package db0401

type KV struct {
	log  Log
	keys [][]byte
	vals [][]byte
}

func (kv *KV) Open() error

func (kv *KV) Close() error { return kv.log.Close() }

func (kv *KV) Get(key []byte) (val []byte, ok bool, err error)

type UpdateMode int

const (
	ModeUpsert UpdateMode = 0 // insert or update
	ModeInsert UpdateMode = 1 // insert new
	ModeUpdate UpdateMode = 2 // update existing
)

func (kv *KV) SetEx(key []byte, val []byte, mode UpdateMode) (updated bool, err error)

func (kv *KV) Set(key []byte, val []byte) (updated bool, err error) {
	return kv.SetEx(key, val, ModeUpsert)
}

func (kv *KV) Del(key []byte) (deleted bool, err error)

// QzBQWVJJOUhU https://trialofcode.org/