// licenses.
//! A very simple serialization framework which is used to serialize/deserialize messages as well
-//! as ChannelsManagers and ChannelMonitors.
+//! as [`ChannelManager`]s and [`ChannelMonitor`]s.
+//!
+//! [`ChannelManager`]: crate::ln::channelmanager::ChannelManager
+//! [`ChannelMonitor`]: crate::chain::channelmonitor::ChannelMonitor
use crate::prelude::*;
use crate::io::{self, Read, Seek, Write};
/// serialization buffer size
pub const MAX_BUF_SIZE: usize = 64 * 1024;
-/// A simplified version of std::io::Write that exists largely for backwards compatibility.
-/// An impl is provided for any type that also impls std::io::Write.
+/// A simplified version of [`std::io::Write`] that exists largely for backwards compatibility.
+/// An impl is provided for any type that also impls [`std::io::Write`].
///
/// (C-not exported) as we only export serialization to/from byte arrays instead
pub trait Writer {
/// Writer that only tracks the amount of data written - useful if you need to calculate the length
/// of some data when serialized but don't yet need the full data.
-pub(crate) struct LengthCalculatingWriter(pub usize);
+pub struct LengthCalculatingWriter(pub usize);
impl Writer for LengthCalculatingWriter {
#[inline]
fn write_all(&mut self, buf: &[u8]) -> Result<(), io::Error> {
}
}
-/// Essentially std::io::Take but a bit simpler and with a method to walk the underlying stream
+/// Essentially [`std::io::Take`] but a bit simpler and with a method to walk the underlying stream
/// forward to ensure we always consume exactly the fixed length specified.
-pub(crate) struct FixedLengthReader<R: Read> {
+pub struct FixedLengthReader<R: Read> {
read: R,
bytes_read: u64,
total_bytes: u64,
}
impl<R: Read> FixedLengthReader<R> {
+ /// Returns a new [`FixedLengthReader`].
pub fn new(read: R, total_bytes: u64) -> Self {
Self { read, bytes_read: 0, total_bytes }
}
+ /// Returns whether some bytes are remaining or not.
#[inline]
pub fn bytes_remain(&mut self) -> bool {
self.bytes_read != self.total_bytes
}
+ /// Consumes the remaining bytes.
#[inline]
pub fn eat_remaining(&mut self) -> Result<(), DecodeError> {
copy(self, &mut sink()).unwrap();
}
}
-/// A Read which tracks whether any bytes have been read at all. This allows us to distinguish
+/// A [`Read`] implementation which tracks whether any bytes have been read at all. This allows us to distinguish
/// between "EOF reached before we started" and "EOF reached mid-read".
-pub(crate) struct ReadTrackingReader<R: Read> {
+pub struct ReadTrackingReader<R: Read> {
read: R,
+ /// Returns whether we have read from this reader or not yet.
pub have_read: bool,
}
impl<R: Read> ReadTrackingReader<R> {
+ /// Returns a new [`ReadTrackingReader`].
pub fn new(read: R) -> Self {
Self { read, have_read: false }
}
}
}
-/// A trait that various rust-lightning types implement allowing them to be written out to a Writer
+/// A trait that various LDK types implement allowing them to be written out to a [`Writer`].
///
/// (C-not exported) as we only export serialization to/from byte arrays instead
pub trait Writeable {
- /// Writes self out to the given Writer
+ /// Writes `self` out to the given [`Writer`].
fn write<W: Writer>(&self, writer: &mut W) -> Result<(), io::Error>;
- /// Writes self out to a Vec<u8>
+ /// Writes `self` out to a `Vec<u8>`.
fn encode(&self) -> Vec<u8> {
let mut msg = VecWriter(Vec::new());
self.write(&mut msg).unwrap();
msg.0
}
- /// Writes self out to a Vec<u8>
+ /// Writes `self` out to a `Vec<u8>`.
#[cfg(test)]
fn encode_with_len(&self) -> Vec<u8> {
let mut msg = VecWriter(Vec::new());
fn write<W: Writer>(&self, writer: &mut W) -> Result<(), io::Error> { (*self).write(writer) }
}
-/// A trait that various rust-lightning types implement allowing them to be read in from a Read
+/// A trait that various LDK types implement allowing them to be read in from a [`Read`].
///
/// (C-not exported) as we only export serialization to/from byte arrays instead
pub trait Readable
where Self: Sized
{
- /// Reads a Self in from the given Read
+ /// Reads a `Self` in from the given [`Read`].
fn read<R: Read>(reader: &mut R) -> Result<Self, DecodeError>;
}
-/// A trait that various rust-lightning types implement allowing them to be read in from a
-/// `Read + Seek`.
+/// A trait that various LDK types implement allowing them to be read in from a
+/// [`Read`]` + `[`Seek`].
pub(crate) trait SeekReadable where Self: Sized {
- /// Reads a Self in from the given Read
+ /// Reads a `Self` in from the given [`Read`].
fn read<R: Read + Seek>(reader: &mut R) -> Result<Self, DecodeError>;
}
-/// A trait that various higher-level rust-lightning types implement allowing them to be read in
-/// from a Read given some additional set of arguments which is required to deserialize.
