Merge pull request #6873

7 files changed, 85 insertions, 89 deletions

diff --git a/src/Makefile.am b/src/Makefile.am
index 0a16a863eb..312643cec3 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -110,7 +110,7 @@ BITCOIN_CORE_H = \
   init.h \
   key.h \
   keystore.h \
-  leveldbwrapper.h \
+  dbwrapper.h \
   limitedmap.h \
   main.h \
   memusage.h \
@@ -188,7 +188,7 @@ libbitcoin_server_a_SOURCES = \
   httprpc.cpp \
   httpserver.cpp \
   init.cpp \
-  leveldbwrapper.cpp \
+  dbwrapper.cpp \
   main.cpp \
   merkleblock.cpp \
   miner.cpp \
diff --git a/src/Makefile.test.include b/src/Makefile.test.include
index 0fe8ea42ff..f23a8f41fc 100644
--- a/src/Makefile.test.include
+++ b/src/Makefile.test.include
@@ -54,7 +54,7 @@ BITCOIN_TESTS =\
   test/hash_tests.cpp \
   test/key_tests.cpp \
   test/limitedmap_tests.cpp \
-  test/leveldbwrapper_tests.cpp \
+  test/dbwrapper_tests.cpp \
   test/main_tests.cpp \
   test/mempool_tests.cpp \
   test/miner_tests.cpp \
diff --git a/src/leveldbwrapper.cpp b/src/dbwrapper.cpp
index 32c9345be5..b6307cf0bf 100644
--- a/src/leveldbwrapper.cpp
+++ b/src/dbwrapper.cpp
@@ -2,7 +2,7 @@
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
-#include "leveldbwrapper.h"
+#include "dbwrapper.h"
 
 #include "util.h"
 #include "random.h"
@@ -15,18 +15,18 @@
 #include <memenv.h>
 #include <stdint.h>
 
-void HandleError(const leveldb::Status& status) throw(leveldb_error)
+void HandleError(const leveldb::Status& status) throw(dbwrapper_error)
 {
     if (status.ok())
         return;
     LogPrintf("%s\n", status.ToString());
     if (status.IsCorruption())
-        throw leveldb_error("Database corrupted");
+        throw dbwrapper_error("Database corrupted");
     if (status.IsIOError())
-        throw leveldb_error("Database I/O error");
+        throw dbwrapper_error("Database I/O error");
     if (status.IsNotFound())
-        throw leveldb_error("Database entry missing");
-    throw leveldb_error("Unknown database error");
+        throw dbwrapper_error("Database entry missing");
+    throw dbwrapper_error("Unknown database error");
 }
 
 static leveldb::Options GetOptions(size_t nCacheSize)
@@ -45,7 +45,7 @@ static leveldb::Options GetOptions(size_t nCacheSize)
     return options;
 }
 
-CLevelDBWrapper::CLevelDBWrapper(const boost::filesystem::path& path, size_t nCacheSize, bool fMemory, bool fWipe, bool obfuscate)
+CDBWrapper::CDBWrapper(const boost::filesystem::path& path, size_t nCacheSize, bool fMemory, bool fWipe, bool obfuscate)
 {
     penv = NULL;
     readoptions.verify_checksums = true;
@@ -76,7 +76,7 @@ CLevelDBWrapper::CLevelDBWrapper(const boost::filesystem::path& path, size_t nCa
     bool key_exists = Read(OBFUSCATE_KEY_KEY, obfuscate_key);
 
     if (!key_exists && obfuscate && IsEmpty()) {
-        // Initialize non-degenerate obfuscation if it won't upset 
+        // Initialize non-degenerate obfuscation if it won't upset
         // existing, non-obfuscated data.
         std::vector<unsigned char> new_key = CreateObfuscateKey();
 
@@ -90,7 +90,7 @@ CLevelDBWrapper::CLevelDBWrapper(const boost::filesystem::path& path, size_t nCa
     LogPrintf("Using obfuscation key for %s: %s\n", path.string(), GetObfuscateKeyHex());
 }
 
-CLevelDBWrapper::~CLevelDBWrapper()
+CDBWrapper::~CDBWrapper()
 {
     delete pdb;
     pdb = NULL;
@@ -102,7 +102,7 @@ CLevelDBWrapper::~CLevelDBWrapper()
     options.env = NULL;
 }
 
