MOB-1993 - Handle nonce fetch error

unstoppable-ios-app/domains-manager-ios/Extensions/Error.swift

@@ -20,11 +20,18 @@ extension Error {
                   case .notConnectedToInternet = networkError {
             title = String.Constants.connectionLost.localized()
             message = String.Constants.pleaseCheckInternetConnection.localized()
-        } else if let jrpcError = self as? NetworkService.JRPCError,
-                  case .failedFetchInfuraGasPrices = jrpcError {
-            title = String.Constants.gasFeeFailed.localized()
-            message = String.Constants.pleaseTryAgain.localized()
-        } else{
+        } else if let jrpcError = self as? NetworkService.JRPCError {
+            switch jrpcError {
+            case .failedFetchInfuraGasPrices:
+                title = String.Constants.gasFeeFailed.localized()
+                message = String.Constants.pleaseTryAgain.localized()
+            case .failedFetchNonce:
+                title = String.Constants.nonceFailed.localized()
+                message = String.Constants.pleaseTryAgain.localized()
+            default: title = String.Constants.somethingWentWrong.localized()
+                    message = String.Constants.pleaseTryAgain.localized()
+            }
+        } else {
             title = String.Constants.somethingWentWrong.localized()
             message = String.Constants.pleaseTryAgain.localized()
         }

unstoppable-ios-app/domains-manager-ios/Extensions/Extension-String+Preview.swift

@@ -402,6 +402,7 @@ extension String {
         static let transactionFailed = "TRANSACTION_FAILED"
         static let connectionLost = "CONNECTION_LOST"
         static let gasFeeFailed = "GAS_FEE_FETCH_FAILED"
+        static let nonceFailed = "NONCE_FETCH_FAILED"
         static let pleaseCheckInternetConnection = "PLEASE_CHECK_INTERNET_CONNECTION"
         static let failedToPickImageFromPhotoLibraryErrorMessage = "FAILED_TO_PICK_IMAGE_FROM_PHOTO_LIBRARY_ERROR_MESSAGE"
         static let unableToCreateAccount = "UNABLE_TO_CREATE_ACCOUNT"

unstoppable-ios-app/domains-manager-ios/Modules/Home/SendCryptoAsset/CryptoSender/EVMCryptoSender.swift

@@ -80,15 +80,9 @@ extension EVMCryptoSender {
 
     private func fetchGasPrices(chainId: Int) async throws -> EstimatedGasPrices {
         // here routes to Status or Infura source
-
-        let prices: EstimatedGasPrices
-        do {
-            prices = try await NetworkService().fetchInfuraGasPrices(chainId: chainId)
-        } catch {
-            try await Task.sleep(nanoseconds: 500_000_000)
-            return try await NetworkService().fetchInfuraGasPrices(chainId: chainId)
+        try await NetworkService().doubleAttempt {
+            try await NetworkService().fetchInfuraGasPrices(chainId: chainId)
         }
-        return prices
     }
 }
 

unstoppable-ios-app/domains-manager-ios/Modules/Home/SendCryptoAsset/CryptoSender/JRPC_Client.swift

@@ -12,40 +12,27 @@ struct JRPC_Client {
     static let instance = JRPC_Client()
     private init() { }
 
-    enum Error: Swift.Error {
-        case failedFetchGas
-        case lowAllowance
-        case failedFetchGasLimit
-    }
-
     func fetchNonce(address: HexAddress, chainId: Int) async throws -> EthereumQuantity {
-        guard let nonce = await fetchNonce(address: address, chainId: chainId),
-              let nonceBig = BigUInt(nonce.droppedHexPrefix, radix: 16) else {
-            throw WalletConnectRequestError.failedFetchNonce
+        let nonceString = try await NetworkService().doubleAttempt {
+            try await NetworkService().getTransactionCount(address: address,
+                                                           chainId: chainId)
         }
-        return EthereumQuantity(quantity: nonceBig)
-    }
-
-    func fetchNonce(address: HexAddress, chainId: Int) async -> String? {
-        guard let nonceString = try? await NetworkService().getTransactionCount(address: address,
-                                                                     chainId: chainId) else {
-            Debugger.printFailure("Failed to fetch nonce for address: \(address)", critical: true)
-            return nil
+        guard let nonceBig = BigUInt(nonceString.droppedHexPrefix, radix: 16) else {
+            throw NetworkService.JRPCError.failedFetchNonce
         }
-        Debugger.printInfo(topic: .WalletConnect, "Fetched nonce successfully: \(nonceString)")
-        return nonceString
+        return EthereumQuantity(quantity: nonceBig)
     }
-
+        
     func fetchGasPrice(chainId: Int) async throws -> EthereumQuantity {
         guard let gasPrice = try? await NetworkService().getGasPrice(chainId: chainId) else {
             Debugger.printFailure("Failed to fetch gasPrice", critical: false)
-            throw Self.Error.failedFetchGas
+            throw NetworkService.JRPCError.failedFetchGas
         }
         Debugger.printInfo(topic: .WalletConnect, "Fetched gasPrice successfully: \(gasPrice)")
         let gasPriceBigUInt = BigUInt(gasPrice.droppedHexPrefix, radix: 16)
 
