1 use bitcoin::blockdata::block::BlockHeader;
2 use bitcoin::blockdata::script::{Script,Builder};
3 use bitcoin::blockdata::transaction::{TxIn, TxOut, Transaction, SigHashType};
4 use bitcoin::blockdata::opcodes;
5 use bitcoin::util::hash::{Sha256dHash, Hash160};
6 use bitcoin::util::bip143;
7 use bitcoin::network::serialize::BitcoinHash;
9 use secp256k1::key::{PublicKey,SecretKey};
10 use secp256k1::{Secp256k1,Message,Signature};
13 use crypto::digest::Digest;
14 use crypto::hkdf::{hkdf_extract,hkdf_expand};
17 use ln::msgs::{ErrorAction, HandleError};
18 use ln::channelmonitor::ChannelMonitor;
19 use ln::channelmanager::{PendingHTLCStatus, HTLCSource, PendingForwardHTLCInfo, HTLCFailReason, HTLCFailureMsg};
20 use ln::chan_utils::{TxCreationKeys,HTLCOutputInCommitment,HTLC_SUCCESS_TX_WEIGHT,HTLC_TIMEOUT_TX_WEIGHT};
22 use chain::chaininterface::{FeeEstimator,ConfirmationTarget};
23 use chain::transaction::OutPoint;
24 use util::{transaction_utils,rng};
25 use util::ser::Writeable;
26 use util::sha2::Sha256;
27 use util::logger::Logger;
28 use util::errors::APIError;
31 use std::default::Default;
33 use std::time::Instant;
36 pub struct ChannelKeys {
37 pub funding_key: SecretKey,
38 pub revocation_base_key: SecretKey,
39 pub payment_base_key: SecretKey,
40 pub delayed_payment_base_key: SecretKey,
41 pub htlc_base_key: SecretKey,
42 pub channel_close_key: SecretKey,
43 pub channel_monitor_claim_key: SecretKey,
44 pub commitment_seed: [u8; 32],
48 pub fn new_from_seed(seed: &[u8; 32]) -> Result<ChannelKeys, secp256k1::Error> {
49 let mut prk = [0; 32];
50 hkdf_extract(Sha256::new(), b"rust-lightning key gen salt", seed, &mut prk);
51 let secp_ctx = Secp256k1::without_caps();
53 let mut okm = [0; 32];
54 hkdf_expand(Sha256::new(), &prk, b"rust-lightning funding key info", &mut okm);
55 let funding_key = SecretKey::from_slice(&secp_ctx, &okm)?;
57 hkdf_expand(Sha256::new(), &prk, b"rust-lightning revocation base key info", &mut okm);
58 let revocation_base_key = SecretKey::from_slice(&secp_ctx, &okm)?;
60 hkdf_expand(Sha256::new(), &prk, b"rust-lightning payment base key info", &mut okm);
61 let payment_base_key = SecretKey::from_slice(&secp_ctx, &okm)?;
63 hkdf_expand(Sha256::new(), &prk, b"rust-lightning delayed payment base key info", &mut okm);
64 let delayed_payment_base_key = SecretKey::from_slice(&secp_ctx, &okm)?;
66 hkdf_expand(Sha256::new(), &prk, b"rust-lightning htlc base key info", &mut okm);
67 let htlc_base_key = SecretKey::from_slice(&secp_ctx, &okm)?;
69 hkdf_expand(Sha256::new(), &prk, b"rust-lightning channel close key info", &mut okm);
70 let channel_close_key = SecretKey::from_slice(&secp_ctx, &okm)?;
72 hkdf_expand(Sha256::new(), &prk, b"rust-lightning channel monitor claim key info", &mut okm);
73 let channel_monitor_claim_key = SecretKey::from_slice(&secp_ctx, &okm)?;
75 hkdf_expand(Sha256::new(), &prk, b"rust-lightning local commitment seed info", &mut okm);
78 funding_key: funding_key,
79 revocation_base_key: revocation_base_key,
80 payment_base_key: payment_base_key,
81 delayed_payment_base_key: delayed_payment_base_key,
82 htlc_base_key: htlc_base_key,
83 channel_close_key: channel_close_key,
84 channel_monitor_claim_key: channel_monitor_claim_key,
91 enum InboundHTLCState {
92 /// Added by remote, to be included in next local commitment tx.
94 /// Included in a received commitment_signed message (implying we've revoke_and_ack'ed it), but
95 /// the remote side hasn't yet revoked their previous state, which we need them to do before we
96 /// accept this HTLC. Implies AwaitingRemoteRevoke.
97 /// We also have not yet included this HTLC in a commitment_signed message, and are waiting on
98 /// a remote revoke_and_ack on a previous state before we can do so.
99 AwaitingRemoteRevokeToAnnounce,
100 /// Included in a received commitment_signed message (implying we've revoke_and_ack'ed it), but
101 /// the remote side hasn't yet revoked their previous state, which we need them to do before we
102 /// accept this HTLC. Implies AwaitingRemoteRevoke.
103 /// We have included this HTLC in our latest commitment_signed and are now just waiting on a
105 AwaitingAnnouncedRemoteRevoke,
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_info will not include this HTLC.
120 struct InboundHTLCOutput {
124 payment_hash: [u8; 32],
125 state: InboundHTLCState,
126 /// If we're in LocalRemoved, set to true if we fulfilled the HTLC, and can claim money
127 local_removed_fulfilled: bool,
128 /// state pre-Committed implies pending_forward_state, otherwise it must be None
129 pending_forward_state: Option<PendingHTLCStatus>,
133 enum OutboundHTLCState {
134 /// Added by us and included in a commitment_signed (if we were AwaitingRemoteRevoke when we
135 /// created it we would have put it in the holding cell instead). When they next revoke_and_ack
136 /// we will promote to Committed (note that they may not accept it until the next time we
137 /// revoke, but we dont really care about that:
138 /// * they've revoked, so worst case we can announce an old state and get our (option on)
139 /// money back (though we wont), and,
140 /// * we'll send them a revoke when they send a commitment_signed, and since only they're
141 /// allowed to remove it, the "can only be removed once committed on both sides" requirement
142 /// doesn't matter to us and its up to them to enforce it, worst-case they jump ahead but
143 /// we'll never get out of sync).
146 /// Remote removed this (outbound) HTLC. We're waiting on their commitment_signed to finalize
147 /// the change (though they'll need to revoke before we fail the payment).
149 /// Remote removed this and sent a commitment_signed (implying we've revoke_and_ack'ed it), but
150 /// the remote side hasn't yet revoked their previous state, which we need them to do before we
151 /// can do any backwards failing. Implies AwaitingRemoteRevoke.
152 /// We also have not yet removed this HTLC in a commitment_signed message, and are waiting on a
153 /// remote revoke_and_ack on a previous state before we can do so.
154 AwaitingRemoteRevokeToRemove,
155 /// Remote removed this and sent a commitment_signed (implying we've revoke_and_ack'ed it), but
156 /// the remote side hasn't yet revoked their previous state, which we need them to do before we
157 /// can do any backwards failing. Implies AwaitingRemoteRevoke.
158 /// We have removed this HTLC in our latest commitment_signed and are now just waiting on a
159 /// revoke_and_ack to drop completely.
160 AwaitingRemovedRemoteRevoke,
163 struct OutboundHTLCOutput {
167 payment_hash: [u8; 32],
168 state: OutboundHTLCState,
170 /// If we're in a removed state, set if they failed, otherwise None
171 fail_reason: Option<HTLCFailReason>,
174 macro_rules! get_htlc_in_commitment {
175 ($htlc: expr, $offered: expr) => {
176 HTLCOutputInCommitment {
178 amount_msat: $htlc.amount_msat,
179 cltv_expiry: $htlc.cltv_expiry,
180 payment_hash: $htlc.payment_hash,
181 transaction_output_index: 0
186 /// See AwaitingRemoteRevoke ChannelState for more info
187 enum HTLCUpdateAwaitingACK {
192 payment_hash: [u8; 32],
194 onion_routing_packet: msgs::OnionPacket,
195 time_created: Instant, //TODO: Some kind of timeout thing-a-majig
198 payment_preimage: [u8; 32],
203 err_packet: msgs::OnionErrorPacket,
207 /// There are a few "states" and then a number of flags which can be applied:
208 /// We first move through init with OurInitSent -> TheirInitSent -> FundingCreated -> FundingSent.
209 /// TheirFundingLocked and OurFundingLocked then get set on FundingSent, and when both are set we
210 /// move on to ChannelFunded.
211 /// Note that PeerDisconnected can be set on both ChannelFunded and FundingSent.
212 /// ChannelFunded can then get all remaining flags set on it, until we finish shutdown, then we
213 /// move on to ShutdownComplete, at which point most calls into this channel are disallowed.
215 /// Implies we have (or are prepared to) send our open_channel/accept_channel message
216 OurInitSent = (1 << 0),
217 /// Implies we have received their open_channel/accept_channel message
218 TheirInitSent = (1 << 1),
219 /// We have sent funding_created and are awaiting a funding_signed to advance to FundingSent.
220 /// Note that this is nonsense for an inbound channel as we immediately generate funding_signed
221 /// upon receipt of funding_created, so simply skip this state.
223 /// Set when we have received/sent funding_created and funding_signed and are thus now waiting
224 /// on the funding transaction to confirm. The FundingLocked flags are set to indicate when we
225 /// and our counterparty consider the funding transaction confirmed.
227 /// Flag which can be set on FundingSent to indicate they sent us a funding_locked message.
228 /// Once both TheirFundingLocked and OurFundingLocked are set, state moves on to ChannelFunded.
229 TheirFundingLocked = (1 << 4),
230 /// Flag which can be set on FundingSent to indicate we sent them a funding_locked message.
231 /// Once both TheirFundingLocked and OurFundingLocked are set, state moves on to ChannelFunded.
232 OurFundingLocked = (1 << 5),
234 /// Flag which is set on ChannelFunded and FundingSent indicating remote side is considered
235 /// "disconnected" and no updates are allowed until after we've done a channel_reestablish
237 PeerDisconnected = (1 << 7),
238 /// Flag which implies that we have sent a commitment_signed but are awaiting the responding
239 /// revoke_and_ack message. During this time period, we can't generate new commitment_signed
240 /// messages as then we will be unable to determine which HTLCs they included in their
241 /// revoke_and_ack implicit ACK, so instead we have to hold them away temporarily to be sent
243 /// Flag is set on ChannelFunded.
244 AwaitingRemoteRevoke = (1 << 8),
245 /// Flag which is set on ChannelFunded or FundingSent after receiving a shutdown message from
246 /// the remote end. If set, they may not add any new HTLCs to the channel, and we are expected
247 /// to respond with our own shutdown message when possible.
248 RemoteShutdownSent = (1 << 9),
249 /// Flag which is set on ChannelFunded or FundingSent after sending a shutdown message. At this
250 /// point, we may not add any new HTLCs to the channel.
251 /// TODO: Investigate some kind of timeout mechanism by which point the remote end must provide
252 /// us their shutdown.
253 LocalShutdownSent = (1 << 10),
254 /// We've successfully negotiated a closing_signed dance. At this point ChannelManager is about
255 /// to drop us, but we store this anyway.
256 ShutdownComplete = 2048,
258 const BOTH_SIDES_SHUTDOWN_MASK: u32 = (ChannelState::LocalShutdownSent as u32 | ChannelState::RemoteShutdownSent as u32);
260 const INITIAL_COMMITMENT_NUMBER: u64 = (1 << 48) - 1;
262 // TODO: We should refactor this to be an Inbound/OutboundChannel until initial setup handshaking
263 // has been completed, and then turn into a Channel to get compiler-time enforcement of things like
264 // calling channel_id() before we're set up or things like get_outbound_funding_signed on an
266 pub(super) struct Channel {
269 channel_id: [u8; 32],
271 channel_outbound: bool,
272 secp_ctx: Secp256k1<secp256k1::All>,
273 announce_publicly: bool,
274 channel_value_satoshis: u64,
276 local_keys: ChannelKeys,
278 // Our commitment numbers start at 2^48-1 and count down, whereas the ones used in transaction
279 // generation start at 0 and count up...this simplifies some parts of implementation at the
280 // cost of others, but should really just be changed.
282 cur_local_commitment_transaction_number: u64,
283 cur_remote_commitment_transaction_number: u64,
284 value_to_self_msat: u64, // Excluding all pending_htlcs, excluding fees
285 pending_inbound_htlcs: Vec<InboundHTLCOutput>,
286 pending_outbound_htlcs: Vec<OutboundHTLCOutput>,
287 holding_cell_htlc_updates: Vec<HTLCUpdateAwaitingACK>,
289 // pending_update_fee is filled when sending and receiving update_fee
290 // For outbound channel, feerate_per_kw is updated with the value from
291 // pending_update_fee when revoke_and_ack is received
293 // For inbound channel, feerate_per_kw is updated when it receives
294 // commitment_signed and revoke_and_ack is generated
295 // The pending value is kept when another pair of update_fee and commitment_signed
296 // is received during AwaitingRemoteRevoke and relieved when the expected
297 // revoke_and_ack is received and new commitment_signed is generated to be
298 // sent to the funder. Otherwise, the pending value is removed when receiving
299 // commitment_signed.
300 pending_update_fee: Option<u64>,
301 // update_fee() during ChannelState::AwaitingRemoteRevoke is hold in
302 // holdina_cell_update_fee then moved to pending_udpate_fee when revoke_and_ack
303 // is received. holding_cell_update_fee is updated when there are additional
304 // update_fee() during ChannelState::AwaitingRemoteRevoke.
305 holding_cell_update_fee: Option<u64>,
306 next_local_htlc_id: u64,
307 next_remote_htlc_id: u64,
308 channel_update_count: u32,
312 // Used in ChannelManager's tests to send a revoked transaction
313 pub last_local_commitment_txn: Vec<Transaction>,
315 last_local_commitment_txn: Vec<Transaction>,
317 last_sent_closing_fee: Option<(u64, u64)>, // (feerate, fee)
319 /// The hash of the block in which the funding transaction reached our CONF_TARGET. We use this
320 /// to detect unconfirmation after a serialize-unserialize roudtrip where we may not see a full
321 /// series of block_connected/block_disconnected calls. Obviously this is not a guarantee as we
322 /// could miss the funding_tx_confirmed_in block as well, but it serves as a useful fallback.
323 funding_tx_confirmed_in: Option<Sha256dHash>,
324 short_channel_id: Option<u64>,
325 /// Used to deduplicate block_connected callbacks
326 last_block_connected: Sha256dHash,
327 funding_tx_confirmations: u64,
329 their_dust_limit_satoshis: u64,
330 our_dust_limit_satoshis: u64,
331 their_max_htlc_value_in_flight_msat: u64,
332 //get_our_max_htlc_value_in_flight_msat(): u64,
333 their_channel_reserve_satoshis: u64,
334 //get_our_channel_reserve_satoshis(): u64,
335 their_htlc_minimum_msat: u64,
336 our_htlc_minimum_msat: u64,
337 their_to_self_delay: u16,
338 //implied by BREAKDOWN_TIMEOUT: our_to_self_delay: u16,
339 their_max_accepted_htlcs: u16,
340 //implied by OUR_MAX_HTLCS: our_max_accepted_htlcs: u16,
342 their_funding_pubkey: Option<PublicKey>,
343 their_revocation_basepoint: Option<PublicKey>,
344 their_payment_basepoint: Option<PublicKey>,
345 their_delayed_payment_basepoint: Option<PublicKey>,
346 their_htlc_basepoint: Option<PublicKey>,
347 their_cur_commitment_point: Option<PublicKey>,
349 their_prev_commitment_point: Option<PublicKey>,
350 their_node_id: PublicKey,
352 their_shutdown_scriptpubkey: Option<Script>,
354 channel_monitor: ChannelMonitor,
359 const OUR_MAX_HTLCS: u16 = 5; //TODO
360 /// Confirmation count threshold at which we close a channel. Ideally we'd keep the channel around
361 /// on ice until the funding transaction gets more confirmations, but the LN protocol doesn't
362 /// really allow for this, so instead we're stuck closing it out at that point.
363 const UNCONF_THRESHOLD: u32 = 6;
364 /// The amount of time we require our counterparty wait to claim their money (ie time between when
365 /// we, or our watchtower, must check for them having broadcast a theft transaction).
366 const BREAKDOWN_TIMEOUT: u16 = 6 * 24 * 7; //TODO?
367 /// The amount of time we're willing to wait to claim money back to us
368 const MAX_LOCAL_BREAKDOWN_TIMEOUT: u16 = 6 * 24 * 14;
369 const COMMITMENT_TX_BASE_WEIGHT: u64 = 724;
370 const COMMITMENT_TX_WEIGHT_PER_HTLC: u64 = 172;
371 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
372 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?)
373 /// Maximmum `funding_satoshis` value, according to the BOLT #2 specification
375 pub const MAX_FUNDING_SATOSHIS: u64 = (1 << 24);
377 /// Used to return a simple Error back to ChannelManager. Will get converted to a
378 /// msgs::ErrorAction::SendErrorMessage or msgs::ErrorAction::IgnoreError as appropriate with our
379 /// channel_id in ChannelManager.
380 pub(super) enum ChannelError {
381 Ignore(&'static str),
385 macro_rules! secp_call {
386 ( $res: expr, $err: expr, $chan_id: expr ) => {
389 Err(_) => return Err(HandleError {err: $err, action: Some(msgs::ErrorAction::SendErrorMessage {msg: msgs::ErrorMessage {channel_id: $chan_id, data: $err.to_string()}})})
394 macro_rules! secp_derived_key {
395 ( $res: expr, $chan_id: expr ) => {
396 secp_call!($res, "Derived invalid key, peer is maliciously selecting parameters", $chan_id)
400 // Convert constants + channel value to limits:
401 fn get_our_max_htlc_value_in_flight_msat(channel_value_satoshis: u64) -> u64 {
402 channel_value_satoshis * 1000 / 10 //TODO
405 /// Guaranteed to return a value no larger than channel_value_satoshis
406 fn get_our_channel_reserve_satoshis(channel_value_satoshis: u64) -> u64 {
407 let (q, _) = channel_value_satoshis.overflowing_div(100);
408 cmp::min(channel_value_satoshis, cmp::max(q, 1000)) //TODO
411 fn derive_our_dust_limit_satoshis(at_open_background_feerate: u64) -> u64 {
412 at_open_background_feerate * B_OUTPUT_PLUS_SPENDING_INPUT_WEIGHT / 1000 //TODO
415 fn derive_our_htlc_minimum_msat(_at_open_channel_feerate_per_kw: u64) -> u64 {
419 fn derive_minimum_depth(_channel_value_satoshis_msat: u64, _value_to_self_msat: u64) -> u32 {
420 // Note that in order to comply with BOLT 7 announcement_signatures requirements this must
422 const CONF_TARGET: u32 = 12; //TODO: Should be much higher
426 fn derive_maximum_minimum_depth(_channel_value_satoshis_msat: u64, _value_to_self_msat: u64) -> u32 {
427 const CONF_TARGET: u32 = 12; //TODO: Should be much higher
432 pub fn new_outbound(fee_estimator: &FeeEstimator, chan_keys: ChannelKeys, their_node_id: PublicKey, channel_value_satoshis: u64, push_msat: u64, announce_publicly: bool, user_id: u64, logger: Arc<Logger>) -> Result<Channel, APIError> {
433 if channel_value_satoshis >= MAX_FUNDING_SATOSHIS {
434 return Err(APIError::APIMisuseError{err: "funding value > 2^24"});
437 if push_msat > channel_value_satoshis * 1000 {
438 return Err(APIError::APIMisuseError{err: "push value > channel value"});
442 let background_feerate = fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Background);
443 if Channel::get_our_channel_reserve_satoshis(channel_value_satoshis) < Channel::derive_our_dust_limit_satoshis(background_feerate) {
444 return Err(APIError::FeeRateTooHigh{err: format!("Not enough reserve above dust limit can be found at current fee rate({})", background_feerate), feerate: background_feerate});
447 let feerate = fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Normal);
449 let secp_ctx = Secp256k1::new();
450 let our_channel_monitor_claim_key_hash = Hash160::from_data(&PublicKey::from_secret_key(&secp_ctx, &chan_keys.channel_monitor_claim_key).serialize());
451 let our_channel_monitor_claim_script = Builder::new().push_opcode(opcodes::All::OP_PUSHBYTES_0).push_slice(&our_channel_monitor_claim_key_hash[..]).into_script();
452 let channel_monitor = ChannelMonitor::new(&chan_keys.revocation_base_key,
453 &PublicKey::from_secret_key(&secp_ctx, &chan_keys.delayed_payment_base_key),
454 &chan_keys.htlc_base_key,
455 BREAKDOWN_TIMEOUT, our_channel_monitor_claim_script);
460 channel_id: rng::rand_u832(),
461 channel_state: ChannelState::OurInitSent as u32,
462 channel_outbound: true,
464 announce_publicly: announce_publicly,
465 channel_value_satoshis: channel_value_satoshis,
467 local_keys: chan_keys,
468 cur_local_commitment_transaction_number: INITIAL_COMMITMENT_NUMBER,
469 cur_remote_commitment_transaction_number: INITIAL_COMMITMENT_NUMBER,
470 value_to_self_msat: channel_value_satoshis * 1000 - push_msat,
471 pending_inbound_htlcs: Vec::new(),
472 pending_outbound_htlcs: Vec::new(),
473 holding_cell_htlc_updates: Vec::new(),
474 pending_update_fee: None,
475 holding_cell_update_fee: None,
476 next_local_htlc_id: 0,
477 next_remote_htlc_id: 0,
478 channel_update_count: 1,
480 last_local_commitment_txn: Vec::new(),
482 last_sent_closing_fee: None,
484 funding_tx_confirmed_in: None,
485 short_channel_id: None,
486 last_block_connected: Default::default(),
487 funding_tx_confirmations: 0,
489 feerate_per_kw: feerate,
490 their_dust_limit_satoshis: 0,
491 our_dust_limit_satoshis: Channel::derive_our_dust_limit_satoshis(background_feerate),
492 their_max_htlc_value_in_flight_msat: 0,
493 their_channel_reserve_satoshis: 0,
494 their_htlc_minimum_msat: 0,
495 our_htlc_minimum_msat: Channel::derive_our_htlc_minimum_msat(feerate),
496 their_to_self_delay: 0,
497 their_max_accepted_htlcs: 0,
499 their_funding_pubkey: None,
500 their_revocation_basepoint: None,
501 their_payment_basepoint: None,
502 their_delayed_payment_basepoint: None,
503 their_htlc_basepoint: None,
504 their_cur_commitment_point: None,
506 their_prev_commitment_point: None,
507 their_node_id: their_node_id,
509 their_shutdown_scriptpubkey: None,
511 channel_monitor: channel_monitor,
517 fn check_remote_fee(fee_estimator: &FeeEstimator, feerate_per_kw: u32) -> Result<(), ChannelError> {
518 if (feerate_per_kw as u64) < fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Background) {
519 return Err(ChannelError::Close("Peer's feerate much too low"));
521 if (feerate_per_kw as u64) > fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::HighPriority) * 2 {
522 return Err(ChannelError::Close("Peer's feerate much too high"));
527 /// Creates a new channel from a remote sides' request for one.
528 /// Assumes chain_hash has already been checked and corresponds with what we expect!
