---
page_title: Appendix
product: UPI TPAP SDK
platform: Flutter
page_source: https://juspay.io/in/docs/upi-tpap-sdk/flutter/resources/appendix
llms_txt: https://juspay.io/in/docs/llms.txt
product_llms_txt: https://juspay.io/in/docs/upi-tpap-sdk/llms.txt
---


## Appendix



[Transaction Error codes](https://developer.juspay.in/v2.0/docs/transaction-status-codes)

[Hyper SDK FAQ](https://developer.juspay.in/v2.0/docs/faqs)

[Signature generation](../resources/generating-the-signature)

---

## See Also

- [FAQs](https://juspay.io/in/docs/upi-tpap-sdk/flutter/resources/faqs)
- [Integration Architecture](https://juspay.io/in/docs/upi-tpap-sdk/react-native/overview/integration-architecture)