Deployment with Hardhat

Overview

Hardhat is a development tool for Ethereum, aiding in smart contract creation with features for compiling, testing, debugging, and deployment of Solidity code.

Clone the tutorial at https://github.com/MANTRA-Chain/omstead-hardhat-deployment-tutorial to get started.

Prerequisite

Install the dependencies

npm install --save-dev hardhat
npm install --save-dev @nomicfoundation/hardhat-toolbox

Using Hardhat Ignition

1. In your Hardhat project, add Remote Network to hardhat.config.js for MANTRA Omstead (COSMOS+EVM)

require("@nomicfoundation/hardhat-toolbox");

const { vars } = require("hardhat/config");

const TEST_PRIVATE_KEY = vars.get("TEST_PRIVATE_KEY");

/** @type import('hardhat/config').HardhatUserConfig */
module.exports = {
  solidity: "0.8.28",
  networks: {
    omstead: {
      url: `https://evm.dukong.mantrachain.io/`,
      chainId: 5887,
      accounts: [TEST_PRIVATE_KEY]
    },
  }
};

Example on how to configure variables for user-specific values in Hardhat:

npx hardhat vars set TEST_PRIVATE_KEY
✔ Enter value: ********************************

1. Compile

npx hardhat compile

1. Set Up Ignition Modules:

(We have created a sample module for you in the tutorial repository)

• Create a directory named ignition in the project's root directory.

• Inside the ignition directory, create another directory named modules.

• Within the modules directory, create a <YourFile>.js file.

Example directory structure:

./ignition/modules/<YourFile>.js

1. Deploy

To tell Hardhat to connect to a specific Ethereum network, you can use the --network parameter when running any task, like this:

npx hardhat ignition deploy ./ignition/modules/Token.js --network omstead

Example result from running the above command

$ npx hardhat ignition deploy ./ignition/modules/USDC.js --network omstead

✔ Confirm deploy to network omstead (5887)? … yes
Hardhat Ignition 🚀
Deploying [ TokenModule ]

Batch #1
  Executed TokenModule#Token

[ TokenModule ] successfully deployed 🚀

TokenModule#Token - <0xHash of the deployed contract>