1 // Copyright (c) 2011-2020 The Bitcoin Core developers
2 // Distributed under the MIT software license, see the accompanying
3 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
4 
5 #include <chainparams.h>
6 #include <coins.h>
7 #include <consensus/consensus.h>
8 #include <consensus/merkle.h>
9 #include <consensus/tx_verify.h>
10 #include <miner.h>
11 #include <policy/policy.h>
12 #include <script/standard.h>
13 #include <txmempool.h>
14 #include <uint256.h>
15 #include <util/strencodings.h>
16 #include <util/system.h>
17 #include <util/time.h>
18 #include <validation.h>
19 
20 #include <test/util/setup_common.h>
21 
22 #include <memory>
23 
24 #include <boost/test/unit_test.hpp>
25 
26 namespace miner_tests {
27 struct MinerTestingSetup : public TestingSetup {
28     void TestPackageSelection(const CChainParams& chainparams, const CScript& scriptPubKey, const std::vector<CTransactionRef>& txFirst) EXCLUSIVE_LOCKS_REQUIRED(::cs_main, m_node.mempool->cs);
TestSequenceLocksminer_tests::MinerTestingSetup29     bool TestSequenceLocks(const CTransaction& tx, int flags) EXCLUSIVE_LOCKS_REQUIRED(::cs_main, m_node.mempool->cs)
30     {
31         CCoinsViewMemPool view_mempool(&m_node.chainman->ActiveChainstate().CoinsTip(), *m_node.mempool);
32         return CheckSequenceLocks(m_node.chainman->ActiveChain().Tip(), view_mempool, tx, flags);
33     }
34     BlockAssembler AssemblerForTest(const CChainParams& params);
35 };
36 } // namespace miner_tests
37 
38 BOOST_FIXTURE_TEST_SUITE(miner_tests, MinerTestingSetup)
39 
40 static CFeeRate blockMinFeeRate = CFeeRate(DEFAULT_BLOCK_MIN_TX_FEE);
41 
AssemblerForTest(const CChainParams & params)42 BlockAssembler MinerTestingSetup::AssemblerForTest(const CChainParams& params)
43 {
44     BlockAssembler::Options options;
45 
46     options.nBlockMaxWeight = MAX_BLOCK_WEIGHT;
47     options.blockMinFeeRate = blockMinFeeRate;
48     return BlockAssembler(m_node.chainman->ActiveChainstate(), *m_node.mempool, params, options);
49 }
50 
51 constexpr static struct {
52     unsigned char extranonce;
53     unsigned int nonce;
54 } blockinfo[] = {
55     {4, 0xa4a3e223}, {2, 0x15c32f9e}, {1, 0x0375b547}, {1, 0x7004a8a5},
56     {2, 0xce440296}, {2, 0x52cfe198}, {1, 0x77a72cd0}, {2, 0xbb5d6f84},
57     {2, 0x83f30c2c}, {1, 0x48a73d5b}, {1, 0xef7dcd01}, {2, 0x6809c6c4},
58     {2, 0x0883ab3c}, {1, 0x087bbbe2}, {2, 0x2104a814}, {2, 0xdffb6daa},
59     {1, 0xee8a0a08}, {2, 0xba4237c1}, {1, 0xa70349dc}, {1, 0x344722bb},
60     {3, 0xd6294733}, {2, 0xec9f5c94}, {2, 0xca2fbc28}, {1, 0x6ba4f406},
61     {2, 0x015d4532}, {1, 0x6e119b7c}, {2, 0x43e8f314}, {2, 0x27962f38},
62     {2, 0xb571b51b}, {2, 0xb36bee23}, {2, 0xd17924a8}, {2, 0x6bc212d9},
63     {1, 0x630d4948}, {2, 0x9a4c4ebb}, {2, 0x554be537}, {1, 0xd63ddfc7},
64     {2, 0xa10acc11}, {1, 0x759a8363}, {2, 0xfb73090d}, {1, 0xe82c6a34},
65     {1, 0xe33e92d7}, {3, 0x658ef5cb}, {2, 0xba32ff22}, {5, 0x0227a10c},
66     {1, 0xa9a70155}, {5, 0xd096d809}, {1, 0x37176174}, {1, 0x830b8d0f},
67     {1, 0xc6e3910e}, {2, 0x823f3ca8}, {1, 0x99850849}, {1, 0x7521fb81},
68     {1, 0xaacaabab}, {1, 0xd645a2eb}, {5, 0x7aea1781}, {5, 0x9d6e4b78},
69     {1, 0x4ce90fd8}, {1, 0xabdc832d}, {6, 0x4a34f32a}, {2, 0xf2524c1c},
70     {2, 0x1bbeb08a}, {1, 0xad47f480}, {1, 0x9f026aeb}, {1, 0x15a95049},
71     {2, 0xd1cb95b2}, {2, 0xf84bbda5}, {1, 0x0fa62cd1}, {1, 0xe05f9169},
72     {1, 0x78d194a9}, {5, 0x3e38147b}, {5, 0x737ba0d4}, {1, 0x63378e10},
73     {1, 0x6d5f91cf}, {2, 0x88612eb8}, {2, 0xe9639484}, {1, 0xb7fabc9d},
74     {2, 0x19b01592}, {1, 0x5a90dd31}, {2, 0x5bd7e028}, {2, 0x94d00323},
75     {1, 0xa9b9c01a}, {1, 0x3a40de61}, {1, 0x56e7eec7}, {5, 0x859f7ef6},
