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

# hkdfInfoKey

> Function hkdfInfoKey in the Baileys API.

> **hkdfInfoKey**(`type`): `string`

Defined in: [src/Utils/messages-media.ts:49](https://github.com/WhiskeySockets/Baileys/blob/master/src/Utils/messages-media.ts#L49)

## Parameters

### type

`"ppic"` | `"product"` | `"image"` | `"video"` | `"sticker"` | `"thumbnail-document"` | `"audio"` | `"thumbnail-image"` | `"biz-cover-photo"` | `"thumbnail-video"` | `"thumbnail-link"` | `"gif"` | `"md-app-state"` | `"md-msg-hist"` | `"document"` | `"ptt"` | `"product-catalog-image"` | `"payment-bg-image"` | `"ptv"`

## Returns

`string`