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;
26 use util::logger::{Logger, Record};
29 use std::default::Default;
31 use std::time::Instant;
34 pub struct ChannelKeys {
35 pub funding_key: SecretKey,
36 pub revocation_base_key: SecretKey,
37 pub payment_base_key: SecretKey,
38 pub delayed_payment_base_key: SecretKey,
39 pub htlc_base_key: SecretKey,
40 pub channel_close_key: SecretKey,
41 pub channel_monitor_claim_key: SecretKey,
42 pub commitment_seed: [u8; 32],
46 pub fn new_from_seed(seed: &[u8; 32]) -> Result<ChannelKeys, secp256k1::Error> {
47 let mut prk = [0; 32];
48 hkdf_extract(Sha256::new(), b"rust-lightning key gen salt", seed, &mut prk);
49 let secp_ctx = Secp256k1::without_caps();
51 let mut okm = [0; 32];
52 hkdf_expand(Sha256::new(), &prk, b"rust-lightning funding key info", &mut okm);
53 let funding_key = SecretKey::from_slice(&secp_ctx, &okm)?;
55 hkdf_expand(Sha256::new(), &prk, b"rust-lightning revocation base key info", &mut okm);
56 let revocation_base_key = SecretKey::from_slice(&secp_ctx, &okm)?;
58 hkdf_expand(Sha256::new(), &prk, b"rust-lightning payment base key info", &mut okm);
59 let payment_base_key = SecretKey::from_slice(&secp_ctx, &okm)?;
61 hkdf_expand(Sha256::new(), &prk, b"rust-lightning delayed payment base key info", &mut okm);
62 let delayed_payment_base_key = SecretKey::from_slice(&secp_ctx, &okm)?;
64 hkdf_expand(Sha256::new(), &prk, b"rust-lightning htlc base key info", &mut okm);
65 let htlc_base_key = SecretKey::from_slice(&secp_ctx, &okm)?;
67 hkdf_expand(Sha256::new(), &prk, b"rust-lightning channel close key info", &mut okm);
68 let channel_close_key = SecretKey::from_slice(&secp_ctx, &okm)?;
70 hkdf_expand(Sha256::new(), &prk, b"rust-lightning channel monitor claim key info", &mut okm);
71 let channel_monitor_claim_key = SecretKey::from_slice(&secp_ctx, &okm)?;
73 hkdf_expand(Sha256::new(), &prk, b"rust-lightning local commitment seed info", &mut okm);
76 funding_key: funding_key,
77 revocation_base_key: revocation_base_key,
78 payment_base_key: payment_base_key,
79 delayed_payment_base_key: delayed_payment_base_key,
80 htlc_base_key: htlc_base_key,
81 channel_close_key: channel_close_key,
82 channel_monitor_claim_key: channel_monitor_claim_key,
90 /// Added by remote, to be included in next local commitment tx.
91 /// Implies HTLCOutput::outbound: false
93 /// Included in a received commitment_signed message (implying we've revoke_and_ack'ed it), but
94 /// the remote side hasn't yet revoked their previous state, which we need them to do before we
95 /// accept this HTLC. Implies AwaitingRemoteRevoke.
96 /// We also have not yet included this HTLC in a commitment_signed message, and are waiting on
97 /// a remote revoke_and_ack on a previous state before we can do so.
98 /// Implies HTLCOutput::outbound: false
99 AwaitingRemoteRevokeToAnnounce,
100 /// Included in a received commitment_signed message (implying we've revoke_and_ack'ed it), but
101 /// the remote side hasn't yet revoked their previous state, which we need them to do before we
102 /// accept this HTLC. Implies AwaitingRemoteRevoke.
103 /// We have included this HTLC in our latest commitment_signed and are now just waiting on a
105 /// Implies HTLCOutput::outbound: true
106 AwaitingAnnouncedRemoteRevoke,
107 /// Added by us and included in a commitment_signed (if we were AwaitingRemoteRevoke when we
108 /// created it we would have put it in the holding cell instead). When they next revoke_and_ack
109 /// we will promote to Committed (note that they may not accept it until the next time we
110 /// revoke, but we dont really care about that:
111 /// * they've revoked, so worst case we can announce an old state and get our (option on)
112 /// money back (though we wont), and,
113 /// * we'll send them a revoke when they send a commitment_signed, and since only they're
114 /// allowed to remove it, the "can only be removed once committed on both sides" requirement
115 /// doesn't matter to us and its up to them to enforce it, worst-case they jump ahead but
116 /// we'll never get out of sync).
117 /// Implies HTLCOutput::outbound: true
120 /// Remote removed this (outbound) HTLC. We're waiting on their commitment_signed to finalize
121 /// the change (though they'll need to revoke before we fail the payment).
122 /// Implies HTLCOutput::outbound: true
124 /// Remote removed this and sent a commitment_signed (implying we've revoke_and_ack'ed it), but
125 /// the remote side hasn't yet revoked their previous state, which we need them to do before we
126 /// can do any backwards failing. Implies AwaitingRemoteRevoke.
127 /// We also have not yet removed this HTLC in a commitment_signed message, and are waiting on a
128 /// remote revoke_and_ack on a previous state before we can do so.
129 /// Implies HTLCOutput::outbound: true
130 AwaitingRemoteRevokeToRemove,
131 /// Remote removed this and sent a commitment_signed (implying we've revoke_and_ack'ed it), but
132 /// the remote side hasn't yet revoked their previous state, which we need them to do before we
133 /// can do any backwards failing. Implies AwaitingRemoteRevoke.
134 /// We have removed this HTLC in our latest commitment_signed and are now just waiting on a
135 /// revoke_and_ack to drop completely.
136 /// Implies HTLCOutput::outbound: true
137 AwaitingRemovedRemoteRevoke,
138 /// Removed by us and a new commitment_signed was sent (if we were AwaitingRemoteRevoke when we
139 /// created it we would have put it in the holding cell instead). When they next revoke_and_ack
140 /// we'll promote to LocalRemovedAwaitingCommitment if we fulfilled, otherwise we'll drop at
142 /// Note that we have to keep an eye on the HTLC until we've received a broadcastable
143 /// commitment transaction without it as otherwise we'll have to force-close the channel to
144 /// claim it before the timeout (obviously doesn't apply to revoked HTLCs that we can't claim
146 /// Implies HTLCOutput::outbound: false
148 /// Removed by us, sent a new commitment_signed and got a revoke_and_ack. Just waiting on an
149 /// updated local commitment transaction. Implies local_removed_fulfilled.
150 /// Implies HTLCOutput::outbound: false
151 LocalRemovedAwaitingCommitment,
154 struct HTLCOutput { //TODO: Refactor into Outbound/InboundHTLCOutput (will save memory and fewer panics)
155 outbound: bool, // ie to an HTLC-Timeout transaction
159 payment_hash: [u8; 32],
161 /// If we're in a Remote* removed state, set if they failed, otherwise None
162 fail_reason: Option<HTLCFailReason>,
163 /// If we're in LocalRemoved*, set to true if we fulfilled the HTLC, and can claim money
164 local_removed_fulfilled: bool,
165 /// state pre-committed Remote* implies pending_forward_state, otherwise it must be None
166 pending_forward_state: Option<PendingForwardHTLCInfo>,
170 fn get_in_commitment(&self, offered: bool) -> HTLCOutputInCommitment {
171 HTLCOutputInCommitment {
173 amount_msat: self.amount_msat,
174 cltv_expiry: self.cltv_expiry,
175 payment_hash: self.payment_hash,
176 transaction_output_index: 0
181 /// See AwaitingRemoteRevoke ChannelState for more info
182 enum HTLCUpdateAwaitingACK {
187 payment_hash: [u8; 32],
188 onion_routing_packet: msgs::OnionPacket,
189 time_created: Instant, //TODO: Some kind of timeout thing-a-majig
192 payment_preimage: [u8; 32],
193 payment_hash: [u8; 32], // Only here for effecient duplicate detection
196 payment_hash: [u8; 32],
197 err_packet: msgs::OnionErrorPacket,
202 /// Implies we have (or are prepared to) send our open_channel/accept_channel message
203 OurInitSent = (1 << 0),
204 /// Implies we have received their open_channel/accept_channel message
205 TheirInitSent = (1 << 1),
206 /// We have sent funding_created and are awaiting a funding_signed to advance to FundingSent.
207 /// Note that this is nonsense for an inbound channel as we immediately generate funding_signed
208 /// upon receipt of funding_created, so simply skip this state.
210 /// Set when we have received/sent funding_created and funding_signed and are thus now waiting
211 /// on the funding transaction to confirm. The FundingLocked flags are set to indicate when we
212 /// and our counterparty consider the funding transaction confirmed.
214 /// Flag which can be set on FundingSent to indicate they sent us a funding_locked message.
215 /// Once both TheirFundingLocked and OurFundingLocked are set, state moves on to ChannelFunded.
216 TheirFundingLocked = (1 << 4),
217 /// Flag which can be set on FundingSent to indicate we sent them a funding_locked message.
218 /// Once both TheirFundingLocked and OurFundingLocked are set, state moves on to ChannelFunded.
219 OurFundingLocked = (1 << 5),
221 /// Flag which implies that we have sent a commitment_signed but are awaiting the responding
222 /// revoke_and_ack message. During this time period, we can't generate new commitment_signed
223 /// messages as then we will be unable to determine which HTLCs they included in their
224 /// revoke_and_ack implicit ACK, so instead we have to hold them away temporarily to be sent
226 /// Flag is set on ChannelFunded.
227 AwaitingRemoteRevoke = (1 << 7),
228 /// Flag which is set on ChannelFunded or FundingSent after receiving a shutdown message from
229 /// the remote end. If set, they may not add any new HTLCs to the channel, and we are expected
230 /// to respond with our own shutdown message when possible.
231 RemoteShutdownSent = (1 << 8),
232 /// Flag which is set on ChannelFunded or FundingSent after sending a shutdown message. At this
233 /// point, we may not add any new HTLCs to the channel.
234 /// TODO: Investigate some kind of timeout mechanism by which point the remote end must provide
235 /// us their shutdown.
236 LocalShutdownSent = (1 << 9),
237 /// We've successfully negotiated a closing_signed dance. At this point ChannelManager is about
238 /// to drop us, but we store this anyway.
239 ShutdownComplete = (1 << 10),
241 const BOTH_SIDES_SHUTDOWN_MASK: u32 = (ChannelState::LocalShutdownSent as u32 | ChannelState::RemoteShutdownSent as u32);
243 // TODO: We should refactor this to be an Inbound/OutboundChannel until initial setup handshaking
244 // has been completed, and then turn into a Channel to get compiler-time enforcement of things like
245 // calling channel_id() before we're set up or things like get_outbound_funding_signed on an
250 channel_id: [u8; 32],
252 channel_outbound: bool,
254 announce_publicly: bool,
255 channel_value_satoshis: u64,
257 local_keys: ChannelKeys,
259 // Our commitment numbers start at 2^48-1 and count down, whereas the ones used in transaction
260 // generation start at 0 and count up...this simplifies some parts of implementation at the
261 // cost of others, but should really just be changed.
263 cur_local_commitment_transaction_number: u64,
264 cur_remote_commitment_transaction_number: u64,
265 value_to_self_msat: u64, // Excluding all pending_htlcs, excluding fees
266 pending_htlcs: Vec<HTLCOutput>,
267 holding_cell_htlc_updates: Vec<HTLCUpdateAwaitingACK>,
268 next_local_htlc_id: u64,
269 next_remote_htlc_id: u64,
270 channel_update_count: u32,
274 // Used in ChannelManager's tests to send a revoked transaction
275 pub last_local_commitment_txn: Vec<Transaction>,
277 last_local_commitment_txn: Vec<Transaction>,
279 last_sent_closing_fee: Option<(u64, u64)>, // (feerate, fee)
281 /// The hash of the block in which the funding transaction reached our CONF_TARGET. We use this
282 /// to detect unconfirmation after a serialize-unserialize roudtrip where we may not see a full
283 /// series of block_connected/block_disconnected calls. Obviously this is not a guarantee as we
284 /// could miss the funding_tx_confirmed_in block as well, but it serves as a useful fallback.
285 funding_tx_confirmed_in: Option<Sha256dHash>,
286 short_channel_id: Option<u64>,
287 /// Used to deduplicate block_connected callbacks
288 last_block_connected: Sha256dHash,
289 funding_tx_confirmations: u64,
291 their_dust_limit_satoshis: u64,
292 our_dust_limit_satoshis: u64,
293 their_max_htlc_value_in_flight_msat: u64,
294 //get_our_max_htlc_value_in_flight_msat(): u64,
295 their_channel_reserve_satoshis: u64,
296 //get_our_channel_reserve_satoshis(): u64,
297 their_htlc_minimum_msat: u64,
298 our_htlc_minimum_msat: u64,
299 their_to_self_delay: u16,
300 //implied by BREAKDOWN_TIMEOUT: our_to_self_delay: u16,
301 their_max_accepted_htlcs: u16,
302 //implied by OUR_MAX_HTLCS: our_max_accepted_htlcs: u16,
304 their_funding_pubkey: PublicKey,
305 their_revocation_basepoint: PublicKey,
306 their_payment_basepoint: PublicKey,
307 their_delayed_payment_basepoint: PublicKey,
308 their_htlc_basepoint: PublicKey,
309 their_cur_commitment_point: PublicKey,
311 their_prev_commitment_point: Option<PublicKey>,
312 their_node_id: PublicKey,
314 their_shutdown_scriptpubkey: Option<Script>,
316 channel_monitor: ChannelMonitor,
321 const OUR_MAX_HTLCS: u16 = 5; //TODO
322 const CONF_TARGET: u32 = 12; //TODO: Should be much higher
323 /// Confirmation count threshold at which we close a channel. Ideally we'd keep the channel around
324 /// on ice until the funding transaction gets more confirmations, but the LN protocol doesn't
325 /// really allow for this, so instead we're stuck closing it out at that point.
326 const UNCONF_THRESHOLD: u32 = 6;
327 /// The amount of time we require our counterparty wait to claim their money (ie time between when
328 /// we, or our watchtower, must check for them having broadcast a theft transaction).
329 const BREAKDOWN_TIMEOUT: u16 = 6 * 24 * 7; //TODO?
330 /// The amount of time we're willing to wait to claim money back to us
331 const MAX_LOCAL_BREAKDOWN_TIMEOUT: u16 = 6 * 24 * 14;
332 const COMMITMENT_TX_BASE_WEIGHT: u64 = 724;
333 const COMMITMENT_TX_WEIGHT_PER_HTLC: u64 = 172;
334 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
335 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?)
336 /// Maximmum `funding_satoshis` value, according to the BOLT #2 specification
338 pub const MAX_FUNDING_SATOSHIS: u64 = (1 << 24);
340 macro_rules! secp_call {
341 ( $res: expr, $err: expr ) => {
344 //TODO: make the error a parameter
345 Err(_) => return Err(HandleError{err: $err, action: Some(msgs::ErrorAction::DisconnectPeer{ msg: None })})
350 macro_rules! secp_derived_key {
352 secp_call!($res, "Derived invalid key, peer is maliciously selecting parameters")
356 // Convert constants + channel value to limits:
357 fn get_our_max_htlc_value_in_flight_msat(channel_value_satoshis: u64) -> u64 {
358 channel_value_satoshis * 1000 / 10 //TODO
361 /// Guaranteed to return a value no larger than channel_value_satoshis
362 fn get_our_channel_reserve_satoshis(channel_value_satoshis: u64) -> u64 {
363 cmp::min(channel_value_satoshis, 1000) //TODO
366 fn derive_our_dust_limit_satoshis(at_open_background_feerate: u64) -> u64 {
367 at_open_background_feerate * B_OUTPUT_PLUS_SPENDING_INPUT_WEIGHT / 1000 //TODO
370 fn derive_our_htlc_minimum_msat(_at_open_channel_feerate_per_kw: u64) -> u64 {
376 /// panics if channel_value_satoshis is >= `MAX_FUNDING_SATOSHIS`
377 pub fn new_outbound(fee_estimator: &FeeEstimator, chan_keys: ChannelKeys, their_node_id: PublicKey, channel_value_satoshis: u64, announce_publicly: bool, user_id: u64, logger: Arc<Logger>) -> Channel {
378 if channel_value_satoshis >= MAX_FUNDING_SATOSHIS {
379 panic!("funding value > 2^24");
382 let feerate = fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Normal);
383 let background_feerate = fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Background);
385 let secp_ctx = Secp256k1::new();
386 let our_channel_monitor_claim_key_hash = Hash160::from_data(&PublicKey::from_secret_key(&secp_ctx, &chan_keys.channel_monitor_claim_key).unwrap().serialize());
387 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();
388 let channel_monitor = ChannelMonitor::new(&chan_keys.revocation_base_key,
389 &PublicKey::from_secret_key(&secp_ctx, &chan_keys.delayed_payment_base_key).unwrap(),
390 &chan_keys.htlc_base_key,
391 BREAKDOWN_TIMEOUT, our_channel_monitor_claim_script);
396 channel_id: rng::rand_u832(),
397 channel_state: ChannelState::OurInitSent as u32,
398 channel_outbound: true,
400 announce_publicly: announce_publicly,
401 channel_value_satoshis: channel_value_satoshis,
403 local_keys: chan_keys,
404 cur_local_commitment_transaction_number: (1 << 48) - 1,
405 cur_remote_commitment_transaction_number: (1 << 48) - 1,
406 value_to_self_msat: channel_value_satoshis * 1000, //TODO: give them something on open? Parameterize it?
407 pending_htlcs: Vec::new(),
408 holding_cell_htlc_updates: Vec::new(),
409 next_local_htlc_id: 0,
410 next_remote_htlc_id: 0,
411 channel_update_count: 1,
413 last_local_commitment_txn: Vec::new(),
415 last_sent_closing_fee: None,
417 funding_tx_confirmed_in: None,
418 short_channel_id: None,
419 last_block_connected: Default::default(),
420 funding_tx_confirmations: 0,
422 feerate_per_kw: feerate,
423 their_dust_limit_satoshis: 0,
424 our_dust_limit_satoshis: Channel::derive_our_dust_limit_satoshis(background_feerate),
425 their_max_htlc_value_in_flight_msat: 0,
426 their_channel_reserve_satoshis: 0,
427 their_htlc_minimum_msat: 0,
428 our_htlc_minimum_msat: Channel::derive_our_htlc_minimum_msat(feerate),
429 their_to_self_delay: 0,
430 their_max_accepted_htlcs: 0,
432 their_funding_pubkey: PublicKey::new(),
433 their_revocation_basepoint: PublicKey::new(),
434 their_payment_basepoint: PublicKey::new(),
435 their_delayed_payment_basepoint: PublicKey::new(),
436 their_htlc_basepoint: PublicKey::new(),
437 their_cur_commitment_point: PublicKey::new(),
439 their_prev_commitment_point: None,
440 their_node_id: their_node_id,
442 their_shutdown_scriptpubkey: None,
444 channel_monitor: channel_monitor,
450 fn check_remote_fee(fee_estimator: &FeeEstimator, feerate_per_kw: u32) -> Result<(), HandleError> {
451 if (feerate_per_kw as u64) < fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Background) {
452 return Err(HandleError{err: "Peer's feerate much too low", action: Some(msgs::ErrorAction::DisconnectPeer{ msg: None })});
454 if (feerate_per_kw as u64) > fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::HighPriority) * 2 {
455 return Err(HandleError{err: "Peer's feerate much too high", action: Some(msgs::ErrorAction::DisconnectPeer{ msg: None })});
460 /// Creates a new channel from a remote sides' request for one.
461 /// Assumes chain_hash has already been checked and corresponds with what we expect!
462 /// Generally prefers to take the DisconnectPeer action on failure, as a notice to the sender
463 /// that we're rejecting the new channel.
