BITCOIN MAINNETLive explorer status

Explorer Mempool Feed Forum Visualizer Receipts Tools Learn Code

Inside Bitcoin

Opening the selected file…

₿MyBitcoinExplorer

Bitcoin, in focus.
Explore the network. Understand the connections.

Explore Bitcoin with clarity.

READ THE CODE

Inside Bitcoin

The code behind the network, with room to understand it.

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

Find a file

▤ bip340_test_vectors.csv

▤ combined_log_template.html

▤ create_cache.py

▤ example_test.py

▤ feature_abortnode.py

▤ feature_addrman.py

▤ feature_anchors.py

▤ feature_asmap.py

▤ feature_assumeutxo.py

▤ feature_assumevalid.py

▤ feature_bind_extra.py

▤ feature_bind_port_discover.py

▤ feature_bind_port_externalip.py

▤ feature_bip68_sequence.py

▤ feature_block.py

▤ feature_blocksdir.py

▤ feature_blocksxor.py

▤ feature_chain_tiebreaks.py

▤ feature_cltv.py

▤ feature_coinstatsindex_compatibility.py

▤ feature_coinstatsindex.py

▤ feature_config_args.py

▤ feature_csv_activation.py

▤ feature_dbcrash.py

▤ feature_dersig.py

▤ feature_dirsymlinks.py

▤ feature_discover.py

▤ feature_fastprune.py

▤ feature_fee_estimation.py

▤ feature_filelock.py

▤ feature_framework_miniwallet.py

▤ feature_framework_startup_failures.py

▤ feature_framework_testshell.py

▤ feature_framework_unit_tests.py

▤ feature_help.py

▤ feature_includeconf.py

▤ feature_index_prune.py

▤ feature_init.py

▤ feature_loadblock.py

▤ feature_logging.py

▤ feature_maxtipage.py

▤ feature_maxuploadtarget.py

▤ feature_minchainwork.py

▤ feature_notifications.py

▤ feature_nulldummy.py

▤ feature_port.py

▤ feature_posix_fs_permissions.py

▤ feature_presegwit_node_upgrade.py

▤ feature_proxy.py

▤ feature_prune_stale_fork.py

▤ feature_pruning.py

▤ feature_rbf.py

▤ feature_reindex_init.py

▤ feature_reindex_readonly.py

▤ feature_reindex.py

▤ feature_remove_pruned_files_on_startup.py

▤ feature_segwit.py

▤ feature_settings.py

▤ feature_shutdown.py

▤ feature_signet.py

▤ feature_startupnotify.py

▤ feature_taproot.py

▤ feature_torcontrol.py

▤ feature_txindex_compatibility.py

▤ feature_uacomment.py

▤ feature_unsupported_utxo_db.py

▤ feature_utxo_abort_on_error.py

▤ feature_utxo_set_hash.py

▤ feature_versionbits_warning.py

▤ interface_bitcoin_cli.py

▤ interface_gui.py

▤ interface_http.py

▤ interface_ipc_cli.py

▤ interface_ipc_mining.py

▤ interface_ipc.py

▤ interface_rest.py

▤ interface_rpc.py

▤ interface_usdt_coinselection.py

▤ interface_usdt_mempool.py

▤ interface_usdt_net.py

▤ interface_usdt_utxocache.py

▤ interface_usdt_validation.py

▤ interface_zmq.py

▤ mempool_accept_wtxid.py

▤ mempool_accept.py

▤ mempool_cluster.py

▤ mempool_compatibility.py

▤ mempool_datacarrier.py

▤ mempool_dust.py

▤ mempool_ephemeral_dust.py

▤ mempool_expiry.py

▤ mempool_limit.py

▤ mempool_package_limits.py

▤ mempool_package_rbf.py

▤ mempool_packages.py

▤ mempool_persist.py

▤ mempool_reorg.py

▤ mempool_resurrect.py

▤ mempool_sigoplimit.py

▤ mempool_spend_coinbase.py

▤ mempool_truc.py

▤ mempool_unbroadcast.py

▤ mempool_updatefromblock.py

▤ mining_basic.py

▤ mining_getblocktemplate_longpoll.py

▤ mining_mainnet.py

▤ mining_prioritisetransaction.py

▤ mining_template_verification.py

▤ p2p_1p1c_network.py

