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wallet: Minimal fix to restore conflicted transaction notifications

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This fix is a based on the fix by Antoine Riard <ariard@student.42.fr> in
https://github.com/bitcoin/bitcoin/pull/18600.

Unlike that PR, which implements some new behavior, this just restores previous
wallet notification and status behavior for transactions removed from the
mempool because they conflict with transactions in a block. The behavior was
accidentally changed in two `CWallet::BlockConnected` updates:
a31be09bfd and
7e89994133 from
https://github.com/bitcoin/bitcoin/pull/16624, causing issue
https://github.com/bitcoin/bitcoin/issues/18325.

The change here could be improved and replaced with a more comprehensive
cleanup, so it includes a detailed comment explaining future considerations.

Fixes #18325

Co-authored-by: Antoine Riard <ariard@student.42.fr>
This commit is contained in:
Russell Yanofsky
2020-05-15 09:23:55 -04:00
parent e2f6866cca
commit b604c5c8b5
9 changed files with 55 additions and 19 deletions
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5
src/validationinterface.h
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@@ -21,6 +21,7 @@ class CConnman;
class CValidationInterface;
class uint256;
class CScheduler;
enum class MemPoolRemovalReason;
/** Register subscriber */
void RegisterValidationInterface(CValidationInterface* callbacks);
@@ -129,7 +130,7 @@ protected:
*
* Called on a background thread.
*/
virtual void TransactionRemovedFromMempool(const CTransactionRef &ptx) {}
virtual void TransactionRemovedFromMempool(const CTransactionRef &ptx, MemPoolRemovalReason reason) {}
/**
* Notifies listeners of a block being connected.
* Provides a vector of transactions evicted from the mempool as a result.
@@ -197,7 +198,7 @@ public:
void UpdatedBlockTip(const CBlockIndex *, const CBlockIndex *, bool fInitialDownload);
void TransactionAddedToMempool(const CTransactionRef &);
void TransactionRemovedFromMempool(const CTransactionRef &);
void TransactionRemovedFromMempool(const CTransactionRef &, MemPoolRemovalReason);
void BlockConnected(const std::shared_ptr<const CBlock> &, const CBlockIndex *pindex);
void BlockDisconnected(const std::shared_ptr<const CBlock> &, const CBlockIndex* pindex);
void ChainStateFlushed(const CBlockLocator &);