76     {1, 0xfd8e5630}, {1, 0x2b0c9f7f}, {1, 0xba700e26}, {1, 0x7170a408},
77     {1, 0x70de86a8}, {1, 0x74d64cd5}, {1, 0x49e738a1}, {2, 0x6910b602},
78     {0, 0x643c565f}, {1, 0x54264b3f}, {2, 0x97ea6396}, {2, 0x55174459},
79     {2, 0x03e8779a}, {1, 0x98f34d8f}, {1, 0xc07b2b07}, {1, 0xdfe29668},
80     {1, 0x3141c7c1}, {1, 0xb3b595f4}, {1, 0x735abf08}, {5, 0x623bfbce},
81     {2, 0xd351e722}, {1, 0xf4ca48c9}, {1, 0x5b19c670}, {1, 0xa164bf0e},
82     {2, 0xbbbeb305}, {2, 0xfe1c810a},
83 };
84 
CreateBlockIndex(int nHeight,CBlockIndex * active_chain_tip)85 static CBlockIndex CreateBlockIndex(int nHeight, CBlockIndex* active_chain_tip) EXCLUSIVE_LOCKS_REQUIRED(cs_main)
86 {
87     CBlockIndex index;
88     index.nHeight = nHeight;
89     index.pprev = active_chain_tip;
90     return index;
91 }
92 
93 // Test suite for ancestor feerate transaction selection.
94 // Implemented as an additional function, rather than a separate test case,
95 // to allow reusing the blockchain created in CreateNewBlock_validity.
TestPackageSelection(const CChainParams & chainparams,const CScript & scriptPubKey,const std::vector<CTransactionRef> & txFirst)96 void MinerTestingSetup::TestPackageSelection(const CChainParams& chainparams, const CScript& scriptPubKey, const std::vector<CTransactionRef>& txFirst)
97 {
98     // Test the ancestor feerate transaction selection.
99     TestMemPoolEntryHelper entry;
100 
101     // Test that a medium fee transaction will be selected after a higher fee
102     // rate package with a low fee rate parent.
103     CMutableTransaction tx;
104     tx.vin.resize(1);
105     tx.vin[0].scriptSig = CScript() << OP_1;
106     tx.vin[0].prevout.hash = txFirst[0]->GetHash();
107     tx.vin[0].prevout.n = 0;
108     tx.vout.resize(1);
109     tx.vout[0].nValue = 5000000000LL - 1000;
110     // This tx has a low fee: 1000 satoshis
111     uint256 hashParentTx = tx.GetHash(); // save this txid for later use
112     m_node.mempool->addUnchecked(entry.Fee(1000).Time(GetTime()).SpendsCoinbase(true).FromTx(tx));
113 
114     // This tx has a medium fee: 10000 satoshis
115     tx.vin[0].prevout.hash = txFirst[1]->GetHash();
116     tx.vout[0].nValue = 5000000000LL - 10000;
117     uint256 hashMediumFeeTx = tx.GetHash();
118     m_node.mempool->addUnchecked(entry.Fee(10000).Time(GetTime()).SpendsCoinbase(true).FromTx(tx));
119 
120     // This tx has a high fee, but depends on the first transaction
121     tx.vin[0].prevout.hash = hashParentTx;
122     tx.vout[0].nValue = 5000000000LL - 1000 - 50000; // 50k satoshi fee
123     uint256 hashHighFeeTx = tx.GetHash();
124     m_node.mempool->addUnchecked(entry.Fee(50000).Time(GetTime()).SpendsCoinbase(false).FromTx(tx));
125 
126     std::unique_ptr<CBlockTemplate> pblocktemplate = AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey);
127     BOOST_REQUIRE_EQUAL(pblocktemplate->block.vtx.size(), 4U);
128     BOOST_CHECK(pblocktemplate->block.vtx[1]->GetHash() == hashParentTx);
129     BOOST_CHECK(pblocktemplate->block.vtx[2]->GetHash() == hashHighFeeTx);
130     BOOST_CHECK(pblocktemplate->block.vtx[3]->GetHash() == hashMediumFeeTx);
131 
132     // Test that a package below the block min tx fee doesn't get included
133     tx.vin[0].prevout.hash = hashHighFeeTx;
134     tx.vout[0].nValue = 5000000000LL - 1000 - 50000; // 0 fee
135     uint256 hashFreeTx = tx.GetHash();
136     m_node.mempool->addUnchecked(entry.Fee(0).FromTx(tx));
137     size_t freeTxSize = ::GetSerializeSize(tx, PROTOCOL_VERSION);
138 
139     // Calculate a fee on child transaction that will put the package just
140     // below the block min tx fee (assuming 1 child tx of the same size).
