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/filesystem.hpp>
  10 #include <boost/filesystem/fstream.hpp>
  11
  12 using namespace std;
  13 using namespace boost;
  14
  15
  16 unsigned int nWalletDBUpdated;
  17 uint64 nAccountingEntryNumber = 0;
  18
  19
  20
  21 //
  22 // CDB
  23 //
  24
  25 static CCriticalSection cs_db;
  26 static bool fDbEnvInit = false;
  27 DbEnv dbenv(0);
  28 static map<string, int> mapFileUseCount;
  29 static map<string, Db*> mapDb;
  30
  31 static void EnvShutdown()
  32 {
  33     if (!fDbEnvInit)
  34         return;
  35
  36     fDbEnvInit = false;
  37     try
  38     {
  39         dbenv.close(0);
  40     }
  41     catch (const DbException& e)
  42     {
  43         printf("EnvShutdown exception: %s (%d)\n", e.what(), e.get_errno());
  44     }
  45     DbEnv(0).remove(GetDataDir().c_str(), 0);
  46 }
  47
  48 class CDBInit
  49 {
  50 public:
  51     CDBInit()
  52     {
  53     }
  54     ~CDBInit()
  55     {
  56         EnvShutdown();
  57     }
  58 }
  59 instance_of_cdbinit;
  60
  61
  62 CDB::CDB(const char* pszFile, const char* pszMode) : pdb(NULL)
  63 {
  64     int ret;
  65     if (pszFile == NULL)
  66         return;
  67
  68     fReadOnly = (!strchr(pszMode, '+') && !strchr(pszMode, 'w'));
  69     bool fCreate = strchr(pszMode, 'c');
  70     unsigned int nFlags = DB_THREAD;
  71     if (fCreate)
  72         nFlags |= DB_CREATE;
  73
  74     CRITICAL_BLOCK(cs_db)
  75     {
  76         if (!fDbEnvInit)
  77         {
  78             if (fShutdown)
  79                 return;
  80             string strDataDir = GetDataDir();
  81             string strLogDir = strDataDir + "/database";
  82             filesystem::create_directory(strLogDir.c_str());
  83             string strErrorFile = strDataDir + "/db.log";
  84             printf("dbenv.open strLogDir=%s strErrorFile=%s\n", strLogDir.c_str(), strErrorFile.c_str());
  85
  86             dbenv.set_lg_dir(strLogDir.c_str());
  87             dbenv.set_lg_max(10000000);
  88             dbenv.set_lk_max_locks(10000);
  89             dbenv.set_lk_max_objects(10000);
  90             dbenv.set_errfile(fopen(strErrorFile.c_str(), "a")); /// debug
  91             dbenv.set_flags(DB_AUTO_COMMIT, 1);
  92             ret = dbenv.open(strDataDir.c_str(),
  93                              DB_CREATE     |
  94                              DB_INIT_LOCK  |
  95                              DB_INIT_LOG   |
  96                              DB_INIT_MPOOL |
  97                              DB_INIT_TXN   |
  98                              DB_THREAD     |
  99                              DB_RECOVER,
 100                              S_IRUSR | S_IWUSR);
 101             if (ret > 0)
 102                 throw runtime_error(strprintf("CDB() : error %d opening database environment", ret));
 103             fDbEnvInit = true;
 104         }
 105
 106         strFile = pszFile;
 107         ++mapFileUseCount[strFile];
 108         pdb = mapDb[strFile];
 109         if (pdb == NULL)
 110         {
 111             pdb = new Db(&dbenv, 0);
 112
 113             ret = pdb->open(NULL,      // Txn pointer
 114                             pszFile,   // Filename
 115                             "main",    // Logical db name
 116                             DB_BTREE,  // Database type
 117                             nFlags,    // Flags
 118                             0);
 119
 120             if (ret > 0)
 121             {
 122                 delete pdb;
 123                 pdb = NULL;
 124                 CRITICAL_BLOCK(cs_db)
 125                     --mapFileUseCount[strFile];
 126                 strFile = "";
 127                 throw runtime_error(strprintf("CDB() : can't open database file %s, error %d", pszFile, ret));
 128             }
 129
 130             if (fCreate && !Exists(string("version")))
 131             {
 132                 bool fTmp = fReadOnly;
 133                 fReadOnly = false;
 134                 WriteVersion(VERSION);
 135                 fReadOnly = fTmp;
 136             }
 137
 138             mapDb[strFile] = pdb;
 139         }
 140     }
 141 }
 142
 143 void CDB::Close()
 144 {
 145     if (!pdb)
 146         return;
 147     if (!vTxn.empty())
 148         vTxn.front()->abort();
 149     vTxn.clear();
 150     pdb = NULL;
 151
 152     // Flush database activity from memory pool to disk log
 153     unsigned int nMinutes = 0;
 154     if (fReadOnly)
 155         nMinutes = 1;
 156     if (strFile == "addr.dat")
 157         nMinutes = 2;
 158     if (strFile == "blkindex.dat" && IsInitialBlockDownload() && nBestHeight % 500 != 0)
 159         nMinutes = 1;
