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use crate::Signature;
use ::serde::{de, ser, Deserialize, Serialize};
use core::fmt;
#[cfg(feature = "serde_bytes")]
use serde_bytes_crate as serde_bytes;
#[cfg_attr(docsrs, doc(cfg(feature = "serde")))]
impl Serialize for Signature {
fn serialize<S: ser::Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error> {
use ser::SerializeTuple;
let mut seq = serializer.serialize_tuple(Signature::BYTE_SIZE)?;
for byte in &self.0[..] {
seq.serialize_element(byte)?;
}
seq.end()
}
}
#[cfg_attr(docsrs, doc(cfg(feature = "serde")))]
impl<'de> Deserialize<'de> for Signature {
fn deserialize<D: de::Deserializer<'de>>(deserializer: D) -> Result<Self, D::Error> {
struct ByteArrayVisitor;
impl<'de> de::Visitor<'de> for ByteArrayVisitor {
type Value = [u8; Signature::BYTE_SIZE];
fn expecting(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
formatter.write_str("bytestring of length 64")
}
fn visit_seq<A>(self, mut seq: A) -> Result<[u8; Signature::BYTE_SIZE], A::Error>
where
A: de::SeqAccess<'de>,
{
use de::Error;
let mut arr = [0u8; Signature::BYTE_SIZE];
for (i, byte) in arr.iter_mut().enumerate() {
*byte = seq
.next_element()?
.ok_or_else(|| Error::invalid_length(i, &self))?;
}
Ok(arr)
}
}
let bytes = deserializer.deserialize_tuple(Signature::BYTE_SIZE, ByteArrayVisitor)?;
Self::from_bytes(&bytes).map_err(de::Error::custom)
}
}
#[cfg(feature = "serde_bytes")]
#[cfg_attr(docsrs, doc(cfg(feature = "serde_bytes")))]
impl serde_bytes::Serialize for Signature {
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where
S: serde::Serializer,
{
serializer.serialize_bytes(&self.0)
}
}
#[cfg(feature = "serde_bytes")]
#[cfg_attr(docsrs, doc(cfg(feature = "serde_bytes")))]
impl<'de> serde_bytes::Deserialize<'de> for Signature {
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
where
D: de::Deserializer<'de>,
{
struct ByteArrayVisitor;
impl<'de> de::Visitor<'de> for ByteArrayVisitor {
type Value = [u8; Signature::BYTE_SIZE];
fn expecting(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
formatter.write_str("bytestring of length 64")
}
fn visit_bytes<E>(self, bytes: &[u8]) -> Result<Self::Value, E>
where
E: de::Error,
{
use de::Error;
bytes
.try_into()
.map_err(|_| Error::invalid_length(bytes.len(), &self))
}
}
let bytes = deserializer.deserialize_bytes(ByteArrayVisitor)?;
Self::from_bytes(&bytes).map_err(de::Error::custom)
}
}
#[cfg(test)]
mod tests {
use crate::Signature;
use hex_literal::hex;
const SIGNATURE_BYTES: [u8; Signature::BYTE_SIZE] = hex!(
"
e5564300c360ac729086e2cc806e828a
84877f1eb8e5d974d873e06522490155
5fb8821590a33bacc61e39701cf9b46b
d25bf5f0595bbe24655141438e7a100b
"
);
#[test]
fn round_trip() {
let signature = Signature::from_bytes(&SIGNATURE_BYTES).unwrap();
let serialized = bincode::serialize(&signature).unwrap();
let deserialized = bincode::deserialize(&serialized).unwrap();
assert_eq!(signature, deserialized);
}
#[test]
fn overflow() {
let bytes = hex!("ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff");
assert!(bincode::deserialize::<Signature>(&bytes).is_err());
}
}
