study-univ3-on-hardhat/test/FlashTest.ts

import { web3 } from "hardhat";
import contracts from "../config/contracts";
import deployer from "../.secret";

describe('Flash test', () => {
  let inAmount = 1e10.toString()

  it('Flash swap test', async () => {
    const FLASH_ABI = require('../artifacts/contracts/Flash.sol/Flash.json').abi

    let flash = new web3.eth.Contract(FLASH_ABI, contracts.FLASH)

    let rawTx = {
      from: deployer.address,
      nonce: await web3.eth.getTransactionCount(deployer.address),
      gasPrice: web3.utils.toWei('2', 'gwei'),
      gasLimit: 1e6
    }

    const WETH_USDT_POOL_CONTRACT = '0x4e68Ccd3E89f51C3074ca5072bbAC773960dFa36'
    await flash.methods
      .flashLoan({
        pool: WETH_USDT_POOL_CONTRACT,
        inToken0: true,
        inAmount: inAmount,
        sqrtPriceLimitX96: 0,
        inToken: contracts.WETH
      })
      .send(rawTx).then(console.log)
  })
})