CW-974: Add support for automatic node switching. (#2361)

* feat: Add support for automatic node switching.

This change:
- Adds isTrustedNodeForSwitching property to Node class.
- Adds UI Checkbox to mark a node as trusted for automatic switching in Node create or edit form.
- Implements checkNodeHealth method in wallet classes to verify node connectivity.
- Adds NodeSwitchingService for managing automatic node switching based on health checks.
- Adds setting option for user to enable/disable automated node switching

* fix(automatic-node-switch): Set node health check interval to 5 minutes in NodeSwitchingService

* refactor: Update handler method

* feat: Automatic Node Switching Improvements

This change:
- Moves enable automatic node switch to the Manage Nodes Page
- Adds check to verify node health before attempting to sync in EVM, Sol and Tron Wallets.
- Modifies trusted ndoes list for monero
- Adds trigger for Node Health Check when app resumes from background

* fix: Increase default request timeout for Tron and update health check interval for node switch

* feat: Enhance Node health check functionality.

This change adds additional checks for token balance in EVM, Solana and Tron Wallets in checkNodeHealth.

* fix: Update health check interval to 30 seconds in NodeSwitchingService

* Update bitcoin_electrum_server_list.yml

* fix: Electru wallet not connecting to new node after switching

* fix: Automated Node Switch not working on Decred Wallet

* fix: Add more nodes for AutoSwitching

This change:
- Enables more nodes across wallet types for auto switching
- Modifies CTA for checkbox
- Renames flags to fit

* fix: Add migration function for setting up default nodes for autoswitching

* fix: Review and testing fixes

* chore: Adjust balance and history fetch timer

assets/banano_node_list.yml

@@ -2,4 +2,5 @@
   uri: kaliumapi.appditto.com
   path: /api
   useSSL: true
-  is_default: true
+  is_default: true
+  isEnabledForAutoSwitching: true

assets/bitcoin_cash_electrum_server_list.yml

@@ -2,9 +2,11 @@
   uri: bitcoincash.stackwallet.com:50002
   is_default: true
   useSSL: true
+  isEnabledForAutoSwitching: true
 -
   uri: bch.aftrek.org:50002
   useSSL: true
+  isEnabledForAutoSwitching: true
 -
   uri: node.minisatoshi.cash:50002
   useSSL: true

assets/bitcoin_electrum_server_list.yml

@@ -2,8 +2,14 @@
   uri: btc-electrum.cakewallet.com:50002
   useSSL: true
   isDefault: true
+  isEnabledForAutoSwitching: true
 -
   uri: electrs.cakewallet.com:50001
 -
   uri: fulcrum.sethforprivacy.com:50002
   useSSL: true
+  isEnabledForAutoSwitching: true
+-
+  uri: electrum.cakewallet.com:50002
+  useSSL: true
+  isEnabledForAutoSwitching: true

assets/decred_node_list.yml

@@ -1,6 +1,8 @@
 -
   uri: default-spv-nodes
   is_default: true
+  isEnabledForAutoSwitching: true
 -
   uri: dcrd.sethforprivacy.com:9108
-  useSSL: true
+  useSSL: true
+  isEnabledForAutoSwitching: true

assets/ethereum_server_list.yml

@@ -2,6 +2,7 @@
   uri: ethereum-rpc.publicnode.com
   useSSL: true
   isDefault: true
+  isEnabledForAutoSwitching: true
 -
   uri: eth.llamarpc.com
 -
@@ -10,5 +11,6 @@
   uri: eth-mainnet.public.blastapi.io
 -
   uri: eth.nownodes.io
+  isEnabledForAutoSwitching: true
 -
   uri: ethereum.publicnode.com

assets/litecoin_electrum_server_list.yml

@@ -2,9 +2,11 @@
   uri: ltc-electrum.cakewallet.com:50002
   useSSL: true
   isDefault: true
+  isEnabledForAutoSwitching: true
 -
   uri: litecoin.stackwallet.com:20063
   useSSL: true
+  isEnabledForAutoSwitching: true
 -
   uri: electrum-ltc.bysh.me:50002
   useSSL: true

assets/nano_node_list.yml

@@ -1,14 +1,17 @@
 -
   uri: nano.nownodes.io
   useSSL: true
+  isEnabledForAutoSwitching: true
 -
   uri: rpc.nano.to
   is_default: true
   useSSL: true
+  isEnabledForAutoSwitching: true
 -
   uri: node.nautilus.io
   path: /api
   useSSL: true
+  isEnabledForAutoSwitching: true
 -
   uri: app.natrium.io
   path: /api

assets/nano_pow_node_list.yml

@@ -2,8 +2,11 @@
   uri: rpc.nano.to
   useSSL: true
   is_default: true
+  isEnabledForAutoSwitching: true
 -
   uri: workers.perish.co
+  isEnabledForAutoSwitching: true
 -
   uri: worker.nanoriver.cc
   useSSL: true
+  isEnabledForAutoSwitching: true

assets/node_list.yml

@@ -3,6 +3,7 @@
   is_default: true
   trusted: true
   useSSL: true
+  isEnabledForAutoSwitching: true
 -
   uri: cakexmrl7bonq7ovjka5kuwuyd3f7qnkz6z6s6dmsy3uckwra7bvggyd.onion:18081
   is_default: false
@@ -10,6 +11,8 @@
   uri: node.sethforprivacy.com:443
   useSSL: true
   is_default: false
+  isEnabledForAutoSwitching: true
 -
   uri: nodes.hashvault.pro:18081
   is_default: false
+  isEnabledForAutoSwitching: true

assets/polygon_node_list.yml

@@ -4,7 +4,9 @@
   uri: polygon-bor-rpc.publicnode.com
   useSSL: true
   isDefault: true
+  isEnabledForAutoSwitching: true
 -
   uri: polygon.llamarpc.com
 -
-  uri: matic.nownodes.io
+  uri: matic.nownodes.io
+  isEnabledForAutoSwitching: true

assets/solana_node_list.yml

@@ -4,10 +4,13 @@
 -
   uri: api.mainnet-beta.solana.com:443
   useSSL: true
+  isEnabledForAutoSwitching: true
 -
   uri: solana-rpc.publicnode.com:443
   useSSL: true
+  isEnabledForAutoSwitching: true
 -
   uri: solana-mainnet.core.chainstack.com
   useSSL: true
-  is_default: true
+  is_default: true
+  isEnabledForAutoSwitching: true

assets/tron_node_list.yml

@@ -6,6 +6,8 @@
   uri: api.trongrid.io
   is_default: true
   useSSL: true
+  isEnabledForAutoSwitching: true
 - 
   uri: trx.nownodes.io
-  useSSL: true
+  useSSL: true
+  isEnabledForAutoSwitching: true

assets/wownero_node_list.yml

@@ -2,10 +2,12 @@
   uri: node3.monerodevs.org:34568
   is_default: true
   useSSL: false
+  isEnabledForAutoSwitching: true
 -
   uri: node2.monerodevs.org:34568
   is_default: false
   useSSL: false
+  isEnabledForAutoSwitching: true
 -
   uri: node.monerodevs.org:34568
   is_default: false

assets/zano_node_list.yml

@@ -1,7 +1,9 @@
 -
   uri: 37.27.100.59:10500
   useSSL: false
+  isEnabledForAutoSwitching: true
 -
   uri: zano.cakewallet.com:11211
   is_default: true
-  useSSL: false
+  useSSL: false
+  isEnabledForAutoSwitching: true

cw_bitcoin/lib/electrum.dart

@@ -203,15 +203,25 @@ class ElectrumClient {
         return [];
       });
 
-  Future<Map<String, dynamic>> getBalance(String scriptHash) =>
-      call(method: 'blockchain.scripthash.get_balance', params: [scriptHash])
-          .then((dynamic result) {
-        if (result is Map<String, dynamic>) {
-          return result;
-        }
-
-        return <String, dynamic>{};
-      });
+  Future<Map<String, dynamic>> getBalance(String scriptHash, {bool throwOnError = false}) async {
+    try {
+      final result = await call(method: 'blockchain.scripthash.get_balance', params: [scriptHash]);
+      if (result is Map<String, dynamic>) {
+        return result;
+      }
+      
+      if (throwOnError) {
+        throw Exception('Invalid response format for getBalance');
+      }
+      
+      return <String, dynamic>{};
+    } catch (e) {
+      if (throwOnError) {
+        rethrow;
+      }
+      return <String, dynamic>{};
+    }
+  }
 
   Future<List<Map<String, dynamic>>> getHistory(String scriptHash) =>
       call(method: 'blockchain.scripthash.get_history', params: [scriptHash])

cw_bitcoin/lib/electrum_wallet.dart

@@ -2300,6 +2300,26 @@ abstract class ElectrumWalletBase
     await save();
   }
 
+  @override
+  Future<bool> checkNodeHealth() async {
+    try {
+      final addresses = walletAddresses.allAddresses
+          .where((address) => RegexUtils.addressTypeFromStr(address.address, network) is! MwebAddress)
+          .toList();
+      
+      if (addresses.isEmpty) {
+        return false;
+      }
+      
+      final firstAddress = addresses.first;
+      final sh = firstAddress.getScriptHash(network);
+      await electrumClient.getBalance(sh, throwOnError: true);
+      return true;
+    } catch (e) {
+      return false;
+    }
+  }
+
   @override
   void setExceptionHandler(void Function(FlutterErrorDetails) onError) => _onError = onError;
 

cw_core/lib/node.dart

@@ -26,6 +26,7 @@ class Node extends HiveObject with Keyable {
     this.trusted = false,
     this.socksProxyAddress,
     this.path = '',
+    this.isEnabledForAutoSwitching = false,
     String? uri,
     WalletType? type,
   }) {
@@ -44,7 +45,8 @@ class Node extends HiveObject with Keyable {
         password = map['password'] as String?,
         useSSL = map['useSSL'] as bool?,
         trusted = map['trusted'] as bool? ?? false,
-        socksProxyAddress = map['socksProxyPort'] as String?;
+        socksProxyAddress = map['socksProxyPort'] as String?,
+        isEnabledForAutoSwitching = map['isEnabledForAutoSwitching'] as bool? ?? false;
 
   static const typeId = NODE_TYPE_ID;
   static const boxName = 'Nodes';
@@ -82,6 +84,9 @@ class Node extends HiveObject with Keyable {
   @HiveField(10)
   bool? supportsMweb;
 
