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▤ cluster_linearize.h

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bitcoin / src / test / util / cluster_linearize.h

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251                } else {
252                    // Append diff - total_size holes at the end, plus the new transaction.
253                    total_size = diff;
254                    reordering.push_back(total_size++);
255                }
256            } else {
257                // In case total_size == SetType::Size, it is not possible to insert the new
258                // transaction without exceeding SetType's size. Instead, interpret diff as an
259                // index into the holes, and overwrite a position there. This branch is never used
260                // when deserializing the output of the serializer, but gives meaning to otherwise
261                // invalid input.
262                diff %= (SetType::Size() - reordering.size());
263                SetType holes = SetType::Fill(SetType::Size());
264                for (auto pos : reordering) holes.Reset(pos);
265                for (auto pos : holes) {
266                    if (diff == 0) {
267                        reordering.push_back(pos);
268                        break;
269                    }
270                    --diff;
271                }
272            }
273            // Stop if a read error was encountered during deserialization.
274            if (read_error) break;
275        }
276
277        // Construct the original cluster order depgraph.
278        depgraph = DepGraph(topo_depgraph, reordering, total_size);
279    }
280};
281
282/** Perform a sanity/consistency check on a DepGraph. */
283template<typename SetType>
284void SanityCheck(const DepGraph<SetType>& depgraph)
285{
286    // Verify Positions and PositionRange consistency.
287    DepGraphIndex num_positions{0};
288    DepGraphIndex position_range{0};
289    for (DepGraphIndex i : depgraph.Positions()) {
290        ++num_positions;
291        position_range = i + 1;
292    }
293    assert(num_positions == depgraph.TxCount());
294    assert(position_range == depgraph.PositionRange());
295    assert(position_range >= num_positions);
296    assert(position_range <= SetType::Size());
297    // Consistency check between ancestors internally.
298    for (DepGraphIndex i : depgraph.Positions()) {
299        // Transactions include themselves as ancestors.
300        assert(depgraph.Ancestors(i)[i]);
301        // If a is an ancestor of b, then b's ancestors must include all of a's ancestors.
302        for (auto a : depgraph.Ancestors(i)) {
303            assert(depgraph.Ancestors(i).IsSupersetOf(depgraph.Ancestors(a)));
304        }
305    }
306    // Consistency check between ancestors and descendants.
307    for (DepGraphIndex i : depgraph.Positions()) {
308        for (DepGraphIndex j : depgraph.Positions()) {
309            assert(depgraph.Ancestors(i)[j] == depgraph.Descendants(j)[i]);
310        }
311        // No transaction is a parent or child of itself.
312        auto parents = depgraph.GetReducedParents(i);
313        auto children = depgraph.GetReducedChildren(i);
314        assert(!parents[i]);
315        assert(!children[i]);
316        // Parents of a transaction do not have ancestors inside those parents (except itself).
317        // Note that even the transaction itself may be missing (if it is part of a cycle).
318        for (auto parent : parents) {
319            assert((depgraph.Ancestors(parent) & parents).IsSubsetOf(SetType::Singleton(parent)));
320        }
321        // Similar for children and descendants.
322        for (auto child : children) {
323            assert((depgraph.Descendants(child) & children).IsSubsetOf(SetType::Singleton(child)));
324        }
325    }
326    if (depgraph.IsAcyclic()) {
327        // If DepGraph is acyclic, serialize + deserialize must roundtrip.
328        std::vector<unsigned char> ser;
329        VectorWriter writer(ser, 0);
330        writer << Using<DepGraphFormatter>(depgraph);
331        SpanReader reader(ser);
332        DepGraph<SetType> decoded_depgraph;
333        reader >> Using<DepGraphFormatter>(decoded_depgraph);
334        assert(depgraph == decoded_depgraph);
335        assert(reader.empty());