 160     dbenv.txn_checkpoint(0, nMinutes, 0);
 161
 162     CRITICAL_BLOCK(cs_db)
 163         --mapFileUseCount[strFile];
 164 }
 165
 166 void static CloseDb(const string& strFile)
 167 {
 168     CRITICAL_BLOCK(cs_db)
 169     {
 170         if (mapDb[strFile] != NULL)
 171         {
 172             // Close the database handle
 173             Db* pdb = mapDb[strFile];
 174             pdb->close(0);
 175             delete pdb;
 176             mapDb[strFile] = NULL;
 177         }
 178     }
 179 }
 180
 181 bool CDB::Rewrite(const string& strFile, const char* pszSkip)
 182 {
 183     while (!fShutdown)
 184     {
 185         CRITICAL_BLOCK(cs_db)
 186         {
 187             if (!mapFileUseCount.count(strFile) || mapFileUseCount[strFile] == 0)
 188             {
 189                 // Flush log data to the dat file
 190                 CloseDb(strFile);
 191                 dbenv.txn_checkpoint(0, 0, 0);
 192                 dbenv.lsn_reset(strFile.c_str(), 0);
 193                 mapFileUseCount.erase(strFile);
 194
 195                 bool fSuccess = true;
 196                 printf("Rewriting %s...\n", strFile.c_str());
 197                 string strFileRes = strFile + ".rewrite";
 198                 { // surround usage of db with extra {}
 199                     CDB db(strFile.c_str(), "r");
 200                     Db* pdbCopy = new Db(&dbenv, 0);
 201
 202                     int ret = pdbCopy->open(NULL,                 // Txn pointer
 203                                             strFileRes.c_str(),   // Filename
 204                                             "main",    // Logical db name
 205                                             DB_BTREE,  // Database type
 206                                             DB_CREATE,    // Flags
 207                                             0);
 208                     if (ret > 0)
 209                     {
 210                         printf("Cannot create database file %s\n", strFileRes.c_str());
 211                         fSuccess = false;
 212                     }
 213
 214                     Dbc* pcursor = db.GetCursor();
 215                     if (pcursor)
 216                         while (fSuccess)
 217                         {
 218                             CDataStream ssKey;
 219                             CDataStream ssValue;
 220                             int ret = db.ReadAtCursor(pcursor, ssKey, ssValue, DB_NEXT);
 221                             if (ret == DB_NOTFOUND)
 222                             {
 223                                 pcursor->close();
 224                                 break;
 225                             }
 226                             else if (ret != 0)
 227                             {
 228                                 pcursor->close();
 229                                 fSuccess = false;
 230                                 break;
 231                             }
 232                             if (pszSkip &&
 233                                 strncmp(&ssKey[0], pszSkip, std::min(ssKey.size(), strlen(pszSkip))) == 0)
 234                                 continue;
 235                             if (strncmp(&ssKey[0], "\x07version", 8) == 0)
 236                             {
 237                                 // Update version:
 238                                 ssValue.clear();
 239                                 ssValue << VERSION;
 240                             }
 241                             Dbt datKey(&ssKey[0], ssKey.size());
 242                             Dbt datValue(&ssValue[0], ssValue.size());
 243                             int ret2 = pdbCopy->put(NULL, &datKey, &datValue, DB_NOOVERWRITE);
 244                             if (ret2 > 0)
 245                                 fSuccess = false;
 246                         }
 247                     if (fSuccess)
 248                     {
 249                         db.Close();
 250                         CloseDb(strFile);
 251                         if (pdbCopy->close(0))
 252                             fSuccess = false;
 253                         delete pdbCopy;
 254                     }
 255                 }
 256                 if (fSuccess)
 257                 {
 258                     Db dbA(&dbenv, 0);
 259                     if (dbA.remove(strFile.c_str(), NULL, 0))
 260                         fSuccess = false;
 261                     Db dbB(&dbenv, 0);
 262                     if (dbB.rename(strFileRes.c_str(), NULL, strFile.c_str(), 0))
 263                         fSuccess = false;
 264                 }
 265                 if (!fSuccess)
 266                     printf("Rewriting of %s FAILED!\n", strFileRes.c_str());
