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authorFelföldi Zsolt <zsfelfoldi@gmail.com>2016-11-28 18:31:15 +0800
committerFelix Lange <fjl@twurst.com>2016-11-28 18:31:15 +0800
commit665bb43a4c9e97d6f23de02575b92156881a2db8 (patch)
tree15ce669f45a49b143d07c0b36da74827b42b4594 /light
parente4bf004560acf18919d5a1b952eeda521ae07aab (diff)
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light: implemented VMState.Empty() (#3357)
Diffstat (limited to 'light')
-rw-r--r--light/state_object.go9
-rw-r--r--light/vm_env.go7
2 files changed, 14 insertions, 2 deletions
diff --git a/light/state_object.go b/light/state_object.go
index 61c3888fe..6161d2dfb 100644
--- a/light/state_object.go
+++ b/light/state_object.go
@@ -201,14 +201,19 @@ func (self *StateObject) Copy() *StateObject {
// Attribute accessors
//
+// empty returns whether the account is considered empty.
+func (self *StateObject) empty() bool {
+ return self.nonce == 0 && self.balance.BitLen() == 0 && bytes.Equal(self.codeHash, emptyCodeHash)
+}
+
// Balance returns the account balance
func (self *StateObject) Balance() *big.Int {
return self.balance
}
// Address returns the address of the contract/account
-func (c *StateObject) Address() common.Address {
- return c.address
+func (self *StateObject) Address() common.Address {
+ return self.address
}
// Code returns the contract code
diff --git a/light/vm_env.go b/light/vm_env.go
index 5d330b072..d4d7bcce7 100644
--- a/light/vm_env.go
+++ b/light/vm_env.go
@@ -263,6 +263,13 @@ func (s *VMState) Exist(addr common.Address) bool {
return res
}
+// Empty returns true if the account at the given address is considered empty
+func (s *VMState) Empty(addr common.Address) bool {
+ so, err := s.state.GetStateObject(s.ctx, addr)
+ s.errHandler(err)
+ return so == nil || so.empty()
+}
+
// HasSuicided returns true if the given account has been marked for deletion
// or false if the account does not exist
func (s *VMState) HasSuicided(addr common.Address) bool {