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::{Decodable, Encodable};
9 use bitcoin::consensus::encode;
10 use bitcoin::util::bip143;
12 use bitcoin::hashes::{Hash, HashEngine};
13 use bitcoin::hashes::sha256::Hash as Sha256;
14 use bitcoin::hashes::ripemd160::Hash as Ripemd160;
15 use bitcoin::hash_types::{Txid, PubkeyHash};
17 use ln::channelmanager::{PaymentHash, PaymentPreimage};
18 use ln::msgs::DecodeError;
19 use util::ser::{Readable, Writeable, Writer, WriterWriteAdaptor};
22 use bitcoin::secp256k1::key::{SecretKey, PublicKey};
23 use bitcoin::secp256k1::{Secp256k1, Signature};
24 use bitcoin::secp256k1;
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 impl_writeable!(TxCreationKeys, 33*6,
268 { per_commitment_point, revocation_key, a_htlc_key, b_htlc_key, a_delayed_payment_key });
270 /// One counterparty's public keys which do not change over the life of a channel.
271 #[derive(Clone, PartialEq)]
272 pub struct ChannelPublicKeys {
273 /// The public key which is used to sign all commitment transactions, as it appears in the
274 /// on-chain channel lock-in 2-of-2 multisig output.
275 pub funding_pubkey: PublicKey,
276 /// The base point which is used (with derive_public_revocation_key) to derive per-commitment
277 /// revocation keys. The per-commitment revocation private key is then revealed by the owner of
278 /// a commitment transaction so that their counterparty can claim all available funds if they
279 /// broadcast an old state.
280 pub revocation_basepoint: PublicKey,
281 /// The public key which receives our immediately spendable primary channel balance in
282 /// remote-broadcasted commitment transactions. This key is static across every commitment
284 pub payment_point: PublicKey,
285 /// The base point which is used (with derive_public_key) to derive a per-commitment payment
286 /// public key which receives non-HTLC-encumbered funds which are only available for spending
287 /// after some delay (or can be claimed via the revocation path).
288 pub delayed_payment_basepoint: PublicKey,
289 /// The base point which is used (with derive_public_key) to derive a per-commitment public key
290 /// which is used to encumber HTLC-in-flight outputs.
291 pub htlc_basepoint: PublicKey,
294 impl_writeable!(ChannelPublicKeys, 33*5, {
296 revocation_basepoint,
298 delayed_payment_basepoint,
303 impl TxCreationKeys {
304 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_htlc_base: &PublicKey) -> Result<TxCreationKeys, secp256k1::Error> {
306 per_commitment_point: per_commitment_point.clone(),
307 revocation_key: derive_public_revocation_key(&secp_ctx, &per_commitment_point, &b_revocation_base)?,
308 a_htlc_key: derive_public_key(&secp_ctx, &per_commitment_point, &a_htlc_base)?,
309 b_htlc_key: derive_public_key(&secp_ctx, &per_commitment_point, &b_htlc_base)?,
310 a_delayed_payment_key: derive_public_key(&secp_ctx, &per_commitment_point, &a_delayed_payment_base)?,
315 /// Gets the "to_local" output redeemscript, ie the script which is time-locked or spendable by
316 /// the revocation key
317 pub(super) fn get_revokeable_redeemscript(revocation_key: &PublicKey, to_self_delay: u16, delayed_payment_key: &PublicKey) -> Script {
318 Builder::new().push_opcode(opcodes::all::OP_IF)
319 .push_slice(&revocation_key.serialize())
320 .push_opcode(opcodes::all::OP_ELSE)
321 .push_int(to_self_delay as i64)
322 .push_opcode(opcodes::all::OP_CSV)
323 .push_opcode(opcodes::all::OP_DROP)
324 .push_slice(&delayed_payment_key.serialize())
325 .push_opcode(opcodes::all::OP_ENDIF)
326 .push_opcode(opcodes::all::OP_CHECKSIG)
330 #[derive(Clone, PartialEq)]
331 /// Information about an HTLC as it appears in a commitment transaction
332 pub struct HTLCOutputInCommitment {
333 /// Whether the HTLC was "offered" (ie outbound in relation to this commitment transaction).
334 /// Note that this is not the same as whether it is ountbound *from us*. To determine that you
335 /// need to compare this value to whether the commitment transaction in question is that of
336 /// the remote party or our own.
338 /// The value, in msat, of the HTLC. The value as it appears in the commitment transaction is
339 /// this divided by 1000.
340 pub amount_msat: u64,
341 /// The CLTV lock-time at which this HTLC expires.
342 pub cltv_expiry: u32,
343 /// The hash of the preimage which unlocks this HTLC.
344 pub payment_hash: PaymentHash,
345 /// The position within the commitment transactions' outputs. This may be None if the value is
346 /// below the dust limit (in which case no output appears in the commitment transaction and the
347 /// value is spent to additional transaction fees).
