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::{HandleError, MsgEncodable};
18 use ln::channelmonitor::ChannelMonitor;
19 use ln::channelmanager::{PendingForwardHTLCInfo, HTLCFailReason};
20 use ln::chan_utils::{TxCreationKeys,HTLCOutputInCommitment,HTLC_SUCCESS_TX_WEIGHT,HTLC_TIMEOUT_TX_WEIGHT};
22 use chain::chaininterface::{FeeEstimator,ConfirmationTarget};
23 use chain::transaction::OutPoint;
24 use util::{transaction_utils,rng};
25 use util::sha2::Sha256;
28 use std::default::Default;
30 use std::time::Instant;
32 pub struct ChannelKeys {
33 pub funding_key: SecretKey,
34 pub revocation_base_key: SecretKey,
35 pub payment_base_key: SecretKey,
36 pub delayed_payment_base_key: SecretKey,
37 pub htlc_base_key: SecretKey,
38 pub channel_close_key: SecretKey,
39 pub channel_monitor_claim_key: SecretKey,
40 pub commitment_seed: [u8; 32],
44 pub fn new_from_seed(seed: &[u8; 32]) -> Result<ChannelKeys, secp256k1::Error> {
45 let mut prk = [0; 32];
46 hkdf_extract(Sha256::new(), b"rust-lightning key gen salt", seed, &mut prk);
47 let secp_ctx = Secp256k1::without_caps();
49 let mut okm = [0; 32];
50 hkdf_expand(Sha256::new(), &prk, b"rust-lightning funding key info", &mut okm);
51 let funding_key = SecretKey::from_slice(&secp_ctx, &okm)?;
53 hkdf_expand(Sha256::new(), &prk, b"rust-lightning revocation base key info", &mut okm);
54 let revocation_base_key = SecretKey::from_slice(&secp_ctx, &okm)?;
56 hkdf_expand(Sha256::new(), &prk, b"rust-lightning payment base key info", &mut okm);
57 let payment_base_key = SecretKey::from_slice(&secp_ctx, &okm)?;
59 hkdf_expand(Sha256::new(), &prk, b"rust-lightning delayed payment base key info", &mut okm);
60 let delayed_payment_base_key = SecretKey::from_slice(&secp_ctx, &okm)?;
62 hkdf_expand(Sha256::new(), &prk, b"rust-lightning htlc base key info", &mut okm);
63 let htlc_base_key = SecretKey::from_slice(&secp_ctx, &okm)?;
65 hkdf_expand(Sha256::new(), &prk, b"rust-lightning channel close key info", &mut okm);
66 let channel_close_key = SecretKey::from_slice(&secp_ctx, &okm)?;
68 hkdf_expand(Sha256::new(), &prk, b"rust-lightning channel monitor claim key info", &mut okm);
69 let channel_monitor_claim_key = SecretKey::from_slice(&secp_ctx, &okm)?;
71 hkdf_expand(Sha256::new(), &prk, b"rust-lightning local commitment seed info", &mut okm);
74 funding_key: funding_key,
75 revocation_base_key: revocation_base_key,
76 payment_base_key: payment_base_key,
77 delayed_payment_base_key: delayed_payment_base_key,
78 htlc_base_key: htlc_base_key,
79 channel_close_key: channel_close_key,
80 channel_monitor_claim_key: channel_monitor_claim_key,
88 /// Added by remote, to be included in next local commitment tx.
90 /// Included in a received commitment_signed message (implying we've revoke_and_ack'ed it), but
91 /// the remote side hasn't yet revoked their previous state, which we need them to do before we
92 /// accept this HTLC. Implies AwaitingRemoteRevoke.
93 /// We also have not yet included this HTLC in a commitment_signed message, and are waiting on
94 /// a remote revoke_and_ack on a previous state before we can do so.
95 AwaitingRemoteRevokeToAnnounce,
96 /// Included in a received commitment_signed message (implying we've revoke_and_ack'ed it), but
97 /// the remote side hasn't yet revoked their previous state, which we need them to do before we
98 /// accept this HTLC. Implies AwaitingRemoteRevoke.
99 /// We have included this HTLC in our latest commitment_signed and are now just waiting on a
101 AwaitingAnnouncedRemoteRevoke,
102 /// Added by us and included in a commitment_signed (if we were AwaitingRemoteRevoke when we
103 /// created it we would have put it in the holding cell instead). When they next revoke_and_ack
104 /// we will promote to Committed (note that they may not accept it until the next time we
105 /// revoke, but we dont really care about that:
106 /// * they've revoked, so worst case we can announce an old state and get our (option on)
107 /// money back (though we wont), and,
108 /// * we'll send them a revoke when they send a commitment_signed, and since only they're
109 /// allowed to remove it, the "can only be removed once committed on both sides" requirement
110 /// doesn't matter to us and its up to them to enforce it, worst-case they jump ahead but
111 /// we'll never get out of sync).
114 /// Remote removed this (outbound) HTLC. We're waiting on their commitment_signed to finalize
115 /// the change (though they'll need to revoke before we fail the payment).
117 /// Remote removed this and sent a commitment_signed (implying we've revoke_and_ack'ed it), but
118 /// the remote side hasn't yet revoked their previous state, which we need them to do before we
119 /// can do any backwards failing. Implies AwaitingRemoteRevoke.
120 /// We also have not yet removed this HTLC in a commitment_signed message, and are waiting on a
121 /// remote revoke_and_ack on a previous state before we can do so.
122 AwaitingRemoteRevokeToRemove,
123 /// Remote removed this and sent a commitment_signed (implying we've revoke_and_ack'ed it), but
124 /// the remote side hasn't yet revoked their previous state, which we need them to do before we
125 /// can do any backwards failing. Implies AwaitingRemoteRevoke.
126 /// We have removed this HTLC in our latest commitment_signed and are now just waiting on a
127 /// revoke_and_ack to drop completely.
128 AwaitingRemovedRemoteRevoke,
129 /// Removed by us and a new commitment_signed was sent (if we were AwaitingRemoteRevoke when we
130 /// created it we would have put it in the holding cell instead). When they next revoke_and_ack
131 /// we'll promote to LocalRemovedAwaitingCommitment if we fulfilled, otherwise we'll drop at
133 /// Note that we have to keep an eye on the HTLC until we've received a broadcastable
134 /// commitment transaction without it as otherwise we'll have to force-close the channel to
135 /// claim it before the timeout (obviously doesn't apply to revoked HTLCs that we can't claim
138 /// Removed by us, sent a new commitment_signed and got a revoke_and_ack. Just waiting on an
139 /// updated local commitment transaction.
140 LocalRemovedAwaitingCommitment,
143 struct HTLCOutput { //TODO: Refactor into Outbound/InboundHTLCOutput (will save memory and fewer panics)
144 outbound: bool, // ie to an HTLC-Timeout transaction
148 payment_hash: [u8; 32],
150 /// If we're in a Remote* removed state, set if they failed, otherwise None
151 fail_reason: Option<HTLCFailReason>,
152 /// If we're in LocalRemoved*, set to true if we fulfilled the HTLC, and can claim money
153 local_removed_fulfilled: bool,
154 /// state pre-committed Remote* implies pending_forward_state, otherwise it must be None
155 pending_forward_state: Option<PendingForwardHTLCInfo>,
159 fn get_in_commitment(&self, offered: bool) -> HTLCOutputInCommitment {
160 HTLCOutputInCommitment {
162 amount_msat: self.amount_msat,
163 cltv_expiry: self.cltv_expiry,
164 payment_hash: self.payment_hash,
165 transaction_output_index: 0
170 /// See AwaitingRemoteRevoke ChannelState for more info
171 enum HTLCUpdateAwaitingACK {
176 payment_hash: [u8; 32],
177 onion_routing_packet: msgs::OnionPacket,
178 time_created: Instant, //TODO: Some kind of timeout thing-a-majig
181 payment_preimage: [u8; 32],
182 payment_hash: [u8; 32], // Only here for effecient duplicate detection
185 payment_hash: [u8; 32],
186 err_packet: msgs::OnionErrorPacket,
191 /// Implies we have (or are prepared to) send our open_channel/accept_channel message
192 OurInitSent = (1 << 0),
193 /// Implies we have received their open_channel/accept_channel message
194 TheirInitSent = (1 << 1),
195 /// We have sent funding_created and are awaiting a funding_signed to advance to FundingSent.
196 /// Note that this is nonsense for an inbound channel as we immediately generate funding_signed
197 /// upon receipt of funding_created, so simply skip this state.
199 /// Set when we have received/sent funding_created and funding_signed and are thus now waiting
200 /// on the funding transaction to confirm. The FundingLocked flags are set to indicate when we
201 /// and our counterparty consider the funding transaction confirmed.
203 /// Flag which can be set on FundingSent to indicate they sent us a funding_locked message.
204 /// Once both TheirFundingLocked and OurFundingLocked are set, state moves on to ChannelFunded.
205 TheirFundingLocked = (1 << 4),
206 /// Flag which can be set on FundingSent to indicate we sent them a funding_locked message.
207 /// Once both TheirFundingLocked and OurFundingLocked are set, state moves on to ChannelFunded.
208 OurFundingLocked = (1 << 5),
210 /// Flag which implies that we have sent a commitment_signed but are awaiting the responding
211 /// revoke_and_ack message. During this time period, we can't generate new commitment_signed
212 /// messages as then we will be unable to determine which HTLCs they included in their
213 /// revoke_and_ack implicit ACK, so instead we have to hold them away temporarily to be sent
215 /// Flag is set on ChannelFunded.
216 AwaitingRemoteRevoke = (1 << 7),
217 /// Flag which is set on ChannelFunded or FundingSent after receiving a shutdown message from
218 /// the remote end. If set, they may not add any new HTLCs to the channel, and we are expected
219 /// to respond with our own shutdown message when possible.
220 RemoteShutdownSent = (1 << 8),
221 /// Flag which is set on ChannelFunded or FundingSent after sending a shutdown message. At this
222 /// point, we may not add any new HTLCs to the channel.
223 /// TODO: Investigate some kind of timeout mechanism by which point the remote end must provide
224 /// us their shutdown.
225 LocalShutdownSent = (1 << 9),
226 /// We've successfully negotiated a closing_signed dance. At this point ChannelManager is about
227 /// to drop us, but we store this anyway.
228 ShutdownComplete = (1 << 10),
230 const BOTH_SIDES_SHUTDOWN_MASK: u32 = (ChannelState::LocalShutdownSent as u32 | ChannelState::RemoteShutdownSent as u32);
232 // TODO: We should refactor this to be an Inbound/OutboundChannel until initial setup handshaking
233 // has been completed, and then turn into a Channel to get compiler-time enforcement of things like
234 // calling channel_id() before we're set up or things like get_outbound_funding_signed on an
239 channel_id: [u8; 32],
241 channel_outbound: bool,
243 announce_publicly: bool,
244 channel_value_satoshis: u64,
246 local_keys: ChannelKeys,
248 // Our commitment numbers start at 2^48-1 and count down, whereas the ones used in transaction
249 // generation start at 0 and count up...this simplifies some parts of implementation at the
250 // cost of others, but should really just be changed.
252 cur_local_commitment_transaction_number: u64,
253 cur_remote_commitment_transaction_number: u64,
254 value_to_self_msat: u64, // Excluding all pending_htlcs, excluding fees
255 pending_htlcs: Vec<HTLCOutput>,
256 holding_cell_htlc_updates: Vec<HTLCUpdateAwaitingACK>,
257 next_local_htlc_id: u64,
258 next_remote_htlc_id: u64,
259 channel_update_count: u32,
263 // Used in ChannelManager's tests to send a revoked transaction
264 pub last_local_commitment_txn: Vec<Transaction>,
266 last_local_commitment_txn: Vec<Transaction>,
268 last_sent_closing_fee: Option<(u64, u64)>, // (feerate, fee)
270 /// The hash of the block in which the funding transaction reached our CONF_TARGET. We use this
271 /// to detect unconfirmation after a serialize-unserialize roudtrip where we may not see a full
272 /// series of block_connected/block_disconnected calls. Obviously this is not a guarantee as we
273 /// could miss the funding_tx_confirmed_in block as well, but it serves as a useful fallback.
274 funding_tx_confirmed_in: Sha256dHash,
275 short_channel_id: Option<u64>,
276 /// Used to deduplicate block_connected callbacks
277 last_block_connected: Sha256dHash,
278 funding_tx_confirmations: u64,
280 their_dust_limit_satoshis: u64,
281 our_dust_limit_satoshis: u64,
282 their_max_htlc_value_in_flight_msat: u64,
283 //get_our_max_htlc_value_in_flight_msat(): u64,
284 their_channel_reserve_satoshis: u64,
285 //get_our_channel_reserve_satoshis(): u64,
286 their_htlc_minimum_msat: u64,
287 our_htlc_minimum_msat: u64,
288 their_to_self_delay: u16,
289 //implied by BREAKDOWN_TIMEOUT: our_to_self_delay: u16,
290 their_max_accepted_htlcs: u16,
291 //implied by OUR_MAX_HTLCS: our_max_accepted_htlcs: u16,
293 their_funding_pubkey: PublicKey,
294 their_revocation_basepoint: PublicKey,
295 their_payment_basepoint: PublicKey,
296 their_delayed_payment_basepoint: PublicKey,
297 their_htlc_basepoint: PublicKey,
298 their_cur_commitment_point: PublicKey,
300 their_prev_commitment_point: Option<PublicKey>,
301 their_node_id: PublicKey,
303 their_shutdown_scriptpubkey: Option<Script>,
305 channel_monitor: ChannelMonitor,
308 const OUR_MAX_HTLCS: u16 = 5; //TODO
309 const CONF_TARGET: u32 = 12; //TODO: Should be much higher
310 /// Confirmation count threshold at which we close a channel. Ideally we'd keep the channel around
311 /// on ice until the funding transaction gets more confirmations, but the LN protocol doesn't
312 /// really allow for this, so instead we're stuck closing it out at that point.
313 const UNCONF_THRESHOLD: u32 = 6;
314 /// The amount of time we require our counterparty wait to claim their money (ie time between when
315 /// we, or our watchtower, must check for them having broadcast a theft transaction).
316 const BREAKDOWN_TIMEOUT: u16 = 6 * 24 * 7; //TODO?
317 /// The amount of time we're willing to wait to claim money back to us
318 const MAX_LOCAL_BREAKDOWN_TIMEOUT: u16 = 6 * 24 * 14;
319 const COMMITMENT_TX_BASE_WEIGHT: u64 = 724;
320 const COMMITMENT_TX_WEIGHT_PER_HTLC: u64 = 172;
321 const SPENDING_INPUT_FOR_A_OUTPUT_WEIGHT: u64 = 79; // prevout: 36, nSequence: 4, script len: 1, witness lengths: (3+1)/4, sig: 73/4, if-selector: 1, redeemScript: (6 ops + 2*33 pubkeys + 1*2 delay)/4
322 const B_OUTPUT_PLUS_SPENDING_INPUT_WEIGHT: u64 = 104; // prevout: 40, nSequence: 4, script len: 1, witness lengths: 3/4, sig: 73/4, pubkey: 33/4, output: 31 (TODO: Wrong? Useless?)
323 /// Maximmum `funding_satoshis` value, according to the BOLT #2 specification
325 pub const MAX_FUNDING_SATOSHIS: u64 = (1 << 24);
327 macro_rules! secp_call {
328 ( $res: expr, $err: expr ) => {
331 //TODO: make the error a parameter
332 Err(_) => return Err(HandleError{err: $err, action: Some(msgs::ErrorAction::DisconnectPeer{ msg: None })})
337 macro_rules! secp_derived_key {
339 secp_call!($res, "Derived invalid key, peer is maliciously selecting parameters")
343 // Convert constants + channel value to limits:
344 fn get_our_max_htlc_value_in_flight_msat(channel_value_satoshis: u64) -> u64 {
345 channel_value_satoshis * 1000 / 10 //TODO
348 /// Guaranteed to return a value no larger than channel_value_satoshis
349 fn get_our_channel_reserve_satoshis(channel_value_satoshis: u64) -> u64 {
350 cmp::min(channel_value_satoshis, 1000) //TODO
353 fn derive_our_dust_limit_satoshis(at_open_background_feerate: u64) -> u64 {
354 at_open_background_feerate * B_OUTPUT_PLUS_SPENDING_INPUT_WEIGHT / 1000 //TODO
357 fn derive_our_htlc_minimum_msat(_at_open_channel_feerate_per_kw: u64) -> u64 {
363 /// panics if channel_value_satoshis is >= `MAX_FUNDING_SATOSHIS`
364 pub fn new_outbound(fee_estimator: &FeeEstimator, chan_keys: ChannelKeys, their_node_id: PublicKey, channel_value_satoshis: u64, announce_publicly: bool, user_id: u64) -> Channel {
365 if channel_value_satoshis >= MAX_FUNDING_SATOSHIS {
366 panic!("funding value > 2^24");
369 let feerate = fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Normal);
370 let background_feerate = fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Background);
372 let secp_ctx = Secp256k1::new();
373 let our_channel_monitor_claim_key_hash = Hash160::from_data(&PublicKey::from_secret_key(&secp_ctx, &chan_keys.channel_monitor_claim_key).unwrap().serialize());
374 let our_channel_monitor_claim_script = Builder::new().push_opcode(opcodes::All::OP_PUSHBYTES_0).push_slice(&our_channel_monitor_claim_key_hash[..]).into_script();
375 let channel_monitor = ChannelMonitor::new(&chan_keys.revocation_base_key,
376 &PublicKey::from_secret_key(&secp_ctx, &chan_keys.delayed_payment_base_key).unwrap(),
377 &chan_keys.htlc_base_key,
378 BREAKDOWN_TIMEOUT, our_channel_monitor_claim_script);
383 channel_id: rng::rand_u832(),
384 channel_state: ChannelState::OurInitSent as u32,
385 channel_outbound: true,
387 announce_publicly: announce_publicly,
388 channel_value_satoshis: channel_value_satoshis,
390 local_keys: chan_keys,
391 cur_local_commitment_transaction_number: (1 << 48) - 1,
392 cur_remote_commitment_transaction_number: (1 << 48) - 1,
393 value_to_self_msat: channel_value_satoshis * 1000, //TODO: give them something on open? Parameterize it?
394 pending_htlcs: Vec::new(),
395 holding_cell_htlc_updates: Vec::new(),
396 next_local_htlc_id: 0,
397 next_remote_htlc_id: 0,
398 channel_update_count: 1,
400 last_local_commitment_txn: Vec::new(),
402 last_sent_closing_fee: None,
404 funding_tx_confirmed_in: Default::default(),
405 short_channel_id: None,
406 last_block_connected: Default::default(),
407 funding_tx_confirmations: 0,
409 feerate_per_kw: feerate,
410 their_dust_limit_satoshis: 0,
411 our_dust_limit_satoshis: Channel::derive_our_dust_limit_satoshis(background_feerate),
412 their_max_htlc_value_in_flight_msat: 0,
413 their_channel_reserve_satoshis: 0,
414 their_htlc_minimum_msat: 0,
415 our_htlc_minimum_msat: Channel::derive_our_htlc_minimum_msat(feerate),
416 their_to_self_delay: 0,
417 their_max_accepted_htlcs: 0,
419 their_funding_pubkey: PublicKey::new(),
420 their_revocation_basepoint: PublicKey::new(),
421 their_payment_basepoint: PublicKey::new(),
422 their_delayed_payment_basepoint: PublicKey::new(),
423 their_htlc_basepoint: PublicKey::new(),
424 their_cur_commitment_point: PublicKey::new(),
426 their_prev_commitment_point: None,
427 their_node_id: their_node_id,
429 their_shutdown_scriptpubkey: None,
431 channel_monitor: channel_monitor,
435 fn check_remote_fee(fee_estimator: &FeeEstimator, feerate_per_kw: u32) -> Result<(), HandleError> {
436 if (feerate_per_kw as u64) < fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Background) {
437 return Err(HandleError{err: "Peer's feerate much too low", action: Some(msgs::ErrorAction::DisconnectPeer{ msg: None })});
439 if (feerate_per_kw as u64) > fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::HighPriority) * 2 {
440 return Err(HandleError{err: "Peer's feerate much too high", action: Some(msgs::ErrorAction::DisconnectPeer{ msg: None })});
445 /// Creates a new channel from a remote sides' request for one.
446 /// Assumes chain_hash has already been checked and corresponds with what we expect!
447 /// Generally prefers to take the DisconnectPeer action on failure, as a notice to the sender
448 /// that we're rejecting the new channel.
449 pub fn new_from_req(fee_estimator: &FeeEstimator, chan_keys: ChannelKeys, their_node_id: PublicKey, msg: &msgs::OpenChannel, user_id: u64, require_announce: bool, allow_announce: bool) -> Result<Channel, HandleError> {
450 // Check sanity of message fields:
451 if msg.funding_satoshis >= MAX_FUNDING_SATOSHIS {
452 return Err(HandleError{err: "funding value > 2^24", action: Some(msgs::ErrorAction::DisconnectPeer{ msg: None })});
454 if msg.channel_reserve_satoshis > msg.funding_satoshis {
455 return Err(HandleError{err: "Bogus channel_reserve_satoshis", action: Some(msgs::ErrorAction::DisconnectPeer{ msg: None })});
457 if msg.push_msat > (msg.funding_satoshis - msg.channel_reserve_satoshis) * 1000 {
458 return Err(HandleError{err: "push_msat more than highest possible value", action: Some(msgs::ErrorAction::DisconnectPeer{ msg: None })});
460 if msg.dust_limit_satoshis > msg.funding_satoshis {
461 return Err(HandleError{err: "Peer never wants payout outputs?", action: Some(msgs::ErrorAction::DisconnectPeer{ msg: None })});
463 if msg.htlc_minimum_msat >= (msg.funding_satoshis - msg.channel_reserve_satoshis) * 1000 {
464 return Err(HandleError{err: "Minimum htlc value is full channel value", action: Some(msgs::ErrorAction::DisconnectPeer{ msg: None })});
466 Channel::check_remote_fee(fee_estimator, msg.feerate_per_kw)?;
467 if msg.to_self_delay > MAX_LOCAL_BREAKDOWN_TIMEOUT {
468 return Err(HandleError{err: "They wanted our payments to be delayed by a needlessly long period", action: Some(msgs::ErrorAction::DisconnectPeer{ msg: None })});
470 if msg.max_accepted_htlcs < 1 {
471 return Err(HandleError{err: "0 max_accpted_htlcs makes for a useless channel", action: Some(msgs::ErrorAction::DisconnectPeer{ msg: None })});
473 if (msg.channel_flags & 254) != 0 {
474 return Err(HandleError{err: "unknown channel_flags", action: Some(msgs::ErrorAction::DisconnectPeer{ msg: None })});
477 // Convert things into internal flags and prep our state:
479 let their_announce = if (msg.channel_flags & 1) == 1 { true } else { false };
480 if require_announce && !their_announce {
481 return Err(HandleError{err: "Peer tried to open unannounced channel, but we require public ones", action: Some(msgs::ErrorAction::IgnoreError) });
483 if !allow_announce && their_announce {
484 return Err(HandleError{err: "Peer tried to open announced channel, but we require private ones", action: Some(msgs::ErrorAction::IgnoreError) });
487 let background_feerate = fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Background);
489 let secp_ctx = Secp256k1::new();
490 let our_channel_monitor_claim_key_hash = Hash160::from_data(&PublicKey::from_secret_key(&secp_ctx, &chan_keys.channel_monitor_claim_key).unwrap().serialize());
491 let our_channel_monitor_claim_script = Builder::new().push_opcode(opcodes::All::OP_PUSHBYTES_0).push_slice(&our_channel_monitor_claim_key_hash[..]).into_script();
492 let mut channel_monitor = ChannelMonitor::new(&chan_keys.revocation_base_key,
493 &PublicKey::from_secret_key(&secp_ctx, &chan_keys.delayed_payment_base_key).unwrap(),
494 &chan_keys.htlc_base_key,
495 BREAKDOWN_TIMEOUT, our_channel_monitor_claim_script);
496 channel_monitor.set_their_htlc_base_key(&msg.htlc_basepoint);
497 channel_monitor.set_their_to_self_delay(msg.to_self_delay);
499 let mut chan = Channel {
502 channel_id: msg.temporary_channel_id,
503 channel_state: (ChannelState::OurInitSent as u32) | (ChannelState::TheirInitSent as u32),
504 channel_outbound: false,
506 announce_publicly: their_announce,
508 local_keys: chan_keys,
509 cur_local_commitment_transaction_number: (1 << 48) - 1,
510 cur_remote_commitment_transaction_number: (1 << 48) - 1,
511 value_to_self_msat: msg.push_msat,
512 pending_htlcs: Vec::new(),
513 holding_cell_htlc_updates: Vec::new(),
514 next_local_htlc_id: 0,
515 next_remote_htlc_id: 0,
516 channel_update_count: 1,
518 last_local_commitment_txn: Vec::new(),
520 last_sent_closing_fee: None,
522 funding_tx_confirmed_in: Default::default(),
523 short_channel_id: None,
524 last_block_connected: Default::default(),
525 funding_tx_confirmations: 0,
527 feerate_per_kw: msg.feerate_per_kw as u64,
528 channel_value_satoshis: msg.funding_satoshis,
529 their_dust_limit_satoshis: msg.dust_limit_satoshis,
530 our_dust_limit_satoshis: Channel::derive_our_dust_limit_satoshis(background_feerate),
531 their_max_htlc_value_in_flight_msat: cmp::min(msg.max_htlc_value_in_flight_msat, msg.funding_satoshis * 1000),
532 their_channel_reserve_satoshis: msg.channel_reserve_satoshis,
533 their_htlc_minimum_msat: msg.htlc_minimum_msat,
534 our_htlc_minimum_msat: Channel::derive_our_htlc_minimum_msat(msg.feerate_per_kw as u64),
535 their_to_self_delay: msg.to_self_delay,
536 their_max_accepted_htlcs: msg.max_accepted_htlcs,
538 their_funding_pubkey: msg.funding_pubkey,
539 their_revocation_basepoint: msg.revocation_basepoint,
540 their_payment_basepoint: msg.payment_basepoint,
541 their_delayed_payment_basepoint: msg.delayed_payment_basepoint,
542 their_htlc_basepoint: msg.htlc_basepoint,
543 their_cur_commitment_point: msg.first_per_commitment_point,
545 their_prev_commitment_point: None,
546 their_node_id: their_node_id,
548 their_shutdown_scriptpubkey: None,
550 channel_monitor: channel_monitor,
553 let obscure_factor = chan.get_commitment_transaction_number_obscure_factor();
554 chan.channel_monitor.set_commitment_obscure_factor(obscure_factor);
559 // Utilities to derive keys:
561 fn build_local_commitment_secret(&self, idx: u64) -> SecretKey {
562 let res = chan_utils::build_commitment_secret(self.local_keys.commitment_seed, idx);
563 SecretKey::from_slice(&self.secp_ctx, &res).unwrap()
566 // Utilities to build transactions:
568 fn get_commitment_transaction_number_obscure_factor(&self) -> u64 {
569 let mut sha = Sha256::new();
570 let our_payment_basepoint = PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.payment_base_key).unwrap();
572 if self.channel_outbound {
573 sha.input(&our_payment_basepoint.serialize());
574 sha.input(&self.their_payment_basepoint.serialize());
576 sha.input(&self.their_payment_basepoint.serialize());
577 sha.input(&our_payment_basepoint.serialize());
579 let mut res = [0; 32];
580 sha.result(&mut res);
582 ((res[26] as u64) << 5*8) |
583 ((res[27] as u64) << 4*8) |
584 ((res[28] as u64) << 3*8) |
585 ((res[29] as u64) << 2*8) |
586 ((res[30] as u64) << 1*8) |
587 ((res[31] as u64) << 0*8)
590 /// Transaction nomenclature is somewhat confusing here as there are many different cases - a
591 /// transaction is referred to as "a's transaction" implying that a will be able to broadcast
592 /// the transaction. Thus, b will generally be sending a signature over such a transaction to
593 /// a, and a can revoke the transaction by providing b the relevant per_commitment_secret. As
594 /// such, a transaction is generally the result of b increasing the amount paid to a (or adding
596 /// @local is used only to convert relevant internal structures which refer to remote vs local
597 /// to decide value of outputs and direction of HTLCs.
598 /// @generated_by_local is used to determine *which* HTLCs to include - noting that the HTLC
599 /// state may indicate that one peer has informed the other that they'd like to add an HTLC but
600 /// have not yet committed it. Such HTLCs will only be included in transactions which are being
601 /// generated by the peer which proposed adding the HTLCs, and thus we need to understand both
602 /// which peer generated this transaction and "to whom" this transaction flows.
604 fn build_commitment_transaction(&self, commitment_number: u64, keys: &TxCreationKeys, local: bool, generated_by_local: bool) -> (Transaction, Vec<HTLCOutputInCommitment>) {
605 let obscured_commitment_transaction_number = self.get_commitment_transaction_number_obscure_factor() ^ (0xffffffffffff - commitment_number);
608 let mut ins: Vec<TxIn> = Vec::new();
610 prev_hash: self.channel_monitor.get_funding_txo().unwrap().txid,
611 prev_index: self.channel_monitor.get_funding_txo().unwrap().index as u32,
612 script_sig: Script::new(),
613 sequence: ((0x80 as u32) << 8*3) | ((obscured_commitment_transaction_number >> 3*8) as u32),
619 let mut txouts: Vec<(TxOut, Option<HTLCOutputInCommitment>)> = Vec::with_capacity(self.pending_htlcs.len() + 2);
621 let dust_limit_satoshis = if local { self.our_dust_limit_satoshis } else { self.their_dust_limit_satoshis };
622 let mut remote_htlc_total_msat = 0;
623 let mut local_htlc_total_msat = 0;
624 let mut value_to_self_msat_offset = 0;
626 for ref htlc in self.pending_htlcs.iter() {
627 let include = match htlc.state {
628 HTLCState::RemoteAnnounced => !generated_by_local,
629 HTLCState::AwaitingRemoteRevokeToAnnounce => !generated_by_local,
630 HTLCState::AwaitingAnnouncedRemoteRevoke => true,
631 HTLCState::LocalAnnounced => generated_by_local,
632 HTLCState::Committed => true,
633 HTLCState::RemoteRemoved => generated_by_local,
634 HTLCState::AwaitingRemoteRevokeToRemove => generated_by_local,
635 HTLCState::AwaitingRemovedRemoteRevoke => false,
636 HTLCState::LocalRemoved => !generated_by_local,
637 HTLCState::LocalRemovedAwaitingCommitment => false,
641 if htlc.outbound == local { // "offered HTLC output"
642 if htlc.amount_msat / 1000 >= dust_limit_satoshis + (self.feerate_per_kw * HTLC_TIMEOUT_TX_WEIGHT / 1000) {
643 let htlc_in_tx = htlc.get_in_commitment(true);
645 script_pubkey: chan_utils::get_htlc_redeemscript(&htlc_in_tx, &keys).to_v0_p2wsh(),
646 value: htlc.amount_msat / 1000
647 }, Some(htlc_in_tx)));
650 if htlc.amount_msat / 1000 >= dust_limit_satoshis + (self.feerate_per_kw * HTLC_SUCCESS_TX_WEIGHT / 1000) {
651 let htlc_in_tx = htlc.get_in_commitment(false);
652 txouts.push((TxOut { // "received HTLC output"
653 script_pubkey: chan_utils::get_htlc_redeemscript(&htlc_in_tx, &keys).to_v0_p2wsh(),
654 value: htlc.amount_msat / 1000
655 }, Some(htlc_in_tx)));
659 local_htlc_total_msat += htlc.amount_msat;
661 remote_htlc_total_msat += htlc.amount_msat;
665 HTLCState::AwaitingRemoteRevokeToRemove|HTLCState::AwaitingRemovedRemoteRevoke => {
666 if generated_by_local && htlc.fail_reason.is_none() {
667 value_to_self_msat_offset -= htlc.amount_msat as i64;
670 HTLCState::RemoteRemoved => {
671 if !generated_by_local && htlc.fail_reason.is_none() {
672 value_to_self_msat_offset -= htlc.amount_msat as i64;
675 HTLCState::LocalRemoved => {
676 if generated_by_local && htlc.local_removed_fulfilled {
677 value_to_self_msat_offset += htlc.amount_msat as i64;
680 HTLCState::LocalRemovedAwaitingCommitment => {
681 value_to_self_msat_offset += htlc.amount_msat as i64;
688 let total_fee: u64 = self.feerate_per_kw * (COMMITMENT_TX_BASE_WEIGHT + (txouts.len() as u64) * COMMITMENT_TX_WEIGHT_PER_HTLC) / 1000;
689 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 };
690 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 };
692 let value_to_a = if local { value_to_self } else { value_to_remote };
693 let value_to_b = if local { value_to_remote } else { value_to_self };
695 if value_to_a >= (dust_limit_satoshis as i64) {
697 script_pubkey: chan_utils::get_revokeable_redeemscript(&keys.revocation_key,
698 if local { self.their_to_self_delay } else { BREAKDOWN_TIMEOUT },
699 &keys.a_delayed_payment_key).to_v0_p2wsh(),
700 value: value_to_a as u64
704 if value_to_b >= (dust_limit_satoshis as i64) {
706 script_pubkey: Builder::new().push_opcode(opcodes::All::OP_PUSHBYTES_0)
707 .push_slice(&Hash160::from_data(&keys.b_payment_key.serialize())[..])
709 value: value_to_b as u64
713 transaction_utils::sort_outputs(&mut txouts);
715 let mut outputs: Vec<TxOut> = Vec::with_capacity(txouts.len());
716 let mut htlcs_used: Vec<HTLCOutputInCommitment> = Vec::with_capacity(txouts.len());
717 for (idx, out) in txouts.drain(..).enumerate() {
719 if let Some(out_htlc) = out.1 {
720 htlcs_used.push(out_htlc);
721 htlcs_used.last_mut().unwrap().transaction_output_index = idx as u32;
727 lock_time: ((0x20 as u32) << 8*3) | ((obscured_commitment_transaction_number & 0xffffffu64) as u32),
734 fn get_closing_scriptpubkey(&self) -> Script {
735 let our_channel_close_key_hash = Hash160::from_data(&PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.channel_close_key).unwrap().serialize());
736 Builder::new().push_opcode(opcodes::All::OP_PUSHBYTES_0).push_slice(&our_channel_close_key_hash[..]).into_script()
740 fn get_closing_transaction_weight(a_scriptpubkey: &Script, b_scriptpubkey: &Script) -> u64 {
741 (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)
745 fn build_closing_transaction(&self, proposed_total_fee_satoshis: u64, skip_remote_output: bool) -> (Transaction, u64) {
747 let mut ins: Vec<TxIn> = Vec::new();
749 prev_hash: self.channel_monitor.get_funding_txo().unwrap().txid,
750 prev_index: self.channel_monitor.get_funding_txo().unwrap().index as u32,
751 script_sig: Script::new(),
752 sequence: 0xffffffff,
758 assert!(self.pending_htlcs.is_empty());
759 let mut txouts: Vec<(TxOut, ())> = Vec::new();
761 let mut total_fee_satoshis = proposed_total_fee_satoshis;
762 let value_to_self: i64 = (self.value_to_self_msat as i64) / 1000 - if self.channel_outbound { total_fee_satoshis as i64 } else { 0 };
763 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 };
765 if value_to_self < 0 {
766 assert!(self.channel_outbound);
767 total_fee_satoshis += (-value_to_self) as u64;
768 } else if value_to_remote < 0 {
769 assert!(!self.channel_outbound);
770 total_fee_satoshis += (-value_to_remote) as u64;
773 if !skip_remote_output && value_to_remote as u64 > self.our_dust_limit_satoshis {
775 script_pubkey: self.their_shutdown_scriptpubkey.clone().unwrap(),
776 value: value_to_remote as u64
780 if value_to_self as u64 > self.our_dust_limit_satoshis {
782 script_pubkey: self.get_closing_scriptpubkey(),
783 value: value_to_self as u64
787 transaction_utils::sort_outputs(&mut txouts);
789 let mut outputs: Vec<TxOut> = Vec::new();
790 for out in txouts.drain(..) {
799 }, total_fee_satoshis)
803 /// Creates a set of keys for build_commitment_transaction to generate a transaction which our
804 /// counterparty will sign (ie DO NOT send signatures over a transaction created by this to
805 /// our counterparty!)
806 /// The result is a transaction which we can revoke ownership of (ie a "local" transaction)
807 /// TODO Some magic rust shit to compile-time check this?
808 fn build_local_transaction_keys(&self, commitment_number: u64) -> Result<TxCreationKeys, HandleError> {
809 let per_commitment_point = PublicKey::from_secret_key(&self.secp_ctx, &self.build_local_commitment_secret(commitment_number)).unwrap();
810 let delayed_payment_base = PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.delayed_payment_base_key).unwrap();
811 let htlc_basepoint = PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.htlc_base_key).unwrap();
813 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)))
817 /// Creates a set of keys for build_commitment_transaction to generate a transaction which we
818 /// will sign and send to our counterparty.
819 fn build_remote_transaction_keys(&self) -> Result<TxCreationKeys, HandleError> {
820 //TODO: Ensure that the payment_key derived here ends up in the library users' wallet as we
821 //may see payments to it!
822 let payment_basepoint = PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.payment_base_key).unwrap();
823 let revocation_basepoint = PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.revocation_base_key).unwrap();
824 let htlc_basepoint = PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.htlc_base_key).unwrap();
826 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)))
829 /// Gets the redeemscript for the funding transaction output (ie the funding transaction output
830 /// pays to get_funding_redeemscript().to_v0_p2wsh()).
831 pub fn get_funding_redeemscript(&self) -> Script {
832 let builder = Builder::new().push_opcode(opcodes::All::OP_PUSHNUM_2);
833 let our_funding_key = PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.funding_key).unwrap().serialize();
834 let their_funding_key = self.their_funding_pubkey.serialize();
835 if our_funding_key[..] < their_funding_key[..] {
836 builder.push_slice(&our_funding_key)
837 .push_slice(&their_funding_key)
839 builder.push_slice(&their_funding_key)
840 .push_slice(&our_funding_key)
841 }.push_opcode(opcodes::All::OP_PUSHNUM_2).push_opcode(opcodes::All::OP_CHECKMULTISIG).into_script()
844 fn sign_commitment_transaction(&self, tx: &mut Transaction, their_sig: &Signature) -> Signature {
845 if tx.input.len() != 1 {
846 panic!("Tried to sign commitment transaction that had input count != 1!");
848 if tx.input[0].witness.len() != 0 {
849 panic!("Tried to re-sign commitment transaction");
852 let funding_redeemscript = self.get_funding_redeemscript();
854 let sighash = Message::from_slice(&bip143::SighashComponents::new(&tx).sighash_all(&tx.input[0], &funding_redeemscript, self.channel_value_satoshis)[..]).unwrap();
855 let our_sig = self.secp_ctx.sign(&sighash, &self.local_keys.funding_key).unwrap();
857 tx.input[0].witness.push(Vec::new()); // First is the multisig dummy
859 let our_funding_key = PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.funding_key).unwrap().serialize();
860 let their_funding_key = self.their_funding_pubkey.serialize();
861 if our_funding_key[..] < their_funding_key[..] {
862 tx.input[0].witness.push(our_sig.serialize_der(&self.secp_ctx).to_vec());
863 tx.input[0].witness.push(their_sig.serialize_der(&self.secp_ctx).to_vec());
865 tx.input[0].witness.push(their_sig.serialize_der(&self.secp_ctx).to_vec());
866 tx.input[0].witness.push(our_sig.serialize_der(&self.secp_ctx).to_vec());
868 tx.input[0].witness[1].push(SigHashType::All as u8);
869 tx.input[0].witness[2].push(SigHashType::All as u8);
871 tx.input[0].witness.push(funding_redeemscript.into_vec());
876 /// Builds the htlc-success or htlc-timeout transaction which spends a given HTLC output
877 /// @local is used only to convert relevant internal structures which refer to remote vs local
878 /// to decide value of outputs and direction of HTLCs.
