preserve vdb changes

Author: Jeannette

core/genesis.go

@@ -116,7 +116,7 @@ func (ga *GenesisAlloc) flush(db ethdb.Database) error {
 			statedb.SetState(addr, key, value)
 		}
 	}
-	root, err := statedb.Commit(false)
+	root, _, err := statedb.Commit(false)
 	if err != nil {
 		return err
 	}

eth/filters/filter_system.go

@@ -66,6 +66,7 @@ type Backend interface {
 	SubscribeRemovedLogsEvent(ch chan<- core.RemovedLogsEvent) event.Subscription
 	SubscribeLogsEvent(ch chan<- []*types.Log) event.Subscription
 	SubscribePendingLogsEvent(ch chan<- []*types.Log) event.Subscription
+	SubscribeStateChangeEvent(ch chan<- core.StateChangeEvent) event.Subscription
 
 	BloomStatus() (uint64, uint64)
 	ServiceFilter(ctx context.Context, session *bloombits.MatcherSession)
@@ -207,6 +208,7 @@ func NewEventSystem(sys *FilterSystem, lightMode bool) *EventSystem {
 		rmLogsCh:      make(chan core.RemovedLogsEvent, rmLogsChanSize),
 		pendingLogsCh: make(chan []*types.Log, logsChanSize),
 		chainCh:       make(chan core.ChainEvent, chainEvChanSize),
+		stateChangeEventChan: make(chan core.StateChangeEvent, stateChangeChanSize),
 	}
 
 	// Subscribe events