464 pub fn new_from_req(fee_estimator: &FeeEstimator, chan_keys: ChannelKeys, their_node_id: PublicKey, msg: &msgs::OpenChannel, user_id: u64, require_announce: bool, allow_announce: bool, logger: Arc<Logger>) -> Result<Channel, HandleError> {
465 // Check sanity of message fields:
466 if msg.funding_satoshis >= MAX_FUNDING_SATOSHIS {
467 return Err(HandleError{err: "funding value > 2^24", action: Some(msgs::ErrorAction::DisconnectPeer{ msg: None })});
469 if msg.channel_reserve_satoshis > msg.funding_satoshis {
470 return Err(HandleError{err: "Bogus channel_reserve_satoshis", action: Some(msgs::ErrorAction::DisconnectPeer{ msg: None })});
472 if msg.push_msat > (msg.funding_satoshis - msg.channel_reserve_satoshis) * 1000 {
473 return Err(HandleError{err: "push_msat more than highest possible value", action: Some(msgs::ErrorAction::DisconnectPeer{ msg: None })});
475 if msg.dust_limit_satoshis > msg.funding_satoshis {
476 return Err(HandleError{err: "Peer never wants payout outputs?", action: Some(msgs::ErrorAction::DisconnectPeer{ msg: None })});
478 if msg.htlc_minimum_msat >= (msg.funding_satoshis - msg.channel_reserve_satoshis) * 1000 {
479 return Err(HandleError{err: "Minimum htlc value is full channel value", action: Some(msgs::ErrorAction::DisconnectPeer{ msg: None })});
481 Channel::check_remote_fee(fee_estimator, msg.feerate_per_kw)?;
482 if msg.to_self_delay > MAX_LOCAL_BREAKDOWN_TIMEOUT {
483 return Err(HandleError{err: "They wanted our payments to be delayed by a needlessly long period", action: Some(msgs::ErrorAction::DisconnectPeer{ msg: None })});
485 if msg.max_accepted_htlcs < 1 {
486 return Err(HandleError{err: "0 max_accpted_htlcs makes for a useless channel", action: Some(msgs::ErrorAction::DisconnectPeer{ msg: None })});
488 if (msg.channel_flags & 254) != 0 {
489 return Err(HandleError{err: "unknown channel_flags", action: Some(msgs::ErrorAction::DisconnectPeer{ msg: None })});
492 // Convert things into internal flags and prep our state:
494 let their_announce = if (msg.channel_flags & 1) == 1 { true } else { false };
495 if require_announce && !their_announce {
496 return Err(HandleError{err: "Peer tried to open unannounced channel, but we require public ones", action: Some(msgs::ErrorAction::IgnoreError) });
498 if !allow_announce && their_announce {
499 return Err(HandleError{err: "Peer tried to open announced channel, but we require private ones", action: Some(msgs::ErrorAction::IgnoreError) });
502 let background_feerate = fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Background);
504 let secp_ctx = Secp256k1::new();
505 let our_channel_monitor_claim_key_hash = Hash160::from_data(&PublicKey::from_secret_key(&secp_ctx, &chan_keys.channel_monitor_claim_key).unwrap().serialize());
506 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();
507 let mut channel_monitor = ChannelMonitor::new(&chan_keys.revocation_base_key,
508 &PublicKey::from_secret_key(&secp_ctx, &chan_keys.delayed_payment_base_key).unwrap(),
509 &chan_keys.htlc_base_key,
510 BREAKDOWN_TIMEOUT, our_channel_monitor_claim_script);
511 channel_monitor.set_their_htlc_base_key(&msg.htlc_basepoint);
512 channel_monitor.set_their_to_self_delay(msg.to_self_delay);
514 let mut chan = Channel {
517 channel_id: msg.temporary_channel_id,
518 channel_state: (ChannelState::OurInitSent as u32) | (ChannelState::TheirInitSent as u32),
519 channel_outbound: false,
521 announce_publicly: their_announce,
523 local_keys: chan_keys,
524 cur_local_commitment_transaction_number: (1 << 48) - 1,
525 cur_remote_commitment_transaction_number: (1 << 48) - 1,
526 value_to_self_msat: msg.push_msat,
527 pending_htlcs: Vec::new(),
528 holding_cell_htlc_updates: Vec::new(),
529 next_local_htlc_id: 0,
530 next_remote_htlc_id: 0,
531 channel_update_count: 1,
533 last_local_commitment_txn: Vec::new(),
535 last_sent_closing_fee: None,
537 funding_tx_confirmed_in: None,
538 short_channel_id: None,
539 last_block_connected: Default::default(),
540 funding_tx_confirmations: 0,
542 feerate_per_kw: msg.feerate_per_kw as u64,
543 channel_value_satoshis: msg.funding_satoshis,
544 their_dust_limit_satoshis: msg.dust_limit_satoshis,
545 our_dust_limit_satoshis: Channel::derive_our_dust_limit_satoshis(background_feerate),
546 their_max_htlc_value_in_flight_msat: cmp::min(msg.max_htlc_value_in_flight_msat, msg.funding_satoshis * 1000),
547 their_channel_reserve_satoshis: msg.channel_reserve_satoshis,
548 their_htlc_minimum_msat: msg.htlc_minimum_msat,
549 our_htlc_minimum_msat: Channel::derive_our_htlc_minimum_msat(msg.feerate_per_kw as u64),
550 their_to_self_delay: msg.to_self_delay,
551 their_max_accepted_htlcs: msg.max_accepted_htlcs,
553 their_funding_pubkey: msg.funding_pubkey,
554 their_revocation_basepoint: msg.revocation_basepoint,
555 their_payment_basepoint: msg.payment_basepoint,
556 their_delayed_payment_basepoint: msg.delayed_payment_basepoint,
557 their_htlc_basepoint: msg.htlc_basepoint,
558 their_cur_commitment_point: msg.first_per_commitment_point,
560 their_prev_commitment_point: None,
561 their_node_id: their_node_id,
563 their_shutdown_scriptpubkey: None,
565 channel_monitor: channel_monitor,
570 let obscure_factor = chan.get_commitment_transaction_number_obscure_factor();
571 chan.channel_monitor.set_commitment_obscure_factor(obscure_factor);
576 // Utilities to derive keys:
578 fn build_local_commitment_secret(&self, idx: u64) -> SecretKey {
579 let res = chan_utils::build_commitment_secret(self.local_keys.commitment_seed, idx);
580 SecretKey::from_slice(&self.secp_ctx, &res).unwrap()
583 // Utilities to build transactions:
585 fn get_commitment_transaction_number_obscure_factor(&self) -> u64 {
586 let mut sha = Sha256::new();
587 let our_payment_basepoint = PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.payment_base_key).unwrap();
589 if self.channel_outbound {
590 sha.input(&our_payment_basepoint.serialize());
591 sha.input(&self.their_payment_basepoint.serialize());
593 sha.input(&self.their_payment_basepoint.serialize());
594 sha.input(&our_payment_basepoint.serialize());
596 let mut res = [0; 32];
597 sha.result(&mut res);
599 ((res[26] as u64) << 5*8) |
600 ((res[27] as u64) << 4*8) |
601 ((res[28] as u64) << 3*8) |
602 ((res[29] as u64) << 2*8) |
603 ((res[30] as u64) << 1*8) |
604 ((res[31] as u64) << 0*8)
607 /// Transaction nomenclature is somewhat confusing here as there are many different cases - a
608 /// transaction is referred to as "a's transaction" implying that a will be able to broadcast
609 /// the transaction. Thus, b will generally be sending a signature over such a transaction to
610 /// a, and a can revoke the transaction by providing b the relevant per_commitment_secret. As
611 /// such, a transaction is generally the result of b increasing the amount paid to a (or adding
613 /// @local is used only to convert relevant internal structures which refer to remote vs local
614 /// to decide value of outputs and direction of HTLCs.
615 /// @generated_by_local is used to determine *which* HTLCs to include - noting that the HTLC
616 /// state may indicate that one peer has informed the other that they'd like to add an HTLC but
617 /// have not yet committed it. Such HTLCs will only be included in transactions which are being
618 /// generated by the peer which proposed adding the HTLCs, and thus we need to understand both
619 /// which peer generated this transaction and "to whom" this transaction flows.
621 fn build_commitment_transaction(&self, commitment_number: u64, keys: &TxCreationKeys, local: bool, generated_by_local: bool) -> (Transaction, Vec<HTLCOutputInCommitment>) {
622 let obscured_commitment_transaction_number = self.get_commitment_transaction_number_obscure_factor() ^ (0xffffffffffff - commitment_number);
625 let mut ins: Vec<TxIn> = Vec::new();
627 prev_hash: self.channel_monitor.get_funding_txo().unwrap().txid,
628 prev_index: self.channel_monitor.get_funding_txo().unwrap().index as u32,
629 script_sig: Script::new(),
630 sequence: ((0x80 as u32) << 8*3) | ((obscured_commitment_transaction_number >> 3*8) as u32),
636 let mut txouts: Vec<(TxOut, Option<HTLCOutputInCommitment>)> = Vec::with_capacity(self.pending_htlcs.len() + 2);
638 let dust_limit_satoshis = if local { self.our_dust_limit_satoshis } else { self.their_dust_limit_satoshis };
639 let mut remote_htlc_total_msat = 0;
640 let mut local_htlc_total_msat = 0;
641 let mut value_to_self_msat_offset = 0;
643 for ref htlc in self.pending_htlcs.iter() {
644 let include = match htlc.state {
645 HTLCState::RemoteAnnounced => !generated_by_local,
646 HTLCState::AwaitingRemoteRevokeToAnnounce => !generated_by_local,
647 HTLCState::AwaitingAnnouncedRemoteRevoke => true,
648 HTLCState::LocalAnnounced => generated_by_local,
649 HTLCState::Committed => true,
650 HTLCState::RemoteRemoved => generated_by_local,
651 HTLCState::AwaitingRemoteRevokeToRemove => generated_by_local,
652 HTLCState::AwaitingRemovedRemoteRevoke => false,
653 HTLCState::LocalRemoved => !generated_by_local,
654 HTLCState::LocalRemovedAwaitingCommitment => false,
658 if htlc.outbound == local { // "offered HTLC output"
659 if htlc.amount_msat / 1000 >= dust_limit_satoshis + (self.feerate_per_kw * HTLC_TIMEOUT_TX_WEIGHT / 1000) {
660 let htlc_in_tx = htlc.get_in_commitment(true);
662 script_pubkey: chan_utils::get_htlc_redeemscript(&htlc_in_tx, &keys).to_v0_p2wsh(),
663 value: htlc.amount_msat / 1000
664 }, Some(htlc_in_tx)));
667 if htlc.amount_msat / 1000 >= dust_limit_satoshis + (self.feerate_per_kw * HTLC_SUCCESS_TX_WEIGHT / 1000) {
668 let htlc_in_tx = htlc.get_in_commitment(false);
669 txouts.push((TxOut { // "received HTLC output"
670 script_pubkey: chan_utils::get_htlc_redeemscript(&htlc_in_tx, &keys).to_v0_p2wsh(),
671 value: htlc.amount_msat / 1000
672 }, Some(htlc_in_tx)));
676 local_htlc_total_msat += htlc.amount_msat;
678 remote_htlc_total_msat += htlc.amount_msat;
682 HTLCState::AwaitingRemoteRevokeToRemove|HTLCState::AwaitingRemovedRemoteRevoke => {
683 if htlc.fail_reason.is_none() {
684 value_to_self_msat_offset -= htlc.amount_msat as i64;
687 HTLCState::RemoteRemoved => {
688 if !generated_by_local && htlc.fail_reason.is_none() {
689 value_to_self_msat_offset -= htlc.amount_msat as i64;
692 HTLCState::LocalRemoved => {
693 if generated_by_local && htlc.local_removed_fulfilled {
694 value_to_self_msat_offset += htlc.amount_msat as i64;
697 HTLCState::LocalRemovedAwaitingCommitment => {
698 assert!(htlc.local_removed_fulfilled);
699 value_to_self_msat_offset += htlc.amount_msat as i64;
706 let total_fee: u64 = self.feerate_per_kw * (COMMITMENT_TX_BASE_WEIGHT + (txouts.len() as u64) * COMMITMENT_TX_WEIGHT_PER_HTLC) / 1000;
707 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 };
708 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 };
710 let value_to_a = if local { value_to_self } else { value_to_remote };
711 let value_to_b = if local { value_to_remote } else { value_to_self };
713 if value_to_a >= (dust_limit_satoshis as i64) {
715 script_pubkey: chan_utils::get_revokeable_redeemscript(&keys.revocation_key,
716 if local { self.their_to_self_delay } else { BREAKDOWN_TIMEOUT },
717 &keys.a_delayed_payment_key).to_v0_p2wsh(),
718 value: value_to_a as u64
722 if value_to_b >= (dust_limit_satoshis as i64) {
724 script_pubkey: Builder::new().push_opcode(opcodes::All::OP_PUSHBYTES_0)
725 .push_slice(&Hash160::from_data(&keys.b_payment_key.serialize())[..])
727 value: value_to_b as u64
731 transaction_utils::sort_outputs(&mut txouts);
733 let mut outputs: Vec<TxOut> = Vec::with_capacity(txouts.len());
734 let mut htlcs_used: Vec<HTLCOutputInCommitment> = Vec::with_capacity(txouts.len());
735 for (idx, out) in txouts.drain(..).enumerate() {
737 if let Some(out_htlc) = out.1 {
738 htlcs_used.push(out_htlc);
739 htlcs_used.last_mut().unwrap().transaction_output_index = idx as u32;
745 lock_time: ((0x20 as u32) << 8*3) | ((obscured_commitment_transaction_number & 0xffffffu64) as u32),
752 fn get_closing_scriptpubkey(&self) -> Script {
753 let our_channel_close_key_hash = Hash160::from_data(&PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.channel_close_key).unwrap().serialize());
754 Builder::new().push_opcode(opcodes::All::OP_PUSHBYTES_0).push_slice(&our_channel_close_key_hash[..]).into_script()
758 fn get_closing_transaction_weight(a_scriptpubkey: &Script, b_scriptpubkey: &Script) -> u64 {
759 (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)
763 fn build_closing_transaction(&self, proposed_total_fee_satoshis: u64, skip_remote_output: bool) -> (Transaction, u64) {
765 let mut ins: Vec<TxIn> = Vec::new();
767 prev_hash: self.channel_monitor.get_funding_txo().unwrap().txid,
768 prev_index: self.channel_monitor.get_funding_txo().unwrap().index as u32,
769 script_sig: Script::new(),
770 sequence: 0xffffffff,
776 assert!(self.pending_htlcs.is_empty());
777 let mut txouts: Vec<(TxOut, ())> = Vec::new();
779 let mut total_fee_satoshis = proposed_total_fee_satoshis;
780 let value_to_self: i64 = (self.value_to_self_msat as i64) / 1000 - if self.channel_outbound { total_fee_satoshis as i64 } else { 0 };
781 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 };
783 if value_to_self < 0 {
784 assert!(self.channel_outbound);
785 total_fee_satoshis += (-value_to_self) as u64;
786 } else if value_to_remote < 0 {
787 assert!(!self.channel_outbound);
788 total_fee_satoshis += (-value_to_remote) as u64;
791 if !skip_remote_output && value_to_remote as u64 > self.our_dust_limit_satoshis {
793 script_pubkey: self.their_shutdown_scriptpubkey.clone().unwrap(),
794 value: value_to_remote as u64
798 if value_to_self as u64 > self.our_dust_limit_satoshis {
800 script_pubkey: self.get_closing_scriptpubkey(),
801 value: value_to_self as u64
805 transaction_utils::sort_outputs(&mut txouts);
807 let mut outputs: Vec<TxOut> = Vec::new();
808 for out in txouts.drain(..) {
817 }, total_fee_satoshis)
821 /// Creates a set of keys for build_commitment_transaction to generate a transaction which our
822 /// counterparty will sign (ie DO NOT send signatures over a transaction created by this to
823 /// our counterparty!)
824 /// The result is a transaction which we can revoke ownership of (ie a "local" transaction)
825 /// TODO Some magic rust shit to compile-time check this?
826 fn build_local_transaction_keys(&self, commitment_number: u64) -> Result<TxCreationKeys, HandleError> {
827 let per_commitment_point = PublicKey::from_secret_key(&self.secp_ctx, &self.build_local_commitment_secret(commitment_number)).unwrap();
828 let delayed_payment_base = PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.delayed_payment_base_key).unwrap();
829 let htlc_basepoint = PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.htlc_base_key).unwrap();
831 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)))
835 /// Creates a set of keys for build_commitment_transaction to generate a transaction which we
836 /// will sign and send to our counterparty.
837 fn build_remote_transaction_keys(&self) -> Result<TxCreationKeys, HandleError> {
838 //TODO: Ensure that the payment_key derived here ends up in the library users' wallet as we
839 //may see payments to it!
840 let payment_basepoint = PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.payment_base_key).unwrap();
841 let revocation_basepoint = PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.revocation_base_key).unwrap();
842 let htlc_basepoint = PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.htlc_base_key).unwrap();
844 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)))
847 /// Gets the redeemscript for the funding transaction output (ie the funding transaction output
848 /// pays to get_funding_redeemscript().to_v0_p2wsh()).
849 pub fn get_funding_redeemscript(&self) -> Script {
850 let builder = Builder::new().push_opcode(opcodes::All::OP_PUSHNUM_2);
851 let our_funding_key = PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.funding_key).unwrap().serialize();
852 let their_funding_key = self.their_funding_pubkey.serialize();
853 if our_funding_key[..] < their_funding_key[..] {
854 builder.push_slice(&our_funding_key)
855 .push_slice(&their_funding_key)
857 builder.push_slice(&their_funding_key)
858 .push_slice(&our_funding_key)
859 }.push_opcode(opcodes::All::OP_PUSHNUM_2).push_opcode(opcodes::All::OP_CHECKMULTISIG).into_script()
862 fn sign_commitment_transaction(&self, tx: &mut Transaction, their_sig: &Signature) -> Signature {
863 if tx.input.len() != 1 {
864 panic!("Tried to sign commitment transaction that had input count != 1!");
866 if tx.input[0].witness.len() != 0 {
867 panic!("Tried to re-sign commitment transaction");
870 let funding_redeemscript = self.get_funding_redeemscript();
872 let sighash = Message::from_slice(&bip143::SighashComponents::new(&tx).sighash_all(&tx.input[0], &funding_redeemscript, self.channel_value_satoshis)[..]).unwrap();
873 let our_sig = self.secp_ctx.sign(&sighash, &self.local_keys.funding_key).unwrap();
875 tx.input[0].witness.push(Vec::new()); // First is the multisig dummy
877 let our_funding_key = PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.funding_key).unwrap().serialize();
878 let their_funding_key = self.their_funding_pubkey.serialize();
879 if our_funding_key[..] < their_funding_key[..] {
880 tx.input[0].witness.push(our_sig.serialize_der(&self.secp_ctx).to_vec());
881 tx.input[0].witness.push(their_sig.serialize_der(&self.secp_ctx).to_vec());
883 tx.input[0].witness.push(their_sig.serialize_der(&self.secp_ctx).to_vec());
884 tx.input[0].witness.push(our_sig.serialize_der(&self.secp_ctx).to_vec());
886 tx.input[0].witness[1].push(SigHashType::All as u8);
887 tx.input[0].witness[2].push(SigHashType::All as u8);
889 tx.input[0].witness.push(funding_redeemscript.into_vec());
894 /// Builds the htlc-success or htlc-timeout transaction which spends a given HTLC output
895 /// @local is used only to convert relevant internal structures which refer to remote vs local
896 /// to decide value of outputs and direction of HTLCs.
897 fn build_htlc_transaction(&self, prev_hash: &Sha256dHash, htlc: &HTLCOutputInCommitment, local: bool, keys: &TxCreationKeys) -> Transaction {
898 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)
901 fn create_htlc_tx_signature(&self, tx: &Transaction, htlc: &HTLCOutputInCommitment, keys: &TxCreationKeys) -> Result<(Script, Signature, bool), HandleError> {
902 if tx.input.len() != 1 {
903 panic!("Tried to sign HTLC transaction that had input count != 1!");
906 let htlc_redeemscript = chan_utils::get_htlc_redeemscript(&htlc, &keys);
908 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));
909 let sighash = Message::from_slice(&bip143::SighashComponents::new(&tx).sighash_all(&tx.input[0], &htlc_redeemscript, htlc.amount_msat / 1000)[..]).unwrap();
910 let is_local_tx = PublicKey::from_secret_key(&self.secp_ctx, &our_htlc_key).unwrap() == keys.a_htlc_key;
911 Ok((htlc_redeemscript, self.secp_ctx.sign(&sighash, &our_htlc_key).unwrap(), is_local_tx))
914 /// Signs a transaction created by build_htlc_transaction. If the transaction is an
915 /// HTLC-Success transaction (ie htlc.offered is false), preimate must be set!
