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Return a bool in SpendCoin to restore pre-per-utxo assert semantics

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Since its free to do so, assert that Spends succeeded when we expect
them to.
This commit is contained in:
Matt Corallo 2017-06-05 11:50:47 -04:00
parent ec1271f2be
commit 3533fb4d33
3 changed files with 8 additions and 6 deletions
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5
src/coins.cpp
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@ -91,9 +91,9 @@ void AddCoins(CCoinsViewCache& cache, const CTransaction &tx, int nHeight) {
}
}
void CCoinsViewCache::SpendCoin(const COutPoint &outpoint, Coin* moveout) {
bool CCoinsViewCache::SpendCoin(const COutPoint &outpoint, Coin* moveout) {
CCoinsMap::iterator it = FetchCoin(outpoint);
if (it == cacheCoins.end()) return;
if (it == cacheCoins.end()) return false;
cachedCoinsUsage -= it->second.coin.DynamicMemoryUsage();
if (moveout) {
*moveout = std::move(it->second.coin);
@ -104,6 +104,7 @@ void CCoinsViewCache::SpendCoin(const COutPoint &outpoint, Coin* moveout) {
it->second.flags |= CCoinsCacheEntry::DIRTY;
it->second.coin.Clear();
}
return true;
}
static const Coin coinEmpty;

2
src/coins.h
View file

@ -238,7 +238,7 @@ public:
* If no unspent output exists for the passed outpoint, this call
* has no effect.
*/
void SpendCoin(const COutPoint &outpoint, Coin* moveto = nullptr);
bool SpendCoin(const COutPoint &outpoint, Coin* moveto = nullptr);
/**
* Push the modifications applied to this cache to its base.

7
src/validation.cpp
View file

@ -1118,7 +1118,8 @@ void UpdateCoins(const CTransaction& tx, CCoinsViewCache& inputs, CTxUndo &txund
txundo.vprevout.reserve(tx.vin.size());
BOOST_FOREACH(const CTxIn &txin, tx.vin) {
txundo.vprevout.emplace_back();
inputs.SpendCoin(txin.prevout, &txundo.vprevout.back());
bool is_spent = inputs.SpendCoin(txin.prevout, &txundo.vprevout.back());
assert(is_spent);
}
}
// add outputs
@ -1358,8 +1359,8 @@ static DisconnectResult DisconnectBlock(const CBlock& block, const CBlockIndex*
if (!tx.vout[o].scriptPubKey.IsUnspendable()) {
COutPoint out(hash, o);
Coin coin;
view.SpendCoin(out, &coin);
if (tx.vout[o] != coin.out) {
bool is_spent = view.SpendCoin(out, &coin);
if (!is_spent || tx.vout[o] != coin.out) {
fClean = false; // transaction output mismatch
}
}