API REQUEST<pre>Array
(
    [salt] => c9dd0990371631e5eb113178d19c240e
    [merchant] => PUBLICTESTHUF
    [transactionId] => 124050fb-e926-40b1-8b87-847b49df793b
    [orderRef] => 17823820814417905934513091
    [currency] => HUF
    [sdkVersion] => SimplePay_PHP_SDK_2.1.5_250731:2a42ece1c98994c7480f7573971f0327
)
</pre>API RESULT<pre>Array
(
    [responseBody] => 
    [responseSignature] => MISSING_HEADER_SIGNATURE
    [responseSignatureValid] => 
)
</pre>