Merge #8855: Use a proper factory for creating chainparams

c1082a7 Chainparams: Use the factory for pow tests (Jorge Timón)
2351a06 Chainparams: Get rid of CChainParams& Params(std::string) (Jorge Timón)
f87f362 Chainparams: Use a regular factory for creating chainparams (Jorge Timón)

Tree-SHA512: 359c8a2a1bc9d02db7856d02810240ada28048ac088f878b575597a7255cdb0ffdd1a647085ee67a34c6a7e7ed9e6cfdb61240cf6e75139619b640dbb096072c

src/bench/checkblock.cpp

@@ -38,7 +38,7 @@ 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
@@ -46,7 +46,7 @@ static void DeserializeAndCheckBlockTest(benchmark::State& state)
         assert(stream.Rewind(sizeof(raw_bench::block813851)));
 
         CValidationState validationState;
-        assert(CheckBlock(block, validationState, params, block.GetBlockTime()));
+        assert(CheckBlock(block, validationState, chainParams->GetConsensus(), block.GetBlockTime()));
     }
 }
 

src/chainparams.cpp

@@ -82,6 +82,32 @@ static CBlock CreateGenesisBlock(uint32_t nTime, uint32_t nNonce, uint32_t nBits
     return CreateGenesisBlock(pszTimestamp, genesisOutputScript, nTime, nNonce, nBits, nVersion, genesisReward);
 }
 
+
+void CChainParams::UpdateBIP9Parameters(Consensus::DeploymentPos d, int64_t nStartTime, int64_t nTimeout, int64_t nWindowSize, int64_t nThreshold)
+{
+    consensus.vDeployments[d].nStartTime = nStartTime;
+    consensus.vDeployments[d].nTimeout = nTimeout;
+    if (nWindowSize != -1) {
+            consensus.vDeployments[d].nWindowSize = nWindowSize;
+    }
+    if (nThreshold != -1) {
+            consensus.vDeployments[d].nThreshold = nThreshold;
+    }
+}
+
+void CChainParams::UpdateDIP3Parameters(int nActivationHeight, int nEnforcementHeight)
+{
+    consensus.DIP0003Height = nActivationHeight;
+    consensus.DIP0003EnforcementHeight = nEnforcementHeight;
+}
+
+void CChainParams::UpdateBudgetParameters(int nMasternodePaymentsStartBlock, int nBudgetPaymentsStartBlock, int nSuperblockStartBlock)
+{
+    consensus.nMasternodePaymentsStartBlock = nMasternodePaymentsStartBlock;
+    consensus.nBudgetPaymentsStartBlock = nBudgetPaymentsStartBlock;
+    consensus.nSuperblockStartBlock = nSuperblockStartBlock;
+}
+
 static CBlock FindDevNetGenesisBlock(const Consensus::Params& params, const CBlock &prevBlock, const CAmount& reward)
 {
     std::string devNetName = GetDevNetName();
@@ -370,7 +396,6 @@ public:
         };
     }
 };
-static CMainParams mainParams;
 
 /**
  * Testnet (v3)
@@ -529,7 +554,6 @@ public:
 
     }
 };
-static CTestNetParams testNetParams;
 
 /**
  * Devnet
@@ -823,54 +847,26 @@ public:
         consensus.llmqChainLocks = Consensus::LLMQ_5_60;
         consensus.llmqForInstantSend = Consensus::LLMQ_5_60;
     }
-
-    void UpdateBIP9Parameters(Consensus::DeploymentPos d, int64_t nStartTime, int64_t nTimeout, int64_t nWindowSize, int64_t nThreshold)
-    {
-        consensus.vDeployments[d].nStartTime = nStartTime;
-        consensus.vDeployments[d].nTimeout = nTimeout;
-        if (nWindowSize != -1) {
-            consensus.vDeployments[d].nWindowSize = nWindowSize;
-        }
-        if (nThreshold != -1) {
-            consensus.vDeployments[d].nThreshold = nThreshold;
-        }
-    }
-
-    void UpdateDIP3Parameters(int nActivationHeight, int nEnforcementHeight)
-    {
-        consensus.DIP0003Height = nActivationHeight;
-        consensus.DIP0003EnforcementHeight = nEnforcementHeight;
-    }
-
-    void UpdateBudgetParameters(int nMasternodePaymentsStartBlock, int nBudgetPaymentsStartBlock, int nSuperblockStartBlock)
-    {
-        consensus.nMasternodePaymentsStartBlock = nMasternodePaymentsStartBlock;
-        consensus.nBudgetPaymentsStartBlock = nBudgetPaymentsStartBlock;
-        consensus.nSuperblockStartBlock = nSuperblockStartBlock;
-    }
 };
-static CRegTestParams regTestParams;
 
