App\Ninja\PaymentDrivers\BasePaymentDriver::paymentUrl PHP Method

    protected function paymentUrl($gatewayTypeAlias)
    {
        $account = $this->account();
        $url = URL::to("/payment/{$this->invitation->invitation_key}/{$gatewayTypeAlias}");
        $gatewayTypeId = GatewayType::getIdFromAlias($gatewayTypeAlias);
        // PayPal doesn't allow being run in an iframe so we need to open in new tab
        if ($gatewayTypeId === GATEWAY_TYPE_PAYPAL) {
            $url .= '#braintree_paypal';
            if ($account->iframe_url) {
                return 'javascript:window.open("' . $url . '", "_blank")';
            }
        }
        return $url;
    }