diff --git a/cmd/mist/assets/examples/bomb.html b/cmd/mist/assets/examples/bomb.html
new file mode 100644
index 0000000000000000000000000000000000000000..62540f9bb6dbe761ae185aa23d413f9af46af9ad
--- /dev/null
+++ b/cmd/mist/assets/examples/bomb.html
@@ -0,0 +1,22 @@
+<html>
+<head>
+<script src="../ext/bignumber.min.js"></script>
+<script src="../ext/ethereum.js/dist/ethereum.js"></script>
+
+<script>
+var web3 = require('web3');
+web3.setProvider(new web3.providers.HttpSyncProvider('http://localhost:8545'));
+var eth = web3.eth;
+
+function bomb() {
+    for (var i = 0; i < 200; i++) {
+        eth.transact({})
+    }
+}
+</script>
+</head>
+
+<body>
+<button onclick="bomb();">BOOM!</button>
+</body>
+</html>
diff --git a/cmd/mist/gui.go b/cmd/mist/gui.go
index 1e3efd269f96f32bd1275e5ee624d47d95140c83..afddeb8f6c2223ef9434ac3e957ee6c56badde1f 100644
--- a/cmd/mist/gui.go
+++ b/cmd/mist/gui.go
@@ -387,14 +387,11 @@ func (gui *Gui) update() {
 	generalUpdateTicker := time.NewTicker(500 * time.Millisecond)
 	statsUpdateTicker := time.NewTicker(5 * time.Second)
 
-	state := gui.eth.ChainManager().TransState()
-
-	gui.win.Root().Call("setWalletValue", fmt.Sprintf("%v", ethutil.CurrencyToString(state.GetAccount(gui.address()).Balance())))
-
 	lastBlockLabel := gui.getObjectByName("lastBlockLabel")
 	miningLabel := gui.getObjectByName("miningLabel")
 
 	events := gui.eth.EventMux().Subscribe(
+		core.ChainEvent{},
 		core.TxPreEvent{},
 		core.TxPostEvent{},
 	)
@@ -407,6 +404,8 @@ func (gui *Gui) update() {
 				return
 			}
 			switch ev := ev.(type) {
+			case core.ChainEvent:
+				gui.processBlock(ev.Block, false)
 			case core.TxPreEvent:
 				gui.insertTransaction("pre", ev.Tx)
 
@@ -422,19 +421,6 @@ func (gui *Gui) update() {
 			lastBlockLabel.Set("text", statusText)
 			miningLabel.Set("text", "Mining @ "+strconv.FormatInt(gui.uiLib.Miner().HashRate(), 10)+"/Khash")
 
-			/*
-				blockLength := gui.eth.BlockPool().BlocksProcessed
-				chainLength := gui.eth.BlockPool().ChainLength
-
-				var (
-					pct      float64 = 1.0 / float64(chainLength) * float64(blockLength)
-					dlWidget         = gui.win.Root().ObjectByName("downloadIndicator")
-					dlLabel          = gui.win.Root().ObjectByName("downloadLabel")
-				)
-				dlWidget.Set("value", pct)
-				dlLabel.Set("text", fmt.Sprintf("%d / %d", blockLength, chainLength))
-			*/
-
 		case <-statsUpdateTicker.C:
 			gui.setStatsPane()
 		}
diff --git a/core/block_processor.go b/core/block_processor.go
index b4449100f31dbd3bc5343ea8d9b49125234acae7..a9795385fb680577fb96ab73483afac56fbb4fcd 100644
--- a/core/block_processor.go
+++ b/core/block_processor.go
@@ -73,24 +73,27 @@ func (sm *BlockProcessor) TransitionState(statedb *state.StateDB, parent, block
 	return receipts, nil
 }
 
