Chainparams: Explicit CChainParams arg for miner:

-BitcoinMiner
-CreateNewBlock
-GenerateBitcoins
-ProcessBlockFound

src/init.cpp

@@ -1576,7 +1576,7 @@ bool AppInit2(boost::thread_group& threadGroup, CScheduler& scheduler)
     scheduler.scheduleEvery(f, nPowTargetSpacing);
 
     // Generate coins in the background
-    GenerateBitcoins(GetBoolArg("-gen", false), GetArg("-genproclimit", DEFAULT_GENERATE_THREADS), Params());
+    GenerateBitcoins(GetBoolArg("-gen", false), GetArg("-genproclimit", DEFAULT_GENERATE_THREADS), chainparams);
 
     // ********************************************************* Step 12: finished
 

src/miner.cpp

@@ -99,9 +99,8 @@ int64_t UpdateTime(CBlockHeader* pblock, const Consensus::Params& consensusParam
     return nNewTime - nOldTime;
 }
 
-CBlockTemplate* CreateNewBlock(const CScript& scriptPubKeyIn)
+CBlockTemplate* CreateNewBlock(const CChainParams& chainparams, const CScript& scriptPubKeyIn)
 {
-    const CChainParams& chainparams = Params();
     // Create new block
     auto_ptr<CBlockTemplate> pblocktemplate(new CBlockTemplate());
     if(!pblocktemplate.get())
@@ -110,7 +109,7 @@ CBlockTemplate* CreateNewBlock(const CScript& scriptPubKeyIn)
 
     // -regtest only: allow overriding block.nVersion with
     // -blockversion=N to test forking scenarios
-    if (Params().MineBlocksOnDemand())
+    if (chainparams.MineBlocksOnDemand())
         pblock->nVersion = GetArg("-blockversion", pblock->nVersion);
 
     // Create coinbase tx
@@ -345,8 +344,8 @@ CBlockTemplate* CreateNewBlock(const CScript& scriptPubKeyIn)
 
         // Fill in header
         pblock->hashPrevBlock  = pindexPrev->GetBlockHash();
-        UpdateTime(pblock, Params().GetConsensus(), pindexPrev);
-        pblock->nBits          = GetNextWorkRequired(pindexPrev, pblock, Params().GetConsensus());
+        UpdateTime(pblock, chainparams.GetConsensus(), pindexPrev);
+        pblock->nBits          = GetNextWorkRequired(pindexPrev, pblock, chainparams.GetConsensus());
         pblock->nNonce         = 0;
         pblocktemplate->vTxSigOps[0] = GetLegacySigOpCount(pblock->vtx[0]);
 
@@ -478,7 +477,7 @@ void static BitcoinMiner(const CChainParams& chainparams)
             unsigned int nTransactionsUpdatedLast = mempool.GetTransactionsUpdated();
             CBlockIndex* pindexPrev = chainActive.Tip();
 
-            auto_ptr<CBlockTemplate> pblocktemplate(CreateNewBlock(coinbaseScript->reserveScript));
+            auto_ptr<CBlockTemplate> pblocktemplate(CreateNewBlock(chainparams, coinbaseScript->reserveScript));
             if (!pblocktemplate.get())
             {
                 LogPrintf("Error in BitcoinMiner: Keypool ran out, please call keypoolrefill before restarting the mining thread\n");

src/miner.h

@@ -29,7 +29,7 @@ struct CBlockTemplate
 /** Run the miner threads */
 void GenerateBitcoins(bool fGenerate, int nThreads, const CChainParams& chainparams);
 /** Generate a new block, without valid proof-of-work */
-CBlockTemplate* CreateNewBlock(const CScript& scriptPubKeyIn);
+CBlockTemplate* CreateNewBlock(const CChainParams& chainparams, const CScript& scriptPubKeyIn);
 /** Modify the extranonce in a block */
 void IncrementExtraNonce(CBlock* pblock, const CBlockIndex* pindexPrev, unsigned int& nExtraNonce);
 int64_t UpdateTime(CBlockHeader* pblock, const Consensus::Params& consensusParams, const CBlockIndex* pindexPrev);

