src/txdb.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 "txdb.h"
   7 #include "main.h"
   8
   9 using namespace std;
  10
  11 void static BatchWriteCoins(CLevelDBBatch &batch, const uint256 &hash, const CCoins &coins) {
  12     batch.Write(make_pair('c', hash), coins);
  13 }
  14
  15 void static BatchWriteHashBestChain(CLevelDBBatch &batch, const uint256 &hash) {
  16     batch.Write('B', hash);
  17 }
  18
  19 CCoinsViewDB::CCoinsViewDB(bool fMemory) : db(GetDataDir() / "coins", fMemory) {
  20 }
  21
  22 bool CCoinsViewDB::GetCoins(uint256 txid, CCoins &coins) {
  23     return db.Read(make_pair('c', txid), coins);
  24 }
  25
  26 bool CCoinsViewDB::SetCoins(uint256 txid, const CCoins &coins) {
  27     CLevelDBBatch batch;
  28     BatchWriteCoins(batch, txid, coins);
  29     return db.WriteBatch(batch);
  30 }
  31
  32 bool CCoinsViewDB::HaveCoins(uint256 txid) {
  33     return db.Exists(make_pair('c', txid));
  34 }
  35
  36 CBlockIndex *CCoinsViewDB::GetBestBlock() {
  37     uint256 hashBestChain;
  38     if (!db.Read('B', hashBestChain))
  39         return NULL;
  40     std::map<uint256, CBlockIndex*>::iterator it = mapBlockIndex.find(hashBestChain);
  41     if (it == mapBlockIndex.end())
  42         return NULL;
  43     return it->second;
  44 }
  45
  46 bool CCoinsViewDB::SetBestBlock(CBlockIndex *pindex) {
  47     CLevelDBBatch batch;
  48     BatchWriteHashBestChain(batch, pindex->GetBlockHash());
  49     return db.WriteBatch(batch);
  50 }
  51
  52 bool CCoinsViewDB::BatchWrite(const std::map<uint256, CCoins> &mapCoins, CBlockIndex *pindex) {
  53     printf("Committing %u changed transactions to coin database...\n", (unsigned int)mapCoins.size());
  54
  55     CLevelDBBatch batch;
  56     for (std::map<uint256, CCoins>::const_iterator it = mapCoins.begin(); it != mapCoins.end(); it++)
  57         BatchWriteCoins(batch, it->first, it->second);
  58     BatchWriteHashBestChain(batch, pindex->GetBlockHash());
  59
  60     return db.WriteBatch(batch);
  61 }
  62
  63 CBlockTreeDB::CBlockTreeDB(bool fMemory) : CLevelDB(GetDataDir() / "blktree", fMemory) {
  64 }
  65
  66 bool CBlockTreeDB::WriteBlockIndex(const CDiskBlockIndex& blockindex)
  67 {
  68     return Write(make_pair('b', blockindex.GetBlockHash()), blockindex);
  69 }
  70
  71 bool CBlockTreeDB::ReadBestInvalidTrust(CBigNum& bnBestInvalidTrust)
  72 {
  73     return Read('I', bnBestInvalidTrust);
  74 }
  75
  76 bool CBlockTreeDB::WriteBestInvalidTrust(CBigNum bnBestInvalidTrust)
  77 {
  78     return Write('I', bnBestInvalidTrust);
  79 }
  80
  81 bool CBlockTreeDB::ReadSyncCheckpoint(uint256& hashCheckpoint)
  82 {
  83     return Read('H', hashCheckpoint);
  84 }
  85
  86 bool CBlockTreeDB::WriteSyncCheckpoint(uint256 hashCheckpoint)
  87 {
  88     return Write('H', hashCheckpoint);
  89 }
  90
  91 bool CBlockTreeDB::ReadCheckpointPubKey(string& strPubKey)
  92 {
  93     return Read('K', strPubKey);
  94 }
  95
  96 bool CBlockTreeDB::WriteCheckpointPubKey(const string& strPubKey)
  97 {
  98     return Write('K', strPubKey);
  99 }
 100
 101 bool CBlockTreeDB::WriteBlockFileInfo(int nFile, const CBlockFileInfo &info) {
 102     return Write(make_pair('f', nFile), info);
 103 }
 104
 105 bool CBlockTreeDB::ReadBlockFileInfo(int nFile, CBlockFileInfo &info) {
 106     return Read(make_pair('f', nFile), info);
 107 }
 108
 109 bool CBlockTreeDB::WriteLastBlockFile(int nFile) {
 110     return Write('l', nFile);
 111 }
 112
 113 bool CBlockTreeDB::ReadLastBlockFile(int &nFile) {
 114     return Read('l', nFile);
 115 }
 116
 117 bool CCoinsViewDB::GetStats(CCoinsStats &stats) {
 118     leveldb::Iterator *pcursor = db.NewIterator();
 119     pcursor->SeekToFirst();
 120
 121     while (pcursor->Valid()) {
 122         try {
 123             leveldb::Slice slKey = pcursor->key();
 124             CDataStream ssKey(slKey.data(), slKey.data()+slKey.size(), SER_DISK, CLIENT_VERSION);
 125             char chType;
 126             ssKey >> chType;
 127             if (chType == 'c' && !fRequestShutdown) {
 128                 leveldb::Slice slValue = pcursor->value();
 129                 CDataStream ssValue(slValue.data(), slValue.data()+slValue.size(), SER_DISK, CLIENT_VERSION);
 130                 CCoins coins;
 131                 ssValue >> coins;
