Committed,
/// Remote removed this (outbound) HTLC. We're waiting on their commitment_signed to finalize
/// the change (though they'll need to revoke before we fail the payment).
- RemoteRemoved(Option<HTLCFailReason>),
+ RemoteRemoved(OutboundHTLCOutcome),
/// Remote removed this and sent a commitment_signed (implying we've revoke_and_ack'ed it), but
/// the remote side hasn't yet revoked their previous state, which we need them to do before we
/// can do any backwards failing. Implies AwaitingRemoteRevoke.
/// We also have not yet removed this HTLC in a commitment_signed message, and are waiting on a
/// remote revoke_and_ack on a previous state before we can do so.
- AwaitingRemoteRevokeToRemove(Option<HTLCFailReason>),
+ AwaitingRemoteRevokeToRemove(OutboundHTLCOutcome),
/// Remote removed this and sent a commitment_signed (implying we've revoke_and_ack'ed it), but
/// the remote side hasn't yet revoked their previous state, which we need them to do before we
/// can do any backwards failing. Implies AwaitingRemoteRevoke.
/// We have removed this HTLC in our latest commitment_signed and are now just waiting on a
/// revoke_and_ack to drop completely.
- AwaitingRemovedRemoteRevoke(Option<HTLCFailReason>),
+ AwaitingRemovedRemoteRevoke(OutboundHTLCOutcome),
+}
+
+#[derive(Clone)]
+enum OutboundHTLCOutcome {
+ Success(Option<PaymentPreimage>),
+ Failure(HTLCFailReason),
+}
+
+impl From<Option<HTLCFailReason>> for OutboundHTLCOutcome {
+ fn from(o: Option<HTLCFailReason>) -> Self {
+ match o {
+ None => OutboundHTLCOutcome::Success(None),
+ Some(r) => OutboundHTLCOutcome::Failure(r)
+ }
+ }
+}
+
+impl<'a> Into<Option<&'a HTLCFailReason>> for &'a OutboundHTLCOutcome {
+ fn into(self) -> Option<&'a HTLCFailReason> {
+ match self {
+ OutboundHTLCOutcome::Success(_) => None,
+ OutboundHTLCOutcome::Failure(ref r) => Some(r)
+ }
+ }
}
struct OutboundHTLCOutput {
Disabled,
}
+/// We track when we sent an `AnnouncementSignatures` to our peer in a few states, described here.
+#[derive(PartialEq)]
+pub enum AnnouncementSigsState {
+ /// We have not sent our peer an `AnnouncementSignatures` yet, or our peer disconnected since
+ /// we sent the last `AnnouncementSignatures`.
+ NotSent,
+ /// We sent an `AnnouncementSignatures` to our peer since the last time our peer disconnected.
+ /// This state never appears on disk - instead we write `NotSent`.
+ MessageSent,
+ /// We sent a `CommitmentSigned` after the last `AnnouncementSignatures` we sent. Because we
+ /// only ever have a single `CommitmentSigned` pending at once, if we sent one after sending
+ /// `AnnouncementSignatures` then we know the peer received our `AnnouncementSignatures` if
+ /// they send back a `RevokeAndACK`.
+ /// This state never appears on disk - instead we write `NotSent`.
+ Committed,
+ /// We received a `RevokeAndACK`, effectively ack-ing our `AnnouncementSignatures`, at this
+ /// point we no longer need to re-send our `AnnouncementSignatures` again on reconnect.
+ PeerReceived,
+}
+
/// An enum indicating whether the local or remote side offered a given HTLC.
enum HTLCInitiator {
LocalOffered,
htlcs_included: Vec<(HTLCOutputInCommitment, Option<&'a HTLCSource>)>, // the list of HTLCs (dust HTLCs *included*) which were not ignored when building the transaction
local_balance_msat: u64, // local balance before fees but considering dust limits
remote_balance_msat: u64, // remote balance before fees but considering dust limits
+ preimages: Vec<PaymentPreimage>, // preimages for successful offered HTLCs since last commitment
}
/// Used when calculating whether we or the remote can afford an additional HTLC.
pub finalized_claimed_htlcs: Vec<HTLCSource>,
pub funding_broadcastable: Option<Transaction>,
pub funding_locked: Option<msgs::FundingLocked>,
+ pub announcement_sigs: Option<msgs::AnnouncementSignatures>,
+}
+
+/// The return value of `channel_reestablish`
+pub(super) struct ReestablishResponses {
+ pub funding_locked: Option<msgs::FundingLocked>,
+ pub raa: Option<msgs::RevokeAndACK>,
+ pub commitment_update: Option<msgs::CommitmentUpdate>,
+ pub order: RAACommitmentOrder,
+ pub mon_update: Option<ChannelMonitorUpdate>,
+ pub holding_cell_failed_htlcs: Vec<(HTLCSource, PaymentHash)>,
+ pub announcement_sigs: Option<msgs::AnnouncementSignatures>,
+ pub shutdown_msg: Option<msgs::Shutdown>,
}
/// If the majority of the channels funds are to the fundee and the initiator holds only just
channel_id: [u8; 32],
channel_state: u32,
+
+ // When we reach max(6 blocks, minimum_depth), we need to send an AnnouncementSigs message to
+ // our peer. However, we want to make sure they received it, or else rebroadcast it when we
+ // next connect.
+ // We do so here, see `AnnouncementSigsSent` for more details on the state(s).
+ // Note that a number of our tests were written prior to the behavior here which retransmits
+ // AnnouncementSignatures until after an RAA completes, so the behavior is short-circuited in
+ // many tests.
+ #[cfg(any(test, feature = "_test_utils"))]
+ pub(crate) announcement_sigs_state: AnnouncementSigsState,
+ #[cfg(not(any(test, feature = "_test_utils")))]
+ announcement_sigs_state: AnnouncementSigsState,
+
secp_ctx: Secp256k1<secp256k1::All>,
channel_value_satoshis: u64,
channel_id: keys_provider.get_secure_random_bytes(),
channel_state: ChannelState::OurInitSent as u32,
+ announcement_sigs_state: AnnouncementSigsState::NotSent,
secp_ctx,
channel_value_satoshis,
fn check_remote_fee<F: Deref>(fee_estimator: &F, feerate_per_kw: u32) -> Result<(), ChannelError>
where F::Target: FeeEstimator
{
- let lower_limit = fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Background);
- // Some fee estimators round up to the next full sat/vbyte (ie 250 sats per kw), causing
- // occasional issues with feerate disagreements between an initiator that wants a feerate
- // of 1.1 sat/vbyte and a receiver that wants 1.1 rounded up to 2. Thus, we always add 250
- // sat/kw before the comparison here.
- if feerate_per_kw + 250 < lower_limit {
- return Err(ChannelError::Close(format!("Peer's feerate much too low. Actual: {}. Our expected lower limit: {} (- 250)", feerate_per_kw, lower_limit)));
- }
// We only bound the fee updates on the upper side to prevent completely absurd feerates,
// always accepting up to 25 sat/vByte or 10x our fee estimator's "High Priority" fee.
