fix(trade): LIMIT calculated quantity algorithm

Closes #6

main.py

@@ -368,18 +368,23 @@ class MexcSpotTrade:
         order_type = order_type.upper()
         processed_kwargs = kwargs.copy()
 
+        # 记录未经过偏移的价格，以供LIMIT订单只有quoteOrderQty没有quantity的情况使用：
+        # 参数有price时直接使用，否则就为实时价格
+        clean_price = processed_kwargs.get("price")
+
         # 处理无price的情况，获取实时价格
         if order_type in ["LIMIT", "LIMIT_MAKER"] and "price" not in processed_kwargs:
             current_price = self.market.get_price(symbol)
             if current_price is None:
                 logger.error("无法获取实时价格，交易取消")
                 return None
+            clean_price = current_price
             # 防止挂单不成交
             if side == "BUY":
-                processed_kwargs["price"] = current_price * 1.01  # 买入加价0.5%
+                processed_kwargs["price"] = current_price * 1.01  # 买入加价1%
             elif side == "SELL":
-                processed_kwargs["price"] = current_price * 0.91  # 卖出减价0.5%
-            logger.info("使用调整0.5%%后价格作为限价: %f", processed_kwargs["price"])
+                processed_kwargs["price"] = current_price * 0.99  # 卖出减价1%
+            logger.info("使用调整1%%后价格作为限价: %f", processed_kwargs["price"])
 
         # 处理LIMIT订单只有quoteOrderQty没有quantity的情况
         if (
@@ -390,12 +395,7 @@ class MexcSpotTrade:
             try:
                 exchange_info = self.market.get_exchange_info(symbol)
                 quote_amount = float(processed_kwargs["quoteOrderQty"])
-                price = (
-                    float(current_price)
-                    if not current_price is None
-                    else float(processed_kwargs["price"])
-                )
-                quantity = quote_amount / price
+                quantity = quote_amount / clean_price
                 base_asset_precision = int(
                     exchange_info["symbols"][0]["baseAssetPrecision"]
                 )
@@ -403,7 +403,7 @@ class MexcSpotTrade:
                     exchange_info["symbols"][0]["quoteAmountPrecision"]
                 )
                 processed_quantity = self._tool_calculate_quantity(
-                    quantity, price, base_asset_precision, quote_amount_precision
+                    quantity, clean_price, base_asset_precision, quote_amount_precision
                 )
                 logger.info("根据quoteOrderQty计算quantity: %f", processed_quantity)
                 processed_kwargs["quantity"] = str(processed_quantity)