348 pub transaction_output_index: Option<u32>,
351 impl_writeable!(HTLCOutputInCommitment, 1 + 8 + 4 + 32 + 5, {
356 transaction_output_index
360 pub(crate) fn get_htlc_redeemscript_with_explicit_keys(htlc: &HTLCOutputInCommitment, a_htlc_key: &PublicKey, b_htlc_key: &PublicKey, revocation_key: &PublicKey) -> Script {
361 let payment_hash160 = Ripemd160::hash(&htlc.payment_hash.0[..]).into_inner();
363 Builder::new().push_opcode(opcodes::all::OP_DUP)
364 .push_opcode(opcodes::all::OP_HASH160)
365 .push_slice(&PubkeyHash::hash(&revocation_key.serialize())[..])
366 .push_opcode(opcodes::all::OP_EQUAL)
367 .push_opcode(opcodes::all::OP_IF)
368 .push_opcode(opcodes::all::OP_CHECKSIG)
369 .push_opcode(opcodes::all::OP_ELSE)
370 .push_slice(&b_htlc_key.serialize()[..])
371 .push_opcode(opcodes::all::OP_SWAP)
372 .push_opcode(opcodes::all::OP_SIZE)
374 .push_opcode(opcodes::all::OP_EQUAL)
375 .push_opcode(opcodes::all::OP_NOTIF)
376 .push_opcode(opcodes::all::OP_DROP)
378 .push_opcode(opcodes::all::OP_SWAP)
379 .push_slice(&a_htlc_key.serialize()[..])
381 .push_opcode(opcodes::all::OP_CHECKMULTISIG)
382 .push_opcode(opcodes::all::OP_ELSE)
383 .push_opcode(opcodes::all::OP_HASH160)
384 .push_slice(&payment_hash160)
385 .push_opcode(opcodes::all::OP_EQUALVERIFY)
386 .push_opcode(opcodes::all::OP_CHECKSIG)
387 .push_opcode(opcodes::all::OP_ENDIF)
388 .push_opcode(opcodes::all::OP_ENDIF)
391 Builder::new().push_opcode(opcodes::all::OP_DUP)
392 .push_opcode(opcodes::all::OP_HASH160)
393 .push_slice(&PubkeyHash::hash(&revocation_key.serialize())[..])
394 .push_opcode(opcodes::all::OP_EQUAL)
395 .push_opcode(opcodes::all::OP_IF)
396 .push_opcode(opcodes::all::OP_CHECKSIG)
397 .push_opcode(opcodes::all::OP_ELSE)
398 .push_slice(&b_htlc_key.serialize()[..])
399 .push_opcode(opcodes::all::OP_SWAP)
400 .push_opcode(opcodes::all::OP_SIZE)
402 .push_opcode(opcodes::all::OP_EQUAL)
403 .push_opcode(opcodes::all::OP_IF)
404 .push_opcode(opcodes::all::OP_HASH160)
405 .push_slice(&payment_hash160)
406 .push_opcode(opcodes::all::OP_EQUALVERIFY)
408 .push_opcode(opcodes::all::OP_SWAP)
409 .push_slice(&a_htlc_key.serialize()[..])
411 .push_opcode(opcodes::all::OP_CHECKMULTISIG)
412 .push_opcode(opcodes::all::OP_ELSE)
413 .push_opcode(opcodes::all::OP_DROP)
414 .push_int(htlc.cltv_expiry as i64)
415 .push_opcode(opcodes::all::OP_CLTV)
416 .push_opcode(opcodes::all::OP_DROP)
417 .push_opcode(opcodes::all::OP_CHECKSIG)
418 .push_opcode(opcodes::all::OP_ENDIF)
419 .push_opcode(opcodes::all::OP_ENDIF)
424 /// note here that 'a_revocation_key' is generated using b_revocation_basepoint and a's
425 /// commitment secret. 'htlc' does *not* need to have its previous_output_index filled.
427 pub fn get_htlc_redeemscript(htlc: &HTLCOutputInCommitment, keys: &TxCreationKeys) -> Script {
428 get_htlc_redeemscript_with_explicit_keys(htlc, &keys.a_htlc_key, &keys.b_htlc_key, &keys.revocation_key)
431 /// Gets the redeemscript for a funding output from the two funding public keys.
432 /// Note that the order of funding public keys does not matter.
433 pub fn make_funding_redeemscript(a: &PublicKey, b: &PublicKey) -> Script {
434 let our_funding_key = a.serialize();
435 let their_funding_key = b.serialize();
437 let builder = Builder::new().push_opcode(opcodes::all::OP_PUSHNUM_2);
438 if our_funding_key[..] < their_funding_key[..] {
439 builder.push_slice(&our_funding_key)
440 .push_slice(&their_funding_key)
442 builder.push_slice(&their_funding_key)
443 .push_slice(&our_funding_key)
444 }.push_opcode(opcodes::all::OP_PUSHNUM_2).push_opcode(opcodes::all::OP_CHECKMULTISIG).into_script()
447 /// panics if htlc.transaction_output_index.is_none()!