 267                 return fSuccess;
 268             }
 269         }
 270         Sleep(100);
 271     }
 272     return false;
 273 }
 274
 275
 276 void DBFlush(bool fShutdown)
 277 {
 278     // Flush log data to the actual data file
 279     //  on all files that are not in use
 280     printf("DBFlush(%s)%s\n", fShutdown ? "true" : "false", fDbEnvInit ? "" : " db not started");
 281     if (!fDbEnvInit)
 282         return;
 283     CRITICAL_BLOCK(cs_db)
 284     {
 285         map<string, int>::iterator mi = mapFileUseCount.begin();
 286         while (mi != mapFileUseCount.end())
 287         {
 288             string strFile = (*mi).first;
 289             int nRefCount = (*mi).second;
 290             printf("%s refcount=%d\n", strFile.c_str(), nRefCount);
 291             if (nRefCount == 0)
 292             {
 293                 // Move log data to the dat file
 294                 CloseDb(strFile);
 295                 dbenv.txn_checkpoint(0, 0, 0);
 296                 printf("%s flush\n", strFile.c_str());
 297                 dbenv.lsn_reset(strFile.c_str(), 0);
 298                 mapFileUseCount.erase(mi++);
 299             }
 300             else
 301                 mi++;
 302         }
 303         if (fShutdown)
 304         {
 305             char** listp;
 306             if (mapFileUseCount.empty())
 307             {
 308                 dbenv.log_archive(&listp, DB_ARCH_REMOVE);
 309                 EnvShutdown();
 310             }
 311         }
 312     }
 313 }
 314
 315
 316
 317
 318
 319
 320 //
 321 // CTxDB
 322 //
 323
 324 bool CTxDB::ReadTxIndex(uint256 hash, CTxIndex& txindex)
 325 {
 326     assert(!fClient);
 327     txindex.SetNull();
 328     return Read(make_pair(string("tx"), hash), txindex);
 329 }
 330
 331 bool CTxDB::UpdateTxIndex(uint256 hash, const CTxIndex& txindex)
 332 {
 333     assert(!fClient);
 334     return Write(make_pair(string("tx"), hash), txindex);
 335 }
 336
 337 bool CTxDB::AddTxIndex(const CTransaction& tx, const CDiskTxPos& pos, int nHeight)
 338 {
 339     assert(!fClient);
 340
 341     // Add to tx index
 342     uint256 hash = tx.GetHash();
 343     CTxIndex txindex(pos, tx.vout.size());
 344     return Write(make_pair(string("tx"), hash), txindex);
 345 }
 346
 347 bool CTxDB::EraseTxIndex(const CTransaction& tx)
 348 {
 349     assert(!fClient);
 350     uint256 hash = tx.GetHash();
 351
 352     return Erase(make_pair(string("tx"), hash));
 353 }
 354
 355 bool CTxDB::ContainsTx(uint256 hash)
 356 {
 357     assert(!fClient);
 358     return Exists(make_pair(string("tx"), hash));
 359 }
 360
 361 bool CTxDB::ReadOwnerTxes(uint160 hash160, int nMinHeight, vector<CTransaction>& vtx)
 362 {
 363     assert(!fClient);
 364     vtx.clear();
 365
 366     // Get cursor
 367     Dbc* pcursor = GetCursor();
 368     if (!pcursor)
 369         return false;
 370
 371     unsigned int fFlags = DB_SET_RANGE;
 372     loop
 373     {
 374         // Read next record
 375         CDataStream ssKey;
 376         if (fFlags == DB_SET_RANGE)
 377             ssKey << string("owner") << hash160 << CDiskTxPos(0, 0, 0);
 378         CDataStream ssValue;
 379         int ret = ReadAtCursor(pcursor, ssKey, ssValue, fFlags);
 380         fFlags = DB_NEXT;
 381         if (ret == DB_NOTFOUND)
 382             break;
 383         else if (ret != 0)
 384         {
 385             pcursor->close();
 386             return false;
 387         }
 388
 389         // Unserialize
 390         string strType;
 391         uint160 hashItem;
 392         CDiskTxPos pos;
 393         ssKey >> strType >> hashItem >> pos;
 394         int nItemHeight;
 395         ssValue >> nItemHeight;
 396
 397         // Read transaction
 398         if (strType != "owner" || hashItem != hash160)
 399             break;
 400         if (nItemHeight >= nMinHeight)
 401         {
 402             vtx.resize(vtx.size()+1);
 403             if (!vtx.back().ReadFromDisk(pos))
 404             {
 405                 pcursor->close();
 406                 return false;
 407             }
 408         }
 409     }
 410
 411     pcursor->close();
 412     return true;
 413 }
 414
 415 bool CTxDB::ReadDiskTx(uint256 hash, CTransaction& tx, CTxIndex& txindex)
 416 {
 417     assert(!fClient);
 418     tx.SetNull();
 419     if (!ReadTxIndex(hash, txindex))
 420         return false;
 421     return (tx.ReadFromDisk(txindex.pos));
 422 }
 423
 424 bool CTxDB::ReadDiskTx(uint256 hash, CTransaction& tx)
 425 {
 426     CTxIndex txindex;
 427     return ReadDiskTx(hash, tx, txindex);
 428 }
 429
 430 bool CTxDB::ReadDiskTx(COutPoint outpoint, CTransaction& tx, CTxIndex& txindex)
 431 {
