src/db.cpp

   1 // Copyright (c) 2009-2010 Satoshi Nakamoto
   2 // Copyright (c) 2011 The Bitcoin developers
   3 // Copyright (c) 2011-2012 The PPCoin developers
   4 // Distributed under the MIT/X11 software license, see the accompanying
   5 // file license.txt or http://www.opensource.org/licenses/mit-license.php.
   6
   7 #include "headers.h"
   8 #include "db.h"
   9 #include "net.h"
  10 #include "checkpoints.h"
  11 #include <boost/filesystem.hpp>
  12 #include <boost/filesystem/fstream.hpp>
  13
  14 using namespace std;
  15 using namespace boost;
  16
  17
  18 unsigned int nWalletDBUpdated;
  19 uint64 nAccountingEntryNumber = 0;
  20
  21
  22
  23 //
  24 // CDB
  25 //
  26
  27 static CCriticalSection cs_db;
  28 static bool fDbEnvInit = false;
  29 DbEnv dbenv(0);
  30 static map<string, int> mapFileUseCount;
  31 static map<string, Db*> mapDb;
  32
  33 static void EnvShutdown()
  34 {
  35     if (!fDbEnvInit)
  36         return;
  37
  38     fDbEnvInit = false;
  39     try
  40     {
  41         dbenv.close(0);
  42     }
  43     catch (const DbException& e)
  44     {
  45         printf("EnvShutdown exception: %s (%d)\n", e.what(), e.get_errno());
  46     }
  47     DbEnv(0).remove(GetDataDir().c_str(), 0);
  48 }
  49
  50 class CDBInit
  51 {
  52 public:
  53     CDBInit()
  54     {
  55     }
  56     ~CDBInit()
  57     {
  58         EnvShutdown();
  59     }
  60 }
  61 instance_of_cdbinit;
  62
  63
  64 CDB::CDB(const char* pszFile, const char* pszMode) : pdb(NULL)
  65 {
  66     int ret;
  67     if (pszFile == NULL)
  68         return;
  69
  70     fReadOnly = (!strchr(pszMode, '+') && !strchr(pszMode, 'w'));
  71     bool fCreate = strchr(pszMode, 'c');
  72     unsigned int nFlags = DB_THREAD;
  73     if (fCreate)
  74         nFlags |= DB_CREATE;
  75
  76     CRITICAL_BLOCK(cs_db)
  77     {
  78         if (!fDbEnvInit)
  79         {
  80             if (fShutdown)
  81                 return;
  82             string strDataDir = GetDataDir();
  83             string strLogDir = strDataDir + "/database";
  84             filesystem::create_directory(strLogDir.c_str());
  85             string strErrorFile = strDataDir + "/db.log";
  86             printf("dbenv.open strLogDir=%s strErrorFile=%s\n", strLogDir.c_str(), strErrorFile.c_str());
  87
  88             dbenv.set_lg_dir(strLogDir.c_str());
  89             dbenv.set_lg_max(10000000);
  90             dbenv.set_lk_max_locks(10000);
  91             dbenv.set_lk_max_objects(10000);
  92             dbenv.set_errfile(fopen(strErrorFile.c_str(), "a")); /// debug
  93             dbenv.set_flags(DB_AUTO_COMMIT, 1);
  94             ret = dbenv.open(strDataDir.c_str(),
  95                              DB_CREATE     |
  96                              DB_INIT_LOCK  |
  97                              DB_INIT_LOG   |
  98                              DB_INIT_MPOOL |
  99                              DB_INIT_TXN   |
 100                              DB_THREAD     |
 101                              DB_RECOVER,
 102                              S_IRUSR | S_IWUSR);
 103             if (ret > 0)
 104                 throw runtime_error(strprintf("CDB() : error %d opening database environment", ret));
 105             fDbEnvInit = true;
 106         }
 107
 108         strFile = pszFile;
 109         ++mapFileUseCount[strFile];
 110         pdb = mapDb[strFile];
 111         if (pdb == NULL)
 112         {
 113             pdb = new Db(&dbenv, 0);
 114
 115             ret = pdb->open(NULL,      // Txn pointer
 116                             pszFile,   // Filename
 117                             "main",    // Logical db name
 118                             DB_BTREE,  // Database type
 119                             nFlags,    // Flags
 120                             0);
 121
 122             if (ret > 0)
 123             {
 124                 delete pdb;
 125                 pdb = NULL;
 126                 CRITICAL_BLOCK(cs_db)
 127                     --mapFileUseCount[strFile];
 128                 strFile = "";
 129                 throw runtime_error(strprintf("CDB() : can't open database file %s, error %d", pszFile, ret));
 130             }
 131
 132             if (fCreate && !Exists(string("version")))
 133             {
 134                 bool fTmp = fReadOnly;
 135                 fReadOnly = false;
 136                 WriteVersion(VERSION);
 137                 fReadOnly = fTmp;
 138             }
 139
 140             mapDb[strFile] = pdb;
 141         }
 142     }
 143 }
 144
 145 void CDB::Close()
 146 {
 147     if (!pdb)
 148         return;
 149     if (!vTxn.empty())
 150         vTxn.front()->abort();
 151     vTxn.clear();
