币本位开仓:张数留手续费缓冲，延长买币落账等待并修正51008文案

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

lib/exchange/okx_options_lib.py

@@ -19,7 +19,7 @@ from lib.options.options_pricing_lib import (
 )
 
 _OKX_OPTION_ERR_ZH: dict[str, str] = {
-    "51008": "可用余额或保证金不足(期权买入请确认交易账户 USDC 足够)",
+    "51008": "可用余额或保证金不足(币本位请确认交易账户 ETH/BTC 足够;USDC 模式请确认 USDC 足够)",
     "51018": "期权账户不能持有净空头头寸",
     "51019": "期权买入须使用逐仓模式(全仓模式下不能持有多头净头寸)",
 }
@@ -47,11 +47,18 @@ def _okx_trade_error_message(exc: BaseException | None = None, resp: Any = None)
         msg = str(row.get("sMsg") or "").strip()
         low = msg.lower()
         if code == "51008":
-            # 勿写死「资金账户 USDT」:期权开仓常因交易户 USDC 不足
+            # 勿写死「资金账户 USDT」:USDC 模式常因交易户 USDC 不足;币本位则是标的币不足
             if "usdc" in low:
                 return "交易账户 USDC 可用余额不足"
             if "usdt" in low:
-                return "USDT 可用余额不足(期权请先兑成 USDC 并划入交易账户)"
+                return "USDT 可用余额不足"
+            try:
+                from lib.options.options_margin_mode_lib import is_coin_margin_mode
+
+                if is_coin_margin_mode():
+                    return "可用余额或保证金不足(币本位请确认交易账户 ETH/BTC 足够,或减少张数)"
+            except Exception:
+                pass
             return _OKX_OPTION_ERR_ZH["51008"]
         zh = _OKX_OPTION_ERR_ZH.get(code)
         if zh:

lib/options/options_coin_open_lib.py

@@ -126,7 +126,13 @@ def open_coin_option_buy_full(
             message="已买币,待开期权",
         )
         # 等余额落账
-        time.sleep(0.6)
+        time.sleep(1.5)
+        try:
+            from lib.exchange.okx_options_lib import invalidate_options_balance_cache
+
+            invalidate_options_balance_cache()
+        except Exception:
+            pass
         coin_after = fetch_trading_coin_available(ex, underlying)
         if coin_after is None:
             rb = rollback_bought_coin_to_usdt(

lib/options/options_margin_mode_lib.py

@@ -143,12 +143,14 @@ def calc_sheets_from_coin_balance(
     mult = float(ct_mult or 0.01)
     need = max(1, int(min_sz or 1))
     coin = max(0.0, float(coin_available or 0))
+    # 留一点手续费/精度缓冲,避免算满张后下单 51008
+    coin_eff = coin * 0.97
     if ask <= 0 or mult <= 0:
         return {"ok": False, "msg": "卖一价无效", "sheets": 0, "coin_premium": 0.0}
     per_sheet = ask * mult
     if per_sheet <= 0:
         return {"ok": False, "msg": "无法计算单张权利金(币)", "sheets": 0, "coin_premium": 0.0}
-    sheets = int(math.floor((coin / per_sheet) + 1e-12))
+    sheets = int(math.floor((coin_eff / per_sheet) + 1e-12))
     if sheets < need:
         return {
             "ok": False,