Switch miner to P2PKH, add -mineraddress option

Closes #945 and #1955.

src/Makefile.gtest.include

@@ -26,6 +26,7 @@ zcash_gtest_SOURCES += \
 	gtest/test_noteencryption.cpp \
 	gtest/test_merkletree.cpp \
 	gtest/test_metrics.cpp \
+	gtest/test_miner.cpp \
 	gtest/test_pow.cpp \
 	gtest/test_random.cpp \
 	gtest/test_rpc.cpp \

src/gtest/test_miner.cpp

@@ -0,0 +1,103 @@
+#include <gmock/gmock.h>
+#include <gtest/gtest.h>
+
+#include "chainparams.h"
+#include "key.h"
+#include "miner.h"
+#include "util.h"
+#ifdef ENABLE_WALLET
+#include "wallet/wallet.h"
+#endif
+
+#include <boost/optional.hpp>
+
+using ::testing::Return;
+
+#ifdef ENABLE_WALLET
+class MockReserveKey : public CReserveKey {
+public:
+    MockReserveKey() : CReserveKey(nullptr) { }
+
+    MOCK_METHOD1(GetReservedKey, bool(CPubKey &pubkey));
+};
+#endif
+
+TEST(Miner, GetMinerScriptPubKey) {
+    SelectParams(CBaseChainParams::MAIN);
+
+    boost::optional<CScript> scriptPubKey;
+#ifdef ENABLE_WALLET
+    MockReserveKey reservekey;
+    EXPECT_CALL(reservekey, GetReservedKey(::testing::_))
+        .WillRepeatedly(Return(false));
+#endif
+
+    // No miner address set
+#ifdef ENABLE_WALLET
+    scriptPubKey = GetMinerScriptPubKey(reservekey);
+#else
+    scriptPubKey = GetMinerScriptPubKey();
+#endif
+    EXPECT_FALSE((bool) scriptPubKey);
+
+    mapArgs["-mineraddress"] = "notAnAddress";
+#ifdef ENABLE_WALLET
+    scriptPubKey = GetMinerScriptPubKey(reservekey);
+#else
+    scriptPubKey = GetMinerScriptPubKey();
+#endif
+    EXPECT_FALSE((bool) scriptPubKey);
+
+    // Partial address
+    mapArgs["-mineraddress"] = "t1T8yaLVhNqxA5KJcmiqq";
+#ifdef ENABLE_WALLET
+    scriptPubKey = GetMinerScriptPubKey(reservekey);
+#else
+    scriptPubKey = GetMinerScriptPubKey();
+#endif
+    EXPECT_FALSE((bool) scriptPubKey);
+
+    // Typo in address
+    mapArgs["-mineraddress"] = "t1TByaLVhNqxA5KJcmiqqFN88e8DNp2PBfF";
+#ifdef ENABLE_WALLET
+    scriptPubKey = GetMinerScriptPubKey(reservekey);
+#else
+    scriptPubKey = GetMinerScriptPubKey();
+#endif
+    EXPECT_FALSE((bool) scriptPubKey);
+
+    // Set up expected scriptPubKey for t1T8yaLVhNqxA5KJcmiqqFN88e8DNp2PBfF
+    CKeyID keyID;
+    keyID.SetHex("eb88f1c65b39a823479ac9c7db2f4a865960a165");
+    CScript expectedScriptPubKey = CScript() << OP_DUP << OP_HASH160 << ToByteVector(keyID) << OP_EQUALVERIFY << OP_CHECKSIG;
+
+    // Valid address
+    mapArgs["-mineraddress"] = "t1T8yaLVhNqxA5KJcmiqqFN88e8DNp2PBfF";
+#ifdef ENABLE_WALLET
+    scriptPubKey = GetMinerScriptPubKey(reservekey);
+#else
+    scriptPubKey = GetMinerScriptPubKey();
+#endif
+    EXPECT_TRUE((bool) scriptPubKey);
+    EXPECT_EQ(expectedScriptPubKey, *scriptPubKey);
+
+    // Valid address with leading whitespace
+    mapArgs["-mineraddress"] = "  t1T8yaLVhNqxA5KJcmiqqFN88e8DNp2PBfF";
+#ifdef ENABLE_WALLET
+    scriptPubKey = GetMinerScriptPubKey(reservekey);
+#else
+    scriptPubKey = GetMinerScriptPubKey();
+#endif
+    EXPECT_TRUE((bool) scriptPubKey);
+    EXPECT_EQ(expectedScriptPubKey, *scriptPubKey);
+
+    // Valid address with trailing whitespace
+    mapArgs["-mineraddress"] = "t1T8yaLVhNqxA5KJcmiqqFN88e8DNp2PBfF  ";
+#ifdef ENABLE_WALLET
+    scriptPubKey = GetMinerScriptPubKey(reservekey);
+#else
+    scriptPubKey = GetMinerScriptPubKey();
+#endif
+    EXPECT_TRUE((bool) scriptPubKey);
+    EXPECT_EQ(expectedScriptPubKey, *scriptPubKey);
+}