 152     pdb = NULL;
 153
 154     // Flush database activity from memory pool to disk log
 155     unsigned int nMinutes = 0;
 156     if (fReadOnly)
 157         nMinutes = 1;
 158     if (strFile == "addr.dat")
 159         nMinutes = 2;
 160     if (strFile == "blkindex.dat" && IsInitialBlockDownload() && nBestHeight % 500 != 0)
 161         nMinutes = 1;
 162     dbenv.txn_checkpoint(0, nMinutes, 0);
 163
 164     CRITICAL_BLOCK(cs_db)
 165         --mapFileUseCount[strFile];
 166 }
 167
 168 void static CloseDb(const string& strFile)
 169 {
 170     CRITICAL_BLOCK(cs_db)
 171     {
 172         if (mapDb[strFile] != NULL)
 173         {
 174             // Close the database handle
 175             Db* pdb = mapDb[strFile];
 176             pdb->close(0);
 177             delete pdb;
 178             mapDb[strFile] = NULL;
 179         }
 180     }
 181 }
 182
 183 bool CDB::Rewrite(const string& strFile, const char* pszSkip)
 184 {
 185     while (!fShutdown)
 186     {
 187         CRITICAL_BLOCK(cs_db)
 188         {
 189             if (!mapFileUseCount.count(strFile) || mapFileUseCount[strFile] == 0)
 190             {
 191                 // Flush log data to the dat file
 192                 CloseDb(strFile);
 193                 dbenv.txn_checkpoint(0, 0, 0);
 194                 dbenv.lsn_reset(strFile.c_str(), 0);
 195                 mapFileUseCount.erase(strFile);
 196
 197                 bool fSuccess = true;
 198                 printf("Rewriting %s...\n", strFile.c_str());
 199                 string strFileRes = strFile + ".rewrite";
 200                 { // surround usage of db with extra {}
 201                     CDB db(strFile.c_str(), "r");
 202                     Db* pdbCopy = new Db(&dbenv, 0);
 203
 204                     int ret = pdbCopy->open(NULL,                 // Txn pointer
 205                                             strFileRes.c_str(),   // Filename
 206                                             "main",    // Logical db name
 207                                             DB_BTREE,  // Database type
 208                                             DB_CREATE,    // Flags
 209                                             0);
 210                     if (ret > 0)
 211                     {
 212                         printf("Cannot create database file %s\n", strFileRes.c_str());
 213                         fSuccess = false;
 214                     }
 215
 216                     Dbc* pcursor = db.GetCursor();
 217                     if (pcursor)
 218                         while (fSuccess)
 219                         {
 220                             CDataStream ssKey;
 221                             CDataStream ssValue;
 222                             int ret = db.ReadAtCursor(pcursor, ssKey, ssValue, DB_NEXT);
 223                             if (ret == DB_NOTFOUND)
 224                             {
 225                                 pcursor->close();
 226                                 break;
 227                             }
 228                             else if (ret != 0)
 229                             {
 230                                 pcursor->close();
 231                                 fSuccess = false;
 232                                 break;
 233                             }
 234                             if (pszSkip &&
 235                                 strncmp(&ssKey[0], pszSkip, std::min(ssKey.size(), strlen(pszSkip))) == 0)
 236                                 continue;
 237                             if (strncmp(&ssKey[0], "\x07version", 8) == 0)
 238                             {
 239                                 // Update version:
 240                                 ssValue.clear();
 241                                 ssValue << VERSION;
 242                             }
 243                             Dbt datKey(&ssKey[0], ssKey.size());
 244                             Dbt datValue(&ssValue[0], ssValue.size());
 245                             int ret2 = pdbCopy->put(NULL, &datKey, &datValue, DB_NOOVERWRITE);
 246                             if (ret2 > 0)
 247                                 fSuccess = false;
 248                         }
 249                     if (fSuccess)
 250                     {
 251                         db.Close();
 252                         CloseDb(strFile);
 253                         if (pdbCopy->close(0))
 254                             fSuccess = false;
 255                         delete pdbCopy;
 256                     }
 257                 }
 258                 if (fSuccess)
 259                 {
 260                     Db dbA(&dbenv, 0);
 261                     if (dbA.remove(strFile.c_str(), NULL, 0))
