[wallet] Cache keyid -> keypool id mappings

src/wallet/rpcdump.cpp

@@ -619,9 +619,8 @@ UniValue dumpwallet(const JSONRPCRequest& request)
         throw JSONRPCError(RPC_INVALID_PARAMETER, "Cannot open wallet dump file");
 
     std::map<CTxDestination, int64_t> mapKeyBirth;
-    std::set<CKeyID> setKeyPool;
+    const std::map<CKeyID, int64_t>& mapKeyPool = pwallet->GetAllReserveKeys();
     pwallet->GetKeyBirthTimes(mapKeyBirth);
-    pwallet->GetAllReserveKeys(setKeyPool);
 
     // sort time/key pairs
     std::vector<std::pair<int64_t, CKeyID> > vKeyBirth;
@@ -666,7 +665,7 @@ UniValue dumpwallet(const JSONRPCRequest& request)
                 file << strprintf("label=%s", EncodeDumpString(pwallet->mapAddressBook[keyid].name));
             } else if (keyid == masterKeyID) {
                 file << "hdmaster=1";
-            } else if (setKeyPool.count(keyid)) {
+            } else if (mapKeyPool.count(keyid)) {
                 file << "reserve=1";
             } else if (pwallet->mapKeyMetadata[keyid].hdKeypath == "m") {
                 file << "inactivehdmaster=1";

src/wallet/wallet.cpp

@@ -3077,6 +3077,7 @@ DBErrors CWallet::LoadWallet(bool& fFirstRunRet)
             LOCK(cs_wallet);
             setInternalKeyPool.clear();
             setExternalKeyPool.clear();
+            m_pool_key_to_index.clear();
             // Note: can't top-up keypool here, because wallet is locked.
             // User will be prompted to unlock wallet the next operation
             // that requires a new key.
@@ -3106,6 +3107,7 @@ DBErrors CWallet::ZapSelectTx(std::vector<uint256>& vHashIn, std::vector<uint256
         {
             setInternalKeyPool.clear();
             setExternalKeyPool.clear();
+            m_pool_key_to_index.clear();
             // Note: can't top-up keypool here, because wallet is locked.
             // User will be prompted to unlock wallet the next operation
             // that requires a new key.
@@ -3132,6 +3134,7 @@ DBErrors CWallet::ZapWalletTx(std::vector<CWalletTx>& vWtx)
             LOCK(cs_wallet);
             setInternalKeyPool.clear();
             setExternalKeyPool.clear();
+            m_pool_key_to_index.clear();
             // Note: can't top-up keypool here, because wallet is locked.
             // User will be prompted to unlock wallet the next operation
             // that requires a new key.
@@ -3226,6 +3229,8 @@ bool CWallet::NewKeyPool()
         }
         setExternalKeyPool.clear();
 
+        m_pool_key_to_index.clear();
+
         if (!TopUpKeyPool()) {
             return false;
         }
@@ -3242,12 +3247,14 @@ size_t CWallet::KeypoolCountExternalKeys()
 
 void CWallet::LoadKeyPool(int64_t nIndex, const CKeyPool &keypool)
 {
+    AssertLockHeld(cs_wallet);
     if (keypool.fInternal) {
         setInternalKeyPool.insert(nIndex);
     } else {
         setExternalKeyPool.insert(nIndex);
     }
     m_max_keypool_index = std::max(m_max_keypool_index, nIndex);
+    m_pool_key_to_index[keypool.vchPubKey.GetID()] = nIndex;
 
     // If no metadata exists yet, create a default with the pool key's
     // creation time. Note that this may be overwritten by actually
@@ -3293,7 +3300,8 @@ bool CWallet::TopUpKeyPool(unsigned int kpSize)
             assert(m_max_keypool_index < std::numeric_limits<int64_t>::max()); // How in the hell did you use so many keys?
             int64_t index = ++m_max_keypool_index;
 
-            if (!walletdb.WritePool(index, CKeyPool(GenerateNewKey(walletdb, internal), internal))) {
+            CPubKey pubkey(GenerateNewKey(walletdb, internal));
+            if (!walletdb.WritePool(index, CKeyPool(pubkey, internal))) {
                 throw std::runtime_error(std::string(__func__) + ": writing generated key failed");
             }
 
