src/test/miner_tests.cpp

   1 // Copyright (c) 2011-2017 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 <consensus/validation.h>
  11 #include <validation.h>
  12 #include <miner.h>
  13 #include <policy/policy.h>
  14 #include <pubkey.h>
  15 #include <script/standard.h>
  16 #include <txmempool.h>
  17 #include <uint256.h>
  18 #include <util.h>
  19 #include <utilstrencodings.h>
  20
  21 #include <test/test_bitcoin.h>
  22
  23 #include <memory>
  24
  25 #include <boost/test/unit_test.hpp>
  26
  27 BOOST_FIXTURE_TEST_SUITE(miner_tests, TestingSetup)
  28
  29 // BOOST_CHECK_EXCEPTION predicates to check the specific validation error
  30 class HasReason {
  31 public:
  32     HasReason(const std::string& reason) : m_reason(reason) {}
  33     bool operator() (const std::runtime_error& e) const {
  34         return std::string(e.what()).find(m_reason) != std::string::npos;
  35     };
  36 private:
  37     const std::string m_reason;
  38 };
  39
  40 static CFeeRate blockMinFeeRate = CFeeRate(DEFAULT_BLOCK_MIN_TX_FEE);
  41
  42 static BlockAssembler AssemblerForTest(const CChainParams& params) {
  43     BlockAssembler::Options options;
  44
  45     options.nBlockMaxWeight = MAX_BLOCK_WEIGHT;
  46     options.blockMinFeeRate = blockMinFeeRate;
  47     return BlockAssembler(params, options);
  48 }
  49
  50 static
  51 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
  85 CBlockIndex CreateBlockIndex(int nHeight)
  86 {
  87     CBlockIndex index;
  88     index.nHeight = nHeight;
  89     index.pprev = chainActive.Tip();
  90     return index;
  91 }
  92
  93 bool TestSequenceLocks(const CTransaction &tx, int flags)
  94 {
  95     LOCK(mempool.cs);
  96     return CheckSequenceLocks(tx, flags);
  97 }
  98
  99 // Test suite for ancestor feerate transaction selection.
 100 // Implemented as an additional function, rather than a separate test case,
 101 // to allow reusing the blockchain created in CreateNewBlock_validity.
 102 void TestPackageSelection(const CChainParams& chainparams, CScript scriptPubKey, std::vector<CTransactionRef>& txFirst)
 103 {
 104     // Test the ancestor feerate transaction selection.
 105     TestMemPoolEntryHelper entry;
 106
 107     // Test that a medium fee transaction will be selected after a higher fee
 108     // rate package with a low fee rate parent.
 109     CMutableTransaction tx;
 110     tx.vin.resize(1);
 111     tx.vin[0].scriptSig = CScript() << OP_1;
 112     tx.vin[0].prevout.hash = txFirst[0]->GetHash();
 113     tx.vin[0].prevout.n = 0;
 114     tx.vout.resize(1);
 115     tx.vout[0].nValue = 5000000000LL - 1000;
 116     // This tx has a low fee: 1000 satoshis
 117     uint256 hashParentTx = tx.GetHash(); // save this txid for later use
 118     mempool.addUnchecked(hashParentTx, entry.Fee(1000).Time(GetTime()).SpendsCoinbase(true).FromTx(tx));
 119
 120     // This tx has a medium fee: 10000 satoshis
 121     tx.vin[0].prevout.hash = txFirst[1]->GetHash();
 122     tx.vout[0].nValue = 5000000000LL - 10000;
 123     uint256 hashMediumFeeTx = tx.GetHash();
 124     mempool.addUnchecked(hashMediumFeeTx, entry.Fee(10000).Time(GetTime()).SpendsCoinbase(true).FromTx(tx));
 125
 126     // This tx has a high fee, but depends on the first transaction
 127     tx.vin[0].prevout.hash = hashParentTx;
 128     tx.vout[0].nValue = 5000000000LL - 1000 - 50000; // 50k satoshi fee
 129     uint256 hashHighFeeTx = tx.GetHash();
 130     mempool.addUnchecked(hashHighFeeTx, entry.Fee(50000).Time(GetTime()).SpendsCoinbase(false).FromTx(tx));
 131
 132     std::unique_ptr<CBlockTemplate> pblocktemplate = AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey);
 133     BOOST_CHECK(pblocktemplate->block.vtx[1]->GetHash() == hashParentTx);
 134     BOOST_CHECK(pblocktemplate->block.vtx[2]->GetHash() == hashHighFeeTx);
 135     BOOST_CHECK(pblocktemplate->block.vtx[3]->GetHash() == hashMediumFeeTx);
 136
 137     // Test that a package below the block min tx fee doesn't get included
 138     tx.vin[0].prevout.hash = hashHighFeeTx;
 139     tx.vout[0].nValue = 5000000000LL - 1000 - 50000; // 0 fee
 140     uint256 hashFreeTx = tx.GetHash();
 141     mempool.addUnchecked(hashFreeTx, entry.Fee(0).FromTx(tx));
 142     size_t freeTxSize = ::GetSerializeSize(tx, SER_NETWORK, PROTOCOL_VERSION);
 143
 144     // Calculate a fee on child transaction that will put the package just
 145     // below the block min tx fee (assuming 1 child tx of the same size).
