code: func (c *Client) GetReceivedByAddressMinConfAsync(address btcutil.Address, minConfirms int) FutureGetReceivedByAddressResult {
  	addr := address.EncodeAddress()
  	cmd := btcjson.NewGetReceivedByAddressCmd(addr, &minConfirms)
  	return c.sendCmd(cmd)
  }
docs: // GetReceivedByAddressMinConfAsync returns an instance of a type that can be
  // used to get the result of the RPC at some future time by invoking the Receive
  // function on the returned instance.
  //
  // See GetReceivedByAddressMinConf for the blocking version and more details.