sig

type Deserializer interface {
	DeserializeVerifier(raw []byte) (driver.Verifier, error)
	DeserializeSigner(raw []byte) (driver.Signer, error)
	Info(raw []byte, auditInfo []byte) (string, error)
}

type KVS interface {
	Exists(id string) bool
	Put(id string, state interface{}) error
	Get(id string, state interface{}) error
}