ditto/scripts/db-populate-nip05.ts

import { NSchema as n } from '@nostrify/nostrify';

import { Storages } from '@/storages.ts';
import { faviconCache } from '@/utils/favicon.ts';
import { nip05Cache } from '@/utils/nip05.ts';

const kysely = await Storages.kysely();

const query = kysely
  .selectFrom('nostr_events')
  .select('content')
  .where('kind', '=', 0);

for await (const { content } of query.stream(100)) {
  const signal = AbortSignal.timeout(30_000); // generous timeout

  // Parse metadata.
  const metadata = n.json().pipe(n.metadata()).catch({}).safeParse(content);
  if (!metadata.success) continue;

  // Update nip05.
  const { nip05 } = metadata.data;
  if (nip05) {
    try {
      await nip05Cache.fetch(nip05, { signal });
    } catch {
      // Ignore.
    }
  }

  // Update favicon.
  const domain = nip05?.split('@')[1].toLowerCase();
  if (domain) {
    try {
      await faviconCache.fetch(domain, { signal });
    } catch {
      // Ignore.
    }
  }
}

Deno.exit();