-bool CLevelDBWrapper::WriteBatch(CLevelDBBatch& batch, bool fSync) throw(leveldb_error)
+bool CDBWrapper::WriteBatch(CDBBatch& batch, bool fSync) throw(dbwrapper_error)
 {
     leveldb::Status status = pdb->Write(fSync ? syncoptions : writeoptions, &batch.batch);
     HandleError(status);
@@ -113,15 +113,15 @@ bool CLevelDBWrapper::WriteBatch(CLevelDBBatch& batch, bool fSync) throw(leveldb
 //
 // We must use a string constructor which specifies length so that we copy
 // past the null-terminator.
-const std::string CLevelDBWrapper::OBFUSCATE_KEY_KEY("\000obfuscate_key", 14);
+const std::string CDBWrapper::OBFUSCATE_KEY_KEY("\000obfuscate_key", 14);
 
-const unsigned int CLevelDBWrapper::OBFUSCATE_KEY_NUM_BYTES = 8;
+const unsigned int CDBWrapper::OBFUSCATE_KEY_NUM_BYTES = 8;
 
 /**
- * Returns a string (consisting of 8 random bytes) suitable for use as an 
- * obfuscating XOR key. 
+ * Returns a string (consisting of 8 random bytes) suitable for use as an
+ * obfuscating XOR key.
  */
-std::vector<unsigned char> CLevelDBWrapper::CreateObfuscateKey() const 
+std::vector<unsigned char> CDBWrapper::CreateObfuscateKey() const
 {
     unsigned char buff[OBFUSCATE_KEY_NUM_BYTES];
     GetRandBytes(buff, OBFUSCATE_KEY_NUM_BYTES);
@@ -129,26 +129,24 @@ std::vector<unsigned char> CLevelDBWrapper::CreateObfuscateKey() const
 
 }
 
-bool CLevelDBWrapper::IsEmpty()
+bool CDBWrapper::IsEmpty()
 {
-    boost::scoped_ptr<CLevelDBIterator> it(NewIterator());
+    boost::scoped_ptr<CDBIterator> it(NewIterator());
     it->SeekToFirst();
     return !(it->Valid());
 }
 
-const std::vector<unsigned char>& CLevelDBWrapper::GetObfuscateKey() const 
-{ 
-    return obfuscate_key; 
+const std::vector<unsigned char>& CDBWrapper::GetObfuscateKey() const
+{
+    return obfuscate_key;
 }
 
-std::string CLevelDBWrapper::GetObfuscateKeyHex() const
-{ 
-    return HexStr(obfuscate_key); 
+std::string CDBWrapper::GetObfuscateKeyHex() const
+{
+    return HexStr(obfuscate_key);
 }
 
-CLevelDBIterator::~CLevelDBIterator() { delete piter; }
-bool CLevelDBIterator::Valid() { return piter->Valid(); }
-void CLevelDBIterator::SeekToFirst() { piter->SeekToFirst(); }
-void CLevelDBIterator::SeekToLast() { piter->SeekToLast(); }
-void CLevelDBIterator::Next() { piter->Next(); }
-void CLevelDBIterator::Prev() { piter->Prev(); }
+CDBIterator::~CDBIterator() { delete piter; }
+bool CDBIterator::Valid() { return piter->Valid(); }
+void CDBIterator::SeekToFirst() { piter->SeekToFirst(); }
+void CDBIterator::Next() { piter->Next(); }
diff --git a/src/leveldbwrapper.h b/src/dbwrapper.h
index 60101e18cc..aa28767508 100644
--- a/src/leveldbwrapper.h
+++ b/src/dbwrapper.h
@@ -2,8 +2,8 @@
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
-#ifndef BITCOIN_LEVELDBWRAPPER_H
-#define BITCOIN_LEVELDBWRAPPER_H
+#ifndef BITCOIN_DBWRAPPER_H
+#define BITCOIN_DBWRAPPER_H
 
 #include "clientversion.h"
 #include "serialize.h"
@@ -17,18 +17,18 @@
 #include <leveldb/db.h>
 #include <leveldb/write_batch.h>
 
-class leveldb_error : public std::runtime_error
+class dbwrapper_error : public std::runtime_error
 {
 public:
-    leveldb_error(const std::string& msg) : std::runtime_error(msg) {}
+    dbwrapper_error(const std::string& msg) : std::runtime_error(msg) {}
 };
 
