1 //! Various utilities for building scripts and deriving keys related to channels. These are
2 //! largely of interest for those implementing chain::keysinterface::ChannelKeys message signing
5 use bitcoin::blockdata::script::{Script,Builder};
6 use bitcoin::blockdata::opcodes;
7 use bitcoin::blockdata::transaction::{TxIn,TxOut,OutPoint,Transaction, SigHashType};
8 use bitcoin::consensus::encode::{self, Decodable, Encodable};
9 use bitcoin::util::bip143;
11 use bitcoin_hashes::{Hash, HashEngine};
12 use bitcoin_hashes::sha256::Hash as Sha256;
13 use bitcoin_hashes::ripemd160::Hash as Ripemd160;
14 use bitcoin_hashes::hash160::Hash as Hash160;
15 use bitcoin_hashes::sha256d::Hash as Sha256dHash;
17 use ln::channelmanager::{PaymentHash, PaymentPreimage};
18 use ln::msgs::DecodeError;
19 use util::ser::{Readable, Writeable, Writer, WriterWriteAdaptor};
22 use secp256k1::key::{SecretKey, PublicKey};
23 use secp256k1::{Secp256k1, Signature};
28 const MAX_ALLOC_SIZE: usize = 64*1024;
30 pub(super) const HTLC_SUCCESS_TX_WEIGHT: u64 = 703;
31 pub(super) const HTLC_TIMEOUT_TX_WEIGHT: u64 = 663;
34 pub(crate) enum HTLCType {
40 /// Check if a given tx witnessScript len matchs one of a pre-signed HTLC
41 pub(crate) fn scriptlen_to_htlctype(witness_script_len: usize) -> Option<HTLCType> {
42 if witness_script_len == 133 {
43 Some(HTLCType::OfferedHTLC)
44 } else if witness_script_len >= 136 && witness_script_len <= 139 {
45 Some(HTLCType::AcceptedHTLC)
52 // Various functions for key derivation and transaction creation for use within channels. Primarily
53 // used in Channel and ChannelMonitor.
55 pub(super) fn build_commitment_secret(commitment_seed: &[u8; 32], idx: u64) -> [u8; 32] {
56 let mut res: [u8; 32] = commitment_seed.clone();
59 if idx & (1 << bitpos) == (1 << bitpos) {
60 res[bitpos / 8] ^= 1 << (bitpos & 7);
61 res = Sha256::hash(&res).into_inner();
67 /// Implements the per-commitment secret storage scheme from
68 /// [BOLT 3](https://github.com/lightningnetwork/lightning-rfc/blob/dcbf8583976df087c79c3ce0b535311212e6812d/03-transactions.md#efficient-per-commitment-secret-storage).
70 /// Allows us to keep track of all of the revocation secrets of counterarties in just 50*32 bytes
73 pub(super) struct CounterpartyCommitmentSecrets {
74 old_secrets: [([u8; 32], u64); 49],
77 impl PartialEq for CounterpartyCommitmentSecrets {
78 fn eq(&self, other: &Self) -> bool {
79 for (&(ref secret, ref idx), &(ref o_secret, ref o_idx)) in self.old_secrets.iter().zip(other.old_secrets.iter()) {
80 if secret != o_secret || idx != o_idx {
88 impl CounterpartyCommitmentSecrets {
89 pub(super) fn new() -> Self {
90 Self { old_secrets: [([0; 32], 1 << 48); 49], }
94 fn place_secret(idx: u64) -> u8 {
96 if idx & (1 << i) == (1 << i) {
103 pub(super) fn get_min_seen_secret(&self) -> u64 {
104 //TODO This can be optimized?
105 let mut min = 1 << 48;
106 for &(_, idx) in self.old_secrets.iter() {
115 pub(super) fn derive_secret(secret: [u8; 32], bits: u8, idx: u64) -> [u8; 32] {
116 let mut res: [u8; 32] = secret;
118 let bitpos = bits - 1 - i;
119 if idx & (1 << bitpos) == (1 << bitpos) {
120 res[(bitpos / 8) as usize] ^= 1 << (bitpos & 7);
121 res = Sha256::hash(&res).into_inner();
127 pub(super) fn provide_secret(&mut self, idx: u64, secret: [u8; 32]) -> Result<(), ()> {
128 let pos = Self::place_secret(idx);
130 let (old_secret, old_idx) = self.old_secrets[i as usize];
131 if Self::derive_secret(secret, pos, old_idx) != old_secret {
135 if self.get_min_seen_secret() <= idx {
138 self.old_secrets[pos as usize] = (secret, idx);
142 /// Can only fail if idx is < get_min_seen_secret
143 pub(super) fn get_secret(&self, idx: u64) -> Option<[u8; 32]> {
144 for i in 0..self.old_secrets.len() {
145 if (idx & (!((1 << i) - 1))) == self.old_secrets[i].1 {
146 return Some(Self::derive_secret(self.old_secrets[i].0, i as u8, idx))
149 assert!(idx < self.get_min_seen_secret());
154 impl Writeable for CounterpartyCommitmentSecrets {
155 fn write<W: Writer>(&self, writer: &mut W) -> Result<(), ::std::io::Error> {
156 for &(ref secret, ref idx) in self.old_secrets.iter() {
157 writer.write_all(secret)?;
158 writer.write_all(&byte_utils::be64_to_array(*idx))?;
163 impl Readable for CounterpartyCommitmentSecrets {
164 fn read<R: ::std::io::Read>(reader: &mut R) -> Result<Self, DecodeError> {
165 let mut old_secrets = [([0; 32], 1 << 48); 49];
166 for &mut (ref mut secret, ref mut idx) in old_secrets.iter_mut() {
167 *secret = Readable::read(reader)?;
168 *idx = Readable::read(reader)?;
171 Ok(Self { old_secrets })
175 /// Derives a per-commitment-transaction private key (eg an htlc key or payment key) from the base
176 /// private key for that type of key and the per_commitment_point (available in TxCreationKeys)
177 pub fn derive_private_key<T: secp256k1::Signing>(secp_ctx: &Secp256k1<T>, per_commitment_point: &PublicKey, base_secret: &SecretKey) -> Result<SecretKey, secp256k1::Error> {
178 let mut sha = Sha256::engine();
179 sha.input(&per_commitment_point.serialize());
180 sha.input(&PublicKey::from_secret_key(&secp_ctx, &base_secret).serialize());
181 let res = Sha256::from_engine(sha).into_inner();
183 let mut key = base_secret.clone();
184 key.add_assign(&res)?;
188 pub(super) fn derive_public_key<T: secp256k1::Signing>(secp_ctx: &Secp256k1<T>, per_commitment_point: &PublicKey, base_point: &PublicKey) -> Result<PublicKey, secp256k1::Error> {
189 let mut sha = Sha256::engine();
190 sha.input(&per_commitment_point.serialize());
191 sha.input(&base_point.serialize());
192 let res = Sha256::from_engine(sha).into_inner();
194 let hashkey = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&res)?);
195 base_point.combine(&hashkey)
198 /// Derives a revocation key from its constituent parts.
