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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

▤ block_index_tree.cpp

▤ block_index.cpp

▤ block_policy_estimator.cpp

▤ cluster_linearize.cpp

▤ crypto_aes256cbc.cpp

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▤ crypto_hkdf_hmac_sha256_l32.cpp

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▤ descriptor_parse.cpp

▤ deserialize.cpp

▤ difference_formatter.cpp

▤ FuzzedDataProvider.h

▤ load_external_block_file.cpp

▤ multiplication_overflow.cpp

▤ net_permissions.cpp

▤ net.cpp

▤ netaddress.cpp

▤ netbase_dns_lookup.cpp

▤ node_eviction.cpp

▤ overflow.cpp

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▤ script.cpp

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▤ secp256k1_ec_seckey_import_export_der.cpp

▤ secp256k1_ecdsa_signature_parse_der_lax.cpp

▤ signature_checker.cpp

▤ utxo_total_supply.cpp

▤ validation_load_mempool.cpp

▤ allocator_tests.cpp

▤ amount_tests.cpp

▤ argsman_tests.cpp

▤ arith_uint256_tests.cpp

▤ baseindex_tests.cpp

▤ blockchain_tests.cpp

▤ blockencodings_tests.cpp

▤ blockfilter_index_tests.cpp

▤ blockfilter_tests.cpp

▤ blockmanager_tests.cpp

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▤ bloom_tests.cpp

▤ bswap_tests.cpp

▤ btcsignals_tests.cpp

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▤ CMakeLists.txt

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▤ dbwrapper_tests.cpp

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▤ feerounder_tests.cpp

▤ fees_util_tests.cpp

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▤ translation_tests.cpp

▤ txdownload_tests.cpp

▤ txgraph_tests.cpp

▤ txindex_tests.cpp

▤ txospenderindex_tests.cpp

▤ txpackage_tests.cpp

▤ txreconciliation_tests.cpp

▤ txrequest_tests.cpp

▤ txvalidation_tests.cpp

▤ txvalidationcache_tests.cpp

▤ uint256_tests.cpp

▤ util_check_tests.cpp

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▤ validation_block_tests.cpp

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▤ validation_chainstatemanager_tests.cpp

