<form method="POST" id="paypal_checkout_form">
  <input type="hidden" name="action" value="commerce/payments/pay"/>
  <input type="hidden" name="redirect" value="/thank-you?oid={{ cart.number }}"/>
  <input type="hidden" name="cancelUrl" value="/shop/cancel"/>
  <input type="hidden" name="orderNumber" value="{{ cart.number }}"/>

  {{ getCsrfInput() }}
</form>