Cache grandfathered emails in memory at startup

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

server/src/index.js

@@ -135,6 +135,7 @@ function start() {
   setInterval(runCleanup, CLEANUP_INTERVAL_MS);
 
   // Start listening
+  storage.loadGrandfatheredEmails();
   const grandfathered = storage.readGrandfatheredEmails();
   console.log(`Loaded ${grandfathered.size} grandfathered emails`);
 

server/src/storage/index.js

@@ -28,7 +28,9 @@ function ensureDirectories() {
 // Initialize on load
 ensureDirectories();
 
-// --- Grandfathered Emails (file-backed, no in-memory cache) ---
+// --- Grandfathered Emails (loaded once at startup) ---
+
+let grandfatheredSet = null;
 
 function readGrandfatheredEmails() {
   try {
@@ -43,8 +45,14 @@ function readGrandfatheredEmails() {
   return new Set();
 }
 
+function loadGrandfatheredEmails() {
+  grandfatheredSet = readGrandfatheredEmails();
+  return grandfatheredSet;
+}
+
 function isGrandfathered(email) {
-  return readGrandfatheredEmails().has(email.toLowerCase());
+  if (!grandfatheredSet) loadGrandfatheredEmails();
+  return grandfatheredSet.has(email.toLowerCase());
 }
 
 // --- Subscription Cache (email -> premium status, file-backed, no in-memory cache) ---
@@ -277,6 +285,7 @@ function pruneExpiredRateLimits() {
 module.exports = {
   // Grandfathered
   readGrandfatheredEmails,
+  loadGrandfatheredEmails,
   isGrandfathered,
 
   // Auth requests

server/tests/license.test.js

@@ -96,7 +96,7 @@ describe('License Routes', () => {
       // Set up grandfathered file
       const grandfatheredFile = path.join(testDataDir, config.GRANDFATHERED_FILE);
       fs.writeFileSync(grandfatheredFile, 'donor@example.com\n');
-
+      storage.loadGrandfatheredEmails();
 
       const token = generateSessionToken('donor@example.com');
 
@@ -116,7 +116,7 @@ describe('License Routes', () => {
     it('should handle grandfathered check case-insensitively', async () => {
       const grandfatheredFile = path.join(testDataDir, config.GRANDFATHERED_FILE);
       fs.writeFileSync(grandfatheredFile, 'Donor@Example.com\n');
-
+      storage.loadGrandfatheredEmails();
 
       // Token with lowercase email
       const token = generateSessionToken('donor@example.com');

server/tests/storage.test.js

@@ -134,6 +134,7 @@ describe('Storage', () => {
     it('should read grandfathered emails from file', () => {
       const grandfatheredFile = path.join(testDataDir, config.GRANDFATHERED_FILE);
       fs.writeFileSync(grandfatheredFile, 'donor1@example.com\nDonor2@Example.com\n');
+      storage.loadGrandfatheredEmails();
 
       assert.strictEqual(storage.isGrandfathered('donor1@example.com'), true);
       assert.strictEqual(storage.isGrandfathered('DONOR1@EXAMPLE.COM'), true);
@@ -142,6 +143,7 @@ describe('Storage', () => {
     });
 
     it('should handle missing grandfathered file gracefully', () => {
+      storage.loadGrandfatheredEmails();
       // File doesn't exist, should not throw
       assert.strictEqual(storage.isGrandfathered('anyone@example.com'), false);
     });