916 fn sign_htlc_transaction(&self, tx: &mut Transaction, their_sig: &Signature, preimage: &Option<[u8; 32]>, htlc: &HTLCOutputInCommitment, keys: &TxCreationKeys) -> Result<Signature, HandleError> {
917 if tx.input.len() != 1 {
918 panic!("Tried to sign HTLC transaction that had input count != 1!");
920 if tx.input[0].witness.len() != 0 {
921 panic!("Tried to re-sign HTLC transaction");
924 let (htlc_redeemscript, our_sig, local_tx) = self.create_htlc_tx_signature(tx, htlc, keys)?;
926 tx.input[0].witness.push(Vec::new()); // First is the multisig dummy
928 if local_tx { // b, then a
929 tx.input[0].witness.push(their_sig.serialize_der(&self.secp_ctx).to_vec());
930 tx.input[0].witness.push(our_sig.serialize_der(&self.secp_ctx).to_vec());
932 tx.input[0].witness.push(our_sig.serialize_der(&self.secp_ctx).to_vec());
933 tx.input[0].witness.push(their_sig.serialize_der(&self.secp_ctx).to_vec());
935 tx.input[0].witness[1].push(SigHashType::All as u8);
936 tx.input[0].witness[2].push(SigHashType::All as u8);
939 tx.input[0].witness.push(Vec::new());
941 tx.input[0].witness.push(preimage.unwrap().to_vec());
944 tx.input[0].witness.push(htlc_redeemscript.into_vec());
949 fn get_update_fulfill_htlc(&mut self, payment_preimage_arg: [u8; 32]) -> Result<(Option<msgs::UpdateFulfillHTLC>, Option<ChannelMonitor>), HandleError> {
950 // Either ChannelFunded got set (which means it wont bet unset) or there is no way any
951 // caller thought we could have something claimed (cause we wouldn't have accepted in an
952 // incoming HTLC anyway). If we got to ShutdownComplete, callers aren't allowed to call us,
954 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
955 panic!("Was asked to fulfill an HTLC when channel was not in an operational state");
957 assert_eq!(self.channel_state & ChannelState::ShutdownComplete as u32, 0);
959 let mut sha = Sha256::new();
960 sha.input(&payment_preimage_arg);
961 let mut payment_hash_calc = [0; 32];
962 sha.result(&mut payment_hash_calc);
964 let mut pending_idx = std::usize::MAX;
965 for (idx, htlc) in self.pending_htlcs.iter().enumerate() {
966 if !htlc.outbound && htlc.payment_hash == payment_hash_calc {
967 if pending_idx != std::usize::MAX {
968 panic!("Duplicate HTLC payment_hash, ChannelManager should have prevented this!");
973 if pending_idx == std::usize::MAX {
974 return Err(HandleError{err: "Unable to find a pending HTLC which matched the given payment preimage", action: None});
977 // Now update local state:
979 // We have to put the payment_preimage in the channel_monitor right away here to ensure we
980 // can claim it even if the channel hits the chain before we see their next commitment.
981 self.channel_monitor.provide_payment_preimage(&payment_hash_calc, &payment_preimage_arg);
983 if (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32)) == (ChannelState::AwaitingRemoteRevoke as u32) {
984 for pending_update in self.holding_cell_htlc_updates.iter() {
985 match pending_update {
986 &HTLCUpdateAwaitingACK::ClaimHTLC { ref payment_preimage, .. } => {
987 if payment_preimage_arg == *payment_preimage {
988 return Ok((None, None));
991 &HTLCUpdateAwaitingACK::FailHTLC { ref payment_hash, .. } => {
992 if payment_hash_calc == *payment_hash {
993 return Err(HandleError{err: "Unable to find a pending HTLC which matched the given payment preimage", action: None});
999 self.holding_cell_htlc_updates.push(HTLCUpdateAwaitingACK::ClaimHTLC {
1000 payment_preimage: payment_preimage_arg, payment_hash: payment_hash_calc,
1002 return Ok((None, Some(self.channel_monitor.clone())));
1006 let htlc = &mut self.pending_htlcs[pending_idx];
1007 if htlc.state == HTLCState::Committed {
1008 htlc.state = HTLCState::LocalRemoved;
1009 htlc.local_removed_fulfilled = true;
1010 } else if htlc.state == HTLCState::RemoteAnnounced || htlc.state == HTLCState::AwaitingRemoteRevokeToAnnounce || htlc.state == HTLCState::AwaitingAnnouncedRemoteRevoke {
1011 // Theoretically we can hit this if we get the preimage on an HTLC prior to us
1012 // having forwarded it to anyone. This implies that the sender is busted as someone
1013 // else knows the preimage, but handling this case and implementing the logic to
1014 // take their money would be a lot of (never-tested) code to handle a case that
1015 // hopefully never happens. Instead, we make sure we get the preimage into the
1016 // channel_monitor and pretend we didn't just see the preimage.
1017 return Ok((None, Some(self.channel_monitor.clone())));
1018 } else if htlc.state == HTLCState::LocalRemoved || htlc.state == HTLCState::LocalRemovedAwaitingCommitment {
1019 return Err(HandleError{err: "Unable to find a pending HTLC which matched the given payment preimage", action: None});
1021 panic!("Have an inbound HTLC when not awaiting remote revoke that had a garbage state");
1026 Ok((Some(msgs::UpdateFulfillHTLC {
1027 channel_id: self.channel_id(),
1029 payment_preimage: payment_preimage_arg,
1030 }), Some(self.channel_monitor.clone())))
1033 pub fn get_update_fulfill_htlc_and_commit(&mut self, payment_preimage: [u8; 32]) -> Result<(Option<(msgs::UpdateFulfillHTLC, msgs::CommitmentSigned)>, Option<ChannelMonitor>), HandleError> {
1034 match self.get_update_fulfill_htlc(payment_preimage)? {
1035 (Some(update_fulfill_htlc), _) => {
1036 let (commitment, monitor_update) = self.send_commitment_no_status_check()?;
1037 Ok((Some((update_fulfill_htlc, commitment)), Some(monitor_update)))
1039 (None, Some(channel_monitor)) => Ok((None, Some(channel_monitor))),
1040 (None, None) => Ok((None, None))
1044 pub fn get_update_fail_htlc(&mut self, payment_hash_arg: &[u8; 32], err_packet: msgs::OnionErrorPacket) -> Result<Option<msgs::UpdateFailHTLC>, HandleError> {
1045 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
1046 return Err(HandleError{err: "Was asked to fail an HTLC when channel was not in an operational state", action: None});
1048 assert_eq!(self.channel_state & ChannelState::ShutdownComplete as u32, 0);
1050 // Now update local state:
1051 if (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32)) == (ChannelState::AwaitingRemoteRevoke as u32) {
1052 for pending_update in self.holding_cell_htlc_updates.iter() {
1053 match pending_update {
1054 &HTLCUpdateAwaitingACK::ClaimHTLC { ref payment_hash, .. } => {
1055 if *payment_hash_arg == *payment_hash {
1056 return Err(HandleError{err: "Unable to find a pending HTLC which matched the given payment preimage", action: None});
1059 &HTLCUpdateAwaitingACK::FailHTLC { ref payment_hash, .. } => {
1060 if *payment_hash_arg == *payment_hash {
1067 self.holding_cell_htlc_updates.push(HTLCUpdateAwaitingACK::FailHTLC {
1068 payment_hash: payment_hash_arg.clone(),
1074 let mut htlc_id = 0;
1075 let mut htlc_amount_msat = 0;
1076 for htlc in self.pending_htlcs.iter_mut() {
1077 if !htlc.outbound && htlc.payment_hash == *payment_hash_arg {
1079 panic!("Duplicate HTLC payment_hash, you probably re-used payment preimages, NEVER DO THIS!");
1081 htlc_id = htlc.htlc_id;
1082 htlc_amount_msat += htlc.amount_msat;
1083 if htlc.state == HTLCState::Committed {
1084 htlc.state = HTLCState::LocalRemoved;
1085 } else if htlc.state == HTLCState::RemoteAnnounced {
1086 panic!("Somehow forwarded HTLC prior to remote revocation!");
1087 } else if htlc.state == HTLCState::LocalRemoved || htlc.state == HTLCState::LocalRemovedAwaitingCommitment {
1088 return Err(HandleError{err: "Unable to find a pending HTLC which matched the given payment preimage", action: None});
1090 panic!("Have an inbound HTLC when not awaiting remote revoke that had a garbage state");
1094 if htlc_amount_msat == 0 {
1095 return Err(HandleError{err: "Unable to find a pending HTLC which matched the given payment preimage", action: None});
1098 Ok(Some(msgs::UpdateFailHTLC {
1099 channel_id: self.channel_id(),
1105 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> {
1106 match self.get_update_fail_htlc(payment_hash, err_packet)? {
1107 Some(update_fail_htlc) => {
1108 let (commitment, monitor_update) = self.send_commitment_no_status_check()?;
1109 Ok(Some((update_fail_htlc, commitment, monitor_update)))
1115 // Message handlers:
1117 pub fn accept_channel(&mut self, msg: &msgs::AcceptChannel) -> Result<(), HandleError> {
1118 // Check sanity of message fields:
1119 if !self.channel_outbound {
1120 return Err(HandleError{err: "Got an accept_channel message from an inbound peer", action: None});
1122 if self.channel_state != ChannelState::OurInitSent as u32 {
1123 return Err(HandleError{err: "Got an accept_channel message at a strange time", action: None});
1125 if msg.dust_limit_satoshis > 21000000 * 100000000 {
1126 return Err(HandleError{err: "Peer never wants payout outputs?", action: None});
1128 if msg.channel_reserve_satoshis > self.channel_value_satoshis {
1129 return Err(HandleError{err: "Bogus channel_reserve_satoshis", action: None});
1131 if msg.htlc_minimum_msat >= (self.channel_value_satoshis - msg.channel_reserve_satoshis) * 1000 {
1132 return Err(HandleError{err: "Minimum htlc value is full channel value", action: None});
1134 //TODO do something with minimum_depth
1135 if msg.to_self_delay > MAX_LOCAL_BREAKDOWN_TIMEOUT {
1136 return Err(HandleError{err: "They wanted our payments to be delayed by a needlessly long period", action: None});
1138 if msg.max_accepted_htlcs < 1 {
1139 return Err(HandleError{err: "0 max_accpted_htlcs makes for a useless channel", action: None});
1142 self.channel_monitor.set_their_htlc_base_key(&msg.htlc_basepoint);
1144 self.their_dust_limit_satoshis = msg.dust_limit_satoshis;
1145 self.their_max_htlc_value_in_flight_msat = cmp::min(msg.max_htlc_value_in_flight_msat, self.channel_value_satoshis * 1000);
1146 self.their_channel_reserve_satoshis = msg.channel_reserve_satoshis;
1147 self.their_htlc_minimum_msat = msg.htlc_minimum_msat;
1148 self.their_to_self_delay = msg.to_self_delay;
1149 self.their_max_accepted_htlcs = msg.max_accepted_htlcs;
1150 self.their_funding_pubkey = msg.funding_pubkey;
1151 self.their_revocation_basepoint = msg.revocation_basepoint;
1152 self.their_payment_basepoint = msg.payment_basepoint;
1153 self.their_delayed_payment_basepoint = msg.delayed_payment_basepoint;
1154 self.their_htlc_basepoint = msg.htlc_basepoint;
1155 self.their_cur_commitment_point = msg.first_per_commitment_point;
1157 let obscure_factor = self.get_commitment_transaction_number_obscure_factor();
1158 self.channel_monitor.set_commitment_obscure_factor(obscure_factor);
1159 self.channel_monitor.set_their_to_self_delay(msg.to_self_delay);
1161 self.channel_state = ChannelState::OurInitSent as u32 | ChannelState::TheirInitSent as u32;
1166 fn funding_created_signature(&mut self, sig: &Signature) -> Result<(Transaction, Signature), HandleError> {
1167 let funding_script = self.get_funding_redeemscript();
1169 let remote_keys = self.build_remote_transaction_keys()?;
1170 let remote_initial_commitment_tx = self.build_commitment_transaction(self.cur_remote_commitment_transaction_number, &remote_keys, false, false).0;
1171 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();
1173 let local_keys = self.build_local_transaction_keys(self.cur_local_commitment_transaction_number)?;
1174 let local_initial_commitment_tx = self.build_commitment_transaction(self.cur_local_commitment_transaction_number, &local_keys, true, false).0;
1175 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();
1177 // They sign the "local" commitment transaction, allowing us to broadcast the tx if we wish.
1178 secp_call!(self.secp_ctx.verify(&local_sighash, &sig, &self.their_funding_pubkey), "Invalid funding_created signature from peer");
1180 // We sign the "remote" commitment transaction, allowing them to broadcast the tx if they wish.
1181 Ok((remote_initial_commitment_tx, self.secp_ctx.sign(&remote_sighash, &self.local_keys.funding_key).unwrap()))
1184 pub fn funding_created(&mut self, msg: &msgs::FundingCreated) -> Result<(msgs::FundingSigned, ChannelMonitor), HandleError> {
1185 if self.channel_outbound {
1186 return Err(HandleError{err: "Received funding_created for an outbound channel?", action: None});
1188 if self.channel_state != (ChannelState::OurInitSent as u32 | ChannelState::TheirInitSent as u32) {
1189 return Err(HandleError{err: "Received funding_created after we got the channel!", action: None});
1191 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 {
1192 panic!("Should not have advanced channel commitment tx numbers prior to funding_created");
1195 let funding_txo = OutPoint::new(msg.funding_txid, msg.funding_output_index);
1196 let funding_txo_script = self.get_funding_redeemscript().to_v0_p2wsh();
1197 self.channel_monitor.set_funding_info((funding_txo, funding_txo_script));
1199 let (remote_initial_commitment_tx, our_signature) = match self.funding_created_signature(&msg.signature) {
1202 self.channel_monitor.unset_funding_info();
1207 // Now that we're past error-generating stuff, update our local state:
1209 self.channel_monitor.provide_latest_remote_commitment_tx_info(&remote_initial_commitment_tx, Vec::new(), self.cur_remote_commitment_transaction_number);
1210 self.channel_state = ChannelState::FundingSent as u32;
1211 self.channel_id = funding_txo.to_channel_id();
1212 self.cur_remote_commitment_transaction_number -= 1;
1213 self.cur_local_commitment_transaction_number -= 1;
1215 Ok((msgs::FundingSigned {
1216 channel_id: self.channel_id,
1217 signature: our_signature
1218 }, self.channel_monitor.clone()))
1221 /// Handles a funding_signed message from the remote end.
1222 /// If this call is successful, broadcast the funding transaction (and not before!)
1223 pub fn funding_signed(&mut self, msg: &msgs::FundingSigned) -> Result<ChannelMonitor, HandleError> {
1224 if !self.channel_outbound {
1225 return Err(HandleError{err: "Received funding_signed for an inbound channel?", action: None});
1227 if self.channel_state != ChannelState::FundingCreated as u32 {
1228 return Err(HandleError{err: "Received funding_signed in strange state!", action: None});
1230 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 {
1231 panic!("Should not have advanced channel commitment tx numbers prior to funding_created");
1234 let funding_script = self.get_funding_redeemscript();
1236 let local_keys = self.build_local_transaction_keys(self.cur_local_commitment_transaction_number)?;
1237 let mut local_initial_commitment_tx = self.build_commitment_transaction(self.cur_local_commitment_transaction_number, &local_keys, true, false).0;
1238 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();
1240 // They sign the "local" commitment transaction, allowing us to broadcast the tx if we wish.
1241 secp_call!(self.secp_ctx.verify(&local_sighash, &msg.signature, &self.their_funding_pubkey), "Invalid funding_signed signature from peer");
1243 self.sign_commitment_transaction(&mut local_initial_commitment_tx, &msg.signature);
1244 self.channel_monitor.provide_latest_local_commitment_tx_info(local_initial_commitment_tx.clone(), local_keys, self.feerate_per_kw, Vec::new());
1245 self.last_local_commitment_txn = vec![local_initial_commitment_tx];
1246 self.channel_state = ChannelState::FundingSent as u32;
1247 self.cur_local_commitment_transaction_number -= 1;
1249 Ok(self.channel_monitor.clone())
1252 pub fn funding_locked(&mut self, msg: &msgs::FundingLocked) -> Result<(), HandleError> {
1253 let non_shutdown_state = self.channel_state & (!BOTH_SIDES_SHUTDOWN_MASK);
1254 if non_shutdown_state == ChannelState::FundingSent as u32 {
1255 self.channel_state |= ChannelState::TheirFundingLocked as u32;
1256 } else if non_shutdown_state == (ChannelState::FundingSent as u32 | ChannelState::OurFundingLocked as u32) {
1257 self.channel_state = ChannelState::ChannelFunded as u32 | (self.channel_state & BOTH_SIDES_SHUTDOWN_MASK);
1258 self.channel_update_count += 1;
1260 return Err(HandleError{err: "Peer sent a funding_locked at a strange time", action: None});
1263 self.their_prev_commitment_point = Some(self.their_cur_commitment_point);
1264 self.their_cur_commitment_point = msg.next_per_commitment_point;
1268 /// Returns (inbound_htlc_count, outbound_htlc_count, htlc_outbound_value_msat, htlc_inbound_value_msat)
1269 /// If its for a remote update check, we need to be more lax about checking against messages we
1270 /// sent but they may not have received/processed before they sent this message. Further, for
1271 /// our own sends, we're more conservative and even consider things they've removed against
1272 /// totals, though there is little reason to outside of further avoiding any race condition
1274 fn get_pending_htlc_stats(&self, for_remote_update_check: bool) -> (u32, u32, u64, u64) {
1275 let mut inbound_htlc_count: u32 = 0;
1276 let mut outbound_htlc_count: u32 = 0;
1277 let mut htlc_outbound_value_msat = 0;
1278 let mut htlc_inbound_value_msat = 0;
1279 for ref htlc in self.pending_htlcs.iter() {
1281 HTLCState::RemoteAnnounced => {},
1282 HTLCState::AwaitingRemoteRevokeToAnnounce => {},
1283 HTLCState::AwaitingAnnouncedRemoteRevoke => {},
1284 HTLCState::LocalAnnounced => { if for_remote_update_check { continue; } },
1285 HTLCState::Committed => {},
1286 HTLCState::RemoteRemoved => { if for_remote_update_check { continue; } },
1287 HTLCState::AwaitingRemoteRevokeToRemove => { if for_remote_update_check { continue; } },
1288 HTLCState::AwaitingRemovedRemoteRevoke => { if for_remote_update_check { continue; } },
1289 HTLCState::LocalRemoved => {},
1290 HTLCState::LocalRemovedAwaitingCommitment => { if for_remote_update_check { continue; } },
1293 inbound_htlc_count += 1;
1294 htlc_inbound_value_msat += htlc.amount_msat;
1296 outbound_htlc_count += 1;
1297 htlc_outbound_value_msat += htlc.amount_msat;
1300 (inbound_htlc_count, outbound_htlc_count, htlc_outbound_value_msat, htlc_inbound_value_msat)
1303 pub fn update_add_htlc(&mut self, msg: &msgs::UpdateAddHTLC, pending_forward_state: PendingForwardHTLCInfo) -> Result<(), HandleError> {
1304 if (self.channel_state & (ChannelState::ChannelFunded as u32 | ChannelState::RemoteShutdownSent as u32)) != (ChannelState::ChannelFunded as u32) {
1305 return Err(HandleError{err: "Got add HTLC message when channel was not in an operational state", action: None});
1307 if msg.amount_msat > self.channel_value_satoshis * 1000 {
1308 return Err(HandleError{err: "Remote side tried to send more than the total value of the channel", action: None});
1310 if msg.amount_msat < self.our_htlc_minimum_msat {
1311 return Err(HandleError{err: "Remote side tried to send less than our minimum HTLC value", action: None});
1314 let (inbound_htlc_count, _, htlc_outbound_value_msat, htlc_inbound_value_msat) = self.get_pending_htlc_stats(true);
1315 if inbound_htlc_count + 1 > OUR_MAX_HTLCS as u32 {
1316 return Err(HandleError{err: "Remote tried to push more than our max accepted HTLCs", action: None});
1318 //TODO: Spec is unclear if this is per-direction or in total (I assume per direction):
1319 // Check our_max_htlc_value_in_flight_msat
1320 if htlc_inbound_value_msat + msg.amount_msat > Channel::get_our_max_htlc_value_in_flight_msat(self.channel_value_satoshis) {
1321 return Err(HandleError{err: "Remote HTLC add would put them over their max HTLC value in flight", action: None});
1323 // Check our_channel_reserve_satoshis (we're getting paid, so they have to at least meet
1324 // the reserve_satoshis we told them to always have as direct payment so that they lose
1325 // something if we punish them for broadcasting an old state).
