diff --git a/libs/remix-debug/package.json b/libs/remix-debug/package.json
index 3659c0d4ae..5be0192f86 100644
--- a/libs/remix-debug/package.json
+++ b/libs/remix-debug/package.json
@@ -24,6 +24,7 @@
     "@ethereumjs/vm": "^5.5.0",
     "@remix-project/remix-astwalker": "^0.0.37",
     "@remix-project/remix-lib": "^0.5.7",
+    "@remix-project/remix-simulator": "^0.2.7",
     "async": "^2.6.2",
     "commander": "^2.19.0",
     "deep-equal": "^1.0.1",
diff --git a/libs/remix-debug/test/debugger.ts b/libs/remix-debug/test/debugger.ts
index ff859f7d4d..8ce4bed268 100644
--- a/libs/remix-debug/test/debugger.ts
+++ b/libs/remix-debug/test/debugger.ts
@@ -7,7 +7,6 @@ import { BreakpointManager } from '../src/code/breakpointManager'
 
 var compiler = require('solc')
 var vmCall = require('./vmCall')
-var remixLib = require('@remix-project/remix-lib')
 
 var ballot = `pragma solidity >=0.4.22 <0.8.0;
 
@@ -151,19 +150,17 @@ contract Ballot {
 `;
 
 (async () => {
-  var privateKey = Buffer.from('dae9801649ba2d95a21e688b56f77905e5667c44ce868ec83f82e838712a2c7a', 'hex')
-  var vm = await vmCall.initVM(privateKey)
+  var privateKey = Buffer.from('503f38a9c967ed597e47fe25643985f032b072db8075426a92110f82df48dfcb', 'hex')
   var output = compiler.compile(compilerInput(ballot))
   output = JSON.parse(output)
-  var web3VM = new remixLib.vm.Web3VMProvider()
-  web3VM.setVM(vm)
   const param = '0000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000000148656c6c6f20576f726c64210000000000000000000000000000000000000000'
-  vmCall.sendTx(vm, {nonce: 0, privateKey: privateKey}, null, 0, output.contracts['test.sol']['Ballot'].evm.bytecode.object + param, (error, txHash) => {
-    console.log(error, txHash)
+  const web3 = await vmCall.getWeb3()
+  vmCall.sendTx(web3, {nonce: 0, privateKey: privateKey}, null, 0, output.contracts['test.sol']['Ballot'].evm.bytecode.object + param, (error, hash) => {
+    console.log(error, hash)
     if (error) {
       throw error
     } else {
-      web3VM.eth.getTransaction(txHash, (error, tx) => {
+      web3.eth.getTransaction(hash, (error, tx) => {
         if (error) {
           throw error
         } else {
@@ -171,7 +168,7 @@ contract Ballot {
             compilationResult: function () {
               return { data: output }
             },
-            web3: web3VM
+            web3: web3
           })
   
           debugManager.callTree.event.register('callTreeReady', () => {
@@ -230,7 +227,7 @@ function testDebugging (debugManager) {
       var storageView = debugManager.storageViewAt(196, address)
 
       storageView.storageRange().then((storage) => {
-        t.equal(JSON.stringify(storage), JSON.stringify({ '0x290decd9548b62a8d60345a988386fc84ba6bc95484008f6362f93160ef3e563': { key: '0x0000000000000000000000000000000000000000000000000000000000000000', value: '0x0000000000000000000000004b0897b0513fdc7c541b6d9d7e929c4e5364d2db' } }))
+        t.equal(JSON.stringify(storage), JSON.stringify({ '0x290decd9548b62a8d60345a988386fc84ba6bc95484008f6362f93160ef3e563': { key: '0x0000000000000000000000000000000000000000000000000000000000000000', value: '0x0000000000000000000000005b38da6a701c568545dcfcb03fcb875f56beddc4' } }))
       }).catch((error) => {
         if (error) return t.end(error)
       })
@@ -245,7 +242,7 @@ function testDebugging (debugManager) {
       const state = await debugManager.extractStateAt(312)
       const decodedState = await debugManager.decodeStateAt(312, state)
       console.log(decodedState)
-      t.equal(decodedState['chairperson'].value, '0x4B0897B0513FDC7C541B6D9D7E929C4E5364D2DB')
+      t.equal(decodedState['chairperson'].value, '0x5B38DA6A701C568545DCFCB03FCB875F56BEDDC4')
       t.equal(decodedState['chairperson'].type, 'address')
       t.equal(decodedState['proposals'].value[0].value.voteCount.value, '0')
       t.equal(decodedState['proposals'].value[0].value.voteCount.type, 'uint256')
@@ -259,13 +256,14 @@ function testDebugging (debugManager) {
 
