}
}
+void CWallet::AvailableCoinsMinConf(vector<COutput>& vCoins, int nConf) const
+{
+ vCoins.clear();
+
+ {
+ LOCK(cs_wallet);
+ for (map<uint256, CWalletTx>::const_iterator it = mapWallet.begin(); it != mapWallet.end(); ++it)
+ {
+ const CWalletTx* pcoin = &(*it).second;
+
+ if (!pcoin->IsFinal())
+ continue;
+
+ if(pcoin->GetDepthInMainChain() < nConf)
+ continue;
+
+ for (unsigned int i = 0; i < pcoin->vout.size(); i++)
+ if (!(pcoin->IsSpent(i)) && IsMine(pcoin->vout[i]) && pcoin->vout[i].nValue >= nMinimumInputValue)
+ vCoins.push_back(COutput(pcoin, i, pcoin->GetDepthInMainChain()));
+ }
+ }
+}
+
static void ApproximateBestSubset(vector<pair<int64, pair<const CWalletTx*,unsigned int> > >vValue, int64 nTotalLower, int64 nTargetValue,
vector<char>& vfBest, int64& nBest, int iterations = 1000)
{
int i = output.i;
+ // Follow the timestamp rules
if (pcoin->nTime > nSpendTime)
- continue; // ppcoin: timestamp must not exceed spend time
+ continue;
int64 n = pcoin->vout[i].nValue;
SelectCoinsMinConf(nTargetValue, nSpendTime, 0, 1, vCoins, setCoinsRet, nValueRet));
}
+// Select some coins without random shuffle or best subset approximation
+bool CWallet::SelectCoinsSimple(int64 nTargetValue, unsigned int nSpendTime, int nMinConf, set<pair<const CWalletTx*,unsigned int> >& setCoinsRet, int64& nValueRet) const
+{
+ vector<COutput> vCoins;
+ AvailableCoinsMinConf(vCoins, nMinConf);
+
+ setCoinsRet.clear();
+ nValueRet = 0;
+
+ BOOST_FOREACH(COutput output, vCoins)
+ {
+ const CWalletTx *pcoin = output.tx;
+ int i = output.i;
+
+ // Stop if we've chosen enough inputs
+ if (nValueRet >= nTargetValue)
+ break;
+
+ // Follow the timestamp rules
+ if (pcoin->nTime > nSpendTime)
+ continue;
+
+ int64 n = pcoin->vout[i].nValue;
+
+ pair<int64,pair<const CWalletTx*,unsigned int> > coin = make_pair(n,make_pair(pcoin, i));
+
+ if (n >= nTargetValue)
+ {
+ // If input value is greater or equal to target then simply insert
+ // it into the current subset and exit
+ setCoinsRet.insert(coin.second);
+ nValueRet += coin.first;
+ break;
+ }
+ else if (n < nTargetValue + CENT)
+ {
+ setCoinsRet.insert(coin.second);
+ nValueRet += coin.first;
+ }
+ }
+
+ return true;
+}
+
bool CWallet::CreateTransaction(const vector<pair<CScript, int64> >& vecSend, CWalletTx& wtxNew, CReserveKey& reservekey, int64& nFeeRet, const CCoinControl* coinControl)
{
int64 nValue = 0;
}
// NovaCoin: get current stake weight
-uint64 CWallet::GetStakeWeight(const CKeyStore& keystore, enum StakeWeightMode mode)
+bool CWallet::GetStakeWeight(const CKeyStore& keystore, uint64& nMinWeight, uint64& nMaxWeight, uint64& nWeight)
{
- LOCK2(cs_main, cs_wallet);
-
// Choose coins to use
int64 nBalance = GetBalance();
int64 nReserveBalance = 0;
- uint64 nCoinAge = 0;
if (mapArgs.count("-reservebalance") && !ParseMoney(mapArgs["-reservebalance"], nReserveBalance))
{
error("GetStakeWeight : invalid reserve balance amount");
- return 0;
+ return false;
}
if (nBalance <= nReserveBalance)
- return 0;
+ return false;
- set<pair<const CWalletTx*,unsigned int> > setCoins;
vector<const CWalletTx*> vwtxPrev;
+
+/*
+ * TODO: performance comparison
+
+ static set<pair<const CWalletTx*,unsigned int> > setCoins;
+ static uint256 hashPrevBlock;
+ static int64 nValueIn = 0;
+
+ // Cache outputs unless best block changed
+ if (hashPrevBlock != pindexBest->GetBlockHash())
+ {
