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 COPYING 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         int nItemHeight;
 394
 395         try {
 396             ssKey >> strType >> hashItem >> pos;
 397             ssValue >> nItemHeight;
 398         }
 399         catch (std::exception &e) {
 400             return error("%s() : deserialize error", __PRETTY_FUNCTION__);
 401         }
 402
 403         // Read transaction
 404         if (strType != "owner" || hashItem != hash160)
 405             break;
 406         if (nItemHeight >= nMinHeight)
 407         {
 408             vtx.resize(vtx.size()+1);
 409             if (!vtx.back().ReadFromDisk(pos))
 410             {
 411                 pcursor->close();
 412                 return false;
 413             }
 414         }
 415     }
 416
 417     pcursor->close();
 418     return true;
 419 }
 420
 421 bool CTxDB::ReadDiskTx(uint256 hash, CTransaction& tx, CTxIndex& txindex)
 422 {
 423     assert(!fClient);
 424     tx.SetNull();
 425     if (!ReadTxIndex(hash, txindex))
 426         return false;
 427     return (tx.ReadFromDisk(txindex.pos));
 428 }
 429
 430 bool CTxDB::ReadDiskTx(uint256 hash, CTransaction& tx)
 431 {
 432     CTxIndex txindex;
 433     return ReadDiskTx(hash, tx, txindex);
 434 }
 435
 436 bool CTxDB::ReadDiskTx(COutPoint outpoint, CTransaction& tx, CTxIndex& txindex)
 437 {
 438     return ReadDiskTx(outpoint.hash, tx, txindex);
 439 }
 440
 441 bool CTxDB::ReadDiskTx(COutPoint outpoint, CTransaction& tx)
 442 {
 443     CTxIndex txindex;
 444     return ReadDiskTx(outpoint.hash, tx, txindex);
 445 }
 446
 447 bool CTxDB::WriteBlockIndex(const CDiskBlockIndex& blockindex)
 448 {
 449     return Write(make_pair(string("blockindex"), blockindex.GetBlockHash()), blockindex);
 450 }
 451
 452 bool CTxDB::EraseBlockIndex(uint256 hash)
 453 {
 454     return Erase(make_pair(string("blockindex"), hash));
 455 }
 456
 457 bool CTxDB::ReadHashBestChain(uint256& hashBestChain)
 458 {
 459     return Read(string("hashBestChain"), hashBestChain);
 460 }
 461
 462 bool CTxDB::WriteHashBestChain(uint256 hashBestChain)
 463 {
 464     return Write(string("hashBestChain"), hashBestChain);
 465 }
 466
 467 bool CTxDB::ReadBestInvalidWork(CBigNum& bnBestInvalidWork)
 468 {
 469     return Read(string("bnBestInvalidWork"), bnBestInvalidWork);
 470 }
 471
 472 bool CTxDB::WriteBestInvalidWork(CBigNum bnBestInvalidWork)
 473 {
 474     return Write(string("bnBestInvalidWork"), bnBestInvalidWork);
 475 }
 476
 477 CBlockIndex static * InsertBlockIndex(uint256 hash)
 478 {
 479     if (hash == 0)
 480         return NULL;
 481
 482     // Return existing
 483     map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.find(hash);
 484     if (mi != mapBlockIndex.end())
 485         return (*mi).second;
 486
 487     // Create new
 488     CBlockIndex* pindexNew = new CBlockIndex();
 489     if (!pindexNew)
 490         throw runtime_error("LoadBlockIndex() : new CBlockIndex failed");
 491     mi = mapBlockIndex.insert(make_pair(hash, pindexNew)).first;
 492     pindexNew->phashBlock = &((*mi).first);
 493
 494     return pindexNew;
 495 }
 496
 497 bool CTxDB::LoadBlockIndex()
 498 {
 499     // Get database cursor
 500     Dbc* pcursor = GetCursor();
 501     if (!pcursor)
 502         return false;
 503
 504     // Load mapBlockIndex
 505     unsigned int fFlags = DB_SET_RANGE;
 506     loop
 507     {
 508         // Read next record
 509         CDataStream ssKey;
 510         if (fFlags == DB_SET_RANGE)
 511             ssKey << make_pair(string("blockindex"), uint256(0));
 512         CDataStream ssValue;
