GA4 - purchase

window.dataLayer = window.dataLayer || [];
window.dataLayer.push({
  event: 'purchase',
  ecommerce: {
    currency: 'RSD',                            //Required. Transaction Currency - Type: Numeric
    value: 10920,                               //Transaction Revenue  - Type: Numeric
    tax: 7.18,                                  //Transaction Tax - Type: Numeric
    shipping: 10.00,                            //Transaction Shipping - Type: Numeric
    affiliation: 'My Parka Store',              //Optional. Transaction Affiliation -  - Type: string
    transaction_id: 'p115-20202000',            //Required. Transaction ID - Type: String
    coupon: '20%off',                   //Coupon Code of applicable - Type: String
    items: [{
      item_name: 'Product 1',                    //Product Name - Type: string
      item_id: 'mp1122',                        //Product ID/SKU - Type: string
      price: '31.10',                           //Product price - Type: numeric
      item_brand: 'product brand',              //Product Brand- Type: string
      item_category: 'Apparel',                 //Product Category - Type: string
      item_category2: 'Coats',                  //Product Sub-Category 1 - Type: string
      item_category3: 'Wool',                   //Product Sub-Category 2 - Type: string
      item_category4: 'Unisex',                 //Product Sub-Category 3 - Type: string
      item_category5: 'cat5',                 //Product Sub-Category 4 - Type: string
      item_variant: 'Navy blue',                //Variant of other product like size, color et c - Type: string
      quantity: '3'                             //Product quantity - Type: integer
    },{
      item_name: 'stain removal',
      item_id: 'psr1332',
      price: '5.99',
      item_brand: 'product brand',
      item_category: 'Apparel',
      item_category2: 'Utility',
      item_category3: 'Care product',
      item_category4: 'Unisex',
      item_category5:'cat5',
      quantity: '1'
    }]
  }
});