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::uint::Uint256;
6 use bitcoin::util::hash::{Sha256dHash, Hash160};
7 use bitcoin::util::bip143;
8 use bitcoin::network::serialize::BitcoinHash;
10 use secp256k1::key::{PublicKey,SecretKey};
11 use secp256k1::{Secp256k1,Message,Signature};
14 use crypto::digest::Digest;
15 use crypto::hkdf::{hkdf_extract,hkdf_expand};
18 use ln::msgs::{HandleError, MsgEncodable};
19 use ln::channelmonitor::ChannelMonitor;
20 use ln::channelmanager::PendingForwardHTLCInfo;
21 use ln::chan_utils::{TxCreationKeys,HTLCOutputInCommitment};
23 use chain::chaininterface::{FeeEstimator,ConfirmationTarget};
24 use util::{transaction_utils,rng};
25 use util::sha2::Sha256;
27 use std::default::Default;
29 use std::time::Instant;
31 pub struct ChannelKeys {
32 pub funding_key: SecretKey,
33 pub revocation_base_key: SecretKey,
34 pub payment_base_key: SecretKey,
35 pub delayed_payment_base_key: SecretKey,
36 pub htlc_base_key: SecretKey,
37 pub channel_close_key: SecretKey,
38 pub channel_monitor_claim_key: SecretKey,
39 pub commitment_seed: [u8; 32],
43 pub fn new_from_seed(seed: &[u8; 32]) -> Result<ChannelKeys, secp256k1::Error> {
44 let mut prk = [0; 32];
45 hkdf_extract(Sha256::new(), b"rust-lightning key gen salt", seed, &mut prk);
46 let secp_ctx = Secp256k1::new();
48 let mut okm = [0; 32];
49 hkdf_expand(Sha256::new(), &prk, b"rust-lightning funding key info", &mut okm);
50 let funding_key = SecretKey::from_slice(&secp_ctx, &okm)?;
52 hkdf_expand(Sha256::new(), &prk, b"rust-lightning revocation base key info", &mut okm);
53 let revocation_base_key = SecretKey::from_slice(&secp_ctx, &okm)?;
55 hkdf_expand(Sha256::new(), &prk, b"rust-lightning payment base key info", &mut okm);
56 let payment_base_key = SecretKey::from_slice(&secp_ctx, &okm)?;
58 hkdf_expand(Sha256::new(), &prk, b"rust-lightning delayed payment base key info", &mut okm);
59 let delayed_payment_base_key = SecretKey::from_slice(&secp_ctx, &okm)?;
61 hkdf_expand(Sha256::new(), &prk, b"rust-lightning htlc base key info", &mut okm);
62 let htlc_base_key = SecretKey::from_slice(&secp_ctx, &okm)?;
64 hkdf_expand(Sha256::new(), &prk, b"rust-lightning channel close key info", &mut okm);
65 let channel_close_key = SecretKey::from_slice(&secp_ctx, &okm)?;
67 hkdf_expand(Sha256::new(), &prk, b"rust-lightning channel monitor claim key info", &mut okm);
68 let channel_monitor_claim_key = SecretKey::from_slice(&secp_ctx, &okm)?;
70 hkdf_expand(Sha256::new(), &prk, b"rust-lightning local commitment seed info", &mut okm);
73 funding_key: funding_key,
74 revocation_base_key: revocation_base_key,
75 payment_base_key: payment_base_key,
76 delayed_payment_base_key: delayed_payment_base_key,
77 htlc_base_key: htlc_base_key,
78 channel_close_key: channel_close_key,
79 channel_monitor_claim_key: channel_monitor_claim_key,
93 outbound: bool, // ie to an HTLC-Timeout transaction
97 payment_hash: [u8; 32],
99 // state == RemoteAnnounced implies pending_forward_state, otherwise it must be None
100 pending_forward_state: Option<PendingForwardHTLCInfo>,
104 fn get_in_commitment(&self, offered: bool) -> HTLCOutputInCommitment {
105 HTLCOutputInCommitment {
107 amount_msat: self.amount_msat,
108 cltv_expiry: self.cltv_expiry,
109 payment_hash: self.payment_hash,
110 transaction_output_index: 0
115 /// See AwaitingRemoteRevoke ChannelState for more info
116 struct HTLCOutputAwaitingACK {
120 payment_hash: [u8; 32],
121 onion_routing_packet: msgs::OnionPacket,
122 time_created: Instant, //TODO: Some kind of timeout thing-a-majig
126 /// Implies we have (or are prepared to) send our open_channel/accept_channel message
127 OurInitSent = (1 << 0),
128 /// Implies we have received their open_channel/accept_channel message
129 TheirInitSent = (1 << 1),
130 /// We have sent funding_created and are awaiting a funding_signed to advance to FundingSent.
131 /// Note that this is nonsense for an inbound channel as we immediately generate funding_signed
132 /// upon receipt of funding_created, so simply skip this state.
134 /// Set when we have received/sent funding_created and funding_signed and are thus now waiting
135 /// on the funding transaction to confirm. The FundingLocked flags are set to indicate when we
136 /// and our counterparty consider the funding transaction confirmed.
138 /// Flag which can be set on FundingSent to indicate they sent us a funding_locked message.
139 /// Once both TheirFundingLocked and OurFundingLocked are set, state moves on to ChannelFunded.
140 TheirFundingLocked = (1 << 4),
141 /// Flag which can be set on FundingSent to indicate we sent them a funding_locked message.
142 /// Once both TheirFundingLocked and OurFundingLocked are set, state moves on to ChannelFunded.
143 OurFundingLocked = (1 << 5),
145 /// Flag which implies that we have sent a commitment_signed but are awaiting the responding
146 /// revoke_and_ack message. During this time period, we can't generate new commitment_signed
147 /// messages as then we will be unable to determine which HTLCs they included in their
148 /// revoke_and_ack implicit ACK, so instead we have to hold them away temporarily to be sent
150 /// Flag is set on ChannelFunded.
151 AwaitingRemoteRevoke = (1 << 7),
152 /// Flag which is set on ChannelFunded or FundingSent after receiving a shutdown message from
153 /// the remote end. If set, they may not add any new HTLCs to the channel, and we are expected
154 /// to respond with our own shutdown message when possible.
155 RemoteShutdownSent = (1 << 8),
156 /// Flag which is set on ChannelFunded or FundingSent after sending a shutdown message. At this
157 /// point, we may not add any new HTLCs to the channel.
158 /// TODO: Investigate some kind of timeout mechanism by which point the remote end must provide
159 /// us their shutdown.
160 LocalShutdownSent = (1 << 9),
161 /// We've successfully negotiated a closing_signed dance. At this point ChannelManager is about
162 /// to drop us, but we store this anyway.
163 ShutdownComplete = (1 << 10),
165 const BOTH_SIDES_SHUTDOWN_MASK: u32 = (ChannelState::LocalShutdownSent as u32 | ChannelState::RemoteShutdownSent as u32);
167 // TODO: We should refactor this to be an Inbound/OutboundChannel until initial setup handshaking
168 // has been completed, and then turn into a Channel to get compiler-time enforcement of things like
169 // calling get_channel_id() before we're set up or things like get_outbound_funding_signed on an
176 channel_outbound: bool,
178 announce_publicly: bool,
179 channel_value_satoshis: u64,
181 local_keys: ChannelKeys,
183 cur_local_commitment_transaction_number: u64,
184 cur_remote_commitment_transaction_number: u64,
185 value_to_self_msat: u64, // Excluding all pending_htlcs, excluding fees
186 pending_htlcs: Vec<HTLCOutput>,
187 holding_cell_htlcs: Vec<HTLCOutputAwaitingACK>,
188 next_local_htlc_id: u64,
189 next_remote_htlc_id: u64,
190 channel_update_count: u32,
193 last_sent_closing_fee: Option<(u64, u64)>, // (feerate, fee)
195 /// The hash of the block in which the funding transaction reached our CONF_TARGET. We use this
196 /// to detect unconfirmation after a serialize-unserialize roudtrip where we may not see a full
197 /// series of block_connected/block_disconnected calls. Obviously this is not a guarantee as we
198 /// could miss the funding_tx_confirmed_in block as well, but it serves as a useful fallback.
199 funding_tx_confirmed_in: Sha256dHash,
200 short_channel_id: Option<u64>,
201 /// Used to deduplicate block_connected callbacks
202 last_block_connected: Sha256dHash,
203 funding_tx_confirmations: u64,
205 their_dust_limit_satoshis: u64,
206 our_dust_limit_satoshis: u64,
207 their_max_htlc_value_in_flight_msat: u64,
208 //get_our_max_htlc_value_in_flight_msat(): u64,
209 their_channel_reserve_satoshis: u64,
210 //get_our_channel_reserve_satoshis(): u64,
211 their_htlc_minimum_msat: u64,
212 our_htlc_minimum_msat: u64,
213 their_to_self_delay: u16,
214 //implied by BREAKDOWN_TIMEOUT: our_to_self_delay: u16,
215 their_max_accepted_htlcs: u16,
216 //implied by OUR_MAX_HTLCS: our_max_accepted_htlcs: u16,
218 their_funding_pubkey: PublicKey,
219 their_revocation_basepoint: PublicKey,
220 their_payment_basepoint: PublicKey,
221 their_delayed_payment_basepoint: PublicKey,
222 their_htlc_basepoint: PublicKey,
223 their_cur_commitment_point: PublicKey,
224 their_node_id: PublicKey,
226 their_shutdown_scriptpubkey: Option<Script>,
228 channel_monitor: ChannelMonitor,
231 const OUR_MAX_HTLCS: u16 = 5; //TODO
232 const CONF_TARGET: u32 = 12; //TODO: Should be much higher
233 /// Confirmation count threshold at which we close a channel. Ideally we'd keep the channel around
234 /// on ice until the funding transaction gets more confirmations, but the LN protocol doesn't
235 /// really allow for this, so instead we're stuck closing it out at that point.
236 const UNCONF_THRESHOLD: u32 = 6;
237 /// The amount of time we require our counterparty wait to claim their money (ie time between when
238 /// we, or our watchtower, must check for them having broadcast a theft transaction).
239 const BREAKDOWN_TIMEOUT: u16 = 6 * 24 * 7; //TODO?
240 /// The amount of time we're willing to wait to claim money back to us
241 const MAX_LOCAL_BREAKDOWN_TIMEOUT: u16 = 6 * 24 * 14;
242 const COMMITMENT_TX_BASE_WEIGHT: u64 = 724;
243 const COMMITMENT_TX_WEIGHT_PER_HTLC: u64 = 172;
244 const HTLC_SUCCESS_TX_WEIGHT: u64 = 703;
245 const HTLC_TIMEOUT_TX_WEIGHT: u64 = 663;
246 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
247 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?)
249 macro_rules! secp_call {
250 ( $res: expr, $err: expr ) => {
253 //TODO: make the error a parameter
254 Err(_) => return Err(HandleError{err: $err, msg: Some(msgs::ErrorAction::DisconnectPeer{})})
259 macro_rules! secp_derived_key {
261 secp_call!($res, "Derived invalid key, peer is maliciously selecting parameters")
265 // Convert constants + channel value to limits:
266 fn get_our_max_htlc_value_in_flight_msat(channel_value_satoshis: u64) -> u64 {
267 channel_value_satoshis * 1000 / 10 //TODO
270 /// Guaranteed to return a value no larger than channel_value_satoshis
271 fn get_our_channel_reserve_satoshis(channel_value_satoshis: u64) -> u64 {
272 cmp::min(channel_value_satoshis, 10) //TODO
275 fn derive_our_dust_limit_satoshis(at_open_background_feerate: u64) -> u64 {
276 at_open_background_feerate * B_OUTPUT_PLUS_SPENDING_INPUT_WEIGHT //TODO
279 fn derive_our_htlc_minimum_msat(_at_open_channel_feerate_per_kw: u64) -> u64 {
285 /// panics if channel_value_satoshis is >= (1 << 24)
286 pub fn new_outbound(fee_estimator: &FeeEstimator, their_node_id: PublicKey, channel_value_satoshis: u64, announce_publicly: bool, user_id: u64) -> Channel {
287 if channel_value_satoshis >= (1 << 24) {
288 panic!("funding value > 2^24");
291 let feerate = fee_estimator.get_est_sat_per_vbyte(ConfirmationTarget::Normal);
292 let background_feerate = fee_estimator.get_est_sat_per_vbyte(ConfirmationTarget::Background);
294 let mut key_seed = [0u8; 32];
295 rng::fill_bytes(&mut key_seed);
296 let chan_keys = match ChannelKeys::new_from_seed(&key_seed) {
298 Err(_) => panic!("RNG is busted!")
301 let secp_ctx = Secp256k1::new();
302 let our_channel_monitor_claim_key_hash = Hash160::from_data(&PublicKey::from_secret_key(&secp_ctx, &chan_keys.channel_monitor_claim_key).unwrap().serialize());
303 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();
304 let channel_monitor = ChannelMonitor::new(&chan_keys.revocation_base_key,
305 &PublicKey::from_secret_key(&secp_ctx, &chan_keys.delayed_payment_base_key).unwrap(),
306 &PublicKey::from_secret_key(&secp_ctx, &chan_keys.htlc_base_key).unwrap(),
307 BREAKDOWN_TIMEOUT, our_channel_monitor_claim_script);
312 channel_id: rng::rand_uint256(),
313 channel_state: ChannelState::OurInitSent as u32,
314 channel_outbound: true,
316 announce_publicly: announce_publicly,
317 channel_value_satoshis: channel_value_satoshis,
319 local_keys: chan_keys,
320 cur_local_commitment_transaction_number: (1 << 48) - 1,
321 cur_remote_commitment_transaction_number: (1 << 48) - 1,
322 value_to_self_msat: channel_value_satoshis * 1000, //TODO: give them something on open? Parameterize it?
323 pending_htlcs: Vec::new(),
324 holding_cell_htlcs: Vec::new(),
325 next_local_htlc_id: 0,
326 next_remote_htlc_id: 0,
327 channel_update_count: 0,
329 last_sent_closing_fee: None,
331 funding_tx_confirmed_in: Default::default(),
332 short_channel_id: None,
333 last_block_connected: Default::default(),
334 funding_tx_confirmations: 0,
336 feerate_per_kw: feerate * 250,
337 their_dust_limit_satoshis: 0,
338 our_dust_limit_satoshis: Channel::derive_our_dust_limit_satoshis(background_feerate),
339 their_max_htlc_value_in_flight_msat: 0,
340 their_channel_reserve_satoshis: 0,
341 their_htlc_minimum_msat: 0,
342 our_htlc_minimum_msat: Channel::derive_our_htlc_minimum_msat(feerate * 250),
343 their_to_self_delay: 0,
344 their_max_accepted_htlcs: 0,
346 their_funding_pubkey: PublicKey::new(),
347 their_revocation_basepoint: PublicKey::new(),
348 their_payment_basepoint: PublicKey::new(),
349 their_delayed_payment_basepoint: PublicKey::new(),
350 their_htlc_basepoint: PublicKey::new(),
351 their_cur_commitment_point: PublicKey::new(),
352 their_node_id: their_node_id,
354 their_shutdown_scriptpubkey: None,
356 channel_monitor: channel_monitor,
360 fn check_remote_fee(fee_estimator: &FeeEstimator, feerate_per_kw: u32) -> Result<(), HandleError> {
361 if (feerate_per_kw as u64) < fee_estimator.get_est_sat_per_vbyte(ConfirmationTarget::Background) * 250 {
362 return Err(HandleError{err: "Peer's feerate much too low", msg: Some(msgs::ErrorAction::DisconnectPeer{})});
364 if (feerate_per_kw as u64) > fee_estimator.get_est_sat_per_vbyte(ConfirmationTarget::HighPriority) * 375 { // 375 = 250 * 1.5x
365 return Err(HandleError{err: "Peer's feerate much too high", msg: Some(msgs::ErrorAction::DisconnectPeer{})});
370 /// Creates a new channel from a remote sides' request for one.
371 /// Assumes chain_hash has already been checked and corresponds with what we expect!
372 /// Generally prefers to take the DisconnectPeer action on failure, as a notice to the sender
373 /// that we're rejecting the new channel.
