# Welcome to OpenBit OpenBit is a zk-rollup specifically designed for BTC assets, supporting native BTC assets. By leveraging a combination of various software and hardware protection technologies, such as TEE (Trusted Execution Environment) and ZKP (Zero-Knowledge Proof), it provides a gas-free exchange and lending experience for BTC assets while maintaining the core value of self-custody. Be sure to check out our official links at . --- # 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://openbitbtc.gitbook.io/docs/welcome-to-openbit.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.