Add ETH and USDC balance check before start/restart bot and autoswap

src/Managing.Api/appsettings.Production.json

@@ -14,8 +14,8 @@
   },
   "Web3Proxy": {
     "BaseUrl": "http://srv-captain--web3-proxy:4111",
-    "MaxRetryAttempts": 3,
+    "MaxRetryAttempts": 2,
-    "RetryDelayMs": 1000,
+    "RetryDelayMs": 1500,
     "TimeoutSeconds": 30
   },
   "Serilog": {

src/Managing.Api/appsettings.Sandbox.json

@@ -19,8 +19,8 @@
   },
   "Web3Proxy": {
     "BaseUrl": "http://srv-captain--web3-proxy:4111",
-    "MaxRetryAttempts": 3,
+    "MaxRetryAttempts": 2,
-    "RetryDelayMs": 1000,
+    "RetryDelayMs": 1500,
     "TimeoutSeconds": 30
   },
   "Serilog": {

src/Managing.Api/appsettings.json

@@ -22,8 +22,8 @@
   },
   "Web3Proxy": {
     "BaseUrl": "http://localhost:4111",
-    "MaxRetryAttempts": 3,
+    "MaxRetryAttempts": 2,
-    "RetryDelayMs": 1000,
+    "RetryDelayMs": 1500,
     "TimeoutSeconds": 30
   },
   "Kaigen": {

src/Managing.Application.Abstractions/Services/IExchangeService.cs

@@ -45,7 +45,7 @@ public interface IExchangeService
     decimal GetVolume(Account account, Ticker ticker);
     Task<List<Trade>> GetTrades(Account account, Ticker ticker);
     Task<bool> CancelOrder(Account account, Ticker ticker);
-    decimal GetFee(Account account, bool isForPaperTrading = false);
+    Task<decimal> GetFee(Account account, bool isForPaperTrading = false);
     Task<Candle> GetCandle(Account account, Ticker ticker, DateTime date);
     Task<decimal> GetQuantityInPosition(Account account, Ticker ticker);
 

src/Managing.Application.Abstractions/Services/IWeb3ProxyService.cs

@@ -17,5 +17,7 @@ namespace Managing.Application.Abstractions.Services
         Task<SwapInfos> SendTokenAsync(string senderAddress, string recipientAddress, Ticker ticker, decimal amount, int? chainId = null);
         
         Task<List<Balance>> GetWalletBalanceAsync(string address, Ticker[] assets, string[] chains);
+        
+        Task<decimal> GetEstimatedGasFeeUsdAsync();
     }
 }

src/Managing.Application/Abstractions/IBotService.cs

@@ -1,3 +1,5 @@
+using Managing.Application.Bots.Models;
+using Managing.Domain.Accounts;
 using Managing.Domain.Bots;
 using Managing.Domain.Trades;
 using static Managing.Common.Enums;
@@ -44,4 +46,11 @@ public interface IBotService
         string? agentName = null,
         string sortBy = "CreateDate",
         string sortDirection = "Desc");
+
+    /// <summary>
+    /// Checks USDC and ETH balances for EVM/GMX V2 accounts
+    /// </summary>
+    /// <param name="account">The account to check balances for</param>
+    /// <returns>Balance check result</returns>
+    Task<BalanceCheckResult> CheckAccountBalancesAsync(Account account);
 }

src/Managing.Application/Bots/Grains/AgentGrain.cs

@@ -5,6 +5,7 @@ using Managing.Application.Abstractions.Services;
 using Managing.Application.Bots.Models;
 using Managing.Application.Orleans;
 using Managing.Common;
+using Managing.Core.Exceptions;
 using Managing.Domain.Statistics;
 using Microsoft.Extensions.Logging;
 using static Managing.Common.Enums;
@@ -236,8 +237,6 @@ public class AgentGrain : Grain, IAgentGrain
     }
 
     public async Task<BalanceCheckResult> CheckAndEnsureEthBalanceAsync(Guid requestingBotId, string accountName)
-    {
-        try
     {
         // Check if a swap is already in progress
         if (_state.State.IsSwapInProgress)
@@ -306,17 +305,28 @@ public class AgentGrain : Grain, IAgentGrain
         }
 
         // If ETH balance is sufficient, return success
-            if (balanceData.EthValueInUsd >= Constants.GMX.Config.MinimumEthBalance)
+        if (balanceData.EthValueInUsd >= Constants.GMX.Config.MinimumTradeEthBalanceUsd)
         {
             return new BalanceCheckResult
             {
                 IsSuccessful = true,
                 FailureReason = BalanceCheckFailureReason.None,
-                    Message = "Balance check successful",
+                Message = "Balance check successful - Enough ETH balance for trading",
                 ShouldStopBot = false
             };
         }
 
+        if (balanceData.EthValueInUsd < Constants.GMX.Config.MinimumSwapEthBalanceUsd)
+        {
+            return new BalanceCheckResult
+            {
+                IsSuccessful = false,
+                FailureReason = BalanceCheckFailureReason.InsufficientEthBelowMinimum,
+                Message = "ETH balance below minimum required amount",
+                ShouldStopBot = true
+            };
+        }
+
         // Check if we have enough USDC for swap (need at least 5 USD for swap)
         if (balanceData.UsdcValue <
             (Constants.GMX.Config.MinimumPositionAmount + (decimal)Constants.GMX.Config.AutoSwapAmount))
@@ -345,17 +355,6 @@ public class AgentGrain : Grain, IAgentGrain
             // Get user for the swap
             var userId = (int)this.GetPrimaryKeyLong();
             var user = await _userService.GetUserByIdAsync(userId);
-                if (user == null)
-                {
-                    _logger.LogError("User {UserId} not found for swap operation", userId);
-                    return new BalanceCheckResult
-                    {
-                        IsSuccessful = false,
-                        FailureReason = BalanceCheckFailureReason.BalanceFetchError,
-                        Message = "User not found for swap operation",
-                        ShouldStopBot = false
-                    };
-                }
 
