Blockchain Basics

Build your foundational blockchain knowledge and unlock your future as a blockchain developer or web3 professional. The all-new Blockchain Basics is a comprehensive, beginner-friendly course designed to take you from zero to proficient in blockchain fundamentals in just a few hours. You’ll gain a deep understanding of how decentralized technologies work, from sending your first transaction to grasping the core architecture of blockchain systems.

This is the most up-to-date and practical blockchain fundamentals course available anywhere. It teaches you what actually matters: how blockchain networks operate, what wallets do, how smart contracts create trust minimized agreements, and why decentralization changes the game for ownership and innovation.

Blockchain Basics blends theoretical clarity with engaging, hands-on activities like setting up your first wallet, sending testnet transactions, and interacting with protocols.

Alongside technical skills, you’ll build critical mental models for understanding gas, signatures, consensus mechanisms, and the lifecycle of a blockchain transaction.

The course will also introduce you to key real-world use cases such as DeFi, NFTs, RWAs, DEXs, and stablecoins, and explain why these technologies are reshaping industries.

Even if you’re brand new to web3, this course will guide you step-by-step through complex topics with clarity. And, guide you to deeper learning based on your preferred career.

Here’s why thousands of learners choose Cyfrin Updraft to start their blockchain journey:

• Updraft curriculum is updated constantly to reflect industry trends, the latest tools, and network changes.
• Courses are taught by the industry’s leading smart contract developers, auditors, and blockchain educators.
• Content is designed and built using student feedback, user research, and real-world protocol examples.
• Over 200,000 students have used Updraft to start or grow their blockchain careers.
• Many have gone on to become engineers, auditors, product managers, or founders in the web3 space.

Blockchain Basics is packed with helpful videos, written guides, visual explainers, and demo applications. Lessons include full transcripts, and the Updraft Discord community is always available for help, feedback, and discussion.

Whether you want to become a developer, understand DeFi, or transition your web2 skills to web3, this course is the course for you!

You will learn:

• How Proof of Work and Proof of Stake blockchains function
• The oracle problem and why it matters
• Wallet setup, testnet usage, and gas mechanics
• The structure and lifecycle of on-chain transactions
• Intro to account abstraction and EIP-4337
• Blockchain attack vectors: MEV, 51% attacks, Sybil attacks and blockchain reorganisations
• The role of rollups and why L2s like ZKsync are important

When you complete this course, you’ll have a strong, working understanding of blockchain fundamentals, enough to hold your own in any conversation and to start building or contributing to web3 projects.

As a Cyfrin Updraft student, you get lifetime access to every course, along with detailed tutorials, helpful resources, quizzes, code repositories, and more. You can also join a vibrant Discord community of learners and developers ready to support your journey.

What are you waiting for? Start learning Blockchain Basics today and take your first step into the future of decentralized technology with Cyfrin Updraft!