Add gas estimation for constructor

src/app/editor/contextView.js

@@ -173,7 +173,7 @@ class ContextView {
 
     function showGasEstimation () {
       var estimatedGas = self._api.contextualListener.gasEstimation(node) + ' gas'
-      if (node.name === 'FunctionDefinition'  && !node.attributes.isConstructor) var el = yo`<div class=${css.gasEstimation}> <img class=${css.gasStationIcon} title='Estimated gas price' src='https://png.icons8.com/gas-station/win8/50/000000'> ${estimatedGas}</div>`
+      if (node.name === 'FunctionDefinition') var el = yo`<div class=${css.gasEstimation}> <img class=${css.gasStationIcon} title='Estimated gas price' src='https://png.icons8.com/gas-station/win8/50/000000'> ${estimatedGas}</div>`
       return el
     }
   }

src/app/editor/contextualListener.js

@@ -92,13 +92,17 @@ class ContextualListener {
   }
 
   _getGasEstimation (results) {
+    this.results = results
     this.contractName = Object.keys(results.data.contracts[results.source.target])[0]
     this.target = results.data.contracts[results.source.target]
     this.functions = Object.keys(this.target[this.contractName].evm.gasEstimates.external)
+    this.creationCost = this.target[this.contractName].evm.gasEstimates.creation.totalCost
   }
 
   gasEstimation (node) {
     if (node.name === 'FunctionDefinition') {
+      var estimation
+      if (!node.attributes.isConstructor) {
         var functionName = node.attributes.name
         var fn
         for (var x in this.functions) {
@@ -107,10 +111,13 @@ class ContextualListener {
             break
           }
         }
-      var estimation = this.target[this.contractName].evm.gasEstimates.external[fn]
-      return estimation
+        estimation = this.target[this.contractName].evm.gasEstimates.external[fn]
+      } else {
+        estimation = this.creationCost
       }
     }
+    return estimation
+  }
 
   _highlight (node, compilationResult) {
     if (!node) return