flutter app is unable to ineract with firebase cloud database

Question

i have set my firebase cloud database rule to default

rules_version = '2';
service cloud.firestore {
  match /databases/{database}/documents {
    match /{document=**} {
      allow read, write: if false;
    }
  }
}

but while my flutter app tries to interact with it, this error occurs

Error performing get, PERMISSION_DENIED: Missing or insufficient permissions., null

Answer 1

This condition:

rules_version = '2';
service cloud.firestore {
  match /databases/{database}/documents {
    match /{document=**} {
      allow read, write: if false;
    }
  }
}

means you are disallowing both read and write from and to firestore, you can change the rules to the following:

rules_version = '2';
service cloud.firestore {
  match /databases/{database}/documents {
    match /{document=**} {
      allow read : if true; 
      allow write: if false;
    }
  }
}

Which will allow you to read but not write to the database, or you can use the following:

rules_version = '2';
service cloud.firestore {
  match /databases/{database}/documents {
    match /{document=**} {
      allow read, write: if request.time < timestamp.date(2020, 9, 20);
    }
  }
}

Use the above rules just for testing, check here:

https://firebase.google.com/docs/firestore/security/rules-structure