-func (self *BlockProcessor) ApplyTransaction(coinbase *state.StateObject, state *state.StateDB, block *types.Block, tx *types.Transaction, usedGas *big.Int, transientProcess bool) (*types.Receipt, *big.Int, error) {
+func (self *BlockProcessor) ApplyTransaction(coinbase *state.StateObject, statedb *state.StateDB, block *types.Block, tx *types.Transaction, usedGas *big.Int, transientProcess bool) (*types.Receipt, *big.Int, error) {
 	// If we are mining this block and validating we want to set the logs back to 0
-	state.EmptyLogs()
+	statedb.EmptyLogs()
 
 	txGas := new(big.Int).Set(tx.Gas())
 
-	cb := state.GetStateObject(coinbase.Address())
-	st := NewStateTransition(NewEnv(state, self.bc, tx, block), tx, cb)
+	cb := statedb.GetStateObject(coinbase.Address())
+	st := NewStateTransition(NewEnv(statedb, self.bc, tx, block), tx, cb)
 	_, err := st.TransitionState()
+	if err != nil && (IsNonceErr(err) || state.IsGasLimitErr(err)) {
+		return nil, nil, err
+	}
 
 	txGas.Sub(txGas, st.gas)
 
 	// Update the state with pending changes
-	state.Update(txGas)
+	statedb.Update(txGas)
 
 	cumulative := new(big.Int).Set(usedGas.Add(usedGas, txGas))
-	receipt := types.NewReceipt(state.Root(), cumulative)
-	receipt.SetLogs(state.Logs())
+	receipt := types.NewReceipt(statedb.Root(), cumulative)
+	receipt.SetLogs(statedb.Logs())
 	receipt.Bloom = types.CreateBloom(types.Receipts{receipt})
 	chainlogger.Debugln(receipt)
 
@@ -99,12 +102,12 @@ func (self *BlockProcessor) ApplyTransaction(coinbase *state.StateObject, state
 		go self.eventMux.Post(TxPostEvent{tx})
 	}
 
-	go self.eventMux.Post(state.Logs())
+	go self.eventMux.Post(statedb.Logs())
 
 	return receipt, txGas, err
 }
 
-func (self *BlockProcessor) ApplyTransactions(coinbase *state.StateObject, state *state.StateDB, block *types.Block, txs types.Transactions, transientProcess bool) (types.Receipts, types.Transactions, types.Transactions, types.Transactions, error) {
+func (self *BlockProcessor) ApplyTransactions(coinbase *state.StateObject, statedb *state.StateDB, block *types.Block, txs types.Transactions, transientProcess bool) (types.Receipts, types.Transactions, types.Transactions, types.Transactions, error) {
 	var (
 		receipts           types.Receipts
 		handled, unhandled types.Transactions
@@ -115,12 +118,12 @@ func (self *BlockProcessor) ApplyTransactions(coinbase *state.StateObject, state
 	)
 
 	for _, tx := range txs {
-		receipt, txGas, err := self.ApplyTransaction(coinbase, state, block, tx, totalUsedGas, transientProcess)
+		receipt, txGas, err := self.ApplyTransaction(coinbase, statedb, block, tx, totalUsedGas, transientProcess)
 		if err != nil {
 			switch {
 			case IsNonceErr(err):
 				return nil, nil, nil, nil, err
-			case IsGasLimitErr(err):
+			case state.IsGasLimitErr(err):
 				return nil, nil, nil, nil, err
 			default:
 				statelogger.Infoln(err)
diff --git a/core/chain_manager.go b/core/chain_manager.go
index 28628206447c57004ee3ceca50b218f0414abfcd..003781791cbf2b4e41a930c02040fd7ec14e0f6d 100644
--- a/core/chain_manager.go
+++ b/core/chain_manager.go
@@ -134,14 +134,11 @@ func (self *ChainManager) State() *state.StateDB {
 func (self *ChainManager) TransState() *state.StateDB {
 	self.tsmu.RLock()
 	defer self.tsmu.RUnlock()
-	//tmp := self.transState
 
 	return self.transState
 }
 
 func (self *ChainManager) setTransState(statedb *state.StateDB) {
-	self.tsmu.Lock()
-	defer self.tsmu.Unlock()
 	self.transState = statedb
 }
 
