mohhasbias · July 28, 2013 10:22
diff --git a/Skrill.php b/Skrill.php
 <?php
 /**
 * BoxBilling
 *
 * LICENSE
 *
 * This source file is subject to the license that is bundled
 * with this package in the file LICENSE.txt
 * It is also available through the world-wide-web at this URL:
 * http://www.boxbilling.com/LICENSE.txt
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to [email protected] so we can send you a copy immediately.
 *
 * @copyright Copyright (c) 2010-2012 BoxBilling (http://www.boxbilling.com)
 * @license   http://www.boxbilling.com/LICENSE.txt
 * @version   $Id$
 */
 class Payment_Adapter_Skrill
 {
    private $config = array();
    
    public function __construct($config)
    {
        $this->config = $config;
        
        if(!function_exists('curl_exec')) {
            throw new Exception('PHP Curl extension must be enabled in order to use Skrill gateway');
        }
        
        if(!$this->config['email']) {
            throw new Exception('Payment gateway "Skrill" is not configured properly. Please update configuration parameter "Skrill Email address" at "Configuration -> Payments".');
        }
    }

    public static function getConfig()
    {
        return array(
            'supports_one_time_payments'   =>  true,
            'supports_subscriptions'     =>  true,
            'description'     =>  'Enter your Skrill email to start accepting payments by Skrill.',
            'form'  => array(
                'email' => array('text', array(
                            'label' => 'Skrill email address for payments',
                            'validators'=>array('EmailAddress'),
                    ),
                 ),
            ),
        );
    }

    public function getHtml($api_admin, $invoice_id, $subscription)
    {
        $invoice = $api_admin->invoice_get(array('id'=>$invoice_id));
        $buyer = $invoice['buyer'];
        
        $p = array(
            ':id'=>sprintf('%05s', $invoice['nr']), 
            ':serie'=>$invoice['serie'], 
            ':title'=>$invoice['lines'][0]['title']
        );
        $title = __('Payment for invoice :serie:id [:title]', $p);
        $number = $invoice['nr'];
        
        if($subscription) {
            
            $subs = $invoice['subscription'];
            
            $data = array();
            $data['item_name']          = $title;
            $data['item_number']        = $number;
            $data['no_shipping']        = '1';
            $data['no_note']            = '1'; // Do not prompt payers to include a note with their payments. Allowable values for Subscribe buttons:
            $data['currency_code']      = $invoice['currency'];
            $data['return_url']             = $this->config['return_url'];
            $data['cancel_url']      = $this->config['cancel_url'];
            $data['notify_url']         = $this->config['notify_url'];
            $data['business']           = $this->config['email'];

            $data['cmd']                = '_xclick-subscriptions';
            $data['rm']                 = '2';

            $data['invoice_id']         = $invoice['id'];

            // 1 period Trial data
            //$data['a1']                 = $this->moneyFormat($invoice->totalAmount()); // Trial period 1 price. For a free trial period, specify 0.
            //$data['p1']                 = $invoice->firstPeriod(); // Trial period 1 duration. Required if you specify a1. Specify an integer value in the allowable range for the units of duration that you specify with t1.
            //$data['t1']                 = $invoice->firstPaymentTerm();

            // Recurrence info
            $data['a3']                 = $this->moneyFormat($invoice['total'], $invoice['currency']); // Regular subscription price.
            $data['p3']                 = $subs['cycle']; //Subscription duration. Specify an integer value in the allowable range for the units of duration that you specify with t3.

            /**
             * t3: Regular subscription units of duration. Allowable values:
             *  D – for days; allowable range for p3 is 1 to 90
             *  W – for weeks; allowable range for p3 is 1 to 52
             *  M – for months; allowable range for p3 is 1 to 24
             *  Y – for years; allowable range for p3 is 1 to 5
             */
            $data['t3']                 = $subs['unit'];

            $data['src']                = 1; //Recurring payments. Subscription payments recur unless subscribers cancel their subscriptions before the end of the current billing cycle or you limit the number of times that payments recur with the value that you specify for srt.
    //        $data['srt']                = 1; //Recurring times. Number of times that subscription payments recur. Specify an integer above 1. Valid only if you specify src="1".
            $data['sra']                = 1; //Reattempt on failure. If a recurring payment fails, PayPal attempts to collect the payment two more times before canceling the subscription.
            $data['charset']			= 'UTF-8'; //Sets the character encoding for the billing information/log-in page, for the information you send to PayPal in your HTML button code, and for the information that PayPal returns to you as a result of checkout processes initiated by the payment button. The default is based on the character encoding settings in your account profile.

