diff --git a/cyberwow/lib/controller/helper.dart b/cyberwow/lib/controller/helper.dart
index e817faa..9513d25 100644
--- a/cyberwow/lib/controller/helper.dart
+++ b/cyberwow/lib/controller/helper.dart
@@ -25,12 +25,12 @@ import 'dart:io';
 import 'package:path_provider/path_provider.dart';
 import 'package:flutter/foundation.dart';
 
-Future<String> getBinaryPath(String name) async {
+Future<String> getBinaryPath(final String name) async {
   final tmpDir = await getTemporaryDirectory();
   return tmpDir.path + '/' + name;
 }
 
-Future<bool> binaryExists(String name) async {
+Future<bool> binaryExists(final String name) async {
   final binPath = await getBinaryPath(name);
   return new File(binPath).exists();
 }
diff --git a/cyberwow/lib/controller/process/deploy.dart b/cyberwow/lib/controller/process/deploy.dart
index e5b84ac..180d421 100644
--- a/cyberwow/lib/controller/process/deploy.dart
+++ b/cyberwow/lib/controller/process/deploy.dart
@@ -27,7 +27,12 @@ import 'package:flutter/services.dart';
 
 import '../helper.dart';
 
-Stream<String> deployBinary (AssetBundle bundle, String path, String name) async* {
+Stream<String> deployBinary
+(
+  final AssetBundle bundle,
+  final String path,
+  final String name
+) async* {
   final binData = await bundle.load(path);
   final newPath = await getBinaryPath(name);
 
diff --git a/cyberwow/lib/controller/process/run.dart b/cyberwow/lib/controller/process/run.dart
index 68a9a53..651de52 100644
--- a/cyberwow/lib/controller/process/run.dart
+++ b/cyberwow/lib/controller/process/run.dart
@@ -30,7 +30,7 @@ import '../helper.dart';
 import '../../config.dart' as config;
 import '../../logging.dart';
 
-Stream<String> runBinary (String name, {Stream<String> input}) async* {
+Stream<String> runBinary (final String name, {final Stream<String> input}) async* {
   final newPath = await getBinaryPath(name);
 
   final appDocDir = await getApplicationDocumentsDirectory();
diff --git a/cyberwow/lib/controller/refresh.dart b/cyberwow/lib/controller/refresh.dart
index 967ebba..9b9ed5f 100644
--- a/cyberwow/lib/controller/refresh.dart
+++ b/cyberwow/lib/controller/refresh.dart
@@ -30,7 +30,7 @@ import '../logging.dart';
 
 typedef GetNotificationFunc = AppLifecycleState Function();
 
-Stream<Null> pull(GetNotificationFunc getNotification, String puller) async* {
+Stream<Null> pull(GetNotificationFunc getNotification, final String puller) async* {
   while (true) {
     final _appState = getNotification();
     log.finer('refresh pull by ${puller}: app state: ${_appState}');
diff --git a/cyberwow/lib/controller/rpc/rpc.dart b/cyberwow/lib/controller/rpc/rpc.dart
index 5b4479a..9d0aa02 100644
--- a/cyberwow/lib/controller/rpc/rpc.dart
+++ b/cyberwow/lib/controller/rpc/rpc.dart
@@ -31,7 +31,7 @@ import '../../logging.dart';
 
 int rpcID = 0;
 
-Future<http.Response> rpcHTTP(String method) async {
+Future<http.Response> rpcHTTP(final String method) async {
   final url = 'http://${config.host}:${config.c.port}/json_rpc';
 
   rpcID += 1;
@@ -58,9 +58,9 @@ Future<http.Response> rpcHTTP(String method) async {
   }
 }
 
-dynamic jsonDecode(String responseBody) => json.decode(responseBody);
+dynamic jsonDecode(final String responseBody) => json.decode(responseBody);
 
