Merge master into miner branch

ethereal/Makefile

@@ -0,0 +1,22 @@
+UNAME = $(shell uname)
+FILES=qml *.png
+GOPATH=$(PWD)
+
+
+# Default is building
+all:
+	go get -d
+	cp *.go $(GOPATH)/src/github.com/ethereum/go-ethereum
+	cp -r ui $(GOPATH)/src/github.com/ethereum/go-ethereum
+	go build
+
+install:
+# Linux build
+ifeq ($(UNAME),Linux)
+	cp -r assets/* /usr/share/ethereal
+	cp go-ethereum /usr/local/bin/ethereal
+endif
+# OS X build
+ifeq ($(UNAME),Darwin)
+	# Execute py script
+endif

ethereal/assets/qml/test_app.qml

@@ -0,0 +1,35 @@
+import QtQuick 2.0
+import QtQuick.Controls 1.0;
+import QtQuick.Layouts 1.0;
+import Ethereum 1.0
+
+ApplicationWindow {
+	minimumWidth: 500
+	maximumWidth: 500
+	maximumHeight: 100
+	minimumHeight: 100
+
+	title: "Ethereum Dice"
+
+	TextField {
+		id: textField
+		anchors.verticalCenter: parent.verticalCenter
+		anchors.horizontalCenter: parent.horizontalCenter
+		placeholderText: "Amount"
+	}
+	Label {
+		id: txHash
+		anchors.bottom: textField.top
+		anchors.bottomMargin: 5
+		anchors.horizontalCenter: parent.horizontalCenter
+	}
+	Button {
+		anchors.top: textField.bottom
+		anchors.horizontalCenter: parent.horizontalCenter
+		anchors.topMargin: 5
+		text: "Place bet"
+		onClicked: {
+			txHash.text = eth.createTx("e6716f9544a56c530d868e4bfbacb172315bdead", textField.text)
+		}
+	}
+}

ethereal/assets/qml/transactions.qml

@@ -0,0 +1,9 @@
+import QtQuick 2.0
+import QtQuick.Controls 1.0;
+import QtQuick.Layouts 1.0;
+
+Rectangle {
+	id: transactionView
+	visible: false
+	Text { text: "TX VIEW" }
+}

