Bitcoin Scaling Watch: News & Guides to Navigate the Coming Clash of Code - CoinDesk
User-activated soft fork (UASF)
User-activated hard fork (UAHF)
July 18-21, 2-17: BIP91 / BI141
August 1, 2017: BIP148
August 1, 2017 -12 hours 20 minutes after BIP148: Bitmain UAHF
How Bitcoin Could Tear Itself Apart
User-activated soft fork (UASF)
User-activated hard fork (UAHF)
July 18-21, 2-17: BIP91 / BI141
August 1, 2017: BIP148
August 1, 2017 -12 hours 20 minutes after BIP148: Bitmain UAHF
How Bitcoin Could Tear Itself Apart
- By July 21: SegWit2x software is released and supporters begin using it.
- July 21 to July 31: The community monitors how many miners deploy SegWit2x:
- If more than 80 percent deploy it consistently, that should signal community-wide adoption of SegWit and the avoidance of a split, at least for now.
- But if a majority do not deploy, expect anxiety within the community to grow as the focus shifts to the Aug. 1 deadline.
- Aug. 1: UASF is deployed by its supporters, who begin checking if bitcoin transactions are compliant with SegWit.
- If a majority of miners still do not deploy SegWit2x or otherwise accept SegWit, and if UASF supporters do not back down, then two versions of bitcoin’s blockchain could come into existence: a UASF-backed one where only SegWit transactions are recognized, and another where all trades -- SegWit and non-SegWit -- are recognized.
- If a split occurs, bitcoin will likely begin existing on both blockchains in parallel, resulting in two versions of the cryptocurrency. Expect traders to quickly re-price the value of both, likely leading to massive volatility.
- Aug. 1: Bitmain "contigency plan" UAHF


