interface IYouswapInviteV1 {

    struct UserInfo {
        address upper;//上级
        address[] lowers;//下级
        uint256 startBlock;//邀请块高
    }

    event InviteV1(address indexed owner, address indexed upper, uint256 indexed height);//被邀请人的地址，邀请人的地址，邀请块高

    function inviteCount() external view returns (uint256);//邀请人数

    function inviteUpper1(address) external view returns (address);//上级邀请

    function inviteUpper2(address) external view returns (address, address);//上级邀请

    function inviteLower1(address) external view returns (address[] memory);//下级邀请

    function inviteLower2(address) external view returns (address[] memory, address[] memory);//下级邀请

    function inviteLower2Count(address) external view returns (uint256, uint256);//下级邀请
    
    function register() external returns (bool);//注册邀请关系

    function acceptInvitation(address) external returns (bool);//注册邀请关系
    
    function inviteBatch(address[] memory) external returns (uint, uint);//注册邀请关系：输入数量，成功数量

}
function inviteUpper1(address) external view returns (address);
//邀请人数