public function init() {
        parent::init();

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

        $opts = $this->module->getActingOpts();

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

        // components
        $this->childComponents = [
            'purchaseButton' => new VueComponentLoader(
                new ConfirmPurchaseButton($amzproducttype, $chargetype, 'welcart'),
                true
            ),
        ];

        $this->amzProductType = strtolower($amzproducttype);

        // styles
        Theme::enqueueThemeCss(WCEXAAP_PLUGIN_URL);
        $semantic = new Semantic();
        $semantic->loadMessageCss();
        wp_enqueue_style(
            'checkout_review',
            WCEXAAP_PLUGIN_URL . '/src/Views/ConfirmPageReview/Review.css',
            [],
            WCEXAAP_VERSION
        );

        // scripts
        $deps = [Checkout::AMAZON_CHECKOUT_JS_SLUG];
        $checkoutSessionId = isset($_REQUEST['amazonCheckoutSessionId']) ? $_REQUEST['amazonCheckoutSessionId'] : '';
        $this->checkoutDetailsComp = new AmazonCheckoutDetails($this->module, $checkoutSessionId);
        if (!empty($this->checkoutDetailsComp->getAddressError())) {
            (new ChangeActions($this->module))->load(
                $this->checkoutDetailsComp->getCheckoutSessionId(),
                ['updateShippingAddressButton1', 'updateShippingAddressButton2']
            );
            $this->checkoutDetailsComp->loadAddressErrorMessageBoxCss();
            $deps[] = ChangeActions::WCEXAAP_CHANGE_ACTIONS_JS_SLUG;
        } else {
            wp_enqueue_script(
                Checkout::AMAZON_CHECKOUT_JS_SLUG,
                $opts['amzjsurl'] . '/checkout.js',
                [],
                WCEXAAP_VERSION,
                true
            );
        }

        wp_enqueue_script(
            'wcexaap-welcart-checkout-review',
            WCEXAAP_PLUGIN_URL . '/dist/confirmPage.js',
            $deps,
            WCEXAAP_VERSION,
            true
        );

        // script vars
        $jsvars = [];
        $jsvars['childComponents'] = $this->childComponents;
        $jsvars['payAndShip'] = $amzproducttype === 'PayAndShip';
        $jsvars['checkoutSessionId'] = $checkoutSessionId;
        $jsvars['addressError'] = $this->checkoutDetailsComp->getAddressError();
        $jsvars = array_merge($jsvars, $this->module->getScriptInjectionVariables());
        wp_localize_script('wcexaap-welcart-checkout-review', AmazonPay::L10N, $jsvars);

        return $this;
    }