Purchase

<script>
var dataLayer  = window.dataLayer || [];
dataLayer.push({
  'event': 'transaction',
  'ecommerce': {
    'purchase': {
      'actionField': {
        'id': '2873',
        'revenue': '122.97',
        'tax':'12',
        'shipping': '',
        'coupon': 'sconto dig 2020' //needs to be filled if coupon is used on the entire order
      },
      'products': [{
        'name': 'biglietti da visita',
        'id': '8773',
        'price': 11.99,
        'brand': 'venditore 222',
        'category': 'stampa',
        'quantity': 1,
        'coupon': 'HappyT2122'  //needs to be filled if coupon is used on a single product

       },
       {
        'name': 'logo',
        'id': '2873',
        'price': 11.99,
        'brand': 'venditore 222',
        'category': 'web design',
        'quantity': 2,
        'coupon': ''
       }]
    }
  }
});
</script>