X-Git-Url: https://git.novaco.in/?a=blobdiff_plain;f=src%2Fdb.cpp;h=31abe1d9c76a90fc8ef1777c125e2c352abb6e7e;hb=21c897e170c14da4754fb699d701b9980f092959;hp=c2d18279daece3bf8c9f917a51b9ed8f7fbf5748;hpb=882e00e2159ce5e12170c7c1811236a039d8abfa;p=novacoin.git diff --git a/src/db.cpp b/src/db.cpp index c2d1827..31abe1d 100644 --- a/src/db.cpp +++ b/src/db.cpp @@ -1,20 +1,27 @@ // Copyright (c) 2009-2010 Satoshi Nakamoto -// Copyright (c) 2011 The Bitcoin developers +// Copyright (c) 2009-2012 The Bitcoin developers // Distributed under the MIT/X11 software license, see the accompanying -// file license.txt or http://www.opensource.org/licenses/mit-license.php. +// file COPYING or http://www.opensource.org/licenses/mit-license.php. -#include "headers.h" #include "db.h" #include "net.h" +#include "checkpoints.h" +#include "util.h" +#include "main.h" +#include "kernel.h" +#include "ui_interface.h" #include #include +#ifndef WIN32 +#include "sys/stat.h" +#endif + using namespace std; using namespace boost; unsigned int nWalletDBUpdated; -uint64 nAccountingEntryNumber = 0; @@ -22,44 +29,225 @@ uint64 nAccountingEntryNumber = 0; // CDB // -static CCriticalSection cs_db; -static bool fDbEnvInit = false; -DbEnv dbenv(0); -static map mapFileUseCount; -static map mapDb; +CDBEnv bitdb; -static void EnvShutdown() +void CDBEnv::EnvShutdown() { if (!fDbEnvInit) return; fDbEnvInit = false; - try - { - dbenv.close(0); - } - catch (const DbException& e) + int ret = dbenv.close(0); + if (ret != 0) + printf("EnvShutdown exception: %s (%d)\n", DbEnv::strerror(ret), ret); + if (!fMockDb) + DbEnv(0).remove(strPath.c_str(), 0); +} + +CDBEnv::CDBEnv() : dbenv(DB_CXX_NO_EXCEPTIONS) +{ + fDbEnvInit = false; + fMockDb = false; +} + +CDBEnv::~CDBEnv() +{ + EnvShutdown(); +} + +void CDBEnv::Close() +{ + EnvShutdown(); +} + +bool CDBEnv::Open(boost::filesystem::path pathEnv_) +{ + if (fDbEnvInit) + return true; + + if (fShutdown) + return false; + + pathEnv = pathEnv_; + filesystem::path pathDataDir = pathEnv; + strPath = pathDataDir.string(); + filesystem::path pathLogDir = pathDataDir / "database"; + filesystem::create_directory(pathLogDir); + filesystem::path pathErrorFile = pathDataDir / "db.log"; + printf("dbenv.open LogDir=%s ErrorFile=%s\n", pathLogDir.string().c_str(), pathErrorFile.string().c_str()); + + unsigned int nEnvFlags = 0; + if (GetBoolArg("-privdb", true)) + nEnvFlags |= DB_PRIVATE; + + int nDbCache = GetArg("-dbcache", 25); + dbenv.set_lg_dir(pathLogDir.string().c_str()); + dbenv.set_cachesize(nDbCache / 1024, (nDbCache % 1024)*1048576, 1); + dbenv.set_lg_bsize(1048576); + dbenv.set_lg_max(10485760); + + // Bugfix: Bump lk_max_locks default to 537000, to safely handle reorgs with up to 5 blocks reversed + // dbenv.set_lk_max_locks(10000); + dbenv.set_lk_max_locks(537000); + + dbenv.set_lk_max_objects(10000); + dbenv.set_errfile(fopen(pathErrorFile.string().c_str(), "a")); /// debug + dbenv.set_flags(DB_AUTO_COMMIT, 1); + dbenv.set_flags(DB_TXN_WRITE_NOSYNC, 1); +#ifdef DB_LOG_AUTO_REMOVE + dbenv.log_set_config(DB_LOG_AUTO_REMOVE, 1); +#endif + int ret = dbenv.open(strPath.c_str(), + DB_CREATE | + DB_INIT_LOCK | + DB_INIT_LOG | + DB_INIT_MPOOL | + DB_INIT_TXN | + DB_THREAD | + DB_RECOVER | + nEnvFlags, + S_IRUSR | S_IWUSR); + if (ret != 0) + return error("CDB() : error %s (%d) opening database environment", DbEnv::strerror(ret), ret); + + fDbEnvInit = true; + fMockDb = false; + + // Check that the number of locks is sufficient (to prevent chain fork possibility, read http://bitcoin.org/may15 for more info) + u_int32_t nMaxLocks; + if (!dbenv.get_lk_max_locks(&nMaxLocks)) { - printf("EnvShutdown exception: %s (%d)\n", e.what(), e.get_errno()); + int nBlocks, nDeepReorg; + std::string strMessage; + + nBlocks = nMaxLocks / 48768; + nDeepReorg = (nBlocks - 1) / 2; + + printf("Final lk_max_locks is %lu, sufficient for (worst case) %d block%s in a single transaction (up to a %d-deep reorganization)\n", (unsigned long)nMaxLocks, nBlocks, (nBlocks == 1) ? "" : "s", nDeepReorg); + if (nDeepReorg < 3) + { + if (nBlocks < 1) + strMessage = strprintf(_("Warning: DB_CONFIG has set_lk_max_locks %lu, which may be too low for a single block. If this limit is reached, NovaCoin may stop working."), (unsigned long)nMaxLocks); + else + strMessage = strprintf(_("Warning: DB_CONFIG has set_lk_max_locks %lu, which may be too low for a common blockchain reorganization. If this limit is reached, NovaCoin may stop working."), (unsigned long)nMaxLocks); + + strMiscWarning = strMessage; + printf("*** %s\n", strMessage.c_str()); + } } - DbEnv(0).remove(GetDataDir().c_str(), 0); + + return true; +} + +void CDBEnv::MakeMock() +{ + if (fDbEnvInit) + throw runtime_error("CDBEnv::MakeMock(): already initialized"); + + if (fShutdown) + throw runtime_error("CDBEnv::MakeMock(): during shutdown"); + + printf("CDBEnv::MakeMock()\n"); + + dbenv.set_cachesize(1, 0, 1); + dbenv.set_lg_bsize(10485760*4); + dbenv.set_lg_max(10485760); + dbenv.set_lk_max_locks(10000); + dbenv.set_lk_max_objects(10000); + dbenv.set_flags(DB_AUTO_COMMIT, 1); +#ifdef DB_LOG_IN_MEMORY + dbenv.log_set_config(DB_LOG_IN_MEMORY, 1); +#endif + int ret = dbenv.open(NULL, + DB_CREATE | + DB_INIT_LOCK | + DB_INIT_LOG | + DB_INIT_MPOOL | + DB_INIT_TXN | + DB_THREAD | + DB_PRIVATE, + S_IRUSR | S_IWUSR); + if (ret > 0) + throw runtime_error(strprintf("CDBEnv::MakeMock(): error %d opening database environment", ret)); + + fDbEnvInit = true; + fMockDb = true; +} + +CDBEnv::VerifyResult CDBEnv::Verify(std::string strFile, bool (*recoverFunc)(CDBEnv& dbenv, std::string strFile)) +{ + LOCK(cs_db); + assert(mapFileUseCount.count(strFile) == 0); + + Db db(&dbenv, 0); + int result = db.verify(strFile.c_str(), NULL, NULL, 0); + if (result == 0) + return VERIFY_OK; + else if (recoverFunc == NULL) + return RECOVER_FAIL; + + // Try to recover: + bool fRecovered = (*recoverFunc)(*this, strFile); + return (fRecovered ? RECOVER_OK : RECOVER_FAIL); } -class CDBInit +bool CDBEnv::Salvage(std::string strFile, bool fAggressive, + std::vector& vResult) { -public: - CDBInit() + LOCK(cs_db); + assert(mapFileUseCount.count(strFile) == 0); + + u_int32_t flags = DB_SALVAGE; + if (fAggressive) flags |= DB_AGGRESSIVE; + + stringstream strDump; + + Db db(&dbenv, 0); + int result = db.verify(strFile.c_str(), NULL, &strDump, flags); + if (result != 0) { + printf("ERROR: db salvage failed\n"); + return false; } - ~CDBInit() + + // Format of bdb dump is ascii lines: + // header lines... + // HEADER=END + // hexadecimal key + // hexadecimal value + // ... repeated + // DATA=END + + string strLine; + while (!strDump.eof() && strLine != "HEADER=END") + getline(strDump, strLine); // Skip past header + + std::string keyHex, valueHex; + while (!strDump.eof() && keyHex != "DATA=END") { - EnvShutdown(); + getline(strDump, keyHex); + if (keyHex != "DATA_END") + { + getline(strDump, valueHex); + vResult.push_back(make_pair(ParseHex(keyHex),ParseHex(valueHex))); + } } + + return (result == 0); +} + + +void CDBEnv::CheckpointLSN(std::string strFile) +{ + dbenv.txn_checkpoint(0, 0, 0); + if (fMockDb) + return; + dbenv.lsn_reset(strFile.c_str(), 0); } -instance_of_cdbinit; -CDB::CDB(const char* pszFile, const char* pszMode) : pdb(NULL) +CDB::CDB(const char *pszFile, const char* pszMode) : + pdb(NULL), activeTxn(NULL) { int ret; if (pszFile == NULL) @@ -71,58 +259,39 @@ CDB::CDB(const char* pszFile, const char* pszMode) : pdb(NULL) if (fCreate) nFlags |= DB_CREATE; - CRITICAL_BLOCK(cs_db) { - if (!fDbEnvInit) - { - if (fShutdown) - return; - string strDataDir = GetDataDir(); - string strLogDir = strDataDir + "/database"; - filesystem::create_directory(strLogDir.c_str()); - string strErrorFile = strDataDir + "/db.log"; - printf("dbenv.open strLogDir=%s strErrorFile=%s\n", strLogDir.c_str(), strErrorFile.c_str()); - - dbenv.set_lg_dir(strLogDir.c_str()); - dbenv.set_lg_max(10000000); - dbenv.set_lk_max_locks(10000); - dbenv.set_lk_max_objects(10000); - dbenv.set_errfile(fopen(strErrorFile.c_str(), "a")); /// debug - dbenv.set_flags(DB_AUTO_COMMIT, 1); - ret = dbenv.open(strDataDir.c_str(), - DB_CREATE | - DB_INIT_LOCK | - DB_INIT_LOG | - DB_INIT_MPOOL | - DB_INIT_TXN | - DB_THREAD | - DB_RECOVER, - S_IRUSR | S_IWUSR); - if (ret > 0) - throw runtime_error(strprintf("CDB() : error %d opening database environment", ret)); - fDbEnvInit = true; - } + LOCK(bitdb.cs_db); + if (!bitdb.Open(GetDataDir())) + throw runtime_error("env open failed"); strFile = pszFile; - ++mapFileUseCount[strFile]; - pdb = mapDb[strFile]; + ++bitdb.mapFileUseCount[strFile]; + pdb = bitdb.mapDb[strFile]; if (pdb == NULL) { - pdb = new Db(&dbenv, 0); + pdb = new Db(&bitdb.dbenv, 0); + + bool fMockDb = bitdb.IsMock(); + if (fMockDb) + { + DbMpoolFile*mpf = pdb->get_mpf(); + ret = mpf->set_flags(DB_MPOOL_NOFILE, 1); + if (ret != 0) + throw runtime_error(strprintf("CDB() : failed to configure for no temp file backing for database %s", pszFile)); + } ret = pdb->open(NULL, // Txn pointer - pszFile, // Filename + fMockDb ? NULL : pszFile, // Filename "main", // Logical db name DB_BTREE, // Database type nFlags, // Flags 0); - if (ret > 0) + if (ret != 0) { delete pdb; pdb = NULL; - CRITICAL_BLOCK(cs_db) - --mapFileUseCount[strFile]; + --bitdb.mapFileUseCount[strFile]; strFile = ""; throw runtime_error(strprintf("CDB() : can't open database file %s, error %d", pszFile, ret)); } @@ -131,42 +300,53 @@ CDB::CDB(const char* pszFile, const char* pszMode) : pdb(NULL) { bool fTmp = fReadOnly; fReadOnly = false; - WriteVersion(VERSION); + WriteVersion(CLIENT_VERSION); fReadOnly = fTmp; } - mapDb[strFile] = pdb; + bitdb.mapDb[strFile] = pdb; } } } +static bool IsChainFile(std::string strFile) +{ + if (strFile == "blkindex.dat") + return true; + + return false; +} + void CDB::Close() { if (!pdb) return; - if (!vTxn.empty()) - vTxn.front()->abort(); - vTxn.clear(); + if (activeTxn) + activeTxn->abort(); + activeTxn = NULL; pdb = NULL; // Flush database activity from memory pool to disk log unsigned int nMinutes = 0; if (fReadOnly) nMinutes = 1; - if (strFile == "addr.dat") + if (IsChainFile(strFile)) nMinutes = 2; - if (strFile == "blkindex.dat" && IsInitialBlockDownload() && nBestHeight % 500 != 0) - nMinutes = 