public function getCheckoutParams() {
        $chargetype = 'once';
        $amzproducttype = 'PayAndShip';
        if (defined('WCEX_DLSELLER')) {
            if (!dlseller_have_shipped()) {
                $amzproducttype = 'PayOnly';
            }
        }

        // override Amazon address if Welcart address is preferred in settings
        $whichAddress = $this->module->getActingOpts()['address_priority'];
        if ($whichAddress === 'welcart') {
            $amzproducttype = 'PayOnly';
        }

        $urlpt = strtolower($amzproducttype);
        return [
            'url' => "/checkout/welcart/{$urlpt}/{$chargetype}/createSession",
            'productType' => $amzproducttype,
        ];
    }