1 use bitcoin::blockdata::block::BlockHeader;
2 use bitcoin::blockdata::script::{Script,Builder};
3 use bitcoin::blockdata::transaction::{TxIn, TxOut, Transaction, SigHashType};
4 use bitcoin::blockdata::opcodes;
5 use bitcoin::util::hash::{Sha256dHash, Hash160};
6 use bitcoin::util::bip143;
7 use bitcoin::network::serialize::BitcoinHash;
9 use secp256k1::key::{PublicKey,SecretKey};
10 use secp256k1::{Secp256k1,Message,Signature};
13 use crypto::digest::Digest;
14 use crypto::hkdf::{hkdf_extract,hkdf_expand};
17 use ln::msgs::{ErrorAction, HandleError};
18 use ln::channelmonitor::ChannelMonitor;
19 use ln::channelmanager::{PendingHTLCStatus, HTLCSource, PendingForwardHTLCInfo, HTLCFailReason, HTLCFailureMsg};
20 use ln::chan_utils::{TxCreationKeys,HTLCOutputInCommitment,HTLC_SUCCESS_TX_WEIGHT,HTLC_TIMEOUT_TX_WEIGHT};
22 use chain::chaininterface::{FeeEstimator,ConfirmationTarget};
23 use chain::transaction::OutPoint;
24 use util::{transaction_utils,rng};
25 use util::ser::Writeable;
26 use util::sha2::Sha256;
27 use util::logger::Logger;
28 use util::errors::APIError;
31 use std::default::Default;
33 use std::time::Instant;
36 pub struct ChannelKeys {
37 pub funding_key: SecretKey,
38 pub revocation_base_key: SecretKey,
39 pub payment_base_key: SecretKey,
40 pub delayed_payment_base_key: SecretKey,
41 pub htlc_base_key: SecretKey,
42 pub channel_close_key: SecretKey,
43 pub channel_monitor_claim_key: SecretKey,
44 pub commitment_seed: [u8; 32],
48 pub struct ChannelValueStat {
49 pub value_to_self_msat: u64,
50 pub channel_value_msat: u64,
51 pub channel_reserve_msat: u64,
52 pub pending_outbound_htlcs_amount_msat: u64,
53 pub pending_inbound_htlcs_amount_msat: u64,
54 pub holding_cell_outbound_amount_msat: u64,
55 pub their_max_htlc_value_in_flight_msat: u64, // outgoing
59 pub fn new_from_seed(seed: &[u8; 32]) -> Result<ChannelKeys, secp256k1::Error> {
60 let mut prk = [0; 32];
61 hkdf_extract(Sha256::new(), b"rust-lightning key gen salt", seed, &mut prk);
62 let secp_ctx = Secp256k1::without_caps();
64 let mut okm = [0; 32];
65 hkdf_expand(Sha256::new(), &prk, b"rust-lightning funding key info", &mut okm);
66 let funding_key = SecretKey::from_slice(&secp_ctx, &okm)?;
68 hkdf_expand(Sha256::new(), &prk, b"rust-lightning revocation base key info", &mut okm);
69 let revocation_base_key = SecretKey::from_slice(&secp_ctx, &okm)?;
71 hkdf_expand(Sha256::new(), &prk, b"rust-lightning payment base key info", &mut okm);
72 let payment_base_key = SecretKey::from_slice(&secp_ctx, &okm)?;
74 hkdf_expand(Sha256::new(), &prk, b"rust-lightning delayed payment base key info", &mut okm);
75 let delayed_payment_base_key = SecretKey::from_slice(&secp_ctx, &okm)?;
77 hkdf_expand(Sha256::new(), &prk, b"rust-lightning htlc base key info", &mut okm);
78 let htlc_base_key = SecretKey::from_slice(&secp_ctx, &okm)?;
80 hkdf_expand(Sha256::new(), &prk, b"rust-lightning channel close key info", &mut okm);
81 let channel_close_key = SecretKey::from_slice(&secp_ctx, &okm)?;
83 hkdf_expand(Sha256::new(), &prk, b"rust-lightning channel monitor claim key info", &mut okm);
84 let channel_monitor_claim_key = SecretKey::from_slice(&secp_ctx, &okm)?;
86 hkdf_expand(Sha256::new(), &prk, b"rust-lightning local commitment seed info", &mut okm);
89 funding_key: funding_key,
90 revocation_base_key: revocation_base_key,
91 payment_base_key: payment_base_key,
92 delayed_payment_base_key: delayed_payment_base_key,
93 htlc_base_key: htlc_base_key,
94 channel_close_key: channel_close_key,
95 channel_monitor_claim_key: channel_monitor_claim_key,
101 enum InboundHTLCRemovalReason {
102 FailRelay(msgs::OnionErrorPacket),
103 FailMalformed(([u8; 32], u16)),
107 enum InboundHTLCState {
108 /// Added by remote, to be included in next local commitment tx.
109 RemoteAnnounced(PendingHTLCStatus),
110 /// Included in a received commitment_signed message (implying we've revoke_and_ack'ed it), but
111 /// the remote side hasn't yet revoked their previous state, which we need them to do before we
112 /// accept this HTLC. Implies AwaitingRemoteRevoke.
113 /// We also have not yet included this HTLC in a commitment_signed message, and are waiting on
114 /// a remote revoke_and_ack on a previous state before we can do so.
115 AwaitingRemoteRevokeToAnnounce(PendingHTLCStatus),
116 /// Included in a received commitment_signed message (implying we've revoke_and_ack'ed it), but
117 /// the remote side hasn't yet revoked their previous state, which we need them to do before we
118 /// accept this HTLC. Implies AwaitingRemoteRevoke.
119 /// We have included this HTLC in our latest commitment_signed and are now just waiting on a
121 AwaitingAnnouncedRemoteRevoke(PendingHTLCStatus),
123 /// Removed by us and a new commitment_signed was sent (if we were AwaitingRemoteRevoke when we
124 /// created it we would have put it in the holding cell instead). When they next revoke_and_ack
126 /// Note that we have to keep an eye on the HTLC until we've received a broadcastable
127 /// commitment transaction without it as otherwise we'll have to force-close the channel to
128 /// claim it before the timeout (obviously doesn't apply to revoked HTLCs that we can't claim
129 /// anyway). That said, ChannelMonitor does this for us (see
130 /// ChannelMonitor::would_broadcast_at_height) so we actually remove the HTLC from our own
131 /// local state before then, once we're sure that the next commitment_signed and
132 /// ChannelMonitor::provide_latest_local_commitment_tx_info will not include this HTLC.
133 LocalRemoved(InboundHTLCRemovalReason),
136 struct InboundHTLCOutput {
140 payment_hash: [u8; 32],
141 state: InboundHTLCState,
144 enum OutboundHTLCState {
145 /// Added by us and included in a commitment_signed (if we were AwaitingRemoteRevoke when we
146 /// created it we would have put it in the holding cell instead). When they next revoke_and_ack
147 /// we will promote to Committed (note that they may not accept it until the next time we
148 /// revoke, but we dont really care about that:
149 /// * they've revoked, so worst case we can announce an old state and get our (option on)
150 /// money back (though we wont), and,
151 /// * we'll send them a revoke when they send a commitment_signed, and since only they're
152 /// allowed to remove it, the "can only be removed once committed on both sides" requirement
153 /// doesn't matter to us and its up to them to enforce it, worst-case they jump ahead but
154 /// we'll never get out of sync).
155 /// Note that we Box the OnionPacket as its rather large and we don't want to blow up
156 /// OutboundHTLCOutput's size just for a temporary bit
157 LocalAnnounced(Box<msgs::OnionPacket>),
159 /// Remote removed this (outbound) HTLC. We're waiting on their commitment_signed to finalize
160 /// the change (though they'll need to revoke before we fail the payment).
162 /// Remote removed this and sent a commitment_signed (implying we've revoke_and_ack'ed it), but
163 /// the remote side hasn't yet revoked their previous state, which we need them to do before we
164 /// can do any backwards failing. Implies AwaitingRemoteRevoke.
165 /// We also have not yet removed this HTLC in a commitment_signed message, and are waiting on a
166 /// remote revoke_and_ack on a previous state before we can do so.
167 AwaitingRemoteRevokeToRemove,
168 /// Remote removed this and sent a commitment_signed (implying we've revoke_and_ack'ed it), but
169 /// the remote side hasn't yet revoked their previous state, which we need them to do before we
170 /// can do any backwards failing. Implies AwaitingRemoteRevoke.
171 /// We have removed this HTLC in our latest commitment_signed and are now just waiting on a
172 /// revoke_and_ack to drop completely.
173 AwaitingRemovedRemoteRevoke,
176 struct OutboundHTLCOutput {
180 payment_hash: [u8; 32],
181 state: OutboundHTLCState,
183 /// If we're in a removed state, set if they failed, otherwise None
184 fail_reason: Option<HTLCFailReason>,
187 macro_rules! get_htlc_in_commitment {
188 ($htlc: expr, $offered: expr) => {
189 HTLCOutputInCommitment {
191 amount_msat: $htlc.amount_msat,
192 cltv_expiry: $htlc.cltv_expiry,
193 payment_hash: $htlc.payment_hash,
194 transaction_output_index: 0
199 /// See AwaitingRemoteRevoke ChannelState for more info
200 enum HTLCUpdateAwaitingACK {
205 payment_hash: [u8; 32],
207 onion_routing_packet: msgs::OnionPacket,
208 time_created: Instant, //TODO: Some kind of timeout thing-a-majig
211 payment_preimage: [u8; 32],
216 err_packet: msgs::OnionErrorPacket,
220 /// There are a few "states" and then a number of flags which can be applied:
221 /// We first move through init with OurInitSent -> TheirInitSent -> FundingCreated -> FundingSent.
222 /// TheirFundingLocked and OurFundingLocked then get set on FundingSent, and when both are set we
223 /// move on to ChannelFunded.
224 /// Note that PeerDisconnected can be set on both ChannelFunded and FundingSent.
225 /// ChannelFunded can then get all remaining flags set on it, until we finish shutdown, then we
226 /// move on to ShutdownComplete, at which point most calls into this channel are disallowed.
228 /// Implies we have (or are prepared to) send our open_channel/accept_channel message
229 OurInitSent = (1 << 0),
230 /// Implies we have received their open_channel/accept_channel message
231 TheirInitSent = (1 << 1),
232 /// We have sent funding_created and are awaiting a funding_signed to advance to FundingSent.
233 /// Note that this is nonsense for an inbound channel as we immediately generate funding_signed
234 /// upon receipt of funding_created, so simply skip this state.
236 /// Set when we have received/sent funding_created and funding_signed and are thus now waiting
237 /// on the funding transaction to confirm. The FundingLocked flags are set to indicate when we
238 /// and our counterparty consider the funding transaction confirmed.
240 /// Flag which can be set on FundingSent to indicate they sent us a funding_locked message.
241 /// Once both TheirFundingLocked and OurFundingLocked are set, state moves on to ChannelFunded.
242 TheirFundingLocked = (1 << 4),
243 /// Flag which can be set on FundingSent to indicate we sent them a funding_locked message.
244 /// Once both TheirFundingLocked and OurFundingLocked are set, state moves on to ChannelFunded.
245 OurFundingLocked = (1 << 5),
247 /// Flag which is set on ChannelFunded and FundingSent indicating remote side is considered
248 /// "disconnected" and no updates are allowed until after we've done a channel_reestablish
250 PeerDisconnected = (1 << 7),
251 /// Flag which implies that we have sent a commitment_signed but are awaiting the responding
252 /// revoke_and_ack message. During this time period, we can't generate new commitment_signed
253 /// messages as then we will be unable to determine which HTLCs they included in their
254 /// revoke_and_ack implicit ACK, so instead we have to hold them away temporarily to be sent
256 /// Flag is set on ChannelFunded.
257 AwaitingRemoteRevoke = (1 << 8),
258 /// Flag which is set on ChannelFunded or FundingSent after receiving a shutdown message from
259 /// the remote end. If set, they may not add any new HTLCs to the channel, and we are expected
260 /// to respond with our own shutdown message when possible.
261 RemoteShutdownSent = (1 << 9),
262 /// Flag which is set on ChannelFunded or FundingSent after sending a shutdown message. At this
263 /// point, we may not add any new HTLCs to the channel.
264 /// TODO: Investigate some kind of timeout mechanism by which point the remote end must provide
265 /// us their shutdown.
266 LocalShutdownSent = (1 << 10),
267 /// We've successfully negotiated a closing_signed dance. At this point ChannelManager is about
268 /// to drop us, but we store this anyway.
269 ShutdownComplete = 2048,
271 const BOTH_SIDES_SHUTDOWN_MASK: u32 = (ChannelState::LocalShutdownSent as u32 | ChannelState::RemoteShutdownSent as u32);
273 const INITIAL_COMMITMENT_NUMBER: u64 = (1 << 48) - 1;
275 // TODO: We should refactor this to be an Inbound/OutboundChannel until initial setup handshaking
276 // has been completed, and then turn into a Channel to get compiler-time enforcement of things like
277 // calling channel_id() before we're set up or things like get_outbound_funding_signed on an
279 pub(super) struct Channel {
282 channel_id: [u8; 32],
284 channel_outbound: bool,
285 secp_ctx: Secp256k1<secp256k1::All>,
286 announce_publicly: bool,
287 channel_value_satoshis: u64,
289 local_keys: ChannelKeys,
291 // Our commitment numbers start at 2^48-1 and count down, whereas the ones used in transaction
292 // generation start at 0 and count up...this simplifies some parts of implementation at the
293 // cost of others, but should really just be changed.
295 cur_local_commitment_transaction_number: u64,
296 cur_remote_commitment_transaction_number: u64,
297 value_to_self_msat: u64, // Excluding all pending_htlcs, excluding fees
298 pending_inbound_htlcs: Vec<InboundHTLCOutput>,
299 pending_outbound_htlcs: Vec<OutboundHTLCOutput>,
300 holding_cell_htlc_updates: Vec<HTLCUpdateAwaitingACK>,
302 // pending_update_fee is filled when sending and receiving update_fee
303 // For outbound channel, feerate_per_kw is updated with the value from
304 // pending_update_fee when revoke_and_ack is received
306 // For inbound channel, feerate_per_kw is updated when it receives
307 // commitment_signed and revoke_and_ack is generated
308 // The pending value is kept when another pair of update_fee and commitment_signed
309 // is received during AwaitingRemoteRevoke and relieved when the expected
310 // revoke_and_ack is received and new commitment_signed is generated to be
311 // sent to the funder. Otherwise, the pending value is removed when receiving
312 // commitment_signed.
313 pending_update_fee: Option<u64>,
314 // update_fee() during ChannelState::AwaitingRemoteRevoke is hold in
315 // holdina_cell_update_fee then moved to pending_udpate_fee when revoke_and_ack
316 // is received. holding_cell_update_fee is updated when there are additional
317 // update_fee() during ChannelState::AwaitingRemoteRevoke.
318 holding_cell_update_fee: Option<u64>,
319 next_local_htlc_id: u64,
320 next_remote_htlc_id: u64,
321 channel_update_count: u32,
324 #[cfg(debug_assertions)]
325 /// Max to_local and to_remote outputs in a locally-generated commitment transaction
326 max_commitment_tx_output_local: ::std::sync::Mutex<(u64, u64)>,
327 #[cfg(debug_assertions)]
328 /// Max to_local and to_remote outputs in a remote-generated commitment transaction
329 max_commitment_tx_output_remote: ::std::sync::Mutex<(u64, u64)>,
332 // Used in ChannelManager's tests to send a revoked transaction
333 pub last_local_commitment_txn: Vec<Transaction>,
335 last_local_commitment_txn: Vec<Transaction>,
337 last_sent_closing_fee: Option<(u64, u64)>, // (feerate, fee)
339 /// The hash of the block in which the funding transaction reached our CONF_TARGET. We use this
340 /// to detect unconfirmation after a serialize-unserialize roudtrip where we may not see a full
341 /// series of block_connected/block_disconnected calls. Obviously this is not a guarantee as we
342 /// could miss the funding_tx_confirmed_in block as well, but it serves as a useful fallback.
343 funding_tx_confirmed_in: Option<Sha256dHash>,
344 short_channel_id: Option<u64>,
345 /// Used to deduplicate block_connected callbacks
346 last_block_connected: Sha256dHash,
347 funding_tx_confirmations: u64,
349 their_dust_limit_satoshis: u64,
350 our_dust_limit_satoshis: u64,
351 their_max_htlc_value_in_flight_msat: u64,
352 //get_our_max_htlc_value_in_flight_msat(): u64,
353 /// minimum channel reserve for **self** to maintain - set by them.
354 their_channel_reserve_satoshis: u64,
355 //get_our_channel_reserve_satoshis(): u64,
356 their_htlc_minimum_msat: u64,
357 our_htlc_minimum_msat: u64,
358 their_to_self_delay: u16,
359 //implied by BREAKDOWN_TIMEOUT: our_to_self_delay: u16,
360 their_max_accepted_htlcs: u16,
361 //implied by OUR_MAX_HTLCS: our_max_accepted_htlcs: u16,
363 their_funding_pubkey: Option<PublicKey>,
364 their_revocation_basepoint: Option<PublicKey>,
365 their_payment_basepoint: Option<PublicKey>,
366 their_delayed_payment_basepoint: Option<PublicKey>,
367 their_htlc_basepoint: Option<PublicKey>,
368 their_cur_commitment_point: Option<PublicKey>,
370 their_prev_commitment_point: Option<PublicKey>,
371 their_node_id: PublicKey,
373 their_shutdown_scriptpubkey: Option<Script>,
375 channel_monitor: ChannelMonitor,
380 const OUR_MAX_HTLCS: u16 = 5; //TODO
381 /// Confirmation count threshold at which we close a channel. Ideally we'd keep the channel around
382 /// on ice until the funding transaction gets more confirmations, but the LN protocol doesn't
383 /// really allow for this, so instead we're stuck closing it out at that point.
384 const UNCONF_THRESHOLD: u32 = 6;
385 /// The amount of time we require our counterparty wait to claim their money (ie time between when
386 /// we, or our watchtower, must check for them having broadcast a theft transaction).
387 const BREAKDOWN_TIMEOUT: u16 = 6 * 24 * 7; //TODO?
388 /// The amount of time we're willing to wait to claim money back to us
389 const MAX_LOCAL_BREAKDOWN_TIMEOUT: u16 = 6 * 24 * 14;
390 const COMMITMENT_TX_BASE_WEIGHT: u64 = 724;
391 const COMMITMENT_TX_WEIGHT_PER_HTLC: u64 = 172;
392 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
393 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?)
394 /// Maximmum `funding_satoshis` value, according to the BOLT #2 specification
396 pub const MAX_FUNDING_SATOSHIS: u64 = (1 << 24);
398 /// Used to return a simple Error back to ChannelManager. Will get converted to a
399 /// msgs::ErrorAction::SendErrorMessage or msgs::ErrorAction::IgnoreError as appropriate with our
400 /// channel_id in ChannelManager.
401 pub(super) enum ChannelError {
402 Ignore(&'static str),
406 macro_rules! secp_call {
407 ( $res: expr, $err: expr, $chan_id: expr ) => {
410 Err(_) => return Err(HandleError {err: $err, action: Some(msgs::ErrorAction::SendErrorMessage {msg: msgs::ErrorMessage {channel_id: $chan_id, data: $err.to_string()}})})
415 macro_rules! secp_derived_key {
416 ( $res: expr, $chan_id: expr ) => {
417 secp_call!($res, "Derived invalid key, peer is maliciously selecting parameters", $chan_id)
421 // Convert constants + channel value to limits:
422 fn get_our_max_htlc_value_in_flight_msat(channel_value_satoshis: u64) -> u64 {
423 channel_value_satoshis * 1000 / 10 //TODO
426 /// Returns a minimum channel reserve value **they** need to maintain
428 /// Guaranteed to return a value no larger than channel_value_satoshis
429 fn get_our_channel_reserve_satoshis(channel_value_satoshis: u64) -> u64 {
430 let (q, _) = channel_value_satoshis.overflowing_div(100);
431 cmp::min(channel_value_satoshis, cmp::max(q, 1000)) //TODO
434 fn derive_our_dust_limit_satoshis(at_open_background_feerate: u64) -> u64 {
435 at_open_background_feerate * B_OUTPUT_PLUS_SPENDING_INPUT_WEIGHT / 1000 //TODO
438 fn derive_our_htlc_minimum_msat(_at_open_channel_feerate_per_kw: u64) -> u64 {
442 fn derive_minimum_depth(_channel_value_satoshis_msat: u64, _value_to_self_msat: u64) -> u32 {
443 // Note that in order to comply with BOLT 7 announcement_signatures requirements this must
445 const CONF_TARGET: u32 = 12; //TODO: Should be much higher
449 fn derive_maximum_minimum_depth(_channel_value_satoshis_msat: u64, _value_to_self_msat: u64) -> u32 {
450 const CONF_TARGET: u32 = 12; //TODO: Should be much higher
455 pub fn new_outbound(fee_estimator: &FeeEstimator, chan_keys: ChannelKeys, their_node_id: PublicKey, channel_value_satoshis: u64, push_msat: u64, announce_publicly: bool, user_id: u64, logger: Arc<Logger>) -> Result<Channel, APIError> {
456 if channel_value_satoshis >= MAX_FUNDING_SATOSHIS {
457 return Err(APIError::APIMisuseError{err: "funding value > 2^24"});
460 if push_msat > channel_value_satoshis * 1000 {
461 return Err(APIError::APIMisuseError{err: "push value > channel value"});
465 let background_feerate = fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Background);
466 if Channel::get_our_channel_reserve_satoshis(channel_value_satoshis) < Channel::derive_our_dust_limit_satoshis(background_feerate) {
467 return Err(APIError::FeeRateTooHigh{err: format!("Not enough reserve above dust limit can be found at current fee rate({})", background_feerate), feerate: background_feerate});
470 let feerate = fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Normal);
472 let secp_ctx = Secp256k1::new();
473 let our_channel_monitor_claim_key_hash = Hash160::from_data(&PublicKey::from_secret_key(&secp_ctx, &chan_keys.channel_monitor_claim_key).serialize());
474 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();
475 let channel_monitor = ChannelMonitor::new(&chan_keys.revocation_base_key,
476 &PublicKey::from_secret_key(&secp_ctx, &chan_keys.delayed_payment_base_key),
477 &chan_keys.htlc_base_key,
478 BREAKDOWN_TIMEOUT, our_channel_monitor_claim_script);
483 channel_id: rng::rand_u832(),
484 channel_state: ChannelState::OurInitSent as u32,
485 channel_outbound: true,
487 announce_publicly: announce_publicly,
488 channel_value_satoshis: channel_value_satoshis,
490 local_keys: chan_keys,
491 cur_local_commitment_transaction_number: INITIAL_COMMITMENT_NUMBER,
492 cur_remote_commitment_transaction_number: INITIAL_COMMITMENT_NUMBER,
493 value_to_self_msat: channel_value_satoshis * 1000 - push_msat,
494 pending_inbound_htlcs: Vec::new(),
495 pending_outbound_htlcs: Vec::new(),
496 holding_cell_htlc_updates: Vec::new(),
497 pending_update_fee: None,
498 holding_cell_update_fee: None,
499 next_local_htlc_id: 0,
500 next_remote_htlc_id: 0,
501 channel_update_count: 1,
503 #[cfg(debug_assertions)]
504 max_commitment_tx_output_local: ::std::sync::Mutex::new((channel_value_satoshis * 1000 - push_msat, push_msat)),
505 #[cfg(debug_assertions)]
506 max_commitment_tx_output_remote: ::std::sync::Mutex::new((channel_value_satoshis * 1000 - push_msat, push_msat)),
508 last_local_commitment_txn: Vec::new(),
510 last_sent_closing_fee: None,
512 funding_tx_confirmed_in: None,
513 short_channel_id: None,
514 last_block_connected: Default::default(),
515 funding_tx_confirmations: 0,
517 feerate_per_kw: feerate,
518 their_dust_limit_satoshis: 0,
519 our_dust_limit_satoshis: Channel::derive_our_dust_limit_satoshis(background_feerate),
520 their_max_htlc_value_in_flight_msat: 0,
521 their_channel_reserve_satoshis: 0,
522 their_htlc_minimum_msat: 0,
523 our_htlc_minimum_msat: Channel::derive_our_htlc_minimum_msat(feerate),
524 their_to_self_delay: 0,
525 their_max_accepted_htlcs: 0,
527 their_funding_pubkey: None,
528 their_revocation_basepoint: None,
529 their_payment_basepoint: None,
530 their_delayed_payment_basepoint: None,
531 their_htlc_basepoint: None,
532 their_cur_commitment_point: None,
534 their_prev_commitment_point: None,
535 their_node_id: their_node_id,
537 their_shutdown_scriptpubkey: None,
539 channel_monitor: channel_monitor,
545 fn check_remote_fee(fee_estimator: &FeeEstimator, feerate_per_kw: u32) -> Result<(), ChannelError> {
546 if (feerate_per_kw as u64) < fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Background) {
547 return Err(ChannelError::Close("Peer's feerate much too low"));
549 if (feerate_per_kw as u64) > fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::HighPriority) * 2 {
550 return Err(ChannelError::Close("Peer's feerate much too high"));
555 /// Creates a new channel from a remote sides' request for one.
