# 4.3 SatoshiChain Design As shown above, the Bitcoin blockchain and the SatoshiChain have a symbiotic relationship. In particular, * Users can lock their Bitcoin on the cross-chain protocol to receive $SAT on the SatoshiChain blockchain. * Users can use $SAT to deploy and interact with smart contracts, pay transaction fees, and participate in the governance of SatoshiChain. * Users can destroy $SAT and reclaim their native Bitcoin. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://satoshichain.gitbook.io/satoshi-chain/developers/4.3-satoshichain-design.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.