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Make 100KB transaction size limit a consensus rule, rather than a standard rule.

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This commit is contained in:
Sean Bowe
2016-10-08 00:00:23 -06:00
parent f2c99399b8
commit 74f15a73a1
6 changed files with 28 additions and 24 deletions
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13
src/main.cpp
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@@ -644,16 +644,6 @@ bool IsStandardTx(const CTransaction& tx, string& reason)
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) {
reason = "tx-size";
return false;
}
BOOST_FOREACH(const CTxIn& txin, tx.vin)
{
// Biggest 'standard' txin is a 15-of-15 P2SH multisig with compressed
@@ -871,7 +861,8 @@ bool CheckTransactionWithoutProofVerification(const CTransaction& tx, CValidatio
REJECT_INVALID, "bad-txns-vout-empty");
// Size limits
if (::GetSerializeSize(tx, SER_NETWORK, PROTOCOL_VERSION) > MAX_BLOCK_SIZE)
BOOST_STATIC_ASSERT(MAX_BLOCK_SIZE > MAX_TX_SIZE); // sanity
if (::GetSerializeSize(tx, SER_NETWORK, PROTOCOL_VERSION) > MAX_TX_SIZE)
return state.DoS(100, error("CheckTransaction(): size limits failed"),
REJECT_INVALID, "bad-txns-oversize");