Cw 602 nano bad rep (#1356)

* add support for paths in node settings

* update translations and fixes

* fix node path

* add rep warning flag

* update translations

* code cleanup [skip ci]

* add additional node options

* add migration

* update transaction history rpc to be under the limit

* review fixes [skip ci]

* [skip ci] updates

* move n2_node.dart

* minor code improvements

* more minor code cleanup

cw_nano/lib/nano_client.dart

@@ -2,6 +2,7 @@ import 'dart:async';
 import 'dart:convert';
 
 import 'package:cw_core/nano_account_info_response.dart';
+import 'package:cw_core/n2_node.dart';
 import 'package:cw_nano/nano_balance.dart';
 import 'package:cw_nano/nano_transaction_model.dart';
 import 'package:http/http.dart' as http;
@@ -16,6 +17,8 @@ class NanoClient {
     "nano-app": "cake-wallet"
   };
 
+  static const String N2_REPS_ENDPOINT = "https://rpc.nano.to";
+
   NanoClient() {
     SharedPreferences.getInstance().then((value) => prefs = value);
   }
@@ -418,7 +421,7 @@ class NanoClient {
           body: jsonEncode({
             "action": "account_history",
             "account": address,
-            "count": "250", // TODO: pick a number
+            "count": "100",
             // "raw": true,
           }));
       final data = await jsonDecode(response.body);
@@ -434,4 +437,37 @@ class NanoClient {
       return [];
     }
   }
+
+  Future<List<N2Node>> getN2Reps() async {
+    final response = await http.post(
+      Uri.parse(N2_REPS_ENDPOINT),
+      headers: CAKE_HEADERS,
+      body: jsonEncode({"action": "reps"}),
+    );
+    try {
+      final List<N2Node> nodes = (json.decode(response.body) as List<dynamic>)
+          .map((dynamic e) => N2Node.fromJson(e as Map<String, dynamic>))
+          .toList();
+      return nodes;
+    } catch (error) {
+      return [];
+    }
+  }
+
+  Future<int> getRepScore(String rep) async {
+    final response = await http.post(
+      Uri.parse(N2_REPS_ENDPOINT),
+      headers: CAKE_HEADERS,
+      body: jsonEncode({
+        "action": "rep_info",
+        "account": rep,
+      }),
+    );
+    try {
+      final N2Node node = N2Node.fromJson(json.decode(response.body) as Map<String, dynamic>);
+      return node.score ?? 100;
+    } catch (error) {
+      return 100;
+    }
+  }
 }

cw_nano/lib/nano_wallet.dart

@@ -13,6 +13,7 @@ import 'package:cw_core/transaction_priority.dart';
 import 'package:cw_core/wallet_info.dart';
 import 'package:cw_nano/file.dart';
 import 'package:cw_core/nano_account.dart';
+import 'package:cw_core/n2_node.dart';
 import 'package:cw_nano/nano_balance.dart';
 import 'package:cw_nano/nano_client.dart';
 import 'package:cw_nano/nano_transaction_credentials.dart';
@@ -65,9 +66,11 @@ abstract class NanoWalletBase
   String? _privateKey;
   String? _publicAddress;
   String? _hexSeed;
+  Timer? _receiveTimer;
 
   String? _representativeAddress;
-  Timer? _receiveTimer;
+  int repScore = 100;
+  bool get isRepOk => repScore >= 90;
 
   late final NanoClient _client;
   bool _isTransactionUpdating;
@@ -375,7 +378,7 @@ abstract class NanoWalletBase
 
     final data = json.decode(jsonSource) as Map;
     final mnemonic = data['mnemonic'] as String;
-    
+
     final balance = NanoBalance.fromRawString(
       currentBalance: data['currentBalance'] as String? ?? "0",
       receivableBalance: data['receivableBalance'] as String? ?? "0",
@@ -429,6 +432,8 @@ abstract class NanoWalletBase
       _representativeAddress = await _client.getRepFromPrefs();
       throw Exception("Failed to get representative address $e");
     }
+    
+    repScore = await _client.getRepScore(_representativeAddress!);
   }
 
   Future<void> regenerateAddress() async {
@@ -465,6 +470,10 @@ abstract class NanoWalletBase
     }
   }
 
+  Future<List<N2Node>> getN2Reps() async {
+    return _client.getN2Reps();
+  }
+
   Future<void>? updateBalance() async => await _updateBalance();
 
   @override