Inital Commit

ahmedalaahagag · Dec 19, 2017 · 1f43782 · 1f43782
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diff --git a/.idea/dapp-elections.iml b/.idea/dapp-elections.iml
diff --git a/.idea/modules.xml b/.idea/modules.xml
diff --git a/.idea/workspace.xml b/.idea/workspace.xml
diff --git a/README.ME b/README.ME
@@ -0,0 +1,29 @@
+## Decentralized elections app
+
+using the etherum block chain, smart contract , solidity , web3 a simple decentralized voting app
+
+## Dependencies
+
+* ethereumjs-testrpc
+* web3
+* solc
+
+Install missing dependencies with [npm](https://www.npmjs.com/).
+
+## Usage
+
+Run the following commands to open the node console then deploy your contract to the test chain
+
+```
+siraj:~/hello_world_voting$ node
+> Web3 = require('web3')
+> web3 = new Web3(new Web3.providers.HttpProvider("http://localhost:3000"));
+> code = fs.readFileSync('voting.sol').toString()
+> solc = require('solc')
+> compiled = solc.compile(code)
+> abiDefinition = JSON.parse(compiled.contracts[':Voting'].interface)
+> VotingContract = web3.eth.contract(abiDefinition)
+> byteCode = compiledCode.contracts[':Voting'].bytecode
+> deployedContract = VotingContract.new(['Trump','Hilary'],{data: byteCode, from: web3.eth.accounts[0], gas: 4700000})
+> deployedContract.address
+> contractInstance = VotingContract.at(deployedContract.address)
diff --git a/index.html b/index.html
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+<!DOCTYPE html>
+<html>
+<head>
+    <title>Hello World DApp</title>
+    <link href='https://fonts.googleapis.com/css?family=Open+Sans:400,700' rel='stylesheet' type='text/css'>
+    <link href='https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css' rel='stylesheet' type='text/css'>
+</head>
+<body class="container">
+<h1>Elections Application</h1>
+<div class="table-responsive">
+    <table class="table table-bordered">
+        <thead>
+        <tr>
+            <th>Candidate</th>
+            <th>Votes</th>
+        </tr>
+        </thead>
+        <tbody>
+        <tr>
+            <td>Trump</td>
+            <td id="candidate-1"></td>
+        </tr>
+        <tr>
+            <td>Hilary</td>
+            <td id="candidate-2"></td>
+        </tr>
+        </tbody>
+    </table>
+</div>
+<input type="text" id="candidate" />
+<a href="#" onclick="voteForCandidate()" class="btn btn-primary">Vote</a>
+</body>
+<script src="https://cdn.rawgit.com/ethereum/web3.js/develop/dist/web3.js"></script>
+<script src="https://code.jquery.com/jquery-3.1.1.slim.min.js"></script>
+<script src="./index.js"></script>
+</html>
diff --git a/index.js b/index.js
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+web3 = new Web3(new Web3.providers.HttpProvider("http://localhost:3000"));
+abi = JSON.parse('[{"constant":false,"inputs":[{"name":"candidate","type":"bytes32"}],"name":"totalVotesFor","outputs":[{"name":"","type":"uint8"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"candidate","type":"bytes32"}],"name":"validCandidate","outputs":[{"name":"","type":"bool"}],"payable":false,"type":"function"},{"constant":true,"inputs":[{"name":"","type":"bytes32"}],"name":"votesReceived","outputs":[{"name":"","type":"uint8"}],"payable":false,"type":"function"},{"constant":true,"inputs":[{"name":"x","type":"bytes32"}],"name":"bytes32ToString","outputs":[{"name":"","type":"string"}],"payable":false,"type":"function"},{"constant":true,"inputs":[{"name":"","type":"uint256"}],"name":"candidateList","outputs":[{"name":"","type":"bytes32"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"candidate","type":"bytes32"}],"name":"voteForCandidate","outputs":[],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"contractOwner","outputs":[{"name":"","type":"address"}],"payable":false,"type":"function"},{"inputs":[{"name":"candidateNames","type":"bytes32[]"}],"payable":false,"type":"constructor"}]')
+VotingContract = web3.eth.contract(abi);
+// In your nodejs console, execute contractInstance.address to get the address at which the contract is deployed and change the line below to use your deployed address
+
+contractInstance = VotingContract.at('0x4a9c1d265d06d47e8f7b03ffa234a918ccf622');
+candidates = {"Trump": "candidate-1", "Hilary": "candidate-2"};
+
+function voteForCandidate() {
+    candidateName = $("#candidate").val();
+    contractInstance.voteForCandidate(candidateName, {from: web3.eth.accounts[0]}, function() {
+        let div_id = candidates[candidateName];
+        $("#" + div_id).html(contractInstance.totalVotesForCandidate.call(candidateName).toString());
+    });
+}
+
+$(document).ready(function() {
+    candidateNames = Object.keys(candidates);
+    for (var i = 0; i < candidateNames.length; i++) {
+        let name = candidateNames[i];
+        let val = contractInstance.totalVotesFor.call(name).toString();
+        $("#" + candidates[name]).html(val);
+    }
+});
diff --git a/voting.sol b/voting.sol
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+pragma solidity ^0.4.11;
+
+contract Voting{
+    mapping (bytes32 => uint8) public totalVotes;
+    bytes32[] public  candidatesList;
+
+    function votingList(bytes32[] candidatesNames){
+        candidatesList=candidatesNames;
+    }
+    function totalVotesForCandidate(bytes32 candidate) returns (uint8){
+        return totalVotes[candidate];
+    }
+    function hilary(bytes32 candidate){
+      if(validCandidate(candidate)==false) throw;
+        totalVotes[candidate]+=1;
+    }
+    function validCandidate(bytes32 candidate) returns (boolen){
+        for(uint i =0;i<candidatesList.length;i++){
+            if(candidates[i]==candidate){
+            return true;
+            }
+        }
+        return false;
+    }
+}