ethereal/assets/qml/wallet.qml

@@ -0,0 +1,408 @@
+import QtQuick 2.0
+import QtQuick.Controls 1.0;
+import QtQuick.Layouts 1.0;
+import QtQuick.Dialogs 1.0;
+import QtQuick.Window 2.1;
+import QtQuick.Controls.Styles 1.1
+import Ethereum 1.0
+
+ApplicationWindow {
+	id: root
+
+	width: 900
+	height: 600
+	minimumHeight: 300
+
+	title: "Ethereal"
+
+	MenuBar {
+		Menu {
+			title: "File"
+			MenuItem {
+				text: "Import App"
+				shortcut: "Ctrl+o"
+				onTriggered: openAppDialog.open()
+			}
+		}
+
+		Menu {
+			title: "Network"
+			MenuItem {
+				text: "Add Peer"
+				shortcut: "Ctrl+p"
+				onTriggered: {
+					addPeerWin.visible = true
+				}
+			}
+
+			MenuItem {
+				text: "Start"
+				onTriggered: ui.connect()
+			}
+		}
+
+		Menu {
+			title: "Help"
+			MenuItem {
+				text: "About"
+				onTriggered: {
+					aboutWin.visible = true
+				}
+			}
+		}
+
+	}
+
+
+	property var blockModel: ListModel {
+		id: blockModel
+	}
+
+	function setView(view) {
+		networkView.visible = false
+		historyView.visible = false
+		newTxView.visible = false
+		view.visible = true
+		//root.title = "Ethereal - " = view.title
+	}
+
+	SplitView {
+		anchors.fill: parent
+		resizing: false
+
+		Rectangle {
+			id: menu
+			Layout.minimumWidth: 80
+			Layout.maximumWidth: 80
+			anchors.bottom: parent.bottom
+			anchors.top: parent.top
+			//color: "#D9DDE7"
+			color: "#252525"
+
+			ColumnLayout {
+				y: 50
+				anchors.left: parent.left
+				anchors.right: parent.right
+				height: 200
+				Image {
+					source: ui.assetPath("tx.png")
+					anchors.horizontalCenter: parent.horizontalCenter
+					MouseArea {
+						anchors.fill: parent
+						onClicked: {
+							setView(historyView)
+						}
+					}
+				}
+				Image {
+					source: ui.assetPath("new.png")
+					anchors.horizontalCenter: parent.horizontalCenter
+					MouseArea {
+						anchors.fill: parent
+						onClicked: {
+							setView(newTxView)
+						}
+					}
+				}
+				Image {
+					source: ui.assetPath("net.png")
+					anchors.horizontalCenter: parent.horizontalCenter
+					MouseArea {
+						anchors.fill: parent
+						onClicked: {
+							setView(networkView)
+						}
+					}
+				}
+			}
+		}
+
+		Rectangle {
+			id: mainView
+			color: "#00000000"
+			anchors.right: parent.right
+			anchors.left: menu.right
+			anchors.bottom: parent.bottom
+			anchors.top: parent.top
+
+			property var txModel: ListModel {
+				id: txModel
+			}
+
+			Rectangle {
+				id: historyView
+				anchors.fill: parent
+
+				property var title: "Transactions"
+				TableView {
+					id: txTableView
+					anchors.fill: parent
+					TableViewColumn{ role: "value" ; title: "Value" ; width: 100 }
+					TableViewColumn{ role: "address" ; title: "Address" ; width: 430 }
+
+					model: txModel
+				}
+			}
+
+			Rectangle {
+				id: newTxView
+				property var title: "New transaction"
+				visible: false
+				anchors.fill: parent
+				color: "#00000000"
+
+				ColumnLayout {
+					width: 400
+					anchors.left: parent.left
+					anchors.top: parent.top
+					anchors.leftMargin: 5
+					anchors.topMargin: 5
+					TextField {
+						id: txAmount
+						width: 200
+						placeholderText: "Amount"
+					}
+
+					TextField {
+						id: txReceiver
+						placeholderText: "Receiver Address (or empty for contract)"
+						Layout.fillWidth: true
+					}
+
+					Label {
+						text: "Transaction data"
+					}
+					TextArea {
+						id: codeView
+						anchors.topMargin: 5
+						Layout.fillWidth: true
+						width: parent.width /2 
+					}
+
+					Button {
+						text: "Send"
+						onClicked: {
+							console.log(eth.createTx(txReceiver.text, txAmount.text, codeView.text))
+						}
+					}
+				}
+			}
+
+
+			Rectangle {
+				id: networkView
+				property var title: "Network"
+				visible: false
+				anchors.fill: parent
+
+				TableView {
+					id: blockTable
+					width: parent.width
+					anchors.top: parent.top
+					anchors.bottom: logView.top
+					TableViewColumn{ role: "number" ; title: "#" ; width: 100 }
