Chainparams: Get rid of CChainParams& Params(std::string)

src/bench/checkblock.cpp

@@ -40,7 +40,7 @@ static void DeserializeAndCheckBlockTest(benchmark::State& state)
     char a = '\0';
     stream.write(&a, 1); // Prevent compaction
 
-    Consensus::Params params = Params(CBaseChainParams::MAIN).GetConsensus();
+    const auto chainParams = CreateChainParams(CBaseChainParams::MAIN);
 
     while (state.KeepRunning()) {
         CBlock block; // Note that CBlock caches its checked state, so we need to recreate it here
@@ -48,7 +48,7 @@ static void DeserializeAndCheckBlockTest(benchmark::State& state)
         assert(stream.Rewind(sizeof(block_bench::block413567)));
 
         CValidationState validationState;
-        assert(CheckBlock(block, validationState, params));
+        assert(CheckBlock(block, validationState, chainParams->GetConsensus()));
     }
 }
 

src/chainparams.cpp

@@ -333,7 +333,6 @@ public:
 };
 
 static std::unique_ptr<CChainParams> globalChainParams;
-static std::unique_ptr<CChainParams> globalSwitchingChainParams;
 
 const CChainParams &Params() {
     assert(globalChainParams);
@@ -351,12 +350,6 @@ std::unique_ptr<CChainParams> CreateChainParams(const std::string& chain)
     throw std::runtime_error(strprintf("%s: Unknown chain %s.", __func__, chain));
 }
 
-const CChainParams& Params(const std::string& chain)
-{
-    globalSwitchingChainParams = CreateChainParams(chain);
-    return *globalSwitchingChainParams;
-}
-
 void SelectParams(const std::string& network)
 {
     SelectBaseParams(network);

src/chainparams.h

@@ -109,11 +109,6 @@ std::unique_ptr<CChainParams> CreateChainParams(const std::string& chain);
  */
 const CChainParams &Params();
 
-/**
- * @returns CChainParams for the given BIP70 chain name.
- */
-const CChainParams& Params(const std::string& chain);
-
 /**
  * Sets the params returned by Params() to those for the given BIP70 chain name.
  * @throws std::runtime_error when the chain is not supported.

src/init.cpp

@@ -330,6 +330,8 @@ std::string HelpMessage(HelpMessageMode mode)
 {
     const auto defaultBaseParams = CreateBaseChainParams(CBaseChainParams::MAIN);
     const auto testnetBaseParams = CreateBaseChainParams(CBaseChainParams::TESTNET);
+    const auto defaultChainParams = CreateChainParams(CBaseChainParams::MAIN);
+    const auto testnetChainParams = CreateChainParams(CBaseChainParams::TESTNET);
     const bool showDebug = GetBoolArg("-help-debug", false);
 