1; - dbenv.txn_checkpoint(0, nMinutes, 0); + if (IsChainFile(strFile) && IsInitialBlockDownload()) + nMinutes = 5; + + bitdb.dbenv.txn_checkpoint(nMinutes ? GetArg("-dblogsize", 100)*1024 : 0, nMinutes, 0); - CRITICAL_BLOCK(cs_db) - --mapFileUseCount[strFile]; + { + LOCK(bitdb.cs_db); + --bitdb.mapFileUseCount[strFile]; + } } -void static CloseDb(const string& strFile) +void CDBEnv::CloseDb(const string& strFile) { - CRITICAL_BLOCK(cs_db) { + LOCK(cs_db); if (mapDb[strFile] != NULL) { // Close the database handle @@ -178,27 +358,35 @@ void static CloseDb(const string& strFile) } } +bool CDBEnv::RemoveDb(const string& strFile) +{ + this->CloseDb(strFile); + + LOCK(cs_db); + int rc = dbenv.dbremove(NULL, strFile.c_str(), NULL, DB_AUTO_COMMIT); + return (rc == 0); +} + bool CDB::Rewrite(const string& strFile, const char* pszSkip) { while (!fShutdown) { - CRITICAL_BLOCK(cs_db) { - if (!mapFileUseCount.count(strFile) || mapFileUseCount[strFile] == 0) + LOCK(bitdb.cs_db); + if (!bitdb.mapFileUseCount.count(strFile) || bitdb.mapFileUseCount[strFile] == 0) { // Flush log data to the dat file - CloseDb(strFile); - dbenv.txn_checkpoint(0, 0, 0); - dbenv.lsn_reset(strFile.c_str(), 0); - mapFileUseCount.erase(strFile); + bitdb.CloseDb(strFile); + bitdb.CheckpointLSN(strFile); + bitdb.mapFileUseCount.erase(strFile); bool fSuccess = true; printf("Rewriting %s...\n", strFile.c_str()); string strFileRes = strFile + ".rewrite"; { // surround usage of db with extra {} CDB db(strFile.c_str(), "r"); - Db* pdbCopy = new Db(&dbenv, 0); - + Db* pdbCopy = new Db(&bitdb.dbenv, 0); + int ret = pdbCopy->open(NULL, // Txn pointer strFileRes.c_str(), // Filename "main", // Logical db name @@ -210,13 +398,13 @@ bool CDB::Rewrite(const string& strFile, const char* pszSkip) printf("Cannot create database file %s\n", strFileRes.c_str()); fSuccess = false; } - + Dbc* pcursor = db.GetCursor(); if (pcursor) while (fSuccess) { - CDataStream ssKey; - CDataStream ssValue; + CDataStream ssKey(SER_DISK, CLIENT_VERSION); + CDataStream ssValue(SER_DISK, CLIENT_VERSION); int ret = db.ReadAtCursor(pcursor, ssKey, ssValue, DB_NEXT); if (ret == DB_NOTFOUND) { @@ -236,7 +424,7 @@ bool CDB::Rewrite(const string& strFile, const char* pszSkip) { // Update version: ssValue.clear(); - ssValue << VERSION; + ssValue << CLIENT_VERSION; } Dbt datKey(&ssKey[0], ssKey.size()); Dbt datValue(&ssValue[0], ssValue.size()); @@ -247,7 +435,7 @@ bool CDB::Rewrite(const string& strFile, const char* pszSkip) if (fSuccess) { db.Close(); - CloseDb(strFile); + bitdb.CloseDb(strFile); if (pdbCopy->close(0)) fSuccess = false; delete pdbCopy; @@ -255,10 +443,10 @@ bool CDB::Rewrite(const string& strFile, const char* pszSkip) } if (fSuccess) { - Db dbA(&dbenv, 0); + Db dbA(&bitdb.dbenv, 0); if (dbA.remove(strFile.c_str(), NULL, 0)) fSuccess = false; - Db dbB(&dbenv, 0); + Db dbB(&bitdb.dbenv, 0); if (dbB.rename(strFileRes.c_str(), NULL, strFile.c_str(), 0)) fSuccess = false; } @@ -273,15 +461,16 @@ bool CDB::Rewrite(const string& strFile, const char* pszSkip) } -void DBFlush(bool fShutdown) +void CDBEnv::Flush(bool fShutdown) { + int64 nStart = GetTimeMillis(); // Flush log data to the actual data file // on all files that are not in use - printf("DBFlush(%s)%s\n", fShutdown ? "true" : "false", fDbEnvInit ? "" : " db not started"); + printf("Flush(%s)%s\n", fShutdown ? "true" : "false", fDbEnvInit ? "" : " db not started"); if (!fDbEnvInit) return; - CRITICAL_BLOCK(cs_db) { + LOCK(cs_db); map::iterator mi = mapFileUseCount.begin(); while (mi != mapFileUseCount.end()) { @@ -292,21 +481,27 @@ void DBFlush(bool fShutdown) { // Move log data to the dat file CloseDb(strFile); + printf("%s checkpoint\n", strFile.c_str()); dbenv.txn_checkpoint(0, 0, 0); - printf("%s flush\n", strFile.c_str()); - dbenv.lsn_reset(strFile.c_str(), 0); + if (!IsChainFile(strFile) || fDetachDB) { + printf("%s detach\n", strFile.c_str()); + if (!fMockDb) + dbenv.lsn_reset(strFile.c_str(), 0); + } + printf("%s closed\n", strFile.c_str()); mapFileUseCount.erase(mi++); } else mi++; } + printf("DBFlush(%s)%s ended %15"PRI64d"ms\n", fShutdown ? "true" : "false", fDbEnvInit ? "" : " db not started", GetTimeMillis() - nStart); if (fShutdown) { char** listp; if (mapFileUseCount.empty()) { dbenv.log_archive(&listp, DB_ARCH_REMOVE); - EnvShutdown(); + Close(); } } } @@ -358,60 +553,6 @@ bool CTxDB::ContainsTx(uint256 hash) return Exists(make_pair(string("tx"), hash)); } -bool CTxDB::ReadOwnerTxes(uint160 hash160, int nMinHeight, vector& vtx) -{ - assert(!fClient); - vtx.clear(); - - // Get cursor - Dbc* pcursor = GetCursor(); - if (!pcursor) - return false; - - unsigned int fFlags = DB_SET_RANGE; - loop - { - // Read next record - CDataStream ssKey; - if (fFlags == DB_SET_RANGE) - ssKey << string("owner") << hash160 << CDiskTxPos(0, 0, 0); - CDataStream ssValue; - int ret = ReadAtCursor(pcursor, ssKey, ssValue, fFlags); - fFlags = DB_NEXT; - if (ret == DB_NOTFOUND) - break; - else if (ret != 0) - { - pcursor->close(); - return false; - } - - // Unserialize - string strType; - uint160 hashItem; - CDiskTxPos pos; - ssKey >> strType >> hashItem >> pos; - int nItemHeight; - ssValue >> nItemHeight; - - // Read transaction - if (strType != "owner" || hashItem != hash160) - break; - if (nItemHeight >= nMinHeight) - { - vtx.resize(vtx.size()+1); - if (!vtx.back().ReadFromDisk(pos)) - { - pcursor->close(); - return false; - } - } - } - - pcursor->close(); - return true; -} - bool CTxDB::ReadDiskTx(uint256 hash, CTransaction& tx, CTxIndex& txindex) { assert(!fClient); @@ -443,11 +584,6 @@ bool CTxDB::WriteBlockIndex(const CDiskBlockIndex& blockindex) return Write(make_pair(string("blockindex"), blockindex.GetBlockHash()), blockindex); } -bool CTxDB::EraseBlockIndex(uint256 hash) -{ - return Erase(make_pair(string("blockindex"), hash)); -} - bool CTxDB::ReadHashBestChain(uint256& hashBestChain) { return Read(string("hashBestChain"), hashBestChain); @@ -458,14 +594,34 @@ bool CTxDB::WriteHashBestChain(uint256 hashBestChain) return Write(string("hashBestChain"), hashBestChain); } -bool CTxDB::ReadBestInvalidWork(CBigNum& bnBestInvalidWork) +bool CTxDB::ReadBestInvalidTrust(CBigNum& bnBestInvalidTrust) +{ + return Read(string("bnBestInvalidTrust"), bnBestInvalidTrust); +} + +bool CTxDB::WriteBestInvalidTrust(CBigNum bnBestInvalidTrust) { - return Read(string("bnBestInvalidWork"), bnBestInvalidWork); + return Write(string("bnBestInvalidTrust"), bnBestInvalidTrust); } -bool CTxDB::WriteBestInvalidWork(CBigNum bnBestInvalidWork) +bool CTxDB::ReadSyncCheckpoint(uint256& hashCheckpoint) { - return Write(string("bnBestInvalidWork"), bnBestInvalidWork); + return Read(string("hashSyncCheckpoint"), hashCheckpoint); +} + +bool CTxDB::WriteSyncCheckpoint(uint256 hashCheckpoint) +{ + return Write(string("hashSyncCheckpoint"), hashCheckpoint); +} + +bool CTxDB::ReadCheckpointPubKey(string& strPubKey) +{ + return Read(string("strCheckpointPubKey"), strPubKey); +} + +bool CTxDB::WriteCheckpointPubKey(const string& strPubKey) +{ + return Write(string("strCheckpointPubKey"), strPubKey); } CBlockIndex static * InsertBlockIndex(uint256 hash) @@ -490,63 +646,13 @@ CBlockIndex static * InsertBlockIndex(uint256 hash) bool CTxDB::LoadBlockIndex() { - // Get database cursor - Dbc* pcursor = GetCursor(); - if (!pcursor) + if (!LoadBlockIndexGuts()) return false; - // Load mapBlockIndex - unsigned int fFlags = DB_SET_RANGE; - loop - { - // Read next record - CDataStream ssKey; - if (fFlags == DB_SET_RANGE) - ssKey << make_pair(string("blockindex"), uint256(0)); - CDataStream ssValue; - int ret = ReadAtCursor(pcursor, ssKey, ssValue, fFlags); - fFlags = DB_NEXT; - if (ret == DB_NOTFOUND) - break; - else if (ret != 0) - return false; - - // Unserialize - string strType; - ssKey >> strType; - if (strType == "blockindex") - { - CDiskBlockIndex diskindex; - ssValue >> diskindex; - - // Construct block index object - CBlockIndex* pindexNew = InsertBlockIndex(diskindex.GetBlockHash()); - pindexNew->pprev = InsertBlockIndex(diskindex.hashPrev); - pindexNew->pnext = InsertBlockIndex(diskindex.hashNext); - pindexNew->nFile = diskindex.nFile; - pindexNew->nBlockPos = diskindex.nBlockPos; - pindexNew->nHeight = diskindex.nHeight; - pindexNew->nVersion = diskindex.nVersion; - pindexNew->hashMerkleRoot = diskindex.hashMerkleRoot; - pindexNew->nTime = diskindex.nTime; - pindexNew->nBits = diskindex.nBits; - pindexNew->nNonce = diskindex.nNonce; - - // Watch for genesis block - if (pindexGenesisBlock == NULL && diskindex.GetBlockHash() == hashGenesisBlock) - pindexGenesisBlock = pindexNew; - - if (!pindexNew->CheckIndex()) - return error("LoadBlockIndex() : CheckIndex failed at %d", pindexNew->nHeight); - } - else - { - break; - } - } - pcursor->close(); + if (fRequestShutdown) + return true; - // Calculate bnChainWork + // Calculate nChainTrust vector > vSortedByHeight; vSortedByHeight.reserve(mapBlockIndex.size()); BOOST_FOREACH(const PAIRTYPE(uint256, CBlockIndex*)& item, mapBlockIndex) @@ -558,7 +664,11 @@ bool CTxDB::LoadBlockIndex() BOOST_FOREACH(const PAIRTYPE(int, CBlockIndex*)& item, vSortedByHeight) { CBlockIndex* pindex = item.second; - pindex->bnChainWork = (pindex->pprev ? pindex->pprev->bnChainWork : 0) + pindex->GetBlockWork(); + pindex->nChainTrust = (pindex->pprev ? pindex->pprev->nChainTrust : 0) + pindex->GetBlockTrust(); + // ppcoin: calculate stake modifier checksum + pindex->nStakeModifierChecksum = GetStakeModifierChecksum(pindex); + if (!CheckStakeModifierCheckpoints(pindex->nHeight, pindex->nStakeModifierChecksum)) + return error("CTxDB::LoadBlockIndex() : Failed stake modifier checkpoint height=%d, modifier=0x%016"PRI64x, pindex->nHeight, pindex->nStakeModifier); } // Load hashBestChain pointer to end of best chain @@ -572,28 +682,137 @@ bool CTxDB::LoadBlockIndex() return error("CTxDB::LoadBlockIndex() : hashBestChain not found in the block index"); pindexBest = mapBlockIndex[hashBestChain]; nBestHeight = pindexBest->nHeight; - bnBestChainWork = pindexBest->bnChainWork; - printf("LoadBlockIndex(): hashBestChain=%s height=%d\n", hashBestChain.ToString().substr(0,20).c_str(), nBestHeight); + nBestChainTrust = pindexBest->nChainTrust; + printf("LoadBlockIndex(): hashBestChain=%s height=%d trust=%s