sandwich-flashbots-tutorial.js

// This is a basic uniswap frontrunning MEV bot
// Made by Merunas follow me on youtube to see how to use it and edit it: https://www.youtube.com/channel/UCJInIwgW1duAEnMHHxDK7XQ

// 1. Setup ethers, required variables, contracts and start function
const { Wallet, ethers } = require('ethers')
const { FlashbotsBundleProvider, FlashbotsBundleResolution } = require('@flashbots/ethers-provider-bundle')

// 1.1 Setup ABIs and Bytecodes
const UniswapAbi = [{"inputs":[{"internalType":"address","name":"_factory","type":"address"},{"internalType":"address","name":"_WETH","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"WETH","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"tokenA","type":"address"},{"internalType":"address","name":"tokenB","type":"address"},{"internalType":"uint256","name":"amountADesired","type":"uint256"},{"internalType":"uint256","name":"amountBDesired","type":"uint256"},{"internalType":"uint256","name":"amountAMin","type":"uint256"},{"internalType":"uint256","name":"amountBMin","type":"uint256"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"deadline","type":"uint256"}],"name":"addLiquidity","outputs":[{"internalType":"uint256","name":"amountA","type":"uint256"},{"internalType":"uint256","name":"amountB","type":"uint256"},{"internalType":"uint256","name":"liquidity","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"},{"internalType":"uint256","name":"amountTokenDesired","type":"uint256"},{"internalType":"uint256","name":"amountTokenMin","type":"uint256"},{"internalType":"uint256","name":"amountETHMin","type":"uint256"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"deadline","type":"uint256"}],"name":"addLiquidityETH","outputs":[{"internalType":"uint256","name":"amountToken","type":"uint256"},{"internalType":"uint256","name":"amountETH","type":"uint256"},{"internalType":"uint256","name":"liquidity","type":"uint256"}],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"factory","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"amountOut","type":"uint256"},{"internalType":"uint256","name":"reserveIn","type":"uint256"},{"internalType":"uint256","name":"reserveOut","type":"uint256"}],"name":"getAmountIn","outputs":[{"internalType":"uint256","name":"amountIn","type":"uint256"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"uint256","name":"amountIn","type":"uint256"},{"internalType":"uint256","name":"reserveIn","type":"uint256"},{"internalType":"uint256","name":"reserveOut","type":"uint256"}],"name":"getAmountOut","outputs":[{"internalType":"uint256","name":"amountOut","type":"uint256"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"uint256","name":"amountOut","type":"uint256"},{"internalType":"address[]","name":"path","type":"address[]"}],"name":"getAmountsIn","outputs":[{"internalType":"uint256[]","name":"amounts","type":"uint256[]"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"amountIn","type":"uint256"},{"internalType":"address[]","name":"path","type":"address[]"}],"name":"getAmountsOut","outputs":[{"internalType":"uint256[]","name":"amounts","type":"uint256[]"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"amountA","type":"uint256"},{"internalType":"uint256","name":"reserveA","type":"uint256"},{"internalType":"uint256","name":"reserveB","type":"uint256"}],"name":"quote","outputs":[{"internalType":"uint256","name":"amountB","type":"uint256"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"address","name":"tokenA","type":"address"},{"internalType":"address","name":"tokenB","type":"address"},{"internalType":"uint256","name":"liquidity","type":"uint256"},{"internalType":"uint256","name":"amountAMin","type":"uint256"},{"internalType":"uint256","name":"amountBMin","type":"uint256"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"deadline","type":"uint256"}],"name":"removeLiquidity","outputs":[{"internalType":"uint256","name":"amountA","type":"uint256"},{"internalType":"uint256","name":"amountB","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"},{"internalType":"uint256","name":"liquidity","type":"uint256"},{"internalType":"uint256","name":"amountTokenMin","type":"uint256"},{"internalType":"uint256","name":"amountETHMin","type":"uint256"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"deadline","type":"uint256"}],"name":"removeLiquidityETH","outputs":[{"internalType":"uint256","name":"amountToken","type":"uint256"},{"internalType":"uint256","name":"amountETH","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"},{"internalType":"uint256","name":"liquidity","type":"uint256"},{"internalType":"uint256","name":"amountTokenMin","type":"uint256"},{"internalType":"uint256","name":"amountETHMin","type":"uint256"