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::script::{Script,Builder};
11 use bitcoin::blockdata::transaction::{Transaction, EcdsaSighashType};
12 use bitcoin::util::sighash;
13 use bitcoin::consensus::encode;
15 use bitcoin::hashes::Hash;
16 use bitcoin::hashes::sha256::Hash as Sha256;
17 use bitcoin::hashes::sha256d::Hash as Sha256d;
18 use bitcoin::hash_types::{Txid, BlockHash};
20 use bitcoin::secp256k1::constants::PUBLIC_KEY_SIZE;
21 use bitcoin::secp256k1::{PublicKey,SecretKey};
22 use bitcoin::secp256k1::{Secp256k1,ecdsa::Signature};
23 use bitcoin::secp256k1;
25 use ln::{PaymentPreimage, PaymentHash};
26 use ln::features::{ChannelFeatures, ChannelTypeFeatures, InitFeatures};
28 use ln::msgs::{DecodeError, OptionalField, DataLossProtect};
29 use ln::script::{self, ShutdownScript};
30 use ln::channelmanager::{CounterpartyForwardingInfo, PendingHTLCStatus, HTLCSource, HTLCFailReason, HTLCFailureMsg, PendingHTLCInfo, RAACommitmentOrder, BREAKDOWN_TIMEOUT, MIN_CLTV_EXPIRY_DELTA, MAX_LOCAL_BREAKDOWN_TIMEOUT};
31 use 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 chain::chaininterface::{FeeEstimator,ConfirmationTarget};
35 use chain::channelmonitor::{ChannelMonitor, ChannelMonitorUpdate, ChannelMonitorUpdateStep, LATENCY_GRACE_PERIOD_BLOCKS};
36 use chain::transaction::{OutPoint, TransactionData};
37 use chain::keysinterface::{Sign, KeysInterface};
38 use util::events::ClosureReason;
39 use util::ser::{Readable, ReadableArgs, Writeable, Writer, VecWriter};
40 use util::logger::Logger;
41 use util::errors::APIError;
42 use util::config::{UserConfig, ChannelConfig, LegacyChannelConfig, ChannelHandshakeConfig, ChannelHandshakeLimits};
43 use util::scid_utils::scid_from_parts;
47 use core::{cmp,mem,fmt};
49 #[cfg(any(test, fuzzing, debug_assertions))]
51 use bitcoin::hashes::hex::ToHex;
54 pub struct ChannelValueStat {
55 pub value_to_self_msat: u64,
56 pub channel_value_msat: u64,
57 pub channel_reserve_msat: u64,
58 pub pending_outbound_htlcs_amount_msat: u64,
59 pub pending_inbound_htlcs_amount_msat: u64,
60 pub holding_cell_outbound_amount_msat: u64,
61 pub counterparty_max_htlc_value_in_flight_msat: u64, // outgoing
62 pub counterparty_dust_limit_msat: u64,
65 pub struct AvailableBalances {
66 /// The amount that would go to us if we close the channel, ignoring any on-chain fees.
67 pub balance_msat: u64,
68 /// Total amount available for our counterparty to send to us.
69 pub inbound_capacity_msat: u64,
70 /// Total amount available for us to send to our counterparty.
71 pub outbound_capacity_msat: u64,
72 /// The maximum value we can assign to the next outbound HTLC
73 pub next_outbound_htlc_limit_msat: u64,
76 #[derive(Debug, Clone, Copy, PartialEq)]
78 // Inbound states mirroring InboundHTLCState
80 AwaitingRemoteRevokeToAnnounce,
81 // Note that we do not have a AwaitingAnnouncedRemoteRevoke variant here as it is universally
82 // handled the same as `Committed`, with the only exception in `InboundHTLCState` being the
83 // distinction of when we allow ourselves to forward the HTLC. Because we aren't "forwarding"
84 // the fee update anywhere, we can simply consider the fee update `Committed` immediately
85 // instead of setting it to AwaitingAnnouncedRemoteRevoke.
87 // Outbound state can only be `LocalAnnounced` or `Committed`
91 enum InboundHTLCRemovalReason {
92 FailRelay(msgs::OnionErrorPacket),
93 FailMalformed(([u8; 32], u16)),
94 Fulfill(PaymentPreimage),
97 enum InboundHTLCState {
98 /// Offered by remote, to be included in next local commitment tx. I.e., the remote sent an
99 /// update_add_htlc message for this HTLC.
100 RemoteAnnounced(PendingHTLCStatus),
101 /// Included in a received commitment_signed message (implying we've
102 /// revoke_and_ack'd it), but the remote hasn't yet revoked their previous
103 /// state (see the example below). We have not yet included this HTLC in a
104 /// commitment_signed message because we are waiting on the remote's
105 /// aforementioned state revocation. One reason this missing remote RAA
106 /// (revoke_and_ack) blocks us from constructing a commitment_signed message
107 /// is because every time we create a new "state", i.e. every time we sign a
108 /// new commitment tx (see [BOLT #2]), we need a new per_commitment_point,
109 /// which are provided one-at-a-time in each RAA. E.g., the last RAA they
110 /// sent provided the per_commitment_point for our current commitment tx.
111 /// The other reason we should not send a commitment_signed without their RAA
112 /// is because their RAA serves to ACK our previous commitment_signed.
114 /// Here's an example of how an HTLC could come to be in this state:
115 /// remote --> update_add_htlc(prev_htlc) --> local
116 /// remote --> commitment_signed(prev_htlc) --> local
117 /// remote <-- revoke_and_ack <-- local
118 /// remote <-- commitment_signed(prev_htlc) <-- local
119 /// [note that here, the remote does not respond with a RAA]
120 /// remote --> update_add_htlc(this_htlc) --> local
121 /// remote --> commitment_signed(prev_htlc, this_htlc) --> local
122 /// Now `this_htlc` will be assigned this state. It's unable to be officially
123 /// accepted, i.e. included in a commitment_signed, because we're missing the
124 /// RAA that provides our next per_commitment_point. The per_commitment_point
125 /// is used to derive commitment keys, which are used to construct the
126 /// signatures in a commitment_signed message.
127 /// Implies AwaitingRemoteRevoke.
129 /// [BOLT #2]: https://github.com/lightning/bolts/blob/master/02-peer-protocol.md
130 AwaitingRemoteRevokeToAnnounce(PendingHTLCStatus),
131 /// Included in a received commitment_signed message (implying we've revoke_and_ack'd it).
132 /// We have also included this HTLC in our latest commitment_signed and are now just waiting
133 /// on the remote's revoke_and_ack to make this HTLC an irrevocable part of the state of the
134 /// channel (before it can then get forwarded and/or removed).
135 /// Implies AwaitingRemoteRevoke.
136 AwaitingAnnouncedRemoteRevoke(PendingHTLCStatus),
138 /// Removed by us and a new commitment_signed was sent (if we were AwaitingRemoteRevoke when we
139 /// created it we would have put it in the holding cell instead). When they next revoke_and_ack
141 /// Note that we have to keep an eye on the HTLC until we've received a broadcastable
142 /// commitment transaction without it as otherwise we'll have to force-close the channel to
143 /// claim it before the timeout (obviously doesn't apply to revoked HTLCs that we can't claim
144 /// anyway). That said, ChannelMonitor does this for us (see
145 /// ChannelMonitor::should_broadcast_holder_commitment_txn) so we actually remove the HTLC from
146 /// our own local state before then, once we're sure that the next commitment_signed and
147 /// ChannelMonitor::provide_latest_local_commitment_tx will not include this HTLC.
148 LocalRemoved(InboundHTLCRemovalReason),
151 struct InboundHTLCOutput {
155 payment_hash: PaymentHash,
156 state: InboundHTLCState,
159 enum OutboundHTLCState {
160 /// Added by us and included in a commitment_signed (if we were AwaitingRemoteRevoke when we
161 /// created it we would have put it in the holding cell instead). When they next revoke_and_ack
162 /// we will promote to Committed (note that they may not accept it until the next time we
163 /// revoke, but we don't really care about that:
164 /// * they've revoked, so worst case we can announce an old state and get our (option on)
165 /// money back (though we won't), and,
166 /// * we'll send them a revoke when they send a commitment_signed, and since only they're
167 /// allowed to remove it, the "can only be removed once committed on both sides" requirement
168 /// doesn't matter to us and it's up to them to enforce it, worst-case they jump ahead but
169 /// we'll never get out of sync).
170 /// Note that we Box the OnionPacket as it's rather large and we don't want to blow up
171 /// OutboundHTLCOutput's size just for a temporary bit
172 LocalAnnounced(Box<msgs::OnionPacket>),
174 /// Remote removed this (outbound) HTLC. We're waiting on their commitment_signed to finalize
175 /// the change (though they'll need to revoke before we fail the payment).
176 RemoteRemoved(OutboundHTLCOutcome),
177 /// Remote removed this and sent a commitment_signed (implying we've revoke_and_ack'ed it), but
178 /// the remote side hasn't yet revoked their previous state, which we need them to do before we
179 /// can do any backwards failing. Implies AwaitingRemoteRevoke.
180 /// We also have not yet removed this HTLC in a commitment_signed message, and are waiting on a
181 /// remote revoke_and_ack on a previous state before we can do so.
182 AwaitingRemoteRevokeToRemove(OutboundHTLCOutcome),
183 /// Remote removed this and sent a commitment_signed (implying we've revoke_and_ack'ed it), but
184 /// the remote side hasn't yet revoked their previous state, which we need them to do before we
185 /// can do any backwards failing. Implies AwaitingRemoteRevoke.
186 /// We have removed this HTLC in our latest commitment_signed and are now just waiting on a
187 /// revoke_and_ack to drop completely.
188 AwaitingRemovedRemoteRevoke(OutboundHTLCOutcome),
192 enum OutboundHTLCOutcome {
193 Success(Option<PaymentPreimage>),
194 Failure(HTLCFailReason),
197 impl From<Option<HTLCFailReason>> for OutboundHTLCOutcome {
198 fn from(o: Option<HTLCFailReason>) -> Self {
200 None => OutboundHTLCOutcome::Success(None),
201 Some(r) => OutboundHTLCOutcome::Failure(r)
206 impl<'a> Into<Option<&'a HTLCFailReason>> for &'a OutboundHTLCOutcome {
207 fn into(self) -> Option<&'a HTLCFailReason> {
209 OutboundHTLCOutcome::Success(_) => None,
210 OutboundHTLCOutcome::Failure(ref r) => Some(r)
215 struct OutboundHTLCOutput {
219 payment_hash: PaymentHash,
220 state: OutboundHTLCState,
224 /// See AwaitingRemoteRevoke ChannelState for more info
225 enum HTLCUpdateAwaitingACK {
226 AddHTLC { // TODO: Time out if we're getting close to cltv_expiry
230 payment_hash: PaymentHash,
232 onion_routing_packet: msgs::OnionPacket,
235 payment_preimage: PaymentPreimage,
240 err_packet: msgs::OnionErrorPacket,
244 /// There are a few "states" and then a number of flags which can be applied:
245 /// We first move through init with OurInitSent -> TheirInitSent -> FundingCreated -> FundingSent.
246 /// TheirChannelReady and OurChannelReady then get set on FundingSent, and when both are set we
247 /// move on to ChannelFunded.
248 /// Note that PeerDisconnected can be set on both ChannelFunded and FundingSent.
249 /// ChannelFunded can then get all remaining flags set on it, until we finish shutdown, then we
250 /// move on to ShutdownComplete, at which point most calls into this channel are disallowed.
252 /// Implies we have (or are prepared to) send our open_channel/accept_channel message
253 OurInitSent = 1 << 0,
254 /// Implies we have received their open_channel/accept_channel message
255 TheirInitSent = 1 << 1,
256 /// We have sent funding_created and are awaiting a funding_signed to advance to FundingSent.
257 /// Note that this is nonsense for an inbound channel as we immediately generate funding_signed
258 /// upon receipt of funding_created, so simply skip this state.
260 /// Set when we have received/sent funding_created and funding_signed and are thus now waiting
261 /// on the funding transaction to confirm. The ChannelReady flags are set to indicate when we
262 /// and our counterparty consider the funding transaction confirmed.
264 /// Flag which can be set on FundingSent to indicate they sent us a channel_ready message.
265 /// Once both TheirChannelReady and OurChannelReady are set, state moves on to ChannelFunded.
266 TheirChannelReady = 1 << 4,
267 /// Flag which can be set on FundingSent to indicate we sent them a channel_ready message.
268 /// Once both TheirChannelReady and OurChannelReady are set, state moves on to ChannelFunded.
269 OurChannelReady = 1 << 5,
271 /// Flag which is set on ChannelFunded and FundingSent indicating remote side is considered
272 /// "disconnected" and no updates are allowed until after we've done a channel_reestablish
274 PeerDisconnected = 1 << 7,
275 /// Flag which is set on ChannelFunded, FundingCreated, and FundingSent indicating the user has
276 /// told us they failed to update our ChannelMonitor somewhere and we should pause sending any
277 /// outbound messages until they've managed to do so.
278 MonitorUpdateFailed = 1 << 8,
279 /// Flag which implies that we have sent a commitment_signed but are awaiting the responding
280 /// revoke_and_ack message. During this time period, we can't generate new commitment_signed
281 /// messages as then we will be unable to determine which HTLCs they included in their
282 /// revoke_and_ack implicit ACK, so instead we have to hold them away temporarily to be sent
284 /// Flag is set on ChannelFunded.
285 AwaitingRemoteRevoke = 1 << 9,
286 /// Flag which is set on ChannelFunded or FundingSent after receiving a shutdown message from
287 /// the remote end. If set, they may not add any new HTLCs to the channel, and we are expected
288 /// to respond with our own shutdown message when possible.
289 RemoteShutdownSent = 1 << 10,
290 /// Flag which is set on ChannelFunded or FundingSent after sending a shutdown message. At this
291 /// point, we may not add any new HTLCs to the channel.
292 LocalShutdownSent = 1 << 11,
293 /// We've successfully negotiated a closing_signed dance. At this point ChannelManager is about
294 /// to drop us, but we store this anyway.
295 ShutdownComplete = 4096,
297 const BOTH_SIDES_SHUTDOWN_MASK: u32 = ChannelState::LocalShutdownSent as u32 | ChannelState::RemoteShutdownSent as u32;
298 const MULTI_STATE_FLAGS: u32 = BOTH_SIDES_SHUTDOWN_MASK | ChannelState::PeerDisconnected as u32 | ChannelState::MonitorUpdateFailed as u32;
300 pub const INITIAL_COMMITMENT_NUMBER: u64 = (1 << 48) - 1;
302 /// The "channel disabled" bit in channel_update must be set based on whether we are connected to
303 /// our counterparty or not. However, we don't want to announce updates right away to avoid
304 /// spamming the network with updates if the connection is flapping. Instead, we "stage" updates to
305 /// our channel_update message and track the current state here.
306 /// See implementation at [`super::channelmanager::ChannelManager::timer_tick_occurred`].
307 #[derive(Clone, Copy, PartialEq)]
308 pub(super) enum ChannelUpdateStatus {
309 /// We've announced the channel as enabled and are connected to our peer.
311 /// Our channel is no longer live, but we haven't announced the channel as disabled yet.
313 /// Our channel is live again, but we haven't announced the channel as enabled yet.
315 /// We've announced the channel as disabled.
319 /// We track when we sent an `AnnouncementSignatures` to our peer in a few states, described here.
321 pub enum AnnouncementSigsState {
322 /// We have not sent our peer an `AnnouncementSignatures` yet, or our peer disconnected since
323 /// we sent the last `AnnouncementSignatures`.
325 /// We sent an `AnnouncementSignatures` to our peer since the last time our peer disconnected.
326 /// This state never appears on disk - instead we write `NotSent`.
328 /// We sent a `CommitmentSigned` after the last `AnnouncementSignatures` we sent. Because we
329 /// only ever have a single `CommitmentSigned` pending at once, if we sent one after sending
330 /// `AnnouncementSignatures` then we know the peer received our `AnnouncementSignatures` if
331 /// they send back a `RevokeAndACK`.
332 /// This state never appears on disk - instead we write `NotSent`.
334 /// We received a `RevokeAndACK`, effectively ack-ing our `AnnouncementSignatures`, at this
335 /// point we no longer need to re-send our `AnnouncementSignatures` again on reconnect.
339 /// An enum indicating whether the local or remote side offered a given HTLC.
345 /// An enum gathering stats on pending HTLCs, either inbound or outbound side.
348 pending_htlcs_value_msat: u64,
349 on_counterparty_tx_dust_exposure_msat: u64,
350 on_holder_tx_dust_exposure_msat: u64,
351 holding_cell_msat: u64,
352 on_holder_tx_holding_cell_htlcs_count: u32, // dust HTLCs *non*-included
355 /// An enum gathering stats on commitment transaction, either local or remote.
356 struct CommitmentStats<'a> {
357 tx: CommitmentTransaction, // the transaction info
358 feerate_per_kw: u32, // the feerate included to build the transaction
359 total_fee_sat: u64, // the total fee included in the transaction
360 num_nondust_htlcs: usize, // the number of HTLC outputs (dust HTLCs *non*-included)
361 htlcs_included: Vec<(HTLCOutputInCommitment, Option<&'a HTLCSource>)>, // the list of HTLCs (dust HTLCs *included*) which were not ignored when building the transaction
362 local_balance_msat: u64, // local balance before fees but considering dust limits
363 remote_balance_msat: u64, // remote balance before fees but considering dust limits
364 preimages: Vec<PaymentPreimage>, // preimages for successful offered HTLCs since last commitment
367 /// Used when calculating whether we or the remote can afford an additional HTLC.
368 struct HTLCCandidate {
370 origin: HTLCInitiator,
374 fn new(amount_msat: u64, origin: HTLCInitiator) -> Self {
382 /// A return value enum for get_update_fulfill_htlc. See UpdateFulfillCommitFetch variants for
384 enum UpdateFulfillFetch {
386 monitor_update: ChannelMonitorUpdate,
387 htlc_value_msat: u64,
388 msg: Option<msgs::UpdateFulfillHTLC>,
393 /// The return type of get_update_fulfill_htlc_and_commit.
394 pub enum UpdateFulfillCommitFetch {
395 /// Indicates the HTLC fulfill is new, and either generated an update_fulfill message, placed
396 /// it in the holding cell, or re-generated the update_fulfill message after the same claim was
397 /// previously placed in the holding cell (and has since been removed).
399 /// The ChannelMonitorUpdate which places the new payment preimage in the channel monitor
400 monitor_update: ChannelMonitorUpdate,
401 /// The value of the HTLC which was claimed, in msat.
402 htlc_value_msat: u64,
403 /// The update_fulfill message and commitment_signed message (if the claim was not placed
404 /// in the holding cell).
405 msgs: Option<(msgs::UpdateFulfillHTLC, msgs::CommitmentSigned)>,
407 /// Indicates the HTLC fulfill is duplicative and already existed either in the holding cell
408 /// or has been forgotten (presumably previously claimed).
412 /// The return value of `revoke_and_ack` on success, primarily updates to other channels or HTLC
414 pub(super) struct RAAUpdates {
415 pub commitment_update: Option<msgs::CommitmentUpdate>,
416 pub accepted_htlcs: Vec<(PendingHTLCInfo, u64)>,
417 pub failed_htlcs: Vec<(HTLCSource, PaymentHash, HTLCFailReason)>,
418 pub finalized_claimed_htlcs: Vec<HTLCSource>,
419 pub monitor_update: ChannelMonitorUpdate,
420 pub holding_cell_failed_htlcs: Vec<(HTLCSource, PaymentHash)>,
423 /// The return value of `monitor_updating_restored`
424 pub(super) struct MonitorRestoreUpdates {
425 pub raa: Option<msgs::RevokeAndACK>,
426 pub commitment_update: Option<msgs::CommitmentUpdate>,
427 pub order: RAACommitmentOrder,
428 pub accepted_htlcs: Vec<(PendingHTLCInfo, u64)>,
429 pub failed_htlcs: Vec<(HTLCSource, PaymentHash, HTLCFailReason)>,
430 pub finalized_claimed_htlcs: Vec<HTLCSource>,
431 pub funding_broadcastable: Option<Transaction>,
432 pub channel_ready: Option<msgs::ChannelReady>,
433 pub announcement_sigs: Option<msgs::AnnouncementSignatures>,
436 /// The return value of `channel_reestablish`
437 pub(super) struct ReestablishResponses {
438 pub channel_ready: Option<msgs::ChannelReady>,
439 pub raa: Option<msgs::RevokeAndACK>,
440 pub commitment_update: Option<msgs::CommitmentUpdate>,
441 pub order: RAACommitmentOrder,
442 pub mon_update: Option<ChannelMonitorUpdate>,
443 pub holding_cell_failed_htlcs: Vec<(HTLCSource, PaymentHash)>,
444 pub announcement_sigs: Option<msgs::AnnouncementSignatures>,
445 pub shutdown_msg: Option<msgs::Shutdown>,
448 /// If the majority of the channels funds are to the fundee and the initiator holds only just
449 /// enough funds to cover their reserve value, channels are at risk of getting "stuck". Because the
450 /// initiator controls the feerate, if they then go to increase the channel fee, they may have no
451 /// balance but the fundee is unable to send a payment as the increase in fee more than drains
452 /// their reserve value. Thus, neither side can send a new HTLC and the channel becomes useless.
453 /// Thus, before sending an HTLC when we are the initiator, we check that the feerate can increase
454 /// by this multiple without hitting this case, before sending.
455 /// This multiple is effectively the maximum feerate "jump" we expect until more HTLCs flow over
456 /// the channel. Sadly, there isn't really a good number for this - if we expect to have no new
457 /// HTLCs for days we may need this to suffice for feerate increases across days, but that may
458 /// leave the channel less usable as we hold a bigger reserve.
459 #[cfg(any(fuzzing, test))]
460 pub const FEE_SPIKE_BUFFER_FEE_INCREASE_MULTIPLE: u64 = 2;
461 #[cfg(not(any(fuzzing, test)))]
462 const FEE_SPIKE_BUFFER_FEE_INCREASE_MULTIPLE: u64 = 2;
464 /// If we fail to see a funding transaction confirmed on-chain within this many blocks after the
465 /// channel creation on an inbound channel, we simply force-close and move on.
466 /// This constant is the one suggested in BOLT 2.
467 pub(crate) const FUNDING_CONF_DEADLINE_BLOCKS: u32 = 2016;
469 /// In case of a concurrent update_add_htlc proposed by our counterparty, we might
470 /// not have enough balance value remaining to cover the onchain cost of this new
471 /// HTLC weight. If this happens, our counterparty fails the reception of our
472 /// commitment_signed including this new HTLC due to infringement on the channel
474 /// To prevent this case, we compute our outbound update_fee with an HTLC buffer of
475 /// size 2. However, if the number of concurrent update_add_htlc is higher, this still
476 /// leads to a channel force-close. Ultimately, this is an issue coming from the
477 /// design of LN state machines, allowing asynchronous updates.
478 pub(crate) const CONCURRENT_INBOUND_HTLC_FEE_BUFFER: u32 = 2;
480 /// When a channel is opened, we check that the funding amount is enough to pay for relevant
481 /// commitment transaction fees, with at least this many HTLCs present on the commitment
482 /// transaction (not counting the value of the HTLCs themselves).
483 pub(crate) const MIN_AFFORDABLE_HTLC_COUNT: usize = 4;
485 /// When a [`Channel`] has its [`ChannelConfig`] updated, its existing one is stashed for up to this
486 /// number of ticks to allow forwarding HTLCs by nodes that have yet to receive the new
487 /// ChannelUpdate prompted by the config update. This value was determined as follows:
489 /// * The expected interval between ticks (1 minute).
490 /// * The average convergence delay of updates across the network, i.e., ~300 seconds on average
491 /// for a node to see an update as seen on `<https://arxiv.org/pdf/2205.12737.pdf>`.
492 /// * `EXPIRE_PREV_CONFIG_TICKS` = convergence_delay / tick_interval
493 pub(crate) const EXPIRE_PREV_CONFIG_TICKS: usize = 5;
495 // TODO: We should refactor this to be an Inbound/OutboundChannel until initial setup handshaking
496 // has been completed, and then turn into a Channel to get compiler-time enforcement of things like
497 // calling channel_id() before we're set up or things like get_outbound_funding_signed on an
500 // Holder designates channel data owned for the benefice of the user client.
501 // Counterparty designates channel data owned by the another channel participant entity.
502 pub(super) struct Channel<Signer: Sign> {
503 #[cfg(any(test, feature = "_test_utils"))]
504 pub(crate) config: LegacyChannelConfig,
505 #[cfg(not(any(test, feature = "_test_utils")))]
506 config: LegacyChannelConfig,
508 // Track the previous `ChannelConfig` so that we can continue forwarding HTLCs that were
509 // constructed using it. The second element in the tuple corresponds to the number of ticks that
510 // have elapsed since the update occurred.
511 prev_config: Option<(ChannelConfig, usize)>,
513 inbound_handshake_limits_override: Option<ChannelHandshakeLimits>,
517 channel_id: [u8; 32],
520 // When we reach max(6 blocks, minimum_depth), we need to send an AnnouncementSigs message to
521 // our peer. However, we want to make sure they received it, or else rebroadcast it when we
523 // We do so here, see `AnnouncementSigsSent` for more details on the state(s).
524 // Note that a number of our tests were written prior to the behavior here which retransmits
525 // AnnouncementSignatures until after an RAA completes, so the behavior is short-circuited in
527 #[cfg(any(test, feature = "_test_utils"))]
528 pub(crate) announcement_sigs_state: AnnouncementSigsState,
529 #[cfg(not(any(test, feature = "_test_utils")))]
530 announcement_sigs_state: AnnouncementSigsState,
532 secp_ctx: Secp256k1<secp256k1::All>,
533 channel_value_satoshis: u64,
535 latest_monitor_update_id: u64,
537 holder_signer: Signer,
538 shutdown_scriptpubkey: Option<ShutdownScript>,
539 destination_script: Script,
541 // Our commitment numbers start at 2^48-1 and count down, whereas the ones used in transaction
542 // generation start at 0 and count up...this simplifies some parts of implementation at the
543 // cost of others, but should really just be changed.
545 cur_holder_commitment_transaction_number: u64,
546 cur_counterparty_commitment_transaction_number: u64,
547 value_to_self_msat: u64, // Excluding all pending_htlcs, excluding fees
548 pending_inbound_htlcs: Vec<InboundHTLCOutput>,
549 pending_outbound_htlcs: Vec<OutboundHTLCOutput>,
550 holding_cell_htlc_updates: Vec<HTLCUpdateAwaitingACK>,
552 /// When resending CS/RAA messages on channel monitor restoration or on reconnect, we always
553 /// need to ensure we resend them in the order we originally generated them. Note that because
554 /// there can only ever be one in-flight CS and/or one in-flight RAA at any time, it is
555 /// sufficient to simply set this to the opposite of any message we are generating as we
556 /// generate it. ie when we generate a CS, we set this to RAAFirst as, if there is a pending
557 /// in-flight RAA to resend, it will have been the first thing we generated, and thus we should
559 resend_order: RAACommitmentOrder,
561 monitor_pending_channel_ready: bool,
562 monitor_pending_revoke_and_ack: bool,
563 monitor_pending_commitment_signed: bool,
564 monitor_pending_forwards: Vec<(PendingHTLCInfo, u64)>,
565 monitor_pending_failures: Vec<(HTLCSource, PaymentHash, HTLCFailReason)>,
566 monitor_pending_finalized_fulfills: Vec<HTLCSource>,
568 // pending_update_fee is filled when sending and receiving update_fee.
570 // Because it follows the same commitment flow as HTLCs, `FeeUpdateState` is either `Outbound`
571 // or matches a subset of the `InboundHTLCOutput` variants. It is then updated/used when
572 // generating new commitment transactions with exactly the same criteria as inbound/outbound
573 // HTLCs with similar state.
574 pending_update_fee: Option<(u32, FeeUpdateState)>,
575 // If a `send_update_fee()` call is made with ChannelState::AwaitingRemoteRevoke set, we place
576 // it here instead of `pending_update_fee` in the same way as we place outbound HTLC updates in
577 // `holding_cell_htlc_updates` instead of `pending_outbound_htlcs`. It is released into
578 // `pending_update_fee` with the same criteria as outbound HTLC updates but can be updated by
579 // further `send_update_fee` calls, dropping the previous holding cell update entirely.
580 holding_cell_update_fee: Option<u32>,
581 next_holder_htlc_id: u64,
582 next_counterparty_htlc_id: u64,
585 /// The timestamp set on our latest `channel_update` message for this channel. It is updated
586 /// when the channel is updated in ways which may impact the `channel_update` message or when a
587 /// new block is received, ensuring it's always at least moderately close to the current real
589 update_time_counter: u32,
591 #[cfg(debug_assertions)]
592 /// Max to_local and to_remote outputs in a locally-generated commitment transaction
593 holder_max_commitment_tx_output: Mutex<(u64, u64)>,
594 #[cfg(debug_assertions)]
595 /// Max to_local and to_remote outputs in a remote-generated commitment transaction
596 counterparty_max_commitment_tx_output: Mutex<(u64, u64)>,
598 last_sent_closing_fee: Option<(u64, Signature)>, // (fee, holder_sig)
599 target_closing_feerate_sats_per_kw: Option<u32>,
601 /// If our counterparty sent us a closing_signed while we were waiting for a `ChannelMonitor`
602 /// update, we need to delay processing it until later. We do that here by simply storing the
603 /// closing_signed message and handling it in `maybe_propose_closing_signed`.
604 pending_counterparty_closing_signed: Option<msgs::ClosingSigned>,
606 /// The minimum and maximum absolute fee, in satoshis, we are willing to place on the closing
607 /// transaction. These are set once we reach `closing_negotiation_ready`.
609 pub(crate) closing_fee_limits: Option<(u64, u64)>,
611 closing_fee_limits: Option<(u64, u64)>,
613 /// Flag that ensures that `accept_inbound_channel` must be called before `funding_created`
614 /// is executed successfully. The reason for this flag is that when the
615 /// `UserConfig::manually_accept_inbound_channels` config flag is set to true, inbound channels
616 /// are required to be manually accepted by the node operator before the `msgs::AcceptChannel`
617 /// message is created and sent out. During the manual accept process, `accept_inbound_channel`
618 /// is called by `ChannelManager::accept_inbound_channel`.
620 /// The flag counteracts that a counterparty node could theoretically send a
621 /// `msgs::FundingCreated` message before the node operator has manually accepted an inbound
622 /// channel request made by the counterparty node. That would execute `funding_created` before
623 /// `accept_inbound_channel`, and `funding_created` should therefore not execute successfully.
624 inbound_awaiting_accept: bool,
626 /// The hash of the block in which the funding transaction was included.
627 funding_tx_confirmed_in: Option<BlockHash>,
628 funding_tx_confirmation_height: u32,
629 short_channel_id: Option<u64>,
630 /// Either the height at which this channel was created or the height at which it was last
631 /// serialized if it was serialized by versions prior to 0.0.103.
632 /// We use this to close if funding is never broadcasted.
633 channel_creation_height: u32,
635 counterparty_dust_limit_satoshis: u64,
638 pub(super) holder_dust_limit_satoshis: u64,
640 holder_dust_limit_satoshis: u64,
643 pub(super) counterparty_max_htlc_value_in_flight_msat: u64,
645 counterparty_max_htlc_value_in_flight_msat: u64,
648 pub(super) holder_max_htlc_value_in_flight_msat: u64,
650 holder_max_htlc_value_in_flight_msat: u64,
652 /// minimum channel reserve for self to maintain - set by them.
653 counterparty_selected_channel_reserve_satoshis: Option<u64>,
656 pub(super) holder_selected_channel_reserve_satoshis: u64,
658 holder_selected_channel_reserve_satoshis: u64,
660 counterparty_htlc_minimum_msat: u64,
661 holder_htlc_minimum_msat: u64,
663 pub counterparty_max_accepted_htlcs: u16,
665 counterparty_max_accepted_htlcs: u16,
666 //implied by OUR_MAX_HTLCS: max_accepted_htlcs: u16,
667 minimum_depth: Option<u32>,
669 counterparty_forwarding_info: Option<CounterpartyForwardingInfo>,
671 pub(crate) channel_transaction_parameters: ChannelTransactionParameters,
672 funding_transaction: Option<Transaction>,
674 counterparty_cur_commitment_point: Option<PublicKey>,
675 counterparty_prev_commitment_point: Option<PublicKey>,
676 counterparty_node_id: PublicKey,
678 counterparty_shutdown_scriptpubkey: Option<Script>,
680 commitment_secrets: CounterpartyCommitmentSecrets,
682 channel_update_status: ChannelUpdateStatus,
683 /// Once we reach `closing_negotiation_ready`, we set this, indicating if closing_signed does
684 /// not complete within a single timer tick (one minute), we should force-close the channel.
685 /// This prevents us from keeping unusable channels around forever if our counterparty wishes
687 /// Note that this field is reset to false on deserialization to give us a chance to connect to
688 /// our peer and start the closing_signed negotiation fresh.
689 closing_signed_in_flight: bool,
691 /// Our counterparty's channel_announcement signatures provided in announcement_signatures.
692 /// This can be used to rebroadcast the channel_announcement message later.
693 announcement_sigs: Option<(Signature, Signature)>,
695 // We save these values so we can make sure `next_local_commit_tx_fee_msat` and
696 // `next_remote_commit_tx_fee_msat` properly predict what the next commitment transaction fee will
697 // be, by comparing the cached values to the fee of the tranaction generated by
698 // `build_commitment_transaction`.
699 #[cfg(any(test, fuzzing))]
700 next_local_commitment_tx_fee_info_cached: Mutex<Option<CommitmentTxInfoCached>>,
701 #[cfg(any(test, fuzzing))]
702 next_remote_commitment_tx_fee_info_cached: Mutex<Option<CommitmentTxInfoCached>>,
704 /// lnd has a long-standing bug where, upon reconnection, if the channel is not yet confirmed
705 /// they will not send a channel_reestablish until the channel locks in. Then, they will send a
706 /// channel_ready *before* sending the channel_reestablish (which is clearly a violation of
707 /// the BOLT specs). We copy c-lightning's workaround here and simply store the channel_ready
708 /// message until we receive a channel_reestablish.
710 /// See-also <https://github.com/lightningnetwork/lnd/issues/4006>
711 pub workaround_lnd_bug_4006: Option<msgs::ChannelReady>,
713 #[cfg(any(test, fuzzing))]
714 // When we receive an HTLC fulfill on an outbound path, we may immediately fulfill the
715 // corresponding HTLC on the inbound path. If, then, the outbound path channel is
716 // disconnected and reconnected (before we've exchange commitment_signed and revoke_and_ack
717 // messages), they may re-broadcast their update_fulfill_htlc, causing a duplicate claim. This
718 // is fine, but as a sanity check in our failure to generate the second claim, we check here
719 // that the original was a claim, and that we aren't now trying to fulfill a failed HTLC.
720 historical_inbound_htlc_fulfills: HashSet<u64>,
722 /// This channel's type, as negotiated during channel open
723 channel_type: ChannelTypeFeatures,
725 // Our counterparty can offer us SCID aliases which they will map to this channel when routing
726 // outbound payments. These can be used in invoice route hints to avoid explicitly revealing
727 // the channel's funding UTXO.
729 // We also use this when sending our peer a channel_update that isn't to be broadcasted
730 // publicly - allowing them to re-use their map of SCID -> channel for channel_update ->
731 // associated channel mapping.
733 // We only bother storing the most recent SCID alias at any time, though our counterparty has
734 // to store all of them.
735 latest_inbound_scid_alias: Option<u64>,
737 // We always offer our counterparty a static SCID alias, which we recognize as for this channel
738 // if we see it in HTLC forwarding instructions. We don't bother rotating the alias given we
739 // don't currently support node id aliases and eventually privacy should be provided with
740 // blinded paths instead of simple scid+node_id aliases.
741 outbound_scid_alias: u64,
744 #[cfg(any(test, fuzzing))]
745 struct CommitmentTxInfoCached {
747 total_pending_htlcs: usize,
748 next_holder_htlc_id: u64,
749 next_counterparty_htlc_id: u64,
753 pub const OUR_MAX_HTLCS: u16 = 50; //TODO
755 pub(crate) fn commitment_tx_base_weight(opt_anchors: bool) -> u64 {
756 const COMMITMENT_TX_BASE_WEIGHT: u64 = 724;
757 const COMMITMENT_TX_BASE_ANCHOR_WEIGHT: u64 = 1124;
758 if opt_anchors { COMMITMENT_TX_BASE_ANCHOR_WEIGHT } else { COMMITMENT_TX_BASE_WEIGHT }
762 const COMMITMENT_TX_WEIGHT_PER_HTLC: u64 = 172;
764 pub const COMMITMENT_TX_WEIGHT_PER_HTLC: u64 = 172;
766 pub const ANCHOR_OUTPUT_VALUE_SATOSHI: u64 = 330;
768 /// The percentage of the channel value `holder_max_htlc_value_in_flight_msat` used to be set to,
769 /// before this was made configurable. The percentage was made configurable in LDK 0.0.107,
770 /// although LDK 0.0.104+ enabled serialization of channels with a different value set for
771 /// `holder_max_htlc_value_in_flight_msat`.
772 pub const MAX_IN_FLIGHT_PERCENT_LEGACY: u8 = 10;
774 /// Maximum `funding_satoshis` value according to the BOLT #2 specification, if
775 /// `option_support_large_channel` (aka wumbo channels) is not supported.
777 pub const MAX_FUNDING_SATOSHIS_NO_WUMBO: u64 = (1 << 24) - 1;
779 /// Total bitcoin supply in satoshis.
780 pub const TOTAL_BITCOIN_SUPPLY_SATOSHIS: u64 = 21_000_000 * 1_0000_0000;
782 /// The maximum network dust limit for standard script formats. This currently represents the
783 /// minimum output value for a P2SH output before Bitcoin Core 22 considers the entire
784 /// transaction non-standard and thus refuses to relay it.
785 /// We also use this as the maximum counterparty `dust_limit_satoshis` allowed, given many
786 /// implementations use this value for their dust limit today.
787 pub const MAX_STD_OUTPUT_DUST_LIMIT_SATOSHIS: u64 = 546;
789 /// The maximum channel dust limit we will accept from our counterparty.
790 pub const MAX_CHAN_DUST_LIMIT_SATOSHIS: u64 = MAX_STD_OUTPUT_DUST_LIMIT_SATOSHIS;
792 /// The dust limit is used for both the commitment transaction outputs as well as the closing
793 /// transactions. For cooperative closing transactions, we require segwit outputs, though accept
794 /// *any* segwit scripts, which are allowed to be up to 42 bytes in length.
795 /// In order to avoid having to concern ourselves with standardness during the closing process, we
796 /// simply require our counterparty to use a dust limit which will leave any segwit output
798 /// See https://github.com/lightning/bolts/issues/905 for more details.
799 pub const MIN_CHAN_DUST_LIMIT_SATOSHIS: u64 = 354;
801 /// Used to return a simple Error back to ChannelManager. Will get converted to a
802 /// msgs::ErrorAction::SendErrorMessage or msgs::ErrorAction::IgnoreError as appropriate with our
803 /// channel_id in ChannelManager.
804 pub(super) enum ChannelError {
808 CloseDelayBroadcast(String),
811 impl fmt::Debug for ChannelError {
812 fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
814 &ChannelError::Ignore(ref e) => write!(f, "Ignore : {}", e),
815 &ChannelError::Warn(ref e) => write!(f, "Warn : {}", e),
816 &ChannelError::Close(ref e) => write!(f, "Close : {}", e),
817 &ChannelError::CloseDelayBroadcast(ref e) => write!(f, "CloseDelayBroadcast : {}", e)
822 macro_rules! secp_check {
823 ($res: expr, $err: expr) => {
826 Err(_) => return Err(ChannelError::Close($err)),
831 impl<Signer: Sign> Channel<Signer> {
832 /// Returns the value to use for `holder_max_htlc_value_in_flight_msat` as a percentage of the
833 /// `channel_value_satoshis` in msat, set through
834 /// [`ChannelHandshakeConfig::max_inbound_htlc_value_in_flight_percent_of_channel`]
836 /// The effective percentage is lower bounded by 1% and upper bounded by 100%.
838 /// [`ChannelHandshakeConfig::max_inbound_htlc_value_in_flight_percent_of_channel`]: crate::util::config::ChannelHandshakeConfig::max_inbound_htlc_value_in_flight_percent_of_channel
839 fn get_holder_max_htlc_value_in_flight_msat(channel_value_satoshis: u64, config: &ChannelHandshakeConfig) -> u64 {
840 let configured_percent = if config.max_inbound_htlc_value_in_flight_percent_of_channel < 1 {
842 } else if config.max_inbound_htlc_value_in_flight_percent_of_channel > 100 {
845 config.max_inbound_htlc_value_in_flight_percent_of_channel as u64
847 channel_value_satoshis * 10 * configured_percent
850 /// Returns a minimum channel reserve value the remote needs to maintain,
853 /// Guaranteed to return a value no larger than channel_value_satoshis
855 /// This is used both for new channels and to figure out what reserve value we sent to peers
856 /// for channels serialized before we included our selected reserve value in the serialized
858 pub(crate) fn get_holder_selected_channel_reserve_satoshis(channel_value_satoshis: u64) -> u64 {
859 let (q, _) = channel_value_satoshis.overflowing_div(100);
860 cmp::min(channel_value_satoshis, cmp::max(q, 1000)) //TODO
863 pub(crate) fn opt_anchors(&self) -> bool {
864 self.channel_transaction_parameters.opt_anchors.is_some()
867 fn get_initial_channel_type(config: &UserConfig) -> ChannelTypeFeatures {
868 // The default channel type (ie the first one we try) depends on whether the channel is
869 // public - if it is, we just go with `only_static_remotekey` as it's the only option
870 // available. If it's private, we first try `scid_privacy` as it provides better privacy
871 // with no other changes, and fall back to `only_static_remotekey`
872 let mut ret = ChannelTypeFeatures::only_static_remote_key();
873 if !config.channel_handshake_config.announced_channel && config.channel_handshake_config.negotiate_scid_privacy {
874 ret.set_scid_privacy_required();
879 /// If we receive an error message, it may only be a rejection of the channel type we tried,
880 /// not of our ability to open any channel at all. Thus, on error, we should first call this
881 /// and see if we get a new `OpenChannel` message, otherwise the channel is failed.
882 pub(crate) fn maybe_handle_error_without_close(&mut self, chain_hash: BlockHash) -> Result<msgs::OpenChannel, ()> {
883 if !self.is_outbound() || self.channel_state != ChannelState::OurInitSent as u32 { return Err(()); }
884 if self.channel_type == ChannelTypeFeatures::only_static_remote_key() {
885 // We've exhausted our options
888 self.channel_type = ChannelTypeFeatures::only_static_remote_key(); // We only currently support two types
889 Ok(self.get_open_channel(chain_hash))
893 pub fn new_outbound<K: Deref, F: Deref>(
894 fee_estimator: &F, keys_provider: &K, counterparty_node_id: PublicKey, their_features: &InitFeatures,
895 channel_value_satoshis: u64, push_msat: u64, user_id: u64, config: &UserConfig, current_chain_height: u32,
896 outbound_scid_alias: u64
897 ) -> Result<Channel<Signer>, APIError>
898 where K::Target: KeysInterface<Signer = Signer>,
899 F::Target: FeeEstimator,
901 let opt_anchors = false; // TODO - should be based on features
903 let holder_selected_contest_delay = config.channel_handshake_config.our_to_self_delay;
904 let holder_signer = keys_provider.get_channel_signer(false, channel_value_satoshis);
905 let pubkeys = holder_signer.pubkeys().clone();
907 if !their_features.supports_wumbo() && channel_value_satoshis > MAX_FUNDING_SATOSHIS_NO_WUMBO {
908 return Err(APIError::APIMisuseError{err: format!("funding_value must not exceed {}, it was {}", MAX_FUNDING_SATOSHIS_NO_WUMBO, channel_value_satoshis)});
910 if channel_value_satoshis >= TOTAL_BITCOIN_SUPPLY_SATOSHIS {
911 return Err(APIError::APIMisuseError{err: format!("funding_value must be smaller than the total bitcoin supply, it was {}", channel_value_satoshis)});
913 let channel_value_msat = channel_value_satoshis * 1000;
914 if push_msat > channel_value_msat {
915 return Err(APIError::APIMisuseError { err: format!("Push value ({}) was larger than channel_value ({})", push_msat, channel_value_msat) });
917 if holder_selected_contest_delay < BREAKDOWN_TIMEOUT {
918 return Err(APIError::APIMisuseError {err: format!("Configured with an unreasonable our_to_self_delay ({}) putting user funds at risks", holder_selected_contest_delay)});
920 let holder_selected_channel_reserve_satoshis = Channel::<Signer>::get_holder_selected_channel_reserve_satoshis(channel_value_satoshis);
921 if holder_selected_channel_reserve_satoshis < MIN_CHAN_DUST_LIMIT_SATOSHIS {
922 return Err(APIError::APIMisuseError { err: format!("Holder selected channel reserve below implemention limit dust_limit_satoshis {}", holder_selected_channel_reserve_satoshis) });
925 let feerate = fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Normal);
927 let value_to_self_msat = channel_value_satoshis * 1000 - push_msat;
928 let commitment_tx_fee = Self::commit_tx_fee_msat(feerate, MIN_AFFORDABLE_HTLC_COUNT, opt_anchors);
929 if value_to_self_msat < commitment_tx_fee {
930 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) });
933 let mut secp_ctx = Secp256k1::new();
934 secp_ctx.seeded_randomize(&keys_provider.get_secure_random_bytes());
936 let shutdown_scriptpubkey = if config.channel_handshake_config.commit_upfront_shutdown_pubkey {
937 Some(keys_provider.get_shutdown_scriptpubkey())
940 if let Some(shutdown_scriptpubkey) = &shutdown_scriptpubkey {
941 if !shutdown_scriptpubkey.is_compatible(&their_features) {
942 return Err(APIError::IncompatibleShutdownScript { script: shutdown_scriptpubkey.clone() });
949 config: LegacyChannelConfig {
950 options: config.channel_config.clone(),
951 announced_channel: config.channel_handshake_config.announced_channel,
952 commit_upfront_shutdown_pubkey: config.channel_handshake_config.commit_upfront_shutdown_pubkey,
957 inbound_handshake_limits_override: Some(config.channel_handshake_limits.clone()),
959 channel_id: keys_provider.get_secure_random_bytes(),
960 channel_state: ChannelState::OurInitSent as u32,
961 announcement_sigs_state: AnnouncementSigsState::NotSent,
963 channel_value_satoshis,
965 latest_monitor_update_id: 0,
968 shutdown_scriptpubkey,
969 destination_script: keys_provider.get_destination_script(),
971 cur_holder_commitment_transaction_number: INITIAL_COMMITMENT_NUMBER,
972 cur_counterparty_commitment_transaction_number: INITIAL_COMMITMENT_NUMBER,
975 pending_inbound_htlcs: Vec::new(),
976 pending_outbound_htlcs: Vec::new(),
977 holding_cell_htlc_updates: Vec::new(),
978 pending_update_fee: None,
979 holding_cell_update_fee: None,
980 next_holder_htlc_id: 0,
981 next_counterparty_htlc_id: 0,
982 update_time_counter: 1,
984 resend_order: RAACommitmentOrder::CommitmentFirst,
986 monitor_pending_channel_ready: false,
987 monitor_pending_revoke_and_ack: false,
988 monitor_pending_commitment_signed: false,
989 monitor_pending_forwards: Vec::new(),
990 monitor_pending_failures: Vec::new(),
991 monitor_pending_finalized_fulfills: Vec::new(),
993 #[cfg(debug_assertions)]
994 holder_max_commitment_tx_output: Mutex::new((channel_value_satoshis * 1000 - push_msat, push_msat)),
995 #[cfg(debug_assertions)]
996 counterparty_max_commitment_tx_output: Mutex::new((channel_value_satoshis * 1000 - push_msat, push_msat)),
998 last_sent_closing_fee: None,
999 pending_counterparty_closing_signed: None,
1000 closing_fee_limits: None,
1001 target_closing_feerate_sats_per_kw: None,
1003 inbound_awaiting_accept: false,
1005 funding_tx_confirmed_in: None,
1006 funding_tx_confirmation_height: 0,
1007 short_channel_id: None,
1008 channel_creation_height: current_chain_height,
1010 feerate_per_kw: feerate,
1011 counterparty_dust_limit_satoshis: 0,
1012 holder_dust_limit_satoshis: MIN_CHAN_DUST_LIMIT_SATOSHIS,
1013 counterparty_max_htlc_value_in_flight_msat: 0,
1014 holder_max_htlc_value_in_flight_msat: Self::get_holder_max_htlc_value_in_flight_msat(channel_value_satoshis, &config.channel_handshake_config),
1015 counterparty_selected_channel_reserve_satoshis: None, // Filled in in accept_channel
1016 holder_selected_channel_reserve_satoshis,
1017 counterparty_htlc_minimum_msat: 0,
1018 holder_htlc_minimum_msat: if config.channel_handshake_config.our_htlc_minimum_msat == 0 { 1 } else { config.channel_handshake_config.our_htlc_minimum_msat },
1019 counterparty_max_accepted_htlcs: 0,
1020 minimum_depth: None, // Filled in in accept_channel
1022 counterparty_forwarding_info: None,
1024 channel_transaction_parameters: ChannelTransactionParameters {
1025 holder_pubkeys: pubkeys,
1026 holder_selected_contest_delay: config.channel_handshake_config.our_to_self_delay,
1027 is_outbound_from_holder: true,
1028 counterparty_parameters: None,
1029 funding_outpoint: None,
1030 opt_anchors: if opt_anchors { Some(()) } else { None },
1032 funding_transaction: None,
1034 counterparty_cur_commitment_point: None,
1035 counterparty_prev_commitment_point: None,
1036 counterparty_node_id,
1038 counterparty_shutdown_scriptpubkey: None,
1040 commitment_secrets: CounterpartyCommitmentSecrets::new(),
1042 channel_update_status: ChannelUpdateStatus::Enabled,
1043 closing_signed_in_flight: false,
1045 announcement_sigs: None,
1047 #[cfg(any(test, fuzzing))]
1048 next_local_commitment_tx_fee_info_cached: Mutex::new(None),
1049 #[cfg(any(test, fuzzing))]
1050 next_remote_commitment_tx_fee_info_cached: Mutex::new(None),
1052 workaround_lnd_bug_4006: None,
1054 latest_inbound_scid_alias: None,
1055 outbound_scid_alias,
1057 #[cfg(any(test, fuzzing))]
1058 historical_inbound_htlc_fulfills: HashSet::new(),
1060 channel_type: Self::get_initial_channel_type(&config),
1064 fn check_remote_fee<F: Deref>(fee_estimator: &F, feerate_per_kw: u32) -> Result<(), ChannelError>
1065 where F::Target: FeeEstimator
1067 // We only bound the fee updates on the upper side to prevent completely absurd feerates,
1068 // always accepting up to 25 sat/vByte or 10x our fee estimator's "High Priority" fee.
1069 // We generally don't care too much if they set the feerate to something very high, but it
1070 // could result in the channel being useless due to everything being dust.
1071 let upper_limit = cmp::max(250 * 25,
1072 fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::HighPriority) as u64 * 10);
1073 if feerate_per_kw as u64 > upper_limit {
1074 return Err(ChannelError::Close(format!("Peer's feerate much too high. Actual: {}. Our expected upper limit: {}", feerate_per_kw, upper_limit)));
1076 let lower_limit = fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Background);
1077 // Some fee estimators round up to the next full sat/vbyte (ie 250 sats per kw), causing
1078 // occasional issues with feerate disagreements between an initiator that wants a feerate
1079 // of 1.1 sat/vbyte and a receiver that wants 1.1 rounded up to 2. Thus, we always add 250
1080 // sat/kw before the comparison here.
1081 if feerate_per_kw + 250 < lower_limit {
1082 return Err(ChannelError::Close(format!("Peer's feerate much too low. Actual: {}. Our expected lower limit: {} (- 250)", feerate_per_kw, lower_limit)));
1087 /// Creates a new channel from a remote sides' request for one.
1088 /// Assumes chain_hash has already been checked and corresponds with what we expect!
1089 pub fn new_from_req<K: Deref, F: Deref, L: Deref>(
1090 fee_estimator: &F, keys_provider: &K, counterparty_node_id: PublicKey, their_features: &InitFeatures,
1091 msg: &msgs::OpenChannel, user_id: u64, config: &UserConfig, current_chain_height: u32, logger: &L,
1092 outbound_scid_alias: u64
1093 ) -> Result<Channel<Signer>, ChannelError>
1094 where K::Target: KeysInterface<Signer = Signer>,
1095 F::Target: FeeEstimator,
1098 let opt_anchors = false; // TODO - should be based on features
1099 let announced_channel = if (msg.channel_flags & 1) == 1 { true } else { false };
1101 // First check the channel type is known, failing before we do anything else if we don't
1102 // support this channel type.
1103 let channel_type = if let Some(channel_type) = &msg.channel_type {
1104 if channel_type.supports_any_optional_bits() {
1105 return Err(ChannelError::Close("Channel Type field contained optional bits - this is not allowed".to_owned()));
1108 if channel_type.requires_unknown_bits() {
1109 return Err(ChannelError::Close("Channel Type field contains unknown bits".to_owned()));
1112 // We currently only allow four channel types, so write it all out here - we allow
1113 // `only_static_remote_key` or `static_remote_key | zero_conf` in all contexts, and
1114 // further allow `static_remote_key | scid_privacy` or
1115 // `static_remote_key | scid_privacy | zero_conf`, if the channel is not
1116 // publicly announced.