+  @HiveField(11, defaultValue: false)
+  bool isEnabledForAutoSwitching;
+
   bool get isSSL => useSSL ?? false;
 
   bool get useSocksProxy => socksProxyAddress == null ? false : socksProxyAddress!.isNotEmpty;

cw_core/lib/wallet_base.dart

@@ -112,4 +112,9 @@ abstract class WalletBase<BalanceType extends Balance, HistoryType extends Trans
   bool isTestnet = false;
 
   bool canSend() => true;
+
+  /// This is used to check if the current node is healthy by making a lightweight RPC call
+  /// Each wallet implementation should override this to make a single, efficient call
+  /// Returns true if the node is healthy, false otherwise
+  Future<bool> checkNodeHealth();
 }

cw_decred/lib/api/libdcrwallet.dart

@@ -454,7 +454,7 @@ class Libwallet {
     return res.payload;
   }
 
-  Future<Map> balance(String walletName) async {
+  Future<Map> balance(String walletName, {bool throwOnError = false}) async {
     if (_closed) throw StateError('Closed');
     final completer = Completer<Object?>.sync();
     final id = _idCounter++;
@@ -468,6 +468,9 @@ class Libwallet {
     try {
       return jsonDecode(res.payload);
     } catch (_) {
+      if (throwOnError) {
+        rethrow;
+      }
       return {};
     }
   }

cw_decred/lib/wallet.dart

@@ -26,7 +26,6 @@ import 'package:cw_core/wallet_info.dart';
 import 'package:cw_core/wallet_base.dart';
 import 'package:cw_core/transaction_priority.dart';
 import 'package:cw_core/pending_transaction.dart';
-import 'package:cw_core/pathForWallet.dart';
 import 'package:cw_core/sync_status.dart';
 import 'package:cw_core/node.dart';
 import 'package:cw_core/unspent_coins_info.dart';
@@ -594,6 +593,9 @@ abstract class DecredWalletBase
     );
   }
 
+  @override
+  Future<bool> checkNodeHealth() async => await checkSync();
+
   @override
   void setExceptionHandler(void Function(FlutterErrorDetails) onError) => onError;
 

cw_evm/lib/evm_chain_client.dart

@@ -65,10 +65,13 @@ abstract class EVMChainClient {
     // });
   }
 
-  Future<EtherAmount> getBalance(EthereumAddress address) async {
+  Future<EtherAmount> getBalance(EthereumAddress address, {bool throwOnError = false}) async {
     try {
       return await _client!.getBalance(address);
     } catch (_) {
+      if (throwOnError) {
+        rethrow;
+      }
       return EtherAmount.zero();
     }
   }

cw_evm/lib/evm_chain_wallet.dart

@@ -164,6 +164,36 @@ abstract class EVMChainWalletBase
     EncryptionFileUtils encryptionFileUtils,
   );
 
+  @override
+  Future<bool> checkNodeHealth() async {
+    try {
+      // Check native balance
+      await _client.getBalance(_evmChainPrivateKey.address, throwOnError: true);
+      
+      // Check USDC token balance
+      String usdcContractAddress;
+      if (_client.chainId == 1) {
+        // Ethereum mainnet
+        usdcContractAddress = "0xa0b86991c6218b36c1d19d4a2e9eb0ce3606eb48";
+      } else if (_client.chainId == 137) {
+        // Polygon mainnet
+        usdcContractAddress = "0x2791bca1f2de4661ed88a30c99a7a9449aa84174";
+      } else {
+        // If we are not on Ethereum or Polygon, we skip ERC20 token check
+        return true;
+      }
+      
+      await _client.fetchERC20Balances(
+        _evmChainPrivateKey.address,
+        usdcContractAddress,
+      );
+      
+      return true;
+    } catch (e) {
+      return false;
+    }
+  }
+
   //! Common Methods across child classes
 
   String idFor(String name, WalletType type) => '${walletTypeToString(type).toLowerCase()}_$name';
@@ -379,15 +409,21 @@ abstract class EVMChainWalletBase
   Future<void> startSync() async {
     try {
       syncStatus = AttemptingSyncStatus();
+
+      // Verify node health before attempting to sync
+      final isHealthy = await checkNodeHealth();
+      if (!isHealthy) {
+        syncStatus = FailedSyncStatus();
+        return;
+      }
+
       await _updateBalance();
       await _updateTransactions();
-
       await _updateEstimatedGasFeeParams();
 
       _updateFeesTimer ??= Timer.periodic(const Duration(seconds: 30), (timer) async {
         await _updateEstimatedGasFeeParams();
       });
-
       syncStatus = SyncedSyncStatus();
     } catch (e) {
       syncStatus = FailedSyncStatus();
@@ -825,7 +861,7 @@ abstract class EVMChainWalletBase
       _transactionsUpdateTimer!.cancel();
     }
 
-    _transactionsUpdateTimer = Timer.periodic(const Duration(seconds: 15), (_) {
+    _transactionsUpdateTimer = Timer.periodic(const Duration(seconds: 20), (_) {
       _updateTransactions();
       _updateBalance();
     });

cw_monero/lib/monero_wallet.dart

@@ -184,6 +184,24 @@ abstract class MoneroWalletBase extends WalletBase<MoneroBalance,
   @override
   Future<void>? updateBalance() => null;
 
+  @override
+  Future<bool> checkNodeHealth() async {
+    try {
+      // Check if the wallet is currently connected to the daemon
+      final isConnected = monero_wallet.isConnectedSync();
+      
+      if (!isConnected) {
+        return false; // It's not connected to daemon
+      }
+      
+      // Check to get current node height to ensure daemon is responsive
+      final nodeHeight = await monero_wallet.getNodeHeight();
+      return nodeHeight > 0;
+    } catch (e) {
+      return false;
+    }
+  }
+
   @override
   Future<void> close({bool shouldCleanup = false}) async {
     if (isHardwareWallet) {

cw_nano/lib/nano_client.dart

@@ -92,7 +92,7 @@ class NanoClient {
     return NanoBalance(currentBalance: cur, receivableBalance: rec);
   }
 
-  Future<AccountInfoResponse?> getAccountInfo(String address) async {
+  Future<AccountInfoResponse?> getAccountInfo(String address, {bool throwOnError = false}) async {
     try {
       final response = await ProxyWrapper().post(
         clearnetUri: _node!.uri,
@@ -110,6 +110,9 @@ class NanoClient {
       return AccountInfoResponse.fromJson(data);
     } catch (e) {
       printV("error while getting account info $e");
+      if (throwOnError) {
+        rethrow;
+      }
       return null;
     }
   }

cw_nano/lib/nano_wallet.dart

@@ -518,8 +518,19 @@ abstract class NanoWalletBase
     return _client.getN2Reps();
   }
 
+  @override
   Future<void>? updateBalance() async => await _updateBalance();
 
+  @override
+  Future<bool> checkNodeHealth() async {
+    try {
+      await _client.getAccountInfo(_publicAddress!, throwOnError: true);
+      return true;
+    } catch (_) {
+      return false;
+    }
+  }
+
   @override
   Future<void> renameWalletFiles(String newWalletName) async {
     final currentWalletPath = await pathForWallet(name: walletInfo.name, type: type);

cw_solana/lib/solana_client.dart

@@ -51,7 +51,7 @@ class SolanaWalletClient {
     }
   }
 
-  Future<double> getBalance(String walletAddress) async {
+  Future<double> getBalance(String walletAddress, {bool throwOnError = false}) async {
     try {
       final balance = await _provider!.requestWithContext(
         SolanaRPCGetBalance(
@@ -65,6 +65,9 @@ class SolanaWalletClient {
 
       return solBalance;
     } catch (_) {
+      if (throwOnError) {
+        rethrow;
+      }
       return 0.0;
     }
   }
@@ -88,31 +91,38 @@ class SolanaWalletClient {
   }
 
   Future<SolanaBalance?> getSplTokenBalance(
-      String mintAddress, String walletAddress) async {
-    // Fetch the token accounts (a token can have multiple accounts for various uses)
-    final tokenAccounts = await getSPLTokenAccounts(mintAddress, walletAddress);
+      String mintAddress, String walletAddress, {bool throwOnError = false}) async {
+    try {
+      // Fetch the token accounts (a token can have multiple accounts for various uses)
+      final tokenAccounts = await getSPLTokenAccounts(mintAddress, walletAddress);
 
