236 lines
8.1 KiB
C++
236 lines
8.1 KiB
C++
// Copyright (c) 2009-2010 Satoshi Nakamoto
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// Copyright (c) 2009-2014 The Bitcoin developers
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// Distributed under the MIT/X11 software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#include "txdb.h"
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#include "core.h"
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#include "pow.h"
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#include "uint256.h"
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#include <stdint.h>
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#include <boost/thread.hpp>
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using namespace std;
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void static BatchWriteCoins(CLevelDBBatch &batch, const uint256 &hash, const CCoins &coins) {
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if (coins.IsPruned())
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batch.Erase(make_pair('c', hash));
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else
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batch.Write(make_pair('c', hash), coins);
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}
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void static BatchWriteHashBestChain(CLevelDBBatch &batch, const uint256 &hash) {
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batch.Write('B', hash);
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}
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CCoinsViewDB::CCoinsViewDB(size_t nCacheSize, bool fMemory, bool fWipe) : db(GetDataDir() / "chainstate", nCacheSize, fMemory, fWipe) {
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}
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bool CCoinsViewDB::GetCoins(const uint256 &txid, CCoins &coins) const {
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return db.Read(make_pair('c', txid), coins);
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}
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bool CCoinsViewDB::SetCoins(const uint256 &txid, const CCoins &coins) {
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CLevelDBBatch batch;
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BatchWriteCoins(batch, txid, coins);
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return db.WriteBatch(batch);
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}
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bool CCoinsViewDB::HaveCoins(const uint256 &txid) const {
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return db.Exists(make_pair('c', txid));
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}
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uint256 CCoinsViewDB::GetBestBlock() const {
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uint256 hashBestChain;
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if (!db.Read('B', hashBestChain))
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return uint256(0);
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return hashBestChain;
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}
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bool CCoinsViewDB::SetBestBlock(const uint256 &hashBlock) {
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CLevelDBBatch batch;
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BatchWriteHashBestChain(batch, hashBlock);
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return db.WriteBatch(batch);
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}
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bool CCoinsViewDB::BatchWrite(CCoinsMap &mapCoins, const uint256 &hashBlock) {
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LogPrint("coindb", "Committing %u changed transactions to coin database...\n", (unsigned int)mapCoins.size());
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CLevelDBBatch batch;
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for (CCoinsMap::iterator it = mapCoins.begin(); it != mapCoins.end();) {
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BatchWriteCoins(batch, it->first, it->second);
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CCoinsMap::iterator itOld = it++;
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mapCoins.erase(itOld);
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}
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if (hashBlock != uint256(0))
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BatchWriteHashBestChain(batch, hashBlock);
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return db.WriteBatch(batch);
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}
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CBlockTreeDB::CBlockTreeDB(size_t nCacheSize, bool fMemory, bool fWipe) : CLevelDBWrapper(GetDataDir() / "blocks" / "index", nCacheSize, fMemory, fWipe) {
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}
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bool CBlockTreeDB::WriteBlockIndex(const CDiskBlockIndex& blockindex)
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{
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return Write(make_pair('b', blockindex.GetBlockHash()), blockindex);
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}
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bool CBlockTreeDB::WriteBlockFileInfo(int nFile, const CBlockFileInfo &info) {
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return Write(make_pair('f', nFile), info);
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}
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bool CBlockTreeDB::ReadBlockFileInfo(int nFile, CBlockFileInfo &info) {
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return Read(make_pair('f', nFile), info);
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}
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bool CBlockTreeDB::WriteLastBlockFile(int nFile) {
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return Write('l', nFile);
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}
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bool CBlockTreeDB::WriteReindexing(bool fReindexing) {
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if (fReindexing)
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return Write('R', '1');
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else
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return Erase('R');
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}
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bool CBlockTreeDB::ReadReindexing(bool &fReindexing) {
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fReindexing = Exists('R');
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return true;
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}
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bool CBlockTreeDB::ReadLastBlockFile(int &nFile) {
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return Read('l', nFile);
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}
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bool CCoinsViewDB::GetStats(CCoinsStats &stats) const {
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/* It seems that there are no "const iterators" for LevelDB. Since we
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only need read operations on it, use a const-cast to get around
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that restriction. */
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leveldb::Iterator *pcursor = const_cast<CLevelDBWrapper*>(&db)->NewIterator();
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pcursor->SeekToFirst();
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CHashWriter ss(SER_GETHASH, PROTOCOL_VERSION);
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stats.hashBlock = GetBestBlock();
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ss << stats.hashBlock;
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int64_t nTotalAmount = 0;
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while (pcursor->Valid()) {
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boost::this_thread::interruption_point();
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try {
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leveldb::Slice slKey = pcursor->key();
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CDataStream ssKey(slKey.data(), slKey.data()+slKey.size(), SER_DISK, CLIENT_VERSION);