374 pub fn new_from_req(fee_estimator: &FeeEstimator, their_node_id: PublicKey, msg: &msgs::OpenChannel, user_id: u64, announce_publicly: bool) -> Result<Channel, HandleError> {
375 // Check sanity of message fields:
376 if msg.funding_satoshis >= (1 << 24) {
377 return Err(HandleError{err: "funding value > 2^24", msg: Some(msgs::ErrorAction::DisconnectPeer{})});
379 if msg.funding_satoshis > 21000000 * 100000000 {
380 return Err(HandleError{err: "More funding_satoshis than there are satoshis!", msg: Some(msgs::ErrorAction::DisconnectPeer{})});
382 if msg.channel_reserve_satoshis > msg.funding_satoshis {
383 return Err(HandleError{err: "Bogus channel_reserve_satoshis", msg: Some(msgs::ErrorAction::DisconnectPeer{})});
385 if msg.push_msat > (msg.funding_satoshis - msg.channel_reserve_satoshis) * 1000 {
386 return Err(HandleError{err: "push_msat more than highest possible value", msg: Some(msgs::ErrorAction::DisconnectPeer{})});
388 if msg.dust_limit_satoshis > msg.funding_satoshis {
389 return Err(HandleError{err: "Peer never wants payout outputs?", msg: Some(msgs::ErrorAction::DisconnectPeer{})});
391 if msg.max_htlc_value_in_flight_msat > msg.funding_satoshis * 1000 {
392 return Err(HandleError{err: "Bogus max_htlc_value_in_flight_satoshis", msg: Some(msgs::ErrorAction::DisconnectPeer{})});
394 if msg.htlc_minimum_msat >= (msg.funding_satoshis - msg.channel_reserve_satoshis) * 1000 {
395 return Err(HandleError{err: "Minimum htlc value is full channel value", msg: Some(msgs::ErrorAction::DisconnectPeer{})});
397 Channel::check_remote_fee(fee_estimator, msg.feerate_per_kw)?;
398 if msg.to_self_delay > MAX_LOCAL_BREAKDOWN_TIMEOUT {
399 return Err(HandleError{err: "They wanted our payments to be delayed by a needlessly long period", msg: Some(msgs::ErrorAction::DisconnectPeer{})});
401 if msg.max_accepted_htlcs < 1 {
402 return Err(HandleError{err: "0 max_accpted_htlcs makes for a useless channel", msg: Some(msgs::ErrorAction::DisconnectPeer{})});
404 if (msg.channel_flags & 254) != 0 {
405 return Err(HandleError{err: "unknown channel_flags", msg: Some(msgs::ErrorAction::DisconnectPeer{})});
408 // Convert things into internal flags and prep our state:
410 let their_announce = if (msg.channel_flags & 1) == 1 { true } else { false };
412 let background_feerate = fee_estimator.get_est_sat_per_vbyte(ConfirmationTarget::Background);
414 let mut key_seed = [0u8; 32];
415 rng::fill_bytes(&mut key_seed);
416 let chan_keys = match ChannelKeys::new_from_seed(&key_seed) {
418 Err(_) => panic!("RNG is busted!")
421 let secp_ctx = Secp256k1::new();
422 let our_channel_monitor_claim_key_hash = Hash160::from_data(&PublicKey::from_secret_key(&secp_ctx, &chan_keys.channel_monitor_claim_key).unwrap().serialize());
423 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();
424 let mut channel_monitor = ChannelMonitor::new(&chan_keys.revocation_base_key,
425 &PublicKey::from_secret_key(&secp_ctx, &chan_keys.delayed_payment_base_key).unwrap(),
426 &PublicKey::from_secret_key(&secp_ctx, &chan_keys.htlc_base_key).unwrap(),
427 BREAKDOWN_TIMEOUT, our_channel_monitor_claim_script);
428 channel_monitor.set_their_htlc_base_key(&msg.htlc_basepoint);
430 let mut chan = Channel {
433 channel_id: msg.temporary_channel_id,
434 channel_state: (ChannelState::OurInitSent as u32) | (ChannelState::TheirInitSent as u32),
435 channel_outbound: false,
437 announce_publicly: their_announce && announce_publicly,
439 local_keys: chan_keys,
440 cur_local_commitment_transaction_number: (1 << 48) - 1,
441 cur_remote_commitment_transaction_number: (1 << 48) - 1,
442 value_to_self_msat: msg.push_msat,
443 pending_htlcs: Vec::new(),
444 holding_cell_htlcs: Vec::new(),
445 next_local_htlc_id: 0,
446 next_remote_htlc_id: 0,
447 channel_update_count: 0,
449 last_sent_closing_fee: None,
451 funding_tx_confirmed_in: Default::default(),
452 short_channel_id: None,
453 last_block_connected: Default::default(),
454 funding_tx_confirmations: 0,
456 feerate_per_kw: msg.feerate_per_kw as u64,
457 channel_value_satoshis: msg.funding_satoshis,
458 their_dust_limit_satoshis: msg.dust_limit_satoshis,
459 our_dust_limit_satoshis: Channel::derive_our_dust_limit_satoshis(background_feerate),
460 their_max_htlc_value_in_flight_msat: msg.max_htlc_value_in_flight_msat,
461 their_channel_reserve_satoshis: msg.channel_reserve_satoshis,
462 their_htlc_minimum_msat: msg.htlc_minimum_msat,
463 our_htlc_minimum_msat: Channel::derive_our_htlc_minimum_msat(msg.feerate_per_kw as u64),
464 their_to_self_delay: msg.to_self_delay,
465 their_max_accepted_htlcs: msg.max_accepted_htlcs,
467 their_funding_pubkey: msg.funding_pubkey,
468 their_revocation_basepoint: msg.revocation_basepoint,
469 their_payment_basepoint: msg.payment_basepoint,
470 their_delayed_payment_basepoint: msg.delayed_payment_basepoint,
471 their_htlc_basepoint: msg.htlc_basepoint,
472 their_cur_commitment_point: msg.first_per_commitment_point,
473 their_node_id: their_node_id,
475 their_shutdown_scriptpubkey: None,
477 channel_monitor: channel_monitor,
480 let obscure_factor = chan.get_commitment_transaction_number_obscure_factor();
481 chan.channel_monitor.set_commitment_obscure_factor(obscure_factor);
486 // Utilities to derive keys:
488 fn build_local_commitment_secret(&self, idx: u64) -> SecretKey {
489 let res = chan_utils::build_commitment_secret(self.local_keys.commitment_seed, idx);
490 SecretKey::from_slice(&self.secp_ctx, &res).unwrap()
493 // Utilities to build transactions:
495 fn get_commitment_transaction_number_obscure_factor(&self) -> u64 {
496 let mut sha = Sha256::new();
497 let our_payment_basepoint = PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.payment_base_key).unwrap();
499 if self.channel_outbound {
500 sha.input(&our_payment_basepoint.serialize());
501 sha.input(&self.their_payment_basepoint.serialize());
503 sha.input(&self.their_payment_basepoint.serialize());
504 sha.input(&our_payment_basepoint.serialize());
506 let mut res = [0; 32];
507 sha.result(&mut res);
509 ((res[26] as u64) << 5*8) |
510 ((res[27] as u64) << 4*8) |
511 ((res[28] as u64) << 3*8) |
512 ((res[29] as u64) << 2*8) |
513 ((res[30] as u64) << 1*8) |
514 ((res[31] as u64) << 0*8)
517 /// Transaction nomenclature is somewhat confusing here as there are many different cases - a
518 /// transaction is referred to as "a's transaction" implying that a will be able to broadcast
519 /// the transaction. Thus, b will generally be sending a signature over such a transaction to
520 /// a, and a can revoke the transaction by providing b the relevant per_commitment_secret. As
521 /// such, a transaction is generally the result of b increasing the amount paid to a (or adding
523 /// @local is used only to convert relevant internal structures which refer to remote vs local
524 /// to decide value of outputs and direction of HTLCs.
525 /// @generated_by_local is used to determine *which* HTLCs to include - noting that the HTLC
526 /// state may indicate that one peer has informed the other that they'd like to add an HTLC but
527 /// have not yet committed it. Such HTLCs will only be included in transactions which are being
528 /// generated by the peer which proposed adding the HTLCs, and thus we need to understand both
529 /// which peer generated this transaction and "to whom" this transaction flows.
531 fn build_commitment_transaction(&self, commitment_number: u64, keys: &TxCreationKeys, local: bool, generated_by_local: bool) -> (Transaction, Vec<HTLCOutputInCommitment>) {
532 let obscured_commitment_transaction_number = self.get_commitment_transaction_number_obscure_factor() ^ commitment_number;
535 let mut ins: Vec<TxIn> = Vec::new();
537 prev_hash: self.channel_monitor.get_funding_txo().unwrap().0,
538 prev_index: self.channel_monitor.get_funding_txo().unwrap().1 as u32,
539 script_sig: Script::new(),
540 sequence: ((0x80 as u32) << 8*3) | ((obscured_commitment_transaction_number >> 3*8) as u32),
546 let mut txouts: Vec<(TxOut, Option<HTLCOutputInCommitment>)> = Vec::new();
548 let dust_limit_satoshis = if local { self.our_dust_limit_satoshis } else { self.their_dust_limit_satoshis };
549 let mut remote_htlc_total_msat = 0;
550 let mut local_htlc_total_msat = 0;
552 for ref htlc in self.pending_htlcs.iter() {
553 if htlc.state == HTLCState::Committed || htlc.state == (if generated_by_local { HTLCState::LocalAnnounced } else { HTLCState::RemoteAnnounced }) {
554 if htlc.outbound == local { // "offered HTLC output"
555 if htlc.amount_msat / 1000 >= dust_limit_satoshis + (self.feerate_per_kw * HTLC_TIMEOUT_TX_WEIGHT / 1000) {
556 let htlc_in_tx = htlc.get_in_commitment(true);
558 script_pubkey: chan_utils::get_htlc_redeemscript(&htlc_in_tx, &keys).to_v0_p2wsh(),
559 value: htlc.amount_msat / 1000
560 }, Some(htlc_in_tx)));
563 if htlc.amount_msat / 1000 >= dust_limit_satoshis + (self.feerate_per_kw * HTLC_SUCCESS_TX_WEIGHT / 1000) {
564 let htlc_in_tx = htlc.get_in_commitment(false);
565 txouts.push((TxOut { // "received HTLC output"
566 script_pubkey: chan_utils::get_htlc_redeemscript(&htlc_in_tx, &keys).to_v0_p2wsh(),
567 value: htlc.amount_msat / 1000
568 }, Some(htlc_in_tx)));
572 local_htlc_total_msat += htlc.amount_msat;
574 remote_htlc_total_msat += htlc.amount_msat;
579 let total_fee: u64 = self.feerate_per_kw * (COMMITMENT_TX_BASE_WEIGHT + (txouts.len() as u64) * COMMITMENT_TX_WEIGHT_PER_HTLC) / 1000;
580 let value_to_self: i64 = ((self.value_to_self_msat - local_htlc_total_msat) as i64) / 1000 - if self.channel_outbound { total_fee as i64 } else { 0 };
581 let value_to_remote: i64 = (((self.channel_value_satoshis * 1000 - self.value_to_self_msat - remote_htlc_total_msat) / 1000) as i64) - if self.channel_outbound { 0 } else { total_fee as i64 };
583 let value_to_a = if local { value_to_self } else { value_to_remote };
584 let value_to_b = if local { value_to_remote } else { value_to_self };
586 if value_to_a >= (dust_limit_satoshis as i64) {
588 script_pubkey: chan_utils::get_revokeable_redeemscript(&keys.revocation_key,
589 if local { self.their_to_self_delay } else { BREAKDOWN_TIMEOUT },
590 &keys.a_delayed_payment_key).to_v0_p2wsh(),
591 value: value_to_a as u64
595 if value_to_b >= (dust_limit_satoshis as i64) {
597 script_pubkey: Builder::new().push_opcode(opcodes::All::OP_PUSHBYTES_0)
598 .push_slice(&Hash160::from_data(&keys.b_payment_key.serialize())[..])
600 value: value_to_b as u64
604 transaction_utils::sort_outputs(&mut txouts);
606 let mut outputs: Vec<TxOut> = Vec::new();
607 let mut htlcs_used: Vec<HTLCOutputInCommitment> = Vec::new();
608 for (idx, out) in txouts.drain(..).enumerate() {
612 htlcs_used.push(out_htlc);
613 htlcs_used.last_mut().unwrap().transaction_output_index = idx as u32;
621 lock_time: ((0x20 as u32) << 8*3) | ((obscured_commitment_transaction_number & 0xffffffu64) as u32),
628 fn get_closing_scriptpubkey(&self) -> Script {
629 let our_channel_close_key_hash = Hash160::from_data(&PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.channel_close_key).unwrap().serialize());
630 Builder::new().push_opcode(opcodes::All::OP_PUSHBYTES_0).push_slice(&our_channel_close_key_hash[..]).into_script()
634 fn get_closing_transaction_weight(a_scriptpubkey: &Script, b_scriptpubkey: &Script) -> u64 {
635 (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)
639 fn build_closing_transaction(&self, proposed_total_fee_satoshis: u64, skip_remote_output: bool) -> (Transaction, u64) {
641 let mut ins: Vec<TxIn> = Vec::new();
643 prev_hash: self.channel_monitor.get_funding_txo().unwrap().0,
644 prev_index: self.channel_monitor.get_funding_txo().unwrap().1 as u32,
645 script_sig: Script::new(),
646 sequence: 0xffffffff,
652 assert!(self.pending_htlcs.is_empty());
653 let mut txouts: Vec<(TxOut, ())> = Vec::new();
655 let mut total_fee_satoshis = proposed_total_fee_satoshis;
656 let value_to_self: i64 = (self.value_to_self_msat as i64) / 1000 - if self.channel_outbound { total_fee_satoshis as i64 } else { 0 };
657 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 };
659 if value_to_self < 0 {
660 assert!(self.channel_outbound);
661 total_fee_satoshis += (-value_to_self) as u64;
662 } else if value_to_remote < 0 {
663 assert!(!self.channel_outbound);
664 total_fee_satoshis += (-value_to_remote) as u64;
667 if !skip_remote_output && value_to_remote as u64 > self.our_dust_limit_satoshis {
669 script_pubkey: self.their_shutdown_scriptpubkey.clone().unwrap(),
670 value: value_to_remote as u64
674 if value_to_self as u64 > self.our_dust_limit_satoshis {
676 script_pubkey: self.get_closing_scriptpubkey(),
677 value: value_to_self as u64
681 transaction_utils::sort_outputs(&mut txouts);
683 let mut outputs: Vec<TxOut> = Vec::new();
684 for out in txouts.drain(..) {
693 }, total_fee_satoshis)
697 /// Creates a set of keys for build_commitment_transaction to generate a transaction which our
698 /// counterparty will sign (ie DO NOT send signatures over a transaction created by this to
699 /// our counterparty!)
700 /// The result is a transaction which we can revoke ownership of (ie a "local" transaction)
701 /// TODO Some magic rust shit to compile-time check this?
702 fn build_local_transaction_keys(&self, commitment_number: u64) -> Result<TxCreationKeys, HandleError> {
703 let per_commitment_point = PublicKey::from_secret_key(&self.secp_ctx, &self.build_local_commitment_secret(commitment_number)).unwrap();
704 let delayed_payment_base = PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.delayed_payment_base_key).unwrap();
705 let htlc_basepoint = PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.htlc_base_key).unwrap();
707 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)))
711 /// Creates a set of keys for build_commitment_transaction to generate a transaction which we
712 /// will sign and send to our counterparty.
713 fn build_remote_transaction_keys(&self) -> Result<TxCreationKeys, HandleError> {
714 //TODO: Ensure that the payment_key derived here ends up in the library users' wallet as we
715 //may see payments to it!
716 let payment_basepoint = PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.payment_base_key).unwrap();
717 let revocation_basepoint = PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.revocation_base_key).unwrap();
718 let htlc_basepoint = PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.htlc_base_key).unwrap();
720 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)))
723 /// Gets the redeemscript for the funding transaction output (ie the funding transaction output
724 /// pays to get_funding_redeemscript().to_v0_p2wsh()).
725 pub fn get_funding_redeemscript(&self) -> Script {
726 let builder = Builder::new().push_opcode(opcodes::All::OP_PUSHNUM_2);
727 let our_funding_key = PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.funding_key).unwrap().serialize();
728 let their_funding_key = self.their_funding_pubkey.serialize();
729 if our_funding_key[..] < their_funding_key[..] {
730 builder.push_slice(&our_funding_key)
731 .push_slice(&their_funding_key)
733 builder.push_slice(&their_funding_key)
734 .push_slice(&our_funding_key)
735 }.push_opcode(opcodes::All::OP_PUSHNUM_2).push_opcode(opcodes::All::OP_CHECKMULTISIG).into_script()
738 fn sign_commitment_transaction(&self, tx: &mut Transaction, their_sig: &Signature) -> Signature {
739 if tx.input.len() != 1 {
740 panic!("Tried to sign commitment transaction that had input count != 1!");
742 if tx.input[0].witness.len() != 0 {
743 panic!("Tried to re-sign commitment transaction");
746 let funding_redeemscript = self.get_funding_redeemscript();
748 let sighash = Message::from_slice(&bip143::SighashComponents::new(&tx).sighash_all(&tx.input[0], &funding_redeemscript, self.channel_value_satoshis)[..]).unwrap();
749 let our_sig = self.secp_ctx.sign(&sighash, &self.local_keys.funding_key).unwrap();
751 tx.input[0].witness.push(Vec::new()); // First is the multisig dummy
753 let our_funding_key = PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.funding_key).unwrap().serialize();
754 let their_funding_key = self.their_funding_pubkey.serialize();
755 if our_funding_key[..] < their_funding_key[..] {
756 tx.input[0].witness.push(our_sig.serialize_der(&self.secp_ctx).to_vec());
757 tx.input[0].witness.push(their_sig.serialize_der(&self.secp_ctx).to_vec());
759 tx.input[0].witness.push(their_sig.serialize_der(&self.secp_ctx).to_vec());
760 tx.input[0].witness.push(our_sig.serialize_der(&self.secp_ctx).to_vec());
762 tx.input[0].witness[1].push(SigHashType::All as u8);
763 tx.input[0].witness[2].push(SigHashType::All as u8);
765 tx.input[0].witness.push(funding_redeemscript.into_vec());
770 /// Builds the htlc-success or htlc-timeout transaction which spends a given HTLC output
771 /// @local is used only to convert relevant internal structures which refer to remote vs local
772 /// to decide value of outputs and direction of HTLCs.