-void HandleError(const leveldb::Status& status) throw(leveldb_error);
+void HandleError(const leveldb::Status& status) throw(dbwrapper_error);
 
-/** Batch of changes queued to be written to a CLevelDBWrapper */
-class CLevelDBBatch
+/** Batch of changes queued to be written to a CDBWrapper */
+class CDBBatch
 {
-    friend class CLevelDBWrapper;
+    friend class CDBWrapper;
 
 private:
     leveldb::WriteBatch batch;
@@ -38,7 +38,7 @@ public:
     /**
      * @param[in] obfuscate_key    If passed, XOR data with this key.
      */
-    CLevelDBBatch(const std::vector<unsigned char> *obfuscate_key) : obfuscate_key(obfuscate_key) { };
+    CDBBatch(const std::vector<unsigned char> *obfuscate_key) : obfuscate_key(obfuscate_key) { };
 
     template <typename K, typename V>
     void Write(const K& key, const V& value)
@@ -68,8 +68,8 @@ public:
         batch.Delete(slKey);
     }
 };
- 
-class CLevelDBIterator
+
+class CDBIterator
 {
 private:
     leveldb::Iterator *piter;
@@ -81,14 +81,13 @@ public:
      * @param[in] piterIn          The original leveldb iterator.
      * @param[in] obfuscate_key    If passed, XOR data with this key.
      */
-    CLevelDBIterator(leveldb::Iterator *piterIn, const std::vector<unsigned char>* obfuscate_key) :
+    CDBIterator(leveldb::Iterator *piterIn, const std::vector<unsigned char>* obfuscate_key) :
         piter(piterIn), obfuscate_key(obfuscate_key) { };
-    ~CLevelDBIterator();
+    ~CDBIterator();
 
     bool Valid();
 
     void SeekToFirst();
-    void SeekToLast();
 
     template<typename K> void Seek(const K& key) {
         CDataStream ssKey(SER_DISK, CLIENT_VERSION);
@@ -99,7 +98,6 @@ public:
     }
 
     void Next();
-    void Prev();
 
     template<typename K> bool GetKey(K& key) {
         leveldb::Slice slKey = piter->key();
@@ -133,8 +131,8 @@ public:
     }
 
 };
- 
-class CLevelDBWrapper
+
+class CDBWrapper
 {
 private:
     //! custom environment this database is using (may be NULL in case of default environment)
@@ -163,10 +161,10 @@ private:
 
     //! the key under which the obfuscation key is stored
     static const std::string OBFUSCATE_KEY_KEY;
-    
+
     //! the length of the obfuscate key in number of bytes
     static const unsigned int OBFUSCATE_KEY_NUM_BYTES;
-    
+
     std::vector<unsigned char> CreateObfuscateKey() const;
 
 public:
@@ -178,11 +176,11 @@ public:
      * @param[in] obfuscate   If true, store data obfuscated via simple XOR. If false, XOR
      *                        with a zero'd byte array.
      */
-    CLevelDBWrapper(const boost::filesystem::path& path, size_t nCacheSize, bool fMemory = false, bool fWipe = false, bool obfuscate = false);
-    ~CLevelDBWrapper();
+    CDBWrapper(const boost::filesystem::path& path, size_t nCacheSize, bool fMemory = false, bool fWipe = false, bool obfuscate = false);
+    ~CDBWrapper();
 
     template <typename K, typename V>
-    bool Read(const K& key, V& value) const throw(leveldb_error)
+    bool Read(const K& key, V& value) const throw(dbwrapper_error)
     {
         CDataStream ssKey(SER_DISK, CLIENT_VERSION);
         ssKey.reserve(ssKey.GetSerializeSize(key));
@@ -208,15 +206,15 @@ public:
     }
 
     template <typename K, typename V>
-    bool Write(const K& key, const V& value, bool fSync = false) throw(leveldb_error)
+    bool Write(const K& key, const V& value, bool fSync = false) throw(dbwrapper_error)
     {
-        CLevelDBBatch batch(&obfuscate_key);
+        CDBBatch batch(&obfuscate_key);
         batch.Write(key, value);
         return WriteBatch(batch, fSync);
     }
 
     template <typename K>
-    bool Exists(const K& key) const throw(leveldb_error)
+    bool Exists(const K& key) const throw(dbwrapper_error)
     {
         CDataStream ssKey(SER_DISK, CLIENT_VERSION);
         ssKey.reserve(ssKey.GetSerializeSize(key));
@@ -235,14 +233,14 @@ public:
     }
 
     template <typename K>
-    bool Erase(const K& key, bool fSync = false) throw(leveldb_error)
+    bool Erase(const K& key, bool fSync = false) throw(dbwrapper_error)
     {
-        CLevelDBBatch batch(&obfuscate_key);
+        CDBBatch batch(&obfuscate_key);
         batch.Erase(key);
         return WriteBatch(batch, fSync);
     }
 