date=%s\n", + hashBestChain.ToString().substr(0,20).c_str(), nBestHeight, CBigNum(nBestChainTrust).ToString().c_str(), + DateTimeStrFormat("%x %H:%M:%S", pindexBest->GetBlockTime()).c_str()); - // Load bnBestInvalidWork, OK if it doesn't exist - ReadBestInvalidWork(bnBestInvalidWork); + // ppcoin: load hashSyncCheckpoint + if (!ReadSyncCheckpoint(Checkpoints::hashSyncCheckpoint)) + return error("CTxDB::LoadBlockIndex() : hashSyncCheckpoint not loaded"); + printf("LoadBlockIndex(): synchronized checkpoint %s\n", Checkpoints::hashSyncCheckpoint.ToString().c_str()); + + // Load bnBestInvalidTrust, OK if it doesn't exist + CBigNum bnBestInvalidTrust; + ReadBestInvalidTrust(bnBestInvalidTrust); + nBestInvalidTrust = bnBestInvalidTrust.getuint256(); // 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; + map, CBlockIndex*> mapBlockPos; for (CBlockIndex* pindex = pindexBest; pindex && pindex->pprev; pindex = pindex->pprev) { - if (pindex->nHeight < nBestHeight-2500 && !mapArgs.count("-checkblocks")) + if (fRequestShutdown || pindex->nHeight < nBestHeight-nCheckDepth) break; CBlock block; if (!block.ReadFromDisk(pindex)) return error("LoadBlockIndex() : block.ReadFromDisk failed"); - if (!block.CheckBlock()) + // check level 1: verify block validity + // check level 7: verify block signature too + if (nCheckLevel>0 && !block.CheckBlock(true, true, (nCheckLevel>6))) { printf("LoadBlockIndex() : *** found bad block at %d, hash=%s\n", pindex->nHeight, pindex->GetBlockHash().ToString().c_str()); pindexFork = pindex->pprev; } + // check level 2: verify transaction index validity + if (nCheckLevel>1) + { + pair pos = make_pair(pindex->nFile, pindex->nBlockPos); + mapBlockPos[pos] = pindex; + BOOST_FOREACH(const CTransaction &tx, block.vtx) + { + uint256 hashTx = tx.GetHash(); + CTxIndex txindex; + if (ReadTxIndex(hashTx, txindex)) + { + // check level 3: checker transaction hashes + if (nCheckLevel>2 || pindex->nFile != txindex.pos.nFile || pindex->nBlockPos != txindex.pos.nBlockPos) + { + // either an error or a duplicate transaction + CTransaction txFound; + if (!txFound.ReadFromDisk(txindex.pos)) + { + printf("LoadBlockIndex() : *** cannot read mislocated transaction %s\n", hashTx.ToString().c_str()); + pindexFork = pindex->pprev; + } + else + if (txFound.GetHash() != hashTx) // not a duplicate tx + { + printf("LoadBlockIndex(): *** invalid tx position for %s\n", hashTx.ToString().c_str()); + pindexFork = pindex->pprev; + } + } + // check level 4: check whether spent txouts were spent within the main chain + unsigned int nOutput = 0; + if (nCheckLevel>3) + { + BOOST_FOREACH(const CDiskTxPos &txpos, txindex.vSpent) + { + if (!txpos.IsNull()) + { + pair posFind = make_pair(txpos.nFile, txpos.nBlockPos); + if (!mapBlockPos.count(posFind)) + { + printf("LoadBlockIndex(): *** found bad spend at %d, hashBlock=%s, hashTx=%s\n", pindex->nHeight, pindex->GetBlockHash().ToString().c_str(), hashTx.ToString().c_str()); + pindexFork = pindex->pprev; + } + // check level 6: check whether spent txouts were spent by a valid transaction that consume them + if (nCheckLevel>5) + { + CTransaction txSpend; + if (!txSpend.ReadFromDisk(txpos)) + { + printf("LoadBlockIndex(): *** cannot read spending transaction of %s:%i from disk\n", hashTx.ToString().c_str(), nOutput); + pindexFork = pindex->pprev; + } + else if (!txSpend.CheckTransaction()) + { + printf("LoadBlockIndex(): *** spending transaction of %s:%i is invalid\n", hashTx.ToString().c_str(), nOutput); + pindexFork = pindex->pprev; + } + else + { + bool fFound = false; + BOOST_FOREACH(const CTxIn &txin, txSpend.vin) + if (txin.prevout.hash == hashTx && txin.prevout.n == nOutput) + fFound = true; + if (!fFound) + { + printf("LoadBlockIndex(): *** spending transaction of %s:%i does not spend it\n", hashTx.ToString().c_str(), nOutput); + pindexFork = pindex->pprev; + } + } + } + } + nOutput++; + } + } + } + // check level 5: check whether all prevouts are marked spent + if (nCheckLevel>4) + { + BOOST_FOREACH(const CTxIn &txin, tx.vin) + { + CTxIndex txindex; + if (ReadTxIndex(txin.prevout.hash, txindex)) + if (txindex.vSpent.size()-1 < txin.prevout.n || txindex.vSpent[txin.prevout.n].IsNull()) + { + printf("LoadBlockIndex(): *** found unspent prevout %s:%i in %s\n", txin.prevout.hash.ToString().c_str(), txin.prevout.n, hashTx.ToString().c_str()); + pindexFork = pindex->pprev; + } + } + } + } + } } - if (pindexFork) + if (pindexFork && !fRequestShutdown) { // Reorg back to the fork printf("LoadBlockIndex() : *** moving best chain pointer back to block %d\n", pindexFork->nHeight); @@ -609,461 +828,186 @@ bool CTxDB::LoadBlockIndex() - - -// -// CAddrDB -// - -bool CAddrDB::WriteAddress(const CAddress& addr) +bool CTxDB::LoadBlockIndexGuts() { - return Write(make_pair(string("addr"), addr.GetKey()), addr); -} - -bool CAddrDB::EraseAddress(const CAddress& addr) -{ - return Erase(make_pair(string("addr"), addr.GetKey())); -} - -bool CAddrDB::LoadAddresses() -{ - CRITICAL_BLOCK(cs_mapAddresses) - { - // Get cursor - Dbc* pcursor = GetCursor(); - if (!pcursor) - return false; - - loop - { - // Read next