-    // Handle scenario where there is no token account
-    if (tokenAccounts == null || tokenAccounts.isEmpty) {
+      // Handle scenario where there is no token account
+      if (tokenAccounts == null || tokenAccounts.isEmpty) {
+        return null;
+      }
+
+      // Sum the balances of all accounts with the specified mint address
+      double totalBalance = 0.0;
+
+      for (var tokenAccount in tokenAccounts) {
+        final tokenAmountResult = await _provider!.request(
+          SolanaRPCGetTokenAccountBalance(account: tokenAccount.pubkey),
+        );
+
+        final balance = tokenAmountResult.uiAmountString;
+
+        final balanceAsDouble = double.tryParse(balance ?? '0.0') ?? 0.0;
+
+        totalBalance += balanceAsDouble;
+      }
+
+      return SolanaBalance(totalBalance);
+    } catch (_) {
+      if (throwOnError) {
+        rethrow;
+      }
       return null;
     }
-
-    // Sum the balances of all accounts with the specified mint address
-    double totalBalance = 0.0;
-
-    for (var tokenAccount in tokenAccounts) {
-      final tokenAmountResult = await _provider!.request(
-        SolanaRPCGetTokenAccountBalance(account: tokenAccount.pubkey),
-      );
-
-      final balance = tokenAmountResult.uiAmountString;
-
-      final balanceAsDouble = double.tryParse(balance ?? '0.0') ?? 0.0;
-
-      totalBalance += balanceAsDouble;
-    }
-
-    return SolanaBalance(totalBalance);
   }
 
   Future<double> getFeeForMessage(String message, Commitment commitment) async {

cw_solana/lib/solana_wallet.dart

@@ -377,6 +377,13 @@ abstract class SolanaWalletBase
     try {
       syncStatus = AttemptingSyncStatus();
 
+      // Verify node health before attempting to sync
+      final isHealthy = await checkNodeHealth();
+      if (!isHealthy) {
+        syncStatus = FailedSyncStatus();
+        return;
+      }
+
       await Future.wait([
         _updateBalance(),
         _updateNativeSOLTransactions(),
@@ -477,6 +484,22 @@ abstract class SolanaWalletBase
   @override
   Future<void>? updateBalance() async => await _updateBalance();
 
+  @override
+  Future<bool> checkNodeHealth() async {
+    try {
+      // Check native balance
+      await _client.getBalance(solanaAddress, throwOnError: true);
+      
+      // Check USDC token balance
+      const usdcMintAddress = "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v";
+      await _client.getSplTokenBalance(usdcMintAddress, solanaAddress, throwOnError: true);
+      
+      return true;
+    } catch (e) {
+      return false;
+    }
+  }
+
   List<SPLToken> get splTokenCurrencies => splTokensBox.values.toList();
 
   void addInitialTokens() {
@@ -554,6 +577,7 @@ abstract class SolanaWalletBase
       _updateBalance();
       _updateNativeSOLTransactions();
       _updateSPLTokenTransactions();
+      _getEstimatedFees();
     });
   }
 
@@ -564,7 +588,7 @@ abstract class SolanaWalletBase
 
     // Sign the message bytes with the wallet's private key
     final signature = (_solanaPrivateKey.sign(messageBytes));
-    
+
     return Base58Encoder.encode(signature);
   }
 

cw_tron/lib/tron_client.dart

@@ -102,12 +102,15 @@ class TronClient {
     }
   }
 
-  Future<BigInt> getBalance(TronAddress address) async {
+  Future<BigInt> getBalance(TronAddress address, {bool throwOnError = false}) async {
     try {
       final accountDetails = await _provider!.request(TronRequestGetAccount(address: address));
 
       return accountDetails?.balance ?? BigInt.zero;
     } catch (_) {
+      if (throwOnError) {
+        rethrow;
+      }
       return BigInt.zero;
     }
   }
@@ -476,7 +479,7 @@ class TronClient {
     }
   }
 
-  Future<TronBalance> fetchTronTokenBalances(String userAddress, String contractAddress) async {
+  Future<TronBalance> fetchTronTokenBalances(String userAddress, String contractAddress, {bool throwOnError = false}) async {
     try {
       final ownerAddress = TronAddress(userAddress);
 
@@ -499,6 +502,9 @@ class TronClient {
 
       return TronBalance(outputResult);
     } catch (_) {
+      if (throwOnError) {
+        rethrow;
+      }
       return TronBalance(BigInt.zero);
     }
   }

cw_tron/lib/tron_wallet.dart

@@ -276,6 +276,13 @@ abstract class TronWalletBase
   Future<void> startSync() async {
     try {
       syncStatus = AttemptingSyncStatus();
+      
+      // Verify node health before attempting to sync
+      final isHealthy = await checkNodeHealth();
+      if (!isHealthy) {
+        syncStatus = FailedSyncStatus();
+        return;
+      }
       await _updateBalance();
       await fetchTransactions();
       fetchTrc20ExcludedTransactions();
@@ -505,6 +512,22 @@ abstract class TronWalletBase
   @override
   Future<void>? updateBalance() async => await _updateBalance();
 
+  @override
+  Future<bool> checkNodeHealth() async {
+    try {
+      // Check native balance
+      await _client.getBalance(_tronPublicKey.toAddress(), throwOnError: true);
+      
+      // Check USDT token balance
+      const usdtContractAddress = "TR7NHqjeKQxGTCi8q8ZY4pL8otSzgjLj6t";
+      await _client.fetchTronTokenBalances(_tronAddress, usdtContractAddress, throwOnError: true);
+      
+      return true;
+    } catch (e) {
+      return false;
+    }
+  }
+
   List<TronToken> get tronTokenCurrencies => tronTokensBox.values.toList();
 
   Future<void> addTronToken(TronToken token) async {

cw_wownero/lib/wownero_wallet.dart

@@ -174,6 +174,24 @@ abstract class WowneroWalletBase
   @override
   Future<void>? updateBalance() => null;
 
+  @override
+  Future<bool> checkNodeHealth() async {
+    try {
+      // Check if the wallet is currently connected to the daemon
+      final isConnected = wownero_wallet.isConnectedSync();
+
+      if (!isConnected) {
+        return false; // It's not connected to daemon
+      }
+
+      // Check to get current node height to ensure daemon is responsive
+      final nodeHeight = await wownero_wallet.getNodeHeight();
+      return nodeHeight > 0;
+    } catch (e) {
+      return false;
+    }
+  }
+
   @override
   Future<void> close({bool shouldCleanup = false}) async {
     _listener?.stop();

cw_zano/lib/zano_wallet.dart

@@ -411,6 +411,17 @@ abstract class ZanoWalletBase
   @override
   Future<void>? updateBalance() => null;
 
+  @override
+  Future<bool> checkNodeHealth() async {
+    try {
+      final status = await getWalletStatus();
+    
+      return status.isDaemonConnected;
+    } catch (_) {
+      return false;
+    }
+  }
+
   Future<void> updateTransactions() async {
     try {
       if (_isTransactionUpdating) {

lib/core/node_switching_service.dart

@@ -0,0 +1,126 @@
+import 'dart:async';
+import 'package:cw_core/node.dart';
+import 'package:cw_core/wallet_type.dart';
+import 'package:cake_wallet/store/app_store.dart';
+import 'package:cake_wallet/store/settings_store.dart';
+import 'package:cw_core/utils/print_verbose.dart';
+import 'package:hive/hive.dart';
+
+class NodeSwitchingService {
+  NodeSwitchingService({
+    required this.appStore,
+    required this.settingsStore,
+    required this.nodeSource,
+  });
+
+  static const int _healthCheckIntervalSeconds = 30;
+
+  Timer? _healthCheckTimer;
+
+  bool _isSwitching = false;
+  bool get isSwitching => _isSwitching;
+
+  final AppStore appStore;
+  final SettingsStore settingsStore;
+  final Box<Node> nodeSource;
+
+  // Track used nodes to cycle through all trusted nodes
+  final Map<WalletType, List<dynamic>> _usedNodeKeys = {};
+
+  void startHealthCheckTimer() {
+    _healthCheckTimer?.cancel();
+    _healthCheckTimer = Timer.periodic(
+      Duration(seconds: _healthCheckIntervalSeconds),
+      (_) => performHealthCheck(),
+    );
+
+    performHealthCheck();
+  }
+
+  void stopHealthCheckTimer() {
+    _healthCheckTimer?.cancel();
+    _healthCheckTimer = null;
+  }
+
+  Future<void> performHealthCheck() async {
+    if (appStore.wallet == null) return;
+
+    if (!settingsStore.enableAutomaticNodeSwitching) return;
+
+    if (_isSwitching) return;
+
+    try {
+      final isHealthy = await appStore.wallet!.checkNodeHealth();
+
+      if (!isHealthy) {
+        await _switchToNextTrustedNode();
+      }
+    } catch (e) {
+      printV('Error during health check: $e');
+    }
+  }
+
+  /// Switch to the next available trusted node
+  Future<void> _switchToNextTrustedNode() async {
+    _isSwitching = true;
+
+    try {
+      final walletType = appStore.wallet!.type;
+      final currentNode = settingsStore.getCurrentNode(walletType);
+
+      // Get all trusted nodes for this wallet type
+      final trustedNodes = nodeSource.values
+          .where((node) => node.type == walletType && node.isEnabledForAutoSwitching)
+          .toList();
+
+      if (trustedNodes.isEmpty) {
+        printV('No trusted nodes available for switching');
+        return;
+      }
+
+      // Initialize used nodes list for this wallet type if it does not exist
+      _usedNodeKeys.putIfAbsent(walletType, () => []);
+
+      // Add current node to used list if not already there
+      if (!_usedNodeKeys[walletType]!.contains(currentNode.key)) {
+        _usedNodeKeys[walletType]!.add(currentNode.key);
+      }
+
+      // Get next unused trusted node from the list
+      Node? nextNode;
+      for (final node in trustedNodes) {
+        if (!_usedNodeKeys[walletType]!.contains(node.key)) {
+          nextNode = node;
+          break;
+        }
+      }
+
+      // If all trusted nodes have been used, reset the list and start over
+      if (nextNode == null) {
+        printV('All trusted nodes have been tried, resetting and starting over');
+        _usedNodeKeys[walletType]!.clear();
+        nextNode = trustedNodes.first;
+      }
+
+      // Add the next node to used list
+      _usedNodeKeys[walletType]!.add(nextNode.key);
+
+      printV('Switching from ${currentNode.uriRaw} to ${nextNode.uriRaw}');
+      printV('Used nodes for ${walletType}: ${_usedNodeKeys[walletType]}');
+
+      // Update the current node in settings
+      settingsStore.nodes[walletType] = nextNode;
+
+      // Connect the wallet to the new node
+      await appStore.wallet!.connectToNode(node: nextNode);
+
+      await appStore.wallet!.startSync();
+
+      printV('Successfully switched to node: ${nextNode.uriRaw}');
+    } catch (e) {
+      printV('Error switching to next trusted node: $e');
+    } finally {
+      _isSwitching = false;
+    }
+  }
+}