src/init.cpp

@@ -11,6 +11,9 @@
 #include "crypto/common.h"
 #include "addrman.h"
 #include "amount.h"
+#ifdef ENABLE_MINING
+#include "base58.h"
+#endif
 #include "checkpoints.h"
 #include "compat/sanity.h"
 #include "consensus/validation.h"
@@ -163,8 +166,12 @@ void Shutdown()
 #ifdef ENABLE_WALLET
     if (pwalletMain)
         pwalletMain->Flush(false);
- #ifdef ENABLE_MINING
+#endif
+#ifdef ENABLE_MINING
+ #ifdef ENABLE_WALLET
     GenerateBitcoins(false, NULL, 0);
+ #else
+    GenerateBitcoins(false, 0);
  #endif
 #endif
     StopNode();
@@ -919,6 +926,17 @@ bool AppInit2(boost::thread_group& threadGroup, CScheduler& scheduler)
 
     fAlerts = GetBoolArg("-alerts", DEFAULT_ALERTS);
 
+#ifdef ENABLE_MINING
+    if (mapArgs.count("-mineraddress")) {
+        CBitcoinAddress addr;
+        if (!addr.SetString(mapArgs["-mineraddress"])) {
+            return InitError(strprintf(
+                _("Invalid address for -mineraddress=<addr>: '%s' (must be a transparent address)"),
+                mapArgs["-mineraddress"]));
+        }
+    }
+#endif
+
     // ********************************************************* Step 4: application initialization: dir lock, daemonize, pidfile, debug log
 
     // Initialize libsodium
@@ -1502,10 +1520,14 @@ bool AppInit2(boost::thread_group& threadGroup, CScheduler& scheduler)
                                          boost::ref(cs_main), boost::cref(pindexBestHeader), nPowTargetSpacing);
     scheduler.scheduleEvery(f, nPowTargetSpacing);
 
-#if defined(ENABLE_WALLET) && defined(ENABLE_MINING)
+#ifdef ENABLE_MINING
     // Generate coins in the background
-    if (pwalletMain)
+ #ifdef ENABLE_WALLET
+    if (pwalletMain || !GetArg("-mineraddress", "").empty())
         GenerateBitcoins(GetBoolArg("-gen", false), pwalletMain, GetArg("-genproclimit", 1));
+ #else
+    GenerateBitcoins(GetBoolArg("-gen", false), GetArg("-genproclimit", 1));
+ #endif
 #endif
 
     // ********************************************************* Step 11: finished

src/miner.cpp

@@ -4,14 +4,18 @@
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
 #include "miner.h"
-#if defined(ENABLE_WALLET) && defined(ENABLE_MINING)
+#ifdef ENABLE_MINING
 #include "pow/tromp/equi_miner.h"
 #endif
 
 #include "amount.h"
+#include "base58.h"
 #include "chainparams.h"
 #include "consensus/consensus.h"
 #include "consensus/validation.h"
+#ifdef ENABLE_MINING
+#include "crypto/equihash.h"
+#endif
 #include "hash.h"
 #include "main.h"
 #include "metrics.h"
@@ -20,20 +24,20 @@
 #include "primitives/transaction.h"
 #include "random.h"
 #include "timedata.h"
+#include "ui_interface.h"
 #include "util.h"
 #include "utilmoneystr.h"
 #ifdef ENABLE_WALLET
- #ifdef ENABLE_MINING
-#include "crypto/equihash.h"
- #endif
 #include "wallet/wallet.h"
-#include <functional>
 #endif
 
 #include "sodium.h"
 