199 /// Note that this is infallible iff we trust that at least one of the two input keys are randomly
200 /// generated (ie our own).
201 pub(super) fn derive_private_revocation_key<T: secp256k1::Signing>(secp_ctx: &Secp256k1<T>, per_commitment_secret: &SecretKey, revocation_base_secret: &SecretKey) -> Result<SecretKey, secp256k1::Error> {
202 let revocation_base_point = PublicKey::from_secret_key(&secp_ctx, &revocation_base_secret);
203 let per_commitment_point = PublicKey::from_secret_key(&secp_ctx, &per_commitment_secret);
205 let rev_append_commit_hash_key = {
206 let mut sha = Sha256::engine();
207 sha.input(&revocation_base_point.serialize());
208 sha.input(&per_commitment_point.serialize());
210 Sha256::from_engine(sha).into_inner()
212 let commit_append_rev_hash_key = {
213 let mut sha = Sha256::engine();
214 sha.input(&per_commitment_point.serialize());
215 sha.input(&revocation_base_point.serialize());
217 Sha256::from_engine(sha).into_inner()
220 let mut part_a = revocation_base_secret.clone();
221 part_a.mul_assign(&rev_append_commit_hash_key)?;
222 let mut part_b = per_commitment_secret.clone();
223 part_b.mul_assign(&commit_append_rev_hash_key)?;
224 part_a.add_assign(&part_b[..])?;
228 pub(super) fn derive_public_revocation_key<T: secp256k1::Verification>(secp_ctx: &Secp256k1<T>, per_commitment_point: &PublicKey, revocation_base_point: &PublicKey) -> Result<PublicKey, secp256k1::Error> {
229 let rev_append_commit_hash_key = {
230 let mut sha = Sha256::engine();
231 sha.input(&revocation_base_point.serialize());
232 sha.input(&per_commitment_point.serialize());
234 Sha256::from_engine(sha).into_inner()
236 let commit_append_rev_hash_key = {
237 let mut sha = Sha256::engine();
238 sha.input(&per_commitment_point.serialize());
239 sha.input(&revocation_base_point.serialize());
241 Sha256::from_engine(sha).into_inner()
244 let mut part_a = revocation_base_point.clone();
245 part_a.mul_assign(&secp_ctx, &rev_append_commit_hash_key)?;
246 let mut part_b = per_commitment_point.clone();
247 part_b.mul_assign(&secp_ctx, &commit_append_rev_hash_key)?;
248 part_a.combine(&part_b)
251 /// The set of public keys which are used in the creation of one commitment transaction.
252 /// These are derived from the channel base keys and per-commitment data.
253 #[derive(PartialEq, Clone)]
254 pub struct TxCreationKeys {
255 /// The per-commitment public key which was used to derive the other keys.
256 pub per_commitment_point: PublicKey,
257 /// The revocation key which is used to allow the owner of the commitment transaction to
258 /// provide their counterparty the ability to punish them if they broadcast an old state.
259 pub(crate) revocation_key: PublicKey,
261 pub(crate) a_htlc_key: PublicKey,
263 pub(crate) b_htlc_key: PublicKey,
264 /// A's Payment Key (which isn't allowed to be spent from for some delay)
265 pub(crate) a_delayed_payment_key: PublicKey,
267 pub(crate) b_payment_key: PublicKey,
269 impl_writeable!(TxCreationKeys, 33*6,
270 { per_commitment_point, revocation_key, a_htlc_key, b_htlc_key, a_delayed_payment_key, b_payment_key });
272 /// One counterparty's public keys which do not change over the life of a channel.
273 #[derive(Clone, PartialEq)]
274 pub struct ChannelPublicKeys {
275 /// The public key which is used to sign all commitment transactions, as it appears in the
276 /// on-chain channel lock-in 2-of-2 multisig output.
277 pub funding_pubkey: PublicKey,
278 /// The base point which is used (with derive_public_revocation_key) to derive per-commitment
279 /// revocation keys. The per-commitment revocation private key is then revealed by the owner of
280 /// a commitment transaction so that their counterparty can claim all available funds if they
281 /// broadcast an old state.
282 pub revocation_basepoint: PublicKey,
283 /// The base point which is used (with derive_public_key) to derive a per-commitment payment
284 /// public key which receives immediately-spendable non-HTLC-encumbered funds.
285 pub payment_basepoint: PublicKey,
286 /// The base point which is used (with derive_public_key) to derive a per-commitment payment
287 /// public key which receives non-HTLC-encumbered funds which are only available for spending
288 /// after some delay (or can be claimed via the revocation path).
289 pub delayed_payment_basepoint: PublicKey,
290 /// The base point which is used (with derive_public_key) to derive a per-commitment public key
291 /// which is used to encumber HTLC-in-flight outputs.
