index.js

import { BigNumber } from "@ethersproject/bignumber";
import { ethers } from "ethers";
import * as fs from "fs";

const tokens = [
  { name: "wbtc", path: "transactions/wbtc.json" },
  { name: "usdc", path: "transactions/usdc.json" },
  { name: "usdt", path: "transactions/usdt.json" },
];

const provider = new ethers.JsonRpcProvider(
  "https://eth-mainnet.g.alchemy.com/v2/GhRSCpl1KlIV2MC4wdVyXXQrlMGq34K8"
);

const main = async () => {
  const avgGasCost = {};
  for (let i = 0; i < tokens.length; i++) {
    const { name, path } = tokens[i];
    const transactions = JSON.parse(fs.readFileSync(path, "utf-8"));

    let totalGasUsed = BigNumber.from("0");
    let numValidTx = 0;
    for (let i = 0; i < transactions.length; i++) {
      const tx = transactions[i];

      console.log(`process token ${name}: ${i + 1}/${transactions.length}`);
      const res = await provider.getTransactionReceipt(tx);
      if (res.status != 1) continue;
      totalGasUsed = totalGasUsed.add(res.gasUsed);
      numValidTx++;
    }

    avgGasCost[name] = {
      totalGasUsed: totalGasUsed.toString(),
      numberOfTx: numValidTx,
      avgGasCost: totalGasUsed.div(numValidTx).toString(),
    };

    console.log(`${name} token processed!`);
  }
  fs.writeFileSync("gasCost.json", JSON.stringify(avgGasCost));
};

await main();