Merge remote-tracking branch 'upstream/develop' into evmjit

2015-03-02 18:46:55 +01:00 · 2015-03-02 18:46:55 +01:00 · 24003c76d1
parent 9c6d9dfc5c 65cad14f9b
commit 24003c76d1
47 changed files with 1246 additions and 875 deletions
--- a/.travis.yml
+++ b/.travis.yml
@ -1,8 +1,8 @@
 language: go
 go:
-  - 1.4.1
+  - 1.4.2
 before_install:
-  - sudo add-apt-repository ppa:beineri/opt-qt54 -y
+  - sudo add-apt-repository ppa:beineri/opt-qt541 -y
  - sudo apt-get update -qq
  - sudo apt-get install -yqq libgmp3-dev libreadline6-dev qt54quickcontrols qt54webengine
 install:
--- a/12
+++ b/12
@ -1,4 +1,4 @@
-FROM ubuntu:14.04.1
+FROM ubuntu:14.04.2

 ## Environment setup
 ENV HOME /root
@ -12,22 +12,22 @@ ENV DEBIAN_FRONTEND noninteractive
 RUN apt-get update && apt-get upgrade -y
 RUN apt-get install -y git mercurial build-essential software-properties-common wget pkg-config libgmp3-dev libreadline6-dev libpcre3-dev libpcre++-dev

-## Install Qt5.4 (not required for CLI)
-# RUN add-apt-repository ppa:beineri/opt-qt54-trusty -y
+## Install Qt5.4.1 (not required for CLI)
+# RUN add-apt-repository ppa:beineri/opt-qt541-trusty -y
 # RUN apt-get update -y
 # RUN apt-get install -y qt54quickcontrols qt54webengine mesa-common-dev libglu1-mesa-dev
 # ENV PKG_CONFIG_PATH /opt/qt54/lib/pkgconfig

 # Install Golang
-RUN wget https://storage.googleapis.com/golang/go1.4.1.linux-amd64.tar.gz
+RUN wget https://storage.googleapis.com/golang/go1.4.2.linux-amd64.tar.gz
 RUN tar -C /usr/local -xzf go*.tar.gz && go version

 # this is a workaround, to make sure that docker's cache is invalidated whenever the git repo changes
 ADD https://api.github.com/repos/ethereum/go-ethereum/git/refs/heads/develop file_does_not_exist

 ## Fetch and install go-ethereum
-RUN go get -v github.com/tools/godep
-RUN go get -v -d github.com/ethereum/go-ethereum/...
+RUN go get github.com/tools/godep
+RUN go get -d github.com/ethereum/go-ethereum/...
 WORKDIR $GOPATH/src/github.com/ethereum/go-ethereum
 RUN git checkout develop
 RUN godep restore
--- a/Godeps/Godeps.json
+++ b/Godeps/Godeps.json
@ -1,15 +1,10 @@
 {
 	"ImportPath": "github.com/ethereum/go-ethereum",
-	"GoVersion": "go1.4.1",
+	"GoVersion": "go1.4.2",
 	"Packages": [
 		"./..."
 	],
 	"Deps": [
-		{
-			"ImportPath": "bitbucket.org/kardianos/osext",
-			"Comment": "null-13",
-			"Rev": "5d3ddcf53a508cc2f7404eaebf546ef2cb5cdb6e"
-		},
 		{
 			"ImportPath": "code.google.com/p/go-uuid/uuid",
 			"Comment": "null-12",
@ -37,6 +32,10 @@
 			"ImportPath": "github.com/jackpal/go-nat-pmp",
 			"Rev": "a45aa3d54aef73b504e15eb71bea0e5565b5e6e1"
 		},
+		{
+			"ImportPath": "github.com/kardianos/osext",
+			"Rev": "ccfcd0245381f0c94c68f50626665eed3c6b726a"
+		},
 		{
 			"ImportPath": "github.com/obscuren/otto",
 			"Rev": "cf13cc4228c5e5ce0fe27a7aea90bc10091c4f19"
--- a/Godeps/_workspace/src/bitbucket.org/kardianos/osext/LICENSE
+++ b/Godeps/_workspace/src/bitbucket.org/kardianos/osext/LICENSE
@ -1,20 +0,0 @@
-Copyright (c) 2012 Daniel Theophanes
-
-This software is provided 'as-is', without any express or implied
-warranty. In no event will the authors be held liable for any damages
-arising from the use of this software.
-
-Permission is granted to anyone to use this software for any purpose,
-including commercial applications, and to alter it and redistribute it
-freely, subject to the following restrictions:
-
-   1. The origin of this software must not be misrepresented; you must not
-   claim that you wrote the original software. If you use this software
-   in a product, an acknowledgment in the product documentation would be
-   appreciated but is not required.
-
-   2. Altered source versions must be plainly marked as such, and must not be
-   misrepresented as being the original software.
-
-   3. This notice may not be removed or altered from any source
-   distribution.
--- a/Godeps/_workspace/src/github.com/kardianos/osext/LICENSE
+++ b/Godeps/_workspace/src/github.com/kardianos/osext/LICENSE
@ -0,0 +1,27 @@
+Copyright (c) 2012 The Go Authors. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+   * Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+   * Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the following disclaimer
+in the documentation and/or other materials provided with the
+distribution.
+   * Neither the name of Google Inc. nor the names of its
+contributors may be used to endorse or promote products derived from
+this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
--- a/Godeps/_workspace/src/github.com/kardianos/osext/README.md
+++ b/Godeps/_workspace/src/github.com/kardianos/osext/README.md
@ -0,0 +1,14 @@
+### Extensions to the "os" package.
+
+## Find the current Executable and ExecutableFolder.
+
+There is sometimes utility in finding the current executable file
+that is running. This can be used for upgrading the current executable
+or finding resources located relative to the executable file.
+
+Multi-platform and supports:
+ * Linux
+ * OS X
+ * Windows
+ * Plan 9
+ * BSDs.
--- a/Godeps/_workspace/src/bitbucket.org/kardianos/osext/osext.go
+++ b/Godeps/_workspace/src/bitbucket.org/kardianos/osext/osext.go
@ -25,8 +25,3 @@ func ExecutableFolder() (string, error) {
 	folder, _ := filepath.Split(p)
 	return folder, nil
 }
-
-// Depricated. Same as Executable().
-func GetExePath() (exePath string, err error) {
-	return Executable()
-}
--- a/Godeps/_workspace/src/bitbucket.org/kardianos/osext/osext_plan9.go
+++ b/Godeps/_workspace/src/bitbucket.org/kardianos/osext/osext_plan9.go
@ -5,9 +5,9 @@
 package osext

 import (
-    "syscall"
 	"os"
 	"strconv"
+	"syscall"
 )

 func executable() (string, error) {
--- a/Godeps/_workspace/src/bitbucket.org/kardianos/osext/osext_procfs.go
+++ b/Godeps/_workspace/src/bitbucket.org/kardianos/osext/osext_procfs.go
@ -2,12 +2,13 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.

-// +build linux netbsd openbsd
+// +build linux netbsd openbsd solaris dragonfly

 package osext

 import (
 	"errors"
+	"fmt"
 	"os"
 	"runtime"
 )
@ -18,8 +19,10 @@ func executable() (string, error) {
 		return os.Readlink("/proc/self/exe")
 	case "netbsd":
 		return os.Readlink("/proc/curproc/exe")
-	case "openbsd":
+	case "openbsd", "dragonfly":
 		return os.Readlink("/proc/curproc/file")
+	case "solaris":
+		return os.Readlink(fmt.Sprintf("/proc/%d/path/a.out", os.Getpid()))
 	}
 	return "", errors.New("ExecPath not implemented for " + runtime.GOOS)
 }
--- a/Godeps/_workspace/src/bitbucket.org/kardianos/osext/osext_sysctl.go
+++ b/Godeps/_workspace/src/bitbucket.org/kardianos/osext/osext_sysctl.go
--- a/Godeps/_workspace/src/bitbucket.org/kardianos/osext/osext_test.go
+++ b/Godeps/_workspace/src/bitbucket.org/kardianos/osext/osext_test.go
--- a/Godeps/_workspace/src/bitbucket.org/kardianos/osext/osext_windows.go
+++ b/Godeps/_workspace/src/bitbucket.org/kardianos/osext/osext_windows.go
--- a/accounts/account_manager.go
+++ b/accounts/account_manager.go
@ -34,9 +34,16 @@ package accounts

 import (
 	crand "crypto/rand"
+
+	"errors"
+	"sync"
+	"time"
+
 	"github.com/ethereum/go-ethereum/crypto"
 )

+var ErrLocked = errors.New("account is locked; please request passphrase")
+
 // TODO: better name for this struct?
 type Account struct {
 	Address []byte
@ -44,23 +51,45 @@ type Account struct {

 type AccountManager struct {
 	keyStore           crypto.KeyStore2
+	unlockedKeys       map[string]crypto.Key
+	unlockMilliseconds time.Duration
+	mutex              sync.RWMutex
 }

-// TODO: get key by addr - modify KeyStore2 GetKey to work with addr
-
-// TODO: pass through passphrase for APIs which require access to private key?
-func NewAccountManager(keyStore crypto.KeyStore2) AccountManager {
+func NewAccountManager(keyStore crypto.KeyStore2, unlockMilliseconds time.Duration) AccountManager {
+	keysMap := make(map[string]crypto.Key)
 	am := &AccountManager{
 		keyStore:           keyStore,
+		unlockedKeys:       keysMap,
+		unlockMilliseconds: unlockMilliseconds,
 	}
 	return *am
 }

-func (am *AccountManager) Sign(fromAccount *Account, keyAuth string, toSign []byte) (signature []byte, err error) {
+func (am AccountManager) DeleteAccount(address []byte, auth string) error {
+	return am.keyStore.DeleteKey(address, auth)
+}
+
+func (am *AccountManager) Sign(fromAccount *Account, toSign []byte) (signature []byte, err error) {
+	am.mutex.RLock()
+	unlockedKey := am.unlockedKeys[string(fromAccount.Address)]
+	am.mutex.RUnlock()
+	if unlockedKey.Address == nil {
+		return nil, ErrLocked
+	}
+	signature, err = crypto.Sign(toSign, unlockedKey.PrivateKey)
+	return signature, err
+}
+
+func (am *AccountManager) SignLocked(fromAccount *Account, keyAuth string, toSign []byte) (signature []byte, err error) {
 	key, err := am.keyStore.GetKey(fromAccount.Address, keyAuth)
 	if err != nil {
 		return nil, err
 	}
+	am.mutex.RLock()
+	am.unlockedKeys[string(fromAccount.Address)] = *key
+	am.mutex.RUnlock()
+	go unlockLater(am, fromAccount.Address)
 	signature, err = crypto.Sign(toSign, key.PrivateKey)
 	return signature, err
 }
@ -76,8 +105,6 @@ func (am AccountManager) NewAccount(auth string) (*Account, error) {
 	return ua, err
 }

-// set of accounts == set of keys in given key store
-// TODO: do we need persistence of accounts as well?
 func (am *AccountManager) Accounts() ([]Account, error) {
 	addresses, err := am.keyStore.GetKeyAddresses()
 	if err != nil {
@ -93,3 +120,13 @@ func (am *AccountManager) Accounts() ([]Account, error) {
 	}
 	return accounts, err
 }
+
+func unlockLater(am *AccountManager, addr []byte) {
+	select {
+	case <-time.After(time.Millisecond * am.unlockMilliseconds):
+	}
+	am.mutex.RLock()
+	// TODO: how do we know the key is actually gone from memory?
+	delete(am.unlockedKeys, string(addr))
+	am.mutex.RUnlock()
+}
--- a/accounts/accounts_test.go
+++ b/accounts/accounts_test.go
@ -5,16 +5,78 @@ import (

