text: // Copyright (c) 2011-2019 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 <chainparams.h>
  #include <coins.h>
  #include <consensus/consensus.h>
  #include <consensus/merkle.h>
  #include <consensus/tx_verify.h>
  #include <miner.h>
  #include <policy/policy.h>
  #include <script/standard.h>
  #include <txmempool.h>
  #include <uint256.h>
  #include <util/strencodings.h>
  #include <util/system.h>
  #include <util/time.h>
  #include <validation.h>
  
  #include <test/util/setup_common.h>
  
  #include <memory>
  
  #include <boost/test/unit_test.hpp>
  
  namespace miner_tests {
  struct MinerTestingSetup : public TestingSetup {
      void TestPackageSelection(const CChainParams& chainparams, const CScript& scriptPubKey, const std::vector<CTransactionRef>& txFirst) EXCLUSIVE_LOCKS_REQUIRED(::cs_main, m_node.mempool->cs);
      bool TestSequenceLocks(const CTransaction& tx, int flags) EXCLUSIVE_LOCKS_REQUIRED(::cs_main, m_node.mempool->cs)
      {
          return CheckSequenceLocks(*m_node.mempool, tx, flags);
      }
      BlockAssembler AssemblerForTest(const CChainParams& params);
  };
  } // namespace miner_tests
  
  BOOST_FIXTURE_TEST_SUITE(miner_tests, MinerTestingSetup)
  
  static CFeeRate blockMinFeeRate = CFeeRate(DEFAULT_BLOCK_MIN_TX_FEE);
  
  BlockAssembler MinerTestingSetup::AssemblerForTest(const CChainParams& params)
  {
      BlockAssembler::Options options;
  
      options.nBlockMaxWeight = MAX_BLOCK_WEIGHT;
      options.blockMinFeeRate = blockMinFeeRate;
      return BlockAssembler(*m_node.mempool, params, options);
  }
  
  constexpr static struct {
      unsigned char extranonce;
      unsigned int nonce;
  } blockinfo[] = {
      {4, 0xa4a3e223}, {2, 0x15c32f9e}, {1, 0x0375b547}, {1, 0x7004a8a5},
      {2, 0xce440296}, {2, 0x52cfe198}, {1, 0x77a72cd0}, {2, 0xbb5d6f84},
      {2, 0x83f30c2c}, {1, 0x48a73d5b}, {1, 0xef7dcd01}, {2, 0x6809c6c4},
      {2, 0x0883ab3c}, {1, 0x087bbbe2}, {2, 0x2104a814}, {2, 0xdffb6daa},
      {1, 0xee8a0a08}, {2, 0xba4237c1}, {1, 0xa70349dc}, {1, 0x344722bb},
      {3, 0xd6294733}, {2, 0xec9f5c94}, {2, 0xca2fbc28}, {1, 0x6ba4f406},
      {2, 0x015d4532}, {1, 0x6e119b7c}, {2, 0x43e8f314}, {2, 0x27962f38},
      {2, 0xb571b51b}, {2, 0xb36bee23}, {2, 0xd17924a8}, {2, 0x6bc212d9},
      {1, 0x630d4948}, {2, 0x9a4c4ebb}, {2, 0x554be537}, {1, 0xd63ddfc7},
      {2, 0xa10acc11}, {1, 0x759a8363}, {2, 0xfb73090d}, {1, 0xe82c6a34},
      {1, 0xe33e92d7}, {3, 0x658ef5cb}, {2, 0xba32ff22}, {5, 0x0227a10c},
      {1, 0xa9a70155}, {5, 0xd096d809}, {1, 0x37176174}, {1, 0x830b8d0f},
      {1, 0xc6e3910e}, {2, 0x823f3ca8}, {1, 0x99850849}, {1, 0x7521fb81},
      {1, 0xaacaabab}, {1, 0xd645a2eb}, {5, 0x7aea1781}, {5, 0x9d6e4b78},
      {1, 0x4ce90fd8}, {1, 0xabdc832d}, {6, 0x4a34f32a}, {2, 0xf2524c1c},
      {2, 0x1bbeb08a}, {1, 0xad47f480}, {1, 0x9f026aeb}, {1, 0x15a95049},
      {2, 0xd1cb95b2}, {2, 0xf84bbda5}, {1, 0x0fa62cd1}, {1, 0xe05f9169},
      {1, 0x78d194a9}, {5, 0x3e38147b}, {5, 0x737ba0d4}, {1, 0x63378e10},
      {1, 0x6d5f91cf}, {2, 0x88612eb8}, {2, 0xe9639484}, {1, 0xb7fabc9d},
      {2, 0x19b01592}, {1, 0x5a90dd31}, {2, 0x5bd7e028}, {2, 0x94d00323},
      {1, 0xa9b9c01a}, {1, 0x3a40de61}, {1, 0x56e7eec7}, {5, 0x859f7ef6},
      {1, 0xfd8e5630}, {1, 0x2b0c9f7f}, {1, 0xba700e26}, {1, 0x7170a408},
      {1, 0x70de86a8}, {1, 0x74d64cd5}, {1, 0x49e738a1}, {2, 0x6910b602},
      {0, 0x643c565f}, {1, 0x54264b3f}, {2, 0x97ea6396}, {2, 0x55174459},
      {2, 0x03e8779a}, {1, 0x98f34d8f}, {1, 0xc07b2b07}, {1, 0xdfe29668},
      {1, 0x3141c7c1}, {1, 0xb3b595f4}, {1, 0x735abf08}, {5, 0x623bfbce},
      {2, 0xd351e722}, {1, 0xf4ca48c9}, {1, 0x5b19c670}, {1, 0xa164bf0e},
      {2, 0xbbbeb305}, {2, 0xfe1c810a},
  };
  
