Merge pull request #350 from ethereum/remix-libs-refactor-2

Refactor remix lib - remix-debug - remix-solidity

apps/remix-ide/src/app/editor/contextView.js

@@ -1,7 +1,7 @@
 'use strict'
 const yo = require('yo-yo')
-const remixLib = require('@remix-project/remix-lib')
-const SourceMappingDecoder = remixLib.SourceMappingDecoder
+const remixDebug = require('@remix-project/remix-debug')
+const SourceMappingDecoder = remixDebug.SourceMappingDecoder
 const globalRegistry = require('../../global/registry')
 
 const css = require('./styles/contextView-styles')

apps/remix-ide/src/app/editor/contextualListener.js

@@ -1,8 +1,8 @@
 'use strict'
-const remixLib = require('@remix-project/remix-lib')
+const remixdebug = require('@remix-project/remix-debug')
 const csjs = require('csjs-inject')
-const SourceMappingDecoder = remixLib.SourceMappingDecoder
-const AstWalker = remixLib.AstWalker
+const SourceMappingDecoder = remixdebug.SourceMappingDecoder
+const AstWalker = remixdebug.AstWalker
 const EventManager = require('../../lib/events')
 const globalRegistry = require('../../global/registry')
 import { Plugin } from '@remixproject/engine'

apps/remix-ide/src/app/tabs/debugger-tab.js

@@ -1,5 +1,5 @@
 const yo = require('yo-yo')
-const remixLib = require('@remix-project/remix-lib')
+const remixDebug = require('@remix-project/remix-debug')
 const css = require('./styles/debugger-tab-styles')
 import toaster from '../ui/tooltip'
 const DebuggerUI = require('./debugger/debuggerUI')
@@ -59,7 +59,7 @@ class DebuggerTab extends ViewPlugin {
       this,
       this.el.querySelector('#debugger'),
       (address, receipt) => {
-        const target = (address && remixLib.helpers.trace.isContractCreation(address)) ? receipt.contractAddress : address
+        const target = (address && remixDebug.traceHelper.isContractCreation(address)) ? receipt.contractAddress : address
         return this.call('fetchAndCompile', 'resolve', target || receipt.contractAddress || receipt.to, '.debug', this.blockchain.web3())
       }
     )

apps/remix-ide/src/app/tabs/debugger/debuggerUI.js

@@ -11,9 +11,9 @@ var EventManager = require('../../../lib/events')
 
 var globalRegistry = require('../../../global/registry')
 
-var remixLib = require('@remix-project/remix-lib')
+var remixDebug = require('@remix-project/remix-debug')
 
-var init = remixLib.init
+var init = remixDebug.init
 
 var yo = require('yo-yo')
 var csjs = require('csjs-inject')

apps/remix-ide/src/lib/cmdInterpreterAPI.js

@@ -1,7 +1,7 @@
 'use strict'
 var yo = require('yo-yo')
 var async = require('async')
-var remixLib = require('@remix-project/remix-lib')
+var remixDebug = require('@remix-project/remix-debug')
 var EventManager = require('../lib/events')
 
 var CompilerImport = require('../app/compiler/compiler-imports')
@@ -116,7 +116,7 @@ class CmdInterpreterAPI {
       }
       self.d.goTo = (row) => {
         if (self._deps.editor.current()) {
-          var breakPoint = new remixLib.code.BreakpointManager(self.d, (sourceLocation) => {
+          var breakPoint = new remixDebug.BreakpointManager(self.d, (sourceLocation) => {
             return self._deps.offsetToLineColumnConverter.offsetToLineColumn(sourceLocation, sourceLocation.file,
               self._deps.compilersArtefacts['__last'].getSourceCode().sources,
               self._deps.compilersArtefacts['__last'].getAsts())

apps/remix-ide/src/lib/offsetToLineColumnConverter.js

@@ -1,7 +1,7 @@
 'use strict'
 import { Plugin } from '@remixproject/engine'
 import * as packageJson from '../../../../package.json'
-const SourceMappingDecoder = require('@remix-project/remix-lib').SourceMappingDecoder
+var SourceMappingDecoder = require('@remix-project/remix-debug').SourceMappingDecoder
 
 const profile = {
   name: 'offsetToLineColumnConverter',

libs/remix-debug/index.js

@@ -1,4 +1,5 @@
 'use strict'
+const init = require('./src/init')
 const EthDebugger = require('./src/Ethdebugger')
 const TransactionDebugger = require('./src/debugger/debugger')
 const CmdLine = require('./src/cmdline')
@@ -8,8 +9,12 @@ const StorageResolver = require('./src/storage/storageResolver')
 
 const SolidityDecoder = require('./src/solidity-decoder')
 
-const remixLib = require('@remix-project/remix-lib')
-const BreakpointManager = remixLib.code.BreakpointManager
+const BreakpointManager = require('./src/code/breakpointManager')
+
+const SourceMappingDecoder = require('./src/source/sourceMappingDecoder')
+const AstWalker = require('./src/source/astWalker')
+
+const traceHelper = require('./src/trace/traceHelper')
 
 /*
   Use of breakPointManager :
@@ -20,6 +25,10 @@ const BreakpointManager = remixLib.code.BreakpointManager
   this.debugger.setBreakpointManager(breakPointManager)
 */
 module.exports = {
+  init,
+  traceHelper,
+  SourceMappingDecoder,
+  AstWalker,
   EthDebugger: EthDebugger,
   TransactionDebugger: TransactionDebugger,
   /**
@@ -36,4 +45,3 @@ module.exports = {
   },
   CmdLine: CmdLine
 }
-

libs/remix-debug/src/Ethdebugger.js

@@ -1,16 +1,15 @@
 'use strict'
 
-const remixLib = require('@remix-project/remix-lib')
-const TraceManager = remixLib.trace.TraceManager
-const CodeManager = remixLib.code.CodeManager
-const traceHelper = remixLib.helpers.trace
-const EventManager = remixLib.EventManager
-
-const {SolidityProxy, stateDecoder, localDecoder, InternalCallTree} = require('./solidity-decoder')
-
 const StorageViewer = require('./storage/storageViewer')
 const StorageResolver = require('./storage/storageResolver')
 
