Rate limits & retries

HTTP/1.1 429 Too Many Requests

{ "message": "Too Many Requests" }

async function withBackoff(fn, maxRetries = 5) {
  for (let attempt = 0; ; attempt++) {
    const res = await fn();
    if (res.status !== 429 && res.status < 500) return res;
    if (attempt >= maxRetries) return res;
    const delay = Math.min(30000, 1000 * 2 ** attempt) + Math.random() * 500;
    await new Promise((r) => setTimeout(r, delay));
  }
}