#include "alert.h"
#include "checkpoints.h"
#include "db.h"
+#include "txdb.h"
#include "net.h"
#include "init.h"
#include "ui_interface.h"
+#include "checkqueue.h"
#include "kernel.h"
-#include "scrypt_mine.h"
+#include "zerocoin/Zerocoin.h"
#include <boost/algorithm/string/replace.hpp>
#include <boost/filesystem.hpp>
#include <boost/filesystem/fstream.hpp>
+
using namespace std;
using namespace boost;
map<uint256, CBlockIndex*> mapBlockIndex;
set<pair<COutPoint, unsigned int> > setStakeSeen;
+libzerocoin::Params* ZCParams;
CBigNum bnProofOfWorkLimit(~uint256(0) >> 20); // "standard" scrypt target limit for proof of work, results with 0,000244140625 proof-of-work difficulty
CBigNum bnProofOfStakeLegacyLimit(~uint256(0) >> 24); // proof of stake target limit from block #15000 and until 20 June 2013, results with 0,00390625 proof of stake difficulty
CBigNum bnProofOfStakeLimit(~uint256(0) >> 27); // proof of stake target limit since 20 June 2013, equal to 0.03125 proof of stake difficulty
CBigNum bnProofOfStakeHardLimit(~uint256(0) >> 30); // disabled temporarily, will be used in the future to fix minimal proof of stake difficulty at 0.25
-CBigNum bnPoWBase = CBigNum(uint256("0x00000000ffff0000000000000000000000000000000000000000000000000000")); // difficulty-1 target
+uint256 nPoWBase = uint256("0x00000000ffff0000000000000000000000000000000000000000000000000000"); // difficulty-1 target
CBigNum bnProofOfWorkLimitTestNet(~uint256(0) >> 16);
-unsigned int nStakeMinAge = 60 * 60 * 24 * 30; // 30 days as minimum age for coin age
-unsigned int nStakeMaxAge = 60 * 60 * 24 * 90; // 90 days as stake age of full weight
+unsigned int nStakeMinAge = 60 * 60 * 24 * 30; // 30 days as zero time weight
+unsigned int nStakeMaxAge = 60 * 60 * 24 * 90; // 90 days as full weight
unsigned int nStakeTargetSpacing = 10 * 60; // 10-minute stakes spacing
unsigned int nModifierInterval = 6 * 60 * 60; // time to elapse before new modifier is computed
int nCoinbaseMaturity = 500;
CBlockIndex* pindexGenesisBlock = NULL;
int nBestHeight = -1;
-CBigNum bnBestChainTrust = 0;
-CBigNum bnBestInvalidTrust = 0;
+
+uint256 nBestChainTrust = 0;
+uint256 nBestInvalidTrust = 0;
+
uint256 hashBestChain = 0;
CBlockIndex* pindexBest = NULL;
int64 nTimeBestReceived = 0;
+int nScriptCheckThreads = 0;
CMedianFilter<int> cPeerBlockCounts(5, 0); // Amount of blocks that other nodes claim to have
set<pair<COutPoint, unsigned int> > setStakeSeenOrphan;
map<uint256, uint256> mapProofOfStake;
-map<uint256, CDataStream*> mapOrphanTransactions;
-map<uint256, map<uint256, CDataStream*> > mapOrphanTransactionsByPrev;
+map<uint256, CTransaction> mapOrphanTransactions;
+map<uint256, set<uint256> > mapOrphanTransactionsByPrev;
// Constant stuff for coinbase transactions we create:
CScript COINBASE_FLAGS;
const string strMessageMagic = "NovaCoin Signed Message:\n";
-double dHashesPerSec;
-int64 nHPSTimerStart;
-
// Settings
int64 nTransactionFee = MIN_TX_FEE;
+int64 nMinimumInputValue = MIN_TX_FEE;
+extern enum Checkpoints::CPMode CheckpointsMode;
//////////////////////////////////////////////////////////////////////////////
//
// mapOrphanTransactions
//
-bool AddOrphanTx(const CDataStream& vMsg)
+bool AddOrphanTx(const CTransaction& tx)
{
- CTransaction tx;
- CDataStream(vMsg) >> tx;
uint256 hash = tx.GetHash();
if (mapOrphanTransactions.count(hash))
return false;
- CDataStream* pvMsg = new CDataStream(vMsg);
-
// Ignore big transactions, to avoid a
// send-big-orphans memory exhaustion attack. If a peer has a legitimate
// large transaction with a missing parent then we assume
// have been mined or received.
// 10,000 orphans, each of which is at most 5,000 bytes big is
// at most 500 megabytes of orphans:
- if (pvMsg->size() > 5000)
+
+ size_t nSize = tx.GetSerializeSize(SER_NETWORK, CTransaction::CURRENT_VERSION);
+
+ if (nSize > 5000)
{
- printf("ignoring large orphan tx (size: %"PRIszu", hash: %s)\n", pvMsg->size(), hash.ToString().substr(0,10).c_str());
- delete pvMsg;
+ printf("ignoring large orphan tx (size: %"PRIszu", hash: %s)\n", nSize, hash.ToString().substr(0,10).c_str());
return false;
}
- mapOrphanTransactions[hash] = pvMsg;
+ mapOrphanTransactions[hash] = tx;
BOOST_FOREACH(const CTxIn& txin, tx.vin)
- mapOrphanTransactionsByPrev[txin.prevout.hash].insert(make_pair(hash, pvMsg));
+ mapOrphanTransactionsByPrev[txin.prevout.hash].insert(hash);
printf("stored orphan tx %s (mapsz %"PRIszu")\n", hash.ToString().substr(0,10).c_str(),
mapOrphanTransactions.size());
{
if (!mapOrphanTransactions.count(hash))
return;
- const CDataStream* pvMsg = mapOrphanTransactions[hash];
- CTransaction tx;
- CDataStream(*pvMsg) >> tx;
+ const CTransaction& tx = mapOrphanTransactions[hash];
BOOST_FOREACH(const CTxIn& txin, tx.vin)
{
mapOrphanTransactionsByPrev[txin.prevout.hash].erase(hash);
if (mapOrphanTransactionsByPrev[txin.prevout.hash].empty())
mapOrphanTransactionsByPrev.erase(txin.prevout.hash);
}
- delete pvMsg;
mapOrphanTransactions.erase(hash);
}
{
// Evict a random orphan:
uint256 randomhash = GetRandHash();
- map<uint256, CDataStream*>::iterator it = mapOrphanTransactions.lower_bound(randomhash);
+ map<uint256, CTransaction>::iterator it = mapOrphanTransactions.lower_bound(randomhash);
if (it == mapOrphanTransactions.end())
it = mapOrphanTransactions.begin();
EraseOrphanTx(it->first);
if (nVersion > CTransaction::CURRENT_VERSION)
return false;
+ unsigned int nDataOut = 0;
+ txnouttype whichType;
BOOST_FOREACH(const CTxIn& txin, vin)
{
// Biggest 'standard' txin is a 3-signature 3-of-3 CHECKMULTISIG
return false;
if (!txin.scriptSig.IsPushOnly())
return false;
+ if (!txin.scriptSig.HasCanonicalPushes()) {
+ return false;
+ }
}
BOOST_FOREACH(const CTxOut& txout, vout) {
- if (!::IsStandard(txout.scriptPubKey))
- return false;
- if (txout.nValue == 0)
+ if (!::IsStandard(txout.scriptPubKey, whichType)) {
return false;
+ }
+ if (whichType == TX_NULL_DATA)
+ nDataOut++;
+ else {
+ if (txout.nValue == 0) {
+ return false;
+ }
+ if (!txout.scriptPubKey.HasCanonicalPushes()) {
+ return false;
+ }
+ }
+ }
+
+ // only one OP_RETURN txout is permitted
+ if (nDataOut > 1) {
+ return false;
}
+
return true;
}
// beside "push data" in the scriptSig the
// IsStandard() call returns false
vector<vector<unsigned char> > stack;
- if (!EvalScript(stack, vin[i].scriptSig, *this, i, 0))
+ if (!EvalScript(stack, vin[i].scriptSig, *this, i, false, 0))
return false;
if (whichType == TX_SCRIPTHASH)
if (txout.IsEmpty() && !IsCoinBase() && !IsCoinStake())
return DoS(100, error("CTransaction::CheckTransaction() : txout empty for user transaction"));
- // NovaCoin: enforce minimum output amount for user transactions
- // (and for all transactions until 20 Sep 2013)
- if ((!IsCoinBase() || nTime < CHAINCHECKS_SWITCH_TIME)
- && (!txout.IsEmpty()) && txout.nValue < MIN_TXOUT_AMOUNT)
- return DoS(100, error("CTransaction::CheckTransaction() : txout.nValue below minimum"));
-
+ if (txout.nValue < 0)
+ return DoS(100, error("CTransaction::CheckTransaction() : txout.nValue is negative"));
if (txout.nValue > MAX_MONEY)
return DoS(100, error("CTransaction::CheckTransaction() : txout.nValue too high"));
nValueOut += txout.nValue;
return true;
}
-int64 CTransaction::GetMinFee(unsigned int nBlockSize, bool fAllowFree,
- enum GetMinFee_mode mode) const
+int64 CTransaction::GetMinFee(unsigned int nBlockSize, bool fAllowFree, enum GetMinFee_mode mode, unsigned int nBytes) const
{
- // Base fee is either MIN_TX_FEE or MIN_RELAY_TX_FEE
- int64 nBaseFee = (mode == GMF_RELAY) ? MIN_RELAY_TX_FEE : MIN_TX_FEE;
+ // Use new fees approach if we are on test network or
+ // switch date has been reached
+ bool fNewApproach = fTestNet || nTime > FEE_SWITCH_TIME;
+
+ int64 nMinTxFee = MIN_TX_FEE, nMinRelayTxFee = MIN_RELAY_TX_FEE;
+
+ if(!fNewApproach || IsCoinStake())
+ {
+ // Enforce 0.01 as minimum fee for old approach or coinstake
+ nMinTxFee = CENT;
+ nMinRelayTxFee = CENT;
+ }
+
+ // Base fee is either nMinTxFee or nMinRelayTxFee
+ int64 nBaseFee = (mode == GMF_RELAY) ? nMinRelayTxFee : nMinTxFee;
- unsigned int nBytes = ::GetSerializeSize(*this, SER_NETWORK, PROTOCOL_VERSION);
unsigned int nNewBlockSize = nBlockSize + nBytes;
int64 nMinFee = (1 + (int64)nBytes / 1000) * nBaseFee;
- // To limit dust spam, require MIN_TX_FEE/MIN_RELAY_TX_FEE if any output is less than 0.01
- if (nMinFee < nBaseFee)
+ if (fNewApproach)
+ {
+ if (fAllowFree)
+ {
+ if (nBlockSize == 1)
+ {
+ // Transactions under 1K are free
+ if (nBytes < 1000)
+ nMinFee = 0;
+ }
+ else
+ {
+ // Free transaction area
+ if (nNewBlockSize < 27000)
+ nMinFee = 0;
+ }
+ }
+
+ // To limit dust spam, require additional MIN_TX_FEE/MIN_RELAY_TX_FEE for
+ // each non empty output which is less than 0.01
+ //
+ // It's safe to ignore empty outputs here, because these inputs are allowed
+ // only for coinbase and coinstake transactions.
