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Merge pull request #761 from dusk-network/mocello/pi_outofbounds
Add test and fix for panic on prove
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// This Source Code Form is subject to the terms of the Mozilla Public | ||
// License, v. 2.0. If a copy of the MPL was not distributed with this | ||
// file, You can obtain one at http://mozilla.org/MPL/2.0/. | ||
// | ||
// Copyright (c) DUSK NETWORK. All rights reserved. | ||
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use dusk_plonk::prelude::*; | ||
use rand::rngs::StdRng; | ||
use rand::SeedableRng; | ||
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const CAPACITY: usize = 1 << 4; | ||
const LABEL: &[u8] = b"check_public_inputs"; | ||
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#[derive(Default)] | ||
pub struct TestSize { | ||
witnesses: Vec<BlsScalar>, | ||
sum: BlsScalar, | ||
} | ||
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impl TestSize { | ||
pub fn new(witnesses: Vec<BlsScalar>, sum: BlsScalar) -> Self { | ||
Self { witnesses, sum } | ||
} | ||
} | ||
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impl Circuit for TestSize { | ||
fn circuit<C>(&self, composer: &mut C) -> Result<(), Error> | ||
where | ||
C: Composer, | ||
{ | ||
let sum = self.witnesses.iter().fold(C::ZERO, |acc, scalar| { | ||
let w = composer.append_witness(*scalar); | ||
let constraint = Constraint::new().left(1).a(acc).right(1).b(w); | ||
composer.gate_add(constraint) | ||
}); | ||
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let expected_sum = composer.append_witness(self.sum); | ||
composer.assert_equal(sum, expected_sum); | ||
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Ok(()) | ||
} | ||
} | ||
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#[test] | ||
fn size() { | ||
let rng = &mut StdRng::seed_from_u64(0x10b); | ||
let pp = PublicParameters::setup(CAPACITY, rng) | ||
.expect("Creation of public parameter shouldn't fail"); | ||
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// compiling the default version of TestSize, which only one gate: sum = 0 | ||
let (prover, _verifier) = Compiler::compile::<TestSize>(&pp, LABEL) | ||
.expect("It should be possible to compile the prover and verifier"); | ||
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// Create circuit with more gates | ||
let pi: Vec<BlsScalar> = [BlsScalar::one(); 5].into(); | ||
let sum = pi.iter().sum(); | ||
let circuit = TestSize::new(pi, sum); | ||
let result = prover.prove(rng, &circuit); | ||
assert_eq!( | ||
result, | ||
Err(Error::InvalidCircuitSize), | ||
"proof creation for different sized circuit shouldn't be possible" | ||
); | ||
} |