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andresbermeoq · Jul 4, 2020 · 4a1bc55 · 4a1bc55
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diff --git a/contracts/Migrations.sol b/contracts/Migrations.sol
@@ -0,0 +1,19 @@
+// SPDX-License-Identifier: MIT
+pragma solidity >=0.4.21 <0.7.0;
+
+contract Migrations {
+    address public owner;
+    uint public last_completed_migration;
+
+    constructor() public {
+        owner = msg.sender;
+    }
+
+    modifier restricted() {
+        if (msg.sender == owner) _;
+    }
+
+    function setCompleted(uint completed) public restricted {
+        last_completed_migration = completed;
+    }
+}
diff --git a/contracts/Votacion.sol b/contracts/Votacion.sol
@@ -0,0 +1,30 @@
+pragma solidity ^0.5.0;
+
+contract Votacion {
+
+  mapping (bytes32 => uint8) public votosRecibidos; //mapping que asocia numero de votos a candidato
+  mapping (bytes32 => bool) public candidatos; //mapping para saber si un candidato es válido
+
+  constructor (bytes32[] memory nombreCandidatos) public { 
+    for(uint i = 0; i < nombreCandidatos.length; i++) {
+      candidatos[nombreCandidatos[i]] = true;
+    }
+  }
+
+  // Numero total de votos recibidos por un candidato
+  function votosTotales(bytes32 candidato) public returns (uint8) {
+    require(candidatoEsValido(candidato));
+    return votosRecibidos[candidato];
+  }
+
+  // Incrementa en 1 el numero de votos de un candidato
+  function votar(bytes32 candidato) public {
+    require(candidatoEsValido(candidato));
+    votosRecibidos[candidato] += 1;
+  }
+
+  // Comprueba que un candidato existe
+  function candidatoEsValido(bytes32 candidato) public returns (bool) {
+    return (candidatos[candidato]);
+  }
+}
diff --git a/index.html b/index.html
@@ -0,0 +1,40 @@
+<!DOCTYPE html>
+<html>
+<head>
+  <title>Aplicacion De Votacion</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>Votacion Ecuador</h1>
+  <div id="address"></div>
+  <div class="table-responsive">
+    <table class="table table-bordered">
+      <thead>
+        <tr>
+          <th>Candidato</th>
+          <th>Votos</th>
+        </tr>
+      </thead>
+      <tbody>
+        <tr>
+          <td>Correa</td>
+          <td id="candidato-1"></td>
+        </tr>
+        <tr>
+          <td>Nebot</td>
+          <td id="candidato-2"></td>
+        </tr>
+      </tbody>
+    </table>
+    <div id="msg"></div>
+  </div>
+  <select id="candidato">
+    <option value="Correa">Correa</option>
+    <option value="Nebot">Nebot</option>
+  </select>
+  <a href="#" onclick="votar()" class="btn btn-primary">Votar</a>
+</body>
+<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
@@ -0,0 +1,57 @@
+// Import the page's CSS. Webpack will know what to do with it.
+
+
+// Import libraries we need.
+import { default as Web3} from 'web3';
+import { default as contract } from 'truffle-contract'
+
+import voting_artifacts from '../../build/contracts/Votacion.json'
+
+var Voting = contract(voting_artifacts);
+
+let candidatos = {"Correa": "candidato-1", "Nebot": "candidato-2"}
+
+// funcion para votar a un candidato que se pasa como parametro. Una vez minada la transaccion se actualiza el contador
+window.votar = function(candidato) {
+  let nombreCandidato = $("#candidato").val();
+  try {
+    $("#msg").html("Tu voto ha sido emitido. El número de votos se actualizará cuando la transacción sea minada. Espera.")
+    $("#candidato").val("");
+
+    Voting.deployed().then(function(contractInstance) {
+      contractInstance.votar(web3.utils.asciiToHex(nombreCandidato), {gas: 140000, from: web3.eth.getAccounts()}).then(function() {
+        let div_id = candidatos[nombreCandidato];
+        return contractInstance.votosTotales.call(web3.utils.asciiToHex(nombreCandidato)).then(function(v) {
+          $("#" + div_id).html(v.toString());
+          $("#msg").html("");
+        });
+      });
+    });
+  } catch (err) {
+    console.log(err);
+  }
+}
+
+// cuando se carga la página se inicializa la conexión con la blockchain y se actualizan los votos de cada candidato
+$( document ).ready(function() {
+  if (typeof web3 !== 'undefined') {
+    console.warn("Usando web3 de fuente externa como Metamask")
+    window.web3 = new Web3(web3.currentProvider);
+  } else {
+    console.warn("No web3 detectado. Redirifiendo a http://localhost:7545.");
+    window.web3 = new Web3(new Web3.providers.HttpProvider("http://localhost:7545"));
+  }
+
+  Voting.setProvider(web3.currentProvider);
+  let nombreCandidatos = Object.keys(candidatos);
+
+  for (var i = 0; i < nombreCandidatos.length; i++) {
+    let nombre = nombreCandidatos[i];
+    Voting.deployed().then(function(contractInstance) {
+      contractInstance.votosTotales.call(web3.utils.asciiToHex(nombre)).then(function(v) {
+
+        $("#" + candidatos[nombre]).html(v.toString());
+      });
+    })
+  }
+});
diff --git a/migrations/1_initial_migration.js b/migrations/1_initial_migration.js
@@ -0,0 +1,5 @@
+const Migrations = artifacts.require("Migrations");
+
+module.exports = function(deployer) {
+  deployer.deploy(Migrations);
+};
diff --git a/migrations/2_deploy_contracts.js b/migrations/2_deploy_contracts.js
@@ -0,0 +1,5 @@
+var Votacion = artifacts.require("./Votacion.sol");
+
+module.exports = function(deployer) {
+  deployer.deploy(Votacion, ['Correa', 'Nebot'].map(x => web3.utils.asciiToHex(x)), {gas: 6700000});
+};
diff --git a/truffle-config.js b/truffle-config.js
@@ -0,0 +1,108 @@
+/**
+ * Use this file to configure your truffle project. It's seeded with some
+ * common settings for different networks and features like migrations,
+ * compilation and testing. Uncomment the ones you need or modify
+ * them to suit your project as necessary.
