Add some blockencodings tests

1 files changed, 315 insertions, 0 deletions

diff --git a/src/test/blockencodings_tests.cpp b/src/test/blockencodings_tests.cpp
new file mode 100644
index 0000000000..3884bf3fe3
--- /dev/null
+++ b/src/test/blockencodings_tests.cpp
@@ -0,0 +1,315 @@
+// Copyright (c) 2011-2015 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#include "blockencodings.h"
+#include "consensus/merkle.h"
+#include "chainparams.h"
+#include "random.h"
+
+#include "test/test_bitcoin.h"
+
+#include <boost/test/unit_test.hpp>
+
+struct RegtestingSetup : public TestingSetup {
+    RegtestingSetup() : TestingSetup(CBaseChainParams::REGTEST) {}
+};
+
+BOOST_FIXTURE_TEST_SUITE(blockencodings_tests, RegtestingSetup)
+
+static CBlock BuildBlockTestCase() {
+    CBlock block;
+    CMutableTransaction tx;
+    tx.vin.resize(1);
+    tx.vin[0].scriptSig.resize(10);
+    tx.vout.resize(1);
+    tx.vout[0].nValue = 42;
+
+    block.vtx.resize(3);
+    block.vtx[0] = tx;
+    block.nVersion = 42;
+    block.hashPrevBlock = GetRandHash();
+    block.nBits = 0x207fffff;
+
+    tx.vin[0].prevout.hash = GetRandHash();
+    tx.vin[0].prevout.n = 0;
+    block.vtx[1] = tx;
+
+    tx.vin.resize(10);
+    for (size_t i = 0; i < tx.vin.size(); i++) {
+        tx.vin[i].prevout.hash = GetRandHash();
+        tx.vin[i].prevout.n = 0;
+    }
+    block.vtx[2] = tx;
+
+    bool mutated;
+    block.hashMerkleRoot = BlockMerkleRoot(block, &mutated);
+    assert(!mutated);
+    while (!CheckProofOfWork(block.GetHash(), block.nBits, Params().GetConsensus())) ++block.nNonce;
+    return block;
+}
+
+// Number of shared use_counts we expect for a tx we havent touched
+// == 2 (mempool + our copy from the GetSharedTx call)
+#define SHARED_TX_OFFSET 2
+
+BOOST_AUTO_TEST_CASE(SimpleRoundTripTest)
+{
+    CTxMemPool pool(CFeeRate(0));
+    TestMemPoolEntryHelper entry;
+    CBlock block(BuildBlockTestCase());
+
+    pool.addUnchecked(block.vtx[2].GetHash(), entry.FromTx(block.vtx[2]));
+    BOOST_CHECK_EQUAL(pool.mapTx.find(block.vtx[2].GetHash())->GetSharedTx().use_count(), SHARED_TX_OFFSET + 0);
+
+    // Do a simple ShortTxIDs RT
+    {
+        CBlockHeaderAndShortTxIDs shortIDs(block);
+
+        CDataStream stream(SER_NETWORK, PROTOCOL_VERSION);
+        stream << shortIDs;
+
+        CBlockHeaderAndShortTxIDs shortIDs2;
+        stream >> shortIDs2;
+
+        PartiallyDownloadedBlock partialBlock(&pool);
+        BOOST_CHECK(partialBlock.InitData(shortIDs2) == READ_STATUS_OK);
+        BOOST_CHECK( partialBlock.IsTxAvailable(0));
+        BOOST_CHECK(!partialBlock.IsTxAvailable(1));
+        BOOST_CHECK( partialBlock.IsTxAvailable(2));
+
+        BOOST_CHECK_EQUAL(pool.mapTx.find(block.vtx[2].GetHash())->GetSharedTx().use_count(), SHARED_TX_OFFSET + 1);
+
+        std::list<CTransaction> removed;
+        pool.removeRecursive(block.vtx[2], removed);
+        BOOST_CHECK_EQUAL(removed.size(), 1);
+
+        CBlock block2;
+        std::vector<CTransaction> vtx_missing;
