use common.Hash as the key in secKeyCache map

trie/secure_trie.go

@@ -64,7 +64,7 @@ type StateTrie struct {
 	db               database.NodeDatabase
 	preimages        preimageStore
 	hashKeyBuf       [common.HashLength]byte
-	secKeyCache      map[string][]byte
+	secKeyCache      map[common.Hash][]byte
 	secKeyCacheOwner *StateTrie // Pointer to self, replace the key cache on mismatch
 }
 
@@ -159,7 +159,7 @@ func (t *StateTrie) GetNode(path []byte) ([]byte, int, error) {
 func (t *StateTrie) MustUpdate(key, value []byte) {
 	hk := t.hashKey(key)
 	t.trie.MustUpdate(hk, value)
-	t.getSecKeyCache()[string(hk)] = common.CopyBytes(key)
+	t.getSecKeyCache()[common.Hash(hk)] = common.CopyBytes(key)
 }
 
 // UpdateStorage associates key with value in the trie. Subsequent calls to
@@ -177,7 +177,7 @@ func (t *StateTrie) UpdateStorage(_ common.Address, key, value []byte) error {
 	if err != nil {
 		return err
 	}
-	t.getSecKeyCache()[string(hk)] = common.CopyBytes(key)
+	t.getSecKeyCache()[common.Hash(hk)] = common.CopyBytes(key)
 	return nil
 }
 
@@ -191,7 +191,7 @@ func (t *StateTrie) UpdateAccount(address common.Address, acc *types.StateAccoun
 	if err := t.trie.Update(hk, data); err != nil {
 		return err
 	}
-	t.getSecKeyCache()[string(hk)] = address.Bytes()
+	t.getSecKeyCache()[common.Hash(hk)] = address.Bytes()
 	return nil
 }
 
@@ -203,7 +203,7 @@ func (t *StateTrie) UpdateContractCode(_ common.Address, _ common.Hash, _ []byte
 // will omit any encountered error but just print out an error message.
 func (t *StateTrie) MustDelete(key []byte) {
 	hk := t.hashKey(key)
-	delete(t.getSecKeyCache(), string(hk))
+	delete(t.getSecKeyCache(), common.Hash(hk))
 	t.trie.MustDelete(hk)
 }
 
@@ -212,21 +212,21 @@ func (t *StateTrie) MustDelete(key []byte) {
 // If a node is not found in the database, a MissingNodeError is returned.
 func (t *StateTrie) DeleteStorage(_ common.Address, key []byte) error {
 	hk := t.hashKey(key)
-	delete(t.getSecKeyCache(), string(hk))
+	delete(t.getSecKeyCache(), common.Hash(hk))
 	return t.trie.Delete(hk)
 }
 
 // DeleteAccount abstracts an account deletion from the trie.
 func (t *StateTrie) DeleteAccount(address common.Address) error {
 	hk := t.hashKey(address.Bytes())
-	delete(t.getSecKeyCache(), string(hk))
+	delete(t.getSecKeyCache(), common.Hash(hk))
 	return t.trie.Delete(hk)
 }
 
 // GetKey returns the sha3 preimage of a hashed key that was
 // previously used to store a value.
 func (t *StateTrie) GetKey(shaKey []byte) []byte {
-	if key, ok := t.getSecKeyCache()[string(shaKey)]; ok {
+	if key, ok := t.getSecKeyCache()[common.BytesToHash(shaKey)]; ok {
 		return key
 	}
 	if t.preimages == nil {
@@ -251,13 +251,9 @@ func (t *StateTrie) Commit(collectLeaf bool) (common.Hash, *trienode.NodeSet) {
 	// Write all the pre-images to the actual disk database
 	if len(t.getSecKeyCache()) > 0 {
 		if t.preimages != nil {
-			preimages := make(map[common.Hash][]byte, len(t.secKeyCache))
-			for hk, key := range t.secKeyCache {
-				preimages[common.BytesToHash([]byte(hk))] = key
-			}
-			t.preimages.InsertPreimage(preimages)
+			t.preimages.InsertPreimage(t.secKeyCache)
 		}
-		t.secKeyCache = make(map[string][]byte)
+		t.secKeyCache = make(map[common.Hash][]byte)
 	}
 	// Commit the trie and return its modified nodeset.
 	return t.trie.Commit(collectLeaf)
@@ -306,10 +302,10 @@ func (t *StateTrie) hashKey(key []byte) []byte {
 // getSecKeyCache returns the current secure key cache, creating a new one if
 // ownership changed (i.e. the current secure trie is a copy of another owning
 // the actual cache).
-func (t *StateTrie) getSecKeyCache() map[string][]byte {
+func (t *StateTrie) getSecKeyCache() map[common.Hash][]byte {
 	if t != t.secKeyCacheOwner {
 		t.secKeyCacheOwner = t
-		t.secKeyCache = make(map[string][]byte)
+		t.secKeyCache = make(map[common.Hash][]byte)
 	}
 	return t.secKeyCache
 }