 432     return ReadDiskTx(outpoint.hash, tx, txindex);
 433 }
 434
 435 bool CTxDB::ReadDiskTx(COutPoint outpoint, CTransaction& tx)
 436 {
 437     CTxIndex txindex;
 438     return ReadDiskTx(outpoint.hash, tx, txindex);
 439 }
 440
 441 bool CTxDB::WriteBlockIndex(const CDiskBlockIndex& blockindex)
 442 {
 443     return Write(make_pair(string("blockindex"), blockindex.GetBlockHash()), blockindex);
 444 }
 445
 446 bool CTxDB::EraseBlockIndex(uint256 hash)
 447 {
 448     return Erase(make_pair(string("blockindex"), hash));
 449 }
 450
 451 bool CTxDB::ReadHashBestChain(uint256& hashBestChain)
 452 {
 453     return Read(string("hashBestChain"), hashBestChain);
 454 }
 455
 456 bool CTxDB::WriteHashBestChain(uint256 hashBestChain)
 457 {
 458     return Write(string("hashBestChain"), hashBestChain);
 459 }
 460
 461 bool CTxDB::ReadBestInvalidWork(CBigNum& bnBestInvalidWork)
 462 {
 463     return Read(string("bnBestInvalidWork"), bnBestInvalidWork);
 464 }
 465
 466 bool CTxDB::WriteBestInvalidWork(CBigNum bnBestInvalidWork)
 467 {
 468     return Write(string("bnBestInvalidWork"), bnBestInvalidWork);
 469 }
 470
 471 CBlockIndex static * InsertBlockIndex(uint256 hash)
 472 {
 473     if (hash == 0)
 474         return NULL;
 475
 476     // Return existing
 477     map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.find(hash);
 478     if (mi != mapBlockIndex.end())
 479         return (*mi).second;
 480
 481     // Create new
 482     CBlockIndex* pindexNew = new CBlockIndex();
 483     if (!pindexNew)
 484         throw runtime_error("LoadBlockIndex() : new CBlockIndex failed");
 485     mi = mapBlockIndex.insert(make_pair(hash, pindexNew)).first;
 486     pindexNew->phashBlock = &((*mi).first);
 487
 488     return pindexNew;
 489 }
 490
 491 bool CTxDB::LoadBlockIndex()
 492 {
 493     // Get database cursor
 494     Dbc* pcursor = GetCursor();
 495     if (!pcursor)
 496         return false;
 497
 498     // Load mapBlockIndex
 499     unsigned int fFlags = DB_SET_RANGE;
 500     loop
 501     {
 502         // Read next record
 503         CDataStream ssKey;
 504         if (fFlags == DB_SET_RANGE)
 505             ssKey << make_pair(string("blockindex"), uint256(0));
 506         CDataStream ssValue;
 507         int ret = ReadAtCursor(pcursor, ssKey, ssValue, fFlags);
 508         fFlags = DB_NEXT;
 509         if (ret == DB_NOTFOUND)
 510             break;
 511         else if (ret != 0)
 512             return false;
 513
 514         // Unserialize
 515         string strType;
 516         ssKey >> strType;
 517         if (strType == "blockindex")
 518         {
 519             CDiskBlockIndex diskindex;
 520             ssValue >> diskindex;
 521
 522             // Construct block index object
 523             CBlockIndex* pindexNew = InsertBlockIndex(diskindex.GetBlockHash());
 524             pindexNew->pprev          = InsertBlockIndex(diskindex.hashPrev);
 525             pindexNew->pnext          = InsertBlockIndex(diskindex.hashNext);
 526             pindexNew->nFile          = diskindex.nFile;
 527             pindexNew->nBlockPos      = diskindex.nBlockPos;
 528             pindexNew->nHeight        = diskindex.nHeight;
 529             pindexNew->nVersion       = diskindex.nVersion;
 530             pindexNew->hashMerkleRoot = diskindex.hashMerkleRoot;
 531             pindexNew->nTime          = diskindex.nTime;
 532             pindexNew->nBits          = diskindex.nBits;
 533             pindexNew->nNonce         = diskindex.nNonce;
 534
 535             // Watch for genesis block
 536             if (pindexGenesisBlock == NULL && diskindex.GetBlockHash() == hashGenesisBlock)
 537                 pindexGenesisBlock = pindexNew;
 538
 539             if (!pindexNew->CheckIndex())
 540                 return error("LoadBlockIndex() : CheckIndex failed at %d", pindexNew->nHeight);
 541         }
 542         else
 543         {
 544             break;
 545         }
 546     }
 547     pcursor->close();
 548
 549     // Calculate bnChainWork
 550     vector<pair<int, CBlockIndex*> > vSortedByHeight;
 551     vSortedByHeight.reserve(mapBlockIndex.size());
 552     BOOST_FOREACH(const PAIRTYPE(uint256, CBlockIndex*)& item, mapBlockIndex)
 553     {
 554         CBlockIndex* pindex = item.second;
 555         vSortedByHeight.push_back(make_pair(pindex->nHeight, pindex));
 556     }
 557     sort(vSortedByHeight.begin(), vSortedByHeight.end());
 558     BOOST_FOREACH(const PAIRTYPE(int, CBlockIndex*)& item, vSortedByHeight)
 559     {
 560         CBlockIndex* pindex = item.second;
 561         pindex->bnChainWork = (pindex->pprev ? pindex->pprev->bnChainWork : 0) + pindex->GetBlockWork();
 562     }
