v29.4-roots.2 · Commit 3: [PATCH 03/21] policy: restore conservative relay and network controls

src/txmempool.cpp

Before: src/txmempool.cpp · After: src/txmempool.cpp

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index 3a5a3fb306d38669600ac395c58c68c10f27f787..dd76521e4e288b6aa428a29c64f021d9b2ef13fd 100644

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+ Added− RemovedUnmarked lines are context.

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src/txmempool.cpp CHANGED Viewed

@@ -11,11 +11,16 @@
 #include <consensus/consensus.h>
 #include <consensus/tx_verify.h>
 #include <consensus/validation.h>
+#include <crypto/ripemd160.h>
 #include <logging.h>
+#include <policy/coin_age_priority.h>
+#include <policy/fees.h>
 #include <policy/policy.h>
 #include <policy/settings.h>
 #include <random.h>
+#include <scheduler.h>
 #include <tinyformat.h>
+#include <script/script.h>
 #include <util/check.h>
 #include <util/feefrac.h>
 #include <util/moneystr.h>
@@ -54,6 +59,13 @@ bool TestLockPointValidity(CChain& active_chain, const LockPoints& lp)
     return true;
 }
+uint160 ScriptHashkey(const CScript& script)
+{
+    uint160 hash;
+    CRIPEMD160().Write(script.data(), script.size()).Finalize(hash.begin());
+    return hash;
+}
 void CTxMemPool::UpdateForDescendants(txiter updateIt, cacheMap& cachedDescendants,
                                       const std::set<uint256>& setExclude, std::set<uint256>& descendants_to_remove)
 {
@@ -404,7 +416,7 @@ void CTxMemPoolEntry::UpdateAncestorState(int32_t modifySize, CAmount modifyFee,
 static CTxMemPool::Options&& Flatten(CTxMemPool::Options&& opts, bilingual_str& error)
 {
     opts.check_ratio = std::clamp<int>(opts.check_ratio, 0, 1'000'000);
-    int64_t descendant_limit_bytes = opts.limits.descendant_size_vbytes * 40;
+    int64_t descendant_limit_bytes = maxmempoolMinimumBytes(opts.limits.descendant_size_vbytes);
     if (opts.max_size_bytes < 0 || opts.max_size_bytes < descendant_limit_bytes) {
         error = strprintf(_("-maxmempool must be at least %d MB"), std::ceil(descendant_limit_bytes / 1'000'000.0));
     }
@@ -414,6 +426,17 @@ static CTxMemPool::Options&& Flatten(CTxMemPool::Options&& opts, bilingual_str&
 CTxMemPool::CTxMemPool(Options opts, bilingual_str& error)
     : m_opts{Flatten(std::move(opts), error)}
 {
+    Assert(m_opts.scheduler || !m_opts.dust_relay_target);
+    m_opts.dust_relay_feerate_floor = m_opts.dust_relay_feerate;
+#ifdef BUILDING_FOR_LIBBITCOINKERNEL
+    assert(!m_opts.scheduler);
+#else
+    if (m_opts.scheduler) {
+        m_opts.scheduler->scheduleEvery([this]{
+            UpdateDynamicDustFeerate();
+        }, DYNAMIC_DUST_FEERATE_UPDATE_INTERVAL);
+    }
+#endif
 }
 bool CTxMemPool::isSpent(const COutPoint& outpoint) const
@@ -453,11 +476,20 @@ void CTxMemPool::Apply(ChangeSet* changeset)
             ancestors = *Assume(changeset->CalculateMemPoolAncestors(tx_entry, Limits::NoLimits()));
         }
         // First splice this entry into mapTx.
+#if BOOST_VERSION >= 107400
         auto node_handle = changeset->m_to_add.extract(tx_entry);
         auto result = mapTx.insert(std::move(node_handle));
         Assume(result.inserted);
         txiter it = result.position;
+#else
+        // Boost 1.73 didn't support node extraction, so we have to copy
+        auto result = mapTx.emplace(CTxMemPoolEntry::ExplicitCopy, *tx_entry);
+        changeset->m_to_add.erase(tx_entry);
+        Assume(result.second);
+        txiter it = result.first;
+#endif
         // Now update the entry for ancestors/descendants.
