5801dd628d docs: Add more tips to productivity.md (gwillen)
Pull request description:
Add advice to productivity.md on:
- Using ccache to optimal effect
- The with-incompatible-bdb configure option
- Building less than the entire set of targets
ACKs for commit 5801dd:
promag:
utACK 5801dd6.
MarcoFalke:
utACK 5801dd6
Tree-SHA512: 2138acd4bf5a27ecaa9a02fb2141903d01ee199ba85ccf6a5ad6a0a4dabf4447d043108cdd86998801b0282e899f70892f9337b0b6dc59c6d1f0fccf61adb4e4
f7696e6183 depends: qt: Don't hardcode pwd path (Carl Dong)
89bee1bdbf depends: tar: Always extract as yourself (Carl Dong)
340ef50772 depends: Defer to Python detected by autoconf (Carl Dong)
Pull request description:
Removes some implicit assumptions that the depends system has about its environment and, as a side-effect, makes it possible to build the depends tree under severely privilege-limited environments such as containers built by Guix.
Tree-SHA512: e8618f9310a0deae864b44f9b60baa29e6225ba16817973ff7830b55798ebd4343aa06da6c1f92682a7afb709d26f80d6ee794a139d4d44c27caf4f0c8fe95fc
19a0c4af0f depends: native_protobuf: avoid system zlib (Carl Dong)
Pull request description:
I don't believe we use any zlib features in protobufs
Tree-SHA512: cd09229f3fac215f58e9ddd4871f190cf2a301e25939aaa1c6ee130d1ba5bbb00d9ebe9ca012a2894bac4c2db923259f34fe43e255ad55ccd2b11ec88afc2a8f
228e80608 Enable TLS in link to chris.beams.io (JeremyRand)
Pull request description:
This PR enables TLS in a documentation link to chris.beams.io, which improves security. This change was originally part of https://github.com/bitcoin/bitcoin/pull/13778 , which was closed for reasons unrelated to this change.
Tree-SHA512: 01f02031b39ebdaa7fc1859befde7e3bfff105892a8b9e1737ff94741599c6c5936eff53871e5e3560931512c9b7a4ea34f48d8555b583d232c90c2ca6d4d776
ff7f31e07d [doc] productivity: more advanced git range-diff (Sjors Provoost)
3a21905a4e [doc] devtools: mention clang-format dependency (Sjors Provoost)
bf12093191 [doc] productivity: fix broken link (Sjors Provoost)
Pull request description:
Fixes a broken link to `devtools/README.md`, points out the `clang-format` dependency and adds a `git range-diff` incantation that works even with rebases and squashes.
Tree-SHA512: 36e46282f1e28d1bf3f48ada995fbac548f61b7747091eb032b60919cf76c7bdad0fa8aecb0c47adbdaa9ef986d3ec7752b0bb94c63191401856e2ddeec48f3e
fa55104cb8e73c709e90fc5f81c9cb6a8a0713a6 build: use full version string in setup.exe (MarcoFalke)
Pull request description:
Fixes: #15546
Tree-SHA512: a8ccbfef6b9fdd10bd0facadb25019b9296579eee6c8f7b4e5298cc4df52bba61864135ab8f46b900f7a3888fbcc921e039412d5a8127e44d8f2dd2c8fc56f86
32da92bdf6bb55d6d312b0f85797d439cc942db5 gitian: Improve error handling (Wladimir J. van der Laan)
Pull request description:
Improve error handling in gitian builds:
- Set fail-on-error and pipefail flag, this causes a command to fail when either of the pipe stages fails, not only when the last of the stages fails, so this improves error detection.
- Also use `xargs` instead of `find -exec`, because `find` will not propagate errors in the executed command, but `xargs` will.
This will avoid some issues like #15541 where non-determinism is silently introduced due to errors caused by environment conditions (such as lack of disk space in that case).
