mirrors/bitcoin
1
0
Fork 0
mirror of https://github.com/bitcoin/bitcoin.git synced 2024-11-20 02:25:40 +01:00
Code Issues Projects Releases Wiki Activity
Bitcoin Core integration/staging tree
30,175 Commits 6 Branches 318 Tags 3.2 GiB
C++ 64%
Python 19.9%
C 12.4%
CMake 1.1%
Shell 0.9%
Other 1.6%
21438d55d5
Go to file
fanquake 21438d55d5
Merge bitcoin/bitcoin#21800: mempool/validation: mempool ancestor/descendant limits for packages 
accf3d5868 [test] mempool package ancestor/descendant limits (glozow)
2b6b26e57c [test] parameterizable fee for make_chain and create_child_with_parents (glozow)
313c09f7b7 [test] helper function to increase transaction weight (glozow)
f8253d69d6 extract/rename helper functions from rpc_packages.py (glozow)
3cd663a5d3 [policy] ancestor/descendant limits for packages (glozow)
c6e016aa13 [mempool] check ancestor/descendant limits for packages (glozow)
f551841d3e [refactor] pass size/count instead of entry to CalculateAncestorsAndCheckLimits (glozow)
97dd1c729d MOVEONLY: add helper function for calculating ancestors and checking limits (glozow)
f95bbf58aa misc package validation doc improvements (glozow)

Pull request description:

  This PR implements a function to calculate mempool ancestors for a package and enforces ancestor/descendant limits on them as a whole. It reuses a portion of `CalculateMemPoolAncestors()`; there's also a small refactor to move the reused code into a generic helper function. Instead of calculating ancestors and descendants on every single transaction in the package and their ancestors, we use a "worst case" heuristic, treating every transaction in the package as each other's ancestor and descendant. This may overestimate everyone's counts, but is still pretty accurate in the our main package use cases, in which at least one of the transactions in the package is directly related to all the others (e.g. 1 parent + 1 child, multiple parents with 1 child, or chains).

  Note on Terminology: While "package" is often used to describe groups of related transactions _within_ the mempool, here, I only use package to mean the group of not-in-mempool transactions we are currently validating.

  #### Motivation

  It would be a potential DoS vector to allow submission of packages to mempool without a proper guard for mempool ancestors/descendants. In general, the purpose of mempool ancestor/descendant limits is to limit the computational complexity of dealing with families during removals and additions. We want to be able to validate multiple transactions on top of the mempool, but also avoid these scenarios:

  - We underestimate the ancestors/descendants during package validation and end up with extremely complex families in our mempool (potentially a DoS vector).
  - We expend an unreasonable amount of resources calculating everyone's ancestors and descendants during package validation.

ACKs for top commit:
  JeremyRubin:
    utACK accf3d5
  ariard:
    ACK accf3d5.

Tree-SHA512: 0d18ce4b77398fe872e0b7c2cc66d3aac2135e561b64029584339e1f4de2a6a16ebab3dd5784f376e119cbafc4d50168b28d3bd95d0b3d01158714ade2e3624d
2021-08-09 12:23:39 +08:00
.github doc: Remove label from good first issue template 2020-08-24 09:31:24 +02:00
.tx qt: Bump transifex slug for 22.x 2021-04-21 13:46:41 +02:00
build_msvc Merge bitcoin/bitcoin#22155: wallet test: Add test for subtract fee from recipient behavior 2021-07-27 11:21:46 +02:00
build-aux/m4 Merge bitcoin/bitcoin#21882: build: Fix undefined reference to __mulodi4 2021-07-29 20:53:36 +08:00
ci ci: Bump Android NDK to r22 which supports std::filesystem 2021-07-18 12:10:28 +03:00
contrib contrib, p2p: update I2P hardcoded seeds 2021-07-30 11:03:44 +02:00
depends depends: use latest config.guess and config.sub for sqlite 2021-07-22 11:10:29 +08:00
doc Merge bitcoin/bitcoin#22618: [p2p] Small follow-ups to 21528 2021-08-05 09:29:54 +02:00
share doc: add maxuploadtarget to bitcoin.conf example 2021-05-28 12:53:17 -04:00
src Merge bitcoin/bitcoin#21800: mempool/validation: mempool ancestor/descendant limits for packages 2021-08-09 12:23:39 +08:00
test Merge bitcoin/bitcoin#21800: mempool/validation: mempool ancestor/descendant limits for packages 2021-08-09 12:23:39 +08:00
.appveyor.yml Switch Appveyor CI to VS2019 stable image 2021-06-14 20:35:00 +01:00
.cirrus.yml Squashed 'src/secp256k1/' changes from efad3506a8..be8d9c262f 2021-07-14 10:02:02 -07:00
.editorconfig Add EditorConfig file. 2021-02-10 08:00:06 +01:00
.gitattributes Separate protocol versioning from clientversion 2014-10-29 00:24:40 -04:00
.gitignore Squashed 'src/secp256k1/' changes from efad3506a8..be8d9c262f 2021-07-14 10:02:02 -07:00
.python-version Bump minimum python version to 3.6 2020-11-09 17:53:47 +10:00
.style.yapf test: .style.yapf: Set column_limit=160 2019-03-04 18:28:13 -05:00
autogen.sh scripted-diff: Bump copyright of files changed in 2019 2019-12-30 10:42:20 +13:00
configure.ac Merge bitcoin/bitcoin#21882: build: Fix undefined reference to __mulodi4 2021-07-29 20:53:36 +08:00
CONTRIBUTING.md doc: Fix external links (IRC, ...) 2021-05-31 17:27:57 +02:00
COPYING doc: Update license year range to 2021 2020-12-30 16:24:47 +01:00
INSTALL.md Update INSTALL landing redirection notice for build instructions. 2016-10-06 12:27:23 +13:00
libbitcoinconsensus.pc.in build: remove libcrypto as internal dependency in libbitcoinconsensus.pc 2019-11-19 15:03:44 +01:00
Makefile.am Merge bitcoin/bitcoin#22234: build: Mark print-% target as phony. 2021-07-18 13:41:24 +08:00
README.md Squashed 'src/secp256k1/' changes from efad3506a8..be8d9c262f 2021-07-14 10:02:02 -07:00
REVIEWERS Update REVIEWERS: I've found that I keep track of PRs in need of review without the need for DrahtBot's automated notification :) 2021-06-10 09:00:05 +00:00
SECURITY.md doc: Remove explicit mention of version from SECURITY.md 2019-06-14 06:39:17 -04:00

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/.

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

What is Bitcoin?

Bitcoin is an experimental digital currency that enables instant payments to anyone, anywhere in the world. Bitcoin uses peer-to-peer technology to operate with no central authority: managing transactions and issuing money are carried out collectively by the network. Bitcoin Core is the name of open source software which enables the use of this currency.

For more information read the original Bitcoin whitepaper.

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.