/// <reference types="node" />
/**
 * Convert a little-endian buffer into a BigInt.
 * @param buf - The little-endian buffer to convert.
 * @returns A BigInt with the little-endian representation of buf.
 */
export declare function toBigIntLE(buf: Buffer): bigint;
/**
 * Convert a big-endian buffer into a BigInt.
 * @param buf - The big-endian buffer to convert.
 * @returns A BigInt with the big-endian representation of buf.
 */
export declare function toBigIntBE(buf: Buffer): bigint;
/**
 * Convert a BigInt to a little-endian buffer.
 * @param num - The BigInt to convert.
 * @param width - The number of bytes that the resulting buffer should be.
 * @returns A little-endian buffer representation of num.
 */
export declare function toBufferLE(num: bigint, width: number): Buffer;
/**
 * Convert a BigInt to a big-endian buffer.
 * @param num - The BigInt to convert.
 * @param width - The number of bytes that the resulting buffer should be.
 * @returns A big-endian buffer representation of num.
 */
export declare function toBufferBE(num: bigint, width: number): Buffer;
/**
 * Converts a BigInt to its hex representation.
 * @param num - The BigInt to convert.
 * @param padTo32 - Whether to pad the resulting string to 32 bytes.
 * @returns An even-length 0x-prefixed string.
 */
export declare function toHex(num: bigint, padTo32?: boolean): string;
/**
 * Converts a hex string to a buffer. Throws if input is not a valid hex string.
 * @param value - The hex string to convert. May be 0x prefixed or not.
 * @returns A buffer.
 */
export declare function fromHex(value: string): Buffer;