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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(bool fMemory) : db(GetDataDir() / "coins", fMemory) {
}
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);
}
CBlockTreeDB::CBlockTreeDB(bool fMemory) : CLevelDB(GetDataDir() / "blktree", fMemory) {
}
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 CCoinsViewDB::GetStats(CCoinsStats &stats) {
leveldb::Iterator *pcursor = db.NewIterator();
pcursor->SeekToFirst();
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 == 'c' && !fRequestShutdown) {
leveldb::Slice slValue = pcursor->value();
CDataStream ssValue(slValue.data(), slValue.data()+slValue.size(), SER_DISK, CLIENT_VERSION);
CCoins coins;
ssValue >> coins;
uint256 txhash;
ssKey >> txhash;
stats.nTransactions++;
BOOST_FOREACH(const CTxOut &out, coins.vout) {
if (!out.IsNull())
stats.nTransactionOutputs++;
}
stats.nSerializedSize += 32 + slValue.size();
}
pcursor->Next();
} catch (std::exception &e) {
return error("%s() : deserialize error", __PRETTY_FUNCTION__);
}
}
delete pcursor;
stats.nHeight = GetBestBlock()->nHeight;
return true;
}
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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