diff --git a/cmd/downloader/downloader/downloader.go b/cmd/downloader/downloader/downloader.go
index 4e167c951c8..5ea02a0fe33 100644
--- a/cmd/downloader/downloader/downloader.go
+++ b/cmd/downloader/downloader/downloader.go
@@ -19,6 +19,7 @@ import (
 	"github.com/ledgerwatch/erigon/common"
 	"github.com/ledgerwatch/log/v3"
 	mdbx2 "github.com/torquem-ch/mdbx-go/mdbx"
+	"go.uber.org/atomic"
 	"golang.org/x/sync/semaphore"
 )
 
@@ -96,7 +97,10 @@ func New(cfg *downloadercfg.Cfg) (*Downloader, error) {
 
 		statsLock: &sync.RWMutex{},
 	}
-	return d, d.addSegments()
+	if err := d.addSegments(); err != nil {
+		return nil, err
+	}
+	return d, nil
 }
 
 func (d *Downloader) SnapDir() string {
@@ -226,6 +230,45 @@ func (d *Downloader) onComplete() {
 	_ = d.addSegments()
 }
 
+func (d *Downloader) verify() error {
+	total := 0
+	for _, t := range d.torrentClient.Torrents() {
+		select {
+		case <-t.GotInfo():
+			total += t.NumPieces()
+		default:
+			continue
+		}
+	}
+	logInterval := 20 * time.Second
+	logEvery := time.NewTicker(logInterval)
+	defer logEvery.Stop()
+
+	wg := &sync.WaitGroup{}
+	j := atomic.NewInt64(0)
+
+	for _, t := range d.torrentClient.Torrents() {
+		wg.Add(1)
+		go func(t *torrent.Torrent) {
+			defer wg.Done()
+			for i := 0; i < t.NumPieces(); i++ {
+				j.Inc()
+				t.Piece(i).VerifyData()
+
+				select {
+				case <-logEvery.C:
+					log.Info("[snapshots] Verifying", "progress", fmt.Sprintf("%.2f%%", 100*float64(j.Load())/float64(total)))
+				default:
+				}
+				//<-t.Complete.On()
+			}
+		}(t)
+	}
+	wg.Wait()
+
+	return nil
+}
+
 func (d *Downloader) addSegments() error {
 	if err := BuildTorrentFilesIfNeed(context.Background(), d.cfg.DataDir); err != nil {
 		return err
@@ -325,12 +368,12 @@ func MainLoop(ctx context.Context, d *Downloader, silent bool) {
 				t.AllowDataDownload()
 				t.DownloadAll()
 				go func(t *torrent.Torrent) {
+					defer sem.Release(1)
 					//r := t.NewReader()
 					//r.SetReadahead(t.Length())
 					//_, _ = io.Copy(io.Discard, r) // enable streaming - it will prioritize sequential download
 
 					<-t.Complete.On()
-					sem.Release(1)
 				}(t)
 			}
 			time.Sleep(30 * time.Second)
diff --git a/cmd/downloader/downloader/downloader_grpc_server.go b/cmd/downloader/downloader/downloader_grpc_server.go
index 60bb4642459..11f1f596039 100644
--- a/cmd/downloader/downloader/downloader_grpc_server.go
+++ b/cmd/downloader/downloader/downloader_grpc_server.go
@@ -77,6 +77,14 @@ func (s *GrpcServer) Download(ctx context.Context, request *proto_downloader.Dow
 	return &emptypb.Empty{}, nil
 }
 
+func (s *GrpcServer) Verify(ctx context.Context, request *proto_downloader.VerifyRequest) (*emptypb.Empty, error) {
+	err := s.d.verify()
+	if err != nil {
+		return nil, err
+	}
+	return &emptypb.Empty{}, nil
+}
+
 func (s *GrpcServer) Stats(ctx context.Context, request *proto_downloader.StatsRequest) (*proto_downloader.StatsReply, error) {
 	stats := s.d.Stats()
 	return &proto_downloader.StatsReply{
diff --git a/cmd/downloader/main.go b/cmd/downloader/main.go
index 6f833871ac1..731fd5ab3bf 100644
--- a/cmd/downloader/main.go
+++ b/cmd/downloader/main.go
@@ -118,7 +118,6 @@ func Downloader(ctx context.Context) error {
 	if err != nil {
 		return err
 	}
-	log.Info("torrentLogLevel", torrentLogLevel)
 
