Add demo file and transfer simulation for App Store review

lib/transfer/demo_transfer.dart

@@ -0,0 +1,74 @@
+import 'dart:async';
+import 'dart:io';
+import 'package:flutter/services.dart';
+import '../src/rust/wormhole/types/t_update.dart';
+import '../src/rust/wormhole/types/events.dart';
+import '../src/rust/wormhole/types/value.dart';
+
+/// Generates a demo receive stream that simulates downloading a file
+/// without actually connecting to a wormhole server.
+/// This is used for App Store review demonstrations.
+Stream<TUpdate> generateDemoReceiveStream(String downloadPath) async* {
+  // Step 1: Connecting
+  yield const TUpdate(
+    event: Events.connecting,
+    value: Value.int(0),
+  );
+  await Future.delayed(const Duration(milliseconds: 800));
+
+  // Step 2: Start transfer
+  yield const TUpdate(
+    event: Events.startTransfer,
+    value: Value.int(0),
+  );
+  await Future.delayed(const Duration(milliseconds: 500));
+
+  // Step 3: Send total size (1MB demo file)
+  const int totalBytes = 1048576; // 1 MB
+  yield const TUpdate(
+    event: Events.total,
+    value: Value.int(totalBytes),
+  );
+  await Future.delayed(const Duration(milliseconds: 200));
+
+  // Step 4: Simulate progress in chunks
+  const int chunkSize = 131072; // 128 KB chunks
+  for (int sent = chunkSize; sent <= totalBytes; sent += chunkSize) {
+    final int bytesToSend = sent > totalBytes ? totalBytes : sent;
+    yield TUpdate(
+      event: Events.sent,
+      value: Value.int(bytesToSend),
+    );
+    await Future.delayed(const Duration(milliseconds: 100));
+  }
+
+  // Step 5: Copy demo file from assets to download path
+  // Load the demo file from assets
+  final ByteData data = await rootBundle.load('assets/demo/WormholeDemo.pdf');
+  final List<int> bytes = data.buffer.asUint8List();
+
+  // Create the destination file path
+  final String fileName = 'WormholeDemo.pdf';
+  String destinationPath = '$downloadPath${Platform.pathSeparator}$fileName';
+
+  // Handle file name conflicts (add number suffix if file exists)
+  int counter = 1;
+  while (File(destinationPath).existsSync()) {
+    destinationPath =
+        '$downloadPath${Platform.pathSeparator}WormholeDemo ($counter).pdf';
+    counter++;
+  }
+
+  // Write the file
+  final File file = File(destinationPath);
+  await file.writeAsBytes(bytes);
+  final finalPath = destinationPath;
+
+  await Future.delayed(const Duration(milliseconds: 300));
+
+  // Step 6: Finished
+  yield TUpdate(
+    event: Events.finished,
+    value: Value.string(finalPath),
+  );
+}

lib/transfer/transfer_receiver.dart

@@ -18,7 +18,9 @@ import '../pages/transfer_widgets/transfer_finished.dart';
 import '../settings/settings.dart';
 import '../utils/paths.dart';
 import '../utils/logger.dart';
+import '../utils/code.dart';
 import 'transfer_provider.dart';
+import 'demo_transfer.dart';
 
 class TransferReceiver extends StatefulWidget {
   const TransferReceiver({super.key, required this.child});
@@ -111,6 +113,21 @@ class _TransferReceiverState extends State<TransferReceiver> {
       return;
     }
 
+    // Check if this is a demo code for App Store review
+    if (isDemoCode(passphrase)) {
+      // Use demo transfer stream instead of real wormhole connection
+      final s = generateDemoReceiveStream(dpath);
+      if (!mounted) return;
+      Provider.of<NavigationProvider>(context, listen: false).push(
+        ConnectingPage(
+          key: UniqueKey(),
+          stream: s,
+          finish: (file) => ReceiveFinished(file: file),
+        ),
+      );
+      return;
+    }
+
     // we need storage permission to store files
     if (!(Platform.isAndroid || Platform.isIOS) ||
         (Platform.isAndroid &&

lib/utils/code.dart

@@ -1,6 +1,15 @@
 // regex to match code validity
 final RegExp _regex = RegExp(r'^\d+-[^\s]*$');
 
+/// Demo code for App Store review (simulates file transfer without server)
+const String demoCode =
+    '999763-demoooooo-mode-transfer-that-should-never-collide';
+
+/// Check if the provided code is the demo code
+bool isDemoCode(String code) {
+  return code == demoCode;
+}
+
 /// validate syntax of correction code
 bool isCodeValid(String code) {
   return _regex.hasMatch(code);

pubspec.yaml

@@ -70,6 +70,10 @@ flutter:
   # include material icons
   uses-material-design: true
 
+  # include demo assets for App Store review
+  assets:
+    - assets/demo/
+
 # app icon generation
 flutter_launcher_icons:
   android: "ic_launcher"