lib/di.dart

@@ -23,6 +23,7 @@ import 'package:cake_wallet/core/totp_request_details.dart';
 import 'package:cake_wallet/core/wallet_creation_service.dart';
 import 'package:cake_wallet/core/wallet_loading_service.dart';
 import 'package:cake_wallet/core/yat_service.dart';
+import 'package:cake_wallet/core/node_switching_service.dart';
 import 'package:cake_wallet/entities/biometric_auth.dart';
 import 'package:cake_wallet/entities/contact.dart';
 import 'package:cake_wallet/entities/contact_record.dart';
@@ -1516,5 +1517,11 @@ Future<void> setup({
 
   getIt.registerFactory(() => DEuroSavingsPage(getIt<DEuroViewModel>()));
 
+  getIt.registerLazySingleton(() => NodeSwitchingService(
+    appStore: getIt.get<AppStore>(),
+    settingsStore: getIt.get<SettingsStore>(),
+    nodeSource: _nodeSource,
+  ));
+
   _isSetupFinished = true;
 }

lib/entities/default_settings_migration.dart

@@ -510,7 +510,10 @@ Future<void> defaultSettingsMigration(
             providerName: "SwapTrade",
             enabled: true,
           );
-			    break;
+          break;
+        case 50:
+          migrateExistingNodesToUseAutoSwitching(nodes: nodes, powNodes: powNodes);
+          break;
         default:
           break;
       }
@@ -1088,7 +1091,7 @@ Future<void> checkCurrentNodes(
 
   if (currentBitcoinElectrumServer == null) {
     final cakeWalletElectrum =
-        Node(uri: cakeWalletBitcoinElectrumUri, type: WalletType.bitcoin, useSSL: false);
+        Node(uri: cakeWalletBitcoinElectrumUri, type: WalletType.bitcoin, useSSL: false, isEnabledForAutoSwitching: true);
     await nodeSource.add(cakeWalletElectrum);
     final cakeWalletElectrumTestnet =
         Node(uri: publicBitcoinTestnetElectrumUri, type: WalletType.bitcoin, useSSL: false);
@@ -1188,7 +1191,7 @@ Future<void> resetBitcoinElectrumServer(
 
   if (cakeWalletNode == null) {
     cakeWalletNode =
-        Node(uri: cakeWalletBitcoinElectrumUri, type: WalletType.bitcoin, useSSL: false);
+        Node(uri: cakeWalletBitcoinElectrumUri, type: WalletType.bitcoin, useSSL: false, isEnabledForAutoSwitching: true);
     // final cakeWalletElectrumTestnet =
     //     Node(uri: publicBitcoinTestnetElectrumUri, type: WalletType.bitcoin, useSSL: false);
     // await nodeSource.add(cakeWalletElectrumTestnet);
@@ -1272,3 +1275,47 @@ Future<void> removeMoneroWorld(
     );
   }
 }
+
+Future<void> migrateExistingNodesToUseAutoSwitching(
+    {required Box<Node> nodes, required Box<Node> powNodes}) async {
+  final listOfDefaultNodesWithAutoSwitching = [
+    'bitcoincash.stackwallet.com:50002',
+    'bch.aftrek.org:50002',
+    'btc-electrum.cakewallet.com:50002',
+    'fulcrum.sethforprivacy.com:50002',
+    'default-spv-nodes',
+    'dcrd.sethforprivacy.com:9108',
+    'ethereum-rpc.publicnode.com',
+    'eth.nownodes.io',
+    'ltc-electrum.cakewallet.com:50002',
+    'litecoin.stackwallet.com:20063',
+    'nano.nownodes.io',
+    'rpc.nano.to',
+    'node.nautilus.io',
+    'rpc.nano.to',
+    'workers.perish.co',
+    'worker.nanoriver.cc',
+    'xmr-node.cakewallet.com:18081',
+    'node.sethforprivacy.com:443',
+    'nodes.hashvault.pro:18081',
+    'polygon-bor-rpc.publicnode.com',
+    'matic.nownodes.io',
+    'api.mainnet-beta.solana.com:443',
+    'solana-rpc.publicnode.com:443',
+    'solana-mainnet.core.chainstack.com',
+    'api.trongrid.io',
+    'trx.nownodes.io',
+    'node3.monerodevs.org:34568',
+    'node2.monerodevs.org:34568',
+    '37.27.100.59:10500',
+    'zano.cakewallet.com:11211',
+    'electrum.cakewallet.com:50002',
+  ];
+  for (var node in [...nodes.values.toList(), ...powNodes.values.toList()]) {
+    if (listOfDefaultNodesWithAutoSwitching.contains(node.uriRaw)) {
+      node.isEnabledForAutoSwitching = true;
+      await node.save();
+    }
+  }
+}
+

lib/entities/preferences_key.dart

@@ -112,4 +112,5 @@ class PreferencesKey {
       '${PreferencesKey.walletConnectPairingTopicsList}_${publicKey}';
   static String backgroundSyncLastTrigger(String walletId) => 'background_sync_last_trigger_${walletId}';
   static const backgroundSyncNotificationsEnabled = 'background_sync_notifications_enabled';
+  static const enableAutomaticNodeSwitching = 'enable_automatic_node_switching';
 }

lib/main.dart

@@ -6,6 +6,7 @@ import 'package:cake_wallet/app_scroll_behavior.dart';
 import 'package:cake_wallet/buy/order.dart';
 import 'package:cake_wallet/core/auth_service.dart';
 import 'package:cake_wallet/core/background_sync.dart';
+import 'package:cake_wallet/core/node_switching_service.dart';
 import 'package:cake_wallet/di.dart';
 import 'package:cake_wallet/entities/contact.dart';
 import 'package:cake_wallet/entities/default_settings_migration.dart';
@@ -249,7 +250,7 @@ Future<void> initializeAppConfigs({bool loadWallet = true}) async {
     payjoinSessionSource: payjoinSessionSource,
     anonpayInvoiceInfo: anonpayInvoiceInfo,
     havenSeedStore: havenSeedStore,
-    initialMigrationVersion: 49,
+    initialMigrationVersion: 50,
   );
 }
 
@@ -327,6 +328,7 @@ class AppState extends State<App> with SingleTickerProviderStateMixin {
         final authService = getIt.get<AuthService>();
         final linkViewModel = getIt.get<LinkViewModel>();
         final tradeMonitor = getIt.get<TradeMonitor>();
+        final nodeSwitchingService = getIt.get<NodeSwitchingService>();
         final settingsStore = appStore.settingsStore;
         final statusBarColor = Colors.transparent;
         final authenticationStore = getIt.get<AuthenticationStore>();
@@ -351,6 +353,7 @@ class AppState extends State<App> with SingleTickerProviderStateMixin {
           authService: authService,
           linkViewModel: linkViewModel,
           tradeMonitor: tradeMonitor,
+          nodeSwitchingService: nodeSwitchingService,
           child: ThemeProvider(
             themeStore: appStore.themeStore,
             materialAppBuilder: (context, theme, darkTheme, themeMode) => MaterialApp(

lib/reactions/bootstrap.dart

@@ -14,6 +14,7 @@ import 'package:cake_wallet/store/app_store.dart';
 import 'package:cake_wallet/store/settings_store.dart';
 import 'package:cake_wallet/store/authentication_store.dart';
 import 'package:cake_wallet/store/dashboard/fiat_conversion_store.dart';
+import 'package:cake_wallet/core/node_switching_service.dart';
 
