src/test/miner_tests.cpp

   1 // Copyright (c) 2011-2016 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 static CFeeRate blockMinFeeRate = CFeeRate(DEFAULT_BLOCK_MIN_TX_FEE);
  30
  31 static BlockAssembler AssemblerForTest(const CChainParams& params) {
  32     BlockAssembler::Options options;
  33
  34     options.nBlockMaxWeight = MAX_BLOCK_WEIGHT;
  35     options.nBlockMaxSize = MAX_BLOCK_SERIALIZED_SIZE;
  36     options.blockMinFeeRate = blockMinFeeRate;
  37     return BlockAssembler(params, options);
  38 }
  39
  40 static
  41 struct {
  42     unsigned char extranonce;
  43     unsigned int nonce;
  44 } blockinfo[] = {
  45     {4, 0xa4a3e223}, {2, 0x15c32f9e}, {1, 0x0375b547}, {1, 0x7004a8a5},
  46     {2, 0xce440296}, {2, 0x52cfe198}, {1, 0x77a72cd0}, {2, 0xbb5d6f84},
  47     {2, 0x83f30c2c}, {1, 0x48a73d5b}, {1, 0xef7dcd01}, {2, 0x6809c6c4},
  48     {2, 0x0883ab3c}, {1, 0x087bbbe2}, {2, 0x2104a814}, {2, 0xdffb6daa},
  49     {1, 0xee8a0a08}, {2, 0xba4237c1}, {1, 0xa70349dc}, {1, 0x344722bb},
  50     {3, 0xd6294733}, {2, 0xec9f5c94}, {2, 0xca2fbc28}, {1, 0x6ba4f406},
  51     {2, 0x015d4532}, {1, 0x6e119b7c}, {2, 0x43e8f314}, {2, 0x27962f38},
  52     {2, 0xb571b51b}, {2, 0xb36bee23}, {2, 0xd17924a8}, {2, 0x6bc212d9},
  53     {1, 0x630d4948}, {2, 0x9a4c4ebb}, {2, 0x554be537}, {1, 0xd63ddfc7},
  54     {2, 0xa10acc11}, {1, 0x759a8363}, {2, 0xfb73090d}, {1, 0xe82c6a34},
  55     {1, 0xe33e92d7}, {3, 0x658ef5cb}, {2, 0xba32ff22}, {5, 0x0227a10c},
  56     {1, 0xa9a70155}, {5, 0xd096d809}, {1, 0x37176174}, {1, 0x830b8d0f},
  57     {1, 0xc6e3910e}, {2, 0x823f3ca8}, {1, 0x99850849}, {1, 0x7521fb81},
  58     {1, 0xaacaabab}, {1, 0xd645a2eb}, {5, 0x7aea1781}, {5, 0x9d6e4b78},
  59     {1, 0x4ce90fd8}, {1, 0xabdc832d}, {6, 0x4a34f32a}, {2, 0xf2524c1c},
  60     {2, 0x1bbeb08a}, {1, 0xad47f480}, {1, 0x9f026aeb}, {1, 0x15a95049},
  61     {2, 0xd1cb95b2}, {2, 0xf84bbda5}, {1, 0x0fa62cd1}, {1, 0xe05f9169},
  62     {1, 0x78d194a9}, {5, 0x3e38147b}, {5, 0x737ba0d4}, {1, 0x63378e10},
  63     {1, 0x6d5f91cf}, {2, 0x88612eb8}, {2, 0xe9639484}, {1, 0xb7fabc9d},
  64     {2, 0x19b01592}, {1, 0x5a90dd31}, {2, 0x5bd7e028}, {2, 0x94d00323},
  65     {1, 0xa9b9c01a}, {1, 0x3a40de61}, {1, 0x56e7eec7}, {5, 0x859f7ef6},
  66     {1, 0xfd8e5630}, {1, 0x2b0c9f7f}, {1, 0xba700e26}, {1, 0x7170a408},
  67     {1, 0x70de86a8}, {1, 0x74d64cd5}, {1, 0x49e738a1}, {2, 0x6910b602},
  68     {0, 0x643c565f}, {1, 0x54264b3f}, {2, 0x97ea6396}, {2, 0x55174459},
  69     {2, 0x03e8779a}, {1, 0x98f34d8f}, {1, 0xc07b2b07}, {1, 0xdfe29668},
  70     {1, 0x3141c7c1}, {1, 0xb3b595f4}, {1, 0x735abf08}, {5, 0x623bfbce},
  71     {2, 0xd351e722}, {1, 0xf4ca48c9}, {1, 0x5b19c670}, {1, 0xa164bf0e},
  72     {2, 0xbbbeb305}, {2, 0xfe1c810a},
  73 };
  74
  75 CBlockIndex CreateBlockIndex(int nHeight)
  76 {
  77     CBlockIndex index;
  78     index.nHeight = nHeight;
  79     index.pprev = chainActive.Tip();
