class Bot {
    constructor(client) {
        this.client = client;
        this.client.on(ChatEvent.NEW_MESSAGE, this.processMessage.bind(this));
        this.client.on(ChatEvent.EDIT, this.processMessage.bind(this));
    }

    async processMessage(msg) {}
    saveData(name, data){}
}

class Client {
   async getSites() {
      let sites = this.bot.loadData('sites', sites);
      if(rep){
        return sites;
      }
        resp = await request({
            [...]
        });
        sites = JSON.parse(resp);
        this.bot.saveData('sites', sites);
        return sites;
}

bot = new Bot();
bot.client = new Client(bot);