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\Bitrix\Main\EventManager::getInstance()->addEventHandler("sale", "OnSaleComponentOrderCreated", "OrderPropsChangePrice");
function OrderPropsChangePrice($order, &$arUserResult, $request, &$arParams, &$arResult,  &$arPaySystemServiceAll, &$arDeliveryServiceAll)
{

    $site_id = $order->getSiteId();

    /////////////////////////////////////////////
    //////////////// PROMOCODE //////////////////
    /////////////////////////////////////////////
    if ($site_id == "s1" or $site_id == "s4") $promocode = $arUserResult["ORDER_PROP"]["67"];
    if ($site_id == "s2" or $site_id == "s5") $promocode = $arUserResult["ORDER_PROP"]["69"];
    if ($site_id == "s3" or $site_id == "s6") $promocode = $arUserResult["ORDER_PROP"]["71"];

    if ($promocode != ""){

        $b_promocode_applicable = false;

        $b_promocode_cond_new_client = true;
        $b_promocode_cond_total_from = true;
        $b_promocode_cond_period_to = true;

        $arPromocodeFilter = Array("IBLOCK_ID" => 45, "PROPERTY_PROMOCODE" => $promocode, "ACTIVE" => "Y");
        $resPromocode = CIBlockElement::GetList(Array(), $arPromocodeFilter, false, false, array());
        if ($obPromocode = $resPromocode->GetNextElement())
        {   
            $arFields = $obPromocode->GetFields();
            $arProps = $obPromocode->GetProperties();

            $promocode_el_id = $arFields["ID"];

            $o_price = $order->getPrice();
            
            $amount = $arProps["AMOUNT"]["VALUE"];
            $amount_type = $arProps["AMOUNT_TYPE"]["VALUE"];

            $cond_new_client = $arProps["COND_FORNEWCUSTOMERS"]["VALUE"];
            $cond_total_from = $arProps["COND_TOTAL_FROM"]["VALUE"];
            $cond_period_to  = $arFields["DATE_ACTIVE_TO"];

            // DISCOUNT //
            if ($amount_type == "процент")
                $discount = floor($amount*$o_price/100);
            else
                $discount = $amount;
            // DISCOUNT //

            // B TOTAL FROM //
            if (floor($cond_total_from) > 0){
                if (floor($o_price) < floor($cond_total_from)) $b_promocode_cond_total_from = false;
            }
            // B TOTAL FROM //

            // B CURRENT USER //
            if ($cond_new_client == "yes"){
                global $USER;
                $ar_current_user_groups = $USER->GetUserGroupArray();
                if (!in_array(14, $ar_current_user_groups)) $b_promocode_cond_new_client = false;
            }
            // B CURRENT USER //

            // B PERIOD TO //
            if ($cond_period_to != ""){
                if (strtotime(date("Y-m-d H:i:s")) > strtotime($cond_period_to)){
                    $b_promocode_cond_period_to = false;
                }
            }
            // B PERIOD TO //

            if ($b_promocode_cond_total_from and $b_promocode_cond_new_client and $b_promocode_cond_period_to) $b_promocode_applicable = true;

            if ($o_price >= $discount and $b_promocode_applicable){
                $paymentCollection = $order->getPaymentCollection();

                if ($site_id == "s1" or $site_id == "s4") $promocode_payment_name = "Промокод";
                if ($site_id == "s2" or $site_id == "s5") $promocode_payment_name = "Промокод";
                if ($site_id == "s3" or $site_id == "s6") $promocode_payment_name = "Promocode";

                $promocode_payment = $paymentCollection->createItem();
                $paySystemService = \Bitrix\Sale\PaySystem\Manager::getObjectById(23);
                $promocode_payment->setFields(array(
                    'PAY_SYSTEM_ID' => $paySystemService->getField("PAY_SYSTEM_ID"),
                    'PAY_SYSTEM_NAME' => $promocode_payment_name,
                ));
               
                foreach ($paymentCollection as $payment) {
                    $sum = $payment->getSum();
                    $id = $payment->getPaymentSystemId();
                    if ($id==23){
                        if ($amount_type == "процент"){
                            $new_sum = floor($amount*$o_price/100);
                        }else{
                            $new_sum = $amount;
                        }
                        $payment->setFields(array('SUM' => $new_sum));
                        $payment->setPaid("Y");
                    }else{
                        if ($amount_type == "процент"){
                            $new_sum = $sum-floor($amount*$o_price/100);
                        }else{
                            $new_sum = $sum-$amount;
                        }
                        $payment->setFields(array('SUM' => $new_sum));
                    }
                }
            }
        }
    }
    /////////////////////////////////////////////
    //////////////// PROMOCODE //////////////////
    /////////////////////////////////////////////
}