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Stable release v32.1bitcoin/bitcoin · f0de87f04062 ↗3,020 source files · 47.5 MB stored on the server440 file guides

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bitcoin / bitcoinstable

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bitcoin / src / test / fuzz / txorphan.cpp

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251
252    // The actual limit, MaxPeerLatencyScore(), may be higher, since TxOrphanage only counts peers
253    // that have announced an orphan. The honest peer will not experience evictions if it never
254    // exceeds this.
255    const unsigned int honest_latency_limit = global_latency_score_limit / num_peers;
256    // Honest peer will not experience evictions if it never exceeds this.
257    const int64_t honest_mem_limit = per_peer_weight_reservation;
258
259    std::vector<COutPoint> outpoints; // Duplicates are tolerated
260    outpoints.reserve(400);
261
262    // initial outpoints used to construct transactions later
263    for (uint8_t i = 0; i < 4; i++) {
264        outpoints.emplace_back(Txid::FromUint256(uint256{i}), 0);
265    }
266
267    // These are honest peer's live announcements. We expect them to be protected from eviction.
268    std::set<Wtxid> protected_wtxids;
269
270    LIMITED_WHILE (outpoints.size() < 400 && fuzzed_data_provider.ConsumeBool(), 1000) {
271        // construct transaction
272        const CTransactionRef tx = [&] {
273            CMutableTransaction tx_mut;
274            const auto num_in = fuzzed_data_provider.ConsumeIntegralInRange<uint32_t>(1, outpoints.size());
275            const auto num_out = fuzzed_data_provider.ConsumeIntegralInRange<uint32_t>(1, 256);
276            // pick outpoints from outpoints as input. We allow input duplicates on purpose, given we are not
277            // running any transaction validation logic before adding transactions to the orphanage
278            tx_mut.vin.reserve(num_in);
279            for (uint32_t i = 0; i < num_in; i++) {
280                auto& prevout = PickValue(fuzzed_data_provider, outpoints);
281                // try making transactions unique by setting a random nSequence, but allow duplicate transactions if they happen
282                tx_mut.vin.emplace_back(prevout, CScript{}, fuzzed_data_provider.ConsumeIntegralInRange<uint32_t>(0, CTxIn::SEQUENCE_FINAL));
283            }
284            // output amount or spendability will not affect txorphanage
285            tx_mut.vout.reserve(num_out);
286            for (uint32_t i = 0; i < num_out; i++) {
287                const auto payload_size = fuzzed_data_provider.ConsumeIntegralInRange<unsigned int>(0, 100000);
288                if (payload_size) {
289                    tx_mut.vout.emplace_back(0, CScript() << OP_RETURN << std::vector<unsigned char>(payload_size));
290                } else {
291                    tx_mut.vout.emplace_back(0, CScript{});
292                }
293            }
294            auto new_tx = MakeTransactionRef(tx_mut);
295            // add newly constructed outpoints to the coin pool
296            for (uint32_t i = 0; i < num_out; i++) {
297                outpoints.emplace_back(new_tx->GetHash(), i);
298            }
299            return new_tx;
300        }();
301
302        const auto wtxid{tx->GetWitnessHash()};
303
304        // orphanage functions
305        LIMITED_WHILE (fuzzed_data_provider.remaining_bytes(), 10 * global_latency_score_limit) {
306            NodeId peer_id = fuzzed_data_provider.ConsumeIntegralInRange<NodeId>(0, num_peers - 1);
307            const auto tx_weight{GetTransactionWeight(*tx)};
308
309            // This protected peer will never send orphans that would
310            // exceed their own personal allotment, so is never evicted.
311            const bool peer_is_protected{protected_peers[peer_id]};
312
313            CallOneOf(
314                fuzzed_data_provider,
315                [&] { // AddTx
316                    bool have_tx_and_peer = orphanage->HaveTxFromPeer(wtxid, peer_id);
317                    if (peer_is_protected && !have_tx_and_peer &&
318                        (orphanage->UsageByPeer(peer_id) + tx_weight > honest_mem_limit ||
319                        orphanage->LatencyScoreFromPeer(peer_id) + (tx->vin.size() / 10) + 1 > honest_latency_limit)) {
320                        // We never want our protected peer oversized or over-announced
321                    } else {
322                        orphanage->AddTx(tx, peer_id);