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"deadline","type":"uint256"}],"name":"removeLiquidityETHSupportingFeeOnTransferTokens","outputs":[{"internalType":"uint256","name":"amountETH","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"},{"internalType":"uint256","name":"liquidity","type":"uint256"},{"internalType":"uint256","name":"amountTokenMin","type":"uint256"},{"internalType":"uint256","name":"amountETHMin","type":"uint256"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"bool","name":"approveMax","type":"bool"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"name":"removeLiquidityETHWithPermit","outputs":[{"internalType":"uint256","name":"amountToken","type":"uint256"},{"internalType":"uint256","name":"amountETH","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"},{"internalType":"uint256","name":"liquidity","type":"uint256"},{"internalType":"uint256","name":"amountTokenMin","type":"uint256"},{"internalType":"uint256","name":"amountETHMin","type":"uint256"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"bool","name":"approveMax","type":"bool"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"name":"removeLiquidityETHWithPermitSupportingFeeOnTransferTokens","outputs":[{"internalType":"uint256","name":"amountETH","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"tokenA","type":"address"},{"internalType":"address","name":"tokenB","type":"address"},{"internalType":"uint256","name":"liquidity","type":"uint256"},{"internalType":"uint256","name":"amountAMin","type":"uint256"},{"internalType":"uint256","name":"amountBMin","type":"uint256"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"bool","name":"approveMax","type":"bool"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"name":"removeLiquidityWithPermit","outputs":[{"internalType":"uint256","name":"amountA","type":"uint256"},{"internalType":"uint256","name":"amountB","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amountOut","type":"uint256"},{"internalType":"address[]","name":"path","type":"address[]"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"deadline","type":"uint256"}],"name":"swapETHForExactTokens","outputs":[{"internalType":"uint256[]","name":"amounts","type":"uint256[]"}],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amountOutMin","type":"uint256"},{"internalType":"address[]","name":"path","type":"address[]"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"deadline","type":"uint256"}],"name":"swapExactETHForTokens","outputs":[{"internalType":"uint256[]","name":"amounts","type":"uint256[]"}],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amountOutMin","type":"uint256"},{"internalType":"address[]","name":"path","type":"address[]"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"deadline","type":"uint256"}],"name":"swapExactETHForTokensSupportingFeeOnTransferTokens","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amountIn","type":"uint256"},{"internalType":"uint256","name":"amountOutMin","type":"uint256"},{"internalType":"address[]","name":"path","type":"address[]"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"deadline","type":"uint256"}],"name":"swapExactTokensForETH","outputs":[{"internalType":"uint256[]","name":"amounts","type":"uint256[]"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amountIn","type":"uint256"},{"internalType":"uint256","name":"amountOutMin","type":"uint256"},{"internalType":"address[]","name":"path","type":"address[]"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"deadline","type":"uint256"}],"name":"swapExactTokensForETHSupportingFeeOnTransferTokens","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amountIn","type":"uint256"},{"internalType":"uint256","name":"amountOutMin","type":"uint256"},{"internalType":"address[]","name":"path","type":"address[]"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"deadline","type":"uint256"}],"name":"swapExactTokensForTokens","outputs":[{"internalType":"uint256[]","name":"amounts","type":"uint256[]"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amountIn","type":"uint256"},{"internalType":"uint256","name":"amountOutMin","type":"uint256"},{"internalType":"address[]","name":"path","type":"address[]"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"deadline","type":"uint256"}],"name":"swapExactTokensForTokensSupportingFeeOnTransferTokens","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amountOut","type":"uint256"},{"internalType":"uint256","name":"amountInMax","type":"uint256"},{"internalType":"address[]","name":"path","type":"address[]"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"deadline","type":"uint256"}],"name":"swapTokensForExactETH","outputs":[{"internalType":"uint256[]","name":"amounts","type":"uint256[]"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amountOut","type":"uint256"},{"internalType":"uint256","name":"amountInMax","type":"uint256"},{"internalType":"address[]","name":"path","type":"address[]"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"deadline","type":"uint256"}],"name":"swapTokensForExactTokens","outputs":[{"internalType":"uint256[]","name":"amounts","type":"uint256[]"}],"stateMutability":"nonpayable","type":"function"},{"stateMutability":"payable","type":"receive"}]
