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cli.js
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#!/usr/bin/env node
// Works both in browser and node.js
require('dotenv').config();
const fs = require('fs');
const axios = require('axios');
const assert = require('assert');
const snarkjs = require('snarkjs');
const crypto = require('crypto');
const circomlib = require('circomlib');
const bigInt = snarkjs.bigInt;
const merkleTree = require('fixed-merkle-tree');
const Web3 = require('web3');
const Web3HttpProvider = require('web3-providers-http');
const buildGroth16 = require('websnark/src/groth16');
const websnarkUtils = require('websnark/src/utils');
const { toWei, fromWei, toBN, BN } = require('web3-utils');
const BigNumber = require('bignumber.js');
const config = require('./config');
const program = require('commander');
const { GasPriceOracle } = require('gas-price-oracle');
const SocksProxyAgent = require('socks-proxy-agent');
const is_ip_private = require('private-ip');
let web3, torPort, tornado, tornadoContract, tornadoInstance, circuit, proving_key, groth16, erc20, senderAccount, netId, netName, netSymbol, doNotSubmitTx, multiCall, privateRpc, subgraph;
let MERKLE_TREE_HEIGHT, ETH_AMOUNT, TOKEN_AMOUNT, PRIVATE_KEY;
/** Whether we are in a browser or node.js */
const inBrowser = typeof window !== 'undefined';
let isTestRPC = false;
/** Generate random number of specified byte length */
const rbigint = (nbytes) => snarkjs.bigInt.leBuff2int(crypto.randomBytes(nbytes));
/** Compute pedersen hash */
const pedersenHash = (data) => circomlib.babyJub.unpackPoint(circomlib.pedersenHash.hash(data))[0];
/** BigNumber to hex string of specified length */
function toHex(number, length = 32) {
const str = number instanceof Buffer ? number.toString('hex') : bigInt(number).toString(16);
return '0x' + str.padStart(length * 2, '0');
}
/** Remove Decimal without rounding with BigNumber */
function rmDecimalBN(bigNum, decimals = 6) {
return new BigNumber(bigNum).times(BigNumber(10).pow(decimals)).integerValue(BigNumber.ROUND_DOWN).div(BigNumber(10).pow(decimals)).toNumber();
}
/** Use MultiCall Contract */
async function useMultiCall(queryArray) {
const multiCallABI = require('./build/contracts/Multicall.abi.json');
const multiCallContract = new web3.eth.Contract(multiCallABI, multiCall);
const { returnData } = await multiCallContract.methods.aggregate(queryArray).call();
return returnData;
}
/** Display ETH account balance */
async function printETHBalance({ address, name }) {
const checkBalance = new BigNumber(await web3.eth.getBalance(address)).div(BigNumber(10).pow(18));
console.log(`${name} balance is`, rmDecimalBN(checkBalance), `${netSymbol}`);
}
/** Display ERC20 account balance */
async function printERC20Balance({ address, name, tokenAddress }) {
let tokenDecimals, tokenBalance, tokenName, tokenSymbol;
const erc20ContractJson = require('./build/contracts/ERC20Mock.json');
erc20 = tokenAddress ? new web3.eth.Contract(erc20ContractJson.abi, tokenAddress) : erc20;
if (!isTestRPC && !multiCall) {
const tokenCall = await useMultiCall([[tokenAddress, erc20.methods.balanceOf(address).encodeABI()], [tokenAddress, erc20.methods.decimals().encodeABI()], [tokenAddress, erc20.methods.name().encodeABI()], [tokenAddress, erc20.methods.symbol().encodeABI()]]);
tokenDecimals = parseInt(tokenCall[1]);
tokenBalance = new BigNumber(tokenCall[0]).div(BigNumber(10).pow(tokenDecimals));
tokenName = web3.eth.abi.decodeParameter('string', tokenCall[2]);
tokenSymbol = web3.eth.abi.decodeParameter('string', tokenCall[3]);
} else {
tokenDecimals = await erc20.methods.decimals().call();
