listenCheck

declare function listenCheck(fn: (event: OrderCheckContract) => void, warned?: boolean): () => void;
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Subscribes to order-check ping events with queued async processing. This is the order CHECK channel: it decides whether the order behind the monitored signal is still open on the exchange.

Emits on every live tick while a signal is monitored, BEFORE completion evaluation, discriminated by event.type: "active" — pending signal (open position), "schedule" — scheduled signal (resting entry order). Backtest never emits this event.

Throw semantics (resolved into IBrokerOrderVerdict, identical to the Broker onOrderActiveCheck / onOrderScheduleCheck channel):

• plain Error or OrderTransientError → "transient": the failed check is TOLERATED (order assumed still open, monitoring continues, event.attempt increments) up to CC_ORDER_CHECK_RETRY_ATTEMPTS CONSECUTIVE failures — a network blip no longer kills a live position; a successful check resets the streak. Exhaustion acts terminally (close "closed" / cancel "user") and signals a fatal exit (exitEmitter).
• OrderDeletedError → "deleted", TERMINAL at once, bypassing the tolerance: the CONFIRMED "order not found by event.signalId". A FILLED resting order is NOT a deleted order — confirm fills via commitActivateScheduled / commitCreateTakeProfit / commitCreateStopLoss instead.
• OrderRejectedError here is a userspace protocol violation (it belongs to the GATE channel) and intentionally degrades to "transient".

Parameters

Parameter	Description
fn	Callback function to handle check events. If the function returns a promise, signal processing will wait until it resolves.
warned