   tape('traceManager.decodeLocalsAt', async (t) => {
     t.plan(1)
-    const tested = JSON.parse('{"proposalNames":{"value":[{"value":"0x48656C6C6F20576F726C64210000000000000000000000000000000000000000","type":"bytes32"}],"length":"0x1","type":"bytes32[]","cursor":1,"hasNext":false},"p":{"value":"45","type":"uint256"},"addressLocal":{"value":"0x4B0897B0513FDC7C541B6D9D7E929C4E5364D2DB","type":"address"},"i":{"value":"2","type":"uint256"},"proposalsLocals":{"value":[{"value":{"name":{"value":"0x48656C6C6F20576F726C64210000000000000000000000000000000000000000","type":"bytes32"},"voteCount":{"value":"0","type":"uint256"}},"type":"struct Ballot.Proposal"}],"length":"0x1","type":"struct Ballot.Proposal[]"}}')
+    const tested = JSON.parse('{"proposalNames":{"value":[{"value":"0x48656C6C6F20576F726C64210000000000000000000000000000000000000000","type":"bytes32"}],"length":"0x1","type":"bytes32[]","cursor":1,"hasNext":false},"p":{"value":"45","type":"uint256"},"addressLocal":{"value":"0x5B38DA6A701C568545DCFCB03FCB875F56BEDDC4","type":"address"},"i":{"value":"2","type":"uint256"},"proposalsLocals":{"value":[{"value":{"name":{"value":"0x48656C6C6F20576F726C64210000000000000000000000000000000000000000","type":"bytes32"},"voteCount":{"value":"0","type":"uint256"}},"type":"struct Ballot.Proposal"}],"length":"0x1","type":"struct Ballot.Proposal[]"}}')
     try {
       const address = debugManager.traceManager.getCurrentCalledAddressAt(327)
       const location = await debugManager.sourceLocationFromVMTraceIndex(address, 327)
       debugManager.decodeLocalsAt(327, location, (error, decodedlocals) => {
         if (error) return t.end(error)
-        t.ok(deepequal(decodedlocals, tested), `locals does not match. expected: ${JSON.stringify(tested)} - current: ${decodedlocals}`)
+        const res = deepequal(decodedlocals, tested)
+        t.ok(res, `test if locals does match. expected: ${JSON.stringify(tested)} - current: ${JSON.stringify(decodedlocals)}`)
       })
     } catch (error) {
       return t.end(error)
diff --git a/libs/remix-debug/test/decoder/localDecoder.ts b/libs/remix-debug/test/decoder/localDecoder.ts
index 2a8f4f8997..fc79752e08 100644
--- a/libs/remix-debug/test/decoder/localDecoder.ts
+++ b/libs/remix-debug/test/decoder/localDecoder.ts
@@ -5,7 +5,7 @@ var intLocal = require('./contracts/intLocal')
 var miscLocal = require('./contracts/miscLocal')
 var structArrayLocal = require('./contracts/structArrayLocal')
 var calldataLocal = require('./contracts/calldata')
-var vmCall = require('./vmCall')
+var vmCall = require('../vmCall')
 var intLocalTest = require('./localsTests/int')
 var miscLocalTest = require('./localsTests/misc')
 var misc2LocalTest = require('./localsTests/misc2')
@@ -15,29 +15,28 @@ var compilerInput = require('../helpers/compilerHelper').compilerInput
 
 tape('solidity', function (t) {
   t.test('local decoder', async function (st) {
-    var privateKey = Buffer.from('dae9801649ba2d95a21e688b56f77905e5667c44ce868ec83f82e838712a2c7a', 'hex')
-    var vm = await vmCall.initVM(st, privateKey)
-    await test(st, vm, privateKey)
+    var privateKey = Buffer.from('503f38a9c967ed597e47fe25643985f032b072db8075426a92110f82df48dfcb', 'hex')
+    await test(st, privateKey)
   })
 })
 
-async function test (st, vm, privateKey) {
+async function test (st, privateKey) {
   var output = compiler.compile(compilerInput(intLocal.contract))
   output = JSON.parse(output)
-  await intLocalTest(st, vm, privateKey, output.contracts['test.sol']['intLocal'].evm.bytecode.object, output)
+  await intLocalTest(st, privateKey, output.contracts['test.sol']['intLocal'].evm.bytecode.object, output)
   output = compiler.compile(compilerInput(miscLocal.contract))
   output = JSON.parse(output)
-  await miscLocalTest(st, vm, privateKey, output.contracts['test.sol']['miscLocal'].evm.bytecode.object, output)
+  await miscLocalTest(st, privateKey, output.contracts['test.sol']['miscLocal'].evm.bytecode.object, output)
   output = compiler.compile(compilerInput(miscLocal.contract))
   output = JSON.parse(output)
-  await misc2LocalTest(st, vm, privateKey, output.contracts['test.sol']['miscLocal2'].evm.bytecode.object, output)
+  await misc2LocalTest(st, privateKey, output.contracts['test.sol']['miscLocal2'].evm.bytecode.object, output)
   output = compiler.compile(compilerInput(structArrayLocal.contract))
   output = JSON.parse(output)
-  await structArrayLocalTest(st, vm, privateKey, output.contracts['test.sol']['structArrayLocal'].evm.bytecode.object, output)
+  await structArrayLocalTest(st, privateKey, output.contracts['test.sol']['structArrayLocal'].evm.bytecode.object, output)
 
