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as a standard output script for spending
75648cea5a9032b3d388cbebacb94d908e08924e test: add P2A ProduceSignature coverage (Greg Sanders)
7998ce6b20fba62c022228355907b612ba6692e1 Add release note for P2A output feature (Greg Sanders)
71c9b02a04742eeecab14aae4697b1a3eb51ff7f test: add P2A coverage for decodescript (Greg Sanders)
1349e9ec1558484f2912a2444c410170fcec8745 test: Add anchor mempool acceptance test (Greg Sanders)
9d892099378b2ad5f52220403bdeae43c61d6955 policy: stop 3rd party wtxid malleability of anchor spend (Greg Sanders)
b60aaf8b239978947d2b0e3f56e7d8a4092d7570 policy: make anchor spend standard (Greg Sanders)
455fca86cfada1823aa28615b5683f9dc73dbb9a policy: Add OP_1 <0x4e73> as a standard output type (Greg Sanders)
Pull request description:
This is a sub-feature taken out of the original proposal for ephemeral anchors #30239
This PR makes *spending* of `OP_1 <0x4e73>` (i.e. `bc1pfeessrawgf`) standard. Creation of this output type is already standard.
Any future witness output types are considered relay-standard to create, but not to spend. This preserves upgrade hooks, such as a completely new output type for a softfork such as BIP341. It also gives us a bit of room to use a new output type for policy uses.
This particular sized witness program has no other known use-cases (https://bitcoin.stackexchange.com/a/110664/17078), s it affords insufficient cryptographic security for a secure commitment to data, such as a script or a public key. This makes this type of output "keyless", or unauthenticated.
As a witness program, the `scriptSig` of the input MUST be blank, by BIP141. This helps ensure txid-stability of the spending transaction, which may be required for smart contracting wallets. If we do not use segwit, a miner can simply insert an `OP_NOP` in the `scriptSig` without effecting the result of program execution.
An additional relay restriction is to disallow non-empty witness data, which an adversary may use to penalize the "honest" transactor when RBF'ing the transaction due to the incremental fee requirement of RBF rules.
The intended use-case for this output type is to "anchor" the transaction with a spending child to bring exogenous CPFP fees into the transaction package, encouraging the inclusion of the package in a block. The minimal size of creation and spending of this output makes it an attractive contrast to outputs like `p2sh(OP_TRUE)` and `p2wsh(OP_TRUE)` which
are significantly larger in vbyte terms.
Combined with TRUC transactions which limits the size of child transactions significantly, this is an attractive option for presigned transactions that need to be fee-bumped after the fact.
ACKs for top commit:
sdaftuar:
utACK 75648cea5a9032b3d388cbebacb94d908e08924e
theStack:
re-ACK 75648cea5a9032b3d388cbebacb94d908e08924e
ismaelsadeeq:
re-ACK 75648cea5a9032b3d388cbebacb94d908e08924e via [diff](https://github.com/bitcoin/bitcoin/compare/e7ce6dc070c0319cbb868d41cadd836b2e6ca9db..75648cea5a9032b3d388cbebacb94d908e08924e)
glozow:
ACK 75648cea5a9032b3d388cbebacb94d908e08924e
tdb3:
ACK 75648cea5a9032b3d388cbebacb94d908e08924e
Tree-SHA512: d529de23d20857e6cdb40fa611d0446b49989eaafed06c28280e8fd1897f1ed8d89a4eabbec1bbf8df3d319910066c3dbbba5a70a87ff0b2967d5205db32ad1e
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TxidFromString was deprecated due to missing 64-character length-check
and hex-check, replace it with the more robust Txid::FromHex.
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These outputs are called anchors, and allow
key-less anchor spends which are vsize-minimized
versus keyed anchors which require larger outputs
when creating and inputs when spending.
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Prior to this, passing string_view::data() into uint256S() meant the latter would only receive the a naked char* pointer and potentially scan past the string_view::length() until it found a null terminator (or some other non-hex character).
Appears to have been a fully dormant bug as callers were either passing a string literal or std::string directly to TxidFromFromString(), meaning null terminator always existed at pointer[length()]. Bug existed since original merge of TxidFromString(), discussed in https://github.com/bitcoin/bitcoin/pull/28922#discussion_r1404437378.
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Move its ownership to the ChainstateManager class.
