use bitcoin::secp256k1;
use crate::chain::chaininterface::compute_feerate_sat_per_1000_weight;
-use crate::sign::{ChannelDerivationParameters, HTLCDescriptor, ChannelSigner, EntropySource, SignerProvider, WriteableEcdsaChannelSigner};
+use crate::sign::{ChannelDerivationParameters, HTLCDescriptor, ChannelSigner, EntropySource, SignerProvider, ecdsa::WriteableEcdsaChannelSigner};
use crate::ln::msgs::DecodeError;
use crate::ln::PaymentPreimage;
use crate::ln::chan_utils::{self, ChannelTransactionParameters, HTLCOutputInCommitment, HolderCommitmentTransaction};
use crate::chain::chaininterface::{ConfirmationTarget, FeeEstimator, BroadcasterInterface, LowerBoundedFeeEstimator};
use crate::chain::channelmonitor::{ANTI_REORG_DELAY, CLTV_SHARED_CLAIM_BUFFER};
use crate::chain::package::{PackageSolvingData, PackageTemplate};
+use crate::chain::transaction::MaybeSignedTransaction;
use crate::util::logger::Logger;
use crate::util::ser::{Readable, ReadableArgs, MaybeReadable, UpgradableRequired, Writer, Writeable, VecWriter};
/// control) onchain.
pub(crate) enum OnchainClaim {
/// A finalized transaction pending confirmation spending the output to claim.
- Tx(Transaction),
+ Tx(MaybeSignedTransaction),
/// An event yielded externally to signal additional inputs must be added to a transaction
/// pending confirmation spending the output to claim.
Event(ClaimEvent),
}
+/// Represents the different feerate strategies a pending request can use when generating a claim.
+pub(crate) enum FeerateStrategy {
+ /// We must reuse the most recently used feerate, if any.
+ RetryPrevious,
+ /// We must pick the highest between the most recently used and the current feerate estimate.
+ HighestOfPreviousOrNew,
+ /// We must force a bump of the most recently used feerate, either by using the current feerate
+ /// estimate if it's higher, or manually bumping.
+ ForceBump,
+}
+
/// OnchainTxHandler receives claiming requests, aggregates them if it's sound, broadcast and
/// do RBF bumping if possible.
#[derive(Clone)]
}
}
-impl<'a, 'b, ES: EntropySource, SP: SignerProvider> ReadableArgs<(&'a ES, &'b SP, u64, [u8; 32])> for OnchainTxHandler<SP::Signer> {
+impl<'a, 'b, ES: EntropySource, SP: SignerProvider> ReadableArgs<(&'a ES, &'b SP, u64, [u8; 32])> for OnchainTxHandler<SP::EcdsaSigner> {
fn read<R: io::Read>(reader: &mut R, args: (&'a ES, &'b SP, u64, [u8; 32])) -> Result<Self, DecodeError> {
let entropy_source = args.0;
let signer_provider = args.1;
signer.provide_channel_parameters(&channel_parameters);
let pending_claim_requests_len: u64 = Readable::read(reader)?;
- let mut pending_claim_requests = HashMap::with_capacity(cmp::min(pending_claim_requests_len as usize, MAX_ALLOC_SIZE / 128));
+ let mut pending_claim_requests = hash_map_with_capacity(cmp::min(pending_claim_requests_len as usize, MAX_ALLOC_SIZE / 128));
for _ in 0..pending_claim_requests_len {
pending_claim_requests.insert(Readable::read(reader)?, Readable::read(reader)?);
}
let claimable_outpoints_len: u64 = Readable::read(reader)?;
- let mut claimable_outpoints = HashMap::with_capacity(cmp::min(pending_claim_requests_len as usize, MAX_ALLOC_SIZE / 128));
+ let mut claimable_outpoints = hash_map_with_capacity(cmp::min(pending_claim_requests_len as usize, MAX_ALLOC_SIZE / 128));
for _ in 0..claimable_outpoints_len {
let outpoint = Readable::read(reader)?;
let ancestor_claim_txid = Readable::read(reader)?;
prev_holder_commitment: None,
signer,
channel_transaction_parameters: channel_parameters,
- pending_claim_requests: HashMap::new(),
- claimable_outpoints: HashMap::new(),
+ pending_claim_requests: new_hash_map(),
+ claimable_outpoints: new_hash_map(),
locktimed_packages: BTreeMap::new(),
onchain_events_awaiting_threshold_conf: Vec::new(),
pending_claim_events: Vec::new(),
/// feerate changes between blocks, and ensuring reliability if broadcasting fails. We recommend
/// invoking this every 30 seconds, or lower if running in an environment with spotty
/// connections, like on mobile.
