Run addtional validation on NFTs before DB insertion

[fekete965]

Prerequisites

Please answer the following questions for yourself before submitting an issue.

• [x] This is a feature request only 💡
• [x] I checked to make sure that this feature has NOT already been requested

Why are you requesting this feature I think it would be worth running validation on each item before we send data to the DB.

Describe the solution you'd like Validate the created model before populating the insertable data list. If it passes the validation we add it to the list otherwise, we save the error in a separate list. We will prompt the user about the occurred errors and present it to the user on demand.

[fekete965]

I am also happy to work on this feature. :)

[0xSooki]

Great idea, feel free to work on it :)