truffle-config.js

require('dotenv').config();

const phrase = process.env.IOTA_WASP_MNEMONIC;
const url = process.env.IOTA_WASP_URL;
const chain = process.env.IOTA_WASP_CHAIN;
const providerOrUrl = `${url}/wasp/api/v1/chains/${chain}/evm`;

const HDWalletProvider = require('@truffle/hdwallet-provider');
const provider = new HDWalletProvider({
  mnemonic: {
    phrase,
  },
  providerOrUrl,
});

// insert the private key of the account used in metamask eg: Account 1 (Miner Coinbase Account)

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)
    },

    iota: {
      provider: provider,
      //from: account,
      //gas: 7721975,
      network_id: '*',
    },
  },

  // Set default mocha options here, use special reporters etc.
  mocha: {
    // timeout: 100000
  },

  // Configure your compilers
  compilers: {
    solc: {
      version: '^0.8.0', // 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"
      // }
    },
  },
};