Next to simplifying usage of the kernel library by no longer requiring
manual setup of the cache prior to using validation code, it also slims
down the amount of memory allocated by BasicTestingSetup.
Use this opportunity to make SignatureCache RAII styled
Co-authored-by: Ryan Ofsky <ryan@ofsky.org>
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c7376babd19d0c858fef93ebd58338abd530c1f4 doc: Clarify distinction between util and common libraries in libraries.md (Ryan Ofsky)
4f74c59334d496f28e1a5c0d84c412f9020b366f util: Move util/string.h functions to util namespace (Ryan Ofsky)
4d05d3f3b42a41525aa6ec44b90f543dfab53ecf util: add TransactionError includes and namespace declarations (Ryan Ofsky)
680eafdc74021c1e0893c3a62404e607fd4724f5 util: move fees.h and error.h to common/messages.h (Ryan Ofsky)
02e62c6c9af4beabaeea58fb1ea3ad0dc5094678 common: Add PSBTError enum (Ryan Ofsky)
0d44c44ae33434f366229c612d6edeedf7658963 util: move error.h TransactionError enum to node/types.h (Ryan Ofsky)
9bcce2608dd2515dc35a0f0866abc9d43903c795 util: move spanparsing.h to script/parsing.h (Ryan Ofsky)
6dd2ad47922694d2ab84bad4dac9dd442c5df617 util: move spanparsing.h Split functions to string.h (Ryan Ofsky)
23cc8ddff472d259605d7790ba98a1900e77efab util: move HexStr and HexDigit from util to crypto (TheCharlatan)
6861f954f8ff42c87ad638037adae86a5bd89600 util: move util/message to common/signmessage (Ryan Ofsky)
cc5f29fbea15d33e4d1aa95591253c6b86953fe7 build: move memory_cleanse from util to crypto (Ryan Ofsky)
5b9309420cc9721a0d5745b6ad3166a4bdbd1508 build: move chainparamsbase from util to common (Ryan Ofsky)
ffa27af24da81a97d6c4912ae0e10bc5b6f17f69 test: Add check-deps.sh script to check for unexpected library dependencies (Ryan Ofsky)
Pull request description:
Remove `fees.h`, `errors.h`, and `spanparsing.h` from the util library. Specifically:
- Move `Split` functions from `util/spanparsing.h` to `util/string.h`, using `util` namespace for clarity.
- Move remaining spanparsing functions to `script/parsing.h` since they are used for descriptor and miniscript parsing.
- Combine `util/fees.h` and `util/errors.h` into `common/messages.h` so there is a place for simple functions that generate user messages to live, and these functions are not part of the util library.
Motivation for this change is that the util library is a dependency of the kernel, and we should remove functionality from util that shouldn't be called by kernel code or kernel applications. These changes should also improve code organization and make functions easier to discover. Some of these same moves are (or were) part of #28690, but did not help with code organization, or made it worse, so it is better to move them and clean them up in the same PR so code only has to change one time.
ACKs for top commit:
achow101:
ACK c7376babd19d0c858fef93ebd58338abd530c1f4
TheCharlatan:
Re-ACK c7376babd19d0c858fef93ebd58338abd530c1f4
hebasto:
re-ACK c7376babd19d0c858fef93ebd58338abd530c1f4.
Tree-SHA512: 5bcef16c1255463b1b69270548711e7ff78ca0dd34e300b95e3ca1ce52ceb34f83d9ddb2839e83800ba36b200de30396e504bbb04fa02c6d0c24a16d06ae523d
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429ec1aaaaafab150f11e27fcf132a99b57c4fc7 refactor: Rename CTransaction::nVersion to version (Ava Chow)
27e70f1f5be1f536f2314cd2ea42b4f80d927fbd consensus: Store transaction nVersion as uint32_t (Ava Chow)
Pull request description:
Given that the use of a transaction's nVersion is always as an unsigned int, it doesn't make sense to store it as signed and then cast it to unsigned everywhere it is used and displayed.
Since a few alternative implementations have recently been revealed to have made an error with this signedness that would have resulted in consensus failure, I think it makes sense for us to just make this always unsigned to make it clear that the version is treated as unsigned. This would also help us avoid future potential issues with signedness of this value.
