one/dodo.js

const HttpKit = require('./kit/HttpKit')
const Config = require("./Config")
const PrivateConfig = require('./PrivateConfig.js')

const chainID = 56
const rpc = 'https://bsc-dataseed1.binance.org'

class DoDo {}

DoDo.price = async function (sellToken = '0xe9e7cea3dedca5984780bafc599bd69add087d56',
                             sellTokenDecimals = 18,
                             sellAmount = 100,
                             buyToken = '0xba2ae424d960c26247dd6c32edc70b295c744c43',
                             slippagePercentage = 0.03,
                             affiliateAddress = '0x221d5c4993297Fd95fA17743b9297E2e49FCe9D2') {
  sellAmount = sellAmount * (10 ** sellTokenDecimals)
  const url = `https://bsc.api.0x.org/swap/v1/quote?sellToken=${sellToken}&sellAmount=${sellAmount}&buyToken=${buyToken}`
      + `&slippagePercentage=${slippagePercentage}&affiliateAddress=${affiliateAddress}`
  const { data: rst } = await HttpKit.get(url)

  if (!rst || !rst.price) {
    return rst
  }

  if (sellToken === '0xe9e7cea3dedca5984780bafc599bd69add087d56') {
    return 1 / parseFloat(rst.price)
  } else {
    parseFloat(rst.price)
  }
}

DoDo.swap = async function (fromTokenAddress = '0xe9e7cea3dedca5984780bafc599bd69add087d56',
                            fromTokenDecimals = 18,
                            toTokenAddress = '0x111111111117dc0aa78b770fa6a738034120c302',
                            toTokenDecimals = 18,
                            amount = 100,
                            userAddr = PrivateConfig.address,
                            slippage = 1) {
  amount = amount * (10 ** fromTokenDecimals)
  const url = `https://dodo-route.dodoex.io/dodoapi/getdodoroute?fromTokenAddress=${fromTokenAddress}&fromTokenDecimals=${fromTokenDecimals}`
      + `&toTokenAddress=${toTokenAddress}&toTokenDecimals=${toTokenDecimals}&fromAmount=${amount}&userAddr=${userAddr}`
      + `&slippage=${slippage}&chainId=${chainID}&rpc=${rpc}`
  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'
  })
  return rst
}

module.exports = DoDo