use bitcoin_hashes::hex::{FromHex, ToHex};
use bls12_381::Scalar;
use serde::de::Error;
use serde::{Deserialize, Deserializer, Serializer};
pub fn serialize<S: Serializer>(x: &Scalar, s: S) -> Result<S::Ok, S::Error> {
let bytes = x.to_bytes();
if s.is_human_readable() {
s.serialize_str(&bytes.to_hex())
} else {
s.serialize_bytes(&bytes)
}
}
pub fn deserialize<'d, D: Deserializer<'d>>(d: D) -> Result<Scalar, D::Error> {
let bytes: Vec<u8> = if d.is_human_readable() {
let deser: String = Deserialize::deserialize(d)?;
Vec::<u8>::from_hex(&deser).map_err(serde::de::Error::custom)?
} else {
Deserialize::deserialize(d)?
};
if bytes.len() != 32 {
return Err(D::Error::invalid_length(bytes.len(), &"32 bytes"));
}
let mut byte_array = [0u8; 32];
byte_array.copy_from_slice(&bytes);
let scalar = Scalar::from_bytes(&byte_array);
if scalar.is_some().into() {
Ok(scalar.unwrap())
} else {
Err(D::Error::custom("Could not decode compressed G1Affine"))
}
}