# IConfig

The `IConfig` interface extends [IAsterizmConfigEnv](https://docs.asterizm.io/infrastructure/asterizm-interfaces/iasterizmconfigenv) and provides functionality for managing relay fees.

{% embed url="<https://github.com/Asterizm-Protocol/asterizm-contracts-evm/blob/master/contracts/interfaces/IConfig.sol>" %}

### Functions

#### updateTrustedRelayFee

Updates the fee for trusted relays.

**Parameters:** `_fee (uint)`