879 fn build_htlc_transaction(&self, prev_hash: &Sha256dHash, htlc: &HTLCOutputInCommitment, local: bool, keys: &TxCreationKeys) -> Transaction {
880 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)
883 fn create_htlc_tx_signature(&self, tx: &Transaction, htlc: &HTLCOutputInCommitment, keys: &TxCreationKeys) -> Result<(Script, Signature, bool), HandleError> {
884 if tx.input.len() != 1 {
885 panic!("Tried to sign HTLC transaction that had input count != 1!");
888 let htlc_redeemscript = chan_utils::get_htlc_redeemscript(&htlc, &keys);
890 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));
891 let sighash = Message::from_slice(&bip143::SighashComponents::new(&tx).sighash_all(&tx.input[0], &htlc_redeemscript, htlc.amount_msat / 1000)[..]).unwrap();
892 let is_local_tx = PublicKey::from_secret_key(&self.secp_ctx, &our_htlc_key).unwrap() == keys.a_htlc_key;
893 Ok((htlc_redeemscript, self.secp_ctx.sign(&sighash, &our_htlc_key).unwrap(), is_local_tx))
896 /// Signs a transaction created by build_htlc_transaction. If the transaction is an
897 /// HTLC-Success transaction (ie htlc.offered is false), preimate must be set!
898 fn sign_htlc_transaction(&self, tx: &mut Transaction, their_sig: &Signature, preimage: &Option<[u8; 32]>, htlc: &HTLCOutputInCommitment, keys: &TxCreationKeys) -> Result<Signature, HandleError> {
899 if tx.input.len() != 1 {
900 panic!("Tried to sign HTLC transaction that had input count != 1!");
902 if tx.input[0].witness.len() != 0 {
903 panic!("Tried to re-sign HTLC transaction");
906 let (htlc_redeemscript, our_sig, local_tx) = self.create_htlc_tx_signature(tx, htlc, keys)?;
908 tx.input[0].witness.push(Vec::new()); // First is the multisig dummy
910 if local_tx { // b, then a
911 tx.input[0].witness.push(their_sig.serialize_der(&self.secp_ctx).to_vec());
912 tx.input[0].witness.push(our_sig.serialize_der(&self.secp_ctx).to_vec());
914 tx.input[0].witness.push(our_sig.serialize_der(&self.secp_ctx).to_vec());
915 tx.input[0].witness.push(their_sig.serialize_der(&self.secp_ctx).to_vec());
917 tx.input[0].witness[1].push(SigHashType::All as u8);
918 tx.input[0].witness[2].push(SigHashType::All as u8);
921 tx.input[0].witness.push(Vec::new());
923 tx.input[0].witness.push(preimage.unwrap().to_vec());
926 tx.input[0].witness.push(htlc_redeemscript.into_vec());
931 fn get_update_fulfill_htlc(&mut self, payment_preimage_arg: [u8; 32]) -> Result<(Option<msgs::UpdateFulfillHTLC>, Option<ChannelMonitor>), HandleError> {
932 // Either ChannelFunded got set (which means it wont bet unset) or there is no way any
933 // caller thought we could have something claimed (cause we wouldn't have accepted in an
934 // incoming HTLC anyway). If we got to ShutdownComplete, callers aren't allowed to call us,
936 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
937 panic!("Was asked to fulfill an HTLC when channel was not in an operational state");
939 assert_eq!(self.channel_state & ChannelState::ShutdownComplete as u32, 0);
941 let mut sha = Sha256::new();
942 sha.input(&payment_preimage_arg);
943 let mut payment_hash_calc = [0; 32];
944 sha.result(&mut payment_hash_calc);
946 let mut pending_idx = std::usize::MAX;
947 for (idx, htlc) in self.pending_htlcs.iter().enumerate() {
948 if !htlc.outbound && htlc.payment_hash == payment_hash_calc {
949 if pending_idx != std::usize::MAX {
950 panic!("Duplicate HTLC payment_hash, you probably re-used payment preimages, NEVER DO THIS!");
955 if pending_idx == std::usize::MAX {
956 return Err(HandleError{err: "Unable to find a pending HTLC which matched the given payment preimage", action: None});
959 // Now update local state:
961 // We have to put the payment_preimage in the channel_monitor right away here to ensure we
962 // can claim it even if the channel hits the chain before we see their next commitment.
963 self.channel_monitor.provide_payment_preimage(&payment_hash_calc, &payment_preimage_arg);
965 if (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32)) == (ChannelState::AwaitingRemoteRevoke as u32) {
966 for pending_update in self.holding_cell_htlc_updates.iter() {
967 match pending_update {
968 &HTLCUpdateAwaitingACK::ClaimHTLC { ref payment_preimage, .. } => {
969 if payment_preimage_arg == *payment_preimage {
970 return Ok((None, None));
973 &HTLCUpdateAwaitingACK::FailHTLC { ref payment_hash, .. } => {
974 if payment_hash_calc == *payment_hash {
975 return Err(HandleError{err: "Unable to find a pending HTLC which matched the given payment preimage", action: None});
981 self.holding_cell_htlc_updates.push(HTLCUpdateAwaitingACK::ClaimHTLC {
982 payment_preimage: payment_preimage_arg, payment_hash: payment_hash_calc,
984 return Ok((None, Some(self.channel_monitor.clone())));
988 let mut htlc = &mut self.pending_htlcs[pending_idx];
989 if htlc.state == HTLCState::Committed {
990 htlc.state = HTLCState::LocalRemoved;
991 htlc.local_removed_fulfilled = true;
992 } else if htlc.state == HTLCState::RemoteAnnounced {
993 panic!("Somehow forwarded HTLC prior to remote revocation!");
994 } else if htlc.state == HTLCState::LocalRemoved || htlc.state == HTLCState::LocalRemovedAwaitingCommitment {
995 return Err(HandleError{err: "Unable to find a pending HTLC which matched the given payment preimage", action: None});
997 panic!("Have an inbound HTLC when not awaiting remote revoke that had a garbage state");
1002 Ok((Some(msgs::UpdateFulfillHTLC {
1003 channel_id: self.channel_id(),
1005 payment_preimage: payment_preimage_arg,
1006 }), Some(self.channel_monitor.clone())))
1009 pub fn get_update_fulfill_htlc_and_commit(&mut self, payment_preimage: [u8; 32]) -> Result<(Option<(msgs::UpdateFulfillHTLC, msgs::CommitmentSigned)>, Option<ChannelMonitor>), HandleError> {
1010 match self.get_update_fulfill_htlc(payment_preimage)? {
1011 (Some(update_fulfill_htlc), _) => {
1012 let (commitment, monitor_update) = self.send_commitment_no_status_check()?;
1013 Ok((Some((update_fulfill_htlc, commitment)), Some(monitor_update)))
1015 (None, Some(channel_monitor)) => Ok((None, Some(channel_monitor))),
1016 (None, None) => Ok((None, None))
1020 pub fn get_update_fail_htlc(&mut self, payment_hash_arg: &[u8; 32], err_packet: msgs::OnionErrorPacket) -> Result<Option<msgs::UpdateFailHTLC>, HandleError> {
1021 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
1022 return Err(HandleError{err: "Was asked to fail an HTLC when channel was not in an operational state", action: None});
1024 assert_eq!(self.channel_state & ChannelState::ShutdownComplete as u32, 0);
1026 // Now update local state:
1027 if (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32)) == (ChannelState::AwaitingRemoteRevoke as u32) {
1028 for pending_update in self.holding_cell_htlc_updates.iter() {
1029 match pending_update {
1030 &HTLCUpdateAwaitingACK::ClaimHTLC { ref payment_hash, .. } => {
1031 if *payment_hash_arg == *payment_hash {
1032 return Err(HandleError{err: "Unable to find a pending HTLC which matched the given payment preimage", action: None});
1035 &HTLCUpdateAwaitingACK::FailHTLC { ref payment_hash, .. } => {
1036 if *payment_hash_arg == *payment_hash {
1043 self.holding_cell_htlc_updates.push(HTLCUpdateAwaitingACK::FailHTLC {
1044 payment_hash: payment_hash_arg.clone(),
1050 let mut htlc_id = 0;
1051 let mut htlc_amount_msat = 0;
1052 for htlc in self.pending_htlcs.iter_mut() {
1053 if !htlc.outbound && htlc.payment_hash == *payment_hash_arg {
1055 panic!("Duplicate HTLC payment_hash, you probably re-used payment preimages, NEVER DO THIS!");
1057 htlc_id = htlc.htlc_id;
1058 htlc_amount_msat += htlc.amount_msat;
1059 if htlc.state == HTLCState::Committed {
1060 htlc.state = HTLCState::LocalRemoved;
1061 } else if htlc.state == HTLCState::RemoteAnnounced {
1062 panic!("Somehow forwarded HTLC prior to remote revocation!");
1063 } else if htlc.state == HTLCState::LocalRemoved || htlc.state == HTLCState::LocalRemovedAwaitingCommitment {
1064 return Err(HandleError{err: "Unable to find a pending HTLC which matched the given payment preimage", action: None});
1066 panic!("Have an inbound HTLC when not awaiting remote revoke that had a garbage state");
1070 if htlc_amount_msat == 0 {
1071 return Err(HandleError{err: "Unable to find a pending HTLC which matched the given payment preimage", action: None});
1074 Ok(Some(msgs::UpdateFailHTLC {
1075 channel_id: self.channel_id(),
1081 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> {
1082 match self.get_update_fail_htlc(payment_hash, err_packet)? {
1083 Some(update_fail_htlc) => {
1084 let (commitment, monitor_update) = self.send_commitment_no_status_check()?;
1085 Ok(Some((update_fail_htlc, commitment, monitor_update)))
1091 // Message handlers:
1093 pub fn accept_channel(&mut self, msg: &msgs::AcceptChannel) -> Result<(), HandleError> {
1094 // Check sanity of message fields:
1095 if !self.channel_outbound {
1096 return Err(HandleError{err: "Got an accept_channel message from an inbound peer", action: None});
1098 if self.channel_state != ChannelState::OurInitSent as u32 {
1099 return Err(HandleError{err: "Got an accept_channel message at a strange time", action: None});
1101 if msg.dust_limit_satoshis > 21000000 * 100000000 {
1102 return Err(HandleError{err: "Peer never wants payout outputs?", action: None});
1104 if msg.channel_reserve_satoshis > self.channel_value_satoshis {
1105 return Err(HandleError{err: "Bogus channel_reserve_satoshis", action: None});
1107 if msg.htlc_minimum_msat >= (self.channel_value_satoshis - msg.channel_reserve_satoshis) * 1000 {
1108 return Err(HandleError{err: "Minimum htlc value is full channel value", action: None});
1110 //TODO do something with minimum_depth
1111 if msg.to_self_delay > MAX_LOCAL_BREAKDOWN_TIMEOUT {
1112 return Err(HandleError{err: "They wanted our payments to be delayed by a needlessly long period", action: None});
1114 if msg.max_accepted_htlcs < 1 {
1115 return Err(HandleError{err: "0 max_accpted_htlcs makes for a useless channel", action: None});
1118 self.channel_monitor.set_their_htlc_base_key(&msg.htlc_basepoint);
1120 self.their_dust_limit_satoshis = msg.dust_limit_satoshis;
1121 self.their_max_htlc_value_in_flight_msat = cmp::min(msg.max_htlc_value_in_flight_msat, self.channel_value_satoshis * 1000);
1122 self.their_channel_reserve_satoshis = msg.channel_reserve_satoshis;
1123 self.their_htlc_minimum_msat = msg.htlc_minimum_msat;
1124 self.their_to_self_delay = msg.to_self_delay;
1125 self.their_max_accepted_htlcs = msg.max_accepted_htlcs;
1126 self.their_funding_pubkey = msg.funding_pubkey;
1127 self.their_revocation_basepoint = msg.revocation_basepoint;
1128 self.their_payment_basepoint = msg.payment_basepoint;
1129 self.their_delayed_payment_basepoint = msg.delayed_payment_basepoint;
1130 self.their_htlc_basepoint = msg.htlc_basepoint;
1131 self.their_cur_commitment_point = msg.first_per_commitment_point;
1133 let obscure_factor = self.get_commitment_transaction_number_obscure_factor();
1134 self.channel_monitor.set_commitment_obscure_factor(obscure_factor);
1135 self.channel_monitor.set_their_to_self_delay(msg.to_self_delay);
1137 self.channel_state = ChannelState::OurInitSent as u32 | ChannelState::TheirInitSent as u32;
1142 fn funding_created_signature(&mut self, sig: &Signature) -> Result<(Transaction, Signature), HandleError> {
1143 let funding_script = self.get_funding_redeemscript();
1145 let remote_keys = self.build_remote_transaction_keys()?;
1146 let remote_initial_commitment_tx = self.build_commitment_transaction(self.cur_remote_commitment_transaction_number, &remote_keys, false, false).0;
1147 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();
1149 let local_keys = self.build_local_transaction_keys(self.cur_local_commitment_transaction_number)?;
1150 let local_initial_commitment_tx = self.build_commitment_transaction(self.cur_local_commitment_transaction_number, &local_keys, true, false).0;
1151 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();
1153 // They sign the "local" commitment transaction, allowing us to broadcast the tx if we wish.
1154 secp_call!(self.secp_ctx.verify(&local_sighash, &sig, &self.their_funding_pubkey), "Invalid funding_created signature from peer");
1156 // We sign the "remote" commitment transaction, allowing them to broadcast the tx if they wish.
1157 Ok((remote_initial_commitment_tx, self.secp_ctx.sign(&remote_sighash, &self.local_keys.funding_key).unwrap()))
1160 pub fn funding_created(&mut self, msg: &msgs::FundingCreated) -> Result<(msgs::FundingSigned, ChannelMonitor), HandleError> {
1161 if self.channel_outbound {
1162 return Err(HandleError{err: "Received funding_created for an outbound channel?", action: None});
1164 if self.channel_state != (ChannelState::OurInitSent as u32 | ChannelState::TheirInitSent as u32) {
1165 return Err(HandleError{err: "Received funding_created after we got the channel!", action: None});
1167 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 {
1168 panic!("Should not have advanced channel commitment tx numbers prior to funding_created");
1171 let funding_txo = OutPoint::new(msg.funding_txid, msg.funding_output_index);
1172 let funding_txo_script = self.get_funding_redeemscript().to_v0_p2wsh();
1173 self.channel_monitor.set_funding_info((funding_txo, funding_txo_script));
1175 let (remote_initial_commitment_tx, our_signature) = match self.funding_created_signature(&msg.signature) {
1178 self.channel_monitor.unset_funding_info();
1183 // Now that we're past error-generating stuff, update our local state:
1185 self.channel_monitor.provide_latest_remote_commitment_tx_info(&remote_initial_commitment_tx, Vec::new(), self.cur_remote_commitment_transaction_number);
1186 self.channel_state = ChannelState::FundingSent as u32;
1187 self.channel_id = funding_txo.to_channel_id();
1188 self.cur_remote_commitment_transaction_number -= 1;
1189 self.cur_local_commitment_transaction_number -= 1;
1191 Ok((msgs::FundingSigned {
1192 channel_id: self.channel_id,
1193 signature: our_signature
1194 }, self.channel_monitor.clone()))
1197 /// Handles a funding_signed message from the remote end.
1198 /// If this call is successful, broadcast the funding transaction (and not before!)
1199 pub fn funding_signed(&mut self, msg: &msgs::FundingSigned) -> Result<ChannelMonitor, HandleError> {
1200 if !self.channel_outbound {
1201 return Err(HandleError{err: "Received funding_signed for an inbound channel?", action: None});
1203 if self.channel_state != ChannelState::FundingCreated as u32 {
1204 return Err(HandleError{err: "Received funding_signed in strange state!", action: None});
1206 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 {
1207 panic!("Should not have advanced channel commitment tx numbers prior to funding_created");
1210 let funding_script = self.get_funding_redeemscript();
1212 let local_keys = self.build_local_transaction_keys(self.cur_local_commitment_transaction_number)?;
1213 let mut local_initial_commitment_tx = self.build_commitment_transaction(self.cur_local_commitment_transaction_number, &local_keys, true, false).0;
1214 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();
1216 // They sign the "local" commitment transaction, allowing us to broadcast the tx if we wish.
