diff --git a/src/index/txindex.cpp b/src/index/txindex.cpp
index 5d37fd0d8f6..4983926e686 100644
--- a/src/index/txindex.cpp
+++ b/src/index/txindex.cpp
@@ -79,7 +79,7 @@ bool TxIndex::FindTx(const uint256& tx_hash, uint256& block_hash, CTransactionRe
         return false;
     }
 
-    CAutoFile file{m_chainstate->m_blockman.OpenBlockFile(postx, true)};
+    AutoFile file{m_chainstate->m_blockman.OpenBlockFile(postx, true)};
     if (file.IsNull()) {
         return error("%s: OpenBlockFile failed", __func__);
     }
diff --git a/src/node/blockstorage.cpp b/src/node/blockstorage.cpp
index c066d1c939f..ebc08d75679 100644
--- a/src/node/blockstorage.cpp
+++ b/src/node/blockstorage.cpp
@@ -4,23 +4,32 @@
 
 #include <node/blockstorage.h>
 
+#include <arith_uint256.h>
 #include <chain.h>
-#include <clientversion.h>
+#include <consensus/params.h>
 #include <consensus/validation.h>
 #include <dbwrapper.h>
 #include <flatfile.h>
 #include <hash.h>
-#include <kernel/chain.h>
+#include <kernel/blockmanager_opts.h>
 #include <kernel/chainparams.h>
 #include <kernel/messagestartchars.h>
+#include <kernel/notifications_interface.h>
 #include <logging.h>
 #include <pow.h>
+#include <primitives/block.h>
+#include <primitives/transaction.h>
 #include <reverse_iterator.h>
+#include <serialize.h>
 #include <signet.h>
+#include <span.h>
 #include <streams.h>
 #include <sync.h>
+#include <tinyformat.h>
+#include <uint256.h>
 #include <undo.h>
 #include <util/batchpriority.h>
+#include <util/check.h>
 #include <util/fs.h>
 #include <util/signalinterrupt.h>
 #include <util/strencodings.h>
@@ -656,7 +665,7 @@ CBlockFileInfo* BlockManager::GetBlockFileInfo(size_t n)
 bool BlockManager::UndoWriteToDisk(const CBlockUndo& blockundo, FlatFilePos& pos, const uint256& hashBlock) const
 {
     // Open history file to append
-    CAutoFile fileout{OpenUndoFile(pos)};
+    AutoFile fileout{OpenUndoFile(pos)};
     if (fileout.IsNull()) {
         return error("%s: OpenUndoFile failed", __func__);
     }
@@ -691,7 +700,7 @@ bool BlockManager::UndoReadFromDisk(CBlockUndo& blockundo, const CBlockIndex& in
     }
 
     // Open history file to read
-    CAutoFile filein{OpenUndoFile(pos, true)};
+    AutoFile filein{OpenUndoFile(pos, true)};
     if (filein.IsNull()) {
         return error("%s: OpenUndoFile failed", __func__);
     }
@@ -810,15 +819,15 @@ FlatFileSeq BlockManager::UndoFileSeq() const
     return FlatFileSeq(m_opts.blocks_dir, "rev", UNDOFILE_CHUNK_SIZE);
 }
 
-CAutoFile BlockManager::OpenBlockFile(const FlatFilePos& pos, bool fReadOnly) const
+AutoFile BlockManager::OpenBlockFile(const FlatFilePos& pos, bool fReadOnly) const
 {
-    return CAutoFile{BlockFileSeq().Open(pos, fReadOnly), CLIENT_VERSION};
+    return AutoFile{BlockFileSeq().Open(pos, fReadOnly)};
 }
 
 /** Open an undo file (rev?????.dat) */
-CAutoFile BlockManager::OpenUndoFile(const FlatFilePos& pos, bool fReadOnly) const
+AutoFile BlockManager::OpenUndoFile(const FlatFilePos& pos, bool fReadOnly) const
 {
-    return CAutoFile{UndoFileSeq().Open(pos, fReadOnly), CLIENT_VERSION};
+    return AutoFile{UndoFileSeq().Open(pos, fReadOnly)};
 }
 
 fs::path BlockManager::GetBlockPosFilename(const FlatFilePos& pos) const
@@ -950,7 +959,7 @@ bool BlockManager::FindUndoPos(BlockValidationState& state, int nFile, FlatFileP
 bool BlockManager::WriteBlockToDisk(const CBlock& block, FlatFilePos& pos) const
 {
     // Open history file to append
-    CAutoFile fileout{OpenBlockFile(pos)};
+    AutoFile fileout{OpenBlockFile(pos)};
     if (fileout.IsNull()) {
         return error("WriteBlockToDisk: OpenBlockFile failed");
     }
@@ -1016,7 +1025,7 @@ bool BlockManager::ReadBlockFromDisk(CBlock& block, const FlatFilePos& pos) cons
     block.SetNull();
 
