From ad8dea4fbf6bffe30b415350cf378f65c198029a Mon Sep 17 00:00:00 2001
From: otsmr <git@tsmr.eu>
Date: Fri, 18 Jul 2025 21:59:11 +0200
Subject: [PATCH] fixes combine list array

---
 .github/workflows/release_github.yml   |  2 +-
 lib/src/services/api/media_upload.dart |  4 +++-
 lib/src/utils/pow.dart                 | 19 +++++++++++++++++++
 test/unit_test.dart                    | 24 +++++++++++++++++++++++-
 4 files changed, 46 insertions(+), 3 deletions(-)
 create mode 100644 lib/src/utils/pow.dart

diff --git a/.github/workflows/release_github.yml b/.github/workflows/release_github.yml
index 43e5836..03a0e67 100644
--- a/.github/workflows/release_github.yml
+++ b/.github/workflows/release_github.yml
@@ -36,7 +36,7 @@ jobs:
           echo "storePassword=${{ secrets.STORE_PASSWORD }}" >> ./android/key.properties
           echo "keyPassword=${{ secrets.STORE_PASSWORD }}" >> ./android/key.properties
           echo "keyAlias=androidreleasekey" >> key.properties
-          echo "storeFile=./android/app/keystore.jks" >> ./android/key.properties
+          echo "storeFile=./keystore.jks" >> ./android/key.properties
 
       - name: Create keystore file
         env:
diff --git a/lib/src/services/api/media_upload.dart b/lib/src/services/api/media_upload.dart
index 1285929..5b2293b 100644
--- a/lib/src/services/api/media_upload.dart
+++ b/lib/src/services/api/media_upload.dart
@@ -824,7 +824,9 @@ Future<String> getMediaBaseFilePath(String type) async {
 /// combines two utf8 list
 Uint8List combineUint8Lists(Uint8List list1, Uint8List list2) {
   final combinedLength = 4 + list1.length + list2.length;
-  final combinedList = Uint8List(combinedLength)
+  final combinedList = Uint8List(combinedLength);
+  ByteData.sublistView(combinedList).setInt32(0, list1.length);
+  combinedList
     ..setRange(4, 4 + list1.length, list1)
     ..setRange(4 + list1.length, combinedLength, list2);
   return combinedList;
diff --git a/lib/src/utils/pow.dart b/lib/src/utils/pow.dart
new file mode 100644
index 0000000..67d2ebe
--- /dev/null
+++ b/lib/src/utils/pow.dart
@@ -0,0 +1,19 @@
+import 'package:cryptography_plus/cryptography_plus.dart';
+import 'package:drift/drift.dart';
+
+bool isValid(int difficulty, List<int> digest) {
+  final bits = digest.map((i) => i.toRadixString(2).padLeft(8, '0')).join();
+  return bits.startsWith('0' * difficulty);
+}
+
+Future<int> calculatePoW(Uint8List prefix, int difficulty) async {
+  var i = 0;
+  while (true) {
+    i++;
+    final s = '$prefix$i';
+    final digest = (await Sha256().hash(s.codeUnits)).bytes;
+    if (isValid(difficulty, digest)) {
+      return i;
+    }
+  }
+}
diff --git a/test/unit_test.dart b/test/unit_test.dart
index bff97e1..b37a39f 100644
--- a/test/unit_test.dart
+++ b/test/unit_test.dart
@@ -1,13 +1,35 @@
+import 'dart:typed_data';
+
 import 'package:flutter_test/flutter_test.dart';
+import 'package:twonly/src/services/api/media_upload.dart';
+import 'package:twonly/src/utils/pow.dart';
 import 'package:twonly/src/views/components/animate_icon.dart';
 
 void main() {
-  group('isEmoji', () {
+  group('testing utils', () {
     test('test isEmoji function', () {
       expect(isEmoji('Hallo'), false);
       expect(isEmoji('😂'), true);
       expect(isEmoji('😂😂'), false);
       expect(isEmoji('Hallo 😂'), false);
     });
+
+    test('test proof-of-work simple', () async {
+      expect(await calculatePoW(Uint8List.fromList([41, 41, 41, 41]), 6), 33);
+    });
+
+    test('test utils', () async {
+      final list1 = Uint8List.fromList([41, 41, 41, 41, 41, 41, 41]);
+      final list2 = Uint8List.fromList([42, 42, 42]);
+      final combined = combineUint8Lists(list1, list2);
+      final lists = extractUint8Lists(combined);
+      expect(list1, lists[0]);
+      expect(list2, lists[1]);
+    });
+
+    test('encode hex', () async {
+      final list1 = Uint8List.fromList([41, 41, 41, 41, 41, 41, 41]);
+      expect(list1, hexToUint8List(uint8ListToHex(list1)));
+    });
   });
 }