firebase-ios-sdk/Example/FirestoreSample/firestore.rules

service cloud.firestore {
  match /databases/{database}/documents {
    match /{document=**} {
      // This rule allows anyone with your database reference to view, edit,
      // and delete all data in your database. It is useful for getting
      // started, but it is configured to expire after 30 days because it
      // leaves your app open to attackers. At that time, all client
      // requests to your database will be denied.
      //
      // Make sure to write security rules for your app before that time, or
      // else all client requests to your database will be denied until you
      // update your rules.
      allow read, write: if request.time < timestamp.date(2022, 9, 2);
    }
  }
}