模拟盘对齐币本位：钱包支持 ETH/BTC，现货桥与期权权利金走本地撮合。

Co-authored-by: Cursor <cursoragent@cursor.com>
2026-08-20 15:16:51 +08:00
parent c8688a11ae
commit 6f721d1e6d
6 changed files with 836 additions and 516 deletions
@@ -145,3 +145,58 @@ def spot_usdc_usdt_fill(
            fee=fee,
        )
    raise ValueError("direction 须为 usdt_to_usdc 或 usdc_to_usdt")
+
+
+def spot_coin_usdt_fill(
+    *,
+    direction: str,
+    amount: float,
+    bid: float,
+    ask: float,
+    fee_rate: float,
+    coin: str = "ETH",
+) -> SpotConvertResult:
+    """
+    对齐实盘 ETH-USDT / BTC-USDT 现货市价:
+    - usdt_to_coin: 用 USDT 买币, 吃卖一 ×(1+f); amount=USDT
+    - coin_to_usdt: 卖币换 USDT, 吃买一 ×(1-f); amount=币数量
+    """
+    f = float(fee_rate)
+    amt = float(amount)
+    ccy = (coin or "ETH").strip().upper() or "ETH"
+    d = (direction or "").strip().lower()
+    if d in ("usdt_to_coin", "usdt_to_eth", "usdt_to_btc"):
+        base = float(ask)
+        fill = base * (1.0 + f)
+        if fill <= 0:
+            raise ValueError("无效卖一价")
+        to_amt = amt / fill
+        fee = amt * f
+        return SpotConvertResult(
+            direction="usdt_to_coin",
+            from_ccy="USDT",
+            to_ccy=ccy,
+            from_amount=amt,
+            to_amount=to_amt,
+            base_px=base,
+            fill_px=fill,
+            fee=fee,
+        )
+    if d in ("coin_to_usdt", "eth_to_usdt", "btc_to_usdt"):
+        base = float(bid)
+        fill = base * (1.0 - f)
+        if fill <= 0:
+            raise ValueError("无效买一价")
+        to_amt = amt * fill
+        fee = to_amt * f
+        return SpotConvertResult(
+            direction="coin_to_usdt",
+            from_ccy=ccy,
+            to_ccy="USDT",
+            from_amount=amt,
+            to_amount=to_amt,
+            base_px=base,
+            fill_px=fill,
+            fee=fee,
+        )
+    raise ValueError("direction 须为 usdt_to_coin 或 coin_to_usdt")