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Test RandomX seed selection across forks

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Capri 2026-09-16 16:40:52 +00:00
commit 146306fe64
Signed by: VextaProject
SSH key fingerprint: SHA256:739BZv8LvIDY2tR7lXLy/IQ6MaGTQtYcG9GNvCjmpVM
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61
src/test/pow_tests.cpp
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@ -973,6 +973,67 @@ BOOST_AUTO_TEST_CASE(RandomX_seed_height_test)
}
BOOST_AUTO_TEST_CASE(RandomX_seed_branch_test)
{
auto chainParams = CreateChainParams(*m_node.args, CBaseChainParams::REGTEST);
auto consensus = chainParams->GetConsensus();
consensus.randomXSeedEpochLength = 64;
consensus.randomXSeedLag = 8;
// For a candidate block at height 128, the RandomX seed must come
// from height 120 on the candidate's own branch.
BOOST_REQUIRE_EQUAL(GetRandomXSeedHeight(128, consensus), 120);
std::vector<CBlockIndex> mainBlocks(128);
std::vector<uint256> mainHashes(128);
for (int height = 0; height < 128; ++height) {
mainBlocks[height].pprev =
height ? &mainBlocks[height - 1] : nullptr;
mainBlocks[height].nHeight = height;
mainHashes[height] = GetRandHash();
mainBlocks[height].phashBlock = &mainHashes[height];
mainBlocks[height].BuildSkip();
}
// Fork after height 100, so height 120 differs between branches.
static constexpr int forkHeight = 100;
std::vector<CBlockIndex> sideBlocks(27);
std::vector<uint256> sideHashes(27);
for (int i = 0; i < 27; ++i) {
const int height = forkHeight + 1 + i;
sideBlocks[i].pprev =
i ? &sideBlocks[i - 1] : &mainBlocks[forkHeight];
sideBlocks[i].nHeight = height;
sideHashes[i] = GetRandHash();
sideBlocks[i].phashBlock = &sideHashes[i];
sideBlocks[i].BuildSkip();
}
uint256 mainSeed;
uint256 sideSeed;
BOOST_REQUIRE(GetRandomXSeed(
&mainBlocks[127], 128, consensus, mainSeed));
BOOST_REQUIRE(GetRandomXSeed(
&sideBlocks.back(), 128, consensus, sideSeed));
BOOST_CHECK_EQUAL(mainSeed, mainHashes[120]);
const int sideSeedIndex = 120 - (forkHeight + 1);
BOOST_REQUIRE(sideSeedIndex >= 0);
BOOST_REQUIRE(sideSeedIndex < static_cast<int>(sideHashes.size()));
BOOST_CHECK_EQUAL(sideSeed, sideHashes[sideSeedIndex]);
BOOST_CHECK(mainSeed != sideSeed);
}
BOOST_AUTO_TEST_CASE(RandomX_header_hash_vector_test)
{
CBlockHeader header;