@nestjs/common/interfaces/middleware/nest-middleware.interface.d.ts

/**
 * @see [Middleware](https://docs.nestjs.com/middleware)
 *
 * @publicApi
 */
export interface NestMiddleware<TRequest = any, TResponse = any> {
    use(req: TRequest, res: TResponse, next: (error?: Error | any) => void): any;
}