▤ p2p_add_connections.py

▤ p2p_addr_relay.py

▤ p2p_addr_selfannouncement.py

▤ p2p_addrfetch.py

▤ p2p_addrv2_relay.py

▤ p2p_bip434_feature.py

▤ p2p_block_sync.py

▤ p2p_blockfilters.py

▤ p2p_blocksonly.py

▤ p2p_compactblocks_blocksonly.py

▤ p2p_compactblocks_hb.py

▤ p2p_compactblocks.py

▤ p2p_connection_limits.py

▤ p2p_disconnect_ban.py

▤ p2p_getaddr_caching.py

▤ p2p_getdata.py

▤ p2p_handshake.py

▤ p2p_headers_sync_with_minchainwork.py

▤ p2p_i2p_ports.py

▤ p2p_i2p_sessions.py

▤ p2p_ibd_stalling.py

▤ p2p_ibd_txrelay.py

▤ p2p_initial_headers_sync.py

▤ p2p_invalid_block.py

▤ p2p_invalid_locator.py

▤ p2p_invalid_messages.py

▤ p2p_invalid_tx.py

▤ p2p_leak_tx.py

▤ p2p_leak.py

▤ p2p_message_capture.py

▤ p2p_mutated_blocks.py

▤ p2p_net_deadlock.py

▤ p2p_nobloomfilter_messages.py

▤ p2p_node_network_limited.py

▤ p2p_opportunistic_1p1c.py

▤ p2p_orphan_handling.py

▤ p2p_outbound_eviction.py

▤ p2p_permissions.py

▤ p2p_ping.py

▤ p2p_private_broadcast_cap.py

▤ p2p_private_broadcast_completion.py

▤ p2p_private_broadcast_retry_v1.py

▤ p2p_private_broadcast.py

▤ p2p_tx_relay_rate_limit.py

▤ p2p_unrequested_blocks.py

▤ p2p_v2_encrypted.py

▤ p2p_v2_misbehaving.py

▤ p2p_v2_transport.py

▤ README.md

▤ rpc_bind.py

▤ rpc_blockchain.py

▤ rpc_createmultisig.py

▤ rpc_decodescript.py

▤ rpc_deprecated.py

▤ rpc_deriveaddresses.py

▤ rpc_dumptxoutset.py

▤ rpc_echo_payload.py

▤ rpc_estimatefee.py

▤ rpc_generate.py

▤ rpc_getblockfilter.py

▤ rpc_getblockfrompeer.py

▤ rpc_getblockstats.py

▤ rpc_getchaintips.py

▤ rpc_getdescriptoractivity.py

▤ rpc_getdescriptorinfo.py

▤ rpc_gettxspendingprevout.py

▤ rpc_help.py

▤ rpc_invalid_address_message.py

▤ rpc_invalidateblock.py

▤ rpc_misc.py

▤ rpc_named_arguments.py

▤ rpc_preciousblock.py

▤ rpc_psbt.py

▤ rpc_rawtransaction.py

▤ rpc_scanblocks.py

▤ rpc_scantxoutset.py

▤ rpc_setban.py

▤ rpc_signer.py

▤ rpc_signmessagewithprivkey.py

▤ rpc_signrawtransactionwithkey.py

▤ rpc_txoutproof.py

▤ rpc_uptime.py

▤ rpc_users.py

▤ rpc_validateaddress.py

▤ rpc_whitelist.py

▤ test_runner.py

▤ test-shell.md

▤ tool_bench_sanity_check.py

▤ tool_bitcoin_chainstate.py

▤ tool_bitcoin.py

▤ tool_rpcauth.py

▤ tool_signet_miner.py

▤ tool_utils.py

▤ tool_utxo_to_sqlite.py

▤ tool_wallet.py

▤ wallet_abandonconflict.py

▤ wallet_address_types.py

▤ wallet_anchor.py

▤ wallet_ancient_migration.py

▤ wallet_assumeutxo.py

▤ wallet_avoid_mixing_output_types.py

▤ wallet_avoidreuse.py

▤ wallet_backup.py

▤ wallet_backwards_compatibility.py

▤ wallet_change_address.py

▤ wallet_coinbase_category.py

▤ wallet_conflicts.py

▤ wallet_create_tx.py

▤ wallet_createwallet.py

▤ wallet_createwalletdescriptor.py

▤ wallet_crosschain.py

▤ wallet_deprecated_rbf.py

▤ wallet_derivehdkey.py

▤ wallet_descriptor.py

▤ wallet_disable.py

▤ wallet_encryption.py

▤ wallet_exported_watchonly.py

▤ wallet_fallbackfee.py

▤ wallet_fast_rescan.py

▤ wallet_fundrawtransaction.py

▤ wallet_gethdkeys.py

▤ wallet_groups.py

▤ wallet_hd.py

▤ wallet_importdescriptors.py

▤ wallet_importprunedfunds.py

▤ wallet_keypool_topup.py

▤ wallet_keypool.py

▤ wallet_labels.py

▤ wallet_listdescriptors.py

▤ wallet_listreceivedby.py

▤ wallet_listsinceblock.py

▤ wallet_listtransactions.py

