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, 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};
42 use std::{cmp,mem,fmt};
44 #[cfg(any(test, feature = "fuzztarget"))]
46 use bitcoin::hashes::hex::ToHex;
47 use bitcoin::blockdata::opcodes::all::OP_PUSHBYTES_0;
50 pub struct ChannelValueStat {
51 pub value_to_self_msat: u64,
52 pub channel_value_msat: u64,
53 pub channel_reserve_msat: u64,
54 pub pending_outbound_htlcs_amount_msat: u64,
55 pub pending_inbound_htlcs_amount_msat: u64,
56 pub holding_cell_outbound_amount_msat: u64,
57 pub counterparty_max_htlc_value_in_flight_msat: u64, // outgoing
58 pub counterparty_dust_limit_msat: u64,
61 enum InboundHTLCRemovalReason {
62 FailRelay(msgs::OnionErrorPacket),
63 FailMalformed(([u8; 32], u16)),
64 Fulfill(PaymentPreimage),
67 enum InboundHTLCState {
68 /// Offered by remote, to be included in next local commitment tx. I.e., the remote sent an
69 /// update_add_htlc message for this HTLC.
70 RemoteAnnounced(PendingHTLCStatus),
71 /// Included in a received commitment_signed message (implying we've
72 /// revoke_and_ack'd it), but the remote hasn't yet revoked their previous
73 /// state (see the example below). We have not yet included this HTLC in a
74 /// commitment_signed message because we are waiting on the remote's
75 /// aforementioned state revocation. One reason this missing remote RAA
76 /// (revoke_and_ack) blocks us from constructing a commitment_signed message
77 /// is because every time we create a new "state", i.e. every time we sign a
78 /// new commitment tx (see [BOLT #2]), we need a new per_commitment_point,
79 /// which are provided one-at-a-time in each RAA. E.g., the last RAA they
80 /// sent provided the per_commitment_point for our current commitment tx.
81 /// The other reason we should not send a commitment_signed without their RAA
82 /// is because their RAA serves to ACK our previous commitment_signed.
84 /// Here's an example of how an HTLC could come to be in this state:
85 /// remote --> update_add_htlc(prev_htlc) --> local
86 /// remote --> commitment_signed(prev_htlc) --> local
87 /// remote <-- revoke_and_ack <-- local
88 /// remote <-- commitment_signed(prev_htlc) <-- local
89 /// [note that here, the remote does not respond with a RAA]
90 /// remote --> update_add_htlc(this_htlc) --> local
91 /// remote --> commitment_signed(prev_htlc, this_htlc) --> local
92 /// Now `this_htlc` will be assigned this state. It's unable to be officially
93 /// accepted, i.e. included in a commitment_signed, because we're missing the
94 /// RAA that provides our next per_commitment_point. The per_commitment_point
95 /// is used to derive commitment keys, which are used to construct the
96 /// signatures in a commitment_signed message.
97 /// Implies AwaitingRemoteRevoke.
98 /// [BOLT #2]: https://github.com/lightningnetwork/lightning-rfc/blob/master/02-peer-protocol.md
99 AwaitingRemoteRevokeToAnnounce(PendingHTLCStatus),
100 /// Included in a received commitment_signed message (implying we've revoke_and_ack'd it).
101 /// We have also included this HTLC in our latest commitment_signed and are now just waiting
102 /// on the remote's revoke_and_ack to make this HTLC an irrevocable part of the state of the
103 /// channel (before it can then get forwarded and/or removed).
104 /// Implies AwaitingRemoteRevoke.
105 AwaitingAnnouncedRemoteRevoke(PendingHTLCStatus),
107 /// Removed by us and a new commitment_signed was sent (if we were AwaitingRemoteRevoke when we
108 /// created it we would have put it in the holding cell instead). When they next revoke_and_ack
110 /// Note that we have to keep an eye on the HTLC until we've received a broadcastable
111 /// commitment transaction without it as otherwise we'll have to force-close the channel to
112 /// claim it before the timeout (obviously doesn't apply to revoked HTLCs that we can't claim
113 /// anyway). That said, ChannelMonitor does this for us (see
114 /// ChannelMonitor::would_broadcast_at_height) so we actually remove the HTLC from our own
115 /// local state before then, once we're sure that the next commitment_signed and
116 /// ChannelMonitor::provide_latest_local_commitment_tx will not include this HTLC.
117 LocalRemoved(InboundHTLCRemovalReason),
120 struct InboundHTLCOutput {
124 payment_hash: PaymentHash,
125 state: InboundHTLCState,
128 enum OutboundHTLCState {
129 /// Added by us and included in a commitment_signed (if we were AwaitingRemoteRevoke when we
130 /// created it we would have put it in the holding cell instead). When they next revoke_and_ack
131 /// we will promote to Committed (note that they may not accept it until the next time we
132 /// revoke, but we don't really care about that:
133 /// * they've revoked, so worst case we can announce an old state and get our (option on)
134 /// money back (though we won't), and,
135 /// * we'll send them a revoke when they send a commitment_signed, and since only they're
136 /// allowed to remove it, the "can only be removed once committed on both sides" requirement
137 /// doesn't matter to us and it's up to them to enforce it, worst-case they jump ahead but
138 /// we'll never get out of sync).
139 /// Note that we Box the OnionPacket as it's rather large and we don't want to blow up
140 /// OutboundHTLCOutput's size just for a temporary bit
141 LocalAnnounced(Box<msgs::OnionPacket>),
143 /// Remote removed this (outbound) HTLC. We're waiting on their commitment_signed to finalize
144 /// the change (though they'll need to revoke before we fail the payment).
145 RemoteRemoved(Option<HTLCFailReason>),
146 /// Remote removed this and sent a commitment_signed (implying we've revoke_and_ack'ed it), but
147 /// the remote side hasn't yet revoked their previous state, which we need them to do before we
148 /// can do any backwards failing. Implies AwaitingRemoteRevoke.
149 /// We also have not yet removed this HTLC in a commitment_signed message, and are waiting on a
150 /// remote revoke_and_ack on a previous state before we can do so.
151 AwaitingRemoteRevokeToRemove(Option<HTLCFailReason>),
152 /// Remote removed this and sent a commitment_signed (implying we've revoke_and_ack'ed it), but
153 /// the remote side hasn't yet revoked their previous state, which we need them to do before we
154 /// can do any backwards failing. Implies AwaitingRemoteRevoke.
155 /// We have removed this HTLC in our latest commitment_signed and are now just waiting on a
156 /// revoke_and_ack to drop completely.
157 AwaitingRemovedRemoteRevoke(Option<HTLCFailReason>),
160 struct OutboundHTLCOutput {
164 payment_hash: PaymentHash,
165 state: OutboundHTLCState,
169 /// See AwaitingRemoteRevoke ChannelState for more info
170 enum HTLCUpdateAwaitingACK {
171 AddHTLC { // TODO: Time out if we're getting close to cltv_expiry
175 payment_hash: PaymentHash,
177 onion_routing_packet: msgs::OnionPacket,
180 payment_preimage: PaymentPreimage,
185 err_packet: msgs::OnionErrorPacket,
189 /// There are a few "states" and then a number of flags which can be applied:
190 /// We first move through init with OurInitSent -> TheirInitSent -> FundingCreated -> FundingSent.
191 /// TheirFundingLocked and OurFundingLocked then get set on FundingSent, and when both are set we
192 /// move on to ChannelFunded.
193 /// Note that PeerDisconnected can be set on both ChannelFunded and FundingSent.
194 /// ChannelFunded can then get all remaining flags set on it, until we finish shutdown, then we
195 /// move on to ShutdownComplete, at which point most calls into this channel are disallowed.
197 /// Implies we have (or are prepared to) send our open_channel/accept_channel message
198 OurInitSent = 1 << 0,
199 /// Implies we have received their open_channel/accept_channel message
200 TheirInitSent = 1 << 1,
201 /// We have sent funding_created and are awaiting a funding_signed to advance to FundingSent.
202 /// Note that this is nonsense for an inbound channel as we immediately generate funding_signed
203 /// upon receipt of funding_created, so simply skip this state.
205 /// Set when we have received/sent funding_created and funding_signed and are thus now waiting
206 /// on the funding transaction to confirm. The FundingLocked flags are set to indicate when we
207 /// and our counterparty consider the funding transaction confirmed.
209 /// Flag which can be set on FundingSent to indicate they sent us a funding_locked message.
210 /// Once both TheirFundingLocked and OurFundingLocked are set, state moves on to ChannelFunded.
211 TheirFundingLocked = 1 << 4,
212 /// Flag which can be set on FundingSent to indicate we sent them a funding_locked message.
213 /// Once both TheirFundingLocked and OurFundingLocked are set, state moves on to ChannelFunded.
214 OurFundingLocked = 1 << 5,
216 /// Flag which is set on ChannelFunded and FundingSent indicating remote side is considered
217 /// "disconnected" and no updates are allowed until after we've done a channel_reestablish
219 PeerDisconnected = 1 << 7,
220 /// Flag which is set on ChannelFunded, FundingCreated, and FundingSent indicating the user has
221 /// told us they failed to update our ChannelMonitor somewhere and we should pause sending any
222 /// outbound messages until they've managed to do so.
223 MonitorUpdateFailed = 1 << 8,
224 /// Flag which implies that we have sent a commitment_signed but are awaiting the responding
225 /// revoke_and_ack message. During this time period, we can't generate new commitment_signed
226 /// messages as then we will be unable to determine which HTLCs they included in their
227 /// revoke_and_ack implicit ACK, so instead we have to hold them away temporarily to be sent
229 /// Flag is set on ChannelFunded.
230 AwaitingRemoteRevoke = 1 << 9,
231 /// Flag which is set on ChannelFunded or FundingSent after receiving a shutdown message from
232 /// the remote end. If set, they may not add any new HTLCs to the channel, and we are expected
233 /// to respond with our own shutdown message when possible.
234 RemoteShutdownSent = 1 << 10,
235 /// Flag which is set on ChannelFunded or FundingSent after sending a shutdown message. At this
236 /// point, we may not add any new HTLCs to the channel.
237 /// TODO: Investigate some kind of timeout mechanism by which point the remote end must provide
238 /// us their shutdown.
239 LocalShutdownSent = 1 << 11,
240 /// We've successfully negotiated a closing_signed dance. At this point ChannelManager is about
241 /// to drop us, but we store this anyway.
242 ShutdownComplete = 4096,
244 const BOTH_SIDES_SHUTDOWN_MASK: u32 = ChannelState::LocalShutdownSent as u32 | ChannelState::RemoteShutdownSent as u32;
245 const MULTI_STATE_FLAGS: u32 = BOTH_SIDES_SHUTDOWN_MASK | ChannelState::PeerDisconnected as u32 | ChannelState::MonitorUpdateFailed as u32;
247 pub const INITIAL_COMMITMENT_NUMBER: u64 = (1 << 48) - 1;
249 /// Liveness is called to fluctuate given peer disconnecton/monitor failures/closing.
250 /// If channel is public, network should have a liveness view announced by us on a
251 /// best-effort, which means we may filter out some status transitions to avoid spam.
252 /// See further timer_chan_freshness_every_min.
255 /// Status has been gossiped.
257 /// Status has been changed.
259 /// Status has been marked to be gossiped at next flush
263 /// An enum indicating whether the local or remote side offered a given HTLC.
269 /// Used when calculating whether we or the remote can afford an additional HTLC.
270 struct HTLCCandidate {
272 origin: HTLCInitiator,
276 fn new(amount_msat: u64, origin: HTLCInitiator) -> Self {
284 /// Information needed for constructing an invoice route hint for this channel.
286 pub struct CounterpartyForwardingInfo {
287 /// Base routing fee in millisatoshis.
288 pub fee_base_msat: u32,
289 /// Amount in millionths of a satoshi the channel will charge per transferred satoshi.
290 pub fee_proportional_millionths: u32,
291 /// The minimum difference in cltv_expiry between an ingoing HTLC and its outgoing counterpart,
292 /// such that the outgoing HTLC is forwardable to this counterparty. See `msgs::ChannelUpdate`'s
293 /// `cltv_expiry_delta` for more details.
294 pub cltv_expiry_delta: u16,
297 // TODO: We should refactor this to be an Inbound/OutboundChannel until initial setup handshaking
298 // has been completed, and then turn into a Channel to get compiler-time enforcement of things like
299 // calling channel_id() before we're set up or things like get_outbound_funding_signed on an
302 // Holder designates channel data owned for the benefice of the user client.
303 // Counterparty designates channel data owned by the another channel participant entity.
304 pub(super) struct Channel<Signer: Sign> {
305 config: ChannelConfig,
309 channel_id: [u8; 32],
311 secp_ctx: Secp256k1<secp256k1::All>,
312 channel_value_satoshis: u64,
314 latest_monitor_update_id: u64,
316 holder_signer: Signer,
317 shutdown_pubkey: PublicKey,
318 destination_script: Script,
320 // Our commitment numbers start at 2^48-1 and count down, whereas the ones used in transaction
321 // generation start at 0 and count up...this simplifies some parts of implementation at the
322 // cost of others, but should really just be changed.
324 cur_holder_commitment_transaction_number: u64,
325 cur_counterparty_commitment_transaction_number: u64,
326 value_to_self_msat: u64, // Excluding all pending_htlcs, excluding fees
327 pending_inbound_htlcs: Vec<InboundHTLCOutput>,
328 pending_outbound_htlcs: Vec<OutboundHTLCOutput>,
329 holding_cell_htlc_updates: Vec<HTLCUpdateAwaitingACK>,
331 /// When resending CS/RAA messages on channel monitor restoration or on reconnect, we always
332 /// need to ensure we resend them in the order we originally generated them. Note that because
333 /// there can only ever be one in-flight CS and/or one in-flight RAA at any time, it is
334 /// sufficient to simply set this to the opposite of any message we are generating as we
335 /// generate it. ie when we generate a CS, we set this to RAAFirst as, if there is a pending
336 /// in-flight RAA to resend, it will have been the first thing we generated, and thus we should
338 resend_order: RAACommitmentOrder,
340 monitor_pending_funding_locked: bool,
341 monitor_pending_revoke_and_ack: bool,
342 monitor_pending_commitment_signed: bool,
343 monitor_pending_forwards: Vec<(PendingHTLCInfo, u64)>,
344 monitor_pending_failures: Vec<(HTLCSource, PaymentHash, HTLCFailReason)>,
346 // pending_update_fee is filled when sending and receiving update_fee
347 // For outbound channel, feerate_per_kw is updated with the value from
348 // pending_update_fee when revoke_and_ack is received
350 // For inbound channel, feerate_per_kw is updated when it receives
351 // commitment_signed and revoke_and_ack is generated
352 // The pending value is kept when another pair of update_fee and commitment_signed
353 // is received during AwaitingRemoteRevoke and relieved when the expected
354 // revoke_and_ack is received and new commitment_signed is generated to be
355 // sent to the funder. Otherwise, the pending value is removed when receiving
356 // commitment_signed.
357 pending_update_fee: Option<u32>,
358 // update_fee() during ChannelState::AwaitingRemoteRevoke is hold in
359 // holdina_cell_update_fee then moved to pending_udpate_fee when revoke_and_ack
360 // is received. holding_cell_update_fee is updated when there are additional
361 // update_fee() during ChannelState::AwaitingRemoteRevoke.
362 holding_cell_update_fee: Option<u32>,
363 next_holder_htlc_id: u64,
364 next_counterparty_htlc_id: u64,
365 update_time_counter: u32,
368 #[cfg(debug_assertions)]
369 /// Max to_local and to_remote outputs in a locally-generated commitment transaction
370 holder_max_commitment_tx_output: ::std::sync::Mutex<(u64, u64)>,
371 #[cfg(debug_assertions)]
372 /// Max to_local and to_remote outputs in a remote-generated commitment transaction
373 counterparty_max_commitment_tx_output: ::std::sync::Mutex<(u64, u64)>,
375 last_sent_closing_fee: Option<(u32, u64, Signature)>, // (feerate, fee, holder_sig)
377 /// The hash of the block in which the funding transaction reached our CONF_TARGET. We use this
378 /// to detect unconfirmation after a serialize-unserialize roundtrip where we may not see a full
379 /// series of block_connected/block_disconnected calls. Obviously this is not a guarantee as we
380 /// could miss the funding_tx_confirmed_in block as well, but it serves as a useful fallback.
381 funding_tx_confirmed_in: Option<BlockHash>,
382 short_channel_id: Option<u64>,
383 funding_tx_confirmations: u64,
385 counterparty_dust_limit_satoshis: u64,
387 pub(super) holder_dust_limit_satoshis: u64,
389 holder_dust_limit_satoshis: u64,
391 pub(super) counterparty_max_htlc_value_in_flight_msat: u64,
393 counterparty_max_htlc_value_in_flight_msat: u64,
394 //get_holder_max_htlc_value_in_flight_msat(): u64,
395 /// minimum channel reserve for self to maintain - set by them.
396 counterparty_selected_channel_reserve_satoshis: u64,
397 // get_holder_selected_channel_reserve_satoshis(channel_value_sats: u64): u64
398 counterparty_htlc_minimum_msat: u64,
399 holder_htlc_minimum_msat: u64,
401 pub counterparty_max_accepted_htlcs: u16,
403 counterparty_max_accepted_htlcs: u16,
404 //implied by OUR_MAX_HTLCS: max_accepted_htlcs: u16,
407 counterparty_forwarding_info: Option<CounterpartyForwardingInfo>,
409 pub(crate) channel_transaction_parameters: ChannelTransactionParameters,
411 counterparty_cur_commitment_point: Option<PublicKey>,
413 counterparty_prev_commitment_point: Option<PublicKey>,
414 counterparty_node_id: PublicKey,
416 counterparty_shutdown_scriptpubkey: Option<Script>,
418 commitment_secrets: CounterpartyCommitmentSecrets,
420 network_sync: UpdateStatus,
422 // We save these values so we can make sure `next_local_commit_tx_fee_msat` and
423 // `next_remote_commit_tx_fee_msat` properly predict what the next commitment transaction fee will
424 // be, by comparing the cached values to the fee of the tranaction generated by
425 // `build_commitment_transaction`.
426 #[cfg(any(test, feature = "fuzztarget"))]
427 next_local_commitment_tx_fee_info_cached: Mutex<Option<CommitmentTxInfoCached>>,
428 #[cfg(any(test, feature = "fuzztarget"))]
429 next_remote_commitment_tx_fee_info_cached: Mutex<Option<CommitmentTxInfoCached>>,
432 #[cfg(any(test, feature = "fuzztarget"))]
433 struct CommitmentTxInfoCached {
435 total_pending_htlcs: usize,
436 next_holder_htlc_id: u64,
437 next_counterparty_htlc_id: u64,
441 pub const OUR_MAX_HTLCS: u16 = 50; //TODO
442 /// Confirmation count threshold at which we close a channel. Ideally we'd keep the channel around
443 /// on ice until the funding transaction gets more confirmations, but the LN protocol doesn't
444 /// really allow for this, so instead we're stuck closing it out at that point.
445 const UNCONF_THRESHOLD: u32 = 6;
446 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
447 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?)
450 const COMMITMENT_TX_BASE_WEIGHT: u64 = 724;
452 pub const COMMITMENT_TX_BASE_WEIGHT: u64 = 724;
454 const COMMITMENT_TX_WEIGHT_PER_HTLC: u64 = 172;
456 pub const COMMITMENT_TX_WEIGHT_PER_HTLC: u64 = 172;
458 /// Maximmum `funding_satoshis` value, according to the BOLT #2 specification
460 pub const MAX_FUNDING_SATOSHIS: u64 = 1 << 24;
462 /// Used to return a simple Error back to ChannelManager. Will get converted to a
463 /// msgs::ErrorAction::SendErrorMessage or msgs::ErrorAction::IgnoreError as appropriate with our
464 /// channel_id in ChannelManager.
465 pub(super) enum ChannelError {
468 CloseDelayBroadcast(String),
471 impl fmt::Debug for ChannelError {
472 fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
474 &ChannelError::Ignore(ref e) => write!(f, "Ignore : {}", e),
475 &ChannelError::Close(ref e) => write!(f, "Close : {}", e),
476 &ChannelError::CloseDelayBroadcast(ref e) => write!(f, "CloseDelayBroadcast : {}", e)
481 macro_rules! secp_check {
482 ($res: expr, $err: expr) => {
485 Err(_) => return Err(ChannelError::Close($err)),
490 impl<Signer: Sign> Channel<Signer> {
491 // Convert constants + channel value to limits:
492 fn get_holder_max_htlc_value_in_flight_msat(channel_value_satoshis: u64) -> u64 {
493 channel_value_satoshis * 1000 / 10 //TODO
496 /// Returns a minimum channel reserve value the remote needs to maintain,
499 /// Guaranteed to return a value no larger than channel_value_satoshis
500 pub(crate) fn get_holder_selected_channel_reserve_satoshis(channel_value_satoshis: u64) -> u64 {
501 let (q, _) = channel_value_satoshis.overflowing_div(100);
502 cmp::min(channel_value_satoshis, cmp::max(q, 1000)) //TODO
505 fn derive_holder_dust_limit_satoshis(at_open_background_feerate: u32) -> u64 {
506 cmp::max(at_open_background_feerate as u64 * B_OUTPUT_PLUS_SPENDING_INPUT_WEIGHT / 1000, 546) //TODO
510 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>
511 where K::Target: KeysInterface<Signer = Signer>,
512 F::Target: FeeEstimator,
514 let holder_selected_contest_delay = config.own_channel_config.our_to_self_delay;
515 let holder_signer = keys_provider.get_channel_signer(false, channel_value_satoshis);
516 let pubkeys = holder_signer.pubkeys().clone();
518 if channel_value_satoshis >= MAX_FUNDING_SATOSHIS {
519 return Err(APIError::APIMisuseError{err: format!("funding_value must be smaller than {}, it was {}", MAX_FUNDING_SATOSHIS, channel_value_satoshis)});
521 let channel_value_msat = channel_value_satoshis * 1000;
522 if push_msat > channel_value_msat {
523 return Err(APIError::APIMisuseError { err: format!("Push value ({}) was larger than channel_value ({})", push_msat, channel_value_msat) });
525 if holder_selected_contest_delay < BREAKDOWN_TIMEOUT {
526 return Err(APIError::APIMisuseError {err: format!("Configured with an unreasonable our_to_self_delay ({}) putting user funds at risks", holder_selected_contest_delay)});
528 let background_feerate = fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Background);
529 if Channel::<Signer>::get_holder_selected_channel_reserve_satoshis(channel_value_satoshis) < Channel::<Signer>::derive_holder_dust_limit_satoshis(background_feerate) {
530 return Err(APIError::FeeRateTooHigh{err: format!("Not enough reserve above dust limit can be found at current fee rate({})", background_feerate), feerate: background_feerate});
533 let feerate = fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Normal);
535 let mut secp_ctx = Secp256k1::new();
536 secp_ctx.seeded_randomize(&keys_provider.get_secure_random_bytes());
540 config: config.channel_options.clone(),
542 channel_id: keys_provider.get_secure_random_bytes(),
543 channel_state: ChannelState::OurInitSent as u32,
545 channel_value_satoshis,
547 latest_monitor_update_id: 0,
550 shutdown_pubkey: keys_provider.get_shutdown_pubkey(),
551 destination_script: keys_provider.get_destination_script(),
553 cur_holder_commitment_transaction_number: INITIAL_COMMITMENT_NUMBER,
554 cur_counterparty_commitment_transaction_number: INITIAL_COMMITMENT_NUMBER,
555 value_to_self_msat: channel_value_satoshis * 1000 - push_msat,
557 pending_inbound_htlcs: Vec::new(),
558 pending_outbound_htlcs: Vec::new(),
559 holding_cell_htlc_updates: Vec::new(),
560 pending_update_fee: None,
561 holding_cell_update_fee: None,
562 next_holder_htlc_id: 0,
563 next_counterparty_htlc_id: 0,
564 update_time_counter: 1,
566 resend_order: RAACommitmentOrder::CommitmentFirst,
568 monitor_pending_funding_locked: false,
569 monitor_pending_revoke_and_ack: false,
570 monitor_pending_commitment_signed: false,
571 monitor_pending_forwards: Vec::new(),
572 monitor_pending_failures: Vec::new(),
574 #[cfg(debug_assertions)]
575 holder_max_commitment_tx_output: ::std::sync::Mutex::new((channel_value_satoshis * 1000 - push_msat, push_msat)),
576 #[cfg(debug_assertions)]
577 counterparty_max_commitment_tx_output: ::std::sync::Mutex::new((channel_value_satoshis * 1000 - push_msat, push_msat)),
579 last_sent_closing_fee: None,
581 funding_tx_confirmed_in: None,
582 short_channel_id: None,
583 funding_tx_confirmations: 0,
585 feerate_per_kw: feerate,
586 counterparty_dust_limit_satoshis: 0,
587 holder_dust_limit_satoshis: Channel::<Signer>::derive_holder_dust_limit_satoshis(background_feerate),
588 counterparty_max_htlc_value_in_flight_msat: 0,
589 counterparty_selected_channel_reserve_satoshis: 0,
590 counterparty_htlc_minimum_msat: 0,
591 holder_htlc_minimum_msat: if config.own_channel_config.our_htlc_minimum_msat == 0 { 1 } else { config.own_channel_config.our_htlc_minimum_msat },
592 counterparty_max_accepted_htlcs: 0,
593 minimum_depth: 0, // Filled in in accept_channel
595 counterparty_forwarding_info: None,
597 channel_transaction_parameters: ChannelTransactionParameters {
598 holder_pubkeys: pubkeys,
599 holder_selected_contest_delay: config.own_channel_config.our_to_self_delay,
600 is_outbound_from_holder: true,
601 counterparty_parameters: None,
602 funding_outpoint: None
604 counterparty_cur_commitment_point: None,
606 counterparty_prev_commitment_point: None,
607 counterparty_node_id,
609 counterparty_shutdown_scriptpubkey: None,
611 commitment_secrets: CounterpartyCommitmentSecrets::new(),
613 network_sync: UpdateStatus::Fresh,
615 #[cfg(any(test, feature = "fuzztarget"))]
616 next_local_commitment_tx_fee_info_cached: Mutex::new(None),
617 #[cfg(any(test, feature = "fuzztarget"))]
618 next_remote_commitment_tx_fee_info_cached: Mutex::new(None),
622 fn check_remote_fee<F: Deref>(fee_estimator: &F, feerate_per_kw: u32) -> Result<(), ChannelError>
623 where F::Target: FeeEstimator
625 let lower_limit = fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Background);
626 if feerate_per_kw < lower_limit {
627 return Err(ChannelError::Close(format!("Peer's feerate much too low. Actual: {}. Our expected lower limit: {}", feerate_per_kw, lower_limit)));
629 let upper_limit = fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::HighPriority) as u64 * 2;
630 if feerate_per_kw as u64 > upper_limit {
631 return Err(ChannelError::Close(format!("Peer's feerate much too high. Actual: {}. Our expected upper limit: {}", feerate_per_kw, upper_limit)));
636 /// Creates a new channel from a remote sides' request for one.
637 /// Assumes chain_hash has already been checked and corresponds with what we expect!
638 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>
639 where K::Target: KeysInterface<Signer = Signer>,
640 F::Target: FeeEstimator
642 let holder_signer = keys_provider.get_channel_signer(true, msg.funding_satoshis);
643 let pubkeys = holder_signer.pubkeys().clone();
644 let counterparty_pubkeys = ChannelPublicKeys {
645 funding_pubkey: msg.funding_pubkey,
646 revocation_basepoint: msg.revocation_basepoint,
647 payment_point: msg.payment_point,
648 delayed_payment_basepoint: msg.delayed_payment_basepoint,
649 htlc_basepoint: msg.htlc_basepoint
651 let mut local_config = (*config).channel_options.clone();
653 if config.own_channel_config.our_to_self_delay < BREAKDOWN_TIMEOUT {
654 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)));
657 // Check sanity of message fields:
658 if msg.funding_satoshis >= MAX_FUNDING_SATOSHIS {
659 return Err(ChannelError::Close(format!("Funding must be smaller than {}. It was {}", MAX_FUNDING_SATOSHIS, msg.funding_satoshis)));
661 if msg.channel_reserve_satoshis > msg.funding_satoshis {
662 return Err(ChannelError::Close(format!("Bogus channel_reserve_satoshis ({}). Must be not greater than funding_satoshis: {}", msg.channel_reserve_satoshis, msg.funding_satoshis)));
664 let funding_value = (msg.funding_satoshis - msg.channel_reserve_satoshis) * 1000;
665 if msg.push_msat > funding_value {
666 return Err(ChannelError::Close(format!("push_msat {} was larger than funding value {}", msg.push_msat, funding_value)));
668 if msg.dust_limit_satoshis > msg.funding_satoshis {
669 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)));
671 if msg.dust_limit_satoshis > msg.channel_reserve_satoshis {
672 return Err(ChannelError::Close(format!("Bogus; channel reserve ({}) is less than dust limit ({})", msg.channel_reserve_satoshis, msg.dust_limit_satoshis)));
674 let full_channel_value_msat = (msg.funding_satoshis - msg.channel_reserve_satoshis) * 1000;
675 if msg.htlc_minimum_msat >= full_channel_value_msat {
676 return Err(ChannelError::Close(format!("Minimum htlc value ({}) was larger than full channel value ({})", msg.htlc_minimum_msat, full_channel_value_msat)));
678 Channel::<Signer>::check_remote_fee(fee_estimator, msg.feerate_per_kw)?;
680 let max_counterparty_selected_contest_delay = u16::min(config.peer_channel_config_limits.their_to_self_delay, MAX_LOCAL_BREAKDOWN_TIMEOUT);
681 if msg.to_self_delay > max_counterparty_selected_contest_delay {
682 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)));
684 if msg.max_accepted_htlcs < 1 {
685 return Err(ChannelError::Close("0 max_accepted_htlcs makes for a useless channel".to_owned()));
687 if msg.max_accepted_htlcs > MAX_HTLCS {
688 return Err(ChannelError::Close(format!("max_accepted_htlcs was {}. It must not be larger than {}", msg.max_accepted_htlcs, MAX_HTLCS)));
691 // Now check against optional parameters as set by config...
692 if msg.funding_satoshis < config.peer_channel_config_limits.min_funding_satoshis {
693 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)));
695 if msg.htlc_minimum_msat > config.peer_channel_config_limits.max_htlc_minimum_msat {
696 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)));
698 if msg.max_htlc_value_in_flight_msat < config.peer_channel_config_limits.min_max_htlc_value_in_flight_msat {
699 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)));
701 if msg.channel_reserve_satoshis > config.peer_channel_config_limits.max_channel_reserve_satoshis {
702 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)));
704 if msg.max_accepted_htlcs < config.peer_channel_config_limits.min_max_accepted_htlcs {
705 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)));
707 if msg.dust_limit_satoshis < config.peer_channel_config_limits.min_dust_limit_satoshis {
708 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)));
710 if msg.dust_limit_satoshis > config.peer_channel_config_limits.max_dust_limit_satoshis {
711 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)));
714 // Convert things into internal flags and prep our state:
716 let announce = if (msg.channel_flags & 1) == 1 { true } else { false };
717 if config.peer_channel_config_limits.force_announced_channel_preference {
718 if local_config.announced_channel != announce {
719 return Err(ChannelError::Close("Peer tried to open channel but their announcement preference is different from ours".to_owned()));
722 // we either accept their preference or the preferences match
723 local_config.announced_channel = announce;
725 let background_feerate = fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Background);
727 let holder_dust_limit_satoshis = Channel::<Signer>::derive_holder_dust_limit_satoshis(background_feerate);
728 let holder_selected_channel_reserve_satoshis = Channel::<Signer>::get_holder_selected_channel_reserve_satoshis(msg.funding_satoshis);
729 if holder_selected_channel_reserve_satoshis < holder_dust_limit_satoshis {
730 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)));
732 if msg.channel_reserve_satoshis < holder_dust_limit_satoshis {
733 return Err(ChannelError::Close(format!("channel_reserve_satoshis ({}) is smaller than our dust limit ({})", msg.channel_reserve_satoshis, holder_dust_limit_satoshis)));
735 if holder_selected_channel_reserve_satoshis < msg.dust_limit_satoshis {
736 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)));
739 // check if the funder's amount for the initial commitment tx is sufficient
740 // for full fee payment
741 let funders_amount_msat = msg.funding_satoshis * 1000 - msg.push_msat;
742 let lower_limit = background_feerate as u64 * COMMITMENT_TX_BASE_WEIGHT;
743 if funders_amount_msat < lower_limit {
744 return Err(ChannelError::Close(format!("Insufficient funding amount ({}) for initial commitment. Must be at least {}", funders_amount_msat, lower_limit)));
747 let to_local_msat = msg.push_msat;
748 let to_remote_msat = funders_amount_msat - background_feerate as u64 * COMMITMENT_TX_BASE_WEIGHT;
749 if to_local_msat <= msg.channel_reserve_satoshis * 1000 && to_remote_msat <= holder_selected_channel_reserve_satoshis * 1000 {
750 return Err(ChannelError::Close("Insufficient funding amount for initial commitment".to_owned()));
753 let counterparty_shutdown_scriptpubkey = if their_features.supports_upfront_shutdown_script() {
754 match &msg.shutdown_scriptpubkey {
755 &OptionalField::Present(ref script) => {
756 // Peer is signaling upfront_shutdown and has opt-out with a 0-length script. We don't enforce anything
757 if script.len() == 0 {
759 // Peer is signaling upfront_shutdown and has provided a non-accepted scriptpubkey format. Fail the channel
760 } else if is_unsupported_shutdown_script(&their_features, script) {
761 return Err(ChannelError::Close(format!("Peer is signaling upfront_shutdown but has provided a non-accepted scriptpubkey format. script: ({})", script.to_bytes().to_hex())));
766 // 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
767 &OptionalField::Absent => {
768 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()));
773 let mut secp_ctx = Secp256k1::new();
774 secp_ctx.seeded_randomize(&keys_provider.get_secure_random_bytes());
778 config: local_config,
780 channel_id: msg.temporary_channel_id,
781 channel_state: (ChannelState::OurInitSent as u32) | (ChannelState::TheirInitSent as u32),
784 latest_monitor_update_id: 0,
787 shutdown_pubkey: keys_provider.get_shutdown_pubkey(),
788 destination_script: keys_provider.get_destination_script(),
790 cur_holder_commitment_transaction_number: INITIAL_COMMITMENT_NUMBER,
791 cur_counterparty_commitment_transaction_number: INITIAL_COMMITMENT_NUMBER,
792 value_to_self_msat: msg.push_msat,
794 pending_inbound_htlcs: Vec::new(),
795 pending_outbound_htlcs: Vec::new(),
796 holding_cell_htlc_updates: Vec::new(),
797 pending_update_fee: None,
798 holding_cell_update_fee: None,
799 next_holder_htlc_id: 0,
800 next_counterparty_htlc_id: 0,
801 update_time_counter: 1,
803 resend_order: RAACommitmentOrder::CommitmentFirst,
805 monitor_pending_funding_locked: false,
806 monitor_pending_revoke_and_ack: false,
807 monitor_pending_commitment_signed: false,
808 monitor_pending_forwards: Vec::new(),
809 monitor_pending_failures: Vec::new(),
811 #[cfg(debug_assertions)]
812 holder_max_commitment_tx_output: ::std::sync::Mutex::new((msg.push_msat, msg.funding_satoshis * 1000 - msg.push_msat)),
813 #[cfg(debug_assertions)]
814 counterparty_max_commitment_tx_output: ::std::sync::Mutex::new((msg.push_msat, msg.funding_satoshis * 1000 - msg.push_msat)),
816 last_sent_closing_fee: None,
818 funding_tx_confirmed_in: None,
819 short_channel_id: None,
820 funding_tx_confirmations: 0,
822 feerate_per_kw: msg.feerate_per_kw,
823 channel_value_satoshis: msg.funding_satoshis,
824 counterparty_dust_limit_satoshis: msg.dust_limit_satoshis,
825 holder_dust_limit_satoshis,
826 counterparty_max_htlc_value_in_flight_msat: cmp::min(msg.max_htlc_value_in_flight_msat, msg.funding_satoshis * 1000),
827 counterparty_selected_channel_reserve_satoshis: msg.channel_reserve_satoshis,
828 counterparty_htlc_minimum_msat: msg.htlc_minimum_msat,
829 holder_htlc_minimum_msat: if config.own_channel_config.our_htlc_minimum_msat == 0 { 1 } else { config.own_channel_config.our_htlc_minimum_msat },
830 counterparty_max_accepted_htlcs: msg.max_accepted_htlcs,
831 minimum_depth: config.own_channel_config.minimum_depth,
833 counterparty_forwarding_info: None,
835 channel_transaction_parameters: ChannelTransactionParameters {
836 holder_pubkeys: pubkeys,
837 holder_selected_contest_delay: config.own_channel_config.our_to_self_delay,
838 is_outbound_from_holder: false,
839 counterparty_parameters: Some(CounterpartyChannelTransactionParameters {
840 selected_contest_delay: msg.to_self_delay,
841 pubkeys: counterparty_pubkeys,
843 funding_outpoint: None
845 counterparty_cur_commitment_point: Some(msg.first_per_commitment_point),
847 counterparty_prev_commitment_point: None,
848 counterparty_node_id,
850 counterparty_shutdown_scriptpubkey,
852 commitment_secrets: CounterpartyCommitmentSecrets::new(),
854 network_sync: UpdateStatus::Fresh,
856 #[cfg(any(test, feature = "fuzztarget"))]
857 next_local_commitment_tx_fee_info_cached: Mutex::new(None),
858 #[cfg(any(test, feature = "fuzztarget"))]
859 next_remote_commitment_tx_fee_info_cached: Mutex::new(None),
865 /// Transaction nomenclature is somewhat confusing here as there are many different cases - a
866 /// transaction is referred to as "a's transaction" implying that a will be able to broadcast
867 /// the transaction. Thus, b will generally be sending a signature over such a transaction to
868 /// a, and a can revoke the transaction by providing b the relevant per_commitment_secret. As
869 /// such, a transaction is generally the result of b increasing the amount paid to a (or adding
871 /// @local is used only to convert relevant internal structures which refer to remote vs local
872 /// to decide value of outputs and direction of HTLCs.
