Clojurians Log v2

Is the following guaranteed to give me the most recent N transaction datoms? Is there a better way to do this?

(->>
   (d/datoms @conn :eavt)
   reverse
   (take N))

Oops, I'm thinking that the following is probably a better approach as it will only return :db/txInstant datoms:

(->>
   (d/datoms @conn :aevt :db/txInstant)
   reverse
   (take N))