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::block::BlockHeader;
11 use bitcoin::blockdata::script::{Script,Builder};
12 use bitcoin::blockdata::transaction::{TxIn, TxOut, Transaction, SigHashType};
13 use bitcoin::blockdata::opcodes;
14 use bitcoin::util::bip143;
15 use bitcoin::consensus::encode;
17 use bitcoin::hashes::Hash;
18 use bitcoin::hashes::sha256::Hash as Sha256;
19 use bitcoin::hash_types::{Txid, BlockHash, WPubkeyHash};
21 use bitcoin::secp256k1::key::{PublicKey,SecretKey};
22 use bitcoin::secp256k1::{Secp256k1,Signature};
23 use bitcoin::secp256k1;
25 use ln::features::{ChannelFeatures, InitFeatures};
27 use ln::msgs::{DecodeError, OptionalField, DataLossProtect};
28 use ln::channelmanager::{PendingHTLCStatus, HTLCSource, HTLCFailReason, HTLCFailureMsg, PendingHTLCInfo, RAACommitmentOrder, PaymentPreimage, PaymentHash, BREAKDOWN_TIMEOUT, MIN_CLTV_EXPIRY_DELTA, MAX_LOCAL_BREAKDOWN_TIMEOUT};
29 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};
31 use chain::chaininterface::{FeeEstimator,ConfirmationTarget};
32 use chain::channelmonitor::{ChannelMonitor, ChannelMonitorUpdate, ChannelMonitorUpdateStep, HTLC_FAIL_BACK_BUFFER};
33 use chain::transaction::{OutPoint, TransactionData};
34 use chain::keysinterface::{Sign, KeysInterface};
35 use util::transaction_utils;
36 use util::ser::{Readable, ReadableArgs, Writeable, Writer, VecWriter};
37 use util::logger::Logger;
38 use util::errors::APIError;
39 use util::config::{UserConfig,ChannelConfig};
40 use util::scid_utils::scid_from_parts;
43 use std::{cmp,mem,fmt};
45 #[cfg(any(test, feature = "fuzztarget"))]
47 use bitcoin::hashes::hex::ToHex;
48 use bitcoin::blockdata::opcodes::all::OP_PUSHBYTES_0;
51 pub struct ChannelValueStat {
52 pub value_to_self_msat: u64,
53 pub channel_value_msat: u64,
54 pub channel_reserve_msat: u64,
55 pub pending_outbound_htlcs_amount_msat: u64,
56 pub pending_inbound_htlcs_amount_msat: u64,
57 pub holding_cell_outbound_amount_msat: u64,
58 pub counterparty_max_htlc_value_in_flight_msat: u64, // outgoing
59 pub counterparty_dust_limit_msat: u64,
62 enum InboundHTLCRemovalReason {
63 FailRelay(msgs::OnionErrorPacket),
64 FailMalformed(([u8; 32], u16)),
65 Fulfill(PaymentPreimage),
68 enum InboundHTLCState {
69 /// Offered by remote, to be included in next local commitment tx. I.e., the remote sent an
70 /// update_add_htlc message for this HTLC.
71 RemoteAnnounced(PendingHTLCStatus),
72 /// Included in a received commitment_signed message (implying we've
73 /// revoke_and_ack'd it), but the remote hasn't yet revoked their previous
74 /// state (see the example below). We have not yet included this HTLC in a
75 /// commitment_signed message because we are waiting on the remote's
76 /// aforementioned state revocation. One reason this missing remote RAA
77 /// (revoke_and_ack) blocks us from constructing a commitment_signed message
78 /// is because every time we create a new "state", i.e. every time we sign a
79 /// new commitment tx (see [BOLT #2]), we need a new per_commitment_point,
80 /// which are provided one-at-a-time in each RAA. E.g., the last RAA they
81 /// sent provided the per_commitment_point for our current commitment tx.
82 /// The other reason we should not send a commitment_signed without their RAA
83 /// is because their RAA serves to ACK our previous commitment_signed.
85 /// Here's an example of how an HTLC could come to be in this state:
86 /// remote --> update_add_htlc(prev_htlc) --> local
87 /// remote --> commitment_signed(prev_htlc) --> local
88 /// remote <-- revoke_and_ack <-- local
89 /// remote <-- commitment_signed(prev_htlc) <-- local
90 /// [note that here, the remote does not respond with a RAA]
91 /// remote --> update_add_htlc(this_htlc) --> local
92 /// remote --> commitment_signed(prev_htlc, this_htlc) --> local
93 /// Now `this_htlc` will be assigned this state. It's unable to be officially
94 /// accepted, i.e. included in a commitment_signed, because we're missing the
95 /// RAA that provides our next per_commitment_point. The per_commitment_point
96 /// is used to derive commitment keys, which are used to construct the
97 /// signatures in a commitment_signed message.
98 /// Implies AwaitingRemoteRevoke.
100 /// [BOLT #2]: https://github.com/lightningnetwork/lightning-rfc/blob/master/02-peer-protocol.md
101 AwaitingRemoteRevokeToAnnounce(PendingHTLCStatus),
102 /// Included in a received commitment_signed message (implying we've revoke_and_ack'd it).
103 /// We have also included this HTLC in our latest commitment_signed and are now just waiting
104 /// on the remote's revoke_and_ack to make this HTLC an irrevocable part of the state of the
105 /// channel (before it can then get forwarded and/or removed).
106 /// Implies AwaitingRemoteRevoke.
107 AwaitingAnnouncedRemoteRevoke(PendingHTLCStatus),
109 /// Removed by us and a new commitment_signed was sent (if we were AwaitingRemoteRevoke when we
110 /// created it we would have put it in the holding cell instead). When they next revoke_and_ack
112 /// Note that we have to keep an eye on the HTLC until we've received a broadcastable
113 /// commitment transaction without it as otherwise we'll have to force-close the channel to
114 /// claim it before the timeout (obviously doesn't apply to revoked HTLCs that we can't claim
115 /// anyway). That said, ChannelMonitor does this for us (see
116 /// ChannelMonitor::would_broadcast_at_height) so we actually remove the HTLC from our own
117 /// local state before then, once we're sure that the next commitment_signed and
118 /// ChannelMonitor::provide_latest_local_commitment_tx will not include this HTLC.
119 LocalRemoved(InboundHTLCRemovalReason),
122 struct InboundHTLCOutput {
126 payment_hash: PaymentHash,
127 state: InboundHTLCState,
130 enum OutboundHTLCState {
131 /// Added by us and included in a commitment_signed (if we were AwaitingRemoteRevoke when we
132 /// created it we would have put it in the holding cell instead). When they next revoke_and_ack
133 /// we will promote to Committed (note that they may not accept it until the next time we
134 /// revoke, but we don't really care about that:
135 /// * they've revoked, so worst case we can announce an old state and get our (option on)
136 /// money back (though we won't), and,
137 /// * we'll send them a revoke when they send a commitment_signed, and since only they're
138 /// allowed to remove it, the "can only be removed once committed on both sides" requirement
139 /// doesn't matter to us and it's up to them to enforce it, worst-case they jump ahead but
140 /// we'll never get out of sync).
141 /// Note that we Box the OnionPacket as it's rather large and we don't want to blow up
142 /// OutboundHTLCOutput's size just for a temporary bit
143 LocalAnnounced(Box<msgs::OnionPacket>),
145 /// Remote removed this (outbound) HTLC. We're waiting on their commitment_signed to finalize
146 /// the change (though they'll need to revoke before we fail the payment).
147 RemoteRemoved(Option<HTLCFailReason>),
148 /// Remote removed this and sent a commitment_signed (implying we've revoke_and_ack'ed it), but
149 /// the remote side hasn't yet revoked their previous state, which we need them to do before we
150 /// can do any backwards failing. Implies AwaitingRemoteRevoke.
151 /// We also have not yet removed this HTLC in a commitment_signed message, and are waiting on a
152 /// remote revoke_and_ack on a previous state before we can do so.
153 AwaitingRemoteRevokeToRemove(Option<HTLCFailReason>),
154 /// Remote removed this and sent a commitment_signed (implying we've revoke_and_ack'ed it), but
155 /// the remote side hasn't yet revoked their previous state, which we need them to do before we
156 /// can do any backwards failing. Implies AwaitingRemoteRevoke.
157 /// We have removed this HTLC in our latest commitment_signed and are now just waiting on a
158 /// revoke_and_ack to drop completely.
159 AwaitingRemovedRemoteRevoke(Option<HTLCFailReason>),
162 struct OutboundHTLCOutput {
166 payment_hash: PaymentHash,
167 state: OutboundHTLCState,
171 /// See AwaitingRemoteRevoke ChannelState for more info
172 enum HTLCUpdateAwaitingACK {
173 AddHTLC { // TODO: Time out if we're getting close to cltv_expiry
177 payment_hash: PaymentHash,
179 onion_routing_packet: msgs::OnionPacket,
182 payment_preimage: PaymentPreimage,
187 err_packet: msgs::OnionErrorPacket,
191 /// There are a few "states" and then a number of flags which can be applied:
192 /// We first move through init with OurInitSent -> TheirInitSent -> FundingCreated -> FundingSent.
193 /// TheirFundingLocked and OurFundingLocked then get set on FundingSent, and when both are set we
194 /// move on to ChannelFunded.
195 /// Note that PeerDisconnected can be set on both ChannelFunded and FundingSent.
196 /// ChannelFunded can then get all remaining flags set on it, until we finish shutdown, then we
197 /// move on to ShutdownComplete, at which point most calls into this channel are disallowed.
199 /// Implies we have (or are prepared to) send our open_channel/accept_channel message
200 OurInitSent = 1 << 0,
201 /// Implies we have received their open_channel/accept_channel message
202 TheirInitSent = 1 << 1,
203 /// We have sent funding_created and are awaiting a funding_signed to advance to FundingSent.
204 /// Note that this is nonsense for an inbound channel as we immediately generate funding_signed
205 /// upon receipt of funding_created, so simply skip this state.
207 /// Set when we have received/sent funding_created and funding_signed and are thus now waiting
208 /// on the funding transaction to confirm. The FundingLocked flags are set to indicate when we
209 /// and our counterparty consider the funding transaction confirmed.
211 /// Flag which can be set on FundingSent to indicate they sent us a funding_locked message.
212 /// Once both TheirFundingLocked and OurFundingLocked are set, state moves on to ChannelFunded.
213 TheirFundingLocked = 1 << 4,
214 /// Flag which can be set on FundingSent to indicate we sent them a funding_locked message.
215 /// Once both TheirFundingLocked and OurFundingLocked are set, state moves on to ChannelFunded.
216 OurFundingLocked = 1 << 5,
218 /// Flag which is set on ChannelFunded and FundingSent indicating remote side is considered
219 /// "disconnected" and no updates are allowed until after we've done a channel_reestablish
221 PeerDisconnected = 1 << 7,
222 /// Flag which is set on ChannelFunded, FundingCreated, and FundingSent indicating the user has
223 /// told us they failed to update our ChannelMonitor somewhere and we should pause sending any
224 /// outbound messages until they've managed to do so.
225 MonitorUpdateFailed = 1 << 8,
226 /// Flag which implies that we have sent a commitment_signed but are awaiting the responding
227 /// revoke_and_ack message. During this time period, we can't generate new commitment_signed
228 /// messages as then we will be unable to determine which HTLCs they included in their
229 /// revoke_and_ack implicit ACK, so instead we have to hold them away temporarily to be sent
231 /// Flag is set on ChannelFunded.
232 AwaitingRemoteRevoke = 1 << 9,
233 /// Flag which is set on ChannelFunded or FundingSent after receiving a shutdown message from
234 /// the remote end. If set, they may not add any new HTLCs to the channel, and we are expected
235 /// to respond with our own shutdown message when possible.
236 RemoteShutdownSent = 1 << 10,
237 /// Flag which is set on ChannelFunded or FundingSent after sending a shutdown message. At this
238 /// point, we may not add any new HTLCs to the channel.
239 /// TODO: Investigate some kind of timeout mechanism by which point the remote end must provide
240 /// us their shutdown.
241 LocalShutdownSent = 1 << 11,
242 /// We've successfully negotiated a closing_signed dance. At this point ChannelManager is about
243 /// to drop us, but we store this anyway.
244 ShutdownComplete = 4096,
246 const BOTH_SIDES_SHUTDOWN_MASK: u32 = ChannelState::LocalShutdownSent as u32 | ChannelState::RemoteShutdownSent as u32;
247 const MULTI_STATE_FLAGS: u32 = BOTH_SIDES_SHUTDOWN_MASK | ChannelState::PeerDisconnected as u32 | ChannelState::MonitorUpdateFailed as u32;
249 pub const INITIAL_COMMITMENT_NUMBER: u64 = (1 << 48) - 1;
251 /// Liveness is called to fluctuate given peer disconnecton/monitor failures/closing.
252 /// If channel is public, network should have a liveness view announced by us on a
253 /// best-effort, which means we may filter out some status transitions to avoid spam.
254 /// See further timer_chan_freshness_every_min.
257 /// Status has been gossiped.
259 /// Status has been changed.
261 /// Status has been marked to be gossiped at next flush
265 /// An enum indicating whether the local or remote side offered a given HTLC.
271 /// Used when calculating whether we or the remote can afford an additional HTLC.
272 struct HTLCCandidate {
274 origin: HTLCInitiator,
278 fn new(amount_msat: u64, origin: HTLCInitiator) -> Self {
286 /// Information needed for constructing an invoice route hint for this channel.
288 pub struct CounterpartyForwardingInfo {
289 /// Base routing fee in millisatoshis.
290 pub fee_base_msat: u32,
291 /// Amount in millionths of a satoshi the channel will charge per transferred satoshi.
292 pub fee_proportional_millionths: u32,
293 /// The minimum difference in cltv_expiry between an ingoing HTLC and its outgoing counterpart,
294 /// such that the outgoing HTLC is forwardable to this counterparty. See `msgs::ChannelUpdate`'s
295 /// `cltv_expiry_delta` for more details.
296 pub cltv_expiry_delta: u16,
299 // TODO: We should refactor this to be an Inbound/OutboundChannel until initial setup handshaking
300 // has been completed, and then turn into a Channel to get compiler-time enforcement of things like
301 // calling channel_id() before we're set up or things like get_outbound_funding_signed on an
304 // Holder designates channel data owned for the benefice of the user client.
305 // Counterparty designates channel data owned by the another channel participant entity.
306 pub(super) struct Channel<Signer: Sign> {
307 config: ChannelConfig,
311 channel_id: [u8; 32],
313 secp_ctx: Secp256k1<secp256k1::All>,
314 channel_value_satoshis: u64,
316 latest_monitor_update_id: u64,
318 holder_signer: Signer,
319 shutdown_pubkey: PublicKey,
320 destination_script: Script,
322 // Our commitment numbers start at 2^48-1 and count down, whereas the ones used in transaction
323 // generation start at 0 and count up...this simplifies some parts of implementation at the
324 // cost of others, but should really just be changed.
326 cur_holder_commitment_transaction_number: u64,
327 cur_counterparty_commitment_transaction_number: u64,
328 value_to_self_msat: u64, // Excluding all pending_htlcs, excluding fees
329 pending_inbound_htlcs: Vec<InboundHTLCOutput>,
330 pending_outbound_htlcs: Vec<OutboundHTLCOutput>,
331 holding_cell_htlc_updates: Vec<HTLCUpdateAwaitingACK>,
333 /// When resending CS/RAA messages on channel monitor restoration or on reconnect, we always
334 /// need to ensure we resend them in the order we originally generated them. Note that because
335 /// there can only ever be one in-flight CS and/or one in-flight RAA at any time, it is
336 /// sufficient to simply set this to the opposite of any message we are generating as we
337 /// generate it. ie when we generate a CS, we set this to RAAFirst as, if there is a pending
338 /// in-flight RAA to resend, it will have been the first thing we generated, and thus we should
340 resend_order: RAACommitmentOrder,
342 monitor_pending_funding_locked: bool,
343 monitor_pending_revoke_and_ack: bool,
344 monitor_pending_commitment_signed: bool,
345 monitor_pending_forwards: Vec<(PendingHTLCInfo, u64)>,
346 monitor_pending_failures: Vec<(HTLCSource, PaymentHash, HTLCFailReason)>,
348 // pending_update_fee is filled when sending and receiving update_fee
349 // For outbound channel, feerate_per_kw is updated with the value from
350 // pending_update_fee when revoke_and_ack is received
352 // For inbound channel, feerate_per_kw is updated when it receives
353 // commitment_signed and revoke_and_ack is generated
354 // The pending value is kept when another pair of update_fee and commitment_signed
355 // is received during AwaitingRemoteRevoke and relieved when the expected
356 // revoke_and_ack is received and new commitment_signed is generated to be
357 // sent to the funder. Otherwise, the pending value is removed when receiving
358 // commitment_signed.
359 pending_update_fee: Option<u32>,
360 // update_fee() during ChannelState::AwaitingRemoteRevoke is hold in
361 // holdina_cell_update_fee then moved to pending_udpate_fee when revoke_and_ack
362 // is received. holding_cell_update_fee is updated when there are additional
363 // update_fee() during ChannelState::AwaitingRemoteRevoke.
364 holding_cell_update_fee: Option<u32>,
365 next_holder_htlc_id: u64,
366 next_counterparty_htlc_id: u64,
367 update_time_counter: u32,
370 #[cfg(debug_assertions)]
371 /// Max to_local and to_remote outputs in a locally-generated commitment transaction
372 holder_max_commitment_tx_output: ::std::sync::Mutex<(u64, u64)>,
373 #[cfg(debug_assertions)]
374 /// Max to_local and to_remote outputs in a remote-generated commitment transaction
375 counterparty_max_commitment_tx_output: ::std::sync::Mutex<(u64, u64)>,
377 last_sent_closing_fee: Option<(u32, u64, Signature)>, // (feerate, fee, holder_sig)
379 /// The hash of the block in which the funding transaction reached our CONF_TARGET. We use this
380 /// to detect unconfirmation after a serialize-unserialize roundtrip where we may not see a full
381 /// series of block_connected/block_disconnected calls. Obviously this is not a guarantee as we
382 /// could miss the funding_tx_confirmed_in block as well, but it serves as a useful fallback.
383 funding_tx_confirmed_in: Option<BlockHash>,
384 short_channel_id: Option<u64>,
385 funding_tx_confirmations: u64,
387 counterparty_dust_limit_satoshis: u64,
389 pub(super) holder_dust_limit_satoshis: u64,
391 holder_dust_limit_satoshis: u64,
393 pub(super) counterparty_max_htlc_value_in_flight_msat: u64,
395 counterparty_max_htlc_value_in_flight_msat: u64,
396 //get_holder_max_htlc_value_in_flight_msat(): u64,
397 /// minimum channel reserve for self to maintain - set by them.
398 counterparty_selected_channel_reserve_satoshis: u64,
399 // get_holder_selected_channel_reserve_satoshis(channel_value_sats: u64): u64
400 counterparty_htlc_minimum_msat: u64,
401 holder_htlc_minimum_msat: u64,
403 pub counterparty_max_accepted_htlcs: u16,
405 counterparty_max_accepted_htlcs: u16,
406 //implied by OUR_MAX_HTLCS: max_accepted_htlcs: u16,
409 counterparty_forwarding_info: Option<CounterpartyForwardingInfo>,
411 pub(crate) channel_transaction_parameters: ChannelTransactionParameters,
412 funding_transaction: Option<Transaction>,
414 counterparty_cur_commitment_point: Option<PublicKey>,
415 counterparty_prev_commitment_point: Option<PublicKey>,
416 counterparty_node_id: PublicKey,
418 counterparty_shutdown_scriptpubkey: Option<Script>,
420 commitment_secrets: CounterpartyCommitmentSecrets,
422 network_sync: UpdateStatus,
424 // We save these values so we can make sure `next_local_commit_tx_fee_msat` and
425 // `next_remote_commit_tx_fee_msat` properly predict what the next commitment transaction fee will
426 // be, by comparing the cached values to the fee of the tranaction generated by
427 // `build_commitment_transaction`.
428 #[cfg(any(test, feature = "fuzztarget"))]
429 next_local_commitment_tx_fee_info_cached: Mutex<Option<CommitmentTxInfoCached>>,
430 #[cfg(any(test, feature = "fuzztarget"))]
431 next_remote_commitment_tx_fee_info_cached: Mutex<Option<CommitmentTxInfoCached>>,
434 #[cfg(any(test, feature = "fuzztarget"))]
435 struct CommitmentTxInfoCached {
437 total_pending_htlcs: usize,
438 next_holder_htlc_id: u64,
439 next_counterparty_htlc_id: u64,
443 pub const OUR_MAX_HTLCS: u16 = 50; //TODO
444 /// Confirmation count threshold at which we close a channel. Ideally we'd keep the channel around
445 /// on ice until the funding transaction gets more confirmations, but the LN protocol doesn't
446 /// really allow for this, so instead we're stuck closing it out at that point.
447 const UNCONF_THRESHOLD: u32 = 6;
448 const SPENDING_INPUT_FOR_A_OUTPUT_WEIGHT: u64 = 79; // prevout: 36, nSequence: 4, script len: 1, witness lengths: (3+1)/4, sig: 73/4, if-selector: 1, redeemScript: (6 ops + 2*33 pubkeys + 1*2 delay)/4
449 const B_OUTPUT_PLUS_SPENDING_INPUT_WEIGHT: u64 = 104; // prevout: 40, nSequence: 4, script len: 1, witness lengths: 3/4, sig: 73/4, pubkey: 33/4, output: 31 (TODO: Wrong? Useless?)
452 const COMMITMENT_TX_BASE_WEIGHT: u64 = 724;
454 pub const COMMITMENT_TX_BASE_WEIGHT: u64 = 724;
456 const COMMITMENT_TX_WEIGHT_PER_HTLC: u64 = 172;
458 pub const COMMITMENT_TX_WEIGHT_PER_HTLC: u64 = 172;
460 /// Maximmum `funding_satoshis` value, according to the BOLT #2 specification
462 pub const MAX_FUNDING_SATOSHIS: u64 = 1 << 24;
464 /// Used to return a simple Error back to ChannelManager. Will get converted to a
465 /// msgs::ErrorAction::SendErrorMessage or msgs::ErrorAction::IgnoreError as appropriate with our
466 /// channel_id in ChannelManager.
467 pub(super) enum ChannelError {
470 CloseDelayBroadcast(String),
473 impl fmt::Debug for ChannelError {
474 fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
476 &ChannelError::Ignore(ref e) => write!(f, "Ignore : {}", e),
477 &ChannelError::Close(ref e) => write!(f, "Close : {}", e),
478 &ChannelError::CloseDelayBroadcast(ref e) => write!(f, "CloseDelayBroadcast : {}", e)
483 macro_rules! secp_check {
484 ($res: expr, $err: expr) => {
487 Err(_) => return Err(ChannelError::Close($err)),
492 impl<Signer: Sign> Channel<Signer> {
493 // Convert constants + channel value to limits:
494 fn get_holder_max_htlc_value_in_flight_msat(channel_value_satoshis: u64) -> u64 {
495 channel_value_satoshis * 1000 / 10 //TODO
498 /// Returns a minimum channel reserve value the remote needs to maintain,
501 /// Guaranteed to return a value no larger than channel_value_satoshis
502 pub(crate) fn get_holder_selected_channel_reserve_satoshis(channel_value_satoshis: u64) -> u64 {
503 let (q, _) = channel_value_satoshis.overflowing_div(100);
504 cmp::min(channel_value_satoshis, cmp::max(q, 1000)) //TODO
507 fn derive_holder_dust_limit_satoshis(at_open_background_feerate: u32) -> u64 {
508 cmp::max(at_open_background_feerate as u64 * B_OUTPUT_PLUS_SPENDING_INPUT_WEIGHT / 1000, 546) //TODO
512 pub fn new_outbound<K: Deref, F: Deref>(fee_estimator: &F, keys_provider: &K, counterparty_node_id: PublicKey, channel_value_satoshis: u64, push_msat: u64, user_id: u64, config: &UserConfig) -> Result<Channel<Signer>, APIError>
513 where K::Target: KeysInterface<Signer = Signer>,
514 F::Target: FeeEstimator,
516 let holder_selected_contest_delay = config.own_channel_config.our_to_self_delay;
517 let holder_signer = keys_provider.get_channel_signer(false, channel_value_satoshis);
518 let pubkeys = holder_signer.pubkeys().clone();
520 if channel_value_satoshis >= MAX_FUNDING_SATOSHIS {
521 return Err(APIError::APIMisuseError{err: format!("funding_value must be smaller than {}, it was {}", MAX_FUNDING_SATOSHIS, channel_value_satoshis)});
523 let channel_value_msat = channel_value_satoshis * 1000;
524 if push_msat > channel_value_msat {
525 return Err(APIError::APIMisuseError { err: format!("Push value ({}) was larger than channel_value ({})", push_msat, channel_value_msat) });
527 if holder_selected_contest_delay < BREAKDOWN_TIMEOUT {
528 return Err(APIError::APIMisuseError {err: format!("Configured with an unreasonable our_to_self_delay ({}) putting user funds at risks", holder_selected_contest_delay)});
530 let background_feerate = fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Background);
531 if Channel::<Signer>::get_holder_selected_channel_reserve_satoshis(channel_value_satoshis) < Channel::<Signer>::derive_holder_dust_limit_satoshis(background_feerate) {
532 return Err(APIError::FeeRateTooHigh{err: format!("Not enough reserve above dust limit can be found at current fee rate({})", background_feerate), feerate: background_feerate});
535 let feerate = fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Normal);
537 let mut secp_ctx = Secp256k1::new();
538 secp_ctx.seeded_randomize(&keys_provider.get_secure_random_bytes());
542 config: config.channel_options.clone(),
544 channel_id: keys_provider.get_secure_random_bytes(),
545 channel_state: ChannelState::OurInitSent as u32,
547 channel_value_satoshis,
549 latest_monitor_update_id: 0,
552 shutdown_pubkey: keys_provider.get_shutdown_pubkey(),
553 destination_script: keys_provider.get_destination_script(),
555 cur_holder_commitment_transaction_number: INITIAL_COMMITMENT_NUMBER,
556 cur_counterparty_commitment_transaction_number: INITIAL_COMMITMENT_NUMBER,
557 value_to_self_msat: channel_value_satoshis * 1000 - push_msat,
559 pending_inbound_htlcs: Vec::new(),
560 pending_outbound_htlcs: Vec::new(),
561 holding_cell_htlc_updates: Vec::new(),
562 pending_update_fee: None,
563 holding_cell_update_fee: None,
564 next_holder_htlc_id: 0,
565 next_counterparty_htlc_id: 0,
566 update_time_counter: 1,
568 resend_order: RAACommitmentOrder::CommitmentFirst,
570 monitor_pending_funding_locked: false,
571 monitor_pending_revoke_and_ack: false,
572 monitor_pending_commitment_signed: false,
573 monitor_pending_forwards: Vec::new(),
574 monitor_pending_failures: Vec::new(),
576 #[cfg(debug_assertions)]
577 holder_max_commitment_tx_output: ::std::sync::Mutex::new((channel_value_satoshis * 1000 - push_msat, push_msat)),
578 #[cfg(debug_assertions)]
579 counterparty_max_commitment_tx_output: ::std::sync::Mutex::new((channel_value_satoshis * 1000 - push_msat, push_msat)),
581 last_sent_closing_fee: None,
583 funding_tx_confirmed_in: None,
584 short_channel_id: None,
585 funding_tx_confirmations: 0,
587 feerate_per_kw: feerate,
588 counterparty_dust_limit_satoshis: 0,
589 holder_dust_limit_satoshis: Channel::<Signer>::derive_holder_dust_limit_satoshis(background_feerate),
590 counterparty_max_htlc_value_in_flight_msat: 0,
591 counterparty_selected_channel_reserve_satoshis: 0,
592 counterparty_htlc_minimum_msat: 0,
593 holder_htlc_minimum_msat: if config.own_channel_config.our_htlc_minimum_msat == 0 { 1 } else { config.own_channel_config.our_htlc_minimum_msat },
594 counterparty_max_accepted_htlcs: 0,
595 minimum_depth: 0, // Filled in in accept_channel
597 counterparty_forwarding_info: None,
599 channel_transaction_parameters: ChannelTransactionParameters {
600 holder_pubkeys: pubkeys,
601 holder_selected_contest_delay: config.own_channel_config.our_to_self_delay,
602 is_outbound_from_holder: true,
603 counterparty_parameters: None,
604 funding_outpoint: None
606 funding_transaction: None,
608 counterparty_cur_commitment_point: None,
609 counterparty_prev_commitment_point: None,
610 counterparty_node_id,
612 counterparty_shutdown_scriptpubkey: None,
614 commitment_secrets: CounterpartyCommitmentSecrets::new(),
616 network_sync: UpdateStatus::Fresh,
618 #[cfg(any(test, feature = "fuzztarget"))]
619 next_local_commitment_tx_fee_info_cached: Mutex::new(None),
620 #[cfg(any(test, feature = "fuzztarget"))]
621 next_remote_commitment_tx_fee_info_cached: Mutex::new(None),
625 fn check_remote_fee<F: Deref>(fee_estimator: &F, feerate_per_kw: u32) -> Result<(), ChannelError>
626 where F::Target: FeeEstimator
628 let lower_limit = fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Background);
629 if feerate_per_kw < lower_limit {
630 return Err(ChannelError::Close(format!("Peer's feerate much too low. Actual: {}. Our expected lower limit: {}", feerate_per_kw, lower_limit)));
632 let upper_limit = fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::HighPriority) as u64 * 2;
633 if feerate_per_kw as u64 > upper_limit {
634 return Err(ChannelError::Close(format!("Peer's feerate much too high. Actual: {}. Our expected upper limit: {}", feerate_per_kw, upper_limit)));
639 /// Creates a new channel from a remote sides' request for one.
640 /// Assumes chain_hash has already been checked and corresponds with what we expect!
641 pub fn new_from_req<K: Deref, F: Deref>(fee_estimator: &F, keys_provider: &K, counterparty_node_id: PublicKey, their_features: InitFeatures, msg: &msgs::OpenChannel, user_id: u64, config: &UserConfig) -> Result<Channel<Signer>, ChannelError>
642 where K::Target: KeysInterface<Signer = Signer>,
643 F::Target: FeeEstimator
645 let holder_signer = keys_provider.get_channel_signer(true, msg.funding_satoshis);
646 let pubkeys = holder_signer.pubkeys().clone();
647 let counterparty_pubkeys = ChannelPublicKeys {
648 funding_pubkey: msg.funding_pubkey,
649 revocation_basepoint: msg.revocation_basepoint,
650 payment_point: msg.payment_point,
651 delayed_payment_basepoint: msg.delayed_payment_basepoint,
652 htlc_basepoint: msg.htlc_basepoint
654 let mut local_config = (*config).channel_options.clone();
656 if config.own_channel_config.our_to_self_delay < BREAKDOWN_TIMEOUT {
657 return Err(ChannelError::Close(format!("Configured with an unreasonable our_to_self_delay ({}) putting user funds at risks. It must be greater than {}", config.own_channel_config.our_to_self_delay, BREAKDOWN_TIMEOUT)));
660 // Check sanity of message fields:
661 if msg.funding_satoshis >= MAX_FUNDING_SATOSHIS {
662 return Err(ChannelError::Close(format!("Funding must be smaller than {}. It was {}", MAX_FUNDING_SATOSHIS, msg.funding_satoshis)));
664 if msg.channel_reserve_satoshis > msg.funding_satoshis {
665 return Err(ChannelError::Close(format!("Bogus channel_reserve_satoshis ({}). Must be not greater than funding_satoshis: {}", msg.channel_reserve_satoshis, msg.funding_satoshis)));
667 let funding_value = (msg.funding_satoshis - msg.channel_reserve_satoshis) * 1000;
668 if msg.push_msat > funding_value {
669 return Err(ChannelError::Close(format!("push_msat {} was larger than funding value {}", msg.push_msat, funding_value)));
671 if msg.dust_limit_satoshis > msg.funding_satoshis {
672 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)));
674 if msg.dust_limit_satoshis > msg.channel_reserve_satoshis {
675 return Err(ChannelError::Close(format!("Bogus; channel reserve ({}) is less than dust limit ({})", msg.channel_reserve_satoshis, msg.dust_limit_satoshis)));
677 let full_channel_value_msat = (msg.funding_satoshis - msg.channel_reserve_satoshis) * 1000;
678 if msg.htlc_minimum_msat >= full_channel_value_msat {
679 return Err(ChannelError::Close(format!("Minimum htlc value ({}) was larger than full channel value ({})", msg.htlc_minimum_msat, full_channel_value_msat)));
681 Channel::<Signer>::check_remote_fee(fee_estimator, msg.feerate_per_kw)?;
683 let max_counterparty_selected_contest_delay = u16::min(config.peer_channel_config_limits.their_to_self_delay, MAX_LOCAL_BREAKDOWN_TIMEOUT);
684 if msg.to_self_delay > max_counterparty_selected_contest_delay {
685 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)));
687 if msg.max_accepted_htlcs < 1 {
688 return Err(ChannelError::Close("0 max_accepted_htlcs makes for a useless channel".to_owned()));
690 if msg.max_accepted_htlcs > MAX_HTLCS {
691 return Err(ChannelError::Close(format!("max_accepted_htlcs was {}. It must not be larger than {}", msg.max_accepted_htlcs, MAX_HTLCS)));
694 // Now check against optional parameters as set by config...
