kv

type Batch interface {
	Putter

	Len() int
	Write() error
}

type GetPutCloser interface {
	GetPutter
	Close() error
}

type GetPutter interface {
	Getter
	Putter
}

type Getter interface {
	// Get value for given key.
	// An error returned if key not found. It can be checked via IsNotFound.
	Get(key []byte) (value []byte, err error)
	Has(key []byte) (bool, error)
	IsNotFound(error) bool

	NewIterator(r Range) Iterator
}

type Iterator interface {
	Next() bool
	Release()
	Error() error

	Key() []byte
	Value() []byte
}

type Putter interface {
	Put(key, value []byte) error
	Delete(key []byte) error

	NewBatch() Batch
}

type Range struct {
	From []byte
	To   []byte
}