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char chType;
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ssKey >> chType;
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if (chType == 'c') {
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leveldb::Slice slValue = pcursor->value();
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CDataStream ssValue(slValue.data(), slValue.data()+slValue.size(), SER_DISK, CLIENT_VERSION);
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CCoins coins;
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ssValue >> coins;
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uint256 txhash;
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ssKey >> txhash;
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ss << txhash;
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ss << VARINT(coins.nVersion);
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ss << (coins.fCoinBase ? 'c' : 'n');
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ss << VARINT(coins.nHeight);
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stats.nTransactions++;
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for (unsigned int i=0; i<coins.vout.size(); i++) {
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const CTxOut &out = coins.vout[i];
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if (!out.IsNull()) {
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stats.nTransactionOutputs++;
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ss << VARINT(i+1);
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ss << out;
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nTotalAmount += out.nValue;
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}
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}
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stats.nSerializedSize += 32 + slValue.size();
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ss << VARINT(0);
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}
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pcursor->Next();
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} catch (std::exception &e) {
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return error("%s : Deserialize or I/O error - %s", __func__, e.what());
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}
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}
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stats.nHeight = mapBlockIndex.find(GetBestBlock())->second->nHeight;
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stats.hashSerialized = ss.GetHash();
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stats.nTotalAmount = nTotalAmount;
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return true;
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}
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bool CBlockTreeDB::ReadTxIndex(const uint256 &txid, CDiskTxPos &pos) {
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return Read(make_pair('t', txid), pos);
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}
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bool CBlockTreeDB::WriteTxIndex(const std::vector<std::pair<uint256, CDiskTxPos> >&vect) {
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CLevelDBBatch batch;
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for (std::vector<std::pair<uint256,CDiskTxPos> >::const_iterator it=vect.begin(); it!=vect.end(); it++)
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batch.Write(make_pair('t', it->first), it->second);
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return WriteBatch(batch);
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}
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bool CBlockTreeDB::WriteFlag(const std::string &name, bool fValue) {
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return Write(std::make_pair('F', name), fValue ? '1' : '0');
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}
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bool CBlockTreeDB::ReadFlag(const std::string &name, bool &fValue) {
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char ch;
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if (!Read(std::make_pair('F', name), ch))
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return false;
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fValue = ch == '1';
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return true;
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}
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bool CBlockTreeDB::LoadBlockIndexGuts()
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{
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boost::scoped_ptr<leveldb::Iterator> pcursor(NewIterator());
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CDataStream ssKeySet(SER_DISK, CLIENT_VERSION);
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ssKeySet << make_pair('b', uint256(0));
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pcursor->Seek(ssKeySet.str());
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// Load mapBlockIndex
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while (pcursor->Valid()) {
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boost::this_thread::interruption_point();
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try {
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leveldb::Slice slKey = pcursor->key();
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CDataStream ssKey(slKey.data(), slKey.data()+slKey.size(), SER_DISK, CLIENT_VERSION);
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char chType;
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ssKey >> chType;
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if (chType == 'b') {
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leveldb::Slice slValue = pcursor->value();
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CDataStream ssValue(slValue.data(), slValue.data()+slValue.size(), SER_DISK, CLIENT_VERSION);
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CDiskBlockIndex diskindex;
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ssValue >> diskindex;
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// Construct block index object
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CBlockIndex* pindexNew = InsertBlockIndex(diskindex.GetBlockHash());
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pindexNew->pprev = InsertBlockIndex(diskindex.hashPrev);
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pindexNew->nHeight = diskindex.nHeight;
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pindexNew->nFile = diskindex.nFile;
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pindexNew->nDataPos = diskindex.nDataPos;
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pindexNew->nUndoPos = diskindex.nUndoPos;
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pindexNew->nVersion = diskindex.nVersion;
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pindexNew->hashMerkleRoot = diskindex.hashMerkleRoot;
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pindexNew->nTime = diskindex.nTime;
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pindexNew->nBits = diskindex.nBits;
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pindexNew->nNonce = diskindex.nNonce;
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pindexNew->nStatus = diskindex.nStatus;
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pindexNew->nTx = diskindex.nTx;
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if (!CheckProofOfWork(pindexNew->GetBlockHash(), pindexNew->nBits))
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return error("LoadBlockIndex() : CheckProofOfWork failed: %s", pindexNew->ToString());
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pcursor->Next();
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} else {
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break; // if shutdown requested or finished loading block index
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}
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} catch (std::exception &e) {
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return error("%s : Deserialize or I/O error - %s", __func__, e.what());
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}
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}
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return true;
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}
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