woocommerce_update_option_(type) │ action-hook │ WC 1.0

Usage

add_action( 'woocommerce_update_option_(type)', 'wp_kama_woocommerce_update_option_type_action' );

/**
 * Function for `woocommerce_update_option_(type)` action-hook.
 * 
 * @param  $option 
 *
 * @return void
 */
function wp_kama_woocommerce_update_option_type_action( $option ){

	// action...
}

$option

-

Where the hook is called

do_action( 'woocommerce_update_option_' . sanitize_title( $option['type'] ), $option );

Where the hook is used in WooCommerce