record - CDataStream ssKey; - CDataStream ssValue; - int ret = ReadAtCursor(pcursor, ssKey, ssValue); - if (ret == DB_NOTFOUND) - break; - else if (ret != 0) - return false; - - // Unserialize - string strType; - ssKey >> strType; - if (strType == "addr") - { - CAddress addr; - ssValue >> addr; - mapAddresses.insert(make_pair(addr.GetKey(), addr)); - } - } - pcursor->close(); - - printf("Loaded %d addresses\n", mapAddresses.size()); - } - - return true; -} - -bool LoadAddresses() -{ - return CAddrDB("cr+").LoadAddresses(); -} - - - - -// -// CWalletDB -// - -bool CWalletDB::WriteName(const string& strAddress, const string& strName) -{ - nWalletDBUpdated++; - return Write(make_pair(string("name"), strAddress), strName); -} - -bool CWalletDB::EraseName(const string& strAddress) -{ - // This should only be used for sending addresses, never for receiving addresses, - // receiving addresses must always have an address book entry if they're not change return. - nWalletDBUpdated++; - return Erase(make_pair(string("name"), strAddress)); -} - -bool CWalletDB::ReadAccount(const string& strAccount, CAccount& account) -{ - account.SetNull(); - return Read(make_pair(string("acc"), strAccount), account); -} - -bool CWalletDB::WriteAccount(const string& strAccount, const CAccount& account) -{ - return Write(make_pair(string("acc"), strAccount), account); -} - -bool CWalletDB::WriteAccountingEntry(const CAccountingEntry& acentry) -{ - return Write(boost::make_tuple(string("acentry"), acentry.strAccount, ++nAccountingEntryNumber), acentry); -} - -int64 CWalletDB::GetAccountCreditDebit(const string& strAccount) -{ - list entries; - ListAccountCreditDebit(strAccount, entries); - - int64 nCreditDebit = 0; - BOOST_FOREACH (const CAccountingEntry& entry, entries) - nCreditDebit += entry.nCreditDebit; - - return nCreditDebit; -} - -void CWalletDB::ListAccountCreditDebit(const string& strAccount, list& entries) -{ - bool fAllAccounts = (strAccount == "*"); - + // Get database cursor Dbc* pcursor = GetCursor(); if (!pcursor) - throw runtime_error("CWalletDB::ListAccountCreditDebit() : cannot create DB cursor"); + return false; + + // Load mapBlockIndex unsigned int fFlags = DB_SET_RANGE; - loop + while (true) { // Read next record - CDataStream ssKey; + CDataStream ssKey(SER_DISK, CLIENT_VERSION); if (fFlags == DB_SET_RANGE) - ssKey << boost::make_tuple(string("acentry"), (fAllAccounts? string("") : strAccount), uint64(0)); - CDataStream ssValue; + ssKey << make_pair(string("blockindex"), 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) - { - pcursor->close(); - throw runtime_error("CWalletDB::ListAccountCreditDebit() : error scanning DB"); - } + return false; // Unserialize + + try { string strType; ssKey >> strType; - if (strType != "acentry") - break; - CAccountingEntry acentry; - ssKey >> acentry.strAccount; - if (!fAllAccounts && acentry.strAccount != strAccount) - break; - - ssValue >> acentry; - entries.push_back(acentry); - } + if (strType == "blockindex" && !fRequestShutdown) + { + CDiskBlockIndex diskindex; + ssValue >> diskindex; - pcursor->close(); -} + // Construct block index object + CBlockIndex* pindexNew = InsertBlockIndex(diskindex.GetBlockHash()); + pindexNew->pprev = InsertBlockIndex(diskindex.hashPrev); + pindexNew->pnext = InsertBlockIndex(diskindex.hashNext); + pindexNew->nFile = diskindex.nFile; + pindexNew->nBlockPos = diskindex.nBlockPos; + pindexNew->nHeight = diskindex.nHeight; + pindexNew->nMint = diskindex.nMint; + pindexNew->nMoneySupply = diskindex.nMoneySupply; + pindexNew->nFlags = diskindex.nFlags; + pindexNew->nStakeModifier = diskindex.nStakeModifier; + pindexNew->prevoutStake = diskindex.prevoutStake; + pindexNew->nStakeTime = diskindex.nStakeTime; + pindexNew->hashProofOfStake = diskindex.hashProofOfStake; + pindexNew->nVersion = diskindex.nVersion; + pindexNew->hashMerkleRoot = diskindex.hashMerkleRoot; + pindexNew->nTime = diskindex.nTime; + pindexNew->nBits = diskindex.nBits; + pindexNew->nNonce = diskindex.nNonce; + // Watch for genesis block + if (pindexGenesisBlock == NULL && diskindex.GetBlockHash() == (!fTestNet ? hashGenesisBlock : hashGenesisBlockTestNet)) + pindexGenesisBlock = pindexNew; -int CWalletDB::LoadWallet(CWallet* pwallet) -{ - pwallet->vchDefaultKey.clear(); - int nFileVersion = 0; - vector vWalletUpgrade; - bool fIsEncrypted = false; + if (!pindexNew->CheckIndex()) + return error("LoadBlockIndex() : CheckIndex failed at %d", pindexNew->nHeight); - // Modify defaults -#ifndef WIN32 - // Tray icon sometimes disappears on 9.10 karmic koala 64-bit, leaving no way to access the program - fMinimizeToTray = false; - fMinimizeOnClose = false; -#endif + // ppcoin: build setStakeSeen + if (pindexNew->IsProofOfStake()) + setStakeSeen.insert(make_pair(pindexNew->prevoutStake, pindexNew->nStakeTime)); + } + else + { + break; // if shutdown requested or finished loading block index + } + } // try + catch (std::exception &e) { + return error("%s() : deserialize error", __PRETTY_FUNCTION__); + } + } + pcursor->close(); - //// todo: shouldn't we catch exceptions and try to recover and