FOX - WooCommerce Currency Switcher Professional

Plugin link: https://woocommerce.com/products/automatewoo-refer-a-friend/

to file functions.php of the current WordPress theme add next code:

• To convert a credit:

  add_filter('automatewoo/referrals/available_credit', function ($credit, $user_id) {
      if (class_exists('WOOCS') AND $credit > 0) {
          global $WOOCS;
          $credit = $WOOCS->woocs_exchange_value(floatval($credit));
      }
  
      return $credit;
  }, 10, 2);
  

• To convert a coupon:

  add_filter('automatewoo/referrals/coupon_data', function ($coupon_data, $coupon_code, $advocate_id, $coupon_object) {
      if (class_exists('WOOCS') AND $coupon_data['amount'] > 0) {
          global $WOOCS;
          $coupon_data['amount'] = wc_format_decimal($WOOCS->woocs_exchange_value(floatval($coupon_data['amount'])), 2);
      }
  
      return $coupon_data;
  }, 10, 4);
  
  add_filter('automatewoo/referrals/account_tab_title', function ($title) {
      if (class_exists('WOOCS')) {
          global $WOOCS;
          $WOOCS->current_currency = $WOOCS->default_currency;
      }
      return $title;
  }, 10);