     // When adding new options to the categories, please keep and ensure alphabetical ordering.
@@ -341,7 +343,7 @@ std::string HelpMessage(HelpMessageMode mode)
     strUsage += HelpMessageOpt("-blocknotify=<cmd>", _("Execute command when the best block changes (%s in cmd is replaced by block hash)"));
     if (showDebug)
         strUsage += HelpMessageOpt("-blocksonly", strprintf(_("Whether to operate in a blocks only mode (default: %u)"), DEFAULT_BLOCKSONLY));
-    strUsage +=HelpMessageOpt("-assumevalid=<hex>", strprintf(_("If this block is in the chain assume that it and its ancestors are valid and potentially skip their script verification (0 to verify all, default: %s, testnet: %s)"), Params(CBaseChainParams::MAIN).GetConsensus().defaultAssumeValid.GetHex(), Params(CBaseChainParams::TESTNET).GetConsensus().defaultAssumeValid.GetHex()));
+    strUsage +=HelpMessageOpt("-assumevalid=<hex>", strprintf(_("If this block is in the chain assume that it and its ancestors are valid and potentially skip their script verification (0 to verify all, default: %s, testnet: %s)"), defaultChainParams->GetConsensus().defaultAssumeValid.GetHex(), testnetChainParams->GetConsensus().defaultAssumeValid.GetHex()));
     strUsage += HelpMessageOpt("-conf=<file>", strprintf(_("Specify configuration file (default: %s)"), BITCOIN_CONF_FILENAME));
     if (mode == HMM_BITCOIND)
     {
@@ -395,7 +397,7 @@ std::string HelpMessage(HelpMessageMode mode)
     strUsage += HelpMessageOpt("-onlynet=<net>", _("Only connect to nodes in network <net> (ipv4, ipv6 or onion)"));
     strUsage += HelpMessageOpt("-permitbaremultisig", strprintf(_("Relay non-P2SH multisig (default: %u)"), DEFAULT_PERMIT_BAREMULTISIG));
     strUsage += HelpMessageOpt("-peerbloomfilters", strprintf(_("Support filtering of blocks and transaction with bloom filters (default: %u)"), DEFAULT_PEERBLOOMFILTERS));
-    strUsage += HelpMessageOpt("-port=<port>", strprintf(_("Listen for connections on <port> (default: %u or testnet: %u)"), Params(CBaseChainParams::MAIN).GetDefaultPort(), Params(CBaseChainParams::TESTNET).GetDefaultPort()));
+    strUsage += HelpMessageOpt("-port=<port>", strprintf(_("Listen for connections on <port> (default: %u or testnet: %u)"), defaultChainParams->GetDefaultPort(), testnetChainParams->GetDefaultPort()));
     strUsage += HelpMessageOpt("-proxy=<ip:port>", _("Connect through SOCKS5 proxy"));
     strUsage += HelpMessageOpt("-proxyrandomize", strprintf(_("Randomize credentials for every proxy connection. This enables Tor stream isolation (default: %u)"), DEFAULT_PROXYRANDOMIZE));
     strUsage += HelpMessageOpt("-seednode=<ip>", _("Connect to a node to retrieve peer addresses, and disconnect"));
@@ -432,8 +434,8 @@ std::string HelpMessage(HelpMessageMode mode)
     {
         strUsage += HelpMessageOpt("-checkblocks=<n>", strprintf(_("How many blocks to check at startup (default: %u, 0 = all)"), DEFAULT_CHECKBLOCKS));
         strUsage += HelpMessageOpt("-checklevel=<n>", strprintf(_("How thorough the block verification of -checkblocks is (0-4, default: %u)"), DEFAULT_CHECKLEVEL));
-        strUsage += HelpMessageOpt("-checkblockindex", strprintf("Do a full consistency check for mapBlockIndex, setBlockIndexCandidates, chainActive and mapBlocksUnlinked occasionally. Also sets -checkmempool (default: %u)", Params(CBaseChainParams::MAIN).DefaultConsistencyChecks()));
-        strUsage += HelpMessageOpt("-checkmempool=<n>", strprintf("Run checks every <n> transactions (default: %u)", Params(CBaseChainParams::MAIN).DefaultConsistencyChecks()));
+        strUsage += HelpMessageOpt("-checkblockindex", strprintf("Do a full consistency check for mapBlockIndex, setBlockIndexCandidates, chainActive and mapBlocksUnlinked occasionally. Also sets -checkmempool (default: %u)", defaultChainParams->DefaultConsistencyChecks()));
+        strUsage += HelpMessageOpt("-checkmempool=<n>", strprintf("Run checks every <n> transactions (default: %u)", defaultChainParams->DefaultConsistencyChecks()));
         strUsage += HelpMessageOpt("-checkpoints", strprintf("Disable expensive verification for known chain history (default: %u)", DEFAULT_CHECKPOINTS_ENABLED));
         strUsage += HelpMessageOpt("-disablesafemode", strprintf("Disable safemode, override a real safe mode event (default: %u)", DEFAULT_DISABLE_SAFEMODE));
         strUsage += HelpMessageOpt("-testsafemode", strprintf("Force safe mode (default: %u)", DEFAULT_TESTSAFEMODE));
@@ -474,7 +476,7 @@ std::string HelpMessage(HelpMessageMode mode)
 
     strUsage += HelpMessageGroup(_("Node relay options:"));
     if (showDebug) {
-        strUsage += HelpMessageOpt("-acceptnonstdtxn", strprintf("Relay and mine \"non-standard\" transactions (%sdefault: %u)", "testnet/regtest only; ", !Params(CBaseChainParams::TESTNET).RequireStandard()));
+        strUsage += HelpMessageOpt("-acceptnonstdtxn", strprintf("Relay and mine \"non-standard\" transactions (%sdefault: %u)", "testnet/regtest only; ", defaultChainParams->RequireStandard()));
         strUsage += HelpMessageOpt("-incrementalrelayfee=<amt>", strprintf("Fee rate (in %s/kB) used to define cost of relay, used for mempool limiting and BIP 125 replacement. (default: %s)", CURRENCY_UNIT, FormatMoney(DEFAULT_INCREMENTAL_RELAY_FEE)));
         strUsage += HelpMessageOpt("-dustrelayfee=<amt>", strprintf("Fee rate (in %s/kB) used to defined dust, the value of an output such that it will cost about 1/3 of its value in fees at this fee rate to spend it. (default: %s)", CURRENCY_UNIT, FormatMoney(DUST_RELAY_TX_FEE)));
     }

src/qt/paymentserver.cpp

@@ -219,13 +219,15 @@ void PaymentServer::ipcParseCommandLine(int argc, char* argv[])
             if (GUIUtil::parseBitcoinURI(arg, &r) && !r.address.isEmpty())
             {
                 CBitcoinAddress address(r.address.toStdString());
+                auto tempChainParams = CreateChainParams(CBaseChainParams::MAIN);
 
