Initial commit

Initial public review release v0.10.0

lib/localstore/meta.go

@@ -0,0 +1,52 @@
+package localstore
+
+import (
+	"context"
+
+	"github.com/nspcc-dev/neofs-api-go/hash"
+	"github.com/nspcc-dev/neofs-api-go/refs"
+	"github.com/pkg/errors"
+)
+
+// StoreEpochValue is a context key of object storing epoch number.
+const StoreEpochValue = "store epoch"
+
+func (l *localstore) Meta(key refs.Address) (*ObjectMeta, error) {
+	var (
+		err  error
+		meta ObjectMeta
+		k, v []byte
+	)
+
+	k, err = key.Hash()
+	if err != nil {
+		return nil, errors.Wrap(err, "Localstore Meta failed on key.Marshal")
+	}
+
+	v, err = l.metaBucket.Get(k)
+	if err != nil {
+		return nil, errors.Wrap(err, "Localstore Meta failed on metaBucket.Get")
+	}
+
+	if err := meta.Unmarshal(v); err != nil {
+		return nil, errors.Wrap(err, "Localstore Metafailed on ObjectMeta.Unmarshal")
+	}
+
+	return &meta, nil
+}
+
+func metaFromObject(ctx context.Context, obj *Object) *ObjectMeta {
+	meta := new(ObjectMeta)
+	o := *obj
+	meta.Object = &o
+	meta.Object.Payload = nil
+	meta.PayloadSize = uint64(len(obj.Payload))
+	meta.PayloadHash = hash.Sum(obj.Payload)
+
+	storeEpoch, ok := ctx.Value(StoreEpochValue).(uint64)
+	if ok {
+		meta.StoreEpoch = storeEpoch
+	}
+
+	return meta
+}