 	"github.com/ethereum/go-ethereum/crypto"
 	"github.com/ethereum/go-ethereum/crypto/randentropy"
+	"github.com/ethereum/go-ethereum/ethutil"
+	"time"
 )

 func TestAccountManager(t *testing.T) {
-	ks := crypto.NewKeyStorePlain(crypto.DefaultDataDir())
-	am := NewAccountManager(ks)
+	ks := crypto.NewKeyStorePlain(ethutil.DefaultDataDir() + "/testaccounts")
+	am := NewAccountManager(ks, 100)
 	pass := "" // not used but required by API
 	a1, err := am.NewAccount(pass)
 	toSign := randentropy.GetEntropyCSPRNG(32)
-	_, err = am.Sign(a1, pass, toSign)
+	_, err = am.SignLocked(a1, pass, toSign)
 	if err != nil {
 		t.Fatal(err)
 	}
+
+	// Cleanup
+	time.Sleep(time.Millisecond * 150) // wait for locking
+
+	accounts, err := am.Accounts()
+	if err != nil {
+		t.Fatal(err)
+	}
+	for _, account := range accounts {
+		err := am.DeleteAccount(account.Address, pass)
+		if err != nil {
+			t.Fatal(err)
+		}
+	}
+}
+
+func TestAccountManagerLocking(t *testing.T) {
+	ks := crypto.NewKeyStorePassphrase(ethutil.DefaultDataDir() + "/testaccounts")
+	am := NewAccountManager(ks, 200)
+	pass := "foo"
+	a1, err := am.NewAccount(pass)
+	toSign := randentropy.GetEntropyCSPRNG(32)
+
+	// Signing without passphrase fails because account is locked
+	_, err = am.Sign(a1, toSign)
+	if err != ErrLocked {
+		t.Fatal(err)
+	}
+
+	// Signing with passphrase works
+	_, err = am.SignLocked(a1, pass, toSign)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	// Signing without passphrase works because account is temp unlocked
+	_, err = am.Sign(a1, toSign)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	// Signing without passphrase fails after automatic locking
+	time.Sleep(time.Millisecond * time.Duration(250))
+
+	_, err = am.Sign(a1, toSign)
+	if err != ErrLocked {
+		t.Fatal(err)
+	}
+
+	// Cleanup
+	accounts, err := am.Accounts()
+	if err != nil {
+		t.Fatal(err)
+	}
+	for _, account := range accounts {
+		err := am.DeleteAccount(account.Address, pass)
+		if err != nil {
+			t.Fatal(err)
+		}
+	}
 }
--- a/cmd/ethereum/flags.go
+++ b/cmd/ethereum/flags.go
@ -26,10 +26,11 @@ import (
 	"fmt"
 	"log"
 	"os"
-	"os/user"
 	"path"
+	"runtime"

 	"github.com/ethereum/go-ethereum/crypto"
+	"github.com/ethereum/go-ethereum/ethutil"
 	"github.com/ethereum/go-ethereum/logger"
 	"github.com/ethereum/go-ethereum/p2p/nat"
 	"github.com/ethereum/go-ethereum/vm"
@ -43,6 +44,7 @@ var (
 	KeyStore         string
 	StartRpc         bool
 	StartWebSockets  bool
+	RpcListenAddress string
 	RpcPort          int
 	WsPort           int
 	OutboundPort     string
@ -70,6 +72,7 @@ var (
 	SHH              bool
 	Dial             bool
 	PrintVersion     bool
+	MinerThreads     int
 )

 // flags specific to cli client
@ -79,12 +82,7 @@ var (
 	InputFile      string
 )

-func defaultDataDir() string {
-	usr, _ := user.Current()
-	return path.Join(usr.HomeDir, ".ethereum")
-}
-
-var defaultConfigFile = path.Join(defaultDataDir(), "conf.ini")
+var defaultConfigFile = path.Join(ethutil.DefaultDataDir(), "conf.ini")

 func Init() {
 	// TODO: move common flag processing to cmd/util
@ -98,6 +96,7 @@ func Init() {
 	flag.StringVar(&KeyRing, "keyring", "", "identifier for keyring to use")
 	flag.StringVar(&KeyStore, "keystore", "db", "system to store keyrings: db|file (db)")

+	flag.StringVar(&RpcListenAddress, "rpcaddr", "127.0.0.1", "address for json-rpc server to listen on")
 	flag.IntVar(&RpcPort, "rpcport", 8545, "port to start json-rpc server on")
 	flag.IntVar(&WsPort, "wsport", 40404, "port to start websocket rpc server on")
 	flag.BoolVar(&StartRpc, "rpc", false, "start rpc server")
@ -107,7 +106,7 @@ func Init() {
 	flag.StringVar(&SecretFile, "import", "", "imports the file given (hex or mnemonic formats)")
 	flag.StringVar(&ExportDir, "export", "", "exports the session keyring to files in the directory given")
 	flag.StringVar(&LogFile, "logfile", "", "log file (defaults to standard output)")
-	flag.StringVar(&Datadir, "datadir", defaultDataDir(), "specifies the datadir to use")
+	flag.StringVar(&Datadir, "datadir", ethutil.DefaultDataDir(), "specifies the datadir to use")
 	flag.StringVar(&ConfigFile, "conf", defaultConfigFile, "config file")
 	flag.StringVar(&DebugFile, "debug", "", "debug file (no debugging if not set)")
 	flag.IntVar(&LogLevel, "loglevel", int(logger.InfoLevel), "loglevel: 0-5: silent,error,warn,info,debug,debug detail)")
@ -124,6 +123,7 @@ func Init() {
 	flag.BoolVar(&StartMining, "mine", false, "start dagger mining")
 	flag.BoolVar(&StartJsConsole, "js", false, "launches javascript console")
 	flag.BoolVar(&PrintVersion, "version", false, "prints version number")
+	flag.IntVar(&MinerThreads, "minerthreads", runtime.NumCPU(), "number of miner threads")

 	// Network stuff
 	var (
@ -140,6 +140,12 @@ func Init() {

 	flag.Parse()

+	// When the javascript console is started log to a file instead
+	// of stdout
+	if StartJsConsole {
+		LogFile = path.Join(Datadir, "ethereum.log")
+	}
+
 	var err error
 	if NAT, err = nat.Parse(*natstr); err != nil {
 		log.Fatalf("-nat: %v", err)
--- a/cmd/ethereum/main.go
+++ b/cmd/ethereum/main.go
@ -37,7 +37,7 @@ import (

 const (
 	ClientIdentifier = "Ethereum(G)"
-	Version          = "0.8.5"
+	Version          = "0.8.6"
 )

 var clilogger = logger.NewLogger("CLI")
@ -76,6 +76,7 @@ func main() {
 		Dial:         Dial,
 		BootNodes:    BootNodes,
 		NodeKey:      NodeKey,
+		MinerThreads: MinerThreads,
 	})

 	if err != nil {
@ -113,10 +114,6 @@ func main() {
 		return
 	}

-	if StartMining {
-		utils.StartMining(ethereum)
-	}
-
 	if len(ImportChain) > 0 {
 		start := time.Now()
 		err := utils.ImportChain(ethereum, ImportChain)
@ -128,7 +125,7 @@ func main() {
 	}

 	if StartRpc {
-		utils.StartRpc(ethereum, RpcPort)
+		utils.StartRpc(ethereum, RpcListenAddress, RpcPort)
 	}

 	if StartWebSockets {
@ -137,6 +134,12 @@ func main() {

 	utils.StartEthereum(ethereum)

+	fmt.Printf("Welcome to the FRONTIER\n")
+
+	if StartMining {
+		ethereum.Miner().Start()
+	}
+
 	if StartJsConsole {
 		InitJsConsole(ethereum)
 	} else if len(InputFile) > 0 {
--- a/cmd/ethereum/repl/repl.go
+++ b/cmd/ethereum/repl/repl.go
@ -60,6 +60,7 @@ func (self *JSRepl) Start() {
 	if !self.running {
 		self.running = true
 		repllogger.Infoln("init JS Console")
+
 		reader := bufio.NewReader(self.history)
 		for {
 			line, err := reader.ReadString('\n')
--- a/cmd/mist/assets/examples/info.html
+++ b/cmd/mist/assets/examples/info.html
@ -62,6 +62,8 @@

    web3.setProvider(new web3.providers.HttpSyncProvider('http://localhost:8545'));

+    eth.defaultBlock = -2
+
    document.querySelector("#number").innerHTML = eth.number;
    document.querySelector("#coinbase").innerHTML = eth.coinbase
    document.querySelector("#peer_count").innerHTML = eth.peerCount;
@ -75,6 +77,7 @@
        document.querySelector("#number").innerHTML = eth.number;
    });

+
 </script>

 </html>
--- a/cmd/mist/assets/ext/ethereum.js/dist/ethereum.js
+++ b/cmd/mist/assets/ext/ethereum.js/dist/ethereum.js
--- a/cmd/mist/assets/qml/main.qml
+++ b/cmd/mist/assets/qml/main.qml
@ -964,7 +964,7 @@ ApplicationWindow {
                 anchors.top: parent.top
                 anchors.topMargin: 30
                 font.pointSize: 12
-                 text: "<h2>Mist (0.8.5)</h2><br><h3>Development</h3>Jeffrey Wilcke<br>Viktor Trón<br>Felix Lange<br>Taylor Gerring<br>Daniel Nagy<br>Gustav Simonsson<br><h3>UX/UI</h3>Alex van de Sande<br>Fabian Vogelsteller"
+                 text: "<h2>Mist (0.8.6)</h2><br><h3>Development</h3>Jeffrey Wilcke<br>Viktor Trón<br>Felix Lange<br>Taylor Gerring<br>Daniel Nagy<br>Gustav Simonsson<br><h3>UX/UI</h3>Alex van de Sande<br>Fabian Vogelsteller"
             }
         }

--- a/cmd/mist/flags.go
+++ b/cmd/mist/flags.go
@ -26,13 +26,11 @@ import (
 	"fmt"
 	"log"
 	"os"
-	"os/user"
 	"path"
-	"path/filepath"
 	"runtime"

-	"bitbucket.org/kardianos/osext"
 	"github.com/ethereum/go-ethereum/crypto"
+	"github.com/ethereum/go-ethereum/ethutil"
 	"github.com/ethereum/go-ethereum/logger"
 	"github.com/ethereum/go-ethereum/p2p/nat"
 	"github.com/ethereum/go-ethereum/vm"
@ -44,6 +42,7 @@ var (
 	KeyStore         string
 	StartRpc         bool
 	StartWebSockets  bool
+	RpcListenAddress string
 	RpcPort          int
 	WsPort           int
 	OutboundPort     string
@ -68,38 +67,7 @@ var (

 // flags specific to gui client
 var AssetPath string
-
-//TODO: If we re-use the one defined in cmd.go the binary osx image crashes. If somebody finds out why we can dry this up.
-func defaultAssetPath() string {
-	var assetPath string
-	// If the current working directory is the go-ethereum dir
-	// assume a debug build and use the source directory as
-	// asset directory.
-	pwd, _ := os.Getwd()
-	if pwd == path.Join(os.Getenv("GOPATH"), "src", "github.com", "ethereum", "go-ethereum", "cmd", "mist") {
-		assetPath = path.Join(pwd, "assets")
-	} else {
-		switch runtime.GOOS {
-		case "darwin":
-			// Get Binary Directory
-			exedir, _ := osext.ExecutableFolder()
-			assetPath = filepath.Join(exedir, "../Resources")
-		case "linux":
-			assetPath = "/usr/share/mist"
-		case "windows":
-			assetPath = "./assets"
-		default:
-			assetPath = "."
-		}
-	}
-	return assetPath
-}
-func defaultDataDir() string {
-	usr, _ := user.Current()
-	return path.Join(usr.HomeDir, ".ethereum")
-}
-
-var defaultConfigFile = path.Join(defaultDataDir(), "conf.ini")
+var defaultConfigFile = path.Join(ethutil.DefaultDataDir(), "conf.ini")

 func Init() {
 	// TODO: move common flag processing to cmd/utils
@ -112,6 +80,7 @@ func Init() {
 	flag.StringVar(&Identifier, "id", "", "Custom client identifier")
 	flag.StringVar(&KeyRing, "keyring", "", "identifier for keyring to use")
 	flag.StringVar(&KeyStore, "keystore", "db", "system to store keyrings: db|file (db)")
+	flag.StringVar(&RpcListenAddress, "rpcaddr", "127.0.0.1", "address for json-rpc server to listen on")
 	flag.IntVar(&RpcPort, "rpcport", 8545, "port to start json-rpc server on")
 	flag.IntVar(&WsPort, "wsport", 40404, "port to start websocket rpc server on")
 	flag.BoolVar(&StartRpc, "rpc", true, "start rpc server")
@ -121,12 +90,12 @@ func Init() {
 	flag.StringVar(&SecretFile, "import", "", "imports the file given (hex or mnemonic formats)")
 	flag.StringVar(&ExportDir, "export", "", "exports the session keyring to files in the directory given")
 	flag.StringVar(&LogFile, "logfile", "", "log file (defaults to standard output)")
-	flag.StringVar(&Datadir, "datadir", defaultDataDir(), "specifies the datadir to use")
+	flag.StringVar(&Datadir, "datadir", ethutil.DefaultDataDir(), "specifies the datadir to use")
 	flag.StringVar(&ConfigFile, "conf", defaultConfigFile, "config file")
 	flag.StringVar(&DebugFile, "debug", "", "debug file (no debugging if not set)")
 	flag.IntVar(&LogLevel, "loglevel", int(logger.InfoLevel), "loglevel: 0-5: silent,error,warn,info,debug,debug detail)")

