1 // Copyright (c) 2009-2010 Satoshi Nakamoto
2 // Copyright (c) 2011 The Bitcoin developers
3 // Copyright (c) 2011 The PPCoin developers
4 // Distributed under the MIT/X11 software license, see the accompanying
5 // file license.txt or http://www.opensource.org/licenses/mit-license.php.
10 #include <boost/filesystem.hpp>
11 #include <boost/filesystem/fstream.hpp>
14 using namespace boost;
17 unsigned int nWalletDBUpdated;
18 uint64 nAccountingEntryNumber = 0;
26 static CCriticalSection cs_db;
27 static bool fDbEnvInit = false;
29 static map<string, int> mapFileUseCount;
30 static map<string, Db*> mapDb;
32 static void EnvShutdown()
42 catch (const DbException& e)
44 printf("EnvShutdown exception: %s (%d)\n", e.what(), e.get_errno());
46 DbEnv(0).remove(GetDataDir().c_str(), 0);
63 CDB::CDB(const char* pszFile, const char* pszMode) : pdb(NULL)
69 fReadOnly = (!strchr(pszMode, '+') && !strchr(pszMode, 'w'));
70 bool fCreate = strchr(pszMode, 'c');
71 unsigned int nFlags = DB_THREAD;
81 string strDataDir = GetDataDir();
82 string strLogDir = strDataDir + "/database";
83 filesystem::create_directory(strLogDir.c_str());
84 string strErrorFile = strDataDir + "/db.log";
85 printf("dbenv.open strLogDir=%s strErrorFile=%s\n", strLogDir.c_str(), strErrorFile.c_str());
87 dbenv.set_lg_dir(strLogDir.c_str());
88 dbenv.set_lg_max(10000000);
89 dbenv.set_lk_max_locks(10000);
90 dbenv.set_lk_max_objects(10000);
91 dbenv.set_errfile(fopen(strErrorFile.c_str(), "a")); /// debug
92 dbenv.set_flags(DB_AUTO_COMMIT, 1);
93 ret = dbenv.open(strDataDir.c_str(),
103 throw runtime_error(strprintf("CDB() : error %d opening database environment", ret));
108 ++mapFileUseCount[strFile];
109 pdb = mapDb[strFile];
112 pdb = new Db(&dbenv, 0);
114 ret = pdb->open(NULL, // Txn pointer
116 "main", // Logical db name
117 DB_BTREE, // Database type
125 CRITICAL_BLOCK(cs_db)
126 --mapFileUseCount[strFile];
128 throw runtime_error(strprintf("CDB() : can't open database file %s, error %d", pszFile, ret));
131 if (fCreate && !Exists(string("version")))
133 bool fTmp = fReadOnly;
135 WriteVersion(VERSION);
139 mapDb[strFile] = pdb;
149 vTxn.front()->abort();
153 // Flush database activity from memory pool to disk log
154 unsigned int nMinutes = 0;
157 if (strFile == "addr.dat")
159 if (strFile == "blkindex.dat" && IsInitialBlockDownload() && nBestHeight % 500 != 0)
161 dbenv.txn_checkpoint(0, nMinutes, 0);
163 CRITICAL_BLOCK(cs_db)
164 --mapFileUseCount[strFile];
167 void static CloseDb(const string& strFile)
169 CRITICAL_BLOCK(cs_db)
171 if (mapDb[strFile] != NULL)
173 // Close the database handle
174 Db* pdb = mapDb[strFile];
177 mapDb[strFile] = NULL;
182 bool CDB::Rewrite(const string& strFile, const char* pszSkip)
186 CRITICAL_BLOCK(cs_db)
188 if (!mapFileUseCount.count(strFile) || mapFileUseCount[strFile] == 0)
190 // Flush log data to the dat file
192 dbenv.txn_checkpoint(0, 0, 0);
193 dbenv.lsn_reset(strFile.c_str(), 0);
194 mapFileUseCount.erase(strFile);
196 bool fSuccess = true;
197 printf("Rewriting %s...\n", strFile.c_str());
198 string strFileRes = strFile + ".rewrite";
199 { // surround usage of db with extra {}
200 CDB db(strFile.c_str(), "r");
201 Db* pdbCopy = new Db(&dbenv, 0);
203 int ret = pdbCopy->open(NULL, // Txn pointer
204 strFileRes.c_str(), // Filename
205 "main", // Logical db name
206 DB_BTREE, // Database type
