Block checkout for restricted ZIP codes

Sometimes hiding a rate isn't enough — regulated goods, quarantine zones, or carrier embargoes mean the order must not happen at all. Drydock's validation rules stop checkout with a message you write, so the customer knows why instead of bouncing confused.

Blocking checkout is the highest-stakes rule there is. That's why you simulate it first and see exactly which addresses trigger it — before a single real customer does.

Test first. Undo after. Always.

Drydock runs every draft rule against a synthetic checkout — real products, any address, any customer — and shows a trace of every condition with the actual values compared. Save good scenarios as test cases and they re-run on every publish, so a rule that changes an outcome gets flagged on the publish screen instead of at your checkout. Every publish is an immutable version with a diff, and restoring a previous version is one click.