diff --git a/lib/nostrAuth.ts b/lib/nostrAuth.ts
index 4e67c11..14f6608 100644
--- a/lib/nostrAuth.ts
+++ b/lib/nostrAuth.ts
@@ -26,7 +26,7 @@ export class NostrAuthService {
   subscribe(callback: (state: NostrConnectState) => void): () => void {
     this.listeners.add(callback)
     callback(this.state)
-    return () => {
+    return (): void => {
       this.listeners.delete(callback)
     }
   }
@@ -182,7 +182,7 @@ export class NostrAuthService {
   }
 
   private setupMessageListener(): void {
-    window.addEventListener('storage', (e) => {
+    window.addEventListener('storage', (e: StorageEvent): void => {
       if (e.key === 'nostr_auth_state') {
         this.loadStateFromStorage()
       }
diff --git a/lib/nostrPrivateMessages.ts b/lib/nostrPrivateMessages.ts
index c28e59e..519f0bb 100644
--- a/lib/nostrPrivateMessages.ts
+++ b/lib/nostrPrivateMessages.ts
@@ -42,7 +42,7 @@ export function getPrivateContent(
     throw new Error('Private key not set or pool not initialized')
   }
 
-  return new Promise((resolve) => {
+  return new Promise<string | null>((resolve) => {
     let resolved = false
     const relayUrl = getPrimaryRelaySync()
     const { createSubscription } = require('@/types/nostr-tools-extended')
@@ -57,7 +57,7 @@ export function getPrivateContent(
       resolve(result)
     }
 
-    sub.on('event', (event: Event) => {
+    sub.on('event', (event: Event): void => {
       void decryptContent(privateKey, event)
         .then((content) => {
           if (content) {
@@ -119,7 +119,7 @@ export async function getDecryptionKey(
     throw new Error('Private key not set or pool not initialized')
   }
 
-  return new Promise((resolve) => {
+  return new Promise<DecryptionKey | null>((resolve) => {
     let resolved = false
     const relayUrl = getPrimaryRelaySync()
     const { createSubscription } = require('@/types/nostr-tools-extended')
diff --git a/lib/nostrZapVerification.ts b/lib/nostrZapVerification.ts
index e74a3bf..947c5dd 100644
--- a/lib/nostrZapVerification.ts
+++ b/lib/nostrZapVerification.ts
@@ -65,7 +65,7 @@ export function checkZapReceipt(
     return Promise.resolve(false)
   }
 
-  return new Promise((resolve) => {
+  return new Promise<boolean>((resolve) => {
     let resolved = false
     const relayUrl = getPrimaryRelaySync()
     const sub = createSubscription(pool, [relayUrl], createZapFilters(targetPubkey, targetEventId, userPubkey))
@@ -84,7 +84,9 @@ export function checkZapReceipt(
       handleZapReceiptEvent(event, targetEventId, targetPubkey, userPubkey, amount, finalize, resolvedRef)
     })
 
-    const end = () => finalize(false)
+    const end = (): void => {
+      finalize(false)
+    }
     sub.on('eose', end)
     setTimeout(end, 3000)
   })
diff --git a/lib/platformSync.ts b/lib/platformSync.ts
index e339dc3..49a5a1d 100644
--- a/lib/platformSync.ts
+++ b/lib/platformSync.ts
@@ -213,4 +213,3 @@ class PlatformSyncService {
 }
 
 export const platformSyncService = new PlatformSyncService()
-