// We generally don't care too much if they set the feerate to something very high, but it
if feerate_per_kw as u64 > upper_limit {
return Err(ChannelError::Close(format!("Peer's feerate much too high. Actual: {}. Our expected upper limit: {}", feerate_per_kw, upper_limit)));
}
+ let lower_limit = fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Background);
+ // Some fee estimators round up to the next full sat/vbyte (ie 250 sats per kw), causing
+ // occasional issues with feerate disagreements between an initiator that wants a feerate
+ // of 1.1 sat/vbyte and a receiver that wants 1.1 rounded up to 2. Thus, we always add 250
+ // sat/kw before the comparison here.
+ if feerate_per_kw + 250 < lower_limit {
+ return Err(ChannelError::Close(format!("Peer's feerate much too low. Actual: {}. Our expected lower limit: {} (- 250)", feerate_per_kw, lower_limit)));
+ }
Ok(())
}
channel_id: msg.temporary_channel_id,
channel_state: (ChannelState::OurInitSent as u32) | (ChannelState::TheirInitSent as u32),
+ announcement_sigs_state: AnnouncementSigsState::NotSent,
secp_ctx,
latest_monitor_update_id: 0,
}
}
+ let mut preimages: Vec<PaymentPreimage> = Vec::new();
+
for ref htlc in self.pending_outbound_htlcs.iter() {
let (include, state_name) = match htlc.state {
OutboundHTLCState::LocalAnnounced(_) => (generated_by_local, "LocalAnnounced"),
OutboundHTLCState::AwaitingRemovedRemoteRevoke(_) => (false, "AwaitingRemovedRemoteRevoke"),
};
+ let preimage_opt = match htlc.state {
+ OutboundHTLCState::RemoteRemoved(OutboundHTLCOutcome::Success(p)) => p,
+ OutboundHTLCState::AwaitingRemoteRevokeToRemove(OutboundHTLCOutcome::Success(p)) => p,
+ OutboundHTLCState::AwaitingRemovedRemoteRevoke(OutboundHTLCOutcome::Success(p)) => p,
+ _ => None,
+ };
+
+ if let Some(preimage) = preimage_opt {
+ preimages.push(preimage);
+ }
+
if include {
add_htlc_output!(htlc, true, Some(&htlc.source), state_name);
local_htlc_total_msat += htlc.amount_msat;
} else {
log_trace!(logger, " ...not including outbound HTLC {} (hash {}) with value {} due to state ({})", htlc.htlc_id, log_bytes!(htlc.payment_hash.0), htlc.amount_msat, state_name);
match htlc.state {
- OutboundHTLCState::AwaitingRemoteRevokeToRemove(None)|OutboundHTLCState::AwaitingRemovedRemoteRevoke(None) => {
+ OutboundHTLCState::AwaitingRemoteRevokeToRemove(OutboundHTLCOutcome::Success(_))|OutboundHTLCState::AwaitingRemovedRemoteRevoke(OutboundHTLCOutcome::Success(_)) => {
value_to_self_msat_offset -= htlc.amount_msat as i64;
},
- OutboundHTLCState::RemoteRemoved(None) => {
+ OutboundHTLCState::RemoteRemoved(OutboundHTLCOutcome::Success(_)) => {
if !generated_by_local {
value_to_self_msat_offset -= htlc.amount_msat as i64;
}
htlcs_included,
local_balance_msat: value_to_self_msat as u64,
remote_balance_msat: value_to_remote_msat as u64,
+ preimages
}
}
log_trace!(logger, "Initial counterparty tx for channel {} is: txid {} tx {}",
log_bytes!(self.channel_id()), counterparty_initial_bitcoin_tx.txid, encode::serialize_hex(&counterparty_initial_bitcoin_tx.transaction));
- let counterparty_signature = self.holder_signer.sign_counterparty_commitment(&counterparty_initial_commitment_tx, &self.secp_ctx)
+ let counterparty_signature = self.holder_signer.sign_counterparty_commitment(&counterparty_initial_commitment_tx, Vec::new(), &self.secp_ctx)
.map_err(|_| ChannelError::Close("Failed to get signatures for new commitment_signed".to_owned()))?.0;
// We sign "counterparty" commitment transaction, allowing them to broadcast the tx if they wish.
self.counterparty_funding_pubkey()
);
- self.holder_signer.validate_holder_commitment(&holder_commitment_tx)
+ self.holder_signer.validate_holder_commitment(&holder_commitment_tx, Vec::new())
.map_err(|_| ChannelError::Close("Failed to validate our commitment".to_owned()))?;
// Now that we're past error-generating stuff, update our local state:
self.counterparty_funding_pubkey()
);
- self.holder_signer.validate_holder_commitment(&holder_commitment_tx)
+ self.holder_signer.validate_holder_commitment(&holder_commitment_tx, Vec::new())
.map_err(|_| ChannelError::Close("Failed to validate our commitment".to_owned()))?;
Ok((channel_monitor, self.funding_transaction.as_ref().cloned().unwrap()))
}
- pub fn funding_locked<L: Deref>(&mut self, msg: &msgs::FundingLocked, logger: &L) -> Result<(), ChannelError> where L::Target: Logger {
+ /// Handles a funding_locked message from our peer. If we've already sent our funding_locked
+ /// and the channel is now usable (and public), this may generate an announcement_signatures to
+ /// reply with.
+ pub fn funding_locked<L: Deref>(&mut self, msg: &msgs::FundingLocked, node_pk: PublicKey, genesis_block_hash: BlockHash, best_block: &BestBlock, logger: &L) -> Result<Option<msgs::AnnouncementSignatures>, ChannelError> where L::Target: Logger {
if self.channel_state & (ChannelState::PeerDisconnected as u32) == ChannelState::PeerDisconnected as u32 {
self.workaround_lnd_bug_4006 = Some(msg.clone());
return Err(ChannelError::Ignore("Peer sent funding_locked when we needed a channel_reestablish. The peer is likely lnd, see https://github.com/lightningnetwork/lnd/issues/4006".to_owned()));
return Err(ChannelError::Close("Peer sent a reconnect funding_locked with a different point".to_owned()));
}
// They probably disconnected/reconnected and re-sent the funding_locked, which is required
- return Ok(());
+ return Ok(None);
} else {
return Err(ChannelError::Close("Peer sent a funding_locked at a strange time".to_owned()));
}
log_info!(logger, "Received funding_locked from peer for channel {}", log_bytes!(self.channel_id()));
- Ok(())
+ Ok(self.get_announcement_sigs(node_pk, genesis_block_hash, best_block.height(), logger))
}
/// Returns transaction if there is pending funding transaction that is yet to broadcast
// transaction).
