generate-waves-address-list.js

function sleep(ms) {
  return  new Promise((resolve) => setTimeout(() => resolve(), ms))
}

function getOldestMessageTimestamp() {
  var d = (document.querySelector('.im_message_date_split_text')||{}).innerText
  if (!d) {
    var date = new Date()
    d = date.getFullYear() + '/' + (date.getMonth()+1) + '/' + date.getDate()
  }
  var t = document.querySelector('.im_message_date_text').getAttribute('data-content')
  return new Date(d + ' ' + t).getTime()
}

async function scrollToTime(timestamp) {

  if (timestamp >= getOldestMessageTimestamp()) {
    console.log('load completed')
    return
  }

  var wrap = document.querySelector('.im_history_scrollable_wrap')
  wrap.scrollTo(0,0)

  await sleep(300)

  return await scrollToTime(timestamp)
}

function generateAddressesListAsCSV(amount) {

  var users = {}

  Array.from(document.querySelectorAll('.im_message_wrap')).forEach(ele => {

    if (!ele.querySelector('.im_message_text') || !ele.querySelector('.im_message_author')) return null

    var address = (ele.querySelector('.im_message_text').innerText.match(/[a-zA-Z0-9]{35}/)||[])[0]

    if (!address) return null

    users[address] = [
      address,
      amount
    ]
  })

  var csv = Object.keys(users).map(address => {
    row = users[address]
    return row.join(',')
  }).join('\n')

  return csv
}

function downloadCsv(csv) {
  var anchor = document.createElement('a')
  var blob = new Blob([csv], { "type" : "text/plain" })
  anchor.download = "address.csv"
  anchor.href = URL.createObjectURL(blob)
  document.body.appendChild(anchor)
  anchor.click()
}

(async function main() {
  try {

    var date = new Date('2018-11-01 00:00:00')
    var timestamp = date.getTime()

    await scrollToTime(timestamp)

    var csv = generateAddressesListAsCSV(100)
    downloadCsv(csv)

  } catch (error) {
    console.error(error)
  }
})()