 513         int ret = ReadAtCursor(pcursor, ssKey, ssValue, fFlags);
 514         fFlags = DB_NEXT;
 515         if (ret == DB_NOTFOUND)
 516             break;
 517         else if (ret != 0)
 518             return false;
 519
 520         // Unserialize
 521
 522         try {
 523         string strType;
 524         ssKey >> strType;
 525         if (strType == "blockindex")
 526         {
 527             CDiskBlockIndex diskindex;
 528             ssValue >> diskindex;
 529
 530             // Construct block index object
 531             CBlockIndex* pindexNew = InsertBlockIndex(diskindex.GetBlockHash());
 532             pindexNew->pprev          = InsertBlockIndex(diskindex.hashPrev);
 533             pindexNew->pnext          = InsertBlockIndex(diskindex.hashNext);
 534             pindexNew->nFile          = diskindex.nFile;
 535             pindexNew->nBlockPos      = diskindex.nBlockPos;
 536             pindexNew->nHeight        = diskindex.nHeight;
 537             pindexNew->nVersion       = diskindex.nVersion;
 538             pindexNew->hashMerkleRoot = diskindex.hashMerkleRoot;
 539             pindexNew->nTime          = diskindex.nTime;
 540             pindexNew->nBits          = diskindex.nBits;
 541             pindexNew->nNonce         = diskindex.nNonce;
 542
 543             // Watch for genesis block
 544             if (pindexGenesisBlock == NULL && diskindex.GetBlockHash() == hashGenesisBlock)
 545                 pindexGenesisBlock = pindexNew;
 546
 547             if (!pindexNew->CheckIndex())
 548                 return error("LoadBlockIndex() : CheckIndex failed at %d", pindexNew->nHeight);
 549         }
 550         else
 551         {
 552             break;
 553         }
 554         }    // try
 555         catch (std::exception &e) {
 556             return error("%s() : deserialize error", __PRETTY_FUNCTION__);
 557         }
 558     }
 559     pcursor->close();
 560
 561     // Calculate bnChainWork
 562     vector<pair<int, CBlockIndex*> > vSortedByHeight;
 563     vSortedByHeight.reserve(mapBlockIndex.size());
 564     BOOST_FOREACH(const PAIRTYPE(uint256, CBlockIndex*)& item, mapBlockIndex)
 565     {
 566         CBlockIndex* pindex = item.second;
 567         vSortedByHeight.push_back(make_pair(pindex->nHeight, pindex));
 568     }
 569     sort(vSortedByHeight.begin(), vSortedByHeight.end());
 570     BOOST_FOREACH(const PAIRTYPE(int, CBlockIndex*)& item, vSortedByHeight)
 571     {
 572         CBlockIndex* pindex = item.second;
 573         pindex->bnChainWork = (pindex->pprev ? pindex->pprev->bnChainWork : 0) + pindex->GetBlockWork();
 574     }
 575
 576     // Load hashBestChain pointer to end of best chain
 577     if (!ReadHashBestChain(hashBestChain))
 578     {
 579         if (pindexGenesisBlock == NULL)
 580             return true;
 581         return error("CTxDB::LoadBlockIndex() : hashBestChain not loaded");
 582     }
 583     if (!mapBlockIndex.count(hashBestChain))
 584         return error("CTxDB::LoadBlockIndex() : hashBestChain not found in the block index");
 585     pindexBest = mapBlockIndex[hashBestChain];
 586     nBestHeight = pindexBest->nHeight;
 587     bnBestChainWork = pindexBest->bnChainWork;
 588     printf("LoadBlockIndex(): hashBestChain=%s  height=%d\n", hashBestChain.ToString().substr(0,20).c_str(), nBestHeight);
 589
 590     // Load bnBestInvalidWork, OK if it doesn't exist
 591     ReadBestInvalidWork(bnBestInvalidWork);
 592
 593     // Verify blocks in the best chain
 594     CBlockIndex* pindexFork = NULL;
 595     for (CBlockIndex* pindex = pindexBest; pindex && pindex->pprev; pindex = pindex->pprev)
 596     {
