truffle-config.js

let HDWalletProvider = require("truffle-hdwallet-provider");

infuraKey = '798c1e88399a4039a111e31b16db0de9';
mnemonic = 'REPLACE_MNEMONIC_HERE';


module.exports = {

    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)
        },

        // 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/${infuraKey}`),
            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)
        },

        rinkeby: {
            provider: () => new HDWalletProvider(mnemonic, `https://rinkeby.infura.io/v3/${infuraKey}`),
            network_id: 4,       // Rinkeby's id
            gas: 5500000,        // Rinkeby 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)
        },

        kovan: {
            provider: () => new HDWalletProvider(mnemonic, `https://kovan.infura.io/v3/${infuraKey}`),
            network_id: 42,      // Kovan's id
            gas: 5500000,        // Kovan 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)
        },

        mainnet: {
            provider: () => new HDWalletProvider(mnemonic, `https://mainnet.infura.io/v3/${infuraKey}`),
            network_id: 1,       // Mainnet'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)
        },
    },

    // Configure your compilers
    compilers: {
        solc: {
            version: "0.4.24",    // Fetch exact version from solc-bin (default: truffle's version)
            settings: {          // See the solidity docs for advice about optimization and evmVersion
                optimizer: {
                    enabled: true,
                    runs: 10000
                }
            }
        }
    }
};