truffle-config.js

const fs = require('fs');
const mnemonic = fs.readFileSync(".secret").toString().trim();

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

module.exports = {

  networks: {
    development: {
     host: "127.0.0.1",     // Localhost (default: none)
     port: 8545,            // Standard Ethereum port (default: none)
     network_id: "*",       // Any network (default: none)
    },
    
    matic: {
      provider: () => new HDWalletProvider(mnemonic, `https://rpc-mumbai.maticvigil.com`),
      network_id: 80001,
      confirmations: 2,
      timeoutBlocks: 200,
      skipDryRun: true
    },
  },

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

  // Configure your compilers
  compilers: {
    solc: {
      version: "0.8.19",      // Fetch exact version from solc-bin (default: truffle's version)
    }
  },

};