             // Perform the swap
             var swapInfo = await _accountService.SwapGmxTokensAsync(user, accountName,
@@ -387,10 +386,39 @@ public class AgentGrain : Grain, IAgentGrain
                     IsSuccessful = false,
                     FailureReason = BalanceCheckFailureReason.SwapExecutionError,
                     Message = swapInfo.Error ?? swapInfo.Message ?? "Swap execution failed",
-                        ShouldStopBot = false
+                    ShouldStopBot = true
                 };
             }
         }
+        catch (InvalidOperationException ex) when (ex.InnerException is InsufficientFundsException insufficientFundsEx)
+        {
+            // Handle allowance exception (insufficient ETH for gas fees)
+            _logger.LogError(insufficientFundsEx,
+                "Insufficient funds during autoswap for agent {UserId}: {ErrorMessage}",
+                this.GetPrimaryKeyLong(), insufficientFundsEx.Message);
+
+            return new BalanceCheckResult
+            {
+                IsSuccessful = false,
+                FailureReason = BalanceCheckFailureReason.SwapExecutionError,
+                Message = insufficientFundsEx.UserMessage ??
+                          "Insufficient ETH for gas fees during autoswap. Bot cannot continue trading.",
+                ShouldStopBot = true
+            };
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Error during autoswap for agent {UserId}, bot {RequestingBotId}",
+                this.GetPrimaryKeyLong(), requestingBotId);
+
+            return new BalanceCheckResult
+            {
+                IsSuccessful = false,
+                FailureReason = BalanceCheckFailureReason.SwapExecutionError,
+                Message = ex.Message,
+                ShouldStopBot = true
+            };
+        }
         finally
         {
             // Always clear the swap in progress flag
@@ -398,24 +426,6 @@ public class AgentGrain : Grain, IAgentGrain
             await _state.WriteStateAsync();
         }
     }
-        catch (Exception ex)
-        {
-            _logger.LogError(ex, "Error checking/ensuring ETH balance for agent {UserId}, bot {RequestingBotId}",
-                this.GetPrimaryKeyLong(), requestingBotId);
-
-            // Clear swap in progress flag on error
-            _state.State.IsSwapInProgress = false;
-            await _state.WriteStateAsync();
-
-            return new BalanceCheckResult
-            {
-                IsSuccessful = false,
-                FailureReason = BalanceCheckFailureReason.BalanceFetchError,
-                Message = ex.Message,
-                ShouldStopBot = false
-            };
-        }
-    }
 
     /// <summary>
     /// Gets cached balance data or fetches fresh data if cache is invalid/expired

src/Managing.Application/Bots/Models/AgentGrainState.cs

@@ -1,94 +1,110 @@
+#nullable enable
 namespace Managing.Application.Bots.Models
 {
+    [GenerateSerializer]
     public class AgentGrainState
     {
-        public string AgentName { get; set; }
+        [Id(0)] public string AgentName { get; set; } = string.Empty;
-        public HashSet<Guid> BotIds { get; set; } = new HashSet<Guid>();
+        [Id(1)] public HashSet<Guid> BotIds { get; set; } = new HashSet<Guid>();
 
         /// <summary>
         /// Tracks if a swap operation is currently in progress to prevent multiple simultaneous swaps
         /// </summary>
+        [Id(2)]
         public bool IsSwapInProgress { get; set; } = false;
 
         /// <summary>
         /// Timestamp of the last swap operation to implement cooldown period
         /// </summary>
+        [Id(3)]
         public DateTime? LastSwapTime { get; set; } = null;
 
         /// <summary>
         /// Cached balance data to reduce external API calls
         /// </summary>
+        [Id(4)]
         public CachedBalanceData? CachedBalanceData { get; set; } = null;
     }
 
     /// <summary>
     /// Cached balance data to avoid repeated external API calls
     /// </summary>
+    [GenerateSerializer]
     public class CachedBalanceData
     {
         /// <summary>
         /// When the balance was last fetched
         /// </summary>
+        [Id(0)]
         public DateTime LastFetched { get; set; } = DateTime.UtcNow;
 
         /// <summary>
         /// The account name this balance data is for
         /// </summary>
+        [Id(1)]
         public string AccountName { get; set; } = string.Empty;
 
         /// <summary>
         /// ETH balance in USD
         /// </summary>
+        [Id(2)]
         public decimal EthValueInUsd { get; set; } = 0;
 
         /// <summary>
         /// USDC balance value
         /// </summary>
+        [Id(3)]
         public decimal UsdcValue { get; set; } = 0;
 
         /// <summary>
         /// Whether the cached data is still valid (less than 1 minute old)
         /// </summary>
         public bool IsValid => DateTime.UtcNow - LastFetched < TimeSpan.FromMinutes(1.5);
-}
+    }
 
-/// <summary>
+    /// <summary>
-/// Result of a balance check operation
+    /// Result of a balance check operation
-/// </summary>
+    /// </summary>
-public class BalanceCheckResult
+    [GenerateSerializer]
-{
+    public class BalanceCheckResult
+    {
         /// <summary>
         /// Whether the balance check was successful
         /// </summary>
+        [Id(0)]
         public bool IsSuccessful { get; set; }
 
         /// <summary>
         /// The reason for failure if not successful
         /// </summary>
+        [Id(1)]
         public BalanceCheckFailureReason FailureReason { get; set; }
 
         /// <summary>
         /// Additional details about the result
         /// </summary>
+        [Id(2)]
         public string Message { get; set; } = string.Empty;
 
         /// <summary>
         /// Whether the bot should stop due to this result
         /// </summary>
+        [Id(3)]
         public bool ShouldStopBot { get; set; }
-}
+    }
 
