Error handling: HTTP status codes and retries

{
  "x402Version": 1,
  "accepts": [
    {
      "scheme": "exact",
      "network": "eip155:8453",
      "maxAmountRequired": "5000000",
      "resource": "https://laso.finance/get-card?amount=5",
      "description": "Get Laso Finance prepaid card",
      "payTo": "0x3291e96b3bff7ed56e3ca8364273c5b4654b2b37"
    }
  ]
}

{
  "success": false,
  "errorReason": "insufficient_funds",
  "errorMessage": "the transfer could not be settled on-chain",
  "payer": "9sZEFeQDPyjjFjZM9jK6i6L5eWMCrTHB7pCWjU1k9WXR",
  "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
  "x_laso_guidance": "…the concrete next step…"
}

{
  "error": "Amount must be at least $5. Received: $2"
}

{
  "error": "Invalid or expired token"
}

{
  "error": "Not authorized to view this card"
}

{
  "error": "Card not found"
}

{
  "error": "Daily card refresh limit reached. You can request at most 24 refreshes for a card in a 24-hour period. Please try again later."
}

{
  "error": "Failed to order card. Please contact support."
}

async function safeApiCall(fn) {
  try {
    return await fn();
  } catch (error) {
    const status = error.response?.status;
    const message = error.response?.data?.error;

    switch (status) {
      case 400:
        console.error("Bad request:", message);
        throw new Error(`Invalid request: ${message}`);
      case 401:
        console.log("Token expired, refreshing...");
        await refreshTokens();
        return await fn(); // Retry with new token
      case 403:
        console.error("Not authorized:", message);
        throw new Error(`Access denied: ${message}`);
      case 404:
        console.error("Not found:", message);
        throw new Error(`Resource not found: ${message}`);
      default:
        console.error(`Unexpected error (${status}):`, message);
        throw error;
    }
  }
}