-static CChainParams *pCurrentParams = 0;
+static std::unique_ptr<CChainParams> globalChainParams;
 
 const CChainParams &Params() {
-    assert(pCurrentParams);
+    assert(globalChainParams);
-    return *pCurrentParams;
+    return *globalChainParams;
 }
 
-CChainParams& Params(const std::string& chain)
+std::unique_ptr<CChainParams> CreateChainParams(const std::string& chain)
 {
     if (chain == CBaseChainParams::MAIN)
-            return mainParams;
+        return std::unique_ptr<CChainParams>(new CMainParams());
     else if (chain == CBaseChainParams::TESTNET)
-            return testNetParams;
+        return std::unique_ptr<CChainParams>(new CTestNetParams());
     else if (chain == CBaseChainParams::DEVNET) {
-            assert(devNetParams);
+        return std::unique_ptr<CChainParams>(new CDevNetParams());
-            return *devNetParams;
     } else if (chain == CBaseChainParams::REGTEST)
-            return regTestParams;
+        return std::unique_ptr<CChainParams>(new CRegTestParams());
-    else
+    throw std::runtime_error(strprintf("%s: Unknown chain %s.", __func__, chain));
-        throw std::runtime_error(strprintf("%s: Unknown chain %s.", __func__, chain));
 }
 
 void SelectParams(const std::string& network)
@@ -882,22 +878,22 @@ void SelectParams(const std::string& network)
     }
 
     SelectBaseParams(network);
-    pCurrentParams = &Params(network);
+    globalChainParams = CreateChainParams(network);
 }
 
-void UpdateRegtestBIP9Parameters(Consensus::DeploymentPos d, int64_t nStartTime, int64_t nTimeout, int64_t nWindowSize, int64_t nThreshold)
+void UpdateBIP9Parameters(Consensus::DeploymentPos d, int64_t nStartTime, int64_t nTimeout, int64_t nWindowSize, int64_t nThreshold)
 {
-    regTestParams.UpdateBIP9Parameters(d, nStartTime, nTimeout, nWindowSize, nThreshold);
+    globalChainParams->UpdateBIP9Parameters(d, nStartTime, nTimeout, nWindowSize, nThreshold);
 }
 
-void UpdateRegtestDIP3Parameters(int nActivationHeight, int nEnforcementHeight)
+void UpdateDIP3Parameters(int nActivationHeight, int nEnforcementHeight)
 {
-    regTestParams.UpdateDIP3Parameters(nActivationHeight, nEnforcementHeight);
+    globalChainParams->UpdateDIP3Parameters(nActivationHeight, nEnforcementHeight);
 }
 
-void UpdateRegtestBudgetParameters(int nMasternodePaymentsStartBlock, int nBudgetPaymentsStartBlock, int nSuperblockStartBlock)
+void UpdateBudgetParameters(int nMasternodePaymentsStartBlock, int nBudgetPaymentsStartBlock, int nSuperblockStartBlock)
 {
-    regTestParams.UpdateBudgetParameters(nMasternodePaymentsStartBlock, nBudgetPaymentsStartBlock, nSuperblockStartBlock);
+    globalChainParams->UpdateBudgetParameters(nMasternodePaymentsStartBlock, nBudgetPaymentsStartBlock, nSuperblockStartBlock);
 }
 
 void UpdateDevnetSubsidyAndDiffParams(int nMinimumDifficultyBlocks, int nHighSubsidyBlocks, int nHighSubsidyFactor)

src/chainparams.h

@@ -11,6 +11,7 @@
 #include "primitives/block.h"
 #include "protocol.h"
 
+#include <memory>
 #include <vector>
 
 struct CDNSSeedData {
@@ -83,6 +84,9 @@ public:
     const std::vector<SeedSpec6>& FixedSeeds() const { return vFixedSeeds; }
     const CCheckpointData& Checkpoints() const { return checkpointData; }
     const ChainTxData& TxData() const { return chainTxData; }
+    void UpdateBIP9Parameters(Consensus::DeploymentPos d, int64_t nStartTime, int64_t nTimeout, int64_t nWindowSize, int64_t nThreshold);
+    void UpdateDIP3Parameters(int nActivationHeight, int nEnforcementHeight);
+    void UpdateBudgetParameters(int nMasternodePaymentsStartBlock, int nBudgetPaymentsStartBlock, int nSuperblockStartBlock);
     int PoolMinParticipants() const { return nPoolMinParticipants; }
     int PoolMaxParticipants() const { return nPoolMaxParticipants; }
     int FulfilledRequestExpireTime() const { return nFulfilledRequestExpireTime; }
@@ -119,17 +123,19 @@ protected:
     bool fBIP9CheckMasternodesUpgraded;
 };
 
