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Use mempool's ancestor sort in transaction selection

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Transaction selection for mining tracks ancestor feerates that are
modified based on transactions that have already been selected.  This
commit de-duplicates the code so that the ancestor feerate sorting used
by the mempool can also be directly applied to the miner.
This commit is contained in:
Suhas Daftuar
2018-01-13 15:57:30 -05:00
parent 7abfa538b5
commit 0a22a52918
3 changed files with 12 additions and 19 deletions
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23
src/miner.h
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@@ -41,6 +41,12 @@ struct CTxMemPoolModifiedEntry {
nSigOpCostWithAncestors = entry->GetSigOpCostWithAncestors();
}
int64_t GetModifiedFee() const { return iter->GetModifiedFee(); }
uint64_t GetSizeWithAncestors() const { return nSizeWithAncestors; }
CAmount GetModFeesWithAncestors() const { return nModFeesWithAncestors; }
size_t GetTxSize() const { return iter->GetTxSize(); }
const CTransaction& GetTx() const { return iter->GetTx(); }
CTxMemPool::txiter iter;
uint64_t nSizeWithAncestors;
CAmount nModFeesWithAncestors;
@@ -67,21 +73,6 @@ struct modifiedentry_iter {
}
};
// This matches the calculation in CompareTxMemPoolEntryByAncestorFee,
// except operating on CTxMemPoolModifiedEntry.
// TODO: refactor to avoid duplication of this logic.
struct CompareModifiedEntry {
bool operator()(const CTxMemPoolModifiedEntry &a, const CTxMemPoolModifiedEntry &b) const
{
double f1 = (double)a.nModFeesWithAncestors * b.nSizeWithAncestors;
double f2 = (double)b.nModFeesWithAncestors * a.nSizeWithAncestors;
if (f1 == f2) {
return CTxMemPool::CompareIteratorByHash()(a.iter, b.iter);
}
return f1 > f2;
}
};
// A comparator that sorts transactions based on number of ancestors.
// This is sufficient to sort an ancestor package in an order that is valid
// to appear in a block.
@@ -106,7 +97,7 @@ typedef boost::multi_index_container<
// Reuse same tag from CTxMemPool's similar index
boost::multi_index::tag<ancestor_score>,
boost::multi_index::identity<CTxMemPoolModifiedEntry>,
CompareModifiedEntry
CompareTxMemPoolEntryByAncestorFee
>
>
> indexed_modified_transaction_set;