Refactor SwapGmxTokens functionality into TradingService

- Moved SwapGmxTokensAsync method from AccountService to TradingService to centralize trading operations.
- Updated AccountController and AgentGrain to utilize the new TradingService method for swapping GMX tokens.
- Removed the old SwapGmxTokensAsync method from IAccountService and its implementation in AccountService.

src/Managing.Application/Trading/TradingService.cs

@@ -28,6 +28,7 @@ public class TradingService : ITradingService
     private readonly IEvmManager _evmManager;
     private readonly ILogger<TradingService> _logger;
     private readonly ISynthPredictionService _synthPredictionService;
+    private readonly IWeb3ProxyService _web3ProxyService;
 
     public TradingService(
         ITradingRepository tradingRepository,
@@ -39,7 +40,8 @@ public class TradingService : ITradingService
         IMessengerService messengerService,
         IStatisticRepository statisticRepository,
         IEvmManager evmManager,
-        ISynthPredictionService synthPredictionService)
+        ISynthPredictionService synthPredictionService,
+        IWeb3ProxyService web3ProxyService)
     {
         _tradingRepository = tradingRepository;
         _exchangeService = exchangeService;
@@ -51,6 +53,7 @@ public class TradingService : ITradingService
         _statisticRepository = statisticRepository;
         _evmManager = evmManager;
         _synthPredictionService = synthPredictionService;
+        _web3ProxyService = web3ProxyService;
     }
 
     public async Task DeleteScenarioAsync(string name)
@@ -447,4 +450,44 @@ public class TradingService : ITradingService
     {   
         return await _tradingRepository.GetPositionByUserIdAsync(userId);
     }
+
+    public async Task<SwapInfos> SwapGmxTokensAsync(User user, string accountName, Ticker fromTicker, Ticker toTicker,
+        double amount, string orderType = "market", double? triggerRatio = null, double allowedSlippage = 0.5)
+    {
+        // Get the account for the user
+        var account = await _accountService.GetAccountByUser(user, accountName, true, false);
+
+        if (account == null)
+        {
+            throw new ArgumentException($"Account '{accountName}' not found for user '{user.Name}'");
+        }
+
+        // Ensure the account has a valid address/key
+        if (string.IsNullOrEmpty(account.Key))
+        {
+            throw new ArgumentException($"Account '{accountName}' does not have a valid address");
+        }
+
+        try
+        {
+            // Call the Web3ProxyService to swap GMX tokens
+            var swapInfos = await _web3ProxyService.SwapGmxTokensAsync(
+                account.Key,
+                fromTicker,
+                toTicker,
+                amount,
+                orderType,
+                triggerRatio,
+                allowedSlippage
+            );
+
+            return swapInfos;
+        }
+        catch (Exception ex) when (!(ex is ArgumentException || ex is InvalidOperationException))
+        {
+            _logger.LogError(ex, "Error swapping GMX tokens for account {AccountName} and user {UserName}",
+                accountName, user.Name);
+            throw new InvalidOperationException($"Failed to swap GMX tokens: {ex.Message}", ex);
+        }
+    }
 }