AppDelegate

swift

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
    func application(_ application: UIApplication,
                     didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
        if let configurationPath = Bundle.main
            .path(forResource: "GoogleService-Info-Release.plist", ofType: nil),
            let path = configurationPath,
            let options = FirebaseOptions(contentsOfFile: path) {
            FirebaseApp.configure(options: options)
        }
        
        Messaging.messaging().delegate = self
        
        UNUserNotificationCenter.current().delegate = self
        
        let authOptions: UNAuthorizationOptions = [.alert, .badge, .sound]
        UNUserNotificationCenter.current().requestAuthorization(
            options: authOptions,
            completionHandler: {_, _ in })
        
        application.registerForRemoteNotifications()
        
        return true
    }
}

extension AppDelegate: MessagingDelegate {
    func messaging(_ messaging: Messaging, didReceiveRegistrationToken fcmToken: String) {
        print(fcmToken)
        try? firebaseTokenService.save(fcmToken)
        updateProvider?.updateUserTokens()
    }
}