Refactor user settings management to remove IsGmxEnabled and DefaultExchange from updatable fields, introducing GmxSlippage instead. Update UserController, UserService, and related DTOs to reflect these changes, ensuring proper handling of user settings. Adjust database schema and migrations to accommodate the new GmxSlippage property, enhancing user customization options for trading configurations.

src/Managing.Application/Trading/TradingService.cs

@@ -455,7 +455,7 @@ public class TradingService : ITradingService
     }
 
     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)
+        double amount, string orderType = "market", double? triggerRatio = null, double? allowedSlippage = null)
     {
         // Get the account for the user
         var account = await _accountService.GetAccountByUser(user, accountName, true, false);
@@ -473,6 +473,14 @@ public class TradingService : ITradingService
 
         try
         {
+            // Get user's config to access default slippage value
+            var config = TradingBox.CreateConfigFromUserSettings(user);
+            
+            // Use provided allowedSlippage if specified, otherwise use user's GmxSlippage setting, or default from IndicatorComboConfig
+            var slippageToUse = (double)(allowedSlippage.HasValue 
+                ? (decimal)allowedSlippage.Value 
+                : (user.GmxSlippage ?? config.GmxSlippage));
+            
             // Call the Web3ProxyService to swap GMX tokens
             var swapInfos = await _web3ProxyService.SwapGmxTokensAsync(
                 account.Key,
@@ -481,7 +489,7 @@ public class TradingService : ITradingService
                 amount,
                 orderType,
                 triggerRatio,
-                allowedSlippage
+                slippageToUse
             );
 
             return swapInfos;