additional eth for the recipient
This commit is contained in:
Alexey
parent
0f5a5df522
commit
9f33aadd9d
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@ -1,6 +1,7 @@
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MERKLE_TREE_HEIGHT=16
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# in wei
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AMOUNT=1000000000000000000
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ETH_AMOUNT=100000000000000000
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TOKEN_AMOUNT=100000000000000000
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EMPTY_ELEMENT=1337
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PRIVATE_KEY=
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ERC20_TOKEN=
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@ -94,3 +94,5 @@ typings/
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# DynamoDB Local files
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.dynamodb/
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ERC20Mixer_flat.sol
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ETHMixer_flat.sol
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13
README.md
13
README.md
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@ -41,6 +41,19 @@ spent since it has the same nullifier and it will prevent you from withdrawing y
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1. `npx http-server` - serve current dir, you can use any other http server
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1. Open `localhost:8080`
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## Deploy ETH Tornado Cash
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1. `cp .env.example .env`
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1. Tune all necessary params
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1. `npx truffle migrate --f 2 --to 4`
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## Deploy ERC20 Tornado Cash
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1. `cp .env.example .env`
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1. Tune all necessary params
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1. `npx truffle migrate --f 2 --to 3`
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1. `npx truffle migrate --f 5`
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**Note**. If you want to reuse the same verifier for all the mixers, then after you deployed one of the mixers you should only run 4th or 5th migration for ETH or ERC20 mixers respectively (`--f 4 --to 4` or `--f 5`).
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## Credits
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Special thanks to @barryWhiteHat and @kobigurk for valuable input,
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8
cli.js
8
cli.js
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@ -13,7 +13,7 @@ const buildGroth16 = require('websnark/src/groth16')
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const websnarkUtils = require('websnark/src/utils')
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let web3, mixer, circuit, proving_key, groth16
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let MERKLE_TREE_HEIGHT, AMOUNT, EMPTY_ELEMENT
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let MERKLE_TREE_HEIGHT, ETH_AMOUNT, EMPTY_ELEMENT
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const inBrowser = (typeof window !== 'undefined')
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const rbigint = (nbytes) => snarkjs.bigInt.leBuff2int(crypto.randomBytes(nbytes))
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@ -30,7 +30,7 @@ async function deposit() {
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const deposit = createDeposit(rbigint(31), rbigint(31))
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console.log('Submitting deposit transaction')
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await mixer.methods.deposit('0x' + deposit.commitment.toString(16)).send({ value: AMOUNT, from: (await web3.eth.getAccounts())[0], gas:1e6 })
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await mixer.methods.deposit('0x' + deposit.commitment.toString(16)).send({ value: ETH_AMOUNT, from: (await web3.eth.getAccounts())[0], gas:1e6 })
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const note = '0x' + deposit.preimage.toString('hex')
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console.log('Your note:', note)
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@ -103,7 +103,7 @@ async function init() {
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circuit = await (await fetch('build/circuits/withdraw.json')).json()
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proving_key = await (await fetch('build/circuits/withdraw_proving_key.bin')).arrayBuffer()
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MERKLE_TREE_HEIGHT = 16
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AMOUNT = 1e18
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ETH_AMOUNT = 1e18
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EMPTY_ELEMENT = 0
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} else {
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web3 = new Web3('http://localhost:8545', null, { transactionConfirmationBlocks: 1 })
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@ -112,7 +112,7 @@ async function init() {
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proving_key = fs.readFileSync('build/circuits/withdraw_proving_key.bin').buffer
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require('dotenv').config()
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MERKLE_TREE_HEIGHT = process.env.MERKLE_TREE_HEIGHT
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AMOUNT = process.env.AMOUNT
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ETH_AMOUNT = process.env.ETH_AMOUNT
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EMPTY_ELEMENT = process.env.EMPTY_ELEMENT
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}
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groth16 = await buildGroth16()
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@ -16,38 +16,61 @@ import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
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contract ERC20Mixer is Mixer {
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IERC20 public token;
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// mixed token amount
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uint256 public tokenDenomination;
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// ether value to cover network fee (for relayer) and to have some ETH on a brand new address
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uint256 public etherFeeDenomination;
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constructor(
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address _verifier,
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uint256 _transferValue,
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uint256 _etherFeeDenomination,
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uint8 _merkleTreeHeight,
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uint256 _emptyElement,
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address payable _operator,
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IERC20 _token
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) Mixer(_verifier, _transferValue, _merkleTreeHeight, _emptyElement, _operator) public {
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IERC20 _token,
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uint256 _tokenDenomination
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) Mixer(_verifier, _merkleTreeHeight, _emptyElement, _operator) public {
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token = _token;
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tokenDenomination = _tokenDenomination;
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etherFeeDenomination = _etherFeeDenomination;
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}
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function deposit(uint256 commitment) public {
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require(token.transferFrom(msg.sender, address(this), transferValue), "Approve before using");
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/**
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@dev Deposit funds into the mixer. The caller must send ETH value equal to `etherFeeDenomination` of this mixer.
