Payment notification

After payment, a request containing payment information will be sent to the notification URL specified in your store settings.

Key	Description
shop_id	Public key of the project
amount	Amount of payment
order_id	Order ID
payment_system	Payment system
currency	Payment currency (RUB, USD, EUR)
test	If it was set when paying
sign	Request signature

The signature is formed in the same way as when creating the form, but all fields are involved in the formation of the hash, for example

<?php 
$secret = 'GB%^&*YJni677';
$data = $_POST;
unset($data['sign']);
ksort($data);
$str = http_build_query($data);
$sign = md5($str . $secret);