            //client data
            $data['address1']			= $buyer['address'];
            $data['city']				= $buyer['city'];
            $data['email']				= $buyer['email'];
            $data['first_name']			= $buyer['first_name'];
            $data['last_name']			= $buyer['last_name'];
            $data['zip']				= $buyer['zip'];
            $data['state']				= $buyer['state'];
            $data['charset']            = "utf-8";
            
        } else {
            $data = array();
            
            // Merchants details
 	    	$data['pay_to_email'] = $this->config['email'];
 	    	$data['return_url'] = $this->config['return_url'];
 	    	$data['cancel_url'] = $this->config['cancel_url'];
        	$data['status_url'] = $this->config['notify_url'];
 	    	$data['language'] = "EN";

 		    // Payments Details
 		    $data['transaction_id'] = $invoice['id'];
 		    $data['amount'] = $invoice['total'];
 		    $data['currency'] = $invoice['currency'];

 		    // Client details
 		    $data['pay_from_email'] = $buyer['email'];
 		    $data['address'] = $buyer['address'];
 		    $data['firstname'] = $buyer['first_name'];
            $data['lastname'] = $buyer['last_name'];
            $data['city'] = $buyer['city'];
            $data['zip'] = $buyer['zip'];
            $data['state'] = $buyer['state'];
        }
        
        if($this->config['test_mode']) {
        	$url = 'http://www.moneybookers.com/app/test_payment.pl';
        } else {
        	$url = 'https://www.moneybookers.com/app/payment.pl';
        }
        
        return $this->_generateForm($url, $data);
    }

    public function processTransaction($api_admin, $id, $data, $gateway_id)
    {
        if(APPLICATION_ENV != 'testing' && !$this->_isIpnValid($data)) {
            throw new Exception('IPN is not valid');
        }
        
        $ipn = $data['post'];
        
        $tx = $api_admin->invoice_transaction_get(array('id'=>$id));
        
        if(!$tx['invoice_id']) {
            $api_admin->invoice_transaction_update(array('id'=>$id, 'invoice_id'=>$data['get']['bb_invoice_id']));
        }
        
        if(!$tx['type']) {
            $api_admin->invoice_transaction_update(array('id'=>$id, 'type'=>$ipn['txn_type']));
        }
        
        if(!$tx['txn_id']) {
            $api_admin->invoice_transaction_update(array('id'=>$id, 'txn_id'=>$ipn['txn_id']));
        }
        
        if(!$tx['txn_status']) {
            $api_admin->invoice_transaction_update(array('id'=>$id, 'txn_status'=>$ipn['payment_status']));
        }
        
        if(!$tx['amount']) {
            $api_admin->invoice_transaction_update(array('id'=>$id, 'amount'=>$ipn['mc_gross']));
        }
        
        if(!$tx['currency']) {
            $api_admin->invoice_transaction_update(array('id'=>$id, 'currency'=>$ipn['mc_currency']));
        }
        
        $invoice = $api_admin->invoice_get(array('id'=>$data['get']['bb_invoice_id']));
        $client_id = $invoice['client']['id'];
        
        switch ($ipn['txn_type']) {
            
            case 'web_accept':
            case 'subscr_payment':
                
                if($ipn['payment_status'] == 'Completed') {
                    $bd = array(
                        'id'            =>  $client_id,
                        'amount'        =>  $ipn['mc_gross'],
                        'description'   =>  'PayPal transaction '.$ipn['txn_id'],
                        'type'          =>  'PayPal',
                        'rel_id'        =>  $ipn['txn_id'],
                    );
                    $api_admin->client_balance_add_funds($bd);
                    $api_admin->invoice_batch_pay_with_credits(array('client_id'=>$client_id));
                }
                
                break;
            
            case 'subscr_signup':
                $sd = array(
                    'client_id'     =>  $client_id,
                    'gateway_id'    =>  $gateway_id,
                    'currency'      =>  $ipn['mc_currency'],
                    'sid'           =>  $ipn['subscr_id'],
                    'status'        =>  'active',
                    'period'        =>  str_replace(' ', '', $ipn['period3']),
                    'amount'        =>  $ipn['amount3'],
                    'rel_type'      =>  'invoice',
                    'rel_id'        =>  $invoice['id'],
                );
                $api_admin->invoice_subscription_create($sd);
                
