[#421] Try using badger for the write-cache

Signed-off-by: Alejandro Lopez <a.lopez@yadro.com>

pkg/local_object_storage/writecache/writecachebadger/util.go

@@ -0,0 +1,36 @@
+package writecachebadger
+
+import (
+	"fmt"
+
+	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/util/logger"
+	"github.com/dgraph-io/badger/v4"
+)
+
+// OpenDB opens a badger instance for write-cache. Opens in read-only mode if ro is true.
+func OpenDB(p string, ro bool, l *logger.Logger) (*badger.DB, error) {
+	return badger.Open(badger.DefaultOptions(p).
+		WithReadOnly(ro).
+		WithLoggingLevel(badger.ERROR).
+		WithLogger(badgerLoggerWrapper{l}))
+}
+
+type badgerLoggerWrapper struct {
+	l *logger.Logger
+}
+
+func (w badgerLoggerWrapper) Errorf(msg string, args ...any) {
+	w.l.Error(fmt.Sprintf(msg, args...))
+}
+
+func (w badgerLoggerWrapper) Warningf(msg string, args ...any) {
+	w.l.Error(fmt.Sprintf(msg, args...))
+}
+
+func (w badgerLoggerWrapper) Infof(msg string, args ...any) {
+	w.l.Error(fmt.Sprintf(msg, args...))
+}
+
+func (w badgerLoggerWrapper) Debugf(msg string, args ...any) {
+	w.l.Error(fmt.Sprintf(msg, args...))
+}