  static CBlockIndex CreateBlockIndex(int nHeight) EXCLUSIVE_LOCKS_REQUIRED(cs_main)
  {
      CBlockIndex index;
      index.nHeight = nHeight;
      index.pprev = ::ChainActive().Tip();
      return index;
  }
  
  // Test suite for ancestor feerate transaction selection.
  // Implemented as an additional function, rather than a separate test case,
  // to allow reusing the blockchain created in CreateNewBlock_validity.
  void MinerTestingSetup::TestPackageSelection(const CChainParams& chainparams, const CScript& scriptPubKey, const std::vector<CTransactionRef>& txFirst)
  {
      // Test the ancestor feerate transaction selection.
      TestMemPoolEntryHelper entry;
  
      // Test that a medium fee transaction will be selected after a higher fee
      // rate package with a low fee rate parent.
      CMutableTransaction tx;
      tx.vin.resize(1);
      tx.vin[0].scriptSig = CScript() << OP_1;
      tx.vin[0].prevout.hash = txFirst[0]->GetHash();
      tx.vin[0].prevout.n = 0;
      tx.vout.resize(1);
      tx.vout[0].nValue = 5000000000LL - 1000;
      // This tx has a low fee: 1000 satoshis
      uint256 hashParentTx = tx.GetHash(); // save this txid for later use
      m_node.mempool->addUnchecked(entry.Fee(1000).Time(GetTime()).SpendsCoinbase(true).FromTx(tx));
  
      // This tx has a medium fee: 10000 satoshis
      tx.vin[0].prevout.hash = txFirst[1]->GetHash();
      tx.vout[0].nValue = 5000000000LL - 10000;
      uint256 hashMediumFeeTx = tx.GetHash();
      m_node.mempool->addUnchecked(entry.Fee(10000).Time(GetTime()).SpendsCoinbase(true).FromTx(tx));
  