-	flag.StringVar(&AssetPath, "asset_path", defaultAssetPath(), "absolute path to GUI assets directory")
+	flag.StringVar(&AssetPath, "asset_path", ethutil.DefaultAssetPath(), "absolute path to GUI assets directory")

 	// Network stuff
 	var (
--- a/cmd/mist/main.go
+++ b/cmd/mist/main.go
@ -36,7 +36,7 @@ import (

 const (
 	ClientIdentifier = "Mist"
-	Version          = "0.8.5"
+	Version          = "0.8.6"
 )

 var ethereum *eth.Ethereum
@ -73,7 +73,7 @@ func run() error {
 	utils.KeyTasks(ethereum.KeyManager(), KeyRing, GenAddr, SecretFile, ExportDir, NonInteractive)

 	if StartRpc {
-		utils.StartRpc(ethereum, RpcPort)
+		utils.StartRpc(ethereum, RpcListenAddress, RpcPort)
 	}

 	if StartWebSockets {
--- a/cmd/utils/cmd.go
+++ b/cmd/utils/cmd.go
@ -25,12 +25,8 @@ import (
 	"fmt"
 	"os"
 	"os/signal"
-	"path"
-	"path/filepath"
 	"regexp"
-	"runtime"

-	"bitbucket.org/kardianos/osext"
 	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/crypto"
 	"github.com/ethereum/go-ethereum/eth"
@ -132,31 +128,6 @@ func StartEthereum(ethereum *eth.Ethereum) {
 	})
 }

-func DefaultAssetPath() string {
-	var assetPath string
-	// If the current working directory is the go-ethereum dir
-	// assume a debug build and use the source directory as
-	// asset directory.
-	pwd, _ := os.Getwd()
-	if pwd == path.Join(os.Getenv("GOPATH"), "src", "github.com", "ethereum", "go-ethereum", "cmd", "mist") {
-		assetPath = path.Join(pwd, "assets")
-	} else {
-		switch runtime.GOOS {
-		case "darwin":
-			// Get Binary Directory
-			exedir, _ := osext.ExecutableFolder()
-			assetPath = filepath.Join(exedir, "../Resources")
-		case "linux":
-			assetPath = "/usr/share/mist"
-		case "windows":
-			assetPath = "./assets"
-		default:
-			assetPath = "."
-		}
-	}
-	return assetPath
-}
-
 func KeyTasks(keyManager *crypto.KeyManager, KeyRing string, GenAddr bool, SecretFile string, ExportDir string, NonInteractive bool) {

 	var err error
@ -189,9 +160,9 @@ func KeyTasks(keyManager *crypto.KeyManager, KeyRing string, GenAddr bool, Secre
 	clilogger.Infof("Main address %x\n", keyManager.Address())
 }

-func StartRpc(ethereum *eth.Ethereum, RpcPort int) {
+func StartRpc(ethereum *eth.Ethereum, RpcListenAddress string, RpcPort int) {
 	var err error
-	ethereum.RpcServer, err = rpchttp.NewRpcHttpServer(xeth.New(ethereum), RpcPort)
+	ethereum.RpcServer, err = rpchttp.NewRpcHttpServer(xeth.New(ethereum), RpcListenAddress, RpcPort)
 	if err != nil {
 		clilogger.Errorf("Could not start RPC interface (port %v): %v", RpcPort, err)
 	} else {
--- a/core/block_processor.go
+++ b/core/block_processor.go
@ -50,7 +50,6 @@ func NewBlockProcessor(db ethutil.Database, txpool *TxPool, chainManager *ChainM
 	sm := &BlockProcessor{
 		db:       db,
 		mem:      make(map[string]*big.Int),
-		//Pow:      &ethash.Ethash{},
 		Pow:      ezp.New(),
 		bc:       chainManager,
 		eventMux: eventMux,
@ -62,7 +61,7 @@ func NewBlockProcessor(db ethutil.Database, txpool *TxPool, chainManager *ChainM

 func (sm *BlockProcessor) TransitionState(statedb *state.StateDB, parent, block *types.Block, transientProcess bool) (receipts types.Receipts, err error) {
 	coinbase := statedb.GetOrNewStateObject(block.Header().Coinbase)
-	coinbase.SetGasPool(CalcGasLimit(parent, block))
+	coinbase.SetGasPool(block.Header().GasLimit)

 	// Process the transactions on to parent state
 	receipts, _, _, _, err = sm.ApplyTransactions(coinbase, statedb, block, block.Transactions(), transientProcess)
@ -100,7 +99,8 @@ func (self *BlockProcessor) ApplyTransaction(coinbase *state.StateObject, stated
 	// Notify all subscribers
 	if !transientProcess {
 		go self.eventMux.Post(TxPostEvent{tx})
-		go self.eventMux.Post(statedb.Logs())
+		logs := statedb.Logs()
+		go self.eventMux.Post(logs)
 	}

 	return receipt, txGas, err
@ -247,6 +247,11 @@ func (sm *BlockProcessor) ValidateBlock(block, parent *types.Block) error {
 		return fmt.Errorf("Difficulty check failed for block %v, %v", block.Header().Difficulty, expd)
 	}

+	expl := CalcGasLimit(parent, block)
+	if expl.Cmp(block.Header().GasLimit) != 0 {
+		return fmt.Errorf("GasLimit check failed for block %v, %v", block.Header().GasLimit, expl)
+	}
+
 	if block.Time() < parent.Time() {
 		return ValidationError("Block timestamp not after prev block (%v - %v)", block.Header().Time, parent.Header().Time)
 	}
--- a/core/genesis.go
+++ b/core/genesis.go
@ -51,8 +51,6 @@ func GenesisBlock(db ethutil.Database) *types.Block {
 	statedb.Sync()
 	genesis.Header().Root = statedb.Root()

-	fmt.Printf("+++ genesis +++\nRoot: %x\nHash: %x\n", genesis.Header().Root, genesis.Hash())
-
 	return genesis
 }

--- a/core/state_transition.go
+++ b/core/state_transition.go
@ -126,7 +126,7 @@ func (self *StateTransition) BuyGas() error {

 	self.AddGas(self.msg.Gas())
 	self.initialGas.Set(self.msg.Gas())
-	sender.SubAmount(MessageGasValue(self.msg))
+	sender.SubBalance(MessageGasValue(self.msg))

 	return nil
 }
@ -251,7 +251,7 @@ func (self *StateTransition) RefundGas() {
 	coinbase, sender := self.Coinbase(), self.From()
 	// Return remaining gas
 	remaining := new(big.Int).Mul(self.gas, self.msg.GasPrice())
-	sender.AddAmount(remaining)
+	sender.AddBalance(remaining)

 	uhalf := new(big.Int).Div(self.GasUsed(), ethutil.Big2)
 	for addr, ref := range self.state.Refunds() {
--- a/crypto/key_store_plain.go
+++ b/crypto/key_store_plain.go
@ -30,7 +30,6 @@ import (
 	"io"
 	"io/ioutil"
 	"os"
-	"os/user"
 	"path"
 )

@ -48,12 +47,6 @@ type keyStorePlain struct {
 	keysDirPath string
 }

-// TODO: copied from cmd/ethereum/flags.go
-func DefaultDataDir() string {
-	usr, _ := user.Current()
-	return path.Join(usr.HomeDir, ".ethereum")
-}
-
 func NewKeyStorePlain(path string) KeyStore2 {
 	return &keyStorePlain{path}
 }
@ -126,8 +119,11 @@ func GetKeyAddresses(keysDirPath string) (addresses [][]byte, err error) {
 	}
 	addresses = make([][]byte, len(fileInfos))
 	for i, fileInfo := range fileInfos {
-		addresses[i] = make([]byte, 40)
-		addresses[i] = []byte(fileInfo.Name())
+		address, err := hex.DecodeString(fileInfo.Name())
+		if err != nil {
+			continue
+		}
+		addresses[i] = address
 	}
 	return addresses, err
 }
--- a/crypto/key_store_test.go
+++ b/crypto/key_store_test.go
@ -2,12 +2,13 @@ package crypto

 import (
 	"github.com/ethereum/go-ethereum/crypto/randentropy"
+	"github.com/ethereum/go-ethereum/ethutil"
 	"reflect"
 	"testing"
 )

 func TestKeyStorePlain(t *testing.T) {
-	ks := NewKeyStorePlain(DefaultDataDir())
+	ks := NewKeyStorePlain(ethutil.DefaultDataDir())
 	pass := "" // not used but required by API
 	k1, err := ks.GenerateNewKey(randentropy.Reader, pass)
 	if err != nil {
@ -35,7 +36,7 @@ func TestKeyStorePlain(t *testing.T) {
 }

 func TestKeyStorePassphrase(t *testing.T) {
-	ks := NewKeyStorePassphrase(DefaultDataDir())
+	ks := NewKeyStorePassphrase(ethutil.DefaultDataDir())
 	pass := "foo"
 	k1, err := ks.GenerateNewKey(randentropy.Reader, pass)
 	if err != nil {
@ -61,7 +62,7 @@ func TestKeyStorePassphrase(t *testing.T) {
 }

 func TestKeyStorePassphraseDecryptionFail(t *testing.T) {
-	ks := NewKeyStorePassphrase(DefaultDataDir())
+	ks := NewKeyStorePassphrase(ethutil.DefaultDataDir())
 	pass := "foo"
 	k1, err := ks.GenerateNewKey(randentropy.Reader, pass)
 	if err != nil {
@ -89,7 +90,7 @@ func TestImportPreSaleKey(t *testing.T) {
 	// python pyethsaletool.py genwallet
 	// with password "foo"
 	fileContent := "{\"encseed\": \"26d87f5f2bf9835f9a47eefae571bc09f9107bb13d54ff12a4ec095d01f83897494cf34f7bed2ed34126ecba9db7b62de56c9d7cd136520a0427bfb11b8954ba7ac39b90d4650d3448e31185affcd74226a68f1e94b1108e6e0a4a91cdd83eba\", \"ethaddr\": \"d4584b5f6229b7be90727b0fc8c6b91bb427821f\", \"email\": \"gustav.simonsson@gmail.com\", \"btcaddr\": \"1EVknXyFC68kKNLkh6YnKzW41svSRoaAcx\"}"
-	ks := NewKeyStorePassphrase(DefaultDataDir())
+	ks := NewKeyStorePassphrase(ethutil.DefaultDataDir())
 	pass := "foo"
 	_, err := ImportPreSaleKey(ks, []byte(fileContent), pass)
 	if err != nil {
--- a/eth/backend.go
+++ b/eth/backend.go
@ -147,7 +147,8 @@ func New(config *Config) (*Ethereum, error) {
 	d, _ := db.Get([]byte("ProtocolVersion"))
 	protov := ethutil.NewValue(d).Uint()
 	if protov != ProtocolVersion && protov != 0 {
-		return nil, fmt.Errorf("Database version mismatch. Protocol(%d / %d). `rm -rf %s`", protov, ProtocolVersion, ethutil.Config.ExecPath+"/database")
+		path := path.Join(config.DataDir, "database")
+		return nil, fmt.Errorf("Database version mismatch. Protocol(%d / %d). `rm -rf %s`", protov, ProtocolVersion, path)
 	}

