# Function: inboxAuthor()

```ts
function inboxAuthor(sign): string;
```

Defined in: [packages/core/src/inbox/inbox.ts:115](https://github.com/leifriksheim/minca/blob/main/core/src/inbox/inbox.ts#L115)

The did:key of an inbox's signing key: who an inbox is signed by

## Parameters

| Parameter | Type |
| ------ | ------ |
| `sign` | `string` |

## Returns

`string`