GraphQL serializes BlobVersionedHashes (#6769)

Fix error where GraphQL fails to serialize the versioned hash of a
blob transaction.

Signed-off-by: Danno Ferrin (shemnon) <danno.ferrin@shemnon.com>

ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/graphql/internal/Scalars.java

@@ -15,6 +15,7 @@
 package org.hyperledger.besu.ethereum.api.graphql.internal;
 
 import org.hyperledger.besu.datatypes.Address;
+import org.hyperledger.besu.datatypes.VersionedHash;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.results.Quantity;
 
 import java.math.BigInteger;
@@ -256,6 +257,8 @@ public class Scalars {
                 return null;
               }
             }
+          } else if (input instanceof VersionedHash versionedHash) {
+            return versionedHash.toBytes();
           } else {
             return null;
           }

ethereum/api/src/test/java/org/hyperledger/besu/ethereum/api/graphql/scalar/Bytes32ScalarTest.java

@@ -17,6 +17,8 @@ package org.hyperledger.besu.ethereum.api.graphql.scalar;
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.api.Assertions.assertThatThrownBy;
 
+import org.hyperledger.besu.datatypes.Hash;
+import org.hyperledger.besu.datatypes.VersionedHash;
 import org.hyperledger.besu.ethereum.api.graphql.internal.Scalars;
 
 import java.util.Locale;
@@ -42,6 +44,8 @@ public class Bytes32ScalarTest {
   private final StringValue strValue = StringValue.newStringValue(str).build();
   private final StringValue invalidStrValue = StringValue.newStringValue("0xgh").build();
 
+  private final VersionedHash versionedHash = new VersionedHash((byte)1, Hash.hash(value));
+
   @Test
   public void pareValueTest() {
     final var result =
@@ -121,6 +125,12 @@ public class Bytes32ScalarTest {
         .isInstanceOf(CoercingParseLiteralException.class);
   }
 
+  @Test
+  public void parseVersionedHash() {
+    assertThat(scalar.getCoercing().serialize(versionedHash, GraphQLContext.newContext().build(), Locale.ENGLISH))
+        .isEqualTo(versionedHash.toString());
+  }
+
   @BeforeEach
   public void before() {
     scalar = Scalars.bytes32Scalar();