448 pub fn build_htlc_transaction(prev_hash: &Txid, feerate_per_kw: u64, to_self_delay: u16, htlc: &HTLCOutputInCommitment, a_delayed_payment_key: &PublicKey, revocation_key: &PublicKey) -> Transaction {
449 let mut txins: Vec<TxIn> = Vec::new();
451 previous_output: OutPoint {
452 txid: prev_hash.clone(),
453 vout: htlc.transaction_output_index.expect("Can't build an HTLC transaction for a dust output"),
455 script_sig: Script::new(),
460 let total_fee = if htlc.offered {
461 feerate_per_kw * HTLC_TIMEOUT_TX_WEIGHT / 1000
463 feerate_per_kw * HTLC_SUCCESS_TX_WEIGHT / 1000
466 let mut txouts: Vec<TxOut> = Vec::new();
468 script_pubkey: get_revokeable_redeemscript(revocation_key, to_self_delay, a_delayed_payment_key).to_v0_p2wsh(),
469 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)
474 lock_time: if htlc.offered { htlc.cltv_expiry } else { 0 },
481 /// We use this to track local commitment transactions and put off signing them until we are ready
482 /// to broadcast. Eventually this will require a signer which is possibly external, but for now we
483 /// just pass in the SecretKeys required.
484 pub struct LocalCommitmentTransaction {
485 // TODO: We should migrate away from providing the transaction, instead providing enough to
486 // allow the ChannelKeys to construct it from scratch. Luckily we already have HTLC data here,
487 // so we're probably most of the way there.
488 /// The commitment transaction itself, in unsigned form.
489 pub unsigned_tx: Transaction,
490 /// Our counterparty's signature for the transaction, above.
491 pub their_sig: Signature,
492 // Which order the signatures should go in when constructing the final commitment tx witness.
493 // The user should be able to reconstruc this themselves, so we don't bother to expose it.
495 /// The key derivation parameters for this commitment transaction
496 pub local_keys: TxCreationKeys,
497 /// The feerate paid per 1000-weight-unit in this commitment transaction. This value is
498 /// controlled by the channel initiator.
499 pub feerate_per_kw: u64,
500 /// The HTLCs and remote htlc signatures which were included in this commitment transaction.
502 /// Note that this includes all HTLCs, including ones which were considered dust and not
503 /// actually included in the transaction as it appears on-chain, but who's value is burned as
504 /// fees and not included in the to_local or to_remote outputs.
506 /// The remote HTLC signatures in the second element will always be set for non-dust HTLCs, ie
507 /// those for which transaction_output_index.is_some().
508 pub per_htlc: Vec<(HTLCOutputInCommitment, Option<Signature>)>,
510 impl LocalCommitmentTransaction {
512 pub fn dummy() -> Self {
513 let dummy_input = TxIn {
514 previous_output: OutPoint {
515 txid: Default::default(),
518 script_sig: Default::default(),
522 let dummy_key = PublicKey::from_secret_key(&Secp256k1::new(), &SecretKey::from_slice(&[42; 32]).unwrap());
523 let dummy_sig = Secp256k1::new().sign(&secp256k1::Message::from_slice(&[42; 32]).unwrap(), &SecretKey::from_slice(&[42; 32]).unwrap());
525 unsigned_tx: Transaction {
527 input: vec![dummy_input],
531 their_sig: dummy_sig,
532 our_sig_first: false,
533 local_keys: TxCreationKeys {
534 per_commitment_point: dummy_key.clone(),
535 revocation_key: dummy_key.clone(),
536 a_htlc_key: dummy_key.clone(),
537 b_htlc_key: dummy_key.clone(),
538 a_delayed_payment_key: dummy_key.clone(),
545 /// Generate a new LocalCommitmentTransaction based on a raw commitment transaction,
546 /// remote signature and both parties keys
547 pub(crate) fn new_missing_local_sig(unsigned_tx: Transaction, their_sig: Signature, our_funding_key: &PublicKey, their_funding_key: &PublicKey, local_keys: TxCreationKeys, feerate_per_kw: u64, htlc_data: Vec<(HTLCOutputInCommitment, Option<Signature>)>) -> LocalCommitmentTransaction {
548 if unsigned_tx.input.len() != 1 { panic!("Tried to store a commitment transaction that had input count != 1!"); }
549 if unsigned_tx.input[0].witness.len() != 0 { panic!("Tried to store a signed commitment transaction?"); }
554 our_sig_first: our_funding_key.serialize()[..] < their_funding_key.serialize()[..],
561 /// Get the txid of the local commitment transaction contained in this
562 /// LocalCommitmentTransaction
563 pub fn txid(&self) -> Txid {
564 self.unsigned_tx.txid()
567 /// Gets our signature for the contained commitment transaction given our funding private key.