- pub(crate) fn rebroadcast_pending_claims<B: Deref, F: Deref, L: Deref>(
- &mut self, current_height: u32, broadcaster: &B, fee_estimator: &LowerBoundedFeeEstimator<F>,
- logger: &L,
+ pub(super) fn rebroadcast_pending_claims<B: Deref, F: Deref, L: Logger>(
+ &mut self, current_height: u32, feerate_strategy: FeerateStrategy, broadcaster: &B,
+ fee_estimator: &LowerBoundedFeeEstimator<F>, logger: &L,
)
where
B::Target: BroadcasterInterface,
F::Target: FeeEstimator,
- L::Target: Logger,
{
let mut bump_requests = Vec::with_capacity(self.pending_claim_requests.len());
for (claim_id, request) in self.pending_claim_requests.iter() {
bump_requests.push((*claim_id, request.clone()));
}
for (claim_id, request) in bump_requests {
- self.generate_claim(current_height, &request, false /* force_feerate_bump */, fee_estimator, logger)
+ self.generate_claim(current_height, &request, &feerate_strategy, fee_estimator, logger)
.map(|(_, new_feerate, claim)| {
let mut bumped_feerate = false;
if let Some(mut_request) = self.pending_claim_requests.get_mut(&claim_id) {
}
match claim {
OnchainClaim::Tx(tx) => {
- let log_start = if bumped_feerate { "Broadcasting RBF-bumped" } else { "Rebroadcasting" };
- log_info!(logger, "{} onchain {}", log_start, log_tx!(tx));
- broadcaster.broadcast_transactions(&[&tx]);
+ if tx.is_fully_signed() {
+ let log_start = if bumped_feerate { "Broadcasting RBF-bumped" } else { "Rebroadcasting" };
+ log_info!(logger, "{} onchain {}", log_start, log_tx!(tx.0));
+ broadcaster.broadcast_transactions(&[&tx.0]);
+ } else {
+ log_info!(logger, "Waiting for signature of unsigned onchain transaction {}", tx.0.txid());
+ }
},
OnchainClaim::Event(event) => {
let log_start = if bumped_feerate { "Yielding fee-bumped" } else { "Replaying" };
///
/// Panics if there are signing errors, because signing operations in reaction to on-chain
/// events are not expected to fail, and if they do, we may lose funds.
- fn generate_claim<F: Deref, L: Deref>(
- &mut self, cur_height: u32, cached_request: &PackageTemplate, force_feerate_bump: bool,
+ fn generate_claim<F: Deref, L: Logger>(
+ &mut self, cur_height: u32, cached_request: &PackageTemplate, feerate_strategy: &FeerateStrategy,
fee_estimator: &LowerBoundedFeeEstimator<F>, logger: &L,
) -> Option<(u32, u64, OnchainClaim)>
- where
- F::Target: FeeEstimator,
- L::Target: Logger,
+ where F::Target: FeeEstimator,
{
let request_outpoints = cached_request.outpoints();
if request_outpoints.is_empty() {
if cached_request.is_malleable() {
if cached_request.requires_external_funding() {
let target_feerate_sat_per_1000_weight = cached_request.compute_package_feerate(
- fee_estimator, ConfirmationTarget::OnChainSweep, force_feerate_bump
+ fee_estimator, ConfirmationTarget::OnChainSweep, feerate_strategy,
);
if let Some(htlcs) = cached_request.construct_malleable_package_with_external_funding(self) {
return Some((
let predicted_weight = cached_request.package_weight(&self.destination_script);
if let Some((output_value, new_feerate)) = cached_request.compute_package_output(
predicted_weight, self.destination_script.dust_value().to_sat(),
- force_feerate_bump, fee_estimator, logger,
+ feerate_strategy, fee_estimator, logger,
) {
assert!(new_feerate != 0);
- let transaction = cached_request.finalize_malleable_package(
+ let transaction = cached_request.maybe_finalize_malleable_package(
cur_height, self, output_value, self.destination_script.clone(), logger
).unwrap();
- log_trace!(logger, "...with timer {} and feerate {}", new_timer, new_feerate);
- assert!(predicted_weight >= transaction.weight().to_wu());
+ assert!(predicted_weight >= transaction.0.weight().to_wu());
return Some((new_timer, new_feerate, OnchainClaim::Tx(transaction)));
}
} else {
// which require external funding.
let mut inputs = cached_request.inputs();
debug_assert_eq!(inputs.len(), 1);
- let tx = match cached_request.finalize_untractable_package(self, logger) {
+ let tx = match cached_request.maybe_finalize_untractable_package(self, logger) {
Some(tx) => tx,
None => return None,
};
// Commitment inputs with anchors support are the only untractable inputs supported
// thus far that require external funding.
