Where did you learn about Lightning and nostr:npub1hcwcj72tlyk7thtyc8nq763vwrq5p2avnyeyrrlwxrzuvdl7j3usj4h9rq, nostr:npub1ngyslp4dl8aacd779g28ghnn6msl6ztd8ksxwzm8jh894570a63snfc2ed?