fix: route constraints (#5207)

* fix: route constraints

* test: update

* chore: linting

test/types/route.test-d.ts

@@ -444,19 +444,12 @@ expectType<boolean>(fastify().hasRoute({
   url: '/',
   method: 'GET',
   constraints: {
-    something: {
-      name: 'secret',
-      storage: function () {
-        return {
-          get: (type) => {
-            return null
-          },
-          set: (type, store) => {}
-        }
-      },
-      deriveConstraint: (req, ctx, done) => {},
-      mustMatchWhenDerived: true
-    }
+    // constraints value should accept any value
+    number: 12,
+    date: new Date(),
+    boolean: true,
+    function: () => {},
+    object: { foo: 'bar' }
   }
 }))
 

types/route.d.ts

@@ -1,4 +1,5 @@
 import { FastifyError } from '@fastify/error'
+import { ConstraintStrategy } from 'find-my-way'
 import { FastifyRequestContext } from './context'
 import { onErrorMetaHookHandler, onRequestAbortMetaHookHandler, onRequestMetaHookHandler, onResponseMetaHookHandler, onSendMetaHookHandler, onTimeoutMetaHookHandler, preHandlerMetaHookHandler, preParsingMetaHookHandler, preSerializationMetaHookHandler, preValidationMetaHookHandler } from './hooks'
 import { FastifyInstance } from './instance'
@@ -12,7 +13,6 @@ import {
   ResolveFastifyReplyReturnType
 } from './type-provider'
 import { ContextConfigDefault, HTTPMethods, RawReplyDefaultExpression, RawRequestDefaultExpression, RawServerBase, RawServerDefault } from './utils'
-import { ConstraintStrategy } from 'find-my-way'
 
 export interface FastifyRouteConfig {
   url: string;
@@ -25,6 +25,12 @@ export type RouteConstraintType = Omit<ConstraintStrategy<any>, 'deriveConstrain
   deriveConstraint<Context>(req: RawRequestDefaultExpression<RawServerDefault>, ctx?: Context, done?: (err: Error, ...args: any) => any): any,
 }
 
+export interface RouteConstraint {
+  version?: string
+  host?: RegExp | string
+  [name: string]: unknown
+}
+
 /**
  * Route shorthand options for the various shorthand methods
  */
@@ -48,7 +54,7 @@ export interface RouteShorthandOptions<
   logLevel?: LogLevel;
   config?: Omit<FastifyRequestContext<ContextConfig>['config'], 'url' | 'method'>;
   version?: string;
-  constraints?: { version: string } | {host: RegExp | string} | {[name: string]: RouteConstraintType },
+  constraints?: RouteConstraint,
   prefixTrailingSlash?: 'slash'|'no-slash'|'both';
   errorHandler?: (
     this: FastifyInstance<RawServer, RawRequest, RawReply, Logger, TypeProvider>,