> ## Documentation Index
> Fetch the complete documentation index at: https://baileys.wiki/llms.txt
> Use this file to discover all available pages before exploring further.

# IMessageKey

> Protobuf interface IMessageKey generated from WAProto.

Defined in: [WAProto/index.d.ts:10958](https://github.com/WhiskeySockets/Baileys/blob/master/WAProto/index.d.ts#L10958)

## Properties

### cipherKey?

> `optional` **cipherKey**: `null` | `Uint8Array`\<`ArrayBufferLike`>

Defined in: [WAProto/index.d.ts:10960](https://github.com/WhiskeySockets/Baileys/blob/master/WAProto/index.d.ts#L10960)

***

### index?

> `optional` **index**: `null` | `number`

Defined in: [WAProto/index.d.ts:10959](https://github.com/WhiskeySockets/Baileys/blob/master/WAProto/index.d.ts#L10959)

***

### iv?

> `optional` **iv**: `null` | `Uint8Array`\<`ArrayBufferLike`>

Defined in: [WAProto/index.d.ts:10962](https://github.com/WhiskeySockets/Baileys/blob/master/WAProto/index.d.ts#L10962)

***

### macKey?

> `optional` **macKey**: `null` | `Uint8Array`\<`ArrayBufferLike`>

Defined in: [WAProto/index.d.ts:10961](https://github.com/WhiskeySockets/Baileys/blob/master/WAProto/index.d.ts#L10961)