  80     return index;
  81 }
  82
  83 bool TestSequenceLocks(const CTransaction &tx, int flags)
  84 {
  85     LOCK(mempool.cs);
  86     return CheckSequenceLocks(tx, flags);
  87 }
  88
  89 // Test suite for ancestor feerate transaction selection.
  90 // Implemented as an additional function, rather than a separate test case,
  91 // to allow reusing the blockchain created in CreateNewBlock_validity.
  92 void TestPackageSelection(const CChainParams& chainparams, CScript scriptPubKey, std::vector<CTransactionRef>& txFirst)
  93 {
  94     // Test the ancestor feerate transaction selection.
  95     TestMemPoolEntryHelper entry;
  96
  97     // Test that a medium fee transaction will be selected after a higher fee
  98     // rate package with a low fee rate parent.
  99     CMutableTransaction tx;
 100     tx.vin.resize(1);
 101     tx.vin[0].scriptSig = CScript() << OP_1;
 102     tx.vin[0].prevout.hash = txFirst[0]->GetHash();
 103     tx.vin[0].prevout.n = 0;
 104     tx.vout.resize(1);
 105     tx.vout[0].nValue = 5000000000LL - 1000;
 106     // This tx has a low fee: 1000 satoshis
 107     uint256 hashParentTx = tx.GetHash(); // save this txid for later use
 108     mempool.addUnchecked(hashParentTx, entry.Fee(1000).Time(GetTime()).SpendsCoinbase(true).FromTx(tx));
 109
 110     // This tx has a medium fee: 10000 satoshis
 111     tx.vin[0].prevout.hash = txFirst[1]->GetHash();
 112     tx.vout[0].nValue = 5000000000LL - 10000;
 113     uint256 hashMediumFeeTx = tx.GetHash();
 114     mempool.addUnchecked(hashMediumFeeTx, entry.Fee(10000).Time(GetTime()).SpendsCoinbase(true).FromTx(tx));
 115
 116     // This tx has a high fee, but depends on the first transaction
 117     tx.vin[0].prevout.hash = hashParentTx;
 118     tx.vout[0].nValue = 5000000000LL - 1000 - 50000; // 50k satoshi fee
 119     uint256 hashHighFeeTx = tx.GetHash();
 120     mempool.addUnchecked(hashHighFeeTx, entry.Fee(50000).Time(GetTime()).SpendsCoinbase(false).FromTx(tx));
 121
 122     std::unique_ptr<CBlockTemplate> pblocktemplate = AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey);
 123     BOOST_CHECK(pblocktemplate->block.vtx[1]->GetHash() == hashParentTx);
 124     BOOST_CHECK(pblocktemplate->block.vtx[2]->GetHash() == hashHighFeeTx);
 125     BOOST_CHECK(pblocktemplate->block.vtx[3]->GetHash() == hashMediumFeeTx);
 126
 127     // Test that a package below the block min tx fee doesn't get included
 128     tx.vin[0].prevout.hash = hashHighFeeTx;
 129     tx.vout[0].nValue = 5000000000LL - 1000 - 50000; // 0 fee
 130     uint256 hashFreeTx = tx.GetHash();
 131     mempool.addUnchecked(hashFreeTx, entry.Fee(0).FromTx(tx));
 132     size_t freeTxSize = ::GetSerializeSize(tx, SER_NETWORK, PROTOCOL_VERSION);
 133
 134     // Calculate a fee on child transaction that will put the package just
 135     // below the block min tx fee (assuming 1 child tx of the same size).