let mut removed_outbound_total_msat = 0;
for ref htlc in self.pending_outbound_htlcs.iter() {
- if let OutboundHTLCState::AwaitingRemoteRevokeToRemove(None) = htlc.state {
+ if let OutboundHTLCState::AwaitingRemoteRevokeToRemove(OutboundHTLCOutcome::Success(_)) = htlc.state {
removed_outbound_total_msat += htlc.amount_msat;
- } else if let OutboundHTLCState::AwaitingRemovedRemoteRevoke(None) = htlc.state {
+ } else if let OutboundHTLCState::AwaitingRemovedRemoteRevoke(OutboundHTLCOutcome::Success(_)) = htlc.state {
removed_outbound_total_msat += htlc.amount_msat;
}
}
/// Marks an outbound HTLC which we have received update_fail/fulfill/malformed
#[inline]
- fn mark_outbound_htlc_removed(&mut self, htlc_id: u64, check_preimage: Option<PaymentHash>, fail_reason: Option<HTLCFailReason>) -> Result<&OutboundHTLCOutput, ChannelError> {
+ fn mark_outbound_htlc_removed(&mut self, htlc_id: u64, check_preimage: Option<PaymentPreimage>, fail_reason: Option<HTLCFailReason>) -> Result<&OutboundHTLCOutput, ChannelError> {
+ assert!(!(check_preimage.is_some() && fail_reason.is_some()), "cannot fail while we have a preimage");
for htlc in self.pending_outbound_htlcs.iter_mut() {
if htlc.htlc_id == htlc_id {
- match check_preimage {
- None => {},
- Some(payment_hash) =>
+ let outcome = match check_preimage {
+ None => fail_reason.into(),
+ Some(payment_preimage) => {
+ let payment_hash = PaymentHash(Sha256::hash(&payment_preimage.0[..]).into_inner());
if payment_hash != htlc.payment_hash {
return Err(ChannelError::Close(format!("Remote tried to fulfill HTLC ({}) with an incorrect preimage", htlc_id)));
}
+ OutboundHTLCOutcome::Success(Some(payment_preimage))
+ }
};
match htlc.state {
OutboundHTLCState::LocalAnnounced(_) =>
return Err(ChannelError::Close(format!("Remote tried to fulfill/fail HTLC ({}) before it had been committed", htlc_id))),
OutboundHTLCState::Committed => {
- htlc.state = OutboundHTLCState::RemoteRemoved(fail_reason);
+ htlc.state = OutboundHTLCState::RemoteRemoved(outcome);
},
OutboundHTLCState::AwaitingRemoteRevokeToRemove(_) | OutboundHTLCState::AwaitingRemovedRemoteRevoke(_) | OutboundHTLCState::RemoteRemoved(_) =>
return Err(ChannelError::Close(format!("Remote tried to fulfill/fail HTLC ({}) that they'd already fulfilled/failed", htlc_id))),
return Err(ChannelError::Close("Peer sent update_fulfill_htlc when we needed a channel_reestablish".to_owned()));
}
- let payment_hash = PaymentHash(Sha256::hash(&msg.payment_preimage.0[..]).into_inner());
- self.mark_outbound_htlc_removed(msg.htlc_id, Some(payment_hash), None).map(|htlc| (htlc.source.clone(), htlc.amount_msat))
+ self.mark_outbound_htlc_removed(msg.htlc_id, Some(msg.payment_preimage), None).map(|htlc| (htlc.source.clone(), htlc.amount_msat))
}
pub fn update_fail_htlc(&mut self, msg: &msgs::UpdateFailHTLC, fail_reason: HTLCFailReason) -> Result<(), ChannelError> {
);
let next_per_commitment_point = self.holder_signer.get_per_commitment_point(self.cur_holder_commitment_transaction_number - 1, &self.secp_ctx);
- self.holder_signer.validate_holder_commitment(&holder_commitment_tx)
+ self.holder_signer.validate_holder_commitment(&holder_commitment_tx, commitment_stats.preimages)
.map_err(|_| (None, ChannelError::Close("Failed to validate our commitment".to_owned())))?;
let per_commitment_secret = self.holder_signer.release_commitment_secret(self.cur_holder_commitment_transaction_number + 1);
}
}
for htlc in self.pending_outbound_htlcs.iter_mut() {
- if let Some(fail_reason) = if let &mut OutboundHTLCState::RemoteRemoved(ref mut fail_reason) = &mut htlc.state {
- Some(fail_reason.take())
- } else { None } {
+ if let &mut OutboundHTLCState::RemoteRemoved(ref mut outcome) = &mut htlc.state {
log_trace!(logger, "Updating HTLC {} to AwaitingRemoteRevokeToRemove due to commitment_signed in channel {}.",
log_bytes!(htlc.payment_hash.0), log_bytes!(self.channel_id));
- htlc.state = OutboundHTLCState::AwaitingRemoteRevokeToRemove(fail_reason);
+ // Grab the preimage, if it exists, instead of cloning
+ let mut reason = OutboundHTLCOutcome::Success(None);
+ mem::swap(outcome, &mut reason);
+ htlc.state = OutboundHTLCState::AwaitingRemoteRevokeToRemove(reason);
need_commitment = true;
}
}
self.counterparty_cur_commitment_point = Some(msg.next_per_commitment_point);
self.cur_counterparty_commitment_transaction_number -= 1;
+ if self.announcement_sigs_state == AnnouncementSigsState::Committed {
+ self.announcement_sigs_state = AnnouncementSigsState::PeerReceived;
+ }
+
log_trace!(logger, "Updating HTLCs on receipt of RAA in channel {}...", log_bytes!(self.channel_id()));
let mut to_forward_infos = Vec::new();
let mut revoked_htlcs = Vec::new();
} else { true }
});
pending_outbound_htlcs.retain(|htlc| {
- if let &OutboundHTLCState::AwaitingRemovedRemoteRevoke(ref fail_reason) = &htlc.state {
+ if let &OutboundHTLCState::AwaitingRemovedRemoteRevoke(ref outcome) = &htlc.state {
log_trace!(logger, " ...removing outbound AwaitingRemovedRemoteRevoke {}", log_bytes!(htlc.payment_hash.0));
- if let Some(reason) = fail_reason.clone() { // We really want take() here, but, again, non-mut ref :(
+ if let OutboundHTLCOutcome::Failure(reason) = outcome.clone() { // We really want take() here, but, again, non-mut ref :(
revoked_htlcs.push((htlc.source.clone(), htlc.payment_hash, reason));
} else {
finalized_claimed_htlcs.push(htlc.source.clone());
log_trace!(logger, " ...promoting outbound LocalAnnounced {} to Committed", log_bytes!(htlc.payment_hash.0));
htlc.state = OutboundHTLCState::Committed;
}
- if let Some(fail_reason) = if let &mut OutboundHTLCState::AwaitingRemoteRevokeToRemove(ref mut fail_reason) = &mut htlc.state {
- Some(fail_reason.take())
- } else { None } {
+ if let &mut OutboundHTLCState::AwaitingRemoteRevokeToRemove(ref mut outcome) = &mut htlc.state {
log_trace!(logger, " ...promoting outbound AwaitingRemoteRevokeToRemove {} to AwaitingRemovedRemoteRevoke", log_bytes!(htlc.payment_hash.0));
- htlc.state = OutboundHTLCState::AwaitingRemovedRemoteRevoke(fail_reason);
+ // Grab the preimage, if it exists, instead of cloning
+ let mut reason = OutboundHTLCOutcome::Success(None);
+ mem::swap(outcome, &mut reason);
+ htlc.state = OutboundHTLCState::AwaitingRemovedRemoteRevoke(reason);
require_commitment = true;
}
}
self.channel_state = ChannelState::ShutdownComplete as u32;
return;
}
+
+ if self.announcement_sigs_state == AnnouncementSigsState::MessageSent || self.announcement_sigs_state == AnnouncementSigsState::Committed {
+ self.announcement_sigs_state = AnnouncementSigsState::NotSent;
+ }
+
// Upon reconnect we have to start the closing_signed dance over, but shutdown messages
// will be retransmitted.
self.last_sent_closing_fee = None;
/// Indicates that the latest ChannelMonitor update has been committed by the client
/// successfully and we should restore normal operation. Returns messages which should be sent
/// to the remote side.
