tendermint 0.40.4

Tendermint is a high-performance blockchain consensus engine that powers Byzantine fault tolerant applications written in any programming language. This crate provides core types for representing information about Tendermint blockchain networks, including chain information types, secret connections, and remote procedure calls (JSON-RPC).
Documentation 
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//! Hash serialization with validation

use alloc::borrow::Cow;

use serde::{de, ser, Deserialize, Deserializer, Serializer};
use subtle_encoding::hex;

use crate::{hash::Algorithm, prelude::*, Hash};

/// Deserialize hexstring into Hash
pub fn deserialize<'de, D>(deserializer: D) -> Result<Hash, D::Error>
where
    D: Deserializer<'de>,
{
    let hexstring = Option::<Cow<'_, str>>::deserialize(deserializer)?.unwrap_or(Cow::Borrowed(""));
    Hash::from_hex_upper(Algorithm::Sha256, &hexstring).map_err(de::Error::custom)
}

/// Serialize from Hash into hexstring
pub fn serialize<S>(value: &Hash, serializer: S) -> Result<S::Ok, S::Error>
where
    S: Serializer,
{
    let hex_bytes = hex::encode_upper(value.as_bytes());
    let hex_string = String::from_utf8(hex_bytes).map_err(ser::Error::custom)?;
    // Serialize as Option<String> for symmetry with deserialize
    serializer.serialize_some(&hex_string)
}