maintMargin -> initialMargin

vnpy_binance/binance_linear_gateway.py

@@ -501,7 +501,8 @@ def on_query_account(self, data: dict, request: Request) -> None:
             account: AccountData = AccountData(
                 accountid=asset["asset"],
                 balance=float(asset["walletBalance"]),
-                frozen=float(asset["maintMargin"]),
+                # https://binance-docs.github.io/apidocs/futures/cn/#v3-user_data-2
+                frozen=float(asset["initialMargin"]),
                 gateway_name=self.gateway_name
             )
 
@@ -517,6 +518,7 @@ def on_query_position(self, data: list, request: Request) -> None:
                 exchange=Exchange.BINANCE,
                 direction=Direction.NET,
                 volume=float(d["positionAmt"]),
+                frozen=float(d["initialMargin"]), # https://binance-docs.github.io/apidocs/futures/cn/#v3-user_data-3
                 price=float(d["entryPrice"]),
                 pnl=float(d["unRealizedProfit"]),
                 gateway_name=self.gateway_name,
@@ -769,7 +771,6 @@ def on_packet(self, packet: dict) -> None:
     def on_listen_key_expired(self) -> None:
         """Callback of listen key expired"""
         self.gateway.write_log("Listen key is expired")
-        self.disconnect()
 
     def on_account(self, packet: dict) -> None:
         """Callback of account balance and holding position update"""