//Add the next 20 mints to the mint pool
void CzPIVWallet::GenerateMintPool(uint32_t nCountStart, uint32_t nCountEnd)
{
//Is locked
if (seedMaster == 0)
return;
uint32_t n = nCountLastUsed + 1;
if (nCountStart > 0)
n = nCountStart;
uint32_t nStop = n + 20;
if (nCountEnd > 0)
nStop = std::max(n, n + nCountEnd);
bool fFound;
uint256 hashSeed = Hash(seedMaster.begin(), seedMaster.end());
LogPrintf("%s : n=%d nStop=%d\n", __func__, n, nStop - 1);
for (uint32_t i = n; i < nStop; ++i) {
if (ShutdownRequested())
return;
fFound = false;
// Prevent unnecessary repeated minted
for (auto& pair : mintPool) {
if(pair.second == i) {
fFound = true;
break;
}
}
if(fFound)
continue;
uint512 seedZerocoin = GetZerocoinSeed(i);
CBigNum bnValue;
CBigNum bnSerial;
CBigNum bnRandomness;
CKey key;
SeedToZPIV(seedZerocoin, bnValue, bnSerial, bnRandomness, key);
mintPool.Add(bnValue, i);
CWalletDB(strWalletFile).WriteMintPoolPair(hashSeed, GetPubCoinHash(bnValue), i);
LogPrintf("%s : %s count=%d\n", __func__, bnValue.GetHex().substr(0, 6), i);
}
}
/// This function has changed as it served two purposes: sanity check for headers and real proof of work check. We only need the proofOfWorkLimit for the latter
/// For namecoin we allow merged mining for the PoW!
const bool NamecoinChain::checkProofOfWork(const Block& block) const {
log_trace("Enter %s (block.version = %d)", __FUNCTION__, block.getVersion());
// we accept aux pow all the time - the lockins will ensure we get the right chain
// Prevent same work from being submitted twice:
// - this block must have our chain ID
// - parent block must not have the same chain ID (see CAuxPow::Check)
// - index of this chain in chain merkle tree must be pre-determined (see CAuxPow::Check)
// if (nHeight != INT_MAX && GetChainID() != GetOurChainID())
// return error("CheckProofOfWork() : block does not have our chain ID");
CBigNum target;
target.SetCompact(block.getBits());
if (proofOfWorkLimit() != 0 && (target <= 0 || target > proofOfWorkLimit())) {
cout << target.GetHex() << endl;
cout << proofOfWorkLimit().GetHex() << endl;
log_error("CheckProofOfWork() : nBits below minimum work");
return false;
}
if (block.getVersion()&BLOCK_VERSION_AUXPOW) {
if (!block.getAuxPoW().Check(block.getHash(), block.getVersion()/BLOCK_VERSION_CHAIN_START)) {
log_error("CheckProofOfWork() : AUX POW is not valid");
return false;
}
// Check proof of work matches claimed amount
if (block.getAuxPoW().GetParentBlockHash() > target.getuint256()) {
log_error("CheckProofOfWork() : AUX proof of work failed");
return false;
}
}
else {
// Check proof of work matches claimed amount
if (block.getHash() > target.getuint256()) {
log_error("CheckProofOfWork() : proof of work failed");
return false;
}
}
log_trace("Return(true): %s", __FUNCTION__);
return true;
}
void CMintPool::Remove(const CBigNum& bnValue)
{
Remove(GetPubCoinHash(bnValue));
LogPrintf("%s : remove %s from mint pool\n", __func__, bnValue.GetHex().substr(0, 6));
}
void CMintPool::Add(const CBigNum& bnValue, const uint32_t& nCount)
{