 	// Create new keymanager
--- a/ethutil/common.go
+++ b/ethutil/common.go
@ -3,10 +3,60 @@ package ethutil
 import (
 	"fmt"
 	"math/big"
+	"os"
+	"os/user"
+	"path"
+	"path/filepath"
 	"runtime"
 	"time"
+
+	"github.com/kardianos/osext"
 )

+func DefaultAssetPath() string {
+	var assetPath string
+	pwd, _ := os.Getwd()
+	srcdir := path.Join(os.Getenv("GOPATH"), "src", "github.com", "ethereum", "go-ethereum", "cmd", "mist")
+
+	// If the current working directory is the go-ethereum dir
+	// assume a debug build and use the source directory as
+	// asset directory.
+	if pwd == srcdir {
+		assetPath = path.Join(pwd, "assets")
+	} else {
+		switch runtime.GOOS {
+		case "darwin":
+			// Get Binary Directory
+			exedir, _ := osext.ExecutableFolder()
+			assetPath = filepath.Join(exedir, "../Resources")
+		case "linux":
+			assetPath = "/usr/share/mist"
+		case "windows":
+			assetPath = "./assets"
+		default:
+			assetPath = "."
+		}
+	}
+
+	// Check if the assetPath exists. If not, try the source directory
+	// This happens when binary is run from outside cmd/mist directory
+	if _, err := os.Stat(assetPath); os.IsNotExist(err) {
+		assetPath = path.Join(srcdir, "assets")
+	}
+
+	return assetPath
+}
+
+func DefaultDataDir() string {
+	usr, _ := user.Current()
+	if runtime.GOOS == "darwin" {
+		return path.Join(usr.HomeDir, "Library/Ethereum")
+	} else if runtime.GOOS == "windows" {
+		return path.Join(usr.HomeDir, "AppData/Roaming/Ethereum")
+	} else {
+		return path.Join(usr.HomeDir, ".ethereum")
+	}
+}
 func IsWindows() bool {
 	return runtime.GOOS == "windows"
 }
--- a/javascript/javascript_runtime.go
+++ b/javascript/javascript_runtime.go
@ -24,7 +24,7 @@ var jsrelogger = logger.NewLogger("JSRE")
 type JSRE struct {
 	ethereum *eth.Ethereum
 	Vm       *otto.Otto
-	pipe     *xeth.XEth
+	xeth     *xeth.XEth

 	events event.Subscription

@ -67,7 +67,7 @@ func NewJSRE(ethereum *eth.Ethereum) *JSRE {
 	// We have to make sure that, whoever calls this, calls "Stop"
 	go re.mainLoop()

-	re.Bind("eth", &JSEthereum{re.pipe, re.Vm, ethereum})
+	re.Bind("eth", &JSEthereum{re.xeth, re.Vm, ethereum})

 	re.initStdFuncs()

@ -113,12 +113,10 @@ func (self *JSRE) mainLoop() {
 func (self *JSRE) initStdFuncs() {
 	t, _ := self.Vm.Get("eth")
 	eth := t.Object()
-	eth.Set("watch", self.watch)
-	eth.Set("addPeer", self.addPeer)
+	eth.Set("connect", self.connect)
 	eth.Set("require", self.require)
 	eth.Set("stopMining", self.stopMining)
 	eth.Set("startMining", self.startMining)
-	eth.Set("execBlock", self.execBlock)
 	eth.Set("dump", self.dump)
 	eth.Set("export", self.export)
 }
@ -152,7 +150,8 @@ func (self *JSRE) dump(call otto.FunctionCall) otto.Value {
 	}

 	statedb := state.New(block.Root(), self.ethereum.Db())
-	v, _ := self.Vm.ToValue(statedb.Dump())
+
+	v, _ := self.Vm.ToValue(statedb.RawDump())

 	return v
 }
@ -167,36 +166,7 @@ func (self *JSRE) startMining(call otto.FunctionCall) otto.Value {
 	return v
 }

-// eth.watch
-func (self *JSRE) watch(call otto.FunctionCall) otto.Value {
-	addr, _ := call.Argument(0).ToString()
-	var storageAddr string
-	var cb otto.Value
-	var storageCallback bool
-	if len(call.ArgumentList) > 2 {
-		storageCallback = true
-		storageAddr, _ = call.Argument(1).ToString()
-		cb = call.Argument(2)
-	} else {
-		cb = call.Argument(1)
-	}
-
-	if storageCallback {
-		self.objectCb[addr+storageAddr] = append(self.objectCb[addr+storageAddr], cb)
-
-		// event := "storage:" + string(ethutil.Hex2Bytes(addr)) + ":" + string(ethutil.Hex2Bytes(storageAddr))
-		// self.ethereum.EventMux().Subscribe(event, self.changeChan)
-	} else {
-		self.objectCb[addr] = append(self.objectCb[addr], cb)
-
-		// event := "object:" + string(ethutil.Hex2Bytes(addr))
-		// self.ethereum.EventMux().Subscribe(event, self.changeChan)
-	}
-
-	return otto.UndefinedValue()
-}
-
-func (self *JSRE) addPeer(call otto.FunctionCall) otto.Value {
+func (self *JSRE) connect(call otto.FunctionCall) otto.Value {
 	nodeURL, err := call.Argument(0).ToString()
 	if err != nil {
 		return otto.FalseValue()
@ -222,22 +192,12 @@ func (self *JSRE) require(call otto.FunctionCall) otto.Value {
 	return t
 }

-func (self *JSRE) execBlock(call otto.FunctionCall) otto.Value {
-	hash, err := call.Argument(0).ToString()
-	if err != nil {
-		return otto.UndefinedValue()
-	}
-
-	err = utils.BlockDo(self.ethereum, ethutil.Hex2Bytes(hash))
-	if err != nil {
-		fmt.Println(err)
+func (self *JSRE) export(call otto.FunctionCall) otto.Value {
+	if len(call.ArgumentList) == 0 {
+		fmt.Println("err: require file name")
 		return otto.FalseValue()
 	}

-	return otto.TrueValue()
-}
-
-func (self *JSRE) export(call otto.FunctionCall) otto.Value {
 	fn, err := call.Argument(0).ToString()
 	if err != nil {
 		fmt.Println(err)
--- a/javascript/js_lib.go
+++ b/javascript/js_lib.go
@ -16,7 +16,7 @@ function pp(object) {
        str += " ]";
    } else if(typeof(object) === "object") {
        str += "{ ";
-        var last = Object.keys(object).sort().pop()
+        var last = Object.keys(object).pop()
        for(var k in object) {
            str += k + ": " + pp(object[k]);

--- a/miner/miner.go
+++ b/miner/miner.go
@ -52,10 +52,5 @@ func (self *Miner) Stop() {
 }

 func (self *Miner) HashRate() int64 {
-	var tot int64
-	for _, agent := range self.worker.agents {
-		tot += agent.Pow().GetHashrate()
-	}
-
-	return tot
+	return self.worker.HashRate()
 }
--- a/miner/worker.go
+++ b/miner/worker.go
@ -5,6 +5,7 @@ import (
 	"math/big"
 	"sort"
 	"sync"
+	"time"

 	"github.com/ethereum/go-ethereum/core"
 	"github.com/ethereum/go-ethereum/core/types"
@ -111,6 +112,8 @@ func (self *worker) register(agent Agent) {
 func (self *worker) update() {
 	events := self.mux.Subscribe(core.ChainEvent{}, core.NewMinedBlockEvent{})

+	timer := time.NewTicker(2 * time.Second)
+
 out:
 	for {
 		select {
@ -129,6 +132,8 @@ out:
 				agent.Stop()
 			}
 			break out
+		case <-timer.C:
+			minerlogger.Debugln("Hash rate:", self.HashRate(), "Khash")
 		}
 	}

@ -197,7 +202,7 @@ gasLimit:
 	}
 	self.eth.TxPool().RemoveSet(remove)

-	self.current.coinbase.AddAmount(core.BlockReward)
+	self.current.coinbase.AddBalance(core.BlockReward)

 	self.current.state.Update(ethutil.Big0)
 	self.push()
@ -225,7 +230,7 @@ func (self *worker) commitUncle(uncle *types.Header) error {
 	}

 	uncleAccount := self.current.state.GetAccount(uncle.Coinbase)
-	uncleAccount.AddAmount(uncleReward)
+	uncleAccount.AddBalance(uncleReward)

 	self.current.coinbase.AddBalance(uncleReward)

@ -244,3 +249,12 @@ func (self *worker) commitTransaction(tx *types.Transaction) error {

 	return nil
 }
+
+func (self *worker) HashRate() int64 {
+	var tot int64
+	for _, agent := range self.agents {
+		tot += agent.Pow().GetHashrate()
+	}
+
+	return tot
+}
--- a/rpc/packages.go
+++ b/rpc/packages.go
@ -20,18 +20,24 @@ import (
 	"github.com/ethereum/go-ethereum/crypto"
 	"github.com/ethereum/go-ethereum/ethdb"
 	"github.com/ethereum/go-ethereum/ethutil"
+	"github.com/ethereum/go-ethereum/event"
 	"github.com/ethereum/go-ethereum/event/filter"
 	"github.com/ethereum/go-ethereum/state"
+	"github.com/ethereum/go-ethereum/ui"
 	"github.com/ethereum/go-ethereum/xeth"
 )

-const (
-	defaultGasPrice = "10000000000000"
-	defaultGas      = "10000"
+var (
+	defaultGasPrice  = big.NewInt(10000000000000)
+	defaultGas       = big.NewInt(10000)
+	filterTickerTime = 15 * time.Second
 )

 type EthereumApi struct {
-	xeth          *xeth.XEth
+	eth    *xeth.XEth
+	xethMu sync.RWMutex
+	mux    *event.TypeMux
+
 	quit          chan struct{}
 	filterManager *filter.FilterManager

@ -45,17 +51,21 @@ type EthereumApi struct {
 	register map[string][]*NewTxArgs

 	db ethutil.Database
+
+	defaultBlockAge int64
 }

 func NewEthereumApi(eth *xeth.XEth) *EthereumApi {
 	db, _ := ethdb.NewLDBDatabase("dapps")
 	api := &EthereumApi{
-		xeth:          eth,
+		eth:             eth,
+		mux:             eth.Backend().EventMux(),
 		quit:            make(chan struct{}),
 		filterManager:   filter.NewFilterManager(eth.Backend().EventMux()),
 		logs:            make(map[int]*logFilter),
 		messages:        make(map[int]*whisperFilter),
 		db:              db,
+		defaultBlockAge: -1,
 	}
 	go api.filterManager.Start()
 	go api.start()
@ -63,6 +73,64 @@ func NewEthereumApi(eth *xeth.XEth) *EthereumApi {
 	return api
 }

