Build a Simple Blockchain in Node.js: A 200‑Line Tutorial
This article introduces the fundamental concept of blockchain as a sequential, distributed ledger, then walks through a concise Node.js implementation of a minimal blockchain in roughly 200 lines of code, providing a practical foundation for readers interested in exploring blockchain development.
The basic concept of blockchain is simple: a distributed database that links data blocks in chronological order. Yet the term is often conflated with the problems it aims to address, such as the currently popular Bitcoin and Ethereum, and is closely tied to transactions, smart contracts, and cryptocurrencies, which can obscure public understanding.
This article demonstrates how to build the simplest blockchain with Node.js in roughly 200 lines of code. Although compact, it is fully functional; the author later expanded it into a complete virtual currency called Naivecoin using Node.js. Readers interested in a hands‑on example can consult the original article for a detailed walkthrough and try running the code themselves.
GitHub link: https://lhartikk.github.io
Signed-in readers can open the original source through BestHub's protected redirect.
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