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Zawy6 targetMA and exponential

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jl777
2019-08-02 21:35:22 -11:00
parent 3cf10af4ee
commit 4e7be62336
1 changed files with 74 additions and 10 deletions
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84
src/pow.cpp
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@@ -42,6 +42,33 @@ uint32_t komodo_chainactive_timestamp();
unsigned int lwmaGetNextWorkRequired(const CBlockIndex* pindexLast, const CBlockHeader *pblock, const Consensus::Params& params);
unsigned int lwmaCalculateNextWorkRequired(const CBlockIndex* pindexLast, const Consensus::Params& params);
arith_uint256 zawy_targetMA(arith_uint256 easy,arith_uint256 bnTarget,int32_t divisor)
{
bnTarget /= arith_uint256(divisor);
bnTarget *= arith_uint256(ASSETCHAINS_BLOCKTIME);
if ( bnTarget > easy )
bnTarget = easy;
return(bnTarget);
}
arith_uint256 zawy_exponential(arith_uint256 bnTarget,int32_t mult)
{
int32_t i,n,modval; int64_t A = 1, B = 3600 * 100;
if ( (n= (mult/ASSETCHAINS_BLOCKTIME)) > 0 )
{
for (i=1; i<=n; i++)
A *= 3;
}
if ( (modval= (mult % ASSETCHAINS_BLOCKTIME)) != 0 )
{
B += (3600 * 110 * modval) / ASSETCHAINS_BLOCKTIME;
B += (3600 * 60 * modval * modval) / (ASSETCHAINS_BLOCKTIME * ASSETCHAINS_BLOCKTIME);
}
bnTarget /= arith_uint256(100 * 3600);
bnTarget *= arith_uint256(A * B);
return(bnTarget);
}
unsigned int GetNextWorkRequired(const CBlockIndex* pindexLast, const CBlockHeader *pblock, const Consensus::Params& params)
{
if (ASSETCHAINS_ALGO != ASSETCHAINS_EQUIHASH && ASSETCHAINS_STAKED == 0)
@@ -73,8 +100,8 @@ unsigned int GetNextWorkRequired(const CBlockIndex* pindexLast, const CBlockHead
// Find the first block in the averaging interval
const CBlockIndex* pindexFirst = pindexLast;
arith_uint256 bnTarget,bnTot {0};
uint32_t nbits,blocktime,maxdiff=0,block4diff=0; int32_t diff,mult = 0;
arith_uint256 bnTmp,bnTarget,bnSum4 {0},bnSum7 {0},bnSum12 {0},bnTot {0};
uint32_t nbits,blocktime,maxdiff=0,block4diff=0,block7diff=0,block12diff=0; int32_t diff,mult = 0;
if ( ASSETCHAINS_ADAPTIVEPOW > 0 && pindexFirst != 0 && pblock != 0 )
{
mult = pblock->nTime - pindexFirst->nTime - 7 * ASSETCHAINS_BLOCKTIME;
@@ -82,7 +109,6 @@ unsigned int GetNextWorkRequired(const CBlockIndex* pindexLast, const CBlockHead
}
for (int i = 0; pindexFirst && i < params.nPowAveragingWindow; i++)
{
arith_uint256 bnTmp;
bnTmp.SetCompact(pindexFirst->nBits);
bnTot += bnTmp;
if ( ASSETCHAINS_ADAPTIVEPOW > 0 && pblock != 0 )
@@ -94,12 +120,21 @@ unsigned int GetNextWorkRequired(const CBlockIndex* pindexLast, const CBlockHead
{
if ( i == 3 )
block4diff = diff;
else if ( i == 6 )
block7diff = diff;
else if ( i == 11 )
block12diff = diff;
diff -= (8+i)*ASSETCHAINS_BLOCKTIME;
if ( diff > mult )
{
//fprintf(stderr,"i.%d diff.%d (%u - %u - %dx)\n",i,(int32_t)diff,pblock->nTime,pindexFirst->nTime,(8+i));
mult = diff;
}
if ( i < 4 )
bnSum4 += bnTmp;
if ( i < 7 )
bnSum7 += bnTmp;
bnSum12 += bnTmp;
} else maxdiff = diff;
}
pindexFirst = pindexFirst->pprev;
@@ -111,13 +146,13 @@ unsigned int GetNextWorkRequired(const CBlockIndex* pindexLast, const CBlockHead
bool fNegative,fOverflow; arith_uint256 easy,origtarget,bnAvg {bnTot / params.nPowAveragingWindow};
nbits = CalculateNextWorkRequired(bnAvg, pindexLast->GetMedianTimePast(), pindexFirst->GetMedianTimePast(), params);
if ( ASSETCHAINS_ADAPTIVEPOW > 0 ) // jl777: test of mult > 1 failed when it was int64_t???