 	var downloadRate, uploadRate datasize.ByteSize
 	if err := downloadRate.UnmarshalText([]byte(downloadRateStr)); err != nil {
diff --git a/cmd/utils/flags.go b/cmd/utils/flags.go
index 50150af6354..d4cc43990ef 100644
--- a/cmd/utils/flags.go
+++ b/cmd/utils/flags.go
@@ -668,6 +668,10 @@ var (
 		Name:  "no-downloader",
 		Usage: "to disable downloader component",
 	}
+	DownloaderVerifyFlag = cli.BoolFlag{
+		Name:  "downloader.verify",
+		Usage: "verify snapshots on startup. it will not report founded problems but just re-download broken pieces",
+	}
 	TorrentPortFlag = cli.IntFlag{
 		Name:  "torrent.port",
 		Value: 42069,
@@ -1389,6 +1393,7 @@ func SetEthConfig(ctx *cli.Context, nodeConfig *nodecfg.Config, cfg *ethconfig.C
 	cfg.Snapshot.KeepBlocks = ctx.GlobalBool(SnapKeepBlocksFlag.Name)
 	cfg.Snapshot.Produce = !ctx.GlobalBool(SnapStopFlag.Name)
 	cfg.Snapshot.NoDownloader = ctx.GlobalBool(NoDownloaderFlag.Name)
+	cfg.Snapshot.Verify = ctx.GlobalBool(DownloaderVerifyFlag.Name)
 	cfg.Snapshot.DownloaderAddr = strings.TrimSpace(ctx.GlobalString(DownloaderAddrFlag.Name))
 	if cfg.Snapshot.DownloaderAddr == "" {
 		downloadRateStr := ctx.GlobalString(TorrentDownloadRateFlag.Name)
diff --git a/eth/ethconfig/config.go b/eth/ethconfig/config.go
index 0e4e745f577..dc54c9b31cb 100644
--- a/eth/ethconfig/config.go
+++ b/eth/ethconfig/config.go
@@ -125,6 +125,7 @@ type Snapshot struct {
 	KeepBlocks     bool // produce new snapshots of blocks but don't remove blocks from DB
 	Produce        bool // produce new snapshots
 	NoDownloader   bool // possible to use snapshots without calling Downloader
+	Verify         bool // verify snapshots on startup
 	DownloaderAddr string
 }
 
diff --git a/eth/stagedsync/stage_headers.go b/eth/stagedsync/stage_headers.go
index e94db76b84b..204f76b301f 100644
--- a/eth/stagedsync/stage_headers.go
+++ b/eth/stagedsync/stage_headers.go
@@ -1302,13 +1302,14 @@ func WaitForDownloader(ctx context.Context, cfg HeadersCfg) error {
 	}
 	logEvery := time.NewTicker(logInterval)
 	defer logEvery.Stop()
+	var m runtime.MemStats
 
 	// Check once without delay, for faster erigon re-start
-	if stats, err := cfg.snapshotDownloader.Stats(ctx, &proto_downloader.StatsRequest{}); err == nil && stats.Completed {
-		return nil
+	stats, err := cfg.snapshotDownloader.Stats(ctx, &proto_downloader.StatsRequest{})
+	if err == nil && stats.Completed {
+		goto Finish
 	}
 
