suggested changes and more ethereumjs-vm related update

remix-lib/src/code/opcodes.js

@@ -2,7 +2,7 @@
 var codes = {
   // 0x0 range - arithmetic ops
   // name, baseCost, off stack, on stack, dynamic, async
-  // @todo can be improved while refactoring
+  // @todo can be improved on basis of this: https://github.com/ethereumjs/ethereumjs-vm/blob/master/lib/evm/opcodes.ts
 
   0x00: ['STOP', 0, 0, 0, false],
   0x01: ['ADD', 3, 2, 1, false],

remix-lib/src/execution/txListener.js

@@ -40,14 +40,13 @@ class TxListener {
       // in web3 mode && listen remix txs only
       if (!this._isListening) return // we don't listen
       if (this._loopId && executionContext.getProvider() !== 'vm') return // we seems to already listen on a "web3" network
-
       var call = {
         from: from,
         to: to,
         input: data,
         hash: txResult.transactionHash ? txResult.transactionHash : 'call' + (from || '') + to + data,
         isCall: true,
-        returnValue: executionContext.isVM() ? txResult.result.vm.return : ethJSUtil.toBuffer(txResult.result),
+        returnValue: executionContext.isVM() ? txResult.result.execResult.returnValue : ethJSUtil.toBuffer(txResult.result),
         envMode: executionContext.getProvider()
       }
 
@@ -80,9 +79,9 @@ class TxListener {
 
     function addExecutionCosts (txResult, tx) {
       if (txResult && txResult.result) {
-        if (txResult.result.vm) {
+        if (txResult.result.execResult) {
-          tx.returnValue = txResult.result.vm.return
+          tx.returnValue = txResult.result.execResult.returnValue
-          if (txResult.result.vm.gasUsed) tx.executionCost = txResult.result.vm.gasUsed.toString(10)
+          if (txResult.result.execResult.gasUsed) tx.executionCost = txResult.result.execResult.gasUsed.toString(10)
         }
         if (txResult.result.gasUsed) tx.transactionCost = txResult.result.gasUsed.toString(10)
       }

remix-lib/src/helpers/txResultHelper.js

@@ -21,14 +21,14 @@ function convertToPrefixedHex (input) {
 */
 function resultToRemixTx (txResult) {
   const { result, transactionHash } = txResult
-  const { status, vm, gasUsed, createdAddress, contractAddress } = result
+  const { status, execResult, gasUsed, createdAddress, contractAddress } = result
   let returnValue, errorMessage
 
   if (isHexString(result)) {
     returnValue = result
-  } else if (vm !== undefined) {
+  } else if (execResult !== undefined) {
-    returnValue = vm.return
+    returnValue = execResult.return
-    errorMessage = vm.exceptionError
+    errorMessage = execResult.exceptionError
   }
 
   return {

remix-simulator/src/methods/txProcess.js

@@ -8,11 +8,8 @@ function runCall (payload, from, to, data, value, gasLimit, txRunner, callbacks,
     if (err) {
       return callback(err)
     }
-
+    const returnValue = result.result.execResult.returnValue.toString('hex')
-    let toReturn = '0x' + result.result.execResult.returnValue.toString('hex')
+    const toReturn = `0x${returnValue || '0'}`
-    if (toReturn === '0x') {
-      toReturn = '0x0'
-    }
     return callback(null, toReturn)
   }