From 0e15e174c564c4ba4e9cc3874b675fbbcc597c1e Mon Sep 17 00:00:00 2001
From: Alex Gleason <alex@alexgleason.me>
Date: Sun, 9 Jul 2023 12:55:37 -0500
Subject: [PATCH] Add nostr.json (NIP-05)

---
 src/app.ts                          |  3 +++
 src/config.ts                       |  3 +++
 src/controllers/well-known/nostr.ts | 34 +++++++++++++++++++++++++++++
 3 files changed, 40 insertions(+)
 create mode 100644 src/controllers/well-known/nostr.ts

diff --git a/src/app.ts b/src/app.ts
index 9104e2bb..175eb575 100644
--- a/src/app.ts
+++ b/src/app.ts
@@ -27,6 +27,7 @@ import {
 } from './controllers/api/statuses.ts';
 import { streamingController } from './controllers/api/streaming.ts';
 import { indexController } from './controllers/site.ts';
+import { nostrController } from './controllers/well-known/nostr.ts';
 import { auth19, requireAuth } from './middleware/auth19.ts';
 import { auth98 } from './middleware/auth98.ts';
 
@@ -56,6 +57,8 @@ app.get('/api/v1/streaming/', streamingController);
 
 app.use('*', cors({ origin: '*', exposeHeaders: ['link'] }), auth19, auth98());
 
+app.get('/.well-known/nostr.json', nostrController);
+
 app.get('/api/v1/instance', instanceController);
 
 app.get('/api/v1/apps/verify_credentials', appCredentialsController);
diff --git a/src/config.ts b/src/config.ts
index d07b7909..fd208c07 100644
--- a/src/config.ts
+++ b/src/config.ts
@@ -3,6 +3,9 @@ const Conf = {
   get nsec() {
     return Deno.env.get('DITTO_NSEC');
   },
+  get relay() {
+    return Deno.env.get('DITTO_RELAY');
+  },
   get localDomain() {
     return Deno.env.get('LOCAL_DOMAIN') || 'http://localhost:8000';
   },
diff --git a/src/controllers/well-known/nostr.ts b/src/controllers/well-known/nostr.ts
new file mode 100644
index 00000000..b1b84336
--- /dev/null
+++ b/src/controllers/well-known/nostr.ts
@@ -0,0 +1,34 @@
+import { db } from '@/db.ts';
+import { z } from '@/deps.ts';
+
+import type { AppController } from '@/app.ts';
+import { Conf } from '../../config.ts';
+
+const nameSchema = z.string().min(1).regex(/^[\w_]+$/);
+
+/**
+ * Serves NIP-05's nostr.json.
+ * https://github.com/nostr-protocol/nips/blob/master/05.md
+ */
+const nostrController: AppController = async (c) => {
+  try {
+    const name = nameSchema.parse(c.req.query('name'));
+    const user = await db.users.findFirst({ where: { username: name } });
+    const relay = Conf.relay;
+
+    return c.json({
+      names: {
+        [user.username]: user.pubkey,
+      },
+      relays: relay
+        ? {
+          [user.pubkey]: [relay],
+        }
+        : {},
+    });
+  } catch (_e) {
+    return c.json({ names: {}, relays: {} });
+  }
+};
+
+export { nostrController };