feat: add UserDataStream with keepalive and reconnect loop

Made-with: Cursor

src/user_data_stream.py

@@ -0,0 +1,129 @@
+import asyncio
+from typing import Callable
+from binance import AsyncClient, BinanceSocketManager
+from loguru import logger
+
+_KEEPALIVE_INTERVAL = 30 * 60   # 30분 (listenKey 만료 60분의 절반)
+_RECONNECT_DELAY    = 5         # 재연결 대기 초
+
+_CLOSE_ORDER_TYPES = {"TAKE_PROFIT_MARKET", "STOP_MARKET"}
+
+
+class UserDataStream:
+    """
+    Binance Futures User Data Stream을 구독하여 주문 체결 이벤트를 처리한다.
+
+    - listenKey 30분 keepalive 백그라운드 태스크
+    - 네트워크 단절 시 무한 재연결 루프
+    - ORDER_TRADE_UPDATE 이벤트에서 청산 주문만 필터링하여 콜백 호출
+    """
+
+    def __init__(
+        self,
+        exchange,                        # BinanceFuturesClient 인스턴스
+        on_order_filled: Callable,       # bot._on_position_closed 콜백
+    ):
+        self._exchange = exchange
+        self._on_order_filled = on_order_filled
+        self._listen_key: str | None = None
+        self._keepalive_task: asyncio.Task | None = None
+
+    async def start(self, api_key: str, api_secret: str) -> None:
+        """User Data Stream 메인 루프 — 봇 종료 시까지 실행."""
+        client = await AsyncClient.create(
+            api_key=api_key,
+            api_secret=api_secret,
+        )
+        bm = BinanceSocketManager(client)
+        try:
+            await self._run_loop(bm)
+        finally:
+            await client.close_connection()
+
+    async def _run_loop(self, bm: BinanceSocketManager) -> None:
+        """listenKey 발급 → 연결 → 재연결 무한 루프."""
+        while True:
+            try:
+                self._listen_key = await self._exchange.create_listen_key()
+                logger.info(f"User Data Stream listenKey 발급: {self._listen_key[:8]}...")
+
+                self._keepalive_task = asyncio.create_task(
+                    self._keepalive_loop(self._listen_key)
+                )
+
+                async with bm.futures_user_socket(self._listen_key) as stream:
+                    logger.info("User Data Stream 연결 완료")
+                    async for msg in stream:
+                        await self._handle_message(msg)
+
+            except asyncio.CancelledError:
+                logger.info("User Data Stream 정상 종료")
+                if self._listen_key:
+                    await self._exchange.delete_listen_key(self._listen_key)
+                if self._keepalive_task:
+                    self._keepalive_task.cancel()
+                break
+
+            except Exception as e:
+                logger.warning(
+                    f"User Data Stream 끊김: {e} — "
+                    f"{_RECONNECT_DELAY}초 후 재연결"
+                )
+                if self._keepalive_task:
+                    self._keepalive_task.cancel()
+                    self._keepalive_task = None
+                await asyncio.sleep(_RECONNECT_DELAY)
+
+    async def _keepalive_loop(self, listen_key: str) -> None:
+        """30분마다 listenKey를 갱신한다."""
+        while True:
+            await asyncio.sleep(_KEEPALIVE_INTERVAL)
+            try:
+                await self._exchange.keepalive_listen_key(listen_key)
+                logger.debug("listenKey 갱신 완료")
+            except Exception as e:
+                logger.warning(f"listenKey 갱신 실패: {e} — 재연결 루프가 처리")
+                break
+
+    async def _handle_message(self, msg: dict) -> None:
+        """ORDER_TRADE_UPDATE 이벤트에서 청산 주문을 필터링하여 콜백을 호출한다."""
+        if msg.get("e") != "ORDER_TRADE_UPDATE":
+            return
+
+        order = msg.get("o", {})
+
+        # x: Execution Type, X: Order Status
+        if order.get("x") != "TRADE" or order.get("X") != "FILLED":
+            return
+
+        order_type   = order.get("o", "")
+        is_reduce    = order.get("R", False)
+        realized_pnl = float(order.get("rp", "0"))
+
+        # 청산 주문 판별: reduceOnly이거나, TP/SL 타입이거나, rp != 0
+        is_close = is_reduce or order_type in _CLOSE_ORDER_TYPES or realized_pnl != 0
+        if not is_close:
+            return
+
+        commission = abs(float(order.get("n", "0")))
+        net_pnl    = realized_pnl - commission
+        exit_price = float(order.get("ap", "0"))
+
+        if order_type == "TAKE_PROFIT_MARKET":
+            close_reason = "TP"
+        elif order_type == "STOP_MARKET":
+            close_reason = "SL"
+        else:
+            close_reason = "MANUAL"
+
+        logger.info(
+            f"청산 감지({close_reason}): exit={exit_price:.4f}, "
+            f"rp={realized_pnl:+.4f}, commission={commission:.4f}, "
+            f"net_pnl={net_pnl:+.4f}"
+        )
+
+        await self._on_order_filled(
+            net_pnl=net_pnl,
+            close_reason=close_reason,
+            exit_price=exit_price,
+        )