Error Handling

1{
2  "error": "VALIDATION_FAILED",
3  "message": "Die Rechnung entspricht nicht dem XRechnung 3.0.2 Schema"
4}

1async function createInvoice(data, retries = 3) {
2  for (let i = 0; i < retries; i++) {
3    try {
4      const response = await fetch('https://service.invoice-api.xhub.io/api/v1/invoice/DE/XRECHNUNG/generate', {
5        method: 'POST',
6        headers: {
7          'Authorization': 'Bearer sk_live_...',
8          'Content-Type': 'application/json'
9        },
10        body: JSON.stringify(data)
11      });
12 
13      if (response.status === 429) {
14        // Rate limited - wait and retry
15        const retryAfter = response.headers.get('Retry-After') || 60;
16        await new Promise(r => setTimeout(r, retryAfter * 1000));
17        continue;
18      }
19 
20      if (response.status >= 500) {
21        // Server error - retry with exponential backoff
22        await new Promise(r => setTimeout(r, Math.pow(2, i) * 1000));
23        continue;
24      }
25 
26      const result = await response.json();
27 
28      if (!response.ok) {
29        // Client error - don't retry, handle the error
30        throw new Error(result.message);
31      }
32 
33      return result;
34    } catch (error) {
35      if (i === retries - 1) throw error;
36    }
37  }
38}