We recently added the `Sequence` type and we explicitly did not include
relative lock time logic.
Add a new module `relative` and new type `LockTime` to represent
relative lock times as defined by BIP 68.
In preparation for adding a relative lock time type move the `locktime`
module to a new module called `absolute`. Use qualified path for
locktime types (e.g. `absolute::PackedLockTime`) to improve readability.
cc2c67fc2d Move sighash types to the sighash module (Tobin C. Harding)
7c040f4437 Refactor imports (Tobin C. Harding)
29f21d6ff5 Add additional sighash related pubic exports (Tobin C. Harding)
Pull request description:
This is non-urgent work, something I've wanted to do for months now, please only review at your leisure :)
Currently we have a bunch of sighash types defined in the `transaction` module and we have a newer `sighash` module that defines a bunch of related types. This is an artifact of the development process as we added the new types. If we put things that are related together it makes it easier for devs to find their way around the library and grok the code.
Move all the sighash types from the `blockdata::transaction` module to the `sighash` module.
The first two patches are preparatory cleanup.
### Labels
I added "API break" because I move the types without adding a re-export from the original place. I believe this is correct because we are, hopefully, aiming to de-couple the public API from the internal module structure so there is going to be a load more of this.
ACKs for top commit:
apoelstra:
ACK cc2c67fc2d
sanket1729:
ACK cc2c67fc2d
Tree-SHA512: 62a586b63c388baf91655a9afc8595394565d6ea6eb9aa3bd4746f899c140f332999e886cd85b098ec01304d2b96a310848d42d5ae38af476d3a26496576e36c
abc014a079 Move rustdoc above attribute (Tobin C. Harding)
e9230019eb Implement std::error::Error::source for MerkleBlockError (Tobin C. Harding)
613f1cf2d5 Implement std::error::Error::source for bip152 (Tobin C. Harding)
a37ab82503 Add non_exhaustive to _all_ errors (Tobin C. Harding)
Pull request description:
Do error cleanups, and add a script to help find missing `non_exhaustive` on error types
- Patch 1: Audit the codebase and put `non_exhaustive` on all error types.
- Patch 2: Implement `std::error::Error::source` for `bip152::Error`
- Patch 3: Implement `Display` and `std::error::Error::source` for `MerkleBlockError`
- Patch 4: Move rustdocs to above attributes on one error type
- ~Patch 5: Add a python script to `contrib` that checks the codebase for missing non exhaustive on the line above the results of regex `pub enum .*Error`~
I removed the Python script patch, I can't be bothered working on this for now but the clean ups and `non_exhaustive` additions are useful IMO.
### labels
- I added 'API break', I think the `non_exhaustive` addition requires major bump but not sure?
- release notes mention is just for the `non_exhaustive` patch.
ACKs for top commit:
Kixunil:
ACK abc014a079
apoelstra:
ACK abc014a079
Tree-SHA512: 16ea15014eae97de7ac9cca1e9b76304aa3702a98cde577c2d71343022f840d3b33a39d2ab6d3fba0f0f1ebaa1631a0595eea1d794ba9727fe6ccfcf08e2feae
Currently we have a bunch of sighash types defined in the `transaction`
module and we have a newer `sighash` module that defines a bunch of
related types. This is kruft from the development process as we added
the new types. If we put things that are related together it makes it
easier for devs to find their way around the library and grok the code.
Move all the sighash types from the `blockdata::transaction` module to
the `sighash` module.
Refactor only, no logic changes.
We have a bunch of clippy warnings on master, at least one of them is
from a patch dated from March, before we ran clippy on CI.
Fix clippy warnings
- warning: accessing first element with `self.0.get(0)`
- warning: deref on an immutable reference
- warning: you are deriving `PartialEq` and can implement `Eq`
All one patch because clippy has to run cleanly for each patch on CI
now.
Please note the `Eq` change, adding this derive is an API change.
