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Merge pull request #6853

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7801f43 Added fPowNoRetargeting field to Consensus::Params that disables nBits recalculation. (Eric Lombrozo)
This commit is contained in:
Wladimir J. van der Laan 2015-10-20 12:07:06 +02:00
commit c834f56869
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GPG Key ID: 74810B012346C9A6
3 changed files with 7 additions and 0 deletions
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3
src/chainparams.cpp
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@ -76,6 +76,7 @@ public:
consensus.nPowTargetTimespan = 14 * 24 * 60 * 60; // two weeks
consensus.nPowTargetSpacing = 10 * 60;
consensus.fPowAllowMinDifficultyBlocks = false;
consensus.fPowNoRetargeting = false;
/**
* The message start string is designed to be unlikely to occur in normal data.
* The characters are rarely used upper ASCII, not valid as UTF-8, and produce
@ -155,6 +156,7 @@ public:
consensus.nPowTargetTimespan = 14 * 24 * 60 * 60; // two weeks
consensus.nPowTargetSpacing = 10 * 60;
consensus.fPowAllowMinDifficultyBlocks = true;
consensus.fPowNoRetargeting = false;
pchMessageStart[0] = 0x0b;
pchMessageStart[1] = 0x11;
pchMessageStart[2] = 0x09;
@ -217,6 +219,7 @@ public:
consensus.nPowTargetTimespan = 14 * 24 * 60 * 60; // two weeks
consensus.nPowTargetSpacing = 10 * 60;
consensus.fPowAllowMinDifficultyBlocks = true;
consensus.fPowNoRetargeting = true;
pchMessageStart[0] = 0xfa;
pchMessageStart[1] = 0xbf;

1
src/consensus/params.h
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@ -22,6 +22,7 @@ struct Params {
/** Proof of work parameters */
uint256 powLimit;
bool fPowAllowMinDifficultyBlocks;
bool fPowNoRetargeting;
int64_t nPowTargetSpacing;
int64_t nPowTargetTimespan;
int64_t DifficultyAdjustmentInterval() const { return nPowTargetTimespan / nPowTargetSpacing; }

3
src/pow.cpp
View File

@ -52,6 +52,9 @@ unsigned int GetNextWorkRequired(const CBlockIndex* pindexLast, const CBlockHead
unsigned int CalculateNextWorkRequired(const CBlockIndex* pindexLast, int64_t nFirstBlockTime, const Consensus::Params& params)
{
if (params.fPowNoRetargeting)
return pindexLast->nBits;
// Limit adjustment step
int64_t nActualTimespan = pindexLast->GetBlockTime() - nFirstBlockTime;
LogPrintf(" nActualTimespan = %d before bounds\n", nActualTimespan);