split signal functions into multiple files

lib/src/services/api.service.dart

@@ -21,14 +21,14 @@ import 'package:twonly/src/services/api/utils.dart';
 import 'package:twonly/src/services/api/media_received.dart';
 import 'package:twonly/src/services/api/media_send.dart';
 import 'package:twonly/src/services/api/server_messages.dart';
+import 'package:twonly/src/services/signal/identity.signal.dart';
+import 'package:twonly/src/services/signal/utils.signal.dart';
 import 'package:twonly/src/utils/hive.dart';
 import 'package:twonly/src/services/fcm.service.dart';
 import 'package:twonly/src/services/flame.service.dart';
 import 'package:twonly/src/utils/log.dart';
 import 'package:twonly/src/utils/misc.dart';
 import 'package:twonly/src/utils/storage.dart';
-// ignore: library_prefixes
-import 'package:twonly/src/utils/signal.dart' as SignalHelper;
 import 'package:web_socket_channel/io.dart';
 // ignore: implementation_imports
 import 'package:libsignal_protocol_dart/src/ecc/ed25519.dart';
@@ -306,7 +306,7 @@ class ApiService {
 
   Future authenticate() async {
     if (isAuthenticated) return;
-    if (await SignalHelper.getSignalIdentity() == null) {
+    if (await getSignalIdentity() == null) {
       return;
     }
 
@@ -329,7 +329,7 @@ class ApiService {
 
     final challenge = result.value.authchallenge;
 
-    final privKey = await SignalHelper.getPrivateKey();
+    final privKey = await getSignalPrivateIdentityKey();
     if (privKey == null) return;
     final random = getRandomUint8List(32);
     final signature = sign(privKey.serialize(), challenge, random);
@@ -358,13 +358,12 @@ class ApiService {
   }
 
   Future<Result> register(String username, String? inviteCode) async {
-    final signalIdentity = await SignalHelper.getSignalIdentity();
+    final signalIdentity = await getSignalIdentity();
     if (signalIdentity == null) {
       return Result.error(ErrorCode.InternalError);
     }
 
-    final signalStore =
-        await SignalHelper.getSignalStoreFromIdentity(signalIdentity);
+    final signalStore = await getSignalStoreFromIdentity(signalIdentity);
 
     final signedPreKey = (await signalStore.loadSignedPreKeys())[0];
 

lib/src/services/api/messages.dart

@@ -10,10 +10,9 @@ import 'package:twonly/src/database/tables/messages_table.dart';
 import 'package:twonly/src/model/json/message.dart';
 import 'package:twonly/src/model/json/userdata.dart';
 import 'package:twonly/src/services/api/utils.dart';
+import 'package:twonly/src/services/signal/encryption.signal.dart';
 import 'package:twonly/src/utils/hive.dart';
 import 'package:twonly/src/services/notification.service.dart';
-// ignore: library_prefixes
-import 'package:twonly/src/utils/signal.dart' as SignalHelper;
 import 'package:twonly/src/utils/storage.dart';
 
 final lockSendingMessages = Mutex();
@@ -138,7 +137,7 @@ Future<(String, RetransmitMessage)?> encryptMessage(
     {PushKind? pushKind}) async {
   return await lockSendingMessages
       .protect<(String, RetransmitMessage)?>(() async {
-    Uint8List? bytes = await SignalHelper.encryptMessage(msg, userId);
+    Uint8List? bytes = await signalEncryptMessage(userId, msg);
 
     if (bytes == null) {
       Logger("api.dart").shout("Error encryption message!");

lib/src/services/api/server_messages.dart

@@ -18,9 +18,9 @@ import 'package:twonly/src/services/api/messages.dart';
 import 'package:twonly/src/services/api/utils.dart';
 import 'package:twonly/src/services/api/media_received.dart';
 import 'package:twonly/src/services/notification.service.dart';
+import 'package:twonly/src/services/signal/encryption.signal.dart';
+import 'package:twonly/src/services/signal/utils.signal.dart';
 import 'package:twonly/src/utils/misc.dart';
-// ignore: library_prefixes
-import 'package:twonly/src/utils/signal.dart' as SignalHelper;
 
 final lockHandleServerMessage = Mutex();
 
@@ -53,7 +53,7 @@ Future handleServerMessage(server.ServerToClient msg) async {
 }
 