+ BOOST_FOREACH(const CTxOut& txout, vout)
+ if (txout.nValue < CENT && !txout.IsEmpty())
+ nMinFee += nBaseFee;
+ }
+ else if (nMinFee < nBaseFee)
{
+ // To limit dust spam, require MIN_TX_FEE/MIN_RELAY_TX_FEE if
+ // any output is less than 0.01
BOOST_FOREACH(const CTxOut& txout, vout)
if (txout.nValue < CENT)
nMinFee = nBaseFee;
if (!MoneyRange(nMinFee))
nMinFee = MAX_MONEY;
+
return nMinFee;
}
unsigned int nSize = ::GetSerializeSize(tx, SER_NETWORK, PROTOCOL_VERSION);
// Don't accept it if it can't get into a block
- int64 txMinFee = tx.GetMinFee(1000, false, GMF_RELAY);
+ int64 txMinFee = tx.GetMinFee(1000, true, GMF_RELAY, nSize);
if (nFees < txMinFee)
return error("CTxMemPool::accept() : not enough fees %s, %"PRI64d" < %"PRI64d,
hash.ToString().c_str(),
// Check against previous transactions
// This is done last to help prevent CPU exhaustion denial-of-service attacks.
- if (!tx.ConnectInputs(txdb, mapInputs, mapUnused, CDiskTxPos(1,1,1), pindexBest, false, false))
+ if (!tx.ConnectInputs(txdb, mapInputs, mapUnused, CDiskTxPos(1,1,1), pindexBest, false, false, true, SIG_SWITCH_TIME < tx.nTime ? STRICT_FLAGS : SOFT_FLAGS))
{
return error("CTxMemPool::accept() : ConnectInputs failed %s", hash.ToString().substr(0,10).c_str());
}
}
// miner's coin base reward based on nBits
-int64 GetProofOfWorkReward(unsigned int nBits)
+int64 GetProofOfWorkReward(unsigned int nBits, int64 nFees)
{
CBigNum bnSubsidyLimit = MAX_MINT_PROOF_OF_WORK;
if (fDebug && GetBoolArg("-printcreation"))
printf("GetProofOfWorkReward() : create=%s nBits=0x%08x nSubsidy=%"PRI64d"\n", FormatMoney(nSubsidy).c_str(), nBits, nSubsidy);
- return min(nSubsidy, MAX_MINT_PROOF_OF_WORK);
+ return min(nSubsidy, MAX_MINT_PROOF_OF_WORK) + nFees;
}
// miner's coin stake reward based on nBits and coin age spent (coin-days)
int64 GetProofOfStakeReward(int64 nCoinAge, unsigned int nBits, unsigned int nTime, bool bCoinYearOnly)
{
- int64 nRewardCoinYear, nSubsidy;
+ int64 nRewardCoinYear, nSubsidy, nSubsidyLimit = 10 * COIN;
if(fTestNet || nTime > STAKE_SWITCH_TIME)
{
CBigNum bnTargetLimit = GetProofOfStakeLimit(0, nTime);
bnTargetLimit.SetCompact(bnTargetLimit.GetCompact());
- // NovaCoin: reward for coin-year is cut in half every 64x multiply of PoS difficulty
- // A reasonably continuous curve is used to avoid shock to market
- // (nRewardCoinYearLimit / nRewardCoinYear) ** 6 == bnProofOfStakeLimit / bnTarget
- //
- // Human readable form:
- //
- // nRewardCoinYear = 1 / (posdiff ^ 1/6)
+ // NovaCoin: A reasonably continuous curve is used to avoid shock to market
+
+ CBigNum bnLowerBound = 1 * CENT, // Lower interest bound is 1% per year
+ bnUpperBound = bnRewardCoinYearLimit, // Upper interest bound is 100% per year
+ bnMidPart, bnRewardPart;
- CBigNum bnLowerBound = 1 * CENT; // Lower interest bound is 1% per year
- CBigNum bnUpperBound = bnRewardCoinYearLimit;
while (bnLowerBound + CENT <= bnUpperBound)
{
CBigNum bnMidValue = (bnLowerBound + bnUpperBound) / 2;
if (fDebug && GetBoolArg("-printcreation"))
printf("GetProofOfStakeReward() : lower=%"PRI64d" upper=%"PRI64d" mid=%"PRI64d"\n", bnLowerBound.getuint64(), bnUpperBound.getuint64(), bnMidValue.getuint64());
- if (bnMidValue * bnMidValue * bnMidValue * bnMidValue * bnMidValue * bnMidValue * bnTargetLimit > bnRewardCoinYearLimit * bnRewardCoinYearLimit * bnRewardCoinYearLimit * bnRewardCoinYearLimit * bnRewardCoinYearLimit * bnRewardCoinYearLimit * bnTarget)
+
+ if(!fTestNet && nTime < STAKECURVE_SWITCH_TIME)
+ {
+ //
+ // Until 20 Oct 2013: reward for coin-year is cut in half every 64x multiply of PoS difficulty
+ //
+ // (nRewardCoinYearLimit / nRewardCoinYear) ** 6 == bnProofOfStakeLimit / bnTarget
+ //
+ // Human readable form: nRewardCoinYear = 1 / (posdiff ^ 1/6)
+ //
+
+ bnMidPart = bnMidValue * bnMidValue * bnMidValue * bnMidValue * bnMidValue * bnMidValue;
+ bnRewardPart = bnRewardCoinYearLimit * bnRewardCoinYearLimit * bnRewardCoinYearLimit * bnRewardCoinYearLimit * bnRewardCoinYearLimit * bnRewardCoinYearLimit;
+ }
+ else
+ {
+ //
+ // Since 20 Oct 2013: reward for coin-year is cut in half every 8x multiply of PoS difficulty
+ //
+ // (nRewardCoinYearLimit / nRewardCoinYear) ** 3 == bnProofOfStakeLimit / bnTarget
+ //
+ // Human readable form: nRewardCoinYear = 1 / (posdiff ^ 1/3)
+ //
+
+ bnMidPart = bnMidValue * bnMidValue * bnMidValue;
+ bnRewardPart = bnRewardCoinYearLimit * bnRewardCoinYearLimit * bnRewardCoinYearLimit;
+ }
+
+ if (bnMidPart * bnTargetLimit > bnRewardPart * bnTarget)
bnUpperBound = bnMidValue;
else
bnLowerBound = bnMidValue;
if(bCoinYearOnly)
return nRewardCoinYear;
- // Fix problem with proof-of-stake rewards calculation since 20 Sep 2013
- if(nTime < CHAINCHECKS_SWITCH_TIME)
- nSubsidy = nCoinAge * 33 / (365 * 33 + 8) * nRewardCoinYear;
- else
- nSubsidy = nCoinAge * nRewardCoinYear * 33 / (365 * 33 + 8);
+ nSubsidy = nCoinAge * nRewardCoinYear * 33 / (365 * 33 + 8);
+
+ // Set reasonable reward limit for large inputs since 20 Oct 2013
+ //
+ // This will stimulate large holders to use smaller inputs, that's good for the network protection
+ if(fTestNet || STAKECURVE_SWITCH_TIME < nTime)
+ {
+ if (fDebug && GetBoolArg("-printcreation") && nSubsidyLimit < nSubsidy)
+ printf("GetProofOfStakeReward(): %s is greater than %s, coinstake reward will be truncated\n", FormatMoney(nSubsidy).c_str(), FormatMoney(nSubsidyLimit).c_str());
+
+ nSubsidy = min(nSubsidy, nSubsidyLimit);
+ }
if (fDebug && GetBoolArg("-printcreation"))
printf("GetProofOfStakeReward(): create=%s nCoinAge=%"PRI64d" nBits=%d\n", FormatMoney(nSubsidy).c_str(), nCoinAge, nBits);
}
//
-// minimum amount of work that could possibly be required nTime after
-// minimum work required was nBase
+// maximum nBits value could possible be required nTime after
//
-unsigned int ComputeMinWork(unsigned int nBase, int64 nTime)
+unsigned int ComputeMaxBits(CBigNum bnTargetLimit, unsigned int nBase, int64 nTime)
{
- CBigNum bnTargetLimit = bnProofOfWorkLimit;
-
CBigNum bnResult;
bnResult.SetCompact(nBase);
bnResult *= 2;
return bnResult.GetCompact();
}
+//
+// minimum amount of work that could possibly be required nTime after
+// minimum proof-of-work required was nBase
+//
+unsigned int ComputeMinWork(unsigned int nBase, int64 nTime)
+{
+ return ComputeMaxBits(bnProofOfWorkLimit, nBase, nTime);
+}
+
+//
+// minimum amount of stake that could possibly be required nTime after
+// minimum proof-of-stake required was nBase
+//
+unsigned int ComputeMinStake(unsigned int nBase, int64 nTime, unsigned int nBlockTime)
+{
+ return ComputeMaxBits(GetProofOfStakeLimit(0, nBlockTime), nBase, nTime);
+}
+
+
// ppcoin: find last block index up to pindex
const CBlockIndex* GetLastBlockIndex(const CBlockIndex* pindex, bool fProofOfStake)
{
void static InvalidChainFound(CBlockIndex* pindexNew)
{
- if (pindexNew->bnChainTrust > bnBestInvalidTrust)
+ if (pindexNew->nChainTrust > nBestInvalidTrust)
{
- bnBestInvalidTrust = pindexNew->bnChainTrust;
- CTxDB().WriteBestInvalidTrust(bnBestInvalidTrust);
+ nBestInvalidTrust = pindexNew->nChainTrust;
+ CTxDB().WriteBestInvalidTrust(CBigNum(nBestInvalidTrust));
uiInterface.NotifyBlocksChanged();
}
- CBigNum bnBestInvalidBlockTrust = pindexNew->bnChainTrust - pindexNew->pprev->bnChainTrust;
- CBigNum bnBestBlockTrust = pindexBest->nHeight != 0 ? (pindexBest->bnChainTrust - pindexBest->pprev->bnChainTrust) : pindexBest->bnChainTrust;
+ uint256 nBestInvalidBlockTrust = pindexNew->nChainTrust - pindexNew->pprev->nChainTrust;
+ uint256 nBestBlockTrust = pindexBest->nHeight != 0 ? (pindexBest->nChainTrust - pindexBest->pprev->nChainTrust) : pindexBest->nChainTrust;
- printf("InvalidChainFound: invalid block=%s height=%d trust=%s blocktrust=%s date=%s\n",
+ printf("InvalidChainFound: invalid block=%s height=%d trust=%s blocktrust=%"PRI64d" date=%s\n",
pindexNew->GetBlockHash().ToString().substr(0,20).c_str(), pindexNew->nHeight,
- pindexNew->bnChainTrust.ToString().c_str(), bnBestInvalidBlockTrust.ToString().c_str(),
+ CBigNum(pindexNew->nChainTrust).ToString().c_str(), nBestInvalidBlockTrust.Get64(),
DateTimeStrFormat("%x %H:%M:%S", pindexNew->GetBlockTime()).c_str());
- printf("InvalidChainFound: current best=%s height=%d trust=%s blocktrust=%s date=%s\n",
- hashBestChain.ToString().substr(0,20).c_str(), nBestHeight,
- bnBestChainTrust.ToString().c_str(),
- bnBestBlockTrust.ToString().c_str(),
+ printf("InvalidChainFound: current best=%s height=%d trust=%s blocktrust=%"PRI64d" date=%s\n",
+ hashBestChain.ToString().substr(0,20).c_str(), nBestHeight,
+ CBigNum(pindexBest->nChainTrust).ToString().c_str(),
+ nBestBlockTrust.Get64(),
DateTimeStrFormat("%x %H:%M:%S", pindexBest->GetBlockTime()).c_str());
}
return nSigOps;
}
-bool CTransaction::ConnectInputs(CTxDB& txdb, MapPrevTx inputs,
- map<uint256, CTxIndex>& mapTestPool, const CDiskTxPos& posThisTx,
- const CBlockIndex* pindexBlock, bool fBlock, bool fMiner, bool fStrictPayToScriptHash)
+bool CScriptCheck::operator()() const {
+ const CScript &scriptSig = ptxTo->vin[nIn].scriptSig;
+ if (!VerifyScript(scriptSig, scriptPubKey, *ptxTo, nIn, nFlags, nHashType))
+ return error("CScriptCheck() : %s VerifySignature failed", ptxTo->GetHash().ToString().substr(0,10).c_str());
+ return true;
+}
+
+bool VerifySignature(const CTransaction& txFrom, const CTransaction& txTo, unsigned int nIn, unsigned int flags, int nHashType)
+{
+ return CScriptCheck(txFrom, txTo, nIn, flags, nHashType)();
+}
+
+bool CTransaction::ConnectInputs(CTxDB& txdb, MapPrevTx inputs, map<uint256, CTxIndex>& mapTestPool, const CDiskTxPos& posThisTx,
+ const CBlockIndex* pindexBlock, bool fBlock, bool fMiner, bool fScriptChecks, unsigned int flags, std::vector<CScriptCheck> *pvChecks)
{
// Take over previous transactions' spent pointers
// fBlock is true when this is called from AcceptBlock when a new best-block is added to the blockchain
// fMiner is true when called from the internal bitcoin miner
// ... both are false when called from CTransaction::AcceptToMemoryPool
+
if (!IsCoinBase())
{
int64 nValueIn = 0;
return DoS(100, error("ConnectInputs() : txin values out of range"));
}
+
+ if (pvChecks)
+ pvChecks->reserve(vin.size());
+
// The first loop above does all the inexpensive checks.
