try to fix this spaghetti of a code

lib/core.js

@@ -1,4 +1,4 @@
-const crypto = require('node:crypto');
+const crypto = require('node:crypto');
 class AppError extends Error {
     constructor(code, message, status = 400) { super(message); this.code = code; this.status = status; }
 }
@@ -16,4 +16,9 @@ class KeyedQueue {
     async drain() { await Promise.all([...this.tails.values()]); }
 }
 const hash = value => crypto.createHash('sha256').update(value).digest('hex');
-module.exports = {AppError, KeyedQueue, hash};
+function canonical(value) {
+    if (Array.isArray(value)) return value.map(canonical);
+    if (value && typeof value === 'object') return Object.fromEntries(Object.keys(value).sort().map(key => [key, canonical(value[key])]));
+    return value;
+}
+module.exports = {AppError, KeyedQueue, hash, canonical};