   output = compiler.compile(compilerInput(calldataLocal.contract))
   output = JSON.parse(output)
-  await calldataLocalTest(st, vm, privateKey, output.contracts['test.sol']['calldataLocal'].evm.bytecode.object, output)
+  await calldataLocalTest(st, privateKey, output.contracts['test.sol']['calldataLocal'].evm.bytecode.object, output)
 
   st.end()
 }
diff --git a/libs/remix-debug/test/decoder/localsTests/calldata.ts b/libs/remix-debug/test/decoder/localsTests/calldata.ts
index 8f7d3b5fa8..2cab6ced8d 100644
--- a/libs/remix-debug/test/decoder/localsTests/calldata.ts
+++ b/libs/remix-debug/test/decoder/localsTests/calldata.ts
@@ -1,7 +1,7 @@
 'use strict'
 
 import deepequal from 'deep-equal'
-import { sendTx } from '../vmCall'
+import * as vmCall from '../../vmCall'
 import { TraceManager } from '../../../src/trace/traceManager'
 import { CodeManager } from '../../../src/code/codeManager'
 import { SolidityProxy } from '../../../src/solidity-decoder/solidityProxy'
@@ -9,23 +9,26 @@ import { InternalCallTree } from '../../../src/solidity-decoder/internalCallTree
 import { EventManager } from '../../../src/eventManager'
 import * as helper from './helper'
 
-module.exports = async function (st, vm, privateKey, contractBytecode, compilationResult) {
+module.exports = async function (st, privateKey, contractBytecode, compilationResult) {
   let txHash
+  let web3
   try {
-    let data = await sendTx(vm, { nonce: 0, privateKey: privateKey }, null, 0, contractBytecode)
-    const to = (data as any).result.createdAddress.toString()
+    web3 = await (vmCall as any).getWeb3()
+    let hash = await (vmCall as any).sendTx(web3, { nonce: 0, privateKey: privateKey }, null, 0, contractBytecode)
+    const receipt = await web3.eth.getTransactionReceipt(hash)
+    const to = receipt.contractAddress
+    console.log('to', to)
     // call to level11
-    data = await sendTx(vm, { nonce: 1, privateKey: privateKey }, to, 0, 'a372a595000000000000000000000000000000000000000000000000000000000000000300000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000000000000000000000000000000000000000800000000000000000000000000000000000000000000000000000000000000001520000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000015400000000000000000000000000000000000000000000000000000000000000')
-    txHash = (data as any).hash
+    txHash = await (vmCall as any).sendTx(web3, { nonce: 1, privateKey: privateKey }, to, 0, 'a372a595000000000000000000000000000000000000000000000000000000000000000300000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000000000000000000000000000000000000000800000000000000000000000000000000000000000000000000000000000000001520000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000015400000000000000000000000000000000000000000000000000000000000000')
   } catch (e) {
     return st.fail(e)
   }
-  return new Promise((resolve) => {    
-    vm.web3.eth.getTransaction(txHash, function (error, tx) {
+  return new Promise((resolve) => {
+    web3.eth.getTransaction(txHash, function (error, tx) {
       if (error) {
         return st.fail(error)
       }
-      var traceManager = new TraceManager({ web3: vm.web3 })
+      var traceManager = new TraceManager({ web3 })
       var codeManager = new CodeManager(traceManager)
       codeManager.clear()
       var solidityProxy = new SolidityProxy({ getCurrentCalledAddressAt: traceManager.getCurrentCalledAddressAt.bind(traceManager), getCode: codeManager.getCode.bind(codeManager) })
diff --git a/libs/remix-debug/test/decoder/localsTests/int.ts b/libs/remix-debug/test/decoder/localsTests/int.ts
index b8e0200ff5..9bf1c4307f 100644
--- a/libs/remix-debug/test/decoder/localsTests/int.ts
+++ b/libs/remix-debug/test/decoder/localsTests/int.ts
@@ -1,6 +1,6 @@
 'use strict'
 
-import { sendTx } from '../vmCall'
+import * as vmCall from '../../vmCall'
 import { TraceManager } from '../../../src/trace/traceManager'
 import { CodeManager } from '../../../src/code/codeManager'
 import { contractCreationToken } from '../../../src/trace/traceHelper'
@@ -9,19 +9,19 @@ import { InternalCallTree } from '../../../src/solidity-decoder/internalCallTree
 import { EventManager } from '../../../src/eventManager'
 import * as helper from './helper'
 
