Globals: Remove a bunch of Params() calls from main.cpp:

1) Chainparams: Explicit CChainParams arg for main:

-AcceptBlock
-AcceptBlockHeader
-ActivateBestChain
-ConnectTip
-InitBlockIndex
-LoadExternalBlockFile
-VerifyDB parametric constructor

2) Also pickup more Params()\. in main.cpp

3) Pass nPruneAfterHeight explicitly to new FindFilesToPrune() in main.cpp

5 files changed, 44 insertions, 49 deletions

diff --git a/src/init.cpp b/src/init.cpp
index cd84e7747a..3b82dfdc7c 100644
--- a/src/init.cpp
+++ b/src/init.cpp
@@ -588,6 +588,7 @@ void CleanupBlockRevFiles()
 
 void ThreadImport(std::vector<boost::filesystem::path> vImportFiles)
 {
+    const CChainParams& chainparams = Params();
     RenameThread("bitcoin-loadblk");
     // -reindex
     if (fReindex) {
@@ -601,14 +602,14 @@ void ThreadImport(std::vector<boost::filesystem::path> vImportFiles)
             if (!file)
                 break; // This error is logged in OpenBlockFile
             LogPrintf("Reindexing block file blk%05u.dat...\n", (unsigned int)nFile);
-            LoadExternalBlockFile(file, &pos);
+            LoadExternalBlockFile(chainparams, file, &pos);
             nFile++;
         }
         pblocktree->WriteReindexing(false);
         fReindex = false;
         LogPrintf("Reindexing finished\n");
         // To avoid ending up in a situation without genesis block, re-try initializing (no-op if reindexing worked):
-        InitBlockIndex();
+        InitBlockIndex(chainparams);
     }
 
     // hardcoded $DATADIR/bootstrap.dat
@@ -619,7 +620,7 @@ void ThreadImport(std::vector<boost::filesystem::path> vImportFiles)
             CImportingNow imp;
             boost::filesystem::path pathBootstrapOld = GetDataDir() / "bootstrap.dat.old";
             LogPrintf("Importing bootstrap.dat...\n");
-            LoadExternalBlockFile(file);
+            LoadExternalBlockFile(chainparams, file);
             RenameOver(pathBootstrap, pathBootstrapOld);
         } else {
             LogPrintf("Warning: Could not open bootstrap file %s\n", pathBootstrap.string());
@@ -632,7 +633,7 @@ void ThreadImport(std::vector<boost::filesystem::path> vImportFiles)
         if (file) {
             CImportingNow imp;
             LogPrintf("Importing blocks file %s...\n", path.string());
-            LoadExternalBlockFile(file);
+            LoadExternalBlockFile(chainparams, file);
         } else {
             LogPrintf("Warning: Could not open blocks file %s\n", path.string());
         }
@@ -1297,7 +1298,7 @@ bool AppInit2(boost::thread_group& threadGroup, CScheduler& scheduler)
                     return InitError(_("Incorrect or no genesis block found. Wrong datadir for network?"));
 
                 // Initialize the block index (no-op if non-empty database was already loaded)
-                if (!InitBlockIndex()) {
+                if (!InitBlockIndex(chainparams)) {
                     strLoadError = _("Error initializing block database");
                     break;
                 }
@@ -1332,7 +1333,7 @@ bool AppInit2(boost::thread_group& threadGroup, CScheduler& scheduler)
                     }
                 }
 
-                if (!CVerifyDB().VerifyDB(pcoinsdbview, GetArg("-checklevel", DEFAULT_CHECKLEVEL),
+                if (!CVerifyDB().VerifyDB(chainparams, pcoinsdbview, GetArg("-checklevel", DEFAULT_CHECKLEVEL),
                               GetArg("-checkblocks", DEFAULT_CHECKBLOCKS))) {
                     strLoadError = _("Corrupted block database detected");
                     break;
@@ -1556,7 +1557,7 @@ bool AppInit2(boost::thread_group& threadGroup, CScheduler& scheduler)
     uiInterface.InitMessage(_("Activating best chain..."));
     // scan for better chains in the block chain database, that are not yet connected in the active best chain
     CValidationState state;
-    if (!ActivateBestChain(state))
+    if (!ActivateBestChain(state, chainparams))
         strErrors << "Failed to connect best block";
 
