Generate file metadata and get file use NIP-94

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Using NIP-94, we can sign any document with our Nostr identity, effectively replacing tools like GPG and Minsign. Combined with Blossom and outbox, we can even use kind:1063 as a simple, torrent-like file transfer tool.

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Example, verify file integrity and the publisher's signature using nak:

echo '<kind:1063 event json data>' | nak verify -f example.zip