I believe that this is safe and does not actually change what transactions would or would not be considered both standard and consensus valid. Within consensus, the only use of the version in consensus is in BIP68 validation which was already casting it to uint32_t. Within policy, although it is used as a signed int for the transaction version number check, I do not think that this change would change standardness. Standard transactions are limited to the range [1, 2]. Negative numbers would have fallen under the < 1 condition, but by making it unsigned, they are still non-standard under the > 2 condition.
Unsigned and signed ints are serialized and unserialized the same way so there is no change in serialization.
ACKs for top commit:
maflcko:
ACK 429ec1aaaaafab150f11e27fcf132a99b57c4fc7 🐿
glozow:
ACK 429ec1aaaa
shaavan:
ACK 429ec1aaaaafab150f11e27fcf132a99b57c4fc7 💯
Tree-SHA512: 0bcd92a245d7d16c3665d2d4e815a4ef28207ad4a1fb46c6f0203cdafeab1b82c4e95e4bdce7805d80a4f4a46074f6542abad708e970550d38a00d759e3dcef1
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In order to ensure that the change of nVersion to a uint32_t in the
previous commit has no effect, rename nVersion to version in this commit
so that reviewers can easily spot if a spot was missed or if there is a
check somewhere whose semantics have changed.
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Given that the use of a transaction's nVersion is always as an unsigned
int, it doesn't make sense to store it as signed and then cast it to
unsigned.
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There are no changes to behavior. Changes in this commit are all additions, and
are easiest to review using "git diff -U0 --word-diff-regex=." options.
Motivation for this change is to keep util functions with really generic names
like "Split" and "Join" out of the global namespace so it is easier to see
where these functions are defined, and so they don't interfere with function
overloading, especially since the util library is a dependency of the kernel
library and intended to be used with external code.
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29029df5c700e6940c712028303761d91ae15847 [doc] v3 signaling in mempool-replacements.md (glozow)
e643ea795e4b6fea4a6bbb3d72870ee6a4c836b1 [fuzz] v3 transactions and sigop-adjusted vsize (glozow)
1fd16b5c62f54c7f4c60122acd65d852f63d1e8b [functional test] v3 transaction submission (glozow)
27c8786ba918a42c860e6a50eaee9fdf56d7c646 test framework: Add and use option for tx-version in MiniWallet methods (MarcoFalke)
9a1fea55b29fe025355b06b45e3d77d192acc635 [policy/validation] allow v3 transactions with certain restrictions (glozow)
eb8d5a2e7d939dd3ee683486e98702079e0dfcc0 [policy] add v3 policy rules (glozow)
9a29d470fbb62bbb27d517efeafe46ff03c25f54 [rpc] return full string for package_msg and package-error (glozow)
158623b8e0726dff7eae4288138f1710e727db9c [refactor] change Workspace::m_conflicts and adjacent funcs/structs to use Txid (glozow)
Pull request description:
See #27463 for overall package relay tracking.
Delving Bitcoin discussion thread: https://delvingbitcoin.org/t/v3-transaction-policy-for-anti-pinning/340
Delving Bitcoin discussion for LN usage: https://delvingbitcoin.org/t/lightning-transactions-with-v3-and-ephemeral-anchors/418
Rationale:
- There are various pinning problems with RBF and our general ancestor/descendant limits. These policies help mitigate many pinning attacks and make package RBF feasible (see #28984 which implements package RBF on top of this). I would focus the most here on Rule 3 pinning. [1][2]
- Switching to a cluster-based mempool (see #27677 and #28676) requires the removal of CPFP carve out, which applications depend on. V3 + package RBF + ephemeral anchors + 1-parent-1-child package relay provides an intermediate solution.
V3 policy is for "Priority Transactions." [3][4] It allows users to opt in to more restrictive topological limits for shared transactions, in exchange for the more robust fee-bumping abilities that offers. Even though we don't have cluster limits, we are able to treat these transactions as having as having a maximum cluster size of 2.
Immediate benefits:
- You can presign a transaction with 0 fees (not just 1sat/vB!) and add a fee-bump later.
- Rule 3 pinning is reduced by a significant amount, since the attacker can only attach a maximum of 1000vB to your shared transaction.
This also enables some other cool things (again see #27463 for overall roadmap):
- Ephemeral Anchors
- Package RBF for these 1-parent-1-child packages. That means e.g. a commitment tx + child can replace another commitment tx using the child's fees.
- We can transition to a "single anchor" universe without worrying about package limit pinning. So current users of CPFP carve out would have something else to use.
