Error handling

{
  "error": {
    "code": "VALIDATION_ERROR",
    "message": "Invalid request body",
    "details": {
      "amount": "Must be greater than 0.01"
    }
  }
}

async function createPayment(data) {
  const response = await fetch("https://api.yuvexpay.com/v1/payments", {
    method: "POST",
    headers: {
      "Authorization": `Bearer ${token}`,
      "Content-Type": "application/json",
      "X-Idempotency-Key": generateIdempotencyKey(),
    },
    body: JSON.stringify(data),
  });

  if (!response.ok) {
    const { error } = await response.json();

    switch (response.status) {
      case 400:
        // Fix the request based on error.details
        console.error("Validation error:", error.details);
        break;
      case 401:
        // Token expired - generate a new one and retry
        await refreshToken();
        return createPayment(data);
      case 409:
        // Idempotency conflict - safe to return the original response
        console.warn("Duplicate request detected");
        break;
      case 429:
        // Rate limited - wait and retry
        const retryAfter = response.headers.get("X-RateLimit-Reset");
        await sleep(retryAfter * 1000);
        return createPayment(data);
      default:
        throw new Error(`API error: ${error.message}`);
    }
  }

  return response.json();
}