策略引擎里面 cancel_order的问题 请教下大佬们，
cancel_order方法里面有：
self.cancel_local_stop_order(strategy, vt_orderid)
self.cancel_server_order(strategy, vt_orderid)
两个方法 分别是什么区别呢？ 到底这个 stop_order 是个什么感概？
def cancel_order(self, strategy: CtaTemplate, vt_orderid: str):
"""
"""
if vt_orderid.startswith(STOPORDER_PREFIX):
self.cancel_local_stop_order(strategy, vt_orderid)
else:
self.cancel_server_order(strategy, vt_orderid)
def cancel_local_stop_order(self, strategy: CtaTemplate, stop_orderid: str):
"""
Cancel a local stop order.
"""
stop_order = self.stop_orders.get(stop_orderid, None)
if not stop_order:
return
strategy = self.strategies[stop_order.strategy_name]
# Remove from relation map.
self.stop_orders.pop(stop_orderid)
vt_orderids = self.strategy_orderid_map[strategy.strategy_name]
if stop_orderid in vt_orderids:
vt_orderids.remove(stop_orderid)
# Change stop order status to cancelled and update to strategy.
stop_order.status = StopOrderStatus.CANCELLED
self.call_strategy_func(strategy, strategy.on_stop_order, stop_order)
self.put_stop_order_event(stop_order) def cancel_server_order(self, strategy: CtaTemplate, vt_orderid: str):
"""
Cancel existing order by vt_orderid.
"""
order = self.main_engine.get_order(vt_orderid)
if not order:
self.write_log(f"撤单失败，找不到委托{vt_orderid}", strategy)
return
req = order.create_cancel_request()
self.main_engine.cancel_order(req, order.gateway_name)