                $t = array(
                    'id'            => $id, 
                    's_id'          => $sd['sid'],
                    's_period'      => $sd['period'],
                );
                $api_admin->invoice_transaction_update($t);
                break;

            case 'recurring_payment_suspended_due_to_max_failed_payment':
            case 'subscr_failed':
            case 'subscr_eot':
            case 'subscr_cancel':
                $s = $api_admin->invoice_subscription_get(array('sid'=>$ipn['subscr_id']));
                $api_admin->invoice_subscription_update(array('id'=>$s['id'], 'status'=>'canceled'));
                break;

            default:
                error_log('Unknown paypal transaction '.$id);
                break;
        }
        
        if($ipn['payment_status'] == 'Refunded') {
            $refd = array(
                'id'    => $invoice['id'],
                'note'  => 'PayPal refund '.$ipn['parent_txn_id'],
            );
            $api_admin->invoice_refund($refd);
        }
        
        $d = array(
            'id'        => $id, 
            'error'     => '',
            'error_code'=> '',
            'status'    => 'processed',
            'updated_at'=> date('c'),
        );
        $api_admin->invoice_transaction_update($d);
    }

    private function _isIpnValid($data)
    {
        // use http_raw_post_data instead of post due to encoding
        parse_str($data['http_raw_post_data'], $post);
 		$req = 'cmd=_notify-validate';
 		foreach ($post as $key => $value) {
 			$value = urlencode(stripslashes($value));
 			$req .= "&$key=$value";
 		}
 		$ret = $this->download('https://www.paypal.com/cgi-bin/webscr', $req);
 		return $ret == 'VERIFIED';
    }

    private function moneyFormat($amount, $currency)
    {
        //HUF currency do not accept decimal values
        if($currency == 'HUF') {
            return number_format($amount, 0);
        }
        return number_format($amount, 2, '.', '');
    }

 	private function download($url, $post_vars = false, $phd = array(), $contentType = 'application/x-www-form-urlencoded')
    {
 		$post_contents = '';
 		if ($post_vars) {
 			if (is_array($post_vars)) {
 				foreach($post_vars as $key => $val) {
 					$post_contents .= ($post_contents ? '&' : '').urlencode($key).'='.urlencode($val);
 				}
 			} else {
 				$post_contents = $post_vars;
 			}
 		}

 		$uinf = parse_url($url);
 		$host = $uinf['host'];
 		$path = $uinf['path'];
 		$path .= (isset($uinf['query']) && $uinf['query']) ? ('?'.$uinf['query']) : '';

 		$headers = Array(
 			($post_contents ? 'POST' : 'GET')." $path HTTP/1.1",
 			"Host: $host",
 		);
 		if ($phd) {
 			if (!is_array($phd)) {
 				$headers[count($headers)] = $phd;
 			} else {
 				$next = count($headers);
 				$count = count($phd);
 				for ($i = 0; $i < $count; $i++) { $headers[$next + $i] = $phd[$i]; }
 			}
 		}
 		if ($post_contents) {
 			$headers[] = "Content-Type: $contentType";
 			$headers[] = 'Content-Length: '.strlen($post_contents);
 		}

 		$ch = curl_init();
 		curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
 		curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
 		curl_setopt($ch, CURLOPT_URL,$url);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
 		curl_setopt($ch, CURLOPT_TIMEOUT, 600);
 		curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);

 		// Apply the XML to our curl call
 		if ($post_contents) {
 			curl_setopt($ch, CURLOPT_POST, 1);
 			curl_setopt($ch, CURLOPT_POSTFIELDS, $post_contents);
 		}

 		$data = curl_exec($ch);
 		if (curl_errno($ch)) return false;
 		curl_close($ch);

 		return $data;
 	}
    
    private function _generateForm($url, $data, $method = 'post')
    {
        $form  = '';
        $form .= '<form name="payment_form" action="'.$url.'" method="'.$method.'">' . PHP_EOL;
        foreach($data as $key => $value) {
            $form .= sprintf('<input type="hidden" name="%s" value="%s" />', $key, $value) . PHP_EOL;
        }
        $form .=  '<input class="bb-button bb-button-submit" type="submit" value="Pay with PayPal" id="payment_button"/>'. PHP_EOL;
        $form .=  '</form>' . PHP_EOL . PHP_EOL;