695 if msg.funding_satoshis < config.peer_channel_config_limits.min_funding_satoshis {
696 return Err(ChannelError::Close(format!("Funding satoshis ({}) is less than the user specified limit ({})", msg.funding_satoshis, config.peer_channel_config_limits.min_funding_satoshis)));
698 if msg.htlc_minimum_msat > config.peer_channel_config_limits.max_htlc_minimum_msat {
699 return Err(ChannelError::Close(format!("htlc_minimum_msat ({}) is higher than the user specified limit ({})", msg.htlc_minimum_msat, config.peer_channel_config_limits.max_htlc_minimum_msat)));
701 if msg.max_htlc_value_in_flight_msat < config.peer_channel_config_limits.min_max_htlc_value_in_flight_msat {
702 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.peer_channel_config_limits.min_max_htlc_value_in_flight_msat)));
704 if msg.channel_reserve_satoshis > config.peer_channel_config_limits.max_channel_reserve_satoshis {
705 return Err(ChannelError::Close(format!("channel_reserve_satoshis ({}) is higher than the user specified limit ({})", msg.channel_reserve_satoshis, config.peer_channel_config_limits.max_channel_reserve_satoshis)));
707 if msg.max_accepted_htlcs < config.peer_channel_config_limits.min_max_accepted_htlcs {
708 return Err(ChannelError::Close(format!("max_accepted_htlcs ({}) is less than the user specified limit ({})", msg.max_accepted_htlcs, config.peer_channel_config_limits.min_max_accepted_htlcs)));
710 if msg.dust_limit_satoshis < config.peer_channel_config_limits.min_dust_limit_satoshis {
711 return Err(ChannelError::Close(format!("dust_limit_satoshis ({}) is less than the user specified limit ({})", msg.dust_limit_satoshis, config.peer_channel_config_limits.min_dust_limit_satoshis)));
713 if msg.dust_limit_satoshis > config.peer_channel_config_limits.max_dust_limit_satoshis {
714 return Err(ChannelError::Close(format!("dust_limit_satoshis ({}) is greater than the user specified limit ({})", msg.dust_limit_satoshis, config.peer_channel_config_limits.max_dust_limit_satoshis)));
717 // Convert things into internal flags and prep our state:
719 let announce = if (msg.channel_flags & 1) == 1 { true } else { false };
720 if config.peer_channel_config_limits.force_announced_channel_preference {
721 if local_config.announced_channel != announce {
722 return Err(ChannelError::Close("Peer tried to open channel but their announcement preference is different from ours".to_owned()));
725 // we either accept their preference or the preferences match
726 local_config.announced_channel = announce;
728 let background_feerate = fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Background);
730 let holder_dust_limit_satoshis = Channel::<Signer>::derive_holder_dust_limit_satoshis(background_feerate);
731 let holder_selected_channel_reserve_satoshis = Channel::<Signer>::get_holder_selected_channel_reserve_satoshis(msg.funding_satoshis);
732 if holder_selected_channel_reserve_satoshis < holder_dust_limit_satoshis {
733 return Err(ChannelError::Close(format!("Suitable channel reserve not found. remote_channel_reserve was ({}). dust_limit_satoshis is ({}).", holder_selected_channel_reserve_satoshis, holder_dust_limit_satoshis)));
735 if msg.channel_reserve_satoshis < holder_dust_limit_satoshis {
736 return Err(ChannelError::Close(format!("channel_reserve_satoshis ({}) is smaller than our dust limit ({})", msg.channel_reserve_satoshis, holder_dust_limit_satoshis)));
738 if holder_selected_channel_reserve_satoshis < msg.dust_limit_satoshis {
739 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)));
742 // check if the funder's amount for the initial commitment tx is sufficient
743 // for full fee payment
744 let funders_amount_msat = msg.funding_satoshis * 1000 - msg.push_msat;
745 let lower_limit = background_feerate as u64 * COMMITMENT_TX_BASE_WEIGHT;
746 if funders_amount_msat < lower_limit {
747 return Err(ChannelError::Close(format!("Insufficient funding amount ({}) for initial commitment. Must be at least {}", funders_amount_msat, lower_limit)));
750 let to_local_msat = msg.push_msat;
751 let to_remote_msat = funders_amount_msat - background_feerate as u64 * COMMITMENT_TX_BASE_WEIGHT;
752 if to_local_msat <= msg.channel_reserve_satoshis * 1000 && to_remote_msat <= holder_selected_channel_reserve_satoshis * 1000 {
753 return Err(ChannelError::Close("Insufficient funding amount for initial commitment".to_owned()));
756 let counterparty_shutdown_scriptpubkey = if their_features.supports_upfront_shutdown_script() {
757 match &msg.shutdown_scriptpubkey {
758 &OptionalField::Present(ref script) => {
759 // Peer is signaling upfront_shutdown and has opt-out with a 0-length script. We don't enforce anything
760 if script.len() == 0 {
762 // Peer is signaling upfront_shutdown and has provided a non-accepted scriptpubkey format. Fail the channel
763 } else if is_unsupported_shutdown_script(&their_features, script) {
764 return Err(ChannelError::Close(format!("Peer is signaling upfront_shutdown but has provided a non-accepted scriptpubkey format. script: ({})", script.to_bytes().to_hex())));
769 // 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
770 &OptionalField::Absent => {
771 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()));
776 let mut secp_ctx = Secp256k1::new();
777 secp_ctx.seeded_randomize(&keys_provider.get_secure_random_bytes());
781 config: local_config,
783 channel_id: msg.temporary_channel_id,
784 channel_state: (ChannelState::OurInitSent as u32) | (ChannelState::TheirInitSent as u32),
787 latest_monitor_update_id: 0,
790 shutdown_pubkey: keys_provider.get_shutdown_pubkey(),
791 destination_script: keys_provider.get_destination_script(),
793 cur_holder_commitment_transaction_number: INITIAL_COMMITMENT_NUMBER,
794 cur_counterparty_commitment_transaction_number: INITIAL_COMMITMENT_NUMBER,
795 value_to_self_msat: msg.push_msat,
797 pending_inbound_htlcs: Vec::new(),
798 pending_outbound_htlcs: Vec::new(),
799 holding_cell_htlc_updates: Vec::new(),
800 pending_update_fee: None,
801 holding_cell_update_fee: None,
802 next_holder_htlc_id: 0,
803 next_counterparty_htlc_id: 0,
804 update_time_counter: 1,
806 resend_order: RAACommitmentOrder::CommitmentFirst,
808 monitor_pending_funding_locked: false,
809 monitor_pending_revoke_and_ack: false,
810 monitor_pending_commitment_signed: false,
811 monitor_pending_forwards: Vec::new(),
812 monitor_pending_failures: Vec::new(),
814 #[cfg(debug_assertions)]
815 holder_max_commitment_tx_output: ::std::sync::Mutex::new((msg.push_msat, msg.funding_satoshis * 1000 - msg.push_msat)),
816 #[cfg(debug_assertions)]
817 counterparty_max_commitment_tx_output: ::std::sync::Mutex::new((msg.push_msat, msg.funding_satoshis * 1000 - msg.push_msat)),
819 last_sent_closing_fee: None,
821 funding_tx_confirmed_in: None,
822 short_channel_id: None,
823 funding_tx_confirmations: 0,
825 feerate_per_kw: msg.feerate_per_kw,
826 channel_value_satoshis: msg.funding_satoshis,
827 counterparty_dust_limit_satoshis: msg.dust_limit_satoshis,
828 holder_dust_limit_satoshis,
829 counterparty_max_htlc_value_in_flight_msat: cmp::min(msg.max_htlc_value_in_flight_msat, msg.funding_satoshis * 1000),
830 counterparty_selected_channel_reserve_satoshis: msg.channel_reserve_satoshis,
831 counterparty_htlc_minimum_msat: msg.htlc_minimum_msat,
832 holder_htlc_minimum_msat: if config.own_channel_config.our_htlc_minimum_msat == 0 { 1 } else { config.own_channel_config.our_htlc_minimum_msat },
833 counterparty_max_accepted_htlcs: msg.max_accepted_htlcs,
834 minimum_depth: config.own_channel_config.minimum_depth,
836 counterparty_forwarding_info: None,
838 channel_transaction_parameters: ChannelTransactionParameters {
839 holder_pubkeys: pubkeys,
840 holder_selected_contest_delay: config.own_channel_config.our_to_self_delay,
841 is_outbound_from_holder: false,
842 counterparty_parameters: Some(CounterpartyChannelTransactionParameters {
843 selected_contest_delay: msg.to_self_delay,
844 pubkeys: counterparty_pubkeys,
846 funding_outpoint: None
848 funding_transaction: None,
850 counterparty_cur_commitment_point: Some(msg.first_per_commitment_point),
851 counterparty_prev_commitment_point: None,
852 counterparty_node_id,
854 counterparty_shutdown_scriptpubkey,
856 commitment_secrets: CounterpartyCommitmentSecrets::new(),
858 network_sync: UpdateStatus::Fresh,
860 #[cfg(any(test, feature = "fuzztarget"))]
861 next_local_commitment_tx_fee_info_cached: Mutex::new(None),
862 #[cfg(any(test, feature = "fuzztarget"))]
863 next_remote_commitment_tx_fee_info_cached: Mutex::new(None),
869 /// Transaction nomenclature is somewhat confusing here as there are many different cases - a
870 /// transaction is referred to as "a's transaction" implying that a will be able to broadcast
871 /// the transaction. Thus, b will generally be sending a signature over such a transaction to
872 /// a, and a can revoke the transaction by providing b the relevant per_commitment_secret. As
873 /// such, a transaction is generally the result of b increasing the amount paid to a (or adding
875 /// @local is used only to convert relevant internal structures which refer to remote vs local
876 /// to decide value of outputs and direction of HTLCs.
877 /// @generated_by_local is used to determine *which* HTLCs to include - noting that the HTLC
878 /// state may indicate that one peer has informed the other that they'd like to add an HTLC but
879 /// have not yet committed it. Such HTLCs will only be included in transactions which are being
880 /// generated by the peer which proposed adding the HTLCs, and thus we need to understand both
881 /// which peer generated this transaction and "to whom" this transaction flows.
882 /// Returns (the transaction info, the number of HTLC outputs which were present in the
883 /// transaction, the list of HTLCs which were not ignored when building the transaction).
884 /// Note that below-dust HTLCs are included in the third return value, but not the second, and
885 /// sources are provided only for outbound HTLCs in the third return value.
887 fn build_commitment_transaction<L: Deref>(&self, commitment_number: u64, keys: &TxCreationKeys, local: bool, generated_by_local: bool, feerate_per_kw: u32, logger: &L) -> (CommitmentTransaction, usize, Vec<(HTLCOutputInCommitment, Option<&HTLCSource>)>) where L::Target: Logger {
888 let mut included_dust_htlcs: Vec<(HTLCOutputInCommitment, Option<&HTLCSource>)> = Vec::new();
889 let num_htlcs = self.pending_inbound_htlcs.len() + self.pending_outbound_htlcs.len();
890 let mut included_non_dust_htlcs: Vec<(HTLCOutputInCommitment, Option<&HTLCSource>)> = Vec::with_capacity(num_htlcs);
892 let broadcaster_dust_limit_satoshis = if local { self.holder_dust_limit_satoshis } else { self.counterparty_dust_limit_satoshis };
893 let mut remote_htlc_total_msat = 0;
894 let mut local_htlc_total_msat = 0;
895 let mut value_to_self_msat_offset = 0;
897 log_trace!(logger, "Building commitment transaction number {} (really {} xor {}) for {}, generated by {} with fee {}...", commitment_number, (INITIAL_COMMITMENT_NUMBER - commitment_number), get_commitment_transaction_number_obscure_factor(&self.get_holder_pubkeys().payment_point, &self.get_counterparty_pubkeys().payment_point, self.is_outbound()), if local { "us" } else { "remote" }, if generated_by_local { "us" } else { "remote" }, feerate_per_kw);
899 macro_rules! get_htlc_in_commitment {
900 ($htlc: expr, $offered: expr) => {
901 HTLCOutputInCommitment {
903 amount_msat: $htlc.amount_msat,
904 cltv_expiry: $htlc.cltv_expiry,
905 payment_hash: $htlc.payment_hash,
906 transaction_output_index: None
911 macro_rules! add_htlc_output {
912 ($htlc: expr, $outbound: expr, $source: expr, $state_name: expr) => {
913 if $outbound == local { // "offered HTLC output"
914 let htlc_in_tx = get_htlc_in_commitment!($htlc, true);
915 if $htlc.amount_msat / 1000 >= broadcaster_dust_limit_satoshis + (feerate_per_kw as u64 * HTLC_TIMEOUT_TX_WEIGHT / 1000) {
916 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);
917 included_non_dust_htlcs.push((htlc_in_tx, $source));
919 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);
920 included_dust_htlcs.push((htlc_in_tx, $source));
923 let htlc_in_tx = get_htlc_in_commitment!($htlc, false);
924 if $htlc.amount_msat / 1000 >= broadcaster_dust_limit_satoshis + (feerate_per_kw as u64 * HTLC_SUCCESS_TX_WEIGHT / 1000) {
925 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);
926 included_non_dust_htlcs.push((htlc_in_tx, $source));
928 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);
929 included_dust_htlcs.push((htlc_in_tx, $source));
935 for ref htlc in self.pending_inbound_htlcs.iter() {
936 let (include, state_name) = match htlc.state {
937 InboundHTLCState::RemoteAnnounced(_) => (!generated_by_local, "RemoteAnnounced"),
938 InboundHTLCState::AwaitingRemoteRevokeToAnnounce(_) => (!generated_by_local, "AwaitingRemoteRevokeToAnnounce"),
939 InboundHTLCState::AwaitingAnnouncedRemoteRevoke(_) => (true, "AwaitingAnnouncedRemoteRevoke"),
940 InboundHTLCState::Committed => (true, "Committed"),
941 InboundHTLCState::LocalRemoved(_) => (!generated_by_local, "LocalRemoved"),
945 add_htlc_output!(htlc, false, None, state_name);
946 remote_htlc_total_msat += htlc.amount_msat;
948 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);
950 &InboundHTLCState::LocalRemoved(ref reason) => {
951 if generated_by_local {
952 if let &InboundHTLCRemovalReason::Fulfill(_) = reason {
953 value_to_self_msat_offset += htlc.amount_msat as i64;
962 for ref htlc in self.pending_outbound_htlcs.iter() {
963 let (include, state_name) = match htlc.state {
964 OutboundHTLCState::LocalAnnounced(_) => (generated_by_local, "LocalAnnounced"),
965 OutboundHTLCState::Committed => (true, "Committed"),
966 OutboundHTLCState::RemoteRemoved(_) => (generated_by_local, "RemoteRemoved"),
967 OutboundHTLCState::AwaitingRemoteRevokeToRemove(_) => (generated_by_local, "AwaitingRemoteRevokeToRemove"),
968 OutboundHTLCState::AwaitingRemovedRemoteRevoke(_) => (false, "AwaitingRemovedRemoteRevoke"),
972 add_htlc_output!(htlc, true, Some(&htlc.source), state_name);
973 local_htlc_total_msat += htlc.amount_msat;
975 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);
977 OutboundHTLCState::AwaitingRemoteRevokeToRemove(None)|OutboundHTLCState::AwaitingRemovedRemoteRevoke(None) => {
978 value_to_self_msat_offset -= htlc.amount_msat as i64;
980 OutboundHTLCState::RemoteRemoved(None) => {
981 if !generated_by_local {
982 value_to_self_msat_offset -= htlc.amount_msat as i64;
990 let value_to_self_msat: i64 = (self.value_to_self_msat - local_htlc_total_msat) as i64 + value_to_self_msat_offset;
991 assert!(value_to_self_msat >= 0);
992 // Note that in case they have several just-awaiting-last-RAA fulfills in-progress (ie
993 // AwaitingRemoteRevokeToRemove or AwaitingRemovedRemoteRevoke) we may have allowed them to
994 // "violate" their reserve value by couting those against it. Thus, we have to convert
995 // everything to i64 before subtracting as otherwise we can overflow.
996 let 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;
997 assert!(value_to_remote_msat >= 0);
999 #[cfg(debug_assertions)]
1001 // Make sure that the to_self/to_remote is always either past the appropriate
1002 // channel_reserve *or* it is making progress towards it.
1003 let mut broadcaster_max_commitment_tx_output = if generated_by_local {
1004 self.holder_max_commitment_tx_output.lock().unwrap()
1006 self.counterparty_max_commitment_tx_output.lock().unwrap()
1008 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 as i64);
1009 broadcaster_max_commitment_tx_output.0 = cmp::max(broadcaster_max_commitment_tx_output.0, value_to_self_msat as u64);
1010 debug_assert!(broadcaster_max_commitment_tx_output.1 <= value_to_remote_msat as u64 || value_to_remote_msat / 1000 >= Channel::<Signer>::get_holder_selected_channel_reserve_satoshis(self.channel_value_satoshis) as i64);
1011 broadcaster_max_commitment_tx_output.1 = cmp::max(broadcaster_max_commitment_tx_output.1, value_to_remote_msat as u64);
1014 let total_fee = feerate_per_kw as u64 * (COMMITMENT_TX_BASE_WEIGHT + (included_non_dust_htlcs.len() as u64) * COMMITMENT_TX_WEIGHT_PER_HTLC) / 1000;
1015 let (value_to_self, value_to_remote) = if self.is_outbound() {
1016 (value_to_self_msat / 1000 - total_fee as i64, value_to_remote_msat / 1000)
1018 (value_to_self_msat / 1000, value_to_remote_msat / 1000 - total_fee as i64)
1021 let mut value_to_a = if local { value_to_self } else { value_to_remote };
1022 let mut value_to_b = if local { value_to_remote } else { value_to_self };
1024 if value_to_a >= (broadcaster_dust_limit_satoshis as i64) {
1025 log_trace!(logger, " ...including {} output with value {}", if local { "to_local" } else { "to_remote" }, value_to_a);
1030 if value_to_b >= (broadcaster_dust_limit_satoshis as i64) {
1031 log_trace!(logger, " ...including {} output with value {}", if local { "to_remote" } else { "to_local" }, value_to_b);
1036 let num_nondust_htlcs = included_non_dust_htlcs.len();
1038 let channel_parameters =
1039 if local { self.channel_transaction_parameters.as_holder_broadcastable() }
1040 else { self.channel_transaction_parameters.as_counterparty_broadcastable() };
1041 let tx = CommitmentTransaction::new_with_auxiliary_htlc_data(commitment_number,
1046 &mut included_non_dust_htlcs,
1049 let mut htlcs_included = included_non_dust_htlcs;
1050 // The unwrap is safe, because all non-dust HTLCs have been assigned an output index
1051 htlcs_included.sort_unstable_by_key(|h| h.0.transaction_output_index.unwrap());
1052 htlcs_included.append(&mut included_dust_htlcs);
1054 (tx, num_nondust_htlcs, htlcs_included)
1058 fn get_closing_scriptpubkey(&self) -> Script {
1059 let channel_close_key_hash = WPubkeyHash::hash(&self.shutdown_pubkey.serialize());
1060 Builder::new().push_opcode(opcodes::all::OP_PUSHBYTES_0).push_slice(&channel_close_key_hash[..]).into_script()
1064 fn get_closing_transaction_weight(&self, a_scriptpubkey: Option<&Script>, b_scriptpubkey: Option<&Script>) -> u64 {
1069 1 + // script length (0)
1073 )*4 + // * 4 for non-witness parts
1074 2 + // witness marker and flag
1075 1 + // witness element count
1076 4 + // 4 element lengths (2 sigs, multisig dummy, and witness script)
1077 self.get_funding_redeemscript().len() as u64 + // funding witness script
1078 2*(1 + 71); // two signatures + sighash type flags
1079 if let Some(spk) = a_scriptpubkey {
1080 ret += ((8+1) + // output values and script length
1081 spk.len() as u64) * 4; // scriptpubkey and witness multiplier
1083 if let Some(spk) = b_scriptpubkey {
1084 ret += ((8+1) + // output values and script length
1085 spk.len() as u64) * 4; // scriptpubkey and witness multiplier
1091 fn build_closing_transaction(&self, proposed_total_fee_satoshis: u64, skip_remote_output: bool) -> (Transaction, u64) {
1093 let mut ins: Vec<TxIn> = Vec::new();
1095 previous_output: self.funding_outpoint().into_bitcoin_outpoint(),
1096 script_sig: Script::new(),
1097 sequence: 0xffffffff,
1098 witness: Vec::new(),
1103 assert!(self.pending_inbound_htlcs.is_empty());
1104 assert!(self.pending_outbound_htlcs.is_empty());
1105 let mut txouts: Vec<(TxOut, ())> = Vec::new();
1107 let mut total_fee_satoshis = proposed_total_fee_satoshis;
1108 let value_to_self: i64 = (self.value_to_self_msat as i64) / 1000 - if self.is_outbound() { total_fee_satoshis as i64 } else { 0 };
1109 let value_to_remote: 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 };
1111 if value_to_self < 0 {
1112 assert!(self.is_outbound());
1113 total_fee_satoshis += (-value_to_self) as u64;
1114 } else if value_to_remote < 0 {
1115 assert!(!self.is_outbound());
1116 total_fee_satoshis += (-value_to_remote) as u64;
1119 if !skip_remote_output && value_to_remote as u64 > self.holder_dust_limit_satoshis {
1120 txouts.push((TxOut {
1121 script_pubkey: self.counterparty_shutdown_scriptpubkey.clone().unwrap(),
1122 value: value_to_remote as u64
1126 if value_to_self as u64 > self.holder_dust_limit_satoshis {
1127 txouts.push((TxOut {
1128 script_pubkey: self.get_closing_scriptpubkey(),
1129 value: value_to_self as u64
1133 transaction_utils::sort_outputs(&mut txouts, |_, _| { cmp::Ordering::Equal }); // Ordering doesnt matter if they used our pubkey...
1135 let mut outputs: Vec<TxOut> = Vec::new();
1136 for out in txouts.drain(..) {
1137 outputs.push(out.0);
1145 }, total_fee_satoshis)
1148 fn funding_outpoint(&self) -> OutPoint {
1149 self.channel_transaction_parameters.funding_outpoint.unwrap()
1153 /// Creates a set of keys for build_commitment_transaction to generate a transaction which our
1154 /// counterparty will sign (ie DO NOT send signatures over a transaction created by this to
1155 /// our counterparty!)
1156 /// The result is a transaction which we can revoke broadcastership of (ie a "local" transaction)
1157 /// TODO Some magic rust shit to compile-time check this?
1158 fn build_holder_transaction_keys(&self, commitment_number: u64) -> Result<TxCreationKeys, ChannelError> {
1159 let per_commitment_point = self.holder_signer.get_per_commitment_point(commitment_number, &self.secp_ctx);
1160 let delayed_payment_base = &self.get_holder_pubkeys().delayed_payment_basepoint;
1161 let htlc_basepoint = &self.get_holder_pubkeys().htlc_basepoint;
1162 let counterparty_pubkeys = self.get_counterparty_pubkeys();
1164 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()))
1168 /// Creates a set of keys for build_commitment_transaction to generate a transaction which we
1169 /// will sign and send to our counterparty.
1170 /// If an Err is returned, it is a ChannelError::Close (for get_outbound_funding_created)
1171 fn build_remote_transaction_keys(&self) -> Result<TxCreationKeys, ChannelError> {
1172 //TODO: Ensure that the payment_key derived here ends up in the library users' wallet as we
1173 //may see payments to it!
1174 let revocation_basepoint = &self.get_holder_pubkeys().revocation_basepoint;
1175 let htlc_basepoint = &self.get_holder_pubkeys().htlc_basepoint;
1176 let counterparty_pubkeys = self.get_counterparty_pubkeys();
1178 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()))
1181 /// Gets the redeemscript for the funding transaction output (ie the funding transaction output
1182 /// pays to get_funding_redeemscript().to_v0_p2wsh()).
1183 /// Panics if called before accept_channel/new_from_req
1184 pub fn get_funding_redeemscript(&self) -> Script {
1185 make_funding_redeemscript(&self.get_holder_pubkeys().funding_pubkey, self.counterparty_funding_pubkey())
1188 /// Builds the htlc-success or htlc-timeout transaction which spends a given HTLC output
1189 /// @local is used only to convert relevant internal structures which refer to remote vs local
1190 /// to decide value of outputs and direction of HTLCs.
1191 fn build_htlc_transaction(&self, prev_hash: &Txid, htlc: &HTLCOutputInCommitment, local: bool, keys: &TxCreationKeys, feerate_per_kw: u32) -> Transaction {
1192 chan_utils::build_htlc_transaction(prev_hash, feerate_per_kw, if local { self.get_counterparty_selected_contest_delay() } else { self.get_holder_selected_contest_delay() }, htlc, &keys.broadcaster_delayed_payment_key, &keys.revocation_key)
1195 /// Per HTLC, only one get_update_fail_htlc or get_update_fulfill_htlc call may be made.
1196 /// In such cases we debug_assert!(false) and return a ChannelError::Ignore. Thus, will always
1197 /// return Ok(_) if debug assertions are turned on or preconditions are met.
1199 /// Note that it is still possible to hit these assertions in case we find a preimage on-chain
1200 /// but then have a reorg which settles on an HTLC-failure on chain.
1201 fn get_update_fulfill_htlc<L: Deref>(&mut self, htlc_id_arg: u64, payment_preimage_arg: PaymentPreimage, logger: &L) -> Result<(Option<msgs::UpdateFulfillHTLC>, Option<ChannelMonitorUpdate>), ChannelError> where L::Target: Logger {
1202 // Either ChannelFunded got set (which means it won't be unset) or there is no way any
1203 // caller thought we could have something claimed (cause we wouldn't have accepted in an
1204 // incoming HTLC anyway). If we got to ShutdownComplete, callers aren't allowed to call us,
1206 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
1207 panic!("Was asked to fulfill an HTLC when channel was not in an operational state");
1209 assert_eq!(self.channel_state & ChannelState::ShutdownComplete as u32, 0);
1211 let payment_hash_calc = PaymentHash(Sha256::hash(&payment_preimage_arg.0[..]).into_inner());
1213 // ChannelManager may generate duplicate claims/fails due to HTLC update events from
1214 // on-chain ChannelsMonitors during block rescan. Ideally we'd figure out a way to drop
1215 // these, but for now we just have to treat them as normal.
1217 let mut pending_idx = std::usize::MAX;
1218 for (idx, htlc) in self.pending_inbound_htlcs.iter().enumerate() {
1219 if htlc.htlc_id == htlc_id_arg {
1220 assert_eq!(htlc.payment_hash, payment_hash_calc);
1222 InboundHTLCState::Committed => {},
1223 InboundHTLCState::LocalRemoved(ref reason) => {
1224 if let &InboundHTLCRemovalReason::Fulfill(_) = reason {
1226 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()));
1228 debug_assert!(false, "Tried to fulfill an HTLC that was already fail/fulfilled");
1229 return Ok((None, None));
1232 debug_assert!(false, "Have an inbound HTLC we tried to claim before it was fully committed to");
1233 // Don't return in release mode here so that we can update channel_monitor
1240 if pending_idx == std::usize::MAX {
1241 return Err(ChannelError::Ignore("Unable to find a pending HTLC which matched the given HTLC ID".to_owned()));
1244 // Now update local state:
1246 // We have to put the payment_preimage in the channel_monitor right away here to ensure we
1247 // can claim it even if the channel hits the chain before we see their next commitment.
1248 self.latest_monitor_update_id += 1;
1249 let monitor_update = ChannelMonitorUpdate {
1250 update_id: self.latest_monitor_update_id,
1251 updates: vec![ChannelMonitorUpdateStep::PaymentPreimage {
1252 payment_preimage: payment_preimage_arg.clone(),
1256 if (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32 | ChannelState::PeerDisconnected as u32 | ChannelState::MonitorUpdateFailed as u32)) != 0 {
1257 for pending_update in self.holding_cell_htlc_updates.iter() {
1258 match pending_update {
1259 &HTLCUpdateAwaitingACK::ClaimHTLC { htlc_id, .. } => {
1260 if htlc_id_arg == htlc_id {
1261 // Make sure we don't leave latest_monitor_update_id incremented here:
1262 self.latest_monitor_update_id -= 1;
1263 debug_assert!(false, "Tried to fulfill an HTLC that was already fulfilled");
1264 return Ok((None, None));
1267 &HTLCUpdateAwaitingACK::FailHTLC { htlc_id, .. } => {
1268 if htlc_id_arg == htlc_id {
1269 log_warn!(logger, "Have preimage and want to fulfill HTLC with pending failure against channel {}", log_bytes!(self.channel_id()));
1270 // TODO: We may actually be able to switch to a fulfill here, though its
1271 // rare enough it may not be worth the complexity burden.
1272 debug_assert!(false, "Tried to fulfill an HTLC that was already failed");
1273 return Ok((None, Some(monitor_update)));
1279 log_trace!(logger, "Adding HTLC claim to holding_cell! Current state: {}", self.channel_state);
1280 self.holding_cell_htlc_updates.push(HTLCUpdateAwaitingACK::ClaimHTLC {
1281 payment_preimage: payment_preimage_arg, htlc_id: htlc_id_arg,
1283 return Ok((None, Some(monitor_update)));
1287 let htlc = &mut self.pending_inbound_htlcs[pending_idx];
1288 if let InboundHTLCState::Committed = htlc.state {
1290 debug_assert!(false, "Have an inbound HTLC we tried to claim before it was fully committed to");
1291 return Ok((None, Some(monitor_update)));
1293 log_trace!(logger, "Upgrading HTLC {} to LocalRemoved with a Fulfill!", log_bytes!(htlc.payment_hash.0));
1294 htlc.state = InboundHTLCState::LocalRemoved(InboundHTLCRemovalReason::Fulfill(payment_preimage_arg.clone()));
1297 Ok((Some(msgs::UpdateFulfillHTLC {
1298 channel_id: self.channel_id(),
1299 htlc_id: htlc_id_arg,
1300 payment_preimage: payment_preimage_arg,
1301 }), Some(monitor_update)))
1304 pub fn get_update_fulfill_htlc_and_commit<L: Deref>(&mut self, htlc_id: u64, payment_preimage: PaymentPreimage, logger: &L) -> Result<(Option<(msgs::UpdateFulfillHTLC, msgs::CommitmentSigned)>, Option<ChannelMonitorUpdate>), ChannelError> where L::Target: Logger {
1305 match self.get_update_fulfill_htlc(htlc_id, payment_preimage, logger)? {
1306 (Some(update_fulfill_htlc), Some(mut monitor_update)) => {
1307 let (commitment, mut additional_update) = self.send_commitment_no_status_check(logger)?;
1308 // send_commitment_no_status_check may bump latest_monitor_id but we want them to be
1309 // strictly increasing by one, so decrement it here.
1310 self.latest_monitor_update_id = monitor_update.update_id;
1311 monitor_update.updates.append(&mut additional_update.updates);
1312 Ok((Some((update_fulfill_htlc, commitment)), Some(monitor_update)))
1314 (Some(update_fulfill_htlc), None) => {
1315 let (commitment, monitor_update) = self.send_commitment_no_status_check(logger)?;
1316 Ok((Some((update_fulfill_htlc, commitment)), Some(monitor_update)))
1318 (None, Some(monitor_update)) => Ok((None, Some(monitor_update))),
1319 (None, None) => Ok((None, None))
1323 /// Per HTLC, only one get_update_fail_htlc or get_update_fulfill_htlc call may be made.
1324 /// In such cases we debug_assert!(false) and return a ChannelError::Ignore. Thus, will always
1325 /// return Ok(_) if debug assertions are turned on or preconditions are met.
1327 /// Note that it is still possible to hit these assertions in case we find a preimage on-chain
1328 /// but then have a reorg which settles on an HTLC-failure on chain.
1329 pub fn get_update_fail_htlc(&mut self, htlc_id_arg: u64, err_packet: msgs::OnionErrorPacket) -> Result<Option<msgs::UpdateFailHTLC>, ChannelError> {
1330 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
1331 panic!("Was asked to fail an HTLC when channel was not in an operational state");
1333 assert_eq!(self.channel_state & ChannelState::ShutdownComplete as u32, 0);
1335 // ChannelManager may generate duplicate claims/fails due to HTLC update events from
1336 // on-chain ChannelsMonitors during block rescan. Ideally we'd figure out a way to drop
1337 // these, but for now we just have to treat them as normal.
1339 let mut pending_idx = std::usize::MAX;
1340 for (idx, htlc) in self.pending_inbound_htlcs.iter().enumerate() {
1341 if htlc.htlc_id == htlc_id_arg {
1343 InboundHTLCState::Committed => {},
1344 InboundHTLCState::LocalRemoved(_) => {
1345 debug_assert!(false, "Tried to fail an HTLC that was already fail/fulfilled");
1349 debug_assert!(false, "Have an inbound HTLC we tried to claim before it was fully committed to");
1350 return Err(ChannelError::Ignore(format!("Unable to find a pending HTLC which matched the given HTLC ID ({})", htlc.htlc_id)));
1356 if pending_idx == std::usize::MAX {
1357 return Err(ChannelError::Ignore("Unable to find a pending HTLC which matched the given HTLC ID".to_owned()));
1360 // Now update local state:
1361 if (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32 | ChannelState::PeerDisconnected as u32 | ChannelState::MonitorUpdateFailed as u32)) != 0 {
1362 for pending_update in self.holding_cell_htlc_updates.iter() {
1363 match pending_update {
1364 &HTLCUpdateAwaitingACK::ClaimHTLC { htlc_id, .. } => {
1365 if htlc_id_arg == htlc_id {
1366 debug_assert!(false, "Tried to fail an HTLC that was already fulfilled");
1367 return Err(ChannelError::Ignore("Unable to find a pending HTLC which matched the given HTLC ID".to_owned()));
1370 &HTLCUpdateAwaitingACK::FailHTLC { htlc_id, .. } => {
1371 if htlc_id_arg == htlc_id {
1372 debug_assert!(false, "Tried to fail an HTLC that was already failed");
1373 return Err(ChannelError::Ignore("Unable to find a pending HTLC which matched the given HTLC ID".to_owned()));
1379 self.holding_cell_htlc_updates.push(HTLCUpdateAwaitingACK::FailHTLC {
1380 htlc_id: htlc_id_arg,
1387 let htlc = &mut self.pending_inbound_htlcs[pending_idx];
1388 htlc.state = InboundHTLCState::LocalRemoved(InboundHTLCRemovalReason::FailRelay(err_packet.clone()));
1391 Ok(Some(msgs::UpdateFailHTLC {
1392 channel_id: self.channel_id(),
1393 htlc_id: htlc_id_arg,
1398 // Message handlers:
1400 pub fn accept_channel(&mut self, msg: &msgs::AcceptChannel, config: &UserConfig, their_features: InitFeatures) -> Result<(), ChannelError> {
1401 // Check sanity of message fields:
1402 if !self.is_outbound() {
1403 return Err(ChannelError::Close("Got an accept_channel message from an inbound peer".to_owned()));
1405 if self.channel_state != ChannelState::OurInitSent as u32 {
1406 return Err(ChannelError::Close("Got an accept_channel message at a strange time".to_owned()));
1408 if msg.dust_limit_satoshis > 21000000 * 100000000 {
1409 return Err(ChannelError::Close(format!("Peer never wants payout outputs? dust_limit_satoshis was {}", msg.dust_limit_satoshis)));
1411 if msg.channel_reserve_satoshis > self.channel_value_satoshis {
1412 return Err(ChannelError::Close(format!("Bogus channel_reserve_satoshis ({}). Must not be greater than ({})", msg.channel_reserve_satoshis, self.channel_value_satoshis)));
1414 if msg.dust_limit_satoshis > msg.channel_reserve_satoshis {
1415 return Err(ChannelError::Close(format!("Bogus channel_reserve ({}) and dust_limit ({})", msg.channel_reserve_satoshis, msg.dust_limit_satoshis)));
1417 if msg.channel_reserve_satoshis < self.holder_dust_limit_satoshis {
1418 return Err(ChannelError::Close(format!("Peer never wants payout outputs? channel_reserve_satoshis was ({}). dust_limit is ({})", msg.channel_reserve_satoshis, self.holder_dust_limit_satoshis)));
1420 let remote_reserve = Channel::<Signer>::get_holder_selected_channel_reserve_satoshis(self.channel_value_satoshis);
1421 if msg.dust_limit_satoshis > remote_reserve {
1422 return Err(ChannelError::Close(format!("Dust limit ({}) is bigger than our channel reserve ({})", msg.dust_limit_satoshis, remote_reserve)));
1424 let full_channel_value_msat = (self.channel_value_satoshis - msg.channel_reserve_satoshis) * 1000;
1425 if msg.htlc_minimum_msat >= full_channel_value_msat {
1426 return Err(ChannelError::Close(format!("Minimum htlc value ({}) is full channel value ({})", msg.htlc_minimum_msat, full_channel_value_msat)));
1428 let max_delay_acceptable = u16::min(config.peer_channel_config_limits.their_to_self_delay, MAX_LOCAL_BREAKDOWN_TIMEOUT);
1429 if msg.to_self_delay > max_delay_acceptable {
1430 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)));
1432 if msg.max_accepted_htlcs < 1 {
1433 return Err(ChannelError::Close("0 max_accepted_htlcs makes for a useless channel".to_owned()));
1435 if msg.max_accepted_htlcs > MAX_HTLCS {
1436 return Err(ChannelError::Close(format!("max_accepted_htlcs was {}. It must not be larger than {}", msg.max_accepted_htlcs, MAX_HTLCS)));
1439 // Now check against optional parameters as set by config...
1440 if msg.htlc_minimum_msat > config.peer_channel_config_limits.max_htlc_minimum_msat {
1441 return Err(ChannelError::Close(format!("htlc_minimum_msat ({}) is higher than the user specified limit ({})", msg.htlc_minimum_msat, config.peer_channel_config_limits.max_htlc_minimum_msat)));
1443 if msg.max_htlc_value_in_flight_msat < config.peer_channel_config_limits.min_max_htlc_value_in_flight_msat {
1444 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.peer_channel_config_limits.min_max_htlc_value_in_flight_msat)));
1446 if msg.channel_reserve_satoshis > config.peer_channel_config_limits.max_channel_reserve_satoshis {
1447 return Err(ChannelError::Close(format!("channel_reserve_satoshis ({}) is higher than the user specified limit ({})", msg.channel_reserve_satoshis, config.peer_channel_config_limits.max_channel_reserve_satoshis)));
1449 if msg.max_accepted_htlcs < config.peer_channel_config_limits.min_max_accepted_htlcs {
1450 return Err(ChannelError::Close(format!("max_accepted_htlcs ({}) is less than the user specified limit ({})", msg.max_accepted_htlcs, config.peer_channel_config_limits.min_max_accepted_htlcs)));
1452 if msg.dust_limit_satoshis < config.peer_channel_config_limits.min_dust_limit_satoshis {
1453 return Err(ChannelError::Close(format!("dust_limit_satoshis ({}) is less than the user specified limit ({})", msg.dust_limit_satoshis, config.peer_channel_config_limits.min_dust_limit_satoshis)));
1455 if msg.dust_limit_satoshis > config.peer_channel_config_limits.max_dust_limit_satoshis {
1456 return Err(ChannelError::Close(format!("dust_limit_satoshis ({}) is greater than the user specified limit ({})", msg.dust_limit_satoshis, config.peer_channel_config_limits.max_dust_limit_satoshis)));
1458 if msg.minimum_depth > config.peer_channel_config_limits.max_minimum_depth {
1459 return Err(ChannelError::Close(format!("We consider the minimum depth to be unreasonably large. Expected minimum: ({}). Actual: ({})", config.peer_channel_config_limits.max_minimum_depth, msg.minimum_depth)));
1462 let counterparty_shutdown_scriptpubkey = if their_features.supports_upfront_shutdown_script() {
1463 match &msg.shutdown_scriptpubkey {
1464 &OptionalField::Present(ref script) => {
1465 // Peer is signaling upfront_shutdown and has opt-out with a 0-length script. We don't enforce anything
1466 if script.len() == 0 {
1468 // Peer is signaling upfront_shutdown and has provided a non-accepted scriptpubkey format. Fail the channel
1469 } else if is_unsupported_shutdown_script(&their_features, script) {
1470 return Err(ChannelError::Close(format!("Peer is signaling upfront_shutdown but has provided a non-accepted scriptpubkey format. script: ({})", script.to_bytes().to_hex())));
1472 Some(script.clone())
1475 // 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
1476 &OptionalField::Absent => {
1477 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()));
1482 self.counterparty_dust_limit_satoshis = msg.dust_limit_satoshis;
1483 self.counterparty_max_htlc_value_in_flight_msat = cmp::min(msg.max_htlc_value_in_flight_msat, self.channel_value_satoshis * 1000);
1484 self.counterparty_selected_channel_reserve_satoshis = msg.channel_reserve_satoshis;
1485 self.counterparty_htlc_minimum_msat = msg.htlc_minimum_msat;
1486 self.counterparty_max_accepted_htlcs = msg.max_accepted_htlcs;
1487 self.minimum_depth = msg.minimum_depth;
1489 let counterparty_pubkeys = ChannelPublicKeys {
1490 funding_pubkey: msg.funding_pubkey,
1491 revocation_basepoint: msg.revocation_basepoint,
1492 payment_point: msg.payment_point,
1493 delayed_payment_basepoint: msg.delayed_payment_basepoint,
1494 htlc_basepoint: msg.htlc_basepoint
1497 self.channel_transaction_parameters.counterparty_parameters = Some(CounterpartyChannelTransactionParameters {
1498 selected_contest_delay: msg.to_self_delay,
1499 pubkeys: counterparty_pubkeys,
1502 self.counterparty_cur_commitment_point = Some(msg.first_per_commitment_point);
1503 self.counterparty_shutdown_scriptpubkey = counterparty_shutdown_scriptpubkey;
1505 self.channel_state = ChannelState::OurInitSent as u32 | ChannelState::TheirInitSent as u32;
1510 fn funding_created_signature<L: Deref>(&mut self, sig: &Signature, logger: &L) -> Result<(Txid, CommitmentTransaction, Signature), ChannelError> where L::Target: Logger {
1511 let funding_script = self.get_funding_redeemscript();
1513 let keys = self.build_holder_transaction_keys(self.cur_holder_commitment_transaction_number)?;
1514 let initial_commitment_tx = self.build_commitment_transaction(self.cur_holder_commitment_transaction_number, &keys, true, false, self.feerate_per_kw, logger).0;
1516 let trusted_tx = initial_commitment_tx.trust();
1517 let initial_commitment_bitcoin_tx = trusted_tx.built_transaction();
1518 let sighash = initial_commitment_bitcoin_tx.get_sighash_all(&funding_script, self.channel_value_satoshis);
1519 // They sign the holder commitment transaction...
