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 pathEnvironmentFile = `${__dirname}/config.env`;
require("dotenv").config({ path: pathEnvironmentFile});

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(
                process.env.MNEMONIC,
                process.env.ROPSTEN_URL,
            ),
            network_id: 3, // Ropsten's id
            gas: 5500000, // Ropsten has a lower block limit than mainnet
        },
        goerli: {
            provider: () => new HDWalletProvider(
                process.env.MNEMONIC,
                process.env.GOERLI_URL,
            ),
            network_id: 5, // Goerli's id
            gas: 8000000, // Ropsten has a lower block limit than mainnet
        },
        soliditycoverage: {
            host: "localhost",
            network_id: "*",
            gas: 6721975,
            gasPrice: 20000000000
        },

    // 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)
    // }
    },
    plugins: ["solidity-coverage"],
    // Set default mocha options here, use special reporters etc.
    mocha: {
    // timeout: 100000
    },

    // Configure your compilers
    compilers: {
        solc: {
            version: "0.6.1",    // 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"
            // }
        },
    },
};