feat(communities): retry downloading archive data

When fetching torrent info after receiving a magnet link,
it can happen that the request times out.

We want to retry downloading the data again at least once more
before giving up

protocol/communities/manager.go

@@ -36,6 +36,8 @@ var defaultAnnounceList = [][]string{
 }
 var pieceLength = 100 * 1024
 
+var ErrTorrentTimedout = errors.New("torrent has timed out")
+
 type Manager struct {
 	persistence                  *Persistence
 	ensSubscription              chan []*ens.VerificationRecord
@@ -1929,7 +1931,7 @@ func (m *Manager) DownloadHistoryArchivesByMagnetlink(communityID types.HexBytes
 	m.LogStdout("fetching torrent info", zap.String("magnetlink", magnetlink))
 	select {
 	case <-timeout:
-		return nil, errors.New("torrent has timed out")
+		return nil, ErrTorrentTimedout
 	case <-torrent.GotInfo():
 		files := torrent.Files()
 

protocol/messenger_handler.go

@@ -925,10 +925,19 @@ func (m *Messenger) HandleHistoryArchiveMagnetlinkMessage(state *ReceivedMessage
 			go func() {
 				downloadedArchiveIDs, err := m.communitiesManager.DownloadHistoryArchivesByMagnetlink(id, magnetlink)
 				if err != nil {
-					log.Println("failed to download history archive data", err)
-					m.logger.Debug("failed to download history archive data", zap.Error(err))
+					logMsg := "failed to download history archive data"
+					if err == communities.ErrTorrentTimedout {
+						m.communitiesManager.LogStdout("torrent has timed out, trying once more...")
+						downloadedArchiveIDs, err = m.communitiesManager.DownloadHistoryArchivesByMagnetlink(id, magnetlink)
+						if err != nil {
+							m.communitiesManager.LogStdout(logMsg, zap.Error(err))
 							return
 						}
+					} else {
+						m.communitiesManager.LogStdout(logMsg, zap.Error(err))
+						return
+					}
+				}
 
 				messagesToHandle, err := m.communitiesManager.ExtractMessagesFromHistoryArchives(id, downloadedArchiveIDs)
 				if err != nil {