The embed submission forms accepted any free-text identifier and published it,
so they were an easy spam vector. Add a shared, testable NIP-19 validator and
require a well-formed npub before a submission is sent.
- js/utils/validateNpub.js: validateNpubHex() decodes via nostr-tools nip19 and
returns the 64-char hex pubkey, or null for anything that isn't a real npub
(free text, wrong prefix, bad checksum, wrong NIP-19 entity). Also exposed as
window.validateNpubHex for the classic iframe form scripts.
- Application form (required npub): submit is blocked unless valid; the decoded
hex is written into the application body for canonical storage/matching.
- Feature-request / bug-fix / feedback (optional npub): stays optional, but a
non-empty value must be a valid npub or submit is blocked with an inline error.
- Tests: tests/validate-npub.test.mjs (real nostr-tools, no implementation mirror).
Co-Authored-By: Claude Opus 4.8 <[email protected]>
