How to manually manipulate ibEconomy, and properly log tx

<?php
// How to manually manipulate ibEconomy, and properly log a transaction while doing so
// (C) Zefie Networks - Unlicensed - You are free to do as you wish with this code.

class custom_actions_premiumsub {
        protected $registry;
        protected $DB;
        protected $settings;
        protected $request;
        protected $lang;
        protected $member;
        protected $memberData;
        protected $cache;
        protected $caches;

        function __construct(){
                $this->registry = ipsRegistry::instance();
                $this->DB           =  $this->registry->DB();
                $this->settings     =& $this->registry->fetchSettings();
                $this->request      =& $this->registry->fetchRequest();
                $this->lang         =  $this->registry->getClass('class_localization');
                $this->member       =  $this->registry->member();
                $this->memberData       =& $this->registry->member()->fetchMemberData();
                $this->cache        =  $this->registry->cache();
                $this->caches       =& $this->registry->cache()->fetchCaches();
                if( !isset($this->registry->mysql_ibEconomy) )
                {
                        require_once( IPSLib::getAppDir( 'ibEconomy' ) . '/sql/mysql_ibEconomy.php' );
                        $this->registry->mysql_ibEconomy = new ibEconomyMySQL( $this->registry );
                }
                if( !isset($this->registry->ecoclass) )
                {
                        require_once( IPSLib::getAppDir( 'ibEconomy' ) . '/sources/ecoclass.php' );
                        $this->registry->ecoclass = new class_ibEconomy( $this->registry );
                }
        }

        public function onPaid ($member, $package, $invoice) {
                $points2Add = 50;
                # Add points
                $this->registry->mysql_ibEconomy->updateMemberPts( $member['member_id'], $points2Add, '+', TRUE );
                # Log in transaction logs
        // 'subreward' is read from ibEconomy/public_ibEconomy lang pack
                $this->registry->ecoclass->addLog( 'subreward', $points2Add, $member['member_id'], 'subscription', 'Premium Subscription Reward' );
        }
}