From dcdad27245917bd1ccd09c27ebe2f4879f04a3da Mon Sep 17 00:00:00 2001
From: twister-dev <twister-cash@protonmail.com>
Date: Sat, 1 Oct 2022 10:07:52 -0700
Subject: [PATCH] fix(incremental-merkle-tree.sol): ensure proofPathIndices is
 binary when recovering updateIndex

---
 .../contracts/IncrementalBinaryTree.sol                         | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/incremental-merkle-tree.sol/contracts/IncrementalBinaryTree.sol b/packages/incremental-merkle-tree.sol/contracts/IncrementalBinaryTree.sol
index 10046e6..326796a 100644
--- a/packages/incremental-merkle-tree.sol/contracts/IncrementalBinaryTree.sol
+++ b/packages/incremental-merkle-tree.sol/contracts/IncrementalBinaryTree.sol
@@ -102,7 +102,7 @@ library IncrementalBinaryTree {
 
         uint256 updateIndex;
         for (uint8 i = 0; i < depth; ) {
-            updateIndex |= uint(proofPathIndices[i]) << uint(i);
+            updateIndex |= uint(proofPathIndices[i] & 1) << uint(i);
             if (proofPathIndices[i] == 0) {
                 if (proofSiblings[i] == self.lastSubtrees[i][1]) {
                     self.lastSubtrees[i][0] = hash;