773 fn build_htlc_transaction(&self, prev_hash: &Sha256dHash, htlc: &HTLCOutputInCommitment, local: bool, keys: &TxCreationKeys) -> Result<Transaction, HandleError> {
774 let mut txins: Vec<TxIn> = Vec::new();
776 prev_hash: prev_hash.clone(),
777 prev_index: htlc.transaction_output_index,
778 script_sig: Script::new(),
783 let total_fee = if htlc.offered {
784 self.feerate_per_kw * HTLC_TIMEOUT_TX_WEIGHT / 1000
786 self.feerate_per_kw * HTLC_SUCCESS_TX_WEIGHT / 1000
789 let mut txouts: Vec<TxOut> = Vec::new();
791 script_pubkey: chan_utils::get_revokeable_redeemscript(&keys.revocation_key,
792 if local { self.their_to_self_delay } else { BREAKDOWN_TIMEOUT },
793 &keys.a_delayed_payment_key).to_v0_p2wsh(),
794 value: htlc.amount_msat / 1000 - total_fee //TODO: BOLT 3 does not specify if we should add amount_msat before dividing or if we should divide by 1000 before subtracting (as we do here)
799 lock_time: if htlc.offered { htlc.cltv_expiry } else { 0 },
805 /// Signs a transaction created by build_htlc_transaction. If the transaction is an
806 /// HTLC-Success transaction (ie htlc.offered is false), preimate must be set!
807 fn sign_htlc_transaction(&self, tx: &mut Transaction, their_sig: &Signature, preimage: &Option<[u8; 32]>, htlc: &HTLCOutputInCommitment, keys: &TxCreationKeys) -> Result<(), HandleError> {
808 if tx.input.len() != 1 {
809 panic!("Tried to sign HTLC transaction that had input count != 1!");
811 if tx.input[0].witness.len() != 0 {
812 panic!("Tried to re-sign HTLC transaction");
815 let htlc_redeemscript = chan_utils::get_htlc_redeemscript(&htlc, &keys);
817 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));
818 let sighash = Message::from_slice(&bip143::SighashComponents::new(&tx).sighash_all(&tx.input[0], &htlc_redeemscript, htlc.amount_msat / 1000)[..]).unwrap();
819 let our_sig = self.secp_ctx.sign(&sighash, &our_htlc_key).unwrap();
821 let local_tx = PublicKey::from_secret_key(&self.secp_ctx, &our_htlc_key).unwrap() == keys.a_htlc_key;
823 tx.input[0].witness.push(Vec::new()); // First is the multisig dummy
825 if local_tx { // b, then a
826 tx.input[0].witness.push(their_sig.serialize_der(&self.secp_ctx).to_vec());
827 tx.input[0].witness.push(our_sig.serialize_der(&self.secp_ctx).to_vec());
829 tx.input[0].witness.push(our_sig.serialize_der(&self.secp_ctx).to_vec());
830 tx.input[0].witness.push(their_sig.serialize_der(&self.secp_ctx).to_vec());
832 tx.input[0].witness[1].push(SigHashType::All as u8);
833 tx.input[0].witness[2].push(SigHashType::All as u8);
836 tx.input[0].witness.push(Vec::new());
838 tx.input[0].witness.push(preimage.unwrap().to_vec());
841 tx.input[0].witness.push(htlc_redeemscript.into_vec());
846 pub fn get_update_fulfill_htlc(&mut self, payment_preimage: [u8; 32]) -> Result<msgs::UpdateFulfillHTLC, HandleError> {
847 // Either ChannelFunded got set (which means it wont bet unset) or there is no way any
848 // caller thought we could have something claimed (cause we wouldn't have accepted in an
849 // incoming HTLC anyway). If we got to ShutdownComplete, callers aren't allowed to call us,
851 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
852 panic!("Was asked to fulfill an HTLC when channel was not in an operational state");
854 assert_eq!(self.channel_state & ChannelState::ShutdownComplete as u32, 0);
856 let mut sha = Sha256::new();
857 sha.input(&payment_preimage);
858 let mut payment_hash = [0; 32];
859 sha.result(&mut payment_hash);
862 let mut htlc_amount_msat = 0;
863 //TODO: swap_remove since we dont need to maintain ordering here
864 self.pending_htlcs.retain(|ref htlc| {
865 if !htlc.outbound && htlc.payment_hash == payment_hash {
867 panic!("Duplicate HTLC payment_hash, you probably re-used payment preimages, NEVER DO THIS!");
869 htlc_id = htlc.htlc_id;
870 htlc_amount_msat += htlc.amount_msat;
874 if htlc_amount_msat == 0 {
875 return Err(HandleError{err: "Unable to find a pending HTLC which matched the given payment preimage", msg: None});
878 //TODO: This is racy af, they may have pending messages in flight to us that will not have
880 self.value_to_self_msat += htlc_amount_msat;
881 Ok(msgs::UpdateFulfillHTLC {
882 channel_id: self.channel_id(),
884 payment_preimage: payment_preimage,
888 pub fn get_update_fail_htlc(&mut self, payment_hash: &[u8; 32], err_packet: msgs::OnionErrorPacket) -> Result<msgs::UpdateFailHTLC, HandleError> {
889 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
890 return Err(HandleError{err: "Was asked to fail an HTLC when channel was not in an operational state", msg: None});
892 assert_eq!(self.channel_state & ChannelState::ShutdownComplete as u32, 0);
895 let mut htlc_amount_msat = 0;
896 //TODO: swap_remove since we dont need to maintain ordering here
897 self.pending_htlcs.retain(|ref htlc| {
898 if !htlc.outbound && htlc.payment_hash == *payment_hash {
900 panic!("Duplicate HTLC payment_hash, you probably re-used payment preimages, NEVER DO THIS!");
902 htlc_id = htlc.htlc_id;
903 htlc_amount_msat += htlc.amount_msat;
907 if htlc_amount_msat == 0 {
908 return Err(HandleError{err: "Unable to find a pending HTLC which matched the given payment preimage", msg: None});
911 //TODO: This is racy af, they may have pending messages in flight to us that will not have
914 Ok(msgs::UpdateFailHTLC {
915 channel_id: self.channel_id(),
923 pub fn accept_channel(&mut self, msg: &msgs::AcceptChannel) -> Result<(), HandleError> {
924 // Check sanity of message fields:
925 if !self.channel_outbound {
926 return Err(HandleError{err: "Got an accept_channel message from an inbound peer", msg: None});
928 if self.channel_state != ChannelState::OurInitSent as u32 {
929 return Err(HandleError{err: "Got an accept_channel message at a strange time", msg: None});
931 if msg.dust_limit_satoshis > 21000000 * 100000000 {
932 return Err(HandleError{err: "Peer never wants payout outputs?", msg: None});
934 if msg.max_htlc_value_in_flight_msat > self.channel_value_satoshis * 1000 {
935 return Err(HandleError{err: "Bogus max_htlc_value_in_flight_satoshis", msg: None});
937 if msg.channel_reserve_satoshis > self.channel_value_satoshis {
938 return Err(HandleError{err: "Bogus channel_reserve_satoshis", msg: None});
940 if msg.htlc_minimum_msat >= (self.channel_value_satoshis - msg.channel_reserve_satoshis) * 1000 {
941 return Err(HandleError{err: "Minimum htlc value is full channel value", msg: None});
943 //TODO do something with minimum_depth
944 if msg.to_self_delay > MAX_LOCAL_BREAKDOWN_TIMEOUT {
945 return Err(HandleError{err: "They wanted our payments to be delayed by a needlessly long period", msg: None});
947 if msg.max_accepted_htlcs < 1 {
948 return Err(HandleError{err: "0 max_accpted_htlcs makes for a useless channel", msg: None});
951 self.channel_monitor.set_their_htlc_base_key(&msg.htlc_basepoint);
953 self.their_dust_limit_satoshis = msg.dust_limit_satoshis;
954 self.their_max_htlc_value_in_flight_msat = msg.max_htlc_value_in_flight_msat;
955 self.their_channel_reserve_satoshis = msg.channel_reserve_satoshis;
956 self.their_htlc_minimum_msat = msg.htlc_minimum_msat;
957 self.their_to_self_delay = msg.to_self_delay;
958 self.their_max_accepted_htlcs = msg.max_accepted_htlcs;
959 self.their_funding_pubkey = msg.funding_pubkey;
960 self.their_revocation_basepoint = msg.revocation_basepoint;
961 self.their_payment_basepoint = msg.payment_basepoint;
962 self.their_delayed_payment_basepoint = msg.delayed_payment_basepoint;
963 self.their_htlc_basepoint = msg.htlc_basepoint;
964 self.their_cur_commitment_point = msg.first_per_commitment_point;
966 let obscure_factor = self.get_commitment_transaction_number_obscure_factor();
967 self.channel_monitor.set_commitment_obscure_factor(obscure_factor);
969 self.channel_state = ChannelState::OurInitSent as u32 | ChannelState::TheirInitSent as u32;
974 fn funding_created_signature(&mut self, sig: &Signature) -> Result<(Transaction, Signature), HandleError> {
975 let funding_script = self.get_funding_redeemscript();
977 let remote_keys = self.build_remote_transaction_keys()?;
978 let remote_initial_commitment_tx = self.build_commitment_transaction(self.cur_remote_commitment_transaction_number, &remote_keys, false, false).0;
979 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();
981 let local_keys = self.build_local_transaction_keys(self.cur_local_commitment_transaction_number)?;
982 let local_initial_commitment_tx = self.build_commitment_transaction(self.cur_local_commitment_transaction_number, &local_keys, true, false).0;
983 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();
985 // They sign the "local" commitment transaction, allowing us to broadcast the tx if we wish.
986 secp_call!(self.secp_ctx.verify(&local_sighash, &sig, &self.their_funding_pubkey), "Invalid funding_created signature from peer");
988 // We sign the "remote" commitment transaction, allowing them to broadcast the tx if they wish.
989 Ok((remote_initial_commitment_tx, self.secp_ctx.sign(&remote_sighash, &self.local_keys.funding_key).unwrap()))
992 pub fn funding_created(&mut self, msg: &msgs::FundingCreated) -> Result<msgs::FundingSigned, HandleError> {
993 if self.channel_outbound {
994 return Err(HandleError{err: "Received funding_created for an outbound channel?", msg: None});
996 if self.channel_state != (ChannelState::OurInitSent as u32 | ChannelState::TheirInitSent as u32) {
997 return Err(HandleError{err: "Received funding_created after we got the channel!", msg: None});
999 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 {
1000 panic!("Should not have advanced channel commitment tx numbers prior to funding_created");
1003 self.channel_monitor.set_funding_info(msg.funding_txid, msg.funding_output_index);
1005 let (remote_initial_commitment_tx, our_signature) = match self.funding_created_signature(&msg.signature) {
1006 Ok((remote_initial_commitment_tx, sig)) => (remote_initial_commitment_tx, sig),
1008 self.channel_monitor.unset_funding_info();
1013 // Now that we're past error-generating stuff, update our local state:
1015 //TODO: Determine which tx index in remote_initial_commitment_transaction's outputs
1016 //represent a revokeable script!
1017 self.channel_monitor.provide_tx_info(&remote_initial_commitment_tx, 0, Vec::new());
1018 self.channel_state = ChannelState::FundingSent as u32;
1019 let funding_txo = self.channel_monitor.get_funding_txo().unwrap();
1020 self.channel_id = funding_txo.0.into_be() ^ Uint256::from_u64(funding_txo.1 as u64).unwrap(); //TODO: or le?
1022 Ok(msgs::FundingSigned {
1023 channel_id: self.channel_id,
1024 signature: our_signature
1028 /// Handles a funding_signed message from the remote end.
1029 /// If this call is successful, broadcast the funding transaction (and not before!)
1030 pub fn funding_signed(&mut self, msg: &msgs::FundingSigned) -> Result<(), HandleError> {
1031 if !self.channel_outbound {
1032 return Err(HandleError{err: "Received funding_signed for an inbound channel?", msg: None});
1034 if self.channel_state != ChannelState::FundingCreated as u32 {
1035 return Err(HandleError{err: "Received funding_signed in strange state!", msg: None});
1037 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 {
1038 panic!("Should not have advanced channel commitment tx numbers prior to funding_created");
1041 let funding_script = self.get_funding_redeemscript();
1043 let local_keys = self.build_local_transaction_keys(self.cur_local_commitment_transaction_number)?;
1044 let local_initial_commitment_tx = self.build_commitment_transaction(self.cur_local_commitment_transaction_number, &local_keys, true, false).0;
1045 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();
1047 // They sign the "local" commitment transaction, allowing us to broadcast the tx if we wish.
1048 secp_call!(self.secp_ctx.verify(&local_sighash, &msg.signature, &self.their_funding_pubkey), "Invalid funding_signed signature from peer");
1050 self.channel_state = ChannelState::FundingSent as u32;
1055 pub fn funding_locked(&mut self, msg: &msgs::FundingLocked) -> Result<(), HandleError> {
1056 let non_shutdown_state = self.channel_state & (!BOTH_SIDES_SHUTDOWN_MASK);
1057 if non_shutdown_state == ChannelState::FundingSent as u32 {
1058 self.channel_state |= ChannelState::TheirFundingLocked as u32;
1059 } else if non_shutdown_state == (ChannelState::FundingSent as u32 | ChannelState::OurFundingLocked as u32) {
1060 self.channel_state = ChannelState::ChannelFunded as u32 | (self.channel_state & BOTH_SIDES_SHUTDOWN_MASK);
1062 return Err(HandleError{err: "Peer sent a funding_locked at a strange time", msg: None});
1065 //TODO: Note that this must be a duplicate of the previous commitment point they sent us,
1066 //as otherwise we will have a commitment transaction that they can't revoke (well, kinda,
1067 //they can by sending two revoke_and_acks back-to-back, but not really). This appears to be
1068 //a protocol oversight, but I assume I'm just missing something.
1069 if self.their_cur_commitment_point != msg.next_per_commitment_point {
1070 return Err(HandleError{err: "Non-duplicate next_per_commitment_point in funding_locked", msg: None});
1072 self.their_cur_commitment_point = msg.next_per_commitment_point;
1076 /// Returns (inbound_htlc_count, outbound_htlc_count, htlc_outbound_value_msat, htlc_inbound_value_msat)
1077 fn get_pending_htlc_stats(&self) -> (u32, u32, u64, u64) {
1078 let mut inbound_htlc_count: u32 = 0;
1079 let mut outbound_htlc_count: u32 = 0;
1080 let mut htlc_outbound_value_msat = 0;
1081 let mut htlc_inbound_value_msat = 0;
1082 for ref htlc in self.pending_htlcs.iter() {
1084 inbound_htlc_count += 1;
1085 htlc_inbound_value_msat += htlc.amount_msat;
1087 outbound_htlc_count += 1;
1088 htlc_outbound_value_msat += htlc.amount_msat;
1091 (inbound_htlc_count, outbound_htlc_count, htlc_outbound_value_msat, htlc_inbound_value_msat)
1094 pub fn update_add_htlc(&mut self, msg: &msgs::UpdateAddHTLC, pending_forward_state: PendingForwardHTLCInfo) -> Result<(), HandleError> {
1095 if (self.channel_state & (ChannelState::ChannelFunded as u32 | ChannelState::RemoteShutdownSent as u32)) != (ChannelState::ChannelFunded as u32) {
1096 return Err(HandleError{err: "Got add HTLC message when channel was not in an operational state", msg: None});
1098 if msg.amount_msat > self.channel_value_satoshis * 1000 {
1099 return Err(HandleError{err: "Remote side tried to send more than the total value of the channel", msg: None});
1101 if msg.amount_msat < self.our_htlc_minimum_msat {
1102 return Err(HandleError{err: "Remote side tried to send less than our minimum HTLC value", msg: None});
1105 let (inbound_htlc_count, _, htlc_outbound_value_msat, htlc_inbound_value_msat) = self.get_pending_htlc_stats();
1106 if inbound_htlc_count + 1 > OUR_MAX_HTLCS as u32 {
1107 return Err(HandleError{err: "Remote tried to push more than our max accepted HTLCs", msg: None});
1109 //TODO: Spec is unclear if this is per-direction or in total (I assume per direction):
1110 // Check our_max_htlc_value_in_flight_msat
1111 if htlc_inbound_value_msat + msg.amount_msat > Channel::get_our_max_htlc_value_in_flight_msat(self.channel_value_satoshis) {
1112 return Err(HandleError{err: "Remote HTLC add would put them over their max HTLC value in flight", msg: None});
1114 // Check our_channel_reserve_satoshis (we're getting paid, so they have to at least meet
1115 // the reserve_satoshis we told them to always have as direct payment so that they lose
1116 // something if we punish them for broadcasting an old state).
1117 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 {
1118 return Err(HandleError{err: "Remote HTLC add would put them over their reserve value", msg: None});
1120 if self.next_remote_htlc_id != msg.htlc_id {
1121 return Err(HandleError{err: "Remote skipped HTLC ID", msg: None});
1123 if msg.cltv_expiry >= 500000000 {
1124 return Err(HandleError{err: "Remote provided CLTV expiry in seconds instead of block height", msg: None});
1127 //TODO: Check msg.cltv_expiry further? Do this in channel manager?
