MaticEvents.js

const express = require("express");
const app = express();

const Web3 = require("web3");
const abi = [
  {
    constant: false,
    inputs: [],
    name: "emitEvent",
    outputs: [],
    payable: false,
    stateMutability: "nonpayable",
    type: "function"
  },
  {
    anonymous: false,
    inputs: [
      {
        indexed: false,
        name: "hash",
        type: "string"
      },
      {
        indexed: false,
        name: "number",
        type: "uint256"
      },
      {
        indexed: false,
        name: "hey",
        type: "address"
      }
    ],
    name: "Call",
    type: "event"
  }
];
const address = "0x68590f1760110eee55b3b46d8f64c5b17e535da6";
const web3 = new Web3(
  new Web3.providers.WebsocketProvider("https://testnet2.matic.network/")
);

app.listen(5000, function() {
  let contract = new web3.eth.Contract(abi, address);
  contract.events.Call({ fromBlock: 0 }).on("data", event => {
    console.log(event);
  });
});

TruffleEvents.js

const express = require("express");
const app = express();

const Web3 = require("web3");
const abi = [
  {
    constant: false,
    inputs: [],
    name: "emitEvent",
    outputs: [],
    payable: false,
    stateMutability: "nonpayable",
    type: "function"
  },
  {
    anonymous: false,
    inputs: [
      {
        indexed: false,
        name: "hash",
        type: "string"
      },
      {
        indexed: false,
        name: "number",
        type: "uint256"
      },
      {
        indexed: false,
        name: "hey",
        type: "address"
      }
    ],
    name: "Call",
    type: "event"
  }
];
const address = "0xaf4cb0864dc1a04726b3d90f1015f5dab0411612";
const web3 = new Web3(new Web3.providers.WebsocketProvider("http://localhost:8545"));

app.listen(5000, function() {
  let contract = new web3.eth.Contract(abi, address);
  contract.events.Call({ fromBlock: 0 }).on("data", event => {
    console.log(event);
  });
});