tornado-cli/cli.js

#!/usr/bin/env NODE_OPTIONS=--no-warnings node
// Temporary demo client
// 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('./lib/MerkleTree')
const Web3 = require('web3')
const buildGroth16 = require('websnark/src/groth16')
const websnarkUtils = require('websnark/src/utils')
const { toWei, fromWei, toBN, BN } = require('web3-utils')
const config = require('./config')
const program = require('commander')

let web3, tornado, circuit, proving_key, groth16, erc20, senderAccount, netId
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 isLocalRPC = false
const networks = { '1': 'mainnet', '42': 'kovan' }

/** 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')
}

/** Display ETH account balance */
async function printETHBalance({ address, name }) {
    console.log(`${name} ETH balance is`, web3.utils.fromWei(await web3.eth.getBalance(address)))
}

/** Display ERC20 account balance */
async function printERC20Balance({ address, name, tokenAddress }) {
    const erc20ContractJson = require('./build/contracts/ERC20Mock.json')
    erc20 = tokenAddress ? new web3.eth.Contract(erc20ContractJson.abi, tokenAddress) : erc20
    console.log(`${name} Token Balance is`, web3.utils.fromWei(await erc20.methods.balanceOf(address).call()))
}

/**
 * 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
}

/**
 * Make a deposit
 * @param currency Сurrency
 * @param amount Deposit amount
 */
async function deposit({ currency, amount }) {
    const deposit = createDeposit({ nullifier: rbigint(31), secret: rbigint(31) })
    const note = toHex(deposit.preimage, 62)
    const noteString = `tornado-${currency}-${amount}-${netId}-${note}`
    console.log(`Your note: ${noteString}`)
    if (currency === 'eth') {
        await printETHBalance({ address: tornado._address, name: 'Tornado' })
        await printETHBalance({ address: senderAccount, name: 'Sender account' })
        const value = isLocalRPC ? ETH_AMOUNT : fromDecimals({ amount, decimals: 18 })
        console.log('Submitting deposit transaction')
        await tornado.methods.deposit(toHex(deposit.commitment)).send({ value, from: senderAccount, gas: 2e6 })
        await printETHBalance({ address: tornado._address, name: 'Tornado' })
        await printETHBalance({ address: senderAccount, name: 'Sender account' })
    } else { // a token
        await printERC20Balance({ address: tornado._address, name: 'Tornado' })
        await printERC20Balance({ address: senderAccount, name: 'Sender account' })
        const decimals = isLocalRPC ? 18 : config.deployments[`netId${netId}`][currency].decimals
        const tokenAmount = isLocalRPC ? TOKEN_AMOUNT : fromDecimals({ amount, decimals })
        if (isLocalRPC) {
            console.log('Minting some test tokens to deposit')
            await erc20.methods.mint(senderAccount, tokenAmount).send({ from: senderAccount, gas: 2e6 })
        }

        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 erc20.methods.approve(tornado._address, tokenAmount).send({ from: senderAccount, gas: 1e6 })
        }

        console.log('Submitting deposit transaction')
        await tornado.methods.deposit(toHex(deposit.commitment)).send({ from: senderAccount, gas: 2e6 })
        await printERC20Balance({ address: tornado._address, name: 'Tornado' })
        await printERC20Balance({ address: senderAccount, name: 'Sender account' })
    }

    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) {
    // Get all deposit events from smart contract and assemble merkle tree from them
    console.log('Getting current state from tornado contract')
    const events = await tornado.getPastEvents('Deposit', { fromBlock: 0, toBlock: 'latest' })
    const leaves = events
        .sort((a, b) => a.returnValues.leafIndex - b.returnValues.leafIndex) // Sort events in chronological order
        .map(e => e.returnValues.commitment)
    const tree = new merkleTree(MERKLE_TREE_HEIGHT, leaves)

    // Find current commitment in the tree
    const depositEvent = events.find(e => e.returnValues.commitment === toHex(deposit.commitment))
    const leafIndex = depositEvent ? depositEvent.returnValues.leafIndex : -1

    // Validate that our data is correct
    const root = await tree.root()
    const isValidRoot = await tornado.methods.isKnownRoot(toHex(root)).call()
    const isSpent = await tornado.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
    return tree.path(leafIndex)
}

/**
 * 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, recipient, relayerAddress = 0, fee = 0, refund = 0 }) {
    // Compute merkle proof of our commitment
    const { root, path_elements, path_index } = await generateMerkleProof(deposit)

    // 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: path_elements,
        pathIndices: path_index,
    }

