From e3c4dede4195a0482de22a84ad333e3d1e864ee3 Mon Sep 17 00:00:00 2001
From: yyhrnk <yaroslavnerest@gmail.com>
Date: Mon, 2 Feb 2026 19:48:05 +0200
Subject: [PATCH] fix: correct TxFieldSelector index upper bound

---
 bip-0346/ref-impl/src/main.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/bip-0346/ref-impl/src/main.rs b/bip-0346/ref-impl/src/main.rs
index b5193588..1fe7990e 100644
--- a/bip-0346/ref-impl/src/main.rs
+++ b/bip-0346/ref-impl/src/main.rs
@@ -174,7 +174,7 @@ fn parse_inout_selection(
                 (current_input_idx as isize + rel) as usize
             };
 
-            if idx > nb_items {
+            if idx >= nb_items {
                 return Err("selected index out of bounds");
             }
             if let Some(last) = selected.last() {