text: // Copyright (c) 2011-2015 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/validation.h"
  #include "validation.h"
  #include "masternode-payments.h"
  #include "miner.h"
  #include "policy/policy.h"
  #include "pubkey.h"
  #include "script/standard.h"
  #include "txmempool.h"
  #include "uint256.h"
  #include "util.h"
  #include "utilstrencodings.h"
  
  #include "test/test_bitlioncoin.h"
  
  #include <memory>
  
  #include <boost/test/unit_test.hpp>
  
  BOOST_FIXTURE_TEST_SUITE(miner_tests, TestingSetup)
  
  static CFeeRate blockMinFeeRate = CFeeRate(DEFAULT_BLOCK_MIN_TX_FEE);
  
  static
  struct {
      unsigned char extranonce;
      unsigned int nonce;
  } blockinfo[] = {
      {0, 0x0017f257}, {0, 0x000d4581}, {0, 0x0048042c}, {0, 0x0025bff0},
      {0, 0x2002d3f8}, {0, 0x6001161f}, {0, 0xe000c5e5}, {0, 0x2000cce2},
      {0, 0x40004753}, {0, 0x80025297}, {0, 0x600009de}, {0, 0x6005780c},
      {0, 0x40025ae9}, {0, 0xc000341c}, {0, 0xc0053062}, {0, 0x40002f90},
      {0, 0xc00047ae}, {0, 0xa0015716}, {0, 0x2000d499}, {0, 0x80009b45},
      {0, 0xc000a7c9}, {0, 0x8001f8ba}, {0, 0xc000d147}, {0, 0x60018ac3},
      {0, 0xc000a9ac}, {0, 0xa003f6e6}, {0, 0x2007436e}, {0, 0xc0013f28},
      {0, 0x00010892}, {0, 0xa0000027}, {0, 0x40008de9}, {0, 0x400019f3},
      {0, 0x00025b86}, {0, 0x80002799}, {0, 0xc001eb0e}, {0, 0xe003e950},
      {0, 0xe001ff87}, {0, 0x000158b0}, {0, 0x600189da}, {0, 0x0000028c},
      {0, 0x600014ca}, {0, 0x60000e4d}, {0, 0xc0000820}, {0, 0xa005184e},
      {0, 0x40012b22}, {0, 0xe0028f6b}, {0, 0xe0027bce}, {0, 0xa0007b51},
      {0, 0x8002496d}, {0, 0xc001f211}, {0, 0x00032bf0}, {0, 0x4002d767},
      {0, 0x6008410a}, {0, 0x800361c3}, {0, 0xe000f80d}, {0, 0xe009ac97},
      {0, 0x80002103}, {0, 0x6001fab4}, {0, 0x4002843b}, {0, 0x6002b67c},
      {0, 0xa000faf3}, {0, 0x6000949e}, {0, 0x80000f1f}, {0, 0x6000c946},
      {0, 0xe00314b3}, {0, 0x20012bbf}, {0, 0x00009c7e}, {0, 0x2003e63a},
      {0, 0x20025157}, {0, 0x80041ff5}, {0, 0x60012a6c}, {0, 0x4000119b},
      {0, 0xc000a454}, {0, 0x20042c4b}, {0, 0x0003003c}, {0, 0x000558b2},
      {0, 0x2000198c}, {0, 0x200b0b3e}, {0, 0x4001c1e4}, {0, 0x80000034},
      {0, 0xe00039d1}, {0, 0xc001ded3}, {0, 0x80006740}, {0, 0xc0014546},
      {0, 0x00036a1a}, {0, 0xa001ae9c}, {0, 0x6000a148}, {0, 0xe001fd73},
      {0, 0xa001cebb}, {0, 0xa000d4b8}, {0, 0xe00154b3}, {0, 0x40004bec},
      {0, 0xc003f230}, {0, 0xe0069a26}, {0, 0xa00072b4}, {0, 0xc002e1b2},
      {0, 0x20009a02}, {0, 0xc0004a10}, {0, 0xe0045a11}, {0, 0x60034d09},
      {0, 0x000073ff}, {0, 0x00003f1c}, {0, 0x4002c4fd}, {0, 0x2000bb60},
      {0, 0x4000b6b6}, {0, 0x6000ea25}, {0, 0x400989d9}, {0, 0xc000877f},
      {0, 0x6000d17c}, {0, 0xc0009228}, {0, 0x4002827f}, {0, 0x80056a85},
      {0, 0x40045af7}, {0, 0x6000df7a}, {0, 0xe00131a1}, {0, 0x40021386},
      {0, 0xa00891b5}, {0, 0x60007854}
  };
  
