修复币本位期权残档判定：内在价值按币报价(S-K)/S，避免与美元点差混比误杀有效买一

Co-authored-by: Cursor <cursoragent@cursor.com>

lib/exchange/okx_options_lib.py

@@ -13,6 +13,7 @@ import ccxt
 from lib.options.options_pricing_lib import (
     expiry_breakeven_from_ask,
     idx_distance_to_be,
+    intrinsic_px_per_unit,
     is_shallow_itm,
     option_moneyness,
     option_moneyness_label,
@@ -251,15 +252,6 @@ def tick_sz_and_ct_mult(
     return tick_sz, ct_mult or 0.01
 
 
-def _intrinsic_px_per_unit(opt_type: str, strike: float, index_px: float) -> float | None:
-    o = (opt_type or "").upper()
-    if o == "C" and index_px > strike:
-        return float(index_px) - float(strike)
-    if o == "P" and index_px < strike:
-        return float(strike) - float(index_px)
-    return None
-
-
 def _resolve_chain_quote(
     *,
     ticker: dict[str, Any],
@@ -267,6 +259,7 @@ def _resolve_chain_quote(
     opt_type: str,
     strike: float,
     index_px: float,
+    inst_id: str | None = None,
 ) -> dict[str, Any]:
     """链列表报价:卖一缺失时用标记价/内在价值估算(深度实值常见无卖一)."""
     tick_sz = meta.get("tickSz")
@@ -276,12 +269,13 @@ def _resolve_chain_quote(
     ask_sz = _safe_float(ticker.get("askSz"))
     bid_sz = _safe_float(ticker.get("bidSz"))
     ask_estimated = False
+    iid = (inst_id or str(meta.get("instId") or "")).strip()
 
     if ask is None and mark is not None and mark > 0:
         ask = round_option_px(mark, tick_sz, "buy")
         ask_estimated = True
     if ask is None:
-        intrinsic = _intrinsic_px_per_unit(opt_type, strike, index_px)
+        intrinsic = intrinsic_px_per_unit(opt_type, strike, index_px, inst_id=iid or None)
         if intrinsic is not None and intrinsic > 0:
             ask = round_option_px(intrinsic, tick_sz, "buy")
             ask_estimated = True
@@ -289,7 +283,7 @@ def _resolve_chain_quote(
     if bid is None and mark is not None and mark > 0:
         bid = round_option_px(mark, tick_sz, "sell")
     if bid is None:
-        intrinsic = _intrinsic_px_per_unit(opt_type, strike, index_px)
+        intrinsic = intrinsic_px_per_unit(opt_type, strike, index_px, inst_id=iid or None)
         if intrinsic is not None and intrinsic > 0:
             bid = round_option_px(intrinsic, tick_sz, "sell")
 
@@ -878,6 +872,7 @@ def build_option_chain(
             opt_type=opt_type,
             strike=strike,
             index_px=idx,
+            inst_id=inst_id,
         )
         ask = q["ask"]
         bid = q["bid"]