making a folder public in Firebase Storage

Question

i need to set a folder public with only read permisions in firebase storage, my security rules are

service firebase.storage {
  match /b/{bucket}/o {
    match /{allPaths=**} {
      allow read, write:if request.auth.uid != null;
    }
    match /{platos=**} {
      allow read;
    }
  }
}

the folder is called platos and im not sure if those rules are secured the others folders must have protection only for logued users

Answer 1

The first rule should concern your folder, because otherwise the first rule is applied which rejects reads:

rules_version = '2';
service firebase.storage {
  match /b/{bucket}/o {
    match /platos/{allPaths=**} {
        allow read;
        allow write: if request.auth != null;
    }
    match /{allPaths=**} {
      allow read, write: if request.auth != null;
    }
  }
}