▤ validation_flush_tests.cpp

▤ validation_tests.cpp

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▤ versionbits_tests.cpp

▤ arith_uint256.hGuide

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▤ bitcoin-cli-res.rc

▤ bitcoin-cli.cppGuide

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▤ libbitcoinkernel.pc.in

bitcoin / src / test / fuzz / connect_block.cpp

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251    options.coinbase_output_script = P2WSH_OP_TRUE;
252    MineBlock(g_setup->m_node, options);
253    Assert(g_setup->m_node.chainman->ActiveChainstate().GetMempool()->size() == 0);
254
255    // Load the 201st block into g_blocks.
256    LOCK(::cs_main);
257    auto& chainstate = Assert(g_setup->m_node.chainman)->ActiveChainstate();
258    auto current_block = chainstate.m_chain.Tip();
259    LoadCurrentBlock(chainstate, current_block);
260}
261
262/**
263 * Read one transaction from the fuzzing input through the FuzzedDataProvider.
264 * It is intended to leave more space to craft complex transactions, especially
265 * with various script types (P2SH, P2WSH, TAPROOT, NOSCRIPT).
266 * It is exclusively used by ConsumeBlock to read transactions inside a block.
267 */
268CTransactionRef ConsumeTransaction(FuzzedDataProvider& fuzzed_data_provider,
269                                   std::vector<CTxIn>& additional_txins,
270                                   bool coinbase = false,
271                                   int target_height = 0)
272{
273    CMutableTransaction tx;
274    tx.version = fuzzed_data_provider.ConsumeBool() ?
275                     CTransaction::CURRENT_VERSION :
276                     fuzzed_data_provider.ConsumeIntegral<uint32_t>();
277    tx.nLockTime = fuzzed_data_provider.ConsumeBool() ?
278                       0 :
279                       fuzzed_data_provider.ConsumeIntegral<uint32_t>();
280
281    // Some harnesses want to explicitly read coinbase transactions from input.
282    if (coinbase) {
283        // vin size is hardcoded.
284        tx.vin.resize(1);
285        tx.vin[0].prevout.SetNull();
286        if (fuzzed_data_provider.ConsumeBool()) {
287            // 1/2 probability of a valid vin.
288            tx.vin[0].scriptSig = CScript() << target_height;
289        } else {
290            // Read arbitrary data from input as scriptSig.
291            auto script_sig = ConsumeRandomLengthByteVector<unsigned char>(fuzzed_data_provider, 100);
292            tx.vin[0].scriptSig.assign(script_sig.begin(), script_sig.end());
293        }
294    } else {
295        // Read a normal transaction, with up to 10 inputs.
296        int num_inputs = fuzzed_data_provider.ConsumeIntegralInRange<int>(0, 10);
297        tx.vin.resize(num_inputs);
298        for (int i = 0; i < num_inputs; i++) {
299            // Read an integer to choose a CTxIn or reuse one generated by the
300            // input. The content of the CTxIn is not read from the input per se.
301            uint32_t input_index = fuzzed_data_provider.ConsumeIntegralInRange<uint32_t>(0, g_spend_candidate_txins.size() + additional_txins.size() - 1);
302            if (input_index < g_spend_candidate_txins.size()) {
303                // Pick it from the spend candidates.
304                tx.vin[i] = g_spend_candidate_txins[input_index];
305            } else {
306                // Pick it in the additional_txins set.
307                Assert((input_index - g_spend_candidate_txins.size()) < additional_txins.size());
308                tx.vin[i] = additional_txins[input_index - g_spend_candidate_txins.size()];
309            }
310
311            // Enable the fuzzer to mutate every CTxIn field after it is taken
312            // from the spend candidates.
313            if (fuzzed_data_provider.ConsumeBool()) {
314                tx.vin[i].nSequence = ConsumeSequence(fuzzed_data_provider);
315            }
316            if (fuzzed_data_provider.ConsumeBool()) {
317                tx.vin[i].prevout.n = fuzzed_data_provider.ConsumeIntegral<uint32_t>();
318            }
319            if (fuzzed_data_provider.ConsumeBool()) {
320                tx.vin[i].prevout.hash = Txid::FromUint256(ConsumeUInt256(fuzzed_data_provider));
321            }
322            if (fuzzed_data_provider.ConsumeBool()) {
323                tx.vin[i].scriptSig = ConsumeScript(fuzzed_data_provider);
324            }
325            if (fuzzed_data_provider.ConsumeBool()) {
326                tx.vin[i].scriptWitness.stack.clear();
327                int num_wit = fuzzed_data_provider.ConsumeIntegralInRange<int>(0, 10);
328                for (int j = 0; j < num_wit; j++) {
329                    tx.vin[i].scriptWitness.stack.push_back(ConsumeRandomLengthByteVector<unsigned char>(fuzzed_data_provider, 100));
330                }
331            }
332        }
333    }
334
335    // Read outputs.
336    int num_outputs = fuzzed_data_provider.ConsumeIntegralInRange<int>(1, 10);
337    tx.vout.resize(num_outputs);
338    for (int i = 0; i < num_outputs; i++) {
339        // Read CAmount to spend.
340        tx.vout[i].nValue = fuzzed_data_provider.ConsumeIntegralInRange<CAmount>(-10, 50 * COIN + 10);
341
342        // Read scriptPubKey type into one of the valid types.
343        CallOneOf(
344            fuzzed_data_provider,
345            [&] {
346                // P2WSH
347                tx.vout[i].scriptPubKey = P2WSH_OP_TRUE;
348            },
