[Zope-DB] Getting transaction ID of get_transaction().commit()?

[Andreas Jung]

Is there a way to retrieve the transaction ID  from a transaction that is 
commited
using get_transaction().commit(). My usecase for this is the following:
an application provides an undo functionality and shows a list of actions
performed by the user. the user must be able to undo the last action. so in 
this
scenario the transcations should be presented like a stack. new 
actions/transaction will
be put on the stack and undone action are removed from the stack.

However inside the ZODB an undone transaction is also a new transaction and 
so it is
hard to keep track of transactions necessary to be presented to the user, 
undone
transactions and other transactions.

Any ideas how to handle this?

Andreas