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, MsgEncodable};
18 use ln::channelmonitor::ChannelMonitor;
19 use ln::channelmanager::{PendingForwardHTLCInfo, HTLCFailReason};
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::sha2::Sha256;
28 use std::default::Default;
30 use std::time::Instant;
32 pub struct ChannelKeys {
33 pub funding_key: SecretKey,
34 pub revocation_base_key: SecretKey,
35 pub payment_base_key: SecretKey,
36 pub delayed_payment_base_key: SecretKey,
37 pub htlc_base_key: SecretKey,
38 pub channel_close_key: SecretKey,
39 pub channel_monitor_claim_key: SecretKey,
40 pub commitment_seed: [u8; 32],
44 pub fn new_from_seed(seed: &[u8; 32]) -> Result<ChannelKeys, secp256k1::Error> {
45 let mut prk = [0; 32];
46 hkdf_extract(Sha256::new(), b"rust-lightning key gen salt", seed, &mut prk);
47 let secp_ctx = Secp256k1::without_caps();
49 let mut okm = [0; 32];
50 hkdf_expand(Sha256::new(), &prk, b"rust-lightning funding key info", &mut okm);
51 let funding_key = SecretKey::from_slice(&secp_ctx, &okm)?;
53 hkdf_expand(Sha256::new(), &prk, b"rust-lightning revocation base key info", &mut okm);
54 let revocation_base_key = SecretKey::from_slice(&secp_ctx, &okm)?;
56 hkdf_expand(Sha256::new(), &prk, b"rust-lightning payment base key info", &mut okm);
57 let payment_base_key = SecretKey::from_slice(&secp_ctx, &okm)?;
59 hkdf_expand(Sha256::new(), &prk, b"rust-lightning delayed payment base key info", &mut okm);
60 let delayed_payment_base_key = SecretKey::from_slice(&secp_ctx, &okm)?;
62 hkdf_expand(Sha256::new(), &prk, b"rust-lightning htlc base key info", &mut okm);
63 let htlc_base_key = SecretKey::from_slice(&secp_ctx, &okm)?;
65 hkdf_expand(Sha256::new(), &prk, b"rust-lightning channel close key info", &mut okm);
66 let channel_close_key = SecretKey::from_slice(&secp_ctx, &okm)?;
68 hkdf_expand(Sha256::new(), &prk, b"rust-lightning channel monitor claim key info", &mut okm);
69 let channel_monitor_claim_key = SecretKey::from_slice(&secp_ctx, &okm)?;
71 hkdf_expand(Sha256::new(), &prk, b"rust-lightning local commitment seed info", &mut okm);
74 funding_key: funding_key,
75 revocation_base_key: revocation_base_key,
76 payment_base_key: payment_base_key,
77 delayed_payment_base_key: delayed_payment_base_key,
78 htlc_base_key: htlc_base_key,
79 channel_close_key: channel_close_key,
80 channel_monitor_claim_key: channel_monitor_claim_key,
88 /// Added by remote, to be included in next local commitment tx.
90 /// Included in a received commitment_signed message (implying we've revoke_and_ack'ed it), but
91 /// the remote side hasn't yet revoked their previous state, which we need them to do before we
92 /// accept this HTLC. Implies AwaitingRemoteRevoke.
93 /// We also have not yet included this HTLC in a commitment_signed message, and are waiting on
94 /// a remote revoke_and_ack on a previous state before we can do so.
95 AwaitingRemoteRevokeToAnnounce,
96 /// Included in a received commitment_signed message (implying we've revoke_and_ack'ed it), but
97 /// the remote side hasn't yet revoked their previous state, which we need them to do before we
98 /// accept this HTLC. Implies AwaitingRemoteRevoke.
99 /// We have included this HTLC in our latest commitment_signed and are now just waiting on a
101 AwaitingAnnouncedRemoteRevoke,
102 /// Added by us and included in a commitment_signed (if we were AwaitingRemoteRevoke when we
103 /// created it we would have put it in the holding cell instead). When they next revoke_and_ack
104 /// we will promote to Committed (note that they may not accept it until the next time we
105 /// revoke, but we dont really care about that:
106 /// * they've revoked, so worst case we can announce an old state and get our (option on)
107 /// money back (though we wont), and,
108 /// * we'll send them a revoke when they send a commitment_signed, and since only they're
109 /// allowed to remove it, the "can only be removed once committed on both sides" requirement
110 /// doesn't matter to us and its up to them to enforce it, worst-case they jump ahead but
111 /// we'll never get out of sync).
114 /// Remote removed this (outbound) HTLC. We're waiting on their commitment_signed to finalize
115 /// the change (though they'll need to revoke before we fail the payment).
117 /// Remote removed this and sent a commitment_signed (implying we've revoke_and_ack'ed it), but
118 /// the remote side hasn't yet revoked their previous state, which we need them to do before we
119 /// can do any backwards failing. Implies AwaitingRemoteRevoke.
120 /// We also have not yet removed this HTLC in a commitment_signed message, and are waiting on a
121 /// remote revoke_and_ack on a previous state before we can do so.
122 AwaitingRemoteRevokeToRemove,
123 /// Remote removed this and sent a commitment_signed (implying we've revoke_and_ack'ed it), but
124 /// the remote side hasn't yet revoked their previous state, which we need them to do before we
125 /// can do any backwards failing. Implies AwaitingRemoteRevoke.
126 /// We have removed this HTLC in our latest commitment_signed and are now just waiting on a
127 /// revoke_and_ack to drop completely.
128 AwaitingRemovedRemoteRevoke,
129 /// Removed by us and a new commitment_signed was sent (if we were AwaitingRemoteRevoke when we
130 /// created it we would have put it in the holding cell instead). When they next revoke_and_ack
131 /// we'll promote to LocalRemovedAwaitingCommitment if we fulfilled, otherwise we'll drop at
133 /// Note that we have to keep an eye on the HTLC until we've received a broadcastable
134 /// commitment transaction without it as otherwise we'll have to force-close the channel to
135 /// claim it before the timeout (obviously doesn't apply to revoked HTLCs that we can't claim
138 /// Removed by us, sent a new commitment_signed and got a revoke_and_ack. Just waiting on an
139 /// updated local commitment transaction. Implies local_removed_fulfilled.
140 LocalRemovedAwaitingCommitment,
143 struct HTLCOutput { //TODO: Refactor into Outbound/InboundHTLCOutput (will save memory and fewer panics)
144 outbound: bool, // ie to an HTLC-Timeout transaction
148 payment_hash: [u8; 32],
150 /// If we're in a Remote* removed state, set if they failed, otherwise None
151 fail_reason: Option<HTLCFailReason>,
152 /// If we're in LocalRemoved*, set to true if we fulfilled the HTLC, and can claim money
153 local_removed_fulfilled: bool,
154 /// state pre-committed Remote* implies pending_forward_state, otherwise it must be None
155 pending_forward_state: Option<PendingForwardHTLCInfo>,
159 fn get_in_commitment(&self, offered: bool) -> HTLCOutputInCommitment {
160 HTLCOutputInCommitment {
162 amount_msat: self.amount_msat,
163 cltv_expiry: self.cltv_expiry,
164 payment_hash: self.payment_hash,
165 transaction_output_index: 0
170 /// See AwaitingRemoteRevoke ChannelState for more info
171 enum HTLCUpdateAwaitingACK {
176 payment_hash: [u8; 32],
177 onion_routing_packet: msgs::OnionPacket,
178 time_created: Instant, //TODO: Some kind of timeout thing-a-majig
181 payment_preimage: [u8; 32],
182 payment_hash: [u8; 32], // Only here for effecient duplicate detection
185 payment_hash: [u8; 32],
186 err_packet: msgs::OnionErrorPacket,
191 /// Implies we have (or are prepared to) send our open_channel/accept_channel message
192 OurInitSent = (1 << 0),
193 /// Implies we have received their open_channel/accept_channel message
194 TheirInitSent = (1 << 1),
195 /// We have sent funding_created and are awaiting a funding_signed to advance to FundingSent.
196 /// Note that this is nonsense for an inbound channel as we immediately generate funding_signed
197 /// upon receipt of funding_created, so simply skip this state.
199 /// Set when we have received/sent funding_created and funding_signed and are thus now waiting
200 /// on the funding transaction to confirm. The FundingLocked flags are set to indicate when we
201 /// and our counterparty consider the funding transaction confirmed.
203 /// Flag which can be set on FundingSent to indicate they sent us a funding_locked message.
204 /// Once both TheirFundingLocked and OurFundingLocked are set, state moves on to ChannelFunded.
205 TheirFundingLocked = (1 << 4),
206 /// Flag which can be set on FundingSent to indicate we sent them a funding_locked message.
207 /// Once both TheirFundingLocked and OurFundingLocked are set, state moves on to ChannelFunded.
208 OurFundingLocked = (1 << 5),
210 /// Flag which implies that we have sent a commitment_signed but are awaiting the responding
211 /// revoke_and_ack message. During this time period, we can't generate new commitment_signed
212 /// messages as then we will be unable to determine which HTLCs they included in their
213 /// revoke_and_ack implicit ACK, so instead we have to hold them away temporarily to be sent
215 /// Flag is set on ChannelFunded.
216 AwaitingRemoteRevoke = (1 << 7),
217 /// Flag which is set on ChannelFunded or FundingSent after receiving a shutdown message from
218 /// the remote end. If set, they may not add any new HTLCs to the channel, and we are expected
219 /// to respond with our own shutdown message when possible.
220 RemoteShutdownSent = (1 << 8),
221 /// Flag which is set on ChannelFunded or FundingSent after sending a shutdown message. At this
222 /// point, we may not add any new HTLCs to the channel.
223 /// TODO: Investigate some kind of timeout mechanism by which point the remote end must provide
224 /// us their shutdown.
225 LocalShutdownSent = (1 << 9),
226 /// We've successfully negotiated a closing_signed dance. At this point ChannelManager is about
227 /// to drop us, but we store this anyway.
228 ShutdownComplete = (1 << 10),
230 const BOTH_SIDES_SHUTDOWN_MASK: u32 = (ChannelState::LocalShutdownSent as u32 | ChannelState::RemoteShutdownSent as u32);
232 // TODO: We should refactor this to be an Inbound/OutboundChannel until initial setup handshaking
233 // has been completed, and then turn into a Channel to get compiler-time enforcement of things like
234 // calling channel_id() before we're set up or things like get_outbound_funding_signed on an
239 channel_id: [u8; 32],
241 channel_outbound: bool,
243 announce_publicly: bool,
244 channel_value_satoshis: u64,
246 local_keys: ChannelKeys,
248 // Our commitment numbers start at 2^48-1 and count down, whereas the ones used in transaction
249 // generation start at 0 and count up...this simplifies some parts of implementation at the
250 // cost of others, but should really just be changed.
252 cur_local_commitment_transaction_number: u64,
253 cur_remote_commitment_transaction_number: u64,
254 value_to_self_msat: u64, // Excluding all pending_htlcs, excluding fees
255 pending_htlcs: Vec<HTLCOutput>,
256 holding_cell_htlc_updates: Vec<HTLCUpdateAwaitingACK>,
257 next_local_htlc_id: u64,
258 next_remote_htlc_id: u64,
259 channel_update_count: u32,
263 // Used in ChannelManager's tests to send a revoked transaction
264 pub last_local_commitment_txn: Vec<Transaction>,
266 last_local_commitment_txn: Vec<Transaction>,
268 last_sent_closing_fee: Option<(u64, u64)>, // (feerate, fee)
270 /// The hash of the block in which the funding transaction reached our CONF_TARGET. We use this
271 /// to detect unconfirmation after a serialize-unserialize roudtrip where we may not see a full
272 /// series of block_connected/block_disconnected calls. Obviously this is not a guarantee as we
273 /// could miss the funding_tx_confirmed_in block as well, but it serves as a useful fallback.
274 funding_tx_confirmed_in: Sha256dHash,
275 short_channel_id: Option<u64>,
276 /// Used to deduplicate block_connected callbacks
277 last_block_connected: Sha256dHash,
278 funding_tx_confirmations: u64,
280 their_dust_limit_satoshis: u64,
281 our_dust_limit_satoshis: u64,
282 their_max_htlc_value_in_flight_msat: u64,
283 //get_our_max_htlc_value_in_flight_msat(): u64,
284 their_channel_reserve_satoshis: u64,
285 //get_our_channel_reserve_satoshis(): u64,
286 their_htlc_minimum_msat: u64,
287 our_htlc_minimum_msat: u64,
288 their_to_self_delay: u16,
289 //implied by BREAKDOWN_TIMEOUT: our_to_self_delay: u16,
290 their_max_accepted_htlcs: u16,
291 //implied by OUR_MAX_HTLCS: our_max_accepted_htlcs: u16,
293 their_funding_pubkey: PublicKey,
294 their_revocation_basepoint: PublicKey,
295 their_payment_basepoint: PublicKey,
296 their_delayed_payment_basepoint: PublicKey,
297 their_htlc_basepoint: PublicKey,
298 their_cur_commitment_point: PublicKey,
300 their_prev_commitment_point: Option<PublicKey>,
301 their_node_id: PublicKey,
303 their_shutdown_scriptpubkey: Option<Script>,
305 channel_monitor: ChannelMonitor,
308 const OUR_MAX_HTLCS: u16 = 5; //TODO
309 const CONF_TARGET: u32 = 12; //TODO: Should be much higher
310 /// Confirmation count threshold at which we close a channel. Ideally we'd keep the channel around
311 /// on ice until the funding transaction gets more confirmations, but the LN protocol doesn't
312 /// really allow for this, so instead we're stuck closing it out at that point.
313 const UNCONF_THRESHOLD: u32 = 6;
314 /// The amount of time we require our counterparty wait to claim their money (ie time between when
315 /// we, or our watchtower, must check for them having broadcast a theft transaction).
316 const BREAKDOWN_TIMEOUT: u16 = 6 * 24 * 7; //TODO?
317 /// The amount of time we're willing to wait to claim money back to us
318 const MAX_LOCAL_BREAKDOWN_TIMEOUT: u16 = 6 * 24 * 14;
319 const COMMITMENT_TX_BASE_WEIGHT: u64 = 724;
320 const COMMITMENT_TX_WEIGHT_PER_HTLC: u64 = 172;
321 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
322 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?)
323 /// Maximmum `funding_satoshis` value, according to the BOLT #2 specification
325 pub const MAX_FUNDING_SATOSHIS: u64 = (1 << 24);
327 macro_rules! secp_call {
328 ( $res: expr, $err: expr ) => {
331 //TODO: make the error a parameter
332 Err(_) => return Err(HandleError{err: $err, action: Some(msgs::ErrorAction::DisconnectPeer{ msg: None })})
337 macro_rules! secp_derived_key {
339 secp_call!($res, "Derived invalid key, peer is maliciously selecting parameters")
343 // Convert constants + channel value to limits:
344 fn get_our_max_htlc_value_in_flight_msat(channel_value_satoshis: u64) -> u64 {
345 channel_value_satoshis * 1000 / 10 //TODO
348 /// Guaranteed to return a value no larger than channel_value_satoshis
349 fn get_our_channel_reserve_satoshis(channel_value_satoshis: u64) -> u64 {
350 cmp::min(channel_value_satoshis, 1000) //TODO
353 fn derive_our_dust_limit_satoshis(at_open_background_feerate: u64) -> u64 {
354 at_open_background_feerate * B_OUTPUT_PLUS_SPENDING_INPUT_WEIGHT / 1000 //TODO
357 fn derive_our_htlc_minimum_msat(_at_open_channel_feerate_per_kw: u64) -> u64 {
363 /// panics if channel_value_satoshis is >= `MAX_FUNDING_SATOSHIS`
364 pub fn new_outbound(fee_estimator: &FeeEstimator, chan_keys: ChannelKeys, their_node_id: PublicKey, channel_value_satoshis: u64, announce_publicly: bool, user_id: u64) -> Channel {
365 if channel_value_satoshis >= MAX_FUNDING_SATOSHIS {
366 panic!("funding value > 2^24");
369 let feerate = fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Normal);
370 let background_feerate = fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Background);
372 let secp_ctx = Secp256k1::new();
373 let our_channel_monitor_claim_key_hash = Hash160::from_data(&PublicKey::from_secret_key(&secp_ctx, &chan_keys.channel_monitor_claim_key).unwrap().serialize());
374 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();
375 let channel_monitor = ChannelMonitor::new(&chan_keys.revocation_base_key,
376 &PublicKey::from_secret_key(&secp_ctx, &chan_keys.delayed_payment_base_key).unwrap(),
377 &chan_keys.htlc_base_key,
378 BREAKDOWN_TIMEOUT, our_channel_monitor_claim_script);
383 channel_id: rng::rand_u832(),
384 channel_state: ChannelState::OurInitSent as u32,
385 channel_outbound: true,
387 announce_publicly: announce_publicly,
388 channel_value_satoshis: channel_value_satoshis,
390 local_keys: chan_keys,
391 cur_local_commitment_transaction_number: (1 << 48) - 1,
392 cur_remote_commitment_transaction_number: (1 << 48) - 1,
393 value_to_self_msat: channel_value_satoshis * 1000, //TODO: give them something on open? Parameterize it?
394 pending_htlcs: Vec::new(),
395 holding_cell_htlc_updates: Vec::new(),
396 next_local_htlc_id: 0,
397 next_remote_htlc_id: 0,
398 channel_update_count: 1,
400 last_local_commitment_txn: Vec::new(),
402 last_sent_closing_fee: None,
404 funding_tx_confirmed_in: Default::default(),
405 short_channel_id: None,
406 last_block_connected: Default::default(),
407 funding_tx_confirmations: 0,
409 feerate_per_kw: feerate,
410 their_dust_limit_satoshis: 0,
411 our_dust_limit_satoshis: Channel::derive_our_dust_limit_satoshis(background_feerate),
412 their_max_htlc_value_in_flight_msat: 0,
413 their_channel_reserve_satoshis: 0,
414 their_htlc_minimum_msat: 0,
415 our_htlc_minimum_msat: Channel::derive_our_htlc_minimum_msat(feerate),
416 their_to_self_delay: 0,
417 their_max_accepted_htlcs: 0,
419 their_funding_pubkey: PublicKey::new(),
420 their_revocation_basepoint: PublicKey::new(),
421 their_payment_basepoint: PublicKey::new(),
422 their_delayed_payment_basepoint: PublicKey::new(),
423 their_htlc_basepoint: PublicKey::new(),
424 their_cur_commitment_point: PublicKey::new(),
426 their_prev_commitment_point: None,
427 their_node_id: their_node_id,
429 their_shutdown_scriptpubkey: None,
431 channel_monitor: channel_monitor,
435 fn check_remote_fee(fee_estimator: &FeeEstimator, feerate_per_kw: u32) -> Result<(), HandleError> {
436 if (feerate_per_kw as u64) < fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Background) {
437 return Err(HandleError{err: "Peer's feerate much too low", action: Some(msgs::ErrorAction::DisconnectPeer{ msg: None })});
439 if (feerate_per_kw as u64) > fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::HighPriority) * 2 {
440 return Err(HandleError{err: "Peer's feerate much too high", action: Some(msgs::ErrorAction::DisconnectPeer{ msg: None })});
445 /// Creates a new channel from a remote sides' request for one.
446 /// Assumes chain_hash has already been checked and corresponds with what we expect!
447 /// Generally prefers to take the DisconnectPeer action on failure, as a notice to the sender
448 /// that we're rejecting the new channel.