      // This tx has a high fee, but depends on the first transaction
      tx.vin[0].prevout.hash = hashParentTx;
      tx.vout[0].nValue = 5000000000LL - 1000 - 50000; // 50k satoshi fee
      uint256 hashHighFeeTx = tx.GetHash();
      m_node.mempool->addUnchecked(entry.Fee(50000).Time(GetTime()).SpendsCoinbase(false).FromTx(tx));
  
      std::unique_ptr<CBlockTemplate> pblocktemplate = AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey);
      BOOST_CHECK(pblocktemplate->block.vtx[1]->GetHash() == hashParentTx);
      BOOST_CHECK(pblocktemplate->block.vtx[2]->GetHash() == hashHighFeeTx);
      BOOST_CHECK(pblocktemplate->block.vtx[3]->GetHash() == hashMediumFeeTx);
  
      // Test that a package below the block min tx fee doesn't get included
      tx.vin[0].prevout.hash = hashHighFeeTx;
      tx.vout[0].nValue = 5000000000LL - 1000 - 50000; // 0 fee
      uint256 hashFreeTx = tx.GetHash();
      m_node.mempool->addUnchecked(entry.Fee(0).FromTx(tx));
      size_t freeTxSize = ::GetSerializeSize(tx, PROTOCOL_VERSION);
  
      // Calculate a fee on child transaction that will put the package just
      // below the block min tx fee (assuming 1 child tx of the same size).
      CAmount feeToUse = blockMinFeeRate.GetFee(2*freeTxSize) - 1;
  
      tx.vin[0].prevout.hash = hashFreeTx;
      tx.vout[0].nValue = 5000000000LL - 1000 - 50000 - feeToUse;
      uint256 hashLowFeeTx = tx.GetHash();
      m_node.mempool->addUnchecked(entry.Fee(feeToUse).FromTx(tx));
      pblocktemplate = AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey);
      // Verify that the free tx and the low fee tx didn't get selected
      for (size_t i=0; i<pblocktemplate->block.vtx.size(); ++i) {
          BOOST_CHECK(pblocktemplate->block.vtx[i]->GetHash() != hashFreeTx);
          BOOST_CHECK(pblocktemplate->block.vtx[i]->GetHash() != hashLowFeeTx);
      }
  
      // Test that packages above the min relay fee do get included, even if one
      // of the transactions is below the min relay fee
      // Remove the low fee transaction and replace with a higher fee transaction
      m_node.mempool->removeRecursive(CTransaction(tx), MemPoolRemovalReason::REPLACED);
      tx.vout[0].nValue -= 2; // Now we should be just over the min relay fee
      hashLowFeeTx = tx.GetHash();
      m_node.mempool->addUnchecked(entry.Fee(feeToUse+2).FromTx(tx));
      pblocktemplate = AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey);
      BOOST_CHECK(pblocktemplate->block.vtx[4]->GetHash() == hashFreeTx);
      BOOST_CHECK(pblocktemplate->block.vtx[5]->GetHash() == hashLowFeeTx);
  
      // Test that transaction selection properly updates ancestor fee
      // calculations as ancestor transactions get included in a block.
      // Add a 0-fee transaction that has 2 outputs.
      tx.vin[0].prevout.hash = txFirst[2]->GetHash();
      tx.vout.resize(2);
      tx.vout[0].nValue = 5000000000LL - 100000000;
      tx.vout[1].nValue = 100000000; // 1DANE output
      uint256 hashFreeTx2 = tx.GetHash();
      m_node.mempool->addUnchecked(entry.Fee(0).SpendsCoinbase(true).FromTx(tx));
  
      // This tx can't be mined by itself
      tx.vin[0].prevout.hash = hashFreeTx2;
      tx.vout.resize(1);
      feeToUse = blockMinFeeRate.GetFee(freeTxSize);
      tx.vout[0].nValue = 5000000000LL - 100000000 - feeToUse;
      uint256 hashLowFeeTx2 = tx.GetHash();
      m_node.mempool->addUnchecked(entry.Fee(feeToUse).SpendsCoinbase(false).FromTx(tx));
      pblocktemplate = AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey);
  
      // Verify that this tx isn't selected.
      for (size_t i=0; i<pblocktemplate->block.vtx.size(); ++i) {
          BOOST_CHECK(pblocktemplate->block.vtx[i]->GetHash() != hashFreeTx2);
          BOOST_CHECK(pblocktemplate->block.vtx[i]->GetHash() != hashLowFeeTx2);
      }
  
