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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);
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