-module.exports = function (st, vm, privateKey, contractBytecode, compilationResult) {
-  return new Promise((resolve) => {
-    sendTx(vm, { nonce: 0, privateKey: privateKey }, null, 0, contractBytecode, function (error, data) {      
+module.exports = function (st, privateKey, contractBytecode, compilationResult) {
+  return new Promise(async (resolve) => {    
+    let web3 = await (vmCall as any).getWeb3();
+    (vmCall as any).sendTx(web3, { nonce: 0, privateKey: privateKey }, null, 0, contractBytecode, function (error, hash) {      
       if (error) {
         return st.fail(error)
       }
-      const txHash = data.hash
-      vm.web3.eth.getTransaction(txHash, function (error, tx) {
+      web3.eth.getTransaction(hash, function (error, tx) {
         if (error) {
           return st.fail(error)
         }
         tx.to = contractCreationToken('0')
-        var traceManager = new TraceManager({ web3: vm.web3 })
+        var traceManager = new TraceManager({ web3 })
         var codeManager = new CodeManager(traceManager)
         codeManager.clear()
         var solidityProxy = new SolidityProxy({ getCurrentCalledAddressAt: traceManager.getCurrentCalledAddressAt.bind(traceManager), getCode: codeManager.getCode.bind(codeManager) })
@@ -125,6 +125,6 @@ module.exports = function (st, vm, privateKey, contractBytecode, compilationResu
         })
       })
     })
-  })  
+  })
 }
 
diff --git a/libs/remix-debug/test/decoder/localsTests/misc.ts b/libs/remix-debug/test/decoder/localsTests/misc.ts
index 7d59d2fbe7..6caaa01311 100644
--- a/libs/remix-debug/test/decoder/localsTests/misc.ts
+++ b/libs/remix-debug/test/decoder/localsTests/misc.ts
@@ -1,5 +1,5 @@
 'use strict'
-import { sendTx } from '../vmCall'
+import * as vmCall from '../../vmCall'
 import { contractCreationToken } from '../../../src/trace/traceHelper'
 import { SolidityProxy } from '../../../src/solidity-decoder/solidityProxy'
 import { InternalCallTree } from '../../../src/solidity-decoder/internalCallTree'
@@ -8,19 +8,19 @@ import * as helper from './helper'
 import { TraceManager } from '../../../src/trace/traceManager'
 import { CodeManager } from '../../../src/code/codeManager'
 
-module.exports = function (st, vm, privateKey, contractBytecode, compilationResult) {
-  return new Promise((resolve) => {
-    sendTx(vm, { nonce: 0, privateKey: privateKey }, null, 0, contractBytecode, function (error, data) {      
+module.exports = function (st, privateKey, contractBytecode, compilationResult) {
+  return new Promise(async (resolve) => {
+    const web3 = await (vmCall as any).getWeb3();
+    (vmCall as any).sendTx(web3, { nonce: 0, privateKey: privateKey }, null, 0, contractBytecode, function (error, hash) {      
       if (error) {
         return st.fail(error)
       }
-      const txHash = data.hash
-      vm.web3.eth.getTransaction(txHash, function (error, tx) {
+      web3.eth.getTransaction(hash, function (error, tx) {
         if (error) {
           return st.fail(error)
         }
         tx.to = contractCreationToken('0')
-        var traceManager = new TraceManager({ web3: vm.web3 })
+        var traceManager = new TraceManager({ web3 })
         var codeManager = new CodeManager(traceManager)
         codeManager.clear()
         var solidityProxy = new SolidityProxy({ getCurrentCalledAddressAt: traceManager.getCurrentCalledAddressAt.bind(traceManager), getCode: codeManager.getCode.bind(codeManager) })
@@ -36,7 +36,7 @@ module.exports = function (st, vm, privateKey, contractBytecode, compilationResu
               st.equals(locals['boolFalse'].value, false)
               st.equals(locals['boolTrue'].value, true)
               st.equals(locals['testEnum'].value, 'three')
-              st.equals(locals['sender'].value, '0x4B0897B0513FDC7C541B6D9D7E929C4E5364D2DB')
+              st.equals(locals['sender'].value, '0x5B38DA6A701C568545DCFCB03FCB875F56BEDDC4')
               st.equals(locals['_bytes1'].value, '0x99')
               st.equals(locals['__bytes1'].value, '0x99')
               st.equals(locals['__bytes2'].value, '0x99AB')
diff --git a/libs/remix-debug/test/decoder/localsTests/misc2.ts b/libs/remix-debug/test/decoder/localsTests/misc2.ts
index f28e0a2cde..813db7542a 100644
--- a/libs/remix-debug/test/decoder/localsTests/misc2.ts
+++ b/libs/remix-debug/test/decoder/localsTests/misc2.ts
@@ -1,5 +1,5 @@
 'use strict'
-import { sendTx } from '../vmCall'
+import * as vmCall from '../../vmCall'
 import { contractCreationToken } from '../../../src/trace/traceHelper'
 import { SolidityProxy } from '../../../src/solidity-decoder/solidityProxy'
 import { InternalCallTree } from '../../../src/solidity-decoder/internalCallTree'
@@ -8,19 +8,19 @@ import * as helper from './helper'
 import { TraceManager } from '../../../src/trace/traceManager'
 import { CodeManager } from '../../../src/code/codeManager'
 
