bitcoin-test 0.1.16-alpha.0

test framework for the bitcoin system
Documentation
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crate::ix!();



//-------------------------------------------[.cpp/bitcoin/src/test/miner_tests.cpp]

#[cfg(test)]
pub mod miner_tests {

    pub struct MinerTestingSetup {
        base: TestingSetup,
    }

    impl MinerTestingSetup {

        #[EXCLUSIVE_LOCKS_REQUIRED(::cs_main, m_node.mempool->cs)]
        pub fn test_package_selection(&mut self, 
            chainparams:    &ChainParams,
            script_pub_key: &Script,
            tx_first:       &Vec<TransactionRef>)  {
            
            todo!();
            /*
            
            */
        }

        #[EXCLUSIVE_LOCKS_REQUIRED(::cs_main, m_node.mempool->cs)]
        pub fn test_sequence_locks(&mut self, 
            tx:    &Transaction,
            flags: i32) -> bool {
            
            todo!();
            /*
                CCoinsViewMemPool view_mempool(&m_node.chainman->ActiveChainstate().CoinsTip(), *m_node.mempool);
                return CheckSequenceLocks(m_node.chainman->ActiveChain().Tip(), view_mempool, tx, flags);
            */
        }
        
        pub fn assembler_for_test(&mut self, params: &ChainParams) -> BlockAssembler {
            
            todo!();
            /*
            
            */
        }
    }
}

#[cfg(test)]
#[MinerTestingSetup]
pub mod miner_tests {

    lazy_static!{
        /*
        static CFeeRate blockMinFeeRate = CFeeRate(DEFAULT_BLOCK_MIN_TX_FEE);
        */
    }

    impl MinerTestingSetup {
        
        pub fn assembler_for_test(&mut self, params: &ChainParams) -> BlockAssembler {
            
            todo!();
            /*
                BlockAssembler::Options options;

                options.nBlockMaxWeight = MAX_BLOCK_WEIGHT;
                options.blockMinFeeRate = blockMinFeeRate;
                return BlockAssembler(m_node.chainman->ActiveChainstate(), *m_node.mempool, params, options);
            */
        }
    }

    pub struct BlockInfo {
        extranonce: u8,
        nonce:      u32,
    }

    lazy_static!{
        /*
        static const BlockInfo  BLOCKINFO[]{
                {8, 582909131},  {0, 971462344},  {2, 1169481553}, {6, 66147495},  {7, 427785981},  {8, 80538907},
                {8, 207348013},  {2, 1951240923}, {4, 215054351},  {1, 491520534}, {8, 1282281282}, {4, 639565734},
                {3, 248274685},  {8, 1160085976}, {6, 396349768},  {5, 393780549}, {5, 1096899528}, {4, 965381630},
                {0, 728758712},  {5, 318638310},  {3, 164591898},  {2, 274234550}, {2, 254411237},  {7, 561761812},
                {2, 268342573},  {0, 402816691},  {1, 221006382},  {6, 538872455}, {7, 393315655},  {4, 814555937},
                {7, 504879194},  {6, 467769648},  {3, 925972193},  {2, 200581872}, {3, 168915404},  {8, 430446262},
                {5, 773507406},  {3, 1195366164}, {0, 433361157},  {3, 297051771}, {0, 558856551},  {2, 501614039},
                {3, 528488272},  {2, 473587734},  {8, 230125274},  {2, 494084400}, {4, 357314010},  {8, 60361686},
                {7, 640624687},  {3, 480441695},  {8, 1424447925}, {4, 752745419}, {1, 288532283},  {6, 669170574},
                {5, 1900907591}, {3, 555326037},  {3, 1121014051}, {0, 545835650}, {8, 189196651},  {5, 252371575},
                {0, 199163095},  {6, 558895874},  {6, 1656839784}, {6, 815175452}, {6, 718677851},  {5, 544000334},
                {0, 340113484},  {6, 850744437},  {4, 496721063},  {8, 524715182}, {6, 574361898},  {6, 1642305743},
                {6, 355110149},  {5, 1647379658}, {8, 1103005356}, {7, 556460625}, {3, 1139533992}, {5, 304736030},
                {2, 361539446},  {2, 143720360},  {6, 201939025},  {7, 423141476}, {4, 574633709},  {3, 1412254823},
                {4, 873254135},  {0, 341817335},  {6, 53501687},   {3, 179755410}, {5, 172209688},  {8, 516810279},
                {4, 1228391489}, {8, 325372589},  {6, 550367589},  {0, 876291812}, {7, 412454120},  {7, 717202854},
                {2, 222677843},  {6, 251778867},  {7, 842004420},  {7, 194762829}, {4, 96668841},   {1, 925485796},
                {0, 792342903},  {6, 678455063},  {6, 773251385},  {5, 186617471}, {6, 883189502},  {7, 396077336},
                {8, 254702874},  {0, 455592851}
            };
        */
    }

