Log full signed remote commitment transaction hex in channel

This is useful when rebuilding the full_stack_target test vector

Author: TheBlueMatt

lightning/src/ln/channel.rs

@@ -3898,7 +3898,8 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
 			signature = res.0;
 			htlc_signatures = res.1;
 
-			log_trace!(logger, "Signed remote commitment tx {} with redeemscript {} -> {}",
+			log_trace!(logger, "Signed remote commitment tx {} (txid {}) with redeemscript {} -> {}",
+				encode::serialize_hex(&counterparty_commitment_tx.0.trust().built_transaction().transaction),
 				&counterparty_commitment_txid,
 				encode::serialize_hex(&self.get_funding_redeemscript()),
 				log_bytes!(signature.serialize_compact()[..]));