Build your own blockchain step by step
Follow these lessons in order to build a complete blockchain system, starting from a simple hash and progressing to a distributed network with tokens!
This is where everything comes together! You'll build an actual blockchain by progressively adding features:
Start with the foundation: SHA-256 hashing. See how blockchain uses cryptographic hashes to ensure data integrity and create unique block identifiers.
Build your first block! Learn about block structure, nonce values, mining difficulty, and proof-of-work. Mine blocks and see how changing data invalidates the block.
Connect multiple blocks into a chain! Understand how blocks reference each other, why tampering breaks the chain, and how the longest valid chain wins.
Distribute your blockchain across a peer-to-peer network! Learn about consensus, network synchronization, and how nodes agree on the valid chain.
Add value to your blockchain! Implement a token system to track digital assets, create transactions, and manage balances on your distributed blockchain.
You've built a blockchain! Now learn how Bitcoin implements these concepts in the real world with advanced features.
After completing these lessons, you'll have built a fully functional blockchain from scratch! Next, explore Bitcoin to see how the world's first cryptocurrency implements blockchain technology.