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use serde::{de, Deserialize, Deserializer, Serialize, Serializer};
use serde_bytes::ByteBuf;
#[derive(Serialize)]
#[serde(transparent)]
pub struct BytesSer<'a>(#[serde(with = "serde_bytes")] pub &'a [u8]);
#[derive(Deserialize, Serialize, Debug, PartialEq, Clone)]
#[serde(transparent)]
pub struct BytesDe(#[serde(with = "serde_bytes")] pub Vec<u8>);
pub struct Byte32De(pub [u8; 32]);
impl Serialize for Byte32De {
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where
S: Serializer,
{
<[u8] as serde_bytes::Serialize>::serialize(&self.0, serializer)
}
}
impl<'de> Deserialize<'de> for Byte32De {
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
where
D: Deserializer<'de>,
{
let bz_buf: ByteBuf = Deserialize::deserialize(deserializer)?;
if bz_buf.len() != 32 {
return Err(de::Error::custom("Array of bytes not length 32"));
}
let mut array = [0; 32];
array.copy_from_slice(bz_buf.as_ref());
Ok(Byte32De(array))
}
}
pub fn bytes_32(buf: &[u8]) -> [u8; 32] {
let mut array = [0; 32];
array.copy_from_slice(buf.as_ref());
array
}
#[cfg(test)]
mod tests {
use super::*;
use crate::{from_slice, to_vec};
#[test]
fn array_symmetric_serialization() {
let vec: Vec<u8> = (0..32).collect::<Vec<u8>>();
let slice_bz = to_vec(&BytesSer(&vec)).unwrap();
let Byte32De(arr) = from_slice(&slice_bz).unwrap();
assert_eq!(arr.as_ref(), vec.as_slice());
assert_eq!(to_vec(&BytesSer(&arr)).unwrap(), slice_bz);
}
}