// Copyright (c) 2015-2020 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 #include #include #include #include BOOST_FIXTURE_TEST_SUITE(pow_tests, BasicTestingSetup) /* Test calculation of next difficulty target with DGW */ BOOST_AUTO_TEST_CASE(get_next_work) { const auto chainParams = CreateChainParams(*m_node.args, CBaseChainParams::MAIN); // build the chain of 24 blocks CBlockIndex blockIndexLast; blockIndexLast.nHeight = 123456; blockIndexLast.nTime = 1408732489; blockIndexLast.nBits = 0x1b1418d4; CBlockIndex blockIndexPrev1 = CBlockIndex(); blockIndexPrev1.nTime = 1408732257; // Block #123455 blockIndexPrev1.nBits = 0x1b13b83f; blockIndexLast.pprev = &blockIndexPrev1; CBlockIndex blockIndexPrev2 = CBlockIndex(); blockIndexPrev2.nTime = 1408732229; // Block #123454 blockIndexPrev2.nBits = 0x1b10460b; blockIndexPrev1.pprev = &blockIndexPrev2; CBlockIndex blockIndexPrev3 = CBlockIndex(); blockIndexPrev3.nTime = 1408731256; // Block #123453 blockIndexPrev3.nBits = 0x1b113ff1; blockIndexPrev2.pprev = &blockIndexPrev3; CBlockIndex blockIndexPrev4 = CBlockIndex(); blockIndexPrev4.nTime = 1408731242; // Block #123452 blockIndexPrev4.nBits = 0x1b0fed89; blockIndexPrev3.pprev = &blockIndexPrev4; CBlockIndex blockIndexPrev5 = CBlockIndex(); blockIndexPrev5.nTime = 1408730914; // Block #123451 blockIndexPrev5.nBits = 0x1b10b864; blockIndexPrev4.pprev = &blockIndexPrev5; CBlockIndex blockIndexPrev6 = CBlockIndex(); blockIndexPrev6.nTime = 1408730862; // Block #123450 blockIndexPrev6.nBits = 0x1b0dd168; blockIndexPrev5.pprev = &blockIndexPrev6; CBlockIndex blockIndexPrev7 = CBlockIndex(); blockIndexPrev7.nTime = 1408730179; // Block #123449 blockIndexPrev7.nBits = 0x1b0c03d6; blockIndexPrev6.pprev = &blockIndexPrev7; CBlockIndex blockIndexPrev8 = CBlockIndex(); blockIndexPrev8.nTime = 1408729678; // Block #123448 blockIndexPrev8.nBits = 0x1b0c9ab8; blockIndexPrev7.pprev = &blockIndexPrev8; CBlockIndex blockIndexPrev9 = CBlockIndex(); blockIndexPrev9.nTime = 1408729647; // Block #123447 blockIndexPrev9.nBits = 0x1b0dfaff; blockIndexPrev8.pprev = &blockIndexPrev9; CBlockIndex blockIndexPrev10 = CBlockIndex(); blockIndexPrev10.nTime = 1408729587; // Block #123446 blockIndexPrev10.nBits = 0x1b10e878; blockIndexPrev9.pprev = &blockIndexPrev10; CBlockIndex blockIndexPrev11 = CBlockIndex(); blockIndexPrev11.nTime = 1408729576; // Block #123445 blockIndexPrev11.nBits = 0x1b1063d0; blockIndexPrev10.pprev = &blockIndexPrev11; CBlockIndex blockIndexPrev12 = CBlockIndex(); blockIndexPrev12.nTime = 1408729474; // Block #123444 blockIndexPrev12.nBits = 0x1b104297; blockIndexPrev11.pprev = &blockIndexPrev12; CBlockIndex blockIndexPrev13 = CBlockIndex(); blockIndexPrev13.nTime = 1408729305; // Block #123443 blockIndexPrev13.nBits = 0x1b107556; blockIndexPrev12.pprev = &blockIndexPrev13; CBlockIndex blockIndexPrev14 = CBlockIndex(); blockIndexPrev14.nTime = 1408729179; // Block #123442 blockIndexPrev14.nBits = 0x1b110764; blockIndexPrev13.pprev = &blockIndexPrev14; CBlockIndex blockIndexPrev15 = CBlockIndex(); blockIndexPrev15.nTime = 1408729116; // Block #123441 blockIndexPrev15.nBits = 0x1b1141bf; blockIndexPrev14.pprev = &blockIndexPrev15; CBlockIndex blockIndexPrev16 = CBlockIndex(); blockIndexPrev16.nTime = 1408728950; // Block #123440 blockIndexPrev16.nBits = 0x1b1123f9; blockIndexPrev15.pprev = &blockIndexPrev16; CBlockIndex blockIndexPrev17 = CBlockIndex(); blockIndexPrev17.nTime = 1408728756; // Block #123439 blockIndexPrev17.nBits = 0x1b118d9c; blockIndexPrev16.pprev = &blockIndexPrev17; CBlockIndex blockIndexPrev18 = CBlockIndex(); blockIndexPrev18.nTime = 1408728744; // Block #123438 blockIndexPrev18.nBits = 0x1b11abac; blockIndexPrev17.pprev = &blockIndexPrev18; CBlockIndex blockIndexPrev19 = CBlockIndex(); blockIndexPrev19.nTime = 1408728608; // Block #123437 blockIndexPrev19.nBits = 0x1b11951e; blockIndexPrev18.pprev = &blockIndexPrev19; CBlockIndex blockIndexPrev20 = CBlockIndex(); blockIndexPrev20.nTime = 1408728495; // Block #123436 blockIndexPrev20.nBits = 0x1b121cf3; blockIndexPrev19.pprev = &blockIndexPrev20; CBlockIndex blockIndexPrev21 = CBlockIndex(); blockIndexPrev21.nTime = 1408728479; // Block #123435 blockIndexPrev21.nBits = 0x1b11a33c; blockIndexPrev20.pprev = &blockIndexPrev21; CBlockIndex blockIndexPrev22 = CBlockIndex(); blockIndexPrev22.nTime = 1408728332; // Block #123434 blockIndexPrev22.nBits = 0x1b10e09e; blockIndexPrev21.pprev = &blockIndexPrev22; CBlockIndex blockIndexPrev23 = CBlockIndex(); blockIndexPrev23.nTime = 1408728124; // Block #123433 blockIndexPrev23.nBits = 0x1b104be1; blockIndexPrev22.pprev = &blockIndexPrev23; CBlockHeader blockHeader; blockHeader.nTime = 1408732505; // Block #123457 BOOST_CHECK_EQUAL(GetNextWorkRequired(&blockIndexLast, &blockHeader, chainParams->GetConsensus()), 0x1b1441deU); // Block #123457 has 0x1b1441de // test special rules for slow blocks on devnet/testnet gArgs.SoftSetBoolArg("-devnet", true); const auto chainParamsDev = CreateChainParams(*m_node.args, CBaseChainParams::DEVNET); gArgs.ForceRemoveArg("devnet"); // make sure normal rules apply blockHeader.nTime = 1408732505; // Block #123457 BOOST_CHECK_EQUAL(GetNextWorkRequired(&blockIndexLast, &blockHeader, chainParamsDev->GetConsensus()), 0x1b1441deU); // Block #123457 has 0x1b1441de // 10x higher target blockHeader.nTime = 1408733090; // Block #123457 (10m+1sec) BOOST_CHECK_EQUAL(GetNextWorkRequired(&blockIndexLast, &blockHeader, chainParamsDev->GetConsensus()), 0x1c00c8f8U); // Block #123457 has 0x1c00c8f8 blockHeader.nTime = 1408733689; // Block #123457 (20m) BOOST_CHECK_EQUAL(GetNextWorkRequired(&blockIndexLast, &blockHeader, chainParamsDev->GetConsensus()), 0x1c00c8f8U); // Block #123457 has 0x1c00c8f8 // lowest diff possible blockHeader.nTime = 1408739690; // Block #123457 (2h+1sec) BOOST_CHECK_EQUAL(GetNextWorkRequired(&blockIndexLast, &blockHeader, chainParamsDev->GetConsensus()), 0x207fffffU); // Block #123457 has 0x207fffff blockHeader.nTime = 1408743289; // Block #123457 (3h) BOOST_CHECK_EQUAL(GetNextWorkRequired(&blockIndexLast, &blockHeader, chainParamsDev->GetConsensus()), 0x207fffffU); // Block #123457 has 0x207fffff } /* Test the constraint on the upper bound for next work */ // BOOST_AUTO_TEST_CASE(get_next_work_pow_limit) // { // const auto chainParams = CreateChainParams(*m_node.args, CBaseChainParams::MAIN); // int64_t nLastRetargetTime = 1231006505; // Block #0 // CBlockIndex pindexLast; // pindexLast.nHeight = 2015; // pindexLast.nTime = 1233061996; // Block #2015 // pindexLast.nBits = 0x1d00ffff; // BOOST_CHECK_EQUAL(CalculateNextWorkRequired(&pindexLast, nLastRetargetTime, chainParams->GetConsensus()), 0x1d00ffffU); // } /* Test the constraint on the lower bound for actual time taken */ // BOOST_AUTO_TEST_CASE(get_next_work_lower_limit_actual) // { // const auto chainParams = CreateChainParams(*m_node.args, CBaseChainParams::MAIN); // int64_t nLastRetargetTime = 1279008237; // Block #66528 // CBlockIndex