// Only if ALL inputs pass do we perform expensive ECDSA signature checks.
// Helps prevent CPU exhaustion attacks.
// Skip ECDSA signature verification when connecting blocks (fBlock=true)
// before the last blockchain checkpoint. This is safe because block merkle hashes are
// still computed and checked, and any change will be caught at the next checkpoint.
- if (!(fBlock && (nBestHeight < Checkpoints::GetTotalBlocksEstimate())))
+ if (fScriptChecks)
{
// Verify signature
- if (!VerifySignature(txPrev, *this, i, fStrictPayToScriptHash, 0))
+ CScriptCheck check(txPrev, *this, i, flags, 0);
+ if (pvChecks)
{
- // only during transition phase for P2SH: do not invoke anti-DoS code for
- // potentially old clients relaying bad P2SH transactions
- if (fStrictPayToScriptHash && VerifySignature(txPrev, *this, i, false, 0))
- return error("ConnectInputs() : %s P2SH VerifySignature failed", GetHash().ToString().substr(0,10).c_str());
-
+ pvChecks->push_back(CScriptCheck());
+ check.swap(pvChecks->back());
+ }
+ else if (!check())
+ {
+ if (flags & STRICT_FLAGS)
+ {
+ // Don't trigger DoS code in case of STRICT_FLAGS caused failure.
+ CScriptCheck check(txPrev, *this, i, flags & ~STRICT_FLAGS, 0);
+ if (check())
+ return error("ConnectInputs() : %s strict VerifySignature failed", GetHash().ToString().substr(0,10).c_str());
+ }
return DoS(100,error("ConnectInputs() : %s VerifySignature failed", GetHash().ToString().substr(0,10).c_str()));
}
}
uint64 nCoinAge;
if (!GetCoinAge(txdb, nCoinAge))
return error("ConnectInputs() : %s unable to get coin age for coinstake", GetHash().ToString().substr(0,10).c_str());
- int64 nStakeReward = GetValueOut() - nValueIn;
- if (nStakeReward > GetProofOfStakeReward(nCoinAge, pindexBlock->nBits, nTime) - GetMinFee() + MIN_TX_FEE)
- return DoS(100, error("ConnectInputs() : %s stake reward exceeded", GetHash().ToString().substr(0,10).c_str()));
+
+ unsigned int nTxSize = (nTime > VALIDATION_SWITCH_TIME || fTestNet) ? GetSerializeSize(SER_NETWORK, PROTOCOL_VERSION) : 0;
+
+ int64 nReward = GetValueOut() - nValueIn;
+ int64 nCalculatedReward = GetProofOfStakeReward(nCoinAge, pindexBlock->nBits, nTime) - GetMinFee(1, false, GMF_BLOCK, nTxSize) + CENT;
+
+ if (nReward > nCalculatedReward)
+ return DoS(100, error("ConnectInputs() : coinstake pays too much(actual=%"PRI64d" vs calculated=%"PRI64d")", nReward, nCalculatedReward));
}
else
{
int64 nTxFee = nValueIn - GetValueOut();
if (nTxFee < 0)
return DoS(100, error("ConnectInputs() : %s nTxFee < 0", GetHash().ToString().substr(0,10).c_str()));
- // ppcoin: enforce transaction fees for every block
- if (nTxFee < GetMinFee())
- return fBlock? DoS(100, error("ConnectInputs() : %s not paying required fee=%s, paid=%s", GetHash().ToString().substr(0,10).c_str(), FormatMoney(GetMinFee()).c_str(), FormatMoney(nTxFee).c_str())) : false;
nFees += nTxFee;
if (!MoneyRange(nFees))
return false;
// Verify signature
- if (!VerifySignature(txPrev, *this, i, true, 0))
- return error("ConnectInputs() : VerifySignature failed");
+ if (!VerifySignature(txPrev, *this, i, SCRIPT_VERIFY_NOCACHE | SCRIPT_VERIFY_P2SH, 0))
+ return error("ClientConnectInputs() : VerifySignature failed");
///// this is redundant with the mempool.mapNextTx stuff,
///// not sure which I want to get rid of
return true;
}
+static CCheckQueue<CScriptCheck> scriptcheckqueue(128);
+
+void ThreadScriptCheck(void*) {
+ vnThreadsRunning[THREAD_SCRIPTCHECK]++;
+ RenameThread("novacoin-scriptch");
+ scriptcheckqueue.Thread();
+ vnThreadsRunning[THREAD_SCRIPTCHECK]--;
+}
+
+void ThreadScriptCheckQuit() {
+ scriptcheckqueue.Quit();
+}
+
bool CBlock::ConnectBlock(CTxDB& txdb, CBlockIndex* pindex, bool fJustCheck)
{
- // Check it again in case a previous version let a bad block in
- if (!CheckBlock(!fJustCheck, !fJustCheck))
+ // Check it again in case a previous version let a bad block in, but skip BlockSig checking
+ if (!CheckBlock(!fJustCheck, !fJustCheck, false))
return false;
+ bool fProtocol048 = fTestNet || VALIDATION_SWITCH_TIME < nTime;
+
// Do not allow blocks that contain transactions which 'overwrite' older transactions,
// unless those are already completely spent.
// If such overwrites are allowed, coinbases and transactions depending upon those
// two in the chain that violate it. This prevents exploiting the issue against nodes in their
// initial block download.
bool fEnforceBIP30 = true; // Always active in NovaCoin
- bool fStrictPayToScriptHash = true; // Always active in NovaCoin
+ bool fScriptChecks = pindex->nHeight >= Checkpoints::GetTotalBlocksEstimate();
//// issue here: it doesn't know the version
unsigned int nTxPos;
nTxPos = pindex->nBlockPos + ::GetSerializeSize(CBlock(), SER_DISK, CLIENT_VERSION) - (2 * GetSizeOfCompactSize(0)) + GetSizeOfCompactSize(vtx.size());
map<uint256, CTxIndex> mapQueuedChanges;
+ CCheckQueueControl<CScriptCheck> control(fScriptChecks && nScriptCheckThreads ? &scriptcheckqueue : NULL);
+
int64 nFees = 0;
int64 nValueIn = 0;
int64 nValueOut = 0;
if (!tx.FetchInputs(txdb, mapQueuedChanges, true, false, mapInputs, fInvalid))
return false;
- if (fStrictPayToScriptHash)
- {
- // Add in sigops done by pay-to-script-hash inputs;
- // this is to prevent a "rogue miner" from creating
- // an incredibly-expensive-to-validate block.
- nSigOps += tx.GetP2SHSigOpCount(mapInputs);
- if (nSigOps > MAX_BLOCK_SIGOPS)
- return DoS(100, error("ConnectBlock() : too many sigops"));
- }
+ // Add in sigops done by pay-to-script-hash inputs;
+ // this is to prevent a "rogue miner" from creating
+ // an incredibly-expensive-to-validate block.
+ nSigOps += tx.GetP2SHSigOpCount(mapInputs);
+ if (nSigOps > MAX_BLOCK_SIGOPS)
+ return DoS(100, error("ConnectBlock() : too many sigops"));
int64 nTxValueIn = tx.GetValueIn(mapInputs);
int64 nTxValueOut = tx.GetValueOut();
if (!tx.IsCoinStake())
nFees += nTxValueIn - nTxValueOut;
- if (!tx.ConnectInputs(txdb, mapInputs, mapQueuedChanges, posThisTx, pindex, true, false, fStrictPayToScriptHash))
+ std::vector<CScriptCheck> vChecks;
+ if (!tx.ConnectInputs(txdb, mapInputs, mapQueuedChanges, posThisTx, pindex, true, false, fScriptChecks, SCRIPT_VERIFY_NOCACHE | SCRIPT_VERIFY_P2SH, nScriptCheckThreads ? &vChecks : NULL))
return false;
+ control.Add(vChecks);
}
mapQueuedChanges[hashTx] = CTxIndex(posThisTx, tx.vout.size());
}
- // ppcoin: track money supply and mint amount info
+ if (!control.Wait())
+ return DoS(100, false);
+
+ if (IsProofOfWork())
+ {
+ int64 nBlockReward = GetProofOfWorkReward(nBits, fProtocol048 ? nFees : 0);
+
+ // Check coinbase reward
+ if (vtx[0].GetValueOut() > nBlockReward)
+ return error("CheckBlock() : coinbase reward exceeded (actual=%"PRI64d" vs calculated=%"PRI64d")",
+ vtx[0].GetValueOut(),
+ nBlockReward);
+ }
+
+ // track money supply and mint amount info
pindex->nMint = nValueOut - nValueIn + nFees;
pindex->nMoneySupply = (pindex->pprev? pindex->pprev->nMoneySupply : 0) + nValueOut - nValueIn;
if (!txdb.WriteBlockIndex(CDiskBlockIndex(pindex)))
return error("Connect() : WriteBlockIndex for pindex failed");
- // ppcoin: fees are not collected by miners as in bitcoin
- // ppcoin: fees are destroyed to compensate the entire network
- if (fDebug && GetBoolArg("-printcreation"))
+ // fees are not collected by proof-of-stake miners
+ // fees are destroyed to compensate the entire network
+ if (fProtocol048 && fDebug && IsProofOfStake() && GetBoolArg("-printcreation"))
printf("ConnectBlock() : destroy=%s nFees=%"PRI64d"\n", FormatMoney(nFees).c_str(), nFees);
if (fJustCheck)
// Reorganize is costly in terms of db load, as it works in a single db transaction.
