fixed batch requests, error reporting and made batch requests for async properties working

lib/web3/batch.js

@@ -21,6 +21,8 @@
  */
 
 var RequestManager = require('./requestmanager');
+var Jsonrpc = require('./jsonrpc');
+var errors = require('./errors');
 
 var Batch = function () {
     this.requests = [];
@@ -47,11 +49,14 @@ Batch.prototype.execute = function () {
         results = results || [];
         requests.map(function (request, index) {
             return results[index] || {};
-        }).map(function (result, index) {
-            return requests[index].format ? requests[index].format(result.result) : result.result;
         }).forEach(function (result, index) {
             if (requests[index].callback) {
-                requests[index].callback(err, result);
+
+                if (!Jsonrpc.getInstance().isValidResponse(result)) {
+                    requests[index].callback(errors.InvalidResponse(result));
+                }
+
+                requests[index].callback(null, (requests[index].format ? requests[index].format(result.result) : result.result));
             }
         });
     }); 

lib/web3/property.js

@@ -22,6 +22,7 @@
  */
 
 var RequestManager = require('./requestmanager');
+var utils = require('../utils/utils');
 
 var Property = function (options) {
     this.name = options.name;
@@ -53,6 +54,19 @@ Property.prototype.formatOutput = function (result) {
     return this.outputFormatter && result !== null ? this.outputFormatter(result) : result;
 };
 
+/**
+ * Should be used to extract callback from array of arguments. Modifies input param
+ *
+ * @method extractCallback
+ * @param {Array} arguments
+ * @return {Function|Null} callback, if exists
+ */
+Property.prototype.extractCallback = function (args) {
+    if (utils.isFunction(args[args.length - 1])) {
+        return args.pop(); // modify the args array!
+    }
+};
+
 /**
  * Should attach function to method
  * 
@@ -79,7 +93,10 @@ Property.prototype.attachToObject = function (obj) {
         return prefix + name.charAt(0).toUpperCase() + name.slice(1);
     };
 
-    obj[toAsyncName('get', name)] = this.getAsync.bind(this);
+    var func = this.getAsync.bind(this);
+    func.request = this.request.bind(this);
+
+    obj[toAsyncName('get', name)] = func;
 };
 
 /**
@@ -112,5 +129,22 @@ Property.prototype.getAsync = function (callback) {
     });
 };
 
+/**
+ * Should be called to create pure JSONRPC request which can be used in batch request
+ *
+ * @method request
+ * @param {...} params
+ * @return {Object} jsonrpc request
+ */
+Property.prototype.request = function () {
+    var payload = {
+        method: this.getter,
+        params: [],
+        callback: this.extractCallback(Array.prototype.slice.call(arguments))
+    };
+    payload.format = this.formatOutput.bind(this);
+    return payload;
+};
+
 module.exports = Property;