Blockchain

How blockchain oracles provide external data to smart contracts, including data aggregation, update mechanisms, manipulation risk, and decentralized oracle designs.

A practical overview of decentralized finance, including automated exchanges, lending markets, stablecoins, liquidity pools, and the risks users should understand.

An introduction to smart contracts, deterministic execution, gas, oracles, composability, upgradeability, and the practical limits of on-chain code.

How blockchain scaling systems move activity away from the base layer, including optimistic rollups, zero-knowledge rollups, channels, and sidechains.

A balanced comparison of proof-of-work and proof-of-stake, focusing on resource costs, attack economics, validator participation, finality, and governance trade-offs.

A plain-language explanation of blockchain ledgers, transaction validation, blocks, consensus, nodes, and why decentralized systems trade efficiency for different trust assumptions.