         guard let gasPriceBigUInt else {
-            throw Self.Error.failedFetchGas
+            throw NetworkService.JRPCError.failedFetchGas
         }
         return EthereumQuantity(quantity: gasPriceBigUInt)
     }
@@ -56,7 +43,7 @@ struct JRPC_Client {
                                                                              chainId: chainId)
             guard let result = BigUInt(gasPriceString.droppedHexPrefix, radix: 16) else {
                 Debugger.printFailure("Failed to parse gas Estimate from: \(gasPriceString)", critical: true)
-                throw Self.Error.failedFetchGasLimit
+                throw NetworkService.JRPCError.failedFetchGasLimit
             }
             Debugger.printInfo(topic: .WalletConnect, "Fetched gas Estimate successfully: \(gasPriceString)")
             return EthereumQuantity(quantity: result)
@@ -65,10 +52,10 @@ struct JRPC_Client {
                 switch jrpcError {
                 case .genericError(let message):
                     Debugger.printFailure("Failed to fetch gas Estimate, message: \(message)", critical: false)
-                    throw JRPC_Client.Error.failedFetchGas
+                    throw NetworkService.JRPCError.failedFetchGas
                 case .gasRequiredExceedsAllowance:
                     Debugger.printFailure("Failed to fetch gas Estimate because of Low Allowance Error", critical: false)
-                    throw JRPC_Client.Error.lowAllowance
+                    throw NetworkService.JRPCError.lowAllowance
                 default: throw WalletConnectRequestError.failedFetchGas
                 }
             } else {

unstoppable-ios-app/domains-manager-ios/Services/Networking/NetworkService.swift

@@ -320,8 +320,12 @@ extension NetworkService {
         case failedGetStatus
         case failedParseStatusPrices
         case failedFetchInfuraGasPrices
+        case failedFetchNonce
         case failedParseInfuraPrices
         case failedEncodeTxParameters
+        case failedFetchGas
+        case lowAllowance
+        case failedFetchGasLimit
         case unknownChain
 
         init(message: String) {
@@ -333,6 +337,17 @@ extension NetworkService {
         }
     }
 
+    func doubleAttempt<T>(fetchingAction: (() async throws -> T) ) async throws -> T {
+        let fetched: T
+        do {
+            fetched = try await fetchingAction()
+        } catch {
+            try await Task.sleep(nanoseconds: 500_000_000)
+            fetched = try await fetchingAction()
+        }
+        return fetched
+    }
+
     func getJRPCRequest(chainId: Int,
                         requestInfo: JRPCRequestInfo) async throws -> String {
 
@@ -356,10 +371,15 @@ extension NetworkService {
 
     func getTransactionCount(address: HexAddress,
                              chainId: Int) async throws -> String {
-
-        try await getJRPCRequest(chainId: chainId,
-                       requestInfo: JRPCRequestInfo(name: "eth_getTransactionCount",
-                                                    paramsBuilder: { "[\"\(address)\", \"latest\"]"} ))
+        let countString: String
+        do {
+            countString = try await getJRPCRequest(chainId: chainId,
+                                     requestInfo: JRPCRequestInfo(name: "eth_getTransactionCount",
+                                                                  paramsBuilder: { "[\"\(address)\", \"latest\"]"} ))
+        } catch {
+            throw JRPCError.failedFetchNonce
+        }
+        return countString
     }
 
     func getGasEstimation(tx: EthereumTransaction,

unstoppable-ios-app/domains-manager-ios/Services/WalletConnect/WalletConnectService_V2/WalletConnectServiceV2.swift

@@ -856,19 +856,14 @@ extension WalletConnectServiceV2: WalletConnectV2RequestHandlingServiceProtocol
         guard transaction.nonce == nil else {
             return transaction
         }
-
-        guard let nonce = await fetchNonce(transaction: transaction, chainId: chainId),
-              let nonceBig = BigUInt(nonce.droppedHexPrefix, radix: 16) else {
-            throw WalletConnectRequestError.failedFetchNonce
-        }
         var newTx = transaction
-        newTx.nonce = EthereumQuantity(quantity: nonceBig)
+        newTx.nonce = try await fetchNonce(transaction: transaction, chainId: chainId)
         return newTx
     }
 
-    private func fetchNonce(transaction: EthereumTransaction, chainId: Int) async -> String? {
-        guard let addressString = transaction.from?.hex() else { return nil }
-        return await JRPC_Client.instance.fetchNonce(address: addressString, chainId: chainId)
+    private func fetchNonce(transaction: EthereumTransaction, chainId: Int) async throws -> EthereumQuantity {
+        guard let addressString = transaction.from?.hex() else { throw WalletConnectRequestError.failedFetchNonce }
+        return try await JRPC_Client.instance.fetchNonce(address: addressString, chainId: chainId)
     }
 }
 

unstoppable-ios-app/domains-manager-ios/SupportingFiles/Localization/en.lproj/Localizable.strings

@@ -68,6 +68,7 @@
 "TRANSACTION_FAILED" = "Transaction Failed";
 "CONNECTION_LOST" = "Connection lost";
 "GAS_FEE_FETCH_FAILED" = "Failed to obtain current gas fees";
+"NONCE_FETCH_FAILED" = "Failed to obtain current nonce for the wallet address";
 "PLEASE_CHECK_INTERNET_CONNECTION" = "Please check your connection and try again.";
 "FAILED_TO_PICK_IMAGE_FROM_PHOTO_LIBRARY_ERROR_MESSAGE" = "Unexpected error occurred when tried to use selected image";
 "UNABLE_TO_CREATE_ACCOUNT" = "Unable to create account";