use prelude::*;
use std::io::{Read, Write};
-use std::collections::HashMap;
use core::hash::Hash;
use std::sync::Mutex;
use core::cmp;
use bitcoin::secp256k1::Signature;
use bitcoin::secp256k1::key::{PublicKey, SecretKey};
-use bitcoin::secp256k1::constants::{PUBLIC_KEY_SIZE, COMPACT_SIGNATURE_SIZE};
+use bitcoin::secp256k1::constants::{PUBLIC_KEY_SIZE, SECRET_KEY_SIZE, COMPACT_SIGNATURE_SIZE};
use bitcoin::blockdata::script::Script;
use bitcoin::blockdata::transaction::{OutPoint, Transaction, TxOut};
use bitcoin::consensus;
pub(crate) struct WriterWriteAdaptor<'a, W: Writer + 'a>(pub &'a mut W);
impl<'a, W: Writer + 'a> Write for WriterWriteAdaptor<'a, W> {
+ #[inline]
fn write_all(&mut self, buf: &[u8]) -> Result<(), ::std::io::Error> {
self.0.write_all(buf)
}
+ #[inline]
fn write(&mut self, buf: &[u8]) -> Result<usize, ::std::io::Error> {
self.0.write_all(buf)?;
Ok(buf.len())
}
+ #[inline]
fn flush(&mut self) -> Result<(), ::std::io::Error> {
Ok(())
}
pub(crate) struct VecWriter(pub Vec<u8>);
impl Writer for VecWriter {
+ #[inline]
fn write_all(&mut self, buf: &[u8]) -> Result<(), ::std::io::Error> {
self.0.extend_from_slice(buf);
Ok(())
}
+ #[inline]
fn size_hint(&mut self, size: usize) {
self.0.reserve_exact(size);
}
Self { read, bytes_read: 0, total_bytes }
}
+ #[inline]
pub fn bytes_remain(&mut self) -> bool {
self.bytes_read != self.total_bytes
}
+ #[inline]
pub fn eat_remaining(&mut self) -> Result<(), DecodeError> {
::std::io::copy(self, &mut ::std::io::sink()).unwrap();
if self.bytes_read != self.total_bytes {
}
}
impl<R: Read> Read for FixedLengthReader<R> {
+ #[inline]
fn read(&mut self, dest: &mut [u8]) -> Result<usize, ::std::io::Error> {
if self.total_bytes == self.bytes_read {
Ok(0)
}
}
impl<R: Read> Read for ReadTrackingReader<R> {
+ #[inline]
fn read(&mut self, dest: &mut [u8]) -> Result<usize, ::std::io::Error> {
match self.read.read(dest) {
Ok(0) => Ok(0),
msg.0[..2].copy_from_slice(&(len as u16 - 2).to_be_bytes());
msg.0
}
+
+ /// Gets the length of this object after it has been serialized. This can be overridden to
+ /// optimize cases where we prepend an object with its length.
+ // Note that LLVM optimizes this away in most cases! Check that it isn't before you override!
+ #[inline]
+ fn serialized_length(&self) -> usize {
+ let mut len_calc = LengthCalculatingWriter(0);
+ self.write(&mut len_calc).expect("No in-memory data may fail to serialize");
+ len_calc.0
+ }
}
impl<'a, T: Writeable> Writeable for &'a T {
pub(crate) 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)?)))
}
}
-const MAX_ALLOC_SIZE: u64 = 64*1024;
-
+/// Wrapper to write each element of a Vec with no length prefix
pub(crate) struct VecWriteWrapper<'a, T: Writeable>(pub &'a Vec<T>);
impl<'a, T: Writeable> Writeable for VecWriteWrapper<'a, T> {
+ #[inline]
fn write<W: Writer>(&self, writer: &mut W) -> Result<(), ::std::io::Error> {
- (self.0.len() as u64).write(writer)?;
for ref v in self.0.iter() {
v.write(writer)?;
}
Ok(())
}
}
+
+/// Wrapper to read elements from a given stream until it reaches the end of the stream.
pub(crate) struct VecReadWrapper<T: Readable>(pub Vec<T>);
impl<T: Readable> Readable for VecReadWrapper<T> {
- fn read<R: Read>(reader: &mut R) -> Result<Self, DecodeError> {
- let count: u64 = Readable::read(reader)?;
- let mut values = Vec::with_capacity(cmp::min(count, MAX_ALLOC_SIZE / (core::mem::size_of::<T>() as u64)) as usize);
- for _ in 0..count {
- match Readable::read(reader) {
+ #[inline]
+ fn read<R: Read>(mut reader: &mut R) -> Result<Self, DecodeError> {
+ let mut values = Vec::new();
+ loop {
+ let mut track_read = ReadTrackingReader::new(&mut reader);
+ match Readable::read(&mut track_read) {
Ok(v) => { values.push(v); },
+ // If we failed to read any bytes at all, we reached the end of our TLV
+ // stream and have simply exhausted all entries.
