Struct Keypair 

pub struct Keypair { /* private fields */ }

An Ed25519 keypair held in memory. The secret key is [u8; 32] — the 32-byte seed Ed25519 expands into a signing key. We never keep the expanded scalar around; every sign call regenerates it from the seed.

Implementations

impl Keypair

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

Generate a fresh keypair using the OS CSPRNG. Suitable for lex keygen; production callers wanting deterministic keys (test vectors, KAT) should use Keypair::from_secret_hex.

pub fn from_seed(seed: &[u8; 32]) -> Self

Build a keypair from a 32-byte seed. Useful for tests where a known fixture key is needed; production callers should prefer Keypair::generate or the hex-deserialise path.

pub fn from_secret_hex(hex_str: &str) -> Result<Self, SigningError>

Parse a hex-encoded 32-byte secret key (the seed).

pub fn secret_hex(&self) -> String

Lowercase-hex of the 32-byte secret seed. Treat as material — this is what lex keygen prints to stdout exactly once.

pub fn public_hex(&self) -> String

Lowercase-hex of the 32-byte public key. Safe to publish.

pub fn sign_stage_id(&self, stage_id: &str) -> Signature

Sign the UTF-8 bytes of a StageId and return the wire-format Signature record. The same record verifies via verify_stage_id.

Trait Implementations

impl Debug for Keypair

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

Formats the value using the given formatter.