Add constants in `Token`model class to manipulate values instead of string values - `UCOAddress ='UCO'` - ìsFungible => `type == 'fungible'` - isNonFungible => `type == 'non-fungible'`
Add constants in
Tokenmodel class to manipulate values instead of string valuesUCOAddress ='UCO'type == 'fungible'type == 'non-fungible'