Cancel payment of subscription but not subscription

first issue solved with this code (just add tho functions.php in custom theme):

$cancelled = false;
function on_cancelled_subscription($user_id) {
	if (!$cancelled) {
		update_user_meta( $user_id, '_disable_vendor', false );
		$user = get_user_by( 'id', $user_id );
		$user->set_role( 'wcfm_vendor' );
	}
	$cancelled = true;
}
add_action('wcfm_membership_data_reset', 'on_cancelled_subscription');

$cancelled flag is used because the action ‘on_cancelled_subscription’ may be called more tha one time, so it prevents from spamming the database

this code was made by ¿reverse-engineered? the file class-wcfmvm.php