => RAACommitmentOrder::RevokeAndACKFirst,
7864 _ => return Err(DecodeError::InvalidValue),
7867 let monitor_pending_channel_ready = Readable::read(reader)?;
7868 let monitor_pending_revoke_and_ack = Readable::read(reader)?;
7869 let monitor_pending_commitment_signed = Readable::read(reader)?;
7871 let monitor_pending_forwards_count: u64 = Readable::read(reader)?;
7872 let mut monitor_pending_forwards = Vec::with_capacity(cmp::min(monitor_pending_forwards_count as usize, DEFAULT_MAX_HTLCS as usize));
7873 for _ in 0..monitor_pending_forwards_count {
7874 monitor_pending_forwards.push((Readable::read(reader)?, Readable::read(reader)?));
7877 let monitor_pending_failures_count: u64 = Readable::read(reader)?;
7878 let mut monitor_pending_failures = Vec::with_capacity(cmp::min(monitor_pending_failures_count as usize, DEFAULT_MAX_HTLCS as usize));
7879 for _ in 0..monitor_pending_failures_count {
7880 monitor_pending_failures.push((Readable::read(reader)?, Readable::read(reader)?, Readable::read(reader)?));
7883 let pending_update_fee_value: Option<u32> = Readable::read(reader)?;
7885 let holding_cell_update_fee = Readable::read(reader)?;
7887 let next_holder_htlc_id = Readable::read(reader)?;
7888 let next_counterparty_htlc_id = Readable::read(reader)?;
7889 let update_time_counter = Readable::read(reader)?;
7890 let feerate_per_kw = Readable::read(reader)?;
7892 // Versions prior to 0.0.100 expected to read the fields of `last_sent_closing_fee` here,
7893 // however we are supposed to restart shutdown fee negotiation on reconnect (and wipe
7894 // `last_send_closing_fee` in `remove_uncommitted_htlcs_and_mark_paused`) so we should never
7895 // consider the stale state on reload.
7896 match <u8 as Readable>::read(reader)? {
7899 let _: u32 = Readable::read(reader)?;
7900 let _: u64 = Readable::read(reader)?;
7901 let _: Signature = Readable::read(reader)?;
7903 _ => return Err(DecodeError::InvalidValue),
7906 let funding_tx_confirmed_in = Readable::read(reader)?;
7907 let funding_tx_confirmation_height = Readable::read(reader)?;
7908 let short_channel_id = Readable::read(reader)?;
7910 let counterparty_dust_limit_satoshis = Readable::read(reader)?;
7911 let holder_dust_limit_satoshis = Readable::read(reader)?;
7912 let counterparty_max_htlc_value_in_flight_msat = Readable::read(reader)?;
7913 let mut counterparty_selected_channel_reserve_satoshis = None;
7915 // Read the old serialization from version 0.0.98.
7916 counterparty_selected_channel_reserve_satoshis = Some(Readable::read(reader)?);
7918 // Read the 8 bytes of backwards-compatibility data.
7919 let _dummy: u64 = Readable::read(reader)?;
7921 let counterparty_htlc_minimum_msat = Readable::read(reader)?;
7922 let holder_htlc_minimum_msat = Readable::read(reader)?;
7923 let counterparty_max_accepted_htlcs = Readable::read(reader)?;
7925 let mut minimum_depth = None;
7927 // Read the old serialization from version 0.0.98.
7928 minimum_depth = Some(Readable::read(reader)?);
7930 // Read the 4 bytes of backwards-compatibility data.
7931 let _dummy: u32 = Readable::read(reader)?;
7934 let counterparty_forwarding_info = match <u8 as Readable>::read(reader)? {
7936 1 => Some(CounterpartyForwardingInfo {
7937 fee_base_msat: Readable::read(reader)?,
7938 fee_proportional_millionths: Readable::read(reader)?,
7939 cltv_expiry_delta: Readable::read(reader)?,
7941 _ => return Err(DecodeError::InvalidValue),
7944 let mut channel_parameters: ChannelTransactionParameters = Readable::read(reader)?;
7945 let funding_transaction: Option<Transaction> = Readable::read(reader)?;
7947 let counterparty_cur_commitment_point = Readable::read(reader)?;
7949 let counterparty_prev_commitment_point = Readable::read(reader)?;
7950 let counterparty_node_id = Readable::read(reader)?;
7952 let counterparty_shutdown_scriptpubkey = Readable::read(reader)?;
7953 let commitment_secrets = Readable::read(reader)?;
7955 let channel_update_status = Readable::read(reader)?;
7957 #[cfg(any(test, fuzzing))]
7958 let mut historical_inbound_htlc_fulfills = HashSet::new();
7959 #[cfg(any(test, fuzzing))]
7961 let htlc_fulfills_len: u64 = Readable::read(reader)?;
7962 for _ in 0..htlc_fulfills_len {
7963 assert!(historical_inbound_htlc_fulfills.insert(Readable::read(reader)?));
7967 let pending_update_fee = if let Some(feerate) = pending_update_fee_value {
7968 Some((feerate, if channel_parameters.is_outbound_from_holder {
7969 FeeUpdateState::Outbound
7971 FeeUpdateState::AwaitingRemoteRevokeToAnnounce
7977 let mut announcement_sigs = None;
7978 let mut target_closing_feerate_sats_per_kw = None;
7979 let mut monitor_pending_finalized_fulfills = Some(Vec::new());
7980 let mut holder_selected_channel_reserve_satoshis = Some(get_legacy_default_holder_selected_channel_reserve_satoshis(channel_value_satoshis));
7981 let mut holder_max_htlc_value_in_flight_msat = Some(get_holder_max_htlc_value_in_flight_msat(channel_value_satoshis, &UserConfig::default().channel_handshake_config));
7982 // Prior to supporting channel type negotiation, all of our channels were static_remotekey
7983 // only, so we default to that if none was written.
7984 let mut channel_type = Some(ChannelTypeFeatures::only_static_remote_key());
7985 let mut channel_creation_height = Some(serialized_height);
7986 let mut preimages_opt: Option<Vec<Option<PaymentPreimage>>> = None;
7988 // If we read an old Channel, for simplicity we just treat it as "we never sent an
7989 // AnnouncementSignatures" which implies we'll re-send it on reconnect, but that's fine.
7990 let mut announcement_sigs_state = Some(AnnouncementSigsState::NotSent);
7991 let mut latest_inbound_scid_alias = None;
7992 let mut outbound_scid_alias = None;
7993 let mut channel_pending_event_emitted = None;
7994 let mut channel_ready_event_emitted = None;
7996 let mut user_id_high_opt: Option<u64> = None;
7997 let mut channel_keys_id: Option<[u8; 32]> = None;
7998 let mut temporary_channel_id: Option<ChannelId> = None;
7999 let mut holder_max_accepted_htlcs: Option<u16> = None;
8001 let mut blocked_monitor_updates = Some(Vec::new());
8003 let mut pending_outbound_skimmed_fees_opt: Option<Vec<Option<u64>>> = None;
8004 let mut holding_cell_skimmed_fees_opt: Option<Vec<Option<u64>>> = None;
8006 let mut is_batch_funding: Option<()> = None;
8008 let mut pending_outbound_blinding_points_opt: Option<Vec<Option<PublicKey>>> = None;
8009 let mut holding_cell_blinding_points_opt: Option<Vec<Option<PublicKey>>> = None;
8011 let mut malformed_htlcs: Option<Vec<(u64, u16, [u8; 32])>> = None;
8013 read_tlv_fields!(reader, {
8014 (0, announcement_sigs, option),
8015 (1, minimum_depth, option),
8016 (2, channel_type, option),
8017 (3, counterparty_selected_channel_reserve_satoshis, option),
8018 (4, holder_selected_channel_reserve_satoshis, option),
8019 (5, config, option), // Note that if none is provided we will *not* overwrite the existing one.
8020 (6, holder_max_htlc_value_in_flight_msat, option),
8021 (7, shutdown_scriptpubkey, option),
8022 (8, blocked_monitor_updates, optional_vec),
8023 (9, target_closing_feerate_sats_per_kw, option),
8024 (11, monitor_pending_finalized_fulfills, optional_vec),
8025 (13, channel_creation_height, option),
8026 (15, preimages_opt, optional_vec),
8027 (17, announcement_sigs_state, option),
8028 (19, latest_inbound_scid_alias, option),
8029 (21, outbound_scid_alias, option),
8030 (23, channel_ready_event_emitted, option),
8031 (25, user_id_high_opt, option),
8032 (27, channel_keys_id, option),
8033 (28, holder_max_accepted_htlcs, option),
8034 (29, temporary_channel_id, option),
8035 (31, channel_pending_event_emitted, option),
8036 (35, pending_outbound_skimmed_fees_opt, optional_vec),
8037 (37, holding_cell_skimmed_fees_opt, optional_vec),
8038 (38, is_batch_funding, option),
8039 (39, pending_outbound_blinding_points_opt, optional_vec),
8040 (41, holding_cell_blinding_points_opt, optional_vec),
8041 (43, malformed_htlcs, optional_vec), // Added in 0.0.119
8044 let (channel_keys_id, holder_signer) = if let Some(channel_keys_id) = channel_keys_id {
8045 let mut holder_signer = signer_provider.derive_channel_signer(channel_value_satoshis, channel_keys_id);
8046 // If we've gotten to the funding stage of the channel, populate the signer with its
8047 // required channel parameters.
8048 if channel_state >= ChannelState::FundingNegotiated {
8049 holder_signer.provide_channel_parameters(&channel_parameters);
8051 (channel_keys_id, holder_signer)
8053 // `keys_data` can be `None` if we had corrupted data.
8054 let keys_data = keys_data.ok_or(DecodeError::InvalidValue)?;
8055 let holder_signer = signer_provider.read_chan_signer(&keys_data)?;
8056 (holder_signer.channel_keys_id(), holder_signer)
8059 if let Some(preimages) = preimages_opt {
8060 let mut iter = preimages.into_iter();
8061 for htlc in pending_outbound_htlcs.iter_mut() {
8063 OutboundHTLCState::AwaitingRemoteRevokeToRemove(OutboundHTLCOutcome::Success(None)) => {
8064 htlc.state = OutboundHTLCState::AwaitingRemoteRevokeToRemove(OutboundHTLCOutcome::Success(iter.next().ok_or(DecodeError::InvalidValue)?));
8066 OutboundHTLCState::AwaitingRemovedRemoteRevoke(OutboundHTLCOutcome::Success(None)) => {
8067 htlc.state = OutboundHTLCState::AwaitingRemovedRemoteRevoke(OutboundHTLCOutcome::Success(iter.next().ok_or(DecodeError::InvalidValue)?));
8072 // We expect all preimages to be consumed above
8073 if iter.next().is_some() {
8074 return Err(DecodeError::InvalidValue);
8078 let chan_features = channel_type.as_ref().unwrap();
8079 if !chan_features.is_subset(our_supported_features) {
8080 // If the channel was written by a new version and negotiated with features we don't
8081 // understand yet, refuse to read it.
8082 return Err(DecodeError::UnknownRequiredFeature);
8085 // ChannelTransactionParameters may have had an empty features set upon deserialization.
8086 // To account for that, we're proactively setting/overriding the field here.
8087 channel_parameters.channel_type_features = chan_features.clone();
8089 let mut secp_ctx = Secp256k1::new();
8090 secp_ctx.seeded_randomize(&entropy_source.get_secure_random_bytes());
8092 // `user_id` used to be a single u64 value. In order to remain backwards
8093 // compatible with versions prior to 0.0.113, the u128 is serialized as two
8094 // separate u64 values.
8095 let user_id = user_id_low as u128 + ((user_id_high_opt.unwrap_or(0) as u128) << 64);
8097 let holder_max_accepted_htlcs = holder_max_accepted_htlcs.unwrap_or(DEFAULT_MAX_HTLCS);
8099 if let Some(skimmed_fees) = pending_outbound_skimmed_fees_opt {
8100 let mut iter = skimmed_fees.into_iter();
8101 for htlc in pending_outbound_htlcs.iter_mut() {
8102 htlc.skimmed_fee_msat = iter.next().ok_or(DecodeError::InvalidValue)?;
8104 // We expect all skimmed fees to be consumed above
8105 if iter.next().is_some() { return Err(DecodeError::InvalidValue) }
8107 if let Some(skimmed_fees) = holding_cell_skimmed_fees_opt {
8108 let mut iter = skimmed_fees.into_iter();
8109 for htlc in holding_cell_htlc_updates.iter_mut() {
8110 if let HTLCUpdateAwaitingACK::AddHTLC { ref mut skimmed_fee_msat, .. } = htlc {
8111 *skimmed_fee_msat = iter.next().ok_or(DecodeError::InvalidValue)?;
8114 // We expect all skimmed fees to be consumed above
8115 if iter.next().is_some() { return Err(DecodeError::InvalidValue) }
8117 if let Some(blinding_pts) = pending_outbound_blinding_points_opt {
8118 let mut iter = blinding_pts.into_iter();
8119 for htlc in pending_outbound_htlcs.iter_mut() {
8120 htlc.blinding_point = iter.next().ok_or(DecodeError::InvalidValue)?;
8122 // We expect all blinding points to be consumed above
8123 if iter.next().is_some() { return Err(DecodeError::InvalidValue) }
8125 if let Some(blinding_pts) = holding_cell_blinding_points_opt {
8126 let mut iter = blinding_pts.into_iter();
8127 for htlc in holding_cell_htlc_updates.iter_mut() {
8128 if let HTLCUpdateAwaitingACK::AddHTLC { ref mut blinding_point, .. } = htlc {
8129 *blinding_point = iter.next().ok_or(DecodeError::InvalidValue)?;
8132 // We expect all blinding points to be consumed above
8133 if iter.next().is_some() { return Err(DecodeError::InvalidValue) }
8136 if let Some(malformed_htlcs) = malformed_htlcs {
8137 for (malformed_htlc_id, failure_code, sha256_of_onion) in malformed_htlcs {
8138 let htlc_idx = holding_cell_htlc_updates.iter().position(|htlc| {
8139 if let HTLCUpdateAwaitingACK::FailHTLC { htlc_id, err_packet } = htlc {
8140 let matches = *htlc_id == malformed_htlc_id;
8141 if matches { debug_assert!(err_packet.data.is_empty()) }
8144 }).ok_or(DecodeError::InvalidValue)?;
8145 let malformed_htlc = HTLCUpdateAwaitingACK::FailMalformedHTLC {
8146 htlc_id: malformed_htlc_id, failure_code, sha256_of_onion
8148 let _ = core::mem::replace(&mut holding_cell_htlc_updates[htlc_idx], malformed_htlc);
8153 context: ChannelContext {
8156 config: config.unwrap(),
8160 // Note that we don't care about serializing handshake limits as we only ever serialize
8161 // channel data after the handshake has completed.
