Merge branch 'release/0.6.0'

README.md

@@ -5,7 +5,7 @@ Ethereum
 
 Ethereum Go Client © 2014 Jeffrey Wilcke.
 
-Current state: Proof of Concept 0.5.16.
+Current state: Proof of Concept 0.6.0.
 
 For the development package please see the [eth-go package](https://github.com/ethereum/eth-go).
 

ethereal/assets/qml/wallet.qml

@@ -249,6 +249,8 @@ ApplicationWindow {
 					}
 					TextField {
 						text: eth.getCustomIdentifier()
+						width: 500
+						placeholderText: "Anonymous"
 						onTextChanged: {
 							eth.setCustomIdentifier(text)
 						}
@@ -419,30 +421,54 @@ ApplicationWindow {
 			}
 		}
 
-		Label {
-			y: 7
-			anchors.right: peerImage.left
-			anchors.rightMargin: 5
-			id: peerLabel
-			font.pixelSize: 8
-			text: "0 / 0"
-		}
-		Image {
-			y: 7
-			id: peerImage
-			anchors.right: parent.right
-			width: 10; height: 10
-			MouseArea {
-				onDoubleClicked:  peerWindow.visible = true
-				anchors.fill: parent
-			}
-			source: "../network.png"
-		}
+        Label {
+            y: 6
+            id: lastBlockLabel
+            objectName: "lastBlockLabel"
+            visible: true
+            text: ""
+			font.pixelSize: 10
+            anchors.right: peerGroup.left
+            anchors.rightMargin: 5
+        }
+
+        ProgressBar {
+            id: syncProgressIndicator
+            visible: false
+            objectName: "syncProgressIndicator"
+            y: 3
+            width: 140
+            indeterminate: true
+            anchors.right: peerGroup.left
+            anchors.rightMargin: 5
+        }
+
+        RowLayout {
+            id: peerGroup
+            y: 7
+            anchors.right: parent.right
+            MouseArea {
+                onDoubleClicked:  peerWindow.visible = true
+                anchors.fill: parent
+            }
+
+            Label {
+                id: peerLabel
+                font.pixelSize: 8
+                text: "0 / 0"
+            }
+            Image {
+                id: peerImage
+                width: 10; height: 10
+                source: "../network.png"
+            }
+        }
 	}
 
 	Window {
 		id: popup
 		visible: false
+        //flags: Qt.CustomizeWindowHint | Qt.Tool | Qt.WindowCloseButtonHint
 		property var block
 		width: root.width
 		height: 300
@@ -460,7 +486,7 @@ ApplicationWindow {
 					Text { text: '<h3>Block details</h3>'; color: "#F2F2F2"}
 					Text { text: '<b>Block number:</b> ' + number; color: "#F2F2F2"}
 					Text { text: '<b>Hash:</b> ' + hash; color: "#F2F2F2"}
-					Text { text: '<b>Coinbase:</b> ' + coinbase; color: "#F2F2F2"}
+					Text { text: '<b>Coinbase:</b> &lt;' + name + '&gt; ' + coinbase; color: "#F2F2F2"}
 					Text { text: '<b>Block found at:</b> ' + prettyTime; color: "#F2F2F2"}
 					Text { text: '<b>Gas used:</b> ' + gasUsed + " / " + gasLimit; color: "#F2F2F2"}
 				}
@@ -577,6 +603,7 @@ ApplicationWindow {
 
