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MismatchsenderId can happen while sending the push notifications primarily due to a conflict between the private key uploaded on MoEngage dashboard and google-services.json file in the Android project. Kindly ensure you use the private key and the json file from the same project.

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Incorrect google-services.json file

Every Firebase project will have a Project ID. There are couple of things to check for correct json file.
  • This Project ID should be same in the google-services.json file that is present in your Android app.
Screenshot 2024-02-01 at 1.38.10 PM.png Screenshot 2024-02-01 at 1.37.44 PM.png
  • Package name in your manifest file also should match the package name in the google-services.json file
Screenshot 2024-02-01 at 2.40.20 PM.png

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Incorrect private key on MoEngage Dashboard

To verify if you have uploaded the right private key, the project_id in the private key should match with the Firebase Project ID. You can open the private key json file in any text editor and it will have the project_id key with value as your project ID. Screenshot 2024-02-01 at 2.37.14 PM.png Private key is usually generated from service accounts page, don’t generate a new key if you already have a key.