+func (self *EthereumApi) setStateByBlockNumber(num int64) {
+	chain := self.xeth().Backend().ChainManager()
+	var block *types.Block
+
+	if self.defaultBlockAge < 0 {
+		num = chain.CurrentBlock().Number().Int64() + num + 1
+	}
+	block = chain.GetBlockByNumber(uint64(num))
+
+	if block != nil {
+		self.useState(state.New(block.Root(), self.xeth().Backend().Db()))
+	} else {
+		self.useState(chain.State())
+	}
+}
+
+func (self *EthereumApi) start() {
+	timer := time.NewTicker(filterTickerTime)
+	events := self.mux.Subscribe(core.ChainEvent{})
+
+done:
+	for {
+		select {
+		case ev := <-events.Chan():
+			switch ev.(type) {
+			case core.ChainEvent:
+				if self.defaultBlockAge < 0 {
+					self.setStateByBlockNumber(self.defaultBlockAge)
+				}
+			}
+		case <-timer.C:
+			self.logMut.Lock()
+			self.messagesMut.Lock()
+			for id, filter := range self.logs {
+				if time.Since(filter.timeout) > 20*time.Second {
+					self.filterManager.UninstallFilter(id)
+					delete(self.logs, id)
+				}
+			}
+
+			for id, filter := range self.messages {
+				if time.Since(filter.timeout) > 20*time.Second {
+					self.xeth().Whisper().Unwatch(id)
+					delete(self.messages, id)
+				}
+			}
+			self.logMut.Unlock()
+			self.messagesMut.Unlock()
+		case <-self.quit:
+			break done
+		}
+	}
+}
+
+func (self *EthereumApi) stop() {
+	close(self.quit)
+}
+
 func (self *EthereumApi) Register(args string, reply *interface{}) error {
 	self.regmut.Lock()
 	defer self.regmut.Unlock()
@ -95,7 +163,7 @@ func (self *EthereumApi) WatchTx(args string, reply *interface{}) error {

 func (self *EthereumApi) NewFilter(args *FilterOptions, reply *interface{}) error {
 	var id int
-	filter := core.NewFilter(self.xeth.Backend())
+	filter := core.NewFilter(self.xeth().Backend())
 	filter.SetOptions(toFilterOptions(args))
 	filter.LogsCallback = func(logs state.Logs) {
 		self.logMut.Lock()
@ -120,7 +188,7 @@ func (self *EthereumApi) UninstallFilter(id int, reply *interface{}) error {

 func (self *EthereumApi) NewFilterString(args string, reply *interface{}) error {
 	var id int
-	filter := core.NewFilter(self.xeth.Backend())
+	filter := core.NewFilter(self.xeth().Backend())

 	callback := func(block *types.Block) {
 		self.logMut.Lock()
@ -165,7 +233,7 @@ func (self *EthereumApi) Logs(id int, reply *interface{}) error {
 }

 func (self *EthereumApi) AllLogs(args *FilterOptions, reply *interface{}) error {
-	filter := core.NewFilter(self.xeth.Backend())
+	filter := core.NewFilter(self.xeth().Backend())
 	filter.SetOptions(toFilterOptions(args))

 	*reply = toLogs(filter.Find())
@ -174,41 +242,54 @@ func (self *EthereumApi) AllLogs(args *FilterOptions, reply *interface{}) error
 }

 func (p *EthereumApi) GetBlock(args *GetBlockArgs, reply *interface{}) error {
-	err := args.requirements()
-	if err != nil {
-		return err
-	}
-
-	if args.BlockNumber > 0 {
-		*reply = p.xeth.BlockByNumber(args.BlockNumber)
+	// This seems a bit precarious Maybe worth splitting to discrete functions
+	if len(args.Hash) > 0 {
+		*reply = p.xeth().BlockByHash(args.Hash)
 	} else {
-		*reply = p.xeth.BlockByHash(args.Hash)
+		*reply = p.xeth().BlockByNumber(args.BlockNumber)
 	}
 	return nil
 }

 func (p *EthereumApi) Transact(args *NewTxArgs, reply *interface{}) error {
 	if len(args.Gas) == 0 {
-		args.Gas = defaultGas
+		args.Gas = defaultGas.String()
 	}

 	if len(args.GasPrice) == 0 {
-		args.GasPrice = defaultGasPrice
+		args.GasPrice = defaultGasPrice.String()
 	}

 	// TODO if no_private_key then
-	if _, exists := p.register[args.From]; exists {
-		p.register[args.From] = append(p.register[args.From], args)
-	} else {
-		result, _ := p.xeth.Transact( /* TODO specify account */ args.To, args.Value, args.Gas, args.GasPrice, args.Data)
-		*reply = result
+	//if _, exists := p.register[args.From]; exists {
+	//	p.register[args.From] = append(p.register[args.From], args)
+	//} else {
+	/*
+		account := accounts.Get(fromHex(args.From))
+		if account != nil {
+			if account.Unlocked() {
+				if !unlockAccount(account) {
+					return
 				}
+			}
+
+			result, _ := account.Transact(fromHex(args.To), fromHex(args.Value), fromHex(args.Gas), fromHex(args.GasPrice), fromHex(args.Data))
+			if len(result) > 0 {
+				*reply = toHex(result)
+			}
+		} else if _, exists := p.register[args.From]; exists {
+			p.register[ags.From] = append(p.register[args.From], args)
+		}
+	*/
+	result, _ := p.xeth().Transact( /* TODO specify account */ args.To, args.Value, args.Gas, args.GasPrice, args.Data)
+	*reply = result
+	//}

 	return nil
 }

 func (p *EthereumApi) Call(args *NewTxArgs, reply *interface{}) error {
-	result, err := p.xeth.Call( /* TODO specify account */ args.To, args.Value, args.Gas, args.GasPrice, args.Data)
+	result, err := p.xeth().Call( /* TODO specify account */ args.To, args.Value, args.Gas, args.GasPrice, args.Data)
 	if err != nil {
 		return err
 	}
@ -222,7 +303,7 @@ func (p *EthereumApi) PushTx(args *PushTxArgs, reply *interface{}) error {
 	if err != nil {
 		return err
 	}
-	result, _ := p.xeth.PushTx(args.Tx)
+	result, _ := p.xeth().PushTx(args.Tx)
 	*reply = result
 	return nil
 }
@ -233,7 +314,7 @@ func (p *EthereumApi) GetStateAt(args *GetStateArgs, reply *interface{}) error {
 		return err
 	}

-	state := p.xeth.State().SafeGet(args.Address)
+	state := p.xeth().State().SafeGet(args.Address)

 	value := state.StorageString(args.Key)
 	var hx string
@ -255,42 +336,55 @@ func (p *EthereumApi) GetStorageAt(args *GetStorageArgs, reply *interface{}) err
 		return err
 	}

-	*reply = p.xeth.State().SafeGet(args.Address).Storage()
+	*reply = p.xeth().State().SafeGet(args.Address).Storage()
 	return nil
 }

 func (p *EthereumApi) GetPeerCount(reply *interface{}) error {
-	*reply = p.xeth.PeerCount()
+	*reply = p.xeth().PeerCount()
 	return nil
 }

 func (p *EthereumApi) GetIsListening(reply *interface{}) error {
-	*reply = p.xeth.IsListening()
+	*reply = p.xeth().IsListening()
 	return nil
 }

 func (p *EthereumApi) GetCoinbase(reply *interface{}) error {
-	*reply = p.xeth.Coinbase()
+	*reply = p.xeth().Coinbase()
 	return nil
 }

 func (p *EthereumApi) Accounts(reply *interface{}) error {
-	*reply = p.xeth.Accounts()
+	*reply = p.xeth().Accounts()
 	return nil
 }

 func (p *EthereumApi) GetIsMining(reply *interface{}) error {
-	*reply = p.xeth.IsMining()
+	*reply = p.xeth().IsMining()
 	return nil
 }

 func (p *EthereumApi) SetMining(shouldmine bool, reply *interface{}) error {
-	*reply = p.xeth.SetMining(shouldmine)
+	*reply = p.xeth().SetMining(shouldmine)
+	return nil
+}
+
+func (p *EthereumApi) GetDefaultBlockAge(reply *interface{}) error {
+	*reply = p.defaultBlockAge
+	return nil
+}
+
+func (p *EthereumApi) SetDefaultBlockAge(defaultBlockAge int64, reply *interface{}) error {
+	p.defaultBlockAge = defaultBlockAge
+	p.setStateByBlockNumber(p.defaultBlockAge)
+
+	*reply = true
 	return nil
 }

 func (p *EthereumApi) BlockNumber(reply *interface{}) error {
-	*reply = p.xeth.Backend().ChainManager().CurrentBlock().Number()
+	*reply = p.xeth().Backend().ChainManager().CurrentBlock().Number()
 	return nil
 }

@ -299,7 +393,7 @@ func (p *EthereumApi) GetTxCountAt(args *GetTxCountArgs, reply *interface{}) err
 	if err != nil {
 		return err
 	}
-	*reply = p.xeth.TxCountAt(args.Address)
+	*reply = p.xeth().TxCountAt(args.Address)
 	return nil
 }

@ -308,7 +402,7 @@ func (p *EthereumApi) GetBalanceAt(args *GetBalanceArgs, reply *interface{}) err
 	if err != nil {
 		return err
 	}
-	state := p.xeth.State().SafeGet(args.Address)
+	state := p.xeth().State().SafeGet(args.Address)
 	*reply = toHex(state.Balance().Bytes())
 	return nil
 }
@ -318,7 +412,7 @@ func (p *EthereumApi) GetCodeAt(args *GetCodeAtArgs, reply *interface{}) error {
 	if err != nil {
 		return err
 	}
-	*reply = p.xeth.CodeAt(args.Address)
+	*reply = p.xeth().CodeAt(args.Address)
 	return nil
 }

@ -365,7 +459,7 @@ func (p *EthereumApi) DbGet(args *DbArgs, reply *interface{}) error {
 }

 func (p *EthereumApi) NewWhisperIdentity(reply *interface{}) error {
-	*reply = p.xeth.Whisper().NewIdentity()
+	*reply = p.xeth().Whisper().NewIdentity()
 	return nil
 }

@ -376,7 +470,7 @@ func (p *EthereumApi) NewWhisperFilter(args *xeth.Options, reply *interface{}) e
 		defer p.messagesMut.Unlock()
 		p.messages[id].add(msg) // = append(p.messages[id], msg)
 	}
-	id = p.xeth.Whisper().Watch(args)
+	id = p.xeth().Whisper().Watch(args)
 	p.messages[id] = &whisperFilter{timeout: time.Now()}
 	*reply = id
 	return nil
@ -394,7 +488,7 @@ func (self *EthereumApi) MessagesChanged(id int, reply *interface{}) error {
 }

 func (p *EthereumApi) WhisperPost(args *WhisperMessageArgs, reply *interface{}) error {
-	err := p.xeth.Whisper().Post(args.Payload, args.To, args.From, args.Topic, args.Priority, args.Ttl)
+	err := p.xeth().Whisper().Post(args.Payload, args.To, args.From, args.Topic, args.Priority, args.Ttl)
 	if err != nil {
 		return err
 	}
@ -404,17 +498,17 @@ func (p *EthereumApi) WhisperPost(args *WhisperMessageArgs, reply *interface{})
 }

 func (p *EthereumApi) HasWhisperIdentity(args string, reply *interface{}) error {
-	*reply = p.xeth.Whisper().HasIdentity(args)
+	*reply = p.xeth().Whisper().HasIdentity(args)
 	return nil
 }

 func (p *EthereumApi) WhisperMessages(id int, reply *interface{}) error {
-	*reply = p.xeth.Whisper().Messages(id)
+	*reply = p.xeth().Whisper().Messages(id)
 	return nil
 }

 func (p *EthereumApi) GetRequestReply(req *RpcRequest, reply *interface{}) error {
-	// Spec at https://github.com/ethereum/wiki/wiki/Generic-ON-RPC
+	// Spec at https://github.com/ethereum/wiki/wiki/Generic-JSON-RPC
 	rpclogger.DebugDetailf("%T %s", req.Params, req.Params)
 	switch req.Method {
 	case "eth_coinbase":
@ -429,6 +523,14 @@ func (p *EthereumApi) GetRequestReply(req *RpcRequest, reply *interface{}) error
 			return err
 		}
 		return p.SetMining(args, reply)
+	case "eth_defaultBlock":
+		return p.GetDefaultBlockAge(reply)
+	case "eth_setDefaultBlock":
+		args, err := req.ToIntArgs()
+		if err != nil {
+			return err
+		}
+		return p.SetDefaultBlockAge(int64(args), reply)
 	case "eth_peerCount":
 		return p.GetPeerCount(reply)
 	case "eth_number":
@ -520,7 +622,7 @@ func (p *EthereumApi) GetRequestReply(req *RpcRequest, reply *interface{}) error
 		}
 		return p.AllLogs(args, reply)
 	case "eth_gasPrice":
-		*reply = defaultGasPrice
+		*reply = toHex(defaultGasPrice.Bytes())
 		return nil
 	case "eth_register":
 		args, err := req.ToRegisterArgs()
@ -599,44 +701,34 @@ func (p *EthereumApi) GetRequestReply(req *RpcRequest, reply *interface{}) error
 		}
 		return p.WhisperMessages(args, reply)
 	default:
-		return NewErrorResponse(fmt.Sprintf("%v %s", ErrorNotImplemented, req.Method))
+		return NewErrorWithMessage(errNotImplemented, req.Method)
 	}

 	rpclogger.DebugDetailf("Reply: %T %s", reply, reply)
 	return nil
 }

-var filterTickerTime = 15 * time.Second
+func (self *EthereumApi) xeth() *xeth.XEth {
+	self.xethMu.RLock()
+	defer self.xethMu.RUnlock()