continue? - CRITICAL_BLOCK(pwallet->cs_wallet) - { - // Get cursor - Dbc* pcursor = GetCursor(); - if (!pcursor) - return DB_CORRUPT; + return true; +} - loop - { - // Read next record - CDataStream ssKey; - CDataStream ssValue; - int ret = ReadAtCursor(pcursor, ssKey, ssValue); - if (ret == DB_NOTFOUND) - break; - else if (ret != 0) - return DB_CORRUPT; - - // Unserialize - // Taking advantage of the fact that pair serialization - // is just the two items serialized one after the other - string strType; - ssKey >> strType; - if (strType == "name") - { - string strAddress; - ssKey >> strAddress; - ssValue >> pwallet->mapAddressBook[strAddress]; - } - else if (strType == "tx") - { - uint256 hash; - ssKey >> hash; - CWalletTx& wtx = pwallet->mapWallet[hash]; - ssValue >> wtx; - wtx.pwallet = pwallet; - if (wtx.GetHash() != hash) - printf("Error in wallet.dat, hash mismatch\n"); - // Undo serialize changes in 31600 - if (31404 <= wtx.fTimeReceivedIsTxTime && wtx.fTimeReceivedIsTxTime <= 31703) - { - if (!ssValue.empty()) - { - char fTmp; - char fUnused; - ssValue >> fTmp >> fUnused >> wtx.strFromAccount; - printf("LoadWallet() upgrading tx ver=%d %d '%s' %s\n", wtx.fTimeReceivedIsTxTime, fTmp, wtx.strFromAccount.c_str(), hash.ToString().c_str()); - wtx.fTimeReceivedIsTxTime = fTmp; - } - else - { - printf("LoadWallet() repairing tx ver=%d %s\n", wtx.fTimeReceivedIsTxTime, hash.ToString().c_str()); - wtx.fTimeReceivedIsTxTime = 0; - } - vWalletUpgrade.push_back(hash); - } - //// debug print - //printf("LoadWallet %s\n", wtx.GetHash().ToString().c_str()); - //printf(" %12I64d %s %s %s\n", - // wtx.vout[0].nValue, - // DateTimeStrFormat("%x %H:%M:%S", wtx.GetBlockTime()).c_str(), - // wtx.hashBlock.ToString().substr(0,20).c_str(), - // wtx.mapValue["message"].c_str()); - } - else if (strType == "acentry") - { - string strAccount; - ssKey >> strAccount; - uint64 nNumber; - ssKey >> nNumber; - if (nNumber > nAccountingEntryNumber) - nAccountingEntryNumber = nNumber; - } - else if (strType == "key" || strType == "wkey") - { - vector vchPubKey; - ssKey >> vchPubKey; - CKey key; - if (strType == "key") - { - CPrivKey pkey; - ssValue >> pkey; - key.SetPrivKey(pkey); - if (key.GetPubKey() != vchPubKey || !key.IsValid()) - return DB_CORRUPT; - } - else - { - CWalletKey wkey; - ssValue >> wkey; - key.SetPrivKey(wkey.vchPrivKey); - if (key.GetPubKey() != vchPubKey || !key.IsValid()) - return DB_CORRUPT; - } - if (!pwallet->LoadKey(key)) - return DB_CORRUPT; - } - else if (strType == "mkey") - { - unsigned int nID; - ssKey >> nID; - CMasterKey kMasterKey; - ssValue >> kMasterKey; - if(pwallet->mapMasterKeys.count(nID) != 0) - return DB_CORRUPT; - pwallet->mapMasterKeys[nID] = kMasterKey; - if (pwallet->nMasterKeyMaxID < nID) - pwallet->nMasterKeyMaxID = nID; - } - else if (strType == "ckey") - { - vector vchPubKey; - ssKey >> vchPubKey; - vector vchPrivKey; - ssValue >> vchPrivKey; - if (!pwallet->LoadCryptedKey(vchPubKey, vchPrivKey)) - return DB_CORRUPT; - fIsEncrypted = true; - } - else if (strType == "defaultkey") - { - ssValue >> pwallet->vchDefaultKey; - } - else if (strType == "pool") - { - int64 nIndex; - ssKey >> nIndex; - pwallet->setKeyPool.insert(nIndex); - } - else if (strType == "version") - { - ssValue >> nFileVersion; - if (nFileVersion == 10300) - nFileVersion = 300; - } - else if (strType == "setting") - { - string strKey; - ssKey >> strKey; - // Options -#ifndef QT_GUI - if (strKey == "fGenerateBitcoins") ssValue >> fGenerateBitcoins; -#endif - if (strKey == "nTransactionFee") ssValue >> nTransactionFee; - if (strKey == "fLimitProcessors") ssValue >> fLimitProcessors; - if (strKey == "nLimitProcessors") ssValue >> nLimitProcessors; - if (strKey == "fMinimizeToTray") ssValue >> fMinimizeToTray; - if (strKey == "fMinimizeOnClose") ssValue >> fMinimizeOnClose; - if (strKey == "fUseProxy") ssValue >> fUseProxy; - if (strKey == "addrProxy") ssValue >> addrProxy; - if (fHaveUPnP && strKey == "fUseUPnP") ssValue >> fUseUPnP; - } - else if (strType == "minversion") - { - int nMinVersion = 0; - ssValue >> nMinVersion; - if (nMinVersion > VERSION) - return DB_TOO_NEW; - } - } - pcursor->close(); - } +// +// CAddrDB +// - BOOST_FOREACH(uint256 hash, vWalletUpgrade) - WriteTx(hash, pwallet->mapWallet[hash]); - printf("nFileVersion = %d\n", nFileVersion); - printf("fGenerateBitcoins = %d\n", fGenerateBitcoins); - printf("nTransactionFee = %"PRI64d"\n", nTransactionFee); - printf("fMinimizeToTray = %d\n", fMinimizeToTray); - printf("fMinimizeOnClose = %d\n", fMinimizeOnClose); - printf("fUseProxy = %d\n", fUseProxy); - printf("addrProxy = %s\n", addrProxy.ToString().c_str()); - if (fHaveUPnP) - printf("fUseUPnP = %d\n", fUseUPnP); +CAddrDB::CAddrDB() +{ + pathAddr = GetDataDir() / "peers.dat"; +} +bool CAddrDB::Write(const CAddrMan& addr) +{ + // Generate random temporary filename + unsigned short randv = 0; + RAND_bytes((unsigned char *)&randv, sizeof(randv)); + std::string tmpfn = strprintf("peers.dat.