src/db.cpp

   1 // Copyright (c) 2009-2010 Satoshi Nakamoto
   2 // Copyright (c) 2009-2012 The Bitcoin developers
   3 // Distributed under the MIT/X11 software license, see the accompanying
   4 // file license.txt or http://www.opensource.org/licenses/mit-license.php.
   5
   6 #include "headers.h"
   7 #include "db.h"
   8 #include "net.h"
   9 #include <boost/version.hpp>
  10 #include <boost/filesystem.hpp>
  11 #include <boost/filesystem/fstream.hpp>
  12
  13 using namespace std;
  14 using namespace boost;
  15
  16
  17 unsigned int nWalletDBUpdated;
  18 uint64 nAccountingEntryNumber = 0;
  19
  20
  21
  22 //
  23 // CDB
  24 //
  25
  26 static CCriticalSection cs_db;
  27 static bool fDbEnvInit = false;
  28 DbEnv dbenv(0);
  29 static map<string, int> mapFileUseCount;
  30 static map<string, Db*> mapDb;
  31
  32 static void EnvShutdown()
  33 {
  34     if (!fDbEnvInit)
  35         return;
  36
  37     fDbEnvInit = false;
  38     try
  39     {
  40         dbenv.close(0);
  41     }
  42     catch (const DbException& e)
  43     {
  44         printf("EnvShutdown exception: %s (%d)\n", e.what(), e.get_errno());
  45     }
  46     DbEnv(0).remove(GetDataDir().c_str(), 0);
  47 }
  48
  49 class CDBInit
  50 {
  51 public:
  52     CDBInit()
  53     {
  54     }
  55     ~CDBInit()
  56     {
  57         EnvShutdown();
  58     }
  59 }
  60 instance_of_cdbinit;
  61
  62
  63 CDB::CDB(const char* pszFile, const char* pszMode) : pdb(NULL)
  64 {
  65     int ret;
  66     if (pszFile == NULL)
  67         return;
  68
  69     fReadOnly = (!strchr(pszMode, '+') && !strchr(pszMode, 'w'));
  70     bool fCreate = strchr(pszMode, 'c');
  71     unsigned int nFlags = DB_THREAD;
  72     if (fCreate)
  73         nFlags |= DB_CREATE;
  74
  75     CRITICAL_BLOCK(cs_db)
  76     {
  77         if (!fDbEnvInit)
  78         {
  79             if (fShutdown)
  80                 return;
  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());
  86
  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(),
  94                              DB_CREATE     |
  95                              DB_INIT_LOCK  |
  96                              DB_INIT_LOG   |
  97                              DB_INIT_MPOOL |
  98                              DB_INIT_TXN   |
  99                              DB_THREAD     |
 100                              DB_RECOVER,
 101                              S_IRUSR | S_IWUSR);
 102             if (ret > 0)
 103                 throw runtime_error(strprintf("CDB() : error %d opening database environment", ret));
 104             fDbEnvInit = true;
 105         }
 106
 107         strFile = pszFile;
 108         ++mapFileUseCount[strFile];
 109         pdb = mapDb[strFile];
 110         if (pdb == NULL)
 111         {
 112             pdb = new Db(&dbenv, 0);
 113
 114             ret = pdb->open(NULL,      // Txn pointer
 115                             pszFile,   // Filename
 116                             "main",    // Logical db name
 117                             DB_BTREE,  // Database type
 118                             nFlags,    // Flags
 119                             0);
 120
 121             if (ret > 0)
 122             {
 123                 delete pdb;
 124                 pdb = NULL;
 125                 CRITICAL_BLOCK(cs_db)
 126                     --mapFileUseCount[strFile];
 127                 strFile = "";
 128                 throw runtime_error(strprintf("CDB() : can't open database file %s, error %d", pszFile, ret));
 129             }
 130
 131             if (fCreate && !Exists(string("version")))
 132             {
 133                 bool fTmp = fReadOnly;
 134                 fReadOnly = false;
 135                 WriteVersion(CLIENT_VERSION);
 136                 fReadOnly = fTmp;
 137             }
 138
 139             mapDb[strFile] = pdb;
 140         }
 141     }
 142 }
 143
 144 void CDB::Close()
 145 {
 146     if (!pdb)
 147         return;
 148     if (!vTxn.empty())
 149         vTxn.front()->abort();
 150     vTxn.clear();
 151     pdb = NULL;
 152
 153     // Flush database activity from memory pool to disk log
 154     unsigned int nMinutes = 0;
 155     if (fReadOnly)
 156         nMinutes = 1;
 157     if (strFile == "addr.dat")
 158         nMinutes = 2;
 159     if (strFile == "blkindex.dat" && IsInitialBlockDownload() && nBestHeight % 500 != 0)
 160         nMinutes = 1;
 161     dbenv.txn_checkpoint(0, nMinutes, 0);
 162
 163     CRITICAL_BLOCK(cs_db)
 164         --mapFileUseCount[strFile];
 165 }
 166
 167 void static CloseDb(const string& strFile)
 168 {
 169     CRITICAL_BLOCK(cs_db)
 170     {
