Introduction to Blockchain and Web3
About this courseSkip About this course
Developed by the Technical Education team at the Web3 Foundation, this course introduces the fundamental concepts of Blockchain technology and Web3.
First, we go over the history and the key terminology of blockchains, Bitcoin, Ethereum and Web3 and then take a deep dive into the technology that powers blockchains. The concepts of cryptography and hashing in the context of blockchains are explored along with hands-on activities that familiarize the learners with digital wallets and blockchain explorers. Next, we explore the concepts of block production and finality, consensus, nodes and networking in blockchain networks. Towards the end of the course, we will explore the blockchain layers and applications centered around networks like Bitcoin, Ethereum and Polkadot. We wrap up the course by exploring the current landscape of Web3 and the future of blockchain technology.
The course is open to learners from all backgrounds. The key objective of this course is to provide a strong foundational knowledge pertaining to Blockchain and Web3.
At a glance
What you'll learnSkip What you'll learn
The history of blockchain technology, the evolution of digital money and the motivation for decentralized systems
Concepts of Cryptography and Hashing in the context of blockchains
Using Crypto wallets and Blockchain explorers
The security implications and limitations of Blockchain networks
The key differences between Proof of Work (PoW) and Proof of Stake (PoS)
The advantages and disadvantages of the distributed consensus mechanisms
The different Blockchain nodes that help sustain a decentralized network
Layer 0, Layer 1 and Layer 2 Blockchains and their key applications
The technology powering Cryptocurrencies, Decentralized Finance (DeFi), NFTs and DAOs
The future prospects of Blockchain technology and Web3
Introduction to Blockchain. Blockchain terminology. Blockchain properties. Centralization vs Decentralization. Blockchains in action. A brief history of Money. Properties of Money. How is Money created? Chaumian E-Cash and the Issue of Double Spending.
Introduction to Bitcoin and Ethereum
Money backed by computation. Hashcash and Proof of Work. Bitcoin Blockchain. How Bitcoin solves double spend issue. Bitcoin Issuance. Introduction to Ethereum. Smart Contracts. Difference between Bitcoin and Ethereum. Ethereum Transactions.
Blockchain and Cryptography
Cryptography in Blockchain. Public/Private keypairs and how do wallets work?
Hashing and Block Mining
What is a Hash? Properties of Cryptographic Hashing. How Bitcoin blocks are mined? Anatomy of a Bitcoin Block. What is Forking? What is Hashpower? How can miners tamper with PoW? Energy implications of PoW. What are the other ways to mine/validate a Block? Proof of Stake.
Blockchain Nodes and Networking
Distributed systems. Can I run my own Blockchain node? How do Blockchain nodes communicate? Interfacing with Blockchain network. Full node vs Archive node vs light client. Consensus in depth.
Web3 and the Future of Blockchain
What problems can Blockchain solve? L0, L1 and L2 Blockchains. Anonymity and confidential transactions. zkledger. zkrollups. Scams and Attacks. Culture. Public policy. Regulations. Blockchain governance. Cryptocurrencies and DeFi. DAOs. Interoperability and Scalability. NFTs. Metaverse. Decentralized computing.