529 pub fn new_from_req(fee_estimator: &FeeEstimator, chan_keys: ChannelKeys, their_node_id: PublicKey, msg: &msgs::OpenChannel, user_id: u64, require_announce: bool, allow_announce: bool, logger: Arc<Logger>) -> Result<Channel, ChannelError> {
530 // Check sanity of message fields:
531 if msg.funding_satoshis >= MAX_FUNDING_SATOSHIS {
532 return Err(ChannelError::Close("funding value > 2^24"));
534 if msg.channel_reserve_satoshis > msg.funding_satoshis {
535 return Err(ChannelError::Close("Bogus channel_reserve_satoshis"));
537 if msg.push_msat > (msg.funding_satoshis - msg.channel_reserve_satoshis) * 1000 {
538 return Err(ChannelError::Close("push_msat larger than funding value"));
540 if msg.dust_limit_satoshis > msg.funding_satoshis {
541 return Err(ChannelError::Close("Peer never wants payout outputs?"));
543 if msg.dust_limit_satoshis > msg.channel_reserve_satoshis {
544 return Err(ChannelError::Close("Bogus; channel reserve is less than dust limit"));
546 if msg.htlc_minimum_msat >= (msg.funding_satoshis - msg.channel_reserve_satoshis) * 1000 {
547 return Err(ChannelError::Close("Miminum htlc value is full channel value"));
549 Channel::check_remote_fee(fee_estimator, msg.feerate_per_kw)?;
551 if msg.to_self_delay > MAX_LOCAL_BREAKDOWN_TIMEOUT {
552 return Err(ChannelError::Close("They wanted our payments to be delayed by a needlessly long period"));
554 if msg.max_accepted_htlcs < 1 {
555 return Err(ChannelError::Close("0 max_accpted_htlcs makes for a useless channel"));
557 if msg.max_accepted_htlcs > 483 {
558 return Err(ChannelError::Close("max_accpted_htlcs > 483"));
561 // Convert things into internal flags and prep our state:
563 let their_announce = if (msg.channel_flags & 1) == 1 { true } else { false };
564 if require_announce && !their_announce {
565 return Err(ChannelError::Close("Peer tried to open unannounced channel, but we require public ones"));
567 if !allow_announce && their_announce {
568 return Err(ChannelError::Close("Peer tried to open announced channel, but we require private ones"));
571 let background_feerate = fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Background);
573 let our_dust_limit_satoshis = Channel::derive_our_dust_limit_satoshis(background_feerate);
574 let our_channel_reserve_satoshis = Channel::get_our_channel_reserve_satoshis(msg.funding_satoshis);
575 if our_channel_reserve_satoshis < our_dust_limit_satoshis {
576 return Err(ChannelError::Close("Suitalbe channel reserve not found. aborting"));
578 if msg.channel_reserve_satoshis < our_dust_limit_satoshis {
579 return Err(ChannelError::Close("channel_reserve_satoshis too small"));
581 if our_channel_reserve_satoshis < msg.dust_limit_satoshis {
582 return Err(ChannelError::Close("Dust limit too high for our channel reserve"));
585 // check if the funder's amount for the initial commitment tx is sufficient
586 // for full fee payment
587 let funders_amount_msat = msg.funding_satoshis * 1000 - msg.push_msat;
588 if funders_amount_msat < background_feerate * COMMITMENT_TX_BASE_WEIGHT {
589 return Err(ChannelError::Close("Insufficient funding amount for initial commitment"));
592 let to_local_msat = msg.push_msat;
593 let to_remote_msat = funders_amount_msat - background_feerate * COMMITMENT_TX_BASE_WEIGHT;
594 if to_local_msat <= msg.channel_reserve_satoshis * 1000 && to_remote_msat <= our_channel_reserve_satoshis * 1000 {
595 return Err(ChannelError::Close("Insufficient funding amount for initial commitment"));
598 let secp_ctx = Secp256k1::new();
599 let our_channel_monitor_claim_key_hash = Hash160::from_data(&PublicKey::from_secret_key(&secp_ctx, &chan_keys.channel_monitor_claim_key).serialize());
600 let our_channel_monitor_claim_script = Builder::new().push_opcode(opcodes::All::OP_PUSHBYTES_0).push_slice(&our_channel_monitor_claim_key_hash[..]).into_script();
601 let mut channel_monitor = ChannelMonitor::new(&chan_keys.revocation_base_key,
602 &PublicKey::from_secret_key(&secp_ctx, &chan_keys.delayed_payment_base_key),
603 &chan_keys.htlc_base_key,
604 BREAKDOWN_TIMEOUT, our_channel_monitor_claim_script);
605 channel_monitor.set_their_base_keys(&msg.htlc_basepoint, &msg.delayed_payment_basepoint);
606 channel_monitor.set_their_to_self_delay(msg.to_self_delay);
608 let mut chan = Channel {
611 channel_id: msg.temporary_channel_id,
612 channel_state: (ChannelState::OurInitSent as u32) | (ChannelState::TheirInitSent as u32),
613 channel_outbound: false,
615 announce_publicly: their_announce,
617 local_keys: chan_keys,
618 cur_local_commitment_transaction_number: INITIAL_COMMITMENT_NUMBER,
619 cur_remote_commitment_transaction_number: INITIAL_COMMITMENT_NUMBER,
620 value_to_self_msat: msg.push_msat,
621 pending_inbound_htlcs: Vec::new(),
622 pending_outbound_htlcs: Vec::new(),
623 holding_cell_htlc_updates: Vec::new(),
624 pending_update_fee: None,
625 holding_cell_update_fee: None,
626 next_local_htlc_id: 0,
627 next_remote_htlc_id: 0,
628 channel_update_count: 1,
630 last_local_commitment_txn: Vec::new(),
632 last_sent_closing_fee: None,
634 funding_tx_confirmed_in: None,
635 short_channel_id: None,
636 last_block_connected: Default::default(),
637 funding_tx_confirmations: 0,
639 feerate_per_kw: msg.feerate_per_kw as u64,
640 channel_value_satoshis: msg.funding_satoshis,
641 their_dust_limit_satoshis: msg.dust_limit_satoshis,
642 our_dust_limit_satoshis: our_dust_limit_satoshis,
643 their_max_htlc_value_in_flight_msat: cmp::min(msg.max_htlc_value_in_flight_msat, msg.funding_satoshis * 1000),
644 their_channel_reserve_satoshis: msg.channel_reserve_satoshis,
645 their_htlc_minimum_msat: msg.htlc_minimum_msat,
646 our_htlc_minimum_msat: Channel::derive_our_htlc_minimum_msat(msg.feerate_per_kw as u64),
647 their_to_self_delay: msg.to_self_delay,
648 their_max_accepted_htlcs: msg.max_accepted_htlcs,
650 their_funding_pubkey: Some(msg.funding_pubkey),
651 their_revocation_basepoint: Some(msg.revocation_basepoint),
652 their_payment_basepoint: Some(msg.payment_basepoint),
653 their_delayed_payment_basepoint: Some(msg.delayed_payment_basepoint),
654 their_htlc_basepoint: Some(msg.htlc_basepoint),
655 their_cur_commitment_point: Some(msg.first_per_commitment_point),
657 their_prev_commitment_point: None,
658 their_node_id: their_node_id,
660 their_shutdown_scriptpubkey: None,
662 channel_monitor: channel_monitor,
667 let obscure_factor = chan.get_commitment_transaction_number_obscure_factor();
668 chan.channel_monitor.set_commitment_obscure_factor(obscure_factor);
673 // Utilities to derive keys:
675 fn build_local_commitment_secret(&self, idx: u64) -> SecretKey {
676 let res = chan_utils::build_commitment_secret(self.local_keys.commitment_seed, idx);
677 SecretKey::from_slice(&self.secp_ctx, &res).unwrap()
680 // Utilities to build transactions:
682 fn get_commitment_transaction_number_obscure_factor(&self) -> u64 {
683 let mut sha = Sha256::new();
684 let our_payment_basepoint = PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.payment_base_key);
686 if self.channel_outbound {
687 sha.input(&our_payment_basepoint.serialize());
688 sha.input(&self.their_payment_basepoint.unwrap().serialize());
690 sha.input(&self.their_payment_basepoint.unwrap().serialize());
691 sha.input(&our_payment_basepoint.serialize());
693 let mut res = [0; 32];
694 sha.result(&mut res);
696 ((res[26] as u64) << 5*8) |
697 ((res[27] as u64) << 4*8) |
698 ((res[28] as u64) << 3*8) |
699 ((res[29] as u64) << 2*8) |
700 ((res[30] as u64) << 1*8) |
701 ((res[31] as u64) << 0*8)
704 /// Transaction nomenclature is somewhat confusing here as there are many different cases - a
705 /// transaction is referred to as "a's transaction" implying that a will be able to broadcast
706 /// the transaction. Thus, b will generally be sending a signature over such a transaction to
707 /// a, and a can revoke the transaction by providing b the relevant per_commitment_secret. As
708 /// such, a transaction is generally the result of b increasing the amount paid to a (or adding
710 /// @local is used only to convert relevant internal structures which refer to remote vs local
711 /// to decide value of outputs and direction of HTLCs.
712 /// @generated_by_local is used to determine *which* HTLCs to include - noting that the HTLC
713 /// state may indicate that one peer has informed the other that they'd like to add an HTLC but
714 /// have not yet committed it. Such HTLCs will only be included in transactions which are being
715 /// generated by the peer which proposed adding the HTLCs, and thus we need to understand both
716 /// which peer generated this transaction and "to whom" this transaction flows.
718 fn build_commitment_transaction(&self, commitment_number: u64, keys: &TxCreationKeys, local: bool, generated_by_local: bool, feerate_per_kw: u64) -> (Transaction, Vec<HTLCOutputInCommitment>) {
719 let obscured_commitment_transaction_number = self.get_commitment_transaction_number_obscure_factor() ^ (INITIAL_COMMITMENT_NUMBER - commitment_number);
722 let mut ins: Vec<TxIn> = Vec::new();
724 previous_output: self.channel_monitor.get_funding_txo().unwrap().into_bitcoin_outpoint(),
725 script_sig: Script::new(),
726 sequence: ((0x80 as u32) << 8*3) | ((obscured_commitment_transaction_number >> 3*8) as u32),
732 let mut txouts: Vec<(TxOut, Option<HTLCOutputInCommitment>)> = Vec::with_capacity(self.pending_inbound_htlcs.len() + self.pending_outbound_htlcs.len() + 2);
734 let dust_limit_satoshis = if local { self.our_dust_limit_satoshis } else { self.their_dust_limit_satoshis };
735 let mut remote_htlc_total_msat = 0;
736 let mut local_htlc_total_msat = 0;
737 let mut value_to_self_msat_offset = 0;
739 macro_rules! add_htlc_output {
740 ($htlc: expr, $outbound: expr) => {
741 if $outbound == local { // "offered HTLC output"
742 if $htlc.amount_msat / 1000 >= dust_limit_satoshis + (feerate_per_kw * HTLC_TIMEOUT_TX_WEIGHT / 1000) {
743 let htlc_in_tx = get_htlc_in_commitment!($htlc, true);
745 script_pubkey: chan_utils::get_htlc_redeemscript(&htlc_in_tx, &keys).to_v0_p2wsh(),
746 value: $htlc.amount_msat / 1000
747 }, Some(htlc_in_tx)));
750 if $htlc.amount_msat / 1000 >= dust_limit_satoshis + (feerate_per_kw * HTLC_SUCCESS_TX_WEIGHT / 1000) {
751 let htlc_in_tx = get_htlc_in_commitment!($htlc, false);
752 txouts.push((TxOut { // "received HTLC output"
753 script_pubkey: chan_utils::get_htlc_redeemscript(&htlc_in_tx, &keys).to_v0_p2wsh(),
754 value: $htlc.amount_msat / 1000
755 }, Some(htlc_in_tx)));
761 for ref htlc in self.pending_inbound_htlcs.iter() {
762 let include = match htlc.state {
763 InboundHTLCState::RemoteAnnounced => !generated_by_local,
764 InboundHTLCState::AwaitingRemoteRevokeToAnnounce => !generated_by_local,
765 InboundHTLCState::AwaitingAnnouncedRemoteRevoke => true,
766 InboundHTLCState::Committed => true,
767 InboundHTLCState::LocalRemoved => !generated_by_local,
771 add_htlc_output!(htlc, false);
772 remote_htlc_total_msat += htlc.amount_msat;
775 InboundHTLCState::LocalRemoved => {
776 if generated_by_local && htlc.local_removed_fulfilled {
777 value_to_self_msat_offset += htlc.amount_msat as i64;
785 for ref htlc in self.pending_outbound_htlcs.iter() {
786 let include = match htlc.state {
787 OutboundHTLCState::LocalAnnounced => generated_by_local,
788 OutboundHTLCState::Committed => true,
789 OutboundHTLCState::RemoteRemoved => generated_by_local,
790 OutboundHTLCState::AwaitingRemoteRevokeToRemove => generated_by_local,
791 OutboundHTLCState::AwaitingRemovedRemoteRevoke => false,
795 add_htlc_output!(htlc, true);
796 local_htlc_total_msat += htlc.amount_msat;
799 OutboundHTLCState::AwaitingRemoteRevokeToRemove|OutboundHTLCState::AwaitingRemovedRemoteRevoke => {
800 if htlc.fail_reason.is_none() {
801 value_to_self_msat_offset -= htlc.amount_msat as i64;
804 OutboundHTLCState::RemoteRemoved => {
805 if !generated_by_local && htlc.fail_reason.is_none() {
806 value_to_self_msat_offset -= htlc.amount_msat as i64;
815 let total_fee: u64 = feerate_per_kw * (COMMITMENT_TX_BASE_WEIGHT + (txouts.len() as u64) * COMMITMENT_TX_WEIGHT_PER_HTLC) / 1000;
816 let value_to_self: i64 = ((self.value_to_self_msat - local_htlc_total_msat) as i64 + value_to_self_msat_offset) / 1000 - if self.channel_outbound { total_fee as i64 } else { 0 };
817 let value_to_remote: i64 = (((self.channel_value_satoshis * 1000 - self.value_to_self_msat - remote_htlc_total_msat) as i64 - value_to_self_msat_offset) / 1000) - if self.channel_outbound { 0 } else { total_fee as i64 };
819 let value_to_a = if local { value_to_self } else { value_to_remote };
820 let value_to_b = if local { value_to_remote } else { value_to_self };
822 if value_to_a >= (dust_limit_satoshis as i64) {
824 script_pubkey: chan_utils::get_revokeable_redeemscript(&keys.revocation_key,
825 if local { self.their_to_self_delay } else { BREAKDOWN_TIMEOUT },
826 &keys.a_delayed_payment_key).to_v0_p2wsh(),
827 value: value_to_a as u64
831 if value_to_b >= (dust_limit_satoshis as i64) {
833 script_pubkey: Builder::new().push_opcode(opcodes::All::OP_PUSHBYTES_0)
834 .push_slice(&Hash160::from_data(&keys.b_payment_key.serialize())[..])
836 value: value_to_b as u64
840 transaction_utils::sort_outputs(&mut txouts);
842 let mut outputs: Vec<TxOut> = Vec::with_capacity(txouts.len());
843 let mut htlcs_used: Vec<HTLCOutputInCommitment> = Vec::with_capacity(txouts.len());
844 for (idx, out) in txouts.drain(..).enumerate() {
846 if let Some(out_htlc) = out.1 {
847 htlcs_used.push(out_htlc);
848 htlcs_used.last_mut().unwrap().transaction_output_index = idx as u32;
854 lock_time: ((0x20 as u32) << 8*3) | ((obscured_commitment_transaction_number & 0xffffffu64) as u32),
861 fn get_closing_scriptpubkey(&self) -> Script {
862 let our_channel_close_key_hash = Hash160::from_data(&PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.channel_close_key).serialize());
863 Builder::new().push_opcode(opcodes::All::OP_PUSHBYTES_0).push_slice(&our_channel_close_key_hash[..]).into_script()
867 fn get_closing_transaction_weight(a_scriptpubkey: &Script, b_scriptpubkey: &Script) -> u64 {
868 (4 + 1 + 36 + 4 + 1 + 1 + 2*(8+1) + 4 + a_scriptpubkey.len() as u64 + b_scriptpubkey.len() as u64)*4 + 2 + 1 + 1 + 2*(1 + 72)
872 fn build_closing_transaction(&self, proposed_total_fee_satoshis: u64, skip_remote_output: bool) -> (Transaction, u64) {
874 let mut ins: Vec<TxIn> = Vec::new();
876 previous_output: self.channel_monitor.get_funding_txo().unwrap().into_bitcoin_outpoint(),
877 script_sig: Script::new(),
878 sequence: 0xffffffff,
884 assert!(self.pending_inbound_htlcs.is_empty());
885 assert!(self.pending_outbound_htlcs.is_empty());
886 let mut txouts: Vec<(TxOut, ())> = Vec::new();
888 let mut total_fee_satoshis = proposed_total_fee_satoshis;
889 let value_to_self: i64 = (self.value_to_self_msat as i64) / 1000 - if self.channel_outbound { total_fee_satoshis as i64 } else { 0 };
890 let value_to_remote: i64 = ((self.channel_value_satoshis * 1000 - self.value_to_self_msat) as i64 / 1000) - if self.channel_outbound { 0 } else { total_fee_satoshis as i64 };
892 if value_to_self < 0 {
893 assert!(self.channel_outbound);
894 total_fee_satoshis += (-value_to_self) as u64;
895 } else if value_to_remote < 0 {
896 assert!(!self.channel_outbound);
897 total_fee_satoshis += (-value_to_remote) as u64;
900 if !skip_remote_output && value_to_remote as u64 > self.our_dust_limit_satoshis {
902 script_pubkey: self.their_shutdown_scriptpubkey.clone().unwrap(),
903 value: value_to_remote as u64
907 if value_to_self as u64 > self.our_dust_limit_satoshis {
909 script_pubkey: self.get_closing_scriptpubkey(),
910 value: value_to_self as u64
914 transaction_utils::sort_outputs(&mut txouts);
916 let mut outputs: Vec<TxOut> = Vec::new();
917 for out in txouts.drain(..) {
926 }, total_fee_satoshis)
930 /// Creates a set of keys for build_commitment_transaction to generate a transaction which our
931 /// counterparty will sign (ie DO NOT send signatures over a transaction created by this to
932 /// our counterparty!)
933 /// The result is a transaction which we can revoke ownership of (ie a "local" transaction)
934 /// TODO Some magic rust shit to compile-time check this?
935 fn build_local_transaction_keys(&self, commitment_number: u64) -> Result<TxCreationKeys, HandleError> {
936 let per_commitment_point = PublicKey::from_secret_key(&self.secp_ctx, &self.build_local_commitment_secret(commitment_number));
937 let delayed_payment_base = PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.delayed_payment_base_key);
938 let htlc_basepoint = PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.htlc_base_key);
940 Ok(secp_derived_key!(TxCreationKeys::new(&self.secp_ctx, &per_commitment_point, &delayed_payment_base, &htlc_basepoint, &self.their_revocation_basepoint.unwrap(), &self.their_payment_basepoint.unwrap(), &self.their_htlc_basepoint.unwrap()), self.channel_id()))
944 /// Creates a set of keys for build_commitment_transaction to generate a transaction which we
945 /// will sign and send to our counterparty.
946 fn build_remote_transaction_keys(&self) -> Result<TxCreationKeys, HandleError> {
947 //TODO: Ensure that the payment_key derived here ends up in the library users' wallet as we
948 //may see payments to it!
949 let payment_basepoint = PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.payment_base_key);
950 let revocation_basepoint = PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.revocation_base_key);
951 let htlc_basepoint = PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.htlc_base_key);
953 Ok(secp_derived_key!(TxCreationKeys::new(&self.secp_ctx, &self.their_cur_commitment_point.unwrap(), &self.their_delayed_payment_basepoint.unwrap(), &self.their_htlc_basepoint.unwrap(), &revocation_basepoint, &payment_basepoint, &htlc_basepoint), self.channel_id()))
956 /// Gets the redeemscript for the funding transaction output (ie the funding transaction output
957 /// pays to get_funding_redeemscript().to_v0_p2wsh()).
958 /// Panics if called before accept_channel/new_from_req
959 pub fn get_funding_redeemscript(&self) -> Script {
960 let builder = Builder::new().push_opcode(opcodes::All::OP_PUSHNUM_2);
961 let our_funding_key = PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.funding_key).serialize();
962 let their_funding_key = self.their_funding_pubkey.expect("get_funding_redeemscript only allowed after accept_channel").serialize();
963 if our_funding_key[..] < their_funding_key[..] {
964 builder.push_slice(&our_funding_key)
965 .push_slice(&their_funding_key)
967 builder.push_slice(&their_funding_key)
968 .push_slice(&our_funding_key)
969 }.push_opcode(opcodes::All::OP_PUSHNUM_2).push_opcode(opcodes::All::OP_CHECKMULTISIG).into_script()
972 fn sign_commitment_transaction(&self, tx: &mut Transaction, their_sig: &Signature) -> Signature {
973 if tx.input.len() != 1 {
974 panic!("Tried to sign commitment transaction that had input count != 1!");
976 if tx.input[0].witness.len() != 0 {
977 panic!("Tried to re-sign commitment transaction");
980 let funding_redeemscript = self.get_funding_redeemscript();
982 let sighash = Message::from_slice(&bip143::SighashComponents::new(&tx).sighash_all(&tx.input[0], &funding_redeemscript, self.channel_value_satoshis)[..]).unwrap();
983 let our_sig = self.secp_ctx.sign(&sighash, &self.local_keys.funding_key);
985 tx.input[0].witness.push(Vec::new()); // First is the multisig dummy
987 let our_funding_key = PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.funding_key).serialize();
988 let their_funding_key = self.their_funding_pubkey.unwrap().serialize();
989 if our_funding_key[..] < their_funding_key[..] {
990 tx.input[0].witness.push(our_sig.serialize_der(&self.secp_ctx).to_vec());
991 tx.input[0].witness.push(their_sig.serialize_der(&self.secp_ctx).to_vec());
993 tx.input[0].witness.push(their_sig.serialize_der(&self.secp_ctx).to_vec());
994 tx.input[0].witness.push(our_sig.serialize_der(&self.secp_ctx).to_vec());
996 tx.input[0].witness[1].push(SigHashType::All as u8);
997 tx.input[0].witness[2].push(SigHashType::All as u8);
999 tx.input[0].witness.push(funding_redeemscript.into_bytes());
1004 /// Builds the htlc-success or htlc-timeout transaction which spends a given HTLC output
1005 /// @local is used only to convert relevant internal structures which refer to remote vs local
1006 /// to decide value of outputs and direction of HTLCs.
1007 fn build_htlc_transaction(&self, prev_hash: &Sha256dHash, htlc: &HTLCOutputInCommitment, local: bool, keys: &TxCreationKeys, feerate_per_kw: u64) -> Transaction {
1008 chan_utils::build_htlc_transaction(prev_hash, feerate_per_kw, if local { self.their_to_self_delay } else { BREAKDOWN_TIMEOUT }, htlc, &keys.a_delayed_payment_key, &keys.revocation_key)
1011 fn create_htlc_tx_signature(&self, tx: &Transaction, htlc: &HTLCOutputInCommitment, keys: &TxCreationKeys) -> Result<(Script, Signature, bool), HandleError> {
1012 if tx.input.len() != 1 {
1013 panic!("Tried to sign HTLC transaction that had input count != 1!");
1016 let htlc_redeemscript = chan_utils::get_htlc_redeemscript(&htlc, &keys);
1018 let our_htlc_key = secp_derived_key!(chan_utils::derive_private_key(&self.secp_ctx, &keys.per_commitment_point, &self.local_keys.htlc_base_key), self.channel_id());
1019 let sighash = Message::from_slice(&bip143::SighashComponents::new(&tx).sighash_all(&tx.input[0], &htlc_redeemscript, htlc.amount_msat / 1000)[..]).unwrap();
1020 let is_local_tx = PublicKey::from_secret_key(&self.secp_ctx, &our_htlc_key) == keys.a_htlc_key;
1021 Ok((htlc_redeemscript, self.secp_ctx.sign(&sighash, &our_htlc_key), is_local_tx))
1024 /// Signs a transaction created by build_htlc_transaction. If the transaction is an
1025 /// HTLC-Success transaction (ie htlc.offered is false), preimate must be set!