-module.exports = function (st, vm, privateKey, contractBytecode, compilationResult) {
-  return new Promise((resolve) => {
-    sendTx(vm, { nonce: 0, privateKey: privateKey }, null, 0, contractBytecode, function (error, data) {
+module.exports = function (st, privateKey, contractBytecode, compilationResult) {
+  return new Promise(async (resolve) => {
+    const web3 = await (vmCall as any).getWeb3();
+    (vmCall as any).sendTx(web3, { nonce: 0, privateKey: privateKey }, null, 0, contractBytecode, function (error, hash) {
       if (error) {
         return st.fail(error)
       }
-      const txHash = data.hash
-      vm.web3.eth.getTransaction(txHash, function (error, tx) {
+      web3.eth.getTransaction(hash, function (error, tx) {
         if (error) {
           return st.fail(error)
         }
         tx.to = contractCreationToken('0')
-        var traceManager = new TraceManager({ web3: vm.web3 })
+        var traceManager = new TraceManager({ web3 })
         var codeManager = new CodeManager(traceManager)
         codeManager.clear()
         var solidityProxy = new SolidityProxy({ getCurrentCalledAddressAt: traceManager.getCurrentCalledAddressAt.bind(traceManager), getCode: codeManager.getCode.bind(codeManager) })
diff --git a/libs/remix-debug/test/decoder/localsTests/structArray.ts b/libs/remix-debug/test/decoder/localsTests/structArray.ts
index 9041e9ea7b..725674ee8c 100644
--- a/libs/remix-debug/test/decoder/localsTests/structArray.ts
+++ b/libs/remix-debug/test/decoder/localsTests/structArray.ts
@@ -1,5 +1,5 @@
 'use strict'
-import { sendTx } from '../vmCall'
+import * as vmCall from '../../vmCall'
 import { contractCreationToken } from '../../../src/trace/traceHelper'
 import { SolidityProxy } from '../../../src/solidity-decoder/solidityProxy'
 import { InternalCallTree } from '../../../src/solidity-decoder/internalCallTree'
@@ -8,19 +8,19 @@ import * as helper from './helper'
 import { TraceManager } from '../../../src/trace/traceManager'
 import { CodeManager } from '../../../src/code/codeManager'
 
-module.exports = function (st, vm, privateKey, contractBytecode, compilationResult) {
-  return new Promise((resolve) => {
-    sendTx(vm, { nonce: 0, privateKey: privateKey }, null, 0, contractBytecode, function (error, data) {
+module.exports = function (st, privateKey, contractBytecode, compilationResult) {
+  return new Promise(async (resolve) => {
+    const web3 = await (vmCall as any).getWeb3();
+    (vmCall as any).sendTx(web3, { nonce: 0, privateKey: privateKey }, null, 0, contractBytecode, function (error, hash) {
       if (error) {
         return st.fail(error)
       }
-      const txHash = data.hash
-      vm.web3.eth.getTransaction(txHash, function (error, tx) {
+      web3.eth.getTransaction(hash, function (error, tx) {
         if (error) {
           return st.fail(error)
         }
         tx.to = contractCreationToken('0')
-        var traceManager = new TraceManager({ web3: vm.web3 })
+        var traceManager = new TraceManager({ web3 })
         var codeManager = new CodeManager(traceManager)
         codeManager.clear()
         var solidityProxy = new SolidityProxy({ getCurrentCalledAddressAt: traceManager.getCurrentCalledAddressAt.bind(traceManager), getCode: codeManager.getCode.bind(codeManager) })
diff --git a/libs/remix-debug/test/decoder/stateTests/mapping.ts b/libs/remix-debug/test/decoder/stateTests/mapping.ts
index 671bf4b9b6..f2467efb29 100644
--- a/libs/remix-debug/test/decoder/stateTests/mapping.ts
+++ b/libs/remix-debug/test/decoder/stateTests/mapping.ts
@@ -2,57 +2,59 @@ import { compilerInput } from '../../helpers/compilerHelper'
 import { TraceManager } from '../../../src/trace/traceManager'
 import { compile } from 'solc'
 import * as stateDecoder from '../../../src/solidity-decoder/stateDecoder'
-import { sendTx, initVM } from '../vmCall'
+import * as vmCall from '../../vmCall'
 import { StorageResolver } from '../../../src/storage/storageResolver'
 import { StorageViewer } from '../../../src/storage/storageViewer'
+import {  Address, bufferToHex } from 'ethereumjs-util'
 