const UniswapBytecode = 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const UniswapFactoryAbi = [{"inputs":[],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"token0","type":"address"},{"indexed":true,"internalType":"address","name":"token1","type":"address"},{"indexed":false,"internalType":"address","name":"pair","type":"address"},{"indexed":false,"internalType":"uint256","name":"","type":"uint256"}],"name":"PairCreated","type":"event"},{"constant":true,"inputs":[],"name":"INIT_CODE_HASH","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"allPairs","outputs":[{"internalType":"address","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"allPairsLength","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"tokenA","type":"address"},{"internalType":"address","name":"tokenB","type":"address"}],"name":"createPair","outputs":[{"internalType":"address","name":"pair","type":"address"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"feeTo","outputs":[{"internalType":"address","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"feeToSetter","outputs":[{"internalType":"address","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"address","name":"","type":"address"}],"name":"getPair","outputs":[{"internalType":"address","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"_feeTo","type":"address"}],"name":"setFeeTo","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"_feeToSetter","type":"address"}],"name":"setFeeToSetter","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"}]
const UniswapFactoryBytecode = 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const pairAbi = 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const pairBytecode = 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const erc20Abi = [{"constant":true,"inputs":[],"name":"name","outputs":[{"name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"guy","type":"address"},{"name":"wad","type":"uint256"}],"name":"approve","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"totalSupply","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"src","type":"address"},{"name":"dst","type":"address"},{"name":"wad","type":"uint256"}],"name":"transferFrom","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"wad","type":"uint256"}],"name":"withdraw","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"decimals","outputs":[{"name":"","type":"uint8"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"name":"","type":"address"}],"name":"balanceOf","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"symbol","outputs":[{"name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"dst","type":"address"},{"name":"wad","type":"uint256"}],"name":"transfer","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[],"name":"deposit","outputs":[],"payable":true,"stateMutability":"payable","type":"function"},{"constant":true,"inputs":[{"name":"","type":"address"},{"name":"","type":"address"}],"name":"allowance","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"payable":true,"stateMutability":"payable","type":"fallback"},{"anonymous":false,"inputs":[{"indexed":true,"name":"src","type":"address"},{"indexed":true,"name":"guy","type":"address"},{"indexed":false,"name":"wad","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"src","type":"address"},{"indexed":true,"name":"dst","type":"address"},{"indexed":false,"name":"wad","type":"uint256"}],"name":"Transfer","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"dst","type":"address"},{"indexed":false,"name":"wad","type":"uint256"}],"name":"Deposit","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"src","type":"address"},{"indexed":false,"name":"wad","type":"uint256"}],"name":"Withdrawal","type":"event"}]
const erc20Bytecode = '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'