 563
 564     // Load hashBestChain pointer to end of best chain
 565     if (!ReadHashBestChain(hashBestChain))
 566     {
 567         if (pindexGenesisBlock == NULL)
 568             return true;
 569         return error("CTxDB::LoadBlockIndex() : hashBestChain not loaded");
 570     }
 571     if (!mapBlockIndex.count(hashBestChain))
 572         return error("CTxDB::LoadBlockIndex() : hashBestChain not found in the block index");
 573     pindexBest = mapBlockIndex[hashBestChain];
 574     nBestHeight = pindexBest->nHeight;
 575     bnBestChainWork = pindexBest->bnChainWork;
 576     printf("LoadBlockIndex(): hashBestChain=%s  height=%d\n", hashBestChain.ToString().substr(0,20).c_str(), nBestHeight);
 577
 578     // Load bnBestInvalidWork, OK if it doesn't exist
 579     ReadBestInvalidWork(bnBestInvalidWork);
 580
 581     // Verify blocks in the best chain
 582     CBlockIndex* pindexFork = NULL;
 583     for (CBlockIndex* pindex = pindexBest; pindex && pindex->pprev; pindex = pindex->pprev)
 584     {
 585         if (pindex->nHeight < nBestHeight-2500 && !mapArgs.count("-checkblocks"))
 586             break;
 587         CBlock block;
 588         if (!block.ReadFromDisk(pindex))
 589             return error("LoadBlockIndex() : block.ReadFromDisk failed");
 590         if (!block.CheckBlock())
 591         {
 592             printf("LoadBlockIndex() : *** found bad block at %d, hash=%s\n", pindex->nHeight, pindex->GetBlockHash().ToString().c_str());
 593             pindexFork = pindex->pprev;
 594         }
 595     }
 596     if (pindexFork)
 597     {
 598         // Reorg back to the fork
 599         printf("LoadBlockIndex() : *** moving best chain pointer back to block %d\n", pindexFork->nHeight);
 600         CBlock block;
 601         if (!block.ReadFromDisk(pindexFork))
 602             return error("LoadBlockIndex() : block.ReadFromDisk failed");
 603         CTxDB txdb;
 604         block.SetBestChain(txdb, pindexFork);
 605     }
 606
 607     return true;
 608 }
 609
 610
 611
 612
 613
 614 //
 615 // CAddrDB
 616 //
 617
 618 bool CAddrDB::WriteAddress(const CAddress& addr)
 619 {
 620     return Write(make_pair(string("addr"), addr.GetKey()), addr);
 621 }
 622
 623 bool CAddrDB::EraseAddress(const CAddress& addr)
 624 {
 625     return Erase(make_pair(string("addr"), addr.GetKey()));
 626 }
 627
 628 bool CAddrDB::LoadAddresses()
 629 {
 630     CRITICAL_BLOCK(cs_mapAddresses)
 631     {
 632         // Load user provided addresses
 633         CAutoFile filein = fopen((GetDataDir() + "/addr.txt").c_str(), "rt");
 634         if (filein)
 635         {
 636             try
 637             {
 638                 char psz[1000];
 639                 while (fgets(psz, sizeof(psz), filein))
 640                 {
 641                     CAddress addr(psz, false, NODE_NETWORK);
 642                     addr.nTime = 0; // so it won't relay unless successfully connected
 643                     if (addr.IsValid())
 644                         AddAddress(addr);
 645                 }
 646             }
 647             catch (...) { }
 648         }
 649
 650         // Get cursor
 651         Dbc* pcursor = GetCursor();
 652         if (!pcursor)
 653             return false;
 654
 655         loop
 656         {
 657             // Read next record
 658             CDataStream ssKey;
 659             CDataStream ssValue;
 660             int ret = ReadAtCursor(pcursor, ssKey, ssValue);
 661             if (ret == DB_NOTFOUND)
 662                 break;
 663             else if (ret != 0)
 664                 return false;
 665
 666             // Unserialize
 667             string strType;
 668             ssKey >> strType;
 669             if (strType == "addr")
 670             {
 671                 CAddress addr;
 672                 ssValue >> addr;
 673                 mapAddresses.insert(make_pair(addr.GetKey(), addr));
 674             }
 675         }
 676         pcursor->close();
 677
 678         printf("Loaded %d addresses\n", mapAddresses.size());
 679     }
 680
 681     return true;
 682 }
 683
 684 bool LoadAddresses()
 685 {
 686     return CAddrDB("cr+").LoadAddresses();
 687 }
 688
 689
 690
 691
 692 //
 693 // CWalletDB
 694 //
 695
 696 bool CWalletDB::WriteName(const string& strAddress, const string& strName)
 697 {
 698     nWalletDBUpdated++;
 699     return Write(make_pair(string("name"), strAddress), strName);
 700 }
 701
 702 bool CWalletDB::EraseName(const string& strAddress)
 703 {
 704     // This should only be used for sending addresses, never for receiving addresses,
 705     // receiving addresses must always have an address book entry if they're not change return.
