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p2p: Start downloading historical blocks from common ancestor

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Otherwise, if the background tip is not an ancestor of the snapshot, blocks in between that ancestor up to the height of the background tip will never be requested.

Co-authored-by: Martin Zumsande <mzumsande@gmail.com>
Co-authored-by: Alfonso Roman Zubeldia <19962151+alfonsoromanz@users.noreply.github.com>
This commit is contained in:
Martin Zumsande 2024-06-10 18:20:15 -04:00 • committed by Alfonso Roman Zubeldia
parent f47cd649e9
commit d35efe1efc
1 changed files with 4 additions and 1 deletions
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5
src/net_processing.cpp
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@ -6293,10 +6293,13 @@ bool PeerManagerImpl::SendMessages(CNode* pto)
// before the background chainstate to prioritize getting to network tip.
FindNextBlocksToDownload(*peer, get_inflight_budget(), vToDownload, staller);
if (m_chainman.BackgroundSyncInProgress() && !IsLimitedPeer(*peer)) {
// If the background tip is not an ancestor of the snapshot block,
// we need to start requesting blocks from their last common ancestor.
const CBlockIndex *from_tip = LastCommonAncestor(m_chainman.GetBackgroundSyncTip(), m_chainman.GetSnapshotBaseBlock());
TryDownloadingHistoricalBlocks(
*peer,
get_inflight_budget(),
vToDownload, m_chainman.GetBackgroundSyncTip(),
vToDownload, from_tip,
Assert(m_chainman.GetSnapshotBaseBlock()));
}
for (const CBlockIndex *pindex : vToDownload) {