C++ CBlockIndex::IsProofOfStake方法代码示例

double GetPoSKernelPS()
{
    int nPoSInterval = 72;
    double dStakeKernelsTriedAvg = 0;
    int nStakesHandled = 0, nStakesTime = 0;

    CBlockIndex* pindex = pindexBest;;
    CBlockIndex* pindexPrevStake = NULL;

    while (pindex && nStakesHandled < nPoSInterval)
    {
        if (pindex->IsProofOfStake())
        {
            dStakeKernelsTriedAvg += GetDifficulty(pindex) * 4294967296.0;
            nStakesTime += pindexPrevStake ? (pindexPrevStake->nTime - pindex->nTime) : 0;
            pindexPrevStake = pindex;
            nStakesHandled++;
        }

        pindex = pindex->pprev;
    }

    double result = 0;

    if (nStakesTime)
        result = dStakeKernelsTriedAvg / nStakesTime;

    return result;
}

double GetPoSKernelPS()
{
    int nPoSInterval = 72;
    double dStakeKernelsTriedAvg = 0;
    int nStakesHandled = 0, nStakesTime = 0;

    CBlockIndex* pindex = pindexBest;;
    CBlockIndex* pindexPrevStake = NULL;

    while (pindex && nStakesHandled < nPoSInterval)
    {
        if (pindex->IsProofOfStake())
        {
            if (pindexPrevStake)
            {
                dStakeKernelsTriedAvg += GetDifficulty(pindexPrevStake) * 4294967296.0;
                nStakesTime += pindexPrevStake->nTime - pindex->nTime;
                nStakesHandled++;
            }
            pindexPrevStake = pindex;
        }

        pindex = pindex->pprev;
    }

    double result = 0;

    if (nStakesTime)
        result = dStakeKernelsTriedAvg / nStakesTime;

    if (IsProtocolV2(nBestHeight))
        result *= STAKE_TIMESTAMP_MASK + 1;

    return result;
}

double GetPoSKernelPS()
{
    int nPoSInterval = 72;
    if (!fTestNet){
        if (pindexBest->nHeight >= KGW_FORK_BLOCK)
        {
            nPoSInterval = 144;
        }
    }
    double dStakeKernelsTriedAvg = 0;
    int nStakesHandled = 0, nStakesTime = 0;

    CBlockIndex* pindex = pindexBest;;
    CBlockIndex* pindexPrevStake = NULL;

    while (pindex && nStakesHandled < nPoSInterval)
    {
        if (pindex->IsProofOfStake())
        {
            dStakeKernelsTriedAvg += GetDifficulty(pindex) * 4294967296.0;
            nStakesTime += pindexPrevStake ? (pindexPrevStake->nTime - pindex->nTime) : 0;
            pindexPrevStake = pindex;
            nStakesHandled++;
        }

        pindex = pindex->pprev;
    }

    return nStakesTime ? dStakeKernelsTriedAvg / nStakesTime : 0;
}

double GetPoSKernelPS()
{
    int nPoSInterval = 72;
    double dStakeKernelsTriedAvg = 0;
    int nStakesHandled = 0, nStakesTime = 0;
    
    if (nNodeMode == NT_THIN)
    {
        CBlockThinIndex* pindex = pindexBestHeader;;
        CBlockThinIndex* pindexPrevStake = NULL;
        
        while (pindex && nStakesHandled < nPoSInterval)
        {
            if (pindex->IsProofOfStake())
            {
                if (pindexPrevStake)
                {
                    dStakeKernelsTriedAvg += GetHeaderDifficulty(pindex) * 4294967296.0;
                    nStakesTime += pindexPrevStake ? (pindexPrevStake->nTime - pindex->nTime) : 0;
                    nStakesHandled++;
                };
                pindexPrevStake = pindex;
            };
            
            pindex = pindex->pprev;
        };
    } else
    {
        CBlockIndex* pindex = pindexBest;;
        CBlockIndex* pindexPrevStake = NULL;
        
