map<uint256, CBlockIndex*> mapBlockIndex;
set<pair<COutPoint, unsigned int> > setStakeSeen;
-static CBigNum bnProofOfWorkLimit(~uint256(0) >> 20);
-static CBigNum bnProofOfStakeLimit(~uint256(0) >> 24);
-static CBigNum bnProofOfStakeHardLimit(~uint256(0) >> 30); // disabled temporarily, will be used in the future to fix minimum PoS difficulty at 0.25
+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
-static CBigNum bnProofOfWorkLimitTestNet(~uint256(0) >> 16);
-static CBigNum bnProofOfStakeLimitTestNet(~uint256(0) >> 20);
+CBigNum bnProofOfWorkLimitTestNet(~uint256(0) >> 16);
-unsigned int nStakeMinAge = 60 * 60 * 24 * 30; // minimum age for coin age
-unsigned int nStakeMaxAge = 60 * 60 * 24 * 90; // stake age of full weight
-unsigned int nStakeTargetSpacing = 10 * 60; // 10-minute block spacing
+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 nStakeTargetSpacing = 10 * 60; // 10-minute stakes spacing
unsigned int nModifierInterval = 6 * 60 * 60; // time to elapse before new modifier is computed
int nCoinbaseMaturity = 500;
if (txout.IsEmpty() && !IsCoinBase() && !IsCoinStake())
return DoS(100, error("CTransaction::CheckTransaction() : txout empty for user transaction"));
- // ppcoin: enforce minimum output amount
- if ((!txout.IsEmpty()) && txout.nValue < MIN_TXOUT_AMOUNT)
+ // 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 > MAX_MONEY)
if (IsCoinBase())
{
if (vin[0].scriptSig.size() < 2 || vin[0].scriptSig.size() > 100)
- return DoS(100, error("CTransaction::CheckTransaction() : coinbase script size"));
+ return DoS(100, error("CTransaction::CheckTransaction() : coinbase script size is invalid"));
}
else
{
return pblockOrphan->hashPrevBlock;
}
+// select stake target limit according to hard-coded conditions
+CBigNum static GetProofOfStakeLimit(int nHeight, unsigned int nTime)
+{
+ if(fTestNet) // separate proof of stake target limit for testnet
+ return bnProofOfStakeLimit;
+ if(nTime > TARGETS_SWITCH_TIME) // 27 bits since 20 July 2013
+ return bnProofOfStakeLimit;
+ if(nHeight + 1 > 15000) // 24 bits since block 15000
+ return bnProofOfStakeLegacyLimit;
+ if(nHeight + 1 > 14060) // 31 bits since block 14060 until 15000
+ return bnProofOfStakeHardLimit;
+
+ return bnProofOfWorkLimit; // return bnProofOfWorkLimit of none matched
+}
+
// miner's coin base reward based on nBits
int64 GetProofOfWorkReward(unsigned int nBits)
{
CBigNum bnSubsidyLimit = MAX_MINT_PROOF_OF_WORK;
+
CBigNum bnTarget;
bnTarget.SetCompact(nBits);
CBigNum bnTargetLimit = bnProofOfWorkLimit;
}
int64 nSubsidy = bnUpperBound.getuint64();
+
nSubsidy = (nSubsidy / CENT) * CENT;
if (fDebug && GetBoolArg("-printcreation"))
printf("GetProofOfWorkReward() : create=%s nBits=0x%08x nSubsidy=%"PRI64d"\n", FormatMoney(nSubsidy).c_str(), nBits, nSubsidy);
{
int64 nRewardCoinYear;
- if(fTestNet || nTime > PROTOCOL_SWITCH_TIME)
+ if(fTestNet || nTime > STAKE_SWITCH_TIME)
{
// Stage 2 of emission process is PoS-based. It will be active on mainNet since 20 Jun 2013.
