aboutsummaryrefslogtreecommitdiffstats
path: root/core/state/statedb.go
diff options
context:
space:
mode:
Diffstat (limited to 'core/state/statedb.go')
-rw-r--r--core/state/statedb.go22
1 files changed, 22 insertions, 0 deletions
diff --git a/core/state/statedb.go b/core/state/statedb.go
index 22ffa36a0..cfcb82d97 100644
--- a/core/state/statedb.go
+++ b/core/state/statedb.go
@@ -68,6 +68,28 @@ func New(root common.Hash, db ethdb.Database) (*StateDB, error) {
}, nil
}
+// Reset clears out all emphemeral state objects from the state db, but keeps
+// the underlying state trie to avoid reloading data for the next operations.
+func (self *StateDB) Reset(root common.Hash) error {
+ var (
+ err error
+ tr = self.trie
+ )
+ if self.trie.Hash() != root {
+ if tr, err = trie.NewSecure(root, self.db); err != nil {
+ return err
+ }
+ }
+ *self = StateDB{
+ db: self.db,
+ trie: tr,
+ stateObjects: make(map[string]*StateObject),
+ refund: new(big.Int),
+ logs: make(map[common.Hash]vm.Logs),
+ }
+ return nil
+}
+
func (self *StateDB) StartRecord(thash, bhash common.Hash, ti int) {
self.thash = thash
self.bhash = bhash