873 /// @generated_by_local is used to determine *which* HTLCs to include - noting that the HTLC
874 /// state may indicate that one peer has informed the other that they'd like to add an HTLC but
875 /// have not yet committed it. Such HTLCs will only be included in transactions which are being
876 /// generated by the peer which proposed adding the HTLCs, and thus we need to understand both
877 /// which peer generated this transaction and "to whom" this transaction flows.
878 /// Returns (the transaction info, the number of HTLC outputs which were present in the
879 /// transaction, the list of HTLCs which were not ignored when building the transaction).
880 /// Note that below-dust HTLCs are included in the third return value, but not the second, and
881 /// sources are provided only for outbound HTLCs in the third return value.
883 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 {
884 let mut included_dust_htlcs: Vec<(HTLCOutputInCommitment, Option<&HTLCSource>)> = Vec::new();
885 let num_htlcs = self.pending_inbound_htlcs.len() + self.pending_outbound_htlcs.len();
886 let mut included_non_dust_htlcs: Vec<(HTLCOutputInCommitment, Option<&HTLCSource>)> = Vec::with_capacity(num_htlcs);
888 let broadcaster_dust_limit_satoshis = if local { self.holder_dust_limit_satoshis } else { self.counterparty_dust_limit_satoshis };
889 let mut remote_htlc_total_msat = 0;
890 let mut local_htlc_total_msat = 0;
891 let mut value_to_self_msat_offset = 0;
893 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);
895 macro_rules! get_htlc_in_commitment {
896 ($htlc: expr, $offered: expr) => {
897 HTLCOutputInCommitment {
899 amount_msat: $htlc.amount_msat,
900 cltv_expiry: $htlc.cltv_expiry,
901 payment_hash: $htlc.payment_hash,
902 transaction_output_index: None
907 macro_rules! add_htlc_output {
908 ($htlc: expr, $outbound: expr, $source: expr, $state_name: expr) => {
909 if $outbound == local { // "offered HTLC output"
910 let htlc_in_tx = get_htlc_in_commitment!($htlc, true);
911 if $htlc.amount_msat / 1000 >= broadcaster_dust_limit_satoshis + (feerate_per_kw as u64 * HTLC_TIMEOUT_TX_WEIGHT / 1000) {
912 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);
913 included_non_dust_htlcs.push((htlc_in_tx, $source));
915 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);
916 included_dust_htlcs.push((htlc_in_tx, $source));
919 let htlc_in_tx = get_htlc_in_commitment!($htlc, false);
920 if $htlc.amount_msat / 1000 >= broadcaster_dust_limit_satoshis + (feerate_per_kw as u64 * HTLC_SUCCESS_TX_WEIGHT / 1000) {
921 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);
922 included_non_dust_htlcs.push((htlc_in_tx, $source));
924 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);
925 included_dust_htlcs.push((htlc_in_tx, $source));
931 for ref htlc in self.pending_inbound_htlcs.iter() {
932 let (include, state_name) = match htlc.state {
933 InboundHTLCState::RemoteAnnounced(_) => (!generated_by_local, "RemoteAnnounced"),
934 InboundHTLCState::AwaitingRemoteRevokeToAnnounce(_) => (!generated_by_local, "AwaitingRemoteRevokeToAnnounce"),
935 InboundHTLCState::AwaitingAnnouncedRemoteRevoke(_) => (true, "AwaitingAnnouncedRemoteRevoke"),
936 InboundHTLCState::Committed => (true, "Committed"),
937 InboundHTLCState::LocalRemoved(_) => (!generated_by_local, "LocalRemoved"),
941 add_htlc_output!(htlc, false, None, state_name);
942 remote_htlc_total_msat += htlc.amount_msat;
944 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);
946 &InboundHTLCState::LocalRemoved(ref reason) => {
947 if generated_by_local {
948 if let &InboundHTLCRemovalReason::Fulfill(_) = reason {
949 value_to_self_msat_offset += htlc.amount_msat as i64;
958 for ref htlc in self.pending_outbound_htlcs.iter() {
959 let (include, state_name) = match htlc.state {
960 OutboundHTLCState::LocalAnnounced(_) => (generated_by_local, "LocalAnnounced"),
961 OutboundHTLCState::Committed => (true, "Committed"),
962 OutboundHTLCState::RemoteRemoved(_) => (generated_by_local, "RemoteRemoved"),
963 OutboundHTLCState::AwaitingRemoteRevokeToRemove(_) => (generated_by_local, "AwaitingRemoteRevokeToRemove"),
964 OutboundHTLCState::AwaitingRemovedRemoteRevoke(_) => (false, "AwaitingRemovedRemoteRevoke"),
968 add_htlc_output!(htlc, true, Some(&htlc.source), state_name);
969 local_htlc_total_msat += htlc.amount_msat;
971 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);
973 OutboundHTLCState::AwaitingRemoteRevokeToRemove(None)|OutboundHTLCState::AwaitingRemovedRemoteRevoke(None) => {
974 value_to_self_msat_offset -= htlc.amount_msat as i64;
976 OutboundHTLCState::RemoteRemoved(None) => {
977 if !generated_by_local {
978 value_to_self_msat_offset -= htlc.amount_msat as i64;
986 let value_to_self_msat: i64 = (self.value_to_self_msat - local_htlc_total_msat) as i64 + value_to_self_msat_offset;
987 assert!(value_to_self_msat >= 0);
988 // Note that in case they have several just-awaiting-last-RAA fulfills in-progress (ie
989 // AwaitingRemoteRevokeToRemove or AwaitingRemovedRemoteRevoke) we may have allowed them to
990 // "violate" their reserve value by couting those against it. Thus, we have to convert
991 // everything to i64 before subtracting as otherwise we can overflow.
992 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;
993 assert!(value_to_remote_msat >= 0);
995 #[cfg(debug_assertions)]
997 // Make sure that the to_self/to_remote is always either past the appropriate
998 // channel_reserve *or* it is making progress towards it.
999 let mut broadcaster_max_commitment_tx_output = if generated_by_local {
1000 self.holder_max_commitment_tx_output.lock().unwrap()
1002 self.counterparty_max_commitment_tx_output.lock().unwrap()
1004 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);
1005 broadcaster_max_commitment_tx_output.0 = cmp::max(broadcaster_max_commitment_tx_output.0, value_to_self_msat as u64);
1006 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);
1007 broadcaster_max_commitment_tx_output.1 = cmp::max(broadcaster_max_commitment_tx_output.1, value_to_remote_msat as u64);
1010 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;
1011 let (value_to_self, value_to_remote) = if self.is_outbound() {
1012 (value_to_self_msat / 1000 - total_fee as i64, value_to_remote_msat / 1000)
1014 (value_to_self_msat / 1000, value_to_remote_msat / 1000 - total_fee as i64)
1017 let mut value_to_a = if local { value_to_self } else { value_to_remote };
1018 let mut value_to_b = if local { value_to_remote } else { value_to_self };
1020 if value_to_a >= (broadcaster_dust_limit_satoshis as i64) {
1021 log_trace!(logger, " ...including {} output with value {}", if local { "to_local" } else { "to_remote" }, value_to_a);
1026 if value_to_b >= (broadcaster_dust_limit_satoshis as i64) {
1027 log_trace!(logger, " ...including {} output with value {}", if local { "to_remote" } else { "to_local" }, value_to_b);
1032 let num_nondust_htlcs = included_non_dust_htlcs.len();
1034 let channel_parameters =
1035 if local { self.channel_transaction_parameters.as_holder_broadcastable() }
1036 else { self.channel_transaction_parameters.as_counterparty_broadcastable() };
1037 let tx = CommitmentTransaction::new_with_auxiliary_htlc_data(commitment_number,
1042 &mut included_non_dust_htlcs,
1045 let mut htlcs_included = included_non_dust_htlcs;
1046 // The unwrap is safe, because all non-dust HTLCs have been assigned an output index
1047 htlcs_included.sort_unstable_by_key(|h| h.0.transaction_output_index.unwrap());
1048 htlcs_included.append(&mut included_dust_htlcs);
1050 (tx, num_nondust_htlcs, htlcs_included)
1054 fn get_closing_scriptpubkey(&self) -> Script {
1055 let channel_close_key_hash = WPubkeyHash::hash(&self.shutdown_pubkey.serialize());
1056 Builder::new().push_opcode(opcodes::all::OP_PUSHBYTES_0).push_slice(&channel_close_key_hash[..]).into_script()
1060 fn get_closing_transaction_weight(&self, a_scriptpubkey: Option<&Script>, b_scriptpubkey: Option<&Script>) -> u64 {
1065 1 + // script length (0)
1069 )*4 + // * 4 for non-witness parts
1070 2 + // witness marker and flag
1071 1 + // witness element count
1072 4 + // 4 element lengths (2 sigs, multisig dummy, and witness script)
1073 self.get_funding_redeemscript().len() as u64 + // funding witness script
1074 2*(1 + 71); // two signatures + sighash type flags
1075 if let Some(spk) = a_scriptpubkey {
1076 ret += ((8+1) + // output values and script length
1077 spk.len() as u64) * 4; // scriptpubkey and witness multiplier
1079 if let Some(spk) = b_scriptpubkey {
1080 ret += ((8+1) + // output values and script length
1081 spk.len() as u64) * 4; // scriptpubkey and witness multiplier
1087 fn build_closing_transaction(&self, proposed_total_fee_satoshis: u64, skip_remote_output: bool) -> (Transaction, u64) {
1089 let mut ins: Vec<TxIn> = Vec::new();
1091 previous_output: self.funding_outpoint().into_bitcoin_outpoint(),
1092 script_sig: Script::new(),
1093 sequence: 0xffffffff,
1094 witness: Vec::new(),
1099 assert!(self.pending_inbound_htlcs.is_empty());
1100 assert!(self.pending_outbound_htlcs.is_empty());
1101 let mut txouts: Vec<(TxOut, ())> = Vec::new();
1103 let mut total_fee_satoshis = proposed_total_fee_satoshis;
1104 let value_to_self: i64 = (self.value_to_self_msat as i64) / 1000 - if self.is_outbound() { total_fee_satoshis as i64 } else { 0 };
1105 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 };
1107 if value_to_self < 0 {
1108 assert!(self.is_outbound());
1109 total_fee_satoshis += (-value_to_self) as u64;
1110 } else if value_to_remote < 0 {
1111 assert!(!self.is_outbound());
1112 total_fee_satoshis += (-value_to_remote) as u64;
1115 if !skip_remote_output && value_to_remote as u64 > self.holder_dust_limit_satoshis {
1116 txouts.push((TxOut {
1117 script_pubkey: self.counterparty_shutdown_scriptpubkey.clone().unwrap(),
1118 value: value_to_remote as u64
1122 if value_to_self as u64 > self.holder_dust_limit_satoshis {
1123 txouts.push((TxOut {
1124 script_pubkey: self.get_closing_scriptpubkey(),
1125 value: value_to_self as u64
1129 transaction_utils::sort_outputs(&mut txouts, |_, _| { cmp::Ordering::Equal }); // Ordering doesnt matter if they used our pubkey...
1131 let mut outputs: Vec<TxOut> = Vec::new();
1132 for out in txouts.drain(..) {
1133 outputs.push(out.0);
1141 }, total_fee_satoshis)
1144 fn funding_outpoint(&self) -> OutPoint {
1145 self.channel_transaction_parameters.funding_outpoint.unwrap()
1149 /// Creates a set of keys for build_commitment_transaction to generate a transaction which our
1150 /// counterparty will sign (ie DO NOT send signatures over a transaction created by this to
1151 /// our counterparty!)
1152 /// The result is a transaction which we can revoke broadcastership of (ie a "local" transaction)
1153 /// TODO Some magic rust shit to compile-time check this?
1154 fn build_holder_transaction_keys(&self, commitment_number: u64) -> Result<TxCreationKeys, ChannelError> {
1155 let per_commitment_point = self.holder_signer.get_per_commitment_point(commitment_number, &self.secp_ctx);
1156 let delayed_payment_base = &self.get_holder_pubkeys().delayed_payment_basepoint;
1157 let htlc_basepoint = &self.get_holder_pubkeys().htlc_basepoint;
1158 let counterparty_pubkeys = self.get_counterparty_pubkeys();
1160 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()))
1164 /// Creates a set of keys for build_commitment_transaction to generate a transaction which we
1165 /// will sign and send to our counterparty.
1166 /// If an Err is returned, it is a ChannelError::Close (for get_outbound_funding_created)
1167 fn build_remote_transaction_keys(&self) -> Result<TxCreationKeys, ChannelError> {
1168 //TODO: Ensure that the payment_key derived here ends up in the library users' wallet as we
1169 //may see payments to it!
1170 let revocation_basepoint = &self.get_holder_pubkeys().revocation_basepoint;
1171 let htlc_basepoint = &self.get_holder_pubkeys().htlc_basepoint;
1172 let counterparty_pubkeys = self.get_counterparty_pubkeys();
1174 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()))
1177 /// Gets the redeemscript for the funding transaction output (ie the funding transaction output
1178 /// pays to get_funding_redeemscript().to_v0_p2wsh()).
1179 /// Panics if called before accept_channel/new_from_req
1180 pub fn get_funding_redeemscript(&self) -> Script {
1181 make_funding_redeemscript(&self.get_holder_pubkeys().funding_pubkey, self.counterparty_funding_pubkey())
1184 /// Builds the htlc-success or htlc-timeout transaction which spends a given HTLC output
1185 /// @local is used only to convert relevant internal structures which refer to remote vs local
1186 /// to decide value of outputs and direction of HTLCs.
1187 fn build_htlc_transaction(&self, prev_hash: &Txid, htlc: &HTLCOutputInCommitment, local: bool, keys: &TxCreationKeys, feerate_per_kw: u32) -> Transaction {
1188 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)
1191 /// Per HTLC, only one get_update_fail_htlc or get_update_fulfill_htlc call may be made.
1192 /// In such cases we debug_assert!(false) and return a ChannelError::Ignore. Thus, will always
1193 /// return Ok(_) if debug assertions are turned on or preconditions are met.
1195 /// Note that it is still possible to hit these assertions in case we find a preimage on-chain
1196 /// but then have a reorg which settles on an HTLC-failure on chain.
1197 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 {
1198 // Either ChannelFunded got set (which means it won't be unset) or there is no way any
1199 // caller thought we could have something claimed (cause we wouldn't have accepted in an
1200 // incoming HTLC anyway). If we got to ShutdownComplete, callers aren't allowed to call us,
1202 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
1203 panic!("Was asked to fulfill an HTLC when channel was not in an operational state");
1205 assert_eq!(self.channel_state & ChannelState::ShutdownComplete as u32, 0);
1207 let payment_hash_calc = PaymentHash(Sha256::hash(&payment_preimage_arg.0[..]).into_inner());
1209 // ChannelManager may generate duplicate claims/fails due to HTLC update events from
1210 // on-chain ChannelsMonitors during block rescan. Ideally we'd figure out a way to drop
1211 // these, but for now we just have to treat them as normal.
1213 let mut pending_idx = std::usize::MAX;
1214 for (idx, htlc) in self.pending_inbound_htlcs.iter().enumerate() {
1215 if htlc.htlc_id == htlc_id_arg {
1216 assert_eq!(htlc.payment_hash, payment_hash_calc);
1218 InboundHTLCState::Committed => {},
1219 InboundHTLCState::LocalRemoved(ref reason) => {
1220 if let &InboundHTLCRemovalReason::Fulfill(_) = reason {
1222 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()));
1224 debug_assert!(false, "Tried to fulfill an HTLC that was already fail/fulfilled");
1225 return Ok((None, None));
1228 debug_assert!(false, "Have an inbound HTLC we tried to claim before it was fully committed to");
1229 // Don't return in release mode here so that we can update channel_monitor
1236 if pending_idx == std::usize::MAX {
1237 return Err(ChannelError::Ignore("Unable to find a pending HTLC which matched the given HTLC ID".to_owned()));
1240 // Now update local state:
1242 // We have to put the payment_preimage in the channel_monitor right away here to ensure we
1243 // can claim it even if the channel hits the chain before we see their next commitment.
1244 self.latest_monitor_update_id += 1;
1245 let monitor_update = ChannelMonitorUpdate {
1246 update_id: self.latest_monitor_update_id,
1247 updates: vec![ChannelMonitorUpdateStep::PaymentPreimage {
1248 payment_preimage: payment_preimage_arg.clone(),
1252 if (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32 | ChannelState::PeerDisconnected as u32 | ChannelState::MonitorUpdateFailed as u32)) != 0 {
1253 for pending_update in self.holding_cell_htlc_updates.iter() {
1254 match pending_update {
1255 &HTLCUpdateAwaitingACK::ClaimHTLC { htlc_id, .. } => {
1256 if htlc_id_arg == htlc_id {
1257 // Make sure we don't leave latest_monitor_update_id incremented here:
1258 self.latest_monitor_update_id -= 1;
1259 debug_assert!(false, "Tried to fulfill an HTLC that was already fulfilled");
1260 return Ok((None, None));
1263 &HTLCUpdateAwaitingACK::FailHTLC { htlc_id, .. } => {
1264 if htlc_id_arg == htlc_id {
1265 log_warn!(logger, "Have preimage and want to fulfill HTLC with pending failure against channel {}", log_bytes!(self.channel_id()));
1266 // TODO: We may actually be able to switch to a fulfill here, though its
1267 // rare enough it may not be worth the complexity burden.
1268 debug_assert!(false, "Tried to fulfill an HTLC that was already failed");
1269 return Ok((None, Some(monitor_update)));
1275 log_trace!(logger, "Adding HTLC claim to holding_cell! Current state: {}", self.channel_state);
1276 self.holding_cell_htlc_updates.push(HTLCUpdateAwaitingACK::ClaimHTLC {
1277 payment_preimage: payment_preimage_arg, htlc_id: htlc_id_arg,
1279 return Ok((None, Some(monitor_update)));
1283 let htlc = &mut self.pending_inbound_htlcs[pending_idx];
1284 if let InboundHTLCState::Committed = htlc.state {
1286 debug_assert!(false, "Have an inbound HTLC we tried to claim before it was fully committed to");
1287 return Ok((None, Some(monitor_update)));
1289 log_trace!(logger, "Upgrading HTLC {} to LocalRemoved with a Fulfill!", log_bytes!(htlc.payment_hash.0));
1290 htlc.state = InboundHTLCState::LocalRemoved(InboundHTLCRemovalReason::Fulfill(payment_preimage_arg.clone()));
1293 Ok((Some(msgs::UpdateFulfillHTLC {
1294 channel_id: self.channel_id(),
1295 htlc_id: htlc_id_arg,
1296 payment_preimage: payment_preimage_arg,
1297 }), Some(monitor_update)))
1300 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 {
1301 match self.get_update_fulfill_htlc(htlc_id, payment_preimage, logger)? {
1302 (Some(update_fulfill_htlc), Some(mut monitor_update)) => {
1303 let (commitment, mut additional_update) = self.send_commitment_no_status_check(logger)?;
1304 // send_commitment_no_status_check may bump latest_monitor_id but we want them to be
1305 // strictly increasing by one, so decrement it here.
1306 self.latest_monitor_update_id = monitor_update.update_id;
1307 monitor_update.updates.append(&mut additional_update.updates);
1308 Ok((Some((update_fulfill_htlc, commitment)), Some(monitor_update)))
1310 (Some(update_fulfill_htlc), None) => {
1311 let (commitment, monitor_update) = self.send_commitment_no_status_check(logger)?;
1312 Ok((Some((update_fulfill_htlc, commitment)), Some(monitor_update)))
1314 (None, Some(monitor_update)) => Ok((None, Some(monitor_update))),
1315 (None, None) => Ok((None, None))
1319 /// Per HTLC, only one get_update_fail_htlc or get_update_fulfill_htlc call may be made.
1320 /// In such cases we debug_assert!(false) and return a ChannelError::Ignore. Thus, will always
1321 /// return Ok(_) if debug assertions are turned on or preconditions are met.
1323 /// Note that it is still possible to hit these assertions in case we find a preimage on-chain
1324 /// but then have a reorg which settles on an HTLC-failure on chain.
1325 pub fn get_update_fail_htlc(&mut self, htlc_id_arg: u64, err_packet: msgs::OnionErrorPacket) -> Result<Option<msgs::UpdateFailHTLC>, ChannelError> {
1326 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
1327 panic!("Was asked to fail an HTLC when channel was not in an operational state");
1329 assert_eq!(self.channel_state & ChannelState::ShutdownComplete as u32, 0);
1331 // ChannelManager may generate duplicate claims/fails due to HTLC update events from
1332 // on-chain ChannelsMonitors during block rescan. Ideally we'd figure out a way to drop
1333 // these, but for now we just have to treat them as normal.
1335 let mut pending_idx = std::usize::MAX;
1336 for (idx, htlc) in self.pending_inbound_htlcs.iter().enumerate() {
1337 if htlc.htlc_id == htlc_id_arg {
1339 InboundHTLCState::Committed => {},
1340 InboundHTLCState::LocalRemoved(_) => {
1341 debug_assert!(false, "Tried to fail an HTLC that was already fail/fulfilled");
1345 debug_assert!(false, "Have an inbound HTLC we tried to claim before it was fully committed to");
1346 return Err(ChannelError::Ignore(format!("Unable to find a pending HTLC which matched the given HTLC ID ({})", htlc.htlc_id)));
1352 if pending_idx == std::usize::MAX {
1353 return Err(ChannelError::Ignore("Unable to find a pending HTLC which matched the given HTLC ID".to_owned()));
1356 // Now update local state:
1357 if (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32 | ChannelState::PeerDisconnected as u32 | ChannelState::MonitorUpdateFailed as u32)) != 0 {
1358 for pending_update in self.holding_cell_htlc_updates.iter() {
1359 match pending_update {
1360 &HTLCUpdateAwaitingACK::ClaimHTLC { htlc_id, .. } => {
1361 if htlc_id_arg == htlc_id {
1362 debug_assert!(false, "Tried to fail an HTLC that was already fulfilled");
1363 return Err(ChannelError::Ignore("Unable to find a pending HTLC which matched the given HTLC ID".to_owned()));
1366 &HTLCUpdateAwaitingACK::FailHTLC { htlc_id, .. } => {
1367 if htlc_id_arg == htlc_id {
1368 debug_assert!(false, "Tried to fail an HTLC that was already failed");
1369 return Err(ChannelError::Ignore("Unable to find a pending HTLC which matched the given HTLC ID".to_owned()));
1375 self.holding_cell_htlc_updates.push(HTLCUpdateAwaitingACK::FailHTLC {
1376 htlc_id: htlc_id_arg,
1383 let htlc = &mut self.pending_inbound_htlcs[pending_idx];
1384 htlc.state = InboundHTLCState::LocalRemoved(InboundHTLCRemovalReason::FailRelay(err_packet.clone()));
1387 Ok(Some(msgs::UpdateFailHTLC {
1388 channel_id: self.channel_id(),
1389 htlc_id: htlc_id_arg,
1394 // Message handlers:
1396 pub fn accept_channel(&mut self, msg: &msgs::AcceptChannel, config: &UserConfig, their_features: InitFeatures) -> Result<(), ChannelError> {
1397 // Check sanity of message fields:
1398 if !self.is_outbound() {
1399 return Err(ChannelError::Close("Got an accept_channel message from an inbound peer".to_owned()));
1401 if self.channel_state != ChannelState::OurInitSent as u32 {
1402 return Err(ChannelError::Close("Got an accept_channel message at a strange time".to_owned()));
1404 if msg.dust_limit_satoshis > 21000000 * 100000000 {
1405 return Err(ChannelError::Close(format!("Peer never wants payout outputs? dust_limit_satoshis was {}", msg.dust_limit_satoshis)));
1407 if msg.channel_reserve_satoshis > self.channel_value_satoshis {
1408 return Err(ChannelError::Close(format!("Bogus channel_reserve_satoshis ({}). Must not be greater than ({})", msg.channel_reserve_satoshis, self.channel_value_satoshis)));
1410 if msg.dust_limit_satoshis > msg.channel_reserve_satoshis {
1411 return Err(ChannelError::Close(format!("Bogus channel_reserve ({}) and dust_limit ({})", msg.channel_reserve_satoshis, msg.dust_limit_satoshis)));
1413 if msg.channel_reserve_satoshis < self.holder_dust_limit_satoshis {
1414 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)));
1416 let remote_reserve = Channel::<Signer>::get_holder_selected_channel_reserve_satoshis(self.channel_value_satoshis);
1417 if msg.dust_limit_satoshis > remote_reserve {
1418 return Err(ChannelError::Close(format!("Dust limit ({}) is bigger than our channel reserve ({})", msg.dust_limit_satoshis, remote_reserve)));
1420 let full_channel_value_msat = (self.channel_value_satoshis - msg.channel_reserve_satoshis) * 1000;
1421 if msg.htlc_minimum_msat >= full_channel_value_msat {
1422 return Err(ChannelError::Close(format!("Minimum htlc value ({}) is full channel value ({})", msg.htlc_minimum_msat, full_channel_value_msat)));
1424 let max_delay_acceptable = u16::min(config.peer_channel_config_limits.their_to_self_delay, MAX_LOCAL_BREAKDOWN_TIMEOUT);
1425 if msg.to_self_delay > max_delay_acceptable {
1426 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)));
1428 if msg.max_accepted_htlcs < 1 {
1429 return Err(ChannelError::Close("0 max_accepted_htlcs makes for a useless channel".to_owned()));
1431 if msg.max_accepted_htlcs > MAX_HTLCS {
1432 return Err(ChannelError::Close(format!("max_accepted_htlcs was {}. It must not be larger than {}", msg.max_accepted_htlcs, MAX_HTLCS)));
1435 // Now check against optional parameters as set by config...
1436 if msg.htlc_minimum_msat > config.peer_channel_config_limits.max_htlc_minimum_msat {
1437 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)));
1439 if msg.max_htlc_value_in_flight_msat < config.peer_channel_config_limits.min_max_htlc_value_in_flight_msat {
1440 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)));
1442 if msg.channel_reserve_satoshis > config.peer_channel_config_limits.max_channel_reserve_satoshis {
1443 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)));
1445 if msg.max_accepted_htlcs < config.peer_channel_config_limits.min_max_accepted_htlcs {
1446 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)));
1448 if msg.dust_limit_satoshis < config.peer_channel_config_limits.min_dust_limit_satoshis {
1449 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)));
1451 if msg.dust_limit_satoshis > config.peer_channel_config_limits.max_dust_limit_satoshis {
1452 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)));
1454 if msg.minimum_depth > config.peer_channel_config_limits.max_minimum_depth {
1455 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)));
1458 let counterparty_shutdown_scriptpubkey = if their_features.supports_upfront_shutdown_script() {
1459 match &msg.shutdown_scriptpubkey {
1460 &OptionalField::Present(ref script) => {
1461 // Peer is signaling upfront_shutdown and has opt-out with a 0-length script. We don't enforce anything
1462 if script.len() == 0 {
1464 // Peer is signaling upfront_shutdown and has provided a non-accepted scriptpubkey format. Fail the channel
1465 } else if is_unsupported_shutdown_script(&their_features, script) {
1466 return Err(ChannelError::Close(format!("Peer is signaling upfront_shutdown but has provided a non-accepted scriptpubkey format. script: ({})", script.to_bytes().to_hex())));
1468 Some(script.clone())
1471 // 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
1472 &OptionalField::Absent => {
1473 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()));
1478 self.counterparty_dust_limit_satoshis = msg.dust_limit_satoshis;
1479 self.counterparty_max_htlc_value_in_flight_msat = cmp::min(msg.max_htlc_value_in_flight_msat, self.channel_value_satoshis * 1000);
1480 self.counterparty_selected_channel_reserve_satoshis = msg.channel_reserve_satoshis;
1481 self.counterparty_htlc_minimum_msat = msg.htlc_minimum_msat;
1482 self.counterparty_max_accepted_htlcs = msg.max_accepted_htlcs;
1483 self.minimum_depth = msg.minimum_depth;
1485 let counterparty_pubkeys = ChannelPublicKeys {
1486 funding_pubkey: msg.funding_pubkey,
1487 revocation_basepoint: msg.revocation_basepoint,
1488 payment_point: msg.payment_point,
1489 delayed_payment_basepoint: msg.delayed_payment_basepoint,
1490 htlc_basepoint: msg.htlc_basepoint
1493 self.channel_transaction_parameters.counterparty_parameters = Some(CounterpartyChannelTransactionParameters {
1494 selected_contest_delay: msg.to_self_delay,
1495 pubkeys: counterparty_pubkeys,
1498 self.counterparty_cur_commitment_point = Some(msg.first_per_commitment_point);
1499 self.counterparty_shutdown_scriptpubkey = counterparty_shutdown_scriptpubkey;
1501 self.channel_state = ChannelState::OurInitSent as u32 | ChannelState::TheirInitSent as u32;
1506 fn funding_created_signature<L: Deref>(&mut self, sig: &Signature, logger: &L) -> Result<(Txid, CommitmentTransaction, Signature), ChannelError> where L::Target: Logger {
1507 let funding_script = self.get_funding_redeemscript();
1509 let keys = self.build_holder_transaction_keys(self.cur_holder_commitment_transaction_number)?;
1510 let initial_commitment_tx = self.build_commitment_transaction(self.cur_holder_commitment_transaction_number, &keys, true, false, self.feerate_per_kw, logger).0;
1512 let trusted_tx = initial_commitment_tx.trust();
1513 let initial_commitment_bitcoin_tx = trusted_tx.built_transaction();
1514 let sighash = initial_commitment_bitcoin_tx.get_sighash_all(&funding_script, self.channel_value_satoshis);
1515 // They sign the holder commitment transaction...
1516 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));
1517 secp_check!(self.secp_ctx.verify(&sighash, &sig, self.counterparty_funding_pubkey()), "Invalid funding_created signature from peer".to_owned());
1520 let counterparty_keys = self.build_remote_transaction_keys()?;
1521 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;
1523 let counterparty_trusted_tx = counterparty_initial_commitment_tx.trust();
1524 let counterparty_initial_bitcoin_tx = counterparty_trusted_tx.built_transaction();
1525 log_trace!(logger, "Initial counterparty ID {} tx {}", counterparty_initial_bitcoin_tx.txid, encode::serialize_hex(&counterparty_initial_bitcoin_tx.transaction));
1527 let counterparty_signature = self.holder_signer.sign_counterparty_commitment(&counterparty_initial_commitment_tx, &self.secp_ctx)
1528 .map_err(|_| ChannelError::Close("Failed to get signatures for new commitment_signed".to_owned()))?.0;
1530 // We sign "counterparty" commitment transaction, allowing them to broadcast the tx if they wish.
1531 Ok((counterparty_initial_bitcoin_tx.txid, initial_commitment_tx, counterparty_signature))
1534 fn counterparty_funding_pubkey(&self) -> &PublicKey {
1535 &self.get_counterparty_pubkeys().funding_pubkey
1538 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 {
1539 if self.is_outbound() {
1540 return Err(ChannelError::Close("Received funding_created for an outbound channel?".to_owned()));
1542 if self.channel_state != (ChannelState::OurInitSent as u32 | ChannelState::TheirInitSent as u32) {
1543 // BOLT 2 says that if we disconnect before we send funding_signed we SHOULD NOT
1544 // remember the channel, so it's safe to just send an error_message here and drop the
1546 return Err(ChannelError::Close("Received funding_created after we got the channel!".to_owned()));
1548 if self.commitment_secrets.get_min_seen_secret() != (1 << 48) ||
1549 self.cur_counterparty_commitment_transaction_number != INITIAL_COMMITMENT_NUMBER ||
1550 self.cur_holder_commitment_transaction_number != INITIAL_COMMITMENT_NUMBER {
1551 panic!("Should not have advanced channel commitment tx numbers prior to funding_created");
1554 let funding_txo = OutPoint { txid: msg.funding_txid, index: msg.funding_output_index };
1555 self.channel_transaction_parameters.funding_outpoint = Some(funding_txo);
1556 // This is an externally observable change before we finish all our checks. In particular
1557 // funding_created_signature may fail.
1558 self.holder_signer.ready_channel(&self.channel_transaction_parameters);
1560 let (counterparty_initial_commitment_txid, initial_commitment_tx, signature) = match self.funding_created_signature(&msg.signature, logger) {
1562 Err(ChannelError::Close(e)) => {
1563 self.channel_transaction_parameters.funding_outpoint = None;
1564 return Err(ChannelError::Close(e));
1567 // The only error we know how to handle is ChannelError::Close, so we fall over here
1568 // to make sure we don't continue with an inconsistent state.
1569 panic!("unexpected error type from funding_created_signature {:?}", e);
1573 let holder_commitment_tx = HolderCommitmentTransaction::new(
1574 initial_commitment_tx,
1577 &self.get_holder_pubkeys().funding_pubkey,
1578 self.counterparty_funding_pubkey()
1581 // Now that we're past error-generating stuff, update our local state:
1583 let funding_redeemscript = self.get_funding_redeemscript();
1584 let funding_txo_script = funding_redeemscript.to_v0_p2wsh();
1585 let obscure_factor = get_commitment_transaction_number_obscure_factor(&self.get_holder_pubkeys().payment_point, &self.get_counterparty_pubkeys().payment_point, self.is_outbound());
1586 let channel_monitor = ChannelMonitor::new(self.secp_ctx.clone(), self.holder_signer.clone(),
1587 &self.shutdown_pubkey, self.get_holder_selected_contest_delay(),
1588 &self.destination_script, (funding_txo, funding_txo_script.clone()),
1589 &self.channel_transaction_parameters,
1590 funding_redeemscript.clone(), self.channel_value_satoshis,
1592 holder_commitment_tx, last_block_hash);
1594 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);
1596 self.channel_state = ChannelState::FundingSent as u32;
1597 self.channel_id = funding_txo.to_channel_id();
1598 self.cur_counterparty_commitment_transaction_number -= 1;
1599 self.cur_holder_commitment_transaction_number -= 1;
1601 Ok((msgs::FundingSigned {
1602 channel_id: self.channel_id,
1604 }, channel_monitor))
1607 /// Handles a funding_signed message from the remote end.
1608 /// If this call is successful, broadcast the funding transaction (and not before!)
1609 pub fn funding_signed<L: Deref>(&mut self, msg: &msgs::FundingSigned, last_block_hash: BlockHash, logger: &L) -> Result<ChannelMonitor<Signer>, ChannelError> where L::Target: Logger {
1610 if !self.is_outbound() {
1611 return Err(ChannelError::Close("Received funding_signed for an inbound channel?".to_owned()));
1613 if self.channel_state & !(ChannelState::MonitorUpdateFailed as u32) != ChannelState::FundingCreated as u32 {
1614 return Err(ChannelError::Close("Received funding_signed in strange state!".to_owned()));
1616 if self.commitment_secrets.get_min_seen_secret() != (1 << 48) ||
1617 self.cur_counterparty_commitment_transaction_number != INITIAL_COMMITMENT_NUMBER ||
1618 self.cur_holder_commitment_transaction_number != INITIAL_COMMITMENT_NUMBER {
1619 panic!("Should not have advanced channel commitment tx numbers prior to funding_created");
1622 let funding_script = self.get_funding_redeemscript();
1624 let counterparty_keys = self.build_remote_transaction_keys()?;
1625 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;
1626 let counterparty_trusted_tx = counterparty_initial_commitment_tx.trust();
1627 let counterparty_initial_bitcoin_tx = counterparty_trusted_tx.built_transaction();
1629 log_trace!(logger, "Initial counterparty ID {} tx {}", counterparty_initial_bitcoin_tx.txid, encode::serialize_hex(&counterparty_initial_bitcoin_tx.transaction));
1631 let holder_signer = self.build_holder_transaction_keys(self.cur_holder_commitment_transaction_number)?;
1632 let initial_commitment_tx = self.build_commitment_transaction(self.cur_holder_commitment_transaction_number, &holder_signer, true, false, self.feerate_per_kw, logger).0;
1634 let trusted_tx = initial_commitment_tx.trust();
1635 let initial_commitment_bitcoin_tx = trusted_tx.built_transaction();
1636 let sighash = initial_commitment_bitcoin_tx.get_sighash_all(&funding_script, self.channel_value_satoshis);
1637 // They sign our commitment transaction, allowing us to broadcast the tx if we wish.
