Bad Zipcodes Raise Exceptions in Checkout

[brchristian]

Currently if a user has Solidus::TaxCloud installed and checks out with a bad zip code - namely a zip code that does not exist in that US state, for instance 19130 in Rhode Island - the checkout flow will fail with an exception.

Ideally we should simply halt the checkout at the current step and display a error message attached to the form.

Is there a best practice for how to rescue TaxCloud::Errors::ApiError and return its error message attached to the address input form?

I know that in ActiveMerchant there is a pattern like

rescue Stripe::CardError => error
  payment.send(:gateway_error, error.message)
end

Is is possible to do something similar here but with the billing and shipping address step, rather than the payment step?