template.php

См. документацию.

<?
    use Bitrix\Main\Localization\Loc;
\Bitrix\Main\Page\Asset::getInstance()->addCss("/bitrix/themes/.default/sale.css");
    Loc::loadMessages(__FILE__);
 
    $sum = round($params['PAYMENT_SHOULD_PAY'], 2);
?>
<div class="mb-4" >
    <p><?=Loc::getMessage('SALE_HANDLERS_PAY_SYSTEM_YANDEX_DESCRIPTION')." <strong>".SaleFormatCurrency($params['PAYMENT_SHOULD_PAY'], $payment->getField('CURRENCY'))."</strong>";?></p>
    <form id="paysystem-yandex-form" name="ShopForm" action="<?=$params['URL'];?>" method="post">
 
        <input type="hidden" name="ShopID" value="<?=htmlspecialcharsbx($params['YANDEX_SHOP_ID']);?>" >
        <input type="hidden" name="scid" value="<?=htmlspecialcharsbx($params['YANDEX_SCID']);?>" >
        <input type="hidden" name="customerNumber" value="<?=htmlspecialcharsbx($params['PAYMENT_BUYER_ID']);?>" >
        <input type="hidden" name="orderNumber" value="<?=htmlspecialcharsbx($params['PAYMENT_ID']);?>" >
        <input type="hidden" name="Sum" value="<?=number_format($sum, 2, '.', '')?>" >
        <input type="hidden" name="paymentType" value="<?=htmlspecialcharsbx($params['PS_MODE'])?>" >
        <input type="hidden" name="cms_name" value="1C-Bitrix" >
        <input type="hidden" name="BX_HANDLER" value="YANDEX" >
        <input type="hidden" name="BX_PAYSYSTEM_CODE" value="<?=$params['BX_PAYSYSTEM_CODE']?>" >
 
        <div class="d-flex align-items-center justify-content-start mb-4">
            <input class="btn btn-lg btn-success pl-4 pr-4" style="border-radius: 32px;" name="BuyButton" value="<?=Loc::getMessage('SALE_HANDLERS_PAY_SYSTEM_YANDEX_BUTTON_PAID')?>" type="submit">
            <p class="m-0 p-3"><?=Loc::getMessage('SALE_HANDLERS_PAY_SYSTEM_YANDEX_REDIRECT_MESS');?></p>
        </div>
 
        <div class="alert alert-info"><?=Loc::getMessage('SALE_HANDLERS_PAY_SYSTEM_YANDEX_WARNING_RETURN');?></div>
    </form>
</div>