kvstore

type BadgerBackupMeta struct {
	Algo            string `json:"algo"`              // AES-256-GCM
	NonceB64        string `json:"nonce_b64"`         // base64 nonce
	CreatedAt       string `json:"created_at"`        // RFC3339
	Since           uint64 `json:"since"`             // input watermark
	NextSince       uint64 `json:"next_since"`        // output watermark
	EncryptionKeyID string `json:"encryption_key_id"` // sha256(key) prefix
}

type BadgerBackupVersionInfo struct {
	Version   uint64 `json:"version"`    // Human-readable counter
	Since     uint64 `json:"since"`      // Badger internal backup offset
	UpdatedAt string `json:"updated_at"` // RFC3339
}

type BadgerConfig struct {
	NodeID              string
	EncryptionKey       []byte
	BackupEncryptionKey []byte
	BackupDir           string
	DBPath              string
}

type BadgerKVStore struct {
	DB             *badger.DB
	BackupExecutor *badgerBackupExecutor
}

type KVStore interface {
	// Put stores a key-value pair in the store.
	Put(key string, value []byte) error

	// Get retrieves the value associated with a key. If the key is not found, it returns an empty slice.
	Get(key string) ([]byte, error)

	// Delete removes a key-value pair from the store.
	Delete(key string) error

	// Close closes the key-value store.
	Close() error

	Backup() error
}