Delegation transition from v7 to v9 for Firebase

[eric4]

Hi all,
I have an application that uses both Auth0 and Firebase.

Using Auth0.js, I followed the instructions here for changing delegation methodologies from getDelegationToken to client.delegation: Migrate getDelegationToken() to auth0.js v9

However, when I try to use the returned token for firebase login, I’m getting the error: “auth/invalid-custom-token:The custom token format is incorrect. Please check the documentation.”

For reference, here is the original (working) v7 code:

auth0.getDelegationToken({
id_token: profile.idToken,
api: ‘firebase’,
“scope”: “openid profile”
}, function (err, delegationResult) {
if(delegationResult){
firebase.auth().signInWithCustomToken(delegationResult.id_token).then(function(data){
self.signIn(profile)
}).catch(function(e) {
console.log(e.code + “:” + e.message);
});
}
});

and here is the new (non-working) v9 code I’ve written:

webAuth.client.delegation({
client_id: client_id,
grant_type: ‘urn:ietf:params:oauth:grant-type:jwt-bearer’,
id_token: profile.idToken,
scope: ‘openid profile email’,
api_type: ‘firebase’
},function(err,delegationResult) {
firebase.auth().signInWithCustomToken(delegationResult.idToken).then(function(data){
self.signIn(profile)
}).catch(function(e) {
console.log(e.code + “:” + e.message);
});
});

“delegationResult.idToken” is what appears to be in the wrong format, but I don’t see any other value returned by the delegation endpoint to use.

Any help would be greatly appreciated!

Thanks

[eric4]

Turns out I was using Firebase credentials that didn’t match the Firebase app associated with my Auth0 account. This works now!

[konrad.sopala]

Perfect! Glad you have figured it out!