uint256 hash = GetPubCoinHash(bnValue);
Add(make_pair(hash, nCount));
LogPrintf("%s : add %s to mint pool, nCountLastGenerated=%d\n", __func__, bnValue.GetHex().substr(0, 6), nCountLastGenerated);
}
bool CreateCoinStake( CBlock &blocknew, CKey &key,
vector<const CWalletTx*> &StakeInputs, uint64_t &CoinAge,
CWallet &wallet, CBlockIndex* pindexPrev )
{
int64_t CoinWeight;
CBigNum StakeKernelHash;
CTxDB txdb("r");
int64_t StakeWeightSum = 0;
double StakeValueSum = 0;
int64_t StakeWeightMin=MAX_MONEY;
int64_t StakeWeightMax=0;
uint64_t StakeCoinAgeSum=0;
double StakeDiffSum = 0;
double StakeDiffMax = 0;
CTransaction &txnew = blocknew.vtx[1]; // second tx is coinstake
//initialize the transaction
txnew.nTime = blocknew.nTime & (~STAKE_TIMESTAMP_MASK);
txnew.vin.clear();
txnew.vout.clear();
// Choose coins to use
set <pair <const CWalletTx*,unsigned int> > CoinsToStake;
int64_t BalanceToStake = wallet.GetBalance();
int64_t nValueIn = 0;
//Request all the coins here, check reserve later
if ( BalanceToStake<=0
|| !wallet.SelectCoinsForStaking(BalanceToStake*2, txnew.nTime, CoinsToStake, nValueIn) )
{
LOCK(MinerStatus.lock);
MinerStatus.ReasonNotStaking+=_("No coins; ");
if (fDebug) LogPrintf("CreateCoinStake: %s",MinerStatus.ReasonNotStaking);
return false;
}
BalanceToStake -= nReserveBalance;
if(fDebug2) LogPrintf("\nCreateCoinStake: Staking nTime/16= %d Bits= %u",
txnew.nTime/16,blocknew.nBits);
for(const auto& pcoin : CoinsToStake)
{
const CTransaction &CoinTx =*pcoin.first; //transaction that produced this coin
unsigned int CoinTxN =pcoin.second; //index of this coin inside it
CTxIndex txindex;
{
LOCK2(cs_main, wallet.cs_wallet);
if (!txdb.ReadTxIndex(pcoin.first->GetHash(), txindex))
continue; //error?
}
CBlock CoinBlock; //Block which contains CoinTx
{
LOCK2(cs_main, wallet.cs_wallet);
if (!CoinBlock.ReadFromDisk(txindex.pos.nFile, txindex.pos.nBlockPos, false))
continue;
}
// only count coins meeting min age requirement
if (CoinBlock.GetBlockTime() + nStakeMinAge > txnew.nTime)
continue;
if (CoinTx.vout[CoinTxN].nValue > BalanceToStake)
continue;
{
int64_t nStakeValue= CoinTx.vout[CoinTxN].nValue;
StakeValueSum += nStakeValue /(double)COIN;
//crazy formula...
// todo: clean this
// todo reuse calculated value for interst
CBigNum bn = CBigNum(nStakeValue) * (blocknew.nTime-CoinTx.nTime) / CENT;
bn = bn * CENT / COIN / (24 * 60 * 60);
StakeCoinAgeSum += bn.getuint64();
}
if(blocknew.nVersion==7)
{
NetworkTimer();
CoinWeight = CalculateStakeWeightV3(CoinTx,CoinTxN,GlobalCPUMiningCPID);
StakeKernelHash= CalculateStakeHashV3(CoinBlock,CoinTx,CoinTxN,txnew.nTime,GlobalCPUMiningCPID,mdPORNonce);
}
else
{
uint64_t StakeModifier = 0;
if(!FindStakeModifierRev(StakeModifier,pindexPrev))
continue;
CoinWeight = CalculateStakeWeightV8(CoinTx,CoinTxN,GlobalCPUMiningCPID);
StakeKernelHash= CalculateStakeHashV8(CoinBlock,CoinTx,CoinTxN,txnew.nTime,StakeModifier,GlobalCPUMiningCPID);
}
CBigNum StakeTarget;
StakeTarget.SetCompact(blocknew.nBits);
StakeTarget*=CoinWeight;
StakeWeightSum += CoinWeight;
