function check_pay_email()
    {
        $data = array('status' => 'error');
        try {
            $this->load->model('user_model');
            $pay_email = $this->input->post('pay_email', true);
            if (!filter_var($pay_email, FILTER_VALIDATE_EMAIL) OR
			strlen($pay_email) > 255) {
                throw new Exception("Incorrect email", 1);
            }
            $pass = $this->input->post('pass', true);
            if (NULL == $pass OR strlen($pass) > 36 OR strlen($pass) <= 4) {
                throw new Exception("Incorrect length of password", 1);
            }
            $pay_type = $this->input->post('pay_type', true);
            $id = $this->userID;
            $user = $this->user_model->getByID($id);
            if ($user) {
                if ($user['pass'] == doPasswordHash($pass, $user['email'])) {
                    $params['pay_email'] = $pay_email;
                    $params['pay_type'] = $pay_type;
                    $this->db->where('id_user', $id);
                    $res = $this->db->update('users', $params);
                    //return true;
                } else throw new Exception("Password error");
            }
            $data['status'] = 'done';
        } catch (Exception $e) {
            $data['status'] = 'error';
            $data['message'] = $e->getMessage();
            $data['code'] = $e->getCode();
        }
        echo json_encode($data);
    }