Tree-SHA512: d5d3f22ce2d04a75e5c25e935744327c3adc704c2d303133f2918113573a564dff3d3243d5569a2b93ee7eb0e97f8e1b1ba81767e966af9015ea711a14091035
fa45123f66 test: Add .style.yapf (MarcoFalke)
Pull request description:
This can *optionally* be used to format any added code before submitting a pull. I use this heavily and wouldn't want to hold it back from others, now that yapf is referred to in https://github.com/bitcoin/bitcoin/blob/master/doc/productivity.md#format-python-diffs-with-yapf-diffpy
Tree-SHA512: 0f3d8bcbb76a710d9faa1226202073e8d967a82a05fc002cd10305ff58b382f5ff3df96a6faaec5bd01613d41f5fc2343e4999fb1217bf1f24f6da186d572ca1
43206239a8 tests: Add script checking for deterministic line coverage (practicalswift)
Pull request description:
Add script checking for deterministic line coverage in unit tests.
Context: #14343 ("coverage reports non-deterministic")
When the coverage is deterministic this script can be invoked from Travis to guard against regressions, but left inactive for now.
Output in case of determinism:
```
$ contrib/test_deterministic_coverage.sh 2
[2019-01-30 20:08:46] Measuring coverage, run #1 of 2
[2019-01-30 20:10:45] Measuring coverage, run #2 of 2
Coverage test passed: Deterministic coverage across 2 runs.
```
Output in case of non-determinism:
```
$ contrib/test_deterministic_coverage.sh 2
[2019-01-30 20:08:46] Measuring coverage, run #1 of 2
[2019-01-30 20:10:45] Measuring coverage, run #2 of 2
The line coverage is non-deterministic between runs.
The test suite must be deterministic in the sense that the set of lines executed at least
once must be identical between runs. This is a neccessary condition for meaningful coverage
measuring.
--- gcovr.run-1.txt 2019-01-30 23:14:07.419418694 +0100
+++ gcovr.run-2.txt 2019-01-30 23:15:57.998811282 +0100
@@ -471,7 +471,7 @@
test/crypto_tests.cpp 270 270 100%
test/cuckoocache_tests.cpp 142 142 100%
test/dbwrapper_tests.cpp 148 148 100%
-test/denialofservice_tests.cpp 225 225 100%
+test/denialofservice_tests.cpp 225 224 99% 363
test/descriptor_tests.cpp 116 116 100%
test/fs_tests.cpp 24 3 12% 14,16-17,19-20,23,25-26,29,31-32,35-36,39,41-42,45-46,49,51-52
test/getarg_tests.cpp 111 111 100%
@@ -585,5 +585,5 @@
zmq/zmqpublishnotifier.h 5 0 0% 12,31,37,43,49
zmq/zmqrpc.cpp 21 0 0% 16,18,20,22,33-35,38-45,49,52,56,60,62-63
------------------------------------------------------------------------------
-TOTAL 61561 27606 44%
+TOTAL 61561 27605 44%
------------------------------------------------------------------------------
```
In this case line 363 of `test/denialofservice_tests.cpp` was executed only in the second run. Non-determinism detected!
Tree-SHA512: 03f45590e70a87146f89aa7838beeff0925d7fd303697ff03e0e69f8a5861694be5f0dd10cb0020e3e3d40c9cf662f71dfcd838f6affb31bd5212314e0a4e3a9
fb97437 added note that control port must be enabled and how to do that in torrc config file (Jordan Baczuk)
Pull request description:
Reopened from bitcoin#13681 because pushes made it unable to reopen.
