How to prevent dynamicLink listener from firing multiple times in react-native? - react-native

Question

I have enabled signInWithEmailLink() from firebase in my react-native app.
Everything works successfully, the user is also created but the I think the onLink(handleLink) listener is fired multiple times and leads to an error even after user sign-in.
Logs:
link is tru
LOG email: email#gmail.com //I have hidden the actual email
LOG email: email#gmail.com
LOG email: email#gmail.com
LOG USer created
LOG EROR: [Error: [auth/invalid-action-code] The out of band code is invalid. This can happen if the code is malformed, expired, or has already been used.]
LOG EROR: [Error: [auth/invalid-action-code] The out of band code is invalid. This can happen if the code is malformed, expired, or has already been used.]
LOG EROR: [Error: [auth/invalid-action-code] The out of band code is invalid. This can happen if the code is malformed, expired, or has already been used.]
As you can see its fired multiple times, how can I prevent this??
This is my code:
const handleLink = async link => {
console.log('opened Link: ', link.url);
if (auth().isSignInWithEmailLink(link.url)) {
console.log('link is tru');
try {
const email = await AsyncStorage.getItem('email');
console.log('email: ', email);
await auth()
.signInWithEmailLink(`${email}`, link.url)
.then(() => {
console.log('USer created');
})
.catch(err => {
console.log('EROR: ', err);
});
} catch (err) {
console.log('err: ', err);
}
} else {
console.log('link is false');
}
};
const link = dynamicLinks().onLink(handleLink);
Help would be very much appreciated

Answer 1

Since console.log('email: ', email); is called 3 times, i assume that console.log('link is tru'); is also called 3 times, so the problem is that the whole handleLink function is called 3 times before auth().signInWithEmailLink finishes.

Answer 2

I ran into the same issue here is the answer.
Email link Authentication has a longer expiration time (around 6 hours). If you'll create 2 or more sign in emails in a row, you should be able to login with the latest link being received. You'll also be able to receive an error message for example in iOS, "The action code is invalid. This can happen if the code is malformed, expired, or has already been used" when you clicked the older links.