+ if (!SelectCoinsSimple(nBalance - nReserveBalance, GetAdjustedTime(), nCoinbaseMaturity * 10, setCoins, nValueIn))
+ return false;
+
+ if (setCoins.empty())
+ return false;
+
+ hashPrevBlock == pindexBest->GetBlockHash();
+ }
+*/
+
+ set<pair<const CWalletTx*,unsigned int> > setCoins;
int64 nValueIn = 0;
- if (!SelectCoins(nBalance - nReserveBalance, GetTime(), setCoins, nValueIn))
- return 0;
+
+ if (!SelectCoinsSimple(nBalance - nReserveBalance, GetTime(), nCoinbaseMaturity * 10, setCoins, nValueIn))
+ return false;
+
if (setCoins.empty())
- return 0;
+ return false;
+ CTxDB txdb("r");
BOOST_FOREACH(PAIRTYPE(const CWalletTx*, unsigned int) pcoin, setCoins)
{
- CTxDB txdb("r");
CTxIndex txindex;
- if (!txdb.ReadTxIndex(pcoin.first->GetHash(), txindex))
- continue;
-
- unsigned int nTime = pcoin.first->nTime;
-
- switch(mode)
{
- case STAKE_NORMAL:
- // Do not count input that is still less than 30 days old
- if (nTime + nStakeMinAge > GetTime())
- continue;
- break;
- case STAKE_MAXWEIGHT:
- // Do not count input that is still less than 90 days old
- if (nTime + nStakeMaxAge > GetTime())
- continue;
- break;
- case STAKE_MINWEIGHT:
- // Count only inputs with suitable age (from 30 to 90 days old)
- if (nTime + nStakeMaxAge < GetTime())
- continue;
- if (nTime + nStakeMinAge > GetTime())
- continue;
- break;
+ LOCK2(cs_main, cs_wallet);
+ if (!txdb.ReadTxIndex(pcoin.first->GetHash(), txindex))
+ continue;
}
- int64 nTimeWeight;
+ unsigned int nTime = pcoin.first->nTime;
// Kernel hash weight starts from 0 at the 30-day min age
// this change increases active coins participating the hash and helps
// to secure the network when proof-of-stake difficulty is low
//
// Maximum TimeWeight is 90 days.
- nTimeWeight = min((int64)GetTime() - nTime - nStakeMinAge, (int64)nStakeMaxAge);
-
+ int64 nTimeWeight = min((int64)GetTime() - nTime - nStakeMinAge, (int64)nStakeMaxAge);
CBigNum bnCoinDayWeight = CBigNum(pcoin.first->vout[pcoin.second].nValue) * nTimeWeight / COIN / (24 * 60 * 60);
- nCoinAge += bnCoinDayWeight.getuint64();
- }
+ // Count input that is more than 90 days old
+ if (nTime + nStakeMaxAge < GetTime())
+ {
+ nMaxWeight += bnCoinDayWeight.getuint64();
+ nWeight += bnCoinDayWeight.getuint64();
+ }
- if (fDebug && GetBoolArg("-printcoinage"))
- printf("StakeWeight bnCoinDay=%"PRI64d"\n", nCoinAge);
+ // Count input that is more than 30 days old and less than 90 days old
+ if (nTime + nStakeMinAge < GetTime() && nTime + nStakeMaxAge > GetTime())
+ {
+ nMinWeight += bnCoinDayWeight.getuint64();
+ nWeight += bnCoinDayWeight.getuint64();
+ }
+ }
- return nCoinAge;
+ return true;
}
-// ppcoin: create coin stake transaction
-bool CWallet::CreateCoinStake(const CKeyStore& keystore, unsigned int nBits, int64 nSearchInterval, CTransaction& txNew)
+bool CWallet::CreateCoinStake(const CKeyStore& keystore, unsigned int nBits, int64 nSearchInterval, CTransaction& txNew, CKey& key)
{
// The following split & combine thresholds are important to security
// Should not be adjusted if you don't understand the consequences
CBigNum bnTargetPerCoinDay;
bnTargetPerCoinDay.SetCompact(nBits);
- LOCK2(cs_main, cs_wallet);
txNew.vin.clear();
txNew.vout.clear();
+
// Mark coin stake transaction
CScript scriptEmpty;
scriptEmpty.clear();
txNew.vout.push_back(CTxOut(0, scriptEmpty));
+
// Choose coins to use
int64 nBalance = GetBalance();