1217 secp_call!(self.secp_ctx.verify(&local_sighash, &msg.signature, &self.their_funding_pubkey), "Invalid funding_signed signature from peer");
1219 self.sign_commitment_transaction(&mut local_initial_commitment_tx, &msg.signature);
1220 self.channel_monitor.provide_latest_local_commitment_tx_info(local_initial_commitment_tx.clone(), local_keys, self.feerate_per_kw, Vec::new());
1221 self.last_local_commitment_txn = vec![local_initial_commitment_tx];
1222 self.channel_state = ChannelState::FundingSent as u32;
1223 self.cur_local_commitment_transaction_number -= 1;
1225 Ok(self.channel_monitor.clone())
1228 pub fn funding_locked(&mut self, msg: &msgs::FundingLocked) -> Result<(), HandleError> {
1229 let non_shutdown_state = self.channel_state & (!BOTH_SIDES_SHUTDOWN_MASK);
1230 if non_shutdown_state == ChannelState::FundingSent as u32 {
1231 self.channel_state |= ChannelState::TheirFundingLocked as u32;
1232 } else if non_shutdown_state == (ChannelState::FundingSent as u32 | ChannelState::OurFundingLocked as u32) {
1233 self.channel_state = ChannelState::ChannelFunded as u32 | (self.channel_state & BOTH_SIDES_SHUTDOWN_MASK);
1234 self.channel_update_count += 1;
1236 return Err(HandleError{err: "Peer sent a funding_locked at a strange time", action: None});
1239 self.their_prev_commitment_point = Some(self.their_cur_commitment_point);
1240 self.their_cur_commitment_point = msg.next_per_commitment_point;
1244 /// Returns (inbound_htlc_count, outbound_htlc_count, htlc_outbound_value_msat, htlc_inbound_value_msat)
1245 /// If its for a remote update check, we need to be more lax about checking against messages we
1246 /// sent but they may not have received/processed before they sent this message. Further, for
1247 /// our own sends, we're more conservative and even consider things they've removed against
1248 /// totals, though there is little reason to outside of further avoiding any race condition
1250 fn get_pending_htlc_stats(&self, for_remote_update_check: bool) -> (u32, u32, u64, u64) {
1251 let mut inbound_htlc_count: u32 = 0;
1252 let mut outbound_htlc_count: u32 = 0;
1253 let mut htlc_outbound_value_msat = 0;
1254 let mut htlc_inbound_value_msat = 0;
1255 for ref htlc in self.pending_htlcs.iter() {
1257 HTLCState::RemoteAnnounced => {},
1258 HTLCState::AwaitingRemoteRevokeToAnnounce => {},
1259 HTLCState::AwaitingAnnouncedRemoteRevoke => {},
1260 HTLCState::LocalAnnounced => { if for_remote_update_check { continue; } },
1261 HTLCState::Committed => {},
1262 HTLCState::RemoteRemoved => { if for_remote_update_check { continue; } },
1263 HTLCState::AwaitingRemoteRevokeToRemove => { if for_remote_update_check { continue; } },
1264 HTLCState::AwaitingRemovedRemoteRevoke => { if for_remote_update_check { continue; } },
1265 HTLCState::LocalRemoved => {},
1266 HTLCState::LocalRemovedAwaitingCommitment => { if for_remote_update_check { continue; } },
1269 inbound_htlc_count += 1;
1270 htlc_inbound_value_msat += htlc.amount_msat;
1272 outbound_htlc_count += 1;
1273 htlc_outbound_value_msat += htlc.amount_msat;
1276 (inbound_htlc_count, outbound_htlc_count, htlc_outbound_value_msat, htlc_inbound_value_msat)
1279 pub fn update_add_htlc(&mut self, msg: &msgs::UpdateAddHTLC, pending_forward_state: PendingForwardHTLCInfo) -> Result<(), HandleError> {
1280 if (self.channel_state & (ChannelState::ChannelFunded as u32 | ChannelState::RemoteShutdownSent as u32)) != (ChannelState::ChannelFunded as u32) {
1281 return Err(HandleError{err: "Got add HTLC message when channel was not in an operational state", action: None});
1283 if msg.amount_msat > self.channel_value_satoshis * 1000 {
1284 return Err(HandleError{err: "Remote side tried to send more than the total value of the channel", action: None});
1286 if msg.amount_msat < self.our_htlc_minimum_msat {
1287 return Err(HandleError{err: "Remote side tried to send less than our minimum HTLC value", action: None});
1290 let (inbound_htlc_count, _, htlc_outbound_value_msat, htlc_inbound_value_msat) = self.get_pending_htlc_stats(true);
1291 if inbound_htlc_count + 1 > OUR_MAX_HTLCS as u32 {
1292 return Err(HandleError{err: "Remote tried to push more than our max accepted HTLCs", action: None});
1294 //TODO: Spec is unclear if this is per-direction or in total (I assume per direction):
1295 // Check our_max_htlc_value_in_flight_msat
1296 if htlc_inbound_value_msat + msg.amount_msat > Channel::get_our_max_htlc_value_in_flight_msat(self.channel_value_satoshis) {
1297 return Err(HandleError{err: "Remote HTLC add would put them over their max HTLC value in flight", action: None});
1299 // Check our_channel_reserve_satoshis (we're getting paid, so they have to at least meet
1300 // the reserve_satoshis we told them to always have as direct payment so that they lose
1301 // something if we punish them for broadcasting an old state).
1302 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 {
1303 return Err(HandleError{err: "Remote HTLC add would put them over their reserve value", action: None});
1305 if self.next_remote_htlc_id != msg.htlc_id {
1306 return Err(HandleError{err: "Remote skipped HTLC ID", action: None});
1308 if msg.cltv_expiry >= 500000000 {
1309 return Err(HandleError{err: "Remote provided CLTV expiry in seconds instead of block height", action: None});
1312 //TODO: Check msg.cltv_expiry further? Do this in channel manager?
1314 // Now update local state:
1315 self.next_remote_htlc_id += 1;
1316 self.pending_htlcs.push(HTLCOutput {
1318 htlc_id: msg.htlc_id,
1319 amount_msat: msg.amount_msat,
1320 payment_hash: msg.payment_hash,
1321 cltv_expiry: msg.cltv_expiry,
1322 state: HTLCState::RemoteAnnounced,
1324 local_removed_fulfilled: false,
1325 pending_forward_state: Some(pending_forward_state),
1331 /// Removes an outbound HTLC which has been commitment_signed by the remote end
1333 fn mark_outbound_htlc_removed(&mut self, htlc_id: u64, check_preimage: Option<[u8; 32]>, fail_reason: Option<HTLCFailReason>) -> Result<[u8; 32], HandleError> {
1334 for htlc in self.pending_htlcs.iter_mut() {
1335 if htlc.outbound && htlc.htlc_id == htlc_id {
1336 match check_preimage {
1338 Some(payment_hash) =>
1339 if payment_hash != htlc.payment_hash {
1340 return Err(HandleError{err: "Remote tried to fulfill HTLC with an incorrect preimage", action: None});
1343 if htlc.state == HTLCState::LocalAnnounced {
1344 return Err(HandleError{err: "Remote tried to fulfill HTLC before it had been committed", action: None});
1345 } else if htlc.state == HTLCState::Committed {
1346 htlc.state = HTLCState::RemoteRemoved;
1347 htlc.fail_reason = fail_reason;
1348 } else if htlc.state == HTLCState::AwaitingRemoteRevokeToRemove || htlc.state == HTLCState::AwaitingRemovedRemoteRevoke || htlc.state == HTLCState::RemoteRemoved {
1349 return Err(HandleError{err: "Remote tried to fulfill HTLC that they'd already fulfilled", action: None});
1351 panic!("Got a non-outbound state on an outbound HTLC");
1353 return Ok(htlc.payment_hash.clone());
1356 Err(HandleError{err: "Remote tried to fulfill/fail an HTLC we couldn't find", action: None})
1359 pub fn update_fulfill_htlc(&mut self, msg: &msgs::UpdateFulfillHTLC) -> Result<ChannelMonitor, HandleError> {
1360 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
1361 return Err(HandleError{err: "Got add HTLC message when channel was not in an operational state", action: None});
1364 let mut sha = Sha256::new();
1365 sha.input(&msg.payment_preimage);
1366 let mut payment_hash = [0; 32];
1367 sha.result(&mut payment_hash);
1369 self.channel_monitor.provide_payment_preimage(&payment_hash, &msg.payment_preimage);
1370 self.mark_outbound_htlc_removed(msg.htlc_id, Some(payment_hash), None)?;
1371 Ok(self.channel_monitor.clone())
1374 pub fn update_fail_htlc(&mut self, msg: &msgs::UpdateFailHTLC, fail_reason: HTLCFailReason) -> Result<[u8; 32], HandleError> {
1375 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
1376 return Err(HandleError{err: "Got add HTLC message when channel was not in an operational state", action: None});
1379 self.mark_outbound_htlc_removed(msg.htlc_id, None, Some(fail_reason))
1382 pub fn update_fail_malformed_htlc(&mut self, msg: &msgs::UpdateFailMalformedHTLC, fail_reason: HTLCFailReason) -> Result<(), HandleError> {
1383 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
1384 return Err(HandleError{err: "Got add HTLC message when channel was not in an operational state", action: None});
1387 self.mark_outbound_htlc_removed(msg.htlc_id, None, Some(fail_reason))?;
1391 pub fn commitment_signed(&mut self, msg: &msgs::CommitmentSigned) -> Result<(msgs::RevokeAndACK, Option<msgs::CommitmentSigned>, ChannelMonitor), HandleError> {
1392 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
1393 return Err(HandleError{err: "Got commitment signed message when channel was not in an operational state", action: None});
1396 let funding_script = self.get_funding_redeemscript();
1398 let local_keys = self.build_local_transaction_keys(self.cur_local_commitment_transaction_number)?;
1399 let mut local_commitment_tx = self.build_commitment_transaction(self.cur_local_commitment_transaction_number, &local_keys, true, false);
1400 let local_commitment_txid = local_commitment_tx.0.txid();
1401 let local_sighash = Message::from_slice(&bip143::SighashComponents::new(&local_commitment_tx.0).sighash_all(&local_commitment_tx.0.input[0], &funding_script, self.channel_value_satoshis)[..]).unwrap();
1402 secp_call!(self.secp_ctx.verify(&local_sighash, &msg.signature, &self.their_funding_pubkey), "Invalid commitment tx signature from peer");
1404 if msg.htlc_signatures.len() != local_commitment_tx.1.len() {
1405 return Err(HandleError{err: "Got wrong number of HTLC signatures from remote", action: None});
1408 let mut new_local_commitment_txn = Vec::with_capacity(local_commitment_tx.1.len() + 1);
1409 self.sign_commitment_transaction(&mut local_commitment_tx.0, &msg.signature);
1410 new_local_commitment_txn.push(local_commitment_tx.0.clone());
1412 let mut htlcs_and_sigs = Vec::with_capacity(local_commitment_tx.1.len());
1413 for (idx, ref htlc) in local_commitment_tx.1.iter().enumerate() {
1414 let mut htlc_tx = self.build_htlc_transaction(&local_commitment_txid, htlc, true, &local_keys);
1415 let htlc_redeemscript = chan_utils::get_htlc_redeemscript(&htlc, &local_keys);
1416 let htlc_sighash = Message::from_slice(&bip143::SighashComponents::new(&htlc_tx).sighash_all(&htlc_tx.input[0], &htlc_redeemscript, htlc.amount_msat / 1000)[..]).unwrap();
1417 secp_call!(self.secp_ctx.verify(&htlc_sighash, &msg.htlc_signatures[idx], &local_keys.b_htlc_key), "Invalid HTLC tx siganture from peer");
1418 let htlc_sig = if htlc.offered {
1419 let htlc_sig = self.sign_htlc_transaction(&mut htlc_tx, &msg.htlc_signatures[idx], &None, htlc, &local_keys)?;
1420 new_local_commitment_txn.push(htlc_tx);
1423 self.create_htlc_tx_signature(&htlc_tx, htlc, &local_keys)?.1
1425 htlcs_and_sigs.push(((*htlc).clone(), msg.htlc_signatures[idx], htlc_sig));
1428 let next_per_commitment_point = PublicKey::from_secret_key(&self.secp_ctx, &self.build_local_commitment_secret(self.cur_local_commitment_transaction_number - 1)).unwrap();
1429 let per_commitment_secret = chan_utils::build_commitment_secret(self.local_keys.commitment_seed, self.cur_local_commitment_transaction_number + 1);
1431 // Update state now that we've passed all the can-fail calls...
1432 self.channel_monitor.provide_latest_local_commitment_tx_info(local_commitment_tx.0, local_keys, self.feerate_per_kw, htlcs_and_sigs);
1434 let mut need_our_commitment = false;
1435 for htlc in self.pending_htlcs.iter_mut() {
1436 if htlc.state == HTLCState::RemoteAnnounced {
1437 htlc.state = HTLCState::AwaitingRemoteRevokeToAnnounce;
1438 need_our_commitment = true;
1439 } else if htlc.state == HTLCState::RemoteRemoved {
1440 htlc.state = HTLCState::AwaitingRemoteRevokeToRemove;
1441 need_our_commitment = true;
1444 // Finally delete all the LocalRemovedAwaitingCommitment HTLCs
1445 // We really shouldnt have two passes here, but retain gives a non-mutable ref (Rust bug)
1446 let mut claimed_value_msat = 0;
1447 self.pending_htlcs.retain(|htlc| {
1448 if htlc.state == HTLCState::LocalRemovedAwaitingCommitment {
1449 claimed_value_msat += htlc.amount_msat;
1453 self.value_to_self_msat += claimed_value_msat;
1455 self.cur_local_commitment_transaction_number -= 1;
1456 self.last_local_commitment_txn = new_local_commitment_txn;
1458 let (our_commitment_signed, monitor_update) = if need_our_commitment && (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32)) == 0 {
1459 // If we're AwaitingRemoteRevoke we can't send a new commitment here, but that's ok -
1460 // we'll send one right away when we get the revoke_and_ack when we
1461 // free_holding_cell_htlcs().
1462 let (msg, monitor) = self.send_commitment_no_status_check()?;
1463 (Some(msg), monitor)
1464 } else { (None, self.channel_monitor.clone()) };
1466 Ok((msgs::RevokeAndACK {
1467 channel_id: self.channel_id,
1468 per_commitment_secret: per_commitment_secret,
1469 next_per_commitment_point: next_per_commitment_point,
1470 }, our_commitment_signed, monitor_update))
1473 /// Used to fulfill holding_cell_htlcs when we get a remote ack (or implicitly get it by them
1474 /// fulfilling or failing the last pending HTLC)
1475 fn free_holding_cell_htlcs(&mut self) -> Result<Option<(msgs::CommitmentUpdate, ChannelMonitor)>, HandleError> {
1476 if self.holding_cell_htlc_updates.len() != 0 {
1477 let mut htlc_updates = Vec::new();
1478 mem::swap(&mut htlc_updates, &mut self.holding_cell_htlc_updates);
1479 let mut update_add_htlcs = Vec::with_capacity(htlc_updates.len());
1480 let mut update_fulfill_htlcs = Vec::with_capacity(htlc_updates.len());
1481 let mut update_fail_htlcs = Vec::with_capacity(htlc_updates.len());
1483 for htlc_update in htlc_updates.drain(..) {
1484 // Note that this *can* fail, though it should be due to rather-rare conditions on
1485 // fee races with adding too many outputs which push our total payments just over
1486 // the limit. In case its less rare than I anticipate, we may want to revisit
1487 // handling this case better and maybe fufilling some of the HTLCs while attempting
1488 // to rebalance channels.
1489 if err.is_some() { // We're back to AwaitingRemoteRevoke (or are about to fail the channel)
1490 self.holding_cell_htlc_updates.push(htlc_update);
1492 match &htlc_update {
1493 &HTLCUpdateAwaitingACK::AddHTLC {amount_msat, cltv_expiry, payment_hash, ref onion_routing_packet, ..} => {
1494 match self.send_htlc(amount_msat, payment_hash, cltv_expiry, onion_routing_packet.clone()) {
1495 Ok(update_add_msg_option) => update_add_htlcs.push(update_add_msg_option.unwrap()),
1501 &HTLCUpdateAwaitingACK::ClaimHTLC { payment_preimage, .. } => {
1502 match self.get_update_fulfill_htlc(payment_preimage) {
1503 Ok(update_fulfill_msg_option) => update_fulfill_htlcs.push(update_fulfill_msg_option.0.unwrap()),
1509 &HTLCUpdateAwaitingACK::FailHTLC { payment_hash, ref err_packet } => {
1510 match self.get_update_fail_htlc(&payment_hash, err_packet.clone()) {
1511 Ok(update_fail_msg_option) => update_fail_htlcs.push(update_fail_msg_option.unwrap()),
1519 self.holding_cell_htlc_updates.push(htlc_update);
1523 //TODO: Need to examine the type of err - if its a fee issue or similar we may want to
1524 //fail it back the route, if its a temporary issue we can ignore it...
1527 let (commitment_signed, monitor_update) = self.send_commitment_no_status_check()?;
1528 Ok(Some((msgs::CommitmentUpdate {
1530 update_fulfill_htlcs,
1533 }, monitor_update)))
1542 /// Handles receiving a remote's revoke_and_ack. Note that we may return a new
1543 /// commitment_signed message here in case we had pending outbound HTLCs to add which were
1544 /// waiting on this revoke_and_ack. The generation of this new commitment_signed may also fail,
1545 /// generating an appropriate error *after* the channel state has been updated based on the
1546 /// revoke_and_ack message.
1547 pub fn revoke_and_ack(&mut self, msg: &msgs::RevokeAndACK) -> Result<(Option<msgs::CommitmentUpdate>, Vec<PendingForwardHTLCInfo>, Vec<([u8; 32], HTLCFailReason)>, ChannelMonitor), HandleError> {
1548 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
1549 return Err(HandleError{err: "Got revoke/ACK message when channel was not in an operational state", action: None});
1551 if let Some(their_prev_commitment_point) = self.their_prev_commitment_point {
1552 if PublicKey::from_secret_key(&self.secp_ctx, &secp_call!(SecretKey::from_slice(&self.secp_ctx, &msg.per_commitment_secret), "Peer provided an invalid per_commitment_secret")).unwrap() != their_prev_commitment_point {
1553 return Err(HandleError{err: "Got a revoke commitment secret which didn't correspond to their current pubkey", action: None});
1556 self.channel_monitor.provide_secret(self.cur_remote_commitment_transaction_number + 1, msg.per_commitment_secret, Some((self.cur_remote_commitment_transaction_number - 1, msg.next_per_commitment_point)))?;
1558 // Update state now that we've passed all the can-fail calls...
1559 // (note that we may still fail to generate the new commitment_signed message, but that's
1560 // OK, we step the channel here and *then* if the new generation fails we can fail the
1561 // channel based on that, but stepping stuff here should be safe either way.
1562 self.channel_state &= !(ChannelState::AwaitingRemoteRevoke as u32);
1563 self.their_prev_commitment_point = Some(self.their_cur_commitment_point);
1564 self.their_cur_commitment_point = msg.next_per_commitment_point;
1565 self.cur_remote_commitment_transaction_number -= 1;
1567 let mut to_forward_infos = Vec::new();
1568 let mut revoked_htlcs = Vec::new();
1569 let mut require_commitment = false;
1570 let mut value_to_self_msat_diff: i64 = 0;
1571 // We really shouldnt have two passes here, but retain gives a non-mutable ref (Rust bug)
1572 self.pending_htlcs.retain(|htlc| {
1573 if htlc.state == HTLCState::LocalRemoved {
1574 if htlc.local_removed_fulfilled { true } else { false }
1575 } else if htlc.state == HTLCState::AwaitingRemovedRemoteRevoke {
1576 if let Some(reason) = htlc.fail_reason.clone() { // We really want take() here, but, again, non-mut ref :(
1577 revoked_htlcs.push((htlc.payment_hash, reason));
1579 // They fulfilled, so we sent them money
1580 value_to_self_msat_diff -= htlc.amount_msat as i64;
1585 for htlc in self.pending_htlcs.iter_mut() {
1586 if htlc.state == HTLCState::LocalAnnounced {
1587 htlc.state = HTLCState::Committed;
1588 } else if htlc.state == HTLCState::AwaitingRemoteRevokeToAnnounce {
1589 htlc.state = HTLCState::AwaitingAnnouncedRemoteRevoke;
1590 require_commitment = true;
1591 } else if htlc.state == HTLCState::AwaitingAnnouncedRemoteRevoke {
1592 htlc.state = HTLCState::Committed;
1593 to_forward_infos.push(htlc.pending_forward_state.take().unwrap());
1594 } else if htlc.state == HTLCState::AwaitingRemoteRevokeToRemove {
1595 htlc.state = HTLCState::AwaitingRemovedRemoteRevoke;
1596 require_commitment = true;
1597 } else if htlc.state == HTLCState::LocalRemoved {
1598 assert!(htlc.local_removed_fulfilled);
1599 htlc.state = HTLCState::LocalRemovedAwaitingCommitment;
1602 self.value_to_self_msat = (self.value_to_self_msat as i64 + value_to_self_msat_diff) as u64;
1604 match self.free_holding_cell_htlcs()? {
1605 Some(commitment_update) => {
1606 Ok((Some(commitment_update.0), to_forward_infos, revoked_htlcs, commitment_update.1))
1609 if require_commitment {
1610 let (commitment_signed, monitor_update) = self.send_commitment_no_status_check()?;
1611 Ok((Some(msgs::CommitmentUpdate {
1612 update_add_htlcs: Vec::new(),
1613 update_fulfill_htlcs: Vec::new(),
1614 update_fail_htlcs: Vec::new(),
1616 }), to_forward_infos, revoked_htlcs, monitor_update))
1618 Ok((None, to_forward_infos, revoked_htlcs, self.channel_monitor.clone()))
1624 pub fn update_fee(&mut self, fee_estimator: &FeeEstimator, msg: &msgs::UpdateFee) -> Result<(), HandleError> {
1625 if self.channel_outbound {
1626 return Err(HandleError{err: "Non-funding remote tried to update channel fee", action: None});
1628 Channel::check_remote_fee(fee_estimator, msg.feerate_per_kw)?;
1629 self.channel_update_count += 1;
1630 self.feerate_per_kw = msg.feerate_per_kw as u64;
1634 pub fn shutdown(&mut self, fee_estimator: &FeeEstimator, msg: &msgs::Shutdown) -> Result<(Option<msgs::Shutdown>, Option<msgs::ClosingSigned>, Vec<[u8; 32]>), HandleError> {
1635 if self.channel_state < ChannelState::FundingSent as u32 {
1636 self.channel_state = ChannelState::ShutdownComplete as u32;
1637 self.channel_update_count += 1;
1638 return Ok((None, None, Vec::new()));
1640 for htlc in self.pending_htlcs.iter() {
1641 if htlc.state == HTLCState::RemoteAnnounced {
1642 return Err(HandleError{err: "Got shutdown with remote pending HTLCs", action: None});
1645 if (self.channel_state & ChannelState::RemoteShutdownSent as u32) == ChannelState::RemoteShutdownSent as u32 {
1646 return Err(HandleError{err: "Remote peer sent duplicate shutdown message", action: None});
1648 assert_eq!(self.channel_state & ChannelState::ShutdownComplete as u32, 0);
1650 // BOLT 2 says we must only send a scriptpubkey of certain standard forms, which are up to
1651 // 34 bytes in length, so dont let the remote peer feed us some super fee-heavy script.
