C++ CBlockIndex::GetBlockTrust方法代码示例

bool CTxDB::LoadBlockIndex()
{
    if (mapBlockIndex.size() > 0) {
        // Already loaded once in this session. It can happen during migration
        // from BDB.
        return true;
    }
    // The block index is an in-memory structure that maps hashes to on-disk
    // locations where the contents of the block can be found. Here, we scan it
    // out of the DB and into mapBlockIndex.
    leveldb::Iterator *iterator = pdb->NewIterator(leveldb::ReadOptions());
    // Seek to start key.
    CDataStream ssStartKey(SER_DISK, CLIENT_VERSION);
    ssStartKey << make_pair(string("blockindex"), uint256(0));
    iterator->Seek(ssStartKey.str());
    // Now read each entry.
    while (iterator->Valid())
    {
        // Unpack keys and values.
        CDataStream ssKey(SER_DISK, CLIENT_VERSION);
        ssKey.write(iterator->key().data(), iterator->key().size());
        CDataStream ssValue(SER_DISK, CLIENT_VERSION);
        ssValue.write(iterator->value().data(), iterator->value().size());
        string strType;
        ssKey >> strType;
        // Did we reach the end of the data to read?
        if (fRequestShutdown || strType != "blockindex")
            break;
        CDiskBlockIndex diskindex;
        ssValue >> diskindex;

        uint256 blockHash = diskindex.GetBlockHash();

        // Construct block index object
        CBlockIndex* pindexNew    = InsertBlockIndex(blockHash);
        pindexNew->pprev          = InsertBlockIndex(diskindex.hashPrev);
        pindexNew->pnext          = InsertBlockIndex(diskindex.hashNext);
        pindexNew->nFile          = diskindex.nFile;
        pindexNew->nBlockPos      = diskindex.nBlockPos;
        pindexNew->nHeight        = diskindex.nHeight;
        pindexNew->nMint          = diskindex.nMint;
        pindexNew->nMoneySupply   = diskindex.nMoneySupply;
        pindexNew->nFlags         = diskindex.nFlags;
        pindexNew->nStakeModifier = diskindex.nStakeModifier;
        pindexNew->prevoutStake   = diskindex.prevoutStake;
        pindexNew->nStakeTime     = diskindex.nStakeTime;
        pindexNew->hashProofOfStake = diskindex.hashProofOfStake;
        pindexNew->nVersion       = diskindex.nVersion;
        pindexNew->hashMerkleRoot = diskindex.hashMerkleRoot;
        pindexNew->nTime          = diskindex.nTime;
        pindexNew->nBits          = diskindex.nBits;
        pindexNew->nNonce         = diskindex.nNonce;

        // Watch for genesis block
        if (pindexGenesisBlock == NULL && blockHash == (!fTestNet ? hashGenesisBlock : hashGenesisBlockTestNet))
            pindexGenesisBlock = pindexNew;

        if (!pindexNew->CheckIndex()) {
            delete iterator;
            return error("LoadBlockIndex() : CheckIndex failed at %d", pindexNew->nHeight);
        }

        // CurrentCoin: build setStakeSeen
        if (pindexNew->IsProofOfStake())
            setStakeSeen.insert(make_pair(pindexNew->prevoutStake, pindexNew->nStakeTime));

        iterator->Next();
    }
    delete iterator;

    if (fRequestShutdown)
        return true;

    // Calculate nChainTrust
    vector<pair<int, CBlockIndex*> > vSortedByHeight;
    vSortedByHeight.reserve(mapBlockIndex.size());
    BOOST_FOREACH(const PAIRTYPE(uint256, CBlockIndex*)& item, mapBlockIndex)
    {
        CBlockIndex* pindex = item.second;
        vSortedByHeight.push_back(make_pair(pindex->nHeight, pindex));
    }
    sort(vSortedByHeight.begin(), vSortedByHeight.end());
    BOOST_FOREACH(const PAIRTYPE(int, CBlockIndex*)& item, vSortedByHeight)
    {
        CBlockIndex* pindex = item.second;
        pindex->nChainTrust = (pindex->pprev ? pindex->pprev->nChainTrust : 0) + pindex->GetBlockTrust();
        // CurrentCoin: calculate stake modifier checksum
        pindex->nStakeModifierChecksum = GetStakeModifierChecksum(pindex);
        if (!CheckStakeModifierCheckpoints(pindex->nHeight, pindex->nStakeModifierChecksum))
            return error("CTxDB::LoadBlockIndex() : Failed stake modifier checkpoint height=%d, modifier=0x%016"PRI64x, pindex->nHeight, pindex->nStakeModifier);
    }