 146     CAmount feeToUse = blockMinFeeRate.GetFee(2*freeTxSize) - 1;
 147
 148     tx.vin[0].prevout.hash = hashFreeTx;
 149     tx.vout[0].nValue = 5000000000LL - 1000 - 50000 - feeToUse;
 150     uint256 hashLowFeeTx = tx.GetHash();
 151     mempool.addUnchecked(hashLowFeeTx, entry.Fee(feeToUse).FromTx(tx));
 152     pblocktemplate = AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey);
 153     // Verify that the free tx and the low fee tx didn't get selected
 154     for (size_t i=0; i<pblocktemplate->block.vtx.size(); ++i) {
 155         BOOST_CHECK(pblocktemplate->block.vtx[i]->GetHash() != hashFreeTx);
 156         BOOST_CHECK(pblocktemplate->block.vtx[i]->GetHash() != hashLowFeeTx);
 157     }
 158
 159     // Test that packages above the min relay fee do get included, even if one
 160     // of the transactions is below the min relay fee
 161     // Remove the low fee transaction and replace with a higher fee transaction
 162     mempool.removeRecursive(tx);
 163     tx.vout[0].nValue -= 2; // Now we should be just over the min relay fee
 164     hashLowFeeTx = tx.GetHash();
 165     mempool.addUnchecked(hashLowFeeTx, entry.Fee(feeToUse+2).FromTx(tx));
 166     pblocktemplate = AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey);
 167     BOOST_CHECK(pblocktemplate->block.vtx[4]->GetHash() == hashFreeTx);
 168     BOOST_CHECK(pblocktemplate->block.vtx[5]->GetHash() == hashLowFeeTx);
 169
 170     // Test that transaction selection properly updates ancestor fee
 171     // calculations as ancestor transactions get included in a block.
 172     // Add a 0-fee transaction that has 2 outputs.
 173     tx.vin[0].prevout.hash = txFirst[2]->GetHash();
 174     tx.vout.resize(2);
 175     tx.vout[0].nValue = 5000000000LL - 100000000;
 176     tx.vout[1].nValue = 100000000; // 1BTC output
 177     uint256 hashFreeTx2 = tx.GetHash();
 178     mempool.addUnchecked(hashFreeTx2, entry.Fee(0).SpendsCoinbase(true).FromTx(tx));
 179
 180     // This tx can't be mined by itself
 181     tx.vin[0].prevout.hash = hashFreeTx2;
 182     tx.vout.resize(1);
 183     feeToUse = blockMinFeeRate.GetFee(freeTxSize);
 184     tx.vout[0].nValue = 5000000000LL - 100000000 - feeToUse;
 185     uint256 hashLowFeeTx2 = tx.GetHash();
 186     mempool.addUnchecked(hashLowFeeTx2, entry.Fee(feeToUse).SpendsCoinbase(false).FromTx(tx));
 187     pblocktemplate = AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey);
 188
 189     // Verify that this tx isn't selected.
