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dgb: walk-forward getheaders — embedded sync past 2000-header cap #257

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Merged
frstrtr merged 1 commit into from
Jun 20, 2026
Merged

dgb: walk-forward getheaders — embedded sync past 2000-header cap #257

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16 changes: 16 additions & 0 deletions src/impl/dgb/coin/p2p_node.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -706,6 +706,22 @@ class NodeP2P : public core::ICommunicator, public core::INetwork, public core::
<< bhash.GetHex().substr(0, 16) << "...";
}
}
// Walk-forward sync: a full (non-announcement) batch means the
// peer likely has more headers past our new tip. Re-issue
// getheaders anchored on the last header received so initial sync
// advances past the 2000-header-per-message cap until the peer
// returns a short batch (caught up -> empty -> loop terminates).
// Producer-transport only, non-consensus.
else if (vheaders.size() > 3 && m_peer) {
auto packed_tip = pack(vheaders.back());
auto tip_hash = Hash(packed_tip.get_span());
auto getheaders_msg = message_getheaders::make_raw(
1, {tip_hash}, uint256());
m_peer->write(getheaders_msg);
LOG_INFO << "[" << m_chain_label << "] Walk-forward getheaders from "
<< tip_hash.GetHex().substr(0, 16) << "..."
<< " (batch=" << vheaders.size() << ")";
}
}
}

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