> For the complete Linea documentation index, see [llms.txt](/llms.txt). > Agents can fetch this page as Markdown at [https://docs.linea.build/reference/smart-contracts/interfaces/l2/il2messageservicev1.md](https://docs.linea.build/reference/smart-contracts/interfaces/l2/il2messageservicev1.md). # IL2MessageServiceV1 # `IL2MessageServiceV1` ### setMinimumFee ```solidity function setMinimumFee(uint256 _feeInWei) external ``` The Fee Manager sets a minimum fee to address DOS protection. _MINIMUM_FEE_SETTER_ROLE is required to set the minimum fee._ #### Parameters | Name | Type | Description | | --- | --- | --- | | _feeInWei | uint256 | New minimum fee in Wei. |