if ( ASSETCHAINS_ADAPTIVEPOW > 0 )
{
origtarget = bnTarget = arith_uint256().SetCompact(nbits);
if ( mult > 1 )
{
bnTarget = bnTarget * arith_uint256(mult * mult);
easy.SetCompact(KOMODO_MINDIFF_NBITS,&fNegative,&fOverflow);
if ( mult > 1 ) // chain is stuck case, jl777: test of mult > 1 failed when it was int64_t???
{
bnTarget = zawy_exponential(bnTarget,mult); //replaces: bnTarget * arith_uint256(mult * mult);
if ( bnTarget < origtarget || bnTarget > easy )
{
bnTarget = easy;
@@ -125,15 +160,44 @@ unsigned int GetNextWorkRequired(const CBlockIndex* pindexLast, const CBlockHead
return(KOMODO_MINDIFF_NBITS);
} else fprintf(stderr,"cmp.%d mult.%d for ht.%d\n",mult>1,(int32_t)mult,(int32_t)pindexLast->GetHeight());
}
else
else if ( block12diff != 0 && block7diff != 0 && block4diff != 0 )
{
if ( block4diff > 4 && block4diff < ASSETCHAINS_BLOCKTIME ) // for 10x and higher hashrate increases
bnSum4 = zawy_targetMA(easy,bnSum4,block4diff * 5);
bnSum7 = zawy_targetMA(easy,bnSum7,block7diff * 3);
bnSum12 = zawy_targetMA(easy,bnSum12,block12diff * 2);
if ( block12diff < ASSETCHAINS_BLOCKTIME*11 )
{
if ( bnSum4 < bnSum7 )
bnTmp = bnSum4;
else bnTmp = bnSum7;
if ( bnSum12 < bnTmp )
bnTmp = bnSum12;
if ( bnTmp < bnTarget )
{
fprintf(stderr,"ht.%d block12diff %d < %d, make harder\n",(int32_t)pindexLast->GetHeight()+1,block12diff,ASSETCHAINS_BLOCKTIME*11);
bnTarget = bnTmp;
}
}
else if ( block12diff > ASSETCHAINS_BLOCKTIME*13 )
{
if ( bnSum4 > bnSum7 )
bnTmp = bnSum4;
else bnTmp = bnSum7;
if ( bnSum12 > bnTmp )
bnTmp = bnSum12;
if ( bnTmp > bnTarget )
{
fprintf(stderr,"ht.%d block12diff %d > %d, make easier\n",(int32_t)pindexLast->GetHeight()+1,block12diff,ASSETCHAINS_BLOCKTIME*13);
bnTarget = bnTmp;
}
}
/*if ( block4diff > 4 && block4diff < ASSETCHAINS_BLOCKTIME ) // for 10x and higher hashrate increases
{
block4diff += (2 * ASSETCHAINS_BLOCKTIME) / 3;
bnTarget = bnTarget * arith_uint256(block4diff) / arith_uint256(ASSETCHAINS_BLOCKTIME * 2);
fprintf(stderr,"ht.%d 4 blocks happened in %d adjust by %.4f\n",(int32_t)pindexLast->GetHeight(),block4diff-((2 * ASSETCHAINS_BLOCKTIME) / 3),(double)block4diff/(ASSETCHAINS_BLOCKTIME*2));
}
/*if ( maxdiff < 13*ASSETCHAINS_BLOCKTIME ) // for miners trying to avoid the 10x trigger
if ( maxdiff < 13*ASSETCHAINS_BLOCKTIME ) // for miners trying to avoid the 10x trigger
{
bnTarget = bnTarget * arith_uint256(3) / arith_uint256(4); // way too strong
fprintf(stderr,"17 blocks happened in %d < 13x %d\n",maxdiff,13*ASSETCHAINS_BLOCKTIME);