From c4648bae6b2cdcb705c07984678876f1d604e3fe Mon Sep 17 00:00:00 2001
From: jasonandjay <342690199@qq.com>
Date: Sun, 15 Feb 2026 09:58:44 +0800
Subject: [PATCH] fix: use correct leafVersion in control block byte for
 non-default version leaves

The P2MR control block's first byte encodes both the leaf version and
parity bit: controlBlock[0] = (leafVersion & 0xfe) | parityBit.
For the leaf with leafVersion 250 (0xFA), the correct first byte is
0xFB (with parity bit 1), not 0xC1 (which corresponds to leafVersion
192).

Fix p2mr_different_version_leaves scriptPathControlBlocks[1] first
byte from c1 to fb.
---
 bip-0360/ref-impl/common/tests/data/p2mr_construction.json | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/bip-0360/ref-impl/common/tests/data/p2mr_construction.json b/bip-0360/ref-impl/common/tests/data/p2mr_construction.json
index f6d76d07ca..35bdf8bea6 100644
--- a/bip-0360/ref-impl/common/tests/data/p2mr_construction.json
+++ b/bip-0360/ref-impl/common/tests/data/p2mr_construction.json
@@ -87,7 +87,7 @@
                 "bip350Address": "bc1zdskuzp4ts94h87ws0c7drmev3sf9dagewj8qsylyahfyqhf800hsam4d6e",
                 "scriptPathControlBlocks": [
                     "c1f224a923cd0021ab202ab139cc56802ddb92dcfc172b9212261a539df79a112a",
-                    "c18ad69ec7cf41c2a4001fd1f738bf1e505ce2277acdcaa63fe4765192497f47a7"
+                    "fb8ad69ec7cf41c2a4001fd1f738bf1e505ce2277acdcaa63fe4765192497f47a7"
                 ]
             }
         },