bsp_monitor: fetcher limit=1000, engine/main tweaks

bsp_monitor/fetcher.py

@@ -17,16 +17,21 @@ FETCH_LIMIT = 1000
 _symbols_cache: Optional[List[str]] = None
 
 
+# 只推送 BTC，其他币对暂不监控
+_SYMBOL_WHITELIST = {"BTC/USDT:USDT", "ETH/USDT:USDT", "SOL/USDT:USDT"}
+
+
 def get_symbols() -> list[str]:
-    """从 data_provider /health 获取所有可用币对（缓存）。"""
+    """获取要监控的币对列表（目前只监控 BTC）。"""
     global _symbols_cache
     if _symbols_cache is not None:
         return _symbols_cache
     try:
         resp = requests.get(f"{PROVIDER_URL}/health", timeout=10)
         resp.raise_for_status()
-        _symbols_cache = resp.json().get("symbols", [])
-        logger.info(f"获取到 {len(_symbols_cache)} 个币对")
+        all_symbols = resp.json().get("symbols", [])
+        _symbols_cache = [s for s in all_symbols if s in _SYMBOL_WHITELIST]
+        logger.info(f"获取到 {len(all_symbols)} 个币对，过滤后监控 {len(_symbols_cache)} 个: {_symbols_cache}")
     except Exception as e:
         logger.error(f"获取币对列表失败: {e}")
         _symbols_cache = ["BTC/USDT:USDT"]