eoa-contracts/contracts/smart-account/test/upgrades/v1/IModuleV1.sol

// SPDX-License-Identifier: MIT
pragma solidity 0.8.17;
import {UserOperation} from "@account-abstraction/contracts/interfaces/UserOperation.sol";

// interface for modules to verify singatures signed over userOpHash
interface IModule {
    /**
     * @dev standard validateSignature for modules to validate and mark userOpHash as seen
     * @param userOp the operation that is about to be executed.
     * @param userOpHash hash of the user's request data. can be used as the basis for signature.
     * @return sigValidationResult sigAuthorizer to be passed back to trusting Account, aligns with validationData
     */
    function validateSignature(
        UserOperation calldata userOp,
        bytes32 userOpHash
    ) external returns (uint256 sigValidationResult);
}