multipart: Set hashless header creation epoch

Signed-off-by: Evgenii Baidakov <evgenii@nspcc.io>

Author: smallhive

api/layer/multipart_upload.go

@@ -467,6 +467,7 @@ func (n *layer) uploadZeroPart(ctx context.Context, multipartInfo *data.Multipar
 	hashlessHeaderObject.SetType(object.TypeRegular)
 	hashlessHeaderObject.SetOwnerID(&bktInfo.Owner)
 	hashlessHeaderObject.SetAttributes(attrs...)
+	hashlessHeaderObject.SetCreationEpoch(n.neoFS.CurrentEpoch())
 
 	currentVersion := version.Current()
 	hashlessHeaderObject.SetVersion(&currentVersion)

api/layer/neofs.go

@@ -250,4 +250,7 @@ type NeoFS interface {
 
 	// IsHomomorphicHashingEnabled shows if homomorphic hashing is enabled in config.
 	IsHomomorphicHashingEnabled() bool
+
+	// CurrentEpoch returns current epoch.
+	CurrentEpoch() uint64
 }

internal/neofs/neofs.go

@@ -537,6 +537,11 @@ func (x *NeoFS) IsHomomorphicHashingEnabled() bool {
 	return x.cfg.IsHomomorphicEnabled
 }
 
+// CurrentEpoch returns current epoch.
+func (x *NeoFS) CurrentEpoch() uint64 {
+	return x.epochGetter.CurrentEpoch()
+}
+
 func isErrAccessDenied(err error) (string, bool) {
 	unwrappedErr := errors.Unwrap(err)
 	for unwrappedErr != nil {