nostr:npub12rv5lskctqxxs2c8rf2zlzc7xx3qpvzs3w4etgemauy9thegr43sf485vg could cashu be used for this actually? 
https://blog.nymtech.net/the-nym-token-flow-powering-the-worlds-most-private-network-48c15db379c5#3535