dekun
201 lines
7.0 KiB
Python
201 lines
7.0 KiB
Python
"""行情网关：REST 对齐合约 + WS 推送盘口。"""
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from __future__ import annotations
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import asyncio
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import logging
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from typing import Any
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from ..config import Settings, get_settings
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from .book_cache import BookCache
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from .instruments import next_session_expiry_ymd, select_option_pair
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from .okx_rest import OkxRestClient
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from .okx_ws import OkxPublicWs
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from .types import MarketSnapshot, OptionPair
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logger = logging.getLogger(__name__)
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# 现价偏离当前行权价超过该点数则重选 ATM（ETH 期权常见步进 5）
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_ATM_DRIFT_POINTS = 5.0
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def _has_open_position() -> bool:
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try:
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from ..models.db import get_db
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row = get_db().fetchone("SELECT status FROM positions WHERE id=1")
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return bool(row and row["status"] == "open")
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except Exception:
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return False
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class MarketGateway:
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def __init__(self, settings: Settings | None = None) -> None:
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self.settings = settings or get_settings()
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self.cache = BookCache()
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proxy = self.settings.okx_http_proxy or None
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self.rest = OkxRestClient(self.settings.okx_rest_base, proxy=proxy)
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self.ws = OkxPublicWs(self.settings.okx_ws_public, self.cache, proxy=proxy)
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self._pair: OptionPair | None = None
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self._refresh_task: asyncio.Task[None] | None = None
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self._started = False
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@property
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def pair(self) -> OptionPair | None:
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return self._pair
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async def start(self) -> None:
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if self._started:
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return
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self._started = True
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await asyncio.to_thread(self.align_instruments)
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await self.ws.start()
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self._refresh_task = asyncio.create_task(self._refresh_loop(), name="market-align")
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async def stop(self) -> None:
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self._started = False
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if self._refresh_task:
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self._refresh_task.cancel()
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try:
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await self._refresh_task
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except asyncio.CancelledError:
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pass
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self._refresh_task = None
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await self.ws.stop()
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self.rest.close()
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def align_instruments(self) -> OptionPair | None:
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"""同步：拉期权列表，选次日到期 ATM Call/Put，REST 预热盘口，切换 WS 订阅。"""
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s = self.settings
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idx = self.rest.fetch_index_ticker(s.index_inst_id)
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mark = self.rest.fetch_mark_price(s.perp_inst_id) or idx
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if mark is None or mark <= 0:
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raise RuntimeError("无法获取 ETH 标记/指数价格，无法选 ATM")
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instruments = self.rest.fetch_option_instruments(s.option_inst_family)
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ymd = next_session_expiry_ymd()
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pair = select_option_pair(instruments, mark_px=float(mark), expiry_ymd=ymd)
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if pair is None:
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raise RuntimeError(f"未找到到期 {ymd} 的 ATM Call/Put 合约 pair (family={s.option_inst_family})")
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self._pair = pair
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self.cache.set_pair(pair)
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self.cache.set_index_px(idx)
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# REST 预热：永续 + Call + Put
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for inst in (s.perp_inst_id, pair.call_inst_id, pair.put_inst_id):
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bids, asks, ts = self.rest.fetch_books(inst, sz=5)
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self.cache.upsert_book(inst, bids=bids, asks=asks, ts_ms=ts)
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mp = self.rest.fetch_mark_price(inst)
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if mp:
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self.cache.set_mark_px(inst, mp)
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keep = {s.perp_inst_id, pair.call_inst_id, pair.put_inst_id}
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self.cache.drop_except(keep)
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self.ws.set_instruments([s.perp_inst_id, pair.call_inst_id, pair.put_inst_id])
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logger.info(
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"aligned pair expiry=%s strike=%s call=%s put=%s mark=%.2f",
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pair.expiry_ymd,
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pair.strike,
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pair.call_inst_id,
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pair.put_inst_id,
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mark,
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)
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return pair
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async def realign_async(self) -> OptionPair | None:
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old = self._pair
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pair = await asyncio.to_thread(self.align_instruments)
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if old is None or (
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pair
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and (
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pair.call_inst_id != old.call_inst_id
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or pair.put_inst_id != old.put_inst_id
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)
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):
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await self.ws.resubscribe(
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[
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self.settings.perp_inst_id,
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pair.call_inst_id,
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pair.put_inst_id,
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]
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)
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return pair
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def _mark_for_atm(self) -> float | None:
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snap = self.snapshot()
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if snap.perp and snap.perp.mark_px:
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return float(snap.perp.mark_px)
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if snap.index_px:
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return float(snap.index_px)
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if snap.perp and snap.perp.bid and snap.perp.ask:
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return (float(snap.perp.bid) + float(snap.perp.ask)) / 2
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return None
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def atm_needs_realign(self, mark_px: float | None = None) -> bool:
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"""到期日变了，或现价已偏离当前行权价超过阈值。"""
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if self._pair is None:
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return True
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want = next_session_expiry_ymd()
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if self._pair.expiry_ymd != want:
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return True
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mark = mark_px if mark_px is not None else self._mark_for_atm()
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if mark is None or mark <= 0:
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return False
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return abs(float(self._pair.strike) - float(mark)) >= _ATM_DRIFT_POINTS
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async def ensure_atm_async(self, *, force: bool = False) -> OptionPair | None:
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"""空仓时按现价对齐 ATM。有持仓时不切换，避免盯市合约被换掉。"""
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if _has_open_position():
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return self._pair
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if force or self.atm_needs_realign():
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logger.info(
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"ATM realign force=%s old_strike=%s",
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force,
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self._pair.strike if self._pair else None,
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)
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return await self.realign_async()
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return self._pair
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def snapshot(self) -> MarketSnapshot:
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return self.cache.snapshot(self.settings.perp_inst_id)
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def snapshot_dict(self) -> dict[str, Any]:
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return self.snapshot().to_dict()
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async def _refresh_loop(self) -> None:
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"""周期性刷新指数价；空仓时按到期/ATM 偏离重对齐。"""
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while True:
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await asyncio.sleep(30)
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try:
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idx = await asyncio.to_thread(
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self.rest.fetch_index_ticker, self.settings.index_inst_id
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)
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self.cache.set_index_px(idx)
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mark = await asyncio.to_thread(
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self.rest.fetch_mark_price, self.settings.perp_inst_id
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)
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if mark:
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self.cache.set_mark_px(self.settings.perp_inst_id, mark)
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await self.ensure_atm_async(force=False)
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except asyncio.CancelledError:
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raise
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except Exception as e:
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logger.warning("market refresh failed: %s", e)
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# 进程级单例（FastAPI lifespan 注入）
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_gateway: MarketGateway | None = None
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def get_gateway() -> MarketGateway:
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global _gateway
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if _gateway is None:
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_gateway = MarketGateway()
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return _gateway
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def set_gateway(gw: MarketGateway | None) -> None:
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global _gateway
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_gateway = gw
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