1326 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 {
1327 return Err(HandleError{err: "Remote HTLC add would put them over their reserve value", action: None});
1329 if self.next_remote_htlc_id != msg.htlc_id {
1330 return Err(HandleError{err: "Remote skipped HTLC ID", action: None});
1332 if msg.cltv_expiry >= 500000000 {
1333 return Err(HandleError{err: "Remote provided CLTV expiry in seconds instead of block height", action: None});
1336 //TODO: Check msg.cltv_expiry further? Do this in channel manager?
1338 // Now update local state:
1339 self.next_remote_htlc_id += 1;
1340 self.pending_htlcs.push(HTLCOutput {
1342 htlc_id: msg.htlc_id,
1343 amount_msat: msg.amount_msat,
1344 payment_hash: msg.payment_hash,
1345 cltv_expiry: msg.cltv_expiry,
1346 state: HTLCState::RemoteAnnounced,
1348 local_removed_fulfilled: false,
1349 pending_forward_state: Some(pending_forward_state),
1355 /// Removes an outbound HTLC which has been commitment_signed by the remote end
1357 fn mark_outbound_htlc_removed(&mut self, htlc_id: u64, check_preimage: Option<[u8; 32]>, fail_reason: Option<HTLCFailReason>) -> Result<[u8; 32], HandleError> {
1358 for htlc in self.pending_htlcs.iter_mut() {
1359 if htlc.outbound && htlc.htlc_id == htlc_id {
1360 match check_preimage {
1362 Some(payment_hash) =>
1363 if payment_hash != htlc.payment_hash {
1364 return Err(HandleError{err: "Remote tried to fulfill HTLC with an incorrect preimage", action: None});
1367 if htlc.state == HTLCState::LocalAnnounced {
1368 return Err(HandleError{err: "Remote tried to fulfill HTLC before it had been committed", action: None});
1369 } else if htlc.state == HTLCState::Committed {
1370 htlc.state = HTLCState::RemoteRemoved;
1371 htlc.fail_reason = fail_reason;
1372 } else if htlc.state == HTLCState::AwaitingRemoteRevokeToRemove || htlc.state == HTLCState::AwaitingRemovedRemoteRevoke || htlc.state == HTLCState::RemoteRemoved {
1373 return Err(HandleError{err: "Remote tried to fulfill HTLC that they'd already fulfilled", action: None});
1375 panic!("Got a non-outbound state on an outbound HTLC");
1377 return Ok(htlc.payment_hash.clone());
1380 Err(HandleError{err: "Remote tried to fulfill/fail an HTLC we couldn't find", action: None})
1383 pub fn update_fulfill_htlc(&mut self, msg: &msgs::UpdateFulfillHTLC) -> Result<(), HandleError> {
1384 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
1385 return Err(HandleError{err: "Got add HTLC message when channel was not in an operational state", action: None});
1388 let mut sha = Sha256::new();
1389 sha.input(&msg.payment_preimage);
1390 let mut payment_hash = [0; 32];
1391 sha.result(&mut payment_hash);
1393 self.mark_outbound_htlc_removed(msg.htlc_id, Some(payment_hash), None)?;
1397 pub fn update_fail_htlc(&mut self, msg: &msgs::UpdateFailHTLC, fail_reason: HTLCFailReason) -> Result<[u8; 32], HandleError> {
1398 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
1399 return Err(HandleError{err: "Got add HTLC message when channel was not in an operational state", action: None});
1402 self.mark_outbound_htlc_removed(msg.htlc_id, None, Some(fail_reason))
1405 pub fn update_fail_malformed_htlc(&mut self, msg: &msgs::UpdateFailMalformedHTLC, fail_reason: HTLCFailReason) -> Result<(), HandleError> {
1406 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
1407 return Err(HandleError{err: "Got add HTLC message when channel was not in an operational state", action: None});
1410 self.mark_outbound_htlc_removed(msg.htlc_id, None, Some(fail_reason))?;
1414 pub fn commitment_signed(&mut self, msg: &msgs::CommitmentSigned) -> Result<(msgs::RevokeAndACK, Option<msgs::CommitmentSigned>, ChannelMonitor), HandleError> {
1415 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
1416 return Err(HandleError{err: "Got commitment signed message when channel was not in an operational state", action: None});
1419 let funding_script = self.get_funding_redeemscript();
1421 let local_keys = self.build_local_transaction_keys(self.cur_local_commitment_transaction_number)?;
1422 let mut local_commitment_tx = self.build_commitment_transaction(self.cur_local_commitment_transaction_number, &local_keys, true, false);
1423 let local_commitment_txid = local_commitment_tx.0.txid();
1424 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();
1425 secp_call!(self.secp_ctx.verify(&local_sighash, &msg.signature, &self.their_funding_pubkey), "Invalid commitment tx signature from peer");
1427 if msg.htlc_signatures.len() != local_commitment_tx.1.len() {
1428 return Err(HandleError{err: "Got wrong number of HTLC signatures from remote", action: None});
1431 let mut new_local_commitment_txn = Vec::with_capacity(local_commitment_tx.1.len() + 1);
1432 self.sign_commitment_transaction(&mut local_commitment_tx.0, &msg.signature);
1433 new_local_commitment_txn.push(local_commitment_tx.0.clone());
1435 let mut htlcs_and_sigs = Vec::with_capacity(local_commitment_tx.1.len());
1436 for (idx, ref htlc) in local_commitment_tx.1.iter().enumerate() {
1437 let mut htlc_tx = self.build_htlc_transaction(&local_commitment_txid, htlc, true, &local_keys);
1438 let htlc_redeemscript = chan_utils::get_htlc_redeemscript(&htlc, &local_keys);
1439 let htlc_sighash = Message::from_slice(&bip143::SighashComponents::new(&htlc_tx).sighash_all(&htlc_tx.input[0], &htlc_redeemscript, htlc.amount_msat / 1000)[..]).unwrap();
1440 secp_call!(self.secp_ctx.verify(&htlc_sighash, &msg.htlc_signatures[idx], &local_keys.b_htlc_key), "Invalid HTLC tx siganture from peer");
1441 let htlc_sig = if htlc.offered {
1442 let htlc_sig = self.sign_htlc_transaction(&mut htlc_tx, &msg.htlc_signatures[idx], &None, htlc, &local_keys)?;
1443 new_local_commitment_txn.push(htlc_tx);
1446 self.create_htlc_tx_signature(&htlc_tx, htlc, &local_keys)?.1
1448 htlcs_and_sigs.push(((*htlc).clone(), msg.htlc_signatures[idx], htlc_sig));
1451 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();
1452 let per_commitment_secret = chan_utils::build_commitment_secret(self.local_keys.commitment_seed, self.cur_local_commitment_transaction_number + 1);
1454 // Update state now that we've passed all the can-fail calls...
1455 self.channel_monitor.provide_latest_local_commitment_tx_info(local_commitment_tx.0, local_keys, self.feerate_per_kw, htlcs_and_sigs);
1457 let mut need_our_commitment = false;
1458 for htlc in self.pending_htlcs.iter_mut() {
1459 if htlc.state == HTLCState::RemoteAnnounced {
1460 htlc.state = HTLCState::AwaitingRemoteRevokeToAnnounce;
1461 need_our_commitment = true;
1462 } else if htlc.state == HTLCState::RemoteRemoved {
1463 htlc.state = HTLCState::AwaitingRemoteRevokeToRemove;
1464 need_our_commitment = true;
1467 // Finally delete all the LocalRemovedAwaitingCommitment HTLCs
1468 // We really shouldnt have two passes here, but retain gives a non-mutable ref (Rust bug)
1469 let mut claimed_value_msat = 0;
1470 self.pending_htlcs.retain(|htlc| {
1471 if htlc.state == HTLCState::LocalRemovedAwaitingCommitment {
1472 claimed_value_msat += htlc.amount_msat;
1476 self.value_to_self_msat += claimed_value_msat;
1478 self.cur_local_commitment_transaction_number -= 1;
1479 self.last_local_commitment_txn = new_local_commitment_txn;
1481 let (our_commitment_signed, monitor_update) = if need_our_commitment && (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32)) == 0 {
1482 // If we're AwaitingRemoteRevoke we can't send a new commitment here, but that's ok -
1483 // we'll send one right away when we get the revoke_and_ack when we
1484 // free_holding_cell_htlcs().
1485 let (msg, monitor) = self.send_commitment_no_status_check()?;
1486 (Some(msg), monitor)
1487 } else { (None, self.channel_monitor.clone()) };
1489 Ok((msgs::RevokeAndACK {
1490 channel_id: self.channel_id,
1491 per_commitment_secret: per_commitment_secret,
1492 next_per_commitment_point: next_per_commitment_point,
1493 }, our_commitment_signed, monitor_update))
1496 /// Used to fulfill holding_cell_htlcs when we get a remote ack (or implicitly get it by them
1497 /// fulfilling or failing the last pending HTLC)
1498 fn free_holding_cell_htlcs(&mut self) -> Result<Option<(msgs::CommitmentUpdate, ChannelMonitor)>, HandleError> {
1499 if self.holding_cell_htlc_updates.len() != 0 {
1500 let mut htlc_updates = Vec::new();
1501 mem::swap(&mut htlc_updates, &mut self.holding_cell_htlc_updates);
1502 let mut update_add_htlcs = Vec::with_capacity(htlc_updates.len());
1503 let mut update_fulfill_htlcs = Vec::with_capacity(htlc_updates.len());
1504 let mut update_fail_htlcs = Vec::with_capacity(htlc_updates.len());
1506 for htlc_update in htlc_updates.drain(..) {
1507 // Note that this *can* fail, though it should be due to rather-rare conditions on
1508 // fee races with adding too many outputs which push our total payments just over
1509 // the limit. In case its less rare than I anticipate, we may want to revisit
1510 // handling this case better and maybe fufilling some of the HTLCs while attempting
1511 // to rebalance channels.
1512 if err.is_some() { // We're back to AwaitingRemoteRevoke (or are about to fail the channel)
1513 self.holding_cell_htlc_updates.push(htlc_update);
1515 match &htlc_update {
1516 &HTLCUpdateAwaitingACK::AddHTLC {amount_msat, cltv_expiry, payment_hash, ref onion_routing_packet, ..} => {
1517 match self.send_htlc(amount_msat, payment_hash, cltv_expiry, onion_routing_packet.clone()) {
1518 Ok(update_add_msg_option) => update_add_htlcs.push(update_add_msg_option.unwrap()),
1524 &HTLCUpdateAwaitingACK::ClaimHTLC { payment_preimage, .. } => {
1525 match self.get_update_fulfill_htlc(payment_preimage) {
1526 Ok(update_fulfill_msg_option) => update_fulfill_htlcs.push(update_fulfill_msg_option.0.unwrap()),
1532 &HTLCUpdateAwaitingACK::FailHTLC { payment_hash, ref err_packet } => {
1533 match self.get_update_fail_htlc(&payment_hash, err_packet.clone()) {
1534 Ok(update_fail_msg_option) => update_fail_htlcs.push(update_fail_msg_option.unwrap()),
1542 self.holding_cell_htlc_updates.push(htlc_update);
1546 //TODO: Need to examine the type of err - if its a fee issue or similar we may want to
1547 //fail it back the route, if its a temporary issue we can ignore it...
1550 let (commitment_signed, monitor_update) = self.send_commitment_no_status_check()?;
1551 Ok(Some((msgs::CommitmentUpdate {
1553 update_fulfill_htlcs,
1556 }, monitor_update)))
1565 /// Handles receiving a remote's revoke_and_ack. Note that we may return a new
1566 /// commitment_signed message here in case we had pending outbound HTLCs to add which were
1567 /// waiting on this revoke_and_ack. The generation of this new commitment_signed may also fail,
1568 /// generating an appropriate error *after* the channel state has been updated based on the
1569 /// revoke_and_ack message.
1570 pub fn revoke_and_ack(&mut self, msg: &msgs::RevokeAndACK) -> Result<(Option<msgs::CommitmentUpdate>, Vec<PendingForwardHTLCInfo>, Vec<([u8; 32], HTLCFailReason)>, ChannelMonitor), HandleError> {
1571 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
1572 return Err(HandleError{err: "Got revoke/ACK message when channel was not in an operational state", action: None});
1574 if let Some(their_prev_commitment_point) = self.their_prev_commitment_point {
1575 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 {
1576 return Err(HandleError{err: "Got a revoke commitment secret which didn't correspond to their current pubkey", action: None});
1579 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)))?;
1581 // Update state now that we've passed all the can-fail calls...
1582 // (note that we may still fail to generate the new commitment_signed message, but that's
1583 // OK, we step the channel here and *then* if the new generation fails we can fail the
1584 // channel based on that, but stepping stuff here should be safe either way.
1585 self.channel_state &= !(ChannelState::AwaitingRemoteRevoke as u32);
1586 self.their_prev_commitment_point = Some(self.their_cur_commitment_point);
1587 self.their_cur_commitment_point = msg.next_per_commitment_point;
1588 self.cur_remote_commitment_transaction_number -= 1;
1590 let mut to_forward_infos = Vec::new();
1591 let mut revoked_htlcs = Vec::new();
1592 let mut require_commitment = false;
1593 let mut value_to_self_msat_diff: i64 = 0;
1594 // We really shouldnt have two passes here, but retain gives a non-mutable ref (Rust bug)
1595 self.pending_htlcs.retain(|htlc| {
1596 if htlc.state == HTLCState::LocalRemoved {
1597 if htlc.local_removed_fulfilled { true } else { false }
1598 } else if htlc.state == HTLCState::AwaitingRemovedRemoteRevoke {
1599 if let Some(reason) = htlc.fail_reason.clone() { // We really want take() here, but, again, non-mut ref :(
1600 revoked_htlcs.push((htlc.payment_hash, reason));
1602 // They fulfilled, so we sent them money
1603 value_to_self_msat_diff -= htlc.amount_msat as i64;
1608 for htlc in self.pending_htlcs.iter_mut() {
1609 if htlc.state == HTLCState::LocalAnnounced {
1610 htlc.state = HTLCState::Committed;
1611 } else if htlc.state == HTLCState::AwaitingRemoteRevokeToAnnounce {
1612 htlc.state = HTLCState::AwaitingAnnouncedRemoteRevoke;
1613 require_commitment = true;
1614 } else if htlc.state == HTLCState::AwaitingAnnouncedRemoteRevoke {
1615 htlc.state = HTLCState::Committed;
1616 to_forward_infos.push(htlc.pending_forward_state.take().unwrap());
1617 } else if htlc.state == HTLCState::AwaitingRemoteRevokeToRemove {
1618 htlc.state = HTLCState::AwaitingRemovedRemoteRevoke;
1619 require_commitment = true;
1620 } else if htlc.state == HTLCState::LocalRemoved {
1621 assert!(htlc.local_removed_fulfilled);
1622 htlc.state = HTLCState::LocalRemovedAwaitingCommitment;
1625 self.value_to_self_msat = (self.value_to_self_msat as i64 + value_to_self_msat_diff) as u64;
1627 match self.free_holding_cell_htlcs()? {
1628 Some(commitment_update) => {
1629 Ok((Some(commitment_update.0), to_forward_infos, revoked_htlcs, commitment_update.1))
1632 if require_commitment {
1633 let (commitment_signed, monitor_update) = self.send_commitment_no_status_check()?;
1634 Ok((Some(msgs::CommitmentUpdate {
1635 update_add_htlcs: Vec::new(),
1636 update_fulfill_htlcs: Vec::new(),
1637 update_fail_htlcs: Vec::new(),
1639 }), to_forward_infos, revoked_htlcs, monitor_update))
1641 Ok((None, to_forward_infos, revoked_htlcs, self.channel_monitor.clone()))
1647 pub fn update_fee(&mut self, fee_estimator: &FeeEstimator, msg: &msgs::UpdateFee) -> Result<(), HandleError> {
1648 if self.channel_outbound {
1649 return Err(HandleError{err: "Non-funding remote tried to update channel fee", action: None});
1651 Channel::check_remote_fee(fee_estimator, msg.feerate_per_kw)?;
1652 self.channel_update_count += 1;
1653 self.feerate_per_kw = msg.feerate_per_kw as u64;
1657 pub fn shutdown(&mut self, fee_estimator: &FeeEstimator, msg: &msgs::Shutdown) -> Result<(Option<msgs::Shutdown>, Option<msgs::ClosingSigned>, Vec<[u8; 32]>), HandleError> {
1658 if self.channel_state < ChannelState::FundingSent as u32 {
1659 self.channel_state = ChannelState::ShutdownComplete as u32;
1660 self.channel_update_count += 1;
1661 return Ok((None, None, Vec::new()));
1663 for htlc in self.pending_htlcs.iter() {
1664 if htlc.state == HTLCState::RemoteAnnounced {
1665 return Err(HandleError{err: "Got shutdown with remote pending HTLCs", action: None});
1668 if (self.channel_state & ChannelState::RemoteShutdownSent as u32) == ChannelState::RemoteShutdownSent as u32 {
1669 return Err(HandleError{err: "Remote peer sent duplicate shutdown message", action: None});
1671 assert_eq!(self.channel_state & ChannelState::ShutdownComplete as u32, 0);
1673 // BOLT 2 says we must only send a scriptpubkey of certain standard forms, which are up to
1674 // 34 bytes in length, so dont let the remote peer feed us some super fee-heavy script.
1675 if self.channel_outbound && msg.scriptpubkey.len() > 34 {
1676 return Err(HandleError{err: "Got shutdown_scriptpubkey of absurd length from remote peer", action: None});
1678 //TODO: Check shutdown_scriptpubkey form as BOLT says we must? WHYYY
1680 if self.their_shutdown_scriptpubkey.is_some() {
1681 if Some(&msg.scriptpubkey) != self.their_shutdown_scriptpubkey.as_ref() {
1682 return Err(HandleError{err: "Got shutdown request with a scriptpubkey which did not match their previous scriptpubkey", action: None});
1685 self.their_shutdown_scriptpubkey = Some(msg.scriptpubkey.clone());
1688 let our_closing_script = self.get_closing_scriptpubkey();
1690 let (proposed_feerate, proposed_fee, our_sig) = if self.channel_outbound && self.pending_htlcs.is_empty() {
1691 let mut proposed_feerate = fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Background);
1692 if self.feerate_per_kw > proposed_feerate {
1693 proposed_feerate = self.feerate_per_kw;
1695 let tx_weight = Self::get_closing_transaction_weight(&our_closing_script, &msg.scriptpubkey);
1696 let proposed_total_fee_satoshis = proposed_feerate * tx_weight / 1000;
1698 let (closing_tx, total_fee_satoshis) = self.build_closing_transaction(proposed_total_fee_satoshis, false);
1699 let funding_redeemscript = self.get_funding_redeemscript();
1700 let sighash = Message::from_slice(&bip143::SighashComponents::new(&closing_tx).sighash_all(&closing_tx.input[0], &funding_redeemscript, self.channel_value_satoshis)[..]).unwrap();
1702 (Some(proposed_feerate), Some(total_fee_satoshis), Some(self.secp_ctx.sign(&sighash, &self.local_keys.funding_key).unwrap()))
1703 } else { (None, None, None) };
1705 // From here on out, we may not fail!