// Try to limit how much needs to be done inside
- while (pindexIntermediate->pprev && pindexIntermediate->pprev->bnChainTrust > pindexBest->bnChainTrust)
+ while (pindexIntermediate->pprev && pindexIntermediate->pprev->nChainTrust > pindexBest->nChainTrust)
{
vpindexSecondary.push_back(pindexIntermediate);
pindexIntermediate = pindexIntermediate->pprev;
pindexBest = pindexNew;
pblockindexFBBHLast = NULL;
nBestHeight = pindexBest->nHeight;
- bnBestChainTrust = pindexNew->bnChainTrust;
+ nBestChainTrust = pindexNew->nChainTrust;
nTimeBestReceived = GetTime();
nTransactionsUpdated++;
- CBigNum bnBestBlockTrust = pindexBest->nHeight != 0 ? (pindexBest->bnChainTrust - pindexBest->pprev->bnChainTrust) : pindexBest->bnChainTrust;
+ uint256 nBestBlockTrust = pindexBest->nHeight != 0 ? (pindexBest->nChainTrust - pindexBest->pprev->nChainTrust) : pindexBest->nChainTrust;
- printf("SetBestChain: new best=%s height=%d trust=%s blocktrust=%s date=%s\n",
- hashBestChain.ToString().substr(0,20).c_str(), nBestHeight, bnBestChainTrust.ToString().c_str(),
- bnBestBlockTrust.ToString().c_str(),
+ printf("SetBestChain: new best=%s height=%d trust=%s blocktrust=%"PRI64d" date=%s\n",
+ hashBestChain.ToString().substr(0,20).c_str(), nBestHeight,
+ CBigNum(nBestChainTrust).ToString().c_str(),
+ nBestBlockTrust.Get64(),
DateTimeStrFormat("%x %H:%M:%S", pindexBest->GetBlockTime()).c_str());
// Check the version of the last 100 blocks to see if we need to upgrade:
}
// ppcoin: compute chain trust score
- pindexNew->bnChainTrust = (pindexNew->pprev ? pindexNew->pprev->bnChainTrust : 0) + pindexNew->GetBlockTrust();
+ pindexNew->nChainTrust = (pindexNew->pprev ? pindexNew->pprev->nChainTrust : 0) + pindexNew->GetBlockTrust();
// ppcoin: compute stake entropy bit for stake modifier
- if (!pindexNew->SetStakeEntropyBit(GetStakeEntropyBit(pindexNew->nHeight)))
+ if (!pindexNew->SetStakeEntropyBit(GetStakeEntropyBit(pindexNew->nTime)))
return error("AddToBlockIndex() : SetStakeEntropyBit() failed");
// ppcoin: record proof-of-stake hash value
// ppcoin: compute stake modifier
uint64 nStakeModifier = 0;
bool fGeneratedStakeModifier = false;
- if (!ComputeNextStakeModifier(pindexNew->pprev, nStakeModifier, fGeneratedStakeModifier))
+ if (!ComputeNextStakeModifier(pindexNew, nStakeModifier, fGeneratedStakeModifier))
return error("AddToBlockIndex() : ComputeNextStakeModifier() failed");
pindexNew->SetStakeModifier(nStakeModifier, fGeneratedStakeModifier);
pindexNew->nStakeModifierChecksum = GetStakeModifierChecksum(pindexNew);
return false;
// New best
- if (pindexNew->bnChainTrust > bnBestChainTrust)
+ if (pindexNew->nChainTrust > nBestChainTrust)
if (!SetBestChain(txdb, pindexNew))
return false;
- txdb.Close();
-
if (pindexNew == pindexBest)
{
// Notify UI to display prev block's coinbase if it was ours
-bool CBlock::CheckBlock(bool fCheckPOW, bool fCheckMerkleRoot) const
+bool CBlock::CheckBlock(bool fCheckPOW, bool fCheckMerkleRoot, bool fCheckSig) const
{
// These are checks that are independent of context
// that can be verified before saving an orphan block.
if (vtx.empty() || vtx.size() > MAX_BLOCK_SIZE || ::GetSerializeSize(*this, SER_NETWORK, PROTOCOL_VERSION) > MAX_BLOCK_SIZE)
return DoS(100, error("CheckBlock() : size limits failed"));
- // Special short-term limits to avoid 10,000 BDB lock limit:
- if (GetBlockTime() < LOCKS_SWITCH_TIME)
- {
- // Rule is: #unique txids referenced <= 4,500
- // ... to prevent 10,000 BDB lock exhaustion on old clients
- set<uint256> setTxIn;
- for (size_t i = 0; i < vtx.size(); i++)
- {
- setTxIn.insert(vtx[i].GetHash());
- if (i == 0) continue; // skip coinbase txin
- BOOST_FOREACH(const CTxIn& txin, vtx[i].vin)
- setTxIn.insert(txin.prevout.hash);
- }
- size_t nTxids = setTxIn.size();
- if (nTxids > 4500)
- return error("CheckBlock() : maxlocks violation");
- }
+ bool fProtocol048 = fTestNet || VALIDATION_SWITCH_TIME < nTime;
// Check proof of work matches claimed amount
if (fCheckPOW && IsProofOfWork() && !CheckProofOfWork(GetHash(), nBits))
return DoS(50, error("CheckBlock() : proof of work failed"));
// Check timestamp
- if (GetBlockTime() > GetAdjustedTime() + nMaxClockDrift)
+ if (GetBlockTime() > FutureDrift(GetAdjustedTime()))
return error("CheckBlock() : block timestamp too far in the future");
// First transaction must be coinbase, the rest must not be
if (vtx.empty() || !vtx[0].IsCoinBase())
return DoS(100, error("CheckBlock() : first tx is not coinbase"));
+
+ if (!fProtocol048)
+ {
+ // Check coinbase timestamp
+ if (GetBlockTime() < (int64)vtx[0].nTime)
+ return DoS(100, error("CheckBlock() : coinbase timestamp violation"));
+ }
+ else
+ {
+ // Check coinbase timestamp
+ if (GetBlockTime() < PastDrift((int64)vtx[0].nTime))
+ return DoS(50, error("CheckBlock() : coinbase timestamp is too late"));
+ }
+
for (unsigned int i = 1; i < vtx.size(); i++)
+ {
if (vtx[i].IsCoinBase())
return DoS(100, error("CheckBlock() : more than one coinbase"));
- // Check coinbase timestamp
- if (GetBlockTime() > (int64)vtx[0].nTime + nMaxClockDrift)
- return DoS(50, error("CheckBlock() : coinbase timestamp is too early"));
+ // Check transaction timestamp
+ if (GetBlockTime() < (int64)vtx[i].nTime)
+ return DoS(50, error("CheckBlock() : block timestamp earlier than transaction timestamp"));
+ }
if (IsProofOfStake())
{
- // ppcoin: coinbase output should be empty if proof-of-stake block
+ if (fProtocol048)
+ {
+ if (nNonce != 0)
+ return DoS(100, error("CheckBlock() : non-zero nonce in proof-of-stake block"));
+ }
+
+ // Coinbase output should be empty if proof-of-stake block
if (vtx[0].vout.size() != 1 || !vtx[0].vout[0].IsEmpty())
- return error("CheckBlock() : coinbase output not empty for proof-of-stake block");
+ return DoS(100, error("CheckBlock() : coinbase output not empty for proof-of-stake block"));
// Second transaction must be coinstake, the rest must not be
if (vtx.empty() || !vtx[1].IsCoinStake())
return DoS(100, error("CheckBlock() : more than one coinstake"));
// Check coinstake timestamp
- if (!CheckCoinStakeTimestamp(GetBlockTime(), (int64)vtx[1].nTime))
+ if (GetBlockTime() != (int64)vtx[1].nTime)
return DoS(50, error("CheckBlock() : coinstake timestamp violation nTimeBlock=%"PRI64d" nTimeTx=%u", GetBlockTime(), vtx[1].nTime));
+
+ // NovaCoin: check proof-of-stake block signature
+ if (fCheckSig && !CheckBlockSignature(true))
+ return DoS(100, error("CheckBlock() : bad proof-of-stake block signature"));
}
else
{
- // Coinbase fee paid until 20 Sep 2013
- int64 nFee = GetBlockTime() < CHAINCHECKS_SWITCH_TIME ? vtx[0].GetMinFee() - MIN_TX_FEE : 0;
+ // Should we check proof-of-work block signature or not?