+					TableViewColumn{ role: "hash" ; title: "Hash" ; width: 560 }
+
+					model: blockModel
+
+					/*
+					 onDoubleClicked: {
+						 popup.visible = true
+						 popup.block = eth.getBlock(blockModel.get(row).hash)
+						 popup.hashLabel.text = popup.block.hash
+					 }
+					 */
+				}
+
+				property var logModel: ListModel {
+					id: logModel
+				}
+
+				TableView {
+					id: logView
+					width: parent.width
+					height: 150
+					anchors.bottom: parent.bottom
+					TableViewColumn{ role: "description" ; title: "log" }
+
+					model: logModel
+				}
+			}
+
+			/*
+			signal addPlugin(string name)
+			Component {
+				id: pluginWindow
+				Rectangle {
+					anchors.fill: parent
+					Label {
+						id: pluginTitle
+						anchors.centerIn: parent
+						text: "Hello world"
+					}
+					Component.onCompleted: setView(this)
+				}
+			}
+
+			onAddPlugin: {
+				var pluginWin = pluginWindow.createObject(mainView)
+				console.log(pluginWin)
+				pluginWin.pluginTitle.text = "Test"
+			}
+			*/
+		}
+	}
+
+	FileDialog {
+		id: openAppDialog
+		title: "Open QML Application"
+		onAccepted: {
+			ui.open(openAppDialog.fileUrl.toString())
+		}
+	}
+
+	statusBar: StatusBar {
+		RowLayout {
+			anchors.fill: parent
+			Button {
+				property var enabled: true
+				id: connectButton
+				onClicked: {
+					if(this.enabled) {
+						ui.connect(this)
+					}
+				}
+				text: "Connect"
+			}
+
+			Button {
+				id: importAppButton
+				anchors.left: connectButton.right
+				anchors.leftMargin: 5
+				onClicked: openAppDialog.open()
+				text: "Import App"
+			}
+
+			Label {
+				anchors.left: importAppButton.right
+				anchors.leftMargin: 5
+				id: walletValueLabel
+			}
+
+			Label {
+				anchors.right: peerImage.left
+				anchors.rightMargin: 5
+				id: peerLabel
+				font.pixelSize: 8
+				text: "0 / 0"
+			}
+			Image {
+				id: peerImage
+				anchors.right: parent.right
+				width: 10; height: 10
+				source: ui.assetPath("network.png")
+			}
+		}
+	}
+
+	Window {
+		id: popup
+		visible: false
+		property var block
+		Label {
+			id: hashLabel
+			anchors.horizontalCenter: parent.horizontalCenter
+			anchors.verticalCenter: parent.verticalCenter
+		}
+	}
+
+	Window {
+		id: addPeerWin
+		visible: false
+		minimumWidth: 230
+		maximumWidth: 230
+		maximumHeight: 50
+		minimumHeight: 50
+
+		TextField {
+			id: addrField
+			anchors.verticalCenter: parent.verticalCenter
+			anchors.left: parent.left
+			anchors.leftMargin: 10
+			placeholderText: "address:port"
+			onAccepted: {
+				ui.connectToPeer(addrField.text)
+				addPeerWin.visible = false
+			}
+		}
+		Button {
+			anchors.left: addrField.right
+			anchors.verticalCenter: parent.verticalCenter
+			anchors.leftMargin: 5
+			text: "Add"
+			onClicked: {
+				ui.connectToPeer(addrField.text)
+				addPeerWin.visible = false
+			}
+		}
+		Component.onCompleted: {
+			addrField.focus = true
+		}
+	}
+
+	Window {
+		id: aboutWin
+		visible: false
+		title: "About"
+		minimumWidth: 350
+		maximumWidth: 350
+		maximumHeight: 200
+		minimumHeight: 200
+
+		Image {
+			id: aboutIcon
+			height: 150
+			width: 150
+			fillMode: Image.PreserveAspectFit
+			smooth: true
+			source: ui.assetPath("facet.png")
+			x: 10
+			y: 10
+		}
+
+		Text {
+			anchors.left: aboutIcon.right
+			anchors.leftMargin: 10
+			font.pointSize: 12
+			text: "<h2>Ethereum(Go)</h2><br><h3>Development</h3>Jeffrey Wilcke<br><h3>Binary Distribution</h3>Jarrad Hope<br>"
+		}
+
+	}
+
+	function loadPlugin(name) {
+		console.log("Loading plugin" + name)
+		mainView.addPlugin(name)
+	}
+
+	function setWalletValue(value) {
+		walletValueLabel.text = value
+	}
+
+	function addTx(tx) {
+		txModel.insert(0, {hash: tx.hash, address: tx.address, value: tx.value})
+	}
+
+	function addBlock(block) {
+		blockModel.insert(0, {number: block.number, hash: block.hash})
+	}
+
+	function addLog(str) {
+		if(str.len != 0) {
+			logModel.append({description: str})
+		}
+	}
+
+	function setPeers(text) {
+		peerLabel.text = text
+	}
+}

