1 files changed, 71 insertions, 7 deletions

diff --git a/src/wallet/wallet.cpp b/src/wallet/wallet.cpp
index 0a915ff9a1..f4472d5bf4 100644
--- a/src/wallet/wallet.cpp
+++ b/src/wallet/wallet.cpp
@@ -455,9 +455,37 @@ bool CWallet::LoadCScript(const CScript& redeemScript)
     return FillableSigningProvider::AddCScript(redeemScript);
 }
 
+static bool ExtractPubKey(const CScript &dest, CPubKey& pubKeyOut)
+{
+    //TODO: Use Solver to extract this?
+    CScript::const_iterator pc = dest.begin();
+    opcodetype opcode;
+    std::vector<unsigned char> vch;
+    if (!dest.GetOp(pc, opcode, vch) || !CPubKey::ValidSize(vch))
+        return false;
+    pubKeyOut = CPubKey(vch);
+    if (!pubKeyOut.IsFullyValid())
+        return false;
+    if (!dest.GetOp(pc, opcode, vch) || opcode != OP_CHECKSIG || dest.GetOp(pc, opcode, vch))
+        return false;
+    return true;
+}
+
+bool CWallet::AddWatchOnlyInMem(const CScript &dest)
+{
+    LOCK(cs_KeyStore);
+    setWatchOnly.insert(dest);
+    CPubKey pubKey;
+    if (ExtractPubKey(dest, pubKey)) {
+        mapWatchKeys[pubKey.GetID()] = pubKey;
+        ImplicitlyLearnRelatedKeyScripts(pubKey);
+    }
+    return true;
+}
+
 bool CWallet::AddWatchOnlyWithDB(WalletBatch &batch, const CScript& dest)
 {
-    if (!FillableSigningProvider::AddWatchOnly(dest))
+    if (!AddWatchOnlyInMem(dest))
         return false;
     const CKeyMetadata& meta = m_script_metadata[CScriptID(dest)];
     UpdateTimeFirstKey(meta.nCreateTime);
@@ -490,8 +518,17 @@ bool CWallet::AddWatchOnly(const CScript& dest, int64_t nCreateTime)
 bool CWallet::RemoveWatchOnly(const CScript &dest)
 {
     AssertLockHeld(cs_wallet);
-    if (!FillableSigningProvider::RemoveWatchOnly(dest))
-        return false;
+    {
+        LOCK(cs_KeyStore);
+        setWatchOnly.erase(dest);
+        CPubKey pubKey;
+        if (ExtractPubKey(dest, pubKey)) {
+            mapWatchKeys.erase(pubKey.GetID());
+        }
+        // Related CScripts are not removed; having superfluous scripts around is
+        // harmless (see comment in ImplicitlyLearnRelatedKeyScripts).
+    }
+
     if (!HaveWatchOnly())
         NotifyWatchonlyChanged(false);
     if (!WalletBatch(*database).EraseWatchOnly(dest))
@@ -502,7 +539,19 @@ bool CWallet::RemoveWatchOnly(const CScript &dest)
 
 bool CWallet::LoadWatchOnly(const CScript &dest)
 {
-    return FillableSigningProvider::AddWatchOnly(dest);
+    return AddWatchOnlyInMem(dest);
+}
+
+bool CWallet::HaveWatchOnly(const CScript &dest) const
+{
+    LOCK(cs_KeyStore);
+    return setWatchOnly.count(dest) > 0;
+}
+
+bool CWallet::HaveWatchOnly() const
+{
+    LOCK(cs_KeyStore);
+    return (!setWatchOnly.empty());
 }
 
 bool CWallet::Unlock(const SecureString& strWalletPassphrase, bool accept_no_keys)
@@ -4687,11 +4736,26 @@ bool CWallet::GetKey(const CKeyID &address, CKey& keyOut) const
     return false;
 }
 
+bool CWallet::GetWatchPubKey(const CKeyID &address, CPubKey &pubkey_out) const
+{
+    LOCK(cs_KeyStore);
+    WatchKeyMap::const_iterator it = mapWatchKeys.find(address);
+    if (it != mapWatchKeys.end()) {
+        pubkey_out = it->second;
+        return true;
+    }
+    return false;
+}
+
 bool CWallet::GetPubKey(const CKeyID &address, CPubKey& vchPubKeyOut) const
 {
     LOCK(cs_KeyStore);
-    if (!IsCrypted())
-        return FillableSigningProvider::GetPubKey(address, vchPubKeyOut);
+    if (!IsCrypted()) {
+        if (!FillableSigningProvider::GetPubKey(address, vchPubKeyOut)) {
+            return GetWatchPubKey(address, vchPubKeyOut);
+        }
+        return true;
+    }
 
     CryptedKeyMap::const_iterator mi = mapCryptedKeys.find(address);
     if (mi != mapCryptedKeys.end())
@@ -4700,7 +4764,7 @@ bool CWallet::GetPubKey(const CKeyID &address, CPubKey& vchPubKeyOut) const
         return true;
     }
     // Check for watch-only pubkeys
-    return FillableSigningProvider::GetPubKey(address, vchPubKeyOut);
+    return GetWatchPubKey(address, vchPubKeyOut);
 }
 
 std::set<CKeyID> CWallet::GetKeys() const