Treedify

Add the following code below the <div id="storePickupApp"></div>  line of your shopping cart template. 

<input type="hidden" id="checkoutAddress1" name="checkout[shipping_address][address1]" value="" />
<input type="hidden" id="checkoutAddress2" name="checkout[shipping_address][address2]" value="" />
<input type="hidden" id="checkoutCity" name="checkout[shipping_address][city]" value="" />
<input type="hidden" id="checkoutZip" name="checkout[shipping_address][zip]" value="" />
<input type="hidden" id="checkoutCountry" name="checkout[shipping_address][country]" value="" /><input type="hidden" id="locale" name="locale" value="" />

Enter the following in your storepickup-addons.liquid file:

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.4.1/jquery.min.js" integrity="sha256-CSXorXvZcTkaix6Yvo6HppcZGetbYMGWSFlBw8HfCJo=" crossorigin="anonymous"></script>
<script type="text/javascript">
$(document).ready(function() {
  window.ZapietEvent.listen('activateCheckout', function(params) {   
    if (params.method == 'pickup') {
      $("#checkoutAddress1").val(params.location.address_line_1);
      $("#checkoutAddress2").val(params.location.address_line_2);
      $("#checkoutCity").val(params.location.city);
      $("#checkoutZip").val(params.location.postal_code);
      $("#checkoutCountry").val(params.location.country);
      $("#locale").val('en-CA');
    } else {
      $("#locale").val('en');
      $("#checkoutAddress1").val('');
      $("#checkoutAddress2").val('');
      $("#checkoutCity").val('');
      $("#checkoutZip").val('');
    }
  });
});
</script>