1638 if let Err(_) = self.secp_ctx.verify(&sighash, &msg.signature, &self.get_counterparty_pubkeys().funding_pubkey) {
1639 return Err(ChannelError::Close("Invalid funding_signed signature from peer".to_owned()));
1643 let holder_commitment_tx = HolderCommitmentTransaction::new(
1644 initial_commitment_tx,
1647 &self.get_holder_pubkeys().funding_pubkey,
1648 self.counterparty_funding_pubkey()
1652 let funding_redeemscript = self.get_funding_redeemscript();
1653 let funding_txo = self.get_funding_txo().unwrap();
1654 let funding_txo_script = funding_redeemscript.to_v0_p2wsh();
1655 let obscure_factor = get_commitment_transaction_number_obscure_factor(&self.get_holder_pubkeys().payment_point, &self.get_counterparty_pubkeys().payment_point, self.is_outbound());
1656 let channel_monitor = ChannelMonitor::new(self.secp_ctx.clone(), self.holder_signer.clone(),
1657 &self.shutdown_pubkey, self.get_holder_selected_contest_delay(),
1658 &self.destination_script, (funding_txo, funding_txo_script),
1659 &self.channel_transaction_parameters,
1660 funding_redeemscript.clone(), self.channel_value_satoshis,
1662 holder_commitment_tx, last_block_hash);
1664 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);
1666 assert_eq!(self.channel_state & (ChannelState::MonitorUpdateFailed as u32), 0); // We have no had any monitor(s) yet to fail update!
1667 self.channel_state = ChannelState::FundingSent as u32;
1668 self.cur_holder_commitment_transaction_number -= 1;
1669 self.cur_counterparty_commitment_transaction_number -= 1;
1674 pub fn funding_locked(&mut self, msg: &msgs::FundingLocked) -> Result<(), ChannelError> {
1675 if self.channel_state & (ChannelState::PeerDisconnected as u32) == ChannelState::PeerDisconnected as u32 {
1676 return Err(ChannelError::Close("Peer sent funding_locked when we needed a channel_reestablish".to_owned()));
1679 let non_shutdown_state = self.channel_state & (!MULTI_STATE_FLAGS);
1681 if non_shutdown_state == ChannelState::FundingSent as u32 {
1682 self.channel_state |= ChannelState::TheirFundingLocked as u32;
1683 } else if non_shutdown_state == (ChannelState::FundingSent as u32 | ChannelState::OurFundingLocked as u32) {
1684 self.channel_state = ChannelState::ChannelFunded as u32 | (self.channel_state & MULTI_STATE_FLAGS);
1685 self.update_time_counter += 1;
1686 } else if (self.channel_state & (ChannelState::ChannelFunded as u32) != 0 &&
1687 // Note that funding_signed/funding_created will have decremented both by 1!
1688 self.cur_holder_commitment_transaction_number == INITIAL_COMMITMENT_NUMBER - 1 &&
1689 self.cur_counterparty_commitment_transaction_number == INITIAL_COMMITMENT_NUMBER - 1) ||
1690 // If we reconnected before sending our funding locked they may still resend theirs:
1691 (self.channel_state & (ChannelState::FundingSent as u32 | ChannelState::TheirFundingLocked as u32) ==
1692 (ChannelState::FundingSent as u32 | ChannelState::TheirFundingLocked as u32)) {
1693 if self.counterparty_cur_commitment_point != Some(msg.next_per_commitment_point) {
1694 return Err(ChannelError::Close("Peer sent a reconnect funding_locked with a different point".to_owned()));
1696 // They probably disconnected/reconnected and re-sent the funding_locked, which is required
1699 return Err(ChannelError::Close("Peer sent a funding_locked at a strange time".to_owned()));
1702 self.counterparty_prev_commitment_point = self.counterparty_cur_commitment_point;
1703 self.counterparty_cur_commitment_point = Some(msg.next_per_commitment_point);
1707 /// Returns (inbound_htlc_count, htlc_inbound_value_msat)
1708 fn get_inbound_pending_htlc_stats(&self) -> (u32, u64) {
1709 let mut htlc_inbound_value_msat = 0;
1710 for ref htlc in self.pending_inbound_htlcs.iter() {
1711 htlc_inbound_value_msat += htlc.amount_msat;
1713 (self.pending_inbound_htlcs.len() as u32, htlc_inbound_value_msat)
1716 /// Returns (outbound_htlc_count, htlc_outbound_value_msat) *including* pending adds in our
1718 fn get_outbound_pending_htlc_stats(&self) -> (u32, u64) {
1719 let mut htlc_outbound_value_msat = 0;
1720 for ref htlc in self.pending_outbound_htlcs.iter() {
1721 htlc_outbound_value_msat += htlc.amount_msat;
1724 let mut htlc_outbound_count = self.pending_outbound_htlcs.len();
1725 for update in self.holding_cell_htlc_updates.iter() {
1726 if let &HTLCUpdateAwaitingACK::AddHTLC { ref amount_msat, .. } = update {
1727 htlc_outbound_count += 1;
1728 htlc_outbound_value_msat += amount_msat;
1732 (htlc_outbound_count as u32, htlc_outbound_value_msat)
1735 /// Get the available (ie not including pending HTLCs) inbound and outbound balance in msat.
1736 /// Doesn't bother handling the
1737 /// if-we-removed-it-already-but-haven't-fully-resolved-they-can-still-send-an-inbound-HTLC
1738 /// corner case properly.
1739 pub fn get_inbound_outbound_available_balance_msat(&self) -> (u64, u64) {
1740 // Note that we have to handle overflow due to the above case.
1741 (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,
1742 cmp::max(self.value_to_self_msat as i64 - self.get_outbound_pending_htlc_stats().1 as i64, 0) as u64)
1745 // Get the fee cost of a commitment tx with a given number of HTLC outputs.
1746 // Note that num_htlcs should not include dust HTLCs.
1747 fn commit_tx_fee_msat(&self, num_htlcs: usize) -> u64 {
1748 // Note that we need to divide before multiplying to round properly,
1749 // since the lowest denomination of bitcoin on-chain is the satoshi.
1750 (COMMITMENT_TX_BASE_WEIGHT + num_htlcs as u64 * COMMITMENT_TX_WEIGHT_PER_HTLC) * self.feerate_per_kw as u64 / 1000 * 1000
1753 // Get the commitment tx fee for the local's (i.e. our) next commitment transaction based on the
1754 // number of pending HTLCs that are on track to be in our next commitment tx, plus an additional
1755 // HTLC if `fee_spike_buffer_htlc` is Some, plus a new HTLC given by `new_htlc_amount`. Dust HTLCs
1757 fn next_local_commit_tx_fee_msat(&self, htlc: HTLCCandidate, fee_spike_buffer_htlc: Option<()>) -> u64 {
1758 assert!(self.is_outbound());
1760 let real_dust_limit_success_sat = (self.feerate_per_kw as u64 * HTLC_SUCCESS_TX_WEIGHT / 1000) + self.holder_dust_limit_satoshis;
1761 let real_dust_limit_timeout_sat = (self.feerate_per_kw as u64 * HTLC_TIMEOUT_TX_WEIGHT / 1000) + self.holder_dust_limit_satoshis;
1763 let mut addl_htlcs = 0;
1764 if fee_spike_buffer_htlc.is_some() { addl_htlcs += 1; }
1766 HTLCInitiator::LocalOffered => {
1767 if htlc.amount_msat / 1000 >= real_dust_limit_timeout_sat {
1771 HTLCInitiator::RemoteOffered => {
1772 if htlc.amount_msat / 1000 >= real_dust_limit_success_sat {
1778 let mut included_htlcs = 0;
1779 for ref htlc in self.pending_inbound_htlcs.iter() {
1780 if htlc.amount_msat / 1000 < real_dust_limit_success_sat {
1783 // We include LocalRemoved HTLCs here because we may still need to broadcast a commitment
1784 // transaction including this HTLC if it times out before they RAA.
1785 included_htlcs += 1;
1788 for ref htlc in self.pending_outbound_htlcs.iter() {
1789 if htlc.amount_msat / 1000 < real_dust_limit_timeout_sat {
1793 OutboundHTLCState::LocalAnnounced {..} => included_htlcs += 1,
1794 OutboundHTLCState::Committed => included_htlcs += 1,
1795 OutboundHTLCState::RemoteRemoved {..} => included_htlcs += 1,
1796 // We don't include AwaitingRemoteRevokeToRemove HTLCs because our next commitment
1797 // transaction won't be generated until they send us their next RAA, which will mean
1798 // dropping any HTLCs in this state.
1803 for htlc in self.holding_cell_htlc_updates.iter() {
1805 &HTLCUpdateAwaitingACK::AddHTLC { amount_msat, .. } => {
1806 if amount_msat / 1000 < real_dust_limit_timeout_sat {
1811 _ => {}, // Don't include claims/fails that are awaiting ack, because once we get the
1812 // ack we're guaranteed to never include them in commitment txs anymore.
1816 let num_htlcs = included_htlcs + addl_htlcs;
1817 let res = self.commit_tx_fee_msat(num_htlcs);
1818 #[cfg(any(test, feature = "fuzztarget"))]
1821 if fee_spike_buffer_htlc.is_some() {
1822 fee = self.commit_tx_fee_msat(num_htlcs - 1);
1824 let total_pending_htlcs = self.pending_inbound_htlcs.len() + self.pending_outbound_htlcs.len()
1825 + self.holding_cell_htlc_updates.len();
1826 let commitment_tx_info = CommitmentTxInfoCached {
1828 total_pending_htlcs,
1829 next_holder_htlc_id: match htlc.origin {
1830 HTLCInitiator::LocalOffered => self.next_holder_htlc_id + 1,
1831 HTLCInitiator::RemoteOffered => self.next_holder_htlc_id,
1833 next_counterparty_htlc_id: match htlc.origin {
1834 HTLCInitiator::LocalOffered => self.next_counterparty_htlc_id,
1835 HTLCInitiator::RemoteOffered => self.next_counterparty_htlc_id + 1,
1837 feerate: self.feerate_per_kw,
1839 *self.next_local_commitment_tx_fee_info_cached.lock().unwrap() = Some(commitment_tx_info);
1844 // Get the commitment tx fee for the remote's next commitment transaction based on the number of
1845 // pending HTLCs that are on track to be in their next commitment tx, plus an additional HTLC if
1846 // `fee_spike_buffer_htlc` is Some, plus a new HTLC given by `new_htlc_amount`. Dust HTLCs are
1848 fn next_remote_commit_tx_fee_msat(&self, htlc: HTLCCandidate, fee_spike_buffer_htlc: Option<()>) -> u64 {
1849 assert!(!self.is_outbound());
1851 let real_dust_limit_success_sat = (self.feerate_per_kw as u64 * HTLC_SUCCESS_TX_WEIGHT / 1000) + self.counterparty_dust_limit_satoshis;
1852 let real_dust_limit_timeout_sat = (self.feerate_per_kw as u64 * HTLC_TIMEOUT_TX_WEIGHT / 1000) + self.counterparty_dust_limit_satoshis;
1854 let mut addl_htlcs = 0;
1855 if fee_spike_buffer_htlc.is_some() { addl_htlcs += 1; }
1857 HTLCInitiator::LocalOffered => {
1858 if htlc.amount_msat / 1000 >= real_dust_limit_success_sat {
1862 HTLCInitiator::RemoteOffered => {
1863 if htlc.amount_msat / 1000 >= real_dust_limit_timeout_sat {
1869 // When calculating the set of HTLCs which will be included in their next commitment_signed, all
1870 // non-dust inbound HTLCs are included (as all states imply it will be included) and only
1871 // committed outbound HTLCs, see below.
1872 let mut included_htlcs = 0;
1873 for ref htlc in self.pending_inbound_htlcs.iter() {
1874 if htlc.amount_msat / 1000 <= real_dust_limit_timeout_sat {
1877 included_htlcs += 1;
1880 for ref htlc in self.pending_outbound_htlcs.iter() {
1881 if htlc.amount_msat / 1000 <= real_dust_limit_success_sat {
1884 // We only include outbound HTLCs if it will not be included in their next commitment_signed,
1885 // i.e. if they've responded to us with an RAA after announcement.
1887 OutboundHTLCState::Committed => included_htlcs += 1,
1888 OutboundHTLCState::RemoteRemoved {..} => included_htlcs += 1,
1889 OutboundHTLCState::LocalAnnounced { .. } => included_htlcs += 1,
1894 let num_htlcs = included_htlcs + addl_htlcs;
1895 let res = self.commit_tx_fee_msat(num_htlcs);
1896 #[cfg(any(test, feature = "fuzztarget"))]
1899 if fee_spike_buffer_htlc.is_some() {
1900 fee = self.commit_tx_fee_msat(num_htlcs - 1);
1902 let total_pending_htlcs = self.pending_inbound_htlcs.len() + self.pending_outbound_htlcs.len();
1903 let commitment_tx_info = CommitmentTxInfoCached {
1905 total_pending_htlcs,
1906 next_holder_htlc_id: match htlc.origin {
1907 HTLCInitiator::LocalOffered => self.next_holder_htlc_id + 1,
1908 HTLCInitiator::RemoteOffered => self.next_holder_htlc_id,
1910 next_counterparty_htlc_id: match htlc.origin {
1911 HTLCInitiator::LocalOffered => self.next_counterparty_htlc_id,
1912 HTLCInitiator::RemoteOffered => self.next_counterparty_htlc_id + 1,
1914 feerate: self.feerate_per_kw,
1916 *self.next_remote_commitment_tx_fee_info_cached.lock().unwrap() = Some(commitment_tx_info);
1921 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>
1922 where F: for<'a> Fn(&'a Self, PendingHTLCStatus, u16) -> PendingHTLCStatus, L::Target: Logger {
1923 // We can't accept HTLCs sent after we've sent a shutdown.
1924 let local_sent_shutdown = (self.channel_state & (ChannelState::ChannelFunded as u32 | ChannelState::LocalShutdownSent as u32)) != (ChannelState::ChannelFunded as u32);
1925 if local_sent_shutdown {
1926 pending_forward_status = create_pending_htlc_status(self, pending_forward_status, 0x1000|20);
1928 // If the remote has sent a shutdown prior to adding this HTLC, then they are in violation of the spec.
1929 let remote_sent_shutdown = (self.channel_state & (ChannelState::ChannelFunded as u32 | ChannelState::RemoteShutdownSent as u32)) != (ChannelState::ChannelFunded as u32);
1930 if remote_sent_shutdown {
1931 return Err(ChannelError::Close("Got add HTLC message when channel was not in an operational state".to_owned()));
1933 if self.channel_state & (ChannelState::PeerDisconnected as u32) == ChannelState::PeerDisconnected as u32 {
1934 return Err(ChannelError::Close("Peer sent update_add_htlc when we needed a channel_reestablish".to_owned()));
1936 if msg.amount_msat > self.channel_value_satoshis * 1000 {
1937 return Err(ChannelError::Close("Remote side tried to send more than the total value of the channel".to_owned()));
1939 if msg.amount_msat == 0 {
1940 return Err(ChannelError::Close("Remote side tried to send a 0-msat HTLC".to_owned()));
1942 if msg.amount_msat < self.holder_htlc_minimum_msat {
1943 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)));
1946 let (inbound_htlc_count, htlc_inbound_value_msat) = self.get_inbound_pending_htlc_stats();
1947 if inbound_htlc_count + 1 > OUR_MAX_HTLCS as u32 {
1948 return Err(ChannelError::Close(format!("Remote tried to push more than our max accepted HTLCs ({})", OUR_MAX_HTLCS)));
1950 let holder_max_htlc_value_in_flight_msat = Channel::<Signer>::get_holder_max_htlc_value_in_flight_msat(self.channel_value_satoshis);
1951 if htlc_inbound_value_msat + msg.amount_msat > holder_max_htlc_value_in_flight_msat {
1952 return Err(ChannelError::Close(format!("Remote HTLC add would put them over our max HTLC value ({})", holder_max_htlc_value_in_flight_msat)));
1954 // Check holder_selected_channel_reserve_satoshis (we're getting paid, so they have to at least meet
1955 // the reserve_satoshis we told them to always have as direct payment so that they lose
1956 // something if we punish them for broadcasting an old state).
1957 // Note that we don't really care about having a small/no to_remote output in our local
1958 // commitment transactions, as the purpose of the channel reserve is to ensure we can
1959 // punish *them* if they misbehave, so we discount any outbound HTLCs which will not be
1960 // present in the next commitment transaction we send them (at least for fulfilled ones,
1961 // failed ones won't modify value_to_self).
1962 // Note that we will send HTLCs which another instance of rust-lightning would think
1963 // violate the reserve value if we do not do this (as we forget inbound HTLCs from the
1964 // Channel state once they will not be present in the next received commitment
1966 let mut removed_outbound_total_msat = 0;
1967 for ref htlc in self.pending_outbound_htlcs.iter() {
1968 if let OutboundHTLCState::AwaitingRemoteRevokeToRemove(None) = htlc.state {
1969 removed_outbound_total_msat += htlc.amount_msat;
1970 } else if let OutboundHTLCState::AwaitingRemovedRemoteRevoke(None) = htlc.state {
1971 removed_outbound_total_msat += htlc.amount_msat;
1975 let pending_value_to_self_msat =
1976 self.value_to_self_msat + htlc_inbound_value_msat - removed_outbound_total_msat;
1977 let pending_remote_value_msat =
1978 self.channel_value_satoshis * 1000 - pending_value_to_self_msat;
1979 if pending_remote_value_msat < msg.amount_msat {
1980 return Err(ChannelError::Close("Remote HTLC add would overdraw remaining funds".to_owned()));
1983 // Check that the remote can afford to pay for this HTLC on-chain at the current
1984 // feerate_per_kw, while maintaining their channel reserve (as required by the spec).
1985 let remote_commit_tx_fee_msat = if self.is_outbound() { 0 } else {
1986 let htlc_candidate = HTLCCandidate::new(msg.amount_msat, HTLCInitiator::RemoteOffered);
1987 self.next_remote_commit_tx_fee_msat(htlc_candidate, None) // Don't include the extra fee spike buffer HTLC in calculations
1989 if pending_remote_value_msat - msg.amount_msat < remote_commit_tx_fee_msat {
1990 return Err(ChannelError::Close("Remote HTLC add would not leave enough to pay for fees".to_owned()));
1993 let chan_reserve_msat =
1994 Channel::<Signer>::get_holder_selected_channel_reserve_satoshis(self.channel_value_satoshis) * 1000;
1995 if pending_remote_value_msat - msg.amount_msat - remote_commit_tx_fee_msat < chan_reserve_msat {
1996 return Err(ChannelError::Close("Remote HTLC add would put them under remote reserve value".to_owned()));
1999 if !self.is_outbound() {
2000 // `2 *` and `Some(())` is for the fee spike buffer we keep for the remote. This deviates from
2001 // the spec because in the spec, the fee spike buffer requirement doesn't exist on the
2002 // receiver's side, only on the sender's.
2003 // Note that when we eventually remove support for fee updates and switch to anchor output
2004 // fees, we will drop the `2 *`, since we no longer be as sensitive to fee spikes. But, keep
2005 // the extra htlc when calculating the next remote commitment transaction fee as we should
2006 // still be able to afford adding this HTLC plus one more future HTLC, regardless of being
2007 // sensitive to fee spikes.
2008 let htlc_candidate = HTLCCandidate::new(msg.amount_msat, HTLCInitiator::RemoteOffered);
2009 let remote_fee_cost_incl_stuck_buffer_msat = 2 * self.next_remote_commit_tx_fee_msat(htlc_candidate, Some(()));
2010 if pending_remote_value_msat - msg.amount_msat - chan_reserve_msat < remote_fee_cost_incl_stuck_buffer_msat {
2011 // Note that if the pending_forward_status is not updated here, then it's because we're already failing
2012 // the HTLC, i.e. its status is already set to failing.
2013 log_info!(logger, "Attempting to fail HTLC due to fee spike buffer violation");
2014 pending_forward_status = create_pending_htlc_status(self, pending_forward_status, 0x1000|7);
2017 // Check that they won't violate our local required channel reserve by adding this HTLC.
2018 let htlc_candidate = HTLCCandidate::new(msg.amount_msat, HTLCInitiator::RemoteOffered);
2019 let local_commit_tx_fee_msat = self.next_local_commit_tx_fee_msat(htlc_candidate, None);
2020 if self.value_to_self_msat < self.counterparty_selected_channel_reserve_satoshis * 1000 + local_commit_tx_fee_msat {
2021 return Err(ChannelError::Close("Cannot accept HTLC that would put our balance under counterparty-announced channel reserve value".to_owned()));
2024 if self.next_counterparty_htlc_id != msg.htlc_id {
2025 return Err(ChannelError::Close(format!("Remote skipped HTLC ID (skipped ID: {})", self.next_counterparty_htlc_id)));
2027 if msg.cltv_expiry >= 500000000 {
2028 return Err(ChannelError::Close("Remote provided CLTV expiry in seconds instead of block height".to_owned()));
2031 if self.channel_state & ChannelState::LocalShutdownSent as u32 != 0 {
2032 if let PendingHTLCStatus::Forward(_) = pending_forward_status {
2033 panic!("ChannelManager shouldn't be trying to add a forwardable HTLC after we've started closing");
2037 // Now update local state:
2038 self.next_counterparty_htlc_id += 1;
2039 self.pending_inbound_htlcs.push(InboundHTLCOutput {
2040 htlc_id: msg.htlc_id,
2041 amount_msat: msg.amount_msat,
2042 payment_hash: msg.payment_hash,
2043 cltv_expiry: msg.cltv_expiry,
2044 state: InboundHTLCState::RemoteAnnounced(pending_forward_status),
2049 /// Marks an outbound HTLC which we have received update_fail/fulfill/malformed
2051 fn mark_outbound_htlc_removed(&mut self, htlc_id: u64, check_preimage: Option<PaymentHash>, fail_reason: Option<HTLCFailReason>) -> Result<&HTLCSource, ChannelError> {
2052 for htlc in self.pending_outbound_htlcs.iter_mut() {
2053 if htlc.htlc_id == htlc_id {
2054 match check_preimage {
2056 Some(payment_hash) =>
2057 if payment_hash != htlc.payment_hash {
2058 return Err(ChannelError::Close(format!("Remote tried to fulfill HTLC ({}) with an incorrect preimage", htlc_id)));
2062 OutboundHTLCState::LocalAnnounced(_) =>
2063 return Err(ChannelError::Close(format!("Remote tried to fulfill/fail HTLC ({}) before it had been committed", htlc_id))),
2064 OutboundHTLCState::Committed => {
2065 htlc.state = OutboundHTLCState::RemoteRemoved(fail_reason);
2067 OutboundHTLCState::AwaitingRemoteRevokeToRemove(_) | OutboundHTLCState::AwaitingRemovedRemoteRevoke(_) | OutboundHTLCState::RemoteRemoved(_) =>
2068 return Err(ChannelError::Close(format!("Remote tried to fulfill/fail HTLC ({}) that they'd already fulfilled/failed", htlc_id))),
2070 return Ok(&htlc.source);
2073 Err(ChannelError::Close("Remote tried to fulfill/fail an HTLC we couldn't find".to_owned()))
2076 pub fn update_fulfill_htlc(&mut self, msg: &msgs::UpdateFulfillHTLC) -> Result<HTLCSource, ChannelError> {
2077 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
2078 return Err(ChannelError::Close("Got fulfill HTLC message when channel was not in an operational state".to_owned()));
2080 if self.channel_state & (ChannelState::PeerDisconnected as u32) == ChannelState::PeerDisconnected as u32 {
2081 return Err(ChannelError::Close("Peer sent update_fulfill_htlc when we needed a channel_reestablish".to_owned()));
2084 let payment_hash = PaymentHash(Sha256::hash(&msg.payment_preimage.0[..]).into_inner());
2085 self.mark_outbound_htlc_removed(msg.htlc_id, Some(payment_hash), None).map(|source| source.clone())
2088 pub fn update_fail_htlc(&mut self, msg: &msgs::UpdateFailHTLC, fail_reason: HTLCFailReason) -> Result<(), ChannelError> {
2089 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
2090 return Err(ChannelError::Close("Got fail HTLC message when channel was not in an operational state".to_owned()));
2092 if self.channel_state & (ChannelState::PeerDisconnected as u32) == ChannelState::PeerDisconnected as u32 {
2093 return Err(ChannelError::Close("Peer sent update_fail_htlc when we needed a channel_reestablish".to_owned()));
2096 self.mark_outbound_htlc_removed(msg.htlc_id, None, Some(fail_reason))?;
2100 pub fn update_fail_malformed_htlc(&mut self, msg: &msgs::UpdateFailMalformedHTLC, fail_reason: HTLCFailReason) -> Result<(), ChannelError> {
2101 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
2102 return Err(ChannelError::Close("Got fail malformed HTLC message when channel was not in an operational state".to_owned()));
2104 if self.channel_state & (ChannelState::PeerDisconnected as u32) == ChannelState::PeerDisconnected as u32 {
2105 return Err(ChannelError::Close("Peer sent update_fail_malformed_htlc when we needed a channel_reestablish".to_owned()));
2108 self.mark_outbound_htlc_removed(msg.htlc_id, None, Some(fail_reason))?;
2112 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)>
2113 where F::Target: FeeEstimator,
2116 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
2117 return Err((None, ChannelError::Close("Got commitment signed message when channel was not in an operational state".to_owned())));
2119 if self.channel_state & (ChannelState::PeerDisconnected as u32) == ChannelState::PeerDisconnected as u32 {
2120 return Err((None, ChannelError::Close("Peer sent commitment_signed when we needed a channel_reestablish".to_owned())));
2122 if self.channel_state & BOTH_SIDES_SHUTDOWN_MASK == BOTH_SIDES_SHUTDOWN_MASK && self.last_sent_closing_fee.is_some() {
2123 return Err((None, ChannelError::Close("Peer sent commitment_signed after we'd started exchanging closing_signeds".to_owned())));
2126 let funding_script = self.get_funding_redeemscript();
2128 let keys = self.build_holder_transaction_keys(self.cur_holder_commitment_transaction_number).map_err(|e| (None, e))?;
2130 let mut update_fee = false;
2131 let feerate_per_kw = if !self.is_outbound() && self.pending_update_fee.is_some() {
2133 self.pending_update_fee.unwrap()
2138 let (num_htlcs, mut htlcs_cloned, commitment_tx, commitment_txid) = {
2139 let commitment_tx = self.build_commitment_transaction(self.cur_holder_commitment_transaction_number, &keys, true, false, feerate_per_kw, logger);
2140 let commitment_txid = {
2141 let trusted_tx = commitment_tx.0.trust();
2142 let bitcoin_tx = trusted_tx.built_transaction();
2143 let sighash = bitcoin_tx.get_sighash_all(&funding_script, self.channel_value_satoshis);
2145 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));
2146 if let Err(_) = self.secp_ctx.verify(&sighash, &msg.signature, &self.counterparty_funding_pubkey()) {
2147 return Err((None, ChannelError::Close("Invalid commitment tx signature from peer".to_owned())));
2151 let htlcs_cloned: Vec<_> = commitment_tx.2.iter().map(|htlc| (htlc.0.clone(), htlc.1.map(|h| h.clone()))).collect();
2152 (commitment_tx.1, htlcs_cloned, commitment_tx.0, commitment_txid)
2155 let total_fee = feerate_per_kw as u64 * (COMMITMENT_TX_BASE_WEIGHT + (num_htlcs as u64) * COMMITMENT_TX_WEIGHT_PER_HTLC) / 1000;
2156 //If channel fee was updated by funder confirm funder can afford the new fee rate when applied to the current local commitment transaction
2158 let counterparty_reserve_we_require = Channel::<Signer>::get_holder_selected_channel_reserve_satoshis(self.channel_value_satoshis);
2159 if self.channel_value_satoshis - self.value_to_self_msat / 1000 < total_fee + counterparty_reserve_we_require {
2160 return Err((None, ChannelError::Close("Funding remote cannot afford proposed new fee".to_owned())));
2163 #[cfg(any(test, feature = "fuzztarget"))]
2165 if self.is_outbound() {
2166 let projected_commit_tx_info = self.next_local_commitment_tx_fee_info_cached.lock().unwrap().take();
2167 *self.next_remote_commitment_tx_fee_info_cached.lock().unwrap() = None;
2168 if let Some(info) = projected_commit_tx_info {
2169 let total_pending_htlcs = self.pending_inbound_htlcs.len() + self.pending_outbound_htlcs.len()
2170 + self.holding_cell_htlc_updates.len();
2171 if info.total_pending_htlcs == total_pending_htlcs
2172 && info.next_holder_htlc_id == self.next_holder_htlc_id
2173 && info.next_counterparty_htlc_id == self.next_counterparty_htlc_id
2174 && info.feerate == self.feerate_per_kw {
2175 assert_eq!(total_fee, info.fee / 1000);
2181 if msg.htlc_signatures.len() != num_htlcs {
2182 return Err((None, ChannelError::Close(format!("Got wrong number of HTLC signatures ({}) from remote. It must be {}", msg.htlc_signatures.len(), num_htlcs))));
2185 // TODO: Sadly, we pass HTLCs twice to ChannelMonitor: once via the HolderCommitmentTransaction and once via the update
2186 let mut htlcs_and_sigs = Vec::with_capacity(htlcs_cloned.len());
2187 for (idx, (htlc, source)) in htlcs_cloned.drain(..).enumerate() {
2188 if let Some(_) = htlc.transaction_output_index {
2189 let htlc_tx = self.build_htlc_transaction(&commitment_txid, &htlc, true, &keys, feerate_per_kw);
2190 let htlc_redeemscript = chan_utils::get_htlc_redeemscript(&htlc, &keys);
2191 let htlc_sighash = hash_to_message!(&bip143::SigHashCache::new(&htlc_tx).signature_hash(0, &htlc_redeemscript, htlc.amount_msat / 1000, SigHashType::All)[..]);
2192 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));
2193 if let Err(_) = self.secp_ctx.verify(&htlc_sighash, &msg.htlc_signatures[idx], &keys.countersignatory_htlc_key) {
2194 return Err((None, ChannelError::Close("Invalid HTLC tx signature from peer".to_owned())));
2196 htlcs_and_sigs.push((htlc, Some(msg.htlc_signatures[idx]), source));
2198 htlcs_and_sigs.push((htlc, None, source));
2202 let holder_commitment_tx = HolderCommitmentTransaction::new(
2205 msg.htlc_signatures.clone(),
2206 &self.get_holder_pubkeys().funding_pubkey,
2207 self.counterparty_funding_pubkey()
2210 let next_per_commitment_point = self.holder_signer.get_per_commitment_point(self.cur_holder_commitment_transaction_number - 1, &self.secp_ctx);
2211 let per_commitment_secret = self.holder_signer.release_commitment_secret(self.cur_holder_commitment_transaction_number + 1);
2213 // Update state now that we've passed all the can-fail calls...
2214 let mut need_commitment = false;
2215 if !self.is_outbound() {
2216 if let Some(fee_update) = self.pending_update_fee {
2217 self.feerate_per_kw = fee_update;
2218 // We later use the presence of pending_update_fee to indicate we should generate a
2219 // commitment_signed upon receipt of revoke_and_ack, so we can only set it to None
2220 // if we're not awaiting a revoke (ie will send a commitment_signed now).
2221 if (self.channel_state & ChannelState::AwaitingRemoteRevoke as u32) == 0 {
2222 need_commitment = true;
2223 self.pending_update_fee = None;
2228 self.latest_monitor_update_id += 1;
2229 let mut monitor_update = ChannelMonitorUpdate {
2230 update_id: self.latest_monitor_update_id,
2231 updates: vec![ChannelMonitorUpdateStep::LatestHolderCommitmentTXInfo {
2232 commitment_tx: holder_commitment_tx,
2233 htlc_outputs: htlcs_and_sigs
2237 for htlc in self.pending_inbound_htlcs.iter_mut() {
2238 let new_forward = if let &InboundHTLCState::RemoteAnnounced(ref forward_info) = &htlc.state {
2239 Some(forward_info.clone())
2241 if let Some(forward_info) = new_forward {
2242 htlc.state = InboundHTLCState::AwaitingRemoteRevokeToAnnounce(forward_info);
2243 need_commitment = true;
2246 for htlc in self.pending_outbound_htlcs.iter_mut() {
2247 if let Some(fail_reason) = if let &mut OutboundHTLCState::RemoteRemoved(ref mut fail_reason) = &mut htlc.state {
2248 Some(fail_reason.take())
2250 htlc.state = OutboundHTLCState::AwaitingRemoteRevokeToRemove(fail_reason);
2251 need_commitment = true;
2255 self.cur_holder_commitment_transaction_number -= 1;
2256 // Note that if we need_commitment & !AwaitingRemoteRevoke we'll call
2257 // send_commitment_no_status_check() next which will reset this to RAAFirst.
2258 self.resend_order = RAACommitmentOrder::CommitmentFirst;
2260 if (self.channel_state & ChannelState::MonitorUpdateFailed as u32) != 0 {
2261 // In case we initially failed monitor updating without requiring a response, we need
2262 // to make sure the RAA gets sent first.
2263 self.monitor_pending_revoke_and_ack = true;
2264 if need_commitment && (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32)) == 0 {
2265 // If we were going to send a commitment_signed after the RAA, go ahead and do all
2266 // the corresponding HTLC status updates so that get_last_commitment_update
2267 // includes the right HTLCs.
2268 self.monitor_pending_commitment_signed = true;
2269 let (_, mut additional_update) = self.send_commitment_no_status_check(logger).map_err(|e| (None, e))?;
2270 // send_commitment_no_status_check may bump latest_monitor_id but we want them to be
2271 // strictly increasing by one, so decrement it here.
2272 self.latest_monitor_update_id = monitor_update.update_id;
2273 monitor_update.updates.append(&mut additional_update.updates);
2275 // TODO: Call maybe_propose_first_closing_signed on restoration (or call it here and
2276 // re-send the message on restoration)
2277 return Err((Some(monitor_update), ChannelError::Ignore("Previous monitor update failure prevented generation of RAA".to_owned())));
2280 let (commitment_signed, closing_signed) = if need_commitment && (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32)) == 0 {
2281 // If we're AwaitingRemoteRevoke we can't send a new commitment here, but that's ok -
2282 // we'll send one right away when we get the revoke_and_ack when we
2283 // free_holding_cell_htlcs().
2284 let (msg, mut additional_update) = self.send_commitment_no_status_check(logger).map_err(|e| (None, e))?;
2285 // send_commitment_no_status_check may bump latest_monitor_id but we want them to be
2286 // strictly increasing by one, so decrement it here.
2287 self.latest_monitor_update_id = monitor_update.update_id;
2288 monitor_update.updates.append(&mut additional_update.updates);
2290 } else if !need_commitment {
2291 (None, self.maybe_propose_first_closing_signed(fee_estimator))
2292 } else { (None, None) };
2294 Ok((msgs::RevokeAndACK {
2295 channel_id: self.channel_id,
2296 per_commitment_secret,
2297 next_per_commitment_point,
2298 }, commitment_signed, closing_signed, monitor_update))
2301 /// Used to fulfill holding_cell_htlcs when we get a remote ack (or implicitly get it by them
2302 /// fulfilling or failing the last pending HTLC)
2303 fn free_holding_cell_htlcs<L: Deref>(&mut self, logger: &L) -> Result<(Option<(msgs::CommitmentUpdate, ChannelMonitorUpdate)>, Vec<(HTLCSource, PaymentHash)>), ChannelError> where L::Target: Logger {
2304 assert_eq!(self.channel_state & ChannelState::MonitorUpdateFailed as u32, 0);
2305 if self.holding_cell_htlc_updates.len() != 0 || self.holding_cell_update_fee.is_some() {
2306 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 { "" });
2308 let mut monitor_update = ChannelMonitorUpdate {
2309 update_id: self.latest_monitor_update_id + 1, // We don't increment this yet!
