# Voyager At it’s core, Voyager is a virtual machine. The instructions of the program it executes describe how to fetch data from chains, how to aggregate that data, and how to send messages back to the chains. A postgres-based priority queue is used to store the messages, utilizing postgres’ transactional integrity to ensure no invalid state is reached. This allows us to take the “let it fail” approach when it comes to error handling - since no state is held within the application itself, Voyager can crash and restart safely without corrupting it’s state or missing packets. --- # 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.escher.finance/key-features/voyager.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.