 262                         fSuccess = false;
 263                     Db dbB(&dbenv, 0);
 264                     if (dbB.rename(strFileRes.c_str(), NULL, strFile.c_str(), 0))
 265                         fSuccess = false;
 266                 }
 267                 if (!fSuccess)
 268                     printf("Rewriting of %s FAILED!\n", strFileRes.c_str());
 269                 return fSuccess;
 270             }
 271         }
 272         Sleep(100);
 273     }
 274     return false;
 275 }
 276
 277
 278 void DBFlush(bool fShutdown)
 279 {
 280     // Flush log data to the actual data file
 281     //  on all files that are not in use
 282     printf("DBFlush(%s)%s\n", fShutdown ? "true" : "false", fDbEnvInit ? "" : " db not started");
 283     if (!fDbEnvInit)
 284         return;
 285     CRITICAL_BLOCK(cs_db)
 286     {
 287         map<string, int>::iterator mi = mapFileUseCount.begin();
 288         while (mi != mapFileUseCount.end())
 289         {
 290             string strFile = (*mi).first;
 291             int nRefCount = (*mi).second;
 292             printf("%s refcount=%d\n", strFile.c_str(), nRefCount);
 293             if (nRefCount == 0)
 294             {
 295                 // Move log data to the dat file
 296                 CloseDb(strFile);
 297                 dbenv.txn_checkpoint(0, 0, 0);
 298                 printf("%s flush\n", strFile.c_str());
 299                 dbenv.lsn_reset(strFile.c_str(), 0);
 300                 mapFileUseCount.erase(mi++);
 301             }
 302             else
 303                 mi++;
 304         }
 305         if (fShutdown)
 306         {
 307             char** listp;
 308             if (mapFileUseCount.empty())
 309             {
 310                 dbenv.log_archive(&listp, DB_ARCH_REMOVE);
 311                 EnvShutdown();
 312             }
 313         }
 314     }
 315 }
 316
 317
 318
 319
 320
 321
 322 //
 323 // CTxDB
 324 //
 325
 326 bool CTxDB::ReadTxIndex(uint256 hash, CTxIndex& txindex)
 327 {
 328     assert(!fClient);
 329     txindex.SetNull();
 330     return Read(make_pair(string("tx"), hash), txindex);
 331 }
 332
 333 bool CTxDB::UpdateTxIndex(uint256 hash, const CTxIndex& txindex)
 334 {
 335     assert(!fClient);
 336     return Write(make_pair(string("tx"), hash), txindex);
 337 }
 338
 339 bool CTxDB::AddTxIndex(const CTransaction& tx, const CDiskTxPos& pos, int nHeight)
 340 {
 341     assert(!fClient);
 342
 343     // Add to tx index
 344     uint256 hash = tx.GetHash();
 345     CTxIndex txindex(pos, tx.vout.size());
 346     return Write(make_pair(string("tx"), hash), txindex);
 347 }
 348
 349 bool CTxDB::EraseTxIndex(const CTransaction& tx)
 350 {
 351     assert(!fClient);
 352     uint256 hash = tx.GetHash();
 353
 354     return Erase(make_pair(string("tx"), hash));
 355 }
 356
 357 bool CTxDB::ContainsTx(uint256 hash)
 358 {
 359     assert(!fClient);
 360     return Exists(make_pair(string("tx"), hash));
 361 }
 362
 363 bool CTxDB::ReadOwnerTxes(uint160 hash160, int nMinHeight, vector<CTransaction>& vtx)
 364 {
 365     assert(!fClient);
 366     vtx.clear();
 367
 368     // Get cursor
 369     Dbc* pcursor = GetCursor();
 370     if (!pcursor)
 371         return false;
 372
 373     unsigned int fFlags = DB_SET_RANGE;
 374     loop
 375     {
 376         // Read next record
 377         CDataStream ssKey;
 378         if (fFlags == DB_SET_RANGE)
 379             ssKey << string("owner") << hash160 << CDiskTxPos(0, 0, 0);
 380         CDataStream ssValue;
 381         int ret = ReadAtCursor(pcursor, ssKey, ssValue, fFlags);
 382         fFlags = DB_NEXT;
 383         if (ret == DB_NOTFOUND)
 384             break;
 385         else if (ret != 0)
 386         {
 387             pcursor->close();
 388             return false;
 389         }
 390
 391         // Unserialize
 392         string strType;
 393         uint160 hashItem;
 394         CDiskTxPos pos;
 395         ssKey >> strType >> hashItem >> pos;
 396         int nItemHeight;
 397         ssValue >> nItemHeight;
 398
 399         // Read transaction
 400         if (strType != "owner" || hashItem != hash160)
 401             break;
 402         if (nItemHeight >= nMinHeight)
 403         {
 404             vtx.resize(vtx.size()+1);
 405             if (!vtx.back().ReadFromDisk(pos))
 406             {
 407                 pcursor->close();
 408                 return false;
 409             }
 410         }
 411     }
 412
 413     pcursor->close();
 414     return true;
 415 }
 416
 417 bool CTxDB::ReadDiskTx(uint256 hash, CTransaction& tx, CTxIndex& txindex)
 418 {
 419     assert(!fClient);
 420     tx.SetNull();
 421     if (!ReadTxIndex(hash, txindex))
 422         return false;
 423     return (tx.ReadFromDisk(txindex.pos));
 424 }
 425
 426 bool CTxDB::ReadDiskTx(uint256 hash, CTransaction& tx)
 427 {
 428     CTxIndex txindex;
 429     return ReadDiskTx(hash, tx, txindex);
 430 }
 431
 432 bool CTxDB::ReadDiskTx(COutPoint outpoint, CTransaction& tx, CTxIndex& txindex)
 433 {
 434     return ReadDiskTx(outpoint.hash, tx, txindex);
 435 }
 436
 437 bool CTxDB::ReadDiskTx(COutPoint outpoint, CTransaction& tx)
 438 {
 439     CTxIndex txindex;
 440     return ReadDiskTx(outpoint.hash, tx, txindex);
 441 }
 442
 443 bool CTxDB::WriteBlockIndex(const CDiskBlockIndex& blockindex)
 444 {
 445     return Write(make_pair(string("blockindex"), blockindex.GetBlockHash()), blockindex);
 446 }
 447
 448 bool CTxDB::EraseBlockIndex(uint256 hash)
 449 {
 450     return Erase(make_pair(string("blockindex"), hash));
 451 }
 452
 453 bool CTxDB::ReadHashBestChain(uint256& hashBestChain)
 454 {
 455     return Read(string("hashBestChain"), hashBestChain);
 456 }
 457
 458 bool CTxDB::WriteHashBestChain(uint256 hashBestChain)
 459 {
 460     return Write(string("hashBestChain"), hashBestChain);
 461 }
 462
 463 bool CTxDB::ReadBestInvalidTrust(uint64& nBestInvalidTrust)
 464 {
 465     return Read(string("nBestInvalidTrust"), nBestInvalidTrust);
 466 }
 467
 468 bool CTxDB::WriteBestInvalidTrust(uint64 nBestInvalidTrust)
 469 {
 470     return Write(string("nBestInvalidTrust"), nBestInvalidTrust);
 471 }
 472
 473 bool CTxDB::ReadAutoCheckpoint(int& nAutoCheckpoint)
 474 {
 475     return Read(string("nAutoCheckpoint"), nAutoCheckpoint);
 476 }
 477
 478 bool CTxDB::WriteAutoCheckpoint(int nCheckpoint, bool fReset)
 479 {
 480     nCheckpoint = fReset? nCheckpoint : max(Checkpoints::nAutoCheckpoint, nCheckpoint);
 481     return Write(string("nAutoCheckpoint"), nCheckpoint);
 482 }
 483
 484 CBlockIndex static * InsertBlockIndex(uint256 hash)
 485 {
 486     if (hash == 0)
 487         return NULL;
 488
 489     // Return existing
 490     map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.find(hash);
 491     if (mi != mapBlockIndex.end())
 492         return (*mi).second;
 493
 494     // Create new
 495     CBlockIndex* pindexNew = new CBlockIndex();
 496     if (!pindexNew)
 497         throw runtime_error("LoadBlockIndex() : new CBlockIndex failed");
 498     mi = mapBlockIndex.insert(make_pair(hash, pindexNew)).first;
 499     pindexNew->phashBlock = &((*mi).first);
 500
 501     return pindexNew;
 502 }
 503
 504 bool CTxDB::LoadBlockIndex()
 505 {
 506     // Get database cursor
 507     Dbc* pcursor = GetCursor();
 508     if (!pcursor)
 509         return false;
 510
 511     // Load mapBlockIndex
 512     unsigned int fFlags = DB_SET_RANGE;
 513     loop
 514     {
 515         // Read next record
 516         CDataStream ssKey;
 517         if (fFlags == DB_SET_RANGE)
 518             ssKey << make_pair(string("blockindex"), uint256(0));
 519         CDataStream ssValue;
 520         int ret = ReadAtCursor(pcursor, ssKey, ssValue, fFlags);
 521         fFlags = DB_NEXT;
 522         if (ret == DB_NOTFOUND)
 523             break;
 524         else if (ret != 0)
 525             return false;
 526
 527         // Unserialize
 528         string strType;
 529         ssKey >> strType;
 530         if (strType == "blockindex")
 531         {
 532             CDiskBlockIndex diskindex;
 533             ssValue >> diskindex;
 534
 535             // Construct block index object
 536             CBlockIndex* pindexNew = InsertBlockIndex(diskindex.GetBlockHash());
 537             pindexNew->pprev          = InsertBlockIndex(diskindex.hashPrev);
 538             pindexNew->pnext          = InsertBlockIndex(diskindex.hashNext);
 539             pindexNew->nFile          = diskindex.nFile;
 540             pindexNew->nBlockPos      = diskindex.nBlockPos;
 541             pindexNew->nChainTrust    = diskindex.nChainTrust;
 542             pindexNew->nHeight        = diskindex.nHeight;
 543             pindexNew->nCheckpoint    = diskindex.nCheckpoint;
 544             pindexNew->fProofOfStake  = diskindex.fProofOfStake;
 545             pindexNew->prevoutStake   = diskindex.prevoutStake;
 546             pindexNew->nVersion       = diskindex.nVersion;
 547             pindexNew->hashMerkleRoot = diskindex.hashMerkleRoot;
 548             pindexNew->nTime          = diskindex.nTime;
 549             pindexNew->nBits          = diskindex.nBits;
 550             pindexNew->nNonce         = diskindex.nNonce;
 551
 552             // Watch for genesis block
 553             if (pindexGenesisBlock == NULL && diskindex.GetBlockHash() == hashGenesisBlock)
 554                 pindexGenesisBlock = pindexNew;
 555
 556             if (!pindexNew->CheckIndex())
 557                 return error("LoadBlockIndex() : CheckIndex failed at %d", pindexNew->nHeight);
 558
 559             // ppcoin: build setStakeSeen
 560             if (pindexNew->fProofOfStake)
 561                 setStakeSeen.insert(pindexNew->prevoutStake);
 562         }
 563         else
 564         {
 565             break;
 566         }
 567     }
 568     pcursor->close();
 569
 570     // Load hashBestChain pointer to end of best chain
 571     if (!ReadHashBestChain(hashBestChain))
 572     {
 573         if (pindexGenesisBlock == NULL)
 574             return true;
 575         return error("CTxDB::LoadBlockIndex() : hashBestChain not loaded");
 576     }
 577     if (!mapBlockIndex.count(hashBestChain))
 578         return error("CTxDB::LoadBlockIndex() : hashBestChain not found in the block index");
 579     pindexBest = mapBlockIndex[hashBestChain];
 580     nBestHeight = pindexBest->nHeight;
 581     nBestChainTrust = pindexBest->nChainTrust;
 582     printf("LoadBlockIndex(): hashBestChain=%s  height=%d  trust=%d\n", hashBestChain.ToString().substr(0,20).c_str(), nBestHeight, nBestChainTrust);
 583
 584     // Load nAutoCheckpoint
 585     if (!ReadAutoCheckpoint(Checkpoints::nAutoCheckpoint))
 586         return error("CTxDB::LoadBlockIndex() : nAutoCheckpoint not loaded");
 587     printf("LoadBlockIndex(): automatic checkpoint at height=%d\n", Checkpoints::nAutoCheckpoint);
 588
 589     // Load nBestInvalidTrust, OK if it doesn't exist
 590     ReadBestInvalidTrust(nBestInvalidTrust);
 591
 592     // Verify blocks in the best chain
 593     CBlockIndex* pindexFork = NULL;
 594     for (CBlockIndex* pindex = pindexBest; pindex && pindex->pprev; pindex = pindex->pprev)
 595     {
 596         if (pindex->nHeight < nBestHeight-2500 && !mapArgs.count("-checkblocks"))
 597             break;
 598         CBlock block;
 599         if (!block.ReadFromDisk(pindex))
 600             return error("LoadBlockIndex() : block.ReadFromDisk failed");
 601         if (!block.CheckBlock())
 602         {
 603             printf("LoadBlockIndex() : *** found bad block at %d, hash=%s\n", pindex->nHeight, pindex->GetBlockHash().ToString().c_str());
 604             pindexFork = pindex->pprev;
 605         }
 606     }
 607     if (pindexFork)
 608     {
 609         // Reorg back to the fork
 610         printf("LoadBlockIndex() : *** moving best chain pointer back to block %d\n", pindexFork->nHeight);
 611         CBlock block;
 612         if (!block.ReadFromDisk(pindexFork))
 613             return error("LoadBlockIndex() : block.ReadFromDisk failed");
 614         CTxDB txdb;
 615         block.SetBestChain(txdb, pindexFork);
 616     }
 617
 618     return true;
 619 }
 620
 621
 622
 623
 624
 625 //
 626 // CAddrDB
 627 //
 628
 629 bool CAddrDB::WriteAddress(const CAddress& addr)
 630 {
 631     return Write(make_pair(string("addr"), addr.GetKey()), addr);
 632 }
 633
 634 bool CAddrDB::EraseAddress(const CAddress& addr)
 635 {
 636     return Erase(make_pair(string("addr"), addr.GetKey()));
 637 }
 638
 639 bool CAddrDB::LoadAddresses()
 640 {
 641     CRITICAL_BLOCK(cs_mapAddresses)
 642     {
 643         // Get cursor
 644         Dbc* pcursor = GetCursor();
 645         if (!pcursor)
 646             return false;
 647
 648         loop
 649         {
 650             // Read next record
 651             CDataStream ssKey;
 652             CDataStream ssValue;
 653             int ret = ReadAtCursor(pcursor, ssKey, ssValue);
 654             if (ret == DB_NOTFOUND)
 655                 break;
 656             else if (ret != 0)
 657                 return false;
 658
 659             // Unserialize
 660             string strType;
 661             ssKey >> strType;
 662             if (strType == "addr")
 663             {
 664                 CAddress addr;
 665                 ssValue >> addr;
 666                 mapAddresses.insert(make_pair(addr.GetKey(), addr));
 667             }
 668         }
 669         pcursor->close();
 670
 671         printf("Loaded %d addresses\n", mapAddresses.size());
 672     }
 673
 674     return true;
 675 }
 676
 677 bool LoadAddresses()
 678 {
 679     return CAddrDB("cr+").LoadAddresses();
 680 }
 681
 682
 683
 684
 685 //
 686 // CWalletDB
 687 //
 688
 689 bool CWalletDB::WriteName(const string& strAddress, const string& strName)
 690 {
 691     nWalletDBUpdated++;
 692     return Write(make_pair(string("name"), strAddress), strName);
 693 }
 694
 695 bool CWalletDB::EraseName(const string& strAddress)
 696 {
 697     // This should only be used for sending addresses, never for receiving addresses,
 698     // receiving addresses must always have an address book entry if they're not change return.
