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rpc: getblockfrompeer

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Co-authored-by: John Newbery <john@johnnewbery.com>
This commit is contained in:
Sjors Provoost
2021-05-13 18:51:47 +02:00
parent b884ababc2
commit dce8c4c381
8 changed files with 181 additions and 0 deletions
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36
src/net_processing.cpp
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@@ -312,6 +312,7 @@ public:
/** Implement PeerManager */
void StartScheduledTasks(CScheduler& scheduler) override;
void CheckForStaleTipAndEvictPeers() override;
bool FetchBlock(NodeId id, const uint256& hash, const CBlockIndex& index) override;
bool GetNodeStateStats(NodeId nodeid, CNodeStateStats& stats) const override;
bool IgnoresIncomingTxs() override { return m_ignore_incoming_txs; }
void SendPings() override;
@@ -1427,6 +1428,41 @@ bool PeerManagerImpl::BlockRequestAllowed(const CBlockIndex* pindex)
(GetBlockProofEquivalentTime(*pindexBestHeader, *pindex, *pindexBestHeader, m_chainparams.GetConsensus()) < STALE_RELAY_AGE_LIMIT);
}
bool PeerManagerImpl::FetchBlock(NodeId id, const uint256& hash, const CBlockIndex& index)
{
if (fImporting || fReindex) return false;
LOCK(cs_main);
// Ensure this peer exists and hasn't been disconnected
CNodeState* state = State(id);
if (state == nullptr) return false;
// Ignore pre-segwit peers
if (!state->fHaveWitness) return false;
// Mark block as in-flight unless it already is
if (!BlockRequested(id, index)) return false;
// Construct message to request the block
std::vector<CInv> invs{CInv(MSG_BLOCK | MSG_WITNESS_FLAG, hash)};
// Send block request message to the peer
bool success = m_connman.ForNode(id, [this, &invs](CNode* node) {
const CNetMsgMaker msgMaker(node->GetCommonVersion());
this->m_connman.PushMessage(node, msgMaker.Make(NetMsgType::GETDATA, invs));
return true;
});
if (success) {
LogPrint(BCLog::NET, "Requesting block %s from peer=%d\n",
hash.ToString(), id);
} else {
RemoveBlockRequest(hash);
LogPrint(BCLog::NET, "Failed to request block %s from peer=%d\n",
hash.ToString(), id);
}
return success;
}
std::unique_ptr<PeerManager> PeerManager::make(const CChainParams& chainparams, CConnman& connman, AddrMan& addrman,
BanMan* banman, ChainstateManager& chainman,
CTxMemPool& pool, bool ignore_incoming_txs)