📅 Original date posted:2019-07-31
📝 Original message:Hi all,
I would like to propose that a "moving checkpoint" is added to the Bitcoin protocol. It's a very simple rule already implemented in NXT coin:
- A node will ignore any new block under nodeBlockHeight - N, so the blockchain becomes truly immutable after N blocks, even during a 51% attack which thanks to the moving checkpoint can't rewrite history older than the last N blocks.
NXT coin has a N value of 720 blocks, like 12 hours of blocks.
To be more conservative, Bitcoin could have a N value of 144 blocks (like 24 hours). So users and exchanges could plan their operations with big amounts of BTC knowing that only after 24 hours a transaction is truly immutable.
Maybe a 51% attack never happens but if it does it would be nice to be 100% sure that history rewrite is limited to only 24 hours.
Regards,
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Kenshiro [] [ARCHIVE] /
npub1pn…9cs5z
2023-06-07 18:19:47
in reply to nevent1q…kzhh
Author Public Key
npub1pnn79vddxfx38glw3fa3cslhnw5vmfjaq80mchjaxrdwef7r5kvqz9cs5zPublished at
2023-06-07 18:19:47Event JSON
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"content": "📅 Original date posted:2019-07-31\n📝 Original message:Hi all,\n\nI would like to propose that a \"moving checkpoint\" is added to the Bitcoin protocol. It's a very simple rule already implemented in NXT coin:\n\n- A node will ignore any new block under nodeBlockHeight - N, so the blockchain becomes truly immutable after N blocks, even during a 51% attack which thanks to the moving checkpoint can't rewrite history older than the last N blocks.\n\nNXT coin has a N value of 720 blocks, like 12 hours of blocks.\n\nTo be more conservative, Bitcoin could have a N value of 144 blocks (like 24 hours). So users and exchanges could plan their operations with big amounts of BTC knowing that only after 24 hours a transaction is truly immutable.\n\nMaybe a 51% attack never happens but if it does it would be nice to be 100% sure that history rewrite is limited to only 24 hours.\n\nRegards,\n-------------- next part --------------\nAn HTML attachment was scrubbed...\nURL: \u003chttp://lists.linuxfoundation.org/pipermail/bitcoin-dev/attachments/20190731/15e4161f/attachment.html\u003e",
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