When we introduced the `SighashCache` we put encoding and sighash code
for segwit (v0 and taproo) in the `sighash` module. We also added
methods for legacy inputs that wrapped calls to encode/sighash methods
in the `transaction` module. This is confusing for a couple of reasons
- When devs read `Transaction` there are two methods that apparently
enable encodeing tx data and calculating the sighash but there is no
indication that these methods are only for legacy inputs.
- Ocne devs work out that segwit inputs have to be handled by methods on
the `SighashCache` it is not obvious why the methods on `Transaction`
exist at all.
Move the legacy encode/sighash code over to the `sighash` module and
deprecate the old methods. (Includes moving unit tests.)
This is follow up work to the recent addition of the `Sequence` type. We
do not need to keep a public integer const for `MAX_SEQUENCE` because we
offer the `Sequenc::MAX` associated type.
Use the all-bits-set u64 directly in the associated type `Sequence::MAX`.
Clippy gives a warning about `wrong_self_convention` because we consume
self in a method called `is_*`. We have to consume self because the
object has a generic `E` (error type) that does not implement `Copy`.
Turns out by default clippy does not lint certain parts of the public
API. Specifically, by setting
avoid-breaking-exported-api = false
we can get clippy to lint the public API for various things including
`wrong_self_convention`.
Clippy emits:
warning: methods with the following characteristics: (`to_*` and `self`
type is `Copy`) usually take `self` by value
As suggested, take `self` by value for methods named `to_*`.
`Sequence` didn't have `FromStr` nor `TryFrom<{stringly type}>`
implemented by accident. This moves a macro for implementing them from
`locktime` module to the `parse` module, renames it for clarity and uses
it to implement parsing for `Sequence`.
When debugging parsing errors it's very useful to know some context:
what the input was and what integer type was parsed. `ParseIntError`
from `core` doesn't contain this information.
In this commit a custom `ParseIntError` type is crated that carries the
one from `core` as well as additional information. Its `Display`
implementation displays this additional information as a well-formed
English sentence to aid users with understanding the problem. A helper
function parses any integer type from common string types returning the
new `ParseIntError` type on error.
To clean up the error code a bit some new macros are added and used.
New modules are added to organize the types, functions and macros.
Closes#1113
Add a `LockTime` type to hold the nLockTime `u32` value. Use it in
`Transaction` for `lock_time` instead of a `u32`. Make it public so this
new type can be used by rust-miniscript and other downstream projects.
Add a `PackedLockTime` type that wraps a raw `u32` and derives `Ord`,
this type is for wrapping a consensus lock time value for nesting in
types that would like to derive `Ord`.
For internal macros used only in this crate we do not need to use
`macro_use` and pollute the top level namespace now that we have edition
2018. We can add a `pub(crate) use` statement to each and then path
imports work for the macros like normal types.
73bc2bb058 Remove leading colons from ::core::cmp::Ordering (Tobin C. Harding)
bffe0e840d Remove _most_ leading double colons (Tobin C. Harding)
Pull request description:
Leading double colons are a relic of edition 2015. Attempt to remove _all_ leading double colons (assuming I didn't miss any).
- Patch 1 is done mechanically so it can be repeated by reviewers, just search-and-replace ' ::' with '::' (note the leading space).
- Patch 2 does a single other instance of leading `::`
ACKs for top commit:
apoelstra:
ACK 73bc2bb058
sanket1729:
utACK 73bc2bb058.
Tree-SHA512: 8f7aafdda1aed5b69dcc83f544e65085dfec6590765839f0a6f259b99872805d1f00602fd9deac05c80a5cac3bc222d454dde0117dff4484e5cd34ea930fdfa1
e34bc538c3 Add new type for sequence (Noah Lanson)
Pull request description:
#1082
Created a new type for txin sequence field with methods to create sequences with relative time locks from block height or time units.
