Returns, if exists, a list containing all commitments originating from the given participant that overlap the given period. Does not delete them from the queue.

When the period covers a single reconciliation interval, there should be only one such commitment if the counter participant is correct; otherwise, the counter participant is malicious. The method is unaware of reconciliation intervals, however, thus cannot distinguish malicious behavior, and leaves this up to the caller. The caller (who has access to the reconciliation interval duration) should signal malicious behavior by emitting an AcsCommitmentAlarm if the list contains more than one element. Even with possible malicious behavior, the list of commitments might still be useful to the caller, for example if the list contains the expected commitment among all unexpected ones.

However, the period passed to the method can cover several reconciliation intervals (e.g., when the caller participant hasn't heard from the sequencer in a while, and thus did not observe intermediate ticks). But the counter participant might have sent commitments for several reconciliation intervals in the period. Thus, in this case, the method returns a list and there is no malicious behavior.

Returns an unordered list of commitments whose period ends at or before the given timestamp.

Does not delete them from the queue.

Returns an unordered list of commitments whose period ends at or after the given timestamp.

Does not delete them from the queue.