- pub fn monitor_updating_restored<L: Deref>(&mut self, logger: &L) -> MonitorRestoreUpdates where L::Target: Logger {
+ pub fn monitor_updating_restored<L: Deref>(&mut self, logger: &L, node_pk: PublicKey, genesis_block_hash: BlockHash, best_block_height: u32) -> MonitorRestoreUpdates where L::Target: Logger {
assert_eq!(self.channel_state & ChannelState::MonitorUpdateFailed as u32, ChannelState::MonitorUpdateFailed as u32);
self.channel_state &= !(ChannelState::MonitorUpdateFailed as u32);
})
} else { None };
+ let announcement_sigs = self.get_announcement_sigs(node_pk, genesis_block_hash, best_block_height, logger);
+
let mut accepted_htlcs = Vec::new();
mem::swap(&mut accepted_htlcs, &mut self.monitor_pending_forwards);
let mut failed_htlcs = Vec::new();
self.monitor_pending_commitment_signed = false;
return MonitorRestoreUpdates {
raa: None, commitment_update: None, order: RAACommitmentOrder::RevokeAndACKFirst,
- accepted_htlcs, failed_htlcs, finalized_claimed_htlcs, funding_broadcastable, funding_locked
+ accepted_htlcs, failed_htlcs, finalized_claimed_htlcs, funding_broadcastable, funding_locked, announcement_sigs
};
}
if commitment_update.is_some() { "a" } else { "no" }, if raa.is_some() { "an" } else { "no" },
match order { RAACommitmentOrder::CommitmentFirst => "commitment", RAACommitmentOrder::RevokeAndACKFirst => "RAA"});
MonitorRestoreUpdates {
- raa, commitment_update, order, accepted_htlcs, failed_htlcs, finalized_claimed_htlcs, funding_broadcastable, funding_locked
+ raa, commitment_update, order, accepted_htlcs, failed_htlcs, finalized_claimed_htlcs, funding_broadcastable, funding_locked, announcement_sigs
}
}
/// May panic if some calls other than message-handling calls (which will all Err immediately)
/// have been called between remove_uncommitted_htlcs_and_mark_paused and this call.
- pub fn channel_reestablish<L: Deref>(&mut self, msg: &msgs::ChannelReestablish, logger: &L) -> Result<(Option<msgs::FundingLocked>, Option<msgs::RevokeAndACK>, Option<msgs::CommitmentUpdate>, Option<ChannelMonitorUpdate>, RAACommitmentOrder, Vec<(HTLCSource, PaymentHash)>, Option<msgs::Shutdown>), ChannelError> where L::Target: Logger {
+ pub fn channel_reestablish<L: Deref>(&mut self, msg: &msgs::ChannelReestablish, logger: &L,
+ node_pk: PublicKey, genesis_block_hash: BlockHash, best_block: &BestBlock)
+ -> Result<ReestablishResponses, ChannelError> where L::Target: Logger {
if self.channel_state & (ChannelState::PeerDisconnected as u32) == 0 {
// While BOLT 2 doesn't indicate explicitly we should error this channel here, it
// almost certainly indicates we are going to end up out-of-sync in some way, so we
})
} else { None };
+ let announcement_sigs = self.get_announcement_sigs(node_pk, genesis_block_hash, best_block.height(), logger);
+
if self.channel_state & (ChannelState::FundingSent as u32) == ChannelState::FundingSent as u32 {
// If we're waiting on a monitor update, we shouldn't re-send any funding_locked's.
if self.channel_state & (ChannelState::OurFundingLocked as u32) == 0 ||
return Err(ChannelError::Close("Peer claimed they saw a revoke_and_ack but we haven't sent funding_locked yet".to_owned()));
}
// Short circuit the whole handler as there is nothing we can resend them
- return Ok((None, None, None, None, RAACommitmentOrder::CommitmentFirst, Vec::new(), shutdown_msg));
+ return Ok(ReestablishResponses {
+ funding_locked: None,
+ raa: None, commitment_update: None, mon_update: None,
+ order: RAACommitmentOrder::CommitmentFirst,
+ holding_cell_failed_htlcs: Vec::new(),
+ shutdown_msg, announcement_sigs,
+ });
}
// We have OurFundingLocked set!
let next_per_commitment_point = self.holder_signer.get_per_commitment_point(self.cur_holder_commitment_transaction_number, &self.secp_ctx);
- return Ok((Some(msgs::FundingLocked {
- channel_id: self.channel_id(),
- next_per_commitment_point,
- }), None, None, None, RAACommitmentOrder::CommitmentFirst, Vec::new(), shutdown_msg));
+ return Ok(ReestablishResponses {
+ funding_locked: Some(msgs::FundingLocked {
+ channel_id: self.channel_id(),
+ next_per_commitment_point,
+ }),
+ raa: None, commitment_update: None, mon_update: None,
+ order: RAACommitmentOrder::CommitmentFirst,
+ holding_cell_failed_htlcs: Vec::new(),
+ shutdown_msg, announcement_sigs,
+ });
}
let required_revoke = if msg.next_remote_commitment_number + 1 == INITIAL_COMMITMENT_NUMBER - self.cur_holder_commitment_transaction_number {
// the corresponding revoke_and_ack back yet.
let next_counterparty_commitment_number = INITIAL_COMMITMENT_NUMBER - self.cur_counterparty_commitment_transaction_number + if (self.channel_state & ChannelState::AwaitingRemoteRevoke as u32) != 0 { 1 } else { 0 };
- let resend_funding_locked = if msg.next_local_commitment_number == 1 && INITIAL_COMMITMENT_NUMBER - self.cur_holder_commitment_transaction_number == 1 {
+ let funding_locked = if msg.next_local_commitment_number == 1 && INITIAL_COMMITMENT_NUMBER - self.cur_holder_commitment_transaction_number == 1 {
// We should never have to worry about MonitorUpdateFailed resending FundingLocked
let next_per_commitment_point = self.holder_signer.get_per_commitment_point(self.cur_holder_commitment_transaction_number, &self.secp_ctx);
Some(msgs::FundingLocked {
// have received some updates while we were disconnected. Free the holding cell
// now!
