Episode Details

This story was originally published on HackerNoon at: https://hackernoon.com/a-miner-just-built-its-own-bitcoin-block-inside-gominings-stratum-v2-first.
GoMining mined the first known Stratum V2 product block via DMND, declaring its own template with GoBTC Pay transactions. Why miner-built blocks matter.
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GoMining mined the first known Bitcoin block produced end to end on Stratum V2, using the DMND pool's Job Declaration functionality to construct and declare its own block template rather than accept one from a pool. The block carried transactions from GoBTC Pay, GoMining's open Bitcoin payments protocol, which makes this the first time the new architecture has been used to power a live product. It matters because of a structural problem: under the legacy Stratum V1 protocol, the pool operator, not the miner, picks every transaction in a block, and just two pools direct roughly half of all blocks. Stratum V2's Job Declaration sub-protocol moves template construction to the miner while keeping the economics of pooled mining intact, alongside encryption and large bandwidth savings. The milestone is real but early: it changes who selects transactions, not who holds the hashpower, and broad impact depends on the large pools actually enabling the feature for their miners. What did GoMining do? GoMining mined the first known Bitcoin block created end to end using the Stratum V2 protocol, via the DMND mining pool. Using Stratum V2's Job Declaration functionality, GoMining built and declared its own block template instead of relying on a pool to choose the transactions, and included transactions from its GoBTC Pay payments protocol. Why does it matter? Under Stratum V1, the protocol most pools still run, the pool operator selects and orders every transaction in a block, while the miner only contributes hashpower. With two pools, Foundry USA and AntPool, directing roughly half of all Bitcoin blocks, that means a small number of operators effectively decide what gets confirmed. Stratum V2 returns template construction to the individual miner. What is Stratum V2? An open mining protocol, with a working group founded in 2022 by Braiins and Spiral, that adds end-to-end encryption, cuts mining bandwidth substantially, and introduces a Job Declaration sub-protocol letting miners build their own block templates while still mining in a pool. Who are the players? GoMining is a Bitcoin ecosystem serving five million users and ranked among the top ten miners by hashrate, with tokenized hashrate and the GoBTC Pay payments protocol. DMND is a mining pool built around Stratum V2 and miner-controlled block creation.