 171         if (mapDb[strFile] != NULL)
 172         {
 173             // Close the database handle
 174             Db* pdb = mapDb[strFile];
 175             pdb->close(0);
 176             delete pdb;
 177             mapDb[strFile] = NULL;
 178         }
 179     }
 180 }
 181
 182 bool CDB::Rewrite(const string& strFile, const char* pszSkip)
 183 {
 184     while (!fShutdown)
 185     {
 186         CRITICAL_BLOCK(cs_db)
 187         {
 188             if (!mapFileUseCount.count(strFile) || mapFileUseCount[strFile] == 0)
 189             {
 190                 // Flush log data to the dat file
 191                 CloseDb(strFile);
 192                 dbenv.txn_checkpoint(0, 0, 0);
 193                 dbenv.lsn_reset(strFile.c_str(), 0);
 194                 mapFileUseCount.erase(strFile);
 195
 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);
 202
 203                     int ret = pdbCopy->open(NULL,                 // Txn pointer
 204                                             strFileRes.c_str(),   // Filename
 205                                             "main",    // Logical db name
 206                                             DB_BTREE,  // Database type
 207                                             DB_CREATE,    // Flags
 208                                             0);
 209                     if (ret > 0)
 210                     {
 211                         printf("Cannot create database file %s\n", strFileRes.c_str());
 212                         fSuccess = false;
 213                     }
 214
 215                     Dbc* pcursor = db.GetCursor();
 216                     if (pcursor)
 217                         while (fSuccess)
 218                         {
 219                             CDataStream ssKey;
 220                             CDataStream ssValue;
 221                             int ret = db.ReadAtCursor(pcursor, ssKey, ssValue, DB_NEXT);
 222                             if (ret == DB_NOTFOUND)
 223                             {
 224                                 pcursor->close();
 225                                 break;
 226                             }
 227                             else if (ret != 0)
 228                             {
 229                                 pcursor->close();
 230                                 fSuccess = false;
 231                                 break;
 232                             }
 233                             if (pszSkip &&
 234                                 strncmp(&ssKey[0], pszSkip, std::min(ssKey.size(), strlen(pszSkip))) == 0)
 235                                 continue;
 236                             if (strncmp(&ssKey[0], "\x07version", 8) == 0)
 237                             {
 238                                 // Update version:
 239                                 ssValue.clear();
 240                                 ssValue << CLIENT_VERSION;
 241                             }
 242                             Dbt datKey(&ssKey[0], ssKey.size());
 243                             Dbt datValue(&ssValue[0], ssValue.size());
 244                             int ret2 = pdbCopy->put(NULL, &datKey, &datValue, DB_NOOVERWRITE);
 245                             if (ret2 > 0)
 246                                 fSuccess = false;
 247                         }
 248                     if (fSuccess)
 249                     {
 250                         db.Close();
 251                         CloseDb(strFile);
 252                         if (pdbCopy->close(0))
 253                             fSuccess = false;
 254                         delete pdbCopy;
 255                     }
 256                 }
 257                 if (fSuccess)
 258                 {
 259                     Db dbA(&dbenv, 0);
 260                     if (dbA.remove(strFile.c_str(), NULL, 0))
 261                         fSuccess = false;
 262                     Db dbB(&dbenv, 0);
 263                     if (dbB.rename(strFileRes.c_str(), NULL, strFile.c_str(), 0))
 264                         fSuccess = false;
 265                 }
 266                 if (!fSuccess)
 267                     printf("Rewriting of %s FAILED!\n", strFileRes.c_str());
 268                 return fSuccess;
 269             }
 270         }
 271         Sleep(100);
 272     }
 273     return false;
 274 }
 275
 276
 277 void DBFlush(bool fShutdown)
 278 {
 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");
 282     if (!fDbEnvInit)
 283         return;
 284     CRITICAL_BLOCK(cs_db)
 285     {
 286         map<string, int>::iterator mi = mapFileUseCount.begin();
 287         while (mi != mapFileUseCount.end())
