Limites de requisição

HTTP/1.1 429 Too Many Requests
RateLimit-Limit: 120
RateLimit-Remaining: 0
RateLimit-Reset: 42

{ "error": "Rate limit exceeded. Max 120 requests/minute." }

async function comRetry(fn, maxTentativas = 5) {
  for (let i = 0; i <= maxTentativas; i++) {
    const res = await fn();
    if (res.status !== 429) return res;

    const reset = Number(res.headers.get("RateLimit-Reset")) || 2 ** i;
    const jitter = Math.random() * 1000;
    await new Promise((r) => setTimeout(r, reset * 1000 + jitter));
  }
  throw new Error("rate limit: máximo de tentativas excedido");
}