feat: implement NIP-09 event deletion for service announcements (v0.1.19)

packages/dvmcp-bridge/README.md

@@ -8,6 +8,7 @@ A bridge implementation that connects Model Context Protocol (MCP) servers to No
 - Automatic service announcement using NIP-89
 - Tool discovery and execution through DVM kind:5910/6910 events
 - Job status updates and payment handling via kind:7000 events
+- Service announcement deletion using NIP-09
 - Comprehensive error handling
 
 ## Configuration
@@ -47,6 +48,22 @@ For production:
 bun run start
 ```
 
+### Deleting Service Announcements
+
+To remove your service announcements from relays when shutting down or taking your service offline, you can use the `--delete-announcement` flag:
+
+```bash
+bun run start --delete-announcement
+```
+
+You can also provide an optional reason for the deletion:
+
+```bash
+bun run start --delete-announcement --reason "Service maintenance in progress"
+```
+
+This will send a NIP-09 deletion event (kind 5) to all connected relays, instructing them to remove your previously published service announcements.
+
 ## Testing
 
 Run the test suite:

packages/dvmcp-bridge/cli.ts

@@ -14,6 +14,7 @@ import {
 import { argv } from 'process';
 import type { Config } from './src/types';
 import { setConfigPath } from './src/config.js';
+import { DVMBridge } from './src/dvm-bridge.js';
 
 const defaultConfigPath = join(process.cwd(), 'config.dvmcp.yml');
 let configPath = defaultConfigPath;
@@ -118,9 +119,38 @@ const runApp = async () => {
   await main.default();
 };
 
+const deleteAnnouncement = async () => {
+  // Get optional reason from command line arguments
+  const reasonIndex = argv.indexOf('--reason');
+  const reason = reasonIndex !== -1 && argv[reasonIndex + 1] ? argv[reasonIndex + 1] : undefined;
+  
+  // Import DVMBridge and perform deletion
+  const bridge = new DVMBridge();
+  
+  try {
+    console.log(`${CONFIG_EMOJIS.INFO} Deleting service announcement...`);
+    await bridge.deleteAnnouncement(reason);
+    console.log(`${CONFIG_EMOJIS.SUCCESS} Service announcement deleted successfully`);
+    process.exit(0);
+  } catch (error) {
+    console.error(`${CONFIG_EMOJIS.INFO} Failed to delete service announcement:`, error);
+    process.exit(1);
+  }
+};
+
 const cliMain = async () => {
   if (argv.includes('--configure')) {
     await configure();
+    return;
+  }
+  
+  if (argv.includes('--delete-announcement')) {
+    if (!existsSync(configPath)) {
+      console.error(`${CONFIG_EMOJIS.INFO} No configuration file found at ${configPath}`);
+      process.exit(1);
+    }
+    await deleteAnnouncement();
+    return;
   }
 
   if (!existsSync(configPath)) {

packages/dvmcp-bridge/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@dvmcp/bridge",
-  "version": "0.1.18",
+  "version": "0.1.19",
   "description": "Bridge connecting MCP servers to Nostr's DVM ecosystem",
   "module": "index.ts",
   "type": "module",

packages/dvmcp-bridge/src/announcer.ts

@@ -7,6 +7,7 @@ import {
   DVM_ANNOUNCEMENT_KIND,
   TOOL_REQUEST_KIND,
 } from '@dvmcp/commons/constants';
+import type { Event } from 'nostr-tools/pure';
 
 export const keyManager = createKeyManager(CONFIG.nostr.privateKey);
 
@@ -57,4 +58,37 @@ export class NostrAnnouncer {
   async updateAnnouncement() {
     await Promise.all([this.announceService(), this.announceRelayList()]);
   }
+
+  /**
+   * Deletes the service announcement from relays using NIP-09
+   * @param reason Optional reason for deletion
+   * @returns The deletion event that was published
+   */
+  async deleteAnnouncement(reason: string = 'Service offline'): Promise<Event> {
+    // First, query the relays to find our announcement event
+    const announcementFilter = {
+      kinds: [DVM_ANNOUNCEMENT_KIND],
+      authors: [keyManager.getPublicKey()],
+    };
+    
+    const events = await this.relayHandler.queryEvents(announcementFilter);
+    
+    // Create the deletion event (NIP-09)
+    const deletionEvent = keyManager.signEvent({
+      ...keyManager.createEventTemplate(5), // kind 5 is for deletion requests
+      content: reason,
+      tags: [
+        // Add tags for each event to be deleted
+        ...events.map(event => ['e', event.id]),
+        // Add the kind of events being deleted
+        ['k', `${DVM_ANNOUNCEMENT_KIND}`],
+      ],
+    });
+    
+    // Publish the deletion event
+    await this.relayHandler.publishEvent(deletionEvent);
+    console.log(`Published deletion event for service announcement`);
+    
+    return deletionEvent;
+  }
 }

packages/dvmcp-bridge/src/dvm-bridge.ts

@@ -82,6 +82,23 @@ export class DVMBridge {
       throw error;
     }
   }
+  
+  /**
+   * Deletes the service announcement from relays
+   * @param reason Optional reason for deletion
+   * @returns The deletion event that was published
+   */
+  async deleteAnnouncement(reason?: string) {
+    console.log('Deleting service announcement from relays...');
+    try {
+      const deletionEvent = await this.nostrAnnouncer.deleteAnnouncement(reason);
+      console.log('Service announcement deleted successfully');
+      return deletionEvent;
+    } catch (error) {
+      console.error('Error deleting service announcement:', error);
+      throw error;
+    }
+  }
 
   private async handleRequest(event: Event) {
     try {