darwinia-shadow 0.2.5

The shadow service for relayers and verify workers to retrieve header data and generate proof.
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use crate::{
    chain::eth::{EthHeader, EthashProof},
    mmr::{helper, Store},
};
use scale::{Decode, Encode};
use serde::Serialize;

/// Darwinia eth relay header thing
#[derive(Decode, Encode, Default)]
pub struct HeaderStuffs {
    eth_header: EthHeader,
    ethash_proof: Vec<EthashProof>,
    mmr_root: [u8; 32],
    mmr_proof: MMRProof,
}

/// MMR Proof Json
#[derive(Decode, Encode, Default)]
pub struct MMRProof {
    /// The index of member leaf
    member_leaf_index: u64,
    /// The index of of last leaf
    last_leaf_index: u64,
    /// The mmrProof of two leaves above
    proof: Vec<[u8; 32]>,
}

/// MMR Proof Json
#[derive(Decode, Encode, Default, Serialize)]
pub struct MMRProofJson {
    /// The index of member leaf
    pub member_leaf_index: u64,
    /// The index of of last leaf
    pub last_leaf_index: u64,
    /// The mmrProof of two leaves above
    pub proof: Vec<String>,
}

impl MMRProofJson {
    /// Generate MMRProof
    pub fn gen(store: &Store, member: u64, leaf: u64) -> Self {
        Self {
            member_leaf_index: member,
            last_leaf_index: leaf,
            proof: helper::gen_proof(store, member, leaf),
        }
    }
}