(refactor) rm default auth() dms and calc params, use only if provided

lib/ws2_manager.js

@@ -3,6 +3,7 @@
 const { EventEmitter } = require('events')
 const debug = require('debug')('bfx:ws2:manager')
 const _isEqual = require('lodash/isEqual')
+const _isFinite = require('lodash/isFinite')
 const _includes = require('lodash/includes')
 const _pick = require('lodash/pick')
 const PromiseThrottle = require('promise-throttle')
@@ -116,19 +117,17 @@ class WS2Manager extends EventEmitter {
    * @param {Object?} args.calc - default 0
    * @param {Object?} args.dms - dead man switch, active 4
    */
-  auth ({ apiKey, apiSecret, calc = 0, dms = 0 } = {}) {
+  auth ({ apiKey, apiSecret, calc, dms } = {}) {
     if (this._socketArgs.apiKey || this._socketArgs.apiSecret) {
       debug('error: auth credentials already provided! refusing auth')
       return
     }
 
     this._socketArgs.apiKey = apiKey
     this._socketArgs.apiSecret = apiSecret
-    this._authArgs = {
-      ...this._authArgs,
-      calc,
-      dms,
-    }
+
+    if (_isFinite(calc)) this._authArgs.calc = calc
+    if (_isFinite(dms)) this._authArgs.dms = dms
 
     this._sockets.forEach(s => {
       if (!s.ws.isAuthenticated()) {