diff --git a/asm/src/main/java/dev/openrs2/asm/InsnListUtils.java b/asm/src/main/java/dev/openrs2/asm/InsnListUtils.java
index dafa458f..379c2251 100644
--- a/asm/src/main/java/dev/openrs2/asm/InsnListUtils.java
+++ b/asm/src/main/java/dev/openrs2/asm/InsnListUtils.java
@@ -32,7 +32,7 @@ public final class InsnListUtils {
 			}
 
 			insn = insn.getPrevious();
-		} while (insn != null && insn.getType() != AbstractInsnNode.LABEL && InsnNodeUtils.isPure(insn));
+		} while (insn != null && insn.getType() != AbstractInsnNode.LABEL && InsnNodeUtilsKt.getPure(insn));
 
 		return false;
 	}
diff --git a/asm/src/main/java/dev/openrs2/asm/InsnNodeUtils.java b/asm/src/main/java/dev/openrs2/asm/InsnNodeUtils.java
deleted file mode 100644
index ae6fefe7..00000000
--- a/asm/src/main/java/dev/openrs2/asm/InsnNodeUtils.java
+++ /dev/null
@@ -1,335 +0,0 @@
-package dev.openrs2.asm;
-
-import java.io.IOException;
-import java.io.PrintWriter;
-import java.io.StringWriter;
-import java.io.UncheckedIOException;
-
-import org.objectweb.asm.Opcodes;
-import org.objectweb.asm.tree.AbstractInsnNode;
-import org.objectweb.asm.tree.InsnNode;
-import org.objectweb.asm.tree.IntInsnNode;
-import org.objectweb.asm.tree.LdcInsnNode;
-import org.objectweb.asm.util.Textifier;
-import org.objectweb.asm.util.TraceMethodVisitor;
-
-public final class InsnNodeUtils {
-	public static AbstractInsnNode nextReal(AbstractInsnNode insn) {
-		while ((insn = insn.getNext()) != null && insn.getOpcode() == -1) {
-			/* empty */
-		}
-		return insn;
-	}
-
-	public static AbstractInsnNode previousReal(AbstractInsnNode insn) {
-		while ((insn = insn.getPrevious()) != null && insn.getOpcode() == -1) {
-			/* empty */
-		}
-		return insn;
-	}
-
-	public static AbstractInsnNode nextVirtual(AbstractInsnNode insn) {
-		while ((insn = insn.getNext()) != null && insn.getOpcode() != -1) {
-			/* empty */
-		}
-		return insn;
-	}
-
-	public static AbstractInsnNode previousVirtual(AbstractInsnNode insn) {
-		while ((insn = insn.getPrevious()) != null && insn.getOpcode() != -1) {
-			/* empty */
-		}
-		return insn;
-	}
-
-	public static boolean isIntConstant(AbstractInsnNode insn) {
-		switch (insn.getOpcode()) {
-		case Opcodes.ICONST_M1:
-		case Opcodes.ICONST_0:
-		case Opcodes.ICONST_1:
-		case Opcodes.ICONST_2:
-		case Opcodes.ICONST_3:
-		case Opcodes.ICONST_4:
-		case Opcodes.ICONST_5:
-		case Opcodes.BIPUSH:
-		case Opcodes.SIPUSH:
-			return true;
-		case Opcodes.LDC:
-			var ldc = (LdcInsnNode) insn;
-			return ldc.cst instanceof Integer;
-		}
-
-		return false;
-	}
-
-	public static int getIntConstant(AbstractInsnNode insn) {
-		switch (insn.getOpcode()) {
-		case Opcodes.ICONST_M1:
-			return -1;
-		case Opcodes.ICONST_0:
-			return 0;
-		case Opcodes.ICONST_1:
-			return 1;
-		case Opcodes.ICONST_2:
-			return 2;
-		case Opcodes.ICONST_3:
-			return 3;
-		case Opcodes.ICONST_4:
-			return 4;
-		case Opcodes.ICONST_5:
-			return 5;
-		case Opcodes.BIPUSH:
-		case Opcodes.SIPUSH:
-			var intInsn = (IntInsnNode) insn;
-			return intInsn.operand;
-		case Opcodes.LDC:
-			var ldc = (LdcInsnNode) insn;
-			if (ldc.cst instanceof Integer) {
-				return (Integer) ldc.cst;
-			}
-		}
-
-		throw new IllegalArgumentException();
-	}
-
-	public static AbstractInsnNode createIntConstant(int value) {
-		switch (value) {
-		case -1:
-			return new InsnNode(Opcodes.ICONST_M1);
-		case 0:
-			return new InsnNode(Opcodes.ICONST_0);
-		case 1:
