electron/lib/renderer/ipc-renderer-internal.ts

const { ipc } = process.electronBinding('ipc');
const v8Util = process.electronBinding('v8_util');

// Created by init.js.
export const ipcRendererInternal = v8Util.getHiddenValue<Electron.IpcRendererInternal>(global, 'ipc-internal');
const internal = true;

ipcRendererInternal.send = function (channel, ...args) {
  return ipc.send(internal, channel, args);
};

ipcRendererInternal.sendSync = function (channel, ...args) {
  return ipc.sendSync(internal, channel, args)[0];
};

ipcRendererInternal.sendTo = function (webContentsId, channel, ...args) {
  return ipc.sendTo(internal, false, webContentsId, channel, args);
};

ipcRendererInternal.sendToAll = function (webContentsId, channel, ...args) {
  return ipc.sendTo(internal, true, webContentsId, channel, args);
};

ipcRendererInternal.invoke = async function<T> (channel: string, ...args: any[]) {
  const { error, result } = await ipc.invoke<T>(internal, channel, args);
  if (error) {
    throw new Error(`Error invoking remote method '${channel}': ${error}`);
  }
  return result;
};