diff --git a/.fixme/log b/.fixme/log
index 55f3b5e0..85920119 100644
--- a/.fixme/log
+++ b/.fixme/log
@@ -206,4 +206,5 @@ fixme-set "assigned" "voidlizard" "AR3Ppzm1E2"
 fixme-set "workflow" "test" "AR3Ppzm1E2"
 fixme-set "workflow" "test" "BZjzN7BjQ4"
 fixme-set "workflow" "wip" "6spiDvVE3q"
-fixme-set "assigned" "voidlizard" "6spiDvVE3q"
\ No newline at end of file
+fixme-set "assigned" "voidlizard" "6spiDvVE3q"
+fixme-set "workflow" "test" "6spiDvVE3q"
\ No newline at end of file
diff --git a/hbs2-peer/app/BlockDownload.hs b/hbs2-peer/app/BlockDownload.hs
index 96ce8e7e..531778c9 100644
--- a/hbs2-peer/app/BlockDownload.hs
+++ b/hbs2-peer/app/BlockDownload.hs
@@ -13,8 +13,8 @@ import HBS2.Hash
 import HBS2.Merkle
 import HBS2.Net.PeerLocator
 import HBS2.Net.Proto
-import HBS2.Net.Proto.Peer
 import HBS2.Net.Proto.Definition
+import HBS2.Net.Proto.Peer
 import HBS2.Net.Proto.Sessions
 import HBS2.Prelude.Plated
 import HBS2.Storage
@@ -27,13 +27,9 @@ import Control.Concurrent.Async
 import Control.Concurrent.STM
 import Control.Monad.Reader
 import Control.Monad.Trans.Maybe
-import Control.Concurrent.STM.TSem as Sem
 import Data.ByteString.Lazy (ByteString)
-import Data.Cache (Cache)
 import Data.Cache qualified as Cache
 import Data.Foldable hiding (find)
-import Data.Hashable
-import Data.HashMap.Strict (HashMap)
 import Data.HashMap.Strict qualified as HashMap
 import Data.IntMap (IntMap)
 import Data.IntMap qualified as IntMap
@@ -41,12 +37,7 @@ import Data.IntSet qualified as IntSet
 import Data.List qualified as List
 import Data.Maybe
 import Data.Set qualified as Set
-import Data.Set (Set)
 import Lens.Micro.Platform
-import Numeric ( showGFloat )
-import Prettyprinter
-import System.Random.Shuffle
-import Type.Reflection
 
 
 getBlockForDownload :: MonadIO m => BlockDownloadM e m (Hash HbSync)
@@ -169,20 +160,6 @@ processBlock h = do
 --       So make sure that this peer really answered to
 --       GetBlockSize request
 
-type DownloadFromPeerStuff e m = ( MyPeer e
-                                 , MonadIO m
-                                 , Request e (BlockInfo e) m
-                                 , Request e (BlockChunks e) m
-                                 , MonadReader (PeerEnv e ) m
-                                 , PeerMessaging e
-                                 , HasProtocol e (BlockInfo e)
-                                 , EventListener e (BlockInfo e) m
-                                 , EventListener e (BlockChunks e) m
-                                 , Sessions e (BlockChunks e) m
-                                 , Sessions e (PeerInfo e) m
-                                 , Block ByteString ~ ByteString
-                                 , HasStorage m
-                                 )
 
