Method use

integration/hello-world/e2e/middleware-fastify.spec.ts:30–40

(
        req: FastifyRequest['raw'] & { headers: Record<string, unknown> },
        res,
        next: () => void,
      )

    @Injectable()
    class AuthMiddleware implements NestMiddleware {
      use(
        req: FastifyRequest['raw'] & { headers: Record<string, unknown> },
        res,
        next: () => void,
      ) {
        if (req.headers['x-auth'] === '1') {
          return next();
        }
        res.statusCode = 401;
        res.end('unauthorized');
      }
    }

    @Controller('users')