Merge branch 'feature/refactor_vm' into develop

27 files changed, 926 insertions, 532 deletions

diff --git a/README.md b/README.md
index 69c6eb0ad..5b0f6e07f 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@ Ethereum
 Ethereum Go Development package (C) Jeffrey Wilcke
 
 Ethereum is currently in its testing phase. The current state is "Proof
-of Concept 0.5.20". For build instructions see the [Wiki](https://github.com/ethereum/go-ethereum/wiki/Building-Ethereum(Go)).
+of Concept 0.6.0". For build instructions see the [Wiki](https://github.com/ethereum/go-ethereum/wiki/Building-Ethereum(Go)).
 
 Ethereum Go is split up in several sub packages Please refer to each
 individual package for more information.
diff --git a/ethchain/asm.go b/ethchain/asm.go
index 2697953fd..9f99b0c48 100644
--- a/ethchain/asm.go
+++ b/ethchain/asm.go
@@ -25,7 +25,7 @@ func Disassemble(script []byte) (asm []string) {
 			pc.Add(pc, ethutil.Big1)
 			a := int64(op) - int64(PUSH1) + 1
 			if int(pc.Int64()+a) > len(script) {
-				return nil
+				return
 			}
 
 			data := script[pc.Int64() : pc.Int64()+a]
@@ -40,5 +40,5 @@ func Disassemble(script []byte) (asm []string) {
 		pc.Add(pc, ethutil.Big1)
 	}
 
-	return
+	return asm
 }
diff --git a/ethchain/block.go b/ethchain/block.go
index 447d55f99..437525e35 100644
--- a/ethchain/block.go
+++ b/ethchain/block.go
@@ -4,6 +4,7 @@ import (
 	"bytes"
 	"fmt"
 	"github.com/ethereum/eth-go/ethcrypto"
+	"github.com/ethereum/eth-go/ethstate"
 	"github.com/ethereum/eth-go/ethtrie"
 	"github.com/ethereum/eth-go/ethutil"
 	"math/big"
@@ -39,7 +40,7 @@ type Block struct {
 	Coinbase []byte
 	// Block Trie state
 	//state *ethutil.Trie
-	state *State
+	state *ethstate.State
 	// Difficulty for the current block
 	Difficulty *big.Int
 	// Creation time
@@ -104,7 +105,7 @@ func CreateBlock(root interface{},
 	}
 	block.SetUncles([]*Block{})
 
-	block.state = NewState(ethtrie.NewTrie(ethutil.Config.Db, root))
+	block.state = ethstate.NewState(ethtrie.NewTrie(ethutil.Config.Db, root))
 
 	return block
 }
@@ -116,12 +117,12 @@ func (block *Block) Hash() []byte {
 
 func (block *Block) HashNoNonce() []byte {
 	return ethcrypto.Sha3Bin(ethutil.Encode([]interface{}{block.PrevHash,
-		block.UncleSha, block.Coinbase, block.state.trie.Root,
+		block.UncleSha, block.Coinbase, block.state.Trie.Root,
 		block.TxSha, block.Difficulty, block.Number, block.MinGasPrice,
 		block.GasLimit, block.GasUsed, block.Time, block.Extra}))
 }
 
-func (block *Block) State() *State {
+func (block *Block) State() *ethstate.State {
 	return block.state
 }
 
@@ -140,17 +141,17 @@ func (block *Block) PayFee(addr []byte, fee *big.Int) bool {
 
 	base := new(big.Int)
 	contract.Amount = base.Sub(contract.Amount, fee)
-	block.state.trie.Update(string(addr), string(contract.RlpEncode()))
+	block.state.Trie.Update(string(addr), string(contract.RlpEncode()))
 
-	data := block.state.trie.Get(string(block.Coinbase))
+	data := block.state.Trie.Get(string(block.Coinbase))
 
 	// Get the ether (Coinbase) and add the fee (gief fee to miner)
-	account := NewStateObjectFromBytes(block.Coinbase, []byte(data))
+	account := ethstate.NewStateObjectFromBytes(block.Coinbase, []byte(data))
 
 	base = new(big.Int)
 	account.Amount = base.Add(account.Amount, fee)
 
-	//block.state.trie.Update(string(block.Coinbase), string(ether.RlpEncode()))
+	//block.state.Trie.Update(string(block.Coinbase), string(ether.RlpEncode()))
 	block.state.UpdateStateObject(account)
 
 	return true
@@ -312,7 +313,7 @@ func (block *Block) RlpValueDecode(decoder *ethutil.Value) {
 	block.PrevHash = header.Get(0).Bytes()
 	block.UncleSha = header.Get(1).Bytes()
 	block.Coinbase = header.Get(2).Bytes()
-	block.state = NewState(ethtrie.NewTrie(ethutil.Config.Db, header.Get(3).Val))
+	block.state = ethstate.NewState(ethtrie.NewTrie(ethutil.Config.Db, header.Get(3).Val))
 	block.TxSha = header.Get(4).Bytes()
 	block.Difficulty = header.Get(5).BigInt()
 	block.Number = header.Get(6).BigInt()
@@ -354,7 +355,7 @@ func NewUncleBlockFromValue(header *ethutil.Value) *Block {
 	block.PrevHash = header.Get(0).Bytes()
 	block.UncleSha = header.Get(1).Bytes()
 	block.Coinbase = header.Get(2).Bytes()
-	block.state = NewState(ethtrie.NewTrie(ethutil.Config.Db, header.Get(3).Val))
+	block.state = ethstate.NewState(ethtrie.NewTrie(ethutil.Config.Db, header.Get(3).Val))
 	block.TxSha = header.Get(4).Bytes()
 	block.Difficulty = header.Get(5).BigInt()
 	block.Number = header.Get(6).BigInt()
@@ -369,7 +370,7 @@ func NewUncleBlockFromValue(header *ethutil.Value) *Block {
 }
 
 func (block *Block) GetRoot() interface{} {
-	return block.state.trie.Root
+	return block.state.Trie.Root
 }
 
 func (self *Block) Receipts() []*Receipt {
@@ -385,7 +386,7 @@ func (block *Block) header() []interface{} {
 		// Coinbase address
 		block.Coinbase,
 		// root state
-		block.state.trie.Root,
+		block.state.Trie.Root,
 		// Sha of tx
 		block.TxSha,
 		// Current block Difficulty
@@ -429,7 +430,7 @@ func (block *Block) String() string {
 		block.PrevHash,
 		block.UncleSha,
 		block.Coinbase,
-		block.state.trie.Root,
+		block.state.Trie.Root,
 		block.TxSha,
 		block.Difficulty,
 		block.Number,
diff --git a/ethchain/block_chain.go b/ethchain/block_chain.go
index f72a77706..1a2662787 100644
--- a/ethchain/block_chain.go
+++ b/ethchain/block_chain.go
@@ -44,7 +44,7 @@ func (bc *BlockChain) NewBlock(coinbase []byte) *Block {
 	hash := ZeroHash256
 
 	if bc.CurrentBlock != nil {
-		root = bc.CurrentBlock.state.trie.Root
+		root = bc.CurrentBlock.state.Trie.Root
 		hash = bc.LastBlockHash
 		lastBlockTime = bc.CurrentBlock.Time
 	}
@@ -297,7 +297,7 @@ func (bc *BlockChain) setLastBlock() {
 	} else {
 		AddTestNetFunds(bc.genesisBlock)
 
-		bc.genesisBlock.state.trie.Sync()
+		bc.genesisBlock.state.Trie.Sync()
 		// Prepare the genesis block
 		bc.Add(bc.genesisBlock)
 
diff --git a/ethchain/state_manager.go b/ethchain/state_manager.go
index 6a6c67492..9408cf331 100644
--- a/ethchain/state_manager.go
+++ b/ethchain/state_manager.go
@@ -6,7 +6,7 @@ import (
 	"fmt"
 	"github.com/ethereum/eth-go/ethcrypto"
 	"github.com/ethereum/eth-go/ethlog"
-	_ "github.com/ethereum/eth-go/ethtrie"
+	"github.com/ethereum/eth-go/ethstate"
 	"github.com/ethereum/eth-go/ethutil"
 	"github.com/ethereum/eth-go/ethwire"
 	"math/big"
@@ -50,8 +50,6 @@ type StateManager struct {
 	mutex sync.Mutex
 	// Canonical block chain
 	bc *BlockChain
-	// Stack for processing contracts
-	stack *Stack
 	// non-persistent key/value memory storage
 	mem map[string]*big.Int
 	// Proof of work used for validating
@@ -62,10 +60,10 @@ type StateManager struct {
 	// Transiently state. The trans state isn't ever saved, validated and
 	// it could be used for setting account nonces without effecting
 	// the main states.
-	transState *State
+	transState *ethstate.State
 	// Mining state. The mining state is used purely and solely by the mining
 	// operation.
-	miningState *State
+	miningState *ethstate.State
 
 	// The last attempted block is mainly used for debugging purposes
 	// This does not have to be a valid block and will be set during
@@ -75,7 +73,6 @@ type StateManager struct {
 
 func NewStateManager(ethereum EthManager) *StateManager {
 	sm := &StateManager{
-		stack:    NewStack(),
 		mem:      make(map[string]*big.Int),
 		Pow:      &EasyPow{},
 		Ethereum: ethereum,
@@ -87,19 +84,19 @@ func NewStateManager(ethereum EthManager) *StateManager {
 	return sm
 }
 
-func (sm *StateManager) CurrentState() *State {
+func (sm *StateManager) CurrentState() *ethstate.State {
 	return sm.Ethereum.BlockChain().CurrentBlock.State()
 }
 
-func (sm *StateManager) TransState() *State {
+func (sm *StateManager) TransState() *ethstate.State {
 	return sm.transState
 }
 
-func (sm *StateManager) MiningState() *State {
+func (sm *StateManager) MiningState() *ethstate.State {
 	return sm.miningState
 }
 
-func (sm *StateManager) NewMiningState() *State {
+func (sm *StateManager) NewMiningState() *ethstate.State {
 	sm.miningState = sm.Ethereum.BlockChain().CurrentBlock.State().Copy()
 
 	return sm.miningState
@@ -109,7 +106,7 @@ func (sm *StateManager) BlockChain() *BlockChain {
 	return sm.bc
 }
 
-func (self *StateManager) ProcessTransactions(coinbase *StateObject, state *State, block, parent *Block, txs Transactions) (Receipts, Transactions, Transactions, error) {
+func (self *StateManager) ProcessTransactions(coinbase *ethstate.StateObject, state *ethstate.State, block, parent *Block, txs Transactions) (Receipts, Transactions, Transactions, error) {
 	var (
 		receipts           Receipts
 		handled, unhandled Transactions
@@ -123,9 +120,9 @@ done:
 
 		cb := state.GetStateObject(coinbase.Address())
 		st := NewStateTransition(cb, tx, state, block)
-		//fmt.Printf("#%d\n", i+1)
 		err = st.TransitionState()
 		if err != nil {
+			statelogger.Infoln(err)
 			switch {
 			case IsNonceErr(err):
 				err = nil // ignore error
@@ -225,7 +222,7 @@ func (sm *StateManager) Process(block *Block, dontReact bool) (err error) {
 	}
 
 	if !block.State().Cmp(state) {
-		err = fmt.Errorf("Invalid merkle root.\nrec: %x\nis:  %x", block.State().trie.Root, state.trie.Root)
+		err = fmt.Errorf("Invalid merkle root.\nrec: %x\nis:  %x", block.State().Trie.Root, state.Trie.Root)
 		return
 	}
 
@@ -242,7 +239,7 @@ func (sm *StateManager) Process(block *Block, dontReact bool) (err error) {
 		if dontReact == false {
 			sm.Ethereum.Reactor().Post("newBlock", block)
 
-			state.manifest.Reset()
+			state.Manifest().Reset()
 		}
 
 		sm.Ethereum.Broadcast(ethwire.MsgBlockTy, []interface{}{block.Value().Val})
@@ -255,7 +252,7 @@ func (sm *StateManager) Process(block *Block, dontReact bool) (err error) {
 	return nil
 }
 
-func (sm *StateManager) ApplyDiff(state *State, parent, block *Block) (receipts Receipts, err error) {
+func (sm *StateManager) ApplyDiff(state *ethstate.State, parent, block *Block) (receipts Receipts, err error) {
 	coinbase := state.GetOrNewStateObject(block.Coinbase)
 	coinbase.SetGasPool(block.CalcGasLimit(parent))
 
@@ -340,7 +337,7 @@ func CalculateUncleReward(block *Block) *big.Int {
 	return UncleReward
 }
 
-func (sm *StateManager) AccumelateRewards(state *State, block *Block) error {
+func (sm *StateManager) AccumelateRewards(state *ethstate.State, block *Block) error {
 	// Get the account associated with the coinbase
 	account := state.GetAccount(block.Coinbase)
 	// Reward amount of ether to the coinbase address
@@ -364,14 +361,14 @@ func (sm *StateManager) Stop() {
 	sm.bc.Stop()
 }
 
-func (sm *StateManager) notifyChanges(state *State) {
-	for addr, stateObject := range state.manifest.objectChanges {
+func (sm *StateManager) notifyChanges(state *ethstate.State) {
+	for addr, stateObject := range state.Manifest().ObjectChanges {
 		sm.Ethereum.Reactor().Post("object:"+addr, stateObject)
 	}
 