 downloadFromWithPeer :: forall e m . DownloadFromPeerStuff e m
                      => Peer e
@@ -378,6 +355,7 @@ blockDownloadLoop :: forall e  m . ( m ~ PeerM e IO
                                    , EventListener e (BlockAnnounce e) m
                                    , EventListener e (PeerHandshake e) m
                                    , EventEmitter e (BlockChunks e) m
+                                   , EventEmitter e (DownloadReq e) m
                                    , Sessions e (BlockChunks e) m
                                    , Sessions e (PeerInfo e) m
                                    , Sessions e (KnownPeer e) m
diff --git a/hbs2-peer/app/DownloadQ.hs b/hbs2-peer/app/DownloadQ.hs
new file mode 100644
index 00000000..fc59e314
--- /dev/null
+++ b/hbs2-peer/app/DownloadQ.hs
@@ -0,0 +1,107 @@
+{-# Language AllowAmbiguousTypes #-}
+module DownloadQ where
+
+import HBS2.Prelude
+import HBS2.Clock
+import HBS2.Hash
+import HBS2.Events
+import HBS2.Data.Types.Refs
+import HBS2.Actors.Peer
+import HBS2.Storage
+import HBS2.Merkle
+import HBS2.System.Logger.Simple
+
+import PeerTypes
+import PeerConfig
+
+import Data.Map qualified as Map
+import Data.Foldable
+import Control.Concurrent.STM
+import Data.ByteString.Char8 qualified as B8
+import Data.List (nub)
+import Data.Maybe
+import Data.Functor
+import Data.Function
+import Control.Exception
+import Control.Monad
+import System.IO
+
+
+downloadLogAppend :: forall e m . ( MonadIO m
+                                  , EventEmitter e (DownloadReq e) m
+                                  , DownloadFromPeerStuff e m
+                                  ) => Hash HbSync -> m ()
+downloadLogAppend h = do
+  emit @e DownloadReqKey (DownloadReqData h)
+
+noLogFile :: MonadIO m => m ()
+noLogFile = err "download log not defined"
+
+downloadQueue :: forall e m . ( MyPeer e
+                              , DownloadFromPeerStuff e m
+                              , EventListener e (DownloadReq e) m
+                              ) => PeerConfig -> DownloadEnv e -> m ()
+
+downloadQueue conf denv = do
+
+  sto <- getStorage
+  hq <- liftIO newTQueueIO
+
+  pause @'Seconds 1
+
+  let qfile' = cfgValue @PeerDownloadLogKey conf :: Maybe String
+
+  subscribe @e DownloadReqKey $ \(DownloadReqData h) -> do
+    liftIO $ atomically $ writeTQueue hq h
+
+  maybe1 qfile' noLogFile $ \fn -> forever do
+
+    debug $ "downloadQueue" <+> pretty fn
+
+    liftIO do
+
+      r <- catchAny (B8.readFile fn) (\e -> whimper e >> pure "")
+
+      let hashes = B8.lines r & mapMaybe (fromStringMay . B8.unpack) & nub :: [Hash HbSync]
+
+      fromq <- liftIO $ atomically $ flushTQueue hq
+      let hashesWip = nub ( hashes <> fromq )
+
+      errnum <- newTVarIO mempty
+
+      let walk h = walkMerkle h (getBlock sto) $ \(hr :: Either (Hash HbSync) [HashRef]) -> do
+            case hr of
+              Left{} -> atomically $ modifyTVar errnum (mappend [(h,True)])
+              Right (hrr :: [HashRef]) -> do
+                 forM_ hrr $ \(HashRef hx) -> do
+                     mblk <- hasBlock sto hx
+                     case mblk of
+                       Nothing  -> atomically $ modifyTVar errnum (mappend [(h,True)])
+                       _ -> pure ()
+
+      for_ hashesWip walk
+
+      loosers <- readTVarIO errnum <&> Map.fromListWith (||) <&> Map.filter id
+
+      -- debug $ vcat (fmap pretty (Map.toList loosers))
+
+      let leftovers = [ x | x <- hashesWip , Map.member x loosers ]
+
+      for_ leftovers $ withDownload denv . addDownload
+
+      catchAny ( B8.writeFile fn ( B8.unlines (fmap (B8.pack.show.pretty) leftovers) ) )
+               whimper
+
+    debug "downloadQueue okay"
+
+    -- TODO: remove-downloadQueue-pause-hardcode
+    pause @'Seconds 300
+    -- FIXME: only-debug-20-sec
+
+  where
+    whimper e = err (pretty $ show e)
+
+    catchAny :: IO a -> (SomeException -> IO a) -> IO a
+    catchAny = Control.Exception.catch
+
+
diff --git a/hbs2-peer/app/PeerConfig.hs b/hbs2-peer/app/PeerConfig.hs
index 90592cd4..b6a3647d 100644
--- a/hbs2-peer/app/PeerConfig.hs
+++ b/hbs2-peer/app/PeerConfig.hs
@@ -37,6 +37,11 @@ type C = MegaParsec
 pattern Key :: forall {c}. Id -> [Syntax c] -> [Syntax c]
 pattern Key n ns <- SymbolVal  n : ns
 
