code: func (r FutureVerifyChainResult) Receive() (bool, error) {
  	res, err := receiveFuture(r)
  	if err != nil {
  		return false, err
  	}
  
  	// Unmarshal the result as a boolean.
  	var verified bool
  	err = json.Unmarshal(res, &verified)
  	if err != nil {
  		return false, err
  	}
  	return verified, nil
  }
docs: // Receive waits for the response promised by the future and returns whether
  // or not the chain verified based on the check level and number of blocks
  // to verify specified in the original call.