Firebase Authentication sessions are long lived. Unless setPersistence is called, that user's current persistence type will be applied for future sign-in attempts. firebase phone authentication works like that only each time you need to send otp sent by firebase to verify user, you can write extra code to check the specific phone number os already logged in or not by storing the a boolean in internal storage after the successful authentication by firebase and can check if user comes on that activity if that boolean is true send him to next activity Only users that confirmed their email address with a email confirmation have access to your application. react-check-auth. The Realtime Database is a cloud-hosted database. I hope any of the codebase used in this tutorial helps you. Prerequisites Before getting started, the documentation assumes you are able to create a project with React Native and that you have an active Firebase project. Conclusion Congratulations! In this section, let’s configure the screen to check whether a user is logged in or not after the Sign-in button gets pressed. This component uses React 16's new context API and is just ~100 LOC. To get the auth state Firebase recommend to use the onAuthStateChanges event listener. That means if you call currentUser on auth before the localy saved auth state is loaded you would get there null and thing that the user is not signed in. The combination of these two values, allow us to show the correct stack. These are some of the strategies I try to follow with any Firebase + React Native + Expo project. Let us see it in action. https://blog.logrocket.com/user-authentication-firebase-react-apps We’ll do this with the help of the isLoggedIn state variable. react-check-auth is a tiny react component that helps you make auth checks declarative in your react or react-native app.. Even after refreshing the app, the authenticated user stays logged in. If you have come this far, I am hope enjoyed reading this post. React Native Firebase is the officially recommended collection of packages that brings React Native support for all Firebase services on both Android and iOS apps. Initially, the SDK will check if an authenticated user exists. Add the following snippet to the render method after the Google Sign-in … A Firebase React tutorial on how to enable email verification. Firebase ID tokens are short lived and last for an hour; the refresh token can be used to retrieve new ID tokens. How to check a user’s logged-in state. React Native Firebase provides native integration with the Android & iOS Firebase SDKs, supporting both realtime data sync and offline capabilities. Data is stored as JSON and synchronized in realtime to every connected client. It can also serve as a boilerplate for getting familiar with using the context API to pass information from a parent component to arbitrarily deep child components. Every time a user signs in, the user credentials are sent to the Firebase Authentication backend and exchanged for a Firebase ID token (a JWT) and refresh token. Firebase.auth().onAuthStateChanged((user) => {…}) if it changes and returns a user, then we set the isLoading to false and userLogged to true or false, based on the user object presence.