Message Center Conditional Formatting - Campaign V8

Hello,

Is it possible to use conditional HTML formatting in a Transactional Email Template based off of an RT event value?

I've been testing with something basic like this:

<% if ( <%= rtEvent.ctx.email.@type %> == 'Order' ) { %>Your Order is en route<% } %><% else { %>Your Order is delayed<% } %>

I'm testing based on proofs with a seed address that has the following two CTX values: 

<ctx>
<email location="somewhere" type="Order"/>
</ctx>

When I analyze a proof to send, it shows an error around htmlContent -- so I'm wondering if this is just not available functionality in message center. But maybe (hopefully), I'm just doing something wrong.

What do you think?

Thanks!