211 printf("Cannot create database file %s\n", strFileRes.c_str());
215 Dbc* pcursor = db.GetCursor();
221 int ret = db.ReadAtCursor(pcursor, ssKey, ssValue, DB_NEXT);
222 if (ret == DB_NOTFOUND)
234 strncmp(&ssKey[0], pszSkip, std::min(ssKey.size(), strlen(pszSkip))) == 0)
236 if (strncmp(&ssKey[0], "\x07version", 8) == 0)
242 Dbt datKey(&ssKey[0], ssKey.size());
243 Dbt datValue(&ssValue[0], ssValue.size());
244 int ret2 = pdbCopy->put(NULL, &datKey, &datValue, DB_NOOVERWRITE);
252 if (pdbCopy->close(0))
260 if (dbA.remove(strFile.c_str(), NULL, 0))
263 if (dbB.rename(strFileRes.c_str(), NULL, strFile.c_str(), 0))
267 printf("Rewriting of %s FAILED!\n", strFileRes.c_str());
277 void DBFlush(bool fShutdown)
279 // Flush log data to the actual data file
280 // on all files that are not in use
281 printf("DBFlush(%s)%s\n", fShutdown ? "true" : "false", fDbEnvInit ? "" : " db not started");
284 CRITICAL_BLOCK(cs_db)
286 map<string, int>::iterator mi = mapFileUseCount.begin();
287 while (mi != mapFileUseCount.end())
289 string strFile = (*mi).first;
290 int nRefCount = (*mi).second;
291 printf("%s refcount=%d\n", strFile.c_str(), nRefCount);
294 // Move log data to the dat file
296 dbenv.txn_checkpoint(0, 0, 0);
297 printf("%s flush\n", strFile.c_str());
298 dbenv.lsn_reset(strFile.c_str(), 0);
299 mapFileUseCount.erase(mi++);
307 if (mapFileUseCount.empty())
309 dbenv.log_archive(&listp, DB_ARCH_REMOVE);
325 bool CTxDB::ReadTxIndex(uint256 hash, CTxIndex& txindex)
329 return Read(make_pair(string("tx"), hash), txindex);
332 bool CTxDB::UpdateTxIndex(uint256 hash, const CTxIndex& txindex)
335 return Write(make_pair(string("tx"), hash), txindex);
338 bool CTxDB::AddTxIndex(const CTransaction& tx, const CDiskTxPos& pos, int nHeight)
343 uint256 hash = tx.GetHash();
344 CTxIndex txindex(pos, tx.vout.size());
345 return Write(make_pair(string("tx"), hash), txindex);
348 bool CTxDB::EraseTxIndex(const CTransaction& tx)
351 uint256 hash = tx.GetHash();
353 return Erase(make_pair(string("tx"), hash));
356 bool CTxDB::ContainsTx(uint256 hash)
359 return Exists(make_pair(string("tx"), hash));
362 bool CTxDB::ReadOwnerTxes(uint160 hash160, int nMinHeight, vector<CTransaction>& vtx)
368 Dbc* pcursor = GetCursor();
372 unsigned int fFlags = DB_SET_RANGE;
377 if (fFlags == DB_SET_RANGE)
378 ssKey << string("owner") << hash160 << CDiskTxPos(0, 0, 0);
380 int ret = ReadAtCursor(pcursor, ssKey, ssValue, fFlags);
382 if (ret == DB_NOTFOUND)
394 ssKey >> strType >> hashItem >> pos;
396 ssValue >> nItemHeight;
399 if (strType != "owner" || hashItem != hash160)
401 if (nItemHeight >= nMinHeight)
403 vtx.resize(vtx.size()+1);
404 if (!vtx.back().ReadFromDisk(pos))
416 bool CTxDB::ReadDiskTx(uint256 hash, CTransaction& tx, CTxIndex& txindex)
420 if (!ReadTxIndex(hash, txindex))
422 return (tx.ReadFromDisk(txindex.pos));
425 bool CTxDB::ReadDiskTx(uint256 hash, CTransaction& tx)
428 return ReadDiskTx(hash, tx, txindex);
431 bool CTxDB::ReadDiskTx(COutPoint outpoint, CTransaction& tx, CTxIndex& txindex)
433 return ReadDiskTx(outpoint.hash, tx, txindex);
436 bool CTxDB::ReadDiskTx(COutPoint outpoint, CTransaction& tx)
439 return ReadDiskTx(outpoint.hash, tx, txindex);
442 bool CTxDB::WriteBlockIndex(const CDiskBlockIndex& blockindex)
444 return Write(make_pair(string("blockindex"), blockindex.GetBlockHash()), blockindex);
447 bool CTxDB::EraseBlockIndex(uint256 hash)