@@ -361,6 +358,9 @@ func (bc *ChainManager) Stop() {
 }
 
 func (self *ChainManager) InsertChain(chain types.Blocks) error {
+	self.tsmu.Lock()
+	defer self.tsmu.Unlock()
+
 	for _, block := range chain {
 		td, err := self.processor.Process(block)
 		if err != nil {
@@ -376,6 +376,7 @@ func (self *ChainManager) InsertChain(chain types.Blocks) error {
 		}
 		block.Td = td
 
+		var chain, split bool
 		self.mu.Lock()
 		{
 			self.write(block)
@@ -383,16 +384,26 @@ func (self *ChainManager) InsertChain(chain types.Blocks) error {
 			if td.Cmp(self.td) > 0 {
 				if block.Header().Number.Cmp(new(big.Int).Add(cblock.Header().Number, ethutil.Big1)) < 0 {
 					chainlogger.Infof("Split detected. New head #%v (%x) TD=%v, was #%v (%x) TD=%v\n", block.Header().Number, block.Hash()[:4], td, cblock.Header().Number, cblock.Hash()[:4], self.td)
+					split = true
 				}
 
 				self.setTotalDifficulty(td)
 				self.insert(block)
-				self.setTransState(state.New(cblock.Root(), self.db))
 
-				self.eventMux.Post(ChainEvent{block, td})
+				chain = true
 			}
 		}
 		self.mu.Unlock()
+
+		if chain {
+			//self.setTransState(state.New(block.Root(), self.db))
+			self.eventMux.Post(ChainEvent{block, td})
+		}
+
+		if split {
+			self.setTransState(state.New(block.Root(), self.db))
+			self.eventMux.Post(ChainSplitEvent{block})
+		}
 	}
 
 	return nil
@@ -402,3 +413,7 @@ func (self *ChainManager) InsertChain(chain types.Blocks) error {
 func (self *ChainManager) GetAccount(addr []byte) *state.StateObject {
 	return self.State().GetAccount(addr)
 }
+
+func (self *ChainManager) TransMut() *sync.RWMutex {
+	return &self.tsmu
+}
diff --git a/core/error.go b/core/error.go
index 6af48ac2de9638ae9d683b5fa91245e7f6989ff8..e86bacb2d360fd7d0a0932e571926468a1aebb95 100644
--- a/core/error.go
+++ b/core/error.go
@@ -68,23 +68,6 @@ func IsValidationErr(err error) bool {
 	return ok
 }
 
-type GasLimitErr struct {
-	Message string
-	Is, Max *big.Int
-}
-
-func IsGasLimitErr(err error) bool {
-	_, ok := err.(*GasLimitErr)
-
-	return ok
-}
-func (err *GasLimitErr) Error() string {
-	return err.Message
-}
-func GasLimitError(is, max *big.Int) *GasLimitErr {
-	return &GasLimitErr{Message: fmt.Sprintf("GasLimit error. Max %s, transaction would take it to %s", max, is), Is: is, Max: max}
-}
-
 type NonceErr struct {
 	Message string
 	Is, Exp uint64
diff --git a/core/events.go b/core/events.go
index fe106da4965b9228ac80fb84084098ab4ee511e9..4cbbc609ca4231a55eeca750d5a618a7a5ff47fd 100644
--- a/core/events.go
+++ b/core/events.go
@@ -13,3 +13,6 @@ type NewBlockEvent struct{ Block *types.Block }
 
 // NewMinedBlockEvent is posted when a block has been imported.
 type NewMinedBlockEvent struct{ Block *types.Block }
+
+// ChainSplit is posted when a new head is detected
+type ChainSplitEvent struct{ Block *types.Block }
diff --git a/core/state_transition.go b/core/state_transition.go
index 33dd45f023786370f8ac67e01ad9ed1e36a39e11..e82be647dbf0fe059be23ef79d394f97c7261f27 100644
--- a/core/state_transition.go
+++ b/core/state_transition.go
@@ -166,7 +166,8 @@ func (self *StateTransition) TransitionState() (ret []byte, err error) {
 	defer self.RefundGas()
 
