I want to get List of transfer id and voucher id from the user and then store it in the contract class. Each transfer Id has related voucher Id.
I have thought that I can define List of container. each container has two elements. one transfer Id and other one voucher Id related to the transfer Id. This solution is not working I've receive this error: Invalid parameter container type. it seems I can not use container type in contract class.
I want to know what is the Best solution considering performance for performing this action?