 288         {
 289             string strFile = (*mi).first;
 290             int nRefCount = (*mi).second;
 291             printf("%s refcount=%d\n", strFile.c_str(), nRefCount);
 292             if (nRefCount == 0)
 293             {
 294                 // Move log data to the dat file
 295                 CloseDb(strFile);
 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++);
 300             }
 301             else
 302                 mi++;
 303         }
 304         if (fShutdown)
 305         {
 306             char** listp;
 307             if (mapFileUseCount.empty())
 308             {
 309                 dbenv.log_archive(&listp, DB_ARCH_REMOVE);
 310                 EnvShutdown();
 311             }
 312         }
 313     }
 314 }
 315
 316
 317
 318
 319
 320
 321 //
 322 // CTxDB
 323 //
 324
 325 bool CTxDB::ReadTxIndex(uint256 hash, CTxIndex& txindex)
 326 {
 327     assert(!fClient);
 328     txindex.SetNull();
 329     return Read(make_pair(string("tx"), hash), txindex);
 330 }
 331
 332 bool CTxDB::UpdateTxIndex(uint256 hash, const CTxIndex& txindex)
 333 {
 334     assert(!fClient);
 335     return Write(make_pair(string("tx"), hash), txindex);
 336 }
 337
 338 bool CTxDB::AddTxIndex(const CTransaction& tx, const CDiskTxPos& pos, int nHeight)
 339 {
 340     assert(!fClient);
 341
 342     // Add to tx index
 343     uint256 hash = tx.GetHash();
 344     CTxIndex txindex(pos, tx.vout.size());
 345     return Write(make_pair(string("tx"), hash), txindex);
 346 }
 347
 348 bool CTxDB::EraseTxIndex(const CTransaction& tx)
 349 {
 350     assert(!fClient);
 351     uint256 hash = tx.GetHash();
 352
 353     return Erase(make_pair(string("tx"), hash));
 354 }
 355
 356 bool CTxDB::ContainsTx(uint256 hash)
 357 {
 358     assert(!fClient);
 359     return Exists(make_pair(string("tx"), hash));
 360 }
 361
 362 bool CTxDB::ReadOwnerTxes(uint160 hash160, int nMinHeight, vector<CTransaction>& vtx)
 363 {
 364     assert(!fClient);
 365     vtx.clear();
 366
 367     // Get cursor
 368     Dbc* pcursor = GetCursor();
 369     if (!pcursor)
 370         return false;
 371
 372     unsigned int fFlags = DB_SET_RANGE;
 373     loop
 374     {
 375         // Read next record
 376         CDataStream ssKey;
 377         if (fFlags == DB_SET_RANGE)
 378             ssKey << string("owner") << hash160 << CDiskTxPos(0, 0, 0);
 379         CDataStream ssValue;
 380         int ret = ReadAtCursor(pcursor, ssKey, ssValue, fFlags);
 381         fFlags = DB_NEXT;
 382         if (ret == DB_NOTFOUND)
 383             break;
 384         else if (ret != 0)
 385         {
 386             pcursor->close();
 387             return false;
 388         }
 389
 390         // Unserialize
 391         string strType;
 392         uint160 hashItem;
 393         CDiskTxPos pos;
 394         ssKey >> strType >> hashItem >> pos;
 395         int nItemHeight;
 396         ssValue >> nItemHeight;
 397
 398         // Read transaction
 399         if (strType != "owner" || hashItem != hash160)
 400             break;
 401         if (nItemHeight >= nMinHeight)
 402         {
 403             vtx.resize(vtx.size()+1);
 404             if (!vtx.back().ReadFromDisk(pos))
 405             {
 406                 pcursor->close();
 407                 return false;
 408             }
 409         }
 410     }
 411
 412     pcursor->close();
 413     return true;
 414 }
 415
 416 bool CTxDB::ReadDiskTx(uint256 hash, CTransaction& tx, CTxIndex& txindex)
 417 {
 418     assert(!fClient);
 419     tx.SetNull();
 420     if (!ReadTxIndex(hash, txindex))
 421         return false;
 422     return (tx.ReadFromDisk(txindex.pos));
 423 }
 424
 425 bool CTxDB::ReadDiskTx(uint256 hash, CTransaction& tx)
 426 {
 427     CTxIndex txindex;
 428     return ReadDiskTx(hash, tx, txindex);
 429 }
 430
 431 bool CTxDB::ReadDiskTx(COutPoint outpoint, CTransaction& tx, CTxIndex& txindex)
 432 {
 433     return ReadDiskTx(outpoint.hash, tx, txindex);
 434 }
 435
 436 bool CTxDB::ReadDiskTx(COutPoint outpoint, CTransaction& tx)
 437 {
 438     CTxIndex txindex;
 439     return ReadDiskTx(outpoint.hash, tx, txindex);
 440 }
 441
 442 bool CTxDB::WriteBlockIndex(const CDiskBlockIndex& blockindex)
 443 {
 444     return Write(make_pair(string("blockindex"), blockindex.GetBlockHash()), blockindex);
 445 }
 446
 447 bool CTxDB::EraseBlockIndex(uint256 hash)
 448 {
 449     return Erase(make_pair(string("blockindex"), hash));
 450 }
 451
 452 bool CTxDB::ReadHashBestChain(uint256& hashBestChain)
 453 {
 454     return Read(string("hashBestChain"), hashBestChain);
 455 }
 456
 457 bool CTxDB::WriteHashBestChain(uint256 hashBestChain)
 458 {