+const TraceManager = require('./trace/traceManager')
+const CodeManager = require('./code/codeManager')
+const traceHelper = require('./trace/traceHelper')
+const EventManager = require('./eventManager')
+
+const {SolidityProxy, stateDecoder, localDecoder, InternalCallTree} = require('./solidity-decoder')
+
 /**
   * Ethdebugger is a wrapper around a few classes that helps debugging a transaction
   *

libs/remix-debug/src/cmdline/contextManager.js

@@ -1,58 +0,0 @@
-const remixLib = require('@remix-project/remix-lib')
-
-const EventManager = remixLib.EventManager
-const Web3Providers = remixLib.vm.Web3Providers
-const DummyProvider = remixLib.vm.DummyProvider
-const init = remixLib.init
-
-class ContextManager {
-  constructor (executionContext) {
-    this.executionContext = executionContext
-    this.web3 = this.executionContext.web3()
-    this.event = new EventManager()
-  }
-
-  initProviders () {
-    this.web3Providers = new Web3Providers()
-    this.addProvider('DUMMYWEB3', new DummyProvider())
-    this.switchProvider('DUMMYWEB3')
-
-    this.addProvider('vm', this.executionContext.vm())
-    this.addProvider('injected', this.executionContext.internalWeb3())
-    this.addProvider('web3', this.executionContext.internalWeb3())
-    this.switchProvider(this.executionContext.getProvider())
-  }
-
-  getWeb3 () {
-    return this.web3
-  }
-
-  addProvider (type, obj) {
-    this.web3Providers.addProvider(type, obj)
-    this.event.trigger('providerAdded', [type])
-  }
-
-  switchProvider (type, cb) {
-    this.web3Providers.get(type, (error, obj) => {
-      if (error) {
-        // console.log('provider ' + type + ' not defined')
-      } else {
-        this.web3 = obj
-        this.executionContext.detectNetwork((error, network) => {
-          if (error || !network) {
-            this.web3 = obj
-          } else {
-            var webDebugNode = init.web3DebugNode(network.name)
-            this.web3 = (!webDebugNode ? obj : webDebugNode)
-          }
-          this.event.trigger('providerChanged', [type, this.web3])
-          if (cb) return cb()
-        })
-        this.event.trigger('providerChanged', [type, this.web3])
-      }
-    })
-  }
-
-}
-
-module.exports = ContextManager

libs/remix-debug/src/cmdline/index.js

@@ -1,14 +1,10 @@
 const Web3 = require('web3')
 const Debugger = require('../debugger/debugger.js')
-const ContextManager = require('./contextManager.js')
 import EventManager from 'events'
-const remixLib = require('@remix-project/remix-lib')
-const executionContext = remixLib.execution.executionContext
 
 class CmdLine {
 
   constructor () {
-    this.executionContext = executionContext
     this.events = new EventManager()
     this.lineColumnPos = null
     this.rawLocation = null
@@ -32,21 +28,10 @@ class CmdLine {
   }
 
   initDebugger (cb) {
-    this.contextManager = new ContextManager(this.executionContext)
-
     this.debugger = new Debugger({
-      web3: this.contextManager.getWeb3(),
+      web3: this.web3,
       compilationResult: () => { return this.compilation.compilationResult }
     })
-
-    this.contextManager.event.register('providerChanged', () => {
-      this.debugger.updateWeb3(this.contextManager.getWeb3())
-    })
-
-    this.contextManager.initProviders()
-
-    this.contextManager.addProvider('debugger_web3', this.web3)
-    this.contextManager.switchProvider('debugger_web3', cb)
   }
 
   getSource () {

libs/remix-debug/src/code/breakpointManager.js

@@ -1,7 +1,7 @@
 'use strict'
 
 const EventManager = require('../eventManager')
-const helper = require('../helpers/traceHelper')
+const helper = require('../trace/traceHelper')
 
 /**
   * allow to manage breakpoint
@@ -21,7 +21,7 @@ class BreakpointManager {
     this.breakpoints = {}
     this.locationToRowConverter = _locationToRowConverter
     this.previousLine
-    this.jumpToCallback = _jumpToCallback || (() => {})
+    this.jumpToCallback = _jumpToCallback || (() => {}) // eslint-disable-line
   }
 
   /**

libs/remix-debug/src/code/codeManager.js

@@ -1,8 +1,8 @@
 'use strict'
 
 const EventManager = require('../eventManager')
-const traceHelper = require('../helpers/traceHelper')
-const SourceMappingDecoder = require('../sourceMappingDecoder')
+const traceHelper = require('../trace/traceHelper')
+const SourceMappingDecoder = require('../source/sourceMappingDecoder')
 const CodeResolver = require('./codeResolver')
 
 /*

libs/remix-debug/src/code/disassembler.js

@@ -1,7 +1,8 @@
 'use strict'
 
 const parseCode = require('./codeUtils').parseCode
-const util = require('../util')
+const remixLib = require('@remix-project/remix-lib')
+const util = remixLib.util
 
 const createExpressions = function (instructions) {
   const expressions = []

libs/remix-debug/src/debugger/VmDebugger.js

@@ -1,5 +1,5 @@
 const remixLib = require('@remix-project/remix-lib')
-const EventManager = remixLib.EventManager
+const EventManager = require('../eventManager')
 const ui = remixLib.helpers.ui
 const StorageResolver = require('../storage/storageResolver')
 const StorageViewer = require('../storage/storageViewer')

libs/remix-debug/src/debugger/debugger.js

@@ -1,9 +1,8 @@
 'use strict'
 const Ethdebugger = require('../Ethdebugger')
-const remixLib = require('@remix-project/remix-lib')
-const EventManager = remixLib.EventManager
-const traceHelper = remixLib.helpers.trace
-const OffsetToColumnConverter = remixLib.OffsetToColumnConverter
+const EventManager = require('../eventManager')
+const traceHelper = require('../trace/traceHelper')
+const BreakpointManager = require('../code/breakpointManager')
 
 const StepManager = require('./stepManager')
 const VmDebuggerLogic = require('./VmDebugger')
@@ -11,7 +10,7 @@ const VmDebuggerLogic = require('./VmDebugger')
 function Debugger (options) {
   this.event = new EventManager()
 
-  this.offsetToLineColumnConverter = options.offsetToLineColumnConverter || (new OffsetToColumnConverter())
+  this.offsetToLineColumnConverter = options.offsetToLineColumnConverter
   /*
     Returns a compilation result for a given address or the last one available if none are found
   */
@@ -22,7 +21,7 @@ function Debugger (options) {
     compilationResult: this.compilationResult
   })
 
