mtcs-garage/crates/client-guest/src/main.rs

//! Client side zkvm program.
#![no_main]
sp1_zkvm::entrypoint!(main);

use ed25519_dalek_patched::{VerifyingKey, Signature, SecretKey};
use sp1_zkvm::io;
// use sha2::{digest::Digest, Sha256};
use serde::{Deserialize, Serialize};
use serde_big_array::BigArray;

#[derive(Serialize, Deserialize, Debug, PartialEq)]
struct InputLength(u64);

#[derive(Serialize, Deserialize, Debug, PartialEq)]
struct Secret([u8; 32]);

#[derive(Serialize, Deserialize, Debug, PartialEq)]
struct InputHead {
    salt: [u8; 32],
    from: [u8; 32],
    val: u32,
    to: [u8; 32],
    hash: [u8; 32],
    #[serde(with = "BigArray")]
    signature: [u8; 64],
    public_key: [u8; 32],
    root: [u8; 32],
}

pub fn main() {
    let length = sp1_zkvm::io::read::<InputLength>().0;
    let input_head = sp1_zkvm::io::read::<InputHead>();
    let secret = sp1_zkvm::io::read::<Secret>().0;
    let hashes: Vec<u8> = sp1_zkvm::io::read_vec();

    let pk = VerifyingKey::from_bytes(&input_head.public_key).unwrap();
    assert!(pk.verify_strict(
        &input_head.from
            .iter()
            .chain(input_head.val.to_le_bytes().iter())
            .chain(input_head.to.iter())
            .cloned()
            .collect::<Vec<u8>>(),
        &Signature::from_bytes(&input_head.signature),
    ).is_ok());
    // TODO check membership
    sp1_zkvm::io::commit_slice(&input_head.hash);
    sp1_zkvm::io::commit_slice(&input_head.root);
}