Due to several request we added GUID into dataLayer. Here is the example from https://classic.shoptet.cz
For getShoptetDataLayer('cart');:
{
"code": "314",
"guid": "c36b2df2-958b-11ed-935a-0cc47a6b4bcc",
"priceId": 1784,
"quantity": 1,
"priceWithVat": 189,
"priceWithoutDiscount": 189,
"discounts": {
"quantityRatio": 1,
"customerRatio": 1,
"volumeRatio": 1,
"couponRatio": 1,
"unknown": 1,
"minimalRatio": null,
"customerGroupMaximum": null,
"cashDeskPriceRatio": 1,
"summaryRatio": 1,
"finalRatio": 1
},
"itemId": "66388ff0be7a0",
"name": "Keramická miska BOLA",
"weight": 0
}