Possible to create 'transaction' for adding new user via firebase auth and writing to firestore?

Question

I have a step in my new user flow where a user is registered with Firebase auth, and then a record is written to Firestore.

Is there a straightforward way to put both the user registration and the firebase write into a transaction, so if either one fails, they both fail?

Answer 1

Is there a straightforward way to put both the user registration and the firebase write into a transaction, so if either one fails, they both fail?

There are no Firebase products that support cross-product transactional operations. You'll have to nest both calls and always handle the errors. So do the authentication, and then write the data to Firestore or the Realtime Database.

A more convenient way of handling this situation would be to trigger a Cloud Functions in response to the creation of a Firebase user account. In this way, you will only need to handle a single operation on the client.