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LevelDB block and coin databases

Browse source 
Split off CBlockTreeDB and CCoinsViewDB into txdb-*.{cpp,h} files,
implemented by either LevelDB or BDB.

Based on code from earlier commits by Mike Hearn in his leveldb
branch.
This commit is contained in:
Pieter Wuille 2012-09-03 21:14:03 +02:00
parent 44d40f26dc
commit 2d8a48292b
15 changed files with 574 additions and 340 deletions
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6
bitcoin-qt.pro
View file

@ -92,12 +92,15 @@ contains(BITCOIN_NEED_QT_PLUGINS, 1) {
contains(USE_LEVELDB, -) {
message(Building without LevelDB)
SOURCES += src/txdb-bdb.cpp
HEADERS += src/txdb-bdb.h
} else {
message(Building with LevelDB)
DEFINES += USE_LEVELDB
INCLUDEPATH += src/leveldb/include src/leveldb/helpers
LIBS += $$PWD/src/leveldb/libleveldb.a $$PWD/src/leveldb/libmemenv.a
SOURCES += src/leveldb.cpp
SOURCES += src/leveldb.cpp src/txdb-leveldb.cpp
HEADERS += src/leveldb.h src/txdb-leveldb.h
!windows {
genleveldb.commands = cd $$PWD/src/leveldb ; $(MAKE) libleveldb.a libmemenv.a
} else {
@ -153,6 +156,7 @@ HEADERS += src/qt/bitcoingui.h \
src/net.h \
src/key.h \
src/db.h \
src/txdb.h \
src/walletdb.h \
src/script.h \
src/init.h \