 597         if (pindex->nHeight < nBestHeight-2500 && !mapArgs.count("-checkblocks"))
 598             break;
 599         CBlock block;
 600         if (!block.ReadFromDisk(pindex))
 601             return error("LoadBlockIndex() : block.ReadFromDisk failed");
 602         if (!block.CheckBlock())
 603         {
 604             printf("LoadBlockIndex() : *** found bad block at %d, hash=%s\n", pindex->nHeight, pindex->GetBlockHash().ToString().c_str());
 605             pindexFork = pindex->pprev;
 606         }
 607     }
 608     if (pindexFork)
 609     {
 610         // Reorg back to the fork
 611         printf("LoadBlockIndex() : *** moving best chain pointer back to block %d\n", pindexFork->nHeight);
 612         CBlock block;
 613         if (!block.ReadFromDisk(pindexFork))
 614             return error("LoadBlockIndex() : block.ReadFromDisk failed");
 615         CTxDB txdb;
 616         block.SetBestChain(txdb, pindexFork);
 617     }
 618
 619     return true;
 620 }
 621
 622
 623
 624
 625
 626 //
 627 // CAddrDB
 628 //
 629
 630 bool CAddrDB::WriteAddress(const CAddress& addr)
 631 {
 632     return Write(make_pair(string("addr"), addr.GetKey()), addr);
 633 }
 634
 635 bool CAddrDB::EraseAddress(const CAddress& addr)
 636 {
 637     return Erase(make_pair(string("addr"), addr.GetKey()));
 638 }
 639
 640 bool CAddrDB::LoadAddresses()
 641 {
 642     CRITICAL_BLOCK(cs_mapAddresses)
 643     {
 644         // Load user provided addresses
 645         CAutoFile filein = fopen((GetDataDir() + "/addr.txt").c_str(), "rt");
 646         if (filein)
 647         {
 648             try
 649             {
 650                 char psz[1000];
 651                 while (fgets(psz, sizeof(psz), filein))
 652                 {
 653                     CAddress addr(psz, false, NODE_NETWORK);
 654                     addr.nTime = 0; // so it won't relay unless successfully connected
 655                     if (addr.IsValid())
 656                         AddAddress(addr);
 657                 }
 658             }
 659             catch (...) { }
 660         }
 661
 662         // Get cursor
 663         Dbc* pcursor = GetCursor();
 664         if (!pcursor)
 665             return false;
 666
 667         loop
 668         {
 669             // Read next record
 670             CDataStream ssKey;
 671             CDataStream ssValue;
 672             int ret = ReadAtCursor(pcursor, ssKey, ssValue);
 673             if (ret == DB_NOTFOUND)
 674                 break;
 675             else if (ret != 0)
 676                 return false;
 677
 678             // Unserialize
 679             string strType;
 680             ssKey >> strType;
 681             if (strType == "addr")
 682             {
 683                 CAddress addr;
 684                 ssValue >> addr;
 685                 mapAddresses.insert(make_pair(addr.GetKey(), addr));
 686             }
 687         }
 688         pcursor->close();
 689
 690         printf("Loaded %d addresses\n", mapAddresses.size());
 691     }
 692
 693     return true;
 694 }
 695
 696 bool LoadAddresses()
 697 {
 698     return CAddrDB("cr+").LoadAddresses();
 699 }
 700
 701
 702
 703
 704 //
 705 // CWalletDB
 706 //
 707
 708 bool CWalletDB::WriteName(const string& strAddress, const string& strName)
 709 {
 710     nWalletDBUpdated++;
 711     return Write(make_pair(string("name"), strAddress), strName);
 712 }
 713
 714 bool CWalletDB::EraseName(const string& strAddress)
 715 {
 716     // This should only be used for sending addresses, never for receiving addresses,
 717     // receiving addresses must always have an address book entry if they're not change return.
