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consensus/ethash: implement EIP-3554 (bomb delay) #22840

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Merged
karalabe merged 1 commit into from
May 12, 2021
+7 −0
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consensus/ethash: implement EIP-3554 (bomb delay) #22840

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7 changes: 7 additions & 0 deletions consensus/ethash/consensus.go
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Original file line number Diff line number Diff line change
Expand Up @@ -45,6 +45,11 @@ var (
maxUncles = 2 // Maximum number of uncles allowed in a single block
allowedFutureBlockTimeSeconds = int64(15) // Max seconds from current time allowed for blocks, before they're considered future blocks

// calcDifficultyEip3554 is the difficulty adjustment algorithm as specified by EIP 3554.
// It offsets the bomb a total of 9.5M blocks.
// Specification EIP-3554: https://eips.ethereum.org/EIPS/eip-3554
calcDifficultyEip3554 = makeDifficultyCalculator(big.NewInt(9500000))

// calcDifficultyEip2384 is the difficulty adjustment algorithm as specified by EIP 2384.
// It offsets the bomb 4M blocks from Constantinople, so in total 9M blocks.
// Specification EIP-2384: https://eips.ethereum.org/EIPS/eip-2384
Expand Down Expand Up @@ -325,6 +330,8 @@ func CalcDifficulty(config *params.ChainConfig, time uint64, parent *types.Heade
switch {
case config.IsCatalyst(next):
return big.NewInt(1)
case config.IsLondon(next):
return calcDifficultyEip3554(time, parent)
case config.IsMuirGlacier(next):
return calcDifficultyEip2384(time, parent)
case config.IsConstantinople(next):
Expand Down