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

▤ 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 / mining_template_verification.py

Download source ↓

11,384 bytes · SHA-256 59664eb4707a40cc… · View upstream ↗

251        return block_3
252
253    def parallel_test(self, node, block_3):
254        # Ensure that getblocktemplate can be called concurrently by many threads.
255        self.log.info("Check blocks in parallel")
256        def check_50_blocks(n):
257            return [
258                assert_template(n, block_3, "bad-txns-inputs-missingorspent", submit=False)
259                for _ in range(50)
260            ]
261        rpcs = [node.cli for _ in range(6)]
262        with ThreadPoolExecutor(max_workers=len(rpcs)) as threads:
263            list(threads.map(check_50_blocks, rpcs))
264
265    def run_test(self):
266        node = self.nodes[0]
267
268        block_0_height = node.getblockcount()
269        self.generate(node, sync_fun=self.no_op, nblocks=1)
270        block_1 = node.getblock(node.getbestblockhash())
271        block_2 = create_block(
272            int(block_1["hash"], 16),
273            height=block_0_height + 2,
274            ntime=block_1["mediantime"] + 1,
275        )
276
277        self.valid_block_test(node, block_2)
278        self.cb_missing_test(node, block_2)
279        self.block_without_transactions_test(node, block_2)
280        self.truncated_final_transaction_test(node, block_2)
281        self.duplicate_transaction_test(node, block_2)
282        self.thin_air_spending_test(node, block_2)
283        self.non_final_transaction_test(node, block_2)
284        self.bad_tx_count_test(node, block_2)
285        self.nbits_test(node, block_2)
286        self.merkle_root_test(node, block_2)
287        self.bad_timestamp_test(node, block_2)
288        self.current_tip_test(node, block_2)
289        # This sets the PoW for the next test
290        self.pow_test(node, block_2)
291        self.submit_test(node, block_0_height, block_2)
292
293        self.log.info("Generate a transaction")
294        tx = MiniWallet(node).create_self_transfer()
295
296        self.transaction_test(node, block_0_height, tx)
297        self.overspending_transaction_test(node, block_0_height, tx)
298        block_3 = self.spend_twice_test(node, block_0_height, tx)
299        self.parallel_test(node, block_3)
300
301if __name__ == "__main__":
302    MiningTemplateVerificationTest(__file__).main()
303

← 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.