sync fees from API. usdc. trade works
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Dobromir Popov
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MEXC_FEE_SYNC_IMPLEMENTATION.md
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MEXC_FEE_SYNC_IMPLEMENTATION.md
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# MEXC API Fee Synchronization Implementation
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## Overview
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This implementation adds automatic synchronization of trading fees between the MEXC API and your local configuration files. The system will:
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1. **Fetch current trading fees** from MEXC API on startup
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2. **Automatically update** your `config.yaml` with the latest fees
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3. **Periodically sync** fees to keep them current
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4. **Maintain backup** of configuration files
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5. **Track sync history** for auditing
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## Features
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### ✅ Automatic Fee Retrieval
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- Fetches maker/taker commission rates from MEXC account API
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- Converts basis points to decimal percentages
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- Handles API errors gracefully with fallback values
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### ✅ Smart Configuration Updates
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- Only updates config when fees actually change
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- Creates timestamped backups before modifications
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- Preserves all other configuration settings
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- Adds metadata tracking when fees were last synced
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### ✅ Integration with Trading System
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- Automatically syncs on TradingExecutor startup
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- Reloads configuration after fee updates
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- Provides manual sync methods for testing
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- Includes sync status in trading statistics
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### ✅ Robust Error Handling
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- Graceful fallback to hardcoded values if API fails
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- Comprehensive logging of all sync operations
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- Detailed error reporting and recovery
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## Implementation Details
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### New Files Added
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1. **`core/config_sync.py`** - Main synchronization logic
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2. **`test_fee_sync.py`** - Test script for validation
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3. **`MEXC_FEE_SYNC_IMPLEMENTATION.md`** - This documentation
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### Enhanced Files
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1. **`NN/exchanges/mexc_interface.py`** - Added fee retrieval methods
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2. **`core/trading_executor.py`** - Integrated sync functionality
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## Usage
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### Automatic Synchronization (Default)
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When you start your trading system, fees will be automatically synced:
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```python
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# This now includes automatic fee sync on startup
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executor = TradingExecutor("config.yaml")
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```
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### Manual Synchronization
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```python
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# Force immediate sync
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sync_result = executor.sync_fees_with_api(force=True)
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# Check sync status
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status = executor.get_fee_sync_status()
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# Auto-sync if needed
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executor.auto_sync_fees_if_needed()
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```
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### Direct API Testing
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```bash
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# Test the fee sync functionality
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python test_fee_sync.py
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```
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## Configuration Changes
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### New Config Sections Added
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```yaml
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trading:
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trading_fees:
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maker: 0.0000 # Auto-updated from MEXC API
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taker: 0.0005 # Auto-updated from MEXC API
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default: 0.0005 # Auto-updated from MEXC API
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# New metadata section (auto-generated)
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fee_sync_metadata:
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last_sync: "2024-01-15T10:30:00"
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api_source: "mexc"
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sync_enabled: true
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api_commission_rates:
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maker: 0 # Raw basis points from API
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taker: 50 # Raw basis points from API
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```
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### Backup Files
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The system creates timestamped backups:
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- `config.yaml.backup_20240115_103000`
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- Keeps configuration history for safety
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### Sync History
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Detailed sync history is maintained in:
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- `logs/config_sync_history.json`
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- Contains last 100 sync operations
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- Useful for debugging and auditing
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## API Methods Added
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### MEXCInterface New Methods
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```python
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# Get account-level trading fees
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fees = mexc.get_trading_fees()
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# Returns: {'maker_rate': 0.0000, 'taker_rate': 0.0005, 'source': 'mexc_api'}
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# Get symbol-specific fees (future enhancement)
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fees = mexc.get_symbol_trading_fees("ETH/USDT")
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```
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### ConfigSynchronizer Methods
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```python
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# Manual fee sync
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sync_result = config_sync.sync_trading_fees(force=True)
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# Auto sync (respects timing intervals)
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success = config_sync.auto_sync_fees()
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# Get sync status and history
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status = config_sync.get_sync_status()
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# Enable/disable auto-sync
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config_sync.enable_auto_sync(True)
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```
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### TradingExecutor New Methods
