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

Release published 2026-10-28 · Snapshot fetched 2026-11-01. Latest stable release at fetch time; development branches and Git history are excluded. Only the selected code window and visible folders load here.

bitcoin / bitcoinstable

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▤ addition_overflow.cpp

▤ base_encode_decode.cpp

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▤ crypto_aes256cbc.cpp

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▤ secp256k1_ec_seckey_import_export_der.cpp

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▤ txindex_tests.cpp

▤ txospenderindex_tests.cpp

▤ txpackage_tests.cpp

▤ txreconciliation_tests.cpp

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▤ txvalidation_tests.cpp

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▤ uint256_tests.cpp

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▤ arith_uint256.hGuide

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▤ bitcoin-cli-res.rc

▤ bitcoin-cli.cppGuide

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bitcoin / src / test / fuzz / txgraph.cpp

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751                    auto component = sel_sim.graph.GetConnectedComponent(sel_sim.graph.Positions(), simpos);
752                    // Remember the lowest-index SimPos in component, as a representative for it.
753                    assert(component.Any());
754                    sim_reps.Set(component.First());
755                }
756                // Compare the number of deduplicated representatives with the value returned by
757                // the real function.
758                assert(result == sim_reps.Count());
759                break;
760            } else if (command-- == 0) {
761                // DoWork.
762                uint64_t max_cost = provider.ConsumeIntegralInRange<uint64_t>(0, alt ? 10000 : 255);
763                bool ret = real->DoWork(max_cost);
764                uint64_t cost_for_optimal{0};
765                for (unsigned level = 0; level < sims.size(); ++level) {
766                    // DoWork() will not optimize oversized levels, or the main level if a builder
767                    // is present. Note that this impacts the DoWork() return value, as true means
768                    // that non-optimal clusters may remain within such oversized or builder-having
769                    // levels.
770                    if (sims[level].IsOversized()) continue;
771                    if (level == 0 && !block_builders.empty()) continue;
772                    // If neither of the two above conditions holds, and DoWork() returned true,
773                    // then the level is optimal.
774                    if (ret) {
775                        sims[level].real_is_optimal = true;
776                    }
777                    // Compute how much work would be needed to make everything optimal.
778                    for (auto component : sims[level].GetComponents()) {
779                        auto cost_opt_this_cluster = MaxOptimalLinearizationCost(component.Count());
780                        if (cost_opt_this_cluster > acceptable_cost) {
781                            // If the amount of work required to linearize this cluster
782                            // optimally exceeds acceptable_cost, DoWork() may process it in two
783                            // stages: once to acceptable, and once to optimal.
784                            cost_for_optimal += cost_opt_this_cluster + acceptable_cost;
785                        } else {
786                            cost_for_optimal += cost_opt_this_cluster;
787                        }
788                    }
789                }
790                if (!ret) {
791                    // DoWork can only have more work left if the requested amount of work
792                    // was insufficient to linearize everything optimally within the levels it is
793                    // allowed to touch.
794                    assert(max_cost <= cost_for_optimal);
795                }
796                break;
797            } else if (sims.size() == 2 && !sims[0].IsOversized() && !sims[1].IsOversized() && command-- == 0) {
798                // GetMainStagingDiagrams()
799                auto [real_main_diagram, real_staged_diagram] = real->GetMainStagingDiagrams();
800                auto real_sum_main = std::accumulate(real_main_diagram.begin(), real_main_diagram.end(), FeeFrac{});
801                auto real_sum_staged = std::accumulate(real_staged_diagram.begin(), real_staged_diagram.end(), FeeFrac{});
802                auto real_gain = real_sum_staged - real_sum_main;
803                auto sim_gain = sims[1].SumAll() - sims[0].SumAll();
804                // Just check that the total fee gained/lost and size gained/lost according to the
805                // diagram matches the difference in these values in the simulated graph. A more
806                // complete check of the GetMainStagingDiagrams result is performed at the end.
807                assert(sim_gain == real_gain);
808                // Check that the feerates in each diagram are monotonically decreasing.
809                for (size_t i = 1; i < real_main_diagram.size(); ++i) {
810                    assert(ByRatio{real_main_diagram[i]} <= ByRatio{real_main_diagram[i - 1]});
811                }
812                for (size_t i = 1; i < real_staged_diagram.size(); ++i) {
813                    assert(ByRatio{real_staged_diagram[i]} <= ByRatio{real_staged_diagram[i - 1]});
814                }
815                break;
