pub fn threshold_sign_cert(
tbs: &[u8],
commitments_map: BTreeMap<Identifier, SigningCommitments>,
signers: Vec<(Identifier, &KeyPackage, SigningNonces)>,
pubkey_package: &PublicKeyPackage,
) -> Result<[u8; 64], ThresholdError>Expand description
Executes threshold signing over a canonical message buffer using the provided signers. Returns a standard 64-byte Ed25519 signature.