+/**
+ * Creates and returns a std::unique_ptr<CChainParams> of the chosen chain.
+ * @returns a CChainParams* of the chosen chain.
+ * @throws a std::runtime_error if the chain is not supported.
+ */
+std::unique_ptr<CChainParams> CreateChainParams(const std::string& chain);
+
 /**
  * Return the currently selected parameters. This won't change after app
  * startup, except for unit tests.
  */
 const CChainParams &Params();
 
-/**
- * @returns CChainParams for the given BIP70 chain name.
- */
-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.
@@ -139,17 +145,17 @@ void SelectParams(const std::string& chain);
 /**
  * Allows modifying the BIP9 regtest parameters.
  */
-void UpdateRegtestBIP9Parameters(Consensus::DeploymentPos d, int64_t nStartTime, int64_t nTimeout, int64_t nWindowSize, int64_t nThreshold);
+void UpdateBIP9Parameters(Consensus::DeploymentPos d, int64_t nStartTime, int64_t nTimeout, int64_t nWindowSize, int64_t nThreshold);
 
 /**
  * Allows modifying the DIP3 activation and enforcement height
  */
-void UpdateRegtestDIP3Parameters(int nActivationHeight, int nEnforcementHeight);
+void UpdateDIP3Parameters(int nActivationHeight, int nEnforcementHeight);
 
 /**
  * Allows modifying the budget regtest parameters.
  */
-void UpdateRegtestBudgetParameters(int nMasternodePaymentsStartBlock, int nBudgetPaymentsStartBlock, int nSuperblockStartBlock);
+void UpdateBudgetParameters(int nMasternodePaymentsStartBlock, int nBudgetPaymentsStartBlock, int nSuperblockStartBlock);
 
 /**
  * Allows modifying the subsidy and difficulty devnet parameters.

src/chainparamsbase.cpp

@@ -37,7 +37,6 @@ public:
         nRPCPort = 9998;
     }
 };
-static CBaseMainParams mainParams;
 
 /**
  * Testnet (v3)
@@ -51,7 +50,6 @@ public:
         strDataDir = "testnet3";
     }
 };
-static CBaseTestNetParams testNetParams;
 
 /**
  * Devnet
@@ -65,7 +63,6 @@ public:
         strDataDir = dataDir;
     }
 };
-static CBaseDevNetParams *devNetParams;
 
 /*
  * Regression test
@@ -79,43 +76,32 @@ public:
         strDataDir = "regtest";
     }
 };
-static CBaseRegTestParams regTestParams;
 
-static CBaseChainParams* pCurrentBaseParams = 0;
+static std::unique_ptr<CBaseChainParams> globalChainBaseParams;
 
 const CBaseChainParams& BaseParams()
 {
-    assert(pCurrentBaseParams);
+    assert(globalChainBaseParams);
-    return *pCurrentBaseParams;
+    return *globalChainBaseParams;
 }
 
-CBaseChainParams& BaseParams(const std::string& chain)
+std::unique_ptr<CBaseChainParams> CreateBaseChainParams(const std::string& chain)
 {
     if (chain == CBaseChainParams::MAIN)
-        return mainParams;
+        return std::unique_ptr<CBaseChainParams>(new CBaseMainParams());
     else if (chain == CBaseChainParams::TESTNET)
-        return testNetParams;
+        return std::unique_ptr<CBaseChainParams>(new CBaseTestNetParams());
     else if (chain == CBaseChainParams::DEVNET) {
-        assert(devNetParams);
+        return std::unique_ptr<CBaseChainParams>(new CBaseDevNetParams(GetDevNetName()));
-        return *devNetParams;
     } else if (chain == CBaseChainParams::REGTEST)
-        return regTestParams;
+        return std::unique_ptr<CBaseChainParams>(new CBaseRegTestParams());
     else
         throw std::runtime_error(strprintf("%s: Unknown chain %s.", __func__, chain));
 }
 
 void SelectBaseParams(const std::string& chain)
 {
-    if (chain == CBaseChainParams::DEVNET) {
+    globalChainBaseParams = CreateBaseChainParams(chain);
-        std::string devNetName = GetDevNetName();
-        assert(!devNetName.empty());
-
-        devNetParams = (CBaseDevNetParams*)new uint8_t[sizeof(CBaseDevNetParams)];
-        memset(devNetParams, 0, sizeof(CBaseDevNetParams));
-        new (devNetParams) CBaseDevNetParams(devNetName);
-    }
-
-    pCurrentBaseParams = &BaseParams(chain);
 }
 
 std::string ChainNameFromCommandLine()

src/chainparamsbase.h

@@ -5,6 +5,7 @@
 #ifndef BITCOIN_CHAINPARAMSBASE_H
 #define BITCOIN_CHAINPARAMSBASE_H
 