556 /// Assumes chain_hash has already been checked and corresponds with what we expect!
557 pub fn new_from_req(fee_estimator: &FeeEstimator, chan_keys: ChannelKeys, their_node_id: PublicKey, msg: &msgs::OpenChannel, user_id: u64, require_announce: bool, allow_announce: bool, logger: Arc<Logger>) -> Result<Channel, ChannelError> {
558 // Check sanity of message fields:
559 if msg.funding_satoshis >= MAX_FUNDING_SATOSHIS {
560 return Err(ChannelError::Close("funding value > 2^24"));
562 if msg.channel_reserve_satoshis > msg.funding_satoshis {
563 return Err(ChannelError::Close("Bogus channel_reserve_satoshis"));
565 if msg.push_msat > (msg.funding_satoshis - msg.channel_reserve_satoshis) * 1000 {
566 return Err(ChannelError::Close("push_msat larger than funding value"));
568 if msg.dust_limit_satoshis > msg.funding_satoshis {
569 return Err(ChannelError::Close("Peer never wants payout outputs?"));
571 if msg.dust_limit_satoshis > msg.channel_reserve_satoshis {
572 return Err(ChannelError::Close("Bogus; channel reserve is less than dust limit"));
574 if msg.htlc_minimum_msat >= (msg.funding_satoshis - msg.channel_reserve_satoshis) * 1000 {
575 return Err(ChannelError::Close("Miminum htlc value is full channel value"));
577 Channel::check_remote_fee(fee_estimator, msg.feerate_per_kw)?;
579 if msg.to_self_delay > MAX_LOCAL_BREAKDOWN_TIMEOUT {
580 return Err(ChannelError::Close("They wanted our payments to be delayed by a needlessly long period"));
582 if msg.max_accepted_htlcs < 1 {
583 return Err(ChannelError::Close("0 max_accpted_htlcs makes for a useless channel"));
585 if msg.max_accepted_htlcs > 483 {
586 return Err(ChannelError::Close("max_accpted_htlcs > 483"));
589 // Convert things into internal flags and prep our state:
591 let their_announce = if (msg.channel_flags & 1) == 1 { true } else { false };
592 if require_announce && !their_announce {
593 return Err(ChannelError::Close("Peer tried to open unannounced channel, but we require public ones"));
595 if !allow_announce && their_announce {
596 return Err(ChannelError::Close("Peer tried to open announced channel, but we require private ones"));
599 let background_feerate = fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Background);
601 let our_dust_limit_satoshis = Channel::derive_our_dust_limit_satoshis(background_feerate);
602 let our_channel_reserve_satoshis = Channel::get_our_channel_reserve_satoshis(msg.funding_satoshis);
603 if our_channel_reserve_satoshis < our_dust_limit_satoshis {
604 return Err(ChannelError::Close("Suitalbe channel reserve not found. aborting"));
606 if msg.channel_reserve_satoshis < our_dust_limit_satoshis {
607 return Err(ChannelError::Close("channel_reserve_satoshis too small"));
609 if our_channel_reserve_satoshis < msg.dust_limit_satoshis {
610 return Err(ChannelError::Close("Dust limit too high for our channel reserve"));
613 // check if the funder's amount for the initial commitment tx is sufficient
614 // for full fee payment
615 let funders_amount_msat = msg.funding_satoshis * 1000 - msg.push_msat;
616 if funders_amount_msat < background_feerate * COMMITMENT_TX_BASE_WEIGHT {
617 return Err(ChannelError::Close("Insufficient funding amount for initial commitment"));
620 let to_local_msat = msg.push_msat;
621 let to_remote_msat = funders_amount_msat - background_feerate * COMMITMENT_TX_BASE_WEIGHT;
622 if to_local_msat <= msg.channel_reserve_satoshis * 1000 && to_remote_msat <= our_channel_reserve_satoshis * 1000 {
623 return Err(ChannelError::Close("Insufficient funding amount for initial commitment"));
626 let secp_ctx = Secp256k1::new();
627 let our_channel_monitor_claim_key_hash = Hash160::from_data(&PublicKey::from_secret_key(&secp_ctx, &chan_keys.channel_monitor_claim_key).serialize());
628 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();
629 let mut channel_monitor = ChannelMonitor::new(&chan_keys.revocation_base_key,
630 &PublicKey::from_secret_key(&secp_ctx, &chan_keys.delayed_payment_base_key),
631 &chan_keys.htlc_base_key,
632 BREAKDOWN_TIMEOUT, our_channel_monitor_claim_script);
633 channel_monitor.set_their_base_keys(&msg.htlc_basepoint, &msg.delayed_payment_basepoint);
634 channel_monitor.set_their_to_self_delay(msg.to_self_delay);
636 let mut chan = Channel {
639 channel_id: msg.temporary_channel_id,
640 channel_state: (ChannelState::OurInitSent as u32) | (ChannelState::TheirInitSent as u32),
641 channel_outbound: false,
643 announce_publicly: their_announce,
645 local_keys: chan_keys,
646 cur_local_commitment_transaction_number: INITIAL_COMMITMENT_NUMBER,
647 cur_remote_commitment_transaction_number: INITIAL_COMMITMENT_NUMBER,
648 value_to_self_msat: msg.push_msat,
649 pending_inbound_htlcs: Vec::new(),
650 pending_outbound_htlcs: Vec::new(),
651 holding_cell_htlc_updates: Vec::new(),
652 pending_update_fee: None,
653 holding_cell_update_fee: None,
654 next_local_htlc_id: 0,
655 next_remote_htlc_id: 0,
656 channel_update_count: 1,
658 #[cfg(debug_assertions)]
659 max_commitment_tx_output_local: ::std::sync::Mutex::new((msg.push_msat, msg.funding_satoshis * 1000 - msg.push_msat)),
660 #[cfg(debug_assertions)]
661 max_commitment_tx_output_remote: ::std::sync::Mutex::new((msg.push_msat, msg.funding_satoshis * 1000 - msg.push_msat)),
663 last_local_commitment_txn: Vec::new(),
665 last_sent_closing_fee: None,
667 funding_tx_confirmed_in: None,
668 short_channel_id: None,
669 last_block_connected: Default::default(),
670 funding_tx_confirmations: 0,
672 feerate_per_kw: msg.feerate_per_kw as u64,
673 channel_value_satoshis: msg.funding_satoshis,
674 their_dust_limit_satoshis: msg.dust_limit_satoshis,
675 our_dust_limit_satoshis: our_dust_limit_satoshis,
676 their_max_htlc_value_in_flight_msat: cmp::min(msg.max_htlc_value_in_flight_msat, msg.funding_satoshis * 1000),
677 their_channel_reserve_satoshis: msg.channel_reserve_satoshis,
678 their_htlc_minimum_msat: msg.htlc_minimum_msat,
679 our_htlc_minimum_msat: Channel::derive_our_htlc_minimum_msat(msg.feerate_per_kw as u64),
680 their_to_self_delay: msg.to_self_delay,
681 their_max_accepted_htlcs: msg.max_accepted_htlcs,
683 their_funding_pubkey: Some(msg.funding_pubkey),
684 their_revocation_basepoint: Some(msg.revocation_basepoint),
685 their_payment_basepoint: Some(msg.payment_basepoint),
686 their_delayed_payment_basepoint: Some(msg.delayed_payment_basepoint),
687 their_htlc_basepoint: Some(msg.htlc_basepoint),
688 their_cur_commitment_point: Some(msg.first_per_commitment_point),
690 their_prev_commitment_point: None,
691 their_node_id: their_node_id,
693 their_shutdown_scriptpubkey: None,
695 channel_monitor: channel_monitor,
700 let obscure_factor = chan.get_commitment_transaction_number_obscure_factor();
701 chan.channel_monitor.set_commitment_obscure_factor(obscure_factor);
706 // Utilities to derive keys:
708 fn build_local_commitment_secret(&self, idx: u64) -> SecretKey {
709 let res = chan_utils::build_commitment_secret(self.local_keys.commitment_seed, idx);
710 SecretKey::from_slice(&self.secp_ctx, &res).unwrap()
713 // Utilities to build transactions:
715 fn get_commitment_transaction_number_obscure_factor(&self) -> u64 {
716 let mut sha = Sha256::new();
717 let our_payment_basepoint = PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.payment_base_key);
719 if self.channel_outbound {
720 sha.input(&our_payment_basepoint.serialize());
721 sha.input(&self.their_payment_basepoint.unwrap().serialize());
723 sha.input(&self.their_payment_basepoint.unwrap().serialize());
724 sha.input(&our_payment_basepoint.serialize());
726 let mut res = [0; 32];
727 sha.result(&mut res);
729 ((res[26] as u64) << 5*8) |
730 ((res[27] as u64) << 4*8) |
731 ((res[28] as u64) << 3*8) |
732 ((res[29] as u64) << 2*8) |
733 ((res[30] as u64) << 1*8) |
734 ((res[31] as u64) << 0*8)
737 /// Transaction nomenclature is somewhat confusing here as there are many different cases - a
738 /// transaction is referred to as "a's transaction" implying that a will be able to broadcast
739 /// the transaction. Thus, b will generally be sending a signature over such a transaction to
740 /// a, and a can revoke the transaction by providing b the relevant per_commitment_secret. As
741 /// such, a transaction is generally the result of b increasing the amount paid to a (or adding
743 /// @local is used only to convert relevant internal structures which refer to remote vs local
744 /// to decide value of outputs and direction of HTLCs.
745 /// @generated_by_local is used to determine *which* HTLCs to include - noting that the HTLC
746 /// state may indicate that one peer has informed the other that they'd like to add an HTLC but
747 /// have not yet committed it. Such HTLCs will only be included in transactions which are being
748 /// generated by the peer which proposed adding the HTLCs, and thus we need to understand both
749 /// which peer generated this transaction and "to whom" this transaction flows.
751 fn build_commitment_transaction(&self, commitment_number: u64, keys: &TxCreationKeys, local: bool, generated_by_local: bool, feerate_per_kw: u64) -> (Transaction, Vec<HTLCOutputInCommitment>) {
752 let obscured_commitment_transaction_number = self.get_commitment_transaction_number_obscure_factor() ^ (INITIAL_COMMITMENT_NUMBER - commitment_number);
755 let mut ins: Vec<TxIn> = Vec::new();
757 previous_output: self.channel_monitor.get_funding_txo().unwrap().into_bitcoin_outpoint(),
758 script_sig: Script::new(),
759 sequence: ((0x80 as u32) << 8*3) | ((obscured_commitment_transaction_number >> 3*8) as u32),
765 let mut txouts: Vec<(TxOut, Option<HTLCOutputInCommitment>)> = Vec::with_capacity(self.pending_inbound_htlcs.len() + self.pending_outbound_htlcs.len() + 2);
767 let dust_limit_satoshis = if local { self.our_dust_limit_satoshis } else { self.their_dust_limit_satoshis };
768 let mut remote_htlc_total_msat = 0;
769 let mut local_htlc_total_msat = 0;
770 let mut value_to_self_msat_offset = 0;
772 macro_rules! add_htlc_output {
773 ($htlc: expr, $outbound: expr) => {
774 if $outbound == local { // "offered HTLC output"
775 if $htlc.amount_msat / 1000 >= dust_limit_satoshis + (feerate_per_kw * HTLC_TIMEOUT_TX_WEIGHT / 1000) {
776 let htlc_in_tx = get_htlc_in_commitment!($htlc, true);
778 script_pubkey: chan_utils::get_htlc_redeemscript(&htlc_in_tx, &keys).to_v0_p2wsh(),
779 value: $htlc.amount_msat / 1000
780 }, Some(htlc_in_tx)));
783 if $htlc.amount_msat / 1000 >= dust_limit_satoshis + (feerate_per_kw * HTLC_SUCCESS_TX_WEIGHT / 1000) {
784 let htlc_in_tx = get_htlc_in_commitment!($htlc, false);
785 txouts.push((TxOut { // "received HTLC output"
786 script_pubkey: chan_utils::get_htlc_redeemscript(&htlc_in_tx, &keys).to_v0_p2wsh(),
787 value: $htlc.amount_msat / 1000
788 }, Some(htlc_in_tx)));
794 for ref htlc in self.pending_inbound_htlcs.iter() {
795 let include = match htlc.state {
796 InboundHTLCState::RemoteAnnounced(_) => !generated_by_local,
797 InboundHTLCState::AwaitingRemoteRevokeToAnnounce(_) => !generated_by_local,
798 InboundHTLCState::AwaitingAnnouncedRemoteRevoke(_) => true,
799 InboundHTLCState::Committed => true,
800 InboundHTLCState::LocalRemoved(_) => !generated_by_local,
804 add_htlc_output!(htlc, false);
805 remote_htlc_total_msat += htlc.amount_msat;
808 &InboundHTLCState::LocalRemoved(ref reason) => {
809 if generated_by_local {
810 if let &InboundHTLCRemovalReason::Fulfill(_) = reason {
811 value_to_self_msat_offset += htlc.amount_msat as i64;
820 for ref htlc in self.pending_outbound_htlcs.iter() {
821 let include = match htlc.state {
822 OutboundHTLCState::LocalAnnounced(_) => generated_by_local,
823 OutboundHTLCState::Committed => true,
824 OutboundHTLCState::RemoteRemoved => generated_by_local,
825 OutboundHTLCState::AwaitingRemoteRevokeToRemove => generated_by_local,
826 OutboundHTLCState::AwaitingRemovedRemoteRevoke => false,
830 add_htlc_output!(htlc, true);
831 local_htlc_total_msat += htlc.amount_msat;
834 OutboundHTLCState::AwaitingRemoteRevokeToRemove|OutboundHTLCState::AwaitingRemovedRemoteRevoke => {
835 if htlc.fail_reason.is_none() {
836 value_to_self_msat_offset -= htlc.amount_msat as i64;
839 OutboundHTLCState::RemoteRemoved => {
840 if !generated_by_local && htlc.fail_reason.is_none() {
841 value_to_self_msat_offset -= htlc.amount_msat as i64;
850 let value_to_self_msat: i64 = (self.value_to_self_msat - local_htlc_total_msat) as i64 + value_to_self_msat_offset;
851 let value_to_remote_msat: i64 = (self.channel_value_satoshis * 1000 - self.value_to_self_msat - remote_htlc_total_msat) as i64 - value_to_self_msat_offset;
853 #[cfg(debug_assertions)]
855 // Make sure that the to_self/to_remote is always either past the appropriate
856 // channel_reserve *or* it is making progress towards it.
857 // TODO: This should happen after fee calculation, but we don't handle that correctly
859 let mut max_commitment_tx_output = if generated_by_local {
860 self.max_commitment_tx_output_local.lock().unwrap()
862 self.max_commitment_tx_output_remote.lock().unwrap()
864 debug_assert!(max_commitment_tx_output.0 <= value_to_self_msat as u64 || value_to_self_msat / 1000 >= self.their_channel_reserve_satoshis as i64);
865 max_commitment_tx_output.0 = cmp::max(max_commitment_tx_output.0, value_to_self_msat as u64);
866 debug_assert!(max_commitment_tx_output.1 <= value_to_remote_msat as u64 || value_to_remote_msat / 1000 >= Channel::get_our_channel_reserve_satoshis(self.channel_value_satoshis) as i64);
867 max_commitment_tx_output.1 = cmp::max(max_commitment_tx_output.1, value_to_remote_msat as u64);
870 let total_fee: u64 = feerate_per_kw * (COMMITMENT_TX_BASE_WEIGHT + (txouts.len() as u64) * COMMITMENT_TX_WEIGHT_PER_HTLC) / 1000;
871 let (value_to_self, value_to_remote) = if self.channel_outbound {
872 (value_to_self_msat / 1000 - total_fee as i64, value_to_remote_msat / 1000)
874 (value_to_self_msat / 1000, value_to_remote_msat / 1000 - total_fee as i64)
877 let value_to_a = if local { value_to_self } else { value_to_remote };
878 let value_to_b = if local { value_to_remote } else { value_to_self };
880 if value_to_a >= (dust_limit_satoshis as i64) {
882 script_pubkey: chan_utils::get_revokeable_redeemscript(&keys.revocation_key,
883 if local { self.their_to_self_delay } else { BREAKDOWN_TIMEOUT },
884 &keys.a_delayed_payment_key).to_v0_p2wsh(),
885 value: value_to_a as u64
889 if value_to_b >= (dust_limit_satoshis as i64) {
891 script_pubkey: Builder::new().push_opcode(opcodes::All::OP_PUSHBYTES_0)
892 .push_slice(&Hash160::from_data(&keys.b_payment_key.serialize())[..])
894 value: value_to_b as u64
898 transaction_utils::sort_outputs(&mut txouts);
900 let mut outputs: Vec<TxOut> = Vec::with_capacity(txouts.len());
901 let mut htlcs_used: Vec<HTLCOutputInCommitment> = Vec::with_capacity(txouts.len());
902 for (idx, out) in txouts.drain(..).enumerate() {
904 if let Some(out_htlc) = out.1 {
905 htlcs_used.push(out_htlc);
906 htlcs_used.last_mut().unwrap().transaction_output_index = idx as u32;
912 lock_time: ((0x20 as u32) << 8*3) | ((obscured_commitment_transaction_number & 0xffffffu64) as u32),
919 fn get_closing_scriptpubkey(&self) -> Script {
920 let our_channel_close_key_hash = Hash160::from_data(&PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.channel_close_key).serialize());
921 Builder::new().push_opcode(opcodes::All::OP_PUSHBYTES_0).push_slice(&our_channel_close_key_hash[..]).into_script()
925 fn get_closing_transaction_weight(a_scriptpubkey: &Script, b_scriptpubkey: &Script) -> u64 {
926 (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)
930 fn build_closing_transaction(&self, proposed_total_fee_satoshis: u64, skip_remote_output: bool) -> (Transaction, u64) {
932 let mut ins: Vec<TxIn> = Vec::new();
934 previous_output: self.channel_monitor.get_funding_txo().unwrap().into_bitcoin_outpoint(),
935 script_sig: Script::new(),
936 sequence: 0xffffffff,
942 assert!(self.pending_inbound_htlcs.is_empty());
943 assert!(self.pending_outbound_htlcs.is_empty());
944 let mut txouts: Vec<(TxOut, ())> = Vec::new();
946 let mut total_fee_satoshis = proposed_total_fee_satoshis;
947 let value_to_self: i64 = (self.value_to_self_msat as i64) / 1000 - if self.channel_outbound { total_fee_satoshis as i64 } else { 0 };
948 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 };
950 if value_to_self < 0 {
951 assert!(self.channel_outbound);
952 total_fee_satoshis += (-value_to_self) as u64;
953 } else if value_to_remote < 0 {
954 assert!(!self.channel_outbound);
955 total_fee_satoshis += (-value_to_remote) as u64;
958 if !skip_remote_output && value_to_remote as u64 > self.our_dust_limit_satoshis {
960 script_pubkey: self.their_shutdown_scriptpubkey.clone().unwrap(),
961 value: value_to_remote as u64
965 if value_to_self as u64 > self.our_dust_limit_satoshis {
967 script_pubkey: self.get_closing_scriptpubkey(),
968 value: value_to_self as u64
972 transaction_utils::sort_outputs(&mut txouts);
974 let mut outputs: Vec<TxOut> = Vec::new();
975 for out in txouts.drain(..) {
984 }, total_fee_satoshis)
988 /// Creates a set of keys for build_commitment_transaction to generate a transaction which our
989 /// counterparty will sign (ie DO NOT send signatures over a transaction created by this to
990 /// our counterparty!)
991 /// The result is a transaction which we can revoke ownership of (ie a "local" transaction)
992 /// TODO Some magic rust shit to compile-time check this?
993 fn build_local_transaction_keys(&self, commitment_number: u64) -> Result<TxCreationKeys, HandleError> {
994 let per_commitment_point = PublicKey::from_secret_key(&self.secp_ctx, &self.build_local_commitment_secret(commitment_number));
995 let delayed_payment_base = PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.delayed_payment_base_key);
996 let htlc_basepoint = PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.htlc_base_key);
998 Ok(secp_derived_key!(TxCreationKeys::new(&self.secp_ctx, &per_commitment_point, &delayed_payment_base, &htlc_basepoint, &self.their_revocation_basepoint.unwrap(), &self.their_payment_basepoint.unwrap(), &self.their_htlc_basepoint.unwrap()), self.channel_id()))
1002 /// Creates a set of keys for build_commitment_transaction to generate a transaction which we
1003 /// will sign and send to our counterparty.
1004 fn build_remote_transaction_keys(&self) -> Result<TxCreationKeys, HandleError> {
1005 //TODO: Ensure that the payment_key derived here ends up in the library users' wallet as we
1006 //may see payments to it!
1007 let payment_basepoint = PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.payment_base_key);
1008 let revocation_basepoint = PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.revocation_base_key);
1009 let htlc_basepoint = PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.htlc_base_key);
1011 Ok(secp_derived_key!(TxCreationKeys::new(&self.secp_ctx, &self.their_cur_commitment_point.unwrap(), &self.their_delayed_payment_basepoint.unwrap(), &self.their_htlc_basepoint.unwrap(), &revocation_basepoint, &payment_basepoint, &htlc_basepoint), self.channel_id()))
1014 /// Gets the redeemscript for the funding transaction output (ie the funding transaction output
1015 /// pays to get_funding_redeemscript().to_v0_p2wsh()).
1016 /// Panics if called before accept_channel/new_from_req
1017 pub fn get_funding_redeemscript(&self) -> Script {
1018 let builder = Builder::new().push_opcode(opcodes::All::OP_PUSHNUM_2);
1019 let our_funding_key = PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.funding_key).serialize();
1020 let their_funding_key = self.their_funding_pubkey.expect("get_funding_redeemscript only allowed after accept_channel").serialize();
1021 if our_funding_key[..] < their_funding_key[..] {
1022 builder.push_slice(&our_funding_key)
1023 .push_slice(&their_funding_key)
1025 builder.push_slice(&their_funding_key)
1026 .push_slice(&our_funding_key)
1027 }.push_opcode(opcodes::All::OP_PUSHNUM_2).push_opcode(opcodes::All::OP_CHECKMULTISIG).into_script()
1030 fn sign_commitment_transaction(&self, tx: &mut Transaction, their_sig: &Signature) -> Signature {
1031 if tx.input.len() != 1 {
1032 panic!("Tried to sign commitment transaction that had input count != 1!");
1034 if tx.input[0].witness.len() != 0 {
1035 panic!("Tried to re-sign commitment transaction");
1038 let funding_redeemscript = self.get_funding_redeemscript();
1040 let sighash = Message::from_slice(&bip143::SighashComponents::new(&tx).sighash_all(&tx.input[0], &funding_redeemscript, self.channel_value_satoshis)[..]).unwrap();
1041 let our_sig = self.secp_ctx.sign(&sighash, &self.local_keys.funding_key);
1043 tx.input[0].witness.push(Vec::new()); // First is the multisig dummy
1045 let our_funding_key = PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.funding_key).serialize();
1046 let their_funding_key = self.their_funding_pubkey.unwrap().serialize();
1047 if our_funding_key[..] < their_funding_key[..] {
1048 tx.input[0].witness.push(our_sig.serialize_der(&self.secp_ctx).to_vec());
1049 tx.input[0].witness.push(their_sig.serialize_der(&self.secp_ctx).to_vec());
1051 tx.input[0].witness.push(their_sig.serialize_der(&self.secp_ctx).to_vec());
1052 tx.input[0].witness.push(our_sig.serialize_der(&self.secp_ctx).to_vec());
1054 tx.input[0].witness[1].push(SigHashType::All as u8);
1055 tx.input[0].witness[2].push(SigHashType::All as u8);
1057 tx.input[0].witness.push(funding_redeemscript.into_bytes());
1062 /// Builds the htlc-success or htlc-timeout transaction which spends a given HTLC output
1063 /// @local is used only to convert relevant internal structures which refer to remote vs local
1064 /// to decide value of outputs and direction of HTLCs.
