Learn the core principles behind blockchain technology, including how decentralized ledgers work, consensus mechanisms, and key terms like nodes, miners, and gas. Perfect for beginners starting their Web3 journey.
Consensus Mechanisms: Proof of Work vs Proof of Stake How networks agree on truth without a central authority, energy vs stake, miners vs validators. TL;DR: Proof of Work (PoW): miners burn electricity to secure the chain. Attacking requires massive energy & hardware. Proof of Stake (PoS): validators lock tokens (“stake”) to earn rewards. Attacking risks […]
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Gas Fees Explained (2025): Why Transactions Cost Money — and How to Pay Less Beginner → Intermediate Blockchain Basics • ~18–25 min read • Updated: 2025-11-07 TL;DR: Gas exists to price scarce block space and keep networks spam-resistant. On post-EIP-1559 Ethereum, each tx pays for gas used × (base fee + priority tip): the base
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Public & Private Keys Explained (Wallet Addresses, Seed Phrases, Signatures) Beginner → Intermediate Wallets & Security • ~14–16 min read • Updated: 2025-11-07 TL;DR: Your private key is a secret 256-bit number that controls an account. The public key is derived from it by a one-way operation (elliptic-curve multiplication). Your address is a short, shareable
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What Is a Blockchain? A Complete Beginner-to-Builder Guide (with Diagrams) Beginner Blockchain Basics Hands-on • Updated: 2025-11-07 TL;DR: A blockchain is a public, append-only database that many independent computers (nodes) keep in sync. Transactions are batched into blocks. Each block points to the previous block’s hash (a tamper-evident fingerprint), forming a chain. A consensus protocol
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