Blockchain
The shared, tamper-evident ledger technology underlying every cryptocurrency — how blocks link together, how consensus is reached, and why that design matters before anything else does.
13 guides in this category, ordered from beginner to advanced.
Blockchain guides
What Is Blockchain?
A clear introduction to blockchain technology and how it works.
5 min read · 13 related concepts
Public, Private, and Permissioned Blockchains
How open public blockchains differ from private and permissioned networks, and why the distinction matters.
5 min read · 1 related concept
What Is Web3?
What the term "Web3" actually refers to, the technologies usually grouped under it, and why it remains a genuinely contested concept rather than a settled standard.
7 min read · 6 related concepts
Proof of Work vs. Proof of Stake
A clear comparison of blockchain's two most common consensus mechanisms — how each secures a network and what trade-offs each makes.
7 min read · 15 related concepts
What Is a Blockchain Fork?
A clear explanation of hard forks and soft forks — how blockchain protocol changes happen and what each type means in practice.
6 min read · 3 related concepts
Consensus Mechanisms Compared
A closer look at how proof of work, proof of stake, and other consensus mechanisms actually differ.
7 min read · 12 related concepts
How Staking Rewards Actually Work
What actually determines a staking reward's size, and the costs and risks that reduce it from the advertised rate.
6 min read · 14 related concepts
How to Read a Validator's Commission and Uptime History Before Delegating
The specific validator metrics worth checking before delegating your stake, and what each one actually tells you.
5 min read · 4 related concepts
Layer 2 Scaling and Trade-offs
A deeper look at why base blockchains hit limits, how Layer 2 networks address them, and what trade-offs they introduce.
6 min read · 22 related concepts
Understanding the Blockchain Scalability Trilemma
Why blockchains tend to trade off between decentralization, security, and scalability.
6 min read · 6 related concepts
Understanding Finality in Blockchain Networks
The difference between probabilistic and absolute finality, and why it matters.
6 min read · 1 related concept
Interoperability Between Blockchains
How different blockchain networks communicate and exchange value, and the common approaches.
6 min read · 3 related concepts
How Oracle Price Feeds Actually Work, Step by Step
The actual mechanical sequence behind getting real-world price data onto a blockchain for a smart contract to use.
6 min read · 4 related concepts
Key terms in this category
Node
Read the Node glossary definition
Block Height
Read the Block Height glossary definition
Mainnet
Read the Mainnet glossary definition
Testnet
Read the Testnet glossary definition
Genesis Block
Read the Genesis Block glossary definition
Mempool
Read the Mempool glossary definition
Confirmation
Read the Confirmation glossary definition
Pseudonymity
Read the Pseudonymity glossary definition
On-Chain
Read the On-Chain glossary definition
Off-Chain
Read the Off-Chain glossary definition
Decentralization
Read the Decentralization glossary definition
Blockchain
Read the Blockchain glossary definition
Peer-to-Peer Network
Read the Peer-to-Peer Network glossary definition
Web3
Read the Web3 glossary definition
Hash Function
Read the Hash Function glossary definition
Merkle Tree
Read the Merkle Tree glossary definition
Consensus Mechanism
Read the Consensus Mechanism glossary definition
Finality
Read the Finality glossary definition
51% Attack
Read the 51% Attack glossary definition
Validator
Read the Validator glossary definition
Delegated Proof of Stake
Read the Delegated Proof of Stake glossary definition
Slashing
Read the Slashing glossary definition
Nothing-at-Stake Problem
Read the Nothing-at-Stake Problem glossary definition
Hard Fork
Read the Hard Fork glossary definition
Soft Fork
Read the Soft Fork glossary definition
Replay Protection
Read the Replay Protection glossary definition
Nakamoto Consensus
Read the Nakamoto Consensus glossary definition
Proof of Authority
Read the Proof of Authority glossary definition
Proof of Burn
Read the Proof of Burn glossary definition
Proof of History
Read the Proof of History glossary definition
Sybil Attack
Read the Sybil Attack glossary definition
Eclipse Attack
Read the Eclipse Attack glossary definition
Byzantine Fault Tolerance
Read the Byzantine Fault Tolerance glossary definition
Staking
Read the Staking glossary definition
Commission Rate (Validator)
Read the Commission Rate (Validator) glossary definition
Unbonding
Read the Unbonding glossary definition
Sharding
Read the Sharding glossary definition
Sidechain
Read the Sidechain glossary definition
Rollup
Read the Rollup glossary definition
Zero-Knowledge Proof
Read the Zero-Knowledge Proof glossary definition
Cross-Chain Bridge
Read the Cross-Chain Bridge glossary definition
Interoperability
Read the Interoperability glossary definition
zk-SNARK
Read the zk-SNARK glossary definition
zk-STARK
Read the zk-STARK glossary definition
Layer 2
Read the Layer 2 glossary definition
Layer 1
Read the Layer 1 glossary definition
Gas Fee
Read the Gas Fee glossary definition
Optimistic Rollup
Read the Optimistic Rollup glossary definition
Blockchain Trilemma
Read the Blockchain Trilemma glossary definition
Consensus Finality
Read the Consensus Finality glossary definition
Inter-Blockchain Communication (IBC)
Read the Inter-Blockchain Communication (IBC) glossary definition
Omnichain
Read the Omnichain glossary definition
Oracle
Read the Oracle glossary definition