 459     return Write(string("hashBestChain"), hashBestChain);
 460 }
 461
 462 bool CTxDB::ReadBestInvalidWork(CBigNum& bnBestInvalidWork)
 463 {
 464     return Read(string("bnBestInvalidWork"), bnBestInvalidWork);
 465 }
 466
 467 bool CTxDB::WriteBestInvalidWork(CBigNum bnBestInvalidWork)
 468 {
 469     return Write(string("bnBestInvalidWork"), bnBestInvalidWork);
 470 }
 471
 472 CBlockIndex static * InsertBlockIndex(uint256 hash)
 473 {
 474     if (hash == 0)
 475         return NULL;
 476
 477     // Return existing
 478     map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.find(hash);
 479     if (mi != mapBlockIndex.end())
 480         return (*mi).second;
 481
 482     // Create new
 483     CBlockIndex* pindexNew = new CBlockIndex();
 484     if (!pindexNew)
 485         throw runtime_error("LoadBlockIndex() : new CBlockIndex failed");
 486     mi = mapBlockIndex.insert(make_pair(hash, pindexNew)).first;
 487     pindexNew->phashBlock = &((*mi).first);
 488
 489     return pindexNew;
 490 }
 491
 492 bool CTxDB::LoadBlockIndex()
 493 {
 494     // Get database cursor
 495     Dbc* pcursor = GetCursor();
 496     if (!pcursor)
 497         return false;
 498
 499     // Load mapBlockIndex
 500     unsigned int fFlags = DB_SET_RANGE;
 501     loop
 502     {
 503         // Read next record
 504         CDataStream ssKey;
 505         if (fFlags == DB_SET_RANGE)
 506             ssKey << make_pair(string("blockindex"), uint256(0));
 507         CDataStream ssValue;
 508         int ret = ReadAtCursor(pcursor, ssKey, ssValue, fFlags);
 509         fFlags = DB_NEXT;
 510         if (ret == DB_NOTFOUND)
 511             break;
 512         else if (ret != 0)
 513             return false;
 514
 515         // Unserialize
 516         string strType;
 517         ssKey >> strType;
 518         if (strType == "blockindex")
 519         {
 520             CDiskBlockIndex diskindex;
 521             ssValue >> diskindex;
 522
 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->nHeight        = diskindex.nHeight;
 530             pindexNew->nVersion       = diskindex.nVersion;
 531             pindexNew->hashMerkleRoot = diskindex.hashMerkleRoot;
 532             pindexNew->nTime          = diskindex.nTime;
 533             pindexNew->nBits          = diskindex.nBits;
 534             pindexNew->nNonce         = diskindex.nNonce;
 535
 536             // Watch for genesis block
 537             if (pindexGenesisBlock == NULL && diskindex.GetBlockHash() == hashGenesisBlock)
 538                 pindexGenesisBlock = pindexNew;
 539
 540             if (!pindexNew->CheckIndex())
 541                 return error("LoadBlockIndex() : CheckIndex failed at %d", pindexNew->nHeight);
 542         }
 543         else
 544         {
 545             break;
 546         }
 547     }
 548     pcursor->close();
 549
 550     // Calculate bnChainWork
 551     vector<pair<int, CBlockIndex*> > vSortedByHeight;
 552     vSortedByHeight.reserve(mapBlockIndex.size());
 553     BOOST_FOREACH(const PAIRTYPE(uint256, CBlockIndex*)& item, mapBlockIndex)
 554     {
 555         CBlockIndex* pindex = item.second;
 556         vSortedByHeight.push_back(make_pair(pindex->nHeight, pindex));
 557     }
 558     sort(vSortedByHeight.begin(), vSortedByHeight.end());
 559     BOOST_FOREACH(const PAIRTYPE(int, CBlockIndex*)& item, vSortedByHeight)
 560     {
 561         CBlockIndex* pindex = item.second;
 562         pindex->bnChainWork = (pindex->pprev ? pindex->pprev->bnChainWork : 0) + pindex->GetBlockWork();
 563     }
 564
 565     // Load hashBestChain pointer to end of best chain
 566     if (!ReadHashBestChain(hashBestChain))
 567     {
 568         if (pindexGenesisBlock == NULL)
 569             return true;
 570         return error("CTxDB::LoadBlockIndex() : hashBestChain not loaded");
 571     }
 572     if (!mapBlockIndex.count(hashBestChain))
 573         return error("CTxDB::LoadBlockIndex() : hashBestChain not found in the block index");
 574     pindexBest = mapBlockIndex[hashBestChain];
 575     nBestHeight = pindexBest->nHeight;
 576     bnBestChainWork = pindexBest->bnChainWork;
 577     printf("LoadBlockIndex(): hashBestChain=%s  height=%d\n", hashBestChain.ToString().substr(0,20).c_str(), nBestHeight);
 578
 579     // Load bnBestInvalidWork, OK if it doesn't exist
 580     ReadBestInvalidWork(bnBestInvalidWork);
 581
 582     // Verify blocks in the best chain
 583     CBlockIndex* pindexFork = NULL;
 584     for (CBlockIndex* pindex = pindexBest; pindex && pindex->pprev; pindex = pindex->pprev)
 585     {
 586         if (pindex->nHeight < nBestHeight-2500 && !mapArgs.count("-checkblocks"))
