PayPal Refund Transaction Issue - php

Question

I am working with PayPal refund payment gateway. My main objective is to refund amount to the user and in the same time I have to pay certain amount to another user. Here I am acting as a admin, suppose if I have 150$ that is credited to me via PayPal. I have the transaction Id of it.Now I need to return suppose 100 $ to user1 and I need to send 20$ to user2.
<?php
/**
*
*
* This PayPal API provides the functionality of Refunding Amount.
* Credentials are omitted from here for privacy purpose. To use it credentials are compulsory to provide.
*/
class PayPalRefund
{
private $API_Username, $API_Password, $Signature, $API_Endpoint, $version;
function __construct($mode = "sandbox")
{
if($mode == "live")
{
$this->API_Username = "sample#gmail.com";
$this->API_Password = "137301275897";
$this->Signature = "AoNBG1CB1212IgLS5QaKlVpODjsaTncPABthzh5N-Nzz511tOodumbgF0TvVDq";
$this->API_Endpoint = "https://api-3t.paypal.com/nvp";
}
else
{
$this->API_Username = "sample#gmail.com";
$this->API_Password = "137301275897";
$this->Signature = "AoNBG1CB1212IgLS5QaKlVpODjsaTncPABthzh5N-Nzz5t11OodumbgF0TvVDq";
$this->API_Endpoint = "https://api-3t.sandbox.paypal.com/nvp";
}
$this->version = "51.0";
}
/**
* This function actually Sends the CURL Request for Refund
* #param string - $requestString
* #return array - returns the response
*/
function sendRefundRequest($requestString)
{
$this->API_UserName = urlencode($this->API_Username);
$this->API_Password = urlencode($this->API_Password);
$this->API_Signature = urlencode($this->Signature);
$this->version = urlencode($this->version);
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $this->API_Endpoint);
curl_setopt($ch, CURLOPT_VERBOSE, 1);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_POST, 1);
// Set the API operation, version, and API signature in the request.
$reqStr = "METHOD=RefundTransaction&VERSION={$this->version}&PWD={$this->API_Password}&USER={$this->API_UserName}&SIGNATURE={$this->API_Signature}$requestString";
// Set the request as a POST FIELD for curl.
curl_setopt($ch, CURLOPT_POSTFIELDS, $reqStr);
// Get response from the server.
$curlResponse = curl_exec($ch);
if(!$curlResponse)
return array("ERROR_MESSAGE"=>"RefundTransaction failed".curl_error($ch)."(".curl_errno($ch).")");
// Extract the response details.
$httpResponseAr = explode("&", $curlResponse);
$aryResponse = array();
foreach ($httpResponseAr as $i => $value)
{
$tmpAr = explode("=", $value);
if(sizeof($tmpAr) > 1)
{
$aryResponse[$tmpAr[0]] = urldecode($tmpAr[1]);
}
}
if((0 == sizeof($aryResponse)) || !array_key_exists('ACK', $aryResponse))
return array("ERROR_MESSAGE"=>"Invalid HTTP Response for POST request ($reqStr) to {$this->API_Endpoint}");
return $aryResponse;
}
/**
* #param array $aryData
* #return array
*/
function refundAmount($aryData)
{
if(trim(#$aryData['currencyCode'])=="")
return array("ERROR_MESSAGE"=>"Currency Code is Missing");
if(trim(#$aryData['refundType'])=="")
return array("ERROR_MESSAGE"=>"Refund Type is Missing");
if(trim(#$aryData['transactionID'])=="")
return array("ERROR_MESSAGE"=>"Transaction ID is Missing");
$requestString = "&TRANSACTIONID={$aryData['transactionID']}&REFUNDTYPE={$aryData['refundType']}&CURRENCYCODE={$aryData['currencyCode']}";
if(trim(#$aryData['invoiceID'])!="")
$requestString = "&INVOICEID={$aryData['invoiceID']}";
if(isset($aryData['memo']))
$requestString .= "&NOTE={$aryData['memo']}";
if(strcasecmp($aryData['refundType'], 'Partial') == 0)
{
if(!isset($aryData['amount']))
{
return array("ERROR_MESSAGE"=>"For Partial Refund - It is essential to mention Amount");
}
else
{
$requestString = $requestString."&AMT={$aryData['amount']}";
}
if(!isset($aryData['memo']))
{
return array("ERROR_MESSAGE"=>"For Partial Refund - It is essential to enter text for Memo");
}
}
$resCurl = $this->sendRefundRequest($requestString);
return $resCurl;
}
}
?>
and
/**
*
*
* This PayPal API provides the functionality of Refunding Amount.
* Credentials are omitted from here for privacy purpose. To use it credentials are compulsory to provide.
*/
/*
* Currency Types
* ('USD', 'GBP', 'EUR', 'JPY', 'CAD', 'AUD')
*
* Refund Type
* ('Partial', 'Full')
*
* Transaction ID
* We can get the Transaction ID from IPN Response
*/
/*
* Partial Refund
*/
$aryData['transactionID'] = "7H123X43620BH3959058";
$aryData['refundType'] = "Partial"; //Partial or Full
$aryData['currencyCode'] = "USD";
$aryData['amount'] = 2.00;
$aryData['memo'] = "There Memo Detail entered for Partial Refund";
// $aryData['invoiceID'] = "xxxxxxxxxx";
//echo "<pre>";
//print_r($aryData);die;
$ref = new PayPalRefund("sandbox");
$aryRes = $ref->refundAmount($aryData);
if($aryRes['ACK'] == "Success")
echo "Amount Refunded Successfully";
else
echo "Error Refunding Amount";
echo "<pre>";
print_r($aryRes);
echo "</pre>";
?>
and I am getting Error Refunding amount:
Error Refunding Amount
Array
(
[TIMESTAMP] => 2014-05-23T07:13:21Z
[CORRELATIONID] => f42e83df6f52b
[ACK] => Failure
[VERSION] => 51.0
[BUILD] => 11110362
[L_ERRORCODE0] => 10007
[L_SHORTMESSAGE0] => Permission denied
[L_LONGMESSAGE0] => You do not have permission to refund this transaction
[L_SEVERITYCODE0] => Error
)

Answer 1

you need to obtain permission from the user who received the funds and then issue a refund on his behalf.
read this to find out how.
change
"scope":"INVOICING"
to
"scope":"REFUND"