tokenBalance = new BigNumber(await erc20.methods.balanceOf(address).call()).div(BigNumber(10).pow(tokenDecimals));
tokenName = await erc20.methods.name().call();
tokenSymbol = await erc20.methods.symbol().call();
}
console.log(`${name}`, tokenName, `Balance is`, rmDecimalBN(tokenBalance), tokenSymbol);
}
async function submitTransaction(signedTX) {
console.log("Submitting transaction to the remote node");
await web3.eth.sendSignedTransaction(signedTX)
.on('transactionHash', function (txHash) {
console.log(`View transaction on block explorer https://${getExplorerLink()}/tx/${txHash}`);
})
.on('error', function (e) {
console.error('on transactionHash error', e.message);
});
}
async function generateTransaction(to, encodedData, value = 0) {
const nonce = await web3.eth.getTransactionCount(senderAccount);
let gasPrice = await fetchGasPrice();
let gasLimit;
async function estimateGas() {
const fetchedGas = await web3.eth.estimateGas({
from : senderAccount,
to : to,
value : value,
nonce : nonce,
data : encodedData
});
const bumped = Math.floor(fetchedGas * 1.3);
return web3.utils.toHex(bumped);
}
if (encodedData) {
gasLimit = await estimateGas();
} else {
gasLimit = web3.utils.toHex(21000);
}
function txoptions() {
// Generate EIP-1559 transaction
if (netId == 1) {
return {
to : to,
value : value,
nonce : nonce,
maxFeePerGas : gasPrice,
maxPriorityFeePerGas : web3.utils.toHex(web3.utils.toWei('3', 'gwei')),
gas : gasLimit,
data : encodedData
}
} else if (netId == 5 || netId == 137 || netId == 43114) {
return {
to : to,
value : value,
nonce : nonce,
maxFeePerGas : gasPrice,
maxPriorityFeePerGas : gasPrice,
gas : gasLimit,
data : encodedData
}
} else {
return {
to : to,
value : value,
nonce : nonce,
gasPrice : gasPrice,
gas : gasLimit,
data : encodedData
}
}
}
const tx = txoptions();
const signed = await web3.eth.accounts.signTransaction(tx, PRIVATE_KEY);
if (!doNotSubmitTx) {
await submitTransaction(signed.rawTransaction);
} else {
console.log('\n=============Raw TX=================', '\n');
console.log(`Please submit this raw tx to https://${getExplorerLink()}/pushTx, or otherwise broadcast with node cli.js broadcast command.`, `\n`);
console.log(signed.rawTransaction, `\n`);
console.log('=====================================', '\n');
}
}
/**
* Create deposit object from secret and nullifier
*/
function createDeposit({ nullifier, secret }) {
const deposit = { nullifier, secret };
deposit.preimage = Buffer.concat([deposit.nullifier.leInt2Buff(31), deposit.secret.leInt2Buff(31)]);
deposit.commitment = pedersenHash(deposit.preimage);
deposit.commitmentHex = toHex(deposit.commitment);
deposit.nullifierHash = pedersenHash(deposit.nullifier.leInt2Buff(31));
deposit.nullifierHex = toHex(deposit.nullifierHash);
return deposit;
}
async function backupNote({ currency, amount, netId, note, noteString }) {
try {
await fs.writeFileSync(`./backup-tornado-${currency}-${amount}-${netId}-${note.slice(0, 10)}.txt`, noteString, 'utf8');
console.log("Backed up deposit note as", `./backup-tornado-${currency}-${amount}-${netId}-${note.slice(0, 10)}.txt`);
} catch (e) {
throw new Error('Writing backup note failed:', e);
}
}
async function backupInvoice({ currency, amount, netId, commitmentNote, invoiceString }) {
try {
await fs.writeFileSync(`./backup-tornadoInvoice-${currency}-${amount}-${netId}-${commitmentNote.slice(0, 10)}.txt`, invoiceString, 'utf8');
console.log("Backed up invoice as", `./backup-tornadoInvoice-${currency}-${amount}-${netId}-${commitmentNote.slice(0, 10)}.txt`)
} catch (e) {
throw new Error('Writing backup invoice failed:', e)
}
}
/**
* create a deposit invoice.