+data PeerDownloadLogKey
+
+instance HasCfgKey PeerDownloadLogKey (Maybe String) where
+  key = "download-log"
+
 cfgName :: FilePath
 cfgName = "config"
 
@@ -85,6 +90,11 @@ peerConfigInit mbfp = liftIO do
     appendFile (dir</>cfgName) ";; hbs2-peer config file"
     appendFile (dir</>cfgName) defConfigData
 
+peerConfDef :: String
+peerConfDef = [qc|
+  download-log  "./download-log"
+|]
+
 peerConfigRead :: MonadIO m => Maybe FilePath -> m PeerConfig
 peerConfigRead mbfp = do
 
@@ -112,7 +122,9 @@ peerConfigRead mbfp = do
 
     debug $ pretty cfgPath
 
-    confData <- liftIO $ readFile cfgPath <&> parseTop <&> either mempty id
+    confData' <- liftIO $ readFile cfgPath <&> parseTop <&> either mempty id
+
+    let confData = confData' <> either mempty id (parseTop  peerConfDef)
 
     debug $ pretty confData
 
@@ -125,6 +137,10 @@ peerConfigRead mbfp = do
                   kp <- liftIO $ canonicalizePath (dir </> Text.unpack p)
                   pure $ List @C co [Symbol co "storage", Literal co (mkLit (Text.pack kp)) ]
 
+                List co (Key "download-log" [LitStrVal p]) -> do
+                  kp <- liftIO $ canonicalizePath (dir </> Text.unpack p)
+                  pure $ List @C co [Symbol co "download-log", Literal co (mkLit (Text.pack kp)) ]
+
                 x -> pure x
 
     pure $ PeerConfig config
diff --git a/hbs2-peer/app/PeerMain.hs b/hbs2-peer/app/PeerMain.hs
index a2587e9e..f7009b05 100644
--- a/hbs2-peer/app/PeerMain.hs
+++ b/hbs2-peer/app/PeerMain.hs
@@ -31,6 +31,7 @@ import HBS2.System.Logger.Simple qualified as Log
 import RPC
 import PeerTypes
 import BlockDownload
+import DownloadQ
 import PeerInfo
 import PeerConfig
 import Bootstrap
@@ -482,6 +483,8 @@ runPeer opts = Exception.handle myException $ do
 
                 peerThread (blockDownloadLoop denv)
 
+                peerThread (downloadQueue conf denv)
+
                 peerThread $ forever $ do
                           cmd <- liftIO $ atomically $ readTQueue rpcQ
                           case cmd of
@@ -551,6 +554,7 @@ runPeer opts = Exception.handle myException $ do
 
                                        | otherwise -> do
 
+                                          downloadLogAppend @e h
                                           withDownload denv $ do
                                             processBlock h
 
@@ -584,8 +588,9 @@ runPeer opts = Exception.handle myException $ do
 
   let fetchAction h = do
         debug  $ "fetchAction" <+> pretty h
-        liftIO $ withPeerM penv
-               $ withDownload denv (processBlock h)
+        liftIO $ withPeerM penv $ do
+                  downloadLogAppend @e h
+                  withDownload denv (processBlock h)
 
   let peersAction _ = do
         who <- thatPeer (Proxy @(RPC e))
diff --git a/hbs2-peer/app/PeerTypes.hs b/hbs2-peer/app/PeerTypes.hs
index 1fc8fa93..85ed392b 100644
--- a/hbs2-peer/app/PeerTypes.hs
+++ b/hbs2-peer/app/PeerTypes.hs
@@ -3,9 +3,12 @@
 {-# Language UndecidableInstances #-}
 module PeerTypes where
 
+import HBS2.Actors.Peer
 import HBS2.Clock
 import HBS2.Defaults
+import HBS2.Events
 import HBS2.Hash
+import HBS2.Net.Messaging.UDP (UDP)
 import HBS2.Net.Proto
 import HBS2.Net.Proto.BlockInfo
 import HBS2.Net.Proto.Definition
@@ -13,7 +16,8 @@ import HBS2.Net.Proto.Sessions
 import HBS2.Prelude.Plated
 import HBS2.Storage
 import HBS2.System.Logger.Simple
-import HBS2.Net.Messaging.UDP (UDP)
+
+import PeerInfo
 
 import Control.Concurrent.Async
 import Control.Concurrent.STM
@@ -25,8 +29,49 @@ import Data.HashMap.Strict (HashMap)
 import Data.HashMap.Strict qualified as HashMap
 import Data.Maybe
 import Lens.Micro.Platform
+import Data.Hashable
+import Type.Reflection
 import Numeric (showGFloat)
-import Prettyprinter
+
+
+type MyPeer e = (Eq (Peer e), Hashable (Peer e), Pretty (Peer e))
+
+data DownloadReq e
+
+data instance EventKey e (DownloadReq e) =
+  DownloadReqKey
+  deriving (Generic,Typeable,Eq)
+
+instance Typeable (DownloadReq e) => Hashable (EventKey e (DownloadReq e)) where
+  hashWithSalt salt _ = hashWithSalt salt (someTypeRep p)
+    where
+      p = Proxy @DownloadReq
+
+newtype instance Event e (DownloadReq e) =
+  DownloadReqData (Hash HbSync)
+  deriving (Typeable)
+
+instance EventType ( Event e (DownloadReq e) ) where
+  isPersistent = True
+
+instance Expires (EventKey e (DownloadReq e)) where
+  expiresIn = const Nothing
+
+type DownloadFromPeerStuff e m = ( MyPeer e
+                                 , MonadIO m
+                                 , Request e (BlockInfo e) m
+                                 , Request e (BlockChunks e) m
+                                 , MonadReader (PeerEnv e ) m
+                                 , PeerMessaging e
+                                 , HasProtocol e (BlockInfo e)
+                                 , EventListener e (BlockInfo e) m
+                                 , EventListener e (BlockChunks e) m
+                                 , Sessions e (BlockChunks e) m
+                                 , Sessions e (PeerInfo e) m
+                                 , Block ByteString ~ ByteString
+                                 , HasStorage m
+                                 )
+
 
 calcBursts :: forall a . Integral a => a -> [a] -> [(a,a)]
 calcBursts bu pieces = go seed
@@ -104,8 +149,6 @@ data DownloadEnv e =
 
 makeLenses 'DownloadEnv
 
-class (Eq (Peer e), Hashable (Peer e), Pretty (Peer e)) => MyPeer e
-instance (Eq (Peer e), Hashable (Peer e), Pretty (Peer e)) => MyPeer e
 
 newDownloadEnv :: (MonadIO m, MyPeer e) => m (DownloadEnv e)
 newDownloadEnv = liftIO do
diff --git a/hbs2-peer/hbs2-peer.cabal b/hbs2-peer/hbs2-peer.cabal
index 6d1ba6c8..af574dac 100644
--- a/hbs2-peer/hbs2-peer.cabal
+++ b/hbs2-peer/hbs2-peer.cabal
@@ -53,6 +53,7 @@ common common-deps
         , unordered-containers
         , vector
         , interpolatedstring-perl6
+        , filelock
 
 common shared-properties
   ghc-options:
@@ -105,6 +106,7 @@ executable hbs2-peer
     main-is:          PeerMain.hs
 
     other-modules:    BlockDownload
+                    , DownloadQ
                     , Bootstrap
                     , PeerInfo
                     , RPC