      // This tx will be mineable, and should cause hashLowFeeTx2 to be selected
      // as well.
      tx.vin[0].prevout.n = 1;
      tx.vout[0].nValue = 100000000 - 10000; // 10k satoshi fee
      m_node.mempool->addUnchecked(entry.Fee(10000).FromTx(tx));
      pblocktemplate = AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey);
      BOOST_CHECK(pblocktemplate->block.vtx[8]->GetHash() == hashLowFeeTx2);
  }
  
  // NOTE: These tests rely on CreateNewBlock doing its own self-validation!
  BOOST_AUTO_TEST_CASE(CreateNewBlock_validity)
  {
      // Note that by default, these tests run with size accounting enabled.
      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;
      CMutableTransaction tx;
      CScript script;
      uint256 hash;
      TestMemPoolEntryHelper entry;
      entry.nFee = 11;
      entry.nHeight = 11;
  
      fCheckpointsEnabled = false;
  
      // Simple block creation, nothing special yet:
      BOOST_CHECK(pblocktemplate = AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey));
  
      // We can't make transactions until we have inputs
      // Therefore, load 110 blocks :)
      static_assert(sizeof(blockinfo) / sizeof(*blockinfo) == 110, "Should have 110 blocks to import");
      int baseheight = 0;
      std::vector<CTransactionRef> txFirst;
      for (unsigned int i = 0; i < sizeof(blockinfo)/sizeof(*blockinfo); ++i)
      {
          CBlock *pblock = &pblocktemplate->block; // pointer for convenience
          {
              LOCK(cs_main);
              pblock->nVersion = 1;
              pblock->nTime = ::ChainActive().Tip()->GetMedianTimePast()+1;
              CMutableTransaction txCoinbase(*pblock->vtx[0]);
              txCoinbase.nVersion = 1;
              txCoinbase.vin[0].scriptSig = CScript();
              txCoinbase.vin[0].scriptSig.push_back(blockinfo[i].extranonce);
              txCoinbase.vin[0].scriptSig.push_back(::ChainActive().Height());
              txCoinbase.vout.resize(1); // Ignore the (optional) segwit commitment added by CreateNewBlock (as the hardcoded nonces don't account for this)
              txCoinbase.vout[0].scriptPubKey = CScript();
              pblock->vtx[0] = MakeTransactionRef(std::move(txCoinbase));
              if (txFirst.size() == 0)
                  baseheight = ::ChainActive().Height();
              if (txFirst.size() < 4)
                  txFirst.push_back(pblock->vtx[0]);
              pblock->hashMerkleRoot = BlockMerkleRoot(*pblock);
              pblock->nNonce = blockinfo[i].nonce;
          }
          std::shared_ptr<const CBlock> shared_pblock = std::make_shared<const CBlock>(*pblock);
          BOOST_CHECK(Assert(m_node.chainman)->ProcessNewBlock(chainparams, shared_pblock, true, nullptr));
          pblock->hashPrevBlock = pblock->GetHash();
      }
  
      LOCK(cs_main);
      LOCK(m_node.mempool->cs);
  
      // Just to make sure we can still make simple blocks
      BOOST_CHECK(pblocktemplate = AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey));
  
      const CAmount BLOCKSUBSIDY = 50*COIN;
      const CAmount LOWFEE = CENT;
      const CAmount HIGHFEE = COIN;
      const CAmount HIGHERFEE = 4*COIN;
  