8162 inbound_handshake_limits_override: None,
8165 temporary_channel_id,
8167 announcement_sigs_state: announcement_sigs_state.unwrap(),
8169 channel_value_satoshis,
8171 latest_monitor_update_id,
8173 holder_signer: ChannelSignerType::Ecdsa(holder_signer),
8174 shutdown_scriptpubkey,
8177 cur_holder_commitment_transaction_number,
8178 cur_counterparty_commitment_transaction_number,
8181 holder_max_accepted_htlcs,
8182 pending_inbound_htlcs,
8183 pending_outbound_htlcs,
8184 holding_cell_htlc_updates,
8188 monitor_pending_channel_ready,
8189 monitor_pending_revoke_and_ack,
8190 monitor_pending_commitment_signed,
8191 monitor_pending_forwards,
8192 monitor_pending_failures,
8193 monitor_pending_finalized_fulfills: monitor_pending_finalized_fulfills.unwrap(),
8195 signer_pending_commitment_update: false,
8196 signer_pending_funding: false,
8199 holding_cell_update_fee,
8200 next_holder_htlc_id,
8201 next_counterparty_htlc_id,
8202 update_time_counter,
8205 #[cfg(debug_assertions)]
8206 holder_max_commitment_tx_output: Mutex::new((0, 0)),
8207 #[cfg(debug_assertions)]
8208 counterparty_max_commitment_tx_output: Mutex::new((0, 0)),
8210 last_sent_closing_fee: None,
8211 pending_counterparty_closing_signed: None,
8212 expecting_peer_commitment_signed: false,
8213 closing_fee_limits: None,
8214 target_closing_feerate_sats_per_kw,
8216 funding_tx_confirmed_in,
8217 funding_tx_confirmation_height,
8219 channel_creation_height: channel_creation_height.unwrap(),
8221 counterparty_dust_limit_satoshis,
8222 holder_dust_limit_satoshis,
8223 counterparty_max_htlc_value_in_flight_msat,
8224 holder_max_htlc_value_in_flight_msat: holder_max_htlc_value_in_flight_msat.unwrap(),
8225 counterparty_selected_channel_reserve_satoshis,
8226 holder_selected_channel_reserve_satoshis: holder_selected_channel_reserve_satoshis.unwrap(),
8227 counterparty_htlc_minimum_msat,
8228 holder_htlc_minimum_msat,
8229 counterparty_max_accepted_htlcs,
8232 counterparty_forwarding_info,
8234 channel_transaction_parameters: channel_parameters,
8235 funding_transaction,
8238 counterparty_cur_commitment_point,
8239 counterparty_prev_commitment_point,
8240 counterparty_node_id,
8242 counterparty_shutdown_scriptpubkey,
8246 channel_update_status,
8247 closing_signed_in_flight: false,
8251 #[cfg(any(test, fuzzing))]
8252 next_local_commitment_tx_fee_info_cached: Mutex::new(None),
8253 #[cfg(any(test, fuzzing))]
8254 next_remote_commitment_tx_fee_info_cached: Mutex::new(None),
8256 workaround_lnd_bug_4006: None,
8257 sent_message_awaiting_response: None,
8259 latest_inbound_scid_alias,
8260 // Later in the ChannelManager deserialization phase we scan for channels and assign scid aliases if its missing
8261 outbound_scid_alias: outbound_scid_alias.unwrap_or(0),
8263 channel_pending_event_emitted: channel_pending_event_emitted.unwrap_or(true),
8264 channel_ready_event_emitted: channel_ready_event_emitted.unwrap_or(true),
8266 #[cfg(any(test, fuzzing))]
8267 historical_inbound_htlc_fulfills,
8269 channel_type: channel_type.unwrap(),
8272 blocked_monitor_updates: blocked_monitor_updates.unwrap(),
8281 use bitcoin::blockdata::constants::ChainHash;
8282 use bitcoin::blockdata::script::{ScriptBuf, Builder};
8283 use bitcoin::blockdata::transaction::{Transaction, TxOut};
8284 use bitcoin::blockdata::opcodes;
8285 use bitcoin::network::constants::Network;
8286 use crate::ln::onion_utils::INVALID_ONION_BLINDING;
8287 use crate::ln::{PaymentHash, PaymentPreimage};
8288 use crate::ln::channel_keys::{RevocationKey, RevocationBasepoint};
8289 use crate::ln::channelmanager::{self, HTLCSource, PaymentId};
8290 use crate::ln::channel::InitFeatures;
8291 use crate::ln::channel::{AwaitingChannelReadyFlags, Channel, ChannelState, InboundHTLCOutput, OutboundV1Channel, InboundV1Channel, OutboundHTLCOutput, InboundHTLCState, OutboundHTLCState, HTLCCandidate, HTLCInitiator, HTLCUpdateAwaitingACK, commit_tx_fee_msat};
8292 use crate::ln::channel::{MAX_FUNDING_SATOSHIS_NO_WUMBO, TOTAL_BITCOIN_SUPPLY_SATOSHIS, MIN_THEIR_CHAN_RESERVE_SATOSHIS};
8293 use crate::ln::features::{ChannelFeatures, ChannelTypeFeatures, NodeFeatures};
8294 use crate::ln::msgs;
8295 use crate::ln::msgs::{ChannelUpdate, DecodeError, UnsignedChannelUpdate, MAX_VALUE_MSAT};
8296 use crate::ln::script::ShutdownScript;
8297 use crate::ln::chan_utils::{self, htlc_success_tx_weight, htlc_timeout_tx_weight};
8298 use crate::chain::BestBlock;
8299 use crate::chain::chaininterface::{FeeEstimator, LowerBoundedFeeEstimator, ConfirmationTarget};
8300 use crate::sign::{ChannelSigner, InMemorySigner, EntropySource, SignerProvider};
8301 use crate::chain::transaction::OutPoint;
8302 use crate::routing::router::{Path, RouteHop};
8303 use crate::util::config::UserConfig;
8304 use crate::util::errors::APIError;
8305 use crate::util::ser::{ReadableArgs, Writeable};
8306 use crate::util::test_utils;
8307 use crate::util::test_utils::{OnGetShutdownScriptpubkey, TestKeysInterface};
8308 use bitcoin::secp256k1::{Secp256k1, ecdsa::Signature};
8309 use bitcoin::secp256k1::ffi::Signature as FFISignature;
8310 use bitcoin::secp256k1::{SecretKey,PublicKey};
8311 use bitcoin::hashes::sha256::Hash as Sha256;
8312 use bitcoin::hashes::Hash;
8313 use bitcoin::hashes::hex::FromHex;
8314 use bitcoin::hash_types::WPubkeyHash;
8315 use bitcoin::blockdata::locktime::absolute::LockTime;
8316 use bitcoin::address::{WitnessProgram, WitnessVersion};
8317 use crate::prelude::*;
8319 struct TestFeeEstimator {
8322 impl FeeEstimator for TestFeeEstimator {
8323 fn get_est_sat_per_1000_weight(&self, _: ConfirmationTarget) -> u32 {
8329 fn test_max_funding_satoshis_no_wumbo() {
8330 assert_eq!(TOTAL_BITCOIN_SUPPLY_SATOSHIS, 21_000_000 * 100_000_000);
8331 assert!(MAX_FUNDING_SATOSHIS_NO_WUMBO <= TOTAL_BITCOIN_SUPPLY_SATOSHIS,
8332 "MAX_FUNDING_SATOSHIS_NO_WUMBO is greater than all satoshis in existence");
8336 signer: InMemorySigner,
8339 impl EntropySource for Keys {
8340 fn get_secure_random_bytes(&self) -> [u8; 32] { [0; 32] }
8343 impl SignerProvider for Keys {
8344 type EcdsaSigner = InMemorySigner;
8346 type TaprootSigner = InMemorySigner;
8348 fn generate_channel_keys_id(&self, _inbound: bool, _channel_value_satoshis: u64, _user_channel_id: u128) -> [u8; 32] {
8349 self.signer.channel_keys_id()
8352 fn derive_channel_signer(&self, _channel_value_satoshis: u64, _channel_keys_id: [u8; 32]) -> Self::EcdsaSigner {
8356 fn read_chan_signer(&self, _data: &[u8]) -> Result<Self::EcdsaSigner, DecodeError> { panic!(); }
8358 fn get_destination_script(&self, _channel_keys_id: [u8; 32]) -> Result<ScriptBuf, ()> {
8359 let secp_ctx = Secp256k1::signing_only();
8360 let channel_monitor_claim_key = SecretKey::from_slice(&<Vec<u8>>::from_hex("0fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff").unwrap()[..]).unwrap();
8361 let channel_monitor_claim_key_hash = WPubkeyHash::hash(&PublicKey::from_secret_key(&secp_ctx, &channel_monitor_claim_key).serialize());
8362 Ok(Builder::new().push_opcode(opcodes::all::OP_PUSHBYTES_0).push_slice(channel_monitor_claim_key_hash).into_script())
8365 fn get_shutdown_scriptpubkey(&self) -> Result<ShutdownScript, ()> {
8366 let secp_ctx = Secp256k1::signing_only();
8367 let channel_close_key = SecretKey::from_slice(&<Vec<u8>>::from_hex("0fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff").unwrap()[..]).unwrap();
8368 Ok(ShutdownScript::new_p2wpkh_from_pubkey(PublicKey::from_secret_key(&secp_ctx, &channel_close_key)))
8372 #[cfg(all(feature = "_test_vectors", not(feature = "grind_signatures")))]
8373 fn public_from_secret_hex(secp_ctx: &Secp256k1<bitcoin::secp256k1::All>, hex: &str) -> PublicKey {
8374 PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&<Vec<u8>>::from_hex(hex).unwrap()[..]).unwrap())
8378 fn upfront_shutdown_script_incompatibility() {
8379 let features = channelmanager::provided_init_features(&UserConfig::default()).clear_shutdown_anysegwit();
8380 let non_v0_segwit_shutdown_script = ShutdownScript::new_witness_program(
8381 &WitnessProgram::new(WitnessVersion::V16, &[0, 40]).unwrap(),
8384 let seed = [42; 32];
8385 let network = Network::Testnet;
8386 let keys_provider = test_utils::TestKeysInterface::new(&seed, network);
8387 keys_provider.expect(OnGetShutdownScriptpubkey {
8388 returns: non_v0_segwit_shutdown_script.clone(),
8391 let secp_ctx = Secp256k1::new();
8392 let node_id = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[42; 32]).unwrap());
8393 let config = UserConfig::default();
8394 match OutboundV1Channel::<&TestKeysInterface>::new(&LowerBoundedFeeEstimator::new(&TestFeeEstimator { fee_est: 253 }), &&keys_provider, &&keys_provider, node_id, &features, 10000000, 100000, 42, &config, 0, 42, None) {
8395 Err(APIError::IncompatibleShutdownScript { script }) => {
8396 assert_eq!(script.into_inner(), non_v0_segwit_shutdown_script.into_inner());
8398 Err(e) => panic!("Unexpected error: {:?}", e),
8399 Ok(_) => panic!("Expected error"),
8403 // Check that, during channel creation, we use the same feerate in the open channel message
8404 // as we do in the Channel object creation itself.
8406 fn test_open_channel_msg_fee() {
8407 let original_fee = 253;
8408 let mut fee_est = TestFeeEstimator{fee_est: original_fee };
8409 let bounded_fee_estimator = LowerBoundedFeeEstimator::new(&fee_est);
8410 let secp_ctx = Secp256k1::new();
8411 let seed = [42; 32];
8412 let network = Network::Testnet;
8413 let keys_provider = test_utils::TestKeysInterface::new(&seed, network);
8415 let node_a_node_id = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[42; 32]).unwrap());
8416 let config = UserConfig::default();
8417 let node_a_chan = OutboundV1Channel::<&TestKeysInterface>::new(&bounded_fee_estimator, &&keys_provider, &&keys_provider, node_a_node_id, &channelmanager::provided_init_features(&config), 10000000, 100000, 42, &config, 0, 42, None).unwrap();
8419 // Now change the fee so we can check that the fee in the open_channel message is the
8420 // same as the old fee.
8421 fee_est.fee_est = 500;
8422 let open_channel_msg = node_a_chan.get_open_channel(ChainHash::using_genesis_block(network));
8423 assert_eq!(open_channel_msg.feerate_per_kw, original_fee);
8427 fn test_holder_vs_counterparty_dust_limit() {
8428 // Test that when calculating the local and remote commitment transaction fees, the correct
8429 // dust limits are used.
8430 let feeest = LowerBoundedFeeEstimator::new(&TestFeeEstimator{fee_est: 15000});
8431 let secp_ctx = Secp256k1::new();
8432 let seed = [42; 32];
8433 let network = Network::Testnet;
8434 let keys_provider = test_utils::TestKeysInterface::new(&seed, network);
8435 let logger = test_utils::TestLogger::new();
8436 let best_block = BestBlock::from_network(network);
8438 // Go through the flow of opening a channel between two nodes, making sure
8439 // they have different dust limits.
8441 // Create Node A's channel pointing to Node B's pubkey
8442 let node_b_node_id = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[42; 32]).unwrap());
8443 let config = UserConfig::default();
8444 let mut node_a_chan = OutboundV1Channel::<&TestKeysInterface>::new(&feeest, &&keys_provider, &&keys_provider, node_b_node_id, &channelmanager::provided_init_features(&config), 10000000, 100000, 42, &config, 0, 42, None).unwrap();
8446 // Create Node B's channel by receiving Node A's open_channel message
8447 // Make sure A's dust limit is as we expect.
8448 let open_channel_msg = node_a_chan.get_open_channel(ChainHash::using_genesis_block(network));
8449 let node_b_node_id = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[7; 32]).unwrap());
8450 let mut node_b_chan = InboundV1Channel::<&TestKeysInterface>::new(&feeest, &&keys_provider, &&keys_provider, node_b_node_id, &channelmanager::provided_channel_type_features(&config), &channelmanager::provided_init_features(&config), &open_channel_msg, 7, &config, 0, &&logger, /*is_0conf=*/false).unwrap();
8452 // Node B --> Node A: accept channel, explicitly setting B's dust limit.
8453 let mut accept_channel_msg = node_b_chan.accept_inbound_channel();
8454 accept_channel_msg.dust_limit_satoshis = 546;
8455 node_a_chan.accept_channel(&accept_channel_msg, &config.channel_handshake_limits, &channelmanager::provided_init_features(&config)).unwrap();
8456 node_a_chan.context.holder_dust_limit_satoshis = 1560;
8458 // Node A --> Node B: funding created
8459 let output_script = node_a_chan.context.get_funding_redeemscript();
8460 let tx = Transaction { version: 1, lock_time: LockTime::ZERO, input: Vec::new(), output: vec![TxOut {
8461 value: 10000000, script_pubkey: output_script.clone(),
8463 let funding_outpoint = OutPoint{ txid: tx.txid(), index: 0 };
8464 let funding_created_msg = node_a_chan.get_funding_created(tx.clone(), funding_outpoint, false, &&logger).map_err(|_| ()).unwrap();
8465 let (_, funding_signed_msg, _) = node_b_chan.funding_created(&funding_created_msg.unwrap(), best_block, &&keys_provider, &&logger).map_err(|_| ()).unwrap();
8467 // Node B --> Node A: funding signed
8468 let res = node_a_chan.funding_signed(&funding_signed_msg.unwrap(), best_block, &&keys_provider, &&logger);
8469 let (mut node_a_chan, _) = if let Ok(res) = res { res } else { panic!(); };
8471 // Put some inbound and outbound HTLCs in A's channel.
8472 let htlc_amount_msat = 11_092_000; // put an amount below A's effective dust limit but above B's.
8473 node_a_chan.context.pending_inbound_htlcs.push(InboundHTLCOutput {
8475 amount_msat: htlc_amount_msat,
8476 payment_hash: PaymentHash(Sha256::hash(&[42; 32]).to_byte_array()),
8477 cltv_expiry: 300000000,
8478 state: InboundHTLCState::Committed,
8481 node_a_chan.context.pending_outbound_htlcs.push(OutboundHTLCOutput {
8483 amount_msat: htlc_amount_msat, // put an amount below A's dust amount but above B's.
8484 payment_hash: PaymentHash(Sha256::hash(&[43; 32]).to_byte_array()),
8485 cltv_expiry: 200000000,
8486 state: OutboundHTLCState::Committed,
8487 source: HTLCSource::OutboundRoute {
8488 path: Path { hops: Vec::new(), blinded_tail: None },
8489 session_priv: SecretKey::from_slice(&<Vec<u8>>::from_hex("0fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff").unwrap()[..]).unwrap(),
8490 first_hop_htlc_msat: 548,
8491 payment_id: PaymentId([42; 32]),
8493 skimmed_fee_msat: None,
8494 blinding_point: None,
8497 // Make sure when Node A calculates their local commitment transaction, none of the HTLCs pass
8498 // the dust limit check.
8499 let htlc_candidate = HTLCCandidate::new(htlc_amount_msat, HTLCInitiator::LocalOffered);
8500 let local_commit_tx_fee = node_a_chan.context.next_local_commit_tx_fee_msat(htlc_candidate, None);
8501 let local_commit_fee_0_htlcs = commit_tx_fee_msat(node_a_chan.context.feerate_per_kw, 0, node_a_chan.context.get_channel_type());
8502 assert_eq!(local_commit_tx_fee, local_commit_fee_0_htlcs);
8504 // Finally, make sure that when Node A calculates the remote's commitment transaction fees, all
8505 // of the HTLCs are seen to be above the dust limit.
8506 node_a_chan.context.channel_transaction_parameters.is_outbound_from_holder = false;
8507 let remote_commit_fee_3_htlcs = commit_tx_fee_msat(node_a_chan.context.feerate_per_kw, 3, node_a_chan.context.get_channel_type());
8508 let htlc_candidate = HTLCCandidate::new(htlc_amount_msat, HTLCInitiator::LocalOffered);
8509 let remote_commit_tx_fee = node_a_chan.context.next_remote_commit_tx_fee_msat(htlc_candidate, None);
8510 assert_eq!(remote_commit_tx_fee, remote_commit_fee_3_htlcs);
8514 fn test_timeout_vs_success_htlc_dust_limit() {
8515 // Make sure that when `next_remote_commit_tx_fee_msat` and `next_local_commit_tx_fee_msat`
8516 // calculate the real dust limits for HTLCs (i.e. the dust limit given by the counterparty
8517 // *plus* the fees paid for the HTLC) they don't swap `HTLC_SUCCESS_TX_WEIGHT` for
8518 // `HTLC_TIMEOUT_TX_WEIGHT`, and vice versa.
8519 let fee_est = LowerBoundedFeeEstimator::new(&TestFeeEstimator{fee_est: 253 });
8520 let secp_ctx = Secp256k1::new();
8521 let seed = [42; 32];
8522 let network = Network::Testnet;
8523 let keys_provider = test_utils::TestKeysInterface::new(&seed, network);
8525 let node_id = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[42; 32]).unwrap());
8526 let config = UserConfig::default();
8527 let mut chan = OutboundV1Channel::<&TestKeysInterface>::new(&fee_est, &&keys_provider, &&keys_provider, node_id, &channelmanager::provided_init_features(&config), 10000000, 100000, 42, &config, 0, 42, None).unwrap();
8529 let commitment_tx_fee_0_htlcs = commit_tx_fee_msat(chan.context.feerate_per_kw, 0, chan.context.get_channel_type());
8530 let commitment_tx_fee_1_htlc = commit_tx_fee_msat(chan.context.feerate_per_kw, 1, chan.context.get_channel_type());
8532 // If HTLC_SUCCESS_TX_WEIGHT and HTLC_TIMEOUT_TX_WEIGHT were swapped: then this HTLC would be
8533 // counted as dust when it shouldn't be.
8534 let htlc_amt_above_timeout = ((253 * htlc_timeout_tx_weight(chan.context.get_channel_type()) / 1000) + chan.context.holder_dust_limit_satoshis + 1) * 1000;
8535 let htlc_candidate = HTLCCandidate::new(htlc_amt_above_timeout, HTLCInitiator::LocalOffered);
8536 let commitment_tx_fee = chan.context.next_local_commit_tx_fee_msat(htlc_candidate, None);
8537 assert_eq!(commitment_tx_fee, commitment_tx_fee_1_htlc);
8539 // If swapped: this HTLC would be counted as non-dust when it shouldn't be.
8540 let dust_htlc_amt_below_success = ((253 * htlc_success_tx_weight(chan.context.get_channel_type()) / 1000) + chan.context.holder_dust_limit_satoshis - 1) * 1000;
8541 let htlc_candidate = HTLCCandidate::new(dust_htlc_amt_below_success, HTLCInitiator::RemoteOffered);
8542 let commitment_tx_fee = chan.context.next_local_commit_tx_fee_msat(htlc_candidate, None);
8543 assert_eq!(commitment_tx_fee, commitment_tx_fee_0_htlcs);
8545 chan.context.channel_transaction_parameters.is_outbound_from_holder = false;
8547 // If swapped: this HTLC would be counted as non-dust when it shouldn't be.
8548 let dust_htlc_amt_above_timeout = ((253 * htlc_timeout_tx_weight(chan.context.get_channel_type()) / 1000) + chan.context.counterparty_dust_limit_satoshis + 1) * 1000;
8549 let htlc_candidate = HTLCCandidate::new(dust_htlc_amt_above_timeout, HTLCInitiator::LocalOffered);
8550 let commitment_tx_fee = chan.context.next_remote_commit_tx_fee_msat(htlc_candidate, None);
8551 assert_eq!(commitment_tx_fee, commitment_tx_fee_0_htlcs);
8553 // If swapped: this HTLC would be counted as dust when it shouldn't be.
