refactor: remove unnecessary level of depth from runInNode

src/app/execution/txRunner.js

@@ -126,22 +126,17 @@ TxRunner.prototype.runInVm = function (from, to, data, value, gasLimit, useCall,
 
 TxRunner.prototype.runInNode = function (from, to, data, value, gasLimit, useCall, callback) {
   const self = this
-  var tx = {
-    from: from,
-    to: to,
-    data: data,
-    value: value
-  }
+  var tx = { from: from, to: to, data: data, value: value }
 
   if (useCall) {
     tx.gas = gasLimit
-    executionContext.web3().eth.call(tx, function (error, result) {
+    return executionContext.web3().eth.call(tx, function (error, result) {
       callback(error, {
         result: result,
         transactionHash: result.transactionHash
       })
     })
-  } else {
+  }
   executionContext.web3().eth.estimateGas(tx, function (err, gasEstimation) {
     if (err) {
       return callback(err, gasEstimation)
@@ -192,7 +187,6 @@ TxRunner.prototype.runInNode = function (from, to, data, value, gasLimit, useCal
       executeTx(tx, null, self._api, callback)
     }
   })
-  }
 }
 
 function tryTillResponse (txhash, done) {