1117 if *channel_type != ChannelTypeFeatures::only_static_remote_key() {
1118 if !channel_type.requires_scid_privacy() && !channel_type.requires_zero_conf() {
1119 return Err(ChannelError::Close("Channel Type was not understood".to_owned()));
1122 if channel_type.requires_scid_privacy() && announced_channel {
1123 return Err(ChannelError::Close("SCID Alias/Privacy Channel Type cannot be set on a public channel".to_owned()));
1126 channel_type.clone()
1128 ChannelTypeFeatures::from_counterparty_init(&their_features)
1130 if !channel_type.supports_static_remote_key() {
1131 return Err(ChannelError::Close("Channel Type was not understood - we require static remote key".to_owned()));
1134 let holder_signer = keys_provider.get_channel_signer(true, msg.funding_satoshis);
1135 let pubkeys = holder_signer.pubkeys().clone();
1136 let counterparty_pubkeys = ChannelPublicKeys {
1137 funding_pubkey: msg.funding_pubkey,
1138 revocation_basepoint: msg.revocation_basepoint,
1139 payment_point: msg.payment_point,
1140 delayed_payment_basepoint: msg.delayed_payment_basepoint,
1141 htlc_basepoint: msg.htlc_basepoint
1144 if config.channel_handshake_config.our_to_self_delay < BREAKDOWN_TIMEOUT {
1145 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)));
1148 // Check sanity of message fields:
1149 if msg.funding_satoshis > config.channel_handshake_limits.max_funding_satoshis {
1150 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)));
1152 if msg.funding_satoshis >= TOTAL_BITCOIN_SUPPLY_SATOSHIS {
1153 return Err(ChannelError::Close(format!("Funding must be smaller than the total bitcoin supply. It was {}", msg.funding_satoshis)));
1155 if msg.channel_reserve_satoshis > msg.funding_satoshis {
1156 return Err(ChannelError::Close(format!("Bogus channel_reserve_satoshis ({}). Must be not greater than funding_satoshis: {}", msg.channel_reserve_satoshis, msg.funding_satoshis)));
1158 let full_channel_value_msat = (msg.funding_satoshis - msg.channel_reserve_satoshis) * 1000;
1159 if msg.push_msat > full_channel_value_msat {
1160 return Err(ChannelError::Close(format!("push_msat {} was larger than channel amount minus reserve ({})", msg.push_msat, full_channel_value_msat)));
1162 if msg.dust_limit_satoshis > msg.funding_satoshis {
1163 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)));
1165 if msg.htlc_minimum_msat >= full_channel_value_msat {
1166 return Err(ChannelError::Close(format!("Minimum htlc value ({}) was larger than full channel value ({})", msg.htlc_minimum_msat, full_channel_value_msat)));
1168 Channel::<Signer>::check_remote_fee(fee_estimator, msg.feerate_per_kw)?;
1170 let max_counterparty_selected_contest_delay = u16::min(config.channel_handshake_limits.their_to_self_delay, MAX_LOCAL_BREAKDOWN_TIMEOUT);
1171 if msg.to_self_delay > max_counterparty_selected_contest_delay {
1172 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)));
1174 if msg.max_accepted_htlcs < 1 {
1175 return Err(ChannelError::Close("0 max_accepted_htlcs makes for a useless channel".to_owned()));
1177 if msg.max_accepted_htlcs > MAX_HTLCS {
1178 return Err(ChannelError::Close(format!("max_accepted_htlcs was {}. It must not be larger than {}", msg.max_accepted_htlcs, MAX_HTLCS)));
1181 // Now check against optional parameters as set by config...
1182 if msg.funding_satoshis < config.channel_handshake_limits.min_funding_satoshis {
1183 return Err(ChannelError::Close(format!("Funding satoshis ({}) is less than the user specified limit ({})", msg.funding_satoshis, config.channel_handshake_limits.min_funding_satoshis)));
1185 if msg.htlc_minimum_msat > config.channel_handshake_limits.max_htlc_minimum_msat {
1186 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)));
1188 if msg.max_htlc_value_in_flight_msat < config.channel_handshake_limits.min_max_htlc_value_in_flight_msat {
1189 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)));
1191 if msg.channel_reserve_satoshis > config.channel_handshake_limits.max_channel_reserve_satoshis {
1192 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)));
1194 if msg.max_accepted_htlcs < config.channel_handshake_limits.min_max_accepted_htlcs {
1195 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)));
1197 if msg.dust_limit_satoshis < MIN_CHAN_DUST_LIMIT_SATOSHIS {
1198 return Err(ChannelError::Close(format!("dust_limit_satoshis ({}) is less than the implementation limit ({})", msg.dust_limit_satoshis, MIN_CHAN_DUST_LIMIT_SATOSHIS)));
1200 if msg.dust_limit_satoshis > MAX_CHAN_DUST_LIMIT_SATOSHIS {
1201 return Err(ChannelError::Close(format!("dust_limit_satoshis ({}) is greater than the implementation limit ({})", msg.dust_limit_satoshis, MAX_CHAN_DUST_LIMIT_SATOSHIS)));
1204 // Convert things into internal flags and prep our state:
1206 if config.channel_handshake_limits.force_announced_channel_preference {
1207 if config.channel_handshake_config.announced_channel != announced_channel {
1208 return Err(ChannelError::Close("Peer tried to open channel but their announcement preference is different from ours".to_owned()));
1212 let holder_selected_channel_reserve_satoshis = Channel::<Signer>::get_holder_selected_channel_reserve_satoshis(msg.funding_satoshis);
1213 if holder_selected_channel_reserve_satoshis < MIN_CHAN_DUST_LIMIT_SATOSHIS {
1214 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)));
1216 if holder_selected_channel_reserve_satoshis * 1000 >= full_channel_value_msat {
1217 return Err(ChannelError::Close(format!("Suitable channel reserve not found. remote_channel_reserve was ({}). Channel value is ({} - {}).", holder_selected_channel_reserve_satoshis, full_channel_value_msat, msg.push_msat)));
1219 if msg.channel_reserve_satoshis < MIN_CHAN_DUST_LIMIT_SATOSHIS {
1220 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.",
1221 msg.channel_reserve_satoshis, MIN_CHAN_DUST_LIMIT_SATOSHIS);
1223 if holder_selected_channel_reserve_satoshis < msg.dust_limit_satoshis {
1224 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)));
1227 // check if the funder's amount for the initial commitment tx is sufficient
1228 // for full fee payment plus a few HTLCs to ensure the channel will be useful.
1229 let funders_amount_msat = msg.funding_satoshis * 1000 - msg.push_msat;
1230 let commitment_tx_fee = Self::commit_tx_fee_msat(msg.feerate_per_kw, MIN_AFFORDABLE_HTLC_COUNT, opt_anchors) / 1000;
1231 if funders_amount_msat / 1000 < commitment_tx_fee {
1232 return Err(ChannelError::Close(format!("Funding amount ({} sats) can't even pay fee for initial commitment transaction fee of {} sats.", funders_amount_msat / 1000, commitment_tx_fee)));
1235 let to_remote_satoshis = funders_amount_msat / 1000 - commitment_tx_fee;
1236 // While it's reasonable for us to not meet the channel reserve initially (if they don't
1237 // want to push much to us), our counterparty should always have more than our reserve.
1238 if to_remote_satoshis < holder_selected_channel_reserve_satoshis {
1239 return Err(ChannelError::Close("Insufficient funding amount for initial reserve".to_owned()));
1242 let counterparty_shutdown_scriptpubkey = if their_features.supports_upfront_shutdown_script() {
1243 match &msg.shutdown_scriptpubkey {
1244 &OptionalField::Present(ref script) => {
1245 // Peer is signaling upfront_shutdown and has opt-out with a 0-length script. We don't enforce anything
1246 if script.len() == 0 {
1249 if !script::is_bolt2_compliant(&script, their_features) {
1250 return Err(ChannelError::Close(format!("Peer is signaling upfront_shutdown but has provided an unacceptable scriptpubkey format: {}", script)))
1252 Some(script.clone())
1255 // 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
1256 &OptionalField::Absent => {
1257 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()));
1262 let shutdown_scriptpubkey = if config.channel_handshake_config.commit_upfront_shutdown_pubkey {
1263 Some(keys_provider.get_shutdown_scriptpubkey())
1266 if let Some(shutdown_scriptpubkey) = &shutdown_scriptpubkey {
1267 if !shutdown_scriptpubkey.is_compatible(&their_features) {
1268 return Err(ChannelError::Close(format!("Provided a scriptpubkey format not accepted by peer: {}", shutdown_scriptpubkey)));
1272 let mut secp_ctx = Secp256k1::new();
1273 secp_ctx.seeded_randomize(&keys_provider.get_secure_random_bytes());
1275 let chan = Channel {
1278 config: LegacyChannelConfig {
1279 options: config.channel_config.clone(),
1281 commit_upfront_shutdown_pubkey: config.channel_handshake_config.commit_upfront_shutdown_pubkey,
1286 inbound_handshake_limits_override: None,
1288 channel_id: msg.temporary_channel_id,
1289 channel_state: (ChannelState::OurInitSent as u32) | (ChannelState::TheirInitSent as u32),
1290 announcement_sigs_state: AnnouncementSigsState::NotSent,
1293 latest_monitor_update_id: 0,
1296 shutdown_scriptpubkey,
1297 destination_script: keys_provider.get_destination_script(),
1299 cur_holder_commitment_transaction_number: INITIAL_COMMITMENT_NUMBER,
1300 cur_counterparty_commitment_transaction_number: INITIAL_COMMITMENT_NUMBER,
1301 value_to_self_msat: msg.push_msat,
1303 pending_inbound_htlcs: Vec::new(),
1304 pending_outbound_htlcs: Vec::new(),
1305 holding_cell_htlc_updates: Vec::new(),
1306 pending_update_fee: None,
1307 holding_cell_update_fee: None,
1308 next_holder_htlc_id: 0,
1309 next_counterparty_htlc_id: 0,
1310 update_time_counter: 1,
1312 resend_order: RAACommitmentOrder::CommitmentFirst,
1314 monitor_pending_channel_ready: false,
1315 monitor_pending_revoke_and_ack: false,
1316 monitor_pending_commitment_signed: false,
1317 monitor_pending_forwards: Vec::new(),
1318 monitor_pending_failures: Vec::new(),
1319 monitor_pending_finalized_fulfills: Vec::new(),
1321 #[cfg(debug_assertions)]
1322 holder_max_commitment_tx_output: Mutex::new((msg.push_msat, msg.funding_satoshis * 1000 - msg.push_msat)),
1323 #[cfg(debug_assertions)]
1324 counterparty_max_commitment_tx_output: Mutex::new((msg.push_msat, msg.funding_satoshis * 1000 - msg.push_msat)),
1326 last_sent_closing_fee: None,
1327 pending_counterparty_closing_signed: None,
1328 closing_fee_limits: None,
1329 target_closing_feerate_sats_per_kw: None,
1331 inbound_awaiting_accept: true,
1333 funding_tx_confirmed_in: None,
1334 funding_tx_confirmation_height: 0,
1335 short_channel_id: None,
1336 channel_creation_height: current_chain_height,
1338 feerate_per_kw: msg.feerate_per_kw,
1339 channel_value_satoshis: msg.funding_satoshis,
1340 counterparty_dust_limit_satoshis: msg.dust_limit_satoshis,
1341 holder_dust_limit_satoshis: MIN_CHAN_DUST_LIMIT_SATOSHIS,
1342 counterparty_max_htlc_value_in_flight_msat: cmp::min(msg.max_htlc_value_in_flight_msat, msg.funding_satoshis * 1000),
1343 holder_max_htlc_value_in_flight_msat: Self::get_holder_max_htlc_value_in_flight_msat(msg.funding_satoshis, &config.channel_handshake_config),
1344 counterparty_selected_channel_reserve_satoshis: Some(msg.channel_reserve_satoshis),
1345 holder_selected_channel_reserve_satoshis,
1346 counterparty_htlc_minimum_msat: msg.htlc_minimum_msat,
1347 holder_htlc_minimum_msat: if config.channel_handshake_config.our_htlc_minimum_msat == 0 { 1 } else { config.channel_handshake_config.our_htlc_minimum_msat },
1348 counterparty_max_accepted_htlcs: msg.max_accepted_htlcs,
1349 minimum_depth: Some(cmp::max(config.channel_handshake_config.minimum_depth, 1)),
1351 counterparty_forwarding_info: None,
1353 channel_transaction_parameters: ChannelTransactionParameters {
1354 holder_pubkeys: pubkeys,
1355 holder_selected_contest_delay: config.channel_handshake_config.our_to_self_delay,
1356 is_outbound_from_holder: false,
1357 counterparty_parameters: Some(CounterpartyChannelTransactionParameters {
1358 selected_contest_delay: msg.to_self_delay,
1359 pubkeys: counterparty_pubkeys,
1361 funding_outpoint: None,
1362 opt_anchors: if opt_anchors { Some(()) } else { None },
1364 funding_transaction: None,
1366 counterparty_cur_commitment_point: Some(msg.first_per_commitment_point),
1367 counterparty_prev_commitment_point: None,
1368 counterparty_node_id,
1370 counterparty_shutdown_scriptpubkey,
1372 commitment_secrets: CounterpartyCommitmentSecrets::new(),
1374 channel_update_status: ChannelUpdateStatus::Enabled,
1375 closing_signed_in_flight: false,
1377 announcement_sigs: None,
1379 #[cfg(any(test, fuzzing))]
1380 next_local_commitment_tx_fee_info_cached: Mutex::new(None),
1381 #[cfg(any(test, fuzzing))]
1382 next_remote_commitment_tx_fee_info_cached: Mutex::new(None),
1384 workaround_lnd_bug_4006: None,
1386 latest_inbound_scid_alias: None,
1387 outbound_scid_alias,
1389 #[cfg(any(test, fuzzing))]
1390 historical_inbound_htlc_fulfills: HashSet::new(),
1398 /// Transaction nomenclature is somewhat confusing here as there are many different cases - a
1399 /// transaction is referred to as "a's transaction" implying that a will be able to broadcast
1400 /// the transaction. Thus, b will generally be sending a signature over such a transaction to
1401 /// a, and a can revoke the transaction by providing b the relevant per_commitment_secret. As
1402 /// such, a transaction is generally the result of b increasing the amount paid to a (or adding
1404 /// @local is used only to convert relevant internal structures which refer to remote vs local
1405 /// to decide value of outputs and direction of HTLCs.
1406 /// @generated_by_local is used to determine *which* HTLCs to include - noting that the HTLC
1407 /// state may indicate that one peer has informed the other that they'd like to add an HTLC but
1408 /// have not yet committed it. Such HTLCs will only be included in transactions which are being
1409 /// generated by the peer which proposed adding the HTLCs, and thus we need to understand both
1410 /// which peer generated this transaction and "to whom" this transaction flows.
1412 fn build_commitment_transaction<L: Deref>(&self, commitment_number: u64, keys: &TxCreationKeys, local: bool, generated_by_local: bool, logger: &L) -> CommitmentStats
1413 where L::Target: Logger
1415 let mut included_dust_htlcs: Vec<(HTLCOutputInCommitment, Option<&HTLCSource>)> = Vec::new();
1416 let num_htlcs = self.pending_inbound_htlcs.len() + self.pending_outbound_htlcs.len();
1417 let mut included_non_dust_htlcs: Vec<(HTLCOutputInCommitment, Option<&HTLCSource>)> = Vec::with_capacity(num_htlcs);
1419 let broadcaster_dust_limit_satoshis = if local { self.holder_dust_limit_satoshis } else { self.counterparty_dust_limit_satoshis };
1420 let mut remote_htlc_total_msat = 0;
1421 let mut local_htlc_total_msat = 0;
1422 let mut value_to_self_msat_offset = 0;
1424 let mut feerate_per_kw = self.feerate_per_kw;
1425 if let Some((feerate, update_state)) = self.pending_update_fee {
1426 if match update_state {
1427 // Note that these match the inclusion criteria when scanning
1428 // pending_inbound_htlcs below.
1429 FeeUpdateState::RemoteAnnounced => { debug_assert!(!self.is_outbound()); !generated_by_local },
1430 FeeUpdateState::AwaitingRemoteRevokeToAnnounce => { debug_assert!(!self.is_outbound()); !generated_by_local },
1431 FeeUpdateState::Outbound => { assert!(self.is_outbound()); generated_by_local },
1433 feerate_per_kw = feerate;
1437 log_trace!(logger, "Building commitment transaction number {} (really {} xor {}) for channel {} for {}, generated by {} with fee {}...",
1438 commitment_number, (INITIAL_COMMITMENT_NUMBER - commitment_number),
1439 get_commitment_transaction_number_obscure_factor(&self.get_holder_pubkeys().payment_point, &self.get_counterparty_pubkeys().payment_point, self.is_outbound()),
1440 log_bytes!(self.channel_id), if local { "us" } else { "remote" }, if generated_by_local { "us" } else { "remote" }, feerate_per_kw);
1442 macro_rules! get_htlc_in_commitment {
1443 ($htlc: expr, $offered: expr) => {
1444 HTLCOutputInCommitment {
1446 amount_msat: $htlc.amount_msat,
1447 cltv_expiry: $htlc.cltv_expiry,
1448 payment_hash: $htlc.payment_hash,
1449 transaction_output_index: None
1454 macro_rules! add_htlc_output {
1455 ($htlc: expr, $outbound: expr, $source: expr, $state_name: expr) => {
1456 if $outbound == local { // "offered HTLC output"
1457 let htlc_in_tx = get_htlc_in_commitment!($htlc, true);
1458 if $htlc.amount_msat / 1000 >= broadcaster_dust_limit_satoshis + (feerate_per_kw as u64 * htlc_timeout_tx_weight(self.opt_anchors()) / 1000) {
1459 log_trace!(logger, " ...including {} {} HTLC {} (hash {}) with value {}", if $outbound { "outbound" } else { "inbound" }, $state_name, $htlc.htlc_id, log_bytes!($htlc.payment_hash.0), $htlc.amount_msat);
1460 included_non_dust_htlcs.push((htlc_in_tx, $source));
1462 log_trace!(logger, " ...including {} {} dust HTLC {} (hash {}) with value {} due to dust limit", if $outbound { "outbound" } else { "inbound" }, $state_name, $htlc.htlc_id, log_bytes!($htlc.payment_hash.0), $htlc.amount_msat);
1463 included_dust_htlcs.push((htlc_in_tx, $source));
1466 let htlc_in_tx = get_htlc_in_commitment!($htlc, false);
1467 if $htlc.amount_msat / 1000 >= broadcaster_dust_limit_satoshis + (feerate_per_kw as u64 * htlc_success_tx_weight(self.opt_anchors()) / 1000) {
1468 log_trace!(logger, " ...including {} {} HTLC {} (hash {}) with value {}", if $outbound { "outbound" } else { "inbound" }, $state_name, $htlc.htlc_id, log_bytes!($htlc.payment_hash.0), $htlc.amount_msat);
1469 included_non_dust_htlcs.push((htlc_in_tx, $source));
1471 log_trace!(logger, " ...including {} {} dust HTLC {} (hash {}) with value {}", if $outbound { "outbound" } else { "inbound" }, $state_name, $htlc.htlc_id, log_bytes!($htlc.payment_hash.0), $htlc.amount_msat);
1472 included_dust_htlcs.push((htlc_in_tx, $source));
1478 for ref htlc in self.pending_inbound_htlcs.iter() {
1479 let (include, state_name) = match htlc.state {
1480 InboundHTLCState::RemoteAnnounced(_) => (!generated_by_local, "RemoteAnnounced"),
1481 InboundHTLCState::AwaitingRemoteRevokeToAnnounce(_) => (!generated_by_local, "AwaitingRemoteRevokeToAnnounce"),
1482 InboundHTLCState::AwaitingAnnouncedRemoteRevoke(_) => (true, "AwaitingAnnouncedRemoteRevoke"),
1483 InboundHTLCState::Committed => (true, "Committed"),
1484 InboundHTLCState::LocalRemoved(_) => (!generated_by_local, "LocalRemoved"),
1488 add_htlc_output!(htlc, false, None, state_name);
1489 remote_htlc_total_msat += htlc.amount_msat;
1491 log_trace!(logger, " ...not including inbound HTLC {} (hash {}) with value {} due to state ({})", htlc.htlc_id, log_bytes!(htlc.payment_hash.0), htlc.amount_msat, state_name);
1493 &InboundHTLCState::LocalRemoved(ref reason) => {
1494 if generated_by_local {
1495 if let &InboundHTLCRemovalReason::Fulfill(_) = reason {
1496 value_to_self_msat_offset += htlc.amount_msat as i64;
1505 let mut preimages: Vec<PaymentPreimage> = Vec::new();
1507 for ref htlc in self.pending_outbound_htlcs.iter() {
1508 let (include, state_name) = match htlc.state {
1509 OutboundHTLCState::LocalAnnounced(_) => (generated_by_local, "LocalAnnounced"),
1510 OutboundHTLCState::Committed => (true, "Committed"),
1511 OutboundHTLCState::RemoteRemoved(_) => (generated_by_local, "RemoteRemoved"),
1512 OutboundHTLCState::AwaitingRemoteRevokeToRemove(_) => (generated_by_local, "AwaitingRemoteRevokeToRemove"),
1513 OutboundHTLCState::AwaitingRemovedRemoteRevoke(_) => (false, "AwaitingRemovedRemoteRevoke"),
1516 let preimage_opt = match htlc.state {
1517 OutboundHTLCState::RemoteRemoved(OutboundHTLCOutcome::Success(p)) => p,
1518 OutboundHTLCState::AwaitingRemoteRevokeToRemove(OutboundHTLCOutcome::Success(p)) => p,
1519 OutboundHTLCState::AwaitingRemovedRemoteRevoke(OutboundHTLCOutcome::Success(p)) => p,
1523 if let Some(preimage) = preimage_opt {
1524 preimages.push(preimage);
1528 add_htlc_output!(htlc, true, Some(&htlc.source), state_name);
1529 local_htlc_total_msat += htlc.amount_msat;
1531 log_trace!(logger, " ...not including outbound HTLC {} (hash {}) with value {} due to state ({})", htlc.htlc_id, log_bytes!(htlc.payment_hash.0), htlc.amount_msat, state_name);
1533 OutboundHTLCState::AwaitingRemoteRevokeToRemove(OutboundHTLCOutcome::Success(_))|OutboundHTLCState::AwaitingRemovedRemoteRevoke(OutboundHTLCOutcome::Success(_)) => {
1534 value_to_self_msat_offset -= htlc.amount_msat as i64;
1536 OutboundHTLCState::RemoteRemoved(OutboundHTLCOutcome::Success(_)) => {
1537 if !generated_by_local {
1538 value_to_self_msat_offset -= htlc.amount_msat as i64;
1546 let mut value_to_self_msat: i64 = (self.value_to_self_msat - local_htlc_total_msat) as i64 + value_to_self_msat_offset;
1547 assert!(value_to_self_msat >= 0);
1548 // Note that in case they have several just-awaiting-last-RAA fulfills in-progress (ie
1549 // AwaitingRemoteRevokeToRemove or AwaitingRemovedRemoteRevoke) we may have allowed them to
1550 // "violate" their reserve value by couting those against it. Thus, we have to convert
1551 // everything to i64 before subtracting as otherwise we can overflow.
1552 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;
1553 assert!(value_to_remote_msat >= 0);
1555 #[cfg(debug_assertions)]
1557 // Make sure that the to_self/to_remote is always either past the appropriate
1558 // channel_reserve *or* it is making progress towards it.
1559 let mut broadcaster_max_commitment_tx_output = if generated_by_local {
1560 self.holder_max_commitment_tx_output.lock().unwrap()
1562 self.counterparty_max_commitment_tx_output.lock().unwrap()
1564 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);
1565 broadcaster_max_commitment_tx_output.0 = cmp::max(broadcaster_max_commitment_tx_output.0, value_to_self_msat as u64);
1566 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);
1567 broadcaster_max_commitment_tx_output.1 = cmp::max(broadcaster_max_commitment_tx_output.1, value_to_remote_msat as u64);
1570 let total_fee_sat = Channel::<Signer>::commit_tx_fee_sat(feerate_per_kw, included_non_dust_htlcs.len(), self.channel_transaction_parameters.opt_anchors.is_some());
1571 let anchors_val = if self.channel_transaction_parameters.opt_anchors.is_some() { ANCHOR_OUTPUT_VALUE_SATOSHI * 2 } else { 0 } as i64;
1572 let (value_to_self, value_to_remote) = if self.is_outbound() {
1573 (value_to_self_msat / 1000 - anchors_val - total_fee_sat as i64, value_to_remote_msat / 1000)
1575 (value_to_self_msat / 1000, value_to_remote_msat / 1000 - anchors_val - total_fee_sat as i64)
1578 let mut value_to_a = if local { value_to_self } else { value_to_remote };
1579 let mut value_to_b = if local { value_to_remote } else { value_to_self };
1580 let (funding_pubkey_a, funding_pubkey_b) = if local {
1581 (self.get_holder_pubkeys().funding_pubkey, self.get_counterparty_pubkeys().funding_pubkey)
1583 (self.get_counterparty_pubkeys().funding_pubkey, self.get_holder_pubkeys().funding_pubkey)
1586 if value_to_a >= (broadcaster_dust_limit_satoshis as i64) {
1587 log_trace!(logger, " ...including {} output with value {}", if local { "to_local" } else { "to_remote" }, value_to_a);
1592 if value_to_b >= (broadcaster_dust_limit_satoshis as i64) {
1593 log_trace!(logger, " ...including {} output with value {}", if local { "to_remote" } else { "to_local" }, value_to_b);
1598 let num_nondust_htlcs = included_non_dust_htlcs.len();
1600 let channel_parameters =
1601 if local { self.channel_transaction_parameters.as_holder_broadcastable() }
1602 else { self.channel_transaction_parameters.as_counterparty_broadcastable() };
1603 let tx = CommitmentTransaction::new_with_auxiliary_htlc_data(commitment_number,
1606 self.channel_transaction_parameters.opt_anchors.is_some(),
1611 &mut included_non_dust_htlcs,
1614 let mut htlcs_included = included_non_dust_htlcs;
1615 // The unwrap is safe, because all non-dust HTLCs have been assigned an output index
1616 htlcs_included.sort_unstable_by_key(|h| h.0.transaction_output_index.unwrap());
1617 htlcs_included.append(&mut included_dust_htlcs);
1619 // For the stats, trimmed-to-0 the value in msats accordingly
1620 value_to_self_msat = if (value_to_self_msat * 1000) < broadcaster_dust_limit_satoshis as i64 { 0 } else { value_to_self_msat };
1621 value_to_remote_msat = if (value_to_remote_msat * 1000) < broadcaster_dust_limit_satoshis as i64 { 0 } else { value_to_remote_msat };
1629 local_balance_msat: value_to_self_msat as u64,
1630 remote_balance_msat: value_to_remote_msat as u64,
1636 fn get_closing_scriptpubkey(&self) -> Script {
1637 // The shutdown scriptpubkey is set on channel opening when option_upfront_shutdown_script
1638 // is signaled. Otherwise, it is set when sending a shutdown message. Calling this method
1639 // outside of those situations will fail.
1640 self.shutdown_scriptpubkey.clone().unwrap().into_inner()
1644 fn get_closing_transaction_weight(&self, a_scriptpubkey: Option<&Script>, b_scriptpubkey: Option<&Script>) -> u64 {
1649 1 + // script length (0)
1653 )*4 + // * 4 for non-witness parts
1654 2 + // witness marker and flag
1655 1 + // witness element count
1656 4 + // 4 element lengths (2 sigs, multisig dummy, and witness script)
1657 self.get_funding_redeemscript().len() as u64 + // funding witness script
1658 2*(1 + 71); // two signatures + sighash type flags
1659 if let Some(spk) = a_scriptpubkey {
1660 ret += ((8+1) + // output values and script length
1661 spk.len() as u64) * 4; // scriptpubkey and witness multiplier
1663 if let Some(spk) = b_scriptpubkey {
1664 ret += ((8+1) + // output values and script length
1665 spk.len() as u64) * 4; // scriptpubkey and witness multiplier
1671 fn build_closing_transaction(&self, proposed_total_fee_satoshis: u64, skip_remote_output: bool) -> (ClosingTransaction, u64) {
1672 assert!(self.pending_inbound_htlcs.is_empty());
1673 assert!(self.pending_outbound_htlcs.is_empty());
1674 assert!(self.pending_update_fee.is_none());
1676 let mut total_fee_satoshis = proposed_total_fee_satoshis;
1677 let mut value_to_holder: i64 = (self.value_to_self_msat as i64) / 1000 - if self.is_outbound() { total_fee_satoshis as i64 } else { 0 };
1678 let mut value_to_counterparty: i64 = ((self.channel_value_satoshis * 1000 - self.value_to_self_msat) as i64 / 1000) - if self.is_outbound() { 0 } else { total_fee_satoshis as i64 };
1680 if value_to_holder < 0 {
1681 assert!(self.is_outbound());
1682 total_fee_satoshis += (-value_to_holder) as u64;
1683 } else if value_to_counterparty < 0 {
1684 assert!(!self.is_outbound());
1685 total_fee_satoshis += (-value_to_counterparty) as u64;
1688 if skip_remote_output || value_to_counterparty as u64 <= self.holder_dust_limit_satoshis {
1689 value_to_counterparty = 0;
1692 if value_to_holder as u64 <= self.holder_dust_limit_satoshis {
1693 value_to_holder = 0;
1696 assert!(self.shutdown_scriptpubkey.is_some());
1697 let holder_shutdown_script = self.get_closing_scriptpubkey();
1698 let counterparty_shutdown_script = self.counterparty_shutdown_scriptpubkey.clone().unwrap();
1699 let funding_outpoint = self.funding_outpoint().into_bitcoin_outpoint();
1701 let closing_transaction = ClosingTransaction::new(value_to_holder as u64, value_to_counterparty as u64, holder_shutdown_script, counterparty_shutdown_script, funding_outpoint);
1702 (closing_transaction, total_fee_satoshis)
1705 fn funding_outpoint(&self) -> OutPoint {
1706 self.channel_transaction_parameters.funding_outpoint.unwrap()
1710 /// Creates a set of keys for build_commitment_transaction to generate a transaction which our
1711 /// counterparty will sign (ie DO NOT send signatures over a transaction created by this to
1712 /// our counterparty!)
1713 /// The result is a transaction which we can revoke broadcastership of (ie a "local" transaction)
1714 /// TODO Some magic rust shit to compile-time check this?
1715 fn build_holder_transaction_keys(&self, commitment_number: u64) -> Result<TxCreationKeys, ChannelError> {
1716 let per_commitment_point = self.holder_signer.get_per_commitment_point(commitment_number, &self.secp_ctx);
1717 let delayed_payment_base = &self.get_holder_pubkeys().delayed_payment_basepoint;
1718 let htlc_basepoint = &self.get_holder_pubkeys().htlc_basepoint;
1719 let counterparty_pubkeys = self.get_counterparty_pubkeys();
1721 Ok(secp_check!(TxCreationKeys::derive_new(&self.secp_ctx, &per_commitment_point, delayed_payment_base, htlc_basepoint, &counterparty_pubkeys.revocation_basepoint, &counterparty_pubkeys.htlc_basepoint), "Local tx keys generation got bogus keys".to_owned()))
1725 /// Creates a set of keys for build_commitment_transaction to generate a transaction which we
1726 /// will sign and send to our counterparty.
1727 /// If an Err is returned, it is a ChannelError::Close (for get_outbound_funding_created)
1728 fn build_remote_transaction_keys(&self) -> Result<TxCreationKeys, ChannelError> {
1729 //TODO: Ensure that the payment_key derived here ends up in the library users' wallet as we
1730 //may see payments to it!
1731 let revocation_basepoint = &self.get_holder_pubkeys().revocation_basepoint;
1732 let htlc_basepoint = &self.get_holder_pubkeys().htlc_basepoint;
1733 let counterparty_pubkeys = self.get_counterparty_pubkeys();
1735 Ok(secp_check!(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), "Remote tx keys generation got bogus keys".to_owned()))
1738 /// Gets the redeemscript for the funding transaction output (ie the funding transaction output
1739 /// pays to get_funding_redeemscript().to_v0_p2wsh()).
1740 /// Panics if called before accept_channel/new_from_req
1741 pub fn get_funding_redeemscript(&self) -> Script {
1742 make_funding_redeemscript(&self.get_holder_pubkeys().funding_pubkey, self.counterparty_funding_pubkey())
1745 /// Claims an HTLC while we're disconnected from a peer, dropping the [`ChannelMonitorUpdate`]
1748 /// The [`ChannelMonitor`] for this channel MUST be updated out-of-band with the preimage
1749 /// provided (i.e. without calling [`crate::chain::Watch::update_channel`]).
1751 /// The HTLC claim will end up in the holding cell (because the caller must ensure the peer is
1753 pub fn claim_htlc_while_disconnected_dropping_mon_update<L: Deref>
1754 (&mut self, htlc_id_arg: u64, payment_preimage_arg: PaymentPreimage, logger: &L)
1755 where L::Target: Logger {
1756 // Assert that we'll add the HTLC claim to the holding cell in `get_update_fulfill_htlc`
1757 // (see equivalent if condition there).
1758 assert!(self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32 | ChannelState::PeerDisconnected as u32 | ChannelState::MonitorUpdateFailed as u32) != 0);
1759 let mon_update_id = self.latest_monitor_update_id; // Forget the ChannelMonitor update
1760 let fulfill_resp = self.get_update_fulfill_htlc(htlc_id_arg, payment_preimage_arg, logger);
1761 self.latest_monitor_update_id = mon_update_id;
1762 if let UpdateFulfillFetch::NewClaim { msg, .. } = fulfill_resp {
1763 assert!(msg.is_none()); // The HTLC must have ended up in the holding cell.
1767 fn get_update_fulfill_htlc<L: Deref>(&mut self, htlc_id_arg: u64, payment_preimage_arg: PaymentPreimage, logger: &L) -> UpdateFulfillFetch where L::Target: Logger {
1768 // Either ChannelFunded got set (which means it won't be unset) or there is no way any
1769 // caller thought we could have something claimed (cause we wouldn't have accepted in an
1770 // incoming HTLC anyway). If we got to ShutdownComplete, callers aren't allowed to call us,
1772 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
1773 panic!("Was asked to fulfill an HTLC when channel was not in an operational state");
1775 assert_eq!(self.channel_state & ChannelState::ShutdownComplete as u32, 0);
1777 let payment_hash_calc = PaymentHash(Sha256::hash(&payment_preimage_arg.0[..]).into_inner());
1779 // ChannelManager may generate duplicate claims/fails due to HTLC update events from
1780 // on-chain ChannelsMonitors during block rescan. Ideally we'd figure out a way to drop
1781 // these, but for now we just have to treat them as normal.
1783 let mut pending_idx = core::usize::MAX;
1784 let mut htlc_value_msat = 0;
1785 for (idx, htlc) in self.pending_inbound_htlcs.iter().enumerate() {
1786 if htlc.htlc_id == htlc_id_arg {
1787 assert_eq!(htlc.payment_hash, payment_hash_calc);
1789 InboundHTLCState::Committed => {},
1790 InboundHTLCState::LocalRemoved(ref reason) => {
1791 if let &InboundHTLCRemovalReason::Fulfill(_) = reason {
1793 log_warn!(logger, "Have preimage and want to fulfill HTLC with payment hash {} we already failed against channel {}", log_bytes!(htlc.payment_hash.0), log_bytes!(self.channel_id()));
1794 debug_assert!(false, "Tried to fulfill an HTLC that was already failed");
1796 return UpdateFulfillFetch::DuplicateClaim {};
1799 debug_assert!(false, "Have an inbound HTLC we tried to claim before it was fully committed to");
1800 // Don't return in release mode here so that we can update channel_monitor
1804 htlc_value_msat = htlc.amount_msat;
1808 if pending_idx == core::usize::MAX {
1809 #[cfg(any(test, fuzzing))]
1810 // If we failed to find an HTLC to fulfill, make sure it was previously fulfilled and
1811 // this is simply a duplicate claim, not previously failed and we lost funds.
1812 debug_assert!(self.historical_inbound_htlc_fulfills.contains(&htlc_id_arg));
1813 return UpdateFulfillFetch::DuplicateClaim {};
1816 // Now update local state:
1818 // We have to put the payment_preimage in the channel_monitor right away here to ensure we
1819 // can claim it even if the channel hits the chain before we see their next commitment.
1820 self.latest_monitor_update_id += 1;
1821 let monitor_update = ChannelMonitorUpdate {
1822 update_id: self.latest_monitor_update_id,
1823 updates: vec![ChannelMonitorUpdateStep::PaymentPreimage {
1824 payment_preimage: payment_preimage_arg.clone(),
1828 if (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32 | ChannelState::PeerDisconnected as u32 | ChannelState::MonitorUpdateFailed as u32)) != 0 {
1829 // Note that this condition is the same as the assertion in
1830 // `claim_htlc_while_disconnected_dropping_mon_update` and must match exactly -
1831 // `claim_htlc_while_disconnected_dropping_mon_update` would not work correctly if we
1832 // do not not get into this branch.
1833 for pending_update in self.holding_cell_htlc_updates.iter() {
1834 match pending_update {
1835 &HTLCUpdateAwaitingACK::ClaimHTLC { htlc_id, .. } => {
1836 if htlc_id_arg == htlc_id {
1837 // Make sure we don't leave latest_monitor_update_id incremented here:
1838 self.latest_monitor_update_id -= 1;
1839 #[cfg(any(test, fuzzing))]
1840 debug_assert!(self.historical_inbound_htlc_fulfills.contains(&htlc_id_arg));
1841 return UpdateFulfillFetch::DuplicateClaim {};
1844 &HTLCUpdateAwaitingACK::FailHTLC { htlc_id, .. } => {
1845 if htlc_id_arg == htlc_id {
1846 log_warn!(logger, "Have preimage and want to fulfill HTLC with pending failure against channel {}", log_bytes!(self.channel_id()));
1847 // TODO: We may actually be able to switch to a fulfill here, though its
1848 // rare enough it may not be worth the complexity burden.
1849 debug_assert!(false, "Tried to fulfill an HTLC that was already failed");
1850 return UpdateFulfillFetch::NewClaim { monitor_update, htlc_value_msat, msg: None };
1856 log_trace!(logger, "Adding HTLC claim to holding_cell in channel {}! Current state: {}", log_bytes!(self.channel_id()), self.channel_state);
1857 self.holding_cell_htlc_updates.push(HTLCUpdateAwaitingACK::ClaimHTLC {
1858 payment_preimage: payment_preimage_arg, htlc_id: htlc_id_arg,
1860 #[cfg(any(test, fuzzing))]
1861 self.historical_inbound_htlc_fulfills.insert(htlc_id_arg);
1862 return UpdateFulfillFetch::NewClaim { monitor_update, htlc_value_msat, msg: None };
1864 #[cfg(any(test, fuzzing))]
1865 self.historical_inbound_htlc_fulfills.insert(htlc_id_arg);
1868 let htlc = &mut self.pending_inbound_htlcs[pending_idx];
1869 if let InboundHTLCState::Committed = htlc.state {
1871 debug_assert!(false, "Have an inbound HTLC we tried to claim before it was fully committed to");
1872 return UpdateFulfillFetch::NewClaim { monitor_update, htlc_value_msat, msg: None };
1874 log_trace!(logger, "Upgrading HTLC {} to LocalRemoved with a Fulfill in channel {}!", log_bytes!(htlc.payment_hash.0), log_bytes!(self.channel_id));
1875 htlc.state = InboundHTLCState::LocalRemoved(InboundHTLCRemovalReason::Fulfill(payment_preimage_arg.clone()));
1878 UpdateFulfillFetch::NewClaim {
1881 msg: Some(msgs::UpdateFulfillHTLC {
1882 channel_id: self.channel_id(),
1883 htlc_id: htlc_id_arg,
1884 payment_preimage: payment_preimage_arg,
1889 pub fn get_update_fulfill_htlc_and_commit<L: Deref>(&mut self, htlc_id: u64, payment_preimage: PaymentPreimage, logger: &L) -> Result<UpdateFulfillCommitFetch, (ChannelError, ChannelMonitorUpdate)> where L::Target: Logger {
1890 match self.get_update_fulfill_htlc(htlc_id, payment_preimage, logger) {
1891 UpdateFulfillFetch::NewClaim { mut monitor_update, htlc_value_msat, msg: Some(update_fulfill_htlc) } => {
1892 let (commitment, mut additional_update) = match self.send_commitment_no_status_check(logger) {
1893 Err(e) => return Err((e, monitor_update)),
1896 // send_commitment_no_status_check may bump latest_monitor_id but we want them to be
1897 // strictly increasing by one, so decrement it here.
1898 self.latest_monitor_update_id = monitor_update.update_id;
1899 monitor_update.updates.append(&mut additional_update.updates);
1900 Ok(UpdateFulfillCommitFetch::NewClaim { monitor_update, htlc_value_msat, msgs: Some((update_fulfill_htlc, commitment)) })
1902 UpdateFulfillFetch::NewClaim { monitor_update, htlc_value_msat, msg: None } =>
1903 Ok(UpdateFulfillCommitFetch::NewClaim { monitor_update, htlc_value_msat, msgs: None }),
1904 UpdateFulfillFetch::DuplicateClaim {} => Ok(UpdateFulfillCommitFetch::DuplicateClaim {}),
1908 /// We can only have one resolution per HTLC. In some cases around reconnect, we may fulfill
1909 /// an HTLC more than once or fulfill once and then attempt to fail after reconnect. We cannot,
1910 /// however, fail more than once as we wait for an upstream failure to be irrevocably committed
1911 /// before we fail backwards.
1912 /// If we do fail twice, we debug_assert!(false) and return Ok(None). Thus, will always return
1913 /// Ok(_) if debug assertions are turned on or preconditions are met.
1914 pub fn get_update_fail_htlc<L: Deref>(&mut self, htlc_id_arg: u64, err_packet: msgs::OnionErrorPacket, logger: &L) -> Result<Option<msgs::UpdateFailHTLC>, ChannelError> where L::Target: Logger {
1915 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
1916 panic!("Was asked to fail an HTLC when channel was not in an operational state");
1918 assert_eq!(self.channel_state & ChannelState::ShutdownComplete as u32, 0);
1920 // ChannelManager may generate duplicate claims/fails due to HTLC update events from
1921 // on-chain ChannelsMonitors during block rescan. Ideally we'd figure out a way to drop
1922 // these, but for now we just have to treat them as normal.
1924 let mut pending_idx = core::usize::MAX;
1925 for (idx, htlc) in self.pending_inbound_htlcs.iter().enumerate() {
1926 if htlc.htlc_id == htlc_id_arg {
1928 InboundHTLCState::Committed => {},
1929 InboundHTLCState::LocalRemoved(ref reason) => {
1930 if let &InboundHTLCRemovalReason::Fulfill(_) = reason {
1932 debug_assert!(false, "Tried to fail an HTLC that was already failed");
1937 debug_assert!(false, "Have an inbound HTLC we tried to claim before it was fully committed to");
1938 return Err(ChannelError::Ignore(format!("Unable to find a pending HTLC which matched the given HTLC ID ({})", htlc.htlc_id)));
1944 if pending_idx == core::usize::MAX {
1945 #[cfg(any(test, fuzzing))]
1946 // If we failed to find an HTLC to fail, make sure it was previously fulfilled and this
1947 // is simply a duplicate fail, not previously failed and we failed-back too early.
1948 debug_assert!(self.historical_inbound_htlc_fulfills.contains(&htlc_id_arg));
1952 // Now update local state:
1953 if (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32 | ChannelState::PeerDisconnected as u32 | ChannelState::MonitorUpdateFailed as u32)) != 0 {
1954 for pending_update in self.holding_cell_htlc_updates.iter() {
1955 match pending_update {
1956 &HTLCUpdateAwaitingACK::ClaimHTLC { htlc_id, .. } => {
1957 if htlc_id_arg == htlc_id {
1958 #[cfg(any(test, fuzzing))]
1959 debug_assert!(self.historical_inbound_htlc_fulfills.contains(&htlc_id_arg));
1963 &HTLCUpdateAwaitingACK::FailHTLC { htlc_id, .. } => {
1964 if htlc_id_arg == htlc_id {
1965 debug_assert!(false, "Tried to fail an HTLC that was already failed");
1966 return Err(ChannelError::Ignore("Unable to find a pending HTLC which matched the given HTLC ID".to_owned()));
1972 log_trace!(logger, "Placing failure for HTLC ID {} in holding cell in channel {}.", htlc_id_arg, log_bytes!(self.channel_id()));
1973 self.holding_cell_htlc_updates.push(HTLCUpdateAwaitingACK::FailHTLC {
1974 htlc_id: htlc_id_arg,
1980 log_trace!(logger, "Failing HTLC ID {} back with a update_fail_htlc message in channel {}.", htlc_id_arg, log_bytes!(self.channel_id()));
1982 let htlc = &mut self.pending_inbound_htlcs[pending_idx];
1983 htlc.state = InboundHTLCState::LocalRemoved(InboundHTLCRemovalReason::FailRelay(err_packet.clone()));
1986 Ok(Some(msgs::UpdateFailHTLC {
1987 channel_id: self.channel_id(),
1988 htlc_id: htlc_id_arg,
1993 // Message handlers:
1995 pub fn accept_channel(&mut self, msg: &msgs::AcceptChannel, default_limits: &ChannelHandshakeLimits, their_features: &InitFeatures) -> Result<(), ChannelError> {
1996 let peer_limits = if let Some(ref limits) = self.inbound_handshake_limits_override { limits } else { default_limits };
1998 // Check sanity of message fields:
1999 if !self.is_outbound() {
2000 return Err(ChannelError::Close("Got an accept_channel message from an inbound peer".to_owned()));
2002 if self.channel_state != ChannelState::OurInitSent as u32 {
2003 return Err(ChannelError::Close("Got an accept_channel message at a strange time".to_owned()));
2005 if msg.dust_limit_satoshis > 21000000 * 100000000 {
2006 return Err(ChannelError::Close(format!("Peer never wants payout outputs? dust_limit_satoshis was {}", msg.dust_limit_satoshis)));
2008 if msg.channel_reserve_satoshis > self.channel_value_satoshis {
2009 return Err(ChannelError::Close(format!("Bogus channel_reserve_satoshis ({}). Must not be greater than ({})", msg.channel_reserve_satoshis, self.channel_value_satoshis)));
2011 if msg.dust_limit_satoshis > self.holder_selected_channel_reserve_satoshis {
2012 return Err(ChannelError::Close(format!("Dust limit ({}) is bigger than our channel reserve ({})", msg.dust_limit_satoshis, self.holder_selected_channel_reserve_satoshis)));
2014 if msg.channel_reserve_satoshis > self.channel_value_satoshis - self.holder_selected_channel_reserve_satoshis {
2015 return Err(ChannelError::Close(format!("Bogus channel_reserve_satoshis ({}). Must not be greater than channel value minus our reserve ({})",
2016 msg.channel_reserve_satoshis, self.channel_value_satoshis - self.holder_selected_channel_reserve_satoshis)));
2018 let full_channel_value_msat = (self.channel_value_satoshis - msg.channel_reserve_satoshis) * 1000;
2019 if msg.htlc_minimum_msat >= full_channel_value_msat {
2020 return Err(ChannelError::Close(format!("Minimum htlc value ({}) is full channel value ({})", msg.htlc_minimum_msat, full_channel_value_msat)));
2022 let max_delay_acceptable = u16::min(peer_limits.their_to_self_delay, MAX_LOCAL_BREAKDOWN_TIMEOUT);
2023 if msg.to_self_delay > max_delay_acceptable {
2024 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)));
2026 if msg.max_accepted_htlcs < 1 {
2027 return Err(ChannelError::Close("0 max_accepted_htlcs makes for a useless channel".to_owned()));
2029 if msg.max_accepted_htlcs > MAX_HTLCS {
2030 return Err(ChannelError::Close(format!("max_accepted_htlcs was {}. It must not be larger than {}", msg.max_accepted_htlcs, MAX_HTLCS)));
2033 // Now check against optional parameters as set by config...
2034 if msg.htlc_minimum_msat > peer_limits.max_htlc_minimum_msat {
2035 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)));
2037 if msg.max_htlc_value_in_flight_msat < peer_limits.min_max_htlc_value_in_flight_msat {
2038 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)));
2040 if msg.channel_reserve_satoshis > peer_limits.max_channel_reserve_satoshis {
2041 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)));
2043 if msg.max_accepted_htlcs < peer_limits.min_max_accepted_htlcs {
2044 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)));
2046 if msg.dust_limit_satoshis < MIN_CHAN_DUST_LIMIT_SATOSHIS {
2047 return Err(ChannelError::Close(format!("dust_limit_satoshis ({}) is less than the implementation limit ({})", msg.dust_limit_satoshis, MIN_CHAN_DUST_LIMIT_SATOSHIS)));
2049 if msg.dust_limit_satoshis > MAX_CHAN_DUST_LIMIT_SATOSHIS {
2050 return Err(ChannelError::Close(format!("dust_limit_satoshis ({}) is greater than the implementation limit ({})", msg.dust_limit_satoshis, MAX_CHAN_DUST_LIMIT_SATOSHIS)));
2052 if msg.minimum_depth > peer_limits.max_minimum_depth {
2053 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)));
2056 if let Some(ty) = &msg.channel_type {
2057 if *ty != self.channel_type {
2058 return Err(ChannelError::Close("Channel Type in accept_channel didn't match the one sent in open_channel.".to_owned()));
2060 } else if their_features.supports_channel_type() {
2061 // Assume they've accepted the channel type as they said they understand it.
2063 self.channel_type = ChannelTypeFeatures::from_counterparty_init(&their_features)
2066 let counterparty_shutdown_scriptpubkey = if their_features.supports_upfront_shutdown_script() {
2067 match &msg.shutdown_scriptpubkey {
2068 &OptionalField::Present(ref script) => {
2069 // Peer is signaling upfront_shutdown and has opt-out with a 0-length script. We don't enforce anything
2070 if script.len() == 0 {
2073 if !script::is_bolt2_compliant(&script, their_features) {
2074 return Err(ChannelError::Close(format!("Peer is signaling upfront_shutdown but has provided an unacceptable scriptpubkey format: {}", script)));
2076 Some(script.clone())
2079 // 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
2080 &OptionalField::Absent => {
2081 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()));
2086 self.counterparty_dust_limit_satoshis = msg.dust_limit_satoshis;
2087 self.counterparty_max_htlc_value_in_flight_msat = cmp::min(msg.max_htlc_value_in_flight_msat, self.channel_value_satoshis * 1000);
2088 self.counterparty_selected_channel_reserve_satoshis = Some(msg.channel_reserve_satoshis);
2089 self.counterparty_htlc_minimum_msat = msg.htlc_minimum_msat;
2090 self.counterparty_max_accepted_htlcs = msg.max_accepted_htlcs;
2092 if peer_limits.trust_own_funding_0conf {
2093 self.minimum_depth = Some(msg.minimum_depth);
2095 self.minimum_depth = Some(cmp::max(1, msg.minimum_depth));
2098 let counterparty_pubkeys = ChannelPublicKeys {
2099 funding_pubkey: msg.funding_pubkey,
2100 revocation_basepoint: msg.revocation_basepoint,
2101 payment_point: msg.payment_point,
2102 delayed_payment_basepoint: msg.delayed_payment_basepoint,
2103 htlc_basepoint: msg.htlc_basepoint
2106 self.channel_transaction_parameters.counterparty_parameters = Some(CounterpartyChannelTransactionParameters {
2107 selected_contest_delay: msg.to_self_delay,
2108 pubkeys: counterparty_pubkeys,
2111 self.counterparty_cur_commitment_point = Some(msg.first_per_commitment_point);
2112 self.counterparty_shutdown_scriptpubkey = counterparty_shutdown_scriptpubkey;
2114 self.channel_state = ChannelState::OurInitSent as u32 | ChannelState::TheirInitSent as u32;
2115 self.inbound_handshake_limits_override = None; // We're done enforcing limits on our peer's handshake now.
2120 fn funding_created_signature<L: Deref>(&mut self, sig: &Signature, logger: &L) -> Result<(Txid, CommitmentTransaction, Signature), ChannelError> where L::Target: Logger {
2121 let funding_script = self.get_funding_redeemscript();
2123 let keys = self.build_holder_transaction_keys(self.cur_holder_commitment_transaction_number)?;
2124 let initial_commitment_tx = self.build_commitment_transaction(self.cur_holder_commitment_transaction_number, &keys, true, false, logger).tx;
2126 let trusted_tx = initial_commitment_tx.trust();
2127 let initial_commitment_bitcoin_tx = trusted_tx.built_transaction();
2128 let sighash = initial_commitment_bitcoin_tx.get_sighash_all(&funding_script, self.channel_value_satoshis);
2129 // They sign the holder commitment transaction...
2130 log_trace!(logger, "Checking funding_created tx signature {} by key {} against tx {} (sighash {}) with redeemscript {} for channel {}.",
2131 log_bytes!(sig.serialize_compact()[..]), log_bytes!(self.counterparty_funding_pubkey().serialize()),
2132 encode::serialize_hex(&initial_commitment_bitcoin_tx.transaction), log_bytes!(sighash[..]),
2133 encode::serialize_hex(&funding_script), log_bytes!(self.channel_id()));
2134 secp_check!(self.secp_ctx.verify_ecdsa(&sighash, &sig, self.counterparty_funding_pubkey()), "Invalid funding_created signature from peer".to_owned());
2137 let counterparty_keys = self.build_remote_transaction_keys()?;
2138 let counterparty_initial_commitment_tx = self.build_commitment_transaction(self.cur_counterparty_commitment_transaction_number, &counterparty_keys, false, false, logger).tx;
2140 let counterparty_trusted_tx = counterparty_initial_commitment_tx.trust();
2141 let counterparty_initial_bitcoin_tx = counterparty_trusted_tx.built_transaction();
2142 log_trace!(logger, "Initial counterparty tx for channel {} is: txid {} tx {}",
2143 log_bytes!(self.channel_id()), counterparty_initial_bitcoin_tx.txid, encode::serialize_hex(&counterparty_initial_bitcoin_tx.transaction));
2145 let counterparty_signature = self.holder_signer.sign_counterparty_commitment(&counterparty_initial_commitment_tx, Vec::new(), &self.secp_ctx)
2146 .map_err(|_| ChannelError::Close("Failed to get signatures for new commitment_signed".to_owned()))?.0;
2148 // We sign "counterparty" commitment transaction, allowing them to broadcast the tx if they wish.
2149 Ok((counterparty_initial_bitcoin_tx.txid, initial_commitment_tx, counterparty_signature))
2152 fn counterparty_funding_pubkey(&self) -> &PublicKey {
2153 &self.get_counterparty_pubkeys().funding_pubkey
2156 pub fn funding_created<L: Deref>(&mut self, msg: &msgs::FundingCreated, best_block: BestBlock, logger: &L) -> Result<(msgs::FundingSigned, ChannelMonitor<Signer>, Option<msgs::ChannelReady>), ChannelError> where L::Target: Logger {
2157 if self.is_outbound() {
2158 return Err(ChannelError::Close("Received funding_created for an outbound channel?".to_owned()));
2160 if self.channel_state != (ChannelState::OurInitSent as u32 | ChannelState::TheirInitSent as u32) {
2161 // BOLT 2 says that if we disconnect before we send funding_signed we SHOULD NOT
2162 // remember the channel, so it's safe to just send an error_message here and drop the
2164 return Err(ChannelError::Close("Received funding_created after we got the channel!".to_owned()));
2166 if self.inbound_awaiting_accept {
2167 return Err(ChannelError::Close("FundingCreated message received before the channel was accepted".to_owned()));
2169 if self.commitment_secrets.get_min_seen_secret() != (1 << 48) ||
2170 self.cur_counterparty_commitment_transaction_number != INITIAL_COMMITMENT_NUMBER ||
2171 self.cur_holder_commitment_transaction_number != INITIAL_COMMITMENT_NUMBER {
2172 panic!("Should not have advanced channel commitment tx numbers prior to funding_created");
2175 let funding_txo = OutPoint { txid: msg.funding_txid, index: msg.funding_output_index };
2176 self.channel_transaction_parameters.funding_outpoint = Some(funding_txo);
2177 // This is an externally observable change before we finish all our checks. In particular
2178 // funding_created_signature may fail.
