get, or default to everything.
	 * @return array|string
	 */
	protected function get_block_type_script( $key = null ) {
		$script = [
			'handle'       => 'wc-' . $this->block_name . '-block-frontend',
			'path'         => $this->asset_api->get_block_asset_build_path( $this->block_name . '-frontend' ),
			'dependencies' => [],
		];
		return $key ? $script[ $key ] : $script;
	}

	/**
	 * Get the frontend style handle for this block type.
	 *
	 * @return string[]
	 */
	protected function get_block_type_style() {
		return array_merge( parent::get_block_type_style(), [ 'wc-blocks-packages-style' ] );
	}

	/**
	 * Enqueue frontend assets for this block, just in time for rendering.
	 *
	 * @param array    $attributes  Any attributes that currently are available from the block.
	 * @param string   $content    The block content.
	 * @param WP_Block $block    The block object.
	 */
	protected function enqueue_assets( array $attributes, $content, $block ) {
		/**
		 * Fires before cart block scripts are enqueued.
		 *
		 * @since 2.6.0
		 */
		do_action( 'woocommerce_blocks_enqueue_cart_block_scripts_before' );
		parent::enqueue_assets( $attributes, $content, $block );
		/**
		 * Fires after cart block scripts are enqueued.
		 *
		 * @since 2.6.0
		 */
		do_action( 'woocommerce_blocks_enqueue_cart_block_scripts_after' );
	}

	/**
	 * Append frontend scripts when rendering the Cart block.
	 *
	 * @param array    $attributes Block attributes.
	 * @param string   $content    Block content.
	 * @param WP_Block $block      Block instance.
	 * @return string Rendered block type output.
	 */
	protected function render( $attributes, $content, $block ) {
		// Dequeue the core scripts when rendering this block.
		add_action( 'wp_enqueue_scripts', array( $this, 'dequeue_woocommerce_core_scripts' ), 20 );

		/**
		 * We need to check if $content has any templates from prior iterations of the block, in order to update to the latest iteration.
		 * We test the iteration version by searching for new blocks brought in by it.
		 * The blocks used for testing should be always available in the block (not removable by the user).
		 */

		$regex_for_filled_cart_block = '/<div[^<]*?data-block-name="woocommerce\/filled-cart-block"[^>]*?>/mi';
		// Filled Cart block was added in i2, so we search for it to see if we have a Cart i1 template.
		$has_i1_template = ! preg_match( $regex_for_filled_cart_block, $content );

		if ( $has_i1_template ) {
			/**
			 * This fallback structure needs to match the defaultTemplate variables defined in the block's edit.tsx files,
			 * starting from the parent block and going down each inner block, in the order the blocks were registered.
			 */
			$inner_blocks_html = '$0
			<div data-block-name="woocommerce/filled-cart-block" class="wp-block-woocommerce-filled-cart-block">
				<div data-block-name="woocommerce/cart-items-block" class="wp-block-woocommerce-cart-items-block">
					<div data-block-name="woocommerce/cart-line-items-block" class="wp-block-woocommerce-cart-line-items-block"></div>
				</div>
				<div data-block-name="woocommerce/cart-totals-block" class="wp-block-woocommerce-cart-totals-block">
					<div data-block-name="woocommerce/cart-order-summary-block" class="wp-block-woocommerce-cart-order-summary-block"></div>
					<div data-block-name="woocommerce/cart-express-payment-block" class="wp-block-woocommerce-cart-express-payment-block"></div>
					<div data-block-name="woocommerce/proceed-to-checkout-block" class="wp-block-woocommerce-proceed-to-checkout-block"></div>
					<div data-block-name="woocommerce/cart-accepted-payment-methods-block" class="wp-block-woocommerce-cart-accepted-payment-methods-block"></div>
				</div>
			</div>
			<div data-block-name="woocommerce/empty-cart-block" class="wp-block-woocommerce-empty-cart-block">
			';

			$content = preg_replace( '/<div class="[a-zA-Z0-9_\- ]*wp-block-woocommerce-cart[a-zA-Z0-9_\- ]*">/mi', $inner_blocks_html, $content );
			$content = $content . '</div>';
		}

		/**
		 * Cart i3 added inner blocks for Order summary. We need to add them to Cart i2 templates.
		 * The order needs to match the order in which these blocks were registered.
		 */
		$order_summary_with_inner_blocks = '$0
			<div data-block-name="woocommerce/cart-order-summary-heading-block" class="wp-block-woocommerce-cart-order-summary-heading-block"></div>
			<div data-block-name="woocommerce/cart-order-summary-subtotal-block" class="wp-block-woocommerce-cart-order-summary-subtotal-block"></div>
			<div data-block-name="woocommerce/cart-order-summary-fee-block" class="wp-block-woocommerce-cart-order-summary-fee-block"></div>
			<div data-block-name="woocommerce/cart-order-summary-discount-block" class="wp-block-woocommerce-cart-order-summary-discount-block"></div>
			<div data-block-name="woocommerce/cart-order-summary-coupon-form-block" class="wp-block-woocommerce-cart-order-summary-coupon-form-block"></div>
			<div data-block-name="woocommerce/cart-order-summary-shipping-form-block" class="wp-block-woocommerce-cart-order-summary-shipping-block"></div>
			<div data-block-name="woocommerce/cart-order-summary-taxes-block" class="wp-block-woocommerce-cart-order-summary-taxes-block"></div>
		';
		// Order summary subtotal block was added in i3, so we search for it to see if we have a Cart i2 template.
		$regex_for_order_summary_subtotal = '/<div[^<]*?data-block-name="woocommerce\/cart-order-summary-subtotal-block"[^>]*?>/mi';
		$regex_for_order_summary          = '/<div[^<]*?data-block-name="woocommerce\/cart-order-summary-block"[^>]*?>/mi';
		$has_i2_template                  = ! preg_match( $regex_for_order_summary_subtotal, $content );