 #include <boost/thread.hpp>
 #include <boost/tuple/tuple.hpp>
+#ifdef ENABLE_MINING
+#include <functional>
+#endif
 #include <mutex>
 
 using namespace std;
@@ -402,24 +406,59 @@ void IncrementExtraNonce(CBlock* pblock, CBlockIndex* pindexPrev, unsigned int&
     pblock->hashMerkleRoot = pblock->BuildMerkleTree();
 }
 
-#ifdef ENABLE_WALLET
 //////////////////////////////////////////////////////////////////////////////
 //
 // Internal miner
 //
 
+#ifdef ENABLE_WALLET
+boost::optional<CScript> GetMinerScriptPubKey(CReserveKey& reservekey)
+#else
+boost::optional<CScript> GetMinerScriptPubKey()
+#endif
+{
+    CKeyID keyID;
+    CBitcoinAddress addr;
+    if (addr.SetString(GetArg("-mineraddress", ""))) {
+        addr.GetKeyID(keyID);
+    } else {
+#ifdef ENABLE_WALLET
+        CPubKey pubkey;
+        if (!reservekey.GetReservedKey(pubkey)) {
+            return boost::optional<CScript>();
+        }
+        keyID = pubkey.GetID();
+#else
+        return boost::optional<CScript>();
+#endif
+    }
+
+    CScript scriptPubKey = CScript() << OP_DUP << OP_HASH160 << ToByteVector(keyID) << OP_EQUALVERIFY << OP_CHECKSIG;
+    return scriptPubKey;
+}
+
+#ifdef ENABLE_WALLET
 CBlockTemplate* CreateNewBlockWithKey(CReserveKey& reservekey)
 {
-    CPubKey pubkey;
+    boost::optional<CScript> scriptPubKey = GetMinerScriptPubKey(reservekey);
-    if (!reservekey.GetReservedKey(pubkey))
+#else
-        return NULL;
+CBlockTemplate* CreateNewBlockWithKey()
+{
+    boost::optional<CScript> scriptPubKey = GetMinerScriptPubKey();
+#endif
 
-    CScript scriptPubKey = CScript() << ToByteVector(pubkey) << OP_CHECKSIG;
+    if (!scriptPubKey) {
-    return CreateNewBlock(scriptPubKey);
+        return NULL;
+    }
+    return CreateNewBlock(*scriptPubKey);
 }
 
 #ifdef ENABLE_MINING
+#ifdef ENABLE_WALLET
 static bool ProcessBlockFound(CBlock* pblock, CWallet& wallet, CReserveKey& reservekey)
+#else
+static bool ProcessBlockFound(CBlock* pblock)
+#endif // ENABLE_WALLET
 {
     LogPrintf("%s\n", pblock->ToString());
     LogPrintf("generated %s\n", FormatMoney(pblock->vtx[0].vout[0].nValue));
@@ -431,14 +470,18 @@ static bool ProcessBlockFound(CBlock* pblock, CWallet& wallet, CReserveKey& rese
             return error("ZcashMiner: generated block is stale");
     }
 
-    // Remove key from key pool
+#ifdef ENABLE_WALLET
-    reservekey.KeepKey();
+    if (GetArg("-mineraddress", "").empty()) {
+        // Remove key from key pool
+        reservekey.KeepKey();
+    }
 
     // Track how many getdata requests this block gets
     {
         LOCK(wallet.cs_wallet);
         wallet.mapRequestCount[pblock->GetHash()] = 0;
     }
+#endif
 
     // Process this block the same as if we had received it from another node
     CValidationState state;
@@ -450,15 +493,23 @@ static bool ProcessBlockFound(CBlock* pblock, CWallet& wallet, CReserveKey& rese
     return true;
 }
 
+#ifdef ENABLE_WALLET
 void static BitcoinMiner(CWallet *pwallet)
+#else
+void static BitcoinMiner()
+#endif
 {
     LogPrintf("ZcashMiner started\n");
     SetThreadPriority(THREAD_PRIORITY_LOWEST);
     RenameThread("zcash-miner");
     const CChainParams& chainparams = Params();
 
-    // Each thread has its own key and counter
+#ifdef ENABLE_WALLET
+    // Each thread has its own key
     CReserveKey reservekey(pwallet);
+#endif
+
+    // Each thread has its own counter
     unsigned int nExtraNonce = 0;
 
     unsigned int n = chainparams.EquihashN();
@@ -500,10 +551,19 @@ void static BitcoinMiner(CWallet *pwallet)
             unsigned int nTransactionsUpdatedLast = mempool.GetTransactionsUpdated();
             CBlockIndex* pindexPrev = chainActive.Tip();
 
