diff options
| -rw-r--r-- | ethutil/trie.go | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/ethutil/trie.go b/ethutil/trie.go index 7140a1b36..95abca602 100644 --- a/ethutil/trie.go +++ b/ethutil/trie.go @@ -98,22 +98,25 @@ func (cache *Cache) Undo() { // Please note that the data isn't persisted unless `Sync` is // explicitly called. type Trie struct { - Root interface{} + prevRoot interface{} + Root interface{} //db Database cache *Cache } func NewTrie(db Database, Root interface{}) *Trie { - return &Trie{cache: NewCache(db), Root: Root} + return &Trie{cache: NewCache(db), Root: Root, prevRoot: Root} } // Save the cached value to the database. func (t *Trie) Sync() { t.cache.Commit() + t.prevRoot = t.Root } func (t *Trie) Undo() { t.cache.Undo() + t.Root = t.prevRoot } /* @@ -181,6 +184,7 @@ func (t *Trie) GetNode(node interface{}) *Value { } func (t *Trie) UpdateState(node interface{}, key []int, value string) interface{} { + if value != "" { return t.InsertState(node, key, value) } else { @@ -241,6 +245,7 @@ func (t *Trie) InsertState(node interface{}, key []int, value interface{}) inter // Check for "special" 2 slice type node if currentNode.Len() == 2 { // Decode the key + k := CompactDecode(currentNode.Get(0).Str()) v := currentNode.Get(1).Raw() |