Add my_fingerprint method

Signed-off-by: Maxime “pep” Buquet <pep@bouah.net>

slixmpp_omemo/__init__.py

@@ -255,6 +255,10 @@ class XEP_0384(BasePlugin):
     def my_device_id(self) -> int:
         return self._device_id
 
+    def my_fingerprint(self) -> str:
+        bundle = self._omemo.public_bundle.serialize(self.omemo_backend)
+        return fp_from_ik(bundle['ik'])
+
     def _set_node_config(
             self,
             node: str,