Render profiles as badges with verification when possible

src/app.css

@@ -265,6 +265,9 @@
     @apply bg-primary-50 text-primary-800 text-sm font-medium me-2 px-2.5 py-0.5 rounded-sm dark:bg-primary-900 dark:text-primary-200;
   }
 
+  .npub-badge {
+    @apply inline-flex items-center text-primary-600 dark:text-primary-500 hover:underline me-2 px-2.5 py-0.5 rounded-sm border border-primary-600 dark:border-primary-500;
+  }
 }
 
 @layer components {

src/lib/snippets/UserSnippets.svelte

@@ -0,0 +1,13 @@
+<script lang='ts'>
+  import { createProfileLink, createProfileLinkWithVerification } from '$lib/utils/nostrUtils';
+</script>
+
+{#snippet userBadge(identifier: string, displayText: string | undefined)}
+  {#await createProfileLinkWithVerification(identifier, displayText)}
+    {@html createProfileLink(identifier, displayText)}
+  {:then html}
+    {@html html}
+  {:catch}
+    {@html createProfileLink(identifier, displayText)}
+  {/await}
+{/snippet}

src/lib/utils/nostrUtils.ts

@@ -2,6 +2,11 @@ import { get } from 'svelte/store';
 import { nip19 } from 'nostr-tools';
 import { ndkInstance } from '$lib/ndk';
 import { npubCache } from './npubCache';
+import { NDKUser } from "@nostr-dev-kit/ndk";
+
+const badgeCheckSvg = '<svg class="w-6 h-6 text-gray-800 dark:text-white" aria-hidden="true" xmlns="http://www.w3.org/2000/svg" width="24" height="24" fill="currentColor" viewBox="0 0 24 24"><path fill-rule="evenodd" d="M12 2c-.791 0-1.55.314-2.11.874l-.893.893a.985.985 0 0 1-.696.288H7.04A2.984 2.984 0 0 0 4.055 7.04v1.262a.986.986 0 0 1-.288.696l-.893.893a2.984 2.984 0 0 0 0 4.22l.893.893a.985.985 0 0 1 .288.696v1.262a2.984 2.984 0 0 0 2.984 2.984h1.262c.261 0 .512.104.696.288l.893.893a2.984 2.984 0 0 0 4.22 0l.893-.893a.985.985 0 0 1 .696-.288h1.262a2.984 2.984 0 0 0 2.984-2.984V15.7c0-.261.104-.512.288-.696l.893-.893a2.984 2.984 0 0 0 0-4.22l-.893-.893a.985.985 0 0 1-.288-.696V7.04a2.984 2.984 0 0 0-2.984-2.984h-1.262a.985.985 0 0 1-.696-.288l-.893-.893A2.984 2.984 0 0 0 12 2Zm3.683 7.73a1 1 0 1 0-1.414-1.413l-4.253 4.253-1.277-1.277a1 1 0 0 0-1.415 1.414l1.985 1.984a1 1 0 0 0 1.414 0l4.96-4.96Z" clip-rule="evenodd"/></svg>'
+
+const graduationCapSvg = '<svg class="w-6 h-6 text-gray-800 dark:text-white" aria-hidden="true" xmlns="http://www.w3.org/2000/svg" width="24" height="24" fill="currentColor" viewBox="0 0 24 24"><path d="M12.4472 4.10557c-.2815-.14076-.6129-.14076-.8944 0L2.76981 8.49706l9.21949 4.39024L21 8.38195l-8.5528-4.27638Z"/><path d="M5 17.2222v-5.448l6.5701 3.1286c.278.1325.6016.1293.8771-.0084L19 11.618v5.6042c0 .2857-.1229.5583-.3364.7481l-.0025.0022-.0041.0036-.0103.009-.0119.0101-.0181.0152c-.024.02-.0562.0462-.0965.0776-.0807.0627-.1942.1465-.3405.2441-.2926.195-.7171.4455-1.2736.6928C15.7905 19.5208 14.1527 20 12 20c-2.15265 0-3.79045-.4792-4.90614-.9751-.5565-.2473-.98098-.4978-1.27356-.6928-.14631-.0976-.2598-.1814-.34049-.2441-.04036-.0314-.07254-.0576-.09656-.0776-.01201-.01-.02198-.0185-.02991-.0253l-.01038-.009-.00404-.0036-.00174-.0015-.0008-.0007s-.00004 0 .00978-.0112l-.00009-.0012-.01043.0117C5.12215 17.7799 5 17.5079 5 17.2222Zm-3-6.8765 2 .9523V17c0 .5523-.44772 1-1 1s-1-.4477-1-1v-6.6543Z"/></svg>';
 
 // Regular expressions for Nostr identifiers - match the entire identifier including any prefix
 export const NOSTR_PROFILE_REGEX = /(?<![\w/])((nostr:)?(npub|nprofile)[a-zA-Z0-9]{20,})(?![\w/])/g;
@@ -91,15 +96,60 @@ export async function getUserMetadata(identifier: string): Promise<{name?: strin
 /**
  * Create a profile link element
  */
-function createProfileLink(identifier: string, displayText: string | undefined): string {
+export function createProfileLink(identifier: string, displayText: string | undefined): string {
   const cleanId = identifier.replace(/^nostr:/, '');
   const escapedId = escapeHtml(cleanId);
   const defaultText = `${cleanId.slice(0, 8)}...${cleanId.slice(-4)}`;
   const escapedText = escapeHtml(displayText || defaultText);
   
-  return `<a href="https://njump.me/${escapedId}" class="inline-flex items-center text-primary-600 dark:text-primary-500 hover:underline" target="_blank">@${escapedText}</a>`;
+  return `<a href="https://njump.me/${escapedId}" class="npub-badge" target="_blank">@${escapedText}</a>`;
+}
+
+/**
+ * Create a profile link element with a NIP-05 verification indicator.
+ */
+export async function createProfileLinkWithVerification(identifier: string, displayText: string | undefined): Promise<string> {
+  const ndk = get(ndkInstance) as NDK;
+  if (!ndk) {
+    return createProfileLink(identifier, displayText);
+  }
+
+  const cleanId = identifier.replace(/^nostr:/, '');
+  const isNpub = cleanId.startsWith('npub');
+
+  let user: NDKUser;
+  if (isNpub) {
+    user = ndk.getUser({ npub: cleanId });
+  } else {
+    user = ndk.getUser({ pubkey: cleanId });
+  }
+
+  const profile = await user.fetchProfile();
+  const nip05 = profile?.nip05;
+
+  if (!nip05) {
+    return createProfileLink(identifier, displayText);
+  }
+
+  const defaultText = `${cleanId.slice(0, 8)}...${cleanId.slice(-4)}`;
+  const escapedText = escapeHtml(displayText || defaultText);
+  const displayIdentifier = profile?.displayName ?? profile?.name ?? escapedText;
+
+  const isVerified = await user.validateNip05(nip05);
+  
+  if (!isVerified) {
+    return createProfileLink(identifier, displayText);
   }
   
+  // TODO: Make this work with an enum in case we add more types.
+  const type = nip05.endsWith('edu') ? 'edu' : 'standard';
+  switch (type) {
+    case 'edu':
+      return `<span class="npub-badge">${graduationCapSvg}<a href="https://njump.me/${escapedId}" target="_blank">@${displayIdentifier}</a></span>`;
+    case 'standard':
+      return `<span class="npub-badge">${badgeCheckSvg}<a href="https://njump.me/${escapedId}" target="_blank">@${displayIdentifier}</a></span>`;
+  }
+}
 /**
  * Create a note link element
  */