1065 fn build_htlc_transaction(&self, prev_hash: &Sha256dHash, htlc: &HTLCOutputInCommitment, local: bool, keys: &TxCreationKeys, feerate_per_kw: u64) -> Transaction {
1066 chan_utils::build_htlc_transaction(prev_hash, feerate_per_kw, if local { self.their_to_self_delay } else { BREAKDOWN_TIMEOUT }, htlc, &keys.a_delayed_payment_key, &keys.revocation_key)
1069 fn create_htlc_tx_signature(&self, tx: &Transaction, htlc: &HTLCOutputInCommitment, keys: &TxCreationKeys) -> Result<(Script, Signature, bool), HandleError> {
1070 if tx.input.len() != 1 {
1071 panic!("Tried to sign HTLC transaction that had input count != 1!");
1074 let htlc_redeemscript = chan_utils::get_htlc_redeemscript(&htlc, &keys);
1076 let our_htlc_key = secp_derived_key!(chan_utils::derive_private_key(&self.secp_ctx, &keys.per_commitment_point, &self.local_keys.htlc_base_key), self.channel_id());
1077 let sighash = Message::from_slice(&bip143::SighashComponents::new(&tx).sighash_all(&tx.input[0], &htlc_redeemscript, htlc.amount_msat / 1000)[..]).unwrap();
1078 let is_local_tx = PublicKey::from_secret_key(&self.secp_ctx, &our_htlc_key) == keys.a_htlc_key;
1079 Ok((htlc_redeemscript, self.secp_ctx.sign(&sighash, &our_htlc_key), is_local_tx))
1082 /// Signs a transaction created by build_htlc_transaction. If the transaction is an
1083 /// HTLC-Success transaction (ie htlc.offered is false), preimate must be set!
1084 fn sign_htlc_transaction(&self, tx: &mut Transaction, their_sig: &Signature, preimage: &Option<[u8; 32]>, htlc: &HTLCOutputInCommitment, keys: &TxCreationKeys) -> Result<Signature, HandleError> {
1085 if tx.input.len() != 1 {
1086 panic!("Tried to sign HTLC transaction that had input count != 1!");
1088 if tx.input[0].witness.len() != 0 {
1089 panic!("Tried to re-sign HTLC transaction");
1092 let (htlc_redeemscript, our_sig, local_tx) = self.create_htlc_tx_signature(tx, htlc, keys)?;
1094 tx.input[0].witness.push(Vec::new()); // First is the multisig dummy
1096 if local_tx { // b, then a
1097 tx.input[0].witness.push(their_sig.serialize_der(&self.secp_ctx).to_vec());
1098 tx.input[0].witness.push(our_sig.serialize_der(&self.secp_ctx).to_vec());
1100 tx.input[0].witness.push(our_sig.serialize_der(&self.secp_ctx).to_vec());
1101 tx.input[0].witness.push(their_sig.serialize_der(&self.secp_ctx).to_vec());
1103 tx.input[0].witness[1].push(SigHashType::All as u8);
1104 tx.input[0].witness[2].push(SigHashType::All as u8);
1107 tx.input[0].witness.push(Vec::new());
1109 tx.input[0].witness.push(preimage.unwrap().to_vec());
1112 tx.input[0].witness.push(htlc_redeemscript.into_bytes());
1117 /// May return an IgnoreError, but should not, and will always return Ok(_) when
1118 /// debug_assertions are turned on
1119 fn get_update_fulfill_htlc(&mut self, htlc_id_arg: u64, payment_preimage_arg: [u8; 32]) -> Result<(Option<msgs::UpdateFulfillHTLC>, Option<ChannelMonitor>), HandleError> {
1120 // Either ChannelFunded got set (which means it wont bet unset) or there is no way any
1121 // caller thought we could have something claimed (cause we wouldn't have accepted in an
1122 // incoming HTLC anyway). If we got to ShutdownComplete, callers aren't allowed to call us,
1124 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
1125 panic!("Was asked to fulfill an HTLC when channel was not in an operational state");
1127 assert_eq!(self.channel_state & ChannelState::ShutdownComplete as u32, 0);
1129 let mut sha = Sha256::new();
1130 sha.input(&payment_preimage_arg);
1131 let mut payment_hash_calc = [0; 32];
1132 sha.result(&mut payment_hash_calc);
1134 let mut pending_idx = std::usize::MAX;
1135 for (idx, htlc) in self.pending_inbound_htlcs.iter().enumerate() {
1136 if htlc.htlc_id == htlc_id_arg {
1137 assert_eq!(htlc.payment_hash, payment_hash_calc);
1138 if let InboundHTLCState::Committed = htlc.state {
1140 debug_assert!(false, "Have an inbound HTLC we tried to claim before it was fully committed to");
1141 // Don't return in release mode here so that we can update channel_monitor
1147 if pending_idx == std::usize::MAX {
1148 debug_assert!(false, "Unable to find a pending HTLC which matched the given HTLC ID");
1149 return Err(HandleError{err: "Unable to find a pending HTLC which matched the given HTLC ID", action: Some(msgs::ErrorAction::IgnoreError)});
1152 // Now update local state:
1154 // We have to put the payment_preimage in the channel_monitor right away here to ensure we
1155 // can claim it even if the channel hits the chain before we see their next commitment.
1156 self.channel_monitor.provide_payment_preimage(&payment_hash_calc, &payment_preimage_arg);
1158 if (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32 | ChannelState::PeerDisconnected as u32)) != 0 {
1159 for pending_update in self.holding_cell_htlc_updates.iter() {
1160 match pending_update {
1161 &HTLCUpdateAwaitingACK::ClaimHTLC { htlc_id, .. } => {
1162 if htlc_id_arg == htlc_id {
1163 debug_assert!(false, "Tried to fulfill an HTLC we already had a pending fulfill for");
1164 return Ok((None, None));
1167 &HTLCUpdateAwaitingACK::FailHTLC { htlc_id, .. } => {
1168 if htlc_id_arg == htlc_id {
1169 debug_assert!(false, "Tried to fulfill an HTLC we already had a holding-cell failure on");
1170 return Err(HandleError{err: "Unable to find a pending HTLC which matched the given HTLC ID", action: Some(msgs::ErrorAction::IgnoreError)});
1176 self.holding_cell_htlc_updates.push(HTLCUpdateAwaitingACK::ClaimHTLC {
1177 payment_preimage: payment_preimage_arg, htlc_id: htlc_id_arg,
1179 return Ok((None, Some(self.channel_monitor.clone())));
1183 let htlc = &mut self.pending_inbound_htlcs[pending_idx];
1184 if let InboundHTLCState::Committed = htlc.state {
1186 debug_assert!(false, "Have an inbound HTLC we tried to claim before it was fully committed to");
1187 return Ok((None, Some(self.channel_monitor.clone())));
1189 htlc.state = InboundHTLCState::LocalRemoved(InboundHTLCRemovalReason::Fulfill(payment_preimage_arg.clone()));
1192 Ok((Some(msgs::UpdateFulfillHTLC {
1193 channel_id: self.channel_id(),
1194 htlc_id: htlc_id_arg,
1195 payment_preimage: payment_preimage_arg,
1196 }), Some(self.channel_monitor.clone())))
1199 pub fn get_update_fulfill_htlc_and_commit(&mut self, htlc_id: u64, payment_preimage: [u8; 32]) -> Result<(Option<(msgs::UpdateFulfillHTLC, msgs::CommitmentSigned)>, Option<ChannelMonitor>), HandleError> {
1200 match self.get_update_fulfill_htlc(htlc_id, payment_preimage)? {
1201 (Some(update_fulfill_htlc), _) => {
1202 let (commitment, monitor_update) = self.send_commitment_no_status_check()?;
1203 Ok((Some((update_fulfill_htlc, commitment)), Some(monitor_update)))
1205 (None, Some(channel_monitor)) => Ok((None, Some(channel_monitor))),
1206 (None, None) => Ok((None, None))
1210 /// May return an IgnoreError, but should not, and will always return Ok(_) when
1211 /// debug_assertions are turned on
1212 pub fn get_update_fail_htlc(&mut self, htlc_id_arg: u64, err_packet: msgs::OnionErrorPacket) -> Result<Option<msgs::UpdateFailHTLC>, HandleError> {
1213 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
1214 panic!("Was asked to fail an HTLC when channel was not in an operational state");
1216 assert_eq!(self.channel_state & ChannelState::ShutdownComplete as u32, 0);
1218 let mut pending_idx = std::usize::MAX;
1219 for (idx, htlc) in self.pending_inbound_htlcs.iter().enumerate() {
1220 if htlc.htlc_id == htlc_id_arg {
1221 if let InboundHTLCState::Committed = htlc.state {
1223 debug_assert!(false, "Have an inbound HTLC we tried to fail before it was fully committed to");
1224 return Err(HandleError{err: "Unable to find a pending HTLC which matched the given HTLC ID", action: Some(msgs::ErrorAction::IgnoreError)});
1229 if pending_idx == std::usize::MAX {
1230 debug_assert!(false, "Unable to find a pending HTLC which matched the given HTLC ID");
1231 return Err(HandleError{err: "Unable to find a pending HTLC which matched the given HTLC ID", action: Some(msgs::ErrorAction::IgnoreError)});
1234 // Now update local state:
1235 if (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32 | ChannelState::PeerDisconnected as u32)) != 0 {
1236 for pending_update in self.holding_cell_htlc_updates.iter() {
1237 match pending_update {
1238 &HTLCUpdateAwaitingACK::ClaimHTLC { htlc_id, .. } => {
1239 if htlc_id_arg == htlc_id {
1240 debug_assert!(false, "Unable to find a pending HTLC which matched the given HTLC ID");
1241 return Err(HandleError{err: "Unable to find a pending HTLC which matched the given HTLC ID", action: Some(msgs::ErrorAction::IgnoreError)});
1244 &HTLCUpdateAwaitingACK::FailHTLC { htlc_id, .. } => {
1245 if htlc_id_arg == htlc_id {
1246 debug_assert!(false, "Tried to fail an HTLC that we already had a pending failure for");
1253 self.holding_cell_htlc_updates.push(HTLCUpdateAwaitingACK::FailHTLC {
1254 htlc_id: htlc_id_arg,
1261 let htlc = &mut self.pending_inbound_htlcs[pending_idx];
1262 htlc.state = InboundHTLCState::LocalRemoved(InboundHTLCRemovalReason::FailRelay(err_packet.clone()));
1265 Ok(Some(msgs::UpdateFailHTLC {
1266 channel_id: self.channel_id(),
1267 htlc_id: htlc_id_arg,
1272 pub fn get_update_fail_htlc_and_commit(&mut self, htlc_id: u64, err_packet: msgs::OnionErrorPacket) -> Result<Option<(msgs::UpdateFailHTLC, msgs::CommitmentSigned, ChannelMonitor)>, HandleError> {
1273 match self.get_update_fail_htlc(htlc_id, err_packet)? {
1274 Some(update_fail_htlc) => {
1275 let (commitment, monitor_update) = self.send_commitment_no_status_check()?;
1276 Ok(Some((update_fail_htlc, commitment, monitor_update)))
1282 // Message handlers:
1284 pub fn accept_channel(&mut self, msg: &msgs::AcceptChannel) -> Result<(), ChannelError> {
1285 // Check sanity of message fields:
1286 if !self.channel_outbound {
1287 return Err(ChannelError::Close("Got an accept_channel message from an inbound peer"));
1289 if self.channel_state != ChannelState::OurInitSent as u32 {
1290 return Err(ChannelError::Close("Got an accept_channel message at a strange time"));
1292 if msg.dust_limit_satoshis > 21000000 * 100000000 {
1293 return Err(ChannelError::Close("Peer never wants payout outputs?"));
1295 if msg.channel_reserve_satoshis > self.channel_value_satoshis {
1296 return Err(ChannelError::Close("Bogus channel_reserve_satoshis"));
1298 if msg.dust_limit_satoshis > msg.channel_reserve_satoshis {
1299 return Err(ChannelError::Close("Bogus channel_reserve and dust_limit"));
1301 if msg.channel_reserve_satoshis < self.our_dust_limit_satoshis {
1302 return Err(ChannelError::Close("Peer never wants payout outputs?"));
1304 if msg.dust_limit_satoshis > Channel::get_our_channel_reserve_satoshis(self.channel_value_satoshis) {
1305 return Err(ChannelError::Close("Dust limit is bigger than our channel reverse"));
1307 if msg.htlc_minimum_msat >= (self.channel_value_satoshis - msg.channel_reserve_satoshis) * 1000 {
1308 return Err(ChannelError::Close("Minimum htlc value is full channel value"));
1310 if msg.minimum_depth > Channel::derive_maximum_minimum_depth(self.channel_value_satoshis*1000, self.value_to_self_msat) {
1311 return Err(ChannelError::Close("minimum_depth too large"));
1313 if msg.to_self_delay > MAX_LOCAL_BREAKDOWN_TIMEOUT {
1314 return Err(ChannelError::Close("They wanted our payments to be delayed by a needlessly long period"));
1316 if msg.max_accepted_htlcs < 1 {
1317 return Err(ChannelError::Close("0 max_accpted_htlcs makes for a useless channel"));
1319 if msg.max_accepted_htlcs > 483 {
1320 return Err(ChannelError::Close("max_accpted_htlcs > 483"));
1323 // TODO: Optional additional constraints mentioned in the spec
1324 // MAY fail the channel if
1325 // funding_satoshi is too small
1326 // htlc_minimum_msat too large
1327 // max_htlc_value_in_flight_msat too small
1328 // channel_reserve_satoshis too large
1329 // max_accepted_htlcs too small
1330 // dust_limit_satoshis too small
1332 self.channel_monitor.set_their_base_keys(&msg.htlc_basepoint, &msg.delayed_payment_basepoint);
1334 self.their_dust_limit_satoshis = msg.dust_limit_satoshis;
1335 self.their_max_htlc_value_in_flight_msat = cmp::min(msg.max_htlc_value_in_flight_msat, self.channel_value_satoshis * 1000);
1336 self.their_channel_reserve_satoshis = msg.channel_reserve_satoshis;
1337 self.their_htlc_minimum_msat = msg.htlc_minimum_msat;
1338 self.their_to_self_delay = msg.to_self_delay;
1339 self.their_max_accepted_htlcs = msg.max_accepted_htlcs;
1340 self.their_funding_pubkey = Some(msg.funding_pubkey);
1341 self.their_revocation_basepoint = Some(msg.revocation_basepoint);
1342 self.their_payment_basepoint = Some(msg.payment_basepoint);
1343 self.their_delayed_payment_basepoint = Some(msg.delayed_payment_basepoint);
1344 self.their_htlc_basepoint = Some(msg.htlc_basepoint);
1345 self.their_cur_commitment_point = Some(msg.first_per_commitment_point);
1347 let obscure_factor = self.get_commitment_transaction_number_obscure_factor();
1348 self.channel_monitor.set_commitment_obscure_factor(obscure_factor);
1349 self.channel_monitor.set_their_to_self_delay(msg.to_self_delay);
1351 self.channel_state = ChannelState::OurInitSent as u32 | ChannelState::TheirInitSent as u32;
1356 fn funding_created_signature(&mut self, sig: &Signature) -> Result<(Transaction, Signature), HandleError> {
1357 let funding_script = self.get_funding_redeemscript();
1359 let local_keys = self.build_local_transaction_keys(self.cur_local_commitment_transaction_number)?;
1360 let local_initial_commitment_tx = self.build_commitment_transaction(self.cur_local_commitment_transaction_number, &local_keys, true, false, self.feerate_per_kw).0;
1361 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();
1363 // They sign the "local" commitment transaction, allowing us to broadcast the tx if we wish.
1364 secp_call!(self.secp_ctx.verify(&local_sighash, &sig, &self.their_funding_pubkey.unwrap()), "Invalid funding_created signature from peer", self.channel_id());
1366 let remote_keys = self.build_remote_transaction_keys()?;
1367 let remote_initial_commitment_tx = self.build_commitment_transaction(self.cur_remote_commitment_transaction_number, &remote_keys, false, false, self.feerate_per_kw).0;
1368 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();
1370 // We sign the "remote" commitment transaction, allowing them to broadcast the tx if they wish.
1371 Ok((remote_initial_commitment_tx, self.secp_ctx.sign(&remote_sighash, &self.local_keys.funding_key)))
1374 pub fn funding_created(&mut self, msg: &msgs::FundingCreated) -> Result<(msgs::FundingSigned, ChannelMonitor), HandleError> {
1375 if self.channel_outbound {
1376 return Err(HandleError{err: "Received funding_created for an outbound channel?", action: Some(msgs::ErrorAction::SendErrorMessage {msg: msgs::ErrorMessage {channel_id: self.channel_id, data: "Received funding_created for an outbound channel?".to_string()}})});
1378 if self.channel_state != (ChannelState::OurInitSent as u32 | ChannelState::TheirInitSent as u32) {
1379 // BOLT 2 says that if we disconnect before we send funding_signed we SHOULD NOT
1380 // remember the channel, so its safe to just send an error_message here and drop the
1382 return Err(HandleError{err: "Received funding_created after we got the channel!", action: Some(msgs::ErrorAction::SendErrorMessage {msg: msgs::ErrorMessage {channel_id: self.channel_id, data: "Received funding_created after we got the channel!".to_string()}})});
1384 if self.channel_monitor.get_min_seen_secret() != (1 << 48) ||
1385 self.cur_remote_commitment_transaction_number != INITIAL_COMMITMENT_NUMBER ||
1386 self.cur_local_commitment_transaction_number != INITIAL_COMMITMENT_NUMBER {
1387 panic!("Should not have advanced channel commitment tx numbers prior to funding_created");
1390 let funding_txo = OutPoint::new(msg.funding_txid, msg.funding_output_index);
1391 let funding_txo_script = self.get_funding_redeemscript().to_v0_p2wsh();
1392 self.channel_monitor.set_funding_info((funding_txo, funding_txo_script));
1394 let (remote_initial_commitment_tx, our_signature) = match self.funding_created_signature(&msg.signature) {
1397 self.channel_monitor.unset_funding_info();
1402 // Now that we're past error-generating stuff, update our local state:
1404 self.channel_monitor.provide_latest_remote_commitment_tx_info(&remote_initial_commitment_tx, Vec::new(), self.cur_remote_commitment_transaction_number);
1405 self.channel_state = ChannelState::FundingSent as u32;
1406 self.channel_id = funding_txo.to_channel_id();
1407 self.cur_remote_commitment_transaction_number -= 1;
1408 self.cur_local_commitment_transaction_number -= 1;
1410 Ok((msgs::FundingSigned {
1411 channel_id: self.channel_id,
1412 signature: our_signature
1413 }, self.channel_monitor.clone()))
1416 /// Handles a funding_signed message from the remote end.
1417 /// If this call is successful, broadcast the funding transaction (and not before!)
1418 pub fn funding_signed(&mut self, msg: &msgs::FundingSigned) -> Result<ChannelMonitor, HandleError> {
1419 if !self.channel_outbound {
1420 return Err(HandleError{err: "Received funding_signed for an inbound channel?", action: None});
1422 if self.channel_state != ChannelState::FundingCreated as u32 {
1423 return Err(HandleError{err: "Received funding_signed in strange state!", action: None});
1425 if self.channel_monitor.get_min_seen_secret() != (1 << 48) ||
1426 self.cur_remote_commitment_transaction_number != INITIAL_COMMITMENT_NUMBER - 1 ||
1427 self.cur_local_commitment_transaction_number != INITIAL_COMMITMENT_NUMBER {
1428 panic!("Should not have advanced channel commitment tx numbers prior to funding_created");
1431 let funding_script = self.get_funding_redeemscript();
1433 let local_keys = self.build_local_transaction_keys(self.cur_local_commitment_transaction_number)?;
1434 let mut local_initial_commitment_tx = self.build_commitment_transaction(self.cur_local_commitment_transaction_number, &local_keys, true, false, self.feerate_per_kw).0;
1435 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();
1437 // They sign the "local" commitment transaction, allowing us to broadcast the tx if we wish.
1438 secp_call!(self.secp_ctx.verify(&local_sighash, &msg.signature, &self.their_funding_pubkey.unwrap()), "Invalid funding_signed signature from peer", self.channel_id());
1440 self.sign_commitment_transaction(&mut local_initial_commitment_tx, &msg.signature);
1441 self.channel_monitor.provide_latest_local_commitment_tx_info(local_initial_commitment_tx.clone(), local_keys, self.feerate_per_kw, Vec::new());
1442 self.last_local_commitment_txn = vec![local_initial_commitment_tx];
1443 self.channel_state = ChannelState::FundingSent as u32;
1444 self.cur_local_commitment_transaction_number -= 1;
1446 Ok(self.channel_monitor.clone())
1449 pub fn funding_locked(&mut self, msg: &msgs::FundingLocked) -> Result<(), ChannelError> {
1450 if self.channel_state & (ChannelState::PeerDisconnected as u32) == ChannelState::PeerDisconnected as u32 {
1451 return Err(ChannelError::Close("Peer sent funding_locked when we needed a channel_reestablish"));
1453 let non_shutdown_state = self.channel_state & (!BOTH_SIDES_SHUTDOWN_MASK);
1454 if non_shutdown_state == ChannelState::FundingSent as u32 {
1455 self.channel_state |= ChannelState::TheirFundingLocked as u32;
1456 } else if non_shutdown_state == (ChannelState::FundingSent as u32 | ChannelState::OurFundingLocked as u32) {
1457 self.channel_state = ChannelState::ChannelFunded as u32 | (self.channel_state & BOTH_SIDES_SHUTDOWN_MASK);
1458 self.channel_update_count += 1;
1459 } else if self.channel_state & (ChannelState::ChannelFunded as u32) != 0 &&
1460 // Note that funding_signed/funding_created will have decremented both by 1!
1461 self.cur_local_commitment_transaction_number == INITIAL_COMMITMENT_NUMBER - 1 &&
1462 self.cur_remote_commitment_transaction_number == INITIAL_COMMITMENT_NUMBER - 1 {
1463 if self.their_cur_commitment_point != Some(msg.next_per_commitment_point) {
1464 return Err(ChannelError::Close("Peer sent a reconnect funding_locked with a different point"));
1466 // They probably disconnected/reconnected and re-sent the funding_locked, which is required
1469 return Err(ChannelError::Close("Peer sent a funding_locked at a strange time"));
1472 self.their_prev_commitment_point = self.their_cur_commitment_point;
1473 self.their_cur_commitment_point = Some(msg.next_per_commitment_point);
1477 /// Returns (inbound_htlc_count, htlc_inbound_value_msat)
1478 fn get_inbound_pending_htlc_stats(&self) -> (u32, u64) {
1479 let mut htlc_inbound_value_msat = 0;
1480 for ref htlc in self.pending_inbound_htlcs.iter() {
1481 htlc_inbound_value_msat += htlc.amount_msat;
1483 (self.pending_inbound_htlcs.len() as u32, htlc_inbound_value_msat)
1486 /// Returns (outbound_htlc_count, htlc_outbound_value_msat)
1487 fn get_outbound_pending_htlc_stats(&self) -> (u32, u64) {
1488 let mut htlc_outbound_value_msat = 0;
1489 for ref htlc in self.pending_outbound_htlcs.iter() {
1490 htlc_outbound_value_msat += htlc.amount_msat;
1493 (self.pending_outbound_htlcs.len() as u32, htlc_outbound_value_msat)
1496 pub fn update_add_htlc(&mut self, msg: &msgs::UpdateAddHTLC, pending_forward_state: PendingHTLCStatus) -> Result<(), HandleError> {
1497 if (self.channel_state & (ChannelState::ChannelFunded as u32 | ChannelState::RemoteShutdownSent as u32)) != (ChannelState::ChannelFunded as u32) {
1498 return Err(HandleError{err: "Got add HTLC message when channel was not in an operational state", action: None});
1500 if self.channel_state & (ChannelState::PeerDisconnected as u32) == ChannelState::PeerDisconnected as u32 {
1501 return Err(HandleError{err: "Peer sent update_add_htlc when we needed a channel_reestablish", action: Some(msgs::ErrorAction::SendErrorMessage{msg: msgs::ErrorMessage{data: "Peer sent update_add_htlc when we needed a channel_reestablish".to_string(), channel_id: msg.channel_id}})});
1503 if msg.amount_msat > self.channel_value_satoshis * 1000 {
1504 return Err(HandleError{err: "Remote side tried to send more than the total value of the channel", action: None});
1506 if msg.amount_msat < self.our_htlc_minimum_msat {
1507 return Err(HandleError{err: "Remote side tried to send less than our minimum HTLC value", action: None});
1510 let (inbound_htlc_count, htlc_inbound_value_msat) = self.get_inbound_pending_htlc_stats();
1511 if inbound_htlc_count + 1 > OUR_MAX_HTLCS as u32 {
1512 return Err(HandleError{err: "Remote tried to push more than our max accepted HTLCs", action: None});
1514 //TODO: Spec is unclear if this is per-direction or in total (I assume per direction):
1515 // Check our_max_htlc_value_in_flight_msat
1516 if htlc_inbound_value_msat + msg.amount_msat > Channel::get_our_max_htlc_value_in_flight_msat(self.channel_value_satoshis) {
1517 return Err(HandleError{err: "Remote HTLC add would put them over their max HTLC value in flight", action: None});
1519 // Check our_channel_reserve_satoshis (we're getting paid, so they have to at least meet
1520 // the reserve_satoshis we told them to always have as direct payment so that they lose
1521 // something if we punish them for broadcasting an old state).
