Branch data Line data Source code
1 : : // Copyright (c) 2023 The Bitcoin Core developers
2 : : // Distributed under the MIT software license, see the accompanying
3 : : // file COPYING or http://www.opensource.org/licenses/mit-license.php.
4 : :
5 : : #include <consensus/validation.h>
6 : : #include <node/context.h>
7 : : #include <node/mempool_args.h>
8 : : #include <node/miner.h>
9 : : #include <test/fuzz/FuzzedDataProvider.h>
10 : : #include <test/fuzz/fuzz.h>
11 [ + - ]: 2 : #include <test/fuzz/util.h>
12 [ + - ]: 2 : #include <test/fuzz/util/mempool.h>
13 : 2 : #include <test/util/mining.h>
14 [ + - ]: 2 : #include <test/util/script.h>
15 [ + - + - : 2 : #include <test/util/setup_common.h>
+ - ]
16 : : #include <test/util/txmempool.h>
17 [ + - ]: 2 : #include <util/rbf.h>
18 [ + - ]: 2 : #include <validation.h>
19 : : #include <validationinterface.h>
20 : :
21 : : using node::NodeContext;
22 : :
23 : : namespace {
24 : :
25 : : const TestingSetup* g_setup;
26 : 2 : std::vector<COutPoint> g_outpoints_coinbase_init_mature;
27 : :
28 : : struct MockedTxPool : public CTxMemPool {
29 : 0 : void RollingFeeUpdate() EXCLUSIVE_LOCKS_REQUIRED(!cs)
30 : : {
31 : 0 : LOCK(cs);
32 [ # # ]: 0 : lastRollingFeeUpdate = GetTime();
33 : 0 : blockSinceLastRollingFeeBump = true;
34 : 0 : }
35 : : };
36 : :
37 : 0 : void initialize_tx_pool()
38 : : {
39 [ # # # # : 0 : static const auto testing_setup = MakeNoLogFileContext<const TestingSetup>();
# # ]
40 : 0 : g_setup = testing_setup.get();
41 : :
42 [ # # ]: 0 : for (int i = 0; i < 2 * COINBASE_MATURITY; ++i) {
43 : 0 : COutPoint prevout{MineBlock(g_setup->m_node, P2WSH_OP_TRUE)};
44 [ # # ]: 0 : if (i < COINBASE_MATURITY) {
45 : : // Remember the txids to avoid expensive disk access later on
46 : 0 : g_outpoints_coinbase_init_mature.push_back(prevout);
47 : 0 : }
48 : 0 : }
49 : 0 : SyncWithValidationInterfaceQueue();
50 : 0 : }
51 : :
52 : : struct OutpointsUpdater final : public CValidationInterface {
53 : : std::set<COutPoint>& m_mempool_outpoints;
54 : :
55 : 0 : explicit OutpointsUpdater(std::set<COutPoint>& r)
56 : 0 : : m_mempool_outpoints{r} {}
57 : :
58 : 0 : void TransactionAddedToMempool(const CTransactionRef& tx, uint64_t /* mempool_sequence */) override
59 : : {
60 : : // for coins spent we always want to be able to rbf so they're not removed
61 : :
62 : : // outputs from this tx can now be spent
63 [ # # ]: 0 : for (uint32_t index{0}; index < tx->vout.size(); ++index) {
64 : 0 : m_mempool_outpoints.insert(COutPoint{tx->GetHash(), index});
65 : 0 : }
66 : 0 : }
67 : :
68 : 0 : void TransactionRemovedFromMempool(const CTransactionRef& tx, MemPoolRemovalReason reason, uint64_t /* mempool_sequence */) override
69 : : {
70 : : // outpoints spent by this tx are now available
71 [ # # ]: 0 : for (const auto& input : tx->vin) {
72 : : // Could already exist if this was a replacement
73 : 0 : m_mempool_outpoints.insert(input.prevout);
74 : 2 : }
75 : : // outpoints created by this tx no longer exist
76 [ # # ]: 0 : for (uint32_t index{0}; index < tx->vout.size(); ++index) {
77 : 0 : m_mempool_outpoints.erase(COutPoint{tx->GetHash(), index});
78 : 0 : }
79 : 0 : }
80 : : };
81 : :
82 : : struct TransactionsDelta final : public CValidationInterface {
83 : : std::set<CTransactionRef>& m_added;
84 : :
85 : 0 : explicit TransactionsDelta(std::set<CTransactionRef>& a)
86 : 0 : : m_added{a} {}
87 : :
88 : 0 : void TransactionAddedToMempool(const CTransactionRef& tx, uint64_t /* mempool_sequence */) override
89 : : {
90 : : // Transactions may be entered and booted any number of times
91 : 0 : m_added.insert(tx);
92 : 0 : }
93 : :
94 : 0 : void TransactionRemovedFromMempool(const CTransactionRef& tx, MemPoolRemovalReason reason, uint64_t /* mempool_sequence */) override
95 : : {
96 : : // Transactions may be entered and booted any number of times
97 : 0 : m_added.erase(tx);
98 : 0 : }
99 : : };
100 : :
101 : 0 : void MockTime(FuzzedDataProvider& fuzzed_data_provider, const Chainstate& chainstate)
102 : : {
103 : 0 : const auto time = ConsumeTime(fuzzed_data_provider,
104 : 0 : chainstate.m_chain.Tip()->GetMedianTimePast() + 1,
105 : 0 : std::numeric_limits<decltype(chainstate.m_chain.Tip()->nTime)>::max());
106 : 0 : SetMockTime(time);
107 : 0 : }
108 : :
109 : 0 : CTxMemPool MakeMempool(FuzzedDataProvider& fuzzed_data_provider, const NodeContext& node)
110 : : {
111 : : // Take the default options for tests...