+#include <memory>
 #include <string>
 #include <vector>
 
@@ -31,6 +32,13 @@ protected:
     std::string strDataDir;
 };
 
+/**
+ * Creates and returns a std::unique_ptr<CBaseChainParams> of the chosen chain.
+ * @returns a CBaseChainParams* of the chosen chain.
+ * @throws a std::runtime_error if the chain is not supported.
+ */
+std::unique_ptr<CBaseChainParams> CreateBaseChainParams(const std::string& chain);
+
 /**
  * Append the help messages for the chainparams options to the
  * parameter string.
@@ -43,8 +51,6 @@ void AppendParamsHelpMessages(std::string& strUsage, bool debugHelp=true);
  */
 const CBaseChainParams& BaseParams();
 
-CBaseChainParams& BaseParams(const std::string& chain);
-
 /** Sets the params returned by Params() to those for the given network. */
 void SelectBaseParams(const std::string& chain);
 

src/dash-cli.cpp

@@ -32,6 +32,8 @@ static const int CONTINUE_EXECUTION=-1;
 
 std::string HelpMessageCli()
 {
+    const auto defaultBaseParams = CreateBaseChainParams(CBaseChainParams::MAIN);
+    const auto testnetBaseParams = CreateBaseChainParams(CBaseChainParams::TESTNET);
     std::string strUsage;
     strUsage += HelpMessageGroup(_("Options:"));
     strUsage += HelpMessageOpt("-?", _("This help message"));
@@ -40,7 +42,7 @@ std::string HelpMessageCli()
     AppendParamsHelpMessages(strUsage);
     strUsage += HelpMessageOpt("-named", strprintf(_("Pass named instead of positional arguments (default: %s)"), DEFAULT_NAMED));
     strUsage += HelpMessageOpt("-rpcconnect=<ip>", strprintf(_("Send commands to node running on <ip> (default: %s)"), DEFAULT_RPCCONNECT));
-    strUsage += HelpMessageOpt("-rpcport=<port>", strprintf(_("Connect to JSON-RPC on <port> (default: %u or testnet: %u)"), BaseParams(CBaseChainParams::MAIN).RPCPort(), BaseParams(CBaseChainParams::TESTNET).RPCPort()));
+    strUsage += HelpMessageOpt("-rpcport=<port>", strprintf(_("Connect to JSON-RPC on <port> (default: %u or testnet: %u)"), defaultBaseParams->RPCPort(), testnetBaseParams->RPCPort()));
     strUsage += HelpMessageOpt("-rpcwait", _("Wait for RPC server to start"));
     strUsage += HelpMessageOpt("-rpcuser=<user>", _("Username for JSON-RPC connections"));
     strUsage += HelpMessageOpt("-rpcpassword=<pw>", _("Password for JSON-RPC connections"));

src/evo/providertx.cpp

@@ -27,7 +27,7 @@ static bool CheckService(const uint256& proTxHash, const ProTx& proTx, CValidati
         return state.DoS(10, false, REJECT_INVALID, "bad-protx-addr");
     }
 
-    int mainnetDefaultPort = Params(CBaseChainParams::MAIN).GetDefaultPort();
+    int mainnetDefaultPort = CreateChainParams(CBaseChainParams::MAIN)->GetDefaultPort();
     if (Params().NetworkIDString() == CBaseChainParams::MAIN) {
         if (proTx.addr.GetPort() != mainnetDefaultPort) {
             return state.DoS(10, false, REJECT_INVALID, "bad-protx-addr-port");

src/init.cpp

@@ -434,6 +434,10 @@ void OnRPCPreCommand(const CRPCCommand& cmd)
 
 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 = gArgs.GetBoolArg("-help-debug", false);
 
