add MultipleInstanceFactory

README.md

@@ -61,8 +61,8 @@ Check config.js for actual values.
 
 With `salt` = `0x0000000000000000000000000000000000000000000000000000000047941987` address must be:
 
-1. `InstanceFactory` - `0x09110e04d5AEF747bcf7A3585D8FFC892Ab9D1Cf`
-2. `InstanceFactoryWithRegistry` - `0xC01D57d83E9Fe35E0Fb900F9D384EFcA679DF4bD`
+1. `MultipleInstanceFactory` - `0xdacb0a030Bcfc7163922d34092a822cC19D12d40`
+2. `InstanceFactoryWithRegistry` - `0x6C1F437dFd70501Ad7f152897051446cc51F1eB6`
 
 Check addresses with current config:
 
@@ -74,7 +74,7 @@ Check addresses with current config:
 Deploy InstanceFactory:
 
 ```shell
-    yarn hardhat run scripts/deployInstanceFactory.js --network mainnet
+    yarn hardhat run scripts/deployMultipleInstanceFactory.js --network mainnet
 ```
 
 Deploy InstanceFactoryWithRegistry:

contracts/InstanceFactoryWithRegistry.sol

@@ -56,7 +56,7 @@ contract InstanceFactoryWithRegistry is InstanceFactory {
   }
 
   /**
-   * @dev Throws if called by any account other than the Governance.
+   * @dev Creates new Tornado instances. Throws if called by any account other than the Governance.
    * @param _denomination denomination of new Tornado instance
    * @param _token address of ERC20 token for a new instance
    */

contracts/MultipleInstanceFactory.sol

@@ -0,0 +1,25 @@
+// SPDX-License-Identifier: MIT
+
+pragma solidity 0.7.6;
+
+import "./InstanceFactory.sol";
+
+contract MultipleInstanceFactory is InstanceFactory {
+  constructor(
+    address _verifier,
+    address _hasher,
+    uint32 _merkleTreeHeight,
+    address _owner
+  ) InstanceFactory(_verifier, _hasher, _merkleTreeHeight, _owner) {}
+
+  /**
+   * @dev Creates new Tornado instances.
+   * @param _token address of ERC20 token for a new instance
+   * @param _denominations list of denominations for each new instance
+   */
+  function createInstanceClones(address _token, uint256[] memory _denominations) external {
+    for (uint256 i = 0; i < _denominations.length; i++) {
+      createInstanceClone(_denominations[i], _token);
+    }
+  }
+}

hardhat.config.js

@@ -57,6 +57,12 @@ module.exports = {
         ? [process.env.PRIVATE_KEY]
         : { mnemonic: 'test test test test test junk' },
     },
+    goerli: {
+      url: `https://goerli.infura.io/v3/${process.env.INFURA_API_KEY}`,
+      accounts: process.env.PRIVATE_KEY
+        ? [process.env.PRIVATE_KEY]
+        : { mnemonic: 'test test test test test junk' },
+    },
     mainnet: {
       url: `https://eth-mainnet.alchemyapi.io/v2/${process.env.ALCHEMY_KEY}`,
       accounts: process.env.PRIVATE_KEY

scripts/deployMultipleInstanceFactory.js

@@ -15,7 +15,9 @@ async function main() {
   const singletonFactory = await ethers.getContractAt('SingletonFactory', config.singletonFactory)
   const contracts = await generate()
   await deploy({ ...contracts.factoryContract, singletonFactory })
-  console.log(`Instance factory contract have been deployed on ${contracts.factoryContract.address} address`)
+  console.log(
+    `MultipleInstanceFactory contract have been deployed on ${contracts.factoryContract.address} address`,
+  )
 }
 
 main()

src/generateAddresses.js

@@ -2,7 +2,7 @@ const { ethers } = require('hardhat')
 const defaultConfig = require('../config')
 
 async function generate(config = defaultConfig) {
-  const FactoryFactory = await ethers.getContractFactory('InstanceFactory')
+  const FactoryFactory = await ethers.getContractFactory('MultipleInstanceFactory')
   const deploymentBytecodeFactory =
     FactoryFactory.bytecode +
     FactoryFactory.interface
@@ -57,7 +57,7 @@ async function generate(config = defaultConfig) {
 
 async function generateWithLog() {
   const contracts = await generate()
-  console.log('Instance factory contract: ', contracts.factoryContract.address)
+  console.log('MultipleInstanceFactory contract: ', contracts.factoryContract.address)
   console.log('Instance factory with registry contract: ', contracts.factoryWithRegistryContract.address)
   return contracts
 }

test/multiple.instance.factory.test.js

@@ -8,7 +8,7 @@ const { getSignerFromAddress } = require('./utils')
 const { generate } = require('../src/generateAddresses')
 const { rbigint, createDeposit, toHex, generateProof, initialize } = require('tornado-cli')
 
-describe('Instance Factory Tests', () => {
+describe('Multiple Instance Factory Tests', () => {
   const addressZero = ethers.constants.AddressZero
 
   async function fixture() {
@@ -39,7 +39,10 @@ describe('Instance Factory Tests', () => {
         gasLimit: config.deployGasLimit,
       })
     }
-    const instanceFactory = await ethers.getContractAt('InstanceFactory', contracts.factoryContract.address)
+    const instanceFactory = await ethers.getContractAt(
+      'MultipleInstanceFactory',
+      contracts.factoryContract.address,
+    )
 
     return {
       sender,
@@ -109,6 +112,34 @@ describe('Instance Factory Tests', () => {
     expect(await instance.denomination()).to.equal(ethers.utils.parseEther('1000'))
   })
 
+  it('Should successfully add instances', async function () {
+    let { sender, instanceFactory } = await loadFixture(fixture)
+
+    const denominations = [
+      ethers.utils.parseEther('1'),
+      ethers.utils.parseEther('10'),
+      ethers.utils.parseEther('100'),
+      ethers.utils.parseEther('1000'),
+    ]
+    const numInstances = denominations.length
+
+    // deploy instances
+    await instanceFactory.connect(sender).createInstanceClones(config.COMP, denominations)
+
+    // check instance initialization
+    let logs = await instanceFactory.queryFilter('NewInstanceCloneCreated')
+    for (let i = 0; i < numInstances; i++) {
+      let instanceAddr = '0x' + logs[logs.length - numInstances + i].topics[1].slice(-40)
+      let instance = await ethers.getContractAt('ERC20TornadoCloneable', instanceAddr)
+
+      expect(await instance.token()).to.be.equal(config.COMP)
+      expect(await instance.verifier()).to.be.equal(config.verifier)
+      expect(await instance.hasher()).to.be.equal(config.hasher)
+      expect(await instance.levels()).to.be.equal(config.merkleTreeHeight)
+      expect(await instance.denomination()).to.equal(denominations[i])
+    }
+  })
+
   it('Should deposit and withdraw into the new instance', async function () {
     let { sender, instanceFactory, compToken, compWhale } = await loadFixture(fixture)