 	Window {
 		id: addPeerWin
+        //flags: Qt.CustomizeWindowHint | Qt.Tool | Qt.WindowCloseButtonHint
 		visible: false
 		minimumWidth: 230
 		maximumWidth: 230
@@ -686,9 +713,9 @@ ApplicationWindow {
 		}
 
 		if(initial){
-			blockModel.append({number: block.number, gasLimit: block.gasLimit, gasUsed: block.gasUsed, coinbase: block.coinbase, hash: block.hash, txs: txs, txAmount: amount, time: block.time, prettyTime: convertToPretty(block.time)})
+			blockModel.append({number: block.number, name: block.name, gasLimit: block.gasLimit, gasUsed: block.gasUsed, coinbase: block.coinbase, hash: block.hash, txs: txs, txAmount: amount, time: block.time, prettyTime: convertToPretty(block.time)})
 		}else{
-			blockModel.insert(0, {number: block.number, gasLimit: block.gasLimit, gasUsed: block.gasUsed, coinbase: block.coinbase, hash: block.hash, txs: txs, txAmount: amount, time: block.time, prettyTime: convertToPretty(block.time)})
+			blockModel.insert(0, {number: block.number, name: block.name, gasLimit: block.gasLimit, gasUsed: block.gasUsed, coinbase: block.coinbase, hash: block.hash, txs: txs, txAmount: amount, time: block.time, prettyTime: convertToPretty(block.time)})
 		}
 	}
 
@@ -743,6 +770,7 @@ ApplicationWindow {
 	// ******************************************
 	Window {
 		id: peerWindow
+        //flags: Qt.CustomizeWindowHint | Qt.Tool | Qt.WindowCloseButtonHint
 		height: 200
 		width: 700
 		Rectangle {

ethereal/debugger.go

@@ -3,7 +3,10 @@ package main
 import (
 	"fmt"
 	"github.com/ethereum/eth-go/ethchain"
+	"github.com/ethereum/eth-go/ethstate"
 	"github.com/ethereum/eth-go/ethutil"
+	"github.com/ethereum/eth-go/ethvm"
+	"github.com/ethereum/go-ethereum/utils"
 	"github.com/go-qml/qml"
 	"math/big"
 	"strconv"
@@ -15,8 +18,10 @@ type DebuggerWindow struct {
 	engine *qml.Engine
 	lib    *UiLib
 
-	vm *ethchain.Vm
+	vm *ethvm.Vm
 	Db *Debugger
+
+	state *ethstate.State
 }
 
 func NewDebuggerWindow(lib *UiLib) *DebuggerWindow {
@@ -30,7 +35,7 @@ func NewDebuggerWindow(lib *UiLib) *DebuggerWindow {
 
 	win := component.CreateWindow(nil)
 
-	w := &DebuggerWindow{engine: engine, win: win, lib: lib, vm: &ethchain.Vm{}}
+	w := &DebuggerWindow{engine: engine, win: win, lib: lib, vm: &ethvm.Vm{}}
 	w.Db = NewDebugger(w)
 
 	return w
@@ -53,6 +58,7 @@ func (self *DebuggerWindow) SetCode(code string) {
 func (self *DebuggerWindow) SetData(data string) {
 	self.win.Set("dataText", data)
 }
+
 func (self *DebuggerWindow) SetAsm(data []byte) {
 	self.win.Root().Call("clearAsm")
 
@@ -127,22 +133,29 @@ func (self *DebuggerWindow) Debug(valueStr, gasStr, gasPriceStr, scriptStr, data
 
 	state := self.lib.eth.StateManager().TransState()
 	account := self.lib.eth.StateManager().TransState().GetAccount(keyPair.Address())
-	contract := ethchain.NewStateObject([]byte{0})
+	contract := ethstate.NewStateObject([]byte{0})
 	contract.Amount = value
 
-	callerClosure := ethchain.NewClosure(account, contract, script, state, gas, gasPrice)
+	self.SetAsm(script)
+
+	callerClosure := ethvm.NewClosure(account, contract, script, gas, gasPrice)
 