src/rpcmining.cpp

@@ -157,7 +157,7 @@ UniValue generate(const UniValue& params, bool fHelp)
     UniValue blockHashes(UniValue::VARR);
     while (nHeight < nHeightEnd)
     {
-        auto_ptr<CBlockTemplate> pblocktemplate(CreateNewBlock(coinbaseScript->reserveScript));
+        auto_ptr<CBlockTemplate> pblocktemplate(CreateNewBlock(Params(), coinbaseScript->reserveScript));
         if (!pblocktemplate.get())
             throw JSONRPCError(RPC_INTERNAL_ERROR, "Couldn't create new block");
         CBlock *pblock = &pblocktemplate->block;
@@ -510,7 +510,7 @@ UniValue getblocktemplate(const UniValue& params, bool fHelp)
             pblocktemplate = NULL;
         }
         CScript scriptDummy = CScript() << OP_TRUE;
-        pblocktemplate = CreateNewBlock(scriptDummy);
+        pblocktemplate = CreateNewBlock(Params(), scriptDummy);
         if (!pblocktemplate)
             throw JSONRPCError(RPC_OUT_OF_MEMORY, "Out of memory");
 

src/test/miner_tests.cpp

@@ -70,7 +70,7 @@ BOOST_AUTO_TEST_CASE(CreateNewBlock_validity)
     fCheckpointsEnabled = false;
 
     // Simple block creation, nothing special yet:
-    BOOST_CHECK(pblocktemplate = CreateNewBlock(scriptPubKey));
+    BOOST_CHECK(pblocktemplate = CreateNewBlock(chainparams, scriptPubKey));
 
     // We can't make transactions until we have inputs
     // Therefore, load 100 blocks :)
@@ -99,7 +99,7 @@ BOOST_AUTO_TEST_CASE(CreateNewBlock_validity)
     delete pblocktemplate;
 
     // Just to make sure we can still make simple blocks
-    BOOST_CHECK(pblocktemplate = CreateNewBlock(scriptPubKey));
+    BOOST_CHECK(pblocktemplate = CreateNewBlock(chainparams, scriptPubKey));
     delete pblocktemplate;
 
     // block sigops > limit: 1000 CHECKMULTISIG + 1
@@ -117,7 +117,7 @@ BOOST_AUTO_TEST_CASE(CreateNewBlock_validity)
         mempool.addUnchecked(hash, CTxMemPoolEntry(tx, 11, GetTime(), 111.0, 11));
         tx.vin[0].prevout.hash = hash;
     }
-    BOOST_CHECK(pblocktemplate = CreateNewBlock(scriptPubKey));
+    BOOST_CHECK(pblocktemplate = CreateNewBlock(chainparams, scriptPubKey));
     delete pblocktemplate;
     mempool.clear();
 
@@ -137,14 +137,14 @@ BOOST_AUTO_TEST_CASE(CreateNewBlock_validity)
         mempool.addUnchecked(hash, CTxMemPoolEntry(tx, 11, GetTime(), 111.0, 11));
         tx.vin[0].prevout.hash = hash;
     }
-    BOOST_CHECK(pblocktemplate = CreateNewBlock(scriptPubKey));
+    BOOST_CHECK(pblocktemplate = CreateNewBlock(chainparams, scriptPubKey));
     delete pblocktemplate;
     mempool.clear();
 
     // orphan in mempool
     hash = tx.GetHash();
     mempool.addUnchecked(hash, CTxMemPoolEntry(tx, 11, GetTime(), 111.0, 11));
-    BOOST_CHECK(pblocktemplate = CreateNewBlock(scriptPubKey));
+    BOOST_CHECK(pblocktemplate = CreateNewBlock(chainparams, scriptPubKey));
     delete pblocktemplate;
     mempool.clear();
 
@@ -162,7 +162,7 @@ BOOST_AUTO_TEST_CASE(CreateNewBlock_validity)
     tx.vout[0].nValue = 5900000000LL;
     hash = tx.GetHash();
     mempool.addUnchecked(hash, CTxMemPoolEntry(tx, 11, GetTime(), 111.0, 11));
-    BOOST_CHECK(pblocktemplate = CreateNewBlock(scriptPubKey));
+    BOOST_CHECK(pblocktemplate = CreateNewBlock(chainparams, scriptPubKey));
     delete pblocktemplate;
     mempool.clear();
 
