truffle-config.js

const HDWalletProvider = require("@truffle/hdwallet-provider");
const fs = require("fs");
const mnemonic = fs.readFileSync(".mnemonic").toString().trim();
const infuraKey = fs.existsSync(".infura") ? fs.readFileSync(".infura").toString().trim() : undefined;

module.exports = {
  /**
   * Networks define how you connect to your ethereum client and let you set the
   * defaults web3 uses to send transactions.
   * 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 port (default: none)
      network_id: "*", // Any network (default: none)
    },
    // One might need to adjust the gasPrice for some chains. The default value is 20 gwei.
    ethereum: {
      provider: () =>
        new HDWalletProvider({
          mnemonic: mnemonic,
          providerOrUrl: `wss://mainnet.infura.io/ws/v3/${infuraKey}`,
          chainId: 1,
        }),
      network_id: 1,
      gas: 3000000,
      confirmations: 2,
      networkCheckTimeout: 9000000,
      timeoutBlocks: 200,
      skipDryRun: true,
    },
    kovan: {
      provider: () =>
        new HDWalletProvider({
          mnemonic: mnemonic,
          providerOrUrl: `wss://kovan.infura.io/ws/v3/${infuraKey}`,
          chainId: 42,
        }),
      network_id: 42,
      gas: 3000000,
      confirmations: 2,
      networkCheckTimeout: 90000,
      timeoutBlocks: 200,
      skipDryRun: true,
    },
    ropsten: {
      provider: () =>
        new HDWalletProvider({
          mnemonic: mnemonic,
          providerOrUrl: `wss://ropsten.infura.io/ws/v3/${infuraKey}`,
          chainId: 3,
        }),
      network_id: 3, // Ropsten's id
      gas: 3000000, // Ropsten has a lower block limit than mainnet
      confirmations: 1, // # of confs to wait between deployments. (default: 0)
      networkCheckTimeout: 90000, // Seems like the default value was not enough
      timeoutBlocks: 200, // # of blocks before a deployment times out  (minimum/default: 50)
      skipDryRun: true, // Skip dry run before migrations? (default: false for public nets )
    },
    bsc: {
      provider: () =>
        new HDWalletProvider({
          mnemonic: mnemonic,
          providerOrUrl: `https://bsc-dataseed1.binance.org`,
          chainId: 56,
        }),
      network_id: 56,
      gas: 3000000,
      confirmations: 10,
      timeoutBlocks: 200,
      skipDryRun: true,
    },
    bsctest: {
      provider: () =>
        new HDWalletProvider({
          mnemonic: mnemonic,
          providerOrUrl: `https://data-seed-prebsc-1-s1.binance.org:8545`,
          chainId: 97,
        }),
      network_id: 97,
      gas: 3000000,
      confirmations: 10,
      networkCheckTimeout: 5000,
      timeoutBlocks: 200,
      skipDryRun: true,
    },
    polygon: {
      provider: () =>
        new HDWalletProvider({
          mnemonic: mnemonic,
          providerOrUrl: `wss://ws-matic-mainnet.chainstacklabs.com`,
          chainId: 137,
        }),
      network_id: 137,
      gas: 3000000,
      gasPrice: 5000000000,
      confirmations: 2,
      timeoutBlocks: 200,
      skipDryRun: true,
    },
    mumbai: {
      provider: () =>
        new HDWalletProvider({
          mnemonic: mnemonic,
          providerOrUrl: `https://rpc-mumbai.matic.today`,
          chainId: 80001,
        }),
      network_id: 80001,
      gas: 3000000,
      confirmations: 2,
      timeoutBlocks: 200,
      skipDryRun: true,
    },
  },

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

  // Configure your compilers
  compilers: {
    solc: {
      version: "0.8.6", // 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"
      // }
    },
  },
};