2310 updates: Vec::new(),
2313 let mut htlc_updates = Vec::new();
2314 mem::swap(&mut htlc_updates, &mut self.holding_cell_htlc_updates);
2315 let mut update_add_htlcs = Vec::with_capacity(htlc_updates.len());
2316 let mut update_fulfill_htlcs = Vec::with_capacity(htlc_updates.len());
2317 let mut update_fail_htlcs = Vec::with_capacity(htlc_updates.len());
2318 let mut htlcs_to_fail = Vec::new();
2319 for htlc_update in htlc_updates.drain(..) {
2320 // Note that this *can* fail, though it should be due to rather-rare conditions on
2321 // fee races with adding too many outputs which push our total payments just over
2322 // the limit. In case it's less rare than I anticipate, we may want to revisit
2323 // handling this case better and maybe fulfilling some of the HTLCs while attempting
2324 // to rebalance channels.
2325 match &htlc_update {
2326 &HTLCUpdateAwaitingACK::AddHTLC {amount_msat, cltv_expiry, ref payment_hash, ref source, ref onion_routing_packet, ..} => {
2327 match self.send_htlc(amount_msat, *payment_hash, cltv_expiry, source.clone(), onion_routing_packet.clone()) {
2328 Ok(update_add_msg_option) => update_add_htlcs.push(update_add_msg_option.unwrap()),
2331 ChannelError::Ignore(ref msg) => {
2332 log_info!(logger, "Failed to send HTLC with payment_hash {} due to {}", log_bytes!(payment_hash.0), msg);
2333 // If we fail to send here, then this HTLC should
2334 // be failed backwards. Failing to send here
2335 // indicates that this HTLC may keep being put back
2336 // into the holding cell without ever being
2337 // successfully forwarded/failed/fulfilled, causing
2338 // our counterparty to eventually close on us.
2339 htlcs_to_fail.push((source.clone(), *payment_hash));
2342 panic!("Got a non-IgnoreError action trying to send holding cell HTLC");
2348 &HTLCUpdateAwaitingACK::ClaimHTLC { ref payment_preimage, htlc_id, .. } => {
2349 match self.get_update_fulfill_htlc(htlc_id, *payment_preimage, logger) {
2350 Ok((update_fulfill_msg_option, additional_monitor_update_opt)) => {
2351 update_fulfill_htlcs.push(update_fulfill_msg_option.unwrap());
2352 if let Some(mut additional_monitor_update) = additional_monitor_update_opt {
2353 monitor_update.updates.append(&mut additional_monitor_update.updates);
2357 if let ChannelError::Ignore(_) = e {}
2359 panic!("Got a non-IgnoreError action trying to fulfill holding cell HTLC");
2364 &HTLCUpdateAwaitingACK::FailHTLC { htlc_id, ref err_packet } => {
2365 match self.get_update_fail_htlc(htlc_id, err_packet.clone()) {
2366 Ok(update_fail_msg_option) => update_fail_htlcs.push(update_fail_msg_option.unwrap()),
2368 if let ChannelError::Ignore(_) = e {}
2370 panic!("Got a non-IgnoreError action trying to fail holding cell HTLC");
2377 if update_add_htlcs.is_empty() && update_fulfill_htlcs.is_empty() && update_fail_htlcs.is_empty() && self.holding_cell_update_fee.is_none() {
2378 return Ok((None, htlcs_to_fail));
2380 let update_fee = if let Some(feerate) = self.holding_cell_update_fee {
2381 self.pending_update_fee = self.holding_cell_update_fee.take();
2382 Some(msgs::UpdateFee {
2383 channel_id: self.channel_id,
2384 feerate_per_kw: feerate as u32,
2390 let (commitment_signed, mut additional_update) = self.send_commitment_no_status_check(logger)?;
2391 // send_commitment_no_status_check and get_update_fulfill_htlc may bump latest_monitor_id
2392 // but we want them to be strictly increasing by one, so reset it here.
2393 self.latest_monitor_update_id = monitor_update.update_id;
2394 monitor_update.updates.append(&mut additional_update.updates);
2396 Ok((Some((msgs::CommitmentUpdate {
2398 update_fulfill_htlcs,
2400 update_fail_malformed_htlcs: Vec::new(),
2403 }, monitor_update)), htlcs_to_fail))
2405 Ok((None, Vec::new()))
2409 /// Handles receiving a remote's revoke_and_ack. Note that we may return a new
2410 /// commitment_signed message here in case we had pending outbound HTLCs to add which were
2411 /// waiting on this revoke_and_ack. The generation of this new commitment_signed may also fail,
2412 /// generating an appropriate error *after* the channel state has been updated based on the
2413 /// revoke_and_ack message.
2414 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>
2415 where F::Target: FeeEstimator,
2418 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
2419 return Err(ChannelError::Close("Got revoke/ACK message when channel was not in an operational state".to_owned()));
2421 if self.channel_state & (ChannelState::PeerDisconnected as u32) == ChannelState::PeerDisconnected as u32 {
2422 return Err(ChannelError::Close("Peer sent revoke_and_ack when we needed a channel_reestablish".to_owned()));
2424 if self.channel_state & BOTH_SIDES_SHUTDOWN_MASK == BOTH_SIDES_SHUTDOWN_MASK && self.last_sent_closing_fee.is_some() {
2425 return Err(ChannelError::Close("Peer sent revoke_and_ack after we'd started exchanging closing_signeds".to_owned()));
2428 if let Some(counterparty_prev_commitment_point) = self.counterparty_prev_commitment_point {
2429 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 {
2430 return Err(ChannelError::Close("Got a revoke commitment secret which didn't correspond to their current pubkey".to_owned()));
2434 if self.channel_state & ChannelState::AwaitingRemoteRevoke as u32 == 0 {
2435 // Our counterparty seems to have burned their coins to us (by revoking a state when we
2436 // haven't given them a new commitment transaction to broadcast). We should probably
2437 // take advantage of this by updating our channel monitor, sending them an error, and
2438 // waiting for them to broadcast their latest (now-revoked claim). But, that would be a
2439 // lot of work, and there's some chance this is all a misunderstanding anyway.
2440 // We have to do *something*, though, since our signer may get mad at us for otherwise
2441 // jumping a remote commitment number, so best to just force-close and move on.
2442 return Err(ChannelError::Close("Received an unexpected revoke_and_ack".to_owned()));
2445 #[cfg(any(test, feature = "fuzztarget"))]
2447 *self.next_local_commitment_tx_fee_info_cached.lock().unwrap() = None;
2448 *self.next_remote_commitment_tx_fee_info_cached.lock().unwrap() = None;
2451 self.commitment_secrets.provide_secret(self.cur_counterparty_commitment_transaction_number + 1, msg.per_commitment_secret)
2452 .map_err(|_| ChannelError::Close("Previous secrets did not match new one".to_owned()))?;
2453 self.latest_monitor_update_id += 1;
2454 let mut monitor_update = ChannelMonitorUpdate {
2455 update_id: self.latest_monitor_update_id,
2456 updates: vec![ChannelMonitorUpdateStep::CommitmentSecret {
2457 idx: self.cur_counterparty_commitment_transaction_number + 1,
2458 secret: msg.per_commitment_secret,
2462 // Update state now that we've passed all the can-fail calls...
2463 // (note that we may still fail to generate the new commitment_signed message, but that's
2464 // OK, we step the channel here and *then* if the new generation fails we can fail the
2465 // channel based on that, but stepping stuff here should be safe either way.
2466 self.channel_state &= !(ChannelState::AwaitingRemoteRevoke as u32);
2467 self.counterparty_prev_commitment_point = self.counterparty_cur_commitment_point;
2468 self.counterparty_cur_commitment_point = Some(msg.next_per_commitment_point);
2469 self.cur_counterparty_commitment_transaction_number -= 1;
2471 log_trace!(logger, "Updating HTLCs on receipt of RAA...");
2472 let mut to_forward_infos = Vec::new();
2473 let mut revoked_htlcs = Vec::new();
2474 let mut update_fail_htlcs = Vec::new();
2475 let mut update_fail_malformed_htlcs = Vec::new();
2476 let mut require_commitment = false;
2477 let mut value_to_self_msat_diff: i64 = 0;
2480 // Take references explicitly so that we can hold multiple references to self.
2481 let pending_inbound_htlcs: &mut Vec<_> = &mut self.pending_inbound_htlcs;
2482 let pending_outbound_htlcs: &mut Vec<_> = &mut self.pending_outbound_htlcs;
2484 // We really shouldnt have two passes here, but retain gives a non-mutable ref (Rust bug)
2485 pending_inbound_htlcs.retain(|htlc| {
2486 if let &InboundHTLCState::LocalRemoved(ref reason) = &htlc.state {
2487 log_trace!(logger, " ...removing inbound LocalRemoved {}", log_bytes!(htlc.payment_hash.0));
2488 if let &InboundHTLCRemovalReason::Fulfill(_) = reason {
2489 value_to_self_msat_diff += htlc.amount_msat as i64;
2494 pending_outbound_htlcs.retain(|htlc| {
2495 if let &OutboundHTLCState::AwaitingRemovedRemoteRevoke(ref fail_reason) = &htlc.state {
2496 log_trace!(logger, " ...removing outbound AwaitingRemovedRemoteRevoke {}", log_bytes!(htlc.payment_hash.0));
2497 if let Some(reason) = fail_reason.clone() { // We really want take() here, but, again, non-mut ref :(
2498 revoked_htlcs.push((htlc.source.clone(), htlc.payment_hash, reason));
2500 // They fulfilled, so we sent them money
2501 value_to_self_msat_diff -= htlc.amount_msat as i64;
2506 for htlc in pending_inbound_htlcs.iter_mut() {
2507 let swap = if let &InboundHTLCState::AwaitingRemoteRevokeToAnnounce(_) = &htlc.state {
2508 log_trace!(logger, " ...promoting inbound AwaitingRemoteRevokeToAnnounce {} to Committed", log_bytes!(htlc.payment_hash.0));
2510 } else if let &InboundHTLCState::AwaitingAnnouncedRemoteRevoke(_) = &htlc.state {
2511 log_trace!(logger, " ...promoting inbound AwaitingAnnouncedRemoteRevoke {} to Committed", log_bytes!(htlc.payment_hash.0));
2515 let mut state = InboundHTLCState::Committed;
2516 mem::swap(&mut state, &mut htlc.state);
2518 if let InboundHTLCState::AwaitingRemoteRevokeToAnnounce(forward_info) = state {
2519 htlc.state = InboundHTLCState::AwaitingAnnouncedRemoteRevoke(forward_info);
2520 require_commitment = true;
2521 } else if let InboundHTLCState::AwaitingAnnouncedRemoteRevoke(forward_info) = state {
2522 match forward_info {
2523 PendingHTLCStatus::Fail(fail_msg) => {
2524 require_commitment = true;
2526 HTLCFailureMsg::Relay(msg) => {
2527 htlc.state = InboundHTLCState::LocalRemoved(InboundHTLCRemovalReason::FailRelay(msg.reason.clone()));
2528 update_fail_htlcs.push(msg)
2530 HTLCFailureMsg::Malformed(msg) => {
2531 htlc.state = InboundHTLCState::LocalRemoved(InboundHTLCRemovalReason::FailMalformed((msg.sha256_of_onion, msg.failure_code)));
2532 update_fail_malformed_htlcs.push(msg)
2536 PendingHTLCStatus::Forward(forward_info) => {
2537 to_forward_infos.push((forward_info, htlc.htlc_id));
2538 htlc.state = InboundHTLCState::Committed;
2544 for htlc in pending_outbound_htlcs.iter_mut() {
2545 if let OutboundHTLCState::LocalAnnounced(_) = htlc.state {
2546 log_trace!(logger, " ...promoting outbound LocalAnnounced {} to Committed", log_bytes!(htlc.payment_hash.0));
2547 htlc.state = OutboundHTLCState::Committed;
2549 if let Some(fail_reason) = if let &mut OutboundHTLCState::AwaitingRemoteRevokeToRemove(ref mut fail_reason) = &mut htlc.state {
2550 Some(fail_reason.take())
2552 log_trace!(logger, " ...promoting outbound AwaitingRemoteRevokeToRemove {} to AwaitingRemovedRemoteRevoke", log_bytes!(htlc.payment_hash.0));
2553 htlc.state = OutboundHTLCState::AwaitingRemovedRemoteRevoke(fail_reason);
2554 require_commitment = true;
2558 self.value_to_self_msat = (self.value_to_self_msat as i64 + value_to_self_msat_diff) as u64;
2560 if self.is_outbound() {
2561 if let Some(feerate) = self.pending_update_fee.take() {
2562 self.feerate_per_kw = feerate;
2565 if let Some(feerate) = self.pending_update_fee {
2566 // Because a node cannot send two commitment_signeds in a row without getting a
2567 // revoke_and_ack from us (as it would otherwise not know the per_commitment_point
2568 // it should use to create keys with) and because a node can't send a
2569 // commitment_signed without changes, checking if the feerate is equal to the
2570 // pending feerate update is sufficient to detect require_commitment.
2571 if feerate == self.feerate_per_kw {
2572 require_commitment = true;
2573 self.pending_update_fee = None;
2578 if (self.channel_state & ChannelState::MonitorUpdateFailed as u32) == ChannelState::MonitorUpdateFailed as u32 {
2579 // We can't actually generate a new commitment transaction (incl by freeing holding
2580 // cells) while we can't update the monitor, so we just return what we have.
2581 if require_commitment {
2582 self.monitor_pending_commitment_signed = true;
2583 // When the monitor updating is restored we'll call get_last_commitment_update(),
2584 // which does not update state, but we're definitely now awaiting a remote revoke
2585 // before we can step forward any more, so set it here.
2586 let (_, mut additional_update) = self.send_commitment_no_status_check(logger)?;
2587 // send_commitment_no_status_check may bump latest_monitor_id but we want them to be
2588 // strictly increasing by one, so decrement it here.
2589 self.latest_monitor_update_id = monitor_update.update_id;
2590 monitor_update.updates.append(&mut additional_update.updates);
2592 self.monitor_pending_forwards.append(&mut to_forward_infos);
2593 self.monitor_pending_failures.append(&mut revoked_htlcs);
2594 return Ok((None, Vec::new(), Vec::new(), None, monitor_update, Vec::new()))
2597 match self.free_holding_cell_htlcs(logger)? {
2598 (Some((mut commitment_update, mut additional_update)), htlcs_to_fail) => {
2599 commitment_update.update_fail_htlcs.reserve(update_fail_htlcs.len());
2600 for fail_msg in update_fail_htlcs.drain(..) {
2601 commitment_update.update_fail_htlcs.push(fail_msg);
2603 commitment_update.update_fail_malformed_htlcs.reserve(update_fail_malformed_htlcs.len());
2604 for fail_msg in update_fail_malformed_htlcs.drain(..) {
2605 commitment_update.update_fail_malformed_htlcs.push(fail_msg);
2608 // free_holding_cell_htlcs may bump latest_monitor_id multiple times but we want them to be
2609 // strictly increasing by one, so decrement it here.
2610 self.latest_monitor_update_id = monitor_update.update_id;
2611 monitor_update.updates.append(&mut additional_update.updates);
2613 Ok((Some(commitment_update), to_forward_infos, revoked_htlcs, None, monitor_update, htlcs_to_fail))
2615 (None, htlcs_to_fail) => {
2616 if require_commitment {
2617 let (commitment_signed, mut additional_update) = self.send_commitment_no_status_check(logger)?;
2619 // send_commitment_no_status_check may bump latest_monitor_id but we want them to be
2620 // strictly increasing by one, so decrement it here.
2621 self.latest_monitor_update_id = monitor_update.update_id;
2622 monitor_update.updates.append(&mut additional_update.updates);
2624 Ok((Some(msgs::CommitmentUpdate {
2625 update_add_htlcs: Vec::new(),
2626 update_fulfill_htlcs: Vec::new(),
2628 update_fail_malformed_htlcs,
2631 }), to_forward_infos, revoked_htlcs, None, monitor_update, htlcs_to_fail))
2633 Ok((None, to_forward_infos, revoked_htlcs, self.maybe_propose_first_closing_signed(fee_estimator), monitor_update, htlcs_to_fail))
2640 /// Adds a pending update to this channel. See the doc for send_htlc for
2641 /// further details on the optionness of the return value.
2642 /// You MUST call send_commitment prior to any other calls on this Channel
2643 fn send_update_fee(&mut self, feerate_per_kw: u32) -> Option<msgs::UpdateFee> {
2644 if !self.is_outbound() {
2645 panic!("Cannot send fee from inbound channel");
2647 if !self.is_usable() {
2648 panic!("Cannot update fee until channel is fully established and we haven't started shutting down");
2650 if !self.is_live() {
2651 panic!("Cannot update fee while peer is disconnected/we're awaiting a monitor update (ChannelManager should have caught this)");
2654 if (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32)) == (ChannelState::AwaitingRemoteRevoke as u32) {
2655 self.holding_cell_update_fee = Some(feerate_per_kw);
2659 debug_assert!(self.pending_update_fee.is_none());
2660 self.pending_update_fee = Some(feerate_per_kw);
2662 Some(msgs::UpdateFee {
2663 channel_id: self.channel_id,
2668 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 {
2669 match self.send_update_fee(feerate_per_kw) {
2670 Some(update_fee) => {
2671 let (commitment_signed, monitor_update) = self.send_commitment_no_status_check(logger)?;
2672 Ok(Some((update_fee, commitment_signed, monitor_update)))
2678 /// Removes any uncommitted HTLCs, to be used on peer disconnection, including any pending
2679 /// HTLCs that we intended to add but haven't as we were waiting on a remote revoke.
2680 /// Returns the set of PendingHTLCStatuses from remote uncommitted HTLCs (which we're
2681 /// implicitly dropping) and the payment_hashes of HTLCs we tried to add but are dropping.
2682 /// No further message handling calls may be made until a channel_reestablish dance has
2684 pub fn remove_uncommitted_htlcs_and_mark_paused<L: Deref>(&mut self, logger: &L) -> Vec<(HTLCSource, PaymentHash)> where L::Target: Logger {
2685 let mut outbound_drops = Vec::new();
2687 assert_eq!(self.channel_state & ChannelState::ShutdownComplete as u32, 0);
2688 if self.channel_state < ChannelState::FundingSent as u32 {
2689 self.channel_state = ChannelState::ShutdownComplete as u32;
2690 return outbound_drops;
2692 // Upon reconnect we have to start the closing_signed dance over, but shutdown messages
2693 // will be retransmitted.
2694 self.last_sent_closing_fee = None;
2696 let mut inbound_drop_count = 0;
2697 self.pending_inbound_htlcs.retain(|htlc| {
2699 InboundHTLCState::RemoteAnnounced(_) => {
2700 // They sent us an update_add_htlc but we never got the commitment_signed.
2701 // We'll tell them what commitment_signed we're expecting next and they'll drop
2702 // this HTLC accordingly
2703 inbound_drop_count += 1;
2706 InboundHTLCState::AwaitingRemoteRevokeToAnnounce(_)|InboundHTLCState::AwaitingAnnouncedRemoteRevoke(_) => {
2707 // We received a commitment_signed updating this HTLC and (at least hopefully)
2708 // sent a revoke_and_ack (which we can re-transmit) and have heard nothing
2709 // in response to it yet, so don't touch it.
2712 InboundHTLCState::Committed => true,
2713 InboundHTLCState::LocalRemoved(_) => {
2714 // We (hopefully) sent a commitment_signed updating this HTLC (which we can
2715 // re-transmit if needed) and they may have even sent a revoke_and_ack back
2716 // (that we missed). Keep this around for now and if they tell us they missed
2717 // the commitment_signed we can re-transmit the update then.
2722 self.next_counterparty_htlc_id -= inbound_drop_count;
2724 for htlc in self.pending_outbound_htlcs.iter_mut() {
2725 if let OutboundHTLCState::RemoteRemoved(_) = htlc.state {
2726 // They sent us an update to remove this but haven't yet sent the corresponding
2727 // commitment_signed, we need to move it back to Committed and they can re-send
2728 // the update upon reconnection.
2729 htlc.state = OutboundHTLCState::Committed;
2733 self.holding_cell_htlc_updates.retain(|htlc_update| {
2735 // Note that currently on channel reestablish we assert that there are
2736 // no holding cell HTLC update_adds, so if in the future we stop
2737 // dropping added HTLCs here and failing them backwards, then there will
2738 // need to be corresponding changes made in the Channel's re-establish
2740 &HTLCUpdateAwaitingACK::AddHTLC { ref payment_hash, ref source, .. } => {
2741 outbound_drops.push((source.clone(), payment_hash.clone()));
2744 &HTLCUpdateAwaitingACK::ClaimHTLC {..} | &HTLCUpdateAwaitingACK::FailHTLC {..} => true,
2747 self.channel_state |= ChannelState::PeerDisconnected as u32;
2748 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()));
2752 /// Indicates that a ChannelMonitor update failed to be stored by the client and further
2753 /// updates are partially paused.
2754 /// This must be called immediately after the call which generated the ChannelMonitor update
2755 /// which failed. The messages which were generated from that call which generated the
2756 /// monitor update failure must *not* have been sent to the remote end, and must instead
2757 /// have been dropped. They will be regenerated when monitor_updating_restored is called.
2758 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)>) {
2759 assert_eq!(self.channel_state & ChannelState::MonitorUpdateFailed as u32, 0);
2760 self.monitor_pending_revoke_and_ack = resend_raa;
2761 self.monitor_pending_commitment_signed = resend_commitment;
2762 assert!(self.monitor_pending_forwards.is_empty());
2763 mem::swap(&mut pending_forwards, &mut self.monitor_pending_forwards);
2764 assert!(self.monitor_pending_failures.is_empty());
2765 mem::swap(&mut pending_fails, &mut self.monitor_pending_failures);
2766 self.channel_state |= ChannelState::MonitorUpdateFailed as u32;
2769 /// Indicates that the latest ChannelMonitor update has been committed by the client
2770 /// successfully and we should restore normal operation. Returns messages which should be sent
2771 /// to the remote side.
2772 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)>, bool, Option<msgs::FundingLocked>) where L::Target: Logger {
2773 assert_eq!(self.channel_state & ChannelState::MonitorUpdateFailed as u32, ChannelState::MonitorUpdateFailed as u32);
2774 self.channel_state &= !(ChannelState::MonitorUpdateFailed as u32);
2776 let needs_broadcast_safe = self.channel_state & (ChannelState::FundingSent as u32) != 0 && self.is_outbound();
2778 // Because we will never generate a FundingBroadcastSafe event when we're in
2779 // MonitorUpdateFailed, if we assume the user only broadcast the funding transaction when
2780 // they received the FundingBroadcastSafe event, we can only ever hit
2781 // monitor_pending_funding_locked when we're an inbound channel which failed to persist the
2782 // monitor on funding_created, and we even got the funding transaction confirmed before the
2783 // monitor was persisted.
2784 let funding_locked = if self.monitor_pending_funding_locked {
2785 assert!(!self.is_outbound(), "Funding transaction broadcast without FundingBroadcastSafe!");
2786 self.monitor_pending_funding_locked = false;
2787 let next_per_commitment_point = self.holder_signer.get_per_commitment_point(self.cur_holder_commitment_transaction_number, &self.secp_ctx);
2788 Some(msgs::FundingLocked {
2789 channel_id: self.channel_id(),
2790 next_per_commitment_point,
2794 let mut forwards = Vec::new();
2795 mem::swap(&mut forwards, &mut self.monitor_pending_forwards);
2796 let mut failures = Vec::new();
2797 mem::swap(&mut failures, &mut self.monitor_pending_failures);
2799 if self.channel_state & (ChannelState::PeerDisconnected as u32) != 0 {
2800 self.monitor_pending_revoke_and_ack = false;
2801 self.monitor_pending_commitment_signed = false;
2802 return (None, None, RAACommitmentOrder::RevokeAndACKFirst, forwards, failures, needs_broadcast_safe, funding_locked);
2805 let raa = if self.monitor_pending_revoke_and_ack {
2806 Some(self.get_last_revoke_and_ack())
2808 let commitment_update = if self.monitor_pending_commitment_signed {
2809 Some(self.get_last_commitment_update(logger))
2812 self.monitor_pending_revoke_and_ack = false;
2813 self.monitor_pending_commitment_signed = false;
2814 let order = self.resend_order.clone();
2815 log_trace!(logger, "Restored monitor updating resulting in {}{} commitment update and {} RAA, with {} first",
2816 if needs_broadcast_safe { "a funding broadcast safe, " } else { "" },
2817 if commitment_update.is_some() { "a" } else { "no" },
2818 if raa.is_some() { "an" } else { "no" },
2819 match order { RAACommitmentOrder::CommitmentFirst => "commitment", RAACommitmentOrder::RevokeAndACKFirst => "RAA"});
2820 (raa, commitment_update, order, forwards, failures, needs_broadcast_safe, funding_locked)
2823 pub fn update_fee<F: Deref>(&mut self, fee_estimator: &F, msg: &msgs::UpdateFee) -> Result<(), ChannelError>
2824 where F::Target: FeeEstimator
2826 if self.is_outbound() {
2827 return Err(ChannelError::Close("Non-funding remote tried to update channel fee".to_owned()));
2829 if self.channel_state & (ChannelState::PeerDisconnected as u32) == ChannelState::PeerDisconnected as u32 {
2830 return Err(ChannelError::Close("Peer sent update_fee when we needed a channel_reestablish".to_owned()));
2832 Channel::<Signer>::check_remote_fee(fee_estimator, msg.feerate_per_kw)?;
2833 self.pending_update_fee = Some(msg.feerate_per_kw);
2834 self.update_time_counter += 1;
2838 fn get_last_revoke_and_ack(&self) -> msgs::RevokeAndACK {
2839 let next_per_commitment_point = self.holder_signer.get_per_commitment_point(self.cur_holder_commitment_transaction_number, &self.secp_ctx);
2840 let per_commitment_secret = self.holder_signer.release_commitment_secret(self.cur_holder_commitment_transaction_number + 2);
2841 msgs::RevokeAndACK {
2842 channel_id: self.channel_id,
2843 per_commitment_secret,
2844 next_per_commitment_point,
2848 fn get_last_commitment_update<L: Deref>(&self, logger: &L) -> msgs::CommitmentUpdate where L::Target: Logger {
2849 let mut update_add_htlcs = Vec::new();
2850 let mut update_fulfill_htlcs = Vec::new();
2851 let mut update_fail_htlcs = Vec::new();
2852 let mut update_fail_malformed_htlcs = Vec::new();
2854 for htlc in self.pending_outbound_htlcs.iter() {
2855 if let &OutboundHTLCState::LocalAnnounced(ref onion_packet) = &htlc.state {
2856 update_add_htlcs.push(msgs::UpdateAddHTLC {
2857 channel_id: self.channel_id(),
2858 htlc_id: htlc.htlc_id,
2859 amount_msat: htlc.amount_msat,
2860 payment_hash: htlc.payment_hash,
2861 cltv_expiry: htlc.cltv_expiry,
2862 onion_routing_packet: (**onion_packet).clone(),
2867 for htlc in self.pending_inbound_htlcs.iter() {
2868 if let &InboundHTLCState::LocalRemoved(ref reason) = &htlc.state {
2870 &InboundHTLCRemovalReason::FailRelay(ref err_packet) => {
2871 update_fail_htlcs.push(msgs::UpdateFailHTLC {
2872 channel_id: self.channel_id(),
2873 htlc_id: htlc.htlc_id,
2874 reason: err_packet.clone()
2877 &InboundHTLCRemovalReason::FailMalformed((ref sha256_of_onion, ref failure_code)) => {
2878 update_fail_malformed_htlcs.push(msgs::UpdateFailMalformedHTLC {
2879 channel_id: self.channel_id(),
2880 htlc_id: htlc.htlc_id,
2881 sha256_of_onion: sha256_of_onion.clone(),
2882 failure_code: failure_code.clone(),
2885 &InboundHTLCRemovalReason::Fulfill(ref payment_preimage) => {
2886 update_fulfill_htlcs.push(msgs::UpdateFulfillHTLC {
2887 channel_id: self.channel_id(),
2888 htlc_id: htlc.htlc_id,
2889 payment_preimage: payment_preimage.clone(),
2896 log_trace!(logger, "Regenerated latest commitment update with {} update_adds, {} update_fulfills, {} update_fails, and {} update_fail_malformeds",
2897 update_add_htlcs.len(), update_fulfill_htlcs.len(), update_fail_htlcs.len(), update_fail_malformed_htlcs.len());
2898 msgs::CommitmentUpdate {
2899 update_add_htlcs, update_fulfill_htlcs, update_fail_htlcs, update_fail_malformed_htlcs,
2901 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,
2905 /// May panic if some calls other than message-handling calls (which will all Err immediately)
2906 /// have been called between remove_uncommitted_htlcs_and_mark_paused and this call.
2907 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 {
2908 if self.channel_state & (ChannelState::PeerDisconnected as u32) == 0 {
2909 // While BOLT 2 doesn't indicate explicitly we should error this channel here, it
2910 // almost certainly indicates we are going to end up out-of-sync in some way, so we
2911 // just close here instead of trying to recover.
2912 return Err(ChannelError::Close("Peer sent a loose channel_reestablish not after reconnect".to_owned()));
2915 if msg.next_local_commitment_number >= INITIAL_COMMITMENT_NUMBER || msg.next_remote_commitment_number >= INITIAL_COMMITMENT_NUMBER ||
2916 msg.next_local_commitment_number == 0 {
2917 return Err(ChannelError::Close("Peer sent a garbage channel_reestablish".to_owned()));
2920 if msg.next_remote_commitment_number > 0 {
2921 match msg.data_loss_protect {
2922 OptionalField::Present(ref data_loss) => {
2923 let expected_point = self.holder_signer.get_per_commitment_point(INITIAL_COMMITMENT_NUMBER - msg.next_remote_commitment_number + 1, &self.secp_ctx);
2924 let given_secret = SecretKey::from_slice(&data_loss.your_last_per_commitment_secret)
2925 .map_err(|_| ChannelError::Close("Peer sent a garbage channel_reestablish with unparseable secret key".to_owned()))?;
2926 if expected_point != PublicKey::from_secret_key(&self.secp_ctx, &given_secret) {
2927 return Err(ChannelError::Close("Peer sent a garbage channel_reestablish with secret key not matching the commitment height provided".to_owned()));
2929 if msg.next_remote_commitment_number > INITIAL_COMMITMENT_NUMBER - self.cur_holder_commitment_transaction_number {
2930 return Err(ChannelError::CloseDelayBroadcast(
2931 "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()
2935 OptionalField::Absent => {}
2939 // Go ahead and unmark PeerDisconnected as various calls we may make check for it (and all
2940 // remaining cases either succeed or ErrorMessage-fail).
2941 self.channel_state &= !(ChannelState::PeerDisconnected as u32);
2943 let shutdown_msg = if self.channel_state & (ChannelState::LocalShutdownSent as u32) != 0 {
2944 Some(msgs::Shutdown {
2945 channel_id: self.channel_id,
2946 scriptpubkey: self.get_closing_scriptpubkey(),
2950 if self.channel_state & (ChannelState::FundingSent as u32) == ChannelState::FundingSent as u32 {
2951 // If we're waiting on a monitor update, we shouldn't re-send any funding_locked's.
2952 if self.channel_state & (ChannelState::OurFundingLocked as u32) == 0 ||
2953 self.channel_state & (ChannelState::MonitorUpdateFailed as u32) != 0 {
2954 if msg.next_remote_commitment_number != 0 {
2955 return Err(ChannelError::Close("Peer claimed they saw a revoke_and_ack but we haven't sent funding_locked yet".to_owned()));
2957 // Short circuit the whole handler as there is nothing we can resend them
2958 return Ok((None, None, None, None, RAACommitmentOrder::CommitmentFirst, shutdown_msg));
2961 // We have OurFundingLocked set!
2962 let next_per_commitment_point = self.holder_signer.get_per_commitment_point(self.cur_holder_commitment_transaction_number, &self.secp_ctx);
2963 return Ok((Some(msgs::FundingLocked {
2964 channel_id: self.channel_id(),
2965 next_per_commitment_point,
2966 }), None, None, None, RAACommitmentOrder::CommitmentFirst, shutdown_msg));
2969 let required_revoke = if msg.next_remote_commitment_number + 1 == INITIAL_COMMITMENT_NUMBER - self.cur_holder_commitment_transaction_number {
2970 // Remote isn't waiting on any RevokeAndACK from us!
2971 // Note that if we need to repeat our FundingLocked we'll do that in the next if block.
2973 } else if msg.next_remote_commitment_number + 1 == (INITIAL_COMMITMENT_NUMBER - 1) - self.cur_holder_commitment_transaction_number {
2974 if self.channel_state & (ChannelState::MonitorUpdateFailed as u32) != 0 {
2975 self.monitor_pending_revoke_and_ack = true;
2978 Some(self.get_last_revoke_and_ack())
2981 return Err(ChannelError::Close("Peer attempted to reestablish channel with a very old local commitment transaction".to_owned()));
2984 // We increment cur_counterparty_commitment_transaction_number only upon receipt of
2985 // revoke_and_ack, not on sending commitment_signed, so we add one if have
2986 // AwaitingRemoteRevoke set, which indicates we sent a commitment_signed but haven't gotten
2987 // the corresponding revoke_and_ack back yet.
2988 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 };
2990 let resend_funding_locked = if msg.next_local_commitment_number == 1 && INITIAL_COMMITMENT_NUMBER - self.cur_holder_commitment_transaction_number == 1 {
2991 // We should never have to worry about MonitorUpdateFailed resending FundingLocked
2992 let next_per_commitment_point = self.holder_signer.get_per_commitment_point(self.cur_holder_commitment_transaction_number, &self.secp_ctx);
2993 Some(msgs::FundingLocked {
2994 channel_id: self.channel_id(),
2995 next_per_commitment_point,
2999 if msg.next_local_commitment_number == next_counterparty_commitment_number {
3000 if required_revoke.is_some() {
3001 log_debug!(logger, "Reconnected channel {} with only lost outbound RAA", log_bytes!(self.channel_id()));
3003 log_debug!(logger, "Reconnected channel {} with no loss", log_bytes!(self.channel_id()));
3006 if (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32 | ChannelState::MonitorUpdateFailed as u32)) == 0 {
3007 // Note that if in the future we no longer drop holding cell update_adds on peer
3008 // disconnect, this logic will need to be updated.
3009 for htlc_update in self.holding_cell_htlc_updates.iter() {
3010 if let &HTLCUpdateAwaitingACK::AddHTLC { .. } = htlc_update {
3011 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.");
3015 // We're up-to-date and not waiting on a remote revoke (if we are our
3016 // channel_reestablish should result in them sending a revoke_and_ack), but we may
3017 // have received some updates while we were disconnected. Free the holding cell
3019 match self.free_holding_cell_htlcs(logger) {
3020 Err(ChannelError::Close(msg)) => return Err(ChannelError::Close(msg)),
3021 Err(ChannelError::Ignore(_)) | Err(ChannelError::CloseDelayBroadcast(_)) => panic!("Got non-channel-failing result from free_holding_cell_htlcs"),
3022 Ok((Some((commitment_update, monitor_update)), htlcs_to_fail)) => {
3023 // If in the future we no longer drop holding cell update_adds on peer
3024 // disconnect, we may be handed some HTLCs to fail backwards here.
3025 assert!(htlcs_to_fail.is_empty());
3026 return Ok((resend_funding_locked, required_revoke, Some(commitment_update), Some(monitor_update), self.resend_order.clone(), shutdown_msg));
3028 Ok((None, htlcs_to_fail)) => {
3029 // If in the future we no longer drop holding cell update_adds on peer
3030 // disconnect, we may be handed some HTLCs to fail backwards here.