* @param currency Сurrency
* @param amount Deposit amount
*/
async function createInvoice({ currency, amount, chainId }) {
const deposit = createDeposit({
nullifier: rbigint(31),
secret: rbigint(31)
});
const note = toHex(deposit.preimage, 62);
const noteString = `tornado-${currency}-${amount}-${chainId}-${note}`;
console.log(`Your note: ${noteString}`);
const commitmentNote = toHex(deposit.commitment);
const invoiceString = `tornadoInvoice-${currency}-${amount}-${chainId}-${commitmentNote}`;
console.log(`Your invoice for deposit: ${invoiceString}`);
await backupNote({ currency, amount, netId: chainId, note, noteString });
await backupInvoice({ currency, amount, netId: chainId, commitmentNote, invoiceString });
return (noteString, invoiceString);
}
/**
* Make a deposit
* @param currency Сurrency
* @param amount Deposit amount
*/
async function deposit({ currency, amount, commitmentNote }) {
assert(senderAccount != null, 'Error! PRIVATE_KEY not found. Please provide PRIVATE_KEY in .env file if you deposit');
let commitment, noteString;
if (!commitmentNote) {
console.log("Creating new random deposit note");
const deposit = createDeposit({
nullifier: rbigint(31),
secret: rbigint(31)
});
const note = toHex(deposit.preimage, 62);
noteString = `tornado-${currency}-${amount}-${netId}-${note}`;
console.log(`Your note: ${noteString}`);
await backupNote({ currency, amount, netId, note, noteString });
commitment = toHex(deposit.commitment);
} else {
console.log("Using supplied invoice for deposit");
commitment = toHex(commitmentNote);
}
if (currency === netSymbol.toLowerCase()) {
await printETHBalance({ address: tornadoContract._address, name: 'Tornado contract' });
await printETHBalance({ address: senderAccount, name: 'Sender account' });
const value = isTestRPC ? ETH_AMOUNT : fromDecimals({ amount, decimals: 18 });
console.log('Submitting deposit transaction');
await generateTransaction(contractAddress, tornado.methods.deposit(tornadoInstance, commitment, []).encodeABI(), value);
await printETHBalance({ address: tornadoContract._address, name: 'Tornado contract' });
await printETHBalance({ address: senderAccount, name: 'Sender account' });
} else {
// a token
await printERC20Balance({ address: tornadoContract._address, name: 'Tornado contract' });
await printERC20Balance({ address: senderAccount, name: 'Sender account' });
const decimals = isTestRPC ? 18 : config.deployments[`netId${netId}`][currency].decimals;
const tokenAmount = isTestRPC ? TOKEN_AMOUNT : fromDecimals({ amount, decimals });
if (isTestRPC) {
console.log('Minting some test tokens to deposit');
await generateTransaction(erc20Address, erc20.methods.mint(senderAccount, tokenAmount).encodeABI());
}
const allowance = await erc20.methods.allowance(senderAccount, tornado._address).call({ from: senderAccount });
console.log('Current allowance is', fromWei(allowance));
if (toBN(allowance).lt(toBN(tokenAmount))) {
console.log('Approving tokens for deposit');
await generateTransaction(erc20Address, erc20.methods.approve(tornado._address, tokenAmount).encodeABI());
}
console.log('Submitting deposit transaction');
await generateTransaction(contractAddress, tornado.methods.deposit(tornadoInstance, commitment, []).encodeABI());
await printERC20Balance({ address: tornadoContract._address, name: 'Tornado contract' });
await printERC20Balance({ address: senderAccount, name: 'Sender account' });
}
if(!commitmentNote) {
return noteString;
}
}
/**
* Generate merkle tree for a deposit.
