vrf-pbft 0.1.0

A Rust implementation of VRF-enhanced PBFT consensus protocol
Documentation 
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use serde::{Deserialize, Serialize};
use sha2::{Digest, Sha256};

pub type Hash = [u8; 32];
pub type NodeId = u64;

pub fn hash(data: &[u8]) -> Hash {
    Sha256::digest(data).into()
}

pub fn hex(h: &Hash) -> String {
    h.iter().map(|b| format!("{:02x}", b)).collect()
}

#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, Serialize, Deserialize)]
pub enum Role {
    Proposer,
    Validator,
    Packer,
    Normal,
}

#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, Serialize, Deserialize)]
pub enum Stage {
    Idle,
    PrePrepare,
    Prepare,
    Commit,
    Reply,
    Done,
}

#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct Block {
    pub round: u64,
    pub prev_hash: Hash,
    pub proposer: NodeId,
    pub seed: u64,
    pub data_hashes: Vec<Hash>,
}

impl Block {
    pub fn new(round: u64, prev_hash: Hash, proposer: NodeId, seed: u64) -> Self {
        Self {
            round,
            prev_hash,
            proposer,
            seed,
            data_hashes: Vec::new(),
        }
    }

    pub fn hash(&self) -> Hash {
        let bytes = bincode::serialize(self).expect("block serialization failed");
        hash(&bytes)
    }

    pub fn genesis() -> Self {
        Self::new(0, [0u8; 32], 0, 0)
    }
}