sanity check pairing precompile test

Author: ralexstokes

eth/precompiles/bls.py

@@ -43,6 +43,15 @@ def _parse_g1_point(data: bytes) -> G1Point:
     return point
 
 
+def _serialize_g1(result: G1Point) -> bytes:
+    return b"".join(
+        (
+            int(result[0]).to_bytes(64, byteorder="big"),
+            int(result[1]).to_bytes(64, byteorder="big"),
+        )
+    )
+
+
 def g1_add(computation: BaseComputation,
            gas_cost: int = constants.GAS_BLS_G1_ADD) -> BaseComputation:
     raise NotImplementedError()

tests/core/precompiles/test_bls.py

@@ -0,0 +1,10 @@
+from py_ecc.optimized_bls12_381.optimized_curve import G1, G2, neg, FQ12
+from eth.precompiles.bls import _pairing, _serialize_g2, _serialize_g1
+
+def test_pairing_precompile():
+    # assert pairing(G1, G2) * pairing(neg(G1), G2) == FQ12.one()
+    serialized_G1 = _serialize_g1(G1)
+    serialized_G2 = _serialize_g2(G2)
+    serialized_neg_G1 = _serialize_g1(neg(G1))
+    input_data = serialized_G1 + serialized_G2 + serialized_neg_G1 + serialized_G2
+    assert _pairing(input_data)