plug alien queue space leak
?. ?=([~ %known *] sndr-state)
%+ enqueue-alien-todo sndr.packet
|= todos=pending-requests
+ :: only enqueue one packet from an alien, to plug space leak
+ ::
+ ?. =(~ rcv-packets.todos)
+ todos
todos(rcv-packets [[lane packet] rcv-packets.todos])
:: decrypt packet contents using symmetric-key.channel
::
