Merge #20004: test: Add signet witness commitment section parse tests

fa29b5ae666bbb4c19188f0dcf8a1ba738aac624 test: Add signet witness commitment section parse tests (MarcoFalke)
fa23308e9aad70c99a31f91d8556f1876ea02c04 Remove gArgs global from CreateChainParams to aid testing (MarcoFalke)

Pull request description:

ACKs for top commit:
  laanwj:
    ACK fa29b5ae666bbb4c19188f0dcf8a1ba738aac624

Tree-SHA512: f956407d690decbfb8178bcb8f101d107389fecc3aa7be515f7b0f5ceac26d798c165100f7ddf08cec569beabcc6514862dda23b667cc4fd0a784316784735c2

9 files changed, 96 insertions, 33 deletions

diff --git a/src/bench/checkblock.cpp b/src/bench/checkblock.cpp
index dc0aa4031c..a9f3f5f84d 100644
--- a/src/bench/checkblock.cpp
+++ b/src/bench/checkblock.cpp
@@ -34,7 +34,8 @@ static void DeserializeAndCheckBlockTest(benchmark::Bench& bench)
     char a = '\0';
     stream.write(&a, 1); // Prevent compaction
 
-    const auto chainParams = CreateChainParams(CBaseChainParams::MAIN);
+    ArgsManager bench_args;
+    const auto chainParams = CreateChainParams(bench_args, CBaseChainParams::MAIN);
 
     bench.unit("block").run([&] {
         CBlock block; // Note that CBlock caches its checked state, so we need to recreate it here
diff --git a/src/chainparams.cpp b/src/chainparams.cpp
index 59bce33168..931c2b5297 100644
--- a/src/chainparams.cpp
+++ b/src/chainparams.cpp
@@ -495,16 +495,16 @@ const CChainParams &Params() {
     return *globalChainParams;
 }
 
-std::unique_ptr<const CChainParams> CreateChainParams(const std::string& chain)
+std::unique_ptr<const CChainParams> CreateChainParams(const ArgsManager& args, 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::SIGNET) {
-        return std::unique_ptr<CChainParams>(new SigNetParams(gArgs));
+        return std::unique_ptr<CChainParams>(new SigNetParams(args));
     } else if (chain == CBaseChainParams::REGTEST) {
-        return std::unique_ptr<CChainParams>(new CRegTestParams(gArgs));
+        return std::unique_ptr<CChainParams>(new CRegTestParams(args));
     }
     throw std::runtime_error(strprintf("%s: Unknown chain %s.", __func__, chain));
 }
@@ -512,5 +512,5 @@ std::unique_ptr<const CChainParams> CreateChainParams(const std::string& chain)
 void SelectParams(const std::string& network)
 {
     SelectBaseParams(network);
-    globalChainParams = CreateChainParams(network);
+    globalChainParams = CreateChainParams(gArgs, network);
 }
diff --git a/src/chainparams.h b/src/chainparams.h
index 7aa999fb75..d8b25c7220 100644
--- a/src/chainparams.h
+++ b/src/chainparams.h
@@ -119,7 +119,7 @@ protected:
  * @returns a CChainParams* of the chosen chain.
  * @throws a std::runtime_error if the chain is not supported.
  */
-std::unique_ptr<const CChainParams> CreateChainParams(const std::string& chain);
+std::unique_ptr<const CChainParams> CreateChainParams(const ArgsManager& args, const std::string& chain);
 
 /**
  * Return the currently selected parameters. This won't change after app
diff --git a/src/init.cpp b/src/init.cpp
index c517b04d68..dea5f097e5 100644
--- a/src/init.cpp
+++ b/src/init.cpp
@@ -380,10 +380,10 @@ void SetupServerArgs(NodeContext& node)
     const auto testnetBaseParams = CreateBaseChainParams(CBaseChainParams::TESTNET);
     const auto signetBaseParams = CreateBaseChainParams(CBaseChainParams::SIGNET);
     const auto regtestBaseParams = CreateBaseChainParams(CBaseChainParams::REGTEST);
-    const auto defaultChainParams = CreateChainParams(CBaseChainParams::MAIN);
-    const auto testnetChainParams = CreateChainParams(CBaseChainParams::TESTNET);
-    const auto signetChainParams = CreateChainParams(CBaseChainParams::SIGNET);
-    const auto regtestChainParams = CreateChainParams(CBaseChainParams::REGTEST);
+    const auto defaultChainParams = CreateChainParams(argsman, CBaseChainParams::MAIN);
+    const auto testnetChainParams = CreateChainParams(argsman, CBaseChainParams::TESTNET);
+    const auto signetChainParams = CreateChainParams(argsman, CBaseChainParams::SIGNET);
+    const auto regtestChainParams = CreateChainParams(argsman, CBaseChainParams::REGTEST);
 
