Create Event Signature

Author: hendrikebbers

abi-parser/src/main/java/com/openelements/hiero/smartcontract/abi/model/AbiEvent.java

@@ -1,6 +1,7 @@
 package com.openelements.hiero.smartcontract.abi.model;
 
 import com.openelements.hiero.smartcontract.abi.util.HexConverter;
+import com.openelements.hiero.smartcontract.abi.util.KeccakUtil;
 import java.nio.charset.StandardCharsets;
 import java.util.List;
 import java.util.Objects;
@@ -27,19 +28,16 @@ public List<AbiParameter> getNonIndexedInputParameters() {
         return inputs.stream().filter(parameter -> !parameter.indexed()).toList();
     }
 
-
-        @NonNull
-    public String createEventSignature() {
+    @NonNull
+    private String createEventSignature() {
         final List<String> canonicalParameterTypes = inputs.stream().map(AbiParameter::getCanonicalType).toList();
         return name + "(" + String.join(",", canonicalParameterTypes) + ")";
     }
 
     @NonNull
-    public byte[] createEventSignatureHash() {
+    private byte[] createEventSignatureHash() {
         final String eventSignature = createEventSignature();
-        Keccak.DigestKeccak kecc = new Keccak.Digest256();
-        kecc.update(eventSignature.getBytes(StandardCharsets.UTF_8));
-        return kecc.digest();
+        return KeccakUtil.keccak256(eventSignature.getBytes(StandardCharsets.UTF_8));
     }
 
     @NonNull

abi-parser/src/main/java/com/openelements/hiero/smartcontract/abi/util/KeccakUtil.java

@@ -0,0 +1,12 @@
+package com.openelements.hiero.smartcontract.abi.util;
+
+import org.bouncycastle.jcajce.provider.digest.Keccak;
+
+public class KeccakUtil {
+
+    public static byte[] keccak256(final byte[] data) {
+        Keccak.DigestKeccak kecc = new Keccak.Digest256();
+        kecc.update(data);
+        return kecc.digest();
+    }
+}