+#ifdef ENABLE_WALLET
             unique_ptr<CBlockTemplate> pblocktemplate(CreateNewBlockWithKey(reservekey));
+#else
+            unique_ptr<CBlockTemplate> pblocktemplate(CreateNewBlockWithKey());
+#endif
             if (!pblocktemplate.get())
             {
-                LogPrintf("Error in ZcashMiner: Keypool ran out, please call keypoolrefill before restarting the mining thread\n");
+                if (GetArg("-mineraddress", "").empty()) {
+                    LogPrintf("Error in ZcashMiner: Keypool ran out, please call keypoolrefill before restarting the mining thread\n");
+                } else {
+                    // Should never reach here, because -mineraddress validity is checked in init.cpp
+                    LogPrintf("Error in ZcashMiner: Invalid -mineraddress\n");
+                }
                 return;
             }
             CBlock *pblock = &pblocktemplate->block;
@@ -543,7 +603,11 @@ void static BitcoinMiner(CWallet *pwallet)
                          solver, pblock->nNonce.ToString());
 
                 std::function<bool(std::vector<unsigned char>)> validBlock =
+#ifdef ENABLE_WALLET
                         [&pblock, &hashTarget, &pwallet, &reservekey, &m_cs, &cancelSolver, &chainparams]
+#else
+                        [&pblock, &hashTarget, &m_cs, &cancelSolver, &chainparams]
+#endif
                         (std::vector<unsigned char> soln) {
                     // Write the solution to the hash and compute the result.
                     LogPrint("pow", "- Checking solution against target\n");
@@ -558,7 +622,11 @@ void static BitcoinMiner(CWallet *pwallet)
                     SetThreadPriority(THREAD_PRIORITY_NORMAL);
                     LogPrintf("ZcashMiner:\n");
                     LogPrintf("proof-of-work found  \n  hash: %s  \ntarget: %s\n", pblock->GetHash().GetHex(), hashTarget.GetHex());
+#ifdef ENABLE_WALLET
                     if (ProcessBlockFound(pblock, *pwallet, reservekey)) {
+#else
+                    if (ProcessBlockFound(pblock)) {
+#endif
                         // Ignore chain updates caused by us
                         std::lock_guard<std::mutex> lock{m_cs};
                         cancelSolver = false;
@@ -665,7 +733,11 @@ void static BitcoinMiner(CWallet *pwallet)
     c.disconnect();
 }
 
+#ifdef ENABLE_WALLET
 void GenerateBitcoins(bool fGenerate, CWallet* pwallet, int nThreads)
+#else
+void GenerateBitcoins(bool fGenerate, int nThreads)
+#endif
 {
     static boost::thread_group* minerThreads = NULL;
 
@@ -688,9 +760,13 @@ void GenerateBitcoins(bool fGenerate, CWallet* pwallet, int nThreads)
         return;
 
     minerThreads = new boost::thread_group();
-    for (int i = 0; i < nThreads; i++)
+    for (int i = 0; i < nThreads; i++) {
+#ifdef ENABLE_WALLET
         minerThreads->create_thread(boost::bind(&BitcoinMiner, pwallet));
+#else
+        minerThreads->create_thread(&BitcoinMiner);
+#endif
+    }
 }
 
 #endif // ENABLE_MINING
-#endif // ENABLE_WALLET

src/miner.h

@@ -8,12 +8,15 @@
 
 #include "primitives/block.h"
 
+#include <boost/optional.hpp>
 #include <stdint.h>
 
 class CBlockIndex;
-class CReserveKey;
 class CScript;
+#ifdef ENABLE_WALLET
+class CReserveKey;
 class CWallet;
+#endif
 namespace Consensus { struct Params; };
 
