//...
const setupIwc = require('electron-iwc');

app.on('ready', () => {
  setupIwc(); // deploy a global EventEmitter (global.Iwc)

  //...
});

//...

//...
const { remote } = require('electron');
const iwc = remote.getGlobal('Iwc');

iwc.on('message', (data) => {
  console.log(data);
});

//...
const { remote } = require('electron');
const iwc = remote.getGlobal('Iwc');

iwc.emit('message', 'hello from sender.js');