What about making static invoices for cashu mints where people can redeem the same QR code for a set of payments connected to an inventory of products. So a cashu token pays out a small amount of satoshis for each product sold but uses the same pay string address? Is this possible? A non custodial static invoice for AMP on lightning still does not exist. This seems like it could be a feature for Phoenix server launching soon, But what about cashu?
Discussion
I think what I am imagining would be a feature of locktime. A set amount of payments would be associated with the cost of a good, So the mint can pay to pubkeys associated with customer wallets. I think this demands additional features in the e cash codebase. A P2PK with a fixed value associated with an inventory, Where the cashu nut does not expire until the transactions are all fulfilled and the
token can expire.
I am imagining being at a Bitcoin event with products to sell, And having an invoice that accepts payment for items. Each product could be a single token, And when this scales out, A business with tokens that have year or multiple year lifespans.