function sellOnApproveForOrigin(
        IMultiToken _mtkn,
        uint256 _amount,
        ERC20 _throughToken,
        address[] _exchanges,
        bytes _datas,
        uint[] _datasIndexes 
    )
        public
    {
        sellOnApprove(
            _mtkn,
            _amount,
            _throughToken,
            _exchanges,
            _datas,
            _datasIndexes,
            tx.origin
        );
    }