Firebase-js-sdk: Can I provide a custom persistence implementation for auth in node?

[nbransby]

I need to persist the user across sessions in node - is there to do this?

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[bojeil-google]

That is not currently available. We will consider it in our modularization efforts.

[nbransby]

Can you suggest a workaround? Maybe use onIdTokenChanged to save the user and updateCurrentUser on startup to restore? Problem with that is deserializing the user with the correct prototype

[JakeHedman]

Bit late to the party, but this workaround worked for me:

Save user:

const userJson = JSON.stringify(currentUser.toJSON())
// Write userJson to disk

Load user:

// Read userJson from disk
const userData = JSON.parse(userJson)
const user = new firebase.User(userData, userData.stsTokenManager, userData)
firebase.auth().updateCurrentUser(user)

[dfernandezm]

Bit late to the party, but this workaround worked for me:

Save user:

const userJson = JSON.stringify(currentUser.toJSON())
// Write userJson to disk

Load user:

// Read userJson from disk
const userData = JSON.parse(userJson)
const user = new firebase.User(userData, userData.stsTokenManager, userData)
firebase.auth().updateCurrentUser(user)

@JakeHedman I would love to implement this, but at least in my Typescript setup I get the following:

const user = new firebase.User(userData, userData.stsTokenManager, userData);

Property 'User' does not exist on type 'typeof firebase'.ts(2339)

Seems like I can reference the type but not instantiate it. I am using:

"firebase": "^7.14.3",
"firebase-admin": "^8.12.1",

Any workarounds on how to instantiate firebase.User that way with Typescript?

[billybraga]

Bit late to the party, but this workaround worked for me:

Save user:

const userJson = JSON.stringify(currentUser.toJSON())
// Write userJson to disk

Load user:

// Read userJson from disk
const userData = JSON.parse(userJson)
const user = new firebase.User(userData, userData.stsTokenManager, userData)
firebase.auth().updateCurrentUser(user)

Could this be documented as a public API so we can rely on it not changing in the future?

[tonyxiao]

Seems to break as of firebase version 7.21.0. Works on firebase version 7.19.1

[malcolmdeck]

Hey folks,

I've filed b/169069711 to track this feature request internally. The modularization effort is ongoing - once we complete that we should be in a place where we can consider this feature request.

Hope that helps!
~Malcolm