bug fix use right block to count vote theshold

Author: liam.lai

consensus/XDPoS/engines/engine_v2/vote.go

@@ -76,7 +76,7 @@ func (x *XDPoS_v2) voteHandler(chain consensus.ChainReader, voteMsg *types.Vote)
 	go x.ForensicsProcessor.DetectEquivocationInVotePool(voteMsg, x.votePool)
 	go x.ForensicsProcessor.ProcessVoteEquivocation(chain, x, voteMsg)
 
-	epochInfo, err := x.getEpochSwitchInfo(chain, chain.CurrentHeader(), chain.CurrentHeader().Hash())
+	epochInfo, err := x.getEpochSwitchInfo(chain, nil, voteMsg.ProposedBlockInfo.Hash)
 	if err != nil {
 		log.Error("[voteHandler] Error when getting epoch switch Info", "error", err)
 		return errors.New("fail on voteHandler due to failure in getting epoch switch info")
@@ -175,7 +175,7 @@ func (x *XDPoS_v2) onVotePoolThresholdReached(chain consensus.ChainReader, poole
 		}
 	}
 
-	epochInfo, err := x.getEpochSwitchInfo(chain, chain.CurrentHeader(), chain.CurrentHeader().Hash())
+	epochInfo, err := x.getEpochSwitchInfo(chain, nil, currentVoteMsg.(*types.Vote).ProposedBlockInfo.Hash)
 	if err != nil {
 		log.Error("[voteHandler] Error when getting epoch switch Info", "error", err)
 		return errors.New("fail on voteHandler due to failure in getting epoch switch info")