# Function: sealKnock()

```ts
function sealKnock(
   to, 
   knock, 
   signer, 
   provider
): Promise<string>;
```

Defined in: [packages/core/src/inbox/inbox.ts:220](https://github.com/leifriksheim/minca/blob/main/core/src/inbox/inbox.ts#L220)

Makes a knock: signed by the session key under its account's note, and
sealed to `to`, an inbox key or a contact key.

## Parameters

| Parameter | Type |
| ------ | ------ |
| `to` | `string` |
| `knock` | \{ `invite`: [`Version`](https://minca.dev/api/core/interfaces/Version.md); `name`: `string`; `note?`: `string`; `secret`: `Uint8Array`; \} |
| `knock.invite` | [`Version`](https://minca.dev/api/core/interfaces/Version.md) |
| `knock.name` | `string` |
| `knock.note?` | `string` |
| `knock.secret` | `Uint8Array` |
| `signer` | `LooseSigner` |
| `provider` | [`CryptoProvider`](https://minca.dev/api/core/interfaces/CryptoProvider.md) |

## Returns

`Promise`\<`string`\>

The sealed blob, for a mailbox or a contact request