-	for stateObjectAddr, mappedObjects := range state.manifest.storageChanges {
+	for stateObjectAddr, mappedObjects := range state.Manifest().StorageChanges {
 		for addr, value := range mappedObjects {
-			sm.Ethereum.Reactor().Post("storage:"+stateObjectAddr+":"+addr, &StorageState{[]byte(stateObjectAddr), []byte(addr), value})
+			sm.Ethereum.Reactor().Post("storage:"+stateObjectAddr+":"+addr, &ethstate.StorageState{[]byte(stateObjectAddr), []byte(addr), value})
 		}
 	}
 }
diff --git a/ethchain/state_object_test.go b/ethchain/state_object_test.go
deleted file mode 100644
index 2588100d0..000000000
--- a/ethchain/state_object_test.go
+++ /dev/null
@@ -1,52 +0,0 @@
-package ethchain
-
-import (
-	"fmt"
-	"github.com/ethereum/eth-go/ethdb"
-	"github.com/ethereum/eth-go/ethutil"
-	"math/big"
-	"testing"
-)
-
-func TestSync(t *testing.T) {
-	ethutil.ReadConfig(".ethtest", "/tmp/ethtest", "", "ETH")
-
-	db, _ := ethdb.NewMemDatabase()
-	state := NewState(ethutil.NewTrie(db, ""))
-
-	contract := NewContract([]byte("aa"), ethutil.Big1, ZeroHash256)
-
-	contract.script = []byte{42}
-
-	state.UpdateStateObject(contract)
-	state.Sync()
-
-	object := state.GetStateObject([]byte("aa"))
-	if len(object.Script()) == 0 {
-		t.Fail()
-	}
-}
-
-func TestObjectGet(t *testing.T) {
-	ethutil.ReadConfig(".ethtest", "/tmp/ethtest", "", "ETH")
-
-	db, _ := ethdb.NewMemDatabase()
-	ethutil.Config.Db = db
-
-	state := NewState(ethutil.NewTrie(db, ""))
-
-	contract := NewContract([]byte("aa"), ethutil.Big1, ZeroHash256)
-	state.UpdateStateObject(contract)
-
-	contract = state.GetStateObject([]byte("aa"))
-	contract.SetStorage(big.NewInt(0), ethutil.NewValue("hello"))
-	o := contract.GetMem(big.NewInt(0))
-	fmt.Println(o)
-
-	state.UpdateStateObject(contract)
-	contract.SetStorage(big.NewInt(0), ethutil.NewValue("hello00"))
-
-	contract = state.GetStateObject([]byte("aa"))
-	o = contract.GetMem(big.NewInt(0))
-	fmt.Println("after", o)
-}
diff --git a/ethchain/state_transition.go b/ethchain/state_transition.go
index 8ed528c9f..266328ce8 100644
--- a/ethchain/state_transition.go
+++ b/ethchain/state_transition.go
@@ -2,6 +2,10 @@ package ethchain
 
 import (
 	"fmt"
+	"github.com/ethereum/eth-go/ethstate"
+	"github.com/ethereum/eth-go/ethtrie"
+	"github.com/ethereum/eth-go/ethutil"
+	"github.com/ethereum/eth-go/ethvm"
 	"math/big"
 )
 
@@ -27,17 +31,17 @@ type StateTransition struct {
 	gas, gasPrice      *big.Int
 	value              *big.Int
 	data               []byte
-	state              *State
+	state              *ethstate.State
 	block              *Block
 
-	cb, rec, sen *StateObject
+	cb, rec, sen *ethstate.StateObject
 }
 
-func NewStateTransition(coinbase *StateObject, tx *Transaction, state *State, block *Block) *StateTransition {
+func NewStateTransition(coinbase *ethstate.StateObject, tx *Transaction, state *ethstate.State, block *Block) *StateTransition {
 	return &StateTransition{coinbase.Address(), tx.Recipient, tx, new(big.Int), new(big.Int).Set(tx.GasPrice), tx.Value, tx.Data, state, block, coinbase, nil, nil}
 }
 
-func (self *StateTransition) Coinbase() *StateObject {
+func (self *StateTransition) Coinbase() *ethstate.StateObject {
 	if self.cb != nil {
 		return self.cb
 	}
@@ -45,7 +49,7 @@ func (self *StateTransition) Coinbase() *StateObject {
 	self.cb = self.state.GetOrNewStateObject(self.coinbase)
 	return self.cb
 }
-func (self *StateTransition) Sender() *StateObject {
+func (self *StateTransition) Sender() *ethstate.StateObject {
 	if self.sen != nil {
 		return self.sen
 	}
@@ -54,7 +58,7 @@ func (self *StateTransition) Sender() *StateObject {
 
 	return self.sen
 }
-func (self *StateTransition) Receiver() *StateObject {
+func (self *StateTransition) Receiver() *ethstate.StateObject {
 	if self.tx != nil && self.tx.CreatesContract() {
 		return nil
 	}
@@ -67,7 +71,7 @@ func (self *StateTransition) Receiver() *StateObject {
 	return self.rec
 }
 
-func (self *StateTransition) MakeStateObject(state *State, tx *Transaction) *StateObject {
+func (self *StateTransition) MakeStateObject(state *ethstate.State, tx *Transaction) *ethstate.StateObject {
 	contract := MakeContract(tx, state)
 
 	return contract
@@ -154,7 +158,7 @@ func (self *StateTransition) TransitionState() (err error) {
 	var (
 		tx       = self.tx
 		sender   = self.Sender()
-		receiver *StateObject
+		receiver *ethstate.StateObject
 	)
 
 	defer self.RefundGas()
@@ -163,13 +167,13 @@ func (self *StateTransition) TransitionState() (err error) {
 	sender.Nonce += 1
 
 	// Transaction gas
-	if err = self.UseGas(GasTx); err != nil {
+	if err = self.UseGas(ethvm.GasTx); err != nil {
 		return
 	}
 
 	// Pay data gas
 	dataPrice := big.NewInt(int64(len(self.data)))
-	dataPrice.Mul(dataPrice, GasData)
+	dataPrice.Mul(dataPrice, ethvm.GasData)
 	if err = self.UseGas(dataPrice); err != nil {
 		return
 	}
@@ -178,7 +182,7 @@ func (self *StateTransition) TransitionState() (err error) {
 		return fmt.Errorf("Insufficient funds to transfer value. Req %v, has %v", self.value, sender.Amount)
 	}
 
-	var snapshot *State
+	var snapshot *ethstate.State
 	// If the receiver is nil it's a contract (\0*32).
 	if tx.CreatesContract() {
 		// Subtract the (irreversible) amount from the senders account
@@ -220,10 +224,10 @@ func (self *StateTransition) TransitionState() (err error) {
 			return fmt.Errorf("Error during init execution %v", err)
 		}
 
-		receiver.script = code
+		receiver.Code = code
 	} else {
-		if len(receiver.Script()) > 0 {
-			_, err = self.Eval(receiver.Script(), receiver, "code")
+		if len(receiver.Code) > 0 {
+			_, err = self.Eval(receiver.Code, receiver, "code")
 			if err != nil {
 				self.state.Set(snapshot)
 
@@ -235,7 +239,7 @@ func (self *StateTransition) TransitionState() (err error) {
 	return
 }
 
-func (self *StateTransition) transferValue(sender, receiver *StateObject) error {
+func (self *StateTransition) transferValue(sender, receiver *ethstate.StateObject) error {
 	if sender.Amount.Cmp(self.value) < 0 {
 		return fmt.Errorf("Insufficient funds to transfer value. Req %v, has %v", self.value, sender.Amount)
 	}
@@ -248,34 +252,35 @@ func (self *StateTransition) transferValue(sender, receiver *StateObject) error
 	return nil
 }
 
-func (self *StateTransition) Eval(script []byte, context *StateObject, typ string) (ret []byte, err error) {
+func (self *StateTransition) Eval(script []byte, context *ethstate.StateObject, typ string) (ret []byte, err error) {
 	var (
-		block     = self.block
-		initiator = self.Sender()
-		state     = self.state
+		transactor    = self.Sender()
+		state         = self.state
+		env           = NewEnv(state, self.tx, self.block)
+		callerClosure = ethvm.NewClosure(transactor, context, script, self.gas, self.gasPrice)
 	)
 
-	closure := NewClosure(initiator, context, script, state, self.gas, self.gasPrice)
-	vm := NewVm(state, nil, RuntimeVars{
-		Origin:      initiator.Address(),
-		Block:       block,
-		BlockNumber: block.Number,
-		PrevHash:    block.PrevHash,
-		Coinbase:    block.Coinbase,
-		Time:        block.Time,
-		Diff:        block.Difficulty,
-		Value:       self.value,
-	})
+	vm := ethvm.New(env)
 	vm.Verbose = true
 	vm.Fn = typ
 
-	ret, err = Call(vm, closure, self.data)
+	ret, _, err = callerClosure.Call(vm, self.tx.Data)
 
 	return
 }
 
-func Call(vm *Vm, closure *Closure, data []byte) (ret []byte, err error) {
-	ret, _, err = closure.Call(vm, data)
+// Converts an transaction in to a state object
+func MakeContract(tx *Transaction, state *ethstate.State) *ethstate.StateObject {
+	// Create contract if there's no recipient
+	if tx.IsContract() {
+		addr := tx.CreationAddress()
 
-	return
+		contract := state.NewStateObject(addr)
+		contract.InitCode = tx.Data
+		contract.State = ethstate.NewState(ethtrie.NewTrie(ethutil.Config.Db, ""))
+
+		return contract
+	}
+
+	return nil
 }
diff --git a/ethchain/transaction_pool.go b/ethchain/transaction_pool.go
index 6ab8d83d9..21c6ea3de 100644
--- a/ethchain/transaction_pool.go
+++ b/ethchain/transaction_pool.go
@@ -5,6 +5,7 @@ import (
 	"container/list"
 	"fmt"
 	"github.com/ethereum/eth-go/ethlog"
+	"github.com/ethereum/eth-go/ethstate"
 	"github.com/ethereum/eth-go/ethwire"
 	"math/big"
 	"sync"
@@ -252,7 +253,7 @@ func (pool *TxPool) CurrentTransactions() []*Transaction {
 	return txList
 }
 
-func (pool *TxPool) RemoveInvalid(state *State) {
+func (pool *TxPool) RemoveInvalid(state *ethstate.State) {
 	for e := pool.pool.Front(); e != nil; e = e.Next() {
 		tx := e.Value.(*Transaction)
 		sender := state.GetAccount(tx.Sender())
diff --git a/ethchain/vm_env.go b/ethchain/vm_env.go
new file mode 100644
index 000000000..ddead77fd
--- /dev/null
+++ b/ethchain/vm_env.go
@@ -0,0 +1,29 @@
+package ethchain
+
+import (
+	"github.com/ethereum/eth-go/ethstate"
+	"math/big"
+)
+
+type VMEnv struct {
+	state *ethstate.State
+	block *Block
+	tx    *Transaction
+}
+
+func NewEnv(state *ethstate.State, tx *Transaction, block *Block) *VMEnv {
+	return &VMEnv{
+		state: state,
+		block: block,
+		tx:    tx,
+	}
+}
+
+func (self *VMEnv) Origin() []byte         { return self.tx.Sender() }
+func (self *VMEnv) BlockNumber() *big.Int  { return self.block.Number }
+func (self *VMEnv) PrevHash() []byte       { return self.block.PrevHash }
+func (self *VMEnv) Coinbase() []byte       { return self.block.Coinbase }
+func (self *VMEnv) Time() int64            { return self.block.Time }
+func (self *VMEnv) Difficulty() *big.Int   { return self.block.Difficulty }
+func (self *VMEnv) Value() *big.Int        { return self.tx.Value }
+func (self *VMEnv) State() *ethstate.State { return self.state }
diff --git a/ethchain/vm_test.go b/ethchain/vm_test.go
deleted file mode 100644
index c8023cd79..000000000
--- a/ethchain/vm_test.go
+++ /dev/null
@@ -1,68 +0,0 @@
-package ethchain
-
-import (
-	_ "bytes"
-	"fmt"
-	"github.com/ethereum/eth-go/ethdb"
-	"github.com/ethereum/eth-go/ethutil"
-	"math/big"
-	"testing"
-)
-
-func TestRun4(t *testing.T) {
-	ethutil.ReadConfig(".ethtest", "/tmp/ethtest", "", "ETH")
-
-	db, _ := ethdb.NewMemDatabase()
-	state := NewState(ethutil.NewTrie(db, ""))
-
-	callerScript, err := ethutil.Compile(`
-	this.store[this.origin()] = 10**20
-	hello := "world"
-
-	return lambda {
-		big to = this.data[0]
-		big from = this.origin()
-		big value = this.data[1]
-
-		if this.store[from] >= value {
-			this.store[from] = this.store[from] - value
-			this.store[to] = this.store[to] + value
-		}
-	}
-	`)
-	if err != nil {
-		fmt.Println(err)
-	}
-	fmt.Println(Disassemble(callerScript))
-
-	callerTx := NewContractCreationTx(ethutil.Big("0"), ethutil.Big("1000"), ethutil.Big("100"), callerScript)
-	callerTx.Sign([]byte("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"))
-
-	// Contract addr as test address
-	gas := big.NewInt(1000)
-	gasPrice := big.NewInt(10)
-	account := NewAccount(ContractAddr, big.NewInt(10000000))
-	fmt.Println("account.Amount =", account.Amount)
-	c := MakeContract(callerTx, state)
-	e := account.ConvertGas(gas, gasPrice)
-	if e != nil {
-		fmt.Println(err)
-	}
-	fmt.Println("account.Amount =", account.Amount)
-	callerClosure := NewClosure(account, c, callerScript, state, gas, gasPrice)
-
-	vm := NewVm(state, nil, RuntimeVars{
-		Origin:      account.Address(),
-		BlockNumber: big.NewInt(1),
-		PrevHash:    ethutil.FromHex("5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6"),
-		Coinbase:    ethutil.FromHex("2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"),
-		Time:        1,
-		Diff:        big.NewInt(256),
-	})
-	var ret []byte
-	ret, _, e = callerClosure.Call(vm, nil, nil)
-	if e != nil {
-		fmt.Println("error", e)
-	}
-	fmt.Println(ret)
-}
diff --git a/ethpub/pub.go b/ethpub/pub.go
index 5d01a7a44..7cc7cf6ce 100644
--- a/ethpub/pub.go
+++ b/ethpub/pub.go
@@ -6,6 +6,7 @@ import (
 	"github.com/ethereum/eth-go/ethchain"
 	"github.com/ethereum/eth-go/ethcrypto"
 	"github.com/ethereum/eth-go/ethlog"
+	"github.com/ethereum/eth-go/ethstate"
 	"github.com/ethereum/eth-go/ethutil"
 	"math/big"
 	"strings"
@@ -24,11 +25,11 @@ type helper struct {
 func EthereumConfig(stateManager *ethchain.StateManager) helper {
 	return helper{stateManager}
 }
-func (self helper) obj() *ethchain.StateObject {
+func (self helper) obj() *ethstate.StateObject {
 	return self.sm.CurrentState().GetStateObject(cnfCtr)
 }
 