816            } else if (block_builders.size() < 4 && !main_sim.IsOversized() && command-- == 0) {
817                // GetBlockBuilder.
818                block_builders.emplace_back(real->GetBlockBuilder());
819                break;
820            } else if (!block_builders.empty() && command-- == 0) {
821                // ~BlockBuilder.
822                block_builders.erase(block_builders.begin() + builder_idx);
823                break;
824            } else if (!block_builders.empty() && command-- == 0) {
825                // BlockBuilder::GetCurrentChunk, followed by Include/Skip.
826                auto& builder_data = block_builders[builder_idx];
827                auto new_included = builder_data.included;
828                auto new_done = builder_data.done;
829                auto chunk = builder_data.builder->GetCurrentChunk();
830                if (chunk) {
831                    // Chunk feerates must be monotonously decreasing.
832                    if (!builder_data.last_feerate.IsEmpty()) {
833                        assert(ByRatio{chunk->second} <= ByRatio{builder_data.last_feerate});
834                    }
835                    builder_data.last_feerate = chunk->second;
836                    // Verify the contents of GetCurrentChunk.
837                    FeePerWeight sum_feerate;
838                    for (TxGraph::Ref* ref : chunk->first) {
839                        // Each transaction in the chunk must exist in the main graph.
840                        auto simpos = main_sim.Find(ref);
841                        assert(simpos != SimTxGraph::MISSING);
842                        // Verify the claimed chunk feerate.
843                        sum_feerate += main_sim.graph.FeeRate(simpos);
844                        // Make sure no transaction is reported twice.
845                        assert(!new_done[simpos]);
846                        new_done.Set(simpos);
847                        // The concatenation of all included transactions must be topologically valid.
848                        new_included.Set(simpos);
849                        assert(main_sim.graph.Ancestors(simpos).IsSubsetOf(new_included));
850                    }
851                    assert(sum_feerate == chunk->second);
852                } else {
853                    // When we reach the end, if nothing was skipped, the entire graph should have
854                    // been reported.
855                    if (builder_data.done == builder_data.included) {
856                        assert(builder_data.done.Count() == main_sim.GetTransactionCount());
857                    }
858                }
859                // Possibly invoke GetCurrentChunk() again, which should give the same result.
860                if ((orig_command % 7) >= 5) {
861                    auto chunk2 = builder_data.builder->GetCurrentChunk();
862                    assert(chunk == chunk2);
863                }
864                // Skip or include.
865                if ((orig_command % 5) >= 3) {
866                    // Skip.
867                    builder_data.builder->Skip();
868                } else {
869                    // Include.
870                    builder_data.builder->Include();
871                    builder_data.included = new_included;
872                }
873                builder_data.done = new_done;
874                break;
875            } else if (!main_sim.IsOversized() && command-- == 0) {
876                // GetWorstMainChunk.
877                auto [worst_chunk, worst_chunk_feerate] = real->GetWorstMainChunk();
878                // Just do some sanity checks here. Consistency with GetBlockBuilder is checked
879                // below.
880                if (main_sim.GetTransactionCount() == 0) {
881                    assert(worst_chunk.empty());
882                    assert(worst_chunk_feerate.IsEmpty());
883                } else {
884                    assert(!worst_chunk.empty());
885                    SimTxGraph::SetType done;
886                    FeePerWeight sum;
887                    for (TxGraph::Ref* ref : worst_chunk) {
888                        // Each transaction in the chunk must exist in the main graph.
889                        auto simpos = main_sim.Find(ref);
890                        assert(simpos != SimTxGraph::MISSING);
891                        sum += main_sim.graph.FeeRate(simpos);
892                        // Make sure the chunk contains no duplicate transactions.
893                        assert(!done[simpos]);
894                        done.Set(simpos);
895                        // All elements are preceded by all their descendants.
896                        assert(main_sim.graph.Descendants(simpos).IsSubsetOf(done));
897                    }
898                    assert(sum == worst_chunk_feerate);
899                }
900                break;
901            } else if ((block_builders.empty() || sims.size() > 1) && command-- == 0) {
902                // Trim.
903                bool was_oversized = top_sim.IsOversized();
904                auto removed = real->Trim();
905                // Verify that something was removed if and only if there was an oversized cluster.
906                assert(was_oversized == !removed.empty());
907                if (!was_oversized) break;
908                auto removed_set = top_sim.MakeSet(removed);
909                // The removed set must contain all its own descendants.
910                for (auto simpos : removed_set) {
911                    assert(top_sim.graph.Descendants(simpos).IsSubsetOf(removed_set));
912                }
913                // Something from every oversized cluster should have been removed, and nothing