CBigNum bnRewardCoinYearLimit = MAX_MINT_PROOF_OF_STAKE; // Base stake mint rate, 100% year interest
CBigNum bnTarget;
bnTarget.SetCompact(nBits);
- CBigNum bnTargetLimit = bnProofOfStakeLimit;
+ CBigNum bnTargetLimit = GetProofOfStakeLimit(0, nTime);
bnTargetLimit.SetCompact(bnTargetLimit.GetCompact());
// NovaCoin: reward for coin-year is cut in half every 64x multiply of PoS difficulty
}
static const int64 nTargetTimespan = 7 * 24 * 60 * 60; // one week
-static const int64 nTargetSpacingWorkMax = 12 * nStakeTargetSpacing; // 2-hour
+
+// get proof of work blocks max spacing according to hard-coded conditions
+int64 static GetTargetSpacingWorkMax(int nHeight, unsigned int nTime)
+{
+ if(nTime > TARGETS_SWITCH_TIME)
+ return 3 * nStakeTargetSpacing; // 30 minutes on mainNet since 20 Jul 2013 00:00:00
+
+ if(fTestNet)
+ return 3 * nStakeTargetSpacing; // 15 minutes on testNet
+
+ return 12 * nStakeTargetSpacing; // 2 hours otherwise
+}
//
// minimum amount of work that could possibly be required nTime after
return pindex;
}
-unsigned int static GetNextTargetRequired(const CBlockIndex* pindexLast, bool fProofOfStake)
+unsigned int GetNextTargetRequired(const CBlockIndex* pindexLast, bool fProofOfStake)
{
- CBigNum bnTargetLimit = bnProofOfWorkLimit;
-
- if(fProofOfStake)
- {
- // Proof-of-Stake blocks has own target limit since nVersion=3 supermajority on mainNet and always on testNet
- if(fTestNet)
- bnTargetLimit = bnProofOfStakeLimit;
- else
- {
- if(pindexLast->nHeight + 1 > 15000)
- bnTargetLimit = bnProofOfStakeLimit;
- else if(pindexLast->nHeight + 1 > 14060)
- bnTargetLimit = bnProofOfStakeHardLimit;
- }
- }
+ CBigNum bnTargetLimit = !fProofOfStake ? bnProofOfWorkLimit : GetProofOfStakeLimit(pindexLast->nHeight, pindexLast->nTime);
if (pindexLast == NULL)
return bnTargetLimit.GetCompact(); // genesis block
// ppcoin: retarget with exponential moving toward target spacing
CBigNum bnNew;
bnNew.SetCompact(pindexPrev->nBits);
- int64 nTargetSpacing = fProofOfStake? nStakeTargetSpacing : min(nTargetSpacingWorkMax, (int64) nStakeTargetSpacing * (1 + pindexLast->nHeight - pindexPrev->nHeight));
+ int64 nTargetSpacing = fProofOfStake? nStakeTargetSpacing : min(GetTargetSpacingWorkMax(pindexLast->nHeight, pindexLast->nTime), (int64) nStakeTargetSpacing * (1 + pindexLast->nHeight - pindexPrev->nHeight));
int64 nInterval = nTargetTimespan / nTargetSpacing;
bnNew *= ((nInterval - 1) * nTargetSpacing + nActualSpacing + nActualSpacing);
bnNew /= ((nInterval + 1) * nTargetSpacing);
uiInterface.NotifyBlocksChanged();
}
- printf("InvalidChainFound: invalid block=%s height=%d trust=%s date=%s\n",
+ CBigNum bnBestInvalidBlockTrust = pindexNew->bnChainTrust - pindexNew->pprev->bnChainTrust;
+ CBigNum bnBestBlockTrust = pindexBest->nHeight != 0 ? (pindexBest->bnChainTrust - pindexBest->pprev->bnChainTrust) : pindexBest->bnChainTrust;
+
+ printf("InvalidChainFound: invalid block=%s height=%d trust=%s blocktrust=%s date=%s\n",
pindexNew->GetBlockHash().ToString().substr(0,20).c_str(), pindexNew->nHeight,
- pindexNew->bnChainTrust.ToString().c_str(), DateTimeStrFormat("%x %H:%M:%S",
- pindexNew->GetBlockTime()).c_str());
- printf("InvalidChainFound: current best=%s height=%d trust=%s date=%s\n",
- hashBestChain.ToString().substr(0,20).c_str(), nBestHeight, bnBestChainTrust.ToString().c_str(),
+ pindexNew->bnChainTrust.ToString().c_str(), bnBestInvalidBlockTrust.ToString().c_str(),