 Future<client.Response> handleNewMessage(int fromUserId, Uint8List body) async {
-  MessageJson? message = await SignalHelper.getDecryptedText(fromUserId, body);
+  MessageJson? message = await signalDecryptMessage(fromUserId, body);
   if (message == null) {
     Logger("server_messages")
         .info("Got invalid cipher text from $fromUserId. Deleting it.");
@@ -264,7 +264,7 @@ Future<client.Response> handleNewMessage(int fromUserId, Uint8List body) async {
 }
 
 Future<client.Response> handleRequestNewPreKey() async {
-  List<PreKeyRecord> localPreKeys = await SignalHelper.getPreKeys();
+  List<PreKeyRecord> localPreKeys = await signalGetPreKeys();
 
   List<client.Response_PreKey> prekeysList = [];
   for (int i = 0; i < localPreKeys.length; i++) {

lib/src/services/signal/encryption.signal.dart

@@ -0,0 +1,64 @@
+import 'dart:convert';
+import 'dart:io';
+import 'dart:typed_data';
+import 'package:libsignal_protocol_dart/libsignal_protocol_dart.dart';
+import 'package:logging/logging.dart';
+import 'package:twonly/src/model/json/message.dart';
+import 'package:twonly/src/database/signal/connect_signal_protocol_store.dart';
+import 'package:twonly/src/services/signal/utils.signal.dart';
+import 'package:twonly/src/utils/misc.dart';
+
+Future<Uint8List?> signalEncryptMessage(int target, MessageJson msg) async {
+  try {
+    ConnectSignalProtocolStore signalStore = (await getSignalStore())!;
+
+    SessionCipher session = SessionCipher.fromStore(
+        signalStore, SignalProtocolAddress(target.toString(), defaultDeviceId));
+
+    final ciphertext = await session.encrypt(
+        Uint8List.fromList(gzip.encode(utf8.encode(jsonEncode(msg.toJson())))));
+
+    var b = BytesBuilder();
+    b.add(ciphertext.serialize());
+    b.add(intToBytes(ciphertext.getType()));
+
+    return b.takeBytes();
+  } catch (e) {
+    Logger("utils/signal").shout(e.toString());
+    return null;
+  }
+}
+
+Future<MessageJson?> signalDecryptMessage(int source, Uint8List msg) async {
+  try {
+    ConnectSignalProtocolStore signalStore = (await getSignalStore())!;
+
+    SessionCipher session = SessionCipher.fromStore(
+        signalStore, SignalProtocolAddress(source.toString(), defaultDeviceId));
+
+    List<Uint8List>? msgs = removeLastXBytes(msg, 4);
+    if (msgs == null) {
+      Logger("utils/signal").shout("Message requires at least 4 bytes.");
+      return null;
+    }
+    Uint8List body = msgs[0];
+    int type = bytesToInt(msgs[1]);
+    Uint8List plaintext;
+    if (type == CiphertextMessage.prekeyType) {
+      PreKeySignalMessage pre = PreKeySignalMessage(body);
+      plaintext = await session.decrypt(pre);
+    } else if (type == CiphertextMessage.whisperType) {
+      SignalMessage signalMsg = SignalMessage.fromSerialized(body);
+      plaintext = await session.decryptFromSignal(signalMsg);
+    } else {
+      Logger("utils/signal").shout("Type not known: $type");
+      return null;
+    }
+    MessageJson dectext =
+        MessageJson.fromJson(jsonDecode(utf8.decode(gzip.decode(plaintext))));
+    return dectext;
+  } catch (e) {
+    Logger("utils/signal").shout(e.toString());
+    return null;
+  }
+}

