Satellite server sends response back to main server
        - Response provides results from each chunk that was completed before funds ran out, and includes a "receipt" for the overall funds transfer:
          - Total amount (in escrow) at start.
 
          - ID of other account (owner of the satellite service, or master account in case of satellites I create myself) to be credited, and amount of that credit, i.e. exact amount charged for that task.
 
          - Amount not used, hence to be refunded to user, like "change" at cash register.
 
          
 
        - Response is public-key signed by satellite server and encrypted for main server.
 
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