Struct LogSigningKey 

pub struct LogSigningKey { /* private fields */ }

The log operator’s Ed25519 checkpoint-signing key, parsed and curve-checked at construction so signing can never fail on curve drift. The C2SP signed-note log_signature field is Ed25519-pinned by spec; non-Ed25519 keys are rejected here, once, at the boundary.

Implementations

impl LogSigningKey

pub fn generate() -> Result<Self, TransparencyError>

Generate a fresh Ed25519 signing key from OS randomness.

Usage:

let key = LogSigningKey::generate()?;
std::fs::write(key_path, key.to_pkcs8_der()?)?;

pub fn from_pkcs8_der(der: &[u8]) -> Result<Self, TransparencyError>

Parse a signing key from PKCS#8 DER bytes.

Args:

• der — PKCS#8 DER as previously produced by Self::to_pkcs8_der.

pub fn from_seed(seed: [u8; 32]) -> Result<Self, TransparencyError>

Build a signing key from a raw 32-byte Ed25519 seed.

A witness node uses ONE Ed25519 identity for both its cosignatures and its log checkpoints — verifiers pin a single member key — so the node derives both signers from the same stable seed.

Args:

• seed — The 32-byte Ed25519 seed.

Usage:

let key = LogSigningKey::from_seed(node_seed)?;

pub fn to_pkcs8_der(&self) -> Result<Vec<u8>, TransparencyError>

PKCS#8 DER bytes for persisting the key alongside the log.

pub fn public_key(&self) -> Ed25519PublicKey

The log’s public key — what verifiers pin as the log identity.