pub fn sign(key: &SigningKey, payload: &[u8]) -> StringExpand description
Signs a JSON payload with an Ed25519 private key. Returns standard base64-encoded signature (matches Python’s base64.b64encode()).
pub fn sign(key: &SigningKey, payload: &[u8]) -> StringSigns a JSON payload with an Ed25519 private key. Returns standard base64-encoded signature (matches Python’s base64.b64encode()).