detach wallet from miner

src/init.cpp

@@ -156,8 +156,8 @@ void Shutdown()
 #ifdef ENABLE_WALLET
     if (pwalletMain)
         pwalletMain->Flush(false);
-    GenerateBitcoins(false, NULL, 0);
 #endif
+    GenerateBitcoins(false, 0, Params());
     StopNode();
     UnregisterNodeSignals(GetNodeSignals());
 
@@ -370,10 +370,8 @@ std::string HelpMessage(HelpMessageMode mode)
         debugCategories += ", qt";
     strUsage += HelpMessageOpt("-debug=<category>", strprintf(_("Output debugging information (default: %u, supplying <category> is optional)"), 0) + ". " +
         _("If <category> is not supplied or if <category> = 1, output all debugging information.") + _("<category> can be:") + " " + debugCategories + ".");
-#ifdef ENABLE_WALLET
     strUsage += HelpMessageOpt("-gen", strprintf(_("Generate coins (default: %u)"), 0));
     strUsage += HelpMessageOpt("-genproclimit=<n>", strprintf(_("Set the number of threads for coin generation if enabled (-1 = all cores, default: %d)"), 1));
-#endif
     strUsage += HelpMessageOpt("-help-debug", _("Show all debugging options (usage: --help -help-debug)"));
     strUsage += HelpMessageOpt("-logips", strprintf(_("Include IP addresses in debug output (default: %u)"), 0));
     strUsage += HelpMessageOpt("-logtimestamps", strprintf(_("Prepend debug output with timestamp (default: %u)"), 1));
@@ -1439,11 +1437,8 @@ bool AppInit2(boost::thread_group& threadGroup, CScheduler& scheduler)
                                          boost::ref(cs_main), boost::cref(pindexBestHeader), nPowTargetSpacing);
     scheduler.scheduleEvery(f, nPowTargetSpacing);
 
-#ifdef ENABLE_WALLET
     // Generate coins in the background
-    if (pwalletMain)
-        GenerateBitcoins(GetBoolArg("-gen", false), pwalletMain, GetArg("-genproclimit", 1));
-#endif
+    GenerateBitcoins(GetBoolArg("-gen", false), GetArg("-genproclimit", 1), Params());
 
     // ********************************************************* Step 11: finished
 

src/miner.cpp

@@ -17,9 +17,7 @@
 #include "timedata.h"
 #include "util.h"
 #include "utilmoneystr.h"
-#ifdef ENABLE_WALLET
-#include "wallet/wallet.h"
-#endif
+#include "validationinterface.h"
 
 #include <boost/thread.hpp>
 #include <boost/tuple/tuple.hpp>
@@ -362,7 +360,6 @@ void IncrementExtraNonce(CBlock* pblock, CBlockIndex* pindexPrev, unsigned int&
     pblock->hashMerkleRoot = pblock->BuildMerkleTree();
 }
 
-#ifdef ENABLE_WALLET
 //////////////////////////////////////////////////////////////////////////////
 //
 // Internal miner
@@ -401,17 +398,7 @@ bool static ScanHash(const CBlockHeader *pblock, uint32_t& nNonce, uint256 *phas
     }
 }
 
-CBlockTemplate* CreateNewBlockWithKey(CReserveKey& reservekey)
-{
-    CPubKey pubkey;
-    if (!reservekey.GetReservedKey(pubkey))
-        return NULL;
-
-    CScript scriptPubKey = CScript() << ToByteVector(pubkey) << OP_CHECKSIG;
-    return CreateNewBlock(scriptPubKey);
-}
-
-static bool ProcessBlockFound(CBlock* pblock, CWallet& wallet, CReserveKey& reservekey)
+static bool ProcessBlockFound(CBlock* pblock, const CChainParams& chainparams)
 {
     LogPrintf("%s\n", pblock->ToString());
     LogPrintf("generated %s\n", FormatMoney(pblock->vtx[0].vout[0].nValue));
@@ -423,14 +410,8 @@ static bool ProcessBlockFound(CBlock* pblock, CWallet& wallet, CReserveKey& rese
             return error("BitcoinMiner: generated block is stale");
     }
 
-    // Remove key from key pool
-    reservekey.KeepKey();
-
-    // Track how many getdata requests this block gets
-    {
-        LOCK(wallet.cs_wallet);
-        wallet.mapRequestCount[pblock->GetHash()] = 0;
-    }
+    // Inform about the new block
+    GetMainSignals().BlockFound(*pblock);
 
