import type BN from 'bn.js';
/**
 * encodeNumber
 * Takes a decimal string, hex string, regular number, or BN instance and returns a hex string in the specified format.
 * Typically these conversions are done in web3, but until web3 adds direct support, this is necessary for normalizing
 * numbers eth_signTypedData payloads.
 * @param num The value to convert
 * @param type The solidity ABI type to format the data as (eg. uint256, int8, etc). Only supports int and uint variants.
 * @param compact boolean (default false). Whether to use compact encoding for uints, or pad with zeroes.
 * @returns {string} A hex string formatted as the specified type.
 */
export declare function encodeNumber(num: string | number | BN, type: string, compact?: boolean): string;
export declare const toHex: (num: number) => string;