code review

lib/src/nostr_signer_actor.dart

@@ -1,9 +1,7 @@
-import 'dart:convert';
-import 'dart:math';
-
 import 'package:actors/actors.dart';
 import 'package:bip340/bip340.dart' as bip340;
-import 'package:crypto/crypto.dart';
+
+import 'nostr_event.dart';
 
 sealed class SignerMessage {
   const SignerMessage();
@@ -60,26 +58,13 @@ class NostrSignerActor with Handler<SignerMessage, SignerResult> {
     List<List<String>> tags,
     String content,
     int? createdAt,
-  ) {
-    final ts = createdAt ?? DateTime.now().millisecondsSinceEpoch ~/ 1000;
-    final ser = jsonEncode([0, _publicKey, ts, kind, tags, content]);
-    final idBytes = sha256.convert(utf8.encode(ser)).bytes;
-    final id = idBytes.map((b) => b.toRadixString(16).padLeft(2, '0')).join();
-
-    final rng = Random.secure();
-    final auxBytes = List.generate(32, (_) => rng.nextInt(256));
-    final aux = auxBytes.map((b) => b.toRadixString(16).padLeft(2, '0')).join();
-
-    final sig = bip340.sign(_privateKey, id, aux);
-
-    return EventSigned(jsonEncode({
-      'id': id,
-      'pubkey': _publicKey,
-      'created_at': ts,
-      'kind': kind,
-      'tags': tags,
-      'content': content,
-      'sig': sig,
-    }));
-  }
+  ) =>
+      EventSigned(signNostrEvent(
+        privateKey: _privateKey,
+        publicKey: _publicKey,
+        kind: kind,
+        tags: tags,
+        content: content,
+        createdAt: createdAt,
+      ));
 }