lib/src/services/signal/identity.signal.dart

@@ -0,0 +1,62 @@
+import 'dart:convert';
+import 'package:flutter_secure_storage/flutter_secure_storage.dart';
+import 'package:libsignal_protocol_dart/libsignal_protocol_dart.dart';
+import 'package:logging/logging.dart';
+import 'package:twonly/src/model/json/signal_identity.dart';
+import 'package:twonly/src/database/signal/connect_signal_protocol_store.dart';
+
+const int defaultDeviceId = 1;
+
+Future<ECPrivateKey?> getSignalPrivateIdentityKey() async {
+  final signalIdentity = await getSignalIdentity();
+  if (signalIdentity == null) {
+    return null;
+  }
+
+  final IdentityKeyPair identityKeyPair =
+      IdentityKeyPair.fromSerialized(signalIdentity.identityKeyPairU8List);
+
+  return identityKeyPair.getPrivateKey();
+}
+
+Future<SignalIdentity?> getSignalIdentity() async {
+  try {
+    final storage = FlutterSecureStorage();
+    final signalIdentityJson = await storage.read(key: "signal_identity");
+    if (signalIdentityJson == null) {
+      return null;
+    }
+    return SignalIdentity.fromJson(jsonDecode(signalIdentityJson));
+  } catch (e) {
+    Logger("signal.dart/getSignalIdentity").shout(e);
+    return null;
+  }
+}
+
+Future createIfNotExistsSignalIdentity() async {
+  final storage = FlutterSecureStorage();
+
+  final signalIdentity = await storage.read(key: "signal_identity");
+  if (signalIdentity != null) {
+    return;
+  }
+
+  final identityKeyPair = generateIdentityKeyPair();
+  final registrationId = generateRegistrationId(true);
+
+  ConnectSignalProtocolStore signalStore =
+      ConnectSignalProtocolStore(identityKeyPair, registrationId);
+
+  final signedPreKey = generateSignedPreKey(identityKeyPair, defaultDeviceId);
+
+  await signalStore.signedPreKeyStore
+      .storeSignedPreKey(signedPreKey.id, signedPreKey);
+
+  final storedSignalIdentity = SignalIdentity(
+    identityKeyPairU8List: identityKeyPair.serialize(),
+    registrationId: registrationId,
+  );
+
+  await storage.write(
+      key: "signal_identity", value: jsonEncode(storedSignalIdentity));
+}

lib/src/services/signal/session.signal.dart

@@ -0,0 +1,92 @@
+import 'dart:typed_data';
+import 'package:libsignal_protocol_dart/libsignal_protocol_dart.dart';
+import 'package:twonly/src/model/json/userdata.dart';
+import 'package:twonly/src/model/protobuf/api/server_to_client.pb.dart';
+import 'package:twonly/src/database/signal/connect_signal_protocol_store.dart';
+import 'package:twonly/src/services/signal/utils.signal.dart';
+import 'package:twonly/src/utils/log.dart';
+import 'package:twonly/src/utils/storage.dart';
+
+const int defaultDeviceId = 1;
+
+Future<bool> createNewSignalSession(Response_UserData userData) async {
+  final int userId = userData.userId.toInt();
+
+  SignalProtocolAddress targetAddress =
+      SignalProtocolAddress(userId.toString(), defaultDeviceId);
+
+  SignalProtocolStore? signalStore = await getSignalStore();
+  if (signalStore == null) {
+    return false;
+  }
+
+  SessionBuilder sessionBuilder =
+      SessionBuilder.fromSignalStore(signalStore, targetAddress);
+
+  ECPublicKey? tempPrePublicKey;
+  int? tempPreKeyId;
+  if (userData.prekeys.isNotEmpty) {
+    tempPrePublicKey = Curve.decodePoint(
+        DjbECPublicKey(Uint8List.fromList(userData.prekeys.first.prekey))
+            .serialize(),
+        1);
+    tempPreKeyId = userData.prekeys.first.id.toInt();
+  }
+
+  int tempSignedPreKeyId = userData.signedPrekeyId.toInt();
+
+  ECPublicKey? tempSignedPreKeyPublic = Curve.decodePoint(
+      DjbECPublicKey(Uint8List.fromList(userData.signedPrekey)).serialize(), 1);
+
+  Uint8List? tempSignedPreKeySignature =
+      Uint8List.fromList(userData.signedPrekeySignature);
+
+  IdentityKey tempIdentityKey = IdentityKey(Curve.decodePoint(
+      DjbECPublicKey(Uint8List.fromList(userData.publicIdentityKey))
+          .serialize(),
+      1));
+
+  PreKeyBundle preKeyBundle = PreKeyBundle(
+    userData.userId.toInt(),
+    1,
+    tempPreKeyId,
+    tempPrePublicKey,
+    tempSignedPreKeyId,
+    tempSignedPreKeyPublic,
+    tempSignedPreKeySignature,
+    tempIdentityKey,
+  );
+
+  try {
+    await sessionBuilder.processPreKeyBundle(preKeyBundle);
+    return true;
+  } catch (e) {
+    Log.error("could not process pre key bundle: $e");
+    return false;
+  }
+}
+
+Future<Fingerprint?> generateSessionFingerPrint(int target) async {
+  ConnectSignalProtocolStore? signalStore = await getSignalStore();
+  UserData? user = await getUser();
+  if (signalStore == null || user == null) return null;
+  try {
+    IdentityKey? targetIdentity = await signalStore
+        .getIdentity(SignalProtocolAddress(target.toString(), defaultDeviceId));
+    if (targetIdentity != null) {
+      final generator = NumericFingerprintGenerator(5200);
+      final localFingerprint = generator.createFor(
+        1,
+        Uint8List.fromList([user.userId.toInt()]),
+        (await signalStore.getIdentityKeyPair()).getPublicKey(),
+        Uint8List.fromList([target.toInt()]),
+        targetIdentity,
+      );
+
+      return localFingerprint;
+    }
+    return null;
+  } catch (e) {
+    return null;
+  }
+}