279
src/db.cpp
View file

@ -482,285 +482,6 @@ void CDBEnv::Flush(bool fShutdown)
//
// CBlockTreeDB and CCoinsDB
//
bool CCoinsDB::HaveCoins(uint256 hash) {
assert(!fClient);
return Exists(make_pair('c', hash));
}
bool CCoinsDB::ReadCoins(uint256 hash, CCoins &coins) {
assert(!fClient);
return Read(make_pair('c', hash), coins);
}
bool CCoinsDB::WriteCoins(uint256 hash, const CCoins &coins) {
assert(!fClient);
if (coins.IsPruned())
return Erase(make_pair('c', hash));
else
return Write(make_pair('c', hash), coins);
}
bool CBlockTreeDB::WriteBlockIndex(const CDiskBlockIndex& blockindex)
{
return Write(make_pair('b', blockindex.GetBlockHash()), blockindex);
}
bool CCoinsDB::ReadHashBestChain(uint256& hashBestChain)
{
return Read('B', hashBestChain);
}
bool CCoinsDB::WriteHashBestChain(uint256 hashBestChain)
{
return Write('B', hashBestChain);
}
bool CBlockTreeDB::ReadBestInvalidWork(CBigNum& bnBestInvalidWork)
{
return Read('I', bnBestInvalidWork);
}
bool CBlockTreeDB::WriteBestInvalidWork(CBigNum bnBestInvalidWork)
{
return Write('I', bnBestInvalidWork);
}
bool CBlockTreeDB::WriteBlockFileInfo(int nFile, const CBlockFileInfo &info) {
return Write(make_pair('f', nFile), info);
}
bool CBlockTreeDB::ReadBlockFileInfo(int nFile, CBlockFileInfo &info) {
return Read(make_pair('f', nFile), info);
}
bool CBlockTreeDB::WriteLastBlockFile(int nFile) {
return Write('l', nFile);
}
bool CBlockTreeDB::ReadLastBlockFile(int &nFile) {
return Read('l', nFile);
}
CCoinsViewDB::CCoinsViewDB() : db("cr+") {}
bool CCoinsViewDB::GetCoins(uint256 txid, CCoins &coins) { return db.ReadCoins(txid, coins); }
bool CCoinsViewDB::SetCoins(uint256 txid, const CCoins &coins) { return db.WriteCoins(txid, coins); }
bool CCoinsViewDB::HaveCoins(uint256 txid) { return db.HaveCoins(txid); }
CBlockIndex *CCoinsViewDB::GetBestBlock() {
uint256 hashBestChain;
if (!db.ReadHashBestChain(hashBestChain))
return NULL;
std::map<uint256, CBlockIndex*>::iterator it = mapBlockIndex.find(hashBestChain);
if (it == mapBlockIndex.end())
return NULL;
return it->second;
}
bool CCoinsViewDB::SetBestBlock(CBlockIndex *pindex) { return db.WriteHashBestChain(pindex->GetBlockHash()); }
bool CCoinsViewDB::BatchWrite(const std::map<uint256, CCoins> &mapCoins, CBlockIndex *pindex) {
printf("Committing %u changed transactions to coin database...\n", (unsigned int)mapCoins.size());
if (!db.TxnBegin())
return false;
bool fOk = true;
for (std::map<uint256, CCoins>::const_iterator it = mapCoins.begin(); it != mapCoins.end(); it++) {
fOk = db.WriteCoins(it->first, it->second);
if (!fOk)
break;
}
if (fOk)
fOk = db.WriteHashBestChain(pindex->GetBlockHash());
if (!fOk)
db.TxnAbort();
else
fOk = db.TxnCommit();
return fOk;
}
CBlockIndex static * InsertBlockIndex(uint256 hash)
{
if (hash == 0)
return NULL;
// Return existing
map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.find(hash);
if (mi != mapBlockIndex.end())
return (*mi).second;
// Create new
CBlockIndex* pindexNew = new CBlockIndex();
if (!pindexNew)
throw runtime_error("LoadBlockIndex() : new CBlockIndex failed");
mi = mapBlockIndex.insert(make_pair(hash, pindexNew)).first;
pindexNew->phashBlock = &((*mi).first);
return pindexNew;
}
bool LoadBlockIndexDB()
{
if (!pblocktree->LoadBlockIndexGuts())
return false;
if (fRequestShutdown)
return true;
// Calculate bnChainWork
vector<pair<int, CBlockIndex*> > vSortedByHeight;
vSortedByHeight.reserve(mapBlockIndex.size());
BOOST_FOREACH(const PAIRTYPE(uint256, CBlockIndex*)& item, mapBlockIndex)
{
CBlockIndex* pindex = item.second;
vSortedByHeight.push_back(make_pair(pindex->nHeight, pindex));
}
sort(vSortedByHeight.begin(), vSortedByHeight.end());
BOOST_FOREACH(const PAIRTYPE(int, CBlockIndex*)& item, vSortedByHeight)
{
CBlockIndex* pindex = item.second;
pindex->bnChainWork = (pindex->pprev ? pindex->pprev->bnChainWork : 0) + pindex->GetBlockWork();
pindex->nChainTx = (pindex->pprev ? pindex->pprev->nChainTx : 0) + pindex->nTx;
if ((pindex->nStatus & BLOCK_VALID_MASK) >= BLOCK_VALID_TRANSACTIONS && !(pindex->nStatus & BLOCK_FAILED_MASK))
setBlockIndexValid.insert(pindex);
}
// Load block file info
pblocktree->ReadLastBlockFile(nLastBlockFile);
printf("LoadBlockIndex(): last block file = %i\n", nLastBlockFile);
if (pblocktree->ReadBlockFileInfo(nLastBlockFile, infoLastBlockFile))
printf("LoadBlockIndex(): last block file: %s\n", infoLastBlockFile.ToString().c_str());
// Load hashBestChain pointer to end of best chain
pindexBest = pcoinsTip->GetBestBlock();
if (pindexBest == NULL)
{
if (pindexGenesisBlock == NULL)
return true;
}
hashBestChain = pindexBest->GetBlockHash();
nBestHeight = pindexBest->nHeight;
bnBestChainWork = pindexBest->bnChainWork;
// set 'next' pointers in best chain
CBlockIndex *pindex = pindexBest;
while(pindex != NULL && pindex->pprev != NULL) {
CBlockIndex *pindexPrev = pindex->pprev;
pindexPrev->pnext = pindex;
pindex = pindexPrev;
}
printf("LoadBlockIndex(): hashBestChain=%s height=%d date=%s\n",
hashBestChain.ToString().substr(0,20).c_str(), nBestHeight,
DateTimeStrFormat("%x %H:%M:%S", pindexBest->GetBlockTime()).c_str());
// Load bnBestInvalidWork, OK if it doesn't exist
pblocktree->ReadBestInvalidWork(bnBestInvalidWork);
// Verify blocks in the best chain
int nCheckLevel = GetArg("-checklevel", 1);
int nCheckDepth = GetArg( "-checkblocks", 2500);
if (nCheckDepth == 0)
nCheckDepth = 1000000000; // suffices until the year 19000
if (nCheckDepth > nBestHeight)
nCheckDepth = nBestHeight;
printf("Verifying last %i blocks at level %i\n", nCheckDepth, nCheckLevel);
CBlockIndex* pindexFork = NULL;
for (CBlockIndex* pindex = pindexBest; pindex && pindex->pprev; pindex = pindex->pprev)
{
if (fRequestShutdown || pindex->nHeight < nBestHeight-nCheckDepth)
break;
CBlock block;
if (!block.ReadFromDisk(pindex))
return error("LoadBlockIndex() : block.ReadFromDisk failed");
// check level 1: verify block validity
if (nCheckLevel>0 && !block.CheckBlock())
{
printf("LoadBlockIndex() : *** found bad block at %d, hash=%s\n", pindex->nHeight, pindex->GetBlockHash().ToString().c_str());
pindexFork = pindex->pprev;
}
// TODO: stronger verifications
}
if (pindexFork && !fRequestShutdown)
{
// TODO: reorg back
return error("LoadBlockIndex(): chain database corrupted");
}
return true;
}
bool CBlockTreeDB::LoadBlockIndexGuts()
{
// Get database cursor
Dbc* pcursor = GetCursor();
if (!pcursor)
return false;
// Load mapBlockIndex
unsigned int fFlags = DB_SET_RANGE;
loop
{
// Read next record
CDataStream ssKey(SER_DISK, CLIENT_VERSION);
if (fFlags == DB_SET_RANGE)
ssKey << make_pair('b', uint256(0));
CDataStream ssValue(SER_DISK, CLIENT_VERSION);
int ret = ReadAtCursor(pcursor, ssKey, ssValue, fFlags);
fFlags = DB_NEXT;
if (ret == DB_NOTFOUND)
break;
else if (ret != 0)
return false;
// Unserialize
try {
char chType;
ssKey >> chType;
if (chType == 'b' && !fRequestShutdown)
{
CDiskBlockIndex diskindex;
ssValue >> diskindex;
// Construct block index object
CBlockIndex* pindexNew = InsertBlockIndex(diskindex.GetBlockHash());
pindexNew->pprev = InsertBlockIndex(diskindex.hashPrev);
pindexNew->nHeight = diskindex.nHeight;
pindexNew->nFile = diskindex.nFile;
pindexNew->nDataPos = diskindex.nDataPos;
pindexNew->nUndoPos = diskindex.nUndoPos;
pindexNew->nVersion = diskindex.nVersion;
pindexNew->hashMerkleRoot = diskindex.hashMerkleRoot;
pindexNew->nTime = diskindex.nTime;
pindexNew->nBits = diskindex.nBits;
pindexNew->nNonce = diskindex.nNonce;
pindexNew->nStatus = diskindex.nStatus;
pindexNew->nTx = diskindex.nTx;
// Watch for genesis block
if (pindexGenesisBlock == NULL && diskindex.GetBlockHash() == hashGenesisBlock)
pindexGenesisBlock = pindexNew;
if (!pindexNew->CheckIndex())
return error("LoadBlockIndex() : CheckIndex failed: %s", pindexNew->ToString().c_str());
}
else
{
break; // if shutdown requested or finished loading block index
}
} // try
catch (std::exception &e) {
return error("%s() : deserialize error", __PRETTY_FUNCTION__);
}
}
pcursor->close();
return true;
}