int64 nReserveBalance = 0;
+
if (mapArgs.count("-reservebalance") && !ParseMoney(mapArgs["-reservebalance"], nReserveBalance))
return error("CreateCoinStake : invalid reserve balance amount");
+
if (nBalance <= nReserveBalance)
return false;
- set<pair<const CWalletTx*,unsigned int> > setCoins;
+
vector<const CWalletTx*> vwtxPrev;
+
+/*
+ * TODO: performance comparison
+
+ static set<pair<const CWalletTx*,unsigned int> > setCoins;
+ static uint256 hashPrevBlock;
+ static int64 nValueIn = 0;
+
+ // Cache outputs unless best block changed
+ if (hashPrevBlock != pindexBest->GetBlockHash())
+ {
+ if (!SelectCoinsSimple(nBalance - nReserveBalance, txNew.nTime, nCoinbaseMaturity * 10, setCoins, nValueIn))
+ return false;
+
+ if (setCoins.empty())
+ return false;
+
+ hashPrevBlock == pindexBest->GetBlockHash();
+ }
+*/
+
+ set<pair<const CWalletTx*,unsigned int> > setCoins;
int64 nValueIn = 0;
- if (!SelectCoins(nBalance - nReserveBalance, txNew.nTime, setCoins, nValueIn))
+
+ // Select coins with suitable depth
+ if (!SelectCoinsSimple(nBalance - nReserveBalance, txNew.nTime, nCoinbaseMaturity * 10, setCoins, nValueIn))
return false;
+
if (setCoins.empty())
return false;
+
int64 nCredit = 0;
CScript scriptPubKeyKernel;
+ CTxDB txdb("r");
BOOST_FOREACH(PAIRTYPE(const CWalletTx*, unsigned int) pcoin, setCoins)
{
- CTxDB txdb("r");
CTxIndex txindex;
- if (!txdb.ReadTxIndex(pcoin.first->GetHash(), txindex))
- continue;
+ {
+ LOCK2(cs_main, cs_wallet);
+ if (!txdb.ReadTxIndex(pcoin.first->GetHash(), txindex))
+ continue;
+ }
// Read block header
CBlock block;
- if (!block.ReadFromDisk(txindex.pos.nFile, txindex.pos.nBlockPos, false))
- continue;
+ {
+ LOCK2(cs_main, cs_wallet);
+ if (!block.ReadFromDisk(txindex.pos.nFile, txindex.pos.nBlockPos, false))
+ continue;
+ }
+
static int nMaxStakeSearchInterval = 60;
if (block.GetBlockTime() + nStakeMinAge > txNew.nTime - nMaxStakeSearchInterval)
continue; // only count coins meeting min age requirement
if (whichType == TX_PUBKEYHASH) // pay to address type
{
// convert to pay to public key type
- CKey key;
if (!keystore.GetKey(uint160(vSolutions[0]), key))
{
if (fDebug && GetBoolArg("-printcoinstake"))
}
scriptPubKeyOut << key.GetPubKey() << OP_CHECKSIG;
}
- else
+ if (whichType == TX_PUBKEY)
+ {
+ valtype& vchPubKey = vSolutions[0];
+ if (!keystore.GetKey(Hash160(vchPubKey), key))
+ {
+ if (fDebug && GetBoolArg("-printcoinstake"))
+ printf("CreateCoinStake : failed to get key for kernel type=%d\n", whichType);
+ break; // unable to find corresponding public key
+ }
+
+ if (key.GetPubKey() != vchPubKey)
+ {
+ if (fDebug && GetBoolArg("-printcoinstake"))
+ printf("CreateCoinStake : invalid key for kernel type=%d\n", whichType);
+ break; // keys mismatch
+ }
+
scriptPubKeyOut = scriptPubKeyKernel;
+ }
- txNew.nTime -= n;
+ txNew.nTime -= n;
txNew.vin.push_back(CTxIn(pcoin.first->GetHash(), pcoin.second));
nCredit += pcoin.first->vout[pcoin.second].nValue;
vwtxPrev.push_back(pcoin.first);
break;
}
}
+
if (fKernelFound || fShutdown)
break; // if kernel is found stop searching
}
+
if (nCredit == 0 || nCredit > nBalance - nReserveBalance)
return false;
+
BOOST_FOREACH(PAIRTYPE(const CWalletTx*, unsigned int) pcoin, setCoins)
{
// Attempt to add more inputs
vwtxPrev.push_back(pcoin.first);
}
}
+
// Calculate coin age reward
{
uint64 nCoinAge;
git://git.novaco.in / novacoin.git / blobdiff