     // Hidden Options
     std::vector<std::string> hidden_args = {
diff --git a/src/qt/paymentserver.cpp b/src/qt/paymentserver.cpp
index 8679ced685..6c2db52f63 100644
--- a/src/qt/paymentserver.cpp
+++ b/src/qt/paymentserver.cpp
@@ -94,12 +94,12 @@ void PaymentServer::ipcParseCommandLine(int argc, char* argv[])
             SendCoinsRecipient r;
             if (GUIUtil::parseBitcoinURI(arg, &r) && !r.address.isEmpty())
             {
-                auto tempChainParams = CreateChainParams(CBaseChainParams::MAIN);
+                auto tempChainParams = CreateChainParams(gArgs, CBaseChainParams::MAIN);
 
                 if (IsValidDestinationString(r.address.toStdString(), *tempChainParams)) {
                     SelectParams(CBaseChainParams::MAIN);
                 } else {
-                    tempChainParams = CreateChainParams(CBaseChainParams::TESTNET);
+                    tempChainParams = CreateChainParams(gArgs, CBaseChainParams::TESTNET);
                     if (IsValidDestinationString(r.address.toStdString(), *tempChainParams)) {
                         SelectParams(CBaseChainParams::TESTNET);
                     }
diff --git a/src/test/miner_tests.cpp b/src/test/miner_tests.cpp
index 8686012af7..3de79a9f45 100644
--- a/src/test/miner_tests.cpp
+++ b/src/test/miner_tests.cpp
@@ -198,7 +198,7 @@ void MinerTestingSetup::TestPackageSelection(const CChainParams& chainparams, co
 BOOST_AUTO_TEST_CASE(CreateNewBlock_validity)
 {
     // Note that by default, these tests run with size accounting enabled.
-    const auto chainParams = CreateChainParams(CBaseChainParams::MAIN);
+    const auto chainParams = CreateChainParams(*m_node.args, CBaseChainParams::MAIN);
     const CChainParams& chainparams = *chainParams;
     CScript scriptPubKey = CScript() << ParseHex("04678afdb0fe5548271967f1a67130b7105cd6a828e03909a67962e0ea1f61deb649f6bc3f4cef38c4f35504e51ec112de5c384df7ba0b8d578a4c702b6bf11d5f") << OP_CHECKSIG;
     std::unique_ptr<CBlockTemplate> pblocktemplate;
diff --git a/src/test/pow_tests.cpp b/src/test/pow_tests.cpp
index ca49b89ad8..1d7f4861fb 100644
--- a/src/test/pow_tests.cpp
+++ b/src/test/pow_tests.cpp
@@ -14,7 +14,7 @@ BOOST_FIXTURE_TEST_SUITE(pow_tests, BasicTestingSetup)
 /* Test calculation of next difficulty target with no constraints applying */
 BOOST_AUTO_TEST_CASE(get_next_work)
 {
-    const auto chainParams = CreateChainParams(CBaseChainParams::MAIN);
+    const auto chainParams = CreateChainParams(*m_node.args, CBaseChainParams::MAIN);
     int64_t nLastRetargetTime = 1261130161; // Block #30240
     CBlockIndex pindexLast;
     pindexLast.nHeight = 32255;
@@ -26,7 +26,7 @@ BOOST_AUTO_TEST_CASE(get_next_work)
 /* Test the constraint on the upper bound for next work */
 BOOST_AUTO_TEST_CASE(get_next_work_pow_limit)
 {
-    const auto chainParams = CreateChainParams(CBaseChainParams::MAIN);
+    const auto chainParams = CreateChainParams(*m_node.args, CBaseChainParams::MAIN);
     int64_t nLastRetargetTime = 1231006505; // Block #0
     CBlockIndex pindexLast;
     pindexLast.nHeight = 2015;
@@ -38,7 +38,7 @@ BOOST_AUTO_TEST_CASE(get_next_work_pow_limit)
 /* Test the constraint on the lower bound for actual time taken */
 BOOST_AUTO_TEST_CASE(get_next_work_lower_limit_actual)
 {
-    const auto chainParams = CreateChainParams(CBaseChainParams::MAIN);
+    const auto chainParams = CreateChainParams(*m_node.args, CBaseChainParams::MAIN);
     int64_t nLastRetargetTime = 1279008237; // Block #66528
     CBlockIndex pindexLast;
     pindexLast.nHeight = 68543;
@@ -50,7 +50,7 @@ BOOST_AUTO_TEST_CASE(get_next_work_lower_limit_actual)
 /* Test the constraint on the upper bound for actual time taken */
 BOOST_AUTO_TEST_CASE(get_next_work_upper_limit_actual)
 {
-    const auto chainParams = CreateChainParams(CBaseChainParams::MAIN);
+    const auto chainParams = CreateChainParams(*m_node.args, CBaseChainParams::MAIN);
     int64_t nLastRetargetTime = 1263163443; // NOTE: Not an actual block time
     CBlockIndex pindexLast;
     pindexLast.nHeight = 46367;
@@ -61,7 +61,7 @@ BOOST_AUTO_TEST_CASE(get_next_work_upper_limit_actual)
 