323                        if (peer_is_protected && orphanage->HaveTxFromPeer(wtxid, peer_id)) {
324                            protected_wtxids.insert(wtxid);
325                        }
326                    }
327                },
328                [&] { // AddAnnouncer
329                    bool have_tx_and_peer = orphanage->HaveTxFromPeer(tx->GetWitnessHash(), peer_id);
330                    // AddAnnouncer should return false if tx doesn't exist or we already HaveTxFromPeer.
331                    {
332                        if (peer_is_protected && !have_tx_and_peer &&
333                            (orphanage->UsageByPeer(peer_id) + tx_weight > honest_mem_limit ||
334                            orphanage->LatencyScoreFromPeer(peer_id) + (tx->vin.size() / 10) + 1 > honest_latency_limit)) {
335                            // We never want our protected peer oversized
336                        } else {
337                            orphanage->AddAnnouncer(tx->GetWitnessHash(), peer_id);
338                            if (peer_is_protected && orphanage->HaveTxFromPeer(wtxid, peer_id)) {
339                                protected_wtxids.insert(wtxid);
340                            }
341                        }
342                    }
343                },
344                [&] { // EraseTx
345                    if (protected_wtxids.contains(tx->GetWitnessHash())) {
346                        protected_wtxids.erase(wtxid);
347                    }
348                    orphanage->EraseTx(wtxid);
349                    Assert(!orphanage->HaveTx(wtxid));
350                },
351                [&] { // EraseForPeer
352                    if (!protected_peers[peer_id]) {
353                        orphanage->EraseForPeer(peer_id);
354                        Assert(orphanage->UsageByPeer(peer_id) == 0);
355                        Assert(orphanage->LatencyScoreFromPeer(peer_id) == 0);
356                        Assert(orphanage->AnnouncementsFromPeer(peer_id) == 0);
357                    }
358                }
359            );
360        }
361    }
362
363    orphanage->SanityCheck();
364    // All of the honest peer's announcements are still present.
365    for (const auto& wtxid : protected_wtxids) {
366        Assert(orphanage->HaveTx(wtxid));
367    }
368}
369
370FUZZ_TARGET(txorphanage_sim)
371{
372    SeedRandomStateForTest(SeedRand::ZEROS);
373    // This is a comprehensive simulation fuzz test, which runs through a scenario involving up to
374    // 16 transactions (which may have simple or complex topology, and may have duplicate txids
375    // with distinct wtxids, and up to 16 peers. The scenario is performed both on a real
376    // TxOrphanage object and the behavior is compared with a naive reimplementation (just a vector
377    // of announcements) where possible, and tested for desired properties where not possible.
378
379    //
380    // 1. Setup.
381    //
382
383    /** The total number of transactions this simulation uses (not all of which will necessarily
384     *  be present in the orphanage at once). */
385    static constexpr unsigned NUM_TX = 16;
386    /** The number of peers this simulation uses (not all of which will necessarily be present in
387     *  the orphanage at once). */
388    static constexpr unsigned NUM_PEERS = 16;
389    /** The maximum number of announcements this simulation uses (which may be higher than the
390     *  number permitted inside the orphanage). */
391    static constexpr unsigned MAX_ANN = 64;
392
393    FuzzedDataProvider provider(buffer.data(), buffer.size());
394    /** Local RNG. Only used for topology/sizes of the transaction set, the order of transactions
395     *  in EraseForBlock, and for the randomized passed to AddChildrenToWorkSet. */
396    InsecureRandomContext rng(provider.ConsumeIntegral<uint64_t>());
397
398    //
399    // 2. Construct an interesting set of 16 transactions.
400    //
401
402    // - Pick a topological order among the transactions.
403    std::vector<unsigned> txorder(NUM_TX);
404    std::iota(txorder.begin(), txorder.end(), unsigned{0});
405    std::shuffle(txorder.begin(), txorder.end(), rng);
406    // - Pick a set of dependencies (pair<child_index, parent_index>).
407    std::vector<std::pair<unsigned, unsigned>> deps;
408    deps.reserve((NUM_TX * (NUM_TX - 1)) / 2);
409    for (unsigned p = 0; p < NUM_TX - 1; ++p) {
410        for (unsigned c = p + 1; c < NUM_TX; ++c) {
411            deps.emplace_back(c, p);