+ 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(),
DateTimeStrFormat("%x %H:%M:%S", pindexBest->GetBlockTime()).c_str());
}
+
void CBlock::UpdateTime(const CBlockIndex* pindexPrev)
{
nTime = max(GetBlockTime(), GetAdjustedTime());
bnBestChainTrust = pindexNew->bnChainTrust;
nTimeBestReceived = GetTime();
nTransactionsUpdated++;
- printf("SetBestChain: new best=%s height=%d trust=%s date=%s\n",
+
+ CBigNum bnBestBlockTrust = pindexBest->nHeight != 0 ? (pindexBest->bnChainTrust - pindexBest->pprev->bnChainTrust) : pindexBest->bnChainTrust;
+
+ 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(),
DateTimeStrFormat("%x %H:%M:%S", pindexBest->GetBlockTime()).c_str());
// Check the version of the last 100 blocks to see if we need to upgrade:
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");
+ }
+
// Check proof of work matches claimed amount
if (fCheckPOW && IsProofOfWork() && !CheckProofOfWork(GetHash(), nBits))
return DoS(50, error("CheckBlock() : proof of work failed"));
if (vtx[i].IsCoinBase())
return DoS(100, error("CheckBlock() : more than one coinbase"));
- // ppcoin: only the second transaction can be the optional coinstake
- for (unsigned int i = 2; i < vtx.size(); i++)
- if (vtx[i].IsCoinStake())
- return DoS(100, error("CheckBlock() : coinstake in wrong position"));
-
- // ppcoin: coinbase output should be empty if proof-of-stake block
- if (IsProofOfStake() && (vtx[0].vout.size() != 1 || !vtx[0].vout[0].IsEmpty()))
- return error("CheckBlock() : coinbase output not empty for proof-of-stake block");
-
// Check coinbase timestamp
if (GetBlockTime() > (int64)vtx[0].nTime + nMaxClockDrift)
return DoS(50, error("CheckBlock() : coinbase timestamp is too early"));
- // Check coinstake timestamp
- if (IsProofOfStake() && !CheckCoinStakeTimestamp(GetBlockTime(), (int64)vtx[1].nTime))
- return DoS(50, error("CheckBlock() : coinstake timestamp violation nTimeBlock=%"PRI64d" nTimeTx=%u", GetBlockTime(), vtx[1].nTime));
+ if (IsProofOfStake())
+ {
+ // ppcoin: 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");
+
+ // Second transaction must be coinstake, the rest must not be
+ if (vtx.empty() || !vtx[1].IsCoinStake())
+ return DoS(100, error("CheckBlock() : second tx is not coinstake"));
+ for (unsigned int i = 2; i < vtx.size(); i++)
+ if (vtx[i].IsCoinStake())
+ return DoS(100, error("CheckBlock() : more than one coinstake"));
+
+ // Check coinstake timestamp
+ if (!CheckCoinStakeTimestamp(GetBlockTime(), (int64)vtx[1].nTime))
+ return DoS(50, error("CheckBlock() : coinstake timestamp violation nTimeBlock=%"PRI64d" nTimeTx=%u", GetBlockTime(), vtx[1].nTime));
+ }
+ else
+ {
+ // Coinbase fee paid until 20 Sep 2013
+ int64 nFee = GetBlockTime() < CHAINCHECKS_SWITCH_TIME ? vtx[0].GetMinFee() - MIN_TX_FEE : 0;
- // Check coinbase reward
- if (vtx[0].GetValueOut() > (IsProofOfWork()? (GetProofOfWorkReward(nBits) - vtx[0].GetMinFee() + MIN_TX_FEE) : 0))
- return DoS(50, error("CheckBlock() : coinbase reward exceeded %s > %s",
+ // 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(IsProofOfWork()? GetProofOfWorkReward(nBits) : 0).c_str()));
+ FormatMoney(GetProofOfWorkReward(nBits) - nFee).c_str()));
+ }
// Check transactions
BOOST_FOREACH(const CTransaction& tx, vtx)
if (fCheckMerkleRoot && hashMerkleRoot != BuildMerkleTree())
return DoS(100, error("CheckBlock() : hashMerkleRoot mismatch"));
