Merge #13311: Don't edit Chainparams after initialization

6fa901fb47 Don't edit Chainparams after initialization (Jorge Timón)
980b38f8a1 MOVEONLY: Move versionbits info out of versionbits.o (Jorge Timón)

Pull request description:

  This encapsulates the "-vbparams" option, which is only meant for regtest, directly on CRegTestParams.

  This is a refactor and doesn't change functionality.

  Related to https://github.com/bitcoin/bitcoin/pull/8994

Tree-SHA512: 79771d729a63a720e743a9c77d5e2d80369f072d66202a43c1304e83a7d0ef7c6103d4968a03aea9666cc89a7203c618da972124a677b38cfe62ddaeb28f9f5d

12 files changed, 101 insertions, 83 deletions

diff --git a/src/Makefile.am b/src/Makefile.am
index f7d7a5d377..a1b9b4cb82 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -187,6 +187,7 @@ BITCOIN_CORE_H = \
   validation.h \
   validationinterface.h \
   versionbits.h \
+  versionbitsinfo.h \
   walletinitinterface.h \
   wallet/coincontrol.h \
   wallet/crypter.h \
@@ -400,6 +401,7 @@ libbitcoin_common_a_SOURCES = \
   script/ismine.cpp \
   script/sign.cpp \
   script/standard.cpp \
+  versionbitsinfo.cpp \
   warnings.cpp \
   $(BITCOIN_CORE_H)
 
diff --git a/src/chainparams.cpp b/src/chainparams.cpp
index b80cc2c259..0574e2395e 100644
--- a/src/chainparams.cpp
+++ b/src/chainparams.cpp
@@ -10,9 +10,13 @@
 #include <tinyformat.h>
 #include <util.h>
 #include <utilstrencodings.h>
+#include <versionbitsinfo.h>
 
 #include <assert.h>
 
+#include <boost/algorithm/string/classification.hpp>
+#include <boost/algorithm/string/split.hpp>
+
 static CBlock CreateGenesisBlock(const char* pszTimestamp, const CScript& genesisOutputScript, uint32_t nTime, uint32_t nNonce, uint32_t nBits, int32_t nVersion, const CAmount& genesisReward)
 {
     CMutableTransaction txNew;
@@ -52,12 +56,6 @@ static CBlock CreateGenesisBlock(uint32_t nTime, uint32_t nNonce, uint32_t nBits
     return CreateGenesisBlock(pszTimestamp, genesisOutputScript, nTime, nNonce, nBits, nVersion, genesisReward);
 }
 
-void CChainParams::UpdateVersionBitsParameters(Consensus::DeploymentPos d, int64_t nStartTime, int64_t nTimeout)
-{
-    consensus.vDeployments[d].nStartTime = nStartTime;
-    consensus.vDeployments[d].nTimeout = nTimeout;
-}
-
 /**
  * Main network
  */
@@ -270,7 +268,7 @@ public:
  */
 class CRegTestParams : public CChainParams {
 public:
-    CRegTestParams() {
+    explicit CRegTestParams(const ArgsManager& args) {
         strNetworkID = "regtest";
         consensus.nSubsidyHalvingInterval = 150;
         consensus.BIP16Exception = uint256();
@@ -308,6 +306,8 @@ public:
         nDefaultPort = 18444;
         nPruneAfterHeight = 1000;
 
+        UpdateVersionBitsParametersFromArgs(args);
+
         genesis = CreateGenesisBlock(1296688602, 2, 0x207fffff, 1, 50 * COIN);
         consensus.hashGenesisBlock = genesis.GetHash();
         assert(consensus.hashGenesisBlock == uint256S("0x0f9188f13cb7b2c71f2a335e3a4fc328bf5beb436012afca590b1a11466e2206"));
@@ -343,23 +343,65 @@ public:
         /* enable fallback fee on regtest */
         m_fallback_fee_enabled = true;
     }
+
+    /**
+     * Allows modifying the Version Bits regtest parameters.
+     */
+    void UpdateVersionBitsParameters(Consensus::DeploymentPos d, int64_t nStartTime, int64_t nTimeout)
+    {
+        consensus.vDeployments[d].nStartTime = nStartTime;
+        consensus.vDeployments[d].nTimeout = nTimeout;
+    }
+    void UpdateVersionBitsParametersFromArgs(const ArgsManager& args);
 };
 