PackageSolvingData::HolderFundingOutput(output) => {
- debug_assert_eq!(tx.txid(), self.holder_commitment.trust().txid(),
+ debug_assert_eq!(tx.0.txid(), self.holder_commitment.trust().txid(),
"Holder commitment transaction mismatch");
let conf_target = ConfirmationTarget::OnChainSweep;
let package_target_feerate_sat_per_1000_weight = cached_request
- .compute_package_feerate(fee_estimator, conf_target, force_feerate_bump);
+ .compute_package_feerate(fee_estimator, conf_target, feerate_strategy);
if let Some(input_amount_sat) = output.funding_amount {
- let fee_sat = input_amount_sat - tx.output.iter().map(|output| output.value).sum::<u64>();
+ let fee_sat = input_amount_sat - tx.0.output.iter().map(|output| output.value).sum::<u64>();
let commitment_tx_feerate_sat_per_1000_weight =
- compute_feerate_sat_per_1000_weight(fee_sat, tx.weight().to_wu());
+ compute_feerate_sat_per_1000_weight(fee_sat, tx.0.weight().to_wu());
if commitment_tx_feerate_sat_per_1000_weight >= package_target_feerate_sat_per_1000_weight {
- log_debug!(logger, "Pre-signed {} already has feerate {} sat/kW above required {} sat/kW",
- log_tx!(tx), commitment_tx_feerate_sat_per_1000_weight,
+ log_debug!(logger, "Pre-signed commitment {} already has feerate {} sat/kW above required {} sat/kW",
+ tx.0.txid(), commitment_tx_feerate_sat_per_1000_weight,
package_target_feerate_sat_per_1000_weight);
return Some((new_timer, 0, OnchainClaim::Tx(tx.clone())));
}
// We'll locate an anchor output we can spend within the commitment transaction.
let funding_pubkey = &self.channel_transaction_parameters.holder_pubkeys.funding_pubkey;
- match chan_utils::get_anchor_output(&tx, funding_pubkey) {
+ match chan_utils::get_anchor_output(&tx.0, funding_pubkey) {
// An anchor output was found, so we should yield a funding event externally.
Some((idx, _)) => {
// TODO: Use a lower confirmation target when both our and the
package_target_feerate_sat_per_1000_weight as u64,
OnchainClaim::Event(ClaimEvent::BumpCommitment {
package_target_feerate_sat_per_1000_weight,
- commitment_tx: tx.clone(),
+ commitment_tx: tx.0.clone(),
anchor_output_idx: idx,
}),
))
None
}
+ pub fn abandon_claim(&mut self, outpoint: &BitcoinOutPoint) {
+ let claim_id = self.claimable_outpoints.get(outpoint).map(|(claim_id, _)| *claim_id)
+ .or_else(|| {
+ self.pending_claim_requests.iter()
+ .find(|(_, claim)| claim.outpoints().iter().any(|claim_outpoint| *claim_outpoint == outpoint))
+ .map(|(claim_id, _)| *claim_id)
+ });
+ if let Some(claim_id) = claim_id {
+ if let Some(claim) = self.pending_claim_requests.remove(&claim_id) {
+ for outpoint in claim.outpoints() {
+ self.claimable_outpoints.remove(outpoint);
+ }
+ }
+ } else {
+ self.locktimed_packages.values_mut().for_each(|claims|
+ claims.retain(|claim| !claim.outpoints().iter().any(|claim_outpoint| *claim_outpoint == outpoint)));
+ }
+ }
+
/// Upon channelmonitor.block_connected(..) or upon provision of a preimage on the forward link
/// for this channel, provide new relevant on-chain transactions and/or new claim requests.
/// Together with `update_claims_view_from_matched_txn` this used to be named
/// `conf_height` represents the height at which the request was generated. This
/// does not need to equal the current blockchain tip height, which should be provided via
/// `cur_height`, however it must never be higher than `cur_height`.
