LN invoices expire pretty quickly though compared to e-cash, or am I forgetting something?

Thanks! With a lightning invoice, you're actually requesting sats. This is a way to give away a very small amount of sats with no fees and no specific recipient. Basically, whoever finds a cashu nut can cash it in. I think after Halloween I'm going to rename this project breadcrumbs because it's similar to leaving tons of breadcrumbs in the forest that all lead to the orange pill.