Cw 872 nano enhancements (#1909)

* fix headers on all api calls

* fix duplicate nano nodes on fresh install, api key fixes

* fix liveness indicators + false positive responses to queries

cw_core/lib/node.dart

@@ -99,8 +99,8 @@ class Node extends HiveObject with Keyable {
       case WalletType.polygon:
       case WalletType.solana:
       case WalletType.tron:
-      return Uri.parse(
-          "http${isSSL ? "s" : ""}://$uriRaw${path!.startsWith("/") ? path : "/$path"}");
+        return Uri.parse(
+            "http${isSSL ? "s" : ""}://$uriRaw${path!.startsWith("/") ? path : "/$path"}");
       case WalletType.none:
         throw Exception('Unexpected type ${type.toString()} for Node uri');
     }
@@ -152,6 +152,7 @@ class Node extends HiveObject with Keyable {
           return requestMoneroNode();
         case WalletType.nano:
         case WalletType.banano:
+          return requestNanoNode();
         case WalletType.bitcoin:
         case WalletType.litecoin:
         case WalletType.bitcoinCash:
@@ -198,14 +199,16 @@ class Node extends HiveObject with Keyable {
       );
       client.close();
 
-      if ((
-        response.body.contains("400 Bad Request") // Some other generic error
-        || response.body.contains("plain HTTP request was sent to HTTPS port") // Cloudflare
-        || response.headers["location"] != null // Generic reverse proxy
-        || response.body.contains("301 Moved Permanently") // Poorly configured generic reverse proxy
-      ) && !(useSSL??false)
-      ) {
-
+      if ((response.body.contains("400 Bad Request") // Some other generic error
+              ||
+              response.body.contains("plain HTTP request was sent to HTTPS port") // Cloudflare
+              ||
+              response.headers["location"] != null // Generic reverse proxy
+              ||
+              response.body
+                  .contains("301 Moved Permanently") // Poorly configured generic reverse proxy
+          ) &&
+          !(useSSL ?? false)) {
         final oldUseSSL = useSSL;
         useSSL = true;
         try {
@@ -271,6 +274,35 @@ class Node extends HiveObject with Keyable {
     }
   }
 
+  Future<bool> requestNanoNode() async {
+    try {
+      final response = await http.post(
+        uri,
+        headers: {
+          "Content-Type": "application/json",
+          "nano-app": "cake-wallet"
+        },
+        body: jsonEncode(
+          {
+            "action": "account_balance",
+            "account": "nano_38713x95zyjsqzx6nm1dsom1jmm668owkeb9913ax6nfgj15az3nu8xkx579",
+          },
+        ),
+      );
+      final data = await jsonDecode(response.body);
+      if (response.statusCode != 200 ||
+          data["error"] != null ||
+          data["balance"] == null ||
+          data["receivable"] == null) {
+        throw Exception(
+            "Error while trying to get balance! ${data["error"] != null ? data["error"] : ""}");
+      }
+      return true;
+    } catch (_) {
+      return false;
+    }
+  }
+
   Future<bool> requestEthereumServer() async {
     try {
       final response = await http.get(

cw_nano/lib/nano_client.dart

@@ -54,12 +54,12 @@ class NanoClient {
     }
   }
 
-  Map<String, String> getHeaders() {
+  Map<String, String> getHeaders(String host) {
     final headers = Map<String, String>.from(CAKE_HEADERS);
-    if (_node!.uri.host == "rpc.nano.to") {
+    if (host == "rpc.nano.to") {
       headers["key"] = nano_secrets.nano2ApiKey;
     }
-    if (_node!.uri.host == "nano.nownodes.io") {
+    if (host == "nano.nownodes.io") {
       headers["api-key"] = nano_secrets.nanoNowNodesApiKey;
     }
     return headers;
@@ -68,7 +68,7 @@ class NanoClient {
   Future<NanoBalance> getBalance(String address) async {
     final response = await http.post(
       _node!.uri,
-      headers: getHeaders(),
+      headers: getHeaders(_node!.uri.host),
       body: jsonEncode(
         {
           "action": "account_balance",
@@ -95,7 +95,7 @@ class NanoClient {
     try {
       final response = await http.post(
         _node!.uri,
-        headers: getHeaders(),
+        headers: getHeaders(_node!.uri.host),
         body: jsonEncode(
           {
             "action": "account_info",
@@ -116,7 +116,7 @@ class NanoClient {
     try {
       final response = await http.post(
         _node!.uri,
-        headers: CAKE_HEADERS,
+        headers: getHeaders(_node!.uri.host),
         body: jsonEncode(
           {
             "action": "block_info",
@@ -183,7 +183,7 @@ class NanoClient {
   Future<String> requestWork(String hash) async {
     final response = await http.post(
       _powNode!.uri,
-      headers: getHeaders(),
+      headers: getHeaders(_powNode!.uri.host),
       body: json.encode(
         {
           "action": "work_generate",
@@ -226,7 +226,7 @@ class NanoClient {
 
     final processResponse = await http.post(
       _node!.uri,
-      headers: getHeaders(),
+      headers: getHeaders(_node!.uri.host),
       body: processBody,
     );
 
@@ -425,7 +425,7 @@ class NanoClient {
     });
     final processResponse = await http.post(
       _node!.uri,
-      headers: getHeaders(),
+      headers: getHeaders(_node!.uri.host),
       body: processBody,
     );
 
@@ -441,7 +441,7 @@ class NanoClient {
     required String privateKey,
   }) async {
     final receivableResponse = await http.post(_node!.uri,
-        headers: getHeaders(),
+        headers: getHeaders(_node!.uri.host),
         body: jsonEncode({
           "action": "receivable",
           "account": destinationAddress,
@@ -493,7 +493,7 @@ class NanoClient {
   Future<List<NanoTransactionModel>> fetchTransactions(String address) async {
     try {
       final response = await http.post(_node!.uri,
-          headers: getHeaders(),
+          headers: getHeaders(_node!.uri.host),
           body: jsonEncode({
             "action": "account_history",
             "account": address,
@@ -509,15 +509,16 @@ class NanoClient {
           .map<NanoTransactionModel>((transaction) => NanoTransactionModel.fromJson(transaction))
           .toList();
     } catch (e) {
-      printV(e);
-      return [];
+      printV("error fetching transactions: $e");
+      rethrow;
     }
   }
 
   Future<List<N2Node>> getN2Reps() async {
+    final uri = Uri.parse(N2_REPS_ENDPOINT);
     final response = await http.post(
-      Uri.parse(N2_REPS_ENDPOINT),
-      headers: CAKE_HEADERS,
+      uri,
+      headers: getHeaders(uri.host),
       body: jsonEncode({"action": "reps"}),
     );
     try {
@@ -531,9 +532,10 @@ class NanoClient {
   }
 
   Future<int> getRepScore(String rep) async {
+    final uri = Uri.parse(N2_REPS_ENDPOINT);
     final response = await http.post(
-      Uri.parse(N2_REPS_ENDPOINT),
-      headers: CAKE_HEADERS,
+      uri,
+      headers: getHeaders(uri.host),
       body: jsonEncode({
         "action": "rep_info",
         "account": rep,

lib/entities/default_settings_migration.dart

@@ -505,7 +505,7 @@ Future<void> updateNanoNodeList({required Box<Node> nodes}) async {
   ];
   // add new nodes:
   for (final node in nodeList) {
-    if (listOfNewEndpoints.contains(node.uriRaw)) {
+    if (listOfNewEndpoints.contains(node.uriRaw) && !nodes.values.contains(node)) {
       await nodes.add(node);
     }
   }