8554 let htlc_amt_below_success = ((253 * htlc_success_tx_weight(chan.context.get_channel_type()) / 1000) + chan.context.counterparty_dust_limit_satoshis - 1) * 1000;
8555 let htlc_candidate = HTLCCandidate::new(htlc_amt_below_success, HTLCInitiator::RemoteOffered);
8556 let commitment_tx_fee = chan.context.next_remote_commit_tx_fee_msat(htlc_candidate, None);
8557 assert_eq!(commitment_tx_fee, commitment_tx_fee_1_htlc);
8561 fn channel_reestablish_no_updates() {
8562 let feeest = LowerBoundedFeeEstimator::new(&TestFeeEstimator{fee_est: 15000});
8563 let logger = test_utils::TestLogger::new();
8564 let secp_ctx = Secp256k1::new();
8565 let seed = [42; 32];
8566 let network = Network::Testnet;
8567 let best_block = BestBlock::from_network(network);
8568 let chain_hash = ChainHash::using_genesis_block(network);
8569 let keys_provider = test_utils::TestKeysInterface::new(&seed, network);
8571 // Go through the flow of opening a channel between two nodes.
8573 // Create Node A's channel pointing to Node B's pubkey
8574 let node_b_node_id = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[42; 32]).unwrap());
8575 let config = UserConfig::default();
8576 let mut node_a_chan = OutboundV1Channel::<&TestKeysInterface>::new(&feeest, &&keys_provider, &&keys_provider, node_b_node_id, &channelmanager::provided_init_features(&config), 10000000, 100000, 42, &config, 0, 42, None).unwrap();
8578 // Create Node B's channel by receiving Node A's open_channel message
8579 let open_channel_msg = node_a_chan.get_open_channel(chain_hash);
8580 let node_b_node_id = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[7; 32]).unwrap());
8581 let mut node_b_chan = InboundV1Channel::<&TestKeysInterface>::new(&feeest, &&keys_provider, &&keys_provider, node_b_node_id, &channelmanager::provided_channel_type_features(&config), &channelmanager::provided_init_features(&config), &open_channel_msg, 7, &config, 0, &&logger, /*is_0conf=*/false).unwrap();
8583 // Node B --> Node A: accept channel
8584 let accept_channel_msg = node_b_chan.accept_inbound_channel();
8585 node_a_chan.accept_channel(&accept_channel_msg, &config.channel_handshake_limits, &channelmanager::provided_init_features(&config)).unwrap();
8587 // Node A --> Node B: funding created
8588 let output_script = node_a_chan.context.get_funding_redeemscript();
8589 let tx = Transaction { version: 1, lock_time: LockTime::ZERO, input: Vec::new(), output: vec![TxOut {
8590 value: 10000000, script_pubkey: output_script.clone(),
8592 let funding_outpoint = OutPoint{ txid: tx.txid(), index: 0 };
8593 let funding_created_msg = node_a_chan.get_funding_created(tx.clone(), funding_outpoint, false, &&logger).map_err(|_| ()).unwrap();
8594 let (mut node_b_chan, funding_signed_msg, _) = node_b_chan.funding_created(&funding_created_msg.unwrap(), best_block, &&keys_provider, &&logger).map_err(|_| ()).unwrap();
8596 // Node B --> Node A: funding signed
8597 let res = node_a_chan.funding_signed(&funding_signed_msg.unwrap(), best_block, &&keys_provider, &&logger);
8598 let (mut node_a_chan, _) = if let Ok(res) = res { res } else { panic!(); };
8600 // Now disconnect the two nodes and check that the commitment point in
8601 // Node B's channel_reestablish message is sane.
8602 assert!(node_b_chan.remove_uncommitted_htlcs_and_mark_paused(&&logger).is_ok());
8603 let msg = node_b_chan.get_channel_reestablish(&&logger);
8604 assert_eq!(msg.next_local_commitment_number, 1); // now called next_commitment_number
8605 assert_eq!(msg.next_remote_commitment_number, 0); // now called next_revocation_number
8606 assert_eq!(msg.your_last_per_commitment_secret, [0; 32]);
8608 // Check that the commitment point in Node A's channel_reestablish message
8610 assert!(node_a_chan.remove_uncommitted_htlcs_and_mark_paused(&&logger).is_ok());
8611 let msg = node_a_chan.get_channel_reestablish(&&logger);
8612 assert_eq!(msg.next_local_commitment_number, 1); // now called next_commitment_number
8613 assert_eq!(msg.next_remote_commitment_number, 0); // now called next_revocation_number
8614 assert_eq!(msg.your_last_per_commitment_secret, [0; 32]);
8618 fn test_configured_holder_max_htlc_value_in_flight() {
8619 let feeest = LowerBoundedFeeEstimator::new(&TestFeeEstimator{fee_est: 15000});
8620 let logger = test_utils::TestLogger::new();
8621 let secp_ctx = Secp256k1::new();
8622 let seed = [42; 32];
8623 let network = Network::Testnet;
8624 let keys_provider = test_utils::TestKeysInterface::new(&seed, network);
8625 let outbound_node_id = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[42; 32]).unwrap());
8626 let inbound_node_id = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[7; 32]).unwrap());
8628 let mut config_2_percent = UserConfig::default();
8629 config_2_percent.channel_handshake_config.max_inbound_htlc_value_in_flight_percent_of_channel = 2;
8630 let mut config_99_percent = UserConfig::default();
8631 config_99_percent.channel_handshake_config.max_inbound_htlc_value_in_flight_percent_of_channel = 99;
8632 let mut config_0_percent = UserConfig::default();
8633 config_0_percent.channel_handshake_config.max_inbound_htlc_value_in_flight_percent_of_channel = 0;
8634 let mut config_101_percent = UserConfig::default();
8635 config_101_percent.channel_handshake_config.max_inbound_htlc_value_in_flight_percent_of_channel = 101;
8637 // Test that `OutboundV1Channel::new` creates a channel with the correct value for
8638 // `holder_max_htlc_value_in_flight_msat`, when configured with a valid percentage value,
8639 // which is set to the lower bound + 1 (2%) of the `channel_value`.
8640 let chan_1 = OutboundV1Channel::<&TestKeysInterface>::new(&feeest, &&keys_provider, &&keys_provider, outbound_node_id, &channelmanager::provided_init_features(&config_2_percent), 10000000, 100000, 42, &config_2_percent, 0, 42, None).unwrap();
8641 let chan_1_value_msat = chan_1.context.channel_value_satoshis * 1000;
8642 assert_eq!(chan_1.context.holder_max_htlc_value_in_flight_msat, (chan_1_value_msat as f64 * 0.02) as u64);
8644 // Test with the upper bound - 1 of valid values (99%).
8645 let chan_2 = OutboundV1Channel::<&TestKeysInterface>::new(&feeest, &&keys_provider, &&keys_provider, outbound_node_id, &channelmanager::provided_init_features(&config_99_percent), 10000000, 100000, 42, &config_99_percent, 0, 42, None).unwrap();
8646 let chan_2_value_msat = chan_2.context.channel_value_satoshis * 1000;
8647 assert_eq!(chan_2.context.holder_max_htlc_value_in_flight_msat, (chan_2_value_msat as f64 * 0.99) as u64);
8649 let chan_1_open_channel_msg = chan_1.get_open_channel(ChainHash::using_genesis_block(network));
8651 // Test that `InboundV1Channel::new` creates a channel with the correct value for
8652 // `holder_max_htlc_value_in_flight_msat`, when configured with a valid percentage value,
8653 // which is set to the lower bound - 1 (2%) of the `channel_value`.
8654 let chan_3 = InboundV1Channel::<&TestKeysInterface>::new(&feeest, &&keys_provider, &&keys_provider, inbound_node_id, &channelmanager::provided_channel_type_features(&config_2_percent), &channelmanager::provided_init_features(&config_2_percent), &chan_1_open_channel_msg, 7, &config_2_percent, 0, &&logger, /*is_0conf=*/false).unwrap();
8655 let chan_3_value_msat = chan_3.context.channel_value_satoshis * 1000;
8656 assert_eq!(chan_3.context.holder_max_htlc_value_in_flight_msat, (chan_3_value_msat as f64 * 0.02) as u64);
8658 // Test with the upper bound - 1 of valid values (99%).
8659 let chan_4 = InboundV1Channel::<&TestKeysInterface>::new(&feeest, &&keys_provider, &&keys_provider, inbound_node_id, &channelmanager::provided_channel_type_features(&config_99_percent), &channelmanager::provided_init_features(&config_99_percent), &chan_1_open_channel_msg, 7, &config_99_percent, 0, &&logger, /*is_0conf=*/false).unwrap();
8660 let chan_4_value_msat = chan_4.context.channel_value_satoshis * 1000;
8661 assert_eq!(chan_4.context.holder_max_htlc_value_in_flight_msat, (chan_4_value_msat as f64 * 0.99) as u64);
8663 // Test that `OutboundV1Channel::new` uses the lower bound of the configurable percentage values (1%)
8664 // if `max_inbound_htlc_value_in_flight_percent_of_channel` is set to a value less than 1.
8665 let chan_5 = OutboundV1Channel::<&TestKeysInterface>::new(&feeest, &&keys_provider, &&keys_provider, outbound_node_id, &channelmanager::provided_init_features(&config_0_percent), 10000000, 100000, 42, &config_0_percent, 0, 42, None).unwrap();
8666 let chan_5_value_msat = chan_5.context.channel_value_satoshis * 1000;
8667 assert_eq!(chan_5.context.holder_max_htlc_value_in_flight_msat, (chan_5_value_msat as f64 * 0.01) as u64);
8669 // Test that `OutboundV1Channel::new` uses the upper bound of the configurable percentage values
8670 // (100%) if `max_inbound_htlc_value_in_flight_percent_of_channel` is set to a larger value
8672 let chan_6 = OutboundV1Channel::<&TestKeysInterface>::new(&feeest, &&keys_provider, &&keys_provider, outbound_node_id, &channelmanager::provided_init_features(&config_101_percent), 10000000, 100000, 42, &config_101_percent, 0, 42, None).unwrap();
8673 let chan_6_value_msat = chan_6.context.channel_value_satoshis * 1000;
8674 assert_eq!(chan_6.context.holder_max_htlc_value_in_flight_msat, chan_6_value_msat);
8676 // Test that `InboundV1Channel::new` uses the lower bound of the configurable percentage values (1%)
8677 // if `max_inbound_htlc_value_in_flight_percent_of_channel` is set to a value less than 1.
8678 let chan_7 = InboundV1Channel::<&TestKeysInterface>::new(&feeest, &&keys_provider, &&keys_provider, inbound_node_id, &channelmanager::provided_channel_type_features(&config_0_percent), &channelmanager::provided_init_features(&config_0_percent), &chan_1_open_channel_msg, 7, &config_0_percent, 0, &&logger, /*is_0conf=*/false).unwrap();
8679 let chan_7_value_msat = chan_7.context.channel_value_satoshis * 1000;
8680 assert_eq!(chan_7.context.holder_max_htlc_value_in_flight_msat, (chan_7_value_msat as f64 * 0.01) as u64);
8682 // Test that `InboundV1Channel::new` uses the upper bound of the configurable percentage values
8683 // (100%) if `max_inbound_htlc_value_in_flight_percent_of_channel` is set to a larger value
8685 let chan_8 = InboundV1Channel::<&TestKeysInterface>::new(&feeest, &&keys_provider, &&keys_provider, inbound_node_id, &channelmanager::provided_channel_type_features(&config_101_percent), &channelmanager::provided_init_features(&config_101_percent), &chan_1_open_channel_msg, 7, &config_101_percent, 0, &&logger, /*is_0conf=*/false).unwrap();
8686 let chan_8_value_msat = chan_8.context.channel_value_satoshis * 1000;
8687 assert_eq!(chan_8.context.holder_max_htlc_value_in_flight_msat, chan_8_value_msat);
8691 fn test_configured_holder_selected_channel_reserve_satoshis() {
8693 // Test that `OutboundV1Channel::new` and `InboundV1Channel::new` create a channel with the correct
8694 // channel reserves, when `their_channel_reserve_proportional_millionths` is configured.
8695 test_self_and_counterparty_channel_reserve(10_000_000, 0.02, 0.02);
8697 // Test with valid but unreasonably high channel reserves
8698 // Requesting and accepting parties have requested for 49%-49% and 60%-30% channel reserve
8699 test_self_and_counterparty_channel_reserve(10_000_000, 0.49, 0.49);
8700 test_self_and_counterparty_channel_reserve(10_000_000, 0.60, 0.30);
8702 // Test with calculated channel reserve less than lower bound
8703 // i.e `MIN_THEIR_CHAN_RESERVE_SATOSHIS`
8704 test_self_and_counterparty_channel_reserve(100_000, 0.00002, 0.30);
8706 // Test with invalid channel reserves since sum of both is greater than or equal
8708 test_self_and_counterparty_channel_reserve(10_000_000, 0.50, 0.50);
8709 test_self_and_counterparty_channel_reserve(10_000_000, 0.60, 0.50);
8712 fn test_self_and_counterparty_channel_reserve(channel_value_satoshis: u64, outbound_selected_channel_reserve_perc: f64, inbound_selected_channel_reserve_perc: f64) {
8713 let fee_est = LowerBoundedFeeEstimator::new(&TestFeeEstimator { fee_est: 15_000 });
8714 let logger = test_utils::TestLogger::new();
8715 let secp_ctx = Secp256k1::new();
8716 let seed = [42; 32];
8717 let network = Network::Testnet;
8718 let keys_provider = test_utils::TestKeysInterface::new(&seed, network);
8719 let outbound_node_id = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[42; 32]).unwrap());
8720 let inbound_node_id = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[7; 32]).unwrap());
8723 let mut outbound_node_config = UserConfig::default();
8724 outbound_node_config.channel_handshake_config.their_channel_reserve_proportional_millionths = (outbound_selected_channel_reserve_perc * 1_000_000.0) as u32;
8725 let chan = OutboundV1Channel::<&TestKeysInterface>::new(&&fee_est, &&keys_provider, &&keys_provider, outbound_node_id, &channelmanager::provided_init_features(&outbound_node_config), channel_value_satoshis, 100_000, 42, &outbound_node_config, 0, 42, None).unwrap();
8727 let expected_outbound_selected_chan_reserve = cmp::max(MIN_THEIR_CHAN_RESERVE_SATOSHIS, (chan.context.channel_value_satoshis as f64 * outbound_selected_channel_reserve_perc) as u64);
8728 assert_eq!(chan.context.holder_selected_channel_reserve_satoshis, expected_outbound_selected_chan_reserve);
8730 let chan_open_channel_msg = chan.get_open_channel(ChainHash::using_genesis_block(network));
8731 let mut inbound_node_config = UserConfig::default();
8732 inbound_node_config.channel_handshake_config.their_channel_reserve_proportional_millionths = (inbound_selected_channel_reserve_perc * 1_000_000.0) as u32;
8734 if outbound_selected_channel_reserve_perc + inbound_selected_channel_reserve_perc < 1.0 {
8735 let chan_inbound_node = InboundV1Channel::<&TestKeysInterface>::new(&&fee_est, &&keys_provider, &&keys_provider, inbound_node_id, &channelmanager::provided_channel_type_features(&inbound_node_config), &channelmanager::provided_init_features(&outbound_node_config), &chan_open_channel_msg, 7, &inbound_node_config, 0, &&logger, /*is_0conf=*/false).unwrap();
8737 let expected_inbound_selected_chan_reserve = cmp::max(MIN_THEIR_CHAN_RESERVE_SATOSHIS, (chan.context.channel_value_satoshis as f64 * inbound_selected_channel_reserve_perc) as u64);
8739 assert_eq!(chan_inbound_node.context.holder_selected_channel_reserve_satoshis, expected_inbound_selected_chan_reserve);
8740 assert_eq!(chan_inbound_node.context.counterparty_selected_channel_reserve_satoshis.unwrap(), expected_outbound_selected_chan_reserve);
8742 // Channel Negotiations failed
8743 let result = InboundV1Channel::<&TestKeysInterface>::new(&&fee_est, &&keys_provider, &&keys_provider, inbound_node_id, &channelmanager::provided_channel_type_features(&inbound_node_config), &channelmanager::provided_init_features(&outbound_node_config), &chan_open_channel_msg, 7, &inbound_node_config, 0, &&logger, /*is_0conf=*/false);
8744 assert!(result.is_err());
8749 fn channel_update() {
8750 let feeest = LowerBoundedFeeEstimator::new(&TestFeeEstimator{fee_est: 15000});
8751 let logger = test_utils::TestLogger::new();
8752 let secp_ctx = Secp256k1::new();
8753 let seed = [42; 32];
8754 let network = Network::Testnet;
8755 let best_block = BestBlock::from_network(network);
8756 let chain_hash = ChainHash::using_genesis_block(network);
8757 let keys_provider = test_utils::TestKeysInterface::new(&seed, network);
8759 // Create Node A's channel pointing to Node B's pubkey
8760 let node_b_node_id = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[42; 32]).unwrap());
8761 let config = UserConfig::default();
8762 let mut node_a_chan = OutboundV1Channel::<&TestKeysInterface>::new(&feeest, &&keys_provider, &&keys_provider, node_b_node_id, &channelmanager::provided_init_features(&config), 10000000, 100000, 42, &config, 0, 42, None).unwrap();
8764 // Create Node B's channel by receiving Node A's open_channel message
8765 // Make sure A's dust limit is as we expect.
8766 let open_channel_msg = node_a_chan.get_open_channel(ChainHash::using_genesis_block(network));
8767 let node_b_node_id = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[7; 32]).unwrap());
8768 let mut node_b_chan = InboundV1Channel::<&TestKeysInterface>::new(&feeest, &&keys_provider, &&keys_provider, node_b_node_id, &channelmanager::provided_channel_type_features(&config), &channelmanager::provided_init_features(&config), &open_channel_msg, 7, &config, 0, &&logger, /*is_0conf=*/false).unwrap();
8770 // Node B --> Node A: accept channel, explicitly setting B's dust limit.
