Make getValue/getGasLimit/getAddress async

src/app/renderer.js

@@ -113,14 +113,22 @@ Renderer.prototype.contracts = function (data, source) {
     return source.sources[currentFile]
   }
 
-  var getAddress = function () { return $('#txorigin').val() }
+  var getAddress = function (cb) {
+    cb(null, $('#txorigin').val())
+  }
 
-  var getValue = function () {
+  var getValue = function (cb) {
+    try {
       var comp = $('#value').val().split(' ')
-    return self.executionContext.web3().toWei(comp[0], comp.slice(1).join(' '))
+      cb(null, self.executionContext.web3().toWei(comp[0], comp.slice(1).join(' ')))
+    } catch (e) {
+      cb(e)
+    }
   }
 
-  var getGasLimit = function () { return $('#gasLimit').val() }
+  var getGasLimit = function (cb) {
+    cb(null, $('#gasLimit').val())
+  }
 
   this.udapp.reset(udappContracts, getAddress, getValue, getGasLimit, renderOutputModifier)
 

src/universal-dapp.js

@@ -690,14 +690,15 @@ UniversalDApp.prototype.runTx = function (args, cb) {
     function (callback) {
       tx.gasLimit = 3000000
 
-      // NOTE: getGasLimit should be async
       if (self.getGasLimit) {
-        try {
-          tx.gasLimit = self.getGasLimit()
-          callback()
-        } catch (e) {
-          callback(e)
+        self.getGasLimit(function (err, ret) {
+          if (err) {
+            return callback(err)
           }
+
+          tx.gasLimit = ret
+          callback()
+        })
       } else {
         callback()
       }
@@ -706,24 +707,30 @@ UniversalDApp.prototype.runTx = function (args, cb) {
     function (callback) {
       tx.value = 0
 
-      // NOTE: getValue should be async
       if (self.getValue) {
-        try {
-          tx.value = self.getValue()
-          callback()
-        } catch (e) {
-          callback(e)
+        self.getValue(function (err, ret) {
+          if (err) {
+            return callback(err)
           }
+
+          tx.value = ret
+          callback()
+        })
       } else {
         callback()
       }
     },
     // query address
     function (callback) {
-      // NOTE: getAddress should be async
       if (self.getAddress) {
-        tx.from = self.getAddress()
+        self.getAddress(function (err, ret) {
+          if (err) {
+            return callback(err)
+          }
+
+          tx.from = ret
           callback()
+        })
       } else {
         self.getAccounts(function (err, ret) {
           if (err) {