1520 log_trace!(logger, "Checking funding_created tx signature {} by key {} against tx {} (sighash {}) with redeemscript {}", log_bytes!(sig.serialize_compact()[..]), log_bytes!(self.counterparty_funding_pubkey().serialize()), encode::serialize_hex(&initial_commitment_bitcoin_tx.transaction), log_bytes!(sighash[..]), encode::serialize_hex(&funding_script));
1521 secp_check!(self.secp_ctx.verify(&sighash, &sig, self.counterparty_funding_pubkey()), "Invalid funding_created signature from peer".to_owned());
1524 let counterparty_keys = self.build_remote_transaction_keys()?;
1525 let counterparty_initial_commitment_tx = self.build_commitment_transaction(self.cur_counterparty_commitment_transaction_number, &counterparty_keys, false, false, self.feerate_per_kw, logger).0;
1527 let counterparty_trusted_tx = counterparty_initial_commitment_tx.trust();
1528 let counterparty_initial_bitcoin_tx = counterparty_trusted_tx.built_transaction();
1529 log_trace!(logger, "Initial counterparty ID {} tx {}", counterparty_initial_bitcoin_tx.txid, encode::serialize_hex(&counterparty_initial_bitcoin_tx.transaction));
1531 let counterparty_signature = self.holder_signer.sign_counterparty_commitment(&counterparty_initial_commitment_tx, &self.secp_ctx)
1532 .map_err(|_| ChannelError::Close("Failed to get signatures for new commitment_signed".to_owned()))?.0;
1534 // We sign "counterparty" commitment transaction, allowing them to broadcast the tx if they wish.
1535 Ok((counterparty_initial_bitcoin_tx.txid, initial_commitment_tx, counterparty_signature))
1538 fn counterparty_funding_pubkey(&self) -> &PublicKey {
1539 &self.get_counterparty_pubkeys().funding_pubkey
1542 pub fn funding_created<L: Deref>(&mut self, msg: &msgs::FundingCreated, last_block_hash: BlockHash, logger: &L) -> Result<(msgs::FundingSigned, ChannelMonitor<Signer>), ChannelError> where L::Target: Logger {
1543 if self.is_outbound() {
1544 return Err(ChannelError::Close("Received funding_created for an outbound channel?".to_owned()));
1546 if self.channel_state != (ChannelState::OurInitSent as u32 | ChannelState::TheirInitSent as u32) {
1547 // BOLT 2 says that if we disconnect before we send funding_signed we SHOULD NOT
1548 // remember the channel, so it's safe to just send an error_message here and drop the
1550 return Err(ChannelError::Close("Received funding_created after we got the channel!".to_owned()));
1552 if self.commitment_secrets.get_min_seen_secret() != (1 << 48) ||
1553 self.cur_counterparty_commitment_transaction_number != INITIAL_COMMITMENT_NUMBER ||
1554 self.cur_holder_commitment_transaction_number != INITIAL_COMMITMENT_NUMBER {
1555 panic!("Should not have advanced channel commitment tx numbers prior to funding_created");
1558 let funding_txo = OutPoint { txid: msg.funding_txid, index: msg.funding_output_index };
1559 self.channel_transaction_parameters.funding_outpoint = Some(funding_txo);
1560 // This is an externally observable change before we finish all our checks. In particular
1561 // funding_created_signature may fail.
1562 self.holder_signer.ready_channel(&self.channel_transaction_parameters);
1564 let (counterparty_initial_commitment_txid, initial_commitment_tx, signature) = match self.funding_created_signature(&msg.signature, logger) {
1566 Err(ChannelError::Close(e)) => {
1567 self.channel_transaction_parameters.funding_outpoint = None;
1568 return Err(ChannelError::Close(e));
1571 // The only error we know how to handle is ChannelError::Close, so we fall over here
1572 // to make sure we don't continue with an inconsistent state.
1573 panic!("unexpected error type from funding_created_signature {:?}", e);
1577 let holder_commitment_tx = HolderCommitmentTransaction::new(
1578 initial_commitment_tx,
1581 &self.get_holder_pubkeys().funding_pubkey,
1582 self.counterparty_funding_pubkey()
1585 // Now that we're past error-generating stuff, update our local state:
1587 let funding_redeemscript = self.get_funding_redeemscript();
1588 let funding_txo_script = funding_redeemscript.to_v0_p2wsh();
1589 let obscure_factor = get_commitment_transaction_number_obscure_factor(&self.get_holder_pubkeys().payment_point, &self.get_counterparty_pubkeys().payment_point, self.is_outbound());
1590 let channel_monitor = ChannelMonitor::new(self.secp_ctx.clone(), self.holder_signer.clone(),
1591 &self.shutdown_pubkey, self.get_holder_selected_contest_delay(),
1592 &self.destination_script, (funding_txo, funding_txo_script.clone()),
1593 &self.channel_transaction_parameters,
1594 funding_redeemscript.clone(), self.channel_value_satoshis,
1596 holder_commitment_tx, last_block_hash);
1598 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);
1600 self.channel_state = ChannelState::FundingSent as u32;
1601 self.channel_id = funding_txo.to_channel_id();
1602 self.cur_counterparty_commitment_transaction_number -= 1;
1603 self.cur_holder_commitment_transaction_number -= 1;
1605 Ok((msgs::FundingSigned {
1606 channel_id: self.channel_id,
1608 }, channel_monitor))
1611 /// Handles a funding_signed message from the remote end.
1612 /// If this call is successful, broadcast the funding transaction (and not before!)
1613 pub fn funding_signed<L: Deref>(&mut self, msg: &msgs::FundingSigned, last_block_hash: BlockHash, logger: &L) -> Result<(ChannelMonitor<Signer>, Transaction), ChannelError> where L::Target: Logger {
1614 if !self.is_outbound() {
1615 return Err(ChannelError::Close("Received funding_signed for an inbound channel?".to_owned()));
1617 if self.channel_state & !(ChannelState::MonitorUpdateFailed as u32) != ChannelState::FundingCreated as u32 {
1618 return Err(ChannelError::Close("Received funding_signed in strange state!".to_owned()));
1620 if self.commitment_secrets.get_min_seen_secret() != (1 << 48) ||
1621 self.cur_counterparty_commitment_transaction_number != INITIAL_COMMITMENT_NUMBER ||
1622 self.cur_holder_commitment_transaction_number != INITIAL_COMMITMENT_NUMBER {
1623 panic!("Should not have advanced channel commitment tx numbers prior to funding_created");
1626 let funding_script = self.get_funding_redeemscript();
1628 let counterparty_keys = self.build_remote_transaction_keys()?;
1629 let counterparty_initial_commitment_tx = self.build_commitment_transaction(self.cur_counterparty_commitment_transaction_number, &counterparty_keys, false, false, self.feerate_per_kw, logger).0;
1630 let counterparty_trusted_tx = counterparty_initial_commitment_tx.trust();
1631 let counterparty_initial_bitcoin_tx = counterparty_trusted_tx.built_transaction();
1633 log_trace!(logger, "Initial counterparty ID {} tx {}", counterparty_initial_bitcoin_tx.txid, encode::serialize_hex(&counterparty_initial_bitcoin_tx.transaction));
1635 let holder_signer = self.build_holder_transaction_keys(self.cur_holder_commitment_transaction_number)?;
1636 let initial_commitment_tx = self.build_commitment_transaction(self.cur_holder_commitment_transaction_number, &holder_signer, true, false, self.feerate_per_kw, logger).0;
1638 let trusted_tx = initial_commitment_tx.trust();
1639 let initial_commitment_bitcoin_tx = trusted_tx.built_transaction();
1640 let sighash = initial_commitment_bitcoin_tx.get_sighash_all(&funding_script, self.channel_value_satoshis);
1641 // They sign our commitment transaction, allowing us to broadcast the tx if we wish.
1642 if let Err(_) = self.secp_ctx.verify(&sighash, &msg.signature, &self.get_counterparty_pubkeys().funding_pubkey) {
1643 return Err(ChannelError::Close("Invalid funding_signed signature from peer".to_owned()));
1647 let holder_commitment_tx = HolderCommitmentTransaction::new(
1648 initial_commitment_tx,
1651 &self.get_holder_pubkeys().funding_pubkey,
1652 self.counterparty_funding_pubkey()
1656 let funding_redeemscript = self.get_funding_redeemscript();
1657 let funding_txo = self.get_funding_txo().unwrap();
1658 let funding_txo_script = funding_redeemscript.to_v0_p2wsh();
1659 let obscure_factor = get_commitment_transaction_number_obscure_factor(&self.get_holder_pubkeys().payment_point, &self.get_counterparty_pubkeys().payment_point, self.is_outbound());
1660 let channel_monitor = ChannelMonitor::new(self.secp_ctx.clone(), self.holder_signer.clone(),
1661 &self.shutdown_pubkey, self.get_holder_selected_contest_delay(),
1662 &self.destination_script, (funding_txo, funding_txo_script),
1663 &self.channel_transaction_parameters,
1664 funding_redeemscript.clone(), self.channel_value_satoshis,
1666 holder_commitment_tx, last_block_hash);
1668 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);
1670 assert_eq!(self.channel_state & (ChannelState::MonitorUpdateFailed as u32), 0); // We have no had any monitor(s) yet to fail update!
1671 self.channel_state = ChannelState::FundingSent as u32;
1672 self.cur_holder_commitment_transaction_number -= 1;
1673 self.cur_counterparty_commitment_transaction_number -= 1;
1675 Ok((channel_monitor, self.funding_transaction.as_ref().cloned().unwrap()))
1678 pub fn funding_locked(&mut self, msg: &msgs::FundingLocked) -> Result<(), ChannelError> {
1679 if self.channel_state & (ChannelState::PeerDisconnected as u32) == ChannelState::PeerDisconnected as u32 {
1680 return Err(ChannelError::Close("Peer sent funding_locked when we needed a channel_reestablish".to_owned()));
1683 let non_shutdown_state = self.channel_state & (!MULTI_STATE_FLAGS);
1685 if non_shutdown_state == ChannelState::FundingSent as u32 {
1686 self.channel_state |= ChannelState::TheirFundingLocked as u32;
1687 } else if non_shutdown_state == (ChannelState::FundingSent as u32 | ChannelState::OurFundingLocked as u32) {
1688 self.channel_state = ChannelState::ChannelFunded as u32 | (self.channel_state & MULTI_STATE_FLAGS);
1689 self.update_time_counter += 1;
1690 } else if (self.channel_state & (ChannelState::ChannelFunded as u32) != 0 &&
1691 // Note that funding_signed/funding_created will have decremented both by 1!
1692 self.cur_holder_commitment_transaction_number == INITIAL_COMMITMENT_NUMBER - 1 &&
1693 self.cur_counterparty_commitment_transaction_number == INITIAL_COMMITMENT_NUMBER - 1) ||
1694 // If we reconnected before sending our funding locked they may still resend theirs:
1695 (self.channel_state & (ChannelState::FundingSent as u32 | ChannelState::TheirFundingLocked as u32) ==
1696 (ChannelState::FundingSent as u32 | ChannelState::TheirFundingLocked as u32)) {
1697 if self.counterparty_cur_commitment_point != Some(msg.next_per_commitment_point) {
1698 return Err(ChannelError::Close("Peer sent a reconnect funding_locked with a different point".to_owned()));
1700 // They probably disconnected/reconnected and re-sent the funding_locked, which is required
1703 return Err(ChannelError::Close("Peer sent a funding_locked at a strange time".to_owned()));
1706 self.counterparty_prev_commitment_point = self.counterparty_cur_commitment_point;
1707 self.counterparty_cur_commitment_point = Some(msg.next_per_commitment_point);
1711 /// Returns (inbound_htlc_count, htlc_inbound_value_msat)
1712 fn get_inbound_pending_htlc_stats(&self) -> (u32, u64) {
1713 let mut htlc_inbound_value_msat = 0;
1714 for ref htlc in self.pending_inbound_htlcs.iter() {
1715 htlc_inbound_value_msat += htlc.amount_msat;
1717 (self.pending_inbound_htlcs.len() as u32, htlc_inbound_value_msat)
1720 /// Returns (outbound_htlc_count, htlc_outbound_value_msat) *including* pending adds in our
1722 fn get_outbound_pending_htlc_stats(&self) -> (u32, u64) {
1723 let mut htlc_outbound_value_msat = 0;
1724 for ref htlc in self.pending_outbound_htlcs.iter() {
1725 htlc_outbound_value_msat += htlc.amount_msat;
1728 let mut htlc_outbound_count = self.pending_outbound_htlcs.len();
1729 for update in self.holding_cell_htlc_updates.iter() {
1730 if let &HTLCUpdateAwaitingACK::AddHTLC { ref amount_msat, .. } = update {
1731 htlc_outbound_count += 1;
1732 htlc_outbound_value_msat += amount_msat;
1736 (htlc_outbound_count as u32, htlc_outbound_value_msat)
1739 /// Get the available (ie not including pending HTLCs) inbound and outbound balance in msat.
1740 /// Doesn't bother handling the
1741 /// if-we-removed-it-already-but-haven't-fully-resolved-they-can-still-send-an-inbound-HTLC
1742 /// corner case properly.
1743 pub fn get_inbound_outbound_available_balance_msat(&self) -> (u64, u64) {
1744 // Note that we have to handle overflow due to the above case.
1745 (cmp::max(self.channel_value_satoshis as i64 * 1000 - self.value_to_self_msat as i64 - self.get_inbound_pending_htlc_stats().1 as i64, 0) as u64,
1746 cmp::max(self.value_to_self_msat as i64 - self.get_outbound_pending_htlc_stats().1 as i64, 0) as u64)
1749 // Get the fee cost of a commitment tx with a given number of HTLC outputs.
1750 // Note that num_htlcs should not include dust HTLCs.
1751 fn commit_tx_fee_msat(&self, num_htlcs: usize) -> u64 {
1752 // Note that we need to divide before multiplying to round properly,
1753 // since the lowest denomination of bitcoin on-chain is the satoshi.
1754 (COMMITMENT_TX_BASE_WEIGHT + num_htlcs as u64 * COMMITMENT_TX_WEIGHT_PER_HTLC) * self.feerate_per_kw as u64 / 1000 * 1000
1757 // Get the commitment tx fee for the local's (i.e. our) next commitment transaction based on the
1758 // number of pending HTLCs that are on track to be in our next commitment tx, plus an additional
1759 // HTLC if `fee_spike_buffer_htlc` is Some, plus a new HTLC given by `new_htlc_amount`. Dust HTLCs
1761 fn next_local_commit_tx_fee_msat(&self, htlc: HTLCCandidate, fee_spike_buffer_htlc: Option<()>) -> u64 {
1762 assert!(self.is_outbound());
1764 let real_dust_limit_success_sat = (self.feerate_per_kw as u64 * HTLC_SUCCESS_TX_WEIGHT / 1000) + self.holder_dust_limit_satoshis;
1765 let real_dust_limit_timeout_sat = (self.feerate_per_kw as u64 * HTLC_TIMEOUT_TX_WEIGHT / 1000) + self.holder_dust_limit_satoshis;
1767 let mut addl_htlcs = 0;
1768 if fee_spike_buffer_htlc.is_some() { addl_htlcs += 1; }
1770 HTLCInitiator::LocalOffered => {
1771 if htlc.amount_msat / 1000 >= real_dust_limit_timeout_sat {
1775 HTLCInitiator::RemoteOffered => {
1776 if htlc.amount_msat / 1000 >= real_dust_limit_success_sat {
1782 let mut included_htlcs = 0;
1783 for ref htlc in self.pending_inbound_htlcs.iter() {
1784 if htlc.amount_msat / 1000 < real_dust_limit_success_sat {
1787 // We include LocalRemoved HTLCs here because we may still need to broadcast a commitment
1788 // transaction including this HTLC if it times out before they RAA.
1789 included_htlcs += 1;
1792 for ref htlc in self.pending_outbound_htlcs.iter() {
1793 if htlc.amount_msat / 1000 < real_dust_limit_timeout_sat {
1797 OutboundHTLCState::LocalAnnounced {..} => included_htlcs += 1,
1798 OutboundHTLCState::Committed => included_htlcs += 1,
1799 OutboundHTLCState::RemoteRemoved {..} => included_htlcs += 1,
1800 // We don't include AwaitingRemoteRevokeToRemove HTLCs because our next commitment
1801 // transaction won't be generated until they send us their next RAA, which will mean
1802 // dropping any HTLCs in this state.
1807 for htlc in self.holding_cell_htlc_updates.iter() {
1809 &HTLCUpdateAwaitingACK::AddHTLC { amount_msat, .. } => {
1810 if amount_msat / 1000 < real_dust_limit_timeout_sat {
1815 _ => {}, // Don't include claims/fails that are awaiting ack, because once we get the
1816 // ack we're guaranteed to never include them in commitment txs anymore.
1820 let num_htlcs = included_htlcs + addl_htlcs;
1821 let res = self.commit_tx_fee_msat(num_htlcs);
1822 #[cfg(any(test, feature = "fuzztarget"))]
1825 if fee_spike_buffer_htlc.is_some() {
1826 fee = self.commit_tx_fee_msat(num_htlcs - 1);
1828 let total_pending_htlcs = self.pending_inbound_htlcs.len() + self.pending_outbound_htlcs.len()
1829 + self.holding_cell_htlc_updates.len();
1830 let commitment_tx_info = CommitmentTxInfoCached {
1832 total_pending_htlcs,
1833 next_holder_htlc_id: match htlc.origin {
1834 HTLCInitiator::LocalOffered => self.next_holder_htlc_id + 1,
1835 HTLCInitiator::RemoteOffered => self.next_holder_htlc_id,
1837 next_counterparty_htlc_id: match htlc.origin {
1838 HTLCInitiator::LocalOffered => self.next_counterparty_htlc_id,
1839 HTLCInitiator::RemoteOffered => self.next_counterparty_htlc_id + 1,
1841 feerate: self.feerate_per_kw,
1843 *self.next_local_commitment_tx_fee_info_cached.lock().unwrap() = Some(commitment_tx_info);
1848 // Get the commitment tx fee for the remote's next commitment transaction based on the number of
1849 // pending HTLCs that are on track to be in their next commitment tx, plus an additional HTLC if
1850 // `fee_spike_buffer_htlc` is Some, plus a new HTLC given by `new_htlc_amount`. Dust HTLCs are
1852 fn next_remote_commit_tx_fee_msat(&self, htlc: HTLCCandidate, fee_spike_buffer_htlc: Option<()>) -> u64 {
1853 assert!(!self.is_outbound());
1855 let real_dust_limit_success_sat = (self.feerate_per_kw as u64 * HTLC_SUCCESS_TX_WEIGHT / 1000) + self.counterparty_dust_limit_satoshis;
1856 let real_dust_limit_timeout_sat = (self.feerate_per_kw as u64 * HTLC_TIMEOUT_TX_WEIGHT / 1000) + self.counterparty_dust_limit_satoshis;
1858 let mut addl_htlcs = 0;
1859 if fee_spike_buffer_htlc.is_some() { addl_htlcs += 1; }
1861 HTLCInitiator::LocalOffered => {
1862 if htlc.amount_msat / 1000 >= real_dust_limit_success_sat {
1866 HTLCInitiator::RemoteOffered => {
1867 if htlc.amount_msat / 1000 >= real_dust_limit_timeout_sat {
1873 // When calculating the set of HTLCs which will be included in their next commitment_signed, all
1874 // non-dust inbound HTLCs are included (as all states imply it will be included) and only
1875 // committed outbound HTLCs, see below.
1876 let mut included_htlcs = 0;
1877 for ref htlc in self.pending_inbound_htlcs.iter() {
1878 if htlc.amount_msat / 1000 <= real_dust_limit_timeout_sat {
1881 included_htlcs += 1;
1884 for ref htlc in self.pending_outbound_htlcs.iter() {
1885 if htlc.amount_msat / 1000 <= real_dust_limit_success_sat {
1888 // We only include outbound HTLCs if it will not be included in their next commitment_signed,
1889 // i.e. if they've responded to us with an RAA after announcement.
1891 OutboundHTLCState::Committed => included_htlcs += 1,
1892 OutboundHTLCState::RemoteRemoved {..} => included_htlcs += 1,
1893 OutboundHTLCState::LocalAnnounced { .. } => included_htlcs += 1,
1898 let num_htlcs = included_htlcs + addl_htlcs;
1899 let res = self.commit_tx_fee_msat(num_htlcs);
1900 #[cfg(any(test, feature = "fuzztarget"))]
1903 if fee_spike_buffer_htlc.is_some() {
1904 fee = self.commit_tx_fee_msat(num_htlcs - 1);
1906 let total_pending_htlcs = self.pending_inbound_htlcs.len() + self.pending_outbound_htlcs.len();
1907 let commitment_tx_info = CommitmentTxInfoCached {
1909 total_pending_htlcs,
1910 next_holder_htlc_id: match htlc.origin {
1911 HTLCInitiator::LocalOffered => self.next_holder_htlc_id + 1,
1912 HTLCInitiator::RemoteOffered => self.next_holder_htlc_id,
1914 next_counterparty_htlc_id: match htlc.origin {
1915 HTLCInitiator::LocalOffered => self.next_counterparty_htlc_id,
1916 HTLCInitiator::RemoteOffered => self.next_counterparty_htlc_id + 1,
1918 feerate: self.feerate_per_kw,
1920 *self.next_remote_commitment_tx_fee_info_cached.lock().unwrap() = Some(commitment_tx_info);
1925 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>
1926 where F: for<'a> Fn(&'a Self, PendingHTLCStatus, u16) -> PendingHTLCStatus, L::Target: Logger {
1927 // We can't accept HTLCs sent after we've sent a shutdown.
1928 let local_sent_shutdown = (self.channel_state & (ChannelState::ChannelFunded as u32 | ChannelState::LocalShutdownSent as u32)) != (ChannelState::ChannelFunded as u32);
1929 if local_sent_shutdown {
1930 pending_forward_status = create_pending_htlc_status(self, pending_forward_status, 0x1000|20);
1932 // If the remote has sent a shutdown prior to adding this HTLC, then they are in violation of the spec.
1933 let remote_sent_shutdown = (self.channel_state & (ChannelState::ChannelFunded as u32 | ChannelState::RemoteShutdownSent as u32)) != (ChannelState::ChannelFunded as u32);
1934 if remote_sent_shutdown {
1935 return Err(ChannelError::Close("Got add HTLC message when channel was not in an operational state".to_owned()));
1937 if self.channel_state & (ChannelState::PeerDisconnected as u32) == ChannelState::PeerDisconnected as u32 {
1938 return Err(ChannelError::Close("Peer sent update_add_htlc when we needed a channel_reestablish".to_owned()));
1940 if msg.amount_msat > self.channel_value_satoshis * 1000 {
1941 return Err(ChannelError::Close("Remote side tried to send more than the total value of the channel".to_owned()));
1943 if msg.amount_msat == 0 {
1944 return Err(ChannelError::Close("Remote side tried to send a 0-msat HTLC".to_owned()));
1946 if msg.amount_msat < self.holder_htlc_minimum_msat {
1947 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)));
1950 let (inbound_htlc_count, htlc_inbound_value_msat) = self.get_inbound_pending_htlc_stats();
1951 if inbound_htlc_count + 1 > OUR_MAX_HTLCS as u32 {
1952 return Err(ChannelError::Close(format!("Remote tried to push more than our max accepted HTLCs ({})", OUR_MAX_HTLCS)));
1954 let holder_max_htlc_value_in_flight_msat = Channel::<Signer>::get_holder_max_htlc_value_in_flight_msat(self.channel_value_satoshis);
1955 if htlc_inbound_value_msat + msg.amount_msat > holder_max_htlc_value_in_flight_msat {
1956 return Err(ChannelError::Close(format!("Remote HTLC add would put them over our max HTLC value ({})", holder_max_htlc_value_in_flight_msat)));
1958 // Check holder_selected_channel_reserve_satoshis (we're getting paid, so they have to at least meet
1959 // the reserve_satoshis we told them to always have as direct payment so that they lose
1960 // something if we punish them for broadcasting an old state).
1961 // Note that we don't really care about having a small/no to_remote output in our local
1962 // commitment transactions, as the purpose of the channel reserve is to ensure we can
1963 // punish *them* if they misbehave, so we discount any outbound HTLCs which will not be
1964 // present in the next commitment transaction we send them (at least for fulfilled ones,
1965 // failed ones won't modify value_to_self).
1966 // Note that we will send HTLCs which another instance of rust-lightning would think
1967 // violate the reserve value if we do not do this (as we forget inbound HTLCs from the
1968 // Channel state once they will not be present in the next received commitment
1970 let mut removed_outbound_total_msat = 0;
1971 for ref htlc in self.pending_outbound_htlcs.iter() {
1972 if let OutboundHTLCState::AwaitingRemoteRevokeToRemove(None) = htlc.state {
1973 removed_outbound_total_msat += htlc.amount_msat;
1974 } else if let OutboundHTLCState::AwaitingRemovedRemoteRevoke(None) = htlc.state {
1975 removed_outbound_total_msat += htlc.amount_msat;
1979 let pending_value_to_self_msat =
1980 self.value_to_self_msat + htlc_inbound_value_msat - removed_outbound_total_msat;
1981 let pending_remote_value_msat =
1982 self.channel_value_satoshis * 1000 - pending_value_to_self_msat;
1983 if pending_remote_value_msat < msg.amount_msat {
1984 return Err(ChannelError::Close("Remote HTLC add would overdraw remaining funds".to_owned()));
1987 // Check that the remote can afford to pay for this HTLC on-chain at the current
1988 // feerate_per_kw, while maintaining their channel reserve (as required by the spec).
1989 let remote_commit_tx_fee_msat = if self.is_outbound() { 0 } else {
1990 let htlc_candidate = HTLCCandidate::new(msg.amount_msat, HTLCInitiator::RemoteOffered);
1991 self.next_remote_commit_tx_fee_msat(htlc_candidate, None) // Don't include the extra fee spike buffer HTLC in calculations
1993 if pending_remote_value_msat - msg.amount_msat < remote_commit_tx_fee_msat {
1994 return Err(ChannelError::Close("Remote HTLC add would not leave enough to pay for fees".to_owned()));
1997 let chan_reserve_msat =
1998 Channel::<Signer>::get_holder_selected_channel_reserve_satoshis(self.channel_value_satoshis) * 1000;
1999 if pending_remote_value_msat - msg.amount_msat - remote_commit_tx_fee_msat < chan_reserve_msat {
2000 return Err(ChannelError::Close("Remote HTLC add would put them under remote reserve value".to_owned()));
2003 if !self.is_outbound() {
2004 // `2 *` and `Some(())` is for the fee spike buffer we keep for the remote. This deviates from
2005 // the spec because in the spec, the fee spike buffer requirement doesn't exist on the
2006 // receiver's side, only on the sender's.
2007 // Note that when we eventually remove support for fee updates and switch to anchor output
2008 // fees, we will drop the `2 *`, since we no longer be as sensitive to fee spikes. But, keep
2009 // the extra htlc when calculating the next remote commitment transaction fee as we should
2010 // still be able to afford adding this HTLC plus one more future HTLC, regardless of being
2011 // sensitive to fee spikes.
2012 let htlc_candidate = HTLCCandidate::new(msg.amount_msat, HTLCInitiator::RemoteOffered);
2013 let remote_fee_cost_incl_stuck_buffer_msat = 2 * self.next_remote_commit_tx_fee_msat(htlc_candidate, Some(()));
2014 if pending_remote_value_msat - msg.amount_msat - chan_reserve_msat < remote_fee_cost_incl_stuck_buffer_msat {
2015 // Note that if the pending_forward_status is not updated here, then it's because we're already failing
2016 // the HTLC, i.e. its status is already set to failing.
2017 log_info!(logger, "Attempting to fail HTLC due to fee spike buffer violation");
2018 pending_forward_status = create_pending_htlc_status(self, pending_forward_status, 0x1000|7);
2021 // Check that they won't violate our local required channel reserve by adding this HTLC.
2022 let htlc_candidate = HTLCCandidate::new(msg.amount_msat, HTLCInitiator::RemoteOffered);
2023 let local_commit_tx_fee_msat = self.next_local_commit_tx_fee_msat(htlc_candidate, None);
2024 if self.value_to_self_msat < self.counterparty_selected_channel_reserve_satoshis * 1000 + local_commit_tx_fee_msat {
2025 return Err(ChannelError::Close("Cannot accept HTLC that would put our balance under counterparty-announced channel reserve value".to_owned()));
2028 if self.next_counterparty_htlc_id != msg.htlc_id {
2029 return Err(ChannelError::Close(format!("Remote skipped HTLC ID (skipped ID: {})", self.next_counterparty_htlc_id)));
2031 if msg.cltv_expiry >= 500000000 {
2032 return Err(ChannelError::Close("Remote provided CLTV expiry in seconds instead of block height".to_owned()));
2035 if self.channel_state & ChannelState::LocalShutdownSent as u32 != 0 {
2036 if let PendingHTLCStatus::Forward(_) = pending_forward_status {
2037 panic!("ChannelManager shouldn't be trying to add a forwardable HTLC after we've started closing");
2041 // Now update local state:
2042 self.next_counterparty_htlc_id += 1;
2043 self.pending_inbound_htlcs.push(InboundHTLCOutput {
2044 htlc_id: msg.htlc_id,
2045 amount_msat: msg.amount_msat,
2046 payment_hash: msg.payment_hash,
2047 cltv_expiry: msg.cltv_expiry,
2048 state: InboundHTLCState::RemoteAnnounced(pending_forward_status),
2053 /// Marks an outbound HTLC which we have received update_fail/fulfill/malformed
2055 fn mark_outbound_htlc_removed(&mut self, htlc_id: u64, check_preimage: Option<PaymentHash>, fail_reason: Option<HTLCFailReason>) -> Result<&HTLCSource, ChannelError> {
2056 for htlc in self.pending_outbound_htlcs.iter_mut() {
2057 if htlc.htlc_id == htlc_id {
2058 match check_preimage {
2060 Some(payment_hash) =>
2061 if payment_hash != htlc.payment_hash {
2062 return Err(ChannelError::Close(format!("Remote tried to fulfill HTLC ({}) with an incorrect preimage", htlc_id)));
2066 OutboundHTLCState::LocalAnnounced(_) =>
2067 return Err(ChannelError::Close(format!("Remote tried to fulfill/fail HTLC ({}) before it had been committed", htlc_id))),
2068 OutboundHTLCState::Committed => {
2069 htlc.state = OutboundHTLCState::RemoteRemoved(fail_reason);
2071 OutboundHTLCState::AwaitingRemoteRevokeToRemove(_) | OutboundHTLCState::AwaitingRemovedRemoteRevoke(_) | OutboundHTLCState::RemoteRemoved(_) =>
2072 return Err(ChannelError::Close(format!("Remote tried to fulfill/fail HTLC ({}) that they'd already fulfilled/failed", htlc_id))),
2074 return Ok(&htlc.source);
2077 Err(ChannelError::Close("Remote tried to fulfill/fail an HTLC we couldn't find".to_owned()))
2080 pub fn update_fulfill_htlc(&mut self, msg: &msgs::UpdateFulfillHTLC) -> Result<HTLCSource, ChannelError> {
2081 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
2082 return Err(ChannelError::Close("Got fulfill HTLC message when channel was not in an operational state".to_owned()));
2084 if self.channel_state & (ChannelState::PeerDisconnected as u32) == ChannelState::PeerDisconnected as u32 {
2085 return Err(ChannelError::Close("Peer sent update_fulfill_htlc when we needed a channel_reestablish".to_owned()));
2088 let payment_hash = PaymentHash(Sha256::hash(&msg.payment_preimage.0[..]).into_inner());
2089 self.mark_outbound_htlc_removed(msg.htlc_id, Some(payment_hash), None).map(|source| source.clone())
2092 pub fn update_fail_htlc(&mut self, msg: &msgs::UpdateFailHTLC, fail_reason: HTLCFailReason) -> Result<(), ChannelError> {
2093 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
2094 return Err(ChannelError::Close("Got fail HTLC message when channel was not in an operational state".to_owned()));
2096 if self.channel_state & (ChannelState::PeerDisconnected as u32) == ChannelState::PeerDisconnected as u32 {
2097 return Err(ChannelError::Close("Peer sent update_fail_htlc when we needed a channel_reestablish".to_owned()));
2100 self.mark_outbound_htlc_removed(msg.htlc_id, None, Some(fail_reason))?;
2104 pub fn update_fail_malformed_htlc(&mut self, msg: &msgs::UpdateFailMalformedHTLC, fail_reason: HTLCFailReason) -> Result<(), ChannelError> {
2105 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
2106 return Err(ChannelError::Close("Got fail malformed HTLC message when channel was not in an operational state".to_owned()));
2108 if self.channel_state & (ChannelState::PeerDisconnected as u32) == ChannelState::PeerDisconnected as u32 {
2109 return Err(ChannelError::Close("Peer sent update_fail_malformed_htlc when we needed a channel_reestablish".to_owned()));
2112 self.mark_outbound_htlc_removed(msg.htlc_id, None, Some(fail_reason))?;
2116 pub fn commitment_signed<F: Deref, L: Deref>(&mut self, msg: &msgs::CommitmentSigned, fee_estimator: &F, logger: &L) -> Result<(msgs::RevokeAndACK, Option<msgs::CommitmentSigned>, Option<msgs::ClosingSigned>, ChannelMonitorUpdate), (Option<ChannelMonitorUpdate>, ChannelError)>
2117 where F::Target: FeeEstimator,
2120 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
2121 return Err((None, ChannelError::Close("Got commitment signed message when channel was not in an operational state".to_owned())));
2123 if self.channel_state & (ChannelState::PeerDisconnected as u32) == ChannelState::PeerDisconnected as u32 {
2124 return Err((None, ChannelError::Close("Peer sent commitment_signed when we needed a channel_reestablish".to_owned())));
2126 if self.channel_state & BOTH_SIDES_SHUTDOWN_MASK == BOTH_SIDES_SHUTDOWN_MASK && self.last_sent_closing_fee.is_some() {
2127 return Err((None, ChannelError::Close("Peer sent commitment_signed after we'd started exchanging closing_signeds".to_owned())));
2130 let funding_script = self.get_funding_redeemscript();
2132 let keys = self.build_holder_transaction_keys(self.cur_holder_commitment_transaction_number).map_err(|e| (None, e))?;
2134 let mut update_fee = false;
2135 let feerate_per_kw = if !self.is_outbound() && self.pending_update_fee.is_some() {
2137 self.pending_update_fee.unwrap()
2142 let (num_htlcs, mut htlcs_cloned, commitment_tx, commitment_txid) = {
2143 let commitment_tx = self.build_commitment_transaction(self.cur_holder_commitment_transaction_number, &keys, true, false, feerate_per_kw, logger);
2144 let commitment_txid = {
2145 let trusted_tx = commitment_tx.0.trust();
2146 let bitcoin_tx = trusted_tx.built_transaction();
2147 let sighash = bitcoin_tx.get_sighash_all(&funding_script, self.channel_value_satoshis);
2149 log_trace!(logger, "Checking commitment tx signature {} by key {} against tx {} (sighash {}) with redeemscript {}", log_bytes!(msg.signature.serialize_compact()[..]), log_bytes!(self.counterparty_funding_pubkey().serialize()), encode::serialize_hex(&bitcoin_tx.transaction), log_bytes!(sighash[..]), encode::serialize_hex(&funding_script));
2150 if let Err(_) = self.secp_ctx.verify(&sighash, &msg.signature, &self.counterparty_funding_pubkey()) {
2151 return Err((None, ChannelError::Close("Invalid commitment tx signature from peer".to_owned())));
2155 let htlcs_cloned: Vec<_> = commitment_tx.2.iter().map(|htlc| (htlc.0.clone(), htlc.1.map(|h| h.clone()))).collect();
2156 (commitment_tx.1, htlcs_cloned, commitment_tx.0, commitment_txid)
2159 let total_fee = feerate_per_kw as u64 * (COMMITMENT_TX_BASE_WEIGHT + (num_htlcs as u64) * COMMITMENT_TX_WEIGHT_PER_HTLC) / 1000;
2160 //If channel fee was updated by funder confirm funder can afford the new fee rate when applied to the current local commitment transaction
2162 let counterparty_reserve_we_require = Channel::<Signer>::get_holder_selected_channel_reserve_satoshis(self.channel_value_satoshis);
2163 if self.channel_value_satoshis - self.value_to_self_msat / 1000 < total_fee + counterparty_reserve_we_require {
2164 return Err((None, ChannelError::Close("Funding remote cannot afford proposed new fee".to_owned())));
2167 #[cfg(any(test, feature = "fuzztarget"))]
2169 if self.is_outbound() {
2170 let projected_commit_tx_info = self.next_local_commitment_tx_fee_info_cached.lock().unwrap().take();
2171 *self.next_remote_commitment_tx_fee_info_cached.lock().unwrap() = None;
2172 if let Some(info) = projected_commit_tx_info {
2173 let total_pending_htlcs = self.pending_inbound_htlcs.len() + self.pending_outbound_htlcs.len()
2174 + self.holding_cell_htlc_updates.len();
2175 if info.total_pending_htlcs == total_pending_htlcs
2176 && info.next_holder_htlc_id == self.next_holder_htlc_id
2177 && info.next_counterparty_htlc_id == self.next_counterparty_htlc_id
2178 && info.feerate == self.feerate_per_kw {
2179 assert_eq!(total_fee, info.fee / 1000);
2185 if msg.htlc_signatures.len() != num_htlcs {
2186 return Err((None, ChannelError::Close(format!("Got wrong number of HTLC signatures ({}) from remote. It must be {}", msg.htlc_signatures.len(), num_htlcs))));
2189 // TODO: Sadly, we pass HTLCs twice to ChannelMonitor: once via the HolderCommitmentTransaction and once via the update
2190 let mut htlcs_and_sigs = Vec::with_capacity(htlcs_cloned.len());
2191 for (idx, (htlc, source)) in htlcs_cloned.drain(..).enumerate() {
2192 if let Some(_) = htlc.transaction_output_index {
2193 let htlc_tx = self.build_htlc_transaction(&commitment_txid, &htlc, true, &keys, feerate_per_kw);
2194 let htlc_redeemscript = chan_utils::get_htlc_redeemscript(&htlc, &keys);
2195 let htlc_sighash = hash_to_message!(&bip143::SigHashCache::new(&htlc_tx).signature_hash(0, &htlc_redeemscript, htlc.amount_msat / 1000, SigHashType::All)[..]);
2196 log_trace!(logger, "Checking HTLC tx signature {} by key {} against tx {} (sighash {}) with redeemscript {}", log_bytes!(msg.htlc_signatures[idx].serialize_compact()[..]), log_bytes!(keys.countersignatory_htlc_key.serialize()), encode::serialize_hex(&htlc_tx), log_bytes!(htlc_sighash[..]), encode::serialize_hex(&htlc_redeemscript));
2197 if let Err(_) = self.secp_ctx.verify(&htlc_sighash, &msg.htlc_signatures[idx], &keys.countersignatory_htlc_key) {
2198 return Err((None, ChannelError::Close("Invalid HTLC tx signature from peer".to_owned())));
2200 htlcs_and_sigs.push((htlc, Some(msg.htlc_signatures[idx]), source));
2202 htlcs_and_sigs.push((htlc, None, source));
2206 let holder_commitment_tx = HolderCommitmentTransaction::new(
2209 msg.htlc_signatures.clone(),
2210 &self.get_holder_pubkeys().funding_pubkey,
2211 self.counterparty_funding_pubkey()
2214 let next_per_commitment_point = self.holder_signer.get_per_commitment_point(self.cur_holder_commitment_transaction_number - 1, &self.secp_ctx);
2215 let per_commitment_secret = self.holder_signer.release_commitment_secret(self.cur_holder_commitment_transaction_number + 1);
2217 // Update state now that we've passed all the can-fail calls...