 module.exports = async function testMappingStorage (st, cb) {
   var mappingStorage = require('../contracts/mappingStorage')
-  var privateKey = Buffer.from('dae9801649ba2d95a21e688b56f77905e5667c44ce868ec83f82e838712a2c7a', 'hex')
-  var vm = await initVM(st, privateKey)
+  var privateKey = Buffer.from('503f38a9c967ed597e47fe25643985f032b072db8075426a92110f82df48dfcb', 'hex')
   var output = compile(compilerInput(mappingStorage.contract))
-  output = JSON.parse(output)
-  sendTx(vm, {nonce: 0, privateKey: privateKey}, null, 0, output.contracts['test.sol']['SimpleMappingState'].evm.bytecode.object, function (error, data) {
+  output = JSON.parse(output);
+  const web3 = await (vmCall as any).getWeb3();
+  (vmCall as any).sendTx(web3, {nonce: 0, privateKey: privateKey}, null, 0, output.contracts['test.sol']['SimpleMappingState'].evm.bytecode.object, function (error, hash) {
     if (error) {
       console.log(error)
       st.end(error)
     } else {
-      const txHash = data.hash
-      vm.web3.eth.getTransaction(txHash, (error, tx) => {
+      web3.eth.getTransactionReceipt(hash, (error, tx) => {
         if (error) {
           console.log(error)
           st.end(error)
         } else {
-          testMapping(st, vm, privateKey, tx.contractAddress, output, cb)
+          // const storage = await this.vm.stateManager.dumpStorage(data.to)
+          // (vmCall as any).web3().eth.getCode(tx.contractAddress).then((code) => console.log('code:', code))
+          // (vmCall as any).web3().debug.traceTransaction(hash).then((code) => console.log('trace:', code))
+          testMapping(st, privateKey, tx.contractAddress, output, web3, cb)
+          // st.end()
         }
       })
     }
   })
 }
 
