Day 2: Building Counter Program on LazAI

Hyperion Guilds Builders Guild
1

LazAI provides a testnet environment for deploying smart contracts. In this guide, we use Hardhat to build, deploy, and test a simple Counter contract.

Network Information

Key Contract Addresses (Testnet)

  • Data Registry: 0xEAd077726dC83ecF385e3763ed4A0A50E8Ac5AA0
  • Verified Computing: 0x815da22D880E3560bCEcc85b6e4938b30c8202C4
  • Data Anchoring Token (DAT): 0x2eD344c586303C98FC3c6D5B42C5616ED42f9D9d

Prerequisites

  • Node.js v14+
  • npm or yarn
  • Git
  • Code editor (VS Code recommended)
  • Optional: MetaMask wallet with testnet tokens

Step 1: Setup Hardhat Project

mkdir counter-project
cd counter-project
npm init -y
npm install — save-dev hardhat @nomicfoundation/hardhat-toolbox @nomicfoundation/hardhat-ignition dotenv
npx hardhat

Step 2: Write Smart Contract

contracts/Counter.sol

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

contract Counter {
uint256 private count;

function increment() public { count += 1; }
function decrement() public { count -= 1; }
function getCount() public view returns (uint256) { return count; }
}

Step 3: Compile Contracts

npx hardhat compile

Step 4: Create Deployment Script

ignition/Counter.js

const { buildModule } = require(“@nomicfoundation/hardhat-ignition/modules”);

module.exports = buildModule(“CounterModule”, (m) => {
const counter = m.contract(“Counter”);
return { counter };
});

Step 5: Configure Network

Create .env file:

PRIVATE_KEY=your_private_key_here

Update hardhat.config.js:

require(“@nomicfoundation/hardhat-toolbox”);
require(“dotenv”).config();

module.exports = {
solidity: “0.8.28”,
networks: {
hardhat: { chainId: 31337 },
lazai: {
url: “https://testnet.lazai.network",
chainId: 133718,
accounts: [process.env.PRIVATE_KEY],
},
},
};

Step 6: Deploy Contract

  • Local Deployment (Optional)

npx hardhat node
npx hardhat ignition deploy ignition/modules/Counter.js --network localhost

LazAI Testnet Deployment

npx hardhat ignition deploy ignition/modules/Counter.js — network lazai

Step 7: Test Contract

test/Counter.js

const { expect } = require(“chai”);

describe(“Counter”, function () {
it(“Should increment the counter”, async function () {
const Counter = await ethers.getContractFactory(“Counter”);
const counter = await Counter.deploy();
await counter.deployed();

await counter.increment();
expect(await counter.getCount()).to.equal(1);
});
});

Run tests:

npx hardhat test

Github reference — Click here !!!

1 Like
2

good content gonna start with this gLazAI @gokkull_15

1 Like