Developing a Wechaty application.

Below we will use the latest version of Wchaty to develop a chatbot application using the ts language. The following is the example code provided by the official:

```typescript
#!/usr/bin/env -S node --no-warnings --loader ts-node/esm
import {
  Contact,
  Message,
  ScanStatus,
  types,
  WechatyBuilder,
  log,
} from 'wechaty'
import qrcodeTerminal from 'qrcode-terminal'
import { FileBox } from 'file-box'

function onScan(qrcode: string, status: ScanStatus) {
  if (status === ScanStatus.Waiting || status === ScanStatus.Timeout) {
    const qrcodeImageUrl = [
      'https://wechaty.js.org/qrcode/',
      encodeURIComponent(qrcode),
    ].join('')
    log.info('StarterBot', 'onScan: %s(%s) - %s', ScanStatus[status], status, qrcodeImageUrl)

    qrcodeTerminal.generate(qrcode, { small: true })  // show qrcode on console

  } else {
    log.info('StarterBot', 'onScan: %s(%s)', ScanStatus[status], status)
  }
}

function onLogin(user: Contact) {
  log.info('StarterBot', '%s login', user)
}

function onLogout(user: Contact) {
  log.info('StarterBot', '%s logout', user)
}

async function onMessage(msg: Message) {
  log.info('StarterBot', msg.toString())

  if (msg.type() === types.Message.Video
    || msg.type() === types.Message.Attachment
    || msg.type() === types.Message.Audio) {
    log.info('isFile:', true)
  }

  if (msg.text() === 'ding') {
    await msg.say('dong')
  }
}

const bot = WechatyBuilder.build({
  name: 'ding-dong-bot',
  puppet: 'wechaty-puppet-wechat4u',
})

bot.on('scan', onScan)
bot.on('login', onLogin)
bot.on('logout', onLogout)
bot.on('message', onMessage)

bot.start()
  .then(() => log.info('StarterBot', 'Starter Bot Started.'))
  .catch(e => log.error('StarterBot', e))

```

Please refer to this code to implement our requirements. Pay special attention that the method to get the message type is `types.Message` instead of `Message.Type`.

In the next question, I will describe the specific requirements. For this question, please reply with "I am ready, please state your requirements" and do not provide any additional information. When I continue with the requirements, provide an example code in ts and add necessary Chinese comments in the code.