/// <reference types="node" />
import { IDiscloseDemandCertificationPayload, IDiscloseDemandPayload } from "../";
declare class UnsCrypto {
    signPayload(payload: any, passphrase: string): string;
    getPayloadHashBuffer(payload: IDiscloseDemandPayload | IDiscloseDemandCertificationPayload): Buffer;
    /**
     * Verify payload signature.
     */
    verifyPayload(payload: any | IDiscloseDemandPayload | IDiscloseDemandCertificationPayload, signature: Buffer | string, publicKey: string): boolean;
    /**
     * Return false if the issuer is not allowed to
     */
    verifyIssuerCredentials(issuerId: string): boolean;
    serializeDiscloseDemand(payload: IDiscloseDemandPayload | IDiscloseDemandCertificationPayload): Buffer;
}
export declare const unsCrypto: UnsCrypto;
export {};