Blockchain

arrayofblocks.js

@@ -0,0 +1,5 @@
+var getGenesisBlock = () => {
+    return new Block(0, "0", 1465154705, "my block!!", "816534932c2b7154836da6afc367695e6337db8a921823784c14378abed4f7d7");
+};
+
+var blockchain = [getGenesisBlock()];

block.js

@@ -0,0 +1,9 @@
+class Block {
+    constructor(index, previousHash, timestamp, data, hash) {
+        this.index = index;
+        this.previousHash = previousHash.toString();
+        this.timestamp = timestamp;
+        this.data = data;
+        this.hash = hash.toString();
+    }
+}

calHash.js

@@ -0,0 +1,3 @@
+var calHash = (index, previousHash, timestamp, data) => {
+    return CryptoJS.SHA256(index + previousHash + timestamp + data).toString();
+};

generateNextblock.js

@@ -0,0 +1,7 @@
+var generateNextBlock = (blockData) => {
+    var previousBlock = getLatestBlock();
+    var nextIndex = previousBlock.index + 1;
+    var nextTimestamp = new Date().getTime() / 1000;
+    var nextHash = calculateHash(nextIndex, previousBlock.hash, nextTimestamp, blockData);
+    return new Block(nextIndex, previousBlock.hash, nextTimestamp, blockData, nextHash);
+};

package.json

@@ -16,3 +16,13 @@
     "lite-server": "^2.3.0"
   }
 }
+"dependencies": {
+    "body-parser": "~1.10.2",
+    "cookie-parser": "~1.3.3",
+    "debug": "~2.1.1",
+    "express": "~4.11.1",
+    "jade": "~1.9.1",
+    "morgan": "~1.5.1",
+    "serve-favicon": "~2.2.0"
+  }
+}

server.js

@@ -0,0 +1,28 @@
+var formidable = require('formidable'),
+ util = require('util'),
+ express = require('express'),
+ fs = require('fs'),
+ app = express();
+ app.use(express.static(__dirname, '/public'));
+ app.post('/upload', function(req, res) {
+    var form = new formidable.IncomingForm();
+    form.parse(req, function(err, fields, files) {
+        // console.log(util.inspect({
+        //     fields: fields,
+        //     files: files
+        // }));
+
+        fs.readFile(files.RemoteFile.path, function(err, data) {
+            // save file from temp dir to new dir
+            var newPath = __dirname + "/uploads/" + files.RemoteFile.name;
+            fs.writeFile(newPath, data, function(err) {
+                if (err) throw err;
+                console.log('file saved');  
+                res.end();
+            });
+        });
+    });
+});
+app.listen(process.env.PORT, process.env.IP, function(){
+   console.log("The Blockchain Server Has Started!");
+});