1522 if htlc_inbound_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 {
1523 return Err(HandleError{err: "Remote HTLC add would put them over their reserve value", action: None});
1525 if self.next_remote_htlc_id != msg.htlc_id {
1526 return Err(HandleError{err: "Remote skipped HTLC ID", action: None});
1528 if msg.cltv_expiry >= 500000000 {
1529 return Err(HandleError{err: "Remote provided CLTV expiry in seconds instead of block height", action: None});
1532 //TODO: Check msg.cltv_expiry further? Do this in channel manager?
1534 // Now update local state:
1535 self.next_remote_htlc_id += 1;
1536 self.pending_inbound_htlcs.push(InboundHTLCOutput {
1537 htlc_id: msg.htlc_id,
1538 amount_msat: msg.amount_msat,
1539 payment_hash: msg.payment_hash,
1540 cltv_expiry: msg.cltv_expiry,
1541 state: InboundHTLCState::RemoteAnnounced(pending_forward_state),
1547 /// Removes an outbound HTLC which has been commitment_signed by the remote end
1549 fn mark_outbound_htlc_removed(&mut self, htlc_id: u64, check_preimage: Option<[u8; 32]>, fail_reason: Option<HTLCFailReason>) -> Result<&HTLCSource, ChannelError> {
1550 for htlc in self.pending_outbound_htlcs.iter_mut() {
1551 if htlc.htlc_id == htlc_id {
1552 match check_preimage {
1554 Some(payment_hash) =>
1555 if payment_hash != htlc.payment_hash {
1556 return Err(ChannelError::Close("Remote tried to fulfill HTLC with an incorrect preimage"));
1560 OutboundHTLCState::LocalAnnounced(_) =>
1561 return Err(ChannelError::Close("Remote tried to fulfill HTLC before it had been committed")),
1562 OutboundHTLCState::Committed => {
1563 htlc.state = OutboundHTLCState::RemoteRemoved;
1564 htlc.fail_reason = fail_reason;
1566 OutboundHTLCState::AwaitingRemoteRevokeToRemove | OutboundHTLCState::AwaitingRemovedRemoteRevoke | OutboundHTLCState::RemoteRemoved =>
1567 return Err(ChannelError::Close("Remote tried to fulfill HTLC that they'd already fulfilled")),
1569 return Ok(&htlc.source);
1572 Err(ChannelError::Close("Remote tried to fulfill/fail an HTLC we couldn't find"))
1575 pub fn update_fulfill_htlc(&mut self, msg: &msgs::UpdateFulfillHTLC) -> Result<&HTLCSource, ChannelError> {
1576 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
1577 return Err(ChannelError::Close("Got fulfill HTLC message when channel was not in an operational state"));
1579 if self.channel_state & (ChannelState::PeerDisconnected as u32) == ChannelState::PeerDisconnected as u32 {
1580 return Err(ChannelError::Close("Peer sent update_fulfill_htlc when we needed a channel_reestablish"));
1583 let mut sha = Sha256::new();
1584 sha.input(&msg.payment_preimage);
1585 let mut payment_hash = [0; 32];
1586 sha.result(&mut payment_hash);
1588 self.mark_outbound_htlc_removed(msg.htlc_id, Some(payment_hash), None)
1591 pub fn update_fail_htlc(&mut self, msg: &msgs::UpdateFailHTLC, fail_reason: HTLCFailReason) -> Result<&HTLCSource, ChannelError> {
1592 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
1593 return Err(ChannelError::Close("Got fail HTLC message when channel was not in an operational state"));
1595 if self.channel_state & (ChannelState::PeerDisconnected as u32) == ChannelState::PeerDisconnected as u32 {
1596 return Err(ChannelError::Close("Peer sent update_fail_htlc when we needed a channel_reestablish"));
1599 self.mark_outbound_htlc_removed(msg.htlc_id, None, Some(fail_reason))
1602 pub fn update_fail_malformed_htlc<'a>(&mut self, msg: &msgs::UpdateFailMalformedHTLC, fail_reason: HTLCFailReason) -> Result<&HTLCSource, ChannelError> {
1603 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
1604 return Err(ChannelError::Close("Got fail malformed HTLC message when channel was not in an operational state"));
1606 if self.channel_state & (ChannelState::PeerDisconnected as u32) == ChannelState::PeerDisconnected as u32 {
1607 return Err(ChannelError::Close("Peer sent update_fail_malformed_htlc when we needed a channel_reestablish"));
1610 self.mark_outbound_htlc_removed(msg.htlc_id, None, Some(fail_reason))
1613 pub fn commitment_signed(&mut self, msg: &msgs::CommitmentSigned) -> Result<(msgs::RevokeAndACK, Option<msgs::CommitmentSigned>, ChannelMonitor), HandleError> {
1614 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
1615 return Err(HandleError{err: "Got commitment signed message when channel was not in an operational state", action: None});
1617 if self.channel_state & (ChannelState::PeerDisconnected as u32) == ChannelState::PeerDisconnected as u32 {
1618 return Err(HandleError{err: "Peer sent commitment_signed when we needed a channel_reestablish", action: Some(msgs::ErrorAction::SendErrorMessage{msg: msgs::ErrorMessage{data: "Peer sent commitment_signed when we needed a channel_reestablish".to_string(), channel_id: msg.channel_id}})});
1621 let funding_script = self.get_funding_redeemscript();
1623 let local_keys = self.build_local_transaction_keys(self.cur_local_commitment_transaction_number)?;
1625 let feerate_per_kw = if !self.channel_outbound && self.pending_update_fee.is_some() {
1626 self.pending_update_fee.unwrap()
1631 let mut local_commitment_tx = self.build_commitment_transaction(self.cur_local_commitment_transaction_number, &local_keys, true, false, feerate_per_kw);
1632 let local_commitment_txid = local_commitment_tx.0.txid();
1633 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();
1634 secp_call!(self.secp_ctx.verify(&local_sighash, &msg.signature, &self.their_funding_pubkey.unwrap()), "Invalid commitment tx signature from peer", self.channel_id());
1636 if msg.htlc_signatures.len() != local_commitment_tx.1.len() {
1637 return Err(HandleError{err: "Got wrong number of HTLC signatures from remote", action: None});
1640 let mut new_local_commitment_txn = Vec::with_capacity(local_commitment_tx.1.len() + 1);
1641 self.sign_commitment_transaction(&mut local_commitment_tx.0, &msg.signature);
1642 new_local_commitment_txn.push(local_commitment_tx.0.clone());
1644 let mut htlcs_and_sigs = Vec::with_capacity(local_commitment_tx.1.len());
1645 for (idx, ref htlc) in local_commitment_tx.1.iter().enumerate() {
1646 let mut htlc_tx = self.build_htlc_transaction(&local_commitment_txid, htlc, true, &local_keys, feerate_per_kw);
1647 let htlc_redeemscript = chan_utils::get_htlc_redeemscript(&htlc, &local_keys);
1648 let htlc_sighash = Message::from_slice(&bip143::SighashComponents::new(&htlc_tx).sighash_all(&htlc_tx.input[0], &htlc_redeemscript, htlc.amount_msat / 1000)[..]).unwrap();
1649 secp_call!(self.secp_ctx.verify(&htlc_sighash, &msg.htlc_signatures[idx], &local_keys.b_htlc_key), "Invalid HTLC tx siganture from peer", self.channel_id());
1650 let htlc_sig = if htlc.offered {
1651 let htlc_sig = self.sign_htlc_transaction(&mut htlc_tx, &msg.htlc_signatures[idx], &None, htlc, &local_keys)?;
1652 new_local_commitment_txn.push(htlc_tx);
1655 self.create_htlc_tx_signature(&htlc_tx, htlc, &local_keys)?.1
1657 htlcs_and_sigs.push(((*htlc).clone(), msg.htlc_signatures[idx], htlc_sig));
1660 let next_per_commitment_point = PublicKey::from_secret_key(&self.secp_ctx, &self.build_local_commitment_secret(self.cur_local_commitment_transaction_number - 1));
1661 let per_commitment_secret = chan_utils::build_commitment_secret(self.local_keys.commitment_seed, self.cur_local_commitment_transaction_number + 1);
1663 // Update state now that we've passed all the can-fail calls...
1664 let mut need_our_commitment = false;
1665 if !self.channel_outbound {
1666 if let Some(fee_update) = self.pending_update_fee {
1667 self.feerate_per_kw = fee_update;
1668 // We later use the presence of pending_update_fee to indicate we should generate a
1669 // commitment_signed upon receipt of revoke_and_ack, so we can only set it to None
1670 // if we're not awaiting a revoke (ie will send a commitment_signed now).
1671 if (self.channel_state & ChannelState::AwaitingRemoteRevoke as u32) == 0 {
1672 need_our_commitment = true;
1673 self.pending_update_fee = None;
1678 self.channel_monitor.provide_latest_local_commitment_tx_info(local_commitment_tx.0, local_keys, self.feerate_per_kw, htlcs_and_sigs);
1680 for htlc in self.pending_inbound_htlcs.iter_mut() {
1681 let new_forward = if let &InboundHTLCState::RemoteAnnounced(ref forward_info) = &htlc.state {
1682 Some(forward_info.clone())
1684 if let Some(forward_info) = new_forward {
1685 htlc.state = InboundHTLCState::AwaitingRemoteRevokeToAnnounce(forward_info);
1686 need_our_commitment = true;
1689 for htlc in self.pending_outbound_htlcs.iter_mut() {
1690 if let OutboundHTLCState::RemoteRemoved = htlc.state {
1691 htlc.state = OutboundHTLCState::AwaitingRemoteRevokeToRemove;
1692 need_our_commitment = true;
1696 self.cur_local_commitment_transaction_number -= 1;
1697 self.last_local_commitment_txn = new_local_commitment_txn;
1699 let (our_commitment_signed, monitor_update) = if need_our_commitment && (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32)) == 0 {
1700 // If we're AwaitingRemoteRevoke we can't send a new commitment here, but that's ok -
1701 // we'll send one right away when we get the revoke_and_ack when we
1702 // free_holding_cell_htlcs().
1703 let (msg, monitor) = self.send_commitment_no_status_check()?;
1704 (Some(msg), monitor)
1705 } else { (None, self.channel_monitor.clone()) };
1707 Ok((msgs::RevokeAndACK {
1708 channel_id: self.channel_id,
1709 per_commitment_secret: per_commitment_secret,
1710 next_per_commitment_point: next_per_commitment_point,
1711 }, our_commitment_signed, monitor_update))
1714 /// Used to fulfill holding_cell_htlcs when we get a remote ack (or implicitly get it by them
1715 /// fulfilling or failing the last pending HTLC)
1716 fn free_holding_cell_htlcs(&mut self) -> Result<Option<(msgs::CommitmentUpdate, ChannelMonitor)>, HandleError> {
1717 if self.holding_cell_htlc_updates.len() != 0 || self.holding_cell_update_fee.is_some() {
1718 let mut htlc_updates = Vec::new();
1719 mem::swap(&mut htlc_updates, &mut self.holding_cell_htlc_updates);
1720 let mut update_add_htlcs = Vec::with_capacity(htlc_updates.len());
1721 let mut update_fulfill_htlcs = Vec::with_capacity(htlc_updates.len());
1722 let mut update_fail_htlcs = Vec::with_capacity(htlc_updates.len());
1724 for htlc_update in htlc_updates.drain(..) {
1725 // Note that this *can* fail, though it should be due to rather-rare conditions on
1726 // fee races with adding too many outputs which push our total payments just over
1727 // the limit. In case its less rare than I anticipate, we may want to revisit
1728 // handling this case better and maybe fufilling some of the HTLCs while attempting
1729 // to rebalance channels.
1730 if err.is_some() { // We're back to AwaitingRemoteRevoke (or are about to fail the channel)
1731 self.holding_cell_htlc_updates.push(htlc_update);
1733 match &htlc_update {
1734 &HTLCUpdateAwaitingACK::AddHTLC {amount_msat, cltv_expiry, payment_hash, ref source, ref onion_routing_packet, ..} => {
1735 match self.send_htlc(amount_msat, payment_hash, cltv_expiry, source.clone(), onion_routing_packet.clone()) {
1736 Ok(update_add_msg_option) => update_add_htlcs.push(update_add_msg_option.unwrap()),
1742 &HTLCUpdateAwaitingACK::ClaimHTLC { payment_preimage, htlc_id, .. } => {
1743 match self.get_update_fulfill_htlc(htlc_id, payment_preimage) {
1744 Ok(update_fulfill_msg_option) => update_fulfill_htlcs.push(update_fulfill_msg_option.0.unwrap()),
1746 if let Some(msgs::ErrorAction::IgnoreError) = e.action {}
1748 panic!("Got a non-IgnoreError action trying to fulfill holding cell HTLC");
1753 &HTLCUpdateAwaitingACK::FailHTLC { htlc_id, ref err_packet } => {
1754 match self.get_update_fail_htlc(htlc_id, err_packet.clone()) {
1755 Ok(update_fail_msg_option) => update_fail_htlcs.push(update_fail_msg_option.unwrap()),
1757 if let Some(msgs::ErrorAction::IgnoreError) = e.action {}
1759 panic!("Got a non-IgnoreError action trying to fail holding cell HTLC");
1766 self.holding_cell_htlc_updates.push(htlc_update);
1770 //TODO: Need to examine the type of err - if its a fee issue or similar we may want to
1771 //fail it back the route, if its a temporary issue we can ignore it...
1774 if update_add_htlcs.is_empty() && update_fulfill_htlcs.is_empty() && update_fail_htlcs.is_empty() && self.holding_cell_update_fee.is_none() {
1775 // This should never actually happen and indicates we got some Errs back
1776 // from update_fulfill_htlc/update_fail_htlc, but we handle it anyway in
1777 // case there is some strange way to hit duplicate HTLC removes.
1780 let update_fee = if let Some(feerate) = self.holding_cell_update_fee {
1781 self.pending_update_fee = self.holding_cell_update_fee.take();
1782 Some(msgs::UpdateFee {
1783 channel_id: self.channel_id,
1784 feerate_per_kw: feerate as u32,
1789 let (commitment_signed, monitor_update) = self.send_commitment_no_status_check()?;
1790 Ok(Some((msgs::CommitmentUpdate {
1792 update_fulfill_htlcs,
1794 update_fail_malformed_htlcs: Vec::new(),
1795 update_fee: update_fee,
1797 }, monitor_update)))
1806 /// Handles receiving a remote's revoke_and_ack. Note that we may return a new
1807 /// commitment_signed message here in case we had pending outbound HTLCs to add which were
1808 /// waiting on this revoke_and_ack. The generation of this new commitment_signed may also fail,
1809 /// generating an appropriate error *after* the channel state has been updated based on the
1810 /// revoke_and_ack message.
1811 pub fn revoke_and_ack(&mut self, msg: &msgs::RevokeAndACK) -> Result<(Option<msgs::CommitmentUpdate>, Vec<(PendingForwardHTLCInfo, u64)>, Vec<(HTLCSource, [u8; 32], HTLCFailReason)>, ChannelMonitor), HandleError> {
1812 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
1813 return Err(HandleError{err: "Got revoke/ACK message when channel was not in an operational state", action: None});
1815 if self.channel_state & (ChannelState::PeerDisconnected as u32) == ChannelState::PeerDisconnected as u32 {
1816 return Err(HandleError{err: "Peer sent revoke_and_ack when we needed a channel_reestablish", action: Some(msgs::ErrorAction::SendErrorMessage{msg: msgs::ErrorMessage{data: "Peer sent revoke_and_ack when we needed a channel_reestablish".to_string(), channel_id: msg.channel_id}})});
1818 if let Some(their_prev_commitment_point) = self.their_prev_commitment_point {
1819 if PublicKey::from_secret_key(&self.secp_ctx, &secp_call!(SecretKey::from_slice(&self.secp_ctx, &msg.per_commitment_secret), "Peer provided an invalid per_commitment_secret", self.channel_id())) != their_prev_commitment_point {
1820 return Err(HandleError{err: "Got a revoke commitment secret which didn't correspond to their current pubkey", action: None});
1823 self.channel_monitor.provide_secret(self.cur_remote_commitment_transaction_number + 1, msg.per_commitment_secret, Some((self.cur_remote_commitment_transaction_number - 1, msg.next_per_commitment_point)))?;
1825 // Update state now that we've passed all the can-fail calls...
1826 // (note that we may still fail to generate the new commitment_signed message, but that's
1827 // OK, we step the channel here and *then* if the new generation fails we can fail the
1828 // channel based on that, but stepping stuff here should be safe either way.
1829 self.channel_state &= !(ChannelState::AwaitingRemoteRevoke as u32);
1830 self.their_prev_commitment_point = self.their_cur_commitment_point;
1831 self.their_cur_commitment_point = Some(msg.next_per_commitment_point);
1832 self.cur_remote_commitment_transaction_number -= 1;
1834 let mut to_forward_infos = Vec::new();
1835 let mut revoked_htlcs = Vec::new();
1836 let mut update_fail_htlcs = Vec::new();
1837 let mut update_fail_malformed_htlcs = Vec::new();
1838 let mut require_commitment = false;
1839 let mut value_to_self_msat_diff: i64 = 0;
1840 // We really shouldnt have two passes here, but retain gives a non-mutable ref (Rust bug)
1841 self.pending_inbound_htlcs.retain(|htlc| {
1842 if let &InboundHTLCState::LocalRemoved(ref reason) = &htlc.state {
1843 if let &InboundHTLCRemovalReason::Fulfill(_) = reason {
1844 value_to_self_msat_diff += htlc.amount_msat as i64;
1849 self.pending_outbound_htlcs.retain(|htlc| {
1850 if let OutboundHTLCState::AwaitingRemovedRemoteRevoke = htlc.state {
1851 if let Some(reason) = htlc.fail_reason.clone() { // We really want take() here, but, again, non-mut ref :(
1852 revoked_htlcs.push((htlc.source.clone(), htlc.payment_hash, reason));
1854 // They fulfilled, so we sent them money
1855 value_to_self_msat_diff -= htlc.amount_msat as i64;
1860 for htlc in self.pending_inbound_htlcs.iter_mut() {
1861 let swap = if let &InboundHTLCState::AwaitingRemoteRevokeToAnnounce(_) = &htlc.state {
1863 } else if let &InboundHTLCState::AwaitingAnnouncedRemoteRevoke(_) = &htlc.state {
1867 let mut state = InboundHTLCState::Committed;
1868 mem::swap(&mut state, &mut htlc.state);
1870 if let InboundHTLCState::AwaitingRemoteRevokeToAnnounce(forward_info) = state {
1871 htlc.state = InboundHTLCState::AwaitingAnnouncedRemoteRevoke(forward_info);
1872 require_commitment = true;
1873 } else if let InboundHTLCState::AwaitingAnnouncedRemoteRevoke(forward_info) = state {
1874 match forward_info {
1875 PendingHTLCStatus::Fail(fail_msg) => {
1876 require_commitment = true;
1878 HTLCFailureMsg::Relay(msg) => {
1879 htlc.state = InboundHTLCState::LocalRemoved(InboundHTLCRemovalReason::FailRelay(msg.reason.clone()));
1880 update_fail_htlcs.push(msg)
1882 HTLCFailureMsg::Malformed(msg) => {
1883 htlc.state = InboundHTLCState::LocalRemoved(InboundHTLCRemovalReason::FailMalformed((msg.sha256_of_onion, msg.failure_code)));
1884 update_fail_malformed_htlcs.push(msg)
1888 PendingHTLCStatus::Forward(forward_info) => {
1889 to_forward_infos.push((forward_info, htlc.htlc_id));
1890 htlc.state = InboundHTLCState::Committed;
1896 for htlc in self.pending_outbound_htlcs.iter_mut() {
1897 if let OutboundHTLCState::LocalAnnounced(_) = htlc.state {
1898 htlc.state = OutboundHTLCState::Committed;
1899 } else if let OutboundHTLCState::AwaitingRemoteRevokeToRemove = htlc.state {
1900 htlc.state = OutboundHTLCState::AwaitingRemovedRemoteRevoke;
1901 require_commitment = true;
1904 self.value_to_self_msat = (self.value_to_self_msat as i64 + value_to_self_msat_diff) as u64;
1906 if self.channel_outbound {
1907 if let Some(feerate) = self.pending_update_fee.take() {
1908 self.feerate_per_kw = feerate;
1911 if let Some(feerate) = self.pending_update_fee {
1912 // Because a node cannot send two commitment_signed's in a row without getting a
1913 // revoke_and_ack from us (as it would otherwise not know the per_commitment_point
1914 // it should use to create keys with) and because a node can't send a
1915 // commitment_signed without changes, checking if the feerate is equal to the
1916 // pending feerate update is sufficient to detect require_commitment.
1917 if feerate == self.feerate_per_kw {
1918 require_commitment = true;
1919 self.pending_update_fee = None;
1924 match self.free_holding_cell_htlcs()? {
1925 Some(mut commitment_update) => {
1926 commitment_update.0.update_fail_htlcs.reserve(update_fail_htlcs.len());
1927 for fail_msg in update_fail_htlcs.drain(..) {
1928 commitment_update.0.update_fail_htlcs.push(fail_msg);
1930 commitment_update.0.update_fail_malformed_htlcs.reserve(update_fail_malformed_htlcs.len());
1931 for fail_msg in update_fail_malformed_htlcs.drain(..) {
1932 commitment_update.0.update_fail_malformed_htlcs.push(fail_msg);
1934 Ok((Some(commitment_update.0), to_forward_infos, revoked_htlcs, commitment_update.1))
1937 if require_commitment {
1938 let (commitment_signed, monitor_update) = self.send_commitment_no_status_check()?;
1939 Ok((Some(msgs::CommitmentUpdate {
1940 update_add_htlcs: Vec::new(),
1941 update_fulfill_htlcs: Vec::new(),
1943 update_fail_malformed_htlcs,
1946 }), to_forward_infos, revoked_htlcs, monitor_update))
1948 Ok((None, to_forward_infos, revoked_htlcs, self.channel_monitor.clone()))
1955 /// Adds a pending update to this channel. See the doc for send_htlc for
1956 /// further details on the optionness of the return value.
1957 /// You MUST call send_commitment prior to any other calls on this Channel
1958 fn send_update_fee(&mut self, feerate_per_kw: u64) -> Option<msgs::UpdateFee> {
1959 if !self.channel_outbound {
1960 panic!("Cannot send fee from inbound channel");
1963 if !self.is_usable() {
1964 panic!("Cannot update fee until channel is fully established and we haven't started shutting down");
1967 if (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32)) == (ChannelState::AwaitingRemoteRevoke as u32) {
1968 self.holding_cell_update_fee = Some(feerate_per_kw);
1972 debug_assert!(self.pending_update_fee.is_none());
1973 self.pending_update_fee = Some(feerate_per_kw);
1975 Some(msgs::UpdateFee {
1976 channel_id: self.channel_id,
1977 feerate_per_kw: feerate_per_kw as u32,
1981 pub fn send_update_fee_and_commit(&mut self, feerate_per_kw: u64) -> Result<Option<(msgs::UpdateFee, msgs::CommitmentSigned, ChannelMonitor)>, HandleError> {
1982 match self.send_update_fee(feerate_per_kw) {
1983 Some(update_fee) => {
1984 let (commitment_signed, monitor_update) = self.send_commitment_no_status_check()?;
1985 Ok(Some((update_fee, commitment_signed, monitor_update)))
1991 /// Removes any uncommitted HTLCs, to be used on peer disconnection, including any pending
1992 /// HTLCs that we intended to add but haven't as we were waiting on a remote revoke.
1993 /// Returns the set of PendingHTLCStatuses from remote uncommitted HTLCs (which we're
1994 /// implicitly dropping) and the payment_hashes of HTLCs we tried to add but are dropping.
1995 /// No further message handling calls may be made until a channel_reestablish dance has
1997 pub fn remove_uncommitted_htlcs_and_mark_paused(&mut self) -> Vec<(HTLCSource, [u8; 32])> {
1998 let mut outbound_drops = Vec::new();
2000 assert_eq!(self.channel_state & ChannelState::ShutdownComplete as u32, 0);
2001 if self.channel_state < ChannelState::FundingSent as u32 {
2002 self.channel_state = ChannelState::ShutdownComplete as u32;
2003 return outbound_drops;
2006 let mut inbound_drop_count = 0;
2007 self.pending_inbound_htlcs.retain(|htlc| {
2009 InboundHTLCState::RemoteAnnounced(_) => {
2010 // They sent us an update_add_htlc but we never got the commitment_signed.