8771 let mut accept_channel_msg = node_b_chan.accept_inbound_channel();
8772 accept_channel_msg.dust_limit_satoshis = 546;
8773 node_a_chan.accept_channel(&accept_channel_msg, &config.channel_handshake_limits, &channelmanager::provided_init_features(&config)).unwrap();
8774 node_a_chan.context.holder_dust_limit_satoshis = 1560;
8776 // Node A --> Node B: funding created
8777 let output_script = node_a_chan.context.get_funding_redeemscript();
8778 let tx = Transaction { version: 1, lock_time: LockTime::ZERO, input: Vec::new(), output: vec![TxOut {
8779 value: 10000000, script_pubkey: output_script.clone(),
8781 let funding_outpoint = OutPoint{ txid: tx.txid(), index: 0 };
8782 let funding_created_msg = node_a_chan.get_funding_created(tx.clone(), funding_outpoint, false, &&logger).map_err(|_| ()).unwrap();
8783 let (_, funding_signed_msg, _) = node_b_chan.funding_created(&funding_created_msg.unwrap(), best_block, &&keys_provider, &&logger).map_err(|_| ()).unwrap();
8785 // Node B --> Node A: funding signed
8786 let res = node_a_chan.funding_signed(&funding_signed_msg.unwrap(), best_block, &&keys_provider, &&logger);
8787 let (mut node_a_chan, _) = if let Ok(res) = res { res } else { panic!(); };
8789 // Make sure that receiving a channel update will update the Channel as expected.
8790 let update = ChannelUpdate {
8791 contents: UnsignedChannelUpdate {
8793 short_channel_id: 0,
8796 cltv_expiry_delta: 100,
8797 htlc_minimum_msat: 5,
8798 htlc_maximum_msat: MAX_VALUE_MSAT,
8800 fee_proportional_millionths: 11,
8801 excess_data: Vec::new(),
8803 signature: Signature::from(unsafe { FFISignature::new() })
8805 assert!(node_a_chan.channel_update(&update).unwrap());
8807 // The counterparty can send an update with a higher minimum HTLC, but that shouldn't
8808 // change our official htlc_minimum_msat.
8809 assert_eq!(node_a_chan.context.holder_htlc_minimum_msat, 1);
8810 match node_a_chan.context.counterparty_forwarding_info() {
8812 assert_eq!(info.cltv_expiry_delta, 100);
8813 assert_eq!(info.fee_base_msat, 110);
8814 assert_eq!(info.fee_proportional_millionths, 11);
8816 None => panic!("expected counterparty forwarding info to be Some")
8819 assert!(!node_a_chan.channel_update(&update).unwrap());
8823 fn blinding_point_skimmed_fee_malformed_ser() {
8824 // Ensure that channel blinding points, skimmed fees, and malformed HTLCs are (de)serialized
8826 let feeest = LowerBoundedFeeEstimator::new(&TestFeeEstimator{fee_est: 15000});
8827 let secp_ctx = Secp256k1::new();
8828 let seed = [42; 32];
8829 let network = Network::Testnet;
8830 let keys_provider = test_utils::TestKeysInterface::new(&seed, network);
8832 let node_b_node_id = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[42; 32]).unwrap());
8833 let config = UserConfig::default();
8834 let features = channelmanager::provided_init_features(&config);
8835 let outbound_chan = OutboundV1Channel::<&TestKeysInterface>::new(&feeest, &&keys_provider, &&keys_provider, node_b_node_id, &features, 10000000, 100000, 42, &config, 0, 42, None).unwrap();
8836 let mut chan = Channel { context: outbound_chan.context };
8838 let dummy_htlc_source = HTLCSource::OutboundRoute {
8840 hops: vec![RouteHop {
8841 pubkey: test_utils::pubkey(2), channel_features: ChannelFeatures::empty(),
8842 node_features: NodeFeatures::empty(), short_channel_id: 0, fee_msat: 0,
8843 cltv_expiry_delta: 0, maybe_announced_channel: false,
8847 session_priv: test_utils::privkey(42),
8848 first_hop_htlc_msat: 0,
8849 payment_id: PaymentId([42; 32]),
8851 let dummy_outbound_output = OutboundHTLCOutput {
8854 payment_hash: PaymentHash([43; 32]),
8856 state: OutboundHTLCState::Committed,
8857 source: dummy_htlc_source.clone(),
8858 skimmed_fee_msat: None,
8859 blinding_point: None,
8861 let mut pending_outbound_htlcs = vec![dummy_outbound_output.clone(); 10];
8862 for (idx, htlc) in pending_outbound_htlcs.iter_mut().enumerate() {
8864 htlc.blinding_point = Some(test_utils::pubkey(42 + idx as u8));
8867 htlc.skimmed_fee_msat = Some(1);
8870 chan.context.pending_outbound_htlcs = pending_outbound_htlcs.clone();
8872 let dummy_holding_cell_add_htlc = HTLCUpdateAwaitingACK::AddHTLC {
8875 payment_hash: PaymentHash([43; 32]),
8876 source: dummy_htlc_source.clone(),
8877 onion_routing_packet: msgs::OnionPacket {
8879 public_key: Ok(test_utils::pubkey(1)),
8880 hop_data: [0; 20*65],
8883 skimmed_fee_msat: None,
8884 blinding_point: None,
8886 let dummy_holding_cell_claim_htlc = HTLCUpdateAwaitingACK::ClaimHTLC {
8887 payment_preimage: PaymentPreimage([42; 32]),
8890 let dummy_holding_cell_failed_htlc = |htlc_id| HTLCUpdateAwaitingACK::FailHTLC {
8891 htlc_id, err_packet: msgs::OnionErrorPacket { data: vec![42] }
8893 let dummy_holding_cell_malformed_htlc = |htlc_id| HTLCUpdateAwaitingACK::FailMalformedHTLC {
8894 htlc_id, failure_code: INVALID_ONION_BLINDING, sha256_of_onion: [0; 32],
8896 let mut holding_cell_htlc_updates = Vec::with_capacity(12);
8899 holding_cell_htlc_updates.push(dummy_holding_cell_add_htlc.clone());
8900 } else if i % 5 == 1 {
8901 holding_cell_htlc_updates.push(dummy_holding_cell_claim_htlc.clone());
8902 } else if i % 5 == 2 {
8903 let mut dummy_add = dummy_holding_cell_add_htlc.clone();
8904 if let HTLCUpdateAwaitingACK::AddHTLC {
8905 ref mut blinding_point, ref mut skimmed_fee_msat, ..
8906 } = &mut dummy_add {
8907 *blinding_point = Some(test_utils::pubkey(42 + i));
8908 *skimmed_fee_msat = Some(42);
8910 holding_cell_htlc_updates.push(dummy_add);
8911 } else if i % 5 == 3 {
8912 holding_cell_htlc_updates.push(dummy_holding_cell_malformed_htlc(i as u64));
8914 holding_cell_htlc_updates.push(dummy_holding_cell_failed_htlc(i as u64));
8917 chan.context.holding_cell_htlc_updates = holding_cell_htlc_updates.clone();
8919 // Encode and decode the channel and ensure that the HTLCs within are the same.
8920 let encoded_chan = chan.encode();
8921 let mut s = crate::io::Cursor::new(&encoded_chan);
8922 let mut reader = crate::util::ser::FixedLengthReader::new(&mut s, encoded_chan.len() as u64);
8923 let features = channelmanager::provided_channel_type_features(&config);
8924 let decoded_chan = Channel::read(&mut reader, (&&keys_provider, &&keys_provider, 0, &features)).unwrap();
8925 assert_eq!(decoded_chan.context.pending_outbound_htlcs, pending_outbound_htlcs);
8926 assert_eq!(decoded_chan.context.holding_cell_htlc_updates, holding_cell_htlc_updates);
8929 #[cfg(all(feature = "_test_vectors", not(feature = "grind_signatures")))]
8931 fn outbound_commitment_test() {
8932 use bitcoin::sighash;
8933 use bitcoin::consensus::encode::serialize;
8934 use bitcoin::sighash::EcdsaSighashType;
8935 use bitcoin::hashes::hex::FromHex;
8936 use bitcoin::hash_types::Txid;
8937 use bitcoin::secp256k1::Message;
8938 use crate::sign::{ChannelDerivationParameters, HTLCDescriptor, ecdsa::EcdsaChannelSigner};
8939 use crate::ln::PaymentPreimage;
8940 use crate::ln::channel::{HTLCOutputInCommitment ,TxCreationKeys};
8941 use crate::ln::channel_keys::{DelayedPaymentBasepoint, HtlcBasepoint};
8942 use crate::ln::chan_utils::{ChannelPublicKeys, HolderCommitmentTransaction, CounterpartyChannelTransactionParameters};
8943 use crate::util::logger::Logger;
8944 use crate::sync::Arc;
8945 use core::str::FromStr;
8946 use hex::DisplayHex;
8948 // Test vectors from BOLT 3 Appendices C and F (anchors):
8949 let feeest = TestFeeEstimator{fee_est: 15000};
8950 let logger : Arc<dyn Logger> = Arc::new(test_utils::TestLogger::new());
8951 let secp_ctx = Secp256k1::new();
8953 let mut signer = InMemorySigner::new(
8955 SecretKey::from_slice(&<Vec<u8>>::from_hex("30ff4956bbdd3222d44cc5e8a1261dab1e07957bdac5ae88fe3261ef321f3749").unwrap()[..]).unwrap(),
8956 SecretKey::from_slice(&<Vec<u8>>::from_hex("0fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff").unwrap()[..]).unwrap(),
8957 SecretKey::from_slice(&<Vec<u8>>::from_hex("1111111111111111111111111111111111111111111111111111111111111111").unwrap()[..]).unwrap(),
8958 SecretKey::from_slice(&<Vec<u8>>::from_hex("3333333333333333333333333333333333333333333333333333333333333333").unwrap()[..]).unwrap(),
8959 SecretKey::from_slice(&<Vec<u8>>::from_hex("1111111111111111111111111111111111111111111111111111111111111111").unwrap()[..]).unwrap(),
8961 // These aren't set in the test vectors:
8962 [0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff],
8968 assert_eq!(signer.pubkeys().funding_pubkey.serialize()[..],
8969 <Vec<u8>>::from_hex("023da092f6980e58d2c037173180e9a465476026ee50f96695963e8efe436f54eb").unwrap()[..]);
8970 let keys_provider = Keys { signer: signer.clone() };
8972 let counterparty_node_id = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[42; 32]).unwrap());
8973 let mut config = UserConfig::default();
8974 config.channel_handshake_config.announced_channel = false;
8975 let mut chan = OutboundV1Channel::<&Keys>::new(&LowerBoundedFeeEstimator::new(&feeest), &&keys_provider, &&keys_provider, counterparty_node_id, &channelmanager::provided_init_features(&config), 10_000_000, 0, 42, &config, 0, 42, None).unwrap(); // Nothing uses their network key in this test
8976 chan.context.holder_dust_limit_satoshis = 546;
8977 chan.context.counterparty_selected_channel_reserve_satoshis = Some(0); // Filled in in accept_channel
8979 let funding_info = OutPoint{ txid: Txid::from_str("8984484a580b825b9972d7adb15050b3ab624ccd731946b3eeddb92f4e7ef6be").unwrap(), index: 0 };
8981 let counterparty_pubkeys = ChannelPublicKeys {
8982 funding_pubkey: public_from_secret_hex(&secp_ctx, "1552dfba4f6cf29a62a0af13c8d6981d36d0ef8d61ba10fb0fe90da7634d7e13"),
8983 revocation_basepoint: RevocationBasepoint::from(PublicKey::from_slice(&<Vec<u8>>::from_hex("02466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f27").unwrap()[..]).unwrap()),
8984 payment_point: public_from_secret_hex(&secp_ctx, "4444444444444444444444444444444444444444444444444444444444444444"),
8985 delayed_payment_basepoint: DelayedPaymentBasepoint::from(public_from_secret_hex(&secp_ctx, "1552dfba4f6cf29a62a0af13c8d6981d36d0ef8d61ba10fb0fe90da7634d7e13")),
8986 htlc_basepoint: HtlcBasepoint::from(public_from_secret_hex(&secp_ctx, "4444444444444444444444444444444444444444444444444444444444444444"))
8988 chan.context.channel_transaction_parameters.counterparty_parameters = Some(
8989 CounterpartyChannelTransactionParameters {
8990 pubkeys: counterparty_pubkeys.clone(),
8991 selected_contest_delay: 144
8993 chan.context.channel_transaction_parameters.funding_outpoint = Some(funding_info);
8994 signer.provide_channel_parameters(&chan.context.channel_transaction_parameters);
8996 assert_eq!(counterparty_pubkeys.payment_point.serialize()[..],
8997 <Vec<u8>>::from_hex("032c0b7cf95324a07d05398b240174dc0c2be444d96b159aa6c7f7b1e668680991").unwrap()[..]);
8999 assert_eq!(counterparty_pubkeys.funding_pubkey.serialize()[..],
9000 <Vec<u8>>::from_hex("030e9f7b623d2ccc7c9bd44d66d5ce21ce504c0acf6385a132cec6d3c39fa711c1").unwrap()[..]);
9002 assert_eq!(counterparty_pubkeys.htlc_basepoint.to_public_key().serialize()[..],
9003 <Vec<u8>>::from_hex("032c0b7cf95324a07d05398b240174dc0c2be444d96b159aa6c7f7b1e668680991").unwrap()[..]);
9005 // We can't just use build_holder_transaction_keys here as the per_commitment_secret is not
9006 // derived from a commitment_seed, so instead we copy it here and call
9007 // build_commitment_transaction.
9008 let delayed_payment_base = &chan.context.holder_signer.as_ref().pubkeys().delayed_payment_basepoint;
9009 let per_commitment_secret = SecretKey::from_slice(&<Vec<u8>>::from_hex("1f1e1d1c1b1a191817161514131211100f0e0d0c0b0a09080706050403020100").unwrap()[..]).unwrap();
9010 let per_commitment_point = PublicKey::from_secret_key(&secp_ctx, &per_commitment_secret);
9011 let htlc_basepoint = &chan.context.holder_signer.as_ref().pubkeys().htlc_basepoint;
9012 let keys = TxCreationKeys::derive_new(&secp_ctx, &per_commitment_point, delayed_payment_base, htlc_basepoint, &counterparty_pubkeys.revocation_basepoint, &counterparty_pubkeys.htlc_basepoint);
9014 macro_rules! test_commitment {
9015 ( $counterparty_sig_hex: expr, $sig_hex: expr, $tx_hex: expr, $($remain:tt)* ) => {
9016 chan.context.channel_transaction_parameters.channel_type_features = ChannelTypeFeatures::only_static_remote_key();
9017 test_commitment_common!($counterparty_sig_hex, $sig_hex, $tx_hex, &ChannelTypeFeatures::only_static_remote_key(), $($remain)*);
9021 macro_rules! test_commitment_with_anchors {
9022 ( $counterparty_sig_hex: expr, $sig_hex: expr, $tx_hex: expr, $($remain:tt)* ) => {
9023 chan.context.channel_transaction_parameters.channel_type_features = ChannelTypeFeatures::anchors_zero_htlc_fee_and_dependencies();
9024 test_commitment_common!($counterparty_sig_hex, $sig_hex, $tx_hex, &ChannelTypeFeatures::anchors_zero_htlc_fee_and_dependencies(), $($remain)*);
9028 macro_rules! test_commitment_common {
9029 ( $counterparty_sig_hex: expr, $sig_hex: expr, $tx_hex: expr, $opt_anchors: expr, {
9030 $( { $htlc_idx: expr, $counterparty_htlc_sig_hex: expr, $htlc_sig_hex: expr, $htlc_tx_hex: expr } ), *
9032 let (commitment_tx, htlcs): (_, Vec<HTLCOutputInCommitment>) = {
9033 let mut commitment_stats = chan.context.build_commitment_transaction(0xffffffffffff - 42, &keys, true, false, &logger);
9035 let htlcs = commitment_stats.htlcs_included.drain(..)
9036 .filter_map(|(htlc, _)| if htlc.transaction_output_index.is_some() { Some(htlc) } else { None })
9038 (commitment_stats.tx, htlcs)
9040 let trusted_tx = commitment_tx.trust();
9041 let unsigned_tx = trusted_tx.built_transaction();
9042 let redeemscript = chan.context.get_funding_redeemscript();
9043 let counterparty_signature = Signature::from_der(&<Vec<u8>>::from_hex($counterparty_sig_hex).unwrap()[..]).unwrap();
9044 let sighash = unsigned_tx.get_sighash_all(&redeemscript, chan.context.channel_value_satoshis);
9045 log_trace!(logger, "unsigned_tx = {}", serialize(&unsigned_tx.transaction).as_hex());
9046 assert!(secp_ctx.verify_ecdsa(&sighash, &counterparty_signature, chan.context.counterparty_funding_pubkey()).is_ok(), "verify counterparty commitment sig");
9048 let mut per_htlc: Vec<(HTLCOutputInCommitment, Option<Signature>)> = Vec::new();
9049 per_htlc.clear(); // Don't warn about excess mut for no-HTLC calls
9050 let mut counterparty_htlc_sigs = Vec::new();
9051 counterparty_htlc_sigs.clear(); // Don't warn about excess mut for no-HTLC calls
9053 let remote_signature = Signature::from_der(&<Vec<u8>>::from_hex($counterparty_htlc_sig_hex).unwrap()[..]).unwrap();
9054 per_htlc.push((htlcs[$htlc_idx].clone(), Some(remote_signature)));
9055 counterparty_htlc_sigs.push(remote_signature);
9057 assert_eq!(htlcs.len(), per_htlc.len());
9059 let holder_commitment_tx = HolderCommitmentTransaction::new(
9060 commitment_tx.clone(),
9061 counterparty_signature,
9062 counterparty_htlc_sigs,
9063 &chan.context.holder_signer.as_ref().pubkeys().funding_pubkey,
9064 chan.context.counterparty_funding_pubkey()
9066 let holder_sig = signer.sign_holder_commitment(&holder_commitment_tx, &secp_ctx).unwrap();
9067 assert_eq!(Signature::from_der(&<Vec<u8>>::from_hex($sig_hex).unwrap()[..]).unwrap(), holder_sig, "holder_sig");
9069 let funding_redeemscript = chan.context.get_funding_redeemscript();
9070 let tx = holder_commitment_tx.add_holder_sig(&funding_redeemscript, holder_sig);
9071 assert_eq!(serialize(&tx)[..], <Vec<u8>>::from_hex($tx_hex).unwrap()[..], "tx");
9073 // ((htlc, counterparty_sig), (index, holder_sig))
9074 let mut htlc_counterparty_sig_iter = holder_commitment_tx.counterparty_htlc_sigs.iter();
9077 log_trace!(logger, "verifying htlc {}", $htlc_idx);
9078 let remote_signature = Signature::from_der(&<Vec<u8>>::from_hex($counterparty_htlc_sig_hex).unwrap()[..]).unwrap();
9080 let ref htlc = htlcs[$htlc_idx];
9081 let mut htlc_tx = chan_utils::build_htlc_transaction(&unsigned_tx.txid, chan.context.feerate_per_kw,
9082 chan.context.get_counterparty_selected_contest_delay().unwrap(),
9083 &htlc, $opt_anchors, &keys.broadcaster_delayed_payment_key, &keys.revocation_key);
9084 let htlc_redeemscript = chan_utils::get_htlc_redeemscript(&htlc, $opt_anchors, &keys);
9085 let htlc_sighashtype = if $opt_anchors.supports_anchors_zero_fee_htlc_tx() { EcdsaSighashType::SinglePlusAnyoneCanPay } else { EcdsaSighashType::All };
9086 let htlc_sighash = Message::from_slice(&sighash::SighashCache::new(&htlc_tx).segwit_signature_hash(0, &htlc_redeemscript, htlc.amount_msat / 1000, htlc_sighashtype).unwrap()[..]).unwrap();
9087 assert!(secp_ctx.verify_ecdsa(&htlc_sighash, &remote_signature, &keys.countersignatory_htlc_key.to_public_key()).is_ok(), "verify counterparty htlc sig");
9089 let mut preimage: Option<PaymentPreimage> = None;
9092 let out = PaymentHash(Sha256::hash(&[i; 32]).to_byte_array());
9093 if out == htlc.payment_hash {
9094 preimage = Some(PaymentPreimage([i; 32]));
9098 assert!(preimage.is_some());
9101 let htlc_counterparty_sig = htlc_counterparty_sig_iter.next().unwrap();
9102 let htlc_holder_sig = signer.sign_holder_htlc_transaction(&htlc_tx, 0, &HTLCDescriptor {
9103 channel_derivation_parameters: ChannelDerivationParameters {
9104 value_satoshis: chan.context.channel_value_satoshis,
9105 keys_id: chan.context.channel_keys_id,
9106 transaction_parameters: chan.context.channel_transaction_parameters.clone(),
9108 commitment_txid: trusted_tx.txid(),
9109 per_commitment_number: trusted_tx.commitment_number(),
9110 per_commitment_point: trusted_tx.per_commitment_point(),
9111 feerate_per_kw: trusted_tx.feerate_per_kw(),
9113 preimage: preimage.clone(),
9114 counterparty_sig: *htlc_counterparty_sig,
9115 }, &secp_ctx).unwrap();
9116 let num_anchors = if $opt_anchors.supports_anchors_zero_fee_htlc_tx() { 2 } else { 0 };
9117 assert_eq!(htlc.transaction_output_index, Some($htlc_idx + num_anchors), "output index");
9119 let signature = Signature::from_der(&<Vec<u8>>::from_hex($htlc_sig_hex).unwrap()[..]).unwrap();
9120 assert_eq!(signature, htlc_holder_sig, "htlc sig");
9121 let trusted_tx = holder_commitment_tx.trust();
9122 htlc_tx.input[0].witness = trusted_tx.build_htlc_input_witness($htlc_idx, htlc_counterparty_sig, &htlc_holder_sig, &preimage);
9123 log_trace!(logger, "htlc_tx = {}", serialize(&htlc_tx).as_hex());
9124 assert_eq!(serialize(&htlc_tx)[..], <Vec<u8>>::from_hex($htlc_tx_hex).unwrap()[..], "htlc tx");
9126 assert!(htlc_counterparty_sig_iter.next().is_none());
9130 // anchors: simple commitment tx with no HTLCs and single anchor
9131 test_commitment_with_anchors!("30440220655bf909fb6fa81d086f1336ac72c97906dce29d1b166e305c99152d810e26e1022051f577faa46412c46707aaac46b65d50053550a66334e00a44af2706f27a8658",
9132 "3044022007cf6b405e9c9b4f527b0ecad9d8bb661fabb8b12abf7d1c0b3ad1855db3ed490220616d5c1eeadccc63bd775a131149455d62d95a42c2a1b01cc7821fc42dce7778",
9133 "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", {});
9135 // simple commitment tx with no HTLCs
9136 chan.context.value_to_self_msat = 7000000000;
9138 test_commitment!("3045022100c3127b33dcc741dd6b05b1e63cbd1a9a7d816f37af9b6756fa2376b056f032370220408b96279808fe57eb7e463710804cdf4f108388bc5cf722d8c848d2c7f9f3b0",
9139 "30440220616210b2cc4d3afb601013c373bbd8aac54febd9f15400379a8cb65ce7deca60022034236c010991beb7ff770510561ae8dc885b8d38d1947248c38f2ae055647142",
9140 "02000000000101bef67e4e2fb9ddeeb3461973cd4c62abb35050b1add772995b820b584a488489000000000038b02b8002c0c62d0000000000160014cc1b07838e387deacd0e5232e1e8b49f4c29e48454a56a00000000002200204adb4e2f00643db396dd120d4e7dc17625f5f2c11a40d857accc862d6b7dd80e04004730440220616210b2cc4d3afb601013c373bbd8aac54febd9f15400379a8cb65ce7deca60022034236c010991beb7ff770510561ae8dc885b8d38d1947248c38f2ae05564714201483045022100c3127b33dcc741dd6b05b1e63cbd1a9a7d816f37af9b6756fa2376b056f032370220408b96279808fe57eb7e463710804cdf4f108388bc5cf722d8c848d2c7f9f3b001475221023da092f6980e58d2c037173180e9a465476026ee50f96695963e8efe436f54eb21030e9f7b623d2ccc7c9bd44d66d5ce21ce504c0acf6385a132cec6d3c39fa711c152ae3e195220", {});
9142 // anchors: simple commitment tx with no HTLCs
9143 test_commitment_with_anchors!("3045022100f89034eba16b2be0e5581f750a0a6309192b75cce0f202f0ee2b4ec0cc394850022076c65dc507fe42276152b7a3d90e961e678adbe966e916ecfe85e64d430e75f3",
9144 "30450221008266ac6db5ea71aac3c95d97b0e172ff596844851a3216eb88382a8dddfd33d2022050e240974cfd5d708708b4365574517c18e7ae535ef732a3484d43d0d82be9f7",
9145 "02000000000101bef67e4e2fb9ddeeb3461973cd4c62abb35050b1add772995b820b584a488489000000000038b02b80044a010000000000002200202b1b5854183c12d3316565972c4668929d314d81c5dcdbb21cb45fe8a9a8114f4a01000000000000220020e9e86e4823faa62e222ebc858a226636856158f07e69898da3b0d1af0ddb3994c0c62d0000000000220020f3394e1e619b0eca1f91be2fb5ab4dfc59ba5b84ebe014ad1d43a564d012994a508b6a00000000002200204adb4e2f00643db396dd120d4e7dc17625f5f2c11a40d857accc862d6b7dd80e04004830450221008266ac6db5ea71aac3c95d97b0e172ff596844851a3216eb88382a8dddfd33d2022050e240974cfd5d708708b4365574517c18e7ae535ef732a3484d43d0d82be9f701483045022100f89034eba16b2be0e5581f750a0a6309192b75cce0f202f0ee2b4ec0cc394850022076c65dc507fe42276152b7a3d90e961e678adbe966e916ecfe85e64d430e75f301475221023da092f6980e58d2c037173180e9a465476026ee50f96695963e8efe436f54eb21030e9f7b623d2ccc7c9bd44d66d5ce21ce504c0acf6385a132cec6d3c39fa711c152ae3e195220", {});
9147 chan.context.pending_inbound_htlcs.push({
9148 let mut out = InboundHTLCOutput{
9150 amount_msat: 1000000,
9152 payment_hash: PaymentHash([0; 32]),
9153 state: InboundHTLCState::Committed,
9155 out.payment_hash.0 = Sha256::hash(&<Vec<u8>>::from_hex("0000000000000000000000000000000000000000000000000000000000000000").unwrap()).to_byte_array();
9158 chan.context.pending_inbound_htlcs.push({
9159 let mut out = InboundHTLCOutput{
9161 amount_msat: 2000000,
9163 payment_hash: PaymentHash([0; 32]),
9164 state: InboundHTLCState::Committed,
9166 out.payment_hash.0 = Sha256::hash(&<Vec<u8>>::from_hex("0101010101010101010101010101010101010101010101010101010101010101").unwrap()).to_byte_array();
9169 chan.context.pending_outbound_htlcs.push({
9170 let mut out = OutboundHTLCOutput{
9172 amount_msat: 2000000,
9174 payment_hash: PaymentHash([0; 32]),
9175 state: OutboundHTLCState::Committed,
9176 source: HTLCSource::dummy(),
9177 skimmed_fee_msat: None,
9178 blinding_point: None,
9180 out.payment_hash.0 = Sha256::hash(&<Vec<u8>>::from_hex("0202020202020202020202020202020202020202020202020202020202020202").unwrap()).to_byte_array();
9183 chan.context.pending_outbound_htlcs.push({
9184 let mut out = OutboundHTLCOutput{
9186 amount_msat: 3000000,
9188 payment_hash: PaymentHash([0; 32]),
9189 state: OutboundHTLCState::Committed,
9190 source: HTLCSource::dummy(),
9191 skimmed_fee_msat: None,
9192 blinding_point: None,
9194 out.payment_hash.0 = Sha256::hash(&<Vec<u8>>::from_hex("0303030303030303030303030303030303030303030303030303030303030303").unwrap()).to_byte_array();
9197 chan.context.pending_inbound_htlcs.push({
9198 let mut out = InboundHTLCOutput{
9200 amount_msat: 4000000,
9202 payment_hash: PaymentHash([0; 32]),
9203 state: InboundHTLCState::Committed,
9205 out.payment_hash.0 = Sha256::hash(&<Vec<u8>>::from_hex("0404040404040404040404040404040404040404040404040404040404040404").unwrap()).to_byte_array();
9209 // commitment tx with all five HTLCs untrimmed (minimum feerate)
9210 chan.context.value_to_self_msat = 6993000000; // 7000000000 - 7000000
9211 chan.context.feerate_per_kw = 0;
9213 test_commitment!("3044022009b048187705a8cbc9ad73adbe5af148c3d012e1f067961486c822c7af08158c022006d66f3704cfab3eb2dc49dae24e4aa22a6910fc9b424007583204e3621af2e5",
9214 "304402206fc2d1f10ea59951eefac0b4b7c396a3c3d87b71ff0b019796ef4535beaf36f902201765b0181e514d04f4c8ad75659d7037be26cdb3f8bb6f78fe61decef484c3ea",
9215 "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", {
9218 "3045022100d9e29616b8f3959f1d3d7f7ce893ffedcdc407717d0de8e37d808c91d3a7c50d022078c3033f6d00095c8720a4bc943c1b45727818c082e4e3ddbc6d3116435b624b",
9219 "30440220636de5682ef0c5b61f124ec74e8aa2461a69777521d6998295dcea36bc3338110220165285594b23c50b28b82df200234566628a27bcd17f7f14404bd865354eb3ce",
9220 "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" },
9223 "30440220649fe8b20e67e46cbb0d09b4acea87dbec001b39b08dee7bdd0b1f03922a8640022037c462dff79df501cecfdb12ea7f4de91f99230bb544726f6e04527b1f896004",
9224 "3045022100803159dee7935dba4a1d36a61055ce8fd62caa528573cc221ae288515405a252022029c59e7cffce374fe860100a4a63787e105c3cf5156d40b12dd53ff55ac8cf3f",
9225 "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" },
9228 "30440220770fc321e97a19f38985f2e7732dd9fe08d16a2efa4bcbc0429400a447faf49102204d40b417f3113e1b0944ae0986f517564ab4acd3d190503faf97a6e420d43352",
9229 "3045022100a437cc2ce77400ecde441b3398fea3c3ad8bdad8132be818227fe3c5b8345989022069d45e7fa0ae551ec37240845e2c561ceb2567eacf3076a6a43a502d05865faa",
9230 "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" },
9233 "304402207bcbf4f60a9829b05d2dbab84ed593e0291836be715dc7db6b72a64caf646af802201e489a5a84f7c5cc130398b841d138d031a5137ac8f4c49c770a4959dc3c1363",
9234 "304402203121d9b9c055f354304b016a36662ee99e1110d9501cb271b087ddb6f382c2c80220549882f3f3b78d9c492de47543cb9a697cecc493174726146536c5954dac7487",
9235 "02000000000101ab84ff284f162cfbfef241f853b47d4368d171f9e2a1445160cd591c4c7d882b03000000000000000001b80b0000000000002200204adb4e2f00643db396dd120d4e7dc17625f5f2c11a40d857accc862d6b7dd80e050047304402207bcbf4f60a9829b05d2dbab84ed593e0291836be715dc7db6b72a64caf646af802201e489a5a84f7c5cc130398b841d138d031a5137ac8f4c49c770a4959dc3c13630147304402203121d9b9c055f354304b016a36662ee99e1110d9501cb271b087ddb6f382c2c80220549882f3f3b78d9c492de47543cb9a697cecc493174726146536c5954dac748701008576a91414011f7254d96b819c76986c277d115efce6f7b58763ac67210394854aa6eab5b2a8122cc726e9dded053a2184d88256816826d6231c068d4a5b7c820120876475527c21030d417a46946384f88d5f3337267c5e579765875dc4daca813e21734b140639e752ae67a9148a486ff2e31d6158bf39e2608864d63fefd09d5b88ac6868f7010000" },
9238 "3044022076dca5cb81ba7e466e349b7128cdba216d4d01659e29b96025b9524aaf0d1899022060de85697b88b21c749702b7d2cfa7dfeaa1f472c8f1d7d9c23f2bf968464b87",
9239 "3045022100d9080f103cc92bac15ec42464a95f070c7fb6925014e673ee2ea1374d36a7f7502200c65294d22eb20d48564954d5afe04a385551919d8b2ddb4ae2459daaeee1d95",
9240 "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" }
9243 // commitment tx with seven outputs untrimmed (maximum feerate)
9244 chan.context.value_to_self_msat = 6993000000; // 7000000000 - 7000000
9245 chan.context.feerate_per_kw = 647;
9247 test_commitment!("3045022100a135f9e8a5ed25f7277446c67956b00ce6f610ead2bdec2c2f686155b7814772022059f1f6e1a8b336a68efcc1af3fe4d422d4827332b5b067501b099c47b7b5b5ee",
9248 "30450221009ec15c687898bb4da8b3a833e5ab8bfc51ec6e9202aaa8e66611edfd4a85ed1102203d7183e45078b9735c93450bc3415d3e5a8c576141a711ec6ddcb4a893926bb7",
9249 "02000000000101bef67e4e2fb9ddeeb3461973cd4c62abb35050b1add772995b820b584a488489000000000038b02b8007e80300000000000022002052bfef0479d7b293c27e0f1eb294bea154c63a3294ef092c19af51409bce0e2ad007000000000000220020403d394747cae42e98ff01734ad5c08f82ba123d3d9a620abda88989651e2ab5d007000000000000220020748eba944fedc8827f6b06bc44678f93c0f9e6078b35c6331ed31e75f8ce0c2db80b000000000000220020c20b5d1f8584fd90443e7b7b720136174fa4b9333c261d04dbbd012635c0f419a00f0000000000002200208c48d15160397c9731df9bc3b236656efb6665fbfe92b4a6878e88a499f741c4c0c62d0000000000160014cc1b07838e387deacd0e5232e1e8b49f4c29e484e09c6a00000000002200204adb4e2f00643db396dd120d4e7dc17625f5f2c11a40d857accc862d6b7dd80e04004830450221009ec15c687898bb4da8b3a833e5ab8bfc51ec6e9202aaa8e66611edfd4a85ed1102203d7183e45078b9735c93450bc3415d3e5a8c576141a711ec6ddcb4a893926bb701483045022100a135f9e8a5ed25f7277446c67956b00ce6f610ead2bdec2c2f686155b7814772022059f1f6e1a8b336a68efcc1af3fe4d422d4827332b5b067501b099c47b7b5b5ee01475221023da092f6980e58d2c037173180e9a465476026ee50f96695963e8efe436f54eb21030e9f7b623d2ccc7c9bd44d66d5ce21ce504c0acf6385a132cec6d3c39fa711c152ae3e195220", {
9252 "30450221008437627f9ad84ac67052e2a414a4367b8556fd1f94d8b02590f89f50525cd33502205b9c21ff6e7fc864f2352746ad8ba59182510819acb644e25b8a12fc37bbf24f",
9253 "30440220344b0deb055230d01703e6c7acd45853c4af2328b49b5d8af4f88a060733406602202ea64f2a43d5751edfe75503cbc35a62e3141b5ed032fa03360faf4ca66f670b",
9254 "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" },
9257 "304402205a67f92bf6845cf2892b48d874ac1daf88a36495cf8a06f93d83180d930a6f75022031da1621d95c3f335cc06a3056cf960199dae600b7cf89088f65fc53cdbef28c",
