fix期权链 Delta 改为从 opt-summary 拉取。

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

lib/exchange/okx_options_lib.py

@@ -799,6 +799,37 @@ def fetch_option_tickers(ex: ccxt.okx, inst_family: str) -> dict[str, dict[str,
     return out
 
 
+def fetch_option_summaries(ex: ccxt.okx, inst_family: str) -> dict[str, dict[str, Any]]:
+    """GET /api/v5/public/opt-summary — 含 delta / deltaBS 等希腊字母.
+    市场 tickers 不含 Delta,期权链展示必须走本接口.
+    """
+    out: dict[str, dict[str, Any]] = {}
+    try:
+        rows = ex.public_get_public_opt_summary({"instFamily": inst_family}).get("data") or []
+        for r in rows:
+            if isinstance(r, dict) and r.get("instId"):
+                out[str(r["instId"])] = r
+    except Exception:
+        pass
+    return out
+
+
+def option_delta_from_summary(
+    summary: dict[str, Any] | None = None,
+    *,
+    ticker: dict[str, Any] | None = None,
+) -> float | None:
+    """优先 Black-Scholes 单位 Delta(deltaBS),其次 delta;兼容 ticker 偶发字段."""
+    for src in (summary, ticker):
+        if not isinstance(src, dict):
+            continue
+        for key in ("deltaBS", "delta", "deltaBs", "delta_bs"):
+            v = _safe_float(src.get(key))
+            if v is not None:
+                return v
+    return None
+
+
 def build_option_chain(
     ex: ccxt.okx,
     underlying: str,
@@ -847,6 +878,7 @@ def build_option_chain(
             except Exception as e2:
                 instruments_err = str(e2) or e2.__class__.__name__
     tickers = fetch_option_tickers(ex, family)
+    summaries = fetch_option_summaries(ex, family)
     expiries: dict[str, list[dict[str, Any]]] = {}
     skipped_no_index = 0
     for meta in instruments:
@@ -872,6 +904,7 @@ def build_option_chain(
             continue
         inst_id = str(meta.get("instId") or "")
         t = tickers.get(inst_id) or {}
+        s = summaries.get(inst_id) or {}
         q = _resolve_chain_quote(
             ticker=t,
             meta=meta,
@@ -884,10 +917,7 @@ def build_option_chain(
         mark = q["mark_px"]
         ask_sz = q["ask_sz"]
         bid_sz = q["bid_sz"]
-        # 行情 ticker:delta;兼容个别字段名
-        delta = _safe_float(t.get("delta"))
-        if delta is None:
-            delta = _safe_float(t.get("deltaBS"))
+        delta = option_delta_from_summary(s, ticker=t)
         expiry_be = expiry_breakeven_from_ask(
             opt_type=opt_type,
             strike=strike,