-func (self helper) NameReg() *ethchain.StateObject {
+func (self helper) NameReg() *ethstate.StateObject {
 	if self.obj() != nil {
 		addr := self.obj().GetStorage(big.NewInt(0))
 		if len(addr.Bytes()) > 0 {
@@ -48,6 +49,12 @@ type PEthereum struct {
 }
 
 func NewPEthereum(manager ethchain.EthManager) *PEthereum {
+	logger.Warnln("DEPRECATED: ethpub.New should be used in favour of ethpub.NewPEthereum")
+
+	return New(manager)
+}
+
+func New(manager ethchain.EthManager) *PEthereum {
 	return &PEthereum{
 		manager,
 		manager.StateManager(),
diff --git a/ethpub/types.go b/ethpub/types.go
index 52ea5a6bb..5cfa2705e 100644
--- a/ethpub/types.go
+++ b/ethpub/types.go
@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"github.com/ethereum/eth-go/ethchain"
 	"github.com/ethereum/eth-go/ethcrypto"
+	"github.com/ethereum/eth-go/ethstate"
 	"github.com/ethereum/eth-go/ethtrie"
 	"github.com/ethereum/eth-go/ethutil"
 	"strings"
@@ -154,10 +155,10 @@ func NewPReciept(contractCreation bool, creationAddress, hash, address []byte) *
 }
 
 type PStateObject struct {
-	object *ethchain.StateObject
+	object *ethstate.StateObject
 }
 
-func NewPStateObject(object *ethchain.StateObject) *PStateObject {
+func NewPStateObject(object *ethstate.StateObject) *PStateObject {
 	return &PStateObject{object: object}
 }
 
@@ -200,7 +201,7 @@ func (c *PStateObject) Nonce() int {
 
 func (c *PStateObject) Root() string {
 	if c.object != nil {
-		return ethutil.Bytes2Hex(ethutil.NewValue(c.object.State().Root()).Bytes())
+		return ethutil.Bytes2Hex(ethutil.NewValue(c.object.State.Root()).Bytes())
 	}
 
 	return "<err>"
@@ -208,7 +209,7 @@ func (c *PStateObject) Root() string {
 
 func (c *PStateObject) IsContract() bool {
 	if c.object != nil {
-		return len(c.object.Script()) > 0
+		return len(c.object.Code) > 0
 	}
 
 	return false
@@ -245,7 +246,7 @@ func (c *PStateObject) StateKeyVal(asJson bool) interface{} {
 
 func (c *PStateObject) Script() string {
 	if c.object != nil {
-		return strings.Join(ethchain.Disassemble(c.object.Script()), " ")
+		return strings.Join(ethchain.Disassemble(c.object.Code), " ")
 	}
 
 	return ""
@@ -253,7 +254,7 @@ func (c *PStateObject) Script() string {
 
 func (c *PStateObject) HexScript() string {
 	if c.object != nil {
-		return ethutil.Bytes2Hex(c.object.Script())
+		return ethutil.Bytes2Hex(c.object.Code)
 	}
 
 	return ""
@@ -265,6 +266,6 @@ type PStorageState struct {
 	Value        string
 }
 
-func NewPStorageState(storageObject *ethchain.StorageState) *PStorageState {
+func NewPStorageState(storageObject *ethstate.StorageState) *PStorageState {
 	return &PStorageState{ethutil.Bytes2Hex(storageObject.StateAddress), ethutil.Bytes2Hex(storageObject.Address), storageObject.Value.String()}
 }
diff --git a/ethstate/.ethtest b/ethstate/.ethtest
new file mode 100644
index 000000000..e69de29bb
--- /dev/null
+++ b/ethstate/.ethtest
diff --git a/ethstate/errors.go b/ethstate/errors.go
new file mode 100644
index 000000000..d5d7db86b
--- /dev/null
+++ b/ethstate/errors.go
@@ -0,0 +1,23 @@
+package ethstate
+
+import (
+	"fmt"
+	"math/big"
+)
+
+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}
+}
diff --git a/ethchain/state.go b/ethstate/state.go
index 3a9929ecc..51b585d4d 100644
--- a/ethchain/state.go
+++ b/ethstate/state.go
@@ -1,12 +1,15 @@
-package ethchain
+package ethstate
 
 import (
 	"github.com/ethereum/eth-go/ethcrypto"
+	"github.com/ethereum/eth-go/ethlog"
 	"github.com/ethereum/eth-go/ethtrie"
 	"github.com/ethereum/eth-go/ethutil"
 	"math/big"
 )
 
+var statelogger = ethlog.NewLogger("STATE")
+
 // States within the ethereum protocol are used to store anything
 // within the merkle trie. States take care of caching and storing
 // nested states. It's the general query interface to retrieve:
@@ -14,7 +17,7 @@ import (
 // * Accounts
 type State struct {
 	// The trie for this structure
-	trie *ethtrie.Trie
+	Trie *ethtrie.Trie
 
 	stateObjects map[string]*StateObject
 
@@ -23,7 +26,7 @@ type State struct {
 
 // Create a new state from a given trie
 func NewState(trie *ethtrie.Trie) *State {
-	return &State{trie: trie, stateObjects: make(map[string]*StateObject), manifest: NewManifest()}
+	return &State{Trie: trie, stateObjects: make(map[string]*StateObject), manifest: NewManifest()}
 }
 
 // Retrieve the balance from the given address or 0 if object not found
@@ -53,16 +56,16 @@ func (self *State) GetNonce(addr []byte) uint64 {
 func (self *State) UpdateStateObject(stateObject *StateObject) {
 	addr := stateObject.Address()
 
-	ethutil.Config.Db.Put(ethcrypto.Sha3Bin(stateObject.Script()), stateObject.Script())
+	ethutil.Config.Db.Put(ethcrypto.Sha3Bin(stateObject.Code), stateObject.Code)
 
-	self.trie.Update(string(addr), string(stateObject.RlpEncode()))
+	self.Trie.Update(string(addr), string(stateObject.RlpEncode()))
 
 	self.manifest.AddObjectChange(stateObject)
 }
 
 // Delete the given state object and delete it from the state trie
 func (self *State) DeleteStateObject(stateObject *StateObject) {
-	self.trie.Delete(string(stateObject.Address()))
+	self.Trie.Delete(string(stateObject.Address()))
 
 	delete(self.stateObjects, string(stateObject.Address()))
 }
@@ -76,7 +79,7 @@ func (self *State) GetStateObject(addr []byte) *StateObject {
 		return stateObject
 	}
 
-	data := self.trie.Get(string(addr))
+	data := self.Trie.Get(string(addr))
 	if len(data) == 0 {
 		return nil
 	}
@@ -99,6 +102,8 @@ func (self *State) GetOrNewStateObject(addr []byte) *StateObject {
 
 // Create a state object whether it exist in the trie or not
 func (self *State) NewStateObject(addr []byte) *StateObject {
+	addr = ethutil.Address(addr)
+
 	statelogger.Infof("(+) %x\n", addr)
 
 	stateObject := NewStateObject(addr)
@@ -117,12 +122,12 @@ func (self *State) GetAccount(addr []byte) *StateObject {
 //
 
 func (s *State) Cmp(other *State) bool {
-	return s.trie.Cmp(other.trie)
+	return s.Trie.Cmp(other.Trie)
 }
 
 func (self *State) Copy() *State {
-	if self.trie != nil {
-		state := NewState(self.trie.Copy())
+	if self.Trie != nil {
+		state := NewState(self.Trie.Copy())
 		for k, stateObject := range self.stateObjects {
 			state.stateObjects[k] = stateObject.Copy()
 		}
@@ -138,21 +143,21 @@ func (self *State) Set(state *State) {
 		panic("Tried setting 'state' to nil through 'Set'")
 	}
 
-	self.trie = state.trie
+	self.Trie = state.Trie
 	self.stateObjects = state.stateObjects
 }
 
 func (s *State) Root() interface{} {
-	return s.trie.Root
+	return s.Trie.Root
 }
 
 // Resets the trie and all siblings
 func (s *State) Reset() {
-	s.trie.Undo()
+	s.Trie.Undo()
 
 	// Reset all nested states
 	for _, stateObject := range s.stateObjects {
-		if stateObject.state == nil {
+		if stateObject.State == nil {
 			continue
 		}
 
@@ -169,14 +174,14 @@ func (s *State) Sync() {
 	for _, stateObject := range s.stateObjects {
 		//s.UpdateStateObject(stateObject)
 
-		if stateObject.state == nil {
+		if stateObject.State == nil {
 			continue
 		}
 
-		stateObject.state.Sync()
+		stateObject.State.Sync()
 	}
 
-	s.trie.Sync()
+	s.Trie.Sync()
 
 	s.Empty()
 }
@@ -197,11 +202,11 @@ func (self *State) Update() {
 	}
 
 	// FIXME trie delete is broken
-	valid, t2 := ethtrie.ParanoiaCheck(self.trie)
+	valid, t2 := ethtrie.ParanoiaCheck(self.Trie)
 	if !valid {
-		statelogger.Infof("Warn: PARANOIA: Different state root during copy %x vs %x\n", self.trie.Root, t2.Root)
+		statelogger.Infof("Warn: PARANOIA: Different state root during copy %x vs %x\n", self.Trie.Root, t2.Root)
 
-		self.trie = t2
+		self.Trie = t2
 	}
 }
 
@@ -212,6 +217,10 @@ func (self *State) CreateOutputForDiff() {
 	}
 }
 
+func (self *State) Manifest() *Manifest {
+	return self.manifest
+}
+
 // Object manifest
 //
 // The object manifest is used to keep changes to the state so we can keep track of the changes
@@ -221,8 +230,8 @@ type Manifest struct {
 	objectAddresses  map[string]bool
 	storageAddresses map[string]map[string]bool
 
-	objectChanges  map[string]*StateObject
-	storageChanges map[string]map[string]*big.Int
+	ObjectChanges  map[string]*StateObject
+	StorageChanges map[string]map[string]*big.Int
 }
 
 func NewManifest() *Manifest {
@@ -233,18 +242,18 @@ func NewManifest() *Manifest {
 }
 
 func (m *Manifest) Reset() {
-	m.objectChanges = make(map[string]*StateObject)
-	m.storageChanges = make(map[string]map[string]*big.Int)
+	m.ObjectChanges = make(map[string]*StateObject)
+	m.StorageChanges = make(map[string]map[string]*big.Int)
 }
 
 func (m *Manifest) AddObjectChange(stateObject *StateObject) {
-	m.objectChanges[string(stateObject.Address())] = stateObject
+	m.ObjectChanges[string(stateObject.Address())] = stateObject
 }
 
 func (m *Manifest) AddStorageChange(stateObject *StateObject, storageAddr []byte, storage *big.Int) {
-	if m.storageChanges[string(stateObject.Address())] == nil {
-		m.storageChanges[string(stateObject.Address())] = make(map[string]*big.Int)
+	if m.StorageChanges[string(stateObject.Address())] == nil {
+		m.StorageChanges[string(stateObject.Address())] = make(map[string]*big.Int)
 	}
 
-	m.storageChanges[string(stateObject.Address())][string(storageAddr)] = storage
+	m.StorageChanges[string(stateObject.Address())][string(storageAddr)] = storage
 }
diff --git a/ethchain/state_object.go b/ethstate/state_object.go
index 184609015..ab14b8604 100644
--- a/ethchain/state_object.go
+++ b/ethstate/state_object.go
@@ -1,4 +1,4 @@
-package ethchain
+package ethstate
 
 import (
 	"fmt"
@@ -6,13 +6,12 @@ import (
 	"github.com/ethereum/eth-go/ethtrie"
 	"github.com/ethereum/eth-go/ethutil"
 	"math/big"
-	"strings"
 )
 
 type Code []byte
 
 func (self Code) String() string {
-	return strings.Join(Disassemble(self), " ")
+	return string(self) //strings.Join(Disassemble(self), " ")
 }
 
 type Storage map[string]*ethutil.Value
@@ -31,13 +30,13 @@ type StateObject struct {
 	// Address of the object
 	address []byte
 	// Shared attributes
-	Amount     *big.Int
-	ScriptHash []byte
-	Nonce      uint64
+	Amount   *big.Int
+	CodeHash []byte
+	Nonce    uint64
 	// Contract related attributes
-	state      *State
-	script     Code
-	initScript Code
+	State    *State
+	Code     Code
+	InitCode Code
 
 	storage Storage
 
@@ -54,9 +53,10 @@ type StateObject struct {
 
 func (self *StateObject) Reset() {
 	self.storage = make(Storage)
-	self.state.Reset()
+	self.State.Reset()
 }
 
