truffle-config.js

const HDWalletProvider = require('@truffle/hdwallet-provider');

require('dotenv').config();

const privateKey = process.env['PRIVATE_KEY'];
const infuraProjectId = process.env['INFURA_PROJECT_ID'];

module.exports = {
  networks: {
    localhost: {
      host: '127.0.0.1',
      port: 7545,
      network_id: '*'
    },
    ropsten: {
      provider: () =>
        new HDWalletProvider({
          privateKeys: [privateKey],
          providerOrUrl:
            'https://ropsten.infura.io/v3/' + infuraProjectId,
        }),
      network_id: 3,
      confirmations: 2,
      timeoutBlocks: 400,
      skipDryRun: true,
    },
    kovan: {
      provider: () =>
        new HDWalletProvider({
          privateKeys: [privateKey],
          providerOrUrl:
            'https://kovan.infura.io/v3/' + infuraProjectId,
        }),
      network_id: 42,
      confirmations: 2,
      timeoutBlocks: 400,
      skipDryRun: true,
    },
    rinkeby: {
      provider: () =>
        new HDWalletProvider({
          privateKeys: [privateKey],
          providerOrUrl:
            'https://rinkeby.infura.io/v3/' + infuraProjectId,
        }),
      network_id: 4,
      confirmations: 2,
      timeoutBlocks: 400,
      skipDryRun: true,
    },
    main: {
      provider: () =>
        new HDWalletProvider({
          privateKeys: [privateKey],
          providerOrUrl:
            'https://mainnet.infura.io/v3/' + infuraProjectId,
        }),
      network_id: 1,
      confirmations: 2,
      timeoutBlocks: 400,
      skipDryRun: true,
    },
    polygon: {
      provider: () =>
        new HDWalletProvider({
          privateKeys: [privateKey],
          providerOrUrl:
            'https://polygon-mainnet.infura.io/v3/' + infuraProjectId,
        }),
      network_id: 137,
      confirmations: 2,
      timeoutBlocks: 400,
      skipDryRun: true,
      chainId: 137,
    },
    mumbai: {
      provider: () =>
        new HDWalletProvider({
          privateKeys: [privateKey],
          providerOrUrl:
            'https://polygon-mumbai.infura.io/v3/' + infuraProjectId,
        }),
      network_id: 80001,
      confirmations: 2,
      timeoutBlocks: 400,
      skipDryRun: true,
      chainId: 80001,
    },
    besu: {
      provider: () =>
        new HDWalletProvider({
          privateKeys: [privateKey],
          providerOrUrl: 'http://127.0.0.1:8545'
        }),
      gas: 4700000,
      gasPrice: 0,
      network_id: '*',

    },
  },
  compilers: {
    solc: {
      version: "0.8.4",
      docker: false,
      settings: {
        optimizer: {
          enabled: true,
        }
      }
    }
  }
}