* Download deposit events from the tornado, reconstructs merkle tree, finds our deposit leaf
* in it and generates merkle proof
* @param deposit Deposit object
*/
async function generateMerkleProof(deposit, currency, amount) {
let leafIndex = -1;
// Get all deposit events from smart contract and assemble merkle tree from them
const cachedEvents = await fetchEvents({ type: 'deposit', currency, amount });
const leaves = cachedEvents
.sort((a, b) => a.leafIndex - b.leafIndex) // Sort events in chronological order
.map((e) => {
const index = toBN(e.leafIndex).toNumber();
if (toBN(e.commitment).eq(toBN(deposit.commitmentHex))) {
leafIndex = index;
}
return toBN(e.commitment).toString(10);
});
const tree = new merkleTree(MERKLE_TREE_HEIGHT, leaves);
// Validate that our data is correct
const root = tree.root();
let isValidRoot, isSpent;
if (!isTestRPC && !multiCall) {
const callContract = await useMultiCall([[tornadoContract._address, tornadoContract.methods.isKnownRoot(toHex(root)).encodeABI()], [tornadoContract._address, tornadoContract.methods.isSpent(toHex(deposit.nullifierHash)).encodeABI()]])
isValidRoot = web3.eth.abi.decodeParameter('bool', callContract[0]);
isSpent = web3.eth.abi.decodeParameter('bool', callContract[1]);
} else {
isValidRoot = await tornadoContract.methods.isKnownRoot(toHex(root)).call();
isSpent = await tornadoContract.methods.isSpent(toHex(deposit.nullifierHash)).call();
}
assert(isValidRoot === true, 'Merkle tree is corrupted');
assert(isSpent === false, 'The note is already spent');
assert(leafIndex >= 0, 'The deposit is not found in the tree');
// Compute merkle proof of our commitment
const { pathElements, pathIndices } = tree.path(leafIndex);
return { root, pathElements, pathIndices };
}
/**
* Generate SNARK proof for withdrawal
* @param deposit Deposit object
* @param recipient Funds recipient
* @param relayer Relayer address
* @param fee Relayer fee
* @param refund Receive ether for exchanged tokens
*/
async function generateProof({ deposit, currency, amount, recipient, relayerAddress = 0, fee = 0, refund = 0 }) {
// Compute merkle proof of our commitment
const { root, pathElements, pathIndices } = await generateMerkleProof(deposit, currency, amount);
// Prepare circuit input
const input = {
// Public snark inputs
root: root,
nullifierHash: deposit.nullifierHash,
recipient: bigInt(recipient),
relayer: bigInt(relayerAddress),
fee: bigInt(fee),
refund: bigInt(refund),
// Private snark inputs
nullifier: deposit.nullifier,
secret: deposit.secret,
pathElements: pathElements,
pathIndices: pathIndices
}
console.log('Generating SNARK proof');
console.time('Proof time');
const proofData = await websnarkUtils.genWitnessAndProve(groth16, input, circuit, proving_key);
const { proof } = websnarkUtils.toSolidityInput(proofData);
console.timeEnd('Proof time');
const args = [
toHex(input.root),
toHex(input.nullifierHash),
toHex(input.recipient, 20),
toHex(input.relayer, 20),
toHex(input.fee),
toHex(input.refund)
];
return { proof, args };
}
/**
* Do an ETH withdrawal
* @param noteString Note to withdraw
* @param recipient Recipient address
*/
async function withdraw({ deposit, currency, amount, recipient, relayerURL, refund = '0' }) {
let options = {};
if (currency === netSymbol.toLowerCase() && refund !== '0') {
throw new Error('The ETH purchase is supposted to be 0 for ETH withdrawals');
}
refund = toWei(refund);
if (relayerURL) {
if (relayerURL.endsWith('.eth')) {
throw new Error('ENS name resolving is not supported. Please provide DNS name of the relayer. See instuctions in README.md');
}
if (torPort) {
options = { httpsAgent: new SocksProxyAgent('socks5h://127.0.0.1:' + torPort), headers: { 'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; rv:91.0) Gecko/20100101 Firefox/91.0' } }
}
const relayerStatus = await axios.get(relayerURL + '/status', options);
const { rewardAccount, netId, ethPrices, tornadoServiceFee } = relayerStatus.data
assert(netId === (await web3.eth.net.getId()) || netId === '*', 'This relay is for different network');
console.log('Relay address:', rewardAccount);
const gasPrice = await fetchGasPrice();
const decimals = isTestRPC ? 18 : config.deployments[`netId${netId}`][currency].decimals
const fee = calculateFee({
currency,
gasPrice,
amount,
refund,
ethPrices,
relayerServiceFee: tornadoServiceFee,
decimals
});
if (fee.gt(fromDecimals({ amount, decimals }))) {
throw new Error('Too high refund');
};
const { proof, args } = await generateProof({ deposit, currency, amount, recipient, relayerAddress: rewardAccount, fee, refund });
console.log('Sending withdraw transaction through relay');
try {
const response = await axios.post(relayerURL + '/v1/tornadoWithdraw', {
contract: tornadoInstance,
proof,
args
}, options)
const { id } = response.data;
const result = await getStatus(id, relayerURL, options);
console.log('STATUS', result);
} catch (e) {
if (e.response) {
console.error(e.response.data.error);
} else {
console.error(e.message);
}
}
} else {
// using private key
// check if the address of recepient matches with the account of provided private key from environment to prevent accidental use of deposit address for withdrawal transaction.
