more work on multiple apps support

lib/firebase-app.js

@@ -3,12 +3,16 @@ import { NativeModules } from 'react-native';
 import INTERNALS from './internals';
 
 // modules
+// todo
 import Crash from './modules/crash';
 import Performance from './modules/perf';
-import RemoteConfig from './modules/config';
 import Analytics from './modules/analytics';
-import Auth, { statics as AuthStatics } from './modules/auth';
 import AdMob, { statics as AdMobStatics } from './modules/admob';
+// ----
+
+
+import Auth, { statics as AuthStatics } from './modules/auth';
+import RemoteConfig from './modules/config';
 import Storage, { statics as StorageStatics } from './modules/storage';
 import Database, { statics as DatabaseStatics } from './modules/database';
 import Messaging, { statics as MessagingStatics } from './modules/messaging';
@@ -56,6 +60,10 @@ export default class FirebaseApp {
     return this._staticsOrModuleInstance('auth', AuthStatics, Auth);
   }
 
+  get config() {
+    return this._staticsOrModuleInstance('config', {}, RemoteConfig);
+  }
+
   get database() {
     return this._staticsOrModuleInstance('database', DatabaseStatics, Database);
   }

lib/firebase.js

@@ -12,6 +12,7 @@ import FirebaseApp from './firebase-app';
 
 // module imports
 import Auth, { statics as AuthStatics } from './modules/auth';
+import RemoteConfig from './modules/config';
 import Storage, { statics as StorageStatics } from './modules/storage';
 import Database, { statics as DatabaseStatics } from './modules/database';
 import Messaging, { statics as MessagingStatics } from './modules/messaging';
@@ -110,6 +111,11 @@ class FirebaseCore {
     return this._appNamespaceOrStatics('auth', AuthStatics, Auth);
   }
 
+  get config() {
+    return this._appNamespaceOrStatics('config', {}, RemoteConfig);
+  }
+
+
   get database() {
     return this._appNamespaceOrStatics('database', DatabaseStatics, Database);
   }

lib/utils/ModuleBase.js

@@ -8,6 +8,13 @@ import INTERNALS from './../internals';
 
 const logs = {};
 
+// Firebase Native SDKs that support multiple app instances
+const MULTI_APP_MODULES = [
+  'auth',
+  'database',
+  'storage',
+];
+
 export default class ModuleBase {
   constructor(firebaseApp, options, moduleName, withEventEmitter = false) {
     this._options = Object.assign({}, options);
@@ -24,7 +31,12 @@ export default class ModuleBase {
     }
 
     // used by the modules that extend ModuleBase to access their native module counterpart
-    this._native = nativeWithApp(this._appName, nativeModule);
+    if (!MULTI_APP_MODULES.includes(moduleName.toLowerCase())) {
+      this._native = nativeModule;
+    } else {
+      this._native = nativeWithApp(this._appName, nativeModule);
+    }
+
     if (withEventEmitter) {
       this._eventEmitter = new NativeEventEmitter(this._native);
     }