 136     CAmount feeToUse = blockMinFeeRate.GetFee(2*freeTxSize) - 1;
 137
 138     tx.vin[0].prevout.hash = hashFreeTx;
 139     tx.vout[0].nValue = 5000000000LL - 1000 - 50000 - feeToUse;
 140     uint256 hashLowFeeTx = tx.GetHash();
 141     mempool.addUnchecked(hashLowFeeTx, entry.Fee(feeToUse).FromTx(tx));
 142     pblocktemplate = AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey);
 143     // Verify that the free tx and the low fee tx didn't get selected
 144     for (size_t i=0; i<pblocktemplate->block.vtx.size(); ++i) {
 145         BOOST_CHECK(pblocktemplate->block.vtx[i]->GetHash() != hashFreeTx);
 146         BOOST_CHECK(pblocktemplate->block.vtx[i]->GetHash() != hashLowFeeTx);
 147     }
 148
 149     // Test that packages above the min relay fee do get included, even if one
 150     // of the transactions is below the min relay fee
 151     // Remove the low fee transaction and replace with a higher fee transaction
 152     mempool.removeRecursive(tx);
 153     tx.vout[0].nValue -= 2; // Now we should be just over the min relay fee
 154     hashLowFeeTx = tx.GetHash();
 155     mempool.addUnchecked(hashLowFeeTx, entry.Fee(feeToUse+2).FromTx(tx));
 156     pblocktemplate = AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey);
 157     BOOST_CHECK(pblocktemplate->block.vtx[4]->GetHash() == hashFreeTx);
 158     BOOST_CHECK(pblocktemplate->block.vtx[5]->GetHash() == hashLowFeeTx);
 159
 160     // Test that transaction selection properly updates ancestor fee
 161     // calculations as ancestor transactions get included in a block.
 162     // Add a 0-fee transaction that has 2 outputs.
 163     tx.vin[0].prevout.hash = txFirst[2]->GetHash();
 164     tx.vout.resize(2);
 165     tx.vout[0].nValue = 5000000000LL - 100000000;
 166     tx.vout[1].nValue = 100000000; // 1BTC output
 167     uint256 hashFreeTx2 = tx.GetHash();
 168     mempool.addUnchecked(hashFreeTx2, entry.Fee(0).SpendsCoinbase(true).FromTx(tx));
 169
 170     // This tx can't be mined by itself
 171     tx.vin[0].prevout.hash = hashFreeTx2;
 172     tx.vout.resize(1);
 173     feeToUse = blockMinFeeRate.GetFee(freeTxSize);
 174     tx.vout[0].nValue = 5000000000LL - 100000000 - feeToUse;
 175     uint256 hashLowFeeTx2 = tx.GetHash();
 176     mempool.addUnchecked(hashLowFeeTx2, entry.Fee(feeToUse).SpendsCoinbase(false).FromTx(tx));
 177     pblocktemplate = AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey);
 178
 179     // Verify that this tx isn't selected.
 180     for (size_t i=0; i<pblocktemplate->block.vtx.size(); ++i) {
 181         BOOST_CHECK(pblocktemplate->block.vtx[i]->GetHash() != hashFreeTx2);
 182         BOOST_CHECK(pblocktemplate->block.vtx[i]->GetHash() != hashLowFeeTx2);
 183     }
 184
 185     // This tx will be mineable, and should cause hashLowFeeTx2 to be selected
 186     // as well.