+/*
 // Converts an transaction in to a state object
 func MakeContract(tx *Transaction, state *State) *StateObject {
 	// Create contract if there's no recipient
@@ -64,7 +64,7 @@ func MakeContract(tx *Transaction, state *State) *StateObject {
 		addr := tx.CreationAddress()
 
 		contract := state.NewStateObject(addr)
-		contract.initScript = tx.Data
+		contract.initCode = tx.Data
 		contract.state = NewState(ethtrie.NewTrie(ethutil.Config.Db, ""))
 
 		return contract
@@ -72,13 +72,14 @@ func MakeContract(tx *Transaction, state *State) *StateObject {
 
 	return nil
 }
+*/
 
 func NewStateObject(addr []byte) *StateObject {
 	// This to ensure that it has 20 bytes (and not 0 bytes), thus left or right pad doesn't matter.
 	address := ethutil.Address(addr)
 
 	object := &StateObject{address: address, Amount: new(big.Int), gasPool: new(big.Int)}
-	object.state = NewState(ethtrie.NewTrie(ethutil.Config.Db, ""))
+	object.State = NewState(ethtrie.NewTrie(ethutil.Config.Db, ""))
 	object.storage = make(Storage)
 	object.gasPool = new(big.Int)
 
@@ -88,7 +89,7 @@ func NewStateObject(addr []byte) *StateObject {
 func NewContract(address []byte, Amount *big.Int, root []byte) *StateObject {
 	contract := NewStateObject(address)
 	contract.Amount = Amount
-	contract.state = NewState(ethtrie.NewTrie(ethutil.Config.Db, string(root)))
+	contract.State = NewState(ethtrie.NewTrie(ethutil.Config.Db, string(root)))
 
 	return contract
 }
@@ -106,11 +107,11 @@ func (self *StateObject) MarkForDeletion() {
 }
 
 func (c *StateObject) GetAddr(addr []byte) *ethutil.Value {
-	return ethutil.NewValueFromBytes([]byte(c.state.trie.Get(string(addr))))
+	return ethutil.NewValueFromBytes([]byte(c.State.Trie.Get(string(addr))))
 }
 
 func (c *StateObject) SetAddr(addr []byte, value interface{}) {
-	c.state.trie.Update(string(addr), string(ethutil.NewValue(value).Encode()))
+	c.State.Trie.Update(string(addr), string(ethutil.NewValue(value).Encode()))
 }
 
 func (self *StateObject) GetStorage(key *big.Int) *ethutil.Value {
@@ -140,15 +141,6 @@ func (self *StateObject) getStorage(k []byte) *ethutil.Value {
 func (self *StateObject) setStorage(k []byte, value *ethutil.Value) {
 	key := ethutil.LeftPadBytes(k, 32)
 	self.storage[string(key)] = value.Copy()
-
-	/*
-		if value.BigInt().Cmp(ethutil.Big0) == 0 {
-			self.state.trie.Delete(string(key))
-			return
-		}
-
-		self.SetAddr(key, value)
-	*/
 }
 
 // Iterate over each storage address and yield callback
@@ -160,7 +152,7 @@ func (self *StateObject) EachStorage(cb ethtrie.EachCallback) {
 		cb(key, encoded)
 	}
 
-	it := self.state.trie.NewIterator()
+	it := self.State.Trie.NewIterator()
 	it.Each(func(key string, value *ethutil.Value) {
 		// If it's cached don't call the callback.
 		if self.storage[key] == nil {
@@ -170,47 +162,31 @@ func (self *StateObject) EachStorage(cb ethtrie.EachCallback) {
 }
 
 func (self *StateObject) Sync() {
-	/*
-		fmt.Println("############# BEFORE ################")
-		self.state.EachStorage(func(key string, value *ethutil.Value) {
-			fmt.Printf("%x %x %x\n", self.Address(), []byte(key), value.Bytes())
-		})
-		fmt.Printf("%x @:%x\n", self.Address(), self.state.Root())
-		fmt.Println("#####################################")
-	*/
 	for key, value := range self.storage {
 		if value.Len() == 0 { // value.BigInt().Cmp(ethutil.Big0) == 0 {
 			//data := self.getStorage([]byte(key))
 			//fmt.Printf("deleting %x %x 0x%x\n", self.Address(), []byte(key), data)
-			self.state.trie.Delete(string(key))
+			self.State.Trie.Delete(string(key))
 			continue
 		}
 
 		self.SetAddr([]byte(key), value)
 	}
 
-	valid, t2 := ethtrie.ParanoiaCheck(self.state.trie)
+	valid, t2 := ethtrie.ParanoiaCheck(self.State.Trie)
 	if !valid {
-		statelogger.Infof("Warn: PARANOIA: Different state storage root during copy %x vs %x\n", self.state.trie.Root, t2.Root)
+		statelogger.Infof("Warn: PARANOIA: Different state storage root during copy %x vs %x\n", self.State.Trie.Root, t2.Root)
 
-		self.state.trie = t2
+		self.State.Trie = t2
 	}
-
-	/*
-		fmt.Println("############# AFTER ################")
-		self.state.EachStorage(func(key string, value *ethutil.Value) {
-			fmt.Printf("%x %x %x\n", self.Address(), []byte(key), value.Bytes())
-		})
-	*/
-	//fmt.Printf("%x @:%x\n", self.Address(), self.state.Root())
 }
 
 func (c *StateObject) GetInstr(pc *big.Int) *ethutil.Value {
-	if int64(len(c.script)-1) < pc.Int64() {
+	if int64(len(c.Code)-1) < pc.Int64() {
 		return ethutil.NewValue(0)
 	}
 
-	return ethutil.NewValueFromBytes([]byte{c.script[pc.Int64()]})
+	return ethutil.NewValueFromBytes([]byte{c.Code[pc.Int64()]})
 }
 
 func (c *StateObject) AddAmount(amount *big.Int) {
@@ -234,7 +210,7 @@ func (c *StateObject) SetAmount(amount *big.Int) {
 //
 
 // Return the gas back to the origin. Used by the Virtual machine or Closures
-func (c *StateObject) ReturnGas(gas, price *big.Int, state *State) {}
+func (c *StateObject) ReturnGas(gas, price *big.Int) {}
 func (c *StateObject) ConvertGas(gas, price *big.Int) error {
 	total := new(big.Int).Mul(gas, price)
 	if total.Cmp(c.Amount) > 0 {
@@ -277,13 +253,13 @@ func (self *StateObject) RefundGas(gas, price *big.Int) {
 func (self *StateObject) Copy() *StateObject {
 	stateObject := NewStateObject(self.Address())
 	stateObject.Amount.Set(self.Amount)
-	stateObject.ScriptHash = ethutil.CopyBytes(self.ScriptHash)
+	stateObject.CodeHash = ethutil.CopyBytes(self.CodeHash)
 	stateObject.Nonce = self.Nonce
-	if self.state != nil {
-		stateObject.state = self.state.Copy()
+	if self.State != nil {
+		stateObject.State = self.State.Copy()
 	}
-	stateObject.script = ethutil.CopyBytes(self.script)
-	stateObject.initScript = ethutil.CopyBytes(self.initScript)
+	stateObject.Code = ethutil.CopyBytes(self.Code)
+	stateObject.InitCode = ethutil.CopyBytes(self.InitCode)
 	stateObject.storage = self.storage.Copy()
 	stateObject.gasPool.Set(self.gasPool)
 
@@ -298,10 +274,6 @@ func (self *StateObject) Set(stateObject *StateObject) {
 // Attribute accessors
 //
 
-func (c *StateObject) State() *State {
-	return c.state
-}
-
 func (c *StateObject) N() *big.Int {
 	return big.NewInt(int64(c.Nonce))
 }
@@ -311,19 +283,14 @@ func (c *StateObject) Address() []byte {
 	return c.address
 }
 
-// Returns the main script body
-func (c *StateObject) Script() Code {
-	return c.script
-}
-
-// Returns the initialization script
+// Returns the initialization Code
 func (c *StateObject) Init() Code {
-	return c.initScript
+	return c.InitCode
 }
 
 // Debug stuff
 func (self *StateObject) CreateOutputForDiff() {
-	fmt.Printf("%x %x %x %x\n", self.Address(), self.state.Root(), self.Amount.Bytes(), self.Nonce)
+	fmt.Printf("%x %x %x %x\n", self.Address(), self.State.Root(), self.Amount.Bytes(), self.Nonce)
 	self.EachStorage(func(addr string, value *ethutil.Value) {
 		fmt.Printf("%x %x\n", addr, value.Bytes())
 	})
@@ -336,13 +303,13 @@ func (self *StateObject) CreateOutputForDiff() {
 // State object encoding methods
 func (c *StateObject) RlpEncode() []byte {
 	var root interface{}
-	if c.state != nil {
-		root = c.state.trie.Root
+	if c.State != nil {
+		root = c.State.Trie.Root
 	} else {
 		root = ""
 	}
 
-	return ethutil.Encode([]interface{}{c.Nonce, c.Amount, root, ethcrypto.Sha3Bin(c.script)})
+	return ethutil.Encode([]interface{}{c.Nonce, c.Amount, root, ethcrypto.Sha3Bin(c.Code)})
 }
 
 func (c *StateObject) RlpDecode(data []byte) {
@@ -350,13 +317,13 @@ func (c *StateObject) RlpDecode(data []byte) {
 
 	c.Nonce = decoder.Get(0).Uint()
 	c.Amount = decoder.Get(1).BigInt()
-	c.state = NewState(ethtrie.NewTrie(ethutil.Config.Db, decoder.Get(2).Interface()))
+	c.State = NewState(ethtrie.NewTrie(ethutil.Config.Db, decoder.Get(2).Interface()))
 	c.storage = make(map[string]*ethutil.Value)
 	c.gasPool = new(big.Int)
 
-	c.ScriptHash = decoder.Get(3).Bytes()
+	c.CodeHash = decoder.Get(3).Bytes()
 
-	c.script, _ = ethutil.Config.Db.Get(c.ScriptHash)
+	c.Code, _ = ethutil.Config.Db.Get(c.CodeHash)
 }
 
 // Storage change object. Used by the manifest for notifying changes to
diff --git a/ethchain/state_test.go b/ethstate/state_test.go
index 95be0f373..cd13e80bc 100644
--- a/ethchain/state_test.go
+++ b/ethstate/state_test.go
@@ -1,19 +1,23 @@
-package ethchain
+package ethstate
 
 import (
 	"github.com/ethereum/eth-go/ethdb"
+	"github.com/ethereum/eth-go/ethtrie"
 	"github.com/ethereum/eth-go/ethutil"
 	"testing"
 )
 
-func TestSnapshot(t *testing.T) {
-	ethutil.ReadConfig(".ethtest", "/tmp/ethtest", "", "ETH")
+var ZeroHash256 = make([]byte, 32)
 
+func TestSnapshot(t *testing.T) {
 	db, _ := ethdb.NewMemDatabase()
-	state := NewState(ethutil.NewTrie(db, ""))
+	ethutil.ReadConfig(".ethtest", "/tmp/ethtest", "")
+	ethutil.Config.Db = db
+
+	state := NewState(ethtrie.NewTrie(db, ""))
+
+	stateObject := state.GetOrNewStateObject([]byte("aa"))
 
