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jl777
2019-08-07 19:11:28 -11:00
parent 336929d6c1
commit 3079765c7c
1 changed files with 30 additions and 20 deletions
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50
src/pow.cpp
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@@ -289,6 +289,32 @@ arith_uint256 zawy_ctBinv(arith_uint256 bnTarget,uint32_t solvetime)
return(bnTarget); return(bnTarget);
} }
arith_uint256 zawy_TSA_EMA(int32_t height,int32_t tipdiff,arith_uint256 prevTarget,int32_t solvetime)
{
arith_uint256 A,B,C,bnTarget;
if ( tipdiff < 4 )
tipdiff = 4;
tipdiff &= ~1;
bnTarget = prevTarget / arith_uint256(K*T);
A = bnTarget * arith_uint256(T);
B = (bnTarget / arith_uint256(360000)) * arith_uint256(tipdiff * zawy_exponential_val360000(tipdiff/2));
C = (bnTarget / arith_uint256(360000)) * arith_uint256(T * zawy_exponential_val360000(tipdiff/2));
bnTarget = ((A + B - C) / arith_uint256(tipdiff)) * arith_uint256(K*T);
if ( 0 )
{
if ( solvetime < T/2 )
bnTarget = (bnTarget * arith_uint256(2)) / arith_uint256(3);
else if ( solvetime > T*2 )
bnTarget = (bnTarget * arith_uint256(3)) / arith_uint256(2);
}
{
int32_t z;
for (z=31; z>=0; z--)
fprintf(stderr,"%02x",((uint8_t *)&bnTarget)[z]);
}
fprintf(stderr," ht.%d TSA bnTarget tipdiff.%d\n",height,tipdiff);
return(bnTarget);
}
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)
{ {
@@ -348,26 +374,7 @@ unsigned int GetNextWorkRequired(const CBlockIndex* pindexLast, const CBlockHead
} }
if ( ASSETCHAINS_ADAPTIVEPOW == 2 ) // TSA if ( ASSETCHAINS_ADAPTIVEPOW == 2 ) // TSA
{ {
arith_uint256 A,B,C; bnTarget = zawy_TSA_EMA(height,tipdiff,ct[0],ts[0] - ts[1]);
if ( tipdiff < 4 )
tipdiff = 4;
tipdiff &= ~1;
bnTarget = ct[0] / arith_uint256(K*T);
A = bnTarget * arith_uint256(T);
B = (bnTarget / arith_uint256(360000)) * arith_uint256(tipdiff * zawy_exponential_val360000(tipdiff/2));
C = (bnTarget / arith_uint256(360000)) * arith_uint256(T * zawy_exponential_val360000(tipdiff/2));
bnTarget = ((A + B - C) / arith_uint256(tipdiff)) * arith_uint256(K*T);
if ( (ts[0] - ts[1]) < T/2 )
bnTarget = (bnTarget * arith_uint256(2)) / arith_uint256(3);
else if ( (ts[0] - ts[1]) > T*2 )
bnTarget = (bnTarget * arith_uint256(3)) / arith_uint256(2);
bnTarget = (bnTarget + ct[0]) / arith_uint256(2);
{
int32_t z;
for (z=31; z>=0; z--)
fprintf(stderr,"%02x",((uint8_t *)&bnTarget)[z]);
}
fprintf(stderr," ht.%d TSA bnTarget tipdiff.%d\n",height,tipdiff);
nbits = bnTarget.GetCompact(); nbits = bnTarget.GetCompact();
nbits = (nbits & 0xfffffffc) | 0; nbits = (nbits & 0xfffffffc) | 0;
return(nbits); return(nbits);
@@ -470,6 +477,9 @@ unsigned int GetNextWorkRequired(const CBlockIndex* pindexLast, const CBlockHead
fprintf(stderr," cmp.%d mult.%d for ht.%d\n",mult>1,(int32_t)mult,height); fprintf(stderr," cmp.%d mult.%d for ht.%d\n",mult>1,(int32_t)mult,height);
} }
} }
if ( zawyflag == 0 && mult <= 1 )
bnTarget = zawy_TSA_EMA(height,tipdiff,bnTarget,ts[0] - ts[1]);
nbits = bnTarget.GetCompact(); nbits = bnTarget.GetCompact();
nbits = (nbits & 0xfffffffc) | zawyflag; nbits = (nbits & 0xfffffffc) | zawyflag;
} }