1129 // Now update local state:
1130 self.next_remote_htlc_id += 1;
1131 self.pending_htlcs.push(HTLCOutput {
1133 htlc_id: msg.htlc_id,
1134 amount_msat: msg.amount_msat,
1135 payment_hash: msg.payment_hash,
1136 cltv_expiry: msg.cltv_expiry,
1137 state: HTLCState::RemoteAnnounced,
1138 pending_forward_state: Some(pending_forward_state),
1144 /// Removes an outbound HTLC which has been commitment_signed by the remote end
1145 fn remove_outbound_htlc(&mut self, htlc_id: u64, check_preimage: Option<[u8; 32]>) -> Result<HTLCOutput, HandleError> {
1146 let mut found_idx = None;
1147 for (idx, ref htlc) in self.pending_htlcs.iter().enumerate() {
1148 if htlc.outbound && htlc.htlc_id == htlc_id {
1149 match check_preimage {
1151 Some(payment_hash) =>
1152 if payment_hash != htlc.payment_hash {
1153 return Err(HandleError{err: "Remote tried to fulfill HTLC with an incorrect preimage", msg: None});
1156 found_idx = Some(idx);
1161 None => Err(HandleError{err: "Remote tried to fulfill/fail an HTLC we couldn't find", msg: None}),
1163 Ok(self.pending_htlcs.swap_remove(idx))
1168 /// Used to fulfill holding_cell_htlcs when we get a remote ack (or implicitly get it by them
1169 /// fulfilling or failing the last pending HTLC)
1170 fn free_holding_cell_htlcs(&mut self) -> Result<Option<(Vec<msgs::UpdateAddHTLC>, msgs::CommitmentSigned)>, HandleError> {
1171 if self.holding_cell_htlcs.len() != 0 {
1172 let mut new_htlcs = self.holding_cell_htlcs.split_off(0);
1173 let mut update_add_msgs = Vec::with_capacity(new_htlcs.len());
1175 for new_htlc in new_htlcs.drain(..) {
1176 // Note that this *can* fail, though it should be due to rather-rare conditions on
1177 // fee races with adding too many outputs which push our total payments just over
1178 // the limit. In case its less rare than I anticipate, we may want to revisit
1179 // handling this case better and maybe fufilling some of the HTLCs while attempting
1180 // to rebalance channels.
1181 if self.holding_cell_htlcs.len() != 0 {
1182 self.holding_cell_htlcs.push(new_htlc);
1184 match self.send_htlc(new_htlc.amount_msat, new_htlc.payment_hash, new_htlc.cltv_expiry, new_htlc.onion_routing_packet.clone()) {
1185 Ok(update_add_msg_option) => update_add_msgs.push(update_add_msg_option.unwrap()),
1187 self.holding_cell_htlcs.push(new_htlc);
1193 //TODO: Need to examine the type of err - if its a fee issue or similar we may want to
1194 //fail it back the route, if its a temporary issue we can ignore it...
1195 if update_add_msgs.len() > 0 {
1196 Ok(Some((update_add_msgs, self.send_commitment()?)))
1205 pub fn update_fulfill_htlc(&mut self, msg: &msgs::UpdateFulfillHTLC) -> Result<(), HandleError> {
1206 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
1207 return Err(HandleError{err: "Got add HTLC message when channel was not in an operational state", msg: None});
1210 let mut sha = Sha256::new();
1211 sha.input(&msg.payment_preimage);
1212 let mut payment_hash = [0; 32];
1213 sha.result(&mut payment_hash);
1215 match self.remove_outbound_htlc(msg.htlc_id, Some(payment_hash)) {
1216 Err(e) => return Err(e),
1218 //TODO: Double-check that we didn't exceed some limits (or value_to_self went
1220 self.value_to_self_msat -= htlc.amount_msat;
1226 pub fn update_fail_htlc(&mut self, msg: &msgs::UpdateFailHTLC) -> Result<[u8; 32], HandleError> {
1227 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
1228 return Err(HandleError{err: "Got add HTLC message when channel was not in an operational state", msg: None});
1231 let payment_hash = match self.remove_outbound_htlc(msg.htlc_id, None) {
1232 Err(e) => return Err(e),
1234 //TODO: Double-check that we didn't exceed some limits (or value_to_self went
1242 pub fn update_fail_malformed_htlc(&mut self, msg: &msgs::UpdateFailMalformedHTLC) -> Result<[u8; 32], HandleError> {
1243 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
1244 return Err(HandleError{err: "Got add HTLC message when channel was not in an operational state", msg: None});
1247 let payment_hash = match self.remove_outbound_htlc(msg.htlc_id, None) {
1248 Err(e) => return Err(e),
1250 //TODO: Double-check that we didn't exceed some limits (or value_to_self went
1258 pub fn commitment_signed(&mut self, msg: &msgs::CommitmentSigned) -> Result<(msgs::RevokeAndACK, Vec<PendingForwardHTLCInfo>), HandleError> {
1259 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
1260 return Err(HandleError{err: "Got commitment signed message when channel was not in an operational state", msg: None});
1263 let funding_script = self.get_funding_redeemscript();
1265 let local_keys = self.build_local_transaction_keys(self.cur_local_commitment_transaction_number)?;
1266 let local_commitment_tx = self.build_commitment_transaction(self.cur_local_commitment_transaction_number, &local_keys, true, false);
1267 let local_commitment_txid = local_commitment_tx.0.txid();
1268 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();
1269 secp_call!(self.secp_ctx.verify(&local_sighash, &msg.signature, &self.their_funding_pubkey), "Invalid commitment tx signature from peer");
1271 if msg.htlc_signatures.len() != local_commitment_tx.1.len() {
1272 return Err(HandleError{err: "Got wrong number of HTLC signatures from remote", msg: None});
1275 for (idx, ref htlc) in local_commitment_tx.1.iter().enumerate() {
1276 let htlc_tx = self.build_htlc_transaction(&local_commitment_txid, htlc, true, &local_keys)?;
1277 let htlc_redeemscript = chan_utils::get_htlc_redeemscript(&htlc, &local_keys);
1278 let htlc_sighash = Message::from_slice(&bip143::SighashComponents::new(&htlc_tx).sighash_all(&htlc_tx.input[0], &htlc_redeemscript, htlc.amount_msat / 1000)[..]).unwrap();
1279 secp_call!(self.secp_ctx.verify(&htlc_sighash, &msg.htlc_signatures[idx], &local_keys.b_htlc_key), "Invalid HTLC tx siganture from peer");
1282 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();
1283 let per_commitment_secret = chan_utils::build_commitment_secret(self.local_keys.commitment_seed, self.cur_local_commitment_transaction_number);
1285 //TODO: Store htlc keys in our channel_watcher
1287 // Update state now that we've passed all the can-fail calls...
1289 let mut to_forward_infos = Vec::new();
1290 for ref mut htlc in self.pending_htlcs.iter_mut() {
1291 if htlc.state == HTLCState::RemoteAnnounced {
1292 htlc.state = HTLCState::Committed;
1293 to_forward_infos.push(htlc.pending_forward_state.take().unwrap());
1297 self.cur_local_commitment_transaction_number -= 1;
1299 Ok((msgs::RevokeAndACK {
1300 channel_id: self.channel_id,
1301 per_commitment_secret: per_commitment_secret,
1302 next_per_commitment_point: next_per_commitment_point,
1303 }, to_forward_infos))
1306 /// Handles receiving a remote's revoke_and_ack. Note that we may return a new
1307 /// commitment_signed message here in case we had pending outbound HTLCs to add which were
1308 /// waiting on this revoke_and_ack. The generation of this new commitment_signed may also fail,
1309 /// generating an appropriate error *after* the channel state has been updated based on the
1310 /// revoke_and_ack message.
1311 pub fn revoke_and_ack(&mut self, msg: &msgs::RevokeAndACK) -> Result<Option<(Vec<msgs::UpdateAddHTLC>, msgs::CommitmentSigned)>, HandleError> {
1312 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
1313 return Err(HandleError{err: "Got revoke/ACK message when channel was not in an operational state", msg: None});
1315 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() != self.their_cur_commitment_point {
1316 return Err(HandleError{err: "Got a revoke commitment secret which didn't correspond to their current pubkey", msg: None});
1318 self.channel_monitor.provide_secret(self.cur_remote_commitment_transaction_number, msg.per_commitment_secret)?;
1320 // Update state now that we've passed all the can-fail calls...
1321 // (note that we may still fail to generate the new commitment_signed message, but that's
1322 // OK, we step the channel here and *then* if the new generation fails we can fail the
1323 // channel based on that, but stepping stuff here should be safe either way.
1324 self.channel_state &= !(ChannelState::AwaitingRemoteRevoke as u32);
1325 self.their_cur_commitment_point = msg.next_per_commitment_point;
1326 self.cur_remote_commitment_transaction_number -= 1;
1327 for htlc in self.pending_htlcs.iter_mut() {
1328 if htlc.state == HTLCState::LocalAnnounced {
1329 htlc.state = HTLCState::Committed;
1333 self.free_holding_cell_htlcs()
1336 pub fn update_fee(&mut self, fee_estimator: &FeeEstimator, msg: &msgs::UpdateFee) -> Result<(), HandleError> {
1337 if self.channel_outbound {
1338 return Err(HandleError{err: "Non-funding remote tried to update channel fee", msg: None});
1340 Channel::check_remote_fee(fee_estimator, msg.feerate_per_kw)?;
1341 self.feerate_per_kw = msg.feerate_per_kw as u64;
1345 pub fn shutdown(&mut self, fee_estimator: &FeeEstimator, msg: &msgs::Shutdown) -> Result<(Option<msgs::Shutdown>, Option<msgs::ClosingSigned>, Vec<[u8; 32]>), HandleError> {
1346 if self.channel_state < ChannelState::FundingSent as u32 {
1347 self.channel_state = ChannelState::ShutdownComplete as u32;
1348 return Ok((None, None, Vec::new()));
1350 for htlc in self.pending_htlcs.iter() {
1351 if htlc.state == HTLCState::RemoteAnnounced {
1352 return Err(HandleError{err: "Got shutdown with remote pending HTLCs", msg: None});
1355 if (self.channel_state & ChannelState::RemoteShutdownSent as u32) == ChannelState::RemoteShutdownSent as u32 {
1356 return Err(HandleError{err: "Remote peer sent duplicate shutdown message", msg: None});
1358 assert_eq!(self.channel_state & ChannelState::ShutdownComplete as u32, 0);
1360 // BOLT 2 says we must only send a scriptpubkey of certain standard forms, which are up to
1361 // 34 bytes in length, so dont let the remote peer feed us some super fee-heavy script.
1362 if self.channel_outbound && msg.scriptpubkey.len() > 34 {
1363 return Err(HandleError{err: "Got shutdown_scriptpubkey of absurd length from remote peer", msg: None});
1365 //TODO: Check shutdown_scriptpubkey form as BOLT says we must? WHYYY
1367 if self.their_shutdown_scriptpubkey.is_some() {
1368 if Some(&msg.scriptpubkey) != self.their_shutdown_scriptpubkey.as_ref() {
1369 return Err(HandleError{err: "Got shutdown request with a scriptpubkey which did not match their previous scriptpubkey", msg: None});
1372 self.their_shutdown_scriptpubkey = Some(msg.scriptpubkey.clone());
1375 let our_closing_script = self.get_closing_scriptpubkey();
1377 let (proposed_feerate, proposed_fee, our_sig) = if self.channel_outbound && self.pending_htlcs.is_empty() {
1378 let mut proposed_feerate = fee_estimator.get_est_sat_per_vbyte(ConfirmationTarget::Background);
1379 if self.feerate_per_kw > proposed_feerate * 250 {
1380 proposed_feerate = self.feerate_per_kw / 250;
1382 let tx_weight = Self::get_closing_transaction_weight(&our_closing_script, &msg.scriptpubkey);
1383 let proposed_total_fee_satoshis = proposed_feerate * tx_weight / 4;
1385 let (closing_tx, total_fee_satoshis) = self.build_closing_transaction(proposed_total_fee_satoshis, false);
1386 let funding_redeemscript = self.get_funding_redeemscript();
1387 let sighash = Message::from_slice(&bip143::SighashComponents::new(&closing_tx).sighash_all(&closing_tx.input[0], &funding_redeemscript, self.channel_value_satoshis)[..]).unwrap();
1389 (Some(proposed_feerate), Some(total_fee_satoshis), Some(self.secp_ctx.sign(&sighash, &self.local_keys.funding_key).unwrap()))
1390 } else { (None, None, None) };
1392 // From here on out, we may not fail!
1394 self.channel_state |= ChannelState::RemoteShutdownSent as u32;
1396 // We can't send our shutdown until we've committed all of our pending HTLCs, but the
1397 // remote side is unlikely to accept any new HTLCs, so we go ahead and "free" any holding
1398 // cell HTLCs and return them to fail the payment.
1399 let mut dropped_outbound_htlcs = Vec::with_capacity(self.holding_cell_htlcs.len());
1400 for htlc in self.holding_cell_htlcs.drain(..) {
1401 dropped_outbound_htlcs.push(htlc.payment_hash);
1403 for htlc in self.pending_htlcs.iter() {
1404 if htlc.state == HTLCState::LocalAnnounced {
1405 return Ok((None, None, dropped_outbound_htlcs));
1409 let our_shutdown = if (self.channel_state & ChannelState::LocalShutdownSent as u32) == ChannelState::LocalShutdownSent as u32 {
1412 Some(msgs::Shutdown {
1413 channel_id: self.channel_id,
1414 scriptpubkey: our_closing_script,
1418 self.channel_state |= ChannelState::LocalShutdownSent as u32;
1419 if self.pending_htlcs.is_empty() && self.channel_outbound {
1420 // There are no more HTLCs and we're the funder, this means we start the closing_signed
1421 // dance with an initial fee proposal!
1422 self.last_sent_closing_fee = Some((proposed_feerate.unwrap(), proposed_fee.unwrap()));
1423 Ok((our_shutdown, Some(msgs::ClosingSigned {
1424 channel_id: self.channel_id,
1425 fee_satoshis: proposed_fee.unwrap(),
1426 signature: our_sig.unwrap(),
1427 }), dropped_outbound_htlcs))
1429 Ok((our_shutdown, None, dropped_outbound_htlcs))
1433 pub fn closing_signed(&mut self, fee_estimator: &FeeEstimator, msg: &msgs::ClosingSigned) -> Result<(Option<msgs::ClosingSigned>, Option<Transaction>), HandleError> {
1434 if self.channel_state & BOTH_SIDES_SHUTDOWN_MASK != BOTH_SIDES_SHUTDOWN_MASK {
1435 return Err(HandleError{err: "Remote end sent us a closing_signed before both sides provided a shutdown", msg: None});
1437 if !self.pending_htlcs.is_empty() {
1438 return Err(HandleError{err: "Remote end sent us a closing_signed while there were still pending HTLCs", msg: None});
1440 if msg.fee_satoshis > 21000000 * 10000000 {
1441 return Err(HandleError{err: "Remote tried to send us a closing tx with > 21 million BTC fee", msg: None});
1444 let funding_redeemscript = self.get_funding_redeemscript();
1445 let (mut closing_tx, used_total_fee) = self.build_closing_transaction(msg.fee_satoshis, false);
1446 if used_total_fee != msg.fee_satoshis {
1447 return Err(HandleError{err: "Remote sent us a closing_signed with a fee greater than the value they can claim", msg: None});
1449 let mut sighash = Message::from_slice(&bip143::SighashComponents::new(&closing_tx).sighash_all(&closing_tx.input[0], &funding_redeemscript, self.channel_value_satoshis)[..]).unwrap();
1451 match self.secp_ctx.verify(&sighash, &msg.signature, &self.their_funding_pubkey) {
1454 // The remote end may have decided to revoke their output due to inconsistent dust
1455 // limits, so check for that case by re-checking the signature here.
