truffle-config.js

require("dotenv").config();
const HDWalletProvider = require("@truffle/hdwallet-provider");

const mnemonic = process.env.MNEMONIC;

module.exports = {
  networks: {
    polygon_testnet: {
      /// This is used for deployment and truffle test
      provider: () =>
        new HDWalletProvider(mnemonic, `https://rpc-mumbai.maticvigil.com`), /// [Note]: New RPC Endpoint
      network_id: 80001,
      networkCheckTimeout: 9999,
      confirmations: 10,
      timeoutBlocks: 200,
      skipDryRun: true,
    },
  },

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

  // Configure your compilers
  compilers: {
    solc: {
      version: ">=0.4.22 <0.9.0", // Fetch exact version from solc-bin (default: truffle's version)
      settings: {
        // See the solidity docs for advice about optimization and evmVersion
        optimizer: {
          enabled: false,
          runs: 200,
        },
        evmVersion: "byzantium",
      },
    },
  },

  db: {
    enabled: false,
  },
};