 Future<void> bootstrapOffline() async {
   final authenticationStore = getIt.get<AuthenticationStore>();
@@ -40,4 +41,6 @@ void bootstrapOnline(GlobalKey<NavigatorState> navigatorKey, {required bool load
   startCurrentFiatApiModeChangeReaction(appStore, settingsStore, fiatConversionStore);
   startOnCurrentNodeChangeReaction(appStore);
   startFiatRateUpdate(appStore, settingsStore, fiatConversionStore);
+
+  getIt.get<NodeSwitchingService>().startHealthCheckTimer();
 }

lib/src/screens/nodes/widgets/node_form.dart

@@ -32,6 +32,7 @@ class NodeForm extends StatelessWidget {
         ..setLogin((editingNode!.login ?? ''))
         ..setSSL((editingNode!.isSSL))
         ..setTrusted((editingNode!.trusted))
+        ..setIsEnabledForAutoSwitching((editingNode!.isEnabledForAutoSwitching))
         ..setSocksProxy((editingNode!.useSocksProxy))
         ..setSocksProxyAddress((editingNode!.socksProxyAddress ?? ''));
     }
@@ -153,6 +154,25 @@ class NodeForm extends StatelessWidget {
             ),
           ),
           SizedBox(height: 10.0),
+          Padding(
+            padding: EdgeInsets.only(top: 20),
+            child: Row(
+              mainAxisAlignment: MainAxisAlignment.start,
+              mainAxisSize: MainAxisSize.max,
+              children: [
+                Observer(
+                  builder: (_) => StandardCheckbox(
+                    value: nodeViewModel.isEnabledForAutoSwitching,
+                    borderColor: Theme.of(context).colorScheme.surfaceContainerHighest,
+                    iconColor: Theme.of(context).colorScheme.primary,
+                    onChanged: (value) => nodeViewModel.isEnabledForAutoSwitching = value,
+                    caption: S.current.enable_for_auto_switching,
+                  ),
+                ),
+              ],
+            ),
+          ),
+          SizedBox(height: 10.0),
           if (nodeViewModel.hasAuthCredentials) ...[
             Row(
               children: <Widget>[

lib/src/screens/root/root.dart

@@ -2,8 +2,10 @@ import 'dart:async';
 import 'dart:io';
 import 'package:cake_wallet/bitcoin/bitcoin.dart';
 import 'package:cake_wallet/core/auth_service.dart';
+import 'package:cake_wallet/core/node_switching_service.dart';
 import 'package:cake_wallet/core/totp_request_details.dart';
 import 'package:cake_wallet/core/trade_monitor.dart';
+import 'package:cake_wallet/di.dart';
 import 'package:cake_wallet/utils/device_info.dart';
 import 'package:cake_wallet/view_model/link_view_model.dart';
 import 'package:cw_core/utils/print_verbose.dart';
@@ -29,6 +31,7 @@ class Root extends StatefulWidget {
     required this.authService,
     required this.linkViewModel,
     required this.tradeMonitor,
+    required this.nodeSwitchingService,
   }) : super(key: key);
 
   final AuthenticationStore authenticationStore;
@@ -38,6 +41,7 @@ class Root extends StatefulWidget {
   final Widget child;
   final LinkViewModel linkViewModel;
   final TradeMonitor tradeMonitor;
+  final NodeSwitchingService nodeSwitchingService;
 
   @override
   RootState createState() => RootState();
@@ -161,6 +165,10 @@ class RootState extends State<Root> with WidgetsBindingObserver {
         }
 
         widget.tradeMonitor.resumeTradeMonitoring();
+
+        // Trigger node health check when app resumes
+        widget.nodeSwitchingService.performHealthCheck();
+
         break;
       default:
         break;

lib/src/screens/settings/manage_nodes_page.dart

@@ -2,6 +2,7 @@ import 'package:cake_wallet/generated/i18n.dart';
 import 'package:cake_wallet/routes.dart';
 import 'package:cake_wallet/src/screens/base_page.dart';
 import 'package:cake_wallet/src/screens/nodes/widgets/node_list_row.dart';
+import 'package:cake_wallet/src/screens/settings/widgets/settings_switcher_cell.dart';
 import 'package:cake_wallet/src/widgets/alert_with_two_actions.dart';
 import 'package:cake_wallet/src/widgets/standard_list.dart';
 import 'package:cake_wallet/utils/show_pop_up.dart';
@@ -34,7 +35,23 @@ class ManageNodesPage extends BasePage {
               onTap: (_) async => await Navigator.of(context).pushNamed(Routes.newNode),
             ),
           ),
-          SizedBox(height: 20),
+          Observer(
+            builder: (_) => SettingsSwitcherCell(
+              key: ValueKey('manage_nodes_page_enable_auto_node_switching_button_key'),
+              title: S.current.enable_auto_node_switching,
+              value: isPow
+                  ? powNodeListViewModel!.enableAutomaticNodeSwitching
+                  : nodeListViewModel!.enableAutomaticNodeSwitching,
+              onValueChange: (BuildContext context, bool value) {
+                if (isPow) {
+                  powNodeListViewModel!.setEnableAutomaticNodeSwitching(value);
+                } else {
+                  nodeListViewModel!.setEnableAutomaticNodeSwitching(value);
+                }
+              },
+            ),
+          ),
+          SizedBox(height: 8),
           Observer(
             builder: (BuildContext context) {
               int itemsCount =

lib/src/screens/settings/other_settings_page.dart

@@ -36,22 +36,22 @@ class OtherSettingsPage extends BasePage {
               if (_otherSettingsViewModel.displayTransactionPriority)
                 _otherSettingsViewModel.walletType == WalletType.bitcoin ?
                   SettingsPriorityPickerCell(
-                    title: S.current.settings_fee_priority,
-                    items: priorityForWalletType(_otherSettingsViewModel.walletType),
-                    displayItem: _otherSettingsViewModel.getDisplayBitcoinPriority,
-                    selectedItem: _otherSettingsViewModel.transactionPriority,
-                    customItemIndex: _otherSettingsViewModel.customPriorityItemIndex,
-                    onItemSelected: _otherSettingsViewModel.onDisplayBitcoinPrioritySelected,
-                    customValue: _otherSettingsViewModel.customBitcoinFeeRate,
-                    maxValue: _otherSettingsViewModel.maxCustomFeeRate?.toDouble(),
+                        title: S.current.settings_fee_priority,
+                        items: priorityForWalletType(_otherSettingsViewModel.walletType),
+                        displayItem: _otherSettingsViewModel.getDisplayBitcoinPriority,
+                        selectedItem: _otherSettingsViewModel.transactionPriority,
+                        customItemIndex: _otherSettingsViewModel.customPriorityItemIndex,
+                        onItemSelected: _otherSettingsViewModel.onDisplayBitcoinPrioritySelected,
+                        customValue: _otherSettingsViewModel.customBitcoinFeeRate,
+                        maxValue: _otherSettingsViewModel.maxCustomFeeRate?.toDouble(),
                   ) :
                   SettingsPickerCell(
-                    title: S.current.settings_fee_priority,
-                    items: priorityForWalletType(_otherSettingsViewModel.walletType),
-                    displayItem: _otherSettingsViewModel.getDisplayPriority,
-                    selectedItem: _otherSettingsViewModel.transactionPriority,
-                    onItemSelected: _otherSettingsViewModel.onDisplayPrioritySelected,
-                  ),
+                        title: S.current.settings_fee_priority,
+                        items: priorityForWalletType(_otherSettingsViewModel.walletType),
+                        displayItem: _otherSettingsViewModel.getDisplayPriority,
+                        selectedItem: _otherSettingsViewModel.transactionPriority,
+                        onItemSelected: _otherSettingsViewModel.onDisplayPrioritySelected,
+                      ),
               if (_otherSettingsViewModel.changeRepresentativeEnabled)
                 SettingsCellWithArrow(
                   title: S.current.change_rep,

lib/store/settings_store.dart

@@ -128,6 +128,7 @@ abstract class SettingsStoreBase with Store {
       required this.mwebEnabled,
       required this.hasEnabledMwebBefore,
       required this.mwebNodeUri,
+      required bool initialEnableAutomaticNodeSwitching,
       TransactionPriority? initialBitcoinTransactionPriority,
       TransactionPriority? initialMoneroTransactionPriority,
       TransactionPriority? initialWowneroTransactionPriority,
@@ -186,6 +187,7 @@ abstract class SettingsStoreBase with Store {
         currentSyncMode = initialSyncMode,
         currentSyncAll = initialSyncAll,
         currentBuiltinTor = initialBuiltinTor,
+        enableAutomaticNodeSwitching = initialEnableAutomaticNodeSwitching,
         priority = ObservableMap<WalletType, TransactionPriority>() {
     //this.nodes = ObservableMap<WalletType, Node>.of(nodes);
 
@@ -613,6 +615,11 @@ abstract class SettingsStoreBase with Store {
         (_) => mwebNodeUri,
         (String mwebNodeUri) =>
             _sharedPreferences.setString(PreferencesKey.mwebNodeUri, mwebNodeUri));
+    
+    reaction(
+        (_) => enableAutomaticNodeSwitching,
+        (bool enableAutomaticNodeSwitching) => _sharedPreferences.setBool(
+            PreferencesKey.enableAutomaticNodeSwitching, enableAutomaticNodeSwitching));
 
     this.nodes.observe((change) {
       if (change.newValue != null && change.key != null) {
@@ -859,6 +866,9 @@ abstract class SettingsStoreBase with Store {
   @observable
   String mwebNodeUri;
 
+  @observable
+  bool enableAutomaticNodeSwitching;
+
   final SecureStorage _secureStorage;
   final SharedPreferences _sharedPreferences;
 
@@ -1034,6 +1044,8 @@ abstract class SettingsStoreBase with Store {
         sharedPreferences.getBool(PreferencesKey.hasEnabledMwebBefore) ?? false;
     final mwebNodeUri = sharedPreferences.getString(PreferencesKey.mwebNodeUri) ??
         "ltc-electrum.cakewallet.com:9333";
+    final enableAutomaticNodeSwitching =
+        sharedPreferences.getBool(PreferencesKey.enableAutomaticNodeSwitching) ?? true;
 