1026 fn sign_htlc_transaction(&self, tx: &mut Transaction, their_sig: &Signature, preimage: &Option<[u8; 32]>, htlc: &HTLCOutputInCommitment, keys: &TxCreationKeys) -> Result<Signature, HandleError> {
1027 if tx.input.len() != 1 {
1028 panic!("Tried to sign HTLC transaction that had input count != 1!");
1030 if tx.input[0].witness.len() != 0 {
1031 panic!("Tried to re-sign HTLC transaction");
1034 let (htlc_redeemscript, our_sig, local_tx) = self.create_htlc_tx_signature(tx, htlc, keys)?;
1036 tx.input[0].witness.push(Vec::new()); // First is the multisig dummy
1038 if local_tx { // b, then a
1039 tx.input[0].witness.push(their_sig.serialize_der(&self.secp_ctx).to_vec());
1040 tx.input[0].witness.push(our_sig.serialize_der(&self.secp_ctx).to_vec());
1042 tx.input[0].witness.push(our_sig.serialize_der(&self.secp_ctx).to_vec());
1043 tx.input[0].witness.push(their_sig.serialize_der(&self.secp_ctx).to_vec());
1045 tx.input[0].witness[1].push(SigHashType::All as u8);
1046 tx.input[0].witness[2].push(SigHashType::All as u8);
1049 tx.input[0].witness.push(Vec::new());
1051 tx.input[0].witness.push(preimage.unwrap().to_vec());
1054 tx.input[0].witness.push(htlc_redeemscript.into_bytes());
1059 /// May return an IgnoreError, but should not, and will always return Ok(_) when
1060 /// debug_assertions are turned on
1061 fn get_update_fulfill_htlc(&mut self, htlc_id_arg: u64, payment_preimage_arg: [u8; 32]) -> Result<(Option<msgs::UpdateFulfillHTLC>, Option<ChannelMonitor>), HandleError> {
1062 // Either ChannelFunded got set (which means it wont bet unset) or there is no way any
1063 // caller thought we could have something claimed (cause we wouldn't have accepted in an
1064 // incoming HTLC anyway). If we got to ShutdownComplete, callers aren't allowed to call us,
1066 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
1067 panic!("Was asked to fulfill an HTLC when channel was not in an operational state");
1069 assert_eq!(self.channel_state & ChannelState::ShutdownComplete as u32, 0);
1071 let mut sha = Sha256::new();
1072 sha.input(&payment_preimage_arg);
1073 let mut payment_hash_calc = [0; 32];
1074 sha.result(&mut payment_hash_calc);
1076 let mut pending_idx = std::usize::MAX;
1077 for (idx, htlc) in self.pending_inbound_htlcs.iter().enumerate() {
1078 if htlc.htlc_id == htlc_id_arg {
1079 assert_eq!(htlc.payment_hash, payment_hash_calc);
1080 if htlc.state != InboundHTLCState::Committed {
1081 debug_assert!(false, "Have an inbound HTLC we tried to claim before it was fully committed to");
1082 // Don't return in release mode here so that we can update channel_monitor
1088 if pending_idx == std::usize::MAX {
1089 debug_assert!(false, "Unable to find a pending HTLC which matched the given HTLC ID");
1090 return Err(HandleError{err: "Unable to find a pending HTLC which matched the given HTLC ID", action: Some(msgs::ErrorAction::IgnoreError)});
1093 // Now update local state:
1095 // We have to put the payment_preimage in the channel_monitor right away here to ensure we
1096 // can claim it even if the channel hits the chain before we see their next commitment.
1097 self.channel_monitor.provide_payment_preimage(&payment_hash_calc, &payment_preimage_arg);
1099 if (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32 | ChannelState::PeerDisconnected as u32)) != 0 {
1100 for pending_update in self.holding_cell_htlc_updates.iter() {
1101 match pending_update {
1102 &HTLCUpdateAwaitingACK::ClaimHTLC { htlc_id, .. } => {
1103 if htlc_id_arg == htlc_id {
1104 debug_assert!(false, "Tried to fulfill an HTLC we already had a pending fulfill for");
1105 return Ok((None, None));
1108 &HTLCUpdateAwaitingACK::FailHTLC { htlc_id, .. } => {
1109 if htlc_id_arg == htlc_id {
1110 debug_assert!(false, "Tried to fulfill an HTLC we already had a holding-cell failure on");
1111 return Err(HandleError{err: "Unable to find a pending HTLC which matched the given HTLC ID", action: Some(msgs::ErrorAction::IgnoreError)});
1117 self.holding_cell_htlc_updates.push(HTLCUpdateAwaitingACK::ClaimHTLC {
1118 payment_preimage: payment_preimage_arg, htlc_id: htlc_id_arg,
1120 return Ok((None, Some(self.channel_monitor.clone())));
1124 let htlc = &mut self.pending_inbound_htlcs[pending_idx];
1125 if htlc.state != InboundHTLCState::Committed {
1126 debug_assert!(false, "Have an inbound HTLC we tried to claim before it was fully committed to");
1127 return Ok((None, Some(self.channel_monitor.clone())));
1129 htlc.state = InboundHTLCState::LocalRemoved;
1130 htlc.local_removed_fulfilled = true;
1133 Ok((Some(msgs::UpdateFulfillHTLC {
1134 channel_id: self.channel_id(),
1135 htlc_id: htlc_id_arg,
1136 payment_preimage: payment_preimage_arg,
1137 }), Some(self.channel_monitor.clone())))
1140 pub fn get_update_fulfill_htlc_and_commit(&mut self, htlc_id: u64, payment_preimage: [u8; 32]) -> Result<(Option<(msgs::UpdateFulfillHTLC, msgs::CommitmentSigned)>, Option<ChannelMonitor>), HandleError> {
1141 match self.get_update_fulfill_htlc(htlc_id, payment_preimage)? {
1142 (Some(update_fulfill_htlc), _) => {
1143 let (commitment, monitor_update) = self.send_commitment_no_status_check()?;
1144 Ok((Some((update_fulfill_htlc, commitment)), Some(monitor_update)))
1146 (None, Some(channel_monitor)) => Ok((None, Some(channel_monitor))),
1147 (None, None) => Ok((None, None))
1151 /// May return an IgnoreError, but should not, and will always return Ok(_) when
1152 /// debug_assertions are turned on
1153 pub fn get_update_fail_htlc(&mut self, htlc_id_arg: u64, err_packet: msgs::OnionErrorPacket) -> Result<Option<msgs::UpdateFailHTLC>, HandleError> {
1154 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
1155 panic!("Was asked to fail an HTLC when channel was not in an operational state");
1157 assert_eq!(self.channel_state & ChannelState::ShutdownComplete as u32, 0);
1159 let mut pending_idx = std::usize::MAX;
1160 for (idx, htlc) in self.pending_inbound_htlcs.iter().enumerate() {
1161 if htlc.htlc_id == htlc_id_arg {
1162 if htlc.state != InboundHTLCState::Committed {
1163 debug_assert!(false, "Have an inbound HTLC we tried to fail before it was fully committed to");
1164 return Err(HandleError{err: "Unable to find a pending HTLC which matched the given HTLC ID", action: Some(msgs::ErrorAction::IgnoreError)});
1169 if pending_idx == std::usize::MAX {
1170 debug_assert!(false, "Unable to find a pending HTLC which matched the given HTLC ID");
1171 return Err(HandleError{err: "Unable to find a pending HTLC which matched the given HTLC ID", action: Some(msgs::ErrorAction::IgnoreError)});
1174 // Now update local state:
1175 if (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32 | ChannelState::PeerDisconnected as u32)) != 0 {
1176 for pending_update in self.holding_cell_htlc_updates.iter() {
1177 match pending_update {
1178 &HTLCUpdateAwaitingACK::ClaimHTLC { htlc_id, .. } => {
1179 if htlc_id_arg == htlc_id {
1180 debug_assert!(false, "Unable to find a pending HTLC which matched the given HTLC ID");
1181 return Err(HandleError{err: "Unable to find a pending HTLC which matched the given HTLC ID", action: Some(msgs::ErrorAction::IgnoreError)});
1184 &HTLCUpdateAwaitingACK::FailHTLC { htlc_id, .. } => {
1185 if htlc_id_arg == htlc_id {
1186 debug_assert!(false, "Tried to fail an HTLC that we already had a pending failure for");
1193 self.holding_cell_htlc_updates.push(HTLCUpdateAwaitingACK::FailHTLC {
1194 htlc_id: htlc_id_arg,
1201 let htlc = &mut self.pending_inbound_htlcs[pending_idx];
1202 htlc.state = InboundHTLCState::LocalRemoved;
1203 htlc.local_removed_fulfilled = false;
1206 Ok(Some(msgs::UpdateFailHTLC {
1207 channel_id: self.channel_id(),
1208 htlc_id: htlc_id_arg,
1213 pub fn get_update_fail_htlc_and_commit(&mut self, htlc_id: u64, err_packet: msgs::OnionErrorPacket) -> Result<Option<(msgs::UpdateFailHTLC, msgs::CommitmentSigned, ChannelMonitor)>, HandleError> {
1214 match self.get_update_fail_htlc(htlc_id, err_packet)? {
1215 Some(update_fail_htlc) => {
1216 let (commitment, monitor_update) = self.send_commitment_no_status_check()?;
1217 Ok(Some((update_fail_htlc, commitment, monitor_update)))
1223 // Message handlers:
1225 pub fn accept_channel(&mut self, msg: &msgs::AcceptChannel) -> Result<(), HandleError> {
1226 macro_rules! return_error_message {
1228 return Err(HandleError{err: $msg, action: Some(msgs::ErrorAction::SendErrorMessage{ msg: msgs::ErrorMessage { channel_id: msg.temporary_channel_id, data: $msg.to_string() }})});
1231 // Check sanity of message fields:
1232 if !self.channel_outbound {
1233 return_error_message!("Got an accept_channel message from an inbound peer");
1235 if self.channel_state != ChannelState::OurInitSent as u32 {
1236 return_error_message!("Got an accept_channel message at a strange time");
1238 if msg.dust_limit_satoshis > 21000000 * 100000000 {
1239 return_error_message!("Peer never wants payout outputs?");
1241 if msg.channel_reserve_satoshis > self.channel_value_satoshis {
1242 return_error_message!("Bogus channel_reserve_satoshis");
1244 if msg.dust_limit_satoshis > msg.channel_reserve_satoshis {
1245 return_error_message!("Bogus channel_reserve and dust_limit");
1247 if msg.channel_reserve_satoshis < self.our_dust_limit_satoshis {
1248 return_error_message!("Peer never wants payout outputs?");
1250 if msg.dust_limit_satoshis > Channel::get_our_channel_reserve_satoshis(self.channel_value_satoshis) {
1251 return_error_message!("Dust limit is bigger than our channel reverse");
1253 if msg.htlc_minimum_msat >= (self.channel_value_satoshis - msg.channel_reserve_satoshis) * 1000 {
1254 return_error_message!("Minimum htlc value is full channel value");
1256 if msg.minimum_depth > Channel::derive_maximum_minimum_depth(self.channel_value_satoshis*1000, self.value_to_self_msat) {
1257 return_error_message!("minimum_depth too large");
1259 if msg.to_self_delay > MAX_LOCAL_BREAKDOWN_TIMEOUT {
1260 return_error_message!("They wanted our payments to be delayed by a needlessly long period");
1262 if msg.max_accepted_htlcs < 1 {
1263 return_error_message!("0 max_accpted_htlcs makes for a useless channel");
1265 if msg.max_accepted_htlcs > 483 {
1266 return_error_message!("max_accpted_htlcs > 483");
1269 // TODO: Optional additional constraints mentioned in the spec
1270 // MAY fail the channel if
1271 // funding_satoshi is too small
1272 // htlc_minimum_msat too large
1273 // max_htlc_value_in_flight_msat too small
1274 // channel_reserve_satoshis too large
1275 // max_accepted_htlcs too small
1276 // dust_limit_satoshis too small
1278 self.channel_monitor.set_their_base_keys(&msg.htlc_basepoint, &msg.delayed_payment_basepoint);
1280 self.their_dust_limit_satoshis = msg.dust_limit_satoshis;
1281 self.their_max_htlc_value_in_flight_msat = cmp::min(msg.max_htlc_value_in_flight_msat, self.channel_value_satoshis * 1000);
1282 self.their_channel_reserve_satoshis = msg.channel_reserve_satoshis;
1283 self.their_htlc_minimum_msat = msg.htlc_minimum_msat;
1284 self.their_to_self_delay = msg.to_self_delay;
1285 self.their_max_accepted_htlcs = msg.max_accepted_htlcs;
1286 self.their_funding_pubkey = Some(msg.funding_pubkey);
1287 self.their_revocation_basepoint = Some(msg.revocation_basepoint);
1288 self.their_payment_basepoint = Some(msg.payment_basepoint);
1289 self.their_delayed_payment_basepoint = Some(msg.delayed_payment_basepoint);
1290 self.their_htlc_basepoint = Some(msg.htlc_basepoint);
1291 self.their_cur_commitment_point = Some(msg.first_per_commitment_point);
1293 let obscure_factor = self.get_commitment_transaction_number_obscure_factor();
1294 self.channel_monitor.set_commitment_obscure_factor(obscure_factor);
1295 self.channel_monitor.set_their_to_self_delay(msg.to_self_delay);
1297 self.channel_state = ChannelState::OurInitSent as u32 | ChannelState::TheirInitSent as u32;
1302 fn funding_created_signature(&mut self, sig: &Signature) -> Result<(Transaction, Signature), HandleError> {
1303 let funding_script = self.get_funding_redeemscript();
1305 let local_keys = self.build_local_transaction_keys(self.cur_local_commitment_transaction_number)?;
1306 let local_initial_commitment_tx = self.build_commitment_transaction(self.cur_local_commitment_transaction_number, &local_keys, true, false, self.feerate_per_kw).0;
1307 let local_sighash = Message::from_slice(&bip143::SighashComponents::new(&local_initial_commitment_tx).sighash_all(&local_initial_commitment_tx.input[0], &funding_script, self.channel_value_satoshis)[..]).unwrap();
1309 // They sign the "local" commitment transaction, allowing us to broadcast the tx if we wish.
1310 secp_call!(self.secp_ctx.verify(&local_sighash, &sig, &self.their_funding_pubkey.unwrap()), "Invalid funding_created signature from peer", self.channel_id());
1312 let remote_keys = self.build_remote_transaction_keys()?;
1313 let remote_initial_commitment_tx = self.build_commitment_transaction(self.cur_remote_commitment_transaction_number, &remote_keys, false, false, self.feerate_per_kw).0;
1314 let remote_sighash = Message::from_slice(&bip143::SighashComponents::new(&remote_initial_commitment_tx).sighash_all(&remote_initial_commitment_tx.input[0], &funding_script, self.channel_value_satoshis)[..]).unwrap();
1316 // We sign the "remote" commitment transaction, allowing them to broadcast the tx if they wish.
1317 Ok((remote_initial_commitment_tx, self.secp_ctx.sign(&remote_sighash, &self.local_keys.funding_key)))
1320 pub fn funding_created(&mut self, msg: &msgs::FundingCreated) -> Result<(msgs::FundingSigned, ChannelMonitor), HandleError> {
1321 if self.channel_outbound {
1322 return Err(HandleError{err: "Received funding_created for an outbound channel?", action: Some(msgs::ErrorAction::SendErrorMessage {msg: msgs::ErrorMessage {channel_id: self.channel_id, data: "Received funding_created for an outbound channel?".to_string()}})});
1324 if self.channel_state != (ChannelState::OurInitSent as u32 | ChannelState::TheirInitSent as u32) {
1325 // BOLT 2 says that if we disconnect before we send funding_signed we SHOULD NOT
1326 // remember the channel, so its safe to just send an error_message here and drop the
1328 return Err(HandleError{err: "Received funding_created after we got the channel!", action: Some(msgs::ErrorAction::SendErrorMessage {msg: msgs::ErrorMessage {channel_id: self.channel_id, data: "Received funding_created after we got the channel!".to_string()}})});
1330 if self.channel_monitor.get_min_seen_secret() != (1 << 48) ||
1331 self.cur_remote_commitment_transaction_number != INITIAL_COMMITMENT_NUMBER ||
1332 self.cur_local_commitment_transaction_number != INITIAL_COMMITMENT_NUMBER {
1333 panic!("Should not have advanced channel commitment tx numbers prior to funding_created");
1336 let funding_txo = OutPoint::new(msg.funding_txid, msg.funding_output_index);
1337 let funding_txo_script = self.get_funding_redeemscript().to_v0_p2wsh();
1338 self.channel_monitor.set_funding_info((funding_txo, funding_txo_script));
1340 let (remote_initial_commitment_tx, our_signature) = match self.funding_created_signature(&msg.signature) {
1343 self.channel_monitor.unset_funding_info();
1348 // Now that we're past error-generating stuff, update our local state:
1350 self.channel_monitor.provide_latest_remote_commitment_tx_info(&remote_initial_commitment_tx, Vec::new(), self.cur_remote_commitment_transaction_number);
1351 self.channel_state = ChannelState::FundingSent as u32;
1352 self.channel_id = funding_txo.to_channel_id();
1353 self.cur_remote_commitment_transaction_number -= 1;
1354 self.cur_local_commitment_transaction_number -= 1;
1356 Ok((msgs::FundingSigned {
1357 channel_id: self.channel_id,
1358 signature: our_signature
1359 }, self.channel_monitor.clone()))
1362 /// Handles a funding_signed message from the remote end.
1363 /// If this call is successful, broadcast the funding transaction (and not before!)
1364 pub fn funding_signed(&mut self, msg: &msgs::FundingSigned) -> Result<ChannelMonitor, HandleError> {
1365 if !self.channel_outbound {
1366 return Err(HandleError{err: "Received funding_signed for an inbound channel?", action: None});
1368 if self.channel_state != ChannelState::FundingCreated as u32 {
1369 return Err(HandleError{err: "Received funding_signed in strange state!", action: None});
1371 if self.channel_monitor.get_min_seen_secret() != (1 << 48) ||
1372 self.cur_remote_commitment_transaction_number != INITIAL_COMMITMENT_NUMBER - 1 ||
1373 self.cur_local_commitment_transaction_number != INITIAL_COMMITMENT_NUMBER {
1374 panic!("Should not have advanced channel commitment tx numbers prior to funding_created");
1377 let funding_script = self.get_funding_redeemscript();
1379 let local_keys = self.build_local_transaction_keys(self.cur_local_commitment_transaction_number)?;
1380 let mut local_initial_commitment_tx = self.build_commitment_transaction(self.cur_local_commitment_transaction_number, &local_keys, true, false, self.feerate_per_kw).0;
1381 let local_sighash = Message::from_slice(&bip143::SighashComponents::new(&local_initial_commitment_tx).sighash_all(&local_initial_commitment_tx.input[0], &funding_script, self.channel_value_satoshis)[..]).unwrap();
1383 // They sign the "local" commitment transaction, allowing us to broadcast the tx if we wish.
1384 secp_call!(self.secp_ctx.verify(&local_sighash, &msg.signature, &self.their_funding_pubkey.unwrap()), "Invalid funding_signed signature from peer", self.channel_id());
1386 self.sign_commitment_transaction(&mut local_initial_commitment_tx, &msg.signature);
1387 self.channel_monitor.provide_latest_local_commitment_tx_info(local_initial_commitment_tx.clone(), local_keys, self.feerate_per_kw, Vec::new());
1388 self.last_local_commitment_txn = vec![local_initial_commitment_tx];
1389 self.channel_state = ChannelState::FundingSent as u32;
1390 self.cur_local_commitment_transaction_number -= 1;
1392 Ok(self.channel_monitor.clone())
1395 pub fn funding_locked(&mut self, msg: &msgs::FundingLocked) -> Result<(), HandleError> {
1396 if self.channel_state & (ChannelState::PeerDisconnected as u32) == ChannelState::PeerDisconnected as u32 {
1397 return Err(HandleError{err: "Peer sent funding_locked when we needed a channel_reestablish", action: Some(msgs::ErrorAction::SendErrorMessage{msg: msgs::ErrorMessage{data: "Peer sent funding_locked when we needed a channel_reestablish".to_string(), channel_id: msg.channel_id}})});
1399 let non_shutdown_state = self.channel_state & (!BOTH_SIDES_SHUTDOWN_MASK);
1400 if non_shutdown_state == ChannelState::FundingSent as u32 {
1401 self.channel_state |= ChannelState::TheirFundingLocked as u32;
1402 } else if non_shutdown_state == (ChannelState::FundingSent as u32 | ChannelState::OurFundingLocked as u32) {
1403 self.channel_state = ChannelState::ChannelFunded as u32 | (self.channel_state & BOTH_SIDES_SHUTDOWN_MASK);
1404 self.channel_update_count += 1;
1405 } else if self.channel_state & (ChannelState::ChannelFunded as u32) != 0 &&
1406 // Note that funding_signed/funding_created will have decremented both by 1!
1407 self.cur_local_commitment_transaction_number == INITIAL_COMMITMENT_NUMBER - 1 &&
1408 self.cur_remote_commitment_transaction_number == INITIAL_COMMITMENT_NUMBER - 1 {
1409 if self.their_cur_commitment_point != Some(msg.next_per_commitment_point) {
1410 return Err(HandleError{err: "Peer sent a reconnect funding_locked with a different point", action: None});
1412 // They probably disconnected/reconnected and re-sent the funding_locked, which is required
1415 return Err(HandleError{err: "Peer sent a funding_locked at a strange time", action: None});
1418 self.their_prev_commitment_point = self.their_cur_commitment_point;
1419 self.their_cur_commitment_point = Some(msg.next_per_commitment_point);
1423 /// Returns (inbound_htlc_count, outbound_htlc_count, htlc_outbound_value_msat, htlc_inbound_value_msat)
1424 /// If its for a remote update check, we need to be more lax about checking against messages we
1425 /// sent but they may not have received/processed before they sent this message. Further, for
1426 /// our own sends, we're more conservative and even consider things they've removed against
1427 /// totals, though there is little reason to outside of further avoiding any race condition
1429 fn get_pending_htlc_stats(&self, for_remote_update_check: bool) -> (u32, u32, u64, u64) {
1430 //TODO: Can probably split this into inbound/outbound
1431 let mut inbound_htlc_count: u32 = 0;
1432 let mut outbound_htlc_count: u32 = 0;
1433 let mut htlc_outbound_value_msat = 0;
1434 let mut htlc_inbound_value_msat = 0;
1435 for ref htlc in self.pending_inbound_htlcs.iter() {
1437 InboundHTLCState::RemoteAnnounced => {},
1438 InboundHTLCState::AwaitingRemoteRevokeToAnnounce => {},
1439 InboundHTLCState::AwaitingAnnouncedRemoteRevoke => {},
1440 InboundHTLCState::Committed => {},
1441 InboundHTLCState::LocalRemoved => {},
1443 inbound_htlc_count += 1;
1444 htlc_inbound_value_msat += htlc.amount_msat;
1446 for ref htlc in self.pending_outbound_htlcs.iter() {
1448 OutboundHTLCState::LocalAnnounced => { if for_remote_update_check { continue; } },
1449 OutboundHTLCState::Committed => {},
1450 OutboundHTLCState::RemoteRemoved => { if for_remote_update_check { continue; } },
1451 OutboundHTLCState::AwaitingRemoteRevokeToRemove => { if for_remote_update_check { continue; } },
1452 OutboundHTLCState::AwaitingRemovedRemoteRevoke => { if for_remote_update_check { continue; } },
1454 outbound_htlc_count += 1;
1455 htlc_outbound_value_msat += htlc.amount_msat;
1458 (inbound_htlc_count, outbound_htlc_count, htlc_outbound_value_msat, htlc_inbound_value_msat)
1461 pub fn update_add_htlc(&mut self, msg: &msgs::UpdateAddHTLC, pending_forward_state: PendingHTLCStatus) -> Result<(), HandleError> {
1462 if (self.channel_state & (ChannelState::ChannelFunded as u32 | ChannelState::RemoteShutdownSent as u32)) != (ChannelState::ChannelFunded as u32) {
1463 return Err(HandleError{err: "Got add HTLC message when channel was not in an operational state", action: None});
1465 if self.channel_state & (ChannelState::PeerDisconnected as u32) == ChannelState::PeerDisconnected as u32 {
1466 return Err(HandleError{err: "Peer sent update_add_htlc when we needed a channel_reestablish", action: Some(msgs::ErrorAction::SendErrorMessage{msg: msgs::ErrorMessage{data: "Peer sent update_add_htlc when we needed a channel_reestablish".to_string(), channel_id: msg.channel_id}})});
1468 if msg.amount_msat > self.channel_value_satoshis * 1000 {
1469 return Err(HandleError{err: "Remote side tried to send more than the total value of the channel", action: None});
1471 if msg.amount_msat < self.our_htlc_minimum_msat {
1472 return Err(HandleError{err: "Remote side tried to send less than our minimum HTLC value", action: None});
1475 let (inbound_htlc_count, _, htlc_outbound_value_msat, htlc_inbound_value_msat) = self.get_pending_htlc_stats(true);
1476 if inbound_htlc_count + 1 > OUR_MAX_HTLCS as u32 {
1477 return Err(HandleError{err: "Remote tried to push more than our max accepted HTLCs", action: None});
1479 //TODO: Spec is unclear if this is per-direction or in total (I assume per direction):
1480 // Check our_max_htlc_value_in_flight_msat
1481 if htlc_inbound_value_msat + msg.amount_msat > Channel::get_our_max_htlc_value_in_flight_msat(self.channel_value_satoshis) {
1482 return Err(HandleError{err: "Remote HTLC add would put them over their max HTLC value in flight", action: None});
1484 // Check our_channel_reserve_satoshis (we're getting paid, so they have to at least meet
1485 // the reserve_satoshis we told them to always have as direct payment so that they lose
1486 // something if we punish them for broadcasting an old state).
