iOS error with Firebase Auth Sign In using Twitter credentials - ios

Question

I have a iOS Firebase app that supports Twitter login, but occasionally the signIn(with: credential call randomly fails and I can't figure out why.
First the user signs in with Twitter (which never fails), then I use the Twitter session to get the credentials, and then I use those credentials to sign in with Firebase which sometimes fails.
Here's the complete code
func twitterLogin(_ done:#escaping (_ user: FIRUser?, _ err: Error?) -> Void) {
Twitter.sharedInstance().logIn() { session, error in
guard error == nil else {
done(nil, error)
return
}
let credential = FIRTwitterAuthProvider.credential(withToken: session!.authToken, secret: session!.authTokenSecret)
FIRAuth.auth()?.signIn(with: credential, completion: { (signUser, error) in
//User is signed in
// ERROR OCCURS HERE. ANY HELP WOULD BE GREATLY APPRECIATED
done(signUser, error)
})
}
}
Here's the exact error message I'm getting.
UserInfo={NSUnderlyingError=0x600000442c10 {Error Domain=FIRAuthInternalErrorDomain Code=3 "(null)" UserInfo={FIRAuthErrorUserInfoDeserializedResponseKey={
code = 400;
errors = (
{
domain = global;
message = "Network error while to fetch VERIFY_CREDENTIAL from TWITTER.";
reason = invalid;
}
);
message = "Network error while to fetch VERIFY_CREDENTIAL from TWITTER.";
}}}, error_name=ERROR_INTERNAL_ERROR, NSLocalizedDescription=An internal error has occurred, print and inspect the error details for more information.})
I've tried to specifically search for the error message I'm getting "Network error while to fetch VERIFY_CREDENTIAL from TWITTER." but I can't find any solution. I found some posts which I believe were in Japanese but I couldn't understand their solution.
I even looked at Firebases iOS Auth errors here
https://firebase.google.com/docs/auth/ios/errors
but the error key FIRAuthErrorUserInfoDeserializedResponseKey isn't even listed as a possible error for signInWithCredential:completion:

Answer 1

I'm seeing the same error. Example at codepen:
https://codepen.io/mosse/pen/KmGMap
<button class="login">login</button>
<script src="https://www.gstatic.com/firebasejs/4.0.0/firebase.js"></script>
<script>
var config = {
apiKey: "AIzaSyDfJ5KuDofcZpahzl4H3XTl4f6R65gUyrQ",
authDomain: "authtest-3a944.firebaseapp.com",
projectId: "authtest-3a944",
};
firebase.initializeApp(config);
</script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<script>
$(document).ready(function(){
$(".login").click(function(){
var providerObj = new firebase.auth.TwitterAuthProvider();
firebase.auth().signInWithPopup(providerObj)
.then(result => {
console.log('success')
console.log(result.user)
})
.catch( err => {
console.log('failure')
console.log(err.message)
})
});
});
</script>
Firebase support suggest the cause is due to an unreliable Twitter endpoint, but haven't suggested any solution.
An older project using Firebase 2.3.2 does not replicate the error, which suggests that there should be a Firebase solution to me.