51c050787f
d7f359b35e8b1e9acc4d397de262cd9ba9bbcb83 Add tests for parallel compact block downloads (Greg Sanders) 03423f8bd12b95a06a4a9d8377e781625dd38aae Support up to 3 parallel compact block txn fetchings (Greg Sanders) 13f9b20b4cb2f3f26e81184a77e9cf1f626d4f57 Only request full blocks from the peer we thought had the block in-flight (Greg Sanders) cce96182ba2457335868c65dc16b081c3dee32ee Convert mapBlocksInFlight to a multimap (Greg Sanders) a90595478dcf4e443cd15bbb822d485dc42bdb18 Remove nBlocksInFlight (Greg Sanders) 86cff8bf18f2c6344a25ad8b81cf366201a73c36 alias BlockDownloadMap for mapBlocksInFlight (Greg Sanders) Pull request description: This is an attempt at mitigating https://github.com/bitcoin/bitcoin/issues/25258 , which is a revival of https://github.com/bitcoin/bitcoin/pull/10984, which is a revival of https://github.com/bitcoin/bitcoin/pull/9447. This PR attempts to mitigate a single case, where high bandwidth peers can bail us out of a flakey peer not completing blocks for us. We allow up to 2 additional getblocktxns requests per unique block. This would hopefully allow the chance for an honest high bandwidth peer to hand us the transactions even if the first in flight peer stalls out. In contrast to previous effort: 1) it will not help if subsequent peers send block headers only, so only high-bandwidth peers this time. See: https://github.com/bitcoin/bitcoin/pull/10984/files#diff-6875de769e90cec84d2e8a9c1b962cdbcda44d870d42e4215827e599e11e90e3R1411 2) `MAX_GETBLOCKTXN_TXN_AFTER_FIRST_IN_FLIGHT` is removed, in favor of aiding recovery during turbulent mempools 3) We require one of the 3 block fetching slots to be an outbound peer. This can be the original offering peer, or subsequent compact blocks given by high bandwidth peers. ACKs for top commit: sdaftuar: ACK d7f359b35e8b1e9acc4d397de262cd9ba9bbcb83 mzumsande: Code Review ACK d7f359b35e8b1e9acc4d397de262cd9ba9bbcb83 Tree-SHA512: 54980eac179e30f12a0bd49df147b2c3d63cd8f9401abb23c7baf02f76eeb59f2cfaaa155227990d0d39384de9fa38663f88774e891600a3837ae927f04f0db3
Bitcoin Core integration/staging tree
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.