assert(recipient.toLowerCase() == senderAccount.toLowerCase(), 'Withdrawal recepient mismatches with the account of provided private key from environment file');
const checkBalance = await web3.eth.getBalance(senderAccount);
assert(checkBalance !== 0, 'You have 0 balance, make sure to fund account by withdrawing from tornado using relayer first');
const { proof, args } = await generateProof({ deposit, currency, amount, recipient, refund });
console.log('Submitting withdraw transaction');
await generateTransaction(contractAddress, tornado.methods.withdraw(tornadoInstance, proof, ...args).encodeABI());
}
if (currency === netSymbol.toLowerCase()) {
await printETHBalance({ address: recipient, name: 'Recipient' });
} else {
await printERC20Balance({ address: recipient, name: 'Recipient' });
}
console.log('Done withdrawal from Tornado Cash');
}
/**
* Do an ETH / ERC20 send
* @param address Recepient address
* @param amount Amount to send
* @param tokenAddress ERC20 token address
*/
async function send({ address, amount, tokenAddress }) {
// using private key
assert(senderAccount != null, 'Error! PRIVATE_KEY not found. Please provide PRIVATE_KEY in .env file if you send');
if (tokenAddress) {
const erc20ContractJson = require('./build/contracts/ERC20Mock.json');
erc20 = new web3.eth.Contract(erc20ContractJson.abi, tokenAddress);
let tokenBalance, tokenDecimals, tokenSymbol;
if (!isTestRPC && !multiCall) {
const callToken = await useMultiCall([[tokenAddress, erc20.methods.balanceOf(senderAccount).encodeABI()], [tokenAddress, erc20.methods.decimals().encodeABI()], [tokenAddress, erc20.methods.symbol().encodeABI()]]);
tokenBalance = new BigNumber(callToken[0]);
tokenDecimals = parseInt(callToken[1]);
tokenSymbol = web3.eth.abi.decodeParameter('string', callToken[2]);
} else {
tokenBalance = new BigNumber(await erc20.methods.balanceOf(senderAccount).call());
tokenDecimals = await erc20.methods.decimals().call();
tokenSymbol = await erc20.methods.symbol().call();
}
const toSend = new BigNumber(amount).times(BigNumber(10).pow(tokenDecimals));
if (tokenBalance.lt(toSend)) {
console.error("You have", rmDecimalBN(tokenBalance.div(BigNumber(10).pow(tokenDecimals))), tokenSymbol, ", you can't send more than you have");
process.exit(1);
}
const encodeTransfer = erc20.methods.transfer(address, toSend).encodeABI();
await generateTransaction(tokenAddress, encodeTransfer);
console.log('Sent', amount, tokenSymbol, 'to', address);
} else {
const balance = new BigNumber(await web3.eth.getBalance(senderAccount));
assert(balance.toNumber() !== 0, "You have 0 balance, can't send transaction");
if (amount) {
toSend = new BigNumber(amount).times(BigNumber(10).pow(18));
if (balance.lt(toSend)) {
console.error("You have", rmDecimalBN(balance.div(BigNumber(10).pow(18))), netSymbol + ", you can't send more than you have.");
process.exit(1);
}
} else {
console.log('Amount not defined, sending all available amounts');
const gasPrice = new BigNumber(await fetchGasPrice());
const gasLimit = new BigNumber(21000);
if (netId == 1) {
const priorityFee = new BigNumber(await gasPrices(3));
toSend = balance.minus(gasLimit.times(gasPrice.plus(priorityFee)));
} else {
toSend = balance.minus(gasLimit.times(gasPrice));
}
}
await generateTransaction(address, null, toSend);
console.log('Sent', rmDecimalBN(toSend.div(BigNumber(10).pow(18))), netSymbol, 'to', address);
}
}
function getStatus(id, relayerURL, options) {
return new Promise((resolve) => {
async function getRelayerStatus() {
const responseStatus = await axios.get(relayerURL + '/v1/jobs/' + id, options);
if (responseStatus.status === 200) {
const { txHash, status, confirmations, failedReason } = responseStatus.data
console.log(`Current job status ${status}, confirmations: ${confirmations}`);
