> For the complete documentation index, see [llms.txt](https://docs.asterizm.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.asterizm.io/infrastructure/asterizm-interfaces/iconfig.md).

# IConfig

The `IConfig` interface extends [IAsterizmConfigEnv](/infrastructure/asterizm-interfaces/iasterizmconfigenv.md) 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)`