3031 assert!(htlcs_to_fail.is_empty());
3032 return Ok((resend_funding_locked, required_revoke, None, None, self.resend_order.clone(), shutdown_msg));
3036 return Ok((resend_funding_locked, required_revoke, None, None, self.resend_order.clone(), shutdown_msg));
3038 } else if msg.next_local_commitment_number == next_counterparty_commitment_number - 1 {
3039 if required_revoke.is_some() {
3040 log_debug!(logger, "Reconnected channel {} with lost outbound RAA and lost remote commitment tx", log_bytes!(self.channel_id()));
3042 log_debug!(logger, "Reconnected channel {} with only lost remote commitment tx", log_bytes!(self.channel_id()));
3045 if self.channel_state & (ChannelState::MonitorUpdateFailed as u32) != 0 {
3046 self.monitor_pending_commitment_signed = true;
3047 return Ok((resend_funding_locked, None, None, None, self.resend_order.clone(), shutdown_msg));
3050 return Ok((resend_funding_locked, required_revoke, Some(self.get_last_commitment_update(logger)), None, self.resend_order.clone(), shutdown_msg));
3052 return Err(ChannelError::Close("Peer attempted to reestablish channel with a very old remote commitment transaction".to_owned()));
3056 fn maybe_propose_first_closing_signed<F: Deref>(&mut self, fee_estimator: &F) -> Option<msgs::ClosingSigned>
3057 where F::Target: FeeEstimator
3059 if !self.is_outbound() || !self.pending_inbound_htlcs.is_empty() || !self.pending_outbound_htlcs.is_empty() ||
3060 self.channel_state & (BOTH_SIDES_SHUTDOWN_MASK | ChannelState::AwaitingRemoteRevoke as u32) != BOTH_SIDES_SHUTDOWN_MASK ||
3061 self.last_sent_closing_fee.is_some() || self.pending_update_fee.is_some() {
3065 let mut proposed_feerate = fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Background);
3066 if self.feerate_per_kw > proposed_feerate {
3067 proposed_feerate = self.feerate_per_kw;
3069 let tx_weight = self.get_closing_transaction_weight(Some(&self.get_closing_scriptpubkey()), Some(self.counterparty_shutdown_scriptpubkey.as_ref().unwrap()));
3070 let proposed_total_fee_satoshis = proposed_feerate as u64 * tx_weight / 1000;
3072 let (closing_tx, total_fee_satoshis) = self.build_closing_transaction(proposed_total_fee_satoshis, false);
3073 let sig = self.holder_signer
3074 .sign_closing_transaction(&closing_tx, &self.secp_ctx)
3076 assert!(closing_tx.get_weight() as u64 <= tx_weight);
3077 if sig.is_none() { return None; }
3079 self.last_sent_closing_fee = Some((proposed_feerate, total_fee_satoshis, sig.clone().unwrap()));
3080 Some(msgs::ClosingSigned {
3081 channel_id: self.channel_id,
3082 fee_satoshis: total_fee_satoshis,
3083 signature: sig.unwrap(),
3087 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>
3088 where F::Target: FeeEstimator
3090 if self.channel_state & (ChannelState::PeerDisconnected as u32) == ChannelState::PeerDisconnected as u32 {
3091 return Err(ChannelError::Close("Peer sent shutdown when we needed a channel_reestablish".to_owned()));
3093 if self.channel_state < ChannelState::FundingSent as u32 {
3094 // Spec says we should fail the connection, not the channel, but that's nonsense, there
3095 // are plenty of reasons you may want to fail a channel pre-funding, and spec says you
3096 // can do that via error message without getting a connection fail anyway...
3097 return Err(ChannelError::Close("Peer sent shutdown pre-funding generation".to_owned()));
3099 for htlc in self.pending_inbound_htlcs.iter() {
3100 if let InboundHTLCState::RemoteAnnounced(_) = htlc.state {
3101 return Err(ChannelError::Close("Got shutdown with remote pending HTLCs".to_owned()));
3104 assert_eq!(self.channel_state & ChannelState::ShutdownComplete as u32, 0);
3106 if is_unsupported_shutdown_script(&their_features, &msg.scriptpubkey) {
3107 return Err(ChannelError::Close(format!("Got a nonstandard scriptpubkey ({}) from remote peer", msg.scriptpubkey.to_bytes().to_hex())));
3110 if self.counterparty_shutdown_scriptpubkey.is_some() {
3111 if Some(&msg.scriptpubkey) != self.counterparty_shutdown_scriptpubkey.as_ref() {
3112 return Err(ChannelError::Close(format!("Got shutdown request with a scriptpubkey ({}) which did not match their previous scriptpubkey.", msg.scriptpubkey.to_bytes().to_hex())));
3115 self.counterparty_shutdown_scriptpubkey = Some(msg.scriptpubkey.clone());
3118 // From here on out, we may not fail!
3120 self.channel_state |= ChannelState::RemoteShutdownSent as u32;
3121 self.update_time_counter += 1;
3123 // We can't send our shutdown until we've committed all of our pending HTLCs, but the
3124 // remote side is unlikely to accept any new HTLCs, so we go ahead and "free" any holding
3125 // cell HTLCs and return them to fail the payment.
3126 self.holding_cell_update_fee = None;
3127 let mut dropped_outbound_htlcs = Vec::with_capacity(self.holding_cell_htlc_updates.len());
3128 self.holding_cell_htlc_updates.retain(|htlc_update| {
3130 &HTLCUpdateAwaitingACK::AddHTLC { ref payment_hash, ref source, .. } => {
3131 dropped_outbound_htlcs.push((source.clone(), payment_hash.clone()));
3137 // If we have any LocalAnnounced updates we'll probably just get back a update_fail_htlc
3138 // immediately after the commitment dance, but we can send a Shutdown cause we won't send
3139 // any further commitment updates after we set LocalShutdownSent.
3141 let shutdown = if (self.channel_state & ChannelState::LocalShutdownSent as u32) == ChannelState::LocalShutdownSent as u32 {
3144 Some(msgs::Shutdown {
3145 channel_id: self.channel_id,
3146 scriptpubkey: self.get_closing_scriptpubkey(),
3150 self.channel_state |= ChannelState::LocalShutdownSent as u32;
3151 self.update_time_counter += 1;
3153 Ok((shutdown, self.maybe_propose_first_closing_signed(fee_estimator), dropped_outbound_htlcs))
3156 fn build_signed_closing_transaction(&self, tx: &mut Transaction, counterparty_sig: &Signature, sig: &Signature) {
3157 if tx.input.len() != 1 { panic!("Tried to sign closing transaction that had input count != 1!"); }
3158 if tx.input[0].witness.len() != 0 { panic!("Tried to re-sign closing transaction"); }
3159 if tx.output.len() > 2 { panic!("Tried to sign bogus closing transaction"); }
3161 tx.input[0].witness.push(Vec::new()); // First is the multisig dummy
3163 let funding_key = self.get_holder_pubkeys().funding_pubkey.serialize();
3164 let counterparty_funding_key = self.counterparty_funding_pubkey().serialize();
3165 if funding_key[..] < counterparty_funding_key[..] {
3166 tx.input[0].witness.push(sig.serialize_der().to_vec());
3167 tx.input[0].witness.push(counterparty_sig.serialize_der().to_vec());
3169 tx.input[0].witness.push(counterparty_sig.serialize_der().to_vec());
3170 tx.input[0].witness.push(sig.serialize_der().to_vec());
3172 tx.input[0].witness[1].push(SigHashType::All as u8);
3173 tx.input[0].witness[2].push(SigHashType::All as u8);
3175 tx.input[0].witness.push(self.get_funding_redeemscript().into_bytes());
3178 pub fn closing_signed<F: Deref>(&mut self, fee_estimator: &F, msg: &msgs::ClosingSigned) -> Result<(Option<msgs::ClosingSigned>, Option<Transaction>), ChannelError>
3179 where F::Target: FeeEstimator
3181 if self.channel_state & BOTH_SIDES_SHUTDOWN_MASK != BOTH_SIDES_SHUTDOWN_MASK {
3182 return Err(ChannelError::Close("Remote end sent us a closing_signed before both sides provided a shutdown".to_owned()));
3184 if self.channel_state & (ChannelState::PeerDisconnected as u32) == ChannelState::PeerDisconnected as u32 {
3185 return Err(ChannelError::Close("Peer sent closing_signed when we needed a channel_reestablish".to_owned()));
3187 if !self.pending_inbound_htlcs.is_empty() || !self.pending_outbound_htlcs.is_empty() {
3188 return Err(ChannelError::Close("Remote end sent us a closing_signed while there were still pending HTLCs".to_owned()));
3190 if msg.fee_satoshis > 21_000_000 * 1_0000_0000 { //this is required to stop potential overflow in build_closing_transaction
3191 return Err(ChannelError::Close("Remote tried to send us a closing tx with > 21 million BTC fee".to_owned()));
3194 let funding_redeemscript = self.get_funding_redeemscript();
3195 let (mut closing_tx, used_total_fee) = self.build_closing_transaction(msg.fee_satoshis, false);
3196 if used_total_fee != msg.fee_satoshis {
3197 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)));
3199 let mut sighash = hash_to_message!(&bip143::SigHashCache::new(&closing_tx).signature_hash(0, &funding_redeemscript, self.channel_value_satoshis, SigHashType::All)[..]);
3201 match self.secp_ctx.verify(&sighash, &msg.signature, &self.get_counterparty_pubkeys().funding_pubkey) {
3204 // The remote end may have decided to revoke their output due to inconsistent dust
3205 // limits, so check for that case by re-checking the signature here.
3206 closing_tx = self.build_closing_transaction(msg.fee_satoshis, true).0;
3207 sighash = hash_to_message!(&bip143::SigHashCache::new(&closing_tx).signature_hash(0, &funding_redeemscript, self.channel_value_satoshis, SigHashType::All)[..]);
3208 secp_check!(self.secp_ctx.verify(&sighash, &msg.signature, self.counterparty_funding_pubkey()), "Invalid closing tx signature from peer".to_owned());
3212 let closing_tx_max_weight = self.get_closing_transaction_weight(
3213 if let Some(oup) = closing_tx.output.get(0) { Some(&oup.script_pubkey) } else { None },
3214 if let Some(oup) = closing_tx.output.get(1) { Some(&oup.script_pubkey) } else { None });
3215 if let Some((_, last_fee, sig)) = self.last_sent_closing_fee {
3216 if last_fee == msg.fee_satoshis {
3217 self.build_signed_closing_transaction(&mut closing_tx, &msg.signature, &sig);
3218 assert!(closing_tx.get_weight() as u64 <= closing_tx_max_weight);
3219 debug_assert!(closing_tx.get_weight() as u64 >= closing_tx_max_weight - 2);
3220 self.channel_state = ChannelState::ShutdownComplete as u32;
3221 self.update_time_counter += 1;
3222 return Ok((None, Some(closing_tx)));
3226 macro_rules! propose_new_feerate {
3227 ($new_feerate: expr) => {
3228 let tx_weight = self.get_closing_transaction_weight(Some(&self.get_closing_scriptpubkey()), Some(self.counterparty_shutdown_scriptpubkey.as_ref().unwrap()));
3229 let (closing_tx, used_total_fee) = self.build_closing_transaction($new_feerate as u64 * tx_weight / 1000, false);
3230 let sig = self.holder_signer
3231 .sign_closing_transaction(&closing_tx, &self.secp_ctx)
3232 .map_err(|_| ChannelError::Close("External signer refused to sign closing transaction".to_owned()))?;
3233 assert!(closing_tx.get_weight() as u64 <= tx_weight);
3234 self.last_sent_closing_fee = Some(($new_feerate, used_total_fee, sig.clone()));
3235 return Ok((Some(msgs::ClosingSigned {
3236 channel_id: self.channel_id,
3237 fee_satoshis: used_total_fee,
3243 let mut min_feerate = 253;
3244 if self.is_outbound() {
3245 let max_feerate = fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Normal);
3246 if (msg.fee_satoshis as u64) > max_feerate as u64 * closing_tx_max_weight / 1000 {
3247 if let Some((last_feerate, _, _)) = self.last_sent_closing_fee {
3248 if max_feerate <= last_feerate {
3249 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)));
3252 propose_new_feerate!(max_feerate);
3255 min_feerate = fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Background);
3257 if (msg.fee_satoshis as u64) < min_feerate as u64 * closing_tx_max_weight / 1000 {
3258 if let Some((last_feerate, _, _)) = self.last_sent_closing_fee {
3259 if min_feerate >= last_feerate {
3260 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)));
3263 propose_new_feerate!(min_feerate);
3266 let sig = self.holder_signer
3267 .sign_closing_transaction(&closing_tx, &self.secp_ctx)
3268 .map_err(|_| ChannelError::Close("External signer refused to sign closing transaction".to_owned()))?;
3269 self.build_signed_closing_transaction(&mut closing_tx, &msg.signature, &sig);
3270 assert!(closing_tx.get_weight() as u64 <= closing_tx_max_weight);
3271 debug_assert!(closing_tx.get_weight() as u64 >= closing_tx_max_weight - 2);
3273 self.channel_state = ChannelState::ShutdownComplete as u32;
3274 self.update_time_counter += 1;
3276 Ok((Some(msgs::ClosingSigned {
3277 channel_id: self.channel_id,
3278 fee_satoshis: msg.fee_satoshis,
3280 }), Some(closing_tx)))
3283 // Public utilities:
3285 pub fn channel_id(&self) -> [u8; 32] {
3289 /// Gets the "user_id" value passed into the construction of this channel. It has no special
3290 /// meaning and exists only to allow users to have a persistent identifier of a channel.
3291 pub fn get_user_id(&self) -> u64 {
3295 /// Guaranteed to be Some after both FundingLocked messages have been exchanged (and, thus,
3296 /// is_usable() returns true).
3297 /// Allowed in any state (including after shutdown)
3298 pub fn get_short_channel_id(&self) -> Option<u64> {
3299 self.short_channel_id
3302 /// Returns the funding_txo we either got from our peer, or were given by
3303 /// get_outbound_funding_created.
3304 pub fn get_funding_txo(&self) -> Option<OutPoint> {
3305 self.channel_transaction_parameters.funding_outpoint
3308 fn get_holder_selected_contest_delay(&self) -> u16 {
3309 self.channel_transaction_parameters.holder_selected_contest_delay
3312 fn get_holder_pubkeys(&self) -> &ChannelPublicKeys {
3313 &self.channel_transaction_parameters.holder_pubkeys
3316 fn get_counterparty_selected_contest_delay(&self) -> u16 {
3317 self.channel_transaction_parameters.counterparty_parameters.as_ref().unwrap().selected_contest_delay
3320 fn get_counterparty_pubkeys(&self) -> &ChannelPublicKeys {
3321 &self.channel_transaction_parameters.counterparty_parameters.as_ref().unwrap().pubkeys
3324 /// Allowed in any state (including after shutdown)
3325 pub fn get_counterparty_node_id(&self) -> PublicKey {
3326 self.counterparty_node_id
3329 /// Allowed in any state (including after shutdown)
3331 pub fn get_holder_htlc_minimum_msat(&self) -> u64 {
3332 self.holder_htlc_minimum_msat
3335 /// Allowed in any state (including after shutdown)
3336 pub fn get_announced_htlc_max_msat(&self) -> u64 {
3338 // Upper bound by capacity. We make it a bit less than full capacity to prevent attempts
3339 // to use full capacity. This is an effort to reduce routing failures, because in many cases
3340 // channel might have been used to route very small values (either by honest users or as DoS).
3341 self.channel_value_satoshis * 1000 * 9 / 10,
3343 Channel::<Signer>::get_holder_max_htlc_value_in_flight_msat(self.channel_value_satoshis)
3347 /// Allowed in any state (including after shutdown)
3348 pub fn get_counterparty_htlc_minimum_msat(&self) -> u64 {
3349 self.counterparty_htlc_minimum_msat
3352 pub fn get_value_satoshis(&self) -> u64 {
3353 self.channel_value_satoshis
3356 pub fn get_fee_proportional_millionths(&self) -> u32 {
3357 self.config.fee_proportional_millionths
3361 pub fn get_feerate(&self) -> u32 {
3365 pub fn get_cur_holder_commitment_transaction_number(&self) -> u64 {
3366 self.cur_holder_commitment_transaction_number + 1
3369 pub fn get_cur_counterparty_commitment_transaction_number(&self) -> u64 {
3370 self.cur_counterparty_commitment_transaction_number + 1 - if self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32) != 0 { 1 } else { 0 }
3373 pub fn get_revoked_counterparty_commitment_transaction_number(&self) -> u64 {
3374 self.cur_counterparty_commitment_transaction_number + 2
3378 pub fn get_signer(&self) -> &Signer {
3383 pub fn get_value_stat(&self) -> ChannelValueStat {
3385 value_to_self_msat: self.value_to_self_msat,
3386 channel_value_msat: self.channel_value_satoshis * 1000,
3387 channel_reserve_msat: self.counterparty_selected_channel_reserve_satoshis * 1000,
3388 pending_outbound_htlcs_amount_msat: self.pending_outbound_htlcs.iter().map(|ref h| h.amount_msat).sum::<u64>(),
3389 pending_inbound_htlcs_amount_msat: self.pending_inbound_htlcs.iter().map(|ref h| h.amount_msat).sum::<u64>(),
3390 holding_cell_outbound_amount_msat: {
3392 for h in self.holding_cell_htlc_updates.iter() {
3394 &HTLCUpdateAwaitingACK::AddHTLC{amount_msat, .. } => {
3402 counterparty_max_htlc_value_in_flight_msat: self.counterparty_max_htlc_value_in_flight_msat,
3403 counterparty_dust_limit_msat: self.counterparty_dust_limit_satoshis * 1000,
3407 /// Allowed in any state (including after shutdown)
3408 pub fn get_update_time_counter(&self) -> u32 {
3409 self.update_time_counter
3412 pub fn get_latest_monitor_update_id(&self) -> u64 {
3413 self.latest_monitor_update_id
3416 pub fn should_announce(&self) -> bool {
3417 self.config.announced_channel
3420 pub fn is_outbound(&self) -> bool {
3421 self.channel_transaction_parameters.is_outbound_from_holder
3424 /// Gets the fee we'd want to charge for adding an HTLC output to this Channel
3425 /// Allowed in any state (including after shutdown)
3426 pub fn get_holder_fee_base_msat<F: Deref>(&self, fee_estimator: &F) -> u32
3427 where F::Target: FeeEstimator
3429 // For lack of a better metric, we calculate what it would cost to consolidate the new HTLC
3430 // output value back into a transaction with the regular channel output:
3432 // the fee cost of the HTLC-Success/HTLC-Timeout transaction:
3433 let mut res = self.feerate_per_kw as u64 * cmp::max(HTLC_TIMEOUT_TX_WEIGHT, HTLC_SUCCESS_TX_WEIGHT) / 1000;
3435 if self.is_outbound() {
3436 // + the marginal fee increase cost to us in the commitment transaction:
3437 res += self.feerate_per_kw as u64 * COMMITMENT_TX_WEIGHT_PER_HTLC / 1000;
3440 // + the marginal cost of an input which spends the HTLC-Success/HTLC-Timeout output:
3441 res += fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Normal) as u64 * SPENDING_INPUT_FOR_A_OUTPUT_WEIGHT / 1000;
3446 /// Returns true if we've ever received a message from the remote end for this Channel
3447 pub fn have_received_message(&self) -> bool {
3448 self.channel_state > (ChannelState::OurInitSent as u32)
3451 /// Returns true if this channel is fully established and not known to be closing.
3452 /// Allowed in any state (including after shutdown)
3453 pub fn is_usable(&self) -> bool {
3454 let mask = ChannelState::ChannelFunded as u32 | BOTH_SIDES_SHUTDOWN_MASK;
3455 (self.channel_state & mask) == (ChannelState::ChannelFunded as u32)
3458 /// Returns true if this channel is currently available for use. This is a superset of
3459 /// is_usable() and considers things like the channel being temporarily disabled.
3460 /// Allowed in any state (including after shutdown)
3461 pub fn is_live(&self) -> bool {
3462 self.is_usable() && (self.channel_state & (ChannelState::PeerDisconnected as u32 | ChannelState::MonitorUpdateFailed as u32) == 0)
3465 /// Returns true if this channel has been marked as awaiting a monitor update to move forward.
3466 /// Allowed in any state (including after shutdown)
3467 pub fn is_awaiting_monitor_update(&self) -> bool {
3468 (self.channel_state & ChannelState::MonitorUpdateFailed as u32) != 0
3471 /// Returns true if funding_created was sent/received.
3472 pub fn is_funding_initiated(&self) -> bool {
3473 self.channel_state >= ChannelState::FundingSent as u32
3476 /// Returns true if this channel is fully shut down. True here implies that no further actions
3477 /// may/will be taken on this channel, and thus this object should be freed. Any future changes
3478 /// will be handled appropriately by the chain monitor.
3479 pub fn is_shutdown(&self) -> bool {
3480 if (self.channel_state & ChannelState::ShutdownComplete as u32) == ChannelState::ShutdownComplete as u32 {
3481 assert!(self.channel_state == ChannelState::ShutdownComplete as u32);
3486 pub fn to_disabled_staged(&mut self) {
3487 self.network_sync = UpdateStatus::DisabledStaged;
3490 pub fn to_disabled_marked(&mut self) {
3491 self.network_sync = UpdateStatus::DisabledMarked;
3494 pub fn to_fresh(&mut self) {
3495 self.network_sync = UpdateStatus::Fresh;
3498 pub fn is_disabled_staged(&self) -> bool {
3499 self.network_sync == UpdateStatus::DisabledStaged
3502 pub fn is_disabled_marked(&self) -> bool {
3503 self.network_sync == UpdateStatus::DisabledMarked
3506 /// When we receive a new block, we (a) check whether the block contains the funding
3507 /// transaction (which would start us counting blocks until we send the funding_signed), and
3508 /// (b) check the height of the block against outbound holding cell HTLCs in case we need to
3509 /// give up on them prematurely and time them out. Everything else (e.g. commitment
3510 /// transaction broadcasts, channel closure detection, HTLC transaction broadcasting, etc) is
3511 /// handled by the ChannelMonitor.
3513 /// If we return Err, the channel may have been closed, at which point the standard
3514 /// requirements apply - no calls may be made except those explicitly stated to be allowed
3516 /// Only returns an ErrorAction of DisconnectPeer, if Err.
3518 /// May return some HTLCs (and their payment_hash) which have timed out and should be failed
3520 pub fn block_connected(&mut self, header: &BlockHeader, txdata: &TransactionData, height: u32) -> Result<(Option<msgs::FundingLocked>, Vec<(HTLCSource, PaymentHash)>), msgs::ErrorMessage> {
3521 let mut timed_out_htlcs = Vec::new();
3522 self.holding_cell_htlc_updates.retain(|htlc_update| {
3524 &HTLCUpdateAwaitingACK::AddHTLC { ref payment_hash, ref source, ref cltv_expiry, .. } => {
3525 if *cltv_expiry <= height + HTLC_FAIL_BACK_BUFFER {
3526 timed_out_htlcs.push((source.clone(), payment_hash.clone()));
3534 if self.funding_tx_confirmations > 0 {
3535 self.funding_tx_confirmations += 1;
3538 let non_shutdown_state = self.channel_state & (!MULTI_STATE_FLAGS);
3539 if non_shutdown_state & !(ChannelState::TheirFundingLocked as u32) == ChannelState::FundingSent as u32 {
3540 for &(index_in_block, tx) in txdata.iter() {
3541 let funding_txo = self.get_funding_txo().unwrap();
3542 if tx.txid() == funding_txo.txid {
3543 let txo_idx = funding_txo.index as usize;
3544 if txo_idx >= tx.output.len() || tx.output[txo_idx].script_pubkey != self.get_funding_redeemscript().to_v0_p2wsh() ||
3545 tx.output[txo_idx].value != self.channel_value_satoshis {
3546 if self.is_outbound() {
3547 // If we generated the funding transaction and it doesn't match what it
3548 // should, the client is really broken and we should just panic and
3549 // tell them off. That said, because hash collisions happen with high
3550 // probability in fuzztarget mode, if we're fuzzing we just close the
3551 // channel and move on.
3552 #[cfg(not(feature = "fuzztarget"))]
3553 panic!("Client called ChannelManager::funding_transaction_generated with bogus transaction!");
3555 self.channel_state = ChannelState::ShutdownComplete as u32;
3556 self.update_time_counter += 1;
3557 return Err(msgs::ErrorMessage {
3558 channel_id: self.channel_id(),
3559 data: "funding tx had wrong script/value".to_owned()
3562 if self.is_outbound() {
3563 for input in tx.input.iter() {
3564 if input.witness.is_empty() {
3565 // We generated a malleable funding transaction, implying we've
3566 // just exposed ourselves to funds loss to our counterparty.
3567 #[cfg(not(feature = "fuzztarget"))]
3568 panic!("Client called ChannelManager::funding_transaction_generated with bogus transaction!");
3572 if height > 0xff_ff_ff || (index_in_block) > 0xff_ff_ff {
3573 panic!("Block was bogus - either height 16 million or had > 16 million transactions");
3575 assert!(txo_idx <= 0xffff); // txo_idx is a (u16 as usize), so this is just listed here for completeness
3576 self.funding_tx_confirmations = 1;
3577 self.short_channel_id = Some(((height as u64) << (5*8)) |
3578 ((index_in_block as u64) << (2*8)) |
3579 ((txo_idx as u64) << (0*8)));
3585 self.update_time_counter = cmp::max(self.update_time_counter, header.time);
3586 if self.funding_tx_confirmations > 0 {
3587 if self.funding_tx_confirmations == self.minimum_depth as u64 {
3588 let need_commitment_update = if non_shutdown_state == ChannelState::FundingSent as u32 {
3589 self.channel_state |= ChannelState::OurFundingLocked as u32;
3591 } else if non_shutdown_state == (ChannelState::FundingSent as u32 | ChannelState::TheirFundingLocked as u32) {
3592 self.channel_state = ChannelState::ChannelFunded as u32 | (self.channel_state & MULTI_STATE_FLAGS);
3593 self.update_time_counter += 1;
3595 } else if non_shutdown_state == (ChannelState::FundingSent as u32 | ChannelState::OurFundingLocked as u32) {
3596 // We got a reorg but not enough to trigger a force close, just update
3597 // funding_tx_confirmed_in and return.
3599 } else if self.channel_state < ChannelState::ChannelFunded as u32 {
3600 panic!("Started confirming a channel in a state pre-FundingSent?: {}", self.channel_state);
3602 // We got a reorg but not enough to trigger a force close, just update
3603 // funding_tx_confirmed_in and return.
3606 self.funding_tx_confirmed_in = Some(header.block_hash());
3608 //TODO: Note that this must be a duplicate of the previous commitment point they sent us,
3609 //as otherwise we will have a commitment transaction that they can't revoke (well, kinda,
3610 //they can by sending two revoke_and_acks back-to-back, but not really). This appears to be
3611 //a protocol oversight, but I assume I'm just missing something.
3612 if need_commitment_update {
3613 if self.channel_state & (ChannelState::MonitorUpdateFailed as u32) == 0 {
3614 let next_per_commitment_point = self.holder_signer.get_per_commitment_point(self.cur_holder_commitment_transaction_number, &self.secp_ctx);
3615 return Ok((Some(msgs::FundingLocked {
3616 channel_id: self.channel_id,
3617 next_per_commitment_point,
3618 }), timed_out_htlcs));
3620 self.monitor_pending_funding_locked = true;
3621 return Ok((None, timed_out_htlcs));
3626 Ok((None, timed_out_htlcs))
3629 /// Called by channelmanager based on chain blocks being disconnected.
3630 /// Returns true if we need to close the channel now due to funding transaction
3631 /// unconfirmation/reorg.
3632 pub fn block_disconnected(&mut self, header: &BlockHeader) -> bool {
3633 if self.funding_tx_confirmations > 0 {
3634 self.funding_tx_confirmations -= 1;
3635 if self.funding_tx_confirmations == UNCONF_THRESHOLD as u64 {
3639 if Some(header.block_hash()) == self.funding_tx_confirmed_in {
3640 self.funding_tx_confirmations = self.minimum_depth as u64 - 1;
3645 // Methods to get unprompted messages to send to the remote end (or where we already returned
3646 // something in the handler for the message that prompted this message):
3648 pub fn get_open_channel(&self, chain_hash: BlockHash) -> msgs::OpenChannel {
3649 if !self.is_outbound() {
3650 panic!("Tried to open a channel for an inbound channel?");
3652 if self.channel_state != ChannelState::OurInitSent as u32 {
3653 panic!("Cannot generate an open_channel after we've moved forward");
3656 if self.cur_holder_commitment_transaction_number != INITIAL_COMMITMENT_NUMBER {
3657 panic!("Tried to send an open_channel for a channel that has already advanced");
3660 let first_per_commitment_point = self.holder_signer.get_per_commitment_point(self.cur_holder_commitment_transaction_number, &self.secp_ctx);
3661 let keys = self.get_holder_pubkeys();
3665 temporary_channel_id: self.channel_id,
3666 funding_satoshis: self.channel_value_satoshis,
3667 push_msat: self.channel_value_satoshis * 1000 - self.value_to_self_msat,
3668 dust_limit_satoshis: self.holder_dust_limit_satoshis,
3669 max_htlc_value_in_flight_msat: Channel::<Signer>::get_holder_max_htlc_value_in_flight_msat(self.channel_value_satoshis),
3670 channel_reserve_satoshis: Channel::<Signer>::get_holder_selected_channel_reserve_satoshis(self.channel_value_satoshis),
3671 htlc_minimum_msat: self.holder_htlc_minimum_msat,
3672 feerate_per_kw: self.feerate_per_kw as u32,
3673 to_self_delay: self.get_holder_selected_contest_delay(),
3674 max_accepted_htlcs: OUR_MAX_HTLCS,
3675 funding_pubkey: keys.funding_pubkey,
3676 revocation_basepoint: keys.revocation_basepoint,
3677 payment_point: keys.payment_point,
3678 delayed_payment_basepoint: keys.delayed_payment_basepoint,
3679 htlc_basepoint: keys.htlc_basepoint,
3680 first_per_commitment_point,
3681 channel_flags: if self.config.announced_channel {1} else {0},
3682 shutdown_scriptpubkey: OptionalField::Present(if self.config.commit_upfront_shutdown_pubkey { self.get_closing_scriptpubkey() } else { Builder::new().into_script() })
3686 pub fn get_accept_channel(&self) -> msgs::AcceptChannel {
3687 if self.is_outbound() {
3688 panic!("Tried to send accept_channel for an outbound channel?");
3690 if self.channel_state != (ChannelState::OurInitSent as u32) | (ChannelState::TheirInitSent as u32) {
3691 panic!("Tried to send accept_channel after channel had moved forward");
3693 if self.cur_holder_commitment_transaction_number != INITIAL_COMMITMENT_NUMBER {
3694 panic!("Tried to send an accept_channel for a channel that has already advanced");
3697 let first_per_commitment_point = self.holder_signer.get_per_commitment_point(self.cur_holder_commitment_transaction_number, &self.secp_ctx);
3698 let keys = self.get_holder_pubkeys();
3700 msgs::AcceptChannel {
3701 temporary_channel_id: self.channel_id,
3702 dust_limit_satoshis: self.holder_dust_limit_satoshis,
3703 max_htlc_value_in_flight_msat: Channel::<Signer>::get_holder_max_htlc_value_in_flight_msat(self.channel_value_satoshis),
3704 channel_reserve_satoshis: Channel::<Signer>::get_holder_selected_channel_reserve_satoshis(self.channel_value_satoshis),
3705 htlc_minimum_msat: self.holder_htlc_minimum_msat,
3706 minimum_depth: self.minimum_depth,
3707 to_self_delay: self.get_holder_selected_contest_delay(),
3708 max_accepted_htlcs: OUR_MAX_HTLCS,
3709 funding_pubkey: keys.funding_pubkey,
3710 revocation_basepoint: keys.revocation_basepoint,
3711 payment_point: keys.payment_point,
3712 delayed_payment_basepoint: keys.delayed_payment_basepoint,
3713 htlc_basepoint: keys.htlc_basepoint,
3714 first_per_commitment_point,
3715 shutdown_scriptpubkey: OptionalField::Present(if self.config.commit_upfront_shutdown_pubkey { self.get_closing_scriptpubkey() } else { Builder::new().into_script() })
3719 /// If an Err is returned, it is a ChannelError::Close (for get_outbound_funding_created)
3720 fn get_outbound_funding_created_signature<L: Deref>(&mut self, logger: &L) -> Result<Signature, ChannelError> where L::Target: Logger {
3721 let counterparty_keys = self.build_remote_transaction_keys()?;
3722 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;
3723 Ok(self.holder_signer.sign_counterparty_commitment(&counterparty_initial_commitment_tx, &self.secp_ctx)
3724 .map_err(|_| ChannelError::Close("Failed to get signatures for new commitment_signed".to_owned()))?.0)
3727 /// Updates channel state with knowledge of the funding transaction's txid/index, and generates
3728 /// a funding_created message for the remote peer.
3729 /// Panics if called at some time other than immediately after initial handshake, if called twice,
3730 /// or if called on an inbound channel.
3731 /// Note that channel_id changes during this call!
3732 /// Do NOT broadcast the funding transaction until after a successful funding_signed call!
3733 /// If an Err is returned, it is a ChannelError::Close.
3734 pub fn get_outbound_funding_created<L: Deref>(&mut self, funding_txo: OutPoint, logger: &L) -> Result<msgs::FundingCreated, ChannelError> where L::Target: Logger {
3735 if !self.is_outbound() {
3736 panic!("Tried to create outbound funding_created message on an inbound channel!");
3738 if self.channel_state != (ChannelState::OurInitSent as u32 | ChannelState::TheirInitSent as u32) {
3739 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)");
3741 if self.commitment_secrets.get_min_seen_secret() != (1 << 48) ||
3742 self.cur_counterparty_commitment_transaction_number != INITIAL_COMMITMENT_NUMBER ||
3743 self.cur_holder_commitment_transaction_number != INITIAL_COMMITMENT_NUMBER {
3744 panic!("Should not have advanced channel commitment tx numbers prior to funding_created");
3747 self.channel_transaction_parameters.funding_outpoint = Some(funding_txo);
3748 self.holder_signer.ready_channel(&self.channel_transaction_parameters);
3750 let signature = match self.get_outbound_funding_created_signature(logger) {
3753 log_error!(logger, "Got bad signatures: {:?}!", e);
3754 self.channel_transaction_parameters.funding_outpoint = None;
3759 let temporary_channel_id = self.channel_id;
3761 // Now that we're past error-generating stuff, update our local state:
3763 self.channel_state = ChannelState::FundingCreated as u32;
3764 self.channel_id = funding_txo.to_channel_id();
3766 Ok(msgs::FundingCreated {
3767 temporary_channel_id,
3768 funding_txid: funding_txo.txid,
3769 funding_output_index: funding_txo.index,
3774 /// Gets an UnsignedChannelAnnouncement, as well as a signature covering it using our
3775 /// bitcoin_key, if available, for this channel. The channel must be publicly announceable and
3776 /// available for use (have exchanged FundingLocked messages in both directions). Should be used
3777 /// for both loose and in response to an AnnouncementSignatures message from the remote peer.
3778 /// Will only fail if we're not in a state where channel_announcement may be sent (including
3780 /// Note that the "channel must be funded" requirement is stricter than BOLT 7 requires - see
3781 /// https://github.com/lightningnetwork/lightning-rfc/issues/468
3782 pub fn get_channel_announcement(&self, node_id: PublicKey, chain_hash: BlockHash) -> Result<(msgs::UnsignedChannelAnnouncement, Signature), ChannelError> {
3783 if !self.config.announced_channel {
3784 return Err(ChannelError::Ignore("Channel is not available for public announcements".to_owned()));
3786 if self.channel_state & (ChannelState::ChannelFunded as u32) == 0 {
3787 return Err(ChannelError::Ignore("Cannot get a ChannelAnnouncement until the channel funding has been locked".to_owned()));
3789 if (self.channel_state & (ChannelState::LocalShutdownSent as u32 | ChannelState::ShutdownComplete as u32)) != 0 {
3790 return Err(ChannelError::Ignore("Cannot get a ChannelAnnouncement once the channel is closing".to_owned()));
3793 let were_node_one = node_id.serialize()[..] < self.counterparty_node_id.serialize()[..];
3795 let msg = msgs::UnsignedChannelAnnouncement {
3796 features: ChannelFeatures::known(),
3798 short_channel_id: self.get_short_channel_id().unwrap(),
3799 node_id_1: if were_node_one { node_id } else { self.get_counterparty_node_id() },
3800 node_id_2: if were_node_one { self.get_counterparty_node_id() } else { node_id },
3801 bitcoin_key_1: if were_node_one { self.get_holder_pubkeys().funding_pubkey } else { self.counterparty_funding_pubkey().clone() },
3802 bitcoin_key_2: if were_node_one { self.counterparty_funding_pubkey().clone() } else { self.get_holder_pubkeys().funding_pubkey },
3803 excess_data: Vec::new(),
3806 let sig = self.holder_signer.sign_channel_announcement(&msg, &self.secp_ctx)
3807 .map_err(|_| ChannelError::Ignore("Signer rejected channel_announcement".to_owned()))?;
3812 /// May panic if called on a channel that wasn't immediately-previously
3813 /// self.remove_uncommitted_htlcs_and_mark_paused()'d
3814 pub fn get_channel_reestablish<L: Deref>(&self, logger: &L) -> msgs::ChannelReestablish where L::Target: Logger {
3815 assert_eq!(self.channel_state & ChannelState::PeerDisconnected as u32, ChannelState::PeerDisconnected as u32);
3816 assert_ne!(self.cur_counterparty_commitment_transaction_number, INITIAL_COMMITMENT_NUMBER);
3817 // Prior to static_remotekey, my_current_per_commitment_point was critical to claiming
3818 // current to_remote balances. However, it no longer has any use, and thus is now simply
3819 // set to a dummy (but valid, as required by the spec) public key.
