Cancels a deferred transaction.
Parameters
sender_id- The id of the sender
Precondition
The deferred transaction ID exists.
Precondition
The deferred transaction ID has not yet been published.
Post Condition
Deferred transaction canceled.
Returns
1 if transaction was canceled, 0 if transaction was not found
Example:
id = 0xffffffffffffffff
cancel_deferred( id );