realexpayment-got an error message after successful payment

Question

I am using realexpayment with amember-5.1.5 and using test account of realexpayment system.

when I signup and make payment using test card I am getting the following message and it does not redirect back to our site:

Your transaction has been successful but there was a problem connecting back to the merchant's web site. Please contact the merchant and advise them that you received this error message.

Answer 1

What this means is that our Hosted Payment Page (HPP) was not able to connect to the Response URL you provided us. This URL is specified in the HTTP POST in the field MERCHANT_RESPONSE_URL.

It must be a publicly accessible endpoint so our HPP can connect to it. Your Realex Payments account manager will be able to provide more information on the response we received from your server when we tried to connect to your Response URL, if you can provide to them the relevant Client ID and Order ID.

Best,

Seán MacDomhnall

Realex Payments

Answer 2

I tried the solution with JavaScript by @MrCarrot first and it didn't work, but later found another working one. I thought that, instead of just a comment, I mention a few bits about the response and error handling.

MERCHANT_RESPONSE_URL needs to be a public (and I assume HTTPS) address where your script waits for a POST from Realex servers. The POST looks like this:

[RESULT] => 00
[AUTHCODE] => 12345
[MESSAGE] => [ test system ] AUTHORISED
[PASREF] => 16542926167123558
[MERCHANT_ID] => merchantid
[ORDER_ID] => INV-223665
[TIMESTAMP] => 20220603224317
[AMOUNT] => 9480
[SHA1HASH] => 934138a1157dead529806e9ed5578f538e1a68c8

Now you really should check the SHA1HASH as described at Card Payments: Check hash. You will need the original TIMESTAMP your request was from, MERCHANT_ID, ORDER_ID, RESULT number, the MESSAGE, PASREF, and AUTHCODE. Implode these with a full stop, so you'll get something like

20220603224317.merchantid.INV-223665.00.[ test system ] AUTHORISED.16542926167123558.12345

and run sha1() on it. Then, add your secret

ea4dcce506c6e5ee3fbaeae212477be838733694.mySecr3t

and run sha1() again, then compare it with the SHA1HASH response. Only if it equals, you should mark the payment as valid and send header("HTTP/1.0 200 OK").

Then you can redirect back with the above JavaScript, and maybe instead of the whole message, you can just send this error id. What I do is to go back to my payment page with either /thanks or /error111 to show a possible error message.

<script language='javascript' type='text/javascript'>
 window.location.replace('https://pay.example.com/{orderId}/error{result}');
</script>

Answer 3

I had this issue recently and would like to provide some clarification. Realex doesn't redirect to the MERCHANT_RESPONSE_URL but instead displays its contents.

It appears to accept a basic HTML response but not a full blown HTML document.

What I did is to output a small piece of JavaScript on the MERCHANT_RESPONSE_URL page to redirect the customer to a different URL that contains our branding and success (or error) message:

<script>
    window.location=https://example.com/success?msg=<?php echo urlencode( $msg ); ?>
</script>