 struct CBlockTemplate
@@ -25,11 +28,21 @@ struct CBlockTemplate
 
 #ifdef ENABLE_MINING
 /** Run the miner threads */
+ #ifdef ENABLE_WALLET
 void GenerateBitcoins(bool fGenerate, CWallet* pwallet, int nThreads);
+ #else
+void GenerateBitcoins(bool fGenerate, int nThreads);
+ #endif
 #endif
 /** Generate a new block, without valid proof-of-work */
 CBlockTemplate* CreateNewBlock(const CScript& scriptPubKeyIn);
+#ifdef ENABLE_WALLET
+boost::optional<CScript> GetMinerScriptPubKey(CReserveKey& reservekey);
 CBlockTemplate* CreateNewBlockWithKey(CReserveKey& reservekey);
+#else
+boost::optional<CScript> GetMinerScriptPubKey();
+CBlockTemplate* CreateNewBlockWithKey();
+#endif
 /** Modify the extranonce in a block */
 void IncrementExtraNonce(CBlock* pblock, CBlockIndex* pindexPrev, unsigned int& nExtraNonce);
 void UpdateTime(CBlockHeader* pblock, const Consensus::Params& consensusParams, const CBlockIndex* pindexPrev);

src/rpcmining.cpp

@@ -8,7 +8,9 @@
 #include "consensus/consensus.h"
 #include "consensus/validation.h"
 #include "core_io.h"
+#ifdef ENABLE_MINING
 #include "crypto/equihash.h"
+#endif
 #include "init.h"
 #include "main.h"
 #include "metrics.h"
@@ -137,7 +139,7 @@ Value getnetworkhashps(const Array& params, bool fHelp)
     return GetNetworkHashPS(params.size() > 0 ? params[0].get_int() : 120, params.size() > 1 ? params[1].get_int() : -1);
 }
 
-#if defined(ENABLE_WALLET) && defined(ENABLE_MINING)
+#ifdef ENABLE_MINING
 Value getgenerate(const Array& params, bool fHelp)
 {
     if (fHelp || params.size() != 0)
@@ -173,8 +175,15 @@ Value generate(const Array& params, bool fHelp)
             + HelpExampleCli("generate", "11")
         );
 
-    if (pwalletMain == NULL)
+    if (GetArg("-mineraddress", "").empty()) {
-        throw JSONRPCError(RPC_METHOD_NOT_FOUND, "Method not found (disabled)");
+#ifdef ENABLE_WALLET
+        if (!pwalletMain) {
+            throw JSONRPCError(RPC_METHOD_NOT_FOUND, "Wallet disabled and -mineraddress not set");
+        }
+#else
+        throw JSONRPCError(RPC_METHOD_NOT_FOUND, "zcashd compiled without wallet and -mineraddress not set");
+#endif
+    }
     if (!Params().MineBlocksOnDemand())
         throw JSONRPCError(RPC_METHOD_NOT_FOUND, "This method can only be used on regtest");
 
@@ -182,7 +191,9 @@ Value generate(const Array& params, bool fHelp)
     int nHeightEnd = 0;
     int nHeight = 0;
     int nGenerate = params[0].get_int();
+#ifdef ENABLE_WALLET
     CReserveKey reservekey(pwalletMain);
+#endif
 
     {   // Don't keep cs_main locked
         LOCK(cs_main);
@@ -196,7 +207,11 @@ Value generate(const Array& params, bool fHelp)
     unsigned int k = Params().EquihashK();
     while (nHeight < nHeightEnd)
     {
+#ifdef ENABLE_WALLET
         unique_ptr<CBlockTemplate> pblocktemplate(CreateNewBlockWithKey(reservekey));
+#else
+        unique_ptr<CBlockTemplate> pblocktemplate(CreateNewBlockWithKey());
+#endif
         if (!pblocktemplate.get())
             throw JSONRPCError(RPC_INTERNAL_ERROR, "Wallet keypool empty");
         CBlock *pblock = &pblocktemplate->block;
@@ -275,8 +290,15 @@ Value setgenerate(const Array& params, bool fHelp)
             + HelpExampleRpc("setgenerate", "true, 1")
         );
 
-    if (pwalletMain == NULL)
+    if (GetArg("-mineraddress", "").empty()) {
-        throw JSONRPCError(RPC_METHOD_NOT_FOUND, "Method not found (disabled)");
+#ifdef ENABLE_WALLET
+        if (!pwalletMain) {
+            throw JSONRPCError(RPC_METHOD_NOT_FOUND, "Wallet disabled and -mineraddress not set");
+        }
+#else
+        throw JSONRPCError(RPC_METHOD_NOT_FOUND, "zcashd compiled without wallet and -mineraddress not set");
+#endif
+    }
     if (Params().MineBlocksOnDemand())
         throw JSONRPCError(RPC_METHOD_NOT_FOUND, "Use the generate method instead of setgenerate on this network");
 
