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txdb: assert CCoinsViewDB::GetCoin only returns unspent coins

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The chainstate UTXO database only stores unspent outputs; spent entries are removed.

Assert after reading a `Coin` so corruption or misuse cannot propagate a spent coin through the `GetCoin()` interface.
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Lőrinc 2026-01-03 20:26:04 +01:00
parent 114901c065
commit ee1e40f580
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1 changed files with 4 additions and 1 deletions
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5
src/txdb.cpp
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@ -67,7 +67,10 @@ void CCoinsViewDB::ResizeCache(size_t new_cache_size)
std::optional<Coin> CCoinsViewDB::GetCoin(const COutPoint& outpoint) const
{
if (Coin coin; m_db->Read(CoinEntry(&outpoint), coin)) return coin;
if (Coin coin; m_db->Read(CoinEntry(&outpoint), coin)) {
Assert(!coin.IsSpent()); // The UTXO database should never contain spent coins
return coin;
}
return std::nullopt;
}