diff --git a/ethereal/config.go b/ethereal/config.go
index 817befc2c..3864126db 100644
--- a/ethereal/config.go
+++ b/ethereal/config.go
@@ -4,6 +4,7 @@ import (
 	"flag"
 )
 
+var Identifier string
 var StartConsole bool
 var StartMining bool
 var StartRpc bool
@@ -21,6 +22,7 @@ var DataDir string
 var AssetPath string
 
 func Init() {
+	flag.StringVar(&Identifier, "i", "", "Custom client identifier")
 	flag.BoolVar(&StartConsole, "c", false, "debug and testing console")
 	flag.BoolVar(&StartMining, "m", false, "start dagger mining")
 	flag.BoolVar(&StartRpc, "r", false, "start rpc server")
diff --git a/ethereal/ethereum.go b/ethereal/ethereum.go
index 206971b41..30187d956 100644
--- a/ethereal/ethereum.go
+++ b/ethereal/ethereum.go
@@ -39,7 +39,7 @@ func main() {
 	runtime.GOMAXPROCS(runtime.NumCPU())
 
 	ethchain.InitFees()
-	ethutil.ReadConfig(DataDir, ethutil.LogFile|ethutil.LogStd)
+	ethutil.ReadConfig(DataDir, ethutil.LogFile|ethutil.LogStd, Identifier)
 
 	// Instantiated a eth stack
 	ethereum, err := eth.New(eth.CapDefault, UseUPnP)
diff --git a/ethereal/ui/gui.go b/ethereal/ui/gui.go
index 7290bd6ec..022f192bf 100644
--- a/ethereal/ui/gui.go
+++ b/ethereal/ui/gui.go
@@ -9,7 +9,6 @@ import (
 	"github.com/ethereum/eth-go/ethpub"
 	"github.com/ethereum/eth-go/ethutil"
 	"github.com/go-qml/qml"
-	"github.com/obscuren/mutan"
 	"math/big"
 	"strings"
 )
@@ -262,7 +261,7 @@ func (gui *Gui) Transact(recipient, value, gas, gasPrice, data string) (*ethpub.
 func (gui *Gui) Create(recipient, value, gas, gasPrice, data string) (*ethpub.PReceipt, error) {
 	keyPair := ethutil.GetKeyRing().Get(0)
 
-	mainInput, initInput := mutan.PreParse(data)
+	//mainInput, initInput := mutan.PreParse(data)
 
-	return gui.pub.Create(ethutil.Hex(keyPair.PrivateKey), value, gas, gasPrice, initInput, mainInput)
+	return gui.pub.Create(ethutil.Hex(keyPair.PrivateKey), value, gas, gasPrice, data)
 }
diff --git a/ethereal/ui/ui_lib.go b/ethereal/ui/ui_lib.go
index 0c43f1675..1c88b0181 100644
--- a/ethereal/ui/ui_lib.go
+++ b/ethereal/ui/ui_lib.go
@@ -135,7 +135,7 @@ func (ui *UiLib) DebugTx(recipient, valueStr, gasStr, gasPriceStr, data string)
 	for _, str := range dis {
 		ui.win.Root().Call("setAsm", str)
 	}
-	callerTx := ethchain.NewContractCreationTx(ethutil.Big(valueStr), ethutil.Big(gasStr), ethutil.Big(gasPriceStr), callerScript, nil)
+	callerTx := ethchain.NewContractCreationTx(ethutil.Big(valueStr), ethutil.Big(gasStr), ethutil.Big(gasPriceStr), nil)
 
 	// Contract addr as test address
 	keyPair := ethutil.GetKeyRing().Get(0)
diff --git a/ethereum/config.go b/ethereum/config.go
index f25f2fb66..5da910f2b 100644
--- a/ethereum/config.go
+++ b/ethereum/config.go
@@ -6,6 +6,7 @@ import (
 	"os"
 )
 
+var Identifier string
 var StartMining bool
 var StartRpc bool
 var RpcPort int
@@ -30,6 +31,7 @@ func Init() {
 		flag.PrintDefaults()
 	}
 
