Errors and rate limits

{
  "error": {
    "code": "INVALID_API_KEY",
    "message": "Missing API key.",
    "request_id": "req_..."
  }
}

const retryable = new Set([429, 502, 503, 504]);

for (let attempt = 0; attempt < 4; attempt++) {
  const response = await fetch(url, {
    headers: { Authorization: "Bearer YOUR_API_KEY" },
  });
  const body = await response.json();

  if (response.ok) return body;

  if (!retryable.has(response.status)) {
    const { code, request_id } = body.error;
    throw new Error(`${response.status} ${code} (${request_id})`);
  }

  const retryAfter = Number(response.headers.get("Retry-After"));
  const waitMs =
    response.status === 429 && Number.isFinite(retryAfter)
      ? retryAfter * 1000
      : 500 * 2 ** attempt + Math.random() * 250;

  await new Promise((resolve) => setTimeout(resolve, waitMs));
}

throw new Error("DeFi Orbit API kept failing");