▤ wallet_migration.py

▤ wallet_miniscript_decaying_multisig_descriptor_psbt.py

▤ wallet_miniscript.py

▤ wallet_multisig_descriptor_psbt.py

▤ wallet_multiwallet.py

▤ wallet_musig.py

▤ wallet_orphanedreward.py

▤ wallet_reindex.py

▤ wallet_reorgsrestore.py

▤ wallet_rescan_unconfirmed.py

▤ wallet_resendwallettransactions.py

▤ wallet_signmessagewithaddress.py

▤ wallet_signrawtransactionwithwallet.py

▤ wallet_simulaterawtx.py

▤ wallet_spend_unconfirmed.py

▤ wallet_startup.py

▤ wallet_taproot.py

▤ wallet_timelock.py

▤ wallet_transactiontime_rescan.py

▤ wallet_txn_clone.py

▤ wallet_txn_doublespend.py

▤ wallet_v3_txs.py

fuzz

lint

sanitizer_suppressions

▤ CMakeLists.txt

▤ config.ini.in

▤ download_utils.py

▤ get_previous_releases.py

▤ CMakeLists.txtGuide

▤ libbitcoinkernel.pc.in

bitcoin / test / functional / test_framework / v2_p2p.py

Download source ↓

13,461 bytes · SHA-256 0ba6bfc9495623bd… · View upstream ↗

251        """Encrypt a BIP324 packet.
252
253        Returns:
254        bytes - encrypted packet contents
255        """
256        assert len(contents) <= 2**24 - 1
257        header = (ignore << IGNORE_BIT_POS).to_bytes(HEADER_LEN, 'little')
258        plaintext = header + contents
259        aead_ciphertext = self.peer['send_P'].encrypt(aad, plaintext)
260        enc_plaintext_len = self.peer['send_L'].crypt(len(contents).to_bytes(LENGTH_FIELD_LEN, 'little'))
261        return enc_plaintext_len + aead_ciphertext
262
263    def v2_receive_packet(self, response, aad=b''):
264        """Decrypt a BIP324 packet
265
266        Returns:
267        1. int - number of bytes consumed (or -1 if error)
268        2. bytes - contents of decrypted non-decoy packet if any (or None otherwise)
269        """
270        if self.contents_len == -1:
271            if len(response) < LENGTH_FIELD_LEN:
272                return 0, None
273            enc_contents_len = response[:LENGTH_FIELD_LEN]
274            self.contents_len = int.from_bytes(self.peer['recv_L'].crypt(enc_contents_len), 'little')
275        response = response[LENGTH_FIELD_LEN:]
276        if len(response) < HEADER_LEN + self.contents_len + CHACHA20POLY1305_EXPANSION:
277            return 0, None
278        aead_ciphertext = response[:HEADER_LEN + self.contents_len + CHACHA20POLY1305_EXPANSION]
279        plaintext = self.peer['recv_P'].decrypt(aad, aead_ciphertext)
280        if plaintext is None:
281            return -1, None  # disconnect
282        header = plaintext[:HEADER_LEN]
283        length = LENGTH_FIELD_LEN + HEADER_LEN + self.contents_len + CHACHA20POLY1305_EXPANSION
284        self.contents_len = -1
285        return length, None if (header[0] & (1 << IGNORE_BIT_POS)) else plaintext[HEADER_LEN:]
286

← Previous 250 linesCode page 2

A READING COMPANION

Source available. Guide coming next.

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

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

Independent explanations by MyBitcoinExplorer. Not affiliated with or endorsed by Bitcoin Core. Guides are educational and do not replace the source or its tests.

Bitcoin Core source © its contributors, distributed under the MIT license. Original notices and bundled third-party licenses are retained in the source tree.