ethereal/config.go

@@ -0,0 +1,34 @@
+package main
+
+import (
+	"flag"
+)
+
+var StartConsole bool
+var StartMining bool
+var UseUPnP bool
+var OutboundPort string
+var ShowGenesis bool
+var AddPeer string
+var MaxPeer int
+var GenAddr bool
+var UseSeed bool
+var ImportKey string
+var ExportKey bool
+var DataDir string
+
+func Init() {
+	flag.BoolVar(&StartConsole, "c", false, "debug and testing console")
+	flag.BoolVar(&StartMining, "m", false, "start dagger mining")
+	flag.BoolVar(&ShowGenesis, "g", false, "prints genesis header and exits")
+	flag.BoolVar(&UseUPnP, "upnp", false, "enable UPnP support")
+	flag.BoolVar(&UseSeed, "seed", true, "seed peers")
+	flag.BoolVar(&GenAddr, "genaddr", false, "create a new priv/pub key")
+	flag.BoolVar(&ExportKey, "export", false, "export private key")
+	flag.StringVar(&OutboundPort, "p", "30303", "listening port")
+	flag.StringVar(&DataDir, "dir", ".ethereal", "ethereum data directory")
+	flag.StringVar(&ImportKey, "import", "", "imports the given private key (hex)")
+	flag.IntVar(&MaxPeer, "x", 5, "maximum desired peers")
+
+	flag.Parse()
+}

ethereal/ethereum.go

@@ -0,0 +1,110 @@
+package main
+
+import (
+	"fmt"
+	"github.com/ethereum/eth-go"
+	"github.com/ethereum/eth-go/ethchain"
+	"github.com/ethereum/eth-go/ethutil"
+	"github.com/ethereum/go-ethereum/ethereal/ui"
+	"github.com/ethereum/go-ethereum/utils"
+	"github.com/niemeyer/qml"
+	"log"
+	"os"
+	"os/signal"
+	"runtime"
+)
+
+const Debug = true
+
+// Register interrupt handlers so we can stop the ethereum
+func RegisterInterupts(s *eth.Ethereum) {
+	// Buffered chan of one is enough
+	c := make(chan os.Signal, 1)
+	// Notify about interrupts for now
+	signal.Notify(c, os.Interrupt)
+	go func() {
+		for sig := range c {
+			fmt.Printf("Shutting down (%v) ... \n", sig)
+
+			s.Stop()
+		}
+	}()
+}
+
+func main() {
+	Init()
+
+	qml.Init(nil)
+
+	runtime.GOMAXPROCS(runtime.NumCPU())
+
+	ethchain.InitFees()
+	ethutil.ReadConfig(DataDir)
+	ethutil.Config.Seed = UseSeed
+
+	// Instantiated a eth stack
+	ethereum, err := eth.New(eth.CapDefault, UseUPnP)
+	if err != nil {
+		log.Println("eth start err:", err)
+		return
+	}
+	ethereum.Port = OutboundPort
+
+	if GenAddr {
+		fmt.Println("This action overwrites your old private key. Are you sure? (y/n)")
+
+		var r string
+		fmt.Scanln(&r)
+		for ; ; fmt.Scanln(&r) {
+			if r == "n" || r == "y" {
+				break
+			} else {
+				fmt.Printf("Yes or no?", r)
+			}
+		}
+
+		if r == "y" {
+			utils.CreateKeyPair(true)
+		}
+		os.Exit(0)
+	} else {
+		if len(ImportKey) > 0 {
+			fmt.Println("This action overwrites your old private key. Are you sure? (y/n)")
+			var r string
+			fmt.Scanln(&r)
+			for ; ; fmt.Scanln(&r) {
+				if r == "n" || r == "y" {
+					break
+				} else {
+					fmt.Printf("Yes or no?", r)
+				}
+			}
+
+			if r == "y" {
+				utils.ImportPrivateKey(ImportKey)
+				os.Exit(0)
+			}
+		} else {
+			utils.CreateKeyPair(false)
+		}
+	}
+
+	if ExportKey {
+		key := ethutil.Config.Db.GetKeys()[0]
+		fmt.Printf("%x\n", key.PrivateKey)
+		os.Exit(0)
+	}
+
+	if ShowGenesis {
+		fmt.Println(ethereum.BlockChain().Genesis())
+		os.Exit(0)
+	}
+
+	log.Printf("Starting Ethereum v%s\n", ethutil.Config.Ver)
+
+	// Set the max peers
+	ethereum.MaxPeers = MaxPeer
+
+	gui := ethui.New(ethereum)
+	gui.Start()
+}

