Add Grumpkin cycle implementation (#181)

* bn256+grumpkin from halo2curves

* chore: Integrate halo2curves more extensively

- Extend existing tests with additional test cases using the new curve types

* fix: Assign correct orders to bn256 and grumpkin scalar fields

- Swap scalar orders between grumpkin and bn256 in `impl_traits!` implementation

* test: Finish improving test integration with halo2curves

- Enhances test coverage for `pasta_curves` and `halo2curves`
- Cleans up commented code in `test_ivc_nontrivial` and `test_ivc_nontrivial_with_compression` tests
- Updates relevant test cases in `src/lib.rs` to include new curve tests

* chore: Remove commented-out/uneeded code in bn254_grumpkin.rs

* test: reproduce test_from_label for bn254_grumpkin

- Implement the `from_label_serial` function in bn254_grumpkin provider
- Add a test to compare parallel and serial implementations of `from_label` function

* refactor: Clean up to_coordinate & summarize changes

* refactor: rename bn254_grumpkin -> bn256_grumpkin

* test: Expand testing for public params digest using bn256 and grumpkin

* chore: Update halo2curves dependency in Cargo.toml

- Updated the `halo2curves` dependency in `Cargo.toml` to the latest version `0.1.0` from a specific git branch.

* refactor: Refactor multi-exponentiation methods across providers

- Updated bn256_grumpkin.rs to use the cpu_best_multiexp function from pasta provider instead of its native function.
- Modified visibility of cpu_best_multiexp function in pasta.rs from private to crate level.

* chore: set up dependencies to import the correct getrandom feature on Wasm

---------

Co-authored-by: Leo Alt <leo@ethereum.org>

src/lib.rs

@@ -793,6 +793,7 @@ fn compute_digest<G: Group, T: Serialize>(o: &T) -> G::Scalar {
 
 #[cfg(test)]
 mod tests {
+  use crate::provider::bn256_grumpkin::{bn256, grumpkin};
   use crate::provider::pedersen::CommitmentKeyExtTrait;
 
   use super::*;
@@ -895,6 +896,23 @@ mod tests {
       trivial_circuit2,
       "3f7b25f589f2da5ab26254beba98faa54f6442ebf5fa5860caf7b08b576cab00",
     );
+
+    let trivial_circuit1_grumpkin =
+      TrivialTestCircuit::<<bn256::Point as Group>::Scalar>::default();
+    let trivial_circuit2_grumpkin =
+      TrivialTestCircuit::<<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, _, _>(
+      trivial_circuit1_grumpkin,
+      trivial_circuit2_grumpkin.clone(),
+      "967acca1d6b4731cd65d4072c12bbaca9648f24d7bcc2877aee720e4265d4302",
+    );
+    test_pp_digest_with::<bn256::Point, grumpkin::Point, _, _>(
+      cubic_circuit1_grumpkin,
+      trivial_circuit2_grumpkin,
+      "44629f26a78bf6c4e3077f940232050d1793d304fdba5e221d0cf66f76a37903",
+    );
   }
 
   fn test_ivc_trivial_with<G1, G2>()
@@ -949,6 +967,8 @@ mod tests {
     type G1 = pasta_curves::pallas::Point;
     type G2 = pasta_curves::vesta::Point;
     test_ivc_trivial_with::<G1, G2>();
+
+    test_ivc_trivial_with::<bn256::Point, grumpkin::Point>();
   }
 
   fn test_ivc_nontrivial_with<G1, G2>()
@@ -1030,6 +1050,7 @@ mod tests {
     type G2 = pasta_curves::vesta::Point;
 
     test_ivc_nontrivial_with::<G1, G2>();
+    test_ivc_nontrivial_with::<bn256::Point, grumpkin::Point>();
   }
 
   fn test_ivc_nontrivial_with_compression_with<G1, G2>()
@@ -1124,6 +1145,7 @@ mod tests {
     type G2 = pasta_curves::vesta::Point;
 
     test_ivc_nontrivial_with_compression_with::<G1, G2>();
+    test_ivc_nontrivial_with_compression_with::<bn256::Point, grumpkin::Point>();
   }
 
   fn test_ivc_nontrivial_with_spark_compression_with<G1, G2>()
@@ -1221,6 +1243,7 @@ mod tests {
     type G2 = pasta_curves::vesta::Point;
 
     test_ivc_nontrivial_with_spark_compression_with::<G1, G2>();
+    test_ivc_nontrivial_with_spark_compression_with::<bn256::Point, grumpkin::Point>();
   }
 
   fn test_ivc_nondet_with_compression_with<G1, G2>()
@@ -1377,6 +1400,7 @@ mod tests {
     type G2 = pasta_curves::vesta::Point;
 
     test_ivc_nondet_with_compression_with::<G1, G2>();
+    test_ivc_nondet_with_compression_with::<bn256::Point, grumpkin::Point>();
   }
 
   fn test_ivc_base_with<G1, G2>()
@@ -1443,5 +1467,6 @@ mod tests {
     type G2 = pasta_curves::vesta::Point;
 
     test_ivc_base_with::<G1, G2>();
+    test_ivc_base_with::<bn256::Point, grumpkin::Point>();
   }
 }