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Ryan Ofsky 5acf12bafe
Merge bitcoin/bitcoin#31583: rpc: add target to getmininginfo field and show next block info 
a4df12323c doc: add release notes (Sjors Provoost)
c75872ffdd test: use DIFF_1_N_BITS in tool_signet_miner (tdb3)
4131f322ac test: check difficulty adjustment using alternate mainnet (Sjors Provoost)
c4f68c12e2 Use OP_0 for BIP34 padding in signet and tests (Sjors Provoost)
cf0a62878b rpc: add next to getmininginfo (Sjors Provoost)
2d18a078a2 rpc: add target and bits to getchainstates (Sjors Provoost)
f153f57acc rpc: add target and bits to getblockchaininfo (Sjors Provoost)
baa504fdfa rpc: add target to getmininginfo result (Sjors Provoost)
2a7bfebd5e Add target to getblock(header) in RPC and REST (Sjors Provoost)
341f932516 rpc: add GetTarget helper (Sjors Provoost)
d20d96fa41 test: use REGTEST_N_BITS in feature_block (tdb3)
7ddbed4f9f rpc: add nBits to getmininginfo (Sjors Provoost)
ba7b9f3d7b build: move pow and chain to bitcoin_common (Sjors Provoost)
c4cc9e3e9d consensus: add DeriveTarget() to pow.h (Sjors Provoost)

Pull request description:

  **tl&dr for consensus-code only reviewers**: the first commit splits `CheckProofOfWorkImpl()` in order to create a `DeriveTarget()` helper. The rest of this PR does not touch consensus code.

  There are three ways to represent the proof-of-work in a block:

  1. nBits
  2. Difficulty
  3. Target

  The latter notation is useful when you want to compare share work against either the pool target (to get paid) or network difficulty (found an actual block). E.g. for difficulty 1 which corresponds to an nBits value of `0x00ffff`:

  ```
  share hash: f6b973257df982284715b0c7a20640dad709d22b0b1a58f2f88d35886ea5ac45
  target:     7fffff0000000000000000000000000000000000000000000000000000000000
  ```

  It's immediately clear that the share is invalid because the hash is above the target.

  This type of logging is mostly done by the pool software. It's a nice extra convenience, but not very important. It impacts the following RPC calls:

  1. `getmininginfo` displays the `target` for the tip block
  2. `getblock` and `getblockheader` display the `target` for a specific block (ditto for their REST equivalents)

  The `getdifficulty` method is a bit useless in its current state, because what miners really want to know if the difficulty for the _next_ block. So I added a boolean argument `next` to `getdifficulty`. (These values are typically the same, except for the first block in a retarget period. On testnet3 / testnet4 they change when no block is found after 20 minutes).

  Similarly I added a `next` object to `getmininginfo` which shows `bit`, `difficulty` and `target` for the next block.

  In order to test the difficulty transition, an alternate mainnet chain with 2016 blocks was generated and used in `mining_mainnet.py`. The chain is deterministic except for its timestamp and nonce values, which are stored in `mainnet_alt.json`.

  As described at the top, this PR introduces a helper method `DeriveTarget()` which is split out from `CheckProofOfWorkImpl`. The proposed `checkblock` RPC in #31564 needs this helper method internally to figure out the consensus target.

  Finally, this PR moves `pow.cpp` and `chain.cpp` from `bitcoin_node` to `bitcoin_common`, in order to give `rpc/util.cpp` (which lives in `bitcoin_common`) access to `pow.h`.

ACKs for top commit:
  ismaelsadeeq:
    re-ACK a4df12323c
  tdb3:
    code review re ACK a4df12323c
  ryanofsky:
    Code review ACK a4df12323c. Only overall changes since last review were dropping new `gettarget` method and dropping changes to `getdifficulty`, but there were also various internal changes splitting and rearranging commits.

Tree-SHA512: edef5633590379c4be007ac96fd1deda8a5b9562ca6ff19fe377cb552b5166f3890d158554c249ab8345977a06da5df07866c9f42ac43ee83dfe3830c61cd169
2025-01-22 15:01:23 -05:00
.github ci: Add missing --combinedlogslen to test-each-commit task 2025-01-21 15:34:39 +01:00
.tx qt: Bump Transifex slug for 28.x 2024-07-30 16:14:19 +01:00
ci Merge bitcoin/bitcoin#31593: ci: Bump centos stream 10 2025-01-20 16:11:58 +00:00
cmake build: remove LEVELDB_IS_BIG_ENDIAN 2025-01-16 11:10:23 +00:00
contrib Merge bitcoin/bitcoin#31623: tracing: Rename the MIN macro to _TRACEPOINT_TEST_MIN in log_raw_p2p_msgs 2025-01-10 11:23:32 +00:00
depends depends: Override default build type for libevent 2025-01-21 10:39:11 +00:00
doc Merge bitcoin/bitcoin#31583: rpc: add target to getmininginfo field and show next block info 2025-01-22 15:01:23 -05:00
share build: Rename PACKAGE_* variables to CLIENT_* 2024-10-28 12:35:55 +00:00
src Merge bitcoin/bitcoin#31583: rpc: add target to getmininginfo field and show next block info 2025-01-22 15:01:23 -05:00
test doc: add release notes 2025-01-22 12:31:46 +01:00
.cirrus.yml ci: Bump centos stream 10 2025-01-17 15:34:11 +01:00
.editorconfig code style: update .editorconfig file 2024-09-13 17:55:10 +02:00
.gitattributes Separate protocol versioning from clientversion 2014-10-29 00:24:40 -04:00
.gitignore build: Remove Autotools-based build system 2024-08-30 21:31:39 +01:00
.python-version Bump python minimum supported version to 3.10 2024-08-28 15:53:07 +02:00
.style.yapf Update .style.yapf 2023-06-01 23:35:10 +05:30
CMakeLists.txt Merge bitcoin/bitcoin#31543: cmake: Always provide RPATH on NetBSD 2025-01-17 14:11:33 +00:00
CMakePresets.json cmake: Remove unused BUILD_TESTING variable from "dev-mode" preset 2024-12-19 22:25:11 +00:00
CONTRIBUTING.md doc: remove PR Review Club frequency 2024-11-20 11:16:39 +01:00
COPYING doc: upgrade license to 2025. 2025-01-06 12:23:11 +00:00
INSTALL.md doc: Added hyperlink for doc/build 2021-09-09 19:53:12 +05:30
libbitcoinkernel.pc.in build: Rename PACKAGE_* variables to CLIENT_* 2024-10-28 12:35:55 +00:00
README.md doc: cmake: prepend and explain "build/" where needed 2024-10-11 11:24:21 -06:00
SECURITY.md Update security.md contact for achow101 2023-12-14 18:14:54 -05:00
vcpkg.json Remove wallet::ParseISO8601DateTime, use ParseISO8601DateTime instead 2024-12-02 15:09:31 +01:00

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 during the generation of the build system) with: ctest. 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: build/test/functional/test_runner.py (assuming build is your build directory).

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.