Hardhat deployment scripts in Blockchain / Solidity - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the main purpose of a Hardhat deployment script?

A Hardhat deployment script automates the process of deploying smart contracts to a blockchain network, making it easier and repeatable.

beginner

In a Hardhat deployment script, what does the function hre.ethers.getContractFactory do?

It creates a contract factory object that allows you to deploy new instances of a smart contract.

beginner

Why do we use await when deploying contracts in Hardhat scripts?

Because deploying contracts is an asynchronous operation that takes time, await ensures the script waits for deployment to finish before moving on.

intermediate

What is the role of the main function in a Hardhat deployment script?

The main function contains the deployment logic and is executed to deploy contracts. It is usually wrapped in a try-catch block to handle errors.

intermediate

How can you pass constructor arguments to a contract during deployment in a Hardhat script?

You pass constructor arguments as parameters to the deploy method of the contract factory, e.g., Contract.deploy(arg1, arg2).

What does hre stand for in Hardhat deployment scripts?

A Hardhat Runtime Environment

B Hardhat Remote Execution

C Hardhat Resource Engine

D Hardhat React Extension

hre is the Hardhat Runtime Environment, which provides access to Hardhat's functionalities in scripts.

Which keyword is used to wait for a contract deployment to complete in a Hardhat script?

A await

B defer

C wait

D pause

await pauses the script until the asynchronous deployment finishes.

How do you handle errors in a Hardhat deployment script?

A Using <code>if-else</code> statements

B Using <code>try-catch</code> blocks

C Using <code>switch-case</code>

D No error handling is needed

try-catch blocks catch errors during deployment and allow graceful handling.

What command runs a Hardhat deployment script?

A hardhat deploy

B npm start <script>

C npx hardhat run <script>

D node deploy.js

The command npx hardhat run executes deployment scripts using Hardhat.

Where do you usually specify the network to deploy to in Hardhat?

A In the deployment script

B In the package.json file

C In the smart contract code

D In the Hardhat config file

The network is configured in the Hardhat config file, which the deployment script uses.

Explain the steps to write a basic Hardhat deployment script for a smart contract.

Think about how you prepare, deploy, and handle errors in the script.

Describe how constructor arguments are passed during contract deployment in Hardhat scripts.

Focus on the deploy method call and its parameters.