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miner: Pass in chainman to RegenerateCommitments

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Pass in chainman instead of prev_block so that we can enforce the
block.hashPrevBlock refers to prev_block invariant in the function
itself.

We should probably rethink BlockAssembler's API and somehow include
commitment regeneration functionality in there. Something like a variant
of CreateNewBlock that takes in a std::vector<TxRef> and return a CBlock
instead of CBlockTemplate. That could avoid reaching for
LookupBlockIndex at all.
This commit is contained in:
Carl Dong
2021-04-23 15:24:47 -04:00
parent 9ecade1425
commit e6b4aa6eb5
4 changed files with 13 additions and 7 deletions
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12
src/miner.cpp
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@@ -39,13 +39,21 @@ int64_t UpdateTime(CBlockHeader* pblock, const Consensus::Params& consensusParam
return nNewTime - nOldTime;
}
void RegenerateCommitments(CBlock& block, CBlockIndex* prev_block)
void RegenerateCommitments(CBlock& block, ChainstateManager& chainman)
{
CMutableTransaction tx{*block.vtx.at(0)};
tx.vout.erase(tx.vout.begin() + GetWitnessCommitmentIndex(block));
block.vtx.at(0) = MakeTransactionRef(tx);
WITH_LOCK(::cs_main, assert(g_chainman.m_blockman.LookupBlockIndex(block.hashPrevBlock) == prev_block));
CBlockIndex* prev_block;
{
// TODO: Temporary scope to check correctness of refactored code.
// Should be removed manually after merge of
// https://github.com/bitcoin/bitcoin/pull/20158
LOCK(::cs_main);
assert(std::addressof(g_chainman.m_blockman) == std::addressof(chainman.m_blockman));
prev_block = chainman.m_blockman.LookupBlockIndex(block.hashPrevBlock);
}
GenerateCoinbaseCommitment(block, prev_block, Params().GetConsensus());
block.hashMerkleRoot = BlockMerkleRoot(block);