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
contractsin root where we will store our contracts - Create a file in
contracts/MyToken.solwhich 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.jsasync 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
Last modified 11mo ago