2218 let mut need_commitment = false;
2219 if !self.is_outbound() {
2220 if let Some(fee_update) = self.pending_update_fee {
2221 self.feerate_per_kw = fee_update;
2222 // We later use the presence of pending_update_fee to indicate we should generate a
2223 // commitment_signed upon receipt of revoke_and_ack, so we can only set it to None
2224 // if we're not awaiting a revoke (ie will send a commitment_signed now).
2225 if (self.channel_state & ChannelState::AwaitingRemoteRevoke as u32) == 0 {
2226 need_commitment = true;
2227 self.pending_update_fee = None;
2232 self.latest_monitor_update_id += 1;
2233 let mut monitor_update = ChannelMonitorUpdate {
2234 update_id: self.latest_monitor_update_id,
2235 updates: vec![ChannelMonitorUpdateStep::LatestHolderCommitmentTXInfo {
2236 commitment_tx: holder_commitment_tx,
2237 htlc_outputs: htlcs_and_sigs
2241 for htlc in self.pending_inbound_htlcs.iter_mut() {
2242 let new_forward = if let &InboundHTLCState::RemoteAnnounced(ref forward_info) = &htlc.state {
2243 Some(forward_info.clone())
2245 if let Some(forward_info) = new_forward {
2246 htlc.state = InboundHTLCState::AwaitingRemoteRevokeToAnnounce(forward_info);
2247 need_commitment = true;
2250 for htlc in self.pending_outbound_htlcs.iter_mut() {
2251 if let Some(fail_reason) = if let &mut OutboundHTLCState::RemoteRemoved(ref mut fail_reason) = &mut htlc.state {
2252 Some(fail_reason.take())
2254 htlc.state = OutboundHTLCState::AwaitingRemoteRevokeToRemove(fail_reason);
2255 need_commitment = true;
2259 self.cur_holder_commitment_transaction_number -= 1;
2260 // Note that if we need_commitment & !AwaitingRemoteRevoke we'll call
2261 // send_commitment_no_status_check() next which will reset this to RAAFirst.
2262 self.resend_order = RAACommitmentOrder::CommitmentFirst;
2264 if (self.channel_state & ChannelState::MonitorUpdateFailed as u32) != 0 {
2265 // In case we initially failed monitor updating without requiring a response, we need
2266 // to make sure the RAA gets sent first.
2267 self.monitor_pending_revoke_and_ack = true;
2268 if need_commitment && (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32)) == 0 {
2269 // If we were going to send a commitment_signed after the RAA, go ahead and do all
2270 // the corresponding HTLC status updates so that get_last_commitment_update
2271 // includes the right HTLCs.
2272 self.monitor_pending_commitment_signed = true;
2273 let (_, mut additional_update) = self.send_commitment_no_status_check(logger).map_err(|e| (None, e))?;
2274 // send_commitment_no_status_check may bump latest_monitor_id but we want them to be
2275 // strictly increasing by one, so decrement it here.
2276 self.latest_monitor_update_id = monitor_update.update_id;
2277 monitor_update.updates.append(&mut additional_update.updates);
2279 // TODO: Call maybe_propose_first_closing_signed on restoration (or call it here and
2280 // re-send the message on restoration)
2281 return Err((Some(monitor_update), ChannelError::Ignore("Previous monitor update failure prevented generation of RAA".to_owned())));
2284 let (commitment_signed, closing_signed) = if need_commitment && (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32)) == 0 {
2285 // If we're AwaitingRemoteRevoke we can't send a new commitment here, but that's ok -
2286 // we'll send one right away when we get the revoke_and_ack when we
2287 // free_holding_cell_htlcs().
2288 let (msg, mut additional_update) = self.send_commitment_no_status_check(logger).map_err(|e| (None, e))?;
2289 // send_commitment_no_status_check may bump latest_monitor_id but we want them to be
2290 // strictly increasing by one, so decrement it here.
2291 self.latest_monitor_update_id = monitor_update.update_id;
2292 monitor_update.updates.append(&mut additional_update.updates);
2294 } else if !need_commitment {
2295 (None, self.maybe_propose_first_closing_signed(fee_estimator))
2296 } else { (None, None) };
2298 Ok((msgs::RevokeAndACK {
2299 channel_id: self.channel_id,
2300 per_commitment_secret,
2301 next_per_commitment_point,
2302 }, commitment_signed, closing_signed, monitor_update))
2305 /// Used to fulfill holding_cell_htlcs when we get a remote ack (or implicitly get it by them
2306 /// fulfilling or failing the last pending HTLC)
2307 fn free_holding_cell_htlcs<L: Deref>(&mut self, logger: &L) -> Result<(Option<(msgs::CommitmentUpdate, ChannelMonitorUpdate)>, Vec<(HTLCSource, PaymentHash)>), ChannelError> where L::Target: Logger {
2308 assert_eq!(self.channel_state & ChannelState::MonitorUpdateFailed as u32, 0);
2309 if self.holding_cell_htlc_updates.len() != 0 || self.holding_cell_update_fee.is_some() {
2310 log_trace!(logger, "Freeing holding cell with {} HTLC updates{}", self.holding_cell_htlc_updates.len(), if self.holding_cell_update_fee.is_some() { " and a fee update" } else { "" });
2312 let mut monitor_update = ChannelMonitorUpdate {
2313 update_id: self.latest_monitor_update_id + 1, // We don't increment this yet!
2314 updates: Vec::new(),
2317 let mut htlc_updates = Vec::new();
2318 mem::swap(&mut htlc_updates, &mut self.holding_cell_htlc_updates);
2319 let mut update_add_htlcs = Vec::with_capacity(htlc_updates.len());
2320 let mut update_fulfill_htlcs = Vec::with_capacity(htlc_updates.len());
2321 let mut update_fail_htlcs = Vec::with_capacity(htlc_updates.len());
2322 let mut htlcs_to_fail = Vec::new();
2323 for htlc_update in htlc_updates.drain(..) {
2324 // Note that this *can* fail, though it should be due to rather-rare conditions on
2325 // fee races with adding too many outputs which push our total payments just over
2326 // the limit. In case it's less rare than I anticipate, we may want to revisit
2327 // handling this case better and maybe fulfilling some of the HTLCs while attempting
2328 // to rebalance channels.
2329 match &htlc_update {
2330 &HTLCUpdateAwaitingACK::AddHTLC {amount_msat, cltv_expiry, ref payment_hash, ref source, ref onion_routing_packet, ..} => {
2331 match self.send_htlc(amount_msat, *payment_hash, cltv_expiry, source.clone(), onion_routing_packet.clone()) {
2332 Ok(update_add_msg_option) => update_add_htlcs.push(update_add_msg_option.unwrap()),
2335 ChannelError::Ignore(ref msg) => {
2336 log_info!(logger, "Failed to send HTLC with payment_hash {} due to {}", log_bytes!(payment_hash.0), msg);
2337 // If we fail to send here, then this HTLC should
2338 // be failed backwards. Failing to send here
2339 // indicates that this HTLC may keep being put back
2340 // into the holding cell without ever being
2341 // successfully forwarded/failed/fulfilled, causing
2342 // our counterparty to eventually close on us.
2343 htlcs_to_fail.push((source.clone(), *payment_hash));
2346 panic!("Got a non-IgnoreError action trying to send holding cell HTLC");
2352 &HTLCUpdateAwaitingACK::ClaimHTLC { ref payment_preimage, htlc_id, .. } => {
2353 match self.get_update_fulfill_htlc(htlc_id, *payment_preimage, logger) {
2354 Ok((update_fulfill_msg_option, additional_monitor_update_opt)) => {
2355 update_fulfill_htlcs.push(update_fulfill_msg_option.unwrap());
2356 if let Some(mut additional_monitor_update) = additional_monitor_update_opt {
2357 monitor_update.updates.append(&mut additional_monitor_update.updates);
2361 if let ChannelError::Ignore(_) = e {}
2363 panic!("Got a non-IgnoreError action trying to fulfill holding cell HTLC");
2368 &HTLCUpdateAwaitingACK::FailHTLC { htlc_id, ref err_packet } => {
2369 match self.get_update_fail_htlc(htlc_id, err_packet.clone()) {
2370 Ok(update_fail_msg_option) => update_fail_htlcs.push(update_fail_msg_option.unwrap()),
2372 if let ChannelError::Ignore(_) = e {}
2374 panic!("Got a non-IgnoreError action trying to fail holding cell HTLC");
2381 if update_add_htlcs.is_empty() && update_fulfill_htlcs.is_empty() && update_fail_htlcs.is_empty() && self.holding_cell_update_fee.is_none() {
2382 return Ok((None, htlcs_to_fail));
2384 let update_fee = if let Some(feerate) = self.holding_cell_update_fee {
2385 self.pending_update_fee = self.holding_cell_update_fee.take();
2386 Some(msgs::UpdateFee {
2387 channel_id: self.channel_id,
2388 feerate_per_kw: feerate as u32,
2394 let (commitment_signed, mut additional_update) = self.send_commitment_no_status_check(logger)?;
2395 // send_commitment_no_status_check and get_update_fulfill_htlc may bump latest_monitor_id
2396 // but we want them to be strictly increasing by one, so reset it here.
2397 self.latest_monitor_update_id = monitor_update.update_id;
2398 monitor_update.updates.append(&mut additional_update.updates);
2400 Ok((Some((msgs::CommitmentUpdate {
2402 update_fulfill_htlcs,
2404 update_fail_malformed_htlcs: Vec::new(),
2407 }, monitor_update)), htlcs_to_fail))
2409 Ok((None, Vec::new()))
2413 /// Handles receiving a remote's revoke_and_ack. Note that we may return a new
2414 /// commitment_signed message here in case we had pending outbound HTLCs to add which were
2415 /// waiting on this revoke_and_ack. The generation of this new commitment_signed may also fail,
2416 /// generating an appropriate error *after* the channel state has been updated based on the
2417 /// revoke_and_ack message.
2418 pub fn revoke_and_ack<F: Deref, L: Deref>(&mut self, msg: &msgs::RevokeAndACK, fee_estimator: &F, logger: &L) -> Result<(Option<msgs::CommitmentUpdate>, Vec<(PendingHTLCInfo, u64)>, Vec<(HTLCSource, PaymentHash, HTLCFailReason)>, Option<msgs::ClosingSigned>, ChannelMonitorUpdate, Vec<(HTLCSource, PaymentHash)>), ChannelError>
2419 where F::Target: FeeEstimator,
2422 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
2423 return Err(ChannelError::Close("Got revoke/ACK message when channel was not in an operational state".to_owned()));
2425 if self.channel_state & (ChannelState::PeerDisconnected as u32) == ChannelState::PeerDisconnected as u32 {
2426 return Err(ChannelError::Close("Peer sent revoke_and_ack when we needed a channel_reestablish".to_owned()));
2428 if self.channel_state & BOTH_SIDES_SHUTDOWN_MASK == BOTH_SIDES_SHUTDOWN_MASK && self.last_sent_closing_fee.is_some() {
2429 return Err(ChannelError::Close("Peer sent revoke_and_ack after we'd started exchanging closing_signeds".to_owned()));
2432 if let Some(counterparty_prev_commitment_point) = self.counterparty_prev_commitment_point {
2433 if PublicKey::from_secret_key(&self.secp_ctx, &secp_check!(SecretKey::from_slice(&msg.per_commitment_secret), "Peer provided an invalid per_commitment_secret".to_owned())) != counterparty_prev_commitment_point {
2434 return Err(ChannelError::Close("Got a revoke commitment secret which didn't correspond to their current pubkey".to_owned()));
2438 if self.channel_state & ChannelState::AwaitingRemoteRevoke as u32 == 0 {
2439 // Our counterparty seems to have burned their coins to us (by revoking a state when we
2440 // haven't given them a new commitment transaction to broadcast). We should probably
2441 // take advantage of this by updating our channel monitor, sending them an error, and
2442 // waiting for them to broadcast their latest (now-revoked claim). But, that would be a
2443 // lot of work, and there's some chance this is all a misunderstanding anyway.
2444 // We have to do *something*, though, since our signer may get mad at us for otherwise
2445 // jumping a remote commitment number, so best to just force-close and move on.
2446 return Err(ChannelError::Close("Received an unexpected revoke_and_ack".to_owned()));
2449 #[cfg(any(test, feature = "fuzztarget"))]
2451 *self.next_local_commitment_tx_fee_info_cached.lock().unwrap() = None;
2452 *self.next_remote_commitment_tx_fee_info_cached.lock().unwrap() = None;
2455 self.commitment_secrets.provide_secret(self.cur_counterparty_commitment_transaction_number + 1, msg.per_commitment_secret)
2456 .map_err(|_| ChannelError::Close("Previous secrets did not match new one".to_owned()))?;
2457 self.latest_monitor_update_id += 1;
2458 let mut monitor_update = ChannelMonitorUpdate {
2459 update_id: self.latest_monitor_update_id,
2460 updates: vec![ChannelMonitorUpdateStep::CommitmentSecret {
2461 idx: self.cur_counterparty_commitment_transaction_number + 1,
2462 secret: msg.per_commitment_secret,
2466 // Update state now that we've passed all the can-fail calls...
2467 // (note that we may still fail to generate the new commitment_signed message, but that's
2468 // OK, we step the channel here and *then* if the new generation fails we can fail the
2469 // channel based on that, but stepping stuff here should be safe either way.
2470 self.channel_state &= !(ChannelState::AwaitingRemoteRevoke as u32);
2471 self.counterparty_prev_commitment_point = self.counterparty_cur_commitment_point;
2472 self.counterparty_cur_commitment_point = Some(msg.next_per_commitment_point);
2473 self.cur_counterparty_commitment_transaction_number -= 1;
2475 log_trace!(logger, "Updating HTLCs on receipt of RAA...");
2476 let mut to_forward_infos = Vec::new();
2477 let mut revoked_htlcs = Vec::new();
2478 let mut update_fail_htlcs = Vec::new();
2479 let mut update_fail_malformed_htlcs = Vec::new();
2480 let mut require_commitment = false;
2481 let mut value_to_self_msat_diff: i64 = 0;
2484 // Take references explicitly so that we can hold multiple references to self.
2485 let pending_inbound_htlcs: &mut Vec<_> = &mut self.pending_inbound_htlcs;
2486 let pending_outbound_htlcs: &mut Vec<_> = &mut self.pending_outbound_htlcs;
2488 // We really shouldnt have two passes here, but retain gives a non-mutable ref (Rust bug)
2489 pending_inbound_htlcs.retain(|htlc| {
2490 if let &InboundHTLCState::LocalRemoved(ref reason) = &htlc.state {
2491 log_trace!(logger, " ...removing inbound LocalRemoved {}", log_bytes!(htlc.payment_hash.0));
2492 if let &InboundHTLCRemovalReason::Fulfill(_) = reason {
2493 value_to_self_msat_diff += htlc.amount_msat as i64;
2498 pending_outbound_htlcs.retain(|htlc| {
2499 if let &OutboundHTLCState::AwaitingRemovedRemoteRevoke(ref fail_reason) = &htlc.state {
2500 log_trace!(logger, " ...removing outbound AwaitingRemovedRemoteRevoke {}", log_bytes!(htlc.payment_hash.0));
2501 if let Some(reason) = fail_reason.clone() { // We really want take() here, but, again, non-mut ref :(
2502 revoked_htlcs.push((htlc.source.clone(), htlc.payment_hash, reason));
2504 // They fulfilled, so we sent them money
2505 value_to_self_msat_diff -= htlc.amount_msat as i64;
2510 for htlc in pending_inbound_htlcs.iter_mut() {
2511 let swap = if let &InboundHTLCState::AwaitingRemoteRevokeToAnnounce(_) = &htlc.state {
2512 log_trace!(logger, " ...promoting inbound AwaitingRemoteRevokeToAnnounce {} to Committed", log_bytes!(htlc.payment_hash.0));
2514 } else if let &InboundHTLCState::AwaitingAnnouncedRemoteRevoke(_) = &htlc.state {
2515 log_trace!(logger, " ...promoting inbound AwaitingAnnouncedRemoteRevoke {} to Committed", log_bytes!(htlc.payment_hash.0));
2519 let mut state = InboundHTLCState::Committed;
2520 mem::swap(&mut state, &mut htlc.state);
2522 if let InboundHTLCState::AwaitingRemoteRevokeToAnnounce(forward_info) = state {
2523 htlc.state = InboundHTLCState::AwaitingAnnouncedRemoteRevoke(forward_info);
2524 require_commitment = true;
2525 } else if let InboundHTLCState::AwaitingAnnouncedRemoteRevoke(forward_info) = state {
2526 match forward_info {
2527 PendingHTLCStatus::Fail(fail_msg) => {
2528 require_commitment = true;
2530 HTLCFailureMsg::Relay(msg) => {
2531 htlc.state = InboundHTLCState::LocalRemoved(InboundHTLCRemovalReason::FailRelay(msg.reason.clone()));
2532 update_fail_htlcs.push(msg)
2534 HTLCFailureMsg::Malformed(msg) => {
2535 htlc.state = InboundHTLCState::LocalRemoved(InboundHTLCRemovalReason::FailMalformed((msg.sha256_of_onion, msg.failure_code)));
2536 update_fail_malformed_htlcs.push(msg)
2540 PendingHTLCStatus::Forward(forward_info) => {
2541 to_forward_infos.push((forward_info, htlc.htlc_id));
2542 htlc.state = InboundHTLCState::Committed;
2548 for htlc in pending_outbound_htlcs.iter_mut() {
2549 if let OutboundHTLCState::LocalAnnounced(_) = htlc.state {
2550 log_trace!(logger, " ...promoting outbound LocalAnnounced {} to Committed", log_bytes!(htlc.payment_hash.0));
2551 htlc.state = OutboundHTLCState::Committed;
2553 if let Some(fail_reason) = if let &mut OutboundHTLCState::AwaitingRemoteRevokeToRemove(ref mut fail_reason) = &mut htlc.state {
2554 Some(fail_reason.take())
2556 log_trace!(logger, " ...promoting outbound AwaitingRemoteRevokeToRemove {} to AwaitingRemovedRemoteRevoke", log_bytes!(htlc.payment_hash.0));
2557 htlc.state = OutboundHTLCState::AwaitingRemovedRemoteRevoke(fail_reason);
2558 require_commitment = true;
2562 self.value_to_self_msat = (self.value_to_self_msat as i64 + value_to_self_msat_diff) as u64;
2564 if self.is_outbound() {
2565 if let Some(feerate) = self.pending_update_fee.take() {
2566 self.feerate_per_kw = feerate;
2569 if let Some(feerate) = self.pending_update_fee {
2570 // Because a node cannot send two commitment_signeds in a row without getting a
2571 // revoke_and_ack from us (as it would otherwise not know the per_commitment_point
2572 // it should use to create keys with) and because a node can't send a
2573 // commitment_signed without changes, checking if the feerate is equal to the
2574 // pending feerate update is sufficient to detect require_commitment.
2575 if feerate == self.feerate_per_kw {
2576 require_commitment = true;
2577 self.pending_update_fee = None;
2582 if (self.channel_state & ChannelState::MonitorUpdateFailed as u32) == ChannelState::MonitorUpdateFailed as u32 {
2583 // We can't actually generate a new commitment transaction (incl by freeing holding
2584 // cells) while we can't update the monitor, so we just return what we have.
2585 if require_commitment {
2586 self.monitor_pending_commitment_signed = true;
2587 // When the monitor updating is restored we'll call get_last_commitment_update(),
2588 // which does not update state, but we're definitely now awaiting a remote revoke
2589 // before we can step forward any more, so set it here.
2590 let (_, mut additional_update) = self.send_commitment_no_status_check(logger)?;
2591 // send_commitment_no_status_check may bump latest_monitor_id but we want them to be
2592 // strictly increasing by one, so decrement it here.
2593 self.latest_monitor_update_id = monitor_update.update_id;
2594 monitor_update.updates.append(&mut additional_update.updates);
2596 self.monitor_pending_forwards.append(&mut to_forward_infos);
2597 self.monitor_pending_failures.append(&mut revoked_htlcs);
2598 return Ok((None, Vec::new(), Vec::new(), None, monitor_update, Vec::new()))
2601 match self.free_holding_cell_htlcs(logger)? {
2602 (Some((mut commitment_update, mut additional_update)), htlcs_to_fail) => {
2603 commitment_update.update_fail_htlcs.reserve(update_fail_htlcs.len());
2604 for fail_msg in update_fail_htlcs.drain(..) {
2605 commitment_update.update_fail_htlcs.push(fail_msg);
2607 commitment_update.update_fail_malformed_htlcs.reserve(update_fail_malformed_htlcs.len());
2608 for fail_msg in update_fail_malformed_htlcs.drain(..) {
2609 commitment_update.update_fail_malformed_htlcs.push(fail_msg);
2612 // free_holding_cell_htlcs may bump latest_monitor_id multiple times but we want them to be
2613 // strictly increasing by one, so decrement it here.
2614 self.latest_monitor_update_id = monitor_update.update_id;
2615 monitor_update.updates.append(&mut additional_update.updates);
2617 Ok((Some(commitment_update), to_forward_infos, revoked_htlcs, None, monitor_update, htlcs_to_fail))
2619 (None, htlcs_to_fail) => {
2620 if require_commitment {
2621 let (commitment_signed, mut additional_update) = self.send_commitment_no_status_check(logger)?;
2623 // send_commitment_no_status_check may bump latest_monitor_id but we want them to be
2624 // strictly increasing by one, so decrement it here.
2625 self.latest_monitor_update_id = monitor_update.update_id;
2626 monitor_update.updates.append(&mut additional_update.updates);
2628 Ok((Some(msgs::CommitmentUpdate {
2629 update_add_htlcs: Vec::new(),
2630 update_fulfill_htlcs: Vec::new(),
2632 update_fail_malformed_htlcs,
2635 }), to_forward_infos, revoked_htlcs, None, monitor_update, htlcs_to_fail))
2637 Ok((None, to_forward_infos, revoked_htlcs, self.maybe_propose_first_closing_signed(fee_estimator), monitor_update, htlcs_to_fail))
2644 /// Adds a pending update to this channel. See the doc for send_htlc for
2645 /// further details on the optionness of the return value.
2646 /// You MUST call send_commitment prior to any other calls on this Channel
2647 fn send_update_fee(&mut self, feerate_per_kw: u32) -> Option<msgs::UpdateFee> {
2648 if !self.is_outbound() {
2649 panic!("Cannot send fee from inbound channel");
2651 if !self.is_usable() {
2652 panic!("Cannot update fee until channel is fully established and we haven't started shutting down");
2654 if !self.is_live() {
2655 panic!("Cannot update fee while peer is disconnected/we're awaiting a monitor update (ChannelManager should have caught this)");
2658 if (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32)) == (ChannelState::AwaitingRemoteRevoke as u32) {
2659 self.holding_cell_update_fee = Some(feerate_per_kw);
2663 debug_assert!(self.pending_update_fee.is_none());
2664 self.pending_update_fee = Some(feerate_per_kw);
2666 Some(msgs::UpdateFee {
2667 channel_id: self.channel_id,
2672 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 {
2673 match self.send_update_fee(feerate_per_kw) {
2674 Some(update_fee) => {
2675 let (commitment_signed, monitor_update) = self.send_commitment_no_status_check(logger)?;
2676 Ok(Some((update_fee, commitment_signed, monitor_update)))
2682 /// Removes any uncommitted HTLCs, to be used on peer disconnection, including any pending
2683 /// HTLCs that we intended to add but haven't as we were waiting on a remote revoke.
2684 /// Returns the set of PendingHTLCStatuses from remote uncommitted HTLCs (which we're
2685 /// implicitly dropping) and the payment_hashes of HTLCs we tried to add but are dropping.
2686 /// No further message handling calls may be made until a channel_reestablish dance has
2688 pub fn remove_uncommitted_htlcs_and_mark_paused<L: Deref>(&mut self, logger: &L) -> Vec<(HTLCSource, PaymentHash)> where L::Target: Logger {
2689 let mut outbound_drops = Vec::new();
2691 assert_eq!(self.channel_state & ChannelState::ShutdownComplete as u32, 0);
2692 if self.channel_state < ChannelState::FundingSent as u32 {
2693 self.channel_state = ChannelState::ShutdownComplete as u32;
2694 return outbound_drops;
2696 // Upon reconnect we have to start the closing_signed dance over, but shutdown messages
2697 // will be retransmitted.
2698 self.last_sent_closing_fee = None;
2700 let mut inbound_drop_count = 0;
2701 self.pending_inbound_htlcs.retain(|htlc| {
2703 InboundHTLCState::RemoteAnnounced(_) => {
2704 // They sent us an update_add_htlc but we never got the commitment_signed.
2705 // We'll tell them what commitment_signed we're expecting next and they'll drop
2706 // this HTLC accordingly
2707 inbound_drop_count += 1;
2710 InboundHTLCState::AwaitingRemoteRevokeToAnnounce(_)|InboundHTLCState::AwaitingAnnouncedRemoteRevoke(_) => {
2711 // We received a commitment_signed updating this HTLC and (at least hopefully)
2712 // sent a revoke_and_ack (which we can re-transmit) and have heard nothing
2713 // in response to it yet, so don't touch it.
2716 InboundHTLCState::Committed => true,
2717 InboundHTLCState::LocalRemoved(_) => {
2718 // We (hopefully) sent a commitment_signed updating this HTLC (which we can
2719 // re-transmit if needed) and they may have even sent a revoke_and_ack back
2720 // (that we missed). Keep this around for now and if they tell us they missed
2721 // the commitment_signed we can re-transmit the update then.
2726 self.next_counterparty_htlc_id -= inbound_drop_count;
2728 for htlc in self.pending_outbound_htlcs.iter_mut() {
2729 if let OutboundHTLCState::RemoteRemoved(_) = htlc.state {
2730 // They sent us an update to remove this but haven't yet sent the corresponding
2731 // commitment_signed, we need to move it back to Committed and they can re-send
2732 // the update upon reconnection.
2733 htlc.state = OutboundHTLCState::Committed;
2737 self.holding_cell_htlc_updates.retain(|htlc_update| {
2739 // Note that currently on channel reestablish we assert that there are
2740 // no holding cell HTLC update_adds, so if in the future we stop
2741 // dropping added HTLCs here and failing them backwards, then there will
2742 // need to be corresponding changes made in the Channel's re-establish
2744 &HTLCUpdateAwaitingACK::AddHTLC { ref payment_hash, ref source, .. } => {
2745 outbound_drops.push((source.clone(), payment_hash.clone()));
2748 &HTLCUpdateAwaitingACK::ClaimHTLC {..} | &HTLCUpdateAwaitingACK::FailHTLC {..} => true,
2751 self.channel_state |= ChannelState::PeerDisconnected as u32;
2752 log_debug!(logger, "Peer disconnection resulted in {} remote-announced HTLC drops and {} waiting-to-locally-announced HTLC drops on channel {}", outbound_drops.len(), inbound_drop_count, log_bytes!(self.channel_id()));
2756 /// Indicates that a ChannelMonitor update failed to be stored by the client and further
2757 /// updates are partially paused.
2758 /// This must be called immediately after the call which generated the ChannelMonitor update
2759 /// which failed. The messages which were generated from that call which generated the
2760 /// monitor update failure must *not* have been sent to the remote end, and must instead
2761 /// have been dropped. They will be regenerated when monitor_updating_restored is called.
2762 pub fn monitor_update_failed(&mut self, resend_raa: bool, resend_commitment: bool, mut pending_forwards: Vec<(PendingHTLCInfo, u64)>, mut pending_fails: Vec<(HTLCSource, PaymentHash, HTLCFailReason)>) {
2763 assert_eq!(self.channel_state & ChannelState::MonitorUpdateFailed as u32, 0);
2764 self.monitor_pending_revoke_and_ack = resend_raa;
2765 self.monitor_pending_commitment_signed = resend_commitment;
2766 assert!(self.monitor_pending_forwards.is_empty());
2767 mem::swap(&mut pending_forwards, &mut self.monitor_pending_forwards);
2768 assert!(self.monitor_pending_failures.is_empty());
2769 mem::swap(&mut pending_fails, &mut self.monitor_pending_failures);
2770 self.channel_state |= ChannelState::MonitorUpdateFailed as u32;
2773 /// Indicates that the latest ChannelMonitor update has been committed by the client
2774 /// successfully and we should restore normal operation. Returns messages which should be sent
2775 /// to the remote side.
2776 pub fn monitor_updating_restored<L: Deref>(&mut self, logger: &L) -> (Option<msgs::RevokeAndACK>, Option<msgs::CommitmentUpdate>, RAACommitmentOrder, Vec<(PendingHTLCInfo, u64)>, Vec<(HTLCSource, PaymentHash, HTLCFailReason)>, Option<Transaction>, Option<msgs::FundingLocked>) where L::Target: Logger {
2777 assert_eq!(self.channel_state & ChannelState::MonitorUpdateFailed as u32, ChannelState::MonitorUpdateFailed as u32);
2778 self.channel_state &= !(ChannelState::MonitorUpdateFailed as u32);
2780 let funding_broadcastable = if self.channel_state & (ChannelState::FundingSent as u32) != 0 && self.is_outbound() {
2781 self.funding_transaction.take()
2784 // We will never broadcast the funding transaction when we're in MonitorUpdateFailed (and
2785 // we assume the user never directly broadcasts the funding transaction and waits for us to
2786 // do it). Thus, we can only ever hit monitor_pending_funding_locked when we're an inbound
2787 // channel which failed to persist the monitor on funding_created, and we got the funding
2788 // transaction confirmed before the monitor was persisted.
2789 let funding_locked = if self.monitor_pending_funding_locked {
2790 assert!(!self.is_outbound(), "Funding transaction broadcast by the local client before it should have - LDK didn't do it!");
2791 self.monitor_pending_funding_locked = false;
2792 let next_per_commitment_point = self.holder_signer.get_per_commitment_point(self.cur_holder_commitment_transaction_number, &self.secp_ctx);
2793 Some(msgs::FundingLocked {
2794 channel_id: self.channel_id(),
2795 next_per_commitment_point,
2799 let mut forwards = Vec::new();
2800 mem::swap(&mut forwards, &mut self.monitor_pending_forwards);
2801 let mut failures = Vec::new();
2802 mem::swap(&mut failures, &mut self.monitor_pending_failures);
2804 if self.channel_state & (ChannelState::PeerDisconnected as u32) != 0 {
2805 self.monitor_pending_revoke_and_ack = false;
2806 self.monitor_pending_commitment_signed = false;
2807 return (None, None, RAACommitmentOrder::RevokeAndACKFirst, forwards, failures, funding_broadcastable, funding_locked);
2810 let raa = if self.monitor_pending_revoke_and_ack {
2811 Some(self.get_last_revoke_and_ack())
2813 let commitment_update = if self.monitor_pending_commitment_signed {
2814 Some(self.get_last_commitment_update(logger))
2817 self.monitor_pending_revoke_and_ack = false;
2818 self.monitor_pending_commitment_signed = false;
2819 let order = self.resend_order.clone();
2820 log_trace!(logger, "Restored monitor updating resulting in {}{} commitment update and {} RAA, with {} first",
2821 if funding_broadcastable.is_some() { "a funding broadcastable, " } else { "" },
2822 if commitment_update.is_some() { "a" } else { "no" },
2823 if raa.is_some() { "an" } else { "no" },
2824 match order { RAACommitmentOrder::CommitmentFirst => "commitment", RAACommitmentOrder::RevokeAndACKFirst => "RAA"});
2825 (raa, commitment_update, order, forwards, failures, funding_broadcastable, funding_locked)
2828 pub fn update_fee<F: Deref>(&mut self, fee_estimator: &F, msg: &msgs::UpdateFee) -> Result<(), ChannelError>
2829 where F::Target: FeeEstimator
2831 if self.is_outbound() {
2832 return Err(ChannelError::Close("Non-funding remote tried to update channel fee".to_owned()));
2834 if self.channel_state & (ChannelState::PeerDisconnected as u32) == ChannelState::PeerDisconnected as u32 {
2835 return Err(ChannelError::Close("Peer sent update_fee when we needed a channel_reestablish".to_owned()));
2837 Channel::<Signer>::check_remote_fee(fee_estimator, msg.feerate_per_kw)?;
2838 self.pending_update_fee = Some(msg.feerate_per_kw);
2839 self.update_time_counter += 1;
2843 fn get_last_revoke_and_ack(&self) -> msgs::RevokeAndACK {
2844 let next_per_commitment_point = self.holder_signer.get_per_commitment_point(self.cur_holder_commitment_transaction_number, &self.secp_ctx);
2845 let per_commitment_secret = self.holder_signer.release_commitment_secret(self.cur_holder_commitment_transaction_number + 2);
2846 msgs::RevokeAndACK {
2847 channel_id: self.channel_id,
2848 per_commitment_secret,
2849 next_per_commitment_point,
2853 fn get_last_commitment_update<L: Deref>(&self, logger: &L) -> msgs::CommitmentUpdate where L::Target: Logger {
2854 let mut update_add_htlcs = Vec::new();
2855 let mut update_fulfill_htlcs = Vec::new();
2856 let mut update_fail_htlcs = Vec::new();
2857 let mut update_fail_malformed_htlcs = Vec::new();
2859 for htlc in self.pending_outbound_htlcs.iter() {
2860 if let &OutboundHTLCState::LocalAnnounced(ref onion_packet) = &htlc.state {
2861 update_add_htlcs.push(msgs::UpdateAddHTLC {
2862 channel_id: self.channel_id(),
2863 htlc_id: htlc.htlc_id,
2864 amount_msat: htlc.amount_msat,
2865 payment_hash: htlc.payment_hash,
2866 cltv_expiry: htlc.cltv_expiry,
2867 onion_routing_packet: (**onion_packet).clone(),
2872 for htlc in self.pending_inbound_htlcs.iter() {
2873 if let &InboundHTLCState::LocalRemoved(ref reason) = &htlc.state {
2875 &InboundHTLCRemovalReason::FailRelay(ref err_packet) => {
2876 update_fail_htlcs.push(msgs::UpdateFailHTLC {
2877 channel_id: self.channel_id(),
2878 htlc_id: htlc.htlc_id,
2879 reason: err_packet.clone()
2882 &InboundHTLCRemovalReason::FailMalformed((ref sha256_of_onion, ref failure_code)) => {
2883 update_fail_malformed_htlcs.push(msgs::UpdateFailMalformedHTLC {
2884 channel_id: self.channel_id(),
2885 htlc_id: htlc.htlc_id,
2886 sha256_of_onion: sha256_of_onion.clone(),
2887 failure_code: failure_code.clone(),
2890 &InboundHTLCRemovalReason::Fulfill(ref payment_preimage) => {
2891 update_fulfill_htlcs.push(msgs::UpdateFulfillHTLC {
2892 channel_id: self.channel_id(),
2893 htlc_id: htlc.htlc_id,
2894 payment_preimage: payment_preimage.clone(),
2901 log_trace!(logger, "Regenerated latest commitment update with {} update_adds, {} update_fulfills, {} update_fails, and {} update_fail_malformeds",
2902 update_add_htlcs.len(), update_fulfill_htlcs.len(), update_fail_htlcs.len(), update_fail_malformed_htlcs.len());
2903 msgs::CommitmentUpdate {
2904 update_add_htlcs, update_fulfill_htlcs, update_fail_htlcs, update_fail_malformed_htlcs,
2906 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,
2910 /// May panic if some calls other than message-handling calls (which will all Err immediately)
2911 /// have been called between remove_uncommitted_htlcs_and_mark_paused and this call.
2912 pub fn channel_reestablish<L: Deref>(&mut self, msg: &msgs::ChannelReestablish, logger: &L) -> Result<(Option<msgs::FundingLocked>, Option<msgs::RevokeAndACK>, Option<msgs::CommitmentUpdate>, Option<ChannelMonitorUpdate>, RAACommitmentOrder, Option<msgs::Shutdown>), ChannelError> where L::Target: Logger {
2913 if self.channel_state & (ChannelState::PeerDisconnected as u32) == 0 {
2914 // While BOLT 2 doesn't indicate explicitly we should error this channel here, it
2915 // almost certainly indicates we are going to end up out-of-sync in some way, so we
2916 // just close here instead of trying to recover.