 BOOST_AUTO_TEST_CASE(CheckProofOfWork_test_negative_target)
 {
-    const auto consensus = CreateChainParams(CBaseChainParams::MAIN)->GetConsensus();
+    const auto consensus = CreateChainParams(*m_node.args, CBaseChainParams::MAIN)->GetConsensus();
     uint256 hash;
     unsigned int nBits;
     nBits = UintToArith256(consensus.powLimit).GetCompact(true);
@@ -71,7 +71,7 @@ BOOST_AUTO_TEST_CASE(CheckProofOfWork_test_negative_target)
 
 BOOST_AUTO_TEST_CASE(CheckProofOfWork_test_overflow_target)
 {
-    const auto consensus = CreateChainParams(CBaseChainParams::MAIN)->GetConsensus();
+    const auto consensus = CreateChainParams(*m_node.args, CBaseChainParams::MAIN)->GetConsensus();
     uint256 hash;
     unsigned int nBits = ~0x00800000;
     hash.SetHex("0x1");
@@ -80,7 +80,7 @@ BOOST_AUTO_TEST_CASE(CheckProofOfWork_test_overflow_target)
 
 BOOST_AUTO_TEST_CASE(CheckProofOfWork_test_too_easy_target)
 {
-    const auto consensus = CreateChainParams(CBaseChainParams::MAIN)->GetConsensus();
+    const auto consensus = CreateChainParams(*m_node.args, CBaseChainParams::MAIN)->GetConsensus();
     uint256 hash;
     unsigned int nBits;
     arith_uint256 nBits_arith = UintToArith256(consensus.powLimit);
@@ -92,7 +92,7 @@ BOOST_AUTO_TEST_CASE(CheckProofOfWork_test_too_easy_target)
 
 BOOST_AUTO_TEST_CASE(CheckProofOfWork_test_biger_hash_than_target)
 {
-    const auto consensus = CreateChainParams(CBaseChainParams::MAIN)->GetConsensus();
+    const auto consensus = CreateChainParams(*m_node.args, CBaseChainParams::MAIN)->GetConsensus();
     uint256 hash;
     unsigned int nBits;
     arith_uint256 hash_arith = UintToArith256(consensus.powLimit);
@@ -104,7 +104,7 @@ BOOST_AUTO_TEST_CASE(CheckProofOfWork_test_biger_hash_than_target)
 
 BOOST_AUTO_TEST_CASE(CheckProofOfWork_test_zero_target)
 {
-    const auto consensus = CreateChainParams(CBaseChainParams::MAIN)->GetConsensus();
+    const auto consensus = CreateChainParams(*m_node.args, CBaseChainParams::MAIN)->GetConsensus();
     uint256 hash;
     unsigned int nBits;
     arith_uint256 hash_arith{0};
@@ -115,7 +115,7 @@ BOOST_AUTO_TEST_CASE(CheckProofOfWork_test_zero_target)
 
 BOOST_AUTO_TEST_CASE(GetBlockProofEquivalentTime_test)
 {
-    const auto chainParams = CreateChainParams(CBaseChainParams::MAIN);
+    const auto chainParams = CreateChainParams(*m_node.args, CBaseChainParams::MAIN);
     std::vector<CBlockIndex> blocks(10000);
     for (int i = 0; i < 10000; i++) {
         blocks[i].pprev = i ? &blocks[i - 1] : nullptr;
@@ -135,9 +135,9 @@ BOOST_AUTO_TEST_CASE(GetBlockProofEquivalentTime_test)
     }
 }
 