-/// <summary>
+    /// <summary>
-/// Reasons why a balance check might fail
+    /// Reasons why a balance check might fail
-/// </summary>
+    /// </summary>
-public enum BalanceCheckFailureReason
+    public enum BalanceCheckFailureReason
-{
+    {
         None,
         InsufficientUsdcBelowMinimum,
         InsufficientUsdcForSwap,
         SwapInProgress,
         SwapCooldownActive,
         BalanceFetchError,
-    SwapExecutionError
+        SwapExecutionError,
-}
+        InsufficientEthBelowMinimum
+    }
 }

src/Managing.Application/Bots/TradingBotBase.cs

@@ -6,6 +6,7 @@ using Managing.Application.Trading.Commands;
 using Managing.Application.Trading.Handlers;
 using Managing.Common;
 using Managing.Core;
+using Managing.Core.Exceptions;
 using Managing.Domain.Accounts;
 using Managing.Domain.Bots;
 using Managing.Domain.Candles;
@@ -822,6 +823,17 @@ public class TradingBotBase : ITradingBot
 
                 return null;
             }
+            catch (InsufficientFundsException ex)
+            {
+                // Handle insufficient funds errors with user-friendly messaging
+                SetSignalStatus(signal.Identifier, SignalStatus.Expired);
+                await LogWarning(ex.UserMessage);
+                
+                // Log the technical details for debugging
+                Logger.LogError(ex, "Insufficient funds error for signal {SignalId}: {ErrorMessage}", signal.Identifier, ex.Message);
+                
+                return null;
+            }
             catch (Exception ex)
             {
                 SetSignalStatus(signal.Identifier, SignalStatus.Expired);

src/Managing.Application/ManageBot/BotService.cs

@@ -3,7 +3,10 @@ using Managing.Application.Abstractions.Grains;
 using Managing.Application.Abstractions.Repositories;
 using Managing.Application.Abstractions.Services;
 using Managing.Application.Bots;
+using Managing.Application.Bots.Models;
+using Managing.Common;
 using Managing.Core;
+using Managing.Domain.Accounts;
 using Managing.Domain.Bots;
 using Managing.Domain.Scenarios;
 using Managing.Domain.Shared.Helpers;
@@ -103,12 +106,31 @@ namespace Managing.Application.ManageBot
                 }
 
                 var botGrain = _grainFactory.GetGrain<ILiveTradingBotGrain>(identifier);
+
+                // Check balances for EVM/GMX V2 bots before starting/restarting
+                var botConfig = await botGrain.GetConfiguration();
+                var account = await ServiceScopeHelpers.WithScopedService<IAccountService, Account>(
+                    _scopeFactory,
+                    async accountService => await accountService.GetAccount(botConfig.AccountName, true, false));
+
+                if (account.Exchange == TradingExchanges.Evm || account.Exchange == TradingExchanges.GmxV2)
+                {
+                    var balanceCheckResult = await CheckAccountBalancesAsync(account);
+                    if (!balanceCheckResult.IsSuccessful)
+                    {
+                        _tradingBotLogger.LogWarning(
+                            "Bot {Identifier} restart blocked due to insufficient balances: {Message}",
+                            identifier, balanceCheckResult.Message);
+                        throw new InvalidOperationException(balanceCheckResult.Message);
+                    }
+                }
+
+                var grainState = await botGrain.GetBotDataAsync();
+
                 if (previousStatus == BotStatus.Saved)
                 {
                     // First time startup
                     await botGrain.StartAsync();
-                    var grainState = await botGrain.GetBotDataAsync();
-                    var account = await botGrain.GetAccount();
                     var startupMessage = $"🚀 **Bot Started**\n\n" +
                                          $"🎯 **Agent:** {account.User.AgentName}\n" +
                                          $"🤖 **Bot Name:** {grainState.Config.Name}\n" +
@@ -122,8 +144,6 @@ namespace Managing.Application.ManageBot
                 {
                     // Restart (bot was previously down)
                     await botGrain.RestartAsync();
-                    var grainState = await botGrain.GetBotDataAsync();
-                    var account = await botGrain.GetAccount();
                     var restartMessage = $"🔄 **Bot Restarted**\n\n" +
                                          $"🎯 **Agent:** {account.User.AgentName}\n" +
                                          $"🤖 **Bot Name:** {grainState.Config.Name}\n" +
@@ -138,8 +158,8 @@ namespace Managing.Application.ManageBot
             }
             catch (Exception e)
             {
-                _tradingBotLogger.LogError(e, "Error restarting bot {Identifier}", identifier);
+                SentrySdk.CaptureException(e);
-                return BotStatus.Stopped;
+                throw;
             }
         }
 
@@ -297,7 +317,6 @@ namespace Managing.Application.ManageBot
                 var existingBot = await _botRepository.GetBotByIdentifierAsync(bot.Identifier);
 
 
-
                 // Check if bot already exists in database
                 await ServiceScopeHelpers.WithScopedService<IBotRepository>(
                     _scopeFactory,
@@ -365,5 +384,79 @@ namespace Managing.Application.ManageBot
                         sortDirection);
                 });
         }
+
+        /// <summary>
+        /// Checks USDC and ETH balances for EVM/GMX V2 accounts
+        /// </summary>
+        /// <param name="account">The account to check balances for</param>
+        /// <returns>Balance check result</returns>
+        public async Task<BalanceCheckResult> CheckAccountBalancesAsync(Account account)
+        {
+            try
+            {
+                return await ServiceScopeHelpers
+                    .WithScopedServices<IExchangeService, IAccountService, BalanceCheckResult>(
+                        _scopeFactory,
+                        async (exchangeService, accountService) =>
+                        {
+                            // Get current balances
+                            var balances = await exchangeService.GetBalances(account);
+                            var ethBalance = balances.FirstOrDefault(b => b.TokenName?.ToUpper() == "ETH");
+                            var usdcBalance = balances.FirstOrDefault(b => b.TokenName?.ToUpper() == "USDC");
+
+                            var ethValueInUsd = ethBalance?.Amount * ethBalance?.Price ?? 0;
+                            var usdcValue = usdcBalance?.Value ?? 0;
+
+                            _tradingBotLogger.LogInformation(
+                                "Balance check for bot restart - Account: {AccountName}, ETH: {EthValue:F2} USD, USDC: {UsdcValue:F2} USD",
+                                account.Name, ethValueInUsd, usdcValue);
+
+                            // Check USDC minimum balance
+                            if (usdcValue < Constants.GMX.Config.MinimumPositionAmount)
+                            {
+                                return new BalanceCheckResult
+                                {
+                                    IsSuccessful = false,
+                                    FailureReason = BalanceCheckFailureReason.InsufficientUsdcBelowMinimum,
+                                    Message =
+                                        $"USDC balance ({usdcValue:F2} USD) is below minimum required amount ({Constants.GMX.Config.MinimumPositionAmount} USD). Please add more USDC to restart the bot.",
+                                    ShouldStopBot = true
+                                };
+                            }
+
+                            // Check ETH minimum balance for trading
+                            if (ethValueInUsd < Constants.GMX.Config.MinimumTradeEthBalanceUsd)
+                            {
+                                return new BalanceCheckResult
+                                {
+                                    IsSuccessful = false,
+                                    FailureReason = BalanceCheckFailureReason.InsufficientEthBelowMinimum,
+                                    Message =
+                                        $"ETH balance ({ethValueInUsd:F2} USD) is below minimum required amount ({Constants.GMX.Config.MinimumTradeEthBalanceUsd} USD) for trading. Please add more ETH to restart the bot.",
+                                    ShouldStopBot = true
+                                };
+                            }
+
+                            return new BalanceCheckResult
+                            {
+                                IsSuccessful = true,
+                                FailureReason = BalanceCheckFailureReason.None,
+                                Message = "Balance check successful - Sufficient USDC and ETH balances",
+                                ShouldStopBot = false
+                            };
+                        });
+            }
+            catch (Exception ex)
+            {
+                _tradingBotLogger.LogError(ex, "Error checking balances for account {AccountName}", account.Name);
+                return new BalanceCheckResult
+                {
+                    IsSuccessful = false,
+                    FailureReason = BalanceCheckFailureReason.BalanceFetchError,
+                    Message = $"Failed to check balances: {ex.Message}",
+                    ShouldStopBot = false
+                };
+            }
+        }
     }
 }