-func (self *EthereumApi) start() {
-	timer := time.NewTicker(filterTickerTime)
-done:
-	for {
-		select {
-		case <-timer.C:
-			self.logMut.Lock()
-			self.messagesMut.Lock()
-			for id, filter := range self.logs {
-				if time.Since(filter.timeout) > 20*time.Second {
-					self.filterManager.UninstallFilter(id)
-					delete(self.logs, id)
-				}
-			}
-
-			for id, filter := range self.messages {
-				if time.Since(filter.timeout) > 20*time.Second {
-					self.xeth.Whisper().Unwatch(id)
-					delete(self.messages, id)
-				}
-			}
-			self.logMut.Unlock()
-			self.messagesMut.Unlock()
-		case <-self.quit:
-			break done
-		}
-	}
+	return self.eth
 }

-func (self *EthereumApi) stop() {
-	close(self.quit)
+func (self *EthereumApi) useState(statedb *state.StateDB) {
+	self.xethMu.Lock()
+	defer self.xethMu.Unlock()
+
+	self.eth = self.eth.UseState(statedb)
+}
+
+func t(f ui.Frontend) {
+	// Call the password dialog
+	ret, err := f.Call("PasswordDialog")
+	if err != nil {
+		fmt.Println(err)
+	}
+	// Get the first argument
+	t, _ := ret.Get(0)
+	fmt.Println("return:", t)
 }
--- a/rpc/packages_test.go
+++ b/rpc/packages_test.go
--- a/rpc/args.go
+++ b/rpc/args.go
@ -19,14 +19,7 @@ func (obj *GetBlockArgs) UnmarshalJSON(b []byte) (err error) {
 		obj.Hash = argstr
 		return
 	}
-	return NewErrorResponse(ErrorDecodeArgs)
-}
-
-func (obj *GetBlockArgs) requirements() error {
-	if obj.BlockNumber == 0 && obj.Hash == "" {
-		return NewErrorResponse("GetBlock requires either a block 'number' or a block 'hash' as argument")
-	}
-	return nil
+	return errDecodeArgs
 }

 type NewTxArgs struct {
@ -64,7 +57,7 @@ func (obj *NewTxArgs) UnmarshalJSON(b []byte) (err error) {
 		return
 	}

-	return NewErrorResponse(ErrorDecodeArgs)
+	return errDecodeArgs
 }

 type PushTxArgs struct {
@ -77,12 +70,12 @@ func (obj *PushTxArgs) UnmarshalJSON(b []byte) (err error) {
 		obj.Tx = arg0
 		return
 	}
-	return NewErrorResponse(ErrorDecodeArgs)
+	return errDecodeArgs
 }

 func (a *PushTxArgs) requirementsPushTx() error {
 	if a.Tx == "" {
-		return NewErrorResponse("PushTx requires a 'tx' as argument")
+		return NewErrorWithMessage(errArguments, "PushTx requires a 'tx' as argument")
 	}
 	return nil
 }
@ -93,14 +86,14 @@ type GetStorageArgs struct {

 func (obj *GetStorageArgs) UnmarshalJSON(b []byte) (err error) {
 	if err = json.Unmarshal(b, &obj.Address); err != nil {
-		return NewErrorResponse(ErrorDecodeArgs)
+		return errDecodeArgs
 	}
 	return
 }

 func (a *GetStorageArgs) requirements() error {
 	if len(a.Address) == 0 {
-		return NewErrorResponse("GetStorageAt requires an 'address' value as argument")
+		return NewErrorWithMessage(errArguments, "GetStorageAt requires an 'address' value as argument")
 	}
 	return nil
 }
@ -116,64 +109,39 @@ func (obj *GetStateArgs) UnmarshalJSON(b []byte) (err error) {
 		obj.Address = arg0
 		return
 	}
-	return NewErrorResponse(ErrorDecodeArgs)
+	return errDecodeArgs
 }

 func (a *GetStateArgs) requirements() error {
 	if a.Address == "" {
-		return NewErrorResponse("GetStorageAt requires an 'address' value as argument")
+		return NewErrorWithMessage(errArguments, "GetStorageAt requires an 'address' value as argument")
 	}
 	if a.Key == "" {
-		return NewErrorResponse("GetStorageAt requires an 'key' value as argument")
+		return NewErrorWithMessage(errArguments, "GetStorageAt requires an 'key' value as argument")
 	}
 	return nil
 }

-type GetStorageAtRes struct {
-	Key   string `json:"key"`
-	Value string `json:"value"`
-}
-
 type GetTxCountArgs struct {
 	Address string `json:"address"`
 }

-// type GetTxCountRes struct {
-//  Nonce int `json:"nonce"`
-// }
-
 func (obj *GetTxCountArgs) UnmarshalJSON(b []byte) (err error) {
 	arg0 := ""
 	if err = json.Unmarshal(b, &arg0); err == nil {
 		obj.Address = arg0
 		return
 	}
-	return NewErrorResponse("Could not determine JSON parameters")
+	return errDecodeArgs
 }

 func (a *GetTxCountArgs) requirements() error {
 	if a.Address == "" {
-		return NewErrorResponse("GetTxCountAt requires an 'address' value as argument")
+		return NewErrorWithMessage(errArguments, "GetTxCountAt requires an 'address' value as argument")
 	}
 	return nil
 }

-// type GetPeerCountRes struct {
-//  PeerCount int `json:"peerCount"`
-// }
-
-// type GetListeningRes struct {
-//  IsListening bool `json:"isListening"`
-// }
-
-// type GetCoinbaseRes struct {
-//  Coinbase string `json:"coinbase"`
-// }
-
-// type GetMiningRes struct {
-//  IsMining bool `json:"isMining"`
-// }
-
 type GetBalanceArgs struct {
 	Address string
 }
@ -184,21 +152,16 @@ func (obj *GetBalanceArgs) UnmarshalJSON(b []byte) (err error) {
 		obj.Address = arg0
 		return
 	}
-	return NewErrorResponse("Could not determine JSON parameters")
+	return errDecodeArgs
 }

 func (a *GetBalanceArgs) requirements() error {
 	if a.Address == "" {
-		return NewErrorResponse("GetBalanceAt requires an 'address' value as argument")
+		return NewErrorWithMessage(errArguments, "GetBalanceAt requires an 'address' value as argument")
 	}
 	return nil
 }

-type BalanceRes struct {
-	Balance string `json:"balance"`
-	Address string `json:"address"`
-}
-
 type GetCodeAtArgs struct {
 	Address string
 }
@ -209,12 +172,12 @@ func (obj *GetCodeAtArgs) UnmarshalJSON(b []byte) (err error) {
 		obj.Address = arg0
 		return
 	}
-	return NewErrorResponse(ErrorDecodeArgs)
+	return errDecodeArgs
 }

 func (a *GetCodeAtArgs) requirements() error {
 	if a.Address == "" {
-		return NewErrorResponse("GetCodeAt requires an 'address' value as argument")
+		return NewErrorWithMessage(errArguments, "GetCodeAt requires an 'address' value as argument")
 	}
 	return nil
 }
@ -225,7 +188,7 @@ type Sha3Args struct {

 func (obj *Sha3Args) UnmarshalJSON(b []byte) (err error) {
 	if err = json.Unmarshal(b, &obj.Data); err != nil {
-		return NewErrorResponse(ErrorDecodeArgs)
+		return errDecodeArgs
 	}
 	return
 }
@ -277,10 +240,10 @@ type DbArgs struct {

 func (a *DbArgs) requirements() error {
 	if len(a.Database) == 0 {
-		return NewErrorResponse("DbPutArgs requires an 'Database' value as argument")
+		return NewErrorWithMessage(errArguments, "DbPutArgs requires an 'Database' value as argument")
 	}
 	if len(a.Key) == 0 {
-		return NewErrorResponse("DbPutArgs requires an 'Key' value as argument")
+		return NewErrorWithMessage(errArguments, "DbPutArgs requires an 'Key' value as argument")
 	}
 	return nil
 }
--- a/rpc/http/server.go
+++ b/rpc/http/server.go
@ -29,8 +29,8 @@ import (
 var rpchttplogger = logger.NewLogger("RPC-HTTP")
 var JSON rpc.JsonWrapper

-func NewRpcHttpServer(pipe *xeth.XEth, port int) (*RpcHttpServer, error) {
-	sport := fmt.Sprintf("127.0.0.1:%d", port)
+func NewRpcHttpServer(pipe *xeth.XEth, address string, port int) (*RpcHttpServer, error) {
+	sport := fmt.Sprintf("%s:%d", address, port)
 	l, err := net.Listen("tcp", sport)
 	if err != nil {
 		return nil, err
@ -41,6 +41,7 @@ func NewRpcHttpServer(pipe *xeth.XEth, port int) (*RpcHttpServer, error) {
 		quit:     make(chan bool),
 		pipe:     pipe,
 		port:     port,
+		addr:     address,
 	}, nil
 }

@ -49,6 +50,7 @@ type RpcHttpServer struct {
 	listener net.Listener
 	pipe     *xeth.XEth
 	port     int
+	addr     string
 }

 func (s *RpcHttpServer) exitHandler() {
@ -69,7 +71,7 @@ func (s *RpcHttpServer) Stop() {
 }

 func (s *RpcHttpServer) Start() {
-	rpchttplogger.Infof("Starting RPC-HTTP server on port %d", s.port)
+	rpchttplogger.Infof("Starting RPC-HTTP server on %s:%d", s.addr, s.port)
 	go s.exitHandler()

 	api := rpc.NewEthereumApi(s.pipe)
@ -92,7 +94,7 @@ func (s *RpcHttpServer) apiHandler(api *rpc.EthereumApi) http.Handler {

 		reqParsed, reqerr := JSON.ParseRequestBody(req)
 		if reqerr != nil {
-			jsonerr := &rpc.RpcErrorObject{-32700, rpc.ErrorParseRequest}
+			jsonerr := &rpc.RpcErrorObject{-32700, "Error: Could not parse request"}
 			JSON.Send(w, &rpc.RpcErrorResponse{JsonRpc: jsonrpcver, ID: nil, Error: jsonerr})
 			return
 		}
--- a/rpc/messages.go
+++ b/rpc/messages.go
@ -25,12 +25,11 @@ import (
 	"github.com/ethereum/go-ethereum/xeth"
 )

-const (
-	ErrorArguments      = "Error: Insufficient arguments"
-	ErrorNotImplemented = "Error: Method not implemented"
-	ErrorUnknown        = "Error: Unknown error"
-	ErrorParseRequest   = "Error: Could not parse request"
-	ErrorDecodeArgs     = "Error: Could not decode arguments"
+var (
+	errArguments      = errors.New("Error: Insufficient arguments")
+	errNotImplemented = errors.New("Error: Method not implemented")
+	errUnknown        = errors.New("Error: Unknown error")
+	errDecodeArgs     = errors.New("Error: Could not decode arguments")
 )

 type RpcRequest struct {
@ -58,76 +57,72 @@ type RpcErrorObject struct {
 	// Data    interface{} `json:"data"`
 }

