Building Sparrow — notes from writing a small Proof-of-Work blockchain in 2026
Dev.toMay 8, 2026
cryptocurrencyproof-of-workblockchaindecentralizationmining
The article discusses the creation of Sparrow, a Proof-of-Work cryptocurrency designed to embody the original principles of blockchain technology. Unlike many contemporary projects that focus on high-FDV token launches or forks, Sparrow features a CPU-mineable architecture and a Bitcoin-style UTXO ledger, emphasizing decentralization and simplicity. The author reflects on the design choices made during development and shares insights on what could be improved in future iterations.