1456 closing_tx = self.build_closing_transaction(msg.fee_satoshis, true).0;
1457 sighash = Message::from_slice(&bip143::SighashComponents::new(&closing_tx).sighash_all(&closing_tx.input[0], &funding_redeemscript, self.channel_value_satoshis)[..]).unwrap();
1458 secp_call!(self.secp_ctx.verify(&sighash, &msg.signature, &self.their_funding_pubkey), "Invalid closing tx signature from peer");
1462 if let Some((_, last_fee)) = self.last_sent_closing_fee {
1463 if last_fee == msg.fee_satoshis {
1464 self.sign_commitment_transaction(&mut closing_tx, &msg.signature);
1465 self.channel_state = ChannelState::ShutdownComplete as u32;
1466 return Ok((None, Some(closing_tx)));
1470 macro_rules! propose_new_feerate {
1471 ($new_feerate: expr) => {
1472 let closing_tx_max_weight = Self::get_closing_transaction_weight(&self.get_closing_scriptpubkey(), self.their_shutdown_scriptpubkey.as_ref().unwrap());
1473 let (closing_tx, used_total_fee) = self.build_closing_transaction($new_feerate * closing_tx_max_weight / 4, false);
1474 sighash = Message::from_slice(&bip143::SighashComponents::new(&closing_tx).sighash_all(&closing_tx.input[0], &funding_redeemscript, self.channel_value_satoshis)[..]).unwrap();
1475 let our_sig = self.secp_ctx.sign(&sighash, &self.local_keys.funding_key).unwrap();
1476 self.last_sent_closing_fee = Some(($new_feerate, used_total_fee));
1477 return Ok((Some(msgs::ClosingSigned {
1478 channel_id: self.channel_id,
1479 fee_satoshis: used_total_fee,
1485 let proposed_sat_per_vbyte = msg.fee_satoshis * 4 / closing_tx.get_weight();
1486 if self.channel_outbound {
1487 let our_max_feerate = fee_estimator.get_est_sat_per_vbyte(ConfirmationTarget::Normal);
1488 if proposed_sat_per_vbyte > our_max_feerate {
1489 if let Some((last_feerate, _)) = self.last_sent_closing_fee {
1490 if our_max_feerate <= last_feerate {
1491 return Err(HandleError{err: "Unable to come to consensus about closing feerate, remote wanted something higher than our Normal feerate", msg: None});
1494 propose_new_feerate!(our_max_feerate);
1497 let our_min_feerate = fee_estimator.get_est_sat_per_vbyte(ConfirmationTarget::Background);
1498 if proposed_sat_per_vbyte < our_min_feerate {
1499 if let Some((last_feerate, _)) = self.last_sent_closing_fee {
1500 if our_min_feerate >= last_feerate {
1501 return Err(HandleError{err: "Unable to come to consensus about closing feerate, remote wanted something lower than our Background feerate", msg: None});
1504 propose_new_feerate!(our_min_feerate);
1508 let our_sig = self.sign_commitment_transaction(&mut closing_tx, &msg.signature);
1509 self.channel_state = ChannelState::ShutdownComplete as u32;
1511 Ok((Some(msgs::ClosingSigned {
1512 channel_id: self.channel_id,
1513 fee_satoshis: msg.fee_satoshis,
1515 }), Some(closing_tx)))
1518 // Public utilities:
1520 pub fn channel_id(&self) -> Uint256 {
1524 /// Gets the "user_id" value passed into the construction of this channel. It has no special
1525 /// meaning and exists only to allow users to have a persistent identifier of a channel.
1526 pub fn get_user_id(&self) -> u64 {
1530 /// Guaranteed to be Some after both FundingLocked messages have been exchanged (and, thus,
1531 /// is_usable() returns true).
1532 pub fn get_short_channel_id(&self) -> Option<u64> {
1533 self.short_channel_id
1536 /// Returns the funding_txo we either got from our peer, or were given by
1537 /// get_outbound_funding_created.
1538 pub fn get_funding_txo(&self) -> Option<(Sha256dHash, u16)> {
1539 self.channel_monitor.get_funding_txo()
1542 pub fn get_their_node_id(&self) -> PublicKey {
1546 pub fn get_our_htlc_minimum_msat(&self) -> u64 {
1547 self.our_htlc_minimum_msat
1550 pub fn get_value_satoshis(&self) -> u64 {
1551 self.channel_value_satoshis
1554 pub fn get_channel_update_count(&mut self) -> u32 {
1555 self.channel_update_count += 1; //TODO: This should be base on updates, not updates *sent*
1556 self.channel_update_count
1559 /// Gets the fee we'd want to charge for adding an HTLC output to this Channel
1560 pub fn get_our_fee_base_msat(&self, fee_estimator: &FeeEstimator) -> u32 {
1561 // For lack of a better metric, we calculate what it would cost to consolidate the new HTLC
1562 // output value back into a transaction with the regular channel output:
1564 // the fee cost of the HTLC-Success/HTLC-Timeout transaction:
1565 let mut res = self.feerate_per_kw * cmp::max(HTLC_TIMEOUT_TX_WEIGHT, HTLC_SUCCESS_TX_WEIGHT);
1567 if self.channel_outbound {
1568 // + the marginal fee increase cost to us in the commitment transaction:
1569 res += self.feerate_per_kw * COMMITMENT_TX_WEIGHT_PER_HTLC;
1572 // + the marginal cost of an input which spends the HTLC-Success/HTLC-Timeout output:
1573 res += fee_estimator.get_est_sat_per_vbyte(ConfirmationTarget::Normal) * SPENDING_INPUT_FOR_A_OUTPUT_WEIGHT * 250;
1578 pub fn channel_monitor(&self) -> ChannelMonitor {
1579 if self.channel_state < ChannelState::FundingCreated as u32 {
1580 panic!("Can't get a channel monitor until funding has been created");
1582 self.channel_monitor.clone()
1585 /// Returns true if this channel is fully established and not known to be closing.
1586 pub fn is_usable(&self) -> bool {
1587 let mask = ChannelState::ChannelFunded as u32 | BOTH_SIDES_SHUTDOWN_MASK;
1588 (self.channel_state & mask) == (ChannelState::ChannelFunded as u32)
1591 /// Returns true if this channel is currently available for use. This is a superset of
1592 /// is_usable() and considers things like the channel being temporarily disabled.
1593 pub fn is_live(&self) -> bool {
1597 /// Returns true if this channel is fully shut down. True here implies that no further actions
1598 /// may/will be taken on this channel, and thus this object should be freed. Any future changes
1599 /// will be handled appropriately by the chain monitor.
1600 pub fn is_shutdown(&self) -> bool {
1601 if (self.channel_state & ChannelState::ShutdownComplete as u32) == ChannelState::ShutdownComplete as u32 {
1602 assert!(self.channel_state == ChannelState::ShutdownComplete as u32);
1607 /// Called by channelmanager based on chain blocks being connected.
1608 /// Note that we only need to use this to detect funding_signed, anything else is handled by
1609 /// the channel_monitor.
1610 pub fn block_connected(&mut self, header: &BlockHeader, height: u32, txn_matched: &[&Transaction], indexes_of_txn_matched: &[u32]) -> Option<msgs::FundingLocked> {
1611 let non_shutdown_state = self.channel_state & (!BOTH_SIDES_SHUTDOWN_MASK);
1612 if self.funding_tx_confirmations > 0 {
1613 if header.bitcoin_hash() != self.last_block_connected {
1614 self.last_block_connected = header.bitcoin_hash();
1615 self.funding_tx_confirmations += 1;
1616 if self.funding_tx_confirmations == CONF_TARGET as u64 {
1617 if non_shutdown_state == ChannelState::FundingSent as u32 {
1618 self.channel_state |= ChannelState::OurFundingLocked as u32;
1619 } else if non_shutdown_state == (ChannelState::FundingSent as u32 | ChannelState::TheirFundingLocked as u32) {
1620 self.channel_state = ChannelState::ChannelFunded as u32 | (self.channel_state & BOTH_SIDES_SHUTDOWN_MASK);
1621 //TODO: Something about a state where we "lost confirmation"
1622 } else if self.channel_state < ChannelState::ChannelFunded as u32 {
1623 panic!("Started confirming a channel in a state pre-FundingSent?");
1625 self.funding_tx_confirmed_in = header.bitcoin_hash();
1627 //TODO: Note that this must be a duplicate of the previous commitment point they sent us,
1628 //as otherwise we will have a commitment transaction that they can't revoke (well, kinda,
1629 //they can by sending two revoke_and_acks back-to-back, but not really). This appears to be
1630 //a protocol oversight, but I assume I'm just missing something.
1631 let next_per_commitment_secret = self.build_local_commitment_secret(self.cur_local_commitment_transaction_number);
1632 let next_per_commitment_point = PublicKey::from_secret_key(&self.secp_ctx, &next_per_commitment_secret).unwrap();
1633 return Some(msgs::FundingLocked {
1634 channel_id: self.channel_id,
1635 next_per_commitment_point: next_per_commitment_point,
1640 if non_shutdown_state & !(ChannelState::TheirFundingLocked as u32) == ChannelState::FundingSent as u32 {
1641 for (ref tx, index_in_block) in txn_matched.iter().zip(indexes_of_txn_matched) {
1642 if tx.txid() == self.channel_monitor.get_funding_txo().unwrap().0 {
1643 let txo_idx = self.channel_monitor.get_funding_txo().unwrap().1 as usize;
1644 if txo_idx >= tx.output.len() || tx.output[txo_idx].script_pubkey != self.get_funding_redeemscript().to_v0_p2wsh() ||
1645 tx.output[txo_idx].value != self.channel_value_satoshis {
1646 self.channel_state = ChannelState::ShutdownComplete as u32;
1648 self.funding_tx_confirmations = 1;
1649 self.short_channel_id = Some(((height as u64) << (5*8)) |
1650 ((*index_in_block as u64) << (2*8)) |
1651 ((self.channel_monitor.get_funding_txo().unwrap().1 as u64) << (2*8)));
1659 /// Called by channelmanager based on chain blocks being disconnected.
1660 /// Returns true if we need to close the channel now due to funding transaction
1661 /// unconfirmation/reorg.
1662 pub fn block_disconnected(&mut self, header: &BlockHeader) -> bool {
1663 if self.funding_tx_confirmations > 0 {
1664 self.funding_tx_confirmations -= 1;
1665 if self.funding_tx_confirmations == UNCONF_THRESHOLD as u64 {
1669 if header.bitcoin_hash() == self.funding_tx_confirmed_in {
1670 self.funding_tx_confirmations = CONF_TARGET as u64 - 1;
1675 // Methods to get unprompted messages to send to the remote end (or where we already returned
1676 // something in the handler for the message that prompted this message):
1678 pub fn get_open_channel(&self, chain_hash: Sha256dHash, fee_estimator: &FeeEstimator) -> Result<msgs::OpenChannel, HandleError> {
1679 if !self.channel_outbound {
1680 panic!("Tried to open a channel for an inbound channel?");
1682 if self.channel_state != ChannelState::OurInitSent as u32 {
1683 return Err(HandleError{err: "Cannot generate an open_channel after we've moved forward", msg: None});
1686 if self.cur_local_commitment_transaction_number != (1 << 48) - 1 {
1687 panic!("Tried to send an open_channel for a channel that has already advanced");
1690 let local_commitment_secret = self.build_local_commitment_secret(self.cur_local_commitment_transaction_number);
1692 Ok(msgs::OpenChannel {
1693 chain_hash: chain_hash,
1694 temporary_channel_id: self.channel_id,
1695 funding_satoshis: self.channel_value_satoshis,
1696 push_msat: 0, //TODO: Something about feerate?
1697 dust_limit_satoshis: self.our_dust_limit_satoshis,
1698 max_htlc_value_in_flight_msat: Channel::get_our_max_htlc_value_in_flight_msat(self.channel_value_satoshis),
1699 channel_reserve_satoshis: Channel::get_our_channel_reserve_satoshis(self.channel_value_satoshis),
1700 htlc_minimum_msat: self.our_htlc_minimum_msat,
1701 feerate_per_kw: fee_estimator.get_est_sat_per_vbyte(ConfirmationTarget::Background) as u32 * 250,
1702 to_self_delay: BREAKDOWN_TIMEOUT,
1703 max_accepted_htlcs: OUR_MAX_HTLCS,
1704 funding_pubkey: PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.funding_key).unwrap(),
1705 revocation_basepoint: PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.revocation_base_key).unwrap(),
1706 payment_basepoint: PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.payment_base_key).unwrap(),
1707 delayed_payment_basepoint: PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.delayed_payment_base_key).unwrap(),
1708 htlc_basepoint: PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.htlc_base_key).unwrap(),
1709 first_per_commitment_point: PublicKey::from_secret_key(&self.secp_ctx, &local_commitment_secret).unwrap(),
1710 channel_flags: if self.announce_publicly {1} else {0},
1711 shutdown_scriptpubkey: None,
1715 pub fn get_accept_channel(&self) -> Result<msgs::AcceptChannel, HandleError> {
1716 if self.channel_outbound {
1717 panic!("Tried to send accept_channel for an outbound channel?");
1719 if self.channel_state != (ChannelState::OurInitSent as u32) | (ChannelState::TheirInitSent as u32) {
1720 panic!("Tried to send accept_channel after channel had moved forward");
1722 if self.cur_local_commitment_transaction_number != (1 << 48) - 1 {
1723 panic!("Tried to send an accept_channel for a channel that has already advanced");
1726 let local_commitment_secret = self.build_local_commitment_secret(self.cur_local_commitment_transaction_number);
1728 Ok(msgs::AcceptChannel {
1729 temporary_channel_id: self.channel_id,
1730 dust_limit_satoshis: self.our_dust_limit_satoshis,
1731 max_htlc_value_in_flight_msat: Channel::get_our_max_htlc_value_in_flight_msat(self.channel_value_satoshis),
1732 channel_reserve_satoshis: Channel::get_our_channel_reserve_satoshis(self.channel_value_satoshis),
1733 htlc_minimum_msat: self.our_htlc_minimum_msat,
1734 minimum_depth: CONF_TARGET,
1735 to_self_delay: BREAKDOWN_TIMEOUT,
1736 max_accepted_htlcs: OUR_MAX_HTLCS,
1737 funding_pubkey: PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.funding_key).unwrap(),
1738 revocation_basepoint: PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.revocation_base_key).unwrap(),
1739 payment_basepoint: PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.payment_base_key).unwrap(),
1740 delayed_payment_basepoint: PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.delayed_payment_base_key).unwrap(),
1741 htlc_basepoint: PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.htlc_base_key).unwrap(),
1742 first_per_commitment_point: PublicKey::from_secret_key(&self.secp_ctx, &local_commitment_secret).unwrap(),
1743 shutdown_scriptpubkey: None,
1747 fn get_outbound_funding_created_signature(&mut self) -> Result<Signature, HandleError> {
1748 let funding_script = self.get_funding_redeemscript();
1750 let remote_keys = self.build_remote_transaction_keys()?;
1751 let remote_initial_commitment_tx = self.build_commitment_transaction(self.cur_remote_commitment_transaction_number, &remote_keys, false, false).0;
1752 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();
1754 // We sign the "remote" commitment transaction, allowing them to broadcast the tx if they wish.
1755 Ok(self.secp_ctx.sign(&remote_sighash, &self.local_keys.funding_key).unwrap())
1758 /// Updates channel state with knowledge of the funding transaction's txid/index, and generates
1759 /// a funding_created message for the remote peer.
1760 /// Panics if called at some time other than immediately after initial handshake, if called twice,
1761 /// or if called on an inbound channel.
1762 /// Note that channel_id changes during this call!
1763 /// Do NOT broadcast the funding transaction until after a successful funding_signed call!
1764 pub fn get_outbound_funding_created(&mut self, funding_txid: Sha256dHash, funding_output_index: u16) -> Result<msgs::FundingCreated, HandleError> {
1765 if !self.channel_outbound {
1766 panic!("Tried to create outbound funding_created message on an inbound channel!");
1768 if self.channel_state != (ChannelState::OurInitSent as u32 | ChannelState::TheirInitSent as u32) {
1769 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)");
1771 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 {
1772 panic!("Should not have advanced channel commitment tx numbers prior to funding_created");
1775 self.channel_monitor.set_funding_info(funding_txid, funding_output_index);
1777 let our_signature = match self.get_outbound_funding_created_signature() {
1780 self.channel_monitor.unset_funding_info();
1785 let temporary_channel_id = self.channel_id;
1787 // Now that we're past error-generating stuff, update our local state:
1789 self.channel_state = ChannelState::FundingCreated as u32;
1790 let funding_txo = self.channel_monitor.get_funding_txo().unwrap();
1791 self.channel_id = funding_txo.0.into_be() ^ Uint256::from_u64(funding_txo.1 as u64).unwrap(); //TODO: or le?
1793 Ok(msgs::FundingCreated {
1794 temporary_channel_id: temporary_channel_id,
1795 funding_txid: funding_txid,
1796 funding_output_index: funding_output_index,
1797 signature: our_signature
1801 /// Gets an UnsignedChannelAnnouncement, as well as a signature covering it using our
1802 /// bitcoin_key, if available, for this channel. The channel must be publicly announceable and
1803 /// available for use (have exchanged FundingLocked messages in both directions. Should be used
1804 /// for both loose and in response to an AnnouncementSignatures message from the remote peer.
1805 /// Note that you can get an announcement for a channel which is closing, though you should
1806 /// likely not announce such a thing. In case its already been announced, a channel_update
1807 /// message can mark the channel disabled.
1808 pub fn get_channel_announcement(&self, our_node_id: PublicKey, chain_hash: Sha256dHash) -> Result<(msgs::UnsignedChannelAnnouncement, Signature), HandleError> {
1809 if !self.announce_publicly {
1810 return Err(HandleError{err: "Channel is not available for public announcements", msg: None});
1812 if self.channel_state & (ChannelState::ChannelFunded as u32) != (ChannelState::ChannelFunded as u32) {
1813 return Err(HandleError{err: "Cannot get a ChannelAnnouncement until the channel funding has been locked", msg: None});
1816 let were_node_one = our_node_id.serialize()[..] < self.their_node_id.serialize()[..];
1817 let our_bitcoin_key = PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.funding_key).unwrap();
1819 let msg = msgs::UnsignedChannelAnnouncement {
1820 features: msgs::GlobalFeatures::new(),
1821 chain_hash: chain_hash,
1822 short_channel_id: self.get_short_channel_id().unwrap(),
1823 node_id_1: if were_node_one { our_node_id } else { self.get_their_node_id() },
1824 node_id_2: if were_node_one { self.get_their_node_id() } else { our_node_id },
1825 bitcoin_key_1: if were_node_one { our_bitcoin_key } else { self.their_funding_pubkey },
1826 bitcoin_key_2: if were_node_one { self.their_funding_pubkey } else { our_bitcoin_key },
1829 let msghash = Message::from_slice(&Sha256dHash::from_data(&msg.encode()[..])[..]).unwrap();
1830 let sig = self.secp_ctx.sign(&msghash, &self.local_keys.funding_key).unwrap();
1836 // Send stuff to our remote peers:
1838 /// Adds a pending outbound HTLC to this channel, note that you probably want
1839 /// send_htlc_and_commit instead cause you'll want both messages at once.