412        }
413    }
414    std::shuffle(deps.begin(), deps.end(), rng);
415    deps.resize(provider.ConsumeIntegralInRange<unsigned>(0, NUM_TX * 4 - 1));
416    // - Construct the actual transactions.
417    std::set<Wtxid> wtxids;
418    std::vector<CTransactionRef> txn(NUM_TX);
419    node::TxOrphanage::Usage total_usage{0};
420    for (unsigned t = 0; t < NUM_TX; ++t) {
421        CMutableTransaction tx;
422        if (t > 0 && rng.randrange(4) == 0) {
423            // Occasionally duplicate the previous transaction, so that repetitions of the same
424            // txid are possible (with different wtxid).
425            tx = CMutableTransaction(*txn[txorder[t - 1]]);
426        } else {
427            tx.version = 1;
428            tx.nLockTime = 0xffffffff;
429            // Construct 1 to 16 outputs.
430            auto num_outputs = rng.randrange<unsigned>(1 << rng.randrange<unsigned>(5)) + 1;
431            for (unsigned output = 0; output < num_outputs; ++output) {
432                CScript scriptpubkey;
433                scriptpubkey.resize(provider.ConsumeIntegralInRange<unsigned>(20, 34));
434                tx.vout.emplace_back(CAmount{0}, std::move(scriptpubkey));
435            }
436            // Construct inputs (one for each dependency).
437            for (auto& [child, parent] : deps) {
438                if (child == t) {
439                    auto& partx = txn[txorder[parent]];
440                    assert(partx->version == 1);
441                    COutPoint outpoint(partx->GetHash(), rng.randrange<size_t>(partx->vout.size()));
442                    tx.vin.emplace_back(outpoint);
443                    tx.vin.back().scriptSig.resize(provider.ConsumeIntegralInRange<unsigned>(16, 200));
444                }
445            }
446            // Construct fallback input in case there are no dependencies.
447            if (tx.vin.empty()) {
448                COutPoint outpoint(Txid::FromUint256(rng.rand256()), rng.randrange<size_t>(16));
449                tx.vin.emplace_back(outpoint);
450                tx.vin.back().scriptSig.resize(provider.ConsumeIntegralInRange<unsigned>(16, 200));
451            }
452        }
453        // Optionally modify the witness (allowing wtxid != txid), and certainly when the wtxid
454        // already exists.
455        while (wtxids.contains(CTransaction(tx).GetWitnessHash()) || rng.randrange(4) == 0) {
456            auto& input = tx.vin[rng.randrange(tx.vin.size())];
457            if (rng.randbool()) {
458                input.scriptWitness.stack.resize(1);
459                input.scriptWitness.stack[0].resize(rng.randrange(100));
460            } else {
461                input.scriptWitness.stack.resize(0);
462            }
463        }
464        // Convert to CTransactionRef.
465        txn[txorder[t]] = MakeTransactionRef(std::move(tx));
466        wtxids.insert(txn[txorder[t]]->GetWitnessHash());
467        auto weight = GetTransactionWeight(*txn[txorder[t]]);
468        assert(weight < MAX_STANDARD_TX_WEIGHT);
469        total_usage += GetTransactionWeight(*txn[txorder[t]]);
470    }
471
472    //
473    // 3. Initialize real orphanage
474    //
475
476    auto max_global_latency_score = provider.ConsumeIntegralInRange<node::TxOrphanage::Count>(NUM_PEERS, MAX_ANN);
477    auto reserved_peer_usage = provider.ConsumeIntegralInRange<node::TxOrphanage::Usage>(1, total_usage);
478    auto real = node::MakeTxOrphanage(max_global_latency_score, reserved_peer_usage);
479
480    //
481    // 4. Functions and data structures for the simulation.
482    //
483
484    /** Data structure representing one announcement (pair of (tx, peer), plus whether it's
485     *  reconsiderable or not. */
486    struct SimAnnouncement
487    {
488        unsigned tx;
489        NodeId announcer;
490        bool reconsider{false};
491        SimAnnouncement(unsigned tx_in, NodeId announcer_in, bool reconsider_in) noexcept :
492            tx(tx_in), announcer(announcer_in), reconsider(reconsider_in) {}
493    };
494    /** The entire simulated orphanage is represented by this list of announcements, in
495     *  announcement order (unlike TxOrphanageImpl which uses a sequence number to represent
496     *  announcement order). New announcements are added to the back. */
497    std::vector<SimAnnouncement> sim_announcements;
498
499    /** Consume a transaction (index into txn) from provider. */
500    auto read_tx_fn = [&]() -> unsigned { return provider.ConsumeIntegralInRange<unsigned>(0, NUM_TX - 1); };

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440 guided files · 2,580 pending. Guides cover key sections, not every line.

cmake/bitcoin-build-config.h.in src/consensus/amount.h src/consensus/consensus.h src/primitives/block.h src/primitives/transaction.h src/crypto/sha256.h src/util/moneystr.h src/clientversion.h src/uint256.h src/script/script.h src/policy/policy.h CMakeLists.txt README.md COPYING src/consensus/tx_check.cpp src/consensus/tx_verify.cpp src/consensus/merkle.cpp src/pow.cpp src/validation.cpp src/script/interpreter.cpp src/script/solver.cpp src/script/sign.cpp src/key_io.cpp src/net.cpp src/net_processing.cpp src/netaddress.cpp src/protocol.h src/wallet/wallet.cpp src/wallet/spend.cpp

← Previous 250 linesCode page 2Next 250 lines →

src/wallet/receive.cpp

src/wallet/coinselection.cpp

src/consensus/validation.h

src/primitives/transaction.cpp

src/script/descriptor.cpp

src/bitcoin-cli.cpp

src/rpc/blockchain.cpp

src/rpc/rawtransaction.cpp

src/init.cpp

src/crypto/sha256.cpp

src/consensus/merkle.h

src/consensus/tx_check.h

src/consensus/tx_verify.h

src/policy/feerate.h

src/policy/feerate.cpp

src/primitives/transaction_identifier.h

src/chainparamsbase.h

src/chainparamsbase.cpp

src/util/moneystr.cpp

src/crypto/ripemd160.h

src/crypto/sha1.h

src/crypto/sha512.h

src/crypto/hmac_sha256.h

src/crypto/hmac_sha512.h

src/crypto/hmac_sha256.cpp

src/crypto/hmac_sha512.cpp

src/crypto/hkdf_sha256_32.h

src/crypto/hkdf_sha256_32.cpp

src/support/cleanse.h

src/support/cleanse.cpp

src/crypto/siphash.cpp

src/crypto/muhash.h

src/crypto/chacha20.h

src/crypto/poly1305.h

src/crypto/chacha20poly1305.h

src/crypto/chacha20poly1305.cpp

src/util/chaintype.cpp

src/util/obfuscation.h

src/util/byte_units.h

src/util/overflow.h

src/blockencodings.cpp

src/net_permissions.cpp

src/policy/packages.cpp

src/policy/rbf.cpp

src/policy/truc_policy.cpp

src/policy/ephemeral_policy.cpp

src/policy/settings.cpp

src/policy/policy.cpp

src/node/transaction.cpp

src/node/coin.cpp

src/rpc/client.cpp

src/rpc/external_signer.cpp

src/rpc/request.cpp

src/rpc/server_util.cpp

src/rpc/fees.cpp

src/rpc/output_script.cpp

src/rpc/rawtransaction_util.cpp

src/rpc/rawtransaction_util.h

src/rpc/register.h

src/rpc/request.h

src/rpc/server_util.h

src/rpc/protocol.h

src/rpc/server.h

src/rpc/signmessage.cpp

src/rpc/txoutproof.cpp

src/rpc/util.cpp

src/rpc/util.h

src/wallet/rpc/addresses.cpp

src/wallet/rpc/backup.cpp

src/wallet/rpc/coins.cpp

src/wallet/rpc/encrypt.cpp

src/wallet/rpc/signmessage.cpp

src/wallet/rpc/util.cpp

src/wallet/rpc/util.h

src/wallet/coincontrol.cpp

src/wallet/coincontrol.h

src/wallet/context.cpp

src/wallet/context.h

src/wallet/crypter.cpp

src/wallet/crypter.h

src/wallet/db.cpp

src/wallet/export.cpp

src/wallet/external_signer_scriptpubkeyman.cpp

src/wallet/rpc/spend.cpp

src/wallet/rpc/transactions.cpp