        if(isset($this->config['auto_redirect']) && $this->config['auto_redirect']) {
            $form .= sprintf('<h2>%s</h2>', __('Redirecting to PayPal.com'));
            $form .= "<script type='text/javascript'>$(document).ready(function(){    document.getElementById('payment_button').style.display = 'none';    document.forms['payment_form'].submit();});</script>";
        }

        return $form;
    }
 }
	<?php
	/**
	* BoxBilling
	*
	* LICENSE
	*
	* This source file is subject to the license that is bundled
	* with this package in the file LICENSE.txt
	* It is also available through the world-wide-web at this URL:
	* http://www.boxbilling.com/LICENSE.txt
	* If you did not receive a copy of the license and are unable to
	* obtain it through the world-wide-web, please send an email
	* to [email protected] so we can send you a copy immediately.
	*
	* @copyright Copyright (c) 2010-2012 BoxBilling (http://www.boxbilling.com)
	* @license http://www.boxbilling.com/LICENSE.txt
	* @version $Id$
	*/
	class Payment_Adapter_Skrill
	{
	private $config = array();

	public function __construct($config)
	{
	$this->config = $config;

	if(!function_exists('curl_exec')) {
	throw new Exception('PHP Curl extension must be enabled in order to use Skrill gateway');
	}

	if(!$this->config['email']) {
	throw new Exception('Payment gateway "Skrill" is not configured properly. Please update configuration parameter "Skrill Email address" at "Configuration -> Payments".');
	}
	}

	public static function getConfig()
	{
	return array(
	'supports_one_time_payments' => true,
	'supports_subscriptions' => true,
	'description' => 'Enter your Skrill email to start accepting payments by Skrill.',
	'form' => array(
	'email' => array('text', array(
	'label' => 'Skrill email address for payments',
	'validators'=>array('EmailAddress'),
	),
	),
	),
	);
	}

	public function getHtml($api_admin, $invoice_id, $subscription)
	{
	$invoice = $api_admin->invoice_get(array('id'=>$invoice_id));
	$buyer = $invoice['buyer'];

	$p = array(
	':id'=>sprintf('%05s', $invoice['nr']),
	':serie'=>$invoice['serie'],
	':title'=>$invoice['lines'][0]['title']
	);
	$title = __('Payment for invoice :serie:id [:title]', $p);
	$number = $invoice['nr'];

	if($subscription) {

	$subs = $invoice['subscription'];

	$data = array();
	$data['item_name'] = $title;
	$data['item_number'] = $number;
	$data['no_shipping'] = '1';
	$data['no_note'] = '1'; // Do not prompt payers to include a note with their payments. Allowable values for Subscribe buttons:
	$data['currency_code'] = $invoice['currency'];
	$data['return_url'] = $this->config['return_url'];
	$data['cancel_url'] = $this->config['cancel_url'];
	$data['notify_url'] = $this->config['notify_url'];
	$data['business'] = $this->config['email'];

	$data['cmd'] = '_xclick-subscriptions';
	$data['rm'] = '2';

	$data['invoice_id'] = $invoice['id'];

	// 1 period Trial data
	//$data['a1'] = $this->moneyFormat($invoice->totalAmount()); // Trial period 1 price. For a free trial period, specify 0.
	//$data['p1'] = $invoice->firstPeriod(); // Trial period 1 duration. Required if you specify a1. Specify an integer value in the allowable range for the units of duration that you specify with t1.
	//$data['t1'] = $invoice->firstPaymentTerm();

	// Recurrence info
	$data['a3'] = $this->moneyFormat($invoice['total'], $invoice['currency']); // Regular subscription price.
	$data['p3'] = $subs['cycle']; //Subscription duration. Specify an integer value in the allowable range for the units of duration that you specify with t3.

	/**
	* t3: Regular subscription units of duration. Allowable values:
	* D – for days; allowable range for p3 is 1 to 90
	* W – for weeks; allowable range for p3 is 1 to 52
	* M – for months; allowable range for p3 is 1 to 24
	* Y – for years; allowable range for p3 is 1 to 5
	*/
	$data['t3'] = $subs['unit'];

	$data['src'] = 1; //Recurring payments. Subscription payments recur unless subscribers cancel their subscriptions before the end of the current billing cycle or you limit the number of times that payments recur with the value that you specify for srt.
	// $data['srt'] = 1; //Recurring times. Number of times that subscription payments recur. Specify an integer above 1. Valid only if you specify src="1".
	$data['sra'] = 1; //Reattempt on failure. If a recurring payment fails, PayPal attempts to collect the payment two more times before canceling the subscription.
	$data['charset'] = 'UTF-8'; //Sets the character encoding for the billing information/log-in page, for the information you send to PayPal in your HTML button code, and for the information that PayPal returns to you as a result of checkout processes initiated by the payment button. The default is based on the character encoding settings in your account profile.