-			return new InsnNode(Opcodes.ICONST_1);
-		case 2:
-			return new InsnNode(Opcodes.ICONST_2);
-		case 3:
-			return new InsnNode(Opcodes.ICONST_3);
-		case 4:
-			return new InsnNode(Opcodes.ICONST_4);
-		case 5:
-			return new InsnNode(Opcodes.ICONST_5);
-		}
-
-		if (value >= Byte.MIN_VALUE && value <= Byte.MAX_VALUE) {
-			return new IntInsnNode(Opcodes.BIPUSH, value);
-		} else if (value >= Short.MIN_VALUE && value <= Short.MAX_VALUE) {
-			return new IntInsnNode(Opcodes.SIPUSH, value);
-		} else {
-			return new LdcInsnNode(value);
-		}
-	}
-
-	public static boolean isPure(AbstractInsnNode insn) {
-		var opcode = insn.getOpcode();
-		switch (opcode) {
-		case -1:
-		case Opcodes.NOP:
-		case Opcodes.ACONST_NULL:
-		case Opcodes.ICONST_M1:
-		case Opcodes.ICONST_0:
-		case Opcodes.ICONST_1:
-		case Opcodes.ICONST_2:
-		case Opcodes.ICONST_3:
-		case Opcodes.ICONST_4:
-		case Opcodes.ICONST_5:
-		case Opcodes.LCONST_0:
-		case Opcodes.LCONST_1:
-		case Opcodes.FCONST_0:
-		case Opcodes.FCONST_1:
-		case Opcodes.FCONST_2:
-		case Opcodes.DCONST_0:
-		case Opcodes.DCONST_1:
-		case Opcodes.BIPUSH:
-		case Opcodes.SIPUSH:
-		case Opcodes.LDC:
-		case Opcodes.ILOAD:
-		case Opcodes.LLOAD:
-		case Opcodes.FLOAD:
-		case Opcodes.DLOAD:
-		case Opcodes.ALOAD:
-			return true;
-		case Opcodes.IALOAD:
-		case Opcodes.LALOAD:
-		case Opcodes.FALOAD:
-		case Opcodes.DALOAD:
-		case Opcodes.AALOAD:
-		case Opcodes.BALOAD:
-		case Opcodes.CALOAD:
-		case Opcodes.SALOAD:
-			/* might throw NPE or index out of bounds exception */
-		case Opcodes.ISTORE:
-		case Opcodes.LSTORE:
-		case Opcodes.FSTORE:
-		case Opcodes.DSTORE:
-		case Opcodes.ASTORE:
-		case Opcodes.IASTORE:
-		case Opcodes.LASTORE:
-		case Opcodes.FASTORE:
-		case Opcodes.DASTORE:
-		case Opcodes.AASTORE:
-		case Opcodes.BASTORE:
-		case Opcodes.CASTORE:
-		case Opcodes.SASTORE:
-			return false;
-		case Opcodes.POP:
-		case Opcodes.POP2:
-		case Opcodes.DUP:
-		case Opcodes.DUP_X1:
-		case Opcodes.DUP_X2:
-		case Opcodes.DUP2:
-		case Opcodes.DUP2_X1:
-		case Opcodes.DUP2_X2:
-		case Opcodes.SWAP:
-		case Opcodes.IADD:
-		case Opcodes.LADD:
-		case Opcodes.FADD:
-		case Opcodes.DADD:
-		case Opcodes.ISUB:
-		case Opcodes.LSUB:
-		case Opcodes.FSUB:
-		case Opcodes.DSUB:
-		case Opcodes.IMUL:
-		case Opcodes.LMUL:
-		case Opcodes.FMUL:
-		case Opcodes.DMUL:
-		case Opcodes.IDIV:
-		case Opcodes.LDIV:
-		case Opcodes.FDIV:
-		case Opcodes.DDIV:
-		case Opcodes.IREM:
-		case Opcodes.LREM:
-		case Opcodes.FREM:
-		case Opcodes.DREM:
-			/*
-			 * XXX(gpe): strictly speaking the *DIV and *REM instructions have
-			 * side effects (unless we can prove that the second argument is
-			 * non-zero). However, treating them as having side effects reduces
-			 * the number of dummy variables we can remove, so we pretend they
-			 * don't have any side effects.
-			 *
-			 * This doesn't seem to cause any problems with the client, as it
-			 * doesn't deliberately try to trigger divide-by-zero exceptions.
-			 */
-		case Opcodes.INEG:
-		case Opcodes.LNEG:
-		case Opcodes.FNEG:
-		case Opcodes.DNEG:
-		case Opcodes.ISHL:
-		case Opcodes.LSHL:
-		case Opcodes.ISHR:
-		case Opcodes.LSHR:
-		case Opcodes.IUSHR:
-		case Opcodes.LUSHR:
-		case Opcodes.IAND:
-		case Opcodes.LAND:
-		case Opcodes.IOR:
-		case Opcodes.LOR:
-		case Opcodes.IXOR:
-		case Opcodes.LXOR:
-			return true;
-		case Opcodes.IINC:
-			return false;
-		case Opcodes.I2L:
-		case Opcodes.I2F:
-		case Opcodes.I2D:
-		case Opcodes.L2I:
-		case Opcodes.L2F:
-		case Opcodes.L2D:
-		case Opcodes.F2I:
-		case Opcodes.F2L:
-		case Opcodes.F2D:
-		case Opcodes.D2I:
-		case Opcodes.D2L:
-		case Opcodes.D2F:
-		case Opcodes.I2B:
-		case Opcodes.I2C:
-		case Opcodes.I2S:
-		case Opcodes.LCMP:
-		case Opcodes.FCMPL:
-		case Opcodes.FCMPG:
-		case Opcodes.DCMPL:
-		case Opcodes.DCMPG:
-			return true;
-		case Opcodes.IFEQ:
-		case Opcodes.IFNE:
-		case Opcodes.IFLT:
-		case Opcodes.IFGE:
-		case Opcodes.IFGT:
-		case Opcodes.IFLE:
-		case Opcodes.IF_ICMPEQ:
-		case Opcodes.IF_ICMPNE:
-		case Opcodes.IF_ICMPLT:
-		case Opcodes.IF_ICMPGE:
-		case Opcodes.IF_ICMPGT:
-		case Opcodes.IF_ICMPLE:
-		case Opcodes.IF_ACMPEQ:
-		case Opcodes.IF_ACMPNE:
-		case Opcodes.GOTO:
-		case Opcodes.JSR:
-		case Opcodes.RET:
-		case Opcodes.TABLESWITCH:
-		case Opcodes.LOOKUPSWITCH:
-		case Opcodes.IRETURN:
-		case Opcodes.LRETURN:
-		case Opcodes.FRETURN:
-		case Opcodes.DRETURN:
-		case Opcodes.ARETURN:
-		case Opcodes.RETURN:
-			return false;
-		case Opcodes.GETSTATIC:
-			return true;
-		case Opcodes.PUTSTATIC:
-		case Opcodes.GETFIELD:
-			/* might throw NPE */
-		case Opcodes.PUTFIELD:
-			return false;
-		case Opcodes.INVOKEVIRTUAL:
-		case Opcodes.INVOKESPECIAL:
-		case Opcodes.INVOKESTATIC:
-		case Opcodes.INVOKEINTERFACE:
-		case Opcodes.INVOKEDYNAMIC:
-			return false;
-		case Opcodes.NEW:
-			return true;
-		case Opcodes.NEWARRAY:
-		case Opcodes.ANEWARRAY:
-			/* arrays might be created with negative size */
-		case Opcodes.ARRAYLENGTH:
-			/* might throw NPE */
-		case Opcodes.ATHROW:
-		case Opcodes.CHECKCAST:
-			return false;
-		case Opcodes.INSTANCEOF:
-			return true;
-		case Opcodes.MONITORENTER:
-		case Opcodes.MONITOREXIT:
-		case Opcodes.MULTIANEWARRAY:
-		case Opcodes.IFNULL:
-		case Opcodes.IFNONNULL:
-			return false;
-		}
-
-		throw new IllegalArgumentException();
-	}
-
-	public static String toString(AbstractInsnNode insn) {
-		var printer = new Textifier();
-
-		var visitor = new TraceMethodVisitor(printer);
-		insn.accept(visitor);
-
-		try (
-			var stringWriter = new StringWriter();
-			var printWriter = new PrintWriter(stringWriter)
-		) {
-			printer.print(printWriter);
-			return stringWriter.toString().trim();
-		} catch (IOException ex) {
-			throw new UncheckedIOException(ex);
-		}
-	}
-
-	private InsnNodeUtils() {
-		/* empty */
-	}
-}
diff --git a/asm/src/main/java/dev/openrs2/asm/InsnNodeUtils.kt b/asm/src/main/java/dev/openrs2/asm/InsnNodeUtils.kt
new file mode 100644
index 00000000..1d712f42
--- /dev/null
+++ b/asm/src/main/java/dev/openrs2/asm/InsnNodeUtils.kt
@@ -0,0 +1,288 @@
+package dev.openrs2.asm
+
+import org.objectweb.asm.Opcodes
+import org.objectweb.asm.tree.AbstractInsnNode
+import org.objectweb.asm.tree.InsnNode
+import org.objectweb.asm.tree.IntInsnNode
+import org.objectweb.asm.tree.LdcInsnNode
+import org.objectweb.asm.util.Textifier
+import org.objectweb.asm.util.TraceMethodVisitor
+import java.io.IOException
+import java.io.PrintWriter
+import java.io.StringWriter
+import java.io.UncheckedIOException
+
+private val PURE_OPCODES = setOf(
+    -1,
+    Opcodes.NOP,
+    Opcodes.ACONST_NULL,
+    Opcodes.ICONST_M1,
+    Opcodes.ICONST_0,
+    Opcodes.ICONST_1,
+    Opcodes.ICONST_2,
+    Opcodes.ICONST_3,
+    Opcodes.ICONST_4,
+    Opcodes.ICONST_5,
+    Opcodes.LCONST_0,
+    Opcodes.LCONST_1,
+    Opcodes.FCONST_0,