2011 // We'll tell them what commitment_signed we're expecting next and they'll drop
2012 // this HTLC accordingly
2013 inbound_drop_count += 1;
2016 InboundHTLCState::AwaitingRemoteRevokeToAnnounce(_)|InboundHTLCState::AwaitingAnnouncedRemoteRevoke(_) => {
2017 // We received a commitment_signed updating this HTLC and (at least hopefully)
2018 // sent a revoke_and_ack (which we can re-transmit) and have heard nothing
2019 // in response to it yet, so don't touch it.
2022 InboundHTLCState::Committed => true,
2023 InboundHTLCState::LocalRemoved(_) => {
2024 // We (hopefully) sent a commitment_signed updating this HTLC (which we can
2025 // re-transmit if needed) and they may have even sent a revoke_and_ack back
2026 // (that we missed). Keep this around for now and if they tell us they missed
2027 // the commitment_signed we can re-transmit the update then.
2033 for htlc in self.pending_outbound_htlcs.iter_mut() {
2034 if let OutboundHTLCState::RemoteRemoved = htlc.state {
2035 // They sent us an update to remove this but haven't yet sent the corresponding
2036 // commitment_signed, we need to move it back to Committed and they can re-send
2037 // the update upon reconnection.
2038 htlc.state = OutboundHTLCState::Committed;
2042 self.holding_cell_htlc_updates.retain(|htlc_update| {
2044 &HTLCUpdateAwaitingACK::AddHTLC { ref payment_hash, ref source, .. } => {
2045 outbound_drops.push((source.clone(), payment_hash.clone()));
2048 &HTLCUpdateAwaitingACK::ClaimHTLC {..} | &HTLCUpdateAwaitingACK::FailHTLC {..} => true,
2051 self.channel_state |= ChannelState::PeerDisconnected as u32;
2052 log_debug!(self, "Peer disconnection resulted in {} remote-announced HTLC drops and {} waiting-to-locally-announced HTLC drops on channel {}", outbound_drops.len(), inbound_drop_count, log_bytes!(self.channel_id()));
2056 pub fn update_fee(&mut self, fee_estimator: &FeeEstimator, msg: &msgs::UpdateFee) -> Result<(), ChannelError> {
2057 if self.channel_outbound {
2058 return Err(ChannelError::Close("Non-funding remote tried to update channel fee"));
2060 if self.channel_state & (ChannelState::PeerDisconnected as u32) == ChannelState::PeerDisconnected as u32 {
2061 return Err(ChannelError::Close("Peer sent update_fee when we needed a channel_reestablish"));
2063 Channel::check_remote_fee(fee_estimator, msg.feerate_per_kw)?;
2065 self.pending_update_fee = Some(msg.feerate_per_kw as u64);
2066 self.channel_update_count += 1;
2070 /// May panic if some calls other than message-handling calls (which will all Err immediately)
2071 /// have been called between remove_uncommitted_htlcs_and_mark_paused and this call.
2072 pub fn channel_reestablish(&mut self, msg: &msgs::ChannelReestablish) -> Result<(Option<msgs::FundingLocked>, Option<msgs::RevokeAndACK>, Option<msgs::CommitmentUpdate>, Option<ChannelMonitor>), ChannelError> {
2073 if self.channel_state & (ChannelState::PeerDisconnected as u32) == 0 {
2074 // While BOLT 2 doesn't indicate explicitly we should error this channel here, it
2075 // almost certainly indicates we are going to end up out-of-sync in some way, so we
2076 // just close here instead of trying to recover.
2077 return Err(ChannelError::Close("Peer sent a loose channel_reestablish not after reconnect"));
2080 if msg.next_local_commitment_number == 0 || msg.next_local_commitment_number >= INITIAL_COMMITMENT_NUMBER ||
2081 msg.next_remote_commitment_number == 0 || msg.next_remote_commitment_number >= INITIAL_COMMITMENT_NUMBER {
2082 return Err(ChannelError::Close("Peer send garbage channel_reestablish"));
2085 // Go ahead and unmark PeerDisconnected as various calls we may make check for it (and all
2086 // remaining cases either succeed or ErrorMessage-fail).
2087 self.channel_state &= !(ChannelState::PeerDisconnected as u32);
2089 let mut required_revoke = None;
2090 if msg.next_remote_commitment_number == INITIAL_COMMITMENT_NUMBER - self.cur_local_commitment_transaction_number {
2091 // Remote isn't waiting on any RevokeAndACK from us!
2092 // Note that if we need to repeat our FundingLocked we'll do that in the next if block.
2093 } else if msg.next_remote_commitment_number == (INITIAL_COMMITMENT_NUMBER - 1) - self.cur_local_commitment_transaction_number {
2094 let next_per_commitment_point = PublicKey::from_secret_key(&self.secp_ctx, &self.build_local_commitment_secret(self.cur_local_commitment_transaction_number));
2095 let per_commitment_secret = chan_utils::build_commitment_secret(self.local_keys.commitment_seed, self.cur_local_commitment_transaction_number + 2);
2096 required_revoke = Some(msgs::RevokeAndACK {
2097 channel_id: self.channel_id,
2098 per_commitment_secret,
2099 next_per_commitment_point,
2102 return Err(ChannelError::Close("Peer attempted to reestablish channel with a very old local commitment transaction"));
2105 if msg.next_local_commitment_number == INITIAL_COMMITMENT_NUMBER - self.cur_remote_commitment_transaction_number {
2106 if msg.next_remote_commitment_number == INITIAL_COMMITMENT_NUMBER - self.cur_local_commitment_transaction_number {
2107 log_debug!(self, "Reconnected channel {} with no lost commitment txn", log_bytes!(self.channel_id()));
2108 if msg.next_local_commitment_number == 1 && msg.next_remote_commitment_number == 1 {
2109 let next_per_commitment_secret = self.build_local_commitment_secret(self.cur_local_commitment_transaction_number);
2110 let next_per_commitment_point = PublicKey::from_secret_key(&self.secp_ctx, &next_per_commitment_secret);
2111 return Ok((Some(msgs::FundingLocked {
2112 channel_id: self.channel_id(),
2113 next_per_commitment_point: next_per_commitment_point,
2114 }), None, None, None));
2118 if (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32)) == 0 {
2119 // We're up-to-date and not waiting on a remote revoke (if we are our
2120 // channel_reestablish should result in them sending a revoke_and_ack), but we may
2121 // have received some updates while we were disconnected. Free the holding cell
2123 match self.free_holding_cell_htlcs() {
2125 if let &Some(msgs::ErrorAction::DisconnectPeer{msg: Some(_)}) = &e.action {
2126 return Err(ChannelError::Close(e.err));
2127 } else if let &Some(msgs::ErrorAction::SendErrorMessage{msg: _}) = &e.action {
2128 return Err(ChannelError::Close(e.err));
2130 panic!("Got non-channel-failing result from free_holding_cell_htlcs");
2133 Ok(Some((commitment_update, channel_monitor))) => return Ok((None, required_revoke, Some(commitment_update), Some(channel_monitor))),
2134 Ok(None) => return Ok((None, required_revoke, None, None)),
2137 return Ok((None, required_revoke, None, None));
2139 } else if msg.next_local_commitment_number == (INITIAL_COMMITMENT_NUMBER - 1) - self.cur_remote_commitment_transaction_number {
2140 return Ok((None, required_revoke,
2141 Some(msgs::CommitmentUpdate {
2142 update_add_htlcs: Vec::new(),
2143 update_fulfill_htlcs: Vec::new(),
2144 update_fail_htlcs: Vec::new(),
2145 update_fail_malformed_htlcs: Vec::new(),
2147 commitment_signed: self.send_commitment_no_state_update().expect("It looks like we failed to re-generate a commitment_signed we had previously sent?").0,
2150 return Err(ChannelError::Close("Peer attempted to reestablish channel with a very old remote commitment transaction"));
2154 pub fn shutdown(&mut self, fee_estimator: &FeeEstimator, msg: &msgs::Shutdown) -> Result<(Option<msgs::Shutdown>, Option<msgs::ClosingSigned>, Vec<(HTLCSource, [u8; 32])>), HandleError> {
2155 if self.channel_state & (ChannelState::PeerDisconnected as u32) == ChannelState::PeerDisconnected as u32 {
2156 return Err(HandleError{err: "Peer sent shutdown when we needed a channel_reestablish", action: Some(msgs::ErrorAction::SendErrorMessage{msg: msgs::ErrorMessage{data: "Peer sent shutdown when we needed a channel_reestablish".to_string(), channel_id: msg.channel_id}})});
2158 if self.channel_state < ChannelState::FundingSent as u32 {
2159 self.channel_state = ChannelState::ShutdownComplete as u32;
2160 self.channel_update_count += 1;
2161 return Ok((None, None, Vec::new()));
2163 for htlc in self.pending_inbound_htlcs.iter() {
2164 if let InboundHTLCState::RemoteAnnounced(_) = htlc.state {
2165 return Err(HandleError{err: "Got shutdown with remote pending HTLCs", action: None});
2168 if (self.channel_state & ChannelState::RemoteShutdownSent as u32) == ChannelState::RemoteShutdownSent as u32 {
2169 return Err(HandleError{err: "Remote peer sent duplicate shutdown message", action: None});
2171 assert_eq!(self.channel_state & ChannelState::ShutdownComplete as u32, 0);
2173 // BOLT 2 says we must only send a scriptpubkey of certain standard forms, which are up to
2174 // 34 bytes in length, so dont let the remote peer feed us some super fee-heavy script.
2175 if self.channel_outbound && msg.scriptpubkey.len() > 34 {
2176 return Err(HandleError{err: "Got shutdown_scriptpubkey of absurd length from remote peer", action: None});
2179 //Check shutdown_scriptpubkey form as BOLT says we must
2180 if !(msg.scriptpubkey.is_p2pkh()) && !(msg.scriptpubkey.is_p2sh())
2181 && !(msg.scriptpubkey.is_v0_p2wpkh()) && !(msg.scriptpubkey.is_v0_p2wsh()){
2182 return Err(HandleError{err: "Got an invalid scriptpubkey from remote peer", action: Some(msgs::ErrorAction::DisconnectPeer{ msg: None })});
2185 if self.their_shutdown_scriptpubkey.is_some() {
2186 if Some(&msg.scriptpubkey) != self.their_shutdown_scriptpubkey.as_ref() {
2187 return Err(HandleError{err: "Got shutdown request with a scriptpubkey which did not match their previous scriptpubkey", action: None});
2190 self.their_shutdown_scriptpubkey = Some(msg.scriptpubkey.clone());
2193 let our_closing_script = self.get_closing_scriptpubkey();
2195 let (proposed_feerate, proposed_fee, our_sig) = if self.channel_outbound && self.pending_inbound_htlcs.is_empty() && self.pending_outbound_htlcs.is_empty() {
2196 let mut proposed_feerate = fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Background);
2197 if self.feerate_per_kw > proposed_feerate {
2198 proposed_feerate = self.feerate_per_kw;
2200 let tx_weight = Self::get_closing_transaction_weight(&our_closing_script, &msg.scriptpubkey);
2201 let proposed_total_fee_satoshis = proposed_feerate * tx_weight / 1000;
2203 let (closing_tx, total_fee_satoshis) = self.build_closing_transaction(proposed_total_fee_satoshis, false);
2204 let funding_redeemscript = self.get_funding_redeemscript();
2205 let sighash = Message::from_slice(&bip143::SighashComponents::new(&closing_tx).sighash_all(&closing_tx.input[0], &funding_redeemscript, self.channel_value_satoshis)[..]).unwrap();
2207 (Some(proposed_feerate), Some(total_fee_satoshis), Some(self.secp_ctx.sign(&sighash, &self.local_keys.funding_key)))
2208 } else { (None, None, None) };
2210 // From here on out, we may not fail!
2212 self.channel_state |= ChannelState::RemoteShutdownSent as u32;
2213 self.channel_update_count += 1;
2215 // We can't send our shutdown until we've committed all of our pending HTLCs, but the
2216 // remote side is unlikely to accept any new HTLCs, so we go ahead and "free" any holding
2217 // cell HTLCs and return them to fail the payment.
2218 let mut dropped_outbound_htlcs = Vec::with_capacity(self.holding_cell_htlc_updates.len());
2219 self.holding_cell_htlc_updates.retain(|htlc_update| {
2221 &HTLCUpdateAwaitingACK::AddHTLC { ref payment_hash, ref source, .. } => {
2222 dropped_outbound_htlcs.push((source.clone(), payment_hash.clone()));
2228 for htlc in self.pending_outbound_htlcs.iter() {
2229 if let OutboundHTLCState::LocalAnnounced(_) = htlc.state {
2230 return Ok((None, None, dropped_outbound_htlcs));
2234 let our_shutdown = if (self.channel_state & ChannelState::LocalShutdownSent as u32) == ChannelState::LocalShutdownSent as u32 {
2237 Some(msgs::Shutdown {
2238 channel_id: self.channel_id,
2239 scriptpubkey: our_closing_script,
2243 self.channel_state |= ChannelState::LocalShutdownSent as u32;
2244 self.channel_update_count += 1;
2245 if self.pending_inbound_htlcs.is_empty() && self.pending_outbound_htlcs.is_empty() && self.channel_outbound {
2246 // There are no more HTLCs and we're the funder, this means we start the closing_signed
2247 // dance with an initial fee proposal!
2248 self.last_sent_closing_fee = Some((proposed_feerate.unwrap(), proposed_fee.unwrap()));
2249 Ok((our_shutdown, Some(msgs::ClosingSigned {
2250 channel_id: self.channel_id,
2251 fee_satoshis: proposed_fee.unwrap(),
2252 signature: our_sig.unwrap(),
2253 }), dropped_outbound_htlcs))
2255 Ok((our_shutdown, None, dropped_outbound_htlcs))
2259 pub fn closing_signed(&mut self, fee_estimator: &FeeEstimator, msg: &msgs::ClosingSigned) -> Result<(Option<msgs::ClosingSigned>, Option<Transaction>), HandleError> {
2260 if self.channel_state & BOTH_SIDES_SHUTDOWN_MASK != BOTH_SIDES_SHUTDOWN_MASK {
2261 return Err(HandleError{err: "Remote end sent us a closing_signed before both sides provided a shutdown", action: None});
2263 if self.channel_state & (ChannelState::PeerDisconnected as u32) == ChannelState::PeerDisconnected as u32 {
2264 return Err(HandleError{err: "Peer sent closing_signed when we needed a channel_reestablish", action: Some(msgs::ErrorAction::SendErrorMessage{msg: msgs::ErrorMessage{data: "Peer sent closing_signed when we needed a channel_reestablish".to_string(), channel_id: msg.channel_id}})});
2266 if !self.pending_inbound_htlcs.is_empty() || !self.pending_outbound_htlcs.is_empty() {
2267 return Err(HandleError{err: "Remote end sent us a closing_signed while there were still pending HTLCs", action: None});
2269 if msg.fee_satoshis > 21000000 * 10000000 { //this is required to stop potential overflow in build_closing_transaction
2270 return Err(HandleError{err: "Remote tried to send us a closing tx with > 21 million BTC fee", action: None});
2273 let funding_redeemscript = self.get_funding_redeemscript();
2274 let (mut closing_tx, used_total_fee) = self.build_closing_transaction(msg.fee_satoshis, false);
2275 if used_total_fee != msg.fee_satoshis {
2276 return Err(HandleError{err: "Remote sent us a closing_signed with a fee greater than the value they can claim", action: None});
2278 let mut sighash = Message::from_slice(&bip143::SighashComponents::new(&closing_tx).sighash_all(&closing_tx.input[0], &funding_redeemscript, self.channel_value_satoshis)[..]).unwrap();
2280 match self.secp_ctx.verify(&sighash, &msg.signature, &self.their_funding_pubkey.unwrap()) {
2283 // The remote end may have decided to revoke their output due to inconsistent dust
2284 // limits, so check for that case by re-checking the signature here.
2285 closing_tx = self.build_closing_transaction(msg.fee_satoshis, true).0;
2286 sighash = Message::from_slice(&bip143::SighashComponents::new(&closing_tx).sighash_all(&closing_tx.input[0], &funding_redeemscript, self.channel_value_satoshis)[..]).unwrap();
2287 secp_call!(self.secp_ctx.verify(&sighash, &msg.signature, &self.their_funding_pubkey.unwrap()), "Invalid closing tx signature from peer", self.channel_id());
2291 if let Some((_, last_fee)) = self.last_sent_closing_fee {
2292 if last_fee == msg.fee_satoshis {
2293 self.sign_commitment_transaction(&mut closing_tx, &msg.signature);
2294 self.channel_state = ChannelState::ShutdownComplete as u32;
2295 self.channel_update_count += 1;
2296 return Ok((None, Some(closing_tx)));
2300 macro_rules! propose_new_feerate {
2301 ($new_feerate: expr) => {
2302 let closing_tx_max_weight = Self::get_closing_transaction_weight(&self.get_closing_scriptpubkey(), self.their_shutdown_scriptpubkey.as_ref().unwrap());
2303 let (closing_tx, used_total_fee) = self.build_closing_transaction($new_feerate * closing_tx_max_weight / 1000, false);
2304 sighash = Message::from_slice(&bip143::SighashComponents::new(&closing_tx).sighash_all(&closing_tx.input[0], &funding_redeemscript, self.channel_value_satoshis)[..]).unwrap();
2305 let our_sig = self.secp_ctx.sign(&sighash, &self.local_keys.funding_key);
2306 self.last_sent_closing_fee = Some(($new_feerate, used_total_fee));
2307 return Ok((Some(msgs::ClosingSigned {
2308 channel_id: self.channel_id,
2309 fee_satoshis: used_total_fee,
2315 let proposed_sat_per_kw = msg.fee_satoshis * 1000 / closing_tx.get_weight();
2316 if self.channel_outbound {
2317 let our_max_feerate = fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Normal);
2318 if proposed_sat_per_kw > our_max_feerate {
2319 if let Some((last_feerate, _)) = self.last_sent_closing_fee {
2320 if our_max_feerate <= last_feerate {
2321 return Err(HandleError{err: "Unable to come to consensus about closing feerate, remote wanted something higher than our Normal feerate", action: None});
2324 propose_new_feerate!(our_max_feerate);
2327 let our_min_feerate = fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Background);
2328 if proposed_sat_per_kw < our_min_feerate {
2329 if let Some((last_feerate, _)) = self.last_sent_closing_fee {
2330 if our_min_feerate >= last_feerate {
2331 return Err(HandleError{err: "Unable to come to consensus about closing feerate, remote wanted something lower than our Background feerate", action: None});
2334 propose_new_feerate!(our_min_feerate);
2338 let our_sig = self.sign_commitment_transaction(&mut closing_tx, &msg.signature);
2339 self.channel_state = ChannelState::ShutdownComplete as u32;
2340 self.channel_update_count += 1;
2342 Ok((Some(msgs::ClosingSigned {
2343 channel_id: self.channel_id,
2344 fee_satoshis: msg.fee_satoshis,
2346 }), Some(closing_tx)))
2349 // Public utilities:
2351 pub fn channel_id(&self) -> [u8; 32] {
2355 /// Gets the "user_id" value passed into the construction of this channel. It has no special
2356 /// meaning and exists only to allow users to have a persistent identifier of a channel.
2357 pub fn get_user_id(&self) -> u64 {
2361 /// May only be called after funding has been initiated (ie is_funding_initiated() is true)
2362 pub fn channel_monitor(&self) -> ChannelMonitor {
2363 if self.channel_state < ChannelState::FundingCreated as u32 {
2364 panic!("Can't get a channel monitor until funding has been created");
2366 self.channel_monitor.clone()
2369 /// Guaranteed to be Some after both FundingLocked messages have been exchanged (and, thus,
2370 /// is_usable() returns true).
2371 /// Allowed in any state (including after shutdown)
2372 pub fn get_short_channel_id(&self) -> Option<u64> {
2373 self.short_channel_id
2376 /// Returns the funding_txo we either got from our peer, or were given by
2377 /// get_outbound_funding_created.
2378 pub fn get_funding_txo(&self) -> Option<OutPoint> {
2379 self.channel_monitor.get_funding_txo()
2382 /// Allowed in any state (including after shutdown)
2383 pub fn get_their_node_id(&self) -> PublicKey {
2387 /// Allowed in any state (including after shutdown)
2388 pub fn get_our_htlc_minimum_msat(&self) -> u64 {
2389 self.our_htlc_minimum_msat
2392 pub fn get_value_satoshis(&self) -> u64 {
2393 self.channel_value_satoshis
2397 pub fn get_feerate(&self) -> u64 {
2401 //TODO: Testing purpose only, should be changed in another way after #81
2403 pub fn get_local_keys(&self) -> &ChannelKeys {
2408 pub fn get_value_stat(&self) -> ChannelValueStat {
2410 value_to_self_msat: self.value_to_self_msat,
2411 channel_value_msat: self.channel_value_satoshis * 1000,
2412 channel_reserve_msat: self.their_channel_reserve_satoshis * 1000,
2413 pending_outbound_htlcs_amount_msat: self.pending_outbound_htlcs.iter().map(|ref h| h.amount_msat).sum::<u64>(),
2414 pending_inbound_htlcs_amount_msat: self.pending_inbound_htlcs.iter().map(|ref h| h.amount_msat).sum::<u64>(),
2415 holding_cell_outbound_amount_msat: {
2417 for h in self.holding_cell_htlc_updates.iter() {
2419 &HTLCUpdateAwaitingACK::AddHTLC{amount_msat, .. } => {
2427 their_max_htlc_value_in_flight_msat: self.their_max_htlc_value_in_flight_msat,
2431 /// Allowed in any state (including after shutdown)
2432 pub fn get_channel_update_count(&self) -> u32 {
2433 self.channel_update_count
2436 pub fn should_announce(&self) -> bool {
2437 self.announce_publicly
2440 pub fn is_outbound(&self) -> bool {
2441 self.channel_outbound
2444 /// Gets the fee we'd want to charge for adding an HTLC output to this Channel
2445 /// Allowed in any state (including after shutdown)
2446 pub fn get_our_fee_base_msat(&self, fee_estimator: &FeeEstimator) -> u32 {
2447 // For lack of a better metric, we calculate what it would cost to consolidate the new HTLC
2448 // output value back into a transaction with the regular channel output:
2450 // the fee cost of the HTLC-Success/HTLC-Timeout transaction:
2451 let mut res = self.feerate_per_kw * cmp::max(HTLC_TIMEOUT_TX_WEIGHT, HTLC_SUCCESS_TX_WEIGHT) / 1000;
2453 if self.channel_outbound {
2454 // + the marginal fee increase cost to us in the commitment transaction:
2455 res += self.feerate_per_kw * COMMITMENT_TX_WEIGHT_PER_HTLC / 1000;
2458 // + the marginal cost of an input which spends the HTLC-Success/HTLC-Timeout output:
2459 res += fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Normal) * SPENDING_INPUT_FOR_A_OUTPUT_WEIGHT / 1000;
2464 /// Returns true if we've ever received a message from the remote end for this Channel
2465 pub fn have_received_message(&self) -> bool {
2466 self.channel_state > (ChannelState::OurInitSent as u32)
2469 /// Returns true if this channel is fully established and not known to be closing.
2470 /// Allowed in any state (including after shutdown)
2471 pub fn is_usable(&self) -> bool {
2472 let mask = ChannelState::ChannelFunded as u32 | BOTH_SIDES_SHUTDOWN_MASK;
2473 (self.channel_state & mask) == (ChannelState::ChannelFunded as u32)
2476 /// Returns true if this channel is currently available for use. This is a superset of
2477 /// is_usable() and considers things like the channel being temporarily disabled.
2478 /// Allowed in any state (including after shutdown)
2479 pub fn is_live(&self) -> bool {
2480 self.is_usable() && (self.channel_state & (ChannelState::PeerDisconnected as u32) == 0)
2483 /// Returns true if funding_created was sent/received.
2484 pub fn is_funding_initiated(&self) -> bool {
2485 self.channel_state >= ChannelState::FundingCreated as u32
2488 /// Returns true if this channel is fully shut down. True here implies that no further actions
2489 /// may/will be taken on this channel, and thus this object should be freed. Any future changes
2490 /// will be handled appropriately by the chain monitor.
2491 pub fn is_shutdown(&self) -> bool {
2492 if (self.channel_state & ChannelState::ShutdownComplete as u32) == ChannelState::ShutdownComplete as u32 {
2493 assert!(self.channel_state == ChannelState::ShutdownComplete as u32);
2498 /// Called by channelmanager based on chain blocks being connected.
2499 /// Note that we only need to use this to detect funding_signed, anything else is handled by
2500 /// the channel_monitor.
2501 /// In case of Err, the channel may have been closed, at which point the standard requirements
2502 /// apply - no calls may be made except those explicitly stated to be allowed post-shutdown.