ACKs for top commit:
Kixunil:
ACK e34bc538c3
tcharding:
ACK e34bc538c3
apoelstra:
ACK e34bc538c3
Tree-SHA512: 6605349d0312cc36ef9a4632f954e59265b3ba5cfd437aa88a37672fe479688aa4a3eff474902f8cc55848efe55caf3f09f321b3a62417842bfc3ec365c40688
f3b2120ec9 Create configuration conditional bench (Tobin C. Harding)
f60c92ca58 Add informative error message to DO_BENCH (Tobin C. Harding)
c6d5a12b60 Add cargo/rustc sanity calls (Tobin C. Harding)
34d5a3141d Put triple ticks on their own line (Tobin C. Harding)
Pull request description:
Currently we are unable to build with all features enabled with a non-nightly toolchain, this is because of the use of
`#![cfg_attr(all(test, feature = "unstable"), feature(test))]`
which causes the following error when building:
error[E0554]: `#![feature]` may not be used on the stable release channel
The "unstable" feature is used to guard bench mark modules, this is widely suggested online but there is a better way.
When running the bench marks use the following incantation:
`RUSTFLAGS='--cfg=bench' cargo bench`
This creates a configuration conditional "bench" that can be used to guard the bench mark modules.
```
#[cfg(bench)]
mod benches {
...
}
```
ACKs for top commit:
Kixunil:
ACK f3b2120ec9
apoelstra:
ACK f3b2120ec9
Tree-SHA512: 7ec2a501a30bfe2ce72601077cd675cf5e5ac2f0f93f97fc7e83cb7401606b69ae909b35bfc0ace8bd1ea771ca4fba70e2ad9ac9ba26f2b6e371494cf694c0a8
Currently we are unable to build with all features enabled with a
non-nightly toolchain, this is because of the use of
`#![cfg_attr(all(test, feature = "unstable"), feature(test))]`
which causes the following error when building:
error[E0554]: `#![feature]` may not be used on the stable release
channel
The "unstable" feature is used to guard bench mark modules, this is
widely suggested online but there is a better way.
When running the bench marks use the following incantation:
`RUSTFLAGS='--cfg=bench' cargo bench`
This creates a configuration conditional "bench" that can be used to
guard the bench mark modules.
#[cfg(bench)]
mod benches {
...
}
91ff2f628c Introduce SPDX license identifiers (Tobin C. Harding)
Pull request description:
When `rust-bitcoin` was started in 2014 the SPDX license list and short identifiers where not a thing. Now that we have short identifiers and they are gaining popularity in other projects we can consider using them.
- Add links to the SPDX website in the readme
- Shorten the author section to a single line
- Remove all the licence information in each file and replace it with an
SPDX ID (see https://spdx.dev/ids/#how)
Of note:
- If the author of a file is explicitly listed, maintain this information
- If the 'author' is listed as the generic 'Rust Bitcoin developers' just remove the attribution, this is implicit. This does loose the date info but that can be seen at any time from the git index using
`git log --follow --format=%ad --date default <FILE> | tail -1`
apoelstra, please confirm that I'm not treading on your toes here, especially, are you ok with the new 'written by' string format?
### Ref
- https://spdx.dev/ids/#how
- https://spdx.org/licenses/CC0-1.0.html
- https://spdx.dev/ids/
ACKs for top commit:
apoelstra:
ACK 91ff2f628c
sanket1729:
ACK 91ff2f628c. I am also in IDGAF camp, but I like more red lines in diff.
Kixunil:
ACK 91ff2f628c
Tree-SHA512: ca8aac00f015c18ec18de83dfeb50dd6f4f840653c7def85daa2436a339021ada5f3c34ad0cdf6b18e3e39c45a6d58a8313742e4001d467785b10eee7fdbc938
Leading double colons are a relic of edition 2015. Remove all leading
double colons that follow a space, done like this so that reviewers can
do the same and verify the diff. Done with
search-and-replace ' ::' '::'
And, for the record:
```bash
function search-and-replace() {
if (($# != 2))
then
echo "Usage: $0 <this> <that>"
return
fi
local this="$1"
local that="$2"
for file in $(git grep -l "$this")
do
perl -pi -e "s/$this/$that/g" "$file"
done
}
```
1fea098dfb Support unsized `R` and `W` in consensus encode/decode (Dawid Ciężarkiewicz)
a24a3b0194 Forward `consensus_decode` to `consensus_decode_from_finite_reader` (Dawid Ciężarkiewicz)
9c754ca4de Take Writer/Reader by `&mut` in consensus en/decoding (Dawid Ciężarkiewicz)
Pull request description:
Fix#1020 (see more relevant discussion there)
This definitely makes the amount of generics compiler
has to generate by avoding generating the same functions
for `R`, `&mut R`, `&mut &mut R` and so on.
