Cabinet four
You run a small shop. The day is done and one lamp is still on over the counter.
A customer paid a deposit for a custom order. The message on the payment carries the order reference INV-204. Your supplier will not release the materials until someone can see that the money really arrived.
You hold a viewing key for the shop account. It lets a person read what the account received. It cannot spend a single coin. Tonight you decide how much of it to show.
The supplier’s window is dark. Nothing to see.
CUSTOM ORDER
Paid into your shop account, sealed.
Reading the shop account from the chain. One moment.