truffle-config.js

const path = require("path");
const HDWalletProvider = require("@truffle/hdwallet-provider");
const fs = require('fs');
const mnemonic = fs.readFileSync(".secret").toString().trim();


module.exports = {
 
   contracts_build_directory: path.join(__dirname, "client/src/contracts"),

  networks: {
   
    develop:{
      port:8545
    },
    development: {
     host: "127.0.0.1",     // Localhost (default: none)
     port: 8545,            // Standard Ethereum port (default: none)
     network_id: "*",       // Any network (default: none)
    },
    maticTest: {
      provider: () => new HDWalletProvider(mnemonic, `https://rpc-mumbai.maticvigil.com/`),
      network_id: 80001,
      confirmations: 2,
      timeoutBlocks: 200,
      skipDryRun: true
    },
    maticMainNet: {
      provider: () => new HDWalletProvider(mnemonic, `https://rpc-mumbai.matic.today`),
      network_id: 137,
      confirmations: 2,
      timeoutBlocks: 200,
      skipDryRun: true
    },


   
  },

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

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

  // Truffle DB is currently disabled by default; to enable it, change enabled: false to enabled: true
  //
  // Note: if you migrated your contracts prior to enabling this field in your Truffle project and want
  // those previously migrated contracts available in the .db directory, you will need to run the following:
  // $ truffle migrate --reset --compile-all

  db: {
    enabled: false
  }
};