Enterprise Smart Contract System — From Development to Security, Auditing, and Operations

Using EosJs, you can create a wallet and build a foundation for creating other Dapps.

Learn about blockchain by developing Ethereum-based DAPPs. You can also learn about practical development through the implementation of Smart Contracts.

For those who have only seen Ethereum’s structure in fragments, this guide brings wallets, transactions, smart contracts, and the EVM together into one coherent flow. You can follow along without a technical background.

How to view safe indicators and objective data that should not be missed when investing in Bitcoin and altcoins, and share real airdrop know-how and practical methods that made it from 0 won to 100 million won

Virtual assets and cryptocurrencies have driven financial innovation, but they are also being used as tools for crime, money laundering, and data breaches. This course starts with the basic concepts of virtual assets and blockchain, tracks actual cryptocurrency transaction flows, and analyzes suspicious fund movement structures.

You can understand metaverse technology in a short period of time, and we will teach you practical skills for creating metaverse worlds and issuing and selling NFTs without coding.

This lecture covers the basics of crypto investment, including the value and risks of Bitcoin, Ethereum, and other Layer 1s (Cosmos).

“I have the data, but I don’t know how to look at it.” This is the most common concern for those starting on-chain analysis for the first time. In this course, a 10-year veteran data analyst and on-chain researcher fully reveals all the tools and interpretation techniques used in actual market analysis. ㆍWhich indicators react first before coin prices move ㆍWhether whales are accumulating or dumping ㆍHow to read market sentiment through bridge and stablecoin flows ㆍHow to extract data via Etherscan and Dune without programming ㆍAnd the interpretation patterns and strategies used by professional analysts This course is designed to help you go beyond "just looking" at on-chain data and build an analytical framework that leads to actual investment decisions.

You can understand the core aspects of the entire crypto market and gain a better understanding of basic strategies for investing in altcoins. It helps you identify which areas to study in the investment and industrial sectors through the sectors that will be in the spotlight in the market after 2026.

This course is a hands-on practical session where you will build your own NFT marketplace using Solidity smart contracts, frontend technologies, and web3.js. Students will implement all marketplace features—from NFT minting to selling, buying, and deleting—and deploy them directly to the latest testnets: Ethereum Sepolia, Polygon Amoy, and Kaia Kairos. Additionally, you will learn how to use IPFS for the decentralized storage of NFT images and metadata, allowing you to experience a production-ready DApp architecture that goes beyond a simple demo. ✨ Key Features of This Course Full-Stack Learning: Covers React UI, smart contract writing, and multi-chain deployment all at once. Up-to-Date Environment: Supports Sepolia, Amoy, and Kairos testnets with MetaMask integration. Master the Core NFT Process: Image upload (IPFS) → Metadata creation → Minting → Marketplace trading. Practical & Hands-on: Gain real-world service development experience, including transaction handling, UX design, and multi-chain support.

For developers blocked by double payments and discrepancies between external payments and databases, I design and implement robust settlement systems based on hands-on experience with Toss’s backend.

Understand the basic concepts of AI and blockchain and learn how to apply them in real business scenarios. Beyond just theory, you will work on practical projects combining both technologies through a hands-on format to acquire the skills to master next-generation technology.