firebase - Restricting Cloud Firestore to a specific domain

Question

Is there a way to restrict Cloud Firestore (for hosting/web) to do CRUD operations with restrictions to one domain only, say xyz.com?

For example, the rule below locks read, update, delete without authorisation but you can still write things to the database.

service cloud.firestore {
  match /databases/{database}/documents {
    match /coming-soon-email-ids/{document=**} {
      allow write;
      allow read, update, delete: if request.auth.uid == !null;
    }
  }
}

Or do I have to integrate Google's firewall in it?

Answer 1

Waitting for answers