141     CAmount feeToUse = blockMinFeeRate.GetFee(2*freeTxSize) - 1;
142 
143     tx.vin[0].prevout.hash = hashFreeTx;
144     tx.vout[0].nValue = 5000000000LL - 1000 - 50000 - feeToUse;
145     uint256 hashLowFeeTx = tx.GetHash();
146     m_node.mempool->addUnchecked(entry.Fee(feeToUse).FromTx(tx));
147     pblocktemplate = AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey);
148     // Verify that the free tx and the low fee tx didn't get selected
149     for (size_t i=0; i<pblocktemplate->block.vtx.size(); ++i) {
150         BOOST_CHECK(pblocktemplate->block.vtx[i]->GetHash() != hashFreeTx);
151         BOOST_CHECK(pblocktemplate->block.vtx[i]->GetHash() != hashLowFeeTx);
152     }
153 
154     // Test that packages above the min relay fee do get included, even if one
155     // of the transactions is below the min relay fee
156     // Remove the low fee transaction and replace with a higher fee transaction
157     m_node.mempool->removeRecursive(CTransaction(tx), MemPoolRemovalReason::REPLACED);
158     tx.vout[0].nValue -= 2; // Now we should be just over the min relay fee
159     hashLowFeeTx = tx.GetHash();
160     m_node.mempool->addUnchecked(entry.Fee(feeToUse+2).FromTx(tx));
161     pblocktemplate = AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey);
162     BOOST_REQUIRE_EQUAL(pblocktemplate->block.vtx.size(), 6U);
163     BOOST_CHECK(pblocktemplate->block.vtx[4]->GetHash() == hashFreeTx);
164     BOOST_CHECK(pblocktemplate->block.vtx[5]->GetHash() == hashLowFeeTx);
165 
166     // Test that transaction selection properly updates ancestor fee
167     // calculations as ancestor transactions get included in a block.
168     // Add a 0-fee transaction that has 2 outputs.
169     tx.vin[0].prevout.hash = txFirst[2]->GetHash();
170     tx.vout.resize(2);
171     tx.vout[0].nValue = 5000000000LL - 100000000;
172     tx.vout[1].nValue = 100000000; // 1BTC output
173     uint256 hashFreeTx2 = tx.GetHash();
174     m_node.mempool->addUnchecked(entry.Fee(0).SpendsCoinbase(true).FromTx(tx));
175 
176     // This tx can't be mined by itself
177     tx.vin[0].prevout.hash = hashFreeTx2;
178     tx.vout.resize(1);
179     feeToUse = blockMinFeeRate.GetFee(freeTxSize);
180     tx.vout[0].nValue = 5000000000LL - 100000000 - feeToUse;
181     uint256 hashLowFeeTx2 = tx.GetHash();
182     m_node.mempool->addUnchecked(entry.Fee(feeToUse).SpendsCoinbase(false).FromTx(tx));
183     pblocktemplate = AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey);
184 
185     // Verify that this tx isn't selected.
186     for (size_t i=0; i<pblocktemplate->block.vtx.size(); ++i) {
187         BOOST_CHECK(pblocktemplate->block.vtx[i]->GetHash() != hashFreeTx2);
188         BOOST_CHECK(pblocktemplate->block.vtx[i]->GetHash() != hashLowFeeTx2);
189     }
190 
191     // This tx will be mineable, and should cause hashLowFeeTx2 to be selected
192     // as well.