112 : 0 : CTxMemPool::Options mempool_opts{MemPoolOptionsForTest(node)};
113 : :
114 : :
115 : : // ...override specific options for this specific fuzz suite
116 : 0 : mempool_opts.limits.ancestor_count = fuzzed_data_provider.ConsumeIntegralInRange<unsigned>(0, 50);
117 : 0 : mempool_opts.limits.ancestor_size_vbytes = fuzzed_data_provider.ConsumeIntegralInRange<unsigned>(0, 202) * 1'000;
118 : 0 : mempool_opts.limits.descendant_count = fuzzed_data_provider.ConsumeIntegralInRange<unsigned>(0, 50);
119 : 0 : mempool_opts.limits.descendant_size_vbytes = fuzzed_data_provider.ConsumeIntegralInRange<unsigned>(0, 202) * 1'000;
120 : 0 : mempool_opts.max_size_bytes = fuzzed_data_provider.ConsumeIntegralInRange<unsigned>(0, 200) * 1'000'000;
121 : 0 : mempool_opts.expiry = std::chrono::hours{fuzzed_data_provider.ConsumeIntegralInRange<unsigned>(0, 999)};
122 : 0 : nBytesPerSigOp = fuzzed_data_provider.ConsumeIntegralInRange<unsigned>(1, 999);
123 : :
124 : 0 : mempool_opts.estimator = nullptr;
125 : 0 : mempool_opts.check_ratio = 1;
126 : 0 : mempool_opts.require_standard = fuzzed_data_provider.ConsumeBool();
127 : :
128 : : // ...and construct a CTxMemPool from it
129 : 0 : return CTxMemPool{mempool_opts};
130 : : }
131 : :
132 [ + - - + ]: 4 : FUZZ_TARGET(tx_package_eval, .init = initialize_tx_pool)
133 : : {
134 : 0 : FuzzedDataProvider fuzzed_data_provider(buffer.data(), buffer.size());
135 : 0 : const auto& node = g_setup->m_node;
136 : 0 : auto& chainstate{static_cast<DummyChainState&>(node.chainman->ActiveChainstate())};
137 : :
138 : 0 : MockTime(fuzzed_data_provider, chainstate);
139 : :
140 : : // All RBF-spendable outpoints outside of the unsubmitted package
141 : 0 : std::set<COutPoint> mempool_outpoints;
142 : 0 : std::map<COutPoint, CAmount> outpoints_value;
143 [ # # ]: 0 : for (const auto& outpoint : g_outpoints_coinbase_init_mature) {
144 [ # # # # ]: 0 : Assert(mempool_outpoints.insert(outpoint).second);
145 [ # # ]: 0 : outpoints_value[outpoint] = 50 * COIN;
146 : : }
147 : :
148 [ # # ]: 0 : auto outpoints_updater = std::make_shared<OutpointsUpdater>(mempool_outpoints);
149 [ # # ]: 0 : RegisterSharedValidationInterface(outpoints_updater);
150 : :
151 [ # # ]: 0 : CTxMemPool tx_pool_{MakeMempool(fuzzed_data_provider, node)};
152 : 0 : MockedTxPool& tx_pool = *static_cast<MockedTxPool*>(&tx_pool_);
153 : :
154 [ # # ]: 0 : chainstate.SetMempool(&tx_pool);
155 : :
156 [ # # # # : 0 : LIMITED_WHILE(fuzzed_data_provider.ConsumeBool(), 300)
# # ]
157 : : {
158 [ # # ]: 0 : Assert(!mempool_outpoints.empty());
159 : :
160 : 0 : std::vector<CTransactionRef> txs;
161 : :
162 : : // Make packages of 1-to-26 transactions
163 [ # # ]: 0 : const auto num_txs = (size_t) fuzzed_data_provider.ConsumeIntegralInRange<int>(1, 26);
164 : 0 : std::set<COutPoint> package_outpoints;
165 [ # # ]: 0 : while (txs.size() < num_txs) {
166 : :
167 : : // Last transaction in a package needs to be a child of parents to get further in validation
168 : : // so the last transaction to be generated(in a >1 package) must spend all package-made outputs
169 : : // Note that this test currently only spends package outputs in last transaction.