     // If no value
     if (pinLength == null || pinLength == 0) {
@@ -1335,6 +1347,7 @@ abstract class SettingsStoreBase with Store {
       mwebEnabled: mwebEnabled,
       mwebNodeUri: mwebNodeUri,
       hasEnabledMwebBefore: hasEnabledMwebBefore,
+      initialEnableAutomaticNodeSwitching: enableAutomaticNodeSwitching,
       initialMoneroTransactionPriority: moneroTransactionPriority,
       initialWowneroTransactionPriority: wowneroTransactionPriority,
       initialZanoTransactionPriority: zanoTransactionPriority,
@@ -1478,6 +1491,9 @@ abstract class SettingsStoreBase with Store {
     actionlistDisplayMode = ObservableList<ActionListDisplayMode>();
     actionlistDisplayMode.addAll(deserializeActionlistDisplayModes(
         sharedPreferences.getInt(PreferencesKey.displayActionListModeKey) ?? defaultActionsMode));
+    enableAutomaticNodeSwitching =
+        sharedPreferences.getBool(PreferencesKey.enableAutomaticNodeSwitching) ??
+            enableAutomaticNodeSwitching;
     var pinLength = sharedPreferences.getInt(PreferencesKey.currentPinLength);
     // If no value
     if (pinLength == null || pinLength == 0) {

lib/view_model/node_list/node_create_or_edit_view_model.dart

@@ -26,6 +26,7 @@ abstract class NodeCreateOrEditViewModelBase with Store {
         login = '',
         password = '',
         trusted = false,
+        isEnabledForAutoSwitching = false,
         useSocksProxy = false,
         socksProxyAddress = '';
 
@@ -56,6 +57,9 @@ abstract class NodeCreateOrEditViewModelBase with Store {
   @observable
   bool trusted;
 
+  @observable
+  bool isEnabledForAutoSwitching;
+
   @observable
   bool useSocksProxy;
 
@@ -118,6 +122,7 @@ abstract class NodeCreateOrEditViewModelBase with Store {
     password = '';
     useSSL = false;
     trusted = false;
+    isEnabledForAutoSwitching = false;
     useSocksProxy = false;
     socksProxyAddress = '';
   }
@@ -143,6 +148,9 @@ abstract class NodeCreateOrEditViewModelBase with Store {
   @action
   void setTrusted(bool val) => trusted = val;
 
+  @action
+  void setIsEnabledForAutoSwitching(bool val) => isEnabledForAutoSwitching = val;
+
   @action
   void setSocksProxy(bool val) => useSocksProxy = val;
 
@@ -159,6 +167,7 @@ abstract class NodeCreateOrEditViewModelBase with Store {
         password: password,
         useSSL: useSSL,
         trusted: trusted,
+        isEnabledForAutoSwitching: isEnabledForAutoSwitching,
         socksProxyAddress: socksProxyAddress);
     try {
       state = IsExecutingState();
@@ -190,6 +199,7 @@ abstract class NodeCreateOrEditViewModelBase with Store {
         password: password,
         useSSL: useSSL,
         trusted: trusted,
+        isEnabledForAutoSwitching: isEnabledForAutoSwitching,
         socksProxyAddress: socksProxyAddress);
     try {
       connectionState = IsExecutingState();

lib/view_model/node_list/node_list_view_model.dart

@@ -41,6 +41,13 @@ abstract class NodeListViewModelBase with Store {
       S.current.change_current_node(uri) +
       '${uri.endsWith('.onion') || uri.contains('.onion:') ? '\n' + (CakeTor.instance.enabled ? '' : S.current.orbot_running_alert) : ''}';
 
+  @computed
+  bool get enableAutomaticNodeSwitching => settingsStore.enableAutomaticNodeSwitching;
+
+  @action
+  void setEnableAutomaticNodeSwitching(bool value) =>
+      settingsStore.enableAutomaticNodeSwitching = value;
+
   final ObservableList<Node> nodes;
   final SettingsStore settingsStore;
   final Box<Node> _nodeSource;

lib/view_model/node_list/pow_node_list_view_model.dart

@@ -41,6 +41,13 @@ abstract class PowNodeListViewModelBase with Store {
       S.current.change_current_node(uri) +
       '${uri.endsWith('.onion') || uri.contains('.onion:') ? '\n' + (CakeTor.instance.enabled ? '' : S.current.orbot_running_alert) : ''}';
 
+  @computed
+  bool get enableAutomaticNodeSwitching => settingsStore.enableAutomaticNodeSwitching;
+
+  @action
+  void setEnableAutomaticNodeSwitching(bool value) =>
+      settingsStore.enableAutomaticNodeSwitching = value;
+
   final ObservableList<Node> nodes;
   final SettingsStore settingsStore;
   final Box<Node> _nodeSource;

res/values/strings_ar.arb

@@ -306,7 +306,9 @@
   "electrum_address_disclaimer": "نقوم بإنشاء عناوين جديدة في كل مرة تستخدم فيها عنوانًا ، لكن العناوين السابقة تستمر في العمل",
   "email_address": "عنوان البريد الالكترونى",
   "enable": "يُمكَِن",
+  "enable_auto_node_switching": "تمكين تبديل العقدة التلقائية",
   "enable_builtin_tor": "تمكين بنيت في تور",
+  "enable_for_auto_switching": "تمكين للتبديل التلقائي",
   "enable_mempool_api": "MEMPOOL API للحصول على رسوم وتواريخ دقيقة",
   "enable_replace_by_fee": "تمكين الاستبدال",
   "enable_silent_payments_scanning": "ابدأ في مسح المدفوعات الصامتة ، حتى يتم الوصول إلى الطرف",

res/values/strings_bg.arb

@@ -306,7 +306,9 @@
   "electrum_address_disclaimer": "Нови адреси се генерират всеки път, когато използвате този, но и предишните продължават да работят",
   "email_address": "Имейл адрес",
   "enable": "Активиране",
+  "enable_auto_node_switching": "Активиране на автоматично превключване на възли",
   "enable_builtin_tor": "Активирайте вграден Tor",
+  "enable_for_auto_switching": "Активирайте за автоматично превключване",
   "enable_mempool_api": "Mempool API за точни такси и дати",
   "enable_replace_by_fee": "Активиране на замяна по забрана",
   "enable_silent_payments_scanning": "Започнете да сканирате безшумните плащания, докато се достигне съветът",

res/values/strings_cs.arb

@@ -306,7 +306,9 @@
   "electrum_address_disclaimer": "Po každém použití je generována nová adresa, ale předchozí adresy také stále fungují",
   "email_address": "E-mailová adresa",
   "enable": "Umožnit",
+  "enable_auto_node_switching": "Povolit automatické přepínání uzlů",
   "enable_builtin_tor": "Povolte vestavěné tor",
+  "enable_for_auto_switching": "Povolit automatické přepínání",
   "enable_mempool_api": "Mempool API pro přesné poplatky a data",
   "enable_replace_by_fee": "Povolit výměnu podle poplatku",
   "enable_silent_payments_scanning": "Začněte skenovat tiché platby, dokud není dosaženo špičky",

res/values/strings_de.arb

@@ -306,7 +306,9 @@
   "electrum_address_disclaimer": "Wir generieren jedes Mal neue Adressen, wenn Sie eine verwenden, aber vorherige Adressen funktionieren weiterhin",
   "email_address": "E-Mail-Adresse",
   "enable": "Aktivieren",
+  "enable_auto_node_switching": "Aktivieren Sie die automatische Knotenschaltung",
   "enable_builtin_tor": "Aktivieren Sie den bau-in tor",
+  "enable_for_auto_switching": "Aktivieren Sie die automatische Schaltung",
   "enable_mempool_api": "Mempool-API für genaue Gebühren und Daten",
   "enable_replace_by_fee": "Aktivieren Sie Ersatz für Fee",
   "enable_silent_payments_scanning": "Scannen Sie nach Silent Payments ihrer Adresse",

res/values/strings_en.arb

@@ -306,7 +306,9 @@
   "electrum_address_disclaimer": "We generate new addresses each time you use one, but previous addresses continue to work",
   "email_address": "Email Address",
   "enable": "Enable",
+  "enable_auto_node_switching": "Enable Automatic Node Switching",
   "enable_builtin_tor": "Enable built-in Tor",
+  "enable_for_auto_switching": "Enable for Auto-Switching",
   "enable_mempool_api": "Mempool API for accurate fees and dates",
   "enable_replace_by_fee": "Enable Replace-By-Fee",
   "enable_silent_payments_scanning": "Start scanning for transactions sent to your Silent Payment address.",

res/values/strings_es.arb

@@ -306,7 +306,9 @@
   "electrum_address_disclaimer": "Generamos nuevas direcciones cada vez que usa una, pero las direcciones anteriores siguen funcionando",
   "email_address": "Dirección de correo electrónico",
   "enable": "Permitir",
+  "enable_auto_node_switching": "Habilitar la conmutación de nodo automático",
   "enable_builtin_tor": "Habilitar Tor incorporado",
+  "enable_for_auto_switching": "Habilitar para el cambio automático",
   "enable_mempool_api": "API de Mempool para tarifas y fechas precisas",
   "enable_replace_by_fee": "Habilitar reemplazar por tarea",
   "enable_silent_payments_scanning": "Comienza a escanear pagos silenciosos, hasta que se alcance la altura actual",