449 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) -> Result<Channel, HandleError> {
450 // Check sanity of message fields:
451 if msg.funding_satoshis >= MAX_FUNDING_SATOSHIS {
452 return Err(HandleError{err: "funding value > 2^24", action: Some(msgs::ErrorAction::DisconnectPeer{ msg: None })});
454 if msg.channel_reserve_satoshis > msg.funding_satoshis {
455 return Err(HandleError{err: "Bogus channel_reserve_satoshis", action: Some(msgs::ErrorAction::DisconnectPeer{ msg: None })});
457 if msg.push_msat > (msg.funding_satoshis - msg.channel_reserve_satoshis) * 1000 {
458 return Err(HandleError{err: "push_msat more than highest possible value", action: Some(msgs::ErrorAction::DisconnectPeer{ msg: None })});
460 if msg.dust_limit_satoshis > msg.funding_satoshis {
461 return Err(HandleError{err: "Peer never wants payout outputs?", action: Some(msgs::ErrorAction::DisconnectPeer{ msg: None })});
463 if msg.htlc_minimum_msat >= (msg.funding_satoshis - msg.channel_reserve_satoshis) * 1000 {
464 return Err(HandleError{err: "Minimum htlc value is full channel value", action: Some(msgs::ErrorAction::DisconnectPeer{ msg: None })});
466 Channel::check_remote_fee(fee_estimator, msg.feerate_per_kw)?;
467 if msg.to_self_delay > MAX_LOCAL_BREAKDOWN_TIMEOUT {
468 return Err(HandleError{err: "They wanted our payments to be delayed by a needlessly long period", action: Some(msgs::ErrorAction::DisconnectPeer{ msg: None })});
470 if msg.max_accepted_htlcs < 1 {
471 return Err(HandleError{err: "0 max_accpted_htlcs makes for a useless channel", action: Some(msgs::ErrorAction::DisconnectPeer{ msg: None })});
473 if (msg.channel_flags & 254) != 0 {
474 return Err(HandleError{err: "unknown channel_flags", action: Some(msgs::ErrorAction::DisconnectPeer{ msg: None })});
477 // Convert things into internal flags and prep our state:
479 let their_announce = if (msg.channel_flags & 1) == 1 { true } else { false };
480 if require_announce && !their_announce {
481 return Err(HandleError{err: "Peer tried to open unannounced channel, but we require public ones", action: Some(msgs::ErrorAction::IgnoreError) });
483 if !allow_announce && their_announce {
484 return Err(HandleError{err: "Peer tried to open announced channel, but we require private ones", action: Some(msgs::ErrorAction::IgnoreError) });
487 let background_feerate = fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Background);
489 let secp_ctx = Secp256k1::new();
490 let our_channel_monitor_claim_key_hash = Hash160::from_data(&PublicKey::from_secret_key(&secp_ctx, &chan_keys.channel_monitor_claim_key).unwrap().serialize());
491 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();
492 let mut channel_monitor = ChannelMonitor::new(&chan_keys.revocation_base_key,
493 &PublicKey::from_secret_key(&secp_ctx, &chan_keys.delayed_payment_base_key).unwrap(),
494 &chan_keys.htlc_base_key,
495 BREAKDOWN_TIMEOUT, our_channel_monitor_claim_script);
496 channel_monitor.set_their_htlc_base_key(&msg.htlc_basepoint);
497 channel_monitor.set_their_to_self_delay(msg.to_self_delay);
499 let mut chan = Channel {
502 channel_id: msg.temporary_channel_id,
503 channel_state: (ChannelState::OurInitSent as u32) | (ChannelState::TheirInitSent as u32),
504 channel_outbound: false,
506 announce_publicly: their_announce,
508 local_keys: chan_keys,
509 cur_local_commitment_transaction_number: (1 << 48) - 1,
510 cur_remote_commitment_transaction_number: (1 << 48) - 1,
511 value_to_self_msat: msg.push_msat,
512 pending_htlcs: Vec::new(),
513 holding_cell_htlc_updates: Vec::new(),
514 next_local_htlc_id: 0,
515 next_remote_htlc_id: 0,
516 channel_update_count: 1,
518 last_local_commitment_txn: Vec::new(),
520 last_sent_closing_fee: None,
522 funding_tx_confirmed_in: Default::default(),
523 short_channel_id: None,
524 last_block_connected: Default::default(),
525 funding_tx_confirmations: 0,
527 feerate_per_kw: msg.feerate_per_kw as u64,
528 channel_value_satoshis: msg.funding_satoshis,
529 their_dust_limit_satoshis: msg.dust_limit_satoshis,
530 our_dust_limit_satoshis: Channel::derive_our_dust_limit_satoshis(background_feerate),
531 their_max_htlc_value_in_flight_msat: cmp::min(msg.max_htlc_value_in_flight_msat, msg.funding_satoshis * 1000),
532 their_channel_reserve_satoshis: msg.channel_reserve_satoshis,
533 their_htlc_minimum_msat: msg.htlc_minimum_msat,
534 our_htlc_minimum_msat: Channel::derive_our_htlc_minimum_msat(msg.feerate_per_kw as u64),
535 their_to_self_delay: msg.to_self_delay,
536 their_max_accepted_htlcs: msg.max_accepted_htlcs,
538 their_funding_pubkey: msg.funding_pubkey,
539 their_revocation_basepoint: msg.revocation_basepoint,
540 their_payment_basepoint: msg.payment_basepoint,
541 their_delayed_payment_basepoint: msg.delayed_payment_basepoint,
542 their_htlc_basepoint: msg.htlc_basepoint,
543 their_cur_commitment_point: msg.first_per_commitment_point,
545 their_prev_commitment_point: None,
546 their_node_id: their_node_id,
548 their_shutdown_scriptpubkey: None,
550 channel_monitor: channel_monitor,
553 let obscure_factor = chan.get_commitment_transaction_number_obscure_factor();
554 chan.channel_monitor.set_commitment_obscure_factor(obscure_factor);
559 // Utilities to derive keys:
561 fn build_local_commitment_secret(&self, idx: u64) -> SecretKey {
562 let res = chan_utils::build_commitment_secret(self.local_keys.commitment_seed, idx);
563 SecretKey::from_slice(&self.secp_ctx, &res).unwrap()
566 // Utilities to build transactions:
568 fn get_commitment_transaction_number_obscure_factor(&self) -> u64 {
569 let mut sha = Sha256::new();
570 let our_payment_basepoint = PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.payment_base_key).unwrap();
572 if self.channel_outbound {
573 sha.input(&our_payment_basepoint.serialize());
574 sha.input(&self.their_payment_basepoint.serialize());
576 sha.input(&self.their_payment_basepoint.serialize());
577 sha.input(&our_payment_basepoint.serialize());
579 let mut res = [0; 32];
580 sha.result(&mut res);
582 ((res[26] as u64) << 5*8) |
583 ((res[27] as u64) << 4*8) |
584 ((res[28] as u64) << 3*8) |
585 ((res[29] as u64) << 2*8) |
586 ((res[30] as u64) << 1*8) |
587 ((res[31] as u64) << 0*8)
590 /// Transaction nomenclature is somewhat confusing here as there are many different cases - a
591 /// transaction is referred to as "a's transaction" implying that a will be able to broadcast
592 /// the transaction. Thus, b will generally be sending a signature over such a transaction to
593 /// a, and a can revoke the transaction by providing b the relevant per_commitment_secret. As
594 /// such, a transaction is generally the result of b increasing the amount paid to a (or adding
596 /// @local is used only to convert relevant internal structures which refer to remote vs local
597 /// to decide value of outputs and direction of HTLCs.
598 /// @generated_by_local is used to determine *which* HTLCs to include - noting that the HTLC
599 /// state may indicate that one peer has informed the other that they'd like to add an HTLC but
600 /// have not yet committed it. Such HTLCs will only be included in transactions which are being
601 /// generated by the peer which proposed adding the HTLCs, and thus we need to understand both
602 /// which peer generated this transaction and "to whom" this transaction flows.
604 fn build_commitment_transaction(&self, commitment_number: u64, keys: &TxCreationKeys, local: bool, generated_by_local: bool) -> (Transaction, Vec<HTLCOutputInCommitment>) {
605 let obscured_commitment_transaction_number = self.get_commitment_transaction_number_obscure_factor() ^ (0xffffffffffff - commitment_number);
608 let mut ins: Vec<TxIn> = Vec::new();
610 prev_hash: self.channel_monitor.get_funding_txo().unwrap().txid,
611 prev_index: self.channel_monitor.get_funding_txo().unwrap().index as u32,
612 script_sig: Script::new(),
613 sequence: ((0x80 as u32) << 8*3) | ((obscured_commitment_transaction_number >> 3*8) as u32),
619 let mut txouts: Vec<(TxOut, Option<HTLCOutputInCommitment>)> = Vec::with_capacity(self.pending_htlcs.len() + 2);
621 let dust_limit_satoshis = if local { self.our_dust_limit_satoshis } else { self.their_dust_limit_satoshis };
622 let mut remote_htlc_total_msat = 0;
623 let mut local_htlc_total_msat = 0;
624 let mut value_to_self_msat_offset = 0;
626 for ref htlc in self.pending_htlcs.iter() {
627 let include = match htlc.state {
628 HTLCState::RemoteAnnounced => !generated_by_local,
629 HTLCState::AwaitingRemoteRevokeToAnnounce => !generated_by_local,
630 HTLCState::AwaitingAnnouncedRemoteRevoke => true,
631 HTLCState::LocalAnnounced => generated_by_local,
632 HTLCState::Committed => true,
633 HTLCState::RemoteRemoved => generated_by_local,
634 HTLCState::AwaitingRemoteRevokeToRemove => generated_by_local,
635 HTLCState::AwaitingRemovedRemoteRevoke => false,
636 HTLCState::LocalRemoved => !generated_by_local,
637 HTLCState::LocalRemovedAwaitingCommitment => false,
641 if htlc.outbound == local { // "offered HTLC output"
642 if htlc.amount_msat / 1000 >= dust_limit_satoshis + (self.feerate_per_kw * HTLC_TIMEOUT_TX_WEIGHT / 1000) {
643 let htlc_in_tx = htlc.get_in_commitment(true);
645 script_pubkey: chan_utils::get_htlc_redeemscript(&htlc_in_tx, &keys).to_v0_p2wsh(),
646 value: htlc.amount_msat / 1000
647 }, Some(htlc_in_tx)));
650 if htlc.amount_msat / 1000 >= dust_limit_satoshis + (self.feerate_per_kw * HTLC_SUCCESS_TX_WEIGHT / 1000) {
651 let htlc_in_tx = htlc.get_in_commitment(false);
652 txouts.push((TxOut { // "received HTLC output"
653 script_pubkey: chan_utils::get_htlc_redeemscript(&htlc_in_tx, &keys).to_v0_p2wsh(),
654 value: htlc.amount_msat / 1000
655 }, Some(htlc_in_tx)));
659 local_htlc_total_msat += htlc.amount_msat;
661 remote_htlc_total_msat += htlc.amount_msat;
665 HTLCState::AwaitingRemoteRevokeToRemove|HTLCState::AwaitingRemovedRemoteRevoke => {
666 if htlc.fail_reason.is_none() {
667 value_to_self_msat_offset -= htlc.amount_msat as i64;
670 HTLCState::RemoteRemoved => {
671 if !generated_by_local && htlc.fail_reason.is_none() {
672 value_to_self_msat_offset -= htlc.amount_msat as i64;
675 HTLCState::LocalRemoved => {
676 if generated_by_local && htlc.local_removed_fulfilled {
677 value_to_self_msat_offset += htlc.amount_msat as i64;
680 HTLCState::LocalRemovedAwaitingCommitment => {
681 assert!(htlc.local_removed_fulfilled);
682 value_to_self_msat_offset += htlc.amount_msat as i64;
689 let total_fee: u64 = self.feerate_per_kw * (COMMITMENT_TX_BASE_WEIGHT + (txouts.len() as u64) * COMMITMENT_TX_WEIGHT_PER_HTLC) / 1000;
690 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 };
691 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 };
693 let value_to_a = if local { value_to_self } else { value_to_remote };
694 let value_to_b = if local { value_to_remote } else { value_to_self };
696 if value_to_a >= (dust_limit_satoshis as i64) {
698 script_pubkey: chan_utils::get_revokeable_redeemscript(&keys.revocation_key,
699 if local { self.their_to_self_delay } else { BREAKDOWN_TIMEOUT },
700 &keys.a_delayed_payment_key).to_v0_p2wsh(),
701 value: value_to_a as u64
705 if value_to_b >= (dust_limit_satoshis as i64) {
707 script_pubkey: Builder::new().push_opcode(opcodes::All::OP_PUSHBYTES_0)
708 .push_slice(&Hash160::from_data(&keys.b_payment_key.serialize())[..])
710 value: value_to_b as u64
714 transaction_utils::sort_outputs(&mut txouts);
716 let mut outputs: Vec<TxOut> = Vec::with_capacity(txouts.len());
717 let mut htlcs_used: Vec<HTLCOutputInCommitment> = Vec::with_capacity(txouts.len());
718 for (idx, out) in txouts.drain(..).enumerate() {
720 if let Some(out_htlc) = out.1 {
721 htlcs_used.push(out_htlc);
722 htlcs_used.last_mut().unwrap().transaction_output_index = idx as u32;
728 lock_time: ((0x20 as u32) << 8*3) | ((obscured_commitment_transaction_number & 0xffffffu64) as u32),
735 fn get_closing_scriptpubkey(&self) -> Script {
736 let our_channel_close_key_hash = Hash160::from_data(&PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.channel_close_key).unwrap().serialize());
737 Builder::new().push_opcode(opcodes::All::OP_PUSHBYTES_0).push_slice(&our_channel_close_key_hash[..]).into_script()
741 fn get_closing_transaction_weight(a_scriptpubkey: &Script, b_scriptpubkey: &Script) -> u64 {
742 (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)
746 fn build_closing_transaction(&self, proposed_total_fee_satoshis: u64, skip_remote_output: bool) -> (Transaction, u64) {
748 let mut ins: Vec<TxIn> = Vec::new();
750 prev_hash: self.channel_monitor.get_funding_txo().unwrap().txid,
751 prev_index: self.channel_monitor.get_funding_txo().unwrap().index as u32,
752 script_sig: Script::new(),
753 sequence: 0xffffffff,
759 assert!(self.pending_htlcs.is_empty());
760 let mut txouts: Vec<(TxOut, ())> = Vec::new();
762 let mut total_fee_satoshis = proposed_total_fee_satoshis;
763 let value_to_self: i64 = (self.value_to_self_msat as i64) / 1000 - if self.channel_outbound { total_fee_satoshis as i64 } else { 0 };
764 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 };
766 if value_to_self < 0 {
767 assert!(self.channel_outbound);
768 total_fee_satoshis += (-value_to_self) as u64;
769 } else if value_to_remote < 0 {
770 assert!(!self.channel_outbound);
771 total_fee_satoshis += (-value_to_remote) as u64;
774 if !skip_remote_output && value_to_remote as u64 > self.our_dust_limit_satoshis {
776 script_pubkey: self.their_shutdown_scriptpubkey.clone().unwrap(),
777 value: value_to_remote as u64
781 if value_to_self as u64 > self.our_dust_limit_satoshis {
783 script_pubkey: self.get_closing_scriptpubkey(),
784 value: value_to_self as u64
788 transaction_utils::sort_outputs(&mut txouts);
790 let mut outputs: Vec<TxOut> = Vec::new();
791 for out in txouts.drain(..) {
800 }, total_fee_satoshis)
804 /// Creates a set of keys for build_commitment_transaction to generate a transaction which our
805 /// counterparty will sign (ie DO NOT send signatures over a transaction created by this to
806 /// our counterparty!)
807 /// The result is a transaction which we can revoke ownership of (ie a "local" transaction)
808 /// TODO Some magic rust shit to compile-time check this?
809 fn build_local_transaction_keys(&self, commitment_number: u64) -> Result<TxCreationKeys, HandleError> {
810 let per_commitment_point = PublicKey::from_secret_key(&self.secp_ctx, &self.build_local_commitment_secret(commitment_number)).unwrap();
811 let delayed_payment_base = PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.delayed_payment_base_key).unwrap();
812 let htlc_basepoint = PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.htlc_base_key).unwrap();
814 Ok(secp_derived_key!(TxCreationKeys::new(&self.secp_ctx, &per_commitment_point, &delayed_payment_base, &htlc_basepoint, &self.their_revocation_basepoint, &self.their_payment_basepoint, &self.their_htlc_basepoint)))
818 /// Creates a set of keys for build_commitment_transaction to generate a transaction which we
819 /// will sign and send to our counterparty.
820 fn build_remote_transaction_keys(&self) -> Result<TxCreationKeys, HandleError> {
821 //TODO: Ensure that the payment_key derived here ends up in the library users' wallet as we
822 //may see payments to it!
823 let payment_basepoint = PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.payment_base_key).unwrap();
824 let revocation_basepoint = PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.revocation_base_key).unwrap();
825 let htlc_basepoint = PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.htlc_base_key).unwrap();
827 Ok(secp_derived_key!(TxCreationKeys::new(&self.secp_ctx, &self.their_cur_commitment_point, &self.their_delayed_payment_basepoint, &self.their_htlc_basepoint, &revocation_basepoint, &payment_basepoint, &htlc_basepoint)))
830 /// Gets the redeemscript for the funding transaction output (ie the funding transaction output
831 /// pays to get_funding_redeemscript().to_v0_p2wsh()).
832 pub fn get_funding_redeemscript(&self) -> Script {
833 let builder = Builder::new().push_opcode(opcodes::All::OP_PUSHNUM_2);
834 let our_funding_key = PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.funding_key).unwrap().serialize();
835 let their_funding_key = self.their_funding_pubkey.serialize();
836 if our_funding_key[..] < their_funding_key[..] {
837 builder.push_slice(&our_funding_key)
838 .push_slice(&their_funding_key)
840 builder.push_slice(&their_funding_key)
841 .push_slice(&our_funding_key)
842 }.push_opcode(opcodes::All::OP_PUSHNUM_2).push_opcode(opcodes::All::OP_CHECKMULTISIG).into_script()
845 fn sign_commitment_transaction(&self, tx: &mut Transaction, their_sig: &Signature) -> Signature {
846 if tx.input.len() != 1 {
847 panic!("Tried to sign commitment transaction that had input count != 1!");
849 if tx.input[0].witness.len() != 0 {
850 panic!("Tried to re-sign commitment transaction");
853 let funding_redeemscript = self.get_funding_redeemscript();
855 let sighash = Message::from_slice(&bip143::SighashComponents::new(&tx).sighash_all(&tx.input[0], &funding_redeemscript, self.channel_value_satoshis)[..]).unwrap();
856 let our_sig = self.secp_ctx.sign(&sighash, &self.local_keys.funding_key).unwrap();
858 tx.input[0].witness.push(Vec::new()); // First is the multisig dummy
860 let our_funding_key = PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.funding_key).unwrap().serialize();
861 let their_funding_key = self.their_funding_pubkey.serialize();
862 if our_funding_key[..] < their_funding_key[..] {
863 tx.input[0].witness.push(our_sig.serialize_der(&self.secp_ctx).to_vec());
864 tx.input[0].witness.push(their_sig.serialize_der(&self.secp_ctx).to_vec());
866 tx.input[0].witness.push(their_sig.serialize_der(&self.secp_ctx).to_vec());
867 tx.input[0].witness.push(our_sig.serialize_der(&self.secp_ctx).to_vec());
869 tx.input[0].witness[1].push(SigHashType::All as u8);
870 tx.input[0].witness[2].push(SigHashType::All as u8);
872 tx.input[0].witness.push(funding_redeemscript.into_vec());
877 /// Builds the htlc-success or htlc-timeout transaction which spends a given HTLC output
878 /// @local is used only to convert relevant internal structures which refer to remote vs local
879 /// to decide value of outputs and direction of HTLCs.
