initial commit (migrated)

lib/core/error/failure.dart

@@ -0,0 +1,28 @@
+import 'package:equatable/equatable.dart';
+
+/// Base class for all failures
+abstract class Failure extends Equatable {
+  /// Default constructor
+  const Failure({required this.message, this.cause});
+
+  /// Message of the failure
+  final String message;
+
+  /// Cause of the failure
+  final Exception? cause;
+
+  @override
+  List<Object?> get props => [message, cause];
+}
+
+class ClientFailure extends Failure {
+  const ClientFailure({required super.message, super.cause});
+}
+
+class ServerFailure extends Failure {
+  const ServerFailure({required super.message, super.cause});
+}
+
+class UnknownFailure extends Failure {
+  const UnknownFailure({required super.message, super.cause});
+}