292 pub htlc_basepoint: PublicKey,
295 impl_writeable!(ChannelPublicKeys, 33*5, {
297 revocation_basepoint,
299 delayed_payment_basepoint,
304 impl TxCreationKeys {
305 pub(crate) fn new<T: secp256k1::Signing + secp256k1::Verification>(secp_ctx: &Secp256k1<T>, per_commitment_point: &PublicKey, a_delayed_payment_base: &PublicKey, a_htlc_base: &PublicKey, b_revocation_base: &PublicKey, b_payment_base: &PublicKey, b_htlc_base: &PublicKey) -> Result<TxCreationKeys, secp256k1::Error> {
307 per_commitment_point: per_commitment_point.clone(),
308 revocation_key: derive_public_revocation_key(&secp_ctx, &per_commitment_point, &b_revocation_base)?,
309 a_htlc_key: derive_public_key(&secp_ctx, &per_commitment_point, &a_htlc_base)?,
310 b_htlc_key: derive_public_key(&secp_ctx, &per_commitment_point, &b_htlc_base)?,
311 a_delayed_payment_key: derive_public_key(&secp_ctx, &per_commitment_point, &a_delayed_payment_base)?,
312 b_payment_key: derive_public_key(&secp_ctx, &per_commitment_point, &b_payment_base)?,
317 /// Gets the "to_local" output redeemscript, ie the script which is time-locked or spendable by
318 /// the revocation key
319 pub(super) fn get_revokeable_redeemscript(revocation_key: &PublicKey, to_self_delay: u16, delayed_payment_key: &PublicKey) -> Script {
320 Builder::new().push_opcode(opcodes::all::OP_IF)
321 .push_slice(&revocation_key.serialize())
322 .push_opcode(opcodes::all::OP_ELSE)
323 .push_int(to_self_delay as i64)
324 .push_opcode(opcodes::all::OP_CSV)
325 .push_opcode(opcodes::all::OP_DROP)
326 .push_slice(&delayed_payment_key.serialize())
327 .push_opcode(opcodes::all::OP_ENDIF)
328 .push_opcode(opcodes::all::OP_CHECKSIG)
332 #[derive(Clone, PartialEq)]
333 /// Information about an HTLC as it appears in a commitment transaction
334 pub struct HTLCOutputInCommitment {
335 /// Whether the HTLC was "offered" (ie outbound in relation to this commitment transaction).
336 /// Note that this is not the same as whether it is ountbound *from us*. To determine that you
337 /// need to compare this value to whether the commitment transaction in question is that of
338 /// the remote party or our own.
340 /// The value, in msat, of the HTLC. The value as it appears in the commitment transaction is
341 /// this divided by 1000.
342 pub amount_msat: u64,
343 /// The CLTV lock-time at which this HTLC expires.
344 pub cltv_expiry: u32,
345 /// The hash of the preimage which unlocks this HTLC.
346 pub payment_hash: PaymentHash,
347 /// The position within the commitment transactions' outputs. This may be None if the value is
348 /// below the dust limit (in which case no output appears in the commitment transaction and the
349 /// value is spent to additional transaction fees).
350 pub transaction_output_index: Option<u32>,
353 impl_writeable!(HTLCOutputInCommitment, 1 + 8 + 4 + 32 + 5, {
358 transaction_output_index
362 pub(crate) fn get_htlc_redeemscript_with_explicit_keys(htlc: &HTLCOutputInCommitment, a_htlc_key: &PublicKey, b_htlc_key: &PublicKey, revocation_key: &PublicKey) -> Script {
363 let payment_hash160 = Ripemd160::hash(&htlc.payment_hash.0[..]).into_inner();
365 Builder::new().push_opcode(opcodes::all::OP_DUP)
366 .push_opcode(opcodes::all::OP_HASH160)
367 .push_slice(&Hash160::hash(&revocation_key.serialize())[..])
368 .push_opcode(opcodes::all::OP_EQUAL)
369 .push_opcode(opcodes::all::OP_IF)
370 .push_opcode(opcodes::all::OP_CHECKSIG)
371 .push_opcode(opcodes::all::OP_ELSE)
372 .push_slice(&b_htlc_key.serialize()[..])
373 .push_opcode(opcodes::all::OP_SWAP)
374 .push_opcode(opcodes::all::OP_SIZE)
376 .push_opcode(opcodes::all::OP_EQUAL)
377 .push_opcode(opcodes::all::OP_NOTIF)
378 .push_opcode(opcodes::all::OP_DROP)
380 .push_opcode(opcodes::all::OP_SWAP)
381 .push_slice(&a_htlc_key.serialize()[..])
383 .push_opcode(opcodes::all::OP_CHECKMULTISIG)
384 .push_opcode(opcodes::all::OP_ELSE)
385 .push_opcode(opcodes::all::OP_HASH160)
386 .push_slice(&payment_hash160)
387 .push_opcode(opcodes::all::OP_EQUALVERIFY)
388 .push_opcode(opcodes::all::OP_CHECKSIG)
389 .push_opcode(opcodes::all::OP_ENDIF)
390 .push_opcode(opcodes::all::OP_ENDIF)
393 Builder::new().push_opcode(opcodes::all::OP_DUP)
394 .push_opcode(opcodes::all::OP_HASH160)
395 .push_slice(&Hash160::hash(&revocation_key.serialize())[..])
396 .push_opcode(opcodes::all::OP_EQUAL)
397 .push_opcode(opcodes::all::OP_IF)
398 .push_opcode(opcodes::all::OP_CHECKSIG)
399 .push_opcode(opcodes::all::OP_ELSE)
400 .push_slice(&b_htlc_key.serialize()[..])
401 .push_opcode(opcodes::all::OP_SWAP)
402 .push_opcode(opcodes::all::OP_SIZE)
404 .push_opcode(opcodes::all::OP_EQUAL)
405 .push_opcode(opcodes::all::OP_IF)
406 .push_opcode(opcodes::all::OP_HASH160)
407 .push_slice(&payment_hash160)
408 .push_opcode(opcodes::all::OP_EQUALVERIFY)
410 .push_opcode(opcodes::all::OP_SWAP)
411 .push_slice(&a_htlc_key.serialize()[..])
