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Clean up banning levels

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Compared with previous bans, the following changes are made:
 * Txn with empty vin/vout or null prevouts move from 10 DoS
   points to 100.
 * Loose transactions with a dependency loop now result in a ban
   instead of 10 DoS points.
 * Many pre-segwit soft-fork errors now result in a ban.
   Note: Transactions that violate soft-fork script flags since P2SH do not generally
   result in a ban. Also, banning behavior for invalid blocks is dependent on
   whether the node is validating with multiple script check threads, due to a long-
   standing bug. That inconsistency is still present after this commit.
 * Proof of work failure moves from 50 DoS points to a ban.
 * Blocks with timestamps under MTP now result in a ban, blocks
   too far in the future continue to *not* result in a ban.
 * Inclusion of non-final transactions in a block now results in a
   ban instead of 10 DoS points.

Co-authored-by: Anthony Towns <aj@erisian.com.au>
This commit is contained in:
Matt Corallo
2019-01-23 15:14:16 -05:00
committed by Suhas Daftuar
parent b8b4c80146
commit 7b999103e2
5 changed files with 17 additions and 17 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
src/consensus/tx_check.cpp
View File

@@ -11,9 +11,9 @@ bool CheckTransaction(const CTransaction& tx, CValidationState &state, bool fChe
{
// Basic checks that don't depend on any context
if (tx.vin.empty())
return state.DoS(10, false, REJECT_INVALID, "bad-txns-vin-empty");
return state.DoS(100, false, REJECT_INVALID, "bad-txns-vin-empty");
if (tx.vout.empty())
return state.DoS(10, false, REJECT_INVALID, "bad-txns-vout-empty");
return state.DoS(100, false, REJECT_INVALID, "bad-txns-vout-empty");
// Size limits (this doesn't take the witness into account, as that hasn't been checked for malleability)
if (::GetSerializeSize(tx, PROTOCOL_VERSION | SERIALIZE_TRANSACTION_NO_WITNESS) * WITNESS_SCALE_FACTOR > MAX_BLOCK_WEIGHT)
return state.DoS(100, false, REJECT_INVALID, "bad-txns-oversize");
@@ -50,7 +50,7 @@ bool CheckTransaction(const CTransaction& tx, CValidationState &state, bool fChe
{
for (const auto& txin : tx.vin)
if (txin.prevout.IsNull())
return state.DoS(10, false, REJECT_INVALID, "bad-txns-prevout-null");
return state.DoS(100, false, REJECT_INVALID, "bad-txns-prevout-null");
}
return true;

4
src/consensus/tx_verify.cpp
View File

@@ -172,8 +172,8 @@ bool Consensus::CheckTxInputs(const CTransaction& tx, CValidationState& state, c
// If prev is coinbase, check that it's matured
if (coin.IsCoinBase() && nSpendHeight - coin.nHeight < COINBASE_MATURITY) {
return state.Invalid(false,
REJECT_INVALID, "bad-txns-premature-spend-of-coinbase",
return state.DoS(0, false,
REJECT_INVALID, "bad-txns-premature-spend-of-coinbase", false,
strprintf("tried to spend coinbase at depth %d", nSpendHeight - coin.nHeight));
}

10
src/validation.cpp
View File

@@ -760,7 +760,7 @@ static bool AcceptToMemoryPoolWorker(const CChainParams& chainparams, CTxMemPool
const uint256 &hashAncestor = ancestorIt->GetTx().GetHash();
if (setConflicts.count(hashAncestor))
{
return state.DoS(10, false,
return state.DoS(100, false,
REJECT_INVALID, "bad-txns-spends-conflicting-tx", false,
strprintf("%s spends conflicting transaction %s",
hash.ToString(),
@@ -3047,7 +3047,7 @@ static bool CheckBlockHeader(const CBlockHeader& block, CValidationState& state,
{
// Check proof of work matches claimed amount
if (fCheckPOW && !CheckProofOfWork(block.GetHash(), block.nBits, consensusParams))
return state.DoS(50, false, REJECT_INVALID, "high-hash", false, "proof of work failed");
return state.DoS(100, false, REJECT_INVALID, "high-hash", false, "proof of work failed");
return true;
}
@@ -3214,7 +3214,7 @@ static bool ContextualCheckBlockHeader(const CBlockHeader& block, CValidationSta
// Check timestamp against prev
if (block.GetBlockTime() <= pindexPrev->GetMedianTimePast())
return state.Invalid(false, REJECT_INVALID, "time-too-old", "block's timestamp is too early");
return state.DoS(100, false, REJECT_INVALID, "time-too-old", false, "block's timestamp is too early");
// Check timestamp
if (block.GetBlockTime() > nAdjustedTime + MAX_FUTURE_BLOCK_TIME)
@@ -3225,7 +3225,7 @@ static bool ContextualCheckBlockHeader(const CBlockHeader& block, CValidationSta
if((block.nVersion < 2 && nHeight >= consensusParams.BIP34Height) ||
(block.nVersion < 3 && nHeight >= consensusParams.BIP66Height) ||
(block.nVersion < 4 && nHeight >= consensusParams.BIP65Height))
return state.Invalid(false, REJECT_OBSOLETE, strprintf("bad-version(0x%08x)", block.nVersion),
return state.DoS(100, false, REJECT_OBSOLETE, strprintf("bad-version(0x%08x)", block.nVersion), false,
strprintf("rejected nVersion=0x%08x block", block.nVersion));
return true;
@@ -3255,7 +3255,7 @@ static bool ContextualCheckBlock(const CBlock& block, CValidationState& state, c
// Check that all transactions are finalized
for (const auto& tx : block.vtx) {
if (!IsFinalTx(*tx, nHeight, nLockTimeCutoff)) {
return state.DoS(10, false, REJECT_INVALID, "bad-txns-nonfinal", false, "non-final transaction");
return state.DoS(100, false, REJECT_INVALID, "bad-txns-nonfinal", false, "non-final transaction");
}
}