From f5813bdd3eb93a2a8d7ba01989eef5b299fcbca4 Mon Sep 17 00:00:00 2001
From: Matt Corallo <git@bluematt.me>
Date: Wed, 10 Jun 2015 01:04:08 -0700
Subject: Add logic to track pubkeys as watch-only, not just scripts

---
 src/keystore.cpp | 41 +++++++++++++++++++++++++++++++++++------
 1 file changed, 35 insertions(+), 6 deletions(-)

(limited to 'src/keystore.cpp')

diff --git a/src/keystore.cpp b/src/keystore.cpp
index 3bae24b7b9..cf49ba83ad 100644
--- a/src/keystore.cpp
+++ b/src/keystore.cpp
@@ -6,23 +6,30 @@
 #include "keystore.h"
 
 #include "key.h"
+#include "pubkey.h"
 #include "util.h"
 
 #include <boost/foreach.hpp>
 
-bool CKeyStore::GetPubKey(const CKeyID &address, CPubKey &vchPubKeyOut) const
+bool CKeyStore::AddKey(const CKey &key) {
+    return AddKeyPubKey(key, key.GetPubKey());
+}
+
+bool CBasicKeyStore::GetPubKey(const CKeyID &address, CPubKey &vchPubKeyOut) const
 {
     CKey key;
-    if (!GetKey(address, key))
+    if (!GetKey(address, key)) {
+        WatchKeyMap::const_iterator it = mapWatchKeys.find(address);
+        if (it != mapWatchKeys.end()) {
+            vchPubKeyOut = it->second;
+            return true;
+        }
         return false;
+    }
     vchPubKeyOut = key.GetPubKey();
     return true;
 }
 
-bool CKeyStore::AddKey(const CKey &key) {
-    return AddKeyPubKey(key, key.GetPubKey());
-}
-
 bool CBasicKeyStore::AddKeyPubKey(const CKey& key, const CPubKey &pubkey)
 {
     LOCK(cs_KeyStore);
@@ -58,10 +65,29 @@ bool CBasicKeyStore::GetCScript(const CScriptID &hash, CScript& redeemScriptOut)
     return false;
 }
 
+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) || vch.size() < 33 || vch.size() > 65)
+        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 CBasicKeyStore::AddWatchOnly(const CScript &dest)
 {
     LOCK(cs_KeyStore);
     setWatchOnly.insert(dest);
+    CPubKey pubKey;
+    if (ExtractPubKey(dest, pubKey))
+        mapWatchKeys[pubKey.GetID()] = pubKey;
     return true;
 }
 
@@ -69,6 +95,9 @@ bool CBasicKeyStore::RemoveWatchOnly(const CScript &dest)
 {
     LOCK(cs_KeyStore);
     setWatchOnly.erase(dest);
+    CPubKey pubKey;
+    if (ExtractPubKey(dest, pubKey))
+        mapWatchKeys.erase(pubKey.GetID());
     return true;
 }
 
-- 
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