event and error data types

Author: hendrikebbers

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

@@ -2,7 +2,7 @@
 
 import java.util.List;
 
-public interface AbiEntry {
+public sealed interface AbiEntry permits AbiEvent, AbiError, AbiFunction {
 
     AbiEntryType type();
 

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

@@ -4,6 +4,7 @@
 
 public enum AbiEntryType {
     FUNCTION,
+    ERROR,
     EVENT,
     CONSTRUCTOR,
     RECEIVE,
@@ -13,6 +14,7 @@ public static AbiEntryType of(String name) {
         return switch (name) {
             case "function" -> FUNCTION;
             case "event" -> EVENT;
+            case "error" -> ERROR;
             case "constructor" -> CONSTRUCTOR;
             case "receive" -> RECEIVE;
             case "fallback" -> FALLBACK;

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

@@ -0,0 +1,18 @@
+package com.openelements.hiero.smartcontract.abi.model;
+
+import java.util.List;
+import java.util.Objects;
+import org.jspecify.annotations.NonNull;
+
+public record AbiError(@NonNull String name, @NonNull List<AbiParameter> inputs) implements AbiEntry {
+
+    public AbiError {
+        Objects.requireNonNull(name, "name");
+        Objects.requireNonNull(inputs, "inputs");
+    }
+
+    @Override
+    public AbiEntryType type() {
+        return AbiEntryType.ERROR;
+    }
+}

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

@@ -0,0 +1,19 @@
+package com.openelements.hiero.smartcontract.abi.model;
+
+import java.util.List;
+import java.util.Objects;
+import org.jspecify.annotations.NonNull;
+import org.jspecify.annotations.Nullable;
+
+public record AbiEvent(@NonNull String name, @NonNull List<AbiParameter> inputs, boolean anonymous) implements AbiEntry{
+
+    public AbiEvent {
+        Objects.requireNonNull(name, "name");
+        Objects.requireNonNull(inputs, "inputs");
+    }
+
+    @Override
+    public AbiEntryType type() {
+        return AbiEntryType.EVENT;
+    }
+}

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

@@ -9,4 +9,23 @@ public record AbiModel(@NonNull List<AbiEntry> entries) {
     public AbiModel {
         Objects.requireNonNull(entries, "entries");
     }
+
+    public List<AbiFunction> getFunctions() {
+        return getEntriesOfType(AbiFunction.class);
+    }
+
+    public List<AbiEvent> getEvents() {
+        return getEntriesOfType(AbiEvent.class);
+    }
+
+    public List<AbiError> getErrors() {
+        return getEntriesOfType(AbiError.class);
+    }
+
+    private <T extends AbiEntry> List<T> getEntriesOfType(Class<T> type) {
+        return entries.stream()
+                .filter(type::isInstance)
+                .map(type::cast)
+                .toList();
+    }
 }