     // Open history file to read
-    CAutoFile filein{OpenBlockFile(pos, true)};
+    AutoFile filein{OpenBlockFile(pos, true)};
     if (filein.IsNull()) {
         return error("ReadBlockFromDisk: OpenBlockFile failed for %s", pos.ToString());
     }
@@ -1059,7 +1068,7 @@ bool BlockManager::ReadRawBlockFromDisk(std::vector<uint8_t>& block, const FlatF
 {
     FlatFilePos hpos = pos;
     hpos.nPos -= 8; // Seek back 8 bytes for meta header
-    CAutoFile filein{OpenBlockFile(hpos, true)};
+    AutoFile filein{OpenBlockFile(hpos, true)};
     if (filein.IsNull()) {
         return error("%s: OpenBlockFile failed for %s", __func__, pos.ToString());
     }
@@ -1151,7 +1160,7 @@ void ImportBlocks(ChainstateManager& chainman, std::vector<fs::path> vImportFile
                 if (!fs::exists(chainman.m_blockman.GetBlockPosFilename(pos))) {
                     break; // No block files left to reindex
                 }
-                CAutoFile file{chainman.m_blockman.OpenBlockFile(pos, true)};
+                AutoFile file{chainman.m_blockman.OpenBlockFile(pos, true)};
                 if (file.IsNull()) {
                     break; // This error is logged in OpenBlockFile
                 }
@@ -1172,7 +1181,7 @@ void ImportBlocks(ChainstateManager& chainman, std::vector<fs::path> vImportFile
 
         // -loadblock=
         for (const fs::path& path : vImportFiles) {
-            CAutoFile file{fsbridge::fopen(path, "rb"), CLIENT_VERSION};
+            AutoFile file{fsbridge::fopen(path, "rb")};
             if (!file.IsNull()) {
                 LogPrintf("Importing blocks file %s...\n", fs::PathToString(path));
                 chainman.LoadExternalBlockFile(file);
diff --git a/src/node/blockstorage.h b/src/node/blockstorage.h
index ba44d31581c..d540406ae5c 100644
--- a/src/node/blockstorage.h
+++ b/src/node/blockstorage.h
@@ -8,21 +8,26 @@
 #include <attributes.h>
 #include <chain.h>
 #include <dbwrapper.h>
+#include <flatfile.h>
 #include <kernel/blockmanager_opts.h>
-#include <kernel/chain.h>
 #include <kernel/chainparams.h>
 #include <kernel/cs_main.h>
 #include <kernel/messagestartchars.h>
+#include <primitives/block.h>
+#include <streams.h>
 #include <sync.h>
+#include <uint256.h>
 #include <util/fs.h>
 #include <util/hasher.h>
 
+#include <array>
 #include <atomic>
 #include <cstdint>
 #include <functional>
 #include <limits>
 #include <map>
 #include <memory>
+#include <optional>
 #include <set>
 #include <string>
 #include <unordered_map>
@@ -30,14 +35,9 @@
 #include <vector>
 
 class BlockValidationState;
-class CAutoFile;
-class CBlock;
 class CBlockUndo;
-class CChainParams;
 class Chainstate;
 class ChainstateManager;
-struct CCheckpointData;
-struct FlatFilePos;
 namespace Consensus {
 struct Params;
 }
@@ -162,7 +162,7 @@ private:
     FlatFileSeq BlockFileSeq() const;
     FlatFileSeq UndoFileSeq() const;
 
-    CAutoFile OpenUndoFile(const FlatFilePos& pos, bool fReadOnly = false) const;
+    AutoFile OpenUndoFile(const FlatFilePos& pos, bool fReadOnly = false) const;
 
     bool WriteBlockToDisk(const CBlock& block, FlatFilePos& pos) const;
     bool UndoWriteToDisk(const CBlockUndo& blockundo, FlatFilePos& pos, const uint256& hashBlock) const;
@@ -350,7 +350,7 @@ public:
     void UpdatePruneLock(const std::string& name, const PruneLockInfo& lock_info) EXCLUSIVE_LOCKS_REQUIRED(::cs_main);
 
     /** Open a block file (blk?????.dat) */
-    CAutoFile OpenBlockFile(const FlatFilePos& pos, bool fReadOnly = false) const;
+    AutoFile OpenBlockFile(const FlatFilePos& pos, bool fReadOnly = false) const;
 
     /** Translation to a filesystem path */
     fs::path GetBlockPosFilename(const FlatFilePos& pos) const;
diff --git a/src/test/fuzz/load_external_block_file.cpp b/src/test/fuzz/load_external_block_file.cpp
index ae4f5d089b6..6460261f0f5 100644
--- a/src/test/fuzz/load_external_block_file.cpp
+++ b/src/test/fuzz/load_external_block_file.cpp
@@ -28,7 +28,7 @@ FUZZ_TARGET(load_external_block_file, .init = initialize_load_external_block_fil
 {
     FuzzedDataProvider fuzzed_data_provider{buffer.data(), buffer.size()};
     FuzzedFileProvider fuzzed_file_provider{fuzzed_data_provider};
-    CAutoFile fuzzed_block_file{fuzzed_file_provider.open(), CLIENT_VERSION};
+    AutoFile fuzzed_block_file{fuzzed_file_provider.open()};
     if (fuzzed_block_file.IsNull()) {
         return;
     }
diff --git a/src/validation.cpp b/src/validation.cpp
index ed72a7c97a6..728a049f890 100644
--- a/src/validation.cpp
+++ b/src/validation.cpp
@@ -4649,7 +4649,7 @@ bool Chainstate::LoadGenesisBlock()
 }
 
 void ChainstateManager::LoadExternalBlockFile(
-    CAutoFile& file_in,
+    AutoFile& file_in,
     FlatFilePos* dbp,
     std::multimap<uint256, FlatFilePos>* blocks_with_unknown_parent)
 {
diff --git a/src/validation.h b/src/validation.h
index e669ec46d5d..7473bcbc3ba 100644
--- a/src/validation.h
+++ b/src/validation.h
@@ -1137,7 +1137,7 @@ public:
      *                                              (only used for reindex)
      * */
     void LoadExternalBlockFile(
-        CAutoFile& file_in,
+        AutoFile& file_in,
         FlatFilePos* dbp = nullptr,
         std::multimap<uint256, FlatFilePos>* blocks_with_unknown_parent = nullptr);