Kyber (classic): swap eth to usdt

01_classicSwap.js

const ethers = require('ethers');


const dmmRouterAbi = require("../abis/dmmRouter.json")
const erc20Abi = require("../abis/erc20.json")
const wethAbi = require("../abis/weth.json")


WETH_ADDRESS= '0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2'
USDT_ADDRESS= '0xdAC17F958D2ee523a2206206994597C13D831ec7'
DMM_ROUTER_ADDRESS='0x1c87257F5e8609940Bc751a07BB085Bb7f8cDBE6'


const provider = new ethers.providers.JsonRpcProvider('http://127.0.0.1:8545/')
const wallet = new ethers.Wallet('0xac0974bec39a17e36ba4a6b4d238ff944bacb478cbed5efcae784d7bf4f2ff80')
const signer = wallet.connect(provider)


const dmmRouter = new ethers.Contract(DMM_ROUTER_ADDRESS, dmmRouterAbi, provider)
const usdt = new ethers.Contract(USDT_ADDRESS, erc20Abi, provider)
const weth = new ethers.Contract(WETH_ADDRESS, wethAbi, provider)


const logBalances = async () => {
    const ethBalance = await provider.getBalance(signer.address)
    const usdtBalance = await usdt.balanceOf(signer.address)
    const wethBalance = await weth.balanceOf(signer.address)
    console.log('--------------------')
    console.log('ETH Balance:', ethers.utils.formatUnits(ethBalance, 18))
    console.log('WETH Balance:', ethers.utils.formatUnits(wethBalance, 18))
    console.log('USDT Balance:', ethers.utils.formatUnits(usdtBalance, 6))
    console.log('--------------------')
}


const POOL_ADDRESSES = [
    '0xf8467EF9de03E83B5a778Ac858EA5c2d1FC47188',
    '0xcE9874C42DcE7fffbE5E48B026Ff1182733266Cb',
    '0xCD9fD9Cf78CAD37b3a913681A6c3fD2Ce0606827'
]


const main = async () => {
    logBalances()

    const amountIn = ethers.utils.parseUnits('1', 18)

    // const tx1 = await weth.connect(signer).approve(DMM_ROUTER_ADDRESS, amountIn)
    // tx1.wait()

    const tx2 = await dmmRouter.connect(signer).swapExactETHForTokens(
        0,
        [POOL_ADDRESSES[0]],
        [WETH_ADDRESS, USDT_ADDRESS],
        signer.address,
        Math.floor(Date.now() / 1000) + (60 * 10),
        {
            value: amountIn
        }
    )
    tx2.wait()

    logBalances()
}
main()

/*
node scripts/01_classicSwap.js
*/

hardhat.config.js

/** @type import('hardhat/config').HardhatUserConfig */
module.exports = {
  solidity: "0.8.18",
  networks: {
    hardhat: {
      forking: {
        url: "https://mainnet.infura.io/v3/abc"
      }
    }
  }
};

package.json

{
  "name": "classic-swap",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "dependencies": {
    "ethers": "^5.7.2",
    "hardhat": "^2.14.0"
  }
}