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Using Hardhat
This article will show you how to compile, deploy, and interact with smart contracts using Hardhat on ICE testnet.
​Hardhat is a development environment that allows developers to test, compile, deploy, and debug dApps based on EVM. It helps developers in managing many of the responsibilities associated with constructing dApps and smart contracts. Because hardhat can interface directly with ICE's ethereum api, it can be used to deploy smart contract on ICE network.
Here we are going to deploy an ERC-20 contract using openzeppelin.

Create a directory to store all the files
mkdir hardhat-tutorial && cd hardhat-tutorial

Initialize npm package and install following dependencies.
npm init -y
npm install --save-dev hardhat
npm install ethers @nomiclabs/hardhat-waffle @nomiclabs/hardhat-ethers
npm install @openzeppelin/contracts

In the same directory run:
npx hardhat
select Create an empty hardhat.config.js with your keyboard and hit enter

Lets create our ERC-20 smart contract
  • Create a directory contracts in root where we will store our contracts
  • Create a file in contracts/MyToken.sol which ERC20 token smart contract.
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.2;
​
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
​
contract MyToken is ERC20, Ownable {
constructor() ERC20("MyToken", "MTK") {
_mint(msg.sender, 1000 * 10 ** decimals());
}
​
function mint(address to, uint256 amount) public onlyOwner {
_mint(to, amount);
}
}
NOTE: The above contract can be generated from contracts wizard with a mint value of 1000 tokens and feature set to mintable.

Modifying hardhat configuration file, add Arctic testnet entries to hardhat.config.js file in the url parameter.
require("@nomiclabs/hardhat-waffle");
const ICE_PRIVATE_KEY = "your private key";
module.exports = {
solidity: "0.8.2",
networks: {
testnet: {
url: `https://arctic-rpc.icenetwork.io:9933`,
accounts: [`0x${ICE_PRIVATE_KEY}`]
}
}
};

Compile the contract
npx hardhat compile

Lets create a new directory scripts inside project's root directory and paste following code in scripts/deploy.js
async function main() {
const [deployer] = await ethers.getSigners();
console.log("Deploying contracts with the account:", deployer.address);
console.log("Account balance:", (await deployer.getBalance()).toString());
const Token = await ethers.getContractFactory("MyToken");
const token = await Token.deploy();
console.log("Token address:", token.address);
}
main()
.then(() => process.exit(0))
.catch((error) => {
console.error(error);
process.exit(1);
});
Finally run:
npx hardhat run scripts/deploy.js --network testnet
After deployment is successful, we will get the contract address where our token is deployed
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Create Project
Initialize npm package and install dependencies
Run Hardhat
Create Smart Contract
Modify Config file
Compile
Deploy