use crate::ln::{PaymentHash, PaymentPreimage};
use crate::ln::msgs::DecodeError;
use crate::ln::chan_utils;
-use crate::ln::chan_utils::{CounterpartyCommitmentSecrets, HTLCOutputInCommitment, HTLCClaim, ChannelTransactionParameters, HolderCommitmentTransaction};
+use crate::ln::chan_utils::{CommitmentTransaction, CounterpartyCommitmentSecrets, HTLCOutputInCommitment, HTLCClaim, ChannelTransactionParameters, HolderCommitmentTransaction, TxCreationKeys};
use crate::ln::channelmanager::{HTLCSource, SentHTLCId};
use crate::chain;
use crate::chain::{BestBlock, WatchedOutput};
htlc_outputs: Vec<(HTLCOutputInCommitment, Option<Box<HTLCSource>>)>,
commitment_number: u64,
their_per_commitment_point: PublicKey,
+ feerate_per_kw: Option<u32>,
+ to_broadcaster_value_sat: Option<u64>,
+ to_countersignatory_value_sat: Option<u64>,
},
PaymentPreimage {
payment_preimage: PaymentPreimage,
},
(1, LatestCounterpartyCommitmentTXInfo) => {
(0, commitment_txid, required),
+ (1, feerate_per_kw, option),
(2, commitment_number, required),
+ (3, to_broadcaster_value_sat, option),
(4, their_per_commitment_point, required),
+ (5, to_countersignatory_value_sat, option),
(6, htlc_outputs, required_vec),
},
(2, PaymentPreimage) => {
ret
}
+ /// Gets all of the counterparty commitment transactions provided by the given update. This
+ /// may be empty if the update doesn't include any new counterparty commitments. Returned
+ /// commitment transactions are unsigned.
+ ///
+ /// This is provided so that watchtower clients in the persistence pipeline are able to build
+ /// justice transactions for each counterparty commitment upon each update. It's intended to be
+ /// used within an implementation of [`Persist::update_persisted_channel`], which is provided
+ /// with a monitor and an update.
+ ///
+ /// It is expected that a watchtower client may use this method to retrieve the latest counterparty
+ /// commitment transaction(s), and then hold the necessary data until a later update in which
+ /// the monitor has been updated with the corresponding revocation data, at which point the
+ /// monitor can sign the justice transaction.
+ ///
+ /// This will only return a non-empty list for monitor updates that have been created after
+ /// upgrading to LDK 0.0.117+. Note that no restriction lies on the monitors themselves, which
+ /// may have been created prior to upgrading.
+ ///
+ /// [`Persist::update_persisted_channel`]: crate::chain::chainmonitor::Persist::update_persisted_channel
+ pub fn counterparty_commitment_txs_from_update(&self, update: &ChannelMonitorUpdate) -> Vec<CommitmentTransaction> {
+ self.inner.lock().unwrap().counterparty_commitment_txs_from_update(update)
+ }
+
pub(crate) fn get_min_seen_secret(&self) -> u64 {
self.inner.lock().unwrap().get_min_seen_secret()
}
ret = Err(());
}
}
- ChannelMonitorUpdateStep::LatestCounterpartyCommitmentTXInfo { commitment_txid, htlc_outputs, commitment_number, their_per_commitment_point } => {
+ ChannelMonitorUpdateStep::LatestCounterpartyCommitmentTXInfo { commitment_txid, htlc_outputs, commitment_number, their_per_commitment_point, .. } => {
log_trace!(logger, "Updating ChannelMonitor with latest counterparty commitment transaction info");
self.provide_latest_counterparty_commitment_tx(*commitment_txid, htlc_outputs.clone(), *commitment_number, *their_per_commitment_point, logger)
},
}
}
+ #[cfg(debug_assertions)] {
+ self.counterparty_commitment_txs_from_update(updates);
+ }
+
// If the updates succeeded and we were in an already closed channel state, then there's no
// need to refuse any updates we expect to receive afer seeing a confirmed commitment.
if ret.is_ok() && updates.update_id == CLOSED_CHANNEL_UPDATE_ID && self.latest_update_id == updates.update_id {
ret
}
+ fn build_counterparty_commitment_tx(
+ &self, commitment_number: u64, their_per_commitment_point: &PublicKey,
+ to_broadcaster_value: u64, to_countersignatory_value: u64, feerate_per_kw: u32,
+ mut nondust_htlcs: Vec<(HTLCOutputInCommitment, Option<Box<HTLCSource>>)>
+ ) -> CommitmentTransaction {
+ let broadcaster_keys = &self.onchain_tx_handler.channel_transaction_parameters
+ .counterparty_parameters.as_ref().unwrap().pubkeys;
+ let countersignatory_keys =
+ &self.onchain_tx_handler.channel_transaction_parameters.holder_pubkeys;
+
+ let broadcaster_funding_key = broadcaster_keys.funding_pubkey;
+ let countersignatory_funding_key = countersignatory_keys.funding_pubkey;
+ let keys = TxCreationKeys::from_channel_static_keys(&their_per_commitment_point,
+ &broadcaster_keys, &countersignatory_keys, &self.onchain_tx_handler.secp_ctx);
+ let channel_parameters =
+ &self.onchain_tx_handler.channel_transaction_parameters.as_counterparty_broadcastable();
+
+ CommitmentTransaction::new_with_auxiliary_htlc_data(commitment_number,
+ to_broadcaster_value, to_countersignatory_value, broadcaster_funding_key,
+ countersignatory_funding_key, keys, feerate_per_kw, &mut nondust_htlcs,
+ channel_parameters)
+ }
+
+ pub(crate) fn counterparty_commitment_txs_from_update(&self, update: &ChannelMonitorUpdate) -> Vec<CommitmentTransaction> {
+ update.updates.iter().filter_map(|update| {
+ match update {
+ &ChannelMonitorUpdateStep::LatestCounterpartyCommitmentTXInfo { commitment_txid,
+ ref htlc_outputs, commitment_number, their_per_commitment_point,
+ feerate_per_kw: Some(feerate_per_kw),
+ to_broadcaster_value_sat: Some(to_broadcaster_value),
+ to_countersignatory_value_sat: Some(to_countersignatory_value) } => {
+
+ let nondust_htlcs = htlc_outputs.iter().filter_map(|(htlc, _)| {
+ htlc.transaction_output_index.map(|_| (htlc.clone(), None))
+ }).collect::<Vec<_>>();
+
+ let commitment_tx = self.build_counterparty_commitment_tx(commitment_number,
+ &their_per_commitment_point, to_broadcaster_value,
+ to_countersignatory_value, feerate_per_kw, nondust_htlcs);
+
+ debug_assert_eq!(commitment_tx.trust().txid(), commitment_txid);
+
+ Some(commitment_tx)
+ },
+ _ => None,
+ }
+ }).collect()
+ }
+
/// Can only fail if idx is < get_min_seen_secret
fn get_secret(&self, idx: u64) -> Option<[u8; 32]> {
self.commitment_secrets.get_secret(idx)
projects / rust-lightning / blobdiff