-  this.breakPointManager = new remixLib.code.BreakpointManager(this.debugger, async (sourceLocation) => {
+  this.breakPointManager = new BreakpointManager(this.debugger, async (sourceLocation) => {
     const compilationResult = await this.compilationResult()
     if (!compilationResult) return { start: null, end: null }
     return this.offsetToLineColumnConverter.offsetToLineColumn(sourceLocation, sourceLocation.file, compilationResult.source.sources, compilationResult.data.sources)

libs/remix-debug/src/debugger/solidityLocals.js

@@ -1,5 +1,4 @@
-const remixLib = require('@remix-project/remix-lib')
-const EventManager = remixLib.EventManager
+const EventManager = require('../eventManager')
 
 const localDecoder = require('../solidity-decoder/localDecoder')
 const StorageViewer = require('../storage/storageViewer')

libs/remix-debug/src/debugger/solidityState.js

@@ -1,5 +1,4 @@
-const remixLib = require('@remix-project/remix-lib')
-const EventManager = remixLib.EventManager
+const EventManager = require('../eventManager')
 const stateDecoder = require('../solidity-decoder/stateDecoder')
 const StorageViewer = require('../storage/storageViewer')
 

libs/remix-debug/src/debugger/stepManager.js

@@ -1,5 +1,5 @@
 const remixLib = require('@remix-project/remix-lib')
-const EventManager = remixLib.EventManager
+const EventManager = require('../eventManager')
 const util = remixLib.util
 
 class DebuggerStepManager {

libs/remix-debug/src/eventManager.js

@@ -0,0 +1,70 @@
+'use strict'
+
+function eventManager () {
+  this.registered = {}
+  this.anonymous = {}
+}
+
+/*
+   * Unregister a listener.
+   * Note that if obj is a function. the unregistration will be applied to the dummy obj {}.
+   *
+   * @param {String} eventName  - the event name
+   * @param {Object or Func} obj - object that will listen on this event
+   * @param {Func} func         - function of the listeners that will be executed
+*/
+eventManager.prototype.unregister = function (eventName, obj, func) {
+  if (!this.registered[eventName]) {
+    return
+  }
+  if (obj instanceof Function) {
+    func = obj
+    obj = this.anonymous
+  }
+  for (let reg in this.registered[eventName]) {
+    if (this.registered[eventName][reg].obj === obj && this.registered[eventName][reg].func === func) {
+      this.registered[eventName].splice(reg, 1)
+    }
+  }
+}
+
+/*
+   * Register a new listener.
+   * Note that if obj is a function, the function registration will be associated with the dummy object {}
+   *
+   * @param {String} eventName  - the event name
+   * @param {Object or Func} obj - object that will listen on this event
+   * @param {Func} func         - function of the listeners that will be executed
+*/
+eventManager.prototype.register = function (eventName, obj, func) {
+  if (!this.registered[eventName]) {
+    this.registered[eventName] = []
+  }
+  if (obj instanceof Function) {
+    func = obj
+    obj = this.anonymous
+  }
+  this.registered[eventName].push({
+    obj: obj,
+    func: func
+  })
+}
+
+/*
+   * trigger event.
+   * Every listener have their associated function executed
+   *
+   * @param {String} eventName  - the event name
+   * @param {Array}j - argument that will be passed to the executed function.
+*/
+eventManager.prototype.trigger = function (eventName, args) {
+  if (!this.registered[eventName]) {
+    return
+  }
+  for (let listener in this.registered[eventName]) {
+    const l = this.registered[eventName][listener]
+    l.func.apply(l.obj === this.anonymous ? {} : l.obj, args)
+  }
+}
+
+module.exports = eventManager

libs/remix-debug/src/init.js

@@ -0,0 +1,76 @@
+'use strict'
+const Web3 = require('web3')
+
+module.exports = {
+  loadWeb3: function (url) {
+    if (!url) url = 'http://localhost:8545'
+    const web3 = new Web3()
+    web3.setProvider(new web3.providers.HttpProvider(url))
+    this.extend(web3)
+    return web3
+  },
+
+  extendWeb3: function (web3) {
+    this.extend(web3)
+  },
+
+  setProvider: function (web3, url) {
+    web3.setProvider(new web3.providers.HttpProvider(url))
+  },
+
+  web3DebugNode: function (network) {
+    if (web3DebugNodes[network]) {
+      return this.loadWeb3(web3DebugNodes[network])
+    }
+    return null
+  },
+
+  extend: function (web3) {
+    if (!web3.extend) {
+      return
+    }
+    // DEBUG
+    const methods = []
+    if (!(web3.debug && web3.debug.preimage)) {
+      methods.push(new web3.extend.Method({
+        name: 'preimage',
+        call: 'debug_preimage',
+        inputFormatter: [null],
+        params: 1
+      }))
+    }
+
+    if (!(web3.debug && web3.debug.traceTransaction)) {
+      methods.push(new web3.extend.Method({
+        name: 'traceTransaction',
+        call: 'debug_traceTransaction',
+        inputFormatter: [null, null],
+        params: 2
+      }))
+    }
+
+    if (!(web3.debug && web3.debug.storageRangeAt)) {
+      methods.push(new web3.extend.Method({
+        name: 'storageRangeAt',
+        call: 'debug_storageRangeAt',
+        inputFormatter: [null, null, null, null, null],
+        params: 5
+      }))
+    }
+    if (methods.length > 0) {
+      web3.extend({
+        property: 'debug',
+        methods: methods,
+        properties: []
+      })
+    }
+  }
+}
+
+const web3DebugNodes = {
+  'Main': 'https://gethmainnet.komputing.org',
+  'Rinkeby': 'https://remix-rinkeby.ethdevops.io',
+  'Ropsten': 'https://remix-ropsten.ethdevops.io',
+  'Goerli': 'https://remix-goerli.ethdevops.io',
+  'Kovan': 'https://remix-kovan.ethdevops.io'
+}

libs/remix-debug/src/solidity-decoder/astHelper.js

@@ -1,6 +1,5 @@
 'use strict'
-const remixLib = require('@remix-project/remix-lib')
-const AstWalker = remixLib.AstWalker
+const AstWalker = require('../source/astWalker')
 
 /**
   * return all contract definitions of the given @astList

libs/remix-debug/src/solidity-decoder/internalCallTree.js

@@ -1,11 +1,12 @@
 'use strict'
 const remixLib = require('@remix-project/remix-lib')
-const SourceLocationTracker = remixLib.SourceLocationTracker
-const AstWalker = remixLib.AstWalker
-const EventManager = remixLib.EventManager
+const SourceLocationTracker = require('../source/sourceLocationTracker')
+const AstWalker = require('../source/astWalker')
+const EventManager = require('../eventManager')
+
 const decodeInfo = require('./decodeInfo')
 const util = remixLib.util
-const traceHelper = remixLib.helpers.trace
+const traceHelper = require('../trace/traceHelper')
 const typesUtil = require('./types/util.js')
 
