diff options
Diffstat (limited to 'src/blockencodings.cpp')
| -rw-r--r-- | src/blockencodings.cpp | 32 |
1 files changed, 31 insertions, 1 deletions
diff --git a/src/blockencodings.cpp b/src/blockencodings.cpp index 72fe17bdc7..43b4cb9b86 100644 --- a/src/blockencodings.cpp +++ b/src/blockencodings.cpp @@ -47,7 +47,7 @@ uint64_t CBlockHeaderAndShortTxIDs::GetShortID(const uint256& txhash) const { -ReadStatus PartiallyDownloadedBlock::InitData(const CBlockHeaderAndShortTxIDs& cmpctblock) { +ReadStatus PartiallyDownloadedBlock::InitData(const CBlockHeaderAndShortTxIDs& cmpctblock, std::vector<std::pair<uint256, CTransactionRef>>& extra_txn) { if (cmpctblock.header.IsNull() || (cmpctblock.shorttxids.empty() && cmpctblock.prefilledtxn.empty())) return READ_STATUS_INVALID; if (cmpctblock.shorttxids.size() + cmpctblock.prefilledtxn.size() > MAX_BLOCK_BASE_SIZE / MIN_TRANSACTION_BASE_SIZE) @@ -104,6 +104,7 @@ ReadStatus PartiallyDownloadedBlock::InitData(const CBlockHeaderAndShortTxIDs& c return READ_STATUS_FAILED; // Short ID collision std::vector<bool> have_txn(txn_available.size()); + { LOCK(pool->cs); const std::vector<std::pair<uint256, CTxMemPool::txiter> >& vTxHashes = pool->vTxHashes; for (size_t i = 0; i < vTxHashes.size(); i++) { @@ -130,6 +131,35 @@ ReadStatus PartiallyDownloadedBlock::InitData(const CBlockHeaderAndShortTxIDs& c if (mempool_count == shorttxids.size()) break; } + } + + for (size_t i = 0; i < extra_txn.size(); i++) { + uint64_t shortid = cmpctblock.GetShortID(extra_txn[i].first); + std::unordered_map<uint64_t, uint16_t>::iterator idit = shorttxids.find(shortid); + if (idit != shorttxids.end()) { + if (!have_txn[idit->second]) { + txn_available[idit->second] = extra_txn[i].second; + have_txn[idit->second] = true; + mempool_count++; + } else { + // If we find two mempool txn that match the short id, just request it. + // This should be rare enough that the extra bandwidth doesn't matter, + // but eating a round-trip due to FillBlock failure would be annoying + // Note that we dont want duplication between extra_txn and mempool to + // trigger this case, so we compare witness hashes first + if (txn_available[idit->second] && + txn_available[idit->second]->GetWitnessHash() != extra_txn[i].second->GetWitnessHash()) { + txn_available[idit->second].reset(); + mempool_count--; + } + } + } + // Though ideally we'd continue scanning for the two-txn-match-shortid case, + // the performance win of an early exit here is too good to pass up and worth + // the extra risk. + if (mempool_count == shorttxids.size()) + break; + } LogPrint("cmpctblock", "Initialized PartiallyDownloadedBlock for block %s using a cmpctblock of size %lu\n", cmpctblock.header.GetHash().ToString(), GetSerializeSize(cmpctblock, SER_NETWORK, PROTOCOL_VERSION)); |