+        BOOST_CHECK(partialBlock.FillBlock(block2, vtx_missing) == READ_STATUS_INVALID); // No transactions
+
+        vtx_missing.push_back(block.vtx[2]); // Wrong transaction
+        partialBlock.FillBlock(block2, vtx_missing); // Current implementation doesn't check txn here, but don't require that
+        bool mutated;
+        BOOST_CHECK(block.hashMerkleRoot != BlockMerkleRoot(block2, &mutated));
+
+        vtx_missing[0] = block.vtx[1];
+        CBlock block3;
+        BOOST_CHECK(partialBlock.FillBlock(block3, vtx_missing) == READ_STATUS_OK);
+        BOOST_CHECK_EQUAL(block.GetHash().ToString(), block3.GetHash().ToString());
+        BOOST_CHECK_EQUAL(block.hashMerkleRoot.ToString(), BlockMerkleRoot(block3, &mutated).ToString());
+        BOOST_CHECK(!mutated);
+    }
+}
+
+class TestHeaderAndShortIDs {
+    // Utility to encode custom CBlockHeaderAndShortTxIDs
+public:
+    CBlockHeader header;
+    uint64_t nonce;
+    std::vector<uint64_t> shorttxids;
+    std::vector<PrefilledTransaction> prefilledtxn;
+
+    TestHeaderAndShortIDs(const CBlockHeaderAndShortTxIDs& orig) {
+        CDataStream stream(SER_NETWORK, PROTOCOL_VERSION);
+        stream << orig;
+        stream >> *this;
+    }
+    TestHeaderAndShortIDs(const CBlock& block) :
+        TestHeaderAndShortIDs(CBlockHeaderAndShortTxIDs(block)) {}
+
+    uint64_t GetShortID(const uint256& txhash) const {
+        CDataStream stream(SER_NETWORK, PROTOCOL_VERSION);
+        stream << *this;
+        CBlockHeaderAndShortTxIDs base;
+        stream >> base;
+        return base.GetShortID(txhash);
+    }
+
+    ADD_SERIALIZE_METHODS;
+
+    template <typename Stream, typename Operation>
+    inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion) {
+        READWRITE(header);
+        READWRITE(nonce);
+        size_t shorttxids_size = shorttxids.size();
+        READWRITE(VARINT(shorttxids_size));
+        shorttxids.resize(shorttxids_size);
+        for (size_t i = 0; i < shorttxids.size(); i++) {
+            uint32_t lsb = shorttxids[i] & 0xffffffff;
+            uint16_t msb = (shorttxids[i] >> 32) & 0xffff;
+            READWRITE(lsb);
+            READWRITE(msb);
+            shorttxids[i] = (uint64_t(msb) << 32) | uint64_t(lsb);
+        }
+        READWRITE(prefilledtxn);
+    }
+};
+
+BOOST_AUTO_TEST_CASE(NonCoinbasePreforwardRTTest)
+{
+    CTxMemPool pool(CFeeRate(0));
+    TestMemPoolEntryHelper entry;
+    CBlock block(BuildBlockTestCase());
+
+    pool.addUnchecked(block.vtx[2].GetHash(), entry.FromTx(block.vtx[2]));
+    BOOST_CHECK_EQUAL(pool.mapTx.find(block.vtx[2].GetHash())->GetSharedTx().use_count(), SHARED_TX_OFFSET + 0);
+
+    // Test with pre-forwarding tx 1, but not coinbase
+    {
+        TestHeaderAndShortIDs shortIDs(block);
+        shortIDs.prefilledtxn.resize(1);
+        shortIDs.prefilledtxn[0] = {1, block.vtx[1]};
+        shortIDs.shorttxids.resize(2);
+        shortIDs.shorttxids[0] = shortIDs.GetShortID(block.vtx[0].GetHash());
+        shortIDs.shorttxids[1] = shortIDs.GetShortID(block.vtx[2].GetHash());