     // When adding new options to the categories, please keep and ensure alphabetical ordering.
@@ -445,7 +449,7 @@ 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)
     {
@@ -502,7 +506,7 @@ 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"));
@@ -547,8 +551,8 @@ 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("-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)", Params(CBaseChainParams::MAIN).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));
@@ -617,7 +621,7 @@ 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)));
     }
@@ -643,7 +647,7 @@ std::string HelpMessage(HelpMessageMode mode)
     strUsage += HelpMessageOpt("-rpcuser=<user>", _("Username for JSON-RPC connections"));
     strUsage += HelpMessageOpt("-rpcpassword=<pw>", _("Password for JSON-RPC connections"));
     strUsage += HelpMessageOpt("-rpcauth=<userpw>", _("Username and hashed password for JSON-RPC connections. The field <userpw> comes in the format: <USERNAME>:<SALT>$<HASH>. A canonical python script is included in share/rpcuser. The client then connects normally using the rpcuser=<USERNAME>/rpcpassword=<PASSWORD> pair of arguments. This option can be specified multiple times"));
-    strUsage += HelpMessageOpt("-rpcport=<port>", strprintf(_("Listen for JSON-RPC connections on <port> (default: %u or testnet: %u)"), BaseParams(CBaseChainParams::MAIN).RPCPort(), BaseParams(CBaseChainParams::TESTNET).RPCPort()));
+    strUsage += HelpMessageOpt("-rpcport=<port>", strprintf(_("Listen for JSON-RPC connections on <port> (default: %u or testnet: %u)"), defaultBaseParams->RPCPort(), testnetBaseParams->RPCPort()));
     strUsage += HelpMessageOpt("-rpcallowip=<ip>", _("Allow JSON-RPC connections from specified source. Valid for <ip> are a single IP (e.g. 1.2.3.4), a network/netmask (e.g. 1.2.3.4/255.255.255.0) or a network/CIDR (e.g. 1.2.3.4/24). This option can be specified multiple times"));
     strUsage += HelpMessageOpt("-rpcthreads=<n>", strprintf(_("Set the number of threads to service RPC calls (default: %d)"), DEFAULT_HTTP_THREADS));
     if (showDebug) {
@@ -1348,7 +1352,7 @@ bool AppInitParameterInteraction()
             for (int j=0; j<(int)Consensus::MAX_VERSION_BITS_DEPLOYMENTS; ++j)
             {
                 if (vDeploymentParams[0].compare(VersionBitsDeploymentInfo[j].name) == 0) {
-                    UpdateRegtestBIP9Parameters(Consensus::DeploymentPos(j), nStartTime, nTimeout, nWindowSize, nThreshold);
+                    UpdateBIP9Parameters(Consensus::DeploymentPos(j), nStartTime, nTimeout, nWindowSize, nThreshold);
                     found = true;
                     LogPrintf("Setting BIP9 activation parameters for %s to start=%ld, timeout=%ld, window=%ld, threshold=%ld\n", vDeploymentParams[0], nStartTime, nTimeout, nWindowSize, nThreshold);
                     break;
@@ -1378,7 +1382,7 @@ bool AppInitParameterInteraction()
         if (!ParseInt32(vDIP3Params[1], &nDIP3EnforcementHeight)) {
             return InitError(strprintf("Invalid nDIP3EnforcementHeight (%s)", vDIP3Params[1]));
         }
-        UpdateRegtestDIP3Parameters(nDIP3ActivationHeight, nDIP3EnforcementHeight);
+        UpdateDIP3Parameters(nDIP3ActivationHeight, nDIP3EnforcementHeight);
     }
 
     if (gArgs.IsArgSet("-budgetparams")) {
@@ -1403,7 +1407,7 @@ bool AppInitParameterInteraction()
         if (!ParseInt32(vBudgetParams[2], &nSuperblockStartBlock)) {
             return InitError(strprintf("Invalid nSuperblockStartBlock (%s)", vBudgetParams[2]));
         }
-        UpdateRegtestBudgetParameters(nMasternodePaymentsStartBlock, nBudgetPaymentsStartBlock, nSuperblockStartBlock);
+        UpdateBudgetParameters(nMasternodePaymentsStartBlock, nBudgetPaymentsStartBlock, nSuperblockStartBlock);
     }
 
     if (chainparams.NetworkIDString() == CBaseChainParams::DEVNET) {

src/qt/paymentserver.cpp

@@ -220,14 +220,16 @@ 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);
-                    SelectParams(CBaseChainParams::TESTNET);
+                    if (address.IsValid(*tempChainParams))
+                        SelectParams(CBaseChainParams::TESTNET);
                 }
             }
         }

