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 store = await Storages.db();

for await (const msg of store.req([{ kinds: [0] }])) {
  if (msg[0] === 'EVENT') {
    const signal = AbortSignal.timeout(30_000); // generous timeout
    const event = msg[2];

    // Parse metadata.
    const metadata = n.json().pipe(n.metadata()).catch({}).safeParse(event.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();