lib/src/services/signal/utils.signal.dart

@@ -0,0 +1,29 @@
+import 'package:libsignal_protocol_dart/libsignal_protocol_dart.dart';
+import 'package:twonly/src/model/json/signal_identity.dart';
+import 'package:twonly/src/database/signal/connect_signal_protocol_store.dart';
+import 'package:twonly/src/services/signal/identity.signal.dart';
+
+const int defaultDeviceId = 1;
+
+Future<ConnectSignalProtocolStore?> getSignalStore() async {
+  return await getSignalStoreFromIdentity((await getSignalIdentity())!);
+}
+
+Future<ConnectSignalProtocolStore> getSignalStoreFromIdentity(
+    SignalIdentity signalIdentity) async {
+  final IdentityKeyPair identityKeyPair =
+      IdentityKeyPair.fromSerialized(signalIdentity.identityKeyPairU8List);
+
+  return ConnectSignalProtocolStore(
+      identityKeyPair, signalIdentity.registrationId.toInt());
+}
+
+Future<List<PreKeyRecord>> signalGetPreKeys() async {
+  final preKeys = generatePreKeys(0, 200);
+  final signalStore = await getSignalStore();
+  if (signalStore == null) return [];
+  for (final p in preKeys) {
+    await signalStore.preKeyStore.storePreKey(p.id, p);
+  }
+  return preKeys;
+}

