cardano::bip32_ed25519::PublicKey class

Represent a BIP32-Ed25519 prublic key.

The BIP32-Ed25519 public key is the same as a regular Ed25519 public key only it contains a chain code for non-hardened key derivation.

Constructors, destructors, conversion operators

PublicKey() protected defaulted
PublicKey(std::span<const uint8_t, XPUBLIC_KEY_SIZE> pub) explicit: Construct a key object from a span of key bytes.
PublicKey(std::span<const uint8_t, PUBLIC_KEY_SIZE> pub, std::span<const uint8_t, CHAIN_CODE_SIZE> cc): Construct a key object from bytes.

auto bytes() const → const PubKeyByteArray& constexpr: Return a constant reference to the public key byte array.
auto deriveChild(const uint32_t index, const DerivationMode derivation_mode = DerivationMode::V2) const → PublicKey: Derive a child (non-hardened) key from the public key.
auto verifySignature(std::span<const uint8_t> msg, std::span<const uint8_t, SIGNATURE_SIZE> sig) const → bool: Verify a signature using the public key.
auto xbytes() const → ByteArray<XPUBLIC_KEY_SIZE>: Return a byte array containing both the key and chain code.

Make the default constructor protected so that it can only be used internally. The key will be all zeros.

Construct a key object from a span of key bytes.

Parameters
pub	A span of bytes containing the public key and chain code that will be copied into the object.

Construct a key object from bytes.

Parameters
pub	The public key as a span of bytes.
cc	The chain code as a span of bytes.

Derive a child (non-hardened) key from the public key.

Parameters
index	Non-hardened BIP32 derivation index.
derivation_mode	V1 - Byron, V2 - Shelley

Verify a signature using the public key.

Parameters
msg	A span of bytes (uint8_t) representing the original message.
sig	A span of 64 bytes (uint8_t) representing the signature.