BlockaPay send IPN response to the notification url that you have provided. IPN data is send in POST method.
[item_number] => <ITEM NUMBER>
[item_name] => <ITEM NAME>
[payment_amount] => <AMOUNT>
[payment_currency] => <CURRENCY CODE>
[payee_email] => <PAYEE EMAIL>
[payer_email] => <PAYER EMAIL>
[payment_status] => <PAYMENT STATUS>
[txn_id] => <TRANSACTION ID>
[custom] => <CUSTOM1> , <CUSTOM2> , <CUSTOM3>
$custom = unserialize($_POST['custom']);
$customfield1 = $custom['custom1'];
$customfield2 = $custom['custom2'];
$customfield3 = $custom['custom3'];
To integrate the Instant Payment Notification (IPN) functionality into your website, follow these steps:
<form action="https://blockapay.com/index.php/payment/instant_payment_notification_login" method="post">