woocommerce_order_update_coupon action-hook . WC 1.0

Usage

add_action( 'woocommerce_order_update_coupon', 'action_function_name_7571', 10, 3 );
function action_function_name_7571( $id, $item_id, $args ){
	// action...
}

$id

-

$item_id

-

$args

-

Where the hook is called

do_action( 'woocommerce_order_update_coupon', $this->get_id(), $item->get_id(), $args );

Where in WP core the hook is used WooCommerce