Tree-SHA512: 34eac14308aef70963b630173cd93916201553d5323ab2de3517d4a78604ae5a7cf8691a314c0af00fe36f0ef19b94a4c371d2e7aa1229d9c603d36c51b115fb
414326952c use export LC_ALL=C.UTF-8 (Julian Fleischer)
728c82d029 make script exit if a command fails (Julian Fleischer)
506890b24d move remaining travis build steps into individual files (Julian Fleischer)
272306ea57 number .travis/ script according to build lifecycle and add README to explain (Julian Fleischer)
519e2739cf move lint stage up to resemble travis build ui (Julian Fleischer)
86d34f0e65 abort script in END_FOLD on non-zero exit code (Julian Fleischer)
4f2f88c7b0 move script sections info individual files and comply with shellcheck (Julian Fleischer)
Pull request description:
This PR is extracted from https://github.com/bitcoin/bitcoin/pull/13816 to make that one easier to review. It follows on https://github.com/bitcoin/bitcoin/pull/13849 and https://github.com/bitcoin/bitcoin/pull/13851
In here the shell script parts from `travis.yml` are extracted into `.travis/before_install.sh`, `.travis/install.sh`, `.travis/before_script.sh`, `.travis/script.sh`, and `.travis/lint.sh`.
This has the benefit that `test/lint/lint-shell.sh` will also shellcheck these parts. Also it makes the individual script parts more readable.
Tree-SHA512: c497e1687ceb1c1d795de177d3fc35af908bc8e3f781a871afabdecf031e581d4db229290627249e35ef7c09952bc34884e4734ea91d40f57b4a9efb85bba2e3
a9910d82c3 contrib: Adjust output to current test format (Akio Nakamura)
Pull request description:
This PR makes the output of ```gen_base58_test_vectors.py``` to fit to current test format.
The test has already been changed(separated) from ```base58_test``` to ```key_io_test```, so change the file name of this script as well.
(This will solve #13553 )
Tree-SHA512: 2986009acd734edd5b6ee0a5efed9e8d156c99b1919a0e9f6ffdd4c863f52f4d1c6bfdaca359937ea380e311dda559d96449fc6a7224092c1fb2517ee5b83369
# Conflicts:
# contrib/testgen/gen_base58_test_vectors.py
fad8afa3883675880dfa7fa6664fe658f10b11b5 travis: Run unit tests --with-sanitizers=undefined (MarcoFalke)
0d00fd5901102d9ca2b99d6f17a3bd96c946e3b7 depends: allow CC/CXX to be overridden during configure (Cory Fields)
Pull request description:
See issue #12691
Tree-SHA512: 0772e8e037411cb4664270945a0fc9c0c1ed24eeaf5308460baee707868f7b700d8e740a6babb1d02bc818a8a4b71d9e33601ab2cc850ff315755fcf3d79d29e
# Conflicts:
# .travis.yml
fa3e874d69 test: pruning: Check that verifychain can be called when pruned (MarcoFalke)
Pull request description:
Tree-SHA512: b921e550fdad27b791665883ed9fc50210575b0f968840a45284ad0e060ddd443ea7b9b12c17916f68ad28877c58ac51a6acc76ae4ea71bf7bfb2f744b286884
66e15e8f97 Explain GetAncestor check for m_failed_blocks in AcceptBlockHeader (Sjors Provoost)
Pull request description:
Salvaged (but slightly modified) from #12138, the comment there was really helpful to wrap my head around that part of the code.
In addition, a naive reader like yours truly will first think `IsValid(BLOCK_VALID_SCRIPTS)` means the previous block was invalid. But IIUC that's not what it means. Instead, it means the block hasn't been checked for validity at the `BLOCK_VALID_SCRIPTS` level yet. So in that case the existing text "previous block index isn't valid" is wrong.
Tree-SHA512: 442a319a83290d94697fdf51376463b70454e0f3909d4a45594ddc2e7c26cd19dc703808385a25e26d6d2dddab0aa35ca41722f2e65ee6fe57bbaf62652d3ec8
57281199b8 lint/format-strings: Correctly exclude escaped percent symbols (Luke Dashjr)
Pull request description:
The current code fails to exclude correctly for patterns like `"%%%X"`
Tree-SHA512: cac6f6fb3f06a9190310cd9764ec31cd7d636f9c831057622f418ae5fd2e1d80927a88f585d18f57b279ac21e81518f714dc1a25155377b9297741a73600461e
4d454dcb6 Refactoring with QString::toNSString (Hennadii Stepanov)
Pull request description:
This PR makes `MacNotificationHandler::showNotification()` cleaner and more readable.
