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

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

pkg/local_object_storage/writecache/iterate.go

@@ -1,39 +0,0 @@
-package writecache
-
-import (
-	"errors"
-	"fmt"
-
-	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/internal/metaerr"
-	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
-	"go.etcd.io/bbolt"
-)
-
-// ErrNoDefaultBucket is returned by IterateDB when default bucket for objects is missing.
-var ErrNoDefaultBucket = errors.New("no default bucket")
-
-// IterateDB iterates over all objects stored in bbolt.DB instance and passes them to f until error return.
-// It is assumed that db is an underlying database of some WriteCache instance.
-//
-// Returns ErrNoDefaultBucket if there is no default bucket in db.
-//
-// DB must not be nil and should be opened.
-func IterateDB(db *bbolt.DB, f func(oid.Address) error) error {
-	return metaerr.Wrap(db.View(func(tx *bbolt.Tx) error {
-		b := tx.Bucket(defaultBucket)
-		if b == nil {
-			return ErrNoDefaultBucket
-		}
-
-		var addr oid.Address
-
-		return b.ForEach(func(k, v []byte) error {
-			err := addr.DecodeString(string(k))
-			if err != nil {
-				return fmt.Errorf("could not parse object address: %w", err)
-			}
-
-			return f(addr)
-		})
-	}))
-}