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package ethui
import (
"fmt"
"github.com/ethereum/eth-go"
"github.com/ethereum/eth-go/ethchain"
"github.com/ethereum/eth-go/ethutil"
"github.com/ethereum/go-ethereum/utils"
"github.com/go-qml/qml"
"math/big"
"strings"
)
type AppContainer interface {
Create() error
Destroy()
Window() *qml.Window
Engine() *qml.Engine
NewBlock(*ethchain.Block)
ObjectChanged(*ethchain.StateObject)
StorageChanged(*ethchain.StateObject, []byte, *big.Int)
}
type ExtApplication struct {
*QEthereum
blockChan chan ethutil.React
changeChan chan ethutil.React
quitChan chan bool
container AppContainer
lib *UiLib
registeredEvents []string
}
func NewExtApplication(container AppContainer, lib *UiLib) *ExtApplication {
app := &ExtApplication{
NewQEthereum(lib.eth),
make(chan ethutil.React, 1),
make(chan ethutil.React, 1),
make(chan bool),
container,
lib,
nil,
}
return app
}
func (app *ExtApplication) run() {
// Set the "eth" api on to the containers context
context := app.container.Engine().Context()
context.SetVar("eth", app)
context.SetVar("ui", app.lib)
err := app.container.Create()
if err != nil {
fmt.Println(err)
return
}
// Call the main loop
go app.mainLoop()
// Subscribe to events
reactor := app.lib.eth.Reactor()
reactor.Subscribe("newBlock", app.blockChan)
win := app.container.Window()
win.Show()
win.Wait()
app.stop()
}
func (app *ExtApplication) stop() {
// Clean up
reactor := app.lib.eth.Reactor()
reactor.Unsubscribe("newBlock", app.blockChan)
for _, event := range app.registeredEvents {
reactor.Unsubscribe(event, app.changeChan)
}
// Kill the main loop
app.quitChan <- true
close(app.blockChan)
close(app.quitChan)
close(app.changeChan)
app.container.Destroy()
}
func (app *ExtApplication) mainLoop() {
out:
for {
select {
case <-app.quitChan:
break out
case block := <-app.blockChan:
if block, ok := block.Resource.(*ethchain.Block); ok {
app.container.NewBlock(block)
}
case object := <-app.changeChan:
if stateObject, ok := object.Resource.(*ethchain.StateObject); ok {
app.container.ObjectChanged(stateObject)
} else if _, ok := object.Resource.(*big.Int); ok {
//
}
}
}
}
func (app *ExtApplication) Watch(addr, storageAddr string) {
var event string
if len(storageAddr) == 0 {
event = "object:" + string(ethutil.FromHex(addr))
app.lib.eth.Reactor().Subscribe(event, app.changeChan)
} else {
event = "storage:" + string(ethutil.FromHex(addr)) + ":" + string(ethutil.FromHex(storageAddr))
app.lib.eth.Reactor().Subscribe(event, app.changeChan)
}
app.registeredEvents = append(app.registeredEvents, event)
}
type QEthereum struct {
stateManager *ethchain.StateManager
blockChain *ethchain.BlockChain
txPool *ethchain.TxPool
}
func NewQEthereum(eth *eth.Ethereum) *QEthereum {
return &QEthereum{
eth.StateManager(),
eth.BlockChain(),
eth.TxPool(),
}
}
func (lib *QEthereum) GetBlock(hexHash string) *QBlock {
hash := ethutil.FromHex(hexHash)
block := lib.blockChain.GetBlock(hash)
return &QBlock{Number: int(block.BlockInfo().Number), Hash: ethutil.Hex(block.Hash())}
}
func (lib *QEthereum) GetKey() string {
return ethutil.Hex(ethutil.Config.Db.GetKeys()[0].Address())
}
func (lib *QEthereum) GetStateObject(address string) *QStateObject {
stateObject := lib.stateManager.ProcState().GetContract(ethutil.FromHex(address))
if stateObject != nil {
return NewQStateObject(stateObject)
}
// See GetStorage for explanation on "nil"
return NewQStateObject(nil)
}
func (lib *QEthereum) Watch(addr, storageAddr string) {
// lib.stateManager.Watch(ethutil.FromHex(addr), ethutil.FromHex(storageAddr))
}
func (lib *QEthereum) CreateTx(key, recipient, valueStr, gasStr, gasPriceStr, dataStr string) (string, error) {
return lib.Transact(key, recipient, valueStr, gasStr, gasPriceStr, dataStr)
}
func (lib *QEthereum) Transact(key, recipient, valueStr, gasStr, gasPriceStr, dataStr string) (string, error) {
var hash []byte
var contractCreation bool
if len(recipient) == 0 {
contractCreation = true
} else {
hash = ethutil.FromHex(recipient)
}
keyPair := ethutil.Config.Db.GetKeys()[0]
value := ethutil.Big(valueStr)
gas := ethutil.Big(gasStr)
gasPrice := ethutil.Big(gasPriceStr)
var tx *ethchain.Transaction
// Compile and assemble the given data
if contractCreation {
// Compile script
mainScript, initScript, err := utils.CompileScript(dataStr)
if err != nil {
return "", err
}
tx = ethchain.NewContractCreationTx(value, gas, gasPrice, mainScript, initScript)
} else {
lines := strings.Split(dataStr, "\n")
var data []byte
for _, line := range lines {
data = append(data, ethutil.BigToBytes(ethutil.Big(line), 256)...)
}
tx = ethchain.NewTransactionMessage(hash, value, gas, gasPrice, data)
}
acc := lib.stateManager.GetAddrState(keyPair.Address())
tx.Nonce = acc.Nonce
tx.Sign(keyPair.PrivateKey)
lib.txPool.QueueTransaction(tx)
if contractCreation {
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()), nil
}
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