---
title: "A bounded context should keep its internal details private"
source: "https://virtualddd.com/heuristics/a-bounded-context-should-keep-its-internal-details-private/"
authors: ["Mathias Verraes"]
tags: ["bounded context", "distributed systems", "coupling"]
type: "design heuristics"
question: "How can we lower coupling from between bounded contexts or systems"
submitter: "Kenny Schwegler"
---

# A bounded context should keep its internal details private

If you are keeping monetary units in say 10 digits internally in a service, you would only pass out an amount in 2 digits precision because that’s all other consumers of the event would need