+    Opcodes.FCONST_1,
+    Opcodes.FCONST_2,
+    Opcodes.DCONST_0,
+    Opcodes.DCONST_1,
+    Opcodes.BIPUSH,
+    Opcodes.SIPUSH,
+    Opcodes.LDC,
+    Opcodes.ILOAD,
+    Opcodes.LLOAD,
+    Opcodes.FLOAD,
+    Opcodes.DLOAD,
+    Opcodes.ALOAD,
+    Opcodes.POP,
+    Opcodes.POP2,
+    Opcodes.DUP,
+    Opcodes.DUP_X1,
+    Opcodes.DUP_X2,
+    Opcodes.DUP2,
+    Opcodes.DUP2_X1,
+    Opcodes.DUP2_X2,
+    Opcodes.SWAP,
+    Opcodes.IADD,
+    Opcodes.LADD,
+    Opcodes.FADD,
+    Opcodes.DADD,
+    Opcodes.ISUB,
+    Opcodes.LSUB,
+    Opcodes.FSUB,
+    Opcodes.DSUB,
+    Opcodes.IMUL,
+    Opcodes.LMUL,
+    Opcodes.FMUL,
+    Opcodes.DMUL,
+    /*
+     * XXX(gpe): strictly speaking the *DEV and *REM instructions have side
+     * effects (unless we can prove that the second argument is non-zero).
+     * However, treating them as having side effects reduces the number of
+     * dummy variables we can remove, so we pretend they don't have any side
+     * effects.
+     *
+     * This doesn't seem to cause any problems with the client, as it doesn't
+     * deliberately try to trigger divide-by-zero exceptions.
+     */
+    Opcodes.IDIV,
+    Opcodes.LDIV,
+    Opcodes.FDIV,
+    Opcodes.DDIV,
+    Opcodes.IREM,
+    Opcodes.LREM,
+    Opcodes.FREM,
+    Opcodes.DREM,
+    Opcodes.INEG,
+    Opcodes.LNEG,
+    Opcodes.FNEG,
+    Opcodes.DNEG,
+    Opcodes.ISHL,
+    Opcodes.LSHL,
+    Opcodes.ISHR,
+    Opcodes.LSHR,
+    Opcodes.IUSHR,
+    Opcodes.LUSHR,
+    Opcodes.IAND,
+    Opcodes.LAND,
+    Opcodes.IOR,
+    Opcodes.LOR,
+    Opcodes.IXOR,
+    Opcodes.LXOR,
+    Opcodes.I2L,
+    Opcodes.I2F,
+    Opcodes.I2D,
+    Opcodes.L2I,
+    Opcodes.L2F,
+    Opcodes.L2D,
+    Opcodes.F2I,
+    Opcodes.F2L,
+    Opcodes.F2D,
+    Opcodes.D2I,
+    Opcodes.D2L,
+    Opcodes.D2F,
+    Opcodes.I2B,
+    Opcodes.I2C,
+    Opcodes.I2S,
+    Opcodes.LCMP,
+    Opcodes.FCMPL,
+    Opcodes.FCMPG,
+    Opcodes.DCMPL,
+    Opcodes.DCMPG,
+    Opcodes.GETSTATIC,
+    Opcodes.NEW,
+    Opcodes.INSTANCEOF
+)
+
+private val IMPURE_OPCODES = setOf(
+    Opcodes.IALOAD,
+    Opcodes.LALOAD,
+    Opcodes.FALOAD,
+    Opcodes.DALOAD,
+    Opcodes.AALOAD,
+    Opcodes.BALOAD,
+    Opcodes.CALOAD,
+    Opcodes.SALOAD,
+    Opcodes.ISTORE,
+    Opcodes.LSTORE,
+    Opcodes.FSTORE,
+    Opcodes.DSTORE,
+    Opcodes.ASTORE,
+    Opcodes.IASTORE,
+    Opcodes.LASTORE,
+    Opcodes.FASTORE,
+    Opcodes.DASTORE,
+    Opcodes.AASTORE,
+    Opcodes.BASTORE,
+    Opcodes.CASTORE,
+    Opcodes.SASTORE,
+    Opcodes.IINC,
+    Opcodes.IFEQ,
+    Opcodes.IFNE,
+    Opcodes.IFLT,
+    Opcodes.IFGE,
+    Opcodes.IFGT,
+    Opcodes.IFLE,
+    Opcodes.IF_ICMPEQ,
+    Opcodes.IF_ICMPNE,
+    Opcodes.IF_ICMPLT,
+    Opcodes.IF_ICMPGE,
+    Opcodes.IF_ICMPGT,
+    Opcodes.IF_ICMPLE,
+    Opcodes.IF_ACMPEQ,
+    Opcodes.IF_ACMPNE,
+    Opcodes.GOTO,
+    Opcodes.JSR,
+    Opcodes.RET,
+    Opcodes.TABLESWITCH,
+    Opcodes.LOOKUPSWITCH,
+    Opcodes.IRETURN,
+    Opcodes.LRETURN,
+    Opcodes.FRETURN,
+    Opcodes.DRETURN,
+    Opcodes.ARETURN,
+    Opcodes.RETURN,
+    Opcodes.PUTSTATIC,
+    Opcodes.GETFIELD,
+    Opcodes.PUTFIELD,
+    Opcodes.INVOKEVIRTUAL,
+    Opcodes.INVOKESPECIAL,
+    Opcodes.INVOKESTATIC,
+    Opcodes.INVOKEINTERFACE,
+    Opcodes.INVOKEDYNAMIC,
+    Opcodes.NEWARRAY,
+    Opcodes.ANEWARRAY,
+    Opcodes.ARRAYLENGTH,
+    Opcodes.ATHROW,
+    Opcodes.CHECKCAST,
+    Opcodes.MONITORENTER,
