Rocket.Chat.ReactNative/app/containers/routes/NavigationService.js

import { NavigationActions } from 'react-navigation';

const config = {};

export function setNavigator(nav) {
	if (nav) {
		config.navigator = nav;
	}
}

export function navigate(routeName, params) {
	if (config.navigator && routeName) {
		const action = NavigationActions.navigate({ routeName, params });
		config.navigator.dispatch(action);
	}
}

export function goBack() {
	if (config.navigator) {
		const action = NavigationActions.back({});
		config.navigator.dispatch(action);
	}
}