2503 /// Only returns an ErrorAction of DisconnectPeer, if Err.
2504 pub fn block_connected(&mut self, header: &BlockHeader, height: u32, txn_matched: &[&Transaction], indexes_of_txn_matched: &[u32]) -> Result<Option<msgs::FundingLocked>, HandleError> {
2505 let non_shutdown_state = self.channel_state & (!BOTH_SIDES_SHUTDOWN_MASK);
2506 if self.funding_tx_confirmations > 0 {
2507 if header.bitcoin_hash() != self.last_block_connected {
2508 self.last_block_connected = header.bitcoin_hash();
2509 self.funding_tx_confirmations += 1;
2510 if self.funding_tx_confirmations == Channel::derive_minimum_depth(self.channel_value_satoshis*1000, self.value_to_self_msat) as u64 {
2511 let need_commitment_update = if non_shutdown_state == ChannelState::FundingSent as u32 {
2512 self.channel_state |= ChannelState::OurFundingLocked as u32;
2514 } else if non_shutdown_state == (ChannelState::FundingSent as u32 | ChannelState::TheirFundingLocked as u32) {
2515 self.channel_state = ChannelState::ChannelFunded as u32 | (self.channel_state & BOTH_SIDES_SHUTDOWN_MASK);
2516 self.channel_update_count += 1;
2518 } else if self.channel_state == (ChannelState::FundingSent as u32 | ChannelState::OurFundingLocked as u32) {
2519 // We got a reorg but not enough to trigger a force close, just update
2520 // funding_tx_confirmed_in and return.
2522 } else if self.channel_state < ChannelState::ChannelFunded as u32 {
2523 panic!("Started confirming a channel in a state pre-FundingSent?: {}", self.channel_state);
2525 // We got a reorg but not enough to trigger a force close, just update
2526 // funding_tx_confirmed_in and return.
2529 self.funding_tx_confirmed_in = Some(header.bitcoin_hash());
2531 //TODO: Note that this must be a duplicate of the previous commitment point they sent us,
2532 //as otherwise we will have a commitment transaction that they can't revoke (well, kinda,
2533 //they can by sending two revoke_and_acks back-to-back, but not really). This appears to be
2534 //a protocol oversight, but I assume I'm just missing something.
2535 if need_commitment_update {
2536 let next_per_commitment_secret = self.build_local_commitment_secret(self.cur_local_commitment_transaction_number);
2537 let next_per_commitment_point = PublicKey::from_secret_key(&self.secp_ctx, &next_per_commitment_secret);
2538 return Ok(Some(msgs::FundingLocked {
2539 channel_id: self.channel_id,
2540 next_per_commitment_point: next_per_commitment_point,
2546 if non_shutdown_state & !(ChannelState::TheirFundingLocked as u32) == ChannelState::FundingSent as u32 {
2547 for (ref tx, index_in_block) in txn_matched.iter().zip(indexes_of_txn_matched) {
2548 if tx.txid() == self.channel_monitor.get_funding_txo().unwrap().txid {
2549 let txo_idx = self.channel_monitor.get_funding_txo().unwrap().index as usize;
2550 if txo_idx >= tx.output.len() || tx.output[txo_idx].script_pubkey != self.get_funding_redeemscript().to_v0_p2wsh() ||
2551 tx.output[txo_idx].value != self.channel_value_satoshis {
2552 if self.channel_outbound {
2553 // If we generated the funding transaction and it doesn't match what it
2554 // should, the client is really broken and we should just panic and
2555 // tell them off. That said, because hash collisions happen with high
2556 // probability in fuzztarget mode, if we're fuzzing we just close the
2557 // channel and move on.
2558 #[cfg(not(feature = "fuzztarget"))]
2559 panic!("Client called ChannelManager::funding_transaction_generated with bogus transaction!");
2561 self.channel_state = ChannelState::ShutdownComplete as u32;
2562 self.channel_update_count += 1;
2563 return Err(HandleError{err: "funding tx had wrong script/value", action: Some(ErrorAction::DisconnectPeer{msg: None})});
2565 self.funding_tx_confirmations = 1;
2566 self.short_channel_id = Some(((height as u64) << (5*8)) |
2567 ((*index_in_block as u64) << (2*8)) |
2568 ((txo_idx as u64) << (0*8)));
2576 /// Called by channelmanager based on chain blocks being disconnected.
2577 /// Returns true if we need to close the channel now due to funding transaction
2578 /// unconfirmation/reorg.
2579 pub fn block_disconnected(&mut self, header: &BlockHeader) -> bool {
2580 if self.funding_tx_confirmations > 0 {
2581 self.funding_tx_confirmations -= 1;
2582 if self.funding_tx_confirmations == UNCONF_THRESHOLD as u64 {
2586 if Some(header.bitcoin_hash()) == self.funding_tx_confirmed_in {
2587 self.funding_tx_confirmations = Channel::derive_minimum_depth(self.channel_value_satoshis*1000, self.value_to_self_msat) as u64 - 1;
2592 // Methods to get unprompted messages to send to the remote end (or where we already returned
2593 // something in the handler for the message that prompted this message):
2595 pub fn get_open_channel(&self, chain_hash: Sha256dHash, fee_estimator: &FeeEstimator) -> msgs::OpenChannel {
2596 if !self.channel_outbound {
2597 panic!("Tried to open a channel for an inbound channel?");
2599 if self.channel_state != ChannelState::OurInitSent as u32 {
2600 panic!("Cannot generate an open_channel after we've moved forward");
2603 if self.cur_local_commitment_transaction_number != INITIAL_COMMITMENT_NUMBER {
2604 panic!("Tried to send an open_channel for a channel that has already advanced");
2607 let local_commitment_secret = self.build_local_commitment_secret(self.cur_local_commitment_transaction_number);
2610 chain_hash: chain_hash,
2611 temporary_channel_id: self.channel_id,
2612 funding_satoshis: self.channel_value_satoshis,
2613 push_msat: self.channel_value_satoshis * 1000 - self.value_to_self_msat,
2614 dust_limit_satoshis: self.our_dust_limit_satoshis,
2615 max_htlc_value_in_flight_msat: Channel::get_our_max_htlc_value_in_flight_msat(self.channel_value_satoshis),
2616 channel_reserve_satoshis: Channel::get_our_channel_reserve_satoshis(self.channel_value_satoshis),
2617 htlc_minimum_msat: self.our_htlc_minimum_msat,
2618 feerate_per_kw: fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Background) as u32,
2619 to_self_delay: BREAKDOWN_TIMEOUT,
2620 max_accepted_htlcs: OUR_MAX_HTLCS,
2621 funding_pubkey: PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.funding_key),
2622 revocation_basepoint: PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.revocation_base_key),
2623 payment_basepoint: PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.payment_base_key),
2624 delayed_payment_basepoint: PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.delayed_payment_base_key),
2625 htlc_basepoint: PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.htlc_base_key),
2626 first_per_commitment_point: PublicKey::from_secret_key(&self.secp_ctx, &local_commitment_secret),
2627 channel_flags: if self.announce_publicly {1} else {0},
2628 shutdown_scriptpubkey: None,
2632 pub fn get_accept_channel(&self) -> msgs::AcceptChannel {
2633 if self.channel_outbound {
2634 panic!("Tried to send accept_channel for an outbound channel?");
2636 if self.channel_state != (ChannelState::OurInitSent as u32) | (ChannelState::TheirInitSent as u32) {
2637 panic!("Tried to send accept_channel after channel had moved forward");
2639 if self.cur_local_commitment_transaction_number != INITIAL_COMMITMENT_NUMBER {
2640 panic!("Tried to send an accept_channel for a channel that has already advanced");
2643 let local_commitment_secret = self.build_local_commitment_secret(self.cur_local_commitment_transaction_number);
2645 msgs::AcceptChannel {
2646 temporary_channel_id: self.channel_id,
2647 dust_limit_satoshis: self.our_dust_limit_satoshis,
2648 max_htlc_value_in_flight_msat: Channel::get_our_max_htlc_value_in_flight_msat(self.channel_value_satoshis),
2649 channel_reserve_satoshis: Channel::get_our_channel_reserve_satoshis(self.channel_value_satoshis),
2650 htlc_minimum_msat: self.our_htlc_minimum_msat,
2651 minimum_depth: Channel::derive_minimum_depth(self.channel_value_satoshis*1000, self.value_to_self_msat),
2652 to_self_delay: BREAKDOWN_TIMEOUT,
2653 max_accepted_htlcs: OUR_MAX_HTLCS,
2654 funding_pubkey: PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.funding_key),
2655 revocation_basepoint: PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.revocation_base_key),
2656 payment_basepoint: PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.payment_base_key),
2657 delayed_payment_basepoint: PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.delayed_payment_base_key),
2658 htlc_basepoint: PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.htlc_base_key),
2659 first_per_commitment_point: PublicKey::from_secret_key(&self.secp_ctx, &local_commitment_secret),
2660 shutdown_scriptpubkey: None,
2664 fn get_outbound_funding_created_signature(&mut self) -> Result<(Signature, Transaction), HandleError> {
2665 let funding_script = self.get_funding_redeemscript();
2667 let remote_keys = self.build_remote_transaction_keys()?;
2668 let remote_initial_commitment_tx = self.build_commitment_transaction(self.cur_remote_commitment_transaction_number, &remote_keys, false, false, self.feerate_per_kw).0;
2669 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();
2671 // We sign the "remote" commitment transaction, allowing them to broadcast the tx if they wish.
2672 Ok((self.secp_ctx.sign(&remote_sighash, &self.local_keys.funding_key), remote_initial_commitment_tx))
2675 /// Updates channel state with knowledge of the funding transaction's txid/index, and generates
2676 /// a funding_created message for the remote peer.
2677 /// Panics if called at some time other than immediately after initial handshake, if called twice,
2678 /// or if called on an inbound channel.
2679 /// Note that channel_id changes during this call!
2680 /// Do NOT broadcast the funding transaction until after a successful funding_signed call!
2681 pub fn get_outbound_funding_created(&mut self, funding_txo: OutPoint) -> Result<(msgs::FundingCreated, ChannelMonitor), HandleError> {
2682 if !self.channel_outbound {
2683 panic!("Tried to create outbound funding_created message on an inbound channel!");
2685 if self.channel_state != (ChannelState::OurInitSent as u32 | ChannelState::TheirInitSent as u32) {
2686 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)");
2688 if self.channel_monitor.get_min_seen_secret() != (1 << 48) ||
2689 self.cur_remote_commitment_transaction_number != INITIAL_COMMITMENT_NUMBER ||
2690 self.cur_local_commitment_transaction_number != INITIAL_COMMITMENT_NUMBER {
2691 panic!("Should not have advanced channel commitment tx numbers prior to funding_created");
2694 let funding_txo_script = self.get_funding_redeemscript().to_v0_p2wsh();
2695 self.channel_monitor.set_funding_info((funding_txo, funding_txo_script));
2697 let (our_signature, commitment_tx) = match self.get_outbound_funding_created_signature() {
2700 log_error!(self, "Got bad signatures: {}!", e.err);
2701 self.channel_monitor.unset_funding_info();
2706 let temporary_channel_id = self.channel_id;
2708 // Now that we're past error-generating stuff, update our local state:
2709 self.channel_monitor.provide_latest_remote_commitment_tx_info(&commitment_tx, Vec::new(), self.cur_remote_commitment_transaction_number);
2710 self.channel_state = ChannelState::FundingCreated as u32;
2711 self.channel_id = funding_txo.to_channel_id();
2712 self.cur_remote_commitment_transaction_number -= 1;
2714 Ok((msgs::FundingCreated {
2715 temporary_channel_id: temporary_channel_id,
2716 funding_txid: funding_txo.txid,
2717 funding_output_index: funding_txo.index,
2718 signature: our_signature
2719 }, self.channel_monitor.clone()))
2722 /// Gets an UnsignedChannelAnnouncement, as well as a signature covering it using our
2723 /// bitcoin_key, if available, for this channel. The channel must be publicly announceable and
2724 /// available for use (have exchanged FundingLocked messages in both directions). Should be used
2725 /// for both loose and in response to an AnnouncementSignatures message from the remote peer.
2726 /// Will only fail if we're not in a state where channel_announcement may be sent (including
2728 /// Note that the "channel must be funded" requirement is stricter than BOLT 7 requires - see
2729 /// https://github.com/lightningnetwork/lightning-rfc/issues/468
2730 pub fn get_channel_announcement(&self, our_node_id: PublicKey, chain_hash: Sha256dHash) -> Result<(msgs::UnsignedChannelAnnouncement, Signature), ChannelError> {
2731 if !self.announce_publicly {
2732 return Err(ChannelError::Ignore("Channel is not available for public announcements"));
2734 if self.channel_state & (ChannelState::ChannelFunded as u32) == 0 {
2735 return Err(ChannelError::Ignore("Cannot get a ChannelAnnouncement until the channel funding has been locked"));
2737 if (self.channel_state & (ChannelState::LocalShutdownSent as u32 | ChannelState::ShutdownComplete as u32)) != 0 {
2738 return Err(ChannelError::Ignore("Cannot get a ChannelAnnouncement once the channel is closing"));
2741 let were_node_one = our_node_id.serialize()[..] < self.their_node_id.serialize()[..];
2742 let our_bitcoin_key = PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.funding_key);
2744 let msg = msgs::UnsignedChannelAnnouncement {
2745 features: msgs::GlobalFeatures::new(),
2746 chain_hash: chain_hash,
2747 short_channel_id: self.get_short_channel_id().unwrap(),
2748 node_id_1: if were_node_one { our_node_id } else { self.get_their_node_id() },
2749 node_id_2: if were_node_one { self.get_their_node_id() } else { our_node_id },
2750 bitcoin_key_1: if were_node_one { our_bitcoin_key } else { self.their_funding_pubkey.unwrap() },
2751 bitcoin_key_2: if were_node_one { self.their_funding_pubkey.unwrap() } else { our_bitcoin_key },
2752 excess_data: Vec::new(),
2755 let msghash = Message::from_slice(&Sha256dHash::from_data(&msg.encode()[..])[..]).unwrap();
2756 let sig = self.secp_ctx.sign(&msghash, &self.local_keys.funding_key);
2761 /// May panic if called on a channel that wasn't immediately-previously
2762 /// self.remove_uncommitted_htlcs_and_mark_paused()'d
2763 pub fn get_channel_reestablish(&self) -> msgs::ChannelReestablish {
2764 assert_eq!(self.channel_state & ChannelState::PeerDisconnected as u32, ChannelState::PeerDisconnected as u32);
2765 msgs::ChannelReestablish {
2766 channel_id: self.channel_id(),
2767 next_local_commitment_number: INITIAL_COMMITMENT_NUMBER - self.cur_local_commitment_transaction_number,
2768 next_remote_commitment_number: INITIAL_COMMITMENT_NUMBER - self.cur_remote_commitment_transaction_number,
2769 data_loss_protect: None,
2774 // Send stuff to our remote peers:
2776 /// Adds a pending outbound HTLC to this channel, note that you probably want
2777 /// send_htlc_and_commit instead cause you'll want both messages at once.
2778 /// This returns an option instead of a pure UpdateAddHTLC as we may be in a state where we are
2779 /// waiting on the remote peer to send us a revoke_and_ack during which time we cannot add new
2780 /// HTLCs on the wire or we wouldn't be able to determine what they actually ACK'ed.
2781 /// You MUST call send_commitment prior to any other calls on this Channel
2782 pub fn send_htlc(&mut self, amount_msat: u64, payment_hash: [u8; 32], cltv_expiry: u32, source: HTLCSource, onion_routing_packet: msgs::OnionPacket) -> Result<Option<msgs::UpdateAddHTLC>, HandleError> {
2783 if (self.channel_state & (ChannelState::ChannelFunded as u32 | BOTH_SIDES_SHUTDOWN_MASK)) != (ChannelState::ChannelFunded as u32) {
2784 return Err(HandleError{err: "Cannot send HTLC until channel is fully established and we haven't started shutting down", action: None});
2787 if amount_msat > self.channel_value_satoshis * 1000 {
2788 return Err(HandleError{err: "Cannot send more than the total value of the channel", action: None});
2790 if amount_msat < self.their_htlc_minimum_msat {
2791 return Err(HandleError{err: "Cannot send less than their minimum HTLC value", action: None});
2794 if (self.channel_state & (ChannelState::PeerDisconnected as u32)) == (ChannelState::PeerDisconnected as u32) {
2795 // Note that this should never really happen, if we're !is_live() on receipt of an
2796 // incoming HTLC for relay will result in us rejecting the HTLC and we won't allow
2797 // the user to send directly into a !is_live() channel. However, if we
2798 // disconnected during the time the previous hop was doing the commitment dance we may
2799 // end up getting here after the forwarding delay. In any case, returning an
2800 // IgnoreError will get ChannelManager to do the right thing and fail backwards now.
2801 return Err(HandleError{err: "Cannot send an HTLC while disconnected", action: Some(ErrorAction::IgnoreError)});
2804 let (outbound_htlc_count, htlc_outbound_value_msat) = self.get_outbound_pending_htlc_stats();
2805 if outbound_htlc_count + 1 > self.their_max_accepted_htlcs as u32 {
2806 return Err(HandleError{err: "Cannot push more than their max accepted HTLCs", action: None});
2808 //TODO: Spec is unclear if this is per-direction or in total (I assume per direction):
2809 // Check their_max_htlc_value_in_flight_msat
2810 if htlc_outbound_value_msat + amount_msat > self.their_max_htlc_value_in_flight_msat {
2811 return Err(HandleError{err: "Cannot send value that would put us over our max HTLC value in flight", action: None});
2814 let mut holding_cell_outbound_amount_msat = 0;
2815 for holding_htlc in self.holding_cell_htlc_updates.iter() {
2816 match holding_htlc {
2817 &HTLCUpdateAwaitingACK::AddHTLC { ref amount_msat, .. } => {
2818 holding_cell_outbound_amount_msat += *amount_msat;
2824 // Check self.their_channel_reserve_satoshis (the amount we must keep as
2825 // reserve for them to have something to claim if we misbehave)
2826 if self.value_to_self_msat < self.their_channel_reserve_satoshis * 1000 + amount_msat + holding_cell_outbound_amount_msat + htlc_outbound_value_msat {
2827 return Err(HandleError{err: "Cannot send value that would put us over our reserve value", action: None});
2830 //TODO: Check cltv_expiry? Do this in channel manager?
2832 // Now update local state:
2833 if (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32)) == (ChannelState::AwaitingRemoteRevoke as u32) {
2834 //TODO: Check the limits *including* other pending holding cell HTLCs!
2835 self.holding_cell_htlc_updates.push(HTLCUpdateAwaitingACK::AddHTLC {
2836 amount_msat: amount_msat,
2837 payment_hash: payment_hash,
2838 cltv_expiry: cltv_expiry,
2840 onion_routing_packet: onion_routing_packet,
2841 time_created: Instant::now(),
2846 self.pending_outbound_htlcs.push(OutboundHTLCOutput {
2847 htlc_id: self.next_local_htlc_id,
2848 amount_msat: amount_msat,
2849 payment_hash: payment_hash.clone(),
2850 cltv_expiry: cltv_expiry,
2851 state: OutboundHTLCState::LocalAnnounced(Box::new(onion_routing_packet.clone())),
2856 let res = msgs::UpdateAddHTLC {
2857 channel_id: self.channel_id,
2858 htlc_id: self.next_local_htlc_id,
2859 amount_msat: amount_msat,
2860 payment_hash: payment_hash,
2861 cltv_expiry: cltv_expiry,
2862 onion_routing_packet: onion_routing_packet,
2864 self.next_local_htlc_id += 1;
2869 /// Creates a signed commitment transaction to send to the remote peer.
2870 /// Always returns a Channel-failing HandleError::action if an immediately-preceding (read: the
2871 /// last call to this Channel) send_htlc returned Ok(Some(_)) and there is an Err.
2872 /// May panic if called except immediately after a successful, Ok(Some(_))-returning send_htlc.
2873 pub fn send_commitment(&mut self) -> Result<(msgs::CommitmentSigned, ChannelMonitor), HandleError> {
2874 if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
2875 panic!("Cannot create commitment tx until channel is fully established");
2877 if (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32)) == (ChannelState::AwaitingRemoteRevoke as u32) {
2878 panic!("Cannot create commitment tx until remote revokes their previous commitment");
2880 if (self.channel_state & (ChannelState::PeerDisconnected as u32)) == (ChannelState::PeerDisconnected as u32) {
2881 panic!("Cannot create commitment tx while disconnected, as send_htlc will have returned an Err so a send_commitment precondition has been violated");
2883 let mut have_updates = self.pending_update_fee.is_some();
2884 for htlc in self.pending_outbound_htlcs.iter() {
2885 if let OutboundHTLCState::LocalAnnounced(_) = htlc.state {
2886 have_updates = true;
2888 if have_updates { break; }
2891 panic!("Cannot create commitment tx until we have some updates to send");
2893 self.send_commitment_no_status_check()
2895 /// Only fails in case of bad keys
2896 fn send_commitment_no_status_check(&mut self) -> Result<(msgs::CommitmentSigned, ChannelMonitor), HandleError> {
2897 // We can upgrade the status of some HTLCs that are waiting on a commitment, even if we
2898 // fail to generate this, we still are at least at a position where upgrading their status
2900 for htlc in self.pending_inbound_htlcs.iter_mut() {
2901 let new_state = if let &InboundHTLCState::AwaitingRemoteRevokeToAnnounce(ref forward_info) = &htlc.state {
2902 Some(InboundHTLCState::AwaitingAnnouncedRemoteRevoke(forward_info.clone()))
2904 if let Some(state) = new_state {
2908 for htlc in self.pending_outbound_htlcs.iter_mut() {
2909 if let OutboundHTLCState::AwaitingRemoteRevokeToRemove = htlc.state {
2910 htlc.state = OutboundHTLCState::AwaitingRemovedRemoteRevoke;
2914 match self.send_commitment_no_state_update() {
2915 Ok((res, remote_commitment_tx)) => {
2916 // Update state now that we've passed all the can-fail calls...
2917 self.channel_monitor.provide_latest_remote_commitment_tx_info(&remote_commitment_tx.0, remote_commitment_tx.1, self.cur_remote_commitment_transaction_number);
2918 self.channel_state |= ChannelState::AwaitingRemoteRevoke as u32;
2919 Ok((res, self.channel_monitor.clone()))
2925 /// Only fails in case of bad keys. Used for channel_reestablish commitment_signed generation
2926 /// when we shouldn't change HTLC/channel state.
2927 fn send_commitment_no_state_update(&self) -> Result<(msgs::CommitmentSigned, (Transaction, Vec<HTLCOutputInCommitment>)), HandleError> {
2928 let funding_script = self.get_funding_redeemscript();
2930 let mut feerate_per_kw = self.feerate_per_kw;
2931 if let Some(feerate) = self.pending_update_fee {
2932 if self.channel_outbound {
2933 feerate_per_kw = feerate;
2937 let remote_keys = self.build_remote_transaction_keys()?;
2938 let remote_commitment_tx = self.build_commitment_transaction(self.cur_remote_commitment_transaction_number, &remote_keys, false, true, feerate_per_kw);
2939 let remote_commitment_txid = remote_commitment_tx.0.txid();
2940 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();
2941 let our_sig = self.secp_ctx.sign(&remote_sighash, &self.local_keys.funding_key);
2943 let mut htlc_sigs = Vec::new();
2945 for ref htlc in remote_commitment_tx.1.iter() {
2946 let htlc_tx = self.build_htlc_transaction(&remote_commitment_txid, htlc, false, &remote_keys, feerate_per_kw);
2947 let htlc_redeemscript = chan_utils::get_htlc_redeemscript(&htlc, &remote_keys);
2948 let htlc_sighash = Message::from_slice(&bip143::SighashComponents::new(&htlc_tx).sighash_all(&htlc_tx.input[0], &htlc_redeemscript, htlc.amount_msat / 1000)[..]).unwrap();
2949 let our_htlc_key = secp_derived_key!(chan_utils::derive_private_key(&self.secp_ctx, &remote_keys.per_commitment_point, &self.local_keys.htlc_base_key), self.channel_id());
2950 htlc_sigs.push(self.secp_ctx.sign(&htlc_sighash, &our_htlc_key));
2953 Ok((msgs::CommitmentSigned {
2954 channel_id: self.channel_id,
2956 htlc_signatures: htlc_sigs,
2957 }, remote_commitment_tx))
2960 /// Adds a pending outbound HTLC to this channel, and creates a signed commitment transaction
2961 /// to send to the remote peer in one go.
