save method

@override Future<Result<void, DomainFailure>> save(Policy policy)

Persists policy to the underlying storage.

Returns Ok<void> on success or Err<StorageFailure> on failure.

Implementation

@override
Future<Result<void, DomainFailure>> save(Policy policy) async {
  try {
    final json = _codec.encode(policy);
    await _prefs.setString(storageKey, json);
    return const Ok(null);
  } catch (e) {
    return Err(
      StorageFailure('Failed to save policies: $e', cause: e),
    );
  }
}