diff --git a/lib/articleEncryption.ts b/lib/articleEncryption.ts
index 0c56ec5..5652797 100644
--- a/lib/articleEncryption.ts
+++ b/lib/articleEncryption.ts
@@ -81,7 +81,7 @@ export async function encryptArticleContent(content: string): Promise<{
   const ivBuffer = iv.buffer instanceof ArrayBuffer ? iv.buffer : new ArrayBuffer(iv.byteLength)
   const ivView = new Uint8Array(ivBuffer, 0, iv.byteLength)
   ivView.set(iv)
-  
+
   const encryptedBuffer = await crypto.subtle.encrypt(
     {
       name: 'AES-GCM',
diff --git a/lib/nostrEventParsing.ts b/lib/nostrEventParsing.ts
deleted file mode 100644
index f45feba..0000000
--- a/lib/nostrEventParsing.ts
+++ /dev/null
@@ -1,163 +0,0 @@
-import type { Event } from 'nostr-tools'
-import type { Article, KindType, MediaRef, Review, Series } from '@/types/nostr'
-import { extractTagsFromEvent } from './nostrTagSystem'
-
-/**
- * Parse article metadata from Nostr event
- * Uses new tag system: #publication, #sciencefiction|research, #id_<id>, #paywall, #payment
- */
-export function parseArticleFromEvent(event: Event): Article | null {
-  try {
-    const tags = extractTagsFromEvent(event)
-    // Check if it's a publication type
-    if (tags.type !== 'publication') {
-      return null
-    }
-    const { previewContent } = getPreviewContent(event.content, tags.preview as string | undefined)
-    return buildArticle(event, tags, previewContent)
-  } catch (e) {
-    console.error('Error parsing article:', e)
-    return null
-  }
-}
-
-export function parseSeriesFromEvent(event: Event): Series | null {
-  try {
-    const tags = extractTagsFromEvent(event)
-    // Check if it's a series type (tag is 'series' in English)
-    if (tags.type !== 'series') {
-      return null
-    }
-    if (!tags.title || !tags.description) {
-      return null
-    }
-    // Map category from new system to old system
-    const category = tags.category === 'sciencefiction' ? 'science-fiction' : tags.category === 'research' ? 'scientific-research' : 'science-fiction'
-    const series: Series = {
-      id: tags.id ?? event.id,
-      pubkey: event.pubkey,
-      title: tags.title as string,
-      description: tags.description as string,
-      preview: (tags.preview as string | undefined) ?? event.content.substring(0, 200),
-      category,
-      ...(tags.coverUrl ? { coverUrl: tags.coverUrl as string } : {}),
-    }
-    series.kindType = 'series'
-    return series
-  } catch (e) {
-    console.error('Error parsing series:', e)
-    return null
-  }
-}
-
-export function parseReviewFromEvent(event: Event): Review | null {
-  try {
-    const tags = extractTagsFromEvent(event)
-    // Check if it's a quote type (reviews are quotes, tag is 'quote' in English)
-    if (tags.type !== 'quote') {
-      return null
-    }
-    const articleId = tags.articleId as string | undefined
-    const reviewer = tags.reviewerPubkey as string | undefined
-    if (!articleId || !reviewer) {
-      return null
-    }
-    const rewardedTag = event.tags.find((tag) => tag[0] === 'rewarded' && tag[1] === 'true')
-    const rewardAmountTag = event.tags.find((tag) => tag[0] === 'reward_amount')
-
-    const review: Review = {
-      id: tags.id ?? event.id,
-      articleId,
-      authorPubkey: event.pubkey,
-      reviewerPubkey: reviewer,
-      content: event.content,
-      createdAt: event.created_at,
-      ...(tags.title ? { title: tags.title as string } : {}),
-      ...(rewardedTag ? { rewarded: true } : {}),
-      ...(rewardAmountTag ? { rewardAmount: parseInt(rewardAmountTag[1] ?? '0', 10) } : {}),
-    }
-    review.kindType = 'review'
-    return review
-  } catch (e) {
-    console.error('Error parsing review:', e)
-    return null
-  }
-}
-
-// extractTags is now replaced by extractTagsFromEvent from nostrTagSystem
-// This function is kept for backward compatibility but should be migrated
-// Currently unused - kept for potential future migration
-// @ts-expect-error - Unused function kept for backward compatibility
-function _unusedExtractTags(event: Event) {
-  const tags = extractTagsFromEvent(event)
-  const mediaTags = event.tags.filter((tag: string[]) => tag[0] === 'media')
-  const media: MediaRef[] =
-    mediaTags
-      .map((tag: string[]) => {
-        const url = tag[1]
-        const type = tag[2] === 'video' ? 'video' : 'image'
-        if (!url) {
-          return null
-        }
-        return { url, type }
-      })
-      .filter(Boolean) as MediaRef[]
-
-  // Map category from new system to old system
-  const category = tags.category === 'sciencefiction' ? 'science-fiction' : tags.category === 'research' ? 'scientific-research' : undefined
-  const isPresentation = tags.type === 'author'
-
-  return {
