kv

type KVStore interface {
	KVStoreWriter
	KVStoreReader
}

type KVStoreReader interface {
	// Get returns the value, or nil if not found
	Get(key Key) ([]byte, error)
	Has(key Key) (bool, error)
	Iterate(prefix Key, f func(key Key, value []byte) bool) error
	IterateKeys(prefix Key, f func(key Key) bool) error

	// MustGet returns the value, or nil if not found
	MustGet(key Key) []byte
	MustHas(key Key) bool
	MustIterate(prefix Key, f func(key Key, value []byte) bool)
	MustIterateKeys(prefix Key, f func(key Key) bool)
}

type KVStoreWriter interface {
	Set(key Key, value []byte)
	Del(key Key)
}

type Key string