yo nostr:npub1cn4t4cd78nm900qc2hhqte5aa8c9njm6qkfzw95tszufwcwtcnsq7g3vle how about adding a "Max" send to nostr:npub1ex7mdykw786qxvmtuls208uyxmn0hse95rfwsarvfde5yg6wy7jq6qvyt9 so I don't have to calculate sat fees? I did a test purchase on Cash App the other day and while there's no "Max" button, if you don't have enough sats for the fee, it will recalculate the send amount for you to approve. Seems like a useful feature. Thanks!