 	block := self.lib.eth.BlockChain().CurrentBlock
-	vm := ethchain.NewVm(state, self.lib.eth.StateManager(), ethchain.RuntimeVars{
-		Block:       block,
-		Origin:      account.Address(),
-		BlockNumber: block.Number,
-		PrevHash:    block.PrevHash,
-		Coinbase:    block.Coinbase,
-		Time:        block.Time,
-		Diff:        block.Difficulty,
-		Value:       ethutil.Big(valueStr),
-	})
+
+	/*
+		vm := ethchain.NewVm(state, self.lib.eth.StateManager(), ethchain.RuntimeVars{
+			Block:       block,
+			Origin:      account.Address(),
+			BlockNumber: block.Number,
+			PrevHash:    block.PrevHash,
+			Coinbase:    block.Coinbase,
+			Time:        block.Time,
+			Diff:        block.Difficulty,
+			Value:       ethutil.Big(valueStr),
+		})
+	*/
+	env := utils.NewEnv(state, block, account.Address(), value)
+	vm := ethvm.New(env)
 	vm.Verbose = true
 	vm.Dbg = self.Db
 
@@ -252,13 +265,13 @@ type storeVal struct {
 	Key, Value string
 }
 
-func (self *Debugger) BreakHook(pc int, op ethchain.OpCode, mem *ethchain.Memory, stack *ethchain.Stack, stateObject *ethchain.StateObject) bool {
+func (self *Debugger) BreakHook(pc int, op ethvm.OpCode, mem *ethvm.Memory, stack *ethvm.Stack, stateObject *ethstate.StateObject) bool {
 	self.main.Logln("break on instr:", pc)
 
 	return self.halting(pc, op, mem, stack, stateObject)
 }
 
-func (self *Debugger) StepHook(pc int, op ethchain.OpCode, mem *ethchain.Memory, stack *ethchain.Stack, stateObject *ethchain.StateObject) bool {
+func (self *Debugger) StepHook(pc int, op ethvm.OpCode, mem *ethvm.Memory, stack *ethvm.Stack, stateObject *ethstate.StateObject) bool {
 	return self.halting(pc, op, mem, stack, stateObject)
 }
 
@@ -270,7 +283,7 @@ func (self *Debugger) BreakPoints() []int64 {
 	return self.breakPoints
 }
 
-func (d *Debugger) halting(pc int, op ethchain.OpCode, mem *ethchain.Memory, stack *ethchain.Stack, stateObject *ethchain.StateObject) bool {
+func (d *Debugger) halting(pc int, op ethvm.OpCode, mem *ethvm.Memory, stack *ethvm.Stack, stateObject *ethstate.StateObject) bool {
 	d.win.Root().Call("setInstruction", pc)
 	d.win.Root().Call("clearMem")
 	d.win.Root().Call("clearStack")
@@ -286,7 +299,7 @@ func (d *Debugger) halting(pc int, op ethchain.OpCode, mem *ethchain.Memory, sta
 		d.win.Root().Call("setStack", val.String())
 	}
 
-	stateObject.State().EachStorage(func(key string, node *ethutil.Value) {
+	stateObject.EachStorage(func(key string, node *ethutil.Value) {
 		d.win.Root().Call("setStorage", storeVal{fmt.Sprintf("% x", key), fmt.Sprintf("% x", node.Str())})
 	})
 

ethereal/ext_app.go

@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"github.com/ethereum/eth-go/ethchain"
 	"github.com/ethereum/eth-go/ethpub"
+	"github.com/ethereum/eth-go/ethstate"
 	"github.com/ethereum/eth-go/ethutil"
 	"github.com/go-qml/qml"
 )
@@ -16,8 +17,8 @@ type AppContainer interface {
 	Engine() *qml.Engine
 
 	NewBlock(*ethchain.Block)
-	ObjectChanged(*ethchain.StateObject)
-	StorageChanged(*ethchain.StorageState)
+	ObjectChanged(*ethstate.StateObject)
+	StorageChanged(*ethstate.StorageState)
 	NewWatcher(chan bool)
 }
 