449 return Erase(make_pair(string("blockindex"), hash));
452 bool CTxDB::ReadHashBestChain(uint256& hashBestChain)
454 return Read(string("hashBestChain"), hashBestChain);
457 bool CTxDB::WriteHashBestChain(uint256 hashBestChain)
459 return Write(string("hashBestChain"), hashBestChain);
462 bool CTxDB::ReadBestInvalidTrust(uint64& nBestInvalidTrust)
464 return Read(string("nBestInvalidTrust"), nBestInvalidTrust);
467 bool CTxDB::WriteBestInvalidTrust(uint64 nBestInvalidTrust)
469 return Write(string("nBestInvalidTrust"), nBestInvalidTrust);
472 CBlockIndex static * InsertBlockIndex(uint256 hash)
478 map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.find(hash);
479 if (mi != mapBlockIndex.end())
483 CBlockIndex* pindexNew = new CBlockIndex();
485 throw runtime_error("LoadBlockIndex() : new CBlockIndex failed");
486 mi = mapBlockIndex.insert(make_pair(hash, pindexNew)).first;
487 pindexNew->phashBlock = &((*mi).first);
492 bool CTxDB::LoadBlockIndex()
494 // Get database cursor
495 Dbc* pcursor = GetCursor();
499 // Load mapBlockIndex
500 unsigned int fFlags = DB_SET_RANGE;
505 if (fFlags == DB_SET_RANGE)
506 ssKey << make_pair(string("blockindex"), uint256(0));
508 int ret = ReadAtCursor(pcursor, ssKey, ssValue, fFlags);
510 if (ret == DB_NOTFOUND)
518 if (strType == "blockindex")
520 CDiskBlockIndex diskindex;
521 ssValue >> diskindex;
523 // Construct block index object
524 CBlockIndex* pindexNew = InsertBlockIndex(diskindex.GetBlockHash());
525 pindexNew->pprev = InsertBlockIndex(diskindex.hashPrev);
526 pindexNew->pnext = InsertBlockIndex(diskindex.hashNext);
527 pindexNew->nFile = diskindex.nFile;
528 pindexNew->nBlockPos = diskindex.nBlockPos;
529 pindexNew->nChainTrust = diskindex.nChainTrust;
530 pindexNew->nHeight = diskindex.nHeight;
531 pindexNew->nVersion = diskindex.nVersion;
532 pindexNew->hashMerkleRoot = diskindex.hashMerkleRoot;
533 pindexNew->nTime = diskindex.nTime;
534 pindexNew->nBits = diskindex.nBits;
535 pindexNew->nNonce = diskindex.nNonce;
537 // Watch for genesis block
538 if (pindexGenesisBlock == NULL && diskindex.GetBlockHash() == hashGenesisBlock)
539 pindexGenesisBlock = pindexNew;
541 if (!pindexNew->CheckIndex())
542 return error("LoadBlockIndex() : CheckIndex failed at %d", pindexNew->nHeight);
551 // Load hashBestChain pointer to end of best chain
552 if (!ReadHashBestChain(hashBestChain))
554 if (pindexGenesisBlock == NULL)
556 return error("CTxDB::LoadBlockIndex() : hashBestChain not loaded");
558 if (!mapBlockIndex.count(hashBestChain))
559 return error("CTxDB::LoadBlockIndex() : hashBestChain not found in the block index");
560 pindexBest = mapBlockIndex[hashBestChain];
561 nBestHeight = pindexBest->nHeight;
562 nBestChainTrust = pindexBest->nChainTrust;
563 printf("LoadBlockIndex(): hashBestChain=%s height=%d\n", hashBestChain.ToString().substr(0,20).c_str(), nBestHeight);
565 // Load nBestInvalidTrust, OK if it doesn't exist
566 ReadBestInvalidTrust(nBestInvalidTrust);
568 // Verify blocks in the best chain
569 CBlockIndex* pindexFork = NULL;
570 for (CBlockIndex* pindex = pindexBest; pindex && pindex->pprev; pindex = pindex->pprev)
572 if (pindex->nHeight < nBestHeight-2500 && !mapArgs.count("-checkblocks"))
575 if (!block.ReadFromDisk(pindex))
576 return error("LoadBlockIndex() : block.ReadFromDisk failed");
577 if (!block.CheckBlock())
579 printf("LoadBlockIndex() : *** found bad block at %d, hash=%s\n", pindex->nHeight, pindex->GetBlockHash().ToString().c_str());