 190     for (size_t i=0; i<pblocktemplate->block.vtx.size(); ++i) {
 191         BOOST_CHECK(pblocktemplate->block.vtx[i]->GetHash() != hashFreeTx2);
 192         BOOST_CHECK(pblocktemplate->block.vtx[i]->GetHash() != hashLowFeeTx2);
 193     }
 194
 195     // This tx will be mineable, and should cause hashLowFeeTx2 to be selected
 196     // as well.
 197     tx.vin[0].prevout.n = 1;
 198     tx.vout[0].nValue = 100000000 - 10000; // 10k satoshi fee
 199     mempool.addUnchecked(tx.GetHash(), entry.Fee(10000).FromTx(tx));
 200     pblocktemplate = AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey);
 201     BOOST_CHECK(pblocktemplate->block.vtx[8]->GetHash() == hashLowFeeTx2);
 202 }
 203
 204 // NOTE: These tests rely on CreateNewBlock doing its own self-validation!
 205 BOOST_AUTO_TEST_CASE(CreateNewBlock_validity)
 206 {
 207     // Note that by default, these tests run with size accounting enabled.
 208     const auto chainParams = CreateChainParams(CBaseChainParams::MAIN);
 209     const CChainParams& chainparams = *chainParams;
 210     CScript scriptPubKey = CScript() << ParseHex("04678afdb0fe5548271967f1a67130b7105cd6a828e03909a67962e0ea1f61deb649f6bc3f4cef38c4f35504e51ec112de5c384df7ba0b8d578a4c702b6bf11d5f") << OP_CHECKSIG;
 211     std::unique_ptr<CBlockTemplate> pblocktemplate;
 212     CMutableTransaction tx,tx2;
 213     CScript script;
 214     uint256 hash;
 215     TestMemPoolEntryHelper entry;
 216     entry.nFee = 11;
 217     entry.nHeight = 11;
 218
 219     fCheckpointsEnabled = false;
 220
 221     // Simple block creation, nothing special yet:
 222     BOOST_CHECK(pblocktemplate = AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey));
 223
 224     // We can't make transactions until we have inputs
 225     // Therefore, load 100 blocks :)
 226     int baseheight = 0;
 227     std::vector<CTransactionRef> txFirst;
 228     for (unsigned int i = 0; i < sizeof(blockinfo)/sizeof(*blockinfo); ++i)
 229     {
 230         CBlock *pblock = &pblocktemplate->block; // pointer for convenience
 231         {
 232             LOCK(cs_main);
 233             pblock->nVersion = 1;
 234             pblock->nTime = chainActive.Tip()->GetMedianTimePast()+1;
 235             CMutableTransaction txCoinbase(*pblock->vtx[0]);
 236             txCoinbase.nVersion = 1;
 237             txCoinbase.vin[0].scriptSig = CScript();
 238             txCoinbase.vin[0].scriptSig.push_back(blockinfo[i].extranonce);
 239             txCoinbase.vin[0].scriptSig.push_back(chainActive.Height());
 240             txCoinbase.vout.resize(1); // Ignore the (optional) segwit commitment added by CreateNewBlock (as the hardcoded nonces don't account for this)
 241             txCoinbase.vout[0].scriptPubKey = CScript();
 242             pblock->vtx[0] = MakeTransactionRef(std::move(txCoinbase));
 243             if (txFirst.size() == 0)
 244                 baseheight = chainActive.Height();
 245             if (txFirst.size() < 4)
 246                 txFirst.push_back(pblock->vtx[0]);
 247             pblock->hashMerkleRoot = BlockMerkleRoot(*pblock);
 248             pblock->nNonce = blockinfo[i].nonce;
 249         }
 250         std::shared_ptr<const CBlock> shared_pblock = std::make_shared<const CBlock>(*pblock);
 251         BOOST_CHECK(ProcessNewBlock(chainparams, shared_pblock, true, nullptr));