55
src/db.h
View file

@ -315,61 +315,6 @@ public:
/** Access to the transaction database (coins.dat) */
class CCoinsDB : public CDB
{
public:
CCoinsDB(const char* pszMode="r+") : CDB("coins.dat", pszMode) { }
private:
CCoinsDB(const CCoinsDB&);
void operator=(const CCoinsDB&);
public:
bool ReadCoins(uint256 hash, CCoins &coins);
bool WriteCoins(uint256 hash, const CCoins& coins);
bool HaveCoins(uint256 hash);
bool ReadHashBestChain(uint256& hashBestChain);
bool WriteHashBestChain(uint256 hashBestChain);
};
/** CCoinsView backed by a CCoinsDB */
class CCoinsViewDB : public CCoinsView
{
protected:
CCoinsDB db;
public:
CCoinsViewDB();
bool GetCoins(uint256 txid, CCoins &coins);
bool SetCoins(uint256 txid, const CCoins &coins);
bool HaveCoins(uint256 txid);
CBlockIndex *GetBestBlock();
bool SetBestBlock(CBlockIndex *pindex);
bool BatchWrite(const std::map<uint256, CCoins> &mapCoins, CBlockIndex *pindex);
};
/** Access to the block database (blktree.dat) */
class CBlockTreeDB : public CDB
{
public:
CBlockTreeDB(const char* pszMode="r+") : CDB("blktree.dat", pszMode) { }
private:
CBlockTreeDB(const CBlockTreeDB&);
void operator=(const CBlockTreeDB&);
public:
bool WriteBlockIndex(const CDiskBlockIndex& blockindex);
bool ReadBestInvalidWork(CBigNum& bnBestInvalidWork);
bool WriteBestInvalidWork(CBigNum bnBestInvalidWork);
bool ReadBlockFileInfo(int nFile, CBlockFileInfo &fileinfo);
bool WriteBlockFileInfo(int nFile, const CBlockFileInfo &fileinfo);
bool ReadLastBlockFile(int &nFile);
bool WriteLastBlockFile(int nFile);
bool LoadBlockIndexGuts();
};
bool LoadBlockIndexDB();
/** Access to the (IP) address database (peers.dat) */
class CAddrDB

2
src/init.cpp
View file

@ -2,7 +2,7 @@
// Copyright (c) 2009-2012 The Bitcoin developers
// Distributed under the MIT/X11 software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include "db.h"
#include "txdb.h"
#include "walletdb.h"
#include "bitcoinrpc.h"
#include "net.h"

