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83 lines
2.8 KiB
Rust
83 lines
2.8 KiB
Rust
/* This file is part of DarkFi (https://dark.fi)
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*
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* Copyright (C) 2020-2024 Dyne.org foundation
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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use darkfi_sdk::crypto::smt::{MemoryStorageFp, PoseidonFp, SmtMemoryFp};
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use halo2_proofs::{arithmetic::Field, circuit::Value, dev::MockProver, pasta::Fp};
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use rand::rngs::OsRng;
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use darkfi::{
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zk::{
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proof::{ProvingKey, VerifyingKey},
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vm::ZkCircuit,
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vm_heap::{empty_witnesses, Witness},
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Proof,
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},
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zkas::ZkBinary,
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Result,
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};
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#[test]
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fn zkvm_smt() -> Result<()> {
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let bincode = include_bytes!("../proof/smt.zk.bin");
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let zkbin = ZkBinary::decode(bincode)?;
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let hasher = PoseidonFp::new();
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let empty_leaf = Fp::from(0);
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let store = MemoryStorageFp::new();
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let mut smt = SmtMemoryFp::new(store, hasher.clone(), empty_leaf.clone());
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let leaves = vec![Fp::random(&mut OsRng), Fp::random(&mut OsRng), Fp::random(&mut OsRng)];
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// Use the leaf value as its position in the SMT
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// Therefore we need an additional constraint that leaf == pos
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let leaves: Vec<_> = leaves.into_iter().map(|l| (l, l)).collect();
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smt.insert_batch(leaves.clone());
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let (pos, leaf) = leaves[2];
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assert_eq!(pos, leaf);
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assert_eq!(smt.get_leaf(&pos), leaf);
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let root = smt.root();
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let path = smt.prove_membership(&pos);
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assert!(path.verify(&root, &leaf, &pos));
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// Values for the proof
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let prover_witnesses = vec![
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Witness::Base(Value::known(root)),
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Witness::SparseMerklePath(Value::known(path.path)),
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Witness::Base(Value::known(leaf)),
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];
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let public_inputs = vec![root];
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let circuit = ZkCircuit::new(prover_witnesses, &zkbin);
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let mockprover = MockProver::run(zkbin.k, &circuit, vec![public_inputs.clone()])?;
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mockprover.assert_satisfied();
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let proving_key = ProvingKey::build(zkbin.k, &circuit);
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let proof = Proof::create(&proving_key, &[circuit], &public_inputs, &mut OsRng)?;
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let verifier_witnesses = empty_witnesses(&zkbin)?;
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let circuit = ZkCircuit::new(verifier_witnesses, &zkbin);
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let verifying_key = VerifyingKey::build(zkbin.k, &circuit);
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proof.verify(&verifying_key, &public_inputs)?;
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Ok(())
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}
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