Rate limits

HTTP/1.1 429 Too Many Requests
Retry-After: 42
Content-Type: application/json

{
  "error": "RATE_LIMIT_EXCEEDED",
  "message": "Demasiadas requests — esperar 42 segundos",
  "retryAfter": 42
}

{
  "error": "RATE_LIMITED",
  "message": "Demasiadas cotizaciones. Intenta de nuevo en un minuto."
}

async function mouvFetch(url, options) {
  const res = await fetch(url, options);
  if (res.status === 429) {
    const wait = parseInt(res.headers.get('Retry-After') || '1') * 1000;
    console.warn(`Rate limited, waiting ${wait}ms`);
    await new Promise(r => setTimeout(r, wait));
    return mouvFetch(url, options); // retry una vez
  }
  return res;
}