1652 if self.channel_outbound && msg.scriptpubkey.len() > 34 {
1653 return Err(HandleError{err: "Got shutdown_scriptpubkey of absurd length from remote peer", action: None});
1655 //TODO: Check shutdown_scriptpubkey form as BOLT says we must? WHYYY
1657 if self.their_shutdown_scriptpubkey.is_some() {
1658 if Some(&msg.scriptpubkey) != self.their_shutdown_scriptpubkey.as_ref() {
1659 return Err(HandleError{err: "Got shutdown request with a scriptpubkey which did not match their previous scriptpubkey", action: None});
1662 self.their_shutdown_scriptpubkey = Some(msg.scriptpubkey.clone());
1665 let our_closing_script = self.get_closing_scriptpubkey();
1667 let (proposed_feerate, proposed_fee, our_sig) = if self.channel_outbound && self.pending_htlcs.is_empty() {
1668 let mut proposed_feerate = fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Background);
1669 if self.feerate_per_kw > proposed_feerate {
1670 proposed_feerate = self.feerate_per_kw;
1672 let tx_weight = Self::get_closing_transaction_weight(&our_closing_script, &msg.scriptpubkey);
1673 let proposed_total_fee_satoshis = proposed_feerate * tx_weight / 1000;
1675 let (closing_tx, total_fee_satoshis) = self.build_closing_transaction(proposed_total_fee_satoshis, false);
1676 let funding_redeemscript = self.get_funding_redeemscript();
1677 let sighash = Message::from_slice(&bip143::SighashComponents::new(&closing_tx).sighash_all(&closing_tx.input[0], &funding_redeemscript, self.channel_value_satoshis)[..]).unwrap();
1679 (Some(proposed_feerate), Some(total_fee_satoshis), Some(self.secp_ctx.sign(&sighash, &self.local_keys.funding_key).unwrap()))
1680 } else { (None, None, None) };
1682 // From here on out, we may not fail!
1684 self.channel_state |= ChannelState::RemoteShutdownSent as u32;
1685 self.channel_update_count += 1;
1687 // We can't send our shutdown until we've committed all of our pending HTLCs, but the
1688 // remote side is unlikely to accept any new HTLCs, so we go ahead and "free" any holding
1689 // cell HTLCs and return them to fail the payment.
1690 let mut dropped_outbound_htlcs = Vec::with_capacity(self.holding_cell_htlc_updates.len());
1691 self.holding_cell_htlc_updates.retain(|htlc_update| {
1693 &HTLCUpdateAwaitingACK::AddHTLC { ref payment_hash, .. } => {
1694 dropped_outbound_htlcs.push(payment_hash.clone());
1700 for htlc in self.pending_htlcs.iter() {
1701 if htlc.state == HTLCState::LocalAnnounced {
1702 return Ok((None, None, dropped_outbound_htlcs));
1706 let our_shutdown = if (self.channel_state & ChannelState::LocalShutdownSent as u32) == ChannelState::LocalShutdownSent as u32 {
1709 Some(msgs::Shutdown {
1710 channel_id: self.channel_id,
1711 scriptpubkey: our_closing_script,
1715 self.channel_state |= ChannelState::LocalShutdownSent as u32;
1716 self.channel_update_count += 1;
1717 if self.pending_htlcs.is_empty() && self.channel_outbound {
1718 // There are no more HTLCs and we're the funder, this means we start the closing_signed
1719 // dance with an initial fee proposal!
1720 self.last_sent_closing_fee = Some((proposed_feerate.unwrap(), proposed_fee.unwrap()));
1721 Ok((our_shutdown, Some(msgs::ClosingSigned {
1722 channel_id: self.channel_id,
1723 fee_satoshis: proposed_fee.unwrap(),
1724 signature: our_sig.unwrap(),
1725 }), dropped_outbound_htlcs))
1727 Ok((our_shutdown, None, dropped_outbound_htlcs))
1731 pub fn closing_signed(&mut self, fee_estimator: &FeeEstimator, msg: &msgs::ClosingSigned) -> Result<(Option<msgs::ClosingSigned>, Option<Transaction>), HandleError> {
1732 if self.channel_state & BOTH_SIDES_SHUTDOWN_MASK != BOTH_SIDES_SHUTDOWN_MASK {
1733 return Err(HandleError{err: "Remote end sent us a closing_signed before both sides provided a shutdown", action: None});
1735 if !self.pending_htlcs.is_empty() {
1736 return Err(HandleError{err: "Remote end sent us a closing_signed while there were still pending HTLCs", action: None});
1738 if msg.fee_satoshis > 21000000 * 10000000 {
1739 return Err(HandleError{err: "Remote tried to send us a closing tx with > 21 million BTC fee", action: None});
1742 let funding_redeemscript = self.get_funding_redeemscript();
1743 let (mut closing_tx, used_total_fee) = self.build_closing_transaction(msg.fee_satoshis, false);
1744 if used_total_fee != msg.fee_satoshis {
1745 return Err(HandleError{err: "Remote sent us a closing_signed with a fee greater than the value they can claim", action: None});
1747 let mut sighash = Message::from_slice(&bip143::SighashComponents::new(&closing_tx).sighash_all(&closing_tx.input[0], &funding_redeemscript, self.channel_value_satoshis)[..]).unwrap();
1749 match self.secp_ctx.verify(&sighash, &msg.signature, &self.their_funding_pubkey) {
1752 // The remote end may have decided to revoke their output due to inconsistent dust
1753 // limits, so check for that case by re-checking the signature here.
1754 closing_tx = self.build_closing_transaction(msg.fee_satoshis, true).0;
1755 sighash = Message::from_slice(&bip143::SighashComponents::new(&closing_tx).sighash_all(&closing_tx.input[0], &funding_redeemscript, self.channel_value_satoshis)[..]).unwrap();
1756 secp_call!(self.secp_ctx.verify(&sighash, &msg.signature, &self.their_funding_pubkey), "Invalid closing tx signature from peer");
1760 if let Some((_, last_fee)) = self.last_sent_closing_fee {
1761 if last_fee == msg.fee_satoshis {
1762 self.sign_commitment_transaction(&mut closing_tx, &msg.signature);
1763 self.channel_state = ChannelState::ShutdownComplete as u32;
1764 self.channel_update_count += 1;
1765 return Ok((None, Some(closing_tx)));
1769 macro_rules! propose_new_feerate {
1770 ($new_feerate: expr) => {
1771 let closing_tx_max_weight = Self::get_closing_transaction_weight(&self.get_closing_scriptpubkey(), self.their_shutdown_scriptpubkey.as_ref().unwrap());
1772 let (closing_tx, used_total_fee) = self.build_closing_transaction($new_feerate * closing_tx_max_weight / 1000, false);
1773 sighash = Message::from_slice(&bip143::SighashComponents::new(&closing_tx).sighash_all(&closing_tx.input[0], &funding_redeemscript, self.channel_value_satoshis)[..]).unwrap();
1774 let our_sig = self.secp_ctx.sign(&sighash, &self.local_keys.funding_key).unwrap();
1775 self.last_sent_closing_fee = Some(($new_feerate, used_total_fee));
1776 return Ok((Some(msgs::ClosingSigned {
1777 channel_id: self.channel_id,
1778 fee_satoshis: used_total_fee,
1784 let proposed_sat_per_kw = msg.fee_satoshis * 1000 / closing_tx.get_weight();
1785 if self.channel_outbound {
1786 let our_max_feerate = fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Normal);
1787 if proposed_sat_per_kw > our_max_feerate {
1788 if let Some((last_feerate, _)) = self.last_sent_closing_fee {
1789 if our_max_feerate <= last_feerate {
1790 return Err(HandleError{err: "Unable to come to consensus about closing feerate, remote wanted something higher than our Normal feerate", action: None});
1793 propose_new_feerate!(our_max_feerate);
1796 let our_min_feerate = fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Background);
1797 if proposed_sat_per_kw < our_min_feerate {
1798 if let Some((last_feerate, _)) = self.last_sent_closing_fee {
1799 if our_min_feerate >= last_feerate {
1800 return Err(HandleError{err: "Unable to come to consensus about closing feerate, remote wanted something lower than our Background feerate", action: None});
1803 propose_new_feerate!(our_min_feerate);
1807 let our_sig = self.sign_commitment_transaction(&mut closing_tx, &msg.signature);
1808 self.channel_state = ChannelState::ShutdownComplete as u32;
1809 self.channel_update_count += 1;
1811 Ok((Some(msgs::ClosingSigned {
1812 channel_id: self.channel_id,
1813 fee_satoshis: msg.fee_satoshis,
1815 }), Some(closing_tx)))
1818 // Public utilities:
1820 pub fn channel_id(&self) -> [u8; 32] {
1824 /// Gets the "user_id" value passed into the construction of this channel. It has no special
1825 /// meaning and exists only to allow users to have a persistent identifier of a channel.
1826 pub fn get_user_id(&self) -> u64 {
1830 pub fn channel_monitor(&self) -> ChannelMonitor {
1831 if self.channel_state < ChannelState::FundingCreated as u32 {
1832 panic!("Can't get a channel monitor until funding has been created");
1834 self.channel_monitor.clone()
1837 /// Guaranteed to be Some after both FundingLocked messages have been exchanged (and, thus,
1838 /// is_usable() returns true).
1839 pub fn get_short_channel_id(&self) -> Option<u64> {
1840 self.short_channel_id
1843 /// Returns the funding_txo we either got from our peer, or were given by
1844 /// get_outbound_funding_created.
1845 pub fn get_funding_txo(&self) -> Option<OutPoint> {
1846 self.channel_monitor.get_funding_txo()
1849 pub fn get_their_node_id(&self) -> PublicKey {
1853 pub fn get_our_htlc_minimum_msat(&self) -> u64 {
1854 self.our_htlc_minimum_msat
1857 pub fn get_value_satoshis(&self) -> u64 {
1858 self.channel_value_satoshis
1861 pub fn get_channel_update_count(&self) -> u32 {
1862 self.channel_update_count
1865 pub fn should_announce(&self) -> bool {
1866 self.announce_publicly
1869 /// Gets the fee we'd want to charge for adding an HTLC output to this Channel
1870 pub fn get_our_fee_base_msat(&self, fee_estimator: &FeeEstimator) -> u32 {
1871 // For lack of a better metric, we calculate what it would cost to consolidate the new HTLC
1872 // output value back into a transaction with the regular channel output:
1874 // the fee cost of the HTLC-Success/HTLC-Timeout transaction:
1875 let mut res = self.feerate_per_kw * cmp::max(HTLC_TIMEOUT_TX_WEIGHT, HTLC_SUCCESS_TX_WEIGHT) / 1000;
1877 if self.channel_outbound {
1878 // + the marginal fee increase cost to us in the commitment transaction:
1879 res += self.feerate_per_kw * COMMITMENT_TX_WEIGHT_PER_HTLC / 1000;
1882 // + the marginal cost of an input which spends the HTLC-Success/HTLC-Timeout output:
1883 res += fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Normal) * SPENDING_INPUT_FOR_A_OUTPUT_WEIGHT / 1000;
1888 /// Returns true if this channel is fully established and not known to be closing.
1889 pub fn is_usable(&self) -> bool {
1890 let mask = ChannelState::ChannelFunded as u32 | BOTH_SIDES_SHUTDOWN_MASK;
1891 (self.channel_state & mask) == (ChannelState::ChannelFunded as u32)
1894 /// Returns true if this channel is currently available for use. This is a superset of
1895 /// is_usable() and considers things like the channel being temporarily disabled.
1896 pub fn is_live(&self) -> bool {
1900 /// Returns true if this channel is fully shut down. True here implies that no further actions
1901 /// may/will be taken on this channel, and thus this object should be freed. Any future changes
1902 /// will be handled appropriately by the chain monitor.
1903 pub fn is_shutdown(&self) -> bool {
1904 if (self.channel_state & ChannelState::ShutdownComplete as u32) == ChannelState::ShutdownComplete as u32 {
1905 assert!(self.channel_state == ChannelState::ShutdownComplete as u32);
1910 /// Called by channelmanager based on chain blocks being connected.
1911 /// Note that we only need to use this to detect funding_signed, anything else is handled by
1912 /// the channel_monitor.
1913 pub fn block_connected(&mut self, header: &BlockHeader, height: u32, txn_matched: &[&Transaction], indexes_of_txn_matched: &[u32]) -> Option<msgs::FundingLocked> {
1914 let non_shutdown_state = self.channel_state & (!BOTH_SIDES_SHUTDOWN_MASK);
1915 if self.funding_tx_confirmations > 0 {
1916 if header.bitcoin_hash() != self.last_block_connected {
1917 self.last_block_connected = header.bitcoin_hash();
1918 self.funding_tx_confirmations += 1;
1919 if self.funding_tx_confirmations == CONF_TARGET as u64 {
1920 if non_shutdown_state == ChannelState::FundingSent as u32 {
1921 self.channel_state |= ChannelState::OurFundingLocked as u32;
1922 } else if non_shutdown_state == (ChannelState::FundingSent as u32 | ChannelState::TheirFundingLocked as u32) {
1923 self.channel_state = ChannelState::ChannelFunded as u32 | (self.channel_state & BOTH_SIDES_SHUTDOWN_MASK);
1924 self.channel_update_count += 1;
1925 //TODO: Something about a state where we "lost confirmation"
1926 } else if self.channel_state < ChannelState::ChannelFunded as u32 {
1927 panic!("Started confirming a channel in a state pre-FundingSent?");
1929 self.funding_tx_confirmed_in = header.bitcoin_hash();
1931 //TODO: Note that this must be a duplicate of the previous commitment point they sent us,
1932 //as otherwise we will have a commitment transaction that they can't revoke (well, kinda,
1933 //they can by sending two revoke_and_acks back-to-back, but not really). This appears to be
1934 //a protocol oversight, but I assume I'm just missing something.
1935 let next_per_commitment_secret = self.build_local_commitment_secret(self.cur_local_commitment_transaction_number);
1936 let next_per_commitment_point = PublicKey::from_secret_key(&self.secp_ctx, &next_per_commitment_secret).unwrap();
1937 return Some(msgs::FundingLocked {
1938 channel_id: self.channel_id,
1939 next_per_commitment_point: next_per_commitment_point,
1944 if non_shutdown_state & !(ChannelState::TheirFundingLocked as u32) == ChannelState::FundingSent as u32 {
1945 for (ref tx, index_in_block) in txn_matched.iter().zip(indexes_of_txn_matched) {
1946 if tx.txid() == self.channel_monitor.get_funding_txo().unwrap().txid {
1947 let txo_idx = self.channel_monitor.get_funding_txo().unwrap().index as usize;
1948 if txo_idx >= tx.output.len() || tx.output[txo_idx].script_pubkey != self.get_funding_redeemscript().to_v0_p2wsh() ||
1949 tx.output[txo_idx].value != self.channel_value_satoshis {
1950 self.channel_state = ChannelState::ShutdownComplete as u32;
1951 self.channel_update_count += 1;
1953 self.funding_tx_confirmations = 1;
1954 self.short_channel_id = Some(((height as u64) << (5*8)) |
1955 ((*index_in_block as u64) << (2*8)) |
1956 ((txo_idx as u64) << (0*8)));
1964 /// Called by channelmanager based on chain blocks being disconnected.
1965 /// Returns true if we need to close the channel now due to funding transaction
1966 /// unconfirmation/reorg.
1967 pub fn block_disconnected(&mut self, header: &BlockHeader) -> bool {
1968 if self.funding_tx_confirmations > 0 {
1969 self.funding_tx_confirmations -= 1;
1970 if self.funding_tx_confirmations == UNCONF_THRESHOLD as u64 {
1974 if header.bitcoin_hash() == self.funding_tx_confirmed_in {
1975 self.funding_tx_confirmations = CONF_TARGET as u64 - 1;
1980 // Methods to get unprompted messages to send to the remote end (or where we already returned
1981 // something in the handler for the message that prompted this message):
1983 pub fn get_open_channel(&self, chain_hash: Sha256dHash, fee_estimator: &FeeEstimator) -> Result<msgs::OpenChannel, HandleError> {
1984 if !self.channel_outbound {
1985 panic!("Tried to open a channel for an inbound channel?");
1987 if self.channel_state != ChannelState::OurInitSent as u32 {
1988 return Err(HandleError{err: "Cannot generate an open_channel after we've moved forward", action: None});
1991 if self.cur_local_commitment_transaction_number != (1 << 48) - 1 {
1992 panic!("Tried to send an open_channel for a channel that has already advanced");
1995 let local_commitment_secret = self.build_local_commitment_secret(self.cur_local_commitment_transaction_number);
1997 Ok(msgs::OpenChannel {
1998 chain_hash: chain_hash,
1999 temporary_channel_id: self.channel_id,
2000 funding_satoshis: self.channel_value_satoshis,
2001 push_msat: 0, //TODO: Something about feerate?