 706     nWalletDBUpdated++;
 707     return Erase(make_pair(string("name"), strAddress));
 708 }
 709
 710 bool CWalletDB::ReadAccount(const string& strAccount, CAccount& account)
 711 {
 712     account.SetNull();
 713     return Read(make_pair(string("acc"), strAccount), account);
 714 }
 715
 716 bool CWalletDB::WriteAccount(const string& strAccount, const CAccount& account)
 717 {
 718     return Write(make_pair(string("acc"), strAccount), account);
 719 }
 720
 721 bool CWalletDB::WriteAccountingEntry(const CAccountingEntry& acentry)
 722 {
 723     return Write(boost::make_tuple(string("acentry"), acentry.strAccount, ++nAccountingEntryNumber), acentry);
 724 }
 725
 726 int64 CWalletDB::GetAccountCreditDebit(const string& strAccount)
 727 {
 728     list<CAccountingEntry> entries;
 729     ListAccountCreditDebit(strAccount, entries);
 730
 731     int64 nCreditDebit = 0;
 732     BOOST_FOREACH (const CAccountingEntry& entry, entries)
 733         nCreditDebit += entry.nCreditDebit;
 734
 735     return nCreditDebit;
 736 }
 737
 738 void CWalletDB::ListAccountCreditDebit(const string& strAccount, list<CAccountingEntry>& entries)
 739 {
 740     bool fAllAccounts = (strAccount == "*");
 741
 742     Dbc* pcursor = GetCursor();
 743     if (!pcursor)
 744         throw runtime_error("CWalletDB::ListAccountCreditDebit() : cannot create DB cursor");
 745     unsigned int fFlags = DB_SET_RANGE;
 746     loop
 747     {
 748         // Read next record
 749         CDataStream ssKey;
 750         if (fFlags == DB_SET_RANGE)
 751             ssKey << boost::make_tuple(string("acentry"), (fAllAccounts? string("") : strAccount), uint64(0));
 752         CDataStream ssValue;
 753         int ret = ReadAtCursor(pcursor, ssKey, ssValue, fFlags);
 754         fFlags = DB_NEXT;
 755         if (ret == DB_NOTFOUND)
 756             break;
 757         else if (ret != 0)
 758         {
 759             pcursor->close();
 760             throw runtime_error("CWalletDB::ListAccountCreditDebit() : error scanning DB");
 761         }
 762
 763         // Unserialize
 764         string strType;
 765         ssKey >> strType;
 766         if (strType != "acentry")
 767             break;
 768         CAccountingEntry acentry;
 769         ssKey >> acentry.strAccount;
 770         if (!fAllAccounts && acentry.strAccount != strAccount)
 771             break;
 772
 773         ssValue >> acentry;
 774         entries.push_back(acentry);
 775     }
 776
 777     pcursor->close();
 778 }
 779
 780
 781 int CWalletDB::LoadWallet(CWallet* pwallet)
 782 {
 783     pwallet->vchDefaultKey.clear();
 784     int nFileVersion = 0;
 785     vector<uint256> vWalletUpgrade;
 786     bool fIsEncrypted = false;
 787
 788     // Modify defaults
 789 #ifndef __WXMSW__
 790     // Tray icon sometimes disappears on 9.10 karmic koala 64-bit, leaving no way to access the program
 791     fMinimizeToTray = false;
 792     fMinimizeOnClose = false;
 793 #endif
 794
 795     //// todo: shouldn't we catch exceptions and try to recover and continue?
 796     CRITICAL_BLOCK(pwallet->cs_wallet)
 797     {
 798         // Get cursor
 799         Dbc* pcursor = GetCursor();
 800         if (!pcursor)
 801         {
 802             printf("Error getting wallet database cursor\n");
 803             return DB_CORRUPT;
 804         }
 805
 806         loop
 807         {
 808             // Read next record
 809             CDataStream ssKey;
 810             CDataStream ssValue;
 811             int ret = ReadAtCursor(pcursor, ssKey, ssValue);
 812             if (ret == DB_NOTFOUND)
 813                 break;
 814             else if (ret != 0)
 815             {
 816                 printf("Error reading next record from wallet database\n");
 817                 return DB_CORRUPT;
 818             }
 819
 820             // Unserialize
 821             // Taking advantage of the fact that pair serialization
 822             // is just the two items serialized one after the other
 823             string strType;
 824             ssKey >> strType;
 825             if (strType == "name")
 826             {
 827                 string strAddress;
 828                 ssKey >> strAddress;
 829                 ssValue >> pwallet->mapAddressBook[strAddress];
 830             }
 831             else if (strType == "tx")
 832             {
 833                 uint256 hash;
 834                 ssKey >> hash;
 835                 CWalletTx& wtx = pwallet->mapWallet[hash];
 836                 ssValue >> wtx;
 837                 wtx.pwallet = pwallet;
 838
 839                 if (wtx.GetHash() != hash)
 840                     printf("Error in wallet.dat, hash mismatch\n");
 841
 842                 // Undo serialize changes in 31600
 843                 if (31404 <= wtx.fTimeReceivedIsTxTime && wtx.fTimeReceivedIsTxTime <= 31703)
 844                 {
 845                     if (!ssValue.empty())
 846                     {
 847                         char fTmp;
 848                         char fUnused;
 849                         ssValue >> fTmp >> fUnused >> wtx.strFromAccount;
 850                         printf("LoadWallet() upgrading tx ver=%d %d '%s' %s\n", wtx.fTimeReceivedIsTxTime, fTmp, wtx.strFromAccount.c_str(), hash.ToString().c_str());
 851                         wtx.fTimeReceivedIsTxTime = fTmp;
 852                     }
 853                     else
 854                     {
