package kvstore

// KVStore is a simple key-value store interface
type KVStore interface {
	// Get retrieves a value for a given key. Returns nil if not found.
	Get(key []byte) ([]byte, error)
	
	// Set stores a value for a given key
	Set(key []byte, value []byte) error
	
	// Delete removes a key and its value
	Delete(key []byte) error
	
	// Close releases any resources held by the store
	Close() error

	// Scan iterates through all keys with the given prefix.
	// For each key-value pair, fn is called. If fn returns false, iteration stops.
	Scan(prefix []byte, fn func(key []byte, value []byte) bool) error
}