880 fn build_htlc_transaction(&self, prev_hash: &Sha256dHash, htlc: &HTLCOutputInCommitment, local: bool, keys: &TxCreationKeys) -> Transaction {
881 chan_utils::build_htlc_transaction(prev_hash, self.feerate_per_kw, if local { self.their_to_self_delay } else { BREAKDOWN_TIMEOUT }, htlc, &keys.a_delayed_payment_key, &keys.revocation_key)
884 fn create_htlc_tx_signature(&self, tx: &Transaction, htlc: &HTLCOutputInCommitment, keys: &TxCreationKeys) -> Result<(Script, Signature, bool), HandleError> {
885 if tx.input.len() != 1 {
886 panic!("Tried to sign HTLC transaction that had input count != 1!");
889 let htlc_redeemscript = chan_utils::get_htlc_redeemscript(&htlc, &keys);
891 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));
892 let sighash = Message::from_slice(&bip143::SighashComponents::new(&tx).sighash_all(&tx.input[0], &htlc_redeemscript, htlc.amount_msat / 1000)[..]).unwrap();
893 let is_local_tx = PublicKey::from_secret_key(&self.secp_ctx, &our_htlc_key).unwrap() == keys.a_htlc_key;
894 Ok((htlc_redeemscript, self.secp_ctx.sign(&sighash, &our_htlc_key).unwrap(), is_local_tx))
897 /// Signs a transaction created by build_htlc_transaction. If the transaction is an
898 /// HTLC-Success transaction (ie htlc.offered is false), preimate must be set!
899 fn sign_htlc_transaction(&self, tx: &mut Transaction, their_sig: &Signature, preimage: &Option<[u8; 32]>, htlc: &HTLCOutputInCommitment, keys: &TxCreationKeys) -> Result<Signature, HandleError> {
900 if tx.input.len() != 1 {
901 panic!("Tried to sign HTLC transaction that had input count != 1!");
903 if tx.input[0].witness.len() != 0 {
904 panic!("Tried to re-sign HTLC transaction");
907 let (htlc_redeemscript, our_sig, local_tx) = self.create_htlc_tx_signature(tx, htlc, keys)?;
909 tx.input[0].witness.push(Vec::new()); // First is the multisig dummy
911 if local_tx { // b, then a
912 tx.input[0].witness.push(their_sig.serialize_der(&self.secp_ctx).to_vec());
913 tx.input[0].witness.push(our_sig.serialize_der(&self.secp_ctx).to_vec());
915 tx.input[0].witness.push(our_sig.serialize_der(&self.secp_ctx).to_vec());
916 tx.input[0].witness.push(their_sig.serialize_der(&self.secp_ctx).to_vec());
918 tx.input[0].witness[1].push(SigHashType::All as u8);
919 tx.input[0].witness[2].push(SigHashType::All as u8);
922 tx.input[0].witness.push(Vec::new());
924 tx.input[0].witness.push(preimage.unwrap().to_vec());
927 tx.input[0].witness.push(htlc_redeemscript.into_vec());
932 fn get_update_fulfill_htlc(&mut self, payment_preimage_arg: [u8; 32]) -> Result<(Option<msgs::UpdateFulfillHTLC>, Option<ChannelMonitor>), HandleError> {
933 // Either ChannelFunded got set (which means it wont bet unset) or there is no way any
934 // caller thought we could have something claimed (cause we wouldn't have accepted in an
935 // incoming HTLC anyway). If we got to ShutdownComplete, callers aren't allowed to call us,
937 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
938 panic!("Was asked to fulfill an HTLC when channel was not in an operational state");
940 assert_eq!(self.channel_state & ChannelState::ShutdownComplete as u32, 0);
942 let mut sha = Sha256::new();
943 sha.input(&payment_preimage_arg);
944 let mut payment_hash_calc = [0; 32];
945 sha.result(&mut payment_hash_calc);
947 let mut pending_idx = std::usize::MAX;
948 for (idx, htlc) in self.pending_htlcs.iter().enumerate() {
949 if !htlc.outbound && htlc.payment_hash == payment_hash_calc {
950 if pending_idx != std::usize::MAX {
951 panic!("Duplicate HTLC payment_hash, you probably re-used payment preimages, NEVER DO THIS!");
956 if pending_idx == std::usize::MAX {
957 return Err(HandleError{err: "Unable to find a pending HTLC which matched the given payment preimage", action: None});
960 // Now update local state:
962 // We have to put the payment_preimage in the channel_monitor right away here to ensure we
963 // can claim it even if the channel hits the chain before we see their next commitment.
964 self.channel_monitor.provide_payment_preimage(&payment_hash_calc, &payment_preimage_arg);
966 if (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32)) == (ChannelState::AwaitingRemoteRevoke as u32) {
967 for pending_update in self.holding_cell_htlc_updates.iter() {
968 match pending_update {
969 &HTLCUpdateAwaitingACK::ClaimHTLC { ref payment_preimage, .. } => {
970 if payment_preimage_arg == *payment_preimage {
971 return Ok((None, None));
974 &HTLCUpdateAwaitingACK::FailHTLC { ref payment_hash, .. } => {
975 if payment_hash_calc == *payment_hash {
976 return Err(HandleError{err: "Unable to find a pending HTLC which matched the given payment preimage", action: None});
982 self.holding_cell_htlc_updates.push(HTLCUpdateAwaitingACK::ClaimHTLC {
983 payment_preimage: payment_preimage_arg, payment_hash: payment_hash_calc,
985 return Ok((None, Some(self.channel_monitor.clone())));
989 let htlc = &mut self.pending_htlcs[pending_idx];
990 if htlc.state == HTLCState::Committed {
991 htlc.state = HTLCState::LocalRemoved;
992 htlc.local_removed_fulfilled = true;
993 } else if htlc.state == HTLCState::RemoteAnnounced {
994 panic!("Somehow forwarded HTLC prior to remote revocation!");
995 } else if htlc.state == HTLCState::LocalRemoved || htlc.state == HTLCState::LocalRemovedAwaitingCommitment {
996 return Err(HandleError{err: "Unable to find a pending HTLC which matched the given payment preimage", action: None});
998 panic!("Have an inbound HTLC when not awaiting remote revoke that had a garbage state");
1003 Ok((Some(msgs::UpdateFulfillHTLC {
1004 channel_id: self.channel_id(),
1006 payment_preimage: payment_preimage_arg,
1007 }), Some(self.channel_monitor.clone())))
1010 pub fn get_update_fulfill_htlc_and_commit(&mut self, payment_preimage: [u8; 32]) -> Result<(Option<(msgs::UpdateFulfillHTLC, msgs::CommitmentSigned)>, Option<ChannelMonitor>), HandleError> {
1011 match self.get_update_fulfill_htlc(payment_preimage)? {
1012 (Some(update_fulfill_htlc), _) => {
1013 let (commitment, monitor_update) = self.send_commitment_no_status_check()?;
1014 Ok((Some((update_fulfill_htlc, commitment)), Some(monitor_update)))
1016 (None, Some(channel_monitor)) => Ok((None, Some(channel_monitor))),
1017 (None, None) => Ok((None, None))
1021 pub fn get_update_fail_htlc(&mut self, payment_hash_arg: &[u8; 32], err_packet: msgs::OnionErrorPacket) -> Result<Option<msgs::UpdateFailHTLC>, HandleError> {
1022 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
1023 return Err(HandleError{err: "Was asked to fail an HTLC when channel was not in an operational state", action: None});
1025 assert_eq!(self.channel_state & ChannelState::ShutdownComplete as u32, 0);
1027 // Now update local state:
1028 if (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32)) == (ChannelState::AwaitingRemoteRevoke as u32) {
1029 for pending_update in self.holding_cell_htlc_updates.iter() {
1030 match pending_update {
1031 &HTLCUpdateAwaitingACK::ClaimHTLC { ref payment_hash, .. } => {
1032 if *payment_hash_arg == *payment_hash {
1033 return Err(HandleError{err: "Unable to find a pending HTLC which matched the given payment preimage", action: None});
1036 &HTLCUpdateAwaitingACK::FailHTLC { ref payment_hash, .. } => {
1037 if *payment_hash_arg == *payment_hash {
1044 self.holding_cell_htlc_updates.push(HTLCUpdateAwaitingACK::FailHTLC {
1045 payment_hash: payment_hash_arg.clone(),
1051 let mut htlc_id = 0;
1052 let mut htlc_amount_msat = 0;
1053 for htlc in self.pending_htlcs.iter_mut() {
1054 if !htlc.outbound && htlc.payment_hash == *payment_hash_arg {
1056 panic!("Duplicate HTLC payment_hash, you probably re-used payment preimages, NEVER DO THIS!");
1058 htlc_id = htlc.htlc_id;
1059 htlc_amount_msat += htlc.amount_msat;
1060 if htlc.state == HTLCState::Committed {
1061 htlc.state = HTLCState::LocalRemoved;
1062 } else if htlc.state == HTLCState::RemoteAnnounced {
1063 panic!("Somehow forwarded HTLC prior to remote revocation!");
1064 } else if htlc.state == HTLCState::LocalRemoved || htlc.state == HTLCState::LocalRemovedAwaitingCommitment {
1065 return Err(HandleError{err: "Unable to find a pending HTLC which matched the given payment preimage", action: None});
1067 panic!("Have an inbound HTLC when not awaiting remote revoke that had a garbage state");
1071 if htlc_amount_msat == 0 {
1072 return Err(HandleError{err: "Unable to find a pending HTLC which matched the given payment preimage", action: None});
1075 Ok(Some(msgs::UpdateFailHTLC {
1076 channel_id: self.channel_id(),
1082 pub fn get_update_fail_htlc_and_commit(&mut self, payment_hash: &[u8; 32], err_packet: msgs::OnionErrorPacket) -> Result<Option<(msgs::UpdateFailHTLC, msgs::CommitmentSigned, ChannelMonitor)>, HandleError> {
1083 match self.get_update_fail_htlc(payment_hash, err_packet)? {
1084 Some(update_fail_htlc) => {
1085 let (commitment, monitor_update) = self.send_commitment_no_status_check()?;
1086 Ok(Some((update_fail_htlc, commitment, monitor_update)))
1092 // Message handlers:
1094 pub fn accept_channel(&mut self, msg: &msgs::AcceptChannel) -> Result<(), HandleError> {
1095 // Check sanity of message fields:
1096 if !self.channel_outbound {
1097 return Err(HandleError{err: "Got an accept_channel message from an inbound peer", action: None});
1099 if self.channel_state != ChannelState::OurInitSent as u32 {
1100 return Err(HandleError{err: "Got an accept_channel message at a strange time", action: None});
1102 if msg.dust_limit_satoshis > 21000000 * 100000000 {
1103 return Err(HandleError{err: "Peer never wants payout outputs?", action: None});
1105 if msg.channel_reserve_satoshis > self.channel_value_satoshis {
1106 return Err(HandleError{err: "Bogus channel_reserve_satoshis", action: None});
1108 if msg.htlc_minimum_msat >= (self.channel_value_satoshis - msg.channel_reserve_satoshis) * 1000 {
1109 return Err(HandleError{err: "Minimum htlc value is full channel value", action: None});
1111 //TODO do something with minimum_depth
1112 if msg.to_self_delay > MAX_LOCAL_BREAKDOWN_TIMEOUT {
1113 return Err(HandleError{err: "They wanted our payments to be delayed by a needlessly long period", action: None});
1115 if msg.max_accepted_htlcs < 1 {
1116 return Err(HandleError{err: "0 max_accpted_htlcs makes for a useless channel", action: None});
1119 self.channel_monitor.set_their_htlc_base_key(&msg.htlc_basepoint);
1121 self.their_dust_limit_satoshis = msg.dust_limit_satoshis;
1122 self.their_max_htlc_value_in_flight_msat = cmp::min(msg.max_htlc_value_in_flight_msat, self.channel_value_satoshis * 1000);
1123 self.their_channel_reserve_satoshis = msg.channel_reserve_satoshis;
1124 self.their_htlc_minimum_msat = msg.htlc_minimum_msat;
1125 self.their_to_self_delay = msg.to_self_delay;
1126 self.their_max_accepted_htlcs = msg.max_accepted_htlcs;
1127 self.their_funding_pubkey = msg.funding_pubkey;
1128 self.their_revocation_basepoint = msg.revocation_basepoint;
1129 self.their_payment_basepoint = msg.payment_basepoint;
1130 self.their_delayed_payment_basepoint = msg.delayed_payment_basepoint;
1131 self.their_htlc_basepoint = msg.htlc_basepoint;
1132 self.their_cur_commitment_point = msg.first_per_commitment_point;
1134 let obscure_factor = self.get_commitment_transaction_number_obscure_factor();
1135 self.channel_monitor.set_commitment_obscure_factor(obscure_factor);
1136 self.channel_monitor.set_their_to_self_delay(msg.to_self_delay);
1138 self.channel_state = ChannelState::OurInitSent as u32 | ChannelState::TheirInitSent as u32;
1143 fn funding_created_signature(&mut self, sig: &Signature) -> Result<(Transaction, Signature), HandleError> {
1144 let funding_script = self.get_funding_redeemscript();
1146 let remote_keys = self.build_remote_transaction_keys()?;
1147 let remote_initial_commitment_tx = self.build_commitment_transaction(self.cur_remote_commitment_transaction_number, &remote_keys, false, false).0;
1148 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();
1150 let local_keys = self.build_local_transaction_keys(self.cur_local_commitment_transaction_number)?;
1151 let local_initial_commitment_tx = self.build_commitment_transaction(self.cur_local_commitment_transaction_number, &local_keys, true, false).0;
1152 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();
1154 // They sign the "local" commitment transaction, allowing us to broadcast the tx if we wish.
1155 secp_call!(self.secp_ctx.verify(&local_sighash, &sig, &self.their_funding_pubkey), "Invalid funding_created signature from peer");
1157 // We sign the "remote" commitment transaction, allowing them to broadcast the tx if they wish.
1158 Ok((remote_initial_commitment_tx, self.secp_ctx.sign(&remote_sighash, &self.local_keys.funding_key).unwrap()))
1161 pub fn funding_created(&mut self, msg: &msgs::FundingCreated) -> Result<(msgs::FundingSigned, ChannelMonitor), HandleError> {
1162 if self.channel_outbound {
1163 return Err(HandleError{err: "Received funding_created for an outbound channel?", action: None});
1165 if self.channel_state != (ChannelState::OurInitSent as u32 | ChannelState::TheirInitSent as u32) {
1166 return Err(HandleError{err: "Received funding_created after we got the channel!", action: None});
1168 if self.channel_monitor.get_min_seen_secret() != (1 << 48) || self.cur_remote_commitment_transaction_number != (1 << 48) - 1 || self.cur_local_commitment_transaction_number != (1 << 48) - 1 {
1169 panic!("Should not have advanced channel commitment tx numbers prior to funding_created");
1172 let funding_txo = OutPoint::new(msg.funding_txid, msg.funding_output_index);
1173 let funding_txo_script = self.get_funding_redeemscript().to_v0_p2wsh();
1174 self.channel_monitor.set_funding_info((funding_txo, funding_txo_script));
1176 let (remote_initial_commitment_tx, our_signature) = match self.funding_created_signature(&msg.signature) {
1179 self.channel_monitor.unset_funding_info();
1184 // Now that we're past error-generating stuff, update our local state:
1186 self.channel_monitor.provide_latest_remote_commitment_tx_info(&remote_initial_commitment_tx, Vec::new(), self.cur_remote_commitment_transaction_number);
1187 self.channel_state = ChannelState::FundingSent as u32;
1188 self.channel_id = funding_txo.to_channel_id();
1189 self.cur_remote_commitment_transaction_number -= 1;
1190 self.cur_local_commitment_transaction_number -= 1;
1192 Ok((msgs::FundingSigned {
1193 channel_id: self.channel_id,
1194 signature: our_signature
1195 }, self.channel_monitor.clone()))
1198 /// Handles a funding_signed message from the remote end.
1199 /// If this call is successful, broadcast the funding transaction (and not before!)
1200 pub fn funding_signed(&mut self, msg: &msgs::FundingSigned) -> Result<ChannelMonitor, HandleError> {
1201 if !self.channel_outbound {
1202 return Err(HandleError{err: "Received funding_signed for an inbound channel?", action: None});
1204 if self.channel_state != ChannelState::FundingCreated as u32 {
1205 return Err(HandleError{err: "Received funding_signed in strange state!", action: None});
1207 if self.channel_monitor.get_min_seen_secret() != (1 << 48) || self.cur_remote_commitment_transaction_number != (1 << 48) - 2 || self.cur_local_commitment_transaction_number != (1 << 48) - 1 {
1208 panic!("Should not have advanced channel commitment tx numbers prior to funding_created");
1211 let funding_script = self.get_funding_redeemscript();
1213 let local_keys = self.build_local_transaction_keys(self.cur_local_commitment_transaction_number)?;
1214 let mut local_initial_commitment_tx = self.build_commitment_transaction(self.cur_local_commitment_transaction_number, &local_keys, true, false).0;
1215 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();
1217 // They sign the "local" commitment transaction, allowing us to broadcast the tx if we wish.
1218 secp_call!(self.secp_ctx.verify(&local_sighash, &msg.signature, &self.their_funding_pubkey), "Invalid funding_signed signature from peer");
1220 self.sign_commitment_transaction(&mut local_initial_commitment_tx, &msg.signature);
1221 self.channel_monitor.provide_latest_local_commitment_tx_info(local_initial_commitment_tx.clone(), local_keys, self.feerate_per_kw, Vec::new());
1222 self.last_local_commitment_txn = vec![local_initial_commitment_tx];
1223 self.channel_state = ChannelState::FundingSent as u32;
1224 self.cur_local_commitment_transaction_number -= 1;
1226 Ok(self.channel_monitor.clone())
1229 pub fn funding_locked(&mut self, msg: &msgs::FundingLocked) -> Result<(), HandleError> {
1230 let non_shutdown_state = self.channel_state & (!BOTH_SIDES_SHUTDOWN_MASK);
1231 if non_shutdown_state == ChannelState::FundingSent as u32 {
1232 self.channel_state |= ChannelState::TheirFundingLocked as u32;
1233 } else if non_shutdown_state == (ChannelState::FundingSent as u32 | ChannelState::OurFundingLocked as u32) {
1234 self.channel_state = ChannelState::ChannelFunded as u32 | (self.channel_state & BOTH_SIDES_SHUTDOWN_MASK);
1235 self.channel_update_count += 1;
1237 return Err(HandleError{err: "Peer sent a funding_locked at a strange time", action: None});
1240 self.their_prev_commitment_point = Some(self.their_cur_commitment_point);
1241 self.their_cur_commitment_point = msg.next_per_commitment_point;
1245 /// Returns (inbound_htlc_count, outbound_htlc_count, htlc_outbound_value_msat, htlc_inbound_value_msat)
1246 /// If its for a remote update check, we need to be more lax about checking against messages we
1247 /// sent but they may not have received/processed before they sent this message. Further, for
1248 /// our own sends, we're more conservative and even consider things they've removed against
1249 /// totals, though there is little reason to outside of further avoiding any race condition
1251 fn get_pending_htlc_stats(&self, for_remote_update_check: bool) -> (u32, u32, u64, u64) {
1252 let mut inbound_htlc_count: u32 = 0;
1253 let mut outbound_htlc_count: u32 = 0;
1254 let mut htlc_outbound_value_msat = 0;
1255 let mut htlc_inbound_value_msat = 0;
1256 for ref htlc in self.pending_htlcs.iter() {
1258 HTLCState::RemoteAnnounced => {},
1259 HTLCState::AwaitingRemoteRevokeToAnnounce => {},
1260 HTLCState::AwaitingAnnouncedRemoteRevoke => {},
1261 HTLCState::LocalAnnounced => { if for_remote_update_check { continue; } },
1262 HTLCState::Committed => {},
1263 HTLCState::RemoteRemoved => { if for_remote_update_check { continue; } },
1264 HTLCState::AwaitingRemoteRevokeToRemove => { if for_remote_update_check { continue; } },
1265 HTLCState::AwaitingRemovedRemoteRevoke => { if for_remote_update_check { continue; } },
1266 HTLCState::LocalRemoved => {},
1267 HTLCState::LocalRemovedAwaitingCommitment => { if for_remote_update_check { continue; } },
1270 inbound_htlc_count += 1;
1271 htlc_inbound_value_msat += htlc.amount_msat;
1273 outbound_htlc_count += 1;
1274 htlc_outbound_value_msat += htlc.amount_msat;
1277 (inbound_htlc_count, outbound_htlc_count, htlc_outbound_value_msat, htlc_inbound_value_msat)
1280 pub fn update_add_htlc(&mut self, msg: &msgs::UpdateAddHTLC, pending_forward_state: PendingForwardHTLCInfo) -> Result<(), HandleError> {
1281 if (self.channel_state & (ChannelState::ChannelFunded as u32 | ChannelState::RemoteShutdownSent as u32)) != (ChannelState::ChannelFunded as u32) {
1282 return Err(HandleError{err: "Got add HTLC message when channel was not in an operational state", action: None});
1284 if msg.amount_msat > self.channel_value_satoshis * 1000 {
1285 return Err(HandleError{err: "Remote side tried to send more than the total value of the channel", action: None});
1287 if msg.amount_msat < self.our_htlc_minimum_msat {
1288 return Err(HandleError{err: "Remote side tried to send less than our minimum HTLC value", action: None});
1291 let (inbound_htlc_count, _, htlc_outbound_value_msat, htlc_inbound_value_msat) = self.get_pending_htlc_stats(true);
1292 if inbound_htlc_count + 1 > OUR_MAX_HTLCS as u32 {
1293 return Err(HandleError{err: "Remote tried to push more than our max accepted HTLCs", action: None});
1295 //TODO: Spec is unclear if this is per-direction or in total (I assume per direction):
1296 // Check our_max_htlc_value_in_flight_msat
1297 if htlc_inbound_value_msat + msg.amount_msat > Channel::get_our_max_htlc_value_in_flight_msat(self.channel_value_satoshis) {
1298 return Err(HandleError{err: "Remote HTLC add would put them over their max HTLC value in flight", action: None});
1300 // Check our_channel_reserve_satoshis (we're getting paid, so they have to at least meet
1301 // the reserve_satoshis we told them to always have as direct payment so that they lose
1302 // something if we punish them for broadcasting an old state).
