docs: async def abbreviate_verkey(did: str,
                            full_verkey: str) -> str:
      """
      Retrieves abbreviated verkey if it is possible otherwise return full verkey.
  
      :param did: The DID.
      :param full_verkey: The DIDs verification key,
      :return: metadata: Either abbreviated or full verkey.
      """
  
      logger = logging.getLogger(__name__)
      logger.debug("abbreviate_verkey: >>> did: %r, full_verkey: %r",
                   did, full_verkey)
  
      if not hasattr(abbreviate_verkey, "cb"):
          logger.debug("abbreviate_verkey: Creating callback")
          abbreviate_verkey.cb = create_cb(CFUNCTYPE(None, c_int32, c_int32, c_char_p))
  
      c_did = c_char_p(did.encode('utf-8'))
      c_full_verkey = c_char_p(full_verkey.encode('utf-8'))
  
      metadata = await do_call('indy_abbreviate_verkey',
                               c_did,
                               c_full_verkey,
                               abbreviate_verkey.cb)
  
      res = metadata.decode()
  
      logger.debug("abbreviate_verkey: <<< res: %r", res)
      return res