      // block sigops > limit: 1000 CHECKMULTISIG + 1
      tx.vin.resize(1);
      // NOTE: OP_NOP is used to force 20 SigOps for the CHECKMULTISIG
      tx.vin[0].scriptSig = CScript() << OP_0 << OP_0 << OP_0 << OP_NOP << OP_CHECKMULTISIG << OP_1;
      tx.vin[0].prevout.hash = txFirst[0]->GetHash();
      tx.vin[0].prevout.n = 0;
      tx.vout.resize(1);
      tx.vout[0].nValue = BLOCKSUBSIDY;
      for (unsigned int i = 0; i < 1001; ++i)
      {
          tx.vout[0].nValue -= LOWFEE;
          hash = tx.GetHash();
          bool spendsCoinbase = i == 0; // only first tx spends coinbase
          // If we don't set the # of sig ops in the CTxMemPoolEntry, template creation fails
          m_node.mempool->addUnchecked(entry.Fee(LOWFEE).Time(GetTime()).SpendsCoinbase(spendsCoinbase).FromTx(tx));
          tx.vin[0].prevout.hash = hash;
      }
  
      BOOST_CHECK_EXCEPTION(AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey), std::runtime_error, HasReason("bad-blk-sigops"));
      m_node.mempool->clear();
  
      tx.vin[0].prevout.hash = txFirst[0]->GetHash();
      tx.vout[0].nValue = BLOCKSUBSIDY;
      for (unsigned int i = 0; i < 1001; ++i)
      {
          tx.vout[0].nValue -= LOWFEE;
          hash = tx.GetHash();
          bool spendsCoinbase = i == 0; // only first tx spends coinbase
          // If we do set the # of sig ops in the CTxMemPoolEntry, template creation passes
          m_node.mempool->addUnchecked(entry.Fee(LOWFEE).Time(GetTime()).SpendsCoinbase(spendsCoinbase).SigOpsCost(80).FromTx(tx));
          tx.vin[0].prevout.hash = hash;
      }
      BOOST_CHECK(pblocktemplate = AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey));
      m_node.mempool->clear();
  
      // block size > limit
      tx.vin[0].scriptSig = CScript();
      // 18 * (520char + DROP) + OP_1 = 9433 bytes
      std::vector<unsigned char> vchData(520);
      for (unsigned int i = 0; i < 18; ++i)
          tx.vin[0].scriptSig << vchData << OP_DROP;
      tx.vin[0].scriptSig << OP_1;
      tx.vin[0].prevout.hash = txFirst[0]->GetHash();
      tx.vout[0].nValue = BLOCKSUBSIDY;
      for (unsigned int i = 0; i < 128; ++i)
      {
          tx.vout[0].nValue -= LOWFEE;
          hash = tx.GetHash();
          bool spendsCoinbase = i == 0; // only first tx spends coinbase
          m_node.mempool->addUnchecked(entry.Fee(LOWFEE).Time(GetTime()).SpendsCoinbase(spendsCoinbase).FromTx(tx));
          tx.vin[0].prevout.hash = hash;
      }
      BOOST_CHECK(pblocktemplate = AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey));
      m_node.mempool->clear();
  
      // orphan in *m_node.mempool, template creation fails
      hash = tx.GetHash();
      m_node.mempool->addUnchecked(entry.Fee(LOWFEE).Time(GetTime()).FromTx(tx));
      BOOST_CHECK_EXCEPTION(AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey), std::runtime_error, HasReason("bad-txns-inputs-missingorspent"));
      m_node.mempool->clear();
  
      // child with higher feerate than parent
      tx.vin[0].scriptSig = CScript() << OP_1;
      tx.vin[0].prevout.hash = txFirst[1]->GetHash();
      tx.vout[0].nValue = BLOCKSUBSIDY-HIGHFEE;
      hash = tx.GetHash();
      m_node.mempool->addUnchecked(entry.Fee(HIGHFEE).Time(GetTime()).SpendsCoinbase(true).FromTx(tx));
      tx.vin[0].prevout.hash = hash;
      tx.vin.resize(2);
      tx.vin[1].scriptSig = CScript() << OP_1;
      tx.vin[1].prevout.hash = txFirst[0]->GetHash();
      tx.vin[1].prevout.n = 0;
      tx.vout[0].nValue = tx.vout[0].nValue+BLOCKSUBSIDY-HIGHERFEE; //First txn output + fresh coinbase - new txn fee
      hash = tx.GetHash();
      m_node.mempool->addUnchecked(entry.Fee(HIGHERFEE).Time(GetTime()).SpendsCoinbase(true).FromTx(tx));
      BOOST_CHECK(pblocktemplate = AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey));
      m_node.mempool->clear();
  
