public static function wallet($serviceName)
{
if (!isset(self::$wallet)) {
//// Hack //// TODO: passar o init da sessão no login do expresso
Config::init();
if (isset($_SESSION['wallet'])) {
self::$wallet = $_SESSION['wallet'];
}
/////////////
}
return isset(self::$wallet[$serviceName]) ? self::$wallet[$serviceName] : false;
}