- We can switch to a cluster-based mempool [5] (#27677 #28676), which removes CPFP carve out [6].
[1]: Original mailing list post and discussion about RBF pinning problems https://gist.github.com/glozow/25d9662c52453bd08b4b4b1d3783b9ff, https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2022-January/019817.html
[2]: A FAQ is "we need this for cluster mempool, but is this still necessary afterwards?" There are some pinning issues that are fixed here and not fully fixed in cluster mempool, so we will still want this or something similar afterward.
[3]: Mailing list post for v3 https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2022-September/020937.html
[4]: Original PR #25038 also contains a lot of the discussion
[5]: https://delvingbitcoin.org/t/an-overview-of-the-cluster-mempool-proposal/393/7
[6]: https://delvingbitcoin.org/t/an-overview-of-the-cluster-mempool-proposal/393#the-cpfp-carveout-rule-can-no-longer-be-supported-12
ACKs for top commit:
sdaftuar:
ACK 29029df5c700e6940c712028303761d91ae15847
achow101:
ACK 29029df5c700e6940c712028303761d91ae15847
instagibbs:
ACK 29029df5c700e6940c712028303761d91ae15847 modulo that
Tree-SHA512: 9664b078890cfdca2a146439f8835c9d9ab483f43b30af8c7cd6962f09aa557fb1ce7689d5e130a2ec142235dbc8f21213881baa75241c5881660f9008d68450
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Co-authored-by: Suhas Daftuar <sdaftuar@gmail.com>
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Making the `GenerateRandomKey` helper available to other modules via
key.{h.cpp} allows us to create random private keys directly at
instantiation of CKey, in contrast to the two-step process of creating
the instance and then having to call `MakeNewKey(...)`.
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5b3ea5fa2e7f6dc1c9161ed8b74c9be4bd1e92dd refactor: Move `{MAX,DEFAULT}_SCRIPTCHECK_THREADS` constants (Hennadii Stepanov)
6e17b3168072ab77ed7170ab81327c017877133a refactor: Make `CCheckQueue` non-copyable and non-movable explicitly (Hennadii Stepanov)
8111e74653dc5c93cb510672d99048c3f741d8dc refactor: Drop unneeded declaration (Hennadii Stepanov)
9cf89f7a5b81197e38f58b24be0793b28fe41477 refactor: Make `CCheckQueue` constructor start worker threads (Hennadii Stepanov)
d03eaacbcfb276fb638db1b423113ff43bd7ec41 Make `CCheckQueue` destructor stop worker threads (Hennadii Stepanov)
be4ff3060b7b43b496dfb5a2c02b114b2b717106 Move global `scriptcheckqueue` into `ChainstateManager` class (Hennadii Stepanov)
Pull request description:
This PR:
- makes `CCheckQueue` RAII-styled
- gets rid of the global `scriptcheckqueue`
- fixes https://github.com/bitcoin/bitcoin/issues/25448
The previous attempt was in https://github.com/bitcoin/bitcoin/pull/18731.
ACKs for top commit:
martinus:
ACK 5b3ea5fa2e7
achow101:
ACK 5b3ea5fa2e7f6dc1c9161ed8b74c9be4bd1e92dd
TheCharlatan:
ACK 5b3ea5fa2e7f6dc1c9161ed8b74c9be4bd1e92dd
Tree-SHA512: 45cca846e7ed107e3930149f0b616ddbaf2648d6cde381f815331b861b5d67ab39e154883ae174b8abb1dae485bc904318c50c51e5d6b46923d89de51c5eadb0
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Since script/standard only contains things that are used by the Solver
and its callers, rename the files to script/solver.
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helper, dedupe add_coin
4275195606e6f42466d9a8ef766b3035833df4d5 De-duplicate add_coin methods to a test util helper (Jon Atack)
9d92c3d7f42c18939a9a6aa1ee185f1c958360a0 Create InsecureRandMoneyAmount() test util helper (Jon Atack)
81f5ade2a324167c03c5ce765a26bd42ed652723 Move random test util code from setup_common to random (Jon Atack)
Pull request description:
- Move random test utilities from `setup_common` to a new `random` file, as many tests don't use this code.
- Create a helper to generate semi-random CAmounts up to `MONEY_RANGE` rather than only uint32, and use the helper in the unit tests.
