Move utility functions to a separate file

src/base64.test.ts

@@ -1,32 +1,9 @@
 import { Bytes } from 'o1js';
 import { base64Decode } from './base64';
-import { randomBytes as generateRandomBytes } from 'node:crypto';
-
-function generateRandomBase64String(maxLength: number): string {
-  // Generate a random length between 1 and maxLength
-  const length = Math.floor(Math.random() * maxLength) + 1;
-
-  // Generate random bytes or buffer
-  const randomBytes = generateRandomBytes(length);
-
-  // Convert to Base64
-  const base64String = randomBytes.toString('base64');
-
-  return base64String;
-}
-
-function calculateB64DecodedBytesLength(base64String: string): number {
-  // Calculate the length of the base64-encoded string
-  const base64Length = base64String.length;
-
-  // Count the number of padding characters '=' in the base64 string
-  const padding = (base64String.match(/=/g) || []).length;
-
-  // Calculate the length of the decoded bytes
-  const byteLength = (base64Length * 3) / 4 - padding;
-
-  return byteLength;
-}
+import {
+  calculateB64DecodedBytesLength,
+  generateRandomBase64String,
+} from './utils';
 
 describe('Base64 Decode Tests', () => {
   function testBase64Decode(base64String: string) {

src/utils.ts

@@ -0,0 +1,29 @@
+import { randomBytes as generateRandomBytes } from 'node:crypto';
+
+export { generateRandomBase64String, calculateB64DecodedBytesLength };
+
+function generateRandomBase64String(maxLength: number): string {
+  // Generate a random length between 1 and maxLength
+  const length = Math.floor(Math.random() * maxLength) + 1;
+
+  // Generate random bytes or buffer
+  const randomBytes = generateRandomBytes(length);
+
+  // Convert to Base64
+  const base64String = randomBytes.toString('base64');
+
+  return base64String;
+}
+
+function calculateB64DecodedBytesLength(base64String: string): number {
+  // Calculate the length of the base64-encoded string
+  const base64Length = base64String.length;
+
+  // Count the number of padding characters '=' in the base64 string
+  const padding = (base64String.match(/=/g) || []).length;
+
+  // Calculate the length of the decoded bytes
+  const byteLength = (base64Length * 3) / 4 - padding;
+
+  return byteLength;
+}