Function stamp 

fn stamp(command: Command, me: u64) -> Command

This connection’s own stamp on the commands that carry one.

The take a start begins and the stop that ends it are this connection’s alone, and the stamp riding back on the take’s updates is what routes them home. A hand-off’s answer carries the same stamp, so an ending names the connection that sent it rather than only the seat it was addressed to. A client cannot claim another’s: a stamp the client put on the frame is overwritten here, because the field never crosses the wire.