soocrate-core/src/communication/TextManager/TextEvent.js

this is the core of soocrate application

import { Event } from './../Event'
var debug = require('debug')('CRATE:Communication:TextManager:TextEvent')
export class TextEvent extends Event {
  constructor(opts) {
    super(opts)
    this._communicationChannel = this._document._communication._data_comm
    this._sequence = this._document.sequence
  }
  getLSEQID({ pair, id }) {
    let LSEQID = id
    if (pair) LSEQID = pair.id

    const idForCausal = {
      e: LSEQID._s[LSEQID._s.length - 1],
      c: LSEQID._c[LSEQID._c.length - 1]
    }

    return idForCausal
  }
}