fixes from Bucky's review 2

rpc/client/httpclient.go

@@ -311,13 +311,13 @@ func (w *WSEvents) eventListener() {
 				continue
 			}
 			result := new(ctypes.ResultEvent)
-			err = json.Unmarshal(*resp.Result, result)
+			err := json.Unmarshal(*resp.Result, result)
 			if err != nil {
 				// ignore silently (eg. subscribe, unsubscribe and maybe other events)
 				// TODO: ?
 				continue
 			}
-			if ch := getSubscription(result.Query); ch != nil {
+			if ch := w.getSubscription(result.Query); ch != nil {
 				ch <- result.Data
 			}
 		case <-w.quit:

rpc/core/mempool.go

@@ -158,8 +158,8 @@ func BroadcastTxCommit(tx types.Tx) (*ctypes.ResultBroadcastTxCommit, error) {
 	err := eventBus.Subscribe(ctx, "mempool", q, deliverTxResCh)
 	if err != nil {
 		err = errors.Wrap(err, "failed to subscribe to tx")
-		logger.Error("Error broadcasting transaction", "err", err)
-		return nil, fmt.Errorf("Error broadcasting transaction: %v", err)
+		logger.Error("Error on broadcastTxCommit", "err", err)
+		return nil, fmt.Errorf("Error on broadcastTxCommit: %v", err)
 	}
 	defer eventBus.Unsubscribe(context.Background(), "mempool", q)
 
@@ -169,8 +169,8 @@ func BroadcastTxCommit(tx types.Tx) (*ctypes.ResultBroadcastTxCommit, error) {
 		checkTxResCh <- res
 	})
 	if err != nil {
-		logger.Error("Error broadcasting transaction", "err", err)
-		return nil, fmt.Errorf("Error broadcasting transaction: %v", err)
+		logger.Error("Error on broadcastTxCommit", "err", err)
+		return nil, fmt.Errorf("Error on broadcastTxCommit: %v", err)
 	}
 	checkTxRes := <-checkTxResCh
 	checkTxR := checkTxRes.GetCheckTx()

rpc/core/pipe.go

@@ -50,7 +50,7 @@ var (
 	addrBook         *p2p.AddrBook
 	txIndexer        txindex.TxIndexer
 	consensusReactor *consensus.ConsensusReactor
-	eventBus         *types.EventBus
+	eventBus         *types.EventBus // thread safe
 
 	logger log.Logger
 )