ethereal/ui/gui.go

@@ -0,0 +1,218 @@
+package ethui
+
+import (
+	"bytes"
+	"encoding/hex"
+	"fmt"
+	"github.com/ethereum/eth-go"
+	"github.com/ethereum/eth-go/ethchain"
+	"github.com/ethereum/eth-go/ethdb"
+	"github.com/ethereum/eth-go/ethutil"
+	"github.com/niemeyer/qml"
+	"math/big"
+	"strings"
+)
+
+// Block interface exposed to QML
+type Block struct {
+	Number int
+	Hash   string
+}
+
+type Tx struct {
+	Value, Hash, Address string
+}
+
+func NewTxFromTransaction(tx *ethchain.Transaction) *Tx {
+	hash := hex.EncodeToString(tx.Hash())
+	sender := hex.EncodeToString(tx.Recipient)
+
+	return &Tx{Hash: hash, Value: ethutil.CurrencyToString(tx.Value), Address: sender}
+}
+
+// Creates a new QML Block from a chain block
+func NewBlockFromBlock(block *ethchain.Block) *Block {
+	info := block.BlockInfo()
+	hash := hex.EncodeToString(block.Hash())
+
+	return &Block{Number: int(info.Number), Hash: hash}
+}
+
+type Gui struct {
+	// The main application window
+	win *qml.Window
+	// QML Engine
+	engine    *qml.Engine
+	component *qml.Common
+	// The ethereum interface
+	eth *eth.Ethereum
+
+	// The public Ethereum library
+	lib *EthLib
+
+	txDb *ethdb.LDBDatabase
+
+	addr []byte
+}
+
+// Create GUI, but doesn't start it
+func New(ethereum *eth.Ethereum) *Gui {
+	lib := &EthLib{stateManager: ethereum.StateManager(), blockChain: ethereum.BlockChain(), txPool: ethereum.TxPool()}
+	db, err := ethdb.NewLDBDatabase("tx_database")
+	if err != nil {
+		panic(err)
+	}
+
+	key := ethutil.Config.Db.GetKeys()[0]
+	addr := key.Address()
+
+	ethereum.StateManager().WatchAddr(addr)
+
+	return &Gui{eth: ethereum, lib: lib, txDb: db, addr: addr}
+}
+
+func (ui *Gui) Start() {
+	defer ui.txDb.Close()
+
+	// Register ethereum functions
+	qml.RegisterTypes("Ethereum", 1, 0, []qml.TypeSpec{{
+		Init: func(p *Block, obj qml.Object) { p.Number = 0; p.Hash = "" },
+	}, {
+		Init: func(p *Tx, obj qml.Object) { p.Value = ""; p.Hash = ""; p.Address = "" },
+	}})
+
+	ethutil.Config.SetClientString(fmt.Sprintf("/Ethereal v%s", "0.1"))
+	ethutil.Config.Log.Infoln("[GUI] Starting GUI")
+	// Create a new QML engine
+	ui.engine = qml.NewEngine()
+	context := ui.engine.Context()
+
+	// Expose the eth library and the ui library to QML
+	context.SetVar("eth", ui.lib)
+	context.SetVar("ui", &UiLib{engine: ui.engine, eth: ui.eth})
+
+	// Load the main QML interface
+	component, err := ui.engine.LoadFile(AssetPath("qml/wallet.qml"))
+	if err != nil {
+		panic(err)
+	}
+	ui.engine.LoadFile(AssetPath("qml/transactions.qml"))
+
+	ui.win = component.CreateWindow(nil)
+
+	// Register the ui as a block processor
+	//ui.eth.BlockManager.SecondaryBlockProcessor = ui
+	//ui.eth.TxPool.SecondaryProcessor = ui
+
+	// Add the ui as a log system so we can log directly to the UGI
+	ethutil.Config.Log.AddLogSystem(ui)
+
+	// Loads previous blocks
+	go ui.setInitialBlockChain()
+	go ui.readPreviousTransactions()
+	go ui.update()
+
+	ui.win.Show()
+	ui.win.Wait()
+
+	ui.eth.Stop()
+}
+
+func (ui *Gui) setInitialBlockChain() {