const uniswapV3Abi = [{"inputs":[{"components":[{"internalType":"address","name":"permit2","type":"address"},{"internalType":"address","name":"weth9","type":"address"},{"internalType":"address","name":"seaport","type":"address"},{"internalType":"address","name":"nftxZap","type":"address"},{"internalType":"address","name":"x2y2","type":"address"},{"internalType":"address","name":"foundation","type":"address"},{"internalType":"address","name":"sudoswap","type":"address"},{"internalType":"address","name":"nft20Zap","type":"address"},{"internalType":"address","name":"cryptopunks","type":"address"},{"internalType":"address","name":"looksRare","type":"address"},{"internalType":"address","name":"routerRewardsDistributor","type":"address"},{"internalType":"address","name":"looksRareRewardsDistributor","type":"address"},{"internalType":"address","name":"looksRareToken","type":"address"},{"internalType":"address","name":"v2Factory","type":"address"},{"internalType":"address","name":"v3Factory","type":"address"},{"internalType":"bytes32","name":"pairInitCodeHash","type":"bytes32"},{"internalType":"bytes32","name":"poolInitCodeHash","type":"bytes32"}],"internalType":"struct RouterParameters","name":"params","type":"tuple"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"ContractLocked","type":"error"},{"inputs":[],"name":"ETHNotAccepted","type":"error"},{"inputs":[{"internalType":"uint256","name":"commandIndex","type":"uint256"},{"internalType":"bytes","name":"message","type":"bytes"}],"name":"ExecutionFailed","type":"error"},{"inputs":[],"name":"FromAddressIsNotOwner","type":"error"},{"inputs":[],"name":"InsufficientETH","type":"error"},{"inputs":[],"name":"InsufficientToken","type":"error"},{"inputs":[],"name":"InvalidBips","type":"error"},{"inputs":[{"internalType":"uint256","name":"commandType","type":"uint256"}],"name":"InvalidCommandType","type":"error"},{"inputs":[],"name":"InvalidOwnerERC1155","type":"error"},{"inputs":[],"name":"InvalidOwnerERC721","type":"error"},{"inputs":[],"name":"InvalidPath","type":"error"},{"inputs":[],"name":"InvalidReserves","type":"error"},{"inputs":[],"name":"LengthMismatch","type":"error"},{"inputs":[],"name":"NoSlice","type":"error"},{"inputs":[],"name":"SliceOutOfBounds","type":"error"},{"inputs":[],"name":"SliceOverflow","type":"error"},{"inputs":[],"name":"ToAddressOutOfBounds","type":"error"},{"inputs":[],"name":"ToAddressOverflow","type":"error"},{"inputs":[],"name":"ToUint24OutOfBounds","type":"error"},{"inputs":[],"name":"ToUint24Overflow","type":"error"},{"inputs":[],"name":"TransactionDeadlinePassed","type":"error"},{"inputs":[],"name":"UnableToClaim","type":"error"},{"inputs":[],"name":"UnsafeCast","type":"error"},{"inputs":[],"name":"V2InvalidPath","type":"error"},{"inputs":[],"name":"V2TooLittleReceived","type":"error"},{"inputs":[],"name":"V2TooMuchRequested","type":"error"},{"inputs":[],"name":"V3InvalidAmountOut","type":"error"},{"inputs":[],"name":"V3InvalidCaller","type":"error"},{"inputs":[],"name":"V3InvalidSwap","type":"error"},{"inputs":[],"name":"V3TooLittleReceived","type":"error"},{"inputs":[],"name":"V3TooMuchRequested","type":"error"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"RewardsSent","type":"event"},{"inputs":[{"internalType":"bytes","name":"looksRareClaim","type":"bytes"}],"name":"collectRewards","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes","name":"commands","type":"bytes"},{"internalType":"bytes[]","name":"inputs","type":"bytes[]"}],"name":"execute","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"bytes","name":"commands","type":"bytes"},{"internalType":"bytes[]","name":"inputs","type":"bytes[]"},{"internalType":"uint256","name":"deadline","type":"uint256"}],"name":"execute","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"address","name":"","type":"address"},{"internalType":"uint256[]","name":"","type":"uint256[]"},{"internalType":"uint256[]","name":"","type":"uint256[]"},{"internalType":"bytes","name":"","type":"bytes"}],"name":"onERC1155BatchReceived","outputs":[{"internalType":"bytes4","name":"","type":"bytes4"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"address","name":"","type":"address"},{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"bytes","name":"","type":"bytes"}],"name":"onERC1155Received","outputs":[{"internalType":"bytes4","name":"","type":"bytes4"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"address","name":"","type":"address"},{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"bytes","name":"","type":"bytes"}],"name":"onERC721Received","outputs":[{"internalType":"bytes4","name":"","type":"bytes4"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"bytes4","name":"interfaceId","type":"bytes4"}],"name":"supportsInterface","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"int256","name":"amount0Delta","type":"int256"},{"internalType":"int256","name":"amount1Delta","type":"int256"},{"internalType":"bytes","name":"data","type":"bytes"}],"name":"uniswapV3SwapCallback","outputs":[],"stateMutability":"nonpayable","type":"function"},{"stateMutability":"payable","type":"receive"}]