 252         pblock->hashPrevBlock = pblock->GetHash();
 253     }
 254
 255     LOCK(cs_main);
 256
 257     // Just to make sure we can still make simple blocks
 258     BOOST_CHECK(pblocktemplate = AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey));
 259
 260     const CAmount BLOCKSUBSIDY = 50*COIN;
 261     const CAmount LOWFEE = CENT;
 262     const CAmount HIGHFEE = COIN;
 263     const CAmount HIGHERFEE = 4*COIN;
 264
 265     // block sigops > limit: 1000 CHECKMULTISIG + 1
 266     tx.vin.resize(1);
 267     // NOTE: OP_NOP is used to force 20 SigOps for the CHECKMULTISIG
 268     tx.vin[0].scriptSig = CScript() << OP_0 << OP_0 << OP_0 << OP_NOP << OP_CHECKMULTISIG << OP_1;
 269     tx.vin[0].prevout.hash = txFirst[0]->GetHash();
 270     tx.vin[0].prevout.n = 0;
 271     tx.vout.resize(1);
 272     tx.vout[0].nValue = BLOCKSUBSIDY;
 273     for (unsigned int i = 0; i < 1001; ++i)
 274     {
 275         tx.vout[0].nValue -= LOWFEE;
 276         hash = tx.GetHash();
 277         bool spendsCoinbase = i == 0; // only first tx spends coinbase
 278         // If we don't set the # of sig ops in the CTxMemPoolEntry, template creation fails
 279         mempool.addUnchecked(hash, entry.Fee(LOWFEE).Time(GetTime()).SpendsCoinbase(spendsCoinbase).FromTx(tx));
 280         tx.vin[0].prevout.hash = hash;
 281     }
 282
 283     BOOST_CHECK_EXCEPTION(AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey), std::runtime_error, HasReason("bad-blk-sigops"));
 284     mempool.clear();
 285
 286     tx.vin[0].prevout.hash = txFirst[0]->GetHash();
 287     tx.vout[0].nValue = BLOCKSUBSIDY;
 288     for (unsigned int i = 0; i < 1001; ++i)
 289     {
 290         tx.vout[0].nValue -= LOWFEE;
 291         hash = tx.GetHash();
 292         bool spendsCoinbase = i == 0; // only first tx spends coinbase
 293         // If we do set the # of sig ops in the CTxMemPoolEntry, template creation passes
 294         mempool.addUnchecked(hash, entry.Fee(LOWFEE).Time(GetTime()).SpendsCoinbase(spendsCoinbase).SigOpsCost(80).FromTx(tx));
 295         tx.vin[0].prevout.hash = hash;
 296     }
 297     BOOST_CHECK(pblocktemplate = AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey));
 298     mempool.clear();
 299
 300     // block size > limit
 301     tx.vin[0].scriptSig = CScript();
 302     // 18 * (520char + DROP) + OP_1 = 9433 bytes
 303     std::vector<unsigned char> vchData(520);
 304     for (unsigned int i = 0; i < 18; ++i)
 305         tx.vin[0].scriptSig << vchData << OP_DROP;
 306     tx.vin[0].scriptSig << OP_1;
 307     tx.vin[0].prevout.hash = txFirst[0]->GetHash();
 308     tx.vout[0].nValue = BLOCKSUBSIDY;
 309     for (unsigned int i = 0; i < 128; ++i)
 310     {
 311         tx.vout[0].nValue -= LOWFEE;
 312         hash = tx.GetHash();
 313         bool spendsCoinbase = i == 0; // only first tx spends coinbase
 314         mempool.addUnchecked(hash, entry.Fee(LOWFEE).Time(GetTime()).SpendsCoinbase(spendsCoinbase).FromTx(tx));
 315         tx.vin[0].prevout.hash = hash;
 316     }
 317     BOOST_CHECK(pblocktemplate = AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey));
 318     mempool.clear();
 319
 320     // orphan in mempool, template creation fails
 321     hash = tx.GetHash();