src/test/miner_tests.cpp

@@ -198,7 +198,8 @@ void TestPackageSelection(const CChainParams& chainparams, CScript scriptPubKey,
 // NOTE: These tests rely on CreateNewBlock doing its own self-validation!
 BOOST_AUTO_TEST_CASE(CreateNewBlock_validity)
 {
-    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, pemptyblocktemplate;
     CMutableTransaction tx,tx2;

src/test/pow_tests.cpp

@@ -16,8 +16,7 @@ BOOST_FIXTURE_TEST_SUITE(pow_tests, BasicTestingSetup)
 /* Test calculation of next difficulty target with DGW */
 BOOST_AUTO_TEST_CASE(get_next_work)
 {
-    SelectParams(CBaseChainParams::MAIN);
+    const auto chainParams = CreateChainParams(CBaseChainParams::MAIN);
-    const Consensus::Params& params = Params().GetConsensus();
 
     // build the chain of 24 blocks
     CBlockIndex blockIndexLast;
@@ -119,81 +118,75 @@ BOOST_AUTO_TEST_CASE(get_next_work)
 
     CBlockHeader blockHeader;
     blockHeader.nTime = 1408732505; // Block #123457
-    BOOST_CHECK_EQUAL(GetNextWorkRequired(&blockIndexLast, &blockHeader, params), 0x1b1441de); // Block #123457 has 0x1b1441de
+    BOOST_CHECK_EQUAL(GetNextWorkRequired(&blockIndexLast, &blockHeader, chainParams->GetConsensus()), 0x1b1441de); // Block #123457 has 0x1b1441de
 
     // test special rules for slow blocks on devnet/testnet
     gArgs.SoftSetBoolArg("-devnet", true);
-    SelectParams(CBaseChainParams::DEVNET);
+    const auto chainParamsDev = CreateChainParams(CBaseChainParams::DEVNET);
-    const Consensus::Params& paramsdev = Params().GetConsensus();
 
     // make sure normal rules apply
     blockHeader.nTime = 1408732505; // Block #123457
-    BOOST_CHECK_EQUAL(GetNextWorkRequired(&blockIndexLast, &blockHeader, paramsdev), 0x1b1441de); // Block #123457 has 0x1b1441de
+    BOOST_CHECK_EQUAL(GetNextWorkRequired(&blockIndexLast, &blockHeader, chainParamsDev->GetConsensus()), 0x1b1441de); // Block #123457 has 0x1b1441de
 
     // 10x higher target
     blockHeader.nTime = 1408733090; // Block #123457 (10m+1sec)
-    BOOST_CHECK_EQUAL(GetNextWorkRequired(&blockIndexLast, &blockHeader, paramsdev), 0x1c00c8f8); // Block #123457 has 0x1c00c8f8
+    BOOST_CHECK_EQUAL(GetNextWorkRequired(&blockIndexLast, &blockHeader, chainParamsDev->GetConsensus()), 0x1c00c8f8); // Block #123457 has 0x1c00c8f8
     blockHeader.nTime = 1408733689; // Block #123457 (20m)
-    BOOST_CHECK_EQUAL(GetNextWorkRequired(&blockIndexLast, &blockHeader, paramsdev), 0x1c00c8f8); // Block #123457 has 0x1c00c8f8
+    BOOST_CHECK_EQUAL(GetNextWorkRequired(&blockIndexLast, &blockHeader, chainParamsDev->GetConsensus()), 0x1c00c8f8); // Block #123457 has 0x1c00c8f8
     // lowest diff possible
     blockHeader.nTime = 1408739690; // Block #123457 (2h+1sec)
-    BOOST_CHECK_EQUAL(GetNextWorkRequired(&blockIndexLast, &blockHeader, paramsdev), 0x207fffff); // Block #123457 has 0x207fffff
+    BOOST_CHECK_EQUAL(GetNextWorkRequired(&blockIndexLast, &blockHeader, chainParamsDev->GetConsensus()), 0x207fffff); // Block #123457 has 0x207fffff
     blockHeader.nTime = 1408743289; // Block #123457 (3h)
-    BOOST_CHECK_EQUAL(GetNextWorkRequired(&blockIndexLast, &blockHeader, paramsdev), 0x207fffff); // Block #123457 has 0x207fffff
+    BOOST_CHECK_EQUAL(GetNextWorkRequired(&blockIndexLast, &blockHeader, chainParamsDev->GetConsensus()), 0x207fffff); // Block #123457 has 0x207fffff
 }
 
