Read Contract Events with ethers.js

import { ethers } from "ethers";

const abi = [
  "event Transfer(address indexed from, address indexed to, uint256 value)",
  "function name() view returns (string)",
];

const provider = new ethers.JsonRpcProvider("https://rpc.ankr.com/eth");
const contract = new ethers.Contract(tokenAddress, abi, provider);

// Query historical Transfer events in the last 10,000 blocks
const currentBlock = await provider.getBlockNumber();
const events = await contract.queryFilter(
  "Transfer",
  currentBlock - 10_000,
  currentBlock
);
console.log(`Found ${events.length} Transfer events`);

// Listen to new Transfer events in real-time
contract.on("Transfer", (from, to, value, event) => {
  console.log(`${from} -> ${to}: ${ethers.formatEther(value)}`);
});