1487 if htlc_inbound_value_msat + htlc_outbound_value_msat + msg.amount_msat + self.value_to_self_msat > (self.channel_value_satoshis - Channel::get_our_channel_reserve_satoshis(self.channel_value_satoshis)) * 1000 {
1488 return Err(HandleError{err: "Remote HTLC add would put them over their reserve value", action: None});
1490 if self.next_remote_htlc_id != msg.htlc_id {
1491 return Err(HandleError{err: "Remote skipped HTLC ID", action: None});
1493 if msg.cltv_expiry >= 500000000 {
1494 return Err(HandleError{err: "Remote provided CLTV expiry in seconds instead of block height", action: None});
1497 //TODO: Check msg.cltv_expiry further? Do this in channel manager?
1499 // Now update local state:
1500 self.next_remote_htlc_id += 1;
1501 self.pending_inbound_htlcs.push(InboundHTLCOutput {
1502 htlc_id: msg.htlc_id,
1503 amount_msat: msg.amount_msat,
1504 payment_hash: msg.payment_hash,
1505 cltv_expiry: msg.cltv_expiry,
1506 state: InboundHTLCState::RemoteAnnounced,
1507 local_removed_fulfilled: false,
1508 pending_forward_state: Some(pending_forward_state),
1514 /// Removes an outbound HTLC which has been commitment_signed by the remote end
1516 fn mark_outbound_htlc_removed(&mut self, htlc_id: u64, check_preimage: Option<[u8; 32]>, fail_reason: Option<HTLCFailReason>) -> Result<&HTLCSource, HandleError> {
1517 for htlc in self.pending_outbound_htlcs.iter_mut() {
1518 if htlc.htlc_id == htlc_id {
1519 match check_preimage {
1521 Some(payment_hash) =>
1522 if payment_hash != htlc.payment_hash {
1523 return Err(HandleError{err: "Remote tried to fulfill HTLC with an incorrect preimage", action: None});
1527 OutboundHTLCState::LocalAnnounced =>
1528 return Err(HandleError{err: "Remote tried to fulfill HTLC before it had been committed", action: None}),
1529 OutboundHTLCState::Committed => {
1530 htlc.state = OutboundHTLCState::RemoteRemoved;
1531 htlc.fail_reason = fail_reason;
1533 OutboundHTLCState::AwaitingRemoteRevokeToRemove | OutboundHTLCState::AwaitingRemovedRemoteRevoke | OutboundHTLCState::RemoteRemoved =>
1534 return Err(HandleError{err: "Remote tried to fulfill HTLC that they'd already fulfilled", action: None}),
1536 return Ok(&htlc.source);
1539 Err(HandleError{err: "Remote tried to fulfill/fail an HTLC we couldn't find", action: None})
1542 pub fn update_fulfill_htlc(&mut self, msg: &msgs::UpdateFulfillHTLC) -> Result<&HTLCSource, HandleError> {
1543 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
1544 return Err(HandleError{err: "Got add HTLC message when channel was not in an operational state", action: None});
1546 if self.channel_state & (ChannelState::PeerDisconnected as u32) == ChannelState::PeerDisconnected as u32 {
1547 return Err(HandleError{err: "Peer sent update_fulfill_htlc when we needed a channel_reestablish", action: Some(msgs::ErrorAction::SendErrorMessage{msg: msgs::ErrorMessage{data: "Peer sent update_fulfill_htlc when we needed a channel_reestablish".to_string(), channel_id: msg.channel_id}})});
1550 let mut sha = Sha256::new();
1551 sha.input(&msg.payment_preimage);
1552 let mut payment_hash = [0; 32];
1553 sha.result(&mut payment_hash);
1555 self.mark_outbound_htlc_removed(msg.htlc_id, Some(payment_hash), None)
1558 pub fn update_fail_htlc(&mut self, msg: &msgs::UpdateFailHTLC, fail_reason: HTLCFailReason) -> Result<&HTLCSource, HandleError> {
1559 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
1560 return Err(HandleError{err: "Got add HTLC message when channel was not in an operational state", action: None});
1562 if self.channel_state & (ChannelState::PeerDisconnected as u32) == ChannelState::PeerDisconnected as u32 {
1563 return Err(HandleError{err: "Peer sent update_fail_htlc when we needed a channel_reestablish", action: Some(msgs::ErrorAction::SendErrorMessage{msg: msgs::ErrorMessage{data: "Peer sent update_fail_htlc when we needed a channel_reestablish".to_string(), channel_id: msg.channel_id}})});
1566 self.mark_outbound_htlc_removed(msg.htlc_id, None, Some(fail_reason))
1569 pub fn update_fail_malformed_htlc<'a>(&mut self, msg: &msgs::UpdateFailMalformedHTLC, fail_reason: HTLCFailReason) -> Result<&HTLCSource, HandleError> {
1570 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
1571 return Err(HandleError{err: "Got add HTLC message when channel was not in an operational state", action: None});
1573 if self.channel_state & (ChannelState::PeerDisconnected as u32) == ChannelState::PeerDisconnected as u32 {
1574 return Err(HandleError{err: "Peer sent update_fail_malformed_htlc when we needed a channel_reestablish", action: Some(msgs::ErrorAction::SendErrorMessage{msg: msgs::ErrorMessage{data: "Peer sent update_fail_malformed_htlc when we needed a channel_reestablish".to_string(), channel_id: msg.channel_id}})});
1577 self.mark_outbound_htlc_removed(msg.htlc_id, None, Some(fail_reason))
1580 pub fn commitment_signed(&mut self, msg: &msgs::CommitmentSigned) -> Result<(msgs::RevokeAndACK, Option<msgs::CommitmentSigned>, ChannelMonitor), HandleError> {
1581 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
1582 return Err(HandleError{err: "Got commitment signed message when channel was not in an operational state", action: None});
1584 if self.channel_state & (ChannelState::PeerDisconnected as u32) == ChannelState::PeerDisconnected as u32 {
1585 return Err(HandleError{err: "Peer sent commitment_signed when we needed a channel_reestablish", action: Some(msgs::ErrorAction::SendErrorMessage{msg: msgs::ErrorMessage{data: "Peer sent commitment_signed when we needed a channel_reestablish".to_string(), channel_id: msg.channel_id}})});
1588 let funding_script = self.get_funding_redeemscript();
1590 let local_keys = self.build_local_transaction_keys(self.cur_local_commitment_transaction_number)?;
1592 let feerate_per_kw = if !self.channel_outbound && self.pending_update_fee.is_some() {
1593 self.pending_update_fee.unwrap()
1598 let mut local_commitment_tx = self.build_commitment_transaction(self.cur_local_commitment_transaction_number, &local_keys, true, false, feerate_per_kw);
1599 let local_commitment_txid = local_commitment_tx.0.txid();
1600 let local_sighash = Message::from_slice(&bip143::SighashComponents::new(&local_commitment_tx.0).sighash_all(&local_commitment_tx.0.input[0], &funding_script, self.channel_value_satoshis)[..]).unwrap();
1601 secp_call!(self.secp_ctx.verify(&local_sighash, &msg.signature, &self.their_funding_pubkey.unwrap()), "Invalid commitment tx signature from peer", self.channel_id());
1603 if msg.htlc_signatures.len() != local_commitment_tx.1.len() {
1604 return Err(HandleError{err: "Got wrong number of HTLC signatures from remote", action: None});
1607 let mut new_local_commitment_txn = Vec::with_capacity(local_commitment_tx.1.len() + 1);
1608 self.sign_commitment_transaction(&mut local_commitment_tx.0, &msg.signature);
1609 new_local_commitment_txn.push(local_commitment_tx.0.clone());
1611 let mut htlcs_and_sigs = Vec::with_capacity(local_commitment_tx.1.len());
1612 for (idx, ref htlc) in local_commitment_tx.1.iter().enumerate() {
1613 let mut htlc_tx = self.build_htlc_transaction(&local_commitment_txid, htlc, true, &local_keys, feerate_per_kw);
1614 let htlc_redeemscript = chan_utils::get_htlc_redeemscript(&htlc, &local_keys);
1615 let htlc_sighash = Message::from_slice(&bip143::SighashComponents::new(&htlc_tx).sighash_all(&htlc_tx.input[0], &htlc_redeemscript, htlc.amount_msat / 1000)[..]).unwrap();
1616 secp_call!(self.secp_ctx.verify(&htlc_sighash, &msg.htlc_signatures[idx], &local_keys.b_htlc_key), "Invalid HTLC tx siganture from peer", self.channel_id());
1617 let htlc_sig = if htlc.offered {
1618 let htlc_sig = self.sign_htlc_transaction(&mut htlc_tx, &msg.htlc_signatures[idx], &None, htlc, &local_keys)?;
1619 new_local_commitment_txn.push(htlc_tx);
1622 self.create_htlc_tx_signature(&htlc_tx, htlc, &local_keys)?.1
1624 htlcs_and_sigs.push(((*htlc).clone(), msg.htlc_signatures[idx], htlc_sig));
1627 let next_per_commitment_point = PublicKey::from_secret_key(&self.secp_ctx, &self.build_local_commitment_secret(self.cur_local_commitment_transaction_number - 1));
1628 let per_commitment_secret = chan_utils::build_commitment_secret(self.local_keys.commitment_seed, self.cur_local_commitment_transaction_number + 1);
1630 // Update state now that we've passed all the can-fail calls...
1631 let mut need_our_commitment = false;
1632 if !self.channel_outbound {
1633 if let Some(fee_update) = self.pending_update_fee {
1634 self.feerate_per_kw = fee_update;
1635 // We later use the presence of pending_update_fee to indicate we should generate a
1636 // commitment_signed upon receipt of revoke_and_ack, so we can only set it to None
1637 // if we're not awaiting a revoke (ie will send a commitment_signed now).
1638 if (self.channel_state & ChannelState::AwaitingRemoteRevoke as u32) == 0 {
1639 need_our_commitment = true;
1640 self.pending_update_fee = None;
1645 self.channel_monitor.provide_latest_local_commitment_tx_info(local_commitment_tx.0, local_keys, self.feerate_per_kw, htlcs_and_sigs);
1647 for htlc in self.pending_inbound_htlcs.iter_mut() {
1648 if htlc.state == InboundHTLCState::RemoteAnnounced {
1649 htlc.state = InboundHTLCState::AwaitingRemoteRevokeToAnnounce;
1650 need_our_commitment = true;
1653 for htlc in self.pending_outbound_htlcs.iter_mut() {
1654 if htlc.state == OutboundHTLCState::RemoteRemoved {
1655 htlc.state = OutboundHTLCState::AwaitingRemoteRevokeToRemove;
1656 need_our_commitment = true;
1660 self.cur_local_commitment_transaction_number -= 1;
1661 self.last_local_commitment_txn = new_local_commitment_txn;
1663 let (our_commitment_signed, monitor_update) = if need_our_commitment && (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32)) == 0 {
1664 // If we're AwaitingRemoteRevoke we can't send a new commitment here, but that's ok -
1665 // we'll send one right away when we get the revoke_and_ack when we
1666 // free_holding_cell_htlcs().
1667 let (msg, monitor) = self.send_commitment_no_status_check()?;
1668 (Some(msg), monitor)
1669 } else { (None, self.channel_monitor.clone()) };
1671 Ok((msgs::RevokeAndACK {
1672 channel_id: self.channel_id,
1673 per_commitment_secret: per_commitment_secret,
1674 next_per_commitment_point: next_per_commitment_point,
1675 }, our_commitment_signed, monitor_update))
1678 /// Used to fulfill holding_cell_htlcs when we get a remote ack (or implicitly get it by them
1679 /// fulfilling or failing the last pending HTLC)
1680 fn free_holding_cell_htlcs(&mut self) -> Result<Option<(msgs::CommitmentUpdate, ChannelMonitor)>, HandleError> {
1681 if self.holding_cell_htlc_updates.len() != 0 || self.holding_cell_update_fee.is_some() {
1682 let mut htlc_updates = Vec::new();
1683 mem::swap(&mut htlc_updates, &mut self.holding_cell_htlc_updates);
1684 let mut update_add_htlcs = Vec::with_capacity(htlc_updates.len());
1685 let mut update_fulfill_htlcs = Vec::with_capacity(htlc_updates.len());
1686 let mut update_fail_htlcs = Vec::with_capacity(htlc_updates.len());
1688 for htlc_update in htlc_updates.drain(..) {
1689 // Note that this *can* fail, though it should be due to rather-rare conditions on
1690 // fee races with adding too many outputs which push our total payments just over
1691 // the limit. In case its less rare than I anticipate, we may want to revisit
1692 // handling this case better and maybe fufilling some of the HTLCs while attempting
1693 // to rebalance channels.
1694 if err.is_some() { // We're back to AwaitingRemoteRevoke (or are about to fail the channel)
1695 self.holding_cell_htlc_updates.push(htlc_update);
1697 match &htlc_update {
1698 &HTLCUpdateAwaitingACK::AddHTLC {amount_msat, cltv_expiry, payment_hash, ref source, ref onion_routing_packet, ..} => {
1699 match self.send_htlc(amount_msat, payment_hash, cltv_expiry, source.clone(), onion_routing_packet.clone()) {
1700 Ok(update_add_msg_option) => update_add_htlcs.push(update_add_msg_option.unwrap()),
1706 &HTLCUpdateAwaitingACK::ClaimHTLC { payment_preimage, htlc_id, .. } => {
1707 match self.get_update_fulfill_htlc(htlc_id, payment_preimage) {
1708 Ok(update_fulfill_msg_option) => update_fulfill_htlcs.push(update_fulfill_msg_option.0.unwrap()),
1710 if let Some(msgs::ErrorAction::IgnoreError) = e.action {}
1712 panic!("Got a non-IgnoreError action trying to fulfill holding cell HTLC");
1717 &HTLCUpdateAwaitingACK::FailHTLC { htlc_id, ref err_packet } => {
1718 match self.get_update_fail_htlc(htlc_id, err_packet.clone()) {
1719 Ok(update_fail_msg_option) => update_fail_htlcs.push(update_fail_msg_option.unwrap()),
1721 if let Some(msgs::ErrorAction::IgnoreError) = e.action {}
1723 panic!("Got a non-IgnoreError action trying to fail holding cell HTLC");
1730 self.holding_cell_htlc_updates.push(htlc_update);
1734 //TODO: Need to examine the type of err - if its a fee issue or similar we may want to
1735 //fail it back the route, if its a temporary issue we can ignore it...
1738 if update_add_htlcs.is_empty() && update_fulfill_htlcs.is_empty() && update_fail_htlcs.is_empty() && self.holding_cell_update_fee.is_none() {
1739 // This should never actually happen and indicates we got some Errs back
1740 // from update_fulfill_htlc/update_fail_htlc, but we handle it anyway in
1741 // case there is some strange way to hit duplicate HTLC removes.
1744 let update_fee = if let Some(feerate) = self.holding_cell_update_fee {
1745 self.pending_update_fee = self.holding_cell_update_fee.take();
1746 Some(msgs::UpdateFee {
1747 channel_id: self.channel_id,
1748 feerate_per_kw: feerate as u32,
1753 let (commitment_signed, monitor_update) = self.send_commitment_no_status_check()?;
1754 Ok(Some((msgs::CommitmentUpdate {
1756 update_fulfill_htlcs,
1758 update_fail_malformed_htlcs: Vec::new(),
1759 update_fee: update_fee,
1761 }, monitor_update)))
1770 /// Handles receiving a remote's revoke_and_ack. Note that we may return a new
1771 /// commitment_signed message here in case we had pending outbound HTLCs to add which were
1772 /// waiting on this revoke_and_ack. The generation of this new commitment_signed may also fail,
1773 /// generating an appropriate error *after* the channel state has been updated based on the
1774 /// revoke_and_ack message.
1775 pub fn revoke_and_ack(&mut self, msg: &msgs::RevokeAndACK) -> Result<(Option<msgs::CommitmentUpdate>, Vec<(PendingForwardHTLCInfo, u64)>, Vec<(HTLCSource, [u8; 32], HTLCFailReason)>, ChannelMonitor), HandleError> {
1776 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
1777 return Err(HandleError{err: "Got revoke/ACK message when channel was not in an operational state", action: None});
1779 if self.channel_state & (ChannelState::PeerDisconnected as u32) == ChannelState::PeerDisconnected as u32 {
1780 return Err(HandleError{err: "Peer sent revoke_and_ack when we needed a channel_reestablish", action: Some(msgs::ErrorAction::SendErrorMessage{msg: msgs::ErrorMessage{data: "Peer sent revoke_and_ack when we needed a channel_reestablish".to_string(), channel_id: msg.channel_id}})});
1782 if let Some(their_prev_commitment_point) = self.their_prev_commitment_point {
1783 if PublicKey::from_secret_key(&self.secp_ctx, &secp_call!(SecretKey::from_slice(&self.secp_ctx, &msg.per_commitment_secret), "Peer provided an invalid per_commitment_secret", self.channel_id())) != their_prev_commitment_point {
1784 return Err(HandleError{err: "Got a revoke commitment secret which didn't correspond to their current pubkey", action: None});
1787 self.channel_monitor.provide_secret(self.cur_remote_commitment_transaction_number + 1, msg.per_commitment_secret, Some((self.cur_remote_commitment_transaction_number - 1, msg.next_per_commitment_point)))?;
1789 // Update state now that we've passed all the can-fail calls...
1790 // (note that we may still fail to generate the new commitment_signed message, but that's
1791 // OK, we step the channel here and *then* if the new generation fails we can fail the
1792 // channel based on that, but stepping stuff here should be safe either way.
1793 self.channel_state &= !(ChannelState::AwaitingRemoteRevoke as u32);
1794 self.their_prev_commitment_point = self.their_cur_commitment_point;
1795 self.their_cur_commitment_point = Some(msg.next_per_commitment_point);
1796 self.cur_remote_commitment_transaction_number -= 1;
1798 let mut to_forward_infos = Vec::new();
1799 let mut revoked_htlcs = Vec::new();
1800 let mut update_fail_htlcs = Vec::new();
1801 let mut update_fail_malformed_htlcs = Vec::new();
1802 let mut require_commitment = false;
1803 let mut value_to_self_msat_diff: i64 = 0;
1804 // We really shouldnt have two passes here, but retain gives a non-mutable ref (Rust bug)
1805 self.pending_inbound_htlcs.retain(|htlc| {
1806 if htlc.state == InboundHTLCState::LocalRemoved {
1807 if htlc.local_removed_fulfilled {
1808 value_to_self_msat_diff += htlc.amount_msat as i64;
1813 self.pending_outbound_htlcs.retain(|htlc| {
1814 if htlc.state == OutboundHTLCState::AwaitingRemovedRemoteRevoke {
1815 if let Some(reason) = htlc.fail_reason.clone() { // We really want take() here, but, again, non-mut ref :(
1816 revoked_htlcs.push((htlc.source.clone(), htlc.payment_hash, reason));
1818 // They fulfilled, so we sent them money
1819 value_to_self_msat_diff -= htlc.amount_msat as i64;
1824 for htlc in self.pending_inbound_htlcs.iter_mut() {
1825 if htlc.state == InboundHTLCState::AwaitingRemoteRevokeToAnnounce {
1826 htlc.state = InboundHTLCState::AwaitingAnnouncedRemoteRevoke;
1827 require_commitment = true;
1828 } else if htlc.state == InboundHTLCState::AwaitingAnnouncedRemoteRevoke {
1829 match htlc.pending_forward_state.take().unwrap() {
1830 PendingHTLCStatus::Fail(fail_msg) => {
1831 htlc.state = InboundHTLCState::LocalRemoved;
1832 require_commitment = true;
1834 HTLCFailureMsg::Relay(msg) => update_fail_htlcs.push(msg),
1835 HTLCFailureMsg::Malformed(msg) => update_fail_malformed_htlcs.push(msg),
1838 PendingHTLCStatus::Forward(forward_info) => {
1839 to_forward_infos.push((forward_info, htlc.htlc_id));
1840 htlc.state = InboundHTLCState::Committed;
1845 for htlc in self.pending_outbound_htlcs.iter_mut() {
1846 if htlc.state == OutboundHTLCState::LocalAnnounced {
1847 htlc.state = OutboundHTLCState::Committed;
1848 } else if htlc.state == OutboundHTLCState::AwaitingRemoteRevokeToRemove {
1849 htlc.state = OutboundHTLCState::AwaitingRemovedRemoteRevoke;
1850 require_commitment = true;
1853 self.value_to_self_msat = (self.value_to_self_msat as i64 + value_to_self_msat_diff) as u64;
1855 if self.channel_outbound {
1856 if let Some(feerate) = self.pending_update_fee.take() {
1857 self.feerate_per_kw = feerate;
1860 if let Some(feerate) = self.pending_update_fee {
1861 // Because a node cannot send two commitment_signed's in a row without getting a
1862 // revoke_and_ack from us (as it would otherwise not know the per_commitment_point
1863 // it should use to create keys with) and because a node can't send a
1864 // commitment_signed without changes, checking if the feerate is equal to the
1865 // pending feerate update is sufficient to detect require_commitment.
1866 if feerate == self.feerate_per_kw {
1867 require_commitment = true;
1868 self.pending_update_fee = None;
1873 match self.free_holding_cell_htlcs()? {
1874 Some(mut commitment_update) => {
1875 commitment_update.0.update_fail_htlcs.reserve(update_fail_htlcs.len());
1876 for fail_msg in update_fail_htlcs.drain(..) {
1877 commitment_update.0.update_fail_htlcs.push(fail_msg);
1879 commitment_update.0.update_fail_malformed_htlcs.reserve(update_fail_malformed_htlcs.len());
1880 for fail_msg in update_fail_malformed_htlcs.drain(..) {
1881 commitment_update.0.update_fail_malformed_htlcs.push(fail_msg);
1883 Ok((Some(commitment_update.0), to_forward_infos, revoked_htlcs, commitment_update.1))
1886 if require_commitment {
1887 let (commitment_signed, monitor_update) = self.send_commitment_no_status_check()?;
1888 Ok((Some(msgs::CommitmentUpdate {
1889 update_add_htlcs: Vec::new(),
1890 update_fulfill_htlcs: Vec::new(),
1892 update_fail_malformed_htlcs,
1895 }), to_forward_infos, revoked_htlcs, monitor_update))
1897 Ok((None, to_forward_infos, revoked_htlcs, self.channel_monitor.clone()))
1904 /// Adds a pending update to this channel. See the doc for send_htlc for
1905 /// further details on the optionness of the return value.
1906 /// You MUST call send_commitment prior to any other calls on this Channel
1907 fn send_update_fee(&mut self, feerate_per_kw: u64) -> Option<msgs::UpdateFee> {
1908 if !self.channel_outbound {
1909 panic!("Cannot send fee from inbound channel");
1912 if !self.is_usable() {
1913 panic!("Cannot update fee until channel is fully established and we haven't started shutting down");
1916 if (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32)) == (ChannelState::AwaitingRemoteRevoke as u32) {
1917 self.holding_cell_update_fee = Some(feerate_per_kw);
1921 debug_assert!(self.pending_update_fee.is_none());
1922 self.pending_update_fee = Some(feerate_per_kw);
1924 Some(msgs::UpdateFee {
1925 channel_id: self.channel_id,
1926 feerate_per_kw: feerate_per_kw as u32,
1930 pub fn send_update_fee_and_commit(&mut self, feerate_per_kw: u64) -> Result<Option<(msgs::UpdateFee, msgs::CommitmentSigned, ChannelMonitor)>, HandleError> {
1931 match self.send_update_fee(feerate_per_kw) {
1932 Some(update_fee) => {
1933 let (commitment_signed, monitor_update) = self.send_commitment_no_status_check()?;
1934 Ok(Some((update_fee, commitment_signed, monitor_update)))
1940 /// Removes any uncommitted HTLCs, to be used on peer disconnection, including any pending
1941 /// HTLCs that we intended to add but haven't as we were waiting on a remote revoke.
1942 /// Returns the set of PendingHTLCStatuses from remote uncommitted HTLCs (which we're
1943 /// implicitly dropping) and the payment_hashes of HTLCs we tried to add but are dropping.
