       channelID: channel._id
       event: 'end'
       status: status
+      type: 'channel'
     }, { 'transactionID' }
     .hint created: 1
     .exec callback

  Event.count {
    created: $gte: dateFrom
    channelID: channel._id
    event: 'end'
  }, callback


      created: $gte: dateFrom
      channelID: channel._id
      event: 'end'
      type: 'channel'
      status: 500
      autoRetryAttempt: channel.autoRetryMaxAttempts
    }, { 'transactionID' }