-    title: (tags.title as string | undefined) ?? 'Untitled',
-    preview: tags.preview as string | undefined,
-    description: tags.description as string | undefined,
-    zapAmount: (tags.zapAmount as number | undefined) ?? 800,
-    invoice: tags.invoice as string | undefined,
-    paymentHash: tags.paymentHash as string | undefined,
-    category,
-    isPresentation,
-    mainnetAddress: tags.mainnetAddress as string | undefined,
-    totalSponsoring: (tags.totalSponsoring as number | undefined) ?? 0,
-    authorPresentationId: undefined, // Not used in new system
-    seriesId: tags.seriesId as string | undefined,
-    bannerUrl: tags.bannerUrl as string | undefined,
-    coverUrl: tags.coverUrl as string | undefined,
-    media,
-    kindType: tags.type === 'author' ? 'article' : tags.type === 'series' ? 'series' : tags.type === 'publication' ? 'article' : tags.type === 'quote' ? 'review' : undefined,
-    articleId: tags.articleId as string | undefined,
-    reviewerPubkey: tags.reviewerPubkey as string | undefined,
-    author: undefined, // Not used in new system
-  }
-}
-
-function getPreviewContent(content: string, previewTag?: string) {
-  const lines = content.split('\n')
-  const previewContent = previewTag ?? lines[0] ?? content.substring(0, 200)
-  return { previewContent }
-}
-
-function buildArticle(event: Event, tags: ReturnType<typeof extractTagsFromEvent>, preview: string): Article {
-  // Map category from new system to old system
-  const category = tags.category === 'sciencefiction' ? 'science-fiction' : tags.category === 'research' ? 'scientific-research' : undefined
-  const isPresentation = tags.type === 'author'
-
-  return {
-    id: tags.id ?? event.id,
-    pubkey: event.pubkey,
-    title: (tags.title as string | undefined) ?? 'Untitled',
-    preview,
-    content: '',
-    createdAt: event.created_at,
-    zapAmount: (tags.zapAmount as number | undefined) ?? 800,
-    paid: false,
-    ...(tags.invoice ? { invoice: tags.invoice as string } : {}),
-    ...(tags.paymentHash ? { paymentHash: tags.paymentHash as string } : {}),
-    ...(category ? { category } : {}),
-    ...(isPresentation ? { isPresentation: true } : {}),
-    ...(tags.mainnetAddress ? { mainnetAddress: tags.mainnetAddress as string } : {}),
-    ...(tags.totalSponsoring ? { totalSponsoring: tags.totalSponsoring as number } : {}),
-    ...(tags.seriesId ? { seriesId: tags.seriesId as string } : {}),
-    ...(tags.bannerUrl ? { bannerUrl: tags.bannerUrl as string } : {}),
-    ...(tags.type === 'publication' ? { kindType: 'article' as KindType } : tags.type === 'author' ? { kindType: 'article' as KindType } : {}),
-  }
-}
diff --git a/lib/nostrPrivateMessages.ts b/lib/nostrPrivateMessages.ts
index c1b72ec..e9b6594 100644
--- a/lib/nostrPrivateMessages.ts
+++ b/lib/nostrPrivateMessages.ts
@@ -1,6 +1,6 @@
 import { Event, nip04 } from 'nostr-tools'
 import { SimplePool } from 'nostr-tools'
-import { decryptDecryptionKey, decryptArticleContent, type DecryptionKey } from './articleEncryption'
+import { decryptArticleContent, type DecryptionKey } from './articleEncryption'
 
 const RELAY_URL = process.env.NEXT_PUBLIC_NOSTR_RELAY_URL ?? 'wss://relay.damus.io'
 
diff --git a/lib/nostrTagSystem.ts b/lib/nostrTagSystem.ts
index eeda4a8..af432a1 100644
--- a/lib/nostrTagSystem.ts
+++ b/lib/nostrTagSystem.ts
@@ -143,11 +143,24 @@ export function buildTags(tags: AuthorTags | SeriesTags | PublicationTags | Quot
  * Extract tags from event
  */
 export function extractTagsFromEvent(event: { tags: string[][] }): {
-  type?: TagType
-  category?: TagCategory
-  id?: string
+  type?: TagType | undefined
+  category?: TagCategory | undefined
+  id?: string | undefined
   paywall: boolean
   payment: boolean
+  title?: string | undefined
+  preview?: string | undefined
+  description?: string | undefined
+  mainnetAddress?: string | undefined
+  totalSponsoring?: number | undefined
+  seriesId?: string | undefined
+  coverUrl?: string | undefined
+  bannerUrl?: string | undefined
+  zapAmount?: number | undefined
+  invoice?: string | undefined
+  paymentHash?: string | undefined
+  articleId?: string | undefined
+  reviewerPubkey?: string | undefined
   [key: string]: unknown
 } {
   const findTag = (key: string) => event.tags.find((tag) => tag[0] === key)?.[1]
diff --git a/lib/zapAggregation.ts b/lib/zapAggregation.ts
index 83be29d..84669a9 100644
--- a/lib/zapAggregation.ts
+++ b/lib/zapAggregation.ts
@@ -85,7 +85,6 @@ function collectZap(
     sub.on('eose', () => done())
     setTimeout(() => done(), timeout).unref?.()
     if (typeof (sub as unknown as { on?: unknown }).on === 'function') {
-      // eslint-disable-next-line @typescript-eslint/no-explicit-any
       ;(sub as any).on('error', onError)
     }
   })