2179 self.holder_signer.ready_channel(&self.channel_transaction_parameters);
2181 let (counterparty_initial_commitment_txid, initial_commitment_tx, signature) = match self.funding_created_signature(&msg.signature, logger) {
2183 Err(ChannelError::Close(e)) => {
2184 self.channel_transaction_parameters.funding_outpoint = None;
2185 return Err(ChannelError::Close(e));
2188 // The only error we know how to handle is ChannelError::Close, so we fall over here
2189 // to make sure we don't continue with an inconsistent state.
2190 panic!("unexpected error type from funding_created_signature {:?}", e);
2194 let holder_commitment_tx = HolderCommitmentTransaction::new(
2195 initial_commitment_tx,
2198 &self.get_holder_pubkeys().funding_pubkey,
2199 self.counterparty_funding_pubkey()
2202 self.holder_signer.validate_holder_commitment(&holder_commitment_tx, Vec::new())
2203 .map_err(|_| ChannelError::Close("Failed to validate our commitment".to_owned()))?;
2205 // Now that we're past error-generating stuff, update our local state:
2207 let funding_redeemscript = self.get_funding_redeemscript();
2208 let funding_txo_script = funding_redeemscript.to_v0_p2wsh();
2209 let obscure_factor = get_commitment_transaction_number_obscure_factor(&self.get_holder_pubkeys().payment_point, &self.get_counterparty_pubkeys().payment_point, self.is_outbound());
2210 let shutdown_script = self.shutdown_scriptpubkey.clone().map(|script| script.into_inner());
2211 let channel_monitor = ChannelMonitor::new(self.secp_ctx.clone(), self.holder_signer.clone(),
2212 shutdown_script, self.get_holder_selected_contest_delay(),
2213 &self.destination_script, (funding_txo, funding_txo_script.clone()),
2214 &self.channel_transaction_parameters,
2215 funding_redeemscript.clone(), self.channel_value_satoshis,
2217 holder_commitment_tx, best_block);
2219 channel_monitor.provide_latest_counterparty_commitment_tx(counterparty_initial_commitment_txid, Vec::new(), self.cur_counterparty_commitment_transaction_number, self.counterparty_cur_commitment_point.unwrap(), logger);
2221 self.channel_state = ChannelState::FundingSent as u32;
2222 self.channel_id = funding_txo.to_channel_id();
2223 self.cur_counterparty_commitment_transaction_number -= 1;
2224 self.cur_holder_commitment_transaction_number -= 1;
2226 log_info!(logger, "Generated funding_signed for peer for channel {}", log_bytes!(self.channel_id()));
2228 Ok((msgs::FundingSigned {
2229 channel_id: self.channel_id,
2231 }, channel_monitor, self.check_get_channel_ready(0)))
2234 /// Handles a funding_signed message from the remote end.
2235 /// If this call is successful, broadcast the funding transaction (and not before!)
2236 pub fn funding_signed<L: Deref>(&mut self, msg: &msgs::FundingSigned, best_block: BestBlock, logger: &L) -> Result<(ChannelMonitor<Signer>, Transaction, Option<msgs::ChannelReady>), ChannelError> where L::Target: Logger {
2237 if !self.is_outbound() {
2238 return Err(ChannelError::Close("Received funding_signed for an inbound channel?".to_owned()));
2240 if self.channel_state & !(ChannelState::MonitorUpdateFailed as u32) != ChannelState::FundingCreated as u32 {
2241 return Err(ChannelError::Close("Received funding_signed in strange state!".to_owned()));
2243 if self.commitment_secrets.get_min_seen_secret() != (1 << 48) ||
2244 self.cur_counterparty_commitment_transaction_number != INITIAL_COMMITMENT_NUMBER ||
2245 self.cur_holder_commitment_transaction_number != INITIAL_COMMITMENT_NUMBER {
2246 panic!("Should not have advanced channel commitment tx numbers prior to funding_created");
2249 let funding_script = self.get_funding_redeemscript();
2251 let counterparty_keys = self.build_remote_transaction_keys()?;
2252 let counterparty_initial_commitment_tx = self.build_commitment_transaction(self.cur_counterparty_commitment_transaction_number, &counterparty_keys, false, false, logger).tx;
2253 let counterparty_trusted_tx = counterparty_initial_commitment_tx.trust();
2254 let counterparty_initial_bitcoin_tx = counterparty_trusted_tx.built_transaction();
2256 log_trace!(logger, "Initial counterparty tx for channel {} is: txid {} tx {}",
2257 log_bytes!(self.channel_id()), counterparty_initial_bitcoin_tx.txid, encode::serialize_hex(&counterparty_initial_bitcoin_tx.transaction));
2259 let holder_signer = self.build_holder_transaction_keys(self.cur_holder_commitment_transaction_number)?;
2260 let initial_commitment_tx = self.build_commitment_transaction(self.cur_holder_commitment_transaction_number, &holder_signer, true, false, logger).tx;
2262 let trusted_tx = initial_commitment_tx.trust();
2263 let initial_commitment_bitcoin_tx = trusted_tx.built_transaction();
2264 let sighash = initial_commitment_bitcoin_tx.get_sighash_all(&funding_script, self.channel_value_satoshis);
2265 // They sign our commitment transaction, allowing us to broadcast the tx if we wish.
2266 if let Err(_) = self.secp_ctx.verify_ecdsa(&sighash, &msg.signature, &self.get_counterparty_pubkeys().funding_pubkey) {
2267 return Err(ChannelError::Close("Invalid funding_signed signature from peer".to_owned()));
2271 let holder_commitment_tx = HolderCommitmentTransaction::new(
2272 initial_commitment_tx,
2275 &self.get_holder_pubkeys().funding_pubkey,
2276 self.counterparty_funding_pubkey()
2279 self.holder_signer.validate_holder_commitment(&holder_commitment_tx, Vec::new())
2280 .map_err(|_| ChannelError::Close("Failed to validate our commitment".to_owned()))?;
2283 let funding_redeemscript = self.get_funding_redeemscript();
2284 let funding_txo = self.get_funding_txo().unwrap();
2285 let funding_txo_script = funding_redeemscript.to_v0_p2wsh();
2286 let obscure_factor = get_commitment_transaction_number_obscure_factor(&self.get_holder_pubkeys().payment_point, &self.get_counterparty_pubkeys().payment_point, self.is_outbound());
2287 let shutdown_script = self.shutdown_scriptpubkey.clone().map(|script| script.into_inner());
2288 let channel_monitor = ChannelMonitor::new(self.secp_ctx.clone(), self.holder_signer.clone(),
2289 shutdown_script, self.get_holder_selected_contest_delay(),
2290 &self.destination_script, (funding_txo, funding_txo_script),
2291 &self.channel_transaction_parameters,
2292 funding_redeemscript.clone(), self.channel_value_satoshis,
2294 holder_commitment_tx, best_block);
2296 channel_monitor.provide_latest_counterparty_commitment_tx(counterparty_initial_bitcoin_tx.txid, Vec::new(), self.cur_counterparty_commitment_transaction_number, self.counterparty_cur_commitment_point.unwrap(), logger);
2298 assert_eq!(self.channel_state & (ChannelState::MonitorUpdateFailed as u32), 0); // We have no had any monitor(s) yet to fail update!
2299 self.channel_state = ChannelState::FundingSent as u32;
2300 self.cur_holder_commitment_transaction_number -= 1;
2301 self.cur_counterparty_commitment_transaction_number -= 1;
2303 log_info!(logger, "Received funding_signed from peer for channel {}", log_bytes!(self.channel_id()));
2305 Ok((channel_monitor, self.funding_transaction.as_ref().cloned().unwrap(), self.check_get_channel_ready(0)))
2308 /// Handles a channel_ready message from our peer. If we've already sent our channel_ready
2309 /// and the channel is now usable (and public), this may generate an announcement_signatures to
2311 pub fn channel_ready<L: Deref>(&mut self, msg: &msgs::ChannelReady, node_pk: PublicKey, genesis_block_hash: BlockHash, best_block: &BestBlock, logger: &L) -> Result<Option<msgs::AnnouncementSignatures>, ChannelError> where L::Target: Logger {
2312 if self.channel_state & (ChannelState::PeerDisconnected as u32) == ChannelState::PeerDisconnected as u32 {
2313 self.workaround_lnd_bug_4006 = Some(msg.clone());
2314 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()));
2317 if let Some(scid_alias) = msg.short_channel_id_alias {
2318 if Some(scid_alias) != self.short_channel_id {
2319 // The scid alias provided can be used to route payments *from* our counterparty,
2320 // i.e. can be used for inbound payments and provided in invoices, but is not used
2321 // when routing outbound payments.
2322 self.latest_inbound_scid_alias = Some(scid_alias);
2326 let non_shutdown_state = self.channel_state & (!MULTI_STATE_FLAGS);
2328 if non_shutdown_state == ChannelState::FundingSent as u32 {
2329 self.channel_state |= ChannelState::TheirChannelReady as u32;
2330 } else if non_shutdown_state == (ChannelState::FundingSent as u32 | ChannelState::OurChannelReady as u32) {
2331 self.channel_state = ChannelState::ChannelFunded as u32 | (self.channel_state & MULTI_STATE_FLAGS);
2332 self.update_time_counter += 1;
2333 } else if self.channel_state & (ChannelState::ChannelFunded as u32) != 0 ||
2334 // If we reconnected before sending our `channel_ready` they may still resend theirs:
2335 (self.channel_state & (ChannelState::FundingSent as u32 | ChannelState::TheirChannelReady as u32) ==
2336 (ChannelState::FundingSent as u32 | ChannelState::TheirChannelReady as u32))
2338 // They probably disconnected/reconnected and re-sent the channel_ready, which is
2339 // required, or they're sending a fresh SCID alias.
2340 let expected_point =
2341 if self.cur_counterparty_commitment_transaction_number == INITIAL_COMMITMENT_NUMBER - 1 {
2342 // If they haven't ever sent an updated point, the point they send should match
2344 self.counterparty_cur_commitment_point
2346 // If they have sent updated points, channel_ready is always supposed to match
2347 // their "first" point, which we re-derive here.
2348 Some(PublicKey::from_secret_key(&self.secp_ctx, &SecretKey::from_slice(
2349 &self.commitment_secrets.get_secret(INITIAL_COMMITMENT_NUMBER - 1).expect("We should have all prev secrets available")
2350 ).expect("We already advanced, so previous secret keys should have been validated already")))
2352 if expected_point != Some(msg.next_per_commitment_point) {
2353 return Err(ChannelError::Close("Peer sent a reconnect channel_ready with a different point".to_owned()));
2357 return Err(ChannelError::Close("Peer sent a channel_ready at a strange time".to_owned()));
2360 self.counterparty_prev_commitment_point = self.counterparty_cur_commitment_point;
2361 self.counterparty_cur_commitment_point = Some(msg.next_per_commitment_point);
2363 log_info!(logger, "Received channel_ready from peer for channel {}", log_bytes!(self.channel_id()));
2365 Ok(self.get_announcement_sigs(node_pk, genesis_block_hash, best_block.height(), logger))
2368 /// Returns transaction if there is pending funding transaction that is yet to broadcast
2369 pub fn unbroadcasted_funding(&self) -> Option<Transaction> {
2370 if self.channel_state & (ChannelState::FundingCreated as u32) != 0 {
2371 self.funding_transaction.clone()
2377 /// Returns a HTLCStats about inbound pending htlcs
2378 fn get_inbound_pending_htlc_stats(&self, outbound_feerate_update: Option<u32>) -> HTLCStats {
2379 let mut stats = HTLCStats {
2380 pending_htlcs: self.pending_inbound_htlcs.len() as u32,
2381 pending_htlcs_value_msat: 0,
2382 on_counterparty_tx_dust_exposure_msat: 0,
2383 on_holder_tx_dust_exposure_msat: 0,
2384 holding_cell_msat: 0,
2385 on_holder_tx_holding_cell_htlcs_count: 0,
2388 let counterparty_dust_limit_timeout_sat = (self.get_dust_buffer_feerate(outbound_feerate_update) as u64 * htlc_timeout_tx_weight(self.opt_anchors()) / 1000) + self.counterparty_dust_limit_satoshis;
2389 let holder_dust_limit_success_sat = (self.get_dust_buffer_feerate(outbound_feerate_update) as u64 * htlc_success_tx_weight(self.opt_anchors()) / 1000) + self.holder_dust_limit_satoshis;
2390 for ref htlc in self.pending_inbound_htlcs.iter() {
2391 stats.pending_htlcs_value_msat += htlc.amount_msat;
2392 if htlc.amount_msat / 1000 < counterparty_dust_limit_timeout_sat {
2393 stats.on_counterparty_tx_dust_exposure_msat += htlc.amount_msat;
2395 if htlc.amount_msat / 1000 < holder_dust_limit_success_sat {
2396 stats.on_holder_tx_dust_exposure_msat += htlc.amount_msat;
2402 /// Returns a HTLCStats about pending outbound htlcs, *including* pending adds in our holding cell.
2403 fn get_outbound_pending_htlc_stats(&self, outbound_feerate_update: Option<u32>) -> HTLCStats {
2404 let mut stats = HTLCStats {
2405 pending_htlcs: self.pending_outbound_htlcs.len() as u32,
2406 pending_htlcs_value_msat: 0,
2407 on_counterparty_tx_dust_exposure_msat: 0,
2408 on_holder_tx_dust_exposure_msat: 0,
2409 holding_cell_msat: 0,
2410 on_holder_tx_holding_cell_htlcs_count: 0,
2413 let counterparty_dust_limit_success_sat = (self.get_dust_buffer_feerate(outbound_feerate_update) as u64 * htlc_success_tx_weight(self.opt_anchors()) / 1000) + self.counterparty_dust_limit_satoshis;
2414 let holder_dust_limit_timeout_sat = (self.get_dust_buffer_feerate(outbound_feerate_update) as u64 * htlc_timeout_tx_weight(self.opt_anchors()) / 1000) + self.holder_dust_limit_satoshis;
2415 for ref htlc in self.pending_outbound_htlcs.iter() {
2416 stats.pending_htlcs_value_msat += htlc.amount_msat;
2417 if htlc.amount_msat / 1000 < counterparty_dust_limit_success_sat {
2418 stats.on_counterparty_tx_dust_exposure_msat += htlc.amount_msat;
2420 if htlc.amount_msat / 1000 < holder_dust_limit_timeout_sat {
2421 stats.on_holder_tx_dust_exposure_msat += htlc.amount_msat;
2425 for update in self.holding_cell_htlc_updates.iter() {
2426 if let &HTLCUpdateAwaitingACK::AddHTLC { ref amount_msat, .. } = update {
2427 stats.pending_htlcs += 1;
2428 stats.pending_htlcs_value_msat += amount_msat;
2429 stats.holding_cell_msat += amount_msat;
2430 if *amount_msat / 1000 < counterparty_dust_limit_success_sat {
2431 stats.on_counterparty_tx_dust_exposure_msat += amount_msat;
2433 if *amount_msat / 1000 < holder_dust_limit_timeout_sat {
2434 stats.on_holder_tx_dust_exposure_msat += amount_msat;
2436 stats.on_holder_tx_holding_cell_htlcs_count += 1;
2443 /// Get the available balances, see [`AvailableBalances`]'s fields for more info.
2444 /// Doesn't bother handling the
2445 /// if-we-removed-it-already-but-haven't-fully-resolved-they-can-still-send-an-inbound-HTLC
2446 /// corner case properly.
2447 pub fn get_available_balances(&self) -> AvailableBalances {
2448 // Note that we have to handle overflow due to the above case.
2449 let outbound_stats = self.get_outbound_pending_htlc_stats(None);
2451 let mut balance_msat = self.value_to_self_msat;
2452 for ref htlc in self.pending_inbound_htlcs.iter() {
2453 if let InboundHTLCState::LocalRemoved(InboundHTLCRemovalReason::Fulfill(_)) = htlc.state {
2454 balance_msat += htlc.amount_msat;
2457 balance_msat -= outbound_stats.pending_htlcs_value_msat;
2459 let outbound_capacity_msat = cmp::max(self.value_to_self_msat as i64
2460 - outbound_stats.pending_htlcs_value_msat as i64
2461 - self.counterparty_selected_channel_reserve_satoshis.unwrap_or(0) as i64 * 1000,
2464 inbound_capacity_msat: cmp::max(self.channel_value_satoshis as i64 * 1000
2465 - self.value_to_self_msat as i64
2466 - self.get_inbound_pending_htlc_stats(None).pending_htlcs_value_msat as i64
2467 - self.holder_selected_channel_reserve_satoshis as i64 * 1000,
2469 outbound_capacity_msat,
2470 next_outbound_htlc_limit_msat: cmp::max(cmp::min(outbound_capacity_msat as i64,
2471 self.counterparty_max_htlc_value_in_flight_msat as i64
2472 - outbound_stats.pending_htlcs_value_msat as i64),
2478 pub fn get_holder_counterparty_selected_channel_reserve_satoshis(&self) -> (u64, Option<u64>) {
2479 (self.holder_selected_channel_reserve_satoshis, self.counterparty_selected_channel_reserve_satoshis)
2482 // Get the fee cost in MSATS of a commitment tx with a given number of HTLC outputs.
2483 // Note that num_htlcs should not include dust HTLCs.
2484 fn commit_tx_fee_msat(feerate_per_kw: u32, num_htlcs: usize, opt_anchors: bool) -> u64 {
2485 // Note that we need to divide before multiplying to round properly,
2486 // since the lowest denomination of bitcoin on-chain is the satoshi.
2487 (commitment_tx_base_weight(opt_anchors) + num_htlcs as u64 * COMMITMENT_TX_WEIGHT_PER_HTLC) * feerate_per_kw as u64 / 1000 * 1000
2490 // Get the fee cost in SATS of a commitment tx with a given number of HTLC outputs.
2491 // Note that num_htlcs should not include dust HTLCs.
2493 fn commit_tx_fee_sat(feerate_per_kw: u32, num_htlcs: usize, opt_anchors: bool) -> u64 {
2494 feerate_per_kw as u64 * (commitment_tx_base_weight(opt_anchors) + num_htlcs as u64 * COMMITMENT_TX_WEIGHT_PER_HTLC) / 1000
2497 // Get the commitment tx fee for the local's (i.e. our) next commitment transaction based on the
2498 // number of pending HTLCs that are on track to be in our next commitment tx, plus an additional
2499 // HTLC if `fee_spike_buffer_htlc` is Some, plus a new HTLC given by `new_htlc_amount`. Dust HTLCs
2501 fn next_local_commit_tx_fee_msat(&self, htlc: HTLCCandidate, fee_spike_buffer_htlc: Option<()>) -> u64 {
2502 assert!(self.is_outbound());
2504 let real_dust_limit_success_sat = (self.feerate_per_kw as u64 * htlc_success_tx_weight(self.opt_anchors()) / 1000) + self.holder_dust_limit_satoshis;
2505 let real_dust_limit_timeout_sat = (self.feerate_per_kw as u64 * htlc_timeout_tx_weight(self.opt_anchors()) / 1000) + self.holder_dust_limit_satoshis;
2507 let mut addl_htlcs = 0;
2508 if fee_spike_buffer_htlc.is_some() { addl_htlcs += 1; }
2510 HTLCInitiator::LocalOffered => {
2511 if htlc.amount_msat / 1000 >= real_dust_limit_timeout_sat {
2515 HTLCInitiator::RemoteOffered => {
2516 if htlc.amount_msat / 1000 >= real_dust_limit_success_sat {
2522 let mut included_htlcs = 0;
2523 for ref htlc in self.pending_inbound_htlcs.iter() {
2524 if htlc.amount_msat / 1000 < real_dust_limit_success_sat {
2527 // We include LocalRemoved HTLCs here because we may still need to broadcast a commitment
2528 // transaction including this HTLC if it times out before they RAA.
2529 included_htlcs += 1;
2532 for ref htlc in self.pending_outbound_htlcs.iter() {
2533 if htlc.amount_msat / 1000 < real_dust_limit_timeout_sat {
2537 OutboundHTLCState::LocalAnnounced {..} => included_htlcs += 1,
2538 OutboundHTLCState::Committed => included_htlcs += 1,
2539 OutboundHTLCState::RemoteRemoved {..} => included_htlcs += 1,
2540 // We don't include AwaitingRemoteRevokeToRemove HTLCs because our next commitment
2541 // transaction won't be generated until they send us their next RAA, which will mean
2542 // dropping any HTLCs in this state.
2547 for htlc in self.holding_cell_htlc_updates.iter() {
2549 &HTLCUpdateAwaitingACK::AddHTLC { amount_msat, .. } => {
2550 if amount_msat / 1000 < real_dust_limit_timeout_sat {
2555 _ => {}, // Don't include claims/fails that are awaiting ack, because once we get the
2556 // ack we're guaranteed to never include them in commitment txs anymore.
2560 let num_htlcs = included_htlcs + addl_htlcs;
2561 let res = Self::commit_tx_fee_msat(self.feerate_per_kw, num_htlcs, self.opt_anchors());
2562 #[cfg(any(test, fuzzing))]
2565 if fee_spike_buffer_htlc.is_some() {
2566 fee = Self::commit_tx_fee_msat(self.feerate_per_kw, num_htlcs - 1, self.opt_anchors());
2568 let total_pending_htlcs = self.pending_inbound_htlcs.len() + self.pending_outbound_htlcs.len()
2569 + self.holding_cell_htlc_updates.len();
2570 let commitment_tx_info = CommitmentTxInfoCached {
2572 total_pending_htlcs,
2573 next_holder_htlc_id: match htlc.origin {
2574 HTLCInitiator::LocalOffered => self.next_holder_htlc_id + 1,
2575 HTLCInitiator::RemoteOffered => self.next_holder_htlc_id,
2577 next_counterparty_htlc_id: match htlc.origin {
2578 HTLCInitiator::LocalOffered => self.next_counterparty_htlc_id,
2579 HTLCInitiator::RemoteOffered => self.next_counterparty_htlc_id + 1,
2581 feerate: self.feerate_per_kw,
2583 *self.next_local_commitment_tx_fee_info_cached.lock().unwrap() = Some(commitment_tx_info);
2588 // Get the commitment tx fee for the remote's next commitment transaction based on the number of
2589 // pending HTLCs that are on track to be in their next commitment tx, plus an additional HTLC if
2590 // `fee_spike_buffer_htlc` is Some, plus a new HTLC given by `new_htlc_amount`. Dust HTLCs are
2592 fn next_remote_commit_tx_fee_msat(&self, htlc: HTLCCandidate, fee_spike_buffer_htlc: Option<()>) -> u64 {
2593 assert!(!self.is_outbound());
2595 let real_dust_limit_success_sat = (self.feerate_per_kw as u64 * htlc_success_tx_weight(self.opt_anchors()) / 1000) + self.counterparty_dust_limit_satoshis;
2596 let real_dust_limit_timeout_sat = (self.feerate_per_kw as u64 * htlc_timeout_tx_weight(self.opt_anchors()) / 1000) + self.counterparty_dust_limit_satoshis;
2598 let mut addl_htlcs = 0;
2599 if fee_spike_buffer_htlc.is_some() { addl_htlcs += 1; }
2601 HTLCInitiator::LocalOffered => {
2602 if htlc.amount_msat / 1000 >= real_dust_limit_success_sat {
2606 HTLCInitiator::RemoteOffered => {
2607 if htlc.amount_msat / 1000 >= real_dust_limit_timeout_sat {
2613 // When calculating the set of HTLCs which will be included in their next commitment_signed, all
2614 // non-dust inbound HTLCs are included (as all states imply it will be included) and only
2615 // committed outbound HTLCs, see below.
2616 let mut included_htlcs = 0;
2617 for ref htlc in self.pending_inbound_htlcs.iter() {
2618 if htlc.amount_msat / 1000 <= real_dust_limit_timeout_sat {
2621 included_htlcs += 1;
2624 for ref htlc in self.pending_outbound_htlcs.iter() {
2625 if htlc.amount_msat / 1000 <= real_dust_limit_success_sat {
2628 // We only include outbound HTLCs if it will not be included in their next commitment_signed,
2629 // i.e. if they've responded to us with an RAA after announcement.
2631 OutboundHTLCState::Committed => included_htlcs += 1,
2632 OutboundHTLCState::RemoteRemoved {..} => included_htlcs += 1,
2633 OutboundHTLCState::LocalAnnounced { .. } => included_htlcs += 1,
2638 let num_htlcs = included_htlcs + addl_htlcs;
2639 let res = Self::commit_tx_fee_msat(self.feerate_per_kw, num_htlcs, self.opt_anchors());
2640 #[cfg(any(test, fuzzing))]
2643 if fee_spike_buffer_htlc.is_some() {
2644 fee = Self::commit_tx_fee_msat(self.feerate_per_kw, num_htlcs - 1, self.opt_anchors());
2646 let total_pending_htlcs = self.pending_inbound_htlcs.len() + self.pending_outbound_htlcs.len();
2647 let commitment_tx_info = CommitmentTxInfoCached {
2649 total_pending_htlcs,
2650 next_holder_htlc_id: match htlc.origin {
2651 HTLCInitiator::LocalOffered => self.next_holder_htlc_id + 1,
2652 HTLCInitiator::RemoteOffered => self.next_holder_htlc_id,
2654 next_counterparty_htlc_id: match htlc.origin {
2655 HTLCInitiator::LocalOffered => self.next_counterparty_htlc_id,
2656 HTLCInitiator::RemoteOffered => self.next_counterparty_htlc_id + 1,
2658 feerate: self.feerate_per_kw,
2660 *self.next_remote_commitment_tx_fee_info_cached.lock().unwrap() = Some(commitment_tx_info);
2665 pub fn update_add_htlc<F, L: Deref>(&mut self, msg: &msgs::UpdateAddHTLC, mut pending_forward_status: PendingHTLCStatus, create_pending_htlc_status: F, logger: &L) -> Result<(), ChannelError>
2666 where F: for<'a> Fn(&'a Self, PendingHTLCStatus, u16) -> PendingHTLCStatus, L::Target: Logger {
2667 // We can't accept HTLCs sent after we've sent a shutdown.
2668 let local_sent_shutdown = (self.channel_state & (ChannelState::ChannelFunded as u32 | ChannelState::LocalShutdownSent as u32)) != (ChannelState::ChannelFunded as u32);
2669 if local_sent_shutdown {
2670 pending_forward_status = create_pending_htlc_status(self, pending_forward_status, 0x4000|8);
2672 // If the remote has sent a shutdown prior to adding this HTLC, then they are in violation of the spec.
2673 let remote_sent_shutdown = (self.channel_state & (ChannelState::ChannelFunded as u32 | ChannelState::RemoteShutdownSent as u32)) != (ChannelState::ChannelFunded as u32);
2674 if remote_sent_shutdown {
2675 return Err(ChannelError::Close("Got add HTLC message when channel was not in an operational state".to_owned()));
2677 if self.channel_state & (ChannelState::PeerDisconnected as u32) == ChannelState::PeerDisconnected as u32 {
2678 return Err(ChannelError::Close("Peer sent update_add_htlc when we needed a channel_reestablish".to_owned()));
2680 if msg.amount_msat > self.channel_value_satoshis * 1000 {
2681 return Err(ChannelError::Close("Remote side tried to send more than the total value of the channel".to_owned()));
2683 if msg.amount_msat == 0 {
2684 return Err(ChannelError::Close("Remote side tried to send a 0-msat HTLC".to_owned()));
2686 if msg.amount_msat < self.holder_htlc_minimum_msat {
2687 return Err(ChannelError::Close(format!("Remote side tried to send less than our minimum HTLC value. Lower limit: ({}). Actual: ({})", self.holder_htlc_minimum_msat, msg.amount_msat)));
2690 let inbound_stats = self.get_inbound_pending_htlc_stats(None);
2691 let outbound_stats = self.get_outbound_pending_htlc_stats(None);
2692 if inbound_stats.pending_htlcs + 1 > OUR_MAX_HTLCS as u32 {
2693 return Err(ChannelError::Close(format!("Remote tried to push more than our max accepted HTLCs ({})", OUR_MAX_HTLCS)));
2695 if inbound_stats.pending_htlcs_value_msat + msg.amount_msat > self.holder_max_htlc_value_in_flight_msat {
2696 return Err(ChannelError::Close(format!("Remote HTLC add would put them over our max HTLC value ({})", self.holder_max_htlc_value_in_flight_msat)));
2698 // Check holder_selected_channel_reserve_satoshis (we're getting paid, so they have to at least meet
2699 // the reserve_satoshis we told them to always have as direct payment so that they lose
2700 // something if we punish them for broadcasting an old state).
2701 // Note that we don't really care about having a small/no to_remote output in our local
2702 // commitment transactions, as the purpose of the channel reserve is to ensure we can
2703 // punish *them* if they misbehave, so we discount any outbound HTLCs which will not be
2704 // present in the next commitment transaction we send them (at least for fulfilled ones,
2705 // failed ones won't modify value_to_self).
2706 // Note that we will send HTLCs which another instance of rust-lightning would think
2707 // violate the reserve value if we do not do this (as we forget inbound HTLCs from the
2708 // Channel state once they will not be present in the next received commitment
2710 let mut removed_outbound_total_msat = 0;
2711 for ref htlc in self.pending_outbound_htlcs.iter() {
2712 if let OutboundHTLCState::AwaitingRemoteRevokeToRemove(OutboundHTLCOutcome::Success(_)) = htlc.state {
2713 removed_outbound_total_msat += htlc.amount_msat;
2714 } else if let OutboundHTLCState::AwaitingRemovedRemoteRevoke(OutboundHTLCOutcome::Success(_)) = htlc.state {
2715 removed_outbound_total_msat += htlc.amount_msat;
2719 let exposure_dust_limit_timeout_sats = (self.get_dust_buffer_feerate(None) as u64 * htlc_timeout_tx_weight(self.opt_anchors()) / 1000) + self.counterparty_dust_limit_satoshis;
2720 if msg.amount_msat / 1000 < exposure_dust_limit_timeout_sats {
2721 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;
2722 if on_counterparty_tx_dust_htlc_exposure_msat > self.get_max_dust_htlc_exposure_msat() {
2723 log_info!(logger, "Cannot accept value that would put our exposure to dust HTLCs at {} over the limit {} on counterparty commitment tx",
2724 on_counterparty_tx_dust_htlc_exposure_msat, self.get_max_dust_htlc_exposure_msat());
2725 pending_forward_status = create_pending_htlc_status(self, pending_forward_status, 0x1000|7);
2729 let exposure_dust_limit_success_sats = (self.get_dust_buffer_feerate(None) as u64 * htlc_success_tx_weight(self.opt_anchors()) / 1000) + self.holder_dust_limit_satoshis;
2730 if msg.amount_msat / 1000 < exposure_dust_limit_success_sats {
2731 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;
2732 if on_holder_tx_dust_htlc_exposure_msat > self.get_max_dust_htlc_exposure_msat() {
2733 log_info!(logger, "Cannot accept value that would put our exposure to dust HTLCs at {} over the limit {} on holder commitment tx",
2734 on_holder_tx_dust_htlc_exposure_msat, self.get_max_dust_htlc_exposure_msat());
2735 pending_forward_status = create_pending_htlc_status(self, pending_forward_status, 0x1000|7);
2739 let pending_value_to_self_msat =
2740 self.value_to_self_msat + inbound_stats.pending_htlcs_value_msat - removed_outbound_total_msat;
2741 let pending_remote_value_msat =
2742 self.channel_value_satoshis * 1000 - pending_value_to_self_msat;
2743 if pending_remote_value_msat < msg.amount_msat {
2744 return Err(ChannelError::Close("Remote HTLC add would overdraw remaining funds".to_owned()));
2747 // Check that the remote can afford to pay for this HTLC on-chain at the current
2748 // feerate_per_kw, while maintaining their channel reserve (as required by the spec).
2749 let remote_commit_tx_fee_msat = if self.is_outbound() { 0 } else {
2750 let htlc_candidate = HTLCCandidate::new(msg.amount_msat, HTLCInitiator::RemoteOffered);
2751 self.next_remote_commit_tx_fee_msat(htlc_candidate, None) // Don't include the extra fee spike buffer HTLC in calculations
2753 if pending_remote_value_msat - msg.amount_msat < remote_commit_tx_fee_msat {
2754 return Err(ChannelError::Close("Remote HTLC add would not leave enough to pay for fees".to_owned()));
2757 if pending_remote_value_msat - msg.amount_msat - remote_commit_tx_fee_msat < self.holder_selected_channel_reserve_satoshis * 1000 {
2758 return Err(ChannelError::Close("Remote HTLC add would put them under remote reserve value".to_owned()));
2761 if !self.is_outbound() {
2762 // `2 *` and `Some(())` is for the fee spike buffer we keep for the remote. This deviates from
2763 // the spec because in the spec, the fee spike buffer requirement doesn't exist on the
2764 // receiver's side, only on the sender's.
2765 // Note that when we eventually remove support for fee updates and switch to anchor output
2766 // fees, we will drop the `2 *`, since we no longer be as sensitive to fee spikes. But, keep
2767 // the extra htlc when calculating the next remote commitment transaction fee as we should
2768 // still be able to afford adding this HTLC plus one more future HTLC, regardless of being
2769 // sensitive to fee spikes.
2770 let htlc_candidate = HTLCCandidate::new(msg.amount_msat, HTLCInitiator::RemoteOffered);
2771 let remote_fee_cost_incl_stuck_buffer_msat = 2 * self.next_remote_commit_tx_fee_msat(htlc_candidate, Some(()));
2772 if pending_remote_value_msat - msg.amount_msat - self.holder_selected_channel_reserve_satoshis * 1000 < remote_fee_cost_incl_stuck_buffer_msat {
2773 // Note that if the pending_forward_status is not updated here, then it's because we're already failing
2774 // the HTLC, i.e. its status is already set to failing.
2775 log_info!(logger, "Attempting to fail HTLC due to fee spike buffer violation in channel {}. Rebalancing is required.", log_bytes!(self.channel_id()));
2776 pending_forward_status = create_pending_htlc_status(self, pending_forward_status, 0x1000|7);
2779 // Check that they won't violate our local required channel reserve by adding this HTLC.
2780 let htlc_candidate = HTLCCandidate::new(msg.amount_msat, HTLCInitiator::RemoteOffered);
2781 let local_commit_tx_fee_msat = self.next_local_commit_tx_fee_msat(htlc_candidate, None);
2782 if self.value_to_self_msat < self.counterparty_selected_channel_reserve_satoshis.unwrap() * 1000 + local_commit_tx_fee_msat {
2783 return Err(ChannelError::Close("Cannot accept HTLC that would put our balance under counterparty-announced channel reserve value".to_owned()));
2786 if self.next_counterparty_htlc_id != msg.htlc_id {
2787 return Err(ChannelError::Close(format!("Remote skipped HTLC ID (skipped ID: {})", self.next_counterparty_htlc_id)));
2789 if msg.cltv_expiry >= 500000000 {
2790 return Err(ChannelError::Close("Remote provided CLTV expiry in seconds instead of block height".to_owned()));
2793 if self.channel_state & ChannelState::LocalShutdownSent as u32 != 0 {
2794 if let PendingHTLCStatus::Forward(_) = pending_forward_status {
2795 panic!("ChannelManager shouldn't be trying to add a forwardable HTLC after we've started closing");
2799 // Now update local state:
2800 self.next_counterparty_htlc_id += 1;
2801 self.pending_inbound_htlcs.push(InboundHTLCOutput {
2802 htlc_id: msg.htlc_id,
2803 amount_msat: msg.amount_msat,
2804 payment_hash: msg.payment_hash,
2805 cltv_expiry: msg.cltv_expiry,
2806 state: InboundHTLCState::RemoteAnnounced(pending_forward_status),
2811 /// Marks an outbound HTLC which we have received update_fail/fulfill/malformed
2813 fn mark_outbound_htlc_removed(&mut self, htlc_id: u64, check_preimage: Option<PaymentPreimage>, fail_reason: Option<HTLCFailReason>) -> Result<&OutboundHTLCOutput, ChannelError> {
2814 assert!(!(check_preimage.is_some() && fail_reason.is_some()), "cannot fail while we have a preimage");
2815 for htlc in self.pending_outbound_htlcs.iter_mut() {
2816 if htlc.htlc_id == htlc_id {
2817 let outcome = match check_preimage {
2818 None => fail_reason.into(),
2819 Some(payment_preimage) => {
2820 let payment_hash = PaymentHash(Sha256::hash(&payment_preimage.0[..]).into_inner());
2821 if payment_hash != htlc.payment_hash {
2822 return Err(ChannelError::Close(format!("Remote tried to fulfill HTLC ({}) with an incorrect preimage", htlc_id)));
2824 OutboundHTLCOutcome::Success(Some(payment_preimage))
2828 OutboundHTLCState::LocalAnnounced(_) =>
2829 return Err(ChannelError::Close(format!("Remote tried to fulfill/fail HTLC ({}) before it had been committed", htlc_id))),
2830 OutboundHTLCState::Committed => {
2831 htlc.state = OutboundHTLCState::RemoteRemoved(outcome);
2833 OutboundHTLCState::AwaitingRemoteRevokeToRemove(_) | OutboundHTLCState::AwaitingRemovedRemoteRevoke(_) | OutboundHTLCState::RemoteRemoved(_) =>
2834 return Err(ChannelError::Close(format!("Remote tried to fulfill/fail HTLC ({}) that they'd already fulfilled/failed", htlc_id))),
2839 Err(ChannelError::Close("Remote tried to fulfill/fail an HTLC we couldn't find".to_owned()))
2842 pub fn update_fulfill_htlc(&mut self, msg: &msgs::UpdateFulfillHTLC) -> Result<(HTLCSource, u64), ChannelError> {
2843 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
2844 return Err(ChannelError::Close("Got fulfill HTLC message when channel was not in an operational state".to_owned()));
2846 if self.channel_state & (ChannelState::PeerDisconnected as u32) == ChannelState::PeerDisconnected as u32 {
2847 return Err(ChannelError::Close("Peer sent update_fulfill_htlc when we needed a channel_reestablish".to_owned()));
2850 self.mark_outbound_htlc_removed(msg.htlc_id, Some(msg.payment_preimage), None).map(|htlc| (htlc.source.clone(), htlc.amount_msat))
2853 pub fn update_fail_htlc(&mut self, msg: &msgs::UpdateFailHTLC, fail_reason: HTLCFailReason) -> Result<(), ChannelError> {
2854 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
2855 return Err(ChannelError::Close("Got fail HTLC message when channel was not in an operational state".to_owned()));
2857 if self.channel_state & (ChannelState::PeerDisconnected as u32) == ChannelState::PeerDisconnected as u32 {
2858 return Err(ChannelError::Close("Peer sent update_fail_htlc when we needed a channel_reestablish".to_owned()));
2861 self.mark_outbound_htlc_removed(msg.htlc_id, None, Some(fail_reason))?;
2865 pub fn update_fail_malformed_htlc(&mut self, msg: &msgs::UpdateFailMalformedHTLC, fail_reason: HTLCFailReason) -> Result<(), ChannelError> {
2866 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
2867 return Err(ChannelError::Close("Got fail malformed HTLC message when channel was not in an operational state".to_owned()));
2869 if self.channel_state & (ChannelState::PeerDisconnected as u32) == ChannelState::PeerDisconnected as u32 {
2870 return Err(ChannelError::Close("Peer sent update_fail_malformed_htlc when we needed a channel_reestablish".to_owned()));
2873 self.mark_outbound_htlc_removed(msg.htlc_id, None, Some(fail_reason))?;
2877 pub fn commitment_signed<L: Deref>(&mut self, msg: &msgs::CommitmentSigned, logger: &L) -> Result<(msgs::RevokeAndACK, Option<msgs::CommitmentSigned>, ChannelMonitorUpdate), (Option<ChannelMonitorUpdate>, ChannelError)>
2878 where L::Target: Logger
2880 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
2881 return Err((None, ChannelError::Close("Got commitment signed message when channel was not in an operational state".to_owned())));
2883 if self.channel_state & (ChannelState::PeerDisconnected as u32) == ChannelState::PeerDisconnected as u32 {
2884 return Err((None, ChannelError::Close("Peer sent commitment_signed when we needed a channel_reestablish".to_owned())));
2886 if self.channel_state & BOTH_SIDES_SHUTDOWN_MASK == BOTH_SIDES_SHUTDOWN_MASK && self.last_sent_closing_fee.is_some() {
2887 return Err((None, ChannelError::Close("Peer sent commitment_signed after we'd started exchanging closing_signeds".to_owned())));
2890 let funding_script = self.get_funding_redeemscript();
2892 let keys = self.build_holder_transaction_keys(self.cur_holder_commitment_transaction_number).map_err(|e| (None, e))?;
2894 let commitment_stats = self.build_commitment_transaction(self.cur_holder_commitment_transaction_number, &keys, true, false, logger);
2895 let commitment_txid = {
2896 let trusted_tx = commitment_stats.tx.trust();
2897 let bitcoin_tx = trusted_tx.built_transaction();
2898 let sighash = bitcoin_tx.get_sighash_all(&funding_script, self.channel_value_satoshis);
2900 log_trace!(logger, "Checking commitment tx signature {} by key {} against tx {} (sighash {}) with redeemscript {} in channel {}",
2901 log_bytes!(msg.signature.serialize_compact()[..]),
2902 log_bytes!(self.counterparty_funding_pubkey().serialize()), encode::serialize_hex(&bitcoin_tx.transaction),
2903 log_bytes!(sighash[..]), encode::serialize_hex(&funding_script), log_bytes!(self.channel_id()));
2904 if let Err(_) = self.secp_ctx.verify_ecdsa(&sighash, &msg.signature, &self.counterparty_funding_pubkey()) {
2905 return Err((None, ChannelError::Close("Invalid commitment tx signature from peer".to_owned())));
2909 let mut htlcs_cloned: Vec<_> = commitment_stats.htlcs_included.iter().map(|htlc| (htlc.0.clone(), htlc.1.map(|h| h.clone()))).collect();
2911 // If our counterparty updated the channel fee in this commitment transaction, check that
2912 // they can actually afford the new fee now.
2913 let update_fee = if let Some((_, update_state)) = self.pending_update_fee {
2914 update_state == FeeUpdateState::RemoteAnnounced
2917 debug_assert!(!self.is_outbound());
2918 let counterparty_reserve_we_require_msat = self.holder_selected_channel_reserve_satoshis * 1000;
2919 if commitment_stats.remote_balance_msat < commitment_stats.total_fee_sat * 1000 + counterparty_reserve_we_require_msat {
2920 return Err((None, ChannelError::Close("Funding remote cannot afford proposed new fee".to_owned())));
2923 #[cfg(any(test, fuzzing))]
2925 if self.is_outbound() {
2926 let projected_commit_tx_info = self.next_local_commitment_tx_fee_info_cached.lock().unwrap().take();
2927 *self.next_remote_commitment_tx_fee_info_cached.lock().unwrap() = None;
2928 if let Some(info) = projected_commit_tx_info {
2929 let total_pending_htlcs = self.pending_inbound_htlcs.len() + self.pending_outbound_htlcs.len()
2930 + self.holding_cell_htlc_updates.len();
2931 if info.total_pending_htlcs == total_pending_htlcs
2932 && info.next_holder_htlc_id == self.next_holder_htlc_id
2933 && info.next_counterparty_htlc_id == self.next_counterparty_htlc_id
2934 && info.feerate == self.feerate_per_kw {
2935 assert_eq!(commitment_stats.total_fee_sat, info.fee / 1000);
2941 if msg.htlc_signatures.len() != commitment_stats.num_nondust_htlcs {
2942 return Err((None, ChannelError::Close(format!("Got wrong number of HTLC signatures ({}) from remote. It must be {}", msg.htlc_signatures.len(), commitment_stats.num_nondust_htlcs))));
2945 // TODO: Sadly, we pass HTLCs twice to ChannelMonitor: once via the HolderCommitmentTransaction and once via the update
2946 let mut htlcs_and_sigs = Vec::with_capacity(htlcs_cloned.len());
2947 for (idx, (htlc, source)) in htlcs_cloned.drain(..).enumerate() {
2948 if let Some(_) = htlc.transaction_output_index {
2949 let htlc_tx = chan_utils::build_htlc_transaction(&commitment_txid, commitment_stats.feerate_per_kw,
2950 self.get_counterparty_selected_contest_delay().unwrap(), &htlc, self.opt_anchors(),
2951 &keys.broadcaster_delayed_payment_key, &keys.revocation_key);
2953 let htlc_redeemscript = chan_utils::get_htlc_redeemscript(&htlc, self.opt_anchors(), &keys);
2954 let htlc_sighashtype = if self.opt_anchors() { EcdsaSighashType::SinglePlusAnyoneCanPay } else { EcdsaSighashType::All };
2955 let htlc_sighash = hash_to_message!(&sighash::SighashCache::new(&htlc_tx).segwit_signature_hash(0, &htlc_redeemscript, htlc.amount_msat / 1000, htlc_sighashtype).unwrap()[..]);
2956 log_trace!(logger, "Checking HTLC tx signature {} by key {} against tx {} (sighash {}) with redeemscript {} in channel {}.",
2957 log_bytes!(msg.htlc_signatures[idx].serialize_compact()[..]), log_bytes!(keys.countersignatory_htlc_key.serialize()),
2958 encode::serialize_hex(&htlc_tx), log_bytes!(htlc_sighash[..]), encode::serialize_hex(&htlc_redeemscript), log_bytes!(self.channel_id()));
2959 if let Err(_) = self.secp_ctx.verify_ecdsa(&htlc_sighash, &msg.htlc_signatures[idx], &keys.countersignatory_htlc_key) {
2960 return Err((None, ChannelError::Close("Invalid HTLC tx signature from peer".to_owned())));
2962 htlcs_and_sigs.push((htlc, Some(msg.htlc_signatures[idx]), source));
2964 htlcs_and_sigs.push((htlc, None, source));
2968 let holder_commitment_tx = HolderCommitmentTransaction::new(
2969 commitment_stats.tx,
2971 msg.htlc_signatures.clone(),
2972 &self.get_holder_pubkeys().funding_pubkey,
2973 self.counterparty_funding_pubkey()
2976 let next_per_commitment_point = self.holder_signer.get_per_commitment_point(self.cur_holder_commitment_transaction_number - 1, &self.secp_ctx);
2977 self.holder_signer.validate_holder_commitment(&holder_commitment_tx, commitment_stats.preimages)
2978 .map_err(|_| (None, ChannelError::Close("Failed to validate our commitment".to_owned())))?;
2979 let per_commitment_secret = self.holder_signer.release_commitment_secret(self.cur_holder_commitment_transaction_number + 1);
2981 // Update state now that we've passed all the can-fail calls...
2982 let mut need_commitment = false;
2983 if let &mut Some((_, ref mut update_state)) = &mut self.pending_update_fee {
2984 if *update_state == FeeUpdateState::RemoteAnnounced {
2985 *update_state = FeeUpdateState::AwaitingRemoteRevokeToAnnounce;
2986 need_commitment = true;
2990 self.latest_monitor_update_id += 1;
2991 let mut monitor_update = ChannelMonitorUpdate {
2992 update_id: self.latest_monitor_update_id,
2993 updates: vec![ChannelMonitorUpdateStep::LatestHolderCommitmentTXInfo {
2994 commitment_tx: holder_commitment_tx,
2995 htlc_outputs: htlcs_and_sigs
2999 for htlc in self.pending_inbound_htlcs.iter_mut() {
3000 let new_forward = if let &InboundHTLCState::RemoteAnnounced(ref forward_info) = &htlc.state {
3001 Some(forward_info.clone())
3003 if let Some(forward_info) = new_forward {
3004 log_trace!(logger, "Updating HTLC {} to AwaitingRemoteRevokeToAnnounce due to commitment_signed in channel {}.",
3005 log_bytes!(htlc.payment_hash.0), log_bytes!(self.channel_id));
3006 htlc.state = InboundHTLCState::AwaitingRemoteRevokeToAnnounce(forward_info);
3007 need_commitment = true;
3010 for htlc in self.pending_outbound_htlcs.iter_mut() {
3011 if let &mut OutboundHTLCState::RemoteRemoved(ref mut outcome) = &mut htlc.state {
3012 log_trace!(logger, "Updating HTLC {} to AwaitingRemoteRevokeToRemove due to commitment_signed in channel {}.",
3013 log_bytes!(htlc.payment_hash.0), log_bytes!(self.channel_id));
3014 // Grab the preimage, if it exists, instead of cloning
3015 let mut reason = OutboundHTLCOutcome::Success(None);
3016 mem::swap(outcome, &mut reason);
3017 htlc.state = OutboundHTLCState::AwaitingRemoteRevokeToRemove(reason);
3018 need_commitment = true;
3022 self.cur_holder_commitment_transaction_number -= 1;
3023 // Note that if we need_commitment & !AwaitingRemoteRevoke we'll call
3024 // send_commitment_no_status_check() next which will reset this to RAAFirst.
3025 self.resend_order = RAACommitmentOrder::CommitmentFirst;
3027 if (self.channel_state & ChannelState::MonitorUpdateFailed as u32) != 0 {
3028 // In case we initially failed monitor updating without requiring a response, we need
3029 // to make sure the RAA gets sent first.
3030 self.monitor_pending_revoke_and_ack = true;
3031 if need_commitment && (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32)) == 0 {
3032 // If we were going to send a commitment_signed after the RAA, go ahead and do all
3033 // the corresponding HTLC status updates so that get_last_commitment_update
3034 // includes the right HTLCs.
3035 self.monitor_pending_commitment_signed = true;
3036 let (_, mut additional_update) = self.send_commitment_no_status_check(logger).map_err(|e| (None, e))?;
3037 // send_commitment_no_status_check may bump latest_monitor_id but we want them to be
3038 // strictly increasing by one, so decrement it here.
3039 self.latest_monitor_update_id = monitor_update.update_id;
3040 monitor_update.updates.append(&mut additional_update.updates);
3042 log_debug!(logger, "Received valid commitment_signed from peer in channel {}, updated HTLC state but awaiting a monitor update resolution to reply.",
3043 log_bytes!(self.channel_id));
3044 return Err((Some(monitor_update), ChannelError::Ignore("Previous monitor update failure prevented generation of RAA".to_owned())));
3047 let commitment_signed = if need_commitment && (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32)) == 0 {
3048 // If we're AwaitingRemoteRevoke we can't send a new commitment here, but that's ok -
3049 // we'll send one right away when we get the revoke_and_ack when we
3050 // free_holding_cell_htlcs().
3051 let (msg, mut additional_update) = self.send_commitment_no_status_check(logger).map_err(|e| (None, e))?;
3052 // send_commitment_no_status_check may bump latest_monitor_id but we want them to be
3053 // strictly increasing by one, so decrement it here.
3054 self.latest_monitor_update_id = monitor_update.update_id;
3055 monitor_update.updates.append(&mut additional_update.updates);
3059 log_debug!(logger, "Received valid commitment_signed from peer in channel {}, updating HTLC state and responding with{} a revoke_and_ack.",
3060 log_bytes!(self.channel_id()), if commitment_signed.is_some() { " our own commitment_signed and" } else { "" });
3062 Ok((msgs::RevokeAndACK {
3063 channel_id: self.channel_id,
3064 per_commitment_secret,
3065 next_per_commitment_point,
3066 }, commitment_signed, monitor_update))
3069 /// Public version of the below, checking relevant preconditions first.
3070 /// If we're not in a state where freeing the holding cell makes sense, this is a no-op and
3071 /// returns `(None, Vec::new())`.
3072 pub fn maybe_free_holding_cell_htlcs<L: Deref>(&mut self, logger: &L) -> Result<(Option<(msgs::CommitmentUpdate, ChannelMonitorUpdate)>, Vec<(HTLCSource, PaymentHash)>), ChannelError> where L::Target: Logger {
3073 if self.channel_state >= ChannelState::ChannelFunded as u32 &&
3074 (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32 | ChannelState::PeerDisconnected as u32 | ChannelState::MonitorUpdateFailed as u32)) == 0 {
3075 self.free_holding_cell_htlcs(logger)
3076 } else { Ok((None, Vec::new())) }
3079 /// Used to fulfill holding_cell_htlcs when we get a remote ack (or implicitly get it by them
3080 /// fulfilling or failing the last pending HTLC)
3081 fn free_holding_cell_htlcs<L: Deref>(&mut self, logger: &L) -> Result<(Option<(msgs::CommitmentUpdate, ChannelMonitorUpdate)>, Vec<(HTLCSource, PaymentHash)>), ChannelError> where L::Target: Logger {
3082 assert_eq!(self.channel_state & ChannelState::MonitorUpdateFailed as u32, 0);
3083 if self.holding_cell_htlc_updates.len() != 0 || self.holding_cell_update_fee.is_some() {
3084 log_trace!(logger, "Freeing holding cell with {} HTLC updates{} in channel {}", self.holding_cell_htlc_updates.len(),
3085 if self.holding_cell_update_fee.is_some() { " and a fee update" } else { "" }, log_bytes!(self.channel_id()));
3087 let mut monitor_update = ChannelMonitorUpdate {
3088 update_id: self.latest_monitor_update_id + 1, // We don't increment this yet!
3089 updates: Vec::new(),
3092 let mut htlc_updates = Vec::new();
3093 mem::swap(&mut htlc_updates, &mut self.holding_cell_htlc_updates);
3094 let mut update_add_htlcs = Vec::with_capacity(htlc_updates.len());
3095 let mut update_fulfill_htlcs = Vec::with_capacity(htlc_updates.len());
3096 let mut update_fail_htlcs = Vec::with_capacity(htlc_updates.len());
3097 let mut htlcs_to_fail = Vec::new();
3098 for htlc_update in htlc_updates.drain(..) {
3099 // Note that this *can* fail, though it should be due to rather-rare conditions on
3100 // fee races with adding too many outputs which push our total payments just over
3101 // the limit. In case it's less rare than I anticipate, we may want to revisit
3102 // handling this case better and maybe fulfilling some of the HTLCs while attempting
3103 // to rebalance channels.
3104 match &htlc_update {
3105 &HTLCUpdateAwaitingACK::AddHTLC {amount_msat, cltv_expiry, ref payment_hash, ref source, ref onion_routing_packet, ..} => {
3106 match self.send_htlc(amount_msat, *payment_hash, cltv_expiry, source.clone(), onion_routing_packet.clone(), logger) {
3107 Ok(update_add_msg_option) => update_add_htlcs.push(update_add_msg_option.unwrap()),
3110 ChannelError::Ignore(ref msg) => {
3111 log_info!(logger, "Failed to send HTLC with payment_hash {} due to {} in channel {}",
3112 log_bytes!(payment_hash.0), msg, log_bytes!(self.channel_id()));
3113 // If we fail to send here, then this HTLC should
3114 // be failed backwards. Failing to send here
3115 // indicates that this HTLC may keep being put back
3116 // into the holding cell without ever being
3117 // successfully forwarded/failed/fulfilled, causing
3118 // our counterparty to eventually close on us.
