/**
 * Get a bigint from a two's complement encoded buffer or hexadecimal string.
 *
 * @param buffer The buffer to get the number for.
 * @return The parsed number.
 */
export declare const fromTwosComplement: (buffer: string | Uint8Array) => bigint;
/**
 * Get a two's complement encoded buffer from a bigint.
 *
 * @param value The number to get the buffer for.
 * @param length The number of bytes to pad the buffer to.
 * @return The two's complement encoded buffer.
 */
export declare const toTwosComplement: (value: bigint, length: number) => Uint8Array;