 699     nWalletDBUpdated++;
 700     return Erase(make_pair(string("name"), strAddress));
 701 }
 702
 703 bool CWalletDB::ReadAccount(const string& strAccount, CAccount& account)
 704 {
 705     account.SetNull();
 706     return Read(make_pair(string("acc"), strAccount), account);
 707 }
 708
 709 bool CWalletDB::WriteAccount(const string& strAccount, const CAccount& account)
 710 {
 711     return Write(make_pair(string("acc"), strAccount), account);
 712 }
 713
 714 bool CWalletDB::WriteAccountingEntry(const CAccountingEntry& acentry)
 715 {
 716     return Write(boost::make_tuple(string("acentry"), acentry.strAccount, ++nAccountingEntryNumber), acentry);
 717 }
 718
 719 int64 CWalletDB::GetAccountCreditDebit(const string& strAccount)
 720 {
 721     list<CAccountingEntry> entries;
 722     ListAccountCreditDebit(strAccount, entries);
 723
 724     int64 nCreditDebit = 0;
 725     BOOST_FOREACH (const CAccountingEntry& entry, entries)
 726         nCreditDebit += entry.nCreditDebit;
 727
 728     return nCreditDebit;
 729 }
 730
 731 void CWalletDB::ListAccountCreditDebit(const string& strAccount, list<CAccountingEntry>& entries)
 732 {
 733     bool fAllAccounts = (strAccount == "*");
 734
 735     Dbc* pcursor = GetCursor();
 736     if (!pcursor)
 737         throw runtime_error("CWalletDB::ListAccountCreditDebit() : cannot create DB cursor");
 738     unsigned int fFlags = DB_SET_RANGE;
 739     loop
 740     {
 741         // Read next record
 742         CDataStream ssKey;
 743         if (fFlags == DB_SET_RANGE)
 744             ssKey << boost::make_tuple(string("acentry"), (fAllAccounts? string("") : strAccount), uint64(0));
 745         CDataStream ssValue;
 746         int ret = ReadAtCursor(pcursor, ssKey, ssValue, fFlags);
 747         fFlags = DB_NEXT;
 748         if (ret == DB_NOTFOUND)
 749             break;
 750         else if (ret != 0)
 751         {
 752             pcursor->close();
 753             throw runtime_error("CWalletDB::ListAccountCreditDebit() : error scanning DB");
 754         }
 755
 756         // Unserialize
 757         string strType;
 758         ssKey >> strType;
 759         if (strType != "acentry")
 760             break;
 761         CAccountingEntry acentry;
 762         ssKey >> acentry.strAccount;
 763         if (!fAllAccounts && acentry.strAccount != strAccount)
 764             break;
 765
 766         ssValue >> acentry;
 767         entries.push_back(acentry);
 768     }
 769
 770     pcursor->close();
 771 }
 772
 773
 774 int CWalletDB::LoadWallet(CWallet* pwallet)
 775 {
 776     pwallet->vchDefaultKey.clear();
 777     int nFileVersion = 0;
 778     vector<uint256> vWalletUpgrade;
 779     bool fIsEncrypted = false;
 780
 781     // Modify defaults
 782 #ifndef WIN32
 783     // Tray icon sometimes disappears on 9.10 karmic koala 64-bit, leaving no way to access the program
 784     fMinimizeToTray = false;
 785     fMinimizeOnClose = false;
 786 #endif
 787
 788     //// todo: shouldn't we catch exceptions and try to recover and continue?
 789     CRITICAL_BLOCK(pwallet->cs_wallet)
 790     {
 791         // Get cursor
 792         Dbc* pcursor = GetCursor();
 793         if (!pcursor)
 794             return DB_CORRUPT;
 795
 796         loop
 797         {
 798             // Read next record
 799             CDataStream ssKey;
 800             CDataStream ssValue;
 801             int ret = ReadAtCursor(pcursor, ssKey, ssValue);
 802             if (ret == DB_NOTFOUND)
 803                 break;
 804             else if (ret != 0)
 805                 return DB_CORRUPT;
 806
 807             // Unserialize
 808             // Taking advantage of the fact that pair serialization
 809             // is just the two items serialized one after the other
 810             string strType;
 811             ssKey >> strType;
 812             if (strType == "name")
 813             {
 814                 string strAddress;
 815                 ssKey >> strAddress;
 816                 ssValue >> pwallet->mapAddressBook[strAddress];
 817             }
 818             else if (strType == "tx")
 819             {
 820                 uint256 hash;
 821                 ssKey >> hash;
 822                 CWalletTx& wtx = pwallet->mapWallet[hash];
 823                 ssValue >> wtx;
 824                 wtx.pwallet = pwallet;
 825
 826                 if (wtx.GetHash() != hash)
 827                     printf("Error in wallet.dat, hash mismatch\n");
 828
 829                 // Undo serialize changes in 31600
 830                 if (31404 <= wtx.fTimeReceivedIsTxTime && wtx.fTimeReceivedIsTxTime <= 31703)
 831                 {
 832                     if (!ssValue.empty())
 833                     {
 834                         char fTmp;
 835                         char fUnused;
 836                         ssValue >> fTmp >> fUnused >> wtx.strFromAccount;