 587             break;
 588         CBlock block;
 589         if (!block.ReadFromDisk(pindex))
 590             return error("LoadBlockIndex() : block.ReadFromDisk failed");
 591         if (!block.CheckBlock())
 592         {
 593             printf("LoadBlockIndex() : *** found bad block at %d, hash=%s\n", pindex->nHeight, pindex->GetBlockHash().ToString().c_str());
 594             pindexFork = pindex->pprev;
 595         }
 596     }
 597     if (pindexFork)
 598     {
 599         // Reorg back to the fork
 600         printf("LoadBlockIndex() : *** moving best chain pointer back to block %d\n", pindexFork->nHeight);
 601         CBlock block;
 602         if (!block.ReadFromDisk(pindexFork))
 603             return error("LoadBlockIndex() : block.ReadFromDisk failed");
 604         CTxDB txdb;
 605         block.SetBestChain(txdb, pindexFork);
 606     }
 607
 608     return true;
 609 }
 610
 611
 612
 613
 614
 615 //
 616 // CAddrDB
 617 //
 618
 619 bool CAddrDB::WriteAddress(const CAddress& addr)
 620 {
 621     return Write(make_pair(string("addr"), addr.GetKey()), addr);
 622 }
 623
 624 bool CAddrDB::EraseAddress(const CAddress& addr)
 625 {
 626     return Erase(make_pair(string("addr"), addr.GetKey()));
 627 }
 628
 629 bool CAddrDB::LoadAddresses()
 630 {
 631     CRITICAL_BLOCK(cs_mapAddresses)
 632     {
 633         // Get cursor
 634         Dbc* pcursor = GetCursor();
 635         if (!pcursor)
 636             return false;
 637
 638         loop
 639         {
 640             // Read next record
 641             CDataStream ssKey;
 642             CDataStream ssValue;
 643             int ret = ReadAtCursor(pcursor, ssKey, ssValue);
 644             if (ret == DB_NOTFOUND)
 645                 break;
 646             else if (ret != 0)
 647                 return false;
 648
 649             // Unserialize
 650             string strType;
 651             ssKey >> strType;
 652             if (strType == "addr")
 653             {
 654                 CAddress addr;
 655                 ssValue >> addr;
 656                 mapAddresses.insert(make_pair(addr.GetKey(), addr));
 657             }
 658         }
 659         pcursor->close();
 660
 661         printf("Loaded %d addresses\n", mapAddresses.size());
 662     }
 663
 664     return true;
 665 }
 666
 667 bool LoadAddresses()
 668 {
 669     return CAddrDB("cr+").LoadAddresses();
 670 }
 671
 672
 673
 674
 675 //
 676 // CWalletDB
 677 //
 678
 679 bool CWalletDB::WriteName(const string& strAddress, const string& strName)
 680 {
 681     nWalletDBUpdated++;
 682     return Write(make_pair(string("name"), strAddress), strName);
 683 }
 684
 685 bool CWalletDB::EraseName(const string& strAddress)
 686 {
 687     // This should only be used for sending addresses, never for receiving addresses,
 688     // receiving addresses must always have an address book entry if they're not change return.
 689     nWalletDBUpdated++;
 690     return Erase(make_pair(string("name"), strAddress));
 691 }
 692
 693 bool CWalletDB::ReadAccount(const string& strAccount, CAccount& account)
 694 {
 695     account.SetNull();
 696     return Read(make_pair(string("acc"), strAccount), account);
 697 }
 698
 699 bool CWalletDB::WriteAccount(const string& strAccount, const CAccount& account)
 700 {
 701     return Write(make_pair(string("acc"), strAccount), account);
 702 }
 703
 704 bool CWalletDB::WriteAccountingEntry(const CAccountingEntry& acentry)
 705 {
 706     return Write(boost::make_tuple(string("acentry"), acentry.strAccount, ++nAccountingEntryNumber), acentry);
 707 }
 708
 709 int64 CWalletDB::GetAccountCreditDebit(const string& strAccount)
 710 {
 711     list<CAccountingEntry> entries;
 712     ListAccountCreditDebit(strAccount, entries);
 713
 714     int64 nCreditDebit = 0;
 715     BOOST_FOREACH (const CAccountingEntry& entry, entries)
 716         nCreditDebit += entry.nCreditDebit;
 717
 718     return nCreditDebit;
 719 }
 720
 721 void CWalletDB::ListAccountCreditDebit(const string& strAccount, list<CAccountingEntry>& entries)
 722 {
 723     bool fAllAccounts = (strAccount == "*");
 724
 725     Dbc* pcursor = GetCursor();
 726     if (!pcursor)
 727         throw runtime_error("CWalletDB::ListAccountCreditDebit() : cannot create DB cursor");
 728     unsigned int fFlags = DB_SET_RANGE;
 729     loop
 730     {
 731         // Read next record
 732         CDataStream ssKey;
 733         if (fFlags == DB_SET_RANGE)
 734             ssKey << boost::make_tuple(string("acentry"), (fAllAccounts? string("") : strAccount), uint64(0));
 735         CDataStream ssValue;
 736         int ret = ReadAtCursor(pcursor, ssKey, ssValue, fFlags);
