# 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**.