      // coinbase in *m_node.mempool, template creation fails
      tx.vin.resize(1);
      tx.vin[0].prevout.SetNull();
      tx.vin[0].scriptSig = CScript() << OP_0 << OP_1;
      tx.vout[0].nValue = 0;
      hash = tx.GetHash();
      // give it a fee so it'll get mined
      m_node.mempool->addUnchecked(entry.Fee(LOWFEE).Time(GetTime()).SpendsCoinbase(false).FromTx(tx));
      // Should throw bad-cb-multiple
      BOOST_CHECK_EXCEPTION(AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey), std::runtime_error, HasReason("bad-cb-multiple"));
      m_node.mempool->clear();
  
      // double spend txn pair in *m_node.mempool, template creation fails
      tx.vin[0].prevout.hash = txFirst[0]->GetHash();
      tx.vin[0].scriptSig = CScript() << OP_1;
      tx.vout[0].nValue = BLOCKSUBSIDY-HIGHFEE;
      tx.vout[0].scriptPubKey = CScript() << OP_1;
      hash = tx.GetHash();
      m_node.mempool->addUnchecked(entry.Fee(HIGHFEE).Time(GetTime()).SpendsCoinbase(true).FromTx(tx));
      tx.vout[0].scriptPubKey = CScript() << OP_2;
      hash = tx.GetHash();
      m_node.mempool->addUnchecked(entry.Fee(HIGHFEE).Time(GetTime()).SpendsCoinbase(true).FromTx(tx));
      BOOST_CHECK_EXCEPTION(AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey), std::runtime_error, HasReason("bad-txns-inputs-missingorspent"));
      m_node.mempool->clear();
  
      // subsidy changing
      int nHeight = ::ChainActive().Height();
      // Create an actual 209999-long block chain (without valid blocks).
      while (::ChainActive().Tip()->nHeight < 209999) {
          CBlockIndex* prev = ::ChainActive().Tip();
          CBlockIndex* next = new CBlockIndex();
          next->phashBlock = new uint256(InsecureRand256());
          ::ChainstateActive().CoinsTip().SetBestBlock(next->GetBlockHash());
          next->pprev = prev;
          next->nHeight = prev->nHeight + 1;
          next->BuildSkip();
          ::ChainActive().SetTip(next);
      }
      BOOST_CHECK(pblocktemplate = AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey));
      // Extend to a 210000-long block chain.
      while (::ChainActive().Tip()->nHeight < 210000) {
          CBlockIndex* prev = ::ChainActive().Tip();
          CBlockIndex* next = new CBlockIndex();
          next->phashBlock = new uint256(InsecureRand256());
          ::ChainstateActive().CoinsTip().SetBestBlock(next->GetBlockHash());
          next->pprev = prev;
          next->nHeight = prev->nHeight + 1;
          next->BuildSkip();
          ::ChainActive().SetTip(next);
      }
      BOOST_CHECK(pblocktemplate = AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey));
  
      // invalid p2sh txn in *m_node.mempool, template creation fails
      tx.vin[0].prevout.hash = txFirst[0]->GetHash();
      tx.vin[0].prevout.n = 0;
      tx.vin[0].scriptSig = CScript() << OP_1;
      tx.vout[0].nValue = BLOCKSUBSIDY-LOWFEE;
      script = CScript() << OP_0;
      tx.vout[0].scriptPubKey = GetScriptForDestination(ScriptHash(script));
      hash = tx.GetHash();
      m_node.mempool->addUnchecked(entry.Fee(LOWFEE).Time(GetTime()).SpendsCoinbase(true).FromTx(tx));
      tx.vin[0].prevout.hash = hash;
      tx.vin[0].scriptSig = CScript() << std::vector<unsigned char>(script.begin(), script.end());
      tx.vout[0].nValue -= LOWFEE;
      hash = tx.GetHash();
      m_node.mempool->addUnchecked(entry.Fee(LOWFEE).Time(GetTime()).SpendsCoinbase(false).FromTx(tx));
      // Should throw block-validation-failed
      BOOST_CHECK_EXCEPTION(AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey), std::runtime_error, HasReason("block-validation-failed"));
      m_node.mempool->clear();
  