9258 "30450221009e5e3822b0185c6799a95288c597b671d6cc69ab80f43740f00c6c3d0752bdda02206da947a74bd98f3175324dc56fdba86cc783703a120a6f0297537e60632f4c7f",
9259 "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" },
9262 "30440220437e21766054a3eef7f65690c5bcfa9920babbc5af92b819f772f6ea96df6c7402207173622024bd97328cfb26c6665e25c2f5d67c319443ccdc60c903217005d8c8",
9263 "3045022100fcfc47e36b712624677626cef3dc1d67f6583bd46926a6398fe6b00b0c9a37760220525788257b187fc775c6370d04eadf34d06f3650a63f8df851cee0ecb47a1673",
9264 "020000000001012cfb3e4788c206881d38f2996b6cb2109b5935acb527d14bdaa7b908afa9b2fe020000000000000000010a060000000000002200204adb4e2f00643db396dd120d4e7dc17625f5f2c11a40d857accc862d6b7dd80e05004730440220437e21766054a3eef7f65690c5bcfa9920babbc5af92b819f772f6ea96df6c7402207173622024bd97328cfb26c6665e25c2f5d67c319443ccdc60c903217005d8c801483045022100fcfc47e36b712624677626cef3dc1d67f6583bd46926a6398fe6b00b0c9a37760220525788257b187fc775c6370d04eadf34d06f3650a63f8df851cee0ecb47a1673012001010101010101010101010101010101010101010101010101010101010101018a76a91414011f7254d96b819c76986c277d115efce6f7b58763ac67210394854aa6eab5b2a8122cc726e9dded053a2184d88256816826d6231c068d4a5b7c8201208763a9144b6b2e5444c2639cc0fb7bcea5afba3f3cdce23988527c21030d417a46946384f88d5f3337267c5e579765875dc4daca813e21734b140639e752ae677502f501b175ac686800000000" },
9267 "304402207436e10737e4df499fc051686d3e11a5bb2310e4d1f1e691d287cef66514791202207cb58e71a6b7a42dd001b7e3ae672ea4f71ea3e1cd412b742e9124abb0739c64",
9268 "3045022100e78211b8409afb7255ffe37337da87f38646f1faebbdd61bc1920d69e3ead67a02201a626305adfcd16bfb7e9340928d9b6305464eab4aa4c4a3af6646e9b9f69dee",
9269 "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" },
9272 "30450221009acd6a827a76bfee50806178dfe0495cd4e1d9c58279c194c7b01520fe68cb8d022024d439047c368883e570997a7d40f0b430cb5a742f507965e7d3063ae3feccca",
9273 "3044022048762cf546bbfe474f1536365ea7c416e3c0389d60558bc9412cb148fb6ab68202207215d7083b75c96ff9d2b08c59c34e287b66820f530b486a9aa4cdd9c347d5b9",
9274 "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" }
9277 // commitment tx with six outputs untrimmed (minimum feerate)
9278 chan.context.value_to_self_msat = 6993000000; // 7000000000 - 7000000
9279 chan.context.feerate_per_kw = 648;
9281 test_commitment!("304402203948f900a5506b8de36a4d8502f94f21dd84fd9c2314ab427d52feaa7a0a19f2022059b6a37a4adaa2c5419dc8aea63c6e2a2ec4c4bde46207f6dc1fcd22152fc6e5",
9282 "3045022100b15f72908ba3382a34ca5b32519240a22300cc6015b6f9418635fb41f3d01d8802207adb331b9ed1575383dca0f2355e86c173802feecf8298fbea53b9d4610583e9",
9283 "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", {
9286 "3045022100a031202f3be94678f0e998622ee95ebb6ada8da1e9a5110228b5e04a747351e4022010ca6a21e18314ed53cfaae3b1f51998552a61a468e596368829a50ce40110e0",
9287 "304502210097e1873b57267730154595187a34949d3744f52933070c74757005e61ce2112e02204ecfba2aa42d4f14bdf8bad4206bb97217b702e6c433e0e1b0ce6587e6d46ec6",
9288 "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" },
9291 "304402202361012a634aee7835c5ecdd6413dcffa8f404b7e77364c792cff984e4ee71e90220715c5e90baa08daa45a7439b1ee4fa4843ed77b19c058240b69406606d384124",
9292 "3044022019de73b00f1d818fb388e83b2c8c31f6bce35ac624e215bc12f88f9dc33edf48022006ff814bb9f700ee6abc3294e146fac3efd4f13f0005236b41c0a946ee00c9ae",
9293 "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" },
9296 "304402207e8e82cd71ed4febeb593732c260456836e97d81896153ecd2b3cf320ca6861702202dd4a30f68f98ced7cc56a36369ac1fdd978248c5ff4ed204fc00cc625532989",
9297 "3045022100bd0be6100c4fd8f102ec220e1b053e4c4e2ecca25615490150007b40d314dc3902201a1e0ea266965b43164d9e6576f58fa6726d42883dd1c3996d2925c2e2260796",
9298 "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" },
9301 "3044022024cd52e4198c8ae0e414a86d86b5a65ea7450f2eb4e783096736d93395eca5ce022078f0094745b45be4d4b2b04dd5978c9e66ba49109e5704403e84aaf5f387d6be",
9302 "3045022100bbfb9d0a946d420807c86e985d636cceb16e71c3694ed186316251a00cbd807202207773223f9a337e145f64673825be9b30d07ef1542c82188b264bedcf7cda78c6",
9303 "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" }
9306 // anchors: commitment tx with six outputs untrimmed (minimum dust limit)
9307 chan.context.value_to_self_msat = 6993000000; // 7000000000 - 7000000
9308 chan.context.feerate_per_kw = 645;
9309 chan.context.holder_dust_limit_satoshis = 1001;
9311 test_commitment_with_anchors!("3044022025d97466c8049e955a5afce28e322f4b34d2561118e52332fb400f9b908cc0a402205dc6fba3a0d67ee142c428c535580cd1f2ff42e2f89b47e0c8a01847caffc312",
9312 "3045022100d57697c707b6f6d053febf24b98e8989f186eea42e37e9e91663ec2c70bb8f70022079b0715a472118f262f43016a674f59c015d9cafccec885968e76d9d9c5d0051",
9313 "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", {
9316 "3045022100e04d160a326432659fe9fb127304c1d348dfeaba840081bdc57d8efd902a48d8022008a824e7cf5492b97e4d9e03c06a09f822775a44f6b5b2533a2088904abfc282",
9317 "3045022100b7c49846466b13b190ff739bbe3005c105482fc55539e55b1c561f76b6982b6c02200e5c35808619cf543c8405cff9fedd25f333a4a2f6f6d5e8af8150090c40ef09",
9318 "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" },
9321 "3045022100fbdc3c367ce3bf30796025cc590ee1f2ce0e72ae1ac19f5986d6d0a4fc76211f02207e45ae9267e8e820d188569604f71d1abd11bd385d58853dd7dc034cdb3e9a6e",
9322 "3045022100d29330f24db213b262068706099b39c15fa7e070c3fcdf8836c09723fc4d365602203ce57d01e9f28601e461a0b5c4a50119b270bde8b70148d133a6849c70b115ac",
9323 "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" },
9326 "3044022066c5ef625cee3ddd2bc7b6bfb354b5834cf1cc6d52dd972fb41b7b225437ae4a022066cb85647df65c6b87a54e416dcdcca778a776c36a9643d2b5dc793c9b29f4c1",
9327 "304402202d4ce515cd9000ec37575972d70b8d24f73909fb7012e8ebd8c2066ef6fe187902202830b53e64ea565fecd0f398100691da6bb2a5cf9bb0d1926f1d71d05828a11e",
9328 "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" },
9331 "3044022022c7e11595c53ee89a57ca76baf0aed730da035952d6ab3fe6459f5eff3b337a022075e10cc5f5fd724a35ce4087a5d03cd616698626c69814032132b50bb97dc615",
9332 "3045022100b20cd63e0587d1711beaebda4730775c4ac8b8b2ec78fe18a0c44c3f168c25230220079abb7fc4924e2fca5950842e5b9e416735585026914570078c4ef62f286226",
9333 "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" }
9336 // commitment tx with six outputs untrimmed (maximum feerate)
9337 chan.context.value_to_self_msat = 6993000000; // 7000000000 - 7000000
9338 chan.context.feerate_per_kw = 2069;
9339 chan.context.holder_dust_limit_satoshis = 546;
9341 test_commitment!("304502210090b96a2498ce0c0f2fadbec2aab278fed54c1a7838df793ec4d2c78d96ec096202204fdd439c50f90d483baa7b68feeef4bd33bc277695405447bcd0bfb2ca34d7bc",
9342 "3045022100ad9a9bbbb75d506ca3b716b336ee3cf975dd7834fcf129d7dd188146eb58a8b4022061a759ee417339f7fe2ea1e8deb83abb6a74db31a09b7648a932a639cda23e33",
9343 "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", {
9346 "3045022100f33513ee38abf1c582876f921f8fddc06acff48e04515532a32d3938de938ffd02203aa308a2c1863b7d6fdf53159a1465bf2e115c13152546cc5d74483ceaa7f699",
9347 "3045022100a637902a5d4c9ba9e7c472a225337d5aac9e2e3f6744f76e237132e7619ba0400220035c60d784a031c0d9f6df66b7eab8726a5c25397399ee4aa960842059eb3f9d",
9348 "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" },
9351 "3045022100ce07682cf4b90093c22dc2d9ab2a77ad6803526b655ef857221cc96af5c9e0bf02200f501cee22e7a268af40b555d15a8237c9f36ad67ef1841daf9f6a0267b1e6df",
9352 "3045022100e57e46234f8782d3ff7aa593b4f7446fb5316c842e693dc63ee324fd49f6a1c302204a2f7b44c48bd26e1554422afae13153eb94b29d3687b733d18930615fb2db61",
9353 "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" },
9356 "3045022100e3e35492e55f82ec0bc2f317ffd7a486d1f7024330fe9743c3559fc39f32ef0c02203d1d4db651fc388a91d5ad8ecdd8e83673063bc8eefe27cfd8c189090e3a23e0",
9357 "3044022068613fb1b98eb3aec7f44c5b115b12343c2f066c4277c82b5f873dfe68f37f50022028109b4650f3f528ca4bfe9a467aff2e3e43893b61b5159157119d5d95cf1c18",
9358 "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" },
9361 "304402207475aeb0212ef9bf5130b60937817ad88c9a87976988ef1f323f026148cc4a850220739fea17ad3257dcad72e509c73eebe86bee30b178467b9fdab213d631b109df",
9362 "3045022100d315522e09e7d53d2a659a79cb67fef56d6c4bddf3f46df6772d0d20a7beb7c8022070bcc17e288607b6a72be0bd83368bb6d53488db266c1cdb4d72214e4f02ac33",
9363 "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" }
9366 // commitment tx with five outputs untrimmed (minimum feerate)
9367 chan.context.value_to_self_msat = 6993000000; // 7000000000 - 7000000
9368 chan.context.feerate_per_kw = 2070;
9370 test_commitment!("304402204ca1ba260dee913d318271d86e10ca0f5883026fb5653155cff600fb40895223022037b145204b7054a40e08bb1fefbd826f827b40838d3e501423bcc57924bcb50c",
9371 "3044022001014419b5ba00e083ac4e0a85f19afc848aacac2d483b4b525d15e2ae5adbfe022015ebddad6ee1e72b47cb09f3e78459da5be01ccccd95dceca0e056a00cc773c1",
9372 "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", {
9375 "304402205f6b6d12d8d2529fb24f4445630566cf4abbd0f9330ab6c2bdb94222d6a2a0c502202f556258ae6f05b193749e4c541dfcc13b525a5422f6291f073f15617ba8579b",
9376 "30440220150b11069454da70caf2492ded9e0065c9a57f25ac2a4c52657b1d15b6c6ed85022068a38833b603c8892717206383611bad210f1cbb4b1f87ea29c6c65b9e1cb3e5",
9377 "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" },
9380 "3045022100f960dfb1c9aee7ce1437efa65b523e399383e8149790e05d8fed27ff6e42fe0002202fe8613e062ffe0b0c518cc4101fba1c6de70f64a5bcc7ae663f2efae43b8546",
9381 "30450221009a6ed18e6873bc3644332a6ee21c152a5b102821865350df7a8c74451a51f9f2022050d801fb4895d7d7fbf452824c0168347f5c0cbe821cf6a97a63af5b8b2563c6",
9382 "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" },
9385 "3045022100ae5fc7717ae684bc1fcf9020854e5dbe9842c9e7472879ac06ff95ac2bb10e4e022057728ada4c00083a3e65493fb5d50a232165948a1a0f530ef63185c2c8c56504",
9386 "30440220408ad3009827a8fccf774cb285587686bfb2ed041f89a89453c311ce9c8ee0f902203c7392d9f8306d3a46522a66bd2723a7eb2628cb2d9b34d4c104f1766bf37502",
9387 "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" }
9390 // commitment tx with five outputs untrimmed (maximum feerate)
9391 chan.context.value_to_self_msat = 6993000000; // 7000000000 - 7000000
9392 chan.context.feerate_per_kw = 2194;
9394 test_commitment!("304402204bb3d6e279d71d9da414c82de42f1f954267c762b2e2eb8b76bc3be4ea07d4b0022014febc009c5edc8c3fc5d94015de163200f780046f1c293bfed8568f08b70fb3",
9395 "3044022072c2e2b1c899b2242656a537dde2892fa3801be0d6df0a87836c550137acde8302201654aa1974d37a829083c3ba15088689f30b56d6a4f6cb14c7bad0ee3116d398",
9396 "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", {
9399 "3045022100939726680351a7856c1bc386d4a1f422c7d29bd7b56afc139570f508474e6c40022023175a799ccf44c017fbaadb924c40b2a12115a5b7d0dfd3228df803a2de8450",
9400 "304502210099c98c2edeeee6ec0fb5f3bea8b79bb016a2717afa9b5072370f34382de281d302206f5e2980a995e045cf90a547f0752a7ee99d48547bc135258fe7bc07e0154301",
9401 "02000000000101153cd825fdb3aa624bfe513e8031d5d08c5e582fb3d1d1fe8faf27d3eed410cd0000000000000000000122020000000000002200204adb4e2f00643db396dd120d4e7dc17625f5f2c11a40d857accc862d6b7dd80e0500483045022100939726680351a7856c1bc386d4a1f422c7d29bd7b56afc139570f508474e6c40022023175a799ccf44c017fbaadb924c40b2a12115a5b7d0dfd3228df803a2de84500148304502210099c98c2edeeee6ec0fb5f3bea8b79bb016a2717afa9b5072370f34382de281d302206f5e2980a995e045cf90a547f0752a7ee99d48547bc135258fe7bc07e015430101008576a91414011f7254d96b819c76986c277d115efce6f7b58763ac67210394854aa6eab5b2a8122cc726e9dded053a2184d88256816826d6231c068d4a5b7c820120876475527c21030d417a46946384f88d5f3337267c5e579765875dc4daca813e21734b140639e752ae67a914b43e1b38138a41b37f7cd9a1d274bc63e3a9b5d188ac6868f6010000" },
9404 "3044022021bb883bf324553d085ba2e821cad80c28ef8b303dbead8f98e548783c02d1600220638f9ef2a9bba25869afc923f4b5dc38be3bb459f9efa5d869392d5f7779a4a0",
9405 "3045022100fd85bd7697b89c08ec12acc8ba89b23090637d83abd26ca37e01ae93e67c367302202b551fe69386116c47f984aab9c8dfd25d864dcde5d3389cfbef2447a85c4b77",
9406 "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" },
9409 "3045022100c9e6f0454aa598b905a35e641a70cc9f67b5f38cc4b00843a041238c4a9f1c4a0220260a2822a62da97e44583e837245995ca2e36781769c52f19e498efbdcca262b",
9410 "30450221008a9f2ea24cd455c2b64c1472a5fa83865b0a5f49a62b661801e884cf2849af8302204d44180e50bf6adfcf1c1e581d75af91aba4e28681ce4a5ee5f3cbf65eca10f3",
9411 "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" }
9414 // commitment tx with four outputs untrimmed (minimum feerate)
9415 chan.context.value_to_self_msat = 6993000000; // 7000000000 - 7000000
9416 chan.context.feerate_per_kw = 2195;
9418 test_commitment!("304402201a8c1b1f9671cd9e46c7323a104d7047cc48d3ee80d40d4512e0c72b8dc65666022066d7f9a2ce18c9eb22d2739ffcce05721c767f9b607622a31b6ea5793ddce403",
9419 "3044022044d592025b610c0d678f65032e87035cdfe89d1598c522cc32524ae8172417c30220749fef9d5b2ae8cdd91ece442ba8809bc891efedae2291e578475f97715d1767",
9420 "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", {
9423 "3045022100e57b845066a06ee7c2cbfc29eabffe52daa9bf6f6de760066d04df9f9b250e0002202ffb197f0e6e0a77a75a9aff27014bd3de83b7f748d7efef986abe655e1dd50e",
9424 "3045022100ecc8c6529d0b2316d046f0f0757c1e1c25a636db168ec4f3aa1b9278df685dc0022067ae6b65e936f1337091f7b18a15935b608c5f2cdddb2f892ed0babfdd376d76",
9425 "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" },
9428 "3045022100d193b7ecccad8057571620a0b1ffa6c48e9483311723b59cf536043b20bc51550220546d4bd37b3b101ecda14f6c907af46ec391abce1cd9c7ce22b1a62b534f2f2a",
9429 "3044022014d66f11f9cacf923807eba49542076c5fe5cccf252fb08fe98c78ef3ca6ab5402201b290dbe043cc512d9d78de074a5a129b8759bc6a6c546b190d120b690bd6e82",
9430 "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" }
9433 // anchors: commitment tx with four outputs untrimmed (minimum dust limit)
9434 chan.context.value_to_self_msat = 6993000000; // 7000000000 - 7000000
9435 chan.context.feerate_per_kw = 2185;
9436 chan.context.holder_dust_limit_satoshis = 2001;
9437 let cached_channel_type = chan.context.channel_type;
9438 chan.context.channel_type = ChannelTypeFeatures::anchors_zero_htlc_fee_and_dependencies();
9440 test_commitment_with_anchors!("3044022040f63a16148cf35c8d3d41827f5ae7f7c3746885bb64d4d1b895892a83812b3e02202fcf95c2bf02c466163b3fa3ced6a24926fbb4035095a96842ef516e86ba54c0",
9441 "3045022100cd8479cfe1edb1e5a1d487391e0451a469c7171e51e680183f19eb4321f20e9b02204eab7d5a6384b1b08e03baa6e4d9748dfd2b5ab2bae7e39604a0d0055bbffdd5",
9442 "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", {
9445 "304402206870514a72ad6e723ff7f1e0370d7a33c1cd2a0b9272674143ebaf6a1d02dee102205bd953c34faf5e7322e9a1c0103581cb090280fda4f1039ee8552668afa90ebb",
9446 "30440220669de9ca7910eff65a7773ebd14a9fc371fe88cde5b8e2a81609d85c87ac939b02201ac29472fa4067322e92d75b624942d60be5050139b20bb363db75be79eb946f",
9447 "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" },
9450 "3045022100949e8dd938da56445b1cdfdebe1b7efea086edd05d89910d205a1e2e033ce47102202cbd68b5262ab144d9ec12653f87dfb0bb6bd05d1f58ae1e523f028eaefd7271",
9451 "3045022100e3104ed8b239f8019e5f0a1a73d7782a94a8c36e7984f476c3a0b3cb0e62e27902207e3d52884600985f8a2098e53a5c30dd6a5e857733acfaa07ab2162421ed2688",