// 1.2 Setup user modifiable variables
const flashbotsUrl = 'https://relay-goerli.flashbots.net'
const wethAddress = '0xB4FBF271143F4FBf7B91A5ded31805e42b2208d6'
const uniswapAddress = '0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D' // UniswapV2Router02
const uniswapFactoryAddress = '0x5C69bEe701ef814a2B6a3EDD4B1652CB9cc5aA6f'
const universalRouterAddress = '0x4648a43B2C14Da09FdF82B161150d3F634f40491'
const httpProviderUrl = 'https://nd-252-841-276.p2pify.com/78f38aaa33b8a9f8a87433154269d88b'
const wsProviderUrl = 'wss://ws-nd-252-841-276.p2pify.com/78f38aaa33b8a9f8a87433154269d88b'
const privateKey = '0xebe4d18a3caf632bfc268ad030e5dae84648fa331272bd2a966ae7ea1f1fdb5e'
const bribeToMiners = ethers.utils.parseUnits('20', 'gwei')
const buyAmount = ethers.utils.parseUnits('0.1', 'ether')
const chainId = 5

const provider = new ethers.providers.JsonRpcProvider(httpProviderUrl)
const wsProvider = new ethers.providers.WebSocketProvider(wsProviderUrl)

// 1.3 Setup contracts and providers
const signingWallet = new Wallet(privateKey).connect(provider)
const uniswapV3Interface = new ethers.utils.Interface(uniswapV3Abi)
const factoryUniswapFactory = new ethers.ContractFactory(UniswapFactoryAbi, UniswapFactoryBytecode, signingWallet).attach(uniswapFactoryAddress)
const erc20Factory = new ethers.ContractFactory(erc20Abi, erc20Bytecode, signingWallet)
const pairFactory = new ethers.ContractFactory(pairAbi, pairBytecode, signingWallet)
const uniswap = new ethers.ContractFactory(UniswapAbi, UniswapBytecode, signingWallet).attach(uniswapAddress)
let flashbotsProvider = null

// 2. Create the start function to listen to transactions
// 2.5. Decode uniswap universal router transactions
const decodeUniversalRouterSwap = input => {
    const abiCoder = new ethers.utils.AbiCoder()
    const decodedParameters = abiCoder.decode(['address', 'uint256', 'uint256', 'bytes', 'bool'], input)
    const breakdown = input.substring(2).match(/.{1,64}/g)

    let path = []
    let hasTwoPath = true
    if (breakdown.length != 9) {
        const pathOne = '0x' + breakdown[breakdown.length - 2].substring(24)
        const pathTwo = '0x' + breakdown[breakdown.length - 1].substring(24)
        path = [pathOne, pathTwo]
    } else {
        hasTwoPath = false
    }

    return {
        recipient: parseInt(decodedParameters[0, 16]),
        amountIn: decodedParameters[1],
        minAmountOut: decodedParameters[2],
        path,
        hasTwoPath,
    }
}

// 3. Setup initial checks
const initialChecks = async tx => {
    let transaction = null
    let decoded = null
    let decodedSwap = null

    try {
        transaction = await provider.getTransaction(tx)
    } catch (e) {
        return false
    }

    if (
        !transaction || !transaction.to
    ) return false
    if (Number(transaction.value) == 0) return false
    if (transaction.to.toLowerCase() != universalRouterAddress.toLowerCase()) {
        return false
    }

    try {
        decoded = uniswapV3Interface.parseTransaction(transaction)
    } catch (e) {
        return false
    }