      // Delete the dummy blocks again.
      while (::ChainActive().Tip()->nHeight > nHeight) {
          CBlockIndex* del = ::ChainActive().Tip();
          ::ChainActive().SetTip(del->pprev);
          ::ChainstateActive().CoinsTip().SetBestBlock(del->pprev->GetBlockHash());
          delete del->phashBlock;
          delete del;
      }
  
      // non-final txs in mempool
      SetMockTime(::ChainActive().Tip()->GetMedianTimePast()+1);
      int flags = LOCKTIME_VERIFY_SEQUENCE|LOCKTIME_MEDIAN_TIME_PAST;
      // height map
      std::vector<int> prevheights;
  
      // relative height locked
      tx.nVersion = 2;
      tx.vin.resize(1);
      prevheights.resize(1);
      tx.vin[0].prevout.hash = txFirst[0]->GetHash(); // only 1 transaction
      tx.vin[0].prevout.n = 0;
      tx.vin[0].scriptSig = CScript() << OP_1;
      tx.vin[0].nSequence = ::ChainActive().Tip()->nHeight + 1; // txFirst[0] is the 2nd block
      prevheights[0] = baseheight + 1;
      tx.vout.resize(1);
      tx.vout[0].nValue = BLOCKSUBSIDY-HIGHFEE;
      tx.vout[0].scriptPubKey = CScript() << OP_1;
      tx.nLockTime = 0;
      hash = tx.GetHash();
      m_node.mempool->addUnchecked(entry.Fee(HIGHFEE).Time(GetTime()).SpendsCoinbase(true).FromTx(tx));
      BOOST_CHECK(CheckFinalTx(CTransaction(tx), flags)); // Locktime passes
      BOOST_CHECK(!TestSequenceLocks(CTransaction(tx), flags)); // Sequence locks fail
      BOOST_CHECK(SequenceLocks(CTransaction(tx), flags, prevheights, CreateBlockIndex(::ChainActive().Tip()->nHeight + 2))); // Sequence locks pass on 2nd block
  
      // relative time locked
      tx.vin[0].prevout.hash = txFirst[1]->GetHash();
      tx.vin[0].nSequence = CTxIn::SEQUENCE_LOCKTIME_TYPE_FLAG | (((::ChainActive().Tip()->GetMedianTimePast()+1-::ChainActive()[1]->GetMedianTimePast()) >> CTxIn::SEQUENCE_LOCKTIME_GRANULARITY) + 1); // txFirst[1] is the 3rd block
      prevheights[0] = baseheight + 2;
      hash = tx.GetHash();
      m_node.mempool->addUnchecked(entry.Time(GetTime()).FromTx(tx));
      BOOST_CHECK(CheckFinalTx(CTransaction(tx), flags)); // Locktime passes
      BOOST_CHECK(!TestSequenceLocks(CTransaction(tx), flags)); // Sequence locks fail
  
      for (int i = 0; i < CBlockIndex::nMedianTimeSpan; i++)
          ::ChainActive().Tip()->GetAncestor(::ChainActive().Tip()->nHeight - i)->nTime += 512; //Trick the MedianTimePast
      BOOST_CHECK(SequenceLocks(CTransaction(tx), flags, prevheights, CreateBlockIndex(::ChainActive().Tip()->nHeight + 1))); // Sequence locks pass 512 seconds later
      for (int i = 0; i < CBlockIndex::nMedianTimeSpan; i++)
          ::ChainActive().Tip()->GetAncestor(::ChainActive().Tip()->nHeight - i)->nTime -= 512; //undo tricked MTP
  
