Scope note
Target Use — Crypto to Fiat
The target
A maker wants USD, EUR, GBP, or PLN in a compatible bank account and offers an exact quantity of an audited crypto asset. The maker commits one currency and an integer minor-unit amount, permitted rails and bank adapters, destination, claim lifetime, and minimum bond. No protocol oracle decides whether the pair is a good price.
The path
A taker reserves the offer with a mandatory bond. After the wallet proves the direct MPC-TLS path is ready, the taker sends the exact committed fiat amount using the derived memo. Three independent notary sessions bind the payer-side booked debit record; at least two must describe the same payment fact.
The evidence stays inside a zero-knowledge action that settles with the vault epoch. The taker receives crypto and the bond back; the maker already holds the fiat. If the claim expires, the offer reopens and the maker receives the bond.
What the example does not imply
It does not imply current bank support, a measured settlement time, a live fee, a guaranteed market price, or legal approval. Every concrete adapter and the deployment itself must pass the gates in Trust & risks.