1944 /// No further message handling calls may be made until a channel_reestablish dance has
1946 pub fn remove_uncommitted_htlcs_and_mark_paused(&mut self) -> Vec<(HTLCSource, [u8; 32])> {
1947 let mut outbound_drops = Vec::new();
1949 assert_eq!(self.channel_state & ChannelState::ShutdownComplete as u32, 0);
1950 if self.channel_state < ChannelState::FundingSent as u32 {
1951 self.channel_state = ChannelState::ShutdownComplete as u32;
1952 return outbound_drops;
1955 let mut inbound_drop_count = 0;
1956 self.pending_inbound_htlcs.retain(|htlc| {
1958 InboundHTLCState::RemoteAnnounced => {
1959 // They sent us an update_add_htlc but we never got the commitment_signed.
1960 // We'll tell them what commitment_signed we're expecting next and they'll drop
1961 // this HTLC accordingly
1962 inbound_drop_count += 1;
1965 InboundHTLCState::AwaitingRemoteRevokeToAnnounce|InboundHTLCState::AwaitingAnnouncedRemoteRevoke => {
1966 // Same goes for AwaitingRemoteRevokeToRemove and AwaitingRemovedRemoteRevoke
1967 // We received a commitment_signed updating this HTLC and (at least hopefully)
1968 // sent a revoke_and_ack (which we can re-transmit) and have heard nothing
1969 // in response to it yet, so don't touch it.
1972 InboundHTLCState::Committed => true,
1973 InboundHTLCState::LocalRemoved => { // Same goes for LocalAnnounced
1974 // We (hopefully) sent a commitment_signed updating this HTLC (which we can
1975 // re-transmit if needed) and they may have even sent a revoke_and_ack back
1976 // (that we missed). Keep this around for now and if they tell us they missed
1977 // the commitment_signed we can re-transmit the update then.
1983 for htlc in self.pending_outbound_htlcs.iter_mut() {
1984 if htlc.state == OutboundHTLCState::RemoteRemoved {
1985 // They sent us an update to remove this but haven't yet sent the corresponding
1986 // commitment_signed, we need to move it back to Committed and they can re-send
1987 // the update upon reconnection.
1988 htlc.state = OutboundHTLCState::Committed;
1992 self.holding_cell_htlc_updates.retain(|htlc_update| {
1994 &HTLCUpdateAwaitingACK::AddHTLC { ref payment_hash, ref source, .. } => {
1995 outbound_drops.push((source.clone(), payment_hash.clone()));
1998 &HTLCUpdateAwaitingACK::ClaimHTLC {..} | &HTLCUpdateAwaitingACK::FailHTLC {..} => true,
2001 self.channel_state |= ChannelState::PeerDisconnected as u32;
2002 log_debug!(self, "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()));
2006 pub fn update_fee(&mut self, fee_estimator: &FeeEstimator, msg: &msgs::UpdateFee) -> Result<(), ChannelError> {
2007 if self.channel_outbound {
2008 return Err(ChannelError::Close("Non-funding remote tried to update channel fee"));
2010 if self.channel_state & (ChannelState::PeerDisconnected as u32) == ChannelState::PeerDisconnected as u32 {
2011 return Err(ChannelError::Close("Peer sent update_fee when we needed a channel_reestablish"));
2013 Channel::check_remote_fee(fee_estimator, msg.feerate_per_kw)?;
2015 self.pending_update_fee = Some(msg.feerate_per_kw as u64);
2016 self.channel_update_count += 1;
2020 /// May panic if some calls other than message-handling calls (which will all Err immediately)
2021 /// have been called between remove_uncommitted_htlcs_and_mark_paused and this call.
2022 pub fn channel_reestablish(&mut self, msg: &msgs::ChannelReestablish) -> Result<(Option<msgs::FundingLocked>, Option<msgs::RevokeAndACK>, Option<msgs::CommitmentUpdate>, Option<ChannelMonitor>), HandleError> {
2023 if self.channel_state & (ChannelState::PeerDisconnected as u32) == 0 {
2024 return Err(HandleError{err: "Peer sent a loose channel_reestablish not after reconnect", action: Some(msgs::ErrorAction::SendErrorMessage{msg: msgs::ErrorMessage{data: "Peer sent a loose channel_reestablish not after reconnect".to_string(), channel_id: msg.channel_id}})});
2027 if msg.next_local_commitment_number == 0 || msg.next_local_commitment_number >= INITIAL_COMMITMENT_NUMBER ||
2028 msg.next_remote_commitment_number == 0 || msg.next_remote_commitment_number >= INITIAL_COMMITMENT_NUMBER {
2029 return Err(HandleError{err: "Peer send garbage channel_reestablish", action: Some(msgs::ErrorAction::SendErrorMessage{msg: msgs::ErrorMessage{data: "Peer send garbage channel_reestablish".to_string(), channel_id: msg.channel_id}})});
2032 // Go ahead and unmark PeerDisconnected as various calls we may make check for it (and all
2033 // remaining cases either succeed or ErrorMessage-fail).
2034 self.channel_state &= !(ChannelState::PeerDisconnected as u32);
2036 let mut required_revoke = None;
2037 if msg.next_remote_commitment_number == INITIAL_COMMITMENT_NUMBER - self.cur_local_commitment_transaction_number {
2038 // Remote isn't waiting on any RevokeAndACK from us!
2039 // Note that if we need to repeat our FundingLocked we'll do that in the next if block.
2040 } else if msg.next_remote_commitment_number == (INITIAL_COMMITMENT_NUMBER - 1) - self.cur_local_commitment_transaction_number {
2041 let next_per_commitment_point = PublicKey::from_secret_key(&self.secp_ctx, &self.build_local_commitment_secret(self.cur_local_commitment_transaction_number));
2042 let per_commitment_secret = chan_utils::build_commitment_secret(self.local_keys.commitment_seed, self.cur_local_commitment_transaction_number + 2);
2043 required_revoke = Some(msgs::RevokeAndACK {
2044 channel_id: self.channel_id,
2045 per_commitment_secret,
2046 next_per_commitment_point,
2049 return Err(HandleError{err: "Peer attempted to reestablish channel with a very old local commitment transaction", action: Some(msgs::ErrorAction::SendErrorMessage{msg: msgs::ErrorMessage{data: "Peer attempted to reestablish channel with a very old remote commitment transaction".to_string(), channel_id: msg.channel_id}})});
2052 if msg.next_local_commitment_number == INITIAL_COMMITMENT_NUMBER - self.cur_remote_commitment_transaction_number {
2053 if msg.next_remote_commitment_number == INITIAL_COMMITMENT_NUMBER - self.cur_local_commitment_transaction_number {
2054 log_debug!(self, "Reconnected channel {} with no lost commitment txn", log_bytes!(self.channel_id()));
2055 if msg.next_local_commitment_number == 1 && msg.next_remote_commitment_number == 1 {
2056 let next_per_commitment_secret = self.build_local_commitment_secret(self.cur_local_commitment_transaction_number);
2057 let next_per_commitment_point = PublicKey::from_secret_key(&self.secp_ctx, &next_per_commitment_secret);
2058 return Ok((Some(msgs::FundingLocked {
2059 channel_id: self.channel_id(),
2060 next_per_commitment_point: next_per_commitment_point,
2061 }), None, None, None));
2065 if (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32)) == 0 {
2066 // We're up-to-date and not waiting on a remote revoke (if we are our
2067 // channel_reestablish should result in them sending a revoke_and_ack), but we may
2068 // have received some updates while we were disconnected. Free the holding cell
2070 match self.free_holding_cell_htlcs() {
2072 if let &Some(msgs::ErrorAction::DisconnectPeer{msg: Some(_)}) = &e.action {
2073 } else if let &Some(msgs::ErrorAction::SendErrorMessage{msg: _}) = &e.action {
2075 panic!("Got non-channel-failing result from free_holding_cell_htlcs");
2079 Ok(Some((commitment_update, channel_monitor))) => return Ok((None, required_revoke, Some(commitment_update), Some(channel_monitor))),
2080 Ok(None) => return Ok((None, required_revoke, None, None)),
2083 return Ok((None, required_revoke, None, None));
2085 } else if msg.next_local_commitment_number == (INITIAL_COMMITMENT_NUMBER - 1) - self.cur_remote_commitment_transaction_number {
2086 return Ok((None, required_revoke,
2087 Some(msgs::CommitmentUpdate {
2088 update_add_htlcs: Vec::new(),
2089 update_fulfill_htlcs: Vec::new(),
2090 update_fail_htlcs: Vec::new(),
2091 update_fail_malformed_htlcs: Vec::new(),
2093 commitment_signed: self.send_commitment_no_state_update().expect("It looks like we failed to re-generate a commitment_signed we had previously sent?").0,
2096 return Err(HandleError{err: "Peer attempted to reestablish channel with a very old remote commitment transaction", action: Some(msgs::ErrorAction::SendErrorMessage{msg: msgs::ErrorMessage{data: "Peer attempted to reestablish channel with a very old remote commitment transaction".to_string(), channel_id: msg.channel_id}})});
2100 pub fn shutdown(&mut self, fee_estimator: &FeeEstimator, msg: &msgs::Shutdown) -> Result<(Option<msgs::Shutdown>, Option<msgs::ClosingSigned>, Vec<(HTLCSource, [u8; 32])>), HandleError> {
2101 if self.channel_state & (ChannelState::PeerDisconnected as u32) == ChannelState::PeerDisconnected as u32 {
2102 return Err(HandleError{err: "Peer sent shutdown when we needed a channel_reestablish", action: Some(msgs::ErrorAction::SendErrorMessage{msg: msgs::ErrorMessage{data: "Peer sent shutdown when we needed a channel_reestablish".to_string(), channel_id: msg.channel_id}})});
2104 if self.channel_state < ChannelState::FundingSent as u32 {
2105 self.channel_state = ChannelState::ShutdownComplete as u32;
2106 self.channel_update_count += 1;
2107 return Ok((None, None, Vec::new()));
2109 for htlc in self.pending_inbound_htlcs.iter() {
2110 if htlc.state == InboundHTLCState::RemoteAnnounced {
2111 return Err(HandleError{err: "Got shutdown with remote pending HTLCs", action: None});
2114 if (self.channel_state & ChannelState::RemoteShutdownSent as u32) == ChannelState::RemoteShutdownSent as u32 {
2115 return Err(HandleError{err: "Remote peer sent duplicate shutdown message", action: None});
2117 assert_eq!(self.channel_state & ChannelState::ShutdownComplete as u32, 0);
2119 // BOLT 2 says we must only send a scriptpubkey of certain standard forms, which are up to
2120 // 34 bytes in length, so dont let the remote peer feed us some super fee-heavy script.
2121 if self.channel_outbound && msg.scriptpubkey.len() > 34 {
2122 return Err(HandleError{err: "Got shutdown_scriptpubkey of absurd length from remote peer", action: None});
2125 //Check shutdown_scriptpubkey form as BOLT says we must
2126 if !(msg.scriptpubkey.is_p2pkh()) && !(msg.scriptpubkey.is_p2sh())
2127 && !(msg.scriptpubkey.is_v0_p2wpkh()) && !(msg.scriptpubkey.is_v0_p2wsh()){
2128 return Err(HandleError{err: "Got an invalid scriptpubkey from remote peer", action: Some(msgs::ErrorAction::DisconnectPeer{ msg: None })});
2131 if self.their_shutdown_scriptpubkey.is_some() {
2132 if Some(&msg.scriptpubkey) != self.their_shutdown_scriptpubkey.as_ref() {
2133 return Err(HandleError{err: "Got shutdown request with a scriptpubkey which did not match their previous scriptpubkey", action: None});
2136 self.their_shutdown_scriptpubkey = Some(msg.scriptpubkey.clone());
2139 let our_closing_script = self.get_closing_scriptpubkey();
2141 let (proposed_feerate, proposed_fee, our_sig) = if self.channel_outbound && self.pending_inbound_htlcs.is_empty() && self.pending_outbound_htlcs.is_empty() {
2142 let mut proposed_feerate = fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Background);
2143 if self.feerate_per_kw > proposed_feerate {
2144 proposed_feerate = self.feerate_per_kw;
2146 let tx_weight = Self::get_closing_transaction_weight(&our_closing_script, &msg.scriptpubkey);
2147 let proposed_total_fee_satoshis = proposed_feerate * tx_weight / 1000;
2149 let (closing_tx, total_fee_satoshis) = self.build_closing_transaction(proposed_total_fee_satoshis, false);
2150 let funding_redeemscript = self.get_funding_redeemscript();
2151 let sighash = Message::from_slice(&bip143::SighashComponents::new(&closing_tx).sighash_all(&closing_tx.input[0], &funding_redeemscript, self.channel_value_satoshis)[..]).unwrap();
2153 (Some(proposed_feerate), Some(total_fee_satoshis), Some(self.secp_ctx.sign(&sighash, &self.local_keys.funding_key)))
2154 } else { (None, None, None) };
2156 // From here on out, we may not fail!
2158 self.channel_state |= ChannelState::RemoteShutdownSent as u32;
2159 self.channel_update_count += 1;
2161 // We can't send our shutdown until we've committed all of our pending HTLCs, but the
2162 // remote side is unlikely to accept any new HTLCs, so we go ahead and "free" any holding
2163 // cell HTLCs and return them to fail the payment.
2164 let mut dropped_outbound_htlcs = Vec::with_capacity(self.holding_cell_htlc_updates.len());
2165 self.holding_cell_htlc_updates.retain(|htlc_update| {
2167 &HTLCUpdateAwaitingACK::AddHTLC { ref payment_hash, ref source, .. } => {
2168 dropped_outbound_htlcs.push((source.clone(), payment_hash.clone()));
2174 for htlc in self.pending_outbound_htlcs.iter() {
2175 if htlc.state == OutboundHTLCState::LocalAnnounced {
2176 return Ok((None, None, dropped_outbound_htlcs));
2180 let our_shutdown = if (self.channel_state & ChannelState::LocalShutdownSent as u32) == ChannelState::LocalShutdownSent as u32 {
2183 Some(msgs::Shutdown {
2184 channel_id: self.channel_id,
2185 scriptpubkey: our_closing_script,
2189 self.channel_state |= ChannelState::LocalShutdownSent as u32;
2190 self.channel_update_count += 1;
2191 if self.pending_inbound_htlcs.is_empty() && self.pending_outbound_htlcs.is_empty() && self.channel_outbound {
2192 // There are no more HTLCs and we're the funder, this means we start the closing_signed
2193 // dance with an initial fee proposal!
2194 self.last_sent_closing_fee = Some((proposed_feerate.unwrap(), proposed_fee.unwrap()));
2195 Ok((our_shutdown, Some(msgs::ClosingSigned {
2196 channel_id: self.channel_id,
2197 fee_satoshis: proposed_fee.unwrap(),
2198 signature: our_sig.unwrap(),
2199 }), dropped_outbound_htlcs))
2201 Ok((our_shutdown, None, dropped_outbound_htlcs))
2205 pub fn closing_signed(&mut self, fee_estimator: &FeeEstimator, msg: &msgs::ClosingSigned) -> Result<(Option<msgs::ClosingSigned>, Option<Transaction>), HandleError> {
2206 if self.channel_state & BOTH_SIDES_SHUTDOWN_MASK != BOTH_SIDES_SHUTDOWN_MASK {
2207 return Err(HandleError{err: "Remote end sent us a closing_signed before both sides provided a shutdown", action: None});
2209 if self.channel_state & (ChannelState::PeerDisconnected as u32) == ChannelState::PeerDisconnected as u32 {
2210 return Err(HandleError{err: "Peer sent closing_signed when we needed a channel_reestablish", action: Some(msgs::ErrorAction::SendErrorMessage{msg: msgs::ErrorMessage{data: "Peer sent closing_signed when we needed a channel_reestablish".to_string(), channel_id: msg.channel_id}})});
2212 if !self.pending_inbound_htlcs.is_empty() || !self.pending_outbound_htlcs.is_empty() {
2213 return Err(HandleError{err: "Remote end sent us a closing_signed while there were still pending HTLCs", action: None});
2215 if msg.fee_satoshis > 21000000 * 10000000 { //this is required to stop potential overflow in build_closing_transaction
2216 return Err(HandleError{err: "Remote tried to send us a closing tx with > 21 million BTC fee", action: None});
2219 let funding_redeemscript = self.get_funding_redeemscript();
2220 let (mut closing_tx, used_total_fee) = self.build_closing_transaction(msg.fee_satoshis, false);
2221 if used_total_fee != msg.fee_satoshis {
2222 return Err(HandleError{err: "Remote sent us a closing_signed with a fee greater than the value they can claim", action: None});
2224 let mut sighash = Message::from_slice(&bip143::SighashComponents::new(&closing_tx).sighash_all(&closing_tx.input[0], &funding_redeemscript, self.channel_value_satoshis)[..]).unwrap();
2226 match self.secp_ctx.verify(&sighash, &msg.signature, &self.their_funding_pubkey.unwrap()) {
2229 // The remote end may have decided to revoke their output due to inconsistent dust
2230 // limits, so check for that case by re-checking the signature here.
2231 closing_tx = self.build_closing_transaction(msg.fee_satoshis, true).0;
2232 sighash = Message::from_slice(&bip143::SighashComponents::new(&closing_tx).sighash_all(&closing_tx.input[0], &funding_redeemscript, self.channel_value_satoshis)[..]).unwrap();
2233 secp_call!(self.secp_ctx.verify(&sighash, &msg.signature, &self.their_funding_pubkey.unwrap()), "Invalid closing tx signature from peer", self.channel_id());
2237 if let Some((_, last_fee)) = self.last_sent_closing_fee {
2238 if last_fee == msg.fee_satoshis {
2239 self.sign_commitment_transaction(&mut closing_tx, &msg.signature);
2240 self.channel_state = ChannelState::ShutdownComplete as u32;
2241 self.channel_update_count += 1;
2242 return Ok((None, Some(closing_tx)));
2246 macro_rules! propose_new_feerate {
2247 ($new_feerate: expr) => {
2248 let closing_tx_max_weight = Self::get_closing_transaction_weight(&self.get_closing_scriptpubkey(), self.their_shutdown_scriptpubkey.as_ref().unwrap());
2249 let (closing_tx, used_total_fee) = self.build_closing_transaction($new_feerate * closing_tx_max_weight / 1000, false);
2250 sighash = Message::from_slice(&bip143::SighashComponents::new(&closing_tx).sighash_all(&closing_tx.input[0], &funding_redeemscript, self.channel_value_satoshis)[..]).unwrap();
2251 let our_sig = self.secp_ctx.sign(&sighash, &self.local_keys.funding_key);
2252 self.last_sent_closing_fee = Some(($new_feerate, used_total_fee));
2253 return Ok((Some(msgs::ClosingSigned {
2254 channel_id: self.channel_id,
2255 fee_satoshis: used_total_fee,
2261 let proposed_sat_per_kw = msg.fee_satoshis * 1000 / closing_tx.get_weight();
2262 if self.channel_outbound {
2263 let our_max_feerate = fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Normal);
2264 if proposed_sat_per_kw > our_max_feerate {
2265 if let Some((last_feerate, _)) = self.last_sent_closing_fee {
2266 if our_max_feerate <= last_feerate {
2267 return Err(HandleError{err: "Unable to come to consensus about closing feerate, remote wanted something higher than our Normal feerate", action: None});
2270 propose_new_feerate!(our_max_feerate);
2273 let our_min_feerate = fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Background);
2274 if proposed_sat_per_kw < our_min_feerate {
2275 if let Some((last_feerate, _)) = self.last_sent_closing_fee {
2276 if our_min_feerate >= last_feerate {
2277 return Err(HandleError{err: "Unable to come to consensus about closing feerate, remote wanted something lower than our Background feerate", action: None});
2280 propose_new_feerate!(our_min_feerate);
2284 let our_sig = self.sign_commitment_transaction(&mut closing_tx, &msg.signature);
2285 self.channel_state = ChannelState::ShutdownComplete as u32;
2286 self.channel_update_count += 1;
2288 Ok((Some(msgs::ClosingSigned {
2289 channel_id: self.channel_id,
2290 fee_satoshis: msg.fee_satoshis,
2292 }), Some(closing_tx)))
2295 // Public utilities:
2297 pub fn channel_id(&self) -> [u8; 32] {
2301 /// Gets the "user_id" value passed into the construction of this channel. It has no special
2302 /// meaning and exists only to allow users to have a persistent identifier of a channel.
2303 pub fn get_user_id(&self) -> u64 {
2307 /// May only be called after funding has been initiated (ie is_funding_initiated() is true)
2308 pub fn channel_monitor(&self) -> ChannelMonitor {
2309 if self.channel_state < ChannelState::FundingCreated as u32 {
2310 panic!("Can't get a channel monitor until funding has been created");
2312 self.channel_monitor.clone()
2315 /// Guaranteed to be Some after both FundingLocked messages have been exchanged (and, thus,
2316 /// is_usable() returns true).
2317 /// Allowed in any state (including after shutdown)
2318 pub fn get_short_channel_id(&self) -> Option<u64> {
2319 self.short_channel_id
2322 /// Returns the funding_txo we either got from our peer, or were given by
2323 /// get_outbound_funding_created.
2324 pub fn get_funding_txo(&self) -> Option<OutPoint> {
2325 self.channel_monitor.get_funding_txo()
2328 /// Allowed in any state (including after shutdown)
2329 pub fn get_their_node_id(&self) -> PublicKey {
2333 /// Allowed in any state (including after shutdown)
2334 pub fn get_our_htlc_minimum_msat(&self) -> u64 {
2335 self.our_htlc_minimum_msat
2338 pub fn get_value_satoshis(&self) -> u64 {
2339 self.channel_value_satoshis
2343 pub fn get_feerate(&self) -> u64 {
2347 //TODO: Testing purpose only, should be changed in another way after #81
2349 pub fn get_local_keys(&self) -> &ChannelKeys {
2353 /// Allowed in any state (including after shutdown)
2354 pub fn get_channel_update_count(&self) -> u32 {
2355 self.channel_update_count
2358 pub fn should_announce(&self) -> bool {
2359 self.announce_publicly
2362 pub fn is_outbound(&self) -> bool {
2363 self.channel_outbound
2366 /// Gets the fee we'd want to charge for adding an HTLC output to this Channel
2367 /// Allowed in any state (including after shutdown)
2368 pub fn get_our_fee_base_msat(&self, fee_estimator: &FeeEstimator) -> u32 {
2369 // For lack of a better metric, we calculate what it would cost to consolidate the new HTLC
2370 // output value back into a transaction with the regular channel output:
2372 // the fee cost of the HTLC-Success/HTLC-Timeout transaction:
2373 let mut res = self.feerate_per_kw * cmp::max(HTLC_TIMEOUT_TX_WEIGHT, HTLC_SUCCESS_TX_WEIGHT) / 1000;
2375 if self.channel_outbound {
2376 // + the marginal fee increase cost to us in the commitment transaction:
2377 res += self.feerate_per_kw * COMMITMENT_TX_WEIGHT_PER_HTLC / 1000;
2380 // + the marginal cost of an input which spends the HTLC-Success/HTLC-Timeout output:
2381 res += fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Normal) * SPENDING_INPUT_FOR_A_OUTPUT_WEIGHT / 1000;
2386 /// Returns true if we've ever received a message from the remote end for this Channel
2387 pub fn have_received_message(&self) -> bool {
2388 self.channel_state > (ChannelState::OurInitSent as u32)
2391 /// Returns true if this channel is fully established and not known to be closing.
2392 /// Allowed in any state (including after shutdown)
2393 pub fn is_usable(&self) -> bool {
2394 let mask = ChannelState::ChannelFunded as u32 | BOTH_SIDES_SHUTDOWN_MASK;
2395 (self.channel_state & mask) == (ChannelState::ChannelFunded as u32)
2398 /// Returns true if this channel is currently available for use. This is a superset of
2399 /// is_usable() and considers things like the channel being temporarily disabled.
2400 /// Allowed in any state (including after shutdown)
2401 pub fn is_live(&self) -> bool {
2402 self.is_usable() && (self.channel_state & (ChannelState::PeerDisconnected as u32) == 0)
2405 /// Returns true if funding_created was sent/received.
2406 pub fn is_funding_initiated(&self) -> bool {
2407 self.channel_state >= ChannelState::FundingCreated as u32
2410 /// Returns true if this channel is fully shut down. True here implies that no further actions
2411 /// may/will be taken on this channel, and thus this object should be freed. Any future changes
2412 /// will be handled appropriately by the chain monitor.
2413 pub fn is_shutdown(&self) -> bool {
2414 if (self.channel_state & ChannelState::ShutdownComplete as u32) == ChannelState::ShutdownComplete as u32 {
2415 assert!(self.channel_state == ChannelState::ShutdownComplete as u32);
2420 /// Called by channelmanager based on chain blocks being connected.