match self.free_holding_cell_htlcs(logger) {
- Err(ChannelError::Close(msg)) => return Err(ChannelError::Close(msg)),
+ Err(ChannelError::Close(msg)) => Err(ChannelError::Close(msg)),
Err(ChannelError::Warn(_)) | Err(ChannelError::Ignore(_)) | Err(ChannelError::CloseDelayBroadcast(_)) =>
panic!("Got non-channel-failing result from free_holding_cell_htlcs"),
- Ok((Some((commitment_update, monitor_update)), htlcs_to_fail)) => {
- return Ok((resend_funding_locked, required_revoke, Some(commitment_update), Some(monitor_update), self.resend_order.clone(), htlcs_to_fail, shutdown_msg));
+ Ok((Some((commitment_update, monitor_update)), holding_cell_failed_htlcs)) => {
+ Ok(ReestablishResponses {
+ funding_locked, shutdown_msg, announcement_sigs,
+ raa: required_revoke,
+ commitment_update: Some(commitment_update),
+ order: self.resend_order.clone(),
+ mon_update: Some(monitor_update),
+ holding_cell_failed_htlcs,
+ })
},
- Ok((None, htlcs_to_fail)) => {
- return Ok((resend_funding_locked, required_revoke, None, None, self.resend_order.clone(), htlcs_to_fail, shutdown_msg));
+ Ok((None, holding_cell_failed_htlcs)) => {
+ Ok(ReestablishResponses {
+ funding_locked, shutdown_msg, announcement_sigs,
+ raa: required_revoke,
+ commitment_update: None,
+ order: self.resend_order.clone(),
+ mon_update: None,
+ holding_cell_failed_htlcs,
+ })
},
}
} else {
- return Ok((resend_funding_locked, required_revoke, None, None, self.resend_order.clone(), Vec::new(), shutdown_msg));
+ Ok(ReestablishResponses {
+ funding_locked, shutdown_msg, announcement_sigs,
+ raa: required_revoke,
+ commitment_update: None,
+ order: self.resend_order.clone(),
+ mon_update: None,
+ holding_cell_failed_htlcs: Vec::new(),
+ })
}
} else if msg.next_local_commitment_number == next_counterparty_commitment_number - 1 {
if required_revoke.is_some() {
if self.channel_state & (ChannelState::MonitorUpdateFailed as u32) != 0 {
self.monitor_pending_commitment_signed = true;
- return Ok((resend_funding_locked, None, None, None, self.resend_order.clone(), Vec::new(), shutdown_msg));
+ Ok(ReestablishResponses {
+ funding_locked, shutdown_msg, announcement_sigs,
+ commitment_update: None, raa: None, mon_update: None,
+ order: self.resend_order.clone(),
+ holding_cell_failed_htlcs: Vec::new(),
+ })
+ } else {
+ Ok(ReestablishResponses {
+ funding_locked, shutdown_msg, announcement_sigs,
+ raa: required_revoke,
+ commitment_update: Some(self.get_last_commitment_update(logger)),
+ order: self.resend_order.clone(),
+ mon_update: None,
+ holding_cell_failed_htlcs: Vec::new(),
+ })
}
-
- return Ok((resend_funding_locked, required_revoke, Some(self.get_last_commitment_update(logger)), None, self.resend_order.clone(), Vec::new(), shutdown_msg));
} else {
- return Err(ChannelError::Close("Peer attempted to reestablish channel with a very old remote commitment transaction".to_owned()));
+ Err(ChannelError::Close("Peer attempted to reestablish channel with a very old remote commitment transaction".to_owned()))
}
}
/// Allowed in any state (including after shutdown)
pub fn is_usable(&self) -> bool {
let mask = ChannelState::ChannelFunded as u32 | BOTH_SIDES_SHUTDOWN_MASK;
- (self.channel_state & mask) == (ChannelState::ChannelFunded as u32)
+ (self.channel_state & mask) == (ChannelState::ChannelFunded as u32) && !self.monitor_pending_funding_locked
}
/// Returns true if this channel is currently available for use. This is a superset of
if need_commitment_update {
if self.channel_state & (ChannelState::MonitorUpdateFailed as u32) == 0 {
- let next_per_commitment_point = self.holder_signer.get_per_commitment_point(self.cur_holder_commitment_transaction_number, &self.secp_ctx);
- return Some(msgs::FundingLocked {
- channel_id: self.channel_id,
- next_per_commitment_point,
- });
+ if self.channel_state & (ChannelState::PeerDisconnected as u32) == 0 {
+ let next_per_commitment_point = self.holder_signer.get_per_commitment_point(self.cur_holder_commitment_transaction_number, &self.secp_ctx);
+ return Some(msgs::FundingLocked {
+ channel_id: self.channel_id,
+ next_per_commitment_point,
+ });
+ }
} else {
self.monitor_pending_funding_locked = true;
}
/// When a transaction is confirmed, we check whether it is or spends the funding transaction
/// In the first case, we store the confirmation height and calculating the short channel id.
/// In the second, we simply return an Err indicating we need to be force-closed now.
- pub fn transactions_confirmed<L: Deref>(&mut self, block_hash: &BlockHash, height: u32, txdata: &TransactionData, logger: &L)
- -> Result<Option<msgs::FundingLocked>, ClosureReason> where L::Target: Logger {
+ pub fn transactions_confirmed<L: Deref>(&mut self, block_hash: &BlockHash, height: u32,
+ txdata: &TransactionData, genesis_block_hash: BlockHash, node_pk: PublicKey, logger: &L)
+ -> Result<(Option<msgs::FundingLocked>, Option<msgs::AnnouncementSignatures>), ClosureReason> where L::Target: Logger {
let non_shutdown_state = self.channel_state & (!MULTI_STATE_FLAGS);
- for &(index_in_block, tx) in txdata.iter() {
- if let Some(funding_txo) = self.get_funding_txo() {
+ if let Some(funding_txo) = self.get_funding_txo() {
+ for &(index_in_block, tx) in txdata.iter() {
// If we haven't yet sent a funding_locked, but are in FundingSent (ignoring
// whether they've sent a funding_locked or not), check if we should send one.
if non_shutdown_state & !(ChannelState::TheirFundingLocked as u32) == ChannelState::FundingSent as u32 {
// may have already happened for this block).
if let Some(funding_locked) = self.check_get_funding_locked(height) {
log_info!(logger, "Sending a funding_locked to our peer for channel {}", log_bytes!(self.channel_id));
- return Ok(Some(funding_locked));
+ let announcement_sigs = self.get_announcement_sigs(node_pk, genesis_block_hash, height, logger);
+ return Ok((Some(funding_locked), announcement_sigs));
}
}
for inp in tx.input.iter() {
}
}
}
- Ok(None)
+ Ok((None, None))
}
/// When a new block is connected, we check the height of the block against outbound holding
///
/// May return some HTLCs (and their payment_hash) which have timed out and should be failed
/// back.
