(chore): add truffle

blockchain/contracts/Migrations.sol

+pragma solidity >=0.4.21 <0.6.0;
+
+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;
+ }
+
+ function upgrade(address new_address) public restricted {
+ Migrations upgraded = Migrations(new_address);
+ upgraded.setCompleted(last_completed_migration);
+ }
+}

blockchain/migrations/1_initial_migration.js

+const Migrations = artifacts.require("Migrations");
+
+module.exports = function(deployer) {
+ deployer.deploy(Migrations);
+};

blockchain/truffle-config.js

+/**
+ * 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 HDWalletProvider = 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.
+ //
+ // development: {
+ // host: "127.0.0.1", // Localhost (default: none)
+ // port: 8545, // Standard Ethereum port (default: none)
+ // network_id: "*", // Any network (default: none)
+ // },
+
+ // 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"
+ // }
+ }
+ }
+}