fix bug

lib/pages/node_page.dart

@@ -63,8 +63,8 @@ class _NodePageState extends State<NodePage> with TickerProviderStateMixin {
     final double buttonIconSize = 40.0;
     final blue = Color.fromARGB(255, 0, 255, 255);
 
-    final blueTextstyle = TextStyle(color: blue, fontSize: 25);
-    final whiteTextstyle = TextStyle(color: Colors.white, fontSize: 25);
+    final blueTextstyle = TextStyle(color: blue, fontSize: 18);
+    final whiteTextstyle = TextStyle(color: Colors.white, fontSize: 18);
     final edgeTexts = EdgeInsets.only(left: 30, right: 30);
     final dateTime = DateTime.now();
     time = formatDate(dateTime, [yyyy, '/', mm, '/', dd, ' ', HH, ':', nn]);
@@ -117,7 +117,7 @@ class _NodePageState extends State<NodePage> with TickerProviderStateMixin {
             tmpText = lines.sublist(lines.length - maxLines).join();
           }
           setState(() {
-            text = tmpText;
+              text = tmpText;
           });
         });
         startRequest = true;
@@ -406,7 +406,7 @@ class _NodePageState extends State<NodePage> with TickerProviderStateMixin {
         final balance = await node.balanceOfStc(address);
         final nodeInfo = await node.nodeInfo();
         final totalDifficulty =
-            nodeInfo['peer_info']['chain_info']['total_difficulty'];
+            nodeInfo['peer_info']['chain_info']['block_info']['total_difficulty'];
 
         final syncProgress = await node.syncProgress();
         var taskNames;
@@ -420,7 +420,8 @@ class _NodePageState extends State<NodePage> with TickerProviderStateMixin {
           this.address = address.toString();
           this.balance = balance.toBigInt() / BigInt.from(1000000000);
           this.difficulty = totalDifficulty;
-          this.taskName = taskNames[taskNames.length - 1];
+          if(taskNames!=null)
+            this.taskName = taskNames[taskNames.length - 1];
           this.percent = percent;
         });
       }

pubspec.yaml

@@ -28,18 +28,18 @@ dependencies:
 
   # The following adds the Cupertino Icons font to your application.
   # Use with the CupertinoIcons class for iOS style icons.
-  cupertino_icons: ^0.1.2
-  provider: ^3.1.0+1
+  cupertino_icons: ^1.0.2
+  provider: ^5.0.0
   hex: ^0.1.2
   shared_preferences: ^2.0.3
-  flutter_spinkit: "^4.1.1+1"
-  flutter_hooks: ^0.9.0
+  flutter_spinkit: ^5.0.0
+  flutter_hooks: ^0.16.0
   built_value: ^7.1.0
   built_collection: ^4.3.2
-  flutter_redux: ^0.7.0
-  font_awesome_flutter: ^8.2.0
+  flutter_redux: ^0.8.2
+  font_awesome_flutter: ^9.0.0
   path: 1.8.0
-  date_format: 1.0.9
+  date_format: ^2.0.2
   image: ^2.1.14
   starcoin_wallet:
     git: