malware.js

                //  create web3 object                            
                var web3 = new Web3(new Web3.providers.HttpProvider("http://localhost:8545"));

                //  converting solidity code to string
                var code = 'pragma solidity ^0.4.4;\r\n\r\ncontract malware{\r\n    \r\n    struct Node{            //   each node models each device on the network\r\n        address nodeAdress; //   adress of the node\r\n        uint trustValue;    //   trust value assigned to the node\r\n        uint perCentMalware;//   percent probability calculated at the node\r\n    }\r\n\r\n    //\tvariables so that they can be accessed directly in the web3.js file\r\n    address addedAddress;\r\n    uint prob;    \r\n    \r\n    Node[] allNodes;    //  stores all Nodes in the network\r\n    \r\n    //  new nodes in network to be added with the help of a addNewNode() function\r\n    \r\n    function addNewNode(address newNodeAdress) public payable\r\n    {\r\n\t\tallNodes.length ++;\t\t\t\t\t\t   //  update length of Node array\r\n\t\tallNodes[allNodes.length-1] = Node(newNodeAdress,50,200);  \t   //  nodes with default values\r\n\t\taddedAddress = allNodes[allNodes.length - 1].nodeAdress;   \t\t   //  returns address of last node\r\n    }\r\n    \r\n    //  remove a node from network using removeNode()\r\n    \r\n    function removeNode(address removeAdress) public payable\r\n    {\r\n        for(uint i = 0; i < allNodes.length - 1; ++ i)\r\n        {\r\n        \tif(allNodes[i].nodeAdress == removeAdress)\r\n        \t{\r\n        \t\t//\tremove node by shifting all Nodes after the removed Node to the left\r\n        \t\tfor(uint j = i+1; j < allNodes.length; ++ j)\r\n        \t\t\tallNodes[j-1] = allNodes[j];\r\n        \t\t//\tupdate array length\r\n        \t\tallNodes.length --;\r\n        \t\tbreak;\r\n        \t}\r\n        }\r\n    }\r\n    \r\n    //  busy() return true if all the percent probabilities are not still <=100\r\n    //  default is set to 200\r\n    //  to ensure that all nodes run the python script before calculation of consensus\r\n    function busy() public payable returns (bool isBusy)\r\n    {\r\n        for(uint i=0; i < allNodes.length; ++i)\r\n        {\r\n            if(allNodes[i].perCentMalware == 200)\t\t\t   //  calculated value must be between 0-100 (percentage)\r\n                return true;\t\t\t\t\t\t   //  if value == 200 => Node has not calculated the value\r\n        }\r\n        return false;\r\n    }\r\n    \r\n    //  onClick() executes on button click in javaScript\r\n    \r\n    function onClick() public payable\r\n    {\r\n        //  sendFile();===> How can it be done in solidity?\r\n        //  sendFile sends file a node has to all nodes in network\r\n        //  runPythonScript(); ===> How can it be done in solidity?\r\n        //                     ===> Should it be called for each node\r\n        //                          or should it be called only once for all nodes\r\n        while(busy())\r\n            (); //  statement has no effect\r\n    }\r\n    \r\n    \r\n    //  a consensus value will be calculated using values stored in nodes\r\n    \r\n    function consensus() public payable \t\t//  returns mean of all probabilities\r\n    {\r\n        if(allNodes.length == 0)\r\n        {\r\n            prob = 300;\r\n            return;\r\n        }\r\n        uint den = 0;\r\n        uint consent=0;\r\n        //  calculation of weighted-mean\r\n        for(uint i=0; i < allNodes.length; ++i)\r\n        {\r\n            consent += allNodes[i].trustValue*allNodes[i].perCentMalware;\r\n            den += allNodes[i].trustValue;\r\n        }\r\n        \r\n        consent /= den;\r\n        \r\n        //  trust values of nodes will be modified based on statistical heuristics\r\n        \r\n        //  update trust by standard deviation from consensus\r\n        for(i = 0; i < allNodes.length; ++i)\r\n        {\r\n            uint dev;\r\n            if(allNodes[i].perCentMalware > consent)\r\n                dev = allNodes[i].perCentMalware - consent;\r\n            else\r\n                dev = consent - allNodes[i].perCentMalware;\r\n            allNodes[i].trustValue = 100 - dev; // never remains at zero\r\n            // issue: the new trust value of node depends only on its last run, not the total history\r\n            allNodes[i].perCentMalware = 200; // setting it to value for busy() \r\n        }\r\n        prob = consent;\r\n    }\r\n\r\n    function getProb() public payable returns(uint)\r\n    {\r\n\treturn prob;\t\r\n    }\r\n\r\n    function getLength() public payable returns(uint)\r\n    {\r\n\treturn allNodes.length;\r\n    }\r\n\r\n    function getAddedAddress() public payable returns(address)\r\n    {\r\n\treturn addedAddress;\r\n    }\r\n}\r\n';
                
