From 4c68be19fe7267ffbaf49b5c0d9f47f3b4a9f306 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?R=C3=A2u=20Cao?= <raucao@kosmos.org>
Date: Fri, 25 Oct 2024 17:50:59 +0200
Subject: [PATCH] Verify nip05 address, display status

---
 assets/css/layout.css               | 18 +++++++++++++++++-
 assets/css/themes/default-light.css | 14 ++++++++++++++
 handlers/user-profile.ts            |  2 +-
 html.ts                             | 22 +++++++++++++++++++++-
 models/profile.ts                   | 11 ++++++++++-
 nostr.ts                            | 22 ++++++++++++++++++++++
 6 files changed, 85 insertions(+), 4 deletions(-)

diff --git a/assets/css/layout.css b/assets/css/layout.css
index 0b801f5..18c696f 100644
--- a/assets/css/layout.css
+++ b/assets/css/layout.css
@@ -108,6 +108,14 @@ main.profile-page header {
   margin-bottom: 2rem;
 }
 
+main.profile-page header h1 {
+  margin-bottom: 0;
+}
+
+main.profile-page header .nip05 {
+  font-size: 1rem;
+}
+
 main.profile-page img.avatar {
   height: 8rem;
   width: 8rem;
@@ -134,6 +142,14 @@ main article footer {
   margin-top: 5rem;
 }
 
+.nip05 .verified,
+.nip05 .not-verified {
+  margin-left: 0.3rem;
+  padding: 0.1em 0.3em;
+  border-radius: 5px;
+  cursor: default;
+}
+
 /* Dropdown menu */
 
 .dropdown {
@@ -202,7 +218,7 @@ main article footer {
     margin: 4rem 1rem 8rem 1rem !important;
   }
 
-  .profile-page h1 {
+  main.profile-page h1 {
     margin-top: 2rem;
   }
 
diff --git a/assets/css/themes/default-light.css b/assets/css/themes/default-light.css
index fc875d1..5e880b0 100644
--- a/assets/css/themes/default-light.css
+++ b/assets/css/themes/default-light.css
@@ -68,10 +68,24 @@ main header .meta .name a {
   color: var(--text-color-body);
 }
 
+main.profile-page header .nip05 {
+  color: var(--text-color-discreet);
+}
+
 main.profile-page .pubkey {
   color: var(--text-color-discreet);
 }
 
+.nip05 .verified {
+  background-color: #e8e3da;
+  color: #027739;
+}
+
+.nip05 .not-verified {
+  background-color: #e8e3da;
+  color: #770202;
+}
+
 /* Dropdown menu */
 
 .dropdown {
diff --git a/handlers/user-profile.ts b/handlers/user-profile.ts
index cfc4537..e561ee6 100644
--- a/handlers/user-profile.ts
+++ b/handlers/user-profile.ts
@@ -22,7 +22,7 @@ const userProfileHandler = async function (ctx: Context) {
     const profile = new Profile(profileEvent, username);
     const articleEvents = await fetchArticlesByAuthor(pubkey);
     const articles = articleEvents.map((a) => new Article(a));
-    const html = profilePageHtml(profile, articles);
+    const html = await profilePageHtml(profile, articles);
     generateOgProfileImage(profile);
 
     ctx.response.body = html;
diff --git a/html.ts b/html.ts
index f4b6f16..9f42b31 100644
--- a/html.ts
+++ b/html.ts
@@ -120,8 +120,27 @@ function userAddressHtml(profile: Profile) {
   return html;
 }
 
-export function profilePageHtml(profile: Profile, articles: Article[]): string {
+function nip05VerifiedHtml(verified: boolean): string {
+  if (verified) {
+    return ` <span class="verified" title="Verified">✔</span>`;
+  } else {
+    return ` <span class="not-verified" title="Verification failed">✕</span>`;
+  }
+}
+
+export async function profilePageHtml(
+  profile: Profile,
+  articles: Article[],
+): Promise<string> {
   const title = `${profile.name} on Nostr`;
+  let nip05Html = "";
+
+  if (profile.nip05) {
+    const nip05Verified = await profile.verifyNip05();
+    nip05Html += `<p class="nip05">${profile.nip05}${
+      nip05VerifiedHtml(nip05Verified)
+    }</p>\n`;
+  }
 
   const body = `
     <main class="profile-page">
@@ -129,6 +148,7 @@ export function profilePageHtml(profile: Profile, articles: Article[]): string {
         <img class="avatar" src="${profile.picture}" alt="User Avatar" />
         <div class="bio">
           <h1>${profile.name}</h1>
+          ${nip05Html}
           <p class="about">
             ${profile.about}
           </p>
diff --git a/models/profile.ts b/models/profile.ts
index fcb9b8d..05e5415 100644
--- a/models/profile.ts
+++ b/models/profile.ts
@@ -1,4 +1,5 @@
 import { nip19, NostrEvent as NEvent } from "@nostr/tools";
+import { verifyNip05Address } from "../nostr.ts";
 import { getImageMagickCommand } from "../utils.ts";
 import config from "../config.ts";
 
@@ -43,7 +44,7 @@ export default class Profile {
   }
 
   get nip05(): string | undefined {
-    return this.data.nip05;
+    return this.data.nip05?.replace("_@", "");
   }
 
   get lud16(): string | undefined {
@@ -69,4 +70,12 @@ export default class Profile {
       return this.picture || "";
     }
   }
+
+  verifyNip05(): Promise<boolean> {
+    if (typeof this.data.nip05 !== "undefined") {
+      return verifyNip05Address(this.data.nip05, this.pubkey);
+    } else {
+      return Promise.resolve(false);
+    }
+  }
 }
diff --git a/nostr.ts b/nostr.ts
index 6c7eb5b..49606c8 100644
--- a/nostr.ts
+++ b/nostr.ts
@@ -113,3 +113,25 @@ export async function replaceNostrUris(markdown: string): Promise<string> {
 
   return markdown;
 }
+
+export async function verifyNip05Address(
+  address: string,
+  pubkey: string,
+): Promise<boolean> {
+  const [username, host] = address.split("@");
+  const url = `https://${host}/.well-known/nostr.json?name=${username}`;
+
+  try {
+    const res = await fetch(url);
+    if (res.status === 404 || !res.ok) return false;
+    const data = await res.json();
+
+    if (data.names && data.names[username] === pubkey) {
+      return true;
+    } else {
+      return false;
+    }
+  } catch (_e) {
+    return false;
+  }
+}