# deriveAccessKey

```ts
function deriveAccessKey(signingKey): Promise<Uint8Array<ArrayBufferLike>>;
```

Defined in: packages/asset-client/src/access.ts:74

The per-tenant access key, derived from `signing_key`. Same value the origin
computes and hands the edge — nothing needs to be stored or synchronised.

## Parameters

| Parameter | Type |
| ------ | ------ |
| `signingKey` | `string` |

## Returns

`Promise`\<`Uint8Array`\<[`ArrayBufferLike`](/api/nitida/asset-client/-internal-/type-aliases/arraybufferlike/)\>\>