NestJS · Senior · Question 71 of 75

Why should domain services throw domain errors rather than `HttpException`s?

✓Correct answer: Domain code is reused by HTTP, GraphQL, queues and CLI; mapping domain errors to transport errors at the edge (filters) keeps it independent
2Domain errors are faster
3HttpException can't be thrown from services

Explanation

A UserNotFoundError becomes 404 in HTTP, NOT_FOUND in GraphQL, and a non-retryable failure in a queue.

Further reading

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