 855                         printf("LoadWallet() repairing tx ver=%d %s\n", wtx.fTimeReceivedIsTxTime, hash.ToString().c_str());
 856                         wtx.fTimeReceivedIsTxTime = 0;
 857                     }
 858                     vWalletUpgrade.push_back(hash);
 859                 }
 860
 861                 //// debug print
 862                 //printf("LoadWallet  %s\n", wtx.GetHash().ToString().c_str());
 863                 //printf(" %12I64d  %s  %s  %s\n",
 864                 //    wtx.vout[0].nValue,
 865                 //    DateTimeStrFormat("%x %H:%M:%S", wtx.GetBlockTime()).c_str(),
 866                 //    wtx.hashBlock.ToString().substr(0,20).c_str(),
 867                 //    wtx.mapValue["message"].c_str());
 868             }
 869             else if (strType == "acentry")
 870             {
 871                 string strAccount;
 872                 ssKey >> strAccount;
 873                 uint64 nNumber;
 874                 ssKey >> nNumber;
 875                 if (nNumber > nAccountingEntryNumber)
 876                     nAccountingEntryNumber = nNumber;
 877             }
 878             else if (strType == "key" || strType == "wkey")
 879             {
 880                 vector<unsigned char> vchPubKey;
 881                 ssKey >> vchPubKey;
 882                 CKey key;
 883                 if (strType == "key")
 884                 {
 885                     CPrivKey pkey;
 886                     ssValue >> pkey;
 887                     key.SetPrivKey(pkey);
 888                     if (key.GetPubKey() != vchPubKey)
 889                     {
 890                         printf("Error reading wallet database: CPrivKey pubkey inconsistency\n");
 891                         return DB_CORRUPT;
 892                     }
 893                     if (!key.IsValid())
 894                     {
 895                         printf("Error reading wallet database: invalid CPrivKey\n");
 896                         return DB_CORRUPT;
 897                     }
 898                 }
 899                 else
 900                 {
 901                     CWalletKey wkey;
 902                     ssValue >> wkey;
 903                     key.SetPrivKey(wkey.vchPrivKey);
 904                     if (key.GetPubKey() != vchPubKey)
 905                     {
 906                         printf("Error reading wallet database: CWalletKey pubkey inconsistency\n");
 907                         return DB_CORRUPT;
 908                     }
 909                     if (!key.IsValid())
 910                     {
 911                         printf("Error reading wallet database: invalid CWalletKey\n");
 912                         return DB_CORRUPT;
 913                     }
 914                 }
 915                 if (!pwallet->LoadKey(key))
 916                 {
 917                     printf("Error reading wallet database: LoadKey failed\n");
 918                     return DB_CORRUPT;
 919                 }
 920             }
 921             else if (strType == "mkey")
 922             {
 923                 unsigned int nID;
 924                 ssKey >> nID;
 925                 CMasterKey kMasterKey;
 926                 ssValue >> kMasterKey;
 927                 if(pwallet->mapMasterKeys.count(nID) != 0)
 928                 {
 929                     printf("Error reading wallet database: duplicate CMasterKey id %u\n", nID);
 930                     return DB_CORRUPT;
 931                 }
 932                 pwallet->mapMasterKeys[nID] = kMasterKey;
 933                 if (pwallet->nMasterKeyMaxID < nID)
 934                     pwallet->nMasterKeyMaxID = nID;
 935             }
 936             else if (strType == "ckey")
 937             {
 938                 vector<unsigned char> vchPubKey;
 939                 ssKey >> vchPubKey;
 940                 vector<unsigned char> vchPrivKey;
 941                 ssValue >> vchPrivKey;
 942                 if (!pwallet->LoadCryptedKey(vchPubKey, vchPrivKey))
 943                 {
 944                     printf("Error reading wallet database: LoadCryptedKey failed\n");
 945                     return DB_CORRUPT;
 946                 }
 947                 fIsEncrypted = true;
 948             }
 949             else if (strType == "defaultkey")
 950             {
 951                 ssValue >> pwallet->vchDefaultKey;
 952             }
 953             else if (strType == "pool")
 954             {
 955                 int64 nIndex;
 956                 ssKey >> nIndex;
 957                 pwallet->setKeyPool.insert(nIndex);
 958             }
 959             else if (strType == "version")
 960             {
 961                 ssValue >> nFileVersion;
 962                 if (nFileVersion == 10300)
 963                     nFileVersion = 300;
 964             }
 965             else if (strType == "setting")
 966             {
 967                 string strKey;
 968                 ssKey >> strKey;
 969
 970                 // Options
 971 #ifndef GUI
 972                 if (strKey == "fGenerateBitcoins")  ssValue >> fGenerateBitcoins;
 973 #endif
 974                 if (strKey == "nTransactionFee")    ssValue >> nTransactionFee;
 975                 if (strKey == "fLimitProcessors")   ssValue >> fLimitProcessors;
 976                 if (strKey == "nLimitProcessors")   ssValue >> nLimitProcessors;
 977                 if (strKey == "fMinimizeToTray")    ssValue >> fMinimizeToTray;