413 .push_opcode(opcodes::all::OP_CHECKMULTISIG)
414 .push_opcode(opcodes::all::OP_ELSE)
415 .push_opcode(opcodes::all::OP_DROP)
416 .push_int(htlc.cltv_expiry as i64)
417 .push_opcode(opcodes::all::OP_CLTV)
418 .push_opcode(opcodes::all::OP_DROP)
419 .push_opcode(opcodes::all::OP_CHECKSIG)
420 .push_opcode(opcodes::all::OP_ENDIF)
421 .push_opcode(opcodes::all::OP_ENDIF)
426 /// note here that 'a_revocation_key' is generated using b_revocation_basepoint and a's
427 /// commitment secret. 'htlc' does *not* need to have its previous_output_index filled.
429 pub fn get_htlc_redeemscript(htlc: &HTLCOutputInCommitment, keys: &TxCreationKeys) -> Script {
430 get_htlc_redeemscript_with_explicit_keys(htlc, &keys.a_htlc_key, &keys.b_htlc_key, &keys.revocation_key)
433 /// Gets the redeemscript for a funding output from the two funding public keys.
434 /// Note that the order of funding public keys does not matter.
435 pub fn make_funding_redeemscript(a: &PublicKey, b: &PublicKey) -> Script {
436 let our_funding_key = a.serialize();
437 let their_funding_key = b.serialize();
439 let builder = Builder::new().push_opcode(opcodes::all::OP_PUSHNUM_2);
440 if our_funding_key[..] < their_funding_key[..] {
441 builder.push_slice(&our_funding_key)
442 .push_slice(&their_funding_key)
444 builder.push_slice(&their_funding_key)
445 .push_slice(&our_funding_key)
446 }.push_opcode(opcodes::all::OP_PUSHNUM_2).push_opcode(opcodes::all::OP_CHECKMULTISIG).into_script()
449 /// panics if htlc.transaction_output_index.is_none()!
450 pub fn build_htlc_transaction(prev_hash: &Sha256dHash, feerate_per_kw: u64, to_self_delay: u16, htlc: &HTLCOutputInCommitment, a_delayed_payment_key: &PublicKey, revocation_key: &PublicKey) -> Transaction {
451 let mut txins: Vec<TxIn> = Vec::new();
453 previous_output: OutPoint {
454 txid: prev_hash.clone(),
455 vout: htlc.transaction_output_index.expect("Can't build an HTLC transaction for a dust output"),
457 script_sig: Script::new(),
462 let total_fee = if htlc.offered {
463 feerate_per_kw * HTLC_TIMEOUT_TX_WEIGHT / 1000
465 feerate_per_kw * HTLC_SUCCESS_TX_WEIGHT / 1000
468 let mut txouts: Vec<TxOut> = Vec::new();
470 script_pubkey: get_revokeable_redeemscript(revocation_key, to_self_delay, a_delayed_payment_key).to_v0_p2wsh(),
471 value: htlc.amount_msat / 1000 - total_fee //TODO: BOLT 3 does not specify if we should add amount_msat before dividing or if we should divide by 1000 before subtracting (as we do here)
476 lock_time: if htlc.offered { htlc.cltv_expiry } else { 0 },
483 /// We use this to track local commitment transactions and put off signing them until we are ready
484 /// to broadcast. Eventually this will require a signer which is possibly external, but for now we
485 /// just pass in the SecretKeys required.
486 pub struct LocalCommitmentTransaction {
488 pub(crate) local_keys: TxCreationKeys,
489 pub(crate) feerate_per_kw: u64,
490 per_htlc: Vec<(HTLCOutputInCommitment, Option<Signature>, Option<Transaction>)>
492 impl LocalCommitmentTransaction {
494 pub fn dummy() -> Self {
495 let dummy_input = TxIn {
496 previous_output: OutPoint {
497 txid: Default::default(),
500 script_sig: Default::default(),
502 witness: vec![vec![], vec![], vec![]]
504 let dummy_key = PublicKey::from_secret_key(&Secp256k1::new(), &SecretKey::from_slice(&[42; 32]).unwrap());
508 input: vec![dummy_input],
512 local_keys: TxCreationKeys {
513 per_commitment_point: dummy_key.clone(),
514 revocation_key: dummy_key.clone(),
515 a_htlc_key: dummy_key.clone(),
516 b_htlc_key: dummy_key.clone(),
517 a_delayed_payment_key: dummy_key.clone(),
518 b_payment_key: dummy_key.clone(),
525 /// Generate a new LocalCommitmentTransaction based on a raw commitment transaction,
526 /// remote signature and both parties keys
527 pub(crate) fn new_missing_local_sig(mut tx: Transaction, their_sig: &Signature, our_funding_key: &PublicKey, their_funding_key: &PublicKey, local_keys: TxCreationKeys, feerate_per_kw: u64, mut htlc_data: Vec<(HTLCOutputInCommitment, Option<Signature>)>) -> LocalCommitmentTransaction {
528 if tx.input.len() != 1 { panic!("Tried to store a commitment transaction that had input count != 1!"); }
529 if tx.input[0].witness.len() != 0 { panic!("Tried to store a signed commitment transaction?"); }
531 tx.input[0].witness.push(Vec::new()); // First is the multisig dummy
533 if our_funding_key.serialize()[..] < their_funding_key.serialize()[..] {
534 tx.input[0].witness.push(Vec::new());
535 tx.input[0].witness.push(their_sig.serialize_der().to_vec());
536 tx.input[0].witness[2].push(SigHashType::All as u8);
538 tx.input[0].witness.push(their_sig.serialize_der().to_vec());
539 tx.input[0].witness[1].push(SigHashType::All as u8);
540 tx.input[0].witness.push(Vec::new());
546 // TODO: Avoid the conversion of a Vec created likely just for this:
547 per_htlc: htlc_data.drain(..).map(|(a, b)| (a, b, None)).collect(),
551 /// Get the txid of the local commitment transaction contained in this
552 /// LocalCommitmentTransaction
553 pub fn txid(&self) -> Sha256dHash {
557 /// Check if LocalCommitmentTransaction has already been signed by us
558 pub fn has_local_sig(&self) -> bool {
559 if self.tx.input.len() != 1 { panic!("Commitment transactions must have input count == 1!"); }
560 if self.tx.input[0].witness.len() == 4 {
561 assert!(!self.tx.input[0].witness[1].is_empty());
562 assert!(!self.tx.input[0].witness[2].is_empty());
565 assert_eq!(self.tx.input[0].witness.len(), 3);
566 assert!(self.tx.input[0].witness[0].is_empty());
567 assert!(self.tx.input[0].witness[1].is_empty() || self.tx.input[0].witness[2].is_empty());
572 /// Add local signature for LocalCommitmentTransaction, do nothing if signature is already
575 /// Funding key is your key included in the 2-2 funding_outpoint lock. Should be provided
576 /// by your ChannelKeys.