1840 /// This returns an option instead of a pure UpdateAddHTLC as we may be in a state where we are
1841 /// waiting on the remote peer to send us a revoke_and_ack during which time we cannot add new
1842 /// HTLCs on the wire or we wouldn't be able to determine what they actually ACK'ed.
1843 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> {
1844 if (self.channel_state & (ChannelState::ChannelFunded as u32 | BOTH_SIDES_SHUTDOWN_MASK)) != (ChannelState::ChannelFunded as u32) {
1845 return Err(HandleError{err: "Cannot send HTLC until channel is fully established and we haven't started shutting down", msg: None});
1848 if amount_msat > self.channel_value_satoshis * 1000 {
1849 return Err(HandleError{err: "Cannot send more than the total value of the channel", msg: None});
1851 if amount_msat < self.their_htlc_minimum_msat {
1852 return Err(HandleError{err: "Cannot send less than their minimum HTLC value", msg: None});
1855 let (_, outbound_htlc_count, htlc_outbound_value_msat, htlc_inbound_value_msat) = self.get_pending_htlc_stats();
1856 if outbound_htlc_count + 1 > self.their_max_accepted_htlcs as u32 {
1857 return Err(HandleError{err: "Cannot push more than their max accepted HTLCs", msg: None});
1859 //TODO: Spec is unclear if this is per-direction or in total (I assume per direction):
1860 // Check their_max_htlc_value_in_flight_msat
1861 if htlc_outbound_value_msat + amount_msat > self.their_max_htlc_value_in_flight_msat {
1862 return Err(HandleError{err: "Cannot send value that would put us over our max HTLC value in flight", msg: None});
1864 // Check their_channel_reserve_satoshis:
1865 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 {
1866 return Err(HandleError{err: "Cannot send value that would put us over our reserve value", msg: None});
1869 //TODO: Check cltv_expiry? Do this in channel manager?
1871 // Now update local state:
1872 if (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32)) == (ChannelState::AwaitingRemoteRevoke as u32) {
1873 //TODO: Check the limits *including* other pending holding cell HTLCs!
1874 self.holding_cell_htlcs.push(HTLCOutputAwaitingACK {
1875 amount_msat: amount_msat,
1876 payment_hash: payment_hash,
1877 cltv_expiry: cltv_expiry,
1878 onion_routing_packet: onion_routing_packet,
1879 time_created: Instant::now(),
1884 self.pending_htlcs.push(HTLCOutput {
1886 htlc_id: self.next_local_htlc_id,
1887 amount_msat: amount_msat,
1888 payment_hash: payment_hash.clone(),
1889 cltv_expiry: cltv_expiry,
1890 state: HTLCState::LocalAnnounced,
1891 pending_forward_state: None
1894 let res = msgs::UpdateAddHTLC {
1895 channel_id: self.channel_id,
1896 htlc_id: self.next_local_htlc_id,
1897 amount_msat: amount_msat,
1898 payment_hash: payment_hash,
1899 cltv_expiry: cltv_expiry,
1900 onion_routing_packet: onion_routing_packet,
1902 self.next_local_htlc_id += 1;
1907 /// Creates a signed commitment transaction to send to the remote peer.
1908 pub fn send_commitment(&mut self) -> Result<msgs::CommitmentSigned, HandleError> {
1909 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
1910 return Err(HandleError{err: "Cannot create commitment tx until channel is fully established", msg: None});
1912 if (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32)) == (ChannelState::AwaitingRemoteRevoke as u32) {
1913 return Err(HandleError{err: "Cannot create commitment tx until remote revokes their previous commitment", msg: None});
1915 let mut have_updates = false; // TODO initialize with "have we sent a fee update?"
1916 for htlc in self.pending_htlcs.iter() {
1917 if htlc.state == HTLCState::LocalAnnounced {
1918 have_updates = true;
1920 if have_updates { break; }
1923 return Err(HandleError{err: "Cannot create commitment tx until we have some updates to send", msg: None});
1926 let funding_script = self.get_funding_redeemscript();
1928 let remote_keys = self.build_remote_transaction_keys()?;
1929 let remote_commitment_tx = self.build_commitment_transaction(self.cur_remote_commitment_transaction_number, &remote_keys, false, true);
1930 let remote_commitment_txid = remote_commitment_tx.0.txid();
1931 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();
1932 let our_sig = self.secp_ctx.sign(&remote_sighash, &self.local_keys.funding_key).unwrap();
1934 let mut htlc_sigs = Vec::new();
1936 for ref htlc in remote_commitment_tx.1.iter() {
1937 let htlc_tx = self.build_htlc_transaction(&remote_commitment_txid, htlc, false, &remote_keys)?;
1938 let htlc_redeemscript = chan_utils::get_htlc_redeemscript(&htlc, &remote_keys);
1939 let htlc_sighash = Message::from_slice(&bip143::SighashComponents::new(&htlc_tx).sighash_all(&htlc_tx.input[0], &htlc_redeemscript, htlc.amount_msat / 1000)[..]).unwrap();
1940 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));
1941 htlc_sigs.push(self.secp_ctx.sign(&htlc_sighash, &our_htlc_key).unwrap());
1944 // Update state now that we've passed all the can-fail calls...
1945 self.channel_state |= ChannelState::AwaitingRemoteRevoke as u32;
1947 Ok(msgs::CommitmentSigned {
1948 channel_id: self.channel_id,
1950 htlc_signatures: htlc_sigs,
1954 /// Adds a pending outbound HTLC to this channel, and creates a signed commitment transaction
1955 /// to send to the remote peer in one go.
1956 /// Shorthand for calling send_htlc() followed by send_commitment(), see docs on those for
1958 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)>, HandleError> {
1959 match self.send_htlc(amount_msat, payment_hash, cltv_expiry, onion_routing_packet)? {
1960 Some(update_add_htlc) =>
1961 Ok(Some((update_add_htlc, self.send_commitment()?))),
1966 /// Begins the shutdown process, getting a message for the remote peer and returning all
1967 /// holding cell HTLCs for payment failure.
1968 pub fn get_shutdown(&mut self) -> Result<(msgs::Shutdown, Vec<[u8; 32]>), HandleError> {
1969 for htlc in self.pending_htlcs.iter() {
1970 if htlc.state == HTLCState::LocalAnnounced {
1971 return Err(HandleError{err: "Cannot begin shutdown with pending HTLCs, call send_commitment first", msg: None});
1974 if self.channel_state & BOTH_SIDES_SHUTDOWN_MASK != 0 {
1975 return Err(HandleError{err: "Shutdown already in progress", msg: None});
1977 assert_eq!(self.channel_state & ChannelState::ShutdownComplete as u32, 0);
1979 let our_closing_script = self.get_closing_scriptpubkey();
1981 // From here on out, we may not fail!
1982 if self.channel_state < ChannelState::FundingSent as u32 {
1983 self.channel_state = ChannelState::ShutdownComplete as u32;
1985 self.channel_state |= ChannelState::LocalShutdownSent as u32;
1988 // We can't send our shutdown until we've committed all of our pending HTLCs, but the
1989 // remote side is unlikely to accept any new HTLCs, so we go ahead and "free" any holding
1990 // cell HTLCs and return them to fail the payment.
1991 let mut dropped_outbound_htlcs = Vec::with_capacity(self.holding_cell_htlcs.len());
1992 for htlc in self.holding_cell_htlcs.drain(..) {
1993 dropped_outbound_htlcs.push(htlc.payment_hash);
1996 Ok((msgs::Shutdown {
1997 channel_id: self.channel_id,
1998 scriptpubkey: our_closing_script,
1999 }, dropped_outbound_htlcs))
2005 use bitcoin::util::misc::hex_bytes;
2006 use bitcoin::util::hash::Sha256dHash;
2007 use bitcoin::util::bip143;
2008 use bitcoin::network::serialize::serialize;
2009 use bitcoin::blockdata::transaction::Transaction;
2010 use ln::channel::{Channel,HTLCOutput,HTLCState,HTLCOutputInCommitment,TxCreationKeys};
2012 use chain::chaininterface::{FeeEstimator,ConfirmationTarget};
2013 use secp256k1::{Secp256k1,Message,Signature};
2014 use secp256k1::key::{SecretKey,PublicKey};
2015 use crypto::sha2::Sha256;
2016 use crypto::digest::Digest;
2018 struct TestFeeEstimator {
2021 impl FeeEstimator for TestFeeEstimator {
2022 fn get_est_sat_per_vbyte(&self, _: ConfirmationTarget) -> u64 {
2028 fn outbound_commitment_test() {
2029 // Test vectors from BOLT 3 Appendix C:
2030 let feeest = TestFeeEstimator{fee_est: 15000/250};
2031 let mut chan = Channel::new_outbound(&feeest, PublicKey::new(), 10000000, false, 42); // Nothing uses their network key in this test
2032 chan.their_to_self_delay = 144;
2033 chan.our_dust_limit_satoshis = 546;
2035 let secp_ctx = Secp256k1::new();
2037 chan.local_keys.funding_key = SecretKey::from_slice(&secp_ctx, &hex_bytes("30ff4956bbdd3222d44cc5e8a1261dab1e07957bdac5ae88fe3261ef321f3749").unwrap()[..]).unwrap();
2038 assert_eq!(PublicKey::from_secret_key(&secp_ctx, &chan.local_keys.funding_key).unwrap().serialize()[..],
2039 hex_bytes("023da092f6980e58d2c037173180e9a465476026ee50f96695963e8efe436f54eb").unwrap()[..]);
2041 chan.local_keys.payment_base_key = SecretKey::from_slice(&secp_ctx, &hex_bytes("1111111111111111111111111111111111111111111111111111111111111111").unwrap()[..]).unwrap();
2042 chan.local_keys.delayed_payment_base_key = SecretKey::from_slice(&secp_ctx, &hex_bytes("3333333333333333333333333333333333333333333333333333333333333333").unwrap()[..]).unwrap();
2043 chan.local_keys.htlc_base_key = SecretKey::from_slice(&secp_ctx, &hex_bytes("1111111111111111111111111111111111111111111111111111111111111111").unwrap()[..]).unwrap();
2044 // chan.local_keys.commitment_seed isn't derived in the test vectors :(
2046 chan.channel_monitor.set_funding_info(Sha256dHash::from_hex("8984484a580b825b9972d7adb15050b3ab624ccd731946b3eeddb92f4e7ef6be").unwrap(), 0);
2048 chan.their_payment_basepoint = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&secp_ctx, &hex_bytes("4444444444444444444444444444444444444444444444444444444444444444").unwrap()[..]).unwrap()).unwrap();
2049 assert_eq!(chan.their_payment_basepoint.serialize()[..],
2050 hex_bytes("032c0b7cf95324a07d05398b240174dc0c2be444d96b159aa6c7f7b1e668680991").unwrap()[..]);
2052 chan.their_funding_pubkey = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&secp_ctx, &hex_bytes("1552dfba4f6cf29a62a0af13c8d6981d36d0ef8d61ba10fb0fe90da7634d7e13").unwrap()[..]).unwrap()).unwrap();
2053 assert_eq!(chan.their_funding_pubkey.serialize()[..],
2054 hex_bytes("030e9f7b623d2ccc7c9bd44d66d5ce21ce504c0acf6385a132cec6d3c39fa711c1").unwrap()[..]);
2056 chan.their_htlc_basepoint = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&secp_ctx, &hex_bytes("4444444444444444444444444444444444444444444444444444444444444444").unwrap()[..]).unwrap()).unwrap();
2057 assert_eq!(chan.their_htlc_basepoint.serialize()[..],
2058 hex_bytes("032c0b7cf95324a07d05398b240174dc0c2be444d96b159aa6c7f7b1e668680991").unwrap()[..]);
2060 chan.their_revocation_basepoint = PublicKey::from_slice(&secp_ctx, &hex_bytes("02466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f27").unwrap()[..]).unwrap();
2062 // We can't just use build_local_transaction_keys here as the per_commitment_secret is not
2063 // derived from a commitment_seed, so instead we copy it here and call
2064 // build_commitment_transaction.
