export declare class SteamAuthenticator {
    private readonly _DIGITS;
    private readonly _PERIOD;
    private readonly _ALPHABET;
    /**
     * Get the current time in seconds, optionally with a time offset
     * @param timeOffset Time offset in seconds (optional)
     * @returns The current time in seconds `number`
     */
    getTime(timeOffset?: number): number;
    /**
     * Generate a one-time authentication code (TOTP)
     * @param secret The secret key as a string
     * @param timeOffset Time offset in seconds (optional)
     * @returns The generated one-time authentication code `string`
     */
    generateAuthCode(secret: string, timeOffset?: number): string;
    /**
     * Generate a confirmation key for Steam
     * @param identitySecret The secret key for Steam authentication
     * @param time Unix time in seconds
     * @param tag The tag for the key (e.g., 'conf')
     * @returns The confirmation key `string`
     */
    generateConfirmationKey(identitySecret: string, time: number, tag: string): string;
    /**
     * Generate the device ID based on the SteamID
     * @param steamid The user's SteamID
     * @returns The device ID `string`
     */
    getDeviceId(steamid: string): string;
    /**
     * Asynchronously get the time offset from Steam servers
     * @returns An object with the time offset and the request time
     */
    getTimeOffsetAsync(): Promise<{
        offset: number;
        time: number;
    }>;
    /**
     * Get the time offset from Steam servers using a callback
     * @param callback The callback function to return the error or result
     */
    getTimeOffset(callback: (error?: Error, offset?: number, time?: number) => void): void;
    /**
     * Convert the secret string into a format that can be used by CryptoJS
     * @param secret The secret string (in hex or base64)
     * @returns The parsed secret as a CryptoJS `WordArray`
     */
    private bufferizeSecret;
}
export declare const SteamTotp: SteamAuthenticator;