# Technical Implementation ### Smart Contracts Multibit utilizes smart contracts to implement the logic and rules for cross-chain token transfers. ### Multi-Signature Mechanism To ensure the security of cross-chain transfers, Multibit employs a multi-signature mechanism. When a user initiates a token transfer request, multiple authorized signatures are required to execute the cross-chain operation, mitigating potential malicious behavior and risks. ### Listening Nodes Multibit relies on listening nodes to monitor transaction statuses on the ETH chain, BNB chain, and BTC network. These nodes are responsible for monitoring token locking and release events, ensuring real-time and accurate cross-chain transfers. ### Security Audits To ensure the security of cross-chain transfers, Multibit conducts regular security audits. By reviewing smart contracts, system architecture, and relevant code, the system is checked for potential vulnerabilities and security risks. --- # 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://docs.multibit.exchange/multibit/protocol/technical-implementation.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.