<script>
            // Send transaction data with a pageview if available
            // when the page loads. Otherwise, use an event when the transaction
            // data becomes available.
            dataLayer.push({
                'ecommerce': {
                    'purchase': {
                        'actionField': {
                            'id': '{{ bill.trans_id }}',                         // Transaction ID. Required for purchases and refunds.
                            {#                            'affiliation': 'Online Store',#}
                            'revenue': '{{ order.ttc }}',                     // Total transaction value (incl. tax and shipping)
                            'tax':'{{ vat }}',
                            'shipping': '0',
                            'coupon': ''
                        },
                        'products': [{                            // List of productFieldObjects.
                            'name': '{{ order.offer.name }}',     // Name or ID is required.
                            'id': '{{ order.offer.id }}',
                            'price': '{{ order.ttc }}',
                            'quantity': {{ order.duration }},
                            'coupon': ''                            // Optional fields may be omitted or set to empty string.
                        }]
                    }
                }
            });
        </script>