- // ppcoin: check block signature
- if (!CheckBlockSignature())
- return DoS(100, error("CheckBlock() : bad block signature"));
+ // 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 true;
}
+CBigNum CBlockIndex::GetBlockTrust() const
+{
+ CBigNum bnTarget;
+
+ // Old protocol
+ if (!fTestNet && GetBlockTime() < CHAINCHECKS_SWITCH_TIME)
+ {
+ CBigNum bnTarget;
+ bnTarget.SetCompact(nBits);
+
+ if (bnTarget <= 0)
+ return 0;
+ return (IsProofOfStake()? (CBigNum(1)<<256) / (bnTarget+1) : 1);
+ }
+
+ // New protocol
+ if (pprev == NULL || pprev->nHeight < 10)
+ return 1;
+
+ const CBlockIndex* currentIndex = pprev;
+
+ if(IsProofOfStake())
+ {
+ bnTarget.SetCompact(nBits);
+ if (bnTarget <= 0)
+ return 0;
+
+ if (!pprev->IsProofOfWork())
+ return (CBigNum(1)<<256) / (3 * (bnTarget+1));
+
+ int nPoWCount = 0;
+
+ // Check last 12 blocks type
+ while (pprev->nHeight - currentIndex->nHeight < 12)
+ {
+ if (currentIndex->IsProofOfWork())
+ nPoWCount++;
+ currentIndex = currentIndex->pprev;
+ }
+
+ // Return 1/3 of score if less than 3 PoW blocks found
+ if (nPoWCount < 3)
+ return (CBigNum(1)<<256) / (3 * (bnTarget+1));
+
+ return (CBigNum(1)<<256) / (bnTarget+1);
+ }
+ else
+ {
+ if (!(pprev->IsProofOfStake() && pprev->pprev->IsProofOfStake()))
+ return 1 + (2 * (pprev->bnChainTrust - pprev->pprev->bnChainTrust) / 3);
+
+ int nPoSCount = 0;
+
+ // Check last 12 blocks type
+ while (pprev->nHeight - currentIndex->nHeight < 12)
+ {
+ if (currentIndex->IsProofOfStake())
+ nPoSCount++;
+ currentIndex = currentIndex->pprev;
+ }
+
+ // Return 2/3 of previous block score if less than 7 PoS blocks found
+ if (nPoSCount < 7)
+ return 1 + (2 * (pprev->bnChainTrust - pprev->pprev->bnChainTrust) / 3);
+
+ return (pprev->bnChainTrust - pprev->pprev->bnChainTrust);
+ }
+}
+
bool CBlockIndex::IsSuperMajority(int minVersion, const CBlockIndex* pstart, unsigned int nRequired, unsigned int nToCheck)
{
unsigned int nFound = 0;
pchMessageStart[2] = 0xc0;
pchMessageStart[3] = 0xef;
- bnProofOfStakeLimit = bnProofOfStakeLimitTestNet; // 0x00000fff PoS base target is fixed in testnet
- bnProofOfWorkLimit = bnProofOfWorkLimitTestNet; // 0x0000ffff PoW base target is fixed in testnet
+ 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 = 3 * 60; // test block spacing is 3 minutes
+ nStakeTargetSpacing = 5 * 60; // test block spacing is 5 minutes
}
//
if (!fAllowNew)
return false;
- // Genesis Block:
- // CBlock(hash=000000000019d6, ver=1, hashPrevBlock=00000000000000, hashMerkleRoot=4a5e1e, nTime=1231006505, nBits=1d00ffff, nNonce=2083236893, vtx=1)
- // CTransaction(hash=4a5e1e, ver=1, vin.size=1, vout.size=1, nLockTime=0)
- // CTxIn(COutPoint(000000, -1), coinbase 04ffff001d0104455468652054696d65732030332f4a616e2f32303039204368616e63656c6c6f72206f6e206272696e6b206f66207365636f6e64206261696c6f757420666f722062616e6b73)
- // CTxOut(nValue=50.00000000, scriptPubKey=0x5F1DF16B2B704C8A578D0B)
- // vMerkleTree: 4a5e1e
-
// Genesis block
+
+ // MainNet:
+
+ //CBlock(hash=00000a060336cbb72fe969666d337b87198b1add2abaa59cca226820b32933a4, ver=1, hashPrevBlock=0000000000000000000000000000000000000000000000000000000000000000, hashMerkleRoot=4cb33b3b6a861dcbc685d3e614a9cafb945738d6833f182855679f2fad02057b, nTime=1360105017, nBits=1e0fffff, nNonce=1575379, vtx=1, vchBlockSig=)
+ // Coinbase(hash=4cb33b3b6a, nTime=1360105017, ver=1, vin.size=1, vout.size=1, nLockTime=0)
