增加k线图

backend/app/binance.py

@@ -212,5 +212,24 @@ class BinanceFuturesClient:
         sym_set = set(symbols)
         return {t["symbol"]: float(t["price"]) for t in tickers if t["symbol"] in sym_set}
 
+    async def get_daily_klines(self, symbol: str, limit: int = 300) -> list[dict]:
+        raw = await self._get(
+            "/fapi/v1/klines",
+            {"symbol": symbol.upper(), "interval": "1d", "limit": min(limit, 1500)},
+        )
+        candles = []
+        for k in raw or []:
+            candles.append(
+                {
+                    "time": int(k[0]),
+                    "open": float(k[1]),
+                    "high": float(k[2]),
+                    "low": float(k[3]),
+                    "close": float(k[4]),
+                    "volume": float(k[5]),
+                }
+            )
+        return candles
+
 
 binance_client = BinanceFuturesClient()