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Merge bitcoin/bitcoin#29625: Several randomness improvements 
ce8094246e random: replace construct/assign with explicit Reseed() (Pieter Wuille)
2ae392d561 random: use LogError for init failure (Pieter Wuille)
97e16f5704 tests: make fuzz tests (mostly) deterministic with fixed seed (Pieter Wuille)
2c91330dd6 random: cleanup order, comments, static (Pieter Wuille)
8e31cf9c9b net, net_processing: use existing RNG objects more (Pieter Wuille)
d5fcbe966b random: improve precision of MakeExponentiallyDistributed (Pieter Wuille)
cfb0dfe2cf random: convert GetExponentialRand into rand_exp_duration (Pieter Wuille)
4eaa239dc3 random: convert GetRand{Micros,Millis} into randrange (Pieter Wuille)
82de1b80d9 net: use GetRandMicros for cache expiration (Pieter Wuille)
ddc184d999 random: get rid of GetRand by inlining (Pieter Wuille)
e2d1f84858 random: make GetRand() support entire range (incl. max) (Pieter Wuille)
810cdf6b4e tests: overhaul deterministic test randomness (Pieter Wuille)
6cfdc5b104 random: convert XoRoShiRo128PlusPlus into full RNG (Pieter Wuille)
8cc2f45065 random: move XoRoShiRo128PlusPlus into random module (Pieter Wuille)
8f5ac0d0b6 xoroshiro128plusplus: drop comment about nonexisting copy() (Pieter Wuille)
8924f5120f random: modernize XoRoShiRo128PlusPlus a bit (Pieter Wuille)
ddb7d26cfd random: add RandomMixin::randbits with compile-known bits (Pieter Wuille)
21ce9d8658 random: Improve RandomMixin::randbits (Pieter Wuille)
9b14d3d2da random: refactor: move rand* utilities to RandomMixin (Pieter Wuille)
40dd86fc3b random: use BasicByte concept in randbytes (Pieter Wuille)
27cefc7fd6 random: add a few noexcepts to FastRandomContext (Pieter Wuille)
b3b382dde2 random: move rand256() and randbytes() to .h file (Pieter Wuille)
493a2e024e random: write rand256() in function of fillrand() (Pieter Wuille)

Pull request description:

  This PR contains a number of vaguely-related improvements to the random module.

  The specific changes and more detailed rationale is in the commit messages, but the highlights are:

  * `XoRoShiRo128PlusPlus` (previously a test-only RNG) moves to random.h and becomes `InsecureRandomContext`, which is even faster than `FastRandomContext` but non-cryptographic. It also gets all helper randomness functions (`randrange`, `fillrand`, ...), making it a lot more succinct to use.
  * During tests, **all** randomness is made deterministic (except for `GetStrongRandBytes`) but non-repeating (like `GetRand()` used to be when `g_mock_deterministic_tests` was used), either fixed, or from a random seed (overridden by env var).
  * Several infrequently used top-level functions (`GetRandMillis`, `GetRandMicros`, `GetExponentialRand`) are converted into member functions of `FastRandomContext` (and `InsecureRandomContext`).
  * `GetRand<T>()` (without argument) can now return the maximum value of the type (previously e.g. `GetRand<uint32_t>()` would never return 0xffffffff).

ACKs for top commit:
  achow101:
    ACK ce8094246e
  maflcko:
    re-ACK ce8094246e 🐈
  hodlinator:
    ACK ce8094246e
  dergoegge:
    utACK ce8094246e