+ // CTxIn(COutPoint(0000000000, 4294967295), coinbase 04ffff001d020f274468747470733a2f2f626974636f696e74616c6b2e6f72672f696e6465782e7068703f746f7069633d3133343137392e6d736731353032313936236d736731353032313936)
+ // CTxOut(empty)
+ // vMerkleTree: 4cb33b3b6a
+
+ // TestNet:
+
+ //CBlock(hash=0000c763e402f2436da9ed36c7286f62c3f6e5dbafce9ff289bd43d7459327eb, ver=1, hashPrevBlock=0000000000000000000000000000000000000000000000000000000000000000, hashMerkleRoot=4cb33b3b6a861dcbc685d3e614a9cafb945738d6833f182855679f2fad02057b, nTime=1360105017, nBits=1f00ffff, nNonce=46534, vtx=1, vchBlockSig=)
+ // Coinbase(hash=4cb33b3b6a, nTime=1360105017, ver=1, vin.size=1, vout.size=1, nLockTime=0)
+ // CTxIn(COutPoint(0000000000, 4294967295), coinbase 04ffff001d020f274468747470733a2f2f626974636f696e74616c6b2e6f72672f696e6465782e7068703f746f7069633d3133343137392e6d736731353032313936236d736731353032313936)
+ // CTxOut(empty)
+ // vMerkleTree: 4cb33b3b6a
+
const char* pszTimestamp = "https://bitcointalk.org/index.php?topic=134179.msg1502196#msg1502196";
CTransaction txNew;
txNew.nTime = 1360105017;
// 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);
return true;
}
-void static ThreadBitcoinMiner(void* parg);
-
-static bool fGenerateBitcoins = false;
-static bool fLimitProcessors = false;
-static int nLimitProcessors = -1;
-
void BitcoinMiner(CWallet *pwallet, bool fProofOfStake)
{
- void *scratchbuf = scrypt_buffer_alloc();
-
- printf("CPUMiner started for proof-of-%s\n", fProofOfStake? "stake" : "work");
SetThreadPriority(THREAD_PRIORITY_LOWEST);
// Make this thread recognisable as the mining thread
CReserveKey reservekey(pwallet);
unsigned int nExtraNonce = 0;
- while (fGenerateBitcoins || fProofOfStake)
+ while (fProofOfStake)
{
if (fShutdown)
return;
Sleep(1000);
if (fShutdown)
return;
- if ((!fGenerateBitcoins) && !fProofOfStake)
+ if (!fProofOfStake)
return;
}
//
// Create new block
//
- unsigned int nTransactionsUpdatedLast = nTransactionsUpdated;
CBlockIndex* pindexPrev = pindexBest;
auto_ptr<CBlock> pblock(CreateNewBlock(pwallet, fProofOfStake));
continue;
}
strMintWarning = "";
- printf("CPUMiner : proof-of-stake block found %s\n", pblock->GetHash().ToString().c_str());
+ 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;
}
-
- printf("Running BitcoinMiner with %"PRIszu" transactions in block (%u bytes)\n", pblock->vtx.size(),
- ::GetSerializeSize(*pblock, SER_NETWORK, PROTOCOL_VERSION));
-
- //
- // Pre-build hash buffers
- //
- char pmidstatebuf[32+16]; char* pmidstate = alignup<16>(pmidstatebuf);
- char pdatabuf[128+16]; char* pdata = alignup<16>(pdatabuf);
- char phash1buf[64+16]; char* phash1 = alignup<16>(phash1buf);
-
- FormatHashBuffers(pblock.get(), pmidstate, pdata, phash1);
-
- unsigned int& nBlockTime = *(unsigned int*)(pdata + 64 + 4);
- unsigned int& nBlockNonce = *(unsigned int*)(pdata + 64 + 12);
-
-
- //
- // Search
- //
- int64 nStart = GetTime();
- uint256 hashTarget = CBigNum().SetCompact(pblock->nBits).getuint256();
-
- unsigned int max_nonce = 0xffff0000;
- block_header res_header;
- uint256 result;
-
- loop
- {
- unsigned int nHashesDone = 0;
- unsigned int nNonceFound;
-
- nNonceFound = scanhash_scrypt(
- (block_header *)&pblock->nVersion,
- scratchbuf,
- max_nonce,
- nHashesDone,
- UBEGIN(result),
- &res_header
- );
-
- // Check if something found
- if (nNonceFound != (unsigned int) -1)
- {
- if (result <= hashTarget)
