BIP 325: update signet genesis block #1000

pull ajtowns wants to merge 1 commits into bitcoin:master from ajtowns:202009-signet-genesis changing 1 files +5 −4

ajtowns commented at 6:13 AM on September 21, 2020: contributor

Updates the signet genesis block with higher difficulty and a later timestamp, matching bitcoin/bitcoin#18267 . The new difficulty is the lowest possible such that the target multiplied by two weeks multiplied by 4 (see bitcoind's CalculateNextWorkRequired() function) doesn't overflow a uint256.
bip-0325: update signet genesis block 9b0c3d0e6a
ajtowns cross-referenced this on Sep 21, 2020 from issue BIP-325: Signet [consensus] by kallewoof

in bip-0325.mediawiki:85 in 9b0c3d0e6a

  84 | +* Nonce: 52613770
  85 | +* Difficulty: 0x1e0377ae
  86 | +* Version: 1
  87 |  
  88 | -The resulting genesis block hash is 0000032d7f67af9ec7b7152aea0fe7c95b9804ff973265e252f245e0ae61799d, and the block hex is 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.
  89 | +The resulting genesis block hash is 00000008819873e925422c1ff0f99f7cc9bbb232af63a077a480a3633bee1ef6, and the block hex is 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.

jonatack commented at 7:57 AM on September 21, 2020:

Checked that these updated values match those in https://github.com/bitcoin/bitcoin/pull/18267/commits/e8990f1 that I have reviewed and manually tested.

jonatack commented at 7:59 AM on September 21, 2020: contributor

Did not verify the CalculateNextWorkRequired calculation but otherwise LGTM.
Yuthana826 commented at 8:10 AM on September 21, 2020: none

#1000
kallewoof commented at 9:45 AM on September 21, 2020: member

ACK, thanks. Please merge @luke-jr.
dr-orlovsky approved
dr-orlovsky commented at 11:14 AM on September 21, 2020: contributor
tACK: I confirm that this matches code used in real environment with
- https://github.com/bitcoin/bitcoin/pull/18267#pullrequestreview-491730396
- https://github.com/ElementsProject/lightning/pull/4068
- https://github.com/rust-bitcoin/rust-bitcoin/pull/291
- https://github.com/LNP-BP/docker/blob/master/docker-compose/signet/docker-compose.yml, build of those branches. It works well on my notebook and company server, and bitcoin core, c-lightning and electrs are working in sync.
ajtowns cross-referenced this on Sep 22, 2020 from issue refactor: Signet fixups by MarcoFalke
Sjors commented at 2:54 PM on September 23, 2020: member
Maybe update the reference section with more recent mailinglist thread:
- https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2020-August/018145.html (which points to other resources as well)
luke-jr merged this on Oct 5, 2020
luke-jr closed this on Oct 5, 2020

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