349            [&] {
350                // P2SH
351                tx.vout[i].scriptPubKey = P2SH_OP_TRUE;
352            },
353            [&] {
354                // Taproot
355                tx.vout[i].scriptPubKey = TAPROOT_OP_TRUE;
356            },
357            [&] {
358                // Empty script
359                tx.vout[i].scriptPubKey = CScript();
360            },
361            [&] {
362                // Read arbitrary scriptPubKey.
363                tx.vout[i].scriptPubKey = ConsumeScript(fuzzed_data_provider);
364            });
365    }
366
367    // Create the shared pointer to the CTransaction object.
368    auto res = MakeTransactionRef(tx);
369
370    if (!coinbase) {
371        // Create spending scripts for CTxOuts so they can be spent in later
372        // transactions. Do it here as the transaction hash is definitive.
373        for (int i = 0; i < num_outputs; i++) {
374            MaybeAddSpendCandidate(additional_txins, *res, i);
375        }
376    }
377
378    return res;
379}
380
381/**
382 * Consume a block from the fuzzing input.
383 * It builds a block on top of the given prev_block.
384 */
385CBlock ConsumeBlock(FuzzedDataProvider& fuzzed_data_provider, const CBlock& prev_block, int target_height,
386                    std::vector<CTxIn>& additional_txins)
387{
388    CBlock block;
389
390    // Initialize header fields.
391    block.nVersion = g_blocks.back()->nVersion;
392    block.hashPrevBlock = prev_block.GetHash();
393    block.nTime = g_blocks.back()->nTime + 2;
394    block.nBits = g_blocks.back()->nBits;
395
396    // Give the fuzzer input the ability to mutate block header fields.
397    if (fuzzed_data_provider.ConsumeBool()) {
398        block.nVersion = fuzzed_data_provider.ConsumeIntegral<int32_t>();
399    }
400    if (fuzzed_data_provider.ConsumeBool()) {
401        block.hashPrevBlock = ConsumeUInt256(fuzzed_data_provider);
402    }
403
404    if (fuzzed_data_provider.ConsumeBool()) {
405        block.nTime = fuzzed_data_provider.ConsumeIntegral<uint32_t>();
406    }
407    if (fuzzed_data_provider.ConsumeBool()) {
408        block.nBits = fuzzed_data_provider.ConsumeIntegral<uint32_t>();
409    }
410
411    // Read the coinbase transaction from the input.
412    block.vtx.push_back(ConsumeTransaction(fuzzed_data_provider, additional_txins, true, target_height));
413
414    // Read up to num_tx transactions from the input.
415    int num_tx = fuzzed_data_provider.ConsumeIntegralInRange<int>(0, 5);
416    for (int i = 0; i < num_tx; i++) {
417        block.vtx.push_back(ConsumeTransaction(fuzzed_data_provider, additional_txins));
418    }
419
420    // Commit witness.
421    if (fuzzed_data_provider.ConsumeBool()) {
422        g_setup->m_node.chainman->GenerateCoinbaseCommitment(block, nullptr);
423    }
424
425    // Set hashMerkleRoot to expected value.
426    block.hashMerkleRoot = BlockMerkleRoot(block);
427    // Let the fuzzer mutate hashMerkleRoot.
428    if (fuzzed_data_provider.ConsumeBool()) {
429        block.hashMerkleRoot = ConsumeUInt256(fuzzed_data_provider);
430    }
431
432    // Read the nonce from the input.
433    block.nNonce = fuzzed_data_provider.ConsumeIntegral<uint32_t>();
434
435    return block;
436}
437
438
439FUZZ_TARGET(connect_block, .init = initialize_connect_block)
440{
441    SeedRandomStateForTest(SeedRand::ZEROS);
442    FuzzedDataProvider fuzzed_data_provider(buffer.data(), buffer.size());
443    FakeNodeClock clock{g_blocks.back()->Time() + 2s};
444
445    LOCK(::cs_main);
446    g_setup->m_node.chainman->m_validation_cache.m_script_execution_cache.TestOnlyReset();
447    Chainstate& active_chainstate = g_setup->m_node.chainman->ActiveChainstate();
448    CBlockIndex* active_tip = active_chainstate.m_chain.Tip();
449    Assert(active_tip->GetBlockHash() == g_blocks.back()->GetHash());
450    CCoinsViewCache active_coins(&active_chainstate.CoinsTip());
451
452    // Read a new block from the data provider.
453    std::vector<CTxIn> additional_txins;
454    CBlock block = ConsumeBlock(fuzzed_data_provider, *g_blocks.back(), active_tip->nHeight + 1, additional_txins);
455
456    // Duplicate a transaction (not the coinbase) from the previous block
457    // to hit the BIP30 check.
458    if (fuzzed_data_provider.ConsumeBool()) {
459        const auto& duplicates = g_blocks.back()->vtx;
460        block.vtx.push_back(duplicates[fuzzed_data_provider.ConsumeIntegralInRange<size_t>(1, duplicates.size() - 1)]);
461    }
462
463    // Compute new CBlockIndex object.
464    uint256 current_hash = block.GetHash();
465    CBlockIndex new_index(block);
466    new_index.pprev = active_tip;
467    new_index.nHeight = active_tip->nHeight + 1;
468    new_index.phashBlock = &current_hash;
469
470    // Try to connect the block.
471    BlockValidationState state;
472    bool connected = active_chainstate.ConnectBlock(block,
473                                                    state,
474                                                    &new_index,
475                                                    active_coins,
476                                                    /*fJustCheck=*/true);
477    Assert(connected == state.IsValid());
478}
479
480} // namespace
481

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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 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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