1303 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 {
1304 return Err(HandleError{err: "Remote HTLC add would put them over their reserve value", action: None});
1306 if self.next_remote_htlc_id != msg.htlc_id {
1307 return Err(HandleError{err: "Remote skipped HTLC ID", action: None});
1309 if msg.cltv_expiry >= 500000000 {
1310 return Err(HandleError{err: "Remote provided CLTV expiry in seconds instead of block height", action: None});
1313 //TODO: Check msg.cltv_expiry further? Do this in channel manager?
1315 // Now update local state:
1316 self.next_remote_htlc_id += 1;
1317 self.pending_htlcs.push(HTLCOutput {
1319 htlc_id: msg.htlc_id,
1320 amount_msat: msg.amount_msat,
1321 payment_hash: msg.payment_hash,
1322 cltv_expiry: msg.cltv_expiry,
1323 state: HTLCState::RemoteAnnounced,
1325 local_removed_fulfilled: false,
1326 pending_forward_state: Some(pending_forward_state),
1332 /// Removes an outbound HTLC which has been commitment_signed by the remote end
1334 fn mark_outbound_htlc_removed(&mut self, htlc_id: u64, check_preimage: Option<[u8; 32]>, fail_reason: Option<HTLCFailReason>) -> Result<[u8; 32], HandleError> {
1335 for htlc in self.pending_htlcs.iter_mut() {
1336 if htlc.outbound && htlc.htlc_id == htlc_id {
1337 match check_preimage {
1339 Some(payment_hash) =>
1340 if payment_hash != htlc.payment_hash {
1341 return Err(HandleError{err: "Remote tried to fulfill HTLC with an incorrect preimage", action: None});
1344 if htlc.state == HTLCState::LocalAnnounced {
1345 return Err(HandleError{err: "Remote tried to fulfill HTLC before it had been committed", action: None});
1346 } else if htlc.state == HTLCState::Committed {
1347 htlc.state = HTLCState::RemoteRemoved;
1348 htlc.fail_reason = fail_reason;
1349 } else if htlc.state == HTLCState::AwaitingRemoteRevokeToRemove || htlc.state == HTLCState::AwaitingRemovedRemoteRevoke || htlc.state == HTLCState::RemoteRemoved {
1350 return Err(HandleError{err: "Remote tried to fulfill HTLC that they'd already fulfilled", action: None});
1352 panic!("Got a non-outbound state on an outbound HTLC");
1354 return Ok(htlc.payment_hash.clone());
1357 Err(HandleError{err: "Remote tried to fulfill/fail an HTLC we couldn't find", action: None})
1360 pub fn update_fulfill_htlc(&mut self, msg: &msgs::UpdateFulfillHTLC) -> Result<(), HandleError> {
1361 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
1362 return Err(HandleError{err: "Got add HTLC message when channel was not in an operational state", action: None});
1365 let mut sha = Sha256::new();
1366 sha.input(&msg.payment_preimage);
1367 let mut payment_hash = [0; 32];
1368 sha.result(&mut payment_hash);
1370 self.mark_outbound_htlc_removed(msg.htlc_id, Some(payment_hash), None)?;
1374 pub fn update_fail_htlc(&mut self, msg: &msgs::UpdateFailHTLC, fail_reason: HTLCFailReason) -> Result<[u8; 32], HandleError> {
1375 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
1376 return Err(HandleError{err: "Got add HTLC message when channel was not in an operational state", action: None});
1379 self.mark_outbound_htlc_removed(msg.htlc_id, None, Some(fail_reason))
1382 pub fn update_fail_malformed_htlc(&mut self, msg: &msgs::UpdateFailMalformedHTLC, fail_reason: HTLCFailReason) -> Result<(), HandleError> {
1383 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
1384 return Err(HandleError{err: "Got add HTLC message when channel was not in an operational state", action: None});
1387 self.mark_outbound_htlc_removed(msg.htlc_id, None, Some(fail_reason))?;
1391 pub fn commitment_signed(&mut self, msg: &msgs::CommitmentSigned) -> Result<(msgs::RevokeAndACK, Option<msgs::CommitmentSigned>, ChannelMonitor), HandleError> {
1392 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
1393 return Err(HandleError{err: "Got commitment signed message when channel was not in an operational state", action: None});
1396 let funding_script = self.get_funding_redeemscript();
1398 let local_keys = self.build_local_transaction_keys(self.cur_local_commitment_transaction_number)?;
1399 let mut local_commitment_tx = self.build_commitment_transaction(self.cur_local_commitment_transaction_number, &local_keys, true, false);
1400 let local_commitment_txid = local_commitment_tx.0.txid();
1401 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();
1402 secp_call!(self.secp_ctx.verify(&local_sighash, &msg.signature, &self.their_funding_pubkey), "Invalid commitment tx signature from peer");
1404 if msg.htlc_signatures.len() != local_commitment_tx.1.len() {
1405 return Err(HandleError{err: "Got wrong number of HTLC signatures from remote", action: None});
1408 let mut new_local_commitment_txn = Vec::with_capacity(local_commitment_tx.1.len() + 1);
1409 self.sign_commitment_transaction(&mut local_commitment_tx.0, &msg.signature);
1410 new_local_commitment_txn.push(local_commitment_tx.0.clone());
1412 let mut htlcs_and_sigs = Vec::with_capacity(local_commitment_tx.1.len());
1413 for (idx, ref htlc) in local_commitment_tx.1.iter().enumerate() {
1414 let mut htlc_tx = self.build_htlc_transaction(&local_commitment_txid, htlc, true, &local_keys);
1415 let htlc_redeemscript = chan_utils::get_htlc_redeemscript(&htlc, &local_keys);
1416 let htlc_sighash = Message::from_slice(&bip143::SighashComponents::new(&htlc_tx).sighash_all(&htlc_tx.input[0], &htlc_redeemscript, htlc.amount_msat / 1000)[..]).unwrap();
1417 secp_call!(self.secp_ctx.verify(&htlc_sighash, &msg.htlc_signatures[idx], &local_keys.b_htlc_key), "Invalid HTLC tx siganture from peer");
1418 let htlc_sig = if htlc.offered {
1419 let htlc_sig = self.sign_htlc_transaction(&mut htlc_tx, &msg.htlc_signatures[idx], &None, htlc, &local_keys)?;
1420 new_local_commitment_txn.push(htlc_tx);
1423 self.create_htlc_tx_signature(&htlc_tx, htlc, &local_keys)?.1
1425 htlcs_and_sigs.push(((*htlc).clone(), msg.htlc_signatures[idx], htlc_sig));
1428 let next_per_commitment_point = PublicKey::from_secret_key(&self.secp_ctx, &self.build_local_commitment_secret(self.cur_local_commitment_transaction_number - 1)).unwrap();
1429 let per_commitment_secret = chan_utils::build_commitment_secret(self.local_keys.commitment_seed, self.cur_local_commitment_transaction_number + 1);
1431 // Update state now that we've passed all the can-fail calls...
1432 self.channel_monitor.provide_latest_local_commitment_tx_info(local_commitment_tx.0, local_keys, self.feerate_per_kw, htlcs_and_sigs);
1434 let mut need_our_commitment = false;
1435 for htlc in self.pending_htlcs.iter_mut() {
1436 if htlc.state == HTLCState::RemoteAnnounced {
1437 htlc.state = HTLCState::AwaitingRemoteRevokeToAnnounce;
1438 need_our_commitment = true;
1439 } else if htlc.state == HTLCState::RemoteRemoved {
1440 htlc.state = HTLCState::AwaitingRemoteRevokeToRemove;
1441 need_our_commitment = true;
1444 // Finally delete all the LocalRemovedAwaitingCommitment HTLCs
1445 // We really shouldnt have two passes here, but retain gives a non-mutable ref (Rust bug)
1446 let mut claimed_value_msat = 0;
1447 self.pending_htlcs.retain(|htlc| {
1448 if htlc.state == HTLCState::LocalRemovedAwaitingCommitment {
1449 claimed_value_msat += htlc.amount_msat;
1453 self.value_to_self_msat += claimed_value_msat;
1455 self.cur_local_commitment_transaction_number -= 1;
1456 self.last_local_commitment_txn = new_local_commitment_txn;
1458 let (our_commitment_signed, monitor_update) = if need_our_commitment && (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32)) == 0 {
1459 // If we're AwaitingRemoteRevoke we can't send a new commitment here, but that's ok -
1460 // we'll send one right away when we get the revoke_and_ack when we
1461 // free_holding_cell_htlcs().
1462 let (msg, monitor) = self.send_commitment_no_status_check()?;
1463 (Some(msg), monitor)
1464 } else { (None, self.channel_monitor.clone()) };
1466 Ok((msgs::RevokeAndACK {
1467 channel_id: self.channel_id,
1468 per_commitment_secret: per_commitment_secret,
1469 next_per_commitment_point: next_per_commitment_point,
1470 }, our_commitment_signed, monitor_update))
1473 /// Used to fulfill holding_cell_htlcs when we get a remote ack (or implicitly get it by them
1474 /// fulfilling or failing the last pending HTLC)
1475 fn free_holding_cell_htlcs(&mut self) -> Result<Option<(msgs::CommitmentUpdate, ChannelMonitor)>, HandleError> {
1476 if self.holding_cell_htlc_updates.len() != 0 {
1477 let mut htlc_updates = Vec::new();
1478 mem::swap(&mut htlc_updates, &mut self.holding_cell_htlc_updates);
1479 let mut update_add_htlcs = Vec::with_capacity(htlc_updates.len());
1480 let mut update_fulfill_htlcs = Vec::with_capacity(htlc_updates.len());
1481 let mut update_fail_htlcs = Vec::with_capacity(htlc_updates.len());
1483 for htlc_update in htlc_updates.drain(..) {
1484 // Note that this *can* fail, though it should be due to rather-rare conditions on
1485 // fee races with adding too many outputs which push our total payments just over
1486 // the limit. In case its less rare than I anticipate, we may want to revisit
1487 // handling this case better and maybe fufilling some of the HTLCs while attempting
1488 // to rebalance channels.
1489 if err.is_some() { // We're back to AwaitingRemoteRevoke (or are about to fail the channel)
1490 self.holding_cell_htlc_updates.push(htlc_update);
1492 match &htlc_update {
1493 &HTLCUpdateAwaitingACK::AddHTLC {amount_msat, cltv_expiry, payment_hash, ref onion_routing_packet, ..} => {
1494 match self.send_htlc(amount_msat, payment_hash, cltv_expiry, onion_routing_packet.clone()) {
1495 Ok(update_add_msg_option) => update_add_htlcs.push(update_add_msg_option.unwrap()),
1501 &HTLCUpdateAwaitingACK::ClaimHTLC { payment_preimage, .. } => {
1502 match self.get_update_fulfill_htlc(payment_preimage) {
1503 Ok(update_fulfill_msg_option) => update_fulfill_htlcs.push(update_fulfill_msg_option.0.unwrap()),
1509 &HTLCUpdateAwaitingACK::FailHTLC { payment_hash, ref err_packet } => {
1510 match self.get_update_fail_htlc(&payment_hash, err_packet.clone()) {
1511 Ok(update_fail_msg_option) => update_fail_htlcs.push(update_fail_msg_option.unwrap()),
1519 self.holding_cell_htlc_updates.push(htlc_update);
1523 //TODO: Need to examine the type of err - if its a fee issue or similar we may want to
1524 //fail it back the route, if its a temporary issue we can ignore it...
1527 let (commitment_signed, monitor_update) = self.send_commitment_no_status_check()?;
1528 Ok(Some((msgs::CommitmentUpdate {
1530 update_fulfill_htlcs,
1533 }, monitor_update)))
1542 /// Handles receiving a remote's revoke_and_ack. Note that we may return a new
1543 /// commitment_signed message here in case we had pending outbound HTLCs to add which were
1544 /// waiting on this revoke_and_ack. The generation of this new commitment_signed may also fail,
1545 /// generating an appropriate error *after* the channel state has been updated based on the
1546 /// revoke_and_ack message.
1547 pub fn revoke_and_ack(&mut self, msg: &msgs::RevokeAndACK) -> Result<(Option<msgs::CommitmentUpdate>, Vec<PendingForwardHTLCInfo>, Vec<([u8; 32], HTLCFailReason)>, ChannelMonitor), HandleError> {
1548 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
1549 return Err(HandleError{err: "Got revoke/ACK message when channel was not in an operational state", action: None});
1551 if let Some(their_prev_commitment_point) = self.their_prev_commitment_point {
1552 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")).unwrap() != their_prev_commitment_point {
1553 return Err(HandleError{err: "Got a revoke commitment secret which didn't correspond to their current pubkey", action: None});
1556 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)))?;
1558 // Update state now that we've passed all the can-fail calls...
1559 // (note that we may still fail to generate the new commitment_signed message, but that's
1560 // OK, we step the channel here and *then* if the new generation fails we can fail the
1561 // channel based on that, but stepping stuff here should be safe either way.
1562 self.channel_state &= !(ChannelState::AwaitingRemoteRevoke as u32);
1563 self.their_prev_commitment_point = Some(self.their_cur_commitment_point);
1564 self.their_cur_commitment_point = msg.next_per_commitment_point;
1565 self.cur_remote_commitment_transaction_number -= 1;
1567 let mut to_forward_infos = Vec::new();
1568 let mut revoked_htlcs = Vec::new();
1569 let mut require_commitment = false;
1570 let mut value_to_self_msat_diff: i64 = 0;
1571 // We really shouldnt have two passes here, but retain gives a non-mutable ref (Rust bug)
1572 self.pending_htlcs.retain(|htlc| {
1573 if htlc.state == HTLCState::LocalRemoved {
1574 if htlc.local_removed_fulfilled { true } else { false }
1575 } else if htlc.state == HTLCState::AwaitingRemovedRemoteRevoke {
1576 if let Some(reason) = htlc.fail_reason.clone() { // We really want take() here, but, again, non-mut ref :(
1577 revoked_htlcs.push((htlc.payment_hash, reason));
1579 // They fulfilled, so we sent them money
1580 value_to_self_msat_diff -= htlc.amount_msat as i64;
1585 for htlc in self.pending_htlcs.iter_mut() {
1586 if htlc.state == HTLCState::LocalAnnounced {
1587 htlc.state = HTLCState::Committed;
1588 } else if htlc.state == HTLCState::AwaitingRemoteRevokeToAnnounce {
1589 htlc.state = HTLCState::AwaitingAnnouncedRemoteRevoke;
1590 require_commitment = true;
1591 } else if htlc.state == HTLCState::AwaitingAnnouncedRemoteRevoke {
1592 htlc.state = HTLCState::Committed;
1593 to_forward_infos.push(htlc.pending_forward_state.take().unwrap());
1594 } else if htlc.state == HTLCState::AwaitingRemoteRevokeToRemove {
1595 htlc.state = HTLCState::AwaitingRemovedRemoteRevoke;
1596 require_commitment = true;
1597 } else if htlc.state == HTLCState::LocalRemoved {
1598 assert!(htlc.local_removed_fulfilled);
1599 htlc.state = HTLCState::LocalRemovedAwaitingCommitment;
1602 self.value_to_self_msat = (self.value_to_self_msat as i64 + value_to_self_msat_diff) as u64;
1604 match self.free_holding_cell_htlcs()? {
1605 Some(commitment_update) => {
1606 Ok((Some(commitment_update.0), to_forward_infos, revoked_htlcs, commitment_update.1))
1609 if require_commitment {
1610 let (commitment_signed, monitor_update) = self.send_commitment_no_status_check()?;
1611 Ok((Some(msgs::CommitmentUpdate {
1612 update_add_htlcs: Vec::new(),
1613 update_fulfill_htlcs: Vec::new(),
1614 update_fail_htlcs: Vec::new(),
1616 }), to_forward_infos, revoked_htlcs, monitor_update))
1618 Ok((None, to_forward_infos, revoked_htlcs, self.channel_monitor.clone()))
1624 pub fn update_fee(&mut self, fee_estimator: &FeeEstimator, msg: &msgs::UpdateFee) -> Result<(), HandleError> {
1625 if self.channel_outbound {
1626 return Err(HandleError{err: "Non-funding remote tried to update channel fee", action: None});
1628 Channel::check_remote_fee(fee_estimator, msg.feerate_per_kw)?;
1629 self.channel_update_count += 1;
1630 self.feerate_per_kw = msg.feerate_per_kw as u64;
1634 pub fn shutdown(&mut self, fee_estimator: &FeeEstimator, msg: &msgs::Shutdown) -> Result<(Option<msgs::Shutdown>, Option<msgs::ClosingSigned>, Vec<[u8; 32]>), HandleError> {
1635 if self.channel_state < ChannelState::FundingSent as u32 {
1636 self.channel_state = ChannelState::ShutdownComplete as u32;
1637 self.channel_update_count += 1;
1638 return Ok((None, None, Vec::new()));
1640 for htlc in self.pending_htlcs.iter() {
1641 if htlc.state == HTLCState::RemoteAnnounced {
1642 return Err(HandleError{err: "Got shutdown with remote pending HTLCs", action: None});
1645 if (self.channel_state & ChannelState::RemoteShutdownSent as u32) == ChannelState::RemoteShutdownSent as u32 {
1646 return Err(HandleError{err: "Remote peer sent duplicate shutdown message", action: None});
1648 assert_eq!(self.channel_state & ChannelState::ShutdownComplete as u32, 0);
1650 // BOLT 2 says we must only send a scriptpubkey of certain standard forms, which are up to
1651 // 34 bytes in length, so dont let the remote peer feed us some super fee-heavy script.
