Struct DerivedPrivateKey 

pub struct DerivedPrivateKey { /* private fields */ }

A private key derived via the IC’s derivation mechanism

Due to oddities in Ed25519’s secret key format, a derived private key cannot be treated the same way as an ordinary private key. In particular, it cannot be serialized.

Implementations

impl DerivedPrivateKey

pub fn sign_message(&self, msg: &[u8]) -> [u8; 64]

Sign a message and return a signature

This is the non-prehashed variant of Ed25519

pub fn public_key(&self) -> PublicKey

Return the public key associated with this private key

pub fn derive_subkey( &self, derivation_path: &DerivationPath, ) -> (DerivedPrivateKey, [u8; 32])

Derive a private key from this private key using a derivation path

This is the same derivation system used by the Internet Computer when deriving subkeys for threshold Ed25519

Note that this function returns a DerivedPrivateKey rather than Self, and that DerivedPrivateKey can sign messages but cannot be serialized. This is due to the definition of Ed25519 private keys, which is incompatible with additive derivation.

pub fn derive_subkey_with_chain_code( &self, derivation_path: &DerivationPath, chain_code: &[u8; 32], ) -> (DerivedPrivateKey, [u8; 32])

Derive a private key from this private key using a derivation path and chain code

This is the same derivation system used by the Internet Computer when deriving subkeys for threshold Ed25519

Note that this function returns a DerivedPrivateKey rather than Self, and that DerivedPrivateKey can sign messages but cannot be serialized. This is due to the definition of Ed25519 private keys, which is incompatible with additive derivation.