criando evento de mensagem criptografada

src/app/shared/nostr-api/nostr-event.factory.ts

@@ -1,7 +1,7 @@
 import { Injectable } from '@angular/core';
 import { NostrEventKind } from '@domain/nostr-event-kind.enum';
 import { NostrUser } from '@domain/nostr-user';
-import { UnsignedEvent, getEventHash, getSignature, nip04 } from 'nostr-tools';
+import { Event, UnsignedEvent, getEventHash, getSignature, nip04 } from 'nostr-tools';
 
 @Injectable({
   providedIn: 'root'
@@ -31,16 +31,33 @@ export class NostrEventFactory {
   /**
    * NIP 4
    * https://github.com/nostr-protocol/nips/blob/master/04.md
+   * https://github.com/nbd-wtf/nostr-tools/blob/master/nip04.test.ts
    */
-  createEncryptedDirectMessage() {
+  async createEncryptedDirectMessage(you: NostrUser, stranger: NostrUser, message: string): Promise<Event<NostrEventKind.EncryptedDirectMessage>> {
+    const encriptedMessage = await nip04.encrypt(you.nostrSecret, stranger.nostrPublic, message);
 
+    const unsignedEvent: UnsignedEvent = {
+      kind: NostrEventKind.EncryptedDirectMessage,
+      content: encriptedMessage, // + '?iv=' + ivBase64,
+      pubkey: you.publicKeyHex,
+      // eslint-disable-next-line @typescript-eslint/naming-convention
+      created_at: this.getCurrentTimestamp(),
+      tags: [
+        ['p', stranger.publicKeyHex]
+      ]
+    };
+
+    const id = getEventHash(unsignedEvent);
+    const sig = getSignature(unsignedEvent, you.privateKeyHex);
+
+    return Promise.resolve({ id, sig, ...unsignedEvent });
   }
 
   /**
    * NIP 38
    * https://github.com/nostr-protocol/nips/blob/master/38.md
    */
-  createUserStatuses(user: NostrUser) {
+  createUserStatuses(user: NostrUser): Event<NostrEventKind.UserStatuses> {
     const unsignedEvent: UnsignedEvent = {
       kind: NostrEventKind.UserStatuses,
       content: "#wannachat",

src/app/shared/nostr-api/nostr.service.ts

@@ -1,7 +1,6 @@
 import { Injectable } from '@angular/core';
+import { Event, Filter, SimplePool } from 'nostr-tools';
 import { defaultRelays } from '../../default-relays.const';
-import { Filter, Event, SimplePool, UnsignedEvent } from 'nostr-tools';
-import { NostrUser } from 'src/app/domain/nostr-user';
 
 @Injectable({
   providedIn: 'root'