- pub fn best_block_updated<L: Deref>(&mut self, height: u32, highest_header_time: u32, logger: &L)
- -> Result<(Option<msgs::FundingLocked>, Vec<(HTLCSource, PaymentHash)>), ClosureReason> where L::Target: Logger {
+ pub fn best_block_updated<L: Deref>(&mut self, height: u32, highest_header_time: u32, genesis_block_hash: BlockHash, node_pk: PublicKey, logger: &L)
+ -> Result<(Option<msgs::FundingLocked>, Vec<(HTLCSource, PaymentHash)>, Option<msgs::AnnouncementSignatures>), ClosureReason> where L::Target: Logger {
+ self.do_best_block_updated(height, highest_header_time, Some((genesis_block_hash, node_pk)), logger)
+ }
+
+ fn do_best_block_updated<L: Deref>(&mut self, height: u32, highest_header_time: u32, genesis_node_pk: Option<(BlockHash, PublicKey)>, logger: &L)
+ -> Result<(Option<msgs::FundingLocked>, Vec<(HTLCSource, PaymentHash)>, Option<msgs::AnnouncementSignatures>), ClosureReason> where L::Target: Logger {
let mut timed_out_htlcs = Vec::new();
// This mirrors the check in ChannelManager::decode_update_add_htlc_onion, refusing to
// forward an HTLC when our counterparty should almost certainly just fail it for expiring
self.update_time_counter = cmp::max(self.update_time_counter, highest_header_time);
if let Some(funding_locked) = self.check_get_funding_locked(height) {
+ let announcement_sigs = if let Some((genesis_block_hash, node_pk)) = genesis_node_pk {
+ self.get_announcement_sigs(node_pk, genesis_block_hash, height, logger)
+ } else { None };
log_info!(logger, "Sending a funding_locked to our peer for channel {}", log_bytes!(self.channel_id));
- return Ok((Some(funding_locked), timed_out_htlcs));
+ return Ok((Some(funding_locked), timed_out_htlcs, announcement_sigs));
}
let non_shutdown_state = self.channel_state & (!MULTI_STATE_FLAGS);
return Err(ClosureReason::FundingTimedOut);
}
- Ok((None, timed_out_htlcs))
+ let announcement_sigs = if let Some((genesis_block_hash, node_pk)) = genesis_node_pk {
+ self.get_announcement_sigs(node_pk, genesis_block_hash, height, logger)
+ } else { None };
+ Ok((None, timed_out_htlcs, announcement_sigs))
}
/// Indicates the funding transaction is no longer confirmed in the main chain. This may
// larger. If we don't know that time has moved forward, we can just set it to the last
// time we saw and it will be ignored.
let best_time = self.update_time_counter;
- match self.best_block_updated(reorg_height, best_time, logger) {
- Ok((funding_locked, timed_out_htlcs)) => {
+ match self.do_best_block_updated(reorg_height, best_time, None, logger) {
+ Ok((funding_locked, timed_out_htlcs, announcement_sigs)) => {
assert!(funding_locked.is_none(), "We can't generate a funding with 0 confirmations?");
assert!(timed_out_htlcs.is_empty(), "We can't have accepted HTLCs with a timeout before our funding confirmation?");
+ assert!(announcement_sigs.is_none(), "We can't generate an announcement_sigs with 0 confirmations?");
Ok(())
},
Err(e) => Err(e)
fn get_outbound_funding_created_signature<L: Deref>(&mut self, logger: &L) -> Result<Signature, ChannelError> where L::Target: Logger {
let counterparty_keys = self.build_remote_transaction_keys()?;
let counterparty_initial_commitment_tx = self.build_commitment_transaction(self.cur_counterparty_commitment_transaction_number, &counterparty_keys, false, false, logger).tx;
- Ok(self.holder_signer.sign_counterparty_commitment(&counterparty_initial_commitment_tx, &self.secp_ctx)
+ Ok(self.holder_signer.sign_counterparty_commitment(&counterparty_initial_commitment_tx, Vec::new(), &self.secp_ctx)
.map_err(|_| ChannelError::Close("Failed to get signatures for new commitment_signed".to_owned()))?.0)
}
})
}
- /// Gets an UnsignedChannelAnnouncement, as well as a signature covering it using our
- /// bitcoin_key, if available, for this channel. The channel must be publicly announceable and
- /// available for use (have exchanged FundingLocked messages in both directions). Should be used
- /// for both loose and in response to an AnnouncementSignatures message from the remote peer.
+ /// Gets an UnsignedChannelAnnouncement for this channel. The channel must be publicly
+ /// announceable and available for use (have exchanged FundingLocked messages in both
+ /// directions). Should be used for both broadcasted announcements and in response to an
+ /// AnnouncementSignatures message from the remote peer.
+ ///
/// Will only fail if we're not in a state where channel_announcement may be sent (including
/// closing).
+ ///
/// Note that the "channel must be funded" requirement is stricter than BOLT 7 requires - see
/// https://github.com/lightningnetwork/lightning-rfc/issues/468
///
/// This will only return ChannelError::Ignore upon failure.
- pub fn get_channel_announcement(&self, node_id: PublicKey, chain_hash: BlockHash) -> Result<(msgs::UnsignedChannelAnnouncement, Signature), ChannelError> {
+ fn get_channel_announcement(&self, node_id: PublicKey, chain_hash: BlockHash) -> Result<msgs::UnsignedChannelAnnouncement, ChannelError> {
if !self.config.announced_channel {
return Err(ChannelError::Ignore("Channel is not available for public announcements".to_owned()));
}
- if self.channel_state & (ChannelState::ChannelFunded as u32) == 0 {
- return Err(ChannelError::Ignore("Cannot get a ChannelAnnouncement until the channel funding has been locked".to_owned()));
- }
- if (self.channel_state & (ChannelState::LocalShutdownSent as u32 | ChannelState::ShutdownComplete as u32)) != 0 {
- return Err(ChannelError::Ignore("Cannot get a ChannelAnnouncement once the channel is closing".to_owned()));
+ if !self.is_usable() {
+ return Err(ChannelError::Ignore("Cannot get a ChannelAnnouncement if the channel is not currently usable".to_owned()));
}
let were_node_one = node_id.serialize()[..] < self.counterparty_node_id.serialize()[..];
excess_data: Vec::new(),
};
- let sig = self.holder_signer.sign_channel_announcement(&msg, &self.secp_ctx)
- .map_err(|_| ChannelError::Ignore("Signer rejected channel_announcement".to_owned()))?;
+ Ok(msg)
+ }
+
+ fn get_announcement_sigs<L: Deref>(&mut self, node_pk: PublicKey, genesis_block_hash: BlockHash, best_block_height: u32, logger: &L)
+ -> Option<msgs::AnnouncementSignatures> where L::Target: Logger {
+ if self.funding_tx_confirmation_height == 0 || self.funding_tx_confirmation_height + 5 > best_block_height {
+ return None;
+ }
+
+ if !self.is_usable() {
+ return None;
+ }
+
+ if self.channel_state & ChannelState::PeerDisconnected as u32 != 0 {
+ log_trace!(logger, "Cannot create an announcement_signatures as our peer is disconnected");
+ return None;
+ }
+
+ if self.announcement_sigs_state != AnnouncementSigsState::NotSent {
+ return None;
+ }
+
+ log_trace!(logger, "Creating an announcement_signatures message for channel {}", log_bytes!(self.channel_id()));
+ let announcement = match self.get_channel_announcement(node_pk, genesis_block_hash) {
+ Ok(a) => a,
+ Err(_) => {
+ log_trace!(logger, "Cannot create an announcement_signatures as channel is not public.");
+ return None;
+ }
+ };
+ let (our_node_sig, our_bitcoin_sig) = match self.holder_signer.sign_channel_announcement(&announcement, &self.secp_ctx) {
+ Err(_) => {
+ log_error!(logger, "Signer rejected channel_announcement signing. Channel will not be announced!");
+ return None;
+ },
+ Ok(v) => v
+ };
+ self.announcement_sigs_state = AnnouncementSigsState::MessageSent;
- Ok((msg, sig))
+ Some(msgs::AnnouncementSignatures {
+ channel_id: self.channel_id(),
+ short_channel_id: self.get_short_channel_id().unwrap(),
+ node_signature: our_node_sig,
+ bitcoin_signature: our_bitcoin_sig,
+ })
}
/// Signs the given channel announcement, returning a ChannelError::Ignore if no keys are
/// available.
