# Comptroller The Comptroller is the risk management layer of the Strike protocol; it determines how much collateral a user is required to maintain, and whether (and by how much) a user can be liquidated. Each time a user interacts with a sToken, the Comptroller is asked to approve or deny the transaction. The Comptroller maps user balances to prices (via the Price Oracle) to risk weights (called [Collateral Factors](/comptroller/collateral-factor.md)) to make its determinations. Users explicitly list which assets they would like included in their risk scoring, by calling [Enter Markets](/comptroller/enter-markets.md) and [Exit Market](/comptroller/exit-market.md). ## Architecture The Comptroller is implemented as an upgradeable proxy. The Unitroller proxies all logic to the Comptroller implementation, but storage values are set on the Unitroller. To call Comptroller functions, use the Comptroller ABI on the Unitroller address. --- # 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.strike.org/comptroller.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.