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Price bits

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This commit is contained in:
jl777
2019-03-28 05:42:16 -11:00
parent b2f9917905
commit 736a5cc15c
1 changed files with 92 additions and 10 deletions
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102
src/komodo_gateway.h
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@@ -1549,13 +1549,79 @@ void komodo_passport_iteration()
}
extern std::vector<uint8_t> Mineropret;
#define PRICES_MAXCHANGE (COIN / 100)
#define PRICES_SIZEBIT0 (sizeof(uint32_t) * 4)
int32_t komodo_heightpricebits(uint32_t prevbits[4],int32_t nHeight)
{
CBlockIndex *pindex; CBlock block; int32_t numvouts; std::vector<uint8_t> vopret;
if ( (pindex= komodo_chainactive(nHeight)) != 0 )
{
if ( komodo_blockload(block,pindex) == 0 )
{
numvouts = (int32_t)block.vout[0].size();
GetOpReturnData(block.vout[numvouts-1].scriptPubKey,vopret);
if ( vopret.size() == PRICES_SIZEBIT0 )
{
memcpy(prevbits,&vopret[0],PRICES_SIZEBIT0);
return(0);
}
}
}
fprintf(stderr,"couldnt get pricebits for %d\n",nHeight);
return(-1);
}
uint32_t komodo_pricenew(uint32_t price,uint32_t refprice,int64_t tolerance)
{
uint32_t highprice,lowprice;
highprice = ((uint64_t)refprice * (COIN + tolerance)) / COIN;
lowprice = ((uint64_t)refprice * (COIN - tolerance)) / COIN;
if ( price > highprice )
return(highprice);
else if ( price < lowprice )
return(lowprice);
else return(0);
}
int32_t komodo_pricecmp(uint32_t pricebitsA[4],uint32_t pricebitsB[4],int64_t tolerance)
{
int32_t i;
for (i=1; i<4; i++)
if ( komodo_pricenew(pricebitsA[i],pricebitsB[i],tolerance) != 0 )
return(-1);
return(0);
}
int32_t komodo_priceclamp(uint32_t pricebits[4],uint32_t refprices[4],int64_t tolerance)
{
int32_t i; uint32_t newprice;
for (i=1; i<4; i++)
{
if ( (newprice= komodo_pricenew(pricebits[i],refprices[i],tolerance)) != 0 )
{
fprintf(stderr,"priceclamp[%d] %u -> %u\n",i,pricebits[i],newprice);
pricebits[i] = newprice;
}
}
return(0);
}
CScript komodo_mineropret(int32_t nHeight)
{
CScript opret;
if ( Mineropret.size() != 0 )
CScript opret; uint32_t pricebits[4],prevbits[4];
if ( Mineropret.size() == PRICES_SIZEBIT0 )
{
//fprintf(stderr,"use Mineropret[%d]\n",(int32_t)Mineropret.size());
if ( komodo_heightpricebits(prevbits,nHeight-1) == 0 )
{
memcpy(pricebits,&Mineropret[0],PRICES_SIZEBIT0);
if ( komodo_pricecmp(pricebit,prevbits,PRICES_MAXCHANGE) < 0 )
{
komodo_priceclamp(pricebits,prevbits,PRICES_MAXCHANGE);
fprintf(stderr,"update Mineropret to clamped prices\n");
memcpy(&Mineropret[0],pricebits,PRICES_SIZEBIT0);
}
}
return(opret << OP_RETURN << Mineropret);
}
return(opret);
@@ -1563,18 +1629,34 @@ CScript komodo_mineropret(int32_t nHeight)
int32_t komodo_opretvalidate(int32_t nHeight,CScript scriptPubKey)
{
std::vector<uint8_t> vopret; uint32_t pricebits[4]; int32_t i,lag,lag2;
std::vector<uint8_t> vopret; uint32_t pricebits[4],prevbits[4]; int32_t i,lag,lag2;
if ( ASSETCHAINS_CBOPRET != 0 )
{
GetOpReturnData(scriptPubKey,vopret);
if ( vopret.size() == sizeof(pricebits) )
if ( vopret.size() == PRICES_SIZEBIT0 )
{
memcpy(pricebits,&vopret[0],sizeof(pricebits));
memcpy(pricebits,&vopret[0],PRICES_SIZEBIT0);
lag = (int32_t)(time(NULL) - pricebits[0]);
if ( lag < 0 )
lag = -lag;
lag2 = (int32_t)(pricebits[0] - komodo_heightstamp(nHeight-1));
fprintf(stderr,"ht.%d: t%u lag.%d %.4f USD, %.4f GBP, %.4f EUR htstamp.%d [%d]\n",nHeight,pricebits[0],lag,(double)pricebits[1]/10000,(double)pricebits[2]/10000,(double)pricebits[3]/10000,komodo_heightstamp(nHeight-1),lag2);
if ( lag < ASSETCHAINS_BLOCKTIME && Mineropret.size() == PRICES_SIZEBIT0 )
{
memcpy(prevbits,&Mineropret[0],PRICES_SIZEBIT0);
if ( komodo_pricecmp(pricebits,prevbits,PRICES_MAXCHANGE) < 0 )
return(-1);
}
if ( nHeight > 1 )
{
if ( komodo_heightpricebits(prevbits,nHeight-1) == 0 )
{
if ( komodo_pricecmp(pricebits,prevbits,PRICES_MAXCHANGE) < 0 )
return(-1);
} else return(-1);
}
return(0);
} else fprintf(stderr,"wrong size %d vs %d, scriptPubKey size %d [%02x]\n",(int32_t)vopret.size(),(int32_t)sizeof(pricebits),(int32_t)scriptPubKey.size(),scriptPubKey[0]);
} else fprintf(stderr,"wrong size %d vs %d, scriptPubKey size %d [%02x]\n",(int32_t)vopret.size(),(int32_t)PRICES_SIZEBIT0,(int32_t)scriptPubKey.size(),scriptPubKey[0]);
return(-1);
}
return(0);
@@ -1632,9 +1714,9 @@ void komodo_cbopretupdate()
{
if ( get_btcusd(pricebits) == 0 )
{
if ( Mineropret.size() != sizeof(pricebits) )
Mineropret.resize(sizeof(pricebits));
memcpy(&Mineropret[0],pricebits,sizeof(pricebits));
if ( Mineropret.size() != PRICES_SIZEBIT0 )
Mineropret.resize(PRICES_SIZEBIT0);
memcpy(&Mineropret[0],pricebits,PRICES_SIZEBIT0);
//int32_t i; for (i=0; i<Mineropret.size(); i++)
// fprintf(stderr,"%02x",Mineropret[i]);
//fprintf(stderr," <- set Mineropret[%d]\n",(int32_t)Mineropret.size());