-function testMapping (st, vm, privateKey, contractAddress, output, cb) {
-  sendTx(vm, {nonce: 1, privateKey: privateKey}, contractAddress, 0, '2fd0a83a00000000000000000000000000000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000000000040000000000000000000000000000000000000000000000000000000000000001074686973206973206120737472696e6700000000000000000000000000000000',
-        function (error, data) {
+function testMapping (st, privateKey, contractAddress, output, web3, cb) {
+  (vmCall as any).sendTx(web3, {nonce: 1, privateKey: privateKey}, contractAddress, 0, '2fd0a83a00000000000000000000000000000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000000000040000000000000000000000000000000000000000000000000000000000000001074686973206973206120737472696e6700000000000000000000000000000000',
+        function (error, hash) {
           if (error) {
             console.log(error)
             st.end(error)
-          } else {
-            const txHash = data.hash
-            vm.web3.eth.getTransaction(txHash, (error, tx) => {
+          } else {            
+            web3.eth.getTransaction(hash, (error, tx) => {
               if (error) {
                 console.log(error)
                 st.end(error)
               } else {
-                var traceManager = new TraceManager({web3: vm.web3})
+                var traceManager = new TraceManager({web3})
                 traceManager.resolveTrace(tx).then(() => {
                   var storageViewer = new StorageViewer({
                     stepIndex: 268,
                     tx: tx,
                     address: contractAddress
-                  }, new StorageResolver({web3: vm.web3}), traceManager)
+                  }, new StorageResolver({web3}), traceManager)
                   var stateVars = stateDecoder.extractStateVariables('SimpleMappingState', output.sources)
                   stateDecoder.decodeState(stateVars, storageViewer).then((result) => {
-                    console.log('ok', JSON.stringify(result))
                     st.equal(result['_num'].value, '1')
                     st.equal(result['_num'].type, 'uint256')
                     st.equal(result['_iBreakSolidityState'].type, 'mapping(string => uint256)')
diff --git a/libs/remix-debug/test/decoder/vmCall.ts b/libs/remix-debug/test/decoder/vmCall.ts
deleted file mode 100644
index a0d2040e7c..0000000000
--- a/libs/remix-debug/test/decoder/vmCall.ts
+++ /dev/null
@@ -1,76 +0,0 @@
-'use strict'
-import { Transaction as Tx } from '@ethereumjs/tx'
-import { Block } from '@ethereumjs/block'
-import { BN, bufferToHex, Address } from 'ethereumjs-util'
-import { vm as remixlibVM } from '@remix-project/remix-lib'
-import VM from '@ethereumjs/vm'
-import Common from '@ethereumjs/common'
-
-export function sendTx (vm, from, to, value, data, cb?) {
-  cb = cb || (() => {})
-  return new Promise ((resolve, reject) => {
-    var tx = new Tx({
-      nonce: new BN(from.nonce++),
-      // gasPrice: new BN(1),
-      gasLimit: new BN(3000000, 10),
-      to: to,
-      value: new BN(value, 10),
-      data: Buffer.from(data, 'hex')
-    })
-    tx = tx.sign(from.privateKey)
-  
-    var block = Block.fromBlockData({
-      header: {
-        timestamp: new Date().getTime() / 1000 | 0,
-        number: 0
-      }
-    }) // still using default common
-  
-    try {
-      vm.runTx({block: block, tx: tx, skipBalance: true, skipNonce: true}).then(function (result) {
-        setTimeout(() => {
-          const hash = bufferToHex(tx.hash())
-          cb(null, { hash, result })
-          resolve({ hash, result })
-        }, 500)
-      }).catch((error) => {
-        console.error(error)
-        cb(error)
-        reject(error)
-      })
-    } catch (e) {
-      console.error(e)
-    }
-  })
-}
-
-async function createVm (hardfork) {
-  const common = new Common({ chain: 'mainnet', hardfork })
-  const vm = new VM({ common })   
-  await vm.init()
-  return { vm, stateManager: vm.stateManager }
-}
-
-/*
-  Init VM / Send Transaction
-*/
-export async function initVM (st, privateKey) {
-  var VM = await createVm('berlin')
-  const vm = VM.vm
-
-  var address = Address.fromPrivateKey(privateKey)
-
-  try {
-    let account = await vm.stateManager.getAccount(address)
-    account.balance = new BN('f00000000000000001', 16)
-    await vm.stateManager.putAccount(address, account)
-  } catch (error) {
-    console.log(error)
-  }
-  
-  var web3Provider = new remixlibVM.Web3VMProvider()
-  web3Provider.setVM(vm)
-  vm.web3 = web3Provider
-  return vm
-}
-
diff --git a/libs/remix-debug/test/tests.ts b/libs/remix-debug/test/tests.ts
index b105d02f12..87f8c01972 100644
--- a/libs/remix-debug/test/tests.ts
+++ b/libs/remix-debug/test/tests.ts
@@ -1,5 +1,5 @@
 'use strict'
-
+require('./vmCall')
 require('./traceManager')
 require('./codeManager')
 require('./disassembler')
diff --git a/libs/remix-debug/test/vmCall.ts b/libs/remix-debug/test/vmCall.ts
index a640c4d1b8..d8d400c58c 100644
--- a/libs/remix-debug/test/vmCall.ts
+++ b/libs/remix-debug/test/vmCall.ts
@@ -1,63 +1,44 @@
 'use strict'
 import { Block } from '@ethereumjs/block'
+import { Transaction } from '@ethereumjs/tx'
 import VM from '@ethereumjs/vm'
+import { rlp, keccak, bufferToHex } from 'ethereumjs-util'
+import { extendWeb3 } from '../src/init' 
 var utileth = require('ethereumjs-util')
 var Tx = require('@ethereumjs/tx').Transaction
 var BN = require('ethereumjs-util').BN
 var remixLib = require('@remix-project/remix-lib')
+const { Provider, extend } = require('@remix-project/remix-simulator')
+const Web3 = require('web3')
 
-function sendTx (vm, from, to, value, data, cb) {
-  var tx = new Tx({
-    nonce: new BN(from.nonce++),
-    // gasPrice: new BN(1),
-    gasLimit: new BN(3000000, 10),
-    to: to,
-    value: new BN(value, 10),
-    data: Buffer.from(data, 'hex')
-  })
-  tx = tx.sign(from.privateKey)
 
-  var block = Block.fromBlockData({
-    header: {
-      timestamp: new Date().getTime() / 1000 | 0,
-      number: 0
-    }
-  }) // still using default common
-  vm.runTx({block: block, tx: tx, skipBalance: true, skipNonce: true}).then(function (result) {
-    setTimeout(() => {
-      cb(null, utileth.bufferToHex(tx.hash()))
-    }, 500)
-  }).catch((error) => {
-    console.error(error)
-    cb(error)
-  })
+async function getWeb3 () {
+  const remixSimulatorProvider = new Provider({ fork: 'berlin' })
+  await remixSimulatorProvider.init()
+  await remixSimulatorProvider.Accounts.resetAccounts()
+  const web3 = new Web3(remixSimulatorProvider)
+  extendWeb3(web3)
+  return web3
 }
 