 718     nWalletDBUpdated++;
 719     return Erase(make_pair(string("name"), strAddress));
 720 }
 721
 722 bool CWalletDB::ReadAccount(const string& strAccount, CAccount& account)
 723 {
 724     account.SetNull();
 725     return Read(make_pair(string("acc"), strAccount), account);
 726 }
 727
 728 bool CWalletDB::WriteAccount(const string& strAccount, const CAccount& account)
 729 {
 730     return Write(make_pair(string("acc"), strAccount), account);
 731 }
 732
 733 bool CWalletDB::WriteAccountingEntry(const CAccountingEntry& acentry)
 734 {
 735     return Write(boost::make_tuple(string("acentry"), acentry.strAccount, ++nAccountingEntryNumber), acentry);
 736 }
 737
 738 int64 CWalletDB::GetAccountCreditDebit(const string& strAccount)
 739 {
 740     list<CAccountingEntry> entries;
 741     ListAccountCreditDebit(strAccount, entries);
 742
 743     int64 nCreditDebit = 0;
 744     BOOST_FOREACH (const CAccountingEntry& entry, entries)
 745         nCreditDebit += entry.nCreditDebit;
 746
 747     return nCreditDebit;
 748 }
 749
 750 void CWalletDB::ListAccountCreditDebit(const string& strAccount, list<CAccountingEntry>& entries)
 751 {
 752     bool fAllAccounts = (strAccount == "*");
 753
 754     Dbc* pcursor = GetCursor();
 755     if (!pcursor)
 756         throw runtime_error("CWalletDB::ListAccountCreditDebit() : cannot create DB cursor");
 757     unsigned int fFlags = DB_SET_RANGE;
 758     loop
 759     {
 760         // Read next record
 761         CDataStream ssKey;
 762         if (fFlags == DB_SET_RANGE)
 763             ssKey << boost::make_tuple(string("acentry"), (fAllAccounts? string("") : strAccount), uint64(0));
 764         CDataStream ssValue;
 765         int ret = ReadAtCursor(pcursor, ssKey, ssValue, fFlags);
 766         fFlags = DB_NEXT;
 767         if (ret == DB_NOTFOUND)
 768             break;
 769         else if (ret != 0)
 770         {
 771             pcursor->close();
 772             throw runtime_error("CWalletDB::ListAccountCreditDebit() : error scanning DB");
 773         }
 774
 775         // Unserialize
 776         string strType;
 777         ssKey >> strType;
 778         if (strType != "acentry")
 779             break;
 780         CAccountingEntry acentry;
 781         ssKey >> acentry.strAccount;
 782         if (!fAllAccounts && acentry.strAccount != strAccount)
 783             break;
 784
 785         ssValue >> acentry;
 786         entries.push_back(acentry);
 787     }
 788
 789     pcursor->close();
 790 }
 791
 792
 793 int CWalletDB::LoadWallet(CWallet* pwallet)
 794 {
 795     pwallet->vchDefaultKey.clear();
 796     int nFileVersion = 0;
 797     vector<uint256> vWalletUpgrade;
 798     bool fIsEncrypted = false;
 799
 800     // Modify defaults
 801 #ifndef __WXMSW__
 802     // Tray icon sometimes disappears on 9.10 karmic koala 64-bit, leaving no way to access the program
 803     fMinimizeToTray = false;
 804     fMinimizeOnClose = false;
 805 #endif
 806
 807     //// todo: shouldn't we catch exceptions and try to recover and continue?
