# What is a vault? The protocol uses a vault for each currency pair, each with a fixed supply asset and fixed borrow asset. The supply asset is the crypto asset users can deposit and use as collateral for a loan; the loan received will always be received in the borrow asset. --- # 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.altitude.fi/general/yield-generation-process/what-is-a-vault.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.