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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//! AppHash serialization with validation

use core::str::FromStr;

use alloc::borrow::Cow;

use serde::{de, Deserialize, Deserializer, Serializer};

use crate::{prelude::*, AppHash};

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

/// Serialize from AppHash into hexstring
pub fn serialize<S>(value: &AppHash, serializer: S) -> Result<S::Ok, S::Error>
where
    S: Serializer,
{
    // Serialize as Option<String> for symmetry with deserialize
    serializer.serialize_some(&value.to_string())
}