193     tx.vin[0].prevout.n = 1;
194     tx.vout[0].nValue = 100000000 - 10000; // 10k satoshi fee
195     m_node.mempool->addUnchecked(entry.Fee(10000).FromTx(tx));
196     pblocktemplate = AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey);
197     BOOST_REQUIRE_EQUAL(pblocktemplate->block.vtx.size(), 9U);
198     BOOST_CHECK(pblocktemplate->block.vtx[8]->GetHash() == hashLowFeeTx2);
199 }
200 
201 // NOTE: These tests rely on CreateNewBlock doing its own self-validation!
BOOST_AUTO_TEST_CASE(CreateNewBlock_validity)202 BOOST_AUTO_TEST_CASE(CreateNewBlock_validity)
203 {
204     // Note that by default, these tests run with size accounting enabled.
205     const auto chainParams = CreateChainParams(*m_node.args, CBaseChainParams::MAIN);
206     const CChainParams& chainparams = *chainParams;
207     CScript scriptPubKey = CScript() << ParseHex("04678afdb0fe5548271967f1a67130b7105cd6a828e03909a67962e0ea1f61deb649f6bc3f4cef38c4f35504e51ec112de5c384df7ba0b8d578a4c702b6bf11d5f") << OP_CHECKSIG;
208     std::unique_ptr<CBlockTemplate> pblocktemplate;
209     CMutableTransaction tx;
210     CScript script;
211     uint256 hash;
212     TestMemPoolEntryHelper entry;
213     entry.nFee = 11;
214     entry.nHeight = 11;
215 
216     fCheckpointsEnabled = false;
217 
218     // Simple block creation, nothing special yet:
219     BOOST_CHECK(pblocktemplate = AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey));
220 
221     // We can't make transactions until we have inputs
222     // Therefore, load 110 blocks :)
223     static_assert(std::size(blockinfo) == 110, "Should have 110 blocks to import");
224     int baseheight = 0;
225     std::vector<CTransactionRef> txFirst;
226     for (const auto& bi : blockinfo) {
227         CBlock *pblock = &pblocktemplate->block; // pointer for convenience
228         {
229             LOCK(cs_main);
230             pblock->nVersion = 1;
231             pblock->nTime = m_node.chainman->ActiveChain().Tip()->GetMedianTimePast()+1;
232             CMutableTransaction txCoinbase(*pblock->vtx[0]);
233             txCoinbase.nVersion = 1;
234             txCoinbase.vin[0].scriptSig = CScript();
235             txCoinbase.vin[0].scriptSig.push_back(bi.extranonce);
236             txCoinbase.vin[0].scriptSig.push_back(m_node.chainman->ActiveChain().Height());
237             txCoinbase.vout.resize(1); // Ignore the (optional) segwit commitment added by CreateNewBlock (as the hardcoded nonces don't account for this)
238             txCoinbase.vout[0].scriptPubKey = CScript();
239             pblock->vtx[0] = MakeTransactionRef(std::move(txCoinbase));
240             if (txFirst.size() == 0)
241                 baseheight = m_node.chainman->ActiveChain().Height();
242             if (txFirst.size() < 4)
243                 txFirst.push_back(pblock->vtx[0]);
244             pblock->hashMerkleRoot = BlockMerkleRoot(*pblock);
245             pblock->nNonce = bi.nonce;
246         }
247         std::shared_ptr<const CBlock> shared_pblock = std::make_shared<const CBlock>(*pblock);
248         BOOST_CHECK(Assert(m_node.chainman)->ProcessNewBlock(chainparams, shared_pblock, true, nullptr));
249         pblock->hashPrevBlock = pblock->GetHash();
250     }
251 
252     LOCK(cs_main);
253     LOCK(m_node.mempool->cs);
254 
255     // Just to make sure we can still make simple blocks
256     BOOST_CHECK(pblocktemplate = AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey));
257 
258     const CAmount BLOCKSUBSIDY = 50*COIN;
259     const CAmount LOWFEE = CENT;
260     const CAmount HIGHFEE = COIN;
261     const CAmount HIGHERFEE = 4*COIN;
262 
263     // block sigops > limit: 1000 CHECKMULTISIG + 1
264     tx.vin.resize(1);
265     // NOTE: OP_NOP is used to force 20 SigOps for the CHECKMULTISIG
266     tx.vin[0].scriptSig = CScript() << OP_0 << OP_0 << OP_0 << OP_NOP << OP_CHECKMULTISIG << OP_1;
