public ConsensusStats(CoinViewStack stack, CoinView coinView, ConsensusLoop consensusLoop, ChainBehavior.ChainState chainState, ConcurrentChain chain, IConnectionManager connectionManager)
{
stack = new CoinViewStack(coinView);
this.cache = stack.Find <CachedCoinView>();
this.dbreeze = stack.Find <DBreezeCoinView>();
this.bottom = stack.Bottom;
this.consensusLoop = consensusLoop;
this.lookaheadPuller = this.consensusLoop.Puller as LookaheadBlockPuller;
this.lastSnapshot = consensusLoop.Validator.PerformanceCounter.Snapshot();
this.lastSnapshot2 = this.dbreeze?.PerformanceCounter.Snapshot();
this.lastSnapshot3 = this.cache?.PerformanceCounter.Snapshot();
this.chainState = chainState;
this.chain = chain;
this.connectionManager = connectionManager;
}
// ppcoin: total coin age spent in transaction, in the unit of coin-days.
// Only those coins meeting minimum age requirement counts. As those
// transactions not in main chain are not currently indexed so we
// might not find out about their coin age. Older transactions are
// guaranteed to be in main chain by sync-checkpoint. This rule is
// introduced to help nodes establish a consistent view of the coin
// age (trust score) of competing branches.
public bool GetCoinAge(ConcurrentChain chain, CachedCoinView cachedCoinView,
Transaction trx, ChainedBlock pindexPrev, out ulong nCoinAge)
{
BigInteger bnCentSecond = BigInteger.Zero; // coin age in the unit of cent-seconds
nCoinAge = 0;
if (trx.IsCoinBase)
{
return(true);
}
foreach (var txin in trx.Inputs)
{
var coins = cachedCoinView.FetchCoinsAsync(new[] { txin.PrevOut.Hash }).GetAwaiter().GetResult();
if (coins == null || coins.UnspentOutputs.Length != 1)
{
continue;
}
var prevBlock = chain.GetBlock(coins.BlockHash);
var prevUtxo = coins.UnspentOutputs[0];
// First try finding the previous transaction in database
//Transaction txPrev = trasnactionStore.Get(txin.PrevOut.Hash);
//if (txPrev == null)
// continue; // previous transaction not in main chain
if (trx.Time < prevUtxo.Time)
{
return(false); // Transaction timestamp violation
}
if (IsProtocolV3((int)trx.Time))
{
if (IsConfirmedInNPrevBlocks(prevUtxo, pindexPrev, this.consensusOptions.StakeMinConfirmations - 1))
{
//LogPrint("coinage", "coin age skip nSpendDepth=%d\n", nSpendDepth + 1);
continue; // only count coins meeting min confirmations requirement
}
}
else
{
// Read block header
//var block = blockStore.GetBlock(txPrev.GetHash());
//if (block == null)
// return false; // unable to read block of previous transaction
if (prevBlock.Header.Time + this.consensusOptions.StakeMinAge > trx.Time)
{
continue; // only count coins meeting min age requirement
}
}
long nValueIn = prevUtxo._Outputs[txin.PrevOut.N].Value;
var multiplier = BigInteger.ValueOf((trx.Time - prevUtxo.Time) / Money.CENT);
bnCentSecond = bnCentSecond.Add(BigInteger.ValueOf(nValueIn).Multiply(multiplier));
//bnCentSecond += new BigInteger(nValueIn) * (trx.Time - txPrev.Time) / CENT;
//LogPrint("coinage", "coin age nValueIn=%d nTimeDiff=%d bnCentSecond=%s\n", nValueIn, nTime - txPrev.nTime, bnCentSecond.ToString());
}
BigInteger bnCoinDay = bnCentSecond.Multiply(BigInteger.ValueOf(Money.CENT / Money.COIN / (24 * 60 * 60)));
//BigInteger bnCoinDay = bnCentSecond * CENT / COIN / (24 * 60 * 60);
//LogPrint("coinage", "coin age bnCoinDay=%s\n", bnCoinDay.ToString());
nCoinAge = new Target(bnCoinDay).ToCompact();
return(true);
}