2917 return Err(ChannelError::Close("Peer sent a loose channel_reestablish not after reconnect".to_owned()));
2920 if msg.next_local_commitment_number >= INITIAL_COMMITMENT_NUMBER || msg.next_remote_commitment_number >= INITIAL_COMMITMENT_NUMBER ||
2921 msg.next_local_commitment_number == 0 {
2922 return Err(ChannelError::Close("Peer sent a garbage channel_reestablish".to_owned()));
2925 if msg.next_remote_commitment_number > 0 {
2926 match msg.data_loss_protect {
2927 OptionalField::Present(ref data_loss) => {
2928 let expected_point = self.holder_signer.get_per_commitment_point(INITIAL_COMMITMENT_NUMBER - msg.next_remote_commitment_number + 1, &self.secp_ctx);
2929 let given_secret = SecretKey::from_slice(&data_loss.your_last_per_commitment_secret)
2930 .map_err(|_| ChannelError::Close("Peer sent a garbage channel_reestablish with unparseable secret key".to_owned()))?;
2931 if expected_point != PublicKey::from_secret_key(&self.secp_ctx, &given_secret) {
2932 return Err(ChannelError::Close("Peer sent a garbage channel_reestablish with secret key not matching the commitment height provided".to_owned()));
2934 if msg.next_remote_commitment_number > INITIAL_COMMITMENT_NUMBER - self.cur_holder_commitment_transaction_number {
2935 return Err(ChannelError::CloseDelayBroadcast(
2936 "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()
2940 OptionalField::Absent => {}
2944 // Go ahead and unmark PeerDisconnected as various calls we may make check for it (and all
2945 // remaining cases either succeed or ErrorMessage-fail).
2946 self.channel_state &= !(ChannelState::PeerDisconnected as u32);
2948 let shutdown_msg = if self.channel_state & (ChannelState::LocalShutdownSent as u32) != 0 {
2949 Some(msgs::Shutdown {
2950 channel_id: self.channel_id,
2951 scriptpubkey: self.get_closing_scriptpubkey(),
2955 if self.channel_state & (ChannelState::FundingSent as u32) == ChannelState::FundingSent as u32 {
2956 // If we're waiting on a monitor update, we shouldn't re-send any funding_locked's.
2957 if self.channel_state & (ChannelState::OurFundingLocked as u32) == 0 ||
2958 self.channel_state & (ChannelState::MonitorUpdateFailed as u32) != 0 {
2959 if msg.next_remote_commitment_number != 0 {
2960 return Err(ChannelError::Close("Peer claimed they saw a revoke_and_ack but we haven't sent funding_locked yet".to_owned()));
2962 // Short circuit the whole handler as there is nothing we can resend them
2963 return Ok((None, None, None, None, RAACommitmentOrder::CommitmentFirst, shutdown_msg));
2966 // We have OurFundingLocked set!
2967 let next_per_commitment_point = self.holder_signer.get_per_commitment_point(self.cur_holder_commitment_transaction_number, &self.secp_ctx);
2968 return Ok((Some(msgs::FundingLocked {
2969 channel_id: self.channel_id(),
2970 next_per_commitment_point,
2971 }), None, None, None, RAACommitmentOrder::CommitmentFirst, shutdown_msg));
2974 let required_revoke = if msg.next_remote_commitment_number + 1 == INITIAL_COMMITMENT_NUMBER - self.cur_holder_commitment_transaction_number {
2975 // Remote isn't waiting on any RevokeAndACK from us!
2976 // Note that if we need to repeat our FundingLocked we'll do that in the next if block.
2978 } else if msg.next_remote_commitment_number + 1 == (INITIAL_COMMITMENT_NUMBER - 1) - self.cur_holder_commitment_transaction_number {
2979 if self.channel_state & (ChannelState::MonitorUpdateFailed as u32) != 0 {
2980 self.monitor_pending_revoke_and_ack = true;
2983 Some(self.get_last_revoke_and_ack())
2986 return Err(ChannelError::Close("Peer attempted to reestablish channel with a very old local commitment transaction".to_owned()));
2989 // We increment cur_counterparty_commitment_transaction_number only upon receipt of
2990 // revoke_and_ack, not on sending commitment_signed, so we add one if have
2991 // AwaitingRemoteRevoke set, which indicates we sent a commitment_signed but haven't gotten
2992 // the corresponding revoke_and_ack back yet.
2993 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 };
2995 let resend_funding_locked = if msg.next_local_commitment_number == 1 && INITIAL_COMMITMENT_NUMBER - self.cur_holder_commitment_transaction_number == 1 {
2996 // We should never have to worry about MonitorUpdateFailed resending FundingLocked
2997 let next_per_commitment_point = self.holder_signer.get_per_commitment_point(self.cur_holder_commitment_transaction_number, &self.secp_ctx);
2998 Some(msgs::FundingLocked {
2999 channel_id: self.channel_id(),
3000 next_per_commitment_point,
3004 if msg.next_local_commitment_number == next_counterparty_commitment_number {
3005 if required_revoke.is_some() {
3006 log_debug!(logger, "Reconnected channel {} with only lost outbound RAA", log_bytes!(self.channel_id()));
3008 log_debug!(logger, "Reconnected channel {} with no loss", log_bytes!(self.channel_id()));
3011 if (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32 | ChannelState::MonitorUpdateFailed as u32)) == 0 {
3012 // Note that if in the future we no longer drop holding cell update_adds on peer
3013 // disconnect, this logic will need to be updated.
3014 for htlc_update in self.holding_cell_htlc_updates.iter() {
3015 if let &HTLCUpdateAwaitingACK::AddHTLC { .. } = htlc_update {
3016 debug_assert!(false, "There shouldn't be any add-HTLCs in the holding cell now because they should have been dropped on peer disconnect. Panic here because said HTLCs won't be handled correctly.");
3020 // We're up-to-date and not waiting on a remote revoke (if we are our
3021 // channel_reestablish should result in them sending a revoke_and_ack), but we may
3022 // have received some updates while we were disconnected. Free the holding cell
3024 match self.free_holding_cell_htlcs(logger) {
3025 Err(ChannelError::Close(msg)) => return Err(ChannelError::Close(msg)),
3026 Err(ChannelError::Ignore(_)) | Err(ChannelError::CloseDelayBroadcast(_)) => panic!("Got non-channel-failing result from free_holding_cell_htlcs"),
3027 Ok((Some((commitment_update, monitor_update)), htlcs_to_fail)) => {
3028 // If in the future we no longer drop holding cell update_adds on peer
3029 // disconnect, we may be handed some HTLCs to fail backwards here.
3030 assert!(htlcs_to_fail.is_empty());
3031 return Ok((resend_funding_locked, required_revoke, Some(commitment_update), Some(monitor_update), self.resend_order.clone(), shutdown_msg));
3033 Ok((None, htlcs_to_fail)) => {
3034 // If in the future we no longer drop holding cell update_adds on peer
3035 // disconnect, we may be handed some HTLCs to fail backwards here.
3036 assert!(htlcs_to_fail.is_empty());
3037 return Ok((resend_funding_locked, required_revoke, None, None, self.resend_order.clone(), shutdown_msg));
3041 return Ok((resend_funding_locked, required_revoke, None, None, self.resend_order.clone(), shutdown_msg));
3043 } else if msg.next_local_commitment_number == next_counterparty_commitment_number - 1 {
3044 if required_revoke.is_some() {
3045 log_debug!(logger, "Reconnected channel {} with lost outbound RAA and lost remote commitment tx", log_bytes!(self.channel_id()));
3047 log_debug!(logger, "Reconnected channel {} with only lost remote commitment tx", log_bytes!(self.channel_id()));
3050 if self.channel_state & (ChannelState::MonitorUpdateFailed as u32) != 0 {
3051 self.monitor_pending_commitment_signed = true;
3052 return Ok((resend_funding_locked, None, None, None, self.resend_order.clone(), shutdown_msg));
3055 return Ok((resend_funding_locked, required_revoke, Some(self.get_last_commitment_update(logger)), None, self.resend_order.clone(), shutdown_msg));
3057 return Err(ChannelError::Close("Peer attempted to reestablish channel with a very old remote commitment transaction".to_owned()));
3061 fn maybe_propose_first_closing_signed<F: Deref>(&mut self, fee_estimator: &F) -> Option<msgs::ClosingSigned>
3062 where F::Target: FeeEstimator
3064 if !self.is_outbound() || !self.pending_inbound_htlcs.is_empty() || !self.pending_outbound_htlcs.is_empty() ||
3065 self.channel_state & (BOTH_SIDES_SHUTDOWN_MASK | ChannelState::AwaitingRemoteRevoke as u32) != BOTH_SIDES_SHUTDOWN_MASK ||
3066 self.last_sent_closing_fee.is_some() || self.pending_update_fee.is_some() {
3070 let mut proposed_feerate = fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Background);
3071 if self.feerate_per_kw > proposed_feerate {
3072 proposed_feerate = self.feerate_per_kw;
3074 let tx_weight = self.get_closing_transaction_weight(Some(&self.get_closing_scriptpubkey()), Some(self.counterparty_shutdown_scriptpubkey.as_ref().unwrap()));
3075 let proposed_total_fee_satoshis = proposed_feerate as u64 * tx_weight / 1000;
3077 let (closing_tx, total_fee_satoshis) = self.build_closing_transaction(proposed_total_fee_satoshis, false);
3078 let sig = self.holder_signer
3079 .sign_closing_transaction(&closing_tx, &self.secp_ctx)
3081 assert!(closing_tx.get_weight() as u64 <= tx_weight);
3082 if sig.is_none() { return None; }
3084 self.last_sent_closing_fee = Some((proposed_feerate, total_fee_satoshis, sig.clone().unwrap()));
3085 Some(msgs::ClosingSigned {
3086 channel_id: self.channel_id,
3087 fee_satoshis: total_fee_satoshis,
3088 signature: sig.unwrap(),
3092 pub fn shutdown<F: Deref>(&mut self, fee_estimator: &F, their_features: &InitFeatures, msg: &msgs::Shutdown) -> Result<(Option<msgs::Shutdown>, Option<msgs::ClosingSigned>, Vec<(HTLCSource, PaymentHash)>), ChannelError>
3093 where F::Target: FeeEstimator
3095 if self.channel_state & (ChannelState::PeerDisconnected as u32) == ChannelState::PeerDisconnected as u32 {
3096 return Err(ChannelError::Close("Peer sent shutdown when we needed a channel_reestablish".to_owned()));
3098 if self.channel_state < ChannelState::FundingSent as u32 {
3099 // Spec says we should fail the connection, not the channel, but that's nonsense, there
3100 // are plenty of reasons you may want to fail a channel pre-funding, and spec says you
3101 // can do that via error message without getting a connection fail anyway...
3102 return Err(ChannelError::Close("Peer sent shutdown pre-funding generation".to_owned()));
3104 for htlc in self.pending_inbound_htlcs.iter() {
3105 if let InboundHTLCState::RemoteAnnounced(_) = htlc.state {
3106 return Err(ChannelError::Close("Got shutdown with remote pending HTLCs".to_owned()));
3109 assert_eq!(self.channel_state & ChannelState::ShutdownComplete as u32, 0);
3111 if is_unsupported_shutdown_script(&their_features, &msg.scriptpubkey) {
3112 return Err(ChannelError::Close(format!("Got a nonstandard scriptpubkey ({}) from remote peer", msg.scriptpubkey.to_bytes().to_hex())));
3115 if self.counterparty_shutdown_scriptpubkey.is_some() {
3116 if Some(&msg.scriptpubkey) != self.counterparty_shutdown_scriptpubkey.as_ref() {
3117 return Err(ChannelError::Close(format!("Got shutdown request with a scriptpubkey ({}) which did not match their previous scriptpubkey.", msg.scriptpubkey.to_bytes().to_hex())));
3120 self.counterparty_shutdown_scriptpubkey = Some(msg.scriptpubkey.clone());
3123 // From here on out, we may not fail!
3125 self.channel_state |= ChannelState::RemoteShutdownSent as u32;
3126 self.update_time_counter += 1;
3128 // We can't send our shutdown until we've committed all of our pending HTLCs, but the
3129 // remote side is unlikely to accept any new HTLCs, so we go ahead and "free" any holding
3130 // cell HTLCs and return them to fail the payment.
3131 self.holding_cell_update_fee = None;
3132 let mut dropped_outbound_htlcs = Vec::with_capacity(self.holding_cell_htlc_updates.len());
3133 self.holding_cell_htlc_updates.retain(|htlc_update| {
3135 &HTLCUpdateAwaitingACK::AddHTLC { ref payment_hash, ref source, .. } => {
3136 dropped_outbound_htlcs.push((source.clone(), payment_hash.clone()));
3142 // If we have any LocalAnnounced updates we'll probably just get back a update_fail_htlc
3143 // immediately after the commitment dance, but we can send a Shutdown cause we won't send
3144 // any further commitment updates after we set LocalShutdownSent.
3146 let shutdown = if (self.channel_state & ChannelState::LocalShutdownSent as u32) == ChannelState::LocalShutdownSent as u32 {
3149 Some(msgs::Shutdown {
3150 channel_id: self.channel_id,
3151 scriptpubkey: self.get_closing_scriptpubkey(),
3155 self.channel_state |= ChannelState::LocalShutdownSent as u32;
3156 self.update_time_counter += 1;
3158 Ok((shutdown, self.maybe_propose_first_closing_signed(fee_estimator), dropped_outbound_htlcs))
3161 fn build_signed_closing_transaction(&self, tx: &mut Transaction, counterparty_sig: &Signature, sig: &Signature) {
3162 if tx.input.len() != 1 { panic!("Tried to sign closing transaction that had input count != 1!"); }
3163 if tx.input[0].witness.len() != 0 { panic!("Tried to re-sign closing transaction"); }
3164 if tx.output.len() > 2 { panic!("Tried to sign bogus closing transaction"); }
3166 tx.input[0].witness.push(Vec::new()); // First is the multisig dummy
3168 let funding_key = self.get_holder_pubkeys().funding_pubkey.serialize();
3169 let counterparty_funding_key = self.counterparty_funding_pubkey().serialize();
3170 if funding_key[..] < counterparty_funding_key[..] {
3171 tx.input[0].witness.push(sig.serialize_der().to_vec());
3172 tx.input[0].witness.push(counterparty_sig.serialize_der().to_vec());
3174 tx.input[0].witness.push(counterparty_sig.serialize_der().to_vec());
3175 tx.input[0].witness.push(sig.serialize_der().to_vec());
3177 tx.input[0].witness[1].push(SigHashType::All as u8);
3178 tx.input[0].witness[2].push(SigHashType::All as u8);
3180 tx.input[0].witness.push(self.get_funding_redeemscript().into_bytes());
3183 pub fn closing_signed<F: Deref>(&mut self, fee_estimator: &F, msg: &msgs::ClosingSigned) -> Result<(Option<msgs::ClosingSigned>, Option<Transaction>), ChannelError>
3184 where F::Target: FeeEstimator
3186 if self.channel_state & BOTH_SIDES_SHUTDOWN_MASK != BOTH_SIDES_SHUTDOWN_MASK {
3187 return Err(ChannelError::Close("Remote end sent us a closing_signed before both sides provided a shutdown".to_owned()));
3189 if self.channel_state & (ChannelState::PeerDisconnected as u32) == ChannelState::PeerDisconnected as u32 {
3190 return Err(ChannelError::Close("Peer sent closing_signed when we needed a channel_reestablish".to_owned()));
3192 if !self.pending_inbound_htlcs.is_empty() || !self.pending_outbound_htlcs.is_empty() {
3193 return Err(ChannelError::Close("Remote end sent us a closing_signed while there were still pending HTLCs".to_owned()));
3195 if msg.fee_satoshis > 21_000_000 * 1_0000_0000 { //this is required to stop potential overflow in build_closing_transaction
3196 return Err(ChannelError::Close("Remote tried to send us a closing tx with > 21 million BTC fee".to_owned()));
3199 let funding_redeemscript = self.get_funding_redeemscript();
3200 let (mut closing_tx, used_total_fee) = self.build_closing_transaction(msg.fee_satoshis, false);
3201 if used_total_fee != msg.fee_satoshis {
3202 return Err(ChannelError::Close(format!("Remote sent us a closing_signed with a fee greater than the value they can claim. Fee in message: {}", msg.fee_satoshis)));
3204 let mut sighash = hash_to_message!(&bip143::SigHashCache::new(&closing_tx).signature_hash(0, &funding_redeemscript, self.channel_value_satoshis, SigHashType::All)[..]);
3206 match self.secp_ctx.verify(&sighash, &msg.signature, &self.get_counterparty_pubkeys().funding_pubkey) {
3209 // The remote end may have decided to revoke their output due to inconsistent dust
3210 // limits, so check for that case by re-checking the signature here.
3211 closing_tx = self.build_closing_transaction(msg.fee_satoshis, true).0;
3212 sighash = hash_to_message!(&bip143::SigHashCache::new(&closing_tx).signature_hash(0, &funding_redeemscript, self.channel_value_satoshis, SigHashType::All)[..]);
3213 secp_check!(self.secp_ctx.verify(&sighash, &msg.signature, self.counterparty_funding_pubkey()), "Invalid closing tx signature from peer".to_owned());
3217 let closing_tx_max_weight = self.get_closing_transaction_weight(
3218 if let Some(oup) = closing_tx.output.get(0) { Some(&oup.script_pubkey) } else { None },
3219 if let Some(oup) = closing_tx.output.get(1) { Some(&oup.script_pubkey) } else { None });
3220 if let Some((_, last_fee, sig)) = self.last_sent_closing_fee {
3221 if last_fee == msg.fee_satoshis {
3222 self.build_signed_closing_transaction(&mut closing_tx, &msg.signature, &sig);
3223 assert!(closing_tx.get_weight() as u64 <= closing_tx_max_weight);
3224 debug_assert!(closing_tx.get_weight() as u64 >= closing_tx_max_weight - 2);
3225 self.channel_state = ChannelState::ShutdownComplete as u32;
3226 self.update_time_counter += 1;
3227 return Ok((None, Some(closing_tx)));
3231 macro_rules! propose_new_feerate {
3232 ($new_feerate: expr) => {
3233 let tx_weight = self.get_closing_transaction_weight(Some(&self.get_closing_scriptpubkey()), Some(self.counterparty_shutdown_scriptpubkey.as_ref().unwrap()));
3234 let (closing_tx, used_total_fee) = self.build_closing_transaction($new_feerate as u64 * tx_weight / 1000, false);
3235 let sig = self.holder_signer
3236 .sign_closing_transaction(&closing_tx, &self.secp_ctx)
3237 .map_err(|_| ChannelError::Close("External signer refused to sign closing transaction".to_owned()))?;
3238 assert!(closing_tx.get_weight() as u64 <= tx_weight);
3239 self.last_sent_closing_fee = Some(($new_feerate, used_total_fee, sig.clone()));
3240 return Ok((Some(msgs::ClosingSigned {
3241 channel_id: self.channel_id,
3242 fee_satoshis: used_total_fee,
3248 let mut min_feerate = 253;
3249 if self.is_outbound() {
3250 let max_feerate = fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Normal);
3251 if (msg.fee_satoshis as u64) > max_feerate as u64 * closing_tx_max_weight / 1000 {
3252 if let Some((last_feerate, _, _)) = self.last_sent_closing_fee {
3253 if max_feerate <= last_feerate {
3254 return Err(ChannelError::Close(format!("Unable to come to consensus about closing feerate, remote wanted something higher ({}) than our Normal feerate ({})", last_feerate, max_feerate)));
3257 propose_new_feerate!(max_feerate);
3260 min_feerate = fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Background);
3262 if (msg.fee_satoshis as u64) < min_feerate as u64 * closing_tx_max_weight / 1000 {
3263 if let Some((last_feerate, _, _)) = self.last_sent_closing_fee {
3264 if min_feerate >= last_feerate {
3265 return Err(ChannelError::Close(format!("Unable to come to consensus about closing feerate, remote wanted something lower ({}) than our Background feerate ({}).", last_feerate, min_feerate)));
3268 propose_new_feerate!(min_feerate);
3271 let sig = self.holder_signer
3272 .sign_closing_transaction(&closing_tx, &self.secp_ctx)
3273 .map_err(|_| ChannelError::Close("External signer refused to sign closing transaction".to_owned()))?;
3274 self.build_signed_closing_transaction(&mut closing_tx, &msg.signature, &sig);
3275 assert!(closing_tx.get_weight() as u64 <= closing_tx_max_weight);
3276 debug_assert!(closing_tx.get_weight() as u64 >= closing_tx_max_weight - 2);
3278 self.channel_state = ChannelState::ShutdownComplete as u32;
3279 self.update_time_counter += 1;
3281 Ok((Some(msgs::ClosingSigned {
3282 channel_id: self.channel_id,
3283 fee_satoshis: msg.fee_satoshis,
3285 }), Some(closing_tx)))
3288 // Public utilities:
3290 pub fn channel_id(&self) -> [u8; 32] {
3294 /// Gets the "user_id" value passed into the construction of this channel. It has no special
3295 /// meaning and exists only to allow users to have a persistent identifier of a channel.
3296 pub fn get_user_id(&self) -> u64 {
3300 /// Guaranteed to be Some after both FundingLocked messages have been exchanged (and, thus,
3301 /// is_usable() returns true).
3302 /// Allowed in any state (including after shutdown)
3303 pub fn get_short_channel_id(&self) -> Option<u64> {
3304 self.short_channel_id
3307 /// Returns the funding_txo we either got from our peer, or were given by
3308 /// get_outbound_funding_created.
3309 pub fn get_funding_txo(&self) -> Option<OutPoint> {
3310 self.channel_transaction_parameters.funding_outpoint
3313 fn get_holder_selected_contest_delay(&self) -> u16 {
3314 self.channel_transaction_parameters.holder_selected_contest_delay
3317 fn get_holder_pubkeys(&self) -> &ChannelPublicKeys {
3318 &self.channel_transaction_parameters.holder_pubkeys
3321 fn get_counterparty_selected_contest_delay(&self) -> u16 {
3322 self.channel_transaction_parameters.counterparty_parameters.as_ref().unwrap().selected_contest_delay
3325 fn get_counterparty_pubkeys(&self) -> &ChannelPublicKeys {
3326 &self.channel_transaction_parameters.counterparty_parameters.as_ref().unwrap().pubkeys
3329 /// Allowed in any state (including after shutdown)
3330 pub fn get_counterparty_node_id(&self) -> PublicKey {
3331 self.counterparty_node_id
3334 /// Allowed in any state (including after shutdown)
3336 pub fn get_holder_htlc_minimum_msat(&self) -> u64 {
3337 self.holder_htlc_minimum_msat
3340 /// Allowed in any state (including after shutdown)
3341 pub fn get_announced_htlc_max_msat(&self) -> u64 {
3343 // Upper bound by capacity. We make it a bit less than full capacity to prevent attempts
3344 // to use full capacity. This is an effort to reduce routing failures, because in many cases
3345 // channel might have been used to route very small values (either by honest users or as DoS).
3346 self.channel_value_satoshis * 1000 * 9 / 10,
3348 Channel::<Signer>::get_holder_max_htlc_value_in_flight_msat(self.channel_value_satoshis)
3352 /// Allowed in any state (including after shutdown)
3353 pub fn get_counterparty_htlc_minimum_msat(&self) -> u64 {
3354 self.counterparty_htlc_minimum_msat
3357 pub fn get_value_satoshis(&self) -> u64 {
3358 self.channel_value_satoshis
3361 pub fn get_fee_proportional_millionths(&self) -> u32 {
3362 self.config.fee_proportional_millionths
3365 pub fn get_cltv_expiry_delta(&self) -> u16 {
3366 cmp::max(self.config.cltv_expiry_delta, MIN_CLTV_EXPIRY_DELTA)
3370 pub fn get_feerate(&self) -> u32 {
3374 pub fn get_cur_holder_commitment_transaction_number(&self) -> u64 {
3375 self.cur_holder_commitment_transaction_number + 1
3378 pub fn get_cur_counterparty_commitment_transaction_number(&self) -> u64 {
3379 self.cur_counterparty_commitment_transaction_number + 1 - if self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32) != 0 { 1 } else { 0 }
3382 pub fn get_revoked_counterparty_commitment_transaction_number(&self) -> u64 {
3383 self.cur_counterparty_commitment_transaction_number + 2
3387 pub fn get_signer(&self) -> &Signer {
3392 pub fn get_value_stat(&self) -> ChannelValueStat {
3394 value_to_self_msat: self.value_to_self_msat,
3395 channel_value_msat: self.channel_value_satoshis * 1000,
3396 channel_reserve_msat: self.counterparty_selected_channel_reserve_satoshis * 1000,
3397 pending_outbound_htlcs_amount_msat: self.pending_outbound_htlcs.iter().map(|ref h| h.amount_msat).sum::<u64>(),
3398 pending_inbound_htlcs_amount_msat: self.pending_inbound_htlcs.iter().map(|ref h| h.amount_msat).sum::<u64>(),
3399 holding_cell_outbound_amount_msat: {
3401 for h in self.holding_cell_htlc_updates.iter() {
3403 &HTLCUpdateAwaitingACK::AddHTLC{amount_msat, .. } => {
3411 counterparty_max_htlc_value_in_flight_msat: self.counterparty_max_htlc_value_in_flight_msat,
3412 counterparty_dust_limit_msat: self.counterparty_dust_limit_satoshis * 1000,
3416 /// Allowed in any state (including after shutdown)
3417 pub fn get_update_time_counter(&self) -> u32 {
3418 self.update_time_counter
3421 pub fn get_latest_monitor_update_id(&self) -> u64 {
3422 self.latest_monitor_update_id
3425 pub fn should_announce(&self) -> bool {
3426 self.config.announced_channel
3429 pub fn is_outbound(&self) -> bool {
3430 self.channel_transaction_parameters.is_outbound_from_holder
3433 /// Gets the fee we'd want to charge for adding an HTLC output to this Channel
3434 /// Allowed in any state (including after shutdown)
3435 pub fn get_holder_fee_base_msat<F: Deref>(&self, fee_estimator: &F) -> u32
3436 where F::Target: FeeEstimator
3438 // For lack of a better metric, we calculate what it would cost to consolidate the new HTLC
3439 // output value back into a transaction with the regular channel output:
3441 // the fee cost of the HTLC-Success/HTLC-Timeout transaction:
3442 let mut res = self.feerate_per_kw as u64 * cmp::max(HTLC_TIMEOUT_TX_WEIGHT, HTLC_SUCCESS_TX_WEIGHT) / 1000;
3444 if self.is_outbound() {
3445 // + the marginal fee increase cost to us in the commitment transaction:
3446 res += self.feerate_per_kw as u64 * COMMITMENT_TX_WEIGHT_PER_HTLC / 1000;
3449 // + the marginal cost of an input which spends the HTLC-Success/HTLC-Timeout output:
3450 res += fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Normal) as u64 * SPENDING_INPUT_FOR_A_OUTPUT_WEIGHT / 1000;
3455 /// Returns true if we've ever received a message from the remote end for this Channel
3456 pub fn have_received_message(&self) -> bool {
3457 self.channel_state > (ChannelState::OurInitSent as u32)
3460 /// Returns true if this channel is fully established and not known to be closing.
3461 /// Allowed in any state (including after shutdown)
3462 pub fn is_usable(&self) -> bool {
3463 let mask = ChannelState::ChannelFunded as u32 | BOTH_SIDES_SHUTDOWN_MASK;
3464 (self.channel_state & mask) == (ChannelState::ChannelFunded as u32)
3467 /// Returns true if this channel is currently available for use. This is a superset of
3468 /// is_usable() and considers things like the channel being temporarily disabled.
3469 /// Allowed in any state (including after shutdown)
3470 pub fn is_live(&self) -> bool {
3471 self.is_usable() && (self.channel_state & (ChannelState::PeerDisconnected as u32 | ChannelState::MonitorUpdateFailed as u32) == 0)
3474 /// Returns true if this channel has been marked as awaiting a monitor update to move forward.
3475 /// Allowed in any state (including after shutdown)
3476 pub fn is_awaiting_monitor_update(&self) -> bool {
3477 (self.channel_state & ChannelState::MonitorUpdateFailed as u32) != 0
3480 /// Returns true if funding_created was sent/received.
3481 pub fn is_funding_initiated(&self) -> bool {
3482 self.channel_state >= ChannelState::FundingSent as u32
3485 /// Returns true if this channel is fully shut down. True here implies that no further actions
3486 /// may/will be taken on this channel, and thus this object should be freed. Any future changes
3487 /// will be handled appropriately by the chain monitor.
3488 pub fn is_shutdown(&self) -> bool {
3489 if (self.channel_state & ChannelState::ShutdownComplete as u32) == ChannelState::ShutdownComplete as u32 {
3490 assert!(self.channel_state == ChannelState::ShutdownComplete as u32);
3495 pub fn to_disabled_staged(&mut self) {
3496 self.network_sync = UpdateStatus::DisabledStaged;
3499 pub fn to_disabled_marked(&mut self) {
3500 self.network_sync = UpdateStatus::DisabledMarked;
3503 pub fn to_fresh(&mut self) {
3504 self.network_sync = UpdateStatus::Fresh;
3507 pub fn is_disabled_staged(&self) -> bool {
3508 self.network_sync == UpdateStatus::DisabledStaged
3511 pub fn is_disabled_marked(&self) -> bool {
3512 self.network_sync == UpdateStatus::DisabledMarked
3515 /// When we receive a new block, we (a) check whether the block contains the funding
3516 /// transaction (which would start us counting blocks until we send the funding_signed), and
3517 /// (b) check the height of the block against outbound holding cell HTLCs in case we need to
3518 /// give up on them prematurely and time them out. Everything else (e.g. commitment
3519 /// transaction broadcasts, channel closure detection, HTLC transaction broadcasting, etc) is
3520 /// handled by the ChannelMonitor.
3522 /// If we return Err, the channel may have been closed, at which point the standard
3523 /// requirements apply - no calls may be made except those explicitly stated to be allowed
3525 /// Only returns an ErrorAction of DisconnectPeer, if Err.
3527 /// May return some HTLCs (and their payment_hash) which have timed out and should be failed
3529 pub fn block_connected(&mut self, header: &BlockHeader, txdata: &TransactionData, height: u32) -> Result<(Option<msgs::FundingLocked>, Vec<(HTLCSource, PaymentHash)>), msgs::ErrorMessage> {
3530 let mut timed_out_htlcs = Vec::new();
3531 self.holding_cell_htlc_updates.retain(|htlc_update| {
3533 &HTLCUpdateAwaitingACK::AddHTLC { ref payment_hash, ref source, ref cltv_expiry, .. } => {
3534 if *cltv_expiry <= height + HTLC_FAIL_BACK_BUFFER {
3535 timed_out_htlcs.push((source.clone(), payment_hash.clone()));
3543 if self.funding_tx_confirmations > 0 {
3544 self.funding_tx_confirmations += 1;
3547 let non_shutdown_state = self.channel_state & (!MULTI_STATE_FLAGS);
3548 if non_shutdown_state & !(ChannelState::TheirFundingLocked as u32) == ChannelState::FundingSent as u32 {
3549 for &(index_in_block, tx) in txdata.iter() {
3550 let funding_txo = self.get_funding_txo().unwrap();
3551 if tx.txid() == funding_txo.txid {
3552 let txo_idx = funding_txo.index as usize;
3553 if txo_idx >= tx.output.len() || tx.output[txo_idx].script_pubkey != self.get_funding_redeemscript().to_v0_p2wsh() ||
3554 tx.output[txo_idx].value != self.channel_value_satoshis {
3555 if self.is_outbound() {
3556 // If we generated the funding transaction and it doesn't match what it
3557 // should, the client is really broken and we should just panic and
3558 // tell them off. That said, because hash collisions happen with high
3559 // probability in fuzztarget mode, if we're fuzzing we just close the
3560 // channel and move on.
3561 #[cfg(not(feature = "fuzztarget"))]
3562 panic!("Client called ChannelManager::funding_transaction_generated with bogus transaction!");
3564 self.channel_state = ChannelState::ShutdownComplete as u32;
3565 self.update_time_counter += 1;
3566 return Err(msgs::ErrorMessage {
3567 channel_id: self.channel_id(),
3568 data: "funding tx had wrong script/value".to_owned()
3571 if self.is_outbound() {
3572 for input in tx.input.iter() {
3573 if input.witness.is_empty() {
3574 // We generated a malleable funding transaction, implying we've
3575 // just exposed ourselves to funds loss to our counterparty.
3576 #[cfg(not(feature = "fuzztarget"))]
3577 panic!("Client called ChannelManager::funding_transaction_generated with bogus transaction!");
3581 self.funding_tx_confirmations = 1;
3582 self.short_channel_id = match scid_from_parts(height as u64, index_in_block as u64, txo_idx as u64) {
3583 Ok(scid) => Some(scid),
3584 Err(_) => panic!("Block was bogus - either height was > 16 million, had > 16 million transactions, or had > 65k outputs"),
3591 self.update_time_counter = cmp::max(self.update_time_counter, header.time);
3592 if self.funding_tx_confirmations > 0 {
3593 if self.funding_tx_confirmations == self.minimum_depth as u64 {
3594 let need_commitment_update = if non_shutdown_state == ChannelState::FundingSent as u32 {
3595 self.channel_state |= ChannelState::OurFundingLocked as u32;
3597 } else if non_shutdown_state == (ChannelState::FundingSent as u32 | ChannelState::TheirFundingLocked as u32) {
3598 self.channel_state = ChannelState::ChannelFunded as u32 | (self.channel_state & MULTI_STATE_FLAGS);
3599 self.update_time_counter += 1;
3601 } else if non_shutdown_state == (ChannelState::FundingSent as u32 | ChannelState::OurFundingLocked as u32) {
3602 // We got a reorg but not enough to trigger a force close, just update
3603 // funding_tx_confirmed_in and return.
3605 } else if self.channel_state < ChannelState::ChannelFunded as u32 {
3606 panic!("Started confirming a channel in a state pre-FundingSent?: {}", self.channel_state);
3608 // We got a reorg but not enough to trigger a force close, just update
3609 // funding_tx_confirmed_in and return.
3612 self.funding_tx_confirmed_in = Some(header.block_hash());
3614 //TODO: Note that this must be a duplicate of the previous commitment point they sent us,
3615 //as otherwise we will have a commitment transaction that they can't revoke (well, kinda,
3616 //they can by sending two revoke_and_acks back-to-back, but not really). This appears to be
3617 //a protocol oversight, but I assume I'm just missing something.
3618 if need_commitment_update {
3619 if self.channel_state & (ChannelState::MonitorUpdateFailed as u32) == 0 {
3620 let next_per_commitment_point = self.holder_signer.get_per_commitment_point(self.cur_holder_commitment_transaction_number, &self.secp_ctx);
3621 return Ok((Some(msgs::FundingLocked {
3622 channel_id: self.channel_id,
3623 next_per_commitment_point,
3624 }), timed_out_htlcs));
3626 self.monitor_pending_funding_locked = true;
3627 return Ok((None, timed_out_htlcs));
3632 Ok((None, timed_out_htlcs))
3635 /// Called by channelmanager based on chain blocks being disconnected.
3636 /// Returns true if we need to close the channel now due to funding transaction
3637 /// unconfirmation/reorg.
3638 pub fn block_disconnected(&mut self, header: &BlockHeader) -> bool {
3639 if self.funding_tx_confirmations > 0 {
3640 self.funding_tx_confirmations -= 1;
3641 if self.funding_tx_confirmations == UNCONF_THRESHOLD as u64 {
3645 if Some(header.block_hash()) == self.funding_tx_confirmed_in {
3646 self.funding_tx_confirmations = self.minimum_depth as u64 - 1;
3651 // Methods to get unprompted messages to send to the remote end (or where we already returned
3652 // something in the handler for the message that prompted this message):
3654 pub fn get_open_channel(&self, chain_hash: BlockHash) -> msgs::OpenChannel {
3655 if !self.is_outbound() {
3656 panic!("Tried to open a channel for an inbound channel?");
3658 if self.channel_state != ChannelState::OurInitSent as u32 {
3659 panic!("Cannot generate an open_channel after we've moved forward");
3662 if self.cur_holder_commitment_transaction_number != INITIAL_COMMITMENT_NUMBER {
3663 panic!("Tried to send an open_channel for a channel that has already advanced");
3666 let first_per_commitment_point = self.holder_signer.get_per_commitment_point(self.cur_holder_commitment_transaction_number, &self.secp_ctx);
3667 let keys = self.get_holder_pubkeys();
3671 temporary_channel_id: self.channel_id,
3672 funding_satoshis: self.channel_value_satoshis,
3673 push_msat: self.channel_value_satoshis * 1000 - self.value_to_self_msat,
3674 dust_limit_satoshis: self.holder_dust_limit_satoshis,
3675 max_htlc_value_in_flight_msat: Channel::<Signer>::get_holder_max_htlc_value_in_flight_msat(self.channel_value_satoshis),
3676 channel_reserve_satoshis: Channel::<Signer>::get_holder_selected_channel_reserve_satoshis(self.channel_value_satoshis),
3677 htlc_minimum_msat: self.holder_htlc_minimum_msat,
3678 feerate_per_kw: self.feerate_per_kw as u32,
3679 to_self_delay: self.get_holder_selected_contest_delay(),
3680 max_accepted_htlcs: OUR_MAX_HTLCS,
3681 funding_pubkey: keys.funding_pubkey,
3682 revocation_basepoint: keys.revocation_basepoint,
3683 payment_point: keys.payment_point,
3684 delayed_payment_basepoint: keys.delayed_payment_basepoint,
3685 htlc_basepoint: keys.htlc_basepoint,
3686 first_per_commitment_point,
3687 channel_flags: if self.config.announced_channel {1} else {0},
3688 shutdown_scriptpubkey: OptionalField::Present(if self.config.commit_upfront_shutdown_pubkey { self.get_closing_scriptpubkey() } else { Builder::new().into_script() })
3692 pub fn get_accept_channel(&self) -> msgs::AcceptChannel {
3693 if self.is_outbound() {
3694 panic!("Tried to send accept_channel for an outbound channel?");
3696 if self.channel_state != (ChannelState::OurInitSent as u32) | (ChannelState::TheirInitSent as u32) {
3697 panic!("Tried to send accept_channel after channel had moved forward");
3699 if self.cur_holder_commitment_transaction_number != INITIAL_COMMITMENT_NUMBER {
3700 panic!("Tried to send an accept_channel for a channel that has already advanced");
3703 let first_per_commitment_point = self.holder_signer.get_per_commitment_point(self.cur_holder_commitment_transaction_number, &self.secp_ctx);
3704 let keys = self.get_holder_pubkeys();
3706 msgs::AcceptChannel {
3707 temporary_channel_id: self.channel_id,
3708 dust_limit_satoshis: self.holder_dust_limit_satoshis,
3709 max_htlc_value_in_flight_msat: Channel::<Signer>::get_holder_max_htlc_value_in_flight_msat(self.channel_value_satoshis),
3710 channel_reserve_satoshis: Channel::<Signer>::get_holder_selected_channel_reserve_satoshis(self.channel_value_satoshis),
3711 htlc_minimum_msat: self.holder_htlc_minimum_msat,
3712 minimum_depth: self.minimum_depth,
3713 to_self_delay: self.get_holder_selected_contest_delay(),
3714 max_accepted_htlcs: OUR_MAX_HTLCS,
3715 funding_pubkey: keys.funding_pubkey,
3716 revocation_basepoint: keys.revocation_basepoint,
3717 payment_point: keys.payment_point,
3718 delayed_payment_basepoint: keys.delayed_payment_basepoint,
3719 htlc_basepoint: keys.htlc_basepoint,
3720 first_per_commitment_point,
3721 shutdown_scriptpubkey: OptionalField::Present(if self.config.commit_upfront_shutdown_pubkey { self.get_closing_scriptpubkey() } else { Builder::new().into_script() })
3725 /// If an Err is returned, it is a ChannelError::Close (for get_outbound_funding_created)
3726 fn get_outbound_funding_created_signature<L: Deref>(&mut self, logger: &L) -> Result<Signature, ChannelError> where L::Target: Logger {
3727 let counterparty_keys = self.build_remote_transaction_keys()?;
3728 let counterparty_initial_commitment_tx = self.build_commitment_transaction(self.cur_counterparty_commitment_transaction_number, &counterparty_keys, false, false, self.feerate_per_kw, logger).0;
3729 Ok(self.holder_signer.sign_counterparty_commitment(&counterparty_initial_commitment_tx, &self.secp_ctx)
3730 .map_err(|_| ChannelError::Close("Failed to get signatures for new commitment_signed".to_owned()))?.0)
3733 /// Updates channel state with knowledge of the funding transaction's txid/index, and generates
3734 /// a funding_created message for the remote peer.