267     tx.vin[0].prevout.hash = txFirst[0]->GetHash();
268     tx.vin[0].prevout.n = 0;
269     tx.vout.resize(1);
270     tx.vout[0].nValue = BLOCKSUBSIDY;
271     for (unsigned int i = 0; i < 1001; ++i)
272     {
273         tx.vout[0].nValue -= LOWFEE;
274         hash = tx.GetHash();
275         bool spendsCoinbase = i == 0; // only first tx spends coinbase
276         // If we don't set the # of sig ops in the CTxMemPoolEntry, template creation fails
277         m_node.mempool->addUnchecked(entry.Fee(LOWFEE).Time(GetTime()).SpendsCoinbase(spendsCoinbase).FromTx(tx));
278         tx.vin[0].prevout.hash = hash;
279     }
280 
281     BOOST_CHECK_EXCEPTION(AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey), std::runtime_error, HasReason("bad-blk-sigops"));
282     m_node.mempool->clear();
283 
284     tx.vin[0].prevout.hash = txFirst[0]->GetHash();
285     tx.vout[0].nValue = BLOCKSUBSIDY;
286     for (unsigned int i = 0; i < 1001; ++i)
287     {
288         tx.vout[0].nValue -= LOWFEE;
289         hash = tx.GetHash();
290         bool spendsCoinbase = i == 0; // only first tx spends coinbase
291         // If we do set the # of sig ops in the CTxMemPoolEntry, template creation passes
292         m_node.mempool->addUnchecked(entry.Fee(LOWFEE).Time(GetTime()).SpendsCoinbase(spendsCoinbase).SigOpsCost(80).FromTx(tx));
293         tx.vin[0].prevout.hash = hash;
294     }
295     BOOST_CHECK(pblocktemplate = AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey));
296     m_node.mempool->clear();
297 
298     // block size > limit
299     tx.vin[0].scriptSig = CScript();
300     // 18 * (520char + DROP) + OP_1 = 9433 bytes
301     std::vector<unsigned char> vchData(520);
302     for (unsigned int i = 0; i < 18; ++i)
303         tx.vin[0].scriptSig << vchData << OP_DROP;
304     tx.vin[0].scriptSig << OP_1;
305     tx.vin[0].prevout.hash = txFirst[0]->GetHash();
306     tx.vout[0].nValue = BLOCKSUBSIDY;
307     for (unsigned int i = 0; i < 128; ++i)
308     {
309         tx.vout[0].nValue -= LOWFEE;
310         hash = tx.GetHash();
311         bool spendsCoinbase = i == 0; // only first tx spends coinbase
312         m_node.mempool->addUnchecked(entry.Fee(LOWFEE).Time(GetTime()).SpendsCoinbase(spendsCoinbase).FromTx(tx));
313         tx.vin[0].prevout.hash = hash;
314     }
315     BOOST_CHECK(pblocktemplate = AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey));
316     m_node.mempool->clear();
317 
318     // orphan in *m_node.mempool, template creation fails
319     hash = tx.GetHash();
320     m_node.mempool->addUnchecked(entry.Fee(LOWFEE).Time(GetTime()).FromTx(tx));
321     BOOST_CHECK_EXCEPTION(AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey), std::runtime_error, HasReason("bad-txns-inputs-missingorspent"));
322     m_node.mempool->clear();
323 
324     // child with higher feerate than parent
325     tx.vin[0].scriptSig = CScript() << OP_1;
326     tx.vin[0].prevout.hash = txFirst[1]->GetHash();
327     tx.vout[0].nValue = BLOCKSUBSIDY-HIGHFEE;
328     hash = tx.GetHash();
329     m_node.mempool->addUnchecked(entry.Fee(HIGHFEE).Time(GetTime()).SpendsCoinbase(true).FromTx(tx));
330     tx.vin[0].prevout.hash = hash;
331     tx.vin.resize(2);
332     tx.vin[1].scriptSig = CScript() << OP_1;
333     tx.vin[1].prevout.hash = txFirst[0]->GetHash();
334     tx.vin[1].prevout.n = 0;
335     tx.vout[0].nValue = tx.vout[0].nValue+BLOCKSUBSIDY-HIGHERFEE; //First txn output + fresh coinbase - new txn fee
336     hash = tx.GetHash();
337     m_node.mempool->addUnchecked(entry.Fee(HIGHERFEE).Time(GetTime()).SpendsCoinbase(true).FromTx(tx));
338     BOOST_CHECK(pblocktemplate = AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey));
339     m_node.mempool->clear();
340 
341     // coinbase in *m_node.mempool, template creation fails
342     tx.vin.resize(1);