3119 htlcs_to_fail.push((source.clone(), *payment_hash));
3122 panic!("Got a non-IgnoreError action trying to send holding cell HTLC");
3128 &HTLCUpdateAwaitingACK::ClaimHTLC { ref payment_preimage, htlc_id, .. } => {
3129 // If an HTLC claim was previously added to the holding cell (via
3130 // `get_update_fulfill_htlc`, then generating the claim message itself must
3131 // not fail - any in between attempts to claim the HTLC will have resulted
3132 // in it hitting the holding cell again and we cannot change the state of a
3133 // holding cell HTLC from fulfill to anything else.
3134 let (update_fulfill_msg_option, mut additional_monitor_update) =
3135 if let UpdateFulfillFetch::NewClaim { msg, monitor_update, .. } = self.get_update_fulfill_htlc(htlc_id, *payment_preimage, logger) {
3136 (msg, monitor_update)
3137 } else { unreachable!() };
3138 update_fulfill_htlcs.push(update_fulfill_msg_option.unwrap());
3139 monitor_update.updates.append(&mut additional_monitor_update.updates);
3141 &HTLCUpdateAwaitingACK::FailHTLC { htlc_id, ref err_packet } => {
3142 match self.get_update_fail_htlc(htlc_id, err_packet.clone(), logger) {
3143 Ok(update_fail_msg_option) => {
3144 // If an HTLC failure was previously added to the holding cell (via
3145 // `get_update_fail_htlc`) then generating the fail message itself
3146 // must not fail - we should never end up in a state where we
3147 // double-fail an HTLC or fail-then-claim an HTLC as it indicates
3148 // we didn't wait for a full revocation before failing.
3149 update_fail_htlcs.push(update_fail_msg_option.unwrap())
3152 if let ChannelError::Ignore(_) = e {}
3154 panic!("Got a non-IgnoreError action trying to fail holding cell HTLC");
3161 if update_add_htlcs.is_empty() && update_fulfill_htlcs.is_empty() && update_fail_htlcs.is_empty() && self.holding_cell_update_fee.is_none() {
3162 return Ok((None, htlcs_to_fail));
3164 let update_fee = if let Some(feerate) = self.holding_cell_update_fee.take() {
3165 self.send_update_fee(feerate, logger)
3170 let (commitment_signed, mut additional_update) = self.send_commitment_no_status_check(logger)?;
3171 // send_commitment_no_status_check and get_update_fulfill_htlc may bump latest_monitor_id
3172 // but we want them to be strictly increasing by one, so reset it here.
3173 self.latest_monitor_update_id = monitor_update.update_id;
3174 monitor_update.updates.append(&mut additional_update.updates);
3176 log_debug!(logger, "Freeing holding cell in channel {} resulted in {}{} HTLCs added, {} HTLCs fulfilled, and {} HTLCs failed.",
3177 log_bytes!(self.channel_id()), if update_fee.is_some() { "a fee update, " } else { "" },
3178 update_add_htlcs.len(), update_fulfill_htlcs.len(), update_fail_htlcs.len());
3180 Ok((Some((msgs::CommitmentUpdate {
3182 update_fulfill_htlcs,
3184 update_fail_malformed_htlcs: Vec::new(),
3187 }, monitor_update)), htlcs_to_fail))
3189 Ok((None, Vec::new()))
3193 /// Handles receiving a remote's revoke_and_ack. Note that we may return a new
3194 /// commitment_signed message here in case we had pending outbound HTLCs to add which were
3195 /// waiting on this revoke_and_ack. The generation of this new commitment_signed may also fail,
3196 /// generating an appropriate error *after* the channel state has been updated based on the
3197 /// revoke_and_ack message.
3198 pub fn revoke_and_ack<L: Deref>(&mut self, msg: &msgs::RevokeAndACK, logger: &L) -> Result<RAAUpdates, ChannelError>
3199 where L::Target: Logger,
3201 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
3202 return Err(ChannelError::Close("Got revoke/ACK message when channel was not in an operational state".to_owned()));
3204 if self.channel_state & (ChannelState::PeerDisconnected as u32) == ChannelState::PeerDisconnected as u32 {
3205 return Err(ChannelError::Close("Peer sent revoke_and_ack when we needed a channel_reestablish".to_owned()));
3207 if self.channel_state & BOTH_SIDES_SHUTDOWN_MASK == BOTH_SIDES_SHUTDOWN_MASK && self.last_sent_closing_fee.is_some() {
3208 return Err(ChannelError::Close("Peer sent revoke_and_ack after we'd started exchanging closing_signeds".to_owned()));
3211 let secret = secp_check!(SecretKey::from_slice(&msg.per_commitment_secret), "Peer provided an invalid per_commitment_secret".to_owned());
3213 if let Some(counterparty_prev_commitment_point) = self.counterparty_prev_commitment_point {
3214 if PublicKey::from_secret_key(&self.secp_ctx, &secret) != counterparty_prev_commitment_point {
3215 return Err(ChannelError::Close("Got a revoke commitment secret which didn't correspond to their current pubkey".to_owned()));
3219 if self.channel_state & ChannelState::AwaitingRemoteRevoke as u32 == 0 {
3220 // Our counterparty seems to have burned their coins to us (by revoking a state when we
3221 // haven't given them a new commitment transaction to broadcast). We should probably
3222 // take advantage of this by updating our channel monitor, sending them an error, and
3223 // waiting for them to broadcast their latest (now-revoked claim). But, that would be a
3224 // lot of work, and there's some chance this is all a misunderstanding anyway.
3225 // We have to do *something*, though, since our signer may get mad at us for otherwise
3226 // jumping a remote commitment number, so best to just force-close and move on.
3227 return Err(ChannelError::Close("Received an unexpected revoke_and_ack".to_owned()));
3230 #[cfg(any(test, fuzzing))]
3232 *self.next_local_commitment_tx_fee_info_cached.lock().unwrap() = None;
3233 *self.next_remote_commitment_tx_fee_info_cached.lock().unwrap() = None;
3236 self.holder_signer.validate_counterparty_revocation(
3237 self.cur_counterparty_commitment_transaction_number + 1,
3239 ).map_err(|_| ChannelError::Close("Failed to validate revocation from peer".to_owned()))?;
3241 self.commitment_secrets.provide_secret(self.cur_counterparty_commitment_transaction_number + 1, msg.per_commitment_secret)
3242 .map_err(|_| ChannelError::Close("Previous secrets did not match new one".to_owned()))?;
3243 self.latest_monitor_update_id += 1;
3244 let mut monitor_update = ChannelMonitorUpdate {
3245 update_id: self.latest_monitor_update_id,
3246 updates: vec![ChannelMonitorUpdateStep::CommitmentSecret {
3247 idx: self.cur_counterparty_commitment_transaction_number + 1,
3248 secret: msg.per_commitment_secret,
3252 // Update state now that we've passed all the can-fail calls...
3253 // (note that we may still fail to generate the new commitment_signed message, but that's
3254 // OK, we step the channel here and *then* if the new generation fails we can fail the
3255 // channel based on that, but stepping stuff here should be safe either way.
3256 self.channel_state &= !(ChannelState::AwaitingRemoteRevoke as u32);
3257 self.counterparty_prev_commitment_point = self.counterparty_cur_commitment_point;
3258 self.counterparty_cur_commitment_point = Some(msg.next_per_commitment_point);
3259 self.cur_counterparty_commitment_transaction_number -= 1;
3261 if self.announcement_sigs_state == AnnouncementSigsState::Committed {
3262 self.announcement_sigs_state = AnnouncementSigsState::PeerReceived;
3265 log_trace!(logger, "Updating HTLCs on receipt of RAA in channel {}...", log_bytes!(self.channel_id()));
3266 let mut to_forward_infos = Vec::new();
3267 let mut revoked_htlcs = Vec::new();
3268 let mut finalized_claimed_htlcs = Vec::new();
3269 let mut update_fail_htlcs = Vec::new();
3270 let mut update_fail_malformed_htlcs = Vec::new();
3271 let mut require_commitment = false;
3272 let mut value_to_self_msat_diff: i64 = 0;
3275 // Take references explicitly so that we can hold multiple references to self.
3276 let pending_inbound_htlcs: &mut Vec<_> = &mut self.pending_inbound_htlcs;
3277 let pending_outbound_htlcs: &mut Vec<_> = &mut self.pending_outbound_htlcs;
3279 // We really shouldnt have two passes here, but retain gives a non-mutable ref (Rust bug)
3280 pending_inbound_htlcs.retain(|htlc| {
3281 if let &InboundHTLCState::LocalRemoved(ref reason) = &htlc.state {
3282 log_trace!(logger, " ...removing inbound LocalRemoved {}", log_bytes!(htlc.payment_hash.0));
3283 if let &InboundHTLCRemovalReason::Fulfill(_) = reason {
3284 value_to_self_msat_diff += htlc.amount_msat as i64;
3289 pending_outbound_htlcs.retain(|htlc| {
3290 if let &OutboundHTLCState::AwaitingRemovedRemoteRevoke(ref outcome) = &htlc.state {
3291 log_trace!(logger, " ...removing outbound AwaitingRemovedRemoteRevoke {}", log_bytes!(htlc.payment_hash.0));
3292 if let OutboundHTLCOutcome::Failure(reason) = outcome.clone() { // We really want take() here, but, again, non-mut ref :(
3293 revoked_htlcs.push((htlc.source.clone(), htlc.payment_hash, reason));
3295 finalized_claimed_htlcs.push(htlc.source.clone());
3296 // They fulfilled, so we sent them money
3297 value_to_self_msat_diff -= htlc.amount_msat as i64;
3302 for htlc in pending_inbound_htlcs.iter_mut() {
3303 let swap = if let &InboundHTLCState::AwaitingRemoteRevokeToAnnounce(_) = &htlc.state {
3305 } else if let &InboundHTLCState::AwaitingAnnouncedRemoteRevoke(_) = &htlc.state {
3309 let mut state = InboundHTLCState::Committed;
3310 mem::swap(&mut state, &mut htlc.state);
3312 if let InboundHTLCState::AwaitingRemoteRevokeToAnnounce(forward_info) = state {
3313 log_trace!(logger, " ...promoting inbound AwaitingRemoteRevokeToAnnounce {} to AwaitingAnnouncedRemoteRevoke", log_bytes!(htlc.payment_hash.0));
3314 htlc.state = InboundHTLCState::AwaitingAnnouncedRemoteRevoke(forward_info);
3315 require_commitment = true;
3316 } else if let InboundHTLCState::AwaitingAnnouncedRemoteRevoke(forward_info) = state {
3317 match forward_info {
3318 PendingHTLCStatus::Fail(fail_msg) => {
3319 log_trace!(logger, " ...promoting inbound AwaitingAnnouncedRemoteRevoke {} to LocalRemoved due to PendingHTLCStatus indicating failure", log_bytes!(htlc.payment_hash.0));
3320 require_commitment = true;
3322 HTLCFailureMsg::Relay(msg) => {
3323 htlc.state = InboundHTLCState::LocalRemoved(InboundHTLCRemovalReason::FailRelay(msg.reason.clone()));
3324 update_fail_htlcs.push(msg)
3326 HTLCFailureMsg::Malformed(msg) => {
3327 htlc.state = InboundHTLCState::LocalRemoved(InboundHTLCRemovalReason::FailMalformed((msg.sha256_of_onion, msg.failure_code)));
3328 update_fail_malformed_htlcs.push(msg)
3332 PendingHTLCStatus::Forward(forward_info) => {
3333 log_trace!(logger, " ...promoting inbound AwaitingAnnouncedRemoteRevoke {} to Committed", log_bytes!(htlc.payment_hash.0));
3334 to_forward_infos.push((forward_info, htlc.htlc_id));
3335 htlc.state = InboundHTLCState::Committed;
3341 for htlc in pending_outbound_htlcs.iter_mut() {
3342 if let OutboundHTLCState::LocalAnnounced(_) = htlc.state {
3343 log_trace!(logger, " ...promoting outbound LocalAnnounced {} to Committed", log_bytes!(htlc.payment_hash.0));
3344 htlc.state = OutboundHTLCState::Committed;
3346 if let &mut OutboundHTLCState::AwaitingRemoteRevokeToRemove(ref mut outcome) = &mut htlc.state {
3347 log_trace!(logger, " ...promoting outbound AwaitingRemoteRevokeToRemove {} to AwaitingRemovedRemoteRevoke", log_bytes!(htlc.payment_hash.0));
3348 // Grab the preimage, if it exists, instead of cloning
3349 let mut reason = OutboundHTLCOutcome::Success(None);
3350 mem::swap(outcome, &mut reason);
3351 htlc.state = OutboundHTLCState::AwaitingRemovedRemoteRevoke(reason);
3352 require_commitment = true;
3356 self.value_to_self_msat = (self.value_to_self_msat as i64 + value_to_self_msat_diff) as u64;
3358 if let Some((feerate, update_state)) = self.pending_update_fee {
3359 match update_state {
3360 FeeUpdateState::Outbound => {
3361 debug_assert!(self.is_outbound());
3362 log_trace!(logger, " ...promoting outbound fee update {} to Committed", feerate);
3363 self.feerate_per_kw = feerate;
3364 self.pending_update_fee = None;
3366 FeeUpdateState::RemoteAnnounced => { debug_assert!(!self.is_outbound()); },
3367 FeeUpdateState::AwaitingRemoteRevokeToAnnounce => {
3368 debug_assert!(!self.is_outbound());
3369 log_trace!(logger, " ...promoting inbound AwaitingRemoteRevokeToAnnounce fee update {} to Committed", feerate);
3370 require_commitment = true;
3371 self.feerate_per_kw = feerate;
3372 self.pending_update_fee = None;
3377 if (self.channel_state & ChannelState::MonitorUpdateFailed as u32) == ChannelState::MonitorUpdateFailed as u32 {
3378 // We can't actually generate a new commitment transaction (incl by freeing holding
3379 // cells) while we can't update the monitor, so we just return what we have.
3380 if require_commitment {
3381 self.monitor_pending_commitment_signed = true;
3382 // When the monitor updating is restored we'll call get_last_commitment_update(),
3383 // which does not update state, but we're definitely now awaiting a remote revoke
3384 // before we can step forward any more, so set it here.
3385 let (_, mut additional_update) = self.send_commitment_no_status_check(logger)?;
3386 // send_commitment_no_status_check may bump latest_monitor_id but we want them to be
3387 // strictly increasing by one, so decrement it here.
3388 self.latest_monitor_update_id = monitor_update.update_id;
3389 monitor_update.updates.append(&mut additional_update.updates);
3391 self.monitor_pending_forwards.append(&mut to_forward_infos);
3392 self.monitor_pending_failures.append(&mut revoked_htlcs);
3393 self.monitor_pending_finalized_fulfills.append(&mut finalized_claimed_htlcs);
3394 log_debug!(logger, "Received a valid revoke_and_ack for channel {} but awaiting a monitor update resolution to reply.", log_bytes!(self.channel_id()));
3395 return Ok(RAAUpdates {
3396 commitment_update: None, finalized_claimed_htlcs: Vec::new(),
3397 accepted_htlcs: Vec::new(), failed_htlcs: Vec::new(),
3399 holding_cell_failed_htlcs: Vec::new()
3403 match self.free_holding_cell_htlcs(logger)? {
3404 (Some((mut commitment_update, mut additional_update)), htlcs_to_fail) => {
3405 commitment_update.update_fail_htlcs.reserve(update_fail_htlcs.len());
3406 for fail_msg in update_fail_htlcs.drain(..) {
3407 commitment_update.update_fail_htlcs.push(fail_msg);
3409 commitment_update.update_fail_malformed_htlcs.reserve(update_fail_malformed_htlcs.len());
3410 for fail_msg in update_fail_malformed_htlcs.drain(..) {
3411 commitment_update.update_fail_malformed_htlcs.push(fail_msg);
3414 // free_holding_cell_htlcs may bump latest_monitor_id multiple times but we want them to be
3415 // strictly increasing by one, so decrement it here.
3416 self.latest_monitor_update_id = monitor_update.update_id;
3417 monitor_update.updates.append(&mut additional_update.updates);
3420 commitment_update: Some(commitment_update),
3421 finalized_claimed_htlcs,
3422 accepted_htlcs: to_forward_infos,
3423 failed_htlcs: revoked_htlcs,
3425 holding_cell_failed_htlcs: htlcs_to_fail
3428 (None, htlcs_to_fail) => {
3429 if require_commitment {
3430 let (commitment_signed, mut additional_update) = self.send_commitment_no_status_check(logger)?;
3432 // send_commitment_no_status_check may bump latest_monitor_id but we want them to be
3433 // strictly increasing by one, so decrement it here.
3434 self.latest_monitor_update_id = monitor_update.update_id;
3435 monitor_update.updates.append(&mut additional_update.updates);
3437 log_debug!(logger, "Received a valid revoke_and_ack for channel {}. Responding with a commitment update with {} HTLCs failed.",
3438 log_bytes!(self.channel_id()), update_fail_htlcs.len() + update_fail_malformed_htlcs.len());
3440 commitment_update: Some(msgs::CommitmentUpdate {
3441 update_add_htlcs: Vec::new(),
3442 update_fulfill_htlcs: Vec::new(),
3444 update_fail_malformed_htlcs,
3448 finalized_claimed_htlcs,
3449 accepted_htlcs: to_forward_infos, failed_htlcs: revoked_htlcs,
3450 monitor_update, holding_cell_failed_htlcs: htlcs_to_fail
3453 log_debug!(logger, "Received a valid revoke_and_ack for channel {} with no reply necessary.", log_bytes!(self.channel_id()));
3455 commitment_update: None,
3456 finalized_claimed_htlcs,
3457 accepted_htlcs: to_forward_infos, failed_htlcs: revoked_htlcs,
3458 monitor_update, holding_cell_failed_htlcs: htlcs_to_fail
3465 /// Adds a pending update to this channel. See the doc for send_htlc for
3466 /// further details on the optionness of the return value.
3467 /// If our balance is too low to cover the cost of the next commitment transaction at the
3468 /// new feerate, the update is cancelled.
3469 /// You MUST call send_commitment prior to any other calls on this Channel
3470 fn send_update_fee<L: Deref>(&mut self, feerate_per_kw: u32, logger: &L) -> Option<msgs::UpdateFee> where L::Target: Logger {
3471 if !self.is_outbound() {
3472 panic!("Cannot send fee from inbound channel");
3474 if !self.is_usable() {
3475 panic!("Cannot update fee until channel is fully established and we haven't started shutting down");
3477 if !self.is_live() {
3478 panic!("Cannot update fee while peer is disconnected/we're awaiting a monitor update (ChannelManager should have caught this)");
3481 // Before proposing a feerate update, check that we can actually afford the new fee.
3482 let inbound_stats = self.get_inbound_pending_htlc_stats(Some(feerate_per_kw));
3483 let outbound_stats = self.get_outbound_pending_htlc_stats(Some(feerate_per_kw));
3484 let keys = if let Ok(keys) = self.build_holder_transaction_keys(self.cur_holder_commitment_transaction_number) { keys } else { return None; };
3485 let commitment_stats = self.build_commitment_transaction(self.cur_holder_commitment_transaction_number, &keys, true, true, logger);
3486 let buffer_fee_msat = Channel::<Signer>::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.opt_anchors()) * 1000;
3487 let holder_balance_msat = commitment_stats.local_balance_msat - outbound_stats.holding_cell_msat;
3488 if holder_balance_msat < buffer_fee_msat + self.counterparty_selected_channel_reserve_satoshis.unwrap() * 1000 {
3489 //TODO: auto-close after a number of failures?
3490 log_debug!(logger, "Cannot afford to send new feerate at {}", feerate_per_kw);
3494 // Note, we evaluate pending htlc "preemptive" trimmed-to-dust threshold at the proposed `feerate_per_kw`.
3495 let holder_tx_dust_exposure = inbound_stats.on_holder_tx_dust_exposure_msat + outbound_stats.on_holder_tx_dust_exposure_msat;
3496 let counterparty_tx_dust_exposure = inbound_stats.on_counterparty_tx_dust_exposure_msat + outbound_stats.on_counterparty_tx_dust_exposure_msat;
3497 if holder_tx_dust_exposure > self.get_max_dust_htlc_exposure_msat() {
3498 log_debug!(logger, "Cannot afford to send new feerate at {} without infringing max dust htlc exposure", feerate_per_kw);
3501 if counterparty_tx_dust_exposure > self.get_max_dust_htlc_exposure_msat() {
3502 log_debug!(logger, "Cannot afford to send new feerate at {} without infringing max dust htlc exposure", feerate_per_kw);
3506 if (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32 | ChannelState::MonitorUpdateFailed as u32)) != 0 {
3507 self.holding_cell_update_fee = Some(feerate_per_kw);
3511 debug_assert!(self.pending_update_fee.is_none());
3512 self.pending_update_fee = Some((feerate_per_kw, FeeUpdateState::Outbound));
3514 Some(msgs::UpdateFee {
3515 channel_id: self.channel_id,
3520 pub fn send_update_fee_and_commit<L: Deref>(&mut self, feerate_per_kw: u32, logger: &L) -> Result<Option<(msgs::UpdateFee, msgs::CommitmentSigned, ChannelMonitorUpdate)>, ChannelError> where L::Target: Logger {
3521 match self.send_update_fee(feerate_per_kw, logger) {
3522 Some(update_fee) => {
3523 let (commitment_signed, monitor_update) = self.send_commitment_no_status_check(logger)?;
3524 Ok(Some((update_fee, commitment_signed, monitor_update)))
3530 /// Removes any uncommitted inbound HTLCs and resets the state of uncommitted outbound HTLC
3531 /// updates, to be used on peer disconnection. After this, update_*_htlc messages need to be
3533 /// No further message handling calls may be made until a channel_reestablish dance has
3535 pub fn remove_uncommitted_htlcs_and_mark_paused<L: Deref>(&mut self, logger: &L) where L::Target: Logger {
3536 assert_eq!(self.channel_state & ChannelState::ShutdownComplete as u32, 0);
3537 if self.channel_state < ChannelState::FundingSent as u32 {
3538 self.channel_state = ChannelState::ShutdownComplete as u32;
3542 if self.announcement_sigs_state == AnnouncementSigsState::MessageSent || self.announcement_sigs_state == AnnouncementSigsState::Committed {
3543 self.announcement_sigs_state = AnnouncementSigsState::NotSent;
3546 // Upon reconnect we have to start the closing_signed dance over, but shutdown messages
3547 // will be retransmitted.
3548 self.last_sent_closing_fee = None;
3549 self.pending_counterparty_closing_signed = None;
3550 self.closing_fee_limits = None;
3552 let mut inbound_drop_count = 0;
3553 self.pending_inbound_htlcs.retain(|htlc| {
3555 InboundHTLCState::RemoteAnnounced(_) => {
3556 // They sent us an update_add_htlc but we never got the commitment_signed.
3557 // We'll tell them what commitment_signed we're expecting next and they'll drop
3558 // this HTLC accordingly
3559 inbound_drop_count += 1;
3562 InboundHTLCState::AwaitingRemoteRevokeToAnnounce(_)|InboundHTLCState::AwaitingAnnouncedRemoteRevoke(_) => {
3563 // We received a commitment_signed updating this HTLC and (at least hopefully)
3564 // sent a revoke_and_ack (which we can re-transmit) and have heard nothing
3565 // in response to it yet, so don't touch it.
3568 InboundHTLCState::Committed => true,
3569 InboundHTLCState::LocalRemoved(_) => {
3570 // We (hopefully) sent a commitment_signed updating this HTLC (which we can
3571 // re-transmit if needed) and they may have even sent a revoke_and_ack back
3572 // (that we missed). Keep this around for now and if they tell us they missed
3573 // the commitment_signed we can re-transmit the update then.
3578 self.next_counterparty_htlc_id -= inbound_drop_count;
3580 if let Some((_, update_state)) = self.pending_update_fee {
3581 if update_state == FeeUpdateState::RemoteAnnounced {
3582 debug_assert!(!self.is_outbound());
3583 self.pending_update_fee = None;
3587 for htlc in self.pending_outbound_htlcs.iter_mut() {
3588 if let OutboundHTLCState::RemoteRemoved(_) = htlc.state {
3589 // They sent us an update to remove this but haven't yet sent the corresponding
3590 // commitment_signed, we need to move it back to Committed and they can re-send
3591 // the update upon reconnection.
3592 htlc.state = OutboundHTLCState::Committed;
3596 self.channel_state |= ChannelState::PeerDisconnected as u32;
3597 log_trace!(logger, "Peer disconnection resulted in {} remote-announced HTLC drops on channel {}", inbound_drop_count, log_bytes!(self.channel_id()));
3600 /// Indicates that a ChannelMonitor update failed to be stored by the client and further
3601 /// updates are partially paused.
3602 /// This must be called immediately after the call which generated the ChannelMonitor update
3603 /// which failed. The messages which were generated from that call which generated the
3604 /// monitor update failure must *not* have been sent to the remote end, and must instead
3605 /// have been dropped. They will be regenerated when monitor_updating_restored is called.
3606 pub fn monitor_update_failed(&mut self, resend_raa: bool, resend_commitment: bool,
3607 resend_channel_ready: bool, mut pending_forwards: Vec<(PendingHTLCInfo, u64)>,
3608 mut pending_fails: Vec<(HTLCSource, PaymentHash, HTLCFailReason)>,
3609 mut pending_finalized_claimed_htlcs: Vec<HTLCSource>
3611 self.monitor_pending_revoke_and_ack |= resend_raa;
3612 self.monitor_pending_commitment_signed |= resend_commitment;
3613 self.monitor_pending_channel_ready |= resend_channel_ready;
3614 self.monitor_pending_forwards.append(&mut pending_forwards);
3615 self.monitor_pending_failures.append(&mut pending_fails);
3616 self.monitor_pending_finalized_fulfills.append(&mut pending_finalized_claimed_htlcs);
3617 self.channel_state |= ChannelState::MonitorUpdateFailed as u32;
3620 /// Indicates that the latest ChannelMonitor update has been committed by the client
3621 /// successfully and we should restore normal operation. Returns messages which should be sent
3622 /// to the remote side.
3623 pub fn monitor_updating_restored<L: Deref>(&mut self, logger: &L, node_pk: PublicKey, genesis_block_hash: BlockHash, best_block_height: u32) -> MonitorRestoreUpdates where L::Target: Logger {
3624 assert_eq!(self.channel_state & ChannelState::MonitorUpdateFailed as u32, ChannelState::MonitorUpdateFailed as u32);
3625 self.channel_state &= !(ChannelState::MonitorUpdateFailed as u32);
3627 // If we're past (or at) the FundingSent stage on an outbound channel, try to
3628 // (re-)broadcast the funding transaction as we may have declined to broadcast it when we
3629 // first received the funding_signed.
3630 let mut funding_broadcastable =
3631 if self.is_outbound() && self.channel_state & !MULTI_STATE_FLAGS >= ChannelState::FundingSent as u32 {
3632 self.funding_transaction.take()
3634 // That said, if the funding transaction is already confirmed (ie we're active with a
3635 // minimum_depth over 0) don't bother re-broadcasting the confirmed funding tx.
3636 if self.channel_state & !MULTI_STATE_FLAGS >= ChannelState::ChannelFunded as u32 && self.minimum_depth != Some(0) {
3637 funding_broadcastable = None;
3640 // We will never broadcast the funding transaction when we're in MonitorUpdateFailed (and
3641 // we assume the user never directly broadcasts the funding transaction and waits for us to
3642 // do it). Thus, we can only ever hit monitor_pending_channel_ready when we're
3643 // * an inbound channel that failed to persist the monitor on funding_created and we got
3644 // the funding transaction confirmed before the monitor was persisted, or
3645 // * a 0-conf channel and intended to send the channel_ready before any broadcast at all.
3646 let channel_ready = if self.monitor_pending_channel_ready {
3647 assert!(!self.is_outbound() || self.minimum_depth == Some(0),
3648 "Funding transaction broadcast by the local client before it should have - LDK didn't do it!");
3649 self.monitor_pending_channel_ready = false;
3650 let next_per_commitment_point = self.holder_signer.get_per_commitment_point(self.cur_holder_commitment_transaction_number, &self.secp_ctx);
3651 Some(msgs::ChannelReady {
3652 channel_id: self.channel_id(),
3653 next_per_commitment_point,
3654 short_channel_id_alias: Some(self.outbound_scid_alias),
3658 let announcement_sigs = self.get_announcement_sigs(node_pk, genesis_block_hash, best_block_height, logger);
3660 let mut accepted_htlcs = Vec::new();
3661 mem::swap(&mut accepted_htlcs, &mut self.monitor_pending_forwards);
3662 let mut failed_htlcs = Vec::new();
3663 mem::swap(&mut failed_htlcs, &mut self.monitor_pending_failures);
3664 let mut finalized_claimed_htlcs = Vec::new();
3665 mem::swap(&mut finalized_claimed_htlcs, &mut self.monitor_pending_finalized_fulfills);
3667 if self.channel_state & (ChannelState::PeerDisconnected as u32) != 0 {
3668 self.monitor_pending_revoke_and_ack = false;
3669 self.monitor_pending_commitment_signed = false;
3670 return MonitorRestoreUpdates {
3671 raa: None, commitment_update: None, order: RAACommitmentOrder::RevokeAndACKFirst,
3672 accepted_htlcs, failed_htlcs, finalized_claimed_htlcs, funding_broadcastable, channel_ready, announcement_sigs
3676 let raa = if self.monitor_pending_revoke_and_ack {
3677 Some(self.get_last_revoke_and_ack())
3679 let commitment_update = if self.monitor_pending_commitment_signed {
3680 Some(self.get_last_commitment_update(logger))
3683 self.monitor_pending_revoke_and_ack = false;
3684 self.monitor_pending_commitment_signed = false;
3685 let order = self.resend_order.clone();
3686 log_debug!(logger, "Restored monitor updating in channel {} resulting in {}{} commitment update and {} RAA, with {} first",
3687 log_bytes!(self.channel_id()), if funding_broadcastable.is_some() { "a funding broadcastable, " } else { "" },
3688 if commitment_update.is_some() { "a" } else { "no" }, if raa.is_some() { "an" } else { "no" },
3689 match order { RAACommitmentOrder::CommitmentFirst => "commitment", RAACommitmentOrder::RevokeAndACKFirst => "RAA"});
3690 MonitorRestoreUpdates {
3691 raa, commitment_update, order, accepted_htlcs, failed_htlcs, finalized_claimed_htlcs, funding_broadcastable, channel_ready, announcement_sigs
3695 pub fn update_fee<F: Deref>(&mut self, fee_estimator: &F, msg: &msgs::UpdateFee) -> Result<(), ChannelError>
3696 where F::Target: FeeEstimator
3698 if self.is_outbound() {
3699 return Err(ChannelError::Close("Non-funding remote tried to update channel fee".to_owned()));
3701 if self.channel_state & (ChannelState::PeerDisconnected as u32) == ChannelState::PeerDisconnected as u32 {
3702 return Err(ChannelError::Close("Peer sent update_fee when we needed a channel_reestablish".to_owned()));
3704 Channel::<Signer>::check_remote_fee(fee_estimator, msg.feerate_per_kw)?;
3705 let feerate_over_dust_buffer = msg.feerate_per_kw > self.get_dust_buffer_feerate(None);
3707 self.pending_update_fee = Some((msg.feerate_per_kw, FeeUpdateState::RemoteAnnounced));
3708 self.update_time_counter += 1;
3709 // If the feerate has increased over the previous dust buffer (note that
3710 // `get_dust_buffer_feerate` considers the `pending_update_fee` status), check that we
3711 // won't be pushed over our dust exposure limit by the feerate increase.
3712 if feerate_over_dust_buffer {
3713 let inbound_stats = self.get_inbound_pending_htlc_stats(None);
3714 let outbound_stats = self.get_outbound_pending_htlc_stats(None);
3715 let holder_tx_dust_exposure = inbound_stats.on_holder_tx_dust_exposure_msat + outbound_stats.on_holder_tx_dust_exposure_msat;
3716 let counterparty_tx_dust_exposure = inbound_stats.on_counterparty_tx_dust_exposure_msat + outbound_stats.on_counterparty_tx_dust_exposure_msat;
3717 if holder_tx_dust_exposure > self.get_max_dust_htlc_exposure_msat() {
3718 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)",
3719 msg.feerate_per_kw, holder_tx_dust_exposure)));
3721 if counterparty_tx_dust_exposure > self.get_max_dust_htlc_exposure_msat() {
3722 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)",
3723 msg.feerate_per_kw, counterparty_tx_dust_exposure)));
3729 fn get_last_revoke_and_ack(&self) -> msgs::RevokeAndACK {
3730 let next_per_commitment_point = self.holder_signer.get_per_commitment_point(self.cur_holder_commitment_transaction_number, &self.secp_ctx);
3731 let per_commitment_secret = self.holder_signer.release_commitment_secret(self.cur_holder_commitment_transaction_number + 2);
3732 msgs::RevokeAndACK {
3733 channel_id: self.channel_id,
3734 per_commitment_secret,
3735 next_per_commitment_point,
3739 fn get_last_commitment_update<L: Deref>(&self, logger: &L) -> msgs::CommitmentUpdate where L::Target: Logger {
3740 let mut update_add_htlcs = Vec::new();
3741 let mut update_fulfill_htlcs = Vec::new();
3742 let mut update_fail_htlcs = Vec::new();
3743 let mut update_fail_malformed_htlcs = Vec::new();
3745 for htlc in self.pending_outbound_htlcs.iter() {
3746 if let &OutboundHTLCState::LocalAnnounced(ref onion_packet) = &htlc.state {
3747 update_add_htlcs.push(msgs::UpdateAddHTLC {
3748 channel_id: self.channel_id(),
3749 htlc_id: htlc.htlc_id,
3750 amount_msat: htlc.amount_msat,
3751 payment_hash: htlc.payment_hash,
3752 cltv_expiry: htlc.cltv_expiry,
3753 onion_routing_packet: (**onion_packet).clone(),
3758 for htlc in self.pending_inbound_htlcs.iter() {
3759 if let &InboundHTLCState::LocalRemoved(ref reason) = &htlc.state {
3761 &InboundHTLCRemovalReason::FailRelay(ref err_packet) => {
3762 update_fail_htlcs.push(msgs::UpdateFailHTLC {
3763 channel_id: self.channel_id(),
3764 htlc_id: htlc.htlc_id,
3765 reason: err_packet.clone()
3768 &InboundHTLCRemovalReason::FailMalformed((ref sha256_of_onion, ref failure_code)) => {
3769 update_fail_malformed_htlcs.push(msgs::UpdateFailMalformedHTLC {
3770 channel_id: self.channel_id(),
3771 htlc_id: htlc.htlc_id,
3772 sha256_of_onion: sha256_of_onion.clone(),
3773 failure_code: failure_code.clone(),
3776 &InboundHTLCRemovalReason::Fulfill(ref payment_preimage) => {
3777 update_fulfill_htlcs.push(msgs::UpdateFulfillHTLC {
3778 channel_id: self.channel_id(),
3779 htlc_id: htlc.htlc_id,
3780 payment_preimage: payment_preimage.clone(),
3787 let update_fee = if self.is_outbound() && self.pending_update_fee.is_some() {
3788 Some(msgs::UpdateFee {
3789 channel_id: self.channel_id(),
3790 feerate_per_kw: self.pending_update_fee.unwrap().0,
3794 log_trace!(logger, "Regenerated latest commitment update in channel {} with{} {} update_adds, {} update_fulfills, {} update_fails, and {} update_fail_malformeds",
3795 log_bytes!(self.channel_id()), if update_fee.is_some() { " update_fee," } else { "" },
3796 update_add_htlcs.len(), update_fulfill_htlcs.len(), update_fail_htlcs.len(), update_fail_malformed_htlcs.len());
3797 msgs::CommitmentUpdate {
3798 update_add_htlcs, update_fulfill_htlcs, update_fail_htlcs, update_fail_malformed_htlcs, update_fee,
3799 commitment_signed: self.send_commitment_no_state_update(logger).expect("It looks like we failed to re-generate a commitment_signed we had previously sent?").0,
3803 /// May panic if some calls other than message-handling calls (which will all Err immediately)
3804 /// have been called between remove_uncommitted_htlcs_and_mark_paused and this call.
3805 pub fn channel_reestablish<L: Deref>(&mut self, msg: &msgs::ChannelReestablish, logger: &L,
3806 node_pk: PublicKey, genesis_block_hash: BlockHash, best_block: &BestBlock)
3807 -> Result<ReestablishResponses, ChannelError> where L::Target: Logger {
3808 if self.channel_state & (ChannelState::PeerDisconnected as u32) == 0 {
3809 // While BOLT 2 doesn't indicate explicitly we should error this channel here, it
3810 // almost certainly indicates we are going to end up out-of-sync in some way, so we
3811 // just close here instead of trying to recover.
3812 return Err(ChannelError::Close("Peer sent a loose channel_reestablish not after reconnect".to_owned()));
3815 if msg.next_local_commitment_number >= INITIAL_COMMITMENT_NUMBER || msg.next_remote_commitment_number >= INITIAL_COMMITMENT_NUMBER ||
3816 msg.next_local_commitment_number == 0 {
3817 return Err(ChannelError::Close("Peer sent a garbage channel_reestablish".to_owned()));
3820 if msg.next_remote_commitment_number > 0 {
3821 match msg.data_loss_protect {
3822 OptionalField::Present(ref data_loss) => {
3823 let expected_point = self.holder_signer.get_per_commitment_point(INITIAL_COMMITMENT_NUMBER - msg.next_remote_commitment_number + 1, &self.secp_ctx);
3824 let given_secret = SecretKey::from_slice(&data_loss.your_last_per_commitment_secret)
3825 .map_err(|_| ChannelError::Close("Peer sent a garbage channel_reestablish with unparseable secret key".to_owned()))?;
3826 if expected_point != PublicKey::from_secret_key(&self.secp_ctx, &given_secret) {
3827 return Err(ChannelError::Close("Peer sent a garbage channel_reestablish with secret key not matching the commitment height provided".to_owned()));
3829 if msg.next_remote_commitment_number > INITIAL_COMMITMENT_NUMBER - self.cur_holder_commitment_transaction_number {
3830 return Err(ChannelError::CloseDelayBroadcast(
3831 "We have fallen behind - we have received proof that if we broadcast remote is going to claim our funds - we can't do any automated broadcasting".to_owned()
3835 OptionalField::Absent => {}
3839 // Before we change the state of the channel, we check if the peer is sending a very old
3840 // commitment transaction number, if yes we send a warning message.
3841 let our_commitment_transaction = INITIAL_COMMITMENT_NUMBER - self.cur_holder_commitment_transaction_number - 1;
3842 if msg.next_remote_commitment_number + 1 < our_commitment_transaction {
3844 ChannelError::Warn(format!("Peer attempted to reestablish channel with a very old local commitment transaction: {} (received) vs {} (expected)", msg.next_remote_commitment_number, our_commitment_transaction))
3848 // Go ahead and unmark PeerDisconnected as various calls we may make check for it (and all
3849 // remaining cases either succeed or ErrorMessage-fail).
3850 self.channel_state &= !(ChannelState::PeerDisconnected as u32);
3852 let shutdown_msg = if self.channel_state & (ChannelState::LocalShutdownSent as u32) != 0 {
3853 assert!(self.shutdown_scriptpubkey.is_some());
3854 Some(msgs::Shutdown {
3855 channel_id: self.channel_id,
3856 scriptpubkey: self.get_closing_scriptpubkey(),
3860 let announcement_sigs = self.get_announcement_sigs(node_pk, genesis_block_hash, best_block.height(), logger);
3862 if self.channel_state & (ChannelState::FundingSent as u32) == ChannelState::FundingSent as u32 {
3863 // If we're waiting on a monitor update, we shouldn't re-send any channel_ready's.
3864 if self.channel_state & (ChannelState::OurChannelReady as u32) == 0 ||
3865 self.channel_state & (ChannelState::MonitorUpdateFailed as u32) != 0 {
3866 if msg.next_remote_commitment_number != 0 {
3867 return Err(ChannelError::Close("Peer claimed they saw a revoke_and_ack but we haven't sent channel_ready yet".to_owned()));
3869 // Short circuit the whole handler as there is nothing we can resend them
3870 return Ok(ReestablishResponses {
3871 channel_ready: None,
3872 raa: None, commitment_update: None, mon_update: None,
3873 order: RAACommitmentOrder::CommitmentFirst,
3874 holding_cell_failed_htlcs: Vec::new(),
3875 shutdown_msg, announcement_sigs,
3879 // We have OurChannelReady set!
3880 let next_per_commitment_point = self.holder_signer.get_per_commitment_point(self.cur_holder_commitment_transaction_number, &self.secp_ctx);
3881 return Ok(ReestablishResponses {
3882 channel_ready: Some(msgs::ChannelReady {
3883 channel_id: self.channel_id(),
3884 next_per_commitment_point,
3885 short_channel_id_alias: Some(self.outbound_scid_alias),
3887 raa: None, commitment_update: None, mon_update: None,
3888 order: RAACommitmentOrder::CommitmentFirst,
3889 holding_cell_failed_htlcs: Vec::new(),
3890 shutdown_msg, announcement_sigs,
3894 let required_revoke = if msg.next_remote_commitment_number + 1 == INITIAL_COMMITMENT_NUMBER - self.cur_holder_commitment_transaction_number {
3895 // Remote isn't waiting on any RevokeAndACK from us!
3896 // Note that if we need to repeat our ChannelReady we'll do that in the next if block.
3898 } else if msg.next_remote_commitment_number + 1 == (INITIAL_COMMITMENT_NUMBER - 1) - self.cur_holder_commitment_transaction_number {
3899 if self.channel_state & (ChannelState::MonitorUpdateFailed as u32) != 0 {
3900 self.monitor_pending_revoke_and_ack = true;
3903 Some(self.get_last_revoke_and_ack())
3906 return Err(ChannelError::Close("Peer attempted to reestablish channel with a very old local commitment transaction".to_owned()));
3909 // We increment cur_counterparty_commitment_transaction_number only upon receipt of
3910 // revoke_and_ack, not on sending commitment_signed, so we add one if have
3911 // AwaitingRemoteRevoke set, which indicates we sent a commitment_signed but haven't gotten
3912 // the corresponding revoke_and_ack back yet.
3913 let next_counterparty_commitment_number = INITIAL_COMMITMENT_NUMBER - self.cur_counterparty_commitment_transaction_number + if (self.channel_state & ChannelState::AwaitingRemoteRevoke as u32) != 0 { 1 } else { 0 };
3915 let channel_ready = if msg.next_local_commitment_number == 1 && INITIAL_COMMITMENT_NUMBER - self.cur_holder_commitment_transaction_number == 1 {
3916 // We should never have to worry about MonitorUpdateFailed resending ChannelReady
3917 let next_per_commitment_point = self.holder_signer.get_per_commitment_point(self.cur_holder_commitment_transaction_number, &self.secp_ctx);
3918 Some(msgs::ChannelReady {
3919 channel_id: self.channel_id(),
3920 next_per_commitment_point,
3921 short_channel_id_alias: Some(self.outbound_scid_alias),
3925 if msg.next_local_commitment_number == next_counterparty_commitment_number {
3926 if required_revoke.is_some() {
3927 log_debug!(logger, "Reconnected channel {} with only lost outbound RAA", log_bytes!(self.channel_id()));
3929 log_debug!(logger, "Reconnected channel {} with no loss", log_bytes!(self.channel_id()));
3932 if (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32 | ChannelState::MonitorUpdateFailed as u32)) == 0 {
3933 // We're up-to-date and not waiting on a remote revoke (if we are our
3934 // channel_reestablish should result in them sending a revoke_and_ack), but we may
3935 // have received some updates while we were disconnected. Free the holding cell
3937 match self.free_holding_cell_htlcs(logger) {
3938 Err(ChannelError::Close(msg)) => Err(ChannelError::Close(msg)),
3939 Err(ChannelError::Warn(_)) | Err(ChannelError::Ignore(_)) | Err(ChannelError::CloseDelayBroadcast(_)) =>
3940 panic!("Got non-channel-failing result from free_holding_cell_htlcs"),
3941 Ok((Some((commitment_update, monitor_update)), holding_cell_failed_htlcs)) => {
3942 Ok(ReestablishResponses {
3943 channel_ready, shutdown_msg, announcement_sigs,
3944 raa: required_revoke,
3945 commitment_update: Some(commitment_update),
3946 order: self.resend_order.clone(),
3947 mon_update: Some(monitor_update),
3948 holding_cell_failed_htlcs,
3951 Ok((None, holding_cell_failed_htlcs)) => {
3952 Ok(ReestablishResponses {
3953 channel_ready, shutdown_msg, announcement_sigs,
3954 raa: required_revoke,
3955 commitment_update: None,
3956 order: self.resend_order.clone(),
3958 holding_cell_failed_htlcs,
3963 Ok(ReestablishResponses {
3964 channel_ready, shutdown_msg, announcement_sigs,
3965 raa: required_revoke,
3966 commitment_update: None,
3967 order: self.resend_order.clone(),
3969 holding_cell_failed_htlcs: Vec::new(),
3972 } else if msg.next_local_commitment_number == next_counterparty_commitment_number - 1 {
3973 if required_revoke.is_some() {
3974 log_debug!(logger, "Reconnected channel {} with lost outbound RAA and lost remote commitment tx", log_bytes!(self.channel_id()));
3976 log_debug!(logger, "Reconnected channel {} with only lost remote commitment tx", log_bytes!(self.channel_id()));
3979 if self.channel_state & (ChannelState::MonitorUpdateFailed as u32) != 0 {
3980 self.monitor_pending_commitment_signed = true;
3981 Ok(ReestablishResponses {
3982 channel_ready, shutdown_msg, announcement_sigs,
3983 commitment_update: None, raa: None, mon_update: None,
3984 order: self.resend_order.clone(),
3985 holding_cell_failed_htlcs: Vec::new(),
3988 Ok(ReestablishResponses {
3989 channel_ready, shutdown_msg, announcement_sigs,
3990 raa: required_revoke,
3991 commitment_update: Some(self.get_last_commitment_update(logger)),
3992 order: self.resend_order.clone(),
3994 holding_cell_failed_htlcs: Vec::new(),
3998 Err(ChannelError::Close("Peer attempted to reestablish channel with a very old remote commitment transaction".to_owned()))
4002 /// Calculates and returns our minimum and maximum closing transaction fee amounts, in whole
4003 /// satoshis. The amounts remain consistent unless a peer disconnects/reconnects or we restart,
4004 /// at which point they will be recalculated.
4005 fn calculate_closing_fee_limits<F: Deref>(&mut self, fee_estimator: &F) -> (u64, u64)
4006 where F::Target: FeeEstimator
4008 if let Some((min, max)) = self.closing_fee_limits { return (min, max); }
4010 // Propose a range from our current Background feerate to our Normal feerate plus our
4011 // force_close_avoidance_max_fee_satoshis.
4012 // If we fail to come to consensus, we'll have to force-close.
4013 let mut proposed_feerate = fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Background);
4014 let normal_feerate = fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Normal);
4015 let mut proposed_max_feerate = if self.is_outbound() { normal_feerate } else { u32::max_value() };
4017 // The spec requires that (when the channel does not have anchors) we only send absolute
4018 // channel fees no greater than the absolute channel fee on the current commitment
4019 // transaction. It's unclear *which* commitment transaction this refers to, and there isn't
4020 // very good reason to apply such a limit in any case. We don't bother doing so, risking
4021 // some force-closure by old nodes, but we wanted to close the channel anyway.
4023 if let Some(target_feerate) = self.target_closing_feerate_sats_per_kw {
4024 let min_feerate = if self.is_outbound() { target_feerate } else { cmp::min(self.feerate_per_kw, target_feerate) };
4025 proposed_feerate = cmp::max(proposed_feerate, min_feerate);
4026 proposed_max_feerate = cmp::max(proposed_max_feerate, min_feerate);
4029 // Note that technically we could end up with a lower minimum fee if one sides' balance is
4030 // below our dust limit, causing the output to disappear. We don't bother handling this
4031 // case, however, as this should only happen if a channel is closed before any (material)
4032 // payments have been made on it. This may cause slight fee overpayment and/or failure to
4033 // come to consensus with our counterparty on appropriate fees, however it should be a
4034 // relatively rare case. We can revisit this later, though note that in order to determine
4035 // if the funders' output is dust we have to know the absolute fee we're going to use.
4036 let tx_weight = self.get_closing_transaction_weight(Some(&self.get_closing_scriptpubkey()), Some(self.counterparty_shutdown_scriptpubkey.as_ref().unwrap()));
4037 let proposed_total_fee_satoshis = proposed_feerate as u64 * tx_weight / 1000;
4038 let proposed_max_total_fee_satoshis = if self.is_outbound() {
4039 // We always add force_close_avoidance_max_fee_satoshis to our normal
4040 // feerate-calculated fee, but allow the max to be overridden if we're using a
4041 // target feerate-calculated fee.
4042 cmp::max(normal_feerate as u64 * tx_weight / 1000 + self.config.options.force_close_avoidance_max_fee_satoshis,
4043 proposed_max_feerate as u64 * tx_weight / 1000)
4045 self.channel_value_satoshis - (self.value_to_self_msat + 999) / 1000
4048 self.closing_fee_limits = Some((proposed_total_fee_satoshis, proposed_max_total_fee_satoshis));
4049 self.closing_fee_limits.clone().unwrap()
4052 /// Returns true if we're ready to commence the closing_signed negotiation phase. This is true
4053 /// after both sides have exchanged a `shutdown` message and all HTLCs have been drained. At
4054 /// this point if we're the funder we should send the initial closing_signed, and in any case
4055 /// shutdown should complete within a reasonable timeframe.
4056 fn closing_negotiation_ready(&self) -> bool {
4057 self.pending_inbound_htlcs.is_empty() && self.pending_outbound_htlcs.is_empty() &&
4058 self.channel_state &
4059 (BOTH_SIDES_SHUTDOWN_MASK | ChannelState::AwaitingRemoteRevoke as u32 |
4060 ChannelState::PeerDisconnected as u32 | ChannelState::MonitorUpdateFailed as u32)
4061 == BOTH_SIDES_SHUTDOWN_MASK &&
4062 self.pending_update_fee.is_none()
4065 /// Checks if the closing_signed negotiation is making appropriate progress, possibly returning
4066 /// an Err if no progress is being made and the channel should be force-closed instead.
4067 /// Should be called on a one-minute timer.
4068 pub fn timer_check_closing_negotiation_progress(&mut self) -> Result<(), ChannelError> {
4069 if self.closing_negotiation_ready() {
4070 if self.closing_signed_in_flight {
4071 return Err(ChannelError::Close("closing_signed negotiation failed to finish within two timer ticks".to_owned()));
4073 self.closing_signed_in_flight = true;
4079 pub fn maybe_propose_closing_signed<F: Deref, L: Deref>(&mut self, fee_estimator: &F, logger: &L)
4080 -> Result<(Option<msgs::ClosingSigned>, Option<Transaction>), ChannelError>
4081 where F::Target: FeeEstimator, L::Target: Logger
4083 if self.last_sent_closing_fee.is_some() || !self.closing_negotiation_ready() {
4084 return Ok((None, None));
4087 if !self.is_outbound() {
4088 if let Some(msg) = &self.pending_counterparty_closing_signed.take() {
4089 return self.closing_signed(fee_estimator, &msg);
4091 return Ok((None, None));
4094 let (our_min_fee, our_max_fee) = self.calculate_closing_fee_limits(fee_estimator);
4096 assert!(self.shutdown_scriptpubkey.is_some());
4097 let (closing_tx, total_fee_satoshis) = self.build_closing_transaction(our_min_fee, false);
4098 log_trace!(logger, "Proposing initial closing_signed for our counterparty with a fee range of {}-{} sat (with initial proposal {} sats)",
4099 our_min_fee, our_max_fee, total_fee_satoshis);
4101 let sig = self.holder_signer
4102 .sign_closing_transaction(&closing_tx, &self.secp_ctx)
4103 .map_err(|()| ChannelError::Close("Failed to get signature for closing transaction.".to_owned()))?;
4105 self.last_sent_closing_fee = Some((total_fee_satoshis, sig.clone()));
4106 Ok((Some(msgs::ClosingSigned {
4107 channel_id: self.channel_id,
4108 fee_satoshis: total_fee_satoshis,
4110 fee_range: Some(msgs::ClosingSignedFeeRange {
4111 min_fee_satoshis: our_min_fee,
4112 max_fee_satoshis: our_max_fee,
4117 pub fn shutdown<K: Deref>(
4118 &mut self, keys_provider: &K, their_features: &InitFeatures, msg: &msgs::Shutdown
4119 ) -> Result<(Option<msgs::Shutdown>, Option<ChannelMonitorUpdate>, Vec<(HTLCSource, PaymentHash)>), ChannelError>
4120 where K::Target: KeysInterface<Signer = Signer>
4122 if self.channel_state & (ChannelState::PeerDisconnected as u32) == ChannelState::PeerDisconnected as u32 {
4123 return Err(ChannelError::Close("Peer sent shutdown when we needed a channel_reestablish".to_owned()));
4125 if self.channel_state < ChannelState::FundingSent as u32 {
4126 // Spec says we should fail the connection, not the channel, but that's nonsense, there
4127 // are plenty of reasons you may want to fail a channel pre-funding, and spec says you
4128 // can do that via error message without getting a connection fail anyway...
4129 return Err(ChannelError::Close("Peer sent shutdown pre-funding generation".to_owned()));
4131 for htlc in self.pending_inbound_htlcs.iter() {
4132 if let InboundHTLCState::RemoteAnnounced(_) = htlc.state {
4133 return Err(ChannelError::Close("Got shutdown with remote pending HTLCs".to_owned()));
4136 assert_eq!(self.channel_state & ChannelState::ShutdownComplete as u32, 0);
4138 if !script::is_bolt2_compliant(&msg.scriptpubkey, their_features) {
4139 return Err(ChannelError::Warn(format!("Got a nonstandard scriptpubkey ({}) from remote peer", msg.scriptpubkey.to_bytes().to_hex())));
4142 if self.counterparty_shutdown_scriptpubkey.is_some() {
4143 if Some(&msg.scriptpubkey) != self.counterparty_shutdown_scriptpubkey.as_ref() {
4144 return Err(ChannelError::Warn(format!("Got shutdown request with a scriptpubkey ({}) which did not match their previous scriptpubkey.", msg.scriptpubkey.to_bytes().to_hex())));
4147 self.counterparty_shutdown_scriptpubkey = Some(msg.scriptpubkey.clone());
4150 // If we have any LocalAnnounced updates we'll probably just get back an update_fail_htlc
4151 // immediately after the commitment dance, but we can send a Shutdown because we won't send
4152 // any further commitment updates after we set LocalShutdownSent.