-Future<dynamic> rpc(String method, {String field}) async {
+Future<dynamic> rpc(final String method, {final String field}) async {
   final response = await rpcHTTP(method);
 
   if (response == null) return null;
@@ -76,7 +76,7 @@ Future<dynamic> rpc(String method, {String field}) async {
   }
 }
 
-Future<String> rpcString(String method, {String field}) async {
+Future<String> rpcString(final String method, {final String field}) async {
   final _field = await rpc(method, field: field);
   return pretty(_field);
 }
diff --git a/cyberwow/lib/controller/rpc/rpc2.dart b/cyberwow/lib/controller/rpc/rpc2.dart
index 19d178a..bda786d 100644
--- a/cyberwow/lib/controller/rpc/rpc2.dart
+++ b/cyberwow/lib/controller/rpc/rpc2.dart
@@ -29,7 +29,7 @@ import '../../config.dart' as config;
 import '../../helper.dart';
 import '../../logging.dart';
 
-Future<http.Response> rpc2(String method) async {
+Future<http.Response> rpc2(final String method) async {
   final url = 'http://${config.host}:${config.c.port}/${method}';
 
   try {
@@ -44,9 +44,9 @@ Future<http.Response> rpc2(String method) async {
   }
 }
 
-dynamic jsonDecode(String responseBody) => json.decode(responseBody);
+dynamic jsonDecode(final String responseBody) => json.decode(responseBody);
 
-Future<String> rpc2String(String method, {String field}) async {
+Future<String> rpc2String(final String method, {final String field}) async {
   final response = await rpc2(method);
 
   if (response == null) return '';
diff --git a/cyberwow/lib/main.dart b/cyberwow/lib/main.dart
index c621f6b..d4a5087 100644
--- a/cyberwow/lib/main.dart
+++ b/cyberwow/lib/main.dart
@@ -110,11 +110,11 @@ class _CyberWOW_PageState extends State<CyberWOW_Page> with WidgetsBindingObserv
   }
 
 
-  void _updateLoading(LoadingState state, String msg) {
+  void _updateLoading(LoadingState state, final String msg) {
     log.fine('updateLoading: ' + msg);
   }
 
-  Future<void> buildStateMachine(BlankState _blankState) async {
+  Future<void> buildStateMachine(final BlankState _blankState) async {
     final loadingText = config.c.splash;
     LoadingState _loadingState = await _blankState.next(loadingText);
 
@@ -180,7 +180,7 @@ class _CyberWOW_PageState extends State<CyberWOW_Page> with WidgetsBindingObserv
 
     SystemChrome.setEnabledSystemUIOverlays([SystemUiOverlay.bottom]);
 
-    BlankState _blankState = BlankState(_setState, _getNotification, _isExiting);
+    final BlankState _blankState = BlankState(_setState, _getNotification, _isExiting);
     _state = _blankState;
 
     buildStateMachine(_blankState);
@@ -202,7 +202,7 @@ class _CyberWOW_PageState extends State<CyberWOW_Page> with WidgetsBindingObserv
 
   @override
   Widget build(BuildContext context) {
-    return new WillPopScope
+    return WillPopScope
     (
       onWillPop: () => _exitApp(context),
       child: _state.use
diff --git a/cyberwow/lib/state.dart b/cyberwow/lib/state.dart
index 1c65775..b6e2dc3 100644
--- a/cyberwow/lib/state.dart
+++ b/cyberwow/lib/state.dart
@@ -100,12 +100,12 @@ class BlankState extends HookedState {
 }
 
 class LoadingState extends HookedState {
-  String banner;
+  final String banner;
   String status = '';
 
   LoadingState(f1, f2, f3, this.banner) : super (f1, f2, f3);
 
-  void append(String msg) {
+  void append(final String msg) {
     this.status += msg;
     syncState();
   }
@@ -149,12 +149,13 @@ class LoadingState extends HookedState {
 }
 
 class SyncingState extends HookedState {
-  Queue<String> stdout = Queue();
+  final Queue<String> stdout = Queue();
+
   bool synced = false;
 
   SyncingState(f1, f2, f3) : super (f1, f2, f3);
 