The used `QString::toNSString()` function was introduced in Qt 5.2 which is minimum version now (#14725).
The behavior of `MacNotificationHandler::showNotification()` has not been changed.
cc: @jonasschnelli
Tree-SHA512: 940327a77746ee016415efd3b696ad8ec85dcf12bf3f62e55c9bdc1700415d81a8d03fbc79310982d37a4098786dcaef7cd9702db5498d59d8065447babc27f5
fbaaf782cea54dc433e72129ee1088b3169cdfd4 validation: assert that pindexPrev is non-null when required (Karl-Johan Alm)
Pull request description:
In `ContextualCheckBlock`, we are checking if `pindexPrev == nullptr` conditionally at the start, but then assume it is non-`null` later. This removes the latter assumption.
Tree-SHA512: 95f1e9dc839b2cc0e099d155e6180634ece8c6760d00b53e7d27128762e64c92e82d98a5f4a5786b48a4851b17cdbb4b667d3b6a99adb651256e2032de67d05c
fa694f706c37a1c512a7c346591a63c5e09ee239 test: Add tests for truncated scripts (MarcoFalke)
Pull request description:
Previously not covered by any test
Tree-SHA512: 9f99659bdf3947271074938456a2fe64f5b39fc868e9aa474cec199a536ae5d7428f1cfa7f361936b71b09ee4c426261e6b25668fa77b8416b30dbe4ddb357f0
5c40e7b91a test: allows test_runner command line to receive parameters for each test (marcoagner)
Pull request description:
Fixes#14791.
Seems to address the asked behaviour in a simple way, but could address more if a more complex behaviour is found to be needed (e.g. call `rpc_bind --ipv4` without the ".py" and have it added).
Tree-SHA512: d7e21dd0ada36dd97dac71196bb97702a92986b181beb3753e37e3294b899fb65129aff5f9a45fe92b06fbf7c74e605ccb87a422f874f7a85d30401f4c2228c8
b7df96f4565064bcb7cbbf7e2507e03bdcf339f0 refactor: Drop boost::this_thread::interruption_point and boost::thread_interrupted in main thread (Chun Kuan Lee)
Pull request description:
This PR drops useless `boost::this_thread::interruption_point` and `boost::thread_interrupted` catch. They are only executed in main thread.
Tree-SHA512: a980d098c1a8238e4f0da9493731d7e69b9ca8e010103f442722d0d4cce471cc40a1fafd5f05535ad0e18899b6cf7563ee20e4025f7c7bc15182a0058c028922
a67d71311d [doc] developer-notes.md: point out that UniValue deviates from upstream (Sjors Provoost)
Pull request description:
While debugging an issue I was somewhat surprised to [learn](https://github.com/bitcoin/bitcoin/pull/14164#issuecomment-419752678) that we've moved `src/univalue` from https://github.com/jgarzik/univalue to https://github.com/bitcoin-core/univalue, that these repos are both maintained and they're different.
The first mention of using the bitcoin-core repo is from late 2015 in #7157. I didn't check when the last common ancestor commit is.
I couldn't find documentation as to why (these things just happen in open source of course), but at minimum we should make this more clear.
There's also the following line in `config.ac` that I'm not sure what to do with:
```
AC_INIT([univalue], [1.0.3],
[http://github.com/jgarzik/univalue/])
```
Tree-SHA512: e58105677b5ebe0005772282da4a805fee7dfccacfb1b2686a874517bf46072d1481181f8a8865d25526f6ed9e5fcd55d8d49906bf27cd0f5aefe4f258aa4d63
1ca050254145ebbbbf5910bfee2e82a45e465ca1 scripts: Add trusted key for Samuel Dobson (Wladimir J. van der Laan)
Pull request description:
Add trusted GPG key so that Samuel Dobson (MeshCollider), who is now wallet maintainer, can merge PRs.