@@ -108,9 +109,9 @@ out:
 				app.container.NewBlock(block)
 			}
 		case object := <-app.changeChan:
-			if stateObject, ok := object.Resource.(*ethchain.StateObject); ok {
+			if stateObject, ok := object.Resource.(*ethstate.StateObject); ok {
 				app.container.ObjectChanged(stateObject)
-			} else if storageObject, ok := object.Resource.(*ethchain.StorageState); ok {
+			} else if storageObject, ok := object.Resource.(*ethstate.StorageState); ok {
 				app.container.StorageChanged(storageObject)
 			}
 		}

ethereal/gui.go

@@ -7,12 +7,14 @@ import (
 	"github.com/ethereum/eth-go/ethchain"
 	"github.com/ethereum/eth-go/ethdb"
 	"github.com/ethereum/eth-go/ethlog"
+	"github.com/ethereum/eth-go/ethminer"
 	"github.com/ethereum/eth-go/ethpub"
 	"github.com/ethereum/eth-go/ethutil"
 	"github.com/ethereum/eth-go/ethwire"
 	"github.com/ethereum/go-ethereum/utils"
 	"github.com/go-qml/qml"
 	"math/big"
+	"strconv"
 	"strings"
 	"time"
 )
@@ -40,6 +42,8 @@ type Gui struct {
 	Session        string
 	clientIdentity *ethwire.SimpleClientIdentity
 	config         *ethutil.ConfigManager
+
+	miner *ethminer.Miner
 }
 
 // Create GUI, but doesn't start it
@@ -124,6 +128,7 @@ func (gui *Gui) ToggleMining() {
 		txt = "Start mining"
 	} else {
 		utils.StartMining(gui.eth)
+		gui.miner = utils.GetMiner()
 		txt = "Stop mining"
 	}
 
@@ -138,10 +143,12 @@ func (gui *Gui) showWallet(context *qml.Context) (*qml.Window, error) {
 
 	win := gui.createWindow(component)
 
-	gui.setInitialBlockChain()
-	gui.loadAddressBook()
-	gui.readPreviousTransactions()
-	gui.setPeerInfo()
+	go func() {
+		gui.setInitialBlockChain()
+		gui.loadAddressBook()
+		gui.readPreviousTransactions()
+		gui.setPeerInfo()
+	}()
 
 	go gui.update()
 
@@ -215,8 +222,9 @@ func (gui *Gui) loadAddressBook() {
 
 	nameReg := ethpub.EthereumConfig(gui.eth.StateManager()).NameReg()
 	if nameReg != nil {
-		nameReg.State().EachStorage(func(name string, value *ethutil.Value) {
+		nameReg.EachStorage(func(name string, value *ethutil.Value) {
 			if name[0] != 0 {
+				value.Decode()
 				gui.win.Root().Call("addAddress", struct{ Name, Address string }{name, ethutil.Bytes2Hex(value.Bytes())})
 			}
 		})
@@ -243,7 +251,11 @@ func (gui *Gui) readPreviousTransactions() {
 }
 
 func (gui *Gui) processBlock(block *ethchain.Block, initial bool) {
-	gui.win.Root().Call("addBlock", ethpub.NewPBlock(block), initial)
+	name := ethpub.FindNameInNameReg(gui.eth.StateManager(), block.Coinbase)
+	b := ethpub.NewPBlock(block)
+	b.Name = name
+
+	gui.win.Root().Call("addBlock", b, initial)
 }
 
 func (gui *Gui) setWalletValue(amount, unconfirmedFunds *big.Int) {
@@ -262,18 +274,29 @@ func (gui *Gui) setWalletValue(amount, unconfirmedFunds *big.Int) {
 	gui.win.Root().Call("setWalletValue", str)
 }
 
+func (self *Gui) getObjectByName(objectName string) qml.Object {
+	return self.win.Root().ObjectByName(objectName)
+}
+
 // Simple go routine function that updates the list of peers in the GUI
 func (gui *Gui) update() {
 	reactor := gui.eth.Reactor()
 