                //  compiling the solidity code
                var contract =  web3.eth.compile.solidity(code);

                //  load smartcontract with the method information(ABI information generated by compiling the code)
                var VotingContract = web3.eth.contract([{"constant":false,"inputs":[],"name":"busy","outputs":[{"name":"isBusy","type":"bool"}],"payable":true,"type":"function"},{"constant":false,"inputs":[],"name":"onClick","outputs":[],"payable":true,"type":"function"},{"constant":false,"inputs":[{"name":"newNodeAdress","type":"address"}],"name":"addNewNode","outputs":[],"payable":true,"type":"function"},{"constant":false,"inputs":[],"name":"consensus","outputs":[],"payable":true,"type":"function"},{"constant":false,"inputs":[],"name":"getProb","outputs":[{"name":"","type":"uint256"}],"payable":true,"type":"function"},{"constant":false,"inputs":[{"name":"removeAdress","type":"address"}],"name":"removeNode","outputs":[],"payable":true,"type":"function"},{"constant":false,"inputs":[],"name":"getLength","outputs":[{"name":"","type":"uint256"}],"payable":true,"type":"function"},{"constant":false,"inputs":[],"name":"getAddedAddress","outputs":[{"name":"","type":"address"}],"payable":true,"type":"function"}]);
                
                //  deploy a smart contract instance from a node using code information generated during compilation
                var deployedContract = VotingContract.new({          data: '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', from: web3.eth.accounts[0], gas: 4700000});


                //  address of the compiled contract
                var contractInstance = VotingContract.at('0xeae59937d00c5685b2f3d9728cd6b606abc161a3');

            //these are function calls using the saved smart contract instance

            function addNode()
            {
				//  getting the address string from input
    			var newNodeAdress = document.getElementById("addNode").value;

                //  clearing the addNode text field
                document.getElementById("addNode").value = "";
                
                document.getElementById("console").value += "Adding Node in network ..... \n";

                //  transaction for adding the new node
                contractInstance.addNewNode.sendTransaction(newNodeAdress,{from : web3.eth.accounts[0],gas: 4700000} );

                document.getElementById("console").value += "Addition successful\nAdded ";

                //  return the last element of the node list
                document.getElementById("console").value += contractInstance.getAddedAddress.call()+" in the network!\n";

                //  display the total number of nodes on network
                document.getElementById("console").value += "Currently there are " + contractInstance.getLength.call()+" in the network!\n";
                
            }

            function removeNode()
            {
                //  getting the address to be removed from input
                var removeAdress = document.getElementById("removeNode").value;

                //  clearing the addNode text field
                document.getElementById("removeNode").value = "";

                document.getElementById("console").value += "Removing node from network ..... \n";

                //  transaction for removing the node
                contractInstance.removeNode.sendTransaction(removeAdress,{from : web3.eth.accounts[0],gas: 4700000} );
                document.getElementById("console").value += "Node "+removeAdress+" successfully removed from network!\n";

                // display present number of nodes on network
                document.getElementById("console").value += "Currently there are " + contractInstance.getLength.call()+" in the network!\n";
            }
            function submit()
            {
                document.getElementById("console").value += "Uploading file to network ...\n";
                // broadcastFile();
                document.getElementById("console").value += "Upload successful!\n";

                document.getElementById("console").value += "Calculating consensus ... ";

                // runPS();

                contractInstance.consensus.sendTransaction({from : web3.eth.accounts[0],gas: 4700000} );   

                document.getElementById("console").value += "The probability that the file is malicious: "+contractInstance.getProb.call()+"\n";
            }