lib/src/utils/signal.dart

@@ -1,229 +0,0 @@
-import 'dart:convert';
-import 'dart:io';
-import 'dart:typed_data';
-import 'package:flutter_secure_storage/flutter_secure_storage.dart';
-import 'package:libsignal_protocol_dart/libsignal_protocol_dart.dart';
-import 'package:logging/logging.dart';
-import 'package:twonly/src/model/json/message.dart';
-import 'package:twonly/src/model/json/signal_identity.dart';
-import 'package:twonly/src/model/json/userdata.dart';
-import 'package:twonly/src/model/protobuf/api/server_to_client.pb.dart';
-import 'package:twonly/src/database/signal/connect_signal_protocol_store.dart';
-import 'package:twonly/src/utils/misc.dart';
-import 'package:twonly/src/utils/storage.dart';
-
-const int defaultDeviceId = 1;
-
-Future<ECPrivateKey?> getPrivateKey() async {
-  final signalIdentity = await getSignalIdentity();
-  if (signalIdentity == null) {
-    return null;
-  }
-
-  final IdentityKeyPair identityKeyPair =
-      IdentityKeyPair.fromSerialized(signalIdentity.identityKeyPairU8List);
-
-  return identityKeyPair.getPrivateKey();
-}
-
-Future<bool> addNewContact(Response_UserData userData) async {
-  final int userId = userData.userId.toInt();
-
-  SignalProtocolAddress targetAddress =
-      SignalProtocolAddress(userId.toString(), defaultDeviceId);
-
-  SignalProtocolStore? signalStore = await getSignalStore();
-  if (signalStore == null) {
-    return false;
-  }
-
-  SessionBuilder sessionBuilder =
-      SessionBuilder.fromSignalStore(signalStore, targetAddress);
-
-  ECPublicKey? tempPrePublicKey;
-  int? tempPreKeyId;
-  if (userData.prekeys.isNotEmpty) {
-    tempPrePublicKey = Curve.decodePoint(
-        DjbECPublicKey(Uint8List.fromList(userData.prekeys.first.prekey))
-            .serialize(),
-        1);
-    tempPreKeyId = userData.prekeys.first.id.toInt();
-  }
-
-  int tempSignedPreKeyId = userData.signedPrekeyId.toInt();
-
-  ECPublicKey? tempSignedPreKeyPublic = Curve.decodePoint(
-      DjbECPublicKey(Uint8List.fromList(userData.signedPrekey)).serialize(), 1);
-
-  Uint8List? tempSignedPreKeySignature =
-      Uint8List.fromList(userData.signedPrekeySignature);
-
-  IdentityKey tempIdentityKey = IdentityKey(Curve.decodePoint(
-      DjbECPublicKey(Uint8List.fromList(userData.publicIdentityKey))
-          .serialize(),
-      1));
-
-  PreKeyBundle preKeyBundle = PreKeyBundle(
-    userData.userId.toInt(),
-    1,
-    tempPreKeyId,
-    tempPrePublicKey,
-    tempSignedPreKeyId,
-    tempSignedPreKeyPublic,
-    tempSignedPreKeySignature,
-    tempIdentityKey,
-  );
-
-  try {
-    await sessionBuilder.processPreKeyBundle(preKeyBundle);
-    return true;
-  } catch (e) {
-    Logger("signal_helper").shout("Error: $e");
-    return false;
-  }
-}
-
-Future<ConnectSignalProtocolStore?> getSignalStore() async {
-  return await getSignalStoreFromIdentity((await getSignalIdentity())!);
-}
-
-Future<SignalIdentity?> getSignalIdentity() async {
-  try {
-    final storage = FlutterSecureStorage();
-    final signalIdentityJson = await storage.read(key: "signal_identity");
-    if (signalIdentityJson == null) {
-      return null;
-    }
-    return SignalIdentity.fromJson(jsonDecode(signalIdentityJson));
-  } catch (e) {
-    Logger("signal.dart/getSignalIdentity").shout(e);
-    return null;
-  }
-}
-
-Future<ConnectSignalProtocolStore> getSignalStoreFromIdentity(
-    SignalIdentity signalIdentity) async {
-  final IdentityKeyPair identityKeyPair =
-      IdentityKeyPair.fromSerialized(signalIdentity.identityKeyPairU8List);
-
-  return ConnectSignalProtocolStore(
-      identityKeyPair, signalIdentity.registrationId.toInt());
-}
-
-Future<List<PreKeyRecord>> getPreKeys() async {
-  final preKeys = generatePreKeys(0, 200);
-  final signalStore = await getSignalStore();
-  if (signalStore == null) return [];
-  for (final p in preKeys) {
-    await signalStore.preKeyStore.storePreKey(p.id, p);
-  }
-  return preKeys;
-}
-
-Future createIfNotExistsSignalIdentity() async {
-  final storage = FlutterSecureStorage();
-
-  final signalIdentity = await storage.read(key: "signal_identity");
-  if (signalIdentity != null) {
-    return;
-  }
-
-  final identityKeyPair = generateIdentityKeyPair();
-  final registrationId = generateRegistrationId(true);
-
-  ConnectSignalProtocolStore signalStore =
-      ConnectSignalProtocolStore(identityKeyPair, registrationId);
-
-  final signedPreKey = generateSignedPreKey(identityKeyPair, defaultDeviceId);
-
-  await signalStore.signedPreKeyStore
-      .storeSignedPreKey(signedPreKey.id, signedPreKey);
-
-  final storedSignalIdentity = SignalIdentity(
-    identityKeyPairU8List: identityKeyPair.serialize(),
-    registrationId: registrationId,
-  );
-
-  await storage.write(
-      key: "signal_identity", value: jsonEncode(storedSignalIdentity));
-}
-
-Future<Fingerprint?> generateSessionFingerPrint(int target) async {
-  ConnectSignalProtocolStore? signalStore = await getSignalStore();
-  UserData? user = await getUser();
-  if (signalStore == null || user == null) return null;
-  try {
-    IdentityKey? targetIdentity = await signalStore
-        .getIdentity(SignalProtocolAddress(target.toString(), defaultDeviceId));
-    if (targetIdentity != null) {
-      final generator = NumericFingerprintGenerator(5200);
-      final localFingerprint = generator.createFor(
-        1,
-        Uint8List.fromList([user.userId.toInt()]),
-        (await signalStore.getIdentityKeyPair()).getPublicKey(),
-        Uint8List.fromList([target.toInt()]),
-        targetIdentity,
-      );
-
-      return localFingerprint;
-    }
-    return null;
-  } catch (e) {
-    return null;
-  }
-}
-
-Future<Uint8List?> encryptMessage(MessageJson msg, int target) async {
-  try {
-    ConnectSignalProtocolStore signalStore = (await getSignalStore())!;
-
-    SessionCipher session = SessionCipher.fromStore(
-        signalStore, SignalProtocolAddress(target.toString(), defaultDeviceId));
-
-    final ciphertext = await session.encrypt(
-        Uint8List.fromList(gzip.encode(utf8.encode(jsonEncode(msg.toJson())))));
-
-    var b = BytesBuilder();
-    b.add(ciphertext.serialize());
-    b.add(intToBytes(ciphertext.getType()));
-
-    return b.takeBytes();
-  } catch (e) {
-    Logger("utils/signal").shout(e.toString());
-    return null;
-  }
-}
-
-Future<MessageJson?> getDecryptedText(int source, Uint8List msg) async {
-  try {
-    ConnectSignalProtocolStore signalStore = (await getSignalStore())!;
-
-    SessionCipher session = SessionCipher.fromStore(
-        signalStore, SignalProtocolAddress(source.toString(), defaultDeviceId));
-
-    List<Uint8List>? msgs = removeLastXBytes(msg, 4);
-    if (msgs == null) {
-      Logger("utils/signal").shout("Message requires at least 4 bytes.");
-      return null;
-    }
-    Uint8List body = msgs[0];
-    int type = bytesToInt(msgs[1]);
-    Uint8List plaintext;
-    if (type == CiphertextMessage.prekeyType) {
-      PreKeySignalMessage pre = PreKeySignalMessage(body);
-      plaintext = await session.decrypt(pre);
-    } else if (type == CiphertextMessage.whisperType) {
-      SignalMessage signalMsg = SignalMessage.fromSerialized(body);
-      plaintext = await session.decryptFromSignal(signalMsg);
-    } else {
-      Logger("utils/signal").shout("Type not known: $type");
-      return null;
-    }
-    MessageJson dectext =
-        MessageJson.fromJson(jsonDecode(utf8.decode(gzip.decode(plaintext))));
-    return dectext;
-  } catch (e) {
-    Logger("utils/signal").shout(e.toString());
-    return null;
-  }
-}