2421 /// Note that we only need to use this to detect funding_signed, anything else is handled by
2422 /// the channel_monitor.
2423 /// In case of Err, the channel may have been closed, at which point the standard requirements
2424 /// apply - no calls may be made except those explicitly stated to be allowed post-shutdown.
2425 /// Only returns an ErrorAction of DisconnectPeer, if Err.
2426 pub fn block_connected(&mut self, header: &BlockHeader, height: u32, txn_matched: &[&Transaction], indexes_of_txn_matched: &[u32]) -> Result<Option<msgs::FundingLocked>, HandleError> {
2427 let non_shutdown_state = self.channel_state & (!BOTH_SIDES_SHUTDOWN_MASK);
2428 if self.funding_tx_confirmations > 0 {
2429 if header.bitcoin_hash() != self.last_block_connected {
2430 self.last_block_connected = header.bitcoin_hash();
2431 self.funding_tx_confirmations += 1;
2432 if self.funding_tx_confirmations == Channel::derive_minimum_depth(self.channel_value_satoshis*1000, self.value_to_self_msat) as u64 {
2433 let need_commitment_update = if non_shutdown_state == ChannelState::FundingSent as u32 {
2434 self.channel_state |= ChannelState::OurFundingLocked as u32;
2436 } else if non_shutdown_state == (ChannelState::FundingSent as u32 | ChannelState::TheirFundingLocked as u32) {
2437 self.channel_state = ChannelState::ChannelFunded as u32 | (self.channel_state & BOTH_SIDES_SHUTDOWN_MASK);
2438 self.channel_update_count += 1;
2440 } else if self.channel_state == (ChannelState::FundingSent as u32 | ChannelState::OurFundingLocked as u32) {
2441 // We got a reorg but not enough to trigger a force close, just update
2442 // funding_tx_confirmed_in and return.
2444 } else if self.channel_state < ChannelState::ChannelFunded as u32 {
2445 panic!("Started confirming a channel in a state pre-FundingSent?: {}", self.channel_state);
2447 // We got a reorg but not enough to trigger a force close, just update
2448 // funding_tx_confirmed_in and return.
2451 self.funding_tx_confirmed_in = Some(header.bitcoin_hash());
2453 //TODO: Note that this must be a duplicate of the previous commitment point they sent us,
2454 //as otherwise we will have a commitment transaction that they can't revoke (well, kinda,
2455 //they can by sending two revoke_and_acks back-to-back, but not really). This appears to be
2456 //a protocol oversight, but I assume I'm just missing something.
2457 if need_commitment_update {
2458 let next_per_commitment_secret = self.build_local_commitment_secret(self.cur_local_commitment_transaction_number);
2459 let next_per_commitment_point = PublicKey::from_secret_key(&self.secp_ctx, &next_per_commitment_secret);
2460 return Ok(Some(msgs::FundingLocked {
2461 channel_id: self.channel_id,
2462 next_per_commitment_point: next_per_commitment_point,
2468 if non_shutdown_state & !(ChannelState::TheirFundingLocked as u32) == ChannelState::FundingSent as u32 {
2469 for (ref tx, index_in_block) in txn_matched.iter().zip(indexes_of_txn_matched) {
2470 if tx.txid() == self.channel_monitor.get_funding_txo().unwrap().txid {
2471 let txo_idx = self.channel_monitor.get_funding_txo().unwrap().index as usize;
2472 if txo_idx >= tx.output.len() || tx.output[txo_idx].script_pubkey != self.get_funding_redeemscript().to_v0_p2wsh() ||
2473 tx.output[txo_idx].value != self.channel_value_satoshis {
2474 if self.channel_outbound {
2475 // If we generated the funding transaction and it doesn't match what it
2476 // should, the client is really broken and we should just panic and
2477 // tell them off. That said, because hash collisions happen with high
2478 // probability in fuzztarget mode, if we're fuzzing we just close the
2479 // channel and move on.
2480 #[cfg(not(feature = "fuzztarget"))]
2481 panic!("Client called ChannelManager::funding_transaction_generated with bogus transaction!");
2483 self.channel_state = ChannelState::ShutdownComplete as u32;
2484 self.channel_update_count += 1;
2485 return Err(HandleError{err: "funding tx had wrong script/value", action: Some(ErrorAction::DisconnectPeer{msg: None})});
2487 self.funding_tx_confirmations = 1;
2488 self.short_channel_id = Some(((height as u64) << (5*8)) |
2489 ((*index_in_block as u64) << (2*8)) |
2490 ((txo_idx as u64) << (0*8)));
2498 /// Called by channelmanager based on chain blocks being disconnected.
2499 /// Returns true if we need to close the channel now due to funding transaction
2500 /// unconfirmation/reorg.
2501 pub fn block_disconnected(&mut self, header: &BlockHeader) -> bool {
2502 if self.funding_tx_confirmations > 0 {
2503 self.funding_tx_confirmations -= 1;
2504 if self.funding_tx_confirmations == UNCONF_THRESHOLD as u64 {
2508 if Some(header.bitcoin_hash()) == self.funding_tx_confirmed_in {
2509 self.funding_tx_confirmations = Channel::derive_minimum_depth(self.channel_value_satoshis*1000, self.value_to_self_msat) as u64 - 1;
2514 // Methods to get unprompted messages to send to the remote end (or where we already returned
2515 // something in the handler for the message that prompted this message):
2517 pub fn get_open_channel(&self, chain_hash: Sha256dHash, fee_estimator: &FeeEstimator) -> msgs::OpenChannel {
2518 if !self.channel_outbound {
2519 panic!("Tried to open a channel for an inbound channel?");
2521 if self.channel_state != ChannelState::OurInitSent as u32 {
2522 panic!("Cannot generate an open_channel after we've moved forward");
2525 if self.cur_local_commitment_transaction_number != INITIAL_COMMITMENT_NUMBER {
2526 panic!("Tried to send an open_channel for a channel that has already advanced");
2529 let local_commitment_secret = self.build_local_commitment_secret(self.cur_local_commitment_transaction_number);
2532 chain_hash: chain_hash,
2533 temporary_channel_id: self.channel_id,
2534 funding_satoshis: self.channel_value_satoshis,
2535 push_msat: self.channel_value_satoshis * 1000 - self.value_to_self_msat,
2536 dust_limit_satoshis: self.our_dust_limit_satoshis,
2537 max_htlc_value_in_flight_msat: Channel::get_our_max_htlc_value_in_flight_msat(self.channel_value_satoshis),
2538 channel_reserve_satoshis: Channel::get_our_channel_reserve_satoshis(self.channel_value_satoshis),
2539 htlc_minimum_msat: self.our_htlc_minimum_msat,
2540 feerate_per_kw: fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Background) as u32,
2541 to_self_delay: BREAKDOWN_TIMEOUT,
2542 max_accepted_htlcs: OUR_MAX_HTLCS,
2543 funding_pubkey: PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.funding_key),
2544 revocation_basepoint: PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.revocation_base_key),
2545 payment_basepoint: PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.payment_base_key),
2546 delayed_payment_basepoint: PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.delayed_payment_base_key),
2547 htlc_basepoint: PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.htlc_base_key),
2548 first_per_commitment_point: PublicKey::from_secret_key(&self.secp_ctx, &local_commitment_secret),
2549 channel_flags: if self.announce_publicly {1} else {0},
2550 shutdown_scriptpubkey: None,
2554 pub fn get_accept_channel(&self) -> msgs::AcceptChannel {
2555 if self.channel_outbound {
2556 panic!("Tried to send accept_channel for an outbound channel?");
2558 if self.channel_state != (ChannelState::OurInitSent as u32) | (ChannelState::TheirInitSent as u32) {
2559 panic!("Tried to send accept_channel after channel had moved forward");
2561 if self.cur_local_commitment_transaction_number != INITIAL_COMMITMENT_NUMBER {
2562 panic!("Tried to send an accept_channel for a channel that has already advanced");
2565 let local_commitment_secret = self.build_local_commitment_secret(self.cur_local_commitment_transaction_number);
2567 msgs::AcceptChannel {
2568 temporary_channel_id: self.channel_id,
2569 dust_limit_satoshis: self.our_dust_limit_satoshis,
2570 max_htlc_value_in_flight_msat: Channel::get_our_max_htlc_value_in_flight_msat(self.channel_value_satoshis),
2571 channel_reserve_satoshis: Channel::get_our_channel_reserve_satoshis(self.channel_value_satoshis),
2572 htlc_minimum_msat: self.our_htlc_minimum_msat,
2573 minimum_depth: Channel::derive_minimum_depth(self.channel_value_satoshis*1000, self.value_to_self_msat),
2574 to_self_delay: BREAKDOWN_TIMEOUT,
2575 max_accepted_htlcs: OUR_MAX_HTLCS,
2576 funding_pubkey: PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.funding_key),
2577 revocation_basepoint: PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.revocation_base_key),
2578 payment_basepoint: PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.payment_base_key),
2579 delayed_payment_basepoint: PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.delayed_payment_base_key),
2580 htlc_basepoint: PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.htlc_base_key),
2581 first_per_commitment_point: PublicKey::from_secret_key(&self.secp_ctx, &local_commitment_secret),
2582 shutdown_scriptpubkey: None,
2586 fn get_outbound_funding_created_signature(&mut self) -> Result<(Signature, Transaction), HandleError> {
2587 let funding_script = self.get_funding_redeemscript();
2589 let remote_keys = self.build_remote_transaction_keys()?;
2590 let remote_initial_commitment_tx = self.build_commitment_transaction(self.cur_remote_commitment_transaction_number, &remote_keys, false, false, self.feerate_per_kw).0;
2591 let remote_sighash = Message::from_slice(&bip143::SighashComponents::new(&remote_initial_commitment_tx).sighash_all(&remote_initial_commitment_tx.input[0], &funding_script, self.channel_value_satoshis)[..]).unwrap();
2593 // We sign the "remote" commitment transaction, allowing them to broadcast the tx if they wish.
2594 Ok((self.secp_ctx.sign(&remote_sighash, &self.local_keys.funding_key), remote_initial_commitment_tx))
2597 /// Updates channel state with knowledge of the funding transaction's txid/index, and generates
2598 /// a funding_created message for the remote peer.
2599 /// Panics if called at some time other than immediately after initial handshake, if called twice,
2600 /// or if called on an inbound channel.
2601 /// Note that channel_id changes during this call!
2602 /// Do NOT broadcast the funding transaction until after a successful funding_signed call!
2603 pub fn get_outbound_funding_created(&mut self, funding_txo: OutPoint) -> Result<(msgs::FundingCreated, ChannelMonitor), HandleError> {
2604 if !self.channel_outbound {
2605 panic!("Tried to create outbound funding_created message on an inbound channel!");
2607 if self.channel_state != (ChannelState::OurInitSent as u32 | ChannelState::TheirInitSent as u32) {
2608 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)");
2610 if self.channel_monitor.get_min_seen_secret() != (1 << 48) ||
2611 self.cur_remote_commitment_transaction_number != INITIAL_COMMITMENT_NUMBER ||
2612 self.cur_local_commitment_transaction_number != INITIAL_COMMITMENT_NUMBER {
2613 panic!("Should not have advanced channel commitment tx numbers prior to funding_created");
2616 let funding_txo_script = self.get_funding_redeemscript().to_v0_p2wsh();
2617 self.channel_monitor.set_funding_info((funding_txo, funding_txo_script));
2619 let (our_signature, commitment_tx) = match self.get_outbound_funding_created_signature() {
2622 log_error!(self, "Got bad signatures: {}!", e.err);
2623 self.channel_monitor.unset_funding_info();
2628 let temporary_channel_id = self.channel_id;
2630 // Now that we're past error-generating stuff, update our local state:
2631 self.channel_monitor.provide_latest_remote_commitment_tx_info(&commitment_tx, Vec::new(), self.cur_remote_commitment_transaction_number);
2632 self.channel_state = ChannelState::FundingCreated as u32;
2633 self.channel_id = funding_txo.to_channel_id();
2634 self.cur_remote_commitment_transaction_number -= 1;
2636 Ok((msgs::FundingCreated {
2637 temporary_channel_id: temporary_channel_id,
2638 funding_txid: funding_txo.txid,
2639 funding_output_index: funding_txo.index,
2640 signature: our_signature
2641 }, self.channel_monitor.clone()))
2644 /// Gets an UnsignedChannelAnnouncement, as well as a signature covering it using our
2645 /// bitcoin_key, if available, for this channel. The channel must be publicly announceable and
2646 /// available for use (have exchanged FundingLocked messages in both directions). Should be used
2647 /// for both loose and in response to an AnnouncementSignatures message from the remote peer.
2648 /// Will only fail if we're not in a state where channel_announcement may be sent (including
2650 /// Note that the "channel must be funded" requirement is stricter than BOLT 7 requires - see
2651 /// https://github.com/lightningnetwork/lightning-rfc/issues/468
2652 pub fn get_channel_announcement(&self, our_node_id: PublicKey, chain_hash: Sha256dHash) -> Result<(msgs::UnsignedChannelAnnouncement, Signature), HandleError> {
2653 if !self.announce_publicly {
2654 return Err(HandleError{err: "Channel is not available for public announcements", action: Some(msgs::ErrorAction::IgnoreError)});
2656 if self.channel_state & (ChannelState::ChannelFunded as u32) == 0 {
2657 return Err(HandleError{err: "Cannot get a ChannelAnnouncement until the channel funding has been locked", action: Some(msgs::ErrorAction::IgnoreError)});
2659 if (self.channel_state & (ChannelState::LocalShutdownSent as u32 | ChannelState::ShutdownComplete as u32)) != 0 {
2660 return Err(HandleError{err: "Cannot get a ChannelAnnouncement once the channel is closing", action: Some(msgs::ErrorAction::IgnoreError)});
2663 let were_node_one = our_node_id.serialize()[..] < self.their_node_id.serialize()[..];
2664 let our_bitcoin_key = PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.funding_key);
2666 let msg = msgs::UnsignedChannelAnnouncement {
2667 features: msgs::GlobalFeatures::new(),
2668 chain_hash: chain_hash,
2669 short_channel_id: self.get_short_channel_id().unwrap(),
2670 node_id_1: if were_node_one { our_node_id } else { self.get_their_node_id() },
2671 node_id_2: if were_node_one { self.get_their_node_id() } else { our_node_id },
2672 bitcoin_key_1: if were_node_one { our_bitcoin_key } else { self.their_funding_pubkey.unwrap() },
2673 bitcoin_key_2: if were_node_one { self.their_funding_pubkey.unwrap() } else { our_bitcoin_key },
2674 excess_data: Vec::new(),
2677 let msghash = Message::from_slice(&Sha256dHash::from_data(&msg.encode()[..])[..]).unwrap();
2678 let sig = self.secp_ctx.sign(&msghash, &self.local_keys.funding_key);
2683 /// May panic if called on a channel that wasn't immediately-previously
2684 /// self.remove_uncommitted_htlcs_and_mark_paused()'d
2685 pub fn get_channel_reestablish(&self) -> msgs::ChannelReestablish {
2686 assert_eq!(self.channel_state & ChannelState::PeerDisconnected as u32, ChannelState::PeerDisconnected as u32);
2687 msgs::ChannelReestablish {
2688 channel_id: self.channel_id(),
2689 next_local_commitment_number: INITIAL_COMMITMENT_NUMBER - self.cur_local_commitment_transaction_number,
2690 next_remote_commitment_number: INITIAL_COMMITMENT_NUMBER - self.cur_remote_commitment_transaction_number,
2691 data_loss_protect: None,
2696 // Send stuff to our remote peers:
2698 /// Adds a pending outbound HTLC to this channel, note that you probably want
2699 /// send_htlc_and_commit instead cause you'll want both messages at once.
2700 /// This returns an option instead of a pure UpdateAddHTLC as we may be in a state where we are
2701 /// waiting on the remote peer to send us a revoke_and_ack during which time we cannot add new
2702 /// HTLCs on the wire or we wouldn't be able to determine what they actually ACK'ed.
2703 /// You MUST call send_commitment prior to any other calls on this Channel
2704 pub fn send_htlc(&mut self, amount_msat: u64, payment_hash: [u8; 32], cltv_expiry: u32, source: HTLCSource, onion_routing_packet: msgs::OnionPacket) -> Result<Option<msgs::UpdateAddHTLC>, HandleError> {
2705 if (self.channel_state & (ChannelState::ChannelFunded as u32 | BOTH_SIDES_SHUTDOWN_MASK)) != (ChannelState::ChannelFunded as u32) {
2706 return Err(HandleError{err: "Cannot send HTLC until channel is fully established and we haven't started shutting down", action: None});
2709 if amount_msat > self.channel_value_satoshis * 1000 {
2710 return Err(HandleError{err: "Cannot send more than the total value of the channel", action: None});
2712 if amount_msat < self.their_htlc_minimum_msat {
2713 return Err(HandleError{err: "Cannot send less than their minimum HTLC value", action: None});
2716 if (self.channel_state & (ChannelState::PeerDisconnected as u32)) == (ChannelState::PeerDisconnected as u32) {
2717 // Note that this should never really happen, if we're !is_live() on receipt of an
2718 // incoming HTLC for relay will result in us rejecting the HTLC and we won't allow
2719 // the user to send directly into a !is_live() channel. However, if we
2720 // disconnected during the time the previous hop was doing the commitment dance we may
2721 // end up getting here after the forwarding delay. In any case, returning an
2722 // IgnoreError will get ChannelManager to do the right thing and fail backwards now.
2723 return Err(HandleError{err: "Cannot send an HTLC while disconnected", action: Some(ErrorAction::IgnoreError)});
2726 let (_, outbound_htlc_count, htlc_outbound_value_msat, htlc_inbound_value_msat) = self.get_pending_htlc_stats(false);
2727 if outbound_htlc_count + 1 > self.their_max_accepted_htlcs as u32 {
2728 return Err(HandleError{err: "Cannot push more than their max accepted HTLCs", action: None});
2730 //TODO: Spec is unclear if this is per-direction or in total (I assume per direction):
2731 // Check their_max_htlc_value_in_flight_msat
2732 if htlc_outbound_value_msat + amount_msat > self.their_max_htlc_value_in_flight_msat {
2733 return Err(HandleError{err: "Cannot send value that would put us over our max HTLC value in flight", action: None});
2735 // Check their_channel_reserve_satoshis:
2736 if htlc_inbound_value_msat + htlc_outbound_value_msat + amount_msat + (self.channel_value_satoshis * 1000 - self.value_to_self_msat) > (self.channel_value_satoshis - self.their_channel_reserve_satoshis) * 1000 {
2737 return Err(HandleError{err: "Cannot send value that would put us over our reserve value", action: None});
2740 //TODO: Check cltv_expiry? Do this in channel manager?
2742 // Now update local state:
2743 if (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32)) == (ChannelState::AwaitingRemoteRevoke as u32) {
2744 //TODO: Check the limits *including* other pending holding cell HTLCs!
2745 self.holding_cell_htlc_updates.push(HTLCUpdateAwaitingACK::AddHTLC {
2746 amount_msat: amount_msat,
2747 payment_hash: payment_hash,
2748 cltv_expiry: cltv_expiry,
2750 onion_routing_packet: onion_routing_packet,
2751 time_created: Instant::now(),
2756 self.pending_outbound_htlcs.push(OutboundHTLCOutput {
2757 htlc_id: self.next_local_htlc_id,
2758 amount_msat: amount_msat,
2759 payment_hash: payment_hash.clone(),
2760 cltv_expiry: cltv_expiry,
2761 state: OutboundHTLCState::LocalAnnounced,
2766 let res = msgs::UpdateAddHTLC {
2767 channel_id: self.channel_id,
2768 htlc_id: self.next_local_htlc_id,
2769 amount_msat: amount_msat,
2770 payment_hash: payment_hash,
2771 cltv_expiry: cltv_expiry,
2772 onion_routing_packet: onion_routing_packet,
2774 self.next_local_htlc_id += 1;
2779 /// Creates a signed commitment transaction to send to the remote peer.
2780 /// Always returns a Channel-failing HandleError::action if an immediately-preceding (read: the
2781 /// last call to this Channel) send_htlc returned Ok(Some(_)) and there is an Err.
2782 /// May panic if called except immediately after a successful, Ok(Some(_))-returning send_htlc.
2783 pub fn send_commitment(&mut self) -> Result<(msgs::CommitmentSigned, ChannelMonitor), HandleError> {
2784 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
2785 panic!("Cannot create commitment tx until channel is fully established");
2787 if (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32)) == (ChannelState::AwaitingRemoteRevoke as u32) {
2788 panic!("Cannot create commitment tx until remote revokes their previous commitment");
2790 if (self.channel_state & (ChannelState::PeerDisconnected as u32)) == (ChannelState::PeerDisconnected as u32) {
2791 panic!("Cannot create commitment tx while disconnected, as send_htlc will have returned an Err so a send_commitment precondition has been violated");
2793 let mut have_updates = self.pending_update_fee.is_some();
2794 for htlc in self.pending_outbound_htlcs.iter() {
2795 if htlc.state == OutboundHTLCState::LocalAnnounced {
2796 have_updates = true;
2798 if have_updates { break; }
2801 panic!("Cannot create commitment tx until we have some updates to send");
2803 self.send_commitment_no_status_check()
2805 /// Only fails in case of bad keys
2806 fn send_commitment_no_status_check(&mut self) -> Result<(msgs::CommitmentSigned, ChannelMonitor), HandleError> {
2807 // We can upgrade the status of some HTLCs that are waiting on a commitment, even if we
2808 // fail to generate this, we still are at least at a position where upgrading their status
2810 for htlc in self.pending_inbound_htlcs.iter_mut() {
2811 if htlc.state == InboundHTLCState::AwaitingRemoteRevokeToAnnounce {
2812 htlc.state = InboundHTLCState::AwaitingAnnouncedRemoteRevoke;
2815 for htlc in self.pending_outbound_htlcs.iter_mut() {
2816 if htlc.state == OutboundHTLCState::AwaitingRemoteRevokeToRemove {
2817 htlc.state = OutboundHTLCState::AwaitingRemovedRemoteRevoke;
2821 match self.send_commitment_no_state_update() {
2822 Ok((res, remote_commitment_tx)) => {
2823 // Update state now that we've passed all the can-fail calls...
2824 self.channel_monitor.provide_latest_remote_commitment_tx_info(&remote_commitment_tx.0, remote_commitment_tx.1, self.cur_remote_commitment_transaction_number);
2825 self.channel_state |= ChannelState::AwaitingRemoteRevoke as u32;
2826 Ok((res, self.channel_monitor.clone()))
2832 /// Only fails in case of bad keys. Used for channel_reestablish commitment_signed generation
2833 /// when we shouldn't change HTLC/channel state.
2834 fn send_commitment_no_state_update(&self) -> Result<(msgs::CommitmentSigned, (Transaction, Vec<HTLCOutputInCommitment>)), HandleError> {
2835 let funding_script = self.get_funding_redeemscript();
2837 let mut feerate_per_kw = self.feerate_per_kw;
2838 if let Some(feerate) = self.pending_update_fee {
2839 if self.channel_outbound {
2840 feerate_per_kw = feerate;
2844 let remote_keys = self.build_remote_transaction_keys()?;
2845 let remote_commitment_tx = self.build_commitment_transaction(self.cur_remote_commitment_transaction_number, &remote_keys, false, true, feerate_per_kw);
2846 let remote_commitment_txid = remote_commitment_tx.0.txid();
2847 let remote_sighash = Message::from_slice(&bip143::SighashComponents::new(&remote_commitment_tx.0).sighash_all(&remote_commitment_tx.0.input[0], &funding_script, self.channel_value_satoshis)[..]).unwrap();
2848 let our_sig = self.secp_ctx.sign(&remote_sighash, &self.local_keys.funding_key);
2850 let mut htlc_sigs = Vec::new();
2852 for ref htlc in remote_commitment_tx.1.iter() {
2853 let htlc_tx = self.build_htlc_transaction(&remote_commitment_txid, htlc, false, &remote_keys, feerate_per_kw);
2854 let htlc_redeemscript = chan_utils::get_htlc_redeemscript(&htlc, &remote_keys);
2855 let htlc_sighash = Message::from_slice(&bip143::SighashComponents::new(&htlc_tx).sighash_all(&htlc_tx.input[0], &htlc_redeemscript, htlc.amount_msat / 1000)[..]).unwrap();
2856 let our_htlc_key = secp_derived_key!(chan_utils::derive_private_key(&self.secp_ctx, &remote_keys.per_commitment_point, &self.local_keys.htlc_base_key), self.channel_id());
2857 htlc_sigs.push(self.secp_ctx.sign(&htlc_sighash, &our_htlc_key));
2860 Ok((msgs::CommitmentSigned {
2861 channel_id: self.channel_id,
2863 htlc_signatures: htlc_sigs,
2864 }, remote_commitment_tx))
2867 /// Adds a pending outbound HTLC to this channel, and creates a signed commitment transaction
2868 /// to send to the remote peer in one go.