1652 if self.channel_outbound && msg.scriptpubkey.len() > 34 {
1653 return Err(HandleError{err: "Got shutdown_scriptpubkey of absurd length from remote peer", action: None});
1655 //TODO: Check shutdown_scriptpubkey form as BOLT says we must? WHYYY
1657 if self.their_shutdown_scriptpubkey.is_some() {
1658 if Some(&msg.scriptpubkey) != self.their_shutdown_scriptpubkey.as_ref() {
1659 return Err(HandleError{err: "Got shutdown request with a scriptpubkey which did not match their previous scriptpubkey", action: None});
1662 self.their_shutdown_scriptpubkey = Some(msg.scriptpubkey.clone());
1665 let our_closing_script = self.get_closing_scriptpubkey();
1667 let (proposed_feerate, proposed_fee, our_sig) = if self.channel_outbound && self.pending_htlcs.is_empty() {
1668 let mut proposed_feerate = fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Background);
1669 if self.feerate_per_kw > proposed_feerate {
1670 proposed_feerate = self.feerate_per_kw;
1672 let tx_weight = Self::get_closing_transaction_weight(&our_closing_script, &msg.scriptpubkey);
1673 let proposed_total_fee_satoshis = proposed_feerate * tx_weight / 1000;
1675 let (closing_tx, total_fee_satoshis) = self.build_closing_transaction(proposed_total_fee_satoshis, false);
1676 let funding_redeemscript = self.get_funding_redeemscript();
1677 let sighash = Message::from_slice(&bip143::SighashComponents::new(&closing_tx).sighash_all(&closing_tx.input[0], &funding_redeemscript, self.channel_value_satoshis)[..]).unwrap();
1679 (Some(proposed_feerate), Some(total_fee_satoshis), Some(self.secp_ctx.sign(&sighash, &self.local_keys.funding_key).unwrap()))
1680 } else { (None, None, None) };
1682 // From here on out, we may not fail!
1684 self.channel_state |= ChannelState::RemoteShutdownSent as u32;
1685 self.channel_update_count += 1;
1687 // We can't send our shutdown until we've committed all of our pending HTLCs, but the
1688 // remote side is unlikely to accept any new HTLCs, so we go ahead and "free" any holding
1689 // cell HTLCs and return them to fail the payment.
1690 let mut dropped_outbound_htlcs = Vec::with_capacity(self.holding_cell_htlc_updates.len());
1691 self.holding_cell_htlc_updates.retain(|htlc_update| {
1693 &HTLCUpdateAwaitingACK::AddHTLC { ref payment_hash, .. } => {
1694 dropped_outbound_htlcs.push(payment_hash.clone());
1700 for htlc in self.pending_htlcs.iter() {
1701 if htlc.state == HTLCState::LocalAnnounced {
1702 return Ok((None, None, dropped_outbound_htlcs));
1706 let our_shutdown = if (self.channel_state & ChannelState::LocalShutdownSent as u32) == ChannelState::LocalShutdownSent as u32 {
1709 Some(msgs::Shutdown {
1710 channel_id: self.channel_id,
1711 scriptpubkey: our_closing_script,
1715 self.channel_state |= ChannelState::LocalShutdownSent as u32;
1716 self.channel_update_count += 1;
1717 if self.pending_htlcs.is_empty() && self.channel_outbound {
1718 // There are no more HTLCs and we're the funder, this means we start the closing_signed
1719 // dance with an initial fee proposal!
1720 self.last_sent_closing_fee = Some((proposed_feerate.unwrap(), proposed_fee.unwrap()));
1721 Ok((our_shutdown, Some(msgs::ClosingSigned {
1722 channel_id: self.channel_id,
1723 fee_satoshis: proposed_fee.unwrap(),
1724 signature: our_sig.unwrap(),
1725 }), dropped_outbound_htlcs))
1727 Ok((our_shutdown, None, dropped_outbound_htlcs))
1731 pub fn closing_signed(&mut self, fee_estimator: &FeeEstimator, msg: &msgs::ClosingSigned) -> Result<(Option<msgs::ClosingSigned>, Option<Transaction>), HandleError> {
1732 if self.channel_state & BOTH_SIDES_SHUTDOWN_MASK != BOTH_SIDES_SHUTDOWN_MASK {
1733 return Err(HandleError{err: "Remote end sent us a closing_signed before both sides provided a shutdown", action: None});
1735 if !self.pending_htlcs.is_empty() {
1736 return Err(HandleError{err: "Remote end sent us a closing_signed while there were still pending HTLCs", action: None});
1738 if msg.fee_satoshis > 21000000 * 10000000 {
1739 return Err(HandleError{err: "Remote tried to send us a closing tx with > 21 million BTC fee", action: None});
1742 let funding_redeemscript = self.get_funding_redeemscript();
1743 let (mut closing_tx, used_total_fee) = self.build_closing_transaction(msg.fee_satoshis, false);
1744 if used_total_fee != msg.fee_satoshis {
1745 return Err(HandleError{err: "Remote sent us a closing_signed with a fee greater than the value they can claim", action: None});
1747 let mut sighash = Message::from_slice(&bip143::SighashComponents::new(&closing_tx).sighash_all(&closing_tx.input[0], &funding_redeemscript, self.channel_value_satoshis)[..]).unwrap();
1749 match self.secp_ctx.verify(&sighash, &msg.signature, &self.their_funding_pubkey) {
1752 // The remote end may have decided to revoke their output due to inconsistent dust
1753 // limits, so check for that case by re-checking the signature here.
1754 closing_tx = self.build_closing_transaction(msg.fee_satoshis, true).0;
1755 sighash = Message::from_slice(&bip143::SighashComponents::new(&closing_tx).sighash_all(&closing_tx.input[0], &funding_redeemscript, self.channel_value_satoshis)[..]).unwrap();
1756 secp_call!(self.secp_ctx.verify(&sighash, &msg.signature, &self.their_funding_pubkey), "Invalid closing tx signature from peer");
1760 if let Some((_, last_fee)) = self.last_sent_closing_fee {
1761 if last_fee == msg.fee_satoshis {
1762 self.sign_commitment_transaction(&mut closing_tx, &msg.signature);
1763 self.channel_state = ChannelState::ShutdownComplete as u32;
1764 self.channel_update_count += 1;
1765 return Ok((None, Some(closing_tx)));
1769 macro_rules! propose_new_feerate {
1770 ($new_feerate: expr) => {
1771 let closing_tx_max_weight = Self::get_closing_transaction_weight(&self.get_closing_scriptpubkey(), self.their_shutdown_scriptpubkey.as_ref().unwrap());
1772 let (closing_tx, used_total_fee) = self.build_closing_transaction($new_feerate * closing_tx_max_weight / 1000, false);
1773 sighash = Message::from_slice(&bip143::SighashComponents::new(&closing_tx).sighash_all(&closing_tx.input[0], &funding_redeemscript, self.channel_value_satoshis)[..]).unwrap();
1774 let our_sig = self.secp_ctx.sign(&sighash, &self.local_keys.funding_key).unwrap();
1775 self.last_sent_closing_fee = Some(($new_feerate, used_total_fee));
1776 return Ok((Some(msgs::ClosingSigned {
1777 channel_id: self.channel_id,
1778 fee_satoshis: used_total_fee,
1784 let proposed_sat_per_kw = msg.fee_satoshis * 1000 / closing_tx.get_weight();
1785 if self.channel_outbound {
1786 let our_max_feerate = fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Normal);
1787 if proposed_sat_per_kw > our_max_feerate {
1788 if let Some((last_feerate, _)) = self.last_sent_closing_fee {
1789 if our_max_feerate <= last_feerate {
1790 return Err(HandleError{err: "Unable to come to consensus about closing feerate, remote wanted something higher than our Normal feerate", action: None});
1793 propose_new_feerate!(our_max_feerate);
1796 let our_min_feerate = fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Background);
1797 if proposed_sat_per_kw < our_min_feerate {
1798 if let Some((last_feerate, _)) = self.last_sent_closing_fee {
1799 if our_min_feerate >= last_feerate {
1800 return Err(HandleError{err: "Unable to come to consensus about closing feerate, remote wanted something lower than our Background feerate", action: None});
1803 propose_new_feerate!(our_min_feerate);
1807 let our_sig = self.sign_commitment_transaction(&mut closing_tx, &msg.signature);
1808 self.channel_state = ChannelState::ShutdownComplete as u32;
1809 self.channel_update_count += 1;
1811 Ok((Some(msgs::ClosingSigned {
1812 channel_id: self.channel_id,
1813 fee_satoshis: msg.fee_satoshis,
1815 }), Some(closing_tx)))
1818 // Public utilities:
1820 pub fn channel_id(&self) -> [u8; 32] {
1824 /// Gets the "user_id" value passed into the construction of this channel. It has no special
1825 /// meaning and exists only to allow users to have a persistent identifier of a channel.
1826 pub fn get_user_id(&self) -> u64 {
1830 /// May only be called after funding has been initiated (ie is_funding_initiated() is true)
1831 pub fn channel_monitor(&self) -> ChannelMonitor {
1832 if self.channel_state < ChannelState::FundingCreated as u32 {
1833 panic!("Can't get a channel monitor until funding has been created");
1835 self.channel_monitor.clone()
1838 /// Guaranteed to be Some after both FundingLocked messages have been exchanged (and, thus,
1839 /// is_usable() returns true).
1840 /// Allowed in any state (including after shutdown)
1841 pub fn get_short_channel_id(&self) -> Option<u64> {
1842 self.short_channel_id
1845 /// Returns the funding_txo we either got from our peer, or were given by
1846 /// get_outbound_funding_created.
1847 pub fn get_funding_txo(&self) -> Option<OutPoint> {
1848 self.channel_monitor.get_funding_txo()
1851 /// Allowed in any state (including after shutdown)
1852 pub fn get_their_node_id(&self) -> PublicKey {
1856 /// Allowed in any state (including after shutdown)
1857 pub fn get_our_htlc_minimum_msat(&self) -> u64 {
1858 self.our_htlc_minimum_msat
1861 pub fn get_value_satoshis(&self) -> u64 {
1862 self.channel_value_satoshis
1865 /// Allowed in any state (including after shutdown)
1866 pub fn get_channel_update_count(&self) -> u32 {
1867 self.channel_update_count
1870 pub fn should_announce(&self) -> bool {
1871 self.announce_publicly
1874 /// Gets the fee we'd want to charge for adding an HTLC output to this Channel
1875 /// Allowed in any state (including after shutdown)
1876 pub fn get_our_fee_base_msat(&self, fee_estimator: &FeeEstimator) -> u32 {
1877 // For lack of a better metric, we calculate what it would cost to consolidate the new HTLC
1878 // output value back into a transaction with the regular channel output:
1880 // the fee cost of the HTLC-Success/HTLC-Timeout transaction:
1881 let mut res = self.feerate_per_kw * cmp::max(HTLC_TIMEOUT_TX_WEIGHT, HTLC_SUCCESS_TX_WEIGHT) / 1000;
1883 if self.channel_outbound {
1884 // + the marginal fee increase cost to us in the commitment transaction:
1885 res += self.feerate_per_kw * COMMITMENT_TX_WEIGHT_PER_HTLC / 1000;
1888 // + the marginal cost of an input which spends the HTLC-Success/HTLC-Timeout output:
1889 res += fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Normal) * SPENDING_INPUT_FOR_A_OUTPUT_WEIGHT / 1000;
1894 /// Returns true if this channel is fully established and not known to be closing.
1895 /// Allowed in any state (including after shutdown)
1896 pub fn is_usable(&self) -> bool {
1897 let mask = ChannelState::ChannelFunded as u32 | BOTH_SIDES_SHUTDOWN_MASK;
1898 (self.channel_state & mask) == (ChannelState::ChannelFunded as u32)
1901 /// Returns true if this channel is currently available for use. This is a superset of
1902 /// is_usable() and considers things like the channel being temporarily disabled.
1903 /// Allowed in any state (including after shutdown)
1904 pub fn is_live(&self) -> bool {
1908 /// Returns true if funding_created was sent/received.
1909 pub fn is_funding_initiated(&self) -> bool {
1910 self.channel_state >= ChannelState::FundingCreated as u32
1913 /// Returns true if this channel is fully shut down. True here implies that no further actions
1914 /// may/will be taken on this channel, and thus this object should be freed. Any future changes
1915 /// will be handled appropriately by the chain monitor.
1916 pub fn is_shutdown(&self) -> bool {
1917 if (self.channel_state & ChannelState::ShutdownComplete as u32) == ChannelState::ShutdownComplete as u32 {
1918 assert!(self.channel_state == ChannelState::ShutdownComplete as u32);
1923 /// Called by channelmanager based on chain blocks being connected.
1924 /// Note that we only need to use this to detect funding_signed, anything else is handled by
1925 /// the channel_monitor.
1926 /// In case of Err, the channel may have been closed, at which point the standard requirements
1927 /// apply - no calls may be made except those explicitly stated to be allowed post-shutdown.
1928 /// Only returns an ErrorAction of DisconnectPeer, if Err.
1929 pub fn block_connected(&mut self, header: &BlockHeader, height: u32, txn_matched: &[&Transaction], indexes_of_txn_matched: &[u32]) -> Result<Option<msgs::FundingLocked>, HandleError> {
1930 let non_shutdown_state = self.channel_state & (!BOTH_SIDES_SHUTDOWN_MASK);
1931 if self.funding_tx_confirmations > 0 {
1932 if header.bitcoin_hash() != self.last_block_connected {
1933 self.last_block_connected = header.bitcoin_hash();
1934 self.funding_tx_confirmations += 1;
1935 if self.funding_tx_confirmations == CONF_TARGET as u64 {
1936 if non_shutdown_state == ChannelState::FundingSent as u32 {
1937 self.channel_state |= ChannelState::OurFundingLocked as u32;
1938 } else if non_shutdown_state == (ChannelState::FundingSent as u32 | ChannelState::TheirFundingLocked as u32) {
1939 self.channel_state = ChannelState::ChannelFunded as u32 | (self.channel_state & BOTH_SIDES_SHUTDOWN_MASK);
1940 self.channel_update_count += 1;
1941 //TODO: Something about a state where we "lost confirmation"
1942 } else if self.channel_state < ChannelState::ChannelFunded as u32 {
1943 panic!("Started confirming a channel in a state pre-FundingSent?");
1945 self.funding_tx_confirmed_in = header.bitcoin_hash();
1947 //TODO: Note that this must be a duplicate of the previous commitment point they sent us,
1948 //as otherwise we will have a commitment transaction that they can't revoke (well, kinda,
1949 //they can by sending two revoke_and_acks back-to-back, but not really). This appears to be
1950 //a protocol oversight, but I assume I'm just missing something.
1951 let next_per_commitment_secret = self.build_local_commitment_secret(self.cur_local_commitment_transaction_number);
1952 let next_per_commitment_point = PublicKey::from_secret_key(&self.secp_ctx, &next_per_commitment_secret).unwrap();
1953 return Ok(Some(msgs::FundingLocked {
1954 channel_id: self.channel_id,
1955 next_per_commitment_point: next_per_commitment_point,
1960 if non_shutdown_state & !(ChannelState::TheirFundingLocked as u32) == ChannelState::FundingSent as u32 {
1961 for (ref tx, index_in_block) in txn_matched.iter().zip(indexes_of_txn_matched) {
1962 if tx.txid() == self.channel_monitor.get_funding_txo().unwrap().txid {
1963 let txo_idx = self.channel_monitor.get_funding_txo().unwrap().index as usize;
1964 if txo_idx >= tx.output.len() || tx.output[txo_idx].script_pubkey != self.get_funding_redeemscript().to_v0_p2wsh() ||
1965 tx.output[txo_idx].value != self.channel_value_satoshis {
1966 self.channel_state = ChannelState::ShutdownComplete as u32;
1967 self.channel_update_count += 1;
1968 return Err(HandleError{err: "funding tx had wrong script/value", action: Some(ErrorAction::DisconnectPeer{msg: None})});
1970 self.funding_tx_confirmations = 1;
1971 self.short_channel_id = Some(((height as u64) << (5*8)) |
1972 ((*index_in_block as u64) << (2*8)) |
1973 ((txo_idx as u64) << (0*8)));
1981 /// Called by channelmanager based on chain blocks being disconnected.
1982 /// Returns true if we need to close the channel now due to funding transaction
1983 /// unconfirmation/reorg.
1984 pub fn block_disconnected(&mut self, header: &BlockHeader) -> bool {
1985 if self.funding_tx_confirmations > 0 {
1986 self.funding_tx_confirmations -= 1;
1987 if self.funding_tx_confirmations == UNCONF_THRESHOLD as u64 {
1991 if header.bitcoin_hash() == self.funding_tx_confirmed_in {
1992 self.funding_tx_confirmations = CONF_TARGET as u64 - 1;
1997 // Methods to get unprompted messages to send to the remote end (or where we already returned
1998 // something in the handler for the message that prompted this message):
2000 pub fn get_open_channel(&self, chain_hash: Sha256dHash, fee_estimator: &FeeEstimator) -> Result<msgs::OpenChannel, HandleError> {
2001 if !self.channel_outbound {
2002 panic!("Tried to open a channel for an inbound channel?");
2004 if self.channel_state != ChannelState::OurInitSent as u32 {
2005 return Err(HandleError{err: "Cannot generate an open_channel after we've moved forward", action: None});
2008 if self.cur_local_commitment_transaction_number != (1 << 48) - 1 {
2009 panic!("Tried to send an open_channel for a channel that has already advanced");
2012 let local_commitment_secret = self.build_local_commitment_secret(self.cur_local_commitment_transaction_number);
2014 Ok(msgs::OpenChannel {
2015 chain_hash: chain_hash,
2016 temporary_channel_id: self.channel_id,
2017 funding_satoshis: self.channel_value_satoshis,
2018 push_msat: 0, //TODO: Something about feerate?
2019 dust_limit_satoshis: self.our_dust_limit_satoshis,
2020 max_htlc_value_in_flight_msat: Channel::get_our_max_htlc_value_in_flight_msat(self.channel_value_satoshis),
2021 channel_reserve_satoshis: Channel::get_our_channel_reserve_satoshis(self.channel_value_satoshis),
2022 htlc_minimum_msat: self.our_htlc_minimum_msat,
2023 feerate_per_kw: fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Background) as u32,
2024 to_self_delay: BREAKDOWN_TIMEOUT,
2025 max_accepted_htlcs: OUR_MAX_HTLCS,
2026 funding_pubkey: PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.funding_key).unwrap(),
2027 revocation_basepoint: PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.revocation_base_key).unwrap(),
2028 payment_basepoint: PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.payment_base_key).unwrap(),
2029 delayed_payment_basepoint: PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.delayed_payment_base_key).unwrap(),
2030 htlc_basepoint: PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.htlc_base_key).unwrap(),
2031 first_per_commitment_point: PublicKey::from_secret_key(&self.secp_ctx, &local_commitment_secret).unwrap(),
2032 channel_flags: if self.announce_publicly {1} else {0},
2033 shutdown_scriptpubkey: None,
2037 pub fn get_accept_channel(&self) -> Result<msgs::AcceptChannel, HandleError> {
2038 if self.channel_outbound {
2039 panic!("Tried to send accept_channel for an outbound channel?");
2041 if self.channel_state != (ChannelState::OurInitSent as u32) | (ChannelState::TheirInitSent as u32) {
2042 panic!("Tried to send accept_channel after channel had moved forward");
2044 if self.cur_local_commitment_transaction_number != (1 << 48) - 1 {
2045 panic!("Tried to send an accept_channel for a channel that has already advanced");
2048 let local_commitment_secret = self.build_local_commitment_secret(self.cur_local_commitment_transaction_number);
2050 Ok(msgs::AcceptChannel {
2051 temporary_channel_id: self.channel_id,
2052 dust_limit_satoshis: self.our_dust_limit_satoshis,
2053 max_htlc_value_in_flight_msat: Channel::get_our_max_htlc_value_in_flight_msat(self.channel_value_satoshis),
2054 channel_reserve_satoshis: Channel::get_our_channel_reserve_satoshis(self.channel_value_satoshis),
2055 htlc_minimum_msat: self.our_htlc_minimum_msat,
2056 minimum_depth: CONF_TARGET,
2057 to_self_delay: BREAKDOWN_TIMEOUT,
2058 max_accepted_htlcs: OUR_MAX_HTLCS,
2059 funding_pubkey: PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.funding_key).unwrap(),
2060 revocation_basepoint: PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.revocation_base_key).unwrap(),
2061 payment_basepoint: PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.payment_base_key).unwrap(),
2062 delayed_payment_basepoint: PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.delayed_payment_base_key).unwrap(),
2063 htlc_basepoint: PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.htlc_base_key).unwrap(),
2064 first_per_commitment_point: PublicKey::from_secret_key(&self.secp_ctx, &local_commitment_secret).unwrap(),
2065 shutdown_scriptpubkey: None,
2069 fn get_outbound_funding_created_signature(&mut self) -> Result<(Signature, Transaction), HandleError> {
2070 let funding_script = self.get_funding_redeemscript();
2072 let remote_keys = self.build_remote_transaction_keys()?;
2073 let remote_initial_commitment_tx = self.build_commitment_transaction(self.cur_remote_commitment_transaction_number, &remote_keys, false, false).0;
2074 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();
2076 // We sign the "remote" commitment transaction, allowing them to broadcast the tx if they wish.