src/wallet/rpc/wallet.cpp

src/wallet/feebumper.cpp

src/wallet/feebumper.h

src/index/base.h

src/index/base.cpp

src/index/txindex.h

src/index/txindex.cpp

src/index/txindex_key.h

src/index/txospenderindex.h

src/index/txospenderindex.cpp

src/index/blockfilterindex.h

src/index/blockfilterindex.cpp

src/index/coinstatsindex.h

src/index/coinstatsindex.cpp

src/index/db_key.h

src/index/disktxpos.h

src/kernel/chain.cpp

src/kernel/chain.h

src/kernel/checks.cpp

src/kernel/checks.h

src/kernel/context.cpp

src/kernel/context.h

src/kernel/cs_main.cpp

src/kernel/cs_main.h

src/kernel/disconnected_transactions.cpp

src/kernel/disconnected_transactions.h

src/kernel/mempool_removal_reason.cpp

src/kernel/mempool_removal_reason.h

src/kernel/coinstats.cpp

src/kernel/coinstats.h

src/kernel/chainparams.cpp

src/kernel/chainparams.h

src/wallet/sqlite.cpp

src/wallet/sqlite.h

src/wallet/transaction.cpp

src/wallet/transaction.h

src/wallet/dump.cpp

src/wallet/dump.h

src/wallet/init.cpp

src/wallet/walletutil.cpp

src/wallet/walletutil.h

src/wallet/wallettool.cpp

src/wallet/wallettool.h

src/wallet/export.h

src/wallet/migrate.cpp

src/wallet/migrate.h

src/wallet/db.h

src/wallet/walletdb.cpp

src/wallet/interfaces.cpp

src/wallet/scriptpubkeyman.cpp

src/wallet/scriptpubkeyman.h

src/kernel/bitcoinkernel.cpp

src/kernel/bitcoinkernel.h

src/kernel/bitcoinkernel_wrapper.h

src/node/chainstate.cpp

src/node/chainstate.h

src/node/blockstorage.cpp

src/node/blockstorage.h

src/node/mempool_persist.cpp

src/node/mempool_persist.h

src/node/utxo_snapshot.cpp

src/node/utxo_snapshot.h

src/node/kernel_notifications.cpp

src/node/kernel_notifications.h

src/node/blockmanager_args.cpp

src/kernel/blockmanager_opts.h

src/util/expected.cpp

src/policy/settings.h

src/util/types.h

src/kernel/messagestartchars.h

src/kernel/warning.h

src/util/exception.h

src/common/license_info.h

src/node/coins_view_args.h

src/node/database_args.h

src/util/batchpriority.h

src/util/ui_change_type.h

src/node/coins_view_args.cpp

src/node/peerman_args.h

src/util/serfloat.h

src/node/blockmanager_args.h

src/node/database_args.cpp

src/util/overloaded.h

src/interfaces/types.h

src/node/chainstatemanager_args.h

src/node/minisketchwrapper.h

src/util/macros.h

src/util/syserror.h

src/common/run_command.h

src/util/bytevectorhash.cpp

src/node/mempool_persist_args.cpp

src/util/exec.h

src/util/rbf.h

src/crypto/hex_base.h

src/node/mempool_persist_args.h

src/interfaces/echo.h

src/util/any.h

src/util/batchpriority.cpp

src/util/threadnames.h

src/node/coin.h

src/node/mempool_args.h

src/util/asmap.h

src/util/bytevectorhash.h

src/node/context.cpp

src/util/insert.h

src/util/readwritefile.h

src/node/peerman_args.cpp

src/node/interface_ui.cpp

src/interfaces/handler.h

src/node/mining_args.h

src/util/hasher.cpp

src/common/init.h

