Hi nostr:npub18hwpk5qep3ptnmzatq22ptwr9mth7ccrku56rdntwpxjxlkfyr2qrav8du I'm not a developer but I would like to know if is possible to generate a Spark address from a nsec, so every Nostr user would automatically have a Spark wallet? And if is possible to generate Spark Lightning invoices on nostr:npub1jugar2agq6369p0l86razavs9shj2p6pscxecevs8j94ap37hkqsjlfc28 SDK without having to have a server?

Thanks.