@@ -173,7 +173,7 @@ BOOST_AUTO_TEST_CASE(CreateNewBlock_validity)
     tx.vout[0].nValue = 0;
     hash = tx.GetHash();
     mempool.addUnchecked(hash, CTxMemPoolEntry(tx, 11, GetTime(), 111.0, 11));
-    BOOST_CHECK(pblocktemplate = CreateNewBlock(scriptPubKey));
+    BOOST_CHECK(pblocktemplate = CreateNewBlock(chainparams, scriptPubKey));
     delete pblocktemplate;
     mempool.clear();
 
@@ -191,7 +191,7 @@ BOOST_AUTO_TEST_CASE(CreateNewBlock_validity)
     tx.vout[0].nValue -= 1000000;
     hash = tx.GetHash();
     mempool.addUnchecked(hash, CTxMemPoolEntry(tx, 11, GetTime(), 111.0, 11));
-    BOOST_CHECK(pblocktemplate = CreateNewBlock(scriptPubKey));
+    BOOST_CHECK(pblocktemplate = CreateNewBlock(chainparams, scriptPubKey));
     delete pblocktemplate;
     mempool.clear();
 
@@ -205,17 +205,17 @@ BOOST_AUTO_TEST_CASE(CreateNewBlock_validity)
     tx.vout[0].scriptPubKey = CScript() << OP_2;
     hash = tx.GetHash();
     mempool.addUnchecked(hash, CTxMemPoolEntry(tx, 11, GetTime(), 111.0, 11));
-    BOOST_CHECK(pblocktemplate = CreateNewBlock(scriptPubKey));
+    BOOST_CHECK(pblocktemplate = CreateNewBlock(chainparams, scriptPubKey));
     delete pblocktemplate;
     mempool.clear();
 
     // subsidy changing
     int nHeight = chainActive.Height();
     chainActive.Tip()->nHeight = 209999;
-    BOOST_CHECK(pblocktemplate = CreateNewBlock(scriptPubKey));
+    BOOST_CHECK(pblocktemplate = CreateNewBlock(chainparams, scriptPubKey));
     delete pblocktemplate;
     chainActive.Tip()->nHeight = 210000;
-    BOOST_CHECK(pblocktemplate = CreateNewBlock(scriptPubKey));
+    BOOST_CHECK(pblocktemplate = CreateNewBlock(chainparams, scriptPubKey));
     delete pblocktemplate;
     chainActive.Tip()->nHeight = nHeight;
 
@@ -247,7 +247,7 @@ BOOST_AUTO_TEST_CASE(CreateNewBlock_validity)
     mempool.addUnchecked(hash, CTxMemPoolEntry(tx2, 11, GetTime(), 111.0, 11));
     BOOST_CHECK(!CheckFinalTx(tx2, LOCKTIME_MEDIAN_TIME_PAST));
 
-    BOOST_CHECK(pblocktemplate = CreateNewBlock(scriptPubKey));
+    BOOST_CHECK(pblocktemplate = CreateNewBlock(chainparams, scriptPubKey));
 
     // Neither tx should have make it into the template.
     BOOST_CHECK_EQUAL(pblocktemplate->block.vtx.size(), 1);
@@ -262,7 +262,7 @@ BOOST_AUTO_TEST_CASE(CreateNewBlock_validity)
     //BOOST_CHECK(CheckFinalTx(tx));
     //BOOST_CHECK(CheckFinalTx(tx2));
 
-    BOOST_CHECK(pblocktemplate = CreateNewBlock(scriptPubKey));
+    BOOST_CHECK(pblocktemplate = CreateNewBlock(chainparams, scriptPubKey));
     BOOST_CHECK_EQUAL(pblocktemplate->block.vtx.size(), 2);
     delete pblocktemplate;
 

src/test/test_bitcoin.cpp

@@ -115,7 +115,7 @@ CBlock
 TestChain100Setup::CreateAndProcessBlock(const std::vector<CMutableTransaction>& txns, const CScript& scriptPubKey)
 {
     const CChainParams& chainparams = Params();
-    CBlockTemplate *pblocktemplate = CreateNewBlock(scriptPubKey);
+    CBlockTemplate *pblocktemplate = CreateNewBlock(chainparams, scriptPubKey);
     CBlock& block = pblocktemplate->block;
 
     // Replace mempool-selected txns with just coinbase plus passed-in txns: