upload-buffer-to-telegra.ph.js

const FormData = require('form-data')
async function uploadFile (file) {
  const form = new FormData()
  form.append(`data`, file.file, {
    filename: file.name
  })
  const res = await new Promise((resolve, reject) => {
    form.submit('https://telegra.ph/upload', (err, res) => {
      let data = ''
      res.on('data', chunk => data += chunk )
      res.on('end', () => resolve(JSON.parse(data)))
      res.on('error', reject)
    })
  })
  return res
}