    // Load hashBestChain pointer to end of best chain
    if (!ReadHashBestChain(hashBestChain))
    {
        if (pindexGenesisBlock == NULL)
            return true;
        return error("CTxDB::LoadBlockIndex() : hashBestChain not loaded");
    }
    if (!mapBlockIndex.count(hashBestChain))
//.........这里部分代码省略.........

bool CTxDB::LoadBlockIndex()
{
    if (!LoadBlockIndexGuts())
        return false;

    if (fRequestShutdown)
        return true;

    // Calculate bnChainTrust
    vector<pair<int, CBlockIndex*> > vSortedByHeight;
    vSortedByHeight.reserve(mapBlockIndex.size());
    BOOST_FOREACH(const PAIRTYPE(uint256, CBlockIndex*)& item, mapBlockIndex)
    {
        CBlockIndex* pindex = item.second;
        vSortedByHeight.push_back(make_pair(pindex->nHeight, pindex));
    }
    sort(vSortedByHeight.begin(), vSortedByHeight.end());
    BOOST_FOREACH(const PAIRTYPE(int, CBlockIndex*)& item, vSortedByHeight)
    {
        CBlockIndex* pindex = item.second;
        pindex->bnChainTrust = (pindex->pprev ? pindex->pprev->bnChainTrust : 0) + pindex->GetBlockTrust();
        // ppcoin: calculate stake modifier checksum
        pindex->nStakeModifierChecksum = GetStakeModifierChecksum(pindex);
        if (!CheckStakeModifierCheckpoints(pindex->nHeight, pindex->nStakeModifierChecksum))
            return error("CTxDB::LoadBlockIndex() : Failed stake modifier checkpoint height=%d, modifier=0x%016"PRI64x, pindex->nHeight, pindex->nStakeModifier);
    }

    // Load hashBestChain pointer to end of best chain
    if (!ReadHashBestChain(hashBestChain))
    {
        if (pindexGenesisBlock == NULL)
            return true;
        return error("CTxDB::LoadBlockIndex() : hashBestChain not loaded");
    }
    if (!mapBlockIndex.count(hashBestChain))
        return error("CTxDB::LoadBlockIndex() : hashBestChain not found in the block index");
    pindexBest = mapBlockIndex[hashBestChain];
    nBestHeight = pindexBest->nHeight;
    bnBestChainTrust = pindexBest->bnChainTrust;
    printf("LoadBlockIndex(): hashBestChain=%s  height=%d  trust=%s  date=%s\n",
      hashBestChain.ToString().substr(0,20).c_str(), nBestHeight, bnBestChainTrust.ToString().c_str(),
      DateTimeStrFormat("%x %H:%M:%S", pindexBest->GetBlockTime()).c_str());

    // ppcoin: load hashSyncCheckpoint
    if (!ReadSyncCheckpoint(Checkpoints::hashSyncCheckpoint))
        return error("CTxDB::LoadBlockIndex() : hashSyncCheckpoint not loaded");
    printf("LoadBlockIndex(): synchronized checkpoint %s\n", Checkpoints::hashSyncCheckpoint.ToString().c_str());

    // Load bnBestInvalidTrust, OK if it doesn't exist
    ReadBestInvalidTrust(bnBestInvalidTrust);