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```python
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# Sync fees through trading executor
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result = executor.sync_fees_with_api(force=True)
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# Check if auto-sync is needed
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executor.auto_sync_fees_if_needed()
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# Get comprehensive sync status
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status = executor.get_fee_sync_status()
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```
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## Error Handling
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### API Connection Failures
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- Falls back to existing config values
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- Logs warnings but doesn't stop trading
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- Retries on next sync interval
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### Configuration File Issues
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- Creates backups before any changes
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- Validates config structure before saving
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- Recovers from backup if save fails
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### Fee Validation
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- Checks for reasonable fee ranges (0-1%)
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- Logs warnings for unusual fee changes
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- Requires significant change (>0.000001) to update
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## Sync Timing
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### Default Intervals
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- **Startup sync**: Immediate on TradingExecutor initialization
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- **Auto-sync interval**: Every 3600 seconds (1 hour)
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- **Manual sync**: Available anytime
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### Configurable Settings
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```python
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config_sync.sync_interval = 1800 # 30 minutes
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config_sync.backup_enabled = True
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```
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## Benefits
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### 1. **Always Current Fees**
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- No more outdated hardcoded fees
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- Automatic updates when MEXC changes rates
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- Accurate P&L calculations
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### 2. **Zero Maintenance**
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- Set up once, works automatically
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- No manual config file editing needed
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- Handles fee tier changes automatically
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### 3. **Audit Trail**
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- Complete history of all fee changes
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- Timestamped sync records
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- Easy troubleshooting and compliance
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### 4. **Safety First**
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- Configuration backups before changes
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- Graceful error handling
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- Can disable auto-sync if needed
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## Testing
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### Run Complete Test Suite
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```bash
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python test_fee_sync.py
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```
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### Test Output Example
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```
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=== Testing MEXC Fee Retrieval ===
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MEXC: Connection successful
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MEXC: Fetching trading fees...
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MEXC Trading Fees Retrieved:
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Maker Rate: 0.000%
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Taker Rate: 0.050%
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Source: mexc_api
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=== Testing Config Synchronization ===
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CONFIG SYNC: Fetching trading fees from MEXC API
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CONFIG SYNC: Updated taker fee: 0.0005 -> 0.0005
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CONFIG SYNC: Successfully synced trading fees
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=== Testing TradingExecutor Integration ===
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TRADING EXECUTOR: Performing initial fee synchronization with MEXC API
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TRADING EXECUTOR: Fee synchronization completed successfully
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TEST SUMMARY:
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MEXC API Fee Retrieval: PASS
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Config Synchronization: PASS
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TradingExecutor Integration: PASS
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ALL TESTS PASSED! Fee synchronization is working correctly.
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```
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## Next Steps
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### Immediate Use
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1. Run `python test_fee_sync.py` to verify setup
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2. Start your trading system normally
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3. Check logs for successful fee sync messages
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### Optional Enhancements
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1. Add symbol-specific fee rates
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2. Implement webhook notifications for fee changes
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3. Add GUI controls for sync management
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4. Export sync history to CSV/Excel
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## Security Notes
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- Uses existing MEXC API credentials from `.env`
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- Only reads account info (no trading permissions needed for fees)
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- Configuration backups protect against data loss
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- All sync operations are logged for audit
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## Troubleshooting
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### Common Issues
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1. **"No MEXC interface available"**
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- Check API credentials in `.env` file
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- Verify trading is enabled in config
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2. **"API returned fallback values"**
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- MEXC API may be temporarily unavailable
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- System continues with existing fees
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3. **"Failed to save updated config"**
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- Check file permissions on `config.yaml`
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- Ensure disk space is available
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### Debug Logging
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```python
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import logging
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logging.getLogger('core.config_sync').setLevel(logging.DEBUG)
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```
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This implementation provides a robust, automatic solution for keeping your trading fees synchronized with MEXC's current rates, ensuring accurate trading calculations and eliminating manual configuration maintenance.
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