if (status === 'FAILED') {
throw new Error(status + ' failed reason:' + failedReason);
}
if (status === 'CONFIRMED') {
const receipt = await waitForTxReceipt({ txHash });
console.log(
`Transaction submitted through the relay. View transaction on block explorer https://${getExplorerLink()}/tx/${txHash}`
);
console.log('Transaction mined in block', receipt.blockNumber);
resolve(status);
}
}
setTimeout(() => {
getRelayerStatus(id, relayerURL);
}, 3000)
}
getRelayerStatus();
})
}
function capitalizeFirstLetter(string) {
return string.charAt(0).toUpperCase() + string.slice(1);
}
function fromDecimals({ amount, decimals }) {
amount = amount.toString();
let ether = amount.toString();
const base = new BN('10').pow(new BN(decimals));
const baseLength = base.toString(10).length - 1 || 1;
const negative = ether.substring(0, 1) === '-';
if (negative) {
ether = ether.substring(1);
}
if (ether === '.') {
throw new Error('[ethjs-unit] while converting number ' + amount + ' to wei, invalid value');
}
// Split it into a whole and fractional part
const comps = ether.split('.');
if (comps.length > 2) {
throw new Error('[ethjs-unit] while converting number ' + amount + ' to wei, too many decimal points');
}
let whole = comps[0];
let fraction = comps[1];
if (!whole) {
whole = '0';
}
if (!fraction) {
fraction = '0';
}
if (fraction.length > baseLength) {
throw new Error('[ethjs-unit] while converting number ' + amount + ' to wei, too many decimal places');
}
while (fraction.length < baseLength) {
fraction += '0';
}
whole = new BN(whole);
fraction = new BN(fraction);
let wei = whole.mul(base).add(fraction);
if (negative) {
wei = wei.mul(negative);
}
return new BN(wei.toString(10), 10);
}
function toDecimals(value, decimals, fixed) {
const zero = new BN(0);
const negative1 = new BN(-1);
decimals = decimals || 18;
fixed = fixed || 7;
value = new BN(value);
const negative = value.lt(zero);
const base = new BN('10').pow(new BN(decimals));
const baseLength = base.toString(10).length - 1 || 1;
if (negative) {
value = value.mul(negative1);
}
let fraction = value.mod(base).toString(10);
while (fraction.length < baseLength) {
fraction = `0${fraction}`;
}
fraction = fraction.match(/^([0-9]*[1-9]|0)(0*)/)[1];
const whole = value.div(base).toString(10);
value = `${whole}${fraction === '0' ? '' : `.${fraction}`}`;
if (negative) {
value = `-${value}`;
}
if (fixed) {
value = value.slice(0, fixed);
}
return value;
}
// List fetched from https://github.com/ethereum-lists/chains/blob/master/_data/chains
function getExplorerLink() {
switch (netId) {
case 56:
return 'bscscan.com';
case 100:
return 'blockscout.com/poa/xdai';
case 137:
return 'polygonscan.com';
case 42161:
return 'arbiscan.io';
case 43114:
return 'snowtrace.io';
case 5:
return 'goerli.etherscan.io';
case 42:
return 'kovan.etherscan.io';
case 10:
return 'optimistic.etherscan.io';
default:
return 'etherscan.io';
}
}
// List fetched from https://github.com/trustwallet/assets/tree/master/blockchains
function getCurrentNetworkName() {
switch (netId) {
case 1:
return 'Ethereum';
case 56:
return 'BinanceSmartChain';
case 100:
return 'GnosisChain';
case 137:
return 'Polygon';
case 42161:
return 'Arbitrum';
case 43114:
return 'Avalanche';
case 5:
return 'Goerli';
case 42:
return 'Kovan';
case 10:
return 'Optimism';
default:
return 'testRPC';
}
}
function getCurrentNetworkSymbol() {
switch (netId) {
case 56:
return 'BNB';
case 100:
return 'xDAI';
case 137:
return 'MATIC';
case 43114:
return 'AVAX';
default:
return 'ETH';
}
}
function gasPricesETH(value = 80) {
const tenPercent = (Number(value) * 5) / 100;
const max = Math.max(tenPercent, 3);
const bumped = Math.floor(Number(value) + max);
return toHex(toWei(bumped.toString(), 'gwei'));
}