+ Err(ref e) if e == &DecodeError::ShortRead && !track_read.have_read => break,
Err(e) => return Err(e),
}
}
/// encoded in several different ways, which we must check for at deserialization-time. Thus, if
/// you're looking for an example of a variable-length integer to use for your own project, move
/// along, this is a rather poor design.
-pub(crate) struct BigSize(pub u64);
+pub struct BigSize(pub u64);
impl Writeable for BigSize {
#[inline]
fn write<W: Writer>(&self, writer: &mut W) -> Result<(), ::std::io::Error> {
impl_array!(32); // for channel id & hmac
impl_array!(PUBLIC_KEY_SIZE); // for PublicKey
impl_array!(COMPACT_SIGNATURE_SIZE); // for Signature
+impl_array!(162); // for ECDSA adaptor signatures
impl_array!(1300); // for OnionPacket.hop_data
// HashMap
fn write<W: Writer>(&self, w: &mut W) -> Result<(), ::std::io::Error> {
self.serialize().write(w)
}
+ #[inline]
+ fn serialized_length(&self) -> usize {
+ PUBLIC_KEY_SIZE
+ }
}
impl Readable for PublicKey {
impl Writeable for SecretKey {
fn write<W: Writer>(&self, w: &mut W) -> Result<(), ::std::io::Error> {
- let mut ser = [0; 32];
+ let mut ser = [0; SECRET_KEY_SIZE];
ser.copy_from_slice(&self[..]);
ser.write(w)
}
+ #[inline]
+ fn serialized_length(&self) -> usize {
+ SECRET_KEY_SIZE
+ }
}
impl Readable for SecretKey {
fn read<R: Read>(r: &mut R) -> Result<Self, DecodeError> {
- let buf: [u8; 32] = Readable::read(r)?;
+ let buf: [u8; SECRET_KEY_SIZE] = Readable::read(r)?;
match SecretKey::from_slice(&buf) {
Ok(key) => Ok(key),
Err(_) => return Err(DecodeError::InvalidValue),
fn write<W: Writer>(&self, w: &mut W) -> Result<(), ::std::io::Error> {
self.serialize_compact().write(w)
}
+ #[inline]
+ fn serialized_length(&self) -> usize {
+ COMPACT_SIGNATURE_SIZE
+ }
}
impl Readable for Signature {
}
}
+impl<T: Writeable> Writeable for Box<T> {
+ fn write<W: Writer>(&self, w: &mut W) -> Result<(), ::std::io::Error> {
+ T::write(&**self, w)
+ }
+}
+
+impl<T: Readable> Readable for Box<T> {
+ fn read<R: Read>(r: &mut R) -> Result<Self, DecodeError> {
+ Ok(Box::new(Readable::read(r)?))
+ }
+}
+
impl<T: Writeable> Writeable for Option<T> {
fn write<W: Writer>(&self, w: &mut W) -> Result<(), ::std::io::Error> {
match *self {
None => 0u8.write(w)?,
Some(ref data) => {
- let mut len_calc = LengthCalculatingWriter(0);
- data.write(&mut len_calc).expect("No in-memory data may fail to serialize");
- BigSize(len_calc.0 as u64 + 1).write(w)?;
+ BigSize(data.serialized_length() as u64 + 1).write(w)?;
data.write(w)?;
}
}
self.1.write(w)
}
}
+
+impl<A: Readable, B: Readable, C: Readable> Readable for (A, B, C) {
+ fn read<R: Read>(r: &mut R) -> Result<Self, DecodeError> {
+ let a: A = Readable::read(r)?;
+ let b: B = Readable::read(r)?;
+ let c: C = Readable::read(r)?;
+ Ok((a, b, c))
+ }
+}
+impl<A: Writeable, B: Writeable, C: Writeable> Writeable for (A, B, C) {
+ fn write<W: Writer>(&self, w: &mut W) -> Result<(), ::std::io::Error> {
+ self.0.write(w)?;
+ self.1.write(w)?;
+ self.2.write(w)
+ }
+}