Struct ExtendedPublicKey 

pub struct ExtendedPublicKey { /* private fields */ }

A BIP-32 extended public key for watch-only wallets.

Supports normal (non-hardened) child derivation only. Hardened derivation requires the private key.

Implementations

impl ExtendedPublicKey

pub fn public_key_bytes(&self) -> &[u8; 33]

Get the compressed public key (33 bytes).

pub fn depth(&self) -> u8

Get the derivation depth.

pub fn chain_code(&self) -> &[u8; 32]

Get the chain code.

pub fn parent_fingerprint(&self) -> &[u8; 4]

Get the parent fingerprint.

pub fn child_index(&self) -> u32

Get the child index.

pub fn derive_child_normal(&self, index: u32) -> Result<Self, SignerError>

Derive a normal (non-hardened) child public key.

Only normal derivation (index < 2^31) is supported. Hardened derivation requires the private key.

pub fn to_xpub(&self) -> String

Serialize as an xpub Base58Check string.

pub fn from_xpub(xpub: &str) -> Result<Self, SignerError>

Deserialize an xpub Base58Check string.

pub fn p2wpkh_address(&self, hrp: &str) -> Result<String, SignerError>

Derive a P2WPKH (SegWit) address from this public key.

Uses Bech32 encoding: bc1q... for mainnet.

Arguments

• hrp — Human-readable part: "bc" for mainnet, "tb" for testnet

pub fn p2tr_address(&self, hrp: &str) -> Result<String, SignerError>

Derive a P2TR (Taproot) address from this public key.

Extracts the x-only public key (drops the prefix byte) and encodes as a Bech32m bc1p... address.

Arguments

• hrp — Human-readable part: "bc" for mainnet, "tb" for testnet

Trait Implementations

impl Clone for ExtendedPublicKey

fn clone(&self) -> ExtendedPublicKey

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ExtendedPublicKey

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

Formats the value using the given formatter.