unified gateway interface

api/gateway/chain/internal/server/internal/serverimp.go

@@ -36,6 +36,7 @@ type Imp struct {
 	app    *grpcapp.App[storage.Repository]
 
 	rpcClients *rpcclient.Clients
+	service    *gatewayservice.Service
 }
 
 type config struct {
@@ -100,6 +101,10 @@ func (i *Imp) Shutdown() {
 		timeout = i.config.Runtime.ShutdownTimeout()
 	}
 
+	if i.service != nil {
+		i.service.Shutdown()
+	}
+
 	ctx, cancel := context.WithTimeout(context.Background(), timeout)
 	defer cancel()
 
@@ -151,7 +156,9 @@ func (i *Imp) Start() error {
 			gatewayservice.WithDriverRegistry(driverRegistry),
 			gatewayservice.WithSettings(cfg.Settings),
 		}
-		return gatewayservice.NewService(logger, repo, producer, opts...), nil
+		svc := gatewayservice.NewService(logger, repo, producer, opts...)
+		i.service = svc
+		return svc, nil
 	}
 
 	app, err := grpcapp.NewApp(i.logger, "chain", cfg.Config, i.debug, repoFactory, serviceFactory)