change dir structure

lib/utils.js

@@ -1,28 +0,0 @@
-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 }

package.json

@@ -10,7 +10,7 @@
     "build:circuit:contract": "npx snarkjs generateverifier -v build/circuits/Verifier.sol --vk build/circuits/withdraw_verification_key.json",
     "build:circuit": "mkdir -p build/circuits && npm run build:circuit:compile && npm run build:circuit:setup && npm run build:circuit:bin && npm run build:circuit:contract",
     "build:contract": "npx truffle compile",
-    "build:browserify": "npx browserify cli.js -o index.js --exclude worker_threads",
+    "build:browserify": "npx browserify src/cli.js -o index.js --exclude worker_threads",
     "build": "npm run build:circuit && npm run build:contract && npm run build:browserify",
     "browserify": "npm run build:browserify",
     "test": "npx truffle test",
@@ -24,7 +24,7 @@
     "prettier:fix": "prettier --write . --config .prettierrc",
     "lint": "yarn eslint && yarn prettier:check",
     "flat": "npx truffle-flattener contracts/ETHTornado.sol > ETHTornado_flat.sol && npx truffle-flattener contracts/ERC20Tornado.sol > ERC20Tornado_flat.sol",
-    "download": "node downloadKeys.js"
+    "download": "node scripts/downloadKeys.js"
   },
   "keywords": [],
   "author": "",

scripts/compileHasher.js

@@ -6,7 +6,7 @@ const genContract = require('circomlib/src/mimcsponge_gencontract.js')
 
 // where Truffle will expect to find the results of the external compiler
 // command
-const outputPath = path.join(__dirname, 'build', 'Hasher.json')
+const outputPath = path.join(__dirname, '..', 'build', 'Hasher.json')
 
 function main() {
   const contract = {

scripts/downloadKeys.js

@@ -2,8 +2,8 @@ const axios = require('axios')
 const path = require('path')
 const fs = require('fs')
 const files = ['withdraw.json', 'withdraw_proving_key.bin', 'Verifier.sol', 'withdraw_verification_key.json']
-const circuitsPath = 'build/circuits'
-const contractsPath = 'build/contracts'
+const circuitsPath = __dirname + '/../build/circuits'
+const contractsPath = __dirname + '/../build/contracts'
 
 async function downloadFile({ url, path }) {
   const writer = fs.createWriteStream(path)

src/cli.js

@@ -134,7 +134,8 @@ async function generateMerkleProof(deposit) {
   assert(leafIndex >= 0, 'The deposit is not found in the tree')
 
   // Compute merkle proof of our commitment
-  return tree.path(leafIndex)
+  const { pathElements, pathIndices } = tree.path(leafIndex)
+  return { pathElements, pathIndices, root: tree.root() }
 }
 
 /**
@@ -439,7 +440,7 @@ async function loadDepositData({ deposit }) {
 }
 async function loadWithdrawalData({ amount, currency, deposit }) {
   try {
-    const events = await await tornado.getPastEvents('Withdrawal', {
+    const events = await tornado.getPastEvents('Withdrawal', {
       fromBlock: 0,
       toBlock: 'latest',
     })
@@ -487,9 +488,9 @@ async function init({ rpc, noteNetId, currency = 'dai', amount = '100' }) {
   } else {
     // Initialize from local node
     web3 = new Web3(rpc, null, { transactionConfirmationBlocks: 1 })
-    contractJson = require('./build/contracts/ETHTornado.json')
-    circuit = require('./build/circuits/withdraw.json')
-    proving_key = fs.readFileSync('build/circuits/withdraw_proving_key.bin').buffer
+    contractJson = require(__dirname + '/../build/contracts/ETHTornado.json')
+    circuit = require(__dirname + '/../build/circuits/withdraw.json')
+    proving_key = fs.readFileSync(__dirname + '/../build/circuits/withdraw_proving_key.bin').buffer
     MERKLE_TREE_HEIGHT = process.env.MERKLE_TREE_HEIGHT || 20
     ETH_AMOUNT = process.env.ETH_AMOUNT
     TOKEN_AMOUNT = process.env.TOKEN_AMOUNT
@@ -502,8 +503,8 @@ async function init({ rpc, noteNetId, currency = 'dai', amount = '100' }) {
     } else {
       console.log('Warning! PRIVATE_KEY not found. Please provide PRIVATE_KEY in .env file if you deposit')
     }
-    erc20ContractJson = require('./build/contracts/ERC20Mock.json')
-    erc20tornadoJson = require('./build/contracts/ERC20Tornado.json')
+    erc20ContractJson = require(__dirname + '/../build/contracts/ERC20Mock.json')
+    erc20tornadoJson = require(__dirname + '/../build/contracts/ERC20Tornado.json')
   }
   // groth16 initialises a lot of Promises that will never be resolved, that's why we need to use process.exit to terminate the CLI
   groth16 = await buildGroth16()

src/minimal-demo.js

@@ -106,7 +106,8 @@ async function generateMerkleProof(deposit) {
   assert(leafIndex >= 0, 'The deposit is not found in the tree')
 
   // Compute merkle proof of our commitment
-  return tree.path(leafIndex)
+  const { pathElements, pathIndices } = tree.path(leafIndex)
+  return { pathElements, pathIndices, root: tree.root() }
 }
 
 /**
@@ -116,7 +117,7 @@ async function generateMerkleProof(deposit) {
  */
 async function generateSnarkProof(deposit, recipient) {
   // Compute merkle proof of our commitment
-  const { root, pathElements, pathIndices } = generateMerkleProof(deposit)
+  const { root, pathElements, pathIndices } = await generateMerkleProof(deposit)
 
