This removes privkeys and addresses from function signatures.
This comes with a 11% performance improvement to the simulator,
as we no longer keep recomputing the pubkeys.
Once we move the transient store clearing to endblock, we can
further raise the size of make test_sim_gaia_fast
concretely, `make test_sim_gaia_fast` went from 16.8 seconds to 13.5 seconds on my system.
ValarDragon
Dev Ojha
Christopher Goes