script.js

const { ethers } = require("ethers");

require("dotenv").config();

const SimulatorV1ABI = require("./out/SimulatorV1.sol/SimulatorV1.json").abi;

// DO NOT USE REAL PRIVATE KEY
const provider = new ethers.providers.JsonRpcProvider(process.env.ALCHEMY_URL);
const signer = new ethers.Wallet(process.env.TEST_PRIVATE_KEY, provider);
const SimulatorV1Address = process.env.CONTRACT_ADDRESS;

async function checkContractCode(provider, contractAddress) {
  try {
    // Fetch the code at the contract address
    const code = await provider.getCode(contractAddress);

    if (code === "0x") {
      console.log("No contract found at the provided address.");
      return false;
    } else {
      console.log("Contract found.");
      return true;
    }
  } catch (error) {
    console.error("An error occurred", error);
    return false;
  }
}

const contract = new ethers.Contract(
  SimulatorV1Address,
  SimulatorV1ABI,
  signer,
);

(async () => {
  if (!(await checkContractCode(provider, SimulatorV1Address))) {
    return;
  }

  const swapParam1 = {
    protocol: 0,
    pool: "0x2791Bca1f2de4661ED88A30C99A7a9449Aa84174",
    tokenIn: "0x2791Bca1f2de4661ED88A30C99A7a9449Aa84174",
    tokenOut: "0xc2132D05D31c914a87C6611C10748AEb04B58e8F",
    fee: 0,
    amount: ethers.utils.parseUnits("1", 6),
  };

  const swapParam2 = {
    protocol: 1,
    pool: "0x2791Bca1f2de4661ED88A30C99A7a9449Aa84174",
    tokenIn: "0xc2132D05D31c914a87C6611C10748AEb04B58e8F",
    tokenOut: "0x2791Bca1f2de4661ED88A30C99A7a9449Aa84174",
    fee: 500,
    amount: 0,
  };

  const swapParam3 = {
    protocol: 2,
    pool: "0x445FE580eF8d70FF569aB36e80c647af338db351",
    tokenIn: "0x2791Bca1f2de4661ED88A30C99A7a9449Aa84174",
    tokenOut: "0xc2132D05D31c914a87C6611C10748AEb04B58e8F",
    fee: 0,
    amount: 0,
  };

  const swapParams = [swapParam1, swapParam2, swapParam3];

  const amountOut = await contract.callStatic.simulateSwapIn(swapParams);
  console.log(amountOut.toString());
})();