# Function: purgeMessage()

```ts
function purgeMessage(
   topic, 
   nonce, 
   ids
): Uint8Array<ArrayBuffer>;
```

Defined in: [packages/core/src/inbox/inbox.ts:196](https://github.com/leifriksheim/minca/blob/main/core/src/inbox/inbox.ts#L196)

What an inbox's owner signs to clear knocks from a relay's mailbox: the
topic, the relay's one-time challenge, and which knocks (`*` for all).

## Parameters

| Parameter | Type |
| ------ | ------ |
| `topic` | `string` |
| `nonce` | `string` |
| `ids` | readonly `string`[] \| `null` |

## Returns

`Uint8Array`\<`ArrayBuffer`\>