-	stateObject := NewContract([]byte("aa"), ethutil.Big1, ZeroHash256)
-	state.UpdateStateObject(stateObject)
 	stateObject.SetStorage(ethutil.Big("0"), ethutil.NewValue(42))
 
 	snapshot := state.Copy()
@@ -24,7 +28,8 @@ func TestSnapshot(t *testing.T) {
 	state.Set(snapshot)
 
 	stateObject = state.GetStateObject([]byte("aa"))
-	if !stateObject.GetStorage(ethutil.Big("0")).Cmp(ethutil.NewValue(42)) {
-		t.Error("Expected storage 0 to be 42")
+	res := stateObject.GetStorage(ethutil.Big("0"))
+	if !res.Cmp(ethutil.NewValue(42)) {
+		t.Error("Expected storage 0 to be 42", res)
 	}
 }
diff --git a/ethutil/value.go b/ethutil/value.go
index fba7426d1..735a71dbc 100644
--- a/ethutil/value.go
+++ b/ethutil/value.go
@@ -68,6 +68,8 @@ func (val *Value) Uint() uint64 {
 		return uint64(Val)
 	} else if Val, ok := val.Val.([]byte); ok {
 		return ReadVarint(bytes.NewReader(Val))
+	} else if Val, ok := val.Val.(*big.Int); ok {
+		return Val.Uint64()
 	}
 
 	return 0
diff --git a/ethvm/.ethtest b/ethvm/.ethtest
new file mode 100644
index 000000000..e69de29bb
--- /dev/null
+++ b/ethvm/.ethtest
diff --git a/ethvm/asm.go b/ethvm/asm.go
new file mode 100644
index 000000000..7ff15a240
--- /dev/null
+++ b/ethvm/asm.go
@@ -0,0 +1,44 @@
+package ethvm
+
+import (
+	"fmt"
+	"github.com/ethereum/eth-go/ethutil"
+	"math/big"
+)
+
+func Disassemble(script []byte) (asm []string) {
+	pc := new(big.Int)
+	for {
+		if pc.Cmp(big.NewInt(int64(len(script)))) >= 0 {
+			return
+		}
+
+		// Get the memory location of pc
+		val := script[pc.Int64()]
+		// Get the opcode (it must be an opcode!)
+		op := OpCode(val)
+
+		asm = append(asm, fmt.Sprintf("%v", op))
+
+		switch op {
+		case PUSH1, PUSH2, PUSH3, PUSH4, PUSH5, PUSH6, PUSH7, PUSH8, PUSH9, PUSH10, PUSH11, PUSH12, PUSH13, PUSH14, PUSH15, PUSH16, PUSH17, PUSH18, PUSH19, PUSH20, PUSH21, PUSH22, PUSH23, PUSH24, PUSH25, PUSH26, PUSH27, PUSH28, PUSH29, PUSH30, PUSH31, PUSH32:
+			pc.Add(pc, ethutil.Big1)
+			a := int64(op) - int64(PUSH1) + 1
+			if int(pc.Int64()+a) > len(script) {
+				return nil
+			}
+
+			data := script[pc.Int64() : pc.Int64()+a]
+			if len(data) == 0 {
+				data = []byte{0}
+			}
+			asm = append(asm, fmt.Sprintf("0x%x", data))
+
+			pc.Add(pc, big.NewInt(a-1))
+		}
+
+		pc.Add(pc, ethutil.Big1)
+	}
+
+	return
+}
diff --git a/ethchain/closure.go b/ethvm/closure.go
index 1f7f8d703..505fd43fb 100644
--- a/ethchain/closure.go
+++ b/ethvm/closure.go
@@ -1,26 +1,25 @@
-package ethchain
+package ethvm
 
 // TODO Re write VM to use values instead of big integers?
 
 import (
+	"github.com/ethereum/eth-go/ethstate"
 	"github.com/ethereum/eth-go/ethutil"
 	"math/big"
 )
 
 type ClosureRef interface {
-	ReturnGas(*big.Int, *big.Int, *State)
+	ReturnGas(*big.Int, *big.Int)
 	Address() []byte
 	GetStorage(*big.Int) *ethutil.Value
 	SetStorage(*big.Int, *ethutil.Value)
-	N() *big.Int
 }
 
 // Basic inline closure object which implement the 'closure' interface
 type Closure struct {
 	caller ClosureRef
-	object *StateObject
-	Script []byte
-	State  *State
+	object *ethstate.StateObject
+	Code   []byte
 
 	Gas, UsedGas, Price *big.Int
 
@@ -28,8 +27,8 @@ type Closure struct {
 }
 
 // Create a new closure for the given data items
-func NewClosure(caller ClosureRef, object *StateObject, script []byte, state *State, gas, price *big.Int) *Closure {
-	c := &Closure{caller: caller, object: object, Script: script, State: state, Args: nil}
+func NewClosure(caller ClosureRef, object *ethstate.StateObject, code []byte, gas, price *big.Int) *Closure {
+	c := &Closure{caller: caller, object: object, Code: code, Args: nil}
 
 	// Gas should be a pointer so it can safely be reduced through the run
 	// This pointer will be off the state transition
@@ -57,11 +56,11 @@ func (c *Closure) Get(x *big.Int) *ethutil.Value {
 }
 
 func (c *Closure) Gets(x, y *big.Int) *ethutil.Value {
-	if x.Int64() >= int64(len(c.Script)) || y.Int64() >= int64(len(c.Script)) {
+	if x.Int64() >= int64(len(c.Code)) || y.Int64() >= int64(len(c.Code)) {
 		return ethutil.NewValue(0)
 	}
 
-	partial := c.Script[x.Int64() : x.Int64()+y.Int64()]
+	partial := c.Code[x.Int64() : x.Int64()+y.Int64()]
 
 	return ethutil.NewValue(partial)
 }
@@ -84,7 +83,7 @@ func (c *Closure) Call(vm *Vm, args []byte) ([]byte, *big.Int, error) {
 
 func (c *Closure) Return(ret []byte) []byte {
 	// Return the remaining gas to the caller
-	c.caller.ReturnGas(c.Gas, c.Price, c.State)
+	c.caller.ReturnGas(c.Gas, c.Price)
 
 	return ret
 }
@@ -102,20 +101,16 @@ func (c *Closure) UseGas(gas *big.Int) bool {
 }
 
 // Implement the caller interface
-func (c *Closure) ReturnGas(gas, price *big.Int, state *State) {
+func (c *Closure) ReturnGas(gas, price *big.Int) {
 	// Return the gas to the closure
 	c.Gas.Add(c.Gas, gas)
 	c.UsedGas.Sub(c.UsedGas, gas)
 }
 
-func (c *Closure) Object() *StateObject {
+func (c *Closure) Object() *ethstate.StateObject {
 	return c.object
 }
 
 func (c *Closure) Caller() ClosureRef {
 	return c.caller
 }
-
-func (c *Closure) N() *big.Int {
-	return c.object.N()
-}
diff --git a/ethvm/common.go b/ethvm/common.go
new file mode 100644
index 000000000..5a3aec648
--- /dev/null
+++ b/ethvm/common.go
@@ -0,0 +1,27 @@
+package ethvm
+
+import (
+	"github.com/ethereum/eth-go/ethlog"
+	"github.com/ethereum/eth-go/ethutil"
+	"math/big"
+)
+
+var vmlogger = ethlog.NewLogger("VM")
+
+var (
+	GasStep    = big.NewInt(1)
+	GasSha     = big.NewInt(20)
+	GasSLoad   = big.NewInt(20)
+	GasSStore  = big.NewInt(100)
+	GasBalance = big.NewInt(20)
+	GasCreate  = big.NewInt(100)
+	GasCall    = big.NewInt(20)
+	GasMemory  = big.NewInt(1)
+	GasData    = big.NewInt(5)
+	GasTx      = big.NewInt(500)
+
+	Pow256 = ethutil.BigPow(2, 256)
+
+	LogTyPretty byte = 0x1
+	LogTyDiff   byte = 0x2
+)
diff --git a/ethchain/stack.go b/ethvm/stack.go
index a9fa2e522..c06d63652 100644
--- a/ethchain/stack.go
+++ b/ethvm/stack.go
@@ -1,4 +1,4 @@
-package ethchain
+package ethvm
 
 import (
 	"fmt"
diff --git a/ethvm/types.go b/ethvm/types.go
new file mode 100644
index 000000000..1c3f66139
--- /dev/null
+++ b/ethvm/types.go
@@ -0,0 +1,346 @@
+package ethvm
+
+import (
+	"fmt"
+)
+
+type OpCode int
+
+// Op codes
+const (
+	// 0x0 range - arithmetic ops
+	STOP = 0x00
+	ADD  = 0x01
+	MUL  = 0x02
+	SUB  = 0x03
+	DIV  = 0x04
+	SDIV = 0x05
+	MOD  = 0x06
+	SMOD = 0x07
+	EXP  = 0x08
+	NEG  = 0x09
+	LT   = 0x0a
+	GT   = 0x0b
+	SLT  = 0x0c
+	SGT  = 0x0d
+	EQ   = 0x0e
+	NOT  = 0x0f
+
+	// 0x10 range - bit ops
+	AND  = 0x10
+	OR   = 0x11
+	XOR  = 0x12
+	BYTE = 0x13
+
+	// 0x20 range - crypto
+	SHA3 = 0x20
+
+	// 0x30 range - closure state
+	ADDRESS      = 0x30
+	BALANCE      = 0x31
+	ORIGIN       = 0x32
+	CALLER       = 0x33
+	CALLVALUE    = 0x34
+	CALLDATALOAD = 0x35
+	CALLDATASIZE = 0x36
+	CALLDATACOPY = 0x37
+	CODESIZE     = 0x38
+	CODECOPY     = 0x39
+	GASPRICE     = 0x3a
+
+	// 0x40 range - block operations
+	PREVHASH   = 0x40
+	COINBASE   = 0x41
+	TIMESTAMP  = 0x42
+	NUMBER     = 0x43
+	DIFFICULTY = 0x44
+	GASLIMIT   = 0x45
+
+	// 0x50 range - 'storage' and execution
+	POP     = 0x50
+	DUP     = 0x51
+	SWAP    = 0x52
+	MLOAD   = 0x53
+	MSTORE  = 0x54
+	MSTORE8 = 0x55
+	SLOAD   = 0x56
+	SSTORE  = 0x57
+	JUMP    = 0x58
+	JUMPI   = 0x59
+	PC      = 0x5a
+	MSIZE   = 0x5b
+	GAS     = 0x5c
+
+	// 0x60 range
+	PUSH1  = 0x60
+	PUSH2  = 0x61
+	PUSH3  = 0x62
+	PUSH4  = 0x63
+	PUSH5  = 0x64
+	PUSH6  = 0x65
+	PUSH7  = 0x66
+	PUSH8  = 0x67
+	PUSH9  = 0x68
+	PUSH10 = 0x69
+	PUSH11 = 0x6a
+	PUSH12 = 0x6b
+	PUSH13 = 0x6c
+	PUSH14 = 0x6d
+	PUSH15 = 0x6e
+	PUSH16 = 0x6f
+	PUSH17 = 0x70
+	PUSH18 = 0x71
+	PUSH19 = 0x72
+	PUSH20 = 0x73
+	PUSH21 = 0x74
+	PUSH22 = 0x75
+	PUSH23 = 0x76
+	PUSH24 = 0x77
+	PUSH25 = 0x78
+	PUSH26 = 0x79
+	PUSH27 = 0x7a
+	PUSH28 = 0x7b
+	PUSH29 = 0x7c
+	PUSH30 = 0x7d
+	PUSH31 = 0x7e
+	PUSH32 = 0x7f
+
+	// 0xf0 range - closures
+	CREATE = 0xf0
+	CALL   = 0xf1
+	RETURN = 0xf2
+
+	// 0x70 range - other
+	LOG     = 0xfe // XXX Unofficial
+	SUICIDE = 0xff
+)
+
+// Since the opcodes aren't all in order we can't use a regular slice
+var opCodeToString = map[OpCode]string{
+	// 0x0 range - arithmetic ops
+	STOP: "STOP",
+	ADD:  "ADD",
+	MUL:  "MUL",
+	SUB:  "SUB",
+	DIV:  "DIV",
+	SDIV: "SDIV",
+	MOD:  "MOD",
+	SMOD: "SMOD",
+	EXP:  "EXP",
+	NEG:  "NEG",
+	LT:   "LT",
+	GT:   "GT",
+	SLT:  "SLT",
+	SGT:  "SGT",
+	EQ:   "EQ",
+	NOT:  "NOT",
+
+	// 0x10 range - bit ops
+	AND:  "AND",
+	OR:   "OR",
+	XOR:  "XOR",
+	BYTE: "BYTE",
+
+	// 0x20 range - crypto
+	SHA3: "SHA3",
+
+	// 0x30 range - closure state
+	ADDRESS:      "ADDRESS",
+	BALANCE:      "BALANCE",
+	ORIGIN:       "ORIGIN",
+	CALLER:       "CALLER",
+	CALLVALUE:    "CALLVALUE",
+	CALLDATALOAD: "CALLDATALOAD",
+	CALLDATASIZE: "CALLDATASIZE",
+	CALLDATACOPY: "CALLDATACOPY",
+	CODESIZE:     "CODESIZE",
+	CODECOPY:     "CODECOPY",
+	GASPRICE:     "TXGASPRICE",
+
+	// 0x40 range - block operations
+	PREVHASH:   "PREVHASH",
+	COINBASE:   "COINBASE",
+	TIMESTAMP:  "TIMESTAMP",
+	NUMBER:     "NUMBER",
+	DIFFICULTY: "DIFFICULTY",
+	GASLIMIT:   "GASLIMIT",
+
+	// 0x50 range - 'storage' and execution
+	POP:     "POP",
+	DUP:     "DUP",
+	SWAP:    "SWAP",
+	MLOAD:   "MLOAD",
+	MSTORE:  "MSTORE",
+	MSTORE8: "MSTORE8",
+	SLOAD:   "SLOAD",
+	SSTORE:  "SSTORE",
+	JUMP:    "JUMP",
+	JUMPI:   "JUMPI",
+	PC:      "PC",
+	MSIZE:   "MSIZE",
+	GAS:     "GAS",
+
+	// 0x60 range - push
+	PUSH1:  "PUSH1",
+	PUSH2:  "PUSH2",
+	PUSH3:  "PUSH3",
+	PUSH4:  "PUSH4",
+	PUSH5:  "PUSH5",
+	PUSH6:  "PUSH6",
+	PUSH7:  "PUSH7",
+	PUSH8:  "PUSH8",
+	PUSH9:  "PUSH9",
+	PUSH10: "PUSH10",
+	PUSH11: "PUSH11",
+	PUSH12: "PUSH12",
+	PUSH13: "PUSH13",
+	PUSH14: "PUSH14",
+	PUSH15: "PUSH15",
+	PUSH16: "PUSH16",
+	PUSH17: "PUSH17",
+	PUSH18: "PUSH18",
+	PUSH19: "PUSH19",
+	PUSH20: "PUSH20",
+	PUSH21: "PUSH21",
+	PUSH22: "PUSH22",
+	PUSH23: "PUSH23",
+	PUSH24: "PUSH24",
+	PUSH25: "PUSH25",
+	PUSH26: "PUSH26",
+	PUSH27: "PUSH27",
+	PUSH28: "PUSH28",
+	PUSH29: "PUSH29",
+	PUSH30: "PUSH30",
+	PUSH31: "PUSH31",
+	PUSH32: "PUSH32",
+
+	// 0xf0 range
+	CREATE: "CREATE",
+	CALL:   "CALL",
+	RETURN: "RETURN",
+
+	// 0x70 range - other
+	LOG:     "LOG",
+	SUICIDE: "SUICIDE",
+}
+
+func (o OpCode) String() string {
+	str := opCodeToString[o]
+	if len(str) == 0 {
+		return fmt.Sprintf("Missing opcode 0x%x", int(o))
+	}
+
+	return str
+}
+
+// Op codes for assembling
+var OpCodes = map[string]byte{
+	// 0x0 range - arithmetic ops
+	"STOP": 0x00,
+	"ADD":  0x01,
+	"MUL":  0x02,
+	"SUB":  0x03,
+	"DIV":  0x04,
+	"SDIV": 0x05,
+	"MOD":  0x06,
+	"SMOD": 0x07,
+	"EXP":  0x08,
+	"NEG":  0x09,
+	"LT":   0x0a,
+	"GT":   0x0b,
+	"EQ":   0x0c,
+	"NOT":  0x0d,
+
+	// 0x10 range - bit ops
+	"AND":  0x10,
+	"OR":   0x11,
+	"XOR":  0x12,
+	"BYTE": 0x13,
+
+	// 0x20 range - crypto
+	"SHA3": 0x20,
+
+	// 0x30 range - closure state
+	"ADDRESS":      0x30,
+	"BALANCE":      0x31,
+	"ORIGIN":       0x32,
+	"CALLER":       0x33,
+	"CALLVALUE":    0x34,
+	"CALLDATALOAD": 0x35,
+	"CALLDATASIZE": 0x36,
+	"GASPRICE":     0x38,
+
+	// 0x40 range - block operations
+	"PREVHASH":   0x40,
+	"COINBASE":   0x41,
+	"TIMESTAMP":  0x42,
+	"NUMBER":     0x43,
+	"DIFFICULTY": 0x44,
+	"GASLIMIT":   0x45,
+
+	// 0x50 range - 'storage' and execution
+	"POP":     0x51,
+	"DUP":     0x52,
+	"SWAP":    0x53,
+	"MLOAD":   0x54,
+	"MSTORE":  0x55,
+	"MSTORE8": 0x56,
+	"SLOAD":   0x57,
+	"SSTORE":  0x58,
+	"JUMP":    0x59,
+	"JUMPI":   0x5a,
+	"PC":      0x5b,
+	"MSIZE":   0x5c,
+
+	// 0x70 range - 'push'
+	"PUSH1":  0x60,
+	"PUSH2":  0x61,
+	"PUSH3":  0x62,
+	"PUSH4":  0x63,
+	"PUSH5":  0x64,
+	"PUSH6":  0x65,
+	"PUSH7":  0x66,
+	"PUSH8":  0x67,
+	"PUSH9":  0x68,
+	"PUSH10": 0x69,
+	"PUSH11": 0x6a,
+	"PUSH12": 0x6b,
+	"PUSH13": 0x6c,
+	"PUSH14": 0x6d,
+	"PUSH15": 0x6e,
+	"PUSH16": 0x6f,
+	"PUSH17": 0x70,
+	"PUSH18": 0x71,
+	"PUSH19": 0x72,
+	"PUSH20": 0x73,
+	"PUSH21": 0x74,
+	"PUSH22": 0x75,
+	"PUSH23": 0x76,
+	"PUSH24": 0x77,
+	"PUSH25": 0x78,
+	"PUSH26": 0x70,
+	"PUSH27": 0x7a,
+	"PUSH28": 0x7b,
+	"PUSH29": 0x7c,
+	"PUSH30": 0x7d,
+	"PUSH31": 0x7e,
+	"PUSH32": 0x7f,
+
+	// 0xf0 range - closures
+	"CREATE": 0xf0,
+	"CALL":   0xf1,
+	"RETURN": 0xf2,
+
+	// 0x70 range - other
+	"LOG":     0xfe,
+	"SUICIDE": 0x7f,
+}
+
+func IsOpCode(s string) bool {
+	for key, _ := range OpCodes {
+		if key == s {
+			return true
+		}
+	}
+	return false
+}
diff --git a/ethchain/vm.go b/ethvm/vm.go
index d5f65676c..b81c8a189 100644
--- a/ethchain/vm.go
+++ b/ethvm/vm.go
@@ -1,35 +1,17 @@
-package ethchain
+package ethvm
 