170 [ # # ]: 0 : bool last_tx = num_txs > 1 && txs.size() == num_txs - 1;
171 : :
172 : : // Create transaction to add to the mempool
173 [ # # ]: 0 : const CTransactionRef tx = [&] {
174 : 0 : CMutableTransaction tx_mut;
175 : 0 : tx_mut.nVersion = CTransaction::CURRENT_VERSION;
176 [ # # # # : 0 : tx_mut.nLockTime = fuzzed_data_provider.ConsumeBool() ? 0 : fuzzed_data_provider.ConsumeIntegral<uint32_t>();
# # ]
177 : : // Last tx will sweep all outpoints in package
178 [ # # ]: 0 : const auto num_in = last_tx ? package_outpoints.size() : fuzzed_data_provider.ConsumeIntegralInRange<int>(1, mempool_outpoints.size());
179 : 0 : const auto num_out = fuzzed_data_provider.ConsumeIntegralInRange<int>(1, mempool_outpoints.size() * 2);
180 : :
181 [ # # ]: 0 : auto& outpoints = last_tx ? package_outpoints : mempool_outpoints;
182 : :
183 [ # # ]: 0 : Assert(!outpoints.empty());
184 : :
185 : 0 : CAmount amount_in{0};
186 [ # # ]: 0 : for (size_t i = 0; i < num_in; ++i) {
187 : : // Pop random outpoint
188 : 0 : auto pop = outpoints.begin();
189 [ # # # # ]: 0 : std::advance(pop, fuzzed_data_provider.ConsumeIntegralInRange<size_t>(0, outpoints.size() - 1));
190 : 0 : const auto outpoint = *pop;
191 [ # # ]: 0 : outpoints.erase(pop);
192 : : // no need to update or erase from outpoints_value
193 [ # # ]: 0 : amount_in += outpoints_value.at(outpoint);
194 : :
195 : : // Create input
196 : 0 : const auto sequence = ConsumeSequence(fuzzed_data_provider);
197 [ # # ]: 0 : const auto script_sig = CScript{};
198 [ # # # # ]: 0 : const auto script_wit_stack = std::vector<std::vector<uint8_t>>{WITNESS_STACK_ELEM_OP_TRUE};
199 [ # # ]: 0 : CTxIn in;
200 : 0 : in.prevout = outpoint;
201 : 0 : in.nSequence = sequence;
202 [ # # ]: 0 : in.scriptSig = script_sig;
203 [ # # ]: 0 : in.scriptWitness.stack = script_wit_stack;
204 : :
205 [ # # ]: 0 : tx_mut.vin.push_back(in);
206 : 0 : }
207 [ # # ]: 0 : const auto amount_fee = fuzzed_data_provider.ConsumeIntegralInRange<CAmount>(0, amount_in);
208 : 0 : const auto amount_out = (amount_in - amount_fee) / num_out;
209 [ # # ]: 0 : for (int i = 0; i < num_out; ++i) {
210 [ # # ]: 0 : tx_mut.vout.emplace_back(amount_out, P2WSH_OP_TRUE);
211 : 0 : }
212 : : // TODO vary transaction sizes to catch size-related issues
213 [ # # ]: 0 : auto tx = MakeTransactionRef(tx_mut);
214 : : // Restore previously removed outpoints, except in-package outpoints
215 [ # # ]: 0 : if (!last_tx) {
216 [ # # ]: 0 : for (const auto& in : tx->vin) {
217 [ # # # # ]: 0 : Assert(outpoints.insert(in.prevout).second);
218 : : }
219 : : // Cache the in-package outpoints being made
220 [ # # ]: 0 : for (size_t i = 0; i < tx->vout.size(); ++i) {
221 [ # # # # ]: 0 : package_outpoints.emplace(tx->GetHash(), i);
222 : 0 : }
223 : 0 : }
224 : : // We need newly-created values for the duration of this run
225 [ # # ]: 0 : for (size_t i = 0; i < tx->vout.size(); ++i) {
226 [ # # # # : 0 : outpoints_value[COutPoint(tx->GetHash(), i)] = tx->vout[i].nValue;
# # ]
227 : 0 : }
228 : 0 : return tx;
229 [ # # ]: 0 : }();
230 [ # # ]: 0 : txs.push_back(tx);
231 : 0 : }
232 : :
233 [ # # # # ]: 0 : if (fuzzed_data_provider.ConsumeBool()) {
234 [ # # ]: 0 : MockTime(fuzzed_data_provider, chainstate);
235 : 0 : }
236 [ # # # # ]: 0 : if (fuzzed_data_provider.ConsumeBool()) {
237 [ # # ]: 0 : tx_pool.RollingFeeUpdate();
238 : 0 : }
239 [ # # # # ]: 0 : if (fuzzed_data_provider.ConsumeBool()) {
240 [ # # # # ]: 0 : const auto& txid = fuzzed_data_provider.ConsumeBool() ?