343     tx.vin[0].prevout.SetNull();
344     tx.vin[0].scriptSig = CScript() << OP_0 << OP_1;
345     tx.vout[0].nValue = 0;
346     hash = tx.GetHash();
347     // give it a fee so it'll get mined
348     m_node.mempool->addUnchecked(entry.Fee(LOWFEE).Time(GetTime()).SpendsCoinbase(false).FromTx(tx));
349     // Should throw bad-cb-multiple
350     BOOST_CHECK_EXCEPTION(AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey), std::runtime_error, HasReason("bad-cb-multiple"));
351     m_node.mempool->clear();
352 
353     // double spend txn pair in *m_node.mempool, template creation fails
354     tx.vin[0].prevout.hash = txFirst[0]->GetHash();
355     tx.vin[0].scriptSig = CScript() << OP_1;
356     tx.vout[0].nValue = BLOCKSUBSIDY-HIGHFEE;
357     tx.vout[0].scriptPubKey = CScript() << OP_1;
358     hash = tx.GetHash();
359     m_node.mempool->addUnchecked(entry.Fee(HIGHFEE).Time(GetTime()).SpendsCoinbase(true).FromTx(tx));
360     tx.vout[0].scriptPubKey = CScript() << OP_2;
361     hash = tx.GetHash();
362     m_node.mempool->addUnchecked(entry.Fee(HIGHFEE).Time(GetTime()).SpendsCoinbase(true).FromTx(tx));
363     BOOST_CHECK_EXCEPTION(AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey), std::runtime_error, HasReason("bad-txns-inputs-missingorspent"));
364     m_node.mempool->clear();
365 
366     // subsidy changing
367     int nHeight = m_node.chainman->ActiveChain().Height();
368     // Create an actual 209999-long block chain (without valid blocks).
369     while (m_node.chainman->ActiveChain().Tip()->nHeight < 209999) {
370         CBlockIndex* prev = m_node.chainman->ActiveChain().Tip();
371         CBlockIndex* next = new CBlockIndex();
372         next->phashBlock = new uint256(InsecureRand256());
373         m_node.chainman->ActiveChainstate().CoinsTip().SetBestBlock(next->GetBlockHash());
374         next->pprev = prev;
375         next->nHeight = prev->nHeight + 1;
376         next->BuildSkip();
377         m_node.chainman->ActiveChain().SetTip(next);
378     }
379     BOOST_CHECK(pblocktemplate = AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey));
380     // Extend to a 210000-long block chain.
381     while (m_node.chainman->ActiveChain().Tip()->nHeight < 210000) {
382         CBlockIndex* prev = m_node.chainman->ActiveChain().Tip();
383         CBlockIndex* next = new CBlockIndex();
384         next->phashBlock = new uint256(InsecureRand256());
385         m_node.chainman->ActiveChainstate().CoinsTip().SetBestBlock(next->GetBlockHash());
386         next->pprev = prev;
387         next->nHeight = prev->nHeight + 1;
388         next->BuildSkip();
389         m_node.chainman->ActiveChain().SetTip(next);
390     }
391     BOOST_CHECK(pblocktemplate = AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey));
392 
393     // invalid p2sh txn in *m_node.mempool, template creation fails
394     tx.vin[0].prevout.hash = txFirst[0]->GetHash();
395     tx.vin[0].prevout.n = 0;
396     tx.vin[0].scriptSig = CScript() << OP_1;
397     tx.vout[0].nValue = BLOCKSUBSIDY-LOWFEE;
398     script = CScript() << OP_0;
399     tx.vout[0].scriptPubKey = GetScriptForDestination(ScriptHash(script));
400     hash = tx.GetHash();
401     m_node.mempool->addUnchecked(entry.Fee(LOWFEE).Time(GetTime()).SpendsCoinbase(true).FromTx(tx));
402     tx.vin[0].prevout.hash = hash;
403     tx.vin[0].scriptSig = CScript() << std::vector<unsigned char>(script.begin(), script.end());
404     tx.vout[0].nValue -= LOWFEE;
405     hash = tx.GetHash();
406     m_node.mempool->addUnchecked(entry.Fee(LOWFEE).Time(GetTime()).SpendsCoinbase(false).FromTx(tx));
407     // Should throw block-validation-failed
408     BOOST_CHECK_EXCEPTION(AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey), std::runtime_error, HasReason("block-validation-failed"));
409     m_node.mempool->clear();
410 
411     // Delete the dummy blocks again.