2869 /// Shorthand for calling send_htlc() followed by send_commitment(), see docs on those for
2871 pub fn send_htlc_and_commit(&mut self, amount_msat: u64, payment_hash: [u8; 32], cltv_expiry: u32, source: HTLCSource, onion_routing_packet: msgs::OnionPacket) -> Result<Option<(msgs::UpdateAddHTLC, msgs::CommitmentSigned, ChannelMonitor)>, HandleError> {
2872 match self.send_htlc(amount_msat, payment_hash, cltv_expiry, source, onion_routing_packet)? {
2873 Some(update_add_htlc) => {
2874 let (commitment_signed, monitor_update) = self.send_commitment_no_status_check()?;
2875 Ok(Some((update_add_htlc, commitment_signed, monitor_update)))
2881 /// Begins the shutdown process, getting a message for the remote peer and returning all
2882 /// holding cell HTLCs for payment failure.
2883 pub fn get_shutdown(&mut self) -> Result<(msgs::Shutdown, Vec<(HTLCSource, [u8; 32])>), HandleError> {
2884 for htlc in self.pending_outbound_htlcs.iter() {
2885 if htlc.state == OutboundHTLCState::LocalAnnounced {
2886 return Err(HandleError{err: "Cannot begin shutdown with pending HTLCs, call send_commitment first", action: None});
2889 if self.channel_state & BOTH_SIDES_SHUTDOWN_MASK != 0 {
2890 return Err(HandleError{err: "Shutdown already in progress", action: None});
2892 assert_eq!(self.channel_state & ChannelState::ShutdownComplete as u32, 0);
2893 if self.channel_state & (ChannelState::PeerDisconnected as u32) == ChannelState::PeerDisconnected as u32 {
2894 return Err(HandleError{err: "Cannot begin shutdown while peer is disconnected, maybe force-close instead?", action: None});
2897 let our_closing_script = self.get_closing_scriptpubkey();
2899 // From here on out, we may not fail!
2900 if self.channel_state < ChannelState::FundingSent as u32 {
2901 self.channel_state = ChannelState::ShutdownComplete as u32;
2903 self.channel_state |= ChannelState::LocalShutdownSent as u32;
2905 self.channel_update_count += 1;
2907 // We can't send our shutdown until we've committed all of our pending HTLCs, but the
2908 // remote side is unlikely to accept any new HTLCs, so we go ahead and "free" any holding
2909 // cell HTLCs and return them to fail the payment.
2910 let mut dropped_outbound_htlcs = Vec::with_capacity(self.holding_cell_htlc_updates.len());
2911 self.holding_cell_htlc_updates.retain(|htlc_update| {
2913 &HTLCUpdateAwaitingACK::AddHTLC { ref payment_hash, ref source, .. } => {
2914 dropped_outbound_htlcs.push((source.clone(), payment_hash.clone()));
2921 Ok((msgs::Shutdown {
2922 channel_id: self.channel_id,
2923 scriptpubkey: our_closing_script,
2924 }, dropped_outbound_htlcs))
2927 /// Gets the latest commitment transaction and any dependant transactions for relay (forcing
2928 /// shutdown of this channel - no more calls into this Channel may be made afterwards except
2929 /// those explicitly stated to be allowed after shutdown completes, eg some simple getters).
2930 /// Also returns the list of payment_hashes for channels which we can safely fail backwards
2931 /// immediately (others we will have to allow to time out).
2932 pub fn force_shutdown(&mut self) -> (Vec<Transaction>, Vec<(HTLCSource, [u8; 32])>) {
2933 assert!(self.channel_state != ChannelState::ShutdownComplete as u32);
2935 // We go ahead and "free" any holding cell HTLCs or HTLCs we haven't yet committed to and
2936 // return them to fail the payment.
2937 let mut dropped_outbound_htlcs = Vec::with_capacity(self.holding_cell_htlc_updates.len());
2938 for htlc_update in self.holding_cell_htlc_updates.drain(..) {
2940 HTLCUpdateAwaitingACK::AddHTLC { source, payment_hash, .. } => {
2941 dropped_outbound_htlcs.push((source, payment_hash));
2947 for _htlc in self.pending_outbound_htlcs.drain(..) {
2948 //TODO: Do something with the remaining HTLCs
2949 //(we need to have the ChannelManager monitor them so we can claim the inbound HTLCs
2953 self.channel_state = ChannelState::ShutdownComplete as u32;
2954 self.channel_update_count += 1;
2955 let mut res = Vec::new();
2956 mem::swap(&mut res, &mut self.last_local_commitment_txn);
2957 (res, dropped_outbound_htlcs)
2963 use bitcoin::util::hash::Sha256dHash;
2964 use bitcoin::util::bip143;
2965 use bitcoin::network::serialize::serialize;
2966 use bitcoin::blockdata::script::Script;
2967 use bitcoin::blockdata::transaction::Transaction;
2969 use ln::channelmanager::HTLCSource;
2970 use ln::channel::{Channel,ChannelKeys,InboundHTLCOutput,OutboundHTLCOutput,InboundHTLCState,OutboundHTLCState,HTLCOutputInCommitment,TxCreationKeys};
2971 use ln::channel::MAX_FUNDING_SATOSHIS;
2973 use chain::chaininterface::{FeeEstimator,ConfirmationTarget};
2974 use chain::transaction::OutPoint;
2975 use util::test_utils;
2976 use util::logger::Logger;
2977 use secp256k1::{Secp256k1,Message,Signature};
2978 use secp256k1::key::{SecretKey,PublicKey};
2979 use crypto::sha2::Sha256;
2980 use crypto::digest::Digest;
2983 struct TestFeeEstimator {
2986 impl FeeEstimator for TestFeeEstimator {
2987 fn get_est_sat_per_1000_weight(&self, _: ConfirmationTarget) -> u64 {
2993 fn test_max_funding_satoshis() {
2994 assert!(MAX_FUNDING_SATOSHIS <= 21_000_000 * 100_000_000,
2995 "MAX_FUNDING_SATOSHIS is greater than all satoshis on existence");
2999 fn outbound_commitment_test() {
3000 // Test vectors from BOLT 3 Appendix C:
3001 let feeest = TestFeeEstimator{fee_est: 15000};
3002 let logger : Arc<Logger> = Arc::new(test_utils::TestLogger::new());
3003 let secp_ctx = Secp256k1::new();
3005 let chan_keys = ChannelKeys {
3006 funding_key: SecretKey::from_slice(&secp_ctx, &hex::decode("30ff4956bbdd3222d44cc5e8a1261dab1e07957bdac5ae88fe3261ef321f3749").unwrap()[..]).unwrap(),
3007 payment_base_key: SecretKey::from_slice(&secp_ctx, &hex::decode("1111111111111111111111111111111111111111111111111111111111111111").unwrap()[..]).unwrap(),
3008 delayed_payment_base_key: SecretKey::from_slice(&secp_ctx, &hex::decode("3333333333333333333333333333333333333333333333333333333333333333").unwrap()[..]).unwrap(),
3009 htlc_base_key: SecretKey::from_slice(&secp_ctx, &hex::decode("1111111111111111111111111111111111111111111111111111111111111111").unwrap()[..]).unwrap(),
3011 // These aren't set in the test vectors:
3012 revocation_base_key: SecretKey::from_slice(&secp_ctx, &hex::decode("0fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff").unwrap()[..]).unwrap(),
3013 channel_close_key: SecretKey::from_slice(&secp_ctx, &hex::decode("0fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff").unwrap()[..]).unwrap(),
3014 channel_monitor_claim_key: SecretKey::from_slice(&secp_ctx, &hex::decode("0fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff").unwrap()[..]).unwrap(),
3015 commitment_seed: [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],
3017 assert_eq!(PublicKey::from_secret_key(&secp_ctx, &chan_keys.funding_key).serialize()[..],
3018 hex::decode("023da092f6980e58d2c037173180e9a465476026ee50f96695963e8efe436f54eb").unwrap()[..]);
3020 let their_node_id = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&secp_ctx, &[42; 32]).unwrap());
3021 let mut chan = Channel::new_outbound(&feeest, chan_keys, their_node_id, 10000000, 100000, false, 42, Arc::clone(&logger)).unwrap(); // Nothing uses their network key in this test
3022 chan.their_to_self_delay = 144;
3023 chan.our_dust_limit_satoshis = 546;
3025 let funding_info = OutPoint::new(Sha256dHash::from_hex("8984484a580b825b9972d7adb15050b3ab624ccd731946b3eeddb92f4e7ef6be").unwrap(), 0);
3026 chan.channel_monitor.set_funding_info((funding_info, Script::new()));
3028 chan.their_payment_basepoint = Some(PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&secp_ctx, &hex::decode("4444444444444444444444444444444444444444444444444444444444444444").unwrap()[..]).unwrap()));
3029 assert_eq!(chan.their_payment_basepoint.unwrap().serialize()[..],
3030 hex::decode("032c0b7cf95324a07d05398b240174dc0c2be444d96b159aa6c7f7b1e668680991").unwrap()[..]);
3032 chan.their_funding_pubkey = Some(PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&secp_ctx, &hex::decode("1552dfba4f6cf29a62a0af13c8d6981d36d0ef8d61ba10fb0fe90da7634d7e13").unwrap()[..]).unwrap()));
3033 assert_eq!(chan.their_funding_pubkey.unwrap().serialize()[..],
3034 hex::decode("030e9f7b623d2ccc7c9bd44d66d5ce21ce504c0acf6385a132cec6d3c39fa711c1").unwrap()[..]);
3036 chan.their_htlc_basepoint = Some(PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&secp_ctx, &hex::decode("4444444444444444444444444444444444444444444444444444444444444444").unwrap()[..]).unwrap()));
3037 assert_eq!(chan.their_htlc_basepoint.unwrap().serialize()[..],
3038 hex::decode("032c0b7cf95324a07d05398b240174dc0c2be444d96b159aa6c7f7b1e668680991").unwrap()[..]);
3040 chan.their_revocation_basepoint = Some(PublicKey::from_slice(&secp_ctx, &hex::decode("02466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f27").unwrap()[..]).unwrap());
3042 // We can't just use build_local_transaction_keys here as the per_commitment_secret is not
3043 // derived from a commitment_seed, so instead we copy it here and call
3044 // build_commitment_transaction.
3045 let delayed_payment_base = PublicKey::from_secret_key(&secp_ctx, &chan.local_keys.delayed_payment_base_key);
3046 let per_commitment_secret = SecretKey::from_slice(&secp_ctx, &hex::decode("1f1e1d1c1b1a191817161514131211100f0e0d0c0b0a09080706050403020100").unwrap()[..]).unwrap();
3047 let per_commitment_point = PublicKey::from_secret_key(&secp_ctx, &per_commitment_secret);
3048 let htlc_basepoint = PublicKey::from_secret_key(&secp_ctx, &chan.local_keys.htlc_base_key);
3049 let keys = TxCreationKeys::new(&secp_ctx, &per_commitment_point, &delayed_payment_base, &htlc_basepoint, &chan.their_revocation_basepoint.unwrap(), &chan.their_payment_basepoint.unwrap(), &chan.their_htlc_basepoint.unwrap()).unwrap();
3051 let mut unsigned_tx: (Transaction, Vec<HTLCOutputInCommitment>);
3053 macro_rules! test_commitment {
3054 ( $their_sig_hex: expr, $our_sig_hex: expr, $tx_hex: expr) => {
3055 unsigned_tx = chan.build_commitment_transaction(0xffffffffffff - 42, &keys, true, false, chan.feerate_per_kw);
3056 let their_signature = Signature::from_der(&secp_ctx, &hex::decode($their_sig_hex).unwrap()[..]).unwrap();
3057 let sighash = Message::from_slice(&bip143::SighashComponents::new(&unsigned_tx.0).sighash_all(&unsigned_tx.0.input[0], &chan.get_funding_redeemscript(), chan.channel_value_satoshis)[..]).unwrap();
3058 secp_ctx.verify(&sighash, &their_signature, &chan.their_funding_pubkey.unwrap()).unwrap();
3060 chan.sign_commitment_transaction(&mut unsigned_tx.0, &their_signature);
3062 assert_eq!(serialize(&unsigned_tx.0).unwrap()[..],
3063 hex::decode($tx_hex).unwrap()[..]);
3067 macro_rules! test_htlc_output {
3068 ( $htlc_idx: expr, $their_sig_hex: expr, $our_sig_hex: expr, $tx_hex: expr ) => {
3069 let remote_signature = Signature::from_der(&secp_ctx, &hex::decode($their_sig_hex).unwrap()[..]).unwrap();
3071 let ref htlc = unsigned_tx.1[$htlc_idx];
3072 let mut htlc_tx = chan.build_htlc_transaction(&unsigned_tx.0.txid(), &htlc, true, &keys, chan.feerate_per_kw);
3073 let htlc_redeemscript = chan_utils::get_htlc_redeemscript(&htlc, &keys);
3074 let htlc_sighash = Message::from_slice(&bip143::SighashComponents::new(&htlc_tx).sighash_all(&htlc_tx.input[0], &htlc_redeemscript, htlc.amount_msat / 1000)[..]).unwrap();
3075 secp_ctx.verify(&htlc_sighash, &remote_signature, &keys.b_htlc_key).unwrap();
3077 let mut preimage: Option<[u8; 32]> = None;
3080 let mut sha = Sha256::new();
3081 sha.input(&[i; 32]);
3083 let mut out = [0; 32];
3084 sha.result(&mut out);
3086 if out == htlc.payment_hash {
3087 preimage = Some([i; 32]);
3091 assert!(preimage.is_some());
3094 chan.sign_htlc_transaction(&mut htlc_tx, &remote_signature, &preimage, &htlc, &keys).unwrap();
3095 assert_eq!(serialize(&htlc_tx).unwrap()[..],
3096 hex::decode($tx_hex).unwrap()[..]);
3101 // simple commitment tx with no HTLCs
3102 chan.value_to_self_msat = 7000000000;
3104 test_commitment!("3045022100f51d2e566a70ba740fc5d8c0f07b9b93d2ed741c3c0860c613173de7d39e7968022041376d520e9c0e1ad52248ddf4b22e12be8763007df977253ef45a4ca3bdb7c0",
3105 "3044022051b75c73198c6deee1a875871c3961832909acd297c6b908d59e3319e5185a46022055c419379c5051a78d00dbbce11b5b664a0c22815fbcc6fcef6b1937c3836939",
3106 "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");
3109 chan.pending_inbound_htlcs.push({
3110 let mut out = InboundHTLCOutput{
3112 amount_msat: 1000000,
3114 payment_hash: [0; 32],
3115 state: InboundHTLCState::Committed,
3116 local_removed_fulfilled: false,
3117 pending_forward_state: None,
3119 let mut sha = Sha256::new();
3120 sha.input(&hex::decode("0000000000000000000000000000000000000000000000000000000000000000").unwrap());
3121 sha.result(&mut out.payment_hash);
3124 chan.pending_inbound_htlcs.push({
3125 let mut out = InboundHTLCOutput{
3127 amount_msat: 2000000,
3129 payment_hash: [0; 32],
3130 state: InboundHTLCState::Committed,
3131 local_removed_fulfilled: false,
3132 pending_forward_state: None,
3134 let mut sha = Sha256::new();
3135 sha.input(&hex::decode("0101010101010101010101010101010101010101010101010101010101010101").unwrap());
3136 sha.result(&mut out.payment_hash);
3139 chan.pending_outbound_htlcs.push({
3140 let mut out = OutboundHTLCOutput{
3142 amount_msat: 2000000,
3144 payment_hash: [0; 32],
3145 state: OutboundHTLCState::Committed,
3146 source: HTLCSource::dummy(),
3149 let mut sha = Sha256::new();
3150 sha.input(&hex::decode("0202020202020202020202020202020202020202020202020202020202020202").unwrap());
3151 sha.result(&mut out.payment_hash);
3154 chan.pending_outbound_htlcs.push({
3155 let mut out = OutboundHTLCOutput{
3157 amount_msat: 3000000,
3159 payment_hash: [0; 32],
3160 state: OutboundHTLCState::Committed,
3161 source: HTLCSource::dummy(),
3164 let mut sha = Sha256::new();
3165 sha.input(&hex::decode("0303030303030303030303030303030303030303030303030303030303030303").unwrap());
3166 sha.result(&mut out.payment_hash);
3169 chan.pending_inbound_htlcs.push({
3170 let mut out = InboundHTLCOutput{
3172 amount_msat: 4000000,
3174 payment_hash: [0; 32],
3175 state: InboundHTLCState::Committed,
3176 local_removed_fulfilled: false,
3177 pending_forward_state: None,
3179 let mut sha = Sha256::new();
3180 sha.input(&hex::decode("0404040404040404040404040404040404040404040404040404040404040404").unwrap());
3181 sha.result(&mut out.payment_hash);
3186 // commitment tx with all five HTLCs untrimmed (minimum feerate)
3187 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
3188 chan.feerate_per_kw = 0;
3190 test_commitment!("304402204fd4928835db1ccdfc40f5c78ce9bd65249b16348df81f0c44328dcdefc97d630220194d3869c38bc732dd87d13d2958015e2fc16829e74cd4377f84d215c0b70606",
3191 "30440220275b0c325a5e9355650dc30c0eccfbc7efb23987c24b556b9dfdd40effca18d202206caceb2c067836c51f296740c7ae807ffcbfbf1dd3a0d56b6de9a5b247985f06",
3192 "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");
3194 assert_eq!(unsigned_tx.1.len(), 5);
3196 test_htlc_output!(0,
3197 "304402206a6e59f18764a5bf8d4fa45eebc591566689441229c918b480fb2af8cc6a4aeb02205248f273be447684b33e3c8d1d85a8e0ca9fa0bae9ae33f0527ada9c162919a6",
3198 "304402207cb324fa0de88f452ffa9389678127ebcf4cabe1dd848b8e076c1a1962bf34720220116ed922b12311bd602d67e60d2529917f21c5b82f25ff6506c0f87886b4dfd5",
3199 "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");
3201 test_htlc_output!(1,
3202 "3045022100d5275b3619953cb0c3b5aa577f04bc512380e60fa551762ce3d7a1bb7401cff9022037237ab0dac3fe100cde094e82e2bed9ba0ed1bb40154b48e56aa70f259e608b",
3203 "3045022100c89172099507ff50f4c925e6c5150e871fb6e83dd73ff9fbb72f6ce829a9633f02203a63821d9162e99f9be712a68f9e589483994feae2661e4546cd5b6cec007be5",
3204 "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");
3206 test_htlc_output!(2,
3207 "304402201b63ec807771baf4fdff523c644080de17f1da478989308ad13a58b51db91d360220568939d38c9ce295adba15665fa68f51d967e8ed14a007b751540a80b325f202",
3208 "3045022100def389deab09cee69eaa1ec14d9428770e45bcbe9feb46468ecf481371165c2f022015d2e3c46600b2ebba8dcc899768874cc6851fd1ecb3fffd15db1cc3de7e10da",
3209 "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");
3211 test_htlc_output!(3,
3212 "3045022100daee1808f9861b6c3ecd14f7b707eca02dd6bdfc714ba2f33bc8cdba507bb182022026654bf8863af77d74f51f4e0b62d461a019561bb12acb120d3f7195d148a554",
3213 "30440220643aacb19bbb72bd2b635bc3f7375481f5981bace78cdd8319b2988ffcc6704202203d27784ec8ad51ed3bd517a05525a5139bb0b755dd719e0054332d186ac08727",
3214 "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");
3216 test_htlc_output!(4,
3217 "304402207e0410e45454b0978a623f36a10626ef17b27d9ad44e2760f98cfa3efb37924f0220220bd8acd43ecaa916a80bd4f919c495a2c58982ce7c8625153f8596692a801d",
3218 "30440220549e80b4496803cbc4a1d09d46df50109f546d43fbbf86cd90b174b1484acd5402205f12a4f995cb9bded597eabfee195a285986aa6d93ae5bb72507ebc6a4e2349e",
3219 "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");
3223 // commitment tx with seven outputs untrimmed (maximum feerate)
3224 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
3225 chan.feerate_per_kw = 647;
3227 test_commitment!("3045022100a5c01383d3ec646d97e40f44318d49def817fcd61a0ef18008a665b3e151785502203e648efddd5838981ef55ec954be69c4a652d021e6081a100d034de366815e9b",
3228 "304502210094bfd8f5572ac0157ec76a9551b6c5216a4538c07cd13a51af4a54cb26fa14320220768efce8ce6f4a5efac875142ff19237c011343670adf9c7ac69704a120d1163",
3229 "02000000000101bef67e4e2fb9ddeeb3461973cd4c62abb35050b1add772995b820b584a488489000000000038b02b8007e80300000000000022002052bfef0479d7b293c27e0f1eb294bea154c63a3294ef092c19af51409bce0e2ad007000000000000220020403d394747cae42e98ff01734ad5c08f82ba123d3d9a620abda88989651e2ab5d007000000000000220020748eba944fedc8827f6b06bc44678f93c0f9e6078b35c6331ed31e75f8ce0c2db80b000000000000220020c20b5d1f8584fd90443e7b7b720136174fa4b9333c261d04dbbd012635c0f419a00f0000000000002200208c48d15160397c9731df9bc3b236656efb6665fbfe92b4a6878e88a499f741c4c0c62d0000000000160014ccf1af2f2aabee14bb40fa3851ab2301de843110e09c6a00000000002200204adb4e2f00643db396dd120d4e7dc17625f5f2c11a40d857accc862d6b7dd80e040048304502210094bfd8f5572ac0157ec76a9551b6c5216a4538c07cd13a51af4a54cb26fa14320220768efce8ce6f4a5efac875142ff19237c011343670adf9c7ac69704a120d116301483045022100a5c01383d3ec646d97e40f44318d49def817fcd61a0ef18008a665b3e151785502203e648efddd5838981ef55ec954be69c4a652d021e6081a100d034de366815e9b01475221023da092f6980e58d2c037173180e9a465476026ee50f96695963e8efe436f54eb21030e9f7b623d2ccc7c9bd44d66d5ce21ce504c0acf6385a132cec6d3c39fa711c152ae3e195220");
3231 assert_eq!(unsigned_tx.1.len(), 5);
3233 test_htlc_output!(0,
3234 "30440220385a5afe75632f50128cbb029ee95c80156b5b4744beddc729ad339c9ca432c802202ba5f48550cad3379ac75b9b4fedb86a35baa6947f16ba5037fb8b11ab343740",
3235 "304402205999590b8a79fa346e003a68fd40366397119b2b0cdf37b149968d6bc6fbcc4702202b1e1fb5ab7864931caed4e732c359e0fe3d86a548b557be2246efb1708d579a",
3236 "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");
3238 test_htlc_output!(1,
3239 "304402207ceb6678d4db33d2401fdc409959e57c16a6cb97a30261d9c61f29b8c58d34b90220084b4a17b4ca0e86f2d798b3698ca52de5621f2ce86f80bed79afa66874511b0",
3240 "304402207ff03eb0127fc7c6cae49cc29e2a586b98d1e8969cf4a17dfa50b9c2647720b902205e2ecfda2252956c0ca32f175080e75e4e390e433feb1f8ce9f2ba55648a1dac",
3241 "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");
3243 test_htlc_output!(2,
3244 "304402206a401b29a0dff0d18ec903502c13d83e7ec019450113f4a7655a4ce40d1f65ba0220217723a084e727b6ca0cc8b6c69c014a7e4a01fcdcba3e3993f462a3c574d833",
3245 "3045022100d50d067ca625d54e62df533a8f9291736678d0b86c28a61bb2a80cf42e702d6e02202373dde7e00218eacdafb9415fe0e1071beec1857d1af3c6a201a44cbc47c877",