 /**

libs/remix-debug/src/solidity-decoder/solidityProxy.js

@@ -1,6 +1,6 @@
 'use strict'
 const remixLib = require('@remix-project/remix-lib')
-const traceHelper = remixLib.helpers.trace
+const traceHelper = require('../trace/traceHelper')
 const stateDecoder = require('./stateDecoder')
 const astHelper = require('./astHelper')
 const util = remixLib.util

libs/remix-debug/src/source/astWalker.js

@@ -2,8 +2,7 @@
 /**
  * Crawl the given AST through the function walk(ast, callback)
  */
-function AstWalker () {
-}
+function AstWalker () {} // eslint-disable-line
 
 /**
  * visit all the AST nodes

libs/remix-debug/src/source/offsetToLineColumnConverter.js

@@ -4,10 +4,9 @@ const SourceMappingDecoder = require('./sourceMappingDecoder')
 function offsetToColumnConverter (compilerEvent) {
   this.lineBreakPositionsByContent = {}
   this.sourceMappingDecoder = new SourceMappingDecoder()
-  var self = this
   if (compilerEvent) {
     compilerEvent.register('compilationFinished', (success, data, source) => {
-      self.clear()
+      this.clear()
     })
   }
 }

libs/remix-debug/src/source/sourceLocationTracker.js

@@ -1,8 +1,9 @@
 'use strict'
-const EventManager = require('./eventManager')
-const helper = require('./helpers/traceHelper')
+const EventManager = require('../eventManager')
+const helper = require('../trace/traceHelper')
 const SourceMappingDecoder = require('./sourceMappingDecoder')
-const util = require('./util')
+const remixLib = require('@remix-project/remix-lib')
+const util = remixLib.util
 
 /**
  * Process the source code location for the current executing bytecode

libs/remix-debug/src/source/sourceMappingDecoder.js

@@ -1,5 +1,6 @@
 'use strict'
-const util = require('./util')
+const remixLib = require('@remix-project/remix-lib')
+const util = remixLib.util
 const AstWalker = require('./astWalker')
 
 /**

libs/remix-debug/src/storage/storageResolver.js

@@ -1,6 +1,5 @@
 'use strict'
-const remixLib = require('@remix-project/remix-lib')
-const traceHelper = remixLib.helpers.trace
+const traceHelper = require('../trace/traceHelper')
 const mappingPreimages = require('./mappingPreimages')
 
 /**

libs/remix-debug/src/trace/traceAnalyser.js

@@ -1,5 +1,5 @@
 'use strict'
-const traceHelper = require('../helpers/traceHelper')
+const traceHelper = require('./traceHelper')
 
 function TraceAnalyser (_cache) {
   this.traceCache = _cache

libs/remix-debug/src/trace/traceCache.js

@@ -1,5 +1,6 @@
 'use strict'
-const helper = require('../util')
+const remixLib = require('@remix-project/remix-lib')
+const helper = remixLib.util
 
 function TraceCache () {
   this.init()

libs/remix-debug/src/trace/traceHelper.js

@@ -1,5 +1,6 @@
 'use strict'
-const ui = require('./uiHelper')
+const remixLib = require('@remix-project/remix-lib')
+const ui = remixLib.helpers.ui
 
 module.exports = {
   // vmTraceIndex has to point to a CALL, CODECALL, ...

libs/remix-debug/src/trace/traceManager.js

@@ -3,8 +3,9 @@ const TraceAnalyser = require('./traceAnalyser')
 const TraceCache = require('./traceCache')
 const TraceStepManager = require('./traceStepManager')
 
-const traceHelper = require('../helpers/traceHelper')
-const util = require('../util')
+const traceHelper = require('./traceHelper')
+const remixLib = require('@remix-project/remix-lib')
+const util = remixLib.util
 
 function TraceManager (options) {
   this.web3 = options.web3

libs/remix-debug/src/trace/traceStepManager.js

@@ -1,7 +1,8 @@
 'use strict'
 
-const traceHelper = require('../helpers/traceHelper')
-const util = require('../util')
+const traceHelper = require('./traceHelper')
+const remixLib = require('@remix-project/remix-lib')
+const util = remixLib.util
 
 function TraceStepManager (_traceAnalyser) {
   this.traceAnalyser = _traceAnalyser

libs/remix-debug/test/astwalker.js

@@ -1,6 +1,6 @@
 'use strict'
 const tape = require('tape')
-const AstWalker = require('../src/astWalker')
+const AstWalker = require('../src/source/astWalker')
 const node = require('./resources/ast')
 
 tape('ASTWalker', function (t) {

libs/remix-debug/test/codeManager.js

@@ -1,34 +1,19 @@
 'use strict'
 const tape = require('tape')
-const Web3Providers = require('../src/web3Provider/web3Providers')
 const TraceManager = require('../src/trace/traceManager')
 const CodeManager = require('../src/code/codeManager')
 const web3Test = require('./resources/testWeb3')
 
-let web3 = null
-
 tape('CodeManager', function (t) {
-  let codeManager
-  const web3Providers = new Web3Providers()
-  web3Providers.addProvider('TEST', web3Test)
-  web3Providers.get('TEST', function (error, obj) {
-    if (error) {
-      const mes = 'provider TEST not defined'
-      console.log(mes)
-      t.fail(mes)
-    } else {
-      web3 = obj
-      const traceManager = new TraceManager({web3: web3})
-      codeManager = new CodeManager(traceManager)
-      const contractCode = web3.eth.getCode('0x0d3a18d64dfe4f927832ab58d6451cecc4e517c5')
-      codeManager.codeResolver.cacheExecutingCode('0x0d3a18d64dfe4f927832ab58d6451cecc4e517c5', contractCode) // so a call to web3 is not necessary
-      const tx = web3.eth.getTransaction('0x20ef65b8b186ca942fcccd634f37074dde49b541c27994fc7596740ef44cfd51')
-      traceManager.resolveTrace(tx).then(() => {
-        continueTesting(t, codeManager)
-      }).catch(() => {
-        t.fail(' - traceManager.resolveTrace - failed ')
-      })
-    }
+  const traceManager = new TraceManager({web3: web3Test})
+  let codeManager = new CodeManager(traceManager)
+  const contractCode = web3Test.eth.getCode('0x0d3a18d64dfe4f927832ab58d6451cecc4e517c5')
+  codeManager.codeResolver.cacheExecutingCode('0x0d3a18d64dfe4f927832ab58d6451cecc4e517c5', contractCode) // so a call to web3 is not necessary
+  const tx = web3Test.eth.getTransaction('0x20ef65b8b186ca942fcccd634f37074dde49b541c27994fc7596740ef44cfd51')
+  traceManager.resolveTrace(tx).then(() => {
+    continueTesting(t, codeManager)
+  }).catch(() => {
+    t.fail(' - traceManager.resolveTrace - failed ')
   })
 })
 
