check tornado withdraw fee

src/utils.js

@@ -1,12 +1,6 @@
 const { instances, netId } = require('../config')
 const { poseidon } = require('circomlib')
-const { toBN, toChecksumAddress } = require('web3-utils')
-
-const jobType = Object.freeze({
-  TORNADO_WITHDRAW: 'TORNADO_WITHDRAW',
-  MINING_REWARD: 'MINING_REWARD',
-  MINING_WITHDRAW: 'MINING_WITHDRAW',
-})
+const { toBN, toChecksumAddress, BN } = require('web3-utils')
 
 const sleep = ms => new Promise(res => setTimeout(res, ms))
 
@@ -49,11 +43,76 @@ function when(source, event) {
   })
 }
 
+function getArgsForOracle() {
+  const tokens = instances.netId1
+  const tokenAddresses = []
+  const oneUintAmount = []
+  const currencyLookup = {}
+  Object.entries(tokens).map(([currency, data]) => {
+    if (currency !== 'eth') {
+      tokenAddresses.push(data.tokenAddress)
+      oneUintAmount.push(toBN('10').pow(toBN(data.decimals.toString())).toString())
+      currencyLookup[data.tokenAddress] = currency
+    }
+  })
+  return { tokenAddresses, oneUintAmount, currencyLookup }
+}
+
+function fromDecimals(value, decimals) {
+  value = value.toString()
+  let ether = value.toString()
+  const base = new BN('10').pow(new BN(decimals))
+  const baseLength = base.toString(10).length - 1 || 1
+
+  const negative = ether.substring(0, 1) === '-'
+  if (negative) {
+    ether = ether.substring(1)
+  }
+
+  if (ether === '.') {
+    throw new Error('[ethjs-unit] while converting number ' + value + ' to wei, invalid value')
+  }
+
+  // Split it into a whole and fractional part
+  const comps = ether.split('.')
+  if (comps.length > 2) {
+    throw new Error('[ethjs-unit] while converting number ' + value + ' to wei,  too many decimal points')
+  }
+
+  let whole = comps[0]
+  let fraction = comps[1]
+
+  if (!whole) {
+    whole = '0'
+  }
+  if (!fraction) {
+    fraction = '0'
+  }
+  if (fraction.length > baseLength) {
+    throw new Error('[ethjs-unit] while converting number ' + value + ' to wei, too many decimal places')
+  }
+
+  while (fraction.length < baseLength) {
+    fraction += '0'
+  }
+
+  whole = new BN(whole)
+  fraction = new BN(fraction)
+  let wei = whole.mul(base).add(fraction)
+
+  if (negative) {
+    wei = wei.mul(negative)
+  }
+
+  return new BN(wei.toString(10), 10)
+}
+
 module.exports = {
   getInstance,
   setSafeInterval,
   poseidonHash2,
   sleep,
   when,
-  jobType,
+  getArgsForOracle,
+  fromDecimals,
 }