make zeros immutable

lib/utils.js

@@ -0,0 +1,28 @@
+const MiMC = require('./MiMC')
+const snarkjs = require('snarkjs')
+
+const hasher = new MiMC()
+const bigInt = snarkjs.bigInt
+
+const toHex = (number, length = 32) =>
+  '0x' +
+  (number instanceof Buffer ? number.toString('hex') : bigInt(number).toString(16)).padStart(length * 2, '0')
+
+function zeros(
+  levels,
+  defaultZero = '21663839004416932945382355908790599225266501822907911457504978515578255421292',
+) {
+  const zeros = []
+
+  let currentZero = defaultZero
+  for (let i = 0; i < levels; i++) {
+    zeros.push(toHex(currentZero))
+    currentZero = hasher.hash(levels, currentZero, currentZero)
+  }
+
+  return zeros
+}
+
+// console.log(zeros(32))
+
+module.exports = { zeros, toHex }