inpharmaticist.github.io/layouts/shortcodes/nostr-contact.html

<div class="nostr-contact-wrapper not-prose">
  <style>
    .nostr-contact-wrapper {
      max-width: 600px;
      margin: 2rem 0;
      font-family: inherit;
      color: #000;
    }
    .nostr-contact-wrapper .form-group {
      margin-bottom: 1.5rem;
    }
    .nostr-contact-wrapper label {
      display: block;
      margin-bottom: 0.5rem;
      font-weight: 600;
      font-size: 0.9rem;
      color: #000;
    }
    .dark .nostr-contact-wrapper label {
      color: #fff;
    }
    .nostr-contact-wrapper input,
    .nostr-contact-wrapper textarea {
      width: 100%;
      padding: 0.75rem;
      border: 1px solid #e5e7eb;
      border-radius: 0.375rem;
      background: white;
      font-size: 1rem;
      color: #000;
    }
    .nostr-contact-wrapper input::placeholder,
    .nostr-contact-wrapper textarea::placeholder {
      color: #6b7280;
    }
    .nostr-contact-wrapper input:focus,
    .nostr-contact-wrapper textarea:focus {
      outline: 2px solid #3b82f6;
      outline-offset: -1px;
    }
    .dark .nostr-contact-wrapper input,
    .dark .nostr-contact-wrapper textarea {
      background: #1f2937;
      border-color: #4b5563;
      color: #fff;
    }
    .nostr-contact-wrapper small {
      display: block;
      margin-top: 0.25rem;
      color: #374151;
      font-size: 0.875rem;
    }
    .dark .nostr-contact-wrapper small {
      color: #9ca3af;
    }
    .nostr-contact-wrapper button {
      background: #111827;
      color: white;
      padding: 0.75rem 1.5rem;
      border-radius: 0.375rem;
      font-weight: 600;
      width: 100%;
      cursor: pointer;
      border: none;
    }
    .nostr-contact-wrapper button:hover {
      background: #374151;
    }
    .dark .nostr-contact-wrapper button {
      background: #fff;
      color: #000;
    }
    .dark .nostr-contact-wrapper button:hover {
      background: #e5e7eb;
    }
    .nostr-contact-wrapper button:disabled {
      opacity: 0.5;
      cursor: not-allowed;
    }
    #nc-status {
      margin-top: 1rem;
      padding: 1rem;
      border-radius: 0.375rem;
      display: none;
    }
    #nc-status.success {
      display: block;
      background: #f0fdf4;
      border: 1px solid #86efac;
      color: #166534;
    }
    .dark #nc-status.success {
      background: #064e3b;
      border-color: #059669;
      color: #d1fae5;
    }
    #nc-status.error {
      display: block;
      background: #fef2f2;
      border: 1px solid #fecaca;
      color: #991b1b;
    }
    .dark #nc-status.error {
      background: #7f1d1d;
      border-color: #dc2626;
      color: #fee2e2;
    }
  </style>

  <form id="nostr-contact-form" onsubmit="return false;">
    <div class="form-group">
      <label for="nc-name">Name</label>
      <input type="text" id="nc-name" required>
    </div>
    <div class="form-group">
      <label for="nc-contact">Contact Info</label>
      <input type="text" id="nc-contact" placeholder="email@example.com" required>
      <small>How you want to be contacted back</small>
    </div>
    <div class="form-group">
      <label for="nc-message">Message</label>
      <textarea id="nc-message" rows="5" required></textarea>
    </div>
    <button type="submit" id="nc-submit">Send Message</button>
  </form>
  <div id="nc-status"></div>

  <script src="https://unpkg.com/nostr-tools@1.17.0/lib/nostr.bundle.js"></script>
  <script>
    (function() {
      const RECIPIENT_NPUB = "{{ .Get "npub" | default "npub1c0r3ytrr4afgrlhrhyec6y9wvkckdllx7ul3cfevtsgjqcrhx8tsdzqs7w" }}";
      const RELAYS = {{ .Get "relays" | default `["wss://relay.damus.io","wss://nos.lol"]` | safeJS }};
      
      let RECIPIENT_HEX;
      try {
        RECIPIENT_HEX = window.NostrTools.nip19.decode(RECIPIENT_NPUB).data;
      } catch(e) {
        console.error("Invalid npub");
      }

      document.getElementById('nostr-contact-form').addEventListener('submit', async (e) => {
        e.preventDefault();
        const btn = document.getElementById('nc-submit');
        const status = document.getElementById('nc-status');
        
        if (!RECIPIENT_HEX) {
          status.innerHTML = '<strong>Config error:</strong> Invalid npub';
          status.className = 'error';
          return;
        }
        
        btn.disabled = true;
        btn.textContent = 'Sending...';
        status.className = '';
        status.style.display = 'none';
        
        try {
          const sk = window.NostrTools.generatePrivateKey();
          const pk = window.NostrTools.getPublicKey(sk);
          
          const content = await window.NostrTools.nip04.encrypt(sk, RECIPIENT_HEX, JSON.stringify({
            name: document.getElementById('nc-name').value,
            contact: document.getElementById('nc-contact').value,
            message: document.getElementById('nc-message').value,
            timestamp: new Date().toISOString()
          }));
          
          const event = {
            kind: 4,
            pubkey: pk,
            created_at: Math.floor(Date.now() / 1000),
            tags: [['p', RECIPIENT_HEX]],
            content: content
          };
          event.id = window.NostrTools.getEventHash(event);
          event.sig = window.NostrTools.signEvent(event, sk);
          
          const results = await Promise.all(RELAYS.map(url => 
            new Promise(resolve => {
              const ws = new WebSocket(url);
              const timeout = setTimeout(() => { ws.close(); resolve(false); }, 5000);
              ws.onopen = () => ws.send(JSON.stringify(['EVENT', event]));
              ws.onmessage = (msg) => {
                try {
                  const data = JSON.parse(msg.data);
                  if (data[0] === 'OK' && data[1] === event.id) {
                    clearTimeout(timeout);
                    ws.close();
                    resolve(true);
                  }
                } catch(e) {}
              };
              ws.onerror = () => { clearTimeout(timeout); ws.close(); resolve(false); };
              ws.onclose = () => { clearTimeout(timeout); resolve(false); };
            })
          ));
          
          const count = results.filter(r => r).length;
          if (count > 0) {
            status.innerHTML = '<strong>Message sent!</strong><br>Published to ' + count + ' relay(s)';
            status.className = 'success';
            document.getElementById('nostr-contact-form').reset();
          } else {
            throw new Error('No relays accepted');
          }
        } catch(err) {
          console.error(err);
          status.innerHTML = '<strong>Error:</strong> Failed to send. Try again later.';
          status.className = 'error';
        } finally {
          btn.disabled = false;
          btn.textContent = 'Send Message';
        }
      });
    })();
  </script>
</div>