 /* Test the constraint on the upper bound for next work */
 // BOOST_AUTO_TEST_CASE(get_next_work_pow_limit)
 // {
-//     SelectParams(CBaseChainParams::MAIN);
+//     const auto chainParams = CreateChainParams(CBaseChainParams::MAIN);
-//     const Consensus::Params& params = Params().GetConsensus();
 
 //     int64_t nLastRetargetTime = 1231006505; // Block #0
 //     CBlockIndex pindexLast;
 //     pindexLast.nHeight = 2015;
 //     pindexLast.nTime = 1233061996;  // Block #2015
 //     pindexLast.nBits = 0x1d00ffff;
-//     BOOST_CHECK_EQUAL(CalculateNextWorkRequired(&pindexLast, nLastRetargetTime, params), 0x1d00ffff);
+//     BOOST_CHECK_EQUAL(CalculateNextWorkRequired(&pindexLast, nLastRetargetTime, chainParams->GetConsensus()), 0x1d00ffff);
 // }
 
 /* Test the constraint on the lower bound for actual time taken */
 // BOOST_AUTO_TEST_CASE(get_next_work_lower_limit_actual)
 // {
-//     SelectParams(CBaseChainParams::MAIN);
+//     const auto chainParams = CreateChainParams(CBaseChainParams::MAIN);
-//     const Consensus::Params& params = Params().GetConsensus();
 
 //     int64_t nLastRetargetTime = 1279008237; // Block #66528
 //     CBlockIndex pindexLast;
 //     pindexLast.nHeight = 68543;
 //     pindexLast.nTime = 1279297671;  // Block #68543
 //     pindexLast.nBits = 0x1c05a3f4;
-//     BOOST_CHECK_EQUAL(CalculateNextWorkRequired(&pindexLast, nLastRetargetTime, params), 0x1c0168fd);
+//     BOOST_CHECK_EQUAL(CalculateNextWorkRequired(&pindexLast, nLastRetargetTime, chainParams->GetConsensus()), 0x1c0168fd);
 // }
 
 /* Test the constraint on the upper bound for actual time taken */
 // BOOST_AUTO_TEST_CASE(get_next_work_upper_limit_actual)
 // {
-//     SelectParams(CBaseChainParams::MAIN);
+//     const auto chainParams = CreateChainParams(CBaseChainParams::MAIN);
-//     const Consensus::Params& params = Params().GetConsensus();
 
 //     int64_t nLastRetargetTime = 1263163443; // NOTE: Not an actual block time
 //     CBlockIndex pindexLast;
 //     pindexLast.nHeight = 46367;
 //     pindexLast.nTime = 1269211443;  // Block #46367
 //     pindexLast.nBits = 0x1c387f6f;
-//     BOOST_CHECK_EQUAL(CalculateNextWorkRequired(&pindexLast, nLastRetargetTime, params), 0x1d00e1fd);
+//     BOOST_CHECK_EQUAL(CalculateNextWorkRequired(&pindexLast, nLastRetargetTime, chainParams->GetConsensus()), 0x1d00e1fd);
 // }
 
 BOOST_AUTO_TEST_CASE(GetBlockProofEquivalentTime_test)
 {
-    SelectParams(CBaseChainParams::MAIN);
+    const auto chainParams = CreateChainParams(CBaseChainParams::MAIN);
-    const Consensus::Params& params = Params().GetConsensus();
-
     std::vector<CBlockIndex> blocks(10000);
     for (int i = 0; i < 10000; i++) {
         blocks[i].pprev = i ? &blocks[i - 1] : NULL;
         blocks[i].nHeight = i;
-        blocks[i].nTime = 1269211443 + i * params.nPowTargetSpacing;
+        blocks[i].nTime = 1269211443 + i * chainParams->GetConsensus().nPowTargetSpacing;
         blocks[i].nBits = 0x207fffff; /* target 0x7fffff000... */
         blocks[i].nChainWork = i ? blocks[i - 1].nChainWork + GetBlockProof(blocks[i - 1]) : arith_uint256(0);
     }
@@ -203,7 +196,7 @@ BOOST_AUTO_TEST_CASE(GetBlockProofEquivalentTime_test)
         CBlockIndex *p2 = &blocks[GetRand(10000)];
         CBlockIndex *p3 = &blocks[GetRand(10000)];
 
-        int64_t tdiff = GetBlockProofEquivalentTime(*p1, *p2, *p3, params);
+        int64_t tdiff = GetBlockProofEquivalentTime(*p1, *p2, *p3, chainParams->GetConsensus());
         BOOST_CHECK_EQUAL(tdiff, p1->GetBlockTime() - p2->GetBlockTime());
     }
 }

src/test/subsidy_tests.cpp

@@ -13,7 +13,7 @@ BOOST_FIXTURE_TEST_SUITE(subsidy_tests, TestingSetup)
 