         if (ancestors.has_value()) {
@@ -510,6 +542,17 @@ void CTxMemPool::addNewTransaction(CTxMemPool::txiter newit, CTxMemPool::setEntr
     txns_randomized.emplace_back(newit->GetSharedTx());
     newit->idx_randomized = txns_randomized.size() - 1;
+    for (auto& vSPK : entry.mapSPK) {
+        const uint160& SPKKey = vSPK.first;
+        const MemPool_SPK_State& claims = vSPK.second;
+        if (claims & MSS_CREATED) {
+            mapUsedSPK[SPKKey].first = &tx;
+        }
+        if (claims & MSS_SPENT) {
+            mapUsedSPK[SPKKey].second = &tx;
+        }
+    }
     TRACEPOINT(mempool, added,
         entry.GetTx().GetHash().data(),
         entry.GetTxSize(),
@@ -538,6 +581,7 @@ void CTxMemPool::removeUnchecked(txiter it, MemPoolRemovalReason reason)
         std::chrono::duration_cast<std::chrono::duration<std::uint64_t>>(it->GetTime()).count()
     );
+    const CTransaction& tx = it->GetTx();
     for (const CTxIn& txin : it->GetTx().vin)
         mapNextTx.erase(txin.prevout);
@@ -554,6 +598,19 @@ void CTxMemPool::removeUnchecked(txiter it, MemPoolRemovalReason reason)
     } else
         txns_randomized.clear();
+    for (auto& vSPK : it->mapSPK) {
+        const uint160& SPKKey = vSPK.first;
+        if (mapUsedSPK[SPKKey].first == &tx) {
+            mapUsedSPK[SPKKey].first = NULL;
+        }
+        if (mapUsedSPK[SPKKey].second == &tx) {
+            mapUsedSPK[SPKKey].second = NULL;
+        }
+        if (!(mapUsedSPK[SPKKey].first || mapUsedSPK[SPKKey].second)) {
+            mapUsedSPK.erase(SPKKey);
+        }
+    }
     totalTxSize -= it->GetTxSize();
     m_total_fee -= it->GetFee();
     cachedInnerUsage -= it->DynamicMemoryUsage();
@@ -669,9 +726,11 @@ void CTxMemPool::removeForBlock(const std::vector<CTransactionRef>& vtx, unsigne
     AssertLockHeld(cs);
     Assume(!m_have_changeset);
     std::vector<RemovedMempoolTransactionInfo> txs_removed_for_block;
+    if (mapTx.size() || mapNextTx.size() || mapDeltas.size()) {
     txs_removed_for_block.reserve(vtx.size());
     for (const auto& tx : vtx)
     {
+        UpdateDependentPriorities(*tx, nBlockHeight, true);
         txiter it = mapTx.find(tx->GetHash());
         if (it != mapTx.end()) {
             setEntries stage;
@@ -682,6 +741,7 @@ void CTxMemPool::removeForBlock(const std::vector<CTransactionRef>& vtx, unsigne
         removeConflicts(*tx);
         ClearPrioritisation(tx->GetHash());
     }
+    }
     if (m_opts.signals) {
         m_opts.signals->MempoolTransactionsRemovedForBlock(txs_removed_for_block, nBlockHeight);
     }
@@ -689,6 +749,38 @@ void CTxMemPool::removeForBlock(const std::vector<CTransactionRef>& vtx, unsigne
     blockSinceLastRollingFeeBump = true;
 }
+#ifndef BUILDING_FOR_LIBBITCOINKERNEL
+void CTxMemPool::UpdateDynamicDustFeerate()
+{
+    CFeeRate est_feerate{0};
+    if (m_opts.dust_relay_target < 0 && m_opts.estimator) {
+        static constexpr double target_success_threshold{0.8};
+        est_feerate = m_opts.estimator->estimateRawFee(-m_opts.dust_relay_target, target_success_threshold, FeeEstimateHorizon::LONG_HALFLIFE, nullptr);
+    } else if (m_opts.dust_relay_target > 0) {
+        auto bytes_remaining = int64_t{m_opts.dust_relay_target} * 1'000;
+        LOCK(cs);
+        for (auto mi = mapTx.get<ancestor_score>().begin(); mi != mapTx.get<ancestor_score>().end(); ++mi) {
+            bytes_remaining -= mi->GetTxSize();
+            if (bytes_remaining <= 0) {
+                est_feerate = CFeeRate(mi->GetFee(), mi->GetTxSize());
+                break;
+            }