 	// Increment the nonce for the next transaction
-	sender.Nonce += 1
+	self.state.SetNonce(sender.Address(), sender.Nonce+1)
+	//sender.Nonce += 1
 
 	// Transaction gas
 	if err = self.UseGas(vm.GasTx); err != nil {
diff --git a/core/transaction_pool.go b/core/transaction_pool.go
index 7a901fcae5c6baecead24642b109e79ff2ec365b..894b6c440c42e692cbc1a82fc9cca7b3a4283d55 100644
--- a/core/transaction_pool.go
+++ b/core/transaction_pool.go
@@ -3,6 +3,7 @@ package core
 import (
 	"errors"
 	"fmt"
+	"sync"
 
 	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/ethutil"
@@ -35,6 +36,7 @@ type TxProcessor interface {
 // guarantee a non blocking pool we use a queue channel which can be
 // independently read without needing access to the actual pool.
 type TxPool struct {
+	mu sync.RWMutex
 	// Queueing channel for reading and writing incoming
 	// transactions to
 	queueChan chan *types.Transaction
@@ -97,7 +99,7 @@ func (self *TxPool) addTx(tx *types.Transaction) {
 	self.txs[string(tx.Hash())] = tx
 }
 
-func (self *TxPool) Add(tx *types.Transaction) error {
+func (self *TxPool) add(tx *types.Transaction) error {
 	if self.txs[string(tx.Hash())] != nil {
 		return fmt.Errorf("Known transaction (%x)", tx.Hash()[0:4])
 	}
@@ -128,17 +130,28 @@ func (self *TxPool) Size() int {
 	return len(self.txs)
 }
 
+func (self *TxPool) Add(tx *types.Transaction) error {
+	self.mu.Lock()
+	defer self.mu.Unlock()
+	return self.add(tx)
+}
 func (self *TxPool) AddTransactions(txs []*types.Transaction) {
+	self.mu.Lock()
+	defer self.mu.Unlock()
+
 	for _, tx := range txs {
-		if err := self.Add(tx); err != nil {
-			txplogger.Infoln(err)
+		if err := self.add(tx); err != nil {
+			txplogger.Debugln(err)
 		} else {
-			txplogger.Infof("tx %x\n", tx.Hash()[0:4])
+			txplogger.Debugf("tx %x\n", tx.Hash()[0:4])
 		}
 	}
 }
 
 func (self *TxPool) GetTransactions() (txs types.Transactions) {
+	self.mu.RLock()
+	defer self.mu.RUnlock()
+
 	txs = make(types.Transactions, self.Size())
 	i := 0
 	for _, tx := range self.txs {
@@ -150,30 +163,32 @@ func (self *TxPool) GetTransactions() (txs types.Transactions) {
 }
 
 func (pool *TxPool) RemoveInvalid(query StateQuery) {
+	pool.mu.Lock()
+
 	var removedTxs types.Transactions
 	for _, tx := range pool.txs {
 		sender := query.GetAccount(tx.From())
 		err := pool.ValidateTransaction(tx)
-		fmt.Println(err, sender.Nonce, tx.Nonce())
 		if err != nil || sender.Nonce >= tx.Nonce() {
 			removedTxs = append(removedTxs, tx)
 		}
 	}
+	pool.mu.Unlock()
 
 	pool.RemoveSet(removedTxs)
 }
 
 func (self *TxPool) RemoveSet(txs types.Transactions) {
+	self.mu.Lock()
+	defer self.mu.Unlock()
+
 	for _, tx := range txs {
 		delete(self.txs, string(tx.Hash()))
 	}
 }
 