Tree-SHA512: 6b2ef8ac1c8965eaaf5fc677dbf3bb7109e1f9dd4b56072a3409bcd232d5f1241c4e3d5fe962fcabb32880a4dbc49e5d6fb5e087e535a53f8d5d954d4f10db1b
cf4b0327ed92ca8a1533cdf6c2b0015fd9b56397 Use std::numeric_limits<UNSIGNED>::max()) instead of (UNSIGNED)-1 (practicalswift)
6b82fc59eb19004e54f910261a40d5e1b9e44b42 Use const in COutPoint class (Hennadii Stepanov)
Pull request description:
Refactoring:
- all cases of using `(uint32_t) -1` in `COutPoint` class are replaced with const;
- also all remaining instances of `(UNSIGNED)-1` transformed to `std::numeric_limits<UNSIGNED>::max()` (by @practicalswift).
Tree-SHA512: fc7fe9838b6e5136d8b97ea3d6f64c4aaa1215f4369832df432cab017396620bb6e30520a64180ceab6de222562ac11eab243a78dfa5a658ba018835a34caa19
af1ed206f Fix broken Gmane URLs (Craig Younkins)
Pull request description:
This is an automated pull request to fix broken Gmane URLs.
Here's what I did:
First I searched for Gmane URLs in your repo. For each Gmane URL, I checked if the content was available at the URL. For URLs where the content was not available, I first checked the `article` subdomain of Gmane, which has some content not available on the `thread` and `comments` subdomains.
If the content wasn't anywhere on Gmane's web interface, I resolved the URL to a [Message-ID](https://en.wikipedia.org/wiki/Message-ID) via the Gmane NNTP interface and tried to find the Message-ID on other mailing list archivers. I checked `mail-archive.com`, then `marc.info`, then `lists.debian.org` and so on.
If a new URL was found, I replaced it in this pull request. If the content wasn't found, I left the link alone.
Tree-SHA512: b46258de485a411fc4fbd6b8fb044c30fa062fd3a7ef78c6b8b405802c91283bc5c9f7f8b8c83385f3a12fe39578ea0695efd19ce19f3bb4606fbbd1be894d0e
9e0a514112 Add compile time checking for all cs_main runtime locking assertions (practicalswift)
Pull request description:
Add compile time checking for `cs_main` runtime locking assertions.
This PR is a subset of #12665. The PR was broken up to make reviewing easier.
The intention is that literally all `EXCLUSIVE_LOCKS_REQUIRED`/`LOCKS_EXCLUDED`:s added in this PR should follow either directly or indirectly from `AssertLockHeld(…)`/`AssertLockNotHeld(…)`:s already existing in the repo.
Consider the case where function `A(…)` contains `AssertLockHeld(cs_foo)` (without
first locking `cs_foo` in `A`), and that `B(…)` calls `A(…)` (without first locking `cs_main`):
* It _directly_ follows that: `A(…)` should have an `EXCLUSIVE_LOCKS_REQUIRED(cs_foo)` annotation.
* It _indirectly_ follows that: `B(…)` should have an `EXCLUSIVE_LOCKS_REQUIRED(cs_foo)` annotation.
Tree-SHA512: 120e7410c4c223dbc7d42030b1a19e328d01a55f041bb6fb5eaac10ac35cb0c5d469b9b3bda6444731164c73b88ac6495a00890672b107d9305e891571f64dd6
# Conflicts:
# src/validation.cpp
# src/validation.h
# src/wallet/feebumper.cpp
# src/wallet/rpcwallet.cpp
# src/wallet/wallet.h
# Conflicts:
# src/wallet/wallet.h
dc287c98f8 Squashed 'src/univalue/' changes from 51d3ab34ba..7890db99d6 (MarcoFalke)
Pull request description:
This removes the deprecated `std::pair` wrappers from univalue, so that they are not accidentally re-introduced in our code base.
