react-native/Libraries/TurboModule/TurboModuleRegistry.js

/**
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @flow
 * @format
 */

'use strict';

import NativeModules from '../BatchedBridge/NativeModules';
import type {TurboModule} from './RCTExport';
import invariant from 'invariant';

const turboModuleProxy = global.__turboModuleProxy;

export function get<T: TurboModule>(name: string): ?T {
  // Backward compatibility layer during migration.
  const legacyModule = NativeModules[name];
  if (legacyModule != null) {
    return ((legacyModule: any): T);
  }

  if (turboModuleProxy != null) {
    const module: ?T = turboModuleProxy(name);
    return module;
  }

  return null;
}

export function getEnforcing<T: TurboModule>(name: string): T {
  const module = get(name);
  invariant(module != null, `${name} is not available in this app.`);
  return module;
}