 737         fFlags = DB_NEXT;
 738         if (ret == DB_NOTFOUND)
 739             break;
 740         else if (ret != 0)
 741         {
 742             pcursor->close();
 743             throw runtime_error("CWalletDB::ListAccountCreditDebit() : error scanning DB");
 744         }
 745
 746         // Unserialize
 747         string strType;
 748         ssKey >> strType;
 749         if (strType != "acentry")
 750             break;
 751         CAccountingEntry acentry;
 752         ssKey >> acentry.strAccount;
 753         if (!fAllAccounts && acentry.strAccount != strAccount)
 754             break;
 755
 756         ssValue >> acentry;
 757         entries.push_back(acentry);
 758     }
 759
 760     pcursor->close();
 761 }
 762
 763
 764 int CWalletDB::LoadWallet(CWallet* pwallet)
 765 {
 766     pwallet->vchDefaultKey.clear();
 767     int nFileVersion = 0;
 768     vector<uint256> vWalletUpgrade;
 769     bool fIsEncrypted = false;
 770
 771     // Modify defaults
 772 #ifndef WIN32
 773     // Tray icon sometimes disappears on 9.10 karmic koala 64-bit, leaving no way to access the program
 774     fMinimizeToTray = false;
 775     fMinimizeOnClose = false;
 776 #endif
 777
 778     //// todo: shouldn't we catch exceptions and try to recover and continue?
 779     CRITICAL_BLOCK(pwallet->cs_wallet)
 780     {
 781         // Get cursor
 782         Dbc* pcursor = GetCursor();
 783         if (!pcursor)
 784             return DB_CORRUPT;
 785
 786         loop
 787         {
 788             // Read next record
 789             CDataStream ssKey;
 790             CDataStream ssValue;
 791             int ret = ReadAtCursor(pcursor, ssKey, ssValue);
 792             if (ret == DB_NOTFOUND)
 793                 break;
 794             else if (ret != 0)
 795                 return DB_CORRUPT;
 796
 797             // Unserialize
 798             // Taking advantage of the fact that pair serialization
 799             // is just the two items serialized one after the other
 800             string strType;
 801             ssKey >> strType;
 802             if (strType == "name")
 803             {
 804                 string strAddress;
 805                 ssKey >> strAddress;
 806                 ssValue >> pwallet->mapAddressBook[strAddress];
 807             }
 808             else if (strType == "tx")
 809             {
 810                 uint256 hash;
 811                 ssKey >> hash;
 812                 CWalletTx& wtx = pwallet->mapWallet[hash];
 813                 ssValue >> wtx;
 814                 wtx.BindWallet(pwallet);
 815
 816                 if (wtx.GetHash() != hash)
 817                     printf("Error in wallet.dat, hash mismatch\n");
 818
 819                 // Undo serialize changes in 31600
 820                 if (31404 <= wtx.fTimeReceivedIsTxTime && wtx.fTimeReceivedIsTxTime <= 31703)
 821                 {
 822                     if (!ssValue.empty())
 823                     {
 824                         char fTmp;
 825                         char fUnused;
 826                         ssValue >> fTmp >> fUnused >> wtx.strFromAccount;
 827                         printf("LoadWallet() upgrading tx ver=%d %d '%s' %s\n", wtx.fTimeReceivedIsTxTime, fTmp, wtx.strFromAccount.c_str(), hash.ToString().c_str());
 828                         wtx.fTimeReceivedIsTxTime = fTmp;
 829                     }
 830                     else
 831                     {
 832                         printf("LoadWallet() repairing tx ver=%d %s\n", wtx.fTimeReceivedIsTxTime, hash.ToString().c_str());
 833                         wtx.fTimeReceivedIsTxTime = 0;
 834                     }
 835                     vWalletUpgrade.push_back(hash);
 836                 }
 837
 838                 //// debug print
 839                 //printf("LoadWallet  %s\n", wtx.GetHash().ToString().c_str());
 840                 //printf(" %12I64d  %s  %s  %s\n",
 841                 //    wtx.vout[0].nValue,
 842                 //    DateTimeStrFormat("%x %H:%M:%S", wtx.GetBlockTime()).c_str(),
 843                 //    wtx.hashBlock.ToString().substr(0,20).c_str(),
 844                 //    wtx.mapValue["message"].c_str());
 845             }
 846             else if (strType == "acentry")
 847             {
 848                 string strAccount;
 849                 ssKey >> strAccount;
 850                 uint64 nNumber;
 851                 ssKey >> nNumber;
 852                 if (nNumber > nAccountingEntryNumber)
 853                     nAccountingEntryNumber = nNumber;
 854             }
 855             else if (strType == "key" || strType == "wkey")
 856             {
