Create Card Guard listener

CreateCardGuardListener.php

<?php

class CreateCardGuardListener implements EventSubscriberInterface
{
  public function guardCreateCard(GuardEvent $event) {
    /** @var CardApplication $cardApplication */
    $cardApplication = $event->getSubject();
    // By default block this transition.
    $event->setBlocked(true);
    // Only allow this transition if the requested limit is less then $200 or we have an approved credit limit.
    if ($cardApplication->getRequestedCreditLimit() < 200 || $cardApplication->getRequestedCreditLimit() <= $cardApplication->getAppprovedCreditLimit()) {
      $event->setBlocked(false);
    }
  }
  
  /**
   * Returns the events to which this class has subscribed.
   *
   * @return array
   */
  public static function getSubscribedEvents() {
    return [
      'workflow.creditcard_application_flow.guard.create_card' => array('guardCreateCard'),
    ];
  }
   
}

Line 10 in the example should be $200 in the comment to match line 11 of the code.