diff options
Diffstat (limited to 'src/validation.cpp')
| -rw-r--r-- | src/validation.cpp | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/src/validation.cpp b/src/validation.cpp index d398ec7406..1d9d5ae753 100644 --- a/src/validation.cpp +++ b/src/validation.cpp @@ -951,7 +951,8 @@ bool MemPoolAccept::PreChecks(ATMPArgs& args, Workspace& ws) // If the new transaction is relatively small (up to 40k weight) // and has at most one ancestor (ie ancestor limit of 2, including // the new transaction), allow it if its parent has exactly the - // descendant limit descendants. + // descendant limit descendants. The transaction also cannot be v3, + // as its topology restrictions do not allow a second child. // // This allows protocols which rely on distrusting counterparties // being able to broadcast descendants of an unconfirmed transaction @@ -965,7 +966,7 @@ bool MemPoolAccept::PreChecks(ATMPArgs& args, Workspace& ws) .descendant_size_vbytes = maybe_rbf_limits.descendant_size_vbytes + EXTRA_DESCENDANT_TX_SIZE_LIMIT, }; const auto error_message{util::ErrorString(ancestors).original}; - if (ws.m_vsize > EXTRA_DESCENDANT_TX_SIZE_LIMIT) { + if (ws.m_vsize > EXTRA_DESCENDANT_TX_SIZE_LIMIT || ws.m_ptx->nVersion == 3) { return state.Invalid(TxValidationResult::TX_MEMPOOL_POLICY, "too-long-mempool-chain", error_message); } if (auto ancestors_retry{m_pool.CalculateMemPoolAncestors(*entry, cpfp_carve_out_limits)}) { |