# Security and Audits

Optimism Yield Index is built on top of [dHedge SDK](https://docs.dhedge.org/dhedge-protocol), which has been audited twice by [Certik](https://www.certik.com/projects/dhedge) (2021) and [iosiro](https://iosiro.com/audits/dhedge-differential-smart-contract-audit) (2020), and has a bug bounty program with [ImmuneFi](https://immunefi.com/bounty/dhedge).