-	blockChan := make(chan ethutil.React, 1)
-	txChan := make(chan ethutil.React, 1)
-	objectChan := make(chan ethutil.React, 1)
-	peerChan := make(chan ethutil.React, 1)
+	var (
+		blockChan     = make(chan ethutil.React, 1)
+		txChan        = make(chan ethutil.React, 1)
+		objectChan    = make(chan ethutil.React, 1)
+		peerChan      = make(chan ethutil.React, 1)
+		chainSyncChan = make(chan ethutil.React, 1)
+		miningChan    = make(chan ethutil.React, 1)
+	)
 
 	reactor.Subscribe("newBlock", blockChan)
 	reactor.Subscribe("newTx:pre", txChan)
 	reactor.Subscribe("newTx:post", txChan)
+	reactor.Subscribe("chainSync", chainSyncChan)
+	reactor.Subscribe("miner:start", miningChan)
+	reactor.Subscribe("miner:stop", miningChan)
 
 	nameReg := ethpub.EthereumConfig(gui.eth.StateManager()).NameReg()
 	if nameReg != nil {
@@ -281,12 +304,16 @@ func (gui *Gui) update() {
 	}
 	reactor.Subscribe("peerList", peerChan)
 
-	ticker := time.NewTicker(5 * time.Second)
+	peerUpdateTicker := time.NewTicker(5 * time.Second)
+	generalUpdateTicker := time.NewTicker(1 * time.Second)
 
 	state := gui.eth.StateManager().TransState()
 
 	unconfirmedFunds := new(big.Int)
 	gui.win.Root().Call("setWalletValue", fmt.Sprintf("%v", ethutil.CurrencyToString(state.GetAccount(gui.address()).Amount)))
+	gui.getObjectByName("syncProgressIndicator").Set("visible", !gui.eth.IsUpToDate())
+
+	lastBlockLabel := gui.getObjectByName("lastBlockLabel")
 
 	for {
 		select {
@@ -328,12 +355,32 @@ func (gui *Gui) update() {
 
 				state.UpdateStateObject(object)
 			}
+		case msg := <-chainSyncChan:
+			sync := msg.Resource.(bool)
+			gui.win.Root().ObjectByName("syncProgressIndicator").Set("visible", sync)
+
 		case <-objectChan:
 			gui.loadAddressBook()
 		case <-peerChan:
 			gui.setPeerInfo()
-		case <-ticker.C:
+		case <-peerUpdateTicker.C:
 			gui.setPeerInfo()
+		case msg := <-miningChan:
+			if msg.Event == "miner:start" {
+				gui.miner = msg.Resource.(*ethminer.Miner)
+			} else {
+				gui.miner = nil
+			}
+
+		case <-generalUpdateTicker.C:
+			statusText := "#" + gui.eth.BlockChain().CurrentBlock.Number.String()
+			if gui.miner != nil {
+				pow := gui.miner.GetPow()
+				if pow.GetHashrate() != 0 {
+					statusText = "Mining @ " + strconv.FormatInt(pow.GetHashrate(), 10) + "Khash - " + statusText
+				}
+			}
+			lastBlockLabel.Set("text", statusText)
 		}
 	}
 }
@@ -356,7 +403,7 @@ func (gui *Gui) address() []byte {
 }
 
 func (gui *Gui) RegisterName(name string) {
-	name = fmt.Sprintf("\"%s\"", name)
+	name = fmt.Sprintf("\"register\"\n\"%s\"", name)
 
 	gui.pub.Transact(gui.privateKey(), "NameReg", "", "10000", "10000000000000", name)
 }

ethereal/html_container.go

@@ -4,6 +4,7 @@ import (
 	"errors"
 	"github.com/ethereum/eth-go/ethchain"
 	"github.com/ethereum/eth-go/ethpub"
+	"github.com/ethereum/eth-go/ethstate"
 	"github.com/ethereum/eth-go/ethutil"
 	"github.com/go-qml/qml"
 	"github.com/howeyc/fsnotify"
@@ -121,11 +122,11 @@ func (app *HtmlApplication) NewBlock(block *ethchain.Block) {
 	app.webView.Call("onNewBlockCb", b)
 }
 
