tendermint 0.10.1

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 (JSONRPC).
Documentation 
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//! Serde serializers

use serde::{de::Error as _, Deserialize, Deserializer, Serialize, Serializer};
#[cfg(feature = "rpc")]
use std::time::Duration;

/// Parse `i64` from a JSON string
pub(crate) fn parse_i64<'de, D>(deserializer: D) -> Result<i64, D::Error>
where
    D: Deserializer<'de>,
{
    String::deserialize(deserializer)?
        .parse::<i64>()
        .map_err(|e| D::Error::custom(format!("{}", e)))
}

/// Serialize `i64` as a JSON string
#[allow(clippy::trivially_copy_pass_by_ref)]
pub(crate) fn serialize_i64<S>(value: &i64, serializer: S) -> Result<S::Ok, S::Error>
where
    S: Serializer,
{
    format!("{}", value).serialize(serializer)
}

/// Parse `u64` from a JSON string
pub(crate) fn parse_u64<'de, D>(deserializer: D) -> Result<u64, D::Error>
where
    D: Deserializer<'de>,
{
    String::deserialize(deserializer)?
        .parse::<u64>()
        .map_err(|e| D::Error::custom(format!("{}", e)))
}

/// Serialize `u64` as a JSON string
#[allow(clippy::trivially_copy_pass_by_ref)]
pub(crate) fn serialize_u64<S>(value: &u64, serializer: S) -> Result<S::Ok, S::Error>
where
    S: Serializer,
{
    format!("{}", value).serialize(serializer)
}

/// Parse `Duration` from a JSON string containing a nanosecond count
#[cfg(feature = "rpc")]
pub(crate) fn parse_duration<'de, D>(deserializer: D) -> Result<Duration, D::Error>
where
    D: Deserializer<'de>,
{
    // TODO(tarcieri): handle 64-bit overflow?
    let nanos = String::deserialize(deserializer)?
        .parse::<u64>()
        .map_err(|e| D::Error::custom(format!("{}", e)))?;

    Ok(Duration::from_nanos(nanos))
}

/// Serialize `Duration` as a JSON string containing a nanosecond count
#[cfg(feature = "rpc")]
pub(crate) fn serialize_duration<S>(duration: &Duration, serializer: S) -> Result<S::Ok, S::Error>
where
    S: Serializer,
{
    format!("{}", duration.as_nanos()).serialize(serializer)
}