const bot = new Wechaty()
await bot.start()
const contact = await bot.Contact.find({name: 'lijiarui'})  // change 'lijiarui' to any of your contact name in wechat
​
// 1. send text to contact
​
await contact.say('welcome to wechaty!')
​
// 2. send media file to contact
​
import { FileBox }  from 'file-box'
const fileBox1 = FileBox.fromUrl('https://chatie.io/wechaty/images/bot-qr-code.png')
const fileBox2 = FileBox.fromFile('/tmp/text.txt')
await contact.say(fileBox1)
await contact.say(fileBox2)
​
// 3. send contact card to contact
​
const contactCard = bot.Contact.load('contactId')
await contact.say(contactCard)
​
// 4. send url link to contact
​
const urlLink = new UrlLink ({
  description : 'this is url link description',
  thumbnailUrl: 'this is a thumbnail url',
  title       : 'this is url link title',
  url         : 'this is the url',
})
await contact.say(urlLink)

const name = contact.name()

const alias = await contact.alias()
if (alias === null) {
  console.log('You have not yet set any alias for contact ' + contact.name())
} else {
  console.log('You have already set an alias for contact ' + contact.name() + ':' + alias)
}

try {
  await contact.alias('lijiarui')
  console.log(`change ${contact.name()}'s alias successfully!`)
} catch (e) {
  console.log(`failed to change ${contact.name()} alias!`)
}

try {
  const oldAlias = await contact.alias(null)
  console.log(`delete ${contact.name()}'s alias successfully!`)
  console.log('old alias is ${oldAlias}`)
} catch (e) {
  console.log(`failed to delete ${contact.name()}'s alias!`)
}

const isFriend = contact.friend()

const bot = new Wechaty()
await bot.start()
const isOfficial = contact.type() === bot.Contact.Type.Official

const gender = contact.gender() === bot.Contact.Gender.Male

const province = contact.province()

const city = contact.city()

// Save avatar to local file like `1-name.jpg`
​
const file = await contact.avatar()
const name = file.name
await file.toFile(name, true)
console.log(`Contact: ${contact.name()} with avatar file: ${name}`)

await contact.sync()

const isSelf = contact.self()

const bot = new Wechaty()
await bot.start()
const contactFindByName = await bot.Contact.find({ name:"ruirui"} )
const contactFindByAlias = await bot.Contact.find({ alias:"lijiarui"} )

const bot = new Wechaty()
await bot.start()
const contactList = await bot.Contact.findAll()                      // get the contact list of the bot
const contactList = await bot.Contact.findAll({ name: 'ruirui' })    // find allof the contacts whose name is 'ruirui'
const contactList = await bot.Contact.findAll({ alias: 'lijiarui' }) // find all of the contacts whose alias is 'lijiarui'