 322     mempool.addUnchecked(hash, entry.Fee(LOWFEE).Time(GetTime()).FromTx(tx));
 323     BOOST_CHECK_EXCEPTION(AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey), std::runtime_error, HasReason("bad-txns-inputs-missingorspent"));
 324     mempool.clear();
 325
 326     // child with higher feerate than parent
 327     tx.vin[0].scriptSig = CScript() << OP_1;
 328     tx.vin[0].prevout.hash = txFirst[1]->GetHash();
 329     tx.vout[0].nValue = BLOCKSUBSIDY-HIGHFEE;
 330     hash = tx.GetHash();
 331     mempool.addUnchecked(hash, entry.Fee(HIGHFEE).Time(GetTime()).SpendsCoinbase(true).FromTx(tx));
 332     tx.vin[0].prevout.hash = hash;
 333     tx.vin.resize(2);
 334     tx.vin[1].scriptSig = CScript() << OP_1;
 335     tx.vin[1].prevout.hash = txFirst[0]->GetHash();
 336     tx.vin[1].prevout.n = 0;
 337     tx.vout[0].nValue = tx.vout[0].nValue+BLOCKSUBSIDY-HIGHERFEE; //First txn output + fresh coinbase - new txn fee
 338     hash = tx.GetHash();
 339     mempool.addUnchecked(hash, entry.Fee(HIGHERFEE).Time(GetTime()).SpendsCoinbase(true).FromTx(tx));
 340     BOOST_CHECK(pblocktemplate = AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey));
 341     mempool.clear();
 342
 343     // coinbase in mempool, template creation fails
 344     tx.vin.resize(1);
 345     tx.vin[0].prevout.SetNull();
 346     tx.vin[0].scriptSig = CScript() << OP_0 << OP_1;
 347     tx.vout[0].nValue = 0;
 348     hash = tx.GetHash();
 349     // give it a fee so it'll get mined
 350     mempool.addUnchecked(hash, entry.Fee(LOWFEE).Time(GetTime()).SpendsCoinbase(false).FromTx(tx));
 351     // Should throw bad-cb-multiple
 352     BOOST_CHECK_EXCEPTION(AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey), std::runtime_error, HasReason("bad-cb-multiple"));
 353     mempool.clear();
 354
 355     // double spend txn pair in mempool, template creation fails
 356     tx.vin[0].prevout.hash = txFirst[0]->GetHash();
 357     tx.vin[0].scriptSig = CScript() << OP_1;
 358     tx.vout[0].nValue = BLOCKSUBSIDY-HIGHFEE;
 359     tx.vout[0].scriptPubKey = CScript() << OP_1;
 360     hash = tx.GetHash();
 361     mempool.addUnchecked(hash, entry.Fee(HIGHFEE).Time(GetTime()).SpendsCoinbase(true).FromTx(tx));
 362     tx.vout[0].scriptPubKey = CScript() << OP_2;
 363     hash = tx.GetHash();
 364     mempool.addUnchecked(hash, entry.Fee(HIGHFEE).Time(GetTime()).SpendsCoinbase(true).FromTx(tx));
 365     BOOST_CHECK_EXCEPTION(AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey), std::runtime_error, HasReason("bad-txns-inputs-missingorspent"));
 366     mempool.clear();
 367
 368     // subsidy changing
 369     int nHeight = chainActive.Height();
 370     // Create an actual 209999-long block chain (without valid blocks).
 371     while (chainActive.Tip()->nHeight < 209999) {
 372         CBlockIndex* prev = chainActive.Tip();
 373         CBlockIndex* next = new CBlockIndex();
 374         next->phashBlock = new uint256(InsecureRand256());
 375         pcoinsTip->SetBestBlock(next->GetBlockHash());
 376         next->pprev = prev;
 377         next->nHeight = prev->nHeight + 1;
 378         next->BuildSkip();
 379         chainActive.SetTip(next);
 380     }
 381     BOOST_CHECK(pblocktemplate = AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey));
 382     // Extend to a 210000-long block chain.
