Merge pull request #1 from girishgoudapatil/master

blockchain ack api

.gitignore

@@ -1 +1 @@
-*~
+*node_modules

etherium/EInvoiceACK.sol

@@ -27,7 +27,7 @@ contract EInvoiceACK {
             gw_datetime: gw_datetime,
             post_datetime: post_datetime
         });        
-        return tx.origin;
+        return this;
     }
 
     function getAckPayloadHash() returns (string) {

etherium/api/app.js

@@ -0,0 +1,56 @@
+var express = require('express');
+var path = require('path');
+
+var logger = require('morgan');
+var cookieParser = require('cookie-parser');
+var bodyParser = require('body-parser');
+
+var acks = require('./routes/ack');
+
+var app = express();
+
+// view engine setup
+app.set('views', path.join(__dirname, 'views'));
+app.set('view engine', 'jade');
+
+app.use(logger('dev'));
+app.use(bodyParser.json());
+app.use(bodyParser.urlencoded({ extended: false }));
+app.use(cookieParser());
+app.use(express.static(path.join(__dirname, 'public')));
+
+app.use('/api/ack', acks);
+
+// catch 404 and forward to error handler
+app.use(function(req, res, next) {
+  var err = new Error('Not Found');
+  err.status = 404;
+  next(err);
+});
+
+// error handlers
+
+// development error handler
+// will print stacktrace
+if (app.get('env') === 'development') {
+  app.use(function(err, req, res, next) {
+    res.status(err.status || 500);
+    res.render('error', {
+      message: err.message,
+      error: err
+    });
+  });
+}
+
+// production error handler
+// no stacktraces leaked to user
+app.use(function(err, req, res, next) {
+  res.status(err.status || 500);
+  res.render('error', {
+    message: err.message,
+    error: {}
+  });
+});
+
+
+module.exports = app;

etherium/api/bin/www

@@ -0,0 +1,90 @@
+#!/usr/bin/env node
+
+/**
+ * Module dependencies.
+ */
+
+var app = require('../app');
+var debug = require('debug')('api:server');
+var http = require('http');
+
+/**
+ * Get port from environment and store in Express.
+ */
+
+var port = normalizePort(process.env.PORT || '3000');
+app.set('port', port);
+
+/**
+ * Create HTTP server.
+ */
+
+var server = http.createServer(app);
+
+/**
+ * Listen on provided port, on all network interfaces.
+ */
+
+server.listen(port);
+server.on('error', onError);
+server.on('listening', onListening);
+
+/**
+ * Normalize a port into a number, string, or false.
+ */
+
+function normalizePort(val) {
+  var port = parseInt(val, 10);
+
+  if (isNaN(port)) {
+    // named pipe
+    return val;
+  }
+
+  if (port >= 0) {
+    // port number
+    return port;
+  }
+
+  return false;
+}
+
+/**
+ * Event listener for HTTP server "error" event.
+ */
+
+function onError(error) {
+  if (error.syscall !== 'listen') {
+    throw error;
+  }
+
+  var bind = typeof port === 'string'
+    ? 'Pipe ' + port
+    : 'Port ' + port;
+
+  // handle specific listen errors with friendly messages
+  switch (error.code) {
+    case 'EACCES':
+      console.error(bind + ' requires elevated privileges');
+      process.exit(1);
+      break;
+    case 'EADDRINUSE':
+      console.error(bind + ' is already in use');
+      process.exit(1);
+      break;
+    default:
+      throw error;
+  }
+}
+
+/**
+ * Event listener for HTTP server "listening" event.
+ */
+
+function onListening() {
+  var addr = server.address();
+  var bind = typeof addr === 'string'
+    ? 'pipe ' + addr
+    : 'port ' + addr.port;
+  debug('Listening on ' + bind);
+}

etherium/api/package.json

@@ -0,0 +1,18 @@
+{
+  "name": "api",
+  "version": "0.0.0",
+  "private": true,
+  "scripts": {
+    "start": "node ./bin/www"
+  },
+  "dependencies": {
+    "body-parser": "~1.15.1",
+    "cookie-parser": "~1.4.3",
+    "debug": "~2.2.0",
+    "ethersim": "^0.5.0",
+    "express": "~4.13.4",
+    "jade": "~1.11.0",
+    "morgan": "~1.7.0",
+    "web3": "^0.16.0"
+  }
+}