     std::vector<boost::filesystem::path> vImportFiles;
diff --git a/src/main.cpp b/src/main.cpp
index a1f326fb13..4d88078f41 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1939,6 +1939,7 @@ enum FlushStateMode {
  * or always and in all cases if we're in prune mode and are deleting files.
  */
 bool static FlushStateToDisk(CValidationState &state, FlushStateMode mode) {
+    const CChainParams& chainparams = Params();
     LOCK2(cs_main, cs_LastBlockFile);
     static int64_t nLastWrite = 0;
     static int64_t nLastFlush = 0;
@@ -1947,7 +1948,7 @@ bool static FlushStateToDisk(CValidationState &state, FlushStateMode mode) {
     bool fFlushForPrune = false;
     try {
     if (fPruneMode && fCheckForPruning && !fReindex) {
-        FindFilesToPrune(setFilesToPrune);
+        FindFilesToPrune(setFilesToPrune, chainparams.PruneAfterHeight());
         fCheckForPruning = false;
         if (!setFilesToPrune.empty()) {
             fFlushForPrune = true;
@@ -2147,8 +2148,8 @@ static int64_t nTimePostConnect = 0;
  * Connect a new block to chainActive. pblock is either NULL or a pointer to a CBlock
  * corresponding to pindexNew, to bypass loading it again from disk.
  */
-bool static ConnectTip(CValidationState &state, CBlockIndex *pindexNew, const CBlock *pblock) {
-    const CChainParams& chainparams = Params();
+bool static ConnectTip(CValidationState& state, const CChainParams& chainparams, CBlockIndex* pindexNew, const CBlock* pblock)
+{
     assert(pindexNew->pprev == chainActive.Tip());
     mempool.check(pcoinsTip);
     // Read block from disk.
@@ -2280,8 +2281,8 @@ static void PruneBlockIndexCandidates() {
  * Try to make some progress towards making pindexMostWork the active block.
  * pblock is either NULL or a pointer to a CBlock corresponding to pindexMostWork.
  */
-static bool ActivateBestChainStep(CValidationState &state, CBlockIndex *pindexMostWork, const CBlock *pblock) {
-    const CChainParams& chainparams = Params();
+static bool ActivateBestChainStep(CValidationState& state, const CChainParams& chainparams, CBlockIndex* pindexMostWork, const CBlock* pblock)
+{
     AssertLockHeld(cs_main);
     bool fInvalidFound = false;
     const CBlockIndex *pindexOldTip = chainActive.Tip();
@@ -2314,7 +2315,7 @@ static bool ActivateBestChainStep(CValidationState &state, CBlockIndex *pindexMo
 
     // Connect new blocks.
     BOOST_REVERSE_FOREACH(CBlockIndex *pindexConnect, vpindexToConnect) {
-        if (!ConnectTip(state, pindexConnect, pindexConnect == pindexMostWork ? pblock : NULL)) {
+        if (!ConnectTip(state, chainparams, pindexConnect, pindexConnect == pindexMostWork ? pblock : NULL)) {
             if (state.IsInvalid()) {
                 // The block violates a consensus rule.
                 if (!state.CorruptionPossible())
@@ -2355,10 +2356,10 @@ static bool ActivateBestChainStep(CValidationState &state, CBlockIndex *pindexMo
  * or an activated best chain. pblock is either NULL or a pointer to a block
  * that is already loaded (to avoid loading it again from disk).
  */
-bool ActivateBestChain(CValidationState &state, const CBlock *pblock) {
+bool ActivateBestChain(CValidationState& state, const CChainParams& chainparams, const CBlock* pblock)
+{
     CBlockIndex *pindexNewTip = NULL;
     CBlockIndex *pindexMostWork = NULL;
-    const CChainParams& chainparams = Params();
     do {
         boost::this_thread::interruption_point();
 
@@ -2371,7 +2372,7 @@ bool ActivateBestChain(CValidationState &state, const CBlock *pblock) {
             if (pindexMostWork == NULL || pindexMostWork == chainActive.Tip())
                 return true;
 
-            if (!ActivateBestChainStep(state, pindexMostWork, pblock && pblock->GetHash() == pindexMostWork->GetBlockHash() ? pblock : NULL))
+            if (!ActivateBestChainStep(state, chainparams, pindexMostWork, pblock && pblock->GetHash() == pindexMostWork->GetBlockHash() ? pblock : NULL))
                 return false;
 
             pindexNewTip = chainActive.Tip();
@@ -2850,9 +2851,9 @@ static bool AcceptBlockHeader(const CBlockHeader& block, CValidationState& state
     return true;
 }
 
