Firebase is a popular mobile and web application development platform provided by Google. It offers various services, including Firebase Cloud Messaging (FCM) for sending push notifications to devices. However, while using Firebase, you may encounter errors like “E/FirebaseInstanceId: Failed to get FIS auth token.” In this blog post, we will discuss the possible causes and solutions for this error.
Table of Contents:
- Introduction to Firebase and Firebase Cloud Messaging (FCM)
- Understanding the “Failed to get FIS auth token” Error
- Possible Causes for the Error a. Incorrect Phone Time b. Outdated google-services.json File c. Mismatched Package Name d. Dependency Compatibility Issues
- Solutions to Resolve the Error a. Reset Phone Time b. Update google-services.json File c. Check Package Name d. Verify Dependency Versions
- Step-by-Step Guide to Implement Solutions a. Resetting Phone Time b. Updating google-services.json File c. Verifying Package Name d. Checking Dependency Versions
Introduction to Firebase and Firebase Cloud Messaging (FCM) Firebase is a comprehensive app development platform that provides various services such as authentication, real-time database, cloud storage, and more. One of its key features is Firebase Cloud Messaging (FCM), which enables developers to send push notifications to their users’ devices.
Understanding the “Failed to get FIS auth token” Error When working with Firebase and FCM, you might come across an error message in your application logs: “E/FirebaseInstanceId: Failed to get FIS auth token.” This error indicates that there is an issue with obtaining the Firebase Installation ID (FIS) authentication token.
Possible Causes for the Error There are several possible causes for the “Failed to get FIS auth token” error. Some common causes include incorrect phone time, outdated google-services.json file, mismatched package name, and dependency compatibility issues.
Solutions to Resolve the Error To resolve the “Failed to get FIS auth token” error, we can implement various solutions based on the possible causes. These solutions include resetting the phone time, updating the google-services.json file, checking the package name, and verifying the dependency versions.
Step-by-Step Guide to Implement Solutions In this section, we will provide a step-by-step guide to implementing the solutions mentioned in the previous section. The guide will include detailed instructions and code snippets to help you resolve the “Failed to get FIS auth token” error.
To resolve this specific error, you can try the following solutions:
Check your project’s dependencies: Make sure you have the necessary Firebase libraries added to your project’s build.gradle file.
Update google-services.json: Delete the existing google-services.json file from your project and download a fresh copy from the Firebase console (Project Settings). Replace the old file with the new one.
Verify package name and project settings: Double-check that the package name in your google-services.json file matches the package name of your Android application. Ensure that you have accepted any new terms and conditions in the Firebase console.
Clean and rebuild the project: Run a clean build of your project to ensure that any outdated or conflicting files are removed. This can be done through the build menu in Android Studio or by using Gradle commands.
Check API key permissions: Verify that the API key you are using in the Firebase console has the necessary permissions for Firebase Installations, Firebase Cloud Messaging, and related APIs. Adjust the restrictions in your Google Cloud Platform account if needed.