412     while (m_node.chainman->ActiveChain().Tip()->nHeight > nHeight) {
413         CBlockIndex* del = m_node.chainman->ActiveChain().Tip();
414         m_node.chainman->ActiveChain().SetTip(del->pprev);
415         m_node.chainman->ActiveChainstate().CoinsTip().SetBestBlock(del->pprev->GetBlockHash());
416         delete del->phashBlock;
417         delete del;
418     }
419 
420     // non-final txs in mempool
421     SetMockTime(m_node.chainman->ActiveChain().Tip()->GetMedianTimePast()+1);
422     int flags = LOCKTIME_VERIFY_SEQUENCE|LOCKTIME_MEDIAN_TIME_PAST;
423     // height map
424     std::vector<int> prevheights;
425 
426     // relative height locked
427     tx.nVersion = 2;
428     tx.vin.resize(1);
429     prevheights.resize(1);
430     tx.vin[0].prevout.hash = txFirst[0]->GetHash(); // only 1 transaction
431     tx.vin[0].prevout.n = 0;
432     tx.vin[0].scriptSig = CScript() << OP_1;
433     tx.vin[0].nSequence = m_node.chainman->ActiveChain().Tip()->nHeight + 1; // txFirst[0] is the 2nd block
434     prevheights[0] = baseheight + 1;
435     tx.vout.resize(1);
436     tx.vout[0].nValue = BLOCKSUBSIDY-HIGHFEE;
437     tx.vout[0].scriptPubKey = CScript() << OP_1;
438     tx.nLockTime = 0;
439     hash = tx.GetHash();
440     m_node.mempool->addUnchecked(entry.Fee(HIGHFEE).Time(GetTime()).SpendsCoinbase(true).FromTx(tx));
441     BOOST_CHECK(CheckFinalTx(m_node.chainman->ActiveChain().Tip(), CTransaction(tx), flags)); // Locktime passes
442     BOOST_CHECK(!TestSequenceLocks(CTransaction(tx), flags)); // Sequence locks fail
443 
444     {
445         CBlockIndex* active_chain_tip = m_node.chainman->ActiveChain().Tip();
446         BOOST_CHECK(SequenceLocks(CTransaction(tx), flags, prevheights, CreateBlockIndex(active_chain_tip->nHeight + 2, active_chain_tip))); // Sequence locks pass on 2nd block
447     }
448 
449     // relative time locked
450     tx.vin[0].prevout.hash = txFirst[1]->GetHash();
451     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
452     prevheights[0] = baseheight + 2;
453     hash = tx.GetHash();
454     m_node.mempool->addUnchecked(entry.Time(GetTime()).FromTx(tx));
455     BOOST_CHECK(CheckFinalTx(m_node.chainman->ActiveChain().Tip(), CTransaction(tx), flags)); // Locktime passes
456     BOOST_CHECK(!TestSequenceLocks(CTransaction(tx), flags)); // Sequence locks fail
457 
458     for (int i = 0; i < CBlockIndex::nMedianTimeSpan; i++)
459         m_node.chainman->ActiveChain().Tip()->GetAncestor(m_node.chainman->ActiveChain().Tip()->nHeight - i)->nTime += 512; //Trick the MedianTimePast
460 
461     {
462         CBlockIndex* active_chain_tip = m_node.chainman->ActiveChain().Tip();
463         BOOST_CHECK(SequenceLocks(CTransaction(tx), flags, prevheights, CreateBlockIndex(active_chain_tip->nHeight + 1, active_chain_tip))); // Sequence locks pass 512 seconds later
464     }
465 
466     for (int i = 0; i < CBlockIndex::nMedianTimeSpan; i++)
467         m_node.chainman->ActiveChain().Tip()->GetAncestor(m_node.chainman->ActiveChain().Tip()->nHeight - i)->nTime -= 512; //undo tricked MTP
468 
469     // absolute height locked
470     tx.vin[0].prevout.hash = txFirst[2]->GetHash();
471     tx.vin[0].nSequence = CTxIn::SEQUENCE_FINAL - 1;
472     prevheights[0] = baseheight + 3;
473     tx.nLockTime = m_node.chainman->ActiveChain().Tip()->nHeight + 1;
474     hash = tx.GetHash();
475     m_node.mempool->addUnchecked(entry.Time(GetTime()).FromTx(tx));