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The caller also has to have at least `tokenDenomination` amount approved for the mixer.
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@param commitment the note commitment, which is PedersenHash(nullifier + secret)
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*/
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function deposit(uint256 commitment) public payable {
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require(msg.value == etherFeeDenomination, "Please send `etherFeeDenomination` ETH along with transaction");
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require(token.transferFrom(msg.sender, address(this), tokenDenomination), "Approve before using");
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_deposit(commitment);
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emit Deposit(commitment, next_index - 1, block.timestamp);
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}
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/**
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@dev Withdraw deposit from the mixer. `a`, `b`, and `c` are zkSNARK proof data, and input is an array of circuit public inputs
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`input` array consists of:
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- merkle root of all deposits in the mixer
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- hash of unique deposit nullifier to prevent double spends
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- the receiver of funds
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- optional fee that goes to the transaction sender (usually a relay)
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*/
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function withdraw(uint256[2] memory a, uint256[2][2] memory b, uint256[2] memory c, uint256[4] memory input) public {
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_withdraw(a, b, c, input);
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address receiver = address(input[2]);
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address payable receiver = address(input[2]);
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uint256 fee = input[3];
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uint256 nullifierHash = input[1];
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require(fee < transferValue, "Fee exceeds transfer value");
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token.transfer(receiver, transferValue - fee);
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require(fee < etherFeeDenomination, "Fee exceeds transfer value");
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receiver.transfer(etherFeeDenomination - fee);
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if (fee > 0) {
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token.transfer(operator, fee);
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operator.transfer(fee);
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}
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token.transfer(receiver, tokenDenomination);
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emit Withdraw(receiver, nullifierHash, fee);
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}
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}
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@ -14,30 +14,45 @@ pragma solidity ^0.5.8;
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import "./Mixer.sol";
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contract ETHMixer is Mixer {
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uint256 public etherDenomination;
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constructor(
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address _verifier,
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uint256 _transferValue,
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uint256 _etherDenomination,
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uint8 _merkleTreeHeight,
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uint256 _emptyElement,
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address payable _operator
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) Mixer(_verifier, _transferValue, _merkleTreeHeight, _emptyElement, _operator) public {}
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) Mixer(_verifier, _merkleTreeHeight, _emptyElement, _operator) public {
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etherDenomination = _etherDenomination;
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}
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/**
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@dev Deposit funds into mixer. The caller must send value equal to `etherDenomination` of this mixer.
