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fix fPowAllowMinDifficultyBlocks to work on the testnet

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kay kurokawa 2018-05-21 15:46:10 -04:00
parent 7930840005
commit fe493bff9e
1 changed files with 8 additions and 19 deletions
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19
src/pow.cpp
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@ -14,32 +14,21 @@
unsigned int GetNextWorkRequired(const CBlockIndex* pindexLast, const CBlockHeader *pblock, const Consensus::Params& params) unsigned int GetNextWorkRequired(const CBlockIndex* pindexLast, const CBlockHeader *pblock, const Consensus::Params& params)
{ {
unsigned int nProofOfWorkLimit = UintToArith256(params.powLimit).GetCompact(); unsigned int nProofOfWorkLimit = UintToArith256(params.powLimit).GetCompact();
// Genesis block // Genesis block
if (pindexLast == NULL) if (pindexLast == NULL)
return nProofOfWorkLimit; return nProofOfWorkLimit;
// Only change once per difficulty adjustment interval
if ((pindexLast->nHeight+1) % params.DifficultyAdjustmentInterval() != 0)
{
if (params.fPowAllowMinDifficultyBlocks) if (params.fPowAllowMinDifficultyBlocks)
{ {
// Special difficulty rule for testnet: // Special difficulty rule for testnet:
// If the new block's timestamp is more than 2* 10 minutes // If the new block's timestamp is twice the target block time
// then allow mining of a min-difficulty block. // then allow mining of a min-difficulty block.
if (pblock->GetBlockTime() > pindexLast->GetBlockTime() + params.nPowTargetSpacing*2) // This is to prevent the testnet from gettig stuck when a large amount
// of hashrate drops off the network.
if (pblock->GetBlockTime() > pindexLast->GetBlockTime() + params.nPowTargetSpacing*2){
return nProofOfWorkLimit; return nProofOfWorkLimit;
else
{
// Return the last non-special-min-difficulty-rules-block
const CBlockIndex* pindex = pindexLast;
while (pindex->pprev && pindex->nHeight % params.DifficultyAdjustmentInterval() != 0 && pindex->nBits == nProofOfWorkLimit)
pindex = pindex->pprev;
return pindex->nBits;
} }
} }
return pindexLast->nBits;
}
// Go back the full period unless it's the first retarget after genesis. // Go back the full period unless it's the first retarget after genesis.
int blockstogoback = params.DifficultyAdjustmentInterval()-1; int blockstogoback = params.DifficultyAdjustmentInterval()-1;