 132                 uint256 txhash;
 133                 ssKey >> txhash;
 134                 if (!coins.IsPruned()) {
 135                     stats.nTransactions++;
 136                     BOOST_FOREACH(const CTxOut &out, coins.vout) {
 137                         if (!out.IsNull())
 138                             stats.nTransactionOutputs++;
 139                     }
 140                 }
 141                 else {
 142                     stats.nPrunedTransactions++;
 143                 }
 144                 stats.nSerializedSize += 32 + slValue.size();
 145             }
 146             pcursor->Next();
 147         } catch (std::exception &e) {
 148             return error("%s() : deserialize error", __PRETTY_FUNCTION__);
 149         }
 150     }
 151     delete pcursor;
 152     stats.nHeight = GetBestBlock()->nHeight;
 153     return true;
 154 }
 155
 156 bool CBlockTreeDB::LoadBlockIndexGuts()
 157 {
 158     leveldb::Iterator *pcursor = NewIterator();
 159
 160     CDataStream ssKeySet(SER_DISK, CLIENT_VERSION);
 161     ssKeySet << make_pair('b', uint256(0));
 162     pcursor->Seek(ssKeySet.str());
 163
 164     // Load mapBlockIndex
 165     while (pcursor->Valid()) {
 166         try {
 167             leveldb::Slice slKey = pcursor->key();
 168             CDataStream ssKey(slKey.data(), slKey.data()+slKey.size(), SER_DISK, CLIENT_VERSION);
 169             char chType;
 170             ssKey >> chType;
 171             if (chType == 'b' && !fRequestShutdown) {
 172                 leveldb::Slice slValue = pcursor->value();
 173                 CDataStream ssValue(slValue.data(), slValue.data()+slValue.size(), SER_DISK, CLIENT_VERSION);
 174                 CDiskBlockIndex diskindex;
 175                 ssValue >> diskindex;
 176
 177                 uint256 blockHash = diskindex.GetBlockHash();
 178
 179                 // Construct block index object
 180                 CBlockIndex* pindexNew = InsertBlockIndex(blockHash);
 181                 pindexNew->pprev          = InsertBlockIndex(diskindex.hashPrev);
 182                 pindexNew->nHeight        = diskindex.nHeight;
 183                 pindexNew->nFile          = diskindex.nFile;
 184                 pindexNew->nDataPos       = diskindex.nDataPos;
 185                 pindexNew->nUndoPos       = diskindex.nUndoPos;
 186                 pindexNew->nMint          = diskindex.nMint;
 187                 pindexNew->nMoneySupply   = diskindex.nMoneySupply;
 188                 pindexNew->nFlags         = diskindex.nFlags;
 189                 pindexNew->nStakeModifier = diskindex.nStakeModifier;
 190                 pindexNew->prevoutStake   = diskindex.prevoutStake;
 191                 pindexNew->nStakeTime     = diskindex.nStakeTime;
 192                 pindexNew->hashProofOfStake = diskindex.hashProofOfStake;
 193                 pindexNew->nVersion       = diskindex.nVersion;
 194                 pindexNew->hashMerkleRoot = diskindex.hashMerkleRoot;
 195                 pindexNew->nTime          = diskindex.nTime;
 196                 pindexNew->nBits          = diskindex.nBits;
 197                 pindexNew->nNonce         = diskindex.nNonce;
 198                 pindexNew->nStatus        = diskindex.nStatus;
 199                 pindexNew->nTx            = diskindex.nTx;
 200
 201                 // Watch for genesis block
 202                 if (pindexGenesisBlock == NULL && blockHash == (!fTestNet ? hashGenesisBlock : hashGenesisBlockTestNet))
 203                     pindexGenesisBlock = pindexNew;
 204
 205                 if (!pindexNew->CheckIndex())
 206                     return error("LoadBlockIndex() : CheckIndex failed: %s", pindexNew->ToString().c_str());
 207
 208                 // Build setStakeSeen
 209                 if (pindexNew->IsProofOfStake())
 210                     setStakeSeen.insert(make_pair(pindexNew->prevoutStake, pindexNew->nStakeTime));
 211
 212                 pcursor->Next();
 213             } else {
 214                 break; // if shutdown requested or finished loading block index
 215             }
 216         } catch (std::exception &e) {
 217             return error("%s() : deserialize error", __PRETTY_FUNCTION__);
 218         }
 219     }
 220     delete pcursor;
 221
 222     return true;
 223 }