577 /// Funding redeemscript is script locking funding_outpoint. This is the mutlsig script
578 /// between your own funding key and your counterparty's. Currently, this is provided in
579 /// ChannelKeys::sign_local_commitment() calls directly.
580 /// Channel value is amount locked in funding_outpoint.
581 pub fn add_local_sig<T: secp256k1::Signing>(&mut self, funding_key: &SecretKey, funding_redeemscript: &Script, channel_value_satoshis: u64, secp_ctx: &Secp256k1<T>) {
582 if self.has_local_sig() { return; }
583 let sighash = hash_to_message!(&bip143::SighashComponents::new(&self.tx)
584 .sighash_all(&self.tx.input[0], funding_redeemscript, channel_value_satoshis)[..]);
585 let our_sig = secp_ctx.sign(&sighash, funding_key);
587 if self.tx.input[0].witness[1].is_empty() {
588 self.tx.input[0].witness[1] = our_sig.serialize_der().to_vec();
589 self.tx.input[0].witness[1].push(SigHashType::All as u8);
591 self.tx.input[0].witness[2] = our_sig.serialize_der().to_vec();
592 self.tx.input[0].witness[2].push(SigHashType::All as u8);
595 self.tx.input[0].witness.push(funding_redeemscript.as_bytes().to_vec());
598 /// Get raw transaction without asserting if witness is complete
599 pub(crate) fn without_valid_witness(&self) -> &Transaction { &self.tx }
600 /// Get raw transaction with panics if witness is incomplete
601 pub fn with_valid_witness(&self) -> &Transaction {
602 assert!(self.has_local_sig());
606 /// Add local signature for a htlc transaction, do nothing if a cached signed transaction is
608 pub fn add_htlc_sig<T: secp256k1::Signing>(&mut self, htlc_base_key: &SecretKey, htlc_index: u32, preimage: Option<PaymentPreimage>, local_csv: u16, secp_ctx: &Secp256k1<T>) {
609 let txid = self.txid();
610 for this_htlc in self.per_htlc.iter_mut() {
611 if this_htlc.0.transaction_output_index == Some(htlc_index) {
612 if this_htlc.2.is_some() { return; } // we already have a cached htlc transaction at provided index
613 let mut htlc_tx = build_htlc_transaction(&txid, self.feerate_per_kw, local_csv, &this_htlc.0, &self.local_keys.a_delayed_payment_key, &self.local_keys.revocation_key);
614 if !this_htlc.0.offered && preimage.is_none() { return; } // if we don't have preimage for HTLC-Success, don't try to generate
615 let htlc_secret = if !this_htlc.0.offered { preimage } else { None }; // if we have a preimage for HTLC-Timeout, don't use it that's likely a duplicate HTLC hash
616 if this_htlc.1.is_none() { return; } // we don't have any remote signature for this htlc
617 if htlc_tx.input.len() != 1 { return; }
618 if htlc_tx.input[0].witness.len() != 0 { return; }
620 let htlc_redeemscript = get_htlc_redeemscript_with_explicit_keys(&this_htlc.0, &self.local_keys.a_htlc_key, &self.local_keys.b_htlc_key, &self.local_keys.revocation_key);
622 if let Ok(our_htlc_key) = derive_private_key(secp_ctx, &self.local_keys.per_commitment_point, htlc_base_key) {
623 let sighash = hash_to_message!(&bip143::SighashComponents::new(&htlc_tx).sighash_all(&htlc_tx.input[0], &htlc_redeemscript, this_htlc.0.amount_msat / 1000)[..]);
624 let our_sig = secp_ctx.sign(&sighash, &our_htlc_key);
626 htlc_tx.input[0].witness.push(Vec::new()); // First is the multisig dummy
628 htlc_tx.input[0].witness.push(this_htlc.1.unwrap().serialize_der().to_vec());
629 htlc_tx.input[0].witness.push(our_sig.serialize_der().to_vec());
630 htlc_tx.input[0].witness[1].push(SigHashType::All as u8);
631 htlc_tx.input[0].witness[2].push(SigHashType::All as u8);
633 if this_htlc.0.offered {
634 htlc_tx.input[0].witness.push(Vec::new());
635 assert!(htlc_secret.is_none());
637 htlc_tx.input[0].witness.push(htlc_secret.unwrap().0.to_vec());
640 htlc_tx.input[0].witness.push(htlc_redeemscript.as_bytes().to_vec());
642 this_htlc.2 = Some(htlc_tx);
647 /// Expose raw htlc transaction, guarante witness is complete if non-empty
648 pub fn htlc_with_valid_witness(&self, htlc_index: u32) -> &Option<Transaction> {
649 for this_htlc in self.per_htlc.iter() {
650 if this_htlc.0.transaction_output_index.unwrap() == htlc_index {
657 impl PartialEq for LocalCommitmentTransaction {
658 // We dont care whether we are signed in equality comparison
659 fn eq(&self, o: &Self) -> bool {
660 self.txid() == o.txid()
663 impl Writeable for LocalCommitmentTransaction {
664 fn write<W: Writer>(&self, writer: &mut W) -> Result<(), ::std::io::Error> {
665 if let Err(e) = self.tx.consensus_encode(&mut WriterWriteAdaptor(writer)) {
667 encode::Error::Io(e) => return Err(e),
668 _ => panic!("local tx must have been well-formed!"),
671 self.local_keys.write(writer)?;
672 self.feerate_per_kw.write(writer)?;
673 writer.write_all(&byte_utils::be64_to_array(self.per_htlc.len() as u64))?;
674 for &(ref htlc, ref sig, ref htlc_tx) in self.per_htlc.iter() {
677 htlc_tx.write(writer)?;
682 impl Readable for LocalCommitmentTransaction {
683 fn read<R: ::std::io::Read>(reader: &mut R) -> Result<Self, DecodeError> {
684 let tx = match Transaction::consensus_decode(reader.by_ref()) {
687 encode::Error::Io(ioe) => return Err(DecodeError::Io(ioe)),
688 _ => return Err(DecodeError::InvalidValue),
691 let local_keys = Readable::read(reader)?;
692 let feerate_per_kw = Readable::read(reader)?;
693 let htlcs_count: u64 = Readable::read(reader)?;
694 let mut per_htlc = Vec::with_capacity(cmp::min(htlcs_count as usize, MAX_ALLOC_SIZE / mem::size_of::<(HTLCOutputInCommitment, Option<Signature>, Option<Transaction>)>()));
695 for _ in 0..htlcs_count {
696 let htlc: HTLCOutputInCommitment = Readable::read(reader)?;
697 let sigs = Readable::read(reader)?;
698 let htlc_tx = Readable::read(reader)?;
699 per_htlc.push((htlc, sigs, htlc_tx));
702 if tx.input.len() != 1 {
703 // Ensure tx didn't hit the 0-input ambiguity case.