	//client data
	$data['address1'] = $buyer['address'];
	$data['city'] = $buyer['city'];
	$data['email'] = $buyer['email'];
	$data['first_name'] = $buyer['first_name'];
	$data['last_name'] = $buyer['last_name'];
	$data['zip'] = $buyer['zip'];
	$data['state'] = $buyer['state'];
	$data['charset'] = "utf-8";

	} else {
	$data = array();

	// Merchants details
	$data['pay_to_email'] = $this->config['email'];
	$data['return_url'] = $this->config['return_url'];
	$data['cancel_url'] = $this->config['cancel_url'];
	$data['status_url'] = $this->config['notify_url'];
	$data['language'] = "EN";

	// Payments Details
	$data['transaction_id'] = $invoice['id'];
	$data['amount'] = $invoice['total'];
	$data['currency'] = $invoice['currency'];

	// Client details
	$data['pay_from_email'] = $buyer['email'];
	$data['address'] = $buyer['address'];
	$data['firstname'] = $buyer['first_name'];
	$data['lastname'] = $buyer['last_name'];
	$data['city'] = $buyer['city'];
	$data['zip'] = $buyer['zip'];
	$data['state'] = $buyer['state'];
	}

	if($this->config['test_mode']) {
	$url = 'http://www.moneybookers.com/app/test_payment.pl';
	} else {
	$url = 'https://www.moneybookers.com/app/payment.pl';
	}

	return $this->_generateForm($url, $data);
	}

	public function processTransaction($api_admin, $id, $data, $gateway_id)
	{
	if(APPLICATION_ENV != 'testing' && !$this->_isIpnValid($data)) {
	throw new Exception('IPN is not valid');
	}

	$ipn = $data['post'];

	$tx = $api_admin->invoice_transaction_get(array('id'=>$id));

	if(!$tx['invoice_id']) {
	$api_admin->invoice_transaction_update(array('id'=>$id, 'invoice_id'=>$data['get']['bb_invoice_id']));
	}

	if(!$tx['type']) {
	$api_admin->invoice_transaction_update(array('id'=>$id, 'type'=>$ipn['txn_type']));
	}

	if(!$tx['txn_id']) {
	$api_admin->invoice_transaction_update(array('id'=>$id, 'txn_id'=>$ipn['txn_id']));
	}

	if(!$tx['txn_status']) {
	$api_admin->invoice_transaction_update(array('id'=>$id, 'txn_status'=>$ipn['payment_status']));
	}

	if(!$tx['amount']) {
	$api_admin->invoice_transaction_update(array('id'=>$id, 'amount'=>$ipn['mc_gross']));
	}

	if(!$tx['currency']) {
	$api_admin->invoice_transaction_update(array('id'=>$id, 'currency'=>$ipn['mc_currency']));
	}

	$invoice = $api_admin->invoice_get(array('id'=>$data['get']['bb_invoice_id']));
	$client_id = $invoice['client']['id'];

	switch ($ipn['txn_type']) {

	case 'web_accept':
	case 'subscr_payment':

	if($ipn['payment_status'] == 'Completed') {
	$bd = array(
	'id' => $client_id,
	'amount' => $ipn['mc_gross'],
	'description' => 'PayPal transaction '.$ipn['txn_id'],
	'type' => 'PayPal',
	'rel_id' => $ipn['txn_id'],
	);
	$api_admin->client_balance_add_funds($bd);
	$api_admin->invoice_batch_pay_with_credits(array('client_id'=>$client_id));
	}

	break;

	case 'subscr_signup':
	$sd = array(
	'client_id' => $client_id,
	'gateway_id' => $gateway_id,
	'currency' => $ipn['mc_currency'],
	'sid' => $ipn['subscr_id'],
	'status' => 'active',
	'period' => str_replace(' ', '', $ipn['period3']),
	'amount' => $ipn['amount3'],
	'rel_type' => 'invoice',
	'rel_id' => $invoice['id'],
	);
	$api_admin->invoice_subscription_create($sd);