-func (pool *TxPool) Flush() []*types.Transaction {
-	txList := pool.GetTransactions()
+func (pool *TxPool) Flush() {
 	pool.txs = make(map[string]*types.Transaction)
-
-	return txList
 }
 
 func (pool *TxPool) Start() {
diff --git a/ethutil/common.go b/ethutil/common.go
index 271c56fd547164bf50a3d6c69ea0e4e175352b1d..2ef2440c78c8ec34ab2da454ec9265ea433f0f26 100644
--- a/ethutil/common.go
+++ b/ethutil/common.go
@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"math/big"
 	"runtime"
+	"time"
 )
 
 func IsWindows() bool {
@@ -86,3 +87,9 @@ var (
 	Big256   = big.NewInt(0xff)
 	Big257   = big.NewInt(257)
 )
+
+func Bench(pre string, cb func()) {
+	start := time.Now()
+	cb()
+	fmt.Println(pre, ": took:", time.Since(start))
+}
diff --git a/miner/worker.go b/miner/worker.go
index 47b462e537f8183648428eef4e0cd89348671e85..1f3a52ab52838ba9b498ff7f631228888be5ac08 100644
--- a/miner/worker.go
+++ b/miner/worker.go
@@ -109,14 +109,18 @@ func (self *worker) register(agent Agent) {
 }
 
 func (self *worker) update() {
-	events := self.mux.Subscribe(core.ChainEvent{}, core.TxPreEvent{})
+	events := self.mux.Subscribe(core.ChainEvent{}, core.NewMinedBlockEvent{})
 
 out:
 	for {
 		select {
 		case event := <-events.Chan():
-			switch event.(type) {
-			case core.ChainEvent, core.TxPreEvent:
+			switch ev := event.(type) {
+			case core.ChainEvent:
+				if self.current.block != ev.Block {
+					self.commitNewWork()
+				}
+			case core.NewMinedBlockEvent:
 				self.commitNewWork()
 			}
 		case <-self.quit:
@@ -172,17 +176,19 @@ func (self *worker) commitNewWork() {
 	transactions := self.eth.TxPool().GetTransactions()
 	sort.Sort(types.TxByNonce{transactions})
 
+	minerlogger.Infof("committing new work with %d txs\n", len(transactions))
 	// Keep track of transactions which return errors so they can be removed
 	var remove types.Transactions
+gasLimit:
 	for _, tx := range transactions {
 		err := self.commitTransaction(tx)
 		switch {
 		case core.IsNonceErr(err):
 			// Remove invalid transactions
 			remove = append(remove, tx)
-		case core.IsGasLimitErr(err):
+		case state.IsGasLimitErr(err):
 			// Break on gas limit
-			break
+			break gasLimit
 		}
 
 		if err != nil {
@@ -227,11 +233,9 @@ func (self *worker) commitUncle(uncle *types.Header) error {
 }
 
 func (self *worker) commitTransaction(tx *types.Transaction) error {
-	snapshot := self.current.state.Copy()
+	//fmt.Printf("proc %x %v\n", tx.Hash()[:3], tx.Nonce())
 	receipt, _, err := self.proc.ApplyTransaction(self.current.coinbase, self.current.state, self.current.block, tx, self.current.totalUsedGas, true)
-	if err != nil && (core.IsNonceErr(err) || core.IsGasLimitErr(err)) {
-		self.current.state.Set(snapshot)
-
+	if err != nil && (core.IsNonceErr(err) || state.IsGasLimitErr(err)) {
 		return err
 	}
 
diff --git a/pow/ezp/pow.go b/pow/ezp/pow.go
index 540381243fb761be11c5028e349c46f42b3bfb71..f4a8b80e5eeebc33232ef8eb2804c0a1e26610b7 100644
--- a/pow/ezp/pow.go
+++ b/pow/ezp/pow.go
@@ -21,7 +21,7 @@ type EasyPow struct {
 }
 
 func New() *EasyPow {
-	return &EasyPow{turbo: false}
+	return &EasyPow{turbo: true}
 }
 