@@ -61,7 +46,7 @@ function continueTesting (t, codeManager) {
         }
       }
     })
-    const tx = web3.eth.getTransaction('0x20ef65b8b186ca942fcccd634f37074dde49b541c27994fc7596740ef44cfd51')
+    const tx = web3Test.eth.getTransaction('0x20ef65b8b186ca942fcccd634f37074dde49b541c27994fc7596740ef44cfd51')
     codeManager.resolveStep(0, tx)
     codeManager.resolveStep(70, tx)
   })
@@ -84,4 +69,4 @@ function continueTesting (t, codeManager) {
       st.fail(error)
     }
   })
-}
+}

libs/remix-debug/test/debugger.js

@@ -1,6 +1,8 @@
 var tape = require('tape')
 var remixLib = require('@remix-project/remix-lib')
-var compilerInput = remixLib.helpers.compiler.compilerInput
+var compilerInput = require('./helpers/compilerHelper').compilerInput
+var SourceMappingDecoder = require('../src/source/sourceMappingDecoder')
+
 var vmCall = require('./vmCall')
 var Debugger = require('../src/Ethdebugger')
 var compiler = require('solc')
@@ -146,7 +148,7 @@ contract Ballot {
 }
 `
 
-var BreakpointManager = remixLib.code.BreakpointManager
+var BreakpointManager = require('../src/code/breakpointManager')
 
 var privateKey = Buffer.from('dae9801649ba2d95a21e688b56f77905e5667c44ce868ec83f82e838712a2c7a', 'hex')
 var vm = vmCall.initVM(privateKey)
@@ -270,7 +272,7 @@ function testDebugging (debugManager) {
 
   tape('breakPointManager', (t) => {
     t.plan(2)
-    var sourceMappingDecoder = new remixLib.SourceMappingDecoder()
+    var sourceMappingDecoder = new SourceMappingDecoder()
     var breakPointManager = new BreakpointManager(debugManager, (rawLocation) => {
       return sourceMappingDecoder.convertOffsetToLineColumn(rawLocation, sourceMappingDecoder.getLinebreakPositions(ballot))
     })

libs/remix-debug/test/decoder/decodeInfo.js

@@ -6,8 +6,7 @@ var decodeInfo = require('../../src/solidity-decoder/decodeInfo')
 var stateDecoder = require('../../src/solidity-decoder/stateDecoder')
 var contracts = require('./contracts/miscContracts')
 var simplecontracts = require('./contracts/simpleContract')
-var remixLib = require('@remix-project/remix-lib')
-var compilerInput = remixLib.helpers.compiler.compilerInput
+var compilerInput = require('../helpers/compilerHelper').compilerInput
 var util = require('../../src/solidity-decoder/types/util')
 
 tape('solidity', function (t) {

libs/remix-debug/test/decoder/localDecoder.js

@@ -4,13 +4,12 @@ var compiler = require('solc')
 var intLocal = require('./contracts/intLocal')
 var miscLocal = require('./contracts/miscLocal')
 var structArrayLocal = require('./contracts/structArrayLocal')
-var remixLib = require('@remix-project/remix-lib')
 var vmCall = require('./vmCall')
 var intLocalTest = require('./localsTests/int')
 var miscLocalTest = require('./localsTests/misc')
 var misc2LocalTest = require('./localsTests/misc2')
 var structArrayLocalTest = require('./localsTests/structArray')
-var compilerInput = remixLib.helpers.compiler.compilerInput
+var compilerInput = require('../helpers/compilerHelper').compilerInput
 
 tape('solidity', function (t) {
   t.test('local decoder', function (st) {

libs/remix-debug/test/decoder/localsTests/int.js

@@ -3,13 +3,13 @@
 var vmCall = require('../vmCall')
 var remixLib = require('@remix-project/remix-lib')
 
-var TraceManager = remixLib.trace.TraceManager
-var CodeManager = remixLib.code.CodeManager
+var TraceManager = require('../../../src/trace/traceManager')
+var CodeManager = require('../../../src/code/codeManager')
 
-var traceHelper = remixLib.helpers.trace
+var traceHelper = require('../../../src/trace/traceHelper')
 var SolidityProxy = require('../../../src/solidity-decoder/solidityProxy')
 var InternalCallTree = require('../../../src/solidity-decoder/internalCallTree')
-var EventManager = remixLib.EventManager
+var EventManager = require('../../../src/eventManager')
 var helper = require('./helper')
 
 module.exports = function (st, vm, privateKey, contractBytecode, compilationResult, cb) {

libs/remix-debug/test/decoder/localsTests/misc.js

@@ -1,14 +1,13 @@
 'use strict'
 var vmCall = require('../vmCall')
-var remixLib = require('@remix-project/remix-lib')
-var traceHelper = remixLib.helpers.trace
+var traceHelper = require('../../../src/trace/traceHelper')
 var SolidityProxy = require('../../../src/solidity-decoder/solidityProxy')
 var InternalCallTree = require('../../../src/solidity-decoder/internalCallTree')
-var EventManager = remixLib.EventManager
+var EventManager = require('../../../src/eventManager')
 var helper = require('./helper')
 
-var TraceManager = remixLib.trace.TraceManager
-var CodeManager = remixLib.code.CodeManager
+var TraceManager = require('../../../src/trace/traceManager')
+var CodeManager = require('../../../src/code/codeManager')
 
 module.exports = function (st, vm, privateKey, contractBytecode, compilationResult, cb) {
   vmCall.sendTx(vm, {nonce: 0, privateKey: privateKey}, null, 0, contractBytecode, function (error, txHash) {

libs/remix-debug/test/decoder/localsTests/misc2.js

@@ -1,14 +1,14 @@
 'use strict'
 var vmCall = require('../vmCall')
-var remixLib = require('@remix-project/remix-lib')
-var traceHelper = remixLib.helpers.trace
+var traceHelper = require('../../../src/trace/traceHelper')
 var SolidityProxy = require('../../../src/solidity-decoder/solidityProxy')
 var InternalCallTree = require('../../../src/solidity-decoder/internalCallTree')
-var EventManager = remixLib.EventManager
+var EventManager = require('../../../src/eventManager')
+
 var helper = require('./helper')
 
