shopify - Shopify 运费响应中货币属性的用途是什么？

Question

根据 CarrierService API 文档，运费响应应包含货币属性：http ://docs.shopify.com/api/carrierservice

下面的运费示例响应仍然导致 Shopify 在结账时以美元（或任何默认商店货币）显示所有这三种货币，没有转换，即相应的欧元和英镑分别为 12.95 美元和 29.34 美元。

{
  "rates" => [
    {
      'service_name' => 'Method A',
      'service_code' => 'RMG9A',
      'total_price' => '1295', # cents
      'currency' => 'EUR',
      'min_delivery_date' => '2013-07-13 14:48:45 -0400',
      'max_delivery_date' => '2013-07-13 14:48:45 -0400'
    },
    {
      'service_name' => 'Method B',
      'service_code' => 'RMG1P',
      'total_price' => '2934', # cents
      'currency' => 'GBP',
      'min_delivery_date' => '2013-07-13 14:48:45 -0400',
      'max_delivery_date' => '2013-07-13 14:48:45 -0400'
    },
    {
      'service_name' => 'Method C',
      'service_code' => 'RMG1D',
      'total_price' => '2934', # cents
      'currency' => 'USD',
      'min_delivery_date' => '2013-07-13 14:48:45 -0400',
      'max_delivery_date' => '2013-07-13 14:48:45 -0400'
    }
  ]
}