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testnet: Add Testnet4 difficulty adjustment rules fix

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This commit is contained in:
Fabian Jahr
2024-05-03 10:05:22 +09:00
parent 74a04f9e7a
commit 0100907ca1
1 changed files with 13 additions and 1 deletions
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14
src/pow.cpp
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@@ -61,7 +61,19 @@ unsigned int CalculateNextWorkRequired(const CBlockIndex* pindexLast, int64_t nF
// Retarget
const arith_uint256 bnPowLimit = UintToArith256(params.powLimit);
arith_uint256 bnNew;
bnNew.SetCompact(pindexLast->nBits);
// Special difficulty rule for Testnet4
if (params.enforce_BIP94) {
// Here we use the first block of the difficulty period. This way
// the real difficulty is always preserved in the first block as
// it is not allowed to use the min-difficulty exception.
int nHeightFirst = pindexLast->nHeight - (params.DifficultyAdjustmentInterval()-1);
const CBlockIndex* pindexFirst = pindexLast->GetAncestor(nHeightFirst);
bnNew.SetCompact(pindexFirst->nBits);
} else {
bnNew.SetCompact(pindexLast->nBits);
}
bnNew *= nActualTimespan;
bnNew /= params.nPowTargetTimespan;