-var TraceManager = remixLib.trace.TraceManager
-var CodeManager = remixLib.code.CodeManager
+var TraceManager = require('../../../src/trace/traceManager')
+var CodeManager = require('../../../src/code/codeManager')
 
 module.exports = function (st, vm, privateKey, contractBytecode, compilationResult, cb) {
   vmCall.sendTx(vm, {nonce: 0, privateKey: privateKey}, null, 0, contractBytecode, function (error, txHash) {

libs/remix-debug/test/decoder/localsTests/structArray.js

@@ -1,14 +1,13 @@
 'use strict'
 var vmCall = require('../vmCall')
-var remixLib = require('@remix-project/remix-lib')
-var traceHelper = remixLib.helpers.trace
+var traceHelper = require('../../../src/trace/traceHelper')
 var SolidityProxy = require('../../../src/solidity-decoder/solidityProxy')
 var InternalCallTree = require('../../../src/solidity-decoder/internalCallTree')
-var EventManager = remixLib.EventManager
+var EventManager = require('../../../src/eventManager')
 var helper = require('./helper')
 
-var TraceManager = remixLib.trace.TraceManager
-var CodeManager = remixLib.code.CodeManager
+var TraceManager = require('../../../src/trace/traceManager')
+var CodeManager = require('../../../src/code/codeManager')
 
 module.exports = function (st, vm, privateKey, contractBytecode, compilationResult, cb) {
   vmCall.sendTx(vm, {nonce: 0, privateKey: privateKey}, null, 0, contractBytecode, function (error, txHash) {

libs/remix-debug/test/decoder/stateTests/mapping.js

@@ -1,6 +1,5 @@
-var remixLib = require('@remix-project/remix-lib')
-var compilerInput = remixLib.helpers.compiler.compilerInput
-var TraceManager = remixLib.trace.TraceManager
+var compilerInput = require('../../helpers/compilerHelper').compilerInput
+var TraceManager = require('../../../src/trace/traceManager')
 
 var compiler = require('solc')
 var stateDecoder = require('../../../src/solidity-decoder/stateDecoder')

libs/remix-debug/test/decoder/storageDecoder.js

@@ -3,8 +3,7 @@ var tape = require('tape')
 var compiler = require('solc')
 var stateDecoder = require('../../src/solidity-decoder/stateDecoder')
 var MockStorageResolver = require('./mockStorageResolver')
-var remixLib = require('@remix-project/remix-lib')
-var compilerInput = remixLib.helpers.compiler.compilerInput
+var compilerInput = require('../helpers/compilerHelper').compilerInput
 var testMappingStorage = require('./stateTests/mapping')
 
 tape('solidity', function (t) {

libs/remix-debug/test/decoder/storageLocation.js

@@ -3,8 +3,7 @@ var tape = require('tape')
 var compiler = require('solc')
 var stateDecoder = require('../../src/solidity-decoder/stateDecoder')
 var contracts = require('./contracts/miscContracts')
-var remixLib = require('@remix-project/remix-lib')
-var compilerInput = remixLib.helpers.compiler.compilerInput
+var compilerInput = require('../helpers/compilerHelper').compilerInput
 
 tape('solidity', function (t) {
   t.test('storage location', function (st) {

libs/remix-debug/test/decoder/vmCall.js

@@ -46,9 +46,7 @@ function createVm (hardfork) {
     hardfork
   })
   vm.blockchain.validate = false
-  const web3vm = new remixLib.vm.Web3VMProvider()
-  web3vm.setVM(vm)
-  return { vm, web3vm, stateManager: vm.stateManager }
+  return { vm, stateManager: vm.stateManager }
 }
 
 /*
@@ -68,17 +66,9 @@ function initVM (st, privateKey) {
     })
   })
 
-  var web3Providers = new remixLib.vm.Web3Providers()
-  web3Providers.addVM('VM', vm)
-  web3Providers.get('VM', function (error, obj) {
-    if (error) {
-      var mes = 'provider TEST not defined'
-      console.log(mes)
-      st.fail(mes)
-    } else {
-      vm.web3 = obj
-    }
-  })
+  var web3Provider = new remixLib.vm.Web3VMProvider()
+  web3Provider.setVM(vm)
+  vm.web3 = web3Provider
   return vm
 }
 

libs/remix-debug/test/helpers/compilerHelper.js

@@ -0,0 +1,26 @@
+module.exports = {
+  compilerInput: compilerInput
+}
+
+function compilerInput (contracts) {
+  return JSON.stringify({
+    language: 'Solidity',
+    sources: {
+      'test.sol': {
+        content: contracts
+      }
+    },
+    settings: {
+      optimizer: {
+        enabled: false,
+        runs: 200
+      },
+      outputSelection: {
+        '*': {
+          '': [ 'legacyAST', 'ast' ],
+          '*': [ 'abi', 'metadata', 'evm.legacyAssembly', 'evm.bytecode', 'evm.deployedBytecode', 'evm.methodIdentifiers', 'evm.gasEstimates' ]
+        }
+      }
+    }
+  })
+}

libs/remix-debug/test/sourceMappingDecoder.js

@@ -1,9 +1,9 @@
 'use strict'
 const tape = require('tape')
 const sourceMapping = require('./resources/sourceMapping')
-const SourceMappingDecoder = require('../src/sourceMappingDecoder')
+const SourceMappingDecoder = require('../src/source/sourceMappingDecoder')
 const compiler = require('solc')
-const compilerInput = require('../src/helpers/compilerHelper').compilerInput
+const compilerInput = require('./helpers/compilerHelper').compilerInput
 
 tape('SourceMappingDecoder', function (t) {
   t.test('SourceMappingDecoder.findNodeAtInstructionIndex', function (st) {

libs/remix-debug/test/tests.js

@@ -1,5 +1,10 @@
 'use strict'
 
+require('./astwalker.js')
+require('./traceManager.js')
+require('./codeManager.js')
+require('./disassembler.js')
+require('./sourceMappingDecoder.js')
 require('./decoder/decodeInfo.js')
 require('./decoder/storageLocation.js')
 require('./decoder/storageDecoder.js')

libs/remix-debug/test/traceManager.js

@@ -1,32 +1,18 @@
 'use strict'
 const TraceManager = require('../src/trace/traceManager')
 const tape = require('tape')
-const Web3Providers = require('../src/web3Provider/web3Providers')
 const web3Test = require('./resources/testWeb3')
 
