Struct ExtendedKey 

pub struct ExtendedKey { /* private fields */ }

A BIP32 extended key (private or public) with chain code and derivation metadata.

Supports key derivation, serialization to/from Base58Check xprv/xpub strings, and conversion between private and public extended keys.

Implementations

impl ExtendedKey

pub fn from_seed(seed: &[u8]) -> Result<Self, CompatError>

Derive a master extended key from a seed.

Uses HMAC-SHA512 with key “Bitcoin seed” per BIP32 specification. Seed must be between 16 and 64 bytes (128-512 bits).

pub fn derive(&self, path: &str) -> Result<Self, CompatError>

Derive a child extended key by path string.

Path format: “m/0’/1/2’” where apostrophe or “h” suffix means hardened. Leading “m/” or “m” prefix is stripped.

pub fn derive_child(&self, index: u32) -> Result<Self, CompatError>

Derive a single child key by index.

Index >= 0x80000000 is hardened derivation (requires private key). Index < 0x80000000 is normal derivation (works with public key).

pub fn to_public(&self) -> Result<Self, CompatError>

Convert a private extended key to its public counterpart.

Returns a new ExtendedKey with the public key and xpub version bytes.

pub fn to_base58(&self) -> String

Serialize to a Base58Check string (xprv or xpub).

78-byte payload: version(4) || depth(1) || fingerprint(4) || child_index(4) || chain_code(32) || key(33, with 0x00 prefix for private).

pub fn from_string(s: &str) -> Result<Self, CompatError>

Parse an extended key from a Base58Check string (xprv or xpub).

pub fn public_key(&self) -> Result<PublicKey, CompatError>

Get the public key for this extended key.

If private, derives the public key. If public, parses the stored key.

pub fn is_private(&self) -> bool

Whether this is a private extended key.

pub fn depth(&self) -> u8

Get the derivation depth.

Trait Implementations

impl Clone for ExtendedKey

fn clone(&self) -> ExtendedKey

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ExtendedKey

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for ExtendedKey

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.