From 54b3d964a174535eb41651d478924ace193f999c Mon Sep 17 00:00:00 2001
From: Sunny King <sunnyking9999@gmail.com>
Date: Sat, 24 Mar 2012 16:33:53 +0000
Subject: [PATCH] PPCoin: Mark inputs unspent in wallet when disconnecting coinstake

---
 src/main.cpp   |   16 +++++++++++++++-
 src/wallet.cpp |   23 +++++++++++++++++++++++
 src/wallet.h   |    1 +
 3 files changed, 39 insertions(+), 1 deletions(-)

diff --git a/src/main.cpp b/src/main.cpp
index 60d0704..dae457f 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -116,8 +116,18 @@ void static EraseFromWallets(uint256 hash)
 }
 
 // make sure all wallets know about the given transaction, in the given block
-void static SyncWithWallets(const CTransaction& tx, const CBlock* pblock = NULL, bool fUpdate = false)
+void static SyncWithWallets(const CTransaction& tx, const CBlock* pblock = NULL, bool fUpdate = false, bool fConnect = true)
 {
+    if (!fConnect)
+    {
+        // ppcoin: wallets need to refund inputs when disconnecting coinstake
+        if (tx.IsCoinStake())
+            BOOST_FOREACH(CWallet* pwallet, setpwalletRegistered)
+                if (pwallet->IsFromMe(tx))
+                    pwallet->DisableTransaction(tx);
+        return;
+    }
+
     BOOST_FOREACH(CWallet* pwallet, setpwalletRegistered)
         pwallet->AddToWalletIfInvolvingMe(tx, pblock, fUpdate);
 }
@@ -1038,6 +1048,10 @@ bool CBlock::DisconnectBlock(CTxDB& txdb, CBlockIndex* pindex)
             return error("DisconnectBlock() : WriteBlockIndex failed");
     }
 
+    // ppcoin: clean up wallet after disconnecting coinstake
+    BOOST_FOREACH(CTransaction& tx, vtx)
+        SyncWithWallets(tx, this, false, false);
+
     return true;
 }
 
diff --git a/src/wallet.cpp b/src/wallet.cpp
index 29cc87a..fd8e9c2 100644
--- a/src/wallet.cpp
+++ b/src/wallet.cpp
@@ -1552,6 +1552,29 @@ void CWallet::FixSpentCoins(int& nMismatchFound, int64& nBalanceInQuestion)
     }
 }
 
+// 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
+    CRITICAL_BLOCK(cs_wallet)
+    {
+        BOOST_FOREACH(const CTxIn& txin, tx.vin)
+        {
+            map<uint256, CWalletTx>::iterator mi = mapWallet.find(txin.prevout.hash);
+            if (mi != mapWallet.end())
+            {
+                CWalletTx& prev = (*mi).second;
+                if (txin.prevout.n < prev.vout.size() && IsMine(prev.vout[txin.prevout.n]))
+                {
+                    prev.MarkUnspent(txin.prevout.n);
+                    prev.WriteToDisk();
+                }
+            }
+        }
+    }
+}
+
 vector<unsigned char> CReserveKey::GetReservedKey()
 {
     if (nIndex == -1)
diff --git a/src/wallet.h b/src/wallet.h
index 2fb41db..4beebb8 100644
--- a/src/wallet.h
+++ b/src/wallet.h
@@ -216,6 +216,7 @@ public:
 
     bool CheckSpentCoins(int& nMismatchSpent, int64& nBalanceInQuestion);
     void FixSpentCoins(int& nMismatchSpent, int64& nBalanceInQuestion);
+    void DisableTransaction(const CTransaction &tx);
 };
 
 
-- 
1.7.1