/**
 * Client for the user-service voucher-source routes (external voucher redemption, #801).
 * Only the internal `resolve` is used by the backend — it returns the source WITH credentials and is
 * gated to the fixed JWT_ADMIN service token. (The public grid is read by the FE directly.)
 */
export declare class VoucherSourceClient {
    /** Fetch a voucher source WITH its decrypted credentials via the internal JWT_ADMIN-only resolve route. */
    resolve(params: {
        jwt: string;
        id: string;
    }): Promise<any>;
}