 383     while (chainActive.Tip()->nHeight < 210000) {
 384         CBlockIndex* prev = chainActive.Tip();
 385         CBlockIndex* next = new CBlockIndex();
 386         next->phashBlock = new uint256(InsecureRand256());
 387         pcoinsTip->SetBestBlock(next->GetBlockHash());
 388         next->pprev = prev;
 389         next->nHeight = prev->nHeight + 1;
 390         next->BuildSkip();
 391         chainActive.SetTip(next);
 392     }
 393     BOOST_CHECK(pblocktemplate = AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey));
 394
 395     // invalid p2sh txn in mempool, template creation fails
 396     tx.vin[0].prevout.hash = txFirst[0]->GetHash();
 397     tx.vin[0].prevout.n = 0;
 398     tx.vin[0].scriptSig = CScript() << OP_1;
 399     tx.vout[0].nValue = BLOCKSUBSIDY-LOWFEE;
 400     script = CScript() << OP_0;
 401     tx.vout[0].scriptPubKey = GetScriptForDestination(CScriptID(script));
 402     hash = tx.GetHash();
 403     mempool.addUnchecked(hash, entry.Fee(LOWFEE).Time(GetTime()).SpendsCoinbase(true).FromTx(tx));
 404     tx.vin[0].prevout.hash = hash;
 405     tx.vin[0].scriptSig = CScript() << std::vector<unsigned char>(script.begin(), script.end());
 406     tx.vout[0].nValue -= LOWFEE;
 407     hash = tx.GetHash();
 408     mempool.addUnchecked(hash, entry.Fee(LOWFEE).Time(GetTime()).SpendsCoinbase(false).FromTx(tx));
 409     // Should throw block-validation-failed
 410     BOOST_CHECK_EXCEPTION(AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey), std::runtime_error, HasReason("block-validation-failed"));
 411     mempool.clear();
 412
 413     // Delete the dummy blocks again.
 414     while (chainActive.Tip()->nHeight > nHeight) {
 415         CBlockIndex* del = chainActive.Tip();
 416         chainActive.SetTip(del->pprev);
 417         pcoinsTip->SetBestBlock(del->pprev->GetBlockHash());
 418         delete del->phashBlock;
 419         delete del;
 420     }
 421
 422     // non-final txs in mempool
 423     SetMockTime(chainActive.Tip()->GetMedianTimePast()+1);
 424     int flags = LOCKTIME_VERIFY_SEQUENCE|LOCKTIME_MEDIAN_TIME_PAST;
 425     // height map
 426     std::vector<int> prevheights;
 427
 428     // relative height locked
 429     tx.nVersion = 2;
 430     tx.vin.resize(1);
 431     prevheights.resize(1);
 432     tx.vin[0].prevout.hash = txFirst[0]->GetHash(); // only 1 transaction
 433     tx.vin[0].prevout.n = 0;
 434     tx.vin[0].scriptSig = CScript() << OP_1;
 435     tx.vin[0].nSequence = chainActive.Tip()->nHeight + 1; // txFirst[0] is the 2nd block
 436     prevheights[0] = baseheight + 1;
 437     tx.vout.resize(1);
 438     tx.vout[0].nValue = BLOCKSUBSIDY-HIGHFEE;
 439     tx.vout[0].scriptPubKey = CScript() << OP_1;
 440     tx.nLockTime = 0;
 441     hash = tx.GetHash();
 442     mempool.addUnchecked(hash, entry.Fee(HIGHFEE).Time(GetTime()).SpendsCoinbase(true).FromTx(tx));
 443     BOOST_CHECK(CheckFinalTx(tx, flags)); // Locktime passes
 444     BOOST_CHECK(!TestSequenceLocks(tx, flags)); // Sequence locks fail
 445     BOOST_CHECK(SequenceLocks(tx, flags, &prevheights, CreateBlockIndex(chainActive.Tip()->nHeight + 2))); // Sequence locks pass on 2nd block
 446
 447     // relative time locked
 448     tx.vin[0].prevout.hash = txFirst[1]->GetHash();
 449     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
 450     prevheights[0] = baseheight + 2;
 451     hash = tx.GetHash();
 452     mempool.addUnchecked(hash, entry.Time(GetTime()).FromTx(tx));
 453     BOOST_CHECK(CheckFinalTx(tx, flags)); // Locktime passes
 454     BOOST_CHECK(!TestSequenceLocks(tx, flags)); // Sequence locks fail
 455
 456     for (int i = 0; i < CBlockIndex::nMedianTimeSpan; i++)