src/kernel/mempool_limits.h

src/common/system.h

src/crypto/sha3.h

src/util/threadinterrupt.cpp

src/node/protocol_version.h

src/util/exception.cpp

src/common/messages.h

src/node/connection_types.cpp

src/util/bip32.h

src/common/license_info.cpp

src/util/stdmutex.h

src/common/run_command.cpp

src/util/check.cpp

src/util/golombrice.h

src/node/types.h

src/node/timeoffsets.h

src/util/readwritefile.cpp

src/util/fastrange.h

src/util/signalinterrupt.h

src/util/task_runner.h

src/util/syserror.cpp

src/common/interfaces.cpp

src/common/types.h

src/util/threadinterrupt.h

src/kernel/chainstatemanager_opts.h

src/node/psbt.h

src/policy/ephemeral_policy.h

src/util/trace.h

src/common/url.cpp

src/kernel/mempool_options.h

src/util/serfloat.cpp

src/kernel/notifications_interface.h

src/node/timeoffsets.cpp

src/node/warnings.cpp

src/util/hash_type.h

src/crypto/hex_base.cpp

src/node/eviction.h

src/util/tokenbucket.h

src/crypto/aes.h

src/common/pcp.h

src/util/feefrac.cpp

src/node/transaction.h

src/util/threadnames.cpp

src/common/signmessage.h

src/util/exec.cpp

src/util/signalinterrupt.cpp

src/clientversion.cpp

src/common/signmessage.cpp

src/compat/assumptions.h

src/compat/byteswap.h

src/deploymentinfo.cpp

src/deploymentinfo.h

src/deploymentstatus.cpp

src/deploymentstatus.h

src/dummywallet.cpp

src/external_signer.h

src/init/bitcoin-gui.cpp

src/init/bitcoin-node.cpp

src/init/bitcoin-qt.cpp

src/init/bitcoin-wallet.cpp

src/init/bitcoind.cpp

src/init/common.h

src/interfaces/init.h

src/interfaces/ipc.h

src/key_io.h

src/logging/categories.h

src/logging/timer.h

src/mapport.h

src/musig.h

src/net_permissions.h

src/netgroup.h

src/netmessagemaker.h

src/node/chainstatemanager_args.cpp

src/node/connection_types.h

src/node/context.h

src/node/interface_ui.h

src/node/mempool_args.cpp

src/node/mining_args.cpp

src/node/minisketchwrapper.cpp

src/node/txreconciliation.h

src/policy/fees/estimator_args.cpp

src/policy/fees/estimator_args.h

src/policy/fees/estimator_man.cpp

src/policy/fees/estimator_man.h

src/policy/packages.h

src/policy/rbf.h

src/policy/truc_policy.h

src/pow.h

src/primitives/block.cpp

src/randomenv.h

src/rest.h

src/script/keyorigin.h

src/script/parsing.cpp

src/script/parsing.h

src/script/script_error.h

src/script/sigcache.cpp

src/script/sigcache.h

src/script/solver.h

src/script/verify_flags.h

src/semaphore_grant.h

src/signet.h

src/span.h

src/support/allocators/secure.h

src/support/allocators/zeroafterfree.h

src/util/tokenpipe.cpp

src/util/translation.h

src/util/vector.h

src/versionbits.h

src/versionbits_impl.h

src/wallet/external_signer_scriptpubkeyman.h

src/wallet/fees.h

src/wallet/load.h

src/wallet/receive.h

src/wallet/rpc/wallet.h

src/wallet/types.h

src/walletinitinterface.h

src/zmq/zmqabstractnotifier.cpp

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