-void sanity_check_chainparams(std::string chainName)
+void sanity_check_chainparams(const ArgsManager& args, std::string chainName)
 {
-    const auto chainParams = CreateChainParams(chainName);
+    const auto chainParams = CreateChainParams(args, chainName);
     const auto consensus = chainParams->GetConsensus();
 
     // hash genesis is correct
@@ -164,22 +164,22 @@ void sanity_check_chainparams(std::string chainName)
 
 BOOST_AUTO_TEST_CASE(ChainParams_MAIN_sanity)
 {
-    sanity_check_chainparams(CBaseChainParams::MAIN);
+    sanity_check_chainparams(*m_node.args, CBaseChainParams::MAIN);
 }
 
 BOOST_AUTO_TEST_CASE(ChainParams_REGTEST_sanity)
 {
-    sanity_check_chainparams(CBaseChainParams::REGTEST);
+    sanity_check_chainparams(*m_node.args, CBaseChainParams::REGTEST);
 }
 
 BOOST_AUTO_TEST_CASE(ChainParams_TESTNET_sanity)
 {
-    sanity_check_chainparams(CBaseChainParams::TESTNET);
+    sanity_check_chainparams(*m_node.args, CBaseChainParams::TESTNET);
 }
 
 BOOST_AUTO_TEST_CASE(ChainParams_SIGNET_sanity)
 {
-    sanity_check_chainparams(CBaseChainParams::SIGNET);
+    sanity_check_chainparams(*m_node.args, CBaseChainParams::SIGNET);
 }
 
 BOOST_AUTO_TEST_SUITE_END()
diff --git a/src/test/validation_tests.cpp b/src/test/validation_tests.cpp
index 3b961db52d..a9ece50136 100644
--- a/src/test/validation_tests.cpp
+++ b/src/test/validation_tests.cpp
@@ -4,6 +4,7 @@
 
 #include <chainparams.h>
 #include <net.h>
+#include <signet.h>
 #include <validation.h>
 
 #include <test/util/setup_common.h>
@@ -39,7 +40,7 @@ static void TestBlockSubsidyHalvings(int nSubsidyHalvingInterval)
 
 BOOST_AUTO_TEST_CASE(block_subsidy_test)
 {
-    const auto chainParams = CreateChainParams(CBaseChainParams::MAIN);
+    const auto chainParams = CreateChainParams(*m_node.args, CBaseChainParams::MAIN);
     TestBlockSubsidyHalvings(chainParams->GetConsensus()); // As in main
     TestBlockSubsidyHalvings(150); // As in regtest
     TestBlockSubsidyHalvings(1000); // Just another interval
@@ -47,7 +48,7 @@ BOOST_AUTO_TEST_CASE(block_subsidy_test)
 
 BOOST_AUTO_TEST_CASE(subsidy_limit_test)
 {
-    const auto chainParams = CreateChainParams(CBaseChainParams::MAIN);
+    const auto chainParams = CreateChainParams(*m_node.args, CBaseChainParams::MAIN);
     CAmount nSum = 0;
     for (int nHeight = 0; nHeight < 14000000; nHeight += 1000) {
         CAmount nSubsidy = GetBlockSubsidy(nHeight, chainParams->GetConsensus());
@@ -58,6 +59,67 @@ BOOST_AUTO_TEST_CASE(subsidy_limit_test)
     BOOST_CHECK_EQUAL(nSum, CAmount{2099999997690000});
 }
 