580 pindexFork = pindex->pprev;
585 // Reorg back to the fork
586 printf("LoadBlockIndex() : *** moving best chain pointer back to block %d\n", pindexFork->nHeight);
588 if (!block.ReadFromDisk(pindexFork))
589 return error("LoadBlockIndex() : block.ReadFromDisk failed");
591 block.SetBestChain(txdb, pindexFork);
605 bool CAddrDB::WriteAddress(const CAddress& addr)
607 return Write(make_pair(string("addr"), addr.GetKey()), addr);
610 bool CAddrDB::EraseAddress(const CAddress& addr)
612 return Erase(make_pair(string("addr"), addr.GetKey()));
615 bool CAddrDB::LoadAddresses()
617 CRITICAL_BLOCK(cs_mapAddresses)
620 Dbc* pcursor = GetCursor();
629 int ret = ReadAtCursor(pcursor, ssKey, ssValue);
630 if (ret == DB_NOTFOUND)
638 if (strType == "addr")
642 mapAddresses.insert(make_pair(addr.GetKey(), addr));
647 printf("Loaded %d addresses\n", mapAddresses.size());
655 return CAddrDB("cr+").LoadAddresses();
665 bool CWalletDB::WriteName(const string& strAddress, const string& strName)
668 return Write(make_pair(string("name"), strAddress), strName);
671 bool CWalletDB::EraseName(const string& strAddress)
673 // This should only be used for sending addresses, never for receiving addresses,
674 // receiving addresses must always have an address book entry if they're not change return.
676 return Erase(make_pair(string("name"), strAddress));
679 bool CWalletDB::ReadAccount(const string& strAccount, CAccount& account)
682 return Read(make_pair(string("acc"), strAccount), account);
685 bool CWalletDB::WriteAccount(const string& strAccount, const CAccount& account)
687 return Write(make_pair(string("acc"), strAccount), account);
690 bool CWalletDB::WriteAccountingEntry(const CAccountingEntry& acentry)
692 return Write(boost::make_tuple(string("acentry"), acentry.strAccount, ++nAccountingEntryNumber), acentry);
695 int64 CWalletDB::GetAccountCreditDebit(const string& strAccount)
697 list<CAccountingEntry> entries;
698 ListAccountCreditDebit(strAccount, entries);
700 int64 nCreditDebit = 0;
701 BOOST_FOREACH (const CAccountingEntry& entry, entries)
702 nCreditDebit += entry.nCreditDebit;
707 void CWalletDB::ListAccountCreditDebit(const string& strAccount, list<CAccountingEntry>& entries)
709 bool fAllAccounts = (strAccount == "*");
711 Dbc* pcursor = GetCursor();
713 throw runtime_error("CWalletDB::ListAccountCreditDebit() : cannot create DB cursor");
714 unsigned int fFlags = DB_SET_RANGE;
719 if (fFlags == DB_SET_RANGE)
720 ssKey << boost::make_tuple(string("acentry"), (fAllAccounts? string("") : strAccount), uint64(0));
722 int ret = ReadAtCursor(pcursor, ssKey, ssValue, fFlags);
724 if (ret == DB_NOTFOUND)
729 throw runtime_error("CWalletDB::ListAccountCreditDebit() : error scanning DB");
735 if (strType != "acentry")
737 CAccountingEntry acentry;
738 ssKey >> acentry.strAccount;
739 if (!fAllAccounts && acentry.strAccount != strAccount)
743 entries.push_back(acentry);
750 int CWalletDB::LoadWallet(CWallet* pwallet)
752 pwallet->vchDefaultKey.clear();
753 int nFileVersion = 0;
754 vector<uint256> vWalletUpgrade;
755 bool fIsEncrypted = false;
759 // Tray icon sometimes disappears on 9.10 karmic koala 64-bit, leaving no way to access the program
760 fMinimizeToTray = false;
761 fMinimizeOnClose = false;
764 //// todo: shouldn't we catch exceptions and try to recover and continue?
