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

# Introduction

**Step 1:** 

Implement the original Bitcoin code on the chain. Bitcoin light node source code · 

**Step2:** 

Listen for the relevant cross-chain to Layer 2 address accounts, Relayer performs on-chain light node and Bitcoin full node code and Synchronization of data.