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try use floating point to calc average costbasis

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dimxy
2019-04-29 21:50:55 +05:00
parent d81d30a27c
commit 0467d13a10
1 changed files with 7 additions and 5 deletions
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12
src/cc/prices.cpp
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@@ -1334,18 +1334,20 @@ UniValue PricesInfo(uint256 bettxid, int32_t refheight)
int64_t totalbets = 0;
int64_t totalprofits = 0;
int64_t costbasis = 0;
double dcostbasis = 0.0;
for (auto b : bets) {
totalbets += b.amount;
totalprofits += b.profits;
costbasis += b.amount * (b.costbasis / PRICES_POINTFACTOR); // prevent int64 overflow
std::cerr << "PricesInfo() acc costbasis=" << costbasis << " b.amount=" << b.amount << " b.costbasis/PRICES_POINTFACTOR=" << (b.costbasis / PRICES_POINTFACTOR) << std::endl;
dcostbasis += b.amount * b.costbasis;
// costbasis += b.amount * (b.costbasis / PRICES_POINTFACTOR); // prevent int64 overflow (but we have underflow for 1/BTC)
// std::cerr << "PricesInfo() acc costbasis=" << costbasis << " b.amount=" << b.amount << " b.costbasis/PRICES_POINTFACTOR=" << (b.costbasis / PRICES_POINTFACTOR) << std::endl;
}
int64_t equity = totalbets + totalprofits;
int64_t costbasis;
if (totalbets != 0) { //prevent zero div
costbasis *= PRICES_POINTFACTOR; // save last 0.0000xxxx positions
costbasis /= totalbets;
// costbasis *= PRICES_POINTFACTOR; // save last 0.0000xxxx positions
costbasis = (int64_t) (dcostbasis / (double)totalbets);
}
else
costbasis = 0;