diff --git a/deob/src/main/java/dev/openrs2/deob/analysis/ConstSourceInterpreter.java b/deob/src/main/java/dev/openrs2/deob/analysis/ConstSourceInterpreter.java
deleted file mode 100644
index 72750abf21..0000000000
--- a/deob/src/main/java/dev/openrs2/deob/analysis/ConstSourceInterpreter.java
+++ /dev/null
@@ -1,117 +0,0 @@
-package dev.openrs2.deob.analysis;
-
-import java.util.List;
-
-import com.google.common.collect.ImmutableList;
-import dev.openrs2.asm.InsnNodeUtilsKt;
-import org.objectweb.asm.Opcodes;
-import org.objectweb.asm.Type;
-import org.objectweb.asm.tree.AbstractInsnNode;
-import org.objectweb.asm.tree.analysis.AnalyzerException;
-import org.objectweb.asm.tree.analysis.BasicInterpreter;
-import org.objectweb.asm.tree.analysis.BasicValue;
-import org.objectweb.asm.tree.analysis.Interpreter;
-
-public final class ConstSourceInterpreter extends Interpreter<ConstSourceValue> {
-	private final Interpreter<BasicValue> basicInterpreter = new BasicInterpreter();
-
-	public ConstSourceInterpreter() {
-		super(Opcodes.ASM7);
-	}
-
-	@Override
-	public ConstSourceValue newValue(Type type) {
-		var basicValue = basicInterpreter.newValue(type);
-		if (basicValue == null) {
-			return null;
-		}
-
-		return ConstSourceValue.createUnknown(basicValue);
-	}
-
-	@Override
-	public ConstSourceValue newOperation(AbstractInsnNode insn) throws AnalyzerException {
-		var basicValue = basicInterpreter.newOperation(insn);
-		if (basicValue == null) {
-			return null;
-		}
-
-		if (InsnNodeUtilsKt.getIntConstant(insn) != null) {
-			return ConstSourceValue.createSingleSourceConstant(basicValue, insn);
-		}
-
-		return ConstSourceValue.createUnknown(basicValue);
-	}
-
-	@Override
-	public ConstSourceValue copyOperation(AbstractInsnNode insn, ConstSourceValue value) throws AnalyzerException {
-		var basicValue = basicInterpreter.copyOperation(insn, value.getBasicValue());
-		if (basicValue == null) {
-			return null;
-		}
-
-		return ConstSourceValue.createUnknown(basicValue);
-	}
-
-	@Override
-	public ConstSourceValue unaryOperation(AbstractInsnNode insn, ConstSourceValue value) throws AnalyzerException {
-		var basicValue = basicInterpreter.unaryOperation(insn, value.getBasicValue());
-		if (basicValue == null) {
-			return null;
-		}
-
-		return ConstSourceValue.createUnknown(basicValue);
-	}
-
-	@Override
-	public ConstSourceValue binaryOperation(AbstractInsnNode insn, ConstSourceValue value1, ConstSourceValue value2) throws AnalyzerException {
-		var basicValue = basicInterpreter.binaryOperation(insn, value1.getBasicValue(), value2.getBasicValue());
-		if (basicValue == null) {
-			return null;
-		}
-
-		return ConstSourceValue.createUnknown(basicValue);
-	}
-
-	@Override
-	public ConstSourceValue ternaryOperation(AbstractInsnNode insn, ConstSourceValue value1, ConstSourceValue value2, ConstSourceValue value3) throws AnalyzerException {
-		var basicValue = basicInterpreter.ternaryOperation(insn, value1.getBasicValue(), value2.getBasicValue(), value3.getBasicValue());
-		if (basicValue == null) {
-			return null;
-		}
-
-		return ConstSourceValue.createUnknown(basicValue);
-	}
-
-	@Override
-	public ConstSourceValue naryOperation(AbstractInsnNode insn, List<? extends ConstSourceValue> values) throws AnalyzerException {
-		var args = values.stream()
-			.map(ConstSourceValue::getBasicValue)
-			.collect(ImmutableList.toImmutableList());
-		var basicValue = basicInterpreter.naryOperation(insn, args);
-		if (basicValue == null) {
-			return null;
-		}
-
-		return ConstSourceValue.createUnknown(basicValue);
-	}
-
-	@Override
-	public void returnOperation(AbstractInsnNode insn, ConstSourceValue value, ConstSourceValue expected) throws AnalyzerException {
-		basicInterpreter.returnOperation(insn, value.getBasicValue(), expected.getBasicValue());
-	}
-
-	@Override
-	public ConstSourceValue merge(ConstSourceValue value1, ConstSourceValue value2) {
-		var basicValue = basicInterpreter.merge(value1.getBasicValue(), value2.getBasicValue());
-		if (basicValue == null) {
-			return null;
-		}
-