476     BOOST_CHECK(!CheckFinalTx(m_node.chainman->ActiveChain().Tip(), CTransaction(tx), flags)); // Locktime fails
477     BOOST_CHECK(TestSequenceLocks(CTransaction(tx), flags)); // Sequence locks pass
478     BOOST_CHECK(IsFinalTx(CTransaction(tx), m_node.chainman->ActiveChain().Tip()->nHeight + 2, m_node.chainman->ActiveChain().Tip()->GetMedianTimePast())); // Locktime passes on 2nd block
479 
480     // absolute time locked
481     tx.vin[0].prevout.hash = txFirst[3]->GetHash();
482     tx.nLockTime = m_node.chainman->ActiveChain().Tip()->GetMedianTimePast();
483     prevheights.resize(1);
484     prevheights[0] = baseheight + 4;
485     hash = tx.GetHash();
486     m_node.mempool->addUnchecked(entry.Time(GetTime()).FromTx(tx));
487     BOOST_CHECK(!CheckFinalTx(m_node.chainman->ActiveChain().Tip(), CTransaction(tx), flags)); // Locktime fails
488     BOOST_CHECK(TestSequenceLocks(CTransaction(tx), flags)); // Sequence locks pass
489     BOOST_CHECK(IsFinalTx(CTransaction(tx), m_node.chainman->ActiveChain().Tip()->nHeight + 2, m_node.chainman->ActiveChain().Tip()->GetMedianTimePast() + 1)); // Locktime passes 1 second later
490 
491     // mempool-dependent transactions (not added)
492     tx.vin[0].prevout.hash = hash;
493     prevheights[0] = m_node.chainman->ActiveChain().Tip()->nHeight + 1;
494     tx.nLockTime = 0;
495     tx.vin[0].nSequence = 0;
496     BOOST_CHECK(CheckFinalTx(m_node.chainman->ActiveChain().Tip(), CTransaction(tx), flags)); // Locktime passes
497     BOOST_CHECK(TestSequenceLocks(CTransaction(tx), flags)); // Sequence locks pass
498     tx.vin[0].nSequence = 1;
499     BOOST_CHECK(!TestSequenceLocks(CTransaction(tx), flags)); // Sequence locks fail
500     tx.vin[0].nSequence = CTxIn::SEQUENCE_LOCKTIME_TYPE_FLAG;
501     BOOST_CHECK(TestSequenceLocks(CTransaction(tx), flags)); // Sequence locks pass
502     tx.vin[0].nSequence = CTxIn::SEQUENCE_LOCKTIME_TYPE_FLAG | 1;
503     BOOST_CHECK(!TestSequenceLocks(CTransaction(tx), flags)); // Sequence locks fail
504 
505     BOOST_CHECK(pblocktemplate = AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey));
506 
507     // None of the of the absolute height/time locked tx should have made
508     // it into the template because we still check IsFinalTx in CreateNewBlock,
509     // but relative locked txs will if inconsistently added to mempool.
510     // For now these will still generate a valid template until BIP68 soft fork
511     BOOST_CHECK_EQUAL(pblocktemplate->block.vtx.size(), 3U);
512     // However if we advance height by 1 and time by 512, all of them should be mined
513     for (int i = 0; i < CBlockIndex::nMedianTimeSpan; i++)
514         m_node.chainman->ActiveChain().Tip()->GetAncestor(m_node.chainman->ActiveChain().Tip()->nHeight - i)->nTime += 512; //Trick the MedianTimePast
515     m_node.chainman->ActiveChain().Tip()->nHeight++;
516     SetMockTime(m_node.chainman->ActiveChain().Tip()->GetMedianTimePast() + 1);
517 
518     BOOST_CHECK(pblocktemplate = AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey));
519     BOOST_CHECK_EQUAL(pblocktemplate->block.vtx.size(), 5U);
520 
521     m_node.chainman->ActiveChain().Tip()->nHeight--;
522     SetMockTime(0);
523     m_node.mempool->clear();
524 
525     TestPackageSelection(chainparams, scriptPubKey, txFirst);
526 
527     fCheckpointsEnabled = true;
528 }
529 
530 BOOST_AUTO_TEST_SUITE_END()
531