miner: provide coinbase when starting the miner

This avoids having to query the coinbase when creating the miner, which
in turn eliminates the dreaded startup error when no accounts are set
up. Later, this will also allow us to simply restart the miner when the
user picks a different coinbase.

This causes a lot of changes in other packages. These are included in
this commit because they're impossible to separate.

cmd/ethereum/js.go

@@ -249,12 +249,14 @@ func (self *jsre) dump(call otto.FunctionCall) otto.Value {
 }
 
 func (self *jsre) stopMining(call otto.FunctionCall) otto.Value {
-	self.xeth.Miner().Stop()
+	self.ethereum.StopMining()
 	return otto.TrueValue()
 }
 
 func (self *jsre) startMining(call otto.FunctionCall) otto.Value {
-	self.xeth.Miner().Start()
+	if err := self.ethereum.StartMining(); err != nil {
+		return otto.FalseValue()
+	}
 	return otto.TrueValue()
 }
 

cmd/ethereum/main.go

@@ -214,7 +214,7 @@ func startEth(ctx *cli.Context, eth *eth.Ethereum) {
 		utils.StartRPC(eth, ctx)
 	}
 	if ctx.GlobalBool(utils.MiningEnabledFlag.Name) {
-		eth.Miner().Start()
+		eth.StartMining()
 	}
 }
 

cmd/mist/assets/qml/views/miner.qml

@@ -55,8 +55,8 @@ Rectangle {
 					Button {
 						text: "Start"
 						onClicked: {
-							eth.setGasPrice(minGasPrice.text || "10000000000000");
-							eth.setExtra(blockExtra.text)
+							// eth.setGasPrice(minGasPrice.text || "10000000000000");
+							// eth.setExtra(blockExtra.text)
 							if (eth.toggleMining()) {
 								this.text = "Stop";
 							} else {
@@ -65,35 +65,35 @@ Rectangle {
 						}
 					}
 
-					Rectangle {
-						id: minGasPriceRect
-						anchors.top: parent.top
-						anchors.topMargin: 2
-						width: 200
-						TextField {
-							id: minGasPrice
-							placeholderText: "Min Gas: 10000000000000"
-							width: 200
-							validator: RegExpValidator { regExp: /\d*/ }
-						}
-					}
+					// Rectangle {
+					// 	id: minGasPriceRect
+					// 	anchors.top: parent.top
+					// 	anchors.topMargin: 2
+					// 	width: 200
+					// 	TextField {
+					// 		id: minGasPrice
+					// 		placeholderText: "Min Gas: 10000000000000"
+					// 		width: 200
+					// 		validator: RegExpValidator { regExp: /\d*/ }
+					// 	}
+					// }
 
-					Rectangle {
-						width: 300
-						anchors {
-							left: minGasPriceRect.right
-							leftMargin: 5
-							top: parent.top
-							topMargin: 2
-						}
+					// Rectangle {
+					// 	width: 300
+					// 	anchors {
+					// 		left: minGasPriceRect.right
+					// 		leftMargin: 5
+					// 		top: parent.top
+					// 		topMargin: 2
+					// 	}
 
-						TextField {
-							id: blockExtra
-							placeholderText: "Extra"
-							width: parent.width
-							maximumLength: 1024
-						}
-					}
+					// 	TextField {
+					// 		id: blockExtra
+					// 		placeholderText: "Extra"
+					// 		width: parent.width
+					// 		maximumLength: 1024
+					// 	}
+					// }
 				}
 			}
 

cmd/mist/assets/qml/views/network.qml

@@ -93,7 +93,6 @@ Rectangle {
 	         			// Check if it's mining and set it accordingly       				
          				if (miningSliderValue > 0 && !eth.miner().mining()) {
 							// If the 
-							eth.setGasPrice("10000000000000");
 	         				eth.miner().start();
 	         			} else if (miningSliderValue == 0 && eth.miner().mining()) {
 	         				eth.miner().stop();

cmd/mist/ui_lib.go

@@ -175,22 +175,12 @@ func (self *UiLib) RemoveLocalTransaction(id int) {
 	//self.miner.RemoveLocalTx(id)
 }
 
-func (self *UiLib) SetGasPrice(price string) {
-	self.Miner().MinAcceptedGasPrice = ethutil.Big(price)
-}
-
-func (self *UiLib) SetExtra(extra string) {
-	self.Miner().Extra = extra
-}
-
 func (self *UiLib) ToggleMining() bool {
-	if !self.Miner().Mining() {
-		self.Miner().Start()
-
-		return true
+	if !self.eth.IsMining() {
+		err := self.eth.StartMining()
+		return err == nil
 	} else {
-		self.Miner().Stop()
-
+		self.eth.StopMining()
 		return false
 	}
 }