    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' }) {
    if (currency === 'eth' && 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')
        }
        const relayerStatus = await axios.get(relayerURL + '/status')
        const { relayerAddress, netId, gasPrices, ethPrices, relayerServiceFee } = relayerStatus.data
        assert(netId === await web3.eth.net.getId() || netId === '*', 'This relay is for different network')
        console.log('Relay address: ', relayerAddress)

        const decimals = isLocalRPC ? 18 : config.deployments[`netId${netId}`][currency].decimals
        const fee = calculateFee({ gasPrices, currency, amount, refund, ethPrices, relayerServiceFee, decimals })
        if (fee.gt(fromDecimals({ amount, decimals }))) {
            throw new Error('Too high refund')
        }
        const { proof, args } = await generateProof({ deposit, recipient, relayerAddress, fee, refund })

        console.log('Sending withdraw transaction through relay')
        try {
            const relay = await axios.post(relayerURL + '/relay', { contract: tornado._address, proof, args })
            if (netId === 1 || netId === 42) {
                console.log(`Transaction submitted through the relay. View transaction on etherscan https://${getCurrentNetworkName()}etherscan.io/tx/${relay.data.txHash}`)
            } else {
                console.log(`Transaction submitted through the relay. The transaction hash is ${relay.data.txHash}`)
            }

            const receipt = await waitForTxReceipt({ txHash: relay.data.txHash })
            console.log('Transaction mined in block', receipt.blockNumber)
        } catch (e) {
            if (e.response) {
                console.error(e.response.data.error)
            } else {
                console.error(e.message)
            }
        }
    } else { // using private key
        const { proof, args } = await generateProof({ deposit, recipient, refund })

        console.log('Submitting withdraw transaction')
        await tornado.methods.withdraw(proof, ...args).send({ from: senderAccount, value: refund.toString(), gas: 1e6 })
            .on('transactionHash', function (txHash) {
                if (netId === 1 || netId === 42) {
                    console.log(`View transaction on etherscan https://${getCurrentNetworkName()}etherscan.io/tx/${txHash}`)
                } else {
                    console.log(`The transaction hash is ${txHash}`)
                }
            }).on('error', function (e) {
                console.error('on transactionHash error', e.message)
            })
    }
    console.log('Done')
}

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
}

function getCurrentNetworkName() {
    switch (netId) {
        case 1:
            return ''
        case 42:
            return 'kovan.'
    }

}

function calculateFee({ gasPrices, currency, amount, refund, ethPrices, relayerServiceFee, decimals }) {

    const total = toBN(fromDecimals({ amount, decimals }))
    const fee = relayerServiceFee
    const decimalsPoint = Math.floor(fee) === fee ? 0 : fee.toString().split('.')[1].length
    const roundDecimal = 10 ** decimalsPoint
    relayerServiceFee = total.mul(toBN(fee * roundDecimal)).div(toBN(roundDecimal * 100))
    const ethFee = toBN(toWei(gasPrices.fast.toString(), 'gwei')).mul(toBN('500000'))

    switch (currency) {
        case 'eth': {
            return ethFee.add(relayerServiceFee)
        }
        default: {
            const tokenFee = ethFee
                .mul(toBN(10 ** decimals))
                .div(toBN(ethPrices[currency]))
            return tokenFee.add(relayerServiceFee)
        }
    }
}

/**
 * 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)
    })
}

/**
 * Parses Tornado.cash note
 * @param noteString the note
 */
function parseNote(noteString) {
    const noteRegex = /tornado-(?<currency>\w+)-(?<amount>[\d.]+)-(?<netId>\d+)-0x(?<note>[0-9a-fA-F]{124})/g
    const match = noteRegex.exec(noteString)
    if (!match) {
        throw new Error('The note has invalid format')
    }

    const buf = Buffer.from(match.groups.note, 'hex')
    const nullifier = bigInt.leBuff2int(buf.slice(0, 31))
    const secret = bigInt.leBuff2int(buf.slice(31, 62))
    const deposit = createDeposit({ nullifier, secret })
    const netId = Number(match.groups.netId)

    return { currency: match.groups.currency, amount: match.groups.amount, netId, deposit }
}

async function loadDepositData({ deposit }) {
    try {
        const eventWhenHappened = await tornado.getPastEvents('Deposit', {
            filter: {
                commitment: deposit.commitmentHex
            },
            fromBlock: 0,
            toBlock: 'latest'
        })
        if (eventWhenHappened.length === 0) {
            throw new Error('There is no related deposit, the note is invalid')
        }

        const { timestamp } = eventWhenHappened[0].returnValues
        const txHash = eventWhenHappened[0].transactionHash
        const isSpent = await tornado.methods.isSpent(deposit.nullifierHex).call()
        const receipt = await web3.eth.getTransactionReceipt(txHash)