+/// A trait that various higher-level LDK types implement allowing them to be read in
+/// from a [`Read`] given some additional set of arguments which is required to deserialize.
///
/// (C-not exported) as we only export serialization to/from byte arrays instead
pub trait ReadableArgs<P>
where Self: Sized
{
- /// Reads a Self in from the given Read
+ /// Reads a `Self` in from the given [`Read`].
fn read<R: Read>(reader: &mut R, params: P) -> Result<Self, DecodeError>;
}
-/// A std::io::Read that also provides the total bytes available to read.
+/// A [`std::io::Read`] that also provides the total bytes available to be read.
pub(crate) trait LengthRead: Read {
- /// The total number of bytes available to read.
+ /// The total number of bytes available to be read.
fn total_bytes(&self) -> u64;
}
-/// A trait that various higher-level rust-lightning types implement allowing them to be read in
+/// A trait that various higher-level LDK types implement allowing them to be read in
/// from a Read given some additional set of arguments which is required to deserialize, requiring
/// the implementer to provide the total length of the read.
pub(crate) trait LengthReadableArgs<P> where Self: Sized
{
- /// Reads a Self in from the given LengthRead
+ /// Reads a `Self` in from the given [`LengthRead`].
fn read<R: LengthRead>(reader: &mut R, params: P) -> Result<Self, DecodeError>;
}
-/// A trait that various higher-level rust-lightning types implement allowing them to be read in
-/// from a Read, requiring the implementer to provide the total length of the read.
+/// A trait that various higher-level LDK types implement allowing them to be read in
+/// from a [`Read`], requiring the implementer to provide the total length of the read.
pub(crate) trait LengthReadable where Self: Sized
{
- /// Reads a Self in from the given LengthRead
+ /// Reads a `Self` in from the given [`LengthRead`].
fn read<R: LengthRead>(reader: &mut R) -> Result<Self, DecodeError>;
}
-/// A trait that various rust-lightning types implement allowing them to (maybe) be read in from a Read
+/// A trait that various LDK types implement allowing them to (maybe) be read in from a [`Read`].
///
/// (C-not exported) as we only export serialization to/from byte arrays instead
pub trait MaybeReadable
where Self: Sized
{
- /// Reads a Self in from the given Read
+ /// Reads a `Self` in from the given [`Read`].
fn read<R: Read>(reader: &mut R) -> Result<Option<Self>, DecodeError>;
}
}
}
-pub(crate) struct OptionDeserWrapper<T: Readable>(pub Option<T>);
+/// Wrapper to read a required (non-optional) TLV record.
+pub struct OptionDeserWrapper<T: Readable>(pub Option<T>);
impl<T: Readable> Readable for OptionDeserWrapper<T> {
#[inline]
fn read<R: Read>(reader: &mut R) -> Result<Self, DecodeError> {
Ok(Self(Some(Readable::read(reader)?)))
}
}
-/// When handling default_values, we want to map the default-value T directly
-/// to a OptionDeserWrapper<T> in a way that works for `field: T = t;` as
+/// When handling `default_values`, we want to map the default-value T directly
+/// to a `OptionDeserWrapper<T>` in a way that works for `field: T = t;` as
/// well. Thus, we assume `Into<T> for T` does nothing and use that.
impl<T: Readable> From<T> for OptionDeserWrapper<T> {
fn from(t: T) -> OptionDeserWrapper<T> { OptionDeserWrapper(Some(t)) }
}
}
-/// Lightning TLV uses a custom variable-length integer called BigSize. It is similar to Bitcoin's
+/// Lightning TLV uses a custom variable-length integer called `BigSize`. It is similar to Bitcoin's
/// variable-length integers except that it is serialized in big-endian instead of little-endian.
///
/// Like Bitcoin's variable-length integer, it exhibits ambiguity in that certain values can be
/// In TLV we occasionally send fields which only consist of, or potentially end with, a
/// variable-length integer which is simply truncated by skipping high zero bytes. This type
-/// encapsulates such integers implementing Readable/Writeable for them.
+/// encapsulates such integers implementing [`Readable`]/[`Writeable`] for them.
#[cfg_attr(test, derive(PartialEq, Eq, Debug))]
pub(crate) struct HighZeroBytesDroppedBigSize<T>(pub T);
}
}
-/// For variable-length values within TLV record where the length is encoded as part of the record.
+/// A type for variable-length values within TLV record where the length is encoded as part of the record.
/// Used to prevent encoding the length twice.
-pub(crate) struct WithoutLength<T>(pub T);
+pub struct WithoutLength<T>(pub T);
impl Writeable for WithoutLength<&String> {
#[inline]
/// Only the character set and length will be validated.
/// The character set consists of ASCII alphanumeric characters, hyphens, and periods.
/// Its length is guaranteed to be representable by a single byte.
-/// This serialization is used by BOLT 7 hostnames.
+/// This serialization is used by [`BOLT 7`] hostnames.
+///
+/// [`BOLT 7`]: https://github.com/lightning/bolts/blob/master/07-routing-gossip.md
#[derive(Clone, Debug, PartialEq, Eq)]
pub struct Hostname(String);
impl Hostname {