-                if (address.IsValid(Params(CBaseChainParams::MAIN)))
+                if (address.IsValid(*tempChainParams))
                 {
                     SelectParams(CBaseChainParams::MAIN);
                 }
-                else if (address.IsValid(Params(CBaseChainParams::TESTNET)))
-                {
+                else {
+                    tempChainParams = CreateChainParams(CBaseChainParams::TESTNET);
+                    if (address.IsValid(*tempChainParams))
                         SelectParams(CBaseChainParams::TESTNET);
                 }
             }

src/test/main_tests.cpp

@@ -39,17 +39,18 @@ static void TestBlockSubsidyHalvings(int nSubsidyHalvingInterval)
 
 BOOST_AUTO_TEST_CASE(block_subsidy_test)
 {
-    TestBlockSubsidyHalvings(Params(CBaseChainParams::MAIN).GetConsensus()); // As in main
+    const auto chainParams = CreateChainParams(CBaseChainParams::MAIN);
+    TestBlockSubsidyHalvings(chainParams->GetConsensus()); // As in main
     TestBlockSubsidyHalvings(150); // As in regtest
     TestBlockSubsidyHalvings(1000); // Just another interval
 }
 
 BOOST_AUTO_TEST_CASE(subsidy_limit_test)
 {
-    const Consensus::Params& consensusParams = Params(CBaseChainParams::MAIN).GetConsensus();
+    const auto chainParams = CreateChainParams(CBaseChainParams::MAIN);
     CAmount nSum = 0;
     for (int nHeight = 0; nHeight < 14000000; nHeight += 1000) {
-        CAmount nSubsidy = GetBlockSubsidy(nHeight, consensusParams);
+        CAmount nSubsidy = GetBlockSubsidy(nHeight, chainParams->GetConsensus());
         BOOST_CHECK(nSubsidy <= 50 * COIN);
         nSum += nSubsidy * 1000;
         BOOST_CHECK(MoneyRange(nSum));

src/test/miner_tests.cpp

@@ -194,7 +194,8 @@ void TestPackageSelection(const CChainParams& chainparams, CScript scriptPubKey,
 BOOST_AUTO_TEST_CASE(CreateNewBlock_validity)
 {
     // Note that by default, these tests run with size accounting enabled.
-    const CChainParams& chainparams = Params(CBaseChainParams::MAIN);
+    const auto chainParams = CreateChainParams(CBaseChainParams::MAIN);
+    const CChainParams& chainparams = *chainParams;
     CScript scriptPubKey = CScript() << ParseHex("04678afdb0fe5548271967f1a67130b7105cd6a828e03909a67962e0ea1f61deb649f6bc3f4cef38c4f35504e51ec112de5c384df7ba0b8d578a4c702b6bf11d5f") << OP_CHECKSIG;
     std::unique_ptr<CBlockTemplate> pblocktemplate;
     CMutableTransaction tx,tx2;

src/test/versionbits_tests.cpp

@@ -209,7 +209,8 @@ BOOST_AUTO_TEST_CASE(versionbits_test)
     }
 
     // Sanity checks of version bit deployments
-    const Consensus::Params &mainnetParams = Params(CBaseChainParams::MAIN).GetConsensus();
+    const auto chainParams = CreateChainParams(CBaseChainParams::MAIN);
+    const Consensus::Params &mainnetParams = chainParams->GetConsensus();
     for (int i=0; i<(int) Consensus::MAX_VERSION_BITS_DEPLOYMENTS; i++) {
         uint32_t bitmask = VersionBitsMask(mainnetParams, (Consensus::DeploymentPos)i);
         // Make sure that no deployment tries to set an invalid bit.
@@ -235,7 +236,8 @@ BOOST_AUTO_TEST_CASE(versionbits_computeblockversion)
 {
     // Check that ComputeBlockVersion will set the appropriate bit correctly
     // on mainnet.
-    const Consensus::Params &mainnetParams = Params(CBaseChainParams::MAIN).GetConsensus();
+    const auto chainParams = CreateChainParams(CBaseChainParams::MAIN);
+    const Consensus::Params &mainnetParams = chainParams->GetConsensus();
 
     // Use the TESTDUMMY deployment for testing purposes.
     int64_t bit = mainnetParams.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].bit;