From 43fed4f3e509ec59bcf1a01ed7313a4a631c3ed3 Mon Sep 17 00:00:00 2001
From: Andre Medeiros <me@andremedeiros.info>
Date: Tue, 22 Jan 2019 09:57:08 -0500
Subject: [PATCH] fix(@embark/cockpit): fix gas estimation

---
 src/lib/modules/profiler/gasEstimator.js | 111 ++++++++++++-----------
 1 file changed, 56 insertions(+), 55 deletions(-)

diff --git a/src/lib/modules/profiler/gasEstimator.js b/src/lib/modules/profiler/gasEstimator.js
index 73a589a72..58ff0b8c0 100644
--- a/src/lib/modules/profiler/gasEstimator.js
+++ b/src/lib/modules/profiler/gasEstimator.js
@@ -1,4 +1,3 @@
-/*global web3*/
 const async = require('async');
 const ContractFuzzer = require('./fuzzer.js');
 
@@ -13,63 +12,65 @@ class GasEstimator {
   estimateGas(contractName, cb) {
     const self = this;
     let gasMap = {};
-    self.events.request('contracts:contract', contractName, (contract) => {
-      let fuzzMap = self.fuzzer.generateFuzz(3, contract);
-      let contractObj = new web3.eth.Contract(contract.abiDefinition, contract.deployedAddress);
-      async.each(contract.abiDefinition.filter((x) => x.type !== "event"), 
-        (abiMethod, gasCb) => {
-          let name = abiMethod.name;
-          if (abiMethod.type === "constructor") {
-            // already provided for us
-            gasMap['constructor'] = contract.gasEstimates.creation.totalCost.toString();
-            return gasCb(null, name, abiMethod.type);
-          } else if (abiMethod.type === "fallback") {
-            gasMap['fallback'] = contract.gasEstimates.external[""].toString();
-            return gasCb(null, name, abiMethod.type);
-          } else if (
-            (abiMethod.inputs === null || abiMethod.inputs === undefined || abiMethod.inputs.length === 0)
-          ) {
-            // just run it and register it
-            contractObj.methods[name]
-            .apply(contractObj.methods[name], [])
-            .estimateGas((err, gasAmount) => {
-              if (err) {
-                self.logger.error(`Error getting gas estimate for "${name}"`, err.message || err);
-                return gasCb(null, name, abiMethod.type);
-              }
-              gasMap[name] = gasAmount;
-              return gasCb(null, name, abiMethod.type);              
-            });
-          } else {
-            // async concatenate all the fuzz values and their gas cost outputs and check for equality
-            async.concat(fuzzMap[name], (values, getVarianceCb) => {
-              contractObj.methods[name].apply(contractObj.methods[name], values)
-                .estimateGas((err, gasAmount) => {
-                  if (err) {
-                    self.logger.error(`Error getting gas estimate for "${name}"`, err.message || err);
-                  }
-                  getVarianceCb(null, gasAmount);
-                });
-              }, (err, variance) => {
-                if (variance.every(v => v === variance[0])) {
-                  gasMap[name] = variance[0];
-                } else {
-                  // get average
-                  let sum = variance.reduce(function(memo, num) { return memo + num; });
-                  gasMap[name] = sum / variance.length;
+    self.events.request('blockchain:object', ({ web3 }) => {
+      self.events.request('contracts:contract', contractName, (contract) => {
+        let fuzzMap = self.fuzzer.generateFuzz(3, contract);
+        let contractObj = new web3.eth.Contract(contract.abiDefinition, contract.deployedAddress);
+        async.each(contract.abiDefinition.filter((x) => x.type !== "event"),
+          (abiMethod, gasCb) => {
+            let name = abiMethod.name;
+            if (abiMethod.type === "constructor") {
+              // already provided for us
+              gasMap['constructor'] = contract.gasEstimates.creation.totalCost.toString();
+              return gasCb(null, name, abiMethod.type);
+            } else if (abiMethod.type === "fallback") {
+              gasMap['fallback'] = contract.gasEstimates.external[""].toString();
+              return gasCb(null, name, abiMethod.type);
+            } else if (
+              (abiMethod.inputs === null || abiMethod.inputs === undefined || abiMethod.inputs.length === 0)
+            ) {
+              // just run it and register it
+              contractObj.methods[name]
+              .apply(contractObj.methods[name], [])
+              .estimateGas((err, gasAmount) => {
+                if (err) {
+                  self.logger.error(`Error getting gas estimate for "${name}"`, err.message || err);
+                  return gasCb(null, name, abiMethod.type);
                 }
+                gasMap[name] = gasAmount;
                 return gasCb(null, name, abiMethod.type);
-              });    
+              });
+            } else {
+              // async concatenate all the fuzz values and their gas cost outputs and check for equality
+              async.concat(fuzzMap[name], (values, getVarianceCb) => {
+                contractObj.methods[name].apply(contractObj.methods[name], values)
+                  .estimateGas((err, gasAmount) => {
+                    if (err) {
+                      self.logger.error(`Error getting gas estimate for "${name}"`, err.message || err);
+                    }
+                    getVarianceCb(null, gasAmount);
+                  });
+                }, (err, variance) => {
+                  if (variance.every(v => v === variance[0])) {
+                    gasMap[name] = variance[0];
+                  } else {
+                    // get average
+                    let sum = variance.reduce(function(memo, num) { return memo + num; });
+                    gasMap[name] = sum / variance.length;
+                  }
+                  return gasCb(null, name, abiMethod.type);
+                });
+            }
+          },
+          (err, name, type) => {
+            if (err) {
+              if (type === "constructor" || type === "fallback") name = type;
+              return cb(err, null, name);
+            }
+            cb(null, gasMap, null);
           }
-        },
-        (err, name, type) => {
-          if (err) {
-            if (type === "constructor" || type === "fallback") name = type;
-            return cb(err, null, name);
-          }
-          cb(null, gasMap, null);
-        }
-      );
+        );
+      });
     });
   }
 }