From b931bd4ba8841028bb89e23c0119f8159470082a Mon Sep 17 00:00:00 2001
From: voidlizard <dzuikov@gmail.com>
Date: Sun, 23 Feb 2025 10:58:17 +0300
Subject: [PATCH] repo:purge function

---
 hbs2-peer/lib/HBS2/Peer/RPC/Client/RefLog.hs | 91 ++++++++++++++++++++
 1 file changed, 91 insertions(+)
 create mode 100644 hbs2-peer/lib/HBS2/Peer/RPC/Client/RefLog.hs

diff --git a/hbs2-peer/lib/HBS2/Peer/RPC/Client/RefLog.hs b/hbs2-peer/lib/HBS2/Peer/RPC/Client/RefLog.hs
new file mode 100644
index 00000000..d588ba65
--- /dev/null
+++ b/hbs2-peer/lib/HBS2/Peer/RPC/Client/RefLog.hs
@@ -0,0 +1,91 @@
+{-# Language PatternSynonyms #-}
+{-# Language ViewPatterns #-}
+{-# Language AllowAmbiguousTypes #-}
+module HBS2.Peer.RPC.Client.RefLog where
+
+import HBS2.OrDie
+import HBS2.Storage
+import HBS2.Merkle
+import HBS2.Storage.Operations.ByteString
+import HBS2.Data.Types.SignedBox
+
+import HBS2.Peer.Proto.RefLog
+import HBS2.Peer.Prelude
+import HBS2.Peer.RPC.API.RefLog
+import HBS2.Peer.RPC.API.Storage
+import HBS2.Peer.RPC.Client.Internal
+import HBS2.Peer.RPC.Client.StorageClient
+
+import Data.ByteString.Lazy qualified as LBS
+import Data.ByteString (ByteString)
+import Data.Coerce
+import Control.Monad.Except
+import Control.Monad.Trans.Maybe
+import Control.Monad.Trans.Cont
+import Control.Monad.Reader
+import Control.Monad.Identity
+import Codec.Serialise
+import UnliftIO
+
+
+data RefLogClientException =
+  RefLogClientRpcTimeout
+  deriving (Typeable, Show)
+
+instance Exception RefLogClientException
+
+getRefLogValue  :: forall proto m . ( MonadUnliftIO m
+                                    , HasClientAPI RefLogAPI proto m
+                                    , HasProtocol proto (ServiceProto RefLogAPI proto)
+                                    , HasStorage m
+                                    )
+                => PubKey Sign HBS2Basic
+                -> m (Maybe HashRef)
+
+getRefLogValue pk = do
+  api <- getClientAPI @RefLogAPI @proto
+  callRpcWaitMay @RpcRefLogGet (TimeoutSec 1) api pk
+    >>= orThrow RefLogClientRpcTimeout
+
+walkRefLogTx :: forall proto m .  ( MonadUnliftIO m
+                                  , HasClientAPI RefLogAPI proto m
+                                  , HasProtocol proto (ServiceProto RefLogAPI proto)
+                                  , HasStorage m
+                                  , Signatures (Encryption L4Proto)
+                                  , IsRefPubKey (Encryption L4Proto)
+                                  , Serialise (Nonce (RefLogUpdate L4Proto))
+                                  , Serialise (Signature (Encryption L4Proto))
+                                  )
+            => (HashRef -> m Bool)
+            -> PubKey 'Sign 'HBS2Basic
+            -> (HashRef -> ByteString -> m ())
+            -> m ()
+walkRefLogTx filt puk action = do
+  sto <- getStorage
+
+  flip runContT pure $ callCC $ \exit -> do
+
+    rcv' <- lift $ getRefLogValue @proto puk
+
+    rcv <- ContT $ maybe1 rcv' none
+
+    walkMerkle (coerce rcv) (getBlock sto) $ \case
+      -- FIXME: error-handling
+      Left _ -> exit ()
+
+      Right (hs :: [HashRef]) -> do
+        for_ hs $ \h -> do
+          -- want <- lift (filt h)
+          -- when want do
+          lbs' <- getBlock sto (coerce h)
+          lbs  <- ContT $ maybe1 lbs' none
+          RefLogUpdate{..} <- ContT $ maybe1 (unpackRU h lbs) none
+          lift $ action h _refLogUpdData
+
+  where
+    unpackRU h lbs = do
+      deserialiseOrFail @(RefLogUpdate L4Proto) lbs
+       & either (const Nothing) Just
+
+
+