package ethui import ( "bytes" "fmt" "github.com/ethereum/eth-go" "github.com/ethereum/eth-go/ethchain" "github.com/ethereum/eth-go/ethdb" "github.com/ethereum/eth-go/ethpub" "github.com/ethereum/eth-go/ethutil" "github.com/go-qml/qml" "github.com/obscuren/mutan" "math/big" "strings" ) 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 uiLib *UiLib txDb *ethdb.LDBDatabase addr []byte pub *ethpub.PEthereum } // 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) } // On first run we won't have any keys yet, so this would crash. // Therefor we check if we are ready to actually start this process var addr []byte if ethutil.GetKeyRing().Len() != 0 { addr = ethutil.GetKeyRing().Get(0).Address() } pub := ethpub.NewPEthereum(ethereum) return &Gui{eth: ethereum, lib: lib, txDb: db, addr: addr, pub: pub} } func (gui *Gui) Start(assetPath string) { const version = "0.5.0 RC7" defer gui.txDb.Close() // Register ethereum functions qml.RegisterTypes("Ethereum", 1, 0, []qml.TypeSpec{{ Init: func(p *ethpub.PBlock, obj qml.Object) { p.Number = 0; p.Hash = "" }, }, { Init: func(p *ethpub.PTx, obj qml.Object) { p.Value = ""; p.Hash = ""; p.Address = "" }, }}) ethutil.Config.SetClientString(fmt.Sprintf("/Ethereal v%s", version)) ethutil.Config.Log.Infoln("[GUI] Starting GUI") // Create a new QML engine gui.engine = qml.NewEngine() context := gui.engine.Context() // Expose the eth library and the ui library to QML context.SetVar("eth", gui) gui.uiLib = NewUiLib(gui.engine, gui.eth, assetPath) context.SetVar("ui", gui.uiLib) // Load the main QML interface data, _ := ethutil.Config.Db.Get([]byte("KeyRing")) var win *qml.Window var err error if len(data) == 0 { win, err = gui.showKeyImport(context) } else { win, err = gui.showWallet(context) } if err != nil { ethutil.Config.Log.Infoln("FATAL: asset not found: you can set an alternative asset path on on the command line using option 'asset_path'") panic(err) } win.Show() win.Wait() gui.eth.Stop() } func (gui *Gui) showWallet(context *qml.Context) (*qml.Window, error) { component, err := gui.engine.LoadFile(gui.uiLib.AssetPath("qml/wallet.qml")) if err != nil { return nil, err } win := gui.createWindow(component) go gui.setInitialBlockChain() go gui.readPreviousTransactions() go gui.update() return win, nil } func (gui *Gui) showKeyImport(context *qml.Context) (*qml.Window, error) { context.SetVar("lib", gui.lib) component, err := gui.engine.LoadFile(gui.uiLib.AssetPath("qml/first_run.qml")) if err != nil { return nil, err } return gui.createWindow(component), nil } func (gui *Gui) createWindow(comp qml.Object) *qml.Window { win := comp.CreateWindow(nil) gui.win = win gui.uiLib.win = win db := &Debugger{gui.win, make(chan bool)} gui.lib.Db = db gui.uiLib.Db = db return gui.win } func (gui *Gui) setInitialBlockChain() { // Load previous 10 blocks chain := gui.eth.BlockChain().GetChain(gui.eth.BlockChain().CurrentBlock.Hash(), 10) for _, block := range chain { gui.processBlock(block) } } func (gui *Gui) readPreviousTransactions() { it := gui.txDb.Db().NewIterator(nil, nil) for it.Next() { tx := ethchain.NewTransactionFromBytes(it.Value()) gui.win.Root().Call("addTx", ethpub.NewPTx(tx)) } it.Release() } func (gui *Gui) processBlock(block *ethchain.Block) { gui.win.Root().Call("addBlock", ethpub.NewPBlock(block)) } func (gui *Gui) setWalletValue(amount, unconfirmedFunds *big.Int) { var str string if unconfirmedFunds != nil { 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(amount), pos, val) } else { str = fmt.Sprintf("%v", ethutil.CurrencyToString(amount)) } gui.win.Root().Call("setWalletValue", str) } // 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) reactor.Subscribe("newBlock", blockChan) reactor.Subscribe("newTx:pre", txChan) reactor.Subscribe("newTx:post", txChan) state := gui.eth.StateManager().TransState() unconfirmedFunds := new(big.Int) gui.win.Root().Call("setWalletValue", fmt.Sprintf("%v", ethutil.CurrencyToString(state.GetAccount(gui.addr).Amount))) for { select { case b := <-blockChan: block := b.Resource.(*ethchain.Block) if bytes.Compare(block.Coinbase, gui.addr) == 0 { gui.setWalletValue(gui.eth.StateManager().CurrentState().GetAccount(gui.addr).Amount, nil) } case txMsg := <-txChan: tx := txMsg.Resource.(*ethchain.Transaction) if txMsg.Event == "newTx:pre" { object := state.GetAccount(gui.addr) if bytes.Compare(tx.Sender(), gui.addr) == 0 && object.Nonce <= tx.Nonce { gui.win.Root().Call("addTx", ethpub.NewPTx(tx)) gui.txDb.Put(tx.Hash(), tx.RlpEncode()) /* object.Nonce += 1 state.SetStateObject(object) */ unconfirmedFunds.Sub(unconfirmedFunds, tx.Value) } else if bytes.Compare(tx.Recipient, gui.addr) == 0 { gui.win.Root().Call("addTx", ethpub.NewPTx(tx)) gui.txDb.Put(tx.Hash(), tx.RlpEncode()) unconfirmedFunds.Add(unconfirmedFunds, tx.Value) } gui.setWalletValue(object.Amount, unconfirmedFunds) } else { object := state.GetAccount(gui.addr) if bytes.Compare(tx.Sender(), gui.addr) == 0 { object.SubAmount(tx.Value) } else if bytes.Compare(tx.Recipient, gui.addr) == 0 { object.AddAmount(tx.Value) } gui.setWalletValue(object.Amount, nil) state.SetStateObject(object) } } } } // Logging functions that log directly to the GUI interface func (gui *Gui) Println(v ...interface{}) { str := strings.TrimRight(fmt.Sprintln(v...), "\n") lines := strings.Split(str, "\n") for _, line := range lines { gui.win.Root().Call("addLog", line) } } func (gui *Gui) Printf(format string, v ...interface{}) { str := strings.TrimRight(fmt.Sprintf(format, v...), "\n") lines := strings.Split(str, "\n") for _, line := range lines { gui.win.Root().Call("addLog", line) } } func (gui *Gui) Transact(recipient, value, gas, gasPrice, data string) (*ethpub.PReceipt, error) { keyPair := ethutil.GetKeyRing().Get(0) return gui.pub.Transact(ethutil.Hex(keyPair.PrivateKey), recipient, value, gas, gasPrice, data) } func (gui *Gui) Create(recipient, value, gas, gasPrice, data string) (*ethpub.PReceipt, error) { keyPair := ethutil.GetKeyRing().Get(0) mainInput, initInput := mutan.PreParse(data) return gui.pub.Create(ethutil.Hex(keyPair.PrivateKey), value, gas, gasPrice, initInput, mainInput) }