2077 Ok((self.secp_ctx.sign(&remote_sighash, &self.local_keys.funding_key).unwrap(), remote_initial_commitment_tx))
2080 /// Updates channel state with knowledge of the funding transaction's txid/index, and generates
2081 /// a funding_created message for the remote peer.
2082 /// Panics if called at some time other than immediately after initial handshake, if called twice,
2083 /// or if called on an inbound channel.
2084 /// Note that channel_id changes during this call!
2085 /// Do NOT broadcast the funding transaction until after a successful funding_signed call!
2086 pub fn get_outbound_funding_created(&mut self, funding_txo: OutPoint) -> Result<(msgs::FundingCreated, ChannelMonitor), HandleError> {
2087 if !self.channel_outbound {
2088 panic!("Tried to create outbound funding_created message on an inbound channel!");
2090 if self.channel_state != (ChannelState::OurInitSent as u32 | ChannelState::TheirInitSent as u32) {
2091 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)");
2093 if self.channel_monitor.get_min_seen_secret() != (1 << 48) || self.cur_remote_commitment_transaction_number != (1 << 48) - 1 || self.cur_local_commitment_transaction_number != (1 << 48) - 1 {
2094 panic!("Should not have advanced channel commitment tx numbers prior to funding_created");
2097 let funding_txo_script = self.get_funding_redeemscript().to_v0_p2wsh();
2098 self.channel_monitor.set_funding_info((funding_txo, funding_txo_script));
2100 let (our_signature, commitment_tx) = match self.get_outbound_funding_created_signature() {
2103 self.channel_monitor.unset_funding_info();
2108 let temporary_channel_id = self.channel_id;
2110 // Now that we're past error-generating stuff, update our local state:
2111 self.channel_monitor.provide_latest_remote_commitment_tx_info(&commitment_tx, Vec::new(), self.cur_remote_commitment_transaction_number);
2112 self.channel_state = ChannelState::FundingCreated as u32;
2113 self.channel_id = funding_txo.to_channel_id();
2114 self.cur_remote_commitment_transaction_number -= 1;
2116 Ok((msgs::FundingCreated {
2117 temporary_channel_id: temporary_channel_id,
2118 funding_txid: funding_txo.txid,
2119 funding_output_index: funding_txo.index,
2120 signature: our_signature
2121 }, self.channel_monitor.clone()))
2124 /// Gets an UnsignedChannelAnnouncement, as well as a signature covering it using our
2125 /// bitcoin_key, if available, for this channel. The channel must be publicly announceable and
2126 /// available for use (have exchanged FundingLocked messages in both directions. Should be used
2127 /// for both loose and in response to an AnnouncementSignatures message from the remote peer.
2128 /// Note that you can get an announcement for a channel which is closing, though you should
2129 /// likely not announce such a thing. In case its already been announced, a channel_update
2130 /// message can mark the channel disabled.
2131 pub fn get_channel_announcement(&self, our_node_id: PublicKey, chain_hash: Sha256dHash) -> Result<(msgs::UnsignedChannelAnnouncement, Signature), HandleError> {
2132 if !self.announce_publicly {
2133 return Err(HandleError{err: "Channel is not available for public announcements", action: None});
2135 if self.channel_state & (ChannelState::ChannelFunded as u32) != (ChannelState::ChannelFunded as u32) {
2136 return Err(HandleError{err: "Cannot get a ChannelAnnouncement until the channel funding has been locked", action: None});
2139 let were_node_one = our_node_id.serialize()[..] < self.their_node_id.serialize()[..];
2140 let our_bitcoin_key = PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.funding_key).unwrap();
2142 let msg = msgs::UnsignedChannelAnnouncement {
2143 features: msgs::GlobalFeatures::new(),
2144 chain_hash: chain_hash,
2145 short_channel_id: self.get_short_channel_id().unwrap(),
2146 node_id_1: if were_node_one { our_node_id } else { self.get_their_node_id() },
2147 node_id_2: if were_node_one { self.get_their_node_id() } else { our_node_id },
2148 bitcoin_key_1: if were_node_one { our_bitcoin_key } else { self.their_funding_pubkey },
2149 bitcoin_key_2: if were_node_one { self.their_funding_pubkey } else { our_bitcoin_key },
2152 let msghash = Message::from_slice(&Sha256dHash::from_data(&msg.encode()[..])[..]).unwrap();
2153 let sig = self.secp_ctx.sign(&msghash, &self.local_keys.funding_key).unwrap();
2159 // Send stuff to our remote peers:
2161 /// Adds a pending outbound HTLC to this channel, note that you probably want
2162 /// send_htlc_and_commit instead cause you'll want both messages at once.
2163 /// This returns an option instead of a pure UpdateAddHTLC as we may be in a state where we are
2164 /// waiting on the remote peer to send us a revoke_and_ack during which time we cannot add new
2165 /// HTLCs on the wire or we wouldn't be able to determine what they actually ACK'ed.
2166 pub fn send_htlc(&mut self, amount_msat: u64, payment_hash: [u8; 32], cltv_expiry: u32, onion_routing_packet: msgs::OnionPacket) -> Result<Option<msgs::UpdateAddHTLC>, HandleError> {
2167 if (self.channel_state & (ChannelState::ChannelFunded as u32 | BOTH_SIDES_SHUTDOWN_MASK)) != (ChannelState::ChannelFunded as u32) {
2168 return Err(HandleError{err: "Cannot send HTLC until channel is fully established and we haven't started shutting down", action: None});
2171 if amount_msat > self.channel_value_satoshis * 1000 {
2172 return Err(HandleError{err: "Cannot send more than the total value of the channel", action: None});
2174 if amount_msat < self.their_htlc_minimum_msat {
2175 return Err(HandleError{err: "Cannot send less than their minimum HTLC value", action: None});
2178 let (_, outbound_htlc_count, htlc_outbound_value_msat, htlc_inbound_value_msat) = self.get_pending_htlc_stats(false);
2179 if outbound_htlc_count + 1 > self.their_max_accepted_htlcs as u32 {
2180 return Err(HandleError{err: "Cannot push more than their max accepted HTLCs", action: None});
2182 //TODO: Spec is unclear if this is per-direction or in total (I assume per direction):
2183 // Check their_max_htlc_value_in_flight_msat
2184 if htlc_outbound_value_msat + amount_msat > self.their_max_htlc_value_in_flight_msat {
2185 return Err(HandleError{err: "Cannot send value that would put us over our max HTLC value in flight", action: None});
2187 // Check their_channel_reserve_satoshis:
2188 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 {
2189 return Err(HandleError{err: "Cannot send value that would put us over our reserve value", action: None});
2192 //TODO: Check cltv_expiry? Do this in channel manager?
2194 // Now update local state:
2195 if (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32)) == (ChannelState::AwaitingRemoteRevoke as u32) {
2196 //TODO: Check the limits *including* other pending holding cell HTLCs!
2197 self.holding_cell_htlc_updates.push(HTLCUpdateAwaitingACK::AddHTLC {
2198 amount_msat: amount_msat,
2199 payment_hash: payment_hash,
2200 cltv_expiry: cltv_expiry,
2201 onion_routing_packet: onion_routing_packet,
2202 time_created: Instant::now(),
2207 self.pending_htlcs.push(HTLCOutput {
2209 htlc_id: self.next_local_htlc_id,
2210 amount_msat: amount_msat,
2211 payment_hash: payment_hash.clone(),
2212 cltv_expiry: cltv_expiry,
2213 state: HTLCState::LocalAnnounced,
2215 local_removed_fulfilled: false,
2216 pending_forward_state: None
2219 let res = msgs::UpdateAddHTLC {
2220 channel_id: self.channel_id,
2221 htlc_id: self.next_local_htlc_id,
2222 amount_msat: amount_msat,
2223 payment_hash: payment_hash,
2224 cltv_expiry: cltv_expiry,
2225 onion_routing_packet: onion_routing_packet,
2227 self.next_local_htlc_id += 1;
2232 /// Creates a signed commitment transaction to send to the remote peer.
2233 pub fn send_commitment(&mut self) -> Result<(msgs::CommitmentSigned, ChannelMonitor), HandleError> {
2234 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
2235 return Err(HandleError{err: "Cannot create commitment tx until channel is fully established", action: None});
2237 if (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32)) == (ChannelState::AwaitingRemoteRevoke as u32) {
2238 return Err(HandleError{err: "Cannot create commitment tx until remote revokes their previous commitment", action: None});
2240 let mut have_updates = false; // TODO initialize with "have we sent a fee update?"
2241 for htlc in self.pending_htlcs.iter() {
2242 if htlc.state == HTLCState::LocalAnnounced {
2243 have_updates = true;
2245 if have_updates { break; }
2248 return Err(HandleError{err: "Cannot create commitment tx until we have some updates to send", action: None});
2250 self.send_commitment_no_status_check()
2252 /// Only fails in case of bad keys
2253 fn send_commitment_no_status_check(&mut self) -> Result<(msgs::CommitmentSigned, ChannelMonitor), HandleError> {
2254 let funding_script = self.get_funding_redeemscript();
2256 // We can upgrade the status of some HTLCs that are waiting on a commitment, even if we
2257 // fail to generate this, we still are at least at a position where upgrading their status
2259 for htlc in self.pending_htlcs.iter_mut() {
2260 if htlc.state == HTLCState::AwaitingRemoteRevokeToAnnounce {
2261 htlc.state = HTLCState::AwaitingAnnouncedRemoteRevoke;
2262 } else if htlc.state == HTLCState::AwaitingRemoteRevokeToRemove {
2263 htlc.state = HTLCState::AwaitingRemovedRemoteRevoke;
2267 let remote_keys = self.build_remote_transaction_keys()?;
2268 let remote_commitment_tx = self.build_commitment_transaction(self.cur_remote_commitment_transaction_number, &remote_keys, false, true);
2269 let remote_commitment_txid = remote_commitment_tx.0.txid();
2270 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();
2271 let our_sig = self.secp_ctx.sign(&remote_sighash, &self.local_keys.funding_key).unwrap();
2273 let mut htlc_sigs = Vec::new();
2275 for ref htlc in remote_commitment_tx.1.iter() {
2276 let htlc_tx = self.build_htlc_transaction(&remote_commitment_txid, htlc, false, &remote_keys);
2277 let htlc_redeemscript = chan_utils::get_htlc_redeemscript(&htlc, &remote_keys);
2278 let htlc_sighash = Message::from_slice(&bip143::SighashComponents::new(&htlc_tx).sighash_all(&htlc_tx.input[0], &htlc_redeemscript, htlc.amount_msat / 1000)[..]).unwrap();
2279 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));
2280 htlc_sigs.push(self.secp_ctx.sign(&htlc_sighash, &our_htlc_key).unwrap());
2283 // Update state now that we've passed all the can-fail calls...
2284 self.channel_monitor.provide_latest_remote_commitment_tx_info(&remote_commitment_tx.0, remote_commitment_tx.1, self.cur_remote_commitment_transaction_number);
2285 self.channel_state |= ChannelState::AwaitingRemoteRevoke as u32;
2287 Ok((msgs::CommitmentSigned {
2288 channel_id: self.channel_id,
2290 htlc_signatures: htlc_sigs,
2291 }, self.channel_monitor.clone()))
2294 /// Adds a pending outbound HTLC to this channel, and creates a signed commitment transaction
2295 /// to send to the remote peer in one go.
2296 /// Shorthand for calling send_htlc() followed by send_commitment(), see docs on those for
2298 pub fn send_htlc_and_commit(&mut self, amount_msat: u64, payment_hash: [u8; 32], cltv_expiry: u32, onion_routing_packet: msgs::OnionPacket) -> Result<Option<(msgs::UpdateAddHTLC, msgs::CommitmentSigned, ChannelMonitor)>, HandleError> {
2299 match self.send_htlc(amount_msat, payment_hash, cltv_expiry, onion_routing_packet)? {
2300 Some(update_add_htlc) => {
2301 let (commitment_signed, monitor_update) = self.send_commitment_no_status_check()?;
2302 Ok(Some((update_add_htlc, commitment_signed, monitor_update)))
2308 /// Begins the shutdown process, getting a message for the remote peer and returning all
2309 /// holding cell HTLCs for payment failure.
2310 pub fn get_shutdown(&mut self) -> Result<(msgs::Shutdown, Vec<[u8; 32]>), HandleError> {
2311 for htlc in self.pending_htlcs.iter() {
2312 if htlc.state == HTLCState::LocalAnnounced {
2313 return Err(HandleError{err: "Cannot begin shutdown with pending HTLCs, call send_commitment first", action: None});
2316 if self.channel_state & BOTH_SIDES_SHUTDOWN_MASK != 0 {
2317 return Err(HandleError{err: "Shutdown already in progress", action: None});
2319 assert_eq!(self.channel_state & ChannelState::ShutdownComplete as u32, 0);
2321 let our_closing_script = self.get_closing_scriptpubkey();
2323 // From here on out, we may not fail!
2324 if self.channel_state < ChannelState::FundingSent as u32 {
2325 self.channel_state = ChannelState::ShutdownComplete as u32;
2327 self.channel_state |= ChannelState::LocalShutdownSent as u32;
2329 self.channel_update_count += 1;
2331 // We can't send our shutdown until we've committed all of our pending HTLCs, but the
2332 // remote side is unlikely to accept any new HTLCs, so we go ahead and "free" any holding
2333 // cell HTLCs and return them to fail the payment.
2334 let mut dropped_outbound_htlcs = Vec::with_capacity(self.holding_cell_htlc_updates.len());
2335 self.holding_cell_htlc_updates.retain(|htlc_update| {
2337 &HTLCUpdateAwaitingACK::AddHTLC { ref payment_hash, .. } => {
2338 dropped_outbound_htlcs.push(payment_hash.clone());
2345 Ok((msgs::Shutdown {
2346 channel_id: self.channel_id,
2347 scriptpubkey: our_closing_script,
2348 }, dropped_outbound_htlcs))
2351 /// Gets the latest commitment transaction and any dependant transactions for relay (forcing
2352 /// shutdown of this channel - no more calls into this Channel may be made afterwards except
2353 /// those explicitly stated to be allowed after shutdown completes, eg some simple getters).
2354 /// Also returns the list of payment_hashes for channels which we can safely fail backwards
2355 /// immediately (others we will have to allow to time out).
2356 pub fn force_shutdown(&mut self) -> (Vec<Transaction>, Vec<[u8; 32]>) {
2357 assert!(self.channel_state != ChannelState::ShutdownComplete as u32);
2359 // We go ahead and "free" any holding cell HTLCs or HTLCs we haven't yet committed to and
2360 // return them to fail the payment.
2361 let mut dropped_outbound_htlcs = Vec::with_capacity(self.holding_cell_htlc_updates.len());
2362 for htlc_update in self.holding_cell_htlc_updates.drain(..) {
2364 HTLCUpdateAwaitingACK::AddHTLC { payment_hash, .. } => {
2365 dropped_outbound_htlcs.push(payment_hash);
2371 for htlc in self.pending_htlcs.drain(..) {
2372 if htlc.state == HTLCState::LocalAnnounced {
2373 dropped_outbound_htlcs.push(htlc.payment_hash);
2375 //TODO: Do something with the remaining HTLCs
2376 //(we need to have the ChannelManager monitor them so we can claim the inbound HTLCs
2380 self.channel_state = ChannelState::ShutdownComplete as u32;
2381 self.channel_update_count += 1;
2382 let mut res = Vec::new();
2383 mem::swap(&mut res, &mut self.last_local_commitment_txn);
2384 (res, dropped_outbound_htlcs)
2390 use bitcoin::util::hash::Sha256dHash;
2391 use bitcoin::util::bip143;
2392 use bitcoin::network::serialize::serialize;
2393 use bitcoin::blockdata::script::Script;
2394 use bitcoin::blockdata::transaction::Transaction;
2396 use ln::channel::{Channel,ChannelKeys,HTLCOutput,HTLCState,HTLCOutputInCommitment,TxCreationKeys};
2397 use ln::channel::MAX_FUNDING_SATOSHIS;
2399 use chain::chaininterface::{FeeEstimator,ConfirmationTarget};
2400 use chain::transaction::OutPoint;
2401 use secp256k1::{Secp256k1,Message,Signature};
2402 use secp256k1::key::{SecretKey,PublicKey};
2403 use crypto::sha2::Sha256;
2404 use crypto::digest::Digest;
2406 struct TestFeeEstimator {
2409 impl FeeEstimator for TestFeeEstimator {
2410 fn get_est_sat_per_1000_weight(&self, _: ConfirmationTarget) -> u64 {
2416 fn test_max_funding_satoshis() {
2417 assert!(MAX_FUNDING_SATOSHIS <= 21_000_000 * 100_000_000,
2418 "MAX_FUNDING_SATOSHIS is greater than all satoshis on existence");
2422 fn outbound_commitment_test() {
2423 // Test vectors from BOLT 3 Appendix C:
2424 let feeest = TestFeeEstimator{fee_est: 15000};
2425 let secp_ctx = Secp256k1::new();
2427 let chan_keys = ChannelKeys {
2428 funding_key: SecretKey::from_slice(&secp_ctx, &hex::decode("30ff4956bbdd3222d44cc5e8a1261dab1e07957bdac5ae88fe3261ef321f3749").unwrap()[..]).unwrap(),
2429 payment_base_key: SecretKey::from_slice(&secp_ctx, &hex::decode("1111111111111111111111111111111111111111111111111111111111111111").unwrap()[..]).unwrap(),
2430 delayed_payment_base_key: SecretKey::from_slice(&secp_ctx, &hex::decode("3333333333333333333333333333333333333333333333333333333333333333").unwrap()[..]).unwrap(),
2431 htlc_base_key: SecretKey::from_slice(&secp_ctx, &hex::decode("1111111111111111111111111111111111111111111111111111111111111111").unwrap()[..]).unwrap(),
2433 // These aren't set in the test vectors:
2434 revocation_base_key: SecretKey::from_slice(&secp_ctx, &hex::decode("0fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff").unwrap()[..]).unwrap(),
2435 channel_close_key: SecretKey::from_slice(&secp_ctx, &hex::decode("0fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff").unwrap()[..]).unwrap(),
2436 channel_monitor_claim_key: SecretKey::from_slice(&secp_ctx, &hex::decode("0fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff").unwrap()[..]).unwrap(),
2437 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],
2439 assert_eq!(PublicKey::from_secret_key(&secp_ctx, &chan_keys.funding_key).unwrap().serialize()[..],
2440 hex::decode("023da092f6980e58d2c037173180e9a465476026ee50f96695963e8efe436f54eb").unwrap()[..]);
2442 let mut chan = Channel::new_outbound(&feeest, chan_keys, PublicKey::new(), 10000000, false, 42); // Nothing uses their network key in this test
2443 chan.their_to_self_delay = 144;
2444 chan.our_dust_limit_satoshis = 546;
2446 let funding_info = OutPoint::new(Sha256dHash::from_hex("8984484a580b825b9972d7adb15050b3ab624ccd731946b3eeddb92f4e7ef6be").unwrap(), 0);
2447 chan.channel_monitor.set_funding_info((funding_info, Script::new()));
2449 chan.their_payment_basepoint = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&secp_ctx, &hex::decode("4444444444444444444444444444444444444444444444444444444444444444").unwrap()[..]).unwrap()).unwrap();
2450 assert_eq!(chan.their_payment_basepoint.serialize()[..],
2451 hex::decode("032c0b7cf95324a07d05398b240174dc0c2be444d96b159aa6c7f7b1e668680991").unwrap()[..]);
2453 chan.their_funding_pubkey = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&secp_ctx, &hex::decode("1552dfba4f6cf29a62a0af13c8d6981d36d0ef8d61ba10fb0fe90da7634d7e13").unwrap()[..]).unwrap()).unwrap();
2454 assert_eq!(chan.their_funding_pubkey.serialize()[..],
2455 hex::decode("030e9f7b623d2ccc7c9bd44d66d5ce21ce504c0acf6385a132cec6d3c39fa711c1").unwrap()[..]);
2457 chan.their_htlc_basepoint = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&secp_ctx, &hex::decode("4444444444444444444444444444444444444444444444444444444444444444").unwrap()[..]).unwrap()).unwrap();
2458 assert_eq!(chan.their_htlc_basepoint.serialize()[..],
2459 hex::decode("032c0b7cf95324a07d05398b240174dc0c2be444d96b159aa6c7f7b1e668680991").unwrap()[..]);
2461 chan.their_revocation_basepoint = PublicKey::from_slice(&secp_ctx, &hex::decode("02466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f27").unwrap()[..]).unwrap();
2463 // We can't just use build_local_transaction_keys here as the per_commitment_secret is not
2464 // derived from a commitment_seed, so instead we copy it here and call
2465 // build_commitment_transaction.
