import { type TRet } from '@noble/hashes/utils.js';
/** SLIP-0010 master secret label for ed25519 keys. */
export declare const MASTER_SECRET: TRet<Uint8Array>;
/** Hardened child index offset. */
export declare const HARDENED_OFFSET: number;
interface HDKeyOpt {
    depth?: number;
    index?: number;
    parentFingerprint?: number;
    chainCode: Uint8Array;
    privateKey: Uint8Array;
}
/**
 * HD key for ed25519, SLIP-0010 format.
 * This surface is the ed25519 private-only, hardened-only subset of SLIP-0010,
 * not a full BIP-0032 xpub/xprv implementation.
 * @param opt - Internal {@link HDKeyOpt} constructor options for derived keys:
 * depth, child index, parent fingerprint, chain code, and private key.
 * @example
 * Start from a master seed, derive the hardened child path you need, then
 * recreate the child from stored private key material and chain code.
 * ```ts
 * import { randomBytes } from '@noble/hashes/utils.js';
 * import { HDKey } from 'micro-key-producer/slip10.js';
 * const seed = randomBytes(32);
 * const child = HDKey.fromMasterSeed(seed).derive("m/0'");
 * const restored = new HDKey({
 *   privateKey: child.privateKey,
 *   chainCode: child.chainCode,
 * });
 * restored.fingerprintHex;
 * ```
 */
export declare class HDKey {
    get publicKeyRaw(): Uint8Array;
    get publicKey(): Uint8Array;
    get pubHash(): Uint8Array;
    get fingerprint(): number;
    get fingerprintHex(): string;
    get parentFingerprintHex(): string;
    static fromMasterSeed(seed: Uint8Array): HDKey;
    readonly depth: number;
    readonly index: number;
    readonly chainCode: Uint8Array;
    readonly parentFingerprint: number;
    readonly privateKey: Uint8Array;
    constructor(opt: HDKeyOpt);
    derive(path: string, forceHardened?: boolean): HDKey;
    deriveChild(index: number): HDKey;
    sign(message: Uint8Array): Uint8Array;
    verify(message: Uint8Array, signature: Uint8Array): boolean;
}
export default HDKey;