This is a very common task that you can accomplish. There are 2 ways you can achieve this effect.

WARNING! You can update only the value of pending commissions. Please update it before accepting/rejecting it, wait for the HTTP call to finish, and then make the call to accept or reject.

Hook into your ecommerce app

We recommend changing a commission's value and status as soon as an order is updated. Assuming that you already have:

• the order ID (in a variable called $orderId)
• the order status (in a variable called $orderStatus), if the amount of the order changed:
• the order's old amount, without taxes, shipping and discounts (in a variable called $orderOldAmount),
• the order's new amount, without taxes, shipping and discounts (in a variable called $orderNewAmount),

you should do something like below.

use TPerformant\API\HTTP\Advertiser;
use TPerformant\API\Exception\TPException;

...

$me = new Advertiser('[email protected]', 'password');

// get all commissions with that order ID
$commissions = $me->getTransaction($orderId);

try {
    if($commissions) {
        foreach($commisions as $c) {
            if($c->getStatus() == 'pending') {
                
                // $orderOldAmount and $orderNewAmount must not include tax, shipping and discounts
                if($orderOldAmount != $orderNewAmount) {
                    // Commissions are returned in the defaul currency, EUR
                    // Adjust proportionally with the change in the order amount, and send it in EUR as well
                    $c->edit('Order changed', [
                        'amount' => round($c->getAmount() * $orderNewAmount / $orderOldAmount, 2),
                        'currencyCode' => 'EUR'
                    ], $newOrderDescription)
                }
                
                switch($orderStatus) {
                    // These are example statuses, you have to check the values
                    // that your ecommerce app uses
                    case 'finalized':
                        $c->accept();
                        break;
                    case 'cancelled':
                        $c->reject('Order cancelled');
                        break;
                    case 'customer_return':
                        $c->reject('Customer returned order');
                        break;
                    // case 'in_progress':
                        // Do not update anything
                }
            }
        }
    }
} catch(TPException $e) {
    // handle the error somehow
}