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@param commitment the note commitment, which is PedersenHash(nullifier + secret)
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*/
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function deposit(uint256 commitment) public payable {
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require(msg.value == transferValue, "Please send `transferValue` ETH along with transaction");
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require(msg.value == etherDenomination, "Please send `etherDenomination` ETH along with transaction");
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_deposit(commitment);
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emit Deposit(commitment, next_index - 1, block.timestamp);
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}
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/**
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@dev Withdraw deposit from the mixer. `a`, `b`, and `c` are zkSNARK proof data, and input is an array of circuit public inputs
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`input` array consists of:
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- merkle root of all deposits in the mixer
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- hash of unique deposit nullifier to prevent double spends
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- the receiver of funds
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- optional fee that goes to the transaction sender (usually a relay)
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*/
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function withdraw(uint256[2] memory a, uint256[2][2] memory b, uint256[2] memory c, uint256[4] memory input) public {
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_withdraw(a, b, c, input);
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address payable receiver = address(input[2]);
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uint256 fee = input[3];
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uint256 nullifierHash = input[1];
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require(fee < transferValue, "Fee exceeds transfer value");
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receiver.transfer(transferValue - fee);
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require(fee < etherDenomination, "Fee exceeds transfer value");
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receiver.transfer(etherDenomination - fee);
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if (fee > 0) {
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operator.transfer(fee);
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}
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@ -18,7 +18,6 @@ contract IVerifier {
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}
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contract Mixer is MerkleTreeWithHistory {
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uint256 public transferValue;
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bool public isDepositsEnabled = true;
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// operator can disable new deposits in case of emergency
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// it also receives a relayer fee
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@ -34,24 +33,20 @@ contract Mixer is MerkleTreeWithHistory {
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/**
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@dev The constructor
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@param _verifier the address of SNARK verifier for this contract
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@param _transferValue the value for all deposits in this contract in wei
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@param _merkleTreeHeight the height of deposits' Merkle Tree
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@param _emptyElement default element of the deposits' Merkle Tree
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@param _operator operator address (see operator above)
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*/
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constructor(
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address _verifier,
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uint256 _transferValue,
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uint8 _merkleTreeHeight,
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uint256 _emptyElement,
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address payable _operator
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) MerkleTreeWithHistory(_merkleTreeHeight, _emptyElement) public {
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verifier = IVerifier(_verifier);
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transferValue = _transferValue;
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operator = _operator;
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}
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/**
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@dev Deposit funds into mixer. The caller must send value equal to `transferValue` of this mixer.
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@param commitment the note commitment, which is PedersenHash(nullifier + secret)
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*/
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function _deposit(uint256 commitment) internal {
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require(isDepositsEnabled, "deposits disabled");
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require(!commitments[commitment], "The commitment has been submitted");
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@ -59,14 +54,6 @@ contract Mixer is MerkleTreeWithHistory {
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commitments[commitment] = true;
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}
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/**
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@dev Withdraw deposit from the mixer. `a`, `b`, and `c` are zkSNARK proof data, and input is an array of circuit public inputs
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`input` array consists of:
