export declare class BigintConverter {
    /**
     * Convert bytes to unsigned long
     * @param {Uint8Array} data byte array
     * @param {Number} offset read offset
     * @param {Number} length read length
     * @returns {bigint} long value
     */
    static decode(data: Uint8Array, offset?: number, length?: number): bigint;
    /**
     * Convert long to byte array
     * @param {bigint} value long value
     * @returns {Uint8Array} Array byte array
     */
    static encode(value: bigint): Uint8Array;
}