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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//! Commits to a Tendermint blockchain

use crate::{block, Vote};
#[cfg(feature = "serde")]
use serde::{Deserialize, Serialize};
use std::{ops::Deref, slice};

/// Last commit to a particular blockchain: +2/3 precommit signatures.
///
/// <https://github.com/tendermint/tendermint/blob/master/docs/spec/blockchain/blockchain.md#lastcommit>
#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
#[derive(Clone, Debug)]
pub struct LastCommit {
    /// Block ID of the last commit
    pub block_id: block::Id,

    /// Precommits
    pub precommits: Precommits,
}

/// Precommits which certify that a block is valid
#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
#[derive(Clone, Debug)]
pub struct Precommits(Option<Vec<Option<Vote>>>);

impl Precommits {
    /// Create a new precommit collection
    pub fn new<I>(into_precommits: I) -> Self
    where
        I: Into<Vec<Option<Vote>>>,
    {
        Self(Some(into_precommits.into()))
    }

    /// Convert this collection of precommits into a vector
    pub fn into_vec(self) -> Vec<Option<Vote>> {
        self.iter().cloned().collect()
    }

    /// Iterate over the precommits in the collection
    pub fn iter(&self) -> slice::Iter<Option<Vote>> {
        self.as_ref().iter()
    }
}

impl AsRef<[Option<Vote>]> for Precommits {
    fn as_ref(&self) -> &[Option<Vote>] {
        self.0.as_ref().map(Vec::as_slice).unwrap_or_else(|| &[])
    }
}

impl Deref for Precommits {
    type Target = [Option<Vote>];

    fn deref(&self) -> &[Option<Vote>] {
        self.as_ref()
    }
}