569 /// Funding key is your key included in the 2-2 funding_outpoint lock. Should be provided
570 /// by your ChannelKeys.
571 /// Funding redeemscript is script locking funding_outpoint. This is the mutlsig script
572 /// between your own funding key and your counterparty's. Currently, this is provided in
573 /// ChannelKeys::sign_local_commitment() calls directly.
574 /// Channel value is amount locked in funding_outpoint.
575 pub fn get_local_sig<T: secp256k1::Signing>(&self, funding_key: &SecretKey, funding_redeemscript: &Script, channel_value_satoshis: u64, secp_ctx: &Secp256k1<T>) -> Signature {
576 let sighash = hash_to_message!(&bip143::SighashComponents::new(&self.unsigned_tx)
577 .sighash_all(&self.unsigned_tx.input[0], funding_redeemscript, channel_value_satoshis)[..]);
578 secp_ctx.sign(&sighash, funding_key)
581 pub(crate) fn add_local_sig(&self, funding_redeemscript: &Script, our_sig: Signature) -> Transaction {
582 let mut tx = self.unsigned_tx.clone();
583 // First push the multisig dummy, note that due to BIP147 (NULLDUMMY) it must be a zero-length element.
584 tx.input[0].witness.push(Vec::new());
586 if self.our_sig_first {
587 tx.input[0].witness.push(our_sig.serialize_der().to_vec());
588 tx.input[0].witness.push(self.their_sig.serialize_der().to_vec());
590 tx.input[0].witness.push(self.their_sig.serialize_der().to_vec());
591 tx.input[0].witness.push(our_sig.serialize_der().to_vec());
593 tx.input[0].witness[1].push(SigHashType::All as u8);
594 tx.input[0].witness[2].push(SigHashType::All as u8);
596 tx.input[0].witness.push(funding_redeemscript.as_bytes().to_vec());
600 /// Get a signature for each HTLC which was included in the commitment transaction (ie for
601 /// which HTLCOutputInCommitment::transaction_output_index.is_some()).
603 /// The returned Vec has one entry for each HTLC, and in the same order. For HTLCs which were
604 /// considered dust and not included, a None entry exists, for all others a signature is
606 pub fn get_htlc_sigs<T: secp256k1::Signing + secp256k1::Verification>(&self, htlc_base_key: &SecretKey, local_csv: u16, secp_ctx: &Secp256k1<T>) -> Result<Vec<Option<Signature>>, ()> {
607 let txid = self.txid();
608 let mut ret = Vec::with_capacity(self.per_htlc.len());
609 let our_htlc_key = derive_private_key(secp_ctx, &self.local_keys.per_commitment_point, htlc_base_key).map_err(|_| ())?;
611 for this_htlc in self.per_htlc.iter() {
612 if this_htlc.0.transaction_output_index.is_some() {
613 let 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);
615 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);
617 let sighash = hash_to_message!(&bip143::SighashComponents::new(&htlc_tx).sighash_all(&htlc_tx.input[0], &htlc_redeemscript, this_htlc.0.amount_msat / 1000)[..]);
618 ret.push(Some(secp_ctx.sign(&sighash, &our_htlc_key)));
626 /// Gets a signed HTLC transaction given a preimage (for !htlc.offered) and the local HTLC transaction signature.
627 pub(crate) fn get_signed_htlc_tx(&self, htlc_index: usize, signature: &Signature, preimage: &Option<PaymentPreimage>, local_csv: u16) -> Transaction {
628 let txid = self.txid();
629 let this_htlc = &self.per_htlc[htlc_index];
630 assert!(this_htlc.0.transaction_output_index.is_some());
631 // if we don't have preimage for an HTLC-Success, we can't generate an HTLC transaction.
632 if !this_htlc.0.offered && preimage.is_none() { unreachable!(); }
633 // Further, we should never be provided the preimage for an HTLC-Timeout transaction.
634 if this_htlc.0.offered && preimage.is_some() { unreachable!(); }
636 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);
637 // Channel should have checked that we have a remote signature for this HTLC at
638 // creation, and we should have a sensible htlc transaction:
639 assert!(this_htlc.1.is_some());
641 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);
643 // First push the multisig dummy, note that due to BIP147 (NULLDUMMY) it must be a zero-length element.
644 htlc_tx.input[0].witness.push(Vec::new());
646 htlc_tx.input[0].witness.push(this_htlc.1.unwrap().serialize_der().to_vec());
647 htlc_tx.input[0].witness.push(signature.serialize_der().to_vec());
648 htlc_tx.input[0].witness[1].push(SigHashType::All as u8);
649 htlc_tx.input[0].witness[2].push(SigHashType::All as u8);
651 if this_htlc.0.offered {
652 // Due to BIP146 (MINIMALIF) this must be a zero-length element to relay.
