Question 119989 in Firebase Question posted in
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Firebase – setting currentUser

Assuming that I have a whole user object as a JSON (with its access and refresh tokens) – how can I force firebase/auth to accept it as its currentUser so it triggers e.g. onTokenIdChange?

EDIT:
I want to authenticate the user on a website (my app #1), and inform the browser extension (my app #2) if successful. Right now I’m passing the JSON representation of a user returned from the website’s onTokenIdChange to the extension.

EDIT2:
This is the user’s JSON I’m referring to:

{
    "uid": "some-uid-here",
    "email": "[email protected]",
    "emailVerified": false,
    "isAnonymous": false,
    "providerData": [
        {
            "providerId": "password",
            "uid": "[email protected]",
            "displayName": null,
            "email": "[email protected]",
            "phoneNumber": null,
            "photoURL": null
        }
    ],
    "stsTokenManager": {
        "refreshToken": "my-refresh-token",
        "accessToken": "my-access-token",
        "expirationTime": 1664750677967
    },
    "createdAt": "1664712317951",
    "lastLoginAt": "1664740255685",
    "apiKey": "my-api-key",
    "appName": "[DEFAULT]"
}
Tags:

2

Answers


  1. 0

    Passing the user profile around is not enough to authenticate a user with. If you want to authenticate the user in a different context, you’ll have to pass their credentials around or mint a custom token for them and sign them in with that.

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  2. 0

    Not sure if I understood the question, but as far as I know, you have to either

    1. Use one of the default signIn methods (like signInWithEmailAndPassword), which requires user input; I think you are chasing something different

    2. Use the custom token approach mentioned by Frank. In that case, your backend application will use the firebase-admin-sdk to generate custom tokens for a given user, acording to the business logic you desire. Only after that your frontend application will use the firebase/auth lib to run the signInWithCustomToken, which will log you in.
      Example: your app #2 must have a way to communicate with your backend in order to retrieve a custom token for the given user

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