plugeth/ui/gui.go

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package ethui
import (
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"bytes"
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"encoding/hex"
"fmt"
"github.com/ethereum/eth-go"
"github.com/ethereum/eth-go/ethchain"
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"github.com/ethereum/eth-go/ethdb"
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"github.com/ethereum/eth-go/ethutil"
"github.com/niemeyer/qml"
"strings"
)
// Block interface exposed to QML
type Block struct {
Number int
Hash string
}
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type Tx struct {
Value, Hash, Address string
}
func NewTxFromTransaction(tx *ethchain.Transaction) *Tx {
hash := hex.EncodeToString(tx.Hash())
sender := hex.EncodeToString(tx.Recipient)
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return &Tx{Hash: hash, Value: ethutil.CurrencyToString(tx.Value), Address: sender}
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}
// 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}
}
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type Gui struct {
// The main application window
win *qml.Window
// QML Engine
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engine *qml.Engine
component *qml.Common
// The ethereum interface
eth *eth.Ethereum
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// The public Ethereum library
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lib *EthLib
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txDb *ethdb.LDBDatabase
addr []byte
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}
// Create GUI, but doesn't start it
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func New(ethereum *eth.Ethereum) *Gui {
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lib := &EthLib{blockManager: ethereum.BlockManager, blockChain: ethereum.BlockManager.BlockChain(), txPool: ethereum.TxPool}
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db, err := ethdb.NewLDBDatabase("tx_database")
if err != nil {
panic(err)
}
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data, _ := ethutil.Config.Db.Get([]byte("KeyRing"))
keyRing := ethutil.NewValueFromBytes(data)
addr := keyRing.Get(1).Bytes()
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ethereum.BlockManager.WatchAddr(addr)
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return &Gui{eth: ethereum, lib: lib, txDb: db, addr: addr}
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}
func (ui *Gui) Start() {
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defer ui.txDb.Close()
// Register ethereum functions
qml.RegisterTypes("Ethereum", 1, 0, []qml.TypeSpec{{
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Init: func(p *Block, obj qml.Object) { p.Number = 0; p.Hash = "" },
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}, {
Init: func(p *Tx, obj qml.Object) { p.Value = ""; p.Hash = ""; p.Address = "" },
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}})
ethutil.Config.Log.Infoln("[GUI] Starting GUI")
// Create a new QML engine
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ui.engine = qml.NewEngine()
// Load the main QML interface
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component, err := ui.engine.LoadFile("wallet.qml")
if err != nil {
panic(err)
}
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ui.engine.LoadFile("transactions.qml")
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ui.win = component.CreateWindow(nil)
context := ui.engine.Context()
// Expose the eth library and the ui library to QML
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context.SetVar("eth", ui.lib)
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context.SetVar("ui", &UiLib{engine: ui.engine, eth: ui.eth})
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// Register the ui as a block processor
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ui.eth.BlockManager.SecondaryBlockProcessor = ui
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//ui.eth.TxPool.SecondaryProcessor = ui
// Add the ui as a log system so we can log directly to the UGI
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ethutil.Config.Log.AddLogSystem(ui)
// Loads previous blocks
go ui.setInitialBlockChain()
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go ui.readPreviousTransactions()
go ui.update()
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ui.win.Show()
ui.win.Wait()
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ui.eth.Stop()
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}
func (ui *Gui) setInitialBlockChain() {
// Load previous 10 blocks
chain := ui.eth.BlockManager.BlockChain().GetChain(ui.eth.BlockManager.BlockChain().CurrentBlock.Hash(), 10)
for _, block := range chain {
ui.ProcessBlock(block)
}
}
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func (ui *Gui) readPreviousTransactions() {
it := ui.txDb.Db().NewIterator(nil)
for it.Next() {
tx := ethchain.NewTransactionFromBytes(it.Value())
ui.win.Root().Call("addTx", NewTxFromTransaction(tx))
}
it.Release()
}
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func (ui *Gui) ProcessBlock(block *ethchain.Block) {
ui.win.Root().Call("addBlock", NewBlockFromBlock(block))
}
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func (ui *Gui) ProcessTransaction(tx *ethchain.Transaction) {
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ui.txDb.Put(tx.Hash(), tx.RlpEncode())
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ui.win.Root().Call("addTx", NewTxFromTransaction(tx))
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// TODO replace with general subscribe model
}
// Simple go routine function that updates the list of peers in the GUI
func (ui *Gui) update() {
txChan := make(chan ethchain.TxMsg)
ui.eth.TxPool.Subscribe(txChan)
account := ui.eth.BlockManager.GetAddrState(ui.addr).Account
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ui.win.Root().Call("setWalletValue", fmt.Sprintf("%v", ethutil.CurrencyToString(account.Amount)))
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for {
select {
case txMsg := <-txChan:
tx := txMsg.Tx
ui.txDb.Put(tx.Hash(), tx.RlpEncode())
ui.win.Root().Call("addTx", NewTxFromTransaction(tx))
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// TODO FOR THE LOVE OF EVERYTHING GOOD IN THIS WORLD REFACTOR ME
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if txMsg.Type == ethchain.TxPre {
if bytes.Compare(tx.Sender(), ui.addr) == 0 {
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ui.win.Root().Call("setWalletValue", fmt.Sprintf("%v (- %v)", ethutil.CurrencyToString(account.Amount), ethutil.CurrencyToString(tx.Value)))
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ui.eth.BlockManager.GetAddrState(ui.addr).Nonce += 1
fmt.Println("Nonce", ui.eth.BlockManager.GetAddrState(ui.addr).Nonce)
} else if bytes.Compare(tx.Recipient, ui.addr) == 0 {
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ui.win.Root().Call("setWalletValue", fmt.Sprintf("%v (+ %v)", ethutil.CurrencyToString(account.Amount), ethutil.CurrencyToString(tx.Value)))
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}
} else {
if bytes.Compare(tx.Sender(), ui.addr) == 0 {
amount := account.Amount.Sub(account.Amount, tx.Value)
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ui.win.Root().Call("setWalletValue", fmt.Sprintf("%v", ethutil.CurrencyToString(amount)))
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} else if bytes.Compare(tx.Recipient, ui.addr) == 0 {
amount := account.Amount.Sub(account.Amount, tx.Value)
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ui.win.Root().Call("setWalletValue", fmt.Sprintf("%v", ethutil.CurrencyToString(amount)))
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}
}
}
/*
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)
*/
}
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}
// Logging functions that log directly to the GUI interface
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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)
}
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}
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)
}
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}