diff --git a/core/blockchain.go b/core/blockchain.go
index c5b304ff35..0167faf41a 100644
--- a/core/blockchain.go
+++ b/core/blockchain.go
@@ -545,6 +545,11 @@ func (self *BlockChain) GetBlockByNumber(number uint64) *types.Block {
 	return self.GetBlock(hash, number)
 }
 
+// IsCanonChainBlock checks whether the given block is in the current canonical chain.
+func (self *BlockChain) IsCanonChainBlock(number uint64, hash common.Hash) bool {
+	return number < uint64(self.currentBlock.Number().Int64()) && GetCanonicalHash(self.chainDb, number) == hash
+}
+
 // [deprecated by eth/62]
 // GetBlocksFromHash returns the block corresponding to hash and up to n-1 ancestors.
 func (self *BlockChain) GetBlocksFromHash(hash common.Hash, n int) (blocks []*types.Block) {
diff --git a/core/chain_makers.go b/core/chain_makers.go
index e3ad9cda08..b361a69a31 100644
--- a/core/chain_makers.go
+++ b/core/chain_makers.go
@@ -105,7 +105,7 @@ func (b *BlockGen) AddTx(tx *types.Transaction) {
 	if b.gasPool == nil {
 		b.SetCoinbase(common.Address{})
 	}
-	b.statedb.StartRecord(tx.Hash(), common.Hash{}, len(b.txs))
+	b.statedb.SetTxContext(common.Hash{}, b.header.Number.Uint64(), tx.Hash(), len(b.txs), nil)
 	receipt, _, _, err := ApplyTransaction(MakeChainConfig(), nil, b.gasPool, b.statedb, b.header, tx, b.header.GasUsed, vm.Config{})
 	if err != nil {
 		panic(err)
diff --git a/core/state/iterator_test.go b/core/state/iterator_test.go
index aa05c5dfe7..dc16523eff 100644
--- a/core/state/iterator_test.go
+++ b/core/state/iterator_test.go
@@ -47,7 +47,7 @@ func TestNodeIteratorCoverage(t *testing.T) {
 		}
 	}
 	for _, key := range db.(*ethdb.MemDatabase).Keys() {
-		if bytes.HasPrefix(key, []byte("secure-key-")) {
+		if bytes.HasPrefix(key, []byte("secure-key-")) || bytes.HasPrefix(key, CachePrefix) {
 			continue
 		}
 		if _, ok := hashes[common.BytesToHash(key)]; !ok {
diff --git a/core/state/statedb.go b/core/state/statedb.go
index eef2f38d50..dc5323f2b1 100644
--- a/core/state/statedb.go
+++ b/core/state/statedb.go
@@ -41,6 +41,8 @@ var StartingNonce uint64
 // Trie cache generation limit after which to evic trie nodes from memory.
 var MaxTrieCacheGen = uint16(120)
 
+var CachePrefix = []byte("accounthashcache:")
+
 const (
 	// Number of past tries to keep. This value is chosen such that
 	// reasonable chain reorg depths will hit an existing trie.
@@ -94,17 +96,19 @@ func New(root common.Hash, db ethdb.Database) (*StateDB, error) {
 	if err != nil {
 		return nil, err
 	}
+
 	csc, _ := lru.New(codeSizeCacheSize)
-	return &StateDB{
+	ret := &StateDB{
 		db:                db,
 		trie:              tr,
-		storage:           trie.NewSecure(tr, db),
 		codeSizeCache:     csc,
 		stateObjects:      make(map[common.Address]*StateObject),
 		stateObjectsDirty: make(map[common.Address]struct{}),
 		refund:            new(big.Int),
 		logs:              make(map[common.Hash]vm.Logs),
-	}, nil
+	}
+	ret.SetTxContext(common.Hash{}, 0, common.Hash{}, 0, nil)
+	return ret, nil
 }
 
 // New creates a new statedb by reusing any journalled tries to avoid costly
@@ -117,16 +121,17 @@ func (self *StateDB) New(root common.Hash) (*StateDB, error) {
 	if err != nil {
 		return nil, err
 	}
-	return &StateDB{
+	ret := &StateDB{
 		db:                self.db,
 		trie:              tr,
-		storage:           trie.NewSecure(tr, self.db),
 		codeSizeCache:     self.codeSizeCache,
 		stateObjects:      make(map[common.Address]*StateObject),
 		stateObjectsDirty: make(map[common.Address]struct{}),
 		refund:            new(big.Int),
 		logs:              make(map[common.Hash]vm.Logs),
-	}, nil
+	}
+	ret.SetTxContext(common.Hash{}, 0, common.Hash{}, 0, nil)
+	return ret, nil
 }
 