        while (pindex && nStakesHandled < nPoSInterval)
        {
            if (pindex->IsProofOfStake())
            {
                if (pindexPrevStake)
                {
                    dStakeKernelsTriedAvg += GetDifficulty(pindex) * 4294967296.0;
                    nStakesTime += pindexPrevStake ? (pindexPrevStake->nTime - pindex->nTime) : 0;
                    nStakesHandled++;
                };
                pindexPrevStake = pindex;
            };
            
            pindex = pindex->pprev;
        };
    };
    
    
    double result = 0;
    
    if (nStakesTime)
        result = dStakeKernelsTriedAvg / nStakesTime;
    
    if (Params().IsProtocolV2(nBestHeight))
        result *= STAKE_TIMESTAMP_MASK + 1;
    
    return result;
}

bool CTxDB::LoadBlockIndex()
{
    // Get database cursor
    Dbc* pcursor = GetCursor();
    if (!pcursor)
        return false;

    // Load mapBlockIndex
    unsigned int fFlags = DB_SET_RANGE;
    for (;;)
    {
        // Read next record
        CDataStream ssKey(SER_DISK, CLIENT_VERSION);
        if (fFlags == DB_SET_RANGE)
            ssKey << make_pair(string("blockindex"), uint256(0));
        CDataStream ssValue(SER_DISK, CLIENT_VERSION);
        int ret = ReadAtCursor(pcursor, ssKey, ssValue, fFlags);
        fFlags = DB_NEXT;
        if (ret == DB_NOTFOUND)
            break;
        else if (ret != 0)
            return false;

        // Unserialize

        try {
        string strType;
        ssKey >> strType;
        if (strType == "blockindex" && !fRequestShutdown)
        {
            CDiskBlockIndex diskindex;
            ssValue >> diskindex;

            // Construct block index object
            CBlockIndex* pindexNew = InsertBlockIndex(diskindex.GetBlockHash());
            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 && diskindex.GetBlockHash() == hashGenesisBlock)
                pindexGenesisBlock = pindexNew;

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

            // paycoin: build setStakeSeen
            if (pindexNew->IsProofOfStake())
                setStakeSeen.insert(make_pair(pindexNew->prevoutStake, pindexNew->nStakeTime));
        }
        else
        {
            break; // if shutdown requested or finished loading block index
        }
        }    // try
        catch (std::exception &e) {

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.........

Value getmininginfo(const Array& params, bool fHelp)
{
    if (fHelp || params.size() != 0)
        throw runtime_error(
            "getmininginfo\n"
            "Returns an object containing mining-related information.");

    double dStakeKernelsTriedAvg = 0;
    int nPoWInterval = 72, nPoSInterval = 72, nStakesHandled = 0, nStakesTime = 0;
    int64 nTargetSpacingWorkMin = 2, nTargetSpacingWork = 2;

    CBlockIndex* pindex = pindexGenesisBlock;
    CBlockIndex* pindexPrevWork = pindexGenesisBlock;
    CBlockIndex* pindexPrevStake = NULL;

    while (pindex)
    {
        if (pindex->IsProofOfWork())
        {
            int64 nActualSpacingWork = pindex->GetBlockTime() - pindexPrevWork->GetBlockTime();
            nTargetSpacingWork = ((nPoWInterval - 1) * nTargetSpacingWork + nActualSpacingWork + nActualSpacingWork) / (nPoWInterval + 1);
            nTargetSpacingWork = max(nTargetSpacingWork, nTargetSpacingWorkMin);
            pindexPrevWork = pindex;
        }

        pindex = pindex->pnext;
    }


    pindex = pindexBest;

    while (pindex && nStakesHandled < nPoSInterval)
    {
        if (pindex->IsProofOfStake())
        {
            dStakeKernelsTriedAvg += GetDifficulty(pindex) * 4294967296;
            nStakesTime += pindexPrevStake ? (pindexPrevStake->nTime - pindex->nTime) : 0;
            pindexPrevStake = pindex;
            nStakesHandled++;
        }

        pindex = pindex->pprev;
    }

    double dNetworkMhps = GetDifficulty() * 4294.967296 / nTargetSpacingWork;
    double dNetworkWeight = dStakeKernelsTriedAvg / nStakesTime;