112
src/main.cpp
View file

@ -6,6 +6,7 @@
#include "alert.h"
#include "checkpoints.h"
#include "db.h"
#include "txdb.h"
#include "net.h"
#include "init.h"
#include "ui_interface.h"
@ -1719,6 +1720,7 @@ bool SetBestChain(CBlockIndex* pindexNew)
bool fIsInitialDownload = IsInitialBlockDownload();
if (!fIsInitialDownload || view.GetCacheSize()>5000) {
FlushBlockFile();
pblocktree->Sync();
if (!view.Flush())
return false;
}
@ -2203,6 +2205,116 @@ FILE *OpenUndoFile(const CDiskBlockPos &pos, bool fReadOnly) {
return OpenDiskFile(pos, "rev", fReadOnly);
}
CBlockIndex * InsertBlockIndex(uint256 hash)
{
if (hash == 0)
return NULL;
// Return existing
map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.find(hash);
if (mi != mapBlockIndex.end())
return (*mi).second;
// Create new
CBlockIndex* pindexNew = new CBlockIndex();
if (!pindexNew)
throw runtime_error("LoadBlockIndex() : new CBlockIndex failed");
mi = mapBlockIndex.insert(make_pair(hash, pindexNew)).first;
pindexNew->phashBlock = &((*mi).first);
return pindexNew;
}
bool static LoadBlockIndexDB()
{
if (!pblocktree->LoadBlockIndexGuts())
return false;
if (fRequestShutdown)
return true;
// Calculate bnChainWork
vector<pair<int, CBlockIndex*> > vSortedByHeight;
vSortedByHeight.reserve(mapBlockIndex.size());
BOOST_FOREACH(const PAIRTYPE(uint256, CBlockIndex*)& item, mapBlockIndex)
{
CBlockIndex* pindex = item.second;
vSortedByHeight.push_back(make_pair(pindex->nHeight, pindex));
}
sort(vSortedByHeight.begin(), vSortedByHeight.end());
BOOST_FOREACH(const PAIRTYPE(int, CBlockIndex*)& item, vSortedByHeight)
{
CBlockIndex* pindex = item.second;
pindex->bnChainWork = (pindex->pprev ? pindex->pprev->bnChainWork : 0) + pindex->GetBlockWork();
pindex->nChainTx = (pindex->pprev ? pindex->pprev->nChainTx : 0) + pindex->nTx;
if ((pindex->nStatus & BLOCK_VALID_MASK) >= BLOCK_VALID_TRANSACTIONS && !(pindex->nStatus & BLOCK_FAILED_MASK))
setBlockIndexValid.insert(pindex);
}
// Load block file info
pblocktree->ReadLastBlockFile(nLastBlockFile);
printf("LoadBlockIndex(): last block file = %i\n", nLastBlockFile);
if (pblocktree->ReadBlockFileInfo(nLastBlockFile, infoLastBlockFile))
printf("LoadBlockIndex(): last block file: %s\n", infoLastBlockFile.ToString().c_str());
// Load hashBestChain pointer to end of best chain
pindexBest = pcoinsTip->GetBestBlock();
if (pindexBest == NULL)
{
if (pindexGenesisBlock == NULL)
return true;
}
hashBestChain = pindexBest->GetBlockHash();
nBestHeight = pindexBest->nHeight;
bnBestChainWork = pindexBest->bnChainWork;
// set 'next' pointers in best chain
CBlockIndex *pindex = pindexBest;
while(pindex != NULL && pindex->pprev != NULL) {
CBlockIndex *pindexPrev = pindex->pprev;
pindexPrev->pnext = pindex;
pindex = pindexPrev;
}
printf("LoadBlockIndex(): hashBestChain=%s height=%d date=%s\n",
hashBestChain.ToString().substr(0,20).c_str(), nBestHeight,
DateTimeStrFormat("%x %H:%M:%S", pindexBest->GetBlockTime()).c_str());
// Load bnBestInvalidWork, OK if it doesn't exist
pblocktree->ReadBestInvalidWork(bnBestInvalidWork);
// Verify blocks in the best chain
int nCheckLevel = GetArg("-checklevel", 1);
int nCheckDepth = GetArg( "-checkblocks", 2500);
if (nCheckDepth == 0)
nCheckDepth = 1000000000; // suffices until the year 19000
if (nCheckDepth > nBestHeight)
nCheckDepth = nBestHeight;
printf("Verifying last %i blocks at level %i\n", nCheckDepth, nCheckLevel);
CBlockIndex* pindexFork = NULL;
for (CBlockIndex* pindex = pindexBest; pindex && pindex->pprev; pindex = pindex->pprev)
{
if (fRequestShutdown || pindex->nHeight < nBestHeight-nCheckDepth)
break;
CBlock block;
if (!block.ReadFromDisk(pindex))
return error("LoadBlockIndex() : block.ReadFromDisk failed");
// check level 1: verify block validity
if (nCheckLevel>0 && !block.CheckBlock())
{
printf("LoadBlockIndex() : *** found bad block at %d, hash=%s\n", pindex->nHeight, pindex->GetBlockHash().ToString().c_str());
pindexFork = pindex->pprev;
}
// TODO: stronger verifications
}
if (pindexFork && !fRequestShutdown)
{
// TODO: reorg back
return error("LoadBlockIndex(): chain database corrupted");
}
return true;
}
bool LoadBlockIndex(bool fAllowNew)
{
if (fTestNet)