    #[EXCLUSIVE_LOCKS_REQUIRED(cs_main)]
    pub fn create_block_index(
            n_height:         i32,
            active_chain_tip: *mut BlockIndex) -> BlockIndex {
        
        todo!();
            /*
                CBlockIndex index;
                index.nHeight = nHeight;
                index.pprev = active_chain_tip;
                return index;
            */
    }

    impl MinerTestingSetup {
        
        /**
          | 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.
          */
        pub fn test_package_selection(&mut self, 
            chainparams:    &ChainParams,
            script_pub_key: &Script,
            tx_first:       &Vec<TransactionRef>)  {
            
            todo!();
            /*
                // 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_REQUIRE_EQUAL(pblocktemplate->block.vtx.size(), 4U);
                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_REQUIRE_EQUAL(pblocktemplate->block.vtx.size(), 6U);
                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();
                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_REQUIRE_EQUAL(pblocktemplate->block.vtx.size(), 9U);
                BOOST_CHECK(pblocktemplate->block.vtx[8]->GetHash() == hashLowFeeTx2);
            */
        }
    }

    /**
      | @note
      | 
      | These tests rely on CreateNewBlock
      | doing its own self-validation!
      |
      */
    #[test] fn create_new_block_validity() {
        todo!();
        /*
        
            // 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 :)
            const_assert(std::size(BLOCKINFO) == 110, "Should have 110 blocks to import");
            int baseheight = 0;
            std::vector<CTransactionRef> txFirst;
            for (const auto& bi : BLOCKINFO) {
                CBlock *pblock = &pblocktemplate->block; // pointer for convenience
                {
                    LOCK(cs_main);
                    pblock->nVersion = VERSIONBITS_TOP_BITS;
                    pblock->nTime = m_node.chainman->ActiveChain().Tip()->GetMedianTimePast()+1;
                    CMutableTransaction txCoinbase(*pblock->vtx[0]);
                    txCoinbase.nVersion = 1;
                    txCoinbase.vin[0].scriptSig = CScript{} << (m_node.chainman->ActiveChain().Height() + 1) << bi.extranonce;
                    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 = m_node.chainman->ActiveChain().Height();
                    if (txFirst.size() < 4)
                        txFirst.push_back(pblock->vtx[0]);
                    pblock->hashMerkleRoot = BlockMerkleRoot(*pblock);
                    pblock->nNonce = bi.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 = m_node.chainman->ActiveChain().Height();
            // Create an actual 209999-long block chain (without valid blocks).
            while (m_node.chainman->ActiveChain().Tip()->nHeight < 209999) {
                CBlockIndex* prev = m_node.chainman->ActiveChain().Tip();
                CBlockIndex* next = new CBlockIndex();
                next->phashBlock = new uint256(InsecureRand256());
                m_node.chainman->ActiveChainstate().CoinsTip().SetBestBlock(next->GetBlockHash());
                next->pprev = prev;
                next->nHeight = prev->nHeight + 1;
                next->BuildSkip();
                m_node.chainman->ActiveChain().SetTip(next);
            }
            BOOST_CHECK(pblocktemplate = AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey));
            // Extend to a 210000-long block chain.
            while (m_node.chainman->ActiveChain().Tip()->nHeight < 210000) {
                CBlockIndex* prev = m_node.chainman->ActiveChain().Tip();
                CBlockIndex* next = new CBlockIndex();
                next->phashBlock = new uint256(InsecureRand256());
                m_node.chainman->ActiveChainstate().CoinsTip().SetBestBlock(next->GetBlockHash());
                next->pprev = prev;
                next->nHeight = prev->nHeight + 1;
                next->BuildSkip();
                m_node.chainman->ActiveChain().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 (m_node.chainman->ActiveChain().Tip()->nHeight > nHeight) {
                CBlockIndex* del = m_node.chainman->ActiveChain().Tip();
                m_node.chainman->ActiveChain().SetTip(del->pprev);
                m_node.chainman->ActiveChainstate().CoinsTip().SetBestBlock(del->pprev->GetBlockHash());
                delete del->phashBlock;
                delete del;
            }