     // Process this block the same as if we had received it from another node
     CValidationState state;
@@ -440,15 +421,12 @@ static bool ProcessBlockFound(CBlock* pblock, CWallet& wallet, CReserveKey& rese
     return true;
 }
 
-void static BitcoinMiner(CWallet *pwallet)
+void static BitcoinMiner(const CChainParams& chainparams, const CScript& coinbaseScript)
 {
     LogPrintf("BitcoinMiner started\n");
     SetThreadPriority(THREAD_PRIORITY_LOWEST);
     RenameThread("bitcoin-miner");
-    const CChainParams& chainparams = Params();
 
-    // Each thread has its own key and counter
-    CReserveKey reservekey(pwallet);
     unsigned int nExtraNonce = 0;
 
     try {
@@ -474,7 +452,7 @@ void static BitcoinMiner(CWallet *pwallet)
             unsigned int nTransactionsUpdatedLast = mempool.GetTransactionsUpdated();
             CBlockIndex* pindexPrev = chainActive.Tip();
 
-            auto_ptr<CBlockTemplate> pblocktemplate(CreateNewBlockWithKey(reservekey));
+            auto_ptr<CBlockTemplate> pblocktemplate(CreateNewBlock(coinbaseScript));
             if (!pblocktemplate.get())
             {
                 LogPrintf("Error in BitcoinMiner: Keypool ran out, please call keypoolrefill before restarting the mining thread\n");
@@ -506,7 +484,7 @@ void static BitcoinMiner(CWallet *pwallet)
                         SetThreadPriority(THREAD_PRIORITY_NORMAL);
                         LogPrintf("BitcoinMiner:\n");
                         LogPrintf("proof-of-work found  \n  hash: %s  \ntarget: %s\n", hash.GetHex(), hashTarget.GetHex());
-                        ProcessBlockFound(pblock, *pwallet, reservekey);
+                        ProcessBlockFound(pblock, chainparams);
                         SetThreadPriority(THREAD_PRIORITY_LOWEST);
 
                         // In regression test mode, stop mining after a block is found.
@@ -551,7 +529,7 @@ void static BitcoinMiner(CWallet *pwallet)
     }
 }
 
-void GenerateBitcoins(bool fGenerate, CWallet* pwallet, int nThreads)
+void GenerateBitcoins(bool fGenerate, int nThreads, const CChainParams& chainparams)
 {
     static boost::thread_group* minerThreads = NULL;
 
@@ -573,9 +551,14 @@ void GenerateBitcoins(bool fGenerate, CWallet* pwallet, int nThreads)
     if (nThreads == 0 || !fGenerate)
         return;
 
+    CScript coinbaseScript;
+    GetMainSignals().ScriptForMining(coinbaseScript);
+
+    //throw an error if no script was provided
+    if (!coinbaseScript.size())
+        throw std::runtime_error("No coinbase script available (mining requires a wallet)");
+
     minerThreads = new boost::thread_group();
     for (int i = 0; i < nThreads; i++)
-        minerThreads->create_thread(boost::bind(&BitcoinMiner, pwallet));
+        minerThreads->create_thread(boost::bind(&BitcoinMiner, boost::cref(chainparams), coinbaseScript));
 }
-
-#endif // ENABLE_WALLET

src/miner.h

@@ -11,6 +11,7 @@
 #include <stdint.h>
 
 class CBlockIndex;
+class CChainParams;
 class CReserveKey;
 class CScript;
 class CWallet;
@@ -24,10 +25,9 @@ struct CBlockTemplate
 };
 
 /** Run the miner threads */
-void GenerateBitcoins(bool fGenerate, CWallet* pwallet, int nThreads);
+void GenerateBitcoins(bool fGenerate, int nThreads, const CChainParams& chainparams);
 /** Generate a new block, without valid proof-of-work */
 CBlockTemplate* CreateNewBlock(const CScript& scriptPubKeyIn);
-CBlockTemplate* CreateNewBlockWithKey(CReserveKey& reservekey);
 /** 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

@@ -16,9 +16,6 @@
 #include "rpcserver.h"
 #include "util.h"
 #include "validationinterface.h"
-#ifdef ENABLE_WALLET
-#include "wallet/wallet.h"
-#endif
 
 #include <stdint.h>
 
@@ -92,7 +89,6 @@ UniValue getnetworkhashps(const UniValue& params, bool fHelp)
     return GetNetworkHashPS(params.size() > 0 ? params[0].get_int() : 120, params.size() > 1 ? params[1].get_int() : -1);
 }
 