Tree-SHA512: 46f6f7c7c7942a9e131d971c425cbde4159abcc1214235b61139ce97b174024e47b9c52e832cde89fbab9879f43d12c26b64d6def9907bd47883f1e574cf2e2e
e351a16a2a Remove reference to deprecated RPC call in build instructions (Michael Goldstein)
a6f16f1b1a Docs: Add disable-wallet section to OSX build instructions (Michael Goldstein)
Pull request description:
The `disable-wallet` section was mentioned in the `Berkeley DB` section of the OSX build instructions, but the section did not actually exist. This PR ports the section from the Unix build instructions.
Tree-SHA512: e32f10f3b92307325f2101e89d3e18c89346916e70117c208ad7441170c4aee65b636ea4f7dd1cb0ecf0e800c1aa7c37fa73125e69ecdd539bc862e651b79b16
# Conflicts:
# doc/build-unix.md
fab52675144480c96c5564da4650205f1a41b08e doxygen: Remove misleading checkpoints comment in CMainParams (MarcoFalke)
Pull request description:
This removes the checkpoints comment because it is misleading for two reasons:
* It shows up in the doxygen documentation of `CMainParams` https://dev.visucore.com/bitcoin/doxygen/class_c_main_params.html
* The comment refers to "strange transactions" in a block, which are not specified further. Transactions in blocks are always consensus-valid or rejected as consensus-invalid.
Also sort the includes with `clang-format`, as the file is touched anyway.
Tree-SHA512: b75f38dd0422b9310218307cbaa4dd5afa7579612d7dcdf781b8f25626f79c11e090dbcc83a05571f4418220c1a005f6254a9c461534d517ccecf7f1920be6be
# Conflicts:
# src/chainparams.cpp
e9a78e9b3b doc: Change documentation for =0 for non-boolean options (Wladimir J. van der Laan)
Pull request description:
PR #12713 changed the interpretation for negation of non-boolean options (e.g. -noconnect) to no longer set the option to `0`, but to remove it from the options.
I think this is better because it gets rid of the special meaning of `'0'`.
However it needs to be documented. I attempt to do so in this PR.
Addresses #14064.
There might be options I missed, please help check:
- `-connect`
- `-proxy`
- `-onion`
- `-debug`
- `-debuglogfile`
Needs a manpage update.
Tree-SHA512: a69e63e04a6c8bf6f61a58ddc0f5ebd4b9af7a2e0ea5174e668f2e3edd31a541910a125605ca4bfccf3aca6e59267d98a66de9d1e73650f48c8a1828d315d35d
# Conflicts:
# src/init.cpp
5d62dcf9cfb5c0b2511c10667ed47ec3b3610d72 lint: Make sure we read the command line inputs using utf-8 decoding in python (Chun Kuan Lee)
Pull request description:
Make sure we read the command line inputs using utf-8 decoding in python
occurred from travis cron job:
contrib/verify-commits/verify-commits.py should run with utf-8, otherwise it would raise UnicodeDecodeError
`UnicodeDecodeError: 'ascii' codec can't decode byte 0xe2 in position 744: ordinal not in range(128)`
Tree-SHA512: 90e4ad57fdbbbecb0a21fc2d2b03a04f5ef125e54124719ef36e5a85326930b732b47534757a7c3a8730096f3947b009ec898191928b5c2d38f9f4b3e37db48d
# Conflicts:
# contrib/devtools/optimize-pngs.py
68400d8b96 tests: Use explicit imports (practicalswift)
Pull request description:
Enable automatic detection of undefined names in Python tests scripts. Remove wildcard imports.
Wildcard imports make it unclear which names are present in the namespace, confusing both readers and many automated tools.
An additional benefit of not using wildcard imports in tests scripts is that readers of a test script then can infer the rough testing scope just by looking at the imports.
