[#316] ir: Use LOCODE validator as NodeValidator in Netmap processor

Implement DB interface required by LOCODE validator on new wrapper over the
LOCODE Bolt DB (Record on new wrapper over LOCODE Bolt DB entries).
Construct LOCODE validator and pass it to Netmap processor's constructor as
NodeValidator parameter.

Thus, candidates for a network map must set LOCODE attribute for which there
is an entry in the NeoFS location database.

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

pkg/innerring/innerring.go

@@ -373,6 +373,11 @@ func New(ctx context.Context, log *zap.Logger, cfg *viper.Viper) (*Server, error
 		settlement.WithLogger(server.log),
 	)
 
+	locodeValidator, err := server.newLocodeValidator(cfg)
+	if err != nil {
+		return nil, err
+	}
+
 	// create netmap processor
 	netmapProcessor, err := netmap.New(&netmap.Params{
 		Log:              log,
@@ -391,6 +396,7 @@ func New(ctx context.Context, log *zap.Logger, cfg *viper.Viper) (*Server, error
 		AuditSettlementsHandler: server.onlyActiveEventHandler(
 			settlementProcessor.HandleAuditEvent,
 		),
+		NodeValidator: locodeValidator,
 	})
 	if err != nil {
 		return nil, err

pkg/innerring/locode.go

@@ -0,0 +1,51 @@
+package innerring
+
+import (
+	"github.com/nspcc-dev/neofs-node/pkg/innerring/processors/netmap"
+	irlocode "github.com/nspcc-dev/neofs-node/pkg/innerring/processors/netmap/nodevalidation/locode"
+	"github.com/nspcc-dev/neofs-node/pkg/util/locode"
+	locodedb "github.com/nspcc-dev/neofs-node/pkg/util/locode/db"
+	locodebolt "github.com/nspcc-dev/neofs-node/pkg/util/locode/db/boltdb"
+	"github.com/spf13/viper"
+)
+
+func (s *Server) newLocodeValidator(cfg *viper.Viper) (netmap.NodeValidator, error) {
+	locodeDB := locodebolt.New(locodebolt.Prm{
+		Path: cfg.GetString("locode.db.path"),
+	})
+
+	s.registerStarter(locodeDB.Open)
+	s.registerIOCloser(locodeDB)
+
+	return irlocode.New(irlocode.Prm{
+		DB: (*locodeBoltDBWrapper)(locodeDB),
+	}), nil
+}
+
+type locodeBoltEntryWrapper struct {
+	*locodedb.Key
+	*locodedb.Record
+}
+
+func (l *locodeBoltEntryWrapper) LocationName() string {
+	return l.Record.CityName()
+}
+
+type locodeBoltDBWrapper locodebolt.DB
+
+func (l *locodeBoltDBWrapper) Get(lc *locode.LOCODE) (irlocode.Record, error) {
+	key, err := locodedb.NewKey(*lc)
+	if err != nil {
+		return nil, err
+	}
+
+	rec, err := (*locodebolt.DB)(l).Get(*key)
+	if err != nil {
+		return nil, err
+	}
+
+	return &locodeBoltEntryWrapper{
+		Key:    key,
+		Record: rec,
+	}, nil
+}