4153 let send_shutdown = (self.channel_state & ChannelState::LocalShutdownSent as u32) != ChannelState::LocalShutdownSent as u32;
4155 let update_shutdown_script = match self.shutdown_scriptpubkey {
4158 assert!(send_shutdown);
4159 let shutdown_scriptpubkey = keys_provider.get_shutdown_scriptpubkey();
4160 if !shutdown_scriptpubkey.is_compatible(their_features) {
4161 return Err(ChannelError::Close(format!("Provided a scriptpubkey format not accepted by peer: {}", shutdown_scriptpubkey)));
4163 self.shutdown_scriptpubkey = Some(shutdown_scriptpubkey);
4168 // From here on out, we may not fail!
4170 self.channel_state |= ChannelState::RemoteShutdownSent as u32;
4171 self.update_time_counter += 1;
4173 let monitor_update = if update_shutdown_script {
4174 self.latest_monitor_update_id += 1;
4175 Some(ChannelMonitorUpdate {
4176 update_id: self.latest_monitor_update_id,
4177 updates: vec![ChannelMonitorUpdateStep::ShutdownScript {
4178 scriptpubkey: self.get_closing_scriptpubkey(),
4182 let shutdown = if send_shutdown {
4183 Some(msgs::Shutdown {
4184 channel_id: self.channel_id,
4185 scriptpubkey: self.get_closing_scriptpubkey(),
4189 // We can't send our shutdown until we've committed all of our pending HTLCs, but the
4190 // remote side is unlikely to accept any new HTLCs, so we go ahead and "free" any holding
4191 // cell HTLCs and return them to fail the payment.
4192 self.holding_cell_update_fee = None;
4193 let mut dropped_outbound_htlcs = Vec::with_capacity(self.holding_cell_htlc_updates.len());
4194 self.holding_cell_htlc_updates.retain(|htlc_update| {
4196 &HTLCUpdateAwaitingACK::AddHTLC { ref payment_hash, ref source, .. } => {
4197 dropped_outbound_htlcs.push((source.clone(), payment_hash.clone()));
4204 self.channel_state |= ChannelState::LocalShutdownSent as u32;
4205 self.update_time_counter += 1;
4207 Ok((shutdown, monitor_update, dropped_outbound_htlcs))
4210 fn build_signed_closing_transaction(&self, closing_tx: &ClosingTransaction, counterparty_sig: &Signature, sig: &Signature) -> Transaction {
4211 let mut tx = closing_tx.trust().built_transaction().clone();
4213 tx.input[0].witness.push(Vec::new()); // First is the multisig dummy
4215 let funding_key = self.get_holder_pubkeys().funding_pubkey.serialize();
4216 let counterparty_funding_key = self.counterparty_funding_pubkey().serialize();
4217 let mut holder_sig = sig.serialize_der().to_vec();
4218 holder_sig.push(EcdsaSighashType::All as u8);
4219 let mut cp_sig = counterparty_sig.serialize_der().to_vec();
4220 cp_sig.push(EcdsaSighashType::All as u8);
4221 if funding_key[..] < counterparty_funding_key[..] {
4222 tx.input[0].witness.push(holder_sig);
4223 tx.input[0].witness.push(cp_sig);
4225 tx.input[0].witness.push(cp_sig);
4226 tx.input[0].witness.push(holder_sig);
4229 tx.input[0].witness.push(self.get_funding_redeemscript().into_bytes());
4233 pub fn closing_signed<F: Deref>(&mut self, fee_estimator: &F, msg: &msgs::ClosingSigned) -> Result<(Option<msgs::ClosingSigned>, Option<Transaction>), ChannelError>
4234 where F::Target: FeeEstimator
4236 if self.channel_state & BOTH_SIDES_SHUTDOWN_MASK != BOTH_SIDES_SHUTDOWN_MASK {
4237 return Err(ChannelError::Close("Remote end sent us a closing_signed before both sides provided a shutdown".to_owned()));
4239 if self.channel_state & (ChannelState::PeerDisconnected as u32) == ChannelState::PeerDisconnected as u32 {
4240 return Err(ChannelError::Close("Peer sent closing_signed when we needed a channel_reestablish".to_owned()));
4242 if !self.pending_inbound_htlcs.is_empty() || !self.pending_outbound_htlcs.is_empty() {
4243 return Err(ChannelError::Close("Remote end sent us a closing_signed while there were still pending HTLCs".to_owned()));
4245 if msg.fee_satoshis > TOTAL_BITCOIN_SUPPLY_SATOSHIS { // this is required to stop potential overflow in build_closing_transaction
4246 return Err(ChannelError::Close("Remote tried to send us a closing tx with > 21 million BTC fee".to_owned()));
4249 if self.is_outbound() && self.last_sent_closing_fee.is_none() {
4250 return Err(ChannelError::Close("Remote tried to send a closing_signed when we were supposed to propose the first one".to_owned()));
4253 if self.channel_state & ChannelState::MonitorUpdateFailed as u32 != 0 {
4254 self.pending_counterparty_closing_signed = Some(msg.clone());
4255 return Ok((None, None));
4258 let funding_redeemscript = self.get_funding_redeemscript();
4259 let (mut closing_tx, used_total_fee) = self.build_closing_transaction(msg.fee_satoshis, false);
4260 if used_total_fee != msg.fee_satoshis {
4261 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)));
4263 let sighash = closing_tx.trust().get_sighash_all(&funding_redeemscript, self.channel_value_satoshis);
4265 match self.secp_ctx.verify_ecdsa(&sighash, &msg.signature, &self.get_counterparty_pubkeys().funding_pubkey) {
4268 // The remote end may have decided to revoke their output due to inconsistent dust
4269 // limits, so check for that case by re-checking the signature here.
4270 closing_tx = self.build_closing_transaction(msg.fee_satoshis, true).0;
4271 let sighash = closing_tx.trust().get_sighash_all(&funding_redeemscript, self.channel_value_satoshis);
4272 secp_check!(self.secp_ctx.verify_ecdsa(&sighash, &msg.signature, self.counterparty_funding_pubkey()), "Invalid closing tx signature from peer".to_owned());
4276 for outp in closing_tx.trust().built_transaction().output.iter() {
4277 if !outp.script_pubkey.is_witness_program() && outp.value < MAX_STD_OUTPUT_DUST_LIMIT_SATOSHIS {
4278 return Err(ChannelError::Close("Remote sent us a closing_signed with a dust output. Always use segwit closing scripts!".to_owned()));
4282 assert!(self.shutdown_scriptpubkey.is_some());
4283 if let Some((last_fee, sig)) = self.last_sent_closing_fee {
4284 if last_fee == msg.fee_satoshis {
4285 let tx = self.build_signed_closing_transaction(&mut closing_tx, &msg.signature, &sig);
4286 self.channel_state = ChannelState::ShutdownComplete as u32;
4287 self.update_time_counter += 1;
4288 return Ok((None, Some(tx)));
4292 let (our_min_fee, our_max_fee) = self.calculate_closing_fee_limits(fee_estimator);
4294 macro_rules! propose_fee {
4295 ($new_fee: expr) => {
4296 let (closing_tx, used_fee) = if $new_fee == msg.fee_satoshis {
4297 (closing_tx, $new_fee)
4299 self.build_closing_transaction($new_fee, false)
4302 let sig = self.holder_signer
4303 .sign_closing_transaction(&closing_tx, &self.secp_ctx)
4304 .map_err(|_| ChannelError::Close("External signer refused to sign closing transaction".to_owned()))?;
4306 let signed_tx = if $new_fee == msg.fee_satoshis {
4307 self.channel_state = ChannelState::ShutdownComplete as u32;
4308 self.update_time_counter += 1;
4309 let tx = self.build_signed_closing_transaction(&closing_tx, &msg.signature, &sig);
4313 self.last_sent_closing_fee = Some((used_fee, sig.clone()));
4314 return Ok((Some(msgs::ClosingSigned {
4315 channel_id: self.channel_id,
4316 fee_satoshis: used_fee,
4318 fee_range: Some(msgs::ClosingSignedFeeRange {
4319 min_fee_satoshis: our_min_fee,
4320 max_fee_satoshis: our_max_fee,
4326 if let Some(msgs::ClosingSignedFeeRange { min_fee_satoshis, max_fee_satoshis }) = msg.fee_range {
4327 if msg.fee_satoshis < min_fee_satoshis || msg.fee_satoshis > max_fee_satoshis {
4328 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)));
4330 if max_fee_satoshis < our_min_fee {
4331 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)));
4333 if min_fee_satoshis > our_max_fee {
4334 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)));
4337 if !self.is_outbound() {
4338 // They have to pay, so pick the highest fee in the overlapping range.
4339 // We should never set an upper bound aside from their full balance
4340 debug_assert_eq!(our_max_fee, self.channel_value_satoshis - (self.value_to_self_msat + 999) / 1000);
4341 propose_fee!(cmp::min(max_fee_satoshis, our_max_fee));
4343 if msg.fee_satoshis < our_min_fee || msg.fee_satoshis > our_max_fee {
4344 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.",
4345 msg.fee_satoshis, our_min_fee, our_max_fee)));
4347 // The proposed fee is in our acceptable range, accept it and broadcast!
4348 propose_fee!(msg.fee_satoshis);
4351 // Old fee style negotiation. We don't bother to enforce whether they are complying
4352 // with the "making progress" requirements, we just comply and hope for the best.
4353 if let Some((last_fee, _)) = self.last_sent_closing_fee {
4354 if msg.fee_satoshis > last_fee {
4355 if msg.fee_satoshis < our_max_fee {
4356 propose_fee!(msg.fee_satoshis);
4357 } else if last_fee < our_max_fee {
4358 propose_fee!(our_max_fee);
4360 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)));
4363 if msg.fee_satoshis > our_min_fee {
4364 propose_fee!(msg.fee_satoshis);
4365 } else if last_fee > our_min_fee {
4366 propose_fee!(our_min_fee);
4368 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)));
4372 if msg.fee_satoshis < our_min_fee {
4373 propose_fee!(our_min_fee);
4374 } else if msg.fee_satoshis > our_max_fee {
4375 propose_fee!(our_max_fee);
4377 propose_fee!(msg.fee_satoshis);
4383 // Public utilities:
4385 pub fn channel_id(&self) -> [u8; 32] {
4389 pub fn minimum_depth(&self) -> Option<u32> {
4393 /// Gets the "user_id" value passed into the construction of this channel. It has no special
4394 /// meaning and exists only to allow users to have a persistent identifier of a channel.
4395 pub fn get_user_id(&self) -> u64 {
4399 /// Gets the channel's type
4400 pub fn get_channel_type(&self) -> &ChannelTypeFeatures {
4404 /// Guaranteed to be Some after both ChannelReady messages have been exchanged (and, thus,
4405 /// is_usable() returns true).
4406 /// Allowed in any state (including after shutdown)
4407 pub fn get_short_channel_id(&self) -> Option<u64> {
4408 self.short_channel_id
4411 /// Allowed in any state (including after shutdown)
4412 pub fn latest_inbound_scid_alias(&self) -> Option<u64> {
4413 self.latest_inbound_scid_alias
4416 /// Allowed in any state (including after shutdown)
4417 pub fn outbound_scid_alias(&self) -> u64 {
4418 self.outbound_scid_alias
4420 /// Only allowed immediately after deserialization if get_outbound_scid_alias returns 0,
4421 /// indicating we were written by LDK prior to 0.0.106 which did not set outbound SCID aliases.
4422 pub fn set_outbound_scid_alias(&mut self, outbound_scid_alias: u64) {
4423 assert_eq!(self.outbound_scid_alias, 0);
4424 self.outbound_scid_alias = outbound_scid_alias;
4427 /// Returns the funding_txo we either got from our peer, or were given by
4428 /// get_outbound_funding_created.
4429 pub fn get_funding_txo(&self) -> Option<OutPoint> {
4430 self.channel_transaction_parameters.funding_outpoint
4433 fn get_holder_selected_contest_delay(&self) -> u16 {
4434 self.channel_transaction_parameters.holder_selected_contest_delay
4437 fn get_holder_pubkeys(&self) -> &ChannelPublicKeys {
4438 &self.channel_transaction_parameters.holder_pubkeys
4441 pub fn get_counterparty_selected_contest_delay(&self) -> Option<u16> {
4442 self.channel_transaction_parameters.counterparty_parameters
4443 .as_ref().map(|params| params.selected_contest_delay)
4446 fn get_counterparty_pubkeys(&self) -> &ChannelPublicKeys {
4447 &self.channel_transaction_parameters.counterparty_parameters.as_ref().unwrap().pubkeys
4450 /// Allowed in any state (including after shutdown)
4451 pub fn get_counterparty_node_id(&self) -> PublicKey {
4452 self.counterparty_node_id
4455 /// Allowed in any state (including after shutdown)
4456 pub fn get_holder_htlc_minimum_msat(&self) -> u64 {
4457 self.holder_htlc_minimum_msat
4460 /// Allowed in any state (including after shutdown), but will return none before TheirInitSent
4461 pub fn get_holder_htlc_maximum_msat(&self) -> Option<u64> {
4462 self.get_htlc_maximum_msat(self.holder_max_htlc_value_in_flight_msat)
4465 /// Allowed in any state (including after shutdown)
4466 pub fn get_announced_htlc_max_msat(&self) -> u64 {
4468 // Upper bound by capacity. We make it a bit less than full capacity to prevent attempts
4469 // to use full capacity. This is an effort to reduce routing failures, because in many cases
4470 // channel might have been used to route very small values (either by honest users or as DoS).
4471 self.channel_value_satoshis * 1000 * 9 / 10,
4473 self.counterparty_max_htlc_value_in_flight_msat
4477 /// Allowed in any state (including after shutdown)
4478 pub fn get_counterparty_htlc_minimum_msat(&self) -> u64 {
4479 self.counterparty_htlc_minimum_msat
4482 /// Allowed in any state (including after shutdown), but will return none before TheirInitSent
4483 pub fn get_counterparty_htlc_maximum_msat(&self) -> Option<u64> {
4484 self.get_htlc_maximum_msat(self.counterparty_max_htlc_value_in_flight_msat)
4487 fn get_htlc_maximum_msat(&self, party_max_htlc_value_in_flight_msat: u64) -> Option<u64> {
4488 self.counterparty_selected_channel_reserve_satoshis.map(|counterparty_reserve| {
4489 let holder_reserve = self.holder_selected_channel_reserve_satoshis;
4491 (self.channel_value_satoshis - counterparty_reserve - holder_reserve) * 1000,
4492 party_max_htlc_value_in_flight_msat
4497 pub fn get_value_satoshis(&self) -> u64 {
4498 self.channel_value_satoshis
4501 pub fn get_fee_proportional_millionths(&self) -> u32 {
4502 self.config.options.forwarding_fee_proportional_millionths
4505 pub fn get_cltv_expiry_delta(&self) -> u16 {
4506 cmp::max(self.config.options.cltv_expiry_delta, MIN_CLTV_EXPIRY_DELTA)
4509 pub fn get_max_dust_htlc_exposure_msat(&self) -> u64 {
4510 self.config.options.max_dust_htlc_exposure_msat
4513 /// Returns the previous [`ChannelConfig`] applied to this channel, if any.
4514 pub fn prev_config(&self) -> Option<ChannelConfig> {
4515 self.prev_config.map(|prev_config| prev_config.0)
4518 /// Tracks the number of ticks elapsed since the previous [`ChannelConfig`] was updated. Once
4519 /// [`EXPIRE_PREV_CONFIG_TICKS`] is reached, the previous config is considered expired and will
4520 /// no longer be considered when forwarding HTLCs.
4521 pub fn maybe_expire_prev_config(&mut self) {
4522 if self.prev_config.is_none() {
4525 let prev_config = self.prev_config.as_mut().unwrap();
4527 if prev_config.1 == EXPIRE_PREV_CONFIG_TICKS {
4528 self.prev_config = None;
4532 /// Returns the current [`ChannelConfig`] applied to the channel.
4533 pub fn config(&self) -> ChannelConfig {
4537 /// Updates the channel's config. A bool is returned indicating whether the config update
4538 /// applied resulted in a new ChannelUpdate message.
4539 pub fn update_config(&mut self, config: &ChannelConfig) -> bool {
4540 let did_channel_update =
4541 self.config.options.forwarding_fee_proportional_millionths != config.forwarding_fee_proportional_millionths ||
4542 self.config.options.forwarding_fee_base_msat != config.forwarding_fee_base_msat ||
4543 self.config.options.cltv_expiry_delta != config.cltv_expiry_delta;
4544 if did_channel_update {
4545 self.prev_config = Some((self.config.options, 0));
4546 // Update the counter, which backs the ChannelUpdate timestamp, to allow the relay
4547 // policy change to propagate throughout the network.
4548 self.update_time_counter += 1;
4550 self.config.options = *config;
4554 fn internal_htlc_satisfies_config(
4555 &self, htlc: &msgs::UpdateAddHTLC, amt_to_forward: u64, outgoing_cltv_value: u32, config: &ChannelConfig,
4556 ) -> Result<(), (&'static str, u16)> {
4557 let fee = amt_to_forward.checked_mul(config.forwarding_fee_proportional_millionths as u64)
4558 .and_then(|prop_fee| (prop_fee / 1000000).checked_add(config.forwarding_fee_base_msat as u64));
4559 if fee.is_none() || htlc.amount_msat < fee.unwrap() ||
4560 (htlc.amount_msat - fee.unwrap()) < amt_to_forward {
4562 "Prior hop has deviated from specified fees parameters or origin node has obsolete ones",
4563 0x1000 | 12, // fee_insufficient
4566 if (htlc.cltv_expiry as u64) < outgoing_cltv_value as u64 + config.cltv_expiry_delta as u64 {
4568 "Forwarding node has tampered with the intended HTLC values or origin node has an obsolete cltv_expiry_delta",
4569 0x1000 | 13, // incorrect_cltv_expiry
4575 /// Determines whether the parameters of an incoming HTLC to be forwarded satisfy the channel's
4576 /// [`ChannelConfig`]. This first looks at the channel's current [`ChannelConfig`], and if
4577 /// unsuccessful, falls back to the previous one if one exists.
4578 pub fn htlc_satisfies_config(
4579 &self, htlc: &msgs::UpdateAddHTLC, amt_to_forward: u64, outgoing_cltv_value: u32,
4580 ) -> Result<(), (&'static str, u16)> {
4581 self.internal_htlc_satisfies_config(&htlc, amt_to_forward, outgoing_cltv_value, &self.config())
4583 if let Some(prev_config) = self.prev_config() {
4584 self.internal_htlc_satisfies_config(htlc, amt_to_forward, outgoing_cltv_value, &prev_config)
4591 pub fn get_feerate(&self) -> u32 {
4595 pub fn get_dust_buffer_feerate(&self, outbound_feerate_update: Option<u32>) -> u32 {
4596 // When calculating our exposure to dust HTLCs, we assume that the channel feerate
4597 // may, at any point, increase by at least 10 sat/vB (i.e 2530 sat/kWU) or 25%,
4598 // whichever is higher. This ensures that we aren't suddenly exposed to significantly
4599 // more dust balance if the feerate increases when we have several HTLCs pending
4600 // which are near the dust limit.
4601 let mut feerate_per_kw = self.feerate_per_kw;
4602 // If there's a pending update fee, use it to ensure we aren't under-estimating
4603 // potential feerate updates coming soon.
4604 if let Some((feerate, _)) = self.pending_update_fee {
4605 feerate_per_kw = cmp::max(feerate_per_kw, feerate);
4607 if let Some(feerate) = outbound_feerate_update {
4608 feerate_per_kw = cmp::max(feerate_per_kw, feerate);
4610 cmp::max(2530, feerate_per_kw * 1250 / 1000)
4613 pub fn get_cur_holder_commitment_transaction_number(&self) -> u64 {
4614 self.cur_holder_commitment_transaction_number + 1
4617 pub fn get_cur_counterparty_commitment_transaction_number(&self) -> u64 {
4618 self.cur_counterparty_commitment_transaction_number + 1 - if self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32) != 0 { 1 } else { 0 }
4621 pub fn get_revoked_counterparty_commitment_transaction_number(&self) -> u64 {
4622 self.cur_counterparty_commitment_transaction_number + 2
4626 pub fn get_signer(&self) -> &Signer {
4631 pub fn get_value_stat(&self) -> ChannelValueStat {
4633 value_to_self_msat: self.value_to_self_msat,
4634 channel_value_msat: self.channel_value_satoshis * 1000,
4635 channel_reserve_msat: self.counterparty_selected_channel_reserve_satoshis.unwrap() * 1000,
4636 pending_outbound_htlcs_amount_msat: self.pending_outbound_htlcs.iter().map(|ref h| h.amount_msat).sum::<u64>(),
4637 pending_inbound_htlcs_amount_msat: self.pending_inbound_htlcs.iter().map(|ref h| h.amount_msat).sum::<u64>(),
4638 holding_cell_outbound_amount_msat: {
4640 for h in self.holding_cell_htlc_updates.iter() {
4642 &HTLCUpdateAwaitingACK::AddHTLC{amount_msat, .. } => {
4650 counterparty_max_htlc_value_in_flight_msat: self.counterparty_max_htlc_value_in_flight_msat,
4651 counterparty_dust_limit_msat: self.counterparty_dust_limit_satoshis * 1000,
4655 /// Allowed in any state (including after shutdown)
4656 pub fn get_update_time_counter(&self) -> u32 {
4657 self.update_time_counter
4660 pub fn get_latest_monitor_update_id(&self) -> u64 {
4661 self.latest_monitor_update_id
4664 pub fn should_announce(&self) -> bool {
4665 self.config.announced_channel
4668 pub fn is_outbound(&self) -> bool {
4669 self.channel_transaction_parameters.is_outbound_from_holder
4672 /// Gets the fee we'd want to charge for adding an HTLC output to this Channel
4673 /// Allowed in any state (including after shutdown)
4674 pub fn get_outbound_forwarding_fee_base_msat(&self) -> u32 {
4675 self.config.options.forwarding_fee_base_msat
4678 /// Returns true if we've ever received a message from the remote end for this Channel
4679 pub fn have_received_message(&self) -> bool {
4680 self.channel_state > (ChannelState::OurInitSent as u32)
4683 /// Returns true if this channel is fully established and not known to be closing.
4684 /// Allowed in any state (including after shutdown)
4685 pub fn is_usable(&self) -> bool {
4686 let mask = ChannelState::ChannelFunded as u32 | BOTH_SIDES_SHUTDOWN_MASK;
4687 (self.channel_state & mask) == (ChannelState::ChannelFunded as u32) && !self.monitor_pending_channel_ready
4690 /// Returns true if this channel is currently available for use. This is a superset of
4691 /// is_usable() and considers things like the channel being temporarily disabled.
4692 /// Allowed in any state (including after shutdown)
4693 pub fn is_live(&self) -> bool {
4694 self.is_usable() && (self.channel_state & (ChannelState::PeerDisconnected as u32) == 0)
4697 /// Returns true if this channel has been marked as awaiting a monitor update to move forward.
4698 /// Allowed in any state (including after shutdown)
4699 pub fn is_awaiting_monitor_update(&self) -> bool {
4700 (self.channel_state & ChannelState::MonitorUpdateFailed as u32) != 0
4703 /// Returns true if funding_created was sent/received.
4704 pub fn is_funding_initiated(&self) -> bool {
4705 self.channel_state >= ChannelState::FundingSent as u32
4708 /// Returns true if our channel_ready has been sent
4709 pub fn is_our_channel_ready(&self) -> bool {
4710 (self.channel_state & ChannelState::OurChannelReady as u32) != 0 || self.channel_state >= ChannelState::ChannelFunded as u32
4713 /// Returns true if our peer has either initiated or agreed to shut down the channel.
4714 pub fn received_shutdown(&self) -> bool {
4715 (self.channel_state & ChannelState::RemoteShutdownSent as u32) != 0
4718 /// Returns true if we either initiated or agreed to shut down the channel.
4719 pub fn sent_shutdown(&self) -> bool {
4720 (self.channel_state & ChannelState::LocalShutdownSent as u32) != 0
4723 /// Returns true if this channel is fully shut down. True here implies that no further actions
4724 /// may/will be taken on this channel, and thus this object should be freed. Any future changes
4725 /// will be handled appropriately by the chain monitor.
4726 pub fn is_shutdown(&self) -> bool {
4727 if (self.channel_state & ChannelState::ShutdownComplete as u32) == ChannelState::ShutdownComplete as u32 {
4728 assert!(self.channel_state == ChannelState::ShutdownComplete as u32);
4733 pub fn channel_update_status(&self) -> ChannelUpdateStatus {
4734 self.channel_update_status
4737 pub fn set_channel_update_status(&mut self, status: ChannelUpdateStatus) {
4738 self.update_time_counter += 1;
4739 self.channel_update_status = status;
4742 fn check_get_channel_ready(&mut self, height: u32) -> Option<msgs::ChannelReady> {
4743 if self.funding_tx_confirmation_height == 0 && self.minimum_depth != Some(0) {
4747 let funding_tx_confirmations = height as i64 - self.funding_tx_confirmation_height as i64 + 1;
4748 if funding_tx_confirmations <= 0 {
4749 self.funding_tx_confirmation_height = 0;
4752 if funding_tx_confirmations < self.minimum_depth.unwrap_or(0) as i64 {
4756 let non_shutdown_state = self.channel_state & (!MULTI_STATE_FLAGS);
4757 let need_commitment_update = if non_shutdown_state == ChannelState::FundingSent as u32 {
4758 self.channel_state |= ChannelState::OurChannelReady as u32;
4760 } else if non_shutdown_state == (ChannelState::FundingSent as u32 | ChannelState::TheirChannelReady as u32) {
4761 self.channel_state = ChannelState::ChannelFunded as u32 | (self.channel_state & MULTI_STATE_FLAGS);
4762 self.update_time_counter += 1;
4764 } else if non_shutdown_state == (ChannelState::FundingSent as u32 | ChannelState::OurChannelReady as u32) {
4765 // We got a reorg but not enough to trigger a force close, just ignore.
4768 if self.channel_state < ChannelState::ChannelFunded as u32 {
4769 // We should never see a funding transaction on-chain until we've received
4770 // funding_signed (if we're an outbound channel), or seen funding_generated (if we're
4771 // an inbound channel - before that we have no known funding TXID). The fuzzer,
4772 // however, may do this and we shouldn't treat it as a bug.
4773 #[cfg(not(fuzzing))]
4774 panic!("Started confirming a channel in a state pre-FundingSent: {}.\n\
4775 Do NOT broadcast a funding transaction manually - let LDK do it for you!",
4776 self.channel_state);
4778 // We got a reorg but not enough to trigger a force close, just ignore.
4782 if need_commitment_update {
4783 if self.channel_state & (ChannelState::MonitorUpdateFailed as u32) == 0 {
4784 if self.channel_state & (ChannelState::PeerDisconnected as u32) == 0 {
4785 let next_per_commitment_point =
4786 self.holder_signer.get_per_commitment_point(INITIAL_COMMITMENT_NUMBER - 1, &self.secp_ctx);
4787 return Some(msgs::ChannelReady {
4788 channel_id: self.channel_id,
4789 next_per_commitment_point,
4790 short_channel_id_alias: Some(self.outbound_scid_alias),
4794 self.monitor_pending_channel_ready = true;
4800 /// When a transaction is confirmed, we check whether it is or spends the funding transaction
4801 /// In the first case, we store the confirmation height and calculating the short channel id.
4802 /// In the second, we simply return an Err indicating we need to be force-closed now.
4803 pub fn transactions_confirmed<L: Deref>(&mut self, block_hash: &BlockHash, height: u32,
4804 txdata: &TransactionData, genesis_block_hash: BlockHash, node_pk: PublicKey, logger: &L)
4805 -> Result<(Option<msgs::ChannelReady>, Option<msgs::AnnouncementSignatures>), ClosureReason> where L::Target: Logger {
4806 if let Some(funding_txo) = self.get_funding_txo() {
4807 for &(index_in_block, tx) in txdata.iter() {
4808 // Check if the transaction is the expected funding transaction, and if it is,
4809 // check that it pays the right amount to the right script.
4810 if self.funding_tx_confirmation_height == 0 {
4811 if tx.txid() == funding_txo.txid {
4812 let txo_idx = funding_txo.index as usize;
4813 if txo_idx >= tx.output.len() || tx.output[txo_idx].script_pubkey != self.get_funding_redeemscript().to_v0_p2wsh() ||
4814 tx.output[txo_idx].value != self.channel_value_satoshis {
4815 if self.is_outbound() {
4816 // If we generated the funding transaction and it doesn't match what it
4817 // should, the client is really broken and we should just panic and
4818 // tell them off. That said, because hash collisions happen with high
4819 // probability in fuzzing mode, if we're fuzzing we just close the
4820 // channel and move on.
4821 #[cfg(not(fuzzing))]
4822 panic!("Client called ChannelManager::funding_transaction_generated with bogus transaction!");
4824 self.update_time_counter += 1;
4825 let err_reason = "funding tx had wrong script/value or output index";
4826 return Err(ClosureReason::ProcessingError { err: err_reason.to_owned() });
4828 if self.is_outbound() {
4829 for input in tx.input.iter() {
4830 if input.witness.is_empty() {
4831 // We generated a malleable funding transaction, implying we've
4832 // just exposed ourselves to funds loss to our counterparty.
4833 #[cfg(not(fuzzing))]
4834 panic!("Client called ChannelManager::funding_transaction_generated with bogus transaction!");
4838 self.funding_tx_confirmation_height = height;
4839 self.funding_tx_confirmed_in = Some(*block_hash);
4840 self.short_channel_id = match scid_from_parts(height as u64, index_in_block as u64, txo_idx as u64) {
4841 Ok(scid) => Some(scid),
4842 Err(_) => panic!("Block was bogus - either height was > 16 million, had > 16 million transactions, or had > 65k outputs"),
4846 // If we allow 1-conf funding, we may need to check for channel_ready here and
4847 // send it immediately instead of waiting for a best_block_updated call (which
4848 // may have already happened for this block).
4849 if let Some(channel_ready) = self.check_get_channel_ready(height) {
4850 log_info!(logger, "Sending a channel_ready to our peer for channel {}", log_bytes!(self.channel_id));
4851 let announcement_sigs = self.get_announcement_sigs(node_pk, genesis_block_hash, height, logger);
4852 return Ok((Some(channel_ready), announcement_sigs));
4855 for inp in tx.input.iter() {
4856 if inp.previous_output == funding_txo.into_bitcoin_outpoint() {
4857 log_info!(logger, "Detected channel-closing tx {} spending {}:{}, closing channel {}", tx.txid(), inp.previous_output.txid, inp.previous_output.vout, log_bytes!(self.channel_id()));
4858 return Err(ClosureReason::CommitmentTxConfirmed);
4866 /// When a new block is connected, we check the height of the block against outbound holding
4867 /// cell HTLCs in case we need to give up on them prematurely and time them out. Everything
4868 /// else (e.g. commitment transaction broadcasts, HTLC transaction broadcasting, etc) is
4869 /// handled by the ChannelMonitor.
4871 /// If we return Err, the channel may have been closed, at which point the standard
4872 /// requirements apply - no calls may be made except those explicitly stated to be allowed
4875 /// May return some HTLCs (and their payment_hash) which have timed out and should be failed
4877 pub fn best_block_updated<L: Deref>(&mut self, height: u32, highest_header_time: u32, genesis_block_hash: BlockHash, node_pk: PublicKey, logger: &L)
4878 -> Result<(Option<msgs::ChannelReady>, Vec<(HTLCSource, PaymentHash)>, Option<msgs::AnnouncementSignatures>), ClosureReason> where L::Target: Logger {
4879 self.do_best_block_updated(height, highest_header_time, Some((genesis_block_hash, node_pk)), logger)
4882 fn do_best_block_updated<L: Deref>(&mut self, height: u32, highest_header_time: u32, genesis_node_pk: Option<(BlockHash, PublicKey)>, logger: &L)
4883 -> Result<(Option<msgs::ChannelReady>, Vec<(HTLCSource, PaymentHash)>, Option<msgs::AnnouncementSignatures>), ClosureReason> where L::Target: Logger {
4884 let mut timed_out_htlcs = Vec::new();
4885 // This mirrors the check in ChannelManager::decode_update_add_htlc_onion, refusing to
4886 // forward an HTLC when our counterparty should almost certainly just fail it for expiring
4888 let unforwarded_htlc_cltv_limit = height + LATENCY_GRACE_PERIOD_BLOCKS;
4889 self.holding_cell_htlc_updates.retain(|htlc_update| {
4891 &HTLCUpdateAwaitingACK::AddHTLC { ref payment_hash, ref source, ref cltv_expiry, .. } => {
4892 if *cltv_expiry <= unforwarded_htlc_cltv_limit {
4893 timed_out_htlcs.push((source.clone(), payment_hash.clone()));
4901 self.update_time_counter = cmp::max(self.update_time_counter, highest_header_time);
4903 if let Some(channel_ready) = self.check_get_channel_ready(height) {
4904 let announcement_sigs = if let Some((genesis_block_hash, node_pk)) = genesis_node_pk {
4905 self.get_announcement_sigs(node_pk, genesis_block_hash, height, logger)
4907 log_info!(logger, "Sending a channel_ready to our peer for channel {}", log_bytes!(self.channel_id));
4908 return Ok((Some(channel_ready), timed_out_htlcs, announcement_sigs));
4911 let non_shutdown_state = self.channel_state & (!MULTI_STATE_FLAGS);
4912 if non_shutdown_state >= ChannelState::ChannelFunded as u32 ||
4913 (non_shutdown_state & ChannelState::OurChannelReady as u32) == ChannelState::OurChannelReady as u32 {
4914 let mut funding_tx_confirmations = height as i64 - self.funding_tx_confirmation_height as i64 + 1;
4915 if self.funding_tx_confirmation_height == 0 {
4916 // Note that check_get_channel_ready may reset funding_tx_confirmation_height to
4917 // zero if it has been reorged out, however in either case, our state flags
4918 // indicate we've already sent a channel_ready
4919 funding_tx_confirmations = 0;
4922 // If we've sent channel_ready (or have both sent and received channel_ready), and
4923 // the funding transaction has become unconfirmed,
4924 // close the channel and hope we can get the latest state on chain (because presumably
4925 // the funding transaction is at least still in the mempool of most nodes).
4927 // Note that ideally we wouldn't force-close if we see *any* reorg on a 1-conf or
4928 // 0-conf channel, but not doing so may lead to the `ChannelManager::short_to_id` map
4929 // being inconsistent, so we currently have to.
4930 if funding_tx_confirmations == 0 && self.funding_tx_confirmed_in.is_some() {
4931 let err_reason = format!("Funding transaction was un-confirmed. Locked at {} confs, now have {} confs.",
4932 self.minimum_depth.unwrap(), funding_tx_confirmations);
4933 return Err(ClosureReason::ProcessingError { err: err_reason });
4935 } else if !self.is_outbound() && self.funding_tx_confirmed_in.is_none() &&
4936 height >= self.channel_creation_height + FUNDING_CONF_DEADLINE_BLOCKS {
4937 log_info!(logger, "Closing channel {} due to funding timeout", log_bytes!(self.channel_id));
4938 // If funding_tx_confirmed_in is unset, the channel must not be active
4939 assert!(non_shutdown_state <= ChannelState::ChannelFunded as u32);
4940 assert_eq!(non_shutdown_state & ChannelState::OurChannelReady as u32, 0);
4941 return Err(ClosureReason::FundingTimedOut);
4944 let announcement_sigs = if let Some((genesis_block_hash, node_pk)) = genesis_node_pk {
4945 self.get_announcement_sigs(node_pk, genesis_block_hash, height, logger)
4947 Ok((None, timed_out_htlcs, announcement_sigs))
4950 /// Indicates the funding transaction is no longer confirmed in the main chain. This may
4951 /// force-close the channel, but may also indicate a harmless reorganization of a block or two
4952 /// before the channel has reached channel_ready and we can just wait for more blocks.
4953 pub fn funding_transaction_unconfirmed<L: Deref>(&mut self, logger: &L) -> Result<(), ClosureReason> where L::Target: Logger {
4954 if self.funding_tx_confirmation_height != 0 {
4955 // We handle the funding disconnection by calling best_block_updated with a height one
4956 // below where our funding was connected, implying a reorg back to conf_height - 1.
4957 let reorg_height = self.funding_tx_confirmation_height - 1;
4958 // We use the time field to bump the current time we set on channel updates if its
4959 // larger. If we don't know that time has moved forward, we can just set it to the last
4960 // time we saw and it will be ignored.
4961 let best_time = self.update_time_counter;
4962 match self.do_best_block_updated(reorg_height, best_time, None, logger) {
4963 Ok((channel_ready, timed_out_htlcs, announcement_sigs)) => {
4964 assert!(channel_ready.is_none(), "We can't generate a funding with 0 confirmations?");
4965 assert!(timed_out_htlcs.is_empty(), "We can't have accepted HTLCs with a timeout before our funding confirmation?");
4966 assert!(announcement_sigs.is_none(), "We can't generate an announcement_sigs with 0 confirmations?");
4972 // We never learned about the funding confirmation anyway, just ignore
4977 // Methods to get unprompted messages to send to the remote end (or where we already returned
4978 // something in the handler for the message that prompted this message):
4980 pub fn get_open_channel(&self, chain_hash: BlockHash) -> msgs::OpenChannel {
4981 if !self.is_outbound() {
4982 panic!("Tried to open a channel for an inbound channel?");
4984 if self.channel_state != ChannelState::OurInitSent as u32 {
4985 panic!("Cannot generate an open_channel after we've moved forward");
4988 if self.cur_holder_commitment_transaction_number != INITIAL_COMMITMENT_NUMBER {
4989 panic!("Tried to send an open_channel for a channel that has already advanced");
4992 let first_per_commitment_point = self.holder_signer.get_per_commitment_point(self.cur_holder_commitment_transaction_number, &self.secp_ctx);
4993 let keys = self.get_holder_pubkeys();
4997 temporary_channel_id: self.channel_id,
4998 funding_satoshis: self.channel_value_satoshis,
4999 push_msat: self.channel_value_satoshis * 1000 - self.value_to_self_msat,
5000 dust_limit_satoshis: self.holder_dust_limit_satoshis,
5001 max_htlc_value_in_flight_msat: self.holder_max_htlc_value_in_flight_msat,
5002 channel_reserve_satoshis: self.holder_selected_channel_reserve_satoshis,
5003 htlc_minimum_msat: self.holder_htlc_minimum_msat,
5004 feerate_per_kw: self.feerate_per_kw as u32,
5005 to_self_delay: self.get_holder_selected_contest_delay(),
5006 max_accepted_htlcs: OUR_MAX_HTLCS,
5007 funding_pubkey: keys.funding_pubkey,
5008 revocation_basepoint: keys.revocation_basepoint,
5009 payment_point: keys.payment_point,
5010 delayed_payment_basepoint: keys.delayed_payment_basepoint,
5011 htlc_basepoint: keys.htlc_basepoint,
5012 first_per_commitment_point,
5013 channel_flags: if self.config.announced_channel {1} else {0},
5014 shutdown_scriptpubkey: OptionalField::Present(match &self.shutdown_scriptpubkey {
5015 Some(script) => script.clone().into_inner(),
5016 None => Builder::new().into_script(),
5018 channel_type: Some(self.channel_type.clone()),
5022 pub fn inbound_is_awaiting_accept(&self) -> bool {
5023 self.inbound_awaiting_accept
5026 /// Sets this channel to accepting 0conf, must be done before `get_accept_channel`
5027 pub fn set_0conf(&mut self) {
5028 assert!(self.inbound_awaiting_accept);
5029 self.minimum_depth = Some(0);
5032 /// Marks an inbound channel as accepted and generates a [`msgs::AcceptChannel`] message which
5033 /// should be sent back to the counterparty node.
5035 /// [`msgs::AcceptChannel`]: crate::ln::msgs::AcceptChannel
5036 pub fn accept_inbound_channel(&mut self, user_id: u64) -> msgs::AcceptChannel {
5037 if self.is_outbound() {
5038 panic!("Tried to send accept_channel for an outbound channel?");
5040 if self.channel_state != (ChannelState::OurInitSent as u32) | (ChannelState::TheirInitSent as u32) {
5041 panic!("Tried to send accept_channel after channel had moved forward");
5043 if self.cur_holder_commitment_transaction_number != INITIAL_COMMITMENT_NUMBER {
5044 panic!("Tried to send an accept_channel for a channel that has already advanced");
5046 if !self.inbound_awaiting_accept {
5047 panic!("The inbound channel has already been accepted");
5050 self.user_id = user_id;
5051 self.inbound_awaiting_accept = false;
5053 self.generate_accept_channel_message()
5056 /// This function is used to explicitly generate a [`msgs::AcceptChannel`] message for an
5057 /// inbound channel. If the intention is to accept an inbound channel, use
5058 /// [`Channel::accept_inbound_channel`] instead.
5060 /// [`msgs::AcceptChannel`]: crate::ln::msgs::AcceptChannel
5061 fn generate_accept_channel_message(&self) -> msgs::AcceptChannel {
5062 let first_per_commitment_point = self.holder_signer.get_per_commitment_point(self.cur_holder_commitment_transaction_number, &self.secp_ctx);
5063 let keys = self.get_holder_pubkeys();
5065 msgs::AcceptChannel {
5066 temporary_channel_id: self.channel_id,
5067 dust_limit_satoshis: self.holder_dust_limit_satoshis,
5068 max_htlc_value_in_flight_msat: self.holder_max_htlc_value_in_flight_msat,
5069 channel_reserve_satoshis: self.holder_selected_channel_reserve_satoshis,
5070 htlc_minimum_msat: self.holder_htlc_minimum_msat,
5071 minimum_depth: self.minimum_depth.unwrap(),
5072 to_self_delay: self.get_holder_selected_contest_delay(),
5073 max_accepted_htlcs: OUR_MAX_HTLCS,
5074 funding_pubkey: keys.funding_pubkey,
5075 revocation_basepoint: keys.revocation_basepoint,
5076 payment_point: keys.payment_point,
5077 delayed_payment_basepoint: keys.delayed_payment_basepoint,
5078 htlc_basepoint: keys.htlc_basepoint,
5079 first_per_commitment_point,
5080 shutdown_scriptpubkey: OptionalField::Present(match &self.shutdown_scriptpubkey {
5081 Some(script) => script.clone().into_inner(),
5082 None => Builder::new().into_script(),
5084 channel_type: Some(self.channel_type.clone()),
5088 /// Enables the possibility for tests to extract a [`msgs::AcceptChannel`] message for an
5089 /// inbound channel without accepting it.
5091 /// [`msgs::AcceptChannel`]: crate::ln::msgs::AcceptChannel
5093 pub fn get_accept_channel_message(&self) -> msgs::AcceptChannel {
5094 self.generate_accept_channel_message()
5097 /// If an Err is returned, it is a ChannelError::Close (for get_outbound_funding_created)
5098 fn get_outbound_funding_created_signature<L: Deref>(&mut self, logger: &L) -> Result<Signature, ChannelError> where L::Target: Logger {
5099 let counterparty_keys = self.build_remote_transaction_keys()?;
5100 let counterparty_initial_commitment_tx = self.build_commitment_transaction(self.cur_counterparty_commitment_transaction_number, &counterparty_keys, false, false, logger).tx;
5101 Ok(self.holder_signer.sign_counterparty_commitment(&counterparty_initial_commitment_tx, Vec::new(), &self.secp_ctx)
5102 .map_err(|_| ChannelError::Close("Failed to get signatures for new commitment_signed".to_owned()))?.0)
5105 /// Updates channel state with knowledge of the funding transaction's txid/index, and generates
5106 /// a funding_created message for the remote peer.
5107 /// Panics if called at some time other than immediately after initial handshake, if called twice,
5108 /// or if called on an inbound channel.
5109 /// Note that channel_id changes during this call!
5110 /// Do NOT broadcast the funding transaction until after a successful funding_signed call!
5111 /// If an Err is returned, it is a ChannelError::Close.
5112 pub fn get_outbound_funding_created<L: Deref>(&mut self, funding_transaction: Transaction, funding_txo: OutPoint, logger: &L) -> Result<msgs::FundingCreated, ChannelError> where L::Target: Logger {
5113 if !self.is_outbound() {
5114 panic!("Tried to create outbound funding_created message on an inbound channel!");
5116 if self.channel_state != (ChannelState::OurInitSent as u32 | ChannelState::TheirInitSent as u32) {
5117 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)");
5119 if self.commitment_secrets.get_min_seen_secret() != (1 << 48) ||
5120 self.cur_counterparty_commitment_transaction_number != INITIAL_COMMITMENT_NUMBER ||
5121 self.cur_holder_commitment_transaction_number != INITIAL_COMMITMENT_NUMBER {
5122 panic!("Should not have advanced channel commitment tx numbers prior to funding_created");
5125 self.channel_transaction_parameters.funding_outpoint = Some(funding_txo);
5126 self.holder_signer.ready_channel(&self.channel_transaction_parameters);
5128 let signature = match self.get_outbound_funding_created_signature(logger) {
5131 log_error!(logger, "Got bad signatures: {:?}!", e);
5132 self.channel_transaction_parameters.funding_outpoint = None;
5137 let temporary_channel_id = self.channel_id;
5139 // Now that we're past error-generating stuff, update our local state:
5141 self.channel_state = ChannelState::FundingCreated as u32;
5142 self.channel_id = funding_txo.to_channel_id();
5143 self.funding_transaction = Some(funding_transaction);
5145 Ok(msgs::FundingCreated {
5146 temporary_channel_id,
5147 funding_txid: funding_txo.txid,
5148 funding_output_index: funding_txo.index,
5153 /// Gets an UnsignedChannelAnnouncement for this channel. The channel must be publicly
5154 /// announceable and available for use (have exchanged ChannelReady messages in both
5155 /// directions). Should be used for both broadcasted announcements and in response to an
5156 /// AnnouncementSignatures message from the remote peer.
5158 /// Will only fail if we're not in a state where channel_announcement may be sent (including
5161 /// This will only return ChannelError::Ignore upon failure.
5162 fn get_channel_announcement(&self, node_id: PublicKey, chain_hash: BlockHash) -> Result<msgs::UnsignedChannelAnnouncement, ChannelError> {
5163 if !self.config.announced_channel {
5164 return Err(ChannelError::Ignore("Channel is not available for public announcements".to_owned()));
5166 if !self.is_usable() {
5167 return Err(ChannelError::Ignore("Cannot get a ChannelAnnouncement if the channel is not currently usable".to_owned()));
5170 let were_node_one = node_id.serialize()[..] < self.counterparty_node_id.serialize()[..];
5172 let msg = msgs::UnsignedChannelAnnouncement {
5173 features: ChannelFeatures::known(),
5175 short_channel_id: self.get_short_channel_id().unwrap(),
5176 node_id_1: if were_node_one { node_id } else { self.get_counterparty_node_id() },
5177 node_id_2: if were_node_one { self.get_counterparty_node_id() } else { node_id },
5178 bitcoin_key_1: if were_node_one { self.get_holder_pubkeys().funding_pubkey } else { self.counterparty_funding_pubkey().clone() },
5179 bitcoin_key_2: if were_node_one { self.counterparty_funding_pubkey().clone() } else { self.get_holder_pubkeys().funding_pubkey },
5180 excess_data: Vec::new(),
5186 fn get_announcement_sigs<L: Deref>(&mut self, node_pk: PublicKey, genesis_block_hash: BlockHash, best_block_height: u32, logger: &L)
5187 -> Option<msgs::AnnouncementSignatures> where L::Target: Logger {
5188 if self.funding_tx_confirmation_height == 0 || self.funding_tx_confirmation_height + 5 > best_block_height {
5192 if !self.is_usable() {
5196 if self.channel_state & ChannelState::PeerDisconnected as u32 != 0 {
5197 log_trace!(logger, "Cannot create an announcement_signatures as our peer is disconnected");
5201 if self.announcement_sigs_state != AnnouncementSigsState::NotSent {
5205 log_trace!(logger, "Creating an announcement_signatures message for channel {}", log_bytes!(self.channel_id()));
5206 let announcement = match self.get_channel_announcement(node_pk, genesis_block_hash) {
5209 log_trace!(logger, "Cannot create an announcement_signatures as channel is not public.");
5213 let (our_node_sig, our_bitcoin_sig) = match self.holder_signer.sign_channel_announcement(&announcement, &self.secp_ctx) {
5215 log_error!(logger, "Signer rejected channel_announcement signing. Channel will not be announced!");
5220 self.announcement_sigs_state = AnnouncementSigsState::MessageSent;
5222 Some(msgs::AnnouncementSignatures {
5223 channel_id: self.channel_id(),
5224 short_channel_id: self.get_short_channel_id().unwrap(),
5225 node_signature: our_node_sig,
5226 bitcoin_signature: our_bitcoin_sig,
5230 /// Signs the given channel announcement, returning a ChannelError::Ignore if no keys are
5232 fn sign_channel_announcement(&self, our_node_id: PublicKey, announcement: msgs::UnsignedChannelAnnouncement) -> Result<msgs::ChannelAnnouncement, ChannelError> {
5233 if let Some((their_node_sig, their_bitcoin_sig)) = self.announcement_sigs {
5234 let were_node_one = announcement.node_id_1 == our_node_id;
5236 let (our_node_sig, our_bitcoin_sig) = self.holder_signer.sign_channel_announcement(&announcement, &self.secp_ctx)
5237 .map_err(|_| ChannelError::Ignore("Signer rejected channel_announcement".to_owned()))?;
5238 Ok(msgs::ChannelAnnouncement {
5239 node_signature_1: if were_node_one { our_node_sig } else { their_node_sig },
5240 node_signature_2: if were_node_one { their_node_sig } else { our_node_sig },
5241 bitcoin_signature_1: if were_node_one { our_bitcoin_sig } else { their_bitcoin_sig },
5242 bitcoin_signature_2: if were_node_one { their_bitcoin_sig } else { our_bitcoin_sig },
5243 contents: announcement,
5246 Err(ChannelError::Ignore("Attempted to sign channel announcement before we'd received announcement_signatures".to_string()))
5250 /// Processes an incoming announcement_signatures message, providing a fully-signed
5251 /// channel_announcement message which we can broadcast and storing our counterparty's
5252 /// signatures for later reconstruction/rebroadcast of the channel_announcement.
5253 pub fn announcement_signatures(&mut self, our_node_id: PublicKey, chain_hash: BlockHash, best_block_height: u32, msg: &msgs::AnnouncementSignatures) -> Result<msgs::ChannelAnnouncement, ChannelError> {
5254 let announcement = self.get_channel_announcement(our_node_id.clone(), chain_hash)?;
5256 let msghash = hash_to_message!(&Sha256d::hash(&announcement.encode()[..])[..]);
5258 if self.secp_ctx.verify_ecdsa(&msghash, &msg.node_signature, &self.get_counterparty_node_id()).is_err() {
5259 return Err(ChannelError::Close(format!(
5260 "Bad announcement_signatures. Failed to verify node_signature. UnsignedChannelAnnouncement used for verification is {:?}. their_node_key is {:?}",
5261 &announcement, self.get_counterparty_node_id())));
5263 if self.secp_ctx.verify_ecdsa(&msghash, &msg.bitcoin_signature, self.counterparty_funding_pubkey()).is_err() {
5264 return Err(ChannelError::Close(format!(
5265 "Bad announcement_signatures. Failed to verify bitcoin_signature. UnsignedChannelAnnouncement used for verification is {:?}. their_bitcoin_key is ({:?})",
5266 &announcement, self.counterparty_funding_pubkey())));
5269 self.announcement_sigs = Some((msg.node_signature, msg.bitcoin_signature));
5270 if self.funding_tx_confirmation_height == 0 || self.funding_tx_confirmation_height + 5 > best_block_height {
5271 return Err(ChannelError::Ignore(
5272 "Got announcement_signatures prior to the required six confirmations - we may not have received a block yet that our peer has".to_owned()));
5275 self.sign_channel_announcement(our_node_id, announcement)
5278 /// Gets a signed channel_announcement for this channel, if we previously received an
5279 /// announcement_signatures from our counterparty.
5280 pub fn get_signed_channel_announcement(&self, our_node_id: PublicKey, chain_hash: BlockHash, best_block_height: u32) -> Option<msgs::ChannelAnnouncement> {
5281 if self.funding_tx_confirmation_height == 0 || self.funding_tx_confirmation_height + 5 > best_block_height {
5284 let announcement = match self.get_channel_announcement(our_node_id.clone(), chain_hash) {
5286 Err(_) => return None,
5288 match self.sign_channel_announcement(our_node_id, announcement) {
5289 Ok(res) => Some(res),
5294 /// May panic if called on a channel that wasn't immediately-previously
5295 /// self.remove_uncommitted_htlcs_and_mark_paused()'d
5296 pub fn get_channel_reestablish<L: Deref>(&self, logger: &L) -> msgs::ChannelReestablish where L::Target: Logger {
5297 assert_eq!(self.channel_state & ChannelState::PeerDisconnected as u32, ChannelState::PeerDisconnected as u32);
5298 assert_ne!(self.cur_counterparty_commitment_transaction_number, INITIAL_COMMITMENT_NUMBER);
5299 // Prior to static_remotekey, my_current_per_commitment_point was critical to claiming
5300 // current to_remote balances. However, it no longer has any use, and thus is now simply
5301 // set to a dummy (but valid, as required by the spec) public key.
5302 // fuzzing mode marks a subset of pubkeys as invalid so that we can hit "invalid pubkey"
5303 // branches, but we unwrap it below, so we arbitrarily select a dummy pubkey which is both
5304 // valid, and valid in fuzzing mode's arbitrary validity criteria:
5305 let mut pk = [2; 33]; pk[1] = 0xff;
5306 let dummy_pubkey = PublicKey::from_slice(&pk).unwrap();
5307 let data_loss_protect = if self.cur_counterparty_commitment_transaction_number + 1 < INITIAL_COMMITMENT_NUMBER {
5308 let remote_last_secret = self.commitment_secrets.get_secret(self.cur_counterparty_commitment_transaction_number + 2).unwrap();
5309 log_trace!(logger, "Enough info to generate a Data Loss Protect with per_commitment_secret {} for channel {}", log_bytes!(remote_last_secret), log_bytes!(self.channel_id()));
5310 OptionalField::Present(DataLossProtect {
5311 your_last_per_commitment_secret: remote_last_secret,
5312 my_current_per_commitment_point: dummy_pubkey
5315 log_info!(logger, "Sending a data_loss_protect with no previous remote per_commitment_secret for channel {}", log_bytes!(self.channel_id()));
5316 OptionalField::Present(DataLossProtect {
5317 your_last_per_commitment_secret: [0;32],
5318 my_current_per_commitment_point: dummy_pubkey,
5321 msgs::ChannelReestablish {
5322 channel_id: self.channel_id(),
5323 // The protocol has two different commitment number concepts - the "commitment
5324 // transaction number", which starts from 0 and counts up, and the "revocation key
5325 // index" which starts at INITIAL_COMMITMENT_NUMBER and counts down. We track
5326 // commitment transaction numbers by the index which will be used to reveal the
5327 // revocation key for that commitment transaction, which means we have to convert them
5328 // to protocol-level commitment numbers here...
