Redirect back

After completing the payment in the online payment system, the buyer is redirected to the merchant page Success URL or Failure URL, depending on the result of the payment

Redirection occurs using the Success URL Method or Failure URL Method specified during payment initialization

If at GET request Success URL or Failure URL already contain parameters in query string, then additional parameters pg_order_id, pg_payment_id and custom variables of the merchant are appended to the end of query string. The merchant must ensure that the names of additional parameters do not match the names of existing parameters

The difference between Result URL and Success URL must be clearly understood

Result URL is called directly from the {{project}} server, while Success URL is called by the user's browser when {{project}} redirects the user back to the store site

It is wrong to use Success URL as the only way to find out about the completion of the payment, because the user may for various reasons (for example, when the connection is broken) not to reach the Success URL after the payment

The most reliable way to find out about the completion of the payment is to implement a Result URL, which {{project}} undertakes to call again every half an hour within 2 hours after the payment, if the first attempt for any reason failed

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