# Core `pylon-protocol/core` contracts define Pylon interest redirection logic, of which: * any UST deposited to the `Pool` contract is deposited to Anchor, and returned aUST from resulting contracts is held by this contract. * the `Pool` contract returns **DP tokens** (Deposit Provider tokens) instead, which are pegged 1:1 to UST. * the `Pool` contract queries new `exchange_rate` parameters from Anchor, and uses this information to calculate how much UST should be returned for DP token redemptions and interest redirection, respectively. * `exchange_rate` follows a `virtual exchange rate` parameter calculated by the `Exchange Rate` contract, which charges a 10% fee for all generated interest. * collected fees are sent to the `pylon-protocol/token/collector` contract to be used for **MINE buybacks** for **MINE governance stakers**. --- # 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.pylon.money/contract-specification/core.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.