-func NewErrorResponse(msg string) error {
-	return errors.New(msg)
-}
-
-func NewErrorResponseWithError(msg string, err error) error {
-	return fmt.Errorf("%s: %v", msg, err)
+func NewErrorWithMessage(err error, msg string) error {
+	return fmt.Errorf("%s: %s", err.Error(), msg)
 }

 func (req *RpcRequest) ToSha3Args() (*Sha3Args, error) {
 	if len(req.Params) < 1 {
-		return nil, NewErrorResponse(ErrorArguments)
+		return nil, errArguments
 	}

 	args := new(Sha3Args)
 	r := bytes.NewReader(req.Params[0])
 	if err := json.NewDecoder(r).Decode(args); err != nil {
-		return nil, NewErrorResponse(ErrorDecodeArgs)
+		return nil, errDecodeArgs
 	}
-	rpclogger.DebugDetailf("%T %v", args, args)
+
 	return args, nil
 }

 func (req *RpcRequest) ToGetBlockArgs() (*GetBlockArgs, error) {
 	if len(req.Params) < 1 {
-		return nil, NewErrorResponse(ErrorArguments)
+		return nil, errArguments
 	}

 	args := new(GetBlockArgs)
 	r := bytes.NewReader(req.Params[0])
 	err := json.NewDecoder(r).Decode(args)
 	if err != nil {
-		return nil, NewErrorResponse(ErrorDecodeArgs)
+		return nil, errDecodeArgs
 	}
-	rpclogger.DebugDetailf("%T %v", args, args)
+
 	return args, nil
 }

 func (req *RpcRequest) ToNewTxArgs() (*NewTxArgs, error) {
 	if len(req.Params) < 1 {
-		return nil, NewErrorResponse(ErrorArguments)
+		return nil, errArguments
 	}

 	args := new(NewTxArgs)
 	r := bytes.NewReader(req.Params[0])
 	err := json.NewDecoder(r).Decode(args)
 	if err != nil {
-		return nil, NewErrorResponseWithError(ErrorDecodeArgs, err)
+		return nil, NewErrorWithMessage(errDecodeArgs, err.Error())
 	}
-	rpclogger.DebugDetailf("%T %v", args, args)
+
 	return args, nil
 }

 func (req *RpcRequest) ToPushTxArgs() (*PushTxArgs, error) {
 	if len(req.Params) < 1 {
-		return nil, NewErrorResponse(ErrorArguments)
+		return nil, errArguments
 	}

 	args := new(PushTxArgs)
 	r := bytes.NewReader(req.Params[0])
 	err := json.NewDecoder(r).Decode(args)
 	if err != nil {
-		return nil, NewErrorResponse(ErrorDecodeArgs)
+		return nil, errDecodeArgs
 	}
-	rpclogger.DebugDetailf("%T %v", args, args)
+
 	return args, nil
 }

 func (req *RpcRequest) ToGetStateArgs() (*GetStateArgs, error) {
 	if len(req.Params) < 1 {
-		return nil, NewErrorResponse(ErrorArguments)
+		return nil, errArguments
 	}

 	args := new(GetStateArgs)
@ -135,234 +130,241 @@ func (req *RpcRequest) ToGetStateArgs() (*GetStateArgs, error) {
 	r := bytes.NewReader(req.Params[0])
 	err := json.NewDecoder(r).Decode(args)
 	if err != nil {
-		return nil, NewErrorResponse(ErrorDecodeArgs)
+		return nil, errDecodeArgs
 	}
-	rpclogger.DebugDetailf("%T %v", args, args)
+
 	return args, nil
 }

 func (req *RpcRequest) ToStorageAtArgs() (*GetStorageArgs, error) {
 	if len(req.Params) < 1 {
-		return nil, NewErrorResponse(ErrorArguments)
+		return nil, errArguments
 	}

 	args := new(GetStorageArgs)
 	r := bytes.NewReader(req.Params[0])
 	err := json.NewDecoder(r).Decode(args)
 	if err != nil {
-		return nil, NewErrorResponse(ErrorDecodeArgs)
+		return nil, errDecodeArgs
 	}
-	rpclogger.DebugDetailf("%T %v", args, args)
+
 	return args, nil
 }

 func (req *RpcRequest) ToGetTxCountArgs() (*GetTxCountArgs, error) {
 	if len(req.Params) < 1 {
-		return nil, NewErrorResponse(ErrorArguments)
+		return nil, errArguments
 	}

 	args := new(GetTxCountArgs)
 	r := bytes.NewReader(req.Params[0])
 	err := json.NewDecoder(r).Decode(args)
 	if err != nil {
-		return nil, NewErrorResponse(ErrorDecodeArgs)
+		return nil, errDecodeArgs
 	}
-	rpclogger.DebugDetailf("%T %v", args, args)
+
 	return args, nil
 }

 func (req *RpcRequest) ToGetBalanceArgs() (*GetBalanceArgs, error) {
 	if len(req.Params) < 1 {
-		return nil, NewErrorResponse(ErrorArguments)
+		return nil, errArguments
 	}

 	args := new(GetBalanceArgs)
 	r := bytes.NewReader(req.Params[0])
 	err := json.NewDecoder(r).Decode(args)
 	if err != nil {
-		return nil, NewErrorResponse(ErrorDecodeArgs)
+		return nil, errDecodeArgs
 	}
-	rpclogger.DebugDetailf("%T %v", args, args)
+
 	return args, nil
 }

 func (req *RpcRequest) ToGetCodeAtArgs() (*GetCodeAtArgs, error) {
 	if len(req.Params) < 1 {
-		return nil, NewErrorResponse(ErrorArguments)
+		return nil, errArguments
 	}

 	args := new(GetCodeAtArgs)
 	r := bytes.NewReader(req.Params[0])
 	err := json.NewDecoder(r).Decode(args)
 	if err != nil {
-		return nil, NewErrorResponse(ErrorDecodeArgs)
+		return nil, errDecodeArgs
 	}
-	rpclogger.DebugDetailf("%T %v", args, args)
+
 	return args, nil
 }

 func (req *RpcRequest) ToBoolArgs() (bool, error) {
 	if len(req.Params) < 1 {
-		return false, NewErrorResponse(ErrorArguments)
+		return false, errArguments
 	}

 	var args bool
 	err := json.Unmarshal(req.Params[0], &args)
 	if err != nil {
-		return false, NewErrorResponse(ErrorDecodeArgs)
+		return false, errDecodeArgs
+	}
+
+	return args, nil
+}
+
+func (req *RpcRequest) ToIntArgs() (int, error) {
+	if len(req.Params) < 1 {
+		return 0, errArguments
+	}
+
+	var args int
+	if err := json.Unmarshal(req.Params[0], &args); err != nil {
+		return 0, errArguments
 	}

-	rpclogger.DebugDetailf("%T %v", args, args)
 	return args, nil
 }

 func (req *RpcRequest) ToCompileArgs() (string, error) {
 	if len(req.Params) < 1 {
-		return "", NewErrorResponse(ErrorArguments)
+		return "", errArguments
 	}

 	var args string
 	err := json.Unmarshal(req.Params[0], &args)
 	if err != nil {
-		return "", NewErrorResponse(ErrorDecodeArgs)
+		return "", errDecodeArgs
 	}

-	rpclogger.DebugDetailf("%T %v", args, args)
 	return args, nil
 }

 func (req *RpcRequest) ToFilterArgs() (*FilterOptions, error) {
 	if len(req.Params) < 1 {
-		return nil, NewErrorResponse(ErrorArguments)
+		return nil, errArguments
 	}

 	args := new(FilterOptions)
 	r := bytes.NewReader(req.Params[0])
 	err := json.NewDecoder(r).Decode(args)
 	if err != nil {
-		return nil, NewErrorResponse(ErrorDecodeArgs)
+		return nil, errDecodeArgs
 	}
-	rpclogger.DebugDetailf("%T %v", args, args)
 	return args, nil
 }

 func (req *RpcRequest) ToFilterStringArgs() (string, error) {
 	if len(req.Params) < 1 {
-		return "", NewErrorResponse(ErrorArguments)
+		return "", errArguments
 	}

 	var args string
 	err := json.Unmarshal(req.Params[0], &args)
 	if err != nil {
-		return "", NewErrorResponse(ErrorDecodeArgs)
+		return "", errDecodeArgs
 	}

-	rpclogger.DebugDetailf("%T %v", args, args)
 	return args, nil
 }

 func (req *RpcRequest) ToUninstallFilterArgs() (int, error) {
 	if len(req.Params) < 1 {
-		return 0, NewErrorResponse(ErrorArguments)
+		return 0, errArguments
 	}

 	var args int
 	err := json.Unmarshal(req.Params[0], &args)
 	if err != nil {
-		return 0, NewErrorResponse(ErrorDecodeArgs)
+		return 0, errDecodeArgs
 	}

-	rpclogger.DebugDetailf("%T %v", args, args)
 	return args, nil
 }

 func (req *RpcRequest) ToFilterChangedArgs() (int, error) {
 	if len(req.Params) < 1 {
-		return 0, NewErrorResponse(ErrorArguments)
+		return 0, errArguments
 	}

 	var id int
 	r := bytes.NewReader(req.Params[0])
 	err := json.NewDecoder(r).Decode(&id)
 	if err != nil {
-		return 0, NewErrorResponse(ErrorDecodeArgs)
+		return 0, errDecodeArgs
 	}
-	rpclogger.DebugDetailf("%T %v", id, id)
 	return id, nil
 }

 func (req *RpcRequest) ToDbPutArgs() (*DbArgs, error) {
 	if len(req.Params) < 3 {
-		return nil, NewErrorResponse(ErrorArguments)
+		return nil, errArguments
 	}

 	var args DbArgs
 	err := json.Unmarshal(req.Params[0], &args.Database)
 	if err != nil {
-		return nil, NewErrorResponseWithError(ErrorDecodeArgs, err)
+		return nil, NewErrorWithMessage(errDecodeArgs, err.Error())
 	}
 	err = json.Unmarshal(req.Params[1], &args.Key)
 	if err != nil {
-		return nil, NewErrorResponseWithError(ErrorDecodeArgs, err)
+		return nil, NewErrorWithMessage(errDecodeArgs, err.Error())
 	}
 	err = json.Unmarshal(req.Params[2], &args.Value)
 	if err != nil {
-		return nil, NewErrorResponseWithError(ErrorDecodeArgs, err)
+		return nil, NewErrorWithMessage(errDecodeArgs, err.Error())
 	}
-	rpclogger.DebugDetailf("%T %v", args, args)
+
 	return &args, nil
 }

 func (req *RpcRequest) ToDbGetArgs() (*DbArgs, error) {
 	if len(req.Params) < 2 {
-		return nil, NewErrorResponse(ErrorArguments)
+		return nil, errArguments
 	}

 	var args DbArgs
 	err := json.Unmarshal(req.Params[0], &args.Database)
 	if err != nil {
-		return nil, NewErrorResponseWithError(ErrorDecodeArgs, err)
+		return nil, NewErrorWithMessage(errDecodeArgs, err.Error())
 	}

 	err = json.Unmarshal(req.Params[1], &args.Key)
 	if err != nil {
-		return nil, NewErrorResponseWithError(ErrorDecodeArgs, err)
+		return nil, NewErrorWithMessage(errDecodeArgs, err.Error())
 	}
-	rpclogger.DebugDetailf("%T %v", args, args)
+
 	return &args, nil
 }

 func (req *RpcRequest) ToWhisperFilterArgs() (*xeth.Options, error) {
 	if len(req.Params) < 1 {
-		return nil, NewErrorResponse(ErrorArguments)
+		return nil, errArguments
 	}

 	var args xeth.Options
 	err := json.Unmarshal(req.Params[0], &args)
 	if err != nil {
-		return nil, NewErrorResponseWithError(ErrorDecodeArgs, err)
+		return nil, NewErrorWithMessage(errDecodeArgs, err.Error())
 	}
-	rpclogger.DebugDetailf("%T %v", args, args)
+
 	return &args, nil
 }

 func (req *RpcRequest) ToIdArgs() (int, error) {
 	if len(req.Params) < 1 {
-		return 0, NewErrorResponse(ErrorArguments)
+		return 0, errArguments
 	}

 	var id int
 	err := json.Unmarshal(req.Params[0], &id)
 	if err != nil {
-		return 0, NewErrorResponse(ErrorDecodeArgs)
+		return 0, errDecodeArgs
 	}
-	rpclogger.DebugDetailf("%T %v", id, id)
+
 	return id, nil
 }

 func (req *RpcRequest) ToWhisperPostArgs() (*WhisperMessageArgs, error) {
 	if len(req.Params) < 1 {
-		return nil, NewErrorResponse(ErrorArguments)
+		return nil, errArguments
 	}

 	var args WhisperMessageArgs
@ -370,13 +372,13 @@ func (req *RpcRequest) ToWhisperPostArgs() (*WhisperMessageArgs, error) {
 	if err != nil {
 		return nil, err
 	}
-	rpclogger.DebugDetailf("%T %v", args, args)
+
 	return &args, nil
 }