function gasPrices(value = 5) {
return toHex(toWei(value.toString(), 'gwei'));
}
async function fetchGasPrice() {
try {
const options = {
chainId: netId
}
// Bump fees for Ethereum network
if (netId == 1) {
const oracle = new GasPriceOracle(options);
const gas = await oracle.gasPrices();
return gasPricesETH(gas.instant);
} else if (netId == 5 || isTestRPC) {
const web3GasPrice = await web3.eth.getGasPrice();
return web3GasPrice;
} else {
const oracle = new GasPriceOracle(options);
const gas = await oracle.gasPrices();
return gasPrices(gas.instant);
}
} catch (err) {
throw new Error(`Method fetchGasPrice has error ${err.message}`);
}
}
function calculateFee({ currency, gasPrice, amount, refund, ethPrices, relayerServiceFee, decimals }) {
const decimalsPoint =
Math.floor(relayerServiceFee) === Number(relayerServiceFee) ? 0 : relayerServiceFee.toString().split('.')[1].length;
const roundDecimal = 10 ** decimalsPoint;
const total = toBN(fromDecimals({ amount, decimals }));
const feePercent = total.mul(toBN(relayerServiceFee * roundDecimal)).div(toBN(roundDecimal * 100));
const expense = toBN(gasPrice).mul(toBN(5e5));
let desiredFee;
switch (currency) {
case netSymbol.toLowerCase(): {
desiredFee = expense.add(feePercent);
break;
}
default: {
desiredFee = expense
.add(toBN(refund))
.mul(toBN(10 ** decimals))
.div(toBN(ethPrices[currency]));
desiredFee = desiredFee.add(feePercent);
break;
}
}
return desiredFee;
}
/**
* Waits for transaction to be mined
* @param txHash Hash of transaction
* @param attempts
* @param delay
*/
function waitForTxReceipt({ txHash, attempts = 60, delay = 1000 }) {
return new Promise((resolve, reject) => {
const checkForTx = async (txHash, retryAttempt = 0) => {
const result = await web3.eth.getTransactionReceipt(txHash);
if (!result || !result.blockNumber) {
if (retryAttempt <= attempts) {
setTimeout(() => checkForTx(txHash, retryAttempt + 1), delay);
} else {
reject(new Error('tx was not mined'));
}
} else {
resolve(result);
}
}
checkForTx(txHash);
})
}
function initJson(file) {
return new Promise((resolve, reject) => {
fs.readFile(file, 'utf8', (error, data) => {
if (error) {
resolve([]);
}
try {
resolve(JSON.parse(data));
} catch (error) {
resolve([]);
}
});
});
};
function loadCachedEvents({ type, currency, amount }) {
try {
const module = require(`./cache/${netName.toLowerCase()}/${type}s_${currency}_${amount}.json`);
if (module) {
const events = module;
return {
events,
lastBlock: events[events.length - 1].blockNumber
}
}
} catch (err) {
console.log("Error fetching cached files, syncing from block", deployedBlockNumber);
return {
events: [],
lastBlock: deployedBlockNumber,
}
}
}
async function fetchEvents({ type, currency, amount }) {
if (type === "withdraw") {
type = "withdrawal";
}
const cachedEvents = loadCachedEvents({ type, currency, amount });
const startBlock = cachedEvents.lastBlock + 1;
console.log("Loaded cached",amount,currency.toUpperCase(),type,"events for",startBlock,"block");
console.log("Fetching",amount,currency.toUpperCase(),type,"events for",netName,"network");
async function syncEvents() {
try {
let targetBlock = await web3.eth.getBlockNumber();
let chunks = 1000;
console.log("Querying latest events from RPC");
for (let i = startBlock; i < targetBlock; i += chunks) {
let fetchedEvents = [];
function mapDepositEvents() {
fetchedEvents = fetchedEvents.map(({ blockNumber, transactionHash, returnValues }) => {
const { commitment, leafIndex, timestamp } = returnValues;
return {
blockNumber,
transactionHash,
commitment,
leafIndex: Number(leafIndex),
timestamp
}
});
}
function mapWithdrawEvents() {
fetchedEvents = fetchedEvents.map(({ blockNumber, transactionHash, returnValues }) => {
const { nullifierHash, to, fee } = returnValues;
