Prerequisites

• I have written a descriptive issue title
• I have searched existing issues to ensure the bug has not already been reported

Fastify version

4.x.x

Plugin version

No response

Node.js version

20.x

Operating system

Linux

Operating system version (i.e. 20.04, 11.3, 10)

Ubuntu 22.04

Description

FastifyRequest.routeSchema might be undefined, for example if route does not exists. The type currently can't be trusted if you would try to access the schema within any hook.

I think the type here should be marked as optional

and same goes for schema in route options

Steps to Reproduce

Set up fastify with a hook like onRequest and observe schema while calling a route that has no been defined.

Expected Behavior

The type should correctly reflect runtime behavior