Initial CoinOX instance: coin-margined options + USDT hedge.

Forked from crypto_monitor OKX instance (copy-only). Keeps standalone options, perp-options and options-options hedge; drops standalone perp entrypoints; forces coin margin; adds sim wallets; default port 5010.

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

lib/exchange/gate_ccxt_lib.py

@@ -0,0 +1,9 @@
+"""Gate.io ccxt 构造(ccxt 4.x 起类名由 gateio 改为 gate)."""
+from __future__ import annotations
+
+import ccxt
+
+
+def gate_ccxt_class():
+    """返回 ccxt Gate 交易所类(兼容旧版 gateio 名称)."""
+    return getattr(ccxt, "gate", None) or ccxt.gateio