-static std::unique_ptr<CChainParams> globalChainParams;
+void CRegTestParams::UpdateVersionBitsParametersFromArgs(const ArgsManager& args)
+{
+    if (!args.IsArgSet("-vbparams")) return;
+
+    for (const std::string& strDeployment : args.GetArgs("-vbparams")) {
+        std::vector<std::string> vDeploymentParams;
+        boost::split(vDeploymentParams, strDeployment, boost::is_any_of(":"));
+        if (vDeploymentParams.size() != 3) {
+            throw std::runtime_error("Version bits parameters malformed, expecting deployment:start:end");
+        }
+        int64_t nStartTime, nTimeout;
+        if (!ParseInt64(vDeploymentParams[1], &nStartTime)) {
+            throw std::runtime_error(strprintf("Invalid nStartTime (%s)", vDeploymentParams[1]));
+        }
+        if (!ParseInt64(vDeploymentParams[2], &nTimeout)) {
+            throw std::runtime_error(strprintf("Invalid nTimeout (%s)", vDeploymentParams[2]));
+        }
+        bool found = false;
+        for (int j=0; j < (int)Consensus::MAX_VERSION_BITS_DEPLOYMENTS; ++j) {
+            if (vDeploymentParams[0] == VersionBitsDeploymentInfo[j].name) {
+                UpdateVersionBitsParameters(Consensus::DeploymentPos(j), nStartTime, nTimeout);
+                found = true;
+                LogPrintf("Setting version bits activation parameters for %s to start=%ld, timeout=%ld\n", vDeploymentParams[0], nStartTime, nTimeout);
+                break;
+            }
+        }
+        if (!found) {
+            throw std::runtime_error(strprintf("Invalid deployment (%s)", vDeploymentParams[0]));
+        }
+    }
+}
+
+static std::unique_ptr<const CChainParams> globalChainParams;
 
 const CChainParams &Params() {
     assert(globalChainParams);
     return *globalChainParams;
 }
 
-std::unique_ptr<CChainParams> CreateChainParams(const std::string& chain)
+std::unique_ptr<const CChainParams> CreateChainParams(const std::string& chain)
 {
     if (chain == CBaseChainParams::MAIN)
         return std::unique_ptr<CChainParams>(new CMainParams());
     else if (chain == CBaseChainParams::TESTNET)
         return std::unique_ptr<CChainParams>(new CTestNetParams());
     else if (chain == CBaseChainParams::REGTEST)
-        return std::unique_ptr<CChainParams>(new CRegTestParams());
+        return std::unique_ptr<CChainParams>(new CRegTestParams(gArgs));
     throw std::runtime_error(strprintf("%s: Unknown chain %s.", __func__, chain));
 }
 
@@ -368,8 +410,3 @@ void SelectParams(const std::string& network)
     SelectBaseParams(network);
     globalChainParams = CreateChainParams(network);
 }
-
-void UpdateVersionBitsParameters(Consensus::DeploymentPos d, int64_t nStartTime, int64_t nTimeout)
-{
-    globalChainParams->UpdateVersionBitsParameters(d, nStartTime, nTimeout);
-}
diff --git a/src/chainparams.h b/src/chainparams.h
index 722e52ff40..19818b40af 100644
--- a/src/chainparams.h
+++ b/src/chainparams.h
@@ -80,7 +80,6 @@ public:
     const std::vector<SeedSpec6>& FixedSeeds() const { return vFixedSeeds; }
     const CCheckpointData& Checkpoints() const { return checkpointData; }
     const ChainTxData& TxData() const { return chainTxData; }
-    void UpdateVersionBitsParameters(Consensus::DeploymentPos d, int64_t nStartTime, int64_t nTimeout);
 protected:
     CChainParams() {}
 