      // absolute height locked
      tx.vin[0].prevout.hash = txFirst[2]->GetHash();
      tx.vin[0].nSequence = CTxIn::SEQUENCE_FINAL - 1;
      prevheights[0] = baseheight + 3;
      tx.nLockTime = ::ChainActive().Tip()->nHeight + 1;
      hash = tx.GetHash();
      m_node.mempool->addUnchecked(entry.Time(GetTime()).FromTx(tx));
      BOOST_CHECK(!CheckFinalTx(CTransaction(tx), flags)); // Locktime fails
      BOOST_CHECK(TestSequenceLocks(CTransaction(tx), flags)); // Sequence locks pass
      BOOST_CHECK(IsFinalTx(CTransaction(tx), ::ChainActive().Tip()->nHeight + 2, ::ChainActive().Tip()->GetMedianTimePast())); // Locktime passes on 2nd block
  
      // absolute time locked
      tx.vin[0].prevout.hash = txFirst[3]->GetHash();
      tx.nLockTime = ::ChainActive().Tip()->GetMedianTimePast();
      prevheights.resize(1);
      prevheights[0] = baseheight + 4;
      hash = tx.GetHash();
      m_node.mempool->addUnchecked(entry.Time(GetTime()).FromTx(tx));
      BOOST_CHECK(!CheckFinalTx(CTransaction(tx), flags)); // Locktime fails
      BOOST_CHECK(TestSequenceLocks(CTransaction(tx), flags)); // Sequence locks pass
      BOOST_CHECK(IsFinalTx(CTransaction(tx), ::ChainActive().Tip()->nHeight + 2, ::ChainActive().Tip()->GetMedianTimePast() + 1)); // Locktime passes 1 second later
  
      // mempool-dependent transactions (not added)
      tx.vin[0].prevout.hash = hash;
      prevheights[0] = ::ChainActive().Tip()->nHeight + 1;
      tx.nLockTime = 0;
      tx.vin[0].nSequence = 0;
      BOOST_CHECK(CheckFinalTx(CTransaction(tx), flags)); // Locktime passes
      BOOST_CHECK(TestSequenceLocks(CTransaction(tx), flags)); // Sequence locks pass
      tx.vin[0].nSequence = 1;
      BOOST_CHECK(!TestSequenceLocks(CTransaction(tx), flags)); // Sequence locks fail
      tx.vin[0].nSequence = CTxIn::SEQUENCE_LOCKTIME_TYPE_FLAG;
      BOOST_CHECK(TestSequenceLocks(CTransaction(tx), flags)); // Sequence locks pass
      tx.vin[0].nSequence = CTxIn::SEQUENCE_LOCKTIME_TYPE_FLAG | 1;
      BOOST_CHECK(!TestSequenceLocks(CTransaction(tx), flags)); // Sequence locks fail
  
      BOOST_CHECK(pblocktemplate = AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey));
  
      // None of the of the absolute height/time locked tx should have made
      // it into the template because we still check IsFinalTx in CreateNewBlock,
      // but relative locked txs will if inconsistently added to mempool.
      // For now these will still generate a valid template until BIP68 soft fork
      BOOST_CHECK_EQUAL(pblocktemplate->block.vtx.size(), 3U);
      // However if we advance height by 1 and time by 512, all of them should be mined
      for (int i = 0; i < CBlockIndex::nMedianTimeSpan; i++)
          ::ChainActive().Tip()->GetAncestor(::ChainActive().Tip()->nHeight - i)->nTime += 512; //Trick the MedianTimePast
      ::ChainActive().Tip()->nHeight++;
      SetMockTime(::ChainActive().Tip()->GetMedianTimePast() + 1);
  
      BOOST_CHECK(pblocktemplate = AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey));
      BOOST_CHECK_EQUAL(pblocktemplate->block.vtx.size(), 5U);
  
      ::ChainActive().Tip()->nHeight--;
      SetMockTime(0);
      m_node.mempool->clear();
  
      TestPackageSelection(chainparams, scriptPubKey, txFirst);
  
      fCheckpointsEnabled = true;
  }
  
  BOOST_AUTO_TEST_SUITE_END()
  