+
+        CDataStream stream(SER_NETWORK, PROTOCOL_VERSION);
+        stream << shortIDs;
+
+        CBlockHeaderAndShortTxIDs shortIDs2;
+        stream >> shortIDs2;
+
+        PartiallyDownloadedBlock partialBlock(&pool);
+        BOOST_CHECK(partialBlock.InitData(shortIDs2) == READ_STATUS_OK);
+        BOOST_CHECK(!partialBlock.IsTxAvailable(0));
+        BOOST_CHECK( partialBlock.IsTxAvailable(1));
+        BOOST_CHECK( partialBlock.IsTxAvailable(2));
+
+        BOOST_CHECK_EQUAL(pool.mapTx.find(block.vtx[2].GetHash())->GetSharedTx().use_count(), SHARED_TX_OFFSET + 1);
+
+        CBlock block2;
+        std::vector<CTransaction> vtx_missing;
+        BOOST_CHECK(partialBlock.FillBlock(block2, vtx_missing) == READ_STATUS_INVALID); // No transactions
+
+        vtx_missing.push_back(block.vtx[1]); // Wrong transaction
+        partialBlock.FillBlock(block2, vtx_missing); // Current implementation doesn't check txn here, but don't require that
+        bool mutated;
+        BOOST_CHECK(block.hashMerkleRoot != BlockMerkleRoot(block2, &mutated));
+
+        vtx_missing[0] = block.vtx[0];
+        CBlock block3;
+        BOOST_CHECK(partialBlock.FillBlock(block3, vtx_missing) == READ_STATUS_OK);
+        BOOST_CHECK_EQUAL(block.GetHash().ToString(), block3.GetHash().ToString());
+        BOOST_CHECK_EQUAL(block.hashMerkleRoot.ToString(), BlockMerkleRoot(block3, &mutated).ToString());
+        BOOST_CHECK(!mutated);
+
+        BOOST_CHECK_EQUAL(pool.mapTx.find(block.vtx[2].GetHash())->GetSharedTx().use_count(), SHARED_TX_OFFSET + 1);
+    }
+    BOOST_CHECK_EQUAL(pool.mapTx.find(block.vtx[2].GetHash())->GetSharedTx().use_count(), SHARED_TX_OFFSET + 0);
+}
+
+BOOST_AUTO_TEST_CASE(SufficientPreforwardRTTest)
+{
+    CTxMemPool pool(CFeeRate(0));
+    TestMemPoolEntryHelper entry;
+    CBlock block(BuildBlockTestCase());
+
+    pool.addUnchecked(block.vtx[1].GetHash(), entry.FromTx(block.vtx[1]));
+    BOOST_CHECK_EQUAL(pool.mapTx.find(block.vtx[1].GetHash())->GetSharedTx().use_count(), SHARED_TX_OFFSET + 0);
+
+    // Test with pre-forwarding coinbase + tx 2 with tx 1 in mempool
+    {
+        TestHeaderAndShortIDs shortIDs(block);
+        shortIDs.prefilledtxn.resize(2);
+        shortIDs.prefilledtxn[0] = {0, block.vtx[0]};
+        shortIDs.prefilledtxn[1] = {1, block.vtx[2]}; // id == 1 as it is 1 after index 1
+        shortIDs.shorttxids.resize(1);
+        shortIDs.shorttxids[0] = shortIDs.GetShortID(block.vtx[1].GetHash());
+
+        CDataStream stream(SER_NETWORK, PROTOCOL_VERSION);
+        stream << shortIDs;
+
+        CBlockHeaderAndShortTxIDs shortIDs2;
+        stream >> shortIDs2;
+
+        PartiallyDownloadedBlock partialBlock(&pool);
+        BOOST_CHECK(partialBlock.InitData(shortIDs2) == READ_STATUS_OK);
+        BOOST_CHECK( partialBlock.IsTxAvailable(0));
+        BOOST_CHECK( partialBlock.IsTxAvailable(1));
+        BOOST_CHECK( partialBlock.IsTxAvailable(2));
+
+        BOOST_CHECK_EQUAL(pool.mapTx.find(block.vtx[1].GetHash())->GetSharedTx().use_count(), SHARED_TX_OFFSET + 1);