 857                 vector<unsigned char> vchPubKey;
 858                 ssKey >> vchPubKey;
 859                 CKey key;
 860                 if (strType == "key")
 861                 {
 862                     CPrivKey pkey;
 863                     ssValue >> pkey;
 864                     key.SetPubKey(vchPubKey);
 865                     key.SetPrivKey(pkey);
 866                     if (key.GetPubKey() != vchPubKey || !key.IsValid())
 867                         return DB_CORRUPT;
 868                 }
 869                 else
 870                 {
 871                     CWalletKey wkey;
 872                     ssValue >> wkey;
 873                     key.SetPubKey(vchPubKey);
 874                     key.SetPrivKey(wkey.vchPrivKey);
 875                     if (key.GetPubKey() != vchPubKey || !key.IsValid())
 876                         return DB_CORRUPT;
 877                 }
 878                 if (!pwallet->LoadKey(key))
 879                     return DB_CORRUPT;
 880             }
 881             else if (strType == "mkey")
 882             {
 883                 unsigned int nID;
 884                 ssKey >> nID;
 885                 CMasterKey kMasterKey;
 886                 ssValue >> kMasterKey;
 887                 if(pwallet->mapMasterKeys.count(nID) != 0)
 888                     return DB_CORRUPT;
 889                 pwallet->mapMasterKeys[nID] = kMasterKey;
 890                 if (pwallet->nMasterKeyMaxID < nID)
 891                     pwallet->nMasterKeyMaxID = nID;
 892             }
 893             else if (strType == "ckey")
 894             {
 895                 vector<unsigned char> vchPubKey;
 896                 ssKey >> vchPubKey;
 897                 vector<unsigned char> vchPrivKey;
 898                 ssValue >> vchPrivKey;
 899                 if (!pwallet->LoadCryptedKey(vchPubKey, vchPrivKey))
 900                     return DB_CORRUPT;
 901                 fIsEncrypted = true;
 902             }
 903             else if (strType == "defaultkey")
 904             {
 905                 ssValue >> pwallet->vchDefaultKey;
 906             }
 907             else if (strType == "pool")
 908             {
 909                 int64 nIndex;
 910                 ssKey >> nIndex;
 911                 pwallet->setKeyPool.insert(nIndex);
 912             }
 913             else if (strType == "version")
 914             {
 915                 ssValue >> nFileVersion;
 916                 if (nFileVersion == 10300)
 917                     nFileVersion = 300;
 918             }
 919             else if (strType == "setting")
 920             {
 921                 string strKey;
 922                 ssKey >> strKey;
 923
 924                 // Options
 925 #ifndef QT_GUI
 926                 if (strKey == "fGenerateBitcoins")  ssValue >> fGenerateBitcoins;
 927 #endif
 928                 if (strKey == "nTransactionFee")    ssValue >> nTransactionFee;
 929                 if (strKey == "fLimitProcessors")   ssValue >> fLimitProcessors;
 930                 if (strKey == "nLimitProcessors")   ssValue >> nLimitProcessors;
 931                 if (strKey == "fMinimizeToTray")    ssValue >> fMinimizeToTray;
 932                 if (strKey == "fMinimizeOnClose")   ssValue >> fMinimizeOnClose;
 933                 if (strKey == "fUseProxy")          ssValue >> fUseProxy;
 934                 if (strKey == "addrProxy")          ssValue >> addrProxy;
 935                 if (fHaveUPnP && strKey == "fUseUPnP")           ssValue >> fUseUPnP;
 936             }
 937             else if (strType == "minversion")
 938             {
 939                 int nMinVersion = 0;
 940                 ssValue >> nMinVersion;
 941                 if (nMinVersion > CLIENT_VERSION)
 942                     return DB_TOO_NEW;
 943             }
 944             else if (strType == "cscript")
 945             {
 946                 uint160 hash;
 947                 ssKey >> hash;
 948                 CScript script;
 949                 ssValue >> script;
 950                 if (!pwallet->LoadCScript(script))
 951                     return DB_CORRUPT;
 952             }
 953         }
 954         pcursor->close();
 955     }
 956
 957     BOOST_FOREACH(uint256 hash, vWalletUpgrade)
 958         WriteTx(hash, pwallet->mapWallet[hash]);
 959
 960     printf("nFileVersion = %d\n", nFileVersion);
 961     printf("fGenerateBitcoins = %d\n", fGenerateBitcoins);
 962     printf("nTransactionFee = %"PRI64d"\n", nTransactionFee);
 963     printf("fMinimizeToTray = %d\n", fMinimizeToTray);
 964     printf("fMinimizeOnClose = %d\n", fMinimizeOnClose);
 965     printf("fUseProxy = %d\n", fUseProxy);