336        // It must also deserialize correctly without the terminal 0 byte (as the deserializer
337        // will upon EOF still return what it read so far).
338        assert(ser.size() >= 1 && ser.back() == 0);
339        ser.pop_back();
340        reader = SpanReader{ser};
341        decoded_depgraph = {};
342        reader >> Using<DepGraphFormatter>(decoded_depgraph);
343        assert(depgraph == decoded_depgraph);
344        assert(reader.empty());
345
346        // In acyclic graphs, the union of parents with parents of parents etc. yields the
347        // full ancestor set (and similar for children and descendants).
348        std::vector<SetType> parents(depgraph.PositionRange()), children(depgraph.PositionRange());
349        for (DepGraphIndex i : depgraph.Positions()) {
350            parents[i] = depgraph.GetReducedParents(i);
351            children[i] = depgraph.GetReducedChildren(i);
352        }
353        for (auto i : depgraph.Positions()) {
354            // Initialize the set of ancestors with just the current transaction itself.
355            SetType ancestors = SetType::Singleton(i);
356            // Iteratively add parents of all transactions in the ancestor set to itself.
357            while (true) {
358                const auto old_ancestors = ancestors;
359                for (auto j : ancestors) ancestors |= parents[j];
360                // Stop when no more changes are being made.
361                if (old_ancestors == ancestors) break;
362            }
363            assert(ancestors == depgraph.Ancestors(i));
364
365            // Initialize the set of descendants with just the current transaction itself.
366            SetType descendants = SetType::Singleton(i);
367            // Iteratively add children of all transactions in the descendant set to itself.
368            while (true) {
369                const auto old_descendants = descendants;
370                for (auto j : descendants) descendants |= children[j];
371                // Stop when no more changes are being made.
372                if (old_descendants == descendants) break;
373            }
374            assert(descendants == depgraph.Descendants(i));
375        }
376    }
377}
378
379/** Perform a sanity check on a linearization. */
380template<typename SetType>
381void SanityCheck(const DepGraph<SetType>& depgraph, std::span<const DepGraphIndex> linearization)
382{
383    // Check completeness.
384    assert(linearization.size() == depgraph.TxCount());
385    SetType done;
386    for (auto i : linearization) {
387        // Check transaction position is in range.
388        assert(depgraph.Positions()[i]);
389        // Check topology and lack of duplicates.
390        assert((depgraph.Ancestors(i) - done) == SetType::Singleton(i));
391        done.Set(i);
392    }
393}
394
395inline uint64_t MaxOptimalLinearizationCost(DepGraphIndex cluster_count)
396{
397    // These are the largest numbers seen returned as cost by Linearize(), in a large randomized
398    // trial. There exist almost certainly far worse cases, but they are unlikely to be
399    // encountered in randomized tests. The purpose of these numbers is guaranteeing that for
400    // *some* reasonable cost bound, optimal linearizations are always found.
401    static constexpr uint64_t COSTS[65] = {
402        0,
403        0, 545, 928, 1633, 2647, 4065, 5598, 8258,
404        9505, 11471, 14137, 19553, 20460, 26191, 28397, 32599,
405        41631, 47419, 56329, 57767, 72196, 63652, 95366, 96537,
406        115653, 125407, 131734, 145090, 156349, 164665, 194224, 203953,
407        207710, 225878, 239971, 252284, 256534, 222142, 251332, 357098,
408        325788, 295867, 410053, 497483, 533892, 576572, 577845, 572400,
409        592536, 455082, 609249, 659130, 714091, 544507, 718788, 562378,
410        601926, 1025081, 732725, 708896, 738224, 900445, 1092519, 1139946
411    };
412    assert(cluster_count < std::size(COSTS));
413    // Multiply the table number by two, to account for the fact that they are not absolutes.
414    return COSTS[cluster_count] * 2;
415}
416
417} // namespace cluster_linearize
418
419#endif // BITCOIN_TEST_UTIL_CLUSTER_LINEARIZE_H
420

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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 2

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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