Implementation Contract Auditing
Implementation contract auditing is the rigorous, independent review of the code that defines the actual business logic of an upgradable smart contract system. Because the implementation contract is the engine of the protocol, any flaw within it can be exploited, even if the proxy layer is secure.
Auditors focus on identifying logic errors, edge cases in mathematical formulas for derivatives, and potential vulnerabilities that could be triggered by external inputs. In the context of financial derivatives, this includes checking the accuracy of pricing models, collateralization requirements, and the integrity of liquidation processes.
This audit is a mandatory step before any new implementation is deployed to a live, value-bearing protocol, ensuring that the system remains secure after an upgrade.