9452 "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" }
9455 // commitment tx with four outputs untrimmed (maximum feerate)
9456 chan.context.value_to_self_msat = 6993000000; // 7000000000 - 7000000
9457 chan.context.feerate_per_kw = 3702;
9458 chan.context.holder_dust_limit_satoshis = 546;
9459 chan.context.channel_type = cached_channel_type.clone();
9461 test_commitment!("304502210092a587aeb777f869e7ff0d7898ea619ee26a3dacd1f3672b945eea600be431100220077ee9eae3528d15251f2a52b607b189820e57a6ccfac8d1af502b132ee40169",
9462 "3045022100e5efb73c32d32da2d79702299b6317de6fb24a60476e3855926d78484dd1b3c802203557cb66a42c944ef06e00bcc4da35a5bcb2f185aab0f8e403e519e1d66aaf75",
9463 "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", {
9466 "304402206fa54c11f98c3bae1e93df43fc7affeb05b476bf8060c03e29c377c69bc08e8b0220672701cce50d5c379ff45a5d2cfe48ac44973adb066ac32608e21221d869bb89",
9467 "304402206e36c683ebf2cb16bcef3d5439cf8b53cd97280a365ed8acd7abb85a8ba5f21c02206e8621edfc2a5766cbc96eb67fd501127ff163eb6b85518a39f7d4974aef126f",
9468 "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" },
9471 "3044022057649739b0eb74d541ead0dfdb3d4b2c15aa192720031044c3434c67812e5ca902201e5ede42d960ae551707f4a6b34b09393cf4dee2418507daa022e3550dbb5817",
9472 "304402207faad26678c8850e01b4a0696d60841f7305e1832b786110ee9075cb92ed14a30220516ef8ee5dfa80824ea28cbcec0dd95f8b847146257c16960db98507db15ffdc",
9473 "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" }
9476 // commitment tx with three outputs untrimmed (minimum feerate)
9477 chan.context.value_to_self_msat = 6993000000; // 7000000000 - 7000000
9478 chan.context.feerate_per_kw = 3703;
9480 test_commitment!("3045022100b495d239772a237ff2cf354b1b11be152fd852704cb184e7356d13f2fb1e5e430220723db5cdb9cbd6ead7bfd3deb419cf41053a932418cbb22a67b581f40bc1f13e",
9481 "304402201b736d1773a124c745586217a75bed5f66c05716fbe8c7db4fdb3c3069741cdd02205083f39c321c1bcadfc8d97e3c791a66273d936abac0c6a2fde2ed46019508e1",
9482 "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", {
9485 "3045022100c34c61735f93f2e324cc873c3b248111ccf8f6db15d5969583757010d4ad2b4602207867bb919b2ddd6387873e425345c9b7fd18d1d66aba41f3607bc2896ef3c30a",
9486 "3045022100988c143e2110067117d2321bdd4bd16ca1734c98b29290d129384af0962b634e02206c1b02478878c5f547018b833986578f90c3e9be669fe5788ad0072a55acbb05",
9487 "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" }
9490 // anchors: commitment tx with three outputs untrimmed (minimum dust limit)
9491 chan.context.value_to_self_msat = 6993000000; // 7000000000 - 7000000
9492 chan.context.feerate_per_kw = 3687;
9493 chan.context.holder_dust_limit_satoshis = 3001;
9494 chan.context.channel_type = ChannelTypeFeatures::anchors_zero_htlc_fee_and_dependencies();
9496 test_commitment_with_anchors!("3045022100ad6c71569856b2d7ff42e838b4abe74a713426b37f22fa667a195a4c88908c6902202b37272b02a42dc6d9f4f82cab3eaf84ac882d9ed762859e1e75455c2c228377",
9497 "3045022100c970799bcb33f43179eb43b3378a0a61991cf2923f69b36ef12548c3df0e6d500220413dc27d2e39ee583093adfcb7799be680141738babb31cc7b0669a777a31f5d",
9498 "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", {
9501 "3044022017b558a3cf5f0cb94269e2e927b29ed22bd2416abb8a7ce6de4d1256f359b93602202e9ca2b1a23ea3e69f433c704e327739e219804b8c188b1d52f74fd5a9de954c",
9502 "3045022100af7a8b7c7ff2080c68995254cb66d64d9954edcc5baac3bb4f27ed2d29aaa6120220421c27da7a60574a9263f271e0f3bd34594ec6011095190022b3b54596ea03de",
9503 "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" }
9506 // commitment tx with three outputs untrimmed (maximum feerate)
9507 chan.context.value_to_self_msat = 6993000000; // 7000000000 - 7000000
9508 chan.context.feerate_per_kw = 4914;
9509 chan.context.holder_dust_limit_satoshis = 546;
9510 chan.context.channel_type = cached_channel_type.clone();
9512 test_commitment!("3045022100b4b16d5f8cc9fc4c1aff48831e832a0d8990e133978a66e302c133550954a44d022073573ce127e2200d316f6b612803a5c0c97b8d20e1e44dbe2ac0dd2fb8c95244",
9513 "3045022100d72638bc6308b88bb6d45861aae83e5b9ff6e10986546e13bce769c70036e2620220320be7c6d66d22f30b9fcd52af66531505b1310ca3b848c19285b38d8a1a8c19",
9514 "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", {
9517 "3045022100f43591c156038ba217756006bb3c55f7d113a325cdd7d9303c82115372858d68022016355b5aadf222bc8d12e426c75f4a03423917b2443a103eb2a498a3a2234374",
9518 "30440220585dee80fafa264beac535c3c0bb5838ac348b156fdc982f86adc08dfc9bfd250220130abb82f9f295cc9ef423dcfef772fde2acd85d9df48cc538981d26a10a9c10",
9519 "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" }
9522 // commitment tx with two outputs untrimmed (minimum feerate)
9523 chan.context.value_to_self_msat = 6993000000; // 7000000000 - 7000000
9524 chan.context.feerate_per_kw = 4915;
9525 chan.context.holder_dust_limit_satoshis = 546;
9527 test_commitment!("304402203a286936e74870ca1459c700c71202af0381910a6bfab687ef494ef1bc3e02c902202506c362d0e3bee15e802aa729bf378e051644648253513f1c085b264cc2a720",
9528 "30450221008a953551f4d67cb4df3037207fc082ddaf6be84d417b0bd14c80aab66f1b01a402207508796dc75034b2dee876fe01dc05a08b019f3e5d689ac8842ade2f1befccf5",
9529 "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", {});
9531 // anchors: commitment tx with two outputs untrimmed (minimum dust limit)
9532 chan.context.value_to_self_msat = 6993000000; // 7000000000 - 7000000
9533 chan.context.feerate_per_kw = 4894;
9534 chan.context.holder_dust_limit_satoshis = 4001;
9535 chan.context.channel_type = ChannelTypeFeatures::anchors_zero_htlc_fee_and_dependencies();
9537 test_commitment_with_anchors!("3045022100e784a66b1588575801e237d35e510fd92a81ae3a4a2a1b90c031ad803d07b3f3022021bc5f16501f167607d63b681442da193eb0a76b4b7fd25c2ed4f8b28fd35b95",
9538 "30450221009f16ac85d232e4eddb3fcd750a68ebf0b58e3356eaada45d3513ede7e817bf4c02207c2b043b4e5f971261975406cb955219fa56bffe5d834a833694b5abc1ce4cfd",
9539 "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", {});
9541 // commitment tx with two outputs untrimmed (maximum feerate)
9542 chan.context.value_to_self_msat = 6993000000; // 7000000000 - 7000000
9543 chan.context.feerate_per_kw = 9651180;
9544 chan.context.holder_dust_limit_satoshis = 546;
9545 chan.context.channel_type = cached_channel_type.clone();
9547 test_commitment!("304402200a8544eba1d216f5c5e530597665fa9bec56943c0f66d98fc3d028df52d84f7002201e45fa5c6bc3a506cc2553e7d1c0043a9811313fc39c954692c0d47cfce2bbd3",
9548 "3045022100e11b638c05c650c2f63a421d36ef8756c5ce82f2184278643520311cdf50aa200220259565fb9c8e4a87ccaf17f27a3b9ca4f20625754a0920d9c6c239d8156a11de",
9549 "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", {});
9551 // commitment tx with one output untrimmed (minimum feerate)
9552 chan.context.value_to_self_msat = 6993000000; // 7000000000 - 7000000
9553 chan.context.feerate_per_kw = 9651181;
9555 test_commitment!("304402202ade0142008309eb376736575ad58d03e5b115499709c6db0b46e36ff394b492022037b63d78d66404d6504d4c4ac13be346f3d1802928a6d3ad95a6a944227161a2",
9556 "304402207e8d51e0c570a5868a78414f4e0cbfaed1106b171b9581542c30718ee4eb95ba02203af84194c97adf98898c9afe2f2ed4a7f8dba05a2dfab28ac9d9c604aa49a379",
9557 "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", {});
9559 // anchors: commitment tx with one output untrimmed (minimum dust limit)
9560 chan.context.value_to_self_msat = 6993000000; // 7000000000 - 7000000
9561 chan.context.feerate_per_kw = 6216010;
9562 chan.context.holder_dust_limit_satoshis = 4001;
9563 chan.context.channel_type = ChannelTypeFeatures::anchors_zero_htlc_fee_and_dependencies();
9565 test_commitment_with_anchors!("30450221008fd5dbff02e4b59020d4cd23a3c30d3e287065fda75a0a09b402980adf68ccda022001e0b8b620cd915ddff11f1de32addf23d81d51b90e6841b2cb8dcaf3faa5ecf",
9566 "30450221009ad80792e3038fe6968d12ff23e6888a565c3ddd065037f357445f01675d63f3022018384915e5f1f4ae157e15debf4f49b61c8d9d2b073c7d6f97c4a68caa3ed4c1",
9567 "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", {});
9569 // commitment tx with fee greater than funder amount
9570 chan.context.value_to_self_msat = 6993000000; // 7000000000 - 7000000
9571 chan.context.feerate_per_kw = 9651936;
9572 chan.context.holder_dust_limit_satoshis = 546;
9573 chan.context.channel_type = cached_channel_type;
9575 test_commitment!("304402202ade0142008309eb376736575ad58d03e5b115499709c6db0b46e36ff394b492022037b63d78d66404d6504d4c4ac13be346f3d1802928a6d3ad95a6a944227161a2",
9576 "304402207e8d51e0c570a5868a78414f4e0cbfaed1106b171b9581542c30718ee4eb95ba02203af84194c97adf98898c9afe2f2ed4a7f8dba05a2dfab28ac9d9c604aa49a379",
9577 "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", {});
9579 // commitment tx with 3 htlc outputs, 2 offered having the same amount and preimage
9580 chan.context.value_to_self_msat = 7_000_000_000 - 2_000_000;
9581 chan.context.feerate_per_kw = 253;
9582 chan.context.pending_inbound_htlcs.clear();
9583 chan.context.pending_inbound_htlcs.push({
9584 let mut out = InboundHTLCOutput{
9586 amount_msat: 2000000,
9588 payment_hash: PaymentHash([0; 32]),
9589 state: InboundHTLCState::Committed,
9591 out.payment_hash.0 = Sha256::hash(&<Vec<u8>>::from_hex("0101010101010101010101010101010101010101010101010101010101010101").unwrap()).to_byte_array();
9594 chan.context.pending_outbound_htlcs.clear();
9595 chan.context.pending_outbound_htlcs.push({
9596 let mut out = OutboundHTLCOutput{
9598 amount_msat: 5000001,
9600 payment_hash: PaymentHash([0; 32]),
9601 state: OutboundHTLCState::Committed,
9602 source: HTLCSource::dummy(),
9603 skimmed_fee_msat: None,
9604 blinding_point: None,
9606 out.payment_hash.0 = Sha256::hash(&<Vec<u8>>::from_hex("0505050505050505050505050505050505050505050505050505050505050505").unwrap()).to_byte_array();
9609 chan.context.pending_outbound_htlcs.push({
9610 let mut out = OutboundHTLCOutput{
9612 amount_msat: 5000000,
9614 payment_hash: PaymentHash([0; 32]),
9615 state: OutboundHTLCState::Committed,
9616 source: HTLCSource::dummy(),
9617 skimmed_fee_msat: None,
9618 blinding_point: None,
9620 out.payment_hash.0 = Sha256::hash(&<Vec<u8>>::from_hex("0505050505050505050505050505050505050505050505050505050505050505").unwrap()).to_byte_array();
9624 test_commitment!("304402207d0870964530f97b62497b11153c551dca0a1e226815ef0a336651158da0f82402200f5378beee0e77759147b8a0a284decd11bfd2bc55c8fafa41c134fe996d43c8",
9625 "304402200d10bf5bc5397fc59d7188ae438d80c77575595a2d488e41bd6363a810cc8d72022012b57e714fbbfdf7a28c47d5b370cb8ac37c8545f596216e5b21e9b236ef457c",
9626 "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", {
9629 "3045022100b470fe12e5b7fea9eccb8cbff1972cea4f96758041898982a02bcc7f9d56d50b0220338a75b2afaab4ec00cdd2d9273c68c7581ff5a28bcbb40c4d138b81f1d45ce5",
9630 "3044022017b90c65207522a907fb6a137f9dd528b3389465a8ae72308d9e1d564f512cf402204fc917b4f0e88604a3e994f85bfae7c7c1f9d9e9f78e8cd112e0889720d9405b",
9631 "020000000001014bdccf28653066a2c554cafeffdfe1e678e64a69b056684deb0c4fba909423ec000000000000000000011f070000000000002200204adb4e2f00643db396dd120d4e7dc17625f5f2c11a40d857accc862d6b7dd80e0500483045022100b470fe12e5b7fea9eccb8cbff1972cea4f96758041898982a02bcc7f9d56d50b0220338a75b2afaab4ec00cdd2d9273c68c7581ff5a28bcbb40c4d138b81f1d45ce501473044022017b90c65207522a907fb6a137f9dd528b3389465a8ae72308d9e1d564f512cf402204fc917b4f0e88604a3e994f85bfae7c7c1f9d9e9f78e8cd112e0889720d9405b012001010101010101010101010101010101010101010101010101010101010101018a76a91414011f7254d96b819c76986c277d115efce6f7b58763ac67210394854aa6eab5b2a8122cc726e9dded053a2184d88256816826d6231c068d4a5b7c8201208763a9144b6b2e5444c2639cc0fb7bcea5afba3f3cdce23988527c21030d417a46946384f88d5f3337267c5e579765875dc4daca813e21734b140639e752ae677502f501b175ac686800000000" },
9633 "3045022100b575379f6d8743cb0087648f81cfd82d17a97fbf8f67e058c65ce8b9d25df9500220554a210d65b02d9f36c6adf0f639430ca8293196ba5089bf67cc3a9813b7b00a",
9634 "3045022100ee2e16b90930a479b13f8823a7f14b600198c838161160b9436ed086d3fc57e002202a66fa2324f342a17129949c640bfe934cbc73a869ba7c06aa25c5a3d0bfb53d",
9635 "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" },
9637 "30440220471c9f3ad92e49b13b7b8059f43ecf8f7887b0dccbb9fdb54bfe23d62a8ae332022024bd22fae0740e86a44228c35330da9526fd7306dffb2b9dc362d5e78abef7cc",
9638 "304402207157f452f2506d73c315192311893800cfb3cc235cc1185b1cfcc136b55230db022014be242dbc6c5da141fec4034e7f387f74d6ff1899453d72ba957467540e1ecb",
9639 "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" }
9642 chan.context.channel_type = ChannelTypeFeatures::anchors_zero_htlc_fee_and_dependencies();
9643 test_commitment_with_anchors!("3044022027b38dfb654c34032ffb70bb43022981652fce923cbbe3cbe7394e2ade8b34230220584195b78da6e25c2e8da6b4308d9db25b65b64975db9266163ef592abb7c725",
9644 "3045022100b4014970d9d7962853f3f85196144671d7d5d87426250f0a5fdaf9a55292e92502205360910c9abb397467e19dbd63d081deb4a3240903114c98cec0a23591b79b76",
9645 "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", {
9648 "30440220078fe5343dab88c348a3a8a9c1a9293259dbf35507ae971702cc39dd623ea9af022011ed0c0f35243cd0bb4d9ca3c772379b2b5f4af93140e9fdc5600dfec1cdb0c2",
9649 "304402205df665e2908c7690d2d33eb70e6e119958c28febe141a94ed0dd9a55ce7c8cfc0220364d02663a5d019af35c5cd5fda9465d985d85bbd12db207738d61163449a424",
9650 "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" },
9652 "304402202df6bf0f98a42cfd0172a16bded7d1b16c14f5f42ba23f5c54648c14b647531302200fe1508626817f23925bb56951d5e4b2654c751743ab6db48a6cce7dda17c01c",
9653 "304402203f99ec05cdd89558a23683b471c1dcce8f6a92295f1fff3b0b5d21be4d4f97ea022019d29070690fc2c126fe27cc4ab2f503f289d362721b2efa7418e7fddb939a5b",
9654 "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" },
9656 "3045022100bd206b420c495f3aa714d3ea4766cbe95441deacb5d2f737f1913349aee7c2ae02200249d2c950dd3b15326bf378ae5d2b871d33d6737f5d70735f3de8383140f2a1",
9657 "3045022100f2cd35e385b9b7e15b92a5d78d120b6b2c5af4e974bc01e884c5facb3bb5966c0220706e0506477ce809a40022d6de8e041e9ef13136c45abee9c36f58a01fdb188b",
9658 "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" }
9663 fn test_per_commitment_secret_gen() {
9664 // Test vectors from BOLT 3 Appendix D:
9666 let mut seed = [0; 32];
9667 seed[0..32].clone_from_slice(&<Vec<u8>>::from_hex("0000000000000000000000000000000000000000000000000000000000000000").unwrap());
9668 assert_eq!(chan_utils::build_commitment_secret(&seed, 281474976710655),
9669 <Vec<u8>>::from_hex("02a40c85b6f28da08dfdbe0926c53fab2de6d28c10301f8f7c4073d5e42e3148").unwrap()[..]);
9671 seed[0..32].clone_from_slice(&<Vec<u8>>::from_hex("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF").unwrap());
9672 assert_eq!(chan_utils::build_commitment_secret(&seed, 281474976710655),
9673 <Vec<u8>>::from_hex("7cc854b54e3e0dcdb010d7a3fee464a9687be6e8db3be6854c475621e007a5dc").unwrap()[..]);
9675 assert_eq!(chan_utils::build_commitment_secret(&seed, 0xaaaaaaaaaaa),
9676 <Vec<u8>>::from_hex("56f4008fb007ca9acf0e15b054d5c9fd12ee06cea347914ddbaed70d1c13a528").unwrap()[..]);
9678 assert_eq!(chan_utils::build_commitment_secret(&seed, 0x555555555555),
9679 <Vec<u8>>::from_hex("9015daaeb06dba4ccc05b91b2f73bd54405f2be9f217fbacd3c5ac2e62327d31").unwrap()[..]);
