The permanent token is not getting generated for Bancontact

Scope

InvalidRequestError: Either of payment method details or tmp token input should be specified. - Bancontact

Solution

This error is seen when you create the permanent token by payment method as "card" or "Bancontact" and pass Bancontact as the payment method.

Bancontact is a one-time payment method, so there won't be any permanent tokens available, but if you want to use permanent tokens make sure you use the Sepa payment methods as permanent tokens.