src/Managing.Application/ManageBot/StartBotCommandHandler.cs

@@ -1,4 +1,5 @@
-using Managing.Application.Abstractions.Grains;
+using Managing.Application.Abstractions;
+using Managing.Application.Abstractions.Grains;
 using Managing.Application.Abstractions.Services;
 using Managing.Application.ManageBot.Commands;
 using Managing.Common;
@@ -11,12 +12,14 @@ namespace Managing.Application.ManageBot
     {
         private readonly IAccountService _accountService;
         private readonly IGrainFactory _grainFactory;
+        private readonly IBotService _botService;
 
         public StartBotCommandHandler(
-            IAccountService accountService, IGrainFactory grainFactory)
+            IAccountService accountService, IGrainFactory grainFactory, IBotService botService)
         {
             _accountService = accountService;
             _grainFactory = grainFactory;
+            _botService = botService;
         }
 
         public async Task<BotStatus> Handle(StartBotCommand request, CancellationToken cancellationToken)
@@ -39,13 +42,26 @@ namespace Managing.Application.ManageBot
                     $"Bot trading balance must be greater than {Constants.GMX.Config.MinimumPositionAmount}");
             }
 
-            var account = await _accountService.GetAccount(request.Config.AccountName, true, true);
+            var account = await _accountService.GetAccount(request.Config.AccountName, true, false);
 
             if (account == null)
             {
                 throw new Exception($"Account {request.Config.AccountName} not found");
             }
 
+            // Check balances for EVM/GMX V2 accounts before starting
+            if (account.Exchange == TradingExchanges.Evm || account.Exchange == TradingExchanges.GmxV2)
+            {
+                var balanceCheckResult = await _botService.CheckAccountBalancesAsync(account);
+                if (!balanceCheckResult.IsSuccessful)
+                {
+                    throw new InvalidOperationException(balanceCheckResult.Message);
+                }
+            }
+
+            // For other exchanges, keep the original USDC balance check
+            if (account.Exchange != TradingExchanges.Evm && account.Exchange != TradingExchanges.GmxV2)
+            {
                 var usdcBalance = account.Balances.FirstOrDefault(b => b.TokenName == Ticker.USDC.ToString());
 
                 if (usdcBalance == null ||
@@ -54,6 +70,7 @@ namespace Managing.Application.ManageBot
                 {
                     throw new Exception($"Account {request.Config.AccountName} has no USDC balance or not enough balance");
                 }
+            }
 
             try
             {

src/Managing.Application/Trading/Handlers/OpenPositionCommandHandler.cs

@@ -2,6 +2,7 @@
 using Managing.Application.Abstractions.Services;
 using Managing.Application.Trading.Commands;
 using Managing.Common;
+using Managing.Core.Exceptions;
 using Managing.Domain.Shared.Helpers;
 using Managing.Domain.Trades;
 using static Managing.Common.Enums;
@@ -19,7 +20,6 @@ namespace Managing.Application.Trading.Handlers
         {
             var account = await accountService.GetAccount(request.AccountName, hideSecrets: false, getBalance: false);
 
-
             var initiator = request.IsForPaperTrading ? PositionInitiator.PaperTrading : request.Initiator;
             var position = new Position(Guid.NewGuid(), request.AccountName, request.Direction,
                 request.Ticker,
@@ -44,6 +44,18 @@ namespace Managing.Application.Trading.Handlers
                     $"Bot trading balance of {balanceToRisk} USD is less than the minimum {Constants.GMX.Config.MinimumPositionAmount} USD required to trade");
             }
 
+            // Gas fee check for EVM exchanges
+            if (account.Exchange == TradingExchanges.Evm || account.Exchange == TradingExchanges.GmxV2)
+            {
+                var gasFeeUsd = await exchangeService.GetFee(account);
+                if (gasFeeUsd > Constants.GMX.Config.MaximumGasFeeUsd)
+                {
+                    throw new InsufficientFundsException(
+                        $"Gas fee too high for position opening: {gasFeeUsd:F2} USD (threshold: {Constants.GMX.Config.MaximumGasFeeUsd} USD). Position opening cancelled.",
+                        InsufficientFundsType.InsufficientEth);
+                }
+            }
+
             var price = request.IsForPaperTrading && request.Price.HasValue
                 ? request.Price.Value
                 : await exchangeService.GetPrice(account, request.Ticker, DateTime.Now);

src/Managing.Common/Constants.cs

@@ -108,7 +108,9 @@ namespace Managing.Common
                 }
 
                 public const decimal MinimumPositionAmount = 5m;
-                public const decimal MinimumEthBalance = 2m;
+                public const decimal MinimumTradeEthBalanceUsd = 1.5m;
+                public static decimal MinimumSwapEthBalanceUsd = 1m;
+                public const decimal MaximumGasFeeUsd = 1.5m;
                 public const double AutoSwapAmount = 3;
             }
 