3735 /// Panics if called at some time other than immediately after initial handshake, if called twice,
3736 /// or if called on an inbound channel.
3737 /// Note that channel_id changes during this call!
3738 /// Do NOT broadcast the funding transaction until after a successful funding_signed call!
3739 /// If an Err is returned, it is a ChannelError::Close.
3740 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 {
3741 if !self.is_outbound() {
3742 panic!("Tried to create outbound funding_created message on an inbound channel!");
3744 if self.channel_state != (ChannelState::OurInitSent as u32 | ChannelState::TheirInitSent as u32) {
3745 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)");
3747 if self.commitment_secrets.get_min_seen_secret() != (1 << 48) ||
3748 self.cur_counterparty_commitment_transaction_number != INITIAL_COMMITMENT_NUMBER ||
3749 self.cur_holder_commitment_transaction_number != INITIAL_COMMITMENT_NUMBER {
3750 panic!("Should not have advanced channel commitment tx numbers prior to funding_created");
3753 self.channel_transaction_parameters.funding_outpoint = Some(funding_txo);
3754 self.holder_signer.ready_channel(&self.channel_transaction_parameters);
3756 let signature = match self.get_outbound_funding_created_signature(logger) {
3759 log_error!(logger, "Got bad signatures: {:?}!", e);
3760 self.channel_transaction_parameters.funding_outpoint = None;
3765 let temporary_channel_id = self.channel_id;
3767 // Now that we're past error-generating stuff, update our local state:
3769 self.channel_state = ChannelState::FundingCreated as u32;
3770 self.channel_id = funding_txo.to_channel_id();
3771 self.funding_transaction = Some(funding_transaction);
3773 Ok(msgs::FundingCreated {
3774 temporary_channel_id,
3775 funding_txid: funding_txo.txid,
3776 funding_output_index: funding_txo.index,
3781 /// Gets an UnsignedChannelAnnouncement, as well as a signature covering it using our
3782 /// bitcoin_key, if available, for this channel. The channel must be publicly announceable and
3783 /// available for use (have exchanged FundingLocked messages in both directions). Should be used
3784 /// for both loose and in response to an AnnouncementSignatures message from the remote peer.
3785 /// Will only fail if we're not in a state where channel_announcement may be sent (including
3787 /// Note that the "channel must be funded" requirement is stricter than BOLT 7 requires - see
3788 /// https://github.com/lightningnetwork/lightning-rfc/issues/468
3789 pub fn get_channel_announcement(&self, node_id: PublicKey, chain_hash: BlockHash) -> Result<(msgs::UnsignedChannelAnnouncement, Signature), ChannelError> {
3790 if !self.config.announced_channel {
3791 return Err(ChannelError::Ignore("Channel is not available for public announcements".to_owned()));
3793 if self.channel_state & (ChannelState::ChannelFunded as u32) == 0 {
3794 return Err(ChannelError::Ignore("Cannot get a ChannelAnnouncement until the channel funding has been locked".to_owned()));
3796 if (self.channel_state & (ChannelState::LocalShutdownSent as u32 | ChannelState::ShutdownComplete as u32)) != 0 {
3797 return Err(ChannelError::Ignore("Cannot get a ChannelAnnouncement once the channel is closing".to_owned()));
3800 let were_node_one = node_id.serialize()[..] < self.counterparty_node_id.serialize()[..];
3802 let msg = msgs::UnsignedChannelAnnouncement {
3803 features: ChannelFeatures::known(),
3805 short_channel_id: self.get_short_channel_id().unwrap(),
3806 node_id_1: if were_node_one { node_id } else { self.get_counterparty_node_id() },
3807 node_id_2: if were_node_one { self.get_counterparty_node_id() } else { node_id },
3808 bitcoin_key_1: if were_node_one { self.get_holder_pubkeys().funding_pubkey } else { self.counterparty_funding_pubkey().clone() },
3809 bitcoin_key_2: if were_node_one { self.counterparty_funding_pubkey().clone() } else { self.get_holder_pubkeys().funding_pubkey },
3810 excess_data: Vec::new(),
3813 let sig = self.holder_signer.sign_channel_announcement(&msg, &self.secp_ctx)
3814 .map_err(|_| ChannelError::Ignore("Signer rejected channel_announcement".to_owned()))?;
3819 /// May panic if called on a channel that wasn't immediately-previously
3820 /// self.remove_uncommitted_htlcs_and_mark_paused()'d
3821 pub fn get_channel_reestablish<L: Deref>(&self, logger: &L) -> msgs::ChannelReestablish where L::Target: Logger {
3822 assert_eq!(self.channel_state & ChannelState::PeerDisconnected as u32, ChannelState::PeerDisconnected as u32);
3823 assert_ne!(self.cur_counterparty_commitment_transaction_number, INITIAL_COMMITMENT_NUMBER);
3824 // Prior to static_remotekey, my_current_per_commitment_point was critical to claiming
3825 // current to_remote balances. However, it no longer has any use, and thus is now simply
3826 // set to a dummy (but valid, as required by the spec) public key.
3827 // fuzztarget mode marks a subset of pubkeys as invalid so that we can hit "invalid pubkey"
3828 // branches, but we unwrap it below, so we arbitrarily select a dummy pubkey which is both
3829 // valid, and valid in fuzztarget mode's arbitrary validity criteria:
3830 let mut pk = [2; 33]; pk[1] = 0xff;
3831 let dummy_pubkey = PublicKey::from_slice(&pk).unwrap();
3832 let data_loss_protect = if self.cur_counterparty_commitment_transaction_number + 1 < INITIAL_COMMITMENT_NUMBER {
3833 let remote_last_secret = self.commitment_secrets.get_secret(self.cur_counterparty_commitment_transaction_number + 2).unwrap();
3834 log_trace!(logger, "Enough info to generate a Data Loss Protect with per_commitment_secret {}", log_bytes!(remote_last_secret));
3835 OptionalField::Present(DataLossProtect {
3836 your_last_per_commitment_secret: remote_last_secret,
3837 my_current_per_commitment_point: dummy_pubkey
3840 log_info!(logger, "Sending a data_loss_protect with no previous remote per_commitment_secret");
3841 OptionalField::Present(DataLossProtect {
3842 your_last_per_commitment_secret: [0;32],
3843 my_current_per_commitment_point: dummy_pubkey,
3846 msgs::ChannelReestablish {
3847 channel_id: self.channel_id(),
3848 // The protocol has two different commitment number concepts - the "commitment
3849 // transaction number", which starts from 0 and counts up, and the "revocation key
3850 // index" which starts at INITIAL_COMMITMENT_NUMBER and counts down. We track
3851 // commitment transaction numbers by the index which will be used to reveal the
3852 // revocation key for that commitment transaction, which means we have to convert them
3853 // to protocol-level commitment numbers here...
3855 // next_local_commitment_number is the next commitment_signed number we expect to
3856 // receive (indicating if they need to resend one that we missed).
3857 next_local_commitment_number: INITIAL_COMMITMENT_NUMBER - self.cur_holder_commitment_transaction_number,
3858 // We have to set next_remote_commitment_number to the next revoke_and_ack we expect to
3859 // receive, however we track it by the next commitment number for a remote transaction
3860 // (which is one further, as they always revoke previous commitment transaction, not
3861 // the one we send) so we have to decrement by 1. Note that if
3862 // cur_counterparty_commitment_transaction_number is INITIAL_COMMITMENT_NUMBER we will have
3863 // dropped this channel on disconnect as it hasn't yet reached FundingSent so we can't
3865 next_remote_commitment_number: INITIAL_COMMITMENT_NUMBER - self.cur_counterparty_commitment_transaction_number - 1,
3871 // Send stuff to our remote peers:
3873 /// Adds a pending outbound HTLC to this channel, note that you probably want
3874 /// send_htlc_and_commit instead cause you'll want both messages at once.
3875 /// This returns an option instead of a pure UpdateAddHTLC as we may be in a state where we are
3876 /// waiting on the remote peer to send us a revoke_and_ack during which time we cannot add new
3877 /// HTLCs on the wire or we wouldn't be able to determine what they actually ACK'ed.
3878 /// You MUST call send_commitment prior to any other calls on this Channel
3879 /// If an Err is returned, it's a ChannelError::Ignore!
3880 pub fn send_htlc(&mut self, amount_msat: u64, payment_hash: PaymentHash, cltv_expiry: u32, source: HTLCSource, onion_routing_packet: msgs::OnionPacket) -> Result<Option<msgs::UpdateAddHTLC>, ChannelError> {
3881 if (self.channel_state & (ChannelState::ChannelFunded as u32 | BOTH_SIDES_SHUTDOWN_MASK)) != (ChannelState::ChannelFunded as u32) {
3882 return Err(ChannelError::Ignore("Cannot send HTLC until channel is fully established and we haven't started shutting down".to_owned()));
3884 let channel_total_msat = self.channel_value_satoshis * 1000;
3885 if amount_msat > channel_total_msat {
3886 return Err(ChannelError::Ignore(format!("Cannot send amount {}, because it is more than the total value of the channel {}", amount_msat, channel_total_msat)));
3889 if amount_msat == 0 {
3890 return Err(ChannelError::Ignore("Cannot send 0-msat HTLC".to_owned()));
3893 if amount_msat < self.counterparty_htlc_minimum_msat {
3894 return Err(ChannelError::Ignore(format!("Cannot send less than their minimum HTLC value ({})", self.counterparty_htlc_minimum_msat)));
3897 if (self.channel_state & (ChannelState::PeerDisconnected as u32 | ChannelState::MonitorUpdateFailed as u32)) != 0 {
3898 // Note that this should never really happen, if we're !is_live() on receipt of an
3899 // incoming HTLC for relay will result in us rejecting the HTLC and we won't allow
3900 // the user to send directly into a !is_live() channel. However, if we
3901 // disconnected during the time the previous hop was doing the commitment dance we may
3902 // end up getting here after the forwarding delay. In any case, returning an
3903 // IgnoreError will get ChannelManager to do the right thing and fail backwards now.
3904 return Err(ChannelError::Ignore("Cannot send an HTLC while disconnected/frozen for channel monitor update".to_owned()));
3907 let (outbound_htlc_count, htlc_outbound_value_msat) = self.get_outbound_pending_htlc_stats();
3908 if outbound_htlc_count + 1 > self.counterparty_max_accepted_htlcs as u32 {
3909 return Err(ChannelError::Ignore(format!("Cannot push more than their max accepted HTLCs ({})", self.counterparty_max_accepted_htlcs)));
3911 // Check their_max_htlc_value_in_flight_msat
3912 if htlc_outbound_value_msat + amount_msat > self.counterparty_max_htlc_value_in_flight_msat {
3913 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)));
3916 if !self.is_outbound() {
3917 // Check that we won't violate the remote channel reserve by adding this HTLC.
3918 let counterparty_balance_msat = self.channel_value_satoshis * 1000 - self.value_to_self_msat;
3919 let holder_selected_chan_reserve_msat = Channel::<Signer>::get_holder_selected_channel_reserve_satoshis(self.channel_value_satoshis);
3920 let htlc_candidate = HTLCCandidate::new(amount_msat, HTLCInitiator::LocalOffered);
3921 let counterparty_commit_tx_fee_msat = self.next_remote_commit_tx_fee_msat(htlc_candidate, None);
3922 if counterparty_balance_msat < holder_selected_chan_reserve_msat + counterparty_commit_tx_fee_msat {
3923 return Err(ChannelError::Ignore("Cannot send value that would put counterparty balance under holder-announced channel reserve value".to_owned()));
3927 let pending_value_to_self_msat = self.value_to_self_msat - htlc_outbound_value_msat;
3928 if pending_value_to_self_msat < amount_msat {
3929 return Err(ChannelError::Ignore(format!("Cannot send value that would overdraw remaining funds. Amount: {}, pending value to self {}", amount_msat, pending_value_to_self_msat)));
3932 // `2 *` and extra HTLC are for the fee spike buffer.
3933 let commit_tx_fee_msat = if self.is_outbound() {
3934 let htlc_candidate = HTLCCandidate::new(amount_msat, HTLCInitiator::LocalOffered);
3935 2 * self.next_local_commit_tx_fee_msat(htlc_candidate, Some(()))
3937 if pending_value_to_self_msat - amount_msat < commit_tx_fee_msat {
3938 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 {}", pending_value_to_self_msat, commit_tx_fee_msat)));
3941 // Check self.counterparty_selected_channel_reserve_satoshis (the amount we must keep as
3942 // reserve for the remote to have something to claim if we misbehave)
3943 let chan_reserve_msat = self.counterparty_selected_channel_reserve_satoshis * 1000;
3944 if pending_value_to_self_msat - amount_msat - commit_tx_fee_msat < chan_reserve_msat {
3945 return Err(ChannelError::Ignore(format!("Cannot send value that would put our balance under counterparty-announced channel reserve value ({})", chan_reserve_msat)));
3948 // Now update local state:
3949 if (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32)) == (ChannelState::AwaitingRemoteRevoke as u32) {
3950 self.holding_cell_htlc_updates.push(HTLCUpdateAwaitingACK::AddHTLC {
3955 onion_routing_packet,
3960 self.pending_outbound_htlcs.push(OutboundHTLCOutput {
3961 htlc_id: self.next_holder_htlc_id,
3963 payment_hash: payment_hash.clone(),
3965 state: OutboundHTLCState::LocalAnnounced(Box::new(onion_routing_packet.clone())),
3969 let res = msgs::UpdateAddHTLC {
3970 channel_id: self.channel_id,
3971 htlc_id: self.next_holder_htlc_id,
3975 onion_routing_packet,
3977 self.next_holder_htlc_id += 1;
3982 /// Creates a signed commitment transaction to send to the remote peer.
3983 /// Always returns a ChannelError::Close if an immediately-preceding (read: the
3984 /// last call to this Channel) send_htlc returned Ok(Some(_)) and there is an Err.
3985 /// May panic if called except immediately after a successful, Ok(Some(_))-returning send_htlc.
3986 pub fn send_commitment<L: Deref>(&mut self, logger: &L) -> Result<(msgs::CommitmentSigned, ChannelMonitorUpdate), ChannelError> where L::Target: Logger {
3987 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
3988 panic!("Cannot create commitment tx until channel is fully established");
3990 if (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32)) == (ChannelState::AwaitingRemoteRevoke as u32) {
3991 panic!("Cannot create commitment tx until remote revokes their previous commitment");
3993 if (self.channel_state & (ChannelState::PeerDisconnected as u32)) == (ChannelState::PeerDisconnected as u32) {
3994 panic!("Cannot create commitment tx while disconnected, as send_htlc will have returned an Err so a send_commitment precondition has been violated");
3996 if (self.channel_state & (ChannelState::MonitorUpdateFailed as u32)) == (ChannelState::MonitorUpdateFailed as u32) {
3997 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");
3999 let mut have_updates = self.pending_update_fee.is_some();
4000 for htlc in self.pending_outbound_htlcs.iter() {
4001 if let OutboundHTLCState::LocalAnnounced(_) = htlc.state {
4002 have_updates = true;
4004 if have_updates { break; }
4006 for htlc in self.pending_inbound_htlcs.iter() {
4007 if let InboundHTLCState::LocalRemoved(_) = htlc.state {
4008 have_updates = true;
4010 if have_updates { break; }
4013 panic!("Cannot create commitment tx until we have some updates to send");
4015 self.send_commitment_no_status_check(logger)
4017 /// Only fails in case of bad keys
4018 fn send_commitment_no_status_check<L: Deref>(&mut self, logger: &L) -> Result<(msgs::CommitmentSigned, ChannelMonitorUpdate), ChannelError> where L::Target: Logger {
4019 // We can upgrade the status of some HTLCs that are waiting on a commitment, even if we
4020 // fail to generate this, we still are at least at a position where upgrading their status
4022 for htlc in self.pending_inbound_htlcs.iter_mut() {
4023 let new_state = if let &InboundHTLCState::AwaitingRemoteRevokeToAnnounce(ref forward_info) = &htlc.state {
4024 Some(InboundHTLCState::AwaitingAnnouncedRemoteRevoke(forward_info.clone()))
4026 if let Some(state) = new_state {
4030 for htlc in self.pending_outbound_htlcs.iter_mut() {
4031 if let Some(fail_reason) = if let &mut OutboundHTLCState::AwaitingRemoteRevokeToRemove(ref mut fail_reason) = &mut htlc.state {
4032 Some(fail_reason.take())
4034 htlc.state = OutboundHTLCState::AwaitingRemovedRemoteRevoke(fail_reason);
4037 self.resend_order = RAACommitmentOrder::RevokeAndACKFirst;
4039 let (res, counterparty_commitment_txid, htlcs) = match self.send_commitment_no_state_update(logger) {
4040 Ok((res, (counterparty_commitment_tx, mut htlcs))) => {
4041 // Update state now that we've passed all the can-fail calls...
4042 let htlcs_no_ref: Vec<(HTLCOutputInCommitment, Option<Box<HTLCSource>>)> =
4043 htlcs.drain(..).map(|(htlc, htlc_source)| (htlc, htlc_source.map(|source_ref| Box::new(source_ref.clone())))).collect();
4044 (res, counterparty_commitment_tx, htlcs_no_ref)
4046 Err(e) => return Err(e),
4049 self.latest_monitor_update_id += 1;
4050 let monitor_update = ChannelMonitorUpdate {
4051 update_id: self.latest_monitor_update_id,
4052 updates: vec![ChannelMonitorUpdateStep::LatestCounterpartyCommitmentTXInfo {
4053 commitment_txid: counterparty_commitment_txid,
4054 htlc_outputs: htlcs.clone(),
4055 commitment_number: self.cur_counterparty_commitment_transaction_number,
4056 their_revocation_point: self.counterparty_cur_commitment_point.unwrap()
4059 self.channel_state |= ChannelState::AwaitingRemoteRevoke as u32;
4060 Ok((res, monitor_update))
4063 /// Only fails in case of bad keys. Used for channel_reestablish commitment_signed generation
4064 /// when we shouldn't change HTLC/channel state.
4065 fn send_commitment_no_state_update<L: Deref>(&self, logger: &L) -> Result<(msgs::CommitmentSigned, (Txid, Vec<(HTLCOutputInCommitment, Option<&HTLCSource>)>)), ChannelError> where L::Target: Logger {
4066 let mut feerate_per_kw = self.feerate_per_kw;
4067 if let Some(feerate) = self.pending_update_fee {
4068 if self.is_outbound() {
4069 feerate_per_kw = feerate;
4073 let counterparty_keys = self.build_remote_transaction_keys()?;
4074 let counterparty_commitment_tx = self.build_commitment_transaction(self.cur_counterparty_commitment_transaction_number, &counterparty_keys, false, true, feerate_per_kw, logger);
4075 let counterparty_commitment_txid = counterparty_commitment_tx.0.trust().txid();
4076 let (signature, htlc_signatures);
4078 #[cfg(any(test, feature = "fuzztarget"))]
4080 if !self.is_outbound() {
4081 let projected_commit_tx_info = self.next_remote_commitment_tx_fee_info_cached.lock().unwrap().take();
4082 *self.next_local_commitment_tx_fee_info_cached.lock().unwrap() = None;
4083 if let Some(info) = projected_commit_tx_info {
4084 let total_pending_htlcs = self.pending_inbound_htlcs.len() + self.pending_outbound_htlcs.len();
4085 if info.total_pending_htlcs == total_pending_htlcs
4086 && info.next_holder_htlc_id == self.next_holder_htlc_id
4087 && info.next_counterparty_htlc_id == self.next_counterparty_htlc_id
4088 && info.feerate == self.feerate_per_kw {
4089 let actual_fee = self.commit_tx_fee_msat(counterparty_commitment_tx.1);
4090 assert_eq!(actual_fee, info.fee);
4097 let mut htlcs = Vec::with_capacity(counterparty_commitment_tx.2.len());
4098 for &(ref htlc, _) in counterparty_commitment_tx.2.iter() {
4102 let res = self.holder_signer.sign_counterparty_commitment(&counterparty_commitment_tx.0, &self.secp_ctx)
4103 .map_err(|_| ChannelError::Close("Failed to get signatures for new commitment_signed".to_owned()))?;
4105 htlc_signatures = res.1;
4107 log_trace!(logger, "Signed remote commitment tx {} (txid {}) with redeemscript {} -> {}",
4108 encode::serialize_hex(&counterparty_commitment_tx.0.trust().built_transaction().transaction),
4109 &counterparty_commitment_txid,
4110 encode::serialize_hex(&self.get_funding_redeemscript()),
4111 log_bytes!(signature.serialize_compact()[..]));
4113 for (ref htlc_sig, ref htlc) in htlc_signatures.iter().zip(htlcs) {
4114 log_trace!(logger, "Signed remote HTLC tx {} with redeemscript {} with pubkey {} -> {}",
4115 encode::serialize_hex(&chan_utils::build_htlc_transaction(&counterparty_commitment_txid, feerate_per_kw, self.get_holder_selected_contest_delay(), htlc, &counterparty_keys.broadcaster_delayed_payment_key, &counterparty_keys.revocation_key)),
4116 encode::serialize_hex(&chan_utils::get_htlc_redeemscript(&htlc, &counterparty_keys)),
4117 log_bytes!(counterparty_keys.broadcaster_htlc_key.serialize()),
4118 log_bytes!(htlc_sig.serialize_compact()[..]));
4122 Ok((msgs::CommitmentSigned {
4123 channel_id: self.channel_id,
4126 }, (counterparty_commitment_txid, counterparty_commitment_tx.2)))
4129 /// Adds a pending outbound HTLC to this channel, and creates a signed commitment transaction
4130 /// to send to the remote peer in one go.
4131 /// Shorthand for calling send_htlc() followed by send_commitment(), see docs on those for
4133 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 {
4134 match self.send_htlc(amount_msat, payment_hash, cltv_expiry, source, onion_routing_packet)? {
4135 Some(update_add_htlc) => {
4136 let (commitment_signed, monitor_update) = self.send_commitment_no_status_check(logger)?;
4137 Ok(Some((update_add_htlc, commitment_signed, monitor_update)))
4143 /// Get forwarding information for the counterparty.
4144 pub fn counterparty_forwarding_info(&self) -> Option<CounterpartyForwardingInfo> {
4145 self.counterparty_forwarding_info.clone()
4148 pub fn channel_update(&mut self, msg: &msgs::ChannelUpdate) -> Result<(), ChannelError> {
4149 let usable_channel_value_msat = (self.channel_value_satoshis - self.counterparty_selected_channel_reserve_satoshis) * 1000;
4150 if msg.contents.htlc_minimum_msat >= usable_channel_value_msat {
4151 return Err(ChannelError::Close("Minimum htlc value is greater than channel value".to_string()));
4153 self.counterparty_forwarding_info = Some(CounterpartyForwardingInfo {
4154 fee_base_msat: msg.contents.fee_base_msat,
4155 fee_proportional_millionths: msg.contents.fee_proportional_millionths,
4156 cltv_expiry_delta: msg.contents.cltv_expiry_delta
4162 /// Begins the shutdown process, getting a message for the remote peer and returning all
4163 /// holding cell HTLCs for payment failure.
4164 pub fn get_shutdown(&mut self) -> Result<(msgs::Shutdown, Vec<(HTLCSource, PaymentHash)>), APIError> {
4165 for htlc in self.pending_outbound_htlcs.iter() {
4166 if let OutboundHTLCState::LocalAnnounced(_) = htlc.state {
4167 return Err(APIError::APIMisuseError{err: "Cannot begin shutdown with pending HTLCs. Process pending events first".to_owned()});
4170 if self.channel_state & BOTH_SIDES_SHUTDOWN_MASK != 0 {
4171 if (self.channel_state & ChannelState::LocalShutdownSent as u32) == ChannelState::LocalShutdownSent as u32 {
4172 return Err(APIError::APIMisuseError{err: "Shutdown already in progress".to_owned()});
4174 else if (self.channel_state & ChannelState::RemoteShutdownSent as u32) == ChannelState::RemoteShutdownSent as u32 {
4175 return Err(APIError::ChannelUnavailable{err: "Shutdown already in progress by remote".to_owned()});
4178 assert_eq!(self.channel_state & ChannelState::ShutdownComplete as u32, 0);
4179 if self.channel_state & (ChannelState::PeerDisconnected as u32 | ChannelState::MonitorUpdateFailed as u32) != 0 {
4180 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()});
4183 let closing_script = self.get_closing_scriptpubkey();
4185 // From here on out, we may not fail!
4186 if self.channel_state < ChannelState::FundingSent as u32 {
4187 self.channel_state = ChannelState::ShutdownComplete as u32;
4189 self.channel_state |= ChannelState::LocalShutdownSent as u32;
4191 self.update_time_counter += 1;
4193 // Go ahead and drop holding cell updates as we'd rather fail payments than wait to send
4194 // our shutdown until we've committed all of the pending changes.
4195 self.holding_cell_update_fee = None;
4196 let mut dropped_outbound_htlcs = Vec::with_capacity(self.holding_cell_htlc_updates.len());
4197 self.holding_cell_htlc_updates.retain(|htlc_update| {
4199 &HTLCUpdateAwaitingACK::AddHTLC { ref payment_hash, ref source, .. } => {
4200 dropped_outbound_htlcs.push((source.clone(), payment_hash.clone()));
4207 Ok((msgs::Shutdown {
4208 channel_id: self.channel_id,
4209 scriptpubkey: closing_script,
4210 }, dropped_outbound_htlcs))
4213 /// Gets the latest commitment transaction and any dependent transactions for relay (forcing
4214 /// shutdown of this channel - no more calls into this Channel may be made afterwards except
4215 /// those explicitly stated to be allowed after shutdown completes, eg some simple getters).
4216 /// Also returns the list of payment_hashes for channels which we can safely fail backwards
4217 /// immediately (others we will have to allow to time out).
4218 pub fn force_shutdown(&mut self, should_broadcast: bool) -> (Option<(OutPoint, ChannelMonitorUpdate)>, Vec<(HTLCSource, PaymentHash)>) {
4219 // Note that we MUST only generate a monitor update that indicates force-closure - we're
4220 // called during initialization prior to the chain_monitor in the encompassing ChannelManager
4221 // being fully configured in some cases. Thus, its likely any monitor events we generate will
4222 // be delayed in being processed! See the docs for `ChannelManagerReadArgs` for more.
4223 assert!(self.channel_state != ChannelState::ShutdownComplete as u32);
4225 // We go ahead and "free" any holding cell HTLCs or HTLCs we haven't yet committed to and
4226 // return them to fail the payment.
4227 let mut dropped_outbound_htlcs = Vec::with_capacity(self.holding_cell_htlc_updates.len());
4228 for htlc_update in self.holding_cell_htlc_updates.drain(..) {
4230 HTLCUpdateAwaitingACK::AddHTLC { source, payment_hash, .. } => {
4231 dropped_outbound_htlcs.push((source, payment_hash));
4236 let monitor_update = if let Some(funding_txo) = self.get_funding_txo() {
4237 // If we haven't yet exchanged funding signatures (ie channel_state < FundingSent),
4238 // returning a channel monitor update here would imply a channel monitor update before
4239 // we even registered the channel monitor to begin with, which is invalid.
4240 // Thus, if we aren't actually at a point where we could conceivably broadcast the
4241 // funding transaction, don't return a funding txo (which prevents providing the
4242 // monitor update to the user, even if we return one).
4243 // See test_duplicate_chan_id and test_pre_lockin_no_chan_closed_update for more.
4244 if self.channel_state & (ChannelState::FundingSent as u32 | ChannelState::ChannelFunded as u32 | ChannelState::ShutdownComplete as u32) != 0 {
4245 self.latest_monitor_update_id += 1;
4246 Some((funding_txo, ChannelMonitorUpdate {
4247 update_id: self.latest_monitor_update_id,
4248 updates: vec![ChannelMonitorUpdateStep::ChannelForceClosed { should_broadcast }],
4253 self.channel_state = ChannelState::ShutdownComplete as u32;
4254 self.update_time_counter += 1;
4255 (monitor_update, dropped_outbound_htlcs)
4259 fn is_unsupported_shutdown_script(their_features: &InitFeatures, script: &Script) -> bool {
4260 // We restrain shutdown scripts to standards forms to avoid transactions not propagating on the p2p tx-relay network
4262 // BOLT 2 says we must only send a scriptpubkey of certain standard forms,
4263 // which for a a BIP-141-compliant witness program is at max 42 bytes in length.
4264 // So don't let the remote peer feed us some super fee-heavy script.
4265 let is_script_too_long = script.len() > 42;
4266 if is_script_too_long {
4270 if their_features.supports_shutdown_anysegwit() && script.is_witness_program() && script.as_bytes()[0] != OP_PUSHBYTES_0.into_u8() {
4274 return !script.is_p2pkh() && !script.is_p2sh() && !script.is_v0_p2wpkh() && !script.is_v0_p2wsh()
4277 const SERIALIZATION_VERSION: u8 = 1;
4278 const MIN_SERIALIZATION_VERSION: u8 = 1;
4280 impl Writeable for InboundHTLCRemovalReason {
4281 fn write<W: Writer>(&self, writer: &mut W) -> Result<(), ::std::io::Error> {
4283 &InboundHTLCRemovalReason::FailRelay(ref error_packet) => {
4285 error_packet.write(writer)?;
4287 &InboundHTLCRemovalReason::FailMalformed((ref onion_hash, ref err_code)) => {
4289 onion_hash.write(writer)?;
4290 err_code.write(writer)?;
4292 &InboundHTLCRemovalReason::Fulfill(ref payment_preimage) => {
4294 payment_preimage.write(writer)?;
4301 impl Readable for InboundHTLCRemovalReason {
4302 fn read<R: ::std::io::Read>(reader: &mut R) -> Result<Self, DecodeError> {
4303 Ok(match <u8 as Readable>::read(reader)? {
4304 0 => InboundHTLCRemovalReason::FailRelay(Readable::read(reader)?),
4305 1 => InboundHTLCRemovalReason::FailMalformed((Readable::read(reader)?, Readable::read(reader)?)),
4306 2 => InboundHTLCRemovalReason::Fulfill(Readable::read(reader)?),
4307 _ => return Err(DecodeError::InvalidValue),
4312 impl<Signer: Sign> Writeable for Channel<Signer> {
4313 fn write<W: Writer>(&self, writer: &mut W) -> Result<(), ::std::io::Error> {
4314 // Note that we write out as if remove_uncommitted_htlcs_and_mark_paused had just been
4315 // called but include holding cell updates (and obviously we don't modify self).