653 htlc_tx.input[0].witness.push(Vec::new());
655 htlc_tx.input[0].witness.push(preimage.unwrap().0.to_vec());
658 htlc_tx.input[0].witness.push(htlc_redeemscript.as_bytes().to_vec());
662 impl PartialEq for LocalCommitmentTransaction {
663 // We dont care whether we are signed in equality comparison
664 fn eq(&self, o: &Self) -> bool {
665 self.txid() == o.txid()
668 impl Writeable for LocalCommitmentTransaction {
669 fn write<W: Writer>(&self, writer: &mut W) -> Result<(), ::std::io::Error> {
670 if let Err(e) = self.unsigned_tx.consensus_encode(&mut WriterWriteAdaptor(writer)) {
672 encode::Error::Io(e) => return Err(e),
673 _ => panic!("local tx must have been well-formed!"),
676 self.their_sig.write(writer)?;
677 self.our_sig_first.write(writer)?;
678 self.local_keys.write(writer)?;
679 self.feerate_per_kw.write(writer)?;
680 writer.write_all(&byte_utils::be64_to_array(self.per_htlc.len() as u64))?;
681 for &(ref htlc, ref sig) in self.per_htlc.iter() {
688 impl Readable for LocalCommitmentTransaction {
689 fn read<R: ::std::io::Read>(reader: &mut R) -> Result<Self, DecodeError> {
690 let unsigned_tx = match Transaction::consensus_decode(reader.by_ref()) {
693 encode::Error::Io(ioe) => return Err(DecodeError::Io(ioe)),
694 _ => return Err(DecodeError::InvalidValue),
697 let their_sig = Readable::read(reader)?;
698 let our_sig_first = Readable::read(reader)?;
699 let local_keys = Readable::read(reader)?;
700 let feerate_per_kw = Readable::read(reader)?;
701 let htlcs_count: u64 = Readable::read(reader)?;
702 let mut per_htlc = Vec::with_capacity(cmp::min(htlcs_count as usize, MAX_ALLOC_SIZE / mem::size_of::<(HTLCOutputInCommitment, Option<Signature>)>()));
703 for _ in 0..htlcs_count {
704 let htlc: HTLCOutputInCommitment = Readable::read(reader)?;
705 let sigs = Readable::read(reader)?;
706 per_htlc.push((htlc, sigs));
709 if unsigned_tx.input.len() != 1 {
710 // Ensure tx didn't hit the 0-input ambiguity case.
711 return Err(DecodeError::InvalidValue);
726 use super::CounterpartyCommitmentSecrets;
730 fn test_per_commitment_storage() {
731 // Test vectors from BOLT 3:
732 let mut secrets: Vec<[u8; 32]> = Vec::new();
735 macro_rules! test_secrets {
737 let mut idx = 281474976710655;
738 for secret in secrets.iter() {
739 assert_eq!(monitor.get_secret(idx).unwrap(), *secret);
742 assert_eq!(monitor.get_min_seen_secret(), idx + 1);
743 assert!(monitor.get_secret(idx).is_none());
748 // insert_secret correct sequence
749 monitor = CounterpartyCommitmentSecrets::new();
752 secrets.push([0; 32]);
753 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("7cc854b54e3e0dcdb010d7a3fee464a9687be6e8db3be6854c475621e007a5dc").unwrap());
754 monitor.provide_secret(281474976710655, secrets.last().unwrap().clone()).unwrap();
757 secrets.push([0; 32]);
758 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("c7518c8ae4660ed02894df8976fa1a3659c1a8b4b5bec0c4b872abeba4cb8964").unwrap());
759 monitor.provide_secret(281474976710654, secrets.last().unwrap().clone()).unwrap();
762 secrets.push([0; 32]);
763 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("2273e227a5b7449b6e70f1fb4652864038b1cbf9cd7c043a7d6456b7fc275ad8").unwrap());
764 monitor.provide_secret(281474976710653, secrets.last().unwrap().clone()).unwrap();
767 secrets.push([0; 32]);
768 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("27cddaa5624534cb6cb9d7da077cf2b22ab21e9b506fd4998a51d54502e99116").unwrap());
769 monitor.provide_secret(281474976710652, secrets.last().unwrap().clone()).unwrap();
772 secrets.push([0; 32]);
773 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("c65716add7aa98ba7acb236352d665cab17345fe45b55fb879ff80e6bd0c41dd").unwrap());
774 monitor.provide_secret(281474976710651, secrets.last().unwrap().clone()).unwrap();
777 secrets.push([0; 32]);
778 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("969660042a28f32d9be17344e09374b379962d03db1574df5a8a5a47e19ce3f2").unwrap());
779 monitor.provide_secret(281474976710650, secrets.last().unwrap().clone()).unwrap();
782 secrets.push([0; 32]);
783 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("a5a64476122ca0925fb344bdc1854c1c0a59fc614298e50a33e331980a220f32").unwrap());
784 monitor.provide_secret(281474976710649, secrets.last().unwrap().clone()).unwrap();
787 secrets.push([0; 32]);