StakeWeightMin=std::min(StakeWeightMin,CoinWeight);
StakeWeightMax=std::max(StakeWeightMax,CoinWeight);
double StakeKernelDiff = GetBlockDifficulty(StakeKernelHash.GetCompact())*CoinWeight;
StakeDiffSum += StakeKernelDiff;
StakeDiffMax = std::max(StakeDiffMax,StakeKernelDiff);
if (fDebug2) {
int64_t RSA_WEIGHT = GetRSAWeightByBlock(GlobalCPUMiningCPID);
LogPrintf(
"CreateCoinStake: V%d Time %.f, Por_Nonce %.f, Bits %jd, Weight %jd\n"
" RSA_WEIGHT %.f\n"
" Stk %72s\n"
" Trg %72s\n"
" Diff %0.7f of %0.7f\n",
blocknew.nVersion,
(double)txnew.nTime, mdPORNonce,
(intmax_t)blocknew.nBits,(intmax_t)CoinWeight,
(double)RSA_WEIGHT,
StakeKernelHash.GetHex().c_str(), StakeTarget.GetHex().c_str(),
StakeKernelDiff, GetBlockDifficulty(blocknew.nBits)
);
}
if( StakeKernelHash <= StakeTarget )
{
// Found a kernel
LogPrintf("\nCreateCoinStake: Found Kernel;\n");
blocknew.nNonce= mdPORNonce;
vector<valtype> vSolutions;
txnouttype whichType;
CScript scriptPubKeyOut;
CScript scriptPubKeyKernel;
scriptPubKeyKernel = CoinTx.vout[CoinTxN].scriptPubKey;
if (!Solver(scriptPubKeyKernel, whichType, vSolutions))
{
LogPrintf("CreateCoinStake: failed to parse kernel\n");
break;
}
if (whichType == TX_PUBKEYHASH) // pay to address type
{
// convert to pay to public key type
if (!wallet.GetKey(uint160(vSolutions[0]), key))
{
LogPrintf("CreateCoinStake: failed to get key for kernel type=%d\n", whichType);
break; // unable to find corresponding public key
}
scriptPubKeyOut << key.GetPubKey() << OP_CHECKSIG;
}
else if (whichType == TX_PUBKEY) // pay to public key type
{
valtype& vchPubKey = vSolutions[0];
if (!wallet.GetKey(Hash160(vchPubKey), key)
|| key.GetPubKey() != vchPubKey)
{
LogPrintf("CreateCoinStake: failed to get key for kernel type=%d\n", whichType);
break; // unable to find corresponding public key
}
scriptPubKeyOut = scriptPubKeyKernel;
}
else
{
LogPrintf("CreateCoinStake: no support for kernel type=%d\n", whichType);
break; // only support pay to public key and pay to address
}
txnew.vin.push_back(CTxIn(CoinTx.GetHash(), CoinTxN));
StakeInputs.push_back(pcoin.first);
if (!txnew.GetCoinAge(txdb, CoinAge))
return error("CreateCoinStake: failed to calculate coin age");
int64_t nCredit = CoinTx.vout[CoinTxN].nValue;
txnew.vout.push_back(CTxOut(0, CScript())); // First Must be empty
txnew.vout.push_back(CTxOut(nCredit, scriptPubKeyOut));
//txnew.vout.push_back(CTxOut(0, scriptPubKeyOut));
LogPrintf("CreateCoinStake: added kernel type=%d credit=%f\n", whichType,CoinToDouble(nCredit));
LOCK(MinerStatus.lock);
MinerStatus.KernelsFound++;
MinerStatus.KernelDiffMax = 0;
MinerStatus.KernelDiffSum = StakeDiffSum;
return true;
}
}
LOCK(MinerStatus.lock);
MinerStatus.WeightSum = StakeWeightSum;
MinerStatus.ValueSum = StakeValueSum;
MinerStatus.WeightMin=StakeWeightMin;
MinerStatus.WeightMax=StakeWeightMax;
MinerStatus.CoinAgeSum=StakeCoinAgeSum;
MinerStatus.KernelDiffMax = std::max(MinerStatus.KernelDiffMax,StakeDiffMax);
MinerStatus.KernelDiffSum = StakeDiffSum;
MinerStatus.nLastCoinStakeSearchInterval= txnew.nTime;
return false;
}