Are there any e-cash, nuts, or otherwise reliable solutions outside Bolt12 for a static LN invoice?

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nostr:npub1u8lnhlw5usp3t9vmpz60ejpyt649z33hu82wc2hpv6m5xdqmuxhs46turz nostr:note1rfqksm7xg233rcktvju8t9erl85tfe4mjanxttjsj933hn9rr0qqdfem2t