mount() {
    /**
     * Returns all polls
     */
    this.app.get('/polls', server.handleRequest(this.getPolls))

    /**
     * Return a poll by id
     * @param {string} id
     */
    this.app.get('/polls/:id', server.handleRequest(this.getPoll))
  }

function getString(req: Request, param: string, defaultValue: any = null) {
  try {
    return server.extractFromReq(req, param)
  } catch (error) {
    return defaultValue
  }
}

  mount() {
    /**
     * Returns a full vote by id
     */
    this.app.get('/votes/:id', server.handleRequest(this.getVote))

    /**
     * Returns the votes for a poll
     */
    this.app.get('/polls/:id/votes', server.handleRequest(this.getPollVotes))

    /**
     * Creates a new vote, returns the new id
     */
    this.app.post('/votes', server.handleRequest(this.createVote))
  }

 mount() {
   /**
    * Returns the votes for a poll
    */
   this.app.get(
     '/accountBalances/:address',
     server.handleRequest(this.getAccountBalances)
   )
 }

  mount() {
    /**
     * Returns all receipts
     */
    this.app.get('/receipts', server.handleRequest(this.getReceipts))

    /**
     * Returns a receipt by id
     */
    this.app.get('/receipts/:id', server.handleRequest(this.getReceipt))

    /**
     * Returns account receipts
     */
    this.app.get(
      '/accounts/:address/receipts',
      server.handleRequest(this.getAccountReceipts)
    )
  }

 mount() {
   /**
    * Returns the translations for a given locale
    * @param  {string} locale - locale name
    * @return {array<Translation>}
    */
   this.app.get(
     '/translations/:locale',
     server.handleRequest(this.getTranslations)
   )
 }

 async getTranslations(req: express.Request): Promise<TranslationData> {
   let locale = server.extractFromReq(req, 'locale')
   locale = locale.slice(0, 2) // We support base locales for now, like en, it, etc
   return new Translation().fetch(locale)
 }

 async getPollVotes(req: express.Request) {
   const pollId = server.extractFromReq(req, 'id')
   return Vote.find({ poll_id: pollId })
 }

 mount() {
   /**
    * Returns the votes for a poll
    */
   this.app.get('/polls/:id/options', server.handleRequest(this.getPollVotes))
 }

 async getPollVotes(req: express.Request) {
   const pollId = server.extractFromReq(req, 'id')
   return Option.find<OptionAttributes>({ poll_id: Number(pollId) })
 }