@@ -107,7 +106,7 @@ protected:
  * @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);
+std::unique_ptr<const CChainParams> CreateChainParams(const std::string& chain);
 
 /**
  * Return the currently selected parameters. This won't change after app
@@ -121,9 +120,4 @@ const CChainParams &Params();
  */
 void SelectParams(const std::string& chain);
 
-/**
- * Allows modifying the Version Bits regtest parameters.
- */
-void UpdateVersionBitsParameters(Consensus::DeploymentPos d, int64_t nStartTime, int64_t nTimeout);
-
 #endif // BITCOIN_CHAINPARAMS_H
diff --git a/src/chainparamsbase.cpp b/src/chainparamsbase.cpp
index e9e8ce03b4..870640e77d 100644
--- a/src/chainparamsbase.cpp
+++ b/src/chainparamsbase.cpp
@@ -20,6 +20,7 @@ void SetupChainParamsBaseOptions()
     gArgs.AddArg("-regtest", "Enter regression test mode, which uses a special chain in which blocks can be solved instantly. "
                                    "This is intended for regression testing tools and app development.", true, OptionsCategory::CHAINPARAMS);
     gArgs.AddArg("-testnet", "Use the test chain", false, OptionsCategory::CHAINPARAMS);
+    gArgs.AddArg("-vbparams=deployment:start:end", "Use given start/end times for specified version bits deployment (regtest-only)", true, OptionsCategory::CHAINPARAMS);
 }
 
 static std::unique_ptr<CBaseChainParams> globalChainBaseParams;
diff --git a/src/init.cpp b/src/init.cpp
index d10edbd8b6..00d97629f7 100644
--- a/src/init.cpp
+++ b/src/init.cpp
@@ -445,7 +445,6 @@ void SetupServerArgs()
     gArgs.AddArg("-limitancestorsize=<n>", strprintf("Do not accept transactions whose size with all in-mempool ancestors exceeds <n> kilobytes (default: %u)", DEFAULT_ANCESTOR_SIZE_LIMIT), true, OptionsCategory::DEBUG_TEST);
     gArgs.AddArg("-limitdescendantcount=<n>", strprintf("Do not accept transactions if any ancestor would have <n> or more in-mempool descendants (default: %u)", DEFAULT_DESCENDANT_LIMIT), true, OptionsCategory::DEBUG_TEST);
     gArgs.AddArg("-limitdescendantsize=<n>", strprintf("Do not accept transactions if any ancestor would have more than <n> kilobytes of in-mempool descendants (default: %u).", DEFAULT_DESCENDANT_SIZE_LIMIT), true, OptionsCategory::DEBUG_TEST);
-    gArgs.AddArg("-vbparams=deployment:start:end", "Use given start/end times for specified version bits deployment (regtest-only)", true, OptionsCategory::DEBUG_TEST);
     gArgs.AddArg("-addrmantest", "Allows to test address relay on localhost", true, OptionsCategory::DEBUG_TEST);
     gArgs.AddArg("-debug=<category>", "Output debugging information (default: -nodebug, supplying <category> is optional). "
         "If <category> is not supplied or if <category> = 1, output all debugging information. <category> can be: " + ListLogCategories() + ".", false, OptionsCategory::DEBUG_TEST);
@@ -1101,39 +1100,6 @@ bool AppInitParameterInteraction()
         fEnableReplacement = (std::find(vstrReplacementModes.begin(), vstrReplacementModes.end(), "fee") != vstrReplacementModes.end());
     }
 
