Fix a bit the spot trading

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

@@ -29,32 +29,11 @@ public class CloseSpotPositionCommandHandler(
                 ? TradeDirection.Short
                 : TradeDirection.Long;
 
-            // For spot trading, determine swap direction for closing
-            // Long position: Swap Token -> USDC (sell token for USDC)
-            // Short position: Swap USDC -> Token (buy token with USDC)
-            Ticker fromTicker;
-            Ticker toTicker;
-            double swapAmount;
-
-            if (request.Position.OriginDirection == TradeDirection.Long)
-            {
-                fromTicker = request.Position.Ticker;
-                toTicker = Ticker.USDC;
-                swapAmount = (double)request.Position.Open.Quantity;
-            }
-            else
-            {
-                fromTicker = Ticker.USDC;
-                toTicker = request.Position.Ticker;
-                // For short, we need to calculate how much USDC to swap back
-                // This should be the original amount + profit/loss
-                var originalAmount = request.Position.Open.Price * request.Position.Open.Quantity;
-                swapAmount = (double)originalAmount;
-            }
-
             // For backtest/paper trading, simulate the swap without calling the exchange
             SwapInfos swapResult;
-            if (request.Position.TradingType == TradingType.BacktestSpot)
+            var isForBacktest = request.Position.TradingType == TradingType.BacktestSpot;
+
+            if (isForBacktest)
             {
                 // Simulate successful swap for backtest
                 swapResult = new SwapInfos
@@ -71,9 +50,9 @@ public class CloseSpotPositionCommandHandler(
                 swapResult = await tradingService.SwapGmxTokensAsync(
                     request.Position.User,
                     account.Name,
-                    fromTicker,
-                    toTicker,
-                    swapAmount,
+                    request.Position.Ticker,
+                    Ticker.USDC,
+                    (double)request.Position.Open.Quantity,
                     "market",
                     null,
                     0.5);
@@ -81,7 +60,8 @@ public class CloseSpotPositionCommandHandler(
 
             if (!swapResult.Success)
             {
-                throw new InvalidOperationException($"Failed to close spot position: {swapResult.Error ?? swapResult.Message}");
+                throw new InvalidOperationException(
+                    $"Failed to close spot position: {swapResult.Error ?? swapResult.Message}");
             }
 
             // Build the closing trade directly for backtest (no exchange call needed)
@@ -107,7 +87,10 @@ public class CloseSpotPositionCommandHandler(
             request.Position.AddUiFees(closingUiFees);
             request.Position.AddGasFees(Constants.GMX.Config.GasFeePerTransaction);
 
-            // For backtest, skip database update
+            if (!isForBacktest)
+            {
+                await tradingService.UpdatePositionAsync(request.Position);
+            }
 
             return request.Position;
         }
@@ -120,5 +103,4 @@ public class CloseSpotPositionCommandHandler(
             throw;
         }
     }
-}
-
+}