diff options
Diffstat (limited to 'core/state/statedb.go')
-rw-r--r-- | core/state/statedb.go | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/core/state/statedb.go b/core/state/statedb.go index 27bc38373..70673799e 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 |