 837                         printf("LoadWallet() upgrading tx ver=%d %d '%s' %s\n", wtx.fTimeReceivedIsTxTime, fTmp, wtx.strFromAccount.c_str(), hash.ToString().c_str());
 838                         wtx.fTimeReceivedIsTxTime = fTmp;
 839                     }
 840                     else
 841                     {
 842                         printf("LoadWallet() repairing tx ver=%d %s\n", wtx.fTimeReceivedIsTxTime, hash.ToString().c_str());
 843                         wtx.fTimeReceivedIsTxTime = 0;
 844                     }
 845                     vWalletUpgrade.push_back(hash);
 846                 }
 847
 848                 //// debug print
 849                 //printf("LoadWallet  %s\n", wtx.GetHash().ToString().c_str());
 850                 //printf(" %12I64d  %s  %s  %s\n",
 851                 //    wtx.vout[0].nValue,
 852                 //    DateTimeStrFormat("%x %H:%M:%S", wtx.GetBlockTime()).c_str(),
 853                 //    wtx.hashBlock.ToString().substr(0,20).c_str(),
 854                 //    wtx.mapValue["message"].c_str());
 855             }
 856             else if (strType == "acentry")
 857             {
 858                 string strAccount;
 859                 ssKey >> strAccount;
 860                 uint64 nNumber;
 861                 ssKey >> nNumber;
 862                 if (nNumber > nAccountingEntryNumber)
 863                     nAccountingEntryNumber = nNumber;
 864             }
 865             else if (strType == "key" || strType == "wkey")
 866             {
 867                 vector<unsigned char> vchPubKey;
 868                 ssKey >> vchPubKey;
 869                 CKey key;
 870                 if (strType == "key")
 871                 {
 872                     CPrivKey pkey;
 873                     ssValue >> pkey;
 874                     key.SetPrivKey(pkey);
 875                 }
 876                 else
 877                 {
 878                     CWalletKey wkey;
 879                     ssValue >> wkey;
 880                     key.SetPrivKey(wkey.vchPrivKey);
 881                 }
 882                 if (!pwallet->LoadKey(key))
 883                     return DB_CORRUPT;
 884             }
 885             else if (strType == "mkey")
 886             {
 887                 unsigned int nID;
 888                 ssKey >> nID;
 889                 CMasterKey kMasterKey;
 890                 ssValue >> kMasterKey;
 891                 if(pwallet->mapMasterKeys.count(nID) != 0)
 892                     return DB_CORRUPT;
 893                 pwallet->mapMasterKeys[nID] = kMasterKey;
 894                 if (pwallet->nMasterKeyMaxID < nID)
 895                     pwallet->nMasterKeyMaxID = nID;
 896             }
 897             else if (strType == "ckey")
 898             {
 899                 vector<unsigned char> vchPubKey;
 900                 ssKey >> vchPubKey;
 901                 vector<unsigned char> vchPrivKey;
 902                 ssValue >> vchPrivKey;
 903                 if (!pwallet->LoadCryptedKey(vchPubKey, vchPrivKey))
 904                     return DB_CORRUPT;
 905                 fIsEncrypted = true;
 906             }
 907             else if (strType == "defaultkey")
 908             {
 909                 ssValue >> pwallet->vchDefaultKey;
 910             }
 911             else if (strType == "pool")
 912             {
 913                 int64 nIndex;
 914                 ssKey >> nIndex;
 915                 pwallet->setKeyPool.insert(nIndex);
 916             }
 917             else if (strType == "version")
 918             {
 919                 ssValue >> nFileVersion;
 920                 if (nFileVersion == 10300)
 921                     nFileVersion = 300;
 922             }
 923             else if (strType == "setting")
 924             {
 925                 string strKey;
 926                 ssKey >> strKey;
 927
 928                 // Options
 929 #ifndef QT_GUI
 930                 if (strKey == "fGenerateBitcoins")  ssValue >> fGenerateBitcoins;
 931 #endif
 932                 if (strKey == "nTransactionFee")    ssValue >> nTransactionFee;
 933                 if (strKey == "fLimitProcessors")   ssValue >> fLimitProcessors;
 934                 if (strKey == "nLimitProcessors")   ssValue >> nLimitProcessors;
 935                 if (strKey == "fMinimizeToTray")    ssValue >> fMinimizeToTray;
 936                 if (strKey == "fMinimizeOnClose")   ssValue >> fMinimizeOnClose;
 937                 if (strKey == "fUseProxy")          ssValue >> fUseProxy;
 938                 if (strKey == "addrProxy")          ssValue >> addrProxy;
 939                 if (fHaveUPnP && strKey == "fUseUPnP")           ssValue >> fUseUPnP;
 940                 if (strKey == "nBalanceReserve")    ssValue >> nBalanceReserve;
 941             }
 942             else if (strType == "minversion")
 943             {
 944                 int nMinVersion = 0;
 945                 ssValue >> nMinVersion;
 946                 if (nMinVersion > VERSION)
