abi output formatting

dist/ethereum.js

 require=(function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){
-var findIndex=function(array,callback){for(var end=!1,i=0;i<array.length&&!end;i++)end=callback(array[i]);return end?i-1:-1},padLeft=function(number,n){return new Array(2*n-number.toString().length+1).join("0")+number},setupTypes=function(){var prefixedType=function(prefix){return function(type,value){var padding,expected=prefix;return 0!==type.indexOf(expected)?!1:(padding=parseInt(type.slice(expected.length))/8,padLeft(value,padding))}},namedType=function(name,padding){return function(type,value){return type!==name?!1:padLeft(value,padding)}};return[prefixedType("uint"),prefixedType("int"),namedType("address",20),namedType("bool",1)]},types=setupTypes(),toBytes=function(json,methodName,params){var method,i,found,j,bytes="",index=findIndex(json,function(method){return method.name===methodName});if(-1!==index){for(bytes=bytes+index+"x0",method=json[index],i=0;i<method.inputs.length;i++){for(found=!1,j=0;j<types.length&&!found;j++)found=types[j](method.inputs[i].type,params[i]);found||console.error("unsupported json type: "+method.inputs[i].type),bytes+=found}return bytes}};module.exports={toBytes:toBytes};
+var findIndex=function(array,callback){for(var end=!1,i=0;i<array.length&&!end;i++)end=callback(array[i]);return end?i-1:-1},findMethodIndex=function(json,methodName){return findIndex(json,function(method){return method.name===methodName})},padLeft=function(number,n){return new Array(2*n-number.toString().length+1).join("0")+number},setupInputTypes=function(){var prefixedType=function(prefix){return function(type,value){var padding,expected=prefix;return 0!==type.indexOf(expected)?!1:(padding=parseInt(type.slice(expected.length))/8,padLeft(value,padding))}},namedType=function(name,padding,formatter){return function(type,value){return type!==name?!1:padLeft(formatter?value:formatter(value),padding)}},formatBool=function(value){return value?"1":"0"};return[prefixedType("uint"),prefixedType("int"),namedType("address",20),namedType("bool",1,formatBool)]},inputTypes=setupInputTypes(),toAbiInput=function(json,methodName,params){var method,i,found,j,bytes="",index=findMethodIndex(json,methodName);if(-1!==index){for(bytes=bytes+index+"x0",method=json[index],i=0;i<method.inputs.length;i++){for(found=!1,j=0;j<inputTypes.length&&!found;j++)found=inputTypes[j](method.inputs[i].type,params[i]);found||console.error("unsupported json type: "+method.inputs[i].type),bytes+=found}return bytes}},setupOutputTypes=function(){var prefixedType=function(prefix){return function(type){var padding,expected=prefix;return 0!==type.indexOf(expected)?-1:(padding=parseInt(type.slice(expected.length))/8,2*padding)}},namedType=function(name,padding){return function(type){return name===type?2*padding:-1}},formatInt=function(value){return parseInt(value,16)},formatBool=function(value){return"1"===value?!0:!1};return[{padding:prefixedType("uint"),format:formatInt},{padding:prefixedType("int"),format:formatInt},{padding:namedType("address",20)},{padding:namedType("bool",1),format:formatBool}]},outputTypes=setupOutputTypes(),fromAbiOutput=function(json,methodName,output){var result,method,i,padding,j,res,formatter,index=findMethodIndex(json,methodName);if(-1!==index){for(output=output.slice(2),result=[],method=json[index],i=0;i<method.outputs.length;i++){for(padding=-1,j=0;j<outputTypes.length&&-1===padding;j++)padding=outputTypes[j].padding(method.outputs[i].type);-1!==padding&&(res=output.slice(0,padding),formatter=outputTypes[j-1].format,result.push(formatter?formatter(res):res),output=output.slice(padding))}return result}};module.exports={toAbiInput:toAbiInput,fromAbiOutput:fromAbiOutput};
 },{}],2:[function(require,module,exports){
 var AutoProvider=function(userOptions){var options,self,closeWithSuccess,ws;if(!web3.haveProvider()){if(this.sendQueue=[],this.onmessageQueue=[],navigator.qt)return void(this.provider=new web3.providers.QtProvider);userOptions=userOptions||{},options={httprpc:userOptions.httprpc||"http://localhost:8080",websockets:userOptions.websockets||"ws://localhost:40404/eth"},self=this,closeWithSuccess=function(success){ws.close(),success?self.provider=new web3.providers.WebSocketProvider(options.websockets):(self.provider=new web3.providers.HttpRpcProvider(options.httprpc),self.poll=self.provider.poll.bind(self.provider)),self.sendQueue.forEach(function(payload){self.provider(payload)}),self.onmessageQueue.forEach(function(handler){self.provider.onmessage=handler})},ws=new WebSocket(options.websockets),ws.onopen=function(){closeWithSuccess(!0)},ws.onerror=function(){closeWithSuccess(!1)}}};AutoProvider.prototype.send=function(payload){return this.provider?void this.provider.send(payload):void this.sendQueue.push(payload)},Object.defineProperty(AutoProvider.prototype,"onmessage",{set:function(handler){return this.provider?void(this.provider.onmessage=handler):void this.onmessageQueue.push(handler)}}),module.exports=AutoProvider;
 },{}],3:[function(require,module,exports){

example/index.html

@@ -6,39 +6,32 @@
 <script type="text/javascript" src="../dist/ethereum.js"></script>
 