2466 let delayed_payment_base = PublicKey::from_secret_key(&secp_ctx, &chan.local_keys.delayed_payment_base_key).unwrap();
2467 let per_commitment_secret = SecretKey::from_slice(&secp_ctx, &hex::decode("1f1e1d1c1b1a191817161514131211100f0e0d0c0b0a09080706050403020100").unwrap()[..]).unwrap();
2468 let per_commitment_point = PublicKey::from_secret_key(&secp_ctx, &per_commitment_secret).unwrap();
2469 let htlc_basepoint = PublicKey::from_secret_key(&secp_ctx, &chan.local_keys.htlc_base_key).unwrap();
2470 let keys = TxCreationKeys::new(&secp_ctx, &per_commitment_point, &delayed_payment_base, &htlc_basepoint, &chan.their_revocation_basepoint, &chan.their_payment_basepoint, &chan.their_htlc_basepoint).unwrap();
2472 let mut unsigned_tx: (Transaction, Vec<HTLCOutputInCommitment>);
2474 macro_rules! test_commitment {
2475 ( $their_sig_hex: expr, $our_sig_hex: expr, $tx_hex: expr) => {
2476 unsigned_tx = chan.build_commitment_transaction(0xffffffffffff - 42, &keys, true, false);
2477 let their_signature = Signature::from_der(&secp_ctx, &hex::decode($their_sig_hex).unwrap()[..]).unwrap();
2478 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();
2479 secp_ctx.verify(&sighash, &their_signature, &chan.their_funding_pubkey).unwrap();
2481 chan.sign_commitment_transaction(&mut unsigned_tx.0, &their_signature);
2483 assert_eq!(serialize(&unsigned_tx.0).unwrap()[..],
2484 hex::decode($tx_hex).unwrap()[..]);
2488 macro_rules! test_htlc_output {
2489 ( $htlc_idx: expr, $their_sig_hex: expr, $our_sig_hex: expr, $tx_hex: expr ) => {
2490 let remote_signature = Signature::from_der(&secp_ctx, &hex::decode($their_sig_hex).unwrap()[..]).unwrap();
2492 let ref htlc = unsigned_tx.1[$htlc_idx];
2493 let mut htlc_tx = chan.build_htlc_transaction(&unsigned_tx.0.txid(), &htlc, true, &keys);
2494 let htlc_redeemscript = chan_utils::get_htlc_redeemscript(&htlc, &keys);
2495 let htlc_sighash = Message::from_slice(&bip143::SighashComponents::new(&htlc_tx).sighash_all(&htlc_tx.input[0], &htlc_redeemscript, htlc.amount_msat / 1000)[..]).unwrap();
2496 secp_ctx.verify(&htlc_sighash, &remote_signature, &keys.b_htlc_key).unwrap();
2498 let mut preimage: Option<[u8; 32]> = None;
2501 let mut sha = Sha256::new();
2502 sha.input(&[i; 32]);
2504 let mut out = [0; 32];
2505 sha.result(&mut out);
2507 if out == htlc.payment_hash {
2508 preimage = Some([i; 32]);
2512 assert!(preimage.is_some());
2515 chan.sign_htlc_transaction(&mut htlc_tx, &remote_signature, &preimage, &htlc, &keys).unwrap();
2516 assert_eq!(serialize(&htlc_tx).unwrap()[..],
2517 hex::decode($tx_hex).unwrap()[..]);
2522 // simple commitment tx with no HTLCs
2523 chan.value_to_self_msat = 7000000000;
2525 test_commitment!("3045022100f51d2e566a70ba740fc5d8c0f07b9b93d2ed741c3c0860c613173de7d39e7968022041376d520e9c0e1ad52248ddf4b22e12be8763007df977253ef45a4ca3bdb7c0",
2526 "3044022051b75c73198c6deee1a875871c3961832909acd297c6b908d59e3319e5185a46022055c419379c5051a78d00dbbce11b5b664a0c22815fbcc6fcef6b1937c3836939",
2527 "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");
2530 chan.pending_htlcs.push({
2531 let mut out = HTLCOutput{
2534 amount_msat: 1000000,
2536 payment_hash: [0; 32],
2537 state: HTLCState::Committed,
2539 local_removed_fulfilled: false,
2540 pending_forward_state: None,
2542 let mut sha = Sha256::new();
2543 sha.input(&hex::decode("0000000000000000000000000000000000000000000000000000000000000000").unwrap());
2544 sha.result(&mut out.payment_hash);
2547 chan.pending_htlcs.push({
2548 let mut out = HTLCOutput{
2551 amount_msat: 2000000,
2553 payment_hash: [0; 32],
2554 state: HTLCState::Committed,
2556 local_removed_fulfilled: false,
2557 pending_forward_state: None,
2559 let mut sha = Sha256::new();
2560 sha.input(&hex::decode("0101010101010101010101010101010101010101010101010101010101010101").unwrap());
2561 sha.result(&mut out.payment_hash);
2564 chan.pending_htlcs.push({
2565 let mut out = HTLCOutput{
2568 amount_msat: 2000000,
2570 payment_hash: [0; 32],
2571 state: HTLCState::Committed,
2573 local_removed_fulfilled: false,
2574 pending_forward_state: None,
2576 let mut sha = Sha256::new();
2577 sha.input(&hex::decode("0202020202020202020202020202020202020202020202020202020202020202").unwrap());
2578 sha.result(&mut out.payment_hash);
2581 chan.pending_htlcs.push({
2582 let mut out = HTLCOutput{
2585 amount_msat: 3000000,
2587 payment_hash: [0; 32],
2588 state: HTLCState::Committed,
2590 local_removed_fulfilled: false,
2591 pending_forward_state: None,
2593 let mut sha = Sha256::new();
2594 sha.input(&hex::decode("0303030303030303030303030303030303030303030303030303030303030303").unwrap());
2595 sha.result(&mut out.payment_hash);
2598 chan.pending_htlcs.push({
2599 let mut out = HTLCOutput{
2602 amount_msat: 4000000,
2604 payment_hash: [0; 32],
2605 state: HTLCState::Committed,
2607 local_removed_fulfilled: false,
2608 pending_forward_state: None,
2610 let mut sha = Sha256::new();
2611 sha.input(&hex::decode("0404040404040404040404040404040404040404040404040404040404040404").unwrap());
2612 sha.result(&mut out.payment_hash);
2617 // commitment tx with all five HTLCs untrimmed (minimum feerate)
2618 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
2619 chan.feerate_per_kw = 0;
2621 test_commitment!("304402204fd4928835db1ccdfc40f5c78ce9bd65249b16348df81f0c44328dcdefc97d630220194d3869c38bc732dd87d13d2958015e2fc16829e74cd4377f84d215c0b70606",
2622 "30440220275b0c325a5e9355650dc30c0eccfbc7efb23987c24b556b9dfdd40effca18d202206caceb2c067836c51f296740c7ae807ffcbfbf1dd3a0d56b6de9a5b247985f06",
2623 "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");
2625 assert_eq!(unsigned_tx.1.len(), 5);
2627 test_htlc_output!(0,
2628 "304402206a6e59f18764a5bf8d4fa45eebc591566689441229c918b480fb2af8cc6a4aeb02205248f273be447684b33e3c8d1d85a8e0ca9fa0bae9ae33f0527ada9c162919a6",
2629 "304402207cb324fa0de88f452ffa9389678127ebcf4cabe1dd848b8e076c1a1962bf34720220116ed922b12311bd602d67e60d2529917f21c5b82f25ff6506c0f87886b4dfd5",
2630 "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");
2632 test_htlc_output!(1,
2633 "3045022100d5275b3619953cb0c3b5aa577f04bc512380e60fa551762ce3d7a1bb7401cff9022037237ab0dac3fe100cde094e82e2bed9ba0ed1bb40154b48e56aa70f259e608b",
2634 "3045022100c89172099507ff50f4c925e6c5150e871fb6e83dd73ff9fbb72f6ce829a9633f02203a63821d9162e99f9be712a68f9e589483994feae2661e4546cd5b6cec007be5",
2635 "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");
2637 test_htlc_output!(2,
2638 "304402201b63ec807771baf4fdff523c644080de17f1da478989308ad13a58b51db91d360220568939d38c9ce295adba15665fa68f51d967e8ed14a007b751540a80b325f202",
2639 "3045022100def389deab09cee69eaa1ec14d9428770e45bcbe9feb46468ecf481371165c2f022015d2e3c46600b2ebba8dcc899768874cc6851fd1ecb3fffd15db1cc3de7e10da",
2640 "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");
2642 test_htlc_output!(3,
2643 "3045022100daee1808f9861b6c3ecd14f7b707eca02dd6bdfc714ba2f33bc8cdba507bb182022026654bf8863af77d74f51f4e0b62d461a019561bb12acb120d3f7195d148a554",
2644 "30440220643aacb19bbb72bd2b635bc3f7375481f5981bace78cdd8319b2988ffcc6704202203d27784ec8ad51ed3bd517a05525a5139bb0b755dd719e0054332d186ac08727",
2645 "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");
2647 test_htlc_output!(4,
2648 "304402207e0410e45454b0978a623f36a10626ef17b27d9ad44e2760f98cfa3efb37924f0220220bd8acd43ecaa916a80bd4f919c495a2c58982ce7c8625153f8596692a801d",
2649 "30440220549e80b4496803cbc4a1d09d46df50109f546d43fbbf86cd90b174b1484acd5402205f12a4f995cb9bded597eabfee195a285986aa6d93ae5bb72507ebc6a4e2349e",
2650 "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");
2654 // commitment tx with seven outputs untrimmed (maximum feerate)
2655 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
2656 chan.feerate_per_kw = 647;
2658 test_commitment!("3045022100a5c01383d3ec646d97e40f44318d49def817fcd61a0ef18008a665b3e151785502203e648efddd5838981ef55ec954be69c4a652d021e6081a100d034de366815e9b",
2659 "304502210094bfd8f5572ac0157ec76a9551b6c5216a4538c07cd13a51af4a54cb26fa14320220768efce8ce6f4a5efac875142ff19237c011343670adf9c7ac69704a120d1163",
2660 "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");
2662 assert_eq!(unsigned_tx.1.len(), 5);
2664 test_htlc_output!(0,
2665 "30440220385a5afe75632f50128cbb029ee95c80156b5b4744beddc729ad339c9ca432c802202ba5f48550cad3379ac75b9b4fedb86a35baa6947f16ba5037fb8b11ab343740",
2666 "304402205999590b8a79fa346e003a68fd40366397119b2b0cdf37b149968d6bc6fbcc4702202b1e1fb5ab7864931caed4e732c359e0fe3d86a548b557be2246efb1708d579a",
2667 "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");
2669 test_htlc_output!(1,
2670 "304402207ceb6678d4db33d2401fdc409959e57c16a6cb97a30261d9c61f29b8c58d34b90220084b4a17b4ca0e86f2d798b3698ca52de5621f2ce86f80bed79afa66874511b0",
2671 "304402207ff03eb0127fc7c6cae49cc29e2a586b98d1e8969cf4a17dfa50b9c2647720b902205e2ecfda2252956c0ca32f175080e75e4e390e433feb1f8ce9f2ba55648a1dac",
2672 "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");
2674 test_htlc_output!(2,
2675 "304402206a401b29a0dff0d18ec903502c13d83e7ec019450113f4a7655a4ce40d1f65ba0220217723a084e727b6ca0cc8b6c69c014a7e4a01fcdcba3e3993f462a3c574d833",
2676 "3045022100d50d067ca625d54e62df533a8f9291736678d0b86c28a61bb2a80cf42e702d6e02202373dde7e00218eacdafb9415fe0e1071beec1857d1af3c6a201a44cbc47c877",
2677 "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");
2679 test_htlc_output!(3,
2680 "30450221009b1c987ba599ee3bde1dbca776b85481d70a78b681a8d84206723e2795c7cac002207aac84ad910f8598c4d1c0ea2e3399cf6627a4e3e90131315bc9f038451ce39d",
2681 "3045022100db9dc65291077a52728c622987e9895b7241d4394d6dcb916d7600a3e8728c22022036ee3ee717ba0bb5c45ee84bc7bbf85c0f90f26ae4e4a25a6b4241afa8a3f1cb",
2682 "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");
2684 test_htlc_output!(4,
2685 "3045022100cc28030b59f0914f45b84caa983b6f8effa900c952310708c2b5b00781117022022027ba2ccdf94d03c6d48b327f183f6e28c8a214d089b9227f94ac4f85315274f0",
2686 "304402202d1a3c0d31200265d2a2def2753ead4959ae20b4083e19553acfffa5dfab60bf022020ede134149504e15b88ab261a066de49848411e15e70f9e6a5462aec2949f8f",
2687 "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");
2691 // commitment tx with six outputs untrimmed (minimum feerate)
2692 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
2693 chan.feerate_per_kw = 648;
2695 test_commitment!("3044022072714e2fbb93cdd1c42eb0828b4f2eff143f717d8f26e79d6ada4f0dcb681bbe02200911be4e5161dd6ebe59ff1c58e1997c4aea804f81db6b698821db6093d7b057",
2696 "3045022100a2270d5950c89ae0841233f6efea9c951898b301b2e89e0adbd2c687b9f32efa02207943d90f95b9610458e7c65a576e149750ff3accaacad004cd85e70b235e27de",
2697 "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");
2699 assert_eq!(unsigned_tx.1.len(), 4);
2701 test_htlc_output!(0,
2702 "3044022062ef2e77591409d60d7817d9bb1e71d3c4a2931d1a6c7c8307422c84f001a251022022dad9726b0ae3fe92bda745a06f2c00f92342a186d84518588cf65f4dfaada8",
2703 "3045022100a4c574f00411dd2f978ca5cdc1b848c311cd7849c087ad2f21a5bce5e8cc5ae90220090ae39a9bce2fb8bc879d7e9f9022df249f41e25e51f1a9bf6447a9eeffc098",
2704 "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");
2706 test_htlc_output!(1,
2707 "3045022100e968cbbb5f402ed389fdc7f6cd2a80ed650bb42c79aeb2a5678444af94f6c78502204b47a1cb24ab5b0b6fe69fe9cfc7dba07b9dd0d8b95f372c1d9435146a88f8d4",
2708 "304402207679cf19790bea76a733d2fa0672bd43ab455687a068f815a3d237581f57139a0220683a1a799e102071c206b207735ca80f627ab83d6616b4bcd017c5d79ef3e7d0",
2709 "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");
2711 test_htlc_output!(2,
2712 "3045022100aa91932e305292cf9969cc23502bbf6cef83a5df39c95ad04a707c4f4fed5c7702207099fc0f3a9bfe1e7683c0e9aa5e76c5432eb20693bf4cb182f04d383dc9c8c2",
2713 "304402200df76fea718745f3c529bac7fd37923e7309ce38b25c0781e4cf514dd9ef8dc802204172295739dbae9fe0474dcee3608e3433b4b2af3a2e6787108b02f894dcdda3",
2714 "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");
2716 test_htlc_output!(3,
2717 "3044022035cac88040a5bba420b1c4257235d5015309113460bc33f2853cd81ca36e632402202fc94fd3e81e9d34a9d01782a0284f3044370d03d60f3fc041e2da088d2de58f",
2718 "304402200daf2eb7afd355b4caf6fb08387b5f031940ea29d1a9f35071288a839c9039e4022067201b562456e7948616c13acb876b386b511599b58ac1d94d127f91c50463a6",
2719 "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");
2723 // commitment tx with six outputs untrimmed (maximum feerate)
2724 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
2725 chan.feerate_per_kw = 2069;
2727 test_commitment!("3044022001d55e488b8b035b2dd29d50b65b530923a416d47f377284145bc8767b1b6a75022019bb53ddfe1cefaf156f924777eaaf8fdca1810695a7d0a247ad2afba8232eb4",
2728 "304402203ca8f31c6a47519f83255dc69f1894d9a6d7476a19f498d31eaf0cd3a85eeb63022026fd92dc752b33905c4c838c528b692a8ad4ced959990b5d5ee2ff940fa90eea",
2729 "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");
2731 assert_eq!(unsigned_tx.1.len(), 4);
2733 test_htlc_output!(0,
2734 "3045022100d1cf354de41c1369336cf85b225ed033f1f8982a01be503668df756a7e668b66022001254144fb4d0eecc61908fccc3388891ba17c5d7a1a8c62bdd307e5a513f992",
2735 "3044022056eb1af429660e45a1b0b66568cb8c4a3aa7e4c9c292d5d6c47f86ebf2c8838f022065c3ac4ebe980ca7a41148569be4ad8751b0a724a41405697ec55035dae66402",
2736 "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");
2738 test_htlc_output!(1,
2739 "3045022100d065569dcb94f090345402736385efeb8ea265131804beac06dd84d15dd2d6880220664feb0b4b2eb985fadb6ec7dc58c9334ea88ce599a9be760554a2d4b3b5d9f4",
2740 "3045022100914bb232cd4b2690ee3d6cb8c3713c4ac9c4fb925323068d8b07f67c8541f8d9022057152f5f1615b793d2d45aac7518989ae4fe970f28b9b5c77504799d25433f7f",
2741 "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");
2743 test_htlc_output!(2,
2744 "3045022100d4e69d363de993684eae7b37853c40722a4c1b4a7b588ad7b5d8a9b5006137a102207a069c628170ee34be5612747051bdcc087466dbaa68d5756ea81c10155aef18",
2745 "304402200e362443f7af830b419771e8e1614fc391db3a4eb799989abfc5ab26d6fcd032022039ab0cad1c14dfbe9446bf847965e56fe016e0cbcf719fd18c1bfbf53ecbd9f9",
2746 "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");
2748 test_htlc_output!(3,
2749 "30450221008ec888e36e4a4b3dc2ed6b823319855b2ae03006ca6ae0d9aa7e24bfc1d6f07102203b0f78885472a67ff4fe5916c0bb669487d659527509516fc3a08e87a2cc0a7c",
2750 "304402202c3e14282b84b02705dfd00a6da396c9fe8a8bcb1d3fdb4b20a4feba09440e8b02202b058b39aa9b0c865b22095edcd9ff1f71bbfe20aa4993755e54d042755ed0d5",
2751 "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");
2755 // commitment tx with five outputs untrimmed (minimum feerate)
2756 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
2757 chan.feerate_per_kw = 2070;
2759 test_commitment!("3045022100f2377f7a67b7fc7f4e2c0c9e3a7de935c32417f5668eda31ea1db401b7dc53030220415fdbc8e91d0f735e70c21952342742e25249b0d062d43efbfc564499f37526",
2760 "30440220443cb07f650aebbba14b8bc8d81e096712590f524c5991ac0ed3bbc8fd3bd0c7022028a635f548e3ca64b19b69b1ea00f05b22752f91daf0b6dab78e62ba52eb7fd0",
2761 "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");
2763 assert_eq!(unsigned_tx.1.len(), 3);
2765 test_htlc_output!(0,