- pub(crate) fn update_claims_view_from_requests<B: Deref, F: Deref, L: Deref>(
+ pub(super) fn update_claims_view_from_requests<B: Deref, F: Deref, L: Logger>(
&mut self, requests: Vec<PackageTemplate>, conf_height: u32, cur_height: u32,
broadcaster: &B, fee_estimator: &LowerBoundedFeeEstimator<F>, logger: &L
) where
B::Target: BroadcasterInterface,
F::Target: FeeEstimator,
- L::Target: Logger,
{
- log_debug!(logger, "Updating claims view at height {} with {} claim requests", cur_height, requests.len());
+ if !requests.is_empty() {
+ log_debug!(logger, "Updating claims view at height {} with {} claim requests", cur_height, requests.len());
+ }
+
let mut preprocessed_requests = Vec::with_capacity(requests.len());
let mut aggregated_request = None;
// Claim everything up to and including `cur_height`
let remaining_locked_packages = self.locktimed_packages.split_off(&(cur_height + 1));
+ if !self.locktimed_packages.is_empty() {
+ log_debug!(logger,
+ "Updating claims view at height {} with {} locked packages available for claim",
+ cur_height,
+ self.locktimed_packages.len());
+ }
for (pop_height, mut entry) in self.locktimed_packages.iter_mut() {
log_trace!(logger, "Restoring delayed claim of package(s) at their timelock at {}.", pop_height);
preprocessed_requests.append(&mut entry);
// height timer expiration (i.e in how many blocks we're going to take action).
for mut req in preprocessed_requests {
if let Some((new_timer, new_feerate, claim)) = self.generate_claim(
- cur_height, &req, true /* force_feerate_bump */, &*fee_estimator, &*logger,
+ cur_height, &req, &FeerateStrategy::ForceBump, &*fee_estimator, &*logger,
) {
req.set_timer(new_timer);
req.set_feerate(new_feerate);
// `OnchainClaim`.
let claim_id = match claim {
OnchainClaim::Tx(tx) => {
- log_info!(logger, "Broadcasting onchain {}", log_tx!(tx));
- broadcaster.broadcast_transactions(&[&tx]);
- ClaimId(tx.txid().to_byte_array())
+ if tx.is_fully_signed() {
+ log_info!(logger, "Broadcasting onchain {}", log_tx!(tx.0));
+ broadcaster.broadcast_transactions(&[&tx.0]);
+ } else {
+ log_info!(logger, "Waiting for signature of unsigned onchain transaction {}", tx.0.txid());
+ }
+ ClaimId(tx.0.txid().to_byte_array())
},
OnchainClaim::Event(claim_event) => {
log_info!(logger, "Yielding onchain event to spend inputs {:?}", req.outpoints());
claim_id
},
};
- debug_assert!(self.pending_claim_requests.get(&claim_id).is_none());
+ // Because fuzzing can cause hash collisions, we can end up with conflicting claim
+ // ids here, so we only assert when not fuzzing.
+ debug_assert!(cfg!(fuzzing) || self.pending_claim_requests.get(&claim_id).is_none());
for k in req.outpoints() {
log_info!(logger, "Registering claiming request for {}:{}", k.txid, k.vout);
self.claimable_outpoints.insert(k.clone(), (claim_id, conf_height));
/// `conf_height` represents the height at which the transactions in `txn_matched` were
/// confirmed. This does not need to equal the current blockchain tip height, which should be
/// provided via `cur_height`, however it must never be higher than `cur_height`.