etherium/api/public/stylesheets/style.css

@@ -0,0 +1,8 @@
+body {
+  padding: 50px;
+  font: 14px "Lucida Grande", Helvetica, Arial, sans-serif;
+}
+
+a {
+  color: #00B7FF;
+}

etherium/api/routes/ack.js

@@ -0,0 +1,106 @@
+var express = require('express');
+var path = require('path');
+var fs = require('fs');
+var router = express.Router();
+
+var EtherSim = require('ethersim');
+var sim = new EtherSim.init();
+
+var Web3 = require('web3');
+var web3 = new Web3();
+web3.setProvider(sim.provider);
+
+var templatePath = path.join(__dirname, '../..', 'EInvoiceACK.sol')
+var contractSource = fs.readFileSync(templatePath, {
+        encoding : 'utf8'
+});
+
+var compiled, code, abi;
+sim.createAccounts(2, function(err) {
+        if (err) {
+                console.log(err);
+                return process.exit(1);
+        }
+        web3.eth.getAccounts(function(err, accounts){
+        		if (!accounts) {
+        			console.log("Please create at least one account to start with");
+        			return process.exit(1);
+        		}
+                web3.eth.defaultAccount  = accounts[0];
+                sim.setBalance(accounts[0], 9999934000500000, function() {})
+                compiled = web3.eth.compile.solidity(contractSource);
+                code = compiled.EInvoiceACK.code;
+                abi = compiled.EInvoiceACK.info.abiDefinition;
+        });
+})
+
+var codes = {
+	1 : 'created',
+	2 : 'received',
+	3 : 'approved',
+	4 : 'disputed',
+	5 : 'cancelled',
+	6 : 'paid'
+};
+
+/* POST ack 
+*
+*   Example Payload
+*   {
+*		payload_hash : "odihodhodh;odhodhohocnkcich",
+*		url : "http://govhack.org",
+*		code : 1,
+*		gw_datetime : 6963963963
+*	}
+*
+*
+*/
+
+router.post('/', function(req, res, next) {
+	var ack = req.body;
+	if (!(ack && ack.payload_hash && ack.url && ack.code && ack.gw_datetime)) {
+		return res.status(422).send(new Error("Missing mandatory body parameters"));
+	}
+	if (!codes[ack.code]) {
+		return res.status(422).send(new Error("Ack status code is not supported"));
+	}
+	web3.eth.contract(abi).new({
+		data: code
+	}, function (err, contract) {
+		if (err) {
+			return res.status(422).send(err);
+		}
+		try{
+			if (contract.transactionHash && contract.address) {
+				var address = contract.address
+				res.send(address);
+			}else if(contract.transactionHash && !contract.address){
+				//no op
+			}
+		}catch(error){
+			res.status(500).send(error);
+		}
+	})
+});
+
+
+router.get('/:address', function (req, res, next) {
+	var address = req.params.address;
+	if (!address) {
+		return res.status(422).send(new Error("Missing address query parameter"));
+	}
+	var contract = web3.eth.contract(abi);
+	var contractInstance = contract.at(address);
+	res.send({
+		payload_hash : contractInstance.getAckPayloadHash(),
+		url : contractInstance.getAckUrl(),
+		code : contractInstance.getAckstatus(),
+		gw_datetime : contractInstance.getAckgw_datetime(),
+		post_datetime : contractInstance.getAckPostDateTime()
+	});
+})
+
+router.get('/codes', function (req, res, next) {
+	res.send(codes)
+});
+module.exports = router;

etherium/api/views/error.jade

@@ -0,0 +1,6 @@
+extends layout
+
+block content
+  h1= message
+  h2= error.status
+  pre #{error.stack}

etherium/api/views/layout.jade

@@ -0,0 +1,7 @@
+doctype html
+html
+  head
+    title= title
+    link(rel='stylesheet', href='/stylesheets/style.css')
+  body
+    block content