	$t = array(
	'id' => $id,
	's_id' => $sd['sid'],
	's_period' => $sd['period'],
	);
	$api_admin->invoice_transaction_update($t);
	break;

	case 'recurring_payment_suspended_due_to_max_failed_payment':
	case 'subscr_failed':
	case 'subscr_eot':
	case 'subscr_cancel':
	$s = $api_admin->invoice_subscription_get(array('sid'=>$ipn['subscr_id']));
	$api_admin->invoice_subscription_update(array('id'=>$s['id'], 'status'=>'canceled'));
	break;

	default:
	error_log('Unknown paypal transaction '.$id);
	break;
	}

	if($ipn['payment_status'] == 'Refunded') {
	$refd = array(
	'id' => $invoice['id'],
	'note' => 'PayPal refund '.$ipn['parent_txn_id'],
	);
	$api_admin->invoice_refund($refd);
	}

	$d = array(
	'id' => $id,
	'error' => '',
	'error_code'=> '',
	'status' => 'processed',
	'updated_at'=> date('c'),
	);
	$api_admin->invoice_transaction_update($d);
	}

	private function _isIpnValid($data)
	{
	// use http_raw_post_data instead of post due to encoding
	parse_str($data['http_raw_post_data'], $post);
	$req = 'cmd=_notify-validate';
	foreach ($post as $key => $value) {
	$value = urlencode(stripslashes($value));
	$req .= "&$key=$value";
	}
	$ret = $this->download('https://www.paypal.com/cgi-bin/webscr', $req);
	return $ret == 'VERIFIED';
	}

	private function moneyFormat($amount, $currency)
	{
	//HUF currency do not accept decimal values
	if($currency == 'HUF') {
	return number_format($amount, 0);
	}
	return number_format($amount, 2, '.', '');
	}

	private function download($url, $post_vars = false, $phd = array(), $contentType = 'application/x-www-form-urlencoded')
	{
	$post_contents = '';
	if ($post_vars) {
	if (is_array($post_vars)) {
	foreach($post_vars as $key => $val) {
	$post_contents .= ($post_contents ? '&' : '').urlencode($key).'='.urlencode($val);
	}
	} else {
	$post_contents = $post_vars;
	}
	}

	$uinf = parse_url($url);
	$host = $uinf['host'];
	$path = $uinf['path'];
	$path .= (isset($uinf['query']) && $uinf['query']) ? ('?'.$uinf['query']) : '';

	$headers = Array(
	($post_contents ? 'POST' : 'GET')." $path HTTP/1.1",
	"Host: $host",
	);
	if ($phd) {
	if (!is_array($phd)) {
	$headers[count($headers)] = $phd;
	} else {
	$next = count($headers);
	$count = count($phd);
	for ($i = 0; $i < $count; $i++) { $headers[$next + $i] = $phd[$i]; }
	}
	}
	if ($post_contents) {
	$headers[] = "Content-Type: $contentType";
	$headers[] = 'Content-Length: '.strlen($post_contents);
	}

	$ch = curl_init();
	curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
	curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
	curl_setopt($ch, CURLOPT_URL,$url);
	curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
	curl_setopt($ch, CURLOPT_TIMEOUT, 600);
	curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);

	// Apply the XML to our curl call
	if ($post_contents) {
	curl_setopt($ch, CURLOPT_POST, 1);
	curl_setopt($ch, CURLOPT_POSTFIELDS, $post_contents);
	}

	$data = curl_exec($ch);
	if (curl_errno($ch)) return false;
	curl_close($ch);

	return $data;
	}

	private function _generateForm($url, $data, $method = 'post')
	{
	$form = '';
	$form .= '<form name="payment_form" action="'.$url.'" method="'.$method.'">' . PHP_EOL;
	foreach($data as $key => $value) {
	$form .= sprintf('<input type="hidden" name="%s" value="%s" />', $key, $value) . PHP_EOL;
	}
	$form .= '<input class="bb-button bb-button-submit" type="submit" value="Pay with PayPal" id="payment_button"/>'. PHP_EOL;
	$form .= '</form>' . PHP_EOL . PHP_EOL;

	if(isset($this->config['auto_redirect']) && $this->config['auto_redirect']) {
	$form .= sprintf('<h2>%s</h2>', __('Redirecting to PayPal.com'));
	$form .= "<script type='text/javascript'>$(document).ready(function(){ document.getElementById('payment_button').style.display = 'none'; document.forms['payment_form'].submit();});</script>";
	}

	return $form;
	}
	}