export declare const SERVERS: string[];
export declare const modHexMap: {
    b: string;
    c: string;
    d: string;
    e: string;
    f: string;
    g: string;
    h: string;
    i: string;
    j: string;
    k: string;
    l: string;
    n: string;
    r: string;
    t: string;
    u: string;
    v: string;
};
export declare const keysUsedInHash: string[];
/**
 * Error messages
 * Source: https://developers.yubico.com/yubikey-val/Validation_Protocol_V2.0.html
 */
export declare const yubicoResErrorMessages: {
    BAD_OTP: string;
    REPLAYED_OTP: string;
    BAD_SIGNATURE: string;
    MISSING_PARAMETER: string;
    NO_SUCH_CLIENT: string;
    OPERATION_NOT_ALLOWED: string;
    BACKEND_ERROR: string;
    NOT_ENOUGH_ANSWERS: string;
    REPLAYED_REQUEST: string;
};