How to send data to Yandex.Metrica e-commerce?

Question

JavaScript

I understand correctly that first in the js code goes:

window.dataLayer.push({
    "ecommerce": {
        "currencyCode": "RUB",
        "detail": {
            "products": [
                {
                    "id": "12342",
                    "name" : presidentName,
                    "price": 60.00,
                    "brand": "",
                    "category": chooseStr,
                    "variant" : ""
                }
            ]
        }
    }
});

And then we paste the code:

(function(m,e,t,r,i,k,a){m[i]=m[i]||function(){(m[i].a=m[i].a||[]).push(arguments)};
m[i].l=1*new Date();k=e.createElement(t),a=e.getElementsByTagName(t)[0],k.async=1,k.src=r,a.parentNode.insertBefore(k,a)})
(window, document, "script", "https://mc.yandex.ru/metrika/tag.js", "ym");

ym(6453123476, "init", {
    clickmap:true,
    trackLinks:true,
    accurateTrackBounce:true,
    webvisor:true,
    ecommerce:"dataLayer"
});

?

Answer 1

No, it's wrong. You have window.dataLayer before connecting Metrica is not defined.
E-commerce events are called after Metrica is connected, and not by themselves, but in response to specific user actions (viewing a product, removing it from the cart, buying, and others, as described in the documentation).