TRON -> TRON_MAINNET

frontend/pshared/lib/models/file/downloaded_file.dart

@@ -0,0 +1,11 @@
+class DownloadedFile {
+  final List<int> bytes;
+  final String filename;
+  final String mimeType;
+
+  const DownloadedFile({
+    required this.bytes,
+    required this.filename,
+    required this.mimeType,
+  });
+}