JFIFxxC      C  " }!1AQa"q2#BR$3br %&'()*456789:CDEFGHIJSTUVWXYZcdefghijstuvwxyz w!1AQaq"2B #3RbrCheckout. * * @property string $pay_currency * @property string $pay_amount * @property string $expire_at * @property string $payment_address */ class Checkout extends Order { }