2065 let delayed_payment_base = PublicKey::from_secret_key(&secp_ctx, &chan.local_keys.delayed_payment_base_key).unwrap();
2066 let per_commitment_secret = SecretKey::from_slice(&secp_ctx, &hex_bytes("1f1e1d1c1b1a191817161514131211100f0e0d0c0b0a09080706050403020100").unwrap()[..]).unwrap();
2067 let per_commitment_point = PublicKey::from_secret_key(&secp_ctx, &per_commitment_secret).unwrap();
2068 let htlc_basepoint = PublicKey::from_secret_key(&secp_ctx, &chan.local_keys.htlc_base_key).unwrap();
2069 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();
2071 let mut unsigned_tx: (Transaction, Vec<HTLCOutputInCommitment>);
2073 macro_rules! test_commitment {
2074 ( $their_sig_hex: expr, $our_sig_hex: expr, $tx_hex: expr) => {
2075 unsigned_tx = chan.build_commitment_transaction(42, &keys, true, false);
2076 let their_signature = Signature::from_der(&secp_ctx, &hex_bytes($their_sig_hex).unwrap()[..]).unwrap();
2077 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();
2078 secp_ctx.verify(&sighash, &their_signature, &chan.their_funding_pubkey).unwrap();
2080 chan.sign_commitment_transaction(&mut unsigned_tx.0, &their_signature);
2082 assert_eq!(serialize(&unsigned_tx.0).unwrap()[..],
2083 hex_bytes($tx_hex).unwrap()[..]);
2087 macro_rules! test_htlc_output {
2088 ( $htlc_idx: expr, $their_sig_hex: expr, $our_sig_hex: expr, $tx_hex: expr ) => {
2089 let remote_signature = Signature::from_der(&secp_ctx, &hex_bytes($their_sig_hex).unwrap()[..]).unwrap();
2091 let ref htlc = unsigned_tx.1[$htlc_idx];
2092 let mut htlc_tx = chan.build_htlc_transaction(&unsigned_tx.0.txid(), &htlc, true, &keys).unwrap();
2093 let htlc_redeemscript = chan_utils::get_htlc_redeemscript(&htlc, &keys);
2094 let htlc_sighash = Message::from_slice(&bip143::SighashComponents::new(&htlc_tx).sighash_all(&htlc_tx.input[0], &htlc_redeemscript, htlc.amount_msat / 1000)[..]).unwrap();
2095 secp_ctx.verify(&htlc_sighash, &remote_signature, &keys.b_htlc_key).unwrap();
2097 let mut preimage: Option<[u8; 32]> = None;
2100 let mut sha = Sha256::new();
2101 sha.input(&[i; 32]);
2103 let mut out = [0; 32];
2104 sha.result(&mut out);
2106 if out == htlc.payment_hash {
2107 preimage = Some([i; 32]);
2111 assert!(preimage.is_some());
2114 chan.sign_htlc_transaction(&mut htlc_tx, &remote_signature, &preimage, &htlc, &keys).unwrap();
2115 assert_eq!(serialize(&htlc_tx).unwrap()[..],
2116 hex_bytes($tx_hex).unwrap()[..]);
2121 // simple commitment tx with no HTLCs
2122 chan.value_to_self_msat = 7000000000;
2124 test_commitment!("3045022100f51d2e566a70ba740fc5d8c0f07b9b93d2ed741c3c0860c613173de7d39e7968022041376d520e9c0e1ad52248ddf4b22e12be8763007df977253ef45a4ca3bdb7c0",
2125 "3044022051b75c73198c6deee1a875871c3961832909acd297c6b908d59e3319e5185a46022055c419379c5051a78d00dbbce11b5b664a0c22815fbcc6fcef6b1937c3836939",
2126 "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");
2129 chan.pending_htlcs.push({
2130 let mut out = HTLCOutput{
2133 amount_msat: 1000000,
2135 payment_hash: [0; 32],
2136 state: HTLCState::Committed,
2137 pending_forward_state: None,
2139 let mut sha = Sha256::new();
2140 sha.input(&hex_bytes("0000000000000000000000000000000000000000000000000000000000000000").unwrap());
2141 sha.result(&mut out.payment_hash);
2144 chan.pending_htlcs.push({
2145 let mut out = HTLCOutput{
2148 amount_msat: 2000000,
2150 payment_hash: [0; 32],
2151 state: HTLCState::Committed,
2152 pending_forward_state: None,
2154 let mut sha = Sha256::new();
2155 sha.input(&hex_bytes("0101010101010101010101010101010101010101010101010101010101010101").unwrap());
2156 sha.result(&mut out.payment_hash);
2159 chan.pending_htlcs.push({
2160 let mut out = HTLCOutput{
2163 amount_msat: 2000000,
2165 payment_hash: [0; 32],
2166 state: HTLCState::Committed,
2167 pending_forward_state: None,
2169 let mut sha = Sha256::new();
2170 sha.input(&hex_bytes("0202020202020202020202020202020202020202020202020202020202020202").unwrap());
2171 sha.result(&mut out.payment_hash);
2174 chan.pending_htlcs.push({
2175 let mut out = HTLCOutput{
2178 amount_msat: 3000000,
2180 payment_hash: [0; 32],
2181 state: HTLCState::Committed,
2182 pending_forward_state: None,
2184 let mut sha = Sha256::new();
2185 sha.input(&hex_bytes("0303030303030303030303030303030303030303030303030303030303030303").unwrap());
2186 sha.result(&mut out.payment_hash);
2189 chan.pending_htlcs.push({
2190 let mut out = HTLCOutput{
2193 amount_msat: 4000000,
2195 payment_hash: [0; 32],
2196 state: HTLCState::Committed,
2197 pending_forward_state: None,
2199 let mut sha = Sha256::new();
2200 sha.input(&hex_bytes("0404040404040404040404040404040404040404040404040404040404040404").unwrap());
2201 sha.result(&mut out.payment_hash);
2206 // commitment tx with all five HTLCs untrimmed (minimum feerate)
2207 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
2208 chan.feerate_per_kw = 0;
2210 test_commitment!("304402204fd4928835db1ccdfc40f5c78ce9bd65249b16348df81f0c44328dcdefc97d630220194d3869c38bc732dd87d13d2958015e2fc16829e74cd4377f84d215c0b70606",
2211 "30440220275b0c325a5e9355650dc30c0eccfbc7efb23987c24b556b9dfdd40effca18d202206caceb2c067836c51f296740c7ae807ffcbfbf1dd3a0d56b6de9a5b247985f06",
2212 "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");
2214 assert_eq!(unsigned_tx.1.len(), 5);
2216 test_htlc_output!(0,
2217 "304402206a6e59f18764a5bf8d4fa45eebc591566689441229c918b480fb2af8cc6a4aeb02205248f273be447684b33e3c8d1d85a8e0ca9fa0bae9ae33f0527ada9c162919a6",
2218 "304402207cb324fa0de88f452ffa9389678127ebcf4cabe1dd848b8e076c1a1962bf34720220116ed922b12311bd602d67e60d2529917f21c5b82f25ff6506c0f87886b4dfd5",
2219 "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");
2221 test_htlc_output!(1,
2222 "3045022100d5275b3619953cb0c3b5aa577f04bc512380e60fa551762ce3d7a1bb7401cff9022037237ab0dac3fe100cde094e82e2bed9ba0ed1bb40154b48e56aa70f259e608b",
2223 "3045022100c89172099507ff50f4c925e6c5150e871fb6e83dd73ff9fbb72f6ce829a9633f02203a63821d9162e99f9be712a68f9e589483994feae2661e4546cd5b6cec007be5",
2224 "020000000001018154ecccf11a5fb56c39654c4deb4d2296f83c69268280b94d021370c94e219701000000000000000001d0070000000000002200204adb4e2f00643db396dd120d4e7dc17625f5f2c11a40d857accc862d6b7dd80e0500483045022100d5275b3619953cb0c3b5aa577f04bc512380e60fa551762ce3d7a1bb7401cff9022037237ab0dac3fe100cde094e82e2bed9ba0ed1bb40154b48e56aa70f259e608b01483045022100c89172099507ff50f4c925e6c5150e871fb6e83dd73ff9fbb72f6ce829a9633f02203a63821d9162e99f9be712a68f9e589483994feae2661e4546cd5b6cec007be501008576a91414011f7254d96b819c76986c277d115efce6f7b58763ac67210394854aa6eab5b2a8122cc726e9dded053a2184d88256816826d6231c068d4a5b7c820120876475527c21030d417a46946384f88d5f3337267c5e579765875dc4daca813e21734b140639e752ae67a914b43e1b38138a41b37f7cd9a1d274bc63e3a9b5d188ac6868f6010000");
2226 test_htlc_output!(2,
2227 "304402201b63ec807771baf4fdff523c644080de17f1da478989308ad13a58b51db91d360220568939d38c9ce295adba15665fa68f51d967e8ed14a007b751540a80b325f202",
2228 "3045022100def389deab09cee69eaa1ec14d9428770e45bcbe9feb46468ecf481371165c2f022015d2e3c46600b2ebba8dcc899768874cc6851fd1ecb3fffd15db1cc3de7e10da",
2229 "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");
2231 test_htlc_output!(3,
2232 "3045022100daee1808f9861b6c3ecd14f7b707eca02dd6bdfc714ba2f33bc8cdba507bb182022026654bf8863af77d74f51f4e0b62d461a019561bb12acb120d3f7195d148a554",
2233 "30440220643aacb19bbb72bd2b635bc3f7375481f5981bace78cdd8319b2988ffcc6704202203d27784ec8ad51ed3bd517a05525a5139bb0b755dd719e0054332d186ac08727",
2234 "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");
2236 test_htlc_output!(4,
2237 "304402207e0410e45454b0978a623f36a10626ef17b27d9ad44e2760f98cfa3efb37924f0220220bd8acd43ecaa916a80bd4f919c495a2c58982ce7c8625153f8596692a801d",
2238 "30440220549e80b4496803cbc4a1d09d46df50109f546d43fbbf86cd90b174b1484acd5402205f12a4f995cb9bded597eabfee195a285986aa6d93ae5bb72507ebc6a4e2349e",
2239 "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");
2243 // commitment tx with seven outputs untrimmed (maximum feerate)
2244 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
2245 chan.feerate_per_kw = 647;
2247 test_commitment!("3045022100a5c01383d3ec646d97e40f44318d49def817fcd61a0ef18008a665b3e151785502203e648efddd5838981ef55ec954be69c4a652d021e6081a100d034de366815e9b",
2248 "304502210094bfd8f5572ac0157ec76a9551b6c5216a4538c07cd13a51af4a54cb26fa14320220768efce8ce6f4a5efac875142ff19237c011343670adf9c7ac69704a120d1163",
2249 "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");
2251 assert_eq!(unsigned_tx.1.len(), 5);
2253 test_htlc_output!(0,
2254 "30440220385a5afe75632f50128cbb029ee95c80156b5b4744beddc729ad339c9ca432c802202ba5f48550cad3379ac75b9b4fedb86a35baa6947f16ba5037fb8b11ab343740",
2255 "304402205999590b8a79fa346e003a68fd40366397119b2b0cdf37b149968d6bc6fbcc4702202b1e1fb5ab7864931caed4e732c359e0fe3d86a548b557be2246efb1708d579a",
2256 "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");
2258 test_htlc_output!(1,
2259 "304402207ceb6678d4db33d2401fdc409959e57c16a6cb97a30261d9c61f29b8c58d34b90220084b4a17b4ca0e86f2d798b3698ca52de5621f2ce86f80bed79afa66874511b0",
2260 "304402207ff03eb0127fc7c6cae49cc29e2a586b98d1e8969cf4a17dfa50b9c2647720b902205e2ecfda2252956c0ca32f175080e75e4e390e433feb1f8ce9f2ba55648a1dac",
2261 "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");
2263 test_htlc_output!(2,
2264 "304402206a401b29a0dff0d18ec903502c13d83e7ec019450113f4a7655a4ce40d1f65ba0220217723a084e727b6ca0cc8b6c69c014a7e4a01fcdcba3e3993f462a3c574d833",
2265 "3045022100d50d067ca625d54e62df533a8f9291736678d0b86c28a61bb2a80cf42e702d6e02202373dde7e00218eacdafb9415fe0e1071beec1857d1af3c6a201a44cbc47c877",
2266 "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");
2268 test_htlc_output!(3,
2269 "30450221009b1c987ba599ee3bde1dbca776b85481d70a78b681a8d84206723e2795c7cac002207aac84ad910f8598c4d1c0ea2e3399cf6627a4e3e90131315bc9f038451ce39d",
2270 "3045022100db9dc65291077a52728c622987e9895b7241d4394d6dcb916d7600a3e8728c22022036ee3ee717ba0bb5c45ee84bc7bbf85c0f90f26ae4e4a25a6b4241afa8a3f1cb",
2271 "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");
2273 test_htlc_output!(4,
2274 "3045022100cc28030b59f0914f45b84caa983b6f8effa900c952310708c2b5b00781117022022027ba2ccdf94d03c6d48b327f183f6e28c8a214d089b9227f94ac4f85315274f0",
2275 "304402202d1a3c0d31200265d2a2def2753ead4959ae20b4083e19553acfffa5dfab60bf022020ede134149504e15b88ab261a066de49848411e15e70f9e6a5462aec2949f8f",
2276 "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");
2280 // commitment tx with six outputs untrimmed (minimum feerate)
2281 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
2282 chan.feerate_per_kw = 648;
2284 test_commitment!("3044022072714e2fbb93cdd1c42eb0828b4f2eff143f717d8f26e79d6ada4f0dcb681bbe02200911be4e5161dd6ebe59ff1c58e1997c4aea804f81db6b698821db6093d7b057",
2285 "3045022100a2270d5950c89ae0841233f6efea9c951898b301b2e89e0adbd2c687b9f32efa02207943d90f95b9610458e7c65a576e149750ff3accaacad004cd85e70b235e27de",
2286 "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");
2288 assert_eq!(unsigned_tx.1.len(), 4);
2290 test_htlc_output!(0,
2291 "3044022062ef2e77591409d60d7817d9bb1e71d3c4a2931d1a6c7c8307422c84f001a251022022dad9726b0ae3fe92bda745a06f2c00f92342a186d84518588cf65f4dfaada8",
2292 "3045022100a4c574f00411dd2f978ca5cdc1b848c311cd7849c087ad2f21a5bce5e8cc5ae90220090ae39a9bce2fb8bc879d7e9f9022df249f41e25e51f1a9bf6447a9eeffc098",
2293 "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");
2295 test_htlc_output!(1,
2296 "3045022100e968cbbb5f402ed389fdc7f6cd2a80ed650bb42c79aeb2a5678444af94f6c78502204b47a1cb24ab5b0b6fe69fe9cfc7dba07b9dd0d8b95f372c1d9435146a88f8d4",
2297 "304402207679cf19790bea76a733d2fa0672bd43ab455687a068f815a3d237581f57139a0220683a1a799e102071c206b207735ca80f627ab83d6616b4bcd017c5d79ef3e7d0",
2298 "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");
2300 test_htlc_output!(2,
2301 "3045022100aa91932e305292cf9969cc23502bbf6cef83a5df39c95ad04a707c4f4fed5c7702207099fc0f3a9bfe1e7683c0e9aa5e76c5432eb20693bf4cb182f04d383dc9c8c2",
2302 "304402200df76fea718745f3c529bac7fd37923e7309ce38b25c0781e4cf514dd9ef8dc802204172295739dbae9fe0474dcee3608e3433b4b2af3a2e6787108b02f894dcdda3",
2303 "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");
2305 test_htlc_output!(3,
2306 "3044022035cac88040a5bba420b1c4257235d5015309113460bc33f2853cd81ca36e632402202fc94fd3e81e9d34a9d01782a0284f3044370d03d60f3fc041e2da088d2de58f",
2307 "304402200daf2eb7afd355b4caf6fb08387b5f031940ea29d1a9f35071288a839c9039e4022067201b562456e7948616c13acb876b386b511599b58ac1d94d127f91c50463a6",
2308 "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");
2312 // commitment tx with six outputs untrimmed (maximum feerate)
2313 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
2314 chan.feerate_per_kw = 2069;
2316 test_commitment!("3044022001d55e488b8b035b2dd29d50b65b530923a416d47f377284145bc8767b1b6a75022019bb53ddfe1cefaf156f924777eaaf8fdca1810695a7d0a247ad2afba8232eb4",
2317 "304402203ca8f31c6a47519f83255dc69f1894d9a6d7476a19f498d31eaf0cd3a85eeb63022026fd92dc752b33905c4c838c528b692a8ad4ced959990b5d5ee2ff940fa90eea",
2318 "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");
2320 assert_eq!(unsigned_tx.1.len(), 4);
2322 test_htlc_output!(0,
2323 "3045022100d1cf354de41c1369336cf85b225ed033f1f8982a01be503668df756a7e668b66022001254144fb4d0eecc61908fccc3388891ba17c5d7a1a8c62bdd307e5a513f992",
2324 "3044022056eb1af429660e45a1b0b66568cb8c4a3aa7e4c9c292d5d6c47f86ebf2c8838f022065c3ac4ebe980ca7a41148569be4ad8751b0a724a41405697ec55035dae66402",
2325 "02000000000101ca94a9ad516ebc0c4bdd7b6254871babfa978d5accafb554214137d398bfcf6a0000000000000000000175020000000000002200204adb4e2f00643db396dd120d4e7dc17625f5f2c11a40d857accc862d6b7dd80e0500483045022100d1cf354de41c1369336cf85b225ed033f1f8982a01be503668df756a7e668b66022001254144fb4d0eecc61908fccc3388891ba17c5d7a1a8c62bdd307e5a513f99201473044022056eb1af429660e45a1b0b66568cb8c4a3aa7e4c9c292d5d6c47f86ebf2c8838f022065c3ac4ebe980ca7a41148569be4ad8751b0a724a41405697ec55035dae6640201008576a91414011f7254d96b819c76986c277d115efce6f7b58763ac67210394854aa6eab5b2a8122cc726e9dded053a2184d88256816826d6231c068d4a5b7c820120876475527c21030d417a46946384f88d5f3337267c5e579765875dc4daca813e21734b140639e752ae67a914b43e1b38138a41b37f7cd9a1d274bc63e3a9b5d188ac6868f6010000");
2327 test_htlc_output!(1,
2328 "3045022100d065569dcb94f090345402736385efeb8ea265131804beac06dd84d15dd2d6880220664feb0b4b2eb985fadb6ec7dc58c9334ea88ce599a9be760554a2d4b3b5d9f4",
2329 "3045022100914bb232cd4b2690ee3d6cb8c3713c4ac9c4fb925323068d8b07f67c8541f8d9022057152f5f1615b793d2d45aac7518989ae4fe970f28b9b5c77504799d25433f7f",
2330 "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");
2332 test_htlc_output!(2,
2333 "3045022100d4e69d363de993684eae7b37853c40722a4c1b4a7b588ad7b5d8a9b5006137a102207a069c628170ee34be5612747051bdcc087466dbaa68d5756ea81c10155aef18",
2334 "304402200e362443f7af830b419771e8e1614fc391db3a4eb799989abfc5ab26d6fcd032022039ab0cad1c14dfbe9446bf847965e56fe016e0cbcf719fd18c1bfbf53ecbd9f9",
2335 "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");
2337 test_htlc_output!(3,
2338 "30450221008ec888e36e4a4b3dc2ed6b823319855b2ae03006ca6ae0d9aa7e24bfc1d6f07102203b0f78885472a67ff4fe5916c0bb669487d659527509516fc3a08e87a2cc0a7c",
