/// <summary>
/// Constructs a transaction memory pool entry.
/// </summary>
/// <param name="transaction">Transaction for the entry.</param>
/// <param name="nFee">Fee for the transaction in the entry in the memory pool.</param>
/// <param name="nTime">The local time when entering the memory pool.</param>
/// <param name="entryPriority">Priority when entering the memory pool.</param>
/// <param name="entryHeight">The chain height when entering the mempool.</param>
/// <param name="inChainInputValue">The sum of all txin values that are already in blockchain.</param>
/// <param name="spendsCoinbase">Whether the transaction spends a coinbase.</param>
/// <param name="nSigOpsCost">The total signature operations cost.</param>
/// <param name="lp">Tthe lock points that track the height and time at which tx was final.</param>
/// <param name="consensusOptions">Proof of work consensus options used to compute transaction weight and modified size.</param>
public TxMempoolEntry(Transaction transaction, Money nFee,
long nTime, double entryPriority, int entryHeight,
Money inChainInputValue, bool spendsCoinbase,
long nSigOpsCost, LockPoints lp, PowConsensusOptions consensusOptions)
{
this.Transaction = transaction;
this.TransactionHash = transaction.GetHash();
this.Fee = nFee;
this.Time = nTime;
this.entryPriority = entryPriority;
this.EntryHeight = entryHeight;
this.InChainInputValue = inChainInputValue;
this.SpendsCoinbase = spendsCoinbase;
this.SigOpCost = nSigOpsCost;
this.LockPoints = lp;
this.TxWeight = MempoolValidator.GetTransactionWeight(transaction, consensusOptions);
this.nModSize = MempoolValidator.CalculateModifiedSize(this.Transaction.GetSerializedSize(), this.Transaction, consensusOptions);
this.nUsageSize = transaction.GetSerializedSize(); // RecursiveDynamicUsage(*tx) + memusage::DynamicUsage(Transaction);
this.CountWithDescendants = 1;
this.SizeWithDescendants = this.GetTxSize();
this.ModFeesWithDescendants = this.Fee;
Money nValueIn = transaction.TotalOut + this.Fee;
Guard.Assert(this.InChainInputValue <= nValueIn);
this.feeDelta = 0;
this.CountWithAncestors = 1;
this.SizeWithAncestors = this.GetTxSize();
this.ModFeesWithAncestors = this.Fee;
this.SigOpCostWithAncestors = this.SigOpCost;
}
/// <summary>
/// Calculates the priority of a transaction based upon transaction size and priority inputs.
/// </summary>
/// <param name="trx">Memory pool transaction.</param>
/// <param name="dPriorityInputs">Priority weighting of inputs.</param>
/// <param name="nTxSize">Transaction size, 0 will compute.</param>
/// <returns>Priority value.</returns>
private double ComputePriority(Transaction trx, double dPriorityInputs, int nTxSize = 0)
{
nTxSize = MempoolValidator.CalculateModifiedSize(nTxSize, trx, this.mempoolValidator.ConsensusOptions);
if (nTxSize == 0)
{
return(0.0);
}
return(dPriorityInputs / nTxSize);
}
