index what-answers-wanted message

This is invoked when there is zero fit, directly by the hub without needing to return to the device

Hub to all servers:

Servers process

Servers to hub:

  1. QIDs for essential As wanted now
  2. QIDs for essential As that may be wanted if Rs give more As
  3. QIDs for As that may be wanted if Rs change their wants

Hub collates these wanted As

Hub to local server: