Log when we change HTLC state while sending a commitment transaction

diff --git a/lightning/src/ln/channel.rs b/lightning/src/ln/channel.rs
index 9a5fd0422228e1e46f4bdd3d27c6cb1c246575a8..a1123a320f87d9ead4c4789643a11cfe0453373c 100644 (file)
--- a/lightning/src/ln/channel.rs
+++ b/lightning/src/ln/channel.rs
@@ -4462,6 +4462,7 @@ impl<Signer: Sign> Channel<Signer> {
        }
        /// Only fails in case of bad keys
        fn send_commitment_no_status_check<L: Deref>(&mut self, logger: &L) -> Result<(msgs::CommitmentSigned, ChannelMonitorUpdate), ChannelError> where L::Target: Logger {
+               log_trace!(logger, "Updating HTLC state for a newly-sent commitment_signed...");
                // We can upgrade the status of some HTLCs that are waiting on a commitment, even if we
                // fail to generate this, we still are at least at a position where upgrading their status
                // is acceptable.
@@ -4470,6 +4471,7 @@ impl<Signer: Sign> Channel<Signer> {
                                Some(InboundHTLCState::AwaitingAnnouncedRemoteRevoke(forward_info.clone()))
                        } else { None };
                        if let Some(state) = new_state {
+                               log_trace!(logger, " ...promoting inbound AwaitingRemoteRevokeToAnnounce {} to AwaitingAnnouncedRemoteRevoke", log_bytes!(htlc.payment_hash.0));
                                htlc.state = state;
                        }
                }
@@ -4477,12 +4479,14 @@ impl<Signer: Sign> Channel<Signer> {
                        if let Some(fail_reason) = if let &mut OutboundHTLCState::AwaitingRemoteRevokeToRemove(ref mut fail_reason) = &mut htlc.state {
                                Some(fail_reason.take())
                        } else { None } {
+                               log_trace!(logger, " ...promoting outbound AwaitingRemoteRevokeToRemove {} to AwaitingRemovedRemoteRevoke", log_bytes!(htlc.payment_hash.0));
                                htlc.state = OutboundHTLCState::AwaitingRemovedRemoteRevoke(fail_reason);
                        }
                }
                if let Some((feerate, update_state)) = self.pending_update_fee {
                        if update_state == FeeUpdateState::AwaitingRemoteRevokeToAnnounce {
                                debug_assert!(!self.is_outbound());
+                               log_trace!(logger, " ...promoting inbound AwaitingRemoteRevokeToAnnounce fee update {} to Committed", feerate);
                                self.feerate_per_kw = feerate;
                                self.pending_update_fee = None;
                        }