From 3278c5c134c4e95d8df7ec76c3335a8b9d08676a Mon Sep 17 00:00:00 2001
From: janko33bd <janko33bd@gmail.com>
Date: Fri, 23 Jun 2017 20:56:54 +0200
Subject: [PATCH] ppcoin: disable transaction (only for coinstake)

---
 src/wallet/wallet.cpp | 67 ++++++++++++++++++++++++++++++++++++++++++-
 src/wallet/wallet.h   |  5 ++++
 2 files changed, 71 insertions(+), 1 deletion(-)

diff --git a/src/wallet/wallet.cpp b/src/wallet/wallet.cpp
index ddbbd69f0..223f0aeab 100644
--- a/src/wallet/wallet.cpp
+++ b/src/wallet/wallet.cpp
@@ -486,6 +486,23 @@ void CWallet::AddToSpends(const COutPoint& outpoint, const uint256& wtxid)
 }
 
 
+void CWallet::RemoveFromSpends(const COutPoint& outpoint, const uint256& wtxid)
+{
+    pair<TxSpends::iterator, TxSpends::iterator> range;
+    range = mapTxSpends.equal_range(outpoint);
+    TxSpends::iterator it = range.first;
+    for(; it != range.second; ++ it)
+    {
+        if(it->second == wtxid)
+        {
+            mapTxSpends.erase(it);
+            break;
+        }
+    }
+    range = mapTxSpends.equal_range(outpoint);
+    SyncMetaData(range);
+}
+
 void CWallet::AddToSpends(const uint256& wtxid)
 {
     assert(mapWallet.count(wtxid));
@@ -497,6 +514,17 @@ void CWallet::AddToSpends(const uint256& wtxid)
         AddToSpends(txin.prevout, wtxid);
 }
 
+void CWallet::RemoveFromSpends(const uint256& wtxid)
+{
+    assert(mapWallet.count(wtxid));
+    CWalletTx& thisTx = mapWallet[wtxid];
+	if (thisTx.IsCoinBase()) // Coinbases don't spend anything!
+        return;
+
+    BOOST_FOREACH(const CTxIn& txin, thisTx.vin)
+        RemoveFromSpends(txin.prevout, wtxid);
+}
+
 void CWallet::AvailableCoinsForStaking(std::vector<COutput>& vCoins) const
 {
     vCoins.clear();
@@ -1204,7 +1232,20 @@ void CWallet::MarkConflicted(const uint256& hashBlock, const uint256& hashTx)
 
 void CWallet::SyncTransaction(const CTransaction& tx, const CBlock* pblock)
 {
-    LOCK2(cs_main, cs_wallet);
+
+
+
+	LOCK2(cs_main, cs_wallet);
+
+	if (!pblock) {
+		// wallets need to refund inputs when disconnecting coinstake
+		if (tx.IsCoinStake()) {
+			if (IsFromMe(tx)) {
+				DisableTransaction(tx);
+				return;
+			}
+		}
+	}
 
     if (!AddToWalletIfInvolvingMe(tx, pblock, true))
         return; // Not one of ours
@@ -3054,6 +3095,30 @@ std::set<CTxDestination> CWallet::GetAccountAddresses(const std::string& strAcco
     return result;
 }
 
+// ppcoin: disable transaction (only for coinstake)
+void CWallet::DisableTransaction(const CTransaction &tx)
+{
+    if (!tx.IsCoinStake() || !IsFromMe(tx))
+        return; // only disconnecting coinstake requires marking input unspent
+
+    LOCK(cs_wallet);
+    uint256 hash = tx.GetHash();
+    if(AbandonTransaction(hash))
+    {
+        RemoveFromSpends(hash);
+        set<CWalletTx*> setCoins;
+        BOOST_FOREACH(const CTxIn& txin, tx.vin)
+        {
+            CWalletTx &coin = mapWallet[txin.prevout.hash];
+            coin.BindWallet(this);
+            NotifyTransactionChanged(this, coin.GetHash(), CT_UPDATED);
+        }
+        CWalletTx& wtx = mapWallet[hash];
+        wtx.BindWallet(this);
+        NotifyTransactionChanged(this, hash, CT_DELETED);
+    }
+}
+
 bool CReserveKey::GetReservedKey(CPubKey& pubkey)
 {
     if (nIndex == -1)
diff --git a/src/wallet/wallet.h b/src/wallet/wallet.h
index 154c2f5a0..19cfcc786 100644
--- a/src/wallet/wallet.h
+++ b/src/wallet/wallet.h
@@ -499,7 +499,10 @@ private:
     typedef std::multimap<COutPoint, uint256> TxSpends;
     TxSpends mapTxSpends;
     void AddToSpends(const COutPoint& outpoint, const uint256& wtxid);
+    void RemoveFromSpends(const COutPoint& outpoint, const uint256& wtxid);
     void AddToSpends(const uint256& wtxid);
+    void RemoveFromSpends(const uint256& wtxid);
+
 
     /* Mark a transaction (and its in-wallet descendants) as conflicting with a particular block. */
     void MarkConflicted(const uint256& hashBlock, const uint256& hashTx);
@@ -767,6 +770,8 @@ public:
     //! get the current wallet format (the oldest client version guaranteed to understand this wallet)
     int GetVersion() { LOCK(cs_wallet); return nWalletVersion; }
 
+    void DisableTransaction(const CTransaction &tx);
+
     //! Get wallet transactions that conflict with given transaction (spend same outputs)
     std::set<uint256> GetConflicts(const uint256& txid) const;