+    Opcodes.MONITOREXIT,
+    Opcodes.MULTIANEWARRAY,
+    Opcodes.IFNULL,
+    Opcodes.IFNONNULL
+)
+
+val AbstractInsnNode.nextReal: AbstractInsnNode?
+    get() {
+        var insn = next
+        while (insn != null && insn.opcode == -1) {
+            insn = insn.next
+        }
+        return insn
+    }
+
+val AbstractInsnNode.previousReal: AbstractInsnNode?
+    get() {
+        var insn = previous
+        while (insn != null && insn.opcode == -1) {
+            insn = insn.previous
+        }
+        return insn
+    }
+
+val AbstractInsnNode.nextVirtual: AbstractInsnNode?
+    get() {
+        var insn = next
+        while (insn != null && insn.opcode != -1) {
+            insn = insn.next
+        }
+        return insn
+    }
+
+val AbstractInsnNode.previousVirtual: AbstractInsnNode?
+    get() {
+        var insn = previous
+        while (insn != null && insn.opcode != -1) {
+            insn = insn.previous
+        }
+        return insn
+    }
+
+val AbstractInsnNode.intConstant: Int?
+    get() = when (this) {
+        is IntInsnNode -> {
+            if (opcode == Opcodes.BIPUSH || opcode == Opcodes.SIPUSH) {
+                operand
+            } else {
+                null
+            }
+        }
+        is LdcInsnNode -> {
+            val cst = cst
+            if (cst is Int) {
+                cst
+            } else {
+                null
+            }
+        }
+        else -> when (opcode) {
+            Opcodes.ICONST_M1 -> -1
+            Opcodes.ICONST_0 -> 0
+            Opcodes.ICONST_1 -> 1
+            Opcodes.ICONST_2 -> 2
+            Opcodes.ICONST_3 -> 3
+            Opcodes.ICONST_4 -> 4
+            Opcodes.ICONST_5 -> 5
+            else -> null
+        }
+    }
+
+val AbstractInsnNode.pure: Boolean
+    get() = when {
+        PURE_OPCODES.contains(opcode) -> true
+        IMPURE_OPCODES.contains(opcode) -> false
+        else -> throw IllegalArgumentException()
+    }
+
+fun createIntConstant(value: Int): AbstractInsnNode = when (value) {
+    -1 -> InsnNode(Opcodes.ICONST_M1)
+    0 -> InsnNode(Opcodes.ICONST_0)
+    1 -> InsnNode(Opcodes.ICONST_1)
+    2 -> InsnNode(Opcodes.ICONST_2)
+    3 -> InsnNode(Opcodes.ICONST_3)
+    4 -> InsnNode(Opcodes.ICONST_4)
+    5 -> InsnNode(Opcodes.ICONST_5)
+    in Byte.MIN_VALUE..Byte.MAX_VALUE -> IntInsnNode(Opcodes.BIPUSH, value)
+    in Short.MIN_VALUE..Short.MAX_VALUE -> IntInsnNode(Opcodes.SIPUSH, value)
+    else -> LdcInsnNode(value)
+}
+
+fun AbstractInsnNode.toPrettyString(): String {
+    val printer = Textifier()
+    val visitor = TraceMethodVisitor(printer)
+    accept(visitor)
+    try {
+        StringWriter().use { stringWriter ->
+            PrintWriter(stringWriter).use { printWriter ->
+                printer.print(printWriter)
+                return stringWriter.toString().trim { it <= ' ' }
+            }
+        }
+    } catch (ex: IOException) {
+        throw UncheckedIOException(ex)
+    }
+}
diff --git a/bundler/src/main/java/dev/openrs2/bundler/transform/BufferSizeTransformer.java b/bundler/src/main/java/dev/openrs2/bundler/transform/BufferSizeTransformer.java
index f0f62e92..f1361a94 100644
--- a/bundler/src/main/java/dev/openrs2/bundler/transform/BufferSizeTransformer.java
+++ b/bundler/src/main/java/dev/openrs2/bundler/transform/BufferSizeTransformer.java
@@ -3,7 +3,7 @@ package dev.openrs2.bundler.transform;
 import java.util.Optional;
 