788 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("05cde6323d949933f7f7b78776bcc1ea6d9b31447732e3802e1f7ac44b650e17").unwrap());
789 monitor.provide_secret(281474976710648, secrets.last().unwrap().clone()).unwrap();
794 // insert_secret #1 incorrect
795 monitor = CounterpartyCommitmentSecrets::new();
798 secrets.push([0; 32]);
799 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("02a40c85b6f28da08dfdbe0926c53fab2de6d28c10301f8f7c4073d5e42e3148").unwrap());
800 monitor.provide_secret(281474976710655, secrets.last().unwrap().clone()).unwrap();
803 secrets.push([0; 32]);
804 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("c7518c8ae4660ed02894df8976fa1a3659c1a8b4b5bec0c4b872abeba4cb8964").unwrap());
805 assert!(monitor.provide_secret(281474976710654, secrets.last().unwrap().clone()).is_err());
809 // insert_secret #2 incorrect (#1 derived from incorrect)
810 monitor = CounterpartyCommitmentSecrets::new();
813 secrets.push([0; 32]);
814 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("02a40c85b6f28da08dfdbe0926c53fab2de6d28c10301f8f7c4073d5e42e3148").unwrap());
815 monitor.provide_secret(281474976710655, secrets.last().unwrap().clone()).unwrap();
818 secrets.push([0; 32]);
819 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("dddc3a8d14fddf2b68fa8c7fbad2748274937479dd0f8930d5ebb4ab6bd866a3").unwrap());
820 monitor.provide_secret(281474976710654, secrets.last().unwrap().clone()).unwrap();
823 secrets.push([0; 32]);
824 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("2273e227a5b7449b6e70f1fb4652864038b1cbf9cd7c043a7d6456b7fc275ad8").unwrap());
825 monitor.provide_secret(281474976710653, secrets.last().unwrap().clone()).unwrap();
828 secrets.push([0; 32]);
829 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("27cddaa5624534cb6cb9d7da077cf2b22ab21e9b506fd4998a51d54502e99116").unwrap());
830 assert!(monitor.provide_secret(281474976710652, secrets.last().unwrap().clone()).is_err());
834 // insert_secret #3 incorrect
835 monitor = CounterpartyCommitmentSecrets::new();
838 secrets.push([0; 32]);
839 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("7cc854b54e3e0dcdb010d7a3fee464a9687be6e8db3be6854c475621e007a5dc").unwrap());
840 monitor.provide_secret(281474976710655, secrets.last().unwrap().clone()).unwrap();
843 secrets.push([0; 32]);
844 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("c7518c8ae4660ed02894df8976fa1a3659c1a8b4b5bec0c4b872abeba4cb8964").unwrap());
845 monitor.provide_secret(281474976710654, secrets.last().unwrap().clone()).unwrap();
848 secrets.push([0; 32]);
849 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("c51a18b13e8527e579ec56365482c62f180b7d5760b46e9477dae59e87ed423a").unwrap());
850 monitor.provide_secret(281474976710653, secrets.last().unwrap().clone()).unwrap();
853 secrets.push([0; 32]);
854 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("27cddaa5624534cb6cb9d7da077cf2b22ab21e9b506fd4998a51d54502e99116").unwrap());
855 assert!(monitor.provide_secret(281474976710652, secrets.last().unwrap().clone()).is_err());
859 // insert_secret #4 incorrect (1,2,3 derived from incorrect)
860 monitor = CounterpartyCommitmentSecrets::new();
863 secrets.push([0; 32]);
864 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("02a40c85b6f28da08dfdbe0926c53fab2de6d28c10301f8f7c4073d5e42e3148").unwrap());
865 monitor.provide_secret(281474976710655, secrets.last().unwrap().clone()).unwrap();
868 secrets.push([0; 32]);
869 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("dddc3a8d14fddf2b68fa8c7fbad2748274937479dd0f8930d5ebb4ab6bd866a3").unwrap());
870 monitor.provide_secret(281474976710654, secrets.last().unwrap().clone()).unwrap();
873 secrets.push([0; 32]);
874 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("c51a18b13e8527e579ec56365482c62f180b7d5760b46e9477dae59e87ed423a").unwrap());
875 monitor.provide_secret(281474976710653, secrets.last().unwrap().clone()).unwrap();
878 secrets.push([0; 32]);
879 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("ba65d7b0ef55a3ba300d4e87af29868f394f8f138d78a7011669c79b37b936f4").unwrap());
880 monitor.provide_secret(281474976710652, secrets.last().unwrap().clone()).unwrap();
883 secrets.push([0; 32]);
884 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("c65716add7aa98ba7acb236352d665cab17345fe45b55fb879ff80e6bd0c41dd").unwrap());
885 monitor.provide_secret(281474976710651, secrets.last().unwrap().clone()).unwrap();