old:
```
> ls -al target/release/deps/bitcoin-07a9dabf1f3e0266
-rwxrwxr-x 1 dpc dpc 9947832 Jun 2 22:42 target/release/deps/bitcoin-07a9dabf1f3e0266
> strip target/release/deps/bitcoin-07a9dabf1f3e0266
> ls -al target/release/deps/bitcoin-07a9dabf1f3e0266
-rwxrwxr-x 1 dpc dpc 4463024 Jun 2 22:46 target/release/deps/bitcoin-07a9dabf1f3e0266
```
new:
```
> ls -al target/release/deps/bitcoin-07a9dabf1f3e0266
-rwxrwxr-x 1 dpc dpc 9866800 Jun 2 22:44 target/release/deps/bitcoin-07a9dabf1f3e0266
> strip target/release/deps/bitcoin-07a9dabf1f3e0266
> ls -al target/release/deps/bitcoin-07a9dabf1f3e0266
-rwxrwxr-x 1 dpc dpc 4393392 Jun 2 22:45 target/release/deps/bitcoin-07a9dabf1f3e0266
```
In the unit-test binary itself, it saves ~100KB of data.
I did not expect much performance gains, but turn out I was wrong(*):
old:
```
test blockdata::block::benches::bench_block_deserialize ... bench: 1,072,710 ns/iter (+/- 21,871)
test blockdata::block::benches::bench_block_serialize ... bench: 191,223 ns/iter (+/- 5,833)
test blockdata::block::benches::bench_block_serialize_logic ... bench: 37,543 ns/iter (+/- 732)
test blockdata::block::benches::bench_stream_reader ... bench: 1,872,455 ns/iter (+/- 149,519)
test blockdata::transaction::benches::bench_transaction_deserialize ... bench: 136 ns/iter (+/- 3)
test blockdata::transaction::benches::bench_transaction_serialize ... bench: 51 ns/iter (+/- 8)
test blockdata::transaction::benches::bench_transaction_serialize_logic ... bench: 5 ns/iter (+/- 0)
test blockdata::transaction::benches::bench_transaction_size ... bench: 3 ns/iter (+/- 0)
```
new:
```
test blockdata::block::benches::bench_block_deserialize ... bench: 1,028,574 ns/iter (+/- 10,910)
test blockdata::block::benches::bench_block_serialize ... bench: 162,143 ns/iter (+/- 3,363)
test blockdata::block::benches::bench_block_serialize_logic ... bench: 30,725 ns/iter (+/- 695)
test blockdata::block::benches::bench_stream_reader ... bench: 1,437,071 ns/iter (+/- 53,694)
test blockdata::transaction::benches::bench_transaction_deserialize ... bench: 92 ns/iter (+/- 2)
test blockdata::transaction::benches::bench_transaction_serialize ... bench: 17 ns/iter (+/- 0)
test blockdata::transaction::benches::bench_transaction_serialize_logic ... bench: 5 ns/iter (+/- 0)
test blockdata::transaction::benches::bench_transaction_size ... bench: 4 ns/iter (+/- 0)
```
(*) - I'm benchmarking on a noisy laptop. Take this with a grain of salt. But I think
at least it doesn't make anything slower.
While doing all this manual labor that will probably generate conflicts,
I took a liberty of changing generic type names and variable names to
`r` and `R` (reader) and `w` and `W` for writer.