  CBlockIndex CreateBlockIndex(int nHeight)
  {
      CBlockIndex index;
      index.nHeight = nHeight;
      index.pprev = chainActive.Tip();
      return index;
  }
  
  bool TestSequenceLocks(const CTransaction &tx, int flags)
  {
      LOCK(mempool.cs);
      return CheckSequenceLocks(tx, flags);
  }
  
  // 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.
  // Note that this test assumes blockprioritysize is 0.
  void TestPackageSelection(const CChainParams& chainparams, CScript scriptPubKey, std::vector<CTransactionRef>& txFirst)
  {
      // Disable free transactions, otherwise TX selection is non-deterministic
      SoftSetArg("-blockprioritysize", "0");
  
      // 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
      mempool.addUnchecked(hashParentTx, 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();
      mempool.addUnchecked(hashMediumFeeTx, 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();
      mempool.addUnchecked(hashHighFeeTx, entry.Fee(50000).Time(GetTime()).SpendsCoinbase(false).FromTx(tx));
  
      std::unique_ptr<CBlockTemplate> pblocktemplate = BlockAssembler(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();
      mempool.addUnchecked(hashFreeTx, entry.Fee(0).FromTx(tx));
      size_t freeTxSize = ::GetSerializeSize(tx, SER_NETWORK, 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();
      mempool.addUnchecked(hashLowFeeTx, entry.Fee(feeToUse).FromTx(tx));
      pblocktemplate = BlockAssembler(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
      mempool.removeRecursive(tx);
      tx.vout[0].nValue -= 2; // Now we should be just over the min relay fee
      hashLowFeeTx = tx.GetHash();
      mempool.addUnchecked(hashLowFeeTx, entry.Fee(feeToUse+2).FromTx(tx));
      pblocktemplate = BlockAssembler(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; // 1BTC output
      uint256 hashFreeTx2 = tx.GetHash();
      mempool.addUnchecked(hashFreeTx2, 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();
      mempool.addUnchecked(hashLowFeeTx2, entry.Fee(feeToUse).SpendsCoinbase(false).FromTx(tx));
      pblocktemplate = BlockAssembler(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
      mempool.addUnchecked(tx.GetHash(), entry.Fee(10000).FromTx(tx));
      pblocktemplate = BlockAssembler(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)
  {
      const CChainParams& chainparams = Params(CBaseChainParams::MAIN);
      CScript scriptPubKey = CScript() << ParseHex("04678afdb0fe5548271967f1a67130b7105cd6a828e03909a67962e0ea1f61deb649f6bc3f4cef38c4f35504e51ec112de5c384df7ba0b8d578a4c702b6bf11d5f") << OP_CHECKSIG;
      std::unique_ptr<CBlockTemplate> pblocktemplate;
      CMutableTransaction tx,tx2;
      CScript script;
      uint256 hash;
      TestMemPoolEntryHelper entry;
      entry.nFee = 11;
      entry.dPriority = 111.0;
      entry.nHeight = 11;
  
      LOCK(cs_main);
      fCheckpointsEnabled = false;
  
      // force UpdatedBlockTip to initialize nCachedBlockHeight
      mnpayments.UpdatedBlockTip(chainActive.Tip(), *connman);
  
      // Simple block creation, nothing special yet:
      BOOST_CHECK(pblocktemplate = BlockAssembler(chainparams).CreateNewBlock(scriptPubKey));
  
