Question on transaction rollback

[MarkLee425]

Is it possible to do a hard rollback for transactions?
I have a scenario that client side called an API request to server side and server side saves some records using transaction. If client side aborts the request, it should hard rollback the transactions done in server side even if the transactions is successfully finished.

[porsager]

Any error thrown inside the begin() callback will cause rollback

[MarkLee425]

Thanks for your reply. I understand that, but is there any way to manually rollback when there is no error, like rollback by transaction id?