The time line from Jimmy Song's article https://medium.com/@jimmysong/uasf-segwit2x-scenarios-and-timelines-1a540336c4be
is still applicable and clearly set out.
To summarize, the scenario here looks like this:
2017 July 19 02:00 GMT — BIP91 epoch begins
2017 July 21 10:00 GMT — BIP91 epoch closes with >80% signaling and BIP91 locks-in
2017 July 23 18:00 GMT — BIP91 epoch finishes, BIP91 is activated
2017 July 23 18:00 GMT onward — Every block signals BIP141 (Segwit)
2017 July 27 or thereabouts — New Difficulty Adjustment Period Begins (2016 blocks). Every block will be signaling for Segwit.
2017 August 1 00:00 GMT — BIP148 starts, but does nothing since every block is signaling BIP141 due to BIP91.
2017 August 10 or thereabouts — Difficulty Adjustment Period closes with >95% signaling and BIP141 locks-in.
2017 August 23 or thereabouts — Difficulty Adjustment Period closes and BIP141 (Segwit) is active.
2017 November 18 or thereabouts — 2x Hard Fork (scheduled)
The BIP141(segwit) lock-in progress can be tracked using
https://www.xbt.eu/
After locking there is a grace period of one 2016 blocks (one difficulty adjustment period) for nodes to upgrade.
If B-CASH (BCC/BCH/Bitcoin Cash) takes away hash rate then the timeline might stretch out a little.
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