src/Managing.Core/Exceptions/CustomExceptions.cs

@@ -76,3 +76,78 @@ public class ServiceUnavailableException : Exception
     {
     }
 }
+
+/// <summary>
+/// Exception thrown when there are insufficient funds or allowance for a transaction
+/// This typically indicates the user needs to add more ETH for gas or approve token spending
+/// </summary>
+public class InsufficientFundsException : Exception
+{
+    /// <summary>
+    /// The type of insufficient funds error
+    /// </summary>
+    public InsufficientFundsType ErrorType { get; }
+
+    /// <summary>
+    /// User-friendly message explaining what needs to be done
+    /// </summary>
+    public string UserMessage { get; }
+
+    public InsufficientFundsException(string errorMessage, InsufficientFundsType errorType) 
+        : base(errorMessage)
+    {
+        ErrorType = errorType;
+        UserMessage = GetUserFriendlyMessage(errorType);
+    }
+
+    private static string GetUserFriendlyMessage(InsufficientFundsType errorType)
+    {
+        return errorType switch
+        {
+            InsufficientFundsType.InsufficientEth => 
+                "❌ **Insufficient ETH for Gas Fees**\n" +
+                "Your wallet doesn't have enough ETH to pay for transaction gas fees.\n" +
+                "Please add ETH to your wallet and try again.",
+            
+            InsufficientFundsType.InsufficientAllowance => 
+                "❌ **Insufficient Token Allowance**\n" +
+                "The trading contract doesn't have permission to spend your tokens.\n" +
+                "Please approve token spending in your wallet and try again.",
+            
+            InsufficientFundsType.InsufficientBalance => 
+                "❌ **Insufficient Token Balance**\n" +
+                "Your wallet doesn't have enough tokens for this trade.\n" +
+                "Please add more tokens to your wallet and try again.",
+            
+            _ => "❌ **Transaction Failed**\n" +
+                 "The transaction failed due to insufficient funds.\n" +
+                 "Please check your wallet balance and try again."
+        };
+    }
+}
+
+/// <summary>
+/// Types of insufficient funds errors
+/// </summary>
+public enum InsufficientFundsType
+{
+    /// <summary>
+    /// Not enough ETH for gas fees
+    /// </summary>
+    InsufficientEth,
+    
+    /// <summary>
+    /// Token allowance is insufficient (ERC20: transfer amount exceeds allowance)
+    /// </summary>
+    InsufficientAllowance,
+    
+    /// <summary>
+    /// Token balance is insufficient
+    /// </summary>
+    InsufficientBalance,
+    
+    /// <summary>
+    /// General insufficient funds error
+    /// </summary>
+    General
+}

src/Managing.Infrastructure.Exchanges/Abstractions/IExchangeProcessor.cs

@@ -33,7 +33,7 @@ public interface IExchangeProcessor
     decimal GetVolume(Account account, Ticker ticker);
     Task<List<Trade>> GetTrades(Account account, Ticker ticker);
     Task<bool> CancelOrder(Account account, Ticker ticker);
-    decimal GetFee(Account account, bool isForPaperTrading = false);
+    Task<decimal> GetFee(Account account, bool isForPaperTrading = false);
     Task<Candle> GetCandle(Account account, Ticker ticker, DateTime date);
     Task<decimal> GetQuantityInPosition(Account account, Ticker ticker);
     Orderbook GetOrderbook(Account account, Ticker ticker);

src/Managing.Infrastructure.Exchanges/ExchangeService.cs

@@ -51,6 +51,21 @@ namespace Managing.Infrastructure.Exchanges
                     reduceOnly ? TradeStatus.PendingOpen : TradeStatus.Filled);
             }
 
+            // Check gas fees for EVM exchanges before opening position
+            if (IsEvmExchange(account))
+            {
+                var gasFeeUsd = await GetFee(account);
+                if (gasFeeUsd > 0.5m)
+                {
+                    _logger.LogWarning(
+                        $"Gas fee too high for position opening: {gasFeeUsd:F2} USD (threshold: 0.5 USD). Cancelling position opening.");
+                    
+                    // Return a cancelled trade
+                    return BuildEmptyTrade(ticker, price, quantity, direction, leverage, tradeType, currentDate.Value,
+                        TradeStatus.Cancelled);
+                }
+            }
+
             var processor = GetProcessor(account);
             return await processor.OpenTrade(account, ticker, direction, price, quantity, leverage, tradeType,
                 reduceOnly, isForPaperTrading, currentDate, ioc, stopLossPrice, takeProfitPrice);
@@ -242,10 +257,10 @@ namespace Managing.Infrastructure.Exchanges
             return await processor.GetBalance(account);
         }
 
-        public decimal GetFee(Account account, bool isForPaperTrading = false)
+        public async Task<decimal> GetFee(Account account, bool isForPaperTrading = false)
         {
             var processor = GetProcessor(account);
-            return processor.GetFee(account);
+            return await processor.GetFee(account);
         }
 
         public async Task<decimal> GetPrice(Account account, Ticker ticker, DateTime date)

src/Managing.Infrastructure.Exchanges/Exchanges/BaseProcessor.cs

@@ -15,7 +15,7 @@ namespace Managing.Infrastructure.Exchanges.Exchanges
         public abstract Task<decimal> GetBalance(Account account, bool isForPaperTrading = false);
         public abstract Task<Candle> GetCandle(Account account, Ticker ticker, DateTime date);
         public abstract Task<List<Candle>> GetCandles(Account account, Ticker ticker, DateTime startDate, Timeframe interval);
-        public abstract decimal GetFee(Account account, bool isForPaperTrading = false);
+        public abstract Task<decimal> GetFee(Account account, bool isForPaperTrading = false);
         public abstract Task<decimal> GetPrice(Account account, Ticker ticker, DateTime date);
         public abstract Task<decimal> GetCurrentPrice(Account account, Ticker ticker);
         public abstract Task<decimal> GetQuantityInPosition(Account account, Ticker ticker);

src/Managing.Infrastructure.Exchanges/Exchanges/EvmProcessor.cs

@@ -78,9 +78,9 @@ public class EvmProcessor : BaseProcessor
         return await _evmManager.GetCandles(ticker, startDate, interval, isFirstCall);
     }
 
