Drupal 8 Commerce 2 Twig template for rendering order as an CZ/EU invoice. This is rendered to PDF by entity_print then. Also includes "QR Faktura" - Czech standardized QR code format for invoices and bank transfers.

commerce-order--pdf.html.twig

{#
/**
 * @file
 * Template for orders in the 'user' view mode.
 *
 * Available variables:
 * - attributes: HTML attributes for the wrapper.
 * - order: The rendered order fields.
 *   Use 'order' to print them all, or print a subset such as
 *   'order.order_number'. Use the following code to exclude the
 *   printing of a given field:
 *   @code
 *   {{ order|without('order_number') }}
 *   @endcode
 * - order_entity: The order entity.
 *
 * @ingroup themeable
 */
#}

<h1>Faktura {{ order.order_number[0] }}</h1>

<div style="margin: 2em 0 0 0">
  <style>
    h2 {
      font-size: 1.1em;
    }

    p.address {
      margin: 0;
    }

    .field--label-inline > * {
      display: inline;
    }

    .field--label-inline .field__label:after {
      content: ":";
    }
  </style>
  <div style="float: left; width: 50%">
    <h2>Dodavatel</h2>
    {{ order.store_id[0] }}
  </div>

  <div style="float: left">
    <h2>Odběratel</h2>
    {{ order.billing_information }}
  </div>
</div>
<div style="clear: both; padding-top: 1em"></div>

{% set store = order.store_id[0]['#commerce_store'] %}

Datum vystavení a splatnosti: {{ order_entity.getCreatedTime() | format_date('custom', 'j. n. Y') }}<br>
Číslo účtu: {{ store.field_bankaccount.getString() }}<br>
Variabilní symbol: {{ order.order_number[0] }}

<style>
  table {
    margin-top: 1em;
    width: 100%;
  }

  .field--name-total-price,
  .views-field-unit-price__number,
  .views-field-quantity,
  .views-field-total-price__number {
    text-align: right;
  }
</style>
{{ order.order_items }}
{{ order.total_price }}


<img src="https://api.qrfgen.cz/generator/image?ID={{ order.order_number[0] -}}
&AM={{ order.total_price[0]['#totals']['total'].getNumber() -}}
&CC={{ order.total_price[0]['#totals']['total'].getCurrencyCode() -}}
&DD={{ order_entity.getCreatedTime() | format_date('custom', 'Ymd') -}}
&DT={{ order_entity.getCreatedTime() | format_date('custom', 'Ymd') -}}
&VS={{ order.order_number[0] -}}
&ACC={{ store.field_iban.getString() -}}
&INI={{ store.field_ico.getString() -}}
&INR={{ order.billing_information['#profile'].field_ico.getString() -}}
&ks=9&qrplatba=1" style="margin-top: 2em">