 <script type="text/javascript">
-if (window.Promise === undefined) {
-    window.Promise = ES6Promise.Promise;
-}
-
-var web3 = require('web3');
-
-//web3.setProvider(new web3.providers.QtProvider());
-//web3.setProvider(new web3.providers.HttpRpcProvider("http://localhost:8080"));
-// web3.setProvider(new web3.providers.WebSocketProvider("ws://localhost:40404/eth"));
-web3.setProvider(new web3.providers.AutoProvider());
-
-function testSnippet() {
-    web3.eth.watch({altered: web3.eth.coinbase}).changed(function() {
-        web3.eth.balanceAt(web3.eth.coinbase).then(function (balance) {
-        	console.log(parseInt(balance,16));
-        	console.log(typeof balance);
-            document.getElementById("result").innerText = +balance;
+    if (window.Promise === undefined) {
+        window.Promise = ES6Promise.Promise;
+    }
+
+    var web3 = require('web3');
+    web3.setProvider(new web3.providers.AutoProvider());
+
+    function testSnippet() {
+        web3.eth.watch({altered: web3.eth.coinbase}).changed(function() {
+            web3.eth.balanceAt(web3.eth.coinbase).then(function (balance) {
+                console.log(parseInt(balance,16));
+                console.log(typeof balance);
+                document.getElementById("result").innerText = +balance;
+            });
         });
-    });
-}
-
-</script>
+    }
+    </script>
 </head>
 
 <body>
-
-<h1>std::name_reg</h1>
-<input type="text" id="name"></input>
-<button type="button" onClick="testSnippet();">test snippet</button>
-
-<div></div>
-result: <div id="result"></div>
-
+    <h1>std::name_reg</h1>
+    <input type="text" id="name"></input>
+    <button type="button" onClick="testSnippet();">test snippet</button>
+    <div></div>
+    result: 
+    <div id="result"></div>
 </body>
-
 </html>
+

lib/abi.js

@@ -8,11 +8,17 @@ var findIndex = function (array, callback) {
     return end ? i - 1 : -1;
 };
 
+var findMethodIndex = function (json, methodName) {
+    return findIndex(json, function (method) {
+        return method.name === methodName;
+    });
+};
+
 var padLeft = function (number, n) {
     return (new Array(n * 2 - number.toString().length + 1)).join("0") + number;
 };
 
-var setupTypes = function () {
+var setupInputTypes = function () {
     var prefixedType = function (prefix) {
         return function (type, value) {
             var expected = prefix;
@@ -25,32 +31,34 @@ var setupTypes = function () {
         };
     };
 
-    var namedType = function (name, padding) {
+    var namedType = function (name, padding, formatter) {
         return function (type, value) {
             if (type !== name) {
                 return false; 
             }
 
-            return padLeft(value, padding);
+            return padLeft(formatter ? value : formatter(value), padding);
         };
     };
 
+    var formatBool = function (value) {
+        return value ? '1' : '0';
+    };
+
     return [
         prefixedType('uint'),
         prefixedType('int'),
         namedType('address', 20),
-        namedType('bool', 1),
+        namedType('bool', 1, formatBool),
     ];
 };
 
-var types = setupTypes();
+var inputTypes = setupInputTypes();
 
-var toBytes = function (json, methodName, params) {
+var toAbiInput = function (json, methodName, params) {
     var bytes = "";
-    var index = findIndex(json, function (method) {
-        return method.name === methodName;
-    });
-
+    var index = findMethodIndex(json, methodName);
+    
     if (index === -1) {
         return;
     }
@@ -62,8 +70,8 @@ var toBytes = function (json, methodName, params) {
     
     for (var i = 0; i < method.inputs.length; i++) {
         var found = false;
-        for (var j = 0; j < types.length && !found; j++) {
-            found = types[j](method.inputs[i].type, params[i]);
+        for (var j = 0; j < inputTypes.length && !found; j++) {
+            found = inputTypes[j](method.inputs[i].type, params[i]);
         }
         if (!found) {
             console.error('unsupported json type: ' + method.inputs[i].type);
@@ -73,7 +81,75 @@ var toBytes = function (json, methodName, params) {
     return bytes;
 };
 
+var setupOutputTypes = function () {
+    var prefixedType = function (prefix) {
+        return function (type) {
+            var expected = prefix;
+            if (type.indexOf(expected) !== 0) {
+                return -1;
+            }
+            
+            var padding = parseInt(type.slice(expected.length)) / 8;
+            return padding * 2;
+        };
+    };
+
+    var namedType = function (name, padding) {
+        return function (type) {
+            return name === type ? padding * 2: -1;
+        };
+    };
+
+    var formatInt = function (value) {
+        return parseInt(value, 16);
+    };
+
+    var formatBool = function (value) {
+        return value === '1' ? true : false;
+    };
+
+    return [
+    { padding: prefixedType('uint'), format: formatInt },
+    { padding: prefixedType('int'), format: formatInt },
+    { padding: namedType('address', 20) },
+    { padding: namedType('bool', 1), format: formatBool }
+    ];
+};
+
+var outputTypes = setupOutputTypes();
+
+var fromAbiOutput = function (json, methodName, output) {
+    var index = findMethodIndex(json, methodName);
+
+    if (index === -1) {
+        return;
+    }
+    
+    output = output.slice(2);
+
+    var result = [];
+    var method = json[index];
+    for (var i = 0; i < method.outputs.length; i++) {
+        var padding = -1;
+        for (var j = 0; j < outputTypes.length && padding === -1; j++) {
+            padding = outputTypes[j].padding(method.outputs[i].type);
+        }
+
+        if (padding === -1) {
+            // not found output parsing
+            continue;
+        }
+        var res = output.slice(0, padding);
+        var formatter = outputTypes[j - 1].format;
+        result.push(formatter ? formatter(res): res);
+        output = output.slice(padding);
+    }
+
+    return result;
+};
+
 module.exports = {
-    toBytes: toBytes
+    toAbiInput: toAbiInput,
+    fromAbiOutput: fromAbiOutput
 };