one/1inch.js

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

const chainID = 56

class OneInch {}

OneInch.price = async function (fromTokenAddress = '0xe9e7cea3dedca5984780bafc599bd69add087d56',
                             fromTokenDecimals = 18,
                             amount = Config.baseTokenAmount,
                             toTokenAddress = '0xbb4CdB9CBd36B01bD1cBaEBF2De08d9173bc095c') {
  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.swap = 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
}

module.exports = OneInch