diff options
Diffstat (limited to 'src/net_processing.cpp')
| -rw-r--r-- | src/net_processing.cpp | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/src/net_processing.cpp b/src/net_processing.cpp index 07c12938c8..9221774761 100644 --- a/src/net_processing.cpp +++ b/src/net_processing.cpp @@ -38,7 +38,9 @@ static constexpr int64_t ORPHAN_TX_EXPIRE_TIME = 20 * 60; /** Minimum time between orphan transactions expire time checks in seconds */ static constexpr int64_t ORPHAN_TX_EXPIRE_INTERVAL = 5 * 60; /** How long to cache transactions in mapRelay for normal relay */ -static constexpr std::chrono::seconds RELAY_TX_CACHE_TIME{15 * 60}; +static constexpr std::chrono::seconds RELAY_TX_CACHE_TIME = std::chrono::minutes{15}; +/** How long a transaction has to be in the mempool before it can unconditionally be relayed (even when not in mapRelay). */ +static constexpr std::chrono::seconds UNCONDITIONAL_RELAY_DELAY = std::chrono::minutes{2}; /** Headers download timeout expressed in microseconds * Timeout = base + per_header * (expected number of headers) */ static constexpr int64_t HEADERS_DOWNLOAD_TIMEOUT_BASE = 15 * 60 * 1000000; // 15 minutes @@ -1617,7 +1619,7 @@ void static ProcessGetBlockData(CNode& pfrom, const CChainParams& chainparams, c } //! Determine whether or not a peer can request a transaction, and return it (or nullptr if not found or not allowed). -CTransactionRef static FindTxForGetData(CNode& peer, const uint256& txid, const std::chrono::seconds mempool_req, const std::chrono::seconds longlived_mempool_time) LOCKS_EXCLUDED(cs_main) +CTransactionRef static FindTxForGetData(const CNode& peer, const uint256& txid, const std::chrono::seconds mempool_req, const std::chrono::seconds now) LOCKS_EXCLUDED(cs_main) { // Check if the requested transaction is so recent that we're just // about to announce it to the peer; if so, they certainly shouldn't @@ -1631,8 +1633,8 @@ CTransactionRef static FindTxForGetData(CNode& peer, const uint256& txid, const if (txinfo.tx) { // To protect privacy, do not answer getdata using the mempool when // that TX couldn't have been INVed in reply to a MEMPOOL request, - // or when it's too recent to have expired from mapRelay. - if ((mempool_req.count() && txinfo.m_time <= mempool_req) || txinfo.m_time <= longlived_mempool_time) { + // and it's more recent than UNCONDITIONAL_RELAY_DELAY. + if ((mempool_req.count() && txinfo.m_time <= mempool_req) || txinfo.m_time <= now - UNCONDITIONAL_RELAY_DELAY) { return txinfo.tx; } } @@ -1655,8 +1657,7 @@ void static ProcessGetData(CNode& pfrom, const CChainParams& chainparams, CConnm std::vector<CInv> vNotFound; const CNetMsgMaker msgMaker(pfrom.GetSendVersion()); - // mempool entries added before this time have likely expired from mapRelay - const std::chrono::seconds longlived_mempool_time = GetTime<std::chrono::seconds>() - RELAY_TX_CACHE_TIME; + const std::chrono::seconds now = GetTime<std::chrono::seconds>(); // Get last mempool request time const std::chrono::seconds mempool_req = pfrom.m_tx_relay != nullptr ? pfrom.m_tx_relay->m_last_mempool_req.load() : std::chrono::seconds::min(); @@ -1677,7 +1678,7 @@ void static ProcessGetData(CNode& pfrom, const CChainParams& chainparams, CConnm continue; } - CTransactionRef tx = FindTxForGetData(pfrom, inv.hash, mempool_req, longlived_mempool_time); + CTransactionRef tx = FindTxForGetData(pfrom, inv.hash, mempool_req, now); if (tx) { int nSendFlags = (inv.type == MSG_TX ? SERIALIZE_TRANSACTION_NO_WITNESS : 0); connman->PushMessage(&pfrom, msgMaker.Make(nSendFlags, NetMsgType::TX, *tx)); |