241 [ # # ]: 0 : txs.back()->GetHash() :
242 [ # # ]: 0 : PickValue(fuzzed_data_provider, mempool_outpoints).hash;
243 [ # # ]: 0 : const auto delta = fuzzed_data_provider.ConsumeIntegralInRange<CAmount>(-50 * COIN, +50 * COIN);
244 [ # # ]: 0 : tx_pool.PrioritiseTransaction(txid, delta);
245 : 0 : }
246 : :
247 : : // Remember all added transactions
248 : 0 : std::set<CTransactionRef> added;
249 [ # # ]: 0 : auto txr = std::make_shared<TransactionsDelta>(added);
250 [ # # ]: 0 : RegisterSharedValidationInterface(txr);
251 [ # # ]: 0 : const bool bypass_limits = fuzzed_data_provider.ConsumeBool();
252 : :
253 : : // When there are multiple transactions in the package, we call ProcessNewPackage(txs, test_accept=false)
254 : : // and AcceptToMemoryPool(txs.back(), test_accept=true). When there is only 1 transaction, we might flip it
255 : : // (the package is a test accept and ATMP is a submission).
256 [ # # # # ]: 0 : auto single_submit = txs.size() == 1 && fuzzed_data_provider.ConsumeBool();
257 : :
258 [ # # # # : 0 : const auto result_package = WITH_LOCK(::cs_main,
# # ]
259 : : return ProcessNewPackage(chainstate, tx_pool, txs, /*test_accept=*/single_submit));
260 : : // If something went wrong due to a package-specific policy, it might not return a
261 : : // validation result for the transaction.
262 [ # # # # ]: 0 : if (result_package.m_state.GetResult() != PackageValidationResult::PCKG_POLICY) {
263 [ # # # # ]: 0 : auto it = result_package.m_tx_results.find(txs.back()->GetWitnessHash());
264 [ # # ]: 0 : Assert(it != result_package.m_tx_results.end());
265 [ # # # # : 0 : Assert(it->second.m_result_type == MempoolAcceptResult::ResultType::VALID ||
# # ]
266 : : it->second.m_result_type == MempoolAcceptResult::ResultType::INVALID ||
267 : : it->second.m_result_type == MempoolAcceptResult::ResultType::MEMPOOL_ENTRY);
268 : 0 : }
269 : :
270 [ # # # # : 0 : const auto res = WITH_LOCK(::cs_main, return AcceptToMemoryPool(chainstate, txs.back(), GetTime(), bypass_limits, /*test_accept=*/!single_submit));
# # # # ]
271 : 0 : const bool accepted = res.m_result_type == MempoolAcceptResult::ResultType::VALID;
272 : :
273 [ # # ]: 0 : SyncWithValidationInterfaceQueue();
274 [ # # ]: 0 : UnregisterSharedValidationInterface(txr);
275 : :
276 : : // There is only 1 transaction in the package. We did a test-package-accept and a ATMP
277 [ # # ]: 0 : if (single_submit) {
278 [ # # ]: 0 : Assert(accepted != added.empty());
279 [ # # # # ]: 0 : Assert(accepted == res.m_state.IsValid());
280 [ # # ]: 0 : if (accepted) {
281 [ # # ]: 0 : Assert(added.size() == 1);
282 [ # # ]: 0 : Assert(txs.back() == *added.begin());
283 : 0 : }
284 : 0 : } else {
285 : : // This is empty if it fails early checks, or "full" if transactions are looked at deeper
286 [ # # # # ]: 0 : Assert(result_package.m_tx_results.size() == txs.size() || result_package.m_tx_results.empty());
287 : : }
288 : 0 : }
289 : :
290 [ # # ]: 0 : UnregisterSharedValidationInterface(outpoints_updater);
291 : :
292 [ # # # # : 0 : WITH_LOCK(::cs_main, tx_pool.check(chainstate.CoinsTip(), chainstate.m_chain.Height() + 1));
# # # # #
# ]
293 : 0 : }
294 : : } // namespace
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