      // We can't make transactions until we have inputs
      // Therefore, load 100 blocks :)
      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
          pblock->nVersion = 2;
          pblock->nTime = chainActive.Tip()->GetMedianTimePast()+1;
          CMutableTransaction txCoinbase(*pblock->vtx[0]);
          txCoinbase.nVersion = 1;
          txCoinbase.vin[0].scriptSig = CScript() << (chainActive.Height() + 1);
          txCoinbase.vin[0].scriptSig.push_back(blockinfo[i].extranonce);
          txCoinbase.vin[0].scriptSig.push_back(chainActive.Height());
          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(ProcessNewBlock(chainparams, shared_pblock, true, NULL));
          pblock->hashPrevBlock = pblock->GetHash();
      }
  
      // Just to make sure we can still make simple blocks
      BOOST_CHECK(pblocktemplate = BlockAssembler(chainparams).CreateNewBlock(scriptPubKey));
  
      const CAmount BLOCKSUBSIDY = 500*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) ? true : false; // only first tx spends coinbase
          // If we don't set the # of sig ops in the CTxMemPoolEntry, template creation fails
          mempool.addUnchecked(hash, entry.Fee(LOWFEE).Time(GetTime()).SpendsCoinbase(spendsCoinbase).FromTx(tx));
          tx.vin[0].prevout.hash = hash;
      }
      BOOST_CHECK_THROW(BlockAssembler(chainparams).CreateNewBlock(scriptPubKey), std::runtime_error);
      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) ? true : false; // only first tx spends coinbase
          // If we do set the # of sig ops in the CTxMemPoolEntry, template creation passes
          mempool.addUnchecked(hash, entry.Fee(LOWFEE).Time(GetTime()).SpendsCoinbase(spendsCoinbase).SigOps(20).FromTx(tx));
          tx.vin[0].prevout.hash = hash;
      }
      BOOST_CHECK(pblocktemplate = BlockAssembler(chainparams).CreateNewBlock(scriptPubKey));
      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) ? true : false; // only first tx spends coinbase
          mempool.addUnchecked(hash, entry.Fee(LOWFEE).Time(GetTime()).SpendsCoinbase(spendsCoinbase).FromTx(tx));
          tx.vin[0].prevout.hash = hash;
      }
      BOOST_CHECK(pblocktemplate = BlockAssembler(chainparams).CreateNewBlock(scriptPubKey));
      mempool.clear();
  
      // orphan in mempool, template creation fails
      hash = tx.GetHash();
      mempool.addUnchecked(hash, entry.Fee(LOWFEE).Time(GetTime()).FromTx(tx));
      BOOST_CHECK_THROW(BlockAssembler(chainparams).CreateNewBlock(scriptPubKey), std::runtime_error);
      mempool.clear();
  
      // child with higher priority 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();
      mempool.addUnchecked(hash, 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();
      mempool.addUnchecked(hash, entry.Fee(HIGHERFEE).Time(GetTime()).SpendsCoinbase(true).FromTx(tx));
      BOOST_CHECK(pblocktemplate = BlockAssembler(chainparams).CreateNewBlock(scriptPubKey));
      mempool.clear();
  
      // coinbase in 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
      mempool.addUnchecked(hash, entry.Fee(LOWFEE).Time(GetTime()).SpendsCoinbase(false).FromTx(tx));
      BOOST_CHECK_THROW(BlockAssembler(chainparams).CreateNewBlock(scriptPubKey), std::runtime_error);
      mempool.clear();
  
      // invalid (pre-p2sh) txn in 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(CScriptID(script));
      hash = tx.GetHash();
      mempool.addUnchecked(hash, 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();
      mempool.addUnchecked(hash, entry.Fee(LOWFEE).Time(GetTime()).SpendsCoinbase(false).FromTx(tx));
      BOOST_CHECK_THROW(BlockAssembler(chainparams).CreateNewBlock(scriptPubKey), std::runtime_error);
      mempool.clear();
  
