> For the complete documentation index, see [llms.txt](https://dev.fatpay.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://dev.fatpay.org/zh/appendix.md).

# 附录

- [语言种类](https://dev.fatpay.org/zh/appendix/languages.md)
- [可支持法币](https://dev.fatpay.org/zh/appendix/supported-fiat-list.md)
- [可支持加密货币（on-ramp）](https://dev.fatpay.org/zh/appendix/supported-cryptocurrencies-list.md)
- [可支持的加密货币（NFT Checkout）](https://dev.fatpay.org/zh/appendix/supported-cryptocurrencies-list-1.md)
- [API 接口错误码索引](https://dev.fatpay.org/zh/appendix/api-error-codes.md)
- [RSA 密钥生成指南](https://dev.fatpay.org/zh/appendix/rsa-keys-generation-guide.md): 本文对 RSA 密钥的生成做了讲解
- [Demo](https://dev.fatpay.org/zh/appendix/demo.md)
- [集成 FaTPay 页面加签](https://dev.fatpay.org/zh/appendix/demo/widget-signature-demo.md)
- [API 接口加签](https://dev.fatpay.org/zh/appendix/demo/api-signature-demo.md)
- [Webhook 订单回调验签](https://dev.fatpay.org/zh/appendix/demo/webbook-validation.md)


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