 947                     return DB_TOO_NEW;
 948             }
 949         }
 950         pcursor->close();
 951     }
 952
 953     BOOST_FOREACH(uint256 hash, vWalletUpgrade)
 954         WriteTx(hash, pwallet->mapWallet[hash]);
 955
 956     printf("nFileVersion = %d\n", nFileVersion);
 957     printf("fGenerateBitcoins = %d\n", fGenerateBitcoins);
 958     printf("nTransactionFee = %"PRI64d"\n", nTransactionFee);
 959     printf("fMinimizeToTray = %d\n", fMinimizeToTray);
 960     printf("fMinimizeOnClose = %d\n", fMinimizeOnClose);
 961     printf("fUseProxy = %d\n", fUseProxy);
 962     printf("addrProxy = %s\n", addrProxy.ToString().c_str());
 963     if (fHaveUPnP)
 964         printf("fUseUPnP = %d\n", fUseUPnP);
 965
 966
 967     // Rewrite encrypted wallets of versions 0.4.0 and 0.5.0rc:
 968     if (fIsEncrypted && (nFileVersion == 40000 || nFileVersion == 50000))
 969         return DB_NEED_REWRITE;
 970
 971     if (nFileVersion < VERSION) // Update
 972     {
 973         // Get rid of old debug.log file in current directory
 974         if (nFileVersion <= 105 && !pszSetDataDir[0])
 975             unlink("debug.log");
 976
 977         WriteVersion(VERSION);
 978     }
 979
 980     return DB_LOAD_OK;
 981 }
 982
 983 void ThreadFlushWalletDB(void* parg)
 984 {
 985     const string& strFile = ((const string*)parg)[0];
 986     static bool fOneThread;
 987     if (fOneThread)
 988         return;
 989     fOneThread = true;
 990     if (mapArgs.count("-noflushwallet"))
 991         return;
 992
 993     unsigned int nLastSeen = nWalletDBUpdated;
 994     unsigned int nLastFlushed = nWalletDBUpdated;
 995     int64 nLastWalletUpdate = GetTime();
 996     while (!fShutdown)
 997     {
 998         Sleep(500);
 999
1000         if (nLastSeen != nWalletDBUpdated)
1001         {
1002             nLastSeen = nWalletDBUpdated;
1003             nLastWalletUpdate = GetTime();
1004         }
1005
1006         if (nLastFlushed != nWalletDBUpdated && GetTime() - nLastWalletUpdate >= 2)
1007         {
1008             TRY_CRITICAL_BLOCK(cs_db)
1009             {
1010                 // Don't do this if any databases are in use
1011                 int nRefCount = 0;
1012                 map<string, int>::iterator mi = mapFileUseCount.begin();
1013                 while (mi != mapFileUseCount.end())
1014                 {
1015                     nRefCount += (*mi).second;
1016                     mi++;
1017                 }
1018
1019                 if (nRefCount == 0 && !fShutdown)
1020                 {
1021                     map<string, int>::iterator mi = mapFileUseCount.find(strFile);
1022                     if (mi != mapFileUseCount.end())
1023                     {
1024                         printf("%s ", DateTimeStrFormat("%x %H:%M:%S", GetTime()).c_str());
1025                         printf("Flushing wallet.dat\n");
1026                         nLastFlushed = nWalletDBUpdated;
1027                         int64 nStart = GetTimeMillis();
1028
1029                         // Flush wallet.dat so it's self contained
1030                         CloseDb(strFile);
1031                         dbenv.txn_checkpoint(0, 0, 0);
1032                         dbenv.lsn_reset(strFile.c_str(), 0);
1033
1034                         mapFileUseCount.erase(mi++);
1035                         printf("Flushed wallet.dat %"PRI64d"ms\n", GetTimeMillis() - nStart);
1036                     }
1037                 }
1038             }
1039         }
1040     }
1041 }
1042
1043 bool BackupWallet(const CWallet& wallet, const string& strDest)
1044 {
1045     if (!wallet.fFileBacked)
1046         return false;
1047     while (!fShutdown)
1048     {
1049         CRITICAL_BLOCK(cs_db)
1050         {
1051             if (!mapFileUseCount.count(wallet.strWalletFile) || mapFileUseCount[wallet.strWalletFile] == 0)
1052             {
1053                 // Flush log data to the dat file
1054                 CloseDb(wallet.strWalletFile);
1055                 dbenv.txn_checkpoint(0, 0, 0);
1056                 dbenv.lsn_reset(wallet.strWalletFile.c_str(), 0);
1057                 mapFileUseCount.erase(wallet.strWalletFile);
1058
1059                 // Copy wallet.dat
1060                 filesystem::path pathSrc(GetDataDir() + "/" + wallet.strWalletFile);
1061                 filesystem::path pathDest(strDest);
1062                 if (filesystem::is_directory(pathDest))
1063                     pathDest = pathDest / wallet.strWalletFile;
1064 #if BOOST_VERSION >= 104000
1065                 filesystem::copy_file(pathSrc, pathDest, filesystem::copy_option::overwrite_if_exists);
1066 #else
1067                 filesystem::copy_file(pathSrc, pathDest);
1068 #endif
1069                 printf("copied wallet.dat to %s\n", pathDest.string().c_str());
1070
1071                 return true;
1072             }
1073         }
1074         Sleep(100);
1075     }
1076     return false;
1077 }