openzeppelin-contracts/contracts/mocks/GovernorWithParamsMock.sol

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "../governance/extensions/GovernorCountingSimple.sol";
import "../governance/extensions/GovernorVotes.sol";

contract GovernorWithParamsMock is GovernorVotes, GovernorCountingSimple {
    event CountParams(uint256 uintParam, string strParam);

    constructor(string memory name_, IVotes token_) Governor(name_) GovernorVotes(token_) {}

    function quorum(uint256) public pure override returns (uint256) {
        return 0;
    }

    function votingDelay() public pure override returns (uint256) {
        return 4;
    }

    function votingPeriod() public pure override returns (uint256) {
        return 16;
    }

    function _getVotes(
        address account,
        uint256 blockNumber,
        bytes memory params
    ) internal view override(Governor, GovernorVotes) returns (uint256) {
        uint256 reduction = 0;
        // If the user provides parameters, we reduce the voting weight by the amount of the integer param
        if (params.length > 0) {
            (reduction, ) = abi.decode(params, (uint256, string));
        }
        // reverts on overflow
        return super._getVotes(account, blockNumber, params) - reduction;
    }

    function _countVote(
        uint256 proposalId,
        address account,
        uint8 support,
        uint256 weight,
        bytes memory params
    ) internal override(Governor, GovernorCountingSimple) {
        if (params.length > 0) {
            (uint256 _uintParam, string memory _strParam) = abi.decode(params, (uint256, string));
            emit CountParams(_uintParam, _strParam);
        }
        return super._countVote(proposalId, account, support, weight, params);
    }

    function cancel(
        address[] memory targets,
        uint256[] memory values,
        bytes[] memory calldatas,
        bytes32 salt
    ) public returns (uint256 proposalId) {
        return _cancel(targets, values, calldatas, salt);
    }
}