 // Reset clears out all emphemeral state objects from the state db, but keeps
@@ -140,7 +145,6 @@ func (self *StateDB) Reset(root common.Hash) error {
 		return err
 	}
 	self.trie = tr
-	self.storage = trie.NewSecure(tr, self.db)
 	self.stateObjects = make(map[common.Address]*StateObject)
 	self.stateObjectsDirty = make(map[common.Address]struct{})
 	self.thash = common.Hash{}
@@ -149,6 +153,8 @@ func (self *StateDB) Reset(root common.Hash) error {
 	self.logs = make(map[common.Hash]vm.Logs)
 	self.logSize = 0
 	self.clearJournalAndRefund()
+	self.SetTxContext(common.Hash{}, 0, common.Hash{}, 0, nil)
+
 
 	return nil
 }
@@ -177,10 +183,16 @@ func (self *StateDB) pushTrie(t *trie.Trie) {
 	}
 }
 
-func (self *StateDB) StartRecord(thash, bhash common.Hash, ti int) {
-	self.thash = thash
-	self.bhash = bhash
-	self.txIndex = ti
+func (self *StateDB) SetTxContext(blockHash common.Hash, blockNum uint64, txHash common.Hash, txIndex int, validator trie.CacheValidator) {
+	self.bhash = blockHash
+	self.thash = txHash
+	self.txIndex = txIndex
+
+	if validator == nil {
+		validator = &trie.NullCacheValidator{}
+	}
+	storage := trie.NewDirectCache(self.trie, self.db, CachePrefix, validator, true)
+	self.storage = trie.NewSecure(storage, self.db)
 }
 
 func (self *StateDB) AddLog(log *vm.Log) {
diff --git a/core/state_processor.go b/core/state_processor.go
index fd8e9762e9..8722e3c342 100644
--- a/core/state_processor.go
+++ b/core/state_processor.go
@@ -71,7 +71,7 @@ func (p *StateProcessor) Process(block *types.Block, statedb *state.StateDB, cfg
 	}
 	// Iterate over and process the individual transactions
 	for i, tx := range block.Transactions() {
-		statedb.StartRecord(tx.Hash(), block.Hash(), i)
+		statedb.SetTxContext(block.Hash(), block.NumberU64(), tx.Hash(), i, p.bc)
 		receipt, logs, _, err := ApplyTransaction(p.config, p.bc, gp, statedb, header, tx, totalUsedGas, cfg)
 		if err != nil {
 			return nil, nil, totalUsedGas, err
diff --git a/miner/worker.go b/miner/worker.go
index 89064c3b95..7826605238 100644
--- a/miner/worker.go
+++ b/miner/worker.go
@@ -583,7 +583,7 @@ func (env *Work) commitTransactions(mux *event.TypeMux, txs *types.TransactionsB
 			continue
 		}
 		// Start executing the transaction
-		env.state.StartRecord(tx.Hash(), common.Hash{}, env.tcount)
+		env.state.SetTxContext(common.Hash{}, env.header.Number.Uint64(), tx.Hash(), env.tcount, bc)
 
 		err, logs := env.commitTransaction(tx, bc, gp)
 		switch {
diff --git a/trie/directcache.go b/trie/directcache.go
index 6f87ba5ef8..25d3d6e305 100644
--- a/trie/directcache.go
+++ b/trie/directcache.go
@@ -52,13 +52,17 @@ type DirectCache struct {
 	dirty     map[string]bool
 }
 
-func NewDirectCache(s Storage, db Database, keyPrefix []byte, blockNum uint64, blockHash common.Hash, validator CacheValidator, complete bool) *DirectCache {
+type NullCacheValidator struct {}
+
+func (cv *NullCacheValidator) IsCanonChainBlock(num uint64, hash common.Hash) bool {
+	return false
+}
+
+func NewDirectCache(s Storage, db Database, keyPrefix []byte, validator CacheValidator, complete bool) *DirectCache {
 	return &DirectCache{
 		storage: s,
 		db: db,
 		keyPrefix: keyPrefix,
-		blockNum: blockNum,
-		blockHash: blockHash,
 		validator: validator,
 		complete: complete,
 		dirty: make(map[string]bool),
@@ -83,6 +87,7 @@ func (dc *DirectCache) Get(key []byte) []byte {
 }
 
 func (dc *DirectCache) TryGet(key []byte) ([]byte, error) {
+	return dc.storage.TryGet(key)
 	start := time.Now()
 
 	// Use the underlying object for dirty keys
diff --git a/trie/trie_test.go b/trie/trie_test.go
index bb2861cf19..0e11bf931d 100644
--- a/trie/trie_test.go
+++ b/trie/trie_test.go
@@ -583,14 +583,14 @@ func tempDB() (string, Database) {
 	return dir, db
 }
 
-func getString(trie Trie, k string) []byte {
+func getString(trie *Trie, k string) []byte {
 	return trie.Get([]byte(k))
 }
 
-func updateString(trie Trie, k, v string) {
+func updateString(trie *Trie, k, v string) {
 	trie.Update([]byte(k), []byte(v))
 }
 
-func deleteString(trie Trie, k string) {
+func deleteString(trie *Trie, k string) {
 	trie.Delete([]byte(k))
 }