- fn sign_channel_announcement(&self, our_node_secret: &SecretKey, our_node_id: PublicKey, msghash: secp256k1::Message, announcement: msgs::UnsignedChannelAnnouncement, our_bitcoin_sig: Signature) -> Result<msgs::ChannelAnnouncement, ChannelError> {
+ fn sign_channel_announcement(&self, our_node_id: PublicKey, announcement: msgs::UnsignedChannelAnnouncement) -> Result<msgs::ChannelAnnouncement, ChannelError> {
if let Some((their_node_sig, their_bitcoin_sig)) = self.announcement_sigs {
let were_node_one = announcement.node_id_1 == our_node_id;
- let our_node_sig = self.secp_ctx.sign(&msghash, our_node_secret);
+ let (our_node_sig, our_bitcoin_sig) = self.holder_signer.sign_channel_announcement(&announcement, &self.secp_ctx)
+ .map_err(|_| ChannelError::Ignore("Signer rejected channel_announcement".to_owned()))?;
Ok(msgs::ChannelAnnouncement {
node_signature_1: if were_node_one { our_node_sig } else { their_node_sig },
node_signature_2: if were_node_one { their_node_sig } else { our_node_sig },
/// Processes an incoming announcement_signatures message, providing a fully-signed
/// channel_announcement message which we can broadcast and storing our counterparty's
/// signatures for later reconstruction/rebroadcast of the channel_announcement.
- pub fn announcement_signatures(&mut self, our_node_secret: &SecretKey, our_node_id: PublicKey, chain_hash: BlockHash, msg: &msgs::AnnouncementSignatures) -> Result<msgs::ChannelAnnouncement, ChannelError> {
- let (announcement, our_bitcoin_sig) = self.get_channel_announcement(our_node_id.clone(), chain_hash)?;
+ pub fn announcement_signatures(&mut self, our_node_id: PublicKey, chain_hash: BlockHash, best_block_height: u32, msg: &msgs::AnnouncementSignatures) -> Result<msgs::ChannelAnnouncement, ChannelError> {
+ let announcement = self.get_channel_announcement(our_node_id.clone(), chain_hash)?;
let msghash = hash_to_message!(&Sha256d::hash(&announcement.encode()[..])[..]);
}
self.announcement_sigs = Some((msg.node_signature, msg.bitcoin_signature));
+ if self.funding_tx_confirmation_height == 0 || self.funding_tx_confirmation_height + 5 > best_block_height {
+ return Err(ChannelError::Ignore(
+ "Got announcement_signatures prior to the required six confirmations - we may not have received a block yet that our peer has".to_owned()));
+ }
- self.sign_channel_announcement(our_node_secret, our_node_id, msghash, announcement, our_bitcoin_sig)
+ self.sign_channel_announcement(our_node_id, announcement)
}
/// Gets a signed channel_announcement for this channel, if we previously received an
/// announcement_signatures from our counterparty.
- pub fn get_signed_channel_announcement(&self, our_node_secret: &SecretKey, our_node_id: PublicKey, chain_hash: BlockHash) -> Option<msgs::ChannelAnnouncement> {
- let (announcement, our_bitcoin_sig) = match self.get_channel_announcement(our_node_id.clone(), chain_hash) {
+ pub fn get_signed_channel_announcement(&self, our_node_id: PublicKey, chain_hash: BlockHash, best_block_height: u32) -> Option<msgs::ChannelAnnouncement> {
+ if self.funding_tx_confirmation_height == 0 || self.funding_tx_confirmation_height + 5 > best_block_height {
+ return None;
+ }
+ let announcement = match self.get_channel_announcement(our_node_id.clone(), chain_hash) {
Ok(res) => res,
Err(_) => return None,
};
- let msghash = hash_to_message!(&Sha256d::hash(&announcement.encode()[..])[..]);
- match self.sign_channel_announcement(our_node_secret, our_node_id, msghash, announcement, our_bitcoin_sig) {
+ match self.sign_channel_announcement(our_node_id, announcement) {
Ok(res) => Some(res),
Err(_) => None,
}
}
}
for htlc in self.pending_outbound_htlcs.iter_mut() {
- if let Some(fail_reason) = if let &mut OutboundHTLCState::AwaitingRemoteRevokeToRemove(ref mut fail_reason) = &mut htlc.state {
- Some(fail_reason.take())
- } else { None } {
+ if let &mut OutboundHTLCState::AwaitingRemoteRevokeToRemove(ref mut outcome) = &mut htlc.state {
log_trace!(logger, " ...promoting outbound AwaitingRemoteRevokeToRemove {} to AwaitingRemovedRemoteRevoke", log_bytes!(htlc.payment_hash.0));
- htlc.state = OutboundHTLCState::AwaitingRemovedRemoteRevoke(fail_reason);
+ // Grab the preimage, if it exists, instead of cloning
+ let mut reason = OutboundHTLCOutcome::Success(None);
+ mem::swap(outcome, &mut reason);
+ htlc.state = OutboundHTLCState::AwaitingRemovedRemoteRevoke(reason);
}
}
if let Some((feerate, update_state)) = self.pending_update_fee {
Err(e) => return Err(e),
};
+ if self.announcement_sigs_state == AnnouncementSigsState::MessageSent {
+ self.announcement_sigs_state = AnnouncementSigsState::Committed;
+ }
+
self.latest_monitor_update_id += 1;
let monitor_update = ChannelMonitorUpdate {
update_id: self.latest_monitor_update_id,
htlcs.push(htlc);
}
- let res = self.holder_signer.sign_counterparty_commitment(&commitment_stats.tx, &self.secp_ctx)
+ let res = self.holder_signer.sign_counterparty_commitment(&commitment_stats.tx, commitment_stats.preimages, &self.secp_ctx)
.map_err(|_| ChannelError::Close("Failed to get signatures for new commitment_signed".to_owned()))?;
signature = res.0;
htlc_signatures = res.1;
}
}
+impl Writeable for AnnouncementSigsState {
+ fn write<W: Writer>(&self, writer: &mut W) -> Result<(), io::Error> {
+ // We only care about writing out the current state as if we had just disconnected, at
+ // which point we always set anything but AnnouncementSigsReceived to NotSent.
