nc-photos/lib/platform/universal_storage.dart

import 'dart:typed_data';

/// Store simple contents across different platforms
///
/// On mobile, the contents will be persisted as a file. On web, the contents
/// will be stored in local storage
abstract class UniversalStorage {
  Future<void> putBinary(String name, Uint8List content);

  /// Return the content associated with [name], or null if no such association
  /// exists
  Future<Uint8List> getBinary(String name);

  Future<void> putString(String name, String content);

  /// Return the string associated with [name], or null if no such association
  /// exists
  Future<String> getString(String name);

  Future<void> remove(String name);
}