lib/src/views/chats/add_new_user.view.dart

@@ -17,7 +17,7 @@ import 'package:twonly/src/views/components/initialsavatar.dart';
 import 'package:twonly/src/model/json/message.dart';
 import 'package:twonly/src/services/api/messages.dart';
 // ignore: library_prefixes
-import 'package:twonly/src/utils/signal.dart' as SignalHelper;
+import 'package:twonly/src/services/signal/utils.signal.dart' as SignalHelper;
 import 'package:twonly/src/utils/storage.dart';
 import 'package:twonly/src/views/settings/subscription/subscription_view.dart';
 

lib/src/views/contact/contact_verify.view.dart

@@ -9,7 +9,7 @@ import 'package:flutter/material.dart';
 import 'package:twonly/src/database/daos/contacts_dao.dart';
 import 'package:twonly/src/database/twonly_database.dart';
 import 'package:twonly/src/utils/misc.dart';
-import 'package:twonly/src/utils/signal.dart';
+import 'package:twonly/src/services/signal/utils.signal.dart';
 import 'package:url_launcher/url_launcher.dart';
 
 class ContactVerifyView extends StatefulWidget {

lib/src/views/register.view.dart

@@ -5,10 +5,10 @@ import 'package:logging/logging.dart';
 import 'package:twonly/globals.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
+import 'package:twonly/src/services/signal/identity.signal.dart';
 import 'package:twonly/src/views/components/alert_dialog.dart';
 import 'package:twonly/src/model/json/userdata.dart';
 import 'package:twonly/src/utils/misc.dart';
-import 'package:twonly/src/utils/signal.dart';
 
 class RegisterView extends StatefulWidget {
   const RegisterView({super.key, required this.callbackOnSuccess});