project

Author: mgrabina

.gitignore

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+.DS_Store
+node_modules

compile.js

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+const path = require("path");
+const fs = require("fs");
+const solc = require("solc");
+
+const lotteryPath = path.resolve(__dirname, "contracts", "Lottery.sol");
+const source = fs.readFileSync(lotteryPath, "utf8");
+
+module.exports = solc.compile(source, 1).contracts[":Lottery"];

contracts/Lottery.sol

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+pragma solidity ^0.4.17;
+
+contract Lottery {
+    address public manager;
+    address[] public players;
+
+    function Lottery() public {
+        manager = msg.sender;
+    }
+    
+
+    function enter() public payable {
+        require(msg.value > 200000000, "Minimum ether required");
+        players.push(msg.sender);
+    }
+    
+    function random() private view returns (uint) {
+        return uint(keccak256(block.difficulty, now, players));
+    }
+    
+    function pickWinner() public restricted {
+        uint index = random() % players.length;
+        players[index].transfer(this.balance);
+        players = new address[](0);
+    }
+    
+    modifier restricted() {
+        require(msg.sender == manager, "Only for managers");
+        _;
+    }
+    
+    function getPlayers() public view returns (address[]) {
+        return players;
+    }
+}   

deploy.js

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+const HDWalletProvider = require("truffle-hdwallet-provider");
+const Web3 = require("web3");
+const { interface, bytecode } = require("./compile");
+
+const provider = new HDWalletProvider(
+  "couch buddy mixed betray there erosion zebra jungle battle man payment unaware loan evoke crush velvet random wealth stone shrimp banner jungle maple fade",
+  "https://ropsten.infura.io/v3/640fe7e8258f438abe306c1421b8412e"
+);
+const web3 = new Web3(provider);
+
+const deploy = async () => {
+  const accounts = await web3.eth.getAccounts();
+
+  console.log("Attempting to deploy from account", accounts[0]);
+
+  const result = await new web3.eth.Contract(JSON.parse(interface))
+    .deploy({ data: bytecode })
+    .send({ gas: "1000000", gasPrice: '5000000000', from: accounts[0] });
+
+  console.log("Contract deployed to", result.options.address);
+};
+deploy();

interact.js

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+const HDWalletProvider = require('truffle-hdwallet-provider');
+const Web3 = require('web3');
+const { interface, bytecode } = require('./compile');
+
+const provider = new HDWalletProvider(
+    'couch buddy mixed betray there erosion zebra jungle battle man payment unaware loan evoke crush velvet random wealth stone shrimp banner jungle maple fade', 
+    'https://ropsten.infura.io/v3/640fe7e8258f438abe306c1421b8412e',
+    1
+);
+const web3 = new Web3(provider);
+
+const deploy = async() => {
+    const accounts = await web3.eth.getAccounts();
+    console.log(accounts)
+    const contract = await new web3.eth.Contract(JSON.parse(interface), 
+                                                "0xBD43Af44158a9CE58D8B8beb082d8bb2B6261dE0"); 
+    const manager = await contract.methods.manager().call();
+    
+    console.log('Contract manager', manager);
+
+    await contract.methods.enter().send({value: 200000001, gas: "1000000", gasPrice: '5000000000', from: accounts[0]});
+
+};
+
+deploy();

manager.js

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+const HDWalletProvider = require('truffle-hdwallet-provider');
+const Web3 = require('web3');
+const { interface, bytecode } = require('./compile');
+
+const provider = new HDWalletProvider(
+    'couch buddy mixed betray there erosion zebra jungle battle man payment unaware loan evoke crush velvet random wealth stone shrimp banner jungle maple fade', 
+    'https://ropsten.infura.io/v3/640fe7e8258f438abe306c1421b8412e',
+    0
+);
+const web3 = new Web3(provider);
+
+const deploy = async() => {
+    const accounts = await web3.eth.getAccounts();
+    console.log(accounts)
+    const contract = await new web3.eth.Contract(JSON.parse(interface), 
+                                                "0xBD43Af44158a9CE58D8B8beb082d8bb2B6261dE0"); 
+    const manager = await contract.methods.manager().call();
+    
+    console.log('Im the manager', manager == accounts[0]);
+
+    const players = await contract.methods.getPlayers().call();
+
+    console.log(players);
+
+    if (players.length > 0) {
+        const resp =     await contract.methods.pickWinner().send({gas: "1000000", gasPrice: '5000000000', from: accounts[0]});
+        console.log(resp); 
+    }
+
+};
+
+deploy();