-    bool WriteBatch(CLevelDBBatch& batch, bool fSync = false) throw(leveldb_error);
+    bool WriteBatch(CDBBatch& batch, bool fSync = false) throw(dbwrapper_error);
 
     // not available for LevelDB; provide for compatibility with BDB
     bool Flush()
@@ -250,15 +248,15 @@ public:
         return true;
     }
 
-    bool Sync() throw(leveldb_error)
+    bool Sync() throw(dbwrapper_error)
     {
-        CLevelDBBatch batch(&obfuscate_key);
+        CDBBatch batch(&obfuscate_key);
         return WriteBatch(batch, true);
     }
 
-    CLevelDBIterator *NewIterator() 
+    CDBIterator *NewIterator()
     {
-        return new CLevelDBIterator(pdb->NewIterator(iteroptions), &obfuscate_key);
+        return new CDBIterator(pdb->NewIterator(iteroptions), &obfuscate_key);
     }
 
     /**
@@ -278,5 +276,5 @@ public:
 
 };
 
-#endif // BITCOIN_LEVELDBWRAPPER_H
+#endif // BITCOIN_DBWRAPPER_H
 
diff --git a/src/test/leveldbwrapper_tests.cpp b/src/test/dbwrapper_tests.cpp
index 606313b004..8b6b0697ab 100644
--- a/src/test/leveldbwrapper_tests.cpp
+++ b/src/test/dbwrapper_tests.cpp
@@ -2,7 +2,7 @@
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
-#include "leveldbwrapper.h"
+#include "dbwrapper.h"
 #include "uint256.h"
 #include "random.h"
 #include "test/test_bitcoin.h"
@@ -25,15 +25,15 @@ bool is_null_key(const vector<unsigned char>& key) {
     return isnull;
 }
  
-BOOST_FIXTURE_TEST_SUITE(leveldbwrapper_tests, BasicTestingSetup)
+BOOST_FIXTURE_TEST_SUITE(dbwrapper_tests, BasicTestingSetup)
                        
-BOOST_AUTO_TEST_CASE(leveldbwrapper)
+BOOST_AUTO_TEST_CASE(dbwrapper)
 {
     // Perform tests both obfuscated and non-obfuscated.
     for (int i = 0; i < 2; i++) {
         bool obfuscate = (bool)i;
         path ph = temp_directory_path() / unique_path();
-        CLevelDBWrapper dbw(ph, (1 << 20), true, false, obfuscate);
+        CDBWrapper dbw(ph, (1 << 20), true, false, obfuscate);
         char key = 'k';
         uint256 in = GetRandHash();
         uint256 res;
@@ -48,13 +48,13 @@ BOOST_AUTO_TEST_CASE(leveldbwrapper)
 }
 
 // Test batch operations
-BOOST_AUTO_TEST_CASE(leveldbwrapper_batch)
+BOOST_AUTO_TEST_CASE(dbwrapper_batch)
 {
     // Perform tests both obfuscated and non-obfuscated.
     for (int i = 0; i < 2; i++) {
         bool obfuscate = (bool)i;
         path ph = temp_directory_path() / unique_path();
-        CLevelDBWrapper dbw(ph, (1 << 20), true, false, obfuscate);
+        CDBWrapper dbw(ph, (1 << 20), true, false, obfuscate);
 
         char key = 'i';
         uint256 in = GetRandHash();
@@ -64,7 +64,7 @@ BOOST_AUTO_TEST_CASE(leveldbwrapper_batch)
         uint256 in3 = GetRandHash();
 
         uint256 res;
-        CLevelDBBatch batch(&dbw.GetObfuscateKey());
+        CDBBatch batch(&dbw.GetObfuscateKey());
 
         batch.Write(key, in);
         batch.Write(key2, in2);
@@ -85,13 +85,13 @@ BOOST_AUTO_TEST_CASE(leveldbwrapper_batch)
     }
 }
 