- {
- // Found a solution
- pblock->nNonce = nNonceFound;
- assert(result == pblock->GetHash());
- if (!pblock->SignBlock(*pwalletMain))
- {
-// strMintWarning = strMintMessage;
- break;
- }
- strMintWarning = "";
-
- SetThreadPriority(THREAD_PRIORITY_NORMAL);
- CheckWork(pblock.get(), *pwalletMain, reservekey);
- SetThreadPriority(THREAD_PRIORITY_LOWEST);
- break;
- }
- }
-
- // Meter hashes/sec
- static int64 nHashCounter;
- if (nHPSTimerStart == 0)
- {
- nHPSTimerStart = GetTimeMillis();
- nHashCounter = 0;
- }
- else
- nHashCounter += nHashesDone;
- if (GetTimeMillis() - nHPSTimerStart > 4000)
- {
- static CCriticalSection cs;
- {
- LOCK(cs);
- if (GetTimeMillis() - nHPSTimerStart > 4000)
- {
- dHashesPerSec = 1000.0 * nHashCounter / (GetTimeMillis() - nHPSTimerStart);
- nHPSTimerStart = GetTimeMillis();
- nHashCounter = 0;
- static int64 nLogTime;
- if (GetTime() - nLogTime > 30 * 60)
- {
- nLogTime = GetTime();
- printf("hashmeter %3d CPUs %6.0f khash/s\n", vnThreadsRunning[THREAD_MINER], dHashesPerSec/1000.0);
- }
- }
- }
- }
-
- // Check for stop or if block needs to be rebuilt
- if (fShutdown)
- return;
- if (!fGenerateBitcoins)
- return;
- if (fLimitProcessors && vnThreadsRunning[THREAD_MINER] > nLimitProcessors)
- return;
- if (vNodes.empty())
- break;
- if (nBlockNonce >= 0xffff0000)
- break;
- if (nTransactionsUpdated != nTransactionsUpdatedLast && GetTime() - nStart > 60)
- break;
- if (pindexPrev != pindexBest)
- break;
-
- // Update nTime every few seconds
- pblock->nTime = max(pindexPrev->GetMedianTimePast()+1, pblock->GetMaxTransactionTime());
- pblock->nTime = max(pblock->GetBlockTime(), pindexPrev->GetBlockTime() - nMaxClockDrift);
- pblock->UpdateTime(pindexPrev);
- nBlockTime = ByteReverse(pblock->nTime);
-
- if (pblock->GetBlockTime() >= (int64)pblock->vtx[0].nTime + nMaxClockDrift)
- break; // need to update coinbase timestamp
- }
}
-
- scrypt_buffer_free(scratchbuf);
}
-void static ThreadBitcoinMiner(void* parg)
-{
- CWallet* pwallet = (CWallet*)parg;
- try
- {
- vnThreadsRunning[THREAD_MINER]++;
- BitcoinMiner(pwallet, false);
- vnThreadsRunning[THREAD_MINER]--;
- }
- catch (std::exception& e) {
- vnThreadsRunning[THREAD_MINER]--;
- PrintException(&e, "ThreadBitcoinMiner()");
- } catch (...) {
- vnThreadsRunning[THREAD_MINER]--;
- PrintException(NULL, "ThreadBitcoinMiner()");
- }
- nHPSTimerStart = 0;
- if (vnThreadsRunning[THREAD_MINER] == 0)
- dHashesPerSec = 0;
- printf("ThreadBitcoinMiner exiting, %d threads remaining\n", vnThreadsRunning[THREAD_MINER]);
-}
-
-
-void GenerateBitcoins(bool fGenerate, CWallet* pwallet)
-{
- fGenerateBitcoins = fGenerate;
- nLimitProcessors = GetArg("-genproclimit", -1);
- if (nLimitProcessors == 0)
- fGenerateBitcoins = false;
- fLimitProcessors = (nLimitProcessors != -1);
-
- if (fGenerate)
- {
- int nProcessors = boost::thread::hardware_concurrency();
- printf("%d processors\n", nProcessors);
- if (nProcessors < 1)
- nProcessors = 1;
- if (fLimitProcessors && nProcessors > nLimitProcessors)
- nProcessors = nLimitProcessors;
- int nAddThreads = nProcessors - vnThreadsRunning[THREAD_MINER];
- printf("Starting %d BitcoinMiner threads\n", nAddThreads);
- for (int i = 0; i < nAddThreads; i++)
- {
- if (!NewThread(ThreadBitcoinMiner, pwallet))
- printf("Error: NewThread(ThreadBitcoinMiner) failed\n");
- Sleep(10);
- }
- }
-}
git://git.novaco.in / novacoin.git / blobdiff