OptionalnameName of the product from the merchant's catalog.
OptionalpricePrice of the product without VAT.
Optionalprice_Price of a single product item with VAT.
OptionalquantityNumber of product items for the purchase.
Optionalsingle_Amount of the VAT for a single product item (calculated as the product of price and vat_rate, i.e. single_vat_amount = price * vat_rate).
Optionaltotal_Total price of the product items without VAT (calculated as the product of price and quantity, i.e. total_price = price * quantity).
Optionaltotal_Total price of the product items including VAT (calculated as the product of price_with_vat and quantity, i.e. total_with_vat = price_with_vat * quantity).
Optionalvat_Total VAT amount for the purchase (calculated as the product of single_vat_amount and quantity, i.e. vat_amount = single_vat_amount * quantity).
Optionalvat_VAT rate applicable to the product.
Details of the product for which the payment is made.