 808     CRITICAL_BLOCK(pwallet->cs_wallet)
 809     {
 810         int nMinVersion = 0;
 811         if (Read((string)"minversion", nMinVersion))
 812         {
 813             if (nMinVersion > VERSION)
 814                 return DB_TOO_NEW;
 815         }
 816
 817         // Get cursor
 818         Dbc* pcursor = GetCursor();
 819         if (!pcursor)
 820         {
 821             printf("Error getting wallet database cursor\n");
 822             return DB_CORRUPT;
 823         }
 824
 825         loop
 826         {
 827             // Read next record
 828             CDataStream ssKey;
 829             CDataStream ssValue;
 830             int ret = ReadAtCursor(pcursor, ssKey, ssValue);
 831             if (ret == DB_NOTFOUND)
 832                 break;
 833             else if (ret != 0)
 834             {
 835                 printf("Error reading next record from wallet database\n");
 836                 return DB_CORRUPT;
 837             }
 838
 839             // Unserialize
 840             // Taking advantage of the fact that pair serialization
 841             // is just the two items serialized one after the other
 842             string strType;
 843             ssKey >> strType;
 844             if (strType == "name")
 845             {
 846                 string strAddress;
 847                 ssKey >> strAddress;
 848                 ssValue >> pwallet->mapAddressBook[strAddress];
 849             }
 850             else if (strType == "tx")
 851             {
 852                 uint256 hash;
 853                 ssKey >> hash;
 854                 CWalletTx& wtx = pwallet->mapWallet[hash];
 855                 ssValue >> wtx;
 856                 wtx.pwallet = pwallet;
 857
 858                 if (wtx.GetHash() != hash)
 859                     printf("Error in wallet.dat, hash mismatch\n");
 860
 861                 // Undo serialize changes in 31600
 862                 if (31404 <= wtx.fTimeReceivedIsTxTime && wtx.fTimeReceivedIsTxTime <= 31703)
 863                 {
 864                     if (!ssValue.empty())
 865                     {
 866                         char fTmp;
 867                         char fUnused;
 868                         ssValue >> fTmp >> fUnused >> wtx.strFromAccount;
 869                         printf("LoadWallet() upgrading tx ver=%d %d '%s' %s\n", wtx.fTimeReceivedIsTxTime, fTmp, wtx.strFromAccount.c_str(), hash.ToString().c_str());
 870                         wtx.fTimeReceivedIsTxTime = fTmp;
 871                     }
 872                     else
 873                     {
 874                         printf("LoadWallet() repairing tx ver=%d %s\n", wtx.fTimeReceivedIsTxTime, hash.ToString().c_str());
 875                         wtx.fTimeReceivedIsTxTime = 0;
 876                     }
 877                     vWalletUpgrade.push_back(hash);
 878                 }
 879
 880                 //// debug print
 881                 //printf("LoadWallet  %s\n", wtx.GetHash().ToString().c_str());
 882                 //printf(" %12"PRI64d"  %s  %s  %s\n",
 883                 //    wtx.vout[0].nValue,
 884                 //    DateTimeStrFormat("%x %H:%M:%S", wtx.GetBlockTime()).c_str(),
 885                 //    wtx.hashBlock.ToString().substr(0,20).c_str(),
 886                 //    wtx.mapValue["message"].c_str());
 887             }
 888             else if (strType == "acentry")
 889             {
 890                 string strAccount;
 891                 ssKey >> strAccount;
 892                 uint64 nNumber;
 893                 ssKey >> nNumber;
 894                 if (nNumber > nAccountingEntryNumber)
 895                     nAccountingEntryNumber = nNumber;
 896             }
 897             else if (strType == "key" || strType == "wkey")
 898             {
 899                 vector<unsigned char> vchPubKey;
 900                 ssKey >> vchPubKey;
 901                 CKey key;
 902                 if (strType == "key")
 903                 {
 904                     CPrivKey pkey;
 905                     ssValue >> pkey;
 906                     key.SetPrivKey(pkey);
 907                     if (key.GetPubKey() != vchPubKey)
 908                     {
 909                         printf("Error reading wallet database: CPrivKey pubkey inconsistency\n");
 910                         return DB_CORRUPT;
 911                     }
 912                     if (!key.IsValid())