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- merkle root of all deposits in the mixer
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- hash of unique deposit nullifier to prevent double spends
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- the receiver of funds
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- optional fee that goes to the transaction sender (usually a relay)
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*/
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function _withdraw(uint256[2] memory a, uint256[2][2] memory b, uint256[2] memory c, uint256[4] memory input) internal {
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uint256 root = input[0];
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uint256 nullifierHash = input[1];
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@ -7,11 +7,11 @@ const MiMC = artifacts.require('MiMC')
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module.exports = function(deployer, network, accounts) {
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return deployer.then(async () => {
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const { MERKLE_TREE_HEIGHT, AMOUNT, EMPTY_ELEMENT } = process.env
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const { MERKLE_TREE_HEIGHT, ETH_AMOUNT, EMPTY_ELEMENT } = process.env
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const verifier = await Verifier.deployed()
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const miMC = await MiMC.deployed()
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await ETHMixer.link(MiMC, miMC.address)
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const mixer = await deployer.deploy(ETHMixer, verifier.address, AMOUNT, MERKLE_TREE_HEIGHT, EMPTY_ELEMENT, accounts[0])
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const mixer = await deployer.deploy(ETHMixer, verifier.address, ETH_AMOUNT, MERKLE_TREE_HEIGHT, EMPTY_ELEMENT, accounts[0])
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console.log('ETHMixer\'s address ', mixer.address)
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})
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}
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@ -8,7 +8,7 @@ const ERC20Mock = artifacts.require('ERC20Mock')
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module.exports = function(deployer, network, accounts) {
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return deployer.then(async () => {
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const { MERKLE_TREE_HEIGHT, AMOUNT, EMPTY_ELEMENT, ERC20_TOKEN } = process.env
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const { MERKLE_TREE_HEIGHT, ETH_AMOUNT, EMPTY_ELEMENT, ERC20_TOKEN, TOKEN_AMOUNT } = process.env
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const verifier = await Verifier.deployed()
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const miMC = await MiMC.deployed()
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await ERC20Mixer.link(MiMC, miMC.address)
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@ -20,11 +20,12 @@ module.exports = function(deployer, network, accounts) {
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const mixer = await deployer.deploy(
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ERC20Mixer,
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verifier.address,
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AMOUNT,
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ETH_AMOUNT,
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MERKLE_TREE_HEIGHT,
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EMPTY_ELEMENT,
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accounts[0],
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token
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token,
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TOKEN_AMOUNT
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)
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console.log('ERC20Mixer\'s address ', mixer.address)
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})
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@ -16,7 +16,7 @@
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"migrate:dev": "npx truffle migrate --network development --reset",
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"browserify": "npx browserify cli.js -o index.js --exclude worker_threads",
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"eslint": "npx eslint --ignore-path .gitignore .",
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"flat": "truffle-flattener contracts/Mixer.sol > Mixer_flat.sol"
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"flat": "truffle-flattener contracts/ETHMixer.sol > ETHMixer_flat.sol contracts/ERC20Mixer.sol > ERC20Mixer_flat.sol"
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},
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"keywords": [],
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"author": "",
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@ -5,17 +5,16 @@ require('chai')
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.should()
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const fs = require('fs')
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const { toBN, toHex, randomHex } = require('web3-utils')
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const { toBN, toHex } = require('web3-utils')
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const { takeSnapshot, revertSnapshot } = require('../lib/ganacheHelper')
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const Mixer = artifacts.require('./ERC20Mixer.sol')
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const Token = artifacts.require('./ERC20Mock.sol')
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const { AMOUNT, MERKLE_TREE_HEIGHT, EMPTY_ELEMENT } = process.env
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const { ETH_AMOUNT, TOKEN_AMOUNT, MERKLE_TREE_HEIGHT, EMPTY_ELEMENT } = process.env
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const websnarkUtils = require('websnark/src/utils')
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const buildGroth16 = require('websnark/src/groth16')
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const stringifyBigInts = require('websnark/tools/stringifybigint').stringifyBigInts