704 return Err(DecodeError::InvalidValue);
717 use super::CounterpartyCommitmentSecrets;
721 fn test_per_commitment_storage() {
722 // Test vectors from BOLT 3:
723 let mut secrets: Vec<[u8; 32]> = Vec::new();
726 macro_rules! test_secrets {
728 let mut idx = 281474976710655;
729 for secret in secrets.iter() {
730 assert_eq!(monitor.get_secret(idx).unwrap(), *secret);
733 assert_eq!(monitor.get_min_seen_secret(), idx + 1);
734 assert!(monitor.get_secret(idx).is_none());
739 // insert_secret correct sequence
740 monitor = CounterpartyCommitmentSecrets::new();
743 secrets.push([0; 32]);
744 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("7cc854b54e3e0dcdb010d7a3fee464a9687be6e8db3be6854c475621e007a5dc").unwrap());
745 monitor.provide_secret(281474976710655, secrets.last().unwrap().clone()).unwrap();
748 secrets.push([0; 32]);
749 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("c7518c8ae4660ed02894df8976fa1a3659c1a8b4b5bec0c4b872abeba4cb8964").unwrap());
750 monitor.provide_secret(281474976710654, secrets.last().unwrap().clone()).unwrap();
753 secrets.push([0; 32]);
754 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("2273e227a5b7449b6e70f1fb4652864038b1cbf9cd7c043a7d6456b7fc275ad8").unwrap());
755 monitor.provide_secret(281474976710653, secrets.last().unwrap().clone()).unwrap();
758 secrets.push([0; 32]);
759 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("27cddaa5624534cb6cb9d7da077cf2b22ab21e9b506fd4998a51d54502e99116").unwrap());
760 monitor.provide_secret(281474976710652, secrets.last().unwrap().clone()).unwrap();
763 secrets.push([0; 32]);
764 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("c65716add7aa98ba7acb236352d665cab17345fe45b55fb879ff80e6bd0c41dd").unwrap());
765 monitor.provide_secret(281474976710651, secrets.last().unwrap().clone()).unwrap();
768 secrets.push([0; 32]);
769 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("969660042a28f32d9be17344e09374b379962d03db1574df5a8a5a47e19ce3f2").unwrap());
770 monitor.provide_secret(281474976710650, secrets.last().unwrap().clone()).unwrap();
773 secrets.push([0; 32]);
774 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("a5a64476122ca0925fb344bdc1854c1c0a59fc614298e50a33e331980a220f32").unwrap());
775 monitor.provide_secret(281474976710649, secrets.last().unwrap().clone()).unwrap();
778 secrets.push([0; 32]);
779 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("05cde6323d949933f7f7b78776bcc1ea6d9b31447732e3802e1f7ac44b650e17").unwrap());
780 monitor.provide_secret(281474976710648, secrets.last().unwrap().clone()).unwrap();
785 // insert_secret #1 incorrect
786 monitor = CounterpartyCommitmentSecrets::new();
789 secrets.push([0; 32]);
790 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("02a40c85b6f28da08dfdbe0926c53fab2de6d28c10301f8f7c4073d5e42e3148").unwrap());
791 monitor.provide_secret(281474976710655, secrets.last().unwrap().clone()).unwrap();
794 secrets.push([0; 32]);
795 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("c7518c8ae4660ed02894df8976fa1a3659c1a8b4b5bec0c4b872abeba4cb8964").unwrap());
796 assert!(monitor.provide_secret(281474976710654, secrets.last().unwrap().clone()).is_err());
800 // insert_secret #2 incorrect (#1 derived from incorrect)
801 monitor = CounterpartyCommitmentSecrets::new();
804 secrets.push([0; 32]);
805 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("02a40c85b6f28da08dfdbe0926c53fab2de6d28c10301f8f7c4073d5e42e3148").unwrap());
806 monitor.provide_secret(281474976710655, secrets.last().unwrap().clone()).unwrap();
809 secrets.push([0; 32]);
810 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("dddc3a8d14fddf2b68fa8c7fbad2748274937479dd0f8930d5ebb4ab6bd866a3").unwrap());
811 monitor.provide_secret(281474976710654, secrets.last().unwrap().clone()).unwrap();
814 secrets.push([0; 32]);
815 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("2273e227a5b7449b6e70f1fb4652864038b1cbf9cd7c043a7d6456b7fc275ad8").unwrap());
816 monitor.provide_secret(281474976710653, secrets.last().unwrap().clone()).unwrap();
819 secrets.push([0; 32]);
820 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("27cddaa5624534cb6cb9d7da077cf2b22ab21e9b506fd4998a51d54502e99116").unwrap());
821 assert!(monitor.provide_secret(281474976710652, secrets.last().unwrap().clone()).is_err());
825 // insert_secret #3 incorrect
826 monitor = CounterpartyCommitmentSecrets::new();
829 secrets.push([0; 32]);
830 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("7cc854b54e3e0dcdb010d7a3fee464a9687be6e8db3be6854c475621e007a5dc").unwrap());
831 monitor.provide_secret(281474976710655, secrets.last().unwrap().clone()).unwrap();
834 secrets.push([0; 32]);
835 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("c7518c8ae4660ed02894df8976fa1a3659c1a8b4b5bec0c4b872abeba4cb8964").unwrap());
836 monitor.provide_secret(281474976710654, secrets.last().unwrap().clone()).unwrap();
839 secrets.push([0; 32]);
840 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("c51a18b13e8527e579ec56365482c62f180b7d5760b46e9477dae59e87ed423a").unwrap());
841 monitor.provide_secret(281474976710653, secrets.last().unwrap().clone()).unwrap();
844 secrets.push([0; 32]);