-#ifdef ENABLE_WALLET
 UniValue getgenerate(const UniValue& params, bool fHelp)
 {
     if (fHelp || params.size() != 0)
@@ -127,8 +123,6 @@ UniValue generate(const UniValue& params, bool fHelp)
             + HelpExampleCli("generate", "11")
         );
 
-    if (pwalletMain == NULL)
-        throw JSONRPCError(RPC_METHOD_NOT_FOUND, "Method not found (disabled)");
     if (!Params().MineBlocksOnDemand())
         throw JSONRPCError(RPC_METHOD_NOT_FOUND, "This method can only be used on regtest");
 
@@ -136,7 +130,13 @@ UniValue generate(const UniValue& params, bool fHelp)
     int nHeightEnd = 0;
     int nHeight = 0;
     int nGenerate = params[0].get_int();
-    CReserveKey reservekey(pwalletMain);
+
+    CScript coinbaseScript;
+    GetMainSignals().ScriptForMining(coinbaseScript);
+
+    //throw an error if no script was provided
+    if (!coinbaseScript.size())
+        throw JSONRPCError(RPC_INTERNAL_ERROR, "No coinbase script available (mining requires a wallet)");
 
     {   // Don't keep cs_main locked
         LOCK(cs_main);
@@ -148,9 +148,9 @@ UniValue generate(const UniValue& params, bool fHelp)
     UniValue blockHashes(UniValue::VARR);
     while (nHeight < nHeightEnd)
     {
-        auto_ptr<CBlockTemplate> pblocktemplate(CreateNewBlockWithKey(reservekey));
+        auto_ptr<CBlockTemplate> pblocktemplate(CreateNewBlock(coinbaseScript));
         if (!pblocktemplate.get())
-            throw JSONRPCError(RPC_INTERNAL_ERROR, "Wallet keypool empty");
+            throw JSONRPCError(RPC_INTERNAL_ERROR, "Couldn't create new block");
         CBlock *pblock = &pblocktemplate->block;
         {
             LOCK(cs_main);
@@ -170,7 +170,6 @@ UniValue generate(const UniValue& params, bool fHelp)
     return blockHashes;
 }
 
-
 UniValue setgenerate(const UniValue& params, bool fHelp)
 {
     if (fHelp || params.size() < 1 || params.size() > 2)
@@ -193,8 +192,6 @@ UniValue setgenerate(const UniValue& params, bool fHelp)
             + HelpExampleRpc("setgenerate", "true, 1")
         );
 
-    if (pwalletMain == NULL)
-        throw JSONRPCError(RPC_METHOD_NOT_FOUND, "Method not found (disabled)");
     if (Params().MineBlocksOnDemand())
         throw JSONRPCError(RPC_METHOD_NOT_FOUND, "Use the generate method instead of setgenerate on this network");
 
@@ -212,12 +209,10 @@ UniValue setgenerate(const UniValue& params, bool fHelp)
 
     mapArgs["-gen"] = (fGenerate ? "1" : "0");
     mapArgs ["-genproclimit"] = itostr(nGenProcLimit);
-    GenerateBitcoins(fGenerate, pwalletMain, nGenProcLimit);
+    GenerateBitcoins(fGenerate, nGenProcLimit, Params());
 
     return NullUniValue;
 }
-#endif
-
 
 UniValue getmininginfo(const UniValue& params, bool fHelp)
 {
@@ -257,9 +252,7 @@ UniValue getmininginfo(const UniValue& 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()));
-#ifdef ENABLE_WALLET
     obj.push_back(Pair("generate",         getgenerate(params, false)));
-#endif
     return obj;
 }
 

src/rpcserver.cpp

@@ -306,12 +306,10 @@ static const CRPCCommand vRPCCommands[] =
     { "mining",             "prioritisetransaction",  &prioritisetransaction,  true  },
     { "mining",             "submitblock",            &submitblock,            true  },
 
-#ifdef ENABLE_WALLET
     /* Coin generation */
     { "generating",         "getgenerate",            &getgenerate,            true  },
     { "generating",         "setgenerate",            &setgenerate,            true  },
     { "generating",         "generate",               &generate,               true  },
-#endif
 