+BOOST_AUTO_TEST_CASE(signet_parse_tests)
+{
+    ArgsManager signet_argsman;
+    signet_argsman.ForceSetArg("-signetchallenge", "51"); // set challenge to OP_TRUE
+    const auto signet_params = CreateChainParams(signet_argsman, CBaseChainParams::SIGNET);
+    CBlock block;
+    BOOST_CHECK(signet_params->GetConsensus().signet_challenge == std::vector<uint8_t>{{OP_TRUE}});
+    CScript challenge{OP_TRUE};
+
+    // empty block is invalid
+    BOOST_CHECK(!SignetTxs::Create(block, challenge));
+    BOOST_CHECK(!CheckSignetBlockSolution(block, signet_params->GetConsensus()));
+
+    // no witness commitment
+    CMutableTransaction cb;
+    cb.vout.emplace_back(0, CScript{});
+    block.vtx.push_back(MakeTransactionRef(cb));
+    block.vtx.push_back(MakeTransactionRef(cb)); // Add dummy tx to excercise merkle root code
+    BOOST_CHECK(!SignetTxs::Create(block, challenge));
+    BOOST_CHECK(!CheckSignetBlockSolution(block, signet_params->GetConsensus()));
+
+    // no header is treated valid
+    std::vector<uint8_t> witness_commitment_section_141{0xaa, 0x21, 0xa9, 0xed};
+    for (int i = 0; i < 32; ++i) {
+        witness_commitment_section_141.push_back(0xff);
+    }
+    cb.vout.at(0).scriptPubKey = CScript{} << OP_RETURN << witness_commitment_section_141;
+    block.vtx.at(0) = MakeTransactionRef(cb);
+    BOOST_CHECK(SignetTxs::Create(block, challenge));
+    BOOST_CHECK(CheckSignetBlockSolution(block, signet_params->GetConsensus()));
+
+    // no data after header, valid
+    std::vector<uint8_t> witness_commitment_section_325{0xec, 0xc7, 0xda, 0xa2};
+    cb.vout.at(0).scriptPubKey = CScript{} << OP_RETURN << witness_commitment_section_141 << witness_commitment_section_325;
+    block.vtx.at(0) = MakeTransactionRef(cb);
+    BOOST_CHECK(SignetTxs::Create(block, challenge));
+    BOOST_CHECK(CheckSignetBlockSolution(block, signet_params->GetConsensus()));
+
+    // Premature end of data, invalid
+    witness_commitment_section_325.push_back(0x01);
+    witness_commitment_section_325.push_back(0x51);
+    cb.vout.at(0).scriptPubKey = CScript{} << OP_RETURN << witness_commitment_section_141 << witness_commitment_section_325;
+    block.vtx.at(0) = MakeTransactionRef(cb);
+    BOOST_CHECK(!SignetTxs::Create(block, challenge));
+    BOOST_CHECK(!CheckSignetBlockSolution(block, signet_params->GetConsensus()));
+
+    // has data, valid
+    witness_commitment_section_325.push_back(0x00);
+    cb.vout.at(0).scriptPubKey = CScript{} << OP_RETURN << witness_commitment_section_141 << witness_commitment_section_325;
+    block.vtx.at(0) = MakeTransactionRef(cb);
+    BOOST_CHECK(SignetTxs::Create(block, challenge));
+    BOOST_CHECK(CheckSignetBlockSolution(block, signet_params->GetConsensus()));
+
+    // Extraneous data, invalid
+    witness_commitment_section_325.push_back(0x00);
+    cb.vout.at(0).scriptPubKey = CScript{} << OP_RETURN << witness_commitment_section_141 << witness_commitment_section_325;
+    block.vtx.at(0) = MakeTransactionRef(cb);
+    BOOST_CHECK(!SignetTxs::Create(block, challenge));
+    BOOST_CHECK(!CheckSignetBlockSolution(block, signet_params->GetConsensus()));
+}
+
 static bool ReturnFalse() { return false; }
 static bool ReturnTrue() { return true; }
 
diff --git a/src/test/versionbits_tests.cpp b/src/test/versionbits_tests.cpp
index 11c6bdad91..50444f7bbe 100644
--- a/src/test/versionbits_tests.cpp
+++ b/src/test/versionbits_tests.cpp
@@ -223,7 +223,7 @@ BOOST_AUTO_TEST_CASE(versionbits_test)
     }
 
     // Sanity checks of version bit deployments
-    const auto chainParams = CreateChainParams(CBaseChainParams::MAIN);
+    const auto chainParams = CreateChainParams(*m_node.args, 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, static_cast<Consensus::DeploymentPos>(i));
@@ -250,7 +250,7 @@ BOOST_AUTO_TEST_CASE(versionbits_computeblockversion)
 {
     // Check that ComputeBlockVersion will set the appropriate bit correctly
     // on mainnet.
-    const auto chainParams = CreateChainParams(CBaseChainParams::MAIN);
+    const auto chainParams = CreateChainParams(*m_node.args, CBaseChainParams::MAIN);
     const Consensus::Params &mainnetParams = chainParams->GetConsensus();
 
     // Use the TESTDUMMY deployment for testing purposes.