- pub(crate) fn update_claims_view_from_matched_txn<B: Deref, F: Deref, L: Deref>(
+ pub(super) fn update_claims_view_from_matched_txn<B: Deref, F: Deref, L: Logger>(
&mut self, txn_matched: &[&Transaction], conf_height: u32, conf_hash: BlockHash,
cur_height: u32, broadcaster: &B, fee_estimator: &LowerBoundedFeeEstimator<F>, logger: &L
) where
B::Target: BroadcasterInterface,
F::Target: FeeEstimator,
- L::Target: Logger,
{
- log_debug!(logger, "Updating claims view at height {} with {} matched transactions in block {}", cur_height, txn_matched.len(), conf_height);
- let mut bump_candidates = HashMap::new();
+ let mut have_logged_intro = false;
+ let mut maybe_log_intro = || {
+ if !have_logged_intro {
+ log_debug!(logger, "Updating claims view at height {} with {} matched transactions in block {}", cur_height, txn_matched.len(), conf_height);
+ have_logged_intro = true;
+ }
+ };
+ let mut bump_candidates = new_hash_map();
+ if !txn_matched.is_empty() { maybe_log_intro(); }
for tx in txn_matched {
// Scan all input to verify is one of the outpoint spent is of interest for us
let mut claimed_outputs_material = Vec::new();
self.onchain_events_awaiting_threshold_conf.drain(..).collect::<Vec<_>>();
for entry in onchain_events_awaiting_threshold_conf {
if entry.has_reached_confirmation_threshold(cur_height) {
+ maybe_log_intro();
match entry.event {
OnchainEvent::Claim { claim_id } => {
// We may remove a whole set of claim outpoints here, as these one may have
}
// Build, bump and rebroadcast tx accordingly
- log_trace!(logger, "Bumping {} candidates", bump_candidates.len());
+ if !bump_candidates.is_empty() {
+ maybe_log_intro();
+ log_trace!(logger, "Bumping {} candidates", bump_candidates.len());
+ }
+
for (claim_id, request) in bump_candidates.iter() {
if let Some((new_timer, new_feerate, bump_claim)) = self.generate_claim(
- cur_height, &request, true /* force_feerate_bump */, &*fee_estimator, &*logger,
+ cur_height, &request, &FeerateStrategy::ForceBump, &*fee_estimator, &*logger,
) {
match bump_claim {
OnchainClaim::Tx(bump_tx) => {
- log_info!(logger, "Broadcasting RBF-bumped onchain {}", log_tx!(bump_tx));
- broadcaster.broadcast_transactions(&[&bump_tx]);
+ if bump_tx.is_fully_signed() {
+ log_info!(logger, "Broadcasting RBF-bumped onchain {}", log_tx!(bump_tx.0));
+ broadcaster.broadcast_transactions(&[&bump_tx.0]);
+ } else {
+ log_info!(logger, "Waiting for signature of RBF-bumped unsigned onchain transaction {}",
+ bump_tx.0.txid());
+ }
},
OnchainClaim::Event(claim_event) => {
log_info!(logger, "Yielding RBF-bumped onchain event to spend inputs {:?}", request.outpoints());
}
}
- pub(crate) fn transaction_unconfirmed<B: Deref, F: Deref, L: Deref>(
+ pub(super) fn transaction_unconfirmed<B: Deref, F: Deref, L: Logger>(
&mut self,
txid: &Txid,
broadcaster: B,
fee_estimator: &LowerBoundedFeeEstimator<F>,
- logger: L,
+ logger: &L,
) where
B::Target: BroadcasterInterface,
F::Target: FeeEstimator,
- L::Target: Logger,
{
let mut height = None;
for entry in self.onchain_events_awaiting_threshold_conf.iter() {
}
}
- pub(crate) fn block_disconnected<B: Deref, F: Deref, L: Deref>(&mut self, height: u32, broadcaster: B, fee_estimator: &LowerBoundedFeeEstimator<F>, logger: L)
+ pub(super) fn block_disconnected<B: Deref, F: Deref, L: Logger>(&mut self, height: u32, broadcaster: B, fee_estimator: &LowerBoundedFeeEstimator<F>, logger: &L)
where B::Target: BroadcasterInterface,
- F::Target: FeeEstimator,
- L::Target: Logger,
+ F::Target: FeeEstimator,
{
- let mut bump_candidates = HashMap::new();
+ let mut bump_candidates = new_hash_map();
let onchain_events_awaiting_threshold_conf =
self.onchain_events_awaiting_threshold_conf.drain(..).collect::<Vec<_>>();
for entry in onchain_events_awaiting_threshold_conf {
// `height` is the height being disconnected, so our `current_height` is 1 lower.
