Solana processes thousands of transactions per second using Proof of History and parallel execution. Here's the actual mechanism behind the speed — and the trade-offs it creates.

XRP uses federated Byzantine agreement — no mining, no staking. Validators vote using trusted node lists, and finality is deterministic in 3–5 seconds. This explains the mechanism, the UNL architecture, and where the security trade-offs actually live.

Sidechains are separate blockchains connected to a main chain via a two-way bridge. They don't inherit main chain security — that's the trade-off. This post explains the mechanism, bridge security models, and why the design distinction matters.

State channels let two parties transact off-chain and settle only the final balance on-chain. The mechanism, constraints, and where this fits in the Layer 2 landscape.

Blockchain finality is the point at which a transaction becomes practically irreversible. Bitcoin achieves it probabilistically through accumulated proof of work. Ethereum now achieves it cryptoeconomically through validator attestation. Here's how the mechanism actually differs — and why the distinction matters for settlement, bridges, and infrastructure design.

Flash loans are uncollateralized DeFi loans that must be borrowed and repaid within a single transaction. The mechanism, legitimate use cases, exploit context, and constraints explained.

DeFi lending protocols liquidate undercollateralized positions automatically. Here's how the mechanism works, who executes liquidations, and what cascade risk looks like in practice.

Perpetual futures are the dominant trading instrument in crypto by volume. Here's how the funding rate, mark price, and liquidation systems actually work.

A derivative is a contract whose value comes from an underlying asset — not the asset itself. This explains futures, perpetual swaps, options, the funding rate mechanism, and where each instrument lives in the market.

An order book is the mechanism through which buyers and sellers establish price on an exchange. This post explains how bids, asks, and matching engines work — and where AMMs fit in.

Hardware wallets secure crypto by storing private keys in a tamper-resistant chip. Transaction signing happens inside the device — the key never leaves, even on a fully compromised host computer.

Multi-signature wallets require M-of-N private keys to authorize a transaction. This post explains the threshold structure, how Bitcoin and Ethereum implement it differently, and where the real tradeoffs live.