1
src/main.h
View file

@ -119,6 +119,7 @@ std::string GetWarnings(std::string strFor);
bool GetTransaction(const uint256 &hash, CTransaction &tx, uint256 &hashBlock, bool fAllowSlow = false);
bool SetBestChain(CBlockIndex* pindexNew);
bool ConnectBestBlock();
CBlockIndex * InsertBlockIndex(uint256 hash);

4
src/makefile.linux-mingw
View file

@ -91,10 +91,12 @@ ifdef USE_LEVELDB
LIBS += $(CURDIR)/leveldb/libleveldb.a $(CURDIR)/leveldb/libmemenv.a
DEFS += -I"$(CURDIR)/leveldb/include" -DUSE_LEVELDB
DEFS += -I"$(CURDIR)/leveldb/helpers"
OBJS += obj/leveldb.o
OBJS += obj/leveldb.o obj/txdb-leveldb.o
leveldb/libleveldb.a:
@echo "Building LevelDB ..."; cd leveldb; TARGET_OS=OS_WINDOWS_CROSSCOMPILE CXXFLAGS="-I$(INCLUDEPATHS)" LDFLAGS="-L$(LIBPATHS)" make libleveldb.a libmemenv.a; cd ..
obj/leveldb.o: leveldb/libleveldb.a
else
OBJS += obj/txdb-bdb.o
endif
obj/build.h: FORCE

4
src/makefile.mingw
View file

@ -94,10 +94,12 @@ ifdef USE_LEVELDB
LIBS += $(CURDIR)/leveldb/libleveldb.a $(CURDIR)/leveldb/libmemenv.a
DEFS += $(addprefix -I,$(CURDIR)/leveldb/include) -DUSE_LEVELDB
DEFS += $(addprefix -I,$(CURDIR)/leveldb/helpers)
OBJS += obj/leveldb.o
OBJS += obj/leveldb.o obj/txdb-leveldb.o
leveldb/libleveldb.a:
cd leveldb; make libleveldb.a libmemenv.a; cd ..
obj/leveldb.o: leveldb/libleveldb.lib
else
OBJS += obj/txdb-bdb.o
endif
obj/%.o: %.cpp $(HEADERS)

4
src/makefile.osx
View file

@ -127,10 +127,12 @@ ifdef USE_LEVELDB
LIBS += $(CURDIR)/leveldb/libleveldb.a $(CURDIR)/leveldb/libmemenv.a
DEFS += $(addprefix -I,$(CURDIR)/leveldb/include) -DUSE_LEVELDB
DEFS += $(addprefix -I,$(CURDIR)/leveldb/helpers)
OBJS += obj/leveldb.o
OBJS += obj/leveldb.o obj/txdb-leveldb.o
leveldb/libleveldb.a:
@echo "Building LevelDB ..."; cd leveldb; make libleveldb.a libmemenv.a; cd ..
obj/leveldb.o: leveldb/libleveldb.a
else
OBJS += obj/txdb-bdb.o
endif
# auto-generated dependencies:

4
src/makefile.unix
View file

@ -143,10 +143,12 @@ ifdef USE_LEVELDB
LIBS += $(CURDIR)/leveldb/libleveldb.a $(CURDIR)/leveldb/libmemenv.a
DEFS += $(addprefix -I,$(CURDIR)/leveldb/include) -DUSE_LEVELDB
DEFS += $(addprefix -I,$(CURDIR)/leveldb/helpers)
OBJS += obj/leveldb.o
OBJS += obj/leveldb.o obj/txdb-leveldb.o
leveldb/libleveldb.a:
@echo "Building LevelDB ..."; cd leveldb; make libleveldb.a libmemenv.a; cd ..;
obj/leveldb.o: leveldb/libleveldb.a
else
OBJS += obj/txdb-bdb.o
endif
# auto-generated dependencies:

171
src/txdb-bdb.cpp Normal file
View file

@ -0,0 +1,171 @@
// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2009-2012 The Bitcoin developers
// Distributed under the MIT/X11 software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include "txdb-bdb.h"
bool CCoinsDB::HaveCoins(uint256 hash) {
assert(!fClient);
return Exists(make_pair('c', hash));
}
bool CCoinsDB::ReadCoins(uint256 hash, CCoins &coins) {
assert(!fClient);
return Read(make_pair('c', hash), coins);
}
bool CCoinsDB::WriteCoins(uint256 hash, const CCoins &coins) {
assert(!fClient);
if (coins.IsPruned())
return Erase(make_pair('c', hash));
else
return Write(make_pair('c', hash), coins);
}
bool CCoinsDB::ReadHashBestChain(uint256& hashBestChain)
{
return Read('B', hashBestChain);
}
bool CCoinsDB::WriteHashBestChain(uint256 hashBestChain)
{
return Write('B', hashBestChain);
}
bool CBlockTreeDB::WriteBlockIndex(const CDiskBlockIndex& blockindex)
{
return Write(make_pair('b', blockindex.GetBlockHash()), blockindex);
}
bool CBlockTreeDB::ReadBestInvalidWork(CBigNum& bnBestInvalidWork)
{
return Read('I', bnBestInvalidWork);
}
bool CBlockTreeDB::WriteBestInvalidWork(CBigNum bnBestInvalidWork)
{
return Write('I', bnBestInvalidWork);
}
bool CBlockTreeDB::WriteBlockFileInfo(int nFile, const CBlockFileInfo &info) {
return Write(make_pair('f', nFile), info);
}
bool CBlockTreeDB::ReadBlockFileInfo(int nFile, CBlockFileInfo &info) {
return Read(make_pair('f', nFile), info);
}
bool CBlockTreeDB::WriteLastBlockFile(int nFile) {
return Write('l', nFile);
}
bool CBlockTreeDB::ReadLastBlockFile(int &nFile) {
return Read('l', nFile);
}
CCoinsViewDB::CCoinsViewDB() : db("cr+") {}
bool CCoinsViewDB::GetCoins(uint256 txid, CCoins &coins) { return db.ReadCoins(txid, coins); }
bool CCoinsViewDB::SetCoins(uint256 txid, const CCoins &coins) { return db.WriteCoins(txid, coins); }
bool CCoinsViewDB::HaveCoins(uint256 txid) { return db.HaveCoins(txid); }
CBlockIndex *CCoinsViewDB::GetBestBlock() {
uint256 hashBestChain;
if (!db.ReadHashBestChain(hashBestChain))
return NULL;
std::map<uint256, CBlockIndex*>::iterator it = mapBlockIndex.find(hashBestChain);
if (it == mapBlockIndex.end())
return NULL;
return it->second;
}
bool CCoinsViewDB::SetBestBlock(CBlockIndex *pindex) { return db.WriteHashBestChain(pindex->GetBlockHash()); }
bool CCoinsViewDB::BatchWrite(const std::map<uint256, CCoins> &mapCoins, CBlockIndex *pindex) {
printf("Committing %u changed transactions to coin database...\n", (unsigned int)mapCoins.size());
if (!db.TxnBegin())
return false;
bool fOk = true;
for (std::map<uint256, CCoins>::const_iterator it = mapCoins.begin(); it != mapCoins.end(); it++) {
fOk = db.WriteCoins(it->first, it->second);
if (!fOk)
break;
}
if (fOk)
fOk = db.WriteHashBestChain(pindex->GetBlockHash());
if (!fOk)
db.TxnAbort();
else
fOk = db.TxnCommit();
return fOk;
}
bool CBlockTreeDB::LoadBlockIndexGuts()
{
// Get database cursor
Dbc* pcursor = GetCursor();
if (!pcursor)
return false;
// Load mapBlockIndex
unsigned int fFlags = DB_SET_RANGE;
loop
{
// Read next record
CDataStream ssKey(SER_DISK, CLIENT_VERSION);
if (fFlags == DB_SET_RANGE)
ssKey << make_pair('b', uint256(0));
CDataStream ssValue(SER_DISK, CLIENT_VERSION);
int ret = ReadAtCursor(pcursor, ssKey, ssValue, fFlags);
fFlags = DB_NEXT;
if (ret == DB_NOTFOUND)
break;
else if (ret != 0)
return false;
// Unserialize
try {
char chType;
ssKey >> chType;
if (chType == 'b' && !fRequestShutdown)
{
CDiskBlockIndex diskindex;
ssValue >> diskindex;
// Construct block index object
CBlockIndex* pindexNew = InsertBlockIndex(diskindex.GetBlockHash());
pindexNew->pprev = InsertBlockIndex(diskindex.hashPrev);
pindexNew->nHeight = diskindex.nHeight;
pindexNew->nFile = diskindex.nFile;
pindexNew->nDataPos = diskindex.nDataPos;
pindexNew->nUndoPos = diskindex.nUndoPos;
pindexNew->nVersion = diskindex.nVersion;
pindexNew->hashMerkleRoot = diskindex.hashMerkleRoot;
pindexNew->nTime = diskindex.nTime;
pindexNew->nBits = diskindex.nBits;
pindexNew->nNonce = diskindex.nNonce;
pindexNew->nStatus = diskindex.nStatus;
pindexNew->nTx = diskindex.nTx;
// Watch for genesis block
if (pindexGenesisBlock == NULL && diskindex.GetBlockHash() == hashGenesisBlock)
pindexGenesisBlock = pindexNew;
if (!pindexNew->CheckIndex())
return error("LoadBlockIndex() : CheckIndex failed: %s", pindexNew->ToString().c_str());
}
else
{
break; // if shutdown requested or finished loading block index
}
} // try
catch (std::exception &e) {
return error("%s() : deserialize error", __PRETTY_FUNCTION__);
}
}
pcursor->close();
return true;
}

