Totally random thoughts and stream of consciousness.
This stuff might be inaccurate, out of date, wrong and/or crazy.
The Message:
Must be a hash reference.
Only the .transit key is reserved.
By default, it is not returned.
Maybe some stuff it has:
.transit => {
checksum => $sum,
checksum_type => $what kind of crypto,
send_ts => $epoch_time,
receive_ts => $epoch_time,
},