style: extract common functionality to increase readability

miner/worker.go

@@ -288,6 +288,29 @@ func (w *worker) close() {
 	close(w.exitCh)
 }
 
+// recalcRecommit recalculates the resubmitting interval upon feedback.
+// @target is the dration vale (time.Duration as floating point) where we want to go.
+func recalcRecommit(minRecommit, prev time.Duration, target float64, inc bool) time.Duration {
+	var (
+		prevF = float64(prev.Nanoseconds())
+		next  float64
+	)
+	if inc {
+		next = prevF*(1-intervalAdjustRatio) + intervalAdjustRatio*(target+intervalAdjustBias)
+		max := float64(maxRecommitInterval.Nanoseconds())
+		if next > max {
+			next = max
+		}
+	} else {
+		next = prevF*(1-intervalAdjustRatio) + intervalAdjustRatio*(target-intervalAdjustBias)
+		min := float64(minRecommit.Nanoseconds())
+		if next < min {
+			next = min
+		}
+	}
+	return time.Duration(int64(next))
+}
+
 // newWorkLoop is a standalone goroutine to submit new mining work upon received events.
 func (w *worker) newWorkLoop(recommit time.Duration) {
 	var (
@@ -310,27 +333,6 @@ func (w *worker) newWorkLoop(recommit time.Duration) {
 		timer.Reset(recommit)
 		atomic.StoreInt32(&w.newTxs, 0)
 	}
-	// recalcRecommit recalculates the resubmitting interval upon feedback.
-	recalcRecommit := func(target float64, inc bool) {
-		var (
-			prev = float64(recommit.Nanoseconds())
-			next float64
-		)
-		if inc {
-			next = prev*(1-intervalAdjustRatio) + intervalAdjustRatio*(target+intervalAdjustBias)
-			// Recap if interval is larger than the maximum time interval
-			if next > float64(maxRecommitInterval.Nanoseconds()) {
-				next = float64(maxRecommitInterval.Nanoseconds())
-			}
-		} else {
-			next = prev*(1-intervalAdjustRatio) + intervalAdjustRatio*(target-intervalAdjustBias)
-			// Recap if interval is less than the user specified minimum
-			if next < float64(minRecommit.Nanoseconds()) {
-				next = float64(minRecommit.Nanoseconds())
-			}
-		}
-		recommit = time.Duration(int64(next))
-	}
 	// clearPending cleans the stale pending tasks.
 	clearPending := func(number uint64) {
 		w.pendingMu.Lock()
@@ -383,11 +385,12 @@ func (w *worker) newWorkLoop(recommit time.Duration) {
 			// Adjust resubmit interval by feedback.
 			if adjust.inc {
 				before := recommit
-				recalcRecommit(float64(recommit.Nanoseconds())/adjust.ratio, true)
+				target := float64(recommit.Nanoseconds()) / adjust.ratio
+				recommit = recalcRecommit(minRecommit, recommit, target, true)
 				log.Trace("Increase miner recommit interval", "from", before, "to", recommit)
 			} else {
 				before := recommit
-				recalcRecommit(float64(minRecommit.Nanoseconds()), false)
+				recommit = recalcRecommit(minRecommit, recommit, float64(minRecommit.Nanoseconds()), false)
 				log.Trace("Decrease miner recommit interval", "from", before, "to", recommit)
 			}
 
@@ -535,7 +538,7 @@ func (w *worker) taskLoop() {
 				continue
 			}
 			w.pendingMu.Lock()
-			w.pendingTasks[w.engine.SealHash(task.block.Header())] = task
+			w.pendingTasks[sealHash] = task
 			w.pendingMu.Unlock()
 
 			if err := w.engine.Seal(w.chain, task.block, w.resultCh, stopCh); err != nil {
@@ -954,13 +957,9 @@ func (w *worker) commitNewWork(interrupt *int32, noempty bool, timestamp int64)
 // and commits new work if consensus engine is running.
 func (w *worker) commit(uncles []*types.Header, interval func(), update bool, start time.Time) error {
 	// Deep copy receipts here to avoid interaction between different tasks.
-	receipts := make([]*types.Receipt, len(w.current.receipts))
+	receipts := w.copyCurrentReceipts()
-	for i, l := range w.current.receipts {
-		receipts[i] = new(types.Receipt)
-		*receipts[i] = *l
-	}
 	s := w.current.state.Copy()
-	block, err := w.engine.FinalizeAndAssemble(w.chain, w.current.header, s, w.current.txs, uncles, w.current.receipts)
+	block, err := w.engine.FinalizeAndAssemble(w.chain, w.current.header, s, w.current.txs, uncles, receipts)
 	if err != nil {
 		return err
 	}
@@ -971,15 +970,10 @@ func (w *worker) commit(uncles []*types.Header, interval func(), update bool, st
 		select {
 		case w.taskCh <- &task{receipts: receipts, state: s, block: block, createdAt: time.Now()}:
 			w.unconfirmed.Shift(block.NumberU64() - 1)
-
-			feesWei := new(big.Int)
-			for i, tx := range block.Transactions() {
-				feesWei.Add(feesWei, new(big.Int).Mul(new(big.Int).SetUint64(receipts[i].GasUsed), tx.GasPrice()))
-			}
-			feesEth := new(big.Float).Quo(new(big.Float).SetInt(feesWei), new(big.Float).SetInt(big.NewInt(params.Ether)))
-
 			log.Info("Commit new mining work", "number", block.Number(), "sealhash", w.engine.SealHash(block.Header()),
-				"uncles", len(uncles), "txs", w.current.tcount, "gas", block.GasUsed(), "fees", feesEth, "elapsed", common.PrettyDuration(time.Since(start)))
+				"uncles", len(uncles), "txs", w.current.tcount,
+				"gas", block.GasUsed(), "fees", totalFees(block, receipts),
+				"elapsed", common.PrettyDuration(time.Since(start)))
 
 		case <-w.exitCh:
 			log.Info("Worker has exited")
@@ -991,6 +985,17 @@ func (w *worker) commit(uncles []*types.Header, interval func(), update bool, st
 	return nil
 }
 
+// deep copy current receipts. This is should be used whene an asynchronus process can modify
+// current context.
+func (w *worker) copyCurrentReceipts() []*types.Receipt {
+	receipts := make([]*types.Receipt, len(w.current.receipts))
+	for i, l := range w.current.receipts {
+		cpy := *l
+		receipts[i] = &cpy
+	}
+	return receipts
+}
+
 // postSideBlock fires a side chain event, only use it for testing.
 func (w *worker) postSideBlock(event core.ChainSideEvent) {
 	select {
@@ -998,3 +1003,12 @@ func (w *worker) postSideBlock(event core.ChainSideEvent) {
 	case <-w.exitCh:
 	}
 }
+
+// computes total consumed fees in ETH. Block transactions and receipts have to have the same order.
+func totalFees(block *types.Block, receipts []*types.Receipt) *big.Float {
+	feesWei := new(big.Int)
+	for i, tx := range block.Transactions() {
+		feesWei.Add(feesWei, new(big.Int).Mul(new(big.Int).SetUint64(receipts[i].GasUsed), tx.GasPrice()))
+	}
+	return new(big.Float).Quo(new(big.Float).SetInt(feesWei), new(big.Float).SetInt(big.NewInt(params.Ether)))
+}