-bool AcceptBlock(const CBlock& block, CValidationState& state, CBlockIndex** ppindex, bool fRequested, CDiskBlockPos* dbp)
+/** Store block on disk. If dbp is non-NULL, the file is known to already reside on disk */
+static bool AcceptBlock(const CBlock& block, CValidationState& state, const CChainParams& chainparams, CBlockIndex** ppindex, bool fRequested, CDiskBlockPos* dbp)
 {
-    const CChainParams& chainparams = Params();
     AssertLockHeld(cs_main);
 
     CBlockIndex *&pindex = *ppindex;
@@ -2942,7 +2943,7 @@ bool ProcessNewBlock(CValidationState& state, const CChainParams& chainparams, c
 
         // Store to disk
         CBlockIndex *pindex = NULL;
-        bool ret = AcceptBlock(*pblock, state, &pindex, fRequested, dbp);
+        bool ret = AcceptBlock(*pblock, state, chainparams, &pindex, fRequested, dbp);
         if (pindex && pfrom) {
             mapBlockSource[pindex->GetBlockHash()] = pfrom->GetId();
         }
@@ -2951,7 +2952,7 @@ bool ProcessNewBlock(CValidationState& state, const CChainParams& chainparams, c
             return error("%s: AcceptBlock FAILED", __func__);
     }
 
-    if (!ActivateBestChain(state, pblock))
+    if (!ActivateBestChain(state, chainparams, pblock))
         return error("%s: ActivateBestChain failed", __func__);
 
     return true;
@@ -3041,13 +3042,13 @@ void UnlinkPrunedFiles(std::set<int>& setFilesToPrune)
 }
 
 /* Calculate the block/rev files that should be deleted to remain under target*/
-void FindFilesToPrune(std::set<int>& setFilesToPrune)
+void FindFilesToPrune(std::set<int>& setFilesToPrune, uint64_t nPruneAfterHeight)
 {
     LOCK2(cs_main, cs_LastBlockFile);
     if (chainActive.Tip() == NULL || nPruneTarget == 0) {
         return;
     }
-    if (chainActive.Tip()->nHeight <= Params().PruneAfterHeight()) {
+    if (chainActive.Tip()->nHeight <= nPruneAfterHeight) {
         return;
     }
 
@@ -3275,9 +3276,8 @@ CVerifyDB::~CVerifyDB()
     uiInterface.ShowProgress("", 100);
 }
 
-bool CVerifyDB::VerifyDB(CCoinsView *coinsview, int nCheckLevel, int nCheckDepth)
+bool CVerifyDB::VerifyDB(const CChainParams& chainparams, CCoinsView *coinsview, int nCheckLevel, int nCheckDepth)
 {
-    const CChainParams& chainparams = Params();
     LOCK(cs_main);
     if (chainActive.Tip() == NULL || chainActive.Tip()->pprev == NULL)
         return true;
@@ -3393,9 +3393,8 @@ bool LoadBlockIndex()
     return true;
 }
 
-
-bool InitBlockIndex() {
-    const CChainParams& chainparams = Params();
+bool InitBlockIndex(const CChainParams& chainparams) 
+{
     LOCK(cs_main);
 
     // Initialize global variables that cannot be constructed at startup.
@@ -3413,7 +3412,7 @@ bool InitBlockIndex() {
     // Only add the genesis block if not reindexing (in which case we reuse the one already on disk)
     if (!fReindex) {
         try {
-            CBlock &block = const_cast<CBlock&>(Params().GenesisBlock());
+            CBlock &block = const_cast<CBlock&>(chainparams.GenesisBlock());
             // Start new block file
             unsigned int nBlockSize = ::GetSerializeSize(block, SER_DISK, CLIENT_VERSION);
             CDiskBlockPos blockPos;
@@ -3425,7 +3424,7 @@ bool InitBlockIndex() {
             CBlockIndex *pindex = AddToBlockIndex(block);
             if (!ReceivedBlockTransactions(block, state, pindex, blockPos))
                 return error("LoadBlockIndex(): genesis block not accepted");
-            if (!ActivateBestChain(state, &block))
+            if (!ActivateBestChain(state, chainparams, &block))
                 return error("LoadBlockIndex(): genesis block cannot be activated");
             // Force a chainstate write so that when we VerifyDB in a moment, it doesn't check stale data
             return FlushStateToDisk(state, FLUSH_STATE_ALWAYS);
@@ -3437,11 +3436,8 @@ bool InitBlockIndex() {
     return true;
 }
 
