How to deploy two smart contracts consequently on RSK via Hardhat?

When deploying smart contracts on RSK using Hardhat, several key steps must be followed. Here, I will provide a detailed description of these steps and illustrate how to deploy two specific smart contracts.

Step 1: Environment Setup

First, ensure that Node.js and NPM are installed in your development environment. Next, install Hardhat. Open your terminal and run the following command:

bash
npm install --save-dev hardhat

Step 2: Initialize Hardhat Project

In your chosen working directory, initialize a new Hardhat project:

bash
npx hardhat

Select to create a basic project and follow the prompts. This will generate configuration files and directories.

Step 3: Install Necessary Dependencies

To deploy contracts on the RSK network, install required plugins such as @nomiclabs/hardhat-ethers (for Ethers.js integration) and @nomiclabs/hardhat-web3 (for Web3.js integration). Run the following command in the terminal:

bash
npm install --save-dev @nomiclabs/hardhat-ethers ethers @nomiclabs/hardhat-web3 web3

Step 4: Configure Hardhat

Edit the hardhat.config.js file to add RSK network configuration. You can configure RSK Testnet or Mainnet; here, we'll add RSK Testnet as an example:

javascript
require("@nomiclabs/hardhat-ethers");
require("@nomiclabs/hardhat-web3");

module.exports = {
  solidity: "0.8.4",
  networks: {
    rskTestnet: {
      url: "https://public-node.testnet.rsk.co",
      accounts: [`0x${process.env.PRIVATE_KEY}`]
    }
  }
};

Ensure you have a valid RSK Testnet wallet address and corresponding private key.

Step 5: Write Smart Contracts

Create two new smart contract files in the project's contracts directory, such as ContractA.sol and ContractB.sol. Below is an example of a simple ERC20 token contract:

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

import "@openzeppelin/contracts/token/ERC20/ERC20.sol";

contract TokenA is ERC20 {
  constructor() ERC20("TokenA", "TKA") {
    _mint(msg.sender, 10000 * (10 ** uint256(decimals())));
  }
}

Create a different contract for ContractB.sol.

Step 6: Compile Contracts

Run the following command in the terminal to compile your smart contracts:

bash
npx hardhat compile

Step 7: Write Deployment Script

Create a deployment script in the scripts directory, such as deploy.js, for deploying your smart contracts:

javascript
async function main() {
  const [deployer] = await ethers.getSigners();

  console.log("Deploying contracts with the account:", deployer.address);

  const TokenA = await ethers.getContractFactory("TokenA");
  const tokenA = await TokenA.deploy();
  console.log("TokenA deployed to:", tokenA.address);

  // Repeat the preceding steps to deploy ContractB
}

main().catch((error) => {
  console.error(error);
  process.exitCode = 1;
});

Step 8: Deploy Smart Contracts to RSK

Execute the following command to deploy your smart contracts to the RSK Testnet:

bash
npx hardhat run scripts/deploy.js --network rskTestnet

The above steps demonstrate how to deploy two smart contracts on the RSK network using Hardhat. Each step is essential for a smooth deployment process.