/// <reference types="node" />
import { Buffer } from 'buffer';
export declare type Input = Buffer | string | number | bigint | Input[];
/**
 * Encode the input using RLP. The input can be an array, or individual item.
 *
 * @param {Input} input
 * @return {Buffer}
 */
export declare const rlpEncode: (input: Input) => Buffer;
/**
 * Get a number as hexadecimal string, padded with extra zero if necessary.
 *
 * @param {number | bigint} n
 * @return {string}
 */
export declare const numberToHex: (n: number | bigint) => string;
/**
 * Encode the length as a Buffer.
 *
 * @param {number} length
 * @param {number} offset
 * @return {Buffer}
 */
export declare const rlpEncodeLength: (length: number, offset: number) => Buffer;
/**
 * Parse the input to a Buffer.
 *
 * @param {Input} input
 * @return {Buffer}
 */
export declare const rlpParseInput: (input: Input) => Buffer;
/**
 * Parse a number to a Buffer.
 *
 * @param {number | bigint} n
 * @return {Buffer}
 */
export declare const rlpNumberToBuffer: (n: number | bigint) => Buffer;