diff --git a/ios/RNFirebase/messaging/RNFirebaseMessaging.m b/ios/RNFirebase/messaging/RNFirebaseMessaging.m
index 43280ec4..5626b407 100644
--- a/ios/RNFirebase/messaging/RNFirebaseMessaging.m
+++ b/ios/RNFirebase/messaging/RNFirebaseMessaging.m
@@ -212,6 +212,19 @@ RCT_EXPORT_METHOD(getInitialMessage:(RCTPromiseResolveBlock)resolve rejecter:(RC
         resolve(nil);
     }
 }
+
+RCT_EXPORT_METHOD(hasPermission: (RCTPromiseResolveBlock)resolve rejecter:(RCTPromiseRejectBlock)reject) {
+    if (floor(NSFoundationVersionNumber) <= NSFoundationVersionNumber_iOS_9_x_Max) {
+        resolve(@([RCTSharedApplication() currentUserNotificationSettings].types != UIUserNotificationTypeNone));
+    } else {
+        #if defined(__IPHONE_10_0) && __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_10_0
+            [[UNUserNotificationCenter currentNotificationCenter] getNotificationSettingsWithCompletionHandler:^(UNNotificationSettings * _Nonnull settings) {
+                resolve(@(settings.alertSetting == UNNotificationSettingEnabled));
+            }];
+        #endif
+    }
+}
+    
     
 RCT_EXPORT_METHOD(sendMessage: (NSDictionary *) message
                       resolve:(RCTPromiseResolveBlock) resolve
diff --git a/lib/modules/messaging/index.js b/lib/modules/messaging/index.js
index b1486210..83a48f68 100644
--- a/lib/modules/messaging/index.js
+++ b/lib/modules/messaging/index.js
@@ -13,28 +13,29 @@ import type App from '../core/firebase-app';
 
 type Notification = {
   body: string,
-  bodyLocalizationArgs: string[],
-  bodyLocalizationKey: string,
-  clickAction: string,
-  color: string,
-  icon: string,
-  link: string,
+  bodyLocalizationArgs?: string[],
+  bodyLocalizationKey?: string,
+  clickAction?: string,
+  color?: string,
+  icon?: string,
+  link?: string,
   sound: string,
-  tag: string,
+  subtitle?: string,
+  tag?: string,
   title: string,
-  titleLocalizationArgs: string[],
-  titleLocalizationKey: string,
+  titleLocalizationArgs?: string[],
+  titleLocalizationKey?: string,
 };
 
 type Message = {
-  collapseKey: string,
+  collapseKey?: string,
   data: { [string]: string },
-  from: string,
+  from?: string,
   messageId: string,
   messageType?: string,
   openedFromTray: boolean,
   notification?: Notification,
-  sentTime: number,
+  sentTime?: number,
   to?: string,
   ttl?: number,
 };
@@ -54,7 +55,7 @@ type OnTokenRefreshObserver = {
 type RemoteMessage = {
   collapseKey?: string,
   data: { [string]: string },
-  messageId?: string,
+  messageId: string,
   messageType?: string,
   to: string,
   ttl: number,
@@ -164,6 +165,10 @@ export default class Messaging extends ModuleBase {
     return getNativeModule(this).getInitialMessage();
   }
 
+  hasPermission(): Promise<boolean> {
+    return getNativeModule(this).hasPermission();
+  }
+
   sendMessage(remoteMessage: RemoteMessage): Promise<void> {
     return getNativeModule(this).send(remoteMessage);
   }