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CheckBlock rule until 15-May for 10,000 BDB lock compatibility

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Gavin Andresen
2013-03-15 13:10:34 -04:00
parent 1a9ee5da32
commit 8c222dca4f
2 changed files with 85 additions and 0 deletions
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19
src/main.cpp
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@@ -2056,6 +2056,25 @@ bool CBlock::CheckBlock(CValidationState &state, bool fCheckPOW, bool fCheckMerk
if (vtx.empty() || vtx.size() > MAX_BLOCK_SIZE || ::GetSerializeSize(*this, SER_NETWORK, PROTOCOL_VERSION) > MAX_BLOCK_SIZE)
return state.DoS(100, error("CheckBlock() : size limits failed"));
// Special short-term limits to avoid 10,000 BDB lock limit:
if (GetBlockTime() > 1363039171 && // 11 March 2013, timestamp of block before the big fork
GetBlockTime() < 1368576000) // 15 May 2013 00:00:00
{
// Rule is: #unique txids referenced <= 4,500
// ... to prevent 10,000 BDB lock exhaustion on old clients
set<uint256> setTxIn;
for (size_t i = 0; i < vtx.size(); i++)
{
setTxIn.insert(vtx[i].GetHash());
if (i == 0) continue; // skip coinbase txin
BOOST_FOREACH(const CTxIn& txin, vtx[i].vin)
setTxIn.insert(txin.prevout.hash);
}
size_t nTxids = setTxIn.size();
if (nTxids > 4500)
return error("CheckBlock() : 15 May maxlocks violation");
}
// Check proof of work matches claimed amount
if (fCheckPOW && !CheckProofOfWork(GetHash(), nBits))
return state.DoS(50, error("CheckBlock() : proof of work failed"));