5330 // next_local_commitment_number is the next commitment_signed number we expect to
5331 // receive (indicating if they need to resend one that we missed).
5332 next_local_commitment_number: INITIAL_COMMITMENT_NUMBER - self.cur_holder_commitment_transaction_number,
5333 // We have to set next_remote_commitment_number to the next revoke_and_ack we expect to
5334 // receive, however we track it by the next commitment number for a remote transaction
5335 // (which is one further, as they always revoke previous commitment transaction, not
5336 // the one we send) so we have to decrement by 1. Note that if
5337 // cur_counterparty_commitment_transaction_number is INITIAL_COMMITMENT_NUMBER we will have
5338 // dropped this channel on disconnect as it hasn't yet reached FundingSent so we can't
5340 next_remote_commitment_number: INITIAL_COMMITMENT_NUMBER - self.cur_counterparty_commitment_transaction_number - 1,
5346 // Send stuff to our remote peers:
5348 /// Adds a pending outbound HTLC to this channel, note that you probably want
5349 /// send_htlc_and_commit instead cause you'll want both messages at once.
5351 /// This returns an optional UpdateAddHTLC as we may be in a state where we cannot add HTLCs on
5353 /// * In cases where we're waiting on the remote peer to send us a revoke_and_ack, we
5354 /// wouldn't be able to determine what they actually ACK'ed if we have two sets of updates
5356 /// * In cases where we're marked MonitorUpdateFailed, we cannot commit to a new state as we
5357 /// may not yet have sent the previous commitment update messages and will need to regenerate
5360 /// You MUST call send_commitment prior to calling any other methods on this Channel!
5362 /// If an Err is returned, it's a ChannelError::Ignore!
5363 pub fn send_htlc<L: Deref>(&mut self, amount_msat: u64, payment_hash: PaymentHash, cltv_expiry: u32, source: HTLCSource, onion_routing_packet: msgs::OnionPacket, logger: &L) -> Result<Option<msgs::UpdateAddHTLC>, ChannelError> where L::Target: Logger {
5364 if (self.channel_state & (ChannelState::ChannelFunded as u32 | BOTH_SIDES_SHUTDOWN_MASK)) != (ChannelState::ChannelFunded as u32) {
5365 return Err(ChannelError::Ignore("Cannot send HTLC until channel is fully established and we haven't started shutting down".to_owned()));
5367 let channel_total_msat = self.channel_value_satoshis * 1000;
5368 if amount_msat > channel_total_msat {
5369 return Err(ChannelError::Ignore(format!("Cannot send amount {}, because it is more than the total value of the channel {}", amount_msat, channel_total_msat)));
5372 if amount_msat == 0 {
5373 return Err(ChannelError::Ignore("Cannot send 0-msat HTLC".to_owned()));
5376 if amount_msat < self.counterparty_htlc_minimum_msat {
5377 return Err(ChannelError::Ignore(format!("Cannot send less than their minimum HTLC value ({})", self.counterparty_htlc_minimum_msat)));
5380 if (self.channel_state & (ChannelState::PeerDisconnected as u32)) != 0 {
5381 // Note that this should never really happen, if we're !is_live() on receipt of an
5382 // incoming HTLC for relay will result in us rejecting the HTLC and we won't allow
5383 // the user to send directly into a !is_live() channel. However, if we
5384 // disconnected during the time the previous hop was doing the commitment dance we may
5385 // end up getting here after the forwarding delay. In any case, returning an
5386 // IgnoreError will get ChannelManager to do the right thing and fail backwards now.
5387 return Err(ChannelError::Ignore("Cannot send an HTLC while disconnected from channel counterparty".to_owned()));
5390 let inbound_stats = self.get_inbound_pending_htlc_stats(None);
5391 let outbound_stats = self.get_outbound_pending_htlc_stats(None);
5392 if outbound_stats.pending_htlcs + 1 > self.counterparty_max_accepted_htlcs as u32 {
5393 return Err(ChannelError::Ignore(format!("Cannot push more than their max accepted HTLCs ({})", self.counterparty_max_accepted_htlcs)));
5395 // Check their_max_htlc_value_in_flight_msat
5396 if outbound_stats.pending_htlcs_value_msat + amount_msat > self.counterparty_max_htlc_value_in_flight_msat {
5397 return Err(ChannelError::Ignore(format!("Cannot send value that would put us over the max HTLC value in flight our peer will accept ({})", self.counterparty_max_htlc_value_in_flight_msat)));
5400 let keys = self.build_holder_transaction_keys(self.cur_holder_commitment_transaction_number)?;
5401 let commitment_stats = self.build_commitment_transaction(self.cur_holder_commitment_transaction_number, &keys, true, true, logger);
5402 if !self.is_outbound() {
5403 // Check that we won't violate the remote channel reserve by adding this HTLC.
5404 let htlc_candidate = HTLCCandidate::new(amount_msat, HTLCInitiator::LocalOffered);
5405 let counterparty_commit_tx_fee_msat = self.next_remote_commit_tx_fee_msat(htlc_candidate, None);
5406 let holder_selected_chan_reserve_msat = self.holder_selected_channel_reserve_satoshis * 1000;
5407 if commitment_stats.remote_balance_msat < counterparty_commit_tx_fee_msat + holder_selected_chan_reserve_msat {
5408 return Err(ChannelError::Ignore("Cannot send value that would put counterparty balance under holder-announced channel reserve value".to_owned()));
5412 let exposure_dust_limit_success_sats = (self.get_dust_buffer_feerate(None) as u64 * htlc_success_tx_weight(self.opt_anchors()) / 1000) + self.counterparty_dust_limit_satoshis;
5413 if amount_msat / 1000 < exposure_dust_limit_success_sats {
5414 let on_counterparty_dust_htlc_exposure_msat = inbound_stats.on_counterparty_tx_dust_exposure_msat + outbound_stats.on_counterparty_tx_dust_exposure_msat + amount_msat;
5415 if on_counterparty_dust_htlc_exposure_msat > self.get_max_dust_htlc_exposure_msat() {
5416 return Err(ChannelError::Ignore(format!("Cannot send value that would put our exposure to dust HTLCs at {} over the limit {} on counterparty commitment tx",
5417 on_counterparty_dust_htlc_exposure_msat, self.get_max_dust_htlc_exposure_msat())));
5421 let exposure_dust_limit_timeout_sats = (self.get_dust_buffer_feerate(None) as u64 * htlc_timeout_tx_weight(self.opt_anchors()) / 1000) + self.holder_dust_limit_satoshis;
5422 if amount_msat / 1000 < exposure_dust_limit_timeout_sats {
5423 let on_holder_dust_htlc_exposure_msat = inbound_stats.on_holder_tx_dust_exposure_msat + outbound_stats.on_holder_tx_dust_exposure_msat + amount_msat;
5424 if on_holder_dust_htlc_exposure_msat > self.get_max_dust_htlc_exposure_msat() {
5425 return Err(ChannelError::Ignore(format!("Cannot send value that would put our exposure to dust HTLCs at {} over the limit {} on holder commitment tx",
5426 on_holder_dust_htlc_exposure_msat, self.get_max_dust_htlc_exposure_msat())));
5430 let holder_balance_msat = commitment_stats.local_balance_msat - outbound_stats.holding_cell_msat;
5431 if holder_balance_msat < amount_msat {
5432 return Err(ChannelError::Ignore(format!("Cannot send value that would overdraw remaining funds. Amount: {}, pending value to self {}", amount_msat, holder_balance_msat)));
5435 // `2 *` and extra HTLC are for the fee spike buffer.
5436 let commit_tx_fee_msat = if self.is_outbound() {
5437 let htlc_candidate = HTLCCandidate::new(amount_msat, HTLCInitiator::LocalOffered);
5438 FEE_SPIKE_BUFFER_FEE_INCREASE_MULTIPLE * self.next_local_commit_tx_fee_msat(htlc_candidate, Some(()))
5440 if holder_balance_msat - amount_msat < commit_tx_fee_msat {
5441 return Err(ChannelError::Ignore(format!("Cannot send value that would not leave enough to pay for fees. Pending value to self: {}. local_commit_tx_fee {}", holder_balance_msat, commit_tx_fee_msat)));
5444 // Check self.counterparty_selected_channel_reserve_satoshis (the amount we must keep as
5445 // reserve for the remote to have something to claim if we misbehave)
5446 let chan_reserve_msat = self.counterparty_selected_channel_reserve_satoshis.unwrap() * 1000;
5447 if holder_balance_msat - amount_msat - commit_tx_fee_msat < chan_reserve_msat {
5448 return Err(ChannelError::Ignore(format!("Cannot send value that would put our balance under counterparty-announced channel reserve value ({})", chan_reserve_msat)));
5451 // Now update local state:
5452 if (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32 | ChannelState::MonitorUpdateFailed as u32)) != 0 {
5453 self.holding_cell_htlc_updates.push(HTLCUpdateAwaitingACK::AddHTLC {
5458 onion_routing_packet,
5463 self.pending_outbound_htlcs.push(OutboundHTLCOutput {
5464 htlc_id: self.next_holder_htlc_id,
5466 payment_hash: payment_hash.clone(),
5468 state: OutboundHTLCState::LocalAnnounced(Box::new(onion_routing_packet.clone())),
5472 let res = msgs::UpdateAddHTLC {
5473 channel_id: self.channel_id,
5474 htlc_id: self.next_holder_htlc_id,
5478 onion_routing_packet,
5480 self.next_holder_htlc_id += 1;
5485 /// Creates a signed commitment transaction to send to the remote peer.
5486 /// Always returns a ChannelError::Close if an immediately-preceding (read: the
5487 /// last call to this Channel) send_htlc returned Ok(Some(_)) and there is an Err.
5488 /// May panic if called except immediately after a successful, Ok(Some(_))-returning send_htlc.
5489 pub fn send_commitment<L: Deref>(&mut self, logger: &L) -> Result<(msgs::CommitmentSigned, ChannelMonitorUpdate), ChannelError> where L::Target: Logger {
5490 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
5491 panic!("Cannot create commitment tx until channel is fully established");
5493 if (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32)) == (ChannelState::AwaitingRemoteRevoke as u32) {
5494 panic!("Cannot create commitment tx until remote revokes their previous commitment");
5496 if (self.channel_state & (ChannelState::PeerDisconnected as u32)) == (ChannelState::PeerDisconnected as u32) {
5497 panic!("Cannot create commitment tx while disconnected, as send_htlc will have returned an Err so a send_commitment precondition has been violated");
5499 if (self.channel_state & (ChannelState::MonitorUpdateFailed as u32)) == (ChannelState::MonitorUpdateFailed as u32) {
5500 panic!("Cannot create commitment tx while awaiting monitor update unfreeze, as send_htlc will have returned an Err so a send_commitment precondition has been violated");
5502 let mut have_updates = self.is_outbound() && self.pending_update_fee.is_some();
5503 for htlc in self.pending_outbound_htlcs.iter() {
5504 if let OutboundHTLCState::LocalAnnounced(_) = htlc.state {
5505 have_updates = true;
5507 if have_updates { break; }
5509 for htlc in self.pending_inbound_htlcs.iter() {
5510 if let InboundHTLCState::LocalRemoved(_) = htlc.state {
5511 have_updates = true;
5513 if have_updates { break; }
5516 panic!("Cannot create commitment tx until we have some updates to send");
5518 self.send_commitment_no_status_check(logger)
5520 /// Only fails in case of bad keys
5521 fn send_commitment_no_status_check<L: Deref>(&mut self, logger: &L) -> Result<(msgs::CommitmentSigned, ChannelMonitorUpdate), ChannelError> where L::Target: Logger {
5522 log_trace!(logger, "Updating HTLC state for a newly-sent commitment_signed...");
5523 // We can upgrade the status of some HTLCs that are waiting on a commitment, even if we
5524 // fail to generate this, we still are at least at a position where upgrading their status
5526 for htlc in self.pending_inbound_htlcs.iter_mut() {
5527 let new_state = if let &InboundHTLCState::AwaitingRemoteRevokeToAnnounce(ref forward_info) = &htlc.state {
5528 Some(InboundHTLCState::AwaitingAnnouncedRemoteRevoke(forward_info.clone()))
5530 if let Some(state) = new_state {
5531 log_trace!(logger, " ...promoting inbound AwaitingRemoteRevokeToAnnounce {} to AwaitingAnnouncedRemoteRevoke", log_bytes!(htlc.payment_hash.0));
5535 for htlc in self.pending_outbound_htlcs.iter_mut() {
5536 if let &mut OutboundHTLCState::AwaitingRemoteRevokeToRemove(ref mut outcome) = &mut htlc.state {
5537 log_trace!(logger, " ...promoting outbound AwaitingRemoteRevokeToRemove {} to AwaitingRemovedRemoteRevoke", log_bytes!(htlc.payment_hash.0));
5538 // Grab the preimage, if it exists, instead of cloning
5539 let mut reason = OutboundHTLCOutcome::Success(None);
5540 mem::swap(outcome, &mut reason);
5541 htlc.state = OutboundHTLCState::AwaitingRemovedRemoteRevoke(reason);
5544 if let Some((feerate, update_state)) = self.pending_update_fee {
5545 if update_state == FeeUpdateState::AwaitingRemoteRevokeToAnnounce {
5546 debug_assert!(!self.is_outbound());
5547 log_trace!(logger, " ...promoting inbound AwaitingRemoteRevokeToAnnounce fee update {} to Committed", feerate);
5548 self.feerate_per_kw = feerate;
5549 self.pending_update_fee = None;
5552 self.resend_order = RAACommitmentOrder::RevokeAndACKFirst;
5554 let (res, counterparty_commitment_txid, htlcs) = match self.send_commitment_no_state_update(logger) {
5555 Ok((res, (counterparty_commitment_tx, mut htlcs))) => {
5556 // Update state now that we've passed all the can-fail calls...
5557 let htlcs_no_ref: Vec<(HTLCOutputInCommitment, Option<Box<HTLCSource>>)> =
5558 htlcs.drain(..).map(|(htlc, htlc_source)| (htlc, htlc_source.map(|source_ref| Box::new(source_ref.clone())))).collect();
5559 (res, counterparty_commitment_tx, htlcs_no_ref)
5561 Err(e) => return Err(e),
5564 if self.announcement_sigs_state == AnnouncementSigsState::MessageSent {
5565 self.announcement_sigs_state = AnnouncementSigsState::Committed;
5568 self.latest_monitor_update_id += 1;
5569 let monitor_update = ChannelMonitorUpdate {
5570 update_id: self.latest_monitor_update_id,
5571 updates: vec![ChannelMonitorUpdateStep::LatestCounterpartyCommitmentTXInfo {
5572 commitment_txid: counterparty_commitment_txid,
5573 htlc_outputs: htlcs.clone(),
5574 commitment_number: self.cur_counterparty_commitment_transaction_number,
5575 their_per_commitment_point: self.counterparty_cur_commitment_point.unwrap()
5578 self.channel_state |= ChannelState::AwaitingRemoteRevoke as u32;
5579 Ok((res, monitor_update))
5582 /// Only fails in case of bad keys. Used for channel_reestablish commitment_signed generation
5583 /// when we shouldn't change HTLC/channel state.
5584 fn send_commitment_no_state_update<L: Deref>(&self, logger: &L) -> Result<(msgs::CommitmentSigned, (Txid, Vec<(HTLCOutputInCommitment, Option<&HTLCSource>)>)), ChannelError> where L::Target: Logger {
5585 let counterparty_keys = self.build_remote_transaction_keys()?;
5586 let commitment_stats = self.build_commitment_transaction(self.cur_counterparty_commitment_transaction_number, &counterparty_keys, false, true, logger);
5587 let counterparty_commitment_txid = commitment_stats.tx.trust().txid();
5588 let (signature, htlc_signatures);
5590 #[cfg(any(test, fuzzing))]
5592 if !self.is_outbound() {
5593 let projected_commit_tx_info = self.next_remote_commitment_tx_fee_info_cached.lock().unwrap().take();
5594 *self.next_local_commitment_tx_fee_info_cached.lock().unwrap() = None;
5595 if let Some(info) = projected_commit_tx_info {
5596 let total_pending_htlcs = self.pending_inbound_htlcs.len() + self.pending_outbound_htlcs.len();
5597 if info.total_pending_htlcs == total_pending_htlcs
5598 && info.next_holder_htlc_id == self.next_holder_htlc_id
5599 && info.next_counterparty_htlc_id == self.next_counterparty_htlc_id
5600 && info.feerate == self.feerate_per_kw {
5601 let actual_fee = Self::commit_tx_fee_msat(self.feerate_per_kw, commitment_stats.num_nondust_htlcs, self.opt_anchors());
5602 assert_eq!(actual_fee, info.fee);
5609 let mut htlcs = Vec::with_capacity(commitment_stats.htlcs_included.len());
5610 for &(ref htlc, _) in commitment_stats.htlcs_included.iter() {
5614 let res = self.holder_signer.sign_counterparty_commitment(&commitment_stats.tx, commitment_stats.preimages, &self.secp_ctx)
5615 .map_err(|_| ChannelError::Close("Failed to get signatures for new commitment_signed".to_owned()))?;
5617 htlc_signatures = res.1;
5619 log_trace!(logger, "Signed remote commitment tx {} (txid {}) with redeemscript {} -> {} in channel {}",
5620 encode::serialize_hex(&commitment_stats.tx.trust().built_transaction().transaction),
5621 &counterparty_commitment_txid, encode::serialize_hex(&self.get_funding_redeemscript()),
5622 log_bytes!(signature.serialize_compact()[..]), log_bytes!(self.channel_id()));
5624 for (ref htlc_sig, ref htlc) in htlc_signatures.iter().zip(htlcs) {
5625 log_trace!(logger, "Signed remote HTLC tx {} with redeemscript {} with pubkey {} -> {} in channel {}",
5626 encode::serialize_hex(&chan_utils::build_htlc_transaction(&counterparty_commitment_txid, commitment_stats.feerate_per_kw, self.get_holder_selected_contest_delay(), htlc, self.opt_anchors(), &counterparty_keys.broadcaster_delayed_payment_key, &counterparty_keys.revocation_key)),
5627 encode::serialize_hex(&chan_utils::get_htlc_redeemscript(&htlc, self.opt_anchors(), &counterparty_keys)),
5628 log_bytes!(counterparty_keys.broadcaster_htlc_key.serialize()),
5629 log_bytes!(htlc_sig.serialize_compact()[..]), log_bytes!(self.channel_id()));
5633 Ok((msgs::CommitmentSigned {
5634 channel_id: self.channel_id,
5637 }, (counterparty_commitment_txid, commitment_stats.htlcs_included)))
5640 /// Adds a pending outbound HTLC to this channel, and creates a signed commitment transaction
5641 /// to send to the remote peer in one go.
5642 /// Shorthand for calling send_htlc() followed by send_commitment(), see docs on those for
5644 pub fn send_htlc_and_commit<L: Deref>(&mut self, amount_msat: u64, payment_hash: PaymentHash, cltv_expiry: u32, source: HTLCSource, onion_routing_packet: msgs::OnionPacket, logger: &L) -> Result<Option<(msgs::UpdateAddHTLC, msgs::CommitmentSigned, ChannelMonitorUpdate)>, ChannelError> where L::Target: Logger {
5645 match self.send_htlc(amount_msat, payment_hash, cltv_expiry, source, onion_routing_packet, logger)? {
5646 Some(update_add_htlc) => {
5647 let (commitment_signed, monitor_update) = self.send_commitment_no_status_check(logger)?;
5648 Ok(Some((update_add_htlc, commitment_signed, monitor_update)))
5654 /// Get forwarding information for the counterparty.
5655 pub fn counterparty_forwarding_info(&self) -> Option<CounterpartyForwardingInfo> {
5656 self.counterparty_forwarding_info.clone()
5659 pub fn channel_update(&mut self, msg: &msgs::ChannelUpdate) -> Result<(), ChannelError> {
5660 if msg.contents.htlc_minimum_msat >= self.channel_value_satoshis * 1000 {
5661 return Err(ChannelError::Close("Minimum htlc value is greater than channel value".to_string()));
5663 self.counterparty_forwarding_info = Some(CounterpartyForwardingInfo {
5664 fee_base_msat: msg.contents.fee_base_msat,
5665 fee_proportional_millionths: msg.contents.fee_proportional_millionths,
5666 cltv_expiry_delta: msg.contents.cltv_expiry_delta
5672 /// Begins the shutdown process, getting a message for the remote peer and returning all
5673 /// holding cell HTLCs for payment failure.
5674 pub fn get_shutdown<K: Deref>(&mut self, keys_provider: &K, their_features: &InitFeatures, target_feerate_sats_per_kw: Option<u32>)
5675 -> Result<(msgs::Shutdown, Option<ChannelMonitorUpdate>, Vec<(HTLCSource, PaymentHash)>), APIError>
5676 where K::Target: KeysInterface<Signer = Signer> {
5677 for htlc in self.pending_outbound_htlcs.iter() {
5678 if let OutboundHTLCState::LocalAnnounced(_) = htlc.state {
5679 return Err(APIError::APIMisuseError{err: "Cannot begin shutdown with pending HTLCs. Process pending events first".to_owned()});
5682 if self.channel_state & BOTH_SIDES_SHUTDOWN_MASK != 0 {
5683 if (self.channel_state & ChannelState::LocalShutdownSent as u32) == ChannelState::LocalShutdownSent as u32 {
5684 return Err(APIError::APIMisuseError{err: "Shutdown already in progress".to_owned()});
5686 else if (self.channel_state & ChannelState::RemoteShutdownSent as u32) == ChannelState::RemoteShutdownSent as u32 {
5687 return Err(APIError::ChannelUnavailable{err: "Shutdown already in progress by remote".to_owned()});
5690 assert_eq!(self.channel_state & ChannelState::ShutdownComplete as u32, 0);
5691 if self.channel_state & (ChannelState::PeerDisconnected as u32 | ChannelState::MonitorUpdateFailed as u32) != 0 {
5692 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()});
5695 let update_shutdown_script = match self.shutdown_scriptpubkey {
5698 let shutdown_scriptpubkey = keys_provider.get_shutdown_scriptpubkey();
5699 if !shutdown_scriptpubkey.is_compatible(their_features) {
5700 return Err(APIError::IncompatibleShutdownScript { script: shutdown_scriptpubkey.clone() });
5702 self.shutdown_scriptpubkey = Some(shutdown_scriptpubkey);
5707 // From here on out, we may not fail!
5708 self.target_closing_feerate_sats_per_kw = target_feerate_sats_per_kw;
5709 if self.channel_state < ChannelState::FundingSent as u32 {
5710 self.channel_state = ChannelState::ShutdownComplete as u32;
5712 self.channel_state |= ChannelState::LocalShutdownSent as u32;
5714 self.update_time_counter += 1;
5716 let monitor_update = if update_shutdown_script {
5717 self.latest_monitor_update_id += 1;
5718 Some(ChannelMonitorUpdate {
5719 update_id: self.latest_monitor_update_id,
5720 updates: vec![ChannelMonitorUpdateStep::ShutdownScript {
5721 scriptpubkey: self.get_closing_scriptpubkey(),
5725 let shutdown = msgs::Shutdown {
5726 channel_id: self.channel_id,
5727 scriptpubkey: self.get_closing_scriptpubkey(),
5730 // Go ahead and drop holding cell updates as we'd rather fail payments than wait to send
5731 // our shutdown until we've committed all of the pending changes.
5732 self.holding_cell_update_fee = None;
5733 let mut dropped_outbound_htlcs = Vec::with_capacity(self.holding_cell_htlc_updates.len());
5734 self.holding_cell_htlc_updates.retain(|htlc_update| {
5736 &HTLCUpdateAwaitingACK::AddHTLC { ref payment_hash, ref source, .. } => {
5737 dropped_outbound_htlcs.push((source.clone(), payment_hash.clone()));
5744 Ok((shutdown, monitor_update, dropped_outbound_htlcs))
5747 /// Gets the latest commitment transaction and any dependent transactions for relay (forcing
5748 /// shutdown of this channel - no more calls into this Channel may be made afterwards except
5749 /// those explicitly stated to be allowed after shutdown completes, eg some simple getters).
5750 /// Also returns the list of payment_hashes for channels which we can safely fail backwards
5751 /// immediately (others we will have to allow to time out).
5752 pub fn force_shutdown(&mut self, should_broadcast: bool) -> (Option<(OutPoint, ChannelMonitorUpdate)>, Vec<(HTLCSource, PaymentHash)>) {
5753 // Note that we MUST only generate a monitor update that indicates force-closure - we're
5754 // called during initialization prior to the chain_monitor in the encompassing ChannelManager
5755 // being fully configured in some cases. Thus, its likely any monitor events we generate will
5756 // be delayed in being processed! See the docs for `ChannelManagerReadArgs` for more.
5757 assert!(self.channel_state != ChannelState::ShutdownComplete as u32);
5759 // We go ahead and "free" any holding cell HTLCs or HTLCs we haven't yet committed to and
5760 // return them to fail the payment.
5761 let mut dropped_outbound_htlcs = Vec::with_capacity(self.holding_cell_htlc_updates.len());
5762 for htlc_update in self.holding_cell_htlc_updates.drain(..) {
5764 HTLCUpdateAwaitingACK::AddHTLC { source, payment_hash, .. } => {
5765 dropped_outbound_htlcs.push((source, payment_hash));
5770 let monitor_update = if let Some(funding_txo) = self.get_funding_txo() {
5771 // If we haven't yet exchanged funding signatures (ie channel_state < FundingSent),
5772 // returning a channel monitor update here would imply a channel monitor update before
5773 // we even registered the channel monitor to begin with, which is invalid.
5774 // Thus, if we aren't actually at a point where we could conceivably broadcast the
5775 // funding transaction, don't return a funding txo (which prevents providing the
5776 // monitor update to the user, even if we return one).
5777 // See test_duplicate_chan_id and test_pre_lockin_no_chan_closed_update for more.
5778 if self.channel_state & (ChannelState::FundingSent as u32 | ChannelState::ChannelFunded as u32 | ChannelState::ShutdownComplete as u32) != 0 {
5779 self.latest_monitor_update_id += 1;
5780 Some((funding_txo, ChannelMonitorUpdate {
5781 update_id: self.latest_monitor_update_id,
5782 updates: vec![ChannelMonitorUpdateStep::ChannelForceClosed { should_broadcast }],
5787 self.channel_state = ChannelState::ShutdownComplete as u32;
5788 self.update_time_counter += 1;
5789 (monitor_update, dropped_outbound_htlcs)
5793 const SERIALIZATION_VERSION: u8 = 2;
5794 const MIN_SERIALIZATION_VERSION: u8 = 2;
5796 impl_writeable_tlv_based_enum!(InboundHTLCRemovalReason,;
5802 impl Writeable for ChannelUpdateStatus {
5803 fn write<W: Writer>(&self, writer: &mut W) -> Result<(), io::Error> {
5804 // We only care about writing out the current state as it was announced, ie only either
5805 // Enabled or Disabled. In the case of DisabledStaged, we most recently announced the
5806 // channel as enabled, so we write 0. For EnabledStaged, we similarly write a 1.
5808 ChannelUpdateStatus::Enabled => 0u8.write(writer)?,
5809 ChannelUpdateStatus::DisabledStaged => 0u8.write(writer)?,
5810 ChannelUpdateStatus::EnabledStaged => 1u8.write(writer)?,
5811 ChannelUpdateStatus::Disabled => 1u8.write(writer)?,
5817 impl Readable for ChannelUpdateStatus {
5818 fn read<R: io::Read>(reader: &mut R) -> Result<Self, DecodeError> {
5819 Ok(match <u8 as Readable>::read(reader)? {
5820 0 => ChannelUpdateStatus::Enabled,
5821 1 => ChannelUpdateStatus::Disabled,
5822 _ => return Err(DecodeError::InvalidValue),
5827 impl Writeable for AnnouncementSigsState {
5828 fn write<W: Writer>(&self, writer: &mut W) -> Result<(), io::Error> {
5829 // We only care about writing out the current state as if we had just disconnected, at
5830 // which point we always set anything but AnnouncementSigsReceived to NotSent.
5832 AnnouncementSigsState::NotSent => 0u8.write(writer),
5833 AnnouncementSigsState::MessageSent => 0u8.write(writer),
5834 AnnouncementSigsState::Committed => 0u8.write(writer),
5835 AnnouncementSigsState::PeerReceived => 1u8.write(writer),
5840 impl Readable for AnnouncementSigsState {
5841 fn read<R: io::Read>(reader: &mut R) -> Result<Self, DecodeError> {
5842 Ok(match <u8 as Readable>::read(reader)? {
5843 0 => AnnouncementSigsState::NotSent,
5844 1 => AnnouncementSigsState::PeerReceived,
5845 _ => return Err(DecodeError::InvalidValue),
5850 impl<Signer: Sign> Writeable for Channel<Signer> {
5851 fn write<W: Writer>(&self, writer: &mut W) -> Result<(), io::Error> {
5852 // Note that we write out as if remove_uncommitted_htlcs_and_mark_paused had just been
5855 write_ver_prefix!(writer, SERIALIZATION_VERSION, MIN_SERIALIZATION_VERSION);
5857 self.user_id.write(writer)?;
5859 // Version 1 deserializers expected to read parts of the config object here. Version 2
5860 // deserializers (0.0.99) now read config through TLVs, and as we now require them for
5861 // `minimum_depth` we simply write dummy values here.
5862 writer.write_all(&[0; 8])?;
5864 self.channel_id.write(writer)?;
5865 (self.channel_state | ChannelState::PeerDisconnected as u32).write(writer)?;
5866 self.channel_value_satoshis.write(writer)?;
5868 self.latest_monitor_update_id.write(writer)?;
5870 let mut key_data = VecWriter(Vec::new());
5871 self.holder_signer.write(&mut key_data)?;
5872 assert!(key_data.0.len() < core::usize::MAX);
5873 assert!(key_data.0.len() < core::u32::MAX as usize);
5874 (key_data.0.len() as u32).write(writer)?;
5875 writer.write_all(&key_data.0[..])?;
5877 // Write out the old serialization for shutdown_pubkey for backwards compatibility, if
5878 // deserialized from that format.
5879 match self.shutdown_scriptpubkey.as_ref().and_then(|script| script.as_legacy_pubkey()) {
5880 Some(shutdown_pubkey) => shutdown_pubkey.write(writer)?,
5881 None => [0u8; PUBLIC_KEY_SIZE].write(writer)?,
5883 self.destination_script.write(writer)?;
5885 self.cur_holder_commitment_transaction_number.write(writer)?;
5886 self.cur_counterparty_commitment_transaction_number.write(writer)?;
5887 self.value_to_self_msat.write(writer)?;
5889 let mut dropped_inbound_htlcs = 0;
5890 for htlc in self.pending_inbound_htlcs.iter() {
5891 if let InboundHTLCState::RemoteAnnounced(_) = htlc.state {
5892 dropped_inbound_htlcs += 1;
5895 (self.pending_inbound_htlcs.len() as u64 - dropped_inbound_htlcs).write(writer)?;
5896 for htlc in self.pending_inbound_htlcs.iter() {
5897 if let &InboundHTLCState::RemoteAnnounced(_) = &htlc.state {
5900 htlc.htlc_id.write(writer)?;
5901 htlc.amount_msat.write(writer)?;
5902 htlc.cltv_expiry.write(writer)?;
5903 htlc.payment_hash.write(writer)?;
5905 &InboundHTLCState::RemoteAnnounced(_) => unreachable!(),
5906 &InboundHTLCState::AwaitingRemoteRevokeToAnnounce(ref htlc_state) => {
5908 htlc_state.write(writer)?;
5910 &InboundHTLCState::AwaitingAnnouncedRemoteRevoke(ref htlc_state) => {
5912 htlc_state.write(writer)?;
5914 &InboundHTLCState::Committed => {
5917 &InboundHTLCState::LocalRemoved(ref removal_reason) => {
5919 removal_reason.write(writer)?;
5924 let mut preimages: Vec<&Option<PaymentPreimage>> = vec![];
5926 (self.pending_outbound_htlcs.len() as u64).write(writer)?;
5927 for htlc in self.pending_outbound_htlcs.iter() {
5928 htlc.htlc_id.write(writer)?;
5929 htlc.amount_msat.write(writer)?;
5930 htlc.cltv_expiry.write(writer)?;
5931 htlc.payment_hash.write(writer)?;
5932 htlc.source.write(writer)?;
5934 &OutboundHTLCState::LocalAnnounced(ref onion_packet) => {
5936 onion_packet.write(writer)?;
5938 &OutboundHTLCState::Committed => {
5941 &OutboundHTLCState::RemoteRemoved(_) => {
5942 // Treat this as a Committed because we haven't received the CS - they'll
5943 // resend the claim/fail on reconnect as we all (hopefully) the missing CS.
5946 &OutboundHTLCState::AwaitingRemoteRevokeToRemove(ref outcome) => {
5948 if let OutboundHTLCOutcome::Success(preimage) = outcome {
5949 preimages.push(preimage);
5951 let reason: Option<&HTLCFailReason> = outcome.into();
5952 reason.write(writer)?;
5954 &OutboundHTLCState::AwaitingRemovedRemoteRevoke(ref outcome) => {
5956 if let OutboundHTLCOutcome::Success(preimage) = outcome {
5957 preimages.push(preimage);
5959 let reason: Option<&HTLCFailReason> = outcome.into();
5960 reason.write(writer)?;
5965 (self.holding_cell_htlc_updates.len() as u64).write(writer)?;
5966 for update in self.holding_cell_htlc_updates.iter() {
5968 &HTLCUpdateAwaitingACK::AddHTLC { ref amount_msat, ref cltv_expiry, ref payment_hash, ref source, ref onion_routing_packet } => {
5970 amount_msat.write(writer)?;
5971 cltv_expiry.write(writer)?;
5972 payment_hash.write(writer)?;
5973 source.write(writer)?;
5974 onion_routing_packet.write(writer)?;
5976 &HTLCUpdateAwaitingACK::ClaimHTLC { ref payment_preimage, ref htlc_id } => {
5978 payment_preimage.write(writer)?;
5979 htlc_id.write(writer)?;
5981 &HTLCUpdateAwaitingACK::FailHTLC { ref htlc_id, ref err_packet } => {
5983 htlc_id.write(writer)?;
5984 err_packet.write(writer)?;
5989 match self.resend_order {
5990 RAACommitmentOrder::CommitmentFirst => 0u8.write(writer)?,
5991 RAACommitmentOrder::RevokeAndACKFirst => 1u8.write(writer)?,
5994 self.monitor_pending_channel_ready.write(writer)?;
5995 self.monitor_pending_revoke_and_ack.write(writer)?;
5996 self.monitor_pending_commitment_signed.write(writer)?;
5998 (self.monitor_pending_forwards.len() as u64).write(writer)?;
5999 for &(ref pending_forward, ref htlc_id) in self.monitor_pending_forwards.iter() {
6000 pending_forward.write(writer)?;
6001 htlc_id.write(writer)?;
6004 (self.monitor_pending_failures.len() as u64).write(writer)?;
6005 for &(ref htlc_source, ref payment_hash, ref fail_reason) in self.monitor_pending_failures.iter() {
6006 htlc_source.write(writer)?;
6007 payment_hash.write(writer)?;
6008 fail_reason.write(writer)?;
6011 if self.is_outbound() {
6012 self.pending_update_fee.map(|(a, _)| a).write(writer)?;
6013 } else if let Some((feerate, FeeUpdateState::AwaitingRemoteRevokeToAnnounce)) = self.pending_update_fee {
6014 Some(feerate).write(writer)?;
6016 // As for inbound HTLCs, if the update was only announced and never committed in a
6017 // commitment_signed, drop it.
6018 None::<u32>.write(writer)?;
6020 self.holding_cell_update_fee.write(writer)?;
6022 self.next_holder_htlc_id.write(writer)?;
6023 (self.next_counterparty_htlc_id - dropped_inbound_htlcs).write(writer)?;
6024 self.update_time_counter.write(writer)?;
6025 self.feerate_per_kw.write(writer)?;
6027 // Versions prior to 0.0.100 expected to read the fields of `last_sent_closing_fee` here,
6028 // however we are supposed to restart shutdown fee negotiation on reconnect (and wipe
6029 // `last_send_closing_fee` in `remove_uncommitted_htlcs_and_mark_paused`) so we should never
6030 // consider the stale state on reload.
6033 self.funding_tx_confirmed_in.write(writer)?;
6034 self.funding_tx_confirmation_height.write(writer)?;
6035 self.short_channel_id.write(writer)?;
6037 self.counterparty_dust_limit_satoshis.write(writer)?;
6038 self.holder_dust_limit_satoshis.write(writer)?;
6039 self.counterparty_max_htlc_value_in_flight_msat.write(writer)?;
6041 // Note that this field is ignored by 0.0.99+ as the TLV Optional variant is used instead.
6042 self.counterparty_selected_channel_reserve_satoshis.unwrap_or(0).write(writer)?;
6044 self.counterparty_htlc_minimum_msat.write(writer)?;
6045 self.holder_htlc_minimum_msat.write(writer)?;
6046 self.counterparty_max_accepted_htlcs.write(writer)?;
6048 // Note that this field is ignored by 0.0.99+ as the TLV Optional variant is used instead.
6049 self.minimum_depth.unwrap_or(0).write(writer)?;
6051 match &self.counterparty_forwarding_info {
6054 info.fee_base_msat.write(writer)?;
6055 info.fee_proportional_millionths.write(writer)?;
6056 info.cltv_expiry_delta.write(writer)?;
6058 None => 0u8.write(writer)?
6061 self.channel_transaction_parameters.write(writer)?;
6062 self.funding_transaction.write(writer)?;
6064 self.counterparty_cur_commitment_point.write(writer)?;
6065 self.counterparty_prev_commitment_point.write(writer)?;
6066 self.counterparty_node_id.write(writer)?;
6068 self.counterparty_shutdown_scriptpubkey.write(writer)?;
6070 self.commitment_secrets.write(writer)?;
6072 self.channel_update_status.write(writer)?;
6074 #[cfg(any(test, fuzzing))]
6075 (self.historical_inbound_htlc_fulfills.len() as u64).write(writer)?;
6076 #[cfg(any(test, fuzzing))]
6077 for htlc in self.historical_inbound_htlc_fulfills.iter() {
6078 htlc.write(writer)?;
6081 // If the channel type is something other than only-static-remote-key, then we need to have
6082 // older clients fail to deserialize this channel at all. If the type is
6083 // only-static-remote-key, we simply consider it "default" and don't write the channel type
6085 let chan_type = if self.channel_type != ChannelTypeFeatures::only_static_remote_key() {
6086 Some(&self.channel_type) } else { None };
6088 // The same logic applies for `holder_selected_channel_reserve_satoshis` values other than
6089 // the default, and when `holder_max_htlc_value_in_flight_msat` is configured to be set to
6090 // a different percentage of the channel value then 10%, which older versions of LDK used
6091 // to set it to before the percentage was made configurable.
6092 let serialized_holder_selected_reserve =
6093 if self.holder_selected_channel_reserve_satoshis != Self::get_holder_selected_channel_reserve_satoshis(self.channel_value_satoshis)
6094 { Some(self.holder_selected_channel_reserve_satoshis) } else { None };
6096 let mut old_max_in_flight_percent_config = UserConfig::default().channel_handshake_config;
6097 old_max_in_flight_percent_config.max_inbound_htlc_value_in_flight_percent_of_channel = MAX_IN_FLIGHT_PERCENT_LEGACY;
6098 let serialized_holder_htlc_max_in_flight =
6099 if self.holder_max_htlc_value_in_flight_msat != Self::get_holder_max_htlc_value_in_flight_msat(self.channel_value_satoshis, &old_max_in_flight_percent_config)
6100 { Some(self.holder_max_htlc_value_in_flight_msat) } else { None };
6102 write_tlv_fields!(writer, {
6103 (0, self.announcement_sigs, option),
6104 // minimum_depth and counterparty_selected_channel_reserve_satoshis used to have a
6105 // default value instead of being Option<>al. Thus, to maintain compatibility we write
6106 // them twice, once with their original default values above, and once as an option
6107 // here. On the read side, old versions will simply ignore the odd-type entries here,
6108 // and new versions map the default values to None and allow the TLV entries here to
6110 (1, self.minimum_depth, option),
6111 (2, chan_type, option),
6112 (3, self.counterparty_selected_channel_reserve_satoshis, option),
6113 (4, serialized_holder_selected_reserve, option),
6114 (5, self.config, required),
6115 (6, serialized_holder_htlc_max_in_flight, option),
6116 (7, self.shutdown_scriptpubkey, option),
6117 (9, self.target_closing_feerate_sats_per_kw, option),
6118 (11, self.monitor_pending_finalized_fulfills, vec_type),
6119 (13, self.channel_creation_height, required),
6120 (15, preimages, vec_type),
6121 (17, self.announcement_sigs_state, required),
6122 (19, self.latest_inbound_scid_alias, option),
6123 (21, self.outbound_scid_alias, required),
6130 const MAX_ALLOC_SIZE: usize = 64*1024;
6131 impl<'a, Signer: Sign, K: Deref> ReadableArgs<(&'a K, u32)> for Channel<Signer>
6132 where K::Target: KeysInterface<Signer = Signer> {
6133 fn read<R : io::Read>(reader: &mut R, args: (&'a K, u32)) -> Result<Self, DecodeError> {
6134 let (keys_source, serialized_height) = args;
6135 let ver = read_ver_prefix!(reader, SERIALIZATION_VERSION);
6137 let user_id = Readable::read(reader)?;
6139 let mut config = Some(LegacyChannelConfig::default());
6141 // Read the old serialization of the ChannelConfig from version 0.0.98.
6142 config.as_mut().unwrap().options.forwarding_fee_proportional_millionths = Readable::read(reader)?;
6143 config.as_mut().unwrap().options.cltv_expiry_delta = Readable::read(reader)?;
6144 config.as_mut().unwrap().announced_channel = Readable::read(reader)?;
6145 config.as_mut().unwrap().commit_upfront_shutdown_pubkey = Readable::read(reader)?;
6147 // Read the 8 bytes of backwards-compatibility ChannelConfig data.
6148 let mut _val: u64 = Readable::read(reader)?;
6151 let channel_id = Readable::read(reader)?;
6152 let channel_state = Readable::read(reader)?;
6153 let channel_value_satoshis = Readable::read(reader)?;
6155 let latest_monitor_update_id = Readable::read(reader)?;
6157 let keys_len: u32 = Readable::read(reader)?;
6158 let mut keys_data = Vec::with_capacity(cmp::min(keys_len as usize, MAX_ALLOC_SIZE));
6159 while keys_data.len() != keys_len as usize {
6160 // Read 1KB at a time to avoid accidentally allocating 4GB on corrupted channel keys
6161 let mut data = [0; 1024];
6162 let read_slice = &mut data[0..cmp::min(1024, keys_len as usize - keys_data.len())];
6163 reader.read_exact(read_slice)?;
6164 keys_data.extend_from_slice(read_slice);
6166 let holder_signer = keys_source.read_chan_signer(&keys_data)?;
6168 // Read the old serialization for shutdown_pubkey, preferring the TLV field later if set.
6169 let mut shutdown_scriptpubkey = match <PublicKey as Readable>::read(reader) {
6170 Ok(pubkey) => Some(ShutdownScript::new_p2wpkh_from_pubkey(pubkey)),
6173 let destination_script = Readable::read(reader)?;
6175 let cur_holder_commitment_transaction_number = Readable::read(reader)?;
6176 let cur_counterparty_commitment_transaction_number = Readable::read(reader)?;
6177 let value_to_self_msat = Readable::read(reader)?;
6179 let pending_inbound_htlc_count: u64 = Readable::read(reader)?;
6180 let mut pending_inbound_htlcs = Vec::with_capacity(cmp::min(pending_inbound_htlc_count as usize, OUR_MAX_HTLCS as usize));
6181 for _ in 0..pending_inbound_htlc_count {
6182 pending_inbound_htlcs.push(InboundHTLCOutput {
6183 htlc_id: Readable::read(reader)?,
6184 amount_msat: Readable::read(reader)?,
6185 cltv_expiry: Readable::read(reader)?,
6186 payment_hash: Readable::read(reader)?,
6187 state: match <u8 as Readable>::read(reader)? {
6188 1 => InboundHTLCState::AwaitingRemoteRevokeToAnnounce(Readable::read(reader)?),
6189 2 => InboundHTLCState::AwaitingAnnouncedRemoteRevoke(Readable::read(reader)?),
6190 3 => InboundHTLCState::Committed,
6191 4 => InboundHTLCState::LocalRemoved(Readable::read(reader)?),
6192 _ => return Err(DecodeError::InvalidValue),
6197 let pending_outbound_htlc_count: u64 = Readable::read(reader)?;
6198 let mut pending_outbound_htlcs = Vec::with_capacity(cmp::min(pending_outbound_htlc_count as usize, OUR_MAX_HTLCS as usize));
6199 for _ in 0..pending_outbound_htlc_count {
6200 pending_outbound_htlcs.push(OutboundHTLCOutput {
6201 htlc_id: Readable::read(reader)?,
6202 amount_msat: Readable::read(reader)?,
6203 cltv_expiry: Readable::read(reader)?,
6204 payment_hash: Readable::read(reader)?,
6205 source: Readable::read(reader)?,
6206 state: match <u8 as Readable>::read(reader)? {
6207 0 => OutboundHTLCState::LocalAnnounced(Box::new(Readable::read(reader)?)),
6208 1 => OutboundHTLCState::Committed,
6210 let option: Option<HTLCFailReason> = Readable::read(reader)?;
6211 OutboundHTLCState::RemoteRemoved(option.into())
6214 let option: Option<HTLCFailReason> = Readable::read(reader)?;
6215 OutboundHTLCState::AwaitingRemoteRevokeToRemove(option.into())
6218 let option: Option<HTLCFailReason> = Readable::read(reader)?;
6219 OutboundHTLCState::AwaitingRemovedRemoteRevoke(option.into())
6221 _ => return Err(DecodeError::InvalidValue),
6226 let holding_cell_htlc_update_count: u64 = Readable::read(reader)?;
6227 let mut holding_cell_htlc_updates = Vec::with_capacity(cmp::min(holding_cell_htlc_update_count as usize, OUR_MAX_HTLCS as usize*2));
6228 for _ in 0..holding_cell_htlc_update_count {
6229 holding_cell_htlc_updates.push(match <u8 as Readable>::read(reader)? {
6230 0 => HTLCUpdateAwaitingACK::AddHTLC {
6231 amount_msat: Readable::read(reader)?,
6232 cltv_expiry: Readable::read(reader)?,
6233 payment_hash: Readable::read(reader)?,
6234 source: Readable::read(reader)?,
6235 onion_routing_packet: Readable::read(reader)?,
6237 1 => HTLCUpdateAwaitingACK::ClaimHTLC {
6238 payment_preimage: Readable::read(reader)?,
6239 htlc_id: Readable::read(reader)?,
6241 2 => HTLCUpdateAwaitingACK::FailHTLC {
6242 htlc_id: Readable::read(reader)?,
6243 err_packet: Readable::read(reader)?,
6245 _ => return Err(DecodeError::InvalidValue),
6249 let resend_order = match <u8 as Readable>::read(reader)? {
6250 0 => RAACommitmentOrder::CommitmentFirst,
6251 1 => RAACommitmentOrder::RevokeAndACKFirst,
6252 _ => return Err(DecodeError::InvalidValue),
6255 let monitor_pending_channel_ready = Readable::read(reader)?;
6256 let monitor_pending_revoke_and_ack = Readable::read(reader)?;
6257 let monitor_pending_commitment_signed = Readable::read(reader)?;
6259 let monitor_pending_forwards_count: u64 = Readable::read(reader)?;
6260 let mut monitor_pending_forwards = Vec::with_capacity(cmp::min(monitor_pending_forwards_count as usize, OUR_MAX_HTLCS as usize));
6261 for _ in 0..monitor_pending_forwards_count {
6262 monitor_pending_forwards.push((Readable::read(reader)?, Readable::read(reader)?));
6265 let monitor_pending_failures_count: u64 = Readable::read(reader)?;
6266 let mut monitor_pending_failures = Vec::with_capacity(cmp::min(monitor_pending_failures_count as usize, OUR_MAX_HTLCS as usize));
6267 for _ in 0..monitor_pending_failures_count {
6268 monitor_pending_failures.push((Readable::read(reader)?, Readable::read(reader)?, Readable::read(reader)?));
6271 let pending_update_fee_value: Option<u32> = Readable::read(reader)?;
6273 let holding_cell_update_fee = Readable::read(reader)?;
6275 let next_holder_htlc_id = Readable::read(reader)?;
6276 let next_counterparty_htlc_id = Readable::read(reader)?;
6277 let update_time_counter = Readable::read(reader)?;
6278 let feerate_per_kw = Readable::read(reader)?;
6280 // Versions prior to 0.0.100 expected to read the fields of `last_sent_closing_fee` here,
6281 // however we are supposed to restart shutdown fee negotiation on reconnect (and wipe
6282 // `last_send_closing_fee` in `remove_uncommitted_htlcs_and_mark_paused`) so we should never
6283 // consider the stale state on reload.
6284 match <u8 as Readable>::read(reader)? {
6287 let _: u32 = Readable::read(reader)?;
6288 let _: u64 = Readable::read(reader)?;
6289 let _: Signature = Readable::read(reader)?;
6291 _ => return Err(DecodeError::InvalidValue),
6294 let funding_tx_confirmed_in = Readable::read(reader)?;
6295 let funding_tx_confirmation_height = Readable::read(reader)?;
6296 let short_channel_id = Readable::read(reader)?;
6298 let counterparty_dust_limit_satoshis = Readable::read(reader)?;
6299 let holder_dust_limit_satoshis = Readable::read(reader)?;
6300 let counterparty_max_htlc_value_in_flight_msat = Readable::read(reader)?;
6301 let mut counterparty_selected_channel_reserve_satoshis = None;
6303 // Read the old serialization from version 0.0.98.
6304 counterparty_selected_channel_reserve_satoshis = Some(Readable::read(reader)?);
6306 // Read the 8 bytes of backwards-compatibility data.
6307 let _dummy: u64 = Readable::read(reader)?;
6309 let counterparty_htlc_minimum_msat = Readable::read(reader)?;
6310 let holder_htlc_minimum_msat = Readable::read(reader)?;
6311 let counterparty_max_accepted_htlcs = Readable::read(reader)?;
6313 let mut minimum_depth = None;
6315 // Read the old serialization from version 0.0.98.
6316 minimum_depth = Some(Readable::read(reader)?);
6318 // Read the 4 bytes of backwards-compatibility data.
6319 let _dummy: u32 = Readable::read(reader)?;
6322 let counterparty_forwarding_info = match <u8 as Readable>::read(reader)? {
6324 1 => Some(CounterpartyForwardingInfo {
6325 fee_base_msat: Readable::read(reader)?,
6326 fee_proportional_millionths: Readable::read(reader)?,
6327 cltv_expiry_delta: Readable::read(reader)?,
6329 _ => return Err(DecodeError::InvalidValue),
6332 let channel_parameters: ChannelTransactionParameters = Readable::read(reader)?;
6333 let funding_transaction = Readable::read(reader)?;
6335 let counterparty_cur_commitment_point = Readable::read(reader)?;
6337 let counterparty_prev_commitment_point = Readable::read(reader)?;
6338 let counterparty_node_id = Readable::read(reader)?;
6340 let counterparty_shutdown_scriptpubkey = Readable::read(reader)?;
6341 let commitment_secrets = Readable::read(reader)?;
6343 let channel_update_status = Readable::read(reader)?;
6345 #[cfg(any(test, fuzzing))]
6346 let mut historical_inbound_htlc_fulfills = HashSet::new();
6347 #[cfg(any(test, fuzzing))]
6349 let htlc_fulfills_len: u64 = Readable::read(reader)?;
6350 for _ in 0..htlc_fulfills_len {
6351 assert!(historical_inbound_htlc_fulfills.insert(Readable::read(reader)?));
6355 let pending_update_fee = if let Some(feerate) = pending_update_fee_value {
6356 Some((feerate, if channel_parameters.is_outbound_from_holder {
6357 FeeUpdateState::Outbound
6359 FeeUpdateState::AwaitingRemoteRevokeToAnnounce
6365 let mut announcement_sigs = None;
6366 let mut target_closing_feerate_sats_per_kw = None;
6367 let mut monitor_pending_finalized_fulfills = Some(Vec::new());
6368 let mut holder_selected_channel_reserve_satoshis = Some(Self::get_holder_selected_channel_reserve_satoshis(channel_value_satoshis));
6369 let mut holder_max_htlc_value_in_flight_msat = Some(Self::get_holder_max_htlc_value_in_flight_msat(channel_value_satoshis, &UserConfig::default().channel_handshake_config));
6370 // Prior to supporting channel type negotiation, all of our channels were static_remotekey
6371 // only, so we default to that if none was written.
6372 let mut channel_type = Some(ChannelTypeFeatures::only_static_remote_key());
6373 let mut channel_creation_height = Some(serialized_height);
6374 let mut preimages_opt: Option<Vec<Option<PaymentPreimage>>> = None;
6376 // If we read an old Channel, for simplicity we just treat it as "we never sent an
6377 // AnnouncementSignatures" which implies we'll re-send it on reconnect, but that's fine.
6378 let mut announcement_sigs_state = Some(AnnouncementSigsState::NotSent);
6379 let mut latest_inbound_scid_alias = None;
6380 let mut outbound_scid_alias = None;
6382 read_tlv_fields!(reader, {
6383 (0, announcement_sigs, option),
6384 (1, minimum_depth, option),
6385 (2, channel_type, option),
6386 (3, counterparty_selected_channel_reserve_satoshis, option),
6387 (4, holder_selected_channel_reserve_satoshis, option),
6388 (5, config, option), // Note that if none is provided we will *not* overwrite the existing one.