 913                     {
 914                         printf("Error reading wallet database: invalid CPrivKey\n");
 915                         return DB_CORRUPT;
 916                     }
 917                 }
 918                 else
 919                 {
 920                     CWalletKey wkey;
 921                     ssValue >> wkey;
 922                     key.SetPrivKey(wkey.vchPrivKey);
 923                     if (key.GetPubKey() != vchPubKey)
 924                     {
 925                         printf("Error reading wallet database: CWalletKey pubkey inconsistency\n");
 926                         return DB_CORRUPT;
 927                     }
 928                     if (!key.IsValid())
 929                     {
 930                         printf("Error reading wallet database: invalid CWalletKey\n");
 931                         return DB_CORRUPT;
 932                     }
 933                 }
 934                 if (!pwallet->LoadKey(key))
 935                 {
 936                     printf("Error reading wallet database: LoadKey failed\n");
 937                     return DB_CORRUPT;
 938                 }
 939             }
 940             else if (strType == "mkey")
 941             {
 942                 unsigned int nID;
 943                 ssKey >> nID;
 944                 CMasterKey kMasterKey;
 945                 ssValue >> kMasterKey;
 946                 if(pwallet->mapMasterKeys.count(nID) != 0)
 947                 {
 948                     printf("Error reading wallet database: duplicate CMasterKey id %u\n", nID);
 949                     return DB_CORRUPT;
 950                 }
 951                 pwallet->mapMasterKeys[nID] = kMasterKey;
 952                 if (pwallet->nMasterKeyMaxID < nID)
 953                     pwallet->nMasterKeyMaxID = nID;
 954             }
 955             else if (strType == "ckey")
 956             {
 957                 vector<unsigned char> vchPubKey;
 958                 ssKey >> vchPubKey;
 959                 vector<unsigned char> vchPrivKey;
 960                 ssValue >> vchPrivKey;
 961                 if (!pwallet->LoadCryptedKey(vchPubKey, vchPrivKey))
 962                 {
 963                     printf("Error reading wallet database: LoadCryptedKey failed\n");
 964                     return DB_CORRUPT;
 965                 }
 966                 fIsEncrypted = true;
 967             }
 968             else if (strType == "defaultkey")
 969             {
 970                 ssValue >> pwallet->vchDefaultKey;
 971             }
 972             else if (strType == "pool")
 973             {
 974                 int64 nIndex;
 975                 ssKey >> nIndex;
 976                 pwallet->setKeyPool.insert(nIndex);
 977             }
 978             else if (strType == "version")
 979             {
 980                 ssValue >> nFileVersion;
 981                 if (nFileVersion == 10300)
 982                     nFileVersion = 300;
 983             }
 984             else if (strType == "setting")
 985             {
 986                 string strKey;
 987                 ssKey >> strKey;
 988
 989                 // Options
 990 #ifndef GUI
 991                 if (strKey == "fGenerateBitcoins")  ssValue >> fGenerateBitcoins;
 992 #endif
 993                 if (strKey == "nTransactionFee")    ssValue >> nTransactionFee;
 994                 if (strKey == "fLimitProcessors")   ssValue >> fLimitProcessors;
 995                 if (strKey == "nLimitProcessors")   ssValue >> nLimitProcessors;
 996                 if (strKey == "fMinimizeToTray")    ssValue >> fMinimizeToTray;
 997                 if (strKey == "fMinimizeOnClose")   ssValue >> fMinimizeOnClose;
 998                 if (strKey == "fUseProxy")          ssValue >> fUseProxy;
 999                 if (strKey == "addrProxy")          ssValue >> addrProxy;
1000                 if (fHaveUPnP && strKey == "fUseUPnP")           ssValue >> fUseUPnP;
1001             }
1002         }
1003         pcursor->close();
1004     }
1005
1006     BOOST_FOREACH(uint256 hash, vWalletUpgrade)
1007         WriteTx(hash, pwallet->mapWallet[hash]);
1008
1009     printf("nFileVersion = %d\n", nFileVersion);
1010     printf("fGenerateBitcoins = %d\n", fGenerateBitcoins);
1011     printf("nTransactionFee = %"PRI64d"\n", nTransactionFee);
1012     printf("fMinimizeToTray = %d\n", fMinimizeToTray);
