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Update adaptivepow to handle variable block times

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This commit is contained in:
jl777
2019-07-29 21:25:49 -11:00
parent b55da04025
commit 02e6851870
4 changed files with 27 additions and 31 deletions
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23
src/komodo_bitcoind.h
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@@ -1416,6 +1416,29 @@ uint32_t komodo_stakehash(uint256 *hashp,char *address,uint8_t *hashbuf,uint256
return(addrhash.uints[0]);
}
arith_uint256 komodo_adaptivepow_target(int32_t height,arith_uint256 bnTarget,uint32_t nTime)
{
arith_uint256 origtarget,easy; int32_t diff,mult; bool fNegative,fOverflow; CBlockIndex *tipindex;
if ( height > 10 && (tipindex= komodo_chainactive(height - 1)) != 0 )
{
diff = (nTime - tipindex->GetMedianTimePast());
if ( diff > 20 * ASSETCHAINS_BLOCKTIME )
{
mult = diff - 19 * ASSETCHAINS_BLOCKTIME;
mult = (mult / ASSETCHAINS_BLOCKTIME) * ASSETCHAINS_BLOCKTIME + ASSETCHAINS_BLOCKTIME / 3;
origtarget = bnTarget;
bnTarget = bnTarget * arith_uint256(mult * mult);
easy.SetCompact(KOMODO_MINDIFF_NBITS,&fNegative,&fOverflow);
if ( bnTarget < origtarget || bnTarget > easy ) // deal with overflow
{
bnTarget = easy;
fprintf(stderr,"miner overflowed, set to mindiff\n");
} else fprintf(stderr,"miner elapsed %d, adjust by factor of %d\n",diff,mult);
}
}
return(bnTarget);
}
arith_uint256 komodo_PoWtarget(int32_t *percPoSp,arith_uint256 target,int32_t height,int32_t goalperc)
{
int32_t oldflag = 0,dispflag = 0;

1
src/komodo_defs.h
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@@ -337,6 +337,7 @@ int32_t komodo_priceget(int64_t *buf64,int32_t ind,int32_t height,int32_t numblo
uint64_t komodo_accrued_interest(int32_t *txheightp,uint32_t *locktimep,uint256 hash,int32_t n,int32_t checkheight,uint64_t checkvalue,int32_t tipheight);
int32_t komodo_currentheight();
int32_t komodo_notarized_bracket(struct notarized_checkpoint *nps[2],int32_t height);
arith_uint256 komodo_adaptivepow_target(int32_t height,arith_uint256 bnTarget,uint32_t nTime);
uint256 Parseuint256(const char *hexstr);

18
src/miner.cpp
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@@ -1448,22 +1448,8 @@ void static BitcoinMiner_noeq()
LogPrintf("Block %d : PoS %d%% vs target %d%%\n", Mining_height, percPoS, (int32_t)ASSETCHAINS_STAKED);
}
else if ( ASSETCHAINS_ADAPTIVEPOW != 0 && ASSETCHAINS_STAKED == 0 )
{
arith_uint256 origtarget; bool fNegative,fOverflow;
uint32_t elapsed = (pblock->nTime - komodo_heightstamp(Mining_height-1));
if ( elapsed > 777 )
{
elapsed -= 777;
origtarget = HASHTarget;
HASHTarget_POW = HASHTarget * arith_uint256(elapsed * elapsed);
if ( HASHTarget_POW < origtarget ) // deal with underflow
{
HASHTarget_POW.SetCompact(KOMODO_MINDIFF_NBITS,&fNegative,&fOverflow);
fprintf(stderr,"miner underflowed, set to mindiff\n");
} else fprintf(stderr,"miner elapsed %d, adjust by factor of %d\n",elapsed+777,elapsed*elapsed);
}
}
HASHTarget_POW = komodo_adaptivepow_target(height,HASHTarget,pblock->nTime);
while (true)
{
arith_uint256 arNonce = UintToArith256(pblock->nNonce);

16
src/pow.cpp
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@@ -454,21 +454,7 @@ bool CheckProofOfWork(const CBlockHeader &blkHeader, uint8_t *pubkey33, int32_t
bnTarget.SetCompact(KOMODO_MINDIFF_NBITS,&fNegative,&fOverflow);
}
else if ( ASSETCHAINS_ADAPTIVEPOW != 0 && ASSETCHAINS_STAKED == 0 )
{
arith_uint256 origtarget;
uint32_t elapsed = (blkHeader.nTime - komodo_heightstamp(height-1));
if ( elapsed > 777 )
{
elapsed -= 777;
origtarget = bnTarget;
bnTarget = bnTarget * arith_uint256(elapsed * elapsed);
if ( bnTarget < origtarget ) // deal with underflow
{
bnTarget.SetCompact(KOMODO_MINDIFF_NBITS,&fNegative,&fOverflow);
fprintf(stderr,"underflowed, set to mindiff\n");
} else fprintf(stderr,"elapsed %d, adjust by factor of %d\n",elapsed+777,elapsed*elapsed);
}
}
bnTarget = komodo_adaptivepow_target(height,bnTarget,blkHeader.nTime);
// Check proof of work matches claimed amount
if ( UintToArith256(hash = blkHeader.GetHash()) > bnTarget && !blkHeader.IsVerusPOSBlock() )
{