Creating an NFT Marketplace

Using a DApp (Decentralized Application)

NFT minting, listing, purchasing, and deleting all at once!

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Key Features

✅ NFT Issuance (Minting)
✅ Listing for Sale
✅ NFT Purchase
✅ NFT Deletion (Burning)

💡 Why jQuery?

Reasons for using jQuery instead of React:

• Low barrier to entry: No need to learn frameworks like React or Vue

• Ready to start immediately: Just add one line of CDN to your HTML and you're good to go

• Focus on blockchain learning: Focus on DApp development without complex frontend build configurations

• Basic JavaScript is all you need: Knowing functions, variables, and basic syntax is enough

🛠 Core Tech Stack to Learn

1. jQuery

• DOM manipulation and event handling

• User Interface Implementation

2. web3.js

• Connect with MetaMask

• Reading blockchain data

• Sending a transaction

• Smart contract function call

3. ERC-721 Standard

• NFT token creation (mint)

• Transfer of ownership (transfer)

• Token burning (burn)

• Implementing Sales Logic

4. IPFS

• NFT image storage

• Metadata Upload

• Decentralized File Management

📱 Supported Blockchain Networks

In this lecture, we will deploy to three testnets:

| Network | Features | Reason for Use |
| :--- | :--- | :--- |
| Ethereum Sepolia | Most common testnet | Testing before mainnet deployment |
| Polygon Amoy | Fast and cheap transactions | Experiencing real-world usage environments |
| Kaia Kairos | Kakao blockchain testnet | Integration with the domestic ecosystem |

Since it's a testnet, it doesn't cost real money!

What you will learn

🤔 Have you ever had these concerns?

I'm interested in blockchain development, but...

❓ "DApp development feels overwhelming because frameworks like React are difficult"

❓ "I want to write smart contracts with Solidity, but I don't know where to start."

❓ "I want to mint an NFT myself, but I don't know how"

❓ "I've heard of IPFS, but I don't know how to actually use it."

❓ "I've installed MetaMask, but I don't know how to connect it to a DApp."

❓ "I'm curious about how to read and write blockchain data using web3.js"

❓ "I want to try building an NFT marketplace using the ERC-721 standard"

❓ "I want to try deploying to various blockchain networks (Ethereum, Polygon, Kaia)"

✨ You can solve all of these in this course!

📚 What you can learn through this course:

✅ Developing DApps with jQuery

• You don't even need React! Start with the JavaScript you're already familiar with.

✅ Writing Solidity Smart Contracts

• Implementation of ERC-721 standard-based NFT contract

• Development of minting, selling, purchasing, and burning functions

✅ IPFS file upload

• Store images and metadata on decentralized storage

• Learning how to permanently store NFTs

✅ NFT Minting Implementation

• Form data collection → IPFS upload → Blockchain recording

• Building a functional NFT minting system

✅ NFT Trading Features

• Listing for Sale: Posting my NFT on the market

• Purchase function: Buying NFTs with Ethereum

• Delete function: Implement token burning (burn)

✅ web3.js blockchain communication

• Connect MetaMask

• Smart contract function call

• Transaction processing

✅ Multi-chain Deployment

• Ethereum Sepolia Testnet

• Polygon Amoy Testnet

• Kaia Kairos Testnet

✅ Complete NFT Marketplace

• A fully functional full-stack DApp ready for real-world use

• Projects that can be used for a portfolio

Introducing the instructor 👩‍💻

Hello, I am Kyung-il In.