ACKs for top commit:
RCasatta:
ACK 1fea098dfb tested in downstream lib, space saving in compiled code confirmed
apoelstra:
ACK 1fea098dfb
Tree-SHA512: bc11994791dc97cc468dc9d411b9abf52ad475f23adf5c43d563f323bae0da180c8f57f2f17c1bb7b9bdcf523584b0943763742b81362880206779872ad7489f
When `rust-bitcoin` was started in 2014 the SPDX license list and short
identifiers where not a thing. Now that we have short identifiers and
they are gaining popularity in other projects we can consider using
them.
- Add links to the SPDX website in the readme
- Shorten the author section to a single line
- Remove all the licence information in each file and replace it with an
SPDX ID (see https://spdx.dev/ids/#how)
Of note:
- If the author of a file is explicitly listed, maintain this
information
- If the 'author' is listed as the generic 'Rust Bitcoin developers'
just remove the attribution, this is implicit. This does loose the date
info but that can be seen at any time from the git index using
`git log --follow --format=%ad --date default <FILE> | tail -1`
Fix#1020 (see more relevant discussion there)
This definitely makes the amount of generics compiler
has to generate by avoding generating the same functions
for `R`, &mut R`, `&mut &mut R` and so on.
old:
```
> ls -al target/release/deps/bitcoin-07a9dabf1f3e0266
-rwxrwxr-x 1 dpc dpc 9947832 Jun 2 22:42 target/release/deps/bitcoin-07a9dabf1f3e0266
> strip target/release/deps/bitcoin-07a9dabf1f3e0266
> ls -al target/release/deps/bitcoin-07a9dabf1f3e0266
-rwxrwxr-x 1 dpc dpc 4463024 Jun 2 22:46 target/release/deps/bitcoin-07a9dabf1f3e0266
```
new:
```
> ls -al target/release/deps/bitcoin-07a9dabf1f3e0266
-rwxrwxr-x 1 dpc dpc 9866800 Jun 2 22:44 target/release/deps/bitcoin-07a9dabf1f3e0266
> strip target/release/deps/bitcoin-07a9dabf1f3e0266
> ls -al target/release/deps/bitcoin-07a9dabf1f3e0266
-rwxrwxr-x 1 dpc dpc 4393392 Jun 2 22:45 target/release/deps/bitcoin-07a9dabf1f3e0266
```
In the unit-test binary itself, it saves ~100KB of data.
I did not expect much performance gains, but turn out I was wrong(*):
old:
```
test blockdata::block::benches::bench_block_deserialize ... bench: 1,072,710 ns/iter (+/- 21,871)
test blockdata::block::benches::bench_block_serialize ... bench: 191,223 ns/iter (+/- 5,833)
test blockdata::block::benches::bench_block_serialize_logic ... bench: 37,543 ns/iter (+/- 732)
test blockdata::block::benches::bench_stream_reader ... bench: 1,872,455 ns/iter (+/- 149,519)
test blockdata::transaction::benches::bench_transaction_deserialize ... bench: 136 ns/iter (+/- 3)
test blockdata::transaction::benches::bench_transaction_serialize ... bench: 51 ns/iter (+/- 8)
test blockdata::transaction::benches::bench_transaction_serialize_logic ... bench: 5 ns/iter (+/- 0)
test blockdata::transaction::benches::bench_transaction_size ... bench: 3 ns/iter (+/- 0)
```
new:
```
test blockdata::block::benches::bench_block_deserialize ... bench: 1,028,574 ns/iter (+/- 10,910)
test blockdata::block::benches::bench_block_serialize ... bench: 162,143 ns/iter (+/- 3,363)
test blockdata::block::benches::bench_block_serialize_logic ... bench: 30,725 ns/iter (+/- 695)
test blockdata::block::benches::bench_stream_reader ... bench: 1,437,071 ns/iter (+/- 53,694)
test blockdata::transaction::benches::bench_transaction_deserialize ... bench: 92 ns/iter (+/- 2)
test blockdata::transaction::benches::bench_transaction_serialize ... bench: 17 ns/iter (+/- 0)
test blockdata::transaction::benches::bench_transaction_serialize_logic ... bench: 5 ns/iter (+/- 0)
test blockdata::transaction::benches::bench_transaction_size ... bench: 4 ns/iter (+/- 0)
```
(*) - I'm benchmarking on a noisy laptop. Take this with a grain of salt. But I think
at least it doesn't make anything slower.