+ //
+ // * Always skip on TestNet
+ // * Perform checking for the first 9689 blocks
+ // * Perform checking since last checkpoint until 20 Sep 2013 (will be removed after)
- // Check coinbase reward
- if (vtx[0].GetValueOut() > (GetProofOfWorkReward(nBits) - nFee))
- return DoS(50, error("CheckBlock() : coinbase reward exceeded %s > %s",
- FormatMoney(vtx[0].GetValueOut()).c_str(),
- FormatMoney(GetProofOfWorkReward(nBits) - nFee).c_str()));
+ if(!fTestNet && fCheckSig)
+ {
+ bool checkEntropySig = (GetBlockTime() < ENTROPY_SWITCH_TIME);
+
+ // NovaCoin: check proof-of-work block signature
+ if (checkEntropySig && !CheckBlockSignature(false))
+ return DoS(100, error("CheckBlock() : bad proof-of-work block signature"));
+ }
}
// Check transactions
{
if (!tx.CheckTransaction())
return DoS(tx.nDoS, error("CheckBlock() : CheckTransaction failed"));
-
- // ppcoin: check transaction timestamp
- if (GetBlockTime() < (int64)tx.nTime)
- return DoS(50, error("CheckBlock() : block timestamp earlier than transaction timestamp"));
}
// Check for duplicate txids. This is caught by ConnectInputs(),
if (fCheckMerkleRoot && hashMerkleRoot != BuildMerkleTree())
return DoS(100, error("CheckBlock() : hashMerkleRoot mismatch"));
- // NovaCoin: check proof-of-stake block signature
- if (IsProofOfStake() || (!fTestNet && GetBlockTime() < CHAINCHECKS_SWITCH_TIME))
- {
- if (!CheckBlockSignature())
- return DoS(100, error("CheckBlock() : bad block signature"));
- }
return true;
}
return DoS(100, error("AcceptBlock() : incorrect %s", IsProofOfWork() ? "proof-of-work" : "proof-of-stake"));
// Check timestamp against prev
- if (GetBlockTime() <= pindexPrev->GetMedianTimePast() || GetBlockTime() + nMaxClockDrift < pindexPrev->GetBlockTime())
+ if (GetBlockTime() <= pindexPrev->GetMedianTimePast() || FutureDrift(GetBlockTime()) < pindexPrev->GetBlockTime())
return error("AcceptBlock() : block's timestamp is too early");
// Check that all transactions are finalized
if (!Checkpoints::CheckHardened(nHeight, hash))
return DoS(100, error("AcceptBlock() : rejected by hardened checkpoint lock-in at %d", nHeight));
- // ppcoin: check that the block satisfies synchronized checkpoint
- if (!Checkpoints::CheckSync(hash, pindexPrev))
- {
- if(!GetBoolArg("-nosynccheckpoints", false))
- {
- return error("AcceptBlock() : rejected by synchronized checkpoint");
- }
- else
- {
- strMiscWarning = _("WARNING: syncronized checkpoint violation detected, but skipped!");
- }
- }
+ bool cpSatisfies = Checkpoints::CheckSync(hash, pindexPrev);
+
+ // Check that the block satisfies synchronized checkpoint
+ if (CheckpointsMode == Checkpoints::STRICT && !cpSatisfies)
+ return error("AcceptBlock() : rejected by synchronized checkpoint");
- // Reject block.nVersion < 3 blocks since 95% threshold on mainNet and always on testNet:
- if (nVersion < 3 && ((!fTestNet && nHeight > 14060) || (fTestNet && nHeight > 0)))
- return error("CheckBlock() : rejected nVersion < 3 block");
+ if (CheckpointsMode == Checkpoints::ADVISORY && !cpSatisfies)
+ strMiscWarning = _("WARNING: syncronized checkpoint violation detected, but skipped!");
// Enforce rule that the coinbase starts with serialized block height
CScript expect = CScript() << nHeight;
- if (!std::equal(expect.begin(), expect.end(), vtx[0].vin[0].scriptSig.begin()))
+ if (vtx[0].vin[0].scriptSig.size() < expect.size() ||
+ !std::equal(expect.begin(), expect.end(), vtx[0].vin[0].scriptSig.begin()))
return DoS(100, error("AcceptBlock() : block height mismatch in coinbase"));
// Write block to history file
return true;
}
-CBigNum CBlockIndex::GetBlockTrust() const
+uint256 CBlockIndex::GetBlockTrust() const
{
CBigNum bnTarget;
bnTarget.SetCompact(nBits);
if (bnTarget <= 0)
return 0;
- /* Old protocol, will be removed later */
+ /* Old protocol */
if (!fTestNet && GetBlockTime() < CHAINCHECKS_SWITCH_TIME)
- return (IsProofOfStake()? (CBigNum(1)<<256) / (bnTarget+1) : 1);
+ return (IsProofOfStake()? ((CBigNum(1)<<256) / (bnTarget+1)).getuint256() : 1);
/* New protocol */
// Calculate work amount for block
- CBigNum bnPoWTrust = bnPoWBase / (bnTarget+1);
+ uint256 nPoWTrust = (CBigNum(nPoWBase) / (bnTarget+1)).getuint256();
- // Set bnPowTrust to 1 if we are checking PoS block or PoW difficulty is too low
- bnPoWTrust = (IsProofOfStake() || bnPoWTrust < 1) ? 1 : bnPoWTrust;
+ // Set nPowTrust to 1 if we are checking PoS block or PoW difficulty is too low
+ nPoWTrust = (IsProofOfStake() || nPoWTrust < 1) ? 1 : nPoWTrust;
- // Return bnPoWTrust for the first 12 blocks
+ // Return nPoWTrust for the first 12 blocks
if (pprev == NULL || pprev->nHeight < 12)
- return bnPoWTrust;
+ return nPoWTrust;
const CBlockIndex* currentIndex = pprev;
if(IsProofOfStake())
{
+ CBigNum bnNewTrust = (CBigNum(1)<<256) / (bnTarget+1);
+
// Return 1/3 of score if parent block is not the PoW block
if (!pprev->IsProofOfWork())
- return (CBigNum(1)<<256) / (3 * (bnTarget+1));
+ return (bnNewTrust / 3).getuint256();
int nPoWCount = 0;
// Return 1/3 of score if less than 3 PoW blocks found
if (nPoWCount < 3)
- return (CBigNum(1)<<256) / (3 * (bnTarget+1));
+ return (bnNewTrust / 3).getuint256();
- return (CBigNum(1)<<256) / (bnTarget+1);
+ return bnNewTrust.getuint256();
}
else
{
- // Return bnPoWTrust + 2/3 of previous block score if two parent blocks are not PoS blocks
+ CBigNum bnLastBlockTrust = CBigNum(pprev->nChainTrust - pprev->pprev->nChainTrust);
+
+ // Return nPoWTrust + 2/3 of previous block score if two parent blocks are not PoS blocks
if (!(pprev->IsProofOfStake() && pprev->pprev->IsProofOfStake()))
- return bnPoWTrust + (2 * (pprev->bnChainTrust - pprev->pprev->bnChainTrust) / 3);
+ return nPoWTrust + (2 * bnLastBlockTrust / 3).getuint256();
int nPoSCount = 0;
currentIndex = currentIndex->pprev;
}
- // Return bnPoWTrust + 2/3 of previous block score if less than 7 PoS blocks found
+ // Return nPoWTrust + 2/3 of previous block score if less than 7 PoS blocks found
if (nPoSCount < 7)
- return bnPoWTrust + (2 * (pprev->bnChainTrust - pprev->pprev->bnChainTrust) / 3);
+ return nPoWTrust + (2 * bnLastBlockTrust / 3).getuint256();
bnTarget.SetCompact(pprev->nBits);
if (bnTarget <= 0)
return 0;
- // Return bnPoWTrust + full trust score for previous block nBits
- return bnPoWTrust + (CBigNum(1)<<256) / (bnTarget+1);
+ CBigNum bnNewTrust = (CBigNum(1)<<256) / (bnTarget+1);
+
+ // Return nPoWTrust + full trust score for previous block nBits
+ return nPoWTrust + bnNewTrust.getuint256();
}
}
// ppcoin: verify hash target and signature of coinstake tx
if (pblock->IsProofOfStake())
{
- uint256 hashProofOfStake = 0;
- if (!CheckProofOfStake(pblock->vtx[1], pblock->nBits, hashProofOfStake))
+ uint256 hashProofOfStake = 0, targetProofOfStake = 0;
+ if (!CheckProofOfStake(pblock->vtx[1], pblock->nBits, hashProofOfStake, targetProofOfStake))
{
printf("WARNING: ProcessBlock(): check proof-of-stake failed for block %s\n", hash.ToString().c_str());
return false; // do not error here as we expect this during initial block download
CBigNum bnNewBlock;
bnNewBlock.SetCompact(pblock->nBits);
CBigNum bnRequired;
- bnRequired.SetCompact(ComputeMinWork(GetLastBlockIndex(pcheckpoint, pblock->IsProofOfStake())->nBits, deltaTime));
+
+ if (pblock->IsProofOfStake())
+ bnRequired.SetCompact(ComputeMinStake(GetLastBlockIndex(pcheckpoint, true)->nBits, deltaTime, pblock->nTime));
+ else
+ bnRequired.SetCompact(ComputeMinWork(GetLastBlockIndex(pcheckpoint, false)->nBits, deltaTime));
+
if (bnNewBlock > bnRequired)
{
if (pfrom)
return true;
}
-// ppcoin: sign block
-bool CBlock::SignBlock(const CKeyStore& keystore)
+// novacoin: attempt to generate suitable proof-of-stake
+bool CBlock::SignBlock(CWallet& wallet)
{
- vector<valtype> vSolutions;
- txnouttype whichType;
-
- if(!IsProofOfStake())
- {
- for(unsigned int i = 0; i < vtx[0].vout.size(); i++)
- {
- const CTxOut& txout = vtx[0].vout[i];
+ // if we are trying to sign
+ // something except proof-of-stake block template
+ if (!vtx[0].vout[0].IsEmpty())
+ return false;
- if (!Solver(txout.scriptPubKey, whichType, vSolutions))
- continue;
+ // if we are trying to sign
+ // a complete proof-of-stake block
+ if (IsProofOfStake())
+ return true;
- if (whichType == TX_PUBKEY)
- {
- // Sign
- valtype& vchPubKey = vSolutions[0];
- CKey key;
+ static int64 nLastCoinStakeSearchTime = GetAdjustedTime(); // startup timestamp
- if (!keystore.GetKey(Hash160(vchPubKey), key))
- continue;
- if (key.GetPubKey() != vchPubKey)
- continue;
- if(!key.Sign(GetHash(), vchBlockSig))
- continue;
+ CKey key;
+ CTransaction txCoinStake;
+ int64 nSearchTime = txCoinStake.nTime; // search to current time
- return true;
- }
- }
- }
- else
+ if (nSearchTime > nLastCoinStakeSearchTime)
{
- const CTxOut& txout = vtx[1].vout[1];
-
- if (!Solver(txout.scriptPubKey, whichType, vSolutions))
- return false;
-
- if (whichType == TX_PUBKEY)
+ if (wallet.CreateCoinStake(wallet, nBits, nSearchTime-nLastCoinStakeSearchTime, txCoinStake, key))
{
- // Sign
- valtype& vchPubKey = vSolutions[0];
- CKey key;
-
- if (!keystore.GetKey(Hash160(vchPubKey), key))
- return false;
- if (key.GetPubKey() != vchPubKey)
- return false;
-
- return key.Sign(GetHash(), vchBlockSig);
+ if (txCoinStake.nTime >= max(pindexBest->GetMedianTimePast()+1, PastDrift(pindexBest->GetBlockTime())))
+ {
+ // make sure coinstake would meet timestamp protocol
+ // as it would be the same as the block timestamp