3246 "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");
3248 test_htlc_output!(3,
3249 "30450221009b1c987ba599ee3bde1dbca776b85481d70a78b681a8d84206723e2795c7cac002207aac84ad910f8598c4d1c0ea2e3399cf6627a4e3e90131315bc9f038451ce39d",
3250 "3045022100db9dc65291077a52728c622987e9895b7241d4394d6dcb916d7600a3e8728c22022036ee3ee717ba0bb5c45ee84bc7bbf85c0f90f26ae4e4a25a6b4241afa8a3f1cb",
3251 "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");
3253 test_htlc_output!(4,
3254 "3045022100cc28030b59f0914f45b84caa983b6f8effa900c952310708c2b5b00781117022022027ba2ccdf94d03c6d48b327f183f6e28c8a214d089b9227f94ac4f85315274f0",
3255 "304402202d1a3c0d31200265d2a2def2753ead4959ae20b4083e19553acfffa5dfab60bf022020ede134149504e15b88ab261a066de49848411e15e70f9e6a5462aec2949f8f",
3256 "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");
3260 // commitment tx with six outputs untrimmed (minimum feerate)
3261 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
3262 chan.feerate_per_kw = 648;
3264 test_commitment!("3044022072714e2fbb93cdd1c42eb0828b4f2eff143f717d8f26e79d6ada4f0dcb681bbe02200911be4e5161dd6ebe59ff1c58e1997c4aea804f81db6b698821db6093d7b057",
3265 "3045022100a2270d5950c89ae0841233f6efea9c951898b301b2e89e0adbd2c687b9f32efa02207943d90f95b9610458e7c65a576e149750ff3accaacad004cd85e70b235e27de",
3266 "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");
3268 assert_eq!(unsigned_tx.1.len(), 4);
3270 test_htlc_output!(0,
3271 "3044022062ef2e77591409d60d7817d9bb1e71d3c4a2931d1a6c7c8307422c84f001a251022022dad9726b0ae3fe92bda745a06f2c00f92342a186d84518588cf65f4dfaada8",
3272 "3045022100a4c574f00411dd2f978ca5cdc1b848c311cd7849c087ad2f21a5bce5e8cc5ae90220090ae39a9bce2fb8bc879d7e9f9022df249f41e25e51f1a9bf6447a9eeffc098",
3273 "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");
3275 test_htlc_output!(1,
3276 "3045022100e968cbbb5f402ed389fdc7f6cd2a80ed650bb42c79aeb2a5678444af94f6c78502204b47a1cb24ab5b0b6fe69fe9cfc7dba07b9dd0d8b95f372c1d9435146a88f8d4",
3277 "304402207679cf19790bea76a733d2fa0672bd43ab455687a068f815a3d237581f57139a0220683a1a799e102071c206b207735ca80f627ab83d6616b4bcd017c5d79ef3e7d0",
3278 "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");
3280 test_htlc_output!(2,
3281 "3045022100aa91932e305292cf9969cc23502bbf6cef83a5df39c95ad04a707c4f4fed5c7702207099fc0f3a9bfe1e7683c0e9aa5e76c5432eb20693bf4cb182f04d383dc9c8c2",
3282 "304402200df76fea718745f3c529bac7fd37923e7309ce38b25c0781e4cf514dd9ef8dc802204172295739dbae9fe0474dcee3608e3433b4b2af3a2e6787108b02f894dcdda3",
3283 "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");
3285 test_htlc_output!(3,
3286 "3044022035cac88040a5bba420b1c4257235d5015309113460bc33f2853cd81ca36e632402202fc94fd3e81e9d34a9d01782a0284f3044370d03d60f3fc041e2da088d2de58f",
3287 "304402200daf2eb7afd355b4caf6fb08387b5f031940ea29d1a9f35071288a839c9039e4022067201b562456e7948616c13acb876b386b511599b58ac1d94d127f91c50463a6",
3288 "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");
3292 // commitment tx with six outputs untrimmed (maximum feerate)
3293 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
3294 chan.feerate_per_kw = 2069;
3296 test_commitment!("3044022001d55e488b8b035b2dd29d50b65b530923a416d47f377284145bc8767b1b6a75022019bb53ddfe1cefaf156f924777eaaf8fdca1810695a7d0a247ad2afba8232eb4",
3297 "304402203ca8f31c6a47519f83255dc69f1894d9a6d7476a19f498d31eaf0cd3a85eeb63022026fd92dc752b33905c4c838c528b692a8ad4ced959990b5d5ee2ff940fa90eea",
3298 "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");
3300 assert_eq!(unsigned_tx.1.len(), 4);
3302 test_htlc_output!(0,
3303 "3045022100d1cf354de41c1369336cf85b225ed033f1f8982a01be503668df756a7e668b66022001254144fb4d0eecc61908fccc3388891ba17c5d7a1a8c62bdd307e5a513f992",
3304 "3044022056eb1af429660e45a1b0b66568cb8c4a3aa7e4c9c292d5d6c47f86ebf2c8838f022065c3ac4ebe980ca7a41148569be4ad8751b0a724a41405697ec55035dae66402",
3305 "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");
3307 test_htlc_output!(1,
3308 "3045022100d065569dcb94f090345402736385efeb8ea265131804beac06dd84d15dd2d6880220664feb0b4b2eb985fadb6ec7dc58c9334ea88ce599a9be760554a2d4b3b5d9f4",
3309 "3045022100914bb232cd4b2690ee3d6cb8c3713c4ac9c4fb925323068d8b07f67c8541f8d9022057152f5f1615b793d2d45aac7518989ae4fe970f28b9b5c77504799d25433f7f",
3310 "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");
3312 test_htlc_output!(2,
3313 "3045022100d4e69d363de993684eae7b37853c40722a4c1b4a7b588ad7b5d8a9b5006137a102207a069c628170ee34be5612747051bdcc087466dbaa68d5756ea81c10155aef18",
3314 "304402200e362443f7af830b419771e8e1614fc391db3a4eb799989abfc5ab26d6fcd032022039ab0cad1c14dfbe9446bf847965e56fe016e0cbcf719fd18c1bfbf53ecbd9f9",
3315 "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");
3317 test_htlc_output!(3,
3318 "30450221008ec888e36e4a4b3dc2ed6b823319855b2ae03006ca6ae0d9aa7e24bfc1d6f07102203b0f78885472a67ff4fe5916c0bb669487d659527509516fc3a08e87a2cc0a7c",
3319 "304402202c3e14282b84b02705dfd00a6da396c9fe8a8bcb1d3fdb4b20a4feba09440e8b02202b058b39aa9b0c865b22095edcd9ff1f71bbfe20aa4993755e54d042755ed0d5",
3320 "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");
3324 // commitment tx with five outputs untrimmed (minimum feerate)
3325 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
3326 chan.feerate_per_kw = 2070;
3328 test_commitment!("3045022100f2377f7a67b7fc7f4e2c0c9e3a7de935c32417f5668eda31ea1db401b7dc53030220415fdbc8e91d0f735e70c21952342742e25249b0d062d43efbfc564499f37526",
3329 "30440220443cb07f650aebbba14b8bc8d81e096712590f524c5991ac0ed3bbc8fd3bd0c7022028a635f548e3ca64b19b69b1ea00f05b22752f91daf0b6dab78e62ba52eb7fd0",
3330 "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");
3332 assert_eq!(unsigned_tx.1.len(), 3);
3334 test_htlc_output!(0,
3335 "3045022100eed143b1ee4bed5dc3cde40afa5db3e7354cbf9c44054b5f713f729356f08cf7022077161d171c2bbd9badf3c9934de65a4918de03bbac1450f715275f75b103f891",
3336 "3045022100a0d043ed533e7fb1911e0553d31a8e2f3e6de19dbc035257f29d747c5e02f1f5022030cd38d8e84282175d49c1ebe0470db3ebd59768cf40780a784e248a43904fb8",
3337 "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");
3339 test_htlc_output!(1,
3340 "3044022071e9357619fd8d29a411dc053b326a5224c5d11268070e88ecb981b174747c7a02202b763ae29a9d0732fa8836dd8597439460b50472183f420021b768981b4f7cf6",
3341 "3045022100adb1d679f65f96178b59f23ed37d3b70443118f345224a07ecb043eee2acc157022034d24524fe857144a3bcfff3065a9994d0a6ec5f11c681e49431d573e242612d",
3342 "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");
3344 test_htlc_output!(2,
3345 "3045022100c9458a4d2cbb741705577deb0a890e5cb90ee141be0400d3162e533727c9cb2102206edcf765c5dc5e5f9b976ea8149bf8607b5a0efb30691138e1231302b640d2a4",
3346 "304402200831422aa4e1ee6d55e0b894201770a8f8817a189356f2d70be76633ffa6a6f602200dd1b84a4855dc6727dd46c98daae43dfc70889d1ba7ef0087529a57c06e5e04",
3347 "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");
3351 // commitment tx with five outputs untrimmed (maximum feerate)
3352 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
3353 chan.feerate_per_kw = 2194;
3355 test_commitment!("3045022100d33c4e541aa1d255d41ea9a3b443b3b822ad8f7f86862638aac1f69f8f760577022007e2a18e6931ce3d3a804b1c78eda1de17dbe1fb7a95488c9a4ec86203953348",
3356 "304402203b1b010c109c2ecbe7feb2d259b9c4126bd5dc99ee693c422ec0a5781fe161ba0220571fe4e2c649dea9c7aaf7e49b382962f6a3494963c97d80fef9a430ca3f7061",
3357 "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");
3359 assert_eq!(unsigned_tx.1.len(), 3);
3361 test_htlc_output!(0,
3362 "30450221009ed2f0a67f99e29c3c8cf45c08207b765980697781bb727fe0b1416de0e7622902206052684229bc171419ed290f4b615c943f819c0262414e43c5b91dcf72ddcf44",
3363 "3044022004ad5f04ae69c71b3b141d4db9d0d4c38d84009fb3cfeeae6efdad414487a9a0022042d3fe1388c1ff517d1da7fb4025663d372c14728ed52dc88608363450ff6a2f",
3364 "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");
3366 test_htlc_output!(1,
3367 "30440220155d3b90c67c33a8321996a9be5b82431b0c126613be751d400669da9d5c696702204318448bcd48824439d2c6a70be6e5747446be47ff45977cf41672bdc9b6b12d",
3368 "304402201707050c870c1f77cc3ed58d6d71bf281de239e9eabd8ef0955bad0d7fe38dcc02204d36d80d0019b3a71e646a08fa4a5607761d341ae8be371946ebe437c289c915",
3369 "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");
3371 test_htlc_output!(2,
3372 "3045022100a12a9a473ece548584aabdd051779025a5ed4077c4b7aa376ec7a0b1645e5a48022039490b333f53b5b3e2ddde1d809e492cba2b3e5fc3a436cd3ffb4cd3d500fa5a",
3373 "3045022100ff200bc934ab26ce9a559e998ceb0aee53bc40368e114ab9d3054d9960546e2802202496856ca163ac12c143110b6b3ac9d598df7254f2e17b3b94c3ab5301f4c3b0",
3374 "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");
3378 // commitment tx with four outputs untrimmed (minimum feerate)
3379 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
3380 chan.feerate_per_kw = 2195;
3382 test_commitment!("304402205e2f76d4657fb732c0dfc820a18a7301e368f5799e06b7828007633741bda6df0220458009ae59d0c6246065c419359e05eb2a4b4ef4a1b310cc912db44eb7924298",
3383 "304402203b12d44254244b8ff3bb4129b0920fd45120ab42f553d9976394b099d500c99e02205e95bb7a3164852ef0c48f9e0eaf145218f8e2c41251b231f03cbdc4f29a5429",
3384 "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");
3386 assert_eq!(unsigned_tx.1.len(), 2);
3388 test_htlc_output!(0,
3389 "3045022100a8a78fa1016a5c5c3704f2e8908715a3cef66723fb95f3132ec4d2d05cd84fb4022025ac49287b0861ec21932405f5600cbce94313dbde0e6c5d5af1b3366d8afbfc",
3390 "3045022100be6ae1977fd7b630a53623f3f25c542317ccfc2b971782802a4f1ef538eb22b402207edc4d0408f8f38fd3c7365d1cfc26511b7cd2d4fecd8b005fba3cd5bc704390",
3391 "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");
3393 test_htlc_output!(1,
3394 "3045022100e769cb156aa2f7515d126cef7a69968629620ce82afcaa9e210969de6850df4602200b16b3f3486a229a48aadde520dbee31ae340dbadaffae74fbb56681fef27b92",
3395 "30440220665b9cb4a978c09d1ca8977a534999bc8a49da624d0c5439451dd69cde1a003d022070eae0620f01f3c1bd029cc1488da13fb40fdab76f396ccd335479a11c5276d8",
3396 "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");
3400 // commitment tx with four outputs untrimmed (maximum feerate)
3401 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
3402 chan.feerate_per_kw = 3702;
3404 test_commitment!("3045022100c1a3b0b60ca092ed5080121f26a74a20cec6bdee3f8e47bae973fcdceb3eda5502207d467a9873c939bf3aa758014ae67295fedbca52412633f7e5b2670fc7c381c1",
3405 "304402200e930a43c7951162dc15a2b7344f48091c74c70f7024e7116e900d8bcfba861c022066fa6cbda3929e21daa2e7e16a4b948db7e8919ef978402360d1095ffdaff7b0",
3406 "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");
3408 assert_eq!(unsigned_tx.1.len(), 2);
3410 test_htlc_output!(0,
3411 "3045022100dfb73b4fe961b31a859b2bb1f4f15cabab9265016dd0272323dc6a9e85885c54022059a7b87c02861ee70662907f25ce11597d7b68d3399443a831ae40e777b76bdb",
3412 "304402202765b9c9ece4f127fa5407faf66da4c5ce2719cdbe47cd3175fc7d48b482e43d02205605125925e07bad1e41c618a4b434d72c88a164981c4b8af5eaf4ee9142ec3a",
3413 "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");
3415 test_htlc_output!(1,
3416 "3045022100ea9dc2a7c3c3640334dab733bb4e036e32a3106dc707b24227874fa4f7da746802204d672f7ac0fe765931a8df10b81e53a3242dd32bd9dc9331eb4a596da87954e9",
3417 "30440220048a41c660c4841693de037d00a407810389f4574b3286afb7bc392a438fa3f802200401d71fa87c64fe621b49ac07e3bf85157ac680acb977124da28652cc7f1a5c",
3418 "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");
3422 // commitment tx with three outputs untrimmed (minimum feerate)
3423 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
3424 chan.feerate_per_kw = 3703;
3426 test_commitment!("30450221008b7c191dd46893b67b628e618d2dc8e81169d38bade310181ab77d7c94c6675e02203b4dd131fd7c9deb299560983dcdc485545c98f989f7ae8180c28289f9e6bdb0",
3427 "3044022047305531dd44391dce03ae20f8735005c615eb077a974edb0059ea1a311857d602202e0ed6972fbdd1e8cb542b06e0929bc41b2ddf236e04cb75edd56151f4197506",
3428 "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");
3430 assert_eq!(unsigned_tx.1.len(), 1);
3432 test_htlc_output!(0,
3433 "3044022044f65cf833afdcb9d18795ca93f7230005777662539815b8a601eeb3e57129a902206a4bf3e53392affbba52640627defa8dc8af61c958c9e827b2798ab45828abdd",
3434 "3045022100b94d931a811b32eeb885c28ddcf999ae1981893b21dd1329929543fe87ce793002206370107fdd151c5f2384f9ceb71b3107c69c74c8ed5a28a94a4ab2d27d3b0724",
3435 "020000000001011c076aa7fb3d7460d10df69432c904227ea84bbf3134d4ceee5fb0f135ef206d0000000000000000000175050000000000002200204adb4e2f00643db396dd120d4e7dc17625f5f2c11a40d857accc862d6b7dd80e0500473044022044f65cf833afdcb9d18795ca93f7230005777662539815b8a601eeb3e57129a902206a4bf3e53392affbba52640627defa8dc8af61c958c9e827b2798ab45828abdd01483045022100b94d931a811b32eeb885c28ddcf999ae1981893b21dd1329929543fe87ce793002206370107fdd151c5f2384f9ceb71b3107c69c74c8ed5a28a94a4ab2d27d3b0724012004040404040404040404040404040404040404040404040404040404040404048a76a91414011f7254d96b819c76986c277d115efce6f7b58763ac67210394854aa6eab5b2a8122cc726e9dded053a2184d88256816826d6231c068d4a5b7c8201208763a91418bc1a114ccf9c052d3d23e28d3b0a9d1227434288527c21030d417a46946384f88d5f3337267c5e579765875dc4daca813e21734b140639e752ae677502f801b175ac686800000000");
3439 // commitment tx with three outputs untrimmed (maximum feerate)
3440 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
3441 chan.feerate_per_kw = 4914;
3443 test_commitment!("304402206d6cb93969d39177a09d5d45b583f34966195b77c7e585cf47ac5cce0c90cefb022031d71ae4e33a4e80df7f981d696fbdee517337806a3c7138b7491e2cbb077a0e",
3444 "304402206a2679efa3c7aaffd2a447fd0df7aba8792858b589750f6a1203f9259173198a022008d52a0e77a99ab533c36206cb15ad7aeb2aa72b93d4b571e728cb5ec2f6fe26",
3445 "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");
3447 assert_eq!(unsigned_tx.1.len(), 1);
3449 test_htlc_output!(0,
3450 "3045022100fcb38506bfa11c02874092a843d0cc0a8613c23b639832564a5f69020cb0f6ba02206508b9e91eaa001425c190c68ee5f887e1ad5b1b314002e74db9dbd9e42dbecf",
3451 "304502210086e76b460ddd3cea10525fba298405d3fe11383e56966a5091811368362f689a02200f72ee75657915e0ede89c28709acd113ede9e1b7be520e3bc5cda425ecd6e68",
3452 "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");
3456 // commitment tx with two outputs untrimmed (minimum feerate)
3457 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
3458 chan.feerate_per_kw = 4915;
3460 test_commitment!("304402200769ba89c7330dfa4feba447b6e322305f12ac7dac70ec6ba997ed7c1b598d0802204fe8d337e7fee781f9b7b1a06e580b22f4f79d740059560191d7db53f8765552",
3461 "3045022100a012691ba6cea2f73fa8bac37750477e66363c6d28813b0bb6da77c8eb3fb0270220365e99c51304b0b1a6ab9ea1c8500db186693e39ec1ad5743ee231b0138384b9",
3462 "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");
3464 assert_eq!(unsigned_tx.1.len(), 0);
3468 // commitment tx with two outputs untrimmed (maximum feerate)
3469 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
3470 chan.feerate_per_kw = 9651180;
3472 test_commitment!("3044022037f83ff00c8e5fb18ae1f918ffc24e54581775a20ff1ae719297ef066c71caa9022039c529cccd89ff6c5ed1db799614533844bd6d101da503761c45c713996e3bbd",
3473 "30440220514f977bf7edc442de8ce43ace9686e5ebdc0f893033f13e40fb46c8b8c6e1f90220188006227d175f5c35da0b092c57bea82537aed89f7778204dc5bacf4f29f2b9",
3474 "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");
3476 assert_eq!(unsigned_tx.1.len(), 0);
3480 // commitment tx with one output untrimmed (minimum feerate)
3481 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
3482 chan.feerate_per_kw = 9651181;
3484 test_commitment!("3044022064901950be922e62cbe3f2ab93de2b99f37cff9fc473e73e394b27f88ef0731d02206d1dfa227527b4df44a07599289e207d6fd9cca60c0365682dcd3deaf739567e",
3485 "3044022031a82b51bd014915fe68928d1abf4b9885353fb896cac10c3fdd88d7f9c7f2e00220716bda819641d2c63e65d3549b6120112e1aeaf1742eed94a471488e79e206b1",
3486 "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");
3488 assert_eq!(unsigned_tx.1.len(), 0);
3492 // commitment tx with fee greater than funder amount
3493 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
3494 chan.feerate_per_kw = 9651936;
3496 test_commitment!("3044022064901950be922e62cbe3f2ab93de2b99f37cff9fc473e73e394b27f88ef0731d02206d1dfa227527b4df44a07599289e207d6fd9cca60c0365682dcd3deaf739567e",
3497 "3044022031a82b51bd014915fe68928d1abf4b9885353fb896cac10c3fdd88d7f9c7f2e00220716bda819641d2c63e65d3549b6120112e1aeaf1742eed94a471488e79e206b1",
3498 "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");
3500 assert_eq!(unsigned_tx.1.len(), 0);
3505 fn test_per_commitment_secret_gen() {
3506 // Test vectors from BOLT 3 Appendix D:
3508 let mut seed = [0; 32];
3509 seed[0..32].clone_from_slice(&hex::decode("0000000000000000000000000000000000000000000000000000000000000000").unwrap());
3510 assert_eq!(chan_utils::build_commitment_secret(seed, 281474976710655),
3511 hex::decode("02a40c85b6f28da08dfdbe0926c53fab2de6d28c10301f8f7c4073d5e42e3148").unwrap()[..]);
3513 seed[0..32].clone_from_slice(&hex::decode("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF").unwrap());
3514 assert_eq!(chan_utils::build_commitment_secret(seed, 281474976710655),
3515 hex::decode("7cc854b54e3e0dcdb010d7a3fee464a9687be6e8db3be6854c475621e007a5dc").unwrap()[..]);
3517 assert_eq!(chan_utils::build_commitment_secret(seed, 0xaaaaaaaaaaa),
3518 hex::decode("56f4008fb007ca9acf0e15b054d5c9fd12ee06cea347914ddbaed70d1c13a528").unwrap()[..]);
3520 assert_eq!(chan_utils::build_commitment_secret(seed, 0x555555555555),
3521 hex::decode("9015daaeb06dba4ccc05b91b2f73bd54405f2be9f217fbacd3c5ac2e62327d31").unwrap()[..]);
3523 seed[0..32].clone_from_slice(&hex::decode("0101010101010101010101010101010101010101010101010101010101010101").unwrap());
3524 assert_eq!(chan_utils::build_commitment_secret(seed, 1),
3525 hex::decode("915c75942a26bb3a433a8ce2cb0427c29ec6c1775cfc78328b57f6ba7bfeaa9c").unwrap()[..]);
3529 fn test_key_derivation() {
3530 // Test vectors from BOLT 3 Appendix E:
3531 let secp_ctx = Secp256k1::new();
3533 let base_secret = SecretKey::from_slice(&secp_ctx, &hex::decode("000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f").unwrap()[..]).unwrap();
3534 let per_commitment_secret = SecretKey::from_slice(&secp_ctx, &hex::decode("1f1e1d1c1b1a191817161514131211100f0e0d0c0b0a09080706050403020100").unwrap()[..]).unwrap();
3536 let base_point = PublicKey::from_secret_key(&secp_ctx, &base_secret);
3537 assert_eq!(base_point.serialize()[..], hex::decode("036d6caac248af96f6afa7f904f550253a0f3ef3f5aa2fe6838a95b216691468e2").unwrap()[..]);
3539 let per_commitment_point = PublicKey::from_secret_key(&secp_ctx, &per_commitment_secret);
3540 assert_eq!(per_commitment_point.serialize()[..], hex::decode("025f7117a78150fe2ef97db7cfc83bd57b2e2c0d0dd25eaf467a4a1c2a45ce1486").unwrap()[..]);
3542 assert_eq!(chan_utils::derive_public_key(&secp_ctx, &per_commitment_point, &base_point).unwrap().serialize()[..],
3543 hex::decode("0235f2dbfaa89b57ec7b055afe29849ef7ddfeb1cefdb9ebdc43f5494984db29e5").unwrap()[..]);
3545 assert_eq!(chan_utils::derive_private_key(&secp_ctx, &per_commitment_point, &base_secret).unwrap(),
3546 SecretKey::from_slice(&secp_ctx, &hex::decode("cbced912d3b21bf196a766651e436aff192362621ce317704ea2f75d87e7be0f").unwrap()[..]).unwrap());
3548 assert_eq!(chan_utils::derive_public_revocation_key(&secp_ctx, &per_commitment_point, &base_point).unwrap().serialize()[..],
3549 hex::decode("02916e326636d19c33f13e8c0c3a03dd157f332f3e99c317c141dd865eb01f8ff0").unwrap()[..]);
3551 assert_eq!(chan_utils::derive_private_revocation_key(&secp_ctx, &per_commitment_secret, &base_secret).unwrap(),
3552 SecretKey::from_slice(&secp_ctx, &hex::decode("d09ffff62ddb2297ab000cc85bcb4283fdeb6aa052affbc9dddcf33b61078110").unwrap()[..]).unwrap());