-func (app *HtmlApplication) ObjectChanged(stateObject *ethchain.StateObject) {
+func (app *HtmlApplication) ObjectChanged(stateObject *ethstate.StateObject) {
 	app.webView.Call("onObjectChangeCb", ethpub.NewPStateObject(stateObject))
 }
 
-func (app *HtmlApplication) StorageChanged(storageObject *ethchain.StorageState) {
+func (app *HtmlApplication) StorageChanged(storageObject *ethstate.StorageState) {
 	app.webView.Call("onStorageChangeCb", ethpub.NewPStorageState(storageObject))
 }
 

ethereal/main.go

@@ -10,15 +10,14 @@ import (
 
 const (
 	ClientIdentifier = "Ethereal"
-	Version          = "0.5.16"
+	Version          = "0.6.0"
 )
 
 func main() {
-	// Leave QT on top at ALL times. Qt Needs to be initialized from the main thread
-	qml.Init(nil)
-
 	runtime.GOMAXPROCS(runtime.NumCPU())
 
+	qml.Init(nil)
+
 	var interrupted = false
 	utils.RegisterInterrupt(func(os.Signal) {
 		interrupted = true

ethereal/qml_container.go

@@ -3,6 +3,7 @@ package main
 import (
 	"github.com/ethereum/eth-go/ethchain"
 	"github.com/ethereum/eth-go/ethpub"
+	"github.com/ethereum/eth-go/ethstate"
 	"github.com/ethereum/eth-go/ethutil"
 	"github.com/go-qml/qml"
 	"runtime"
@@ -50,11 +51,11 @@ func (app *QmlApplication) NewBlock(block *ethchain.Block) {
 	app.win.Call("onNewBlockCb", pblock)
 }
 
-func (app *QmlApplication) ObjectChanged(stateObject *ethchain.StateObject) {
+func (app *QmlApplication) ObjectChanged(stateObject *ethstate.StateObject) {
 	app.win.Call("onObjectChangeCb", ethpub.NewPStateObject(stateObject))
 }
 
-func (app *QmlApplication) StorageChanged(storageObject *ethchain.StorageState) {
+func (app *QmlApplication) StorageChanged(storageObject *ethstate.StorageState) {
 	app.win.Call("onStorageChangeCb", ethpub.NewPStorageState(storageObject))
 }
 

ethereal/ui_lib.go

@@ -78,8 +78,8 @@ func (ui *UiLib) AssetPath(p string) string {
 func (self *UiLib) StartDbWithContractAndData(contractHash, data string) {
 	dbWindow := NewDebuggerWindow(self)
 	object := self.eth.StateManager().CurrentState().GetStateObject(ethutil.Hex2Bytes(contractHash))
-	if len(object.Script()) > 0 {
-		dbWindow.SetCode("0x" + ethutil.Bytes2Hex(object.Script()))
+	if len(object.Code) > 0 {
+		dbWindow.SetCode("0x" + ethutil.Bytes2Hex(object.Code))
 	}
 	dbWindow.SetData("0x" + data)
 

ethereum/main.go

@@ -9,7 +9,7 @@ import (
 
 const (
 	ClientIdentifier = "Ethereum(G)"
-	Version          = "0.5.16"
+	Version          = "0.6.0"
 )
 
 var logger = ethlog.NewLogger("CLI")

