NPC - purchase

window.dataLayer = window.dataLayer || [];
window.dataLayer.push({ ecommerce: null });
window.dataLayer.push({
  event: 'purchase',            // name of the event. In this case, it always must be purchase
  ecommerce: {
    currency: 'EUR',
    value: 600.00,                      // order total (price of all products). If you want, it can be only price of all products
    tax: 45.00,                         // tax
    shipping: 10.00,                    // shipping costs
    affiliation: 'Nitro PC',        // affiliation (e.g. affiliate id, name of the store, etc.)
    transaction_id: '12384',            // transaction id
    coupon: 'pcGaming_10%off',          // if coupon was applied to the order, include it here
   items: [{                           // an array where all currently viewed products must be included
      item_name: 'Avanzado S Bronze',           // insert an actual product name
      item_id: 'SBronze123',                // insert an actual product ID
      price: '545.00',                  // insert an actual product price. Number or a string. Don't include currency code
      item_brand: 'Nitro PC',           // insert an actual product brand
      item_category: 'PC Gaming',           // insert an actual product top-level category
      item_category2: 'Avanzado S',     // if it is possible to drill down the categories (e.g. Apparel, then T-shirt, then Men), use item_category2, item_category3, etc. Can use from item_category up to item_category5
      item_variant: 'Gaming',               // insert an actual product variant. (Color, style, etc)
      quantity: '1'                     // product quantity. In case of view_item_list, it will usually be equal to 1
  }
});