-let web3 = null
-
 tape('TraceManager', function (t) {
   let traceManager
 
   t.test('TraceManager.init', function (st) {
-    const web3Providers = new Web3Providers()
-    web3Providers.addProvider('TEST', web3Test)
-    web3Providers.get('TEST', function (error, obj) {
-      if (error) {
-        const mes = 'provider TEST not defined'
-        console.log(mes)
-        st.fail(mes)
-      } else {
-        web3 = obj
-        traceManager = new TraceManager({web3: web3})
-        st.end()
-      }
-    })
+    traceManager = new TraceManager({web3: web3Test})
+    st.end()
   })
 
   t.test('TraceManager.resolveTrace', function (st) {
-    const tx = web3.eth.getTransaction('0x20ef65b8b186ca942fcccd634f37074dde49b541c27994fc7596740ef44cfd51')
+    const tx = web3Test.eth.getTransaction('0x20ef65b8b186ca942fcccd634f37074dde49b541c27994fc7596740ef44cfd51')
     traceManager.resolveTrace(tx).then(() => {
       st.end()
     }).catch(() => {

libs/remix-debug/test/vmCall.js

@@ -38,7 +38,6 @@ function sendTx (vm, from, to, value, data, cb) {
 */
 function initVM (privateKey) {
   var VM = require('ethereumjs-vm').default
-  var Web3Providers = remixLib.vm.Web3Providers
   var address = utileth.privateToAddress(privateKey)
   var vm = new VM({
     enableHomestead: true,
@@ -53,16 +52,9 @@ function initVM (privateKey) {
     })
   })
 
-  var web3Providers = new Web3Providers()
-  web3Providers.addVM('VM', vm)
-  web3Providers.get('VM', function (error, obj) {
-    if (error) {
-      var mes = 'provider TEST not defined'
-      console.log(mes)
-    } else {
-      vm.web3 = obj
-    }
-  })
+  var web3Provider = new remixLib.vm.Web3VMProvider()
+  web3Provider.setVM(vm)
+  vm.web3 = web3Provider
   return vm
 }
 

libs/remix-lib/index.js

@@ -1,16 +1,10 @@
 const EventManager = require('./src/eventManager')
-const traceHelper = require('./src/helpers/traceHelper')
 const uiHelper = require('./src/helpers/uiHelper')
 const compilerHelper = require('./src/helpers/compilerHelper')
-const SourceMappingDecoder = require('./src/sourceMappingDecoder')
-const SourceLocationTracker = require('./src/sourceLocationTracker')
-const OffsetToColumnConverter = require('./src/offsetToLineColumnConverter')
-const init = require('./src/init')
 const util = require('./src/util')
 const Web3Providers = require('./src/web3Provider/web3Providers')
 const DummyProvider = require('./src/web3Provider/dummyProvider')
 const Web3VMProvider = require('./src/web3Provider/web3VmProvider')
-const AstWalker = require('./src/astWalker')
 const Storage = require('./src/storage')
 
 const EventsDecoder = require('./src/execution/eventsDecoder')
@@ -19,13 +13,9 @@ const txHelper = require('./src/execution/txHelper')
 const txFormat = require('./src/execution/txFormat')
 const txListener = require('./src/execution/txListener')
 const txRunner = require('./src/execution/txRunner')
-const executionContext = require('./src/execution/execution-context')
+const ExecutionContext = require('./src/execution/execution-context')
 const typeConversion = require('./src/execution/typeConversion')
 
-const CodeManager = require('./src/code/codeManager')
-const BreakpointManager = require('./src/code/breakpointManager')
-const TraceManager = require('./src/trace/traceManager')
-
 const UniversalDApp = require('./src/universalDapp')
 
 if (typeof (module) !== 'undefined' && typeof (module.exports) !== 'undefined') {
@@ -34,16 +24,8 @@ if (typeof (module) !== 'undefined' && typeof (module.exports) !== 'undefined')
 
 function modules () {
   return {
-    code: {
-      CodeManager: CodeManager,
-      BreakpointManager: BreakpointManager
-    },
-    trace: {
-      TraceManager: TraceManager
-    },
     EventManager: EventManager,
     helpers: {
-      trace: traceHelper,
       ui: uiHelper,
       compiler: compilerHelper
     },
@@ -52,18 +34,13 @@ function modules () {
       DummyProvider: DummyProvider,
       Web3VMProvider: Web3VMProvider
     },
-    SourceMappingDecoder: SourceMappingDecoder,
-    SourceLocationTracker: SourceLocationTracker,
-    OffsetToColumnConverter: OffsetToColumnConverter,
     Storage: Storage,
-    init: init,
     util: util,
-    AstWalker: AstWalker,
     execution: {
       EventsDecoder: EventsDecoder,
       txExecution: txExecution,
       txHelper: txHelper,
-      executionContext: new executionContext(),
+      executionContext: new ExecutionContext(),
       txFormat: txFormat,
       txListener: txListener,
       txRunner: txRunner,

libs/remix-lib/src/web3Provider/web3VmProvider.js

@@ -1,18 +1,17 @@
 const util = require('../util')
 const uiutil = require('../helpers/uiHelper')
-const traceHelper = require('../helpers/traceHelper')
 const ethutil = require('ethereumjs-util')
 const Web3 = require('web3')
 
