X-Git-Url: http://git.bitcoin.ninja/index.cgi?a=blobdiff_plain;f=lightning%2Fsrc%2Fln%2Fchannel.rs;h=9af0f6379e5a1672e851a61ef0c54d717235a1a5;hb=8419d13d4c45697062715c13b5d0657a38fbfb99;hp=842c91180868c3d21a95feff20b303aba7c5288d;hpb=852cf2b3f2e5145f8a28d5e30eb37c9d5568dcc1;p=rust-lightning

diff --git a/lightning/src/ln/channel.rs b/lightning/src/ln/channel.rs
index 842c9118..9af0f637 100644
--- a/lightning/src/ln/channel.rs
+++ b/lightning/src/ln/channel.rs
@@ -2484,6 +2484,11 @@ impl<Signer: WriteableEcdsaChannelSigner> Channel<Signer> {
 					// If they haven't ever sent an updated point, the point they send should match
 					// the current one.
 					self.counterparty_cur_commitment_point
+				} else if self.cur_counterparty_commitment_transaction_number == INITIAL_COMMITMENT_NUMBER - 2 {
+					// If we've advanced the commitment number once, the second commitment point is
+					// at `counterparty_prev_commitment_point`, which is not yet revoked.
+					debug_assert!(self.counterparty_prev_commitment_point.is_some());
+					self.counterparty_prev_commitment_point
 				} else {
 					// If they have sent updated points, channel_ready is always supposed to match
 					// their "first" point, which we re-derive here.