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use std::{fmt, io};
use consensus::encode::{self, Decodable, Encodable, VarInt, MAX_VEC_SIZE};
use util::psbt::Error;
#[derive(Debug, PartialEq, Hash, Eq, Clone, Ord, PartialOrd)]
pub struct Key {
pub type_value: u8,
pub key: Vec<u8>,
}
#[derive(Debug, PartialEq)]
pub struct Pair {
pub key: Key,
pub value: Vec<u8>,
}
impl fmt::Display for Key {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(
f,
"type: {:#x}, key: {}",
self.type_value,
::hex::encode(&self.key)
)
}
}
impl Decodable for Key {
fn consensus_decode<D: io::Read>(mut d: D) -> Result<Self, encode::Error> {
let VarInt(byte_size): VarInt = Decodable::consensus_decode(&mut d)?;
if byte_size == 0 {
return Err(Error::NoMorePairs.into());
}
let key_byte_size: u64 = byte_size - 1;
if key_byte_size > MAX_VEC_SIZE as u64 {
return Err(encode::Error::OversizedVectorAllocation {
requested: key_byte_size as usize,
max: MAX_VEC_SIZE,
})
}
let type_value: u8 = Decodable::consensus_decode(&mut d)?;
let mut key = Vec::with_capacity(key_byte_size as usize);
for _ in 0..key_byte_size {
key.push(Decodable::consensus_decode(&mut d)?);
}
Ok(Key {
type_value: type_value,
key: key,
})
}
}
impl Encodable for Key {
fn consensus_encode<S: io::Write>(
&self,
mut s: S,
) -> Result<usize, encode::Error> {
let mut len = 0;
len += VarInt((self.key.len() + 1) as u64).consensus_encode(&mut s)?;
len += self.type_value.consensus_encode(&mut s)?;
for key in &self.key {
len += key.consensus_encode(&mut s)?
}
Ok(len)
}
}
impl Encodable for Pair {
fn consensus_encode<S: io::Write>(
&self,
mut s: S,
) -> Result<usize, encode::Error> {
let len = self.key.consensus_encode(&mut s)?;
Ok(len + self.value.consensus_encode(s)?)
}
}
impl Decodable for Pair {
fn consensus_decode<D: io::Read>(mut d: D) -> Result<Self, encode::Error> {
Ok(Pair {
key: Decodable::consensus_decode(&mut d)?,
value: Decodable::consensus_decode(d)?,
})
}
}