Fix merkle multiProof for single leaf tree (#3446)

2022-06-01 22:21:56 +02:00
parent 6766b2de3b
commit 2b0b0bb186
2 changed files with 27 additions and 1 deletions
--- a/contracts/utils/cryptography/MerkleProof.sol
+++ b/contracts/utils/cryptography/MerkleProof.sol
@ -105,7 +105,13 @@ library MerkleProof {
            hashes[i] = _hashPair(a, b);
        }

-        return hashes[totalHashes - 1];
+        if (totalHashes > 0) {
+            return hashes[totalHashes - 1];
+        } else if (leafsLen > 0) {
+            return leafs[0];
+        } else {
+            return proofs[0];
+        }
    }

    function _hashPair(bytes32 a, bytes32 b) private pure returns (bytes32) {