let current_height = height - 1;
if let Some((new_timer, new_feerate, bump_claim)) = self.generate_claim(
- current_height, &request, true /* force_feerate_bump */, fee_estimator, &&*logger
+ current_height, &request, &FeerateStrategy::ForceBump, fee_estimator, logger
) {
request.set_timer(new_timer);
request.set_feerate(new_feerate);
match bump_claim {
OnchainClaim::Tx(bump_tx) => {
- log_info!(logger, "Broadcasting onchain {}", log_tx!(bump_tx));
- broadcaster.broadcast_transactions(&[&bump_tx]);
+ if bump_tx.is_fully_signed() {
+ log_info!(logger, "Broadcasting onchain {}", log_tx!(bump_tx.0));
+ broadcaster.broadcast_transactions(&[&bump_tx.0]);
+ } else {
+ log_info!(logger, "Waiting for signature of unsigned onchain transaction {}", bump_tx.0.txid());
+ }
},
OnchainClaim::Event(claim_event) => {
log_info!(logger, "Yielding onchain event after reorg to spend inputs {:?}", request.outpoints());
self.claimable_outpoints.get(outpoint).is_some()
}
- pub(crate) fn get_relevant_txids(&self) -> Vec<(Txid, Option<BlockHash>)> {
- let mut txids: Vec<(Txid, Option<BlockHash>)> = self.onchain_events_awaiting_threshold_conf
+ pub(crate) fn get_relevant_txids(&self) -> Vec<(Txid, u32, Option<BlockHash>)> {
+ let mut txids: Vec<(Txid, u32, Option<BlockHash>)> = self.onchain_events_awaiting_threshold_conf
.iter()
- .map(|entry| (entry.txid, entry.block_hash))
+ .map(|entry| (entry.txid, entry.height, entry.block_hash))
.collect();
- txids.sort_unstable_by_key(|(txid, _)| *txid);
- txids.dedup();
+ txids.sort_unstable_by(|a, b| a.0.cmp(&b.0).then(b.1.cmp(&a.1)));
+ txids.dedup_by_key(|(txid, _, _)| *txid);
txids
}
&self.holder_commitment.trust().built_transaction().transaction
}
- //TODO: getting lastest holder transactions should be infallible and result in us "force-closing the channel", but we may
- // have empty holder commitment transaction if a ChannelMonitor is asked to force-close just after OutboundV1Channel::get_funding_created,
- // before providing a initial commitment transaction. For outbound channel, init ChannelMonitor at Channel::funding_signed, there is nothing
- // to monitor before.
- pub(crate) fn get_fully_signed_holder_tx(&mut self, funding_redeemscript: &Script) -> Transaction {
- let sig = self.signer.sign_holder_commitment(&self.holder_commitment, &self.secp_ctx).expect("signing holder commitment");
- self.holder_commitment.add_holder_sig(funding_redeemscript, sig)
+ pub(crate) fn get_maybe_signed_holder_tx(&mut self, funding_redeemscript: &Script) -> MaybeSignedTransaction {
+ let tx = self.signer.sign_holder_commitment(&self.holder_commitment, &self.secp_ctx)
+ .map(|sig| self.holder_commitment.add_holder_sig(funding_redeemscript, sig))
+ .unwrap_or_else(|_| self.get_unsigned_holder_commitment_tx().clone());
+ MaybeSignedTransaction(tx)
}
#[cfg(any(test, feature="unsafe_revoked_tx_signing"))]
self.holder_commitment.add_holder_sig(funding_redeemscript, sig)
}
- pub(crate) fn get_fully_signed_htlc_tx(&mut self, outp: &::bitcoin::OutPoint, preimage: &Option<PaymentPreimage>) -> Option<Transaction> {
+ pub(crate) fn get_maybe_signed_htlc_tx(&mut self, outp: &::bitcoin::OutPoint, preimage: &Option<PaymentPreimage>) -> Option<MaybeSignedTransaction> {
let get_signed_htlc_tx = |holder_commitment: &HolderCommitmentTransaction| {
let trusted_tx = holder_commitment.trust();
if trusted_tx.txid() != outp.txid {
preimage: preimage.clone(),
counterparty_sig: counterparty_htlc_sig.clone(),
};
- let htlc_sig = self.signer.sign_holder_htlc_transaction(&htlc_tx, 0, &htlc_descriptor, &self.secp_ctx).unwrap();
- htlc_tx.input[0].witness = trusted_tx.build_htlc_input_witness(
- htlc_idx, &counterparty_htlc_sig, &htlc_sig, preimage,
- );
- Some(htlc_tx)
+ if let Ok(htlc_sig) = self.signer.sign_holder_htlc_transaction(&htlc_tx, 0, &htlc_descriptor, &self.secp_ctx) {
+ htlc_tx.input[0].witness = trusted_tx.build_htlc_input_witness(
+ htlc_idx, &counterparty_htlc_sig, &htlc_sig, preimage,
+ );
+ }
+ Some(MaybeSignedTransaction(htlc_tx))
};
// Check if the HTLC spends from the current holder commitment first, or the previous.
projects / rust-lightning / blobdiff