-BOOST_AUTO_TEST_CASE(leveldbwrapper_iterator)
+BOOST_AUTO_TEST_CASE(dbwrapper_iterator)
 {
     // Perform tests both obfuscated and non-obfuscated.
     for (int i = 0; i < 2; i++) {
         bool obfuscate = (bool)i;
         path ph = temp_directory_path() / unique_path();
-        CLevelDBWrapper dbw(ph, (1 << 20), true, false, obfuscate);
+        CDBWrapper dbw(ph, (1 << 20), true, false, obfuscate);
 
         // The two keys are intentionally chosen for ordering
         char key = 'j';
@@ -101,7 +101,7 @@ BOOST_AUTO_TEST_CASE(leveldbwrapper_iterator)
         uint256 in2 = GetRandHash();
         BOOST_CHECK(dbw.Write(key2, in2));
 
-        boost::scoped_ptr<CLevelDBIterator> it(const_cast<CLevelDBWrapper*>(&dbw)->NewIterator());
+        boost::scoped_ptr<CDBIterator> it(const_cast<CDBWrapper*>(&dbw)->NewIterator());
 
         // Be sure to seek past the obfuscation key (if it exists)
         it->Seek(key);
@@ -134,7 +134,7 @@ BOOST_AUTO_TEST_CASE(existing_data_no_obfuscate)
     create_directories(ph);
 
     // Set up a non-obfuscated wrapper to write some initial data.
-    CLevelDBWrapper* dbw = new CLevelDBWrapper(ph, (1 << 10), false, false, false);
+    CDBWrapper* dbw = new CDBWrapper(ph, (1 << 10), false, false, false);
     char key = 'k';
     uint256 in = GetRandHash();
     uint256 res;
@@ -147,7 +147,7 @@ BOOST_AUTO_TEST_CASE(existing_data_no_obfuscate)
     delete dbw;
 
     // Now, set up another wrapper that wants to obfuscate the same directory
-    CLevelDBWrapper odbw(ph, (1 << 10), false, false, true);
+    CDBWrapper odbw(ph, (1 << 10), false, false, true);
 
     // Check that the key/val we wrote with unobfuscated wrapper exists and 
     // is readable.
@@ -175,7 +175,7 @@ BOOST_AUTO_TEST_CASE(existing_data_reindex)
     create_directories(ph);
 
     // Set up a non-obfuscated wrapper to write some initial data.
-    CLevelDBWrapper* dbw = new CLevelDBWrapper(ph, (1 << 10), false, false, false);
+    CDBWrapper* dbw = new CDBWrapper(ph, (1 << 10), false, false, false);
     char key = 'k';
     uint256 in = GetRandHash();
     uint256 res;
@@ -188,7 +188,7 @@ BOOST_AUTO_TEST_CASE(existing_data_reindex)
     delete dbw;
 
     // Simulate a -reindex by wiping the existing data store
-    CLevelDBWrapper odbw(ph, (1 << 10), false, true, true);
+    CDBWrapper odbw(ph, (1 << 10), false, true, true);
 
     // Check that the key/val we wrote with unobfuscated wrapper doesn't exist
     uint256 res2;
diff --git a/src/txdb.cpp b/src/txdb.cpp
index a441aea688..f0868a1ebf 100644
--- a/src/txdb.cpp
+++ b/src/txdb.cpp
@@ -49,7 +49,7 @@ uint256 CCoinsViewDB::GetBestBlock() const {
 }
 
 bool CCoinsViewDB::BatchWrite(CCoinsMap &mapCoins, const uint256 &hashBlock) {
-    CLevelDBBatch batch(&db.GetObfuscateKey());
+    CDBBatch batch(&db.GetObfuscateKey());
     size_t count = 0;
     size_t changed = 0;
     for (CCoinsMap::iterator it = mapCoins.begin(); it != mapCoins.end();) {
@@ -71,7 +71,7 @@ bool CCoinsViewDB::BatchWrite(CCoinsMap &mapCoins, const uint256 &hashBlock) {
     return db.WriteBatch(batch);
 }
 