 187     tx.vin[0].prevout.n = 1;
 188     tx.vout[0].nValue = 100000000 - 10000; // 10k satoshi fee
 189     mempool.addUnchecked(tx.GetHash(), entry.Fee(10000).FromTx(tx));
 190     pblocktemplate = AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey);
 191     BOOST_CHECK(pblocktemplate->block.vtx[8]->GetHash() == hashLowFeeTx2);
 192 }
 193
 194 // NOTE: These tests rely on CreateNewBlock doing its own self-validation!
 195 BOOST_AUTO_TEST_CASE(CreateNewBlock_validity)
 196 {
 197     // Note that by default, these tests run with size accounting enabled.
 198     const auto chainParams = CreateChainParams(CBaseChainParams::MAIN);
 199     const CChainParams& chainparams = *chainParams;
 200     CScript scriptPubKey = CScript() << ParseHex("04678afdb0fe5548271967f1a67130b7105cd6a828e03909a67962e0ea1f61deb649f6bc3f4cef38c4f35504e51ec112de5c384df7ba0b8d578a4c702b6bf11d5f") << OP_CHECKSIG;
 201     std::unique_ptr<CBlockTemplate> pblocktemplate;
 202     CMutableTransaction tx,tx2;
 203     CScript script;
 204     uint256 hash;
 205     TestMemPoolEntryHelper entry;
 206     entry.nFee = 11;
 207     entry.nHeight = 11;
 208
 209     LOCK(cs_main);
 210     fCheckpointsEnabled = false;
 211
 212     // Simple block creation, nothing special yet:
 213     BOOST_CHECK(pblocktemplate = AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey));
 214
 215     // We can't make transactions until we have inputs
 216     // Therefore, load 100 blocks :)
 217     int baseheight = 0;
 218     std::vector<CTransactionRef> txFirst;
 219     for (unsigned int i = 0; i < sizeof(blockinfo)/sizeof(*blockinfo); ++i)
 220     {
 221         CBlock *pblock = &pblocktemplate->block; // pointer for convenience
 222         pblock->nVersion = 1;
 223         pblock->nTime = chainActive.Tip()->GetMedianTimePast()+1;
 224         CMutableTransaction txCoinbase(*pblock->vtx[0]);
 225         txCoinbase.nVersion = 1;
 226         txCoinbase.vin[0].scriptSig = CScript();
 227         txCoinbase.vin[0].scriptSig.push_back(blockinfo[i].extranonce);
 228         txCoinbase.vin[0].scriptSig.push_back(chainActive.Height());
 229         txCoinbase.vout.resize(1); // Ignore the (optional) segwit commitment added by CreateNewBlock (as the hardcoded nonces don't account for this)
 230         txCoinbase.vout[0].scriptPubKey = CScript();
 231         pblock->vtx[0] = MakeTransactionRef(std::move(txCoinbase));
 232         if (txFirst.size() == 0)
 233             baseheight = chainActive.Height();
 234         if (txFirst.size() < 4)
 235             txFirst.push_back(pblock->vtx[0]);
 236         pblock->hashMerkleRoot = BlockMerkleRoot(*pblock);
 237         pblock->nNonce = blockinfo[i].nonce;
 238         std::shared_ptr<const CBlock> shared_pblock = std::make_shared<const CBlock>(*pblock);
 239         BOOST_CHECK(ProcessNewBlock(chainparams, shared_pblock, true, NULL));
 240         pblock->hashPrevBlock = pblock->GetHash();
 241     }
 242
 243     // Just to make sure we can still make simple blocks
 244     BOOST_CHECK(pblocktemplate = AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey));
 245
 246     const CAmount BLOCKSUBSIDY = 50*COIN;
 247     const CAmount LOWFEE = CENT;
 248     const CAmount HIGHFEE = COIN;
 249     const CAmount HIGHERFEE = 4*COIN;
 250
 251     // block sigops > limit: 1000 CHECKMULTISIG + 1