pindexLast; // pindexLast.nHeight = 68543; // pindexLast.nTime = 1279297671; // Block #68543 // pindexLast.nBits = 0x1c05a3f4; // BOOST_CHECK_EQUAL(CalculateNextWorkRequired(&pindexLast, nLastRetargetTime, chainParams->GetConsensus()), 0x1c0168fdU); // } /* Test the constraint on the upper bound for actual time taken */ // BOOST_AUTO_TEST_CASE(get_next_work_upper_limit_actual) // { // const auto chainParams = CreateChainParams(*m_node.args, CBaseChainParams::MAIN); // int64_t nLastRetargetTime = 1263163443; // NOTE: Not an actual block time // CBlockIndex pindexLast; // pindexLast.nHeight = 46367; // pindexLast.nTime = 1269211443; // Block #46367 // pindexLast.nBits = 0x1c387f6f; // BOOST_CHECK_EQUAL(CalculateNextWorkRequired(&pindexLast, nLastRetargetTime, chainParams->GetConsensus()), 0x1d00e1fdU); // } BOOST_AUTO_TEST_CASE(CheckProofOfWork_test_negative_target) { const auto consensus = CreateChainParams(*m_node.args, CBaseChainParams::MAIN)->GetConsensus(); uint256 hash; unsigned int nBits; nBits = UintToArith256(consensus.powLimit).GetCompact(true); hash.SetHex("0x1"); BOOST_CHECK(!CheckProofOfWork(hash, nBits, consensus)); } BOOST_AUTO_TEST_CASE(CheckProofOfWork_test_overflow_target) { const auto consensus = CreateChainParams(*m_node.args, CBaseChainParams::MAIN)->GetConsensus(); uint256 hash; unsigned int nBits = ~0x00800000; hash.SetHex("0x1"); BOOST_CHECK(!CheckProofOfWork(hash, nBits, consensus)); } BOOST_AUTO_TEST_CASE(CheckProofOfWork_test_too_easy_target) { const auto consensus = CreateChainParams(*m_node.args, CBaseChainParams::MAIN)->GetConsensus(); uint256 hash; unsigned int nBits; arith_uint256 nBits_arith = UintToArith256(consensus.powLimit); nBits_arith *= 2; nBits = nBits_arith.GetCompact(); hash.SetHex("0x1"); BOOST_CHECK(!CheckProofOfWork(hash, nBits, consensus)); } BOOST_AUTO_TEST_CASE(CheckProofOfWork_test_biger_hash_than_target) { const auto consensus = CreateChainParams(*m_node.args, CBaseChainParams::MAIN)->GetConsensus(); uint256 hash; unsigned int nBits; arith_uint256 hash_arith = UintToArith256(consensus.powLimit); nBits = hash_arith.GetCompact(); hash_arith *= 2; // hash > nBits hash = ArithToUint256(hash_arith); BOOST_CHECK(!CheckProofOfWork(hash, nBits, consensus)); } BOOST_AUTO_TEST_CASE(CheckProofOfWork_test_zero_target) { const auto consensus = CreateChainParams(*m_node.args, CBaseChainParams::MAIN)->GetConsensus(); uint256 hash; unsigned int nBits; arith_uint256 hash_arith{0}; nBits = hash_arith.GetCompact(); hash = ArithToUint256(hash_arith); BOOST_CHECK(!CheckProofOfWork(hash, nBits, consensus)); } BOOST_AUTO_TEST_CASE(GetBlockProofEquivalentTime_test) { const auto chainParams = CreateChainParams(*m_node.args, CBaseChainParams::MAIN); std::vector blocks(10000); for (int i = 0; i < 10000; i++) { blocks[i].pprev = i ? &blocks[i - 1] : nullptr; blocks[i].nHeight = i; blocks[i].nTime = 1269211443 + i * chainParams->GetConsensus().nPowTargetSpacing; blocks[i].nBits = 0x207fffff; /* target 0x7fffff000... */ blocks[i].nChainWork = i ? blocks[i - 1].nChainWork + GetBlockProof(blocks[i - 1]) : arith_uint256(0); } for (int j = 0; j < 1000; j++) { CBlockIndex *p1 = &blocks[InsecureRandRange(10000)]; CBlockIndex *p2 = &blocks[InsecureRandRange(10000)]; CBlockIndex *p3 = &blocks[InsecureRandRange(10000)]; int64_t tdiff = GetBlockProofEquivalentTime(*p1, *p2, *p3, chainParams->GetConsensus()); BOOST_CHECK_EQUAL(tdiff, p1->GetBlockTime() - p2->GetBlockTime()); } } BOOST_AUTO_TEST_SUITE_END()