Add constraints for relevant curves (#3)

bls12_377/src/constraints/curves.rs

@@ -0,0 +1,29 @@
+use crate::Parameters;
+use ark_r1cs_std::groups::bls12;
+
+/// An element of G1 in the BLS12-377 bilinear group.
+pub type G1Var = bls12::G1Var<Parameters>;
+/// An element of G2 in the BLS12-377 bilinear group.
+pub type G2Var = bls12::G2Var<Parameters>;
+
+/// Represents the cached precomputation that can be performed on a G1 element
+/// which enables speeding up pairing computation.
+pub type G1PreparedVar = bls12::G1PreparedVar<Parameters>;
+/// Represents the cached precomputation that can be performed on a G2 element
+/// which enables speeding up pairing computation.
+pub type G2PreparedVar = bls12::G2PreparedVar<Parameters>;
+
+#[test]
+fn test() {
+    use ark_ec::models::bls12::Bls12Parameters;
+    ark_curve_constraint_tests::curves::sw_test::<
+        <Parameters as Bls12Parameters>::G1Parameters,
+        G1Var,
+    >()
+    .unwrap();
+    ark_curve_constraint_tests::curves::sw_test::<
+        <Parameters as Bls12Parameters>::G2Parameters,
+        G2Var,
+    >()
+    .unwrap();
+}