first code

services/crypto_service.py

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+from typing import Dict, Any, Optional
+import logging
+from okx import OkxRestClient
+from .base_service import BaseService
+
+logger = logging.getLogger(__name__)
+
+class CryptoService(BaseService):
+    """加密货币价格服务"""
+    
+    def __init__(self, api_key: str = "", secret_key: str = "", passphrase: str = ""):
+        super().__init__()
+        # 对于公共数据，不需要API密钥
+        self.client = OkxRestClient(api_key, secret_key, passphrase) if api_key else OkxRestClient()
+    
+    def get_data(self, pair: str = "ETH-USDT") -> Optional[Dict[str, Any]]:
+        """获取指定交易对的价格数据"""
+        try:
+            # 使用正确的marketdata属性获取ticker数据
+            response = self.client.marketdata.get_ticker(instId=pair)
+            
+            if response and response.get('code') == '0' and response.get('data'):
+                ticker_data = response['data'][0]
+                
+                # 手动计算24小时百分比变化
+                last_price = float(ticker_data['last'])
+                open_price = float(ticker_data['open24h'])
+                pct_change = ((last_price - open_price) / open_price) * 100
+                
+                # 格式化数据
+                return {
+                    'pair': pair,
+                    'price': last_price,
+                    'change_24h': round(pct_change, 2),  # 保留两位小数
+                    'volume_24h': float(ticker_data.get('vol24h', 0)),
+                    'high_24h': float(ticker_data.get('high24h', 0)),
+                    'low_24h': float(ticker_data.get('low24h', 0)),
+                    'timestamp': ticker_data['ts']
+                }
+            else:
+                logger.error(f"获取{pair}价格失败: {response}")
+                return None
+                
+        except Exception as e:
+            logger.error(f"获取加密货币价格时出错: {e}")
+            return None
+