make sig verification in the same thread (#3537)

consensus/consensus_v2.go

@@ -555,7 +555,6 @@ func (consensus *Consensus) preCommitAndPropose(blk *types.Block) error {
 		return err
 	}
 
-	go func() {
 	msgToSend, FBFTMsg :=
 		network.Bytes,
 		network.FBFTMsg
@@ -563,9 +562,10 @@ func (consensus *Consensus) preCommitAndPropose(blk *types.Block) error {
 	consensus.FBFTLog.AddVerifiedMessage(FBFTMsg)
 
 	if err := consensus.verifyLastCommitSig(bareMinimumCommit, blk); err != nil {
-			consensus.getLogger().Warn().Err(err).Msg("[preCommitAndPropose] failed verifying last commit sig")
-			return
+		return errors.Wrap(err, "[preCommitAndPropose] failed verifying last commit sig")
 	}
+
+	go func() {
 		blk.SetCurrentCommitSig(bareMinimumCommit)
 
 		if _, err := consensus.Blockchain.InsertChain([]*types.Block{blk}, true); err != nil {