/// <reference types="node" />
import Bip32PublicKey from "./Bip32PublicKey";
import PrivateKey from "./PrivateKey";
export default class Bip32PrivateKey {
    protected xprv: Buffer;
    constructor(xprv: Buffer);
    static fromEntropy(entropy: Buffer): Promise<Bip32PrivateKey>;
    derive(index: number): Bip32PrivateKey;
    deriveHardened(index: number): Bip32PrivateKey;
    derivePath(path: string): Bip32PrivateKey;
    toBip32PublicKey(): Bip32PublicKey;
    toBytes(): Buffer;
    toPrivateKey(): PrivateKey;
}