базовая логика скачивания обновлений

lib/features/launcher/domain/entities/client_manifest.dart

@@ -0,0 +1,26 @@
+import 'client_hash_entry.dart';
+import 'client_manifest_file.dart';
+
+final class ClientManifest {
+  final List<ClientManifestFile> files;
+  final String buildHash;
+
+  const ClientManifest({required this.files, required this.buildHash});
+
+  factory ClientManifest.fromJson(Map<String, dynamic> json) {
+    final files =
+        ((json['files'] as List<dynamic>? ?? const <dynamic>[])
+                .whereType<Map<String, dynamic>>()
+                .map(ClientManifestFile.fromJson)
+                .toList())
+            .cast<ClientManifestFile>();
+
+    return ClientManifest(files: files, buildHash: computeBuildHash(files));
+  }
+
+  Map<String, ClientManifestFile> get filesByPath => {
+    for (final file in files) normalizeClientPath(file.path): file,
+  };
+
+  int get totalSize => files.fold(0, (sum, file) => sum + file.size);
+}