Blockchain & DeFi Library
How blockchains really work: hashing, chained blocks, proof of work, and smart contracts.
- Hashing
Turning any input into a fixed-size fingerprint that changes if the input does.
- Consensus (Proof of Work)
How a network agrees on the next block.
- Blocks & Chains
Blocks that each carry the previous block's hash, forming a chain.
- DeFi Basics
Concepts behind decentralized finance — conceptual, not advice.
- Wallets & Keys
Public/private keys that prove ownership and sign actions.
- Transactions
Signed transfers recorded on the chain.
- What Is a Blockchain?
A tamper-evident chain of data blocks shared across a network.
- Smart Contracts
Programs that run on a blockchain under fixed rules.