Golang MsgBlock.Header方法代码示例

//.........这里部分代码省略.........

		// Calculate the final transaction priority using the input
		// value age sum as well as the adjusted transaction size.  The
		// formula is: sum(inputValue * inputAge) / adjustedTxSize
		txSize := tx.MsgTx().SerializeSize()
		prioItem.priority = calcPriority(tx, txSize, inputValueAge)

		// Calculate the fee in Satoshi/KB.
		// NOTE: This is a more precise value than the one calculated
		// during calcMinRelayFee which rounds up to the nearest full
		// kilobyte boundary.  This is beneficial since it provides an
		// incentive to create smaller transactions.
		prioItem.feePerKB = float64(txDesc.Fee) / (float64(txSize) / 1000)
		prioItem.fee = txDesc.Fee

		// Add the transaction to the priority queue to mark it ready
		// for inclusion in the block unless it has dependencies.
		if prioItem.dependsOn == nil {
			heap.Push(priorityQueue, prioItem)
		}

		// Merge the store which contains all of the input transactions
		// for this transaction into the input transaction store.  This
		// allows the code below to avoid a second lookup.
		mergeTxStore(blockTxStore, txStore)
	}

	minrLog.Tracef("Priority queue len %d, dependers len %d",
		priorityQueue.Len(), len(dependers))

	// The starting block size is the size of the block header plus the max
	// possible transaction count size, plus the size of the coinbase
	// transaction.
	blockSize := blockHeaderOverhead + uint32(coinbaseTx.MsgTx().SerializeSize())
	blockSigOps := numCoinbaseSigOps
	totalFees := int64(0)

	// Choose which transactions make it into the block.
	for priorityQueue.Len() > 0 {
		// Grab the highest priority (or highest fee per kilobyte
		// depending on the sort order) transaction.
		prioItem := heap.Pop(priorityQueue).(*txPrioItem)
		tx := prioItem.tx

		// Grab the list of transactions which depend on this one (if
		// any) and remove the entry for this transaction as it will
		// either be included or skipped, but in either case the deps
		// are no longer needed.
		deps := dependers[*tx.Sha()]
		delete(dependers, *tx.Sha())

		// Enforce maximum block size.  Also check for overflow.
		txSize := uint32(tx.MsgTx().SerializeSize())
		blockPlusTxSize := blockSize + txSize
		if blockPlusTxSize < blockSize || blockPlusTxSize >= cfg.BlockMaxSize {
			minrLog.Tracef("Skipping tx %s because it would exceed "+
				"the max block size", tx.Sha())
			logSkippedDeps(tx, deps)
			continue
		}

		// Enforce maximum signature operations per block.  Also check
		// for overflow.
		numSigOps := int64(btcchain.CountSigOps(tx))
		if blockSigOps+numSigOps < blockSigOps ||
			blockSigOps+numSigOps > btcchain.MaxSigOpsPerBlock {