/dev/drivers
caller pkgpath of the realm that crossed into this read
domain the chain domain
drivers this table
height current block height
null always empty; the bit bucket
random sha256 of chain id and height, hex; block-deterministic, NOT unpredictable
session the calling key's session scope, one AllowPath per line
sysname the chain id
time block time, RFC3339
user the origin caller's address
zero endless NUL bytes; reads exactly what you ask for
