darkfi/tests/bridgetree_checkpoints.rs

/* This file is part of DarkFi (https://dark.fi)
 *
 * Copyright (C) 2020-2022 Dyne.org foundation
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */

use darkfi_sdk::{
    crypto::{MerkleNode, MerkleTree},
    incrementalmerkletree::Tree,
};
use halo2_proofs::arithmetic::Field;
use pasta_curves::pallas;
use rand::rngs::OsRng;

#[test]
fn bridgetree_checkpoints() {
    const MAX_CHECKPOINTS: usize = 100;
    let mut tree = MerkleTree::new(MAX_CHECKPOINTS);
    let mut roots = vec![];

    for _ in 0..MAX_CHECKPOINTS {
        let leaf = MerkleNode::from(pallas::Base::random(&mut OsRng));
        tree.append(&leaf);
        roots.push(tree.root(0).unwrap());
        tree.checkpoint();
    }

    for root in roots.iter().rev() {
        tree.rewind();
        assert!(root == &tree.root(0).unwrap());
    }
}