errCh := make(chan error)

go func(enableUnsafeCORS bool) {
    s.logger.Info("starting API server...", "address", cfg.API.Address)

    if enableUnsafeCORS {
        allowAllCORS := handlers.CORS(handlers.AllowedHeaders([]string{"Content-Type"}))
        errCh <- cmtrpcserver.Serve(s.listener, allowAllCORS(s.Router), cmtlogwrapper.CometLoggerWrapper{Logger: s.logger}, cmtCfg)
    } else {
        errCh <- cmtrpcserver.Serve(s.listener, s.Router, cmtlogwrapper.CometLoggerWrapper{Logger: s.logger}, cmtCfg)
    }
}(cfg.API.EnableUnsafeCORS)
	// Start a blocking select to wait for an indication to stop the server or that
	// the server failed to start properly.
	select {
	case <-ctx.Done():
		// The calling process canceled or closed the provided context, so we must
		// gracefully stop the API server.
		s.logger.Info("stopping API server...", "address", cfg.API.Address)
		return s.Close()

	case err := <-errCh:
		s.logger.Error("failed to start API server", "err", err)
		return err
	}