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<?xml version="1.0"?>
<config>
    <global>
        <events>
            <tnw_salesforce_billing_process>
                <observers>
                    <tnw<salesforce_salesforcebilling_billingprocess_process>observer>
                        <class>tnw_salesforce/observer</class>
                        <method>billingProcess</method>
                    </tnw_salesforce_billing_process>process_observer>
                </observers>
            </tnw_salesforce_billing_process>
        </events>
    </global>
</config>

<?php

/**
 * Class TNW_Salesforce_Model_Observer
 */
class TNW_Salesforce_Model_Observer
{
 
    public function billingProcess(Varien_Event_Observer $observer) {
		/** 
		 * Array of order IDs
		 * @var array $_order_ids 
		 *
		 * Example:
		 *     array (size=1)
		 *         0 => string '44' (length=2)
		 */
		$_order_ids = $observer->getData('orderIds');
 
		/** 
		 * Sting (success message to display)
		 * @var string $_message
		 *
		 * Example:
		 *     string 'SUCCESS: Upserting Invoice #103000003'
		 */
		$_message = $observer->getData('message');

		/**

		 * ENUM('salesforce','bulk')
		 * @var string $_message
		 *  
		 * Exmple:
		 *     string 'salesforce'
		 */
		$_type = $observer->getData('type');

		/** 
		 * The value is used only for abandoned card. It should contains following value: "abandoned".
		 * @var string $_object_type 
		 */
		$_object_type = $observer->getData('object_type');

		/** 
		 * The value is used only for queue synchronization mode detection.
		 * @var bool $_is_queue 
		 */
		$_is_queue = $observer->getData('isQueue');

		/** 
		 * The value contains Queue IDs if queue synchronization mode is used.
		 * @var array $_queue_ids
		 */
		$_queue_ids = $observer->getData('queueIds');

		// Your custom code
    }
 
}