From 77d8848a01a87bfe02a41508f206e8c40dc4bc55 Mon Sep 17 00:00:00 2001
From: Pablo Fernandez <p@f7z.io>
Date: Tue, 2 Jan 2024 12:21:56 +0000
Subject: [PATCH] improvements around nip89 announcement

---
 README.md             | 24 ++++++++++++++
 src/commands/start.ts | 77 ++++++++++++++++++++++++++++++++++++++++++-
 src/config/index.ts   |  5 +++
 3 files changed, 105 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 28b5495..efa3de3 100644
--- a/README.md
+++ b/README.md
@@ -119,6 +119,18 @@ To enable this you'll need to configure a few things on your `nsecbunker.json` c
         "your-domain-here": {
             "nip05": "/your-nip05-nostr.json-file", // The location where NIP-05 entries to your domain are stored
 
+            "nip89": {
+                "profile": { // a kind:0-like profile
+                    "name": "my cool nsecbunker instance", // The name of your nsecBunker instance
+                    "about": "...",
+                },
+                "operator": "npub1l2vyh47mk2p0qlsku7hg0vn29faehy9hy34ygaclpn66ukqp3afqutajft", // (optional) npub of the operator of this nsecbunker
+                "relays": [ // list of relays where to publush the nip89 announcement
+                    "https://relay.damus.io",
+                    "https://pyramid.fiatjaf.com"
+                ]
+            }
+
             // Wallet configuration (optional)
             "wallet": {
                 "lnbits": {
@@ -142,6 +154,18 @@ For this to work you'll need to run, in addition to `nsecbunkerd`, an lnbits ins
 
 - [ ] TODO: Add NWC support
 
+When booting up, the nsecbunkerd will publish a NIP-89 announcement (`kind:31990`), which is the way clients find out about your nsecbunker.
+
+When a bunker provides a wallet and zapping service (`wallet` and `nostdressUrl` are configured), it will add tags:
+```json
+{
+    "tags": [
+        [ "f", "wallet" ],
+        [ "f", "zaps" ]
+    ]
+}
+```
+
 # Authors
 
 * [pablof7z](nostr:npub1l2vyh47mk2p0qlsku7hg0vn29faehy9hy34ygaclpn66ukqp3afqutajft)
diff --git a/src/commands/start.ts b/src/commands/start.ts
index 7e6619f..8b0e75d 100644
--- a/src/commands/start.ts
+++ b/src/commands/start.ts
@@ -1,8 +1,10 @@
 import readline from 'readline';
-import { getCurrentConfig, saveCurrentConfig } from '../config/index.js';
+import { DomainConfig, IConfig, getCurrentConfig, saveCurrentConfig } from '../config/index.js';
 import { decryptNsec } from '../config/keys.js';
 import { fork } from 'child_process';
 import { resolve } from 'path';
+import NDK, { NDKAppHandlerEvent, NDKKind, NDKPrivateKeySigner, NDKUser, NostrEvent } from '@nostr-dev-kit/ndk';
+import { debug } from 'console';
 
 interface IOpts {
     keys: string[];
@@ -11,6 +13,77 @@ interface IOpts {
     adminNpubs: string[];
 }
 
+async function nip89announcement(configData: IConfig) {
+    const domains = configData.domains as Record<string, DomainConfig>;
+    for (const [ domain, config ] of Object.entries(domains)) {
+        const hasNip89 = !!config.nip89;
+        if (!hasNip89) continue;
+
+        const profile = config.nip89!.profile;
+        const relays = config.nip89!.relays;
+
+        if (!profile) {
+            console.log(`❌ No NIP-89 profile in configuration of ${domain}!`);
+            continue
+        }
+
+        if (!relays || relays.length === 0) {
+            console.log(`❌ No relays in NIP-89 configuration of ${domain}!`);
+            continue
+        }
+
+        const hasWallet = !!config.wallet;
+        const hasNostrdress = !!config.wallet?.lnbits?.nostdressUrl;
+
+        const ndk = new NDK({explicitRelayUrls: relays});
+        ndk.signer = new NDKPrivateKeySigner(configData.admin.key);
+        ndk.connect(5000).then(async () => {
+            const event = new NDKAppHandlerEvent(ndk, {
+                tags: [
+                    [ "alt", "This is an nsecBunker announcement" ]
+                ]
+            } as NostrEvent);
+
+            const operator = config.nip89!.operator;
+            if (operator) {
+                try {
+                    const opUser = new NDKUser({npub: operator});
+                    event.tags.push(["p", opUser.pubkey]);
+                } catch {}
+            }
+
+            try {
+                const user = await ndk.signer!.user();
+                const existingEvent = await ndk.fetchEvent({
+                    authors: [user.pubkey],
+                    kinds: [NDKKind.AppHandler],
+                    "#k": [NDKKind.NostrConnect.toString()]
+                });
+
+                if (existingEvent) {
+                    debug(`🔍 Found existing NIP-89 announcement for ${domain}:`, existingEvent.encode());
+                    // update existing event
+                    const dTag = existingEvent.tagValue("d");
+                    event.tags.push(["d", dTag!])
+                } else {
+                    debug(`🔍 No existing NIP-89 announcement for ${domain} found.`);
+                    event.tags.push(["d", NDKKind.NostrConnect.toString()]);
+                }
+
+                event.content = JSON.stringify(profile);
+                event.tags.push(["k", NDKKind.NostrConnect.toString()])
+                if (hasWallet && hasNostrdress) {
+                    // add wallet and zaps feature tags
+                    event.tags.push(["f", "wallet"]);
+                    event.tags.push(["f", "zaps"]);
+                }
+                await event.publish();
+                debug(`✅ Published NIP-89 announcement for ${domain}:`, event.encode());
+            } catch(e: any) { console.log(`❌ Failed to publish NIP-89 announcement for ${domain}!`, e.message); }
+        })
+    }
+}
+
 /**
  * This command starts the nsecbunkerd process with an (optional)
  * admin interface over websockets or redis.
@@ -24,6 +97,8 @@ export async function start(opts: IOpts) {
 
     await saveCurrentConfig(opts.config, configData);
 
+    nip89announcement(configData);
+
     if (opts.verbose) {
         configData.verbose = opts.verbose;
     }
diff --git a/src/config/index.ts b/src/config/index.ts
index a3ee162..5622fa0 100644
--- a/src/config/index.ts
+++ b/src/config/index.ts
@@ -18,6 +18,11 @@ export interface IWalletConfig {
 
 export interface DomainConfig {
     nip05: string;
+    nip89?: {
+        profile: Record<string, string>;
+        operator?: string;
+        relays: string[];
+    },
     wallet?: IWalletConfig;
     defaultProfile?: Record<string, string>;
 };