// PVKey stores the immutable part of PrivValidator
type PVKey struct {
	Address types.Address  `json:"address"`
	PubKey  crypto.PubKey  `json:"pub_key"`
	PrivKey crypto.PrivKey `json:"priv_key"`

	filePath string
	mtx      sync.Mutex
}

// PVState stores the mutable part of PrivValidator
type PVState struct {
	LastHeight    int64        `json:"last_height"`
	LastRound     int          `json:"last_round"`
	LastStep      int8         `json:"last_step"`
	LastSignature []byte       `json:"last_signature,omitempty"`
	LastSignBytes cmn.HexBytes `json:"last_signbytes,omitempty"`

	filePath string
	mtx      sync.Mutex
}

type FilePV struct {
	Key   PVKey
	State PVState
}