diff --git a/core/state/state_object.go b/core/state/state_object.go
index 0af0fbd5ab..69c64ae404 100644
--- a/core/state/state_object.go
+++ b/core/state/state_object.go
@@ -87,10 +87,6 @@ type StateObject struct {
 	dirty   bool
 }
 
-func (self *StateObject) Reset() {
-	self.storage = make(Storage)
-}
-
 func NewStateObject(address common.Address, db common.Database) *StateObject {
 	object := &StateObject{db: db, address: address, balance: new(big.Int), gasPool: new(big.Int), dirty: true}
 	object.trie = trie.NewSecure((common.Hash{}).Bytes(), db)
@@ -184,14 +180,6 @@ func (self *StateObject) Update() {
 	}
 }
 
-func (c *StateObject) GetInstr(pc *big.Int) *common.Value {
-	if int64(len(c.code)-1) < pc.Int64() {
-		return common.NewValue(0)
-	}
-
-	return common.NewValueFromBytes([]byte{c.code[pc.Int64()]})
-}
-
 func (c *StateObject) AddBalance(amount *big.Int) {
 	c.SetBalance(new(big.Int).Add(c.balance, amount))
 
@@ -268,10 +256,6 @@ func (self *StateObject) Copy() *StateObject {
 	return stateObject
 }
 
-func (self *StateObject) Set(stateObject *StateObject) {
-	*self = *stateObject
-}
-
 //
 // Attribute accessors
 //
@@ -280,20 +264,11 @@ func (self *StateObject) Balance() *big.Int {
 	return self.balance
 }
 
-func (c *StateObject) N() *big.Int {
-	return big.NewInt(int64(c.nonce))
-}
-
 // Returns the address of the contract/account
 func (c *StateObject) Address() common.Address {
 	return c.address
 }
 
-// Returns the initialization Code
-func (c *StateObject) Init() Code {
-	return c.initCode
-}
-
 func (self *StateObject) Trie() *trie.SecureTrie {
 	return self.trie
 }
@@ -311,11 +286,6 @@ func (self *StateObject) SetCode(code []byte) {
 	self.dirty = true
 }
 
-func (self *StateObject) SetInitCode(code []byte) {
-	self.initCode = code
-	self.dirty = true
-}
-
 func (self *StateObject) SetNonce(nonce uint64) {
 	self.nonce = nonce
 	self.dirty = true
@@ -354,19 +324,6 @@ func (c *StateObject) CodeHash() common.Bytes {
 	return crypto.Sha3(c.code)
 }
 
-func (c *StateObject) RlpDecode(data []byte) {
-	decoder := common.NewValueFromBytes(data)
-	c.nonce = decoder.Get(0).Uint()
-	c.balance = decoder.Get(1).BigInt()
-	c.trie = trie.NewSecure(decoder.Get(2).Bytes(), c.db)
-	c.storage = make(map[string]common.Hash)
-	c.gasPool = new(big.Int)
-
-	c.codeHash = decoder.Get(3).Bytes()
-
-	c.code, _ = c.db.Get(c.codeHash)
-}
-
 // Storage change object. Used by the manifest for notifying changes to
 // the sub channels.
 type StorageState struct {
diff --git a/core/state/statedb.go b/core/state/statedb.go
index 577f7162eb..b754f08877 100644
--- a/core/state/statedb.go
+++ b/core/state/statedb.go
@@ -18,7 +18,6 @@
 package state
 
 import (
-	"bytes"
 	"math/big"
 
 	"github.com/ethereum/go-ethereum/common"
@@ -276,10 +275,6 @@ func (self *StateDB) CreateAccount(addr common.Address) *StateObject {
 // Setting, copying of the state methods
 //
 
-func (s *StateDB) Cmp(other *StateDB) bool {
-	return bytes.Equal(s.trie.Root(), other.trie.Root())
-}
-
 func (self *StateDB) Copy() *StateDB {
 	state := New(common.Hash{}, self.db)
 	state.trie = self.trie
@@ -311,22 +306,6 @@ func (s *StateDB) Root() common.Hash {
 	return common.BytesToHash(s.trie.Root())
 }
 
-func (s *StateDB) Trie() *trie.SecureTrie {
-	return s.trie
-}
-
-// Resets the trie and all siblings
-func (s *StateDB) Reset() {
-	s.trie.Reset()
-
-	// Reset all nested states
-	for _, stateObject := range s.stateObjects {
-		stateObject.Reset()
-	}
-
-	s.Empty()
-}
-
 // Syncs the trie and all siblings
 func (s *StateDB) Sync() {
 	// Sync all nested states
diff --git a/core/types/transaction.go b/core/types/transaction.go
index 28a7e02b31..8260d74230 100644
--- a/core/types/transaction.go
+++ b/core/types/transaction.go
@@ -33,10 +33,6 @@ import (
 
 var ErrInvalidSig = errors.New("invalid v, r, s values")
 
-func IsContractAddr(addr []byte) bool {
-	return len(addr) == 0
-}
-
 type Transaction struct {
 	data txdata
 	// caches
diff --git a/core/vm/errors.go b/core/vm/errors.go
index 24567e9a1e..e2fc84065e 100644
--- a/core/vm/errors.go
+++ b/core/vm/errors.go
@@ -25,20 +25,3 @@ import (
 
 var OutOfGasError = errors.New("Out of gas")
 var DepthError = fmt.Errorf("Max call depth exceeded (%d)", params.CallCreateDepth)
-
-type StackError struct {
-	req, has int
-}
-
-func StackErr(req, has int) StackError {
-	return StackError{req, has}
-}
-
-func (self StackError) Error() string {
-	return fmt.Sprintf("stack error! require %v, have %v", self.req, self.has)
-}
-
-func IsStackErr(err error) bool {
-	_, ok := err.(StackError)
-	return ok
-}