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Blockchain

Medium — good to knowBackend

ELI5 — The Vibe Check

A digital ledger that nobody owns but everyone can verify. Imagine a Google Doc where every edit is permanent, nobody can delete history, and thousands of computers all keep the same copy. That's blockchain. It's the tech behind crypto, NFTs, and an unfortunate number of startup pitch decks.

Real Talk

A blockchain is a distributed, append-only data structure where blocks of transactions are cryptographically linked. Consensus mechanisms (Proof of Work, Proof of Stake) ensure agreement across nodes without a central authority. It provides immutability, transparency, and decentralization at the cost of throughput and energy.

When You'll Hear This

"Does this actually need a blockchain or just a database?" / "Blockchain is a solution looking for a problem — except for the problems it actually solves."

Related Terms

Smart Contract

Code that runs on a blockchain — once deployed, nobody can change it (which is either amazing or terrifying).

intermediateBackend

Web3

The idea that the next internet should be decentralized — owned by users, not big companies.

beginnerBackend
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