# generateDigest

**Kind:** Function

**Source:** [`src/middleware/etag/digest.ts`](https://github.com/honojs/hono/blob/main/src/middleware/etag/digest.ts#L18)

**Part of:** [Middleware](subsystem-src-middleware)

## Signature

```ts
async function generateDigest(stream: ReadableStream<Uint8Array<ArrayBuffer>> | null, generator: (body: Uint8Array<ArrayBuffer>) => ArrayBuffer | Promise<ArrayBuffer>): Promise<string | null>
```

## Parameters

| Name | Type |
|---|---|
| `stream` | `ReadableStream<Uint8Array<ArrayBuffer>> | null` |
| `generator` | `(body: Uint8Array<ArrayBuffer>) => ArrayBuffer | Promise<ArrayBuffer>` |

**Returns:** `Promise<string | null>`

## Used by

1 reference from 1 file. Each is a place in this repository where the symbol is actually used — go read one rather than trusting an example.

### Imported by (1)

- `handler` — `src/middleware/etag/index.ts`:97