route-with-codec.ts

 const route = createRoute({
  url: '/api/metrics/:type',
  method: 'GET',
  params: {
    path: t.type({
      type: t.string
    }),
    query: t.type({
      start: t.string,
      end: t.string
    })
  },
  handler: ( request ) => {
    const { type } = request.params;
    const { start, end } = request.query;
    
    return getMetrics({ type, start, end });
  }
});

server.route(route);