error message consistency

Signed-off-by: garyschulte <[email protected]>

gnark/gnark-jni/gnark-eip-196.go

@@ -20,7 +20,6 @@ import (
 var ErrMalformedPointEIP196 = errors.New("invalid point encoding")
 var ErrInvalidInputPairingLengthEIP196 = errors.New("invalid input parameters, invalid input length for pairing")
 var ErrPointNotInFieldEIP196 = errors.New("point not in field")
-var ErrPointOnCurveCheckFailedEIP196 = errors.New("point is not on curve")
 var ErrPointInSubgroupCheckFailedEIP196 = errors.New("point is not in subgroup")
 
 const (
@@ -282,7 +281,7 @@ func safeUnmarshalEIP196(g1 *bn254.G1Affine, input []byte, offset int) (error) {
         }
         err := g1.Y.SetBytesCanonical(pointBytes[32:64])
         if (err == nil) {
-            if (!g1.IsOnCurve()) {
+            if (!g1.IsInSubGroup()) {
                 return ErrPointInSubgroupCheckFailedEIP196
             }
             return nil
@@ -308,7 +307,7 @@ func safeUnmarshalG2EIP196(g2 *bn254.G2Affine, input []byte) (error) {
     g2.Y.A1.SetBytesCanonical(input[64:96])
     g2.Y.A0.SetBytesCanonical(input[96:128])
     if (!g2.IsInSubGroup()) {
-        return ErrPointOnCurveCheckFailedEIP196
+        return ErrPointInSubgroupCheckFailedEIP196
     }
 
     return nil

gnark/src/test/java/org/hyperledger/besu/nativelib/gnark/AltBN128PairingPrecompiledContractLegacyTest.java

@@ -130,7 +130,7 @@ public void compute_invalidPointsOutsideSubgroupG2() {
     // assert there is an error
     assertThat(errorLength.getValue()).isNotEqualTo(0);
     String errorStr = new String(error, 0, errorLength.getValue());
-    assertThat(errorStr).isEqualTo("invalid input parameters, point is not on curve");
+    assertThat(errorStr).isEqualTo("invalid input parameters, point is not in subgroup");
     // assert there is no output
     assertThat(outputLength.getValue()).isEqualTo(0);
   }