1707 self.channel_state |= ChannelState::RemoteShutdownSent as u32;
1708 self.channel_update_count += 1;
1710 // We can't send our shutdown until we've committed all of our pending HTLCs, but the
1711 // remote side is unlikely to accept any new HTLCs, so we go ahead and "free" any holding
1712 // cell HTLCs and return them to fail the payment.
1713 let mut dropped_outbound_htlcs = Vec::with_capacity(self.holding_cell_htlc_updates.len());
1714 self.holding_cell_htlc_updates.retain(|htlc_update| {
1716 &HTLCUpdateAwaitingACK::AddHTLC { ref payment_hash, .. } => {
1717 dropped_outbound_htlcs.push(payment_hash.clone());
1723 for htlc in self.pending_htlcs.iter() {
1724 if htlc.state == HTLCState::LocalAnnounced {
1725 return Ok((None, None, dropped_outbound_htlcs));
1729 let our_shutdown = if (self.channel_state & ChannelState::LocalShutdownSent as u32) == ChannelState::LocalShutdownSent as u32 {
1732 Some(msgs::Shutdown {
1733 channel_id: self.channel_id,
1734 scriptpubkey: our_closing_script,
1738 self.channel_state |= ChannelState::LocalShutdownSent as u32;
1739 self.channel_update_count += 1;
1740 if self.pending_htlcs.is_empty() && self.channel_outbound {
1741 // There are no more HTLCs and we're the funder, this means we start the closing_signed
1742 // dance with an initial fee proposal!
1743 self.last_sent_closing_fee = Some((proposed_feerate.unwrap(), proposed_fee.unwrap()));
1744 Ok((our_shutdown, Some(msgs::ClosingSigned {
1745 channel_id: self.channel_id,
1746 fee_satoshis: proposed_fee.unwrap(),
1747 signature: our_sig.unwrap(),
1748 }), dropped_outbound_htlcs))
1750 Ok((our_shutdown, None, dropped_outbound_htlcs))
1754 pub fn closing_signed(&mut self, fee_estimator: &FeeEstimator, msg: &msgs::ClosingSigned) -> Result<(Option<msgs::ClosingSigned>, Option<Transaction>), HandleError> {
1755 if self.channel_state & BOTH_SIDES_SHUTDOWN_MASK != BOTH_SIDES_SHUTDOWN_MASK {
1756 return Err(HandleError{err: "Remote end sent us a closing_signed before both sides provided a shutdown", action: None});
1758 if !self.pending_htlcs.is_empty() {
1759 return Err(HandleError{err: "Remote end sent us a closing_signed while there were still pending HTLCs", action: None});
1761 if msg.fee_satoshis > 21000000 * 10000000 {
1762 return Err(HandleError{err: "Remote tried to send us a closing tx with > 21 million BTC fee", action: None});
1765 let funding_redeemscript = self.get_funding_redeemscript();
1766 let (mut closing_tx, used_total_fee) = self.build_closing_transaction(msg.fee_satoshis, false);
1767 if used_total_fee != msg.fee_satoshis {
1768 return Err(HandleError{err: "Remote sent us a closing_signed with a fee greater than the value they can claim", action: None});
1770 let mut sighash = Message::from_slice(&bip143::SighashComponents::new(&closing_tx).sighash_all(&closing_tx.input[0], &funding_redeemscript, self.channel_value_satoshis)[..]).unwrap();
1772 match self.secp_ctx.verify(&sighash, &msg.signature, &self.their_funding_pubkey) {
1775 // The remote end may have decided to revoke their output due to inconsistent dust
1776 // limits, so check for that case by re-checking the signature here.
1777 closing_tx = self.build_closing_transaction(msg.fee_satoshis, true).0;
1778 sighash = Message::from_slice(&bip143::SighashComponents::new(&closing_tx).sighash_all(&closing_tx.input[0], &funding_redeemscript, self.channel_value_satoshis)[..]).unwrap();
1779 secp_call!(self.secp_ctx.verify(&sighash, &msg.signature, &self.their_funding_pubkey), "Invalid closing tx signature from peer");
1783 if let Some((_, last_fee)) = self.last_sent_closing_fee {
1784 if last_fee == msg.fee_satoshis {
1785 self.sign_commitment_transaction(&mut closing_tx, &msg.signature);
1786 self.channel_state = ChannelState::ShutdownComplete as u32;
1787 self.channel_update_count += 1;
1788 return Ok((None, Some(closing_tx)));
1792 macro_rules! propose_new_feerate {
1793 ($new_feerate: expr) => {
1794 let closing_tx_max_weight = Self::get_closing_transaction_weight(&self.get_closing_scriptpubkey(), self.their_shutdown_scriptpubkey.as_ref().unwrap());
1795 let (closing_tx, used_total_fee) = self.build_closing_transaction($new_feerate * closing_tx_max_weight / 1000, false);
1796 sighash = Message::from_slice(&bip143::SighashComponents::new(&closing_tx).sighash_all(&closing_tx.input[0], &funding_redeemscript, self.channel_value_satoshis)[..]).unwrap();
1797 let our_sig = self.secp_ctx.sign(&sighash, &self.local_keys.funding_key).unwrap();
1798 self.last_sent_closing_fee = Some(($new_feerate, used_total_fee));
1799 return Ok((Some(msgs::ClosingSigned {
1800 channel_id: self.channel_id,
1801 fee_satoshis: used_total_fee,
1807 let proposed_sat_per_kw = msg.fee_satoshis * 1000 / closing_tx.get_weight();
1808 if self.channel_outbound {
1809 let our_max_feerate = fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Normal);
1810 if proposed_sat_per_kw > our_max_feerate {
1811 if let Some((last_feerate, _)) = self.last_sent_closing_fee {
1812 if our_max_feerate <= last_feerate {
1813 return Err(HandleError{err: "Unable to come to consensus about closing feerate, remote wanted something higher than our Normal feerate", action: None});
1816 propose_new_feerate!(our_max_feerate);
1819 let our_min_feerate = fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Background);
1820 if proposed_sat_per_kw < our_min_feerate {
1821 if let Some((last_feerate, _)) = self.last_sent_closing_fee {
1822 if our_min_feerate >= last_feerate {
1823 return Err(HandleError{err: "Unable to come to consensus about closing feerate, remote wanted something lower than our Background feerate", action: None});
1826 propose_new_feerate!(our_min_feerate);
1830 let our_sig = self.sign_commitment_transaction(&mut closing_tx, &msg.signature);
1831 self.channel_state = ChannelState::ShutdownComplete as u32;
1832 self.channel_update_count += 1;
1834 Ok((Some(msgs::ClosingSigned {
1835 channel_id: self.channel_id,
1836 fee_satoshis: msg.fee_satoshis,
1838 }), Some(closing_tx)))
1841 // Public utilities:
1843 pub fn channel_id(&self) -> [u8; 32] {
1847 /// Gets the "user_id" value passed into the construction of this channel. It has no special
1848 /// meaning and exists only to allow users to have a persistent identifier of a channel.
1849 pub fn get_user_id(&self) -> u64 {
1853 /// May only be called after funding has been initiated (ie is_funding_initiated() is true)
1854 pub fn channel_monitor(&self) -> ChannelMonitor {
1855 if self.channel_state < ChannelState::FundingCreated as u32 {
1856 panic!("Can't get a channel monitor until funding has been created");
1858 self.channel_monitor.clone()
1861 /// Guaranteed to be Some after both FundingLocked messages have been exchanged (and, thus,
1862 /// is_usable() returns true).
1863 /// Allowed in any state (including after shutdown)
1864 pub fn get_short_channel_id(&self) -> Option<u64> {
1865 self.short_channel_id
1868 /// Returns the funding_txo we either got from our peer, or were given by
1869 /// get_outbound_funding_created.
1870 pub fn get_funding_txo(&self) -> Option<OutPoint> {
1871 self.channel_monitor.get_funding_txo()
1874 /// Allowed in any state (including after shutdown)
1875 pub fn get_their_node_id(&self) -> PublicKey {
1879 /// Allowed in any state (including after shutdown)
1880 pub fn get_our_htlc_minimum_msat(&self) -> u64 {
1881 self.our_htlc_minimum_msat
1884 pub fn get_value_satoshis(&self) -> u64 {
1885 self.channel_value_satoshis
1888 /// Allowed in any state (including after shutdown)
1889 pub fn get_channel_update_count(&self) -> u32 {
1890 self.channel_update_count
1893 pub fn should_announce(&self) -> bool {
1894 self.announce_publicly
1897 /// Gets the fee we'd want to charge for adding an HTLC output to this Channel
1898 /// Allowed in any state (including after shutdown)
1899 pub fn get_our_fee_base_msat(&self, fee_estimator: &FeeEstimator) -> u32 {
1900 // For lack of a better metric, we calculate what it would cost to consolidate the new HTLC
1901 // output value back into a transaction with the regular channel output:
1903 // the fee cost of the HTLC-Success/HTLC-Timeout transaction:
1904 let mut res = self.feerate_per_kw * cmp::max(HTLC_TIMEOUT_TX_WEIGHT, HTLC_SUCCESS_TX_WEIGHT) / 1000;
1906 if self.channel_outbound {
1907 // + the marginal fee increase cost to us in the commitment transaction:
1908 res += self.feerate_per_kw * COMMITMENT_TX_WEIGHT_PER_HTLC / 1000;
1911 // + the marginal cost of an input which spends the HTLC-Success/HTLC-Timeout output:
1912 res += fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Normal) * SPENDING_INPUT_FOR_A_OUTPUT_WEIGHT / 1000;
1917 /// Returns true if this channel is fully established and not known to be closing.
1918 /// Allowed in any state (including after shutdown)
1919 pub fn is_usable(&self) -> bool {
1920 let mask = ChannelState::ChannelFunded as u32 | BOTH_SIDES_SHUTDOWN_MASK;
1921 (self.channel_state & mask) == (ChannelState::ChannelFunded as u32)
1924 /// Returns true if this channel is currently available for use. This is a superset of
1925 /// is_usable() and considers things like the channel being temporarily disabled.
1926 /// Allowed in any state (including after shutdown)
1927 pub fn is_live(&self) -> bool {
1931 /// Returns true if funding_created was sent/received.
1932 pub fn is_funding_initiated(&self) -> bool {
1933 self.channel_state >= ChannelState::FundingCreated as u32
1936 /// Returns true if this channel is fully shut down. True here implies that no further actions
1937 /// may/will be taken on this channel, and thus this object should be freed. Any future changes
1938 /// will be handled appropriately by the chain monitor.
1939 pub fn is_shutdown(&self) -> bool {
1940 if (self.channel_state & ChannelState::ShutdownComplete as u32) == ChannelState::ShutdownComplete as u32 {
1941 assert!(self.channel_state == ChannelState::ShutdownComplete as u32);
1946 /// Called by channelmanager based on chain blocks being connected.
1947 /// Note that we only need to use this to detect funding_signed, anything else is handled by
1948 /// the channel_monitor.
1949 /// In case of Err, the channel may have been closed, at which point the standard requirements
1950 /// apply - no calls may be made except those explicitly stated to be allowed post-shutdown.
1951 /// Only returns an ErrorAction of DisconnectPeer, if Err.
1952 pub fn block_connected(&mut self, header: &BlockHeader, height: u32, txn_matched: &[&Transaction], indexes_of_txn_matched: &[u32]) -> Result<Option<msgs::FundingLocked>, HandleError> {
1953 let non_shutdown_state = self.channel_state & (!BOTH_SIDES_SHUTDOWN_MASK);
1954 if self.funding_tx_confirmations > 0 {
1955 if header.bitcoin_hash() != self.last_block_connected {
1956 self.last_block_connected = header.bitcoin_hash();
1957 self.funding_tx_confirmations += 1;
1958 if self.funding_tx_confirmations == CONF_TARGET as u64 {
1959 let need_commitment_update = if non_shutdown_state == ChannelState::FundingSent as u32 {
1960 self.channel_state |= ChannelState::OurFundingLocked as u32;
1962 } else if non_shutdown_state == (ChannelState::FundingSent as u32 | ChannelState::TheirFundingLocked as u32) {
1963 self.channel_state = ChannelState::ChannelFunded as u32 | (self.channel_state & BOTH_SIDES_SHUTDOWN_MASK);
1964 self.channel_update_count += 1;
1966 } else if self.channel_state == (ChannelState::FundingSent as u32 | ChannelState::OurFundingLocked as u32) {
1967 // We got a reorg but not enough to trigger a force close, just update
1968 // funding_tx_confirmed_in and return.
1970 } else if self.channel_state < ChannelState::ChannelFunded as u32 {
1971 panic!("Started confirming a channel in a state pre-FundingSent?: {}", self.channel_state);
1973 // We got a reorg but not enough to trigger a force close, just update
1974 // funding_tx_confirmed_in and return.
1977 self.funding_tx_confirmed_in = Some(header.bitcoin_hash());
1979 //TODO: Note that this must be a duplicate of the previous commitment point they sent us,
1980 //as otherwise we will have a commitment transaction that they can't revoke (well, kinda,
1981 //they can by sending two revoke_and_acks back-to-back, but not really). This appears to be
1982 //a protocol oversight, but I assume I'm just missing something.
1983 if need_commitment_update {
1984 let next_per_commitment_secret = self.build_local_commitment_secret(self.cur_local_commitment_transaction_number);
1985 let next_per_commitment_point = PublicKey::from_secret_key(&self.secp_ctx, &next_per_commitment_secret).unwrap();
1986 return Ok(Some(msgs::FundingLocked {
1987 channel_id: self.channel_id,
1988 next_per_commitment_point: next_per_commitment_point,
1994 if non_shutdown_state & !(ChannelState::TheirFundingLocked as u32) == ChannelState::FundingSent as u32 {
1995 for (ref tx, index_in_block) in txn_matched.iter().zip(indexes_of_txn_matched) {
1996 if tx.txid() == self.channel_monitor.get_funding_txo().unwrap().txid {
1997 let txo_idx = self.channel_monitor.get_funding_txo().unwrap().index as usize;
1998 if txo_idx >= tx.output.len() || tx.output[txo_idx].script_pubkey != self.get_funding_redeemscript().to_v0_p2wsh() ||
1999 tx.output[txo_idx].value != self.channel_value_satoshis {
2000 self.channel_state = ChannelState::ShutdownComplete as u32;
2001 self.channel_update_count += 1;
2002 return Err(HandleError{err: "funding tx had wrong script/value", action: Some(ErrorAction::DisconnectPeer{msg: None})});
2004 self.funding_tx_confirmations = 1;
2005 self.short_channel_id = Some(((height as u64) << (5*8)) |
2006 ((*index_in_block as u64) << (2*8)) |
2007 ((txo_idx as u64) << (0*8)));
2015 /// Called by channelmanager based on chain blocks being disconnected.
2016 /// Returns true if we need to close the channel now due to funding transaction
2017 /// unconfirmation/reorg.
2018 pub fn block_disconnected(&mut self, header: &BlockHeader) -> bool {
2019 if self.funding_tx_confirmations > 0 {
2020 self.funding_tx_confirmations -= 1;
2021 if self.funding_tx_confirmations == UNCONF_THRESHOLD as u64 {
2025 if Some(header.bitcoin_hash()) == self.funding_tx_confirmed_in {
2026 self.funding_tx_confirmations = CONF_TARGET as u64 - 1;
2031 // Methods to get unprompted messages to send to the remote end (or where we already returned
2032 // something in the handler for the message that prompted this message):
2034 pub fn get_open_channel(&self, chain_hash: Sha256dHash, fee_estimator: &FeeEstimator) -> Result<msgs::OpenChannel, HandleError> {
2035 if !self.channel_outbound {
2036 panic!("Tried to open a channel for an inbound channel?");
2038 if self.channel_state != ChannelState::OurInitSent as u32 {
2039 return Err(HandleError{err: "Cannot generate an open_channel after we've moved forward", action: None});
2042 if self.cur_local_commitment_transaction_number != (1 << 48) - 1 {
2043 panic!("Tried to send an open_channel for a channel that has already advanced");
2046 let local_commitment_secret = self.build_local_commitment_secret(self.cur_local_commitment_transaction_number);
2048 Ok(msgs::OpenChannel {
2049 chain_hash: chain_hash,
2050 temporary_channel_id: self.channel_id,
2051 funding_satoshis: self.channel_value_satoshis,
2052 push_msat: 0, //TODO: Something about feerate?
2053 dust_limit_satoshis: self.our_dust_limit_satoshis,
2054 max_htlc_value_in_flight_msat: Channel::get_our_max_htlc_value_in_flight_msat(self.channel_value_satoshis),
2055 channel_reserve_satoshis: Channel::get_our_channel_reserve_satoshis(self.channel_value_satoshis),
2056 htlc_minimum_msat: self.our_htlc_minimum_msat,
2057 feerate_per_kw: fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Background) as u32,
2058 to_self_delay: BREAKDOWN_TIMEOUT,
2059 max_accepted_htlcs: OUR_MAX_HTLCS,
2060 funding_pubkey: PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.funding_key).unwrap(),
2061 revocation_basepoint: PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.revocation_base_key).unwrap(),
2062 payment_basepoint: PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.payment_base_key).unwrap(),
2063 delayed_payment_basepoint: PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.delayed_payment_base_key).unwrap(),
2064 htlc_basepoint: PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.htlc_base_key).unwrap(),
2065 first_per_commitment_point: PublicKey::from_secret_key(&self.secp_ctx, &local_commitment_secret).unwrap(),
2066 channel_flags: if self.announce_publicly {1} else {0},
2067 shutdown_scriptpubkey: None,
2071 pub fn get_accept_channel(&self) -> Result<msgs::AcceptChannel, HandleError> {
2072 if self.channel_outbound {
2073 panic!("Tried to send accept_channel for an outbound channel?");
2075 if self.channel_state != (ChannelState::OurInitSent as u32) | (ChannelState::TheirInitSent as u32) {
2076 panic!("Tried to send accept_channel after channel had moved forward");
2078 if self.cur_local_commitment_transaction_number != (1 << 48) - 1 {
2079 panic!("Tried to send an accept_channel for a channel that has already advanced");
2082 let local_commitment_secret = self.build_local_commitment_secret(self.cur_local_commitment_transaction_number);
2084 Ok(msgs::AcceptChannel {
2085 temporary_channel_id: self.channel_id,
2086 dust_limit_satoshis: self.our_dust_limit_satoshis,
2087 max_htlc_value_in_flight_msat: Channel::get_our_max_htlc_value_in_flight_msat(self.channel_value_satoshis),
2088 channel_reserve_satoshis: Channel::get_our_channel_reserve_satoshis(self.channel_value_satoshis),
2089 htlc_minimum_msat: self.our_htlc_minimum_msat,
2090 minimum_depth: CONF_TARGET,
2091 to_self_delay: BREAKDOWN_TIMEOUT,
2092 max_accepted_htlcs: OUR_MAX_HTLCS,
2093 funding_pubkey: PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.funding_key).unwrap(),
2094 revocation_basepoint: PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.revocation_base_key).unwrap(),
2095 payment_basepoint: PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.payment_base_key).unwrap(),
2096 delayed_payment_basepoint: PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.delayed_payment_base_key).unwrap(),
2097 htlc_basepoint: PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.htlc_base_key).unwrap(),
2098 first_per_commitment_point: PublicKey::from_secret_key(&self.secp_ctx, &local_commitment_secret).unwrap(),
2099 shutdown_scriptpubkey: None,
2103 fn get_outbound_funding_created_signature(&mut self) -> Result<(Signature, Transaction), HandleError> {
2104 let funding_script = self.get_funding_redeemscript();
2106 let remote_keys = self.build_remote_transaction_keys()?;
2107 let remote_initial_commitment_tx = self.build_commitment_transaction(self.cur_remote_commitment_transaction_number, &remote_keys, false, false).0;
2108 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();
2110 // We sign the "remote" commitment transaction, allowing them to broadcast the tx if they wish.
