diff --git a/cyberwow/lib/controller/rpc/rpc.dart b/cyberwow/lib/controller/rpc/rpc.dart
index b66b1fa..ede1dfa 100644
--- a/cyberwow/lib/controller/rpc/rpc.dart
+++ b/cyberwow/lib/controller/rpc/rpc.dart
@@ -81,13 +81,14 @@ Future<String> rpcString(String method, {String field}) async {
 Future<http.Response> syncInfo() => rpc('sync_info');
 Future<String> syncInfoString() => rpcString('sync_info');
 
-Future<int> targetHeight() => rpc('sync_info', field: 'target_height').then((x) => x as int);
-Future<int> height() => rpc('sync_info', field: 'height').then((x) => x as int);
+Future<int> targetHeight() => rpc('sync_info', field: 'target_height').then(asInt);
+Future<int> height() => rpc('sync_info', field: 'height').then(asInt);
 
 Future<http.Response> getInfo() => rpc('get_info');
 
 Future<Map<String, dynamic>> getInfoSimple() async {
-  final Map<String, dynamic> _getInfo = await rpc('get_info');
+  final _getInfo = await rpc('get_info').then(asMap);
+
   return _getInfo.map
   (
     (k, v) {
@@ -102,17 +103,15 @@ Future<Map<String, dynamic>> getInfoSimple() async {
 
 Future<String> getInfoString() => rpcString('get_info');
 
-Future<bool> offline() => rpc('get_info', field: 'offline').then((x) => x as bool);
+Future<bool> offline() => rpc('get_info', field: 'offline').then(asBool);
 
 Future<int> outgoingConnectionsCount() =>
-  rpc('get_info', field: 'outgoing_connections_count')
-  .then((x) => x as int);
+  rpc('get_info', field: 'outgoing_connections_count').then(asInt);
 Future<int> incomingConnectionsCount() =>
-  rpc('get_info', field: 'incoming_connections_count')
-  .then((x) => x as int);
+  rpc('get_info', field: 'incoming_connections_count').then(asInt);
 
 Future<List<dynamic>> getConnectionsSimple() async {
-  final List<dynamic> _connections = await rpc('get_connections', field: 'connections');
+  final _connections = await rpc('get_connections', field: 'connections').then(asList);
 
   return _connections.map
   (
diff --git a/cyberwow/lib/helper.dart b/cyberwow/lib/helper.dart
index b142be7..d6082e9 100644
--- a/cyberwow/lib/helper.dart
+++ b/cyberwow/lib/helper.dart
@@ -25,3 +25,12 @@ String pretty(dynamic x) {
   final JsonEncoder encoder = new JsonEncoder.withIndent('    ');
   return encoder.convert(x);
 }
+
+
+int asInt(dynamic x) => x == null ? 0 : x;
+
+bool asBool(dynamic x) => x == null ? false : x;
+
+List<dynamic> asList(dynamic x) => x == null ? [] : x;
+
+Map<String, dynamic> asMap(dynamic x) => x == null ? {} : x;