3820 // fuzztarget mode marks a subset of pubkeys as invalid so that we can hit "invalid pubkey"
3821 // branches, but we unwrap it below, so we arbitrarily select a dummy pubkey which is both
3822 // valid, and valid in fuzztarget mode's arbitrary validity criteria:
3823 let mut pk = [2; 33]; pk[1] = 0xff;
3824 let dummy_pubkey = PublicKey::from_slice(&pk).unwrap();
3825 let data_loss_protect = if self.cur_counterparty_commitment_transaction_number + 1 < INITIAL_COMMITMENT_NUMBER {
3826 let remote_last_secret = self.commitment_secrets.get_secret(self.cur_counterparty_commitment_transaction_number + 2).unwrap();
3827 log_trace!(logger, "Enough info to generate a Data Loss Protect with per_commitment_secret {}", log_bytes!(remote_last_secret));
3828 OptionalField::Present(DataLossProtect {
3829 your_last_per_commitment_secret: remote_last_secret,
3830 my_current_per_commitment_point: dummy_pubkey
3833 log_info!(logger, "Sending a data_loss_protect with no previous remote per_commitment_secret");
3834 OptionalField::Present(DataLossProtect {
3835 your_last_per_commitment_secret: [0;32],
3836 my_current_per_commitment_point: dummy_pubkey,
3839 msgs::ChannelReestablish {
3840 channel_id: self.channel_id(),
3841 // The protocol has two different commitment number concepts - the "commitment
3842 // transaction number", which starts from 0 and counts up, and the "revocation key
3843 // index" which starts at INITIAL_COMMITMENT_NUMBER and counts down. We track
3844 // commitment transaction numbers by the index which will be used to reveal the
3845 // revocation key for that commitment transaction, which means we have to convert them
3846 // to protocol-level commitment numbers here...
3848 // next_local_commitment_number is the next commitment_signed number we expect to
3849 // receive (indicating if they need to resend one that we missed).
3850 next_local_commitment_number: INITIAL_COMMITMENT_NUMBER - self.cur_holder_commitment_transaction_number,
3851 // We have to set next_remote_commitment_number to the next revoke_and_ack we expect to
3852 // receive, however we track it by the next commitment number for a remote transaction
3853 // (which is one further, as they always revoke previous commitment transaction, not
3854 // the one we send) so we have to decrement by 1. Note that if
3855 // cur_counterparty_commitment_transaction_number is INITIAL_COMMITMENT_NUMBER we will have
3856 // dropped this channel on disconnect as it hasn't yet reached FundingSent so we can't
3858 next_remote_commitment_number: INITIAL_COMMITMENT_NUMBER - self.cur_counterparty_commitment_transaction_number - 1,
3864 // Send stuff to our remote peers:
3866 /// Adds a pending outbound HTLC to this channel, note that you probably want
3867 /// send_htlc_and_commit instead cause you'll want both messages at once.
3868 /// This returns an option instead of a pure UpdateAddHTLC as we may be in a state where we are
3869 /// waiting on the remote peer to send us a revoke_and_ack during which time we cannot add new
3870 /// HTLCs on the wire or we wouldn't be able to determine what they actually ACK'ed.
3871 /// You MUST call send_commitment prior to any other calls on this Channel
3872 /// If an Err is returned, it's a ChannelError::Ignore!
3873 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> {
3874 if (self.channel_state & (ChannelState::ChannelFunded as u32 | BOTH_SIDES_SHUTDOWN_MASK)) != (ChannelState::ChannelFunded as u32) {
3875 return Err(ChannelError::Ignore("Cannot send HTLC until channel is fully established and we haven't started shutting down".to_owned()));
3877 let channel_total_msat = self.channel_value_satoshis * 1000;
3878 if amount_msat > channel_total_msat {
3879 return Err(ChannelError::Ignore(format!("Cannot send amount {}, because it is more than the total value of the channel {}", amount_msat, channel_total_msat)));
3882 if amount_msat == 0 {
3883 return Err(ChannelError::Ignore("Cannot send 0-msat HTLC".to_owned()));
3886 if amount_msat < self.counterparty_htlc_minimum_msat {
3887 return Err(ChannelError::Ignore(format!("Cannot send less than their minimum HTLC value ({})", self.counterparty_htlc_minimum_msat)));
3890 if (self.channel_state & (ChannelState::PeerDisconnected as u32 | ChannelState::MonitorUpdateFailed as u32)) != 0 {
3891 // Note that this should never really happen, if we're !is_live() on receipt of an
3892 // incoming HTLC for relay will result in us rejecting the HTLC and we won't allow
3893 // the user to send directly into a !is_live() channel. However, if we
3894 // disconnected during the time the previous hop was doing the commitment dance we may
3895 // end up getting here after the forwarding delay. In any case, returning an
3896 // IgnoreError will get ChannelManager to do the right thing and fail backwards now.
3897 return Err(ChannelError::Ignore("Cannot send an HTLC while disconnected/frozen for channel monitor update".to_owned()));
3900 let (outbound_htlc_count, htlc_outbound_value_msat) = self.get_outbound_pending_htlc_stats();
3901 if outbound_htlc_count + 1 > self.counterparty_max_accepted_htlcs as u32 {
3902 return Err(ChannelError::Ignore(format!("Cannot push more than their max accepted HTLCs ({})", self.counterparty_max_accepted_htlcs)));
3904 // Check their_max_htlc_value_in_flight_msat
3905 if htlc_outbound_value_msat + amount_msat > self.counterparty_max_htlc_value_in_flight_msat {
3906 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)));
3909 if !self.is_outbound() {
3910 // Check that we won't violate the remote channel reserve by adding this HTLC.
3911 let counterparty_balance_msat = self.channel_value_satoshis * 1000 - self.value_to_self_msat;
3912 let holder_selected_chan_reserve_msat = Channel::<Signer>::get_holder_selected_channel_reserve_satoshis(self.channel_value_satoshis);
3913 let htlc_candidate = HTLCCandidate::new(amount_msat, HTLCInitiator::LocalOffered);
3914 let counterparty_commit_tx_fee_msat = self.next_remote_commit_tx_fee_msat(htlc_candidate, None);
3915 if counterparty_balance_msat < holder_selected_chan_reserve_msat + counterparty_commit_tx_fee_msat {
3916 return Err(ChannelError::Ignore("Cannot send value that would put counterparty balance under holder-announced channel reserve value".to_owned()));
3920 let pending_value_to_self_msat = self.value_to_self_msat - htlc_outbound_value_msat;
3921 if pending_value_to_self_msat < amount_msat {
3922 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)));
3925 // `2 *` and extra HTLC are for the fee spike buffer.
3926 let commit_tx_fee_msat = if self.is_outbound() {
3927 let htlc_candidate = HTLCCandidate::new(amount_msat, HTLCInitiator::LocalOffered);
3928 2 * self.next_local_commit_tx_fee_msat(htlc_candidate, Some(()))
3930 if pending_value_to_self_msat - amount_msat < commit_tx_fee_msat {
3931 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)));
3934 // Check self.counterparty_selected_channel_reserve_satoshis (the amount we must keep as
3935 // reserve for the remote to have something to claim if we misbehave)
3936 let chan_reserve_msat = self.counterparty_selected_channel_reserve_satoshis * 1000;
3937 if pending_value_to_self_msat - amount_msat - commit_tx_fee_msat < chan_reserve_msat {
3938 return Err(ChannelError::Ignore(format!("Cannot send value that would put our balance under counterparty-announced channel reserve value ({})", chan_reserve_msat)));
3941 // Now update local state:
3942 if (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32)) == (ChannelState::AwaitingRemoteRevoke as u32) {
3943 self.holding_cell_htlc_updates.push(HTLCUpdateAwaitingACK::AddHTLC {
3948 onion_routing_packet,
3953 self.pending_outbound_htlcs.push(OutboundHTLCOutput {
3954 htlc_id: self.next_holder_htlc_id,
3956 payment_hash: payment_hash.clone(),
3958 state: OutboundHTLCState::LocalAnnounced(Box::new(onion_routing_packet.clone())),
3962 let res = msgs::UpdateAddHTLC {
3963 channel_id: self.channel_id,
3964 htlc_id: self.next_holder_htlc_id,
3968 onion_routing_packet,
3970 self.next_holder_htlc_id += 1;
3975 /// Creates a signed commitment transaction to send to the remote peer.
3976 /// Always returns a ChannelError::Close if an immediately-preceding (read: the
3977 /// last call to this Channel) send_htlc returned Ok(Some(_)) and there is an Err.
3978 /// May panic if called except immediately after a successful, Ok(Some(_))-returning send_htlc.
3979 pub fn send_commitment<L: Deref>(&mut self, logger: &L) -> Result<(msgs::CommitmentSigned, ChannelMonitorUpdate), ChannelError> where L::Target: Logger {
3980 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
3981 panic!("Cannot create commitment tx until channel is fully established");
3983 if (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32)) == (ChannelState::AwaitingRemoteRevoke as u32) {
3984 panic!("Cannot create commitment tx until remote revokes their previous commitment");
3986 if (self.channel_state & (ChannelState::PeerDisconnected as u32)) == (ChannelState::PeerDisconnected as u32) {
3987 panic!("Cannot create commitment tx while disconnected, as send_htlc will have returned an Err so a send_commitment precondition has been violated");
3989 if (self.channel_state & (ChannelState::MonitorUpdateFailed as u32)) == (ChannelState::MonitorUpdateFailed as u32) {
3990 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");
3992 let mut have_updates = self.pending_update_fee.is_some();
3993 for htlc in self.pending_outbound_htlcs.iter() {
3994 if let OutboundHTLCState::LocalAnnounced(_) = htlc.state {
3995 have_updates = true;
3997 if have_updates { break; }
3999 for htlc in self.pending_inbound_htlcs.iter() {
4000 if let InboundHTLCState::LocalRemoved(_) = htlc.state {
4001 have_updates = true;
4003 if have_updates { break; }
4006 panic!("Cannot create commitment tx until we have some updates to send");
4008 self.send_commitment_no_status_check(logger)
4010 /// Only fails in case of bad keys
4011 fn send_commitment_no_status_check<L: Deref>(&mut self, logger: &L) -> Result<(msgs::CommitmentSigned, ChannelMonitorUpdate), ChannelError> where L::Target: Logger {
4012 // We can upgrade the status of some HTLCs that are waiting on a commitment, even if we
4013 // fail to generate this, we still are at least at a position where upgrading their status
4015 for htlc in self.pending_inbound_htlcs.iter_mut() {
4016 let new_state = if let &InboundHTLCState::AwaitingRemoteRevokeToAnnounce(ref forward_info) = &htlc.state {
4017 Some(InboundHTLCState::AwaitingAnnouncedRemoteRevoke(forward_info.clone()))
4019 if let Some(state) = new_state {
4023 for htlc in self.pending_outbound_htlcs.iter_mut() {
4024 if let Some(fail_reason) = if let &mut OutboundHTLCState::AwaitingRemoteRevokeToRemove(ref mut fail_reason) = &mut htlc.state {
4025 Some(fail_reason.take())
4027 htlc.state = OutboundHTLCState::AwaitingRemovedRemoteRevoke(fail_reason);
4030 self.resend_order = RAACommitmentOrder::RevokeAndACKFirst;
4032 let (res, counterparty_commitment_txid, htlcs) = match self.send_commitment_no_state_update(logger) {
4033 Ok((res, (counterparty_commitment_tx, mut htlcs))) => {
4034 // Update state now that we've passed all the can-fail calls...
4035 let htlcs_no_ref: Vec<(HTLCOutputInCommitment, Option<Box<HTLCSource>>)> =
4036 htlcs.drain(..).map(|(htlc, htlc_source)| (htlc, htlc_source.map(|source_ref| Box::new(source_ref.clone())))).collect();
4037 (res, counterparty_commitment_tx, htlcs_no_ref)
4039 Err(e) => return Err(e),
4042 self.latest_monitor_update_id += 1;
4043 let monitor_update = ChannelMonitorUpdate {
4044 update_id: self.latest_monitor_update_id,
4045 updates: vec![ChannelMonitorUpdateStep::LatestCounterpartyCommitmentTXInfo {
4046 commitment_txid: counterparty_commitment_txid,
4047 htlc_outputs: htlcs.clone(),
4048 commitment_number: self.cur_counterparty_commitment_transaction_number,
4049 their_revocation_point: self.counterparty_cur_commitment_point.unwrap()
4052 self.channel_state |= ChannelState::AwaitingRemoteRevoke as u32;
4053 Ok((res, monitor_update))
4056 /// Only fails in case of bad keys. Used for channel_reestablish commitment_signed generation
4057 /// when we shouldn't change HTLC/channel state.
4058 fn send_commitment_no_state_update<L: Deref>(&self, logger: &L) -> Result<(msgs::CommitmentSigned, (Txid, Vec<(HTLCOutputInCommitment, Option<&HTLCSource>)>)), ChannelError> where L::Target: Logger {
4059 let mut feerate_per_kw = self.feerate_per_kw;
4060 if let Some(feerate) = self.pending_update_fee {
4061 if self.is_outbound() {
4062 feerate_per_kw = feerate;
4066 let counterparty_keys = self.build_remote_transaction_keys()?;
4067 let counterparty_commitment_tx = self.build_commitment_transaction(self.cur_counterparty_commitment_transaction_number, &counterparty_keys, false, true, feerate_per_kw, logger);
4068 let counterparty_commitment_txid = counterparty_commitment_tx.0.trust().txid();
4069 let (signature, htlc_signatures);
4071 #[cfg(any(test, feature = "fuzztarget"))]
4073 if !self.is_outbound() {
4074 let projected_commit_tx_info = self.next_remote_commitment_tx_fee_info_cached.lock().unwrap().take();
4075 *self.next_local_commitment_tx_fee_info_cached.lock().unwrap() = None;
4076 if let Some(info) = projected_commit_tx_info {
4077 let total_pending_htlcs = self.pending_inbound_htlcs.len() + self.pending_outbound_htlcs.len();
4078 if info.total_pending_htlcs == total_pending_htlcs
4079 && info.next_holder_htlc_id == self.next_holder_htlc_id
4080 && info.next_counterparty_htlc_id == self.next_counterparty_htlc_id
4081 && info.feerate == self.feerate_per_kw {
4082 let actual_fee = self.commit_tx_fee_msat(counterparty_commitment_tx.1);
4083 assert_eq!(actual_fee, info.fee);
4090 let mut htlcs = Vec::with_capacity(counterparty_commitment_tx.2.len());
4091 for &(ref htlc, _) in counterparty_commitment_tx.2.iter() {
4095 let res = self.holder_signer.sign_counterparty_commitment(&counterparty_commitment_tx.0, &self.secp_ctx)
4096 .map_err(|_| ChannelError::Close("Failed to get signatures for new commitment_signed".to_owned()))?;
4098 htlc_signatures = res.1;
4100 log_trace!(logger, "Signed remote commitment tx {} (txid {}) with redeemscript {} -> {}",
4101 encode::serialize_hex(&counterparty_commitment_tx.0.trust().built_transaction().transaction),
4102 &counterparty_commitment_txid,
4103 encode::serialize_hex(&self.get_funding_redeemscript()),
4104 log_bytes!(signature.serialize_compact()[..]));
4106 for (ref htlc_sig, ref htlc) in htlc_signatures.iter().zip(htlcs) {
4107 log_trace!(logger, "Signed remote HTLC tx {} with redeemscript {} with pubkey {} -> {}",
4108 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)),
4109 encode::serialize_hex(&chan_utils::get_htlc_redeemscript(&htlc, &counterparty_keys)),
4110 log_bytes!(counterparty_keys.broadcaster_htlc_key.serialize()),
4111 log_bytes!(htlc_sig.serialize_compact()[..]));
4115 Ok((msgs::CommitmentSigned {
4116 channel_id: self.channel_id,
4119 }, (counterparty_commitment_txid, counterparty_commitment_tx.2)))
4122 /// Adds a pending outbound HTLC to this channel, and creates a signed commitment transaction
4123 /// to send to the remote peer in one go.
4124 /// Shorthand for calling send_htlc() followed by send_commitment(), see docs on those for
4126 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 {
4127 match self.send_htlc(amount_msat, payment_hash, cltv_expiry, source, onion_routing_packet)? {
4128 Some(update_add_htlc) => {
4129 let (commitment_signed, monitor_update) = self.send_commitment_no_status_check(logger)?;
4130 Ok(Some((update_add_htlc, commitment_signed, monitor_update)))
4136 /// Get forwarding information for the counterparty.
4137 pub fn counterparty_forwarding_info(&self) -> Option<CounterpartyForwardingInfo> {
4138 self.counterparty_forwarding_info.clone()
4141 pub fn channel_update(&mut self, msg: &msgs::ChannelUpdate) -> Result<(), ChannelError> {
4142 let usable_channel_value_msat = (self.channel_value_satoshis - self.counterparty_selected_channel_reserve_satoshis) * 1000;
4143 if msg.contents.htlc_minimum_msat >= usable_channel_value_msat {
4144 return Err(ChannelError::Close("Minimum htlc value is greater than channel value".to_string()));
4146 self.counterparty_forwarding_info = Some(CounterpartyForwardingInfo {
4147 fee_base_msat: msg.contents.fee_base_msat,
4148 fee_proportional_millionths: msg.contents.fee_proportional_millionths,
4149 cltv_expiry_delta: msg.contents.cltv_expiry_delta
4155 /// Begins the shutdown process, getting a message for the remote peer and returning all
4156 /// holding cell HTLCs for payment failure.
4157 pub fn get_shutdown(&mut self) -> Result<(msgs::Shutdown, Vec<(HTLCSource, PaymentHash)>), APIError> {
4158 for htlc in self.pending_outbound_htlcs.iter() {
4159 if let OutboundHTLCState::LocalAnnounced(_) = htlc.state {
4160 return Err(APIError::APIMisuseError{err: "Cannot begin shutdown with pending HTLCs. Process pending events first".to_owned()});
4163 if self.channel_state & BOTH_SIDES_SHUTDOWN_MASK != 0 {
4164 if (self.channel_state & ChannelState::LocalShutdownSent as u32) == ChannelState::LocalShutdownSent as u32 {
4165 return Err(APIError::APIMisuseError{err: "Shutdown already in progress".to_owned()});
4167 else if (self.channel_state & ChannelState::RemoteShutdownSent as u32) == ChannelState::RemoteShutdownSent as u32 {
4168 return Err(APIError::ChannelUnavailable{err: "Shutdown already in progress by remote".to_owned()});
4171 assert_eq!(self.channel_state & ChannelState::ShutdownComplete as u32, 0);
4172 if self.channel_state & (ChannelState::PeerDisconnected as u32 | ChannelState::MonitorUpdateFailed as u32) != 0 {
4173 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()});
4176 let closing_script = self.get_closing_scriptpubkey();
4178 // From here on out, we may not fail!
4179 if self.channel_state < ChannelState::FundingSent as u32 {
4180 self.channel_state = ChannelState::ShutdownComplete as u32;
4182 self.channel_state |= ChannelState::LocalShutdownSent as u32;
4184 self.update_time_counter += 1;
4186 // Go ahead and drop holding cell updates as we'd rather fail payments than wait to send
4187 // our shutdown until we've committed all of the pending changes.
4188 self.holding_cell_update_fee = None;
4189 let mut dropped_outbound_htlcs = Vec::with_capacity(self.holding_cell_htlc_updates.len());
4190 self.holding_cell_htlc_updates.retain(|htlc_update| {
4192 &HTLCUpdateAwaitingACK::AddHTLC { ref payment_hash, ref source, .. } => {
4193 dropped_outbound_htlcs.push((source.clone(), payment_hash.clone()));
4200 Ok((msgs::Shutdown {
4201 channel_id: self.channel_id,
4202 scriptpubkey: closing_script,
4203 }, dropped_outbound_htlcs))
4206 /// Gets the latest commitment transaction and any dependent transactions for relay (forcing
4207 /// shutdown of this channel - no more calls into this Channel may be made afterwards except
4208 /// those explicitly stated to be allowed after shutdown completes, eg some simple getters).
4209 /// Also returns the list of payment_hashes for channels which we can safely fail backwards
4210 /// immediately (others we will have to allow to time out).
4211 pub fn force_shutdown(&mut self, should_broadcast: bool) -> (Option<(OutPoint, ChannelMonitorUpdate)>, Vec<(HTLCSource, PaymentHash)>) {
4212 // Note that we MUST only generate a monitor update that indicates force-closure - we're
4213 // called during initialization prior to the chain_monitor in the encompassing ChannelManager
4214 // being fully configured in some cases. Thus, its likely any monitor events we generate will
4215 // be delayed in being processed! See the docs for `ChannelManagerReadArgs` for more.
4216 assert!(self.channel_state != ChannelState::ShutdownComplete as u32);
4218 // We go ahead and "free" any holding cell HTLCs or HTLCs we haven't yet committed to and
4219 // return them to fail the payment.
4220 let mut dropped_outbound_htlcs = Vec::with_capacity(self.holding_cell_htlc_updates.len());
4221 for htlc_update in self.holding_cell_htlc_updates.drain(..) {
4223 HTLCUpdateAwaitingACK::AddHTLC { source, payment_hash, .. } => {
4224 dropped_outbound_htlcs.push((source, payment_hash));
4229 let monitor_update = if let Some(funding_txo) = self.get_funding_txo() {
4230 // If we haven't yet exchanged funding signatures (ie channel_state < FundingSent),
4231 // returning a channel monitor update here would imply a channel monitor update before
4232 // we even registered the channel monitor to begin with, which is invalid.
4233 // Thus, if we aren't actually at a point where we could conceivably broadcast the
4234 // funding transaction, don't return a funding txo (which prevents providing the
4235 // monitor update to the user, even if we return one).
4236 // See test_duplicate_chan_id and test_pre_lockin_no_chan_closed_update for more.
4237 if self.channel_state & (ChannelState::FundingSent as u32 | ChannelState::ChannelFunded as u32 | ChannelState::ShutdownComplete as u32) != 0 {
4238 self.latest_monitor_update_id += 1;
4239 Some((funding_txo, ChannelMonitorUpdate {
4240 update_id: self.latest_monitor_update_id,
4241 updates: vec![ChannelMonitorUpdateStep::ChannelForceClosed { should_broadcast }],
4246 self.channel_state = ChannelState::ShutdownComplete as u32;
4247 self.update_time_counter += 1;
4248 (monitor_update, dropped_outbound_htlcs)
4252 fn is_unsupported_shutdown_script(their_features: &InitFeatures, script: &Script) -> bool {
4253 // We restrain shutdown scripts to standards forms to avoid transactions not propagating on the p2p tx-relay network
4255 // BOLT 2 says we must only send a scriptpubkey of certain standard forms,
4256 // which for a a BIP-141-compliant witness program is at max 42 bytes in length.
4257 // So don't let the remote peer feed us some super fee-heavy script.
4258 let is_script_too_long = script.len() > 42;
4259 if is_script_too_long {
4263 if their_features.supports_shutdown_anysegwit() && script.is_witness_program() && script.as_bytes()[0] != OP_PUSHBYTES_0.into_u8() {
4267 return !script.is_p2pkh() && !script.is_p2sh() && !script.is_v0_p2wpkh() && !script.is_v0_p2wsh()
4270 const SERIALIZATION_VERSION: u8 = 1;
4271 const MIN_SERIALIZATION_VERSION: u8 = 1;
4273 impl Writeable for InboundHTLCRemovalReason {
4274 fn write<W: Writer>(&self, writer: &mut W) -> Result<(), ::std::io::Error> {
4276 &InboundHTLCRemovalReason::FailRelay(ref error_packet) => {
4278 error_packet.write(writer)?;
4280 &InboundHTLCRemovalReason::FailMalformed((ref onion_hash, ref err_code)) => {
4282 onion_hash.write(writer)?;
4283 err_code.write(writer)?;
4285 &InboundHTLCRemovalReason::Fulfill(ref payment_preimage) => {
4287 payment_preimage.write(writer)?;
4294 impl Readable for InboundHTLCRemovalReason {
4295 fn read<R: ::std::io::Read>(reader: &mut R) -> Result<Self, DecodeError> {
4296 Ok(match <u8 as Readable>::read(reader)? {
4297 0 => InboundHTLCRemovalReason::FailRelay(Readable::read(reader)?),
4298 1 => InboundHTLCRemovalReason::FailMalformed((Readable::read(reader)?, Readable::read(reader)?)),
4299 2 => InboundHTLCRemovalReason::Fulfill(Readable::read(reader)?),
4300 _ => return Err(DecodeError::InvalidValue),
4305 impl<Signer: Sign> Writeable for Channel<Signer> {
4306 fn write<W: Writer>(&self, writer: &mut W) -> Result<(), ::std::io::Error> {
4307 // Note that we write out as if remove_uncommitted_htlcs_and_mark_paused had just been
4308 // called but include holding cell updates (and obviously we don't modify self).
4310 writer.write_all(&[SERIALIZATION_VERSION; 1])?;
4311 writer.write_all(&[MIN_SERIALIZATION_VERSION; 1])?;
4313 self.user_id.write(writer)?;
4314 self.config.write(writer)?;
4316 self.channel_id.write(writer)?;
4317 (self.channel_state | ChannelState::PeerDisconnected as u32).write(writer)?;
4318 self.channel_value_satoshis.write(writer)?;
4320 self.latest_monitor_update_id.write(writer)?;
4322 let mut key_data = VecWriter(Vec::new());
4323 self.holder_signer.write(&mut key_data)?;
4324 assert!(key_data.0.len() < std::usize::MAX);
4325 assert!(key_data.0.len() < std::u32::MAX as usize);
4326 (key_data.0.len() as u32).write(writer)?;
4327 writer.write_all(&key_data.0[..])?;
4329 self.shutdown_pubkey.write(writer)?;
4330 self.destination_script.write(writer)?;
4332 self.cur_holder_commitment_transaction_number.write(writer)?;
4333 self.cur_counterparty_commitment_transaction_number.write(writer)?;
4334 self.value_to_self_msat.write(writer)?;
4336 let mut dropped_inbound_htlcs = 0;
4337 for htlc in self.pending_inbound_htlcs.iter() {
4338 if let InboundHTLCState::RemoteAnnounced(_) = htlc.state {
4339 dropped_inbound_htlcs += 1;
4342 (self.pending_inbound_htlcs.len() as u64 - dropped_inbound_htlcs).write(writer)?;
4343 for htlc in self.pending_inbound_htlcs.iter() {
4344 if let &InboundHTLCState::RemoteAnnounced(_) = &htlc.state {
4347 htlc.htlc_id.write(writer)?;
4348 htlc.amount_msat.write(writer)?;
4349 htlc.cltv_expiry.write(writer)?;
4350 htlc.payment_hash.write(writer)?;
4352 &InboundHTLCState::RemoteAnnounced(_) => unreachable!(),
4353 &InboundHTLCState::AwaitingRemoteRevokeToAnnounce(ref htlc_state) => {
4355 htlc_state.write(writer)?;
4357 &InboundHTLCState::AwaitingAnnouncedRemoteRevoke(ref htlc_state) => {
4359 htlc_state.write(writer)?;
4361 &InboundHTLCState::Committed => {
4364 &InboundHTLCState::LocalRemoved(ref removal_reason) => {
4366 removal_reason.write(writer)?;
4371 (self.pending_outbound_htlcs.len() as u64).write(writer)?;
4372 for htlc in self.pending_outbound_htlcs.iter() {
4373 htlc.htlc_id.write(writer)?;
4374 htlc.amount_msat.write(writer)?;
4375 htlc.cltv_expiry.write(writer)?;
4376 htlc.payment_hash.write(writer)?;
4377 htlc.source.write(writer)?;
4379 &OutboundHTLCState::LocalAnnounced(ref onion_packet) => {
4381 onion_packet.write(writer)?;
4383 &OutboundHTLCState::Committed => {
4386 &OutboundHTLCState::RemoteRemoved(ref fail_reason) => {
4388 fail_reason.write(writer)?;
4390 &OutboundHTLCState::AwaitingRemoteRevokeToRemove(ref fail_reason) => {
4392 fail_reason.write(writer)?;
4394 &OutboundHTLCState::AwaitingRemovedRemoteRevoke(ref fail_reason) => {
4396 fail_reason.write(writer)?;
4401 (self.holding_cell_htlc_updates.len() as u64).write(writer)?;
4402 for update in self.holding_cell_htlc_updates.iter() {
4404 &HTLCUpdateAwaitingACK::AddHTLC { ref amount_msat, ref cltv_expiry, ref payment_hash, ref source, ref onion_routing_packet } => {
4406 amount_msat.write(writer)?;
4407 cltv_expiry.write(writer)?;
4408 payment_hash.write(writer)?;
4409 source.write(writer)?;
4410 onion_routing_packet.write(writer)?;
4412 &HTLCUpdateAwaitingACK::ClaimHTLC { ref payment_preimage, ref htlc_id } => {
4414 payment_preimage.write(writer)?;
4415 htlc_id.write(writer)?;
4417 &HTLCUpdateAwaitingACK::FailHTLC { ref htlc_id, ref err_packet } => {
4419 htlc_id.write(writer)?;
4420 err_packet.write(writer)?;
4425 match self.resend_order {
4426 RAACommitmentOrder::CommitmentFirst => 0u8.write(writer)?,
4427 RAACommitmentOrder::RevokeAndACKFirst => 1u8.write(writer)?,
4430 self.monitor_pending_funding_locked.write(writer)?;
4431 self.monitor_pending_revoke_and_ack.write(writer)?;
4432 self.monitor_pending_commitment_signed.write(writer)?;
4434 (self.monitor_pending_forwards.len() as u64).write(writer)?;
4435 for &(ref pending_forward, ref htlc_id) in self.monitor_pending_forwards.iter() {
4436 pending_forward.write(writer)?;
4437 htlc_id.write(writer)?;
4440 (self.monitor_pending_failures.len() as u64).write(writer)?;
4441 for &(ref htlc_source, ref payment_hash, ref fail_reason) in self.monitor_pending_failures.iter() {
4442 htlc_source.write(writer)?;
4443 payment_hash.write(writer)?;
4444 fail_reason.write(writer)?;
4447 self.pending_update_fee.write(writer)?;
4448 self.holding_cell_update_fee.write(writer)?;
4450 self.next_holder_htlc_id.write(writer)?;
4451 (self.next_counterparty_htlc_id - dropped_inbound_htlcs).write(writer)?;
4452 self.update_time_counter.write(writer)?;
4453 self.feerate_per_kw.write(writer)?;
4455 match self.last_sent_closing_fee {
4456 Some((feerate, fee, sig)) => {
4458 feerate.write(writer)?;
4462 None => 0u8.write(writer)?,
4465 self.funding_tx_confirmed_in.write(writer)?;
4466 self.short_channel_id.write(writer)?;
4467 self.funding_tx_confirmations.write(writer)?;
4469 self.counterparty_dust_limit_satoshis.write(writer)?;
4470 self.holder_dust_limit_satoshis.write(writer)?;
4471 self.counterparty_max_htlc_value_in_flight_msat.write(writer)?;
4472 self.counterparty_selected_channel_reserve_satoshis.write(writer)?;
4473 self.counterparty_htlc_minimum_msat.write(writer)?;
4474 self.holder_htlc_minimum_msat.write(writer)?;
4475 self.counterparty_max_accepted_htlcs.write(writer)?;
4476 self.minimum_depth.write(writer)?;
4478 match &self.counterparty_forwarding_info {
4481 info.fee_base_msat.write(writer)?;
4482 info.fee_proportional_millionths.write(writer)?;
4483 info.cltv_expiry_delta.write(writer)?;
4485 None => 0u8.write(writer)?
4488 self.channel_transaction_parameters.write(writer)?;
4489 self.counterparty_cur_commitment_point.write(writer)?;
4491 self.counterparty_prev_commitment_point.write(writer)?;
4492 self.counterparty_node_id.write(writer)?;
4494 self.counterparty_shutdown_scriptpubkey.write(writer)?;
4496 self.commitment_secrets.write(writer)?;
4501 const MAX_ALLOC_SIZE: usize = 64*1024;
4502 impl<'a, Signer: Sign, K: Deref> ReadableArgs<&'a K> for Channel<Signer>
4503 where K::Target: KeysInterface<Signer = Signer> {
4504 fn read<R : ::std::io::Read>(reader: &mut R, keys_source: &'a K) -> Result<Self, DecodeError> {
4505 let _ver: u8 = Readable::read(reader)?;
4506 let min_ver: u8 = Readable::read(reader)?;
4507 if min_ver > SERIALIZATION_VERSION {
4508 return Err(DecodeError::UnknownVersion);
4511 let user_id = Readable::read(reader)?;
4512 let config: ChannelConfig = Readable::read(reader)?;
4514 let channel_id = Readable::read(reader)?;
4515 let channel_state = Readable::read(reader)?;
4516 let channel_value_satoshis = Readable::read(reader)?;
4518 let latest_monitor_update_id = Readable::read(reader)?;
4520 let keys_len: u32 = Readable::read(reader)?;
4521 let mut keys_data = Vec::with_capacity(cmp::min(keys_len as usize, MAX_ALLOC_SIZE));
4522 while keys_data.len() != keys_len as usize {
4523 // Read 1KB at a time to avoid accidentally allocating 4GB on corrupted channel keys
4524 let mut data = [0; 1024];
4525 let read_slice = &mut data[0..cmp::min(1024, keys_len as usize - keys_data.len())];
4526 reader.read_exact(read_slice)?;
4527 keys_data.extend_from_slice(read_slice);
4529 let holder_signer = keys_source.read_chan_signer(&keys_data)?;
4531 let shutdown_pubkey = Readable::read(reader)?;
4532 let destination_script = Readable::read(reader)?;
4534 let cur_holder_commitment_transaction_number = Readable::read(reader)?;
4535 let cur_counterparty_commitment_transaction_number = Readable::read(reader)?;
4536 let value_to_self_msat = Readable::read(reader)?;
4538 let pending_inbound_htlc_count: u64 = Readable::read(reader)?;
4539 let mut pending_inbound_htlcs = Vec::with_capacity(cmp::min(pending_inbound_htlc_count as usize, OUR_MAX_HTLCS as usize));
4540 for _ in 0..pending_inbound_htlc_count {
4541 pending_inbound_htlcs.push(InboundHTLCOutput {
4542 htlc_id: Readable::read(reader)?,
4543 amount_msat: Readable::read(reader)?,
4544 cltv_expiry: Readable::read(reader)?,
4545 payment_hash: Readable::read(reader)?,
4546 state: match <u8 as Readable>::read(reader)? {
4547 1 => InboundHTLCState::AwaitingRemoteRevokeToAnnounce(Readable::read(reader)?),
4548 2 => InboundHTLCState::AwaitingAnnouncedRemoteRevoke(Readable::read(reader)?),
4549 3 => InboundHTLCState::Committed,
4550 4 => InboundHTLCState::LocalRemoved(Readable::read(reader)?),
4551 _ => return Err(DecodeError::InvalidValue),
4556 let pending_outbound_htlc_count: u64 = Readable::read(reader)?;
4557 let mut pending_outbound_htlcs = Vec::with_capacity(cmp::min(pending_outbound_htlc_count as usize, OUR_MAX_HTLCS as usize));
4558 for _ in 0..pending_outbound_htlc_count {
4559 pending_outbound_htlcs.push(OutboundHTLCOutput {
4560 htlc_id: Readable::read(reader)?,
4561 amount_msat: Readable::read(reader)?,
4562 cltv_expiry: Readable::read(reader)?,
4563 payment_hash: Readable::read(reader)?,
4564 source: Readable::read(reader)?,
4565 state: match <u8 as Readable>::read(reader)? {
4566 0 => OutboundHTLCState::LocalAnnounced(Box::new(Readable::read(reader)?)),
4567 1 => OutboundHTLCState::Committed,
4568 2 => OutboundHTLCState::RemoteRemoved(Readable::read(reader)?),
4569 3 => OutboundHTLCState::AwaitingRemoteRevokeToRemove(Readable::read(reader)?),
4570 4 => OutboundHTLCState::AwaitingRemovedRemoteRevoke(Readable::read(reader)?),
4571 _ => return Err(DecodeError::InvalidValue),
4576 let holding_cell_htlc_update_count: u64 = Readable::read(reader)?;
4577 let mut holding_cell_htlc_updates = Vec::with_capacity(cmp::min(holding_cell_htlc_update_count as usize, OUR_MAX_HTLCS as usize*2));
4578 for _ in 0..holding_cell_htlc_update_count {
4579 holding_cell_htlc_updates.push(match <u8 as Readable>::read(reader)? {
4580 0 => HTLCUpdateAwaitingACK::AddHTLC {
4581 amount_msat: Readable::read(reader)?,
4582 cltv_expiry: Readable::read(reader)?,
4583 payment_hash: Readable::read(reader)?,
4584 source: Readable::read(reader)?,
4585 onion_routing_packet: Readable::read(reader)?,
4587 1 => HTLCUpdateAwaitingACK::ClaimHTLC {
4588 payment_preimage: Readable::read(reader)?,
4589 htlc_id: Readable::read(reader)?,
4591 2 => HTLCUpdateAwaitingACK::FailHTLC {
4592 htlc_id: Readable::read(reader)?,
4593 err_packet: Readable::read(reader)?,
4595 _ => return Err(DecodeError::InvalidValue),
4599 let resend_order = match <u8 as Readable>::read(reader)? {
4600 0 => RAACommitmentOrder::CommitmentFirst,
4601 1 => RAACommitmentOrder::RevokeAndACKFirst,
4602 _ => return Err(DecodeError::InvalidValue),
4605 let monitor_pending_funding_locked = Readable::read(reader)?;
4606 let monitor_pending_revoke_and_ack = Readable::read(reader)?;
4607 let monitor_pending_commitment_signed = Readable::read(reader)?;
4609 let monitor_pending_forwards_count: u64 = Readable::read(reader)?;
4610 let mut monitor_pending_forwards = Vec::with_capacity(cmp::min(monitor_pending_forwards_count as usize, OUR_MAX_HTLCS as usize));
4611 for _ in 0..monitor_pending_forwards_count {
4612 monitor_pending_forwards.push((Readable::read(reader)?, Readable::read(reader)?));
4615 let monitor_pending_failures_count: u64 = Readable::read(reader)?;
4616 let mut monitor_pending_failures = Vec::with_capacity(cmp::min(monitor_pending_failures_count as usize, OUR_MAX_HTLCS as usize));
4617 for _ in 0..monitor_pending_failures_count {
4618 monitor_pending_failures.push((Readable::read(reader)?, Readable::read(reader)?, Readable::read(reader)?));
4621 let pending_update_fee = Readable::read(reader)?;
4622 let holding_cell_update_fee = Readable::read(reader)?;
4624 let next_holder_htlc_id = Readable::read(reader)?;
4625 let next_counterparty_htlc_id = Readable::read(reader)?;
4626 let update_time_counter = Readable::read(reader)?;
4627 let feerate_per_kw = Readable::read(reader)?;
4629 let last_sent_closing_fee = match <u8 as Readable>::read(reader)? {
4631 1 => Some((Readable::read(reader)?, Readable::read(reader)?, Readable::read(reader)?)),
4632 _ => return Err(DecodeError::InvalidValue),
4635 let funding_tx_confirmed_in = Readable::read(reader)?;
4636 let short_channel_id = Readable::read(reader)?;
4637 let funding_tx_confirmations = Readable::read(reader)?;
4639 let counterparty_dust_limit_satoshis = Readable::read(reader)?;
4640 let holder_dust_limit_satoshis = Readable::read(reader)?;
4641 let counterparty_max_htlc_value_in_flight_msat = Readable::read(reader)?;
4642 let counterparty_selected_channel_reserve_satoshis = Readable::read(reader)?;
4643 let counterparty_htlc_minimum_msat = Readable::read(reader)?;
4644 let holder_htlc_minimum_msat = Readable::read(reader)?;
4645 let counterparty_max_accepted_htlcs = Readable::read(reader)?;
4646 let minimum_depth = Readable::read(reader)?;
4648 let counterparty_forwarding_info = match <u8 as Readable>::read(reader)? {
4650 1 => Some(CounterpartyForwardingInfo {
4651 fee_base_msat: Readable::read(reader)?,
4652 fee_proportional_millionths: Readable::read(reader)?,
4653 cltv_expiry_delta: Readable::read(reader)?,
4655 _ => return Err(DecodeError::InvalidValue),
4658 let channel_parameters = Readable::read(reader)?;
4659 let counterparty_cur_commitment_point = Readable::read(reader)?;
4661 let counterparty_prev_commitment_point = Readable::read(reader)?;
4662 let counterparty_node_id = Readable::read(reader)?;
4664 let counterparty_shutdown_scriptpubkey = Readable::read(reader)?;
4665 let commitment_secrets = Readable::read(reader)?;
4667 let mut secp_ctx = Secp256k1::new();
4668 secp_ctx.seeded_randomize(&keys_source.get_secure_random_bytes());
4677 channel_value_satoshis,
4679 latest_monitor_update_id,
4685 cur_holder_commitment_transaction_number,
4686 cur_counterparty_commitment_transaction_number,
4689 pending_inbound_htlcs,
4690 pending_outbound_htlcs,
4691 holding_cell_htlc_updates,
4695 monitor_pending_funding_locked,
4696 monitor_pending_revoke_and_ack,
4697 monitor_pending_commitment_signed,
4698 monitor_pending_forwards,
4699 monitor_pending_failures,
4702 holding_cell_update_fee,
4703 next_holder_htlc_id,
4704 next_counterparty_htlc_id,
4705 update_time_counter,
4708 #[cfg(debug_assertions)]
4709 holder_max_commitment_tx_output: ::std::sync::Mutex::new((0, 0)),
4710 #[cfg(debug_assertions)]
4711 counterparty_max_commitment_tx_output: ::std::sync::Mutex::new((0, 0)),
4713 last_sent_closing_fee,
4715 funding_tx_confirmed_in,
4717 funding_tx_confirmations,
4719 counterparty_dust_limit_satoshis,
4720 holder_dust_limit_satoshis,
4721 counterparty_max_htlc_value_in_flight_msat,
4722 counterparty_selected_channel_reserve_satoshis,
4723 counterparty_htlc_minimum_msat,
4724 holder_htlc_minimum_msat,
4725 counterparty_max_accepted_htlcs,
4728 counterparty_forwarding_info,
4730 channel_transaction_parameters: channel_parameters,
4731 counterparty_cur_commitment_point,
4733 counterparty_prev_commitment_point,
4734 counterparty_node_id,
4736 counterparty_shutdown_scriptpubkey,
4740 network_sync: UpdateStatus::Fresh,
4742 #[cfg(any(test, feature = "fuzztarget"))]
4743 next_local_commitment_tx_fee_info_cached: Mutex::new(None),
4744 #[cfg(any(test, feature = "fuzztarget"))]
4745 next_remote_commitment_tx_fee_info_cached: Mutex::new(None),
4752 use bitcoin::util::bip143;
4753 use bitcoin::consensus::encode::serialize;
4754 use bitcoin::blockdata::script::{Script, Builder};
4755 use bitcoin::blockdata::transaction::{Transaction, TxOut, SigHashType};
4756 use bitcoin::blockdata::constants::genesis_block;
4757 use bitcoin::blockdata::opcodes;
4758 use bitcoin::network::constants::Network;
4759 use bitcoin::hashes::hex::FromHex;
4761 use ln::channelmanager::{HTLCSource, PaymentPreimage, PaymentHash};
4762 use ln::channel::{Channel,Sign,InboundHTLCOutput,OutboundHTLCOutput,InboundHTLCState,OutboundHTLCState,HTLCOutputInCommitment,HTLCCandidate,HTLCInitiator,TxCreationKeys};
4763 use ln::channel::MAX_FUNDING_SATOSHIS;
4764 use ln::features::InitFeatures;
4765 use ln::msgs::{ChannelUpdate, DataLossProtect, DecodeError, OptionalField, UnsignedChannelUpdate};
4767 use ln::chan_utils::{ChannelPublicKeys, HolderCommitmentTransaction, CounterpartyChannelTransactionParameters, HTLC_SUCCESS_TX_WEIGHT, HTLC_TIMEOUT_TX_WEIGHT};
4768 use chain::chaininterface::{FeeEstimator,ConfirmationTarget};
4769 use chain::keysinterface::{InMemorySigner, KeysInterface};
4770 use chain::transaction::OutPoint;
4771 use util::config::UserConfig;
4772 use util::enforcing_trait_impls::EnforcingSigner;
4773 use util::test_utils;
4774 use util::logger::Logger;
4775 use bitcoin::secp256k1::{Secp256k1, Message, Signature, All};
4776 use bitcoin::secp256k1::ffi::Signature as FFISignature;
4777 use bitcoin::secp256k1::key::{SecretKey,PublicKey};
4778 use bitcoin::hashes::sha256::Hash as Sha256;
4779 use bitcoin::hashes::Hash;
4780 use bitcoin::hash_types::{Txid, WPubkeyHash};
4783 struct TestFeeEstimator {
4786 impl FeeEstimator for TestFeeEstimator {
4787 fn get_est_sat_per_1000_weight(&self, _: ConfirmationTarget) -> u32 {
4793 fn test_max_funding_satoshis() {
4794 assert!(MAX_FUNDING_SATOSHIS <= 21_000_000 * 100_000_000,
4795 "MAX_FUNDING_SATOSHIS is greater than all satoshis in existence");
4799 signer: InMemorySigner,
4801 impl KeysInterface for Keys {
4802 type Signer = InMemorySigner;
4804 fn get_node_secret(&self) -> SecretKey { panic!(); }
4805 fn get_destination_script(&self) -> Script {
4806 let secp_ctx = Secp256k1::signing_only();
4807 let channel_monitor_claim_key = SecretKey::from_slice(&hex::decode("0fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff").unwrap()[..]).unwrap();
4808 let channel_monitor_claim_key_hash = WPubkeyHash::hash(&PublicKey::from_secret_key(&secp_ctx, &channel_monitor_claim_key).serialize());
4809 Builder::new().push_opcode(opcodes::all::OP_PUSHBYTES_0).push_slice(&channel_monitor_claim_key_hash[..]).into_script()
4812 fn get_shutdown_pubkey(&self) -> PublicKey {
4813 let secp_ctx = Secp256k1::signing_only();
4814 let channel_close_key = SecretKey::from_slice(&hex::decode("0fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff").unwrap()[..]).unwrap();
4815 PublicKey::from_secret_key(&secp_ctx, &channel_close_key)
4818 fn get_channel_signer(&self, _inbound: bool, _channel_value_satoshis: u64) -> InMemorySigner {
4821 fn get_secure_random_bytes(&self) -> [u8; 32] { [0; 32] }
4822 fn read_chan_signer(&self, _data: &[u8]) -> Result<Self::Signer, DecodeError> { panic!(); }
4825 fn public_from_secret_hex(secp_ctx: &Secp256k1<All>, hex: &str) -> PublicKey {
4826 PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&hex::decode(hex).unwrap()[..]).unwrap())
4829 // Check that, during channel creation, we use the same feerate in the open channel message
4830 // as we do in the Channel object creation itself.
4832 fn test_open_channel_msg_fee() {
4833 let original_fee = 253;
4834 let mut fee_est = TestFeeEstimator{fee_est: original_fee };
4835 let secp_ctx = Secp256k1::new();
4836 let seed = [42; 32];
4837 let network = Network::Testnet;
4838 let keys_provider = test_utils::TestKeysInterface::new(&seed, network);
4840 let node_a_node_id = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[42; 32]).unwrap());
4841 let config = UserConfig::default();
4842 let node_a_chan = Channel::<EnforcingSigner>::new_outbound(&&fee_est, &&keys_provider, node_a_node_id, 10000000, 100000, 42, &config).unwrap();
4844 // Now change the fee so we can check that the fee in the open_channel message is the
4845 // same as the old fee.
4846 fee_est.fee_est = 500;
4847 let open_channel_msg = node_a_chan.get_open_channel(genesis_block(network).header.block_hash());
4848 assert_eq!(open_channel_msg.feerate_per_kw, original_fee);
4852 fn test_holder_vs_counterparty_dust_limit() {
4853 // Test that when calculating the local and remote commitment transaction fees, the correct
4854 // dust limits are used.
4855 let feeest = TestFeeEstimator{fee_est: 15000};
4856 let secp_ctx = Secp256k1::new();
4857 let seed = [42; 32];
4858 let network = Network::Testnet;
4859 let keys_provider = test_utils::TestKeysInterface::new(&seed, network);
4861 // Go through the flow of opening a channel between two nodes, making sure
4862 // they have different dust limits.
4864 // Create Node A's channel pointing to Node B's pubkey
4865 let node_b_node_id = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[42; 32]).unwrap());
4866 let config = UserConfig::default();
4867 let mut node_a_chan = Channel::<EnforcingSigner>::new_outbound(&&feeest, &&keys_provider, node_b_node_id, 10000000, 100000, 42, &config).unwrap();
4869 // Create Node B's channel by receiving Node A's open_channel message
4870 // Make sure A's dust limit is as we expect.
4871 let open_channel_msg = node_a_chan.get_open_channel(genesis_block(network).header.block_hash());
4872 assert_eq!(open_channel_msg.dust_limit_satoshis, 1560);
4873 let node_b_node_id = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[7; 32]).unwrap());
4874 let node_b_chan = Channel::<EnforcingSigner>::new_from_req(&&feeest, &&keys_provider, node_b_node_id, InitFeatures::known(), &open_channel_msg, 7, &config).unwrap();
4876 // Node B --> Node A: accept channel, explicitly setting B's dust limit.
4877 let mut accept_channel_msg = node_b_chan.get_accept_channel();
4878 accept_channel_msg.dust_limit_satoshis = 546;
4879 node_a_chan.accept_channel(&accept_channel_msg, &config, InitFeatures::known()).unwrap();
4881 // Put some inbound and outbound HTLCs in A's channel.
4882 let htlc_amount_msat = 11_092_000; // put an amount below A's effective dust limit but above B's.
4883 node_a_chan.pending_inbound_htlcs.push(InboundHTLCOutput {
4885 amount_msat: htlc_amount_msat,
4886 payment_hash: PaymentHash(Sha256::hash(&[42; 32]).into_inner()),
4887 cltv_expiry: 300000000,
4888 state: InboundHTLCState::Committed,
4891 node_a_chan.pending_outbound_htlcs.push(OutboundHTLCOutput {
4893 amount_msat: htlc_amount_msat, // put an amount below A's dust amount but above B's.
4894 payment_hash: PaymentHash(Sha256::hash(&[43; 32]).into_inner()),
4895 cltv_expiry: 200000000,
4896 state: OutboundHTLCState::Committed,
4897 source: HTLCSource::OutboundRoute {
4899 session_priv: SecretKey::from_slice(&hex::decode("0fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff").unwrap()[..]).unwrap(),
4900 first_hop_htlc_msat: 548,
4904 // Make sure when Node A calculates their local commitment transaction, none of the HTLCs pass
4905 // the dust limit check.
4906 let htlc_candidate = HTLCCandidate::new(htlc_amount_msat, HTLCInitiator::LocalOffered);
4907 let local_commit_tx_fee = node_a_chan.next_local_commit_tx_fee_msat(htlc_candidate, None);
4908 let local_commit_fee_0_htlcs = node_a_chan.commit_tx_fee_msat(0);
4909 assert_eq!(local_commit_tx_fee, local_commit_fee_0_htlcs);
4911 // Finally, make sure that when Node A calculates the remote's commitment transaction fees, all
4912 // of the HTLCs are seen to be above the dust limit.
4913 node_a_chan.channel_transaction_parameters.is_outbound_from_holder = false;
4914 let remote_commit_fee_3_htlcs = node_a_chan.commit_tx_fee_msat(3);
4915 let htlc_candidate = HTLCCandidate::new(htlc_amount_msat, HTLCInitiator::LocalOffered);
4916 let remote_commit_tx_fee = node_a_chan.next_remote_commit_tx_fee_msat(htlc_candidate, None);
4917 assert_eq!(remote_commit_tx_fee, remote_commit_fee_3_htlcs);
4921 fn test_timeout_vs_success_htlc_dust_limit() {
4922 // Make sure that when `next_remote_commit_tx_fee_msat` and `next_local_commit_tx_fee_msat`
4923 // calculate the real dust limits for HTLCs (i.e. the dust limit given by the counterparty
4924 // *plus* the fees paid for the HTLC) they don't swap `HTLC_SUCCESS_TX_WEIGHT` for
4925 // `HTLC_TIMEOUT_TX_WEIGHT`, and vice versa.
4926 let fee_est = TestFeeEstimator{fee_est: 253 };
4927 let secp_ctx = Secp256k1::new();
4928 let seed = [42; 32];
4929 let network = Network::Testnet;
4930 let keys_provider = test_utils::TestKeysInterface::new(&seed, network);
4932 let node_id = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[42; 32]).unwrap());
4933 let config = UserConfig::default();
4934 let mut chan = Channel::<EnforcingSigner>::new_outbound(&&fee_est, &&keys_provider, node_id, 10000000, 100000, 42, &config).unwrap();
4936 let commitment_tx_fee_0_htlcs = chan.commit_tx_fee_msat(0);
4937 let commitment_tx_fee_1_htlc = chan.commit_tx_fee_msat(1);
4939 // If HTLC_SUCCESS_TX_WEIGHT and HTLC_TIMEOUT_TX_WEIGHT were swapped: then this HTLC would be
4940 // counted as dust when it shouldn't be.
4941 let htlc_amt_above_timeout = ((253 * HTLC_TIMEOUT_TX_WEIGHT / 1000) + chan.holder_dust_limit_satoshis + 1) * 1000;
4942 let htlc_candidate = HTLCCandidate::new(htlc_amt_above_timeout, HTLCInitiator::LocalOffered);
4943 let commitment_tx_fee = chan.next_local_commit_tx_fee_msat(htlc_candidate, None);
4944 assert_eq!(commitment_tx_fee, commitment_tx_fee_1_htlc);
4946 // If swapped: this HTLC would be counted as non-dust when it shouldn't be.
4947 let dust_htlc_amt_below_success = ((253 * HTLC_SUCCESS_TX_WEIGHT / 1000) + chan.holder_dust_limit_satoshis - 1) * 1000;
4948 let htlc_candidate = HTLCCandidate::new(dust_htlc_amt_below_success, HTLCInitiator::RemoteOffered);
4949 let commitment_tx_fee = chan.next_local_commit_tx_fee_msat(htlc_candidate, None);
4950 assert_eq!(commitment_tx_fee, commitment_tx_fee_0_htlcs);
4952 chan.channel_transaction_parameters.is_outbound_from_holder = false;
4954 // If swapped: this HTLC would be counted as non-dust when it shouldn't be.
4955 let dust_htlc_amt_above_timeout = ((253 * HTLC_TIMEOUT_TX_WEIGHT / 1000) + chan.counterparty_dust_limit_satoshis + 1) * 1000;
4956 let htlc_candidate = HTLCCandidate::new(dust_htlc_amt_above_timeout, HTLCInitiator::LocalOffered);
4957 let commitment_tx_fee = chan.next_remote_commit_tx_fee_msat(htlc_candidate, None);
4958 assert_eq!(commitment_tx_fee, commitment_tx_fee_0_htlcs);
4960 // If swapped: this HTLC would be counted as dust when it shouldn't be.
4961 let htlc_amt_below_success = ((253 * HTLC_SUCCESS_TX_WEIGHT / 1000) + chan.counterparty_dust_limit_satoshis - 1) * 1000;
4962 let htlc_candidate = HTLCCandidate::new(htlc_amt_below_success, HTLCInitiator::RemoteOffered);
4963 let commitment_tx_fee = chan.next_remote_commit_tx_fee_msat(htlc_candidate, None);
4964 assert_eq!(commitment_tx_fee, commitment_tx_fee_1_htlc);
4968 fn channel_reestablish_no_updates() {
4969 let feeest = TestFeeEstimator{fee_est: 15000};
4970 let logger = test_utils::TestLogger::new();
4971 let secp_ctx = Secp256k1::new();
4972 let seed = [42; 32];
4973 let network = Network::Testnet;
4974 let chain_hash = genesis_block(network).header.block_hash();
4975 let last_block_hash = chain_hash;
4976 let keys_provider = test_utils::TestKeysInterface::new(&seed, network);
4978 // Go through the flow of opening a channel between two nodes.
4980 // Create Node A's channel pointing to Node B's pubkey
4981 let node_b_node_id = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[42; 32]).unwrap());
4982 let config = UserConfig::default();
4983 let mut node_a_chan = Channel::<EnforcingSigner>::new_outbound(&&feeest, &&keys_provider, node_b_node_id, 10000000, 100000, 42, &config).unwrap();
4985 // Create Node B's channel by receiving Node A's open_channel message
4986 let open_channel_msg = node_a_chan.get_open_channel(chain_hash);
4987 let node_b_node_id = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[7; 32]).unwrap());
4988 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();
4990 // Node B --> Node A: accept channel
4991 let accept_channel_msg = node_b_chan.get_accept_channel();
4992 node_a_chan.accept_channel(&accept_channel_msg, &config, InitFeatures::known()).unwrap();
4994 // Node A --> Node B: funding created
4995 let output_script = node_a_chan.get_funding_redeemscript();
4996 let tx = Transaction { version: 1, lock_time: 0, input: Vec::new(), output: vec![TxOut {
4997 value: 10000000, script_pubkey: output_script.clone(),
4999 let funding_outpoint = OutPoint{ txid: tx.txid(), index: 0 };
5000 let funding_created_msg = node_a_chan.get_outbound_funding_created(funding_outpoint, &&logger).unwrap();
5001 let (funding_signed_msg, _) = node_b_chan.funding_created(&funding_created_msg, last_block_hash, &&logger).unwrap();
5003 // Node B --> Node A: funding signed
5004 let _ = node_a_chan.funding_signed(&funding_signed_msg, last_block_hash, &&logger);
5006 // Now disconnect the two nodes and check that the commitment point in
5007 // Node B's channel_reestablish message is sane.
5008 node_b_chan.remove_uncommitted_htlcs_and_mark_paused(&&logger);
5009 let msg = node_b_chan.get_channel_reestablish(&&logger);
5010 assert_eq!(msg.next_local_commitment_number, 1); // now called next_commitment_number
5011 assert_eq!(msg.next_remote_commitment_number, 0); // now called next_revocation_number
5012 match msg.data_loss_protect {
5013 OptionalField::Present(DataLossProtect { your_last_per_commitment_secret, .. }) => {
5014 assert_eq!(your_last_per_commitment_secret, [0; 32]);
5019 // Check that the commitment point in Node A's channel_reestablish message
5021 node_a_chan.remove_uncommitted_htlcs_and_mark_paused(&&logger);
5022 let msg = node_a_chan.get_channel_reestablish(&&logger);
5023 assert_eq!(msg.next_local_commitment_number, 1); // now called next_commitment_number
5024 assert_eq!(msg.next_remote_commitment_number, 0); // now called next_revocation_number
5025 match msg.data_loss_protect {
5026 OptionalField::Present(DataLossProtect { your_last_per_commitment_secret, .. }) => {
5027 assert_eq!(your_last_per_commitment_secret, [0; 32]);
5034 fn channel_update() {
5035 let feeest = TestFeeEstimator{fee_est: 15000};
5036 let secp_ctx = Secp256k1::new();
5037 let seed = [42; 32];
5038 let network = Network::Testnet;
5039 let chain_hash = genesis_block(network).header.block_hash();
5040 let keys_provider = test_utils::TestKeysInterface::new(&seed, network);
5042 // Create a channel.
5043 let node_b_node_id = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[42; 32]).unwrap());
5044 let config = UserConfig::default();
5045 let mut node_a_chan = Channel::<EnforcingSigner>::new_outbound(&&feeest, &&keys_provider, node_b_node_id, 10000000, 100000, 42, &config).unwrap();
5046 assert!(node_a_chan.counterparty_forwarding_info.is_none());
5047 assert_eq!(node_a_chan.holder_htlc_minimum_msat, 1); // the default
5048 assert!(node_a_chan.counterparty_forwarding_info().is_none());
5050 // Make sure that receiving a channel update will update the Channel as expected.
5051 let update = ChannelUpdate {
5052 contents: UnsignedChannelUpdate {
5054 short_channel_id: 0,
5057 cltv_expiry_delta: 100,
5058 htlc_minimum_msat: 5,
5059 htlc_maximum_msat: OptionalField::Absent,
5061 fee_proportional_millionths: 11,
5062 excess_data: Vec::new(),
5064 signature: Signature::from(unsafe { FFISignature::new() })
5066 node_a_chan.channel_update(&update).unwrap();
5068 // The counterparty can send an update with a higher minimum HTLC, but that shouldn't
5069 // change our official htlc_minimum_msat.
5070 assert_eq!(node_a_chan.holder_htlc_minimum_msat, 1);
5071 match node_a_chan.counterparty_forwarding_info() {
5073 assert_eq!(info.cltv_expiry_delta, 100);
5074 assert_eq!(info.fee_base_msat, 110);
5075 assert_eq!(info.fee_proportional_millionths, 11);
5077 None => panic!("expected counterparty forwarding info to be Some")
5082 fn outbound_commitment_test() {
5083 // Test vectors from BOLT 3 Appendix C:
5084 let feeest = TestFeeEstimator{fee_est: 15000};
5085 let logger : Arc<Logger> = Arc::new(test_utils::TestLogger::new());
5086 let secp_ctx = Secp256k1::new();
5088 let mut signer = InMemorySigner::new(
5090 SecretKey::from_slice(&hex::decode("30ff4956bbdd3222d44cc5e8a1261dab1e07957bdac5ae88fe3261ef321f3749").unwrap()[..]).unwrap(),
5091 SecretKey::from_slice(&hex::decode("0fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff").unwrap()[..]).unwrap(),
5092 SecretKey::from_slice(&hex::decode("1111111111111111111111111111111111111111111111111111111111111111").unwrap()[..]).unwrap(),
5093 SecretKey::from_slice(&hex::decode("3333333333333333333333333333333333333333333333333333333333333333").unwrap()[..]).unwrap(),
5094 SecretKey::from_slice(&hex::decode("1111111111111111111111111111111111111111111111111111111111111111").unwrap()[..]).unwrap(),
5096 // These aren't set in the test vectors:
5097 [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],
5102 assert_eq!(signer.pubkeys().funding_pubkey.serialize()[..],
5103 hex::decode("023da092f6980e58d2c037173180e9a465476026ee50f96695963e8efe436f54eb").unwrap()[..]);
5104 let keys_provider = Keys { signer: signer.clone() };
5106 let counterparty_node_id = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[42; 32]).unwrap());
5107 let mut config = UserConfig::default();
5108 config.channel_options.announced_channel = false;
5109 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
5110 chan.holder_dust_limit_satoshis = 546;
5112 let funding_info = OutPoint{ txid: Txid::from_hex("8984484a580b825b9972d7adb15050b3ab624ccd731946b3eeddb92f4e7ef6be").unwrap(), index: 0 };
5114 let counterparty_pubkeys = ChannelPublicKeys {
5115 funding_pubkey: public_from_secret_hex(&secp_ctx, "1552dfba4f6cf29a62a0af13c8d6981d36d0ef8d61ba10fb0fe90da7634d7e13"),
5116 revocation_basepoint: PublicKey::from_slice(&hex::decode("02466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f27").unwrap()[..]).unwrap(),
5117 payment_point: public_from_secret_hex(&secp_ctx, "4444444444444444444444444444444444444444444444444444444444444444"),
5118 delayed_payment_basepoint: public_from_secret_hex(&secp_ctx, "1552dfba4f6cf29a62a0af13c8d6981d36d0ef8d61ba10fb0fe90da7634d7e13"),
5119 htlc_basepoint: public_from_secret_hex(&secp_ctx, "4444444444444444444444444444444444444444444444444444444444444444")
5121 chan.channel_transaction_parameters.counterparty_parameters = Some(
5122 CounterpartyChannelTransactionParameters {
5123 pubkeys: counterparty_pubkeys.clone(),
5124 selected_contest_delay: 144
5126 chan.channel_transaction_parameters.funding_outpoint = Some(funding_info);
5127 signer.ready_channel(&chan.channel_transaction_parameters);
5129 assert_eq!(counterparty_pubkeys.payment_point.serialize()[..],
5130 hex::decode("032c0b7cf95324a07d05398b240174dc0c2be444d96b159aa6c7f7b1e668680991").unwrap()[..]);
5132 assert_eq!(counterparty_pubkeys.funding_pubkey.serialize()[..],
5133 hex::decode("030e9f7b623d2ccc7c9bd44d66d5ce21ce504c0acf6385a132cec6d3c39fa711c1").unwrap()[..]);
5135 assert_eq!(counterparty_pubkeys.htlc_basepoint.serialize()[..],
5136 hex::decode("032c0b7cf95324a07d05398b240174dc0c2be444d96b159aa6c7f7b1e668680991").unwrap()[..]);
5138 // We can't just use build_holder_transaction_keys here as the per_commitment_secret is not
5139 // derived from a commitment_seed, so instead we copy it here and call
5140 // build_commitment_transaction.
5141 let delayed_payment_base = &chan.holder_signer.pubkeys().delayed_payment_basepoint;
5142 let per_commitment_secret = SecretKey::from_slice(&hex::decode("1f1e1d1c1b1a191817161514131211100f0e0d0c0b0a09080706050403020100").unwrap()[..]).unwrap();
5143 let per_commitment_point = PublicKey::from_secret_key(&secp_ctx, &per_commitment_secret);
5144 let htlc_basepoint = &chan.holder_signer.pubkeys().htlc_basepoint;
5145 let keys = TxCreationKeys::derive_new(&secp_ctx, &per_commitment_point, delayed_payment_base, htlc_basepoint, &counterparty_pubkeys.revocation_basepoint, &counterparty_pubkeys.htlc_basepoint).unwrap();
5147 macro_rules! test_commitment {
5148 ( $counterparty_sig_hex: expr, $sig_hex: expr, $tx_hex: expr, {
5149 $( { $htlc_idx: expr, $counterparty_htlc_sig_hex: expr, $htlc_sig_hex: expr, $htlc_tx_hex: expr } ), *
5151 let (commitment_tx, htlcs): (_, Vec<HTLCOutputInCommitment>) = {
5152 let mut res = chan.build_commitment_transaction(0xffffffffffff - 42, &keys, true, false, chan.feerate_per_kw, &logger);
5154 let htlcs = res.2.drain(..)
