dispatchCallbackEvents.php

<?php
// Delivered
$deliveryEvent = new DeliveryEvent();
$deliveryEvent->setContact($contact);
$deliveryEvent->setTrackingHash($trackingHash);
$deliveryEvent->setIsDelivered(true);

$this->callbackHelper->dispatchDeliveryEvent(
    $deliveryEvent
);

// Read

$deliveryEvent = new DeliveryEvent();
$deliveryEvent->setContact($contact);
$deliveryEvent->setTrackingHash($trackingHash);
$deliveryEvent->setIsRead(true);

$this->callbackHelper->dispatchDeliveryEvent(
    $deliveryEvent
);

// Failed

$deliveryEvent = new DeliveryEvent();
$deliveryEvent->setContact($contact);
$deliveryEvent->setTrackingHash($trackingHash);
$deliveryEvent->setIsFailed(true);

$this->callbackHelper->dispatchDeliveryEvent(
    $deliveryEvent
);

// Reply 

$replyEvent = new ReplyEvent();
$replyEvent->setContact($contact;
$replyEvent->setMessage('custom reply message');

$this->callbackHelper->dispatchReplyEvent(
    $replyEvent
);