# Handler

**Kind:** Type

**Source:** [`src/adapter/aws-lambda/types.ts`](https://github.com/honojs/hono/blob/main/src/adapter/aws-lambda/types.ts#L52)

**Part of:** [Adapter](subsystem-src-adapter)

## Definition

```ts
( event: TEvent, context: LambdaContext, callback: Callback<TResult> ) => void | Promise<TResult>
```