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OrderPendingCancel

docs/concepts/events/order_pending_cancel.md

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OrderPendingCancel

OrderPendingCancel represents a CancelOrder command having been sent to the trading venue. The ExecutionEngine applies it to the order, updates the Cache, and publishes it on the MessageBus. It fires when the system dispatches a cancel request and awaits venue acknowledgement.

Transition: ACCEPTED -> PENDING_CANCEL. Handler: on_order_pending_cancel.

Fields

OrderPendingCancel carries only the common order event fields. On this event, venue_order_id and account_id are usually populated but may be None, and reconciliation carries a real value.

Example

Reading the event in a strategy handler:

python
def on_order_pending_cancel(self, event: OrderPendingCancel) -> None:
    self.log.info(f"Cancel pending for {event.client_order_id}")
  • Events - Event categories, dispatch, and the common order event fields.
  • Orders - Order types and the state machine.