765 CRITICAL_BLOCK(pwallet->cs_wallet)
768 Dbc* pcursor = GetCursor();
777 int ret = ReadAtCursor(pcursor, ssKey, ssValue);
778 if (ret == DB_NOTFOUND)
784 // Taking advantage of the fact that pair serialization
785 // is just the two items serialized one after the other
788 if (strType == "name")
792 ssValue >> pwallet->mapAddressBook[strAddress];
794 else if (strType == "tx")
798 CWalletTx& wtx = pwallet->mapWallet[hash];
800 wtx.pwallet = pwallet;
802 if (wtx.GetHash() != hash)
803 printf("Error in wallet.dat, hash mismatch\n");
805 // Undo serialize changes in 31600
806 if (31404 <= wtx.fTimeReceivedIsTxTime && wtx.fTimeReceivedIsTxTime <= 31703)
808 if (!ssValue.empty())
812 ssValue >> fTmp >> fUnused >> wtx.strFromAccount;
813 printf("LoadWallet() upgrading tx ver=%d %d '%s' %s\n", wtx.fTimeReceivedIsTxTime, fTmp, wtx.strFromAccount.c_str(), hash.ToString().c_str());
814 wtx.fTimeReceivedIsTxTime = fTmp;
818 printf("LoadWallet() repairing tx ver=%d %s\n", wtx.fTimeReceivedIsTxTime, hash.ToString().c_str());
819 wtx.fTimeReceivedIsTxTime = 0;
821 vWalletUpgrade.push_back(hash);
825 //printf("LoadWallet %s\n", wtx.GetHash().ToString().c_str());
826 //printf(" %12I64d %s %s %s\n",
827 // wtx.vout[0].nValue,
828 // DateTimeStrFormat("%x %H:%M:%S", wtx.GetBlockTime()).c_str(),
829 // wtx.hashBlock.ToString().substr(0,20).c_str(),
830 // wtx.mapValue["message"].c_str());
832 else if (strType == "acentry")
838 if (nNumber > nAccountingEntryNumber)
839 nAccountingEntryNumber = nNumber;
841 else if (strType == "key" || strType == "wkey")
843 vector<unsigned char> vchPubKey;
846 if (strType == "key")
850 key.SetPrivKey(pkey);
856 key.SetPrivKey(wkey.vchPrivKey);
858 if (!pwallet->LoadKey(key))
861 else if (strType == "mkey")
865 CMasterKey kMasterKey;
866 ssValue >> kMasterKey;
867 if(pwallet->mapMasterKeys.count(nID) != 0)
869 pwallet->mapMasterKeys[nID] = kMasterKey;
870 if (pwallet->nMasterKeyMaxID < nID)
871 pwallet->nMasterKeyMaxID = nID;
873 else if (strType == "ckey")
875 vector<unsigned char> vchPubKey;
877 vector<unsigned char> vchPrivKey;
878 ssValue >> vchPrivKey;
879 if (!pwallet->LoadCryptedKey(vchPubKey, vchPrivKey))
883 else if (strType == "defaultkey")
885 ssValue >> pwallet->vchDefaultKey;
887 else if (strType == "pool")
891 pwallet->setKeyPool.insert(nIndex);
893 else if (strType == "version")
895 ssValue >> nFileVersion;
896 if (nFileVersion == 10300)
899 else if (strType == "setting")
906 if (strKey == "fGenerateBitcoins") ssValue >> fGenerateBitcoins;
908 if (strKey == "nTransactionFee") ssValue >> nTransactionFee;
909 if (strKey == "fLimitProcessors") ssValue >> fLimitProcessors;
910 if (strKey == "nLimitProcessors") ssValue >> nLimitProcessors;
911 if (strKey == "fMinimizeToTray") ssValue >> fMinimizeToTray;
912 if (strKey == "fMinimizeOnClose") ssValue >> fMinimizeOnClose;
913 if (strKey == "fUseProxy") ssValue >> fUseProxy;
914 if (strKey == "addrProxy") ssValue >> addrProxy;
915 if (fHaveUPnP && strKey == "fUseUPnP") ssValue >> fUseUPnP;
917 else if (strType == "minversion")