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// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2009-2012 The Bitcoin developers
// Distributed under the MIT/X11 software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#ifndef BITCOIN_TXDB_BDB_H
#define BITCOIN_TXDB_BDB_H
#include "db.h"
/** Access to the transaction database (coins.dat) */
class CCoinsDB : public CDB
{
public:
CCoinsDB(const char* pszMode="r+") : CDB("coins.dat", pszMode) { }
private:
CCoinsDB(const CCoinsDB&);
void operator=(const CCoinsDB&);
public:
bool ReadCoins(uint256 hash, CCoins &coins);
bool WriteCoins(uint256 hash, const CCoins& coins);
bool HaveCoins(uint256 hash);
bool ReadHashBestChain(uint256& hashBestChain);
bool WriteHashBestChain(uint256 hashBestChain);
};
/** CCoinsView backed by a CCoinsDB */
class CCoinsViewDB : public CCoinsView
{
protected:
CCoinsDB db;
public:
CCoinsViewDB();
bool GetCoins(uint256 txid, CCoins &coins);
bool SetCoins(uint256 txid, const CCoins &coins);
bool HaveCoins(uint256 txid);
CBlockIndex *GetBestBlock();
bool SetBestBlock(CBlockIndex *pindex);
bool BatchWrite(const std::map<uint256, CCoins> &mapCoins, CBlockIndex *pindex);
};
/** Access to the block database (blktree.dat) */
class CBlockTreeDB : public CDB
{
public:
CBlockTreeDB(const char* pszMode="r+") : CDB("blktree.dat", pszMode) { }
private:
CBlockTreeDB(const CBlockTreeDB&);
void operator=(const CBlockTreeDB&);
public:
bool WriteBlockIndex(const CDiskBlockIndex& blockindex);
bool ReadBestInvalidWork(CBigNum& bnBestInvalidWork);
bool WriteBestInvalidWork(CBigNum bnBestInvalidWork);
bool ReadBlockFileInfo(int nFile, CBlockFileInfo &fileinfo);
bool WriteBlockFileInfo(int nFile, const CBlockFileInfo &fileinfo);
bool ReadLastBlockFile(int &nFile);
bool WriteLastBlockFile(int nFile);
bool LoadBlockIndexGuts();
};
#endif // BITCOIN_TXDB_BDB_H

