> For the complete documentation index, see [llms.txt](https://sp8de-docs.gitbook.io/s-p-8-d-e-or-white-paper/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://sp8de-docs.gitbook.io/s-p-8-d-e-or-white-paper/smart-contract-user-funct..md).

# Smart-contract User funct.

User can buy and decrypt QRNG

<figure><img src="/files/nRFRcFQGcbCxnIBWzSBh" alt=""><figcaption></figcaption></figure>