4-query-events.js

import { ethers } from 'ethers';
import { formatUnits } from 'ethers/lib/utils.js';
import { ALCHEMY_API_KEY_MAINNET } from './constants.js';

const rpcUrl = `https://eth-mainnet.g.alchemy.com/v2/${ALCHEMY_API_KEY_MAINNET}`;

const imxERC20TokenAddress = "0xF57e7e7C23978C3cAEC3C3548E3D615c346e79fF";

const contractABI = [
  "function name() view returns (string)",
  "function symbol() view returns (string)",
  "function decimals() view returns (uint8)",
  "function balanceOf(address account) view returns (uint256)",
  "event Transfer(address indexed from, address indexed to, uint256 value)"
];

async function queryEvents() {
  const provider = new ethers.providers.JsonRpcProvider(rpcUrl);

  const contract = new ethers.Contract(imxERC20TokenAddress, contractABI, provider);

  const filter = contract.filters.Transfer();
  // query all IMX transfer events in the last 200 blocks
  const events = await contract.queryFilter(filter, provider.blockNumber - 200, provider.blockNumber);

  const logTransfer = (event) => console.log(`${event.args.from} transferred ${formatUnits(event.args.value, 18)} IMX to ${event.args.to}`);
  events.forEach(logTransfer);
}
queryEvents();