From d885407e3e91fb64b5402aab46299dfc322726a6 Mon Sep 17 00:00:00 2001
From: niftynei <niftynei@gmail.com>
Date: Tue, 19 Jul 2022 17:04:38 +0930
Subject: [PATCH] bkpr, elements: elements tx have one extra output for fees

if it's an elements chain, subtract one from the output count

we wait to calculate fees for a channel close until all the outputs are
accounted for, but elements chains create a separate output for the
amount of fees that are paid on a tx.

fixes crash in `test_penalty_rbf_burn`
---
 onchaind/onchaind.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/onchaind/onchaind.c b/onchaind/onchaind.c
index f144f04ce..4cd20023f 100644
--- a/onchaind/onchaind.c
+++ b/onchaind/onchaind.c
@@ -3915,6 +3915,9 @@ int main(int argc, char *argv[])
 						  &funding, tx_blockheight,
 						  our_msat,
 						  funding_sats,
+						  is_elements(chainparams) ?
+						  /* Minus 1, fee output */
+						  tal_count(tx->outputs) - 1 :
 						  tal_count(tx->outputs))));
 
 	status_debug("Remote per-commit point: %s",