Merge pull request #71 from lurk-lab/zeromorph_wip

Zeromorph EvaluationEngine trait

Author: huitseeker

Cargo.toml

@@ -45,6 +45,7 @@ cfg-if = "1.0.0"
 once_cell = "1.18.0"
 anyhow = "1.0.72"
 rand = "0.8.4"
+rand_xorshift = "0.3.0"
 
 [target.'cfg(any(target_arch = "x86_64", target_arch = "aarch64"))'.dependencies]
 pasta-msm = { git="https://github.com/lurk-lab/pasta-msm", branch="dev", version = "0.1.4" }

ThirdPartyNotices.txt

@@ -52,3 +52,22 @@ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLI
 WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+------------------------------------------------------------
+https://github.com/AztecProtocol/aztec-packages/
+
+Licensed under Apache 2.0
+
+Copyright 2022 Aztec
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.

examples/minroot_serde.rs

@@ -194,7 +194,7 @@ fn main() {
       MinRootCircuit<<G1 as Group>::Scalar>,
       TrivialCircuit<<G2 as Group>::Scalar>,
     >::new(&circuit_primary, &circuit_secondary, None, None);
-    assert!(result.clone() == pp, "not equal!");
+    assert!(*result == pp, "not equal!");
     assert!(remaining.is_empty());
   } else {
     println!("Something terrible happened");

src/lib.rs

@@ -948,13 +948,10 @@ mod tests {
   use core::fmt::Write;
 
   use super::*;
-  #[allow(dead_code)]
-  type ZM<E> = provider::non_hiding_zeromorph::ZMEvaluation<E>;
+  type ZM<E> = provider::non_hiding_zeromorph::ZMPCS<E>;
   type EE<G> = provider::ipa_pc::EvaluationEngine<G>;
   type S<G, EE> = spartan::snark::RelaxedR1CSSNARK<G, EE>;
   type SPrime<G, EE> = spartan::ppsnark::RelaxedR1CSSNARK<G, EE>;
-  #[allow(dead_code)]
-  type SZM<G1, E> = spartan::snark::RelaxedR1CSSNARK<G1, ZM<E>>;
 
   use ::bellpepper_core::{num::AllocatedNum, ConstraintSystem, SynthesisError};
   use core::marker::PhantomData;
@@ -1068,12 +1065,12 @@ mod tests {
     let trivial_circuit2_grumpkin = TrivialCircuit::<<grumpkin::Point as Group>::Scalar>::default();
     let cubic_circuit1_grumpkin = CubicCircuit::<<bn256::Point as Group>::Scalar>::default();
 
-    test_pp_digest_with::<bn256::Point, grumpkin::Point, _, _, EE<_>, EE<_>>(
+    test_pp_digest_with::<bn256::Point, grumpkin::Point, _, _, ZM<halo2curves::bn256::Bn256>, EE<_>>(
       &trivial_circuit1_grumpkin,
       &trivial_circuit2_grumpkin,
       "184d05f08dca260f010cb48c6cf8c5eb61dedfc270e5a18226eb622cf7da0203",
     );
-    test_pp_digest_with::<bn256::Point, grumpkin::Point, _, _, EE<_>, EE<_>>(
+    test_pp_digest_with::<bn256::Point, grumpkin::Point, _, _, ZM<halo2curves::bn256::Bn256>, EE<_>>(
       &cubic_circuit1_grumpkin,
       &trivial_circuit2_grumpkin,
       "2fb992932b2a642b4ce8f52646a7ef6a5a486682716cf969df50021107afff03",
@@ -1306,8 +1303,7 @@ mod tests {
     let (pk, vk) = CompressedSNARK::<_, _, _, _, S1, S2>::setup(&pp).unwrap();
 