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// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2009-2012 The Bitcoin developers
// Distributed under the MIT/X11 software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include "txdb-leveldb.h"
#include "main.h"
using namespace std;
void static BatchWriteCoins(CLevelDBBatch &batch, const uint256 &hash, const CCoins &coins) {
if (coins.IsPruned())
batch.Erase(make_pair('c', hash));
else
batch.Write(make_pair('c', hash), coins);
}
void static BatchWriteHashBestChain(CLevelDBBatch &batch, const uint256 &hash) {
batch.Write('B', hash);
}
CCoinsViewDB::CCoinsViewDB() : db(GetDataDir() / "coins") {
}
bool CCoinsViewDB::GetCoins(uint256 txid, CCoins &coins) {
return db.Read(make_pair('c', txid), coins);
}
bool CCoinsViewDB::SetCoins(uint256 txid, const CCoins &coins) {
CLevelDBBatch batch;
BatchWriteCoins(batch, txid, coins);
return db.WriteBatch(batch);
}
bool CCoinsViewDB::HaveCoins(uint256 txid) {
return db.Exists(make_pair('c', txid));
}
CBlockIndex *CCoinsViewDB::GetBestBlock() {
uint256 hashBestChain;
if (!db.Read('B', hashBestChain))
return NULL;
std::map<uint256, CBlockIndex*>::iterator it = mapBlockIndex.find(hashBestChain);
if (it == mapBlockIndex.end())
return NULL;
return it->second;
}
bool CCoinsViewDB::SetBestBlock(CBlockIndex *pindex) {
CLevelDBBatch batch;
BatchWriteHashBestChain(batch, pindex->GetBlockHash());
return db.WriteBatch(batch);
}
bool CCoinsViewDB::BatchWrite(const std::map<uint256, CCoins> &mapCoins, CBlockIndex *pindex) {
printf("Committing %u changed transactions to coin database...\n", (unsigned int)mapCoins.size());
CLevelDBBatch batch;
for (std::map<uint256, CCoins>::const_iterator it = mapCoins.begin(); it != mapCoins.end(); it++)
BatchWriteCoins(batch, it->first, it->second);
BatchWriteHashBestChain(batch, pindex->GetBlockHash());
return db.WriteBatch(batch);
}
bool CBlockTreeDB::WriteBlockIndex(const CDiskBlockIndex& blockindex)
{
return Write(make_pair('b', blockindex.GetBlockHash()), blockindex);
}
bool CBlockTreeDB::ReadBestInvalidWork(CBigNum& bnBestInvalidWork)
{
return Read('I', bnBestInvalidWork);
}
bool CBlockTreeDB::WriteBestInvalidWork(const CBigNum& bnBestInvalidWork)
{
return Write('I', bnBestInvalidWork);
}
bool CBlockTreeDB::WriteBlockFileInfo(int nFile, const CBlockFileInfo &info) {
return Write(make_pair('f', nFile), info);
}
bool CBlockTreeDB::ReadBlockFileInfo(int nFile, CBlockFileInfo &info) {
return Read(make_pair('f', nFile), info);
}
bool CBlockTreeDB::WriteLastBlockFile(int nFile) {
return Write('l', nFile);
}
bool CBlockTreeDB::ReadLastBlockFile(int &nFile) {
return Read('l', nFile);
}
bool CBlockTreeDB::LoadBlockIndexGuts()
{
leveldb::Iterator *pcursor = NewIterator();
CDataStream ssKeySet(SER_DISK, CLIENT_VERSION);
ssKeySet << make_pair('b', uint256(0));
pcursor->Seek(ssKeySet.str());
// Load mapBlockIndex
while (pcursor->Valid()) {
try {
leveldb::Slice slKey = pcursor->key();
CDataStream ssKey(slKey.data(), slKey.data()+slKey.size(), SER_DISK, CLIENT_VERSION);
char chType;
ssKey >> chType;
if (chType == 'b' && !fRequestShutdown) {
leveldb::Slice slValue = pcursor->value();
CDataStream ssValue(slValue.data(), slValue.data()+slValue.size(), SER_DISK, CLIENT_VERSION);
CDiskBlockIndex diskindex;
ssValue >> diskindex;
// Construct block index object
CBlockIndex* pindexNew = InsertBlockIndex(diskindex.GetBlockHash());
pindexNew->pprev = InsertBlockIndex(diskindex.hashPrev);
pindexNew->nHeight = diskindex.nHeight;
pindexNew->nFile = diskindex.nFile;
pindexNew->nDataPos = diskindex.nDataPos;
pindexNew->nUndoPos = diskindex.nUndoPos;
pindexNew->nVersion = diskindex.nVersion;
pindexNew->hashMerkleRoot = diskindex.hashMerkleRoot;
pindexNew->nTime = diskindex.nTime;
pindexNew->nBits = diskindex.nBits;
pindexNew->nNonce = diskindex.nNonce;
pindexNew->nStatus = diskindex.nStatus;
pindexNew->nTx = diskindex.nTx;
// Watch for genesis block
if (pindexGenesisBlock == NULL && diskindex.GetBlockHash() == hashGenesisBlock)
pindexGenesisBlock = pindexNew;
if (!pindexNew->CheckIndex())
return error("LoadBlockIndex() : CheckIndex failed: %s", pindexNew->ToString().c_str());
pcursor->Next();
} else {
break; // if shutdown requested or finished loading block index
}
} catch (std::exception &e) {
return error("%s() : deserialize error", __PRETTY_FUNCTION__);
}
}
delete pcursor;
return true;
}

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// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2009-2012 The Bitcoin developers
// Distributed under the MIT/X11 software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#ifndef BITCOIN_TXDB_LEVELDB_H
#define BITCOIN_TXDB_LEVELDB_H
#include "main.h"
#include "leveldb.h"
/** CCoinsView backed by the LevelDB coin database (coins/) */
class CCoinsViewDB : public CCoinsView
{
protected:
CLevelDB db;
public:
CCoinsViewDB();
bool GetCoins(uint256 txid, CCoins &coins);
bool SetCoins(uint256 txid, const CCoins &coins);
bool HaveCoins(uint256 txid);
CBlockIndex *GetBestBlock();
bool SetBestBlock(CBlockIndex *pindex);
bool BatchWrite(const std::map<uint256, CCoins> &mapCoins, CBlockIndex *pindex);
};
/** Access to the block database (blktree/) */
class CBlockTreeDB : public CLevelDB
{
public:
CBlockTreeDB(const char* pszMode="r+") : CLevelDB(GetDataDir() / "blktree") { }
private:
CBlockTreeDB(const CBlockTreeDB&);
void operator=(const CBlockTreeDB&);
public:
bool WriteBlockIndex(const CDiskBlockIndex& blockindex);
bool ReadBestInvalidWork(CBigNum& bnBestInvalidWork);
bool WriteBestInvalidWork(const CBigNum& bnBestInvalidWork);
bool ReadBlockFileInfo(int nFile, CBlockFileInfo &fileinfo);
bool WriteBlockFileInfo(int nFile, const CBlockFileInfo &fileinfo);
bool ReadLastBlockFile(int &nFile);
bool WriteLastBlockFile(int nFile);
bool LoadBlockIndexGuts();
};
#endif // BITCOIN_TXDB_LEVELDB_H

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// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2009-2012 The Bitcoin developers
// Distributed under the MIT/X11 software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#ifndef BITCOIN_TXDB_H
#define BITCOIN_TXDB_H
#ifdef USE_LEVELDB
#include "txdb-leveldb.h"
#else
#include "txdb-bdb.h"
#endif
#endif // BITCOIN_TXDB_H