 252     tx.vin.resize(1);
 253     // NOTE: OP_NOP is used to force 20 SigOps for the CHECKMULTISIG
 254     tx.vin[0].scriptSig = CScript() << OP_0 << OP_0 << OP_0 << OP_NOP << OP_CHECKMULTISIG << OP_1;
 255     tx.vin[0].prevout.hash = txFirst[0]->GetHash();
 256     tx.vin[0].prevout.n = 0;
 257     tx.vout.resize(1);
 258     tx.vout[0].nValue = BLOCKSUBSIDY;
 259     for (unsigned int i = 0; i < 1001; ++i)
 260     {
 261         tx.vout[0].nValue -= LOWFEE;
 262         hash = tx.GetHash();
 263         bool spendsCoinbase = (i == 0) ? true : false; // only first tx spends coinbase
 264         // If we don't set the # of sig ops in the CTxMemPoolEntry, template creation fails
 265         mempool.addUnchecked(hash, entry.Fee(LOWFEE).Time(GetTime()).SpendsCoinbase(spendsCoinbase).FromTx(tx));
 266         tx.vin[0].prevout.hash = hash;
 267     }
 268     BOOST_CHECK_THROW(AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey), std::runtime_error);
 269     mempool.clear();
 270
 271     tx.vin[0].prevout.hash = txFirst[0]->GetHash();
 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) ? true : false; // only first tx spends coinbase
 278         // If we do set the # of sig ops in the CTxMemPoolEntry, template creation passes
 279         mempool.addUnchecked(hash, entry.Fee(LOWFEE).Time(GetTime()).SpendsCoinbase(spendsCoinbase).SigOpsCost(80).FromTx(tx));
 280         tx.vin[0].prevout.hash = hash;
 281     }
 282     BOOST_CHECK(pblocktemplate = AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey));
 283     mempool.clear();
 284
 285     // block size > limit
 286     tx.vin[0].scriptSig = CScript();
 287     // 18 * (520char + DROP) + OP_1 = 9433 bytes
 288     std::vector<unsigned char> vchData(520);
 289     for (unsigned int i = 0; i < 18; ++i)
 290         tx.vin[0].scriptSig << vchData << OP_DROP;
 291     tx.vin[0].scriptSig << OP_1;
 292     tx.vin[0].prevout.hash = txFirst[0]->GetHash();
 293     tx.vout[0].nValue = BLOCKSUBSIDY;
 294     for (unsigned int i = 0; i < 128; ++i)
 295     {
 296         tx.vout[0].nValue -= LOWFEE;
 297         hash = tx.GetHash();
 298         bool spendsCoinbase = (i == 0) ? true : false; // only first tx spends coinbase
 299         mempool.addUnchecked(hash, entry.Fee(LOWFEE).Time(GetTime()).SpendsCoinbase(spendsCoinbase).FromTx(tx));
 300         tx.vin[0].prevout.hash = hash;
 301     }
 302     BOOST_CHECK(pblocktemplate = AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey));
 303     mempool.clear();
 304
 305     // orphan in mempool, template creation fails
 306     hash = tx.GetHash();
 307     mempool.addUnchecked(hash, entry.Fee(LOWFEE).Time(GetTime()).FromTx(tx));
 308     BOOST_CHECK_THROW(AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey), std::runtime_error);
 309     mempool.clear();
 310
 311     // child with higher feerate than parent
 312     tx.vin[0].scriptSig = CScript() << OP_1;
 313     tx.vin[0].prevout.hash = txFirst[1]->GetHash();
 314     tx.vout[0].nValue = BLOCKSUBSIDY-HIGHFEE;
 315     hash = tx.GetHash();
 316     mempool.addUnchecked(hash, entry.Fee(HIGHFEE).Time(GetTime()).SpendsCoinbase(true).FromTx(tx));
 317     tx.vin[0].prevout.hash = hash;
 318     tx.vin.resize(2);
 319     tx.vin[1].scriptSig = CScript() << OP_1;
 320     tx.vin[1].prevout.hash = txFirst[0]->GetHash();
 321     tx.vin[1].prevout.n = 0;
 322     tx.vout[0].nValue = tx.vout[0].nValue+BLOCKSUBSIDY-HIGHERFEE; //First txn output + fresh coinbase - new txn fee
 323     hash = tx.GetHash();
 324     mempool.addUnchecked(hash, entry.Fee(HIGHERFEE).Time(GetTime()).SpendsCoinbase(true).FromTx(tx));
 325     BOOST_CHECK(pblocktemplate = AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey));
 326     mempool.clear();
 327
 328     // coinbase in mempool, template creation fails
 329     tx.vin.resize(1);
 330     tx.vin[0].prevout.SetNull();
 331     tx.vin[0].scriptSig = CScript() << OP_0 << OP_1;
 332     tx.vout[0].nValue = 0;
 333     hash = tx.GetHash();
 334     // give it a fee so it'll get mined
 335     mempool.addUnchecked(hash, entry.Fee(LOWFEE).Time(GetTime()).SpendsCoinbase(false).FromTx(tx));
 336     BOOST_CHECK_THROW(AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey), std::runtime_error);
 337     mempool.clear();
 338
 339     // invalid (pre-p2sh) txn in mempool, template creation fails
 340     tx.vin[0].prevout.hash = txFirst[0]->GetHash();
 341     tx.vin[0].prevout.n = 0;
 342     tx.vin[0].scriptSig = CScript() << OP_1;
 343     tx.vout[0].nValue = BLOCKSUBSIDY-LOWFEE;
 344     script = CScript() << OP_0;
 345     tx.vout[0].scriptPubKey = GetScriptForDestination(CScriptID(script));
 346     hash = tx.GetHash();
 347     mempool.addUnchecked(hash, entry.Fee(LOWFEE).Time(GetTime()).SpendsCoinbase(true).FromTx(tx));
 348     tx.vin[0].prevout.hash = hash;
 349     tx.vin[0].scriptSig = CScript() << std::vector<unsigned char>(script.begin(), script.end());
 350     tx.vout[0].nValue -= LOWFEE;
 351     hash = tx.GetHash();
 352     mempool.addUnchecked(hash, entry.Fee(LOWFEE).Time(GetTime()).SpendsCoinbase(false).FromTx(tx));
 353     BOOST_CHECK_THROW(AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey), std::runtime_error);
 354     mempool.clear();
 355
 356     // double spend txn pair in mempool, template creation fails
 357     tx.vin[0].prevout.hash = txFirst[0]->GetHash();
 358     tx.vin[0].scriptSig = CScript() << OP_1;
 359     tx.vout[0].nValue = BLOCKSUBSIDY-HIGHFEE;
 360     tx.vout[0].scriptPubKey = CScript() << OP_1;
 361     hash = tx.GetHash();
 362     mempool.addUnchecked(hash, entry.Fee(HIGHFEE).Time(GetTime()).SpendsCoinbase(true).FromTx(tx));
 363     tx.vout[0].scriptPubKey = CScript() << OP_2;
 364     hash = tx.GetHash();
 365     mempool.addUnchecked(hash, entry.Fee(HIGHFEE).Time(GetTime()).SpendsCoinbase(true).FromTx(tx));
 366     BOOST_CHECK_THROW(AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey), std::runtime_error);
 367     mempool.clear();
 368
 369     // subsidy changing
 370     int nHeight = chainActive.Height();
 371     // Create an actual 209999-long block chain (without valid blocks).
 372     while (chainActive.Tip()->nHeight < 209999) {
 373         CBlockIndex* prev = chainActive.Tip();
 374         CBlockIndex* next = new CBlockIndex();
 375         next->phashBlock = new uint256(InsecureRand256());
 376         pcoinsTip->SetBestBlock(next->GetBlockHash());
 377         next->pprev = prev;
 378         next->nHeight = prev->nHeight + 1;
 379         next->BuildSkip();
 380         chainActive.SetTip(next);
 381     }
 382     BOOST_CHECK(pblocktemplate = AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey));
 383     // Extend to a 210000-long block chain.
 384     while (chainActive.Tip()->nHeight < 210000) {
 385         CBlockIndex* prev = chainActive.Tip();
 386         CBlockIndex* next = new CBlockIndex();
 387         next->phashBlock = new uint256(InsecureRand256());
 388         pcoinsTip->SetBestBlock(next->GetBlockHash());
 389         next->pprev = prev;
 390         next->nHeight = prev->nHeight + 1;
 391         next->BuildSkip();
 392         chainActive.SetTip(next);
 393     }
 394     BOOST_CHECK(pblocktemplate = AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey));
 395     // Delete the dummy blocks again.
 396     while (chainActive.Tip()->nHeight > nHeight) {
 397         CBlockIndex* del = chainActive.Tip();
 398         chainActive.SetTip(del->pprev);
 399         pcoinsTip->SetBestBlock(del->pprev->GetBlockHash());
 400         delete del->phashBlock;
 401         delete del;
 402     }
 403
 404     // non-final txs in mempool
 405     SetMockTime(chainActive.Tip()->GetMedianTimePast()+1);
 406     int flags = LOCKTIME_VERIFY_SEQUENCE|LOCKTIME_MEDIAN_TIME_PAST;
 407     // height map
 408     std::vector<int> prevheights;
 409
 410     // relative height locked
 411     tx.nVersion = 2;
 412     tx.vin.resize(1);
 413     prevheights.resize(1);
 414     tx.vin[0].prevout.hash = txFirst[0]->GetHash(); // only 1 transaction
 415     tx.vin[0].prevout.n = 0;
 416     tx.vin[0].scriptSig = CScript() << OP_1;
 417     tx.vin[0].nSequence = chainActive.Tip()->nHeight + 1; // txFirst[0] is the 2nd block
 418     prevheights[0] = baseheight + 1;
 419     tx.vout.resize(1);
 420     tx.vout[0].nValue = BLOCKSUBSIDY-HIGHFEE;
 421     tx.vout[0].scriptPubKey = CScript() << OP_1;
 422     tx.nLockTime = 0;
 423     hash = tx.GetHash();
 424     mempool.addUnchecked(hash, entry.Fee(HIGHFEE).Time(GetTime()).SpendsCoinbase(true).FromTx(tx));
 425     BOOST_CHECK(CheckFinalTx(tx, flags)); // Locktime passes
 426     BOOST_CHECK(!TestSequenceLocks(tx, flags)); // Sequence locks fail
 427     BOOST_CHECK(SequenceLocks(tx, flags, &prevheights, CreateBlockIndex(chainActive.Tip()->nHeight + 2))); // Sequence locks pass on 2nd block
 428
 429     // relative time locked
 430     tx.vin[0].prevout.hash = txFirst[1]->GetHash();
 431     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
 432     prevheights[0] = baseheight + 2;
 433     hash = tx.GetHash();
 434     mempool.addUnchecked(hash, entry.Time(GetTime()).FromTx(tx));
 435     BOOST_CHECK(CheckFinalTx(tx, flags)); // Locktime passes
 436     BOOST_CHECK(!TestSequenceLocks(tx, flags)); // Sequence locks fail
 437
 438     for (int i = 0; i < CBlockIndex::nMedianTimeSpan; i++)
 439         chainActive.Tip()->GetAncestor(chainActive.Tip()->nHeight - i)->nTime += 512; //Trick the MedianTimePast
 440     BOOST_CHECK(SequenceLocks(tx, flags, &prevheights, CreateBlockIndex(chainActive.Tip()->nHeight + 1))); // Sequence locks pass 512 seconds later
 441     for (int i = 0; i < CBlockIndex::nMedianTimeSpan; i++)
 442         chainActive.Tip()->GetAncestor(chainActive.Tip()->nHeight - i)->nTime -= 512; //undo tricked MTP
 443
 444     // absolute height locked
 445     tx.vin[0].prevout.hash = txFirst[2]->GetHash();
 446     tx.vin[0].nSequence = CTxIn::SEQUENCE_FINAL - 1;
 447     prevheights[0] = baseheight + 3;
 448     tx.nLockTime = chainActive.Tip()->nHeight + 1;
 449     hash = tx.GetHash();
 450     mempool.addUnchecked(hash, entry.Time(GetTime()).FromTx(tx));
 451     BOOST_CHECK(!CheckFinalTx(tx, flags)); // Locktime fails
 452     BOOST_CHECK(TestSequenceLocks(tx, flags)); // Sequence locks pass
 453     BOOST_CHECK(IsFinalTx(tx, chainActive.Tip()->nHeight + 2, chainActive.Tip()->GetMedianTimePast())); // Locktime passes on 2nd block
 454
 455     // absolute time locked
 456     tx.vin[0].prevout.hash = txFirst[3]->GetHash();
 457     tx.nLockTime = chainActive.Tip()->GetMedianTimePast();
 458     prevheights.resize(1);
 459     prevheights[0] = baseheight + 4;
 460     hash = tx.GetHash();
 461     mempool.addUnchecked(hash, entry.Time(GetTime()).FromTx(tx));
 462     BOOST_CHECK(!CheckFinalTx(tx, flags)); // Locktime fails
 463     BOOST_CHECK(TestSequenceLocks(tx, flags)); // Sequence locks pass
 464     BOOST_CHECK(IsFinalTx(tx, chainActive.Tip()->nHeight + 2, chainActive.Tip()->GetMedianTimePast() + 1)); // Locktime passes 1 second later
 465
 466     // mempool-dependent transactions (not added)
 467     tx.vin[0].prevout.hash = hash;
 468     prevheights[0] = chainActive.Tip()->nHeight + 1;
 469     tx.nLockTime = 0;
 470     tx.vin[0].nSequence = 0;
 471     BOOST_CHECK(CheckFinalTx(tx, flags)); // Locktime passes
 472     BOOST_CHECK(TestSequenceLocks(tx, flags)); // Sequence locks pass
 473     tx.vin[0].nSequence = 1;
 474     BOOST_CHECK(!TestSequenceLocks(tx, flags)); // Sequence locks fail
 475     tx.vin[0].nSequence = CTxIn::SEQUENCE_LOCKTIME_TYPE_FLAG;
 476     BOOST_CHECK(TestSequenceLocks(tx, flags)); // Sequence locks pass
 477     tx.vin[0].nSequence = CTxIn::SEQUENCE_LOCKTIME_TYPE_FLAG | 1;
 478     BOOST_CHECK(!TestSequenceLocks(tx, flags)); // Sequence locks fail
 479
 480     BOOST_CHECK(pblocktemplate = AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey));
 481
 482     // None of the of the absolute height/time locked tx should have made
 483     // it into the template because we still check IsFinalTx in CreateNewBlock,
 484     // but relative locked txs will if inconsistently added to mempool.
 485     // For now these will still generate a valid template until BIP68 soft fork
 486     BOOST_CHECK_EQUAL(pblocktemplate->block.vtx.size(), 3);
 487     // However if we advance height by 1 and time by 512, all of them should be mined
 488     for (int i = 0; i < CBlockIndex::nMedianTimeSpan; i++)
 489         chainActive.Tip()->GetAncestor(chainActive.Tip()->nHeight - i)->nTime += 512; //Trick the MedianTimePast
 490     chainActive.Tip()->nHeight++;
 491     SetMockTime(chainActive.Tip()->GetMedianTimePast() + 1);
 492
 493     BOOST_CHECK(pblocktemplate = AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey));
 494     BOOST_CHECK_EQUAL(pblocktemplate->block.vtx.size(), 5);
 495
 496     chainActive.Tip()->nHeight--;
 497     SetMockTime(0);
 498     mempool.clear();
 499
 500     TestPackageSelection(chainparams, scriptPubKey, txFirst);
 501
 502     fCheckpointsEnabled = true;
 503 }
 504
 505 BOOST_AUTO_TEST_SUITE_END()