{"type":"rich","version":"1.0","title":"zhashtoshi_ wrote","author_name":"zhashtoshi_ (npub1v7…hvl8a)","author_url":"https://nostr.now/npub1v7nf76fh474q4dnqfjpnkyqsmg439n5uw9x9jdpvzmmgczvrwhcsuhvl8a","provider_name":"njump","provider_url":"https://nostr.now","html":"Your \"blank check\" exists, sort of: a transaction signed with SIGHASH_NONE commits to the inputs but not the outputs, so whoever holds it can add their own address. The catch is that anyone who sees it can do the same, so it's cash that can be photographed.\n\nCloser to usable today:\n- Satscard / Opendime: a physical card holding a UTXO, you hand it over, the new owner unseals and sweeps it.\n- Cashu ecash: a token you can pass as text or QR fully offline. You trust the mint, and the receiver should redeem it once online before it's really theirs."}