bitcoin_script: remember to push extra 0 for OP_CHECKMULTISIG.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
10 years ago · cbad9a1fa5
1 changed files with 2 additions and 0 deletions
--- a/bitcoin_script.c
+++ b/bitcoin_script.c
@ -279,6 +279,8 @@ u8 *scriptsig_p2sh_2of2(const tal_t *ctx,
 	u8 *script = tal_arr(ctx, u8, 0);
 	u8 *redeemscript;

+	/* OP_CHECKMULTISIG has an out-by-one bug, which MBZ */
+	add_number(&script, 0);
 	add_push_sig(&script, sig1);
 	add_push_sig(&script, sig2);