-    public override decimal GetFee(Account account, bool isForPaperTrading = false)
+    public override async Task<decimal> GetFee(Account account, bool isForPaperTrading = false)
     {
-        return _evmManager.GetFee(Constants.Chains.Arbitrum).Result;
+        return await _evmManager.GetFee(Constants.Chains.Arbitrum);
     }
 
     public override async Task<decimal> GetPrice(Account account, Ticker ticker, DateTime date)

src/Managing.Infrastructure.Tests/ExchangeServicesTests.cs

@@ -137,10 +137,10 @@ namespace Managing.Infrastructure.Tests
 
         [Theory]
         [InlineData(TradingExchanges.Evm)]
-        public void Should_Return_Fee(TradingExchanges exchange)
+        public async Task Should_Return_Fee(TradingExchanges exchange)
         {
             var account = PrivateKeys.GetAccount();
-            var fee = _exchangeService.GetFee(account);
+            var fee = await _exchangeService.GetFee(account);
             Assert.IsType<decimal>(fee);
             Assert.True(fee > 0);
         }

src/Managing.Infrastructure.Web3/EvmManager.cs

@@ -891,11 +891,15 @@ public class EvmManager : IEvmManager
 
     public async Task<decimal> GetFee(string chainName)
     {
-        var chain = ChainService.GetChain(chainName);
+        try
-        var web3 = new Web3(chain.RpcUrl);
+        {
-        var etherPrice = (await GetPrices(new List<string> { "ethereum" }))["ethereum"]["usd"];
+            return await _web3ProxyService.GetEstimatedGasFeeUsdAsync();
-        var fee = await GmxService.GetFee(web3, etherPrice);
+        }
-        return fee;
+        catch (Exception ex)
+        {
+            Console.Error.WriteLine($"Error getting estimated gas fee: {ex.Message}");
+            return 0;
+        }
     }
 
     public async Task<List<Trade>> GetOrders(Account account, Ticker ticker)

src/Managing.Infrastructure.Web3/Models/Proxy/Web3ProxyError.cs

@@ -151,4 +151,28 @@ namespace Managing.Infrastructure.Evm.Models.Proxy
         [JsonPropertyName("balances")]
         public List<Balance> Balances { get; set; }
     }
+
+    /// <summary>
+    /// Response model for gas fee information
+    /// </summary>
+    public class GasFeeResponse : Web3ProxyResponse
+    {
+        /// <summary>
+        /// Estimated gas fee in USD
+        /// </summary>
+        [JsonPropertyName("estimatedGasFeeUsd")]
+        public double? EstimatedGasFeeUsd { get; set; }
+
+        /// <summary>
+        /// Current ETH price in USD
+        /// </summary>
+        [JsonPropertyName("ethPrice")]
+        public double? EthPrice { get; set; }
+
+        /// <summary>
+        /// Gas price in Gwei
+        /// </summary>
+        [JsonPropertyName("gasPriceGwei")]
+        public double? GasPriceGwei { get; set; }
+    }
 }

src/Managing.Infrastructure.Web3/Services/Web3ProxyService.cs

@@ -5,6 +5,7 @@ using System.Text;
 using System.Text.Json;
 using System.Web;
 using Managing.Application.Abstractions.Services;
+using Managing.Core.Exceptions;
 using Managing.Domain.Accounts;
 using Managing.Infrastructure.Evm.Models.Proxy;
 using Microsoft.Extensions.Logging;
@@ -77,6 +78,64 @@ namespace Managing.Infrastructure.Evm.Services
                    statusCode == HttpStatusCode.GatewayTimeout;
         }
 
+        /// <summary>
+        /// Checks if an error message indicates insufficient funds or allowance that should not be retried
+        /// </summary>
+        /// <param name="errorMessage">The error message to check</param>
+        /// <returns>True if this is a non-retryable insufficient funds error</returns>
+        private static bool IsInsufficientFundsError(string errorMessage)
+        {
+            if (string.IsNullOrEmpty(errorMessage))
+                return false;
+
+            var lowerError = errorMessage.ToLowerInvariant();
+            
+            // Check for common insufficient funds/allowance error patterns
+            return lowerError.Contains("erc20: transfer amount exceeds allowance") ||
+                   lowerError.Contains("insufficient funds") ||
+                   lowerError.Contains("insufficient balance") ||
+                   lowerError.Contains("execution reverted") && 
+                   (lowerError.Contains("allowance") || lowerError.Contains("balance")) ||
+                   lowerError.Contains("gas required exceeds allowance") ||
+                   lowerError.Contains("out of gas") ||
+                   lowerError.Contains("insufficient eth") ||
+                   lowerError.Contains("insufficient token");
+        }
+
+        /// <summary>
+        /// Determines the type of insufficient funds error based on the error message
+        /// </summary>
+        /// <param name="errorMessage">The error message to analyze</param>
+        /// <returns>The type of insufficient funds error</returns>
+        private static InsufficientFundsType GetInsufficientFundsType(string errorMessage)
+        {
+            if (string.IsNullOrEmpty(errorMessage))
+                return InsufficientFundsType.General;
+
+            var lowerError = errorMessage.ToLowerInvariant();
+
+            if (lowerError.Contains("erc20: transfer amount exceeds allowance") || 
+                lowerError.Contains("allowance"))
+            {
+                return InsufficientFundsType.InsufficientAllowance;
+            }
+
+            if (lowerError.Contains("gas required exceeds allowance") || 
+                lowerError.Contains("out of gas") || 
+                lowerError.Contains("insufficient eth"))
+            {
+                return InsufficientFundsType.InsufficientEth;
+            }
+
+            if (lowerError.Contains("insufficient balance") || 
+                lowerError.Contains("insufficient token"))
+            {
+                return InsufficientFundsType.InsufficientBalance;
+            }
+
+            return InsufficientFundsType.General;
+        }
+
         private async Task<T> ExecuteWithRetryAsync<T>(Func<Task<HttpResponseMessage>> httpCall, string operationName)
         {
             try
@@ -91,6 +150,11 @@ namespace Managing.Infrastructure.Evm.Services
                 var result = await response.Content.ReadFromJsonAsync<T>(_jsonOptions);
                 return result ?? throw new Web3ProxyException($"Failed to deserialize response for {operationName}");
             }
+            catch (InsufficientFundsException)
+            {
+                // Re-throw insufficient funds exceptions immediately without retrying
+                throw;
+            }
             catch (Exception ex) when (!(ex is Web3ProxyException))
             {
                 _logger.LogError(ex, "Operation {OperationName} failed after all retry attempts", operationName);
@@ -113,6 +177,11 @@ namespace Managing.Infrastructure.Evm.Services
                 var result = await response.Content.ReadFromJsonAsync<T>(_jsonOptions);
                 return result ?? throw new Web3ProxyException($"Failed to deserialize response for {operationName}");
             }
+            catch (InsufficientFundsException)
+            {
+                // Re-throw insufficient funds exceptions immediately without retrying
+                throw;
+            }
             catch (Exception ex) when (!(ex is Web3ProxyException))
             {
                 _logger.LogError(ex, "Operation {OperationName} failed after all retry attempts (IdempotencyKey: {IdempotencyKey})", operationName, idempotencyKey);
@@ -325,6 +394,23 @@ namespace Managing.Infrastructure.Evm.Services
             return response.Balances ?? new List<Balance>();
         }
 