914                // else.
915                assert(top_sim.MatchesOversizedClusters(removed_set));
916
917                // Apply all removals to the simulation, and verify the result is no longer
918                // oversized. Don't query the real graph for oversizedness; it is compared
919                // against the simulation anyway later.
920                for (auto simpos : removed_set) {
921                    top_sim.RemoveTransaction(top_sim.GetRef(simpos));
922                }
923                assert(!top_sim.IsOversized());
924                break;
925            } else if ((block_builders.empty() || sims.size() > 1) &&
926                       top_sim.GetTransactionCount() > max_cluster_count && !top_sim.IsOversized() && command-- == 0) {
927                // Trim (special case which avoids apparent cycles in the implicit approximate
928                // dependency graph constructed inside the Trim() implementation). This is worth
929                // testing separately, because such cycles cannot occur in realistic scenarios,
930                // but this is hard to replicate in general in this fuzz test.
931
932                // First, we need to have dependencies applied and linearizations fixed to avoid
933                // circular dependencies in implied graph; trigger it via whatever means.
934                real->CountDistinctClusters({}, TxGraph::Level::TOP);
935
936                // Gather the current clusters.
937                auto clusters = top_sim.GetComponents();
938
939                // Merge clusters randomly until at least one oversized one appears.
940                bool made_oversized = false;
941                auto merges_left = clusters.size() - 1;
942                while (merges_left > 0) {
943                    --merges_left;
944                    // Find positions of clusters in the clusters vector to merge together.
945                    auto par_cl = rng.randrange(clusters.size());
946                    auto chl_cl = rng.randrange(clusters.size() - 1);
947                    chl_cl += (chl_cl >= par_cl);
948                    Assume(chl_cl != par_cl);
949                    // Add between 1 and 3 dependencies between them. As all are in the same
950                    // direction (from the child cluster to parent cluster), no cycles are possible,
951                    // regardless of what internal topology Trim() uses as approximation within the
952                    // clusters.
953                    int num_deps = rng.randrange(3) + 1;
954                    for (int i = 0; i < num_deps; ++i) {
955                        // Find a parent transaction in the parent cluster.
956                        auto par_idx = rng.randrange(clusters[par_cl].Count());
957                        SimTxGraph::Pos par_pos = 0;
958                        for (auto j : clusters[par_cl]) {
959                            if (par_idx == 0) {
960                                par_pos = j;
961                                break;
962                            }
963                            --par_idx;
964                        }
965                        // Find a child transaction in the child cluster.
966                        auto chl_idx = rng.randrange(clusters[chl_cl].Count());
967                        SimTxGraph::Pos chl_pos = 0;
968                        for (auto j : clusters[chl_cl]) {
969                            if (chl_idx == 0) {
970                                chl_pos = j;
971                                break;
972                            }
973                            --chl_idx;
974                        }
975                        // Add dependency to both simulation and real TxGraph.
976                        auto par_ref = top_sim.GetRef(par_pos);
977                        auto chl_ref = top_sim.GetRef(chl_pos);
978                        top_sim.AddDependency(par_ref, chl_ref);
979                        real->AddDependency(*par_ref, *chl_ref);
980                    }
981                    // Compute the combined cluster.
982                    auto par_cluster = clusters[par_cl];
983                    auto chl_cluster = clusters[chl_cl];
984                    auto new_cluster = par_cluster | chl_cluster;
985                    // Remove the parent and child cluster from clusters.
986                    std::erase_if(clusters, [&](const auto& cl) noexcept { return cl == par_cluster || cl == chl_cluster; });
987                    // Add the combined cluster.
988                    clusters.push_back(new_cluster);
989                    // If this is the first merge that causes an oversized cluster to appear, pick
990                    // a random number of further merges to appear.
991                    if (!made_oversized) {
992                        made_oversized = new_cluster.Count() > max_cluster_count;
993                        if (!made_oversized) {
994                            FeeFrac total;
995                            for (auto i : new_cluster) total += top_sim.graph.FeeRate(i);
996                            if (uint32_t(total.size) > max_cluster_size) made_oversized = true;
997                        }
998                        if (made_oversized) merges_left = rng.randrange(clusters.size());
999                    }
1000                }

A READING COMPANION

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This file is included in the stable source snapshot. A file-specific guide has not been published yet.

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 4Next 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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