    // Verify blocks in the best chain
    int nCheckLevel = GetArg("-checklevel", 1);
    int nCheckDepth = GetArg( "-checkblocks", 2500);
    if (nCheckDepth == 0)
        nCheckDepth = 1000000000; // suffices until the year 19000
    if (nCheckDepth > nBestHeight)
        nCheckDepth = nBestHeight;
    printf("Verifying last %i blocks at level %i\n", nCheckDepth, nCheckLevel);
    CBlockIndex* pindexFork = NULL;
    map<pair<unsigned int, unsigned int>, CBlockIndex*> mapBlockPos;
    for (CBlockIndex* pindex = pindexBest; pindex && pindex->pprev; pindex = pindex->pprev)
    {
        if (fRequestShutdown || pindex->nHeight < nBestHeight-nCheckDepth)
            break;
        CBlock block;
        if (!block.ReadFromDisk(pindex))
            return error("LoadBlockIndex() : block.ReadFromDisk failed");
        // check level 1: verify block validity
        if (nCheckLevel>0 && !block.CheckBlock())
        {
            printf("LoadBlockIndex() : *** found bad block at %d, hash=%s\n", pindex->nHeight, pindex->GetBlockHash().ToString().c_str());
            pindexFork = pindex->pprev;
        }
        // check level 2: verify transaction index validity
        if (nCheckLevel>1)
        {
            pair<unsigned int, unsigned int> pos = make_pair(pindex->nFile, pindex->nBlockPos);
            mapBlockPos[pos] = pindex;
            BOOST_FOREACH(const CTransaction &tx, block.vtx)
            {
                uint256 hashTx = tx.GetHash();
                CTxIndex txindex;
                if (ReadTxIndex(hashTx, txindex))
                {
                    // check level 3: checker transaction hashes
                    if (nCheckLevel>2 || pindex->nFile != txindex.pos.nFile || pindex->nBlockPos != txindex.pos.nBlockPos)
                    {
                        // either an error or a duplicate transaction
                        CTransaction txFound;
                        if (!txFound.ReadFromDisk(txindex.pos))
                        {
                            printf("LoadBlockIndex() : *** cannot read mislocated transaction %s\n", hashTx.ToString().c_str());
                            pindexFork = pindex->pprev;
                        }
                        else
                            if (txFound.GetHash() != hashTx) // not a duplicate tx
                            {
                                printf("LoadBlockIndex(): *** invalid tx position for %s\n", hashTx.ToString().c_str());
                                pindexFork = pindex->pprev;
//.........这里部分代码省略.........

//.........这里部分代码省略.........
#ifdef WIN32
            ++nCounter;
            if( 0 == (nCounter % nUpdatePeriod) )
            {
    #ifdef QT_GUI
                uiInterface.InitMessage( strprintf( _("%7d"), nCounter ) );
    #else
                if (fPrintToConsole) 
                    printf( "%7d\r", nCounter );
    #endif
            }
#endif        
        }
        sort(vSortedByHeight.begin(), vSortedByHeight.end());
#ifdef WIN32
        if (fPrintToConsole) 
            (void)printf( "\ndone\nChecking stake checksums...\n" );
    #ifdef _DEBUG
        nUpdatePeriod /= 4; // speed up update for debug mode
    #else
        nUpdatePeriod *= 5; // slow down update for release mode
    #endif
    #ifdef QT_GUI
        uiInterface.InitMessage( _("done") );
        uiInterface.InitMessage( _("Checking stake checksums...") );
    #endif
        nCounter = 0;
#endif
        BOOST_FOREACH(const PAIRTYPE(int, CBlockIndex*)& item, vSortedByHeight)
        {
            CBlockIndex* pindex = item.second;
            pindex->nPosBlockCount = ( pindex->pprev ? pindex->pprev->nPosBlockCount : 0 ) + ( pindex->IsProofOfStake() ? 1 : 0 );
            pindex->nBitsMA = pindex->IsProofOfStake() ? GetProofOfWorkMA(pindex->pprev) : 0;
            pindex->bnChainTrust = (pindex->pprev ? pindex->pprev->bnChainTrust : CBigNum(0)) + pindex->GetBlockTrust();
            // NovaCoin: calculate stake modifier checksum
            pindex->nStakeModifierChecksum = GetStakeModifierChecksum(pindex);
            if (!CheckStakeModifierCheckpoints(pindex->nHeight, pindex->nStakeModifierChecksum))
                return error("CTxDB::LoadBlockIndex() : Failed stake modifier checkpoint height=%d, modifier=0x%016" PRIx64, pindex->nHeight, pindex->nStakeModifier);
#ifdef WIN32
            ++nCounter;
            if( 0 == (nCounter % nUpdatePeriod) )
            {
    #ifdef QT_GUI
                uiInterface.InitMessage( strprintf( _("%7d"), nCounter ) );
    #else
                if (fPrintToConsole) 
                    printf( "%7d\r", nCounter );
    #endif
            }
#endif        
        }
    }

#ifdef WIN32
    if (fPrintToConsole) 
        (void)printf( "\ndone\n"
                      "Read best chain\n" 
                    );        
    #ifdef QT_GUI
    uiInterface.InitMessage( _("...done") );
    uiInterface.InitMessage( _("Read best chain") );
    #endif
#endif        

    // Load hashBestChain pointer to end of best chain
    if (!ReadHashBestChain(hashBestChain))