    Object obj;
    obj.push_back(Pair("blocks", (int)nBestHeight));
    obj.push_back(Pair("currentblocksize",(uint64_t)nLastBlockSize));
    obj.push_back(Pair("currentblocktx",(uint64_t)nLastBlockTx));
    obj.push_back(Pair("difficulty", (double)GetDifficulty()));
    obj.push_back(Pair("networkhashps", getnetworkhashps(params, false)));
    //obj.push_back(Pair("blockvalue", (uint64_t)GetProofOfWorkReward(GetLastBlockIndex(pindexBest, false)->nBits)));
    //obj.push_back(Pair("powmhashps", dNetworkMhps));
    obj.push_back(Pair("netstakeweight", dNetworkWeight));
    obj.push_back(Pair("errors", GetWarnings("statusbar")));
    obj.push_back(Pair("pooledtx", (uint64_t)mempool.size()));
    obj.push_back(Pair("belowweight", (uint64_t)pwalletMain->GetStakeWeight(*pwalletMain, STAKE_BELOWMIN)));
    obj.push_back(Pair("stakeweight", (uint64_t)pwalletMain->GetStakeWeight(*pwalletMain, STAKE_NORMAL)));
    obj.push_back(Pair("minweight", (uint64_t)pwalletMain->GetStakeWeight(*pwalletMain, STAKE_MINWEIGHT)));
    obj.push_back(Pair("maxweight", (uint64_t)pwalletMain->GetStakeWeight(*pwalletMain, STAKE_MAXWEIGHT)));
    obj.push_back(Pair("StakeReadytunes", ((uint64_t)pwalletMain->GetStakeWeight(*pwalletMain, STAKE_NORMAL))/730));
    //obj.push_back(Pair("stakeinterest", (uint64_t)GetProofOfStakeReward(0, GetLastBlockIndex(pindexBest, true)->nBits, GetLastBlockIndex(pindexBest, true)->nTime, true)));
    obj.push_back(Pair("testnet", fTestNet));
    return obj;
}

void ProfitExplorerPage::loadStakeChart(bool firstRun)
{
        if(fShutdown)
	return;

    nTimeData.clear();
    netStakeData.clear();
    myStakeData.clear();
    difficultyData.clear();
    velTimeData.clear();
    velAmountData.clear();

    // go back this many blocks max
    int max = ui->spinBox->value();
    int i = 0;

    //BOOST_REVERSE_FOREACH(const PAIRTYPE(uint256, CBlockIndex*)& b, mapBlockIndex)
    //{
    //    if(i >= max)
    //        break;
    CBlockIndex* pindex = pindexBest;
    while(i < max && pindex != NULL)
    {
        //CBlockIndex* pindex = b.second;
        if(pindex->IsProofOfStake())
	{
            nTimeData.append(pindex->nTime);
	    netStakeData.append(pindex->nMint / COIN);

	    // Read the block in and check if the coinstake is ours
	    CBlock block;
	    block.ReadFromDisk(pindex, true);
	    if(block.IsProofOfStake()) // this should always be true here
	    {
		velTimeData.append(pindex->nTime);
		double blockOutAmount = 0;
		for(int j=0; j<block.vtx.size(); j++)
		{
		    blockOutAmount += block.vtx[j].GetValueOut() / COIN;
		}
		velAmountData.append(blockOutAmount);

		difficultyData.append(GetDifficulty(pindex));
		if(pwalletMain->IsMine(block.vtx[1]))
		{
		    myStakeData.append(pindex->nMint / COIN);
		}
		else
		{
		    myStakeData.append(0);
		}
	    }
	    else
	    {
		myStakeData.append(0); // should never happen
	    }
	    i = i + 1;
	}
        pindex = pindex->pprev;
        //++i;
    }    

    if(!firstRun)
    {
        uint64_t nMinWeight = 0, nMaxWeight = 0, nWeight = 0;
        pwalletMain->GetStakeWeight(*pwalletMain, nMinWeight, nMaxWeight, nWeight);