2111 Ok((self.secp_ctx.sign(&remote_sighash, &self.local_keys.funding_key).unwrap(), remote_initial_commitment_tx))
2114 /// Updates channel state with knowledge of the funding transaction's txid/index, and generates
2115 /// a funding_created message for the remote peer.
2116 /// Panics if called at some time other than immediately after initial handshake, if called twice,
2117 /// or if called on an inbound channel.
2118 /// Note that channel_id changes during this call!
2119 /// Do NOT broadcast the funding transaction until after a successful funding_signed call!
2120 pub fn get_outbound_funding_created(&mut self, funding_txo: OutPoint) -> Result<(msgs::FundingCreated, ChannelMonitor), HandleError> {
2121 if !self.channel_outbound {
2122 panic!("Tried to create outbound funding_created message on an inbound channel!");
2124 if self.channel_state != (ChannelState::OurInitSent as u32 | ChannelState::TheirInitSent as u32) {
2125 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)");
2127 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 {
2128 panic!("Should not have advanced channel commitment tx numbers prior to funding_created");
2131 let funding_txo_script = self.get_funding_redeemscript().to_v0_p2wsh();
2132 self.channel_monitor.set_funding_info((funding_txo, funding_txo_script));
2134 let (our_signature, commitment_tx) = match self.get_outbound_funding_created_signature() {
2137 log_error!(self, "Got bad signatures: {}!", e.err);
2138 self.channel_monitor.unset_funding_info();
2143 let temporary_channel_id = self.channel_id;
2145 // Now that we're past error-generating stuff, update our local state:
2146 self.channel_monitor.provide_latest_remote_commitment_tx_info(&commitment_tx, Vec::new(), self.cur_remote_commitment_transaction_number);
2147 self.channel_state = ChannelState::FundingCreated as u32;
2148 self.channel_id = funding_txo.to_channel_id();
2149 self.cur_remote_commitment_transaction_number -= 1;
2151 Ok((msgs::FundingCreated {
2152 temporary_channel_id: temporary_channel_id,
2153 funding_txid: funding_txo.txid,
2154 funding_output_index: funding_txo.index,
2155 signature: our_signature
2156 }, self.channel_monitor.clone()))
2159 /// Gets an UnsignedChannelAnnouncement, as well as a signature covering it using our
2160 /// bitcoin_key, if available, for this channel. The channel must be publicly announceable and
2161 /// available for use (have exchanged FundingLocked messages in both directions. Should be used
2162 /// for both loose and in response to an AnnouncementSignatures message from the remote peer.
2163 /// Note that you can get an announcement for a channel which is closing, though you should
2164 /// likely not announce such a thing. In case its already been announced, a channel_update
2165 /// message can mark the channel disabled.
2166 pub fn get_channel_announcement(&self, our_node_id: PublicKey, chain_hash: Sha256dHash) -> Result<(msgs::UnsignedChannelAnnouncement, Signature), HandleError> {
2167 if !self.announce_publicly {
2168 return Err(HandleError{err: "Channel is not available for public announcements", action: None});
2170 if self.channel_state & (ChannelState::ChannelFunded as u32) != (ChannelState::ChannelFunded as u32) {
2171 return Err(HandleError{err: "Cannot get a ChannelAnnouncement until the channel funding has been locked", action: None});
2174 let were_node_one = our_node_id.serialize()[..] < self.their_node_id.serialize()[..];
2175 let our_bitcoin_key = PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.funding_key).unwrap();
2177 let msg = msgs::UnsignedChannelAnnouncement {
2178 features: msgs::GlobalFeatures::new(),
2179 chain_hash: chain_hash,
2180 short_channel_id: self.get_short_channel_id().unwrap(),
2181 node_id_1: if were_node_one { our_node_id } else { self.get_their_node_id() },
2182 node_id_2: if were_node_one { self.get_their_node_id() } else { our_node_id },
2183 bitcoin_key_1: if were_node_one { our_bitcoin_key } else { self.their_funding_pubkey },
2184 bitcoin_key_2: if were_node_one { self.their_funding_pubkey } else { our_bitcoin_key },
2187 let msghash = Message::from_slice(&Sha256dHash::from_data(&msg.encode()[..])[..]).unwrap();
2188 let sig = self.secp_ctx.sign(&msghash, &self.local_keys.funding_key).unwrap();
2194 // Send stuff to our remote peers:
2196 /// Adds a pending outbound HTLC to this channel, note that you probably want
2197 /// send_htlc_and_commit instead cause you'll want both messages at once.
2198 /// This returns an option instead of a pure UpdateAddHTLC as we may be in a state where we are
2199 /// waiting on the remote peer to send us a revoke_and_ack during which time we cannot add new
2200 /// HTLCs on the wire or we wouldn't be able to determine what they actually ACK'ed.
2201 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> {
2202 if (self.channel_state & (ChannelState::ChannelFunded as u32 | BOTH_SIDES_SHUTDOWN_MASK)) != (ChannelState::ChannelFunded as u32) {
2203 return Err(HandleError{err: "Cannot send HTLC until channel is fully established and we haven't started shutting down", action: None});
2206 if amount_msat > self.channel_value_satoshis * 1000 {
2207 return Err(HandleError{err: "Cannot send more than the total value of the channel", action: None});
2209 if amount_msat < self.their_htlc_minimum_msat {
2210 return Err(HandleError{err: "Cannot send less than their minimum HTLC value", action: None});
2213 let (_, outbound_htlc_count, htlc_outbound_value_msat, htlc_inbound_value_msat) = self.get_pending_htlc_stats(false);
2214 if outbound_htlc_count + 1 > self.their_max_accepted_htlcs as u32 {
2215 return Err(HandleError{err: "Cannot push more than their max accepted HTLCs", action: None});
2217 //TODO: Spec is unclear if this is per-direction or in total (I assume per direction):
2218 // Check their_max_htlc_value_in_flight_msat
2219 if htlc_outbound_value_msat + amount_msat > self.their_max_htlc_value_in_flight_msat {
2220 return Err(HandleError{err: "Cannot send value that would put us over our max HTLC value in flight", action: None});
2222 // Check their_channel_reserve_satoshis:
2223 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 {
2224 return Err(HandleError{err: "Cannot send value that would put us over our reserve value", action: None});
2227 //TODO: Check cltv_expiry? Do this in channel manager?
2229 // Now update local state:
2230 if (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32)) == (ChannelState::AwaitingRemoteRevoke as u32) {
2231 //TODO: Check the limits *including* other pending holding cell HTLCs!
2232 self.holding_cell_htlc_updates.push(HTLCUpdateAwaitingACK::AddHTLC {
2233 amount_msat: amount_msat,
2234 payment_hash: payment_hash,
2235 cltv_expiry: cltv_expiry,
2236 onion_routing_packet: onion_routing_packet,
2237 time_created: Instant::now(),
2242 self.pending_htlcs.push(HTLCOutput {
2244 htlc_id: self.next_local_htlc_id,
2245 amount_msat: amount_msat,
2246 payment_hash: payment_hash.clone(),
2247 cltv_expiry: cltv_expiry,
2248 state: HTLCState::LocalAnnounced,
2250 local_removed_fulfilled: false,
2251 pending_forward_state: None
2254 let res = msgs::UpdateAddHTLC {
2255 channel_id: self.channel_id,
2256 htlc_id: self.next_local_htlc_id,
2257 amount_msat: amount_msat,
2258 payment_hash: payment_hash,
2259 cltv_expiry: cltv_expiry,
2260 onion_routing_packet: onion_routing_packet,
2262 self.next_local_htlc_id += 1;
2267 /// Creates a signed commitment transaction to send to the remote peer.
2268 pub fn send_commitment(&mut self) -> Result<(msgs::CommitmentSigned, ChannelMonitor), HandleError> {
2269 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
2270 return Err(HandleError{err: "Cannot create commitment tx until channel is fully established", action: None});
2272 if (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32)) == (ChannelState::AwaitingRemoteRevoke as u32) {
2273 return Err(HandleError{err: "Cannot create commitment tx until remote revokes their previous commitment", action: None});
2275 let mut have_updates = false; // TODO initialize with "have we sent a fee update?"
2276 for htlc in self.pending_htlcs.iter() {
2277 if htlc.state == HTLCState::LocalAnnounced {
2278 have_updates = true;
2280 if have_updates { break; }
2283 return Err(HandleError{err: "Cannot create commitment tx until we have some updates to send", action: None});
2285 self.send_commitment_no_status_check()
2287 /// Only fails in case of bad keys
2288 fn send_commitment_no_status_check(&mut self) -> Result<(msgs::CommitmentSigned, ChannelMonitor), HandleError> {
2289 let funding_script = self.get_funding_redeemscript();
2291 // We can upgrade the status of some HTLCs that are waiting on a commitment, even if we
2292 // fail to generate this, we still are at least at a position where upgrading their status
2294 for htlc in self.pending_htlcs.iter_mut() {
2295 if htlc.state == HTLCState::AwaitingRemoteRevokeToAnnounce {
2296 htlc.state = HTLCState::AwaitingAnnouncedRemoteRevoke;
2297 } else if htlc.state == HTLCState::AwaitingRemoteRevokeToRemove {
2298 htlc.state = HTLCState::AwaitingRemovedRemoteRevoke;
2302 let remote_keys = self.build_remote_transaction_keys()?;
2303 let remote_commitment_tx = self.build_commitment_transaction(self.cur_remote_commitment_transaction_number, &remote_keys, false, true);
2304 let remote_commitment_txid = remote_commitment_tx.0.txid();
2305 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();
2306 let our_sig = self.secp_ctx.sign(&remote_sighash, &self.local_keys.funding_key).unwrap();
2308 let mut htlc_sigs = Vec::new();
2310 for ref htlc in remote_commitment_tx.1.iter() {
2311 let htlc_tx = self.build_htlc_transaction(&remote_commitment_txid, htlc, false, &remote_keys);
2312 let htlc_redeemscript = chan_utils::get_htlc_redeemscript(&htlc, &remote_keys);
2313 let htlc_sighash = Message::from_slice(&bip143::SighashComponents::new(&htlc_tx).sighash_all(&htlc_tx.input[0], &htlc_redeemscript, htlc.amount_msat / 1000)[..]).unwrap();
2314 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));
2315 htlc_sigs.push(self.secp_ctx.sign(&htlc_sighash, &our_htlc_key).unwrap());
2318 // Update state now that we've passed all the can-fail calls...
2319 self.channel_monitor.provide_latest_remote_commitment_tx_info(&remote_commitment_tx.0, remote_commitment_tx.1, self.cur_remote_commitment_transaction_number);
2320 self.channel_state |= ChannelState::AwaitingRemoteRevoke as u32;
2322 Ok((msgs::CommitmentSigned {
2323 channel_id: self.channel_id,
2325 htlc_signatures: htlc_sigs,
2326 }, self.channel_monitor.clone()))
2329 /// Adds a pending outbound HTLC to this channel, and creates a signed commitment transaction
2330 /// to send to the remote peer in one go.
2331 /// Shorthand for calling send_htlc() followed by send_commitment(), see docs on those for
2333 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> {
2334 match self.send_htlc(amount_msat, payment_hash, cltv_expiry, onion_routing_packet)? {
2335 Some(update_add_htlc) => {
2336 let (commitment_signed, monitor_update) = self.send_commitment_no_status_check()?;
2337 Ok(Some((update_add_htlc, commitment_signed, monitor_update)))
2343 /// Begins the shutdown process, getting a message for the remote peer and returning all
2344 /// holding cell HTLCs for payment failure.
2345 pub fn get_shutdown(&mut self) -> Result<(msgs::Shutdown, Vec<[u8; 32]>), HandleError> {
2346 for htlc in self.pending_htlcs.iter() {
2347 if htlc.state == HTLCState::LocalAnnounced {
2348 return Err(HandleError{err: "Cannot begin shutdown with pending HTLCs, call send_commitment first", action: None});
2351 if self.channel_state & BOTH_SIDES_SHUTDOWN_MASK != 0 {
2352 return Err(HandleError{err: "Shutdown already in progress", action: None});
2354 assert_eq!(self.channel_state & ChannelState::ShutdownComplete as u32, 0);
2356 let our_closing_script = self.get_closing_scriptpubkey();
2358 // From here on out, we may not fail!
2359 if self.channel_state < ChannelState::FundingSent as u32 {
2360 self.channel_state = ChannelState::ShutdownComplete as u32;
2362 self.channel_state |= ChannelState::LocalShutdownSent as u32;
2364 self.channel_update_count += 1;
2366 // We can't send our shutdown until we've committed all of our pending HTLCs, but the
2367 // remote side is unlikely to accept any new HTLCs, so we go ahead and "free" any holding
2368 // cell HTLCs and return them to fail the payment.
2369 let mut dropped_outbound_htlcs = Vec::with_capacity(self.holding_cell_htlc_updates.len());
2370 self.holding_cell_htlc_updates.retain(|htlc_update| {
2372 &HTLCUpdateAwaitingACK::AddHTLC { ref payment_hash, .. } => {
2373 dropped_outbound_htlcs.push(payment_hash.clone());
2380 Ok((msgs::Shutdown {
2381 channel_id: self.channel_id,
2382 scriptpubkey: our_closing_script,
2383 }, dropped_outbound_htlcs))
2386 /// Gets the latest commitment transaction and any dependant transactions for relay (forcing
2387 /// shutdown of this channel - no more calls into this Channel may be made afterwards except
2388 /// those explicitly stated to be allowed after shutdown completes, eg some simple getters).
2389 /// Also returns the list of payment_hashes for channels which we can safely fail backwards
2390 /// immediately (others we will have to allow to time out).
2391 pub fn force_shutdown(&mut self) -> (Vec<Transaction>, Vec<[u8; 32]>) {
2392 assert!(self.channel_state != ChannelState::ShutdownComplete as u32);
2394 // We go ahead and "free" any holding cell HTLCs or HTLCs we haven't yet committed to and
2395 // return them to fail the payment.
2396 let mut dropped_outbound_htlcs = Vec::with_capacity(self.holding_cell_htlc_updates.len());
2397 for htlc_update in self.holding_cell_htlc_updates.drain(..) {
2399 HTLCUpdateAwaitingACK::AddHTLC { payment_hash, .. } => {
2400 dropped_outbound_htlcs.push(payment_hash);
2406 for htlc in self.pending_htlcs.drain(..) {
2407 if htlc.state == HTLCState::LocalAnnounced {
2408 dropped_outbound_htlcs.push(htlc.payment_hash);
2410 //TODO: Do something with the remaining HTLCs
2411 //(we need to have the ChannelManager monitor them so we can claim the inbound HTLCs
2415 self.channel_state = ChannelState::ShutdownComplete as u32;
2416 self.channel_update_count += 1;
2417 let mut res = Vec::new();
2418 mem::swap(&mut res, &mut self.last_local_commitment_txn);
2419 (res, dropped_outbound_htlcs)
2425 use bitcoin::util::hash::Sha256dHash;
2426 use bitcoin::util::bip143;
2427 use bitcoin::network::serialize::serialize;
2428 use bitcoin::blockdata::script::Script;
2429 use bitcoin::blockdata::transaction::Transaction;
2431 use ln::channel::{Channel,ChannelKeys,HTLCOutput,HTLCState,HTLCOutputInCommitment,TxCreationKeys};
2432 use ln::channel::MAX_FUNDING_SATOSHIS;
2434 use chain::chaininterface::{FeeEstimator,ConfirmationTarget};
2435 use chain::transaction::OutPoint;
2436 use util::test_utils;
2437 use util::logger::Logger;
2438 use secp256k1::{Secp256k1,Message,Signature};
2439 use secp256k1::key::{SecretKey,PublicKey};
2440 use crypto::sha2::Sha256;
2441 use crypto::digest::Digest;
2444 struct TestFeeEstimator {
2447 impl FeeEstimator for TestFeeEstimator {
2448 fn get_est_sat_per_1000_weight(&self, _: ConfirmationTarget) -> u64 {
2454 fn test_max_funding_satoshis() {
2455 assert!(MAX_FUNDING_SATOSHIS <= 21_000_000 * 100_000_000,
2456 "MAX_FUNDING_SATOSHIS is greater than all satoshis on existence");
2460 fn outbound_commitment_test() {
2461 // Test vectors from BOLT 3 Appendix C:
2462 let feeest = TestFeeEstimator{fee_est: 15000};
2463 let logger : Arc<Logger> = Arc::new(test_utils::TestLogger::new());
2464 let secp_ctx = Secp256k1::new();
2466 let chan_keys = ChannelKeys {
2467 funding_key: SecretKey::from_slice(&secp_ctx, &hex::decode("30ff4956bbdd3222d44cc5e8a1261dab1e07957bdac5ae88fe3261ef321f3749").unwrap()[..]).unwrap(),
2468 payment_base_key: SecretKey::from_slice(&secp_ctx, &hex::decode("1111111111111111111111111111111111111111111111111111111111111111").unwrap()[..]).unwrap(),
2469 delayed_payment_base_key: SecretKey::from_slice(&secp_ctx, &hex::decode("3333333333333333333333333333333333333333333333333333333333333333").unwrap()[..]).unwrap(),
2470 htlc_base_key: SecretKey::from_slice(&secp_ctx, &hex::decode("1111111111111111111111111111111111111111111111111111111111111111").unwrap()[..]).unwrap(),
2472 // These aren't set in the test vectors:
2473 revocation_base_key: SecretKey::from_slice(&secp_ctx, &hex::decode("0fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff").unwrap()[..]).unwrap(),
2474 channel_close_key: SecretKey::from_slice(&secp_ctx, &hex::decode("0fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff").unwrap()[..]).unwrap(),
2475 channel_monitor_claim_key: SecretKey::from_slice(&secp_ctx, &hex::decode("0fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff").unwrap()[..]).unwrap(),
2476 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],
2478 assert_eq!(PublicKey::from_secret_key(&secp_ctx, &chan_keys.funding_key).unwrap().serialize()[..],
2479 hex::decode("023da092f6980e58d2c037173180e9a465476026ee50f96695963e8efe436f54eb").unwrap()[..]);
2481 let mut chan = Channel::new_outbound(&feeest, chan_keys, PublicKey::new(), 10000000, false, 42, Arc::clone(&logger)); // Nothing uses their network key in this test
2482 chan.their_to_self_delay = 144;
2483 chan.our_dust_limit_satoshis = 546;
2485 let funding_info = OutPoint::new(Sha256dHash::from_hex("8984484a580b825b9972d7adb15050b3ab624ccd731946b3eeddb92f4e7ef6be").unwrap(), 0);
2486 chan.channel_monitor.set_funding_info((funding_info, Script::new()));
2488 chan.their_payment_basepoint = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&secp_ctx, &hex::decode("4444444444444444444444444444444444444444444444444444444444444444").unwrap()[..]).unwrap()).unwrap();
2489 assert_eq!(chan.their_payment_basepoint.serialize()[..],
2490 hex::decode("032c0b7cf95324a07d05398b240174dc0c2be444d96b159aa6c7f7b1e668680991").unwrap()[..]);
2492 chan.their_funding_pubkey = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&secp_ctx, &hex::decode("1552dfba4f6cf29a62a0af13c8d6981d36d0ef8d61ba10fb0fe90da7634d7e13").unwrap()[..]).unwrap()).unwrap();
2493 assert_eq!(chan.their_funding_pubkey.serialize()[..],
2494 hex::decode("030e9f7b623d2ccc7c9bd44d66d5ce21ce504c0acf6385a132cec6d3c39fa711c1").unwrap()[..]);
2496 chan.their_htlc_basepoint = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&secp_ctx, &hex::decode("4444444444444444444444444444444444444444444444444444444444444444").unwrap()[..]).unwrap()).unwrap();
2497 assert_eq!(chan.their_htlc_basepoint.serialize()[..],
2498 hex::decode("032c0b7cf95324a07d05398b240174dc0c2be444d96b159aa6c7f7b1e668680991").unwrap()[..]);
2500 chan.their_revocation_basepoint = PublicKey::from_slice(&secp_ctx, &hex::decode("02466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f27").unwrap()[..]).unwrap();
2502 // We can't just use build_local_transaction_keys here as the per_commitment_secret is not
2503 // derived from a commitment_seed, so instead we copy it here and call
2504 // build_commitment_transaction.