-
-
-bool LoadExternalBlockFile(FILE* fileIn, CDiskBlockPos *dbp)
+bool LoadExternalBlockFile(const CChainParams& chainparams, FILE* fileIn, CDiskBlockPos *dbp)
 {
-    const CChainParams& chainparams = Params();
     // Map of disk positions for blocks with unknown parent (only used for reindex)
     static std::multimap<uint256, CDiskBlockPos> mapBlocksUnknownParent;
     int64_t nStart = GetTimeMillis();
@@ -3461,10 +3457,10 @@ bool LoadExternalBlockFile(FILE* fileIn, CDiskBlockPos *dbp)
             try {
                 // locate a header
                 unsigned char buf[MESSAGE_START_SIZE];
-                blkdat.FindByte(Params().MessageStart()[0]);
+                blkdat.FindByte(chainparams.MessageStart()[0]);
                 nRewind = blkdat.GetPos()+1;
                 blkdat >> FLATDATA(buf);
-                if (memcmp(buf, Params().MessageStart(), MESSAGE_START_SIZE))
+                if (memcmp(buf, chainparams.MessageStart(), MESSAGE_START_SIZE))
                     continue;
                 // read size
                 blkdat >> nSize;
@@ -3858,7 +3854,7 @@ void static ProcessGetData(CNode* pfrom, const Consensus::Params& consensusParam
                         // best equivalent proof of work) than the best header chain we know about.
                         send = mi->second->IsValid(BLOCK_VALID_SCRIPTS) && (pindexBestHeader != NULL) &&
                             (pindexBestHeader->GetBlockTime() - mi->second->GetBlockTime() < nOneMonth) &&
-                            (GetBlockProofEquivalentTime(*pindexBestHeader, *mi->second, *pindexBestHeader, Params().GetConsensus()) < nOneMonth);
+                            (GetBlockProofEquivalentTime(*pindexBestHeader, *mi->second, *pindexBestHeader, consensusParams) < nOneMonth);
                         if (!send) {
                             LogPrintf("%s: ignoring request from peer=%i for old block that isn't in the main chain\n", __func__, pfrom->GetId());
                         }
@@ -4701,7 +4697,7 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
         uint256 alertHash = alert.GetHash();
         if (pfrom->setKnown.count(alertHash) == 0)
         {
-            if (alert.ProcessAlert(Params().AlertKey()))
+            if (alert.ProcessAlert(chainparams.AlertKey()))
             {
                 // Relay
                 pfrom->setKnown.insert(alertHash);
diff --git a/src/main.h b/src/main.h
index eb61ff9570..35774f3e25 100644
--- a/src/main.h
+++ b/src/main.h
@@ -172,9 +172,9 @@ FILE* OpenUndoFile(const CDiskBlockPos &pos, bool fReadOnly = false);
 /** Translation to a filesystem path */
 boost::filesystem::path GetBlockPosFilename(const CDiskBlockPos &pos, const char *prefix);
 /** Import blocks from an external file */
-bool LoadExternalBlockFile(FILE* fileIn, CDiskBlockPos *dbp = NULL);
+bool LoadExternalBlockFile(const CChainParams& chainparams, FILE* fileIn, CDiskBlockPos *dbp = NULL);
 /** Initialize a new block tree database + block data on disk */
-bool InitBlockIndex();
+bool InitBlockIndex(const CChainParams& chainparams);
 /** Load the block tree and coins database from disk */
 bool LoadBlockIndex();
 /** Unload database information */
@@ -199,7 +199,7 @@ std::string GetWarnings(const std::string& strFor);
 /** Retrieve a transaction (from memory pool, or from disk, if possible) */
 bool GetTransaction(const uint256 &hash, CTransaction &tx, const Consensus::Params& params, uint256 &hashBlock, bool fAllowSlow = false);
 /** Find the best known block, and make it the tip of the block chain */
-bool ActivateBestChain(CValidationState &state, const CBlock *pblock = NULL);
+bool ActivateBestChain(CValidationState& state, const CChainParams& chainparams, const CBlock* pblock = NULL);
 CAmount GetBlockSubsidy(int nHeight, const Consensus::Params& consensusParams);
 
