Test node connection when updating and node and show error codes on send fail instead of generic error

lib/services/coins/stellar/stellar_wallet.dart

@@ -58,10 +58,8 @@ class StellarWallet extends CoinServiceAPI with WalletCache, WalletDB {
 
 
     if (coin.isTestNet) {
-      stellarSdk = StellarSDK.TESTNET;
       stellarNetwork = Network.TESTNET;
     } else {
-      stellarSdk = StellarSDK.PUBLIC;
       stellarNetwork = Network.PUBLIC;
     }
 
@@ -217,10 +215,12 @@ class StellarWallet extends CoinServiceAPI with WalletCache, WalletDB {
     transaction.sign(senderKeyPair, stellarNetwork);
     try {
       SubmitTransactionResponse response =
-          await stellarSdk.submitTransaction(transaction);
-
+          await stellarSdk.submitTransaction(transaction).onError((error, stackTrace) => throw (error.toString()));
       if (!response.success) {
-        throw ("Unable to send transaction");
+        throw (
+            "${response.extras?.resultCodes?.transactionResultCode}"
+                " ::: ${response.extras?.resultCodes?.operationsResultCodes}"
+        );
       }
       return response.hash!;
     } catch (e, s) {
@@ -278,13 +278,15 @@ class StellarWallet extends CoinServiceAPI with WalletCache, WalletDB {
 
   @override
   Future<FeeObject> get fees async {
+
+    int fee = await getBaseFee();
     return FeeObject(
         numberOfBlocksFast: 10,
         numberOfBlocksAverage: 10,
         numberOfBlocksSlow: 10,
-        fast: 1,
-        medium: 1,
-        slow: 1);
+        fast: fee,
+        medium: fee,
+        slow: fee);
   }
 
   @override
@@ -482,13 +484,6 @@ class StellarWallet extends CoinServiceAPI with WalletCache, WalletDB {
         if (response is PaymentOperationResponse) {
           PaymentOperationResponse por = response;
 
-          Logging.instance.log(
-              "ALL TRANSACTIONS IS ${por.transactionSuccessful}",
-              level: LogLevel.Info);
-
-          Logging.instance.log("THIS TX HASH IS ${por.transactionHash}",
-              level: LogLevel.Info);
-
           SWTransaction.TransactionType type;
           if (por.sourceAccount == await getAddressSW()) {
             type = SWTransaction.TransactionType.outgoing;

lib/utilities/test_stellar_node_connection.dart

@@ -1,6 +1,7 @@
 import 'dart:convert';
 
 import 'package:http/http.dart' as http;
+import 'package:stellar_flutter_sdk/stellar_flutter_sdk.dart';
 
 Future<bool> testStellarNodeConnection(String host) async {
 
@@ -12,10 +13,21 @@ Future<bool> testStellarNodeConnection(String host) async {
   ).timeout(const Duration(milliseconds: 2000),
       onTimeout: () async => http.Response('Error', 408));
 
-  final json = jsonDecode(response.body);
+  if (response.statusCode == 200) {
+    //Get chain height for sdk
+    StellarSDK stellarSdk = StellarSDK(host);
+    final height = await stellarSdk.ledgers
+        .order(RequestBuilderOrder.DESC)
+        .limit(1)
+        .execute()
+        .then((value) => value.records!.first.sequence)
+        .onError((error, stackTrace) => throw ("Error getting chain height"));
 
-  if (response.statusCode == 200 && json["horizon_version"] != null) {
-    return true;
+    if (height > 0) {
+        return true;
+    } else {
+      return false;
+    }
   } else {
     return false;
   }

lib/widgets/node_card.dart

@@ -29,6 +29,7 @@ import 'package:stackwallet/utilities/logger.dart';
 import 'package:stackwallet/utilities/test_epic_box_connection.dart';
 import 'package:stackwallet/utilities/test_eth_node_connection.dart';
 import 'package:stackwallet/utilities/test_monero_node_connection.dart';
+import 'package:stackwallet/utilities/test_stellar_node_connection.dart';
 import 'package:stackwallet/utilities/text_styles.dart';
 import 'package:stackwallet/utilities/util.dart';
 import 'package:stackwallet/widgets/conditional_parent.dart';
@@ -192,10 +193,17 @@ class _NodeCardState extends ConsumerState<NodeCard> {
         }
         break;
 
-      case Coin.nano:
-      case Coin.banano:
       case Coin.stellar:
       case Coin.stellarTestnet:
+        try {
+          testPassed = await testStellarNodeConnection(node.host);
+        } catch(_) {
+          testPassed = false;
+        }
+        break;
+
+      case Coin.nano:
+      case Coin.banano:
         throw UnimplementedError();
         //TODO: check network/node
     }