845 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("27cddaa5624534cb6cb9d7da077cf2b22ab21e9b506fd4998a51d54502e99116").unwrap());
846 assert!(monitor.provide_secret(281474976710652, secrets.last().unwrap().clone()).is_err());
850 // insert_secret #4 incorrect (1,2,3 derived from incorrect)
851 monitor = CounterpartyCommitmentSecrets::new();
854 secrets.push([0; 32]);
855 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("02a40c85b6f28da08dfdbe0926c53fab2de6d28c10301f8f7c4073d5e42e3148").unwrap());
856 monitor.provide_secret(281474976710655, secrets.last().unwrap().clone()).unwrap();
859 secrets.push([0; 32]);
860 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("dddc3a8d14fddf2b68fa8c7fbad2748274937479dd0f8930d5ebb4ab6bd866a3").unwrap());
861 monitor.provide_secret(281474976710654, secrets.last().unwrap().clone()).unwrap();
864 secrets.push([0; 32]);
865 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("c51a18b13e8527e579ec56365482c62f180b7d5760b46e9477dae59e87ed423a").unwrap());
866 monitor.provide_secret(281474976710653, secrets.last().unwrap().clone()).unwrap();
869 secrets.push([0; 32]);
870 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("ba65d7b0ef55a3ba300d4e87af29868f394f8f138d78a7011669c79b37b936f4").unwrap());
871 monitor.provide_secret(281474976710652, secrets.last().unwrap().clone()).unwrap();
874 secrets.push([0; 32]);
875 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("c65716add7aa98ba7acb236352d665cab17345fe45b55fb879ff80e6bd0c41dd").unwrap());
876 monitor.provide_secret(281474976710651, secrets.last().unwrap().clone()).unwrap();
879 secrets.push([0; 32]);
880 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("969660042a28f32d9be17344e09374b379962d03db1574df5a8a5a47e19ce3f2").unwrap());
881 monitor.provide_secret(281474976710650, secrets.last().unwrap().clone()).unwrap();
884 secrets.push([0; 32]);
885 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("a5a64476122ca0925fb344bdc1854c1c0a59fc614298e50a33e331980a220f32").unwrap());
886 monitor.provide_secret(281474976710649, secrets.last().unwrap().clone()).unwrap();
889 secrets.push([0; 32]);
890 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("05cde6323d949933f7f7b78776bcc1ea6d9b31447732e3802e1f7ac44b650e17").unwrap());
891 assert!(monitor.provide_secret(281474976710648, secrets.last().unwrap().clone()).is_err());
895 // insert_secret #5 incorrect
896 monitor = CounterpartyCommitmentSecrets::new();
899 secrets.push([0; 32]);
900 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("7cc854b54e3e0dcdb010d7a3fee464a9687be6e8db3be6854c475621e007a5dc").unwrap());
901 monitor.provide_secret(281474976710655, secrets.last().unwrap().clone()).unwrap();
904 secrets.push([0; 32]);
905 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("c7518c8ae4660ed02894df8976fa1a3659c1a8b4b5bec0c4b872abeba4cb8964").unwrap());
906 monitor.provide_secret(281474976710654, secrets.last().unwrap().clone()).unwrap();
909 secrets.push([0; 32]);
910 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("2273e227a5b7449b6e70f1fb4652864038b1cbf9cd7c043a7d6456b7fc275ad8").unwrap());
911 monitor.provide_secret(281474976710653, secrets.last().unwrap().clone()).unwrap();
914 secrets.push([0; 32]);
915 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("27cddaa5624534cb6cb9d7da077cf2b22ab21e9b506fd4998a51d54502e99116").unwrap());
916 monitor.provide_secret(281474976710652, secrets.last().unwrap().clone()).unwrap();
919 secrets.push([0; 32]);
920 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("631373ad5f9ef654bb3dade742d09504c567edd24320d2fcd68e3cc47e2ff6a6").unwrap());
921 monitor.provide_secret(281474976710651, secrets.last().unwrap().clone()).unwrap();
924 secrets.push([0; 32]);
925 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("969660042a28f32d9be17344e09374b379962d03db1574df5a8a5a47e19ce3f2").unwrap());
926 assert!(monitor.provide_secret(281474976710650, secrets.last().unwrap().clone()).is_err());
930 // insert_secret #6 incorrect (5 derived from incorrect)
931 monitor = CounterpartyCommitmentSecrets::new();
934 secrets.push([0; 32]);
935 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("7cc854b54e3e0dcdb010d7a3fee464a9687be6e8db3be6854c475621e007a5dc").unwrap());
936 monitor.provide_secret(281474976710655, secrets.last().unwrap().clone()).unwrap();
939 secrets.push([0; 32]);
940 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("c7518c8ae4660ed02894df8976fa1a3659c1a8b4b5bec0c4b872abeba4cb8964").unwrap());
941 monitor.provide_secret(281474976710654, secrets.last().unwrap().clone()).unwrap();
944 secrets.push([0; 32]);
945 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("2273e227a5b7449b6e70f1fb4652864038b1cbf9cd7c043a7d6456b7fc275ad8").unwrap());
946 monitor.provide_secret(281474976710653, secrets.last().unwrap().clone()).unwrap();
949 secrets.push([0; 32]);
950 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("27cddaa5624534cb6cb9d7da077cf2b22ab21e9b506fd4998a51d54502e99116").unwrap());
951 monitor.provide_secret(281474976710652, secrets.last().unwrap().clone()).unwrap();
954 secrets.push([0; 32]);