ethereum/repl/javascript_runtime.go

@@ -6,6 +6,7 @@ import (
 	"github.com/ethereum/eth-go/ethchain"
 	"github.com/ethereum/eth-go/ethlog"
 	"github.com/ethereum/eth-go/ethpub"
+	"github.com/ethereum/eth-go/ethstate"
 	"github.com/ethereum/eth-go/ethutil"
 	"github.com/ethereum/go-ethereum/utils"
 	"github.com/obscuren/otto"
@@ -121,12 +122,12 @@ out:
 			if _, ok := block.Resource.(*ethchain.Block); ok {
 			}
 		case object := <-self.changeChan:
-			if stateObject, ok := object.Resource.(*ethchain.StateObject); ok {
+			if stateObject, ok := object.Resource.(*ethstate.StateObject); ok {
 				for _, cb := range self.objectCb[ethutil.Bytes2Hex(stateObject.Address())] {
 					val, _ := self.vm.ToValue(ethpub.NewPStateObject(stateObject))
 					cb.Call(cb, val)
 				}
-			} else if storageObject, ok := object.Resource.(*ethchain.StorageState); ok {
+			} else if storageObject, ok := object.Resource.(*ethstate.StorageState); ok {
 				for _, cb := range self.objectCb[ethutil.Bytes2Hex(storageObject.StateAddress)+ethutil.Bytes2Hex(storageObject.Address)] {
 					val, _ := self.vm.ToValue(ethpub.NewPStorageState(storageObject))
 					cb.Call(cb, val)

utils/cmd.go

@@ -234,7 +234,11 @@ func StartRpc(ethereum *eth.Ethereum, RpcPort int) {
 	}
 }
 
-var miner ethminer.Miner
+var miner *ethminer.Miner
+
+func GetMiner() *ethminer.Miner {
+	return miner
+}
 
 func StartMining(ethereum *eth.Ethereum) bool {
 	if !ethereum.Mining {
@@ -243,7 +247,10 @@ func StartMining(ethereum *eth.Ethereum) bool {
 		addr := ethereum.KeyManager().Address()
 
 		go func() {
-			miner = ethminer.NewDefaultMiner(addr, ethereum)
+			if miner == nil {
+				miner = ethminer.NewDefaultMiner(addr, ethereum)
+			}
+
 			// Give it some time to connect with peers
 			time.Sleep(3 * time.Second)
 			for !ethereum.IsUpToDate() {
@@ -251,7 +258,6 @@ func StartMining(ethereum *eth.Ethereum) bool {
 			}
 
 			logger.Infoln("Miner started")
-			miner := ethminer.NewDefaultMiner(addr, ethereum)
 			miner.Start()
 		}()
 		RegisterInterrupt(func(os.Signal) {
@@ -263,12 +269,16 @@ func StartMining(ethereum *eth.Ethereum) bool {
 }
 
 func StopMining(ethereum *eth.Ethereum) bool {
-	if ethereum.Mining {
+	if ethereum.Mining && miner != nil {
 		miner.Stop()
+
 		logger.Infoln("Miner stopped")
+
 		ethereum.Mining = false
+
 		return true
 	}
+
 	return false
 }
 

utils/vm_env.go

@@ -0,0 +1,33 @@
+package utils
+
+import (
+	"github.com/ethereum/eth-go/ethchain"
+	"github.com/ethereum/eth-go/ethstate"
+	"math/big"
+)
+
+type VMEnv struct {
+	state *ethstate.State
+	block *ethchain.Block
+
+	transactor []byte
+	value      *big.Int
+}
+
+func NewEnv(state *ethstate.State, block *ethchain.Block, transactor []byte, value *big.Int) *VMEnv {
+	return &VMEnv{
+		state:      state,
+		block:      block,
+		transactor: transactor,
+		value:      value,
+	}
+}
+
+func (self *VMEnv) Origin() []byte         { return self.transactor }
+func (self *VMEnv) BlockNumber() *big.Int  { return self.block.Number }
+func (self *VMEnv) PrevHash() []byte       { return self.block.PrevHash }
+func (self *VMEnv) Coinbase() []byte       { return self.block.Coinbase }
+func (self *VMEnv) Time() int64            { return self.block.Time }
+func (self *VMEnv) Difficulty() *big.Int   { return self.block.Difficulty }
+func (self *VMEnv) Value() *big.Int        { return self.value }
+func (self *VMEnv) State() *ethstate.State { return self.state }