+        }
+    }
+    est_feerate = (est_feerate * m_opts.dust_relay_multiplier) / 1'000;
+    if (est_feerate < m_opts.dust_relay_feerate_floor) {
+        est_feerate = m_opts.dust_relay_feerate_floor;
+    }
+    if (m_opts.dust_relay_feerate != est_feerate) {
+        LogDebug(BCLog::MEMPOOL, "Updating dust feerate to %s\n", est_feerate.ToString(FeeEstimateMode::SAT_VB));
+        m_opts.dust_relay_feerate = est_feerate;
+    }
+}
+#endif
 void CTxMemPool::check(const CCoinsViewCache& active_coins_tip, int64_t spendheight) const
 {
     if (m_opts.check_ratio == 0) return;
@@ -708,6 +800,14 @@ void CTxMemPool::check(const CCoinsViewCache& active_coins_tip, int64_t spendhei
     for (const auto& it : GetSortedDepthAndScore()) {
         checkTotal += it->GetTxSize();
+        const auto fresh_coin_age = GetCoinAge(it->GetTx(), active_coins_tip, spendheight);
+        const auto fresh_mod_vsize = CalculateModifiedSize(it->GetTx(), it->GetTxSize());
+        const double freshPriority = ComputePriority2(fresh_coin_age.inputs_coin_age, fresh_mod_vsize);
+        double cachePriority = it->GetPriority(spendheight);
+        double priDiff = cachePriority > freshPriority ? cachePriority - freshPriority : freshPriority - cachePriority;
+        // Verify that the difference between the on the fly calculation and a fresh calculation
+        // is small enough to be a result of double imprecision.
+        assert(priDiff < .0001 * freshPriority + 1);
         check_total_fee += it->GetFee();
         innerUsage += it->DynamicMemoryUsage();
         const CTransaction& tx = it->GetTx();
@@ -844,6 +944,21 @@ std::vector<CTxMemPool::indexed_transaction_set::const_iterator> CTxMemPool::Get
     return iters;
 }
+void CTxMemPool::FindScriptPubKey(const std::set<CScript>& needles, std::map<COutPoint, Coin>& out_results) {
+    LOCK(cs);
+    for (const CTxMemPoolEntry& entry : mapTx) {
+        const CTransaction& tx = entry.GetTx();
+        const Txid& hash = tx.GetHash();
+        for (size_t txo_index = tx.vout.size(); txo_index > 0; ) {
+            --txo_index;
+            const CTxOut& txo = tx.vout[txo_index];
+            if (needles.count(txo.scriptPubKey)) {
+                out_results.emplace(COutPoint(hash, txo_index), Coin(txo, MEMPOOL_HEIGHT, false));
+            }
+        }
+    }
+}
 static TxMempoolInfo GetInfo(CTxMemPool::indexed_transaction_set::const_iterator it) {
     return TxMempoolInfo{it->GetSharedTx(), it->GetTime(), it->GetFee(), it->GetTxSize(), it->GetModifiedFee() - it->GetFee()};
 }
@@ -910,15 +1025,17 @@ TxMempoolInfo CTxMemPool::info_for_relay(const GenTxid& gtxid, uint64_t last_seq
     }
 }
-void CTxMemPool::PrioritiseTransaction(const uint256& hash, const CAmount& nFeeDelta)
+void CTxMemPool::PrioritiseTransaction(const uint256& hash, double dPriorityDelta, const CAmount& nFeeDelta)
 {
     {
         LOCK(cs);
-        CAmount &delta = mapDeltas[hash];
-        delta = SaturatingAdd(delta, nFeeDelta);
+        std::pair<double, CAmount> &deltas = mapDeltas[hash];
+        deltas.first += dPriorityDelta;
+        deltas.second = SaturatingAdd(deltas.second, nFeeDelta);
         txiter it = mapTx.find(hash);
         if (it != mapTx.end()) {
             mapTx.modify(it, [&nFeeDelta](CTxMemPoolEntry& e) { e.UpdateModifiedFee(nFeeDelta); });
             // Now update all ancestors' modified fees with descendants
             auto ancestors{AssumeCalculateMemPoolAncestors(__func__, *it, Limits::NoLimits(), /*fSearchForParents=*/false)};
             for (txiter ancestorIt : ancestors) {