-  void append(String msg) {
+  void append(final String msg) {
     stdout.addLast(msg);
     while (stdout.length > config.stdoutLineBufferSize) {
       stdout.removeFirst();
@@ -225,20 +226,19 @@ class SyncingState extends HookedState {
 }
 
 class SyncedState extends HookedState {
-  Queue<String> stdout;
+  final Queue<String> stdout;
+  final StreamSink<String> processInput;
+  final Stream<String> processOutput;
+  final TextEditingController textController = TextEditingController();
+
   int height;
-  StreamSink<String> processInput;
-  Stream<String> processOutput;
   bool synced = true;
   bool connected = true;
   Map<String, dynamic> getInfo = {};
-  String syncInfo = 'syncInfo';
   List<dynamic> getConnections = [];
   List<dynamic> getTransactionPool = [];
   int pageIndex;
-
-  final FocusNode focusNode = FocusNode();
-  final TextEditingController textController = TextEditingController();
+  String syncInfo = 'syncInfo';
   PageController pageController;
 
   SyncedState(f1, f2, f3, this.stdout, this.processInput, this.processOutput, this.pageIndex)
@@ -246,12 +246,12 @@ class SyncedState extends HookedState {
     pageController = PageController( initialPage: pageIndex );
   }
 
-  void appendInput(String line) {
+  void appendInput(final String line) {
     stdout.addLast('> ' + line + '\n');
     processInput.add(line);
   }
 
-  void append(String msg) {
+  void append(final String msg) {
     stdout.addLast(msg);
     while (stdout.length > config.stdoutLineBufferSize) {
       stdout.removeFirst();
@@ -293,7 +293,6 @@ class SyncedState extends HookedState {
         height = await rpc.height();
         connected = await daemon.isConnected();
         getInfo = await rpc.getInfoSimple();
-        // syncInfo = await rpc.syncInfoString();
         getConnections = await rpc.getConnectionsSimple();
         // getTransactionPool = await rpc.getTransactionPoolString();
 
@@ -328,16 +327,17 @@ class SyncedState extends HookedState {
 
 
 class ReSyncingState extends HookedState {
-  Queue<String> stdout;
-  StreamSink<String> processInput;
-  Stream<String> processOutput;
-  bool synced = false;
+  final Queue<String> stdout;
+  final StreamSink<String> processInput;
+  final Stream<String> processOutput;
   final int pageIndex;
 
+  bool synced = false;
+
   ReSyncingState(f1, f2, f3, this.stdout, this.processInput, this.processOutput, this.pageIndex)
     : super (f1, f2, f3);
 
-  void append(String msg) {
+  void append(final String msg) {
     stdout.addLast(msg);
     while (stdout.length > config.stdoutLineBufferSize) {
       stdout.removeFirst();
@@ -394,12 +394,12 @@ class ReSyncingState extends HookedState {
 }
 
 class ExitingState extends HookedState {
-  Queue<String> stdout;
-  Stream<String> processOutput;
+  final Queue<String> stdout;
+  final Stream<String> processOutput;
 
   ExitingState(f1, f2, f3, this.stdout, this.processOutput) : super (f1, f2, f3);
 
-  void append(String msg) {
+  void append(final String msg) {
     stdout.addLast(msg);
     while (stdout.length > config.stdoutLineBufferSize) {
       stdout.removeFirst();
diff --git a/cyberwow/lib/widget/synced.dart b/cyberwow/lib/widget/synced.dart
index 701c7e1..b0ba79b 100644
--- a/cyberwow/lib/widget/synced.dart
+++ b/cyberwow/lib/widget/synced.dart
@@ -170,7 +170,7 @@ Widget terminalView(BuildContext context, String title, SyncedState state) {
       border: InputBorder.none,
     ),
     onFieldSubmitted: (v) {
-      String autoReplace(String x) {
+      String autoReplace(final String x) {
         final words = x.split(' ');
 
         if (words.length == 0) {