4317 writer.write_all(&[SERIALIZATION_VERSION; 1])?;
4318 writer.write_all(&[MIN_SERIALIZATION_VERSION; 1])?;
4320 self.user_id.write(writer)?;
4321 self.config.write(writer)?;
4323 self.channel_id.write(writer)?;
4324 (self.channel_state | ChannelState::PeerDisconnected as u32).write(writer)?;
4325 self.channel_value_satoshis.write(writer)?;
4327 self.latest_monitor_update_id.write(writer)?;
4329 let mut key_data = VecWriter(Vec::new());
4330 self.holder_signer.write(&mut key_data)?;
4331 assert!(key_data.0.len() < std::usize::MAX);
4332 assert!(key_data.0.len() < std::u32::MAX as usize);
4333 (key_data.0.len() as u32).write(writer)?;
4334 writer.write_all(&key_data.0[..])?;
4336 self.shutdown_pubkey.write(writer)?;
4337 self.destination_script.write(writer)?;
4339 self.cur_holder_commitment_transaction_number.write(writer)?;
4340 self.cur_counterparty_commitment_transaction_number.write(writer)?;
4341 self.value_to_self_msat.write(writer)?;
4343 let mut dropped_inbound_htlcs = 0;
4344 for htlc in self.pending_inbound_htlcs.iter() {
4345 if let InboundHTLCState::RemoteAnnounced(_) = htlc.state {
4346 dropped_inbound_htlcs += 1;
4349 (self.pending_inbound_htlcs.len() as u64 - dropped_inbound_htlcs).write(writer)?;
4350 for htlc in self.pending_inbound_htlcs.iter() {
4351 if let &InboundHTLCState::RemoteAnnounced(_) = &htlc.state {
4354 htlc.htlc_id.write(writer)?;
4355 htlc.amount_msat.write(writer)?;
4356 htlc.cltv_expiry.write(writer)?;
4357 htlc.payment_hash.write(writer)?;
4359 &InboundHTLCState::RemoteAnnounced(_) => unreachable!(),
4360 &InboundHTLCState::AwaitingRemoteRevokeToAnnounce(ref htlc_state) => {
4362 htlc_state.write(writer)?;
4364 &InboundHTLCState::AwaitingAnnouncedRemoteRevoke(ref htlc_state) => {
4366 htlc_state.write(writer)?;
4368 &InboundHTLCState::Committed => {
4371 &InboundHTLCState::LocalRemoved(ref removal_reason) => {
4373 removal_reason.write(writer)?;
4378 (self.pending_outbound_htlcs.len() as u64).write(writer)?;
4379 for htlc in self.pending_outbound_htlcs.iter() {
4380 htlc.htlc_id.write(writer)?;
4381 htlc.amount_msat.write(writer)?;
4382 htlc.cltv_expiry.write(writer)?;
4383 htlc.payment_hash.write(writer)?;
4384 htlc.source.write(writer)?;
4386 &OutboundHTLCState::LocalAnnounced(ref onion_packet) => {
4388 onion_packet.write(writer)?;
4390 &OutboundHTLCState::Committed => {
4393 &OutboundHTLCState::RemoteRemoved(ref fail_reason) => {
4395 fail_reason.write(writer)?;
4397 &OutboundHTLCState::AwaitingRemoteRevokeToRemove(ref fail_reason) => {
4399 fail_reason.write(writer)?;
4401 &OutboundHTLCState::AwaitingRemovedRemoteRevoke(ref fail_reason) => {
4403 fail_reason.write(writer)?;
4408 (self.holding_cell_htlc_updates.len() as u64).write(writer)?;
4409 for update in self.holding_cell_htlc_updates.iter() {
4411 &HTLCUpdateAwaitingACK::AddHTLC { ref amount_msat, ref cltv_expiry, ref payment_hash, ref source, ref onion_routing_packet } => {
4413 amount_msat.write(writer)?;
4414 cltv_expiry.write(writer)?;
4415 payment_hash.write(writer)?;
4416 source.write(writer)?;
4417 onion_routing_packet.write(writer)?;
4419 &HTLCUpdateAwaitingACK::ClaimHTLC { ref payment_preimage, ref htlc_id } => {
4421 payment_preimage.write(writer)?;
4422 htlc_id.write(writer)?;
4424 &HTLCUpdateAwaitingACK::FailHTLC { ref htlc_id, ref err_packet } => {
4426 htlc_id.write(writer)?;
4427 err_packet.write(writer)?;
4432 match self.resend_order {
4433 RAACommitmentOrder::CommitmentFirst => 0u8.write(writer)?,
4434 RAACommitmentOrder::RevokeAndACKFirst => 1u8.write(writer)?,
4437 self.monitor_pending_funding_locked.write(writer)?;
4438 self.monitor_pending_revoke_and_ack.write(writer)?;
4439 self.monitor_pending_commitment_signed.write(writer)?;
4441 (self.monitor_pending_forwards.len() as u64).write(writer)?;
4442 for &(ref pending_forward, ref htlc_id) in self.monitor_pending_forwards.iter() {
4443 pending_forward.write(writer)?;
4444 htlc_id.write(writer)?;
4447 (self.monitor_pending_failures.len() as u64).write(writer)?;
4448 for &(ref htlc_source, ref payment_hash, ref fail_reason) in self.monitor_pending_failures.iter() {
4449 htlc_source.write(writer)?;
4450 payment_hash.write(writer)?;
4451 fail_reason.write(writer)?;
4454 self.pending_update_fee.write(writer)?;
4455 self.holding_cell_update_fee.write(writer)?;
4457 self.next_holder_htlc_id.write(writer)?;
4458 (self.next_counterparty_htlc_id - dropped_inbound_htlcs).write(writer)?;
4459 self.update_time_counter.write(writer)?;
4460 self.feerate_per_kw.write(writer)?;
4462 match self.last_sent_closing_fee {
4463 Some((feerate, fee, sig)) => {
4465 feerate.write(writer)?;
4469 None => 0u8.write(writer)?,
4472 self.funding_tx_confirmed_in.write(writer)?;
4473 self.short_channel_id.write(writer)?;
4474 self.funding_tx_confirmations.write(writer)?;
4476 self.counterparty_dust_limit_satoshis.write(writer)?;
4477 self.holder_dust_limit_satoshis.write(writer)?;
4478 self.counterparty_max_htlc_value_in_flight_msat.write(writer)?;
4479 self.counterparty_selected_channel_reserve_satoshis.write(writer)?;
4480 self.counterparty_htlc_minimum_msat.write(writer)?;
4481 self.holder_htlc_minimum_msat.write(writer)?;
4482 self.counterparty_max_accepted_htlcs.write(writer)?;
4483 self.minimum_depth.write(writer)?;
4485 match &self.counterparty_forwarding_info {
4488 info.fee_base_msat.write(writer)?;
4489 info.fee_proportional_millionths.write(writer)?;
4490 info.cltv_expiry_delta.write(writer)?;
4492 None => 0u8.write(writer)?
4495 self.channel_transaction_parameters.write(writer)?;
4496 self.funding_transaction.write(writer)?;
4498 self.counterparty_cur_commitment_point.write(writer)?;
4499 self.counterparty_prev_commitment_point.write(writer)?;
4500 self.counterparty_node_id.write(writer)?;
4502 self.counterparty_shutdown_scriptpubkey.write(writer)?;
4504 self.commitment_secrets.write(writer)?;
4509 const MAX_ALLOC_SIZE: usize = 64*1024;
4510 impl<'a, Signer: Sign, K: Deref> ReadableArgs<&'a K> for Channel<Signer>
4511 where K::Target: KeysInterface<Signer = Signer> {
4512 fn read<R : ::std::io::Read>(reader: &mut R, keys_source: &'a K) -> Result<Self, DecodeError> {
4513 let _ver: u8 = Readable::read(reader)?;
4514 let min_ver: u8 = Readable::read(reader)?;
4515 if min_ver > SERIALIZATION_VERSION {
4516 return Err(DecodeError::UnknownVersion);
4519 let user_id = Readable::read(reader)?;
4520 let config: ChannelConfig = Readable::read(reader)?;
4522 let channel_id = Readable::read(reader)?;
4523 let channel_state = Readable::read(reader)?;
4524 let channel_value_satoshis = Readable::read(reader)?;
4526 let latest_monitor_update_id = Readable::read(reader)?;
4528 let keys_len: u32 = Readable::read(reader)?;
4529 let mut keys_data = Vec::with_capacity(cmp::min(keys_len as usize, MAX_ALLOC_SIZE));
4530 while keys_data.len() != keys_len as usize {
4531 // Read 1KB at a time to avoid accidentally allocating 4GB on corrupted channel keys
4532 let mut data = [0; 1024];
4533 let read_slice = &mut data[0..cmp::min(1024, keys_len as usize - keys_data.len())];
4534 reader.read_exact(read_slice)?;
4535 keys_data.extend_from_slice(read_slice);
4537 let holder_signer = keys_source.read_chan_signer(&keys_data)?;
4539 let shutdown_pubkey = Readable::read(reader)?;
4540 let destination_script = Readable::read(reader)?;
4542 let cur_holder_commitment_transaction_number = Readable::read(reader)?;
4543 let cur_counterparty_commitment_transaction_number = Readable::read(reader)?;
4544 let value_to_self_msat = Readable::read(reader)?;
4546 let pending_inbound_htlc_count: u64 = Readable::read(reader)?;
4547 let mut pending_inbound_htlcs = Vec::with_capacity(cmp::min(pending_inbound_htlc_count as usize, OUR_MAX_HTLCS as usize));
4548 for _ in 0..pending_inbound_htlc_count {
4549 pending_inbound_htlcs.push(InboundHTLCOutput {
4550 htlc_id: Readable::read(reader)?,
4551 amount_msat: Readable::read(reader)?,
4552 cltv_expiry: Readable::read(reader)?,
4553 payment_hash: Readable::read(reader)?,
4554 state: match <u8 as Readable>::read(reader)? {
4555 1 => InboundHTLCState::AwaitingRemoteRevokeToAnnounce(Readable::read(reader)?),
4556 2 => InboundHTLCState::AwaitingAnnouncedRemoteRevoke(Readable::read(reader)?),
4557 3 => InboundHTLCState::Committed,
4558 4 => InboundHTLCState::LocalRemoved(Readable::read(reader)?),
4559 _ => return Err(DecodeError::InvalidValue),
4564 let pending_outbound_htlc_count: u64 = Readable::read(reader)?;
4565 let mut pending_outbound_htlcs = Vec::with_capacity(cmp::min(pending_outbound_htlc_count as usize, OUR_MAX_HTLCS as usize));
4566 for _ in 0..pending_outbound_htlc_count {
4567 pending_outbound_htlcs.push(OutboundHTLCOutput {
4568 htlc_id: Readable::read(reader)?,
4569 amount_msat: Readable::read(reader)?,
4570 cltv_expiry: Readable::read(reader)?,
4571 payment_hash: Readable::read(reader)?,
4572 source: Readable::read(reader)?,
4573 state: match <u8 as Readable>::read(reader)? {
4574 0 => OutboundHTLCState::LocalAnnounced(Box::new(Readable::read(reader)?)),
4575 1 => OutboundHTLCState::Committed,
4576 2 => OutboundHTLCState::RemoteRemoved(Readable::read(reader)?),
4577 3 => OutboundHTLCState::AwaitingRemoteRevokeToRemove(Readable::read(reader)?),
4578 4 => OutboundHTLCState::AwaitingRemovedRemoteRevoke(Readable::read(reader)?),
4579 _ => return Err(DecodeError::InvalidValue),
4584 let holding_cell_htlc_update_count: u64 = Readable::read(reader)?;
4585 let mut holding_cell_htlc_updates = Vec::with_capacity(cmp::min(holding_cell_htlc_update_count as usize, OUR_MAX_HTLCS as usize*2));
4586 for _ in 0..holding_cell_htlc_update_count {
4587 holding_cell_htlc_updates.push(match <u8 as Readable>::read(reader)? {
4588 0 => HTLCUpdateAwaitingACK::AddHTLC {
4589 amount_msat: Readable::read(reader)?,
4590 cltv_expiry: Readable::read(reader)?,
4591 payment_hash: Readable::read(reader)?,
4592 source: Readable::read(reader)?,
4593 onion_routing_packet: Readable::read(reader)?,
4595 1 => HTLCUpdateAwaitingACK::ClaimHTLC {
4596 payment_preimage: Readable::read(reader)?,
4597 htlc_id: Readable::read(reader)?,
4599 2 => HTLCUpdateAwaitingACK::FailHTLC {
4600 htlc_id: Readable::read(reader)?,
4601 err_packet: Readable::read(reader)?,
4603 _ => return Err(DecodeError::InvalidValue),
4607 let resend_order = match <u8 as Readable>::read(reader)? {
4608 0 => RAACommitmentOrder::CommitmentFirst,
4609 1 => RAACommitmentOrder::RevokeAndACKFirst,
4610 _ => return Err(DecodeError::InvalidValue),
4613 let monitor_pending_funding_locked = Readable::read(reader)?;
4614 let monitor_pending_revoke_and_ack = Readable::read(reader)?;
4615 let monitor_pending_commitment_signed = Readable::read(reader)?;
4617 let monitor_pending_forwards_count: u64 = Readable::read(reader)?;
4618 let mut monitor_pending_forwards = Vec::with_capacity(cmp::min(monitor_pending_forwards_count as usize, OUR_MAX_HTLCS as usize));
4619 for _ in 0..monitor_pending_forwards_count {
4620 monitor_pending_forwards.push((Readable::read(reader)?, Readable::read(reader)?));
4623 let monitor_pending_failures_count: u64 = Readable::read(reader)?;
4624 let mut monitor_pending_failures = Vec::with_capacity(cmp::min(monitor_pending_failures_count as usize, OUR_MAX_HTLCS as usize));
4625 for _ in 0..monitor_pending_failures_count {
4626 monitor_pending_failures.push((Readable::read(reader)?, Readable::read(reader)?, Readable::read(reader)?));
4629 let pending_update_fee = Readable::read(reader)?;
4630 let holding_cell_update_fee = Readable::read(reader)?;
4632 let next_holder_htlc_id = Readable::read(reader)?;
4633 let next_counterparty_htlc_id = Readable::read(reader)?;
4634 let update_time_counter = Readable::read(reader)?;
4635 let feerate_per_kw = Readable::read(reader)?;
4637 let last_sent_closing_fee = match <u8 as Readable>::read(reader)? {
4639 1 => Some((Readable::read(reader)?, Readable::read(reader)?, Readable::read(reader)?)),
4640 _ => return Err(DecodeError::InvalidValue),
4643 let funding_tx_confirmed_in = Readable::read(reader)?;
4644 let short_channel_id = Readable::read(reader)?;
4645 let funding_tx_confirmations = Readable::read(reader)?;
4647 let counterparty_dust_limit_satoshis = Readable::read(reader)?;
4648 let holder_dust_limit_satoshis = Readable::read(reader)?;
4649 let counterparty_max_htlc_value_in_flight_msat = Readable::read(reader)?;
4650 let counterparty_selected_channel_reserve_satoshis = Readable::read(reader)?;
4651 let counterparty_htlc_minimum_msat = Readable::read(reader)?;
4652 let holder_htlc_minimum_msat = Readable::read(reader)?;
4653 let counterparty_max_accepted_htlcs = Readable::read(reader)?;
4654 let minimum_depth = Readable::read(reader)?;
4656 let counterparty_forwarding_info = match <u8 as Readable>::read(reader)? {
4658 1 => Some(CounterpartyForwardingInfo {
4659 fee_base_msat: Readable::read(reader)?,
4660 fee_proportional_millionths: Readable::read(reader)?,
4661 cltv_expiry_delta: Readable::read(reader)?,
4663 _ => return Err(DecodeError::InvalidValue),
4666 let channel_parameters = Readable::read(reader)?;
4667 let funding_transaction = Readable::read(reader)?;
4669 let counterparty_cur_commitment_point = Readable::read(reader)?;
4671 let counterparty_prev_commitment_point = Readable::read(reader)?;
4672 let counterparty_node_id = Readable::read(reader)?;
4674 let counterparty_shutdown_scriptpubkey = Readable::read(reader)?;
4675 let commitment_secrets = Readable::read(reader)?;
4677 let mut secp_ctx = Secp256k1::new();
4678 secp_ctx.seeded_randomize(&keys_source.get_secure_random_bytes());
4687 channel_value_satoshis,
4689 latest_monitor_update_id,
4695 cur_holder_commitment_transaction_number,
4696 cur_counterparty_commitment_transaction_number,
4699 pending_inbound_htlcs,
4700 pending_outbound_htlcs,
4701 holding_cell_htlc_updates,
4705 monitor_pending_funding_locked,
4706 monitor_pending_revoke_and_ack,
4707 monitor_pending_commitment_signed,
4708 monitor_pending_forwards,
4709 monitor_pending_failures,
4712 holding_cell_update_fee,
4713 next_holder_htlc_id,
4714 next_counterparty_htlc_id,
4715 update_time_counter,
4718 #[cfg(debug_assertions)]
4719 holder_max_commitment_tx_output: ::std::sync::Mutex::new((0, 0)),
4720 #[cfg(debug_assertions)]
4721 counterparty_max_commitment_tx_output: ::std::sync::Mutex::new((0, 0)),
4723 last_sent_closing_fee,
4725 funding_tx_confirmed_in,
4727 funding_tx_confirmations,
4729 counterparty_dust_limit_satoshis,
4730 holder_dust_limit_satoshis,
4731 counterparty_max_htlc_value_in_flight_msat,
4732 counterparty_selected_channel_reserve_satoshis,
4733 counterparty_htlc_minimum_msat,
4734 holder_htlc_minimum_msat,
4735 counterparty_max_accepted_htlcs,
4738 counterparty_forwarding_info,
4740 channel_transaction_parameters: channel_parameters,
4741 funding_transaction,
4743 counterparty_cur_commitment_point,
4744 counterparty_prev_commitment_point,
4745 counterparty_node_id,
4747 counterparty_shutdown_scriptpubkey,
4751 network_sync: UpdateStatus::Fresh,
4753 #[cfg(any(test, feature = "fuzztarget"))]
4754 next_local_commitment_tx_fee_info_cached: Mutex::new(None),
4755 #[cfg(any(test, feature = "fuzztarget"))]
4756 next_remote_commitment_tx_fee_info_cached: Mutex::new(None),
4763 use bitcoin::util::bip143;
4764 use bitcoin::consensus::encode::serialize;
4765 use bitcoin::blockdata::script::{Script, Builder};
4766 use bitcoin::blockdata::transaction::{Transaction, TxOut, SigHashType};
4767 use bitcoin::blockdata::constants::genesis_block;
4768 use bitcoin::blockdata::opcodes;
4769 use bitcoin::network::constants::Network;
4770 use bitcoin::hashes::hex::FromHex;
4772 use ln::channelmanager::{HTLCSource, PaymentPreimage, PaymentHash};
4773 use ln::channel::{Channel,Sign,InboundHTLCOutput,OutboundHTLCOutput,InboundHTLCState,OutboundHTLCState,HTLCOutputInCommitment,HTLCCandidate,HTLCInitiator,TxCreationKeys};
4774 use ln::channel::MAX_FUNDING_SATOSHIS;
4775 use ln::features::InitFeatures;
4776 use ln::msgs::{ChannelUpdate, DataLossProtect, DecodeError, OptionalField, UnsignedChannelUpdate};
4778 use ln::chan_utils::{ChannelPublicKeys, HolderCommitmentTransaction, CounterpartyChannelTransactionParameters, HTLC_SUCCESS_TX_WEIGHT, HTLC_TIMEOUT_TX_WEIGHT};
4779 use chain::chaininterface::{FeeEstimator,ConfirmationTarget};
4780 use chain::keysinterface::{InMemorySigner, KeysInterface};
4781 use chain::transaction::OutPoint;
4782 use util::config::UserConfig;
4783 use util::enforcing_trait_impls::EnforcingSigner;
4784 use util::test_utils;
4785 use util::logger::Logger;
4786 use bitcoin::secp256k1::{Secp256k1, Message, Signature, All};
4787 use bitcoin::secp256k1::ffi::Signature as FFISignature;
4788 use bitcoin::secp256k1::key::{SecretKey,PublicKey};
4789 use bitcoin::hashes::sha256::Hash as Sha256;
4790 use bitcoin::hashes::Hash;
4791 use bitcoin::hash_types::{Txid, WPubkeyHash};
4794 struct TestFeeEstimator {
4797 impl FeeEstimator for TestFeeEstimator {
4798 fn get_est_sat_per_1000_weight(&self, _: ConfirmationTarget) -> u32 {
4804 fn test_max_funding_satoshis() {
4805 assert!(MAX_FUNDING_SATOSHIS <= 21_000_000 * 100_000_000,
4806 "MAX_FUNDING_SATOSHIS is greater than all satoshis in existence");
4810 signer: InMemorySigner,
4812 impl KeysInterface for Keys {
4813 type Signer = InMemorySigner;
4815 fn get_node_secret(&self) -> SecretKey { panic!(); }
4816 fn get_destination_script(&self) -> Script {
4817 let secp_ctx = Secp256k1::signing_only();
4818 let channel_monitor_claim_key = SecretKey::from_slice(&hex::decode("0fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff").unwrap()[..]).unwrap();
4819 let channel_monitor_claim_key_hash = WPubkeyHash::hash(&PublicKey::from_secret_key(&secp_ctx, &channel_monitor_claim_key).serialize());
4820 Builder::new().push_opcode(opcodes::all::OP_PUSHBYTES_0).push_slice(&channel_monitor_claim_key_hash[..]).into_script()
4823 fn get_shutdown_pubkey(&self) -> PublicKey {
4824 let secp_ctx = Secp256k1::signing_only();
4825 let channel_close_key = SecretKey::from_slice(&hex::decode("0fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff").unwrap()[..]).unwrap();
4826 PublicKey::from_secret_key(&secp_ctx, &channel_close_key)
4829 fn get_channel_signer(&self, _inbound: bool, _channel_value_satoshis: u64) -> InMemorySigner {
4832 fn get_secure_random_bytes(&self) -> [u8; 32] { [0; 32] }
4833 fn read_chan_signer(&self, _data: &[u8]) -> Result<Self::Signer, DecodeError> { panic!(); }
4836 fn public_from_secret_hex(secp_ctx: &Secp256k1<All>, hex: &str) -> PublicKey {
4837 PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&hex::decode(hex).unwrap()[..]).unwrap())
4840 // Check that, during channel creation, we use the same feerate in the open channel message
4841 // as we do in the Channel object creation itself.
4843 fn test_open_channel_msg_fee() {
4844 let original_fee = 253;
4845 let mut fee_est = TestFeeEstimator{fee_est: original_fee };
4846 let secp_ctx = Secp256k1::new();
4847 let seed = [42; 32];
4848 let network = Network::Testnet;
4849 let keys_provider = test_utils::TestKeysInterface::new(&seed, network);
4851 let node_a_node_id = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[42; 32]).unwrap());
4852 let config = UserConfig::default();
4853 let node_a_chan = Channel::<EnforcingSigner>::new_outbound(&&fee_est, &&keys_provider, node_a_node_id, 10000000, 100000, 42, &config).unwrap();
4855 // Now change the fee so we can check that the fee in the open_channel message is the
4856 // same as the old fee.
4857 fee_est.fee_est = 500;
4858 let open_channel_msg = node_a_chan.get_open_channel(genesis_block(network).header.block_hash());
4859 assert_eq!(open_channel_msg.feerate_per_kw, original_fee);
4863 fn test_holder_vs_counterparty_dust_limit() {
4864 // Test that when calculating the local and remote commitment transaction fees, the correct
4865 // dust limits are used.
4866 let feeest = TestFeeEstimator{fee_est: 15000};
4867 let secp_ctx = Secp256k1::new();
4868 let seed = [42; 32];
4869 let network = Network::Testnet;
4870 let keys_provider = test_utils::TestKeysInterface::new(&seed, network);
4872 // Go through the flow of opening a channel between two nodes, making sure
4873 // they have different dust limits.
4875 // Create Node A's channel pointing to Node B's pubkey
4876 let node_b_node_id = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[42; 32]).unwrap());
4877 let config = UserConfig::default();
4878 let mut node_a_chan = Channel::<EnforcingSigner>::new_outbound(&&feeest, &&keys_provider, node_b_node_id, 10000000, 100000, 42, &config).unwrap();
4880 // Create Node B's channel by receiving Node A's open_channel message
4881 // Make sure A's dust limit is as we expect.
4882 let open_channel_msg = node_a_chan.get_open_channel(genesis_block(network).header.block_hash());
4883 assert_eq!(open_channel_msg.dust_limit_satoshis, 1560);
4884 let node_b_node_id = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[7; 32]).unwrap());
4885 let node_b_chan = Channel::<EnforcingSigner>::new_from_req(&&feeest, &&keys_provider, node_b_node_id, InitFeatures::known(), &open_channel_msg, 7, &config).unwrap();
4887 // Node B --> Node A: accept channel, explicitly setting B's dust limit.
4888 let mut accept_channel_msg = node_b_chan.get_accept_channel();
4889 accept_channel_msg.dust_limit_satoshis = 546;
4890 node_a_chan.accept_channel(&accept_channel_msg, &config, InitFeatures::known()).unwrap();
4892 // Put some inbound and outbound HTLCs in A's channel.
4893 let htlc_amount_msat = 11_092_000; // put an amount below A's effective dust limit but above B's.
4894 node_a_chan.pending_inbound_htlcs.push(InboundHTLCOutput {
4896 amount_msat: htlc_amount_msat,
4897 payment_hash: PaymentHash(Sha256::hash(&[42; 32]).into_inner()),
4898 cltv_expiry: 300000000,
4899 state: InboundHTLCState::Committed,
4902 node_a_chan.pending_outbound_htlcs.push(OutboundHTLCOutput {
4904 amount_msat: htlc_amount_msat, // put an amount below A's dust amount but above B's.
4905 payment_hash: PaymentHash(Sha256::hash(&[43; 32]).into_inner()),
4906 cltv_expiry: 200000000,
4907 state: OutboundHTLCState::Committed,
4908 source: HTLCSource::OutboundRoute {
4910 session_priv: SecretKey::from_slice(&hex::decode("0fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff").unwrap()[..]).unwrap(),
4911 first_hop_htlc_msat: 548,
4915 // Make sure when Node A calculates their local commitment transaction, none of the HTLCs pass
4916 // the dust limit check.
4917 let htlc_candidate = HTLCCandidate::new(htlc_amount_msat, HTLCInitiator::LocalOffered);
4918 let local_commit_tx_fee = node_a_chan.next_local_commit_tx_fee_msat(htlc_candidate, None);
4919 let local_commit_fee_0_htlcs = node_a_chan.commit_tx_fee_msat(0);
4920 assert_eq!(local_commit_tx_fee, local_commit_fee_0_htlcs);
4922 // Finally, make sure that when Node A calculates the remote's commitment transaction fees, all
4923 // of the HTLCs are seen to be above the dust limit.
4924 node_a_chan.channel_transaction_parameters.is_outbound_from_holder = false;
4925 let remote_commit_fee_3_htlcs = node_a_chan.commit_tx_fee_msat(3);
4926 let htlc_candidate = HTLCCandidate::new(htlc_amount_msat, HTLCInitiator::LocalOffered);
4927 let remote_commit_tx_fee = node_a_chan.next_remote_commit_tx_fee_msat(htlc_candidate, None);
4928 assert_eq!(remote_commit_tx_fee, remote_commit_fee_3_htlcs);
4932 fn test_timeout_vs_success_htlc_dust_limit() {
4933 // Make sure that when `next_remote_commit_tx_fee_msat` and `next_local_commit_tx_fee_msat`
4934 // calculate the real dust limits for HTLCs (i.e. the dust limit given by the counterparty
4935 // *plus* the fees paid for the HTLC) they don't swap `HTLC_SUCCESS_TX_WEIGHT` for
4936 // `HTLC_TIMEOUT_TX_WEIGHT`, and vice versa.
4937 let fee_est = TestFeeEstimator{fee_est: 253 };
4938 let secp_ctx = Secp256k1::new();
4939 let seed = [42; 32];
4940 let network = Network::Testnet;
4941 let keys_provider = test_utils::TestKeysInterface::new(&seed, network);
4943 let node_id = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[42; 32]).unwrap());
4944 let config = UserConfig::default();
4945 let mut chan = Channel::<EnforcingSigner>::new_outbound(&&fee_est, &&keys_provider, node_id, 10000000, 100000, 42, &config).unwrap();
4947 let commitment_tx_fee_0_htlcs = chan.commit_tx_fee_msat(0);
4948 let commitment_tx_fee_1_htlc = chan.commit_tx_fee_msat(1);
4950 // If HTLC_SUCCESS_TX_WEIGHT and HTLC_TIMEOUT_TX_WEIGHT were swapped: then this HTLC would be
4951 // counted as dust when it shouldn't be.
4952 let htlc_amt_above_timeout = ((253 * HTLC_TIMEOUT_TX_WEIGHT / 1000) + chan.holder_dust_limit_satoshis + 1) * 1000;
4953 let htlc_candidate = HTLCCandidate::new(htlc_amt_above_timeout, HTLCInitiator::LocalOffered);
4954 let commitment_tx_fee = chan.next_local_commit_tx_fee_msat(htlc_candidate, None);
4955 assert_eq!(commitment_tx_fee, commitment_tx_fee_1_htlc);
4957 // If swapped: this HTLC would be counted as non-dust when it shouldn't be.
4958 let dust_htlc_amt_below_success = ((253 * HTLC_SUCCESS_TX_WEIGHT / 1000) + chan.holder_dust_limit_satoshis - 1) * 1000;
4959 let htlc_candidate = HTLCCandidate::new(dust_htlc_amt_below_success, HTLCInitiator::RemoteOffered);
4960 let commitment_tx_fee = chan.next_local_commit_tx_fee_msat(htlc_candidate, None);
4961 assert_eq!(commitment_tx_fee, commitment_tx_fee_0_htlcs);
4963 chan.channel_transaction_parameters.is_outbound_from_holder = false;
4965 // If swapped: this HTLC would be counted as non-dust when it shouldn't be.
4966 let dust_htlc_amt_above_timeout = ((253 * HTLC_TIMEOUT_TX_WEIGHT / 1000) + chan.counterparty_dust_limit_satoshis + 1) * 1000;
4967 let htlc_candidate = HTLCCandidate::new(dust_htlc_amt_above_timeout, HTLCInitiator::LocalOffered);
4968 let commitment_tx_fee = chan.next_remote_commit_tx_fee_msat(htlc_candidate, None);
4969 assert_eq!(commitment_tx_fee, commitment_tx_fee_0_htlcs);
4971 // If swapped: this HTLC would be counted as dust when it shouldn't be.
4972 let htlc_amt_below_success = ((253 * HTLC_SUCCESS_TX_WEIGHT / 1000) + chan.counterparty_dust_limit_satoshis - 1) * 1000;
4973 let htlc_candidate = HTLCCandidate::new(htlc_amt_below_success, HTLCInitiator::RemoteOffered);
4974 let commitment_tx_fee = chan.next_remote_commit_tx_fee_msat(htlc_candidate, None);
4975 assert_eq!(commitment_tx_fee, commitment_tx_fee_1_htlc);
4979 fn channel_reestablish_no_updates() {
4980 let feeest = TestFeeEstimator{fee_est: 15000};
4981 let logger = test_utils::TestLogger::new();
4982 let secp_ctx = Secp256k1::new();
4983 let seed = [42; 32];
4984 let network = Network::Testnet;
4985 let chain_hash = genesis_block(network).header.block_hash();
4986 let last_block_hash = chain_hash;
4987 let keys_provider = test_utils::TestKeysInterface::new(&seed, network);
4989 // Go through the flow of opening a channel between two nodes.
4991 // Create Node A's channel pointing to Node B's pubkey
4992 let node_b_node_id = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[42; 32]).unwrap());
4993 let config = UserConfig::default();
4994 let mut node_a_chan = Channel::<EnforcingSigner>::new_outbound(&&feeest, &&keys_provider, node_b_node_id, 10000000, 100000, 42, &config).unwrap();
4996 // Create Node B's channel by receiving Node A's open_channel message
4997 let open_channel_msg = node_a_chan.get_open_channel(chain_hash);
4998 let node_b_node_id = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[7; 32]).unwrap());
4999 let mut node_b_chan = Channel::<EnforcingSigner>::new_from_req(&&feeest, &&keys_provider, node_b_node_id, InitFeatures::known(), &open_channel_msg, 7, &config).unwrap();
5001 // Node B --> Node A: accept channel
5002 let accept_channel_msg = node_b_chan.get_accept_channel();
5003 node_a_chan.accept_channel(&accept_channel_msg, &config, InitFeatures::known()).unwrap();
5005 // Node A --> Node B: funding created
5006 let output_script = node_a_chan.get_funding_redeemscript();
5007 let tx = Transaction { version: 1, lock_time: 0, input: Vec::new(), output: vec![TxOut {
5008 value: 10000000, script_pubkey: output_script.clone(),
5010 let funding_outpoint = OutPoint{ txid: tx.txid(), index: 0 };
5011 let funding_created_msg = node_a_chan.get_outbound_funding_created(tx.clone(), funding_outpoint, &&logger).unwrap();
5012 let (funding_signed_msg, _) = node_b_chan.funding_created(&funding_created_msg, last_block_hash, &&logger).unwrap();
5014 // Node B --> Node A: funding signed
5015 let _ = node_a_chan.funding_signed(&funding_signed_msg, last_block_hash, &&logger);
5017 // Now disconnect the two nodes and check that the commitment point in
5018 // Node B's channel_reestablish message is sane.
5019 node_b_chan.remove_uncommitted_htlcs_and_mark_paused(&&logger);
5020 let msg = node_b_chan.get_channel_reestablish(&&logger);
5021 assert_eq!(msg.next_local_commitment_number, 1); // now called next_commitment_number
5022 assert_eq!(msg.next_remote_commitment_number, 0); // now called next_revocation_number
5023 match msg.data_loss_protect {
5024 OptionalField::Present(DataLossProtect { your_last_per_commitment_secret, .. }) => {
5025 assert_eq!(your_last_per_commitment_secret, [0; 32]);
5030 // Check that the commitment point in Node A's channel_reestablish message
5032 node_a_chan.remove_uncommitted_htlcs_and_mark_paused(&&logger);
5033 let msg = node_a_chan.get_channel_reestablish(&&logger);
5034 assert_eq!(msg.next_local_commitment_number, 1); // now called next_commitment_number
5035 assert_eq!(msg.next_remote_commitment_number, 0); // now called next_revocation_number
5036 match msg.data_loss_protect {
5037 OptionalField::Present(DataLossProtect { your_last_per_commitment_secret, .. }) => {
5038 assert_eq!(your_last_per_commitment_secret, [0; 32]);
5045 fn channel_update() {
5046 let feeest = TestFeeEstimator{fee_est: 15000};
5047 let secp_ctx = Secp256k1::new();
5048 let seed = [42; 32];
5049 let network = Network::Testnet;
5050 let chain_hash = genesis_block(network).header.block_hash();
5051 let keys_provider = test_utils::TestKeysInterface::new(&seed, network);
5053 // Create a channel.
5054 let node_b_node_id = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[42; 32]).unwrap());
5055 let config = UserConfig::default();
5056 let mut node_a_chan = Channel::<EnforcingSigner>::new_outbound(&&feeest, &&keys_provider, node_b_node_id, 10000000, 100000, 42, &config).unwrap();
5057 assert!(node_a_chan.counterparty_forwarding_info.is_none());
5058 assert_eq!(node_a_chan.holder_htlc_minimum_msat, 1); // the default
5059 assert!(node_a_chan.counterparty_forwarding_info().is_none());
5061 // Make sure that receiving a channel update will update the Channel as expected.
5062 let update = ChannelUpdate {
5063 contents: UnsignedChannelUpdate {
5065 short_channel_id: 0,
5068 cltv_expiry_delta: 100,
5069 htlc_minimum_msat: 5,
5070 htlc_maximum_msat: OptionalField::Absent,
5072 fee_proportional_millionths: 11,
5073 excess_data: Vec::new(),
5075 signature: Signature::from(unsafe { FFISignature::new() })
5077 node_a_chan.channel_update(&update).unwrap();
5079 // The counterparty can send an update with a higher minimum HTLC, but that shouldn't
5080 // change our official htlc_minimum_msat.
5081 assert_eq!(node_a_chan.holder_htlc_minimum_msat, 1);
5082 match node_a_chan.counterparty_forwarding_info() {
5084 assert_eq!(info.cltv_expiry_delta, 100);
5085 assert_eq!(info.fee_base_msat, 110);
5086 assert_eq!(info.fee_proportional_millionths, 11);
5088 None => panic!("expected counterparty forwarding info to be Some")
5093 fn outbound_commitment_test() {
5094 // Test vectors from BOLT 3 Appendix C:
5095 let feeest = TestFeeEstimator{fee_est: 15000};
5096 let logger : Arc<Logger> = Arc::new(test_utils::TestLogger::new());
5097 let secp_ctx = Secp256k1::new();
5099 let mut signer = InMemorySigner::new(
5101 SecretKey::from_slice(&hex::decode("30ff4956bbdd3222d44cc5e8a1261dab1e07957bdac5ae88fe3261ef321f3749").unwrap()[..]).unwrap(),
5102 SecretKey::from_slice(&hex::decode("0fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff").unwrap()[..]).unwrap(),
5103 SecretKey::from_slice(&hex::decode("1111111111111111111111111111111111111111111111111111111111111111").unwrap()[..]).unwrap(),
5104 SecretKey::from_slice(&hex::decode("3333333333333333333333333333333333333333333333333333333333333333").unwrap()[..]).unwrap(),
5105 SecretKey::from_slice(&hex::decode("1111111111111111111111111111111111111111111111111111111111111111").unwrap()[..]).unwrap(),
5107 // These aren't set in the test vectors:
5108 [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],
5113 assert_eq!(signer.pubkeys().funding_pubkey.serialize()[..],
5114 hex::decode("023da092f6980e58d2c037173180e9a465476026ee50f96695963e8efe436f54eb").unwrap()[..]);
5115 let keys_provider = Keys { signer: signer.clone() };
5117 let counterparty_node_id = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[42; 32]).unwrap());
5118 let mut config = UserConfig::default();
5119 config.channel_options.announced_channel = false;
5120 let mut chan = Channel::<InMemorySigner>::new_outbound(&&feeest, &&keys_provider, counterparty_node_id, 10_000_000, 100000, 42, &config).unwrap(); // Nothing uses their network key in this test
5121 chan.holder_dust_limit_satoshis = 546;
5123 let funding_info = OutPoint{ txid: Txid::from_hex("8984484a580b825b9972d7adb15050b3ab624ccd731946b3eeddb92f4e7ef6be").unwrap(), index: 0 };
5125 let counterparty_pubkeys = ChannelPublicKeys {
5126 funding_pubkey: public_from_secret_hex(&secp_ctx, "1552dfba4f6cf29a62a0af13c8d6981d36d0ef8d61ba10fb0fe90da7634d7e13"),
5127 revocation_basepoint: PublicKey::from_slice(&hex::decode("02466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f27").unwrap()[..]).unwrap(),
5128 payment_point: public_from_secret_hex(&secp_ctx, "4444444444444444444444444444444444444444444444444444444444444444"),
5129 delayed_payment_basepoint: public_from_secret_hex(&secp_ctx, "1552dfba4f6cf29a62a0af13c8d6981d36d0ef8d61ba10fb0fe90da7634d7e13"),
5130 htlc_basepoint: public_from_secret_hex(&secp_ctx, "4444444444444444444444444444444444444444444444444444444444444444")
5132 chan.channel_transaction_parameters.counterparty_parameters = Some(
5133 CounterpartyChannelTransactionParameters {
5134 pubkeys: counterparty_pubkeys.clone(),
5135 selected_contest_delay: 144
5137 chan.channel_transaction_parameters.funding_outpoint = Some(funding_info);
5138 signer.ready_channel(&chan.channel_transaction_parameters);
5140 assert_eq!(counterparty_pubkeys.payment_point.serialize()[..],
5141 hex::decode("032c0b7cf95324a07d05398b240174dc0c2be444d96b159aa6c7f7b1e668680991").unwrap()[..]);
5143 assert_eq!(counterparty_pubkeys.funding_pubkey.serialize()[..],
5144 hex::decode("030e9f7b623d2ccc7c9bd44d66d5ce21ce504c0acf6385a132cec6d3c39fa711c1").unwrap()[..]);
5146 assert_eq!(counterparty_pubkeys.htlc_basepoint.serialize()[..],
5147 hex::decode("032c0b7cf95324a07d05398b240174dc0c2be444d96b159aa6c7f7b1e668680991").unwrap()[..]);
5149 // We can't just use build_holder_transaction_keys here as the per_commitment_secret is not
5150 // derived from a commitment_seed, so instead we copy it here and call
5151 // build_commitment_transaction.
5152 let delayed_payment_base = &chan.holder_signer.pubkeys().delayed_payment_basepoint;
5153 let per_commitment_secret = SecretKey::from_slice(&hex::decode("1f1e1d1c1b1a191817161514131211100f0e0d0c0b0a09080706050403020100").unwrap()[..]).unwrap();
5154 let per_commitment_point = PublicKey::from_secret_key(&secp_ctx, &per_commitment_secret);
5155 let htlc_basepoint = &chan.holder_signer.pubkeys().htlc_basepoint;
5156 let keys = TxCreationKeys::derive_new(&secp_ctx, &per_commitment_point, delayed_payment_base, htlc_basepoint, &counterparty_pubkeys.revocation_basepoint, &counterparty_pubkeys.htlc_basepoint).unwrap();
5158 macro_rules! test_commitment {
5159 ( $counterparty_sig_hex: expr, $sig_hex: expr, $tx_hex: expr, {
5160 $( { $htlc_idx: expr, $counterparty_htlc_sig_hex: expr, $htlc_sig_hex: expr, $htlc_tx_hex: expr } ), *
5162 let (commitment_tx, htlcs): (_, Vec<HTLCOutputInCommitment>) = {
5163 let mut res = chan.build_commitment_transaction(0xffffffffffff - 42, &keys, true, false, chan.feerate_per_kw, &logger);
5165 let htlcs = res.2.drain(..)