            // non-final txs in mempool
            SetMockTime(m_node.chainman->ActiveChain().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 = m_node.chainman->ActiveChain().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(m_node.chainman->ActiveChain().Tip(), CTransaction(tx), flags)); // Locktime passes
            BOOST_CHECK(!TestSequenceLocks(CTransaction(tx), flags)); // Sequence locks fail

            {
                CBlockIndex* active_chain_tip = m_node.chainman->ActiveChain().Tip();
                BOOST_CHECK(SequenceLocks(CTransaction(tx), flags, prevheights, CreateBlockIndex(active_chain_tip->nHeight + 2, active_chain_tip))); // 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 | (((m_node.chainman->ActiveChain().Tip()->GetMedianTimePast()+1-m_node.chainman->ActiveChain()[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(m_node.chainman->ActiveChain().Tip(), CTransaction(tx), flags)); // Locktime passes
            BOOST_CHECK(!TestSequenceLocks(CTransaction(tx), flags)); // Sequence locks fail

            for (int i = 0; i < CBlockIndex::nMedianTimeSpan; i++)
                m_node.chainman->ActiveChain().Tip()->GetAncestor(m_node.chainman->ActiveChain().Tip()->nHeight - i)->nTime += 512; //Trick the MedianTimePast

            {
                CBlockIndex* active_chain_tip = m_node.chainman->ActiveChain().Tip();
                BOOST_CHECK(SequenceLocks(CTransaction(tx), flags, prevheights, CreateBlockIndex(active_chain_tip->nHeight + 1, active_chain_tip))); // Sequence locks pass 512 seconds later
            }

            for (int i = 0; i < CBlockIndex::nMedianTimeSpan; i++)
                m_node.chainman->ActiveChain().Tip()->GetAncestor(m_node.chainman->ActiveChain().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 = m_node.chainman->ActiveChain().Tip()->nHeight + 1;
            hash = tx.GetHash();
            m_node.mempool->addUnchecked(entry.Time(GetTime()).FromTx(tx));
            BOOST_CHECK(!CheckFinalTx(m_node.chainman->ActiveChain().Tip(), CTransaction(tx), flags)); // Locktime fails
            BOOST_CHECK(TestSequenceLocks(CTransaction(tx), flags)); // Sequence locks pass
            BOOST_CHECK(IsFinalTx(CTransaction(tx), m_node.chainman->ActiveChain().Tip()->nHeight + 2, m_node.chainman->ActiveChain().Tip()->GetMedianTimePast())); // Locktime passes on 2nd block

            // absolute time locked
            tx.vin[0].prevout.hash = txFirst[3]->GetHash();
            tx.nLockTime = m_node.chainman->ActiveChain().Tip()->GetMedianTimePast();
            prevheights.resize(1);
            prevheights[0] = baseheight + 4;
            hash = tx.GetHash();
            m_node.mempool->addUnchecked(entry.Time(GetTime()).FromTx(tx));
            BOOST_CHECK(!CheckFinalTx(m_node.chainman->ActiveChain().Tip(), CTransaction(tx), flags)); // Locktime fails
            BOOST_CHECK(TestSequenceLocks(CTransaction(tx), flags)); // Sequence locks pass
            BOOST_CHECK(IsFinalTx(CTransaction(tx), m_node.chainman->ActiveChain().Tip()->nHeight + 2, m_node.chainman->ActiveChain().Tip()->GetMedianTimePast() + 1)); // Locktime passes 1 second later

            // mempool-dependent transactions (not added)
            tx.vin[0].prevout.hash = hash;
            prevheights[0] = m_node.chainman->ActiveChain().Tip()->nHeight + 1;
            tx.nLockTime = 0;
            tx.vin[0].nSequence = 0;
            BOOST_CHECK(CheckFinalTx(m_node.chainman->ActiveChain().Tip(), 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++)
                m_node.chainman->ActiveChain().Tip()->GetAncestor(m_node.chainman->ActiveChain().Tip()->nHeight - i)->nTime += 512; //Trick the MedianTimePast
            m_node.chainman->ActiveChain().Tip()->nHeight++;
            SetMockTime(m_node.chainman->ActiveChain().Tip()->GetMedianTimePast() + 1);

            BOOST_CHECK(pblocktemplate = AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey));
            BOOST_CHECK_EQUAL(pblocktemplate->block.vtx.size(), 5U);

            m_node.chainman->ActiveChain().Tip()->nHeight--;
            SetMockTime(0);
            m_node.mempool->clear();

            TestPackageSelection(chainparams, scriptPubKey, txFirst);

            fCheckpointsEnabled = true;

        */
    }
}