-		if (value1.isSingleSourceConstant() && value1.equals(value2)) {
-			return value1;
-		}
-
-		return ConstSourceValue.createUnknown(basicValue);
-	}
-}
diff --git a/deob/src/main/java/dev/openrs2/deob/analysis/ConstSourceInterpreter.kt b/deob/src/main/java/dev/openrs2/deob/analysis/ConstSourceInterpreter.kt
new file mode 100644
index 0000000000..da4706a997
--- /dev/null
+++ b/deob/src/main/java/dev/openrs2/deob/analysis/ConstSourceInterpreter.kt
@@ -0,0 +1,92 @@
+package dev.openrs2.deob.analysis
+
+import dev.openrs2.asm.intConstant
+import org.objectweb.asm.Opcodes
+import org.objectweb.asm.Type
+import org.objectweb.asm.tree.AbstractInsnNode
+import org.objectweb.asm.tree.analysis.AnalyzerException
+import org.objectweb.asm.tree.analysis.BasicInterpreter
+import org.objectweb.asm.tree.analysis.Interpreter
+
+class ConstSourceInterpreter : Interpreter<ConstSourceValue>(Opcodes.ASM7) {
+    private val basicInterpreter = BasicInterpreter()
+
+    override fun newValue(type: Type?): ConstSourceValue? {
+        val basicValue = basicInterpreter.newValue(type) ?: return null
+        return ConstSourceValue.createUnknown(basicValue)
+    }
+
+    @Throws(AnalyzerException::class)
+    override fun newOperation(insn: AbstractInsnNode): ConstSourceValue {
+        val basicValue = basicInterpreter.newOperation(insn)
+        return if (insn.intConstant != null) {
+            ConstSourceValue.createSingleSourceConstant(basicValue, insn)
+        } else {
+            ConstSourceValue.createUnknown(basicValue)
+        }
+    }
+
+    @Throws(AnalyzerException::class)
+    override fun copyOperation(insn: AbstractInsnNode, value: ConstSourceValue): ConstSourceValue {
+        val basicValue = basicInterpreter.copyOperation(insn, value.basicValue)
+        return ConstSourceValue.createUnknown(basicValue)
+    }
+
+    @Throws(AnalyzerException::class)
+    override fun unaryOperation(insn: AbstractInsnNode, value: ConstSourceValue): ConstSourceValue? {
+        val basicValue = basicInterpreter.unaryOperation(insn, value.basicValue) ?: return null
+        return ConstSourceValue.createUnknown(basicValue)
+    }
+
+    @Throws(AnalyzerException::class)
+    override fun binaryOperation(
+        insn: AbstractInsnNode,
+        value1: ConstSourceValue,
+        value2: ConstSourceValue
+    ): ConstSourceValue? {
+        val basicValue =
+            basicInterpreter.binaryOperation(insn, value1.basicValue, value2.basicValue)
+                ?: return null
+        return ConstSourceValue.createUnknown(basicValue)
+    }
+
+    @Throws(AnalyzerException::class)
+    override fun ternaryOperation(
+        insn: AbstractInsnNode,
+        value1: ConstSourceValue,
+        value2: ConstSourceValue,
+        value3: ConstSourceValue
+    ): ConstSourceValue? {
+        val basicValue = basicInterpreter.ternaryOperation(
+            insn,
+            value1.basicValue,
+            value2.basicValue,
+            value3.basicValue
+        ) ?: return null
+        return ConstSourceValue.createUnknown(basicValue)
+    }
+
+    @Throws(AnalyzerException::class)
+    override fun naryOperation(
+        insn: AbstractInsnNode,
+        values: List<ConstSourceValue>
+    ): ConstSourceValue? {
+        val args = values.map { it.basicValue }.toList()
+        val basicValue = basicInterpreter.naryOperation(insn, args) ?: return null
+        return ConstSourceValue.createUnknown(basicValue)
+    }
+
+    @Throws(AnalyzerException::class)
+    override fun returnOperation(insn: AbstractInsnNode, value: ConstSourceValue, expected: ConstSourceValue) {
+        basicInterpreter.returnOperation(insn, value.basicValue, expected.basicValue)
+    }
+
+    override fun merge(value1: ConstSourceValue, value2: ConstSourceValue): ConstSourceValue {
+        val basicValue = basicInterpreter.merge(value1.basicValue, value2.basicValue)
+        return if (value1.isSingleSourceConstant && value1 == value2) {
+            value1
+        } else {
+            ConstSourceValue.createUnknown(basicValue)
+        }
+    }
+}