@@ -933,27 +1050,29 @@ void CTxMemPool::PrioritiseTransaction(const uint256& hash, const CAmount& nFeeD
             }
             ++nTransactionsUpdated;
         }
-        if (delta == 0) {
+        if (deltas.first == 0. && deltas.second == 0) {
             mapDeltas.erase(hash);
             LogPrintf("PrioritiseTransaction: %s (%sin mempool) delta cleared\n", hash.ToString(), it == mapTx.end() ? "not " : "");
         } else {
-            LogPrintf("PrioritiseTransaction: %s (%sin mempool) fee += %s, new delta=%s\n",
+            LogPrintf("PrioritiseTransaction: %s (%sin mempool) priority += %f, fee += %s, new delta=%s\n",
                       hash.ToString(),
                       it == mapTx.end() ? "not " : "",
+                      dPriorityDelta,
                       FormatMoney(nFeeDelta),
-                      FormatMoney(delta));
+                      FormatMoney(deltas.second));
         }
     }
 }
-void CTxMemPool::ApplyDelta(const uint256& hash, CAmount &nFeeDelta) const
+void CTxMemPool::ApplyDeltas(const uint256& hash, double &dPriorityDelta, CAmount &nFeeDelta) const
 {
     AssertLockHeld(cs);
-    std::map<uint256, CAmount>::const_iterator pos = mapDeltas.find(hash);
+    std::map<uint256, std::pair<double, CAmount> >::const_iterator pos = mapDeltas.find(hash);
     if (pos == mapDeltas.end())
         return;
-    const CAmount &delta = pos->second;
-    nFeeDelta += delta;
+    const std::pair<double, CAmount> &deltas = pos->second;
+    dPriorityDelta += deltas.first;
+    nFeeDelta += deltas.second;
 }
 void CTxMemPool::ClearPrioritisation(const uint256& hash)
@@ -973,7 +1092,7 @@ std::vector<CTxMemPool::delta_info> CTxMemPool::GetPrioritisedTransactions() con
         const bool in_mempool{iter != mapTx.end()};
         std::optional<CAmount> modified_fee;
         if (in_mempool) modified_fee = iter->GetModifiedFee();
-        result.emplace_back(delta_info{in_mempool, delta, modified_fee, txid});
+        result.emplace_back(delta_info{in_mempool, delta.second, delta.first, modified_fee, txid});
     }
     return result;
 }
@@ -1403,13 +1522,15 @@ util::Result<std::pair<std::vector<FeeFrac>, std::vector<FeeFrac>>> CTxMemPool::
     return std::make_pair(old_chunks, new_chunks);
 }
-CTxMemPool::ChangeSet::TxHandle CTxMemPool::ChangeSet::StageAddition(const CTransactionRef& tx, const CAmount fee, int64_t time, unsigned int entry_height, uint64_t entry_sequence, bool spends_coinbase, int64_t sigops_cost, LockPoints lp)
+CTxMemPool::ChangeSet::TxHandle CTxMemPool::ChangeSet::StageAddition(const CTransactionRef& tx, const CAmount fee, int64_t time, unsigned int entry_height, uint64_t entry_sequence, const CoinAgeCache coin_age_cache, bool spends_coinbase, int32_t extra_weight, int64_t sigops_cost, LockPoints lp)
 {
     LOCK(m_pool->cs);
     Assume(m_to_add.find(tx->GetHash()) == m_to_add.end());
-    auto newit = m_to_add.emplace(tx, fee, time, entry_height, entry_sequence, spends_coinbase, sigops_cost, lp).first;
+    auto newit = m_to_add.emplace(tx, fee, time, entry_height, entry_sequence, coin_age_cache, spends_coinbase, /*extra_weight=*/ extra_weight, /*sigops_cost=*/ sigops_cost, lp).first;
+    double priority_delta{0.};
     CAmount delta{0};
-    m_pool->ApplyDelta(tx->GetHash(), delta);
+    m_pool->ApplyDeltas(tx->GetHash(), priority_delta, delta);
+    // NOTE: priority_delta is handled in addPriorityTxs
     if (delta) m_to_add.modify(newit, [&delta](CTxMemPoolEntry& e) { e.UpdateModifiedFee(delta); });
     m_entry_vec.push_back(newit);