Inside Bitcoin
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Inside Bitcoin
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The code behind the network, with room to understand it.
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.
1v30.3 Release Notes2===================4Bitcoin Core version v30.3 is now available from:6<https://bitcoincore.org/bin/bitcoin-core-30.3/>8This release includes new features, various bug fixes and performance9improvements, as well as updated translations.11Please report bugs using the issue tracker at GitHub:13<https://github.com/bitcoin/bitcoin/issues>15To receive security and update notifications, please subscribe to:17<https://bitcoincore.org/en/list/announcements/join/>19How to Upgrade20==============22If you are running an older version, shut it down. Wait until it has completely23shut down (which might take a few minutes in some cases), then run the24installer (on Windows) or just copy over `/Applications/Bitcoin-Qt` (on macOS)25or `bitcoind`/`bitcoin-qt` (on Linux).27Upgrading directly from a version of Bitcoin Core that has reached its EOL is28possible, but it might take some time if the data directory needs to be migrated. Old29wallet versions of Bitcoin Core are generally supported.31Compatibility32==============34Bitcoin Core is supported and tested on operating systems using the35Linux Kernel 3.17+, macOS 13+, and Windows 10+. Bitcoin36Core should also work on most other Unix-like systems but is not as37frequently tested on them. It is not recommended to use Bitcoin Core on38unsupported systems.40Notable changes41===============43This release fixes an issue where the chainstate database would repeatedly44rewrite large portions of itself, causing excessive disk reads and writes45during normal operation.47### Validation49- #35209 validation: correct lifetime of precomputed tx data50- #35465 coins: compact chainstate regularly52### Leveldb54- #61(bitcoin-core/leveldb): Disable seek compaction56### Wallet58- #34358 wallet: fix removeprunedfunds bug with conflicting transactions59- #34870 wallet: feebumper, fix crash when combined bump fee is unavailable60- #34888 wallet: fix amount computed as boolean in coin selection61- #35228 wallet: use outpoint when estimating input size63### Net65- #34093 netif: fix compilation warning in QueryDefaultGatewayImpl()66- #34549 net: reduce log level for PCP/NAT-PMP NOT_AUTHORIZED failures68### PSBT70- #34272 psbt: Fix PSBTInputSignedAndVerified bounds assert71- #34219 psbt: validate pubkeys in MuSig2 pubnonce/partial sig deserialization73### Miniscript75- #34434 miniscript: correct and_v() properties77### Build79- #34228 depends: Unset SOURCE_DATE_EPOCH in gen_id script80- #34281 build: Temporarily remove confusing and brittle -fdebug-prefix-map81- #34554 build: avoid exporting secp256k1 symbols82- #34627 guix: use a temporary file over sponge, drop moreutils83- #34713 depends: Allow building Qt packages after interruption84- #34754 depends: Qt fixes for GCC 16 compatibility85- #34787 build: fix native macOS deployment86- #34848 cmake: Migrate away from deprecated SQLite3 target87- #34956 depends, qt: Fix build on aarch64 macOS 26.489### Test91- #34185 test: fix feature_pruning when built without wallet92- #34282 qa: Fix Windows logging bug93- #34390 test: allow overriding tar in get_previous_releases.py94- #34409 test: use ModuleNotFoundError in interface_ipc.py95- #34445 fuzz: Use AFL_SHM_ID for naming test directories96- #34608 test: Fix broken --valgrind handling after bitcoin wrapper97- #34690 test: Add missing timeout_factor to zmq socket98- #34869 tests: applied PYTHON_GIL to the env for every test99- #34918 fuzz: [refactor] Remove unused g_setup pointers100- #35080 test: Add missing self.options.timeout_factor scale in tool_bitcoin_chainstate.py102### Util104- #34597 util: Fix UB in SetStdinEcho when ENOTTY106### Doc108- #34252 doc: add 433 (Pay to Anchor) to bips.md109- #34413 doc: Remove outdated -fdebug-prefix-map section in dev notes110- #34510 doc: fix broken bpftrace installation link111- #34561 wallet: rpc: manpage: fix example missing `fee_rate` argument112- #34671 doc: Update Guix install for Debian/Ubuntu113- #34702 doc: Fix fee field in getblock RPC result114- #34706 doc: Improve dependencies.md IPC documentation115- #34789 doc: update build guides pre v31116- #35283 doc: mention -DWITH_ZMQ=ON in BSD build guides118### CI120- #32513 ci: remove 3rd party js from windows dll gha job121- #34344 ci: update GitHub Actions versions122- #34453 ci: Always print low ccache hit rate notice123- #34461 ci: Print verbose build error message in test-each-commit124- #34802 ci: Bump GHA actions versions125- #34815 ci: bump cirruslabs actions versions126- #35202 ci: restore sockets in i686, no IPC job127- #35378 ci: switch runners from cirrus to warpbuild128- #35408 ci: 35378 followups130### Misc132- #35175 multi_index: fix compilation failure with boost >= 1.91134Credits135=======137Thanks to everyone who directly contributed to this release:139- ANAVHEOBA140- andrewtoth141- brunoerg142- Cory Fields143- Daniel Pfeifer144- darosior145- fanquake146- furszy147- Hennadii Stepanov148- jayvaliya149- junbyjun1238150- kevkevinpal151- Lőrinc152- m3dwards153- marcofleon154- MarcoFalke155- mzumsande156- nervana21157- Padraic Slattery158- ryanofsky159- Sebastian Falbesoner160- SomberNight161- tboy1337162- theuni163- ToRyVand164- willcl-ark166As well as to everyone that helped with translations on167[Transifex](https://explore.transifex.com/bitcoin/bitcoin/).
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