        uint64_t nNetworkWeight = 0;
        if(pindexBest)
            nNetworkWeight = GetPoSKernelPS();
        bool staking = nLastCoinStakeSearchInterval && nWeight;
        int nExpectedTime = staking ? (nTargetSpacing * nNetworkWeight / nWeight) : -1;

        ui->stakingLabel->setText(staking ? "Enabled" : "Disabled");
        if(pindexBest)
            ui->difficultyLabel->setText(QString::number(GetDifficulty(GetLastBlockIndex(pindexBest, true))));
        ui->weightLabel->setText(QString::number(nWeight));
        ui->netWeightLabel->setText(QString::number(nNetworkWeight));
        ui->timeToStakeLabel->setText(QString::number(nExpectedTime) + " secs");
    }

    //qDebug() << "Stake blocks processed:";
    //qDebug() << i;
    ui->customPlot->clearPlottables();
    ui->customPlot->clearGraphs();
    ui->customPlot->clearItems();
    ui->customPlot->addGraph();
    ui->customPlot->graph(0)->setPen(QPen(QColor(206, 206, 206))); // line color green for first graph
    ui->customPlot->graph(0)->setBrush(QBrush(QColor(206, 206, 206, 20))); // first graph will be filled with translucent green
    ui->customPlot->addGraph();
    ui->customPlot->graph(1)->setPen(QPen(QColor(76, 255, 0))); // line color red for second graph
    ui->customPlot->graph(1)->setBrush(QBrush(QColor(76, 255, 0, 20)));

    if(ui->networkCheckBox->isChecked())
        ui->customPlot->graph(0)->setData(nTimeData, netStakeData);
    ui->customPlot->graph(1)->setData(nTimeData, myStakeData);
    //ui->customPlot->xAxis->setRangeLower(nTimeData.first());
    //ui->customPlot->xAxis->setRangeUpper(nTimeData.last());

    QLinearGradient plotGradient;
//.........这里部分代码省略.........

//.........这里部分代码省略.........
            else
            {
                if (fPrintToConsole)
                    (void)printf( 
                            "Error? a extra genesis block with the wrong hash???"
                            "\n"
                            ""
                                );
            }
        }
        // there seem to be 2 errant blocks?
        else
        {
            if(
                (NULL != pindexGenesisBlock) && 
                (0 == diskindex.nHeight) 
              )
            {
                if (fPrintToConsole)
                    (void)printf( 
                            "Error? a extra genesis null block???"
                            "\n"
                            ""
                                );
            }
        }
        //if (!pindexNew->CheckIndex()) // as it stands, this never fails??? So why bother?????
        //{
        //    delete iterator;
        //    return error("LoadBlockIndex() : CheckIndex failed at %d", pindexNew->nHeight);
        //}

        // NovaCoin: build setStakeSeen
        if (pindexNew->IsProofOfStake())
            setStakeSeen.insert(make_pair(pindexNew->prevoutStake, pindexNew->nStakeTime));
#ifdef WIN32
        ++nCounter;
        // could "guess at the max nHeight & %age against the loop count
        // to "hone in on" the %age done.  
        // Towards the end it ought to be pretty accurate.
        if( nMaxHeightGuess < pindexNew->nHeight )
        {
            nMaxHeightGuess = pindexNew->nHeight;
        }
        if( 0 == ( nCounter % nRefresh ) )  // every nRefresh-th time through the loop
        {
            float                   // these #s are just to slosh the . around
                dEstimate = float( ( 100.0 * nCounter ) / nMaxHeightGuess );
            std::string 
                sGutsNoise = strprintf(
                            "%7d (%3.2f%%)"
                            "",
                            nCounter, //pindexNew->nHeight,
                            dEstimate > 100.0? 100.0: dEstimate
                                      );
            if (fPrintToConsole)
            {
                /****************
                (void)printf( 
                            "%s"
                            "   "
                            "",
                            sGutsNoise.c_str()
                            );
                ****************/
                DoProgress( nCounter, nMaxHeightGuess, n64MsStartTime );