Add new rpc call: abandontransaction

Unconfirmed transactions that are not in your mempool either due to eviction or other means may be unlikely to be mined.  abandontransaction gives the wallet a way to no longer consider as spent the coins that are inputs to such a transaction.  All dependent transactions in the wallet will also be marked as abandoned.

1 files changed, 10 insertions, 1 deletions

diff --git a/src/wallet/wallet.h b/src/wallet/wallet.h
index 53a2b96690..1ab173badb 100644
--- a/src/wallet/wallet.h
+++ b/src/wallet/wallet.h
@@ -155,6 +155,10 @@ struct COutputEntry
 /** A transaction with a merkle branch linking it to the block chain. */
 class CMerkleTx : public CTransaction
 {
+private:
+  /** Constant used in hashBlock to indicate tx has been abandoned */
+    static const uint256 ABANDON_HASH;
+
 public:
     uint256 hashBlock;
 
@@ -206,6 +210,9 @@ public:
     bool IsInMainChain() const { const CBlockIndex *pindexRet; return GetDepthInMainChain(pindexRet) > 0; }
     int GetBlocksToMaturity() const;
     bool AcceptToMemoryPool(bool fLimitFree=true, bool fRejectAbsurdFee=true);
+    bool hashUnset() const { return (hashBlock.IsNull() || hashBlock == ABANDON_HASH); }
+    bool isAbandoned() const { return (hashBlock == ABANDON_HASH); }
+    void setAbandoned() { hashBlock = ABANDON_HASH; }
 };
 
 /** 
@@ -486,7 +493,6 @@ private:
     /* Mark a transaction (and its in-wallet descendants) as conflicting with a particular block. */
     void MarkConflicted(const uint256& hashBlock, const uint256& hashTx);
 
-
     void SyncMetaData(std::pair<TxSpends::iterator, TxSpends::iterator>);
 
 public:
@@ -783,6 +789,9 @@ public:
     bool GetBroadcastTransactions() const { return fBroadcastTransactions; }
     /** Set whether this wallet broadcasts transactions. */
     void SetBroadcastTransactions(bool broadcast) { fBroadcastTransactions = broadcast; }
+
+    /* Mark a transaction (and it in-wallet descendants) as abandoned so its inputs may be respent. */
+    bool AbandonTransaction(const uint256& hashTx);
 };
 
 /** A key allocated from the key pool. */