2766 "3045022100eed143b1ee4bed5dc3cde40afa5db3e7354cbf9c44054b5f713f729356f08cf7022077161d171c2bbd9badf3c9934de65a4918de03bbac1450f715275f75b103f891",
2767 "3045022100a0d043ed533e7fb1911e0553d31a8e2f3e6de19dbc035257f29d747c5e02f1f5022030cd38d8e84282175d49c1ebe0470db3ebd59768cf40780a784e248a43904fb8",
2768 "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");
2770 test_htlc_output!(1,
2771 "3044022071e9357619fd8d29a411dc053b326a5224c5d11268070e88ecb981b174747c7a02202b763ae29a9d0732fa8836dd8597439460b50472183f420021b768981b4f7cf6",
2772 "3045022100adb1d679f65f96178b59f23ed37d3b70443118f345224a07ecb043eee2acc157022034d24524fe857144a3bcfff3065a9994d0a6ec5f11c681e49431d573e242612d",
2773 "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");
2775 test_htlc_output!(2,
2776 "3045022100c9458a4d2cbb741705577deb0a890e5cb90ee141be0400d3162e533727c9cb2102206edcf765c5dc5e5f9b976ea8149bf8607b5a0efb30691138e1231302b640d2a4",
2777 "304402200831422aa4e1ee6d55e0b894201770a8f8817a189356f2d70be76633ffa6a6f602200dd1b84a4855dc6727dd46c98daae43dfc70889d1ba7ef0087529a57c06e5e04",
2778 "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");
2782 // commitment tx with five outputs untrimmed (maximum feerate)
2783 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
2784 chan.feerate_per_kw = 2194;
2786 test_commitment!("3045022100d33c4e541aa1d255d41ea9a3b443b3b822ad8f7f86862638aac1f69f8f760577022007e2a18e6931ce3d3a804b1c78eda1de17dbe1fb7a95488c9a4ec86203953348",
2787 "304402203b1b010c109c2ecbe7feb2d259b9c4126bd5dc99ee693c422ec0a5781fe161ba0220571fe4e2c649dea9c7aaf7e49b382962f6a3494963c97d80fef9a430ca3f7061",
2788 "02000000000101bef67e4e2fb9ddeeb3461973cd4c62abb35050b1add772995b820b584a488489000000000038b02b8005d007000000000000220020403d394747cae42e98ff01734ad5c08f82ba123d3d9a620abda88989651e2ab5b80b000000000000220020c20b5d1f8584fd90443e7b7b720136174fa4b9333c261d04dbbd012635c0f419a00f0000000000002200208c48d15160397c9731df9bc3b236656efb6665fbfe92b4a6878e88a499f741c4c0c62d0000000000160014ccf1af2f2aabee14bb40fa3851ab2301de84311040966a00000000002200204adb4e2f00643db396dd120d4e7dc17625f5f2c11a40d857accc862d6b7dd80e040047304402203b1b010c109c2ecbe7feb2d259b9c4126bd5dc99ee693c422ec0a5781fe161ba0220571fe4e2c649dea9c7aaf7e49b382962f6a3494963c97d80fef9a430ca3f706101483045022100d33c4e541aa1d255d41ea9a3b443b3b822ad8f7f86862638aac1f69f8f760577022007e2a18e6931ce3d3a804b1c78eda1de17dbe1fb7a95488c9a4ec8620395334801475221023da092f6980e58d2c037173180e9a465476026ee50f96695963e8efe436f54eb21030e9f7b623d2ccc7c9bd44d66d5ce21ce504c0acf6385a132cec6d3c39fa711c152ae3e195220");
2790 assert_eq!(unsigned_tx.1.len(), 3);
2792 test_htlc_output!(0,
2793 "30450221009ed2f0a67f99e29c3c8cf45c08207b765980697781bb727fe0b1416de0e7622902206052684229bc171419ed290f4b615c943f819c0262414e43c5b91dcf72ddcf44",
2794 "3044022004ad5f04ae69c71b3b141d4db9d0d4c38d84009fb3cfeeae6efdad414487a9a0022042d3fe1388c1ff517d1da7fb4025663d372c14728ed52dc88608363450ff6a2f",
2795 "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");
2797 test_htlc_output!(1,
2798 "30440220155d3b90c67c33a8321996a9be5b82431b0c126613be751d400669da9d5c696702204318448bcd48824439d2c6a70be6e5747446be47ff45977cf41672bdc9b6b12d",
2799 "304402201707050c870c1f77cc3ed58d6d71bf281de239e9eabd8ef0955bad0d7fe38dcc02204d36d80d0019b3a71e646a08fa4a5607761d341ae8be371946ebe437c289c915",
2800 "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");
2802 test_htlc_output!(2,
2803 "3045022100a12a9a473ece548584aabdd051779025a5ed4077c4b7aa376ec7a0b1645e5a48022039490b333f53b5b3e2ddde1d809e492cba2b3e5fc3a436cd3ffb4cd3d500fa5a",
2804 "3045022100ff200bc934ab26ce9a559e998ceb0aee53bc40368e114ab9d3054d9960546e2802202496856ca163ac12c143110b6b3ac9d598df7254f2e17b3b94c3ab5301f4c3b0",
2805 "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");
2809 // commitment tx with four outputs untrimmed (minimum feerate)
2810 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
2811 chan.feerate_per_kw = 2195;
2813 test_commitment!("304402205e2f76d4657fb732c0dfc820a18a7301e368f5799e06b7828007633741bda6df0220458009ae59d0c6246065c419359e05eb2a4b4ef4a1b310cc912db44eb7924298",
2814 "304402203b12d44254244b8ff3bb4129b0920fd45120ab42f553d9976394b099d500c99e02205e95bb7a3164852ef0c48f9e0eaf145218f8e2c41251b231f03cbdc4f29a5429",
2815 "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");
2817 assert_eq!(unsigned_tx.1.len(), 2);
2819 test_htlc_output!(0,
2820 "3045022100a8a78fa1016a5c5c3704f2e8908715a3cef66723fb95f3132ec4d2d05cd84fb4022025ac49287b0861ec21932405f5600cbce94313dbde0e6c5d5af1b3366d8afbfc",
2821 "3045022100be6ae1977fd7b630a53623f3f25c542317ccfc2b971782802a4f1ef538eb22b402207edc4d0408f8f38fd3c7365d1cfc26511b7cd2d4fecd8b005fba3cd5bc704390",
2822 "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");
2824 test_htlc_output!(1,
2825 "3045022100e769cb156aa2f7515d126cef7a69968629620ce82afcaa9e210969de6850df4602200b16b3f3486a229a48aadde520dbee31ae340dbadaffae74fbb56681fef27b92",
2826 "30440220665b9cb4a978c09d1ca8977a534999bc8a49da624d0c5439451dd69cde1a003d022070eae0620f01f3c1bd029cc1488da13fb40fdab76f396ccd335479a11c5276d8",
2827 "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");
2831 // commitment tx with four outputs untrimmed (maximum feerate)
2832 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
2833 chan.feerate_per_kw = 3702;
2835 test_commitment!("3045022100c1a3b0b60ca092ed5080121f26a74a20cec6bdee3f8e47bae973fcdceb3eda5502207d467a9873c939bf3aa758014ae67295fedbca52412633f7e5b2670fc7c381c1",
2836 "304402200e930a43c7951162dc15a2b7344f48091c74c70f7024e7116e900d8bcfba861c022066fa6cbda3929e21daa2e7e16a4b948db7e8919ef978402360d1095ffdaff7b0",
2837 "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");
2839 assert_eq!(unsigned_tx.1.len(), 2);
2841 test_htlc_output!(0,
2842 "3045022100dfb73b4fe961b31a859b2bb1f4f15cabab9265016dd0272323dc6a9e85885c54022059a7b87c02861ee70662907f25ce11597d7b68d3399443a831ae40e777b76bdb",
2843 "304402202765b9c9ece4f127fa5407faf66da4c5ce2719cdbe47cd3175fc7d48b482e43d02205605125925e07bad1e41c618a4b434d72c88a164981c4b8af5eaf4ee9142ec3a",
2844 "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");
2846 test_htlc_output!(1,
2847 "3045022100ea9dc2a7c3c3640334dab733bb4e036e32a3106dc707b24227874fa4f7da746802204d672f7ac0fe765931a8df10b81e53a3242dd32bd9dc9331eb4a596da87954e9",
2848 "30440220048a41c660c4841693de037d00a407810389f4574b3286afb7bc392a438fa3f802200401d71fa87c64fe621b49ac07e3bf85157ac680acb977124da28652cc7f1a5c",
2849 "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");
2853 // commitment tx with three outputs untrimmed (minimum feerate)
2854 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
2855 chan.feerate_per_kw = 3703;
2857 test_commitment!("30450221008b7c191dd46893b67b628e618d2dc8e81169d38bade310181ab77d7c94c6675e02203b4dd131fd7c9deb299560983dcdc485545c98f989f7ae8180c28289f9e6bdb0",
2858 "3044022047305531dd44391dce03ae20f8735005c615eb077a974edb0059ea1a311857d602202e0ed6972fbdd1e8cb542b06e0929bc41b2ddf236e04cb75edd56151f4197506",
2859 "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");
2861 assert_eq!(unsigned_tx.1.len(), 1);
2863 test_htlc_output!(0,
2864 "3044022044f65cf833afdcb9d18795ca93f7230005777662539815b8a601eeb3e57129a902206a4bf3e53392affbba52640627defa8dc8af61c958c9e827b2798ab45828abdd",
2865 "3045022100b94d931a811b32eeb885c28ddcf999ae1981893b21dd1329929543fe87ce793002206370107fdd151c5f2384f9ceb71b3107c69c74c8ed5a28a94a4ab2d27d3b0724",
2866 "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");
2870 // commitment tx with three outputs untrimmed (maximum feerate)
2871 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
2872 chan.feerate_per_kw = 4914;
2874 test_commitment!("304402206d6cb93969d39177a09d5d45b583f34966195b77c7e585cf47ac5cce0c90cefb022031d71ae4e33a4e80df7f981d696fbdee517337806a3c7138b7491e2cbb077a0e",
2875 "304402206a2679efa3c7aaffd2a447fd0df7aba8792858b589750f6a1203f9259173198a022008d52a0e77a99ab533c36206cb15ad7aeb2aa72b93d4b571e728cb5ec2f6fe26",
2876 "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");
2878 assert_eq!(unsigned_tx.1.len(), 1);
2880 test_htlc_output!(0,
2881 "3045022100fcb38506bfa11c02874092a843d0cc0a8613c23b639832564a5f69020cb0f6ba02206508b9e91eaa001425c190c68ee5f887e1ad5b1b314002e74db9dbd9e42dbecf",
2882 "304502210086e76b460ddd3cea10525fba298405d3fe11383e56966a5091811368362f689a02200f72ee75657915e0ede89c28709acd113ede9e1b7be520e3bc5cda425ecd6e68",
2883 "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");
2887 // commitment tx with two outputs untrimmed (minimum feerate)
2888 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
2889 chan.feerate_per_kw = 4915;
2891 test_commitment!("304402200769ba89c7330dfa4feba447b6e322305f12ac7dac70ec6ba997ed7c1b598d0802204fe8d337e7fee781f9b7b1a06e580b22f4f79d740059560191d7db53f8765552",
2892 "3045022100a012691ba6cea2f73fa8bac37750477e66363c6d28813b0bb6da77c8eb3fb0270220365e99c51304b0b1a6ab9ea1c8500db186693e39ec1ad5743ee231b0138384b9",
2893 "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");
2895 assert_eq!(unsigned_tx.1.len(), 0);
2899 // commitment tx with two outputs untrimmed (maximum feerate)
2900 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
2901 chan.feerate_per_kw = 9651180;
2903 test_commitment!("3044022037f83ff00c8e5fb18ae1f918ffc24e54581775a20ff1ae719297ef066c71caa9022039c529cccd89ff6c5ed1db799614533844bd6d101da503761c45c713996e3bbd",
2904 "30440220514f977bf7edc442de8ce43ace9686e5ebdc0f893033f13e40fb46c8b8c6e1f90220188006227d175f5c35da0b092c57bea82537aed89f7778204dc5bacf4f29f2b9",
2905 "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");
2907 assert_eq!(unsigned_tx.1.len(), 0);
2911 // commitment tx with one output untrimmed (minimum feerate)
2912 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
2913 chan.feerate_per_kw = 9651181;
2915 test_commitment!("3044022064901950be922e62cbe3f2ab93de2b99f37cff9fc473e73e394b27f88ef0731d02206d1dfa227527b4df44a07599289e207d6fd9cca60c0365682dcd3deaf739567e",
2916 "3044022031a82b51bd014915fe68928d1abf4b9885353fb896cac10c3fdd88d7f9c7f2e00220716bda819641d2c63e65d3549b6120112e1aeaf1742eed94a471488e79e206b1",
2917 "02000000000101bef67e4e2fb9ddeeb3461973cd4c62abb35050b1add772995b820b584a488489000000000038b02b8001c0c62d0000000000160014ccf1af2f2aabee14bb40fa3851ab2301de8431100400473044022031a82b51bd014915fe68928d1abf4b9885353fb896cac10c3fdd88d7f9c7f2e00220716bda819641d2c63e65d3549b6120112e1aeaf1742eed94a471488e79e206b101473044022064901950be922e62cbe3f2ab93de2b99f37cff9fc473e73e394b27f88ef0731d02206d1dfa227527b4df44a07599289e207d6fd9cca60c0365682dcd3deaf739567e01475221023da092f6980e58d2c037173180e9a465476026ee50f96695963e8efe436f54eb21030e9f7b623d2ccc7c9bd44d66d5ce21ce504c0acf6385a132cec6d3c39fa711c152ae3e195220");
2919 assert_eq!(unsigned_tx.1.len(), 0);
2923 // commitment tx with fee greater than funder amount
2924 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
2925 chan.feerate_per_kw = 9651936;
2927 test_commitment!("3044022064901950be922e62cbe3f2ab93de2b99f37cff9fc473e73e394b27f88ef0731d02206d1dfa227527b4df44a07599289e207d6fd9cca60c0365682dcd3deaf739567e",
2928 "3044022031a82b51bd014915fe68928d1abf4b9885353fb896cac10c3fdd88d7f9c7f2e00220716bda819641d2c63e65d3549b6120112e1aeaf1742eed94a471488e79e206b1",
2929 "02000000000101bef67e4e2fb9ddeeb3461973cd4c62abb35050b1add772995b820b584a488489000000000038b02b8001c0c62d0000000000160014ccf1af2f2aabee14bb40fa3851ab2301de8431100400473044022031a82b51bd014915fe68928d1abf4b9885353fb896cac10c3fdd88d7f9c7f2e00220716bda819641d2c63e65d3549b6120112e1aeaf1742eed94a471488e79e206b101473044022064901950be922e62cbe3f2ab93de2b99f37cff9fc473e73e394b27f88ef0731d02206d1dfa227527b4df44a07599289e207d6fd9cca60c0365682dcd3deaf739567e01475221023da092f6980e58d2c037173180e9a465476026ee50f96695963e8efe436f54eb21030e9f7b623d2ccc7c9bd44d66d5ce21ce504c0acf6385a132cec6d3c39fa711c152ae3e195220");
2931 assert_eq!(unsigned_tx.1.len(), 0);
2936 fn test_per_commitment_secret_gen() {
2937 // Test vectors from BOLT 3 Appendix D:
2939 let mut seed = [0; 32];
2940 seed[0..32].clone_from_slice(&hex::decode("0000000000000000000000000000000000000000000000000000000000000000").unwrap());
2941 assert_eq!(chan_utils::build_commitment_secret(seed, 281474976710655),
2942 hex::decode("02a40c85b6f28da08dfdbe0926c53fab2de6d28c10301f8f7c4073d5e42e3148").unwrap()[..]);
2944 seed[0..32].clone_from_slice(&hex::decode("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF").unwrap());
2945 assert_eq!(chan_utils::build_commitment_secret(seed, 281474976710655),
2946 hex::decode("7cc854b54e3e0dcdb010d7a3fee464a9687be6e8db3be6854c475621e007a5dc").unwrap()[..]);
2948 assert_eq!(chan_utils::build_commitment_secret(seed, 0xaaaaaaaaaaa),
2949 hex::decode("56f4008fb007ca9acf0e15b054d5c9fd12ee06cea347914ddbaed70d1c13a528").unwrap()[..]);
2951 assert_eq!(chan_utils::build_commitment_secret(seed, 0x555555555555),
2952 hex::decode("9015daaeb06dba4ccc05b91b2f73bd54405f2be9f217fbacd3c5ac2e62327d31").unwrap()[..]);
2954 seed[0..32].clone_from_slice(&hex::decode("0101010101010101010101010101010101010101010101010101010101010101").unwrap());
2955 assert_eq!(chan_utils::build_commitment_secret(seed, 1),
2956 hex::decode("915c75942a26bb3a433a8ce2cb0427c29ec6c1775cfc78328b57f6ba7bfeaa9c").unwrap()[..]);
2960 fn test_key_derivation() {
2961 // Test vectors from BOLT 3 Appendix E:
2962 let secp_ctx = Secp256k1::new();
2964 let base_secret = SecretKey::from_slice(&secp_ctx, &hex::decode("000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f").unwrap()[..]).unwrap();
2965 let per_commitment_secret = SecretKey::from_slice(&secp_ctx, &hex::decode("1f1e1d1c1b1a191817161514131211100f0e0d0c0b0a09080706050403020100").unwrap()[..]).unwrap();
2967 let base_point = PublicKey::from_secret_key(&secp_ctx, &base_secret).unwrap();
2968 assert_eq!(base_point.serialize()[..], hex::decode("036d6caac248af96f6afa7f904f550253a0f3ef3f5aa2fe6838a95b216691468e2").unwrap()[..]);
2970 let per_commitment_point = PublicKey::from_secret_key(&secp_ctx, &per_commitment_secret).unwrap();
2971 assert_eq!(per_commitment_point.serialize()[..], hex::decode("025f7117a78150fe2ef97db7cfc83bd57b2e2c0d0dd25eaf467a4a1c2a45ce1486").unwrap()[..]);
2973 assert_eq!(chan_utils::derive_public_key(&secp_ctx, &per_commitment_point, &base_point).unwrap().serialize()[..],
2974 hex::decode("0235f2dbfaa89b57ec7b055afe29849ef7ddfeb1cefdb9ebdc43f5494984db29e5").unwrap()[..]);
2976 assert_eq!(chan_utils::derive_private_key(&secp_ctx, &per_commitment_point, &base_secret).unwrap(),
2977 SecretKey::from_slice(&secp_ctx, &hex::decode("cbced912d3b21bf196a766651e436aff192362621ce317704ea2f75d87e7be0f").unwrap()[..]).unwrap());
2979 assert_eq!(chan_utils::derive_public_revocation_key(&secp_ctx, &per_commitment_point, &base_point).unwrap().serialize()[..],
2980 hex::decode("02916e326636d19c33f13e8c0c3a03dd157f332f3e99c317c141dd865eb01f8ff0").unwrap()[..]);
2982 assert_eq!(chan_utils::derive_private_revocation_key(&secp_ctx, &per_commitment_secret, &base_secret).unwrap(),
2983 SecretKey::from_slice(&secp_ctx, &hex::decode("d09ffff62ddb2297ab000cc85bcb4283fdeb6aa052affbc9dddcf33b61078110").unwrap()[..]).unwrap());