# Function: deriveContactKeyBytes()

```ts
function deriveContactKeyBytes(seed): Promise<Uint8Array<ArrayBufferLike>>;
```

Defined in: [packages/core/src/identity/contact-key.ts:62](https://github.com/leifriksheim/minca/blob/main/core/src/identity/contact-key.ts#L62)

The contact key's 32-byte private scalar, from the seed: what an account home hands an app that handles contacts

## Parameters

| Parameter | Type |
| ------ | ------ |
| `seed` | `Uint8Array` |

## Returns

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