 import (
 	"fmt"
 	"github.com/ethereum/eth-go/ethcrypto"
-	"github.com/ethereum/eth-go/ethlog"
+	"github.com/ethereum/eth-go/ethstate"
 	"github.com/ethereum/eth-go/ethutil"
 	"math"
 	"math/big"
 )
 
-var vmlogger = ethlog.NewLogger("VM")
-
-var (
-	GasStep    = big.NewInt(1)
-	GasSha     = big.NewInt(20)
-	GasSLoad   = big.NewInt(20)
-	GasSStore  = big.NewInt(100)
-	GasBalance = big.NewInt(20)
-	GasCreate  = big.NewInt(100)
-	GasCall    = big.NewInt(20)
-	GasMemory  = big.NewInt(1)
-	GasData    = big.NewInt(5)
-	GasTx      = big.NewInt(500)
-
-	LogTyPretty byte = 0x1
-	LogTyDiff   byte = 0x2
-)
-
 type Debugger interface {
-	BreakHook(step int, op OpCode, mem *Memory, stack *Stack, stateObject *StateObject) bool
-	StepHook(step int, op OpCode, mem *Memory, stack *Stack, stateObject *StateObject) bool
+	BreakHook(step int, op OpCode, mem *Memory, stack *Stack, object *ethstate.StateObject) bool
+	StepHook(step int, op OpCode, mem *Memory, stack *Stack, object *ethstate.StateObject) bool
 	BreakPoints() []int64
 	SetCode(byteCode []byte)
 }
@@ -40,11 +22,7 @@ type Vm struct {
 	// non-persistent key/value memory storage
 	mem map[string]*big.Int
 
-	vars RuntimeVars
-
-	state *State
-
-	stateManager *StateManager
+	env Environment
 
 	Verbose bool
 
@@ -59,71 +37,59 @@ type Vm struct {
 	BreakPoints []int64
 	Stepping    bool
 	Fn          string
-}
 
-type RuntimeVars struct {
-	Origin      []byte
-	Block       *Block
-	BlockNumber *big.Int
-	PrevHash    []byte
-	Coinbase    []byte
-	Time        int64
-	Diff        *big.Int
-	TxData      []string
-	Value       *big.Int
+	Recoverable bool
 }
 
-func (self *Vm) Printf(format string, v ...interface{}) *Vm {
-	if self.Verbose && self.logTy == LogTyPretty {
-		self.logStr += fmt.Sprintf(format, v...)
-	}
+type Environment interface {
+	State() *ethstate.State
 
-	return self
+	Origin() []byte
+	BlockNumber() *big.Int
+	PrevHash() []byte
+	Coinbase() []byte
+	Time() int64
+	Difficulty() *big.Int
+	Value() *big.Int
 }
 
-func (self *Vm) Endl() *Vm {
-	if self.Verbose && self.logTy == LogTyPretty {
-		vmlogger.Debugln(self.logStr)
-		self.logStr = ""
-	}
-
-	return self
+type Object interface {
+	GetStorage(key *big.Int) *ethutil.Value
+	SetStorage(key *big.Int, value *ethutil.Value)
 }
 
-func NewVm(state *State, stateManager *StateManager, vars RuntimeVars) *Vm {
+func New(env Environment) *Vm {
 	lt := LogTyPretty
 	if ethutil.Config.Diff {
 		lt = LogTyDiff
 	}
 
-	return &Vm{vars: vars, state: state, stateManager: stateManager, logTy: lt}
+	return &Vm{env: env, logTy: lt, Recoverable: true}
 }
 
-var Pow256 = ethutil.BigPow(2, 256)
-
-var isRequireError = false
-
-func (vm *Vm) RunClosure(closure *Closure) (ret []byte, err error) {
-	// Recover from any require exception
-	defer func() {
-		if r := recover(); r != nil {
-			ret = closure.Return(nil)
-			err = fmt.Errorf("%v", r)
-			vmlogger.Errorln("vm err", err)
-		}
-	}()
+func (self *Vm) RunClosure(closure *Closure) (ret []byte, err error) {
+	if self.Recoverable {
+		// Recover from any require exception
+		defer func() {
+			if r := recover(); r != nil {
+				ret = closure.Return(nil)
+				err = fmt.Errorf("%v", r)
+				vmlogger.Errorln("vm err", err)
+			}
+		}()
+	}
 
 	// Debug hook
-	if vm.Dbg != nil {
-		vm.Dbg.SetCode(closure.Script)
+	if self.Dbg != nil {
+		self.Dbg.SetCode(closure.Code)
 	}
 
 	// Don't bother with the execution if there's no code.
-	if len(closure.Script) == 0 {
+	if len(closure.Code) == 0 {
 		return closure.Return(nil), nil
 	}
 
-	vmlogger.Debugf("(%s) %x gas: %v (d) %x\n", vm.Fn, closure.Address(), closure.Gas, closure.Args)
+	vmlogger.Debugf("(%s) %x gas: %v (d) %x\n", self.Fn, closure.Address(), closure.Gas, closure.Args)
 
 	var (
 		op OpCode
@@ -135,7 +101,6 @@ func (vm *Vm) RunClosure(closure *Closure) (ret []byte, err error) {
 		prevStep = 0
 		require  = func(m int) {
 			if stack.Len() < m {
-				isRequireError = true
 				panic(fmt.Sprintf("%04v (%v) stack err size = %d, required = %d", pc, op, stack.Len(), m))
 			}
 		}
@@ -154,22 +119,23 @@ func (vm *Vm) RunClosure(closure *Closure) (ret []byte, err error) {
 
 		// XXX Leave this Println intact. Don't change this to the log system.
 		// Used for creating diffs between implementations
-		if vm.logTy == LogTyDiff {
-			switch op {
-			case STOP, RETURN, SUICIDE:
-				closure.object.Sync()
-				closure.object.EachStorage(func(key string, value *ethutil.Value) {
-					value.Decode()
-					fmt.Printf("%x %x\n", new(big.Int).SetBytes([]byte(key)).Bytes(), value.Bytes())
-				})
-			}
+		if self.logTy == LogTyDiff {
+			/*
+				switch op {
+				case STOP, RETURN, SUICIDE:
+					closure.object.EachStorage(func(key string, value *ethutil.Value) {
+						value.Decode()
+						fmt.Printf("%x %x\n", new(big.Int).SetBytes([]byte(key)).Bytes(), value.Bytes())
+					})
+				}
 
-			b := pc.Bytes()
-			if len(b) == 0 {
-				b = []byte{0}
-			}
+				b := pc.Bytes()
+				if len(b) == 0 {
+					b = []byte{0}
+				}
 
-			fmt.Printf("%x %x %x %x\n", closure.Address(), b, []byte{byte(op)}, closure.Gas.Bytes())
+				fmt.Printf("%x %x %x %x\n", closure.Address(), b, []byte{byte(op)}, closure.Gas.Bytes())
+			*/
 		}
 
 		gas := new(big.Int)
@@ -261,8 +227,8 @@ func (vm *Vm) RunClosure(closure *Closure) (ret []byte, err error) {
 			return closure.Return(nil), err
 		}
 
-		vm.Printf("(pc) %-3d -o- %-14s", pc, op.String())
-		vm.Printf(" (g) %-3v (%v)", gas, closure.Gas)
+		self.Printf("(pc) %-3d -o- %-14s", pc, op.String())
+		self.Printf(" (g) %-3v (%v)", gas, closure.Gas)
 
 		mem.Resize(newMemSize)
 
@@ -274,43 +240,43 @@ func (vm *Vm) RunClosure(closure *Closure) (ret []byte, err error) {
 		case ADD:
 			require(2)
 			x, y := stack.Popn()
-			vm.Printf(" %v + %v", y, x)
+			self.Printf(" %v + %v", y, x)
 
 			base.Add(y, x)
 
-			vm.Printf(" = %v", base)
+			self.Printf(" = %v", base)
 			// Pop result back on the stack
 			stack.Push(base)
 		case SUB:
 			require(2)
 			x, y := stack.Popn()
-			vm.Printf(" %v - %v", y, x)
+			self.Printf(" %v - %v", y, x)
 
 			base.Sub(y, x)
 
-			vm.Printf(" = %v", base)
+			self.Printf(" = %v", base)
 			// Pop result back on the stack
 			stack.Push(base)
 		case MUL:
 			require(2)
 			x, y := stack.Popn()
-			vm.Printf(" %v * %v", y, x)
+			self.Printf(" %v * %v", y, x)
 
 			base.Mul(y, x)
 