res/values/strings_fr.arb

@@ -306,7 +306,9 @@
   "electrum_address_disclaimer": "Nous générons de nouvelles adresses à chaque fois que vous en utilisez une, mais les adresses précédentes continuent à fonctionner",
   "email_address": "Adresse e-mail",
   "enable": "Activer",
+  "enable_auto_node_switching": "Activer la commutation automatique du nœud",
   "enable_builtin_tor": "Activer le Tor construit",
+  "enable_for_auto_switching": "Activer pour le commutation automatique",
   "enable_mempool_api": "API Mempool pour les frais et dates précis",
   "enable_replace_by_fee": "Activer Remplace-by-Fee",
   "enable_silent_payments_scanning": "Commencez à analyser les transactions envoyées à votre adresse de paiement silencieux.",

res/values/strings_ha.arb

@@ -306,7 +306,9 @@
   "electrum_address_disclaimer": "Muna samar da sababbin adireshi duk lokacin da kuka yi amfani da ɗaya, amma adiresoshin da suka gabata suna ci gaba da aiki",
   "email_address": "Adireshin i-mel",
   "enable": "Ba dama",
+  "enable_auto_node_switching": "Yana ba da damar kunna kumburi ta atomatik",
   "enable_builtin_tor": "Sanya riguna-inf",
+  "enable_for_auto_switching": "Kunna don sauyawa na atomatik",
   "enable_mempool_api": "Mampool API don ingantattun kudade da kwanakin",
   "enable_replace_by_fee": "Ba da damar maye gurbin-by-kudin",
   "enable_silent_payments_scanning": "Fara bincika biya na shiru, har sai tip ɗin ya kai",

res/values/strings_hi.arb

@@ -306,7 +306,9 @@
   "electrum_address_disclaimer": "हर बार जब आप एक का उपयोग करते हैं तो हम नए पते उत्पन्न करते हैं, लेकिन पिछले पते काम करना जारी रखते हैं",
   "email_address": "ईमेल पता",
   "enable": "सक्षम",
+  "enable_auto_node_switching": "स्वचालित नोड स्विचिंग सक्षम करें",
   "enable_builtin_tor": "बिल्ट-इन टोर को सक्षम करें",
+  "enable_for_auto_switching": "ऑटो-स्विचिंग के लिए सक्षम करें",
   "enable_mempool_api": "सटीक शुल्क और तिथियों के लिए मेमपूल एपीआई",
   "enable_replace_by_fee": "प्रतिस्थापित-दर-शुल्क सक्षम करें",
   "enable_silent_payments_scanning": "मूक भुगतान स्कैनिंग सक्षम करें",

res/values/strings_hr.arb

@@ -306,7 +306,9 @@
   "electrum_address_disclaimer": "Minden egyes alkalommal új címeket generálunk, de a korábbi címek továbbra is működnek",
   "email_address": "Adresa e-pošte",
   "enable": "Omogućiti",
+  "enable_auto_node_switching": "Omogući automatsko prebacivanje čvorova",
   "enable_builtin_tor": "Omogućite ugrađeni u tor",
+  "enable_for_auto_switching": "Omogućite automatsko prebacivanje",
   "enable_mempool_api": "Mempool API za točne naknade i datume",
   "enable_replace_by_fee": "Omogući zamjenu",
   "enable_silent_payments_scanning": "Započnite skeniranje tihih plaćanja, dok se ne postigne savjet",

res/values/strings_hy.arb

@@ -306,7 +306,9 @@
   "electrum_address_disclaimer": "Մենք ստեղծում ենք նոր հասցե ամեն անգամ, երբ դուք օգտագործում եք այն, բայց նախորդ հասցեները շարունակում են աշխատել",
   "email_address": "Էլ. փոստի հասցե",
   "enable": "Միացնել",
+  "enable_auto_node_switching": "Միացնել ավտոմատ հանգույցի անջատումը",
   "enable_builtin_tor": "Միացրեք ներկառուցված ջահը",
+  "enable_for_auto_switching": "Միացնել ավտոմատ անջատումը",
   "enable_mempool_api": "Mempool API ճշգրիտ վճարների եւ ամսաթվերի համար",
   "enable_replace_by_fee": "Միացնել փոխարինումը միջնորդավճարով",
   "enable_silent_payments_scanning": "Միացնել Լուռ Վճարումների սկանավորումը",

res/values/strings_id.arb

@@ -306,7 +306,9 @@
   "electrum_address_disclaimer": "Kami menghasilkan alamat baru setiap kali Anda menggunakan satu, tetapi alamat sebelumnya tetap berfungsi",
   "email_address": "Alamat Email",
   "enable": "Memungkinkan",
+  "enable_auto_node_switching": "Aktifkan switching simpul otomatis",
   "enable_builtin_tor": "Aktifkan built-in tor",
+  "enable_for_auto_switching": "Aktifkan untuk pengalihan otomatis",
   "enable_mempool_api": "API Mempool untuk biaya dan tanggal yang akurat",
   "enable_replace_by_fee": "Aktifkan ganti-by-fee",
   "enable_silent_payments_scanning": "Mulailah memindai pembayaran diam, sampai ujung tercapai",

res/values/strings_it.arb

@@ -306,7 +306,9 @@
   "electrum_address_disclaimer": "Generiamo nuovi indirizzi ogni volta che ne utilizzi uno, ma gli indirizzi precedenti continuano a funzionare",
   "email_address": "Indirizzo e-mail",
   "enable": "Abilita",
+  "enable_auto_node_switching": "Abilita la commutazione del nodo automatico",
   "enable_builtin_tor": "Abilita buildi-in tor",
+  "enable_for_auto_switching": "Abilita per il cambio automatico",
   "enable_mempool_api": "API Mempool per commissioni e date accurate",
   "enable_replace_by_fee": "Abilita Replace-By-Fee",
   "enable_silent_payments_scanning": "Inizia a scansionare le transazioni inviate al tuo indirizzo Silent Payments",

res/values/strings_ja.arb

@@ -306,7 +306,9 @@
   "electrum_address_disclaimer": "使用するたびに新しいアドレスが生成されますが、以前のアドレスは引き続き機能します",
   "email_address": "メールアドレス",
   "enable": "有効にする",
+  "enable_auto_node_switching": "自動ノードスイッチングを有効にします",
   "enable_builtin_tor": "組み込みのTORを有効にします",
+  "enable_for_auto_switching": "自動スイッチを有効にします",
   "enable_mempool_api": "正確な料金と日付のMempool API",
   "enable_replace_by_fee": "交換ごとに有効にします",
   "enable_silent_payments_scanning": "先端に達するまで、サイレント決済のスキャンを開始します",

res/values/strings_ko.arb

@@ -306,7 +306,9 @@
   "electrum_address_disclaimer": "사용할 때마다 새 주소를 생성하지만 이전 주소도 계속 작동합니다",
   "email_address": "이메일 주소",
   "enable": "활성화",
+  "enable_auto_node_switching": "자동 노드 스위칭을 활성화합니다",
   "enable_builtin_tor": "내장 Tor를 활성화하십시오",
+  "enable_for_auto_switching": "자동 전환을 가능하게합니다",
   "enable_mempool_api": "정확한 수수료 및 날짜를 위한 Mempool API",
   "enable_replace_by_fee": "RBF(Replace-By-Fee) 활성화",
   "enable_silent_payments_scanning": "사일런트 페이먼트 주소로 전송된 트랜잭션 스캔 시작",

res/values/strings_my.arb

@@ -306,7 +306,9 @@
   "electrum_address_disclaimer": "သင်အသုံးပြုသည့်အချိန်တိုင်းတွင် ကျွန်ုပ်တို့သည် လိပ်စာအသစ်များကို ထုတ်ပေးသော်လည်း ယခင်လိပ်စာများသည် ဆက်လက်အလုပ်လုပ်နေပါသည်။",
   "email_address": "အီးမေးလ်လိပ်စာ",
   "enable": "စွမ်းဆောင်နိုင်စေ",
+  "enable_auto_node_switching": "အလိုအလျောက် node switching ကို enable",
   "enable_builtin_tor": "built-in Tor ကို Enable လုပ်ပါ",
+  "enable_for_auto_switching": "Auto-switching အတွက်ဖွင့်ပါ",
   "enable_mempool_api": "Mempool API တိကျသောအခကြေးငွေနှင့်ရက်စွဲများအတွက်",
   "enable_replace_by_fee": "အစားထိုး - by- အခကြေးငွေ enable",
   "enable_silent_payments_scanning": "အစွန်အဖျားသို့ရောက်ရှိသည်အထိအသံတိတ်ငွေပေးချေမှုကိုစကင်ဖတ်စစ်ဆေးပါ",

res/values/strings_nl.arb

@@ -306,7 +306,9 @@
   "electrum_address_disclaimer": "We genereren nieuwe adressen elke keer dat u er een gebruikt, maar eerdere adressen blijven werken",
   "email_address": "E-mailadres",
   "enable": "Inschakelen",
+  "enable_auto_node_switching": "Schakel automatische knoopschakeling in",
   "enable_builtin_tor": "Schakel ingebouwde tor in",
+  "enable_for_auto_switching": "Inschakelen voor automatisch schakelen",
   "enable_mempool_api": "Mempool API voor nauwkeurige kosten en datums",
   "enable_replace_by_fee": "Schakel vervangen door een fee",
   "enable_silent_payments_scanning": "Begin met het scannen van stille betalingen, totdat de tip is bereikt",

