From: Antoine Riard <ariard@student.42.fr>
Date: Mon, 3 Dec 2018 02:27:26 +0000 (-0500)
Subject: Add logging of HTLC outputs resolved by remote peer justice tx
X-Git-Tag: v0.0.12~256^2~4
X-Git-Url: http://git.bitcoin.ninja/?a=commitdiff_plain;h=ea6e9a78802c672f67fd26de43a5cc6b95fcf693;p=rust-lightning

Add logging of HTLC outputs resolved by remote peer justice tx

In case of broadcast of revoked local commitment tx, we may be
interested that we've screwed up
---

diff --git a/src/ln/channelmonitor.rs b/src/ln/channelmonitor.rs
index b1e7df29c..0ba2f0ba4 100644
--- a/src/ln/channelmonitor.rs
+++ b/src/ln/channelmonitor.rs
@@ -1813,7 +1813,10 @@ impl ChannelMonitor {
 			// to broadcast solving backward
 			if let Some((source, payment_hash)) = payment_data {
 				let mut payment_preimage = PaymentPreimage([0; 32]);
-				if input.witness.len() == 5 && input.witness[4].len() == ACCEPTED_HTLC_SCRIPT_WEIGHT {
+				if (input.witness.len() == 3 && input.witness[2].len() == OFFERED_HTLC_SCRIPT_WEIGHT && input.witness[1].len() == 33)
+					|| (input.witness.len() == 3 && input.witness[2].len() == ACCEPTED_HTLC_SCRIPT_WEIGHT && input.witness[1].len() == 33) {
+					log_error!(self, "Remote used revocation sig to take a {} HTLC output at index {} from commitment_tx {}", if input.witness[2].len() == OFFERED_HTLC_SCRIPT_WEIGHT { "offered" } else { "accepted" }, input.previous_output.vout, input.previous_output.txid);
+				} else if input.witness.len() == 5 && input.witness[4].len() == ACCEPTED_HTLC_SCRIPT_WEIGHT {
 					payment_preimage.0.copy_from_slice(&tx.input[0].witness[3]);
 					htlc_updated.push((source, Some(payment_preimage), payment_hash));
 				} else if input.witness.len() == 3 && input.witness[2].len() == OFFERED_HTLC_SCRIPT_WEIGHT {