Remove unused GetType() from CBufferedFile and CAutoFile

GetType() is only called in tests, so it is unused and can be removed.

src/bench/streams_findbyte.cpp

@@ -16,7 +16,7 @@ static void FindByte(benchmark::Bench& bench)
     data[file_size-1] = 1;
     fwrite(&data, sizeof(uint8_t), file_size, file);
     rewind(file);
-    CBufferedFile bf(file, /*nBufSize=*/file_size + 1, /*nRewindIn=*/file_size, 0, 0);
+    CBufferedFile bf{file, /*nBufSize=*/file_size + 1, /*nRewindIn=*/file_size, 0};
 
     bench.run([&] {
         bf.SetPos(0);

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), SER_DISK, CLIENT_VERSION);
+    CAutoFile file{m_chainstate->m_blockman.OpenBlockFile(postx, true), CLIENT_VERSION};
     if (file.IsNull()) {
         return error("%s: OpenBlockFile failed", __func__);
     }

src/kernel/mempool_persist.cpp

@@ -41,7 +41,7 @@ bool LoadMempool(CTxMemPool& pool, const fs::path& load_path, Chainstate& active
     if (load_path.empty()) return false;
 
     FILE* filestr{opts.mockable_fopen_function(load_path, "rb")};
-    CAutoFile file(filestr, SER_DISK, CLIENT_VERSION);
+    CAutoFile file{filestr, CLIENT_VERSION};
     if (file.IsNull()) {
         LogPrintf("Failed to open mempool file from disk. Continuing anyway.\n");
         return false;
@@ -157,7 +157,7 @@ bool DumpMempool(const CTxMemPool& pool, const fs::path& dump_path, FopenFn mock
             return false;
         }
 
-        CAutoFile file(filestr, SER_DISK, CLIENT_VERSION);
+        CAutoFile file{filestr, CLIENT_VERSION};
 
         uint64_t version = MEMPOOL_DUMP_VERSION;
         file << version;

src/node/blockstorage.cpp

@@ -822,7 +822,7 @@ 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), SER_DISK, CLIENT_VERSION);
+    CAutoFile fileout{OpenBlockFile(pos), CLIENT_VERSION};
     if (fileout.IsNull()) {
         return error("WriteBlockToDisk: OpenBlockFile failed");
     }
@@ -878,7 +878,7 @@ bool BlockManager::ReadBlockFromDisk(CBlock& block, const FlatFilePos& pos) cons
     block.SetNull();
 
     // Open history file to read
-    CAutoFile filein(OpenBlockFile(pos, true), SER_DISK, CLIENT_VERSION);
+    CAutoFile filein{OpenBlockFile(pos, true), CLIENT_VERSION};
     if (filein.IsNull()) {
         return error("ReadBlockFromDisk: OpenBlockFile failed for %s", pos.ToString());
     }

src/streams.h

@@ -550,12 +550,10 @@ public:
 class CAutoFile : public AutoFile
 {
 private:
-    const int nType;
     const int nVersion;
 
 public:
-    explicit CAutoFile(std::FILE* file, int type, int version, std::vector<std::byte> data_xor = {}) : AutoFile{file, std::move(data_xor)}, nType{type}, nVersion{version} {}
+    explicit CAutoFile(std::FILE* file, int version, std::vector<std::byte> data_xor = {}) : AutoFile{file, std::move(data_xor)}, nVersion{version} {}
-    int GetType() const          { return nType; }
     int GetVersion() const       { return nVersion; }
 
     template<typename T>
@@ -582,7 +580,6 @@ public:
 class CBufferedFile
 {
 private:
-    const int nType;
     const int nVersion;
 
     FILE *src;            //!< source file
@@ -632,8 +629,8 @@ private:
     }
 
 public:
-    CBufferedFile(FILE* fileIn, uint64_t nBufSize, uint64_t nRewindIn, int nTypeIn, int nVersionIn)
+    CBufferedFile(FILE* fileIn, uint64_t nBufSize, uint64_t nRewindIn, int nVersionIn)
-        : nType(nTypeIn), nVersion(nVersionIn), nReadLimit(std::numeric_limits<uint64_t>::max()), nRewind(nRewindIn), vchBuf(nBufSize, std::byte{0})
+        : nVersion{nVersionIn}, nReadLimit{std::numeric_limits<uint64_t>::max()}, nRewind{nRewindIn}, vchBuf(nBufSize, std::byte{0})
     {
         if (nRewindIn >= nBufSize)
             throw std::ios_base::failure("Rewind limit must be less than buffer size");
@@ -650,7 +647,6 @@ public:
     CBufferedFile& operator=(const CBufferedFile&) = delete;
 
