Use random private key for bunker connection

packages/system/src/event-publisher.ts

@@ -43,6 +43,10 @@ export class PrivateKeySigner implements EventSigner {
     this.#publicKey = getPublicKey(this.#privateKey);
   }
 
+  get privateKey() {
+    return this.#privateKey;
+  }
+
   init(): Promise<void> {
     return Promise.resolve();
   }

packages/system/src/impl/nip46.ts

@@ -67,6 +67,12 @@ export class Nip46Signer implements EventSigner {
         return [this.#relay];
     }
 
+    get privateKey() {
+        if(this.#insideSigner instanceof PrivateKeySigner) {
+            return this.#insideSigner.privateKey;
+        }
+    }
+
     async init() {
         const isBunker = this.#proto === "bunker:";
         if (isBunker) {