   // Prepare circuit input
   const input = {
@@ -155,11 +156,11 @@ async function main() {
   web3 = new Web3(new Web3.providers.HttpProvider(RPC_URL, { timeout: 5 * 60 * 1000 }), null, {
     transactionConfirmationBlocks: 1,
   })
-  circuit = require('./build/circuits/withdraw.json')
-  proving_key = fs.readFileSync('build/circuits/withdraw_proving_key.bin').buffer
+  circuit = require(__dirname + '/../build/circuits/withdraw.json')
+  proving_key = fs.readFileSync(__dirname + '/../build/circuits/withdraw_proving_key.bin').buffer
   groth16 = await buildGroth16()
   netId = await web3.eth.net.getId()
-  contract = new web3.eth.Contract(require('./build/contracts/ETHTornado.json').abi, CONTRACT_ADDRESS)
+  contract = new web3.eth.Contract(require('../build/contracts/ETHTornado.json').abi, CONTRACT_ADDRESS)
   const account = web3.eth.accounts.privateKeyToAccount('0x' + PRIVATE_KEY)
   web3.eth.accounts.wallet.add('0x' + PRIVATE_KEY)
   // eslint-disable-next-line require-atomic-updates

test/ERC20Tornado.test.js

@@ -3,7 +3,7 @@ require('chai').use(require('bn-chai')(web3.utils.BN)).use(require('chai-as-prom
 const fs = require('fs')
 
 const { toBN } = require('web3-utils')
-const { takeSnapshot, revertSnapshot } = require('../lib/ganacheHelper')
+const { takeSnapshot, revertSnapshot } = require('../scripts/ganacheHelper')
 
 const Tornado = artifacts.require('./ERC20Tornado.sol')
 const BadRecipient = artifacts.require('./BadRecipient.sol')

test/ETHTornado.test.js

@@ -3,7 +3,7 @@ require('chai').use(require('bn-chai')(web3.utils.BN)).use(require('chai-as-prom
 const fs = require('fs')
 
 const { toBN, randomHex } = require('web3-utils')
-const { takeSnapshot, revertSnapshot } = require('../lib/ganacheHelper')
+const { takeSnapshot, revertSnapshot } = require('../scripts/ganacheHelper')
 
 const Tornado = artifacts.require('./ETHTornado.sol')
 const { ETH_AMOUNT, MERKLE_TREE_HEIGHT } = process.env

test/MerkleTreeWithHistory.test.js

@@ -1,7 +1,7 @@
 /* global artifacts, web3, contract */
 require('chai').use(require('bn-chai')(web3.utils.BN)).use(require('chai-as-promised')).should()
 
-const { takeSnapshot, revertSnapshot } = require('../lib/ganacheHelper')
+const { takeSnapshot, revertSnapshot } = require('../scripts/ganacheHelper')
 
 const MerkleTreeWithHistory = artifacts.require('./MerkleTreeWithHistoryMock.sol')
 const hasherContract = artifacts.require('./Hasher.sol')

truffle-config.js

@@ -1,10 +1,6 @@
 require('dotenv').config()
 const HDWalletProvider = require('@truffle/hdwallet-provider')
 const utils = require('web3-utils')
-// const infuraKey = "fj4jll3k.....";
-//
-// const fs = require('fs');
-// const mnemonic = fs.readFileSync(".secret").toString().trim();
 
 module.exports = {
   /**
@@ -18,30 +14,11 @@ module.exports = {
    */
 
   networks: {
-    // Useful for testing. The `development` name is special - truffle uses it by default
-    // if it's defined here and no other network is specified at the command line.
-    // You should run a client (like ganache-cli, geth or parity) in a separate terminal
-    // tab if you use this network and you must also set the `host`, `port` and `network_id`
-    // options below to some value.
-
     development: {
       host: '127.0.0.1', // Localhost (default: none)
       port: 8545, // Standard Ethereum port (default: none)
       network_id: '*', // Any network (default: none)
     },
-
-    // Another network with more advanced options...
-    // advanced: {
-    //   port: 8777,             // Custom port
-    //   network_id: 1342,       // Custom network
-    //   gas: 8500000,           // Gas sent with each transaction (default: ~6700000)
-    //   gasPrice: 20000000000,  // 20 gwei (in wei) (default: 100 gwei)
-    //   from: <address>,        // Account to send txs from (default: accounts[0])
-    //   websockets: true        // Enable EventEmitter interface for web3 (default: false)
-    // },
-
-    // Useful for deploying to a public network.
-    // NB: It's important to wrap the provider as a function.
     kovan: {
       provider: () =>
         new HDWalletProvider(
@@ -90,16 +67,8 @@ module.exports = {
       // timeoutBlocks: 200,
       skipDryRun: true,
     },
-
-    // Useful for private networks
-    // private: {
-    //   provider: () => new HDWalletProvider(mnemonic, `https://network.io`),
-    //   network_id: 2111,   // This network is yours, in the cloud.
-    //   production: true    // Treats this network as if it was a public net. (default: false)
-    // }
   },
 
-  // Set default mocha options here, use special reporters etc.
   mocha: {
     // timeout: 100000
   },
@@ -107,19 +76,16 @@ module.exports = {
   // Configure your compilers
   compilers: {
     solc: {
-      version: '0.7.6', // Fetch exact version from solc-bin (default: truffle's version)
-      // docker: true,        // Use "0.5.1" you've installed locally with docker (default: false)
+      version: '0.7.6',
       settings: {
-        // See the solidity docs for advice about optimization and evmVersion
         optimizer: {
           enabled: true,
           runs: 200,
         },
-        // evmVersion: "byzantium"
       },
     },
     external: {
-      command: 'node ./compileHasher.js',
+      command: 'node ./scripts/compileHasher.js',
       targets: [
         {
           path: './build/Hasher.json',