5155 .filter_map(|(htlc, _)| if htlc.transaction_output_index.is_some() { Some(htlc) } else { None })
5159 let trusted_tx = commitment_tx.trust();
5160 let unsigned_tx = trusted_tx.built_transaction();
5161 let redeemscript = chan.get_funding_redeemscript();
5162 let counterparty_signature = Signature::from_der(&hex::decode($counterparty_sig_hex).unwrap()[..]).unwrap();
5163 let sighash = unsigned_tx.get_sighash_all(&redeemscript, chan.channel_value_satoshis);
5164 secp_ctx.verify(&sighash, &counterparty_signature, chan.counterparty_funding_pubkey()).unwrap();
5166 let mut per_htlc: Vec<(HTLCOutputInCommitment, Option<Signature>)> = Vec::new();
5167 per_htlc.clear(); // Don't warn about excess mut for no-HTLC calls
5168 let mut counterparty_htlc_sigs = Vec::new();
5169 counterparty_htlc_sigs.clear(); // Don't warn about excess mut for no-HTLC calls
5171 let remote_signature = Signature::from_der(&hex::decode($counterparty_htlc_sig_hex).unwrap()[..]).unwrap();
5172 per_htlc.push((htlcs[$htlc_idx].clone(), Some(remote_signature)));
5173 counterparty_htlc_sigs.push(remote_signature);
5175 assert_eq!(htlcs.len(), per_htlc.len());
5177 let holder_commitment_tx = HolderCommitmentTransaction::new(
5178 commitment_tx.clone(),
5179 counterparty_signature,
5180 counterparty_htlc_sigs,
5181 &chan.holder_signer.pubkeys().funding_pubkey,
5182 chan.counterparty_funding_pubkey()
5184 let (holder_sig, htlc_sigs) = signer.sign_holder_commitment_and_htlcs(&holder_commitment_tx, &secp_ctx).unwrap();
5185 assert_eq!(Signature::from_der(&hex::decode($sig_hex).unwrap()[..]).unwrap(), holder_sig, "holder_sig");
5187 let funding_redeemscript = chan.get_funding_redeemscript();
5188 let tx = holder_commitment_tx.add_holder_sig(&funding_redeemscript, holder_sig);
5189 assert_eq!(serialize(&tx)[..], hex::decode($tx_hex).unwrap()[..], "tx");
5191 // ((htlc, counterparty_sig), (index, holder_sig))
5192 let mut htlc_sig_iter = holder_commitment_tx.htlcs().iter().zip(&holder_commitment_tx.counterparty_htlc_sigs).zip(htlc_sigs.iter().enumerate());
5195 let remote_signature = Signature::from_der(&hex::decode($counterparty_htlc_sig_hex).unwrap()[..]).unwrap();
5197 let ref htlc = htlcs[$htlc_idx];
5198 let htlc_tx = chan.build_htlc_transaction(&unsigned_tx.txid, &htlc, true, &keys, chan.feerate_per_kw);
5199 let htlc_redeemscript = chan_utils::get_htlc_redeemscript(&htlc, &keys);
5200 let htlc_sighash = Message::from_slice(&bip143::SigHashCache::new(&htlc_tx).signature_hash(0, &htlc_redeemscript, htlc.amount_msat / 1000, SigHashType::All)[..]).unwrap();
5201 secp_ctx.verify(&htlc_sighash, &remote_signature, &keys.countersignatory_htlc_key).unwrap();
5203 let mut preimage: Option<PaymentPreimage> = None;
5206 let out = PaymentHash(Sha256::hash(&[i; 32]).into_inner());
5207 if out == htlc.payment_hash {
5208 preimage = Some(PaymentPreimage([i; 32]));
5212 assert!(preimage.is_some());
5215 let htlc_sig = htlc_sig_iter.next().unwrap();
5216 assert_eq!((htlc_sig.0).0.transaction_output_index, Some($htlc_idx), "output index");
5218 let signature = Signature::from_der(&hex::decode($htlc_sig_hex).unwrap()[..]).unwrap();
5219 assert_eq!(signature, *(htlc_sig.1).1, "htlc sig");
5220 let index = (htlc_sig.1).0;
5221 let channel_parameters = chan.channel_transaction_parameters.as_holder_broadcastable();
5222 let trusted_tx = holder_commitment_tx.trust();
5223 assert_eq!(serialize(&trusted_tx.get_signed_htlc_tx(&channel_parameters, index, &(htlc_sig.0).1, (htlc_sig.1).1, &preimage))[..],
5224 hex::decode($htlc_tx_hex).unwrap()[..], "htlc tx");
5226 assert!(htlc_sig_iter.next().is_none());
5230 // simple commitment tx with no HTLCs
5231 chan.value_to_self_msat = 7000000000;
5233 test_commitment!("3045022100c3127b33dcc741dd6b05b1e63cbd1a9a7d816f37af9b6756fa2376b056f032370220408b96279808fe57eb7e463710804cdf4f108388bc5cf722d8c848d2c7f9f3b0",
5234 "30440220616210b2cc4d3afb601013c373bbd8aac54febd9f15400379a8cb65ce7deca60022034236c010991beb7ff770510561ae8dc885b8d38d1947248c38f2ae055647142",
5235 "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", {});
5237 chan.pending_inbound_htlcs.push({
5238 let mut out = InboundHTLCOutput{
5240 amount_msat: 1000000,
5242 payment_hash: PaymentHash([0; 32]),
5243 state: InboundHTLCState::Committed,
5245 out.payment_hash.0 = Sha256::hash(&hex::decode("0000000000000000000000000000000000000000000000000000000000000000").unwrap()).into_inner();
5248 chan.pending_inbound_htlcs.push({
5249 let mut out = InboundHTLCOutput{
5251 amount_msat: 2000000,
5253 payment_hash: PaymentHash([0; 32]),
5254 state: InboundHTLCState::Committed,
5256 out.payment_hash.0 = Sha256::hash(&hex::decode("0101010101010101010101010101010101010101010101010101010101010101").unwrap()).into_inner();
5259 chan.pending_outbound_htlcs.push({
5260 let mut out = OutboundHTLCOutput{
5262 amount_msat: 2000000,
5264 payment_hash: PaymentHash([0; 32]),
5265 state: OutboundHTLCState::Committed,
5266 source: HTLCSource::dummy(),
5268 out.payment_hash.0 = Sha256::hash(&hex::decode("0202020202020202020202020202020202020202020202020202020202020202").unwrap()).into_inner();
5271 chan.pending_outbound_htlcs.push({
5272 let mut out = OutboundHTLCOutput{
5274 amount_msat: 3000000,
5276 payment_hash: PaymentHash([0; 32]),
5277 state: OutboundHTLCState::Committed,
5278 source: HTLCSource::dummy(),
5280 out.payment_hash.0 = Sha256::hash(&hex::decode("0303030303030303030303030303030303030303030303030303030303030303").unwrap()).into_inner();
5283 chan.pending_inbound_htlcs.push({
5284 let mut out = InboundHTLCOutput{
5286 amount_msat: 4000000,
5288 payment_hash: PaymentHash([0; 32]),
5289 state: InboundHTLCState::Committed,
5291 out.payment_hash.0 = Sha256::hash(&hex::decode("0404040404040404040404040404040404040404040404040404040404040404").unwrap()).into_inner();
5295 // commitment tx with all five HTLCs untrimmed (minimum feerate)
5296 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
5297 chan.feerate_per_kw = 0;
5299 test_commitment!("3044022009b048187705a8cbc9ad73adbe5af148c3d012e1f067961486c822c7af08158c022006d66f3704cfab3eb2dc49dae24e4aa22a6910fc9b424007583204e3621af2e5",
5300 "304402206fc2d1f10ea59951eefac0b4b7c396a3c3d87b71ff0b019796ef4535beaf36f902201765b0181e514d04f4c8ad75659d7037be26cdb3f8bb6f78fe61decef484c3ea",
5301 "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", {
5304 "3045022100d9e29616b8f3959f1d3d7f7ce893ffedcdc407717d0de8e37d808c91d3a7c50d022078c3033f6d00095c8720a4bc943c1b45727818c082e4e3ddbc6d3116435b624b",
5305 "30440220636de5682ef0c5b61f124ec74e8aa2461a69777521d6998295dcea36bc3338110220165285594b23c50b28b82df200234566628a27bcd17f7f14404bd865354eb3ce",
5306 "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" },
5309 "30440220649fe8b20e67e46cbb0d09b4acea87dbec001b39b08dee7bdd0b1f03922a8640022037c462dff79df501cecfdb12ea7f4de91f99230bb544726f6e04527b1f896004",
5310 "3045022100803159dee7935dba4a1d36a61055ce8fd62caa528573cc221ae288515405a252022029c59e7cffce374fe860100a4a63787e105c3cf5156d40b12dd53ff55ac8cf3f",
5311 "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" },
5314 "30440220770fc321e97a19f38985f2e7732dd9fe08d16a2efa4bcbc0429400a447faf49102204d40b417f3113e1b0944ae0986f517564ab4acd3d190503faf97a6e420d43352",
5315 "3045022100a437cc2ce77400ecde441b3398fea3c3ad8bdad8132be818227fe3c5b8345989022069d45e7fa0ae551ec37240845e2c561ceb2567eacf3076a6a43a502d05865faa",
5316 "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" },
5319 "304402207bcbf4f60a9829b05d2dbab84ed593e0291836be715dc7db6b72a64caf646af802201e489a5a84f7c5cc130398b841d138d031a5137ac8f4c49c770a4959dc3c1363",
5320 "304402203121d9b9c055f354304b016a36662ee99e1110d9501cb271b087ddb6f382c2c80220549882f3f3b78d9c492de47543cb9a697cecc493174726146536c5954dac7487",
5321 "02000000000101ab84ff284f162cfbfef241f853b47d4368d171f9e2a1445160cd591c4c7d882b03000000000000000001b80b0000000000002200204adb4e2f00643db396dd120d4e7dc17625f5f2c11a40d857accc862d6b7dd80e050047304402207bcbf4f60a9829b05d2dbab84ed593e0291836be715dc7db6b72a64caf646af802201e489a5a84f7c5cc130398b841d138d031a5137ac8f4c49c770a4959dc3c13630147304402203121d9b9c055f354304b016a36662ee99e1110d9501cb271b087ddb6f382c2c80220549882f3f3b78d9c492de47543cb9a697cecc493174726146536c5954dac748701008576a91414011f7254d96b819c76986c277d115efce6f7b58763ac67210394854aa6eab5b2a8122cc726e9dded053a2184d88256816826d6231c068d4a5b7c820120876475527c21030d417a46946384f88d5f3337267c5e579765875dc4daca813e21734b140639e752ae67a9148a486ff2e31d6158bf39e2608864d63fefd09d5b88ac6868f7010000" },
5324 "3044022076dca5cb81ba7e466e349b7128cdba216d4d01659e29b96025b9524aaf0d1899022060de85697b88b21c749702b7d2cfa7dfeaa1f472c8f1d7d9c23f2bf968464b87",
5325 "3045022100d9080f103cc92bac15ec42464a95f070c7fb6925014e673ee2ea1374d36a7f7502200c65294d22eb20d48564954d5afe04a385551919d8b2ddb4ae2459daaeee1d95",
5326 "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" }
5329 // commitment tx with seven outputs untrimmed (maximum feerate)
5330 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
5331 chan.feerate_per_kw = 647;
5333 test_commitment!("3045022100a135f9e8a5ed25f7277446c67956b00ce6f610ead2bdec2c2f686155b7814772022059f1f6e1a8b336a68efcc1af3fe4d422d4827332b5b067501b099c47b7b5b5ee",
5334 "30450221009ec15c687898bb4da8b3a833e5ab8bfc51ec6e9202aaa8e66611edfd4a85ed1102203d7183e45078b9735c93450bc3415d3e5a8c576141a711ec6ddcb4a893926bb7",
5335 "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", {
5338 "30450221008437627f9ad84ac67052e2a414a4367b8556fd1f94d8b02590f89f50525cd33502205b9c21ff6e7fc864f2352746ad8ba59182510819acb644e25b8a12fc37bbf24f",
5339 "30440220344b0deb055230d01703e6c7acd45853c4af2328b49b5d8af4f88a060733406602202ea64f2a43d5751edfe75503cbc35a62e3141b5ed032fa03360faf4ca66f670b",
5340 "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" },
5343 "304402205a67f92bf6845cf2892b48d874ac1daf88a36495cf8a06f93d83180d930a6f75022031da1621d95c3f335cc06a3056cf960199dae600b7cf89088f65fc53cdbef28c",
5344 "30450221009e5e3822b0185c6799a95288c597b671d6cc69ab80f43740f00c6c3d0752bdda02206da947a74bd98f3175324dc56fdba86cc783703a120a6f0297537e60632f4c7f",
5345 "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" },
5348 "30440220437e21766054a3eef7f65690c5bcfa9920babbc5af92b819f772f6ea96df6c7402207173622024bd97328cfb26c6665e25c2f5d67c319443ccdc60c903217005d8c8",
5349 "3045022100fcfc47e36b712624677626cef3dc1d67f6583bd46926a6398fe6b00b0c9a37760220525788257b187fc775c6370d04eadf34d06f3650a63f8df851cee0ecb47a1673",
5350 "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" },
5353 "304402207436e10737e4df499fc051686d3e11a5bb2310e4d1f1e691d287cef66514791202207cb58e71a6b7a42dd001b7e3ae672ea4f71ea3e1cd412b742e9124abb0739c64",
5354 "3045022100e78211b8409afb7255ffe37337da87f38646f1faebbdd61bc1920d69e3ead67a02201a626305adfcd16bfb7e9340928d9b6305464eab4aa4c4a3af6646e9b9f69dee",
5355 "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" },
5358 "30450221009acd6a827a76bfee50806178dfe0495cd4e1d9c58279c194c7b01520fe68cb8d022024d439047c368883e570997a7d40f0b430cb5a742f507965e7d3063ae3feccca",
5359 "3044022048762cf546bbfe474f1536365ea7c416e3c0389d60558bc9412cb148fb6ab68202207215d7083b75c96ff9d2b08c59c34e287b66820f530b486a9aa4cdd9c347d5b9",
5360 "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" }
5363 // commitment tx with six outputs untrimmed (minimum feerate)
5364 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
5365 chan.feerate_per_kw = 648;
5367 test_commitment!("304402203948f900a5506b8de36a4d8502f94f21dd84fd9c2314ab427d52feaa7a0a19f2022059b6a37a4adaa2c5419dc8aea63c6e2a2ec4c4bde46207f6dc1fcd22152fc6e5",
5368 "3045022100b15f72908ba3382a34ca5b32519240a22300cc6015b6f9418635fb41f3d01d8802207adb331b9ed1575383dca0f2355e86c173802feecf8298fbea53b9d4610583e9",
5369 "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", {
5372 "3045022100a031202f3be94678f0e998622ee95ebb6ada8da1e9a5110228b5e04a747351e4022010ca6a21e18314ed53cfaae3b1f51998552a61a468e596368829a50ce40110e0",
5373 "304502210097e1873b57267730154595187a34949d3744f52933070c74757005e61ce2112e02204ecfba2aa42d4f14bdf8bad4206bb97217b702e6c433e0e1b0ce6587e6d46ec6",
5374 "020000000001010f44041fdfba175987cf4e6135ba2a154e3b7fb96483dc0ed5efc0678e5b6bf10000000000000000000123060000000000002200204adb4e2f00643db396dd120d4e7dc17625f5f2c11a40d857accc862d6b7dd80e0500483045022100a031202f3be94678f0e998622ee95ebb6ada8da1e9a5110228b5e04a747351e4022010ca6a21e18314ed53cfaae3b1f51998552a61a468e596368829a50ce40110e00148304502210097e1873b57267730154595187a34949d3744f52933070c74757005e61ce2112e02204ecfba2aa42d4f14bdf8bad4206bb97217b702e6c433e0e1b0ce6587e6d46ec601008576a91414011f7254d96b819c76986c277d115efce6f7b58763ac67210394854aa6eab5b2a8122cc726e9dded053a2184d88256816826d6231c068d4a5b7c820120876475527c21030d417a46946384f88d5f3337267c5e579765875dc4daca813e21734b140639e752ae67a914b43e1b38138a41b37f7cd9a1d274bc63e3a9b5d188ac6868f6010000" },
5377 "304402202361012a634aee7835c5ecdd6413dcffa8f404b7e77364c792cff984e4ee71e90220715c5e90baa08daa45a7439b1ee4fa4843ed77b19c058240b69406606d384124",
5378 "3044022019de73b00f1d818fb388e83b2c8c31f6bce35ac624e215bc12f88f9dc33edf48022006ff814bb9f700ee6abc3294e146fac3efd4f13f0005236b41c0a946ee00c9ae",
5379 "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" },
5382 "304402207e8e82cd71ed4febeb593732c260456836e97d81896153ecd2b3cf320ca6861702202dd4a30f68f98ced7cc56a36369ac1fdd978248c5ff4ed204fc00cc625532989",
5383 "3045022100bd0be6100c4fd8f102ec220e1b053e4c4e2ecca25615490150007b40d314dc3902201a1e0ea266965b43164d9e6576f58fa6726d42883dd1c3996d2925c2e2260796",
5384 "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" },
5387 "3044022024cd52e4198c8ae0e414a86d86b5a65ea7450f2eb4e783096736d93395eca5ce022078f0094745b45be4d4b2b04dd5978c9e66ba49109e5704403e84aaf5f387d6be",
5388 "3045022100bbfb9d0a946d420807c86e985d636cceb16e71c3694ed186316251a00cbd807202207773223f9a337e145f64673825be9b30d07ef1542c82188b264bedcf7cda78c6",
5389 "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" }
5392 // commitment tx with six outputs untrimmed (maximum feerate)
5393 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
5394 chan.feerate_per_kw = 2069;
5396 test_commitment!("304502210090b96a2498ce0c0f2fadbec2aab278fed54c1a7838df793ec4d2c78d96ec096202204fdd439c50f90d483baa7b68feeef4bd33bc277695405447bcd0bfb2ca34d7bc",
5397 "3045022100ad9a9bbbb75d506ca3b716b336ee3cf975dd7834fcf129d7dd188146eb58a8b4022061a759ee417339f7fe2ea1e8deb83abb6a74db31a09b7648a932a639cda23e33",
5398 "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", {
5401 "3045022100f33513ee38abf1c582876f921f8fddc06acff48e04515532a32d3938de938ffd02203aa308a2c1863b7d6fdf53159a1465bf2e115c13152546cc5d74483ceaa7f699",
5402 "3045022100a637902a5d4c9ba9e7c472a225337d5aac9e2e3f6744f76e237132e7619ba0400220035c60d784a031c0d9f6df66b7eab8726a5c25397399ee4aa960842059eb3f9d",
5403 "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" },
5406 "3045022100ce07682cf4b90093c22dc2d9ab2a77ad6803526b655ef857221cc96af5c9e0bf02200f501cee22e7a268af40b555d15a8237c9f36ad67ef1841daf9f6a0267b1e6df",
5407 "3045022100e57e46234f8782d3ff7aa593b4f7446fb5316c842e693dc63ee324fd49f6a1c302204a2f7b44c48bd26e1554422afae13153eb94b29d3687b733d18930615fb2db61",
5408 "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" },
5411 "3045022100e3e35492e55f82ec0bc2f317ffd7a486d1f7024330fe9743c3559fc39f32ef0c02203d1d4db651fc388a91d5ad8ecdd8e83673063bc8eefe27cfd8c189090e3a23e0",
5412 "3044022068613fb1b98eb3aec7f44c5b115b12343c2f066c4277c82b5f873dfe68f37f50022028109b4650f3f528ca4bfe9a467aff2e3e43893b61b5159157119d5d95cf1c18",
5413 "02000000000101adbe717a63fb658add30ada1e6e12ed257637581898abe475c11d7bbcd65bd4d020000000000000000015d060000000000002200204adb4e2f00643db396dd120d4e7dc17625f5f2c11a40d857accc862d6b7dd80e0500483045022100e3e35492e55f82ec0bc2f317ffd7a486d1f7024330fe9743c3559fc39f32ef0c02203d1d4db651fc388a91d5ad8ecdd8e83673063bc8eefe27cfd8c189090e3a23e001473044022068613fb1b98eb3aec7f44c5b115b12343c2f066c4277c82b5f873dfe68f37f50022028109b4650f3f528ca4bfe9a467aff2e3e43893b61b5159157119d5d95cf1c1801008576a91414011f7254d96b819c76986c277d115efce6f7b58763ac67210394854aa6eab5b2a8122cc726e9dded053a2184d88256816826d6231c068d4a5b7c820120876475527c21030d417a46946384f88d5f3337267c5e579765875dc4daca813e21734b140639e752ae67a9148a486ff2e31d6158bf39e2608864d63fefd09d5b88ac6868f7010000" },
5416 "304402207475aeb0212ef9bf5130b60937817ad88c9a87976988ef1f323f026148cc4a850220739fea17ad3257dcad72e509c73eebe86bee30b178467b9fdab213d631b109df",
5417 "3045022100d315522e09e7d53d2a659a79cb67fef56d6c4bddf3f46df6772d0d20a7beb7c8022070bcc17e288607b6a72be0bd83368bb6d53488db266c1cdb4d72214e4f02ac33",
5418 "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" }
5421 // commitment tx with five outputs untrimmed (minimum feerate)
5422 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
5423 chan.feerate_per_kw = 2070;
5425 test_commitment!("304402204ca1ba260dee913d318271d86e10ca0f5883026fb5653155cff600fb40895223022037b145204b7054a40e08bb1fefbd826f827b40838d3e501423bcc57924bcb50c",
5426 "3044022001014419b5ba00e083ac4e0a85f19afc848aacac2d483b4b525d15e2ae5adbfe022015ebddad6ee1e72b47cb09f3e78459da5be01ccccd95dceca0e056a00cc773c1",
5427 "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", {
5430 "304402205f6b6d12d8d2529fb24f4445630566cf4abbd0f9330ab6c2bdb94222d6a2a0c502202f556258ae6f05b193749e4c541dfcc13b525a5422f6291f073f15617ba8579b",
5431 "30440220150b11069454da70caf2492ded9e0065c9a57f25ac2a4c52657b1d15b6c6ed85022068a38833b603c8892717206383611bad210f1cbb4b1f87ea29c6c65b9e1cb3e5",
5432 "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" },
5435 "3045022100f960dfb1c9aee7ce1437efa65b523e399383e8149790e05d8fed27ff6e42fe0002202fe8613e062ffe0b0c518cc4101fba1c6de70f64a5bcc7ae663f2efae43b8546",
5436 "30450221009a6ed18e6873bc3644332a6ee21c152a5b102821865350df7a8c74451a51f9f2022050d801fb4895d7d7fbf452824c0168347f5c0cbe821cf6a97a63af5b8b2563c6",
5437 "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" },
5440 "3045022100ae5fc7717ae684bc1fcf9020854e5dbe9842c9e7472879ac06ff95ac2bb10e4e022057728ada4c00083a3e65493fb5d50a232165948a1a0f530ef63185c2c8c56504",
5441 "30440220408ad3009827a8fccf774cb285587686bfb2ed041f89a89453c311ce9c8ee0f902203c7392d9f8306d3a46522a66bd2723a7eb2628cb2d9b34d4c104f1766bf37502",
5442 "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" }
5445 // commitment tx with five outputs untrimmed (maximum feerate)
5446 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
5447 chan.feerate_per_kw = 2194;
5449 test_commitment!("304402204bb3d6e279d71d9da414c82de42f1f954267c762b2e2eb8b76bc3be4ea07d4b0022014febc009c5edc8c3fc5d94015de163200f780046f1c293bfed8568f08b70fb3",
5450 "3044022072c2e2b1c899b2242656a537dde2892fa3801be0d6df0a87836c550137acde8302201654aa1974d37a829083c3ba15088689f30b56d6a4f6cb14c7bad0ee3116d398",
5451 "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", {
5454 "3045022100939726680351a7856c1bc386d4a1f422c7d29bd7b56afc139570f508474e6c40022023175a799ccf44c017fbaadb924c40b2a12115a5b7d0dfd3228df803a2de8450",
5455 "304502210099c98c2edeeee6ec0fb5f3bea8b79bb016a2717afa9b5072370f34382de281d302206f5e2980a995e045cf90a547f0752a7ee99d48547bc135258fe7bc07e0154301",
5456 "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" },
5459 "3044022021bb883bf324553d085ba2e821cad80c28ef8b303dbead8f98e548783c02d1600220638f9ef2a9bba25869afc923f4b5dc38be3bb459f9efa5d869392d5f7779a4a0",
5460 "3045022100fd85bd7697b89c08ec12acc8ba89b23090637d83abd26ca37e01ae93e67c367302202b551fe69386116c47f984aab9c8dfd25d864dcde5d3389cfbef2447a85c4b77",
5461 "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" },
5464 "3045022100c9e6f0454aa598b905a35e641a70cc9f67b5f38cc4b00843a041238c4a9f1c4a0220260a2822a62da97e44583e837245995ca2e36781769c52f19e498efbdcca262b",
5465 "30450221008a9f2ea24cd455c2b64c1472a5fa83865b0a5f49a62b661801e884cf2849af8302204d44180e50bf6adfcf1c1e581d75af91aba4e28681ce4a5ee5f3cbf65eca10f3",
5466 "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" }
5469 // commitment tx with four outputs untrimmed (minimum feerate)
5470 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
5471 chan.feerate_per_kw = 2195;
5473 test_commitment!("304402201a8c1b1f9671cd9e46c7323a104d7047cc48d3ee80d40d4512e0c72b8dc65666022066d7f9a2ce18c9eb22d2739ffcce05721c767f9b607622a31b6ea5793ddce403",
5474 "3044022044d592025b610c0d678f65032e87035cdfe89d1598c522cc32524ae8172417c30220749fef9d5b2ae8cdd91ece442ba8809bc891efedae2291e578475f97715d1767",
5475 "02000000000101bef67e4e2fb9ddeeb3461973cd4c62abb35050b1add772995b820b584a488489000000000038b02b8004b80b000000000000220020c20b5d1f8584fd90443e7b7b720136174fa4b9333c261d04dbbd012635c0f419a00f0000000000002200208c48d15160397c9731df9bc3b236656efb6665fbfe92b4a6878e88a499f741c4c0c62d0000000000160014cc1b07838e387deacd0e5232e1e8b49f4c29e484b8976a00000000002200204adb4e2f00643db396dd120d4e7dc17625f5f2c11a40d857accc862d6b7dd80e0400473044022044d592025b610c0d678f65032e87035cdfe89d1598c522cc32524ae8172417c30220749fef9d5b2ae8cdd91ece442ba8809bc891efedae2291e578475f97715d17670147304402201a8c1b1f9671cd9e46c7323a104d7047cc48d3ee80d40d4512e0c72b8dc65666022066d7f9a2ce18c9eb22d2739ffcce05721c767f9b607622a31b6ea5793ddce40301475221023da092f6980e58d2c037173180e9a465476026ee50f96695963e8efe436f54eb21030e9f7b623d2ccc7c9bd44d66d5ce21ce504c0acf6385a132cec6d3c39fa711c152ae3e195220", {
5478 "3045022100e57b845066a06ee7c2cbfc29eabffe52daa9bf6f6de760066d04df9f9b250e0002202ffb197f0e6e0a77a75a9aff27014bd3de83b7f748d7efef986abe655e1dd50e",
5479 "3045022100ecc8c6529d0b2316d046f0f0757c1e1c25a636db168ec4f3aa1b9278df685dc0022067ae6b65e936f1337091f7b18a15935b608c5f2cdddb2f892ed0babfdd376d76",
5480 "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" },
5483 "3045022100d193b7ecccad8057571620a0b1ffa6c48e9483311723b59cf536043b20bc51550220546d4bd37b3b101ecda14f6c907af46ec391abce1cd9c7ce22b1a62b534f2f2a",
5484 "3044022014d66f11f9cacf923807eba49542076c5fe5cccf252fb08fe98c78ef3ca6ab5402201b290dbe043cc512d9d78de074a5a129b8759bc6a6c546b190d120b690bd6e82",
5485 "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" }
5488 // commitment tx with four outputs untrimmed (maximum feerate)
5489 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
5490 chan.feerate_per_kw = 3702;
5492 test_commitment!("304502210092a587aeb777f869e7ff0d7898ea619ee26a3dacd1f3672b945eea600be431100220077ee9eae3528d15251f2a52b607b189820e57a6ccfac8d1af502b132ee40169",
5493 "3045022100e5efb73c32d32da2d79702299b6317de6fb24a60476e3855926d78484dd1b3c802203557cb66a42c944ef06e00bcc4da35a5bcb2f185aab0f8e403e519e1d66aaf75",
5494 "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", {
5497 "304402206fa54c11f98c3bae1e93df43fc7affeb05b476bf8060c03e29c377c69bc08e8b0220672701cce50d5c379ff45a5d2cfe48ac44973adb066ac32608e21221d869bb89",
5498 "304402206e36c683ebf2cb16bcef3d5439cf8b53cd97280a365ed8acd7abb85a8ba5f21c02206e8621edfc2a5766cbc96eb67fd501127ff163eb6b85518a39f7d4974aef126f",
5499 "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" },
5502 "3044022057649739b0eb74d541ead0dfdb3d4b2c15aa192720031044c3434c67812e5ca902201e5ede42d960ae551707f4a6b34b09393cf4dee2418507daa022e3550dbb5817",
5503 "304402207faad26678c8850e01b4a0696d60841f7305e1832b786110ee9075cb92ed14a30220516ef8ee5dfa80824ea28cbcec0dd95f8b847146257c16960db98507db15ffdc",
5504 "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" }
5507 // commitment tx with three outputs untrimmed (minimum feerate)
5508 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
5509 chan.feerate_per_kw = 3703;
5511 test_commitment!("3045022100b495d239772a237ff2cf354b1b11be152fd852704cb184e7356d13f2fb1e5e430220723db5cdb9cbd6ead7bfd3deb419cf41053a932418cbb22a67b581f40bc1f13e",
5512 "304402201b736d1773a124c745586217a75bed5f66c05716fbe8c7db4fdb3c3069741cdd02205083f39c321c1bcadfc8d97e3c791a66273d936abac0c6a2fde2ed46019508e1",
5513 "02000000000101bef67e4e2fb9ddeeb3461973cd4c62abb35050b1add772995b820b584a488489000000000038b02b8003a00f0000000000002200208c48d15160397c9731df9bc3b236656efb6665fbfe92b4a6878e88a499f741c4c0c62d0000000000160014cc1b07838e387deacd0e5232e1e8b49f4c29e484eb936a00000000002200204adb4e2f00643db396dd120d4e7dc17625f5f2c11a40d857accc862d6b7dd80e040047304402201b736d1773a124c745586217a75bed5f66c05716fbe8c7db4fdb3c3069741cdd02205083f39c321c1bcadfc8d97e3c791a66273d936abac0c6a2fde2ed46019508e101483045022100b495d239772a237ff2cf354b1b11be152fd852704cb184e7356d13f2fb1e5e430220723db5cdb9cbd6ead7bfd3deb419cf41053a932418cbb22a67b581f40bc1f13e01475221023da092f6980e58d2c037173180e9a465476026ee50f96695963e8efe436f54eb21030e9f7b623d2ccc7c9bd44d66d5ce21ce504c0acf6385a132cec6d3c39fa711c152ae3e195220", {
5516 "3045022100c34c61735f93f2e324cc873c3b248111ccf8f6db15d5969583757010d4ad2b4602207867bb919b2ddd6387873e425345c9b7fd18d1d66aba41f3607bc2896ef3c30a",
5517 "3045022100988c143e2110067117d2321bdd4bd16ca1734c98b29290d129384af0962b634e02206c1b02478878c5f547018b833986578f90c3e9be669fe5788ad0072a55acbb05",
5518 "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" }
5521 // commitment tx with three outputs untrimmed (maximum feerate)
5522 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
5523 chan.feerate_per_kw = 4914;
5525 test_commitment!("3045022100b4b16d5f8cc9fc4c1aff48831e832a0d8990e133978a66e302c133550954a44d022073573ce127e2200d316f6b612803a5c0c97b8d20e1e44dbe2ac0dd2fb8c95244",
5526 "3045022100d72638bc6308b88bb6d45861aae83e5b9ff6e10986546e13bce769c70036e2620220320be7c6d66d22f30b9fcd52af66531505b1310ca3b848c19285b38d8a1a8c19",
5527 "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", {
5530 "3045022100f43591c156038ba217756006bb3c55f7d113a325cdd7d9303c82115372858d68022016355b5aadf222bc8d12e426c75f4a03423917b2443a103eb2a498a3a2234374",
5531 "30440220585dee80fafa264beac535c3c0bb5838ac348b156fdc982f86adc08dfc9bfd250220130abb82f9f295cc9ef423dcfef772fde2acd85d9df48cc538981d26a10a9c10",
5532 "02000000000101a9172908eace869cc35128c31fc2ab502f72e4dff31aab23e0244c4b04b11ab00000000000000000000122020000000000002200204adb4e2f00643db396dd120d4e7dc17625f5f2c11a40d857accc862d6b7dd80e0500483045022100f43591c156038ba217756006bb3c55f7d113a325cdd7d9303c82115372858d68022016355b5aadf222bc8d12e426c75f4a03423917b2443a103eb2a498a3a2234374014730440220585dee80fafa264beac535c3c0bb5838ac348b156fdc982f86adc08dfc9bfd250220130abb82f9f295cc9ef423dcfef772fde2acd85d9df48cc538981d26a10a9c10012004040404040404040404040404040404040404040404040404040404040404048a76a91414011f7254d96b819c76986c277d115efce6f7b58763ac67210394854aa6eab5b2a8122cc726e9dded053a2184d88256816826d6231c068d4a5b7c8201208763a91418bc1a114ccf9c052d3d23e28d3b0a9d1227434288527c21030d417a46946384f88d5f3337267c5e579765875dc4daca813e21734b140639e752ae677502f801b175ac686800000000" }
5535 // commitment tx with two outputs untrimmed (minimum feerate)
5536 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
5537 chan.feerate_per_kw = 4915;
5539 test_commitment!("304402203a286936e74870ca1459c700c71202af0381910a6bfab687ef494ef1bc3e02c902202506c362d0e3bee15e802aa729bf378e051644648253513f1c085b264cc2a720",
5540 "30450221008a953551f4d67cb4df3037207fc082ddaf6be84d417b0bd14c80aab66f1b01a402207508796dc75034b2dee876fe01dc05a08b019f3e5d689ac8842ade2f1befccf5",
5541 "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", {});
5543 // commitment tx with two outputs untrimmed (maximum feerate)
5544 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
5545 chan.feerate_per_kw = 9651180;
5547 test_commitment!("304402200a8544eba1d216f5c5e530597665fa9bec56943c0f66d98fc3d028df52d84f7002201e45fa5c6bc3a506cc2553e7d1c0043a9811313fc39c954692c0d47cfce2bbd3",
5548 "3045022100e11b638c05c650c2f63a421d36ef8756c5ce82f2184278643520311cdf50aa200220259565fb9c8e4a87ccaf17f27a3b9ca4f20625754a0920d9c6c239d8156a11de",
5549 "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", {});
5551 // commitment tx with one output untrimmed (minimum feerate)
5552 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
5553 chan.feerate_per_kw = 9651181;
5555 test_commitment!("304402202ade0142008309eb376736575ad58d03e5b115499709c6db0b46e36ff394b492022037b63d78d66404d6504d4c4ac13be346f3d1802928a6d3ad95a6a944227161a2",
5556 "304402207e8d51e0c570a5868a78414f4e0cbfaed1106b171b9581542c30718ee4eb95ba02203af84194c97adf98898c9afe2f2ed4a7f8dba05a2dfab28ac9d9c604aa49a379",
5557 "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", {});
5559 // commitment tx with fee greater than funder amount
5560 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
5561 chan.feerate_per_kw = 9651936;
5563 test_commitment!("304402202ade0142008309eb376736575ad58d03e5b115499709c6db0b46e36ff394b492022037b63d78d66404d6504d4c4ac13be346f3d1802928a6d3ad95a6a944227161a2",
5564 "304402207e8d51e0c570a5868a78414f4e0cbfaed1106b171b9581542c30718ee4eb95ba02203af84194c97adf98898c9afe2f2ed4a7f8dba05a2dfab28ac9d9c604aa49a379",
5565 "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", {});
5567 // commitment tx with 3 htlc outputs, 2 offered having the same amount and preimage
5568 chan.value_to_self_msat = 7_000_000_000 - 2_000_000;
5569 chan.feerate_per_kw = 253;
5570 chan.pending_inbound_htlcs.clear();
5571 chan.pending_inbound_htlcs.push({
5572 let mut out = InboundHTLCOutput{
5574 amount_msat: 2000000,
5576 payment_hash: PaymentHash([0; 32]),
5577 state: InboundHTLCState::Committed,
5579 out.payment_hash.0 = Sha256::hash(&hex::decode("0101010101010101010101010101010101010101010101010101010101010101").unwrap()).into_inner();
5582 chan.pending_outbound_htlcs.clear();
5583 chan.pending_outbound_htlcs.push({
5584 let mut out = OutboundHTLCOutput{
5586 amount_msat: 5000000,
5588 payment_hash: PaymentHash([0; 32]),
5589 state: OutboundHTLCState::Committed,
5590 source: HTLCSource::dummy(),
5592 out.payment_hash.0 = Sha256::hash(&hex::decode("0505050505050505050505050505050505050505050505050505050505050505").unwrap()).into_inner();
5595 chan.pending_outbound_htlcs.push({
5596 let mut out = OutboundHTLCOutput{
5598 amount_msat: 5000000,
5600 payment_hash: PaymentHash([0; 32]),
5601 state: OutboundHTLCState::Committed,
5602 source: HTLCSource::dummy(),
5604 out.payment_hash.0 = Sha256::hash(&hex::decode("0505050505050505050505050505050505050505050505050505050505050505").unwrap()).into_inner();
5608 test_commitment!("30440220048705bec5288d28b3f29344b8d124853b1af423a568664d2c6f02c8ea886525022060f998a461052a2476b912db426ea2a06700953a241135c7957f2e79bc222df9",
5609 "3045022100c4f1d60b6fca9febc8b39de1a31e84c5f7c4b41c97239ef05f4350aa484c6b5e02200c5134ac8b20eb7a29d0dd4a501f6aa8fefb8489171f4cb408bd2a32324ab03f",
5610 "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", {
5613 "304502210081cbb94121761d34c189cd4e6a281feea6f585060ad0ba2632e8d6b3c6bb8a6c02201007981bbd16539d63df2805b5568f1f5688cd2a885d04706f50db9b77ba13c6",
5614 "304502210090ed76aeb21b53236a598968abc66e2024691d07b62f53ddbeca8f93144af9c602205f873af5a0c10e62690e9aba09740550f194a9dc455ba4c1c23f6cde7704674c",
5615 "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" },
5617 "304402201d0f09d2bf7bc245a4f17980e1e9164290df16c70c6a2ff1592f5030d6108581022061e744a7dc151b36bf0aff7a4f1812ba90b8b03633bb979a270d19858fd960c5",
5618 "30450221009aef000d2e843a4202c1b1a2bf554abc9a7902bf49b2cb0759bc507456b7ebad02204e7c3d193ede2fd2b4cd6b39f51a920e581e35575e357e44d7b699c40ce61d39",
5619 "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" },
5621 "30440220010bf035d5823596e50dce2076a4d9f942d8d28031c9c428b901a02b6b8140de02203250e8e4a08bc5b4ecdca4d0eedf98223e02e3ac1c0206b3a7ffdb374aa21e5f",
5622 "30440220073de0067b88e425b3018b30366bfeda0ccb703118ccd3d02ead08c0f53511d002203fac50ac0e4cf8a3af0b4b1b12e801650591f748f8ddf1e089c160f10b69e511",
5623 "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" }
5628 fn test_per_commitment_secret_gen() {
5629 // Test vectors from BOLT 3 Appendix D:
5631 let mut seed = [0; 32];
5632 seed[0..32].clone_from_slice(&hex::decode("0000000000000000000000000000000000000000000000000000000000000000").unwrap());
5633 assert_eq!(chan_utils::build_commitment_secret(&seed, 281474976710655),
5634 hex::decode("02a40c85b6f28da08dfdbe0926c53fab2de6d28c10301f8f7c4073d5e42e3148").unwrap()[..]);
5636 seed[0..32].clone_from_slice(&hex::decode("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF").unwrap());
5637 assert_eq!(chan_utils::build_commitment_secret(&seed, 281474976710655),
5638 hex::decode("7cc854b54e3e0dcdb010d7a3fee464a9687be6e8db3be6854c475621e007a5dc").unwrap()[..]);
5640 assert_eq!(chan_utils::build_commitment_secret(&seed, 0xaaaaaaaaaaa),
5641 hex::decode("56f4008fb007ca9acf0e15b054d5c9fd12ee06cea347914ddbaed70d1c13a528").unwrap()[..]);
5643 assert_eq!(chan_utils::build_commitment_secret(&seed, 0x555555555555),
5644 hex::decode("9015daaeb06dba4ccc05b91b2f73bd54405f2be9f217fbacd3c5ac2e62327d31").unwrap()[..]);
5646 seed[0..32].clone_from_slice(&hex::decode("0101010101010101010101010101010101010101010101010101010101010101").unwrap());
5647 assert_eq!(chan_utils::build_commitment_secret(&seed, 1),
5648 hex::decode("915c75942a26bb3a433a8ce2cb0427c29ec6c1775cfc78328b57f6ba7bfeaa9c").unwrap()[..]);
5652 fn test_key_derivation() {
5653 // Test vectors from BOLT 3 Appendix E:
5654 let secp_ctx = Secp256k1::new();
5656 let base_secret = SecretKey::from_slice(&hex::decode("000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f").unwrap()[..]).unwrap();
5657 let per_commitment_secret = SecretKey::from_slice(&hex::decode("1f1e1d1c1b1a191817161514131211100f0e0d0c0b0a09080706050403020100").unwrap()[..]).unwrap();
5659 let base_point = PublicKey::from_secret_key(&secp_ctx, &base_secret);
5660 assert_eq!(base_point.serialize()[..], hex::decode("036d6caac248af96f6afa7f904f550253a0f3ef3f5aa2fe6838a95b216691468e2").unwrap()[..]);
5662 let per_commitment_point = PublicKey::from_secret_key(&secp_ctx, &per_commitment_secret);
5663 assert_eq!(per_commitment_point.serialize()[..], hex::decode("025f7117a78150fe2ef97db7cfc83bd57b2e2c0d0dd25eaf467a4a1c2a45ce1486").unwrap()[..]);
5665 assert_eq!(chan_utils::derive_public_key(&secp_ctx, &per_commitment_point, &base_point).unwrap().serialize()[..],
5666 hex::decode("0235f2dbfaa89b57ec7b055afe29849ef7ddfeb1cefdb9ebdc43f5494984db29e5").unwrap()[..]);
5668 assert_eq!(chan_utils::derive_private_key(&secp_ctx, &per_commitment_point, &base_secret).unwrap(),
5669 SecretKey::from_slice(&hex::decode("cbced912d3b21bf196a766651e436aff192362621ce317704ea2f75d87e7be0f").unwrap()[..]).unwrap());
5671 assert_eq!(chan_utils::derive_public_revocation_key(&secp_ctx, &per_commitment_point, &base_point).unwrap().serialize()[..],
5672 hex::decode("02916e326636d19c33f13e8c0c3a03dd157f332f3e99c317c141dd865eb01f8ff0").unwrap()[..]);
5674 assert_eq!(chan_utils::derive_private_revocation_key(&secp_ctx, &per_commitment_secret, &base_secret).unwrap(),
5675 SecretKey::from_slice(&hex::decode("d09ffff62ddb2297ab000cc85bcb4283fdeb6aa052affbc9dddcf33b61078110").unwrap()[..]).unwrap());