2002 dust_limit_satoshis: self.our_dust_limit_satoshis,
2003 max_htlc_value_in_flight_msat: Channel::get_our_max_htlc_value_in_flight_msat(self.channel_value_satoshis),
2004 channel_reserve_satoshis: Channel::get_our_channel_reserve_satoshis(self.channel_value_satoshis),
2005 htlc_minimum_msat: self.our_htlc_minimum_msat,
2006 feerate_per_kw: fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Background) as u32,
2007 to_self_delay: BREAKDOWN_TIMEOUT,
2008 max_accepted_htlcs: OUR_MAX_HTLCS,
2009 funding_pubkey: PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.funding_key).unwrap(),
2010 revocation_basepoint: PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.revocation_base_key).unwrap(),
2011 payment_basepoint: PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.payment_base_key).unwrap(),
2012 delayed_payment_basepoint: PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.delayed_payment_base_key).unwrap(),
2013 htlc_basepoint: PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.htlc_base_key).unwrap(),
2014 first_per_commitment_point: PublicKey::from_secret_key(&self.secp_ctx, &local_commitment_secret).unwrap(),
2015 channel_flags: if self.announce_publicly {1} else {0},
2016 shutdown_scriptpubkey: None,
2020 pub fn get_accept_channel(&self) -> Result<msgs::AcceptChannel, HandleError> {
2021 if self.channel_outbound {
2022 panic!("Tried to send accept_channel for an outbound channel?");
2024 if self.channel_state != (ChannelState::OurInitSent as u32) | (ChannelState::TheirInitSent as u32) {
2025 panic!("Tried to send accept_channel after channel had moved forward");
2027 if self.cur_local_commitment_transaction_number != (1 << 48) - 1 {
2028 panic!("Tried to send an accept_channel for a channel that has already advanced");
2031 let local_commitment_secret = self.build_local_commitment_secret(self.cur_local_commitment_transaction_number);
2033 Ok(msgs::AcceptChannel {
2034 temporary_channel_id: self.channel_id,
2035 dust_limit_satoshis: self.our_dust_limit_satoshis,
2036 max_htlc_value_in_flight_msat: Channel::get_our_max_htlc_value_in_flight_msat(self.channel_value_satoshis),
2037 channel_reserve_satoshis: Channel::get_our_channel_reserve_satoshis(self.channel_value_satoshis),
2038 htlc_minimum_msat: self.our_htlc_minimum_msat,
2039 minimum_depth: CONF_TARGET,
2040 to_self_delay: BREAKDOWN_TIMEOUT,
2041 max_accepted_htlcs: OUR_MAX_HTLCS,
2042 funding_pubkey: PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.funding_key).unwrap(),
2043 revocation_basepoint: PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.revocation_base_key).unwrap(),
2044 payment_basepoint: PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.payment_base_key).unwrap(),
2045 delayed_payment_basepoint: PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.delayed_payment_base_key).unwrap(),
2046 htlc_basepoint: PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.htlc_base_key).unwrap(),
2047 first_per_commitment_point: PublicKey::from_secret_key(&self.secp_ctx, &local_commitment_secret).unwrap(),
2048 shutdown_scriptpubkey: None,
2052 fn get_outbound_funding_created_signature(&mut self) -> Result<(Signature, Transaction), HandleError> {
2053 let funding_script = self.get_funding_redeemscript();
2055 let remote_keys = self.build_remote_transaction_keys()?;
2056 let remote_initial_commitment_tx = self.build_commitment_transaction(self.cur_remote_commitment_transaction_number, &remote_keys, false, false).0;
2057 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();
2059 // We sign the "remote" commitment transaction, allowing them to broadcast the tx if they wish.
2060 Ok((self.secp_ctx.sign(&remote_sighash, &self.local_keys.funding_key).unwrap(), remote_initial_commitment_tx))
2063 /// Updates channel state with knowledge of the funding transaction's txid/index, and generates
2064 /// a funding_created message for the remote peer.
2065 /// Panics if called at some time other than immediately after initial handshake, if called twice,
2066 /// or if called on an inbound channel.
2067 /// Note that channel_id changes during this call!
2068 /// Do NOT broadcast the funding transaction until after a successful funding_signed call!
2069 pub fn get_outbound_funding_created(&mut self, funding_txo: OutPoint) -> Result<(msgs::FundingCreated, ChannelMonitor), HandleError> {
2070 if !self.channel_outbound {
2071 panic!("Tried to create outbound funding_created message on an inbound channel!");
2073 if self.channel_state != (ChannelState::OurInitSent as u32 | ChannelState::TheirInitSent as u32) {
2074 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)");
2076 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 {
2077 panic!("Should not have advanced channel commitment tx numbers prior to funding_created");
2080 let funding_txo_script = self.get_funding_redeemscript().to_v0_p2wsh();
2081 self.channel_monitor.set_funding_info((funding_txo, funding_txo_script));
2083 let (our_signature, commitment_tx) = match self.get_outbound_funding_created_signature() {
2086 self.channel_monitor.unset_funding_info();
2091 let temporary_channel_id = self.channel_id;
2093 // Now that we're past error-generating stuff, update our local state:
2094 self.channel_monitor.provide_latest_remote_commitment_tx_info(&commitment_tx, Vec::new(), self.cur_remote_commitment_transaction_number);
2095 self.channel_state = ChannelState::FundingCreated as u32;
2096 self.channel_id = funding_txo.to_channel_id();
2097 self.cur_remote_commitment_transaction_number -= 1;
2099 Ok((msgs::FundingCreated {
2100 temporary_channel_id: temporary_channel_id,
2101 funding_txid: funding_txo.txid,
2102 funding_output_index: funding_txo.index,
2103 signature: our_signature
2104 }, self.channel_monitor.clone()))
2107 /// Gets an UnsignedChannelAnnouncement, as well as a signature covering it using our
2108 /// bitcoin_key, if available, for this channel. The channel must be publicly announceable and
2109 /// available for use (have exchanged FundingLocked messages in both directions. Should be used
2110 /// for both loose and in response to an AnnouncementSignatures message from the remote peer.
2111 /// Note that you can get an announcement for a channel which is closing, though you should
2112 /// likely not announce such a thing. In case its already been announced, a channel_update
2113 /// message can mark the channel disabled.
2114 pub fn get_channel_announcement(&self, our_node_id: PublicKey, chain_hash: Sha256dHash) -> Result<(msgs::UnsignedChannelAnnouncement, Signature), HandleError> {
2115 if !self.announce_publicly {
2116 return Err(HandleError{err: "Channel is not available for public announcements", action: None});
2118 if self.channel_state & (ChannelState::ChannelFunded as u32) != (ChannelState::ChannelFunded as u32) {
2119 return Err(HandleError{err: "Cannot get a ChannelAnnouncement until the channel funding has been locked", action: None});
2122 let were_node_one = our_node_id.serialize()[..] < self.their_node_id.serialize()[..];
2123 let our_bitcoin_key = PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.funding_key).unwrap();
2125 let msg = msgs::UnsignedChannelAnnouncement {
2126 features: msgs::GlobalFeatures::new(),
2127 chain_hash: chain_hash,
2128 short_channel_id: self.get_short_channel_id().unwrap(),
2129 node_id_1: if were_node_one { our_node_id } else { self.get_their_node_id() },
2130 node_id_2: if were_node_one { self.get_their_node_id() } else { our_node_id },
2131 bitcoin_key_1: if were_node_one { our_bitcoin_key } else { self.their_funding_pubkey },
2132 bitcoin_key_2: if were_node_one { self.their_funding_pubkey } else { our_bitcoin_key },
2135 let msghash = Message::from_slice(&Sha256dHash::from_data(&msg.encode()[..])[..]).unwrap();
2136 let sig = self.secp_ctx.sign(&msghash, &self.local_keys.funding_key).unwrap();
2142 // Send stuff to our remote peers:
2144 /// Adds a pending outbound HTLC to this channel, note that you probably want
2145 /// send_htlc_and_commit instead cause you'll want both messages at once.
2146 /// This returns an option instead of a pure UpdateAddHTLC as we may be in a state where we are
2147 /// waiting on the remote peer to send us a revoke_and_ack during which time we cannot add new
2148 /// HTLCs on the wire or we wouldn't be able to determine what they actually ACK'ed.
2149 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> {
2150 if (self.channel_state & (ChannelState::ChannelFunded as u32 | BOTH_SIDES_SHUTDOWN_MASK)) != (ChannelState::ChannelFunded as u32) {
2151 return Err(HandleError{err: "Cannot send HTLC until channel is fully established and we haven't started shutting down", action: None});
2154 if amount_msat > self.channel_value_satoshis * 1000 {
2155 return Err(HandleError{err: "Cannot send more than the total value of the channel", action: None});
2157 if amount_msat < self.their_htlc_minimum_msat {
2158 return Err(HandleError{err: "Cannot send less than their minimum HTLC value", action: None});
2161 let (_, outbound_htlc_count, htlc_outbound_value_msat, htlc_inbound_value_msat) = self.get_pending_htlc_stats(false);
2162 if outbound_htlc_count + 1 > self.their_max_accepted_htlcs as u32 {
2163 return Err(HandleError{err: "Cannot push more than their max accepted HTLCs", action: None});
2165 //TODO: Spec is unclear if this is per-direction or in total (I assume per direction):
2166 // Check their_max_htlc_value_in_flight_msat
2167 if htlc_outbound_value_msat + amount_msat > self.their_max_htlc_value_in_flight_msat {
2168 return Err(HandleError{err: "Cannot send value that would put us over our max HTLC value in flight", action: None});
2170 // Check their_channel_reserve_satoshis:
2171 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 {
2172 return Err(HandleError{err: "Cannot send value that would put us over our reserve value", action: None});
2175 //TODO: Check cltv_expiry? Do this in channel manager?
2177 // Now update local state:
2178 if (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32)) == (ChannelState::AwaitingRemoteRevoke as u32) {
2179 //TODO: Check the limits *including* other pending holding cell HTLCs!
2180 self.holding_cell_htlc_updates.push(HTLCUpdateAwaitingACK::AddHTLC {
2181 amount_msat: amount_msat,
2182 payment_hash: payment_hash,
2183 cltv_expiry: cltv_expiry,
2184 onion_routing_packet: onion_routing_packet,
2185 time_created: Instant::now(),
2190 self.pending_htlcs.push(HTLCOutput {
2192 htlc_id: self.next_local_htlc_id,
2193 amount_msat: amount_msat,
2194 payment_hash: payment_hash.clone(),
2195 cltv_expiry: cltv_expiry,
2196 state: HTLCState::LocalAnnounced,
2198 local_removed_fulfilled: false,
2199 pending_forward_state: None
2202 let res = msgs::UpdateAddHTLC {
2203 channel_id: self.channel_id,
2204 htlc_id: self.next_local_htlc_id,
2205 amount_msat: amount_msat,
2206 payment_hash: payment_hash,
2207 cltv_expiry: cltv_expiry,
2208 onion_routing_packet: onion_routing_packet,
2210 self.next_local_htlc_id += 1;
2215 /// Creates a signed commitment transaction to send to the remote peer.
2216 pub fn send_commitment(&mut self) -> Result<(msgs::CommitmentSigned, ChannelMonitor), HandleError> {
2217 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
2218 return Err(HandleError{err: "Cannot create commitment tx until channel is fully established", action: None});
2220 if (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32)) == (ChannelState::AwaitingRemoteRevoke as u32) {
2221 return Err(HandleError{err: "Cannot create commitment tx until remote revokes their previous commitment", action: None});
2223 let mut have_updates = false; // TODO initialize with "have we sent a fee update?"
2224 for htlc in self.pending_htlcs.iter() {
2225 if htlc.state == HTLCState::LocalAnnounced {
2226 have_updates = true;
2228 if have_updates { break; }
2231 return Err(HandleError{err: "Cannot create commitment tx until we have some updates to send", action: None});
2233 self.send_commitment_no_status_check()
2235 /// Only fails in case of bad keys
2236 fn send_commitment_no_status_check(&mut self) -> Result<(msgs::CommitmentSigned, ChannelMonitor), HandleError> {
2237 let funding_script = self.get_funding_redeemscript();
2239 // We can upgrade the status of some HTLCs that are waiting on a commitment, even if we
2240 // fail to generate this, we still are at least at a position where upgrading their status
2242 for htlc in self.pending_htlcs.iter_mut() {
2243 if htlc.state == HTLCState::AwaitingRemoteRevokeToAnnounce {
2244 htlc.state = HTLCState::AwaitingAnnouncedRemoteRevoke;
2245 } else if htlc.state == HTLCState::AwaitingRemoteRevokeToRemove {
2246 htlc.state = HTLCState::AwaitingRemovedRemoteRevoke;
2250 let remote_keys = self.build_remote_transaction_keys()?;
2251 let remote_commitment_tx = self.build_commitment_transaction(self.cur_remote_commitment_transaction_number, &remote_keys, false, true);
2252 let remote_commitment_txid = remote_commitment_tx.0.txid();
2253 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();
2254 let our_sig = self.secp_ctx.sign(&remote_sighash, &self.local_keys.funding_key).unwrap();
2256 let mut htlc_sigs = Vec::new();
2258 for ref htlc in remote_commitment_tx.1.iter() {
2259 let htlc_tx = self.build_htlc_transaction(&remote_commitment_txid, htlc, false, &remote_keys);
2260 let htlc_redeemscript = chan_utils::get_htlc_redeemscript(&htlc, &remote_keys);
2261 let htlc_sighash = Message::from_slice(&bip143::SighashComponents::new(&htlc_tx).sighash_all(&htlc_tx.input[0], &htlc_redeemscript, htlc.amount_msat / 1000)[..]).unwrap();
2262 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));
2263 htlc_sigs.push(self.secp_ctx.sign(&htlc_sighash, &our_htlc_key).unwrap());
2266 // Update state now that we've passed all the can-fail calls...
2267 self.channel_monitor.provide_latest_remote_commitment_tx_info(&remote_commitment_tx.0, remote_commitment_tx.1, self.cur_remote_commitment_transaction_number);
2268 self.channel_state |= ChannelState::AwaitingRemoteRevoke as u32;
2270 Ok((msgs::CommitmentSigned {
2271 channel_id: self.channel_id,
2273 htlc_signatures: htlc_sigs,
2274 }, self.channel_monitor.clone()))
2277 /// Adds a pending outbound HTLC to this channel, and creates a signed commitment transaction
2278 /// to send to the remote peer in one go.
2279 /// Shorthand for calling send_htlc() followed by send_commitment(), see docs on those for
2281 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> {
2282 match self.send_htlc(amount_msat, payment_hash, cltv_expiry, onion_routing_packet)? {
2283 Some(update_add_htlc) => {
2284 let (commitment_signed, monitor_update) = self.send_commitment_no_status_check()?;
2285 Ok(Some((update_add_htlc, commitment_signed, monitor_update)))
2291 /// Begins the shutdown process, getting a message for the remote peer and returning all
2292 /// holding cell HTLCs for payment failure.
2293 pub fn get_shutdown(&mut self) -> Result<(msgs::Shutdown, Vec<[u8; 32]>), HandleError> {
2294 for htlc in self.pending_htlcs.iter() {
2295 if htlc.state == HTLCState::LocalAnnounced {
2296 return Err(HandleError{err: "Cannot begin shutdown with pending HTLCs, call send_commitment first", action: None});
2299 if self.channel_state & BOTH_SIDES_SHUTDOWN_MASK != 0 {
2300 return Err(HandleError{err: "Shutdown already in progress", action: None});
2302 assert_eq!(self.channel_state & ChannelState::ShutdownComplete as u32, 0);
2304 let our_closing_script = self.get_closing_scriptpubkey();
2306 // From here on out, we may not fail!
2307 if self.channel_state < ChannelState::FundingSent as u32 {
2308 self.channel_state = ChannelState::ShutdownComplete as u32;
2310 self.channel_state |= ChannelState::LocalShutdownSent as u32;
2312 self.channel_update_count += 1;
2314 // We can't send our shutdown until we've committed all of our pending HTLCs, but the
2315 // remote side is unlikely to accept any new HTLCs, so we go ahead and "free" any holding
2316 // cell HTLCs and return them to fail the payment.
2317 let mut dropped_outbound_htlcs = Vec::with_capacity(self.holding_cell_htlc_updates.len());
2318 self.holding_cell_htlc_updates.retain(|htlc_update| {
2320 &HTLCUpdateAwaitingACK::AddHTLC { ref payment_hash, .. } => {
2321 dropped_outbound_htlcs.push(payment_hash.clone());
2328 Ok((msgs::Shutdown {
2329 channel_id: self.channel_id,
2330 scriptpubkey: our_closing_script,
2331 }, dropped_outbound_htlcs))
2334 /// Gets the latest commitment transaction and any dependant transactions for relay (forcing
2335 /// shutdown of this channel - no more calls into this Channel may be made afterwards.
2336 pub fn force_shutdown(&mut self) -> Vec<Transaction> {
2337 assert!(self.channel_state != ChannelState::ShutdownComplete as u32);
2338 self.channel_state = ChannelState::ShutdownComplete as u32;
2339 self.channel_update_count += 1;
2340 let mut res = Vec::new();
2341 mem::swap(&mut res, &mut self.last_local_commitment_txn);
2348 use bitcoin::util::hash::Sha256dHash;
2349 use bitcoin::util::bip143;
2350 use bitcoin::network::serialize::serialize;
2351 use bitcoin::blockdata::script::Script;
2352 use bitcoin::blockdata::transaction::Transaction;
2354 use ln::channel::{Channel,ChannelKeys,HTLCOutput,HTLCState,HTLCOutputInCommitment,TxCreationKeys};
2355 use ln::channel::MAX_FUNDING_SATOSHIS;
2357 use chain::chaininterface::{FeeEstimator,ConfirmationTarget};
2358 use chain::transaction::OutPoint;
2359 use secp256k1::{Secp256k1,Message,Signature};
2360 use secp256k1::key::{SecretKey,PublicKey};
2361 use crypto::sha2::Sha256;
2362 use crypto::digest::Digest;
2364 struct TestFeeEstimator {
2367 impl FeeEstimator for TestFeeEstimator {
2368 fn get_est_sat_per_1000_weight(&self, _: ConfirmationTarget) -> u64 {
2374 fn test_max_funding_satoshis() {
2375 assert!(MAX_FUNDING_SATOSHIS <= 21_000_000 * 100_000_000,
2376 "MAX_FUNDING_SATOSHIS is greater than all satoshis on existence");
2380 fn outbound_commitment_test() {
2381 // Test vectors from BOLT 3 Appendix C:
2382 let feeest = TestFeeEstimator{fee_est: 15000};
2383 let secp_ctx = Secp256k1::new();
2385 let chan_keys = ChannelKeys {
2386 funding_key: SecretKey::from_slice(&secp_ctx, &hex::decode("30ff4956bbdd3222d44cc5e8a1261dab1e07957bdac5ae88fe3261ef321f3749").unwrap()[..]).unwrap(),
2387 payment_base_key: SecretKey::from_slice(&secp_ctx, &hex::decode("1111111111111111111111111111111111111111111111111111111111111111").unwrap()[..]).unwrap(),
2388 delayed_payment_base_key: SecretKey::from_slice(&secp_ctx, &hex::decode("3333333333333333333333333333333333333333333333333333333333333333").unwrap()[..]).unwrap(),
2389 htlc_base_key: SecretKey::from_slice(&secp_ctx, &hex::decode("1111111111111111111111111111111111111111111111111111111111111111").unwrap()[..]).unwrap(),
2391 // These aren't set in the test vectors:
2392 revocation_base_key: SecretKey::from_slice(&secp_ctx, &hex::decode("0fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff").unwrap()[..]).unwrap(),
2393 channel_close_key: SecretKey::from_slice(&secp_ctx, &hex::decode("0fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff").unwrap()[..]).unwrap(),
2394 channel_monitor_claim_key: SecretKey::from_slice(&secp_ctx, &hex::decode("0fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff").unwrap()[..]).unwrap(),
2395 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],
2397 assert_eq!(PublicKey::from_secret_key(&secp_ctx, &chan_keys.funding_key).unwrap().serialize()[..],
2398 hex::decode("023da092f6980e58d2c037173180e9a465476026ee50f96695963e8efe436f54eb").unwrap()[..]);
2400 let mut chan = Channel::new_outbound(&feeest, chan_keys, PublicKey::new(), 10000000, false, 42); // Nothing uses their network key in this test
2401 chan.their_to_self_delay = 144;
2402 chan.our_dust_limit_satoshis = 546;
2404 let funding_info = OutPoint::new(Sha256dHash::from_hex("8984484a580b825b9972d7adb15050b3ab624ccd731946b3eeddb92f4e7ef6be").unwrap(), 0);
2405 chan.channel_monitor.set_funding_info((funding_info, Script::new()));
2407 chan.their_payment_basepoint = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&secp_ctx, &hex::decode("4444444444444444444444444444444444444444444444444444444444444444").unwrap()[..]).unwrap()).unwrap();
2408 assert_eq!(chan.their_payment_basepoint.serialize()[..],
2409 hex::decode("032c0b7cf95324a07d05398b240174dc0c2be444d96b159aa6c7f7b1e668680991").unwrap()[..]);
2411 chan.their_funding_pubkey = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&secp_ctx, &hex::decode("1552dfba4f6cf29a62a0af13c8d6981d36d0ef8d61ba10fb0fe90da7634d7e13").unwrap()[..]).unwrap()).unwrap();
2412 assert_eq!(chan.their_funding_pubkey.serialize()[..],
2413 hex::decode("030e9f7b623d2ccc7c9bd44d66d5ce21ce504c0acf6385a132cec6d3c39fa711c1").unwrap()[..]);
2415 chan.their_htlc_basepoint = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&secp_ctx, &hex::decode("4444444444444444444444444444444444444444444444444444444444444444").unwrap()[..]).unwrap()).unwrap();
2416 assert_eq!(chan.their_htlc_basepoint.serialize()[..],
2417 hex::decode("032c0b7cf95324a07d05398b240174dc0c2be444d96b159aa6c7f7b1e668680991").unwrap()[..]);
2419 chan.their_revocation_basepoint = PublicKey::from_slice(&secp_ctx, &hex::decode("02466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f27").unwrap()[..]).unwrap();
2421 // We can't just use build_local_transaction_keys here as the per_commitment_secret is not
2422 // derived from a commitment_seed, so instead we copy it here and call
2423 // build_commitment_transaction.