888 secrets.push([0; 32]);
889 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("969660042a28f32d9be17344e09374b379962d03db1574df5a8a5a47e19ce3f2").unwrap());
890 monitor.provide_secret(281474976710650, secrets.last().unwrap().clone()).unwrap();
893 secrets.push([0; 32]);
894 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("a5a64476122ca0925fb344bdc1854c1c0a59fc614298e50a33e331980a220f32").unwrap());
895 monitor.provide_secret(281474976710649, secrets.last().unwrap().clone()).unwrap();
898 secrets.push([0; 32]);
899 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("05cde6323d949933f7f7b78776bcc1ea6d9b31447732e3802e1f7ac44b650e17").unwrap());
900 assert!(monitor.provide_secret(281474976710648, secrets.last().unwrap().clone()).is_err());
904 // insert_secret #5 incorrect
905 monitor = CounterpartyCommitmentSecrets::new();
908 secrets.push([0; 32]);
909 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("7cc854b54e3e0dcdb010d7a3fee464a9687be6e8db3be6854c475621e007a5dc").unwrap());
910 monitor.provide_secret(281474976710655, secrets.last().unwrap().clone()).unwrap();
913 secrets.push([0; 32]);
914 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("c7518c8ae4660ed02894df8976fa1a3659c1a8b4b5bec0c4b872abeba4cb8964").unwrap());
915 monitor.provide_secret(281474976710654, secrets.last().unwrap().clone()).unwrap();
918 secrets.push([0; 32]);
919 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("2273e227a5b7449b6e70f1fb4652864038b1cbf9cd7c043a7d6456b7fc275ad8").unwrap());
920 monitor.provide_secret(281474976710653, secrets.last().unwrap().clone()).unwrap();
923 secrets.push([0; 32]);
924 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("27cddaa5624534cb6cb9d7da077cf2b22ab21e9b506fd4998a51d54502e99116").unwrap());
925 monitor.provide_secret(281474976710652, secrets.last().unwrap().clone()).unwrap();
928 secrets.push([0; 32]);
929 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("631373ad5f9ef654bb3dade742d09504c567edd24320d2fcd68e3cc47e2ff6a6").unwrap());
930 monitor.provide_secret(281474976710651, secrets.last().unwrap().clone()).unwrap();
933 secrets.push([0; 32]);
934 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("969660042a28f32d9be17344e09374b379962d03db1574df5a8a5a47e19ce3f2").unwrap());
935 assert!(monitor.provide_secret(281474976710650, secrets.last().unwrap().clone()).is_err());
939 // insert_secret #6 incorrect (5 derived from incorrect)
940 monitor = CounterpartyCommitmentSecrets::new();
943 secrets.push([0; 32]);
944 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("7cc854b54e3e0dcdb010d7a3fee464a9687be6e8db3be6854c475621e007a5dc").unwrap());
945 monitor.provide_secret(281474976710655, secrets.last().unwrap().clone()).unwrap();
948 secrets.push([0; 32]);
949 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("c7518c8ae4660ed02894df8976fa1a3659c1a8b4b5bec0c4b872abeba4cb8964").unwrap());
950 monitor.provide_secret(281474976710654, secrets.last().unwrap().clone()).unwrap();
953 secrets.push([0; 32]);
954 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("2273e227a5b7449b6e70f1fb4652864038b1cbf9cd7c043a7d6456b7fc275ad8").unwrap());
955 monitor.provide_secret(281474976710653, secrets.last().unwrap().clone()).unwrap();
958 secrets.push([0; 32]);
959 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("27cddaa5624534cb6cb9d7da077cf2b22ab21e9b506fd4998a51d54502e99116").unwrap());
960 monitor.provide_secret(281474976710652, secrets.last().unwrap().clone()).unwrap();
963 secrets.push([0; 32]);
964 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("631373ad5f9ef654bb3dade742d09504c567edd24320d2fcd68e3cc47e2ff6a6").unwrap());
965 monitor.provide_secret(281474976710651, secrets.last().unwrap().clone()).unwrap();
968 secrets.push([0; 32]);
969 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("b7e76a83668bde38b373970155c868a653304308f9896692f904a23731224bb1").unwrap());
970 monitor.provide_secret(281474976710650, secrets.last().unwrap().clone()).unwrap();
973 secrets.push([0; 32]);
974 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("a5a64476122ca0925fb344bdc1854c1c0a59fc614298e50a33e331980a220f32").unwrap());
975 monitor.provide_secret(281474976710649, secrets.last().unwrap().clone()).unwrap();
978 secrets.push([0; 32]);
979 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("05cde6323d949933f7f7b78776bcc1ea6d9b31447732e3802e1f7ac44b650e17").unwrap());