-CBlockTreeDB::CBlockTreeDB(size_t nCacheSize, bool fMemory, bool fWipe) : CLevelDBWrapper(GetDataDir() / "blocks" / "index", nCacheSize, fMemory, fWipe) {
+CBlockTreeDB::CBlockTreeDB(size_t nCacheSize, bool fMemory, bool fWipe) : CDBWrapper(GetDataDir() / "blocks" / "index", nCacheSize, fMemory, fWipe) {
 }
 
 bool CBlockTreeDB::ReadBlockFileInfo(int nFile, CBlockFileInfo &info) {
@@ -98,7 +98,7 @@ bool CCoinsViewDB::GetStats(CCoinsStats &stats) const {
     /* It seems that there are no "const iterators" for LevelDB.  Since we
        only need read operations on it, use a const-cast to get around
        that restriction.  */
-    boost::scoped_ptr<CLevelDBIterator> pcursor(const_cast<CLevelDBWrapper*>(&db)->NewIterator());
+    boost::scoped_ptr<CDBIterator> pcursor(const_cast<CDBWrapper*>(&db)->NewIterator());
     pcursor->Seek(DB_COINS);
 
     CHashWriter ss(SER_GETHASH, PROTOCOL_VERSION);
@@ -141,7 +141,7 @@ bool CCoinsViewDB::GetStats(CCoinsStats &stats) const {
 }
 
 bool CBlockTreeDB::WriteBatchSync(const std::vector<std::pair<int, const CBlockFileInfo*> >& fileInfo, int nLastFile, const std::vector<const CBlockIndex*>& blockinfo) {
-    CLevelDBBatch batch(&GetObfuscateKey());
+    CDBBatch batch(&GetObfuscateKey());
     for (std::vector<std::pair<int, const CBlockFileInfo*> >::const_iterator it=fileInfo.begin(); it != fileInfo.end(); it++) {
         batch.Write(make_pair(DB_BLOCK_FILES, it->first), *it->second);
     }
@@ -157,7 +157,7 @@ bool CBlockTreeDB::ReadTxIndex(const uint256 &txid, CDiskTxPos &pos) {
 }
 
 bool CBlockTreeDB::WriteTxIndex(const std::vector<std::pair<uint256, CDiskTxPos> >&vect) {
-    CLevelDBBatch batch(&GetObfuscateKey());
+    CDBBatch batch(&GetObfuscateKey());
     for (std::vector<std::pair<uint256,CDiskTxPos> >::const_iterator it=vect.begin(); it!=vect.end(); it++)
         batch.Write(make_pair(DB_TXINDEX, it->first), it->second);
     return WriteBatch(batch);
@@ -177,7 +177,7 @@ bool CBlockTreeDB::ReadFlag(const std::string &name, bool &fValue) {
 
 bool CBlockTreeDB::LoadBlockIndexGuts()
 {
-    boost::scoped_ptr<CLevelDBIterator> pcursor(NewIterator());
+    boost::scoped_ptr<CDBIterator> pcursor(NewIterator());
 
     pcursor->Seek(make_pair(DB_BLOCK_INDEX, uint256()));
 
diff --git a/src/txdb.h b/src/txdb.h
index bef5dc9fd1..586ab55d0d 100644
--- a/src/txdb.h
+++ b/src/txdb.h
@@ -7,7 +7,7 @@
 #define BITCOIN_TXDB_H
 
 #include "coins.h"
-#include "leveldbwrapper.h"
+#include "dbwrapper.h"
 
 #include <map>
 #include <string>
@@ -26,11 +26,11 @@ static const int64_t nMaxDbCache = sizeof(void*) > 4 ? 16384 : 1024;
 //! min. -dbcache in (MiB)
 static const int64_t nMinDbCache = 4;
 
-/** CCoinsView backed by the LevelDB coin database (chainstate/) */
+/** CCoinsView backed by the coin database (chainstate/) */
 class CCoinsViewDB : public CCoinsView
 {
 protected:
-    CLevelDBWrapper db;
+    CDBWrapper db;
 public:
     CCoinsViewDB(size_t nCacheSize, bool fMemory = false, bool fWipe = false);
 
@@ -42,7 +42,7 @@ public:
 };
 
 /** Access to the block database (blocks/index/) */
-class CBlockTreeDB : public CLevelDBWrapper
+class CBlockTreeDB : public CDBWrapper
 {
 public:
     CBlockTreeDB(size_t nCacheSize, bool fMemory = false, bool fWipe = false);