return {
blockNumber,
transactionHash,
nullifierHash,
to,
fee
}
});
}
function mapLatestEvents() {
if (type === "deposit"){
mapDepositEvents();
} else {
mapWithdrawEvents();
}
}
async function fetchWeb3Events(i) {
let j;
if (i + chunks - 1 > targetBlock) {
j = targetBlock;
} else {
j = i + chunks - 1;
}
await tornadoContract.getPastEvents(capitalizeFirstLetter(type), {
fromBlock: i,
toBlock: j,
}).then(r => { fetchedEvents = fetchedEvents.concat(r); console.log("Fetched", amount, currency.toUpperCase(), type, "events to block:", j) }, err => { console.error(i + " failed fetching", type, "events from node", err); process.exit(1); }).catch(console.log);
if (type === "deposit"){
mapDepositEvents();
} else {
mapWithdrawEvents();
}
}
async function updateCache() {
try {
const fileName = `./cache/${netName.toLowerCase()}/${type}s_${currency}_${amount}.json`;
const localEvents = await initJson(fileName);
const events = localEvents.concat(fetchedEvents);
await fs.writeFileSync(fileName, JSON.stringify(events, null, 2), 'utf8');
} catch (error) {
throw new Error('Writing cache file failed:',error);
}
}
await fetchWeb3Events(i);
await updateCache();
}
} catch (error) {
throw new Error("Error while updating cache");
process.exit(1);
}
}
async function syncGraphEvents() {
let options = {};
if (torPort) {
options = { httpsAgent: new SocksProxyAgent('socks5h://127.0.0.1:' + torPort), headers: { 'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; rv:91.0) Gecko/20100101 Firefox/91.0' } };
}
async function queryLatestTimestamp() {
try {
const variables = {
currency: currency.toString(),
amount: amount.toString()
}
if (type === "deposit") {
const query = {
query: `
query($currency: String, $amount: String){
deposits(first: 1, orderBy: timestamp, orderDirection: desc, where: {currency: $currency, amount: $amount}) {
timestamp
}
}
`,
variables
}
const querySubgraph = await axios.post(subgraph, query, options);
const queryResult = querySubgraph.data.data.deposits;
const result = queryResult[0].timestamp;
return Number(result);
} else {
const query = {
query: `
query($currency: String, $amount: String){
withdrawals(first: 1, orderBy: timestamp, orderDirection: desc, where: {currency: $currency, amount: $amount}) {
timestamp
}
}
`,
variables
}
const querySubgraph = await axios.post(subgraph, query, options);
const queryResult = querySubgraph.data.data.withdrawals;
const result = queryResult[0].timestamp;
return Number(result);
}
} catch (error) {
console.error("Failed to fetch latest event from thegraph");
}
}
async function queryFromGraph(timestamp) {
try {
const variables = {
currency: currency.toString(),
amount: amount.toString(),
timestamp: timestamp
}
if (type === "deposit") {
const query = {
query: `
query($currency: String, $amount: String, $timestamp: Int){
deposits(orderBy: timestamp, first: 1000, where: {currency: $currency, amount: $amount, timestamp_gt: $timestamp}) {
blockNumber
transactionHash
commitment
index
timestamp
}
}
`,
variables
}
const querySubgraph = await axios.post(subgraph, query, options);
const queryResult = querySubgraph.data.data.deposits;
const mapResult = queryResult.map(({ blockNumber, transactionHash, commitment, index, timestamp }) => {
return {
blockNumber: Number(blockNumber),
transactionHash,
commitment,
leafIndex: Number(index),
timestamp
}
});
return mapResult;
} else {
const query = {
query: `
query($currency: String, $amount: String, $timestamp: Int){
withdrawals(orderBy: timestamp, first: 1000, where: {currency: $currency, amount: $amount, timestamp_gt: $timestamp}) {
blockNumber
transactionHash
nullifier
to
fee
}
}
`,
variables
}
const querySubgraph = await axios.post(subgraph, query, options);
const queryResult = querySubgraph.data.data.withdrawals;