Tree-SHA512: 79bc0cbafaf27e95012c1ce2947a8ca6f9a3c78af5f1f16e69354b6fc9b987a28858adf4cd356dc5baf21163e9af8dcc24e70f8d7173be870e8a3ddcdd47c02c
2024-07-04 11:26:43 +01:00
.github Squashed 'src/secp256k1/' changes from 06bff6dec8..4af241b320 2024-06-25 15:01:00 +01:00
.tx qt: Bump Transifex slug for 27.x 2024-02-07 09:24:32 +00:00
build_msvc Merge bitcoin/bitcoin#29494: build: Assume HAVE_CONFIG_H, Add IWYU pragma keep to bitcoin-config.h includes 2024-05-07 14:14:03 -04:00
build-aux/m4 Squashed 'src/secp256k1/' changes from 06bff6dec8..4af241b320 2024-06-25 15:01:00 +01:00
ci lint: ignore files ignored by git in mlc 2024-07-03 09:46:15 +01:00
contrib Merge bitcoin/bitcoin#29987: guix: build with glibc 2.31 2024-06-26 15:21:44 +01:00
depends depends: swap mmacosx-version-min for mmacos-version-min 2024-06-14 09:43:36 +01:00
doc Merge bitcoin/bitcoin#30272: doc: use TRUC instead of v3 and add release note 2024-07-02 17:49:32 -04:00
share contrib: rpcauth.py - Add new option (-j/--json) to output text in json format 2024-04-25 08:32:28 -05:00
src Merge bitcoin/bitcoin#29625: Several randomness improvements 2024-07-04 11:26:43 +01:00
test Merge bitcoin/bitcoin#29625: Several randomness improvements 2024-07-04 11:26:43 +01:00
.cirrus.yml Squashed 'src/secp256k1/' changes from 06bff6dec8..4af241b320 2024-06-25 15:01:00 +01:00
.editorconfig
.gitattributes
.gitignore Merge bitcoin/bitcoin#29733: build, macos: Drop unused osx_volname target 2024-04-02 14:57:22 +01:00
.python-version Bump .python-version from 3.9.17 to 3.9.18 2023-10-24 18:51:24 +02:00
.style.yapf
autogen.sh build: make sure we can overwrite config.{guess,sub} 2023-06-13 14:58:43 +02:00
configure.ac Merge bitcoin/bitcoin#30327: build: Drop redundant sys/sysctl.h header check 2024-06-26 15:25:46 +01:00
CONTRIBUTING.md doc: Correct pull request prefix for scripts and tools 2024-05-22 09:59:58 +02:00
COPYING doc: upgrade Bitcoin Core license to 2024 2024-01-10 16:29:01 -06:00
INSTALL.md
Makefile.am Merge bitcoin/bitcoin#29739: build: swap cctools otool for llvm-objdump 2024-05-11 18:34:42 +08:00
README.md Squashed 'src/secp256k1/' changes from 06bff6dec8..4af241b320 2024-06-25 15:01:00 +01:00
SECURITY.md Update security.md contact for achow101 2023-12-14 18:14:54 -05:00

README.md

Bitcoin Core integration/staging tree

https://bitcoincore.org

For an immediately usable, binary version of the Bitcoin Core software, see https://bitcoincore.org/en/download/.

What is Bitcoin Core?

Bitcoin Core connects to the Bitcoin peer-to-peer network to download and fully validate blocks and transactions. It also includes a wallet and graphical user interface, which can be optionally built.

Further information about Bitcoin Core is available in the doc folder.

License

Bitcoin Core is released under the terms of the MIT license. See COPYING for more information or see https://opensource.org/licenses/MIT.

Development Process

The master branch is regularly built (see doc/build-*.md for instructions) and tested, but it is not guaranteed to be completely stable. Tags are created regularly from release branches to indicate new official, stable release versions of Bitcoin Core.

The https://github.com/bitcoin-core/gui repository is used exclusively for the development of the GUI. Its master branch is identical in all monotree repositories. Release branches and tags do not exist, so please do not fork that repository unless it is for development reasons.

The contribution workflow is described in CONTRIBUTING.md and useful hints for developers can be found in doc/developer-notes.md.

Testing

Testing and code review is the bottleneck for development; we get more pull requests than we can review and test on short notice. Please be patient and help out by testing other people's pull requests, and remember this is a security-critical project where any mistake might cost people lots of money.

Automated Testing

Developers are strongly encouraged to write unit tests for new code, and to submit new unit tests for old code. Unit tests can be compiled and run (assuming they weren't disabled in configure) with: make check. Further details on running and extending unit tests can be found in /src/test/README.md.

There are also regression and integration tests, written in Python. These tests can be run (if the test dependencies are installed) with: test/functional/test_runner.py

The CI (Continuous Integration) systems make sure that every pull request is built for Windows, Linux, and macOS, and that unit/sanity tests are run automatically.

Manual Quality Assurance (QA) Testing

Changes should be tested by somebody other than the developer who wrote the code. This is especially important for large or high-risk changes. It is useful to add a test plan to the pull request description if testing the changes is not straightforward.

Translations

Changes to translations as well as new translations can be submitted to Bitcoin Core's Transifex page.

Translations are periodically pulled from Transifex and merged into the git repository. See the translation process for details on how this works.

Important: We do not accept translation changes as GitHub pull requests because the next pull from Transifex would automatically overwrite them again.