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Log reason for non-standard transaction rejection

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This commit is contained in:
Jeff Garzik
2013-06-23 02:05:25 -04:00
parent b4a8a326c0
commit 980bfe6ef8
4 changed files with 38 additions and 18 deletions
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37
src/main.cpp
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@@ -457,38 +457,53 @@ unsigned int LimitOrphanTxSize(unsigned int nMaxOrphans)
bool IsStandardTx(const CTransaction& tx)
bool IsStandardTx(const CTransaction& tx, string& reason)
{
if (tx.nVersion > CTransaction::CURRENT_VERSION)
if (tx.nVersion > CTransaction::CURRENT_VERSION) {
reason = "version";
return false;
}
if (!IsFinalTx(tx))
if (!IsFinalTx(tx)) {
reason = "non-final";
return false;
}
// Extremely large transactions with lots of inputs can cost the network
// almost as much to process as they cost the sender in fees, because
// computing signature hashes is O(ninputs*txsize). Limiting transactions
// to MAX_STANDARD_TX_SIZE mitigates CPU exhaustion attacks.
unsigned int sz = tx.GetSerializeSize(SER_NETWORK, CTransaction::CURRENT_VERSION);
if (sz >= MAX_STANDARD_TX_SIZE)
if (sz >= MAX_STANDARD_TX_SIZE) {
reason = "tx-size";
return false;
}
BOOST_FOREACH(const CTxIn& txin, tx.vin)
{
// Biggest 'standard' txin is a 3-signature 3-of-3 CHECKMULTISIG
// pay-to-script-hash, which is 3 ~80-byte signatures, 3
// ~65-byte public keys, plus a few script ops.
if (txin.scriptSig.size() > 500)
if (txin.scriptSig.size() > 500) {
reason = "scriptsig-size";
return false;
if (!txin.scriptSig.IsPushOnly())
}
if (!txin.scriptSig.IsPushOnly()) {
reason = "scriptsig-not-pushonly";
return false;
}
}
BOOST_FOREACH(const CTxOut& txout, tx.vout) {
if (!::IsStandard(txout.scriptPubKey))
if (!::IsStandard(txout.scriptPubKey)) {
reason = "scriptpubkey";
return false;
if (txout.IsDust(CTransaction::nMinRelayTxFee))
}
if (txout.IsDust(CTransaction::nMinRelayTxFee)) {
reason = "dust";
return false;
}
}
return true;
}
@@ -782,8 +797,10 @@ bool CTxMemPool::accept(CValidationState &state, CTransaction &tx, bool fLimitFr
return error("CTxMemPool::accept() : not accepting nLockTime beyond 2038 yet");
// Rather not work on nonstandard transactions (unless -testnet)
if (!TestNet() && !IsStandardTx(tx))
return error("CTxMemPool::accept() : nonstandard transaction type");
string reason;
if (!TestNet() && !IsStandardTx(tx, reason))
return error("CTxMemPool::accept() : nonstandard transaction: %s",
reason.c_str());
// is it already in the memory pool?
uint256 hash = tx.GetHash();