2962 /// Shorthand for calling send_htlc() followed by send_commitment(), see docs on those for
2964 pub fn send_htlc_and_commit(&mut self, amount_msat: u64, payment_hash: [u8; 32], cltv_expiry: u32, source: HTLCSource, onion_routing_packet: msgs::OnionPacket) -> Result<Option<(msgs::UpdateAddHTLC, msgs::CommitmentSigned, ChannelMonitor)>, HandleError> {
2965 match self.send_htlc(amount_msat, payment_hash, cltv_expiry, source, onion_routing_packet)? {
2966 Some(update_add_htlc) => {
2967 let (commitment_signed, monitor_update) = self.send_commitment_no_status_check()?;
2968 Ok(Some((update_add_htlc, commitment_signed, monitor_update)))
2974 /// Begins the shutdown process, getting a message for the remote peer and returning all
2975 /// holding cell HTLCs for payment failure.
2976 pub fn get_shutdown(&mut self) -> Result<(msgs::Shutdown, Vec<(HTLCSource, [u8; 32])>), APIError> {
2977 for htlc in self.pending_outbound_htlcs.iter() {
2978 if let OutboundHTLCState::LocalAnnounced(_) = htlc.state {
2979 return Err(APIError::APIMisuseError{err: "Cannot begin shutdown with pending HTLCs. Process pending events first"});
2982 if self.channel_state & BOTH_SIDES_SHUTDOWN_MASK != 0 {
2983 if (self.channel_state & ChannelState::LocalShutdownSent as u32) == ChannelState::LocalShutdownSent as u32 {
2984 return Err(APIError::APIMisuseError{err: "Shutdown already in progress"});
2986 else if (self.channel_state & ChannelState::RemoteShutdownSent as u32) == ChannelState::RemoteShutdownSent as u32 {
2987 return Err(APIError::ChannelUnavailable{err: "Shutdown already in progress by remote"});
2990 assert_eq!(self.channel_state & ChannelState::ShutdownComplete as u32, 0);
2991 if self.channel_state & (ChannelState::PeerDisconnected as u32) == ChannelState::PeerDisconnected as u32 {
2992 return Err(APIError::ChannelUnavailable{err: "Cannot begin shutdown while peer is disconnected, maybe force-close instead?"});
2995 let our_closing_script = self.get_closing_scriptpubkey();
2997 // From here on out, we may not fail!
2998 if self.channel_state < ChannelState::FundingSent as u32 {
2999 self.channel_state = ChannelState::ShutdownComplete as u32;
3001 self.channel_state |= ChannelState::LocalShutdownSent as u32;
3003 self.channel_update_count += 1;
3005 // We can't send our shutdown until we've committed all of our pending HTLCs, but the
3006 // remote side is unlikely to accept any new HTLCs, so we go ahead and "free" any holding
3007 // cell HTLCs and return them to fail the payment.
3008 let mut dropped_outbound_htlcs = Vec::with_capacity(self.holding_cell_htlc_updates.len());
3009 self.holding_cell_htlc_updates.retain(|htlc_update| {
3011 &HTLCUpdateAwaitingACK::AddHTLC { ref payment_hash, ref source, .. } => {
3012 dropped_outbound_htlcs.push((source.clone(), payment_hash.clone()));
3019 Ok((msgs::Shutdown {
3020 channel_id: self.channel_id,
3021 scriptpubkey: our_closing_script,
3022 }, dropped_outbound_htlcs))
3025 /// Gets the latest commitment transaction and any dependant transactions for relay (forcing
3026 /// shutdown of this channel - no more calls into this Channel may be made afterwards except
3027 /// those explicitly stated to be allowed after shutdown completes, eg some simple getters).
3028 /// Also returns the list of payment_hashes for channels which we can safely fail backwards
3029 /// immediately (others we will have to allow to time out).
3030 pub fn force_shutdown(&mut self) -> (Vec<Transaction>, Vec<(HTLCSource, [u8; 32])>) {
3031 assert!(self.channel_state != ChannelState::ShutdownComplete as u32);
3033 // We go ahead and "free" any holding cell HTLCs or HTLCs we haven't yet committed to and
3034 // return them to fail the payment.
3035 let mut dropped_outbound_htlcs = Vec::with_capacity(self.holding_cell_htlc_updates.len());
3036 for htlc_update in self.holding_cell_htlc_updates.drain(..) {
3038 HTLCUpdateAwaitingACK::AddHTLC { source, payment_hash, .. } => {
3039 dropped_outbound_htlcs.push((source, payment_hash));
3045 for _htlc in self.pending_outbound_htlcs.drain(..) {
3046 //TODO: Do something with the remaining HTLCs
3047 //(we need to have the ChannelManager monitor them so we can claim the inbound HTLCs
3051 self.channel_state = ChannelState::ShutdownComplete as u32;
3052 self.channel_update_count += 1;
3053 let mut res = Vec::new();
3054 mem::swap(&mut res, &mut self.last_local_commitment_txn);
3055 (res, dropped_outbound_htlcs)
3061 use bitcoin::util::hash::Sha256dHash;
3062 use bitcoin::util::bip143;
3063 use bitcoin::network::serialize::serialize;
3064 use bitcoin::blockdata::script::Script;
3065 use bitcoin::blockdata::transaction::Transaction;
3067 use ln::channelmanager::HTLCSource;
3068 use ln::channel::{Channel,ChannelKeys,InboundHTLCOutput,OutboundHTLCOutput,InboundHTLCState,OutboundHTLCState,HTLCOutputInCommitment,TxCreationKeys};
3069 use ln::channel::MAX_FUNDING_SATOSHIS;
3071 use chain::chaininterface::{FeeEstimator,ConfirmationTarget};
3072 use chain::transaction::OutPoint;
3073 use util::test_utils;
3074 use util::logger::Logger;
3075 use secp256k1::{Secp256k1,Message,Signature};
3076 use secp256k1::key::{SecretKey,PublicKey};
3077 use crypto::sha2::Sha256;
3078 use crypto::digest::Digest;
3081 struct TestFeeEstimator {
3084 impl FeeEstimator for TestFeeEstimator {
3085 fn get_est_sat_per_1000_weight(&self, _: ConfirmationTarget) -> u64 {
3091 fn test_max_funding_satoshis() {
3092 assert!(MAX_FUNDING_SATOSHIS <= 21_000_000 * 100_000_000,
3093 "MAX_FUNDING_SATOSHIS is greater than all satoshis on existence");
3097 fn outbound_commitment_test() {
3098 // Test vectors from BOLT 3 Appendix C:
3099 let feeest = TestFeeEstimator{fee_est: 15000};
3100 let logger : Arc<Logger> = Arc::new(test_utils::TestLogger::new());
3101 let secp_ctx = Secp256k1::new();
3103 let chan_keys = ChannelKeys {
3104 funding_key: SecretKey::from_slice(&secp_ctx, &hex::decode("30ff4956bbdd3222d44cc5e8a1261dab1e07957bdac5ae88fe3261ef321f3749").unwrap()[..]).unwrap(),
3105 payment_base_key: SecretKey::from_slice(&secp_ctx, &hex::decode("1111111111111111111111111111111111111111111111111111111111111111").unwrap()[..]).unwrap(),
3106 delayed_payment_base_key: SecretKey::from_slice(&secp_ctx, &hex::decode("3333333333333333333333333333333333333333333333333333333333333333").unwrap()[..]).unwrap(),
3107 htlc_base_key: SecretKey::from_slice(&secp_ctx, &hex::decode("1111111111111111111111111111111111111111111111111111111111111111").unwrap()[..]).unwrap(),
3109 // These aren't set in the test vectors:
3110 revocation_base_key: SecretKey::from_slice(&secp_ctx, &hex::decode("0fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff").unwrap()[..]).unwrap(),
3111 channel_close_key: SecretKey::from_slice(&secp_ctx, &hex::decode("0fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff").unwrap()[..]).unwrap(),
3112 channel_monitor_claim_key: SecretKey::from_slice(&secp_ctx, &hex::decode("0fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff").unwrap()[..]).unwrap(),
3113 commitment_seed: [0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff],
3115 assert_eq!(PublicKey::from_secret_key(&secp_ctx, &chan_keys.funding_key).serialize()[..],
3116 hex::decode("023da092f6980e58d2c037173180e9a465476026ee50f96695963e8efe436f54eb").unwrap()[..]);
3118 let their_node_id = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&secp_ctx, &[42; 32]).unwrap());
3119 let mut chan = Channel::new_outbound(&feeest, chan_keys, their_node_id, 10000000, 100000, false, 42, Arc::clone(&logger)).unwrap(); // Nothing uses their network key in this test
3120 chan.their_to_self_delay = 144;
3121 chan.our_dust_limit_satoshis = 546;
3123 let funding_info = OutPoint::new(Sha256dHash::from_hex("8984484a580b825b9972d7adb15050b3ab624ccd731946b3eeddb92f4e7ef6be").unwrap(), 0);
3124 chan.channel_monitor.set_funding_info((funding_info, Script::new()));
3126 chan.their_payment_basepoint = Some(PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&secp_ctx, &hex::decode("4444444444444444444444444444444444444444444444444444444444444444").unwrap()[..]).unwrap()));
3127 assert_eq!(chan.their_payment_basepoint.unwrap().serialize()[..],
3128 hex::decode("032c0b7cf95324a07d05398b240174dc0c2be444d96b159aa6c7f7b1e668680991").unwrap()[..]);
3130 chan.their_funding_pubkey = Some(PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&secp_ctx, &hex::decode("1552dfba4f6cf29a62a0af13c8d6981d36d0ef8d61ba10fb0fe90da7634d7e13").unwrap()[..]).unwrap()));
3131 assert_eq!(chan.their_funding_pubkey.unwrap().serialize()[..],
3132 hex::decode("030e9f7b623d2ccc7c9bd44d66d5ce21ce504c0acf6385a132cec6d3c39fa711c1").unwrap()[..]);
3134 chan.their_htlc_basepoint = Some(PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&secp_ctx, &hex::decode("4444444444444444444444444444444444444444444444444444444444444444").unwrap()[..]).unwrap()));
3135 assert_eq!(chan.their_htlc_basepoint.unwrap().serialize()[..],
3136 hex::decode("032c0b7cf95324a07d05398b240174dc0c2be444d96b159aa6c7f7b1e668680991").unwrap()[..]);
3138 chan.their_revocation_basepoint = Some(PublicKey::from_slice(&secp_ctx, &hex::decode("02466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f27").unwrap()[..]).unwrap());
3140 // We can't just use build_local_transaction_keys here as the per_commitment_secret is not
3141 // derived from a commitment_seed, so instead we copy it here and call
3142 // build_commitment_transaction.
3143 let delayed_payment_base = PublicKey::from_secret_key(&secp_ctx, &chan.local_keys.delayed_payment_base_key);
3144 let per_commitment_secret = SecretKey::from_slice(&secp_ctx, &hex::decode("1f1e1d1c1b1a191817161514131211100f0e0d0c0b0a09080706050403020100").unwrap()[..]).unwrap();
3145 let per_commitment_point = PublicKey::from_secret_key(&secp_ctx, &per_commitment_secret);
3146 let htlc_basepoint = PublicKey::from_secret_key(&secp_ctx, &chan.local_keys.htlc_base_key);
3147 let keys = TxCreationKeys::new(&secp_ctx, &per_commitment_point, &delayed_payment_base, &htlc_basepoint, &chan.their_revocation_basepoint.unwrap(), &chan.their_payment_basepoint.unwrap(), &chan.their_htlc_basepoint.unwrap()).unwrap();
3149 let mut unsigned_tx: (Transaction, Vec<HTLCOutputInCommitment>);
3151 macro_rules! test_commitment {
3152 ( $their_sig_hex: expr, $our_sig_hex: expr, $tx_hex: expr) => {
3153 unsigned_tx = chan.build_commitment_transaction(0xffffffffffff - 42, &keys, true, false, chan.feerate_per_kw);
3154 let their_signature = Signature::from_der(&secp_ctx, &hex::decode($their_sig_hex).unwrap()[..]).unwrap();
3155 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();
3156 secp_ctx.verify(&sighash, &their_signature, &chan.their_funding_pubkey.unwrap()).unwrap();
3158 chan.sign_commitment_transaction(&mut unsigned_tx.0, &their_signature);
3160 assert_eq!(serialize(&unsigned_tx.0).unwrap()[..],
3161 hex::decode($tx_hex).unwrap()[..]);
3165 macro_rules! test_htlc_output {
3166 ( $htlc_idx: expr, $their_sig_hex: expr, $our_sig_hex: expr, $tx_hex: expr ) => {
3167 let remote_signature = Signature::from_der(&secp_ctx, &hex::decode($their_sig_hex).unwrap()[..]).unwrap();
3169 let ref htlc = unsigned_tx.1[$htlc_idx];
3170 let mut htlc_tx = chan.build_htlc_transaction(&unsigned_tx.0.txid(), &htlc, true, &keys, chan.feerate_per_kw);
3171 let htlc_redeemscript = chan_utils::get_htlc_redeemscript(&htlc, &keys);
3172 let htlc_sighash = Message::from_slice(&bip143::SighashComponents::new(&htlc_tx).sighash_all(&htlc_tx.input[0], &htlc_redeemscript, htlc.amount_msat / 1000)[..]).unwrap();
3173 secp_ctx.verify(&htlc_sighash, &remote_signature, &keys.b_htlc_key).unwrap();
3175 let mut preimage: Option<[u8; 32]> = None;
3178 let mut sha = Sha256::new();
3179 sha.input(&[i; 32]);
3181 let mut out = [0; 32];
3182 sha.result(&mut out);
3184 if out == htlc.payment_hash {
3185 preimage = Some([i; 32]);
3189 assert!(preimage.is_some());
3192 chan.sign_htlc_transaction(&mut htlc_tx, &remote_signature, &preimage, &htlc, &keys).unwrap();
3193 assert_eq!(serialize(&htlc_tx).unwrap()[..],
3194 hex::decode($tx_hex).unwrap()[..]);
3199 // simple commitment tx with no HTLCs
3200 chan.value_to_self_msat = 7000000000;
3202 test_commitment!("3045022100f51d2e566a70ba740fc5d8c0f07b9b93d2ed741c3c0860c613173de7d39e7968022041376d520e9c0e1ad52248ddf4b22e12be8763007df977253ef45a4ca3bdb7c0",
3203 "3044022051b75c73198c6deee1a875871c3961832909acd297c6b908d59e3319e5185a46022055c419379c5051a78d00dbbce11b5b664a0c22815fbcc6fcef6b1937c3836939",
3204 "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");
3207 chan.pending_inbound_htlcs.push({
3208 let mut out = InboundHTLCOutput{
3210 amount_msat: 1000000,
3212 payment_hash: [0; 32],
3213 state: InboundHTLCState::Committed,
3215 let mut sha = Sha256::new();
3216 sha.input(&hex::decode("0000000000000000000000000000000000000000000000000000000000000000").unwrap());
3217 sha.result(&mut out.payment_hash);
3220 chan.pending_inbound_htlcs.push({
3221 let mut out = InboundHTLCOutput{
3223 amount_msat: 2000000,
3225 payment_hash: [0; 32],
3226 state: InboundHTLCState::Committed,
3228 let mut sha = Sha256::new();
3229 sha.input(&hex::decode("0101010101010101010101010101010101010101010101010101010101010101").unwrap());
3230 sha.result(&mut out.payment_hash);
3233 chan.pending_outbound_htlcs.push({
3234 let mut out = OutboundHTLCOutput{
3236 amount_msat: 2000000,
3238 payment_hash: [0; 32],
3239 state: OutboundHTLCState::Committed,
3240 source: HTLCSource::dummy(),
3243 let mut sha = Sha256::new();
3244 sha.input(&hex::decode("0202020202020202020202020202020202020202020202020202020202020202").unwrap());
3245 sha.result(&mut out.payment_hash);
3248 chan.pending_outbound_htlcs.push({
3249 let mut out = OutboundHTLCOutput{
3251 amount_msat: 3000000,
3253 payment_hash: [0; 32],
3254 state: OutboundHTLCState::Committed,
3255 source: HTLCSource::dummy(),
3258 let mut sha = Sha256::new();
3259 sha.input(&hex::decode("0303030303030303030303030303030303030303030303030303030303030303").unwrap());
3260 sha.result(&mut out.payment_hash);
3263 chan.pending_inbound_htlcs.push({
3264 let mut out = InboundHTLCOutput{
3266 amount_msat: 4000000,
3268 payment_hash: [0; 32],
3269 state: InboundHTLCState::Committed,
3271 let mut sha = Sha256::new();
3272 sha.input(&hex::decode("0404040404040404040404040404040404040404040404040404040404040404").unwrap());
3273 sha.result(&mut out.payment_hash);
3278 // commitment tx with all five HTLCs untrimmed (minimum feerate)
3279 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
3280 chan.feerate_per_kw = 0;
3282 test_commitment!("304402204fd4928835db1ccdfc40f5c78ce9bd65249b16348df81f0c44328dcdefc97d630220194d3869c38bc732dd87d13d2958015e2fc16829e74cd4377f84d215c0b70606",
3283 "30440220275b0c325a5e9355650dc30c0eccfbc7efb23987c24b556b9dfdd40effca18d202206caceb2c067836c51f296740c7ae807ffcbfbf1dd3a0d56b6de9a5b247985f06",
3284 "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");
3286 assert_eq!(unsigned_tx.1.len(), 5);
3288 test_htlc_output!(0,
3289 "304402206a6e59f18764a5bf8d4fa45eebc591566689441229c918b480fb2af8cc6a4aeb02205248f273be447684b33e3c8d1d85a8e0ca9fa0bae9ae33f0527ada9c162919a6",
3290 "304402207cb324fa0de88f452ffa9389678127ebcf4cabe1dd848b8e076c1a1962bf34720220116ed922b12311bd602d67e60d2529917f21c5b82f25ff6506c0f87886b4dfd5",
3291 "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");
3293 test_htlc_output!(1,
3294 "3045022100d5275b3619953cb0c3b5aa577f04bc512380e60fa551762ce3d7a1bb7401cff9022037237ab0dac3fe100cde094e82e2bed9ba0ed1bb40154b48e56aa70f259e608b",
3295 "3045022100c89172099507ff50f4c925e6c5150e871fb6e83dd73ff9fbb72f6ce829a9633f02203a63821d9162e99f9be712a68f9e589483994feae2661e4546cd5b6cec007be5",
3296 "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");
3298 test_htlc_output!(2,
3299 "304402201b63ec807771baf4fdff523c644080de17f1da478989308ad13a58b51db91d360220568939d38c9ce295adba15665fa68f51d967e8ed14a007b751540a80b325f202",
3300 "3045022100def389deab09cee69eaa1ec14d9428770e45bcbe9feb46468ecf481371165c2f022015d2e3c46600b2ebba8dcc899768874cc6851fd1ecb3fffd15db1cc3de7e10da",
3301 "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");
3303 test_htlc_output!(3,
3304 "3045022100daee1808f9861b6c3ecd14f7b707eca02dd6bdfc714ba2f33bc8cdba507bb182022026654bf8863af77d74f51f4e0b62d461a019561bb12acb120d3f7195d148a554",
3305 "30440220643aacb19bbb72bd2b635bc3f7375481f5981bace78cdd8319b2988ffcc6704202203d27784ec8ad51ed3bd517a05525a5139bb0b755dd719e0054332d186ac08727",
3306 "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");
3308 test_htlc_output!(4,
3309 "304402207e0410e45454b0978a623f36a10626ef17b27d9ad44e2760f98cfa3efb37924f0220220bd8acd43ecaa916a80bd4f919c495a2c58982ce7c8625153f8596692a801d",
3310 "30440220549e80b4496803cbc4a1d09d46df50109f546d43fbbf86cd90b174b1484acd5402205f12a4f995cb9bded597eabfee195a285986aa6d93ae5bb72507ebc6a4e2349e",
3311 "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");
3315 // commitment tx with seven outputs untrimmed (maximum feerate)
3316 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
3317 chan.feerate_per_kw = 647;
3319 test_commitment!("3045022100a5c01383d3ec646d97e40f44318d49def817fcd61a0ef18008a665b3e151785502203e648efddd5838981ef55ec954be69c4a652d021e6081a100d034de366815e9b",
3320 "304502210094bfd8f5572ac0157ec76a9551b6c5216a4538c07cd13a51af4a54cb26fa14320220768efce8ce6f4a5efac875142ff19237c011343670adf9c7ac69704a120d1163",
3321 "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");
3323 assert_eq!(unsigned_tx.1.len(), 5);
3325 test_htlc_output!(0,
3326 "30440220385a5afe75632f50128cbb029ee95c80156b5b4744beddc729ad339c9ca432c802202ba5f48550cad3379ac75b9b4fedb86a35baa6947f16ba5037fb8b11ab343740",
3327 "304402205999590b8a79fa346e003a68fd40366397119b2b0cdf37b149968d6bc6fbcc4702202b1e1fb5ab7864931caed4e732c359e0fe3d86a548b557be2246efb1708d579a",
3328 "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");
3330 test_htlc_output!(1,
3331 "304402207ceb6678d4db33d2401fdc409959e57c16a6cb97a30261d9c61f29b8c58d34b90220084b4a17b4ca0e86f2d798b3698ca52de5621f2ce86f80bed79afa66874511b0",
3332 "304402207ff03eb0127fc7c6cae49cc29e2a586b98d1e8969cf4a17dfa50b9c2647720b902205e2ecfda2252956c0ca32f175080e75e4e390e433feb1f8ce9f2ba55648a1dac",
3333 "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");
3335 test_htlc_output!(2,
3336 "304402206a401b29a0dff0d18ec903502c13d83e7ec019450113f4a7655a4ce40d1f65ba0220217723a084e727b6ca0cc8b6c69c014a7e4a01fcdcba3e3993f462a3c574d833",
3337 "3045022100d50d067ca625d54e62df533a8f9291736678d0b86c28a61bb2a80cf42e702d6e02202373dde7e00218eacdafb9415fe0e1071beec1857d1af3c6a201a44cbc47c877",
3338 "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");
3340 test_htlc_output!(3,
3341 "30450221009b1c987ba599ee3bde1dbca776b85481d70a78b681a8d84206723e2795c7cac002207aac84ad910f8598c4d1c0ea2e3399cf6627a4e3e90131315bc9f038451ce39d",
3342 "3045022100db9dc65291077a52728c622987e9895b7241d4394d6dcb916d7600a3e8728c22022036ee3ee717ba0bb5c45ee84bc7bbf85c0f90f26ae4e4a25a6b4241afa8a3f1cb",
3343 "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");
3345 test_htlc_output!(4,
3346 "3045022100cc28030b59f0914f45b84caa983b6f8effa900c952310708c2b5b00781117022022027ba2ccdf94d03c6d48b327f183f6e28c8a214d089b9227f94ac4f85315274f0",
3347 "304402202d1a3c0d31200265d2a2def2753ead4959ae20b4083e19553acfffa5dfab60bf022020ede134149504e15b88ab261a066de49848411e15e70f9e6a5462aec2949f8f",
3348 "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");
3352 // commitment tx with six outputs untrimmed (minimum feerate)
3353 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
3354 chan.feerate_per_kw = 648;
3356 test_commitment!("3044022072714e2fbb93cdd1c42eb0828b4f2eff143f717d8f26e79d6ada4f0dcb681bbe02200911be4e5161dd6ebe59ff1c58e1997c4aea804f81db6b698821db6093d7b057",
3357 "3045022100a2270d5950c89ae0841233f6efea9c951898b301b2e89e0adbd2c687b9f32efa02207943d90f95b9610458e7c65a576e149750ff3accaacad004cd85e70b235e27de",
3358 "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");
3360 assert_eq!(unsigned_tx.1.len(), 4);
3362 test_htlc_output!(0,
3363 "3044022062ef2e77591409d60d7817d9bb1e71d3c4a2931d1a6c7c8307422c84f001a251022022dad9726b0ae3fe92bda745a06f2c00f92342a186d84518588cf65f4dfaada8",
