{"type":"rich","version":"1.0","author_name":"waxwing (npub1va…knuu7)","author_url":"https://nostr.ae/npub1vadcfln4ugt2h9ruwsuwu5vu5am4xaka7pw6m7axy79aqyhp6u5q9knuu7","provider_name":"njump","provider_url":"https://nostr.ae","html":"Bought a Mk4 about 2-3 years ago.\n\nJust opened it today. Was useful for a class I gave to some students about cryptography and what private keys are.\n"}