diff --git a/src/utils.ts b/src/utils.ts
index 2fb30e5..3c1ef2a 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -1,6 +1,21 @@
 // Server-specific utility functions
 export const EMPTY32BYTES = String('').padStart(64, '0');
 
+export function splitPrivateData(data: Record<string, any>, privateFields: string[]): { privateData: Record<string, any>, publicData: Record<string, any> } {
+  const privateData: Record<string, any> = {};
+  const publicData: Record<string, any> = {};
+
+  for (const [key, value] of Object.entries(data)) {
+    if (privateFields.includes(key)) {
+      privateData[key] = value;
+    } else {
+      publicData[key] = value;
+    }
+  }
+
+  return { privateData, publicData };
+}
+
 export function isValid32ByteHex(value: string): boolean {
   // Check if the value is a valid 32-byte hex string (64 characters)
   const hexRegex = /^[0-9a-fA-F]{64}$/;