To set up the NFT Marketplace for test and production mode go to Design Console -> Publish -> ‘Payment and Fees section’. Use toggle button to switch between test and production modes.
Users cannot toggle back to test mode once they move to production mode and launch the app. They must obtain the stripe keys that are authenticated for payments.
Add publishable and secret keys which can be obtained from Stripe console. The publishable key and secret key are both mandatory requirements for both card and crypto payments even in test mode.