+	// Load previous 10 blocks
+	chain := ui.eth.BlockChain().GetChain(ui.eth.BlockChain().CurrentBlock.Hash(), 10)
+	for _, block := range chain {
+		ui.ProcessBlock(block)
+	}
+
+}
+
+func (ui *Gui) readPreviousTransactions() {
+	it := ui.txDb.Db().NewIterator(nil, nil)
+	for it.Next() {
+		tx := ethchain.NewTransactionFromBytes(it.Value())
+
+		ui.win.Root().Call("addTx", NewTxFromTransaction(tx))
+	}
+	it.Release()
+}
+
+func (ui *Gui) ProcessBlock(block *ethchain.Block) {
+	ui.win.Root().Call("addBlock", NewBlockFromBlock(block))
+}
+
+// Simple go routine function that updates the list of peers in the GUI
+func (ui *Gui) update() {
+	txChan := make(chan ethchain.TxMsg, 1)
+	ui.eth.TxPool().Subscribe(txChan)
+
+	account := ui.eth.StateManager().GetAddrState(ui.addr).Account
+	unconfirmedFunds := new(big.Int)
+	ui.win.Root().Call("setWalletValue", fmt.Sprintf("%v", ethutil.CurrencyToString(account.Amount)))
+	for {
+		select {
+		case txMsg := <-txChan:
+			tx := txMsg.Tx
+
+			if txMsg.Type == ethchain.TxPre {
+				if bytes.Compare(tx.Sender(), ui.addr) == 0 {
+					ui.win.Root().Call("addTx", NewTxFromTransaction(tx))
+					ui.txDb.Put(tx.Hash(), tx.RlpEncode())
+
+					ui.eth.StateManager().GetAddrState(ui.addr).Nonce += 1
+					unconfirmedFunds.Sub(unconfirmedFunds, tx.Value)
+				} else if bytes.Compare(tx.Recipient, ui.addr) == 0 {
+					ui.win.Root().Call("addTx", NewTxFromTransaction(tx))
+					ui.txDb.Put(tx.Hash(), tx.RlpEncode())
+
+					unconfirmedFunds.Add(unconfirmedFunds, tx.Value)
+				}
+
+				pos := "+"
+				if unconfirmedFunds.Cmp(big.NewInt(0)) >= 0 {
+					pos = "-"
+				}
+				val := ethutil.CurrencyToString(new(big.Int).Abs(ethutil.BigCopy(unconfirmedFunds)))
+				str := fmt.Sprintf("%v (%s %v)", ethutil.CurrencyToString(account.Amount), pos, val)
+
+				ui.win.Root().Call("setWalletValue", str)
+			} else {
+				amount := account.Amount
+				if bytes.Compare(tx.Sender(), ui.addr) == 0 {
+					amount.Sub(account.Amount, tx.Value)
+				} else if bytes.Compare(tx.Recipient, ui.addr) == 0 {
+					amount.Add(account.Amount, tx.Value)
+				}
+
+				ui.win.Root().Call("setWalletValue", fmt.Sprintf("%v", ethutil.CurrencyToString(amount)))
+			}
+		}
+
+		/*
+			accountAmount := ui.eth.BlockManager.GetAddrState(ui.addr).Account.Amount
+			ui.win.Root().Call("setWalletValue", fmt.Sprintf("%v", accountAmount))
+
+			ui.win.Root().Call("setPeers", fmt.Sprintf("%d / %d", ui.eth.Peers().Len(), ui.eth.MaxPeers))
+
+			time.Sleep(1 * time.Second)
+		*/
+
+	}
+}
+
+// Logging functions that log directly to the GUI interface
+func (ui *Gui) Println(v ...interface{}) {
+	str := strings.TrimRight(fmt.Sprintln(v...), "\n")
+	lines := strings.Split(str, "\n")
+	for _, line := range lines {
+		ui.win.Root().Call("addLog", line)
+	}
+}
+
+func (ui *Gui) Printf(format string, v ...interface{}) {
+	str := strings.TrimRight(fmt.Sprintf(format, v...), "\n")
+	lines := strings.Split(str, "\n")
+	for _, line := range lines {
+		ui.win.Root().Call("addLog", line)
+	}
+}

