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* Include LICENCE in the Jekyll build * Replace old licence link with new and improved licence link * Add note to EIP-1 mandating the new link * Maybe this fixes it? * Rename LICENCE so that jekyll picks it up * Add original LICENCE file back * Delete the markdown file * Add Jekyll header Hopefully the tooling still detects it as CC0 * Remove Jekyll header * Maybe this will trick Jekyll and satisfy github? * Remove config changes * Enable incremental build * Will it work if I rename it? * I'll just paste the content of the licence into the file... * Perhaps this will work * Replace the licence file * Fix false positive Co-authored-by: Micah Zoltu <micah@zoltu.net> * Resolve feedback * Perhaps this might work * It didn't work This reverts commit 55116e15168fb20ae57dea97388bb260c0941465. * Will licencee still detect this correctly? * Jekyll Preamble in licence file * Include it? * Licence -> License, get rid of CC0.md * Force wording of copyright waiver * Formatting consistent with the rest of the list * Spelling * Escape * Task failed successfully * Fix two more links * Will this render it? * Perhaps this will work too * .md essential * Fix the issues Micah noted Co-authored-by: Micah Zoltu <micah@zoltu.net>
2.6 KiB
| eip | title | author | discussions-to | status | type | category | created |
|---|---|---|---|---|---|---|---|
| 3554 | Difficulty Bomb Delay to December 2021 | James Hancock (@madeoftin) | https://ethereum-magicians.org/t/eip-3554-ice-age-delay-targeting-december-2021/6188 | Final | Standards Track | Core | 2021-05-06 |
Simple Summary
Delays the difficulty bomb to show effect the first week of December 2021.
Abstract
Starting with FORK_BLOCK_NUMBER the client will calculate the difficulty based on a fake block number suggesting to the client that the difficulty bomb is adjusting 9,700,000 blocks later than the actual block number.
Motivation
Targeting for the Shanghai upgrade and/or the Merge to occur before December 2021. Either the bomb can be readjusted at that time, or removed all together.
Specification
Relax Difficulty with Fake Block Number
For the purposes of calc_difficulty, simply replace the use of block.number, as used in the exponential ice age component, with the formula:
fake_block_number = max(0, block.number - 9_700_000) if block.number >= FORK_BLOCK_NUMBER else block.number
Rationale
The following script predicts a .1 second delay to blocktime the first week of december and a 1 second delay by the end of the month. This gives reason to address because the effect will be seen, but not so much urgency we don't have space to work around if needed.
def predict_diff_bomb_effect(current_blknum, current_difficulty, block_adjustment, months):
'''
Predicts the effect on block time (as a ratio) in a specified amount of months in the future.
Vars used in last prediction:
current_blknum = 12382958
current_difficulty = 7393633000000000
block adjustment = 9700000
months = 6
'''
blocks_per_month = (86400 * 30) // 13.3
future_blknum = current_blknum + blocks_per_month * months
diff_adjustment = 2 ** ((future_blknum - block_adjustment) // 100000 - 2)
diff_adjust_coeff = diff_adjustment / current_difficulty * 2048
return diff_adjust_coeff
diff_adjust_coeff = predict_diff_bomb_effect(12382958,7393633000000000,9700000,6)
Backwards Compatibility
No known backward compatibility issues.
Security Considerations
Misjudging the effects of the difficulty can mean longer blocktimes than anticipated until a hardfork is released. Wild shifts in difficulty can affect this number severely. Also, gradual changes in blocktimes due to longer-term adjustments in difficulty can affect the timing of difficulty bomb epochs. This affects the usability of the network but unlikely to have security ramifications.
Copyright
Copyright and related rights waived via CC0.