9681 seed[0..32].clone_from_slice(&<Vec<u8>>::from_hex("0101010101010101010101010101010101010101010101010101010101010101").unwrap());
9682 assert_eq!(chan_utils::build_commitment_secret(&seed, 1),
9683 <Vec<u8>>::from_hex("915c75942a26bb3a433a8ce2cb0427c29ec6c1775cfc78328b57f6ba7bfeaa9c").unwrap()[..]);
9687 fn test_key_derivation() {
9688 // Test vectors from BOLT 3 Appendix E:
9689 let secp_ctx = Secp256k1::new();
9691 let base_secret = SecretKey::from_slice(&<Vec<u8>>::from_hex("000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f").unwrap()[..]).unwrap();
9692 let per_commitment_secret = SecretKey::from_slice(&<Vec<u8>>::from_hex("1f1e1d1c1b1a191817161514131211100f0e0d0c0b0a09080706050403020100").unwrap()[..]).unwrap();
9694 let base_point = PublicKey::from_secret_key(&secp_ctx, &base_secret);
9695 assert_eq!(base_point.serialize()[..], <Vec<u8>>::from_hex("036d6caac248af96f6afa7f904f550253a0f3ef3f5aa2fe6838a95b216691468e2").unwrap()[..]);
9697 let per_commitment_point = PublicKey::from_secret_key(&secp_ctx, &per_commitment_secret);
9698 assert_eq!(per_commitment_point.serialize()[..], <Vec<u8>>::from_hex("025f7117a78150fe2ef97db7cfc83bd57b2e2c0d0dd25eaf467a4a1c2a45ce1486").unwrap()[..]);
9700 assert_eq!(chan_utils::derive_private_key(&secp_ctx, &per_commitment_point, &base_secret),
9701 SecretKey::from_slice(&<Vec<u8>>::from_hex("cbced912d3b21bf196a766651e436aff192362621ce317704ea2f75d87e7be0f").unwrap()[..]).unwrap());
9703 assert_eq!(RevocationKey::from_basepoint(&secp_ctx, &RevocationBasepoint::from(base_point), &per_commitment_point).to_public_key().serialize()[..],
9704 <Vec<u8>>::from_hex("02916e326636d19c33f13e8c0c3a03dd157f332f3e99c317c141dd865eb01f8ff0").unwrap()[..]);
9706 assert_eq!(chan_utils::derive_private_revocation_key(&secp_ctx, &per_commitment_secret, &base_secret),
9707 SecretKey::from_slice(&<Vec<u8>>::from_hex("d09ffff62ddb2297ab000cc85bcb4283fdeb6aa052affbc9dddcf33b61078110").unwrap()[..]).unwrap());
9711 fn test_zero_conf_channel_type_support() {
9712 let feeest = LowerBoundedFeeEstimator::new(&TestFeeEstimator{fee_est: 15000});
9713 let secp_ctx = Secp256k1::new();
9714 let seed = [42; 32];
9715 let network = Network::Testnet;
9716 let keys_provider = test_utils::TestKeysInterface::new(&seed, network);
9717 let logger = test_utils::TestLogger::new();
9719 let node_b_node_id = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[42; 32]).unwrap());
9720 let config = UserConfig::default();
9721 let node_a_chan = OutboundV1Channel::<&TestKeysInterface>::new(&feeest, &&keys_provider, &&keys_provider,
9722 node_b_node_id, &channelmanager::provided_init_features(&config), 10000000, 100000, 42, &config, 0, 42, None).unwrap();
9724 let mut channel_type_features = ChannelTypeFeatures::only_static_remote_key();
9725 channel_type_features.set_zero_conf_required();
9727 let mut open_channel_msg = node_a_chan.get_open_channel(ChainHash::using_genesis_block(network));
9728 open_channel_msg.channel_type = Some(channel_type_features);
9729 let node_b_node_id = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[7; 32]).unwrap());
9730 let res = InboundV1Channel::<&TestKeysInterface>::new(&feeest, &&keys_provider, &&keys_provider,
9731 node_b_node_id, &channelmanager::provided_channel_type_features(&config),
9732 &channelmanager::provided_init_features(&config), &open_channel_msg, 7, &config, 0, &&logger, /*is_0conf=*/false);
9733 assert!(res.is_ok());
9737 fn test_supports_anchors_zero_htlc_tx_fee() {
9738 // Tests that if both sides support and negotiate `anchors_zero_fee_htlc_tx`, it is the
9739 // resulting `channel_type`.
9740 let secp_ctx = Secp256k1::new();
9741 let fee_estimator = LowerBoundedFeeEstimator::new(&TestFeeEstimator{fee_est: 15000});
9742 let network = Network::Testnet;
9743 let keys_provider = test_utils::TestKeysInterface::new(&[42; 32], network);
9744 let logger = test_utils::TestLogger::new();
9746 let node_id_a = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[1; 32]).unwrap());
9747 let node_id_b = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[2; 32]).unwrap());
9749 let mut config = UserConfig::default();
9750 config.channel_handshake_config.negotiate_anchors_zero_fee_htlc_tx = true;
9752 // It is not enough for just the initiator to signal `option_anchors_zero_fee_htlc_tx`, both
9753 // need to signal it.
9754 let channel_a = OutboundV1Channel::<&TestKeysInterface>::new(
9755 &fee_estimator, &&keys_provider, &&keys_provider, node_id_b,
9756 &channelmanager::provided_init_features(&UserConfig::default()), 10000000, 100000, 42,
9757 &config, 0, 42, None
9759 assert!(!channel_a.context.channel_type.supports_anchors_zero_fee_htlc_tx());
9761 let mut expected_channel_type = ChannelTypeFeatures::empty();
9762 expected_channel_type.set_static_remote_key_required();
9763 expected_channel_type.set_anchors_zero_fee_htlc_tx_required();
9765 let channel_a = OutboundV1Channel::<&TestKeysInterface>::new(
9766 &fee_estimator, &&keys_provider, &&keys_provider, node_id_b,
9767 &channelmanager::provided_init_features(&config), 10000000, 100000, 42, &config, 0, 42,
9771 let open_channel_msg = channel_a.get_open_channel(ChainHash::using_genesis_block(network));
9772 let channel_b = InboundV1Channel::<&TestKeysInterface>::new(
9773 &fee_estimator, &&keys_provider, &&keys_provider, node_id_a,
9774 &channelmanager::provided_channel_type_features(&config), &channelmanager::provided_init_features(&config),
9775 &open_channel_msg, 7, &config, 0, &&logger, /*is_0conf=*/false
9778 assert_eq!(channel_a.context.channel_type, expected_channel_type);
9779 assert_eq!(channel_b.context.channel_type, expected_channel_type);
9783 fn test_rejects_implicit_simple_anchors() {
9784 // Tests that if `option_anchors` is being negotiated implicitly through the intersection of
9785 // each side's `InitFeatures`, it is rejected.
9786 let secp_ctx = Secp256k1::new();
9787 let fee_estimator = LowerBoundedFeeEstimator::new(&TestFeeEstimator{fee_est: 15000});
9788 let network = Network::Testnet;
9789 let keys_provider = test_utils::TestKeysInterface::new(&[42; 32], network);
9790 let logger = test_utils::TestLogger::new();
9792 let node_id_a = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[1; 32]).unwrap());
9793 let node_id_b = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[2; 32]).unwrap());
9795 let config = UserConfig::default();
9797 // See feature bit assignments: https://github.com/lightning/bolts/blob/master/09-features.md
9798 let static_remote_key_required: u64 = 1 << 12;
9799 let simple_anchors_required: u64 = 1 << 20;
9800 let raw_init_features = static_remote_key_required | simple_anchors_required;
9801 let init_features_with_simple_anchors = InitFeatures::from_le_bytes(raw_init_features.to_le_bytes().to_vec());
9803 let channel_a = OutboundV1Channel::<&TestKeysInterface>::new(
9804 &fee_estimator, &&keys_provider, &&keys_provider, node_id_b,
9805 &channelmanager::provided_init_features(&config), 10000000, 100000, 42, &config, 0, 42,
9809 // Set `channel_type` to `None` to force the implicit feature negotiation.
9810 let mut open_channel_msg = channel_a.get_open_channel(ChainHash::using_genesis_block(network));
9811 open_channel_msg.channel_type = None;
9813 // Since A supports both `static_remote_key` and `option_anchors`, but B only accepts
9814 // `static_remote_key`, it will fail the channel.
9815 let channel_b = InboundV1Channel::<&TestKeysInterface>::new(
9816 &fee_estimator, &&keys_provider, &&keys_provider, node_id_a,
9817 &channelmanager::provided_channel_type_features(&config), &init_features_with_simple_anchors,
9818 &open_channel_msg, 7, &config, 0, &&logger, /*is_0conf=*/false
9820 assert!(channel_b.is_err());
9824 fn test_rejects_simple_anchors_channel_type() {
9825 // Tests that if `option_anchors` is being negotiated through the `channel_type` feature,
9827 let secp_ctx = Secp256k1::new();
9828 let fee_estimator = LowerBoundedFeeEstimator::new(&TestFeeEstimator{fee_est: 15000});
9829 let network = Network::Testnet;
9830 let keys_provider = test_utils::TestKeysInterface::new(&[42; 32], network);
9831 let logger = test_utils::TestLogger::new();
9833 let node_id_a = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[1; 32]).unwrap());
9834 let node_id_b = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[2; 32]).unwrap());
9836 let config = UserConfig::default();
9838 // See feature bit assignments: https://github.com/lightning/bolts/blob/master/09-features.md
9839 let static_remote_key_required: u64 = 1 << 12;
9840 let simple_anchors_required: u64 = 1 << 20;
9841 let simple_anchors_raw_features = static_remote_key_required | simple_anchors_required;
9842 let simple_anchors_init = InitFeatures::from_le_bytes(simple_anchors_raw_features.to_le_bytes().to_vec());
9843 let simple_anchors_channel_type = ChannelTypeFeatures::from_le_bytes(simple_anchors_raw_features.to_le_bytes().to_vec());
9844 assert!(!simple_anchors_init.requires_unknown_bits());
9845 assert!(!simple_anchors_channel_type.requires_unknown_bits());
9847 // First, we'll try to open a channel between A and B where A requests a channel type for
9848 // the original `option_anchors` feature (non zero fee htlc tx). This should be rejected by
9849 // B as it's not supported by LDK.
9850 let channel_a = OutboundV1Channel::<&TestKeysInterface>::new(
9851 &fee_estimator, &&keys_provider, &&keys_provider, node_id_b,
9852 &channelmanager::provided_init_features(&config), 10000000, 100000, 42, &config, 0, 42,
9856 let mut open_channel_msg = channel_a.get_open_channel(ChainHash::using_genesis_block(network));
9857 open_channel_msg.channel_type = Some(simple_anchors_channel_type.clone());
9859 let res = InboundV1Channel::<&TestKeysInterface>::new(
9860 &fee_estimator, &&keys_provider, &&keys_provider, node_id_a,
9861 &channelmanager::provided_channel_type_features(&config), &simple_anchors_init,
9862 &open_channel_msg, 7, &config, 0, &&logger, /*is_0conf=*/false
9864 assert!(res.is_err());
9866 // Then, we'll try to open another channel where A requests a channel type for
9867 // `anchors_zero_fee_htlc_tx`. B is malicious and tries to downgrade the channel type to the
9868 // original `option_anchors` feature, which should be rejected by A as it's not supported by
9870 let mut channel_a = OutboundV1Channel::<&TestKeysInterface>::new(
9871 &fee_estimator, &&keys_provider, &&keys_provider, node_id_b, &simple_anchors_init,
9872 10000000, 100000, 42, &config, 0, 42, None
9875 let open_channel_msg = channel_a.get_open_channel(ChainHash::using_genesis_block(network));
9877 let channel_b = InboundV1Channel::<&TestKeysInterface>::new(
9878 &fee_estimator, &&keys_provider, &&keys_provider, node_id_a,
9879 &channelmanager::provided_channel_type_features(&config), &channelmanager::provided_init_features(&config),
9880 &open_channel_msg, 7, &config, 0, &&logger, /*is_0conf=*/false
9883 let mut accept_channel_msg = channel_b.get_accept_channel_message();
9884 accept_channel_msg.channel_type = Some(simple_anchors_channel_type.clone());
9886 let res = channel_a.accept_channel(
9887 &accept_channel_msg, &config.channel_handshake_limits, &simple_anchors_init
9889 assert!(res.is_err());
9893 fn test_waiting_for_batch() {
9894 let feeest = LowerBoundedFeeEstimator::new(&TestFeeEstimator{fee_est: 15000});
9895 let logger = test_utils::TestLogger::new();
9896 let secp_ctx = Secp256k1::new();
9897 let seed = [42; 32];
9898 let network = Network::Testnet;
9899 let best_block = BestBlock::from_network(network);
9900 let chain_hash = ChainHash::using_genesis_block(network);
9901 let keys_provider = test_utils::TestKeysInterface::new(&seed, network);
9903 let mut config = UserConfig::default();
9904 // Set trust_own_funding_0conf while ensuring we don't send channel_ready for a
9905 // channel in a batch before all channels are ready.
9906 config.channel_handshake_limits.trust_own_funding_0conf = true;
9908 // Create a channel from node a to node b that will be part of batch funding.
9909 let node_b_node_id = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[42; 32]).unwrap());
9910 let mut node_a_chan = OutboundV1Channel::<&TestKeysInterface>::new(
9915 &channelmanager::provided_init_features(&config),
9925 let open_channel_msg = node_a_chan.get_open_channel(ChainHash::using_genesis_block(network));
9926 let node_b_node_id = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[7; 32]).unwrap());
9927 let mut node_b_chan = InboundV1Channel::<&TestKeysInterface>::new(
9932 &channelmanager::provided_channel_type_features(&config),
9933 &channelmanager::provided_init_features(&config),
9939 true, // Allow node b to send a 0conf channel_ready.
9942 let accept_channel_msg = node_b_chan.accept_inbound_channel();
9943 node_a_chan.accept_channel(
9944 &accept_channel_msg,
9945 &config.channel_handshake_limits,
9946 &channelmanager::provided_init_features(&config),
9949 // Fund the channel with a batch funding transaction.
9950 let output_script = node_a_chan.context.get_funding_redeemscript();
9951 let tx = Transaction {
9953 lock_time: LockTime::ZERO,
9957 value: 10000000, script_pubkey: output_script.clone(),
9960 value: 10000000, script_pubkey: Builder::new().into_script(),
9963 let funding_outpoint = OutPoint{ txid: tx.txid(), index: 0 };
9964 let funding_created_msg = node_a_chan.get_funding_created(
9965 tx.clone(), funding_outpoint, true, &&logger,
9966 ).map_err(|_| ()).unwrap();
9967 let (mut node_b_chan, funding_signed_msg, _) = node_b_chan.funding_created(
9968 &funding_created_msg.unwrap(),
9972 ).map_err(|_| ()).unwrap();
9973 let node_b_updates = node_b_chan.monitor_updating_restored(
9981 // Receive funding_signed, but the channel will be configured to hold sending channel_ready and
9982 // broadcasting the funding transaction until the batch is ready.
9983 let res = node_a_chan.funding_signed(
9984 &funding_signed_msg.unwrap(), best_block, &&keys_provider, &&logger,
9986 let (mut node_a_chan, _) = if let Ok(res) = res { res } else { panic!(); };
9987 let node_a_updates = node_a_chan.monitor_updating_restored(
9994 // Our channel_ready shouldn't be sent yet, even with trust_own_funding_0conf set,
9995 // as the funding transaction depends on all channels in the batch becoming ready.
9996 assert!(node_a_updates.channel_ready.is_none());
9997 assert!(node_a_updates.funding_broadcastable.is_none());
9998 assert_eq!(node_a_chan.context.channel_state, ChannelState::AwaitingChannelReady(AwaitingChannelReadyFlags::WAITING_FOR_BATCH));
10000 // It is possible to receive a 0conf channel_ready from the remote node.
10001 node_a_chan.channel_ready(
10002 &node_b_updates.channel_ready.unwrap(),
10010 node_a_chan.context.channel_state,
10011 ChannelState::AwaitingChannelReady(AwaitingChannelReadyFlags::WAITING_FOR_BATCH | AwaitingChannelReadyFlags::THEIR_CHANNEL_READY)
10014 // Clear the ChannelState::WaitingForBatch only when called by ChannelManager.
10015 node_a_chan.set_batch_ready();
10016 assert_eq!(node_a_chan.context.channel_state, ChannelState::AwaitingChannelReady(AwaitingChannelReadyFlags::THEIR_CHANNEL_READY));
10017 assert!(node_a_chan.check_get_channel_ready(0).is_some());