While the hash value of the Error variant is meaningless, the variant
still conforms to all other Inventory messages and requires a 32
byte hash to be sent over the wire. This is how bitcoin core operates.
This patch adds the 32 byte array to the Error variant in order to make
its Encoding and Decoding paths symmetrical. This also allows a reader
to discard the 32 bytes when decoding a message. The hash is still not
exposed to the caller.
This was never a problem before because the top level RawNetworkPackage
pulls all the required bytes off a reader before decoding. But this is
not as easy to do with the v2 p2p network messages.
Recently we removed the `all_zeros` function from `OutPoint` in favour
of a more meaningfully named associated const. We can do the same for
`BlockHash`, the all zeros has is used for the previous blockhash of the
genesis block, add a const named as such.
In test code where we use the `all_zeros` function, just use the more
explicit form `from_byte_array([0; 32])`.
Manually implement it for Wtxid, Txid and BlockHash, where the all-zero
"hash" has a consensus meaning. But in general we should not be
implementing this method unless we have a good reason to do so. It can
be emulated or implemeted in terms of from_byte_array.
The use of Wtxid::all_zeros is obscure and specific enough that I am
tempted to drop it. But for txid and blockhash, the 0 hash appears in
actual blockdata and we should keep it.
All other uses of all_zeros were either in test code or in places where
the specific hash was not important and [u8; 32] was a more appropriate
type.
the `blockdata` directory is code organisation thing, all the
types/modules are re-exported from other places. In preparation for, and
to make easier, the `primitives` crate smashing work - remove all
explicit usage of `blockdata`.
Note that the few instances remain as they seem required e.g.,
`pub(in crate::blockdata::script)`
Refactor only, no logic changes.
Currently we have a trait `Hash` that is required for `Hmac`, `Hkdf`,
and other use cases. However, it is unegonomic for users who just want
to do a simple hash to have to import the trait.
Add inherent functions to all hash types including those created with
the new wrapper type macros.
This patch introduces some duplicate code but we are trying to make
progress in the hashes API re-write. We can come back and de-dublicate
later.
Includes making `to_byte_array`,`from_byte_array`, `as_byte_array`, and
`all_zeros` const where easily possible.
Clean up the test imports in the `p2p` module:
- Use `use super::*` as is conventional.
- Use `sha256d::Hash` as is conventional.
Refactor, no logic changes.
802af8e417 Removed //! spare line at end of headers (jamil.lambert)
Pull request description:
Some of the headers had a //! at the end but most didn't. They have all been removed in bitcoin/src/ to make the files consistent
ACKs for top commit:
apoelstra:
ACK 802af8e417
Tree-SHA512: a1eb0dda76af68cb96352f6b31231fa5391d49e11df924065e76871f82231ec0d5751190663f142240e5d757975937387243d1fdac3684d9bdbd7e2362dbd0a7
Currently we use the `Hash` trait in a bunch of places to call
`all_zeros`. We are attempting to improve the `hashes` API and this
usage is both unnecessary and also hindering that effort.
Use the concrete type (e.g. `BlockHash`) instead of calling through the
trait method.
Refactor only, no logic changes.
Our decoding code reads bytes in very small chunks. Which is not
efficient when dealing with the OS where the cost of a context switch is
significant. People could already buffer the data but it's easy to
forget it by accident.
This change requires the new `io::BufRead` trait instead of `io::Read`
in all bounds.
Code such as `Transaction::consensus_decode(&mut File::open(foo))` will
break after this is applied, uncovering the inefficiency.
This was originally Kix's work, done before we had the `io` crate.
Changes to `bitcoin` were originally his, any new mistakes are my own.
Changes to `io` are mine.
Co-developed-by: Martin Habovstiak <martin.habovstiak@gmail.com>
There is no advantage in having `io::Read` as opposed to `Read` and
importing the trait. It is surprising that we do so.
Remove `io::` path from `io::Read` and `io::Write`. Some docs keep the
path, leave them as is. Add import `use io::{Read, Write}`.
Refactor only, no logic changes.
We would like all the various hash types to be defined where they
rightly live instead of in the `hash_types` module.
Move transaction hash types to the `transaction` module.
We would like all the various hash types to be defined where they
rightly live instead of in the `hash_types` module.
Move the block hash types to the `block` module. While moving, add full
stops to the rustdoc of each hash.
Re-export _all four_ types from lib.rs (previously `WitnessMerkleNode`
was not re-exported).
The `PROTOCOL_VERSION` const is a p2p layer constant. It can live in the
`mod.rs` file of the `p2p` module.
This is a straight code move, the `PROTOCOL_VERSION` replaces the
current re-export.
The `network` module deals with data types and logic related to
internetworking bitcoind nodes, this is commonly referred to as the p2p
layer.
Rename the `network` module to `p2p` and fix all the paths.
2023-08-01 16:36:12 +10:00
Renamed from bitcoin/src/network/message_blockdata.rs (Browse further)
Nick Johnson
yancy
Tobin C. Harding
Jamil Lambert, PhD
Andrew Poelstra