# RouterProxyCallback

**Kind:** Type

**Source:** [`packages/core/router/router-proxy.ts`](https://github.com/nestjs/nest/blob/master/packages/core/router/router-proxy.ts#L4)

**Part of:** [Core](subsystem-packages-core)

## Definition

```ts
<TRequest, TResponse>( req: TRequest, res: TResponse, next: () => void, ) => void | Promise<void>
```