Merge pull request #826 from EYBlockchain/ilyas/small-fixes

Small changes to Poseidon Sol

Author: RogerTaule

common-files/utils/crypto/merkle-tree/utils.mjs

@@ -182,8 +182,7 @@ function shaHash(...items) {
 function poseidonHash(...items) {
 const inputs = items.map(i => generalise(i));
 const hash = poseidonHashFunction(inputs);
-console.log('--------------------------------------------');
-return `0x${hash.hex().slice(2).padStart(64, '0')}`;
+return hash.hex(32);
 }
 
 function concatenateThenHash(hashType, ...items) {

nightfall-deployer/contracts/Poseidon.sol

@@ -1,3 +1,7 @@
+// SPDX-License-Identifier: CC0-1.0
+// This is adapted from https://.com/Loopring/
+// but converted for our specific 2-input hash variety
+// We are grateful for the work done by Loopring.
 pragma solidity ^0.8.0;
 
 library Poseidon