> ## Documentation Index
> Fetch the complete documentation index at: https://litprotocol-feat-rusk-sdk.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# generatePkpDelegationAuthSig

# Function

> **generatePkpDelegationAuthSig**(`params`)

Creates a delegation signature that authorises a session key to act on behalf of a PKP. Use this in server or pre-generation flows where you want to prepare session materials ahead of time.

## Parameters

<ParamField path="params.pkpPublicKey" type="string" required>
  Hex-encoded PKP public key.
</ParamField>

<ParamField path="params.authData" type="AuthData" required>
  Authentication data for the PKP owner (e.g., from `ViemAccountAuthenticator.authenticate`).
</ParamField>

<ParamField path="params.sessionKeyPair" type="SessionKeyPair" required>
  Session keypair generated with `generateSessionKeyPair`.
</ParamField>

<ParamField path="params.authConfig" type="AuthConfigV2" required>
  Configures resources and expiration scoped to the delegation.
</ParamField>

<ParamField path="params.litClient" type="LitClient" required>
  Lit client used to reach the network and request the delegation signature.
</ParamField>

## Returns

<ResponseField name="delegationAuthSig" type="AuthSig">
  Signed delegation that can be shipped alongside the session keypair.
</ResponseField>

## Example

```ts theme={null}
import { generatePkpDelegationAuthSig, generateSessionKeyPair } from '@lit-protocol/auth';

const sessionKeyPair = generateSessionKeyPair();

const delegationAuthSig = await generatePkpDelegationAuthSig({
  pkpPublicKey,
  authData,
  sessionKeyPair,
  authConfig: {
    resources: [ ['pkp-signing', '*'], ['lit-action-execution', '*'] ],
    expiration: new Date(Date.now() + 15 * 60 * 1000).toISOString(),
  },
  litClient,
});
```