fix broken merge

core/exchanges/mexc_interface.py

@@ -236,7 +236,14 @@ class MEXCInterface(ExchangeInterface):
         params = {'symbol': formatted_symbol}
         
         response = self._send_public_request('GET', endpoint, params)
-                
+        
+        if response and isinstance(response, dict):
+            return response
+        elif response and isinstance(response, list) and len(response) > 0:
+            # Find the ticker for our symbol
+            for ticker in response:
+                if ticker.get('symbol') == formatted_symbol:
+                    return ticker
             else:
                 logger.error(f"Ticker data for {formatted_symbol} not found in response list.")
                 return None
@@ -296,6 +303,12 @@ class MEXCInterface(ExchangeInterface):
     
     def place_order(self, symbol: str, side: str, order_type: str, quantity: float, price: Optional[float] = None) -> Dict[str, Any]:
         """Place a new order on MEXC."""
+        try:
+            formatted_symbol = self._format_spot_symbol(symbol)
+            
+            # Validate symbol is supported
+            if not self.is_symbol_supported(formatted_symbol):
+                logger.error(f"Symbol {formatted_symbol} is not supported by MEXC")
                 return {}
             
             # Round quantity to MEXC precision requirements and ensure minimum order value