Before this commit:
```
$ contrib/devtools/lint-python.sh | head -10
./test/functional/feature_rbf.py:8:1: F403 'from test_framework.util import *' used; unable to detect undefined names
./test/functional/feature_rbf.py:9:1: F403 'from test_framework.script import *' used; unable to detect undefined names
./test/functional/feature_rbf.py:10:1: F403 'from test_framework.mininode import *' used; unable to detect undefined names
./test/functional/feature_rbf.py:15:12: F405 bytes_to_hex_str may be undefined, or defined from star imports: test_framework.mininode, test_framework.script, test_framework.util
./test/functional/feature_rbf.py:17:58: F405 CScript may be undefined, or defined from star imports: test_framework.mininode, test_framework.script, test_framework.util
./test/functional/feature_rbf.py:25:13: F405 COIN may be undefined, or defined from star imports: test_framework.mininode, test_framework.script, test_framework.util
./test/functional/feature_rbf.py:26:31: F405 satoshi_round may be undefined, or defined from star imports: test_framework.mininode, test_framework.script, test_framework.util
./test/functional/feature_rbf.py:26:60: F405 COIN may be undefined, or defined from star imports: test_framework.mininode, test_framework.script, test_framework.util
./test/functional/feature_rbf.py:30:41: F405 satoshi_round may be undefined, or defined from star imports: test_framework.mininode, test_framework.script, test_framework.util
./test/functional/feature_rbf.py:30:68: F405 COIN may be undefined, or defined from star imports: test_framework.mininode, test_framework.script, test_framework.util
$
```
After this commit:
```
$ contrib/devtools/lint-python.sh | head -10
$
```
Tree-SHA512: 3f826d39cffb6438388e5efcb20a9622ff8238247e882d68f7b38609877421b2a8e10e9229575f8eb6a8fa42dec4256986692e92922c86171f750a0e887438d9
4b7091a842 Replace median fee rate with feerate percentiles (Marcin Jachymiak)
Pull request description:
Currently, the `medianfeerate` statistic is calculated from the feerate of the middle transaction of a list of transactions sorted by feerate.
This PR instead uses the value of the 50th percentile weight unit in the block, and also calculates the feerate at the 10th, 25th, 75th, and 90th percentiles. This more accurately corresponds with what is generally meant by median feerate.
Tree-SHA512: 59255e243df90d7afbe69839408c58c9723884b8ab82c66dc24a769e89c6d539db1905374a3f025ff28272fb25a0b90e92d8101103e39a6d9c0d60423a596714
e306be742932d4ea5aca0ea4768e54b2fc3dc6a0 Use 72 byte dummy signatures when watching only inputs may be used (Andrew Chow)
48b1473c898129a99212e2db36c61cf93625ea17 Use 71 byte signature for DUMMY_SIGNATURE_CREATOR (Andrew Chow)
18dfea0dd082af18dfb02981b7ee1cd44d514388 Always create 70 byte signatures with low R values (Andrew Chow)
Pull request description:
When creating signatures for transactions, always make one which has a 32 byte or smaller R and 32 byte or smaller S value. This results in signatures that are always less than 71 bytes (32 byte R + 32 byte S + 6 bytes DER + 1 byte sighash) with low R values. In most cases, the signature will be 71 bytes.
Because R is not mutable in the same way that S is, a low R value can only be found by trying different nonces. RFC 6979 for deterministic nonce generation has the option to specify additional entropy, so we simply use that and add a uin32_t counter which we increment in order to try different nonces. Nonces are sill deterministically generated as the nonce used will the be the first one where the counter results in a nonce that results in a low R value. Because different nonces need to be tried, time to produce a signature does increase. On average, it takes twice as long to make a signature as two signatures need to be created, on average, to find one with a low R.
Having a fixed size signature makes size calculations easier and also saves half a byte of transaction size, on average.
DUMMY_SIGNATURE_CREATOR has been modified to produce 71 byte dummy signatures instead of 72 byte signatures.
Tree-SHA512: 3cd791505126ce92da7c631856a97ba0b59e87d9c132feff6e0eef1dc47768e81fbb38bfbe970371bedf9714b7f61a13a5fe9f30f962c81734092a4d19a4ef33