+ *
+ * More information about configuration can be found at:
+ *
+ * truffleframework.com/docs/advanced/configuration
+ *
+ * To deploy via Infura you'll need a wallet provider (like truffle-hdwallet-provider)
+ * to sign your transactions before they're sent to a remote public node. Infura accounts
+ * are available for free at: infura.io/register.
+ *
+ * You'll also need a mnemonic - the twelve word phrase the wallet uses to generate
+ * public/private key pairs. If you're publishing your code to GitHub make sure you load this
+ * phrase from a file you've .gitignored so it doesn't accidentally become public.
+ *
+ */
+
+// const HDWallet = require('truffle-hdwallet-provider');
+// const infuraKey = "fj4jll3k.....";
+//
+// const fs = require('fs');
+// const mnemonic = fs.readFileSync(".secret").toString().trim();
+
+module.exports = {
+  /**
+   * Networks define how you connect to your ethereum client and let you set the
+   * defaults web3 uses to send transactions. If you don't specify one truffle
+   * will spin up a development blockchain for you on port 9545 when you
+   * run `develop` or `test`. You can ask a truffle command to use a specific
+   * network from the command line, e.g
+   *
+   * $ truffle test --network <network-name>
+   */
+
+  networks: {
+    // Useful for testing. The `development` name is special - truffle uses it by default
+    // if it's defined here and no other network is specified at the command line.
+    // You should run a client (like ganache-cli, geth or parity) in a separate terminal
+    // tab if you use this network and you must also set the `host`, `port` and `network_id`
+    // options below to some value.
+    //
+    ganache: {
+      host: "127.0.0.1",     // Localhost (default: none)
+      port: 7545,            // Standard Ethereum port (default: none)
+      network_id: "5777",       // Any network (default: none)
+    },
+    development: {
+      host: "127.0.0.1",     // Localhost (default: none)
+      port: 7545,            // Standard Ethereum port (default: none)
+      network_id: "*",       // Any network (default: none)
+    },
+
+    // develop: {
+    // port: 8545
+    // },
+
+    // Another network with more advanced options...
+    // advanced: {
+      // port: 8777,             // Custom port
+      // network_id: 1342,       // Custom network
+      // gas: 8500000,           // Gas sent with each transaction (default: ~6700000)
+      // gasPrice: 20000000000,  // 20 gwei (in wei) (default: 100 gwei)
+      // from: <address>,        // Account to send txs from (default: accounts[0])
+      // websockets: true        // Enable EventEmitter interface for web3 (default: false)
+    // },
+
+    // Useful for deploying to a public network.
+    // NB: It's important to wrap the provider as a function.
+    // ropsten: {
+      // provider: () => new HDWalletProvider(mnemonic, `https://ropsten.infura.io/v3/YOUR-PROJECT-ID`),
+      // network_id: 3,       // Ropsten's id
+      // gas: 5500000,        // Ropsten has a lower block limit than mainnet
+      // confirmations: 2,    // # of confs to wait between deployments. (default: 0)
+      // timeoutBlocks: 200,  // # of blocks before a deployment times out  (minimum/default: 50)
+      // skipDryRun: true     // Skip dry run before migrations? (default: false for public nets )
+    // },
+
+    // Useful for private networks
+    // private: {
+      // provider: () => new HDWalletProvider(mnemonic, `https://network.io`),
+      // network_id: 2111,   // This network is yours, in the cloud.
+      // production: true    // Treats this network as if it was a public net. (default: false)
+    // }
+  },
+
+  // Set default mocha options here, use special reporters etc.
+  mocha: {
+    // timeout: 100000
+  },
+
+  // Configure your compilers
+  compilers: {
+    solc: {
+      // version: "0.5.1",    // Fetch exact version from solc-bin (default: truffle's version)
+      // docker: true,        // Use "0.5.1" you've installed locally with docker (default: false)
+      // settings: {          // See the solidity docs for advice about optimization and evmVersion
+      //  optimizer: {
+      //    enabled: false,
+      //    runs: 200
+      //  },
+      //  evmVersion: "byzantium"
+      // }
+    }
+  }
+}