 import dev.openrs2.asm.InsnMatcher;
-import dev.openrs2.asm.InsnNodeUtils;
+import dev.openrs2.asm.InsnNodeUtilsKt;
 import dev.openrs2.asm.MemberRef;
 import dev.openrs2.asm.MethodNodeUtilsKt;
 import dev.openrs2.asm.classpath.ClassPath;
@@ -79,7 +79,7 @@ public final class BufferSizeTransformer extends Transformer {
 				return;
 			}
 
-			method.instructions.set(match.get(2), InsnNodeUtils.createIntConstant(65535));
+			method.instructions.set(match.get(2), InsnNodeUtilsKt.createIntConstant(65535));
 			buffersResized++;
 		});
 
diff --git a/deob/src/main/java/dev/openrs2/deob/analysis/ConstSourceInterpreter.java b/deob/src/main/java/dev/openrs2/deob/analysis/ConstSourceInterpreter.java
index 77514fd0..72750abf 100644
--- a/deob/src/main/java/dev/openrs2/deob/analysis/ConstSourceInterpreter.java
+++ b/deob/src/main/java/dev/openrs2/deob/analysis/ConstSourceInterpreter.java
@@ -3,7 +3,7 @@ package dev.openrs2.deob.analysis;
 import java.util.List;
 
