From ec30e2d357c5995c6d942703a708e9b1849784fc Mon Sep 17 00:00:00 2001
From: Drygin <drygin@smartdec.ru>
Date: Wed, 4 Sep 2019 13:31:10 +0300
Subject: [PATCH] fix merkle tree capacity

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

diff --git a/contracts/MerkleTreeWithHistory.sol b/contracts/MerkleTreeWithHistory.sol
index a374bff..74a4bc3 100644
--- a/contracts/MerkleTreeWithHistory.sol
+++ b/contracts/MerkleTreeWithHistory.sol
@@ -58,7 +58,7 @@ contract MerkleTreeWithHistory {
 
   function _insert(uint256 leaf) internal {
     uint32 current_index = next_index;
-    require(current_index != 2**(levels - 1), "Merkle tree is full");
+    require(current_index != 2**levels, "Merkle tree is full");
     next_index += 1;
     uint256 current_level_hash = leaf;
     uint256 left;