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

# Blockchain Libraries

This library introduces tested code to easily configure the Sign and Submit process, along with Confirm block propagation functions that can be imported into your app to make it executable on NxtFi.

{% content-ref url="/pages/Q8mnl48uFLWR6fyIn7lp" %}
[Javascript - CreateBlock](/blockchain-libraries/javascript-createblock.md)
{% endcontent-ref %}