-    if (gArgs.IsArgSet("-vbparams")) {
-        // Allow overriding version bits parameters for testing
-        if (!chainparams.MineBlocksOnDemand()) {
-            return InitError("Version bits parameters may only be overridden on regtest.");
-        }
-        for (const std::string& strDeployment : gArgs.GetArgs("-vbparams")) {
-            std::vector<std::string> vDeploymentParams;
-            boost::split(vDeploymentParams, strDeployment, boost::is_any_of(":"));
-            if (vDeploymentParams.size() != 3) {
-                return InitError("Version bits parameters malformed, expecting deployment:start:end");
-            }
-            int64_t nStartTime, nTimeout;
-            if (!ParseInt64(vDeploymentParams[1], &nStartTime)) {
-                return InitError(strprintf("Invalid nStartTime (%s)", vDeploymentParams[1]));
-            }
-            if (!ParseInt64(vDeploymentParams[2], &nTimeout)) {
-                return InitError(strprintf("Invalid nTimeout (%s)", vDeploymentParams[2]));
-            }
-            bool found = false;
-            for (int j=0; j<(int)Consensus::MAX_VERSION_BITS_DEPLOYMENTS; ++j)
-            {
-                if (vDeploymentParams[0].compare(VersionBitsDeploymentInfo[j].name) == 0) {
-                    UpdateVersionBitsParameters(Consensus::DeploymentPos(j), nStartTime, nTimeout);
-                    found = true;
-                    LogPrintf("Setting version bits activation parameters for %s to start=%ld, timeout=%ld\n", vDeploymentParams[0], nStartTime, nTimeout);
-                    break;
-                }
-            }
-            if (!found) {
-                return InitError(strprintf("Invalid deployment (%s)", vDeploymentParams[0]));
-            }
-        }
-    }
     return true;
 }
 
diff --git a/src/rpc/blockchain.cpp b/src/rpc/blockchain.cpp
index 47ee4fd6db..1eca0277b0 100644
--- a/src/rpc/blockchain.cpp
+++ b/src/rpc/blockchain.cpp
@@ -30,6 +30,7 @@
 #include <utilstrencodings.h>
 #include <hash.h>
 #include <validationinterface.h>
+#include <versionbitsinfo.h>
 #include <warnings.h>
 
 #include <assert.h>
diff --git a/src/rpc/mining.cpp b/src/rpc/mining.cpp
index 17695ff4af..1b2fc2c156 100644
--- a/src/rpc/mining.cpp
+++ b/src/rpc/mining.cpp
@@ -24,6 +24,7 @@
 #include <utilstrencodings.h>
 #include <validation.h>
 #include <validationinterface.h>
+#include <versionbitsinfo.h>
 #include <warnings.h>
 
 #include <memory>
diff --git a/src/test/test_bitcoin.cpp b/src/test/test_bitcoin.cpp
index 766e34e5b5..f7874e6882 100644
--- a/src/test/test_bitcoin.cpp
+++ b/src/test/test_bitcoin.cpp
@@ -6,6 +6,7 @@
 
 #include <chainparams.h>
 #include <consensus/consensus.h>
+#include <consensus/params.h>
 #include <consensus/validation.h>
 #include <crypto/sha256.h>
 #include <miner.h>
@@ -58,6 +59,9 @@ BasicTestingSetup::BasicTestingSetup(const std::string& chainName)
     InitSignatureCache();
     InitScriptExecutionCache();
     fCheckBlockIndex = true;
+    // CreateAndProcessBlock() does not support building SegWit blocks, so don't activate in these tests.
+    // TODO: fix the code to support SegWit blocks.
+    gArgs.ForceSetArg("-vbparams", strprintf("segwit:0:%d", (int64_t)Consensus::BIP9Deployment::NO_TIMEOUT));
     SelectParams(chainName);
     noui_connect();
 }
@@ -128,9 +132,6 @@ TestingSetup::~TestingSetup()
 