     int GetVersion() const { return nVersion; }
-    int GetType() const { return nType; }
 
     void fclose()
     {

src/test/fuzz/buffered_file.cpp

@@ -21,7 +21,7 @@ FUZZ_TARGET(buffered_file)
     std::optional<CBufferedFile> opt_buffered_file;
     FILE* fuzzed_file = fuzzed_file_provider.open();
     try {
-        opt_buffered_file.emplace(fuzzed_file, fuzzed_data_provider.ConsumeIntegralInRange<uint64_t>(0, 4096), fuzzed_data_provider.ConsumeIntegralInRange<uint64_t>(0, 4096), fuzzed_data_provider.ConsumeIntegral<int>(), fuzzed_data_provider.ConsumeIntegral<int>());
+        opt_buffered_file.emplace(fuzzed_file, fuzzed_data_provider.ConsumeIntegralInRange<uint64_t>(0, 4096), fuzzed_data_provider.ConsumeIntegralInRange<uint64_t>(0, 4096), fuzzed_data_provider.ConsumeIntegral<int>());
     } catch (const std::ios_base::failure&) {
         if (fuzzed_file != nullptr) {
             fclose(fuzzed_file);
@@ -62,7 +62,6 @@ FUZZ_TARGET(buffered_file)
                 });
         }
         opt_buffered_file->GetPos();
-        opt_buffered_file->GetType();
         opt_buffered_file->GetVersion();
     }
 }

src/test/streams_tests.cpp

@@ -260,7 +260,7 @@ BOOST_AUTO_TEST_CASE(streams_buffered_file)
     // The buffer size (second arg) must be greater than the rewind
     // amount (third arg).
     try {
-        CBufferedFile bfbad(file, 25, 25, 222, 333);
+        CBufferedFile bfbad{file, 25, 25, 333};
         BOOST_CHECK(false);
     } catch (const std::exception& e) {
         BOOST_CHECK(strstr(e.what(),
@@ -268,11 +268,10 @@ BOOST_AUTO_TEST_CASE(streams_buffered_file)
     }
 
     // The buffer is 25 bytes, allow rewinding 10 bytes.
-    CBufferedFile bf(file, 25, 10, 222, 333);
+    CBufferedFile bf{file, 25, 10, 333};
     BOOST_CHECK(!bf.eof());
 
-    // These two members have no functional effect.
+    // This member has no functional effect.
-    BOOST_CHECK_EQUAL(bf.GetType(), 222);
     BOOST_CHECK_EQUAL(bf.GetVersion(), 333);
 
     uint8_t i;
@@ -392,7 +391,7 @@ BOOST_AUTO_TEST_CASE(streams_buffered_file_skip)
     rewind(file);
 
     // The buffer is 25 bytes, allow rewinding 10 bytes.
-    CBufferedFile bf(file, 25, 10, 222, 333);
+    CBufferedFile bf{file, 25, 10, 333};
 
     uint8_t i;
     // This is like bf >> (7-byte-variable), in that it will cause data
@@ -446,7 +445,7 @@ BOOST_AUTO_TEST_CASE(streams_buffered_file_rand)
 
         size_t bufSize = InsecureRandRange(300) + 1;
         size_t rewindSize = InsecureRandRange(bufSize);
-        CBufferedFile bf(file, bufSize, rewindSize, 222, 333);
+        CBufferedFile bf{file, bufSize, rewindSize, 333};
         size_t currentPos = 0;
         size_t maxPos = 0;
         for (int step = 0; step < 100; ++step) {

src/validation.cpp

@@ -4520,7 +4520,7 @@ void ChainstateManager::LoadExternalBlockFile(
     int nLoaded = 0;
     try {
         // This takes over fileIn and calls fclose() on it in the CBufferedFile destructor
-        CBufferedFile blkdat(fileIn, 2*MAX_BLOCK_SERIALIZED_SIZE, MAX_BLOCK_SERIALIZED_SIZE+8, SER_DISK, CLIENT_VERSION);
+        CBufferedFile blkdat{fileIn, 2 * MAX_BLOCK_SERIALIZED_SIZE, MAX_BLOCK_SERIALIZED_SIZE + 8, CLIENT_VERSION};
         // nRewind indicates where to resume scanning in case something goes wrong,
         // such as a block fails to deserialize.
         uint64_t nRewind = blkdat.GetPos();