fix(gate): restore non-blocking hub account under RS contention

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

crypto_monitor_gate/app.py

@@ -467,6 +467,8 @@ from lib.exchange.gate_ccxt_lib import gate_ccxt_class
 # Gate.io USDT 永续(swap)
 exchange = gate_ccxt_class()({
     "enableRateLimit": True,
+    # 避免关键位监控/账户拉取无限挂起拖垮中控
+    "timeout": int(os.getenv("GATE_CCXT_TIMEOUT_MS", "8000")),
     "options": {
         "defaultType": "swap",
         "defaultMarginMode": _GATE_DEFAULT_MARGIN_MODE,
@@ -2832,13 +2834,13 @@ def friendly_exchange_error(err, available_usdt=None):
     return f"交易所下单失败:{clean}"
 
 
-def get_exchange_capitals(force=False):
-    ok_live, _ = ensure_exchange_live_ready()
-    if not ok_live:
-        return None, None
+_BALANCE_REFRESH_LOCK = threading.Lock()
+_BALANCE_REFRESH_INFLIGHT = False
+
+
+def _fetch_exchange_capitals_sync():
+    """同步拉取资金/交易账户余额并写入缓存(会占用 ccxt,勿在中控热路径直接调用)."""
     now_ts = time.time()
-    if (not force) and ACCOUNT_BALANCE_CACHE["updated_at"] and now_ts - ACCOUNT_BALANCE_CACHE["updated_at"] < BALANCE_REFRESH_SECONDS:
-        return ACCOUNT_BALANCE_CACHE["funding_usdt"], ACCOUNT_BALANCE_CACHE["trading_usdt"]
     try:
         ACCOUNT_BALANCE_CACHE["funding_usdt"] = _fetch_gate_funding_usdt()
     except Exception:
@@ -2852,6 +2854,43 @@ def get_exchange_capitals(force=False):
     return ACCOUNT_BALANCE_CACHE["funding_usdt"], ACCOUNT_BALANCE_CACHE["trading_usdt"]
 
 
+def _kick_exchange_capitals_refresh():
+    """后台刷新余额;与 key_rs 争用时不阻塞看板/中控请求."""
+    global _BALANCE_REFRESH_INFLIGHT
+    with _BALANCE_REFRESH_LOCK:
+        if _BALANCE_REFRESH_INFLIGHT:
+            return
+        _BALANCE_REFRESH_INFLIGHT = True
+
+    def _worker():
+        global _BALANCE_REFRESH_INFLIGHT
+        try:
+            _fetch_exchange_capitals_sync()
+        except Exception:
+            pass
+        finally:
+            with _BALANCE_REFRESH_LOCK:
+                _BALANCE_REFRESH_INFLIGHT = False
+
+    threading.Thread(target=_worker, name="gate-balance-refresh", daemon=True).start()
+
+
+def get_exchange_capitals(force=False):
+    ok_live, _ = ensure_exchange_live_ready()
+    if not ok_live:
+        return None, None
+    now_ts = time.time()
+    has_cache = bool(ACCOUNT_BALANCE_CACHE["updated_at"])
+    fresh = has_cache and (now_ts - ACCOUNT_BALANCE_CACHE["updated_at"] < BALANCE_REFRESH_SECONDS)
+    if (not force) and fresh:
+        return ACCOUNT_BALANCE_CACHE["funding_usdt"], ACCOUNT_BALANCE_CACHE["trading_usdt"]
+    if not force:
+        # 过期/冷缓存:先返回现有值(可空),后台刷新,避免 /api/hub/account 被 RS 监控拖死
+        _kick_exchange_capitals_refresh()
+        return ACCOUNT_BALANCE_CACHE["funding_usdt"], ACCOUNT_BALANCE_CACHE["trading_usdt"]
+    return _fetch_exchange_capitals_sync()
+
+
 def execute_transfer_usdt(amount, from_account, to_account):
     from lib.exchange.gate_transfer_lib import execute_transfer_usdt as _gate_execute_transfer_usdt
 
@@ -4611,14 +4650,25 @@ def _finalize_key_monitor_one_shot(conn, row, last_msg, close_reason):
     conn.execute("DELETE FROM key_monitors WHERE id=?", (row["id"],))
 
 
+_RS_BAR_CACHE: dict[str, dict] = {}
+_RS_BAR_CACHE_TTL_SEC = float(os.getenv("GATE_RS_BAR_CACHE_SEC", "45"))
+
+
 def _fetch_last_closed_bar(symbol):
-    """最近一根闭合 K:[ts, o, h, l, c, v] 或 None."""
+    """最近一根闭合 K:[ts, o, h, l, c, v] 或 None.短缓存减轻关键位监控打爆 ccxt."""
     ex_sym = normalize_exchange_symbol(symbol)
+    now = time.time()
+    cached = _RS_BAR_CACHE.get(ex_sym)
+    if cached and now - float(cached.get("updated_at") or 0) < _RS_BAR_CACHE_TTL_SEC:
+        return cached.get("bar")
     bars = exchange.fetch_ohlcv(ex_sym, timeframe=KLINE_TIMEFRAME, limit=5) or []
     if len(bars) < 2:
+        _RS_BAR_CACHE[ex_sym] = {"updated_at": now, "bar": None}
         return None
     closed = bars[:-1]
-    return closed[-1] if closed else None
+    bar = closed[-1] if closed else None
+    _RS_BAR_CACHE[ex_sym] = {"updated_at": now, "bar": bar}
+    return bar
 
 
 def _key_rs_gate_preview(symbol, upper, lower):
@@ -9893,14 +9943,14 @@ def _hub_meta_bundle():
 
 
 def _hub_account_bundle():
-    funding_capital, trading_capital = get_exchange_capitals(force=True)
+    # 中控看板高频拉取:仅走余额缓存;不再额外 fetch_balance(会与关键位监控争用 ccxt)
+    funding_capital, trading_capital = get_exchange_capitals(force=False)
     funding_usdt = round(funding_capital, 2) if funding_capital is not None else None
     trading_usdt = round(trading_capital, 2) if trading_capital is not None else None
-    available = get_available_trading_usdt()
     return {
         "funding_usdt": funding_usdt,
         "trading_usdt": trading_usdt,
-        "available_trading_usdt": round(available, 2) if available is not None else None,
+        "available_trading_usdt": trading_usdt,
         "trading_day": get_trading_day(app_now()),
     }