+	flag.StringVar(&Identifier, "i", "", "custom client identifier")
 	flag.BoolVar(&StartMining, "m", false, "start dagger mining")
 	flag.BoolVar(&ShowGenesis, "g", false, "prints genesis header and exits")
 	flag.BoolVar(&StartRpc, "r", false, "start rpc server")
@@ -45,7 +47,6 @@ func Init() {
 	flag.StringVar(&ImportKey, "import", "", "imports the given private key (hex)")
 	flag.IntVar(&MaxPeer, "x", 10, "maximum desired peers")
 	flag.BoolVar(&StartJsConsole, "js", false, "exp")
-	//flag.StringVar(&InputFile, "e", "", "Run javascript file")
 
 	flag.Parse()
 
diff --git a/ethereum/ethereum.go b/ethereum/ethereum.go
index 2fdfd5caf..34bacb7b9 100644
--- a/ethereum/ethereum.go
+++ b/ethereum/ethereum.go
@@ -52,12 +52,15 @@ func main() {
 	var logSys *log.Logger
 	flags := log.LstdFlags
 
+	var lt ethutil.LoggerType
 	if StartJsConsole || len(InputFile) > 0 {
-		ethutil.ReadConfig(DataDir, ethutil.LogFile)
+		lt = ethutil.LogFile
 	} else {
-		ethutil.ReadConfig(DataDir, ethutil.LogFile|ethutil.LogStd)
+		lt = ethutil.LogFile | ethutil.LogStd
 	}
 
+	ethutil.ReadConfig(DataDir, lt, Identifier)
+
 	logger := ethutil.Config.Log
 
 	if LogFile != "" {
diff --git a/ethereum/javascript_runtime.go b/ethereum/javascript_runtime.go
index fa01c7005..93297f604 100644
--- a/ethereum/javascript_runtime.go
+++ b/ethereum/javascript_runtime.go
@@ -6,6 +6,7 @@ import (
 	"github.com/ethereum/eth-go/ethchain"
 	"github.com/ethereum/eth-go/ethpub"
 	"github.com/ethereum/eth-go/ethutil"
+	"github.com/ethereum/go-ethereum/utils"
 	"github.com/obscuren/otto"
 	"io/ioutil"
 	"os"
@@ -116,14 +117,26 @@ func (self *JSRE) initStdFuncs() {
 	eth.Set("watch", self.watch)
 	eth.Set("addPeer", self.addPeer)
 	eth.Set("require", self.require)
+	eth.Set("stopMining", self.stopMining)
+	eth.Set("startMining", self.startMining)
 }
 
 /*
  * The following methods are natively implemented javascript functions
  */
 
+func (self *JSRE) stopMining(call otto.FunctionCall) otto.Value {
+	v, _ := self.vm.ToValue(utils.StopMining(self.ethereum))
+	return v
+}
+
+func (self *JSRE) startMining(call otto.FunctionCall) otto.Value {
+	v, _ := self.vm.ToValue(utils.StartMining(self.ethereum))
+	return v
+}
+
 // eth.watch
-func (self JSRE) watch(call otto.FunctionCall) otto.Value {
+func (self *JSRE) watch(call otto.FunctionCall) otto.Value {
 	addr, _ := call.Argument(0).ToString()
 	var storageAddr string
 	var cb otto.Value
diff --git a/ethereum/repl.go b/ethereum/repl.go
index d1243d19c..10f51675e 100644
--- a/ethereum/repl.go
+++ b/ethereum/repl.go
@@ -48,13 +48,22 @@ func (self *JSRepl) parseInput(code string) {
 
 // The JSEthereum object attempts to wrap the PEthereum object and returns
 // meaningful javascript objects
+type JSBlock struct {
+	*ethpub.PBlock
+	eth *JSEthereum
+}
+
+func (self *JSBlock) GetTransaction(hash string) otto.Value {
+	return self.eth.toVal(self.PBlock.GetTransaction(hash))
+}
+
 type JSEthereum struct {
 	*ethpub.PEthereum
 	vm *otto.Otto
 }
 
 func (self *JSEthereum) GetBlock(hash string) otto.Value {
-	return self.toVal(self.PEthereum.GetBlock(hash))
+	return self.toVal(&JSBlock{self.PEthereum.GetBlock(hash), self})
 }
 
 func (self *JSEthereum) GetKey() otto.Value {
@@ -76,8 +85,8 @@ func (self *JSEthereum) Transact(key, recipient, valueStr, gasStr, gasPriceStr,
 	return self.toVal(r)
 }
 
