/**
 *
 *
 * @class ChallengeResponse
 */
export declare class ChallengeResponse {
    /**
     *
     * Creates a RelayMeta object using a JSON string
     * @param {string} json - JSON string.
     * @returns {ChallengeResponse} - ChallengeResponse object.
     * @memberof ChallengeResponse
     */
    static fromJSON(json: string): ChallengeResponse;
    readonly response: string;
    /**
     * Challenge Response.
     * @constructor
     * @param {string} response - response json.
     */
    constructor(response: string);
    /**
     *
     * Creates a JSON object with the ChallengeResponse properties
     * @returns {JSON} - JSON Object.
     * @memberof ChallengeResponse
     */
    toJSON(): {
        response: string;
    };
    /**
     *
     * Check if the ChallengeResponse object is valid
     * @returns {boolean} - True or false.
     * @memberof ChallengeResponse
     */
    isValid(): boolean;
}