1C Bitrix and Yandex Cash, how to generate / get a link to pay for the order?

The formation is based on the settings of the payment system and the generated order. If you open the code inspector at the last step of ordering, you can see that there is not a link to the payment, but a form that sends a post-request to yandex, and it already forms the payment page from the transmitted data https://yadi.sk/i / NvXjQ74D6e_bag

It is possible that GET-parameters are suitable for a request at https://demomoney.yandex.ru/eshop.xml

Then the link will look like https://demomoney.yandex.ru/eshop.xml?ShopID=сайт&scid=секретный код&customerNumber=номер клиента&orderNumber=номер заказа&Sum=сумма&paymentType=PC&cms_name=1C-Bitrix&BX_HANDLER=YANDEX&BX_PAYSYSTEM_CODE=3

Or you can try in the letter to send a form with payment. It is generated in this way (the code is taken from the standard bitrix:sale.order.ajax component bitrix:sale.order.ajax ):

 use Bitrix\Main, Bitrix\Main\Loader, Bitrix\Sale, Bitrix\Sale\Order, Bitrix\Sale\PaySystem, Bitrix\Sale\Payment; Loader::includeModule("sale"); $registry = Sale\Registry::getInstance(Sale\Registry::REGISTRY_TYPE_ORDER); $orderClassName = $registry->getOrderClassName(); $order = $orderClassName::loadByAccountNumber(10);// id заказа if ($order->isAllowPay()) { $paymentCollection = $order->getPaymentCollection(); foreach ($paymentCollection as $payment) { $arResult["PAYMENT"][$payment->getId()] = $payment->getFieldValues(); if (intval($payment->getPaymentSystemId()) > 0 && !$payment->isPaid()) { $paySystemService = PaySystem\Manager::getObjectById($payment->getPaymentSystemId()); if (!empty($paySystemService)) { $arPaySysAction = $paySystemService->getFieldsValues(); if ($paySystemService->getField('NEW_WINDOW') === 'N' || $paySystemService->getField('ID') == PaySystem\Manager::getInnerPaySystemId()){ $initResult = $paySystemService->initiatePay($payment, null, PaySystem\BaseServiceHandler::STRING); if ($initResult->isSuccess()) $arPaySysAction['BUFFERED_OUTPUT'] = $initResult->getTemplate(); // получаем форму оплаты из обработчика else $arPaySysAction["ERROR"] = $initResult->getErrorMessages(); } } } } } 

The easiest way is to send the client a link to the order page ?ORDER_ID=id заказа e-mail ?ORDER_ID=id заказа from where he can go to the payment page in one click.