+ vtx[0].nTime = nTime = txCoinStake.nTime;
+ nTime = max(pindexBest->GetMedianTimePast()+1, GetMaxTransactionTime());
+ nTime = max(GetBlockTime(), PastDrift(pindexBest->GetBlockTime()));
+
+ // we have to make sure that we have no future timestamps in
+ // our transactions set
+ for (vector<CTransaction>::iterator it = vtx.begin(); it != vtx.end();)
+ if (it->nTime > nTime) { it = vtx.erase(it); } else { ++it; }
+
+ vtx.insert(vtx.begin() + 1, txCoinStake);
+ hashMerkleRoot = BuildMerkleTree();
+
+ // append a signature to our block
+ return key.Sign(GetHash(), vchBlockSig);
+ }
}
+ nLastCoinStakeSearchInterval = nSearchTime - nLastCoinStakeSearchTime;
+ nLastCoinStakeSearchTime = nSearchTime;
}
- printf("Sign failed\n");
return false;
}
// ppcoin: check block signature
-bool CBlock::CheckBlockSignature() const
+bool CBlock::CheckBlockSignature(bool fProofOfStake) const
{
if (GetHash() == (!fTestNet ? hashGenesisBlock : hashGenesisBlockTestNet))
return vchBlockSig.empty();
vector<valtype> vSolutions;
txnouttype whichType;
- if(IsProofOfStake())
+ if(fProofOfStake)
{
const CTxOut& txout = vtx[1].vout[1];
FILE* AppendBlockFile(unsigned int& nFileRet)
{
nFileRet = 0;
- loop
+ while (true)
{
FILE* file = OpenBlockFile(nCurrentBlockFile, 0, "ab");
if (!file)
bool LoadBlockIndex(bool fAllowNew)
{
+ CBigNum bnTrustedModulus;
+
if (fTestNet)
{
pchMessageStart[0] = 0xcd;
pchMessageStart[2] = 0xc0;
pchMessageStart[3] = 0xef;
+ bnTrustedModulus.SetHex("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");
bnProofOfWorkLimit = bnProofOfWorkLimitTestNet; // 16 bits PoW target limit for testnet
nStakeMinAge = 2 * 60 * 60; // test net min age is 2 hours
nModifierInterval = 20 * 60; // test modifier interval is 20 minutes
nCoinbaseMaturity = 10; // test maturity is 10 blocks
nStakeTargetSpacing = 5 * 60; // test block spacing is 5 minutes
}
+ else
+ {
+ bnTrustedModulus.SetHex("d01f952e1090a5a72a3eda261083256596ccc192935ae1454c2bafd03b09e6ed11811be9f3a69f5783bbbced8c6a0c56621f42c2d19087416facf2f13cc7ed7159d1c5253119612b8449f0c7f54248e382d30ecab1928dbf075c5425dcaee1a819aa13550e0f3227b8c685b14e0eae094d65d8a610a6f49fff8145259d1187e4c6a472fa5868b2b67f957cb74b787f4311dbc13c97a2ca13acdb876ff506ebecbb904548c267d68868e07a32cd9ed461fbc2f920e9940e7788fed2e4817f274df5839c2196c80abe5c486df39795186d7bc86314ae1e8342f3c884b158b4b05b4302754bf351477d35370bad6639b2195d30006b77bf3dbb28b848fd9ecff5662bf39dde0c974e83af51b0d3d642d43834827b8c3b189065514636b8f2a59c42ba9b4fc4975d4827a5d89617a3873e4b377b4d559ad165748632bd928439cfbc5a8ef49bc2220e0b15fb0aa302367d5e99e379a961c1bc8cf89825da5525e3c8f14d7d8acca2fa9c133a2176ae69874d8b1d38b26b9c694e211018005a97b40848681b9dd38feb2de141626fb82591aad20dc629b2b6421cef1227809551a0e4e943ab99841939877f18f2d9c0addc93cf672e26b02ed94da3e6d329e8ac8f3736eebbf37bb1a21e5aadf04ee8e3b542f876aa88b2adf2608bd86329b7f7a56fd0dc1c40b48188731d11082aea360c62a0840c2db3dad7178fd7e359317ae081");
+ }
+
+ // Set up the Zerocoin Params object
+ ZCParams = new libzerocoin::Params(bnTrustedModulus);
//
// Load block index
//
- CTxDB txdb("cr");
+ CTxDB txdb("cr+");
if (!txdb.LoadBlockIndex())
return false;
- txdb.Close();
//
// Init with genesis block
if (!block.AddToBlockIndex(nFile, nBlockPos))
return error("LoadBlockIndex() : genesis block not accepted");
- // ppcoin: initialize synchronized checkpoint
+ // initialize synchronized checkpoint
if (!Checkpoints::WriteSyncCheckpoint((!fTestNet ? hashGenesisBlock : hashGenesisBlockTestNet)))
return error("LoadBlockIndex() : failed to init sync checkpoint");
+
+ // upgrade time set to zero if txdb initialized
+ {
+ if (!txdb.WriteModifierUpgradeTime(0))
+ return error("LoadBlockIndex() : failed to init upgrade info");
+ printf(" Upgrade Info: ModifierUpgradeTime txdb initialization\n");
+ }
}
- // ppcoin: if checkpoint master key changed must reset sync-checkpoint
{
- CTxDB txdb;
+ CTxDB txdb("r+");
string strPubKey = "";
if (!txdb.ReadCheckpointPubKey(strPubKey) || strPubKey != CSyncCheckpoint::strMasterPubKey)
{
if ((!fTestNet) && !Checkpoints::ResetSyncCheckpoint())
return error("LoadBlockIndex() : failed to reset sync-checkpoint");
}
+
+ // upgrade time set to zero if blocktreedb initialized
+ if (txdb.ReadModifierUpgradeTime(nModifierUpgradeTime))
+ {
+ if (nModifierUpgradeTime)
+ printf(" Upgrade Info: blocktreedb upgrade detected at timestamp %d\n", nModifierUpgradeTime);
+ else
+ printf(" Upgrade Info: no blocktreedb upgrade detected.\n");
+ }
+ else
+ {
+ nModifierUpgradeTime = GetTime();
+ printf(" Upgrade Info: upgrading blocktreedb at timestamp %u\n", nModifierUpgradeTime);
+ if (!txdb.WriteModifierUpgradeTime(nModifierUpgradeTime))
+ return error("LoadBlockIndex() : failed to write upgrade info");
+ }
+
+#ifndef USE_LEVELDB
txdb.Close();
+#endif
}
return true;
return nLoaded > 0;
}
-
-
-
-
-
-
-
-
//////////////////////////////////////////////////////////////////////////////
//
// CAlert
extern map<uint256, CAlert> mapAlerts;
extern CCriticalSection cs_mapAlerts;
-static string strMintMessage = "Info: Minting suspended due to locked wallet.";
-static string strMintWarning;
-
string GetWarnings(string strFor)
{
int nPriority = 0;
if (GetBoolArg("-testsafemode"))
strRPC = "test";
- // ppcoin: wallet lock warning for minting
- if (strMintWarning != "")
- {
- nPriority = 0;
- strStatusBar = strMintWarning;
- }
-
// Misc warnings like out of disk space and clock is wrong
if (strMiscWarning != "")
{
strStatusBar = strMiscWarning;
}
- // ppcoin: should not enter safe mode for longer invalid chain
- // ppcoin: if sync-checkpoint is too old do not enter safe mode
- if (Checkpoints::IsSyncCheckpointTooOld(60 * 60 * 24 * 10) && !fTestNet && !IsInitialBlockDownload())
+ // if detected unmet upgrade requirement enter safe mode
+ // Note: Modifier upgrade requires blockchain redownload if past protocol switch
+ if (IsFixedModifierInterval(nModifierUpgradeTime + 60*60*24)) // 1 day margin
{
- nPriority = 100;
- strStatusBar = "WARNING: Checkpoint is too old. Wait for block chain to download, or notify developers.";
+ nPriority = 5000;
+ strStatusBar = strRPC = "WARNING: Blockchain redownload required approaching or past v.0.4.4.6u4 upgrade deadline.";
}
- // ppcoin: if detected invalid checkpoint enter safe mode
+ // if detected invalid checkpoint enter safe mode
if (Checkpoints::hashInvalidCheckpoint != 0)
{
nPriority = 3000;
- strStatusBar = strRPC = "WARNING: Invalid checkpoint found! Displayed transactions may not be correct! You may need to upgrade, or notify developers.";
+ strStatusBar = strRPC = _("WARNING: Invalid checkpoint found! Displayed transactions may not be correct! You may need to upgrade, or notify developers.");
}
// Alerts
nPriority = alert.nPriority;
strStatusBar = alert.strStatusBar;
if (nPriority > 1000)
- strRPC = strStatusBar; // ppcoin: safe mode for high alert
+ strRPC = strStatusBar;
}
}
}
return true;
}
-
-
-
-
if (strCommand == "version")
{
// Each connection can only send one version message
return true;
}
- // ppcoin: record my external IP reported by peer
+ if (pfrom->nVersion < 60010)
+ {
+ printf("partner %s using a buggy client %d, disconnecting\n", pfrom->addr.ToString().c_str(), pfrom->nVersion);
+ pfrom->fDisconnect = true;
+ return true;
+ }
+
+ // record my external IP reported by peer
if (addrFrom.IsRoutable() && addrMe.IsRoutable())
addrSeenByPeer = addrMe;
item.second.RelayTo(pfrom);
}
- // ppcoin: relay sync-checkpoint
+ // Relay sync-checkpoint
{
LOCK(Checkpoints::cs_hashSyncCheckpoint);
if (!Checkpoints::checkpointMessage.IsNull())
pfrom->fDisconnect = true;
}
-
else if (strCommand == "inv")
{
vector<CInv> vInv;
CInv inv(MSG_TX, tx.GetHash());
pfrom->AddInventoryKnown(inv);
- // Truncate messages to the size of the tx in them
- unsigned int nSize = ::GetSerializeSize(tx,SER_NETWORK, PROTOCOL_VERSION);
- if (nSize < vMsg.size()){
- vMsg.resize(nSize);
- }
-
bool fMissingInputs = false;
if (tx.AcceptToMemoryPool(txdb, true, &fMissingInputs))
{
SyncWithWallets(tx, NULL, true);
- RelayMessage(inv, vMsg);
+ RelayTransaction(tx, inv.hash);
mapAlreadyAskedFor.erase(inv);
vWorkQueue.push_back(inv.hash);
vEraseQueue.push_back(inv.hash);
for (unsigned int i = 0; i < vWorkQueue.size(); i++)
{
uint256 hashPrev = vWorkQueue[i];
- for (map<uint256, CDataStream*>::iterator mi = mapOrphanTransactionsByPrev[hashPrev].begin();
+ for (set<uint256>::iterator mi = mapOrphanTransactionsByPrev[hashPrev].begin();
mi != mapOrphanTransactionsByPrev[hashPrev].end();
++mi)
{
- const CDataStream& vMsg = *((*mi).second);
- CTransaction tx;
- CDataStream(vMsg) >> tx;
- CInv inv(MSG_TX, tx.GetHash());
+ const uint256& orphanTxHash = *mi;
+ CTransaction& orphanTx = mapOrphanTransactions[orphanTxHash];
bool fMissingInputs2 = false;
- if (tx.AcceptToMemoryPool(txdb, true, &fMissingInputs2))
+ if (orphanTx.AcceptToMemoryPool(txdb, true, &fMissingInputs2))
{
- printf(" accepted orphan tx %s\n", inv.hash.ToString().substr(0,10).c_str());
+ printf(" accepted orphan tx %s\n", orphanTxHash.ToString().substr(0,10).c_str());
SyncWithWallets(tx, NULL, true);
- RelayMessage(inv, vMsg);
- mapAlreadyAskedFor.erase(inv);
- vWorkQueue.push_back(inv.hash);
- vEraseQueue.push_back(inv.hash);
+ RelayTransaction(orphanTx, orphanTxHash);
+ mapAlreadyAskedFor.erase(CInv(MSG_TX, orphanTxHash));
+ vWorkQueue.push_back(orphanTxHash);
+ vEraseQueue.push_back(orphanTxHash);
}
else if (!fMissingInputs2)
{
// invalid orphan