     /* Raw transactions */
     { "rawtransactions",    "createrawtransaction",   &createrawtransaction,   true  },

src/validationinterface.cpp

@@ -19,9 +19,13 @@ void RegisterValidationInterface(CValidationInterface* pwalletIn) {
     g_signals.Inventory.connect(boost::bind(&CValidationInterface::Inventory, pwalletIn, _1));
     g_signals.Broadcast.connect(boost::bind(&CValidationInterface::ResendWalletTransactions, pwalletIn, _1));
     g_signals.BlockChecked.connect(boost::bind(&CValidationInterface::BlockChecked, pwalletIn, _1, _2));
+    g_signals.ScriptForMining.connect(boost::bind(&CValidationInterface::GetScriptForMining, pwalletIn, _1));
+    g_signals.BlockFound.connect(boost::bind(&CValidationInterface::UpdateRequestCount, pwalletIn, _1));
 }
 
 void UnregisterValidationInterface(CValidationInterface* pwalletIn) {
+    g_signals.BlockFound.disconnect(boost::bind(&CValidationInterface::UpdateRequestCount, pwalletIn, _1));
+    g_signals.ScriptForMining.disconnect(boost::bind(&CValidationInterface::GetScriptForMining, pwalletIn, _1));
     g_signals.BlockChecked.disconnect(boost::bind(&CValidationInterface::BlockChecked, pwalletIn, _1, _2));
     g_signals.Broadcast.disconnect(boost::bind(&CValidationInterface::ResendWalletTransactions, pwalletIn, _1));
     g_signals.Inventory.disconnect(boost::bind(&CValidationInterface::Inventory, pwalletIn, _1));
@@ -31,6 +35,8 @@ void UnregisterValidationInterface(CValidationInterface* pwalletIn) {
 }
 
 void UnregisterAllValidationInterfaces() {
+    g_signals.BlockFound.disconnect_all_slots();
+    g_signals.ScriptForMining.disconnect_all_slots();
     g_signals.BlockChecked.disconnect_all_slots();
     g_signals.Broadcast.disconnect_all_slots();
     g_signals.Inventory.disconnect_all_slots();

src/validationinterface.h

@@ -10,6 +10,7 @@
 
 class CBlock;
 struct CBlockLocator;
+class CScript;
 class CTransaction;
 class CValidationInterface;
 class CValidationState;
@@ -34,6 +35,8 @@ protected:
     virtual void Inventory(const uint256 &hash) {}
     virtual void ResendWalletTransactions(int64_t nBestBlockTime) {}
     virtual void BlockChecked(const CBlock&, const CValidationState&) {}
+    virtual void GetScriptForMining(CScript &script) {};
+    virtual void UpdateRequestCount(const CBlock&) {};
     friend void ::RegisterValidationInterface(CValidationInterface*);
     friend void ::UnregisterValidationInterface(CValidationInterface*);
     friend void ::UnregisterAllValidationInterfaces();
@@ -52,6 +55,10 @@ struct CMainSignals {
     boost::signals2::signal<void (int64_t nBestBlockTime)> Broadcast;
     /** Notifies listeners of a block validation result */
     boost::signals2::signal<void (const CBlock&, const CValidationState&)> BlockChecked;
+    /** Notifies listeners that a key for mining is required (coinbase) */
+    boost::signals2::signal<void (CScript &script)> ScriptForMining;
+    /** Notifies listeners that a block has been successfully mined */
+    boost::signals2::signal<void (const CBlock&)> BlockFound;
 };
 
 CMainSignals& GetMainSignals();

src/wallet/wallet.cpp

@@ -2583,6 +2583,17 @@ void CWallet::UpdatedTransaction(const uint256 &hashTx)
     }
 }
 
+void CWallet::GetScriptForMining(CScript &script)
+{
+    CReserveKey reservekey(this);
+    reservekey.KeepKey();
+    
+    CPubKey pubkey;
+    if (!reservekey.GetReservedKey(pubkey))
+        return;
+    script = CScript() << ToByteVector(pubkey) << OP_CHECKSIG;
+}
+
 void CWallet::LockCoin(COutPoint& output)
 {
     AssertLockHeld(cs_wallet); // setLockedCoins

src/wallet/wallet.h

@@ -680,6 +680,13 @@ public:
         }
     }
 
+    void GetScriptForMining(CScript &script);
+    void UpdateRequestCount(const CBlock& block)
+    {
+        LOCK(cs_wallet);
+        mapRequestCount[block.GetHash()] = 0;
+    };
+    
     unsigned int GetKeyPoolSize()
     {
         AssertLockHeld(cs_wallet); // setKeyPool