 func (req *RpcRequest) ToWhisperHasIdentityArgs() (string, error) {
 	if len(req.Params) < 1 {
-		return "", NewErrorResponse(ErrorArguments)
+		return "", errArguments
 	}

 	var args string
@ -384,13 +386,13 @@ func (req *RpcRequest) ToWhisperHasIdentityArgs() (string, error) {
 	if err != nil {
 		return "", err
 	}
-	rpclogger.DebugDetailf("%T %v", args, args)
+
 	return args, nil
 }

 func (req *RpcRequest) ToRegisterArgs() (string, error) {
 	if len(req.Params) < 1 {
-		return "", NewErrorResponse(ErrorArguments)
+		return "", errArguments
 	}

 	var args string
@ -398,13 +400,13 @@ func (req *RpcRequest) ToRegisterArgs() (string, error) {
 	if err != nil {
 		return "", err
 	}
-	rpclogger.DebugDetailf("%T %v", args, args)
+
 	return args, nil
 }

 func (req *RpcRequest) ToWatchTxArgs() (string, error) {
 	if len(req.Params) < 1 {
-		return "", NewErrorResponse(ErrorArguments)
+		return "", errArguments
 	}

 	var args string
@ -412,6 +414,6 @@ func (req *RpcRequest) ToWatchTxArgs() (string, error) {
 	if err != nil {
 		return "", err
 	}
-	rpclogger.DebugDetailf("%T %v", args, args)
+
 	return args, nil
 }
--- a/rpc/util.go
+++ b/rpc/util.go
@ -82,7 +82,7 @@ type RpcServer interface {

 type Log struct {
 	Address string   `json:"address"`
-	Topic   []string `json:"topics"`
+	Topic   []string `json:"topic"`
 	Data    string   `json:"data"`
 	Number  uint64   `json:"number"`
 }
--- a/rpc/ws/server.go
+++ b/rpc/ws/server.go
@ -99,7 +99,7 @@ func sockHandler(api *rpc.EthereumApi) websocket.Handler {

 			// reqParsed, reqerr := JSON.ParseRequestBody(conn.Request())
 			if err := websocket.JSON.Receive(conn, &reqParsed); err != nil {
-				jsonerr := &rpc.RpcErrorObject{-32700, rpc.ErrorParseRequest}
+				jsonerr := &rpc.RpcErrorObject{-32700, "Error: Could not parse request"}
 				JSON.Send(conn, &rpc.RpcErrorResponse{JsonRpc: jsonrpcver, ID: nil, Error: jsonerr})
 				continue
 			}
--- a/state/dump.go
+++ b/state/dump.go
@ -20,7 +20,7 @@ type World struct {
 	Accounts map[string]Account `json:"accounts"`
 }

-func (self *StateDB) Dump() []byte {
+func (self *StateDB) RawDump() World {
 	world := World{
 		Root:     ethutil.Bytes2Hex(self.trie.Root()),
 		Accounts: make(map[string]Account),
@ -35,12 +35,15 @@ func (self *StateDB) Dump() []byte {

 		storageIt := stateObject.State.trie.Iterator()
 		for storageIt.Next() {
-			account.Storage[ethutil.Bytes2Hex(it.Key)] = ethutil.Bytes2Hex(it.Value)
+			account.Storage[ethutil.Bytes2Hex(storageIt.Key)] = ethutil.Bytes2Hex(storageIt.Value)
 		}
 		world.Accounts[ethutil.Bytes2Hex(it.Key)] = account
 	}
+	return world
+}

-	json, err := json.MarshalIndent(world, "", "    ")
+func (self *StateDB) Dump() []byte {
+	json, err := json.MarshalIndent(self.RawDump(), "", "    ")
 	if err != nil {
 		fmt.Println("dump err", err)
 	}
--- a/state/state_object.go
+++ b/state/state_object.go
@ -19,6 +19,14 @@ func (self Code) String() string {

 type Storage map[string]*ethutil.Value

+func (self Storage) String() (str string) {
+	for key, value := range self {
+		str += fmt.Sprintf("%X : %X\n", key, value.Bytes())
+	}
+
+	return
+}
+
 func (self Storage) Copy() Storage {
 	cpy := make(Storage)
 	for key, value := range self {
@ -119,10 +127,9 @@ func (self *StateObject) GetStorage(key *big.Int) *ethutil.Value {
 }
 func (self *StateObject) SetStorage(key *big.Int, value *ethutil.Value) {
 	self.SetState(key.Bytes(), value)
-	self.dirty = true
 }

-func (self *StateObject) Storage() map[string]*ethutil.Value {
+func (self *StateObject) Storage() Storage {
 	return self.storage
 }

@ -172,20 +179,22 @@ func (c *StateObject) AddBalance(amount *big.Int) {

 	statelogger.Debugf("%x: #%d %v (+ %v)\n", c.Address(), c.nonce, c.balance, amount)
 }
-func (c *StateObject) AddAmount(amount *big.Int) { c.AddBalance(amount) }

 func (c *StateObject) SubBalance(amount *big.Int) {
 	c.SetBalance(new(big.Int).Sub(c.balance, amount))

 	statelogger.Debugf("%x: #%d %v (- %v)\n", c.Address(), c.nonce, c.balance, amount)
 }
-func (c *StateObject) SubAmount(amount *big.Int) { c.SubBalance(amount) }

 func (c *StateObject) SetBalance(amount *big.Int) {
 	c.balance = amount
 	c.dirty = true
 }

+func (c *StateObject) St() Storage {
+	return c.storage
+}
+
 //
 // Gas setters and getters
 //
@ -198,7 +207,7 @@ func (c *StateObject) ConvertGas(gas, price *big.Int) error {
 		return fmt.Errorf("insufficient amount: %v, %v", c.balance, total)
 	}

-	c.SubAmount(total)
+	c.SubBalance(total)

 	c.dirty = true

@ -221,7 +230,7 @@ func (self *StateObject) BuyGas(gas, price *big.Int) error {
 	rGas := new(big.Int).Set(gas)
 	rGas.Mul(rGas, price)

-	self.AddAmount(rGas)
+	self.AddBalance(rGas)

 	self.dirty = true

--- a/ui/frontend.go
+++ b/ui/frontend.go
@ -0,0 +1,18 @@
+package ui
+
+// ReturnInterface is returned by the Intercom interface when a method is called
+type ReturnInterface interface {
+	Get(i int) (interface{}, error)
+	Size() int
+}
+
+// Frontend is the basic interface for calling arbitrary methods on something that
+// implements a front end (GUI, CLI, etc)
+type Frontend interface {
+	// Checks whether a specific method is implemented
+	Supports(method string) bool
+	// Call calls the given method on interface it implements. This will return
+	// an error with errNotImplemented if the method hasn't been implemented
+	// and will return a ReturnInterface if it does.
+	Call(method string) (ReturnInterface, error)
+}
--- a/vm/vm.go
+++ b/vm/vm.go
@ -16,6 +16,8 @@ type Vm struct {
 	logStr string

 	err error
+	// For logging
+	debug bool

 	Dbg Debugger

@ -32,7 +34,7 @@ func New(env Environment) *Vm {
 		lt = LogTyDiff
 	}

-	return &Vm{env: env, logTy: lt, Recoverable: true}
+	return &Vm{debug: false, env: env, logTy: lt, Recoverable: true}
 }

 func (self *Vm) Run(me, caller ContextRef, code []byte, value, gas, price *big.Int, callData []byte) (ret []byte, err error) {
@ -664,6 +666,7 @@ func (self *Vm) Run(me, caller ContextRef, code []byte, value, gas, price *big.I
 				}
 				addr = ref.Address()

+				fmt.Printf("CREATE %X\n", addr)
 				stack.Push(ethutil.BigD(addr))

 			}
@ -727,7 +730,7 @@ func (self *Vm) Run(me, caller ContextRef, code []byte, value, gas, price *big.I

 			self.Printf(" => (%x) %v", receiver.Address()[:4], balance)

-			receiver.AddAmount(balance)
+			receiver.AddBalance(balance)
 			statedb.Delete(context.Address())

 			fallthrough
@ -828,7 +831,7 @@ func (self *Vm) calculateGasAndSize(context *Context, caller ContextRef, op OpCo
 			// 0 => non 0
 			mult = ethutil.Big3
 		} else if len(val) > 0 && len(y.Bytes()) == 0 {
-			statedb.Refund(caller.Address(), GasSStoreRefund)
+			statedb.Refund(self.env.Origin(), GasSStoreRefund)

 			mult = ethutil.Big0
 		} else {
@ -937,18 +940,22 @@ func (self *Vm) RunPrecompiled(p *PrecompiledAccount, callData []byte, context *
 }

 func (self *Vm) Printf(format string, v ...interface{}) VirtualMachine {
+	if self.debug {
 		if self.logTy == LogTyPretty {
 			self.logStr += fmt.Sprintf(format, v...)
 		}
+	}

 	return self
 }

 func (self *Vm) Endl() VirtualMachine {
+	if self.debug {
 		if self.logTy == LogTyPretty {
 			vmlogger.Debugln(self.logStr)
 			self.logStr = ""
 		}
+	}

 	return self
 }
--- a/xeth/state.go
+++ b/xeth/state.go
@ -4,18 +4,19 @@ import "github.com/ethereum/go-ethereum/state"

 type State struct {
 	xeth  *XEth
+	state *state.StateDB
 }

-func NewState(xeth *XEth) *State {
-	return &State{xeth}
+func NewState(xeth *XEth, statedb *state.StateDB) *State {
+	return &State{xeth, statedb}
 }

 func (self *State) State() *state.StateDB {
-	return self.xeth.chainManager.TransState()
+	return self.state
 }

 func (self *State) Get(addr string) *Object {
-	return &Object{self.State().GetStateObject(fromHex(addr))}
+	return &Object{self.state.GetStateObject(fromHex(addr))}
 }

 func (self *State) SafeGet(addr string) *Object {
@ -23,7 +24,7 @@ func (self *State) SafeGet(addr string) *Object {
 }

 func (self *State) safeGet(addr string) *state.StateObject {
-	object := self.State().GetStateObject(fromHex(addr))
+	object := self.state.GetStateObject(fromHex(addr))
 	if object == nil {
 		object = state.NewStateObject(fromHex(addr), self.xeth.eth.Db())
 	}
--- a/xeth/xeth.go
+++ b/xeth/xeth.go
@ -17,6 +17,7 @@ import (
 	"github.com/ethereum/go-ethereum/logger"
 	"github.com/ethereum/go-ethereum/miner"
 	"github.com/ethereum/go-ethereum/p2p"
+	"github.com/ethereum/go-ethereum/state"
 	"github.com/ethereum/go-ethereum/whisper"
 )

@ -54,13 +55,26 @@ func New(eth Backend) *XEth {
 		whisper:        NewWhisper(eth.Whisper()),
 		miner:          eth.Miner(),
 	}
-	xeth.state = NewState(xeth)
+	xeth.state = NewState(xeth, xeth.chainManager.TransState())

 	return xeth
 }

 func (self *XEth) Backend() Backend { return self.eth }
+func (self *XEth) UseState(statedb *state.StateDB) *XEth {
+	xeth := &XEth{
+		eth:            self.eth,
+		blockProcessor: self.blockProcessor,
+		chainManager:   self.chainManager,
+		whisper:        self.whisper,
+		miner:          self.miner,
+	}
+
+	xeth.state = NewState(xeth, statedb)
+	return xeth
+}
 func (self *XEth) State() *State { return self.state }
+
 func (self *XEth) Whisper() *Whisper   { return self.whisper }
 func (self *XEth) Miner() *miner.Miner { return self.miner }

@ -229,7 +243,7 @@ func (self *XEth) Call(toStr, valueStr, gasStr, gasPriceStr, dataStr string) (st
 	}

 	var (
-		statedb = self.chainManager.TransState()
+		statedb = self.State().State() //self.chainManager.TransState()
 		key     = self.eth.KeyManager().KeyPair()
 		from    = statedb.GetOrNewStateObject(key.Address())
 		block   = self.chainManager.CurrentBlock()