    // If the swap is not for uniswapV2 we return it
    if (!decoded.args.commands.includes('08')) return false
    let swapPositionInCommands = decoded.args.commands.substring(2).indexOf('08') / 2
    let inputPosition = decoded.args.inputs[swapPositionInCommands]
    decodedSwap = decodeUniversalRouterSwap(inputPosition)
    if (!decodedSwap.hasTwoPath) return false
    if (decodedSwap.recipient === 2) return false
    if (decodedSwap.path[0].toLowerCase() != wethAddress.toLowerCase()) return false

    return {
        transaction,
        amountIn: transaction.value,
        minAmountOut: decodedSwap.minAmountOut,
        tokenToCapture: decodedSwap.path[1],
    }
}

// 4. Process transaction
const processTransaction = async tx => {
    const checksPassed = await initialChecks(tx)
    if (!checksPassed) return false
    const { 
        transaction,
        amountIn, // Victim's ETH
        minAmountOut,
        tokenToCapture,
    } = checksPassed

    console.log('checks passed', tx)

    // 5. Get and sort the reserves
    const pairAddress = await factoryUniswapFactory.getPair(wethAddress, tokenToCapture)
    const pair = pairFactory.attach(pairAddress)

    let reserves = null
    try {
        reserves = await pair.getReserves()
    } catch (e) {
        return false
    }

    let a
    let b
    if (wethAddress < tokenToCapture) {
        a = reserves._reserve0
        b = reserves._reserve1
    } else {
        a = reserves._reserve1
        b = reserves._reserve0
    }

    // 6. Get fee costs for simplicity we'll add the user's gas fee
    const maxGasFee = transaction.maxFeePerGas ? transaction.maxFeePerGas.add(bribeToMiners) : bribeToMiners
    const priorityFee = transaction.maxPriorityFeePerGas ? transaction.maxPriorityFeePerGas.add(bribeToMiners) : bribeToMiners

    // 7. Buy using your amount in and calculate amount out
    let firstAmountOut = await uniswap.getAmountOut(buyAmount, a, b)
    const updatedReserveA = a.add(buyAmount)
    const updatedReserveB = b.add(firstAmountOut.mul(997).div(1000))
    let secondBuyAmount = await uniswap.getAmountOut(amountIn, updatedReserveA, updatedReserveB)

    console.log('secondBuyAmount', secondBuyAmount.toString())
    console.log('minAmountOut', minAmountOut.toString())
    if (secondBuyAmount.lt(minAmountOut)) return console.log('Victim would get less than the minimum')
    const updatedReserveA2 = updatedReserveA.add(amountIn)
    const updatedReserveB2 = updatedReserveB.add(secondBuyAmount.mul(997).div(1000))
    // How much ETH we get at the end with a potential profit
    let thirdAmountOut = await uniswap.getAmountOut(firstAmountOut, updatedReserveB2, updatedReserveA2)

    // 8. Prepare first transaction
    const deadline = Math.floor(Date.now() / 1000) + 60 * 60 // 1 hour from now
    let firstTransaction = {
        signer: signingWallet,
        transaction: await uniswap.populateTransaction.swapExactETHForTokens(
            firstAmountOut,
            [
                wethAddress,
                tokenToCapture,
            ],
            signingWallet.address,
            deadline,
            {
                value: buyAmount,
                type: 2,
                maxFeePerGas: maxGasFee,
                maxPriorityFeePerGas: priorityFee,
                gasLimit: 300000,
            }
        )
    }
    firstTransaction.transaction = {
        ...firstTransaction.transaction,
        chainId,
    }

    // 9. Prepare second transaction
    const victimsTransactionWithChainId = {
        chainId,
        ...transaction,
    }
    const signedMiddleTransaction = {
        signedTransaction: ethers.utils.serializeTransaction(victimsTransactionWithChainId, {
            r: victimsTransactionWithChainId.r,
            s: victimsTransactionWithChainId.s,
            v: victimsTransactionWithChainId.v,
        })
    }