+        public async Task<decimal> GetEstimatedGasFeeUsdAsync()
+        {
+            var response = await GetGmxServiceAsync<GasFeeResponse>("/gas-fee", null);
+
+            if (response == null)
+            {
+                throw new Web3ProxyException("Gas fee response is null");
+            }
+
+            if (!response.Success)
+            {
+                throw new Web3ProxyException($"Gas fee request failed: {response.Error}");
+            }
+
+            return (decimal)(response.EstimatedGasFeeUsd ?? 0);
+        }
+
         private async Task HandleErrorResponse(HttpResponseMessage response)
         {
             var statusCode = (int)response.StatusCode;
@@ -337,6 +423,13 @@ namespace Managing.Infrastructure.Evm.Services
 
                 if (errorResponse != null && !errorResponse.Success && !string.IsNullOrEmpty(errorResponse.Error))
                 {
+                    // Check if this is an insufficient funds error that should not be retried
+                    if (IsInsufficientFundsError(errorResponse.Error))
+                    {
+                        var errorType = GetInsufficientFundsType(errorResponse.Error);
+                        throw new InsufficientFundsException(errorResponse.Error, errorType);
+                    }
+
                     // Handle the standard Web3Proxy error format
                     throw new Web3ProxyException(errorResponse.Error);
                 }
@@ -351,20 +444,53 @@ namespace Managing.Infrastructure.Evm.Services
                     if (structuredErrorResponse?.ErrorDetails != null)
                     {
                         structuredErrorResponse.ErrorDetails.StatusCode = statusCode;
+                        
+                        // Check if this is an insufficient funds error that should not be retried
+                        if (IsInsufficientFundsError(structuredErrorResponse.ErrorDetails.Message))
+                        {
+                            var errorType = GetInsufficientFundsType(structuredErrorResponse.ErrorDetails.Message);
+                            throw new InsufficientFundsException(structuredErrorResponse.ErrorDetails.Message, errorType);
+                        }
+                        
                         throw new Web3ProxyException(structuredErrorResponse.ErrorDetails);
                     }
                 }
+                catch (Exception ex) when (ex is InsufficientFundsException)
+                {
+                    // Re-throw insufficient funds exceptions as-is
+                    throw;
+                }
                 catch
                 {
+                    // Check if the raw content contains insufficient funds errors
+                    if (IsInsufficientFundsError(content))
+                    {
+                        var errorType = GetInsufficientFundsType(content);
+                        throw new InsufficientFundsException(content, errorType);
+                    }
+                    
                     // If we couldn't parse as structured error, use the simple error or fallback
                     throw new Web3ProxyException($"HTTP error {statusCode}: {content}");
                 }
             }
+            catch (Exception ex) when (ex is InsufficientFundsException)
+            {
+                // Re-throw insufficient funds exceptions as-is
+                throw;
+            }
             catch (Exception ex) when (!(ex is Web3ProxyException))
             {
                 SentrySdk.CaptureException(ex);
                 // If we couldn't parse the error as JSON or another issue occurred
                 var content = await response.Content.ReadAsStringAsync();
+                
+                // Check if the raw content contains insufficient funds errors
+                if (IsInsufficientFundsError(content))
+                {
+                    var errorType = GetInsufficientFundsType(content);
+                    throw new InsufficientFundsException(content, errorType);
+                }
+                
                 throw new Web3ProxyException($"HTTP error {statusCode}: {content}");
             }
         }

src/Managing.Web3Proxy/src/plugins/custom/gmx.ts

@@ -26,7 +26,7 @@ import {decodeReferralCode, encodeReferralCode} from '../../generated/gmxsdk/uti
 import {formatUsd} from '../../generated/gmxsdk/utils/numbers/formatting.js';
 import {calculateDisplayDecimals} from '../../generated/gmxsdk/utils/numbers/index.js';
 import {handleError} from '../../utils/errorHandler.js';
-import {Abi, zeroHash} from 'viem';
+import {Abi, formatEther, parseEther, zeroHash} from 'viem';
 import {CLAIMABLE_FUNDING_AMOUNT} from '../../generated/gmxsdk/configs/dataStore.js';
 import {hashDataMap, hashString} from '../../generated/gmxsdk/utils/hash.js';
 import {ContractName, getContract} from '../../generated/gmxsdk/configs/contracts.js';
@@ -56,6 +56,7 @@ const MAX_CACHE_SIZE = 5; // Limit cache size to prevent memory issues
 const OPERATION_TIMEOUT = 30000; // 30 seconds timeout for operations
 
 const MEMORY_WARNING_THRESHOLD = 0.8; // Warn when memory usage exceeds 80%
+const MAX_GAS_FEE_USD = 1; // Maximum gas fee in USD (1 USDC)
 
 // Memory monitoring function
 function checkMemoryUsage() {
@@ -75,6 +76,118 @@ function checkMemoryUsage() {
     }
 }
 