 978                 if (strKey == "fMinimizeOnClose")   ssValue >> fMinimizeOnClose;
 979                 if (strKey == "fUseProxy")          ssValue >> fUseProxy;
 980                 if (strKey == "addrProxy")          ssValue >> addrProxy;
 981                 if (fHaveUPnP && strKey == "fUseUPnP")           ssValue >> fUseUPnP;
 982             }
 983             else if (strType == "minversion")
 984             {
 985                 int nMinVersion = 0;
 986                 ssValue >> nMinVersion;
 987                 if (nMinVersion > VERSION)
 988                     return DB_TOO_NEW;
 989             }
 990         }
 991         pcursor->close();
 992     }
 993
 994     BOOST_FOREACH(uint256 hash, vWalletUpgrade)
 995         WriteTx(hash, pwallet->mapWallet[hash]);
 996
 997     printf("nFileVersion = %d\n", nFileVersion);
 998     printf("fGenerateBitcoins = %d\n", fGenerateBitcoins);
 999     printf("nTransactionFee = %"PRI64d"\n", nTransactionFee);
1000     printf("fMinimizeToTray = %d\n", fMinimizeToTray);
1001     printf("fMinimizeOnClose = %d\n", fMinimizeOnClose);
1002     printf("fUseProxy = %d\n", fUseProxy);
1003     printf("addrProxy = %s\n", addrProxy.ToString().c_str());
1004     if (fHaveUPnP)
1005         printf("fUseUPnP = %d\n", fUseUPnP);
1006
1007
1008     // Rewrite encrypted wallets of versions 0.4.0 and 0.5.0rc:
1009     if (fIsEncrypted && (nFileVersion == 40000 || nFileVersion == 50000))
1010         return DB_NEED_REWRITE;
1011
1012     if (nFileVersion < VERSION) // Update
1013     {
1014         // Get rid of old debug.log file in current directory
1015         if (nFileVersion <= 105 && !pszSetDataDir[0])
1016             unlink("debug.log");
1017
1018         WriteVersion(VERSION);
1019     }
1020
1021     return DB_LOAD_OK;
1022 }
1023
1024 void ThreadFlushWalletDB(void* parg)
1025 {
1026     const string& strFile = ((const string*)parg)[0];
1027     static bool fOneThread;
1028     if (fOneThread)
1029         return;
1030     fOneThread = true;
1031     if (mapArgs.count("-noflushwallet"))
1032         return;
1033
1034     unsigned int nLastSeen = nWalletDBUpdated;
1035     unsigned int nLastFlushed = nWalletDBUpdated;
1036     int64 nLastWalletUpdate = GetTime();
1037     while (!fShutdown)
1038     {
1039         Sleep(500);
1040
1041         if (nLastSeen != nWalletDBUpdated)
1042         {
1043             nLastSeen = nWalletDBUpdated;
1044             nLastWalletUpdate = GetTime();
1045         }
1046
1047         if (nLastFlushed != nWalletDBUpdated && GetTime() - nLastWalletUpdate >= 2)
1048         {
1049             TRY_CRITICAL_BLOCK(cs_db)
1050             {
1051                 // Don't do this if any databases are in use
1052                 int nRefCount = 0;
1053                 map<string, int>::iterator mi = mapFileUseCount.begin();
1054                 while (mi != mapFileUseCount.end())
1055                 {
1056                     nRefCount += (*mi).second;
1057                     mi++;
1058                 }
1059
1060                 if (nRefCount == 0 && !fShutdown)
1061                 {
1062                     map<string, int>::iterator mi = mapFileUseCount.find(strFile);
1063                     if (mi != mapFileUseCount.end())
1064                     {
1065                         printf("%s ", DateTimeStrFormat("%x %H:%M:%S", GetTime()).c_str());
1066                         printf("Flushing wallet.dat\n");
1067                         nLastFlushed = nWalletDBUpdated;
1068                         int64 nStart = GetTimeMillis();
1069
1070                         // Flush wallet.dat so it's self contained
1071                         CloseDb(strFile);
1072                         dbenv.txn_checkpoint(0, 0, 0);
1073                         dbenv.lsn_reset(strFile.c_str(), 0);
1074
1075                         mapFileUseCount.erase(mi++);
1076                         printf("Flushed wallet.dat %"PRI64d"ms\n", GetTimeMillis() - nStart);
1077                     }
1078                 }
1079             }
1080         }
1081     }
1082 }
1083
1084 bool BackupWallet(const CWallet& wallet, const string& strDest)
1085 {
1086     if (!wallet.fFileBacked)
1087         return false;
1088     while (!fShutdown)
1089     {
1090         CRITICAL_BLOCK(cs_db)
1091         {
1092             if (!mapFileUseCount.count(wallet.strWalletFile) || mapFileUseCount[wallet.strWalletFile] == 0)
1093             {
1094                 // Flush log data to the dat file
1095                 CloseDb(wallet.strWalletFile);
1096                 dbenv.txn_checkpoint(0, 0, 0);
1097                 dbenv.lsn_reset(wallet.strWalletFile.c_str(), 0);
1098                 mapFileUseCount.erase(wallet.strWalletFile);
1099
1100                 // Copy wallet.dat
1101                 filesystem::path pathSrc(GetDataDir() + "/" + wallet.strWalletFile);
1102                 filesystem::path pathDest(strDest);
1103                 if (filesystem::is_directory(pathDest))
1104                     pathDest = pathDest / wallet.strWalletFile;
1105 #if BOOST_VERSION >= 104000
1106                 filesystem::copy_file(pathSrc, pathDest, filesystem::copy_option::overwrite_if_exists);
1107 #else
1108                 filesystem::copy_file(pathSrc, pathDest);
1109 #endif
1110                 printf("copied wallet.dat to %s\n", pathDest.string().c_str());
1111
1112                 return true;
1113             }
1114         }
1115         Sleep(100);
1116     }
1117     return false;
1118 }