%04x", randv); - // Rewrite encrypted wallets of versions 0.4.0 and 0.5.0rc: - if (fIsEncrypted && (nFileVersion == 40000 || nFileVersion == 50000)) - return DB_NEED_REWRITE; + // serialize addresses, checksum data up to that point, then append csum + CDataStream ssPeers(SER_DISK, CLIENT_VERSION); + ssPeers << FLATDATA(pchMessageStart); + ssPeers << addr; + uint256 hash = Hash(ssPeers.begin(), ssPeers.end()); + ssPeers << hash; - if (nFileVersion < VERSION) // Update - { - // Get rid of old debug.log file in current directory - if (nFileVersion <= 105 && !pszSetDataDir[0]) - unlink("debug.log"); + // open temp output file, and associate with CAutoFile + boost::filesystem::path pathTmp = GetDataDir() / tmpfn; + FILE *file = fopen(pathTmp.string().c_str(), "wb"); + CAutoFile fileout = CAutoFile(file, SER_DISK, CLIENT_VERSION); + if (!fileout) + return error("CAddrman::Write() : open failed"); - WriteVersion(VERSION); + // Write and commit header, data + try { + fileout << ssPeers; + } + catch (std::exception &e) { + return error("CAddrman::Write() : I/O error"); } + FileCommit(fileout); + fileout.fclose(); + + // replace existing peers.dat, if any, with new peers.dat.XXXX + if (!RenameOver(pathTmp, pathAddr)) + return error("CAddrman::Write() : Rename-into-place failed"); - return DB_LOAD_OK; + return true; } -void ThreadFlushWalletDB(void* parg) +bool CAddrDB::Read(CAddrMan& addr) { - const string& strFile = ((const string*)parg)[0]; - static bool fOneThread; - if (fOneThread) - return; - fOneThread = true; - if (mapArgs.count("-noflushwallet")) - return; + // open input file, and associate with CAutoFile + FILE *file = fopen(pathAddr.string().c_str(), "rb"); + CAutoFile filein = CAutoFile(file, SER_DISK, CLIENT_VERSION); + if (!filein) + return error("CAddrman::Read() : open failed"); - unsigned int nLastSeen = nWalletDBUpdated; - unsigned int nLastFlushed = nWalletDBUpdated; - int64 nLastWalletUpdate = GetTime(); - while (!fShutdown) - { - Sleep(500); + // use file size to size memory buffer + int fileSize = GetFilesize(filein); + int dataSize = fileSize - sizeof(uint256); + //Don't try to resize to a negative number if file is small + if ( dataSize < 0 ) dataSize = 0; + vector vchData; + vchData.resize(dataSize); + uint256 hashIn; - if (nLastSeen != nWalletDBUpdated) - { - nLastSeen = nWalletDBUpdated; - nLastWalletUpdate = GetTime(); - } + // read data and checksum from file + try { + filein.read((char *)&vchData[0], dataSize); + filein >> hashIn; + } + catch (std::exception &e) { + return error("CAddrman::Read() 2 : I/O error or stream data corrupted"); + } + filein.fclose(); - if (nLastFlushed != nWalletDBUpdated && GetTime() - nLastWalletUpdate >= 2) - { - TRY_CRITICAL_BLOCK(cs_db) - { - // Don't do this if any databases are in use - int nRefCount = 0; - map::iterator mi = mapFileUseCount.begin(); - while (mi != mapFileUseCount.end()) - { - nRefCount += (*mi).second; - mi++; - } + CDataStream ssPeers(vchData, SER_DISK, CLIENT_VERSION); - if (nRefCount == 0 && !fShutdown) - { - map::iterator mi = mapFileUseCount.find(strFile); - if (mi != mapFileUseCount.end()) - { - printf("%s ", DateTimeStrFormat("%x %H:%M:%S", GetTime()).c_str()); - printf("Flushing wallet.dat\n"); - nLastFlushed = nWalletDBUpdated; - int64 nStart = GetTimeMillis(); - - // Flush wallet.dat so it's self contained - CloseDb(strFile); - dbenv.txn_checkpoint(0, 0, 0); - dbenv.lsn_reset(strFile.c_str(), 0); + // verify stored checksum matches input data + uint256 hashTmp = Hash(ssPeers.begin(), ssPeers.end()); + if (hashIn != hashTmp) + return error("CAddrman::Read() : checksum mismatch; data corrupted"); - mapFileUseCount.erase(mi++); - printf("Flushed wallet.dat %"PRI64d"ms\n", GetTimeMillis() - nStart); - } - } - } - } - } -} + unsigned char pchMsgTmp[4]; + try { + // de-serialize file header (pchMessageStart magic number) and + ssPeers >> FLATDATA(pchMsgTmp); -bool BackupWallet(const CWallet& wallet, const string& strDest) -{ - if (!wallet.fFileBacked) - return false; - while (!fShutdown) - { - CRITICAL_BLOCK(cs_db) - { - if (!mapFileUseCount.count(wallet.strWalletFile) || mapFileUseCount[wallet.strWalletFile] == 0) - { - // Flush log data to the dat file - CloseDb(wallet.strWalletFile); - dbenv.txn_checkpoint(0, 0, 0); - dbenv.lsn_reset(wallet.strWalletFile.c_str(), 0); - mapFileUseCount.erase(wallet.strWalletFile); - - // Copy wallet.dat - filesystem::path pathSrc(GetDataDir() + "/" + wallet.strWalletFile); - filesystem::path pathDest(strDest); - if (filesystem::is_directory(pathDest)) - pathDest = pathDest / wallet.strWalletFile; -#if BOOST_VERSION >= 104000 - filesystem::copy_file(pathSrc, pathDest, filesystem::copy_option::overwrite_if_exists); -#else - filesystem::copy_file(pathSrc, pathDest); -#endif - printf("copied wallet.dat to %s\n", pathDest.string().c_str()); + // verify the network matches ours + if (memcmp(pchMsgTmp, pchMessageStart, sizeof(pchMsgTmp))) + return error("CAddrman::Read() : invalid network magic number"); - return true; - } - } - Sleep(100); + // de-serialize address data into one CAddrMan object + ssPeers >> addr; } - return false; + catch (std::exception &e) { + return error("CAddrman::Read() : I/O error or stream data corrupted"); + } + + return true; } +