+/**
+ * Checks if the user has sufficient ETH balance for gas fees
+ * @param sdk The GMX SDK client
+ * @param estimatedGasFee The estimated gas fee in wei
+ * @returns Object with balance check result and details
+ */
+async function checkGasFeeBalance(
+    sdk: GmxSdk,
+    estimatedGasFee: bigint
+): Promise<{
+    hasSufficientBalance: boolean;
+    ethBalance: string;
+    estimatedGasFeeUsd: number;
+    ethPrice: number;
+    errorMessage?: string;
+}> {
+    try {
+        // Get ETH balance using the public client
+        const ethBalance = await sdk.publicClient.getBalance({ address: sdk.account });
+        const ethBalanceFormatted = formatEther(ethBalance);
+        
+        // Get ETH price from the market data
+        const {tokensData} = await getMarketsInfoWithCache(sdk);
+        const ethTokenData = getTokenDataFromTicker("ETH", tokensData);
+        
+        if (!ethTokenData || !ethTokenData.prices?.minPrice) {
+            throw new Error("Unable to get ETH price for gas fee calculation");
+        }
+        
+        // Convert ETH price from 30 decimals to regular number
+        const ethPrice = Number(ethTokenData.prices.minPrice) / 1e30;
+        
+        // Calculate estimated gas fee in USD
+        const estimatedGasFeeEth = Number(formatEther(estimatedGasFee));
+        const estimatedGasFeeUsd = estimatedGasFeeEth * ethPrice;
+        
+        // Check if gas fee exceeds maximum allowed (1 USDC)
+        const hasSufficientBalance = estimatedGasFeeUsd <= MAX_GAS_FEE_USD;
+        
+        console.log(`⛽ Gas fee check:`, {
+            ethBalance: ethBalanceFormatted,
+            estimatedGasFeeEth: estimatedGasFeeEth.toFixed(6),
+            estimatedGasFeeUsd: estimatedGasFeeUsd.toFixed(2),
+            ethPrice: ethPrice.toFixed(2),
+            maxAllowedUsd: MAX_GAS_FEE_USD,
+            hasSufficientBalance
+        });
+        
+        return {
+            hasSufficientBalance,
+            ethBalance: ethBalanceFormatted,
+            estimatedGasFeeUsd,
+            ethPrice,
+            errorMessage: hasSufficientBalance ? undefined : 
+                `Gas fee too high: $${estimatedGasFeeUsd.toFixed(2)} exceeds maximum of $${MAX_GAS_FEE_USD}. Please wait for lower gas fees or add more ETH.`
+        };
+        
+    } catch (error) {
+        console.error('Error checking gas fee balance:', error);
+        return {
+            hasSufficientBalance: false,
+            ethBalance: "0",
+            estimatedGasFeeUsd: 0,
+            ethPrice: 0,
+            errorMessage: `Failed to check gas fee balance: ${error instanceof Error ? error.message : 'Unknown error'}`
+        };
+    }
+}
+
+/**
+ * Estimates gas fee for a position opening transaction
+ * @param sdk The GMX SDK client
+ * @param params The position increase parameters
+ * @returns Estimated gas fee in wei
+ */
+async function estimatePositionGasFee(
+    sdk: GmxSdk,
+    params: PositionIncreaseParams
+): Promise<bigint> {
+    try {
+        // Estimate gas for the position opening transaction
+        // This is a simplified estimation - in practice, you might want to use
+        // the actual transaction simulation or a more sophisticated gas estimation
+        const baseGasLimit = 500000n; // Base gas limit for position opening
+        
+        // Get gas price using the public client
+        const feeData = await sdk.publicClient.estimateFeesPerGas({
+            type: "legacy",
+            chain: sdk.chain,
+        });
+        const gasPrice = feeData.gasPrice || 0n;
+        
+        // Add some buffer for safety (20% more)
+        const estimatedGas = (baseGasLimit * 120n) / 100n;
+        const estimatedGasFee = estimatedGas * gasPrice;
+        
+        console.log(`⛽ Gas estimation:`, {
+            baseGasLimit: baseGasLimit.toString(),
+            gasPrice: gasPrice.toString(),
+            estimatedGas: estimatedGas.toString(),
+            estimatedGasFee: estimatedGasFee.toString()
+        });
+        
+        return estimatedGasFee;
+        
+    } catch (error) {
+        console.error('Error estimating gas fee:', error);
+        // Return a conservative estimate if estimation fails
+        return parseEther("0.01"); // 0.01 ETH as fallback
+    }
+}
+
 // Fallback RPC configuration
 const FALLBACK_RPC_URL = "https://radial-shy-cherry.arbitrum-mainnet.quiknode.pro/098e57e961b05b24bcde008c4ca02fff6fb13b51/";
 const PRIMARY_RPC_URL = "https://arb1.arbitrum.io/rpc";
@@ -518,6 +631,17 @@ export const openGmxPositionImpl = async (
                 direction: direction
             });
 
+            // Check gas fees before opening position
+            console.log('⛽ Checking gas fees before opening position...');
+            const estimatedGasFee = await estimatePositionGasFee(sdk, params);
+            const gasFeeCheck = await checkGasFeeBalance(sdk, estimatedGasFee);
+            
+            if (!gasFeeCheck.hasSufficientBalance) {
+                throw new Error(gasFeeCheck.errorMessage || 'Insufficient ETH balance for gas fees');
+            }
+            
+            console.log('✅ Gas fee check passed, proceeding with position opening...');
+
             console.log('🚀 Executing position order...');
 
             if (direction === TradeDirection.Long) {
@@ -596,6 +720,28 @@ export async function openGmxPosition(
             hash
         };
     } catch (error) {
+        // Handle gas fee specific errors
+        if (error instanceof Error && error.message.includes('Gas fee too high')) {
+            reply.status(400);
+            return {
+                success: false,
+                error: error.message,
+                errorType: 'GAS_FEE_TOO_HIGH',
+                suggestion: 'Please wait for lower gas fees or add more ETH to your wallet.'
+            };
+        }
+        
+        // Handle insufficient ETH balance errors
+        if (error instanceof Error && error.message.includes('Insufficient ETH balance')) {
+            reply.status(400);
+            return {
+                success: false,
+                error: error.message,
+                errorType: 'INSUFFICIENT_ETH_BALANCE',
+                suggestion: 'Please add more ETH to your wallet to cover gas fees.'
+            };
+        }
+        
         return handleError(this, reply, error, 'gmx/open-position');
     }
 }