 TestChain100Setup::TestChain100Setup() : TestingSetup(CBaseChainParams::REGTEST)
 {
-    // CreateAndProcessBlock() does not support building SegWit blocks, so don't activate in these tests.
-    // TODO: fix the code to support SegWit blocks.
-    UpdateVersionBitsParameters(Consensus::DEPLOYMENT_SEGWIT, 0, Consensus::BIP9Deployment::NO_TIMEOUT);
     // Generate a 100-block chain:
     coinbaseKey.MakeNewKey(true);
     CScript scriptPubKey = CScript() <<  ToByteVector(coinbaseKey.GetPubKey()) << OP_CHECKSIG;
diff --git a/src/versionbits.cpp b/src/versionbits.cpp
index b0d2bc8a14..3f297c0ebb 100644
--- a/src/versionbits.cpp
+++ b/src/versionbits.cpp
@@ -5,21 +5,6 @@
 #include <versionbits.h>
 #include <consensus/params.h>
 
-const struct VBDeploymentInfo VersionBitsDeploymentInfo[Consensus::MAX_VERSION_BITS_DEPLOYMENTS] = {
-    {
-        /*.name =*/ "testdummy",
-        /*.gbt_force =*/ true,
-    },
-    {
-        /*.name =*/ "csv",
-        /*.gbt_force =*/ true,
-    },
-    {
-        /*.name =*/ "segwit",
-        /*.gbt_force =*/ true,
-    }
-};
-
 ThresholdState AbstractThresholdConditionChecker::GetStateFor(const CBlockIndex* pindexPrev, const Consensus::Params& params, ThresholdConditionCache& cache) const
 {
     int nPeriod = Period(params);
diff --git a/src/versionbits.h b/src/versionbits.h
index e4bf9cb9be..cdc947cd9e 100644
--- a/src/versionbits.h
+++ b/src/versionbits.h
@@ -30,13 +30,6 @@ enum class ThresholdState {
 // will either be nullptr or a block with (height + 1) % Period() == 0.
 typedef std::map<const CBlockIndex*, ThresholdState> ThresholdConditionCache;
 
-struct VBDeploymentInfo {
-    /** Deployment name */
-    const char *name;
-    /** Whether GBT clients can safely ignore this rule in simplified usage */
-    bool gbt_force;
-};
-
 struct BIP9Stats {
     int period;
     int threshold;
@@ -45,8 +38,6 @@ struct BIP9Stats {
     bool possible;
 };
 
-extern const struct VBDeploymentInfo VersionBitsDeploymentInfo[];
-
 /**
  * Abstract class that implements BIP9-style threshold logic, and caches results.
  */
diff --git a/src/versionbitsinfo.cpp b/src/versionbitsinfo.cpp
new file mode 100644
index 0000000000..ecf3482927
--- /dev/null
+++ b/src/versionbitsinfo.cpp
@@ -0,0 +1,22 @@
+// Copyright (c) 2016-2018 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#include <versionbitsinfo.h>
+
+#include <consensus/params.h>
+
+const struct VBDeploymentInfo VersionBitsDeploymentInfo[Consensus::MAX_VERSION_BITS_DEPLOYMENTS] = {
+    {
+        /*.name =*/ "testdummy",
+        /*.gbt_force =*/ true,
+    },
+    {
+        /*.name =*/ "csv",
+        /*.gbt_force =*/ true,
+    },
+    {
+        /*.name =*/ "segwit",
+        /*.gbt_force =*/ true,
+    }
+};
diff --git a/src/versionbitsinfo.h b/src/versionbitsinfo.h
new file mode 100644
index 0000000000..a7822bc747
--- /dev/null
+++ b/src/versionbitsinfo.h
@@ -0,0 +1,17 @@
+// Copyright (c) 2016-2018 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#ifndef BITCOIN_VERSIONBITSINFO_H
+#define BITCOIN_VERSIONBITSINFO_H
+
+struct VBDeploymentInfo {
+    /** Deployment name */
+    const char *name;
+    /** Whether GBT clients can safely ignore this rule in simplified usage */
+    bool gbt_force;
+};
+
+extern const struct VBDeploymentInfo VersionBitsDeploymentInfo[];
+
+#endif // BITCOIN_VERSIONBITSINFO_H