6389 (6, holder_max_htlc_value_in_flight_msat, option),
6390 (7, shutdown_scriptpubkey, option),
6391 (9, target_closing_feerate_sats_per_kw, option),
6392 (11, monitor_pending_finalized_fulfills, vec_type),
6393 (13, channel_creation_height, option),
6394 (15, preimages_opt, vec_type),
6395 (17, announcement_sigs_state, option),
6396 (19, latest_inbound_scid_alias, option),
6397 (21, outbound_scid_alias, option),
6400 if let Some(preimages) = preimages_opt {
6401 let mut iter = preimages.into_iter();
6402 for htlc in pending_outbound_htlcs.iter_mut() {
6404 OutboundHTLCState::AwaitingRemoteRevokeToRemove(OutboundHTLCOutcome::Success(None)) => {
6405 htlc.state = OutboundHTLCState::AwaitingRemoteRevokeToRemove(OutboundHTLCOutcome::Success(iter.next().ok_or(DecodeError::InvalidValue)?));
6407 OutboundHTLCState::AwaitingRemovedRemoteRevoke(OutboundHTLCOutcome::Success(None)) => {
6408 htlc.state = OutboundHTLCState::AwaitingRemovedRemoteRevoke(OutboundHTLCOutcome::Success(iter.next().ok_or(DecodeError::InvalidValue)?));
6413 // We expect all preimages to be consumed above
6414 if iter.next().is_some() {
6415 return Err(DecodeError::InvalidValue);
6419 let chan_features = channel_type.as_ref().unwrap();
6420 if chan_features.supports_unknown_bits() || chan_features.requires_unknown_bits() {
6421 // If the channel was written by a new version and negotiated with features we don't
6422 // understand yet, refuse to read it.
6423 return Err(DecodeError::UnknownRequiredFeature);
6426 if channel_parameters.opt_anchors.is_some() {
6427 // Relax this check when ChannelTypeFeatures supports anchors.
6428 return Err(DecodeError::InvalidValue);
6431 let mut secp_ctx = Secp256k1::new();
6432 secp_ctx.seeded_randomize(&keys_source.get_secure_random_bytes());
6437 config: config.unwrap(),
6441 // Note that we don't care about serializing handshake limits as we only ever serialize
6442 // channel data after the handshake has completed.
6443 inbound_handshake_limits_override: None,
6447 announcement_sigs_state: announcement_sigs_state.unwrap(),
6449 channel_value_satoshis,
6451 latest_monitor_update_id,
6454 shutdown_scriptpubkey,
6457 cur_holder_commitment_transaction_number,
6458 cur_counterparty_commitment_transaction_number,
6461 pending_inbound_htlcs,
6462 pending_outbound_htlcs,
6463 holding_cell_htlc_updates,
6467 monitor_pending_channel_ready,
6468 monitor_pending_revoke_and_ack,
6469 monitor_pending_commitment_signed,
6470 monitor_pending_forwards,
6471 monitor_pending_failures,
6472 monitor_pending_finalized_fulfills: monitor_pending_finalized_fulfills.unwrap(),
6475 holding_cell_update_fee,
6476 next_holder_htlc_id,
6477 next_counterparty_htlc_id,
6478 update_time_counter,
6481 #[cfg(debug_assertions)]
6482 holder_max_commitment_tx_output: Mutex::new((0, 0)),
6483 #[cfg(debug_assertions)]
6484 counterparty_max_commitment_tx_output: Mutex::new((0, 0)),
6486 last_sent_closing_fee: None,
6487 pending_counterparty_closing_signed: None,
6488 closing_fee_limits: None,
6489 target_closing_feerate_sats_per_kw,
6491 inbound_awaiting_accept: false,
6493 funding_tx_confirmed_in,
6494 funding_tx_confirmation_height,
6496 channel_creation_height: channel_creation_height.unwrap(),
6498 counterparty_dust_limit_satoshis,
6499 holder_dust_limit_satoshis,
6500 counterparty_max_htlc_value_in_flight_msat,
6501 holder_max_htlc_value_in_flight_msat: holder_max_htlc_value_in_flight_msat.unwrap(),
6502 counterparty_selected_channel_reserve_satoshis,
6503 holder_selected_channel_reserve_satoshis: holder_selected_channel_reserve_satoshis.unwrap(),
6504 counterparty_htlc_minimum_msat,
6505 holder_htlc_minimum_msat,
6506 counterparty_max_accepted_htlcs,
6509 counterparty_forwarding_info,
6511 channel_transaction_parameters: channel_parameters,
6512 funding_transaction,
6514 counterparty_cur_commitment_point,
6515 counterparty_prev_commitment_point,
6516 counterparty_node_id,
6518 counterparty_shutdown_scriptpubkey,
6522 channel_update_status,
6523 closing_signed_in_flight: false,
6527 #[cfg(any(test, fuzzing))]
6528 next_local_commitment_tx_fee_info_cached: Mutex::new(None),
6529 #[cfg(any(test, fuzzing))]
6530 next_remote_commitment_tx_fee_info_cached: Mutex::new(None),
6532 workaround_lnd_bug_4006: None,
6534 latest_inbound_scid_alias,
6535 // Later in the ChannelManager deserialization phase we scan for channels and assign scid aliases if its missing
6536 outbound_scid_alias: outbound_scid_alias.unwrap_or(0),
6538 #[cfg(any(test, fuzzing))]
6539 historical_inbound_htlc_fulfills,
6541 channel_type: channel_type.unwrap(),
6548 use bitcoin::blockdata::script::{Script, Builder};
6549 use bitcoin::blockdata::transaction::{Transaction, TxOut};
6550 use bitcoin::blockdata::constants::genesis_block;
6551 use bitcoin::blockdata::opcodes;
6552 use bitcoin::network::constants::Network;
6554 use ln::PaymentHash;
6555 use ln::channelmanager::{HTLCSource, PaymentId};
6556 use ln::channel::{Channel, InboundHTLCOutput, OutboundHTLCOutput, InboundHTLCState, OutboundHTLCState, HTLCCandidate, HTLCInitiator};
6557 use ln::channel::{MAX_FUNDING_SATOSHIS_NO_WUMBO, TOTAL_BITCOIN_SUPPLY_SATOSHIS};
6558 use ln::features::{InitFeatures, ChannelTypeFeatures};
6559 use ln::msgs::{ChannelUpdate, DataLossProtect, DecodeError, OptionalField, UnsignedChannelUpdate};
6560 use ln::script::ShutdownScript;
6562 use ln::chan_utils::{htlc_success_tx_weight, htlc_timeout_tx_weight};
6563 use chain::BestBlock;
6564 use chain::chaininterface::{FeeEstimator,ConfirmationTarget};
6565 use chain::keysinterface::{InMemorySigner, Recipient, KeyMaterial, KeysInterface};
6566 use chain::transaction::OutPoint;
6567 use util::config::UserConfig;
6568 use util::enforcing_trait_impls::EnforcingSigner;
6569 use util::errors::APIError;
6570 use util::test_utils;
6571 use util::test_utils::OnGetShutdownScriptpubkey;
6572 use bitcoin::secp256k1::{Secp256k1, ecdsa::Signature};
6573 use bitcoin::secp256k1::ffi::Signature as FFISignature;
6574 use bitcoin::secp256k1::{SecretKey,PublicKey};
6575 use bitcoin::secp256k1::ecdsa::RecoverableSignature;
6576 use bitcoin::hashes::sha256::Hash as Sha256;
6577 use bitcoin::hashes::Hash;
6578 use bitcoin::hash_types::WPubkeyHash;
6579 use bitcoin::bech32::u5;
6580 use bitcoin::util::address::WitnessVersion;
6583 struct TestFeeEstimator {
6586 impl FeeEstimator for TestFeeEstimator {
6587 fn get_est_sat_per_1000_weight(&self, _: ConfirmationTarget) -> u32 {
6593 fn test_max_funding_satoshis_no_wumbo() {
6594 assert_eq!(TOTAL_BITCOIN_SUPPLY_SATOSHIS, 21_000_000 * 100_000_000);
6595 assert!(MAX_FUNDING_SATOSHIS_NO_WUMBO <= TOTAL_BITCOIN_SUPPLY_SATOSHIS,
6596 "MAX_FUNDING_SATOSHIS_NO_WUMBO is greater than all satoshis in existence");
6600 fn test_no_fee_check_overflow() {
6601 // Previously, calling `check_remote_fee` with a fee of 0xffffffff would overflow in
6602 // arithmetic, causing a panic with debug assertions enabled.
6603 assert!(Channel::<InMemorySigner>::check_remote_fee(&&TestFeeEstimator { fee_est: 42 }, u32::max_value()).is_err());
6607 signer: InMemorySigner,
6609 impl KeysInterface for Keys {
6610 type Signer = InMemorySigner;
6612 fn get_node_secret(&self, _recipient: Recipient) -> Result<SecretKey, ()> { panic!(); }
6613 fn get_inbound_payment_key_material(&self) -> KeyMaterial { panic!(); }
6614 fn get_destination_script(&self) -> Script {
6615 let secp_ctx = Secp256k1::signing_only();
6616 let channel_monitor_claim_key = SecretKey::from_slice(&hex::decode("0fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff").unwrap()[..]).unwrap();
6617 let channel_monitor_claim_key_hash = WPubkeyHash::hash(&PublicKey::from_secret_key(&secp_ctx, &channel_monitor_claim_key).serialize());
6618 Builder::new().push_opcode(opcodes::all::OP_PUSHBYTES_0).push_slice(&channel_monitor_claim_key_hash[..]).into_script()
6621 fn get_shutdown_scriptpubkey(&self) -> ShutdownScript {
6622 let secp_ctx = Secp256k1::signing_only();
6623 let channel_close_key = SecretKey::from_slice(&hex::decode("0fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff").unwrap()[..]).unwrap();
6624 ShutdownScript::new_p2wpkh_from_pubkey(PublicKey::from_secret_key(&secp_ctx, &channel_close_key))
6627 fn get_channel_signer(&self, _inbound: bool, _channel_value_satoshis: u64) -> InMemorySigner {
6630 fn get_secure_random_bytes(&self) -> [u8; 32] { [0; 32] }
6631 fn read_chan_signer(&self, _data: &[u8]) -> Result<Self::Signer, DecodeError> { panic!(); }
6632 fn sign_invoice(&self, _hrp_bytes: &[u8], _invoice_data: &[u5], _recipient: Recipient) -> Result<RecoverableSignature, ()> { panic!(); }
6635 #[cfg(not(feature = "grind_signatures"))]
6636 fn public_from_secret_hex(secp_ctx: &Secp256k1<bitcoin::secp256k1::All>, hex: &str) -> PublicKey {
6637 PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&hex::decode(hex).unwrap()[..]).unwrap())
6641 fn upfront_shutdown_script_incompatibility() {
6642 let features = InitFeatures::known().clear_shutdown_anysegwit();
6643 let non_v0_segwit_shutdown_script =
6644 ShutdownScript::new_witness_program(WitnessVersion::V16, &[0, 40]).unwrap();
6646 let seed = [42; 32];
6647 let network = Network::Testnet;
6648 let keys_provider = test_utils::TestKeysInterface::new(&seed, network);
6649 keys_provider.expect(OnGetShutdownScriptpubkey {
6650 returns: non_v0_segwit_shutdown_script.clone(),
6653 let fee_estimator = TestFeeEstimator { fee_est: 253 };
6654 let secp_ctx = Secp256k1::new();
6655 let node_id = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[42; 32]).unwrap());
6656 let config = UserConfig::default();
6657 match Channel::<EnforcingSigner>::new_outbound(&&fee_estimator, &&keys_provider, node_id, &features, 10000000, 100000, 42, &config, 0, 42) {
6658 Err(APIError::IncompatibleShutdownScript { script }) => {
6659 assert_eq!(script.into_inner(), non_v0_segwit_shutdown_script.into_inner());
6661 Err(e) => panic!("Unexpected error: {:?}", e),
6662 Ok(_) => panic!("Expected error"),
6666 // Check that, during channel creation, we use the same feerate in the open channel message
6667 // as we do in the Channel object creation itself.
6669 fn test_open_channel_msg_fee() {
6670 let original_fee = 253;
6671 let mut fee_est = TestFeeEstimator{fee_est: original_fee };
6672 let secp_ctx = Secp256k1::new();
6673 let seed = [42; 32];
6674 let network = Network::Testnet;
6675 let keys_provider = test_utils::TestKeysInterface::new(&seed, network);
6677 let node_a_node_id = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[42; 32]).unwrap());
6678 let config = UserConfig::default();
6679 let node_a_chan = Channel::<EnforcingSigner>::new_outbound(&&fee_est, &&keys_provider, node_a_node_id, &InitFeatures::known(), 10000000, 100000, 42, &config, 0, 42).unwrap();
6681 // Now change the fee so we can check that the fee in the open_channel message is the
6682 // same as the old fee.
6683 fee_est.fee_est = 500;
6684 let open_channel_msg = node_a_chan.get_open_channel(genesis_block(network).header.block_hash());
6685 assert_eq!(open_channel_msg.feerate_per_kw, original_fee);
6689 fn test_holder_vs_counterparty_dust_limit() {
6690 // Test that when calculating the local and remote commitment transaction fees, the correct
6691 // dust limits are used.
6692 let feeest = TestFeeEstimator{fee_est: 15000};
6693 let secp_ctx = Secp256k1::new();
6694 let seed = [42; 32];
6695 let network = Network::Testnet;
6696 let keys_provider = test_utils::TestKeysInterface::new(&seed, network);
6697 let logger = test_utils::TestLogger::new();
6699 // Go through the flow of opening a channel between two nodes, making sure
6700 // they have different dust limits.
6702 // Create Node A's channel pointing to Node B's pubkey
6703 let node_b_node_id = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[42; 32]).unwrap());
6704 let config = UserConfig::default();
6705 let mut node_a_chan = Channel::<EnforcingSigner>::new_outbound(&&feeest, &&keys_provider, node_b_node_id, &InitFeatures::known(), 10000000, 100000, 42, &config, 0, 42).unwrap();
6707 // Create Node B's channel by receiving Node A's open_channel message
6708 // Make sure A's dust limit is as we expect.
6709 let open_channel_msg = node_a_chan.get_open_channel(genesis_block(network).header.block_hash());
6710 let node_b_node_id = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[7; 32]).unwrap());
6711 let mut node_b_chan = Channel::<EnforcingSigner>::new_from_req(&&feeest, &&keys_provider, node_b_node_id, &InitFeatures::known(), &open_channel_msg, 7, &config, 0, &&logger, 42).unwrap();
6713 // Node B --> Node A: accept channel, explicitly setting B's dust limit.
6714 let mut accept_channel_msg = node_b_chan.accept_inbound_channel(0);
6715 accept_channel_msg.dust_limit_satoshis = 546;
6716 node_a_chan.accept_channel(&accept_channel_msg, &config.channel_handshake_limits, &InitFeatures::known()).unwrap();
6717 node_a_chan.holder_dust_limit_satoshis = 1560;
6719 // Put some inbound and outbound HTLCs in A's channel.
6720 let htlc_amount_msat = 11_092_000; // put an amount below A's effective dust limit but above B's.
6721 node_a_chan.pending_inbound_htlcs.push(InboundHTLCOutput {
6723 amount_msat: htlc_amount_msat,
6724 payment_hash: PaymentHash(Sha256::hash(&[42; 32]).into_inner()),
6725 cltv_expiry: 300000000,
6726 state: InboundHTLCState::Committed,
6729 node_a_chan.pending_outbound_htlcs.push(OutboundHTLCOutput {
6731 amount_msat: htlc_amount_msat, // put an amount below A's dust amount but above B's.
6732 payment_hash: PaymentHash(Sha256::hash(&[43; 32]).into_inner()),
6733 cltv_expiry: 200000000,
6734 state: OutboundHTLCState::Committed,
6735 source: HTLCSource::OutboundRoute {
6737 session_priv: SecretKey::from_slice(&hex::decode("0fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff").unwrap()[..]).unwrap(),
6738 first_hop_htlc_msat: 548,
6739 payment_id: PaymentId([42; 32]),
6740 payment_secret: None,
6741 payment_params: None,
6745 // Make sure when Node A calculates their local commitment transaction, none of the HTLCs pass
6746 // the dust limit check.
6747 let htlc_candidate = HTLCCandidate::new(htlc_amount_msat, HTLCInitiator::LocalOffered);
6748 let local_commit_tx_fee = node_a_chan.next_local_commit_tx_fee_msat(htlc_candidate, None);
6749 let local_commit_fee_0_htlcs = Channel::<EnforcingSigner>::commit_tx_fee_msat(node_a_chan.feerate_per_kw, 0, node_a_chan.opt_anchors());
6750 assert_eq!(local_commit_tx_fee, local_commit_fee_0_htlcs);
6752 // Finally, make sure that when Node A calculates the remote's commitment transaction fees, all
6753 // of the HTLCs are seen to be above the dust limit.
6754 node_a_chan.channel_transaction_parameters.is_outbound_from_holder = false;
6755 let remote_commit_fee_3_htlcs = Channel::<EnforcingSigner>::commit_tx_fee_msat(node_a_chan.feerate_per_kw, 3, node_a_chan.opt_anchors());
6756 let htlc_candidate = HTLCCandidate::new(htlc_amount_msat, HTLCInitiator::LocalOffered);
6757 let remote_commit_tx_fee = node_a_chan.next_remote_commit_tx_fee_msat(htlc_candidate, None);
6758 assert_eq!(remote_commit_tx_fee, remote_commit_fee_3_htlcs);
6762 fn test_timeout_vs_success_htlc_dust_limit() {
6763 // Make sure that when `next_remote_commit_tx_fee_msat` and `next_local_commit_tx_fee_msat`
6764 // calculate the real dust limits for HTLCs (i.e. the dust limit given by the counterparty
6765 // *plus* the fees paid for the HTLC) they don't swap `HTLC_SUCCESS_TX_WEIGHT` for
6766 // `HTLC_TIMEOUT_TX_WEIGHT`, and vice versa.
6767 let fee_est = TestFeeEstimator{fee_est: 253 };
6768 let secp_ctx = Secp256k1::new();
6769 let seed = [42; 32];
6770 let network = Network::Testnet;
6771 let keys_provider = test_utils::TestKeysInterface::new(&seed, network);
6773 let node_id = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[42; 32]).unwrap());
6774 let config = UserConfig::default();
6775 let mut chan = Channel::<EnforcingSigner>::new_outbound(&&fee_est, &&keys_provider, node_id, &InitFeatures::known(), 10000000, 100000, 42, &config, 0, 42).unwrap();
6777 let commitment_tx_fee_0_htlcs = Channel::<EnforcingSigner>::commit_tx_fee_msat(chan.feerate_per_kw, 0, chan.opt_anchors());
6778 let commitment_tx_fee_1_htlc = Channel::<EnforcingSigner>::commit_tx_fee_msat(chan.feerate_per_kw, 1, chan.opt_anchors());
6780 // If HTLC_SUCCESS_TX_WEIGHT and HTLC_TIMEOUT_TX_WEIGHT were swapped: then this HTLC would be
6781 // counted as dust when it shouldn't be.
6782 let htlc_amt_above_timeout = ((253 * htlc_timeout_tx_weight(chan.opt_anchors()) / 1000) + chan.holder_dust_limit_satoshis + 1) * 1000;
6783 let htlc_candidate = HTLCCandidate::new(htlc_amt_above_timeout, HTLCInitiator::LocalOffered);
6784 let commitment_tx_fee = chan.next_local_commit_tx_fee_msat(htlc_candidate, None);
6785 assert_eq!(commitment_tx_fee, commitment_tx_fee_1_htlc);
6787 // If swapped: this HTLC would be counted as non-dust when it shouldn't be.
6788 let dust_htlc_amt_below_success = ((253 * htlc_success_tx_weight(chan.opt_anchors()) / 1000) + chan.holder_dust_limit_satoshis - 1) * 1000;
6789 let htlc_candidate = HTLCCandidate::new(dust_htlc_amt_below_success, HTLCInitiator::RemoteOffered);
6790 let commitment_tx_fee = chan.next_local_commit_tx_fee_msat(htlc_candidate, None);
6791 assert_eq!(commitment_tx_fee, commitment_tx_fee_0_htlcs);
6793 chan.channel_transaction_parameters.is_outbound_from_holder = false;
6795 // If swapped: this HTLC would be counted as non-dust when it shouldn't be.
6796 let dust_htlc_amt_above_timeout = ((253 * htlc_timeout_tx_weight(chan.opt_anchors()) / 1000) + chan.counterparty_dust_limit_satoshis + 1) * 1000;
6797 let htlc_candidate = HTLCCandidate::new(dust_htlc_amt_above_timeout, HTLCInitiator::LocalOffered);
6798 let commitment_tx_fee = chan.next_remote_commit_tx_fee_msat(htlc_candidate, None);
6799 assert_eq!(commitment_tx_fee, commitment_tx_fee_0_htlcs);
6801 // If swapped: this HTLC would be counted as dust when it shouldn't be.
6802 let htlc_amt_below_success = ((253 * htlc_success_tx_weight(chan.opt_anchors()) / 1000) + chan.counterparty_dust_limit_satoshis - 1) * 1000;
6803 let htlc_candidate = HTLCCandidate::new(htlc_amt_below_success, HTLCInitiator::RemoteOffered);
6804 let commitment_tx_fee = chan.next_remote_commit_tx_fee_msat(htlc_candidate, None);
6805 assert_eq!(commitment_tx_fee, commitment_tx_fee_1_htlc);
6809 fn channel_reestablish_no_updates() {
6810 let feeest = TestFeeEstimator{fee_est: 15000};
6811 let logger = test_utils::TestLogger::new();
6812 let secp_ctx = Secp256k1::new();
6813 let seed = [42; 32];
6814 let network = Network::Testnet;
6815 let best_block = BestBlock::from_genesis(network);
6816 let chain_hash = best_block.block_hash();
6817 let keys_provider = test_utils::TestKeysInterface::new(&seed, network);
6819 // Go through the flow of opening a channel between two nodes.
6821 // Create Node A's channel pointing to Node B's pubkey
6822 let node_b_node_id = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[42; 32]).unwrap());
6823 let config = UserConfig::default();
6824 let mut node_a_chan = Channel::<EnforcingSigner>::new_outbound(&&feeest, &&keys_provider, node_b_node_id, &InitFeatures::known(), 10000000, 100000, 42, &config, 0, 42).unwrap();
6826 // Create Node B's channel by receiving Node A's open_channel message
6827 let open_channel_msg = node_a_chan.get_open_channel(chain_hash);
6828 let node_b_node_id = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[7; 32]).unwrap());
6829 let mut node_b_chan = Channel::<EnforcingSigner>::new_from_req(&&feeest, &&keys_provider, node_b_node_id, &InitFeatures::known(), &open_channel_msg, 7, &config, 0, &&logger, 42).unwrap();
6831 // Node B --> Node A: accept channel
6832 let accept_channel_msg = node_b_chan.accept_inbound_channel(0);
6833 node_a_chan.accept_channel(&accept_channel_msg, &config.channel_handshake_limits, &InitFeatures::known()).unwrap();
6835 // Node A --> Node B: funding created
6836 let output_script = node_a_chan.get_funding_redeemscript();
6837 let tx = Transaction { version: 1, lock_time: 0, input: Vec::new(), output: vec![TxOut {
6838 value: 10000000, script_pubkey: output_script.clone(),
6840 let funding_outpoint = OutPoint{ txid: tx.txid(), index: 0 };
6841 let funding_created_msg = node_a_chan.get_outbound_funding_created(tx.clone(), funding_outpoint, &&logger).unwrap();
6842 let (funding_signed_msg, _, _) = node_b_chan.funding_created(&funding_created_msg, best_block, &&logger).unwrap();
6844 // Node B --> Node A: funding signed
6845 let _ = node_a_chan.funding_signed(&funding_signed_msg, best_block, &&logger);
6847 // Now disconnect the two nodes and check that the commitment point in
6848 // Node B's channel_reestablish message is sane.
6849 node_b_chan.remove_uncommitted_htlcs_and_mark_paused(&&logger);
6850 let msg = node_b_chan.get_channel_reestablish(&&logger);
6851 assert_eq!(msg.next_local_commitment_number, 1); // now called next_commitment_number
6852 assert_eq!(msg.next_remote_commitment_number, 0); // now called next_revocation_number
6853 match msg.data_loss_protect {
6854 OptionalField::Present(DataLossProtect { your_last_per_commitment_secret, .. }) => {
6855 assert_eq!(your_last_per_commitment_secret, [0; 32]);
6860 // Check that the commitment point in Node A's channel_reestablish message
6862 node_a_chan.remove_uncommitted_htlcs_and_mark_paused(&&logger);
6863 let msg = node_a_chan.get_channel_reestablish(&&logger);
6864 assert_eq!(msg.next_local_commitment_number, 1); // now called next_commitment_number
6865 assert_eq!(msg.next_remote_commitment_number, 0); // now called next_revocation_number
6866 match msg.data_loss_protect {
6867 OptionalField::Present(DataLossProtect { your_last_per_commitment_secret, .. }) => {
6868 assert_eq!(your_last_per_commitment_secret, [0; 32]);
6875 fn test_configured_holder_max_htlc_value_in_flight() {
6876 let feeest = TestFeeEstimator{fee_est: 15000};
6877 let logger = test_utils::TestLogger::new();
6878 let secp_ctx = Secp256k1::new();
6879 let seed = [42; 32];
6880 let network = Network::Testnet;
6881 let keys_provider = test_utils::TestKeysInterface::new(&seed, network);
6882 let outbound_node_id = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[42; 32]).unwrap());
6883 let inbound_node_id = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[7; 32]).unwrap());
6885 let mut config_2_percent = UserConfig::default();
6886 config_2_percent.channel_handshake_config.max_inbound_htlc_value_in_flight_percent_of_channel = 2;
6887 let mut config_99_percent = UserConfig::default();
6888 config_99_percent.channel_handshake_config.max_inbound_htlc_value_in_flight_percent_of_channel = 99;
6889 let mut config_0_percent = UserConfig::default();
6890 config_0_percent.channel_handshake_config.max_inbound_htlc_value_in_flight_percent_of_channel = 0;
6891 let mut config_101_percent = UserConfig::default();
6892 config_101_percent.channel_handshake_config.max_inbound_htlc_value_in_flight_percent_of_channel = 101;
6894 // Test that `new_outbound` creates a channel with the correct value for
6895 // `holder_max_htlc_value_in_flight_msat`, when configured with a valid percentage value,
6896 // which is set to the lower bound + 1 (2%) of the `channel_value`.
6897 let chan_1 = Channel::<EnforcingSigner>::new_outbound(&&feeest, &&keys_provider, outbound_node_id, &InitFeatures::known(), 10000000, 100000, 42, &config_2_percent, 0, 42).unwrap();
6898 let chan_1_value_msat = chan_1.channel_value_satoshis * 1000;
6899 assert_eq!(chan_1.holder_max_htlc_value_in_flight_msat, (chan_1_value_msat as f64 * 0.02) as u64);
6901 // Test with the upper bound - 1 of valid values (99%).
6902 let chan_2 = Channel::<EnforcingSigner>::new_outbound(&&feeest, &&keys_provider, outbound_node_id, &InitFeatures::known(), 10000000, 100000, 42, &config_99_percent, 0, 42).unwrap();
6903 let chan_2_value_msat = chan_2.channel_value_satoshis * 1000;
6904 assert_eq!(chan_2.holder_max_htlc_value_in_flight_msat, (chan_2_value_msat as f64 * 0.99) as u64);
6906 let chan_1_open_channel_msg = chan_1.get_open_channel(genesis_block(network).header.block_hash());
6908 // Test that `new_from_req` creates a channel with the correct value for
6909 // `holder_max_htlc_value_in_flight_msat`, when configured with a valid percentage value,
6910 // which is set to the lower bound - 1 (2%) of the `channel_value`.
6911 let chan_3 = Channel::<EnforcingSigner>::new_from_req(&&feeest, &&keys_provider, inbound_node_id, &InitFeatures::known(), &chan_1_open_channel_msg, 7, &config_2_percent, 0, &&logger, 42).unwrap();
6912 let chan_3_value_msat = chan_3.channel_value_satoshis * 1000;
6913 assert_eq!(chan_3.holder_max_htlc_value_in_flight_msat, (chan_3_value_msat as f64 * 0.02) as u64);
6915 // Test with the upper bound - 1 of valid values (99%).
6916 let chan_4 = Channel::<EnforcingSigner>::new_from_req(&&feeest, &&keys_provider, inbound_node_id, &InitFeatures::known(), &chan_1_open_channel_msg, 7, &config_99_percent, 0, &&logger, 42).unwrap();
6917 let chan_4_value_msat = chan_4.channel_value_satoshis * 1000;
6918 assert_eq!(chan_4.holder_max_htlc_value_in_flight_msat, (chan_4_value_msat as f64 * 0.99) as u64);
6920 // Test that `new_outbound` uses the lower bound of the configurable percentage values (1%)
6921 // if `max_inbound_htlc_value_in_flight_percent_of_channel` is set to a value less than 1.
6922 let chan_5 = Channel::<EnforcingSigner>::new_outbound(&&feeest, &&keys_provider, outbound_node_id, &InitFeatures::known(), 10000000, 100000, 42, &config_0_percent, 0, 42).unwrap();
6923 let chan_5_value_msat = chan_5.channel_value_satoshis * 1000;
6924 assert_eq!(chan_5.holder_max_htlc_value_in_flight_msat, (chan_5_value_msat as f64 * 0.01) as u64);
6926 // Test that `new_outbound` uses the upper bound of the configurable percentage values
6927 // (100%) if `max_inbound_htlc_value_in_flight_percent_of_channel` is set to a larger value
6929 let chan_6 = Channel::<EnforcingSigner>::new_outbound(&&feeest, &&keys_provider, outbound_node_id, &InitFeatures::known(), 10000000, 100000, 42, &config_101_percent, 0, 42).unwrap();
6930 let chan_6_value_msat = chan_6.channel_value_satoshis * 1000;
6931 assert_eq!(chan_6.holder_max_htlc_value_in_flight_msat, chan_6_value_msat);
6933 // Test that `new_from_req` uses the lower bound of the configurable percentage values (1%)
6934 // if `max_inbound_htlc_value_in_flight_percent_of_channel` is set to a value less than 1.
6935 let chan_7 = Channel::<EnforcingSigner>::new_from_req(&&feeest, &&keys_provider, inbound_node_id, &InitFeatures::known(), &chan_1_open_channel_msg, 7, &config_0_percent, 0, &&logger, 42).unwrap();
6936 let chan_7_value_msat = chan_7.channel_value_satoshis * 1000;
6937 assert_eq!(chan_7.holder_max_htlc_value_in_flight_msat, (chan_7_value_msat as f64 * 0.01) as u64);
6939 // Test that `new_from_req` uses the upper bound of the configurable percentage values
6940 // (100%) if `max_inbound_htlc_value_in_flight_percent_of_channel` is set to a larger value
6942 let chan_8 = Channel::<EnforcingSigner>::new_from_req(&&feeest, &&keys_provider, inbound_node_id, &InitFeatures::known(), &chan_1_open_channel_msg, 7, &config_101_percent, 0, &&logger, 42).unwrap();
6943 let chan_8_value_msat = chan_8.channel_value_satoshis * 1000;
6944 assert_eq!(chan_8.holder_max_htlc_value_in_flight_msat, chan_8_value_msat);
6948 fn channel_update() {
6949 let feeest = TestFeeEstimator{fee_est: 15000};
6950 let secp_ctx = Secp256k1::new();
6951 let seed = [42; 32];
6952 let network = Network::Testnet;
6953 let chain_hash = genesis_block(network).header.block_hash();
6954 let keys_provider = test_utils::TestKeysInterface::new(&seed, network);
6956 // Create a channel.
6957 let node_b_node_id = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[42; 32]).unwrap());
6958 let config = UserConfig::default();
6959 let mut node_a_chan = Channel::<EnforcingSigner>::new_outbound(&&feeest, &&keys_provider, node_b_node_id, &InitFeatures::known(), 10000000, 100000, 42, &config, 0, 42).unwrap();
6960 assert!(node_a_chan.counterparty_forwarding_info.is_none());
6961 assert_eq!(node_a_chan.holder_htlc_minimum_msat, 1); // the default
6962 assert!(node_a_chan.counterparty_forwarding_info().is_none());
6964 // Make sure that receiving a channel update will update the Channel as expected.
6965 let update = ChannelUpdate {
6966 contents: UnsignedChannelUpdate {
6968 short_channel_id: 0,
6971 cltv_expiry_delta: 100,
6972 htlc_minimum_msat: 5,
6973 htlc_maximum_msat: OptionalField::Absent,
6975 fee_proportional_millionths: 11,
6976 excess_data: Vec::new(),
6978 signature: Signature::from(unsafe { FFISignature::new() })
6980 node_a_chan.channel_update(&update).unwrap();
6982 // The counterparty can send an update with a higher minimum HTLC, but that shouldn't
6983 // change our official htlc_minimum_msat.
6984 assert_eq!(node_a_chan.holder_htlc_minimum_msat, 1);
6985 match node_a_chan.counterparty_forwarding_info() {
6987 assert_eq!(info.cltv_expiry_delta, 100);
6988 assert_eq!(info.fee_base_msat, 110);
6989 assert_eq!(info.fee_proportional_millionths, 11);
6991 None => panic!("expected counterparty forwarding info to be Some")
6995 #[cfg(not(feature = "grind_signatures"))]
6997 fn outbound_commitment_test() {
6998 use bitcoin::util::sighash;
6999 use bitcoin::consensus::encode::serialize;
7000 use bitcoin::blockdata::transaction::EcdsaSighashType;
7001 use bitcoin::hashes::hex::FromHex;
7002 use bitcoin::hash_types::Txid;
7003 use bitcoin::secp256k1::Message;
7004 use chain::keysinterface::BaseSign;
7005 use ln::PaymentPreimage;
7006 use ln::channel::{HTLCOutputInCommitment ,TxCreationKeys};
7007 use ln::chan_utils::{ChannelPublicKeys, HolderCommitmentTransaction, CounterpartyChannelTransactionParameters};
7008 use util::logger::Logger;
7011 // Test vectors from BOLT 3 Appendices C and F (anchors):
7012 let feeest = TestFeeEstimator{fee_est: 15000};
7013 let logger : Arc<Logger> = Arc::new(test_utils::TestLogger::new());
7014 let secp_ctx = Secp256k1::new();
7016 let mut signer = InMemorySigner::new(
7018 SecretKey::from_slice(&hex::decode("4242424242424242424242424242424242424242424242424242424242424242").unwrap()[..]).unwrap(),
7019 SecretKey::from_slice(&hex::decode("30ff4956bbdd3222d44cc5e8a1261dab1e07957bdac5ae88fe3261ef321f3749").unwrap()[..]).unwrap(),
7020 SecretKey::from_slice(&hex::decode("0fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff").unwrap()[..]).unwrap(),
7021 SecretKey::from_slice(&hex::decode("1111111111111111111111111111111111111111111111111111111111111111").unwrap()[..]).unwrap(),
7022 SecretKey::from_slice(&hex::decode("3333333333333333333333333333333333333333333333333333333333333333").unwrap()[..]).unwrap(),
7023 SecretKey::from_slice(&hex::decode("1111111111111111111111111111111111111111111111111111111111111111").unwrap()[..]).unwrap(),
7025 // These aren't set in the test vectors:
7026 [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],
7031 assert_eq!(signer.pubkeys().funding_pubkey.serialize()[..],
7032 hex::decode("023da092f6980e58d2c037173180e9a465476026ee50f96695963e8efe436f54eb").unwrap()[..]);
7033 let keys_provider = Keys { signer: signer.clone() };
7035 let counterparty_node_id = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[42; 32]).unwrap());
7036 let mut config = UserConfig::default();
7037 config.channel_handshake_config.announced_channel = false;
7038 let mut chan = Channel::<InMemorySigner>::new_outbound(&&feeest, &&keys_provider, counterparty_node_id, &InitFeatures::known(), 10_000_000, 100000, 42, &config, 0, 42).unwrap(); // Nothing uses their network key in this test
7039 chan.holder_dust_limit_satoshis = 546;
7040 chan.counterparty_selected_channel_reserve_satoshis = Some(0); // Filled in in accept_channel
7042 let funding_info = OutPoint{ txid: Txid::from_hex("8984484a580b825b9972d7adb15050b3ab624ccd731946b3eeddb92f4e7ef6be").unwrap(), index: 0 };
7044 let counterparty_pubkeys = ChannelPublicKeys {
7045 funding_pubkey: public_from_secret_hex(&secp_ctx, "1552dfba4f6cf29a62a0af13c8d6981d36d0ef8d61ba10fb0fe90da7634d7e13"),
7046 revocation_basepoint: PublicKey::from_slice(&hex::decode("02466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f27").unwrap()[..]).unwrap(),
7047 payment_point: public_from_secret_hex(&secp_ctx, "4444444444444444444444444444444444444444444444444444444444444444"),
7048 delayed_payment_basepoint: public_from_secret_hex(&secp_ctx, "1552dfba4f6cf29a62a0af13c8d6981d36d0ef8d61ba10fb0fe90da7634d7e13"),
7049 htlc_basepoint: public_from_secret_hex(&secp_ctx, "4444444444444444444444444444444444444444444444444444444444444444")
7051 chan.channel_transaction_parameters.counterparty_parameters = Some(
7052 CounterpartyChannelTransactionParameters {
7053 pubkeys: counterparty_pubkeys.clone(),
7054 selected_contest_delay: 144
7056 chan.channel_transaction_parameters.funding_outpoint = Some(funding_info);
7057 signer.ready_channel(&chan.channel_transaction_parameters);
7059 assert_eq!(counterparty_pubkeys.payment_point.serialize()[..],
7060 hex::decode("032c0b7cf95324a07d05398b240174dc0c2be444d96b159aa6c7f7b1e668680991").unwrap()[..]);
7062 assert_eq!(counterparty_pubkeys.funding_pubkey.serialize()[..],
7063 hex::decode("030e9f7b623d2ccc7c9bd44d66d5ce21ce504c0acf6385a132cec6d3c39fa711c1").unwrap()[..]);
7065 assert_eq!(counterparty_pubkeys.htlc_basepoint.serialize()[..],
7066 hex::decode("032c0b7cf95324a07d05398b240174dc0c2be444d96b159aa6c7f7b1e668680991").unwrap()[..]);
7068 // We can't just use build_holder_transaction_keys here as the per_commitment_secret is not
7069 // derived from a commitment_seed, so instead we copy it here and call
7070 // build_commitment_transaction.
7071 let delayed_payment_base = &chan.holder_signer.pubkeys().delayed_payment_basepoint;
7072 let per_commitment_secret = SecretKey::from_slice(&hex::decode("1f1e1d1c1b1a191817161514131211100f0e0d0c0b0a09080706050403020100").unwrap()[..]).unwrap();
7073 let per_commitment_point = PublicKey::from_secret_key(&secp_ctx, &per_commitment_secret);
7074 let htlc_basepoint = &chan.holder_signer.pubkeys().htlc_basepoint;
7075 let keys = TxCreationKeys::derive_new(&secp_ctx, &per_commitment_point, delayed_payment_base, htlc_basepoint, &counterparty_pubkeys.revocation_basepoint, &counterparty_pubkeys.htlc_basepoint).unwrap();
7077 macro_rules! test_commitment {
7078 ( $counterparty_sig_hex: expr, $sig_hex: expr, $tx_hex: expr, $($remain:tt)* ) => {
7079 chan.channel_transaction_parameters.opt_anchors = None;
7080 test_commitment_common!($counterparty_sig_hex, $sig_hex, $tx_hex, false, $($remain)*);
7084 macro_rules! test_commitment_with_anchors {
7085 ( $counterparty_sig_hex: expr, $sig_hex: expr, $tx_hex: expr, $($remain:tt)* ) => {
7086 chan.channel_transaction_parameters.opt_anchors = Some(());
7087 test_commitment_common!($counterparty_sig_hex, $sig_hex, $tx_hex, true, $($remain)*);
7091 macro_rules! test_commitment_common {
7092 ( $counterparty_sig_hex: expr, $sig_hex: expr, $tx_hex: expr, $opt_anchors: expr, {
7093 $( { $htlc_idx: expr, $counterparty_htlc_sig_hex: expr, $htlc_sig_hex: expr, $htlc_tx_hex: expr } ), *
7095 let (commitment_tx, htlcs): (_, Vec<HTLCOutputInCommitment>) = {
7096 let mut commitment_stats = chan.build_commitment_transaction(0xffffffffffff - 42, &keys, true, false, &logger);
7098 let htlcs = commitment_stats.htlcs_included.drain(..)