@@ -294,7 +316,11 @@ Value setgenerate(const Array& params, bool fHelp)
 
     mapArgs["-gen"] = (fGenerate ? "1" : "0");
     mapArgs ["-genproclimit"] = itostr(nGenProcLimit);
+#ifdef ENABLE_WALLET
     GenerateBitcoins(fGenerate, pwalletMain, nGenProcLimit);
+#else
+    GenerateBitcoins(fGenerate, nGenProcLimit);
+#endif
 
     return Value::null;
 }
@@ -343,7 +369,7 @@ Value getmininginfo(const Array& params, bool fHelp)
     obj.push_back(Pair("pooledtx",         (uint64_t)mempool.size()));
     obj.push_back(Pair("testnet",          Params().TestnetToBeDeprecatedFieldRPC()));
     obj.push_back(Pair("chain",            Params().NetworkIDString()));
-#if defined(ENABLE_WALLET) && defined(ENABLE_MINING)
+#ifdef ENABLE_MINING
     obj.push_back(Pair("generate",         getgenerate(params, false)));
 #endif
     return obj;
@@ -401,7 +427,6 @@ static Value BIP22ValidationResult(const CValidationState& state)
     return "valid?";
 }
 
-#ifdef ENABLE_WALLET
 Value getblocktemplate(const Array& params, bool fHelp)
 {
     if (fHelp || params.size() > 1)
@@ -466,10 +491,15 @@ Value getblocktemplate(const Array& params, bool fHelp)
 
     LOCK(cs_main);
 
+    // Wallet or miner address is required because we support coinbasetxn
+    if (GetArg("-mineraddress", "").empty()) {
 #ifdef ENABLE_WALLET
-    // Wallet is required because we support coinbasetxn
+        if (!pwalletMain) {
-    if (pwalletMain == NULL) {
+            throw JSONRPCError(RPC_METHOD_NOT_FOUND, "Wallet disabled and -mineraddress not set");
-        throw JSONRPCError(RPC_METHOD_NOT_FOUND, "Method not found (wallet disabled)");
+        }
+#else
+        throw JSONRPCError(RPC_METHOD_NOT_FOUND, "zcashd compiled without wallet and -mineraddress not set");
+#endif
     }
 
     std::string strMode = "template";
@@ -599,8 +629,12 @@ Value getblocktemplate(const Array& params, bool fHelp)
             delete pblocktemplate;
             pblocktemplate = NULL;
         }
+#ifdef ENABLE_WALLET
         CReserveKey reservekey(pwalletMain);
         pblocktemplate = CreateNewBlockWithKey(reservekey);
+#else
+        pblocktemplate = CreateNewBlockWithKey();
+#endif
         if (!pblocktemplate)
             throw JSONRPCError(RPC_OUT_OF_MEMORY, "Out of memory");
 
@@ -695,12 +729,7 @@ Value getblocktemplate(const Array& params, bool fHelp)
     result.push_back(Pair("height", (int64_t)(pindexPrev->nHeight+1)));
 
     return result;
-#else // ENABLE_WALLET
-    // Wallet is required because we support coinbasetxn
-    throw JSONRPCError(RPC_METHOD_NOT_FOUND, "Method not found (wallet support not built)");
-#endif // !ENABLE_WALLET
 }
-#endif
 
 class submitblock_StateCatcher : public CValidationInterface
 {

src/rpcserver.cpp

@@ -313,7 +313,7 @@ static const CRPCCommand vRPCCommands[] =
     { "mining",             "submitblock",            &submitblock,            true  },
     { "mining",             "getblocksubsidy",        &getblocksubsidy,        true  },
 
-#if defined(ENABLE_WALLET) && defined(ENABLE_MINING)
+#ifdef ENABLE_MINING
     /* Coin generation */
     { "generating",         "getgenerate",            &getgenerate,            true  },
     { "generating",         "setgenerate",            &setgenerate,            true  },

src/wallet/wallet.h

@@ -1059,7 +1059,7 @@ public:
     }
 
     void ReturnKey();
-    bool GetReservedKey(CPubKey &pubkey);
+    virtual bool GetReservedKey(CPubKey &pubkey);
     void KeepKey();
 };