dhtrunner: add getPublicKey()

include/opendht/dhtrunner.h

@@ -303,6 +303,7 @@ public:
      * Get the public key fingerprint if an identity is used with this node, 0 otherwise.
      */
     InfoHash getId() const;
+    std::shared_ptr<crypto::PublicKey> getPublicKey() const;
 
     /**
      * Get the ID of the DHT node.

src/dhtrunner.cpp

@@ -406,6 +406,14 @@ DhtRunner::getId() const
     return {};
 }
 
+std::shared_ptr<crypto::PublicKey>
+DhtRunner::getPublicKey() const
+{
+    if (auto dht = activeDht())
+        return dht->getPublicKey();
+    return {};
+}
+
 InfoHash
 DhtRunner::getNodeId() const
 {