/** * Map this object's API credentials to the PayPal NVP format for posting to the API. * * Abstracted from @see get_payment_details_url for readability. */ protected function get_api_credentials_url() { return 'USER='******'&PWD=' . urlencode(PayPal_Digital_Goods_Configuration::password()) . '&SIGNATURE=' . urlencode(PayPal_Digital_Goods_Configuration::signature()) . '&VERSION=' . urlencode(PayPal_Digital_Goods_Configuration::version()); }