- De-duplicate a shared `add_coin` method by extracting it to a `coins` test utility.
ACKs for top commit:
pinheadmz:
ACK 4275195606e6f42466d9a8ef766b3035833df4d5
achow101:
ACK 4275195606e6f42466d9a8ef766b3035833df4d5
john-moffett:
ACK 4275195606e6f42466d9a8ef766b3035833df4d5
Tree-SHA512: 3ed974251149c7417f935ef2f8865aa0dcc33b281b47522b0f96f1979dff94bb8527957f098fe4d210f40d715c00f29512f2ffe189097102229023b7284a3a27
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6c7a17a8e0eec377f83ed1399f003ae70b898270 psbt: support externally provided preimages for Miniscript satisfaction (Antoine Poinsot)
840a396029316896beda46600aec3c1af09a899c qa: add a "smart" Miniscript fuzz target (Antoine Poinsot)
17e3547241d593bc92c5c6b36c54284d9d9f3feb qa: add a fuzz target generating random nodes from a binary encoding (Antoine Poinsot)
611e12502a5887ffb751bb92fadaa334d484824b qa: functional test Miniscript signing with key and timelocks (Antoine Poinsot)
d57b7f2021d2369f6e88cdf0f562aab27c51beaf refactor: make descriptors in Miniscript functional test more readable (Antoine Poinsot)
0a8fc9e200b5018c1efd6f9126eb405ca0beeea3 wallet: check solvability using descriptor in AvailableCoins (Antoine Poinsot)
560e62b1e221832ae99ff8684559a7b8f9df84a7 script/sign: signing support for Miniscripts with hash preimage challenges (Antoine Poinsot)
a2f81b6a8f1ff3b0750711409c7538812a52ef40 script/sign: signing support for Miniscript with timelocks (Antoine Poinsot)
61c6d1a8440db09c44d7fd367a6f2c641ea93d40 script/sign: basic signing support for Miniscript descriptors (Antoine Poinsot)
4242c1c52127df3a24be0c15b88d4fc463af04fc Align 'e' property of or_d and andor with website spec (Pieter Wuille)
f5deb417804b9f267830bd40177677987df4526d Various additional explanations of the satisfaction logic from Pieter (Pieter Wuille)
22c5b00345063bdeb8b6d3da8b5692d18f92bfb7 miniscript: satisfaction support (Antoine Poinsot)
Pull request description:
This makes the Miniscript descriptors solvable.
Note this introduces signing support for much more complex scripts than the wallet was previously able to solve, and the whole tooling isn't provided for a complete Miniscript integration in the wallet. Particularly, the PSBT<->Miniscript integration isn't entirely covered in this PR.
ACKs for top commit:
achow101:
ACK 6c7a17a8e0eec377f83ed1399f003ae70b898270
sipa:
utACK 6c7a17a8e0eec377f83ed1399f003ae70b898270 (to the extent that it's not my own code).
Tree-SHA512: a71ec002aaf66bd429012caa338fc58384067bcd2f453a46e21d381ed1bacc8e57afb9db57c0fb4bf40de43b30808815e9ebc0ae1fbd9e61df0e7b91a17771cc
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Preimages must be externally provided (typically, via a PSBT).
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as many of the unit tests don't use this code
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types except bare multisig
b093f5619f8f9b7d63ee60ff04de00b907b13d64 Fill out dust limit unit test for known types except bare multisig (Greg Sanders)
Pull request description:
Having the constants checked explicitly in a single spot helps with possible regressions and also useful for documentation.
In addition, add a check for undefined v1 witness programs.
ACKs for top commit:
theStack:
Code-review ACK b093f5619f8f9b7d63ee60ff04de00b907b13d64
MarcoFalke:
review ACK b093f5619f8f9b7d63ee60ff04de00b907b13d64 🥉
Tree-SHA512: 1421f75471739d29b9ef59b0a925b6b07e4e9af92822dbe56eedfb590be9a00fb0c34312146c7c1b5211906461ed00bfa2eb53c88595c6e5a27694b2dc21df38
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-BEGIN VERIFY SCRIPT-
./contrib/devtools/copyright_header.py update ./
-END VERIFY SCRIPT-
Commits of previous years:
- 2021: f47dda2c58b5d8d623e0e7ff4e74bc352dfa83d7
- 2020: fa0074e2d82928016a43ca408717154a1c70a4db
- 2019: aaaaad6ac95b402fe18d019d67897ced6b316ee0
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unnecessarily copying objects and enable two clang-tidy checks
ae7ae36d311a869b3bda41d29dc0e47fade77d28 tidy: Enable two clang-tidy checks (Aurèle Oulès)
081b0e53e3adca7ea57d23e5fcd9db4b86415a72 refactor: Make const refs vars where applicable (Aurèle Oulès)
Pull request description:
I added const references to some variables to avoid unnecessarily copying objects.