      // double spend txn pair in 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();
      mempool.addUnchecked(hash, entry.Fee(HIGHFEE).Time(GetTime()).SpendsCoinbase(true).FromTx(tx));
      tx.vout[0].scriptPubKey = CScript() << OP_2;
      hash = tx.GetHash();
      mempool.addUnchecked(hash, entry.Fee(HIGHFEE).Time(GetTime()).SpendsCoinbase(true).FromTx(tx));
      BOOST_CHECK_THROW(BlockAssembler(chainparams).CreateNewBlock(scriptPubKey), std::runtime_error);
      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(GetRandHash());
      //     pcoinsTip->SetBestBlock(next->GetBlockHash());
      //     next->pprev = prev;
      //     next->nHeight = prev->nHeight + 1;
      //     next->BuildSkip();
      //     chainActive.SetTip(next);
      // }
      //BOOST_CHECK(pblocktemplate = BlockAssembler(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(GetRandHash());
      //     pcoinsTip->SetBestBlock(next->GetBlockHash());
      //     next->pprev = prev;
      //     next->nHeight = prev->nHeight + 1;
      //     next->BuildSkip();
      //     chainActive.SetTip(next);
      // }
      //BOOST_CHECK(pblocktemplate = BlockAssembler(chainparams).CreateNewBlock(scriptPubKey));
      // // Delete the dummy blocks again.
      // while (chainActive.Tip()->nHeight > nHeight) {
      //     CBlockIndex* del = chainActive.Tip();
      //     chainActive.SetTip(del->pprev);
      //     pcoinsTip->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();
      mempool.addUnchecked(hash, entry.Fee(HIGHFEE).Time(GetTime()).SpendsCoinbase(true).FromTx(tx));
      BOOST_CHECK(CheckFinalTx(tx, flags)); // Locktime passes
      BOOST_CHECK(!TestSequenceLocks(tx, flags)); // Sequence locks fail
      BOOST_CHECK(SequenceLocks(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();
      mempool.addUnchecked(hash, entry.Time(GetTime()).FromTx(tx));
      BOOST_CHECK(CheckFinalTx(tx, flags)); // Locktime passes
      BOOST_CHECK(!TestSequenceLocks(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(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();
      mempool.addUnchecked(hash, entry.Time(GetTime()).FromTx(tx));
      BOOST_CHECK(!CheckFinalTx(tx, flags)); // Locktime fails
      BOOST_CHECK(TestSequenceLocks(tx, flags)); // Sequence locks pass
      BOOST_CHECK(IsFinalTx(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();
      mempool.addUnchecked(hash, entry.Time(GetTime()).FromTx(tx));
      BOOST_CHECK(!CheckFinalTx(tx, flags)); // Locktime fails
      BOOST_CHECK(TestSequenceLocks(tx, flags)); // Sequence locks pass
      BOOST_CHECK(IsFinalTx(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(tx, flags)); // Locktime passes
      BOOST_CHECK(TestSequenceLocks(tx, flags)); // Sequence locks pass
      tx.vin[0].nSequence = 1;
      BOOST_CHECK(!TestSequenceLocks(tx, flags)); // Sequence locks fail
      tx.vin[0].nSequence = CTxIn::SEQUENCE_LOCKTIME_TYPE_FLAG;
      BOOST_CHECK(TestSequenceLocks(tx, flags)); // Sequence locks pass
      tx.vin[0].nSequence = CTxIn::SEQUENCE_LOCKTIME_TYPE_FLAG | 1;
      BOOST_CHECK(!TestSequenceLocks(tx, flags)); // Sequence locks fail
  
      BOOST_CHECK(pblocktemplate = BlockAssembler(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(), 3);
      // 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 = BlockAssembler(chainparams).CreateNewBlock(scriptPubKey));
      BOOST_CHECK_EQUAL(pblocktemplate->block.vtx.size(), 5);
  
      chainActive.Tip()->nHeight--;
      SetMockTime(0);
      mempool.clear();
  
      TestPackageSelection(chainparams, scriptPubKey, txFirst);
  
      fCheckpointsEnabled = true;
  }
  
  BOOST_AUTO_TEST_SUITE_END()
  