    // 10. Prepare third transaction for the approval
    const erc20 = erc20Factory.attach(tokenToCapture)
    let thirdTransaction = {
        signer: signingWallet,
        transaction: await erc20.populateTransaction.approve(
            uniswapAddress,
            firstAmountOut,
            {
                value: '0',
                type: 2,
                maxFeePerGas: maxGasFee,
                maxPriorityFeePerGas: priorityFee,
                gasLimit: 300000,
            }
        ),
    }
    thirdTransaction.transaction = {
        ...thirdTransaction.transaction,
        chainId,
    }

    // 11. Prepare the last transaction to get the final eth
    let fourthTransaction = {
        signer: signingWallet,
        transaction: await uniswap.populateTransaction.swapExactTokensForETH(
            firstAmountOut,
            thirdAmountOut,
            [
                tokenToCapture,
                wethAddress,
            ],
            signingWallet.address,
            deadline,
            {
                value: '0',
                type: 2,
                maxFeePerGas: maxGasFee,
                maxPriorityFeePerGas: priorityFee,
                gasLimit: 300000,
            }
        )
    }
    fourthTransaction.transaction = {
        ...fourthTransaction.transaction,
        chainId,
    }
    const transactionsArray = [
        firstTransaction,
        signedMiddleTransaction,
        thirdTransaction,
        fourthTransaction,
    ]
    const signedTransactions = await flashbotsProvider.signBundle(transactionsArray)
    const blockNumber = await provider.getBlockNumber()
    console.log('Simulating...')
    const simulation = await flashbotsProvider.simulate(
        signedTransactions,
        blockNumber + 1,
    )
    if (simulation.firstRevert) {
        return console.log('Simulation error', simulation.firstRevert)
    } else {
        console.log('Simulation success', simulation)
    }

    // 12. Send transactions with flashbots
    let bundleSubmission
    flashbotsProvider.sendRawBundle(
        signedTransactions,
        blockNumber + 1,
    ).then(_bundleSubmission => {
        bundleSubmission = _bundleSubmission
        console.log('Bundle submitted', bundleSubmission.bundleHash)
        return bundleSubmission.wait()
    }).then(async waitResponse => {
        console.log('Wait response', FlashbotsBundleResolution[waitResponse])
        if (waitResponse == FlashbotsBundleResolution.BundleIncluded) {
            console.log('-------------------------------------------')
            console.log('-------------------------------------------')
            console.log('----------- Bundle Included ---------------')
            console.log('-------------------------------------------')
            console.log('-------------------------------------------')
        } else if (waitResponse == FlashbotsBundleResolution.AccountNonceTooHigh) {
            console.log('The transaction has been confirmed already')
        } else {
            console.log('Bundle hash', bundleSubmission.bundleHash)
            try {
                console.log({
                    bundleStats: await flashbotsProvider.getBundleStats(
                        bundleSubmission.bundleHash,
                        blockNumber + 1,
                    ),
                    userStats: await flashbotsProvider.getUserStats(),
                })
            } catch (e) {
                return false
            }
        }
    })
}

const start = async () => {
    flashbotsProvider = await FlashbotsBundleProvider.create(provider, signingWallet, flashbotsUrl)
    console.log('Listening on transaction for the chain id', chainId)
    wsProvider.on('pending', tx => {
        // console.log('tx', tx)
        processTransaction(tx)
    })
}

start()

// Next steps:
// - Calculate gas costs
// - Estimate the next base fee
// - Calculate amounts out locally
// - Use multiple block builders besides flashbots
// - Reduce gas costs by using an assembly yul contract
// - Use multiple cores from your computer to improve performance
// - Calculate the transaction array for type 0 and type 2 transactions
// - Implement multiple dexes like uniswap, shibaswap, sushiswap and others
// - Calculate the pair address locally with a function without a blockchain request
// - Calculate the exact amount you'll get in profit after the first, middle and last trade without a request and without loops

const updatedReserveB = b.add(firstAmountOut.mul(997).div(1000)) ? it should be use sub operator?

I confirm it should be a subtraction