# Function: fingerprintOf()

```ts
function fingerprintOf(s): Promise<Uint8Array<ArrayBufferLike>>;
```

Defined in: [packages/core/src/sync/negentropy.ts:161](https://github.com/leifriksheim/minca/blob/main/core/src/sync/negentropy.ts#L161)

Hashes a sum the one way both sides do: 32 little-endian bytes, then the count as a varint

## Parameters

| Parameter | Type |
| ------ | ------ |
| `s` | [`Sum`](https://minca.dev/api/core/interfaces/Sum.md) |

## Returns

`Promise`\<`Uint8Array`\<`ArrayBufferLike`\>\>