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) } }