fixes combine list array

.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:

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;

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;
+    }
+  }
+}

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)));
+    });
   });
 }