        return { timestamp, txHash, isSpent, from: receipt.from, commitment: deposit.commitmentHex }
    } catch (e) {
        console.error('loadDepositData', e)
    }
    return {}
}
async function loadWithdrawalData({ amount, currency, deposit }) {
    try {
        const events = await await tornado.getPastEvents('Withdrawal', {
            fromBlock: 0,
            toBlock: 'latest'
        })

        const withdrawEvent = events.filter((event) => {
            return event.returnValues.nullifierHash === deposit.nullifierHex
        })[0]

        const fee = withdrawEvent.returnValues.fee
        const decimals = config.deployments[`netId${netId}`][currency].decimals
        const withdrawalAmount = toBN(fromDecimals({ amount, decimals })).sub(
            toBN(fee)
        )
        const { timestamp } = await web3.eth.getBlock(withdrawEvent.blockHash)
        return {
            amount: toDecimals(withdrawalAmount, decimals, 9),
            txHash: withdrawEvent.transactionHash,
            to: withdrawEvent.returnValues.to,
            timestamp,
            nullifier: deposit.nullifierHex,
            fee: toDecimals(fee, decimals, 9)
        }
    } catch (e) {
        console.error('loadWithdrawalData', e)
    }
}

/**
 * Init web3, contracts, and snark
 */
async function init({ rpc, noteNetId, currency = 'dai', amount = '100' }) {
    let contractJson, erc20ContractJson, erc20tornadoJson, tornadoAddress, tokenAddress
    // TODO do we need this? should it work in browser really?
    if (inBrowser) {
        // Initialize using injected web3 (Metamask)
        // To assemble web version run `npm run browserify`
        web3 = new Web3(window.web3.currentProvider, null, { transactionConfirmationBlocks: 1 })
        contractJson = await (await fetch('build/contracts/ETHTornado.json')).json()
        circuit = await (await fetch('build/circuits/withdraw.json')).json()
        proving_key = await (await fetch('build/circuits/withdraw_proving_key.bin')).arrayBuffer()
        MERKLE_TREE_HEIGHT = 20
        ETH_AMOUNT = 1e18
        TOKEN_AMOUNT = 1e19
        senderAccount = (await web3.eth.getAccounts())[0]
    } 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
        MERKLE_TREE_HEIGHT = process.env.MERKLE_TREE_HEIGHT || 20
        ETH_AMOUNT = process.env.ETH_AMOUNT
        TOKEN_AMOUNT = process.env.TOKEN_AMOUNT
        PRIVATE_KEY = process.env.PRIVATE_KEY
        if (PRIVATE_KEY) {
            const account = web3.eth.accounts.privateKeyToAccount('0x' + PRIVATE_KEY)
            web3.eth.accounts.wallet.add('0x' + PRIVATE_KEY)
            web3.eth.defaultAccount = account.address
            senderAccount = account.address
        } 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')
    }
    // 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()
    netId = await web3.eth.net.getId()
    if (noteNetId && Number(noteNetId) !== netId) {
        throw new Error('This note is for a different network. Specify the --rpc option explicitly')
    }
    isLocalRPC = netId > 42

    if (isLocalRPC) {
        tornadoAddress = currency === 'eth' ? contractJson.networks[netId].address : erc20tornadoJson.networks[netId].address
        tokenAddress = currency !== 'eth' ? erc20ContractJson.networks[netId].address : null
        senderAccount = (await web3.eth.getAccounts())[0]
    } else {
        try {
            tornadoAddress = config.deployments[`netId${netId}`][currency].instanceAddress[amount]
            if (!tornadoAddress) {
                throw new Error()
            }
            tokenAddress = config.deployments[`netId${netId}`][currency].tokenAddress
        } catch (e) {
            console.error('There is no such tornado instance, check the currency and amount you provide')
            process.exit(1)
        }
    }
    tornado = new web3.eth.Contract(contractJson.abi, tornadoAddress)
    erc20 = currency !== 'eth' ? new web3.eth.Contract(erc20ContractJson.abi, tokenAddress) : {}
}

async function main() {
    if (inBrowser) {
        const instance = { currency: 'eth', amount: '0.1' }
        await init(instance)
        window.deposit = async () => {
            await deposit(instance)
        }
        window.withdraw = async () => {
            const noteString = prompt('Enter the note to withdraw')
            const recipient = (await web3.eth.getAccounts())[0]