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const unstringifyBigInts2 = require('snarkjs/src/stringifybigint').unstringifyBigInts
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const snarkjs = require('snarkjs')
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const bigInt = snarkjs.bigInt
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const crypto = require('crypto')
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@ -35,15 +34,6 @@ function generateDeposit() {
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return deposit
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}
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// eslint-disable-next-line no-unused-vars
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function BNArrayToStringArray(array) {
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const arrayToPrint = []
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array.forEach(item => {
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arrayToPrint.push(item.toString())
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})
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return arrayToPrint
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}
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function getRandomReceiver() {
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let receiver = rbigint(20)
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while (toHex(receiver.toString()).length !== 42) {
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@ -52,24 +42,19 @@ function getRandomReceiver() {
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return receiver
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}
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function snarkVerify(proof) {
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proof = unstringifyBigInts2(websnarkUtils.fromSolidityInput(proof))
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const verification_key = unstringifyBigInts2(require('../build/circuits/withdraw_verification_key.json'))
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return snarkjs['groth'].isValid(verification_key, proof, proof.publicSignals)
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}
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contract('Mixer', accounts => {
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contract('ERC20Mixer', accounts => {
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let mixer
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let token
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const sender = accounts[0]
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const operator = accounts[0]
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const levels = MERKLE_TREE_HEIGHT || 16
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const zeroValue = EMPTY_ELEMENT || 1337
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const value = AMOUNT || '1000000000000000000' // 1 ether
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const tokenDenomination = TOKEN_AMOUNT || '1000000000000000000' // 1 ether
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const value = ETH_AMOUNT || '1000000000000000000' // 1 ether
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let snapshotId
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let prefix = 'test'
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let tree
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const fee = bigInt(AMOUNT).shr(1) || bigInt(1e17)
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const fee = bigInt(ETH_AMOUNT).shr(1) || bigInt(1e17)
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const receiver = getRandomReceiver()
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const relayer = accounts[1]
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let groth16
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@ -85,7 +70,7 @@ contract('Mixer', accounts => {
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)
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mixer = await Mixer.deployed()
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token = await Token.deployed()
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await token.mint(sender, value)
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await token.mint(sender, tokenDenomination)
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snapshotId = await takeSnapshot()
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groth16 = await buildGroth16()
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circuit = require('../build/circuits/withdraw.json')
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@ -102,9 +87,9 @@ contract('Mixer', accounts => {
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describe('#deposit', () => {
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it('should work', async () => {
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const commitment = 43
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await token.approve(mixer.address, value)
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await token.approve(mixer.address, tokenDenomination)
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let { logs } = await mixer.deposit(commitment, { from: sender })
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let { logs } = await mixer.deposit(commitment, { value, from: sender })
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logs[0].event.should.be.equal('Deposit')
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logs[0].args.commitment.should.be.eq.BN(toBN(commitment))
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@ -117,17 +102,17 @@ contract('Mixer', accounts => {
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const deposit = generateDeposit()
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const user = accounts[4]
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await tree.insert(deposit.commitment)
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await token.mint(user, value)
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await token.mint(user, tokenDenomination)
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const balanceUserBefore = await token.balanceOf(user)
