> 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.md).

# Application layer

- [6. Writing contracts. Scripting.](https://black-paper.rgb.tech/application-layer/6.-writing-contracts.-scripting..md)
- [7. Interacting with contracts](https://black-paper.rgb.tech/application-layer/7.-interacting-with-contracts.md)
- [8. P2P communications](https://black-paper.rgb.tech/application-layer/8.-p2p-communications.md)
- [9. Wallet interaction](https://black-paper.rgb.tech/application-layer/9.-wallet-interaction.md)
- [10. Possible applications](https://black-paper.rgb.tech/application-layer/10.-possible-applications.md)
- [10.1. Bitcoin Finance (BiFi) on Lightning](https://black-paper.rgb.tech/application-layer/10.-possible-applications/10.1.-bitcoin-finance-bifi-on-lightning.md)
- [10.2. Non-financial applications](https://black-paper.rgb.tech/application-layer/10.-possible-applications/10.2.-non-financial-applications.md)