955 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("631373ad5f9ef654bb3dade742d09504c567edd24320d2fcd68e3cc47e2ff6a6").unwrap());
956 monitor.provide_secret(281474976710651, secrets.last().unwrap().clone()).unwrap();
959 secrets.push([0; 32]);
960 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("b7e76a83668bde38b373970155c868a653304308f9896692f904a23731224bb1").unwrap());
961 monitor.provide_secret(281474976710650, secrets.last().unwrap().clone()).unwrap();
964 secrets.push([0; 32]);
965 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("a5a64476122ca0925fb344bdc1854c1c0a59fc614298e50a33e331980a220f32").unwrap());
966 monitor.provide_secret(281474976710649, secrets.last().unwrap().clone()).unwrap();
969 secrets.push([0; 32]);
970 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("05cde6323d949933f7f7b78776bcc1ea6d9b31447732e3802e1f7ac44b650e17").unwrap());
971 assert!(monitor.provide_secret(281474976710648, secrets.last().unwrap().clone()).is_err());
975 // insert_secret #7 incorrect
976 monitor = CounterpartyCommitmentSecrets::new();
979 secrets.push([0; 32]);
980 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("7cc854b54e3e0dcdb010d7a3fee464a9687be6e8db3be6854c475621e007a5dc").unwrap());
981 monitor.provide_secret(281474976710655, secrets.last().unwrap().clone()).unwrap();
984 secrets.push([0; 32]);
985 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("c7518c8ae4660ed02894df8976fa1a3659c1a8b4b5bec0c4b872abeba4cb8964").unwrap());
986 monitor.provide_secret(281474976710654, secrets.last().unwrap().clone()).unwrap();
989 secrets.push([0; 32]);
990 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("2273e227a5b7449b6e70f1fb4652864038b1cbf9cd7c043a7d6456b7fc275ad8").unwrap());
991 monitor.provide_secret(281474976710653, secrets.last().unwrap().clone()).unwrap();
994 secrets.push([0; 32]);
995 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("27cddaa5624534cb6cb9d7da077cf2b22ab21e9b506fd4998a51d54502e99116").unwrap());
996 monitor.provide_secret(281474976710652, secrets.last().unwrap().clone()).unwrap();
999 secrets.push([0; 32]);
1000 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("c65716add7aa98ba7acb236352d665cab17345fe45b55fb879ff80e6bd0c41dd").unwrap());
1001 monitor.provide_secret(281474976710651, secrets.last().unwrap().clone()).unwrap();
1004 secrets.push([0; 32]);
1005 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("969660042a28f32d9be17344e09374b379962d03db1574df5a8a5a47e19ce3f2").unwrap());
1006 monitor.provide_secret(281474976710650, secrets.last().unwrap().clone()).unwrap();
1009 secrets.push([0; 32]);
1010 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("e7971de736e01da8ed58b94c2fc216cb1dca9e326f3a96e7194fe8ea8af6c0a3").unwrap());
1011 monitor.provide_secret(281474976710649, secrets.last().unwrap().clone()).unwrap();
1014 secrets.push([0; 32]);
1015 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("05cde6323d949933f7f7b78776bcc1ea6d9b31447732e3802e1f7ac44b650e17").unwrap());
1016 assert!(monitor.provide_secret(281474976710648, secrets.last().unwrap().clone()).is_err());
1020 // insert_secret #8 incorrect
1021 monitor = CounterpartyCommitmentSecrets::new();
1024 secrets.push([0; 32]);
1025 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("7cc854b54e3e0dcdb010d7a3fee464a9687be6e8db3be6854c475621e007a5dc").unwrap());
1026 monitor.provide_secret(281474976710655, secrets.last().unwrap().clone()).unwrap();
1029 secrets.push([0; 32]);
1030 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("c7518c8ae4660ed02894df8976fa1a3659c1a8b4b5bec0c4b872abeba4cb8964").unwrap());
1031 monitor.provide_secret(281474976710654, secrets.last().unwrap().clone()).unwrap();
1034 secrets.push([0; 32]);
1035 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("2273e227a5b7449b6e70f1fb4652864038b1cbf9cd7c043a7d6456b7fc275ad8").unwrap());
1036 monitor.provide_secret(281474976710653, secrets.last().unwrap().clone()).unwrap();
1039 secrets.push([0; 32]);
1040 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("27cddaa5624534cb6cb9d7da077cf2b22ab21e9b506fd4998a51d54502e99116").unwrap());
1041 monitor.provide_secret(281474976710652, secrets.last().unwrap().clone()).unwrap();
1044 secrets.push([0; 32]);
1045 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("c65716add7aa98ba7acb236352d665cab17345fe45b55fb879ff80e6bd0c41dd").unwrap());
1046 monitor.provide_secret(281474976710651, secrets.last().unwrap().clone()).unwrap();
1049 secrets.push([0; 32]);
1050 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("969660042a28f32d9be17344e09374b379962d03db1574df5a8a5a47e19ce3f2").unwrap());
1051 monitor.provide_secret(281474976710650, secrets.last().unwrap().clone()).unwrap();
1054 secrets.push([0; 32]);
1055 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("a5a64476122ca0925fb344bdc1854c1c0a59fc614298e50a33e331980a220f32").unwrap());
1056 monitor.provide_secret(281474976710649, secrets.last().unwrap().clone()).unwrap();
1059 secrets.push([0; 32]);
1060 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("a7efbc61aac46d34f77778bac22c8a20c6a46ca460addc49009bda875ec88fa4").unwrap());
1061 assert!(monitor.provide_secret(281474976710648, secrets.last().unwrap().clone()).is_err());