2505 let delayed_payment_base = PublicKey::from_secret_key(&secp_ctx, &chan.local_keys.delayed_payment_base_key).unwrap();
2506 let per_commitment_secret = SecretKey::from_slice(&secp_ctx, &hex::decode("1f1e1d1c1b1a191817161514131211100f0e0d0c0b0a09080706050403020100").unwrap()[..]).unwrap();
2507 let per_commitment_point = PublicKey::from_secret_key(&secp_ctx, &per_commitment_secret).unwrap();
2508 let htlc_basepoint = PublicKey::from_secret_key(&secp_ctx, &chan.local_keys.htlc_base_key).unwrap();
2509 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();
2511 let mut unsigned_tx: (Transaction, Vec<HTLCOutputInCommitment>);
2513 macro_rules! test_commitment {
2514 ( $their_sig_hex: expr, $our_sig_hex: expr, $tx_hex: expr) => {
2515 unsigned_tx = chan.build_commitment_transaction(0xffffffffffff - 42, &keys, true, false);
2516 let their_signature = Signature::from_der(&secp_ctx, &hex::decode($their_sig_hex).unwrap()[..]).unwrap();
2517 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();
2518 secp_ctx.verify(&sighash, &their_signature, &chan.their_funding_pubkey).unwrap();
2520 chan.sign_commitment_transaction(&mut unsigned_tx.0, &their_signature);
2522 assert_eq!(serialize(&unsigned_tx.0).unwrap()[..],
2523 hex::decode($tx_hex).unwrap()[..]);
2527 macro_rules! test_htlc_output {
2528 ( $htlc_idx: expr, $their_sig_hex: expr, $our_sig_hex: expr, $tx_hex: expr ) => {
2529 let remote_signature = Signature::from_der(&secp_ctx, &hex::decode($their_sig_hex).unwrap()[..]).unwrap();
2531 let ref htlc = unsigned_tx.1[$htlc_idx];
2532 let mut htlc_tx = chan.build_htlc_transaction(&unsigned_tx.0.txid(), &htlc, true, &keys);
2533 let htlc_redeemscript = chan_utils::get_htlc_redeemscript(&htlc, &keys);
2534 let htlc_sighash = Message::from_slice(&bip143::SighashComponents::new(&htlc_tx).sighash_all(&htlc_tx.input[0], &htlc_redeemscript, htlc.amount_msat / 1000)[..]).unwrap();
2535 secp_ctx.verify(&htlc_sighash, &remote_signature, &keys.b_htlc_key).unwrap();
2537 let mut preimage: Option<[u8; 32]> = None;
2540 let mut sha = Sha256::new();
2541 sha.input(&[i; 32]);
2543 let mut out = [0; 32];
2544 sha.result(&mut out);
2546 if out == htlc.payment_hash {
2547 preimage = Some([i; 32]);
2551 assert!(preimage.is_some());
2554 chan.sign_htlc_transaction(&mut htlc_tx, &remote_signature, &preimage, &htlc, &keys).unwrap();
2555 assert_eq!(serialize(&htlc_tx).unwrap()[..],
2556 hex::decode($tx_hex).unwrap()[..]);
2561 // simple commitment tx with no HTLCs
2562 chan.value_to_self_msat = 7000000000;
2564 test_commitment!("3045022100f51d2e566a70ba740fc5d8c0f07b9b93d2ed741c3c0860c613173de7d39e7968022041376d520e9c0e1ad52248ddf4b22e12be8763007df977253ef45a4ca3bdb7c0",
2565 "3044022051b75c73198c6deee1a875871c3961832909acd297c6b908d59e3319e5185a46022055c419379c5051a78d00dbbce11b5b664a0c22815fbcc6fcef6b1937c3836939",
2566 "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");
2569 chan.pending_htlcs.push({
2570 let mut out = HTLCOutput{
2573 amount_msat: 1000000,
2575 payment_hash: [0; 32],
2576 state: HTLCState::Committed,
2578 local_removed_fulfilled: false,
2579 pending_forward_state: None,
2581 let mut sha = Sha256::new();
2582 sha.input(&hex::decode("0000000000000000000000000000000000000000000000000000000000000000").unwrap());
2583 sha.result(&mut out.payment_hash);
2586 chan.pending_htlcs.push({
2587 let mut out = HTLCOutput{
2590 amount_msat: 2000000,
2592 payment_hash: [0; 32],
2593 state: HTLCState::Committed,
2595 local_removed_fulfilled: false,
2596 pending_forward_state: None,
2598 let mut sha = Sha256::new();
2599 sha.input(&hex::decode("0101010101010101010101010101010101010101010101010101010101010101").unwrap());
2600 sha.result(&mut out.payment_hash);
2603 chan.pending_htlcs.push({
2604 let mut out = HTLCOutput{
2607 amount_msat: 2000000,
2609 payment_hash: [0; 32],
2610 state: HTLCState::Committed,
2612 local_removed_fulfilled: false,
2613 pending_forward_state: None,
2615 let mut sha = Sha256::new();
2616 sha.input(&hex::decode("0202020202020202020202020202020202020202020202020202020202020202").unwrap());
2617 sha.result(&mut out.payment_hash);
2620 chan.pending_htlcs.push({
2621 let mut out = HTLCOutput{
2624 amount_msat: 3000000,
2626 payment_hash: [0; 32],
2627 state: HTLCState::Committed,
2629 local_removed_fulfilled: false,
2630 pending_forward_state: None,
2632 let mut sha = Sha256::new();
2633 sha.input(&hex::decode("0303030303030303030303030303030303030303030303030303030303030303").unwrap());
2634 sha.result(&mut out.payment_hash);
2637 chan.pending_htlcs.push({
2638 let mut out = HTLCOutput{
2641 amount_msat: 4000000,
2643 payment_hash: [0; 32],
2644 state: HTLCState::Committed,
2646 local_removed_fulfilled: false,
2647 pending_forward_state: None,
2649 let mut sha = Sha256::new();
2650 sha.input(&hex::decode("0404040404040404040404040404040404040404040404040404040404040404").unwrap());
2651 sha.result(&mut out.payment_hash);
2656 // commitment tx with all five HTLCs untrimmed (minimum feerate)
2657 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
2658 chan.feerate_per_kw = 0;
2660 test_commitment!("304402204fd4928835db1ccdfc40f5c78ce9bd65249b16348df81f0c44328dcdefc97d630220194d3869c38bc732dd87d13d2958015e2fc16829e74cd4377f84d215c0b70606",
2661 "30440220275b0c325a5e9355650dc30c0eccfbc7efb23987c24b556b9dfdd40effca18d202206caceb2c067836c51f296740c7ae807ffcbfbf1dd3a0d56b6de9a5b247985f06",
2662 "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");
2664 assert_eq!(unsigned_tx.1.len(), 5);
2666 test_htlc_output!(0,
2667 "304402206a6e59f18764a5bf8d4fa45eebc591566689441229c918b480fb2af8cc6a4aeb02205248f273be447684b33e3c8d1d85a8e0ca9fa0bae9ae33f0527ada9c162919a6",
2668 "304402207cb324fa0de88f452ffa9389678127ebcf4cabe1dd848b8e076c1a1962bf34720220116ed922b12311bd602d67e60d2529917f21c5b82f25ff6506c0f87886b4dfd5",
2669 "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");
2671 test_htlc_output!(1,
2672 "3045022100d5275b3619953cb0c3b5aa577f04bc512380e60fa551762ce3d7a1bb7401cff9022037237ab0dac3fe100cde094e82e2bed9ba0ed1bb40154b48e56aa70f259e608b",
2673 "3045022100c89172099507ff50f4c925e6c5150e871fb6e83dd73ff9fbb72f6ce829a9633f02203a63821d9162e99f9be712a68f9e589483994feae2661e4546cd5b6cec007be5",
2674 "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");
2676 test_htlc_output!(2,
2677 "304402201b63ec807771baf4fdff523c644080de17f1da478989308ad13a58b51db91d360220568939d38c9ce295adba15665fa68f51d967e8ed14a007b751540a80b325f202",
2678 "3045022100def389deab09cee69eaa1ec14d9428770e45bcbe9feb46468ecf481371165c2f022015d2e3c46600b2ebba8dcc899768874cc6851fd1ecb3fffd15db1cc3de7e10da",
2679 "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");
2681 test_htlc_output!(3,
2682 "3045022100daee1808f9861b6c3ecd14f7b707eca02dd6bdfc714ba2f33bc8cdba507bb182022026654bf8863af77d74f51f4e0b62d461a019561bb12acb120d3f7195d148a554",
2683 "30440220643aacb19bbb72bd2b635bc3f7375481f5981bace78cdd8319b2988ffcc6704202203d27784ec8ad51ed3bd517a05525a5139bb0b755dd719e0054332d186ac08727",
2684 "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");
2686 test_htlc_output!(4,
2687 "304402207e0410e45454b0978a623f36a10626ef17b27d9ad44e2760f98cfa3efb37924f0220220bd8acd43ecaa916a80bd4f919c495a2c58982ce7c8625153f8596692a801d",
2688 "30440220549e80b4496803cbc4a1d09d46df50109f546d43fbbf86cd90b174b1484acd5402205f12a4f995cb9bded597eabfee195a285986aa6d93ae5bb72507ebc6a4e2349e",
2689 "020000000001018154ecccf11a5fb56c39654c4deb4d2296f83c69268280b94d021370c94e219704000000000000000001a00f0000000000002200204adb4e2f00643db396dd120d4e7dc17625f5f2c11a40d857accc862d6b7dd80e050047304402207e0410e45454b0978a623f36a10626ef17b27d9ad44e2760f98cfa3efb37924f0220220bd8acd43ecaa916a80bd4f919c495a2c58982ce7c8625153f8596692a801d014730440220549e80b4496803cbc4a1d09d46df50109f546d43fbbf86cd90b174b1484acd5402205f12a4f995cb9bded597eabfee195a285986aa6d93ae5bb72507ebc6a4e2349e012004040404040404040404040404040404040404040404040404040404040404048a76a91414011f7254d96b819c76986c277d115efce6f7b58763ac67210394854aa6eab5b2a8122cc726e9dded053a2184d88256816826d6231c068d4a5b7c8201208763a91418bc1a114ccf9c052d3d23e28d3b0a9d1227434288527c21030d417a46946384f88d5f3337267c5e579765875dc4daca813e21734b140639e752ae677502f801b175ac686800000000");
2693 // commitment tx with seven outputs untrimmed (maximum feerate)
2694 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
2695 chan.feerate_per_kw = 647;
2697 test_commitment!("3045022100a5c01383d3ec646d97e40f44318d49def817fcd61a0ef18008a665b3e151785502203e648efddd5838981ef55ec954be69c4a652d021e6081a100d034de366815e9b",
2698 "304502210094bfd8f5572ac0157ec76a9551b6c5216a4538c07cd13a51af4a54cb26fa14320220768efce8ce6f4a5efac875142ff19237c011343670adf9c7ac69704a120d1163",
2699 "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");
2701 assert_eq!(unsigned_tx.1.len(), 5);
2703 test_htlc_output!(0,
2704 "30440220385a5afe75632f50128cbb029ee95c80156b5b4744beddc729ad339c9ca432c802202ba5f48550cad3379ac75b9b4fedb86a35baa6947f16ba5037fb8b11ab343740",
2705 "304402205999590b8a79fa346e003a68fd40366397119b2b0cdf37b149968d6bc6fbcc4702202b1e1fb5ab7864931caed4e732c359e0fe3d86a548b557be2246efb1708d579a",
2706 "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");
2708 test_htlc_output!(1,
2709 "304402207ceb6678d4db33d2401fdc409959e57c16a6cb97a30261d9c61f29b8c58d34b90220084b4a17b4ca0e86f2d798b3698ca52de5621f2ce86f80bed79afa66874511b0",
2710 "304402207ff03eb0127fc7c6cae49cc29e2a586b98d1e8969cf4a17dfa50b9c2647720b902205e2ecfda2252956c0ca32f175080e75e4e390e433feb1f8ce9f2ba55648a1dac",
2711 "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");
2713 test_htlc_output!(2,
2714 "304402206a401b29a0dff0d18ec903502c13d83e7ec019450113f4a7655a4ce40d1f65ba0220217723a084e727b6ca0cc8b6c69c014a7e4a01fcdcba3e3993f462a3c574d833",
2715 "3045022100d50d067ca625d54e62df533a8f9291736678d0b86c28a61bb2a80cf42e702d6e02202373dde7e00218eacdafb9415fe0e1071beec1857d1af3c6a201a44cbc47c877",
2716 "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");
2718 test_htlc_output!(3,
2719 "30450221009b1c987ba599ee3bde1dbca776b85481d70a78b681a8d84206723e2795c7cac002207aac84ad910f8598c4d1c0ea2e3399cf6627a4e3e90131315bc9f038451ce39d",
2720 "3045022100db9dc65291077a52728c622987e9895b7241d4394d6dcb916d7600a3e8728c22022036ee3ee717ba0bb5c45ee84bc7bbf85c0f90f26ae4e4a25a6b4241afa8a3f1cb",
2721 "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");
2723 test_htlc_output!(4,
2724 "3045022100cc28030b59f0914f45b84caa983b6f8effa900c952310708c2b5b00781117022022027ba2ccdf94d03c6d48b327f183f6e28c8a214d089b9227f94ac4f85315274f0",
2725 "304402202d1a3c0d31200265d2a2def2753ead4959ae20b4083e19553acfffa5dfab60bf022020ede134149504e15b88ab261a066de49848411e15e70f9e6a5462aec2949f8f",
2726 "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");
2730 // commitment tx with six outputs untrimmed (minimum feerate)
2731 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
2732 chan.feerate_per_kw = 648;
2734 test_commitment!("3044022072714e2fbb93cdd1c42eb0828b4f2eff143f717d8f26e79d6ada4f0dcb681bbe02200911be4e5161dd6ebe59ff1c58e1997c4aea804f81db6b698821db6093d7b057",
2735 "3045022100a2270d5950c89ae0841233f6efea9c951898b301b2e89e0adbd2c687b9f32efa02207943d90f95b9610458e7c65a576e149750ff3accaacad004cd85e70b235e27de",
2736 "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");
2738 assert_eq!(unsigned_tx.1.len(), 4);
2740 test_htlc_output!(0,
2741 "3044022062ef2e77591409d60d7817d9bb1e71d3c4a2931d1a6c7c8307422c84f001a251022022dad9726b0ae3fe92bda745a06f2c00f92342a186d84518588cf65f4dfaada8",
2742 "3045022100a4c574f00411dd2f978ca5cdc1b848c311cd7849c087ad2f21a5bce5e8cc5ae90220090ae39a9bce2fb8bc879d7e9f9022df249f41e25e51f1a9bf6447a9eeffc098",
2743 "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");
2745 test_htlc_output!(1,
2746 "3045022100e968cbbb5f402ed389fdc7f6cd2a80ed650bb42c79aeb2a5678444af94f6c78502204b47a1cb24ab5b0b6fe69fe9cfc7dba07b9dd0d8b95f372c1d9435146a88f8d4",
2747 "304402207679cf19790bea76a733d2fa0672bd43ab455687a068f815a3d237581f57139a0220683a1a799e102071c206b207735ca80f627ab83d6616b4bcd017c5d79ef3e7d0",
2748 "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");
2750 test_htlc_output!(2,
2751 "3045022100aa91932e305292cf9969cc23502bbf6cef83a5df39c95ad04a707c4f4fed5c7702207099fc0f3a9bfe1e7683c0e9aa5e76c5432eb20693bf4cb182f04d383dc9c8c2",
2752 "304402200df76fea718745f3c529bac7fd37923e7309ce38b25c0781e4cf514dd9ef8dc802204172295739dbae9fe0474dcee3608e3433b4b2af3a2e6787108b02f894dcdda3",
2753 "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");
2755 test_htlc_output!(3,
2756 "3044022035cac88040a5bba420b1c4257235d5015309113460bc33f2853cd81ca36e632402202fc94fd3e81e9d34a9d01782a0284f3044370d03d60f3fc041e2da088d2de58f",
2757 "304402200daf2eb7afd355b4caf6fb08387b5f031940ea29d1a9f35071288a839c9039e4022067201b562456e7948616c13acb876b386b511599b58ac1d94d127f91c50463a6",
2758 "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");
2762 // commitment tx with six outputs untrimmed (maximum feerate)
2763 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
2764 chan.feerate_per_kw = 2069;
2766 test_commitment!("3044022001d55e488b8b035b2dd29d50b65b530923a416d47f377284145bc8767b1b6a75022019bb53ddfe1cefaf156f924777eaaf8fdca1810695a7d0a247ad2afba8232eb4",
2767 "304402203ca8f31c6a47519f83255dc69f1894d9a6d7476a19f498d31eaf0cd3a85eeb63022026fd92dc752b33905c4c838c528b692a8ad4ced959990b5d5ee2ff940fa90eea",
2768 "02000000000101bef67e4e2fb9ddeeb3461973cd4c62abb35050b1add772995b820b584a488489000000000038b02b8006d007000000000000220020403d394747cae42e98ff01734ad5c08f82ba123d3d9a620abda88989651e2ab5d007000000000000220020748eba944fedc8827f6b06bc44678f93c0f9e6078b35c6331ed31e75f8ce0c2db80b000000000000220020c20b5d1f8584fd90443e7b7b720136174fa4b9333c261d04dbbd012635c0f419a00f0000000000002200208c48d15160397c9731df9bc3b236656efb6665fbfe92b4a6878e88a499f741c4c0c62d0000000000160014ccf1af2f2aabee14bb40fa3851ab2301de84311077956a00000000002200204adb4e2f00643db396dd120d4e7dc17625f5f2c11a40d857accc862d6b7dd80e040047304402203ca8f31c6a47519f83255dc69f1894d9a6d7476a19f498d31eaf0cd3a85eeb63022026fd92dc752b33905c4c838c528b692a8ad4ced959990b5d5ee2ff940fa90eea01473044022001d55e488b8b035b2dd29d50b65b530923a416d47f377284145bc8767b1b6a75022019bb53ddfe1cefaf156f924777eaaf8fdca1810695a7d0a247ad2afba8232eb401475221023da092f6980e58d2c037173180e9a465476026ee50f96695963e8efe436f54eb21030e9f7b623d2ccc7c9bd44d66d5ce21ce504c0acf6385a132cec6d3c39fa711c152ae3e195220");
2770 assert_eq!(unsigned_tx.1.len(), 4);
2772 test_htlc_output!(0,
2773 "3045022100d1cf354de41c1369336cf85b225ed033f1f8982a01be503668df756a7e668b66022001254144fb4d0eecc61908fccc3388891ba17c5d7a1a8c62bdd307e5a513f992",
2774 "3044022056eb1af429660e45a1b0b66568cb8c4a3aa7e4c9c292d5d6c47f86ebf2c8838f022065c3ac4ebe980ca7a41148569be4ad8751b0a724a41405697ec55035dae66402",
2775 "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");
2777 test_htlc_output!(1,
2778 "3045022100d065569dcb94f090345402736385efeb8ea265131804beac06dd84d15dd2d6880220664feb0b4b2eb985fadb6ec7dc58c9334ea88ce599a9be760554a2d4b3b5d9f4",
2779 "3045022100914bb232cd4b2690ee3d6cb8c3713c4ac9c4fb925323068d8b07f67c8541f8d9022057152f5f1615b793d2d45aac7518989ae4fe970f28b9b5c77504799d25433f7f",
2780 "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");
2782 test_htlc_output!(2,
2783 "3045022100d4e69d363de993684eae7b37853c40722a4c1b4a7b588ad7b5d8a9b5006137a102207a069c628170ee34be5612747051bdcc087466dbaa68d5756ea81c10155aef18",
2784 "304402200e362443f7af830b419771e8e1614fc391db3a4eb799989abfc5ab26d6fcd032022039ab0cad1c14dfbe9446bf847965e56fe016e0cbcf719fd18c1bfbf53ecbd9f9",