5166 .filter_map(|(htlc, _)| if htlc.transaction_output_index.is_some() { Some(htlc) } else { None })
5170 let trusted_tx = commitment_tx.trust();
5171 let unsigned_tx = trusted_tx.built_transaction();
5172 let redeemscript = chan.get_funding_redeemscript();
5173 let counterparty_signature = Signature::from_der(&hex::decode($counterparty_sig_hex).unwrap()[..]).unwrap();
5174 let sighash = unsigned_tx.get_sighash_all(&redeemscript, chan.channel_value_satoshis);
5175 secp_ctx.verify(&sighash, &counterparty_signature, chan.counterparty_funding_pubkey()).unwrap();
5177 let mut per_htlc: Vec<(HTLCOutputInCommitment, Option<Signature>)> = Vec::new();
5178 per_htlc.clear(); // Don't warn about excess mut for no-HTLC calls
5179 let mut counterparty_htlc_sigs = Vec::new();
5180 counterparty_htlc_sigs.clear(); // Don't warn about excess mut for no-HTLC calls
5182 let remote_signature = Signature::from_der(&hex::decode($counterparty_htlc_sig_hex).unwrap()[..]).unwrap();
5183 per_htlc.push((htlcs[$htlc_idx].clone(), Some(remote_signature)));
5184 counterparty_htlc_sigs.push(remote_signature);
5186 assert_eq!(htlcs.len(), per_htlc.len());
5188 let holder_commitment_tx = HolderCommitmentTransaction::new(
5189 commitment_tx.clone(),
5190 counterparty_signature,
5191 counterparty_htlc_sigs,
5192 &chan.holder_signer.pubkeys().funding_pubkey,
5193 chan.counterparty_funding_pubkey()
5195 let (holder_sig, htlc_sigs) = signer.sign_holder_commitment_and_htlcs(&holder_commitment_tx, &secp_ctx).unwrap();
5196 assert_eq!(Signature::from_der(&hex::decode($sig_hex).unwrap()[..]).unwrap(), holder_sig, "holder_sig");
5198 let funding_redeemscript = chan.get_funding_redeemscript();
5199 let tx = holder_commitment_tx.add_holder_sig(&funding_redeemscript, holder_sig);
5200 assert_eq!(serialize(&tx)[..], hex::decode($tx_hex).unwrap()[..], "tx");
5202 // ((htlc, counterparty_sig), (index, holder_sig))
5203 let mut htlc_sig_iter = holder_commitment_tx.htlcs().iter().zip(&holder_commitment_tx.counterparty_htlc_sigs).zip(htlc_sigs.iter().enumerate());
5206 let remote_signature = Signature::from_der(&hex::decode($counterparty_htlc_sig_hex).unwrap()[..]).unwrap();
5208 let ref htlc = htlcs[$htlc_idx];
5209 let htlc_tx = chan.build_htlc_transaction(&unsigned_tx.txid, &htlc, true, &keys, chan.feerate_per_kw);
5210 let htlc_redeemscript = chan_utils::get_htlc_redeemscript(&htlc, &keys);
5211 let htlc_sighash = Message::from_slice(&bip143::SigHashCache::new(&htlc_tx).signature_hash(0, &htlc_redeemscript, htlc.amount_msat / 1000, SigHashType::All)[..]).unwrap();
5212 secp_ctx.verify(&htlc_sighash, &remote_signature, &keys.countersignatory_htlc_key).unwrap();
5214 let mut preimage: Option<PaymentPreimage> = None;
5217 let out = PaymentHash(Sha256::hash(&[i; 32]).into_inner());
5218 if out == htlc.payment_hash {
5219 preimage = Some(PaymentPreimage([i; 32]));
5223 assert!(preimage.is_some());
5226 let htlc_sig = htlc_sig_iter.next().unwrap();
5227 assert_eq!((htlc_sig.0).0.transaction_output_index, Some($htlc_idx), "output index");
5229 let signature = Signature::from_der(&hex::decode($htlc_sig_hex).unwrap()[..]).unwrap();
5230 assert_eq!(signature, *(htlc_sig.1).1, "htlc sig");
5231 let index = (htlc_sig.1).0;
5232 let channel_parameters = chan.channel_transaction_parameters.as_holder_broadcastable();
5233 let trusted_tx = holder_commitment_tx.trust();
5234 assert_eq!(serialize(&trusted_tx.get_signed_htlc_tx(&channel_parameters, index, &(htlc_sig.0).1, (htlc_sig.1).1, &preimage))[..],
5235 hex::decode($htlc_tx_hex).unwrap()[..], "htlc tx");
5237 assert!(htlc_sig_iter.next().is_none());
5241 // simple commitment tx with no HTLCs
5242 chan.value_to_self_msat = 7000000000;
5244 test_commitment!("3045022100c3127b33dcc741dd6b05b1e63cbd1a9a7d816f37af9b6756fa2376b056f032370220408b96279808fe57eb7e463710804cdf4f108388bc5cf722d8c848d2c7f9f3b0",
5245 "30440220616210b2cc4d3afb601013c373bbd8aac54febd9f15400379a8cb65ce7deca60022034236c010991beb7ff770510561ae8dc885b8d38d1947248c38f2ae055647142",
5246 "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", {});
5248 chan.pending_inbound_htlcs.push({
5249 let mut out = InboundHTLCOutput{
5251 amount_msat: 1000000,
5253 payment_hash: PaymentHash([0; 32]),
5254 state: InboundHTLCState::Committed,
5256 out.payment_hash.0 = Sha256::hash(&hex::decode("0000000000000000000000000000000000000000000000000000000000000000").unwrap()).into_inner();
5259 chan.pending_inbound_htlcs.push({
5260 let mut out = InboundHTLCOutput{
5262 amount_msat: 2000000,
5264 payment_hash: PaymentHash([0; 32]),
5265 state: InboundHTLCState::Committed,
5267 out.payment_hash.0 = Sha256::hash(&hex::decode("0101010101010101010101010101010101010101010101010101010101010101").unwrap()).into_inner();
5270 chan.pending_outbound_htlcs.push({
5271 let mut out = OutboundHTLCOutput{
5273 amount_msat: 2000000,
5275 payment_hash: PaymentHash([0; 32]),
5276 state: OutboundHTLCState::Committed,
5277 source: HTLCSource::dummy(),
5279 out.payment_hash.0 = Sha256::hash(&hex::decode("0202020202020202020202020202020202020202020202020202020202020202").unwrap()).into_inner();
5282 chan.pending_outbound_htlcs.push({
5283 let mut out = OutboundHTLCOutput{
5285 amount_msat: 3000000,
5287 payment_hash: PaymentHash([0; 32]),
5288 state: OutboundHTLCState::Committed,
5289 source: HTLCSource::dummy(),
5291 out.payment_hash.0 = Sha256::hash(&hex::decode("0303030303030303030303030303030303030303030303030303030303030303").unwrap()).into_inner();
5294 chan.pending_inbound_htlcs.push({
5295 let mut out = InboundHTLCOutput{
5297 amount_msat: 4000000,
5299 payment_hash: PaymentHash([0; 32]),
5300 state: InboundHTLCState::Committed,
5302 out.payment_hash.0 = Sha256::hash(&hex::decode("0404040404040404040404040404040404040404040404040404040404040404").unwrap()).into_inner();
5306 // commitment tx with all five HTLCs untrimmed (minimum feerate)
5307 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
5308 chan.feerate_per_kw = 0;
5310 test_commitment!("3044022009b048187705a8cbc9ad73adbe5af148c3d012e1f067961486c822c7af08158c022006d66f3704cfab3eb2dc49dae24e4aa22a6910fc9b424007583204e3621af2e5",
5311 "304402206fc2d1f10ea59951eefac0b4b7c396a3c3d87b71ff0b019796ef4535beaf36f902201765b0181e514d04f4c8ad75659d7037be26cdb3f8bb6f78fe61decef484c3ea",
5312 "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", {
5315 "3045022100d9e29616b8f3959f1d3d7f7ce893ffedcdc407717d0de8e37d808c91d3a7c50d022078c3033f6d00095c8720a4bc943c1b45727818c082e4e3ddbc6d3116435b624b",
5316 "30440220636de5682ef0c5b61f124ec74e8aa2461a69777521d6998295dcea36bc3338110220165285594b23c50b28b82df200234566628a27bcd17f7f14404bd865354eb3ce",
5317 "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" },
5320 "30440220649fe8b20e67e46cbb0d09b4acea87dbec001b39b08dee7bdd0b1f03922a8640022037c462dff79df501cecfdb12ea7f4de91f99230bb544726f6e04527b1f896004",
5321 "3045022100803159dee7935dba4a1d36a61055ce8fd62caa528573cc221ae288515405a252022029c59e7cffce374fe860100a4a63787e105c3cf5156d40b12dd53ff55ac8cf3f",
5322 "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" },
5325 "30440220770fc321e97a19f38985f2e7732dd9fe08d16a2efa4bcbc0429400a447faf49102204d40b417f3113e1b0944ae0986f517564ab4acd3d190503faf97a6e420d43352",
5326 "3045022100a437cc2ce77400ecde441b3398fea3c3ad8bdad8132be818227fe3c5b8345989022069d45e7fa0ae551ec37240845e2c561ceb2567eacf3076a6a43a502d05865faa",
5327 "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" },
5330 "304402207bcbf4f60a9829b05d2dbab84ed593e0291836be715dc7db6b72a64caf646af802201e489a5a84f7c5cc130398b841d138d031a5137ac8f4c49c770a4959dc3c1363",
5331 "304402203121d9b9c055f354304b016a36662ee99e1110d9501cb271b087ddb6f382c2c80220549882f3f3b78d9c492de47543cb9a697cecc493174726146536c5954dac7487",
5332 "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" },
5335 "3044022076dca5cb81ba7e466e349b7128cdba216d4d01659e29b96025b9524aaf0d1899022060de85697b88b21c749702b7d2cfa7dfeaa1f472c8f1d7d9c23f2bf968464b87",
5336 "3045022100d9080f103cc92bac15ec42464a95f070c7fb6925014e673ee2ea1374d36a7f7502200c65294d22eb20d48564954d5afe04a385551919d8b2ddb4ae2459daaeee1d95",
5337 "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" }
5340 // commitment tx with seven outputs untrimmed (maximum feerate)
5341 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
5342 chan.feerate_per_kw = 647;
5344 test_commitment!("3045022100a135f9e8a5ed25f7277446c67956b00ce6f610ead2bdec2c2f686155b7814772022059f1f6e1a8b336a68efcc1af3fe4d422d4827332b5b067501b099c47b7b5b5ee",
5345 "30450221009ec15c687898bb4da8b3a833e5ab8bfc51ec6e9202aaa8e66611edfd4a85ed1102203d7183e45078b9735c93450bc3415d3e5a8c576141a711ec6ddcb4a893926bb7",
5346 "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", {
5349 "30450221008437627f9ad84ac67052e2a414a4367b8556fd1f94d8b02590f89f50525cd33502205b9c21ff6e7fc864f2352746ad8ba59182510819acb644e25b8a12fc37bbf24f",
5350 "30440220344b0deb055230d01703e6c7acd45853c4af2328b49b5d8af4f88a060733406602202ea64f2a43d5751edfe75503cbc35a62e3141b5ed032fa03360faf4ca66f670b",
5351 "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" },
5354 "304402205a67f92bf6845cf2892b48d874ac1daf88a36495cf8a06f93d83180d930a6f75022031da1621d95c3f335cc06a3056cf960199dae600b7cf89088f65fc53cdbef28c",
5355 "30450221009e5e3822b0185c6799a95288c597b671d6cc69ab80f43740f00c6c3d0752bdda02206da947a74bd98f3175324dc56fdba86cc783703a120a6f0297537e60632f4c7f",
5356 "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" },
5359 "30440220437e21766054a3eef7f65690c5bcfa9920babbc5af92b819f772f6ea96df6c7402207173622024bd97328cfb26c6665e25c2f5d67c319443ccdc60c903217005d8c8",
5360 "3045022100fcfc47e36b712624677626cef3dc1d67f6583bd46926a6398fe6b00b0c9a37760220525788257b187fc775c6370d04eadf34d06f3650a63f8df851cee0ecb47a1673",
5361 "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" },
5364 "304402207436e10737e4df499fc051686d3e11a5bb2310e4d1f1e691d287cef66514791202207cb58e71a6b7a42dd001b7e3ae672ea4f71ea3e1cd412b742e9124abb0739c64",
5365 "3045022100e78211b8409afb7255ffe37337da87f38646f1faebbdd61bc1920d69e3ead67a02201a626305adfcd16bfb7e9340928d9b6305464eab4aa4c4a3af6646e9b9f69dee",
5366 "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" },
5369 "30450221009acd6a827a76bfee50806178dfe0495cd4e1d9c58279c194c7b01520fe68cb8d022024d439047c368883e570997a7d40f0b430cb5a742f507965e7d3063ae3feccca",
5370 "3044022048762cf546bbfe474f1536365ea7c416e3c0389d60558bc9412cb148fb6ab68202207215d7083b75c96ff9d2b08c59c34e287b66820f530b486a9aa4cdd9c347d5b9",
5371 "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" }
5374 // commitment tx with six outputs untrimmed (minimum feerate)
5375 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
5376 chan.feerate_per_kw = 648;
5378 test_commitment!("304402203948f900a5506b8de36a4d8502f94f21dd84fd9c2314ab427d52feaa7a0a19f2022059b6a37a4adaa2c5419dc8aea63c6e2a2ec4c4bde46207f6dc1fcd22152fc6e5",
5379 "3045022100b15f72908ba3382a34ca5b32519240a22300cc6015b6f9418635fb41f3d01d8802207adb331b9ed1575383dca0f2355e86c173802feecf8298fbea53b9d4610583e9",
5380 "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", {
5383 "3045022100a031202f3be94678f0e998622ee95ebb6ada8da1e9a5110228b5e04a747351e4022010ca6a21e18314ed53cfaae3b1f51998552a61a468e596368829a50ce40110e0",
5384 "304502210097e1873b57267730154595187a34949d3744f52933070c74757005e61ce2112e02204ecfba2aa42d4f14bdf8bad4206bb97217b702e6c433e0e1b0ce6587e6d46ec6",
5385 "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" },
5388 "304402202361012a634aee7835c5ecdd6413dcffa8f404b7e77364c792cff984e4ee71e90220715c5e90baa08daa45a7439b1ee4fa4843ed77b19c058240b69406606d384124",
5389 "3044022019de73b00f1d818fb388e83b2c8c31f6bce35ac624e215bc12f88f9dc33edf48022006ff814bb9f700ee6abc3294e146fac3efd4f13f0005236b41c0a946ee00c9ae",
5390 "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" },
5393 "304402207e8e82cd71ed4febeb593732c260456836e97d81896153ecd2b3cf320ca6861702202dd4a30f68f98ced7cc56a36369ac1fdd978248c5ff4ed204fc00cc625532989",
5394 "3045022100bd0be6100c4fd8f102ec220e1b053e4c4e2ecca25615490150007b40d314dc3902201a1e0ea266965b43164d9e6576f58fa6726d42883dd1c3996d2925c2e2260796",
5395 "020000000001010f44041fdfba175987cf4e6135ba2a154e3b7fb96483dc0ed5efc0678e5b6bf1020000000000000000010b0a0000000000002200204adb4e2f00643db396dd120d4e7dc17625f5f2c11a40d857accc862d6b7dd80e050047304402207e8e82cd71ed4febeb593732c260456836e97d81896153ecd2b3cf320ca6861702202dd4a30f68f98ced7cc56a36369ac1fdd978248c5ff4ed204fc00cc62553298901483045022100bd0be6100c4fd8f102ec220e1b053e4c4e2ecca25615490150007b40d314dc3902201a1e0ea266965b43164d9e6576f58fa6726d42883dd1c3996d2925c2e226079601008576a91414011f7254d96b819c76986c277d115efce6f7b58763ac67210394854aa6eab5b2a8122cc726e9dded053a2184d88256816826d6231c068d4a5b7c820120876475527c21030d417a46946384f88d5f3337267c5e579765875dc4daca813e21734b140639e752ae67a9148a486ff2e31d6158bf39e2608864d63fefd09d5b88ac6868f7010000" },
5398 "3044022024cd52e4198c8ae0e414a86d86b5a65ea7450f2eb4e783096736d93395eca5ce022078f0094745b45be4d4b2b04dd5978c9e66ba49109e5704403e84aaf5f387d6be",
5399 "3045022100bbfb9d0a946d420807c86e985d636cceb16e71c3694ed186316251a00cbd807202207773223f9a337e145f64673825be9b30d07ef1542c82188b264bedcf7cda78c6",
5400 "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" }
5403 // commitment tx with six outputs untrimmed (maximum feerate)
5404 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
5405 chan.feerate_per_kw = 2069;
5407 test_commitment!("304502210090b96a2498ce0c0f2fadbec2aab278fed54c1a7838df793ec4d2c78d96ec096202204fdd439c50f90d483baa7b68feeef4bd33bc277695405447bcd0bfb2ca34d7bc",
5408 "3045022100ad9a9bbbb75d506ca3b716b336ee3cf975dd7834fcf129d7dd188146eb58a8b4022061a759ee417339f7fe2ea1e8deb83abb6a74db31a09b7648a932a639cda23e33",
5409 "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", {
5412 "3045022100f33513ee38abf1c582876f921f8fddc06acff48e04515532a32d3938de938ffd02203aa308a2c1863b7d6fdf53159a1465bf2e115c13152546cc5d74483ceaa7f699",
5413 "3045022100a637902a5d4c9ba9e7c472a225337d5aac9e2e3f6744f76e237132e7619ba0400220035c60d784a031c0d9f6df66b7eab8726a5c25397399ee4aa960842059eb3f9d",
5414 "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" },
5417 "3045022100ce07682cf4b90093c22dc2d9ab2a77ad6803526b655ef857221cc96af5c9e0bf02200f501cee22e7a268af40b555d15a8237c9f36ad67ef1841daf9f6a0267b1e6df",
5418 "3045022100e57e46234f8782d3ff7aa593b4f7446fb5316c842e693dc63ee324fd49f6a1c302204a2f7b44c48bd26e1554422afae13153eb94b29d3687b733d18930615fb2db61",
5419 "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" },
5422 "3045022100e3e35492e55f82ec0bc2f317ffd7a486d1f7024330fe9743c3559fc39f32ef0c02203d1d4db651fc388a91d5ad8ecdd8e83673063bc8eefe27cfd8c189090e3a23e0",
5423 "3044022068613fb1b98eb3aec7f44c5b115b12343c2f066c4277c82b5f873dfe68f37f50022028109b4650f3f528ca4bfe9a467aff2e3e43893b61b5159157119d5d95cf1c18",
5424 "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" },
5427 "304402207475aeb0212ef9bf5130b60937817ad88c9a87976988ef1f323f026148cc4a850220739fea17ad3257dcad72e509c73eebe86bee30b178467b9fdab213d631b109df",
5428 "3045022100d315522e09e7d53d2a659a79cb67fef56d6c4bddf3f46df6772d0d20a7beb7c8022070bcc17e288607b6a72be0bd83368bb6d53488db266c1cdb4d72214e4f02ac33",
5429 "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" }
5432 // commitment tx with five outputs untrimmed (minimum feerate)
5433 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
5434 chan.feerate_per_kw = 2070;
5436 test_commitment!("304402204ca1ba260dee913d318271d86e10ca0f5883026fb5653155cff600fb40895223022037b145204b7054a40e08bb1fefbd826f827b40838d3e501423bcc57924bcb50c",
5437 "3044022001014419b5ba00e083ac4e0a85f19afc848aacac2d483b4b525d15e2ae5adbfe022015ebddad6ee1e72b47cb09f3e78459da5be01ccccd95dceca0e056a00cc773c1",
5438 "02000000000101bef67e4e2fb9ddeeb3461973cd4c62abb35050b1add772995b820b584a488489000000000038b02b8005d007000000000000220020403d394747cae42e98ff01734ad5c08f82ba123d3d9a620abda88989651e2ab5b80b000000000000220020c20b5d1f8584fd90443e7b7b720136174fa4b9333c261d04dbbd012635c0f419a00f0000000000002200208c48d15160397c9731df9bc3b236656efb6665fbfe92b4a6878e88a499f741c4c0c62d0000000000160014cc1b07838e387deacd0e5232e1e8b49f4c29e484da966a00000000002200204adb4e2f00643db396dd120d4e7dc17625f5f2c11a40d857accc862d6b7dd80e0400473044022001014419b5ba00e083ac4e0a85f19afc848aacac2d483b4b525d15e2ae5adbfe022015ebddad6ee1e72b47cb09f3e78459da5be01ccccd95dceca0e056a00cc773c10147304402204ca1ba260dee913d318271d86e10ca0f5883026fb5653155cff600fb40895223022037b145204b7054a40e08bb1fefbd826f827b40838d3e501423bcc57924bcb50c01475221023da092f6980e58d2c037173180e9a465476026ee50f96695963e8efe436f54eb21030e9f7b623d2ccc7c9bd44d66d5ce21ce504c0acf6385a132cec6d3c39fa711c152ae3e195220", {
5441 "304402205f6b6d12d8d2529fb24f4445630566cf4abbd0f9330ab6c2bdb94222d6a2a0c502202f556258ae6f05b193749e4c541dfcc13b525a5422f6291f073f15617ba8579b",
5442 "30440220150b11069454da70caf2492ded9e0065c9a57f25ac2a4c52657b1d15b6c6ed85022068a38833b603c8892717206383611bad210f1cbb4b1f87ea29c6c65b9e1cb3e5",
5443 "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" },
5446 "3045022100f960dfb1c9aee7ce1437efa65b523e399383e8149790e05d8fed27ff6e42fe0002202fe8613e062ffe0b0c518cc4101fba1c6de70f64a5bcc7ae663f2efae43b8546",
5447 "30450221009a6ed18e6873bc3644332a6ee21c152a5b102821865350df7a8c74451a51f9f2022050d801fb4895d7d7fbf452824c0168347f5c0cbe821cf6a97a63af5b8b2563c6",
5448 "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" },
5451 "3045022100ae5fc7717ae684bc1fcf9020854e5dbe9842c9e7472879ac06ff95ac2bb10e4e022057728ada4c00083a3e65493fb5d50a232165948a1a0f530ef63185c2c8c56504",
5452 "30440220408ad3009827a8fccf774cb285587686bfb2ed041f89a89453c311ce9c8ee0f902203c7392d9f8306d3a46522a66bd2723a7eb2628cb2d9b34d4c104f1766bf37502",
5453 "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" }
5456 // commitment tx with five outputs untrimmed (maximum feerate)
5457 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
5458 chan.feerate_per_kw = 2194;
5460 test_commitment!("304402204bb3d6e279d71d9da414c82de42f1f954267c762b2e2eb8b76bc3be4ea07d4b0022014febc009c5edc8c3fc5d94015de163200f780046f1c293bfed8568f08b70fb3",
5461 "3044022072c2e2b1c899b2242656a537dde2892fa3801be0d6df0a87836c550137acde8302201654aa1974d37a829083c3ba15088689f30b56d6a4f6cb14c7bad0ee3116d398",
5462 "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", {
5465 "3045022100939726680351a7856c1bc386d4a1f422c7d29bd7b56afc139570f508474e6c40022023175a799ccf44c017fbaadb924c40b2a12115a5b7d0dfd3228df803a2de8450",
5466 "304502210099c98c2edeeee6ec0fb5f3bea8b79bb016a2717afa9b5072370f34382de281d302206f5e2980a995e045cf90a547f0752a7ee99d48547bc135258fe7bc07e0154301",
5467 "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" },
5470 "3044022021bb883bf324553d085ba2e821cad80c28ef8b303dbead8f98e548783c02d1600220638f9ef2a9bba25869afc923f4b5dc38be3bb459f9efa5d869392d5f7779a4a0",
5471 "3045022100fd85bd7697b89c08ec12acc8ba89b23090637d83abd26ca37e01ae93e67c367302202b551fe69386116c47f984aab9c8dfd25d864dcde5d3389cfbef2447a85c4b77",
5472 "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" },
5475 "3045022100c9e6f0454aa598b905a35e641a70cc9f67b5f38cc4b00843a041238c4a9f1c4a0220260a2822a62da97e44583e837245995ca2e36781769c52f19e498efbdcca262b",
5476 "30450221008a9f2ea24cd455c2b64c1472a5fa83865b0a5f49a62b661801e884cf2849af8302204d44180e50bf6adfcf1c1e581d75af91aba4e28681ce4a5ee5f3cbf65eca10f3",
5477 "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" }
5480 // commitment tx with four outputs untrimmed (minimum feerate)
5481 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
5482 chan.feerate_per_kw = 2195;
5484 test_commitment!("304402201a8c1b1f9671cd9e46c7323a104d7047cc48d3ee80d40d4512e0c72b8dc65666022066d7f9a2ce18c9eb22d2739ffcce05721c767f9b607622a31b6ea5793ddce403",
5485 "3044022044d592025b610c0d678f65032e87035cdfe89d1598c522cc32524ae8172417c30220749fef9d5b2ae8cdd91ece442ba8809bc891efedae2291e578475f97715d1767",
5486 "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", {
5489 "3045022100e57b845066a06ee7c2cbfc29eabffe52daa9bf6f6de760066d04df9f9b250e0002202ffb197f0e6e0a77a75a9aff27014bd3de83b7f748d7efef986abe655e1dd50e",
5490 "3045022100ecc8c6529d0b2316d046f0f0757c1e1c25a636db168ec4f3aa1b9278df685dc0022067ae6b65e936f1337091f7b18a15935b608c5f2cdddb2f892ed0babfdd376d76",
5491 "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" },
5494 "3045022100d193b7ecccad8057571620a0b1ffa6c48e9483311723b59cf536043b20bc51550220546d4bd37b3b101ecda14f6c907af46ec391abce1cd9c7ce22b1a62b534f2f2a",
5495 "3044022014d66f11f9cacf923807eba49542076c5fe5cccf252fb08fe98c78ef3ca6ab5402201b290dbe043cc512d9d78de074a5a129b8759bc6a6c546b190d120b690bd6e82",
5496 "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" }
5499 // commitment tx with four outputs untrimmed (maximum feerate)
5500 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
5501 chan.feerate_per_kw = 3702;
5503 test_commitment!("304502210092a587aeb777f869e7ff0d7898ea619ee26a3dacd1f3672b945eea600be431100220077ee9eae3528d15251f2a52b607b189820e57a6ccfac8d1af502b132ee40169",
5504 "3045022100e5efb73c32d32da2d79702299b6317de6fb24a60476e3855926d78484dd1b3c802203557cb66a42c944ef06e00bcc4da35a5bcb2f185aab0f8e403e519e1d66aaf75",
5505 "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", {
5508 "304402206fa54c11f98c3bae1e93df43fc7affeb05b476bf8060c03e29c377c69bc08e8b0220672701cce50d5c379ff45a5d2cfe48ac44973adb066ac32608e21221d869bb89",
5509 "304402206e36c683ebf2cb16bcef3d5439cf8b53cd97280a365ed8acd7abb85a8ba5f21c02206e8621edfc2a5766cbc96eb67fd501127ff163eb6b85518a39f7d4974aef126f",
5510 "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" },
5513 "3044022057649739b0eb74d541ead0dfdb3d4b2c15aa192720031044c3434c67812e5ca902201e5ede42d960ae551707f4a6b34b09393cf4dee2418507daa022e3550dbb5817",
5514 "304402207faad26678c8850e01b4a0696d60841f7305e1832b786110ee9075cb92ed14a30220516ef8ee5dfa80824ea28cbcec0dd95f8b847146257c16960db98507db15ffdc",
5515 "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" }
5518 // commitment tx with three outputs untrimmed (minimum feerate)
5519 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
5520 chan.feerate_per_kw = 3703;
5522 test_commitment!("3045022100b495d239772a237ff2cf354b1b11be152fd852704cb184e7356d13f2fb1e5e430220723db5cdb9cbd6ead7bfd3deb419cf41053a932418cbb22a67b581f40bc1f13e",
5523 "304402201b736d1773a124c745586217a75bed5f66c05716fbe8c7db4fdb3c3069741cdd02205083f39c321c1bcadfc8d97e3c791a66273d936abac0c6a2fde2ed46019508e1",
5524 "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", {
5527 "3045022100c34c61735f93f2e324cc873c3b248111ccf8f6db15d5969583757010d4ad2b4602207867bb919b2ddd6387873e425345c9b7fd18d1d66aba41f3607bc2896ef3c30a",
5528 "3045022100988c143e2110067117d2321bdd4bd16ca1734c98b29290d129384af0962b634e02206c1b02478878c5f547018b833986578f90c3e9be669fe5788ad0072a55acbb05",
5529 "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" }
5532 // commitment tx with three outputs untrimmed (maximum feerate)
5533 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
5534 chan.feerate_per_kw = 4914;
5536 test_commitment!("3045022100b4b16d5f8cc9fc4c1aff48831e832a0d8990e133978a66e302c133550954a44d022073573ce127e2200d316f6b612803a5c0c97b8d20e1e44dbe2ac0dd2fb8c95244",
5537 "3045022100d72638bc6308b88bb6d45861aae83e5b9ff6e10986546e13bce769c70036e2620220320be7c6d66d22f30b9fcd52af66531505b1310ca3b848c19285b38d8a1a8c19",
5538 "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", {
5541 "3045022100f43591c156038ba217756006bb3c55f7d113a325cdd7d9303c82115372858d68022016355b5aadf222bc8d12e426c75f4a03423917b2443a103eb2a498a3a2234374",
5542 "30440220585dee80fafa264beac535c3c0bb5838ac348b156fdc982f86adc08dfc9bfd250220130abb82f9f295cc9ef423dcfef772fde2acd85d9df48cc538981d26a10a9c10",
5543 "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" }
5546 // commitment tx with two outputs untrimmed (minimum feerate)
5547 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
5548 chan.feerate_per_kw = 4915;
5550 test_commitment!("304402203a286936e74870ca1459c700c71202af0381910a6bfab687ef494ef1bc3e02c902202506c362d0e3bee15e802aa729bf378e051644648253513f1c085b264cc2a720",
5551 "30450221008a953551f4d67cb4df3037207fc082ddaf6be84d417b0bd14c80aab66f1b01a402207508796dc75034b2dee876fe01dc05a08b019f3e5d689ac8842ade2f1befccf5",
5552 "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", {});
5554 // commitment tx with two outputs untrimmed (maximum feerate)
5555 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
5556 chan.feerate_per_kw = 9651180;
5558 test_commitment!("304402200a8544eba1d216f5c5e530597665fa9bec56943c0f66d98fc3d028df52d84f7002201e45fa5c6bc3a506cc2553e7d1c0043a9811313fc39c954692c0d47cfce2bbd3",
5559 "3045022100e11b638c05c650c2f63a421d36ef8756c5ce82f2184278643520311cdf50aa200220259565fb9c8e4a87ccaf17f27a3b9ca4f20625754a0920d9c6c239d8156a11de",
5560 "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", {});
5562 // commitment tx with one output untrimmed (minimum feerate)
5563 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
5564 chan.feerate_per_kw = 9651181;
5566 test_commitment!("304402202ade0142008309eb376736575ad58d03e5b115499709c6db0b46e36ff394b492022037b63d78d66404d6504d4c4ac13be346f3d1802928a6d3ad95a6a944227161a2",
5567 "304402207e8d51e0c570a5868a78414f4e0cbfaed1106b171b9581542c30718ee4eb95ba02203af84194c97adf98898c9afe2f2ed4a7f8dba05a2dfab28ac9d9c604aa49a379",
5568 "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", {});
5570 // commitment tx with fee greater than funder amount
5571 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
5572 chan.feerate_per_kw = 9651936;
5574 test_commitment!("304402202ade0142008309eb376736575ad58d03e5b115499709c6db0b46e36ff394b492022037b63d78d66404d6504d4c4ac13be346f3d1802928a6d3ad95a6a944227161a2",
5575 "304402207e8d51e0c570a5868a78414f4e0cbfaed1106b171b9581542c30718ee4eb95ba02203af84194c97adf98898c9afe2f2ed4a7f8dba05a2dfab28ac9d9c604aa49a379",
5576 "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", {});
5578 // commitment tx with 3 htlc outputs, 2 offered having the same amount and preimage
5579 chan.value_to_self_msat = 7_000_000_000 - 2_000_000;
5580 chan.feerate_per_kw = 253;
5581 chan.pending_inbound_htlcs.clear();
5582 chan.pending_inbound_htlcs.push({
5583 let mut out = InboundHTLCOutput{
5585 amount_msat: 2000000,
5587 payment_hash: PaymentHash([0; 32]),
5588 state: InboundHTLCState::Committed,
5590 out.payment_hash.0 = Sha256::hash(&hex::decode("0101010101010101010101010101010101010101010101010101010101010101").unwrap()).into_inner();
5593 chan.pending_outbound_htlcs.clear();
5594 chan.pending_outbound_htlcs.push({
5595 let mut out = OutboundHTLCOutput{
5597 amount_msat: 5000000,
5599 payment_hash: PaymentHash([0; 32]),
5600 state: OutboundHTLCState::Committed,
5601 source: HTLCSource::dummy(),
5603 out.payment_hash.0 = Sha256::hash(&hex::decode("0505050505050505050505050505050505050505050505050505050505050505").unwrap()).into_inner();
5606 chan.pending_outbound_htlcs.push({
5607 let mut out = OutboundHTLCOutput{
5609 amount_msat: 5000000,
5611 payment_hash: PaymentHash([0; 32]),
5612 state: OutboundHTLCState::Committed,
5613 source: HTLCSource::dummy(),
5615 out.payment_hash.0 = Sha256::hash(&hex::decode("0505050505050505050505050505050505050505050505050505050505050505").unwrap()).into_inner();
5619 test_commitment!("30440220048705bec5288d28b3f29344b8d124853b1af423a568664d2c6f02c8ea886525022060f998a461052a2476b912db426ea2a06700953a241135c7957f2e79bc222df9",
5620 "3045022100c4f1d60b6fca9febc8b39de1a31e84c5f7c4b41c97239ef05f4350aa484c6b5e02200c5134ac8b20eb7a29d0dd4a501f6aa8fefb8489171f4cb408bd2a32324ab03f",
5621 "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", {
5624 "304502210081cbb94121761d34c189cd4e6a281feea6f585060ad0ba2632e8d6b3c6bb8a6c02201007981bbd16539d63df2805b5568f1f5688cd2a885d04706f50db9b77ba13c6",
5625 "304502210090ed76aeb21b53236a598968abc66e2024691d07b62f53ddbeca8f93144af9c602205f873af5a0c10e62690e9aba09740550f194a9dc455ba4c1c23f6cde7704674c",
5626 "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" },
5628 "304402201d0f09d2bf7bc245a4f17980e1e9164290df16c70c6a2ff1592f5030d6108581022061e744a7dc151b36bf0aff7a4f1812ba90b8b03633bb979a270d19858fd960c5",
5629 "30450221009aef000d2e843a4202c1b1a2bf554abc9a7902bf49b2cb0759bc507456b7ebad02204e7c3d193ede2fd2b4cd6b39f51a920e581e35575e357e44d7b699c40ce61d39",
5630 "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" },
5632 "30440220010bf035d5823596e50dce2076a4d9f942d8d28031c9c428b901a02b6b8140de02203250e8e4a08bc5b4ecdca4d0eedf98223e02e3ac1c0206b3a7ffdb374aa21e5f",
5633 "30440220073de0067b88e425b3018b30366bfeda0ccb703118ccd3d02ead08c0f53511d002203fac50ac0e4cf8a3af0b4b1b12e801650591f748f8ddf1e089c160f10b69e511",
5634 "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" }
5639 fn test_per_commitment_secret_gen() {
5640 // Test vectors from BOLT 3 Appendix D:
5642 let mut seed = [0; 32];
5643 seed[0..32].clone_from_slice(&hex::decode("0000000000000000000000000000000000000000000000000000000000000000").unwrap());
5644 assert_eq!(chan_utils::build_commitment_secret(&seed, 281474976710655),
5645 hex::decode("02a40c85b6f28da08dfdbe0926c53fab2de6d28c10301f8f7c4073d5e42e3148").unwrap()[..]);
5647 seed[0..32].clone_from_slice(&hex::decode("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF").unwrap());
5648 assert_eq!(chan_utils::build_commitment_secret(&seed, 281474976710655),
5649 hex::decode("7cc854b54e3e0dcdb010d7a3fee464a9687be6e8db3be6854c475621e007a5dc").unwrap()[..]);
5651 assert_eq!(chan_utils::build_commitment_secret(&seed, 0xaaaaaaaaaaa),
5652 hex::decode("56f4008fb007ca9acf0e15b054d5c9fd12ee06cea347914ddbaed70d1c13a528").unwrap()[..]);
5654 assert_eq!(chan_utils::build_commitment_secret(&seed, 0x555555555555),
5655 hex::decode("9015daaeb06dba4ccc05b91b2f73bd54405f2be9f217fbacd3c5ac2e62327d31").unwrap()[..]);
5657 seed[0..32].clone_from_slice(&hex::decode("0101010101010101010101010101010101010101010101010101010101010101").unwrap());
5658 assert_eq!(chan_utils::build_commitment_secret(&seed, 1),
5659 hex::decode("915c75942a26bb3a433a8ce2cb0427c29ec6c1775cfc78328b57f6ba7bfeaa9c").unwrap()[..]);
5663 fn test_key_derivation() {
5664 // Test vectors from BOLT 3 Appendix E:
5665 let secp_ctx = Secp256k1::new();
5667 let base_secret = SecretKey::from_slice(&hex::decode("000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f").unwrap()[..]).unwrap();
5668 let per_commitment_secret = SecretKey::from_slice(&hex::decode("1f1e1d1c1b1a191817161514131211100f0e0d0c0b0a09080706050403020100").unwrap()[..]).unwrap();
5670 let base_point = PublicKey::from_secret_key(&secp_ctx, &base_secret);
5671 assert_eq!(base_point.serialize()[..], hex::decode("036d6caac248af96f6afa7f904f550253a0f3ef3f5aa2fe6838a95b216691468e2").unwrap()[..]);
5673 let per_commitment_point = PublicKey::from_secret_key(&secp_ctx, &per_commitment_secret);
5674 assert_eq!(per_commitment_point.serialize()[..], hex::decode("025f7117a78150fe2ef97db7cfc83bd57b2e2c0d0dd25eaf467a4a1c2a45ce1486").unwrap()[..]);
5676 assert_eq!(chan_utils::derive_public_key(&secp_ctx, &per_commitment_point, &base_point).unwrap().serialize()[..],
5677 hex::decode("0235f2dbfaa89b57ec7b055afe29849ef7ddfeb1cefdb9ebdc43f5494984db29e5").unwrap()[..]);
5679 assert_eq!(chan_utils::derive_private_key(&secp_ctx, &per_commitment_point, &base_secret).unwrap(),
5680 SecretKey::from_slice(&hex::decode("cbced912d3b21bf196a766651e436aff192362621ce317704ea2f75d87e7be0f").unwrap()[..]).unwrap());
5682 assert_eq!(chan_utils::derive_public_revocation_key(&secp_ctx, &per_commitment_point, &base_point).unwrap().serialize()[..],
5683 hex::decode("02916e326636d19c33f13e8c0c3a03dd157f332f3e99c317c141dd865eb01f8ff0").unwrap()[..]);
5685 assert_eq!(chan_utils::derive_private_revocation_key(&secp_ctx, &per_commitment_secret, &base_secret).unwrap(),
5686 SecretKey::from_slice(&hex::decode("d09ffff62ddb2297ab000cc85bcb4283fdeb6aa052affbc9dddcf33b61078110").unwrap()[..]).unwrap());