 func (pow *EasyPow) GetHashrate() int64 {
diff --git a/rpc/packages.go b/rpc/packages.go
index 7044d9d12780de074e2d1afa302e4e711f116a1a..63eea54d6d1c27a8f18188d4f69f18887cabc9f8 100644
--- a/rpc/packages.go
+++ b/rpc/packages.go
@@ -180,6 +180,7 @@ func (p *EthereumApi) Transact(args *NewTxArgs, reply *interface{}) error {
 		result, _ := p.xeth.Transact( /* TODO specify account */ args.To, args.Value, args.Gas, args.GasPrice, args.Data)
 		*reply = result
 	}
+
 	return nil
 }
 
diff --git a/state/state_object.go b/state/state_object.go
index eaa91c7133b510eb20596bc1e9f94379c2634317..d50c9fd7a92281ddf34f82f2a8302e77f0d00ec3 100644
--- a/state/state_object.go
+++ b/state/state_object.go
@@ -53,6 +53,7 @@ type StateObject struct {
 	// When an object is marked for deletion it will be delete from the trie
 	// during the "update" phase of the state transition
 	remove bool
+	dirty  bool
 }
 
 func (self *StateObject) Reset() {
@@ -211,6 +212,8 @@ func (self *StateObject) BuyGas(gas, price *big.Int) error {
 		return GasLimitError(self.gasPool, gas)
 	}
 
+	self.gasPool.Sub(self.gasPool, gas)
+
 	rGas := new(big.Int).Set(gas)
 	rGas.Mul(rGas, price)
 
@@ -241,6 +244,7 @@ func (self *StateObject) Copy() *StateObject {
 	stateObject.storage = self.storage.Copy()
 	stateObject.gasPool.Set(self.gasPool)
 	stateObject.remove = self.remove
+	stateObject.dirty = self.dirty
 
 	return stateObject
 }
diff --git a/state/statedb.go b/state/statedb.go
index c83d59ed772a73871c69ea5068d13ab5d11c72c8..8c8a21db99bdd4b0d390b306022f9b6a94c3ca72 100644
--- a/state/statedb.go
+++ b/state/statedb.go
@@ -78,43 +78,45 @@ func (self *StateDB) GetNonce(addr []byte) uint64 {
 	return 0
 }
 
-func (self *StateDB) SetNonce(addr []byte, nonce uint64) {
+func (self *StateDB) GetCode(addr []byte) []byte {
 	stateObject := self.GetStateObject(addr)
 	if stateObject != nil {
-		stateObject.Nonce = nonce
+		return stateObject.Code
 	}
+
+	return nil
 }
 
-func (self *StateDB) GetCode(addr []byte) []byte {
-	stateObject := self.GetStateObject(addr)
+func (self *StateDB) GetState(a, b []byte) []byte {
+	stateObject := self.GetStateObject(a)
 	if stateObject != nil {
-		return stateObject.Code
+		return stateObject.GetState(b).Bytes()
 	}
 
 	return nil
 }
 
-func (self *StateDB) SetCode(addr, code []byte) {
+func (self *StateDB) SetNonce(addr []byte, nonce uint64) {
 	stateObject := self.GetStateObject(addr)
 	if stateObject != nil {
-		stateObject.SetCode(code)
+		stateObject.Nonce = nonce
+		stateObject.dirty = true
 	}
 }
 
-// TODO vars
-func (self *StateDB) GetState(a, b []byte) []byte {
-	stateObject := self.GetStateObject(a)
+func (self *StateDB) SetCode(addr, code []byte) {
+	stateObject := self.GetStateObject(addr)
 	if stateObject != nil {
-		return stateObject.GetState(b).Bytes()
+		stateObject.SetCode(code)
+		stateObject.dirty = true
 	}
-
-	return nil
 }
 
 func (self *StateDB) SetState(addr, key []byte, value interface{}) {
 	stateObject := self.GetStateObject(addr)
 	if stateObject != nil {
 		stateObject.SetState(key, ethutil.NewValue(value))
+		stateObject.dirty = true
 	}
 }
 
