How to handle refresh token with Firebase in Ionic 4?

Question

I'm trying to implement firebase as Auth mechanism in my Ionic 4 app. I'm using this code to let the user signIn with email and password:

    loginUser(value){
   return new Promise<any>((resolve, reject) => {
     firebase.auth().signInWithEmailAndPassword(value.email, value.password)
     .then(
       res => resolve(res),
       err => reject(err))
   })
  }

Since Firebase works with accessToken that expires after 1 hour of the creation and with refreshToken to refresh the first one, I'm not sure how to move on; I mean should I save both accessToken and refreshToken in my database? How to refresh the token? Is this operation done automatically or should I do something? I'm using also a JavaEE server, which detect if the user is correctly logged with Firebase, by passing the accessToken.

Answer 1

should I save both accessToken and refreshToken in my database?

Instead of persisting the tokens yourself, tell Firebase where to persist the authentication information with Auth.setPersistence() . For example:

firebase.auth().setPersistence(fire.localPersistence())

Be sure to test if this is even needed though, as on most environments Firebase will automatically determine where to persist the authentication state.

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How to refresh the token? Is this operation done automatically or should I do something?

The ID token is automatically refreshed by the Firebase SDK, about 55 minutes after it was created.