Queued approach to delivering chain events

miner/miner.go

@@ -30,6 +30,7 @@ func New(coinbase []byte, eth core.Backend, pow pow.PoW, minerThreads int) *Mine
 		pow:      pow,
 	}
 
+	minerThreads = 1
 	for i := 0; i < minerThreads; i++ {
 		miner.worker.register(NewCpuMiner(i, miner.pow))
 	}

miner/worker.go

@@ -116,7 +116,7 @@ func (self *worker) register(agent Agent) {
 }
 
 func (self *worker) update() {
-	events := self.mux.Subscribe(core.ChainEvent{}, core.NewMinedBlockEvent{})
+	events := self.mux.Subscribe(core.ChainHeadEvent{}, core.NewMinedBlockEvent{})
 
 	timer := time.NewTicker(2 * time.Second)
 
@@ -125,7 +125,7 @@ out:
 		select {
 		case event := <-events.Chan():
 			switch ev := event.(type) {
-			case core.ChainEvent:
+			case core.ChainHeadEvent:
 				if self.current.block != ev.Block {
 					self.commitNewWork()
 				}