@@ -122,6 +124,7 @@ func (self *StateDB) Delete(addr []byte) bool {
 	stateObject := self.GetStateObject(addr)
 	if stateObject != nil {
 		stateObject.MarkForDeletion()
+		stateObject.dirty = true
 
 		return true
 	}
@@ -282,16 +285,18 @@ func (self *StateDB) Refunds() map[string]*big.Int {
 }
 
 func (self *StateDB) Update(gasUsed *big.Int) {
-
 	self.refund = make(map[string]*big.Int)
 
 	for _, stateObject := range self.stateObjects {
-		if stateObject.remove {
-			self.DeleteStateObject(stateObject)
-		} else {
-			stateObject.Sync()
-
-			self.UpdateStateObject(stateObject)
+		if stateObject.dirty {
+			if stateObject.remove {
+				self.DeleteStateObject(stateObject)
+			} else {
+				stateObject.Sync()
+
+				self.UpdateStateObject(stateObject)
+			}
+			stateObject.dirty = false
 		}
 	}
 }
diff --git a/xeth/xeth.go b/xeth/xeth.go
index f005105bb285f5e8a98807bae92f66e55aa69136..d578c03c9ffe88e8a899b3a5d337544546bd5853 100644
--- a/xeth/xeth.go
+++ b/xeth/xeth.go
@@ -7,6 +7,7 @@ package xeth
 import (
 	"bytes"
 	"encoding/json"
+	"fmt"
 
 	"github.com/ethereum/go-ethereum/core"
 	"github.com/ethereum/go-ethereum/core/types"
@@ -241,7 +242,6 @@ func (self *XEth) Call(toStr, valueStr, gasStr, gasPriceStr, dataStr string) (st
 }
 
 func (self *XEth) Transact(toStr, valueStr, gasStr, gasPriceStr, codeStr string) (string, error) {
-
 	var (
 		to               []byte
 		value            = ethutil.NewValue(valueStr)
@@ -265,29 +265,32 @@ func (self *XEth) Transact(toStr, valueStr, gasStr, gasPriceStr, codeStr string)
 		tx = types.NewTransactionMessage(to, value.BigInt(), gas.BigInt(), price.BigInt(), data)
 	}
 
-	state := self.chainManager.TransState()
+	var err error
+	state := self.eth.ChainManager().TransState()
+	if balance := state.GetBalance(key.Address()); balance.Cmp(tx.Value()) < 0 {
+		return "", fmt.Errorf("insufficient balance. balance=%v tx=%v", balance, tx.Value())
+	}
 	nonce := state.GetNonce(key.Address())
 
 	tx.SetNonce(nonce)
 	tx.Sign(key.PrivateKey)
 
-	// Do some pre processing for our "pre" events  and hooks
-	block := self.chainManager.NewBlock(key.Address())
-	coinbase := state.GetOrNewStateObject(key.Address())
-	coinbase.SetGasPool(block.GasLimit())
-	self.blockProcessor.ApplyTransactions(coinbase, state, block, types.Transactions{tx}, true)
+	//fmt.Printf("create tx: %x %v\n", tx.Hash()[:4], tx.Nonce())
 
-	err := self.eth.TxPool().Add(tx)
+	/*
+		// Do some pre processing for our "pre" events  and hooks
+		block := self.chainManager.NewBlock(key.Address())
+		coinbase := state.GetOrNewStateObject(key.Address())
+		coinbase.SetGasPool(block.GasLimit())
+		self.blockProcessor.ApplyTransactions(coinbase, state, block, types.Transactions{tx}, true)
+	*/
+
+	err = self.eth.TxPool().Add(tx)
 	if err != nil {
 		return "", err
 	}
 	state.SetNonce(key.Address(), nonce+1)
 
-	if contractCreation {
-		addr := core.AddressFromMessage(tx)
-		pipelogger.Infof("Contract addr %x\n", addr)
-	}
-
 	if types.IsContractAddr(to) {
 		return toHex(core.AddressFromMessage(tx)), nil
 	}