sync fees from API. usdc. trade works

check_ethusdc_precision.py

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+import requests
+
+# Check ETHUSDC precision requirements on MEXC
+try:
+    # Get symbol information from MEXC
+    resp = requests.get('https://api.mexc.com/api/v3/exchangeInfo')
+    data = resp.json()
+    
+    print('=== ETHUSDC SYMBOL INFORMATION ===')
+    
+    # Find ETHUSDC symbol
+    ethusdc_info = None
+    for symbol_info in data.get('symbols', []):
+        if symbol_info['symbol'] == 'ETHUSDC':
+            ethusdc_info = symbol_info
+            break
+    
+    if ethusdc_info:
+        print(f'Symbol: {ethusdc_info["symbol"]}')
+        print(f'Status: {ethusdc_info["status"]}')
+        print(f'Base Asset: {ethusdc_info["baseAsset"]}')
+        print(f'Quote Asset: {ethusdc_info["quoteAsset"]}')
+        print(f'Base Asset Precision: {ethusdc_info["baseAssetPrecision"]}')
+        print(f'Quote Asset Precision: {ethusdc_info["quoteAssetPrecision"]}')
+        
+        # Check order types
+        order_types = ethusdc_info.get('orderTypes', [])
+        print(f'Allowed Order Types: {order_types}')
+        
+        # Check filters for quantity and price precision
+        print('\nFilters:')
+        for filter_info in ethusdc_info.get('filters', []):
+            filter_type = filter_info['filterType']
+            print(f'  {filter_type}:')
+            for key, value in filter_info.items():
+                if key != 'filterType':
+                    print(f'    {key}: {value}')
+        
+        # Calculate proper quantity precision
+        print('\n=== QUANTITY FORMATTING RECOMMENDATIONS ===')
+        
+        # Find LOT_SIZE filter for minimum order size
+        lot_size_filter = None
+        min_notional_filter = None
+        for filter_info in ethusdc_info.get('filters', []):
+            if filter_info['filterType'] == 'LOT_SIZE':
+                lot_size_filter = filter_info
+            elif filter_info['filterType'] == 'MIN_NOTIONAL':
+                min_notional_filter = filter_info
+        
+        if lot_size_filter:
+            step_size = lot_size_filter['stepSize']
+            min_qty = lot_size_filter['minQty']
+            max_qty = lot_size_filter['maxQty']
+            print(f'Min Quantity: {min_qty}')
+            print(f'Max Quantity: {max_qty}')
+            print(f'Step Size: {step_size}')
+            
+            # Count decimal places in step size to determine precision
+            decimal_places = len(step_size.split('.')[-1].rstrip('0')) if '.' in step_size else 0
+            print(f'Required decimal places: {decimal_places}')
+            
+            # Test formatting our problematic quantity
+            test_quantity = 0.0028169119884018344
+            formatted_quantity = round(test_quantity, decimal_places)
+            print(f'Original quantity: {test_quantity}')
+            print(f'Formatted quantity: {formatted_quantity}')
+            print(f'String format: {formatted_quantity:.{decimal_places}f}')
+            
+            # Check if our quantity meets minimum
+            if formatted_quantity < float(min_qty):
+                print(f'❌ Quantity {formatted_quantity} is below minimum {min_qty}')
+                min_value_needed = float(min_qty) * 2665  # Approximate ETH price
+                print(f'💡 Need at least ${min_value_needed:.2f} to place minimum order')
+            else:
+                print(f'✅ Quantity {formatted_quantity} meets minimum requirement')
+        
+        if min_notional_filter:
+            min_notional = min_notional_filter['minNotional']
+            print(f'Minimum Notional Value: ${min_notional}')
+        
+    else:
+        print('❌ ETHUSDC symbol not found in exchange info')
+        
+except Exception as e:
+    print(f'Error: {e}')