Firebase: reauthenticate with phoneNumber - firebase

Question

I know that I can reauthenticate with email like this.
var user = firebase.auth().currentUser;
var credentials = firebase.auth.EmailAuthProvider.credential(
user.email,
'yourpassword'
);
user.reauthenticateWithCredential(credentials);
But how can I reauthenticate if I use phoneNumber as my sign in method?

Answer 1

It is very similar to how you sign in with phone number. You can do it in 2 ways:
Using reauthenticateWithPhoneNumber:
const recaptchaVerifier = new firebase.auth.RecaptchaVerifier(
container, parameters, firebase.app());
recaptchaVerifier.render();
user.reauthenticateWithPhoneNumber(user.phoneNumber, recaptchaVerifier)
.then((confirmationResult) => {
return confirmationResult.confirm(prompt('Enter your SMS code'));
})
.then((userCredential) => {
// User successfully reauthenticated.
});
Using reauthenticateWithCredential:
const recaptchaVerifier = new firebase.auth.RecaptchaVerifier(
container, parameters, firebase.app());
recaptchaVerifier.render();
const phoneAuthProvider = new firebase.auth.PhoneAuthProvider(auth);
phoneAuthProvider.verifyPhoneNumber(user.phoneNumber, recaptchaVerifier)
.then((verificationId) => {
const credential = firebase.auth.PhoneAuthProvider.credential(
verificationId, prompt('Enter your code'));
return user.reauthenticateWithCredential(credential);
})
.then((userCredential) => {
// User successfully reauthenticated.
});

Answer 2

In React Native using expo-firebase-recaptcha
import React, { useState, useEffect, useRef } from 'react';
import { Alert, Text, TextInput, TouchableOpacity, View } from 'react-native';
import * as firebase from 'firebase';
import { FirebaseRecaptchaVerifierModal } from "expo-firebase-recaptcha";
const firebaseConfig = {
// your firebaseConfig object
//...
};
const Reauthentication = () => {
const recaptchaRef = useRef();
const [code, setCode] = useState("");
const [verificationId, setVerificationId] = useState();
useEffect(() => {
(async () => {
const user = firebase.auth().currentUser;
const result = await user.reauthenticateWithPhoneNumber(user.phoneNumber, recaptchaRef.current);
setVerificationId(result);
})()
}, []);
const reauthenticate = () => {
verificationId.confirm(code)
.then((userCredential) => {
// User is reauthenticated
})
.catch((err) => {
Alert.alert(err);
})
}
return (
<View style={ styles.container }>
<FirebaseRecaptchaVerifierModal
ref={ recaptchaRef }
firebaseConfig={ firebaseConfig }
/>
<TextInput
keyboardType="numeric"
value={ code }
onChangeText={ (text) => setCode(text) }
/>
<TouchableOpacity onPress={ reauthenticate }>
<Text>Reauthorize</Text>
</TouchableOpacity>
</View>
)
}
export default Reauthentication;