tendermint 0.28.0

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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//! Block metadata

use core::convert::{TryFrom, TryInto};

use serde::{Deserialize, Serialize};
use tendermint_proto::types::BlockMeta as RawMeta;

use super::{Header, Id};
use crate::{error::Error, prelude::*};

/// Block metadata - Todo: implement constructor and getters
#[derive(Serialize, Deserialize, Clone, Debug)]
#[serde(try_from = "RawMeta", into = "RawMeta")]
pub struct Meta {
    /// ID of the block
    pub block_id: Id,

    /// block size - Todo: make this robust (u63)
    pub block_size: i64,

    /// Header of the block
    pub header: Header,

    /// Number of transactions - Todo: make this robust (u63)
    pub num_txs: i64,
}

impl TryFrom<RawMeta> for Meta {
    type Error = Error;

    fn try_from(value: RawMeta) -> Result<Self, Self::Error> {
        Ok(Meta {
            block_id: value
                .block_id
                .ok_or_else(|| Error::invalid_block("no block_id".to_string()))?
                .try_into()?,
            block_size: value.block_size,
            header: value
                .header
                .ok_or_else(|| Error::invalid_block("no header".to_string()))?
                .try_into()?,
            num_txs: value.num_txs,
        })
    }
}

impl From<Meta> for RawMeta {
    fn from(value: Meta) -> Self {
        RawMeta {
            block_id: Some(value.block_id.into()),
            block_size: value.block_size,
            header: Some(value.header.into()),
            num_txs: value.num_txs,
        }
    }
}