While doing all this manual labor that will probably generate conflicts,
I took a liberty of changing generic type names and variable names to
`r` and `R` (reader) and `w` and `W` for writer.
57dd6739c3 Do not print error when displaying for std builds (Tobin C. Harding)
b80cfeed85 Bind to error_kind instead of e (Tobin C. Harding)
241ec72497 Bind to b instead of e (Tobin C. Harding)
01f481bf5c Bind to s instead of e (Tobin C. Harding)
5c6d369289 network: Remove unused error variants (Tobin C. Harding)
e67e97bb37 Put From impl below std::error::Error impl (Tobin C. Harding)
6ca98e5275 Remove error TODO (Tobin C. Harding)
Pull request description:
As part of the ongoing error improvement work and as a direct result of [this comment](https://github.com/rust-bitcoin/rust-bitcoin/pull/987#issuecomment-1135563287) improve the `Display` implementations of all our error types so as to not repeat the source error when printing.
The first 5 patches are trivial clean ups around the errors. Patch 6 is the real work.
EDIT: ~CC @Kixunil, have I got the right idea here bro?~ Patch 6 now includes a macro as suggested.
ACKs for top commit:
Kixunil:
ACK 57dd6739c3
apoelstra:
ACK 57dd6739c3
sanket1729:
ACK 57dd6739c3. Did not check if we covered all cases. We need to remember to use `write_err!` instead of `write!` in future.
Tree-SHA512: 1ed26b0cc5f9a0f71684c431cbb9f94404c116c9136be696434c56a2f56fd93cb5406b0955edbd0dc6f8612e77345c93fa70a70650118968cc58e680333a41de
1875c912c3 Extend docstring for more types (Dawid Ciężarkiewicz)
325ea8fb7d Add "Relevant BIPs` to `Address` (Dawid Ciężarkiewicz)
7c2ca3d20b Add `BlockHeader` Bitcoin Core reference link (Dawid Ciężarkiewicz)
f4922f6fe7 Update `BlockHeader::version` documentation (Dawid Ciężarkiewicz)
Pull request description:
This is meant to make it more educational, and handy even for experienced developers.
A first step to make https://docs.rs/bitcoin (or `cargo doc --open`) a go-to place for
convenient Bitcoin documentation.
ACKs for top commit:
tcharding:
tACK 1875c912c3
apoelstra:
ACK 1875c912c3
sanket1729:
utACK 1875c912c3. Thanks for doing this.
Tree-SHA512: 8457e120f9979bfd95e55e8b18faf6131610aa2241f8e5fc4630fe61dc7e16ddfc35fb6eff46339804016db7b176465943cc0c02d84dcf478ed55da9f5e06fc5
2e7effc604 Feature `use-serde` renamed to `serde` (Martin Habovstiak)
Pull request description:
Features activating external crates are supposed to have same name as
those crates. However we depend on same feature in other crates so we
need a separate feature. After MSRV bump it is possible to rename the
crates and features so we can now fix this inconsistency.
Sadly, derive can't see that the crate was renamed so all derives must
be told to use the other one.
Replaces #373
ACKs for top commit:
apoelstra:
ACK 2e7effc604
Tree-SHA512: b20364b9e8f30c2269bef915e821b2b2ec929e71dd0e88af2bc3a021821f87011d35e095cb8efe99add77a23dde940a17537eb387fb4582b05c57c8679969eb0
99f565f932 Add non_exhaustive to all error enums (Tobin C. Harding)
Pull request description:
Adding an error variant to a public enum is an API breaking change, this means making, what could be, small refactorings or improvements harder. If we use `non_exhaustive` for error types then we mitigate this cost.
There is a tradeoff however, downstream users who explicitly match on our public error types must include a wildcard pattern.