 966     printf("addrProxy = %s\n", addrProxy.ToString().c_str());
 967     if (fHaveUPnP)
 968         printf("fUseUPnP = %d\n", fUseUPnP);
 969
 970
 971     // Rewrite encrypted wallets of versions 0.4.0 and 0.5.0rc:
 972     if (fIsEncrypted && (nFileVersion == 40000 || nFileVersion == 50000))
 973         return DB_NEED_REWRITE;
 974
 975     if (nFileVersion < CLIENT_VERSION) // Update
 976     {
 977         // Get rid of old debug.log file in current directory
 978         if (nFileVersion <= 105 && !pszSetDataDir[0])
 979             unlink("debug.log");
 980
 981         WriteVersion(CLIENT_VERSION);
 982     }
 983
 984     return DB_LOAD_OK;
 985 }
 986
 987 void ThreadFlushWalletDB(void* parg)
 988 {
 989     const string& strFile = ((const string*)parg)[0];
 990     static bool fOneThread;
 991     if (fOneThread)
 992         return;
 993     fOneThread = true;
 994     if (!GetBoolArg("-flushwallet", true))
 995         return;
 996
 997     unsigned int nLastSeen = nWalletDBUpdated;
 998     unsigned int nLastFlushed = nWalletDBUpdated;
 999     int64 nLastWalletUpdate = GetTime();
1000     while (!fShutdown)
1001     {
1002         Sleep(500);
1003
1004         if (nLastSeen != nWalletDBUpdated)
1005         {
1006             nLastSeen = nWalletDBUpdated;
1007             nLastWalletUpdate = GetTime();
1008         }
1009
1010         if (nLastFlushed != nWalletDBUpdated && GetTime() - nLastWalletUpdate >= 2)
1011         {
1012             TRY_CRITICAL_BLOCK(cs_db)
1013             {
1014                 // Don't do this if any databases are in use
1015                 int nRefCount = 0;
1016                 map<string, int>::iterator mi = mapFileUseCount.begin();
1017                 while (mi != mapFileUseCount.end())
1018                 {
1019                     nRefCount += (*mi).second;
1020                     mi++;
1021                 }
1022
1023                 if (nRefCount == 0 && !fShutdown)
1024                 {
1025                     map<string, int>::iterator mi = mapFileUseCount.find(strFile);
1026                     if (mi != mapFileUseCount.end())
1027                     {
1028                         printf("%s ", DateTimeStrFormat("%x %H:%M:%S", GetTime()).c_str());
1029                         printf("Flushing wallet.dat\n");
1030                         nLastFlushed = nWalletDBUpdated;
1031                         int64 nStart = GetTimeMillis();
1032
1033                         // Flush wallet.dat so it's self contained
1034                         CloseDb(strFile);
1035                         dbenv.txn_checkpoint(0, 0, 0);
1036                         dbenv.lsn_reset(strFile.c_str(), 0);
1037
1038                         mapFileUseCount.erase(mi++);
1039                         printf("Flushed wallet.dat %"PRI64d"ms\n", GetTimeMillis() - nStart);
1040                     }
1041                 }
1042             }
1043         }
1044     }
1045 }
1046
1047 bool BackupWallet(const CWallet& wallet, const string& strDest)
1048 {
1049     if (!wallet.fFileBacked)
1050         return false;
1051     while (!fShutdown)
1052     {
1053         CRITICAL_BLOCK(cs_db)
1054         {
1055             if (!mapFileUseCount.count(wallet.strWalletFile) || mapFileUseCount[wallet.strWalletFile] == 0)
1056             {
1057                 // Flush log data to the dat file
1058                 CloseDb(wallet.strWalletFile);
1059                 dbenv.txn_checkpoint(0, 0, 0);
1060                 dbenv.lsn_reset(wallet.strWalletFile.c_str(), 0);
1061                 mapFileUseCount.erase(wallet.strWalletFile);
1062
1063                 // Copy wallet.dat
1064                 filesystem::path pathSrc(GetDataDir() + "/" + wallet.strWalletFile);
1065                 filesystem::path pathDest(strDest);
1066                 if (filesystem::is_directory(pathDest))
1067                     pathDest = pathDest / wallet.strWalletFile;
1068
1069                 try {
1070 #if BOOST_VERSION >= 104000
1071                     filesystem::copy_file(pathSrc, pathDest, filesystem::copy_option::overwrite_if_exists);
1072 #else
1073                     filesystem::copy_file(pathSrc, pathDest);
1074 #endif
1075                     printf("copied wallet.dat to %s\n", pathDest.string().c_str());
1076                     return true;
1077                 } catch(const filesystem::filesystem_error &e) {
1078                     printf("error copying wallet.dat to %s - %s\n", pathDest.string().c_str(), e.what());
1079                     return false;
1080                 }
1081             }
1082         }
1083         Sleep(100);
1084     }
1085     return false;
1086 }