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;

// TODO(MarshallOfSound): Remove if statement when isolated_bundle and content_script_bundle are gone
if (!ipcRendererInternal.send) {
  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;
  };
}