@@ -3302,6 +3310,7 @@ bool CWallet::TopUpKeyPool(unsigned int kpSize)
             } else {
                 setExternalKeyPool.insert(index);
             }
+            m_pool_key_to_index[pubkey.GetID()] = index;
         }
         if (missingInternal + missingExternal > 0) {
             LogPrintf("keypool added %d keys (%d internal), size=%u (%u internal)\n", missingInternal + missingExternal, missingInternal, setInternalKeyPool.size() + setExternalKeyPool.size(), setInternalKeyPool.size());
@@ -3343,6 +3352,7 @@ void CWallet::ReserveKeyFromKeyPool(int64_t& nIndex, CKeyPool& keypool, bool fRe
         }
 
         assert(keypool.vchPubKey.IsValid());
+        m_pool_key_to_index.erase(keypool.vchPubKey.GetID());
         LogPrintf("keypool reserve %d\n", nIndex);
     }
 }
@@ -3355,7 +3365,7 @@ void CWallet::KeepKey(int64_t nIndex)
     LogPrintf("keypool keep %d\n", nIndex);
 }
 
-void CWallet::ReturnKey(int64_t nIndex, bool fInternal)
+void CWallet::ReturnKey(int64_t nIndex, bool fInternal, const CPubKey& pubkey)
 {
     // Return to key pool
     {
@@ -3365,6 +3375,7 @@ void CWallet::ReturnKey(int64_t nIndex, bool fInternal)
         } else {
             setExternalKeyPool.insert(nIndex);
         }
+        m_pool_key_to_index[pubkey.GetID()] = nIndex;
     }
     LogPrintf("keypool return %d\n", nIndex);
 }
@@ -3594,41 +3605,12 @@ void CReserveKey::KeepKey()
 void CReserveKey::ReturnKey()
 {
     if (nIndex != -1) {
-        pwallet->ReturnKey(nIndex, fInternal);
+        pwallet->ReturnKey(nIndex, fInternal, vchPubKey);
     }
     nIndex = -1;
     vchPubKey = CPubKey();
 }
 
-static void LoadReserveKeysToSet(std::set<CKeyID>& setAddress, const std::set<int64_t>& setKeyPool, CWalletDB& walletdb) {
-    for (const int64_t& id : setKeyPool)
-    {
-        CKeyPool keypool;
-        if (!walletdb.ReadPool(id, keypool))
-            throw std::runtime_error(std::string(__func__) + ": read failed");
-        assert(keypool.vchPubKey.IsValid());
-        CKeyID keyID = keypool.vchPubKey.GetID();
-        setAddress.insert(keyID);
-    }
-}
-
-void CWallet::GetAllReserveKeys(std::set<CKeyID>& setAddress) const
-{
-    setAddress.clear();
-
-    CWalletDB walletdb(*dbw);
-
-    LOCK2(cs_main, cs_wallet);
-    LoadReserveKeysToSet(setAddress, setInternalKeyPool, walletdb);
-    LoadReserveKeysToSet(setAddress, setExternalKeyPool, walletdb);
-
-    for (const CKeyID& keyID : setAddress) {
-        if (!HaveKey(keyID)) {
-            throw std::runtime_error(std::string(__func__) + ": unknown key in key pool");
-        }
-    }
-}
-
 void CWallet::GetScriptForMining(std::shared_ptr<CReserveScript> &script)
 {
     std::shared_ptr<CReserveKey> rKey = std::make_shared<CReserveKey>(this);

src/wallet/wallet.h

@@ -704,6 +704,7 @@ private:
     std::set<int64_t> setInternalKeyPool;
     std::set<int64_t> setExternalKeyPool;
     int64_t m_max_keypool_index;
+    std::map<CKeyID, int64_t> m_pool_key_to_index;
 
     int64_t nTimeFirstKey;
 
@@ -973,10 +974,10 @@ public:
     bool TopUpKeyPool(unsigned int kpSize = 0);
     void ReserveKeyFromKeyPool(int64_t& nIndex, CKeyPool& keypool, bool fRequestedInternal);
     void KeepKey(int64_t nIndex);
-    void ReturnKey(int64_t nIndex, bool fInternal);
+    void ReturnKey(int64_t nIndex, bool fInternal, const CPubKey& pubkey);
     bool GetKeyFromPool(CPubKey &key, bool internal = false);
     int64_t GetOldestKeyPoolTime();
-    void GetAllReserveKeys(std::set<CKeyID>& setAddress) const;
+    const std::map<CKeyID, int64_t>& GetAllReserveKeys() const { return m_pool_key_to_index; }
 
     std::set< std::set<CTxDestination> > GetAddressGroupings();
     std::map<CTxDestination, CAmount> GetAddressBalances();