From b05f46b9d16b33579a3f1f8efa72769c905fd299 Mon Sep 17 00:00:00 2001
From: ricecodekhmer <151774852+ricecodekhmer@users.noreply.github.com>
Date: Sun, 30 Mar 2025 16:04:06 +0100
Subject: [PATCH] improve error message in Proof::new to include actual lengths

---
 common/append_merkle/src/proof.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/common/append_merkle/src/proof.rs b/common/append_merkle/src/proof.rs
index f7386c6..db7ad04 100644
--- a/common/append_merkle/src/proof.rs
+++ b/common/append_merkle/src/proof.rs
@@ -13,7 +13,7 @@ impl<T: HashElement> Proof<T> {
     /// Creates new MT inclusion proof
     pub fn new(hash: Vec<T>, path: Vec<bool>) -> Result<Proof<T>> {
         if hash.len() != path.len() + 2 {
-            bail!("hash and path length mismatch");
+            bail!("Proof::new: expected hash length = path.len() + 2, but got {} and {}", hash.len(), path.len());
         }
         Ok(Proof { lemma: hash, path })
     }