- vEraseQueue.push_back(inv.hash);
- printf(" removed invalid orphan tx %s\n", inv.hash.ToString().substr(0,10).c_str());
+ vEraseQueue.push_back(orphanTxHash);
+ printf(" removed invalid orphan tx %s\n", orphanTxHash.ToString().substr(0,10).c_str());
}
}
}
}
else if (fMissingInputs)
{
- AddOrphanTx(vMsg);
+ AddOrphanTx(tx);
// DoS prevention: do not allow mapOrphanTransactions to grow unbounded
unsigned int nEvicted = LimitOrphanTxSize(MAX_ORPHAN_TRANSACTIONS);
{
CBlock block;
vRecv >> block;
+ uint256 hashBlock = block.GetHash();
- printf("received block %s\n", block.GetHash().ToString().substr(0,20).c_str());
+ printf("received block %s\n", hashBlock.ToString().substr(0,20).c_str());
// block.print();
- CInv inv(MSG_BLOCK, block.GetHash());
+ CInv inv(MSG_BLOCK, hashBlock);
pfrom->AddInventoryKnown(inv);
if (ProcessBlock(pfrom, &block))
else if (strCommand == "getaddr")
{
+ // Don't return addresses older than nCutOff timestamp
+ int64 nCutOff = GetTime() - (nNodeLifespan * 24 * 60 * 60);
pfrom->vAddrToSend.clear();
vector<CAddress> vAddr = addrman.GetAddr();
BOOST_FOREACH(const CAddress &addr, vAddr)
- pfrom->PushAddress(addr);
+ if(addr.nTime > nCutOff)
+ pfrom->PushAddress(addr);
}
// (x) data
//
- loop
+ while (true)
{
// Don't bother if send buffer is too full to respond anyway
if (pfrom->vSend.size() >= SendBufferSize())
pto->PushMessage("ping");
}
+ // Start block sync
+ if (pto->fStartSync) {
+ pto->fStartSync = false;
+ pto->PushGetBlocks(pindexBest, uint256(0));
+ }
+
// Resend wallet transactions that haven't gotten in a block yet
ResendWalletTransactions();
}
return true;
}
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-//////////////////////////////////////////////////////////////////////////////
-//
-// BitcoinMiner
-//
-
-int static FormatHashBlocks(void* pbuffer, unsigned int len)
-{
- unsigned char* pdata = (unsigned char*)pbuffer;
- unsigned int blocks = 1 + ((len + 8) / 64);
- unsigned char* pend = pdata + 64 * blocks;
- memset(pdata + len, 0, 64 * blocks - len);
- pdata[len] = 0x80;
- unsigned int bits = len * 8;
- pend[-1] = (bits >> 0) & 0xff;
- pend[-2] = (bits >> 8) & 0xff;
- pend[-3] = (bits >> 16) & 0xff;
- pend[-4] = (bits >> 24) & 0xff;
- return blocks;
-}
-
-static const unsigned int pSHA256InitState[8] =
-{0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a, 0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19};
-
-void SHA256Transform(void* pstate, void* pinput, const void* pinit)
-{
- SHA256_CTX ctx;
- unsigned char data[64];
-
- SHA256_Init(&ctx);
-
- for (int i = 0; i < 16; i++)
- ((uint32_t*)data)[i] = ByteReverse(((uint32_t*)pinput)[i]);
-
- for (int i = 0; i < 8; i++)
- ctx.h[i] = ((uint32_t*)pinit)[i];
-
- SHA256_Update(&ctx, data, sizeof(data));
- for (int i = 0; i < 8; i++)
- ((uint32_t*)pstate)[i] = ctx.h[i];
-}
-
-// Some explaining would be appreciated
-class COrphan
-{
-public:
- CTransaction* ptx;
- set<uint256> setDependsOn;
- double dPriority;
- double dFeePerKb;
-
- COrphan(CTransaction* ptxIn)
- {
- ptx = ptxIn;
- dPriority = dFeePerKb = 0;
- }
-
- void print() const
- {
- printf("COrphan(hash=%s, dPriority=%.1f, dFeePerKb=%.1f)\n",
- ptx->GetHash().ToString().substr(0,10).c_str(), dPriority, dFeePerKb);
- BOOST_FOREACH(uint256 hash, setDependsOn)
- printf(" setDependsOn %s\n", hash.ToString().substr(0,10).c_str());
- }
-};
-
-
-uint64 nLastBlockTx = 0;
-uint64 nLastBlockSize = 0;
-int64 nLastCoinStakeSearchInterval = 0;
-
-// We want to sort transactions by priority and fee, so:
-typedef boost::tuple<double, double, CTransaction*> TxPriority;
-class TxPriorityCompare
-{
- bool byFee;
-public:
- TxPriorityCompare(bool _byFee) : byFee(_byFee) { }
- bool operator()(const TxPriority& a, const TxPriority& b)
- {
- if (byFee)
- {
- if (a.get<1>() == b.get<1>())
- return a.get<0>() < b.get<0>();
- return a.get<1>() < b.get<1>();
- }
- else
- {
- if (a.get<0>() == b.get<0>())
- return a.get<1>() < b.get<1>();
- return a.get<0>() < b.get<0>();
- }
- }
-};
-
-// CreateNewBlock:
-// fProofOfStake: try (best effort) to make a proof-of-stake block
-CBlock* CreateNewBlock(CWallet* pwallet, bool fProofOfStake)
-{
- CReserveKey reservekey(pwallet);
-
- // Create new block
- auto_ptr<CBlock> pblock(new CBlock());
- if (!pblock.get())
- return NULL;
-
- // Create coinbase tx
- CTransaction txNew;
- txNew.vin.resize(1);
- txNew.vin[0].prevout.SetNull();
- txNew.vout.resize(1);
- txNew.vout[0].scriptPubKey << reservekey.GetReservedKey() << OP_CHECKSIG;
-
- // Add our coinbase tx as first transaction
- pblock->vtx.push_back(txNew);
-
- // Largest block you're willing to create:
- unsigned int nBlockMaxSize = GetArg("-blockmaxsize", MAX_BLOCK_SIZE_GEN/2);
- // Limit to betweeen 1K and MAX_BLOCK_SIZE-1K for sanity:
- nBlockMaxSize = std::max((unsigned int)1000, std::min((unsigned int)(MAX_BLOCK_SIZE-1000), nBlockMaxSize));
-
- // Special compatibility rule before 20 Aug: limit size to 500,000 bytes:
- if (GetAdjustedTime() < LOCKS_SWITCH_TIME)
- nBlockMaxSize = std::min(nBlockMaxSize, (unsigned int)(MAX_BLOCK_SIZE_GEN));
-
- // How much of the block should be dedicated to high-priority transactions,
- // included regardless of the fees they pay
- unsigned int nBlockPrioritySize = GetArg("-blockprioritysize", 27000);
- nBlockPrioritySize = std::min(nBlockMaxSize, nBlockPrioritySize);
-
- // Minimum block size you want to create; block will be filled with free transactions
- // until there are no more or the block reaches this size:
- unsigned int nBlockMinSize = GetArg("-blockminsize", 0);
- nBlockMinSize = std::min(nBlockMaxSize, nBlockMinSize);
-
- // Fee-per-kilobyte amount considered the same as "free"
- // Be careful setting this: if you set it to zero then
- // a transaction spammer can cheaply fill blocks using
- // 1-satoshi-fee transactions. It should be set above the real
- // cost to you of processing a transaction.
- int64 nMinTxFee = MIN_TX_FEE;
- if (mapArgs.count("-mintxfee"))
- ParseMoney(mapArgs["-mintxfee"], nMinTxFee);
-
- // ppcoin: if coinstake available add coinstake tx
- static int64 nLastCoinStakeSearchTime = GetAdjustedTime(); // only initialized at startup
- CBlockIndex* pindexPrev = pindexBest;
-
- if (fProofOfStake) // attempt to find a coinstake
- {
- pblock->nBits = GetNextTargetRequired(pindexPrev, true);
- CTransaction txCoinStake;
- int64 nSearchTime = txCoinStake.nTime; // search to current time
- if (nSearchTime > nLastCoinStakeSearchTime)
- {
- if (pwallet->CreateCoinStake(*pwallet, pblock->nBits, nSearchTime-nLastCoinStakeSearchTime, txCoinStake))
- {
- if (txCoinStake.nTime >= max(pindexPrev->GetMedianTimePast()+1, pindexPrev->GetBlockTime() - nMaxClockDrift))
- { // make sure coinstake would meet timestamp protocol
- // as it would be the same as the block timestamp
- pblock->vtx[0].vout[0].SetEmpty();
- pblock->vtx[0].nTime = txCoinStake.nTime;
- pblock->vtx.push_back(txCoinStake);
- }
- }
- nLastCoinStakeSearchInterval = nSearchTime - nLastCoinStakeSearchTime;
- nLastCoinStakeSearchTime = nSearchTime;
- }
- }
-
- pblock->nBits = GetNextTargetRequired(pindexPrev, pblock->IsProofOfStake());
-
- // Collect memory pool transactions into the block
- int64 nFees = 0;
- {
- LOCK2(cs_main, mempool.cs);
- CBlockIndex* pindexPrev = pindexBest;
- CTxDB txdb("r");
-
- // Priority order to process transactions
- list<COrphan> vOrphan; // list memory doesn't move
- map<uint256, vector<COrphan*> > mapDependers;
-
- // This vector will be sorted into a priority queue:
- vector<TxPriority> vecPriority;
- vecPriority.reserve(mempool.mapTx.size());
- for (map<uint256, CTransaction>::iterator mi = mempool.mapTx.begin(); mi != mempool.mapTx.end(); ++mi)
- {
- CTransaction& tx = (*mi).second;
- if (tx.IsCoinBase() || tx.IsCoinStake() || !tx.IsFinal())
- continue;
-
- COrphan* porphan = NULL;
- double dPriority = 0;
- int64 nTotalIn = 0;
- bool fMissingInputs = false;
- BOOST_FOREACH(const CTxIn& txin, tx.vin)
- {
- // Read prev transaction
- CTransaction txPrev;
- CTxIndex txindex;
- if (!txPrev.ReadFromDisk(txdb, txin.prevout, txindex))
- {
- // This should never happen; all transactions in the memory
- // pool should connect to either transactions in the chain
- // or other transactions in the memory pool.
- if (!mempool.mapTx.count(txin.prevout.hash))
- {
- printf("ERROR: mempool transaction missing input\n");
- if (fDebug) assert("mempool transaction missing input" == 0);
- fMissingInputs = true;
- if (porphan)
- vOrphan.pop_back();
- break;
- }
-
- // Has to wait for dependencies
- if (!porphan)
- {
- // Use list for automatic deletion
- vOrphan.push_back(COrphan(&tx));
- porphan = &vOrphan.back();
- }
- mapDependers[txin.prevout.hash].push_back(porphan);
- porphan->setDependsOn.insert(txin.prevout.hash);
- nTotalIn += mempool.mapTx[txin.prevout.hash].vout[txin.prevout.n].nValue;
- continue;
- }
- int64 nValueIn = txPrev.vout[txin.prevout.n].nValue;
- nTotalIn += nValueIn;
-
- int nConf = txindex.GetDepthInMainChain();
- dPriority += (double)nValueIn * nConf;
- }
- if (fMissingInputs) continue;
-
- // Priority is sum(valuein * age) / txsize
- unsigned int nTxSize = ::GetSerializeSize(tx, SER_NETWORK, PROTOCOL_VERSION);
- dPriority /= nTxSize;
-
- // This is a more accurate fee-per-kilobyte than is used by the client code, because the
- // client code rounds up the size to the nearest 1K. That's good, because it gives an
- // incentive to create smaller transactions.