Also added two clang-tidy checks : [performance-for-range-copy](https://releases.llvm.org/11.1.0/tools/clang/tools/extra/docs/clang-tidy/checks/performance-for-range-copy.html) and [performance-unnecessary-copy-initialization](https://releases.llvm.org/12.0.0/tools/clang/tools/extra/docs/clang-tidy/checks/performance-unnecessary-copy-initialization.html).
ACKs for top commit:
vasild:
ACK ae7ae36d311a869b3bda41d29dc0e47fade77d28
MarcoFalke:
review ACK ae7ae36d311a869b3bda41d29dc0e47fade77d28
Tree-SHA512: f6ac6b0cd0eee1e0c34d2f186484bc0f7ec6071451cccb33fa88a67d93d92b304e2fac378b88f087e94657745bca4e966dbc443759587400eb01b1f3061fde8c
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Apart from tests, it is only used in one place, so there is no need for
an alias.
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This avoids initializing variables with the copy-constructor of a
non-trivially copyable type.
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-BEGIN VERIFY SCRIPT-
sed -i 's|\<get_int64\>|getInt<int64_t>|g' $(git grep -l get_int ':(exclude)src/univalue')
sed -i 's|\<get_int\>|getInt<int>|g' $(git grep -l get_int ':(exclude)src/univalue')
-END VERIFY SCRIPT-
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This helper uses spanparsing::Split internally and enables to replace
all calls to boost::split where only a single separator is passed.
Co-authored-by: Martin Ankerl <Martin.Ankerl@gmail.com>
Co-authored-by: MarcoFalke <falke.marco@gmail.com>
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-BEGIN VERIFY SCRIPT-
./contrib/devtools/copyright_header.py update ./
-END VERIFY SCRIPT-
Commits of previous years:
* 2020: fa0074e2d82928016a43ca408717154a1c70a4db
* 2019: aaaaad6ac95b402fe18d019d67897ced6b316ee0
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named arguments (tests only)
fa00447442f22a24e5ca5fc538d0bf7bef575544 scripted-diff: Use clang-tidy syntax for C++ named arguments (MarcoFalke)
fae13c39896898aef2281433af143c22d8b3a3b4 doc: Use clang-tidy comments in crypto_tests (MarcoFalke)
Pull request description:
Incorrect named args are source of bugs, like #22979.
To allow them being checked by `clang-tidy`, use a format it can understand.
ACKs for top commit:
shaavan:
ACK fa00447442f22a24e5ca5fc538d0bf7bef575544
rajarshimaitra:
ACK https://github.com/bitcoin/bitcoin/pull/23546/commits/fa00447442f22a24e5ca5fc538d0bf7bef575544
jonatack:
ACK fa00447442f22a24e5ca5fc538d0bf7bef575544
fanquake:
ACK fa00447442f22a24e5ca5fc538d0bf7bef575544
Tree-SHA512: 4d23a8363da81dfea21a4cd8516ab5e0dc70119e4d503f3f240f38573218b2c2e84083b97e956c62942d78b2f17490f8b3b2e8077d257644fda1d901e2b80507
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-BEGIN VERIFY SCRIPT-
perl -0777 -pi -e 's:((\(|\{|,)(\n| )*)\/\* ?([^=* ]+) ?\*\/ ?:\1/*\4=*/:g' $( git ls-files ./src/test ./src/wallet/test )
-END VERIFY SCRIPT-
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When calculating the fee for a given tx size from a fee rate, we should
always round up to the next satoshi. Otherwise, if we round down (via
truncation), the calculated fee may result in a fee with a feerate
slightly less than targeted.
This is particularly important for coin selection as a slightly lower
feerate than expected can result in a variety of issues.
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Move amount.h to consensus/amount.h.
Renames, adds missing and removes uneeded includes.
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