code: func handleValidateAddress(s *rpcServer, cmd interface{}, closeChan <-chan struct{}) (interface{}, error) {
  	c := cmd.(*btcjson.ValidateAddressCmd)
  
  	result := btcjson.ValidateAddressChainResult{}
  	addr, err := btcutil.DecodeAddress(c.Address, s.cfg.ChainParams)
  	if err != nil {
  		// Return the default value (false) for IsValid.
  		return result, nil
  	}
  
  	result.Address = addr.EncodeAddress()
  	result.IsValid = true
  
  	return result, nil
  }
docs: // handleValidateAddress implements the validateaddress command.