+ match self {
+ AnnouncementSigsState::NotSent => 0u8.write(writer),
+ AnnouncementSigsState::MessageSent => 0u8.write(writer),
+ AnnouncementSigsState::Committed => 0u8.write(writer),
+ AnnouncementSigsState::PeerReceived => 1u8.write(writer),
+ }
+ }
+}
+
+impl Readable for AnnouncementSigsState {
+ fn read<R: io::Read>(reader: &mut R) -> Result<Self, DecodeError> {
+ Ok(match <u8 as Readable>::read(reader)? {
+ 0 => AnnouncementSigsState::NotSent,
+ 1 => AnnouncementSigsState::PeerReceived,
+ _ => return Err(DecodeError::InvalidValue),
+ })
+ }
+}
+
impl<Signer: Sign> Writeable for Channel<Signer> {
fn write<W: Writer>(&self, writer: &mut W) -> Result<(), io::Error> {
// Note that we write out as if remove_uncommitted_htlcs_and_mark_paused had just been
}
}
+ let mut preimages: Vec<&Option<PaymentPreimage>> = vec![];
+
(self.pending_outbound_htlcs.len() as u64).write(writer)?;
for htlc in self.pending_outbound_htlcs.iter() {
htlc.htlc_id.write(writer)?;
// resend the claim/fail on reconnect as we all (hopefully) the missing CS.
1u8.write(writer)?;
},
- &OutboundHTLCState::AwaitingRemoteRevokeToRemove(ref fail_reason) => {
+ &OutboundHTLCState::AwaitingRemoteRevokeToRemove(ref outcome) => {
3u8.write(writer)?;
- fail_reason.write(writer)?;
- },
- &OutboundHTLCState::AwaitingRemovedRemoteRevoke(ref fail_reason) => {
+ if let OutboundHTLCOutcome::Success(preimage) = outcome {
+ preimages.push(preimage);
+ }
+ let reason: Option<&HTLCFailReason> = outcome.into();
+ reason.write(writer)?;
+ }
+ &OutboundHTLCState::AwaitingRemovedRemoteRevoke(ref outcome) => {
4u8.write(writer)?;
- fail_reason.write(writer)?;
- },
+ if let OutboundHTLCOutcome::Success(preimage) = outcome {
+ preimages.push(preimage);
+ }
+ let reason: Option<&HTLCFailReason> = outcome.into();
+ reason.write(writer)?;
+ }
}
}
(9, self.target_closing_feerate_sats_per_kw, option),
(11, self.monitor_pending_finalized_fulfills, vec_type),
(13, self.channel_creation_height, required),
+ (15, preimages, vec_type),
+ (17, self.announcement_sigs_state, required),
});
Ok(())
state: match <u8 as Readable>::read(reader)? {
0 => OutboundHTLCState::LocalAnnounced(Box::new(Readable::read(reader)?)),
1 => OutboundHTLCState::Committed,
- 2 => OutboundHTLCState::RemoteRemoved(Readable::read(reader)?),
- 3 => OutboundHTLCState::AwaitingRemoteRevokeToRemove(Readable::read(reader)?),
- 4 => OutboundHTLCState::AwaitingRemovedRemoteRevoke(Readable::read(reader)?),
+ 2 => {
+ let option: Option<HTLCFailReason> = Readable::read(reader)?;
+ OutboundHTLCState::RemoteRemoved(option.into())
+ },
+ 3 => {
+ let option: Option<HTLCFailReason> = Readable::read(reader)?;
+ OutboundHTLCState::AwaitingRemoteRevokeToRemove(option.into())
+ },
+ 4 => {
+ let option: Option<HTLCFailReason> = Readable::read(reader)?;
+ OutboundHTLCState::AwaitingRemovedRemoteRevoke(option.into())
+ },
_ => return Err(DecodeError::InvalidValue),
},
});
// only, so we default to that if none was written.
let mut channel_type = Some(ChannelTypeFeatures::only_static_remote_key());
let mut channel_creation_height = Some(serialized_height);
+ let mut preimages_opt: Option<Vec<Option<PaymentPreimage>>> = None;
+
+ // If we read an old Channel, for simplicity we just treat it as "we never sent an
+ // AnnouncementSignatures" which implies we'll re-send it on reconnect, but that's fine.
+ let mut announcement_sigs_state = Some(AnnouncementSigsState::NotSent);
+
read_tlv_fields!(reader, {
(0, announcement_sigs, option),
(1, minimum_depth, option),
(9, target_closing_feerate_sats_per_kw, option),
(11, monitor_pending_finalized_fulfills, vec_type),
(13, channel_creation_height, option),
+ (15, preimages_opt, vec_type),
+ (17, announcement_sigs_state, option),
});
+ if let Some(preimages) = preimages_opt {
+ let mut iter = preimages.into_iter();
+ for htlc in pending_outbound_htlcs.iter_mut() {
+ match &htlc.state {
+ OutboundHTLCState::AwaitingRemoteRevokeToRemove(OutboundHTLCOutcome::Success(None)) => {
+ htlc.state = OutboundHTLCState::AwaitingRemoteRevokeToRemove(OutboundHTLCOutcome::Success(iter.next().ok_or(DecodeError::InvalidValue)?));
+ }
+ OutboundHTLCState::AwaitingRemovedRemoteRevoke(OutboundHTLCOutcome::Success(None)) => {
+ htlc.state = OutboundHTLCState::AwaitingRemovedRemoteRevoke(OutboundHTLCOutcome::Success(iter.next().ok_or(DecodeError::InvalidValue)?));
+ }
+ _ => {}
+ }
+ }
+ // We expect all preimages to be consumed above
+ if iter.next().is_some() {
+ return Err(DecodeError::InvalidValue);
+ }
+ }
+
let chan_features = channel_type.as_ref().unwrap();
if chan_features.supports_unknown_bits() || chan_features.requires_unknown_bits() {
// If the channel was written by a new version and negotiated with features we don't
config: config.unwrap(),
channel_id,
channel_state,
+ announcement_sigs_state: announcement_sigs_state.unwrap(),
secp_ctx,
channel_value_satoshis,
"MAX_FUNDING_SATOSHIS is greater than all satoshis in existence");
}
+ #[test]
+ fn test_no_fee_check_overflow() {
+ // Previously, calling `check_remote_fee` with a fee of 0xffffffff would overflow in
+ // arithmetic, causing a panic with debug assertions enabled.
+ assert!(Channel::<InMemorySigner>::check_remote_fee(&&TestFeeEstimator { fee_est: 42 }, u32::max_value()).is_err());
+ }
+
struct Keys {
signer: InMemorySigner,
}
let mut signer = InMemorySigner::new(
&secp_ctx,
+ SecretKey::from_slice(&hex::decode("4242424242424242424242424242424242424242424242424242424242424242").unwrap()[..]).unwrap(),
SecretKey::from_slice(&hex::decode("30ff4956bbdd3222d44cc5e8a1261dab1e07957bdac5ae88fe3261ef321f3749").unwrap()[..]).unwrap(),
SecretKey::from_slice(&hex::decode("0fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff").unwrap()[..]).unwrap(),
SecretKey::from_slice(&hex::decode("1111111111111111111111111111111111111111111111111111111111111111").unwrap()[..]).unwrap(),
projects / rust-lightning / commitdiff