[#378] object/delete: Set expiration epoch of the created tombstones

Make object delete service to use network information to calculate and set
expiration of the created tombstone.

Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>

pkg/services/object/delete/service.go

@@ -2,6 +2,7 @@ package deletesvc
 
 import (
 	objectSDK "github.com/nspcc-dev/neofs-api-go/pkg/object"
+	"github.com/nspcc-dev/neofs-node/pkg/core/netmap"
 	getsvc "github.com/nspcc-dev/neofs-node/pkg/services/object/get"
 	putsvc "github.com/nspcc-dev/neofs-node/pkg/services/object/put"
 	searchsvc "github.com/nspcc-dev/neofs-node/pkg/services/object/search"
@@ -17,6 +18,15 @@ type Service struct {
 // Option is a Service's constructor option.
 type Option func(*cfg)
 
+// NetworkInfo wraps network state and configurations.
+type NetworkInfo interface {
+	netmap.State
+
+	// Must return the lifespan of the tombstones
+	// in the NeoFS epochs.
+	TombstoneLifetime() (uint64, error)
+}
+
 type cfg struct {
 	log *logger.Logger
 
@@ -37,6 +47,8 @@ type cfg struct {
 	placer interface {
 		put(*execCtx, bool) (*objectSDK.ID, error)
 	}
+
+	netInfo NetworkInfo
 }
 
 func defaultCfg() *cfg {
@@ -87,3 +99,10 @@ func WithPutService(p *putsvc.Service) Option {
 		c.placer = (*putSvcWrapper)(p)
 	}
 }
+
+// WithNetworkInfo returns option to set network information source.
+func WithNetworkInfo(netInfo NetworkInfo) Option {
+	return func(c *cfg) {
+		c.netInfo = netInfo
+	}
+}