- double dFeePerKb = double(nTotalIn-tx.GetValueOut()) / (double(nTxSize)/1000.0);
-
- if (porphan)
- {
- porphan->dPriority = dPriority;
- porphan->dFeePerKb = dFeePerKb;
- }
- else
- vecPriority.push_back(TxPriority(dPriority, dFeePerKb, &(*mi).second));
- }
-
- // Collect transactions into block
- map<uint256, CTxIndex> mapTestPool;
- uint64 nBlockSize = 1000;
- uint64 nBlockTx = 0;
- int nBlockSigOps = 100;
- bool fSortedByFee = (nBlockPrioritySize <= 0);
-
- TxPriorityCompare comparer(fSortedByFee);
- std::make_heap(vecPriority.begin(), vecPriority.end(), comparer);
-
- while (!vecPriority.empty())
- {
- // Take highest priority transaction off the priority queue:
- double dPriority = vecPriority.front().get<0>();
- double dFeePerKb = vecPriority.front().get<1>();
- CTransaction& tx = *(vecPriority.front().get<2>());
-
- std::pop_heap(vecPriority.begin(), vecPriority.end(), comparer);
- vecPriority.pop_back();
-
- // Size limits
- unsigned int nTxSize = ::GetSerializeSize(tx, SER_NETWORK, PROTOCOL_VERSION);
- if (nBlockSize + nTxSize >= nBlockMaxSize)
- continue;
-
- // Legacy limits on sigOps:
- unsigned int nTxSigOps = tx.GetLegacySigOpCount();
- if (nBlockSigOps + nTxSigOps >= MAX_BLOCK_SIGOPS)
- continue;
-
- // Timestamp limit
- if (tx.nTime > GetAdjustedTime() || (pblock->IsProofOfStake() && tx.nTime > pblock->vtx[1].nTime))
- continue;
-
- // ppcoin: simplify transaction fee - allow free = false
- int64 nMinFee = tx.GetMinFee(nBlockSize, false, GMF_BLOCK);
-
- // Skip free transactions if we're past the minimum block size:
- if (fSortedByFee && (dFeePerKb < nMinTxFee) && (nBlockSize + nTxSize >= nBlockMinSize))
- continue;
-
- // Prioritize by fee once past the priority size or we run out of high-priority
- // transactions:
- if (!fSortedByFee &&
- ((nBlockSize + nTxSize >= nBlockPrioritySize) || (dPriority < COIN * 144 / 250)))
- {
- fSortedByFee = true;
- comparer = TxPriorityCompare(fSortedByFee);
- std::make_heap(vecPriority.begin(), vecPriority.end(), comparer);
- }
-
- // Connecting shouldn't fail due to dependency on other memory pool transactions
- // because we're already processing them in order of dependency
- map<uint256, CTxIndex> mapTestPoolTmp(mapTestPool);
- MapPrevTx mapInputs;
- bool fInvalid;
- if (!tx.FetchInputs(txdb, mapTestPoolTmp, false, true, mapInputs, fInvalid))
- continue;
-
- int64 nTxFees = tx.GetValueIn(mapInputs)-tx.GetValueOut();
- if (nTxFees < nMinFee)
- continue;
-
- nTxSigOps += tx.GetP2SHSigOpCount(mapInputs);
- if (nBlockSigOps + nTxSigOps >= MAX_BLOCK_SIGOPS)
- continue;
-
- if (!tx.ConnectInputs(txdb, mapInputs, mapTestPoolTmp, CDiskTxPos(1,1,1), pindexPrev, false, true))
- continue;
- mapTestPoolTmp[tx.GetHash()] = CTxIndex(CDiskTxPos(1,1,1), tx.vout.size());
- swap(mapTestPool, mapTestPoolTmp);
-
- // Added
- pblock->vtx.push_back(tx);
- nBlockSize += nTxSize;
- ++nBlockTx;
- nBlockSigOps += nTxSigOps;
- nFees += nTxFees;
-
- if (fDebug && GetBoolArg("-printpriority"))
- {
- printf("priority %.1f feeperkb %.1f txid %s\n",
- dPriority, dFeePerKb, tx.GetHash().ToString().c_str());
- }
-
- // Add transactions that depend on this one to the priority queue
- uint256 hash = tx.GetHash();
- if (mapDependers.count(hash))
- {
- BOOST_FOREACH(COrphan* porphan, mapDependers[hash])
- {
- if (!porphan->setDependsOn.empty())
- {
- porphan->setDependsOn.erase(hash);
- if (porphan->setDependsOn.empty())
- {
- vecPriority.push_back(TxPriority(porphan->dPriority, porphan->dFeePerKb, porphan->ptx));
- std::push_heap(vecPriority.begin(), vecPriority.end(), comparer);
- }
- }
- }
- }
- }
-
- nLastBlockTx = nBlockTx;
- nLastBlockSize = nBlockSize;
-
- if (fDebug && GetBoolArg("-printpriority"))
- printf("CreateNewBlock(): total size %"PRI64u"\n", nBlockSize);
-
- if (pblock->IsProofOfWork())
- pblock->vtx[0].vout[0].nValue = GetProofOfWorkReward(pblock->nBits);
-
- // Fill in header
- pblock->hashPrevBlock = pindexPrev->GetBlockHash();
- if (pblock->IsProofOfStake())
- pblock->nTime = pblock->vtx[1].nTime; //same as coinstake timestamp
- pblock->nTime = max(pindexPrev->GetMedianTimePast()+1, pblock->GetMaxTransactionTime());
- pblock->nTime = max(pblock->GetBlockTime(), pindexPrev->GetBlockTime() - nMaxClockDrift);
- if (pblock->IsProofOfWork())
- pblock->UpdateTime(pindexPrev);
- pblock->nNonce = 0;
- }
-
- return pblock.release();
-}
-
-
-void IncrementExtraNonce(CBlock* pblock, CBlockIndex* pindexPrev, unsigned int& nExtraNonce)
-{
- // Update nExtraNonce
- static uint256 hashPrevBlock;
- if (hashPrevBlock != pblock->hashPrevBlock)
- {
- nExtraNonce = 0;
- hashPrevBlock = pblock->hashPrevBlock;
- }
- ++nExtraNonce;
- unsigned int nHeight = pindexPrev->nHeight+1; // Height first in coinbase required for block.version=2
- pblock->vtx[0].vin[0].scriptSig = (CScript() << nHeight << CBigNum(nExtraNonce)) + COINBASE_FLAGS;
- assert(pblock->vtx[0].vin[0].scriptSig.size() <= 100);
-
- pblock->hashMerkleRoot = pblock->BuildMerkleTree();
-}
-
-
-void FormatHashBuffers(CBlock* pblock, char* pmidstate, char* pdata, char* phash1)
-{
- //
- // Pre-build hash buffers
- //
- struct
- {
- struct unnamed2
- {
- int nVersion;
- uint256 hashPrevBlock;
- uint256 hashMerkleRoot;
- unsigned int nTime;
- unsigned int nBits;
- unsigned int nNonce;
- }
- block;
- unsigned char pchPadding0[64];
- uint256 hash1;
- unsigned char pchPadding1[64];
- }
- tmp;
- memset(&tmp, 0, sizeof(tmp));
-
- tmp.block.nVersion = pblock->nVersion;
- tmp.block.hashPrevBlock = pblock->hashPrevBlock;
- tmp.block.hashMerkleRoot = pblock->hashMerkleRoot;
- tmp.block.nTime = pblock->nTime;
- tmp.block.nBits = pblock->nBits;
- tmp.block.nNonce = pblock->nNonce;
-
- FormatHashBlocks(&tmp.block, sizeof(tmp.block));
- FormatHashBlocks(&tmp.hash1, sizeof(tmp.hash1));
-
- // Byte swap all the input buffer
- for (unsigned int i = 0; i < sizeof(tmp)/4; i++)
- ((unsigned int*)&tmp)[i] = ByteReverse(((unsigned int*)&tmp)[i]);
-
- // Precalc the first half of the first hash, which stays constant
- SHA256Transform(pmidstate, &tmp.block, pSHA256InitState);
-
- memcpy(pdata, &tmp.block, 128);
- memcpy(phash1, &tmp.hash1, 64);
-}
-
-
-bool CheckWork(CBlock* pblock, CWallet& wallet, CReserveKey& reservekey)
-{
- uint256 hash = pblock->GetHash();
- uint256 hashTarget = CBigNum().SetCompact(pblock->nBits).getuint256();
-
- if (hash > hashTarget && pblock->IsProofOfWork())
- return error("BitcoinMiner : proof-of-work not meeting target");
-
- //// debug print
- printf("BitcoinMiner:\n");
- printf("new block found \n hash: %s \ntarget: %s\n", hash.GetHex().c_str(), hashTarget.GetHex().c_str());
- pblock->print();
- printf("generated %s\n", FormatMoney(pblock->vtx[0].vout[0].nValue).c_str());
-
- // Found a solution
- {
- LOCK(cs_main);
- if (pblock->hashPrevBlock != hashBestChain)
- return error("BitcoinMiner : generated block is stale");
-
- // Remove key from key pool
- reservekey.KeepKey();
-
- // Track how many getdata requests this block gets
- {
- LOCK(wallet.cs_wallet);
- wallet.mapRequestCount[pblock->GetHash()] = 0;
- }
-
- // Process this block the same as if we had received it from another node
- if (!ProcessBlock(NULL, pblock))
- return error("BitcoinMiner : ProcessBlock, block not accepted");
- }
-
- return true;
-}
-
-void BitcoinMiner(CWallet *pwallet, bool fProofOfStake)
-{
- SetThreadPriority(THREAD_PRIORITY_LOWEST);
-
- // Make this thread recognisable as the mining thread
- RenameThread("bitcoin-miner");
-
- // Each thread has its own key and counter
- CReserveKey reservekey(pwallet);
- unsigned int nExtraNonce = 0;
-
- while (fProofOfStake)
- {
- if (fShutdown)
- return;
- while (vNodes.empty() || IsInitialBlockDownload())
- {
- Sleep(1000);
- if (fShutdown)
- return;
- if (!fProofOfStake)
- return;
- }
-
- while (pwallet->IsLocked())
- {
- strMintWarning = strMintMessage;
- Sleep(1000);
- }
- strMintWarning = "";
-
- //
- // Create new block
- //
- CBlockIndex* pindexPrev = pindexBest;
-
- auto_ptr<CBlock> pblock(CreateNewBlock(pwallet, fProofOfStake));
- if (!pblock.get())
- return;
- IncrementExtraNonce(pblock.get(), pindexPrev, nExtraNonce);
-
- if (fProofOfStake)
- {
- // ppcoin: if proof-of-stake block found then process block
- if (pblock->IsProofOfStake())
- {
- if (!pblock->SignBlock(*pwalletMain))
- {
- strMintWarning = strMintMessage;
- continue;
- }
- strMintWarning = "";
- printf("StakeMiner : proof-of-stake block found %s\n", pblock->GetHash().ToString().c_str());
- SetThreadPriority(THREAD_PRIORITY_NORMAL);
- CheckWork(pblock.get(), *pwalletMain, reservekey);
- SetThreadPriority(THREAD_PRIORITY_LOWEST);
- }
- Sleep(500);
- continue;
- }
- }
-}
-
git://git.novaco.in / novacoin.git / blobdiff