FAQs and Troubleshooting

Common Issues and Solutions

❌ Issue: "Invalid signature" error on webhook receipt

• Solution: Ensure the payload is stringified correctly and matches the secret used for hashing.

❌ Issue: Down payment fails

• Solution: Verify the test card details and ensure the card is not expired.

❌ Issue: API returns 429 (Too Many Requests)

• Solution: Implement exponential backoff and respect rate limits (100 requests/minute).