-func (self *JSEthereum) Create(key, valueStr, gasStr, gasPriceStr, initStr, bodyStr string) otto.Value {
-	r, err := self.PEthereum.Create(key, valueStr, gasStr, gasPriceStr, initStr, bodyStr)
+func (self *JSEthereum) Create(key, valueStr, gasStr, gasPriceStr, scriptStr string) otto.Value {
+	r, err := self.PEthereum.Create(key, valueStr, gasStr, gasPriceStr, scriptStr)
 
 	if err != nil {
 		fmt.Println(err)
diff --git a/ethereum/repl_darwin.go b/ethereum/repl_darwin.go
index 1b98c2150..b61d4edd7 100644
--- a/ethereum/repl_darwin.go
+++ b/ethereum/repl_darwin.go
@@ -1,17 +1,42 @@
 package main
 
+// #cgo darwin CFLAGS: -I/usr/local/opt/readline/include
+// #cgo darwin LDFLAGS: -L/usr/local/opt/readline/lib
 // #cgo LDFLAGS: -lreadline
 // #include <stdio.h>
 // #include <stdlib.h>
 // #include <readline/readline.h>
 // #include <readline/history.h>
 import "C"
-
 import (
+	"os"
+	"os/signal"
 	"strings"
+	"syscall"
 	"unsafe"
 )
 
+func initReadLine() {
+	C.rl_catch_sigwinch = 0
+	C.rl_catch_signals = 0
+	c := make(chan os.Signal, 1)
+	signal.Notify(c, syscall.SIGWINCH)
+	signal.Notify(c, os.Interrupt)
+	go func() {
+		for sig := range c {
+			switch sig {
+			case syscall.SIGWINCH:
+				C.rl_resize_terminal()
+
+			case os.Interrupt:
+				C.rl_cleanup_after_signal()
+			default:
+
+			}
+		}
+	}()
+}
+
 func readLine(prompt *string) *string {
 	var p *C.char
 
@@ -59,6 +84,7 @@ func (self *JSRepl) setIndent() {
 }
 
 func (self *JSRepl) read() {
+	initReadLine()
 L:
 	for {
 		switch result := readLine(&self.prompt); true {
@@ -76,7 +102,7 @@ L:
 					break L
 				}
 
-				addHistory(str) //allow user to recall this line
+				addHistory(str[:len(str)-1]) //allow user to recall this line
 
 				self.parseInput(str)
 
diff --git a/utils/cmd.go b/utils/cmd.go
index f163575da..98005d7de 100644
--- a/utils/cmd.go
+++ b/utils/cmd.go
@@ -19,6 +19,8 @@ func DoRpc(ethereum *eth.Ethereum, RpcPort int) {
 	}
 }
 
+var miner ethminer.Miner
+
 func DoMining(ethereum *eth.Ethereum) {
 	// Set Mining status
 	ethereum.Mining = true
@@ -31,17 +33,37 @@ func DoMining(ethereum *eth.Ethereum) {
 	addr := keyPair.Address()
 
 	go func() {
+		ethutil.Config.Log.Infoln("Miner started")
+
+		miner = ethminer.NewDefaultMiner(addr, ethereum)
+
 		// Give it some time to connect with peers
 		time.Sleep(3 * time.Second)
 
-		/*
-			for ethereum.IsUpToDate() == false {
-				time.Sleep(5 * time.Second)
-			}
-		*/
-		ethutil.Config.Log.Infoln("Miner started")
-
-		miner := ethminer.NewDefaultMiner(addr, ethereum)
 		miner.Start()
 	}()
 }
+
+func StopMining(ethereum *eth.Ethereum) bool {
+	if ethereum.Mining {
+		miner.Stop()
+
+		ethutil.Config.Log.Infoln("Miner stopped")
+
+		ethereum.Mining = false
+
+		return true
+	}
+
+	return false
+}
+
+func StartMining(ethereum *eth.Ethereum) bool {
+	if !ethereum.Mining {
+		DoMining(ethereum)
+
+		return true
+	}
+
+	return false
+}