980 assert!(monitor.provide_secret(281474976710648, secrets.last().unwrap().clone()).is_err());
984 // insert_secret #7 incorrect
985 monitor = CounterpartyCommitmentSecrets::new();
988 secrets.push([0; 32]);
989 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("7cc854b54e3e0dcdb010d7a3fee464a9687be6e8db3be6854c475621e007a5dc").unwrap());
990 monitor.provide_secret(281474976710655, secrets.last().unwrap().clone()).unwrap();
993 secrets.push([0; 32]);
994 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("c7518c8ae4660ed02894df8976fa1a3659c1a8b4b5bec0c4b872abeba4cb8964").unwrap());
995 monitor.provide_secret(281474976710654, secrets.last().unwrap().clone()).unwrap();
998 secrets.push([0; 32]);
999 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("2273e227a5b7449b6e70f1fb4652864038b1cbf9cd7c043a7d6456b7fc275ad8").unwrap());
1000 monitor.provide_secret(281474976710653, secrets.last().unwrap().clone()).unwrap();
1003 secrets.push([0; 32]);
1004 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("27cddaa5624534cb6cb9d7da077cf2b22ab21e9b506fd4998a51d54502e99116").unwrap());
1005 monitor.provide_secret(281474976710652, secrets.last().unwrap().clone()).unwrap();
1008 secrets.push([0; 32]);
1009 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("c65716add7aa98ba7acb236352d665cab17345fe45b55fb879ff80e6bd0c41dd").unwrap());
1010 monitor.provide_secret(281474976710651, secrets.last().unwrap().clone()).unwrap();
1013 secrets.push([0; 32]);
1014 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("969660042a28f32d9be17344e09374b379962d03db1574df5a8a5a47e19ce3f2").unwrap());
1015 monitor.provide_secret(281474976710650, secrets.last().unwrap().clone()).unwrap();
1018 secrets.push([0; 32]);
1019 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("e7971de736e01da8ed58b94c2fc216cb1dca9e326f3a96e7194fe8ea8af6c0a3").unwrap());
1020 monitor.provide_secret(281474976710649, secrets.last().unwrap().clone()).unwrap();
1023 secrets.push([0; 32]);
1024 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("05cde6323d949933f7f7b78776bcc1ea6d9b31447732e3802e1f7ac44b650e17").unwrap());
1025 assert!(monitor.provide_secret(281474976710648, secrets.last().unwrap().clone()).is_err());
1029 // insert_secret #8 incorrect
1030 monitor = CounterpartyCommitmentSecrets::new();
1033 secrets.push([0; 32]);
1034 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("7cc854b54e3e0dcdb010d7a3fee464a9687be6e8db3be6854c475621e007a5dc").unwrap());
1035 monitor.provide_secret(281474976710655, secrets.last().unwrap().clone()).unwrap();
1038 secrets.push([0; 32]);
1039 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("c7518c8ae4660ed02894df8976fa1a3659c1a8b4b5bec0c4b872abeba4cb8964").unwrap());
1040 monitor.provide_secret(281474976710654, secrets.last().unwrap().clone()).unwrap();
1043 secrets.push([0; 32]);
1044 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("2273e227a5b7449b6e70f1fb4652864038b1cbf9cd7c043a7d6456b7fc275ad8").unwrap());
1045 monitor.provide_secret(281474976710653, secrets.last().unwrap().clone()).unwrap();
1048 secrets.push([0; 32]);
1049 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("27cddaa5624534cb6cb9d7da077cf2b22ab21e9b506fd4998a51d54502e99116").unwrap());
1050 monitor.provide_secret(281474976710652, secrets.last().unwrap().clone()).unwrap();
1053 secrets.push([0; 32]);
1054 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("c65716add7aa98ba7acb236352d665cab17345fe45b55fb879ff80e6bd0c41dd").unwrap());
1055 monitor.provide_secret(281474976710651, secrets.last().unwrap().clone()).unwrap();
1058 secrets.push([0; 32]);
1059 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("969660042a28f32d9be17344e09374b379962d03db1574df5a8a5a47e19ce3f2").unwrap());
1060 monitor.provide_secret(281474976710650, secrets.last().unwrap().clone()).unwrap();
1063 secrets.push([0; 32]);
1064 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("a5a64476122ca0925fb344bdc1854c1c0a59fc614298e50a33e331980a220f32").unwrap());
1065 monitor.provide_secret(281474976710649, secrets.last().unwrap().clone()).unwrap();
1068 secrets.push([0; 32]);
1069 secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("a7efbc61aac46d34f77778bac22c8a20c6a46ca460addc49009bda875ec88fa4").unwrap());
1070 assert!(monitor.provide_secret(281474976710648, secrets.last().unwrap().clone()).is_err());