-	var m runtime.MemStats
 	// Print download progress until all segments are available
 Loop:
 	for {
@@ -1319,6 +1320,11 @@ Loop:
 			if stats, err := cfg.snapshotDownloader.Stats(ctx, &proto_downloader.StatsRequest{}); err != nil {
 				log.Warn("Error while waiting for snapshots progress", "err", err)
 			} else if stats.Completed {
+				if !cfg.snapshots.Cfg().Verify { // will verify after loop
+					if _, err := cfg.snapshotDownloader.Verify(ctx, &proto_downloader.VerifyRequest{}); err != nil {
+						return err
+					}
+				}
 				break Loop
 			} else {
 				if stats.MetadataReady < stats.FilesTotal {
@@ -1338,5 +1344,12 @@ Loop:
 			}
 		}
 	}
+
+Finish:
+	if cfg.snapshots.Cfg().Verify {
+		if _, err := cfg.snapshotDownloader.Verify(ctx, &proto_downloader.VerifyRequest{}); err != nil {
+			return err
+		}
+	}
 	return nil
 }
diff --git a/go.mod b/go.mod
index 68ed3b07b6b..bebbc1d6159 100644
--- a/go.mod
+++ b/go.mod
@@ -35,7 +35,7 @@ require (
 	github.com/json-iterator/go v1.1.12
 	github.com/julienschmidt/httprouter v1.3.0
 	github.com/kevinburke/go-bindata v3.21.0+incompatible
-	github.com/ledgerwatch/erigon-lib v0.0.0-20220629154434-59f7b5b57b68
+	github.com/ledgerwatch/erigon-lib v0.0.0-20220701042032-ed452dbc4b21
 	github.com/ledgerwatch/log/v3 v3.4.1
 	github.com/ledgerwatch/secp256k1 v1.0.0
 	github.com/nxadm/tail v1.4.9-0.20211216163028-4472660a31a6
diff --git a/go.sum b/go.sum
index 40b0cee0689..b99c0955a95 100644
--- a/go.sum
+++ b/go.sum
@@ -386,8 +386,8 @@ github.com/kylelemons/godebug v0.0.0-20170224010052-a616ab194758 h1:0D5M2HQSGD3P
 github.com/kylelemons/godebug v0.0.0-20170224010052-a616ab194758/go.mod h1:B69LEHPfb2qLo0BaaOLcbitczOKLWTsrBG9LczfCD4k=
 github.com/leanovate/gopter v0.2.9 h1:fQjYxZaynp97ozCzfOyOuAGOU4aU/z37zf/tOujFk7c=
 github.com/leanovate/gopter v0.2.9/go.mod h1:U2L/78B+KVFIx2VmW6onHJQzXtFb+p5y3y2Sh+Jxxv8=
-github.com/ledgerwatch/erigon-lib v0.0.0-20220629154434-59f7b5b57b68 h1:GWy2Jan7bkQe7xkptxxM2zWCjNyxGNDgSUl30oDMmHQ=
-github.com/ledgerwatch/erigon-lib v0.0.0-20220629154434-59f7b5b57b68/go.mod h1:7sQ5B5m54zoo7RVRVukH3YZCYVrCC+BmwDBD+9KyTrE=
+github.com/ledgerwatch/erigon-lib v0.0.0-20220701042032-ed452dbc4b21 h1:mZAojUAtvuvFLS8sumuYlZrHKGvkjTBxA6fvvujT/Kc=
+github.com/ledgerwatch/erigon-lib v0.0.0-20220701042032-ed452dbc4b21/go.mod h1:7sQ5B5m54zoo7RVRVukH3YZCYVrCC+BmwDBD+9KyTrE=
 github.com/ledgerwatch/log/v3 v3.4.1 h1:/xGwlVulXnsO9Uq+tzaExc8OWmXXHU0dnLalpbnY5Bc=
 github.com/ledgerwatch/log/v3 v3.4.1/go.mod h1:VXcz6Ssn6XEeU92dCMc39/g1F0OYAjw1Mt+dGP5DjXY=
 github.com/ledgerwatch/secp256k1 v1.0.0 h1:Usvz87YoTG0uePIV8woOof5cQnLXGYa162rFf3YnwaQ=
diff --git a/turbo/cli/default_flags.go b/turbo/cli/default_flags.go
index af923646c0e..93d61401c22 100644
--- a/turbo/cli/default_flags.go
+++ b/turbo/cli/default_flags.go
@@ -123,6 +123,7 @@ var DefaultFlags = []cli.Flag{
 	utils.SentryLogPeerInfoFlag,
 	utils.DownloaderAddrFlag,
 	utils.NoDownloaderFlag,
+	utils.DownloaderVerifyFlag,
 	HealthCheckFlag,
 	utils.HeimdallURLFlag,
 	utils.WithoutHeimdallFlag,
diff --git a/turbo/shards/state_change_accumulator.go b/turbo/shards/state_change_accumulator.go
index 9fdf9f0b8dc..dc7372c9537 100644
--- a/turbo/shards/state_change_accumulator.go
+++ b/turbo/shards/state_change_accumulator.go
@@ -81,7 +81,7 @@ func (a *Accumulator) ChangeAccount(address common.Address, incarnation uint64,
 		accountChange.Action = remote.Action_UPSERT
 	case remote.Action_CODE:
 		accountChange.Action = remote.Action_UPSERT_CODE
-	case remote.Action_DELETE:
+	case remote.Action_REMOVE:
 		panic("")
 	}
 	accountChange.Incarnation = incarnation
@@ -104,7 +104,7 @@ func (a *Accumulator) DeleteAccount(address common.Address) {
 	accountChange.Data = nil
 	accountChange.Code = nil
 	accountChange.StorageChanges = nil
-	accountChange.Action = remote.Action_DELETE
+	accountChange.Action = remote.Action_REMOVE
 }
 
 // ChangeCode adds code to the latest change
@@ -122,7 +122,7 @@ func (a *Accumulator) ChangeCode(address common.Address, incarnation uint64, cod
 		accountChange.Action = remote.Action_CODE
 	case remote.Action_UPSERT:
 		accountChange.Action = remote.Action_UPSERT_CODE
-	case remote.Action_DELETE:
+	case remote.Action_REMOVE:
 		panic("")
 	}
 	accountChange.Incarnation = incarnation
@@ -138,7 +138,7 @@ func (a *Accumulator) ChangeStorage(address common.Address, incarnation uint64,
 		a.accountChangeIndex[address] = i
 	}
 	accountChange := a.latestChange.Changes[i]
-	if accountChange.Action == remote.Action_DELETE {
+	if accountChange.Action == remote.Action_REMOVE {
 		panic("")
 	}
 	accountChange.Incarnation = incarnation