3364 "3045022100a4c574f00411dd2f978ca5cdc1b848c311cd7849c087ad2f21a5bce5e8cc5ae90220090ae39a9bce2fb8bc879d7e9f9022df249f41e25e51f1a9bf6447a9eeffc098",
3365 "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");
3367 test_htlc_output!(1,
3368 "3045022100e968cbbb5f402ed389fdc7f6cd2a80ed650bb42c79aeb2a5678444af94f6c78502204b47a1cb24ab5b0b6fe69fe9cfc7dba07b9dd0d8b95f372c1d9435146a88f8d4",
3369 "304402207679cf19790bea76a733d2fa0672bd43ab455687a068f815a3d237581f57139a0220683a1a799e102071c206b207735ca80f627ab83d6616b4bcd017c5d79ef3e7d0",
3370 "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");
3372 test_htlc_output!(2,
3373 "3045022100aa91932e305292cf9969cc23502bbf6cef83a5df39c95ad04a707c4f4fed5c7702207099fc0f3a9bfe1e7683c0e9aa5e76c5432eb20693bf4cb182f04d383dc9c8c2",
3374 "304402200df76fea718745f3c529bac7fd37923e7309ce38b25c0781e4cf514dd9ef8dc802204172295739dbae9fe0474dcee3608e3433b4b2af3a2e6787108b02f894dcdda3",
3375 "02000000000101579c183eca9e8236a5d7f5dcd79cfec32c497fdc0ec61533cde99ecd436cadd1020000000000000000010b0a0000000000002200204adb4e2f00643db396dd120d4e7dc17625f5f2c11a40d857accc862d6b7dd80e0500483045022100aa91932e305292cf9969cc23502bbf6cef83a5df39c95ad04a707c4f4fed5c7702207099fc0f3a9bfe1e7683c0e9aa5e76c5432eb20693bf4cb182f04d383dc9c8c20147304402200df76fea718745f3c529bac7fd37923e7309ce38b25c0781e4cf514dd9ef8dc802204172295739dbae9fe0474dcee3608e3433b4b2af3a2e6787108b02f894dcdda301008576a91414011f7254d96b819c76986c277d115efce6f7b58763ac67210394854aa6eab5b2a8122cc726e9dded053a2184d88256816826d6231c068d4a5b7c820120876475527c21030d417a46946384f88d5f3337267c5e579765875dc4daca813e21734b140639e752ae67a9148a486ff2e31d6158bf39e2608864d63fefd09d5b88ac6868f7010000");
3377 test_htlc_output!(3,
3378 "3044022035cac88040a5bba420b1c4257235d5015309113460bc33f2853cd81ca36e632402202fc94fd3e81e9d34a9d01782a0284f3044370d03d60f3fc041e2da088d2de58f",
3379 "304402200daf2eb7afd355b4caf6fb08387b5f031940ea29d1a9f35071288a839c9039e4022067201b562456e7948616c13acb876b386b511599b58ac1d94d127f91c50463a6",
3380 "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");
3384 // commitment tx with six outputs untrimmed (maximum feerate)
3385 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
3386 chan.feerate_per_kw = 2069;
3388 test_commitment!("3044022001d55e488b8b035b2dd29d50b65b530923a416d47f377284145bc8767b1b6a75022019bb53ddfe1cefaf156f924777eaaf8fdca1810695a7d0a247ad2afba8232eb4",
3389 "304402203ca8f31c6a47519f83255dc69f1894d9a6d7476a19f498d31eaf0cd3a85eeb63022026fd92dc752b33905c4c838c528b692a8ad4ced959990b5d5ee2ff940fa90eea",
3390 "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");
3392 assert_eq!(unsigned_tx.1.len(), 4);
3394 test_htlc_output!(0,
3395 "3045022100d1cf354de41c1369336cf85b225ed033f1f8982a01be503668df756a7e668b66022001254144fb4d0eecc61908fccc3388891ba17c5d7a1a8c62bdd307e5a513f992",
3396 "3044022056eb1af429660e45a1b0b66568cb8c4a3aa7e4c9c292d5d6c47f86ebf2c8838f022065c3ac4ebe980ca7a41148569be4ad8751b0a724a41405697ec55035dae66402",
3397 "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");
3399 test_htlc_output!(1,
3400 "3045022100d065569dcb94f090345402736385efeb8ea265131804beac06dd84d15dd2d6880220664feb0b4b2eb985fadb6ec7dc58c9334ea88ce599a9be760554a2d4b3b5d9f4",
3401 "3045022100914bb232cd4b2690ee3d6cb8c3713c4ac9c4fb925323068d8b07f67c8541f8d9022057152f5f1615b793d2d45aac7518989ae4fe970f28b9b5c77504799d25433f7f",
3402 "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");
3404 test_htlc_output!(2,
3405 "3045022100d4e69d363de993684eae7b37853c40722a4c1b4a7b588ad7b5d8a9b5006137a102207a069c628170ee34be5612747051bdcc087466dbaa68d5756ea81c10155aef18",
3406 "304402200e362443f7af830b419771e8e1614fc391db3a4eb799989abfc5ab26d6fcd032022039ab0cad1c14dfbe9446bf847965e56fe016e0cbcf719fd18c1bfbf53ecbd9f9",
3407 "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");
3409 test_htlc_output!(3,
3410 "30450221008ec888e36e4a4b3dc2ed6b823319855b2ae03006ca6ae0d9aa7e24bfc1d6f07102203b0f78885472a67ff4fe5916c0bb669487d659527509516fc3a08e87a2cc0a7c",
3411 "304402202c3e14282b84b02705dfd00a6da396c9fe8a8bcb1d3fdb4b20a4feba09440e8b02202b058b39aa9b0c865b22095edcd9ff1f71bbfe20aa4993755e54d042755ed0d5",
3412 "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");
3416 // commitment tx with five outputs untrimmed (minimum feerate)
3417 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
3418 chan.feerate_per_kw = 2070;
3420 test_commitment!("3045022100f2377f7a67b7fc7f4e2c0c9e3a7de935c32417f5668eda31ea1db401b7dc53030220415fdbc8e91d0f735e70c21952342742e25249b0d062d43efbfc564499f37526",
3421 "30440220443cb07f650aebbba14b8bc8d81e096712590f524c5991ac0ed3bbc8fd3bd0c7022028a635f548e3ca64b19b69b1ea00f05b22752f91daf0b6dab78e62ba52eb7fd0",
3422 "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");
3424 assert_eq!(unsigned_tx.1.len(), 3);
3426 test_htlc_output!(0,
3427 "3045022100eed143b1ee4bed5dc3cde40afa5db3e7354cbf9c44054b5f713f729356f08cf7022077161d171c2bbd9badf3c9934de65a4918de03bbac1450f715275f75b103f891",
3428 "3045022100a0d043ed533e7fb1911e0553d31a8e2f3e6de19dbc035257f29d747c5e02f1f5022030cd38d8e84282175d49c1ebe0470db3ebd59768cf40780a784e248a43904fb8",
3429 "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");
3431 test_htlc_output!(1,
3432 "3044022071e9357619fd8d29a411dc053b326a5224c5d11268070e88ecb981b174747c7a02202b763ae29a9d0732fa8836dd8597439460b50472183f420021b768981b4f7cf6",
3433 "3045022100adb1d679f65f96178b59f23ed37d3b70443118f345224a07ecb043eee2acc157022034d24524fe857144a3bcfff3065a9994d0a6ec5f11c681e49431d573e242612d",
3434 "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");
3436 test_htlc_output!(2,
3437 "3045022100c9458a4d2cbb741705577deb0a890e5cb90ee141be0400d3162e533727c9cb2102206edcf765c5dc5e5f9b976ea8149bf8607b5a0efb30691138e1231302b640d2a4",
3438 "304402200831422aa4e1ee6d55e0b894201770a8f8817a189356f2d70be76633ffa6a6f602200dd1b84a4855dc6727dd46c98daae43dfc70889d1ba7ef0087529a57c06e5e04",
3439 "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");
3443 // commitment tx with five outputs untrimmed (maximum feerate)
3444 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
3445 chan.feerate_per_kw = 2194;
3447 test_commitment!("3045022100d33c4e541aa1d255d41ea9a3b443b3b822ad8f7f86862638aac1f69f8f760577022007e2a18e6931ce3d3a804b1c78eda1de17dbe1fb7a95488c9a4ec86203953348",
3448 "304402203b1b010c109c2ecbe7feb2d259b9c4126bd5dc99ee693c422ec0a5781fe161ba0220571fe4e2c649dea9c7aaf7e49b382962f6a3494963c97d80fef9a430ca3f7061",
3449 "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");
3451 assert_eq!(unsigned_tx.1.len(), 3);
3453 test_htlc_output!(0,
3454 "30450221009ed2f0a67f99e29c3c8cf45c08207b765980697781bb727fe0b1416de0e7622902206052684229bc171419ed290f4b615c943f819c0262414e43c5b91dcf72ddcf44",
3455 "3044022004ad5f04ae69c71b3b141d4db9d0d4c38d84009fb3cfeeae6efdad414487a9a0022042d3fe1388c1ff517d1da7fb4025663d372c14728ed52dc88608363450ff6a2f",
3456 "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");
3458 test_htlc_output!(1,
3459 "30440220155d3b90c67c33a8321996a9be5b82431b0c126613be751d400669da9d5c696702204318448bcd48824439d2c6a70be6e5747446be47ff45977cf41672bdc9b6b12d",
3460 "304402201707050c870c1f77cc3ed58d6d71bf281de239e9eabd8ef0955bad0d7fe38dcc02204d36d80d0019b3a71e646a08fa4a5607761d341ae8be371946ebe437c289c915",
3461 "02000000000101fb824d4e4dafc0f567789dee3a6bce8d411fe80f5563d8cdfdcc7d7e4447d43a010000000000000000010a060000000000002200204adb4e2f00643db396dd120d4e7dc17625f5f2c11a40d857accc862d6b7dd80e05004730440220155d3b90c67c33a8321996a9be5b82431b0c126613be751d400669da9d5c696702204318448bcd48824439d2c6a70be6e5747446be47ff45977cf41672bdc9b6b12d0147304402201707050c870c1f77cc3ed58d6d71bf281de239e9eabd8ef0955bad0d7fe38dcc02204d36d80d0019b3a71e646a08fa4a5607761d341ae8be371946ebe437c289c91501008576a91414011f7254d96b819c76986c277d115efce6f7b58763ac67210394854aa6eab5b2a8122cc726e9dded053a2184d88256816826d6231c068d4a5b7c820120876475527c21030d417a46946384f88d5f3337267c5e579765875dc4daca813e21734b140639e752ae67a9148a486ff2e31d6158bf39e2608864d63fefd09d5b88ac6868f7010000");
3463 test_htlc_output!(2,
3464 "3045022100a12a9a473ece548584aabdd051779025a5ed4077c4b7aa376ec7a0b1645e5a48022039490b333f53b5b3e2ddde1d809e492cba2b3e5fc3a436cd3ffb4cd3d500fa5a",
3465 "3045022100ff200bc934ab26ce9a559e998ceb0aee53bc40368e114ab9d3054d9960546e2802202496856ca163ac12c143110b6b3ac9d598df7254f2e17b3b94c3ab5301f4c3b0",
3466 "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");
3470 // commitment tx with four outputs untrimmed (minimum feerate)
3471 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
3472 chan.feerate_per_kw = 2195;
3474 test_commitment!("304402205e2f76d4657fb732c0dfc820a18a7301e368f5799e06b7828007633741bda6df0220458009ae59d0c6246065c419359e05eb2a4b4ef4a1b310cc912db44eb7924298",
3475 "304402203b12d44254244b8ff3bb4129b0920fd45120ab42f553d9976394b099d500c99e02205e95bb7a3164852ef0c48f9e0eaf145218f8e2c41251b231f03cbdc4f29a5429",
3476 "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");
3478 assert_eq!(unsigned_tx.1.len(), 2);
3480 test_htlc_output!(0,
3481 "3045022100a8a78fa1016a5c5c3704f2e8908715a3cef66723fb95f3132ec4d2d05cd84fb4022025ac49287b0861ec21932405f5600cbce94313dbde0e6c5d5af1b3366d8afbfc",
3482 "3045022100be6ae1977fd7b630a53623f3f25c542317ccfc2b971782802a4f1ef538eb22b402207edc4d0408f8f38fd3c7365d1cfc26511b7cd2d4fecd8b005fba3cd5bc704390",
3483 "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");
3485 test_htlc_output!(1,
3486 "3045022100e769cb156aa2f7515d126cef7a69968629620ce82afcaa9e210969de6850df4602200b16b3f3486a229a48aadde520dbee31ae340dbadaffae74fbb56681fef27b92",
3487 "30440220665b9cb4a978c09d1ca8977a534999bc8a49da624d0c5439451dd69cde1a003d022070eae0620f01f3c1bd029cc1488da13fb40fdab76f396ccd335479a11c5276d8",
3488 "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");
3492 // commitment tx with four outputs untrimmed (maximum feerate)
3493 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
3494 chan.feerate_per_kw = 3702;
3496 test_commitment!("3045022100c1a3b0b60ca092ed5080121f26a74a20cec6bdee3f8e47bae973fcdceb3eda5502207d467a9873c939bf3aa758014ae67295fedbca52412633f7e5b2670fc7c381c1",
3497 "304402200e930a43c7951162dc15a2b7344f48091c74c70f7024e7116e900d8bcfba861c022066fa6cbda3929e21daa2e7e16a4b948db7e8919ef978402360d1095ffdaff7b0",
3498 "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");
3500 assert_eq!(unsigned_tx.1.len(), 2);
3502 test_htlc_output!(0,
3503 "3045022100dfb73b4fe961b31a859b2bb1f4f15cabab9265016dd0272323dc6a9e85885c54022059a7b87c02861ee70662907f25ce11597d7b68d3399443a831ae40e777b76bdb",
3504 "304402202765b9c9ece4f127fa5407faf66da4c5ce2719cdbe47cd3175fc7d48b482e43d02205605125925e07bad1e41c618a4b434d72c88a164981c4b8af5eaf4ee9142ec3a",
3505 "02000000000101b8de11eb51c22498fe39722c7227b6e55ff1a94146cf638458cb9bc6a060d3a30000000000000000000122020000000000002200204adb4e2f00643db396dd120d4e7dc17625f5f2c11a40d857accc862d6b7dd80e0500483045022100dfb73b4fe961b31a859b2bb1f4f15cabab9265016dd0272323dc6a9e85885c54022059a7b87c02861ee70662907f25ce11597d7b68d3399443a831ae40e777b76bdb0147304402202765b9c9ece4f127fa5407faf66da4c5ce2719cdbe47cd3175fc7d48b482e43d02205605125925e07bad1e41c618a4b434d72c88a164981c4b8af5eaf4ee9142ec3a01008576a91414011f7254d96b819c76986c277d115efce6f7b58763ac67210394854aa6eab5b2a8122cc726e9dded053a2184d88256816826d6231c068d4a5b7c820120876475527c21030d417a46946384f88d5f3337267c5e579765875dc4daca813e21734b140639e752ae67a9148a486ff2e31d6158bf39e2608864d63fefd09d5b88ac6868f7010000");
3507 test_htlc_output!(1,
3508 "3045022100ea9dc2a7c3c3640334dab733bb4e036e32a3106dc707b24227874fa4f7da746802204d672f7ac0fe765931a8df10b81e53a3242dd32bd9dc9331eb4a596da87954e9",
3509 "30440220048a41c660c4841693de037d00a407810389f4574b3286afb7bc392a438fa3f802200401d71fa87c64fe621b49ac07e3bf85157ac680acb977124da28652cc7f1a5c",
3510 "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");
3514 // commitment tx with three outputs untrimmed (minimum feerate)
3515 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
3516 chan.feerate_per_kw = 3703;
3518 test_commitment!("30450221008b7c191dd46893b67b628e618d2dc8e81169d38bade310181ab77d7c94c6675e02203b4dd131fd7c9deb299560983dcdc485545c98f989f7ae8180c28289f9e6bdb0",
3519 "3044022047305531dd44391dce03ae20f8735005c615eb077a974edb0059ea1a311857d602202e0ed6972fbdd1e8cb542b06e0929bc41b2ddf236e04cb75edd56151f4197506",
3520 "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");
3522 assert_eq!(unsigned_tx.1.len(), 1);
3524 test_htlc_output!(0,
3525 "3044022044f65cf833afdcb9d18795ca93f7230005777662539815b8a601eeb3e57129a902206a4bf3e53392affbba52640627defa8dc8af61c958c9e827b2798ab45828abdd",
3526 "3045022100b94d931a811b32eeb885c28ddcf999ae1981893b21dd1329929543fe87ce793002206370107fdd151c5f2384f9ceb71b3107c69c74c8ed5a28a94a4ab2d27d3b0724",
3527 "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");
3531 // commitment tx with three outputs untrimmed (maximum feerate)
3532 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
3533 chan.feerate_per_kw = 4914;
3535 test_commitment!("304402206d6cb93969d39177a09d5d45b583f34966195b77c7e585cf47ac5cce0c90cefb022031d71ae4e33a4e80df7f981d696fbdee517337806a3c7138b7491e2cbb077a0e",
3536 "304402206a2679efa3c7aaffd2a447fd0df7aba8792858b589750f6a1203f9259173198a022008d52a0e77a99ab533c36206cb15ad7aeb2aa72b93d4b571e728cb5ec2f6fe26",
3537 "02000000000101bef67e4e2fb9ddeeb3461973cd4c62abb35050b1add772995b820b584a488489000000000038b02b8003a00f0000000000002200208c48d15160397c9731df9bc3b236656efb6665fbfe92b4a6878e88a499f741c4c0c62d0000000000160014ccf1af2f2aabee14bb40fa3851ab2301de843110ae8f6a00000000002200204adb4e2f00643db396dd120d4e7dc17625f5f2c11a40d857accc862d6b7dd80e040047304402206a2679efa3c7aaffd2a447fd0df7aba8792858b589750f6a1203f9259173198a022008d52a0e77a99ab533c36206cb15ad7aeb2aa72b93d4b571e728cb5ec2f6fe260147304402206d6cb93969d39177a09d5d45b583f34966195b77c7e585cf47ac5cce0c90cefb022031d71ae4e33a4e80df7f981d696fbdee517337806a3c7138b7491e2cbb077a0e01475221023da092f6980e58d2c037173180e9a465476026ee50f96695963e8efe436f54eb21030e9f7b623d2ccc7c9bd44d66d5ce21ce504c0acf6385a132cec6d3c39fa711c152ae3e195220");
3539 assert_eq!(unsigned_tx.1.len(), 1);
3541 test_htlc_output!(0,
3542 "3045022100fcb38506bfa11c02874092a843d0cc0a8613c23b639832564a5f69020cb0f6ba02206508b9e91eaa001425c190c68ee5f887e1ad5b1b314002e74db9dbd9e42dbecf",
3543 "304502210086e76b460ddd3cea10525fba298405d3fe11383e56966a5091811368362f689a02200f72ee75657915e0ede89c28709acd113ede9e1b7be520e3bc5cda425ecd6e68",
3544 "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");
3548 // commitment tx with two outputs untrimmed (minimum feerate)
3549 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
3550 chan.feerate_per_kw = 4915;
3552 test_commitment!("304402200769ba89c7330dfa4feba447b6e322305f12ac7dac70ec6ba997ed7c1b598d0802204fe8d337e7fee781f9b7b1a06e580b22f4f79d740059560191d7db53f8765552",
3553 "3045022100a012691ba6cea2f73fa8bac37750477e66363c6d28813b0bb6da77c8eb3fb0270220365e99c51304b0b1a6ab9ea1c8500db186693e39ec1ad5743ee231b0138384b9",
3554 "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");
3556 assert_eq!(unsigned_tx.1.len(), 0);
3560 // commitment tx with two outputs untrimmed (maximum feerate)
3561 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
3562 chan.feerate_per_kw = 9651180;
3564 test_commitment!("3044022037f83ff00c8e5fb18ae1f918ffc24e54581775a20ff1ae719297ef066c71caa9022039c529cccd89ff6c5ed1db799614533844bd6d101da503761c45c713996e3bbd",
3565 "30440220514f977bf7edc442de8ce43ace9686e5ebdc0f893033f13e40fb46c8b8c6e1f90220188006227d175f5c35da0b092c57bea82537aed89f7778204dc5bacf4f29f2b9",
3566 "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");
3568 assert_eq!(unsigned_tx.1.len(), 0);
3572 // commitment tx with one output untrimmed (minimum feerate)
3573 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
3574 chan.feerate_per_kw = 9651181;
3576 test_commitment!("3044022064901950be922e62cbe3f2ab93de2b99f37cff9fc473e73e394b27f88ef0731d02206d1dfa227527b4df44a07599289e207d6fd9cca60c0365682dcd3deaf739567e",
3577 "3044022031a82b51bd014915fe68928d1abf4b9885353fb896cac10c3fdd88d7f9c7f2e00220716bda819641d2c63e65d3549b6120112e1aeaf1742eed94a471488e79e206b1",
3578 "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");
3580 assert_eq!(unsigned_tx.1.len(), 0);
3584 // commitment tx with fee greater than funder amount
3585 chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
3586 chan.feerate_per_kw = 9651936;
3588 test_commitment!("3044022064901950be922e62cbe3f2ab93de2b99f37cff9fc473e73e394b27f88ef0731d02206d1dfa227527b4df44a07599289e207d6fd9cca60c0365682dcd3deaf739567e",
3589 "3044022031a82b51bd014915fe68928d1abf4b9885353fb896cac10c3fdd88d7f9c7f2e00220716bda819641d2c63e65d3549b6120112e1aeaf1742eed94a471488e79e206b1",
3590 "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");
3592 assert_eq!(unsigned_tx.1.len(), 0);
3597 fn test_per_commitment_secret_gen() {
3598 // Test vectors from BOLT 3 Appendix D:
3600 let mut seed = [0; 32];
3601 seed[0..32].clone_from_slice(&hex::decode("0000000000000000000000000000000000000000000000000000000000000000").unwrap());
3602 assert_eq!(chan_utils::build_commitment_secret(seed, 281474976710655),
3603 hex::decode("02a40c85b6f28da08dfdbe0926c53fab2de6d28c10301f8f7c4073d5e42e3148").unwrap()[..]);
3605 seed[0..32].clone_from_slice(&hex::decode("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF").unwrap());
3606 assert_eq!(chan_utils::build_commitment_secret(seed, 281474976710655),
3607 hex::decode("7cc854b54e3e0dcdb010d7a3fee464a9687be6e8db3be6854c475621e007a5dc").unwrap()[..]);
3609 assert_eq!(chan_utils::build_commitment_secret(seed, 0xaaaaaaaaaaa),
3610 hex::decode("56f4008fb007ca9acf0e15b054d5c9fd12ee06cea347914ddbaed70d1c13a528").unwrap()[..]);
3612 assert_eq!(chan_utils::build_commitment_secret(seed, 0x555555555555),
3613 hex::decode("9015daaeb06dba4ccc05b91b2f73bd54405f2be9f217fbacd3c5ac2e62327d31").unwrap()[..]);
3615 seed[0..32].clone_from_slice(&hex::decode("0101010101010101010101010101010101010101010101010101010101010101").unwrap());
3616 assert_eq!(chan_utils::build_commitment_secret(seed, 1),
3617 hex::decode("915c75942a26bb3a433a8ce2cb0427c29ec6c1775cfc78328b57f6ba7bfeaa9c").unwrap()[..]);
3621 fn test_key_derivation() {
3622 // Test vectors from BOLT 3 Appendix E:
3623 let secp_ctx = Secp256k1::new();
3625 let base_secret = SecretKey::from_slice(&secp_ctx, &hex::decode("000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f").unwrap()[..]).unwrap();
3626 let per_commitment_secret = SecretKey::from_slice(&secp_ctx, &hex::decode("1f1e1d1c1b1a191817161514131211100f0e0d0c0b0a09080706050403020100").unwrap()[..]).unwrap();
3628 let base_point = PublicKey::from_secret_key(&secp_ctx, &base_secret);
3629 assert_eq!(base_point.serialize()[..], hex::decode("036d6caac248af96f6afa7f904f550253a0f3ef3f5aa2fe6838a95b216691468e2").unwrap()[..]);
3631 let per_commitment_point = PublicKey::from_secret_key(&secp_ctx, &per_commitment_secret);
3632 assert_eq!(per_commitment_point.serialize()[..], hex::decode("025f7117a78150fe2ef97db7cfc83bd57b2e2c0d0dd25eaf467a4a1c2a45ce1486").unwrap()[..]);
3634 assert_eq!(chan_utils::derive_public_key(&secp_ctx, &per_commitment_point, &base_point).unwrap().serialize()[..],
3635 hex::decode("0235f2dbfaa89b57ec7b055afe29849ef7ddfeb1cefdb9ebdc43f5494984db29e5").unwrap()[..]);
3637 assert_eq!(chan_utils::derive_private_key(&secp_ctx, &per_commitment_point, &base_secret).unwrap(),
3638 SecretKey::from_slice(&secp_ctx, &hex::decode("cbced912d3b21bf196a766651e436aff192362621ce317704ea2f75d87e7be0f").unwrap()[..]).unwrap());
3640 assert_eq!(chan_utils::derive_public_revocation_key(&secp_ctx, &per_commitment_point, &base_point).unwrap().serialize()[..],
3641 hex::decode("02916e326636d19c33f13e8c0c3a03dd157f332f3e99c317c141dd865eb01f8ff0").unwrap()[..]);
3643 assert_eq!(chan_utils::derive_private_revocation_key(&secp_ctx, &per_commitment_secret, &base_secret).unwrap(),
3644 SecretKey::from_slice(&secp_ctx, &hex::decode("d09ffff62ddb2297ab000cc85bcb4283fdeb6aa052affbc9dddcf33b61078110").unwrap()[..]).unwrap());