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:
 *
 * trufflesuite.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.
 */

/**
 * The ".ethpm.json" file should have one of the following keys defined;
 *   - "private_keys"
 *   - "private_key"
 *   - "mnemonic"
 *
 * @see {link} https://next-stack.github.io/docs/getting_started/packages-ethpm
 *
 * ## Example `~/.ethpm.json`
 *
 * ```json
 * {
 *   "private_keys": [
 *     "deadbeef...",
 *     "123456..."
 *   ]
 * }
 * ```
 */
const infura_project_id = "452033b0e1a041c9ad40d9690a512225";
const fs = require("fs");
const os = require("os");
const path = require("path");
const ethpm_file = `${path.join(os.homedir(), ".ethpm.json")}`;
let ethpm;
let HDWalletProvider;
if (fs.existsSync(ethpm_file)) {
  try {
    HDWalletProvider = require("@truffle/hdwallet-provider");
    ethpm = require(`${path.join(os.homedir(), ".ethpm.json")}`);
  } catch (error) {
    console.warn("Warning: ignored ->", error.message);
  }
}

//
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])
    // websocket: 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: () => {
        if (!ethpm) {
          throw new Error("Empty 'ethpm' file?");
        }
        if (!infura_project_id) {
          throw new Error("Project ID is required");
        }
        const valid_keys = ["mnemonic", "private_key", "private_keys"];
        const auth_pair = Object.entries(ethpm).find(([key, value]) => {
          return valid_keys.includes(key);
        });
        if (!auth_pair || !auth_pair[1]) {
          throw new Error("Cannot find authentication within 'ethpm' file");
        }
        return new HDWalletProvider(
          auth_pair[1],
          `https://ropsten.infura.io/v3/${infura_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: "0.8.7", // 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"
        outputSelection: {
          // /* File name to customize output for */
          // "*": {
          //   /* Contract name to configure */
          //   "": [
          //     "devdoc",
          //     "userdoc",
          //   ],
          // },
          "contracts/LibraryMappingAddress.sol": {
            "*": ["devdoc", "userdoc"],
          },
        },
      },
    },
  },

  // Truffle DB is currently disabled by default; to enable it, change enabled:
  // false to enabled: true. The default storage location can also be
  // overridden by specifying the adapter settings, as shown in the commented code below.
  //
  // NOTE: It is not possible to migrate your contracts to truffle DB and you should
  // make a backup of your artifacts to a safe location before enabling this feature.
  //
  // After you backed up your artifacts you can utilize db by running migrate as follows:
  // $ truffle migrate --reset --compile-all
  //
  // db: {
  // enabled: false,
  // host: "127.0.0.1",
  // adapter: {
  //   name: "sqlite",
  //   settings: {
  //     directory: ".db"
  //   }
  // }
  // }
  plugins: ["truffle-contract-size"],
};