            const { currency, amount, netId, deposit } = parseNote(noteString)
            await init({ noteNetId: netId, currency, amount })
            await withdraw({ deposit, currency, amount, recipient })
        }
    } else {
        program
            .option('-r, --rpc <URL>', 'The RPC, CLI should interact with', 'http://localhost:8545')
            .option('-R, --relayer <URL>', 'Withdraw via relayer')
        program
            .command('deposit <currency> <amount>')
            .description('Submit a deposit of specified currency and amount from default eth account and return the resulting note. The currency is one of (ETH|DAI|cDAI|USDC|cUSDC|USDT). The amount depends on currency, see config.js file or visit https://tornado.cash.')
            .action(async (currency, amount) => {
                currency = currency.toLowerCase()
                await init({ rpc: program.rpc, currency, amount })
                await deposit({ currency, amount })
            })
        program
            .command('withdraw <note> <recipient> [ETH_purchase]')
            .description('Withdraw a note to a recipient account using relayer or specified private key. You can exchange some of your deposit`s tokens to ETH during the withdrawal by specifing ETH_purchase (e.g. 0.01) to pay for gas in future transactions. Also see the --relayer option.')
            .action(async (noteString, recipient, refund) => {
                const { currency, amount, netId, deposit } = parseNote(noteString)
                await init({ rpc: program.rpc, noteNetId: netId, currency, amount })
                await withdraw({ deposit, currency, amount, recipient, refund, relayerURL: program.relayer })
            })
        program
            .command('balance <address> [token_address]')
            .description('Check ETH and ERC20 balance')
            .action(async (address, tokenAddress) => {
                await init({ rpc: program.rpc })
                await printETHBalance({ address, name: '' })
                if (tokenAddress) {
                    await printERC20Balance({ address, name: '', tokenAddress })
                }
            })
        program
            .command('compliance <note>')
            .description('Shows the deposit and withdrawal of the provided note. This might be necessary to show the origin of assets held in your withdrawal address.')
            .action(async (noteString) => {
                const { currency, amount, netId, deposit } = parseNote(noteString)
                await init({ rpc: program.rpc, noteNetId: netId, currency, amount })
                const depositInfo = await loadDepositData({ deposit })
                const depositDate = new Date(depositInfo.timestamp * 1000)
                console.log('\n=============Deposit=================')
                console.log('Deposit     :', amount, currency)
                console.log('Date        :', depositDate.toLocaleDateString(), depositDate.toLocaleTimeString())
                console.log('From        :', `https://${getCurrentNetworkName()}etherscan.io/address/${depositInfo.from}`)
                console.log('Transaction :', `https://${getCurrentNetworkName()}etherscan.io/tx/${depositInfo.txHash}`)
                console.log('Commitment  :', depositInfo.commitment)
                if (deposit.isSpent) {
                    console.log('The note was not spent')
                }

                const withdrawInfo = await loadWithdrawalData({ amount, currency, deposit })
                const withdrawalDate = new Date(withdrawInfo.timestamp * 1000)
                console.log('\n=============Withdrawal==============')
                console.log('Withdrawal  :', withdrawInfo.amount, currency)
                console.log('Relayer Fee :', withdrawInfo.fee, currency)
                console.log('Date        :', withdrawalDate.toLocaleDateString(), withdrawalDate.toLocaleTimeString())
                console.log('To          :', `https://${getCurrentNetworkName()}etherscan.io/address/${withdrawInfo.to}`)
                console.log('Transaction :', `https://${getCurrentNetworkName()}etherscan.io/tx/${withdrawInfo.txHash}`)
                console.log('Nullifier   :', withdrawInfo.nullifier)
            })
        program
            .command('test')
            .description('Perform an automated test. It deposits and withdraws one ETH and one ERC20 note. Uses ganache.')
            .action(async () => {
                console.log('Start performing ETH deposit-withdraw test')
                let currency = 'eth'
                let amount = '0.1'
                await init({ rpc: program.rpc, currency, amount })
                let noteString = await deposit({ currency, amount })
                let parsedNote = parseNote(noteString)
                await withdraw({ deposit: parsedNote.deposit, currency, amount, recipient: senderAccount, relayerURL: program.relayer })

                console.log('\nStart performing DAI deposit-withdraw test')
                currency = 'dai'
                amount = '100'
                await init({ rpc: program.rpc, currency, amount })
                noteString = await deposit({ currency, amount })
                    ; (parsedNote = parseNote(noteString))
                await withdraw({ deposit: parsedNote.deposit, currency, amount, recipient: senderAccount, refund: '0.02', relayerURL: program.relayer })
            })
        try {
            await program.parseAsync(process.argv)
            process.exit(0)
        } catch (e) {
            console.log('Error:', e)
            process.exit(1)
        }
    }
}

main()