 BOOST_AUTO_TEST_CASE(block_subsidy_test)
 {
-    const Consensus::Params& consensusParams = Params(CBaseChainParams::MAIN).GetConsensus();
+    const auto chainParams = CreateChainParams(CBaseChainParams::MAIN);
 
     uint32_t nPrevBits;
     int32_t nPrevHeight;
@@ -22,43 +22,43 @@ BOOST_AUTO_TEST_CASE(block_subsidy_test)
     // details for block 4249 (subsidy returned will be for block 4250)
     nPrevBits = 0x1c4a47c4;
     nPrevHeight = 4249;
-    nSubsidy = GetBlockSubsidy(nPrevBits, nPrevHeight, consensusParams, false);
+    nSubsidy = GetBlockSubsidy(nPrevBits, nPrevHeight, chainParams->GetConsensus(), false);
     BOOST_CHECK_EQUAL(nSubsidy, 50000000000ULL);
 
     // details for block 4501 (subsidy returned will be for block 4502)
     nPrevBits = 0x1c4a47c4;
     nPrevHeight = 4501;
-    nSubsidy = GetBlockSubsidy(nPrevBits, nPrevHeight, consensusParams, false);
+    nSubsidy = GetBlockSubsidy(nPrevBits, nPrevHeight, chainParams->GetConsensus(), false);
     BOOST_CHECK_EQUAL(nSubsidy, 5600000000ULL);
 
     // details for block 5464 (subsidy returned will be for block 5465)
     nPrevBits = 0x1c29ec00;
     nPrevHeight = 5464;
-    nSubsidy = GetBlockSubsidy(nPrevBits, nPrevHeight, consensusParams, false);
+    nSubsidy = GetBlockSubsidy(nPrevBits, nPrevHeight, chainParams->GetConsensus(), false);
     BOOST_CHECK_EQUAL(nSubsidy, 2100000000ULL);
 
     // details for block 5465 (subsidy returned will be for block 5466)
     nPrevBits = 0x1c29ec00;
     nPrevHeight = 5465;
-    nSubsidy = GetBlockSubsidy(nPrevBits, nPrevHeight, consensusParams, false);
+    nSubsidy = GetBlockSubsidy(nPrevBits, nPrevHeight, chainParams->GetConsensus(), false);
     BOOST_CHECK_EQUAL(nSubsidy, 12200000000ULL);
 
     // details for block 17588 (subsidy returned will be for block 17589)
     nPrevBits = 0x1c08ba34;
     nPrevHeight = 17588;
-    nSubsidy = GetBlockSubsidy(nPrevBits, nPrevHeight, consensusParams, false);
+    nSubsidy = GetBlockSubsidy(nPrevBits, nPrevHeight, chainParams->GetConsensus(), false);
     BOOST_CHECK_EQUAL(nSubsidy, 6100000000ULL);
 
     // details for block 99999 (subsidy returned will be for block 100000)
     nPrevBits = 0x1b10cf42;
     nPrevHeight = 99999;
-    nSubsidy = GetBlockSubsidy(nPrevBits, nPrevHeight, consensusParams, false);
+    nSubsidy = GetBlockSubsidy(nPrevBits, nPrevHeight, chainParams->GetConsensus(), false);
     BOOST_CHECK_EQUAL(nSubsidy, 500000000ULL);
 
     // details for block 210239 (subsidy returned will be for block 210240)
     nPrevBits = 0x1b11548e;
     nPrevHeight = 210239;
-    nSubsidy = GetBlockSubsidy(nPrevBits, nPrevHeight, consensusParams, false);
+    nSubsidy = GetBlockSubsidy(nPrevBits, nPrevHeight, chainParams->GetConsensus(), false);
     BOOST_CHECK_EQUAL(nSubsidy, 500000000ULL);
 
     // 1st subsidy reduction happens here
@@ -66,7 +66,7 @@ BOOST_AUTO_TEST_CASE(block_subsidy_test)
     // details for block 210240 (subsidy returned will be for block 210241)
     nPrevBits = 0x1b10d50b;
     nPrevHeight = 210240;
-    nSubsidy = GetBlockSubsidy(nPrevBits, nPrevHeight, consensusParams, false);
+    nSubsidy = GetBlockSubsidy(nPrevBits, nPrevHeight, chainParams->GetConsensus(), false);
     BOOST_CHECK_EQUAL(nSubsidy, 464285715ULL);
 }
 

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;