-/*
-  Init VM / Send Transaction
-*/
-async function initVM (privateKey) {
-  var address = utileth.Address.fromPrivateKey(privateKey)
-  var vm = new VM({
-    activatePrecompiles: true
-  })
-  await vm.init()
-
+async function sendTx (web3, from, to, value, data, cb) {
   try {
-    let account = await vm.stateManager.getAccount(address)
-    account.balance = new BN('f00000000000000001', 16)
-    await vm.stateManager.putAccount(address, account)
-  } catch (error) {
-    console.log(error)
-  } 
-
-  var web3Provider = new remixLib.vm.Web3VMProvider()
-  web3Provider.setVM(vm)
-  vm.web3 = web3Provider
-  return vm
+    cb = cb || (() => {})
+    const receipt = await web3.eth.sendTransaction({
+      from: utileth.Address.fromPrivateKey(from.privateKey).toString('hex'),
+      to,
+      value,
+      data,
+      gas: 7000000
+    })
+    cb(null, receipt.transactionHash)
+    return receipt.transactionHash
+  } catch (e) {
+    cb(e)
+  }
 }
 
 module.exports = {
-  sendTx: sendTx,
-  initVM: initVM
+  sendTx,
+  getWeb3
 }
diff --git a/libs/remix-simulator/src/vm-context.ts b/libs/remix-simulator/src/vm-context.ts
index b9cb6a4151..a562331f9c 100644
--- a/libs/remix-simulator/src/vm-context.ts
+++ b/libs/remix-simulator/src/vm-context.ts
@@ -24,31 +24,27 @@ class StateManagerCommonStorageDump extends StateManager {
     return super.putContractStorage(address, key, value)
   }
 
-  async dumpStorage (address) {
-    let trie
-    try {
-      trie = await this._getStorageTrie(address)
-    } catch (e) {
-      console.log(e)
-      throw e
-    }
-    return new Promise<StorageDump>((resolve, reject) => {
-      try {
-        const storage = {}
-        const stream = trie.createReadStream()
-        stream.on('data', (val) => {
-          const value = rlp.decode(val.value)
-          storage['0x' + val.key.toString('hex')] = {
-            key: this.keyHashes[val.key.toString('hex')],
-            value: '0x' + value.toString('hex')
-          }
+  async dumpStorage (address): Promise<StorageDump> {
+    return new Promise((resolve, reject) => {
+      this._getStorageTrie(address)
+        .then((trie) => {
+          const storage = {}
+          const stream = trie.createReadStream()
+
+          stream.on('data', (val) => {
+            const value = rlp.decode(val.value)
+            storage['0x' + val.key.toString('hex')] = {
+              key: this.keyHashes[val.key.toString('hex')],
+              value: '0x' + value.toString('hex')
+            }
+          })
+          stream.on('end', () => {
+            resolve(storage)
+          })
         })
-        stream.on('end', function () {
-          resolve(storage)
+        .catch((e) => {
+          reject(e)
         })
-      } catch (e) {
-        reject(e)
-      }
     })
   }
 
@@ -60,18 +56,17 @@ class StateManagerCommonStorageDump extends StateManager {
   }
 
   async setStateRoot (stateRoot) {
-    await this._cache.flush()
-
-    if (stateRoot === this._trie.EMPTY_TRIE_ROOT) {
-      this._trie.root = stateRoot
-      this._cache.clear()
-      this._storageTries = {}
-      return
+    if (this._checkpointCount !== 0) {
+      throw new Error('Cannot set state root with uncommitted checkpoints')
     }
 
-    const hasRoot = await this._trie.checkRoot(stateRoot)
-    if (!hasRoot) {
-      throw new Error('State trie does not contain state root')
+    await this._cache.flush()
+
+    if (!stateRoot.equals(this._trie.EMPTY_TRIE_ROOT)) {
+      const hasRoot = await this._trie.checkRoot(stateRoot)
+      if (!hasRoot) {
+        throw new Error('State trie does not contain state root')
+      }
     }
 
     this._trie.root = stateRoot
diff --git a/package.json b/package.json
index 8fa80c9830..1e353c9075 100644
--- a/package.json
+++ b/package.json
@@ -57,7 +57,7 @@
     "downloadsolc_assets": "wget --no-check-certificate https://binaries.soliditylang.org/wasm/soljson-v0.8.7+commit.e28d00a7.js -O ./apps/remix-ide/src/assets/js/soljson.js && wget --no-check-certificate https://binaries.soliditylang.org/wasm/soljson-v0.8.7+commit.e28d00a7.js -O ./apps/solidity-compiler/src/assets/js/soljson.js",
     "make-mock-compiler": "node apps/remix-ide/ci/makeMockCompiler.js",
     "minify": "uglifyjs --in-source-map inline --source-map-inline -c warnings=false",
-    "build:production": "NODE_ENV=production npx nx build remix-ide --with-deps --skip-nx-cache && npx nx build remix-ide",
+    "build:production": "NODE_ENV=production nx build remix-ide --with-deps --skip-nx-cache && NODE_ENV=production nx build remix-ide",
     "serve:production": "npx http-server ./dist/apps/remix-ide",
     "nightwatch_parallel": "npm run build:e2e && nightwatch --config dist/apps/remix-ide-e2e/nightwatch.js --env=chrome,firefox",
     "nightwatch_local_firefox": "npm run build:e2e && nightwatch --config dist/apps/remix-ide-e2e/nightwatch.js --env=firefox",