[staking] save owner list after PersistStakingPatchBlock

Author: dustinxie

action/protocol/staking/handlers.go

@@ -682,7 +682,10 @@ func (p *Protocol) handleCandidateRegister(ctx context.Context, act *action.Cand
 	if err := csm.Upsert(c); err != nil {
 		return log, nil, csmErrorToHandleError(owner.String(), err)
 	}
-	csm.DirtyView().candCenter.base.recordOwner(c)
+	height, _ := csm.SM().Height()
+	if p.needToWriteCandsMap(height) {
+		csm.DirtyView().candCenter.base.recordOwner(c)
+	}
 
 	// update bucket pool
 	if err := csm.DebitBucketPool(act.Amount(), true); err != nil {
@@ -762,7 +765,10 @@ func (p *Protocol) handleCandidateUpdate(ctx context.Context, act *action.Candid
 	if err := csm.Upsert(c); err != nil {
 		return log, csmErrorToHandleError(c.Owner.String(), err)
 	}
-	csm.DirtyView().candCenter.base.recordOwner(c)
+	height, _ := csm.SM().Height()
+	if p.needToWriteCandsMap(height) {
+		csm.DirtyView().candCenter.base.recordOwner(c)
+	}
 
 	log.AddAddress(actCtx.Caller)
 	return log, nil