 /**
@@ -217,7 +217,7 @@ CAmount GetBlockSubsidy(int nHeight, const Consensus::Params& consensusParams);
  *
  * @param[out]   setFilesToPrune   The set of file indices that can be unlinked will be returned
  */
-void FindFilesToPrune(std::set<int>& setFilesToPrune);
+void FindFilesToPrune(std::set<int>& setFilesToPrune, uint64_t nPruneAfterHeight);
 
 /**
  *  Actually unlink the specified files
@@ -383,9 +383,6 @@ bool ContextualCheckBlock(const CBlock& block, CValidationState& state, CBlockIn
 /** Check a block is completely valid from start to finish (only works on top of our current best block, with cs_main held) */
 bool TestBlockValidity(CValidationState& state, const CChainParams& chainparams, const CBlock& block, CBlockIndex* pindexPrev, bool fCheckPOW = true, bool fCheckMerkleRoot = true);
 
-/** Store block on disk. If dbp is non-NULL, the file is known to already reside on disk */
-bool AcceptBlock(const CBlock& block, CValidationState& state, CBlockIndex **pindex, bool fRequested, CDiskBlockPos* dbp);
-
 
 class CBlockFileInfo
 {
@@ -446,7 +443,7 @@ class CVerifyDB {
 public:
     CVerifyDB();
     ~CVerifyDB();
-    bool VerifyDB(CCoinsView *coinsview, int nCheckLevel, int nCheckDepth);
+    bool VerifyDB(const CChainParams& chainparams, CCoinsView *coinsview, int nCheckLevel, int nCheckDepth);
 };
 
 /** Find the last common block between the parameter chain and a locator. */
diff --git a/src/rpcblockchain.cpp b/src/rpcblockchain.cpp
index 9c0e78f772..5fa707f94e 100644
--- a/src/rpcblockchain.cpp
+++ b/src/rpcblockchain.cpp
@@ -562,7 +562,7 @@ UniValue verifychain(const UniValue& params, bool fHelp)
     if (params.size() > 1)
         nCheckDepth = params[1].get_int();
 
-    return CVerifyDB().VerifyDB(pcoinsTip, nCheckLevel, nCheckDepth);
+    return CVerifyDB().VerifyDB(Params(), pcoinsTip, nCheckLevel, nCheckDepth);
 }
 
 /** Implementation of IsSuperMajority with better feedback */
@@ -828,7 +828,7 @@ UniValue invalidateblock(const UniValue& params, bool fHelp)
     }
 
     if (state.IsValid()) {
-        ActivateBestChain(state);
+        ActivateBestChain(state, Params());
     }
 
     if (!state.IsValid()) {
@@ -867,7 +867,7 @@ UniValue reconsiderblock(const UniValue& params, bool fHelp)
     }
 
     if (state.IsValid()) {
-        ActivateBestChain(state);
+        ActivateBestChain(state, Params());
     }
 
     if (!state.IsValid()) {
diff --git a/src/test/test_bitcoin.cpp b/src/test/test_bitcoin.cpp
index 319e63ba55..816abd9281 100644
--- a/src/test/test_bitcoin.cpp
+++ b/src/test/test_bitcoin.cpp
@@ -50,6 +50,7 @@ BasicTestingSetup::~BasicTestingSetup()
 
 TestingSetup::TestingSetup(const std::string& chainName) : BasicTestingSetup(chainName)
 {
+    const CChainParams& chainparams = Params();
 #ifdef ENABLE_WALLET
         bitdb.MakeMock();
 #endif
@@ -60,7 +61,7 @@ TestingSetup::TestingSetup(const std::string& chainName) : BasicTestingSetup(cha
         pblocktree = new CBlockTreeDB(1 << 20, true);
         pcoinsdbview = new CCoinsViewDB(1 << 23, true);
         pcoinsTip = new CCoinsViewCache(pcoinsdbview);
-        InitBlockIndex();
+        InitBlockIndex(chainparams);
 #ifdef ENABLE_WALLET
         bool fFirstRun;
         pwalletMain = new CWallet("wallet.dat");