one/libs/web3/1inch.js

const HttpKit = require('../../kit/http-kit.js')
const Config = require('../../config/config.js')
const PrivateConfig = require('../../PrivateConfig.js')
const SimpleWeb3 = require("./simple-web3");

const chainID = 56

class OneInch {}

OneInch.price = async function(fromTokenAddress, toTokenAddress, fromTokenDecimals = 18, amount = Config.baseTokenAmount) {
  fromTokenAddress = fromTokenAddress.toLowerCase()
  toTokenAddress = toTokenAddress.toLowerCase()
  amount = amount * (10 ** fromTokenDecimals)
  const url = `https://api.1inch.exchange/v3.0/${chainID}/quote?fromTokenAddress=${fromTokenAddress}&amount=${amount}` +
      `&toTokenAddress=${toTokenAddress}`
  const { data: rst } = await HttpKit.get(url)

  if (!rst || !rst.toToken || !rst.toTokenAmount) {
    return rst
  }

  const toTokenAmount = parseFloat(rst.toTokenAmount) / (10 ** rst.toToken.decimals)
  const fromTokenAmount = amount / (10 ** fromTokenDecimals)
  const price = fromTokenAmount / toTokenAmount
  rst.price = price
  Config.estimatedGas = rst.estimatedGas

  if (toTokenAddress.toLowerCase() === '0xe9e7cea3dedca5984780bafc599bd69add087d56') {
    rst.price = 1 / rst.price
  }

  return rst.price
}

OneInch.buildSwapTx = async function(fromTokenAddress = '0xe9e7cea3dedca5984780bafc599bd69add087d56', toTokenAddress = '0x111111111117dc0aa78b770fa6a738034120c302', fromTokenDecimals = 18, amount = 100, gas = Config.estimatedGas, fromAddress = PrivateConfig.address, slippage = 1) {
  amount = amount * (10 ** fromTokenDecimals)
  const url = `https://api.1inch.exchange/v3.0/${chainID}/swap?fromTokenAddress=${fromTokenAddress}&toTokenAddress=${toTokenAddress}`
      + `&amount=${amount}&fromAddress=${fromAddress}&slippage=${slippage}`
  const { data: rst } = await HttpKit.get(url, {
    'user-agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4464.0 Safari/537.36 Edg/91.0.852.0'
  })

  if (rst && rst.toToken && rst.fromToken) {
    const fromTokenAmount = parseFloat(rst.fromTokenAmount) / (10 ** rst.fromToken.decimals)
    const toTokenAmount = parseFloat(rst.toTokenAmount) / (10 ** rst.toToken.decimals)
    rst.price = fromTokenAmount / toTokenAmount
  }

  return rst
}

OneInch.swap = async function(txObject) {
  const txCount = await SimpleWeb3.web3.eth.getTransactionCount(PrivateConfig.address)
  txObject.nonce = SimpleWeb3.web3.utils.toHex(txCount)
  // txObject.gasPrice = SimpleWeb3.web3.utils.toHex(txObject.gasPrice)
  txObject.gasPrice = '0x165a0bc00'
  txObject.gas = SimpleWeb3.web3.utils.toHex(txObject.gas)
  txObject.value = SimpleWeb3.web3.utils.toHex(txObject.value)

  await SimpleWeb3.sendTransaction(txObject)
}

OneInch.Start = async function(toToken) {
  while (true) {
    toToken.alive = true

    // 如果BNB连续变化maxRefreshBNBTimes次，则1INCH或其他交易所可能已经出bug。
    if (Config.refreshBNBTimes >= Config.maxRefreshBNBTimes) {
      console.log(`机器人判定交易所可能出了bug，失败次数：${Config.refreshBNBTimes}，为保护BNB，已停止交易。`)
      break
    }

    try {
      const tokenSymbol = toToken.symbol
      const baseToken = Config.baseToken
      if (!baseToken.balance) {
        await MyKit.sleep(1000)

        continue
      }
      const binancePairSymbol = tokenSymbol + baseToken.symbol
      const amount = Config.baseTokenAmount < baseToken.balance ? Config.baseTokenAmount : baseToken.balance
      const OneInchPrice = await OneInch.price(baseToken.contract, baseToken.decimals, amount, toToken.contract)
      const binancePrice = await bs.price(binancePairSymbol)
      let distance = MyKit._N(100 * ((binancePrice / OneInchPrice) - 1.001), 4)
      let profit = MyKit._N(amount * distance / 100 - Config.charge, 4)
      let time = MyKit.getTimeByMillisecond(new Date().getTime())

      // debug
      if (Config.debug && profit > 0) {
        console.log(`[${time}, ${binancePairSymbol}] D价格: ${OneInchPrice}，C价格: ${binancePrice}，利润:${profit}。`)
      }

      // 一次判断
      if (profit > Config.profitLimit) {
        // 二次判断，并获取交易tx
        const swapRST = await OneInch.swap(baseToken.contract, toToken.contract, baseToken.decimals, amount)
        if (!swapRST) {
          continue
        }
      
        distance = MyKit._N(100 * ((binancePrice / swapRST.price) - 1.001), 4)
        profit = MyKit._N(amount * distance / 100 - Config.charge, 4)
        if (!baseToken.isSwap && profit > Config.profitLimit) {
          time = MyKit.getTimeByMillisecond(new Date().getTime())

          // gas容错
          swapRST.tx.gas = parseInt((parseInt(swapRST.tx.gas) * 1.5)) + ''

          // 如果利润大于5%，手续费*2抢单
          if (distance > 20) {
            console.log('[利润大于20%]手续费*1.5执行抢单逻辑.')
            swapRST.tx.gasPrice = parseInt((parseInt(swapRST.tx.gasPrice) * 1.5)) + ''
          }

          console.log(`[${time}, ${tokenSymbol}]判定通过, 利润率:${distance}%, 预估利润:${profit}${baseToken.symbol}, 目标利润:${Config.profitLimit}${baseToken.symbol}.\n`)
          console.log(`DEFI价格: ${swapRST.price}, CEFI价格: ${binancePrice}\n\n`)
          await wallet.transferByTX1Inch(swapRST.tx)
        }
      }

      await MyKit.sleep(5000)
    } catch (e) {
      console.log(e)
    }
  }
}

module.exports = OneInch