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Auto merge of #1580 - str4d:1378-repair-witness-cache, r=daira 

Clear witness cache when re-witnessing notes

Closes #1378
This commit is contained in:
zkbot 2016-10-21 00:24:39 -04:00
parent f19cb7b7ee 1b407cba2b
commit 323b8214c2
2 changed files with 25 additions and 1 deletions
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8
src/wallet/gtest/test_wallet.cpp
View File

@ -734,6 +734,14 @@ TEST(wallet_tests, cached_witnesses_chain_tip) {
wallet.GetNoteWitnesses(notes, witnesses, anchor4);
EXPECT_TRUE((bool) witnesses[0]);
EXPECT_EQ(anchor2, anchor4);
// Incrementing with the same block again should not change the cache
uint256 anchor5;
wallet.IncrementNoteWitnesses(&index2, &block2, tree);
std::vector<boost::optional<ZCIncrementalWitness>> witnesses5;
wallet.GetNoteWitnesses(notes, witnesses5, anchor5);
EXPECT_EQ(witnesses, witnesses5);
EXPECT_EQ(anchor4, anchor5);
}
}

18
src/wallet/wallet.cpp
View File

@ -699,7 +699,23 @@ void CWallet::IncrementNoteWitnesses(const CBlockIndex* pindex,
JSOutPoint jsoutpt {hash, i, j};
if (mapWallet[hash].mapNoteData.count(jsoutpt)) {
CNoteData* nd = &(mapWallet[hash].mapNoteData[jsoutpt]);
assert(nd->witnesses.size() == 0);
if (nd->witnesses.size() > 0) {
// We think this can happen because we write out the
// witness cache state after every block increment or
// decrement, but the block index itself is written in
// batches. So if the node crashes in between these two
// operations, it is possible for IncrementNoteWitnesses
// to be called again on previously-cached blocks. This
// doesn't affect existing cached notes because of the
// CNoteData::witnessHeight checks. See #1378 for details.
LogPrintf("Inconsistent witness cache state found for %s\n- Cache size: %d\n- Top (height %d): %s\n- New (height %d): %s\n",
jsoutpt.ToString(), nd->witnesses.size(),
nd->witnessHeight,
nd->witnesses.front().root().GetHex(),
pindex->nHeight,
tree.witness().root().GetHex());
nd->witnesses.clear();
}
nd->witnesses.push_front(tree.witness());
// Set height to one less than pindex so it gets incremented
nd->witnessHeight = pindex->nHeight - 1;