Fix off-by-one error w/ nLockTime in the wallet

Previously due to an off-by-one error the wallet ignored
nLockTime-by-height transactions that would be valid in the next block
even though they are accepted into the mempool. The transactions
wouldn't show up until confirmed, nor would they be included in the
unconfirmed balance. Similar to the mempool behavior fix in 665bdd3b,
the wallet code was calling IsFinalTx() directly without taking into
account the fact that doing so tells you if the transaction could have
been mined in the *current* block, rather than the next block.

To fix this we strip IsFinalTx() of non-consensus-critical
functionality, removing the default arguments, and add CheckFinalTx() to
check if a transaction will be final in the next block.

2 files changed, 9 insertions, 9 deletions

diff --git a/src/wallet/rpcwallet.cpp b/src/wallet/rpcwallet.cpp
index dd5240e3c0..3f55b04273 100644
--- a/src/wallet/rpcwallet.cpp
+++ b/src/wallet/rpcwallet.cpp
@@ -588,7 +588,7 @@ Value getreceivedbyaddress(const Array& params, bool fHelp)
     for (map<uint256, CWalletTx>::iterator it = pwalletMain->mapWallet.begin(); it != pwalletMain->mapWallet.end(); ++it)
     {
         const CWalletTx& wtx = (*it).second;
-        if (wtx.IsCoinBase() || !IsFinalTx(wtx))
+        if (wtx.IsCoinBase() || !CheckFinalTx(wtx))
             continue;
 
         BOOST_FOREACH(const CTxOut& txout, wtx.vout)
@@ -642,7 +642,7 @@ Value getreceivedbyaccount(const Array& params, bool fHelp)
     for (map<uint256, CWalletTx>::iterator it = pwalletMain->mapWallet.begin(); it != pwalletMain->mapWallet.end(); ++it)
     {
         const CWalletTx& wtx = (*it).second;
-        if (wtx.IsCoinBase() || !IsFinalTx(wtx))
+        if (wtx.IsCoinBase() || !CheckFinalTx(wtx))
             continue;
 
         BOOST_FOREACH(const CTxOut& txout, wtx.vout)
@@ -666,7 +666,7 @@ CAmount GetAccountBalance(CWalletDB& walletdb, const string& strAccount, int nMi
     for (map<uint256, CWalletTx>::iterator it = pwalletMain->mapWallet.begin(); it != pwalletMain->mapWallet.end(); ++it)
     {
         const CWalletTx& wtx = (*it).second;
-        if (!IsFinalTx(wtx) || wtx.GetBlocksToMaturity() > 0 || wtx.GetDepthInMainChain() < 0)
+        if (!CheckFinalTx(wtx) || wtx.GetBlocksToMaturity() > 0 || wtx.GetDepthInMainChain() < 0)
             continue;
 
         CAmount nReceived, nSent, nFee;
@@ -1109,7 +1109,7 @@ Value ListReceived(const Array& params, bool fByAccounts)
     {
         const CWalletTx& wtx = (*it).second;
 
-        if (wtx.IsCoinBase() || !IsFinalTx(wtx))
+        if (wtx.IsCoinBase() || !CheckFinalTx(wtx))
             continue;
 
         int nDepth = wtx.GetDepthInMainChain();
diff --git a/src/wallet/wallet.cpp b/src/wallet/wallet.cpp
index 3396a3a188..94687d289f 100644
--- a/src/wallet/wallet.cpp
+++ b/src/wallet/wallet.cpp
@@ -1317,7 +1317,7 @@ CAmount CWalletTx::GetChange() const
 bool CWalletTx::IsTrusted() const
 {
     // Quick answer in most cases
-    if (!IsFinalTx(*this))
+    if (!CheckFinalTx(*this))
         return false;
     int nDepth = GetDepthInMainChain();
     if (nDepth >= 1)
@@ -1423,7 +1423,7 @@ CAmount CWallet::GetUnconfirmedBalance() const
         for (map<uint256, CWalletTx>::const_iterator it = mapWallet.begin(); it != mapWallet.end(); ++it)
         {
             const CWalletTx* pcoin = &(*it).second;
-            if (!IsFinalTx(*pcoin) || (!pcoin->IsTrusted() && pcoin->GetDepthInMainChain() == 0))
+            if (!CheckFinalTx(*pcoin) || (!pcoin->IsTrusted() && pcoin->GetDepthInMainChain() == 0))
                 nTotal += pcoin->GetAvailableCredit();
         }
     }
@@ -1468,7 +1468,7 @@ CAmount CWallet::GetUnconfirmedWatchOnlyBalance() const
         for (map<uint256, CWalletTx>::const_iterator it = mapWallet.begin(); it != mapWallet.end(); ++it)
         {
             const CWalletTx* pcoin = &(*it).second;
-            if (!IsFinalTx(*pcoin) || (!pcoin->IsTrusted() && pcoin->GetDepthInMainChain() == 0))
+            if (!CheckFinalTx(*pcoin) || (!pcoin->IsTrusted() && pcoin->GetDepthInMainChain() == 0))
                 nTotal += pcoin->GetAvailableWatchOnlyCredit();
         }
     }
@@ -1503,7 +1503,7 @@ void CWallet::AvailableCoins(vector<COutput>& vCoins, bool fOnlyConfirmed, const
             const uint256& wtxid = it->first;
             const CWalletTx* pcoin = &(*it).second;
 
-            if (!IsFinalTx(*pcoin))
+            if (!CheckFinalTx(*pcoin))
                 continue;
 
             if (fOnlyConfirmed && !pcoin->IsTrusted())
@@ -2290,7 +2290,7 @@ std::map<CTxDestination, CAmount> CWallet::GetAddressBalances()
         {
             CWalletTx *pcoin = &walletEntry.second;
 
-            if (!IsFinalTx(*pcoin) || !pcoin->IsTrusted())
+            if (!CheckFinalTx(*pcoin) || !pcoin->IsTrusted())
                 continue;
 
             if (pcoin->IsCoinBase() && pcoin->GetBlocksToMaturity() > 0)