2785 "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");
2787 test_htlc_output!(3,
2788 "30450221008ec888e36e4a4b3dc2ed6b823319855b2ae03006ca6ae0d9aa7e24bfc1d6f07102203b0f78885472a67ff4fe5916c0bb669487d659527509516fc3a08e87a2cc0a7c",
2789 "304402202c3e14282b84b02705dfd00a6da396c9fe8a8bcb1d3fdb4b20a4feba09440e8b02202b058b39aa9b0c865b22095edcd9ff1f71bbfe20aa4993755e54d042755ed0d5",
2790 "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");
2794 // commitment tx with five outputs untrimmed (minimum feerate)
2795 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
2796 chan.feerate_per_kw = 2070;
2798 test_commitment!("3045022100f2377f7a67b7fc7f4e2c0c9e3a7de935c32417f5668eda31ea1db401b7dc53030220415fdbc8e91d0f735e70c21952342742e25249b0d062d43efbfc564499f37526",
2799 "30440220443cb07f650aebbba14b8bc8d81e096712590f524c5991ac0ed3bbc8fd3bd0c7022028a635f548e3ca64b19b69b1ea00f05b22752f91daf0b6dab78e62ba52eb7fd0",
2800 "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");
2802 assert_eq!(unsigned_tx.1.len(), 3);
2804 test_htlc_output!(0,
2805 "3045022100eed143b1ee4bed5dc3cde40afa5db3e7354cbf9c44054b5f713f729356f08cf7022077161d171c2bbd9badf3c9934de65a4918de03bbac1450f715275f75b103f891",
2806 "3045022100a0d043ed533e7fb1911e0553d31a8e2f3e6de19dbc035257f29d747c5e02f1f5022030cd38d8e84282175d49c1ebe0470db3ebd59768cf40780a784e248a43904fb8",
2807 "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");
2809 test_htlc_output!(1,
2810 "3044022071e9357619fd8d29a411dc053b326a5224c5d11268070e88ecb981b174747c7a02202b763ae29a9d0732fa8836dd8597439460b50472183f420021b768981b4f7cf6",
2811 "3045022100adb1d679f65f96178b59f23ed37d3b70443118f345224a07ecb043eee2acc157022034d24524fe857144a3bcfff3065a9994d0a6ec5f11c681e49431d573e242612d",
2812 "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");
2814 test_htlc_output!(2,
2815 "3045022100c9458a4d2cbb741705577deb0a890e5cb90ee141be0400d3162e533727c9cb2102206edcf765c5dc5e5f9b976ea8149bf8607b5a0efb30691138e1231302b640d2a4",
2816 "304402200831422aa4e1ee6d55e0b894201770a8f8817a189356f2d70be76633ffa6a6f602200dd1b84a4855dc6727dd46c98daae43dfc70889d1ba7ef0087529a57c06e5e04",
2817 "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");
2821 // commitment tx with five outputs untrimmed (maximum feerate)
2822 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
2823 chan.feerate_per_kw = 2194;
2825 test_commitment!("3045022100d33c4e541aa1d255d41ea9a3b443b3b822ad8f7f86862638aac1f69f8f760577022007e2a18e6931ce3d3a804b1c78eda1de17dbe1fb7a95488c9a4ec86203953348",
2826 "304402203b1b010c109c2ecbe7feb2d259b9c4126bd5dc99ee693c422ec0a5781fe161ba0220571fe4e2c649dea9c7aaf7e49b382962f6a3494963c97d80fef9a430ca3f7061",
2827 "02000000000101bef67e4e2fb9ddeeb3461973cd4c62abb35050b1add772995b820b584a488489000000000038b02b8005d007000000000000220020403d394747cae42e98ff01734ad5c08f82ba123d3d9a620abda88989651e2ab5b80b000000000000220020c20b5d1f8584fd90443e7b7b720136174fa4b9333c261d04dbbd012635c0f419a00f0000000000002200208c48d15160397c9731df9bc3b236656efb6665fbfe92b4a6878e88a499f741c4c0c62d0000000000160014ccf1af2f2aabee14bb40fa3851ab2301de84311040966a00000000002200204adb4e2f00643db396dd120d4e7dc17625f5f2c11a40d857accc862d6b7dd80e040047304402203b1b010c109c2ecbe7feb2d259b9c4126bd5dc99ee693c422ec0a5781fe161ba0220571fe4e2c649dea9c7aaf7e49b382962f6a3494963c97d80fef9a430ca3f706101483045022100d33c4e541aa1d255d41ea9a3b443b3b822ad8f7f86862638aac1f69f8f760577022007e2a18e6931ce3d3a804b1c78eda1de17dbe1fb7a95488c9a4ec8620395334801475221023da092f6980e58d2c037173180e9a465476026ee50f96695963e8efe436f54eb21030e9f7b623d2ccc7c9bd44d66d5ce21ce504c0acf6385a132cec6d3c39fa711c152ae3e195220");
2829 assert_eq!(unsigned_tx.1.len(), 3);
2831 test_htlc_output!(0,
2832 "30450221009ed2f0a67f99e29c3c8cf45c08207b765980697781bb727fe0b1416de0e7622902206052684229bc171419ed290f4b615c943f819c0262414e43c5b91dcf72ddcf44",
2833 "3044022004ad5f04ae69c71b3b141d4db9d0d4c38d84009fb3cfeeae6efdad414487a9a0022042d3fe1388c1ff517d1da7fb4025663d372c14728ed52dc88608363450ff6a2f",
2834 "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");
2836 test_htlc_output!(1,
2837 "30440220155d3b90c67c33a8321996a9be5b82431b0c126613be751d400669da9d5c696702204318448bcd48824439d2c6a70be6e5747446be47ff45977cf41672bdc9b6b12d",
2838 "304402201707050c870c1f77cc3ed58d6d71bf281de239e9eabd8ef0955bad0d7fe38dcc02204d36d80d0019b3a71e646a08fa4a5607761d341ae8be371946ebe437c289c915",
2839 "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");
2841 test_htlc_output!(2,
2842 "3045022100a12a9a473ece548584aabdd051779025a5ed4077c4b7aa376ec7a0b1645e5a48022039490b333f53b5b3e2ddde1d809e492cba2b3e5fc3a436cd3ffb4cd3d500fa5a",
2843 "3045022100ff200bc934ab26ce9a559e998ceb0aee53bc40368e114ab9d3054d9960546e2802202496856ca163ac12c143110b6b3ac9d598df7254f2e17b3b94c3ab5301f4c3b0",
2844 "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");
2848 // commitment tx with four outputs untrimmed (minimum feerate)
2849 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
2850 chan.feerate_per_kw = 2195;
2852 test_commitment!("304402205e2f76d4657fb732c0dfc820a18a7301e368f5799e06b7828007633741bda6df0220458009ae59d0c6246065c419359e05eb2a4b4ef4a1b310cc912db44eb7924298",
2853 "304402203b12d44254244b8ff3bb4129b0920fd45120ab42f553d9976394b099d500c99e02205e95bb7a3164852ef0c48f9e0eaf145218f8e2c41251b231f03cbdc4f29a5429",
2854 "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");
2856 assert_eq!(unsigned_tx.1.len(), 2);
2858 test_htlc_output!(0,
2859 "3045022100a8a78fa1016a5c5c3704f2e8908715a3cef66723fb95f3132ec4d2d05cd84fb4022025ac49287b0861ec21932405f5600cbce94313dbde0e6c5d5af1b3366d8afbfc",
2860 "3045022100be6ae1977fd7b630a53623f3f25c542317ccfc2b971782802a4f1ef538eb22b402207edc4d0408f8f38fd3c7365d1cfc26511b7cd2d4fecd8b005fba3cd5bc704390",
2861 "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");
2863 test_htlc_output!(1,
2864 "3045022100e769cb156aa2f7515d126cef7a69968629620ce82afcaa9e210969de6850df4602200b16b3f3486a229a48aadde520dbee31ae340dbadaffae74fbb56681fef27b92",
2865 "30440220665b9cb4a978c09d1ca8977a534999bc8a49da624d0c5439451dd69cde1a003d022070eae0620f01f3c1bd029cc1488da13fb40fdab76f396ccd335479a11c5276d8",
2866 "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");
2870 // commitment tx with four outputs untrimmed (maximum feerate)
2871 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
2872 chan.feerate_per_kw = 3702;
2874 test_commitment!("3045022100c1a3b0b60ca092ed5080121f26a74a20cec6bdee3f8e47bae973fcdceb3eda5502207d467a9873c939bf3aa758014ae67295fedbca52412633f7e5b2670fc7c381c1",
2875 "304402200e930a43c7951162dc15a2b7344f48091c74c70f7024e7116e900d8bcfba861c022066fa6cbda3929e21daa2e7e16a4b948db7e8919ef978402360d1095ffdaff7b0",
2876 "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");
2878 assert_eq!(unsigned_tx.1.len(), 2);
2880 test_htlc_output!(0,
2881 "3045022100dfb73b4fe961b31a859b2bb1f4f15cabab9265016dd0272323dc6a9e85885c54022059a7b87c02861ee70662907f25ce11597d7b68d3399443a831ae40e777b76bdb",
2882 "304402202765b9c9ece4f127fa5407faf66da4c5ce2719cdbe47cd3175fc7d48b482e43d02205605125925e07bad1e41c618a4b434d72c88a164981c4b8af5eaf4ee9142ec3a",
2883 "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");
2885 test_htlc_output!(1,
2886 "3045022100ea9dc2a7c3c3640334dab733bb4e036e32a3106dc707b24227874fa4f7da746802204d672f7ac0fe765931a8df10b81e53a3242dd32bd9dc9331eb4a596da87954e9",
2887 "30440220048a41c660c4841693de037d00a407810389f4574b3286afb7bc392a438fa3f802200401d71fa87c64fe621b49ac07e3bf85157ac680acb977124da28652cc7f1a5c",
2888 "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");
2892 // commitment tx with three outputs untrimmed (minimum feerate)
2893 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
2894 chan.feerate_per_kw = 3703;
2896 test_commitment!("30450221008b7c191dd46893b67b628e618d2dc8e81169d38bade310181ab77d7c94c6675e02203b4dd131fd7c9deb299560983dcdc485545c98f989f7ae8180c28289f9e6bdb0",
2897 "3044022047305531dd44391dce03ae20f8735005c615eb077a974edb0059ea1a311857d602202e0ed6972fbdd1e8cb542b06e0929bc41b2ddf236e04cb75edd56151f4197506",
2898 "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");
2900 assert_eq!(unsigned_tx.1.len(), 1);
2902 test_htlc_output!(0,
2903 "3044022044f65cf833afdcb9d18795ca93f7230005777662539815b8a601eeb3e57129a902206a4bf3e53392affbba52640627defa8dc8af61c958c9e827b2798ab45828abdd",
2904 "3045022100b94d931a811b32eeb885c28ddcf999ae1981893b21dd1329929543fe87ce793002206370107fdd151c5f2384f9ceb71b3107c69c74c8ed5a28a94a4ab2d27d3b0724",
2905 "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");
2909 // commitment tx with three outputs untrimmed (maximum feerate)
2910 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
2911 chan.feerate_per_kw = 4914;
2913 test_commitment!("304402206d6cb93969d39177a09d5d45b583f34966195b77c7e585cf47ac5cce0c90cefb022031d71ae4e33a4e80df7f981d696fbdee517337806a3c7138b7491e2cbb077a0e",
2914 "304402206a2679efa3c7aaffd2a447fd0df7aba8792858b589750f6a1203f9259173198a022008d52a0e77a99ab533c36206cb15ad7aeb2aa72b93d4b571e728cb5ec2f6fe26",
2915 "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");
2917 assert_eq!(unsigned_tx.1.len(), 1);
2919 test_htlc_output!(0,
2920 "3045022100fcb38506bfa11c02874092a843d0cc0a8613c23b639832564a5f69020cb0f6ba02206508b9e91eaa001425c190c68ee5f887e1ad5b1b314002e74db9dbd9e42dbecf",
2921 "304502210086e76b460ddd3cea10525fba298405d3fe11383e56966a5091811368362f689a02200f72ee75657915e0ede89c28709acd113ede9e1b7be520e3bc5cda425ecd6e68",
2922 "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");
2926 // commitment tx with two outputs untrimmed (minimum feerate)
2927 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
2928 chan.feerate_per_kw = 4915;
2930 test_commitment!("304402200769ba89c7330dfa4feba447b6e322305f12ac7dac70ec6ba997ed7c1b598d0802204fe8d337e7fee781f9b7b1a06e580b22f4f79d740059560191d7db53f8765552",
2931 "3045022100a012691ba6cea2f73fa8bac37750477e66363c6d28813b0bb6da77c8eb3fb0270220365e99c51304b0b1a6ab9ea1c8500db186693e39ec1ad5743ee231b0138384b9",
2932 "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");
2934 assert_eq!(unsigned_tx.1.len(), 0);
2938 // commitment tx with two outputs untrimmed (maximum feerate)
2939 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
2940 chan.feerate_per_kw = 9651180;
2942 test_commitment!("3044022037f83ff00c8e5fb18ae1f918ffc24e54581775a20ff1ae719297ef066c71caa9022039c529cccd89ff6c5ed1db799614533844bd6d101da503761c45c713996e3bbd",
2943 "30440220514f977bf7edc442de8ce43ace9686e5ebdc0f893033f13e40fb46c8b8c6e1f90220188006227d175f5c35da0b092c57bea82537aed89f7778204dc5bacf4f29f2b9",
2944 "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");
2946 assert_eq!(unsigned_tx.1.len(), 0);
2950 // commitment tx with one output untrimmed (minimum feerate)
2951 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
2952 chan.feerate_per_kw = 9651181;
2954 test_commitment!("3044022064901950be922e62cbe3f2ab93de2b99f37cff9fc473e73e394b27f88ef0731d02206d1dfa227527b4df44a07599289e207d6fd9cca60c0365682dcd3deaf739567e",
2955 "3044022031a82b51bd014915fe68928d1abf4b9885353fb896cac10c3fdd88d7f9c7f2e00220716bda819641d2c63e65d3549b6120112e1aeaf1742eed94a471488e79e206b1",
2956 "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");
2958 assert_eq!(unsigned_tx.1.len(), 0);
2962 // commitment tx with fee greater than funder amount
2963 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
2964 chan.feerate_per_kw = 9651936;
2966 test_commitment!("3044022064901950be922e62cbe3f2ab93de2b99f37cff9fc473e73e394b27f88ef0731d02206d1dfa227527b4df44a07599289e207d6fd9cca60c0365682dcd3deaf739567e",
2967 "3044022031a82b51bd014915fe68928d1abf4b9885353fb896cac10c3fdd88d7f9c7f2e00220716bda819641d2c63e65d3549b6120112e1aeaf1742eed94a471488e79e206b1",
2968 "02000000000101bef67e4e2fb9ddeeb3461973cd4c62abb35050b1add772995b820b584a488489000000000038b02b8001c0c62d0000000000160014ccf1af2f2aabee14bb40fa3851ab2301de8431100400473044022031a82b51bd014915fe68928d1abf4b9885353fb896cac10c3fdd88d7f9c7f2e00220716bda819641d2c63e65d3549b6120112e1aeaf1742eed94a471488e79e206b101473044022064901950be922e62cbe3f2ab93de2b99f37cff9fc473e73e394b27f88ef0731d02206d1dfa227527b4df44a07599289e207d6fd9cca60c0365682dcd3deaf739567e01475221023da092f6980e58d2c037173180e9a465476026ee50f96695963e8efe436f54eb21030e9f7b623d2ccc7c9bd44d66d5ce21ce504c0acf6385a132cec6d3c39fa711c152ae3e195220");
2970 assert_eq!(unsigned_tx.1.len(), 0);
2975 fn test_per_commitment_secret_gen() {
2976 // Test vectors from BOLT 3 Appendix D:
2978 let mut seed = [0; 32];
2979 seed[0..32].clone_from_slice(&hex::decode("0000000000000000000000000000000000000000000000000000000000000000").unwrap());
2980 assert_eq!(chan_utils::build_commitment_secret(seed, 281474976710655),
2981 hex::decode("02a40c85b6f28da08dfdbe0926c53fab2de6d28c10301f8f7c4073d5e42e3148").unwrap()[..]);
2983 seed[0..32].clone_from_slice(&hex::decode("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF").unwrap());
2984 assert_eq!(chan_utils::build_commitment_secret(seed, 281474976710655),
2985 hex::decode("7cc854b54e3e0dcdb010d7a3fee464a9687be6e8db3be6854c475621e007a5dc").unwrap()[..]);
2987 assert_eq!(chan_utils::build_commitment_secret(seed, 0xaaaaaaaaaaa),
2988 hex::decode("56f4008fb007ca9acf0e15b054d5c9fd12ee06cea347914ddbaed70d1c13a528").unwrap()[..]);
2990 assert_eq!(chan_utils::build_commitment_secret(seed, 0x555555555555),
2991 hex::decode("9015daaeb06dba4ccc05b91b2f73bd54405f2be9f217fbacd3c5ac2e62327d31").unwrap()[..]);
2993 seed[0..32].clone_from_slice(&hex::decode("0101010101010101010101010101010101010101010101010101010101010101").unwrap());
2994 assert_eq!(chan_utils::build_commitment_secret(seed, 1),
2995 hex::decode("915c75942a26bb3a433a8ce2cb0427c29ec6c1775cfc78328b57f6ba7bfeaa9c").unwrap()[..]);
2999 fn test_key_derivation() {
3000 // Test vectors from BOLT 3 Appendix E:
3001 let secp_ctx = Secp256k1::new();
3003 let base_secret = SecretKey::from_slice(&secp_ctx, &hex::decode("000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f").unwrap()[..]).unwrap();
3004 let per_commitment_secret = SecretKey::from_slice(&secp_ctx, &hex::decode("1f1e1d1c1b1a191817161514131211100f0e0d0c0b0a09080706050403020100").unwrap()[..]).unwrap();
3006 let base_point = PublicKey::from_secret_key(&secp_ctx, &base_secret).unwrap();
3007 assert_eq!(base_point.serialize()[..], hex::decode("036d6caac248af96f6afa7f904f550253a0f3ef3f5aa2fe6838a95b216691468e2").unwrap()[..]);
3009 let per_commitment_point = PublicKey::from_secret_key(&secp_ctx, &per_commitment_secret).unwrap();
3010 assert_eq!(per_commitment_point.serialize()[..], hex::decode("025f7117a78150fe2ef97db7cfc83bd57b2e2c0d0dd25eaf467a4a1c2a45ce1486").unwrap()[..]);
3012 assert_eq!(chan_utils::derive_public_key(&secp_ctx, &per_commitment_point, &base_point).unwrap().serialize()[..],
3013 hex::decode("0235f2dbfaa89b57ec7b055afe29849ef7ddfeb1cefdb9ebdc43f5494984db29e5").unwrap()[..]);
3015 assert_eq!(chan_utils::derive_private_key(&secp_ctx, &per_commitment_point, &base_secret).unwrap(),
3016 SecretKey::from_slice(&secp_ctx, &hex::decode("cbced912d3b21bf196a766651e436aff192362621ce317704ea2f75d87e7be0f").unwrap()[..]).unwrap());
3018 assert_eq!(chan_utils::derive_public_revocation_key(&secp_ctx, &per_commitment_point, &base_point).unwrap().serialize()[..],
3019 hex::decode("02916e326636d19c33f13e8c0c3a03dd157f332f3e99c317c141dd865eb01f8ff0").unwrap()[..]);
3021 assert_eq!(chan_utils::derive_private_revocation_key(&secp_ctx, &per_commitment_secret, &base_secret).unwrap(),
3022 SecretKey::from_slice(&secp_ctx, &hex::decode("d09ffff62ddb2297ab000cc85bcb4283fdeb6aa052affbc9dddcf33b61078110").unwrap()[..]).unwrap());