 457         chainActive.Tip()->GetAncestor(chainActive.Tip()->nHeight - i)->nTime += 512; //Trick the MedianTimePast
 458     BOOST_CHECK(SequenceLocks(tx, flags, &prevheights, CreateBlockIndex(chainActive.Tip()->nHeight + 1))); // Sequence locks pass 512 seconds later
 459     for (int i = 0; i < CBlockIndex::nMedianTimeSpan; i++)
 460         chainActive.Tip()->GetAncestor(chainActive.Tip()->nHeight - i)->nTime -= 512; //undo tricked MTP
 461
 462     // absolute height locked
 463     tx.vin[0].prevout.hash = txFirst[2]->GetHash();
 464     tx.vin[0].nSequence = CTxIn::SEQUENCE_FINAL - 1;
 465     prevheights[0] = baseheight + 3;
 466     tx.nLockTime = chainActive.Tip()->nHeight + 1;
 467     hash = tx.GetHash();
 468     mempool.addUnchecked(hash, entry.Time(GetTime()).FromTx(tx));
 469     BOOST_CHECK(!CheckFinalTx(tx, flags)); // Locktime fails
 470     BOOST_CHECK(TestSequenceLocks(tx, flags)); // Sequence locks pass
 471     BOOST_CHECK(IsFinalTx(tx, chainActive.Tip()->nHeight + 2, chainActive.Tip()->GetMedianTimePast())); // Locktime passes on 2nd block
 472
 473     // absolute time locked
 474     tx.vin[0].prevout.hash = txFirst[3]->GetHash();
 475     tx.nLockTime = chainActive.Tip()->GetMedianTimePast();
 476     prevheights.resize(1);
 477     prevheights[0] = baseheight + 4;
 478     hash = tx.GetHash();
 479     mempool.addUnchecked(hash, entry.Time(GetTime()).FromTx(tx));
 480     BOOST_CHECK(!CheckFinalTx(tx, flags)); // Locktime fails
 481     BOOST_CHECK(TestSequenceLocks(tx, flags)); // Sequence locks pass
 482     BOOST_CHECK(IsFinalTx(tx, chainActive.Tip()->nHeight + 2, chainActive.Tip()->GetMedianTimePast() + 1)); // Locktime passes 1 second later
 483
 484     // mempool-dependent transactions (not added)
 485     tx.vin[0].prevout.hash = hash;
 486     prevheights[0] = chainActive.Tip()->nHeight + 1;
 487     tx.nLockTime = 0;
 488     tx.vin[0].nSequence = 0;
 489     BOOST_CHECK(CheckFinalTx(tx, flags)); // Locktime passes
 490     BOOST_CHECK(TestSequenceLocks(tx, flags)); // Sequence locks pass
 491     tx.vin[0].nSequence = 1;
 492     BOOST_CHECK(!TestSequenceLocks(tx, flags)); // Sequence locks fail
 493     tx.vin[0].nSequence = CTxIn::SEQUENCE_LOCKTIME_TYPE_FLAG;
 494     BOOST_CHECK(TestSequenceLocks(tx, flags)); // Sequence locks pass
 495     tx.vin[0].nSequence = CTxIn::SEQUENCE_LOCKTIME_TYPE_FLAG | 1;
 496     BOOST_CHECK(!TestSequenceLocks(tx, flags)); // Sequence locks fail
 497
 498     BOOST_CHECK(pblocktemplate = AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey));
 499
 500     // None of the of the absolute height/time locked tx should have made
 501     // it into the template because we still check IsFinalTx in CreateNewBlock,
 502     // but relative locked txs will if inconsistently added to mempool.
 503     // For now these will still generate a valid template until BIP68 soft fork
 504     BOOST_CHECK_EQUAL(pblocktemplate->block.vtx.size(), 3);
 505     // However if we advance height by 1 and time by 512, all of them should be mined
 506     for (int i = 0; i < CBlockIndex::nMedianTimeSpan; i++)
 507         chainActive.Tip()->GetAncestor(chainActive.Tip()->nHeight - i)->nTime += 512; //Trick the MedianTimePast
 508     chainActive.Tip()->nHeight++;
 509     SetMockTime(chainActive.Tip()->GetMedianTimePast() + 1);
 510
 511     BOOST_CHECK(pblocktemplate = AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey));
 512     BOOST_CHECK_EQUAL(pblocktemplate->block.vtx.size(), 5);
 513
 514     chainActive.Tip()->nHeight--;
 515     SetMockTime(0);
 516     mempool.clear();
 517
 518     TestPackageSelection(chainparams, scriptPubKey, txFirst);
 519
 520     fCheckpointsEnabled = true;
 521 }
 522
 523 BOOST_AUTO_TEST_SUITE_END()