> For the complete documentation index, see [llms.txt](https://black-paper.rgb.tech/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://black-paper.rgb.tech/application-layer/10.-possible-applications/10.1.-bitcoin-finance-bifi-on-lightning.md).

# 10.1. Bitcoin Finance (BiFi) on Lightning