bfx-api-node-plugin-seq-audit

Bitfinex Node API Sequence Number Audit Plugin

This plugin enables the sequence reporting flag upon connecting, and emits an error event upon receiving an invalid sequence number.

Note that the manager proxies the event as ws2:error. If subscribing on a socket instance (wsState.ev.on(...)) use the internal event name, otherwise use the manager name with manager.onWS(...).

Example

'use strict'

process.env.DEBUG = '*'

const debug = require('debug')('bfx:api:plugins:seq-audit:example')
const { Manager, subscribe } = require('bfx-api-node-core')
const SeqAuditPlugin = require('../')

const SYMBOL = 'tBTCUSD'
const mgr = new Manager({
  transform: true,
  plugins: [SeqAuditPlugin()]
})

mgr.onWS('open', {}, () => debug('connection open'))

// Catch checksum errors
mgr.onWS('ws2:error', {}, (err) => {
  if (err.message.match(/invalid(.*)seq/)) {
    debug('recv invalid seq # error: %s', err.message)
  }
})

const wsState = mgr.openWS()

subscribe(wsState, 'trades', { symbol: SYMBOL })