ttl1.js

// This uses level-sublevel to separate data from ttl meta data
// into different sublevels

var crypto = require('crypto')
var level = require('level')
var sublevel = require('level-sublevel')
var ttl = require('level-ttl')
var rmrf = require('rimraf')
var path = './duuuude_db'

rmrf(path, function (err) {
  if (err) throw err

  level(path, function (err, db) {
    if (err) throw err

    var subdb = sublevel(db)
    var ttldb = ttl(subdb.sublevel('data'), { sub: subdb.sublevel('meta') })

    ttldb.batch(randomBatch(10), { ttl: 10000 }, function (err) {
      if (err) throw err

      console.log('here comes data..')
      ttldb.createReadStream() // or subdb.sublevel('data').createReadStream()
        .on('data', function (data) {
          console.log('- key', data.key)
          console.log('- value', data.value)
        })
        .on('end', function () {
          console.log('\nhere comes ttl meta..')
          subdb.sublevel('meta').createReadStream()
            .on('data', function (data) {
              console.log('- key', data.key)
              console.log('- value', data.value)
            })
            .on('end', function () {
              console.log('\nhere comes everything..')
              db.createReadStream()
                .on('data', function (data) {
                  console.log('- key', data.key)
                  console.log('- value', data.value)
                })
            })
        })

    })

  })

})

function randomBatch(count) {
  var batch = []
  for (var i = 0; i < count; ++i) {
    var key = crypto.randomBytes(32).toString('base64')
    var value = crypto.randomBytes(32).toString('base64')
    batch.push({ type: 'put', key: key, value: value })
  }
  return batch
}