-			vm.Printf(" = %v", base)
+			self.Printf(" = %v", base)
 			// Pop result back on the stack
 			stack.Push(base)
 		case DIV:
 			require(2)
 			x, y := stack.Popn()
-			vm.Printf(" %v / %v", y, x)
+			self.Printf(" %v / %v", y, x)
 
 			if x.Cmp(ethutil.Big0) != 0 {
 				base.Div(y, x)
 			}
 
-			vm.Printf(" = %v", base)
+			self.Printf(" = %v", base)
 			// Pop result back on the stack
 			stack.Push(base)
 		case SDIV:
@@ -334,11 +300,11 @@ func (vm *Vm) RunClosure(closure *Closure) (ret []byte, err error) {
 			require(2)
 			x, y := stack.Popn()
 
-			vm.Printf(" %v %% %v", y, x)
+			self.Printf(" %v %% %v", y, x)
 
 			base.Mod(y, x)
 
-			vm.Printf(" = %v", base)
+			self.Printf(" = %v", base)
 			stack.Push(base)
 		case SMOD:
 			require(2)
@@ -361,11 +327,11 @@ func (vm *Vm) RunClosure(closure *Closure) (ret []byte, err error) {
 			require(2)
 			x, y := stack.Popn()
 
-			vm.Printf(" %v ** %v", y, x)
+			self.Printf(" %v ** %v", y, x)
 
 			base.Exp(y, x, Pow256)
 
-			vm.Printf(" = %v", base)
+			self.Printf(" = %v", base)
 
 			stack.Push(base)
 		case NEG:
@@ -375,7 +341,7 @@ func (vm *Vm) RunClosure(closure *Closure) (ret []byte, err error) {
 		case LT:
 			require(2)
 			x, y := stack.Popn()
-			vm.Printf(" %v < %v", y, x)
+			self.Printf(" %v < %v", y, x)
 			// x < y
 			if y.Cmp(x) < 0 {
 				stack.Push(ethutil.BigTrue)
@@ -385,7 +351,7 @@ func (vm *Vm) RunClosure(closure *Closure) (ret []byte, err error) {
 		case GT:
 			require(2)
 			x, y := stack.Popn()
-			vm.Printf(" %v > %v", y, x)
+			self.Printf(" %v > %v", y, x)
 
 			// x > y
 			if y.Cmp(x) > 0 {
@@ -397,7 +363,7 @@ func (vm *Vm) RunClosure(closure *Closure) (ret []byte, err error) {
 		case SLT:
 			require(2)
 			x, y := stack.Popn()
-			vm.Printf(" %v < %v", y, x)
+			self.Printf(" %v < %v", y, x)
 			// x < y
 			if y.Cmp(x) < 0 {
 				stack.Push(ethutil.BigTrue)
@@ -407,7 +373,7 @@ func (vm *Vm) RunClosure(closure *Closure) (ret []byte, err error) {
 		case SGT:
 			require(2)
 			x, y := stack.Popn()
-			vm.Printf(" %v > %v", y, x)
+			self.Printf(" %v > %v", y, x)
 
 			// x > y
 			if y.Cmp(x) > 0 {
@@ -419,7 +385,7 @@ func (vm *Vm) RunClosure(closure *Closure) (ret []byte, err error) {
 		case EQ:
 			require(2)
 			x, y := stack.Popn()
-			vm.Printf(" %v == %v", y, x)
+			self.Printf(" %v == %v", y, x)
 
 			// x == y
 			if x.Cmp(y) == 0 {
@@ -440,29 +406,29 @@ func (vm *Vm) RunClosure(closure *Closure) (ret []byte, err error) {
 		case AND:
 			require(2)
 			x, y := stack.Popn()
-			vm.Printf(" %v & %v", y, x)
+			self.Printf(" %v & %v", y, x)
 
 			stack.Push(base.And(y, x))
 		case OR:
 			require(2)
 			x, y := stack.Popn()
-			vm.Printf(" %v | %v", y, x)
+			self.Printf(" %v | %v", y, x)
 
 			stack.Push(base.Or(y, x))
 		case XOR:
 			require(2)
 			x, y := stack.Popn()
-			vm.Printf(" %v ^ %v", y, x)
+			self.Printf(" %v ^ %v", y, x)
 
 			stack.Push(base.Xor(y, x))
 		case BYTE:
 			require(2)
 			val, th := stack.Popn()
 			if th.Cmp(big.NewInt(32)) < 0 && th.Cmp(big.NewInt(int64(len(val.Bytes())))) < 0 {
-				byt := big.NewInt(int64(val.Bytes()[th.Int64()]))
+				byt := big.NewInt(int64(ethutil.LeftPadBytes(val.Bytes(), 32)[th.Int64()]))
 				stack.Push(byt)
 
-				vm.Printf(" => 0x%x", byt.Bytes())
+				self.Printf(" => 0x%x", byt.Bytes())
 			} else {
 				stack.Push(ethutil.BigFalse)
 			}
@@ -475,34 +441,38 @@ func (vm *Vm) RunClosure(closure *Closure) (ret []byte, err error) {
 
 			stack.Push(ethutil.BigD(data))
 
-			vm.Printf(" => %x", data)
+			self.Printf(" => %x", data)
 			// 0x30 range
 		case ADDRESS:
 			stack.Push(ethutil.BigD(closure.Address()))
 
-			vm.Printf(" => %x", closure.Address())
+			self.Printf(" => %x", closure.Address())
 		case BALANCE:
 			require(1)
 
 			addr := stack.Pop().Bytes()
-			balance := vm.state.GetBalance(addr)
+			balance := self.env.State().GetBalance(addr)
 
 			stack.Push(balance)
 
-			vm.Printf(" => %v (%x)", balance, addr)
+			self.Printf(" => %v (%x)", balance, addr)
 		case ORIGIN:
-			stack.Push(ethutil.BigD(vm.vars.Origin))
+			origin := self.env.Origin()
+
+			stack.Push(ethutil.BigD(origin))
 
-			vm.Printf(" => %x", vm.vars.Origin)
+			self.Printf(" => %x", origin)
 		case CALLER:
 			caller := closure.caller.Address()
 			stack.Push(ethutil.BigD(caller))
 
-			vm.Printf(" => %x", caller)
+			self.Printf(" => %x", caller)
 		case CALLVALUE:
-			stack.Push(vm.vars.Value)
+			value := self.env.Value()
+
+			stack.Push(value)
 
-			vm.Printf(" => %v", vm.vars.Value)
+			self.Printf(" => %v", value)
 		case CALLDATALOAD:
 			require(1)
 			var (
@@ -518,14 +488,14 @@ func (vm *Vm) RunClosure(closure *Closure) (ret []byte, err error) {
 				copy(data, closure.Args[offset.Int64():length.Int64()])
 			}
 
-			vm.Printf(" => 0x%x", data)
+			self.Printf(" => 0x%x", data)
 
 			stack.Push(ethutil.BigD(data))
 		case CALLDATASIZE:
 			l := int64(len(closure.Args))
 			stack.Push(big.NewInt(l))
 
-			vm.Printf(" => %d", l)
+			self.Printf(" => %d", l)
 		case CALLDATACOPY:
 			var (
 				size = int64(len(closure.Args))
@@ -545,13 +515,13 @@ func (vm *Vm) RunClosure(closure *Closure) (ret []byte, err error) {
 
 			mem.Set(mOff, l, code)
 		case CODESIZE:
-			l := big.NewInt(int64(len(closure.Script)))
+			l := big.NewInt(int64(len(closure.Code)))
 			stack.Push(l)
 
-			vm.Printf(" => %d", l)
+			self.Printf(" => %d", l)
 		case CODECOPY:
 			var (
-				size = int64(len(closure.Script))
+				size = int64(len(closure.Code))
 				mOff = stack.Pop().Int64()
 				cOff = stack.Pop().Int64()
 				l    = stack.Pop().Int64()
@@ -564,25 +534,45 @@ func (vm *Vm) RunClosure(closure *Closure) (ret []byte, err error) {
 				l = 0
 			}
 
-			code := closure.Script[cOff : cOff+l]
-			//fmt.Println("len:", l, "code off:", cOff, "mem off:", mOff)
+			code := closure.Code[cOff : cOff+l]
 
 			mem.Set(mOff, l, code)
-			//fmt.Println(Code(mem.Get(mOff, l)))
 		case GASPRICE:
 			stack.Push(closure.Price)
 
+			self.Printf(" => %v", closure.Price)
+
 			// 0x40 range
 		case PREVHASH:
-			stack.Push(ethutil.BigD(vm.vars.PrevHash))
+			prevHash := self.env.PrevHash()
+
+			stack.Push(ethutil.BigD(prevHash))
+
+			self.Printf(" => 0x%x", prevHash)
 		case COINBASE:
-			stack.Push(ethutil.BigD(vm.vars.Coinbase))
+			coinbase := self.env.Coinbase()
+
+			stack.Push(ethutil.BigD(coinbase))
+
+			self.Printf(" => 0x%x", coinbase)
 		case TIMESTAMP:
-			stack.Push(big.NewInt(vm.vars.Time))
+			time := self.env.Time()
+
+			stack.Push(big.NewInt(time))
+
+			self.Printf(" => 0x%x", time)
 		case NUMBER:
-			stack.Push(vm.vars.BlockNumber)
+			number := self.env.BlockNumber()
+
+			stack.Push(number)
+
+			self.Printf(" => 0x%x", number.Bytes())
 		case DIFFICULTY:
-			stack.Push(vm.vars.Diff)
+			difficulty := self.env.Difficulty()
+
+			stack.Push(difficulty)
+
+			self.Printf(" => 0x%x", difficulty.Bytes())
 		case GASLIMIT:
 			// TODO
 			stack.Push(big.NewInt(0))
@@ -599,7 +589,7 @@ func (vm *Vm) RunClosure(closure *Closure) (ret []byte, err error) {
 
 			step += int(op) - int(PUSH1) + 1
 
-			vm.Printf(" => 0x%x", data.Bytes())
+			self.Printf(" => 0x%x", data.Bytes())
 		case POP:
 			require(1)
 			stack.Pop()
@@ -607,7 +597,7 @@ func (vm *Vm) RunClosure(closure *Closure) (ret []byte, err error) {
 			require(1)
 			stack.Push(stack.Peek())
 
-			vm.Printf(" => 0x%x", stack.Peek().Bytes())
+			self.Printf(" => 0x%x", stack.Peek().Bytes())
 		case SWAP:
 			require(2)
 			x, y := stack.Popn()
@@ -619,14 +609,14 @@ func (vm *Vm) RunClosure(closure *Closure) (ret []byte, err error) {
 			val := ethutil.BigD(mem.Get(offset.Int64(), 32))
 			stack.Push(val)
 
-			vm.Printf(" => 0x%x", val.Bytes())
+			self.Printf(" => 0x%x", val.Bytes())
 		case MSTORE: // Store the value at stack top-1 in to memory at location stack top
 			require(2)
 			// Pop value of the stack
 			val, mStart := stack.Popn()
 			mem.Set(mStart.Int64(), 32, ethutil.BigToBytes(val, 256))
 
-			vm.Printf(" => 0x%x", val)
+			self.Printf(" => 0x%x", val)
 		case MSTORE8:
 			require(2)
 			val, mStart := stack.Popn()
@@ -634,7 +624,7 @@ func (vm *Vm) RunClosure(closure *Closure) (ret []byte, err error) {
 			//mem.Set(mStart.Int64(), 32, ethutil.BigToBytes(base, 256))
 			mem.store[mStart.Int64()] = byte(val.Int64() & 0xff)
 
-			vm.Printf(" => 0x%x", val)
+			self.Printf(" => 0x%x", val)
 		case SLOAD:
 			require(1)
 			loc := stack.Pop()
@@ -642,21 +632,21 @@ func (vm *Vm) RunClosure(closure *Closure) (ret []byte, err error) {
 
 			stack.Push(val.BigInt())
 
-			vm.Printf(" {0x%x : 0x%x}", loc.Bytes(), val.Bytes())
+			self.Printf(" {0x%x : 0x%x}", loc.Bytes(), val.Bytes())
 		case SSTORE:
 			require(2)
 			val, loc := stack.Popn()
 			closure.SetStorage(loc, ethutil.NewValue(val))
 
 			// Add the change to manifest
-			vm.state.manifest.AddStorageChange(closure.Object(), loc.Bytes(), val)
+			self.env.State().Manifest().AddStorageChange(closure.Object(), loc.Bytes(), val)
 
-			vm.Printf(" {0x%x : 0x%x}", loc, val)
+			self.Printf(" {0x%x : 0x%x}", loc.Bytes(), val.Bytes())
 		case JUMP:
 			require(1)
 			pc = stack.Pop()
 			// Reduce pc by one because of the increment that's at the end of this for loop
-			vm.Printf(" ~> %v", pc).Endl()
+			self.Printf(" ~> %v", pc).Endl()
 
 			continue
 		case JUMPI:
@@ -665,11 +655,11 @@ func (vm *Vm) RunClosure(closure *Closure) (ret []byte, err error) {
 			if cond.Cmp(ethutil.BigTrue) >= 0 {
 				pc = pos
 
-				vm.Printf(" ~> %v (t)", pc).Endl()
+				self.Printf(" ~> %v (t)", pc).Endl()
 
 				continue
 			} else {
-				vm.Printf(" (f)")
+				self.Printf(" (f)")
 			}
 		case PC:
 			stack.Push(pc)
@@ -688,20 +678,20 @@ func (vm *Vm) RunClosure(closure *Closure) (ret []byte, err error) {
 