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await token.approve(mixer.address, value, { from: user })
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await token.approve(mixer.address, tokenDenomination, { from: user })
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// Uncomment to measure gas usage
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// let gas = await mixer.deposit.estimateGas(toBN(deposit.commitment.toString()), { value, from: user, gasPrice: '0' })
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// console.log('deposit gas:', gas)
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await mixer.deposit(toBN(deposit.commitment.toString()), { from: user, gasPrice: '0' })
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await mixer.deposit(toBN(deposit.commitment.toString()), { value, from: user, gasPrice: '0' })
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|
||||
const balanceUserAfter = await token.balanceOf(user)
|
||||
balanceUserAfter.should.be.eq.BN(toBN(balanceUserBefore).sub(toBN(value)))
|
||||
balanceUserAfter.should.be.eq.BN(toBN(balanceUserBefore).sub(toBN(tokenDenomination)))
|
||||
|
||||
const { root, path_elements, path_index } = await tree.path(0)
|
||||
|
||||
|
|
@ -152,8 +137,9 @@ contract('Mixer', accounts => {
|
|||
|
||||
const balanceMixerBefore = await token.balanceOf(mixer.address)
|
||||
const balanceRelayerBefore = await token.balanceOf(relayer)
|
||||
const balanceOperatorBefore = await token.balanceOf(operator)
|
||||
const ethBalanceOperatorBefore = await web3.eth.getBalance(operator)
|
||||
const balanceRecieverBefore = await token.balanceOf(toHex(receiver.toString()))
|
||||
const ethBalanceRecieverBefore = await web3.eth.getBalance(toHex(receiver.toString()))
|
||||
let isSpent = await mixer.isSpent(input.nullifierHash.toString(16).padStart(66, '0x00000'))
|
||||
isSpent.should.be.equal(false)
|
||||
|
||||
|
|
@ -164,13 +150,15 @@ contract('Mixer', accounts => {
|
|||
|
||||
const balanceMixerAfter = await token.balanceOf(mixer.address)
|
||||
const balanceRelayerAfter = await token.balanceOf(relayer)
|
||||
const balanceOperatorAfter = await token.balanceOf(operator)
|
||||
const ethBalanceOperatorAfter = await web3.eth.getBalance(operator)
|
||||
const balanceRecieverAfter = await token.balanceOf(toHex(receiver.toString()))
|
||||
const ethBalanceRecieverAfter = await web3.eth.getBalance(toHex(receiver.toString()))
|
||||
const feeBN = toBN(fee.toString())
|
||||
balanceMixerAfter.should.be.eq.BN(toBN(balanceMixerBefore).sub(toBN(value)))
|
||||
balanceMixerAfter.should.be.eq.BN(toBN(balanceMixerBefore).sub(toBN(tokenDenomination)))
|
||||
balanceRelayerAfter.should.be.eq.BN(toBN(balanceRelayerBefore))
|
||||
balanceOperatorAfter.should.be.eq.BN(toBN(balanceOperatorBefore).add(feeBN))
|
||||
balanceRecieverAfter.should.be.eq.BN(toBN(balanceRecieverBefore).add(toBN(value)).sub(feeBN))
|
||||
ethBalanceOperatorAfter.should.be.eq.BN(toBN(ethBalanceOperatorBefore).add(feeBN))
|
||||
balanceRecieverAfter.should.be.eq.BN(toBN(balanceRecieverBefore).add(toBN(tokenDenomination)))
|
||||
ethBalanceRecieverAfter.should.be.eq.BN(toBN(ethBalanceRecieverBefore).add(toBN(value)).sub(feeBN))
|
||||
|
||||
|
||||
logs[0].event.should.be.equal('Withdraw')
|
||||
|
|
|
|||
|
|
@ -9,7 +9,7 @@ const { toBN, toHex, randomHex } = require('web3-utils')
|
|||
const { takeSnapshot, revertSnapshot } = require('../lib/ganacheHelper')
|
||||
|
||||
const Mixer = artifacts.require('./ETHMixer.sol')
|
||||
const { AMOUNT, MERKLE_TREE_HEIGHT, EMPTY_ELEMENT } = process.env
|
||||
const { ETH_AMOUNT, MERKLE_TREE_HEIGHT, EMPTY_ELEMENT } = process.env
|
||||
|
||||
const websnarkUtils = require('websnark/src/utils')
|
||||
const buildGroth16 = require('websnark/src/groth16')
|
||||
|
|
@ -57,17 +57,17 @@ function snarkVerify(proof) {
|
|||
return snarkjs['groth'].isValid(verification_key, proof, proof.publicSignals)
|
||||
}
|
||||
|
||||
contract('Mixer', accounts => {
|
||||
contract('ETHMixer', accounts => {
|
||||
let mixer
|
||||
const sender = accounts[0]
|
||||
const operator = accounts[0]
|
||||
const levels = MERKLE_TREE_HEIGHT || 16
|
||||
const zeroValue = EMPTY_ELEMENT || 1337
|
||||
const value = AMOUNT || '1000000000000000000' // 1 ether
|
||||
const value = ETH_AMOUNT || '1000000000000000000' // 1 ether
|
||||
let snapshotId
|
||||
let prefix = 'test'
|
||||
let tree
|
||||
const fee = bigInt(AMOUNT).shr(1) || bigInt(1e17)
|
||||
const fee = bigInt(ETH_AMOUNT).shr(1) || bigInt(1e17)
|
||||
const receiver = getRandomReceiver()
|
||||
const relayer = accounts[1]
|
||||
let groth16
|
||||
|
|
@ -90,8 +90,8 @@ contract('Mixer', accounts => {
|
|||
|
||||
describe('#constructor', () => {
|
||||
it('should initialize', async () => {
|
||||
const transferValue = await mixer.transferValue()
|
||||
transferValue.should.be.eq.BN(toBN(value))
|
||||
const etherDenomination = await mixer.etherDenomination()
|
||||
etherDenomination.should.be.eq.BN(toBN(value))
|
||||
})
|
||||
})
|
||||
|
||||
|
|
|
|||
|
|
@ -12,7 +12,7 @@ const MiMC = artifacts.require('./MiMC.sol')
|
|||
const MerkleTree = require('../lib/MerkleTree')
|
||||
const MimcHasher = require('../lib/MiMC')
|
||||
|
||||
const { AMOUNT, MERKLE_TREE_HEIGHT, EMPTY_ELEMENT } = process.env
|
||||
const { ETH_AMOUNT, MERKLE_TREE_HEIGHT, EMPTY_ELEMENT } = process.env
|
||||
|
||||
// eslint-disable-next-line no-unused-vars
|
||||
function BNArrayToStringArray(array) {
|
||||
|
|
@ -30,7 +30,7 @@ contract('MerkleTreeWithHistory', accounts => {
|
|||
let zeroValue = EMPTY_ELEMENT || 1337
|
||||
const sender = accounts[0]
|
||||
// eslint-disable-next-line no-unused-vars
|
||||
const value = AMOUNT || '1000000000000000000'
|
||||
const value = ETH_AMOUNT || '1000000000000000000'
|
||||
let snapshotId
|
||||
let prefix = 'test'
|
||||
let tree
|
||||
|
|
|
|||
|
|
@ -77,7 +77,7 @@ module.exports = {
|
|||
// Configure your compilers
|
||||
compilers: {
|
||||
solc: {
|
||||
version: '0.5.10', // Fetch exact version from solc-bin (default: truffle's version)
|
||||
version: '0.5.11', // Fetch exact version from solc-bin (default: truffle's version)
|
||||
// docker: true, // Use "0.5.1" you've installed locally with docker (default: false)
|
||||
settings: { // See the solidity docs for advice about optimization and evmVersion
|
||||
optimizer: {
|
||||
|
|
|
|||
Loading…
Reference in New Issue