 import com.google.common.collect.ImmutableList;
-import dev.openrs2.asm.InsnNodeUtils;
+import dev.openrs2.asm.InsnNodeUtilsKt;
 import org.objectweb.asm.Opcodes;
 import org.objectweb.asm.Type;
 import org.objectweb.asm.tree.AbstractInsnNode;
@@ -36,7 +36,7 @@ public final class ConstSourceInterpreter extends Interpreter<ConstSourceValue>
 			return null;
 		}
 
-		if (InsnNodeUtils.isIntConstant(insn)) {
+		if (InsnNodeUtilsKt.getIntConstant(insn) != null) {
 			return ConstSourceValue.createSingleSourceConstant(basicValue, insn);
 		}
 
diff --git a/deob/src/main/java/dev/openrs2/deob/analysis/IntInterpreter.java b/deob/src/main/java/dev/openrs2/deob/analysis/IntInterpreter.java
index 19202791..ec2f28d1 100644
--- a/deob/src/main/java/dev/openrs2/deob/analysis/IntInterpreter.java
+++ b/deob/src/main/java/dev/openrs2/deob/analysis/IntInterpreter.java
@@ -5,7 +5,7 @@ import java.util.List;
 import com.google.common.collect.ImmutableList;
 import com.google.common.collect.ImmutableSet;
 import com.google.common.collect.Sets;
-import dev.openrs2.asm.InsnNodeUtils;
+import dev.openrs2.asm.InsnNodeUtilsKt;
 import org.objectweb.asm.Opcodes;
 import org.objectweb.asm.Type;
 import org.objectweb.asm.tree.AbstractInsnNode;
@@ -70,8 +70,9 @@ public final class IntInterpreter extends Interpreter<IntValue> {
 			return null;
 		}
 
-		if (InsnNodeUtils.isIntConstant(insn)) {
-			return IntValue.newConstant(basicValue, InsnNodeUtils.getIntConstant(insn));
+		var v = InsnNodeUtilsKt.getIntConstant(insn);
+		if (v != null) {
+			return IntValue.newConstant(basicValue, v);
 		}
 
 		return IntValue.newUnknown(basicValue);
diff --git a/deob/src/main/java/dev/openrs2/deob/transform/BitShiftTransformer.kt b/deob/src/main/java/dev/openrs2/deob/transform/BitShiftTransformer.kt
index 90df9a74..4cc34563 100644
--- a/deob/src/main/java/dev/openrs2/deob/transform/BitShiftTransformer.kt
+++ b/deob/src/main/java/dev/openrs2/deob/transform/BitShiftTransformer.kt
@@ -2,9 +2,10 @@ package dev.openrs2.deob.transform
 
 import com.github.michaelbull.logging.InlineLogger
 import dev.openrs2.asm.InsnMatcher
-import dev.openrs2.asm.InsnNodeUtils
 import dev.openrs2.asm.classpath.ClassPath
 import dev.openrs2.asm.classpath.Library
+import dev.openrs2.asm.createIntConstant
+import dev.openrs2.asm.intConstant
 import dev.openrs2.asm.transform.Transformer
 import org.objectweb.asm.Opcodes
 import org.objectweb.asm.tree.ClassNode
@@ -25,7 +26,7 @@ class BitShiftTransformer : Transformer() {
     ): Boolean {
         CONST_SHIFT_MATCHER.match(method).forEach {
             val push = it[0]
-            val bits = InsnNodeUtils.getIntConstant(push)
+            val bits = push.intConstant!!
 
             val opcode = it[1].opcode
             val mask = if (LONG_SHIFTS.contains(opcode)) 63 else 31
@@ -33,7 +34,7 @@ class BitShiftTransformer : Transformer() {
             val simplifiedBits = bits and mask
 
             if (bits != simplifiedBits) {
-                method.instructions[push] = InsnNodeUtils.createIntConstant(simplifiedBits)
+                method.instructions[push] = createIntConstant(simplifiedBits)
                 simplified++
             }
         }
diff --git a/deob/src/main/java/dev/openrs2/deob/transform/DummyArgTransformer.java b/deob/src/main/java/dev/openrs2/deob/transform/DummyArgTransformer.java
index fc4476d5..d45932ff 100644
--- a/deob/src/main/java/dev/openrs2/deob/transform/DummyArgTransformer.java
+++ b/deob/src/main/java/dev/openrs2/deob/transform/DummyArgTransformer.java
@@ -13,7 +13,7 @@ import com.google.common.collect.ImmutableSet;
 import com.google.common.collect.Multimap;
 import dev.openrs2.asm.InsnListUtils;
 import dev.openrs2.asm.InsnMatcher;
-import dev.openrs2.asm.InsnNodeUtils;
+import dev.openrs2.asm.InsnNodeUtilsKt;
 import dev.openrs2.asm.MemberRef;
 import dev.openrs2.asm.StackMetadataKt;
 import dev.openrs2.asm.classpath.ClassPath;
@@ -280,7 +280,7 @@ public final class DummyArgTransformer extends Transformer {
 				conditionValue = null;
 				matchIndex++;
 			} else {
-				conditionValue = InsnNodeUtils.getIntConstant(match.get(matchIndex++));
+				conditionValue = InsnNodeUtilsKt.getIntConstant(match.get(matchIndex++));
 				conditionOpcode = match.get(matchIndex++).getOpcode();
 			}
 