7099 .filter_map(|(htlc, _)| if htlc.transaction_output_index.is_some() { Some(htlc) } else { None })
7101 (commitment_stats.tx, htlcs)
7103 let trusted_tx = commitment_tx.trust();
7104 let unsigned_tx = trusted_tx.built_transaction();
7105 let redeemscript = chan.get_funding_redeemscript();
7106 let counterparty_signature = Signature::from_der(&hex::decode($counterparty_sig_hex).unwrap()[..]).unwrap();
7107 let sighash = unsigned_tx.get_sighash_all(&redeemscript, chan.channel_value_satoshis);
7108 log_trace!(logger, "unsigned_tx = {}", hex::encode(serialize(&unsigned_tx.transaction)));
7109 assert!(secp_ctx.verify_ecdsa(&sighash, &counterparty_signature, chan.counterparty_funding_pubkey()).is_ok(), "verify counterparty commitment sig");
7111 let mut per_htlc: Vec<(HTLCOutputInCommitment, Option<Signature>)> = Vec::new();
7112 per_htlc.clear(); // Don't warn about excess mut for no-HTLC calls
7113 let mut counterparty_htlc_sigs = Vec::new();
7114 counterparty_htlc_sigs.clear(); // Don't warn about excess mut for no-HTLC calls
7116 let remote_signature = Signature::from_der(&hex::decode($counterparty_htlc_sig_hex).unwrap()[..]).unwrap();
7117 per_htlc.push((htlcs[$htlc_idx].clone(), Some(remote_signature)));
7118 counterparty_htlc_sigs.push(remote_signature);
7120 assert_eq!(htlcs.len(), per_htlc.len());
7122 let holder_commitment_tx = HolderCommitmentTransaction::new(
7123 commitment_tx.clone(),
7124 counterparty_signature,
7125 counterparty_htlc_sigs,
7126 &chan.holder_signer.pubkeys().funding_pubkey,
7127 chan.counterparty_funding_pubkey()
7129 let (holder_sig, htlc_sigs) = signer.sign_holder_commitment_and_htlcs(&holder_commitment_tx, &secp_ctx).unwrap();
7130 assert_eq!(Signature::from_der(&hex::decode($sig_hex).unwrap()[..]).unwrap(), holder_sig, "holder_sig");
7132 let funding_redeemscript = chan.get_funding_redeemscript();
7133 let tx = holder_commitment_tx.add_holder_sig(&funding_redeemscript, holder_sig);
7134 assert_eq!(serialize(&tx)[..], hex::decode($tx_hex).unwrap()[..], "tx");
7136 // ((htlc, counterparty_sig), (index, holder_sig))
7137 let mut htlc_sig_iter = holder_commitment_tx.htlcs().iter().zip(&holder_commitment_tx.counterparty_htlc_sigs).zip(htlc_sigs.iter().enumerate());
7140 log_trace!(logger, "verifying htlc {}", $htlc_idx);
7141 let remote_signature = Signature::from_der(&hex::decode($counterparty_htlc_sig_hex).unwrap()[..]).unwrap();
7143 let ref htlc = htlcs[$htlc_idx];
7144 let htlc_tx = chan_utils::build_htlc_transaction(&unsigned_tx.txid, chan.feerate_per_kw,
7145 chan.get_counterparty_selected_contest_delay().unwrap(),
7146 &htlc, $opt_anchors, &keys.broadcaster_delayed_payment_key, &keys.revocation_key);
7147 let htlc_redeemscript = chan_utils::get_htlc_redeemscript(&htlc, $opt_anchors, &keys);
7148 let htlc_sighashtype = if $opt_anchors { EcdsaSighashType::SinglePlusAnyoneCanPay } else { EcdsaSighashType::All };
7149 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();
7150 assert!(secp_ctx.verify_ecdsa(&htlc_sighash, &remote_signature, &keys.countersignatory_htlc_key).is_ok(), "verify counterparty htlc sig");
7152 let mut preimage: Option<PaymentPreimage> = None;
7155 let out = PaymentHash(Sha256::hash(&[i; 32]).into_inner());
7156 if out == htlc.payment_hash {
7157 preimage = Some(PaymentPreimage([i; 32]));
7161 assert!(preimage.is_some());
7164 let htlc_sig = htlc_sig_iter.next().unwrap();
7165 let num_anchors = if $opt_anchors { 2 } else { 0 };
7166 assert_eq!((htlc_sig.0).0.transaction_output_index, Some($htlc_idx + num_anchors), "output index");
7168 let signature = Signature::from_der(&hex::decode($htlc_sig_hex).unwrap()[..]).unwrap();
7169 assert_eq!(signature, *(htlc_sig.1).1, "htlc sig");
7170 let index = (htlc_sig.1).0;
7171 let channel_parameters = chan.channel_transaction_parameters.as_holder_broadcastable();
7172 let trusted_tx = holder_commitment_tx.trust();
7173 log_trace!(logger, "htlc_tx = {}", hex::encode(serialize(&trusted_tx.get_signed_htlc_tx(&channel_parameters, index, &(htlc_sig.0).1, (htlc_sig.1).1, &preimage))));
7174 assert_eq!(serialize(&trusted_tx.get_signed_htlc_tx(&channel_parameters, index, &(htlc_sig.0).1, (htlc_sig.1).1, &preimage))[..],
7175 hex::decode($htlc_tx_hex).unwrap()[..], "htlc tx");
7177 assert!(htlc_sig_iter.next().is_none());
7181 // simple commitment tx with no HTLCs
7182 chan.value_to_self_msat = 7000000000;
7184 test_commitment!("3045022100c3127b33dcc741dd6b05b1e63cbd1a9a7d816f37af9b6756fa2376b056f032370220408b96279808fe57eb7e463710804cdf4f108388bc5cf722d8c848d2c7f9f3b0",
7185 "30440220616210b2cc4d3afb601013c373bbd8aac54febd9f15400379a8cb65ce7deca60022034236c010991beb7ff770510561ae8dc885b8d38d1947248c38f2ae055647142",
7186 "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", {});
7188 // anchors: simple commitment tx with no HTLCs
7189 test_commitment_with_anchors!("3045022100f89034eba16b2be0e5581f750a0a6309192b75cce0f202f0ee2b4ec0cc394850022076c65dc507fe42276152b7a3d90e961e678adbe966e916ecfe85e64d430e75f3",
7190 "30450221008266ac6db5ea71aac3c95d97b0e172ff596844851a3216eb88382a8dddfd33d2022050e240974cfd5d708708b4365574517c18e7ae535ef732a3484d43d0d82be9f7",
7191 "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", {});
7193 chan.pending_inbound_htlcs.push({
7194 let mut out = InboundHTLCOutput{
7196 amount_msat: 1000000,
7198 payment_hash: PaymentHash([0; 32]),
7199 state: InboundHTLCState::Committed,
7201 out.payment_hash.0 = Sha256::hash(&hex::decode("0000000000000000000000000000000000000000000000000000000000000000").unwrap()).into_inner();
7204 chan.pending_inbound_htlcs.push({
7205 let mut out = InboundHTLCOutput{
7207 amount_msat: 2000000,
7209 payment_hash: PaymentHash([0; 32]),
7210 state: InboundHTLCState::Committed,
7212 out.payment_hash.0 = Sha256::hash(&hex::decode("0101010101010101010101010101010101010101010101010101010101010101").unwrap()).into_inner();
7215 chan.pending_outbound_htlcs.push({
7216 let mut out = OutboundHTLCOutput{
7218 amount_msat: 2000000,
7220 payment_hash: PaymentHash([0; 32]),
7221 state: OutboundHTLCState::Committed,
7222 source: HTLCSource::dummy(),
7224 out.payment_hash.0 = Sha256::hash(&hex::decode("0202020202020202020202020202020202020202020202020202020202020202").unwrap()).into_inner();
7227 chan.pending_outbound_htlcs.push({
7228 let mut out = OutboundHTLCOutput{
7230 amount_msat: 3000000,
7232 payment_hash: PaymentHash([0; 32]),
7233 state: OutboundHTLCState::Committed,
7234 source: HTLCSource::dummy(),
7236 out.payment_hash.0 = Sha256::hash(&hex::decode("0303030303030303030303030303030303030303030303030303030303030303").unwrap()).into_inner();
7239 chan.pending_inbound_htlcs.push({
7240 let mut out = InboundHTLCOutput{
7242 amount_msat: 4000000,
7244 payment_hash: PaymentHash([0; 32]),
7245 state: InboundHTLCState::Committed,
7247 out.payment_hash.0 = Sha256::hash(&hex::decode("0404040404040404040404040404040404040404040404040404040404040404").unwrap()).into_inner();
7251 // commitment tx with all five HTLCs untrimmed (minimum feerate)
7252 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
7253 chan.feerate_per_kw = 0;
7255 test_commitment!("3044022009b048187705a8cbc9ad73adbe5af148c3d012e1f067961486c822c7af08158c022006d66f3704cfab3eb2dc49dae24e4aa22a6910fc9b424007583204e3621af2e5",
7256 "304402206fc2d1f10ea59951eefac0b4b7c396a3c3d87b71ff0b019796ef4535beaf36f902201765b0181e514d04f4c8ad75659d7037be26cdb3f8bb6f78fe61decef484c3ea",
7257 "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", {
7260 "3045022100d9e29616b8f3959f1d3d7f7ce893ffedcdc407717d0de8e37d808c91d3a7c50d022078c3033f6d00095c8720a4bc943c1b45727818c082e4e3ddbc6d3116435b624b",
7261 "30440220636de5682ef0c5b61f124ec74e8aa2461a69777521d6998295dcea36bc3338110220165285594b23c50b28b82df200234566628a27bcd17f7f14404bd865354eb3ce",
7262 "02000000000101ab84ff284f162cfbfef241f853b47d4368d171f9e2a1445160cd591c4c7d882b00000000000000000001e8030000000000002200204adb4e2f00643db396dd120d4e7dc17625f5f2c11a40d857accc862d6b7dd80e0500483045022100d9e29616b8f3959f1d3d7f7ce893ffedcdc407717d0de8e37d808c91d3a7c50d022078c3033f6d00095c8720a4bc943c1b45727818c082e4e3ddbc6d3116435b624b014730440220636de5682ef0c5b61f124ec74e8aa2461a69777521d6998295dcea36bc3338110220165285594b23c50b28b82df200234566628a27bcd17f7f14404bd865354eb3ce012000000000000000000000000000000000000000000000000000000000000000008a76a91414011f7254d96b819c76986c277d115efce6f7b58763ac67210394854aa6eab5b2a8122cc726e9dded053a2184d88256816826d6231c068d4a5b7c8201208763a914b8bcb07f6344b42ab04250c86a6e8b75d3fdbbc688527c21030d417a46946384f88d5f3337267c5e579765875dc4daca813e21734b140639e752ae677502f401b175ac686800000000" },
7265 "30440220649fe8b20e67e46cbb0d09b4acea87dbec001b39b08dee7bdd0b1f03922a8640022037c462dff79df501cecfdb12ea7f4de91f99230bb544726f6e04527b1f896004",
7266 "3045022100803159dee7935dba4a1d36a61055ce8fd62caa528573cc221ae288515405a252022029c59e7cffce374fe860100a4a63787e105c3cf5156d40b12dd53ff55ac8cf3f",
7267 "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" },
7270 "30440220770fc321e97a19f38985f2e7732dd9fe08d16a2efa4bcbc0429400a447faf49102204d40b417f3113e1b0944ae0986f517564ab4acd3d190503faf97a6e420d43352",
7271 "3045022100a437cc2ce77400ecde441b3398fea3c3ad8bdad8132be818227fe3c5b8345989022069d45e7fa0ae551ec37240845e2c561ceb2567eacf3076a6a43a502d05865faa",
7272 "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" },
7275 "304402207bcbf4f60a9829b05d2dbab84ed593e0291836be715dc7db6b72a64caf646af802201e489a5a84f7c5cc130398b841d138d031a5137ac8f4c49c770a4959dc3c1363",
7276 "304402203121d9b9c055f354304b016a36662ee99e1110d9501cb271b087ddb6f382c2c80220549882f3f3b78d9c492de47543cb9a697cecc493174726146536c5954dac7487",
7277 "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" },
7280 "3044022076dca5cb81ba7e466e349b7128cdba216d4d01659e29b96025b9524aaf0d1899022060de85697b88b21c749702b7d2cfa7dfeaa1f472c8f1d7d9c23f2bf968464b87",
7281 "3045022100d9080f103cc92bac15ec42464a95f070c7fb6925014e673ee2ea1374d36a7f7502200c65294d22eb20d48564954d5afe04a385551919d8b2ddb4ae2459daaeee1d95",
7282 "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" }
7285 // commitment tx with seven outputs untrimmed (maximum feerate)
7286 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
7287 chan.feerate_per_kw = 647;
7289 test_commitment!("3045022100a135f9e8a5ed25f7277446c67956b00ce6f610ead2bdec2c2f686155b7814772022059f1f6e1a8b336a68efcc1af3fe4d422d4827332b5b067501b099c47b7b5b5ee",
7290 "30450221009ec15c687898bb4da8b3a833e5ab8bfc51ec6e9202aaa8e66611edfd4a85ed1102203d7183e45078b9735c93450bc3415d3e5a8c576141a711ec6ddcb4a893926bb7",
7291 "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", {
7294 "30450221008437627f9ad84ac67052e2a414a4367b8556fd1f94d8b02590f89f50525cd33502205b9c21ff6e7fc864f2352746ad8ba59182510819acb644e25b8a12fc37bbf24f",
7295 "30440220344b0deb055230d01703e6c7acd45853c4af2328b49b5d8af4f88a060733406602202ea64f2a43d5751edfe75503cbc35a62e3141b5ed032fa03360faf4ca66f670b",
7296 "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" },
7299 "304402205a67f92bf6845cf2892b48d874ac1daf88a36495cf8a06f93d83180d930a6f75022031da1621d95c3f335cc06a3056cf960199dae600b7cf89088f65fc53cdbef28c",
7300 "30450221009e5e3822b0185c6799a95288c597b671d6cc69ab80f43740f00c6c3d0752bdda02206da947a74bd98f3175324dc56fdba86cc783703a120a6f0297537e60632f4c7f",
7301 "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" },
7304 "30440220437e21766054a3eef7f65690c5bcfa9920babbc5af92b819f772f6ea96df6c7402207173622024bd97328cfb26c6665e25c2f5d67c319443ccdc60c903217005d8c8",
7305 "3045022100fcfc47e36b712624677626cef3dc1d67f6583bd46926a6398fe6b00b0c9a37760220525788257b187fc775c6370d04eadf34d06f3650a63f8df851cee0ecb47a1673",
7306 "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" },
7309 "304402207436e10737e4df499fc051686d3e11a5bb2310e4d1f1e691d287cef66514791202207cb58e71a6b7a42dd001b7e3ae672ea4f71ea3e1cd412b742e9124abb0739c64",
7310 "3045022100e78211b8409afb7255ffe37337da87f38646f1faebbdd61bc1920d69e3ead67a02201a626305adfcd16bfb7e9340928d9b6305464eab4aa4c4a3af6646e9b9f69dee",
7311 "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" },
7314 "30450221009acd6a827a76bfee50806178dfe0495cd4e1d9c58279c194c7b01520fe68cb8d022024d439047c368883e570997a7d40f0b430cb5a742f507965e7d3063ae3feccca",
7315 "3044022048762cf546bbfe474f1536365ea7c416e3c0389d60558bc9412cb148fb6ab68202207215d7083b75c96ff9d2b08c59c34e287b66820f530b486a9aa4cdd9c347d5b9",
7316 "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" }
7319 // anchors: commitment tx with seven outputs untrimmed (maximum feerate)
7320 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
7321 chan.feerate_per_kw = 644;
7323 test_commitment_with_anchors!("3045022100e0106830467a558c07544a3de7715610c1147062e7d091deeebe8b5c661cda9402202ad049c1a6d04834317a78483f723c205c9f638d17222aafc620800cc1b6ae35",
7324 "3045022100ef82a405364bfc4007e63a7cc82925a513d79065bdbc216d60b6a4223a323f8a02200716730b8561f3c6d362eaf47f202e99fb30d0557b61b92b5f9134f8e2de3681",
7325 "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", {
7328 "304402205912d91c58016f593d9e46fefcdb6f4125055c41a17b03101eaaa034b9028ab60220520d4d239c85c66e4c75c5b413620b62736e227659d7821b308e2b8ced3e728e",
7329 "30440220473166a5adcca68550bab80403f410a726b5bd855030527e3fefa8c1e4b4fd7b02203b1dc91d8d69039473036cb5c34398b99e8eb90ae500c22130a557b62294b188",
7330 "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" },
7333 "3045022100c6b4113678039ee1e43a6cba5e3224ed2355ffc05e365a393afe8843dc9a76860220566d01fd52d65a89ba8595023884f9e8f2e9a310a6b9b85281c0bce06863430c",
7334 "3045022100d0d86307ea55d5daa80f453ad6d64b78fe8a6504aac25407c73e8502c0702c1602206a0809a02aa00c8dc4a53d976bb05d4605d8bb0b7b26b973a5c4e2734d8afbb4",
7335 "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" },
7338 "304402203c3a699fb80a38112aafd73d6e3a9b7d40bc2c3ed8b7fbc182a20f43b215172202204e71821b984d1af52c4b8e2cd4c572578c12a965866130c2345f61e4c2d3fef4",
7339 "304402205bcfa92f83c69289a412b0b6dd4f2a0fe0b0fc2d45bd74706e963257a09ea24902203783e47883e60b86240e877fcbf33d50b1742f65bc93b3162d1be26583b367ee",
7340 "02000000000101b8cefef62ea66f5178b9361b2371be0759cbc8c689bcfa7a8e6746d497ec221a040000000001000000010a060000000000002200204adb4e2f00643db396dd120d4e7dc17625f5f2c11a40d857accc862d6b7dd80e050047304402203c3a699fb80a38112aafd73d6e3a9b7d40bc2c3ed8b7fbc182a20f43b215172202204e71821b984d1af52c4b8e2cd4c572578c12a965866130c2345f61e4c2d3fef48347304402205bcfa92f83c69289a412b0b6dd4f2a0fe0b0fc2d45bd74706e963257a09ea24902203783e47883e60b86240e877fcbf33d50b1742f65bc93b3162d1be26583b367ee012001010101010101010101010101010101010101010101010101010101010101018d76a91414011f7254d96b819c76986c277d115efce6f7b58763ac67210394854aa6eab5b2a8122cc726e9dded053a2184d88256816826d6231c068d4a5b7c8201208763a9144b6b2e5444c2639cc0fb7bcea5afba3f3cdce23988527c21030d417a46946384f88d5f3337267c5e579765875dc4daca813e21734b140639e752ae677502f501b175ac6851b2756800000000" },
7343 "304402200f089bcd20f25475216307d32aa5b6c857419624bfba1da07335f51f6ba4645b02206ce0f7153edfba23b0d4b2afc26bb3157d404368cb8ea0ca7cf78590dcdd28cf",
7344 "3045022100e4516da08f72c7a4f7b2f37aa84a0feb54ae2cc5b73f0da378e81ae0ca8119bf02207751b2628d8e2f62b4b9abccda4866246c1bfcc82e3d416ad562fd212102c28f",
7345 "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" },
7348 "3045022100aa72cfaf0965020c73a12c77276c6411ca68c4de36ac1998adf86c917a899a43022060da0a159fecfe0bed37c3962d767f12f90e30fed8a8f34b1301775c21a2bd3a",
7349 "304402203cd12065c2a42963c762e6b1a981e17695616ecb6f9fb33d8b0717cdd7ca0ee4022065500005c491c1dcf2fe9c4024f74b1c90785d572527055a491278f901143904",
7350 "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" }
7353 // commitment tx with six outputs untrimmed (minimum feerate)
7354 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
7355 chan.feerate_per_kw = 648;
7357 test_commitment!("304402203948f900a5506b8de36a4d8502f94f21dd84fd9c2314ab427d52feaa7a0a19f2022059b6a37a4adaa2c5419dc8aea63c6e2a2ec4c4bde46207f6dc1fcd22152fc6e5",
7358 "3045022100b15f72908ba3382a34ca5b32519240a22300cc6015b6f9418635fb41f3d01d8802207adb331b9ed1575383dca0f2355e86c173802feecf8298fbea53b9d4610583e9",
7359 "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", {
7362 "3045022100a031202f3be94678f0e998622ee95ebb6ada8da1e9a5110228b5e04a747351e4022010ca6a21e18314ed53cfaae3b1f51998552a61a468e596368829a50ce40110e0",
7363 "304502210097e1873b57267730154595187a34949d3744f52933070c74757005e61ce2112e02204ecfba2aa42d4f14bdf8bad4206bb97217b702e6c433e0e1b0ce6587e6d46ec6",
7364 "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" },
7367 "304402202361012a634aee7835c5ecdd6413dcffa8f404b7e77364c792cff984e4ee71e90220715c5e90baa08daa45a7439b1ee4fa4843ed77b19c058240b69406606d384124",
7368 "3044022019de73b00f1d818fb388e83b2c8c31f6bce35ac624e215bc12f88f9dc33edf48022006ff814bb9f700ee6abc3294e146fac3efd4f13f0005236b41c0a946ee00c9ae",
7369 "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" },
7372 "304402207e8e82cd71ed4febeb593732c260456836e97d81896153ecd2b3cf320ca6861702202dd4a30f68f98ced7cc56a36369ac1fdd978248c5ff4ed204fc00cc625532989",
7373 "3045022100bd0be6100c4fd8f102ec220e1b053e4c4e2ecca25615490150007b40d314dc3902201a1e0ea266965b43164d9e6576f58fa6726d42883dd1c3996d2925c2e2260796",
7374 "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" },
7377 "3044022024cd52e4198c8ae0e414a86d86b5a65ea7450f2eb4e783096736d93395eca5ce022078f0094745b45be4d4b2b04dd5978c9e66ba49109e5704403e84aaf5f387d6be",
7378 "3045022100bbfb9d0a946d420807c86e985d636cceb16e71c3694ed186316251a00cbd807202207773223f9a337e145f64673825be9b30d07ef1542c82188b264bedcf7cda78c6",
7379 "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" }
7382 // anchors: commitment tx with six outputs untrimmed (minimum feerate)
7383 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
7384 chan.feerate_per_kw = 645;
7386 test_commitment_with_anchors!("3044022025d97466c8049e955a5afce28e322f4b34d2561118e52332fb400f9b908cc0a402205dc6fba3a0d67ee142c428c535580cd1f2ff42e2f89b47e0c8a01847caffc312",
7387 "3045022100d57697c707b6f6d053febf24b98e8989f186eea42e37e9e91663ec2c70bb8f70022079b0715a472118f262f43016a674f59c015d9cafccec885968e76d9d9c5d0051",
7388 "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", {
7391 "30440220446f9e5c375db6a61d6eeee8b59219a30a4a37372afc2670a1a2889c78e9b943022061895f6088fb48b490ab2140a4842c277b64bf25ff591625dd0356e0c96ab7a8",
7392 "3045022100c1621ba26a99c263fd885feff5fda5ca2cc73df080b3a49ecf15164ee244d2a5022037f4cc7fd4441af39a83a0e44c3b1db7d64a4c8080e8697f9e952f85421a34d8",
7393 "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" },
7396 "3044022027a3ffcb8a007e3349d75382efbd4b3fb99fcbd479a18555e58697bd1278d5c402205c8303d46211c3ae8975fe84a0df08b4623119fecd03bc93b49d7f7a0c64c710",
7397 "3045022100b697aca55c6fb15e5348bb7387b584815fd15e8dd306afe0c477cb550d0c2d40022050b0f7e370f7604d2fec781fefe86715dbe95dff4dab88d628f509d62f854de1",
7398 "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" },
7401 "30440220013975ae356e6daf22a86a29f21c4f35aca82ed8f731a1103c60c74f5ed1c5aa02200350d4e5455cdbcacb7ccf174db5bed8286019e509a113f6b4c5e606ee12c9d7",
7402 "3045022100e69a29f78779577830e73f327073c93168896f1b89432124b7846f5def9cd9cb02204433db3697e6ed7ac89574ca066a749640e0c9e114ac2e0ee4545741fcf7b7e9",
7403 "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" },
7406 "304402205257017423644c7e831f30bc0c334eecfe66e9a6d2e92d157c5bece576b2be4f022047b21cf8e955e22b7471940563922d1a5852fb95459ca32905c7d46a19141664",
7407 "304402204f5de65a624e3f757adffb678bd887eb4e656538c5ea7044922f6ee3eed8a06202206ff6f7bfe73b565343cae76131ac658f1a9c60d3ca2343358cda60b9e35f94c8",
7408 "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" }
7411 // commitment tx with six outputs untrimmed (maximum feerate)
7412 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
7413 chan.feerate_per_kw = 2069;
7415 test_commitment!("304502210090b96a2498ce0c0f2fadbec2aab278fed54c1a7838df793ec4d2c78d96ec096202204fdd439c50f90d483baa7b68feeef4bd33bc277695405447bcd0bfb2ca34d7bc",
7416 "3045022100ad9a9bbbb75d506ca3b716b336ee3cf975dd7834fcf129d7dd188146eb58a8b4022061a759ee417339f7fe2ea1e8deb83abb6a74db31a09b7648a932a639cda23e33",
7417 "02000000000101bef67e4e2fb9ddeeb3461973cd4c62abb35050b1add772995b820b584a488489000000000038b02b8006d007000000000000220020403d394747cae42e98ff01734ad5c08f82ba123d3d9a620abda88989651e2ab5d007000000000000220020748eba944fedc8827f6b06bc44678f93c0f9e6078b35c6331ed31e75f8ce0c2db80b000000000000220020c20b5d1f8584fd90443e7b7b720136174fa4b9333c261d04dbbd012635c0f419a00f0000000000002200208c48d15160397c9731df9bc3b236656efb6665fbfe92b4a6878e88a499f741c4c0c62d0000000000160014cc1b07838e387deacd0e5232e1e8b49f4c29e48477956a00000000002200204adb4e2f00643db396dd120d4e7dc17625f5f2c11a40d857accc862d6b7dd80e0400483045022100ad9a9bbbb75d506ca3b716b336ee3cf975dd7834fcf129d7dd188146eb58a8b4022061a759ee417339f7fe2ea1e8deb83abb6a74db31a09b7648a932a639cda23e330148304502210090b96a2498ce0c0f2fadbec2aab278fed54c1a7838df793ec4d2c78d96ec096202204fdd439c50f90d483baa7b68feeef4bd33bc277695405447bcd0bfb2ca34d7bc01475221023da092f6980e58d2c037173180e9a465476026ee50f96695963e8efe436f54eb21030e9f7b623d2ccc7c9bd44d66d5ce21ce504c0acf6385a132cec6d3c39fa711c152ae3e195220", {
7420 "3045022100f33513ee38abf1c582876f921f8fddc06acff48e04515532a32d3938de938ffd02203aa308a2c1863b7d6fdf53159a1465bf2e115c13152546cc5d74483ceaa7f699",
7421 "3045022100a637902a5d4c9ba9e7c472a225337d5aac9e2e3f6744f76e237132e7619ba0400220035c60d784a031c0d9f6df66b7eab8726a5c25397399ee4aa960842059eb3f9d",
7422 "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" },
7425 "3045022100ce07682cf4b90093c22dc2d9ab2a77ad6803526b655ef857221cc96af5c9e0bf02200f501cee22e7a268af40b555d15a8237c9f36ad67ef1841daf9f6a0267b1e6df",
7426 "3045022100e57e46234f8782d3ff7aa593b4f7446fb5316c842e693dc63ee324fd49f6a1c302204a2f7b44c48bd26e1554422afae13153eb94b29d3687b733d18930615fb2db61",
7427 "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" },
7430 "3045022100e3e35492e55f82ec0bc2f317ffd7a486d1f7024330fe9743c3559fc39f32ef0c02203d1d4db651fc388a91d5ad8ecdd8e83673063bc8eefe27cfd8c189090e3a23e0",
7431 "3044022068613fb1b98eb3aec7f44c5b115b12343c2f066c4277c82b5f873dfe68f37f50022028109b4650f3f528ca4bfe9a467aff2e3e43893b61b5159157119d5d95cf1c18",
7432 "02000000000101adbe717a63fb658add30ada1e6e12ed257637581898abe475c11d7bbcd65bd4d020000000000000000015d060000000000002200204adb4e2f00643db396dd120d4e7dc17625f5f2c11a40d857accc862d6b7dd80e0500483045022100e3e35492e55f82ec0bc2f317ffd7a486d1f7024330fe9743c3559fc39f32ef0c02203d1d4db651fc388a91d5ad8ecdd8e83673063bc8eefe27cfd8c189090e3a23e001473044022068613fb1b98eb3aec7f44c5b115b12343c2f066c4277c82b5f873dfe68f37f50022028109b4650f3f528ca4bfe9a467aff2e3e43893b61b5159157119d5d95cf1c1801008576a91414011f7254d96b819c76986c277d115efce6f7b58763ac67210394854aa6eab5b2a8122cc726e9dded053a2184d88256816826d6231c068d4a5b7c820120876475527c21030d417a46946384f88d5f3337267c5e579765875dc4daca813e21734b140639e752ae67a9148a486ff2e31d6158bf39e2608864d63fefd09d5b88ac6868f7010000" },
7435 "304402207475aeb0212ef9bf5130b60937817ad88c9a87976988ef1f323f026148cc4a850220739fea17ad3257dcad72e509c73eebe86bee30b178467b9fdab213d631b109df",
7436 "3045022100d315522e09e7d53d2a659a79cb67fef56d6c4bddf3f46df6772d0d20a7beb7c8022070bcc17e288607b6a72be0bd83368bb6d53488db266c1cdb4d72214e4f02ac33",
7437 "02000000000101adbe717a63fb658add30ada1e6e12ed257637581898abe475c11d7bbcd65bd4d03000000000000000001f2090000000000002200204adb4e2f00643db396dd120d4e7dc17625f5f2c11a40d857accc862d6b7dd80e050047304402207475aeb0212ef9bf5130b60937817ad88c9a87976988ef1f323f026148cc4a850220739fea17ad3257dcad72e509c73eebe86bee30b178467b9fdab213d631b109df01483045022100d315522e09e7d53d2a659a79cb67fef56d6c4bddf3f46df6772d0d20a7beb7c8022070bcc17e288607b6a72be0bd83368bb6d53488db266c1cdb4d72214e4f02ac33012004040404040404040404040404040404040404040404040404040404040404048a76a91414011f7254d96b819c76986c277d115efce6f7b58763ac67210394854aa6eab5b2a8122cc726e9dded053a2184d88256816826d6231c068d4a5b7c8201208763a91418bc1a114ccf9c052d3d23e28d3b0a9d1227434288527c21030d417a46946384f88d5f3337267c5e579765875dc4daca813e21734b140639e752ae677502f801b175ac686800000000" }
7440 // anchors: commitment tx with six outputs untrimmed (maximum feerate)
7441 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
7442 chan.feerate_per_kw = 2060;
7444 test_commitment_with_anchors!("304402206208aeb34e404bd052ce3f298dfa832891c9d42caec99fe2a0d2832e9690b94302201b034bfcc6fa9faec667a9b7cbfe0b8d85e954aa239b66277887b5088aff08c3",
7445 "304402201ce37a44b95213358c20f44404d6db7a6083bea6f58de6c46547ae41a47c9f8202206db1d45be41373e92f90d346381febbea8c78671b28c153e30ad1db3441a9497",
7446 "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", {
7449 "30440220011f999016570bbab9f3125377d0f35096b4dbe155f97c20f71829ead2817d1602201f23f7e17f6928734601c5d8613431eed5c90aa41c3106e8c1cb02ce32aacb5d",
7450 "3044022017da96dfb0eb4061fa0162dc6fa6b2e07ecc5040ab5e6cb07be59838460b3e58022079371ffc95002cc1dc2891ec38198c9c25aca8164304fe114f1b55e2ffd1ddd5",
7451 "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" },
7454 "304402202d2d9681409b0a0987bd4a268ffeb112df85c4c988ac2a3a2475cb00a61912c302206aa4f4d1388b7d3282bc847871af3cca30766cc8f1064e3a41ec7e82221e10f7",
7455 "304402206426d67911aa6ff9b1cb147b093f3f65a37831a86d7c741d999afc0666e1773d022000bb71821650c70ea58d9bcdd03af736c41a5a8159d436c3ee0408a07394dcce",
7456 "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" },
7459 "3045022100f51cdaa525b7d4304548c642bb7945215eb5ae7d32874517cde67ca23ab0a12202206286d59e4b19926c6ac844be6f3ab8149a1ddb9c70f5026b7e83e40a6c08e6e1",
7460 "304502210091b16b1ac63b867e7a5ca0344f7b2aa1cdd49d4b72eac86a31e7ec6f069e20640220402bfb571ba3a9c49e3b0061c89303453803d0241059d899222aaac4799b5076",
7461 "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" },
7464 "304402202f058d99cb5a54f90773d43ba4e7a0089efd9f8269ef2da1b85d48a3e230555402205acc4bd6561830867d45cd7b84bba9fa35ad2b345016471c1737142bc99782c4",
7465 "304402202913f9cacea54efd2316cffa91219def9e0e111977216c1e76e9da80befab14f022000a9a69e8f37ebe4a39107ab50fab0dde537334588f8f412bbaca57b179b87a6",
7466 "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" }
7469 // commitment tx with five outputs untrimmed (minimum feerate)
7470 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
7471 chan.feerate_per_kw = 2070;
7473 test_commitment!("304402204ca1ba260dee913d318271d86e10ca0f5883026fb5653155cff600fb40895223022037b145204b7054a40e08bb1fefbd826f827b40838d3e501423bcc57924bcb50c",
7474 "3044022001014419b5ba00e083ac4e0a85f19afc848aacac2d483b4b525d15e2ae5adbfe022015ebddad6ee1e72b47cb09f3e78459da5be01ccccd95dceca0e056a00cc773c1",
7475 "02000000000101bef67e4e2fb9ddeeb3461973cd4c62abb35050b1add772995b820b584a488489000000000038b02b8005d007000000000000220020403d394747cae42e98ff01734ad5c08f82ba123d3d9a620abda88989651e2ab5b80b000000000000220020c20b5d1f8584fd90443e7b7b720136174fa4b9333c261d04dbbd012635c0f419a00f0000000000002200208c48d15160397c9731df9bc3b236656efb6665fbfe92b4a6878e88a499f741c4c0c62d0000000000160014cc1b07838e387deacd0e5232e1e8b49f4c29e484da966a00000000002200204adb4e2f00643db396dd120d4e7dc17625f5f2c11a40d857accc862d6b7dd80e0400473044022001014419b5ba00e083ac4e0a85f19afc848aacac2d483b4b525d15e2ae5adbfe022015ebddad6ee1e72b47cb09f3e78459da5be01ccccd95dceca0e056a00cc773c10147304402204ca1ba260dee913d318271d86e10ca0f5883026fb5653155cff600fb40895223022037b145204b7054a40e08bb1fefbd826f827b40838d3e501423bcc57924bcb50c01475221023da092f6980e58d2c037173180e9a465476026ee50f96695963e8efe436f54eb21030e9f7b623d2ccc7c9bd44d66d5ce21ce504c0acf6385a132cec6d3c39fa711c152ae3e195220", {
7478 "304402205f6b6d12d8d2529fb24f4445630566cf4abbd0f9330ab6c2bdb94222d6a2a0c502202f556258ae6f05b193749e4c541dfcc13b525a5422f6291f073f15617ba8579b",
7479 "30440220150b11069454da70caf2492ded9e0065c9a57f25ac2a4c52657b1d15b6c6ed85022068a38833b603c8892717206383611bad210f1cbb4b1f87ea29c6c65b9e1cb3e5",
7480 "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" },
7483 "3045022100f960dfb1c9aee7ce1437efa65b523e399383e8149790e05d8fed27ff6e42fe0002202fe8613e062ffe0b0c518cc4101fba1c6de70f64a5bcc7ae663f2efae43b8546",
7484 "30450221009a6ed18e6873bc3644332a6ee21c152a5b102821865350df7a8c74451a51f9f2022050d801fb4895d7d7fbf452824c0168347f5c0cbe821cf6a97a63af5b8b2563c6",
7485 "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" },
7488 "3045022100ae5fc7717ae684bc1fcf9020854e5dbe9842c9e7472879ac06ff95ac2bb10e4e022057728ada4c00083a3e65493fb5d50a232165948a1a0f530ef63185c2c8c56504",
7489 "30440220408ad3009827a8fccf774cb285587686bfb2ed041f89a89453c311ce9c8ee0f902203c7392d9f8306d3a46522a66bd2723a7eb2628cb2d9b34d4c104f1766bf37502",
7490 "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" }
7493 // anchors: commitment tx with five outputs untrimmed (minimum feerate)
7494 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
7495 chan.feerate_per_kw = 2061;
7497 test_commitment_with_anchors!("3045022100a2faf2ad7e323b2a82e07dc40b6847207ca6ad7b089f2c21dea9a4d37e52d59d02204c9480ce0358eb51d92a4342355a97e272e3cc45f86c612a76a3fe32fc3c4cb4",
7498 "304402204ab07c659412dd2cd6043b1ad811ab215e901b6b5653e08cb3d2fe63d3e3dc57022031c7b3d130f9380ef09581f4f5a15cb6f359a2e0a597146b96c3533a26d6f4cd",
7499 "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", {
7502 "3045022100e10744f572a2cd1d787c969e894b792afaed21217ee0480df0112d2fa3ef96ea02202af4f66eb6beebc36d8e98719ed6b4be1b181659fcb561fc491d8cfebff3aa85",
7503 "3045022100c3dc3ea50a0ca20e350f97b50c52c5514717cfa36cb9600918caac5cb556842b022049af018d676dde0c8e28ecf325f3ff5c1594261c4f7511d501f9d62d0594d2a2",
7504 "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" },
7507 "3045022100e1f51fb72fec604b029b348a3bb6363454e1869f5b1e24fd736f860c8039f8070220030a2c90186437d8c9b47d4897798c024521b1274991c4cdc125970b346094b1",
7508 "3045022100ec7ade6037e531629f24390ca9713782a04d648065d17fbe6b015981cdb296c202202d61049a6ecba2fb5314f3edcda2361cad187a89bea6e5d15185354d80c0c085",
7509 "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" },
7512 "304402203479f81a1d83c516957679dc98bf91d35deada967739a8e3869e3e8db08246130220053c8e154b97e3019048dcec3d51bfaf396f36861fbda6d33f0e2a57155c8b9f",
7513 "3045022100a558eb5caa04e35a4417c1f0123ac12eec5f6badee28f5764dc6b69486e594f802201589b12784e242f205832d2d032149bd4e79433ec304c05394241fc7dcba5a71",
7514 "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" }
7517 // commitment tx with five outputs untrimmed (maximum feerate)
7518 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
7519 chan.feerate_per_kw = 2194;
7521 test_commitment!("304402204bb3d6e279d71d9da414c82de42f1f954267c762b2e2eb8b76bc3be4ea07d4b0022014febc009c5edc8c3fc5d94015de163200f780046f1c293bfed8568f08b70fb3",
7522 "3044022072c2e2b1c899b2242656a537dde2892fa3801be0d6df0a87836c550137acde8302201654aa1974d37a829083c3ba15088689f30b56d6a4f6cb14c7bad0ee3116d398",
7523 "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", {
7526 "3045022100939726680351a7856c1bc386d4a1f422c7d29bd7b56afc139570f508474e6c40022023175a799ccf44c017fbaadb924c40b2a12115a5b7d0dfd3228df803a2de8450",
7527 "304502210099c98c2edeeee6ec0fb5f3bea8b79bb016a2717afa9b5072370f34382de281d302206f5e2980a995e045cf90a547f0752a7ee99d48547bc135258fe7bc07e0154301",
7528 "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" },
7531 "3044022021bb883bf324553d085ba2e821cad80c28ef8b303dbead8f98e548783c02d1600220638f9ef2a9bba25869afc923f4b5dc38be3bb459f9efa5d869392d5f7779a4a0",
7532 "3045022100fd85bd7697b89c08ec12acc8ba89b23090637d83abd26ca37e01ae93e67c367302202b551fe69386116c47f984aab9c8dfd25d864dcde5d3389cfbef2447a85c4b77",
7533 "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" },
7536 "3045022100c9e6f0454aa598b905a35e641a70cc9f67b5f38cc4b00843a041238c4a9f1c4a0220260a2822a62da97e44583e837245995ca2e36781769c52f19e498efbdcca262b",
7537 "30450221008a9f2ea24cd455c2b64c1472a5fa83865b0a5f49a62b661801e884cf2849af8302204d44180e50bf6adfcf1c1e581d75af91aba4e28681ce4a5ee5f3cbf65eca10f3",
7538 "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" }
7541 // anchors: commitment tx with five outputs untrimmed (maximum feerate)
7542 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
7543 chan.feerate_per_kw = 2184;
7545 test_commitment_with_anchors!("3044022013d326f80ff7607cf366c823fcbbcb7a2b10322484825f151e6c4c756af24b8f02201ba05b9d8beb7cea2947f9f4d9e03f90435e93db2dd48b32eb9ca3f3dd042c79",
7546 "30440220555c05261f72c5b4702d5c83a608630822b473048724b08640d6e75e345094250220448950b74a96a56963928ba5db8b457661a742c855e69d239b3b6ab73de307a3",
7547 "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", {
7550 "304402202e03ba1390998b3487e9a7fefcb66814c09abea0ef1bcc915dbaefbcf310569a02206bd10493a105ac69048e9bcedcb8e3301ef81b55018d911a4afd297297f98d30",
7551 "304402200c3952ca04be0c60dcc0b7873a0829f560607524943554ae4a27d8d967166199022021a68657b88e22f9bf9ac6065be412685aff643d17049f04f2e99e86197dabb1",
7552 "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" },
7555 "304402201f8a6adda2403bc400c919ea69d72d315337291e00d02cde085ea32953dbc50002202d65230da98df7af8ebefd2b60b457d0945232988ee2d7460a94a77d414a9acc",
7556 "3045022100ea69c9273b8914ac62b5b7082d6ac1da2b7b065ebf2ef3cd6403f5305ce3f26802203d98736ea97638895a898dfcc5ee0d0c55eb496b3964df0bb25d223688ea8b87",
7557 "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" },
7560 "3045022100ea6e4c9b8f56dd9cf5799492a201cdd65b8bc9bc089c3cff34107896ae313f90022034760f7760975cc68e8917a7f62894e25583da7be11af557c4fc402661d0cbf8",
7561 "30440220717012f2f7ef6cac590aaf66c2109132c93ffba245959ac62d82e394ba80191302203f00fd9cb37c92c6b0ad4b33e62c3e55b04e5c2cfa0adcca5a9bc49774eeca8a",
7562 "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" }
7565 // commitment tx with four outputs untrimmed (minimum feerate)
7566 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
7567 chan.feerate_per_kw = 2195;
7569 test_commitment!("304402201a8c1b1f9671cd9e46c7323a104d7047cc48d3ee80d40d4512e0c72b8dc65666022066d7f9a2ce18c9eb22d2739ffcce05721c767f9b607622a31b6ea5793ddce403",
7570 "3044022044d592025b610c0d678f65032e87035cdfe89d1598c522cc32524ae8172417c30220749fef9d5b2ae8cdd91ece442ba8809bc891efedae2291e578475f97715d1767",
7571 "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", {
7574 "3045022100e57b845066a06ee7c2cbfc29eabffe52daa9bf6f6de760066d04df9f9b250e0002202ffb197f0e6e0a77a75a9aff27014bd3de83b7f748d7efef986abe655e1dd50e",
7575 "3045022100ecc8c6529d0b2316d046f0f0757c1e1c25a636db168ec4f3aa1b9278df685dc0022067ae6b65e936f1337091f7b18a15935b608c5f2cdddb2f892ed0babfdd376d76",
7576 "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" },
7579 "3045022100d193b7ecccad8057571620a0b1ffa6c48e9483311723b59cf536043b20bc51550220546d4bd37b3b101ecda14f6c907af46ec391abce1cd9c7ce22b1a62b534f2f2a",
7580 "3044022014d66f11f9cacf923807eba49542076c5fe5cccf252fb08fe98c78ef3ca6ab5402201b290dbe043cc512d9d78de074a5a129b8759bc6a6c546b190d120b690bd6e82",
7581 "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" }
7584 // anchors: commitment tx with four outputs untrimmed (minimum feerate)
7585 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
7586 chan.feerate_per_kw = 2185;
7588 test_commitment_with_anchors!("3044022040f63a16148cf35c8d3d41827f5ae7f7c3746885bb64d4d1b895892a83812b3e02202fcf95c2bf02c466163b3fa3ced6a24926fbb4035095a96842ef516e86ba54c0",
7589 "3045022100cd8479cfe1edb1e5a1d487391e0451a469c7171e51e680183f19eb4321f20e9b02204eab7d5a6384b1b08e03baa6e4d9748dfd2b5ab2bae7e39604a0d0055bbffdd5",
7590 "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", {
7593 "304502210094480e38afb41d10fae299224872f19c53abe23c7033a1c0642c48713e7863a10220726dd9456407682667dc4bd9c66975acb3744961770b5002f7eb9c0df9ef2f3e",
7594 "304402203148dac61513dc0361738cba30cb341a1e580f8acd5ab0149bf65bd670688cf002207e5d9a0fcbbea2c263bc714fa9e9c44d7f582ea447f366119fc614a23de32f1f",
7595 "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" },
7598 "304402200dbde868dbc20c6a2433fe8979ba5e3f966b1c2d1aeb615f1c42e9c938b3495402202eec5f663c8b601c2061c1453d35de22597c137d1907a2feaf714d551035cb6e",
7599 "3045022100b896bded41d7feac7af25c19e35c53037c53b50e73cfd01eb4ba139c7fdf231602203a3be049d3d89396c4dc766d82ce31e237da8bc3a93e2c7d35992d1932d9cfeb",
7600 "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" }
7603 // commitment tx with four outputs untrimmed (maximum feerate)
7604 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
7605 chan.feerate_per_kw = 3702;
7607 test_commitment!("304502210092a587aeb777f869e7ff0d7898ea619ee26a3dacd1f3672b945eea600be431100220077ee9eae3528d15251f2a52b607b189820e57a6ccfac8d1af502b132ee40169",
7608 "3045022100e5efb73c32d32da2d79702299b6317de6fb24a60476e3855926d78484dd1b3c802203557cb66a42c944ef06e00bcc4da35a5bcb2f185aab0f8e403e519e1d66aaf75",
7609 "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", {
7612 "304402206fa54c11f98c3bae1e93df43fc7affeb05b476bf8060c03e29c377c69bc08e8b0220672701cce50d5c379ff45a5d2cfe48ac44973adb066ac32608e21221d869bb89",
7613 "304402206e36c683ebf2cb16bcef3d5439cf8b53cd97280a365ed8acd7abb85a8ba5f21c02206e8621edfc2a5766cbc96eb67fd501127ff163eb6b85518a39f7d4974aef126f",
7614 "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" },
7617 "3044022057649739b0eb74d541ead0dfdb3d4b2c15aa192720031044c3434c67812e5ca902201e5ede42d960ae551707f4a6b34b09393cf4dee2418507daa022e3550dbb5817",
7618 "304402207faad26678c8850e01b4a0696d60841f7305e1832b786110ee9075cb92ed14a30220516ef8ee5dfa80824ea28cbcec0dd95f8b847146257c16960db98507db15ffdc",
7619 "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" }
7622 // anchors: commitment tx with four outputs untrimmed (maximum feerate)
7623 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
7624 chan.feerate_per_kw = 3686;
7626 test_commitment_with_anchors!("30440220784485cf7a0ad7979daf2c858ffdaf5298d0020cea7aea466843e7948223bd9902206031b81d25e02a178c64e62f843577fdcdfc7a1decbbfb54cd895de692df85ca",
7627 "3045022100c268496aad5c3f97f25cf41c1ba5483a12982de29b222051b6de3daa2229413b02207f3c82d77a2c14f0096ed9bb4c34649483bb20fa71f819f71af44de6593e8bb2",
7628 "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", {
7631 "304402202cfe6618926ca9f1574f8c4659b425e9790b4677ba2248d77901290806130ffe02204ab37bb0287abcdb8b750b018d41a09effe37cb65ff801fa70d3f1a416599841",
7632 "3044022030b318139715e3b34f19be852cc01c1c0e1599e8b926a73df2bfb70dd186ddee022062a2b7398aed9f563b4014da04a1a99debd0ff663ceece68a547df5982dc2d72",
7633 "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" },
7636 "30440220687af8544d335376620a6f4b5412bfd0da48de047c1785674f26e669d4a3ff82022058591c1e3a6c50017427d38a8f756eb685bdab88ec73838eed3530048861f9d5",
7637 "30440220109f1a62b5a13d28d5b7634dd7693b1d5994eb404c4bb4a9a80aa540d3984d170220307251107ff8499a23e99abce7dda4f1c707c98abddb9405a83de0081cde8ace",
7638 "020000000001012c32e55722e4b96324d8e5b398d583a20780b25202816adc32dc3157dee731c90300000000010000000176050000000000002200204adb4e2f00643db396dd120d4e7dc17625f5f2c11a40d857accc862d6b7dd80e05004730440220687af8544d335376620a6f4b5412bfd0da48de047c1785674f26e669d4a3ff82022058591c1e3a6c50017427d38a8f756eb685bdab88ec73838eed3530048861f9d5834730440220109f1a62b5a13d28d5b7634dd7693b1d5994eb404c4bb4a9a80aa540d3984d170220307251107ff8499a23e99abce7dda4f1c707c98abddb9405a83de0081cde8ace012004040404040404040404040404040404040404040404040404040404040404048d76a91414011f7254d96b819c76986c277d115efce6f7b58763ac67210394854aa6eab5b2a8122cc726e9dded053a2184d88256816826d6231c068d4a5b7c8201208763a91418bc1a114ccf9c052d3d23e28d3b0a9d1227434288527c21030d417a46946384f88d5f3337267c5e579765875dc4daca813e21734b140639e752ae677502f801b175ac6851b2756800000000" }
7641 // commitment tx with three outputs untrimmed (minimum feerate)
7642 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
7643 chan.feerate_per_kw = 3703;
7645 test_commitment!("3045022100b495d239772a237ff2cf354b1b11be152fd852704cb184e7356d13f2fb1e5e430220723db5cdb9cbd6ead7bfd3deb419cf41053a932418cbb22a67b581f40bc1f13e",
7646 "304402201b736d1773a124c745586217a75bed5f66c05716fbe8c7db4fdb3c3069741cdd02205083f39c321c1bcadfc8d97e3c791a66273d936abac0c6a2fde2ed46019508e1",
7647 "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", {
7650 "3045022100c34c61735f93f2e324cc873c3b248111ccf8f6db15d5969583757010d4ad2b4602207867bb919b2ddd6387873e425345c9b7fd18d1d66aba41f3607bc2896ef3c30a",
7651 "3045022100988c143e2110067117d2321bdd4bd16ca1734c98b29290d129384af0962b634e02206c1b02478878c5f547018b833986578f90c3e9be669fe5788ad0072a55acbb05",
7652 "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" }
7655 // anchors: commitment tx with three outputs untrimmed (minimum feerate)
7656 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
7657 chan.feerate_per_kw = 3687;
7659 test_commitment_with_anchors!("3045022100ad6c71569856b2d7ff42e838b4abe74a713426b37f22fa667a195a4c88908c6902202b37272b02a42dc6d9f4f82cab3eaf84ac882d9ed762859e1e75455c2c228377",
7660 "3045022100c970799bcb33f43179eb43b3378a0a61991cf2923f69b36ef12548c3df0e6d500220413dc27d2e39ee583093adfcb7799be680141738babb31cc7b0669a777a31f5d",
7661 "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", {
7664 "3045022100b287bb8e079a62dcb3aaa8b6c67c0f434a87ebf64ab0bcfb2fc14b55576b859f02206d37c2eb5fd04cfc9eb0534c76a28a98da251b84a931377cce307af39dfaed74",
7665 "3045022100a497c64faea286ec4221f48628086dc6403fd7b60a23c4176e8ebbca15ae70dc0220754e20e968e96cf6421fd2a672c8c26d3bc6e19218cfc8fc2aa51fce026c14b1",
7666 "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" }
7669 // commitment tx with three outputs untrimmed (maximum feerate)
7670 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
7671 chan.feerate_per_kw = 4914;
7673 test_commitment!("3045022100b4b16d5f8cc9fc4c1aff48831e832a0d8990e133978a66e302c133550954a44d022073573ce127e2200d316f6b612803a5c0c97b8d20e1e44dbe2ac0dd2fb8c95244",
7674 "3045022100d72638bc6308b88bb6d45861aae83e5b9ff6e10986546e13bce769c70036e2620220320be7c6d66d22f30b9fcd52af66531505b1310ca3b848c19285b38d8a1a8c19",
7675 "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", {
7678 "3045022100f43591c156038ba217756006bb3c55f7d113a325cdd7d9303c82115372858d68022016355b5aadf222bc8d12e426c75f4a03423917b2443a103eb2a498a3a2234374",
7679 "30440220585dee80fafa264beac535c3c0bb5838ac348b156fdc982f86adc08dfc9bfd250220130abb82f9f295cc9ef423dcfef772fde2acd85d9df48cc538981d26a10a9c10",
7680 "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" }
7683 // anchors: commitment tx with three outputs untrimmed (maximum feerate)
7684 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
7685 chan.feerate_per_kw = 4893;
7687 test_commitment_with_anchors!("3045022100a8771147109e4d3f44a5976c3c3de98732bbb77308d21444dbe0d76faf06480e02200b4e916e850c3d1f918de87bbbbb07843ffea1d4658dfe060b6f9ccd96d34be8",
7688 "30440220086288faceab47461eb2d808e9e9b0cb3ffc24a03c2f18db7198247d38f10e58022031d1c2782a58c8c6ce187d0019eb47a83babdf3040e2caff299ab48f7e12b1fa",
7689 "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", {
7692 "30450221008db80f8531104820b3e894492b4463f074f965b542e1b5c153ddfb108a5ea642022030b203d857a2b3581c2087a7bf17c95d04fadc1c6cdae88c620477f2dccb1ee4",
7693 "3045022100e5fbae857c47dbfc050a05924bd449fc9804798bd6442002c578437dc34450810220296589bc387645512345299e307116aaac4ce9fc752abcd1936b802d03526312",
7694 "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" }
7697 // commitment tx with two outputs untrimmed (minimum feerate)
7698 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
7699 chan.feerate_per_kw = 4915;
7701 test_commitment!("304402203a286936e74870ca1459c700c71202af0381910a6bfab687ef494ef1bc3e02c902202506c362d0e3bee15e802aa729bf378e051644648253513f1c085b264cc2a720",
7702 "30450221008a953551f4d67cb4df3037207fc082ddaf6be84d417b0bd14c80aab66f1b01a402207508796dc75034b2dee876fe01dc05a08b019f3e5d689ac8842ade2f1befccf5",
7703 "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", {});
7705 // anchors: commitment tx with two outputs untrimmed (minimum feerate)
7706 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
7707 chan.feerate_per_kw = 4894;
7709 test_commitment_with_anchors!("3045022100e784a66b1588575801e237d35e510fd92a81ae3a4a2a1b90c031ad803d07b3f3022021bc5f16501f167607d63b681442da193eb0a76b4b7fd25c2ed4f8b28fd35b95",
7710 "30450221009f16ac85d232e4eddb3fcd750a68ebf0b58e3356eaada45d3513ede7e817bf4c02207c2b043b4e5f971261975406cb955219fa56bffe5d834a833694b5abc1ce4cfd",
7711 "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", {});
7713 // commitment tx with two outputs untrimmed (maximum feerate)
7714 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
7715 chan.feerate_per_kw = 9651180;
7717 test_commitment!("304402200a8544eba1d216f5c5e530597665fa9bec56943c0f66d98fc3d028df52d84f7002201e45fa5c6bc3a506cc2553e7d1c0043a9811313fc39c954692c0d47cfce2bbd3",
7718 "3045022100e11b638c05c650c2f63a421d36ef8756c5ce82f2184278643520311cdf50aa200220259565fb9c8e4a87ccaf17f27a3b9ca4f20625754a0920d9c6c239d8156a11de",
7719 "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", {});
7721 // commitment tx with one output untrimmed (minimum feerate)
7722 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
7723 chan.feerate_per_kw = 9651181;
7725 test_commitment!("304402202ade0142008309eb376736575ad58d03e5b115499709c6db0b46e36ff394b492022037b63d78d66404d6504d4c4ac13be346f3d1802928a6d3ad95a6a944227161a2",
7726 "304402207e8d51e0c570a5868a78414f4e0cbfaed1106b171b9581542c30718ee4eb95ba02203af84194c97adf98898c9afe2f2ed4a7f8dba05a2dfab28ac9d9c604aa49a379",
7727 "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", {});
7729 // anchors: commitment tx with one output untrimmed (minimum feerate)
7730 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
7731 chan.feerate_per_kw = 6216010;
7733 test_commitment_with_anchors!("30450221008fd5dbff02e4b59020d4cd23a3c30d3e287065fda75a0a09b402980adf68ccda022001e0b8b620cd915ddff11f1de32addf23d81d51b90e6841b2cb8dcaf3faa5ecf",
7734 "30450221009ad80792e3038fe6968d12ff23e6888a565c3ddd065037f357445f01675d63f3022018384915e5f1f4ae157e15debf4f49b61c8d9d2b073c7d6f97c4a68caa3ed4c1",
7735 "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", {});
7737 // commitment tx with fee greater than funder amount
7738 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
7739 chan.feerate_per_kw = 9651936;
7741 test_commitment!("304402202ade0142008309eb376736575ad58d03e5b115499709c6db0b46e36ff394b492022037b63d78d66404d6504d4c4ac13be346f3d1802928a6d3ad95a6a944227161a2",
7742 "304402207e8d51e0c570a5868a78414f4e0cbfaed1106b171b9581542c30718ee4eb95ba02203af84194c97adf98898c9afe2f2ed4a7f8dba05a2dfab28ac9d9c604aa49a379",
7743 "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", {});
7745 // commitment tx with 3 htlc outputs, 2 offered having the same amount and preimage
7746 chan.value_to_self_msat = 7_000_000_000 - 2_000_000;
7747 chan.feerate_per_kw = 253;
7748 chan.pending_inbound_htlcs.clear();
7749 chan.pending_inbound_htlcs.push({
7750 let mut out = InboundHTLCOutput{
7752 amount_msat: 2000000,
7754 payment_hash: PaymentHash([0; 32]),
7755 state: InboundHTLCState::Committed,
7757 out.payment_hash.0 = Sha256::hash(&hex::decode("0101010101010101010101010101010101010101010101010101010101010101").unwrap()).into_inner();
7760 chan.pending_outbound_htlcs.clear();
7761 chan.pending_outbound_htlcs.push({
7762 let mut out = OutboundHTLCOutput{
7764 amount_msat: 5000000,
7766 payment_hash: PaymentHash([0; 32]),
7767 state: OutboundHTLCState::Committed,
7768 source: HTLCSource::dummy(),
7770 out.payment_hash.0 = Sha256::hash(&hex::decode("0505050505050505050505050505050505050505050505050505050505050505").unwrap()).into_inner();
7773 chan.pending_outbound_htlcs.push({
7774 let mut out = OutboundHTLCOutput{
7776 amount_msat: 5000000,
7778 payment_hash: PaymentHash([0; 32]),
7779 state: OutboundHTLCState::Committed,
7780 source: HTLCSource::dummy(),
7782 out.payment_hash.0 = Sha256::hash(&hex::decode("0505050505050505050505050505050505050505050505050505050505050505").unwrap()).into_inner();
7786 test_commitment!("30440220048705bec5288d28b3f29344b8d124853b1af423a568664d2c6f02c8ea886525022060f998a461052a2476b912db426ea2a06700953a241135c7957f2e79bc222df9",
7787 "3045022100c4f1d60b6fca9febc8b39de1a31e84c5f7c4b41c97239ef05f4350aa484c6b5e02200c5134ac8b20eb7a29d0dd4a501f6aa8fefb8489171f4cb408bd2a32324ab03f",
7788 "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", {
7791 "304502210081cbb94121761d34c189cd4e6a281feea6f585060ad0ba2632e8d6b3c6bb8a6c02201007981bbd16539d63df2805b5568f1f5688cd2a885d04706f50db9b77ba13c6",
7792 "304502210090ed76aeb21b53236a598968abc66e2024691d07b62f53ddbeca8f93144af9c602205f873af5a0c10e62690e9aba09740550f194a9dc455ba4c1c23f6cde7704674c",
7793 "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" },
7795 "304402201d0f09d2bf7bc245a4f17980e1e9164290df16c70c6a2ff1592f5030d6108581022061e744a7dc151b36bf0aff7a4f1812ba90b8b03633bb979a270d19858fd960c5",
7796 "30450221009aef000d2e843a4202c1b1a2bf554abc9a7902bf49b2cb0759bc507456b7ebad02204e7c3d193ede2fd2b4cd6b39f51a920e581e35575e357e44d7b699c40ce61d39",
7797 "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" },
7799 "30440220010bf035d5823596e50dce2076a4d9f942d8d28031c9c428b901a02b6b8140de02203250e8e4a08bc5b4ecdca4d0eedf98223e02e3ac1c0206b3a7ffdb374aa21e5f",
7800 "30440220073de0067b88e425b3018b30366bfeda0ccb703118ccd3d02ead08c0f53511d002203fac50ac0e4cf8a3af0b4b1b12e801650591f748f8ddf1e089c160f10b69e511",
7801 "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" }
7804 test_commitment_with_anchors!("3045022100c592f6b80d35b4f5d1e3bc9788f51141a0065be6013bad53a1977f7c444651660220278ac06ead9016bfb8dc476f186eabace2b02793b2f308442f5b0d5f24a68948",
7805 "3045022100c37ac4fc8538677631230c4b286f36b6f54c51fb4b34ef0bd0ba219ba47452630220278e09a745454ea380f3694392ed113762c68dd209b48360f547541088be9e45",
7806 "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", {
7809 "304402202060a5acb12105e92f27d7b86e6caf1e003d9d82068338e5a8a9a0d14cba11260220030ca4dba8fad24a2e395906220c991eccd5369bc4b0f216d217b5f86d1fc61d",
7810 "3044022044f5425fe630fa614f349f55642e4a0b76e2583054b21543821660d9e8f3735702207f70424835b541874ca8bf0443cca4028afa2f6c03a17b0688df85d5c44eeefc",
7811 "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" },
7813 "304402206fde7eb6d7a47fdc63705d3db2169054e229f10342dea66f150b163381f48a0802201be28509c2de9be4b7ab72c569c6fd51c0ce0904fea459142f31d442cd043eb8",
7814 "3045022100ad0236a78dbd029d3a8f583f7f82ee62892273d45303d00ef5a03fecf8903a36022004b2db33f8ff2f4a08ca6127c9cbfd9144c691a2feb9287e36ae6bc7c83c5a5f",
7815 "02000000000101aa443fb63abc1e8c754f98a7b96c27cb02b21d891d1242a16b630dc32c2afe2903000000000100000001e0120000000000002200204adb4e2f00643db396dd120d4e7dc17625f5f2c11a40d857accc862d6b7dd80e050047304402206fde7eb6d7a47fdc63705d3db2169054e229f10342dea66f150b163381f48a0802201be28509c2de9be4b7ab72c569c6fd51c0ce0904fea459142f31d442cd043eb883483045022100ad0236a78dbd029d3a8f583f7f82ee62892273d45303d00ef5a03fecf8903a36022004b2db33f8ff2f4a08ca6127c9cbfd9144c691a2feb9287e36ae6bc7c83c5a5f01008876a91414011f7254d96b819c76986c277d115efce6f7b58763ac67210394854aa6eab5b2a8122cc726e9dded053a2184d88256816826d6231c068d4a5b7c820120876475527c21030d417a46946384f88d5f3337267c5e579765875dc4daca813e21734b140639e752ae67a9142002cc93ebefbb1b73f0af055dcc27a0b504ad7688ac6851b27568f9010000" },
7817 "304402205eebc78d8ae6a36c27ef80172359eb757fb18e99fa75b28c37ffe3444b967bc7022060a01c33398d4d8244c42c762fb699e9f61c1f034ff976df2c94350c5a6032a7",
7818 "3045022100ad3fd523594e1b876316401774a30ee6c48bb7fa0efd768bf9a2d022201311ff02207bed627ed8e01041137f03dbaf03c836970be27a4d50f69d90cf1282ff2815e3",
7819 "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" }
7824 fn test_per_commitment_secret_gen() {
7825 // Test vectors from BOLT 3 Appendix D:
7827 let mut seed = [0; 32];
7828 seed[0..32].clone_from_slice(&hex::decode("0000000000000000000000000000000000000000000000000000000000000000").unwrap());
7829 assert_eq!(chan_utils::build_commitment_secret(&seed, 281474976710655),
7830 hex::decode("02a40c85b6f28da08dfdbe0926c53fab2de6d28c10301f8f7c4073d5e42e3148").unwrap()[..]);
7832 seed[0..32].clone_from_slice(&hex::decode("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF").unwrap());
7833 assert_eq!(chan_utils::build_commitment_secret(&seed, 281474976710655),
7834 hex::decode("7cc854b54e3e0dcdb010d7a3fee464a9687be6e8db3be6854c475621e007a5dc").unwrap()[..]);
7836 assert_eq!(chan_utils::build_commitment_secret(&seed, 0xaaaaaaaaaaa),
7837 hex::decode("56f4008fb007ca9acf0e15b054d5c9fd12ee06cea347914ddbaed70d1c13a528").unwrap()[..]);
7839 assert_eq!(chan_utils::build_commitment_secret(&seed, 0x555555555555),
7840 hex::decode("9015daaeb06dba4ccc05b91b2f73bd54405f2be9f217fbacd3c5ac2e62327d31").unwrap()[..]);
7842 seed[0..32].clone_from_slice(&hex::decode("0101010101010101010101010101010101010101010101010101010101010101").unwrap());
7843 assert_eq!(chan_utils::build_commitment_secret(&seed, 1),
7844 hex::decode("915c75942a26bb3a433a8ce2cb0427c29ec6c1775cfc78328b57f6ba7bfeaa9c").unwrap()[..]);
7848 fn test_key_derivation() {
7849 // Test vectors from BOLT 3 Appendix E:
7850 let secp_ctx = Secp256k1::new();
7852 let base_secret = SecretKey::from_slice(&hex::decode("000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f").unwrap()[..]).unwrap();
7853 let per_commitment_secret = SecretKey::from_slice(&hex::decode("1f1e1d1c1b1a191817161514131211100f0e0d0c0b0a09080706050403020100").unwrap()[..]).unwrap();
7855 let base_point = PublicKey::from_secret_key(&secp_ctx, &base_secret);
7856 assert_eq!(base_point.serialize()[..], hex::decode("036d6caac248af96f6afa7f904f550253a0f3ef3f5aa2fe6838a95b216691468e2").unwrap()[..]);
7858 let per_commitment_point = PublicKey::from_secret_key(&secp_ctx, &per_commitment_secret);
7859 assert_eq!(per_commitment_point.serialize()[..], hex::decode("025f7117a78150fe2ef97db7cfc83bd57b2e2c0d0dd25eaf467a4a1c2a45ce1486").unwrap()[..]);
7861 assert_eq!(chan_utils::derive_public_key(&secp_ctx, &per_commitment_point, &base_point).unwrap().serialize()[..],
7862 hex::decode("0235f2dbfaa89b57ec7b055afe29849ef7ddfeb1cefdb9ebdc43f5494984db29e5").unwrap()[..]);
7864 assert_eq!(chan_utils::derive_private_key(&secp_ctx, &per_commitment_point, &base_secret).unwrap(),
7865 SecretKey::from_slice(&hex::decode("cbced912d3b21bf196a766651e436aff192362621ce317704ea2f75d87e7be0f").unwrap()[..]).unwrap());
7867 assert_eq!(chan_utils::derive_public_revocation_key(&secp_ctx, &per_commitment_point, &base_point).unwrap().serialize()[..],
7868 hex::decode("02916e326636d19c33f13e8c0c3a03dd157f332f3e99c317c141dd865eb01f8ff0").unwrap()[..]);
7870 assert_eq!(chan_utils::derive_private_revocation_key(&secp_ctx, &per_commitment_secret, &base_secret).unwrap(),
7871 SecretKey::from_slice(&hex::decode("d09ffff62ddb2297ab000cc85bcb4283fdeb6aa052affbc9dddcf33b61078110").unwrap()[..]).unwrap());
7875 fn test_zero_conf_channel_type_support() {
7876 let feeest = TestFeeEstimator{fee_est: 15000};
7877 let secp_ctx = Secp256k1::new();
7878 let seed = [42; 32];
7879 let network = Network::Testnet;
7880 let keys_provider = test_utils::TestKeysInterface::new(&seed, network);
7881 let logger = test_utils::TestLogger::new();
7883 let node_b_node_id = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[42; 32]).unwrap());
7884 let config = UserConfig::default();
7885 let node_a_chan = Channel::<EnforcingSigner>::new_outbound(&&feeest, &&keys_provider,
7886 node_b_node_id, &InitFeatures::known(), 10000000, 100000, 42, &config, 0, 42).unwrap();
7888 let mut channel_type_features = ChannelTypeFeatures::only_static_remote_key();
7889 channel_type_features.set_zero_conf_required();
7891 let mut open_channel_msg = node_a_chan.get_open_channel(genesis_block(network).header.block_hash());
7892 open_channel_msg.channel_type = Some(channel_type_features);
7893 let node_b_node_id = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[7; 32]).unwrap());
7894 let res = Channel::<EnforcingSigner>::new_from_req(&&feeest, &&keys_provider,
7895 node_b_node_id, &InitFeatures::known(), &open_channel_msg, 7, &config, 0, &&logger, 42);
7896 assert!(res.is_ok());