 function web3VmProvider () {
   this.web3 = new Web3()
-  this.vm
+  this.vm = null
   this.vmTraces = {}
   this.txs = {}
   this.txsReceipt = {}
-  this.processingHash
-  this.processingAddress
-  this.processingIndex
+  this.processingHash = null
+  this.processingAddress = null
+  this.processingIndex = null
   this.previousDepth = 0
   this.incr = 0
   this.eth = {}
@@ -26,7 +25,7 @@ function web3VmProvider () {
   this.debug.storageRangeAt = (...args) => this.storageRangeAt(...args)
   this.debug.preimage = (...args) => this.preimage(...args)
   this.providers = { 'HttpProvider': function (url) {} }
-  this.currentProvider = {'host': 'vm provider'}
+  this.currentProvider = { 'host': 'vm provider' }
   this.storageCache = {}
   this.lastProcessedStorageTxHash = {}
   this.sha3Preimages = {}
@@ -168,9 +167,9 @@ web3VmProvider.prototype.pushTrace = function (self, data) {
     error: data.error === false ? undefined : data.error
   }
   self.vmTraces[self.processingHash].structLogs.push(step)
-  if (traceHelper.newContextStorage(step)) {
+  if (step.op === 'CREATE' || step.op === 'CALL') {
     if (step.op === 'CREATE') {
-      this.processingAddress = traceHelper.contractCreationToken(this.processingIndex)
+      this.processingAddress = '(Contract Creation - Step ' + this.processingIndex + ')'
       this.storageCache[this.processingHash][this.processingAddress] = {}
       this.lastProcessedStorageTxHash[this.processingAddress] = this.processingHash
     } else {
@@ -184,7 +183,7 @@ web3VmProvider.prototype.pushTrace = function (self, data) {
       }
     }
   }
-  if (previousopcode && traceHelper.isSHA3Instruction(previousopcode)) {
+  if (previousopcode && previousopcode.op === 'SHA3') {
     const preimage = getSha3Input(previousopcode.stack, previousopcode.memory)
     const imageHash = step.stack[step.stack.length - 1].replace('0x', '')
     self.sha3Preimages[imageHash] = {

libs/remix-lib/test/resources/testWeb3.js

@@ -1,51 +0,0 @@
-'use strict'
-const init = require('../init')
-const web3Override = {}
-web3Override.eth = {}
-web3Override.debug = {}
-let data = init.readFile(require('path').resolve(__dirname, 'testWeb3.json'))
-data = JSON.parse(data)
-
-web3Override.eth.getCode = function (address, callback) {
-  if (callback) {
-    callback(null, data.testCodes[address])
-  } else {
-    return data.testCodes[address]
-  }
-}
-
-web3Override.debug.traceTransaction = function (txHash, options, callback) {
-  callback(null, data.testTraces[txHash])
-}
-
-web3Override.debug.storageRangeAt = function (blockNumber, txIndex, address, start, maxSize, callback) {
-  callback(null, { storage: {}, complete: true })
-}
-
-web3Override.eth.getTransaction = function (txHash, callback) {
-  if (callback) {
-    callback(null, data.testTxs[txHash])
-  } else {
-    return data.testTxs[txHash]
-  }
-}
-
-web3Override.eth.getTransactionFromBlock = function (blockNumber, txIndex, callback) {
-  if (callback) {
-    callback(null, data.testTxsByBlock[blockNumber + '-' + txIndex])
-  } else {
-    return data.testTxsByBlock[blockNumber + '-' + txIndex]
-  }
-}
-
-web3Override.eth.getBlockNumber = function (callback) { callback('web3 modified testing purposes :)') }
-
-web3Override.eth.setProvider = function (provider) {}
-
-web3Override.eth.providers = { 'HttpProvider': function (url) {} }
-
-web3Override.eth.currentProvider = {'host': 'test provider'}
-
-if (typeof (module) !== 'undefined' && typeof (module.exports) !== 'undefined') {
-  module.exports = web3Override
-}

libs/remix-lib/test/tests.js

@@ -1,11 +1,5 @@
-require('./astwalker.js')
 require('./eventManager.js')
-require('./sourceMappingDecoder.js')
 require('./util.js')
 require('./txFormat.js')
 require('./txHelper.js')
-
-require('./traceManager.js')
-require('./codeManager.js')
-require('./disassembler.js')
 require('./txResultHelper.js')

libs/remix-solidity/package.json

@@ -16,7 +16,6 @@
   ],
   "dependencies": {
     "eslint-scope": "^5.0.0",
-    "@remix-project/remix-lib": "0.4.30",
     "solc": "^0.6.0",
     "webworkify-webpack": "^2.1.5"
   },

libs/remix-solidity/src/compiler/compiler.ts

@@ -3,7 +3,7 @@
 import { update } from 'solc/abi'
 import * as webworkify from 'webworkify-webpack'
 import compilerInput from './compiler-input'
-import { EventManager } from '@remix-project/remix-lib'
+import EventManager from '../lib/eventManager'
 import { default as txHelper } from './txHelper';
 import { Source, SourceWithTarget, MessageFromWorker, CompilerState, CompilationResult, 
         visitContractsCallbackParam, visitContractsCallbackInterface, CompilationError, 

libs/remix-solidity/src/lib/eventManager.ts

@@ -0,0 +1,68 @@
+'use strict'
+
+export default class EventManager {
+  registered: any = {} // eslint-disable-line
+  anonymous: any = {} // eslint-disable-line
+
+  /*
+   * Unregister a listener.
+   * Note that if obj is a function. the unregistration will be applied to the dummy obj {}.
+   *
+   * @param {String} eventName  - the event name
+   * @param {Object or Func} obj - object that will listen on this event
+   * @param {Func} func         - function of the listeners that will be executed
+ */
+  unregister (eventName: any, obj: any, func: any): void { // eslint-disable-line
+    if (!this.registered[eventName]) {
+      return
+    }
+    if (obj instanceof Function) {
+      func = obj
+      obj = this.anonymous
+    }
+    for (const reg in this.registered[eventName]) {
+      if (this.registered[eventName][reg].obj === obj && this.registered[eventName][reg].func === func) {
+        this.registered[eventName].splice(reg, 1)
+      }
+    }
+  }
+
+  /*
+   * Register a new listener.
+   * Note that if obj is a function, the function registration will be associated with the dummy object {}
+   *
+   * @param {String} eventName  - the event name
+   * @param {Object or Func} obj - object that will listen on this event
+   * @param {Func} func         - function of the listeners that will be executed
+  */
+  register (eventName: any, obj: any, func: any): void { // eslint-disable-line
+    if (!this.registered[eventName]) {
+      this.registered[eventName] = []
+    }
+    if (obj instanceof Function) {
+      func = obj
+      obj = this.anonymous
+    }
+    this.registered[eventName].push({
+      obj: obj,
+      func: func
+    })
+  }
+
+  /*
+   * trigger event.
+   * Every listener have their associated function executed
+   *
+   * @param {String} eventName  - the event name
+   * @param {Array}j - argument that will be passed to the executed function.
+  */
+  trigger (eventName: any, args: any): void { // eslint-disable-line
+    if (!this.registered[eventName]) {
+      return
+    }
+    for (const listener in this.registered[eventName]) {
+      const l = this.registered[eventName][listener]
+      l.func.apply(l.obj === this.anonymous ? {} : l.obj, args)
+    }
+  }
+}