2424 let delayed_payment_base = PublicKey::from_secret_key(&secp_ctx, &chan.local_keys.delayed_payment_base_key).unwrap();
2425 let per_commitment_secret = SecretKey::from_slice(&secp_ctx, &hex::decode("1f1e1d1c1b1a191817161514131211100f0e0d0c0b0a09080706050403020100").unwrap()[..]).unwrap();
2426 let per_commitment_point = PublicKey::from_secret_key(&secp_ctx, &per_commitment_secret).unwrap();
2427 let htlc_basepoint = PublicKey::from_secret_key(&secp_ctx, &chan.local_keys.htlc_base_key).unwrap();
2428 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();
2430 let mut unsigned_tx: (Transaction, Vec<HTLCOutputInCommitment>);
2432 macro_rules! test_commitment {
2433 ( $their_sig_hex: expr, $our_sig_hex: expr, $tx_hex: expr) => {
2434 unsigned_tx = chan.build_commitment_transaction(0xffffffffffff - 42, &keys, true, false);
2435 let their_signature = Signature::from_der(&secp_ctx, &hex::decode($their_sig_hex).unwrap()[..]).unwrap();
2436 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();
2437 secp_ctx.verify(&sighash, &their_signature, &chan.their_funding_pubkey).unwrap();
2439 chan.sign_commitment_transaction(&mut unsigned_tx.0, &their_signature);
2441 assert_eq!(serialize(&unsigned_tx.0).unwrap()[..],
2442 hex::decode($tx_hex).unwrap()[..]);
2446 macro_rules! test_htlc_output {
2447 ( $htlc_idx: expr, $their_sig_hex: expr, $our_sig_hex: expr, $tx_hex: expr ) => {
2448 let remote_signature = Signature::from_der(&secp_ctx, &hex::decode($their_sig_hex).unwrap()[..]).unwrap();
2450 let ref htlc = unsigned_tx.1[$htlc_idx];
2451 let mut htlc_tx = chan.build_htlc_transaction(&unsigned_tx.0.txid(), &htlc, true, &keys);
2452 let htlc_redeemscript = chan_utils::get_htlc_redeemscript(&htlc, &keys);
2453 let htlc_sighash = Message::from_slice(&bip143::SighashComponents::new(&htlc_tx).sighash_all(&htlc_tx.input[0], &htlc_redeemscript, htlc.amount_msat / 1000)[..]).unwrap();
2454 secp_ctx.verify(&htlc_sighash, &remote_signature, &keys.b_htlc_key).unwrap();
2456 let mut preimage: Option<[u8; 32]> = None;
2459 let mut sha = Sha256::new();
2460 sha.input(&[i; 32]);
2462 let mut out = [0; 32];
2463 sha.result(&mut out);
2465 if out == htlc.payment_hash {
2466 preimage = Some([i; 32]);
2470 assert!(preimage.is_some());
2473 chan.sign_htlc_transaction(&mut htlc_tx, &remote_signature, &preimage, &htlc, &keys).unwrap();
2474 assert_eq!(serialize(&htlc_tx).unwrap()[..],
2475 hex::decode($tx_hex).unwrap()[..]);
2480 // simple commitment tx with no HTLCs
2481 chan.value_to_self_msat = 7000000000;
2483 test_commitment!("3045022100f51d2e566a70ba740fc5d8c0f07b9b93d2ed741c3c0860c613173de7d39e7968022041376d520e9c0e1ad52248ddf4b22e12be8763007df977253ef45a4ca3bdb7c0",
2484 "3044022051b75c73198c6deee1a875871c3961832909acd297c6b908d59e3319e5185a46022055c419379c5051a78d00dbbce11b5b664a0c22815fbcc6fcef6b1937c3836939",
2485 "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");
2488 chan.pending_htlcs.push({
2489 let mut out = HTLCOutput{
2492 amount_msat: 1000000,
2494 payment_hash: [0; 32],
2495 state: HTLCState::Committed,
2497 local_removed_fulfilled: false,
2498 pending_forward_state: None,
2500 let mut sha = Sha256::new();
2501 sha.input(&hex::decode("0000000000000000000000000000000000000000000000000000000000000000").unwrap());
2502 sha.result(&mut out.payment_hash);
2505 chan.pending_htlcs.push({
2506 let mut out = HTLCOutput{
2509 amount_msat: 2000000,
2511 payment_hash: [0; 32],
2512 state: HTLCState::Committed,
2514 local_removed_fulfilled: false,
2515 pending_forward_state: None,
2517 let mut sha = Sha256::new();
2518 sha.input(&hex::decode("0101010101010101010101010101010101010101010101010101010101010101").unwrap());
2519 sha.result(&mut out.payment_hash);
2522 chan.pending_htlcs.push({
2523 let mut out = HTLCOutput{
2526 amount_msat: 2000000,
2528 payment_hash: [0; 32],
2529 state: HTLCState::Committed,
2531 local_removed_fulfilled: false,
2532 pending_forward_state: None,
2534 let mut sha = Sha256::new();
2535 sha.input(&hex::decode("0202020202020202020202020202020202020202020202020202020202020202").unwrap());
2536 sha.result(&mut out.payment_hash);
2539 chan.pending_htlcs.push({
2540 let mut out = HTLCOutput{
2543 amount_msat: 3000000,
2545 payment_hash: [0; 32],
2546 state: HTLCState::Committed,
2548 local_removed_fulfilled: false,
2549 pending_forward_state: None,
2551 let mut sha = Sha256::new();
2552 sha.input(&hex::decode("0303030303030303030303030303030303030303030303030303030303030303").unwrap());
2553 sha.result(&mut out.payment_hash);
2556 chan.pending_htlcs.push({
2557 let mut out = HTLCOutput{
2560 amount_msat: 4000000,
2562 payment_hash: [0; 32],
2563 state: HTLCState::Committed,
2565 local_removed_fulfilled: false,
2566 pending_forward_state: None,
2568 let mut sha = Sha256::new();
2569 sha.input(&hex::decode("0404040404040404040404040404040404040404040404040404040404040404").unwrap());
2570 sha.result(&mut out.payment_hash);
2575 // commitment tx with all five HTLCs untrimmed (minimum feerate)
2576 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
2577 chan.feerate_per_kw = 0;
2579 test_commitment!("304402204fd4928835db1ccdfc40f5c78ce9bd65249b16348df81f0c44328dcdefc97d630220194d3869c38bc732dd87d13d2958015e2fc16829e74cd4377f84d215c0b70606",
2580 "30440220275b0c325a5e9355650dc30c0eccfbc7efb23987c24b556b9dfdd40effca18d202206caceb2c067836c51f296740c7ae807ffcbfbf1dd3a0d56b6de9a5b247985f06",
2581 "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");
2583 assert_eq!(unsigned_tx.1.len(), 5);
2585 test_htlc_output!(0,
2586 "304402206a6e59f18764a5bf8d4fa45eebc591566689441229c918b480fb2af8cc6a4aeb02205248f273be447684b33e3c8d1d85a8e0ca9fa0bae9ae33f0527ada9c162919a6",
2587 "304402207cb324fa0de88f452ffa9389678127ebcf4cabe1dd848b8e076c1a1962bf34720220116ed922b12311bd602d67e60d2529917f21c5b82f25ff6506c0f87886b4dfd5",
2588 "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");
2590 test_htlc_output!(1,
2591 "3045022100d5275b3619953cb0c3b5aa577f04bc512380e60fa551762ce3d7a1bb7401cff9022037237ab0dac3fe100cde094e82e2bed9ba0ed1bb40154b48e56aa70f259e608b",
2592 "3045022100c89172099507ff50f4c925e6c5150e871fb6e83dd73ff9fbb72f6ce829a9633f02203a63821d9162e99f9be712a68f9e589483994feae2661e4546cd5b6cec007be5",
2593 "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");
2595 test_htlc_output!(2,
2596 "304402201b63ec807771baf4fdff523c644080de17f1da478989308ad13a58b51db91d360220568939d38c9ce295adba15665fa68f51d967e8ed14a007b751540a80b325f202",
2597 "3045022100def389deab09cee69eaa1ec14d9428770e45bcbe9feb46468ecf481371165c2f022015d2e3c46600b2ebba8dcc899768874cc6851fd1ecb3fffd15db1cc3de7e10da",
2598 "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");
2600 test_htlc_output!(3,
2601 "3045022100daee1808f9861b6c3ecd14f7b707eca02dd6bdfc714ba2f33bc8cdba507bb182022026654bf8863af77d74f51f4e0b62d461a019561bb12acb120d3f7195d148a554",
2602 "30440220643aacb19bbb72bd2b635bc3f7375481f5981bace78cdd8319b2988ffcc6704202203d27784ec8ad51ed3bd517a05525a5139bb0b755dd719e0054332d186ac08727",
2603 "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");
2605 test_htlc_output!(4,
2606 "304402207e0410e45454b0978a623f36a10626ef17b27d9ad44e2760f98cfa3efb37924f0220220bd8acd43ecaa916a80bd4f919c495a2c58982ce7c8625153f8596692a801d",
2607 "30440220549e80b4496803cbc4a1d09d46df50109f546d43fbbf86cd90b174b1484acd5402205f12a4f995cb9bded597eabfee195a285986aa6d93ae5bb72507ebc6a4e2349e",
2608 "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");
2612 // commitment tx with seven outputs untrimmed (maximum feerate)
2613 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
2614 chan.feerate_per_kw = 647;
2616 test_commitment!("3045022100a5c01383d3ec646d97e40f44318d49def817fcd61a0ef18008a665b3e151785502203e648efddd5838981ef55ec954be69c4a652d021e6081a100d034de366815e9b",
2617 "304502210094bfd8f5572ac0157ec76a9551b6c5216a4538c07cd13a51af4a54cb26fa14320220768efce8ce6f4a5efac875142ff19237c011343670adf9c7ac69704a120d1163",
2618 "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");
2620 assert_eq!(unsigned_tx.1.len(), 5);
2622 test_htlc_output!(0,
2623 "30440220385a5afe75632f50128cbb029ee95c80156b5b4744beddc729ad339c9ca432c802202ba5f48550cad3379ac75b9b4fedb86a35baa6947f16ba5037fb8b11ab343740",
2624 "304402205999590b8a79fa346e003a68fd40366397119b2b0cdf37b149968d6bc6fbcc4702202b1e1fb5ab7864931caed4e732c359e0fe3d86a548b557be2246efb1708d579a",
2625 "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");
2627 test_htlc_output!(1,
2628 "304402207ceb6678d4db33d2401fdc409959e57c16a6cb97a30261d9c61f29b8c58d34b90220084b4a17b4ca0e86f2d798b3698ca52de5621f2ce86f80bed79afa66874511b0",
2629 "304402207ff03eb0127fc7c6cae49cc29e2a586b98d1e8969cf4a17dfa50b9c2647720b902205e2ecfda2252956c0ca32f175080e75e4e390e433feb1f8ce9f2ba55648a1dac",
2630 "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");
2632 test_htlc_output!(2,
2633 "304402206a401b29a0dff0d18ec903502c13d83e7ec019450113f4a7655a4ce40d1f65ba0220217723a084e727b6ca0cc8b6c69c014a7e4a01fcdcba3e3993f462a3c574d833",
2634 "3045022100d50d067ca625d54e62df533a8f9291736678d0b86c28a61bb2a80cf42e702d6e02202373dde7e00218eacdafb9415fe0e1071beec1857d1af3c6a201a44cbc47c877",
2635 "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");
2637 test_htlc_output!(3,
2638 "30450221009b1c987ba599ee3bde1dbca776b85481d70a78b681a8d84206723e2795c7cac002207aac84ad910f8598c4d1c0ea2e3399cf6627a4e3e90131315bc9f038451ce39d",
2639 "3045022100db9dc65291077a52728c622987e9895b7241d4394d6dcb916d7600a3e8728c22022036ee3ee717ba0bb5c45ee84bc7bbf85c0f90f26ae4e4a25a6b4241afa8a3f1cb",
2640 "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");
2642 test_htlc_output!(4,
2643 "3045022100cc28030b59f0914f45b84caa983b6f8effa900c952310708c2b5b00781117022022027ba2ccdf94d03c6d48b327f183f6e28c8a214d089b9227f94ac4f85315274f0",
2644 "304402202d1a3c0d31200265d2a2def2753ead4959ae20b4083e19553acfffa5dfab60bf022020ede134149504e15b88ab261a066de49848411e15e70f9e6a5462aec2949f8f",
2645 "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");
2649 // commitment tx with six outputs untrimmed (minimum feerate)
2650 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
2651 chan.feerate_per_kw = 648;
2653 test_commitment!("3044022072714e2fbb93cdd1c42eb0828b4f2eff143f717d8f26e79d6ada4f0dcb681bbe02200911be4e5161dd6ebe59ff1c58e1997c4aea804f81db6b698821db6093d7b057",
2654 "3045022100a2270d5950c89ae0841233f6efea9c951898b301b2e89e0adbd2c687b9f32efa02207943d90f95b9610458e7c65a576e149750ff3accaacad004cd85e70b235e27de",
2655 "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");
2657 assert_eq!(unsigned_tx.1.len(), 4);
2659 test_htlc_output!(0,
2660 "3044022062ef2e77591409d60d7817d9bb1e71d3c4a2931d1a6c7c8307422c84f001a251022022dad9726b0ae3fe92bda745a06f2c00f92342a186d84518588cf65f4dfaada8",
2661 "3045022100a4c574f00411dd2f978ca5cdc1b848c311cd7849c087ad2f21a5bce5e8cc5ae90220090ae39a9bce2fb8bc879d7e9f9022df249f41e25e51f1a9bf6447a9eeffc098",
2662 "02000000000101579c183eca9e8236a5d7f5dcd79cfec32c497fdc0ec61533cde99ecd436cadd10000000000000000000123060000000000002200204adb4e2f00643db396dd120d4e7dc17625f5f2c11a40d857accc862d6b7dd80e0500473044022062ef2e77591409d60d7817d9bb1e71d3c4a2931d1a6c7c8307422c84f001a251022022dad9726b0ae3fe92bda745a06f2c00f92342a186d84518588cf65f4dfaada801483045022100a4c574f00411dd2f978ca5cdc1b848c311cd7849c087ad2f21a5bce5e8cc5ae90220090ae39a9bce2fb8bc879d7e9f9022df249f41e25e51f1a9bf6447a9eeffc09801008576a91414011f7254d96b819c76986c277d115efce6f7b58763ac67210394854aa6eab5b2a8122cc726e9dded053a2184d88256816826d6231c068d4a5b7c820120876475527c21030d417a46946384f88d5f3337267c5e579765875dc4daca813e21734b140639e752ae67a914b43e1b38138a41b37f7cd9a1d274bc63e3a9b5d188ac6868f6010000");
2664 test_htlc_output!(1,
2665 "3045022100e968cbbb5f402ed389fdc7f6cd2a80ed650bb42c79aeb2a5678444af94f6c78502204b47a1cb24ab5b0b6fe69fe9cfc7dba07b9dd0d8b95f372c1d9435146a88f8d4",
2666 "304402207679cf19790bea76a733d2fa0672bd43ab455687a068f815a3d237581f57139a0220683a1a799e102071c206b207735ca80f627ab83d6616b4bcd017c5d79ef3e7d0",
2667 "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");
2669 test_htlc_output!(2,
2670 "3045022100aa91932e305292cf9969cc23502bbf6cef83a5df39c95ad04a707c4f4fed5c7702207099fc0f3a9bfe1e7683c0e9aa5e76c5432eb20693bf4cb182f04d383dc9c8c2",
2671 "304402200df76fea718745f3c529bac7fd37923e7309ce38b25c0781e4cf514dd9ef8dc802204172295739dbae9fe0474dcee3608e3433b4b2af3a2e6787108b02f894dcdda3",
2672 "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");
2674 test_htlc_output!(3,
2675 "3044022035cac88040a5bba420b1c4257235d5015309113460bc33f2853cd81ca36e632402202fc94fd3e81e9d34a9d01782a0284f3044370d03d60f3fc041e2da088d2de58f",
2676 "304402200daf2eb7afd355b4caf6fb08387b5f031940ea29d1a9f35071288a839c9039e4022067201b562456e7948616c13acb876b386b511599b58ac1d94d127f91c50463a6",
2677 "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");
2681 // commitment tx with six outputs untrimmed (maximum feerate)
2682 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
2683 chan.feerate_per_kw = 2069;
2685 test_commitment!("3044022001d55e488b8b035b2dd29d50b65b530923a416d47f377284145bc8767b1b6a75022019bb53ddfe1cefaf156f924777eaaf8fdca1810695a7d0a247ad2afba8232eb4",
2686 "304402203ca8f31c6a47519f83255dc69f1894d9a6d7476a19f498d31eaf0cd3a85eeb63022026fd92dc752b33905c4c838c528b692a8ad4ced959990b5d5ee2ff940fa90eea",
2687 "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");
2689 assert_eq!(unsigned_tx.1.len(), 4);
2691 test_htlc_output!(0,
2692 "3045022100d1cf354de41c1369336cf85b225ed033f1f8982a01be503668df756a7e668b66022001254144fb4d0eecc61908fccc3388891ba17c5d7a1a8c62bdd307e5a513f992",
2693 "3044022056eb1af429660e45a1b0b66568cb8c4a3aa7e4c9c292d5d6c47f86ebf2c8838f022065c3ac4ebe980ca7a41148569be4ad8751b0a724a41405697ec55035dae66402",
2694 "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");
2696 test_htlc_output!(1,
2697 "3045022100d065569dcb94f090345402736385efeb8ea265131804beac06dd84d15dd2d6880220664feb0b4b2eb985fadb6ec7dc58c9334ea88ce599a9be760554a2d4b3b5d9f4",
2698 "3045022100914bb232cd4b2690ee3d6cb8c3713c4ac9c4fb925323068d8b07f67c8541f8d9022057152f5f1615b793d2d45aac7518989ae4fe970f28b9b5c77504799d25433f7f",
2699 "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");
2701 test_htlc_output!(2,
2702 "3045022100d4e69d363de993684eae7b37853c40722a4c1b4a7b588ad7b5d8a9b5006137a102207a069c628170ee34be5612747051bdcc087466dbaa68d5756ea81c10155aef18",
2703 "304402200e362443f7af830b419771e8e1614fc391db3a4eb799989abfc5ab26d6fcd032022039ab0cad1c14dfbe9446bf847965e56fe016e0cbcf719fd18c1bfbf53ecbd9f9",
2704 "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");
2706 test_htlc_output!(3,
2707 "30450221008ec888e36e4a4b3dc2ed6b823319855b2ae03006ca6ae0d9aa7e24bfc1d6f07102203b0f78885472a67ff4fe5916c0bb669487d659527509516fc3a08e87a2cc0a7c",
