Oracle price feeds used in the Maple protocol to determine auction pricing for collateral liquidations in the getExpectedAmount function in the LoanManager.
Oracles for given assets are set using Globals.setPriceOracle(). For the majority of assets this will be Chainlink oracle wrappers, for USDC it will be a constant USD oracle. Oracle wrappers have the capability to provide a manual price in the event of an oracle outage, using the security multisig. In all other cases, it will simply pass through the value from getLatestPrice in the Chainlink oracle.