 				// Snapshot the current stack so we are able to
 				// revert back to it later.
-				snapshot = vm.state.Copy()
+				snapshot = self.env.State().Copy()
 			)
 
 			// Generate a new address
-			addr := ethcrypto.CreateAddress(closure.Address(), closure.N().Uint64())
-			for i := uint64(0); vm.state.GetStateObject(addr) != nil; i++ {
-				ethcrypto.CreateAddress(closure.Address(), closure.N().Uint64()+i)
+			addr := ethcrypto.CreateAddress(closure.Address(), closure.object.Nonce)
+			for i := uint64(0); self.env.State().GetStateObject(addr) != nil; i++ {
+				ethcrypto.CreateAddress(closure.Address(), closure.object.Nonce+i)
 			}
 			closure.object.Nonce++
 
-			vm.Printf(" (*) %x", addr).Endl()
+			self.Printf(" (*) %x", addr).Endl()
 
 			// Create a new contract
-			contract := vm.state.NewStateObject(addr)
+			contract := self.env.State().NewStateObject(addr)
 			if contract.Amount.Cmp(value) >= 0 {
 				closure.object.SubAmount(value)
 				contract.AddAmount(value)
@@ -715,10 +705,10 @@ func (vm *Vm) RunClosure(closure *Closure) (ret []byte, err error) {
 				closure.UseGas(closure.Gas)
 
 				// Create the closure
-				c := NewClosure(closure, contract, initCode, vm.state, gas, closure.Price)
+				c := NewClosure(closure, contract, initCode, gas, closure.Price)
 				// Call the closure and set the return value as
 				// main script.
-				contract.script, err = Call(vm, c, nil)
+				contract.Code, _, err = c.Call(self, nil)
 			} else {
 				err = fmt.Errorf("Insufficient funds to transfer value. Req %v, has %v", value, closure.object.Amount)
 			}
@@ -727,23 +717,23 @@ func (vm *Vm) RunClosure(closure *Closure) (ret []byte, err error) {
 				stack.Push(ethutil.BigFalse)
 
 				// Revert the state as it was before.
-				vm.state.Set(snapshot)
+				self.env.State().Set(snapshot)
 
-				vm.Printf("CREATE err %v", err)
+				self.Printf("CREATE err %v", err)
 			} else {
 				stack.Push(ethutil.BigD(addr))
-				vm.Printf("CREATE success")
+				self.Printf("CREATE success")
 			}
-			vm.Endl()
+			self.Endl()
 
 			// Debug hook
-			if vm.Dbg != nil {
-				vm.Dbg.SetCode(closure.Script)
+			if self.Dbg != nil {
+				self.Dbg.SetCode(closure.Code)
 			}
 		case CALL:
 			require(7)
 
-			vm.Endl()
+			self.Endl()
 
 			gas := stack.Pop()
 			// Pop gas and value of the stack.
@@ -759,27 +749,27 @@ func (vm *Vm) RunClosure(closure *Closure) (ret []byte, err error) {
 			if closure.object.Amount.Cmp(value) < 0 {
 				vmlogger.Debugf("Insufficient funds to transfer value. Req %v, has %v", value, closure.object.Amount)
 
-				closure.ReturnGas(gas, nil, nil)
+				closure.ReturnGas(gas, nil)
 
 				stack.Push(ethutil.BigFalse)
 			} else {
-				snapshot := vm.state.Copy()
+				snapshot := self.env.State().Copy()
 
-				stateObject := vm.state.GetOrNewStateObject(addr.Bytes())
+				stateObject := self.env.State().GetOrNewStateObject(addr.Bytes())
 
 				closure.object.SubAmount(value)
 				stateObject.AddAmount(value)
 
 				// Create a new callable closure
-				c := NewClosure(closure, stateObject, stateObject.script, vm.state, gas, closure.Price)
+				c := NewClosure(closure, stateObject, stateObject.Code, gas, closure.Price)
 				// Executer the closure and get the return value (if any)
-				ret, err := Call(vm, c, args)
+				ret, _, err := c.Call(self, args)
 				if err != nil {
 					stack.Push(ethutil.BigFalse)
 
 					vmlogger.Debugf("Closure execution failed. %v\n", err)
 
-					vm.state.Set(snapshot)
+					self.env.State().Set(snapshot)
 				} else {
 					stack.Push(ethutil.BigTrue)
 
@@ -787,8 +777,8 @@ func (vm *Vm) RunClosure(closure *Closure) (ret []byte, err error) {
 				}
 
 				// Debug hook
-				if vm.Dbg != nil {
-					vm.Dbg.SetCode(closure.Script)
+				if self.Dbg != nil {
+					self.Dbg.SetCode(closure.Code)
 				}
 			}
 		case RETURN:
@@ -796,13 +786,13 @@ func (vm *Vm) RunClosure(closure *Closure) (ret []byte, err error) {
 			size, offset := stack.Popn()
 			ret := mem.Get(offset.Int64(), size.Int64())
 
-			vm.Printf(" => (%d) 0x%x", len(ret), ret).Endl()
+			self.Printf(" => (%d) 0x%x", len(ret), ret).Endl()
 
 			return closure.Return(ret), nil
 		case SUICIDE:
 			require(1)
 
-			receiver := vm.state.GetOrNewStateObject(stack.Pop().Bytes())
+			receiver := self.env.State().GetOrNewStateObject(stack.Pop().Bytes())
 
 			receiver.AddAmount(closure.object.Amount)
 
@@ -810,30 +800,29 @@ func (vm *Vm) RunClosure(closure *Closure) (ret []byte, err error) {
 
 			fallthrough
 		case STOP: // Stop the closure
-			vm.Endl()
+			self.Endl()
 
 			return closure.Return(nil), nil
 		default:
 			vmlogger.Debugf("(pc) %-3v Invalid opcode %x\n", pc, op)
-			fmt.Println(Code(closure.Script))
 
 			return closure.Return(nil), fmt.Errorf("Invalid opcode %x", op)
 		}
 
 		pc.Add(pc, ethutil.Big1)
 
-		vm.Endl()
+		self.Endl()
 
-		if vm.Dbg != nil {
-			for _, instrNo := range vm.Dbg.BreakPoints() {
+		if self.Dbg != nil {
+			for _, instrNo := range self.Dbg.BreakPoints() {
 				if pc.Cmp(big.NewInt(instrNo)) == 0 {
-					vm.Stepping = true
+					self.Stepping = true
 
-					if !vm.Dbg.BreakHook(prevStep, op, mem, stack, closure.Object()) {
+					if !self.Dbg.BreakHook(prevStep, op, mem, stack, closure.Object()) {
 						return nil, nil
 					}
-				} else if vm.Stepping {
-					if !vm.Dbg.StepHook(prevStep, op, mem, stack, closure.Object()) {
+				} else if self.Stepping {
+					if !self.Dbg.StepHook(prevStep, op, mem, stack, closure.Object()) {
 						return nil, nil
 					}
 				}
@@ -842,3 +831,20 @@ func (vm *Vm) RunClosure(closure *Closure) (ret []byte, err error) {
 
 	}
 }
+
+func (self *Vm) Printf(format string, v ...interface{}) *Vm {
+	if self.Verbose && self.logTy == LogTyPretty {
+		self.logStr += fmt.Sprintf(format, v...)
+	}
+
+	return self
+}
+
+func (self *Vm) Endl() *Vm {
+	if self.Verbose && self.logTy == LogTyPretty {
+		vmlogger.Debugln(self.logStr)
+		self.logStr = ""
+	}
+
+	return self
+}
diff --git a/ethvm/vm_test.go b/ethvm/vm_test.go
new file mode 100644
index 000000000..501d0c284
--- /dev/null
+++ b/ethvm/vm_test.go
@@ -0,0 +1,45 @@
+package ethvm
+
+import (
+	"fmt"
+	"github.com/ethereum/eth-go/ethdb"
+	"github.com/ethereum/eth-go/ethlog"
+	"github.com/ethereum/eth-go/ethstate"
+	"github.com/ethereum/eth-go/ethutil"
+	"log"
+	"math/big"
+	"os"
+	"testing"
+)
+
+type TestEnv struct {
+}
+
+func (self TestEnv) Origin() []byte         { return nil }
+func (self TestEnv) BlockNumber() *big.Int  { return nil }
+func (self TestEnv) PrevHash() []byte       { return nil }
+func (self TestEnv) Coinbase() []byte       { return nil }
+func (self TestEnv) Time() int64            { return 0 }
+func (self TestEnv) Difficulty() *big.Int   { return nil }
+func (self TestEnv) Value() *big.Int        { return nil }
+func (self TestEnv) State() *ethstate.State { return nil }
+
+func TestVm(t *testing.T) {
+	ethlog.AddLogSystem(ethlog.NewStdLogSystem(os.Stdout, log.LstdFlags, ethlog.LogLevel(4)))
+
+	db, _ := ethdb.NewMemDatabase()
+	ethutil.ReadConfig(".ethtest", "/tmp/ethtest", "")
+	ethutil.Config.Db = db
+
+	stateObject := ethstate.NewStateObject([]byte{'j', 'e', 'f', 'f'})
+	callerClosure := NewClosure(stateObject, stateObject, []byte{0x60, 0x01}, big.NewInt(1000000), big.NewInt(0))
+
+	vm := New(TestEnv{})
+	vm.Verbose = true
+
+	ret, _, e := callerClosure.Call(vm, nil)
+	if e != nil {
+		fmt.Println("error", e)
+	}
+	fmt.Println(ret)
+}
diff --git a/peer.go b/peer.go
index 89032364e..c73617ed5 100644
--- a/peer.go
+++ b/peer.go
@@ -122,9 +122,6 @@ type Peer struct {
 
 	// Last received pong message
 	lastPong int64
-	// Indicates whether a MsgGetPeersTy was requested of the peer
-	// this to prevent receiving false peers.
-	requestedPeerList bool
 
 	host []byte
 	port uint16
@@ -180,10 +177,9 @@ func NewOutboundPeer(addr string, ethereum *Ethereum, caps Caps) *Peer {
 
 	// Set up the connection in another goroutine so we don't block the main thread
 	go func() {
-		conn, err := net.DialTimeout("tcp", addr, 10*time.Second)
-
+		conn, err := p.Connect(addr)
 		if err != nil {
-			peerlogger.Debugln("Connection to peer failed", err)
+			peerlogger.Debugln("Connection to peer failed. Giving up.", err)
 			p.Stop()
 			return
 		}
@@ -199,6 +195,21 @@ func NewOutboundPeer(addr string, ethereum *Ethereum, caps Caps) *Peer {
 	return p
 }
 
+func (self *Peer) Connect(addr string) (conn net.Conn, err error) {
+	for attempts := 0; attempts < 5; attempts++ {
+		conn, err = net.DialTimeout("tcp", addr, 10*time.Second)
+		if err != nil {
+			peerlogger.Debugf("Peer connection failed. Retrying (%d/5)\n", attempts+1)
+			continue
+		}
+
+		// Success
+		return
+	}
+
+	return
+}
+
 // Getters
 func (p *Peer) PingTime() string {
 	return p.pingTime.String()
@@ -463,30 +474,21 @@ func (p *Peer) HandleInbound() {
 					p.ethereum.TxPool().QueueTransaction(tx)
 				}
 			case ethwire.MsgGetPeersTy:
-				// Flag this peer as a 'requested of new peers' this to
-				// prevent malicious peers being forced.
-				p.requestedPeerList = true
 				// Peer asked for list of connected peers
 				p.pushPeers()
 			case ethwire.MsgPeersTy:
 				// Received a list of peers (probably because MsgGetPeersTy was send)
-				// Only act on message if we actually requested for a peers list
-				if p.requestedPeerList {
-					data := msg.Data
-					// Create new list of possible peers for the ethereum to process
-					peers := make([]string, data.Len())
-					// Parse each possible peer
-					for i := 0; i < data.Len(); i++ {
-						value := data.Get(i)
-						peers[i] = unpackAddr(value.Get(0), value.Get(1).Uint())
-					}
-
-					// Connect to the list of peers
-					p.ethereum.ProcessPeerList(peers)
-					// Mark unrequested again
-					p.requestedPeerList = false
-
+				data := msg.Data
+				// Create new list of possible peers for the ethereum to process
+				peers := make([]string, data.Len())
+				// Parse each possible peer
+				for i := 0; i < data.Len(); i++ {
+					value := data.Get(i)
+					peers[i] = unpackAddr(value.Get(0), value.Get(1).Uint())
 				}
+
+				// Connect to the list of peers
+				p.ethereum.ProcessPeerList(peers)
 			case ethwire.MsgGetChainTy:
 				var parent *ethchain.Block
 				// Length minus one since the very last element in the array is a count
@@ -698,11 +700,13 @@ func (p *Peer) handleHandshake(msg *ethwire.Msg) {
 
 	ethlogger.Infof("Added peer (%s) %d / %d\n", p.conn.RemoteAddr(), p.ethereum.Peers().Len(), p.ethereum.MaxPeers)
 
-	// Catch up with the connected peer
-	if !p.ethereum.IsUpToDate() {
-		peerlogger.Debugln("Already syncing up with a peer; sleeping")
-		time.Sleep(10 * time.Second)
-	}
+	/*
+		// Catch up with the connected peer
+		if !p.ethereum.IsUpToDate() {
+			peerlogger.Debugln("Already syncing up with a peer; sleeping")
+			time.Sleep(10 * time.Second)
+		}
+	*/
 	p.SyncWithPeerToLastKnown()
 
 	peerlogger.Debugln(p)