2708 "304402202c3e14282b84b02705dfd00a6da396c9fe8a8bcb1d3fdb4b20a4feba09440e8b02202b058b39aa9b0c865b22095edcd9ff1f71bbfe20aa4993755e54d042755ed0d5",
2709 "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");
2713 // commitment tx with five outputs untrimmed (minimum feerate)
2714 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
2715 chan.feerate_per_kw = 2070;
2717 test_commitment!("3045022100f2377f7a67b7fc7f4e2c0c9e3a7de935c32417f5668eda31ea1db401b7dc53030220415fdbc8e91d0f735e70c21952342742e25249b0d062d43efbfc564499f37526",
2718 "30440220443cb07f650aebbba14b8bc8d81e096712590f524c5991ac0ed3bbc8fd3bd0c7022028a635f548e3ca64b19b69b1ea00f05b22752f91daf0b6dab78e62ba52eb7fd0",
2719 "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");
2721 assert_eq!(unsigned_tx.1.len(), 3);
2723 test_htlc_output!(0,
2724 "3045022100eed143b1ee4bed5dc3cde40afa5db3e7354cbf9c44054b5f713f729356f08cf7022077161d171c2bbd9badf3c9934de65a4918de03bbac1450f715275f75b103f891",
2725 "3045022100a0d043ed533e7fb1911e0553d31a8e2f3e6de19dbc035257f29d747c5e02f1f5022030cd38d8e84282175d49c1ebe0470db3ebd59768cf40780a784e248a43904fb8",
2726 "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");
2728 test_htlc_output!(1,
2729 "3044022071e9357619fd8d29a411dc053b326a5224c5d11268070e88ecb981b174747c7a02202b763ae29a9d0732fa8836dd8597439460b50472183f420021b768981b4f7cf6",
2730 "3045022100adb1d679f65f96178b59f23ed37d3b70443118f345224a07ecb043eee2acc157022034d24524fe857144a3bcfff3065a9994d0a6ec5f11c681e49431d573e242612d",
2731 "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");
2733 test_htlc_output!(2,
2734 "3045022100c9458a4d2cbb741705577deb0a890e5cb90ee141be0400d3162e533727c9cb2102206edcf765c5dc5e5f9b976ea8149bf8607b5a0efb30691138e1231302b640d2a4",
2735 "304402200831422aa4e1ee6d55e0b894201770a8f8817a189356f2d70be76633ffa6a6f602200dd1b84a4855dc6727dd46c98daae43dfc70889d1ba7ef0087529a57c06e5e04",
2736 "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");
2740 // commitment tx with five outputs untrimmed (maximum feerate)
2741 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
2742 chan.feerate_per_kw = 2194;
2744 test_commitment!("3045022100d33c4e541aa1d255d41ea9a3b443b3b822ad8f7f86862638aac1f69f8f760577022007e2a18e6931ce3d3a804b1c78eda1de17dbe1fb7a95488c9a4ec86203953348",
2745 "304402203b1b010c109c2ecbe7feb2d259b9c4126bd5dc99ee693c422ec0a5781fe161ba0220571fe4e2c649dea9c7aaf7e49b382962f6a3494963c97d80fef9a430ca3f7061",
2746 "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");
2748 assert_eq!(unsigned_tx.1.len(), 3);
2750 test_htlc_output!(0,
2751 "30450221009ed2f0a67f99e29c3c8cf45c08207b765980697781bb727fe0b1416de0e7622902206052684229bc171419ed290f4b615c943f819c0262414e43c5b91dcf72ddcf44",
2752 "3044022004ad5f04ae69c71b3b141d4db9d0d4c38d84009fb3cfeeae6efdad414487a9a0022042d3fe1388c1ff517d1da7fb4025663d372c14728ed52dc88608363450ff6a2f",
2753 "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");
2755 test_htlc_output!(1,
2756 "30440220155d3b90c67c33a8321996a9be5b82431b0c126613be751d400669da9d5c696702204318448bcd48824439d2c6a70be6e5747446be47ff45977cf41672bdc9b6b12d",
2757 "304402201707050c870c1f77cc3ed58d6d71bf281de239e9eabd8ef0955bad0d7fe38dcc02204d36d80d0019b3a71e646a08fa4a5607761d341ae8be371946ebe437c289c915",
2758 "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");
2760 test_htlc_output!(2,
2761 "3045022100a12a9a473ece548584aabdd051779025a5ed4077c4b7aa376ec7a0b1645e5a48022039490b333f53b5b3e2ddde1d809e492cba2b3e5fc3a436cd3ffb4cd3d500fa5a",
2762 "3045022100ff200bc934ab26ce9a559e998ceb0aee53bc40368e114ab9d3054d9960546e2802202496856ca163ac12c143110b6b3ac9d598df7254f2e17b3b94c3ab5301f4c3b0",
2763 "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");
2767 // commitment tx with four outputs untrimmed (minimum feerate)
2768 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
2769 chan.feerate_per_kw = 2195;
2771 test_commitment!("304402205e2f76d4657fb732c0dfc820a18a7301e368f5799e06b7828007633741bda6df0220458009ae59d0c6246065c419359e05eb2a4b4ef4a1b310cc912db44eb7924298",
2772 "304402203b12d44254244b8ff3bb4129b0920fd45120ab42f553d9976394b099d500c99e02205e95bb7a3164852ef0c48f9e0eaf145218f8e2c41251b231f03cbdc4f29a5429",
2773 "02000000000101bef67e4e2fb9ddeeb3461973cd4c62abb35050b1add772995b820b584a488489000000000038b02b8004b80b000000000000220020c20b5d1f8584fd90443e7b7b720136174fa4b9333c261d04dbbd012635c0f419a00f0000000000002200208c48d15160397c9731df9bc3b236656efb6665fbfe92b4a6878e88a499f741c4c0c62d0000000000160014ccf1af2f2aabee14bb40fa3851ab2301de843110b8976a00000000002200204adb4e2f00643db396dd120d4e7dc17625f5f2c11a40d857accc862d6b7dd80e040047304402203b12d44254244b8ff3bb4129b0920fd45120ab42f553d9976394b099d500c99e02205e95bb7a3164852ef0c48f9e0eaf145218f8e2c41251b231f03cbdc4f29a54290147304402205e2f76d4657fb732c0dfc820a18a7301e368f5799e06b7828007633741bda6df0220458009ae59d0c6246065c419359e05eb2a4b4ef4a1b310cc912db44eb792429801475221023da092f6980e58d2c037173180e9a465476026ee50f96695963e8efe436f54eb21030e9f7b623d2ccc7c9bd44d66d5ce21ce504c0acf6385a132cec6d3c39fa711c152ae3e195220");
2775 assert_eq!(unsigned_tx.1.len(), 2);
2777 test_htlc_output!(0,
2778 "3045022100a8a78fa1016a5c5c3704f2e8908715a3cef66723fb95f3132ec4d2d05cd84fb4022025ac49287b0861ec21932405f5600cbce94313dbde0e6c5d5af1b3366d8afbfc",
2779 "3045022100be6ae1977fd7b630a53623f3f25c542317ccfc2b971782802a4f1ef538eb22b402207edc4d0408f8f38fd3c7365d1cfc26511b7cd2d4fecd8b005fba3cd5bc704390",
2780 "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");
2782 test_htlc_output!(1,
2783 "3045022100e769cb156aa2f7515d126cef7a69968629620ce82afcaa9e210969de6850df4602200b16b3f3486a229a48aadde520dbee31ae340dbadaffae74fbb56681fef27b92",
2784 "30440220665b9cb4a978c09d1ca8977a534999bc8a49da624d0c5439451dd69cde1a003d022070eae0620f01f3c1bd029cc1488da13fb40fdab76f396ccd335479a11c5276d8",
2785 "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");
2789 // commitment tx with four outputs untrimmed (maximum feerate)
2790 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
2791 chan.feerate_per_kw = 3702;
2793 test_commitment!("3045022100c1a3b0b60ca092ed5080121f26a74a20cec6bdee3f8e47bae973fcdceb3eda5502207d467a9873c939bf3aa758014ae67295fedbca52412633f7e5b2670fc7c381c1",
2794 "304402200e930a43c7951162dc15a2b7344f48091c74c70f7024e7116e900d8bcfba861c022066fa6cbda3929e21daa2e7e16a4b948db7e8919ef978402360d1095ffdaff7b0",
2795 "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");
2797 assert_eq!(unsigned_tx.1.len(), 2);
2799 test_htlc_output!(0,
2800 "3045022100dfb73b4fe961b31a859b2bb1f4f15cabab9265016dd0272323dc6a9e85885c54022059a7b87c02861ee70662907f25ce11597d7b68d3399443a831ae40e777b76bdb",
2801 "304402202765b9c9ece4f127fa5407faf66da4c5ce2719cdbe47cd3175fc7d48b482e43d02205605125925e07bad1e41c618a4b434d72c88a164981c4b8af5eaf4ee9142ec3a",
2802 "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");
2804 test_htlc_output!(1,
2805 "3045022100ea9dc2a7c3c3640334dab733bb4e036e32a3106dc707b24227874fa4f7da746802204d672f7ac0fe765931a8df10b81e53a3242dd32bd9dc9331eb4a596da87954e9",
2806 "30440220048a41c660c4841693de037d00a407810389f4574b3286afb7bc392a438fa3f802200401d71fa87c64fe621b49ac07e3bf85157ac680acb977124da28652cc7f1a5c",
2807 "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");
2811 // commitment tx with three outputs untrimmed (minimum feerate)
2812 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
2813 chan.feerate_per_kw = 3703;
2815 test_commitment!("30450221008b7c191dd46893b67b628e618d2dc8e81169d38bade310181ab77d7c94c6675e02203b4dd131fd7c9deb299560983dcdc485545c98f989f7ae8180c28289f9e6bdb0",
2816 "3044022047305531dd44391dce03ae20f8735005c615eb077a974edb0059ea1a311857d602202e0ed6972fbdd1e8cb542b06e0929bc41b2ddf236e04cb75edd56151f4197506",
2817 "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");
2819 assert_eq!(unsigned_tx.1.len(), 1);
2821 test_htlc_output!(0,
2822 "3044022044f65cf833afdcb9d18795ca93f7230005777662539815b8a601eeb3e57129a902206a4bf3e53392affbba52640627defa8dc8af61c958c9e827b2798ab45828abdd",
2823 "3045022100b94d931a811b32eeb885c28ddcf999ae1981893b21dd1329929543fe87ce793002206370107fdd151c5f2384f9ceb71b3107c69c74c8ed5a28a94a4ab2d27d3b0724",
2824 "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");
2828 // commitment tx with three outputs untrimmed (maximum feerate)
2829 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
2830 chan.feerate_per_kw = 4914;
2832 test_commitment!("304402206d6cb93969d39177a09d5d45b583f34966195b77c7e585cf47ac5cce0c90cefb022031d71ae4e33a4e80df7f981d696fbdee517337806a3c7138b7491e2cbb077a0e",
2833 "304402206a2679efa3c7aaffd2a447fd0df7aba8792858b589750f6a1203f9259173198a022008d52a0e77a99ab533c36206cb15ad7aeb2aa72b93d4b571e728cb5ec2f6fe26",
2834 "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");
2836 assert_eq!(unsigned_tx.1.len(), 1);
2838 test_htlc_output!(0,
2839 "3045022100fcb38506bfa11c02874092a843d0cc0a8613c23b639832564a5f69020cb0f6ba02206508b9e91eaa001425c190c68ee5f887e1ad5b1b314002e74db9dbd9e42dbecf",
2840 "304502210086e76b460ddd3cea10525fba298405d3fe11383e56966a5091811368362f689a02200f72ee75657915e0ede89c28709acd113ede9e1b7be520e3bc5cda425ecd6e68",
2841 "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");
2845 // commitment tx with two outputs untrimmed (minimum feerate)
2846 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
2847 chan.feerate_per_kw = 4915;
2849 test_commitment!("304402200769ba89c7330dfa4feba447b6e322305f12ac7dac70ec6ba997ed7c1b598d0802204fe8d337e7fee781f9b7b1a06e580b22f4f79d740059560191d7db53f8765552",
2850 "3045022100a012691ba6cea2f73fa8bac37750477e66363c6d28813b0bb6da77c8eb3fb0270220365e99c51304b0b1a6ab9ea1c8500db186693e39ec1ad5743ee231b0138384b9",
2851 "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");
2853 assert_eq!(unsigned_tx.1.len(), 0);
2857 // commitment tx with two outputs untrimmed (maximum feerate)
2858 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
2859 chan.feerate_per_kw = 9651180;
2861 test_commitment!("3044022037f83ff00c8e5fb18ae1f918ffc24e54581775a20ff1ae719297ef066c71caa9022039c529cccd89ff6c5ed1db799614533844bd6d101da503761c45c713996e3bbd",
2862 "30440220514f977bf7edc442de8ce43ace9686e5ebdc0f893033f13e40fb46c8b8c6e1f90220188006227d175f5c35da0b092c57bea82537aed89f7778204dc5bacf4f29f2b9",
2863 "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");
2865 assert_eq!(unsigned_tx.1.len(), 0);
2869 // commitment tx with one output untrimmed (minimum feerate)
2870 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
2871 chan.feerate_per_kw = 9651181;
2873 test_commitment!("3044022064901950be922e62cbe3f2ab93de2b99f37cff9fc473e73e394b27f88ef0731d02206d1dfa227527b4df44a07599289e207d6fd9cca60c0365682dcd3deaf739567e",
2874 "3044022031a82b51bd014915fe68928d1abf4b9885353fb896cac10c3fdd88d7f9c7f2e00220716bda819641d2c63e65d3549b6120112e1aeaf1742eed94a471488e79e206b1",
2875 "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");
2877 assert_eq!(unsigned_tx.1.len(), 0);
2881 // commitment tx with fee greater than funder amount
2882 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
2883 chan.feerate_per_kw = 9651936;
2885 test_commitment!("3044022064901950be922e62cbe3f2ab93de2b99f37cff9fc473e73e394b27f88ef0731d02206d1dfa227527b4df44a07599289e207d6fd9cca60c0365682dcd3deaf739567e",
2886 "3044022031a82b51bd014915fe68928d1abf4b9885353fb896cac10c3fdd88d7f9c7f2e00220716bda819641d2c63e65d3549b6120112e1aeaf1742eed94a471488e79e206b1",
2887 "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");
2889 assert_eq!(unsigned_tx.1.len(), 0);
2894 fn test_per_commitment_secret_gen() {
2895 // Test vectors from BOLT 3 Appendix D:
2897 let mut seed = [0; 32];
2898 seed[0..32].clone_from_slice(&hex::decode("0000000000000000000000000000000000000000000000000000000000000000").unwrap());
2899 assert_eq!(chan_utils::build_commitment_secret(seed, 281474976710655),
2900 hex::decode("02a40c85b6f28da08dfdbe0926c53fab2de6d28c10301f8f7c4073d5e42e3148").unwrap()[..]);
2902 seed[0..32].clone_from_slice(&hex::decode("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF").unwrap());
2903 assert_eq!(chan_utils::build_commitment_secret(seed, 281474976710655),
2904 hex::decode("7cc854b54e3e0dcdb010d7a3fee464a9687be6e8db3be6854c475621e007a5dc").unwrap()[..]);
2906 assert_eq!(chan_utils::build_commitment_secret(seed, 0xaaaaaaaaaaa),
2907 hex::decode("56f4008fb007ca9acf0e15b054d5c9fd12ee06cea347914ddbaed70d1c13a528").unwrap()[..]);
2909 assert_eq!(chan_utils::build_commitment_secret(seed, 0x555555555555),
2910 hex::decode("9015daaeb06dba4ccc05b91b2f73bd54405f2be9f217fbacd3c5ac2e62327d31").unwrap()[..]);
2912 seed[0..32].clone_from_slice(&hex::decode("0101010101010101010101010101010101010101010101010101010101010101").unwrap());
2913 assert_eq!(chan_utils::build_commitment_secret(seed, 1),
2914 hex::decode("915c75942a26bb3a433a8ce2cb0427c29ec6c1775cfc78328b57f6ba7bfeaa9c").unwrap()[..]);
2918 fn test_key_derivation() {
2919 // Test vectors from BOLT 3 Appendix E:
2920 let secp_ctx = Secp256k1::new();
2922 let base_secret = SecretKey::from_slice(&secp_ctx, &hex::decode("000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f").unwrap()[..]).unwrap();
2923 let per_commitment_secret = SecretKey::from_slice(&secp_ctx, &hex::decode("1f1e1d1c1b1a191817161514131211100f0e0d0c0b0a09080706050403020100").unwrap()[..]).unwrap();
2925 let base_point = PublicKey::from_secret_key(&secp_ctx, &base_secret).unwrap();
2926 assert_eq!(base_point.serialize()[..], hex::decode("036d6caac248af96f6afa7f904f550253a0f3ef3f5aa2fe6838a95b216691468e2").unwrap()[..]);
2928 let per_commitment_point = PublicKey::from_secret_key(&secp_ctx, &per_commitment_secret).unwrap();
2929 assert_eq!(per_commitment_point.serialize()[..], hex::decode("025f7117a78150fe2ef97db7cfc83bd57b2e2c0d0dd25eaf467a4a1c2a45ce1486").unwrap()[..]);
2931 assert_eq!(chan_utils::derive_public_key(&secp_ctx, &per_commitment_point, &base_point).unwrap().serialize()[..],
2932 hex::decode("0235f2dbfaa89b57ec7b055afe29849ef7ddfeb1cefdb9ebdc43f5494984db29e5").unwrap()[..]);
2934 assert_eq!(chan_utils::derive_private_key(&secp_ctx, &per_commitment_point, &base_secret).unwrap(),
2935 SecretKey::from_slice(&secp_ctx, &hex::decode("cbced912d3b21bf196a766651e436aff192362621ce317704ea2f75d87e7be0f").unwrap()[..]).unwrap());
2937 assert_eq!(chan_utils::derive_public_revocation_key(&secp_ctx, &per_commitment_point, &base_point).unwrap().serialize()[..],
2938 hex::decode("02916e326636d19c33f13e8c0c3a03dd157f332f3e99c317c141dd865eb01f8ff0").unwrap()[..]);
2940 assert_eq!(chan_utils::derive_private_revocation_key(&secp_ctx, &per_commitment_secret, &base_secret).unwrap(),
2941 SecretKey::from_slice(&secp_ctx, &hex::decode("d09ffff62ddb2297ab000cc85bcb4283fdeb6aa052affbc9dddcf33b61078110").unwrap()[..]).unwrap());