Pasargad Gateway Verify

$merchantCode = env('pasargad_merchant_code');
$terminalCode = env('pasargad_terminal_code');

    require_once(app_path()."/Helpers/files/gateways/pasargad/RSAProcessor.class.php");
    require_once(app_path()."/Helpers/files/gateways/pasargad/parser.php");

    $amount =  $Transaction->amount;

    $fields = array(
        'MerchantCode' => $merchantCode,            //shomare ye moshtari e shoma.
        'TerminalCode' => $terminalCode,            //shomare ye terminal e shoma.
        'InvoiceNumber' => "$Transaction->id",              //shomare ye factor tarakonesh.
        'InvoiceDate' => $InvoiceDate, //tarikh e tarakonesh.
        'amount' => "$amount",                  //mablagh e tarakonesh. faghat adad.
        'TimeStamp' => date("Y/m/d H:i:s"),     //zamane jari ye system.
        'sign' => ''                            //reshte ye ersali ye code shode. in mored automatic por mishavad.
    );

    $processor = new RSAProcessor(app_path()."/Helpers/files/gateways/pasargad/caligula/certificate.xml",RSAKeyType::XMLFile);

    $data = "#". $fields['MerchantCode'] ."#". $fields['TerminalCode'] ."#". $fields['InvoiceNumber'] ."#". $fields['InvoiceDate'] ."#". $fields['amount'] ."#". $fields['TimeStamp'] ."#";
    $data = sha1($data,true);
    $data =  $processor->sign($data);
    $fields['sign'] =  base64_encode($data); // base64_encode

    $sendingData =  "MerchantCode=". $merchantCode ."&TerminalCode=". $terminalCode ."&InvoiceNumber=". $fields['InvoiceNumber'] ."&InvoiceDate=". $fields['InvoiceDate'] ."&amount=". $amount ."&TimeStamp=". $fields['TimeStamp'] ."&sign=".$fields['sign'];

    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL,'https://pep.shaparak.ir/VerifyPayment.aspx');
    curl_setopt($ch, CURLOPT_POST, 1);
    curl_setopt($ch, CURLOPT_POSTFIELDS,$sendingData);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    $verifyresult = curl_exec ($ch);
    curl_close ($ch);

    $array = makeXMLTree($verifyresult);

    return $array;