res/values/strings_pl.arb

@@ -306,7 +306,9 @@
   "electrum_address_disclaimer": "Za każdym razem, gdy wykorzystasz adres, dla wiekszej prywatności generujemy nowy, ale poprzednie adresy nadal działają, i moga odbierać środki",
   "email_address": "Adres e-mail",
   "enable": "Włącz",
+  "enable_auto_node_switching": "Włącz automatyczne przełączanie węzłów",
   "enable_builtin_tor": "Włącz wbudowany tor",
+  "enable_for_auto_switching": "Włącz do automatycznego przełączania",
   "enable_mempool_api": "Mempool API dla dokładnych opłat i dat",
   "enable_replace_by_fee": "Włącz wymianę po lewej",
   "enable_silent_payments_scanning": "Zacznij skanować Silent Payments",

res/values/strings_pt.arb

@@ -306,7 +306,9 @@
   "electrum_address_disclaimer": "Geramos novos endereços cada vez que você usa um, mas os endereços anteriores continuam funcionando",
   "email_address": "Endereço de e-mail",
   "enable": "Habilitar",
+  "enable_auto_node_switching": "Ativar comutação automática de nó",
   "enable_builtin_tor": "Ative o Buildi-in Tor",
+  "enable_for_auto_switching": "Ativar a troca automática",
   "enable_mempool_api": "Mempool API para taxas e datas precisas",
   "enable_replace_by_fee": "Habilite substituir por taxa",
   "enable_silent_payments_scanning": "Comece a escanear pagamentos silenciosos, até que o topo seja alcançada",

res/values/strings_ru.arb

@@ -306,7 +306,9 @@
   "electrum_address_disclaimer": "Мы генерируем новые адреса каждый раз, когда вы их используете, но предыдущие адреса продолжают работать.",
   "email_address": "Адрес электронной почты",
   "enable": "Давать возможность",
+  "enable_auto_node_switching": "Включить автоматическое переключение узлов",
   "enable_builtin_tor": "Включить встроенный в Tor",
+  "enable_for_auto_switching": "Включить для автоматического переключения",
   "enable_mempool_api": "Mempool API за точные сборы и даты",
   "enable_replace_by_fee": "Включить замену за пикой",
   "enable_silent_payments_scanning": "Начните сканировать безмолвные платежи, пока не будет достигнут наконечник",

res/values/strings_th.arb

@@ -306,7 +306,9 @@
   "electrum_address_disclaimer": "เราสร้างที่อยู่ใหม่ทุกครั้งที่คุณใช้หนึ่งอย่าง แต่ที่อยู่เก่ายังสามารถใช้ได้ต่อไป",
   "email_address": "ที่อยู่อีเมล",
   "enable": "เปิดใช้งาน",
+  "enable_auto_node_switching": "เปิดใช้งานการสลับโหนดอัตโนมัติ",
   "enable_builtin_tor": "เปิดใช้งาน Tor ในตัว",
+  "enable_for_auto_switching": "เปิดใช้งานการสลับอัตโนมัติ",
   "enable_mempool_api": "Mempool API สำหรับค่าธรรมเนียมและวันที่ที่ถูกต้อง",
   "enable_replace_by_fee": "เปิดใช้งานการเปลี่ยนโดยค่าธรรมเนียม",
   "enable_silent_payments_scanning": "เริ่มสแกนการชำระเงินแบบเงียบจนกว่าจะถึงปลาย",

res/values/strings_tl.arb

@@ -306,7 +306,9 @@
   "electrum_address_disclaimer": "Bumubuo kami ng mga bagong address sa tuwing gagamit ka ng isa, ngunit ang mga nakaraang address ay patuloy na gumagana",
   "email_address": "Email Address",
   "enable": "Paganahin",
+  "enable_auto_node_switching": "Paganahin ang awtomatikong paglipat ng node",
   "enable_builtin_tor": "Paganahin ang built-in tor",
+  "enable_for_auto_switching": "Paganahin para sa auto-switch",
   "enable_mempool_api": "Mempool API para sa tumpak na bayad at mga petsa",
   "enable_replace_by_fee": "Paganahin ang  Replace-By-Fee",
   "enable_silent_payments_scanning": "Simulan ang pag -scan ng tahimik na pagbabayad, hanggang sa maabot ang tip",

res/values/strings_tr.arb

@@ -306,7 +306,9 @@
   "electrum_address_disclaimer": "Adresini her kullandığında yeni adres oluşturuyoruz, ancak önceki adresler de çalışmaya devam eder",
   "email_address": "E-posta Adresi",
   "enable": "Olanak vermek",
+  "enable_auto_node_switching": "Otomatik Düğüm Anahtarlamasını Etkinleştir",
   "enable_builtin_tor": "Yerleşik Tor'u etkinleştirin",
+  "enable_for_auto_switching": "Otomatik anahtarlama için etkinleştirin",
   "enable_mempool_api": "Doğru ücretler ve tarihler için Mempool API'si",
   "enable_replace_by_fee": "Farklı Değiştir'i Etkinleştir",
   "enable_silent_payments_scanning": "Bahşiş ulaşılıncaya kadar sessiz ödemeleri taramaya başlayın",

res/values/strings_uk.arb

@@ -306,7 +306,9 @@
   "electrum_address_disclaimer": "Ми створюємо нові адреси щоразу, коли ви використовуєте їх, але попередні адреси продовжують працювати",
   "email_address": "Адреса електронної пошти",
   "enable": "Ввімкнути",
+  "enable_auto_node_switching": "Увімкнути автоматичний перемикач вузлів",
   "enable_builtin_tor": "Увімкнути вбудований tor",
+  "enable_for_auto_switching": "Увімкнути автоматичне перемикання",
   "enable_mempool_api": "API Mempool для точних зборів та дат",
   "enable_replace_by_fee": "Увімкнути заміну з комісією",
   "enable_silent_payments_scanning": "Почніть сканувати мовчазні платежі, поки не буде досягнуто наконечника",

res/values/strings_ur.arb

@@ -306,7 +306,9 @@
   "electrum_address_disclaimer": "جب بھی آپ ایک کا استعمال کرتے ہیں تو ہم نئے پتے تیار کرتے ہیں، لیکن پچھلے پتے کام کرتے رہتے ہیں۔",
   "email_address": "ای میل اڈریس",
   "enable": "قابل بنائیں",
+  "enable_auto_node_switching": "خودکار نوڈ سوئچنگ کو فعال کریں",
   "enable_builtin_tor": "بلٹٹی ان ٹور کو فعال کریں",
+  "enable_for_auto_switching": "آٹو سوئچنگ کے لئے قابل بنائیں",
   "enable_mempool_api": "درست فیسوں اور تاریخوں کے لئے میمپول API",
   "enable_replace_by_fee": "فی فیس کو تبدیل کریں",
   "enable_silent_payments_scanning": "خاموش ادائیگیوں کو اسکین کرنا شروع کریں ، جب تک کہ نوک نہ پہنچ جائے",

res/values/strings_vi.arb

@@ -305,7 +305,9 @@
   "electrum_address_disclaimer": "Chúng tôi tạo địa chỉ mới mỗi khi bạn sử dụng, nhưng các địa chỉ cũ vẫn tiếp tục hoạt động",
   "email_address": "Địa chỉ Email",
   "enable": "Cho phép",
+  "enable_auto_node_switching": "Bật chuyển đổi nút tự động",
   "enable_builtin_tor": "Bật Buildi-In Tor",
+  "enable_for_auto_switching": "Kích hoạt để chuyển đổi tự động",
   "enable_mempool_api": "API Mempool cho các khoản phí và ngày chính xác",
   "enable_replace_by_fee": "Bật Thay thế Bằng Phí",
   "enable_silent_payments_scanning": "Bật quét thanh toán im lặng",

res/values/strings_yo.arb

@@ -307,7 +307,9 @@
   "electrum_address_disclaimer": "A dá àwọn àdírẹ́sì títun ní gbogbo àwọn ìgbà t'ẹ́ lo ó kan ṣùgbọ́n ẹ lè tẹ̀síwájú lo àwọn àdírẹ́sì tẹ́lẹ̀tẹ́lẹ̀.",
   "email_address": "Àdírẹ́sì ímeèlì",
   "enable": "Mu ṣiṣẹ",
+  "enable_auto_node_switching": "Mu oju-ọna yiyọ laifọwọyi",
   "enable_builtin_tor": "Mu ṣiṣẹ",
+  "enable_for_auto_switching": "Mu ṣiṣẹ fun adaṣe-pada",
   "enable_mempool_api": "Mempool API fun awọn owo deede ati awọn ọjọ",
   "enable_replace_by_fee": "Mu ki o rọpo",
   "enable_silent_payments_scanning": "Bẹrẹ awọn sisanwo ipalọlọ, titi ti o fi de opin",

res/values/strings_zh.arb

@@ -306,7 +306,9 @@
   "electrum_address_disclaimer": "每次您使用一个地址时，我们都会生成新地址，但之前的地址仍然有效",
   "email_address": "电子邮件地址",
   "enable": "使能够",
+  "enable_auto_node_switching": "启用自动节点开关",
   "enable_builtin_tor": "启用内置的tor",
+  "enable_for_auto_switching": "启用自动开关",
   "enable_mempool_api": "Mempool API获得准确的费用和日期",
   "enable_replace_by_fee": "启用by-Fee替换",
   "enable_silent_payments_scanning": "开始扫描无声付款，直到达到提示",