ACKs for top commit:
apoelstra:
ACK 99f565f932
Kixunil:
ACK 99f565f932
Tree-SHA512: ff329f87d52b3fbe24654f32e4062ddae73173cba5a13d511591158e68ee278e9bdc0a70a3e0b42d6606b369255923f9c46d8b3d1b2ff75f8461a82567df80cd
a6efe982bd Use write_all to write whole buffer (Tobin C. Harding)
51c60b8507 Allow no is_empty method for VarInt (Tobin C. Harding)
841f1f5832 Implement Default for TaprootBuilder (Tobin C. Harding)
f81d4aa9bd Remove unnecessary call to clone (Tobin C. Harding)
27649ba182 Use copied instead of map to copy (Tobin C. Harding)
62ccc9102c Use iter().flatten().any() instead of if let Some (Tobin C. Harding)
4b28a1bb97 Remove unneeded return statement (Tobin C. Harding)
16cac3cd70 Derive Default for Witness (Tobin C. Harding)
c75189841a Remove unnecessary closure (Tobin C. Harding)
dfff85352a Ignore bytes written for sighash_single bug output (Tobin C. Harding)
14c72e755b Use contains combinator instead of manual range (Tobin C. Harding)
b7d6c3e02c Remove additional reference (Tobin C. Harding)
1940b00132 Implement From instead of Into (Tobin C. Harding)
fcd0f4deac Use struct field init shorthand (Tobin C. Harding)
641960f037 Use rustfmt::skip (Tobin C. Harding)
3cd00e5d47 Remove unnecessary whitespace (Tobin C. Harding)
Pull request description:
Clear all current Clippy warnings, codebase wide. Possibly contentious patches include:
- [commit](fcd0f4deac): `fcd0f4d Use struct field init shorthand`
- [commit](14c72e755b): `14c72e7 Use contains combinator instead of manual range`
- [commit](3b3c37803a): `3b3c378 Use iter().flatten() instead of if let Some`
## Notes
Please note commit `dfff8535 Ignore bytes written for sighash_single bug output` touches the same lines of code as commit `a6efe982 Use write_all to write whole buffer`.
ACKs for top commit:
apoelstra:
ACK a6efe982bd
Kixunil:
ACK a6efe982bd
Tree-SHA512: 5351a82fd3deadb8e53911c43b5a60a9517d5c57014f5fa833b79b32c0a4606ada0bcd28e06ce35d47aa74115c7cf70c27a1ba9c561a3424ac85a4f69774014d
Adding an error variant to a public enum is an API breaking change, this
means making what could be small refactorings or improvements harder. If
we use `non_exhaustive` for error types then we mitigate this cost.
There is a tradeoff however, downstream users who explicitly match on
our public error types must include a wildcard pattern.
As things are right now, memory exhaustion protection in `Decodable`
is based on checking input-decoded lengths against arbitrary limits,
and ad-hoc wrapping collection deserialization in `Take`.
The problem with that are two-fold:
* Potential consensus bugs due to incorrect limits.
* Performance degradation when decoding nested structured,
due to recursive `Take<Take<..>>` readers.
This change introduces a systematic approach to the problem.
A concept of a "size-limited-reader" is introduced to rely on
the input data to finish at enforced limit and fail deserialization.
Memory exhaustion protection is now achived by capping allocations
to reasonable values, yet allowing the underlying collections
to grow to accomodate rare yet legitmately oversized data (with tiny
performance cost), and reliance on input data size limit.
A set of simple rules allow avoiding recursive `Take` wrappers.
Fix#997
A better way to write a byte string is to use write all so that
`ErrorKind::Interupted` is not returned.
Use `write_all` to write the non-sense (error indication) string to the
writer when we hit the SIGHASH_SINGLE bug.
We implement `source` for all our error types. This means that we should
not display the source error explicitly because users can call `source`
to get the source error.
However, `std::Error::source()` is only available for "std" builds, so
that we do not loose the error source information in "no-std" builds add
a macro that conditionally adds the source onto the error message.
Tobin C. Harding
sanket1729
Andrew Poelstra
Martin Habovstiak
Noah Lanson
Dawid Ciężarkiewicz