ethereal/ui/library.go

@@ -0,0 +1,60 @@
+package ethui
+
+import (
+	"encoding/hex"
+	"fmt"
+	"github.com/ethereum/eth-go/ethchain"
+	"github.com/ethereum/eth-go/ethutil"
+	"strings"
+)
+
+type EthLib struct {
+	stateManager *ethchain.StateManager
+	blockChain   *ethchain.BlockChain
+	txPool       *ethchain.TxPool
+}
+
+func (lib *EthLib) CreateTx(receiver, a, data string) string {
+	var hash []byte
+	if len(receiver) == 0 {
+		hash = ethchain.ContractAddr
+	} else {
+		var err error
+		hash, err = hex.DecodeString(receiver)
+		if err != nil {
+			return err.Error()
+		}
+	}
+
+	k, _ := ethutil.Config.Db.Get([]byte("KeyRing"))
+	keyPair := ethutil.NewKeyFromBytes(k)
+
+	amount := ethutil.Big(a)
+	code := ethchain.Compile(strings.Split(data, "\n"))
+	tx := ethchain.NewTransaction(hash, amount, code)
+	tx.Nonce = lib.stateManager.GetAddrState(keyPair.Address()).Nonce
+
+	tx.Sign(keyPair.PrivateKey)
+
+	lib.txPool.QueueTransaction(tx)
+
+	if len(receiver) == 0 {
+		ethutil.Config.Log.Infof("Contract addr %x", tx.Hash()[12:])
+	} else {
+		ethutil.Config.Log.Infof("Tx hash %x", tx.Hash())
+	}
+
+	return ethutil.Hex(tx.Hash())
+}
+
+func (lib *EthLib) GetBlock(hexHash string) *Block {
+	hash, err := hex.DecodeString(hexHash)
+	if err != nil {
+		return nil
+	}
+
+	block := lib.blockChain.GetBlock(hash)
+	fmt.Println(block)
+
+	return &Block{Number: int(block.BlockInfo().Number), Hash: ethutil.Hex(block.Hash())}
+}

ethereal/ui/ui_lib.go

@@ -0,0 +1,75 @@
+package ethui
+
+import (
+	"bitbucket.org/kardianos/osext"
+	"github.com/ethereum/eth-go"
+	"github.com/ethereum/eth-go/ethutil"
+	"github.com/niemeyer/qml"
+	"os"
+	"path"
+	"path/filepath"
+	"runtime"
+)
+
+// UI Library that has some basic functionality exposed
+type UiLib struct {
+	engine    *qml.Engine
+	eth       *eth.Ethereum
+	connected bool
+}
+
+// Opens a QML file (external application)
+func (ui *UiLib) Open(path string) {
+	component, err := ui.engine.LoadFile(path[7:])
+	if err != nil {
+		ethutil.Config.Log.Debugln(err)
+	}
+	win := component.CreateWindow(nil)
+
+	go func() {
+		win.Show()
+		win.Wait()
+	}()
+}
+
+func (ui *UiLib) Connect(button qml.Object) {
+	if !ui.connected {
+		ui.eth.Start()
+		ui.connected = true
+		button.Set("enabled", false)
+	}
+}
+
+func (ui *UiLib) ConnectToPeer(addr string) {
+	ui.eth.ConnectToPeer(addr)
+}
+
+func (ui *UiLib) AssetPath(p string) string {
+	return AssetPath(p)
+}
+
+func AssetPath(p string) string {
+	var base string
+	// If the current working directory is the go-ethereum dir
+	// assume a debug build and use the source directory as
+	// asset directory.
+	pwd, _ := os.Getwd()
+	if pwd == path.Join(os.Getenv("GOPATH"), "src", "github.com", "ethereum", "go-ethereum", "ethereal") {
+		base = path.Join(pwd, "assets")
+	} else {
+		switch runtime.GOOS {
+		case "darwin":
+			// Get Binary Directory
+			exedir, _ := osext.ExecutableFolder()
+			base = filepath.Join(exedir, "../Resources")
+		case "linux":
+			base = "/usr/share/ethereal"
+		case "window":
+			fallthrough
+		default:
+			base = "."
+		}
+	}
+
+	return path.Join(base, p)
+}