1013     printf("fMinimizeOnClose = %d\n", fMinimizeOnClose);
1014     printf("fUseProxy = %d\n", fUseProxy);
1015     printf("addrProxy = %s\n", addrProxy.ToString().c_str());
1016     if (fHaveUPnP)
1017         printf("fUseUPnP = %d\n", fUseUPnP);
1018
1019
1020     // Rewrite encrypted wallets of versions 0.4.0 and 0.5.0rc:
1021     if (fIsEncrypted && (nFileVersion == 40000 || nFileVersion == 50000))
1022         return DB_NEED_REWRITE;
1023
1024     if (nFileVersion < VERSION) // Update
1025     {
1026         // Get rid of old debug.log file in current directory
1027         if (nFileVersion <= 105 && !pszSetDataDir[0])
1028             unlink("debug.log");
1029
1030         WriteVersion(VERSION);
1031     }
1032
1033     return DB_LOAD_OK;
1034 }
1035
1036 void ThreadFlushWalletDB(void* parg)
1037 {
1038     const string& strFile = ((const string*)parg)[0];
1039     static bool fOneThread;
1040     if (fOneThread)
1041         return;
1042     fOneThread = true;
1043     if (mapArgs.count("-noflushwallet"))
1044         return;
1045
1046     unsigned int nLastSeen = nWalletDBUpdated;
1047     unsigned int nLastFlushed = nWalletDBUpdated;
1048     int64 nLastWalletUpdate = GetTime();
1049     while (!fShutdown)
1050     {
1051         Sleep(500);
1052
1053         if (nLastSeen != nWalletDBUpdated)
1054         {
1055             nLastSeen = nWalletDBUpdated;
1056             nLastWalletUpdate = GetTime();
1057         }
1058
1059         if (nLastFlushed != nWalletDBUpdated && GetTime() - nLastWalletUpdate >= 2)
1060         {
1061             TRY_CRITICAL_BLOCK(cs_db)
1062             {
1063                 // Don't do this if any databases are in use
1064                 int nRefCount = 0;
1065                 map<string, int>::iterator mi = mapFileUseCount.begin();
1066                 while (mi != mapFileUseCount.end())
1067                 {
1068                     nRefCount += (*mi).second;
1069                     mi++;
1070                 }
1071
1072                 if (nRefCount == 0 && !fShutdown)
1073                 {
1074                     map<string, int>::iterator mi = mapFileUseCount.find(strFile);
1075                     if (mi != mapFileUseCount.end())
1076                     {
1077                         printf("%s ", DateTimeStrFormat("%x %H:%M:%S", GetTime()).c_str());
1078                         printf("Flushing wallet.dat\n");
1079                         nLastFlushed = nWalletDBUpdated;
1080                         int64 nStart = GetTimeMillis();
1081
1082                         // Flush wallet.dat so it's self contained
1083                         CloseDb(strFile);
1084                         dbenv.txn_checkpoint(0, 0, 0);
1085                         dbenv.lsn_reset(strFile.c_str(), 0);
1086
1087                         mapFileUseCount.erase(mi++);
1088                         printf("Flushed wallet.dat %"PRI64d"ms\n", GetTimeMillis() - nStart);
1089                     }
1090                 }
1091             }
1092         }
1093     }
1094 }
1095
1096 bool BackupWallet(const CWallet& wallet, const string& strDest)
1097 {
1098     if (!wallet.fFileBacked)
1099         return false;
1100     while (!fShutdown)
1101     {
1102         CRITICAL_BLOCK(cs_db)
1103         {
1104             if (!mapFileUseCount.count(wallet.strWalletFile) || mapFileUseCount[wallet.strWalletFile] == 0)
1105             {
1106                 // Flush log data to the dat file
1107                 CloseDb(wallet.strWalletFile);
1108                 dbenv.txn_checkpoint(0, 0, 0);
1109                 dbenv.lsn_reset(wallet.strWalletFile.c_str(), 0);
1110                 mapFileUseCount.erase(wallet.strWalletFile);
1111
1112                 // Copy wallet.dat
1113                 filesystem::path pathSrc(GetDataDir() + "/" + wallet.strWalletFile);
1114                 filesystem::path pathDest(strDest);
1115                 if (filesystem::is_directory(pathDest))
1116                     pathDest = pathDest / wallet.strWalletFile;
1117 #if BOOST_VERSION >= 104000
1118                 filesystem::copy_file(pathSrc, pathDest, filesystem::copy_option::overwrite_if_exists);
1119 #else
1120                 filesystem::copy_file(pathSrc, pathDest);
1121 #endif
1122                 printf("copied wallet.dat to %s\n", pathDest.string().c_str());
1123
1124                 return true;
1125             }
1126         }
1127         Sleep(100);
1128     }
1129     return false;
1130 }