Affiliates Tracking with WP Affiliate Platform

$sale_amt = "{affiliates_ordertotal}";
$unique_transaction_id = "{affiliates_orderid}";
$email = "{affiliates_useremail}";
$referrer = $_COOKIE['ap_id'];
do_action('wp_affiliate_process_cart_commission', array("referrer" => $referrer, "sale_amt" => $sale_amt, "txn_id" => $unique_transaction_id, "buyer_email" => $email));