add tx indexer routes

node/setup.go

@@ -97,44 +97,10 @@ func createAndStartIndexerService(
 		sinks[sl] = true
 	}
 
-loop:
-	for k := range sinks {
-		switch k {
-		case string(indexer.NULL):
-			// When we see null in the config, the eventsinks will be reset with the
-			// nullEventSink.
-			eventSinks = []indexer.EventSink{null.NewEventSink()}
-			break loop
-
-		case string(indexer.KV):
-			store, err := dbProvider(&cfg.DBContext{ID: "tx_index", Config: config})
-			if err != nil {
-				return nil, nil, err
-			}
-
-			eventSinks = append(eventSinks, kv.NewEventSink(store))
-
-		case string(indexer.PSQL):
-			conn := config.TxIndex.PsqlConn
-			if conn == "" {
-				return nil, nil, errors.New("the psql connection settings cannot be empty")
-			}
-
-			es, _, err := psql.NewEventSink(conn, chainID)
-			if err != nil {
-				return nil, nil, err
-			}
-			eventSinks = append(eventSinks, es)
-
-		default:
-			return nil, nil, errors.New("unsupported event sink type")
-		}
+	eventSinks, err := indexerSinksFromConfig(config, dbProvider, chainID)
+	if err != nil {
+		return nil, nil, err
 	}
-
-	if len(eventSinks) == 0 {
-		eventSinks = []indexer.EventSink{null.NewEventSink()}
-	}
-
 	indexerService := indexer.NewIndexerService(eventSinks, eventBus)
 	indexerService.SetLogger(logger.With("module", "txindex"))
 
@@ -145,6 +111,57 @@ loop:
 	return indexerService, eventSinks, nil
 }
 
+func indexerSinksFromConfig(config *cfg.Config, dbProvider cfg.DBProvider, chainID string) ([]indexer.EventSink, error) {
+	if len(config.TxIndex.Indexer) == 0 {
+		return []indexer.EventSink{null.NewEventSink()}, nil
+	}
+
+	// check for duplicated sinks
+	sinks := map[string]struct{}{}
+	for _, s := range config.TxIndex.Indexer {
+		sl := strings.ToLower(s)
+		if _, ok := sinks[sl]; ok {
+			return nil, errors.New("found duplicated sinks, please check the tx-index section in the config.toml")
+		}
+		sinks[sl] = struct{}{}
+	}
+
+	eventSinks := []indexer.EventSink{}
+	for k := range sinks {
+		switch k {
+		case string(indexer.NULL):
+			// When we see null in the config, the eventsinks will be reset with the
+			// nullEventSink.
+			return []indexer.EventSink{null.NewEventSink()}, nil
+
+		case string(indexer.KV):
+			store, err := dbProvider(&cfg.DBContext{ID: "tx_index", Config: config})
+			if err != nil {
+				return nil, err
+			}
+
+			eventSinks = append(eventSinks, kv.NewEventSink(store))
+
+		case string(indexer.PSQL):
+			conn := config.TxIndex.PsqlConn
+			if conn == "" {
+				return nil, errors.New("the psql connection settings cannot be empty")
+			}
+
+			es, _, err := psql.NewEventSink(conn, chainID)
+			if err != nil {
+				return nil, err
+			}
+
+			eventSinks = append(eventSinks, es)
+
+		default:
+			return nil, errors.New("unsupported event sink type")
+		}
+	}
+	return eventSinks, nil
+}
+
 func doHandshake(
 	stateStore sm.Store,
 	state sm.State,