920 ssValue >> nMinVersion;
921 if (nMinVersion > VERSION)
928 BOOST_FOREACH(uint256 hash, vWalletUpgrade)
929 WriteTx(hash, pwallet->mapWallet[hash]);
931 printf("nFileVersion = %d\n", nFileVersion);
932 printf("fGenerateBitcoins = %d\n", fGenerateBitcoins);
933 printf("nTransactionFee = %"PRI64d"\n", nTransactionFee);
934 printf("fMinimizeToTray = %d\n", fMinimizeToTray);
935 printf("fMinimizeOnClose = %d\n", fMinimizeOnClose);
936 printf("fUseProxy = %d\n", fUseProxy);
937 printf("addrProxy = %s\n", addrProxy.ToString().c_str());
939 printf("fUseUPnP = %d\n", fUseUPnP);
942 // Rewrite encrypted wallets of versions 0.4.0 and 0.5.0rc:
943 if (fIsEncrypted && (nFileVersion == 40000 || nFileVersion == 50000))
944 return DB_NEED_REWRITE;
946 if (nFileVersion < VERSION) // Update
948 // Get rid of old debug.log file in current directory
949 if (nFileVersion <= 105 && !pszSetDataDir[0])
952 WriteVersion(VERSION);
958 void ThreadFlushWalletDB(void* parg)
960 const string& strFile = ((const string*)parg)[0];
961 static bool fOneThread;
965 if (mapArgs.count("-noflushwallet"))
968 unsigned int nLastSeen = nWalletDBUpdated;
969 unsigned int nLastFlushed = nWalletDBUpdated;
970 int64 nLastWalletUpdate = GetTime();
975 if (nLastSeen != nWalletDBUpdated)
977 nLastSeen = nWalletDBUpdated;
978 nLastWalletUpdate = GetTime();
981 if (nLastFlushed != nWalletDBUpdated && GetTime() - nLastWalletUpdate >= 2)
983 TRY_CRITICAL_BLOCK(cs_db)
985 // Don't do this if any databases are in use
987 map<string, int>::iterator mi = mapFileUseCount.begin();
988 while (mi != mapFileUseCount.end())
990 nRefCount += (*mi).second;
994 if (nRefCount == 0 && !fShutdown)
996 map<string, int>::iterator mi = mapFileUseCount.find(strFile);
997 if (mi != mapFileUseCount.end())
999 printf("%s ", DateTimeStrFormat("%x %H:%M:%S", GetTime()).c_str());
1000 printf("Flushing wallet.dat\n");
1001 nLastFlushed = nWalletDBUpdated;
1002 int64 nStart = GetTimeMillis();
1004 // Flush wallet.dat so it's self contained
1006 dbenv.txn_checkpoint(0, 0, 0);
1007 dbenv.lsn_reset(strFile.c_str(), 0);
1009 mapFileUseCount.erase(mi++);
1010 printf("Flushed wallet.dat %"PRI64d"ms\n", GetTimeMillis() - nStart);
1018 bool BackupWallet(const CWallet& wallet, const string& strDest)
1020 if (!wallet.fFileBacked)
1024 CRITICAL_BLOCK(cs_db)
1026 if (!mapFileUseCount.count(wallet.strWalletFile) || mapFileUseCount[wallet.strWalletFile] == 0)
1028 // Flush log data to the dat file
1029 CloseDb(wallet.strWalletFile);
1030 dbenv.txn_checkpoint(0, 0, 0);
1031 dbenv.lsn_reset(wallet.strWalletFile.c_str(), 0);
1032 mapFileUseCount.erase(wallet.strWalletFile);
1035 filesystem::path pathSrc(GetDataDir() + "/" + wallet.strWalletFile);
1036 filesystem::path pathDest(strDest);
1037 if (filesystem::is_directory(pathDest))
1038 pathDest = pathDest / wallet.strWalletFile;
1039 #if BOOST_VERSION >= 104000
1040 filesystem::copy_file(pathSrc, pathDest, filesystem::copy_option::overwrite_if_exists);
1042 filesystem::copy_file(pathSrc, pathDest);
1044 printf("copied wallet.dat to %s\n", pathDest.string().c_str());