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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{blockManager: ethereum.BlockManager, blockChain: ethereum.BlockManager.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.BlockManager.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.Log.Infoln("[GUI] Starting GUI")
// Create a new QML engine
ui.engine = qml.NewEngine()
// Load the main QML interface
component, err := ui.engine.LoadFile(AssetPath("wallet.qml"))
if err != nil {
panic(err)
}
ui.engine.LoadFile(AssetPath("transactions.qml"))
ui.win = component.CreateWindow(nil)
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})
// 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.BlockManager.BlockChain().GetChain(ui.eth.BlockManager.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.BlockManager.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.BlockManager.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)
}
}
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