Commerce決済モジュール設定をJavaScriptにデータに渡す方法

PHP側で

function MODULE_page_attachments(&$attachments) {
  if ($payment_gateway_storage = \Drupal::service('entity_type.manager')->getStorage('commerce_payment_gateway')) {
    if ($payment_gateways = $payment_gateway_storage->loadMultiple()) {
      foreach ($payment_gateways as $name => $payment_gateway) {
        if (strpos($name, 'MODULE') !== FALSE) {
          if ($configuration = $payment_gateway->get('configuration')) {
            $attachments['#attached']['drupalSettings']['MODULE']['configuration'] = $configuration;
          }
        }
      }
    }
  }
}

JavaScript側で

var configuration = drupalSettings.MODULE.configuration;