		if ( $has_i2_template ) {
			$content = preg_replace( $regex_for_order_summary, $order_summary_with_inner_blocks, $content );
		}

		return $content;
	}

	/**
	 * Extra data passed through from server to client for block.
	 *
	 * @param array $attributes  Any attributes that currently are available from the block.
	 *                           Note, this will be empty in the editor context when the block is
	 *                           not in the post content on editor load.
	 */
	protected function enqueue_data( array $attributes = [] ) {
		parent::enqueue_data( $attributes );

		$this->asset_data_registry->add( 'countryData', CartCheckoutUtils::get_country_data() );
		$this->asset_data_registry->add( 'displayItemizedTaxes', 'itemized' === get_option( 'woocommerce_tax_total_display' ) );
		$this->asset_data_registry->add( 'displayCartPricesIncludingTax', 'incl' === get_option( 'woocommerce_tax_display_cart' ) );
		$this->asset_data_registry->add( 'taxesEnabled', wc_tax_enabled() );
		$this->asset_data_registry->add( 'couponsEnabled', wc_coupons_enabled() );
		$this->asset_data_registry->add( 'shippingEnabled', wc_shipping_enabled() );
		$this->asset_data_registry->add( 'hasDarkEditorStyleSupport', current_theme_supports( 'dark-editor-style' ) );
		$this->asset_data_registry->register_page_id( isset( $attributes['checkoutPageId'] ) ? $attributes['checkoutPageId'] : 0 );
		$this->asset_data_registry->add( 'isBlockTheme', wp_is_block_theme() );
		$this->asset_data_registry->add( 'shippingMethodsExist', CartCheckoutUtils::shipping_methods_exist() > 0 );

		$is_block_editor = $this->is_block_editor();

		// Check `current_user_can` so we can show notices about incompatible extensions in the front-end to admins too.
		if ( ( $is_block_editor || current_user_can( 'manage_woocommerce' ) ) && ! $this->asset_data_registry->exists( 'incompatibleExtensions' ) ) {
			if ( class_exists( '\Automattic\WooCommerce\Utilities\FeaturesUtil' ) && function_exists( 'get_plugins' ) ) {
				$declared_extensions     = \Automattic\WooCommerce\Utilities\FeaturesUtil::get_compatible_plugins_for_feature( 'cart_checkout_blocks' );
				$all_plugins             = \get_plugins();
				$incompatible_extensions = array_reduce(
					$declared_extensions['incompatible'],
					function ( array $acc, $item ) use ( $all_plugins ) {
						$plugin      = $all_plugins[ $item ] ?? null;
						$plugin_id   = $plugin['TextDomain'] ?? dirname( $item );
						$plugin_name = $plugin['Name'] ?? $plugin_id;
						$acc[]       = [
							'id'    => $plugin_id,
							'title' => $plugin_name,
						];
						return $acc;
					},
					[]
				);
				$this->asset_data_registry->add( 'incompatibleExtensions', $incompatible_extensions );
			}
		}

		// Hydrate the following data depending on admin or frontend context.
		if ( ! is_admin() && ! WC()->is_rest_api_request() ) {
			$this->asset_data_registry->hydrate_api_request( '/wc/store/v1/cart' );
		}

		/**
		 * Fires after cart block data is registered.
		 *
		 * @since 2.6.0
		 */
		do_action( 'woocommerce_blocks_cart_enqueue_data' );
	}

	/**
	 * Register script and style assets for the block type before it is registered.
	 *
	 * This registers the scripts; it does not enqueue them.
	 */
	protected function register_block_type_assets() {
		parent::register_block_type_assets();
		$chunks        = $this->get_chunks_paths( $this->chunks_folder );
		$vendor_chunks = $this->get_chunks_paths( 'vendors--cart-blocks' );
		$shared_chunks = [];
		$this->register_chunk_translations( array_merge( $chunks, $vendor_chunks, $shared_chunks ) );
	}

	/**
	 * Get list of Cart block & its inner-block types.
	 *
	 * @return array;
	 */
	public static function get_cart_block_types() {
		return [
			'Cart',
			'CartOrderSummaryTaxesBlock',
			'CartOrderSummarySubtotalBlock',
			'CartOrderSummaryTotalsBlock',
			'FilledCartBlock',
			'EmptyCartBlock',
			'CartTotalsBlock',
			'CartItemsBlock',
			'CartLineItemsBlock',
			'CartOrderSummaryBlock',
			'CartExpressPaymentBlock',
			'ProceedToCheckoutBlock',
			'CartAcceptedPaymentMethodsBlock',
			'CartOrderSummaryCouponFormBlock',
			'CartOrderSummaryDiscountBlock',
			'CartOrderSummaryFeeBlock',
			'CartOrderSummaryHeadingBlock',
			'CartOrderSummaryShippingBlock',
			'CartCrossSellsBlock',
			'CartCrossSellsProductsBlock',
		];
	}
}