Function fetchNonce

fetchNonce(
__namedParameters: FetchNonceParams,
config: FetchNonceConfig,
): Promise<{ c_nonce: string; c_nonce_expires_in: number }>
Fetches a c_nonce value for proof freshness before credential issuance.

Why (Security)
Nonce usage mitigates replay of holder proofs.

Specifications
- OpenID4VCI, nonce endpoint and c_nonce
- OpenID4VCI, proof freshness requirements
- RFC 9449 (OAuth 2.0 Demonstrating Proof-of-Possession at the Application Layer (DPoP)), request binding for DPoP-protected calls
Parameters
- __namedParameters: FetchNonceParams
- config: FetchNonceConfig
Returns Promise<{ c_nonce: string; c_nonce_expires_in: number }>
- Defined in packages/client-core/src/statements/tokens/fetchNonce.ts:25