# Oracles

Liquidations rely on price feed information provided by Oracles. To ensure proper liquidations and avoid any bad debt, Solera relies on three major oracle sources:

Currently the following oracles are being used: 

1. [Stork](https://www.stork.network/)
2. [eOracle](https://eo.app/)
3. [Chronicle](https://chroniclelabs.org/)

Oracle providers for each asset and vault are listed within the application. Solera plans to onboard more providers and custom feeds as needed. 

Certain markets are configured with **custom oracles feeds** depending on the underlying asset and anticipated leverage in borrowing strategies. Oracle configuration is determined by the market/vault curator. A few common oracle configurations are listed below:

<table><thead><tr><th width="258.8125">Feed Type</th><th>Description</th></tr></thead><tbody><tr><td>Hardcoded</td><td>Value of collateral asset is set to a fixed price</td></tr><tr><td>Market Price</td><td>Value of collateral asset is calculated using an average of available trading venues on DEX and CEXs,</td></tr><tr><td>Redemption Rate / NAV</td><td>Value of collateral asset is determined by the underling Net Asset Value (NAV) of it's redeemable value, not market price</td></tr><tr><td>Time Weighted Average Price (TWAP)</td><td>Value of collateral asset is calculated using its average value over a specific period (eg. trailing 7-day average)</td></tr></tbody></table>