@@ -297,8 +297,8 @@ public final class DummyArgTransformer extends Transformer {
 				var insn = match.get(matchIndex++);
 				if (insn.getOpcode() == Opcodes.ACONST_NULL) {
 					matchIndex++;
-				} else if (InsnNodeUtils.isIntConstant(insn)) {
-					constArgs[i] = InsnNodeUtils.getIntConstant(insn);
+				} else {
+					constArgs[i] = InsnNodeUtilsKt.getIntConstant(insn);
 				}
 			}
 
@@ -387,7 +387,7 @@ public final class DummyArgTransformer extends Transformer {
 				}
 				break;
 			default:
-				if (!InsnNodeUtils.isPure(insn) || InsnNodeUtils.isIntConstant(insn)) {
+				if (!InsnNodeUtilsKt.getPure(insn) || InsnNodeUtilsKt.getIntConstant(insn) != null) {
 					continue;
 				}
 
@@ -395,7 +395,7 @@ public final class DummyArgTransformer extends Transformer {
 					continue;
 				}
 
-				var nextInsn = InsnNodeUtils.nextReal(insn);
+				var nextInsn = InsnNodeUtilsKt.getNextReal(insn);
 				if (nextInsn == null) {
 					continue;
 				}
@@ -433,7 +433,7 @@ public final class DummyArgTransformer extends Transformer {
 				continue;
 			}
 
-			var replacement = InsnNodeUtils.createIntConstant(entry.getValue());
+			var replacement = InsnNodeUtilsKt.createIntConstant(entry.getValue());
 			if (InsnListUtils.replaceSimpleExpression(method.instructions, insn, replacement)) {
 				constantsInlined++;
 				changed = true;
diff --git a/deob/src/main/java/dev/openrs2/deob/transform/ExceptionTracingTransformer.kt b/deob/src/main/java/dev/openrs2/deob/transform/ExceptionTracingTransformer.kt
index 54b51a94..bb9106b0 100644
--- a/deob/src/main/java/dev/openrs2/deob/transform/ExceptionTracingTransformer.kt
+++ b/deob/src/main/java/dev/openrs2/deob/transform/ExceptionTracingTransformer.kt
@@ -2,9 +2,9 @@ package dev.openrs2.deob.transform
 
 import com.github.michaelbull.logging.InlineLogger
 import dev.openrs2.asm.InsnMatcher
-import dev.openrs2.asm.InsnNodeUtils
 import dev.openrs2.asm.classpath.ClassPath
 import dev.openrs2.asm.classpath.Library
+import dev.openrs2.asm.nextReal
 import dev.openrs2.asm.transform.Transformer
 import org.objectweb.asm.tree.ClassNode
 import org.objectweb.asm.tree.MethodNode
@@ -24,7 +24,7 @@ class ExceptionTracingTransformer : Transformer() {
     ): Boolean {
         CATCH_MATCHER.match(method).forEach { match ->
             val foundTryCatch = method.tryCatchBlocks.removeIf { tryCatch ->
-                tryCatch.type == "java/lang/RuntimeException" && InsnNodeUtils.nextReal(tryCatch.handler) === match[0]
+                tryCatch.type == "java/lang/RuntimeException" && tryCatch.handler.nextReal === match[0]
             }
 
             if (foundTryCatch) {
diff --git a/deob/src/main/java/dev/openrs2/deob/transform/ResetTransformer.java b/deob/src/main/java/dev/openrs2/deob/transform/ResetTransformer.java
index ff51a6ab..42ec424c 100644
--- a/deob/src/main/java/dev/openrs2/deob/transform/ResetTransformer.java
+++ b/deob/src/main/java/dev/openrs2/deob/transform/ResetTransformer.java
@@ -3,7 +3,7 @@ package dev.openrs2.deob.transform;
 import java.util.HashSet;
 import java.util.Set;
 
-import dev.openrs2.asm.InsnNodeUtils;
+import dev.openrs2.asm.InsnNodeUtilsKt;
 import dev.openrs2.asm.MemberRef;
 import dev.openrs2.asm.MethodNodeUtilsKt;
 import dev.openrs2.asm.classpath.ClassPath;
@@ -49,7 +49,7 @@ public final class ResetTransformer extends Transformer {
 				continue;
 			}
 
-			var nextInsn = InsnNodeUtils.nextReal(insn);
+			var nextInsn = InsnNodeUtilsKt.getNextReal(insn);
 			if (nextInsn.getOpcode() != Opcodes.INVOKEVIRTUAL) {
 				continue;
 			}