2339 "304402202c3e14282b84b02705dfd00a6da396c9fe8a8bcb1d3fdb4b20a4feba09440e8b02202b058b39aa9b0c865b22095edcd9ff1f71bbfe20aa4993755e54d042755ed0d5",
2340 "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");
2344 // commitment tx with five outputs untrimmed (minimum feerate)
2345 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
2346 chan.feerate_per_kw = 2070;
2348 test_commitment!("3045022100f2377f7a67b7fc7f4e2c0c9e3a7de935c32417f5668eda31ea1db401b7dc53030220415fdbc8e91d0f735e70c21952342742e25249b0d062d43efbfc564499f37526",
2349 "30440220443cb07f650aebbba14b8bc8d81e096712590f524c5991ac0ed3bbc8fd3bd0c7022028a635f548e3ca64b19b69b1ea00f05b22752f91daf0b6dab78e62ba52eb7fd0",
2350 "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");
2352 assert_eq!(unsigned_tx.1.len(), 3);
2354 test_htlc_output!(0,
2355 "3045022100eed143b1ee4bed5dc3cde40afa5db3e7354cbf9c44054b5f713f729356f08cf7022077161d171c2bbd9badf3c9934de65a4918de03bbac1450f715275f75b103f891",
2356 "3045022100a0d043ed533e7fb1911e0553d31a8e2f3e6de19dbc035257f29d747c5e02f1f5022030cd38d8e84282175d49c1ebe0470db3ebd59768cf40780a784e248a43904fb8",
2357 "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");
2359 test_htlc_output!(1,
2360 "3044022071e9357619fd8d29a411dc053b326a5224c5d11268070e88ecb981b174747c7a02202b763ae29a9d0732fa8836dd8597439460b50472183f420021b768981b4f7cf6",
2361 "3045022100adb1d679f65f96178b59f23ed37d3b70443118f345224a07ecb043eee2acc157022034d24524fe857144a3bcfff3065a9994d0a6ec5f11c681e49431d573e242612d",
2362 "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");
2364 test_htlc_output!(2,
2365 "3045022100c9458a4d2cbb741705577deb0a890e5cb90ee141be0400d3162e533727c9cb2102206edcf765c5dc5e5f9b976ea8149bf8607b5a0efb30691138e1231302b640d2a4",
2366 "304402200831422aa4e1ee6d55e0b894201770a8f8817a189356f2d70be76633ffa6a6f602200dd1b84a4855dc6727dd46c98daae43dfc70889d1ba7ef0087529a57c06e5e04",
2367 "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");
2371 // commitment tx with five outputs untrimmed (maximum feerate)
2372 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
2373 chan.feerate_per_kw = 2194;
2375 test_commitment!("3045022100d33c4e541aa1d255d41ea9a3b443b3b822ad8f7f86862638aac1f69f8f760577022007e2a18e6931ce3d3a804b1c78eda1de17dbe1fb7a95488c9a4ec86203953348",
2376 "304402203b1b010c109c2ecbe7feb2d259b9c4126bd5dc99ee693c422ec0a5781fe161ba0220571fe4e2c649dea9c7aaf7e49b382962f6a3494963c97d80fef9a430ca3f7061",
2377 "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");
2379 assert_eq!(unsigned_tx.1.len(), 3);
2381 test_htlc_output!(0,
2382 "30450221009ed2f0a67f99e29c3c8cf45c08207b765980697781bb727fe0b1416de0e7622902206052684229bc171419ed290f4b615c943f819c0262414e43c5b91dcf72ddcf44",
2383 "3044022004ad5f04ae69c71b3b141d4db9d0d4c38d84009fb3cfeeae6efdad414487a9a0022042d3fe1388c1ff517d1da7fb4025663d372c14728ed52dc88608363450ff6a2f",
2384 "02000000000101fb824d4e4dafc0f567789dee3a6bce8d411fe80f5563d8cdfdcc7d7e4447d43a0000000000000000000122020000000000002200204adb4e2f00643db396dd120d4e7dc17625f5f2c11a40d857accc862d6b7dd80e05004830450221009ed2f0a67f99e29c3c8cf45c08207b765980697781bb727fe0b1416de0e7622902206052684229bc171419ed290f4b615c943f819c0262414e43c5b91dcf72ddcf4401473044022004ad5f04ae69c71b3b141d4db9d0d4c38d84009fb3cfeeae6efdad414487a9a0022042d3fe1388c1ff517d1da7fb4025663d372c14728ed52dc88608363450ff6a2f01008576a91414011f7254d96b819c76986c277d115efce6f7b58763ac67210394854aa6eab5b2a8122cc726e9dded053a2184d88256816826d6231c068d4a5b7c820120876475527c21030d417a46946384f88d5f3337267c5e579765875dc4daca813e21734b140639e752ae67a914b43e1b38138a41b37f7cd9a1d274bc63e3a9b5d188ac6868f6010000");
2386 test_htlc_output!(1,
2387 "30440220155d3b90c67c33a8321996a9be5b82431b0c126613be751d400669da9d5c696702204318448bcd48824439d2c6a70be6e5747446be47ff45977cf41672bdc9b6b12d",
2388 "304402201707050c870c1f77cc3ed58d6d71bf281de239e9eabd8ef0955bad0d7fe38dcc02204d36d80d0019b3a71e646a08fa4a5607761d341ae8be371946ebe437c289c915",
2389 "02000000000101fb824d4e4dafc0f567789dee3a6bce8d411fe80f5563d8cdfdcc7d7e4447d43a010000000000000000010a060000000000002200204adb4e2f00643db396dd120d4e7dc17625f5f2c11a40d857accc862d6b7dd80e05004730440220155d3b90c67c33a8321996a9be5b82431b0c126613be751d400669da9d5c696702204318448bcd48824439d2c6a70be6e5747446be47ff45977cf41672bdc9b6b12d0147304402201707050c870c1f77cc3ed58d6d71bf281de239e9eabd8ef0955bad0d7fe38dcc02204d36d80d0019b3a71e646a08fa4a5607761d341ae8be371946ebe437c289c91501008576a91414011f7254d96b819c76986c277d115efce6f7b58763ac67210394854aa6eab5b2a8122cc726e9dded053a2184d88256816826d6231c068d4a5b7c820120876475527c21030d417a46946384f88d5f3337267c5e579765875dc4daca813e21734b140639e752ae67a9148a486ff2e31d6158bf39e2608864d63fefd09d5b88ac6868f7010000");
2391 test_htlc_output!(2,
2392 "3045022100a12a9a473ece548584aabdd051779025a5ed4077c4b7aa376ec7a0b1645e5a48022039490b333f53b5b3e2ddde1d809e492cba2b3e5fc3a436cd3ffb4cd3d500fa5a",
2393 "3045022100ff200bc934ab26ce9a559e998ceb0aee53bc40368e114ab9d3054d9960546e2802202496856ca163ac12c143110b6b3ac9d598df7254f2e17b3b94c3ab5301f4c3b0",
2394 "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");
2398 // commitment tx with four outputs untrimmed (minimum feerate)
2399 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
2400 chan.feerate_per_kw = 2195;
2402 test_commitment!("304402205e2f76d4657fb732c0dfc820a18a7301e368f5799e06b7828007633741bda6df0220458009ae59d0c6246065c419359e05eb2a4b4ef4a1b310cc912db44eb7924298",
2403 "304402203b12d44254244b8ff3bb4129b0920fd45120ab42f553d9976394b099d500c99e02205e95bb7a3164852ef0c48f9e0eaf145218f8e2c41251b231f03cbdc4f29a5429",
2404 "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");
2406 assert_eq!(unsigned_tx.1.len(), 2);
2408 test_htlc_output!(0,
2409 "3045022100a8a78fa1016a5c5c3704f2e8908715a3cef66723fb95f3132ec4d2d05cd84fb4022025ac49287b0861ec21932405f5600cbce94313dbde0e6c5d5af1b3366d8afbfc",
2410 "3045022100be6ae1977fd7b630a53623f3f25c542317ccfc2b971782802a4f1ef538eb22b402207edc4d0408f8f38fd3c7365d1cfc26511b7cd2d4fecd8b005fba3cd5bc704390",
2411 "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");
2413 test_htlc_output!(1,
2414 "3045022100e769cb156aa2f7515d126cef7a69968629620ce82afcaa9e210969de6850df4602200b16b3f3486a229a48aadde520dbee31ae340dbadaffae74fbb56681fef27b92",
2415 "30440220665b9cb4a978c09d1ca8977a534999bc8a49da624d0c5439451dd69cde1a003d022070eae0620f01f3c1bd029cc1488da13fb40fdab76f396ccd335479a11c5276d8",
2416 "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");
2420 // commitment tx with four outputs untrimmed (maximum feerate)
2421 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
2422 chan.feerate_per_kw = 3702;
2424 test_commitment!("3045022100c1a3b0b60ca092ed5080121f26a74a20cec6bdee3f8e47bae973fcdceb3eda5502207d467a9873c939bf3aa758014ae67295fedbca52412633f7e5b2670fc7c381c1",
2425 "304402200e930a43c7951162dc15a2b7344f48091c74c70f7024e7116e900d8bcfba861c022066fa6cbda3929e21daa2e7e16a4b948db7e8919ef978402360d1095ffdaff7b0",
2426 "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");
2428 assert_eq!(unsigned_tx.1.len(), 2);
2430 test_htlc_output!(0,
2431 "3045022100dfb73b4fe961b31a859b2bb1f4f15cabab9265016dd0272323dc6a9e85885c54022059a7b87c02861ee70662907f25ce11597d7b68d3399443a831ae40e777b76bdb",
2432 "304402202765b9c9ece4f127fa5407faf66da4c5ce2719cdbe47cd3175fc7d48b482e43d02205605125925e07bad1e41c618a4b434d72c88a164981c4b8af5eaf4ee9142ec3a",
2433 "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");
2435 test_htlc_output!(1,
2436 "3045022100ea9dc2a7c3c3640334dab733bb4e036e32a3106dc707b24227874fa4f7da746802204d672f7ac0fe765931a8df10b81e53a3242dd32bd9dc9331eb4a596da87954e9",
2437 "30440220048a41c660c4841693de037d00a407810389f4574b3286afb7bc392a438fa3f802200401d71fa87c64fe621b49ac07e3bf85157ac680acb977124da28652cc7f1a5c",
2438 "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");
2442 // commitment tx with three outputs untrimmed (minimum feerate)
2443 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
2444 chan.feerate_per_kw = 3703;
2446 test_commitment!("30450221008b7c191dd46893b67b628e618d2dc8e81169d38bade310181ab77d7c94c6675e02203b4dd131fd7c9deb299560983dcdc485545c98f989f7ae8180c28289f9e6bdb0",
2447 "3044022047305531dd44391dce03ae20f8735005c615eb077a974edb0059ea1a311857d602202e0ed6972fbdd1e8cb542b06e0929bc41b2ddf236e04cb75edd56151f4197506",
2448 "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");
2450 assert_eq!(unsigned_tx.1.len(), 1);
2452 test_htlc_output!(0,
2453 "3044022044f65cf833afdcb9d18795ca93f7230005777662539815b8a601eeb3e57129a902206a4bf3e53392affbba52640627defa8dc8af61c958c9e827b2798ab45828abdd",
2454 "3045022100b94d931a811b32eeb885c28ddcf999ae1981893b21dd1329929543fe87ce793002206370107fdd151c5f2384f9ceb71b3107c69c74c8ed5a28a94a4ab2d27d3b0724",
2455 "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");
2459 // commitment tx with three outputs untrimmed (maximum feerate)
2460 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
2461 chan.feerate_per_kw = 4914;
2463 test_commitment!("304402206d6cb93969d39177a09d5d45b583f34966195b77c7e585cf47ac5cce0c90cefb022031d71ae4e33a4e80df7f981d696fbdee517337806a3c7138b7491e2cbb077a0e",
2464 "304402206a2679efa3c7aaffd2a447fd0df7aba8792858b589750f6a1203f9259173198a022008d52a0e77a99ab533c36206cb15ad7aeb2aa72b93d4b571e728cb5ec2f6fe26",
2465 "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");
2467 assert_eq!(unsigned_tx.1.len(), 1);
2469 test_htlc_output!(0,
2470 "3045022100fcb38506bfa11c02874092a843d0cc0a8613c23b639832564a5f69020cb0f6ba02206508b9e91eaa001425c190c68ee5f887e1ad5b1b314002e74db9dbd9e42dbecf",
2471 "304502210086e76b460ddd3cea10525fba298405d3fe11383e56966a5091811368362f689a02200f72ee75657915e0ede89c28709acd113ede9e1b7be520e3bc5cda425ecd6e68",
2472 "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");
2476 // commitment tx with two outputs untrimmed (minimum feerate)
2477 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
2478 chan.feerate_per_kw = 4915;
2480 test_commitment!("304402200769ba89c7330dfa4feba447b6e322305f12ac7dac70ec6ba997ed7c1b598d0802204fe8d337e7fee781f9b7b1a06e580b22f4f79d740059560191d7db53f8765552",
2481 "3045022100a012691ba6cea2f73fa8bac37750477e66363c6d28813b0bb6da77c8eb3fb0270220365e99c51304b0b1a6ab9ea1c8500db186693e39ec1ad5743ee231b0138384b9",
2482 "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");
2484 assert_eq!(unsigned_tx.1.len(), 0);
2488 // commitment tx with two outputs untrimmed (maximum feerate)
2489 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
2490 chan.feerate_per_kw = 9651180;
2492 test_commitment!("3044022037f83ff00c8e5fb18ae1f918ffc24e54581775a20ff1ae719297ef066c71caa9022039c529cccd89ff6c5ed1db799614533844bd6d101da503761c45c713996e3bbd",
2493 "30440220514f977bf7edc442de8ce43ace9686e5ebdc0f893033f13e40fb46c8b8c6e1f90220188006227d175f5c35da0b092c57bea82537aed89f7778204dc5bacf4f29f2b9",
2494 "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");
2496 assert_eq!(unsigned_tx.1.len(), 0);
2500 // commitment tx with one output untrimmed (minimum feerate)
2501 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
2502 chan.feerate_per_kw = 9651181;
2504 test_commitment!("3044022064901950be922e62cbe3f2ab93de2b99f37cff9fc473e73e394b27f88ef0731d02206d1dfa227527b4df44a07599289e207d6fd9cca60c0365682dcd3deaf739567e",
2505 "3044022031a82b51bd014915fe68928d1abf4b9885353fb896cac10c3fdd88d7f9c7f2e00220716bda819641d2c63e65d3549b6120112e1aeaf1742eed94a471488e79e206b1",
2506 "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");
2508 assert_eq!(unsigned_tx.1.len(), 0);
2512 // commitment tx with fee greater than funder amount
2513 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
2514 chan.feerate_per_kw = 9651936;
2516 test_commitment!("3044022064901950be922e62cbe3f2ab93de2b99f37cff9fc473e73e394b27f88ef0731d02206d1dfa227527b4df44a07599289e207d6fd9cca60c0365682dcd3deaf739567e",
2517 "3044022031a82b51bd014915fe68928d1abf4b9885353fb896cac10c3fdd88d7f9c7f2e00220716bda819641d2c63e65d3549b6120112e1aeaf1742eed94a471488e79e206b1",
2518 "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");
2520 assert_eq!(unsigned_tx.1.len(), 0);
2525 fn test_per_commitment_secret_gen() {
2526 // Test vectors from BOLT 3 Appendix D:
2528 let mut seed = [0; 32];
2529 seed[0..32].clone_from_slice(&hex_bytes("0000000000000000000000000000000000000000000000000000000000000000").unwrap());
2530 assert_eq!(chan_utils::build_commitment_secret(seed, 281474976710655),
2531 hex_bytes("02a40c85b6f28da08dfdbe0926c53fab2de6d28c10301f8f7c4073d5e42e3148").unwrap()[..]);
2533 seed[0..32].clone_from_slice(&hex_bytes("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF").unwrap());
2534 assert_eq!(chan_utils::build_commitment_secret(seed, 281474976710655),
2535 hex_bytes("7cc854b54e3e0dcdb010d7a3fee464a9687be6e8db3be6854c475621e007a5dc").unwrap()[..]);
2537 assert_eq!(chan_utils::build_commitment_secret(seed, 0xaaaaaaaaaaa),
2538 hex_bytes("56f4008fb007ca9acf0e15b054d5c9fd12ee06cea347914ddbaed70d1c13a528").unwrap()[..]);
2540 assert_eq!(chan_utils::build_commitment_secret(seed, 0x555555555555),
2541 hex_bytes("9015daaeb06dba4ccc05b91b2f73bd54405f2be9f217fbacd3c5ac2e62327d31").unwrap()[..]);
2543 seed[0..32].clone_from_slice(&hex_bytes("0101010101010101010101010101010101010101010101010101010101010101").unwrap());
2544 assert_eq!(chan_utils::build_commitment_secret(seed, 1),
2545 hex_bytes("915c75942a26bb3a433a8ce2cb0427c29ec6c1775cfc78328b57f6ba7bfeaa9c").unwrap()[..]);
2549 fn test_key_derivation() {
2550 // Test vectors from BOLT 3 Appendix E:
2551 let secp_ctx = Secp256k1::new();
2553 let base_secret = SecretKey::from_slice(&secp_ctx, &hex_bytes("000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f").unwrap()[..]).unwrap();
2554 let per_commitment_secret = SecretKey::from_slice(&secp_ctx, &hex_bytes("1f1e1d1c1b1a191817161514131211100f0e0d0c0b0a09080706050403020100").unwrap()[..]).unwrap();
2556 let base_point = PublicKey::from_secret_key(&secp_ctx, &base_secret).unwrap();
2557 assert_eq!(base_point.serialize()[..], hex_bytes("036d6caac248af96f6afa7f904f550253a0f3ef3f5aa2fe6838a95b216691468e2").unwrap()[..]);
2559 let per_commitment_point = PublicKey::from_secret_key(&secp_ctx, &per_commitment_secret).unwrap();
2560 assert_eq!(per_commitment_point.serialize()[..], hex_bytes("025f7117a78150fe2ef97db7cfc83bd57b2e2c0d0dd25eaf467a4a1c2a45ce1486").unwrap()[..]);
2562 assert_eq!(chan_utils::derive_public_key(&secp_ctx, &per_commitment_point, &base_point).unwrap().serialize()[..],
2563 hex_bytes("0235f2dbfaa89b57ec7b055afe29849ef7ddfeb1cefdb9ebdc43f5494984db29e5").unwrap()[..]);
2565 assert_eq!(chan_utils::derive_private_key(&secp_ctx, &per_commitment_point, &base_secret).unwrap(),
2566 SecretKey::from_slice(&secp_ctx, &hex_bytes("cbced912d3b21bf196a766651e436aff192362621ce317704ea2f75d87e7be0f").unwrap()[..]).unwrap());
2568 assert_eq!(chan_utils::derive_public_revocation_key(&secp_ctx, &per_commitment_point, &base_point).unwrap().serialize()[..],
2569 hex_bytes("02916e326636d19c33f13e8c0c3a03dd157f332f3e99c317c141dd865eb01f8ff0").unwrap()[..]);
2571 assert_eq!(chan_utils::derive_private_revocation_key(&secp_ctx, &per_commitment_secret, &base_secret).unwrap(),
2572 SecretKey::from_slice(&secp_ctx, &hex_bytes("d09ffff62ddb2297ab000cc85bcb4283fdeb6aa052affbc9dddcf33b61078110").unwrap()[..]).unwrap());