+
+        CBlock block2;
+        std::vector<CTransaction> vtx_missing;
+        BOOST_CHECK(partialBlock.FillBlock(block2, vtx_missing) == READ_STATUS_OK);
+        BOOST_CHECK_EQUAL(block.GetHash().ToString(), block2.GetHash().ToString());
+        bool mutated;
+        BOOST_CHECK_EQUAL(block.hashMerkleRoot.ToString(), BlockMerkleRoot(block2, &mutated).ToString());
+        BOOST_CHECK(!mutated);
+
+        BOOST_CHECK_EQUAL(pool.mapTx.find(block.vtx[1].GetHash())->GetSharedTx().use_count(), SHARED_TX_OFFSET + 1);
+    }
+    BOOST_CHECK_EQUAL(pool.mapTx.find(block.vtx[1].GetHash())->GetSharedTx().use_count(), SHARED_TX_OFFSET + 0);
+}
+
+BOOST_AUTO_TEST_CASE(EmptyBlockRoundTripTest)
+{
+    CTxMemPool pool(CFeeRate(0));
+    CMutableTransaction coinbase;
+    coinbase.vin.resize(1);
+    coinbase.vin[0].scriptSig.resize(10);
+    coinbase.vout.resize(1);
+    coinbase.vout[0].nValue = 42;
+
+    CBlock block;
+    block.vtx.resize(1);
+    block.vtx[0] = coinbase;
+    block.nVersion = 42;
+    block.hashPrevBlock = GetRandHash();
+    block.nBits = 0x207fffff;
+
+    bool mutated;
+    block.hashMerkleRoot = BlockMerkleRoot(block, &mutated);
+    assert(!mutated);
+    while (!CheckProofOfWork(block.GetHash(), block.nBits, Params().GetConsensus())) ++block.nNonce;
+
+    // Test simple header round-trip with only coinbase
+    {
+        CBlockHeaderAndShortTxIDs shortIDs(block);
+
+        CDataStream stream(SER_NETWORK, PROTOCOL_VERSION);
+        stream << shortIDs;
+
+        CBlockHeaderAndShortTxIDs shortIDs2;
+        stream >> shortIDs2;
+
+        PartiallyDownloadedBlock partialBlock(&pool);
+        BOOST_CHECK(partialBlock.InitData(shortIDs2) == READ_STATUS_OK);
+        BOOST_CHECK(partialBlock.IsTxAvailable(0));
+
+        CBlock block2;
+        std::vector<CTransaction> vtx_missing;
+        BOOST_CHECK(partialBlock.FillBlock(block2, vtx_missing) == READ_STATUS_OK);
+        BOOST_CHECK_EQUAL(block.GetHash().ToString(), block2.GetHash().ToString());
+        bool mutated;
+        BOOST_CHECK_EQUAL(block.hashMerkleRoot.ToString(), BlockMerkleRoot(block2, &mutated).ToString());
+        BOOST_CHECK(!mutated);
+    }
+}
+
+BOOST_AUTO_TEST_CASE(TransactionsRequestSerializationTest) {
+    BlockTransactionsRequest req1;
+    req1.blockhash = GetRandHash();
+    req1.indexes.resize(4);
+    req1.indexes[0] = 0;
+    req1.indexes[1] = 1;
+    req1.indexes[2] = 3;
+    req1.indexes[3] = 4;
+
+    CDataStream stream(SER_NETWORK, PROTOCOL_VERSION);
+    stream << req1;
+
+    BlockTransactionsRequest req2;
+    stream >> req2;
+
+    BOOST_CHECK_EQUAL(req1.blockhash.ToString(), req2.blockhash.ToString());
+    BOOST_CHECK_EQUAL(req1.indexes.size(), req2.indexes.size());
+    BOOST_CHECK_EQUAL(req1.indexes[0], req2.indexes[0]);
+    BOOST_CHECK_EQUAL(req1.indexes[1], req2.indexes[1]);
+    BOOST_CHECK_EQUAL(req1.indexes[2], req2.indexes[2]);
+    BOOST_CHECK_EQUAL(req1.indexes[3], req2.indexes[3]);
+}
+
+BOOST_AUTO_TEST_SUITE_END()