     // produce a compressed SNARK
-    let res =
-      CompressedSNARK::<_, _, _, _, S1, S2>::prove(&pp, &pk, &recursive_snark);
+    let res = CompressedSNARK::<_, _, _, _, S1, S2>::prove(&pp, &pk, &recursive_snark);
     assert!(res.is_ok());
     let compressed_snark = res.unwrap();
 
@@ -1330,7 +1326,7 @@ mod tests {
     test_ivc_nontrivial_with_compression_with::<
       bn256::Point,
       grumpkin::Point,
-      S<bn256::Point, EE<_>>, // SZM<bn256::Point, halo2curves::bn256::Bn256>,
+      S<bn256::Point, ZM<halo2curves::bn256::Bn256>>,
       S<grumpkin::Point, EE<_>>,
     >();
     test_ivc_nontrivial_with_compression_with::<
@@ -1341,17 +1337,6 @@ mod tests {
     >();
   }
 
-  #[test]
-  #[ignore]
-  fn test_ivc_nontrivial_with_zm_compression() {
-    test_ivc_nontrivial_with_compression_with::<
-      bn256::Point,
-      grumpkin::Point,
-      S<bn256::Point, EE<_>>, // SZM<bn256::Point, halo2curves::bn256::Bn256>,
-      S<grumpkin::Point, EE<_>>,
-    >();
-  }
-
   fn test_ivc_nontrivial_with_spark_compression_with<G1, G2, E1, E2>()
   where
     G1: Group<Base = <G2 as Group>::Scalar>,
@@ -1456,8 +1441,12 @@ mod tests {
     type G2 = pasta_curves::vesta::Point;
 
     test_ivc_nontrivial_with_spark_compression_with::<G1, G2, EE<_>, EE<_>>();
-    test_ivc_nontrivial_with_spark_compression_with::<bn256::Point, grumpkin::Point, EE<_>, EE<_>>(
-    );
+    test_ivc_nontrivial_with_spark_compression_with::<
+      bn256::Point,
+      grumpkin::Point,
+      ZM<halo2curves::bn256::Bn256>,
+      EE<_>,
+    >();
     test_ivc_nontrivial_with_spark_compression_with::<
       secp256k1::Point,
       secq256k1::Point,
@@ -1610,7 +1599,12 @@ mod tests {
     type G2 = pasta_curves::vesta::Point;
 
     test_ivc_nondet_with_compression_with::<G1, G2, EE<_>, EE<_>>();
-    test_ivc_nondet_with_compression_with::<bn256::Point, grumpkin::Point, EE<_>, EE<_>>();
+    test_ivc_nondet_with_compression_with::<
+      bn256::Point,
+      grumpkin::Point,
+      ZM<halo2curves::bn256::Bn256>,
+      EE<_>,
+    >();
     test_ivc_nondet_with_compression_with::<secp256k1::Point, secq256k1::Point, EE<_>, EE<_>>();
   }
 

src/provider/bn256_grumpkin.rs

@@ -27,6 +27,8 @@ use halo2curves::grumpkin::{
   G1Affine as GrumpkinAffine, G1Compressed as GrumpkinCompressed, G1 as GrumpkinPoint,
 };
 
+use super::kzg_commitment::KZGCommitmentEngine;
+
 /// Re-exports that give access to the standard aliases used in the code base, for bn256
 pub mod bn256 {
   pub use halo2curves::bn256::{
@@ -58,7 +60,8 @@ impl_traits!(
   Bn256Compressed,
   Bn256Point,
   Bn256Affine,
-  "30644e72e131a029b85045b68181585d2833e84879b9709143e1f593f0000001"
+  "30644e72e131a029b85045b68181585d2833e84879b9709143e1f593f0000001",
+  KZGCommitmentEngine<halo2curves::bn256::Bn256>
 );
 
 impl_traits!(

src/provider/kzg_commitment.rs

@@ -0,0 +1,72 @@
+//! Commitment engine for KZG commitments
+//!
+
+use std::marker::PhantomData;
+
+use group::{prime::PrimeCurveAffine, Curve};
+use pairing::Engine;
+use rand::rngs::StdRng;
+use rand_core::SeedableRng;
+use serde::{Deserialize, Serialize};
+
+use crate::traits::{
+  commitment::{CommitmentEngineTrait, Len},
+  Group,
+};
+
+use super::{
+  non_hiding_kzg::{UVKZGCommitment, UVUniversalKZGParam},
+  pedersen::Commitment,
+};
+
+/// Provides a commitment engine
+#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
+pub struct KZGCommitmentEngine<E: Engine> {
+  _p: PhantomData<E>,
+}
+
+impl<E: Engine> CommitmentEngineTrait<E::G1> for KZGCommitmentEngine<E>
+where
+  E::G1: Group<PreprocessedGroupElement = E::G1Affine>,
+  E::G1Affine: Serialize + for<'de> Deserialize<'de>,
+  E::G2Affine: Serialize + for<'de> Deserialize<'de>,
+{
+  type CommitmentKey = UVUniversalKZGParam<E>;
+  type Commitment = Commitment<E::G1>;
+
+  fn setup(label: &'static [u8], n: usize) -> Self::CommitmentKey {
+    // TODO: this is just for testing, replace by grabbing from a real setup for production
+    let mut bytes = [0u8; 32];
+    let len = label.len().min(32);
+    bytes[..len].copy_from_slice(&label[..len]);
+    let rng = &mut StdRng::from_seed(bytes);
+    UVUniversalKZGParam::gen_srs_for_testing(rng, n.next_power_of_two())
+  }
+
+  fn commit(ck: &Self::CommitmentKey, v: &[<E::G1 as Group>::Scalar]) -> Self::Commitment {
+    assert!(ck.length() >= v.len());
+    Commitment {
+      comm: E::G1::vartime_multiscalar_mul(v, &ck.powers_of_g[..v.len()]),
+    }
+  }
+}
+
+impl<E: Engine> From<Commitment<E::G1>> for UVKZGCommitment<E>
+where
+  E::G1: Group,
+{
+  fn from(c: Commitment<E::G1>) -> Self {
+    UVKZGCommitment(c.comm.to_affine())
+  }
+}
+
+impl<E: Engine> From<UVKZGCommitment<E>> for Commitment<E::G1>
+where
+  E::G1: Group,
+{
+  fn from(c: UVKZGCommitment<E>) -> Self {
+    Commitment {
+      comm: c.0.to_curve(),
+    }
+  }
+}

src/provider/mod.rs

@@ -13,6 +13,7 @@ pub mod poseidon;
 pub mod secp_secq;
 
 // a non-hiding variant of {kzg, zeromorph}
+pub mod kzg_commitment;
 pub mod non_hiding_kzg;
 pub mod non_hiding_zeromorph;
 
@@ -156,7 +157,24 @@ macro_rules! impl_traits {
     $name_compressed:ident,
     $name_curve:ident,
     $name_curve_affine:ident,
-    $order_str:literal
+    $order_str:expr
+  ) => {
+    impl_traits!(
+      $name,
+      $name_compressed,
+      $name_curve,
+      $name_curve_affine,
+      $order_str,
+      CommitmentEngine<Self>
+    );
+  };
+  (
+    $name:ident,
+    $name_compressed:ident,
+    $name_curve:ident,
+    $name_curve_affine:ident,
+    $order_str:literal,
+    $commitment_engine:ty
   ) => {
     impl Group for $name::Point {
       type Base = $name::Base;
@@ -166,7 +184,7 @@ macro_rules! impl_traits {
       type RO = PoseidonRO<Self::Base, Self::Scalar>;
       type ROCircuit = PoseidonROCircuit<Self::Base>;
       type TE = Keccak256Transcript<Self>;
-      type CE = CommitmentEngine<Self>;
+      type CE = $commitment_engine;
 
       fn vartime_multiscalar_mul(
         scalars: &[Self::Scalar],