bool CCoinsViewCache::GetCoin(const COutPoint &outpoint, Coin &coin) const {
CCoinsMap::const_iterator it = FetchCoin(outpoint);
if (it != cacheCoins.end()) {
coin = it->second.coin;
return !coin.IsSpent();
}
return false;
}
const Coin& CCoinsViewCache::AccessCoin(const COutPoint &outpoint) const {
CCoinsMap::const_iterator it = FetchCoin(outpoint);
if (it == cacheCoins.end()) {
return coinEmpty;
} else {
return it->second.coin;
}
}
bool CCoinsViewCache::SpendCoin(const COutPoint &outpoint, Coin* moveout) {
CCoinsMap::iterator it = FetchCoin(outpoint);
if (it == cacheCoins.end()) return false;
cachedCoinsUsage -= it->second.coin.DynamicMemoryUsage();
if (moveout) {
*moveout = std::move(it->second.coin);
}
if (it->second.flags & CCoinsCacheEntry::FRESH) {
cacheCoins.erase(it);
} else {
it->second.flags |= CCoinsCacheEntry::DIRTY;
it->second.coin.Clear();
}
return true;
}
void CCoinsViewCache::SpendCoin(const COutPoint &outpoint, Coin* moveout, bool nodeletefresh) {
if (pChainedWitView)
{
// NB! The below is essential for the operation of GetWitness function, otherwise it returns unpredictable and incorrect results.
// For chained view we force everything to 'dirty' because we need to know about fresh coins that have been removed and can't just erase them.
pChainedWitView->SpendCoin(outpoint, NULL, true);
}
CCoinsMap::iterator it = FetchCoin(outpoint);
if (it == cacheCoins.end()) return;
cachedCoinsUsage -= it->second.coin.DynamicMemoryUsage();
if (moveout) {
*moveout = std::move(it->second.coin);
}
if (!nodeletefresh && it->second.flags & CCoinsCacheEntry::FRESH) {
cacheCoins.erase(it);
} else {
it->second.flags |= CCoinsCacheEntry::DIRTY;
it->second.coin.Clear();
}
}
bool CCoinsViewCache::HaveCoin(const COutPoint &outpoint) const {
CCoinsMap::const_iterator it = FetchCoin(outpoint);
return (it != cacheCoins.end() && !it->second.coin.IsSpent());
}
