text: <?php
  /**
   * Copyright © Magento, Inc. All rights reserved.
   * See COPYING.txt for license details.
   */
  
  namespace Magento\Tax\Api;
  
  /**
   * Tax calculation interface.
   * @api
   * @since 100.0.2
   */
  interface TaxCalculationInterface
  {
      /**#@+
       * Type of calculation used
       */
      const CALC_UNIT_BASE = 'UNIT_BASE_CALCULATION';
      const CALC_ROW_BASE = 'ROW_BASE_CALCULATION';
      const CALC_TOTAL_BASE = 'TOTAL_BASE_CALCULATION';
      /**#@-*/
  
      /**
       * Calculate Tax
       *
       * @param \Magento\Tax\Api\Data\QuoteDetailsInterface $quoteDetails
       * @param null|int $storeId
       * @param bool $round
       * @return \Magento\Tax\Api\Data\TaxDetailsInterface
       */
      public function calculateTax(
          \Magento\Tax\Api\Data\QuoteDetailsInterface $quoteDetails,
          $storeId = null,
          $round = true
      );
  
      /**
       * Get default rate request
       *
       * @param int $productTaxClassID
       * @param int $customerId
       * @param string $storeId
       * @return float
       */
      public function getDefaultCalculatedRate($productTaxClassID, $customerId = null, $storeId = null);
  
      /**
       * Get rate request
       *
       * @param int $productTaxClassID
       * @param int $customerId
       * @param string $storeId
       * @return float
       */
      public function getCalculatedRate($productTaxClassID, $customerId = null, $storeId = null);
  }
  