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Calculate collateral ratio when there is actual price update #1007

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merged 1 commit into from
Apr 15, 2022
Merged

Calculate collateral ratio when there is actual price update #1007

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36 changes: 29 additions & 7 deletions src/validation.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -3064,10 +3064,16 @@ void CChainState::ProcessLoanEvents(const CBlockIndex* pindex, CCustomCSView& ca
viewCache.Flush();
}

if (pindex->nHeight % chainparams.GetConsensus().blocksCollateralizationRatioCalculation() == 0) {
static const auto calculationBlock = chainparams.GetConsensus().blocksCollateralizationRatioCalculation();

// non consensus enforced
static bool firstRun = true;
static std::vector<uint256> liquidatedVaults;

if (pindex->nHeight % calculationBlock == 0) {
bool useNextPrice = false, requireLivePrice = true;

cache.ForEachVaultCollateral([&](const CVaultId& vaultId, const CBalances& collaterals) {
auto processVault = [&](const CVaultId& vaultId, const CBalances& collaterals) {
auto collateral = cache.GetLoanCollaterals(vaultId, collaterals, pindex->nHeight, pindex->nTime, useNextPrice, requireLivePrice);
if (!collateral) {
return true;
Expand Down Expand Up @@ -3145,7 +3151,20 @@ void CChainState::ProcessLoanEvents(const CBlockIndex* pindex, CCustomCSView& ca
}

return true;
});
};

auto lastPriceUpdate = pindex->nHeight - (pindex->nHeight % cache.GetIntervalBlock());
if (firstRun || lastPriceUpdate > pindex->nHeight - calculationBlock) {
cache.ForEachVaultCollateral(processVault);
} else {
for (const auto& vaultId : liquidatedVaults) {
if (auto collaterals = cache.GetVaultCollaterals(vaultId)) {
processVault(vaultId, *collaterals);
}
}
}
firstRun = false;
liquidatedVaults.clear();
}

CHistoryWriters writers{nullptr, pburnHistoryDB.get(), pvaultHistoryDB.get()};
Expand Down Expand Up @@ -3222,6 +3241,8 @@ void CChainState::ProcessLoanEvents(const CBlockIndex* pindex, CCustomCSView& ca
view.StoreVault(vaultId, *vault);
view.EraseAuction(vaultId, pindex->nHeight);

liquidatedVaults.push_back(vaultId);

// Store state in vault DB
if (pvaultHistoryDB) {
pvaultHistoryDB->WriteVaultState(view, *pindex, vaultId);
Expand Down Expand Up @@ -3414,20 +3435,21 @@ void CChainState::ProcessOracleEvents(const CBlockIndex* pindex, CCustomCSView&

// Furthermore, the time stamp is always indicative of the
// last price time.
auto nextPrice = fixedIntervalPrice.priceRecord[1];
auto& nextPrice = fixedIntervalPrice.priceRecord[1];
if (nextPrice > 0) {
fixedIntervalPrice.priceRecord[0] = fixedIntervalPrice.priceRecord[1];
auto& currentPrice = fixedIntervalPrice.priceRecord[0];
currentPrice = nextPrice;
}
// keep timestamp updated
fixedIntervalPrice.timestamp = pindex->nTime;
// Use -1 to indicate empty price
fixedIntervalPrice.priceRecord[1] = -1;
nextPrice = -1;
auto aggregatePrice = GetAggregatePrice(cache,
fixedIntervalPrice.priceFeedId.first,
fixedIntervalPrice.priceFeedId.second,
pindex->nTime);
if (aggregatePrice) {
fixedIntervalPrice.priceRecord[1] = aggregatePrice;
nextPrice = aggregatePrice;
} else {
LogPrint(BCLog::ORACLE,"ProcessOracleEvents(): No aggregate price available: %s\n", aggregatePrice.msg);
}
Expand Down