Smart Contract Deployment Guide

Open a new folder in your text editor

Create another new folder inside that folder

mkdir samplefolder

cd samplefolder

npm init

Answer (y) to all the questions asked

Now you wil have a package.json file in your "samplefolder"

Run this to install hardhat to our project, hardhat provides a developent environment for testing and deploying decentralised applications.

npm install --save-dev hardhat

npx hardhat

Select create an empty hardhat.config.js file option using your arrow keys.

This will generate a hardhat.config.js file for us, which is where we’ll specify all of the set up for our project

Create two folders "contracts" and "scripts" in the root directory of our project using

mkdir contracts

mkdir scripts

contracts/ is where we’ll keep our hello world smart contract code file

scripts/ is where we’ll keep scripts to deploy and interact with our contract

Create a new file inside our contracts folder with a .sol extension to write our smart contract say SampleContract.sol

Create a dotenv file in the root directory of our project to store our API Keys and Private Keys

npm install dotenv --save

And now create a .env file in the root directory of our project, Your .env should look like this:

ALCHEMY_API_KEY = "https://eth-goerli.alchemyapi.io/v2/your-api-key"
PRIVATE_KEY = "your-metamask-private-key"

Go to your metamask wallet, Select an account and then copy it's Private Key and paste it in .env file

Go to Alchemy and create a new app using Ethereum chain and Goerli Network, click on view keys and copy the API Key and paste it in .env file

Run this command to install Ethers.js for interacting with our smart contract SampleContract.sol file and read data from the blockchain.

Update your hardhat.config.js to this for updating our project with the dependencies we have added

/**
* @type import('hardhat/config').HardhatUserConfig
*/

require('dotenv').config();
require("@nomiclabs/hardhat-ethers");

const { ALCHEMY_API_KEY, PRIVATE_KEY } = process.env;

module.exports = {
   solidity: "0.8.9",
   defaultNetwork: "goerli",
   networks: {
      hardhat: {},
      goerli: {
         url: ALCHEMY_API_KEY,
         accounts: [`0x${PRIVATE_KEY}`]
      }
   },
}

Run this commmand to compile your smart contract

npx hardhat compile

This will create a new folder artifacts in our project repository and in contracts folder of this folder, we will get a ``SampleContract.js" file which contains contract's ABI and Bytecode.

Go to scripts folder and create a new file deploy.js and paste this code in that file.

async function main() {
   const SampleContract = await ethers.getContractFactory("SampleContract");

   // Start deployment, returning a promise that resolves to a contract object
   const sampleContract = await HelloWorld.deploy();
   await sampleContract.wait()
   console.log("Contract deployed to address:", sampleContract.address);
}

main()
  .then(() => process.exit(0))
  .catch(error => {
    console.error(error);
    process.exit(1);
  });

Finally to deploy your contract, run:

npx hardhat run scripts/deploy.js --network goerli

uday03meh/smart-contract-deployment

Smart Contract Deployment Guide