Manually Set Craft Commerce Currency

Question

Is it possible to manually set the currency during the checkout process? Right now Im trying the following (set currency to CAD for Canadian buyers), which seems to break the cart array....

{% if cart.shippingAddress.countryId == '38' %}
  {% set cart = cart|merge({'paymentCurrency': 'CAD'}) %}
{% endif %}

Answer 1

According to the documentation, carts are represented by the craft\commerce\elements\Order class. The API documentation is a useful way of finding available methods and properties. In this case, Order::setPaymentCurrency seems to be what you're looking for. So this should work:

{% if cart.shippingAddress.countryId == '38' %}
  {% do cart.setPaymentCurrency('CAD') %}
{% endif %}