store

type Store interface {
	Init() error

	// state
	GetState(ref string) (state map[string]interface{}, encrypted bool, err error)
	PutState(ref string, state, metadata map[string]interface{}, encrypted bool) error
	DeleteState(ref string) error

	// lock
	GetLock(ref string) (lock *types.Lock, err error)
	PutLock(ref string, lock types.Lock) error
	DeleteLock(ref string) error
}