How it works
Core Concepts
The technology under the hood: consensus, mining and staking, smart contracts, tokens and standards, layers and rollups, and the cryptography that ties it together.
22 free guides, in reading order
Consensus Mechanisms Explained
How thousands of strangers agree on one version of the truth without a central authority.
Proof of Work
The original consensus mechanism that secures Bitcoin — how mining races turn electricity into security.
Proof of Stake
The energy-efficient alternative to mining, and how validators replace miners.
Beyond PoW & PoS: Other Consensus Models
DPoS, Proof of History, Proof of Authority, and BFT-style consensus compared.
Crypto Mining Explained
What miners actually do, the hardware involved, and how block rewards work.
Staking Explained
How locking up coins helps secure a network and earns rewards — plus the risks involved.
Nodes & Validators
The computers that run the network — full nodes, validators, and why decentralization depends on them.
Cryptographic Hashing
The one-way math function at the heart of blockchain security.
Digital Signatures
How you prove you own crypto without revealing your private key.
Merkle Trees
The clever data structure that lets blockchains verify huge amounts of data efficiently.
The Mempool
The waiting room for unconfirmed transactions, and how it affects fees and speed.
Forks: Hard and Soft
What happens when a blockchain community disagrees — and how chains split.
Layer 1 vs Layer 2
Base blockchains versus the networks built on top to make them faster and cheaper.
Rollups: Optimistic vs ZK
The two main scaling approaches bundling transactions off-chain — how they differ.
Sidechains & Bridges
How assets move between blockchains — and why bridges are a major security risk.
Smart Contracts Explained
Self-executing programs on a blockchain — what they can and can't do.
The Ethereum Virtual Machine (EVM)
The world